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freebsd/sys/contrib/pf/net/pf.c

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Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
/* $FreeBSD$ */
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
/* $OpenBSD: pf.c,v 1.433.2.2 2004/07/17 03:22:34 brad Exp $ */
Loopback fix from Daniel Hartmeier: pf_cksum_fixup() was called without last argument from normalization, also fixup checksum when random-id modifies ip_id. This would previously lead to incorrect checksums for packets modified by scrub random-id. (Originally) Submitted by: yongari
2004-08-12 13:59:44 +00:00
/* add $OpenBSD: pf.c,v 1.448 2004/05/11 07:34:11 dhartmei Exp $ */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
/*
* Copyright (c) 2001 Daniel Hartmeier
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
* Copyright (c) 2002,2003 Henning Brauer
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Effort sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F30602-01-2-0537.
*
*/
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#include "opt_inet.h"
#include "opt_inet6.h"
#endif
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#include "opt_bpf.h"
#include "opt_pf.h"
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#define NBPFILTER DEV_BPF
#define NPFLOG DEV_PFLOG
#define NPFSYNC DEV_PFSYNC
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#include "bpfilter.h"
#include "pflog.h"
#include "pfsync.h"
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/filio.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/kernel.h>
#include <sys/time.h>
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#include <sys/sysctl.h>
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#include <sys/endian.h>
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#include <sys/pool.h>
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#include <net/if.h>
#include <net/if_types.h>
#include <net/bpf.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_seq.h>
#include <netinet/udp.h>
#include <netinet/ip_icmp.h>
#include <netinet/in_pcb.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/udp_var.h>
#include <netinet/icmp_var.h>
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifndef __FreeBSD__
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#include <dev/rndvar.h>
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#include <net/pfvar.h>
#include <net/if_pflog.h>
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#if NPFSYNC > 0
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#include <net/if_pfsync.h>
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#endif /* NPFSYNC > 0 */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#ifdef INET6
#include <netinet/ip6.h>
#include <netinet/in_pcb.h>
#include <netinet/icmp6.h>
#include <netinet6/nd6.h>
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#include <netinet6/ip6_var.h>
#include <netinet6/in6_pcb.h>
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#endif /* INET6 */
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#include <machine/in_cksum.h>
#include <sys/limits.h>
#include <sys/ucred.h>
extern int ip_optcopy(struct ip *, struct ip *);
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#define DPFPRINTF(n, x) if (pf_status.debug >= (n)) printf x
/*
* Global variables
*/
struct pf_anchorqueue pf_anchors;
struct pf_ruleset pf_main_ruleset;
struct pf_altqqueue pf_altqs[2];
struct pf_palist pf_pabuf;
struct pf_altqqueue *pf_altqs_active;
struct pf_altqqueue *pf_altqs_inactive;
struct pf_status pf_status;
u_int32_t ticket_altqs_active;
u_int32_t ticket_altqs_inactive;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
int altqs_inactive_open;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
u_int32_t ticket_pabuf;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
struct callout pf_expire_to; /* expire timeout */
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct timeout pf_expire_to; /* expire timeout */
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
uma_zone_t pf_src_tree_pl, pf_rule_pl;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
uma_zone_t pf_state_pl, pf_altq_pl, pf_pooladdr_pl;
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pool pf_src_tree_pl, pf_rule_pl;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pool pf_state_pl, pf_altq_pl, pf_pooladdr_pl;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
void pf_print_host(struct pf_addr *, u_int16_t, u_int8_t);
void pf_print_state(struct pf_state *);
void pf_print_flags(u_int8_t);
void pf_change_ap(struct pf_addr *, u_int16_t *,
u_int16_t *, u_int16_t *, struct pf_addr *,
u_int16_t, u_int8_t, sa_family_t);
#ifdef INET6
void pf_change_a6(struct pf_addr *, u_int16_t *,
struct pf_addr *, u_int8_t);
#endif /* INET6 */
void pf_change_icmp(struct pf_addr *, u_int16_t *,
struct pf_addr *, struct pf_addr *, u_int16_t,
u_int16_t *, u_int16_t *, u_int16_t *,
u_int16_t *, u_int8_t, sa_family_t);
void pf_send_tcp(const struct pf_rule *, sa_family_t,
const struct pf_addr *, const struct pf_addr *,
u_int16_t, u_int16_t, u_int32_t, u_int32_t,
u_int8_t, u_int16_t, u_int16_t, u_int8_t);
void pf_send_icmp(struct mbuf *, u_int8_t, u_int8_t,
sa_family_t, struct pf_rule *);
struct pf_rule *pf_match_translation(struct pf_pdesc *, struct mbuf *,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
int, int, struct pfi_kif *,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_addr *, u_int16_t, struct pf_addr *,
u_int16_t, int);
struct pf_rule *pf_get_translation(struct pf_pdesc *, struct mbuf *,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
int, int, struct pfi_kif *, struct pf_src_node **,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_addr *, u_int16_t,
struct pf_addr *, u_int16_t,
struct pf_addr *, u_int16_t *);
int pf_test_tcp(struct pf_rule **, struct pf_state **,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
int, struct pfi_kif *, struct mbuf *, int,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
void *, struct pf_pdesc *, struct pf_rule **,
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
struct pf_ruleset **, struct inpcb *);
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_ruleset **);
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
int pf_test_udp(struct pf_rule **, struct pf_state **,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
int, struct pfi_kif *, struct mbuf *, int,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
void *, struct pf_pdesc *, struct pf_rule **,
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
struct pf_ruleset **, struct inpcb *);
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_ruleset **);
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
int pf_test_icmp(struct pf_rule **, struct pf_state **,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
int, struct pfi_kif *, struct mbuf *, int,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
void *, struct pf_pdesc *, struct pf_rule **,
struct pf_ruleset **);
int pf_test_other(struct pf_rule **, struct pf_state **,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
int, struct pfi_kif *, struct mbuf *, int, void *,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_pdesc *, struct pf_rule **,
struct pf_ruleset **);
int pf_test_fragment(struct pf_rule **, int,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pfi_kif *, struct mbuf *, void *,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_pdesc *, struct pf_rule **,
struct pf_ruleset **);
int pf_test_state_tcp(struct pf_state **, int,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pfi_kif *, struct mbuf *, int,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
void *, struct pf_pdesc *, u_short *);
int pf_test_state_udp(struct pf_state **, int,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pfi_kif *, struct mbuf *, int,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
void *, struct pf_pdesc *);
int pf_test_state_icmp(struct pf_state **, int,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pfi_kif *, struct mbuf *, int,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
void *, struct pf_pdesc *);
int pf_test_state_other(struct pf_state **, int,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pfi_kif *, struct pf_pdesc *);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_tag *pf_get_tag(struct mbuf *);
int pf_match_tag(struct mbuf *, struct pf_rule *,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_rule *, struct pf_tag *, int *);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
void pf_hash(struct pf_addr *, struct pf_addr *,
struct pf_poolhashkey *, sa_family_t);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
int pf_map_addr(u_int8_t, struct pf_rule *,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_addr *, struct pf_addr *,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_addr *, struct pf_src_node **);
int pf_get_sport(sa_family_t, u_int8_t, struct pf_rule *,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_addr *, struct pf_addr *, u_int16_t,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_addr *, u_int16_t*, u_int16_t, u_int16_t,
struct pf_src_node **);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
void pf_route(struct mbuf **, struct pf_rule *, int,
struct ifnet *, struct pf_state *);
void pf_route6(struct mbuf **, struct pf_rule *, int,
struct ifnet *, struct pf_state *);
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
int pf_socket_lookup(uid_t *, gid_t *,
int, struct pf_pdesc *, struct inpcb *);
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
int pf_socket_lookup(uid_t *, gid_t *,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
int, struct pf_pdesc *);
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
u_int8_t pf_get_wscale(struct mbuf *, int, u_int16_t,
sa_family_t);
u_int16_t pf_get_mss(struct mbuf *, int, u_int16_t,
sa_family_t);
u_int16_t pf_calc_mss(struct pf_addr *, sa_family_t,
u_int16_t);
void pf_set_rt_ifp(struct pf_state *,
struct pf_addr *);
int pf_check_proto_cksum(struct mbuf *, int, int,
u_int8_t, sa_family_t);
int pf_addr_wrap_neq(struct pf_addr_wrap *,
struct pf_addr_wrap *);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
static int pf_add_mbuf_tag(struct mbuf *, u_int);
struct pf_state *pf_find_state_recurse(struct pfi_kif *,
struct pf_state *, u_int8_t);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
int in4_cksum(struct mbuf *m, u_int8_t nxt, int off, int len);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
struct pf_pool_limit pf_pool_limits[PF_LIMIT_MAX];
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_pool_limit pf_pool_limits[PF_LIMIT_MAX] = {
{ &pf_state_pl, PFSTATE_HIWAT },
{ &pf_src_tree_pl, PFSNODE_HIWAT },
{ &pf_frent_pl, PFFRAG_FRENT_HIWAT }
};
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#define STATE_LOOKUP() \
do { \
if (direction == PF_IN) \
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
*state = pf_find_state_recurse( \
kif, &key, PF_EXT_GWY); \
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
else \
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
*state = pf_find_state_recurse( \
kif, &key, PF_LAN_EXT); \
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (*state == NULL) \
return (PF_DROP); \
if (direction == PF_OUT && \
(((*state)->rule.ptr->rt == PF_ROUTETO && \
(*state)->rule.ptr->direction == PF_OUT) || \
((*state)->rule.ptr->rt == PF_REPLYTO && \
(*state)->rule.ptr->direction == PF_IN)) && \
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
(*state)->rt_kif != NULL && \
(*state)->rt_kif != kif) \
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (PF_PASS); \
} while (0)
#define STATE_TRANSLATE(s) \
(s)->lan.addr.addr32[0] != (s)->gwy.addr.addr32[0] || \
((s)->af == AF_INET6 && \
((s)->lan.addr.addr32[1] != (s)->gwy.addr.addr32[1] || \
(s)->lan.addr.addr32[2] != (s)->gwy.addr.addr32[2] || \
(s)->lan.addr.addr32[3] != (s)->gwy.addr.addr32[3])) || \
(s)->lan.port != (s)->gwy.port
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#define BOUND_IFACE(r, k) (((r)->rule_flag & PFRULE_IFBOUND) ? (k) : \
((r)->rule_flag & PFRULE_GRBOUND) ? (k)->pfik_parent : \
(k)->pfik_parent->pfik_parent)
Initialize s variable early to shut up GCC warnings. Do not declare inline functions without body as this is useless in general and generates a warning with GCC 3.4.x. Glanced over by: dhartmei
2004-07-28 06:14:44 +00:00
#ifndef __FreeBSD__
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
static __inline int pf_src_compare(struct pf_src_node *, struct pf_src_node *);
static __inline int pf_state_compare_lan_ext(struct pf_state *,
struct pf_state *);
static __inline int pf_state_compare_ext_gwy(struct pf_state *,
struct pf_state *);
static __inline int pf_state_compare_id(struct pf_state *,
struct pf_state *);
Initialize s variable early to shut up GCC warnings. Do not declare inline functions without body as this is useless in general and generates a warning with GCC 3.4.x. Glanced over by: dhartmei
2004-07-28 06:14:44 +00:00
#else
static int pf_src_compare(struct pf_src_node *, struct pf_src_node *);
static int pf_state_compare_lan_ext(struct pf_state *,
struct pf_state *);
static int pf_state_compare_ext_gwy(struct pf_state *,
struct pf_state *);
static int pf_state_compare_id(struct pf_state *,
struct pf_state *);
#endif
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_src_tree tree_src_tracking;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state_tree_id tree_id;
struct pf_state_queue state_updates;
RB_GENERATE(pf_src_tree, pf_src_node, entry, pf_src_compare);
RB_GENERATE(pf_state_tree_lan_ext, pf_state,
u.s.entry_lan_ext, pf_state_compare_lan_ext);
RB_GENERATE(pf_state_tree_ext_gwy, pf_state,
u.s.entry_ext_gwy, pf_state_compare_ext_gwy);
RB_GENERATE(pf_state_tree_id, pf_state,
u.s.entry_id, pf_state_compare_id);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Remove __inline keyword from functions that can't be inlined according to LINT. This fixes LINT compliation for now, but needs to be revised. Changes do not affect the objects. Approved by: bms(mentor)
2004-02-29 16:34:43 +00:00
static int
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
static __inline int
Remove __inline keyword from functions that can't be inlined according to LINT. This fixes LINT compliation for now, but needs to be revised. Changes do not affect the objects. Approved by: bms(mentor)
2004-02-29 16:34:43 +00:00
#endif
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_src_compare(struct pf_src_node *a, struct pf_src_node *b)
{
int diff;
if (a->rule.ptr > b->rule.ptr)
return (1);
if (a->rule.ptr < b->rule.ptr)
return (-1);
if ((diff = a->af - b->af) != 0)
return (diff);
switch (a->af) {
#ifdef INET
case AF_INET:
if (a->addr.addr32[0] > b->addr.addr32[0])
return (1);
if (a->addr.addr32[0] < b->addr.addr32[0])
return (-1);
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
if (a->addr.addr32[3] > b->addr.addr32[3])
return (1);
if (a->addr.addr32[3] < b->addr.addr32[3])
return (-1);
if (a->addr.addr32[2] > b->addr.addr32[2])
return (1);
if (a->addr.addr32[2] < b->addr.addr32[2])
return (-1);
if (a->addr.addr32[1] > b->addr.addr32[1])
return (1);
if (a->addr.addr32[1] < b->addr.addr32[1])
return (-1);
if (a->addr.addr32[0] > b->addr.addr32[0])
return (1);
if (a->addr.addr32[0] < b->addr.addr32[0])
return (-1);
break;
#endif /* INET6 */
}
return (0);
}
#ifdef __FreeBSD__
static int
#else
static __inline int
#endif
pf_state_compare_lan_ext(struct pf_state *a, struct pf_state *b)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
int diff;
if ((diff = a->proto - b->proto) != 0)
return (diff);
if ((diff = a->af - b->af) != 0)
return (diff);
switch (a->af) {
#ifdef INET
case AF_INET:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->lan.addr.addr32[0] > b->lan.addr.addr32[0])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->lan.addr.addr32[0] < b->lan.addr.addr32[0])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (-1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (-1);
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->lan.addr.addr32[3] > b->lan.addr.addr32[3])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->lan.addr.addr32[3] < b->lan.addr.addr32[3])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (-1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->ext.addr.addr32[3] > b->ext.addr.addr32[3])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->ext.addr.addr32[3] < b->ext.addr.addr32[3])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (-1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->lan.addr.addr32[2] > b->lan.addr.addr32[2])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->lan.addr.addr32[2] < b->lan.addr.addr32[2])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (-1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->ext.addr.addr32[2] > b->ext.addr.addr32[2])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->ext.addr.addr32[2] < b->ext.addr.addr32[2])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (-1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->lan.addr.addr32[1] > b->lan.addr.addr32[1])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->lan.addr.addr32[1] < b->lan.addr.addr32[1])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (-1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->ext.addr.addr32[1] > b->ext.addr.addr32[1])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->ext.addr.addr32[1] < b->ext.addr.addr32[1])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (-1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->lan.addr.addr32[0] > b->lan.addr.addr32[0])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->lan.addr.addr32[0] < b->lan.addr.addr32[0])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (-1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0])
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (-1);
break;
#endif /* INET6 */
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if ((diff = a->lan.port - b->lan.port) != 0)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (diff);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if ((diff = a->ext.port - b->ext.port) != 0)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (diff);
return (0);
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#ifdef __FreeBSD__
static int
#else
static __inline int
#endif
pf_state_compare_ext_gwy(struct pf_state *a, struct pf_state *b)
{
int diff;
if ((diff = a->proto - b->proto) != 0)
return (diff);
if ((diff = a->af - b->af) != 0)
return (diff);
switch (a->af) {
#ifdef INET
case AF_INET:
if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0])
return (1);
if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0])
return (-1);
if (a->gwy.addr.addr32[0] > b->gwy.addr.addr32[0])
return (1);
if (a->gwy.addr.addr32[0] < b->gwy.addr.addr32[0])
return (-1);
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
if (a->ext.addr.addr32[3] > b->ext.addr.addr32[3])
return (1);
if (a->ext.addr.addr32[3] < b->ext.addr.addr32[3])
return (-1);
if (a->gwy.addr.addr32[3] > b->gwy.addr.addr32[3])
return (1);
if (a->gwy.addr.addr32[3] < b->gwy.addr.addr32[3])
return (-1);
if (a->ext.addr.addr32[2] > b->ext.addr.addr32[2])
return (1);
if (a->ext.addr.addr32[2] < b->ext.addr.addr32[2])
return (-1);
if (a->gwy.addr.addr32[2] > b->gwy.addr.addr32[2])
return (1);
if (a->gwy.addr.addr32[2] < b->gwy.addr.addr32[2])
return (-1);
if (a->ext.addr.addr32[1] > b->ext.addr.addr32[1])
return (1);
if (a->ext.addr.addr32[1] < b->ext.addr.addr32[1])
return (-1);
if (a->gwy.addr.addr32[1] > b->gwy.addr.addr32[1])
return (1);
if (a->gwy.addr.addr32[1] < b->gwy.addr.addr32[1])
return (-1);
if (a->ext.addr.addr32[0] > b->ext.addr.addr32[0])
return (1);
if (a->ext.addr.addr32[0] < b->ext.addr.addr32[0])
return (-1);
if (a->gwy.addr.addr32[0] > b->gwy.addr.addr32[0])
return (1);
if (a->gwy.addr.addr32[0] < b->gwy.addr.addr32[0])
return (-1);
break;
#endif /* INET6 */
}
if ((diff = a->ext.port - b->ext.port) != 0)
return (diff);
if ((diff = a->gwy.port - b->gwy.port) != 0)
return (diff);
return (0);
}
#ifdef __FreeBSD__
static int
#else
static __inline int
#endif
pf_state_compare_id(struct pf_state *a, struct pf_state *b)
{
if (a->id > b->id)
return (1);
if (a->id < b->id)
return (-1);
if (a->creatorid > b->creatorid)
return (1);
if (a->creatorid < b->creatorid)
return (-1);
return (0);
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#ifdef INET6
void
pf_addrcpy(struct pf_addr *dst, struct pf_addr *src, sa_family_t af)
{
switch (af) {
#ifdef INET
case AF_INET:
dst->addr32[0] = src->addr32[0];
break;
#endif /* INET */
case AF_INET6:
dst->addr32[0] = src->addr32[0];
dst->addr32[1] = src->addr32[1];
dst->addr32[2] = src->addr32[2];
dst->addr32[3] = src->addr32[3];
break;
}
}
#endif
struct pf_state *
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_find_state_byid(struct pf_state *key)
{
pf_status.fcounters[FCNT_STATE_SEARCH]++;
return (RB_FIND(pf_state_tree_id, &tree_id, key));
}
struct pf_state *
pf_find_state_recurse(struct pfi_kif *kif, struct pf_state *key, u_int8_t tree)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state *s;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pf_status.fcounters[FCNT_STATE_SEARCH]++;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
switch (tree) {
case PF_LAN_EXT:
for (; kif != NULL; kif = kif->pfik_parent) {
s = RB_FIND(pf_state_tree_lan_ext,
&kif->pfik_lan_ext, key);
if (s != NULL)
return (s);
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (NULL);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
case PF_EXT_GWY:
for (; kif != NULL; kif = kif->pfik_parent) {
s = RB_FIND(pf_state_tree_ext_gwy,
&kif->pfik_ext_gwy, key);
if (s != NULL)
return (s);
}
return (NULL);
default:
panic("pf_find_state_recurse");
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state *
pf_find_state_all(struct pf_state *key, u_int8_t tree, int *more)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state *s, *ss = NULL;
struct pfi_kif *kif;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_status.fcounters[FCNT_STATE_SEARCH]++;
switch (tree) {
case PF_LAN_EXT:
TAILQ_FOREACH(kif, &pfi_statehead, pfik_w_states) {
s = RB_FIND(pf_state_tree_lan_ext,
&kif->pfik_lan_ext, key);
if (s == NULL)
continue;
if (more == NULL)
return (s);
ss = s;
(*more)++;
}
return (ss);
case PF_EXT_GWY:
TAILQ_FOREACH(kif, &pfi_statehead, pfik_w_states) {
s = RB_FIND(pf_state_tree_ext_gwy,
&kif->pfik_ext_gwy, key);
if (s == NULL)
continue;
if (more == NULL)
return (s);
ss = s;
(*more)++;
}
return (ss);
default:
panic("pf_find_state_all");
}
}
int
pf_insert_src_node(struct pf_src_node **sn, struct pf_rule *rule,
struct pf_addr *src, sa_family_t af)
{
struct pf_src_node k;
if (*sn == NULL) {
k.af = af;
PF_ACPY(&k.addr, src, af);
if (rule->rule_flag & PFRULE_RULESRCTRACK ||
rule->rpool.opts & PF_POOL_STICKYADDR)
k.rule.ptr = rule;
else
k.rule.ptr = NULL;
pf_status.scounters[SCNT_SRC_NODE_SEARCH]++;
*sn = RB_FIND(pf_src_tree, &tree_src_tracking, &k);
}
if (*sn == NULL) {
if (!rule->max_src_nodes ||
rule->src_nodes < rule->max_src_nodes)
(*sn) = pool_get(&pf_src_tree_pl, PR_NOWAIT);
if ((*sn) == NULL)
return (-1);
bzero(*sn, sizeof(struct pf_src_node));
(*sn)->af = af;
if (rule->rule_flag & PFRULE_RULESRCTRACK ||
rule->rpool.opts & PF_POOL_STICKYADDR)
(*sn)->rule.ptr = rule;
else
(*sn)->rule.ptr = NULL;
PF_ACPY(&(*sn)->addr, src, af);
if (RB_INSERT(pf_src_tree,
&tree_src_tracking, *sn) != NULL) {
if (pf_status.debug >= PF_DEBUG_MISC) {
printf("pf: src_tree insert failed: ");
pf_print_host(&(*sn)->addr, 0, af);
printf("\n");
}
pool_put(&pf_src_tree_pl, *sn);
return (-1);
}
#ifdef __FreeBSD__
(*sn)->creation = time_second;
#else
(*sn)->creation = time.tv_sec;
#endif
(*sn)->ruletype = rule->action;
if ((*sn)->rule.ptr != NULL)
(*sn)->rule.ptr->src_nodes++;
pf_status.scounters[SCNT_SRC_NODE_INSERT]++;
pf_status.src_nodes++;
} else {
if (rule->max_src_states &&
(*sn)->states >= rule->max_src_states)
return (-1);
}
return (0);
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
int
pf_insert_state(struct pfi_kif *kif, struct pf_state *state)
{
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
/* Thou MUST NOT insert multiple duplicate keys */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
state->u.s.kif = kif;
if (RB_INSERT(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state)) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (pf_status.debug >= PF_DEBUG_MISC) {
printf("pf: state insert failed: tree_lan_ext");
printf(" lan: ");
pf_print_host(&state->lan.addr, state->lan.port,
state->af);
printf(" gwy: ");
pf_print_host(&state->gwy.addr, state->gwy.port,
state->af);
printf(" ext: ");
pf_print_host(&state->ext.addr, state->ext.port,
state->af);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (state->sync_flags & PFSTATE_FROMSYNC)
printf(" (from sync)");
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
printf("\n");
}
return (-1);
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (RB_INSERT(pf_state_tree_ext_gwy, &kif->pfik_ext_gwy, state)) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (pf_status.debug >= PF_DEBUG_MISC) {
printf("pf: state insert failed: tree_ext_gwy");
printf(" lan: ");
pf_print_host(&state->lan.addr, state->lan.port,
state->af);
printf(" gwy: ");
pf_print_host(&state->gwy.addr, state->gwy.port,
state->af);
printf(" ext: ");
pf_print_host(&state->ext.addr, state->ext.port,
state->af);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (state->sync_flags & PFSTATE_FROMSYNC)
printf(" (from sync)");
printf("\n");
}
RB_REMOVE(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state);
return (-1);
}
if (state->id == 0 && state->creatorid == 0) {
state->id = htobe64(pf_status.stateid++);
state->creatorid = pf_status.hostid;
}
if (RB_INSERT(pf_state_tree_id, &tree_id, state) != NULL) {
if (pf_status.debug >= PF_DEBUG_MISC) {
#ifdef __FreeBSD__
printf("pf: state insert failed: "
"id: %016llx creatorid: %08x",
(long long)be64toh(state->id),
ntohl(state->creatorid));
#else
printf("pf: state insert failed: "
"id: %016llx creatorid: %08x",
betoh64(state->id), ntohl(state->creatorid));
#endif
if (state->sync_flags & PFSTATE_FROMSYNC)
printf(" (from sync)");
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
printf("\n");
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
RB_REMOVE(pf_state_tree_lan_ext, &kif->pfik_lan_ext, state);
RB_REMOVE(pf_state_tree_ext_gwy, &kif->pfik_ext_gwy, state);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (-1);
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
TAILQ_INSERT_HEAD(&state_updates, state, u.s.entry_updates);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pf_status.fcounters[FCNT_STATE_INSERT]++;
pf_status.states++;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pfi_attach_state(kif);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#if NPFSYNC
pfsync_insert_state(state);
#endif
return (0);
}
void
pf_purge_timeout(void *arg)
{
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
struct callout *to = arg;
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct timeout *to = arg;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
int s;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_LOCK();
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s = splsoftnet();
pf_purge_expired_states();
pf_purge_expired_fragments();
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_purge_expired_src_nodes();
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
splx(s);
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_UNLOCK();
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
callout_reset(to, pf_default_rule.timeout[PFTM_INTERVAL] * hz,
pf_purge_timeout, to);
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
timeout_add(to, pf_default_rule.timeout[PFTM_INTERVAL] * hz);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
u_int32_t
pf_state_expires(const struct pf_state *state)
{
u_int32_t timeout;
u_int32_t start;
u_int32_t end;
u_int32_t states;
/* handle all PFTM_* > PFTM_MAX here */
if (state->timeout == PFTM_PURGE)
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
return (time_second);
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (time.tv_sec);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (state->timeout == PFTM_UNTIL_PACKET)
return (0);
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
KASSERT((state->timeout < PFTM_MAX),
("pf_state_expires: timeout > PFTM_MAX"));
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
KASSERT(state->timeout < PFTM_MAX);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
timeout = state->rule.ptr->timeout[state->timeout];
if (!timeout)
timeout = pf_default_rule.timeout[state->timeout];
start = state->rule.ptr->timeout[PFTM_ADAPTIVE_START];
if (start) {
end = state->rule.ptr->timeout[PFTM_ADAPTIVE_END];
states = state->rule.ptr->states;
} else {
start = pf_default_rule.timeout[PFTM_ADAPTIVE_START];
end = pf_default_rule.timeout[PFTM_ADAPTIVE_END];
states = pf_status.states;
}
if (end && states > start && start < end) {
if (states < end)
return (state->expire + timeout * (end - states) /
(end - start));
else
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
return (time_second);
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (time.tv_sec);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
return (state->expire + timeout);
}
void
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_purge_expired_src_nodes(void)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_src_node *cur, *next;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
for (cur = RB_MIN(pf_src_tree, &tree_src_tracking); cur; cur = next) {
next = RB_NEXT(pf_src_tree, &tree_src_tracking, cur);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (cur->states <= 0 && cur->expire <= time_second) {
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (cur->states <= 0 && cur->expire <= time.tv_sec) {
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (cur->rule.ptr != NULL) {
cur->rule.ptr->src_nodes--;
if (cur->rule.ptr->states <= 0 &&
cur->rule.ptr->max_src_nodes <= 0)
pf_rm_rule(NULL, cur->rule.ptr);
}
RB_REMOVE(pf_src_tree, &tree_src_tracking, cur);
pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++;
pf_status.src_nodes--;
pool_put(&pf_src_tree_pl, cur);
}
}
}
void
pf_src_tree_remove_state(struct pf_state *s)
{
u_int32_t timeout;
if (s->src_node != NULL) {
if (--s->src_node->states <= 0) {
timeout = s->rule.ptr->timeout[PFTM_SRC_NODE];
if (!timeout)
timeout =
pf_default_rule.timeout[PFTM_SRC_NODE];
#ifdef __FreeBSD__
s->src_node->expire = time_second + timeout;
#else
s->src_node->expire = time.tv_sec + timeout;
#endif
}
}
if (s->nat_src_node != s->src_node && s->nat_src_node != NULL) {
if (--s->nat_src_node->states <= 0) {
timeout = s->rule.ptr->timeout[PFTM_SRC_NODE];
if (!timeout)
timeout =
pf_default_rule.timeout[PFTM_SRC_NODE];
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
s->nat_src_node->expire = time_second + timeout;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
s->nat_src_node->expire = time.tv_sec + timeout;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
}
}
s->src_node = s->nat_src_node = NULL;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
void
pf_purge_expired_states(void)
{
struct pf_state *cur, *next;
for (cur = RB_MIN(pf_state_tree_id, &tree_id);
cur; cur = next) {
next = RB_NEXT(pf_state_tree_id, &tree_id, cur);
#ifdef __FreeBSD__
if (pf_state_expires(cur) <= time_second) {
#else
if (pf_state_expires(cur) <= time.tv_sec) {
#endif
if (cur->src.state == PF_TCPS_PROXY_DST)
pf_send_tcp(cur->rule.ptr, cur->af,
&cur->ext.addr, &cur->lan.addr,
cur->ext.port, cur->lan.port,
cur->src.seqhi, cur->src.seqlo + 1, 0,
TH_RST|TH_ACK, 0, 0);
RB_REMOVE(pf_state_tree_ext_gwy,
&cur->u.s.kif->pfik_ext_gwy, cur);
RB_REMOVE(pf_state_tree_lan_ext,
&cur->u.s.kif->pfik_lan_ext, cur);
RB_REMOVE(pf_state_tree_id, &tree_id, cur);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#if NPFSYNC
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pfsync_delete_state(cur);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#endif
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_src_tree_remove_state(cur);
if (--cur->rule.ptr->states <= 0 &&
cur->rule.ptr->src_nodes <= 0)
pf_rm_rule(NULL, cur->rule.ptr);
if (cur->nat_rule.ptr != NULL)
if (--cur->nat_rule.ptr->states <= 0 &&
cur->nat_rule.ptr->src_nodes <= 0)
pf_rm_rule(NULL, cur->nat_rule.ptr);
if (cur->anchor.ptr != NULL)
if (--cur->anchor.ptr->states <= 0)
pf_rm_rule(NULL, cur->anchor.ptr);
pf_normalize_tcp_cleanup(cur);
pfi_detach_state(cur->u.s.kif);
TAILQ_REMOVE(&state_updates, cur, u.s.entry_updates);
pool_put(&pf_state_pl, cur);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pf_status.fcounters[FCNT_STATE_REMOVALS]++;
pf_status.states--;
}
}
}
int
pf_tbladdr_setup(struct pf_ruleset *rs, struct pf_addr_wrap *aw)
{
if (aw->type != PF_ADDR_TABLE)
return (0);
if ((aw->p.tbl = pfr_attach_table(rs, aw->v.tblname)) == NULL)
return (1);
return (0);
}
void
pf_tbladdr_remove(struct pf_addr_wrap *aw)
{
if (aw->type != PF_ADDR_TABLE || aw->p.tbl == NULL)
return;
pfr_detach_table(aw->p.tbl);
aw->p.tbl = NULL;
}
void
pf_tbladdr_copyout(struct pf_addr_wrap *aw)
{
struct pfr_ktable *kt = aw->p.tbl;
if (aw->type != PF_ADDR_TABLE || kt == NULL)
return;
if (!(kt->pfrkt_flags & PFR_TFLAG_ACTIVE) && kt->pfrkt_root != NULL)
kt = kt->pfrkt_root;
aw->p.tbl = NULL;
aw->p.tblcnt = (kt->pfrkt_flags & PFR_TFLAG_ACTIVE) ?
kt->pfrkt_cnt : -1;
}
void
pf_print_host(struct pf_addr *addr, u_int16_t p, sa_family_t af)
{
switch (af) {
#ifdef INET
case AF_INET: {
u_int32_t a = ntohl(addr->addr32[0]);
printf("%u.%u.%u.%u", (a>>24)&255, (a>>16)&255,
(a>>8)&255, a&255);
if (p) {
p = ntohs(p);
printf(":%u", p);
}
break;
}
#endif /* INET */
#ifdef INET6
case AF_INET6: {
u_int16_t b;
u_int8_t i, curstart = 255, curend = 0,
maxstart = 0, maxend = 0;
for (i = 0; i < 8; i++) {
if (!addr->addr16[i]) {
if (curstart == 255)
curstart = i;
else
curend = i;
} else {
if (curstart) {
if ((curend - curstart) >
(maxend - maxstart)) {
maxstart = curstart;
maxend = curend;
curstart = 255;
}
}
}
}
for (i = 0; i < 8; i++) {
if (i >= maxstart && i <= maxend) {
if (maxend != 7) {
if (i == maxstart)
printf(":");
} else {
if (i == maxend)
printf(":");
}
} else {
b = ntohs(addr->addr16[i]);
printf("%x", b);
if (i < 7)
printf(":");
}
}
if (p) {
p = ntohs(p);
printf("[%u]", p);
}
break;
}
#endif /* INET6 */
}
}
void
pf_print_state(struct pf_state *s)
{
switch (s->proto) {
case IPPROTO_TCP:
printf("TCP ");
break;
case IPPROTO_UDP:
printf("UDP ");
break;
case IPPROTO_ICMP:
printf("ICMP ");
break;
case IPPROTO_ICMPV6:
printf("ICMPV6 ");
break;
default:
printf("%u ", s->proto);
break;
}
pf_print_host(&s->lan.addr, s->lan.port, s->af);
printf(" ");
pf_print_host(&s->gwy.addr, s->gwy.port, s->af);
printf(" ");
pf_print_host(&s->ext.addr, s->ext.port, s->af);
printf(" [lo=%u high=%u win=%u modulator=%u", s->src.seqlo,
s->src.seqhi, s->src.max_win, s->src.seqdiff);
if (s->src.wscale && s->dst.wscale)
printf(" wscale=%u", s->src.wscale & PF_WSCALE_MASK);
printf("]");
printf(" [lo=%u high=%u win=%u modulator=%u", s->dst.seqlo,
s->dst.seqhi, s->dst.max_win, s->dst.seqdiff);
if (s->src.wscale && s->dst.wscale)
printf(" wscale=%u", s->dst.wscale & PF_WSCALE_MASK);
printf("]");
printf(" %u:%u", s->src.state, s->dst.state);
}
void
pf_print_flags(u_int8_t f)
{
if (f)
printf(" ");
if (f & TH_FIN)
printf("F");
if (f & TH_SYN)
printf("S");
if (f & TH_RST)
printf("R");
if (f & TH_PUSH)
printf("P");
if (f & TH_ACK)
printf("A");
if (f & TH_URG)
printf("U");
if (f & TH_ECE)
printf("E");
if (f & TH_CWR)
printf("W");
}
#define PF_SET_SKIP_STEPS(i) \
do { \
while (head[i] != cur) { \
head[i]->skip[i].ptr = cur; \
head[i] = TAILQ_NEXT(head[i], entries); \
} \
} while (0)
void
pf_calc_skip_steps(struct pf_rulequeue *rules)
{
struct pf_rule *cur, *prev, *head[PF_SKIP_COUNT];
int i;
cur = TAILQ_FIRST(rules);
prev = cur;
for (i = 0; i < PF_SKIP_COUNT; ++i)
head[i] = cur;
while (cur != NULL) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (cur->kif != prev->kif || cur->ifnot != prev->ifnot)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
PF_SET_SKIP_STEPS(PF_SKIP_IFP);
if (cur->direction != prev->direction)
PF_SET_SKIP_STEPS(PF_SKIP_DIR);
if (cur->af != prev->af)
PF_SET_SKIP_STEPS(PF_SKIP_AF);
if (cur->proto != prev->proto)
PF_SET_SKIP_STEPS(PF_SKIP_PROTO);
if (cur->src.not != prev->src.not ||
pf_addr_wrap_neq(&cur->src.addr, &prev->src.addr))
PF_SET_SKIP_STEPS(PF_SKIP_SRC_ADDR);
if (cur->src.port[0] != prev->src.port[0] ||
cur->src.port[1] != prev->src.port[1] ||
cur->src.port_op != prev->src.port_op)
PF_SET_SKIP_STEPS(PF_SKIP_SRC_PORT);
if (cur->dst.not != prev->dst.not ||
pf_addr_wrap_neq(&cur->dst.addr, &prev->dst.addr))
PF_SET_SKIP_STEPS(PF_SKIP_DST_ADDR);
if (cur->dst.port[0] != prev->dst.port[0] ||
cur->dst.port[1] != prev->dst.port[1] ||
cur->dst.port_op != prev->dst.port_op)
PF_SET_SKIP_STEPS(PF_SKIP_DST_PORT);
prev = cur;
cur = TAILQ_NEXT(cur, entries);
}
for (i = 0; i < PF_SKIP_COUNT; ++i)
PF_SET_SKIP_STEPS(i);
}
int
pf_addr_wrap_neq(struct pf_addr_wrap *aw1, struct pf_addr_wrap *aw2)
{
if (aw1->type != aw2->type)
return (1);
switch (aw1->type) {
case PF_ADDR_ADDRMASK:
if (PF_ANEQ(&aw1->v.a.addr, &aw2->v.a.addr, 0))
return (1);
if (PF_ANEQ(&aw1->v.a.mask, &aw2->v.a.mask, 0))
return (1);
return (0);
case PF_ADDR_DYNIFTL:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
return (aw1->p.dyn->pfid_kt != aw2->p.dyn->pfid_kt);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
case PF_ADDR_NOROUTE:
return (0);
case PF_ADDR_TABLE:
return (aw1->p.tbl != aw2->p.tbl);
default:
printf("invalid address type: %d\n", aw1->type);
return (1);
}
}
void
pf_update_anchor_rules()
{
struct pf_rule *rule;
int i;
for (i = 0; i < PF_RULESET_MAX; ++i)
TAILQ_FOREACH(rule, pf_main_ruleset.rules[i].active.ptr,
entries)
if (rule->anchorname[0])
rule->anchor = pf_find_anchor(rule->anchorname);
else
rule->anchor = NULL;
}
u_int16_t
pf_cksum_fixup(u_int16_t cksum, u_int16_t old, u_int16_t new, u_int8_t udp)
{
u_int32_t l;
if (udp && !cksum)
return (0x0000);
l = cksum + old - new;
l = (l >> 16) + (l & 65535);
l = l & 65535;
if (udp && !l)
return (0xFFFF);
return (l);
}
void
pf_change_ap(struct pf_addr *a, u_int16_t *p, u_int16_t *ic, u_int16_t *pc,
struct pf_addr *an, u_int16_t pn, u_int8_t u, sa_family_t af)
{
struct pf_addr ao;
u_int16_t po = *p;
PF_ACPY(&ao, a, af);
PF_ACPY(a, an, af);
*p = pn;
switch (af) {
#ifdef INET
case AF_INET:
*ic = pf_cksum_fixup(pf_cksum_fixup(*ic,
ao.addr16[0], an->addr16[0], 0),
ao.addr16[1], an->addr16[1], 0);
*p = pn;
*pc = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(*pc,
ao.addr16[0], an->addr16[0], u),
ao.addr16[1], an->addr16[1], u),
po, pn, u);
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
*pc = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(
pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(
pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(*pc,
ao.addr16[0], an->addr16[0], u),
ao.addr16[1], an->addr16[1], u),
ao.addr16[2], an->addr16[2], u),
ao.addr16[3], an->addr16[3], u),
ao.addr16[4], an->addr16[4], u),
ao.addr16[5], an->addr16[5], u),
ao.addr16[6], an->addr16[6], u),
ao.addr16[7], an->addr16[7], u),
po, pn, u);
break;
#endif /* INET6 */
}
}
/* Changes a u_int32_t. Uses a void * so there are no align restrictions */
void
pf_change_a(void *a, u_int16_t *c, u_int32_t an, u_int8_t u)
{
u_int32_t ao;
memcpy(&ao, a, sizeof(ao));
memcpy(a, &an, sizeof(u_int32_t));
*c = pf_cksum_fixup(pf_cksum_fixup(*c, ao / 65536, an / 65536, u),
ao % 65536, an % 65536, u);
}
#ifdef INET6
void
pf_change_a6(struct pf_addr *a, u_int16_t *c, struct pf_addr *an, u_int8_t u)
{
struct pf_addr ao;
PF_ACPY(&ao, a, AF_INET6);
PF_ACPY(a, an, AF_INET6);
*c = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(
pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(
pf_cksum_fixup(pf_cksum_fixup(*c,
ao.addr16[0], an->addr16[0], u),
ao.addr16[1], an->addr16[1], u),
ao.addr16[2], an->addr16[2], u),
ao.addr16[3], an->addr16[3], u),
ao.addr16[4], an->addr16[4], u),
ao.addr16[5], an->addr16[5], u),
ao.addr16[6], an->addr16[6], u),
ao.addr16[7], an->addr16[7], u);
}
#endif /* INET6 */
void
pf_change_icmp(struct pf_addr *ia, u_int16_t *ip, struct pf_addr *oa,
struct pf_addr *na, u_int16_t np, u_int16_t *pc, u_int16_t *h2c,
u_int16_t *ic, u_int16_t *hc, u_int8_t u, sa_family_t af)
{
struct pf_addr oia, ooa;
PF_ACPY(&oia, ia, af);
PF_ACPY(&ooa, oa, af);
/* Change inner protocol port, fix inner protocol checksum. */
if (ip != NULL) {
u_int16_t oip = *ip;
Shut up a couple of annoying gcc warnings. Do not enclose the fixes with #ifdefs in order to loop it back to OpenBSD after the next import. There are a some implicit asserts involved which might be better spelled out explicitly (af == AF_INET ...) Approved by: bms(mentor)
2004-03-30 18:28:30 +00:00
u_int32_t opc = 0; /* make the compiler happy */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (pc != NULL)
opc = *pc;
*ip = np;
if (pc != NULL)
*pc = pf_cksum_fixup(*pc, oip, *ip, u);
*ic = pf_cksum_fixup(*ic, oip, *ip, 0);
if (pc != NULL)
*ic = pf_cksum_fixup(*ic, opc, *pc, 0);
}
/* Change inner ip address, fix inner ip and icmp checksums. */
PF_ACPY(ia, na, af);
switch (af) {
#ifdef INET
case AF_INET: {
u_int32_t oh2c = *h2c;
*h2c = pf_cksum_fixup(pf_cksum_fixup(*h2c,
oia.addr16[0], ia->addr16[0], 0),
oia.addr16[1], ia->addr16[1], 0);
*ic = pf_cksum_fixup(pf_cksum_fixup(*ic,
oia.addr16[0], ia->addr16[0], 0),
oia.addr16[1], ia->addr16[1], 0);
*ic = pf_cksum_fixup(*ic, oh2c, *h2c, 0);
break;
}
#endif /* INET */
#ifdef INET6
case AF_INET6:
*ic = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(
pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(
pf_cksum_fixup(pf_cksum_fixup(*ic,
oia.addr16[0], ia->addr16[0], u),
oia.addr16[1], ia->addr16[1], u),
oia.addr16[2], ia->addr16[2], u),
oia.addr16[3], ia->addr16[3], u),
oia.addr16[4], ia->addr16[4], u),
oia.addr16[5], ia->addr16[5], u),
oia.addr16[6], ia->addr16[6], u),
oia.addr16[7], ia->addr16[7], u);
break;
#endif /* INET6 */
}
/* Change outer ip address, fix outer ip or icmpv6 checksum. */
PF_ACPY(oa, na, af);
switch (af) {
#ifdef INET
case AF_INET:
*hc = pf_cksum_fixup(pf_cksum_fixup(*hc,
ooa.addr16[0], oa->addr16[0], 0),
ooa.addr16[1], oa->addr16[1], 0);
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
*ic = pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(
pf_cksum_fixup(pf_cksum_fixup(pf_cksum_fixup(
pf_cksum_fixup(pf_cksum_fixup(*ic,
ooa.addr16[0], oa->addr16[0], u),
ooa.addr16[1], oa->addr16[1], u),
ooa.addr16[2], oa->addr16[2], u),
ooa.addr16[3], oa->addr16[3], u),
ooa.addr16[4], oa->addr16[4], u),
ooa.addr16[5], oa->addr16[5], u),
ooa.addr16[6], oa->addr16[6], u),
ooa.addr16[7], oa->addr16[7], u);
break;
#endif /* INET6 */
}
}
void
pf_send_tcp(const struct pf_rule *r, sa_family_t af,
const struct pf_addr *saddr, const struct pf_addr *daddr,
u_int16_t sport, u_int16_t dport, u_int32_t seq, u_int32_t ack,
u_int8_t flags, u_int16_t win, u_int16_t mss, u_int8_t ttl)
{
struct mbuf *m;
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
#ifdef ALTQ
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct m_tag *mtag;
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
#endif
Shut up a couple of annoying gcc warnings. Do not enclose the fixes with #ifdefs in order to loop it back to OpenBSD after the next import. There are a some implicit asserts involved which might be better spelled out explicitly (af == AF_INET ...) Approved by: bms(mentor)
2004-03-30 18:28:30 +00:00
int len = 0, tlen; /* make the compiler happy */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#ifdef INET
Shut up a couple of annoying gcc warnings. Do not enclose the fixes with #ifdefs in order to loop it back to OpenBSD after the next import. There are a some implicit asserts involved which might be better spelled out explicitly (af == AF_INET ...) Approved by: bms(mentor)
2004-03-30 18:28:30 +00:00
struct ip *h = NULL; /* make the compiler happy */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#endif /* INET */
#ifdef INET6
Shut up a couple of annoying gcc warnings. Do not enclose the fixes with #ifdefs in order to loop it back to OpenBSD after the next import. There are a some implicit asserts involved which might be better spelled out explicitly (af == AF_INET ...) Approved by: bms(mentor)
2004-03-30 18:28:30 +00:00
struct ip6_hdr *h6 = NULL; /* make the compiler happy */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#endif /* INET6 */
Shut up a couple of annoying gcc warnings. Do not enclose the fixes with #ifdefs in order to loop it back to OpenBSD after the next import. There are a some implicit asserts involved which might be better spelled out explicitly (af == AF_INET ...) Approved by: bms(mentor)
2004-03-30 18:28:30 +00:00
struct tcphdr *th = NULL; /* make the compiler happy */
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
struct ip *ip;
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
char *opt;
/* maximum segment size tcp option */
tlen = sizeof(struct tcphdr);
if (mss)
tlen += 4;
switch (af) {
#ifdef INET
case AF_INET:
len = sizeof(struct ip) + tlen;
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
len = sizeof(struct ip6_hdr) + tlen;
break;
#endif /* INET6 */
}
/* create outgoing mbuf */
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
#ifdef __FreeBSD__
m = m_gethdr(M_DONTWAIT, MT_HEADER);
if (m == NULL)
return;
m->m_flags |= M_SKIP_FIREWALL;
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
mtag = m_tag_get(PACKET_TAG_PF_GENERATED, 0, M_NOWAIT);
if (mtag == NULL)
return;
m = m_gethdr(M_DONTWAIT, MT_HEADER);
if (m == NULL) {
m_tag_free(mtag);
return;
}
m_tag_prepend(m, mtag);
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#ifdef ALTQ
if (r != NULL && r->qid) {
struct altq_tag *atag;
mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT);
if (mtag != NULL) {
atag = (struct altq_tag *)(mtag + 1);
atag->qid = r->qid;
/* add hints for ecn */
atag->af = af;
atag->hdr = mtod(m, struct ip *);
m_tag_prepend(m, mtag);
}
}
#endif
m->m_data += max_linkhdr;
m->m_pkthdr.len = m->m_len = len;
m->m_pkthdr.rcvif = NULL;
bzero(m->m_data, len);
switch (af) {
#ifdef INET
case AF_INET:
h = mtod(m, struct ip *);
/* IP header fields included in the TCP checksum */
h->ip_p = IPPROTO_TCP;
h->ip_len = htons(tlen);
h->ip_src.s_addr = saddr->v4.s_addr;
h->ip_dst.s_addr = daddr->v4.s_addr;
th = (struct tcphdr *)((caddr_t)h + sizeof(struct ip));
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
h6 = mtod(m, struct ip6_hdr *);
/* IP header fields included in the TCP checksum */
h6->ip6_nxt = IPPROTO_TCP;
h6->ip6_plen = htons(tlen);
memcpy(&h6->ip6_src, &saddr->v6, sizeof(struct in6_addr));
memcpy(&h6->ip6_dst, &daddr->v6, sizeof(struct in6_addr));
th = (struct tcphdr *)((caddr_t)h6 + sizeof(struct ip6_hdr));
break;
#endif /* INET6 */
}
/* TCP header */
th->th_sport = sport;
th->th_dport = dport;
th->th_seq = htonl(seq);
th->th_ack = htonl(ack);
th->th_off = tlen >> 2;
th->th_flags = flags;
th->th_win = htons(win);
if (mss) {
opt = (char *)(th + 1);
opt[0] = TCPOPT_MAXSEG;
opt[1] = 4;
HTONS(mss);
bcopy((caddr_t)&mss, (caddr_t)(opt + 2), 2);
}
switch (af) {
#ifdef INET
case AF_INET:
/* TCP checksum */
th->th_sum = in_cksum(m, len);
/* Finish the IP header */
h->ip_v = 4;
h->ip_hl = sizeof(*h) >> 2;
h->ip_tos = IPTOS_LOWDELAY;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
h->ip_off = path_mtu_discovery ? IP_DF : 0;
h->ip_len = len;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
h->ip_off = htons(ip_mtudisc ? IP_DF : 0);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
h->ip_len = htons(len);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
h->ip_ttl = ttl ? ttl : ip_defttl;
h->ip_sum = 0;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
ip = mtod(m, struct ip *);
PF_UNLOCK();
ip_output(m, (void *)NULL, (void *)NULL, 0, (void *)NULL,
(void *)NULL);
PF_LOCK();
#else /* ! __FreeBSD__ */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
ip_output(m, (void *)NULL, (void *)NULL, 0, (void *)NULL,
(void *)NULL);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
/* TCP checksum */
th->th_sum = in6_cksum(m, IPPROTO_TCP,
sizeof(struct ip6_hdr), tlen);
h6->ip6_vfc |= IPV6_VERSION;
h6->ip6_hlim = IPV6_DEFHLIM;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_UNLOCK();
ip6_output(m, NULL, NULL, 0, NULL, NULL, NULL);
PF_LOCK();
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
ip6_output(m, NULL, NULL, 0, NULL, NULL);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET6 */
}
}
void
pf_send_icmp(struct mbuf *m, u_int8_t type, u_int8_t code, sa_family_t af,
struct pf_rule *r)
{
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
#ifdef ALTQ
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct m_tag *mtag;
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct mbuf *m0;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
struct ip *ip;
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
m0 = m_copypacket(m, M_DONTWAIT);
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
if (m0 == NULL)
return;
m0->m_flags |= M_SKIP_FIREWALL;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#else
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
mtag = m_tag_get(PACKET_TAG_PF_GENERATED, 0, M_NOWAIT);
if (mtag == NULL)
return;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
m0 = m_copy(m, 0, M_COPYALL);
if (m0 == NULL) {
m_tag_free(mtag);
return;
}
m_tag_prepend(m0, mtag);
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#ifdef ALTQ
if (r->qid) {
struct altq_tag *atag;
mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT);
if (mtag != NULL) {
atag = (struct altq_tag *)(mtag + 1);
atag->qid = r->qid;
/* add hints for ecn */
atag->af = af;
atag->hdr = mtod(m0, struct ip *);
m_tag_prepend(m0, mtag);
}
}
#endif
switch (af) {
#ifdef INET
case AF_INET:
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
/* icmp_error() expects host byte ordering */
ip = mtod(m0, struct ip *);
NTOHS(ip->ip_len);
NTOHS(ip->ip_off);
PF_UNLOCK();
#endif
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
icmp_error(m0, type, code, 0, (void *)NULL);
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_LOCK();
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_UNLOCK();
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
icmp6_error(m0, type, code, 0);
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_LOCK();
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET6 */
}
}
/*
* Return 1 if the addresses a and b match (with mask m), otherwise return 0.
* If n is 0, they match if they are equal. If n is != 0, they match if they
* are different.
*/
int
pf_match_addr(u_int8_t n, struct pf_addr *a, struct pf_addr *m,
struct pf_addr *b, sa_family_t af)
{
int match = 0;
switch (af) {
#ifdef INET
case AF_INET:
if ((a->addr32[0] & m->addr32[0]) ==
(b->addr32[0] & m->addr32[0]))
match++;
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
if (((a->addr32[0] & m->addr32[0]) ==
(b->addr32[0] & m->addr32[0])) &&
((a->addr32[1] & m->addr32[1]) ==
(b->addr32[1] & m->addr32[1])) &&
((a->addr32[2] & m->addr32[2]) ==
(b->addr32[2] & m->addr32[2])) &&
((a->addr32[3] & m->addr32[3]) ==
(b->addr32[3] & m->addr32[3])))
match++;
break;
#endif /* INET6 */
}
if (match) {
if (n)
return (0);
else
return (1);
} else {
if (n)
return (1);
else
return (0);
}
}
int
pf_match(u_int8_t op, u_int32_t a1, u_int32_t a2, u_int32_t p)
{
switch (op) {
case PF_OP_IRG:
return ((p > a1) && (p < a2));
case PF_OP_XRG:
return ((p < a1) || (p > a2));
case PF_OP_RRG:
return ((p >= a1) && (p <= a2));
case PF_OP_EQ:
return (p == a1);
case PF_OP_NE:
return (p != a1);
case PF_OP_LT:
return (p < a1);
case PF_OP_LE:
return (p <= a1);
case PF_OP_GT:
return (p > a1);
case PF_OP_GE:
return (p >= a1);
}
return (0); /* never reached */
}
int
pf_match_port(u_int8_t op, u_int16_t a1, u_int16_t a2, u_int16_t p)
{
NTOHS(a1);
NTOHS(a2);
NTOHS(p);
return (pf_match(op, a1, a2, p));
}
int
pf_match_uid(u_int8_t op, uid_t a1, uid_t a2, uid_t u)
{
if (u == UID_MAX && op != PF_OP_EQ && op != PF_OP_NE)
return (0);
return (pf_match(op, a1, a2, u));
}
int
pf_match_gid(u_int8_t op, gid_t a1, gid_t a2, gid_t g)
{
if (g == GID_MAX && op != PF_OP_EQ && op != PF_OP_NE)
return (0);
return (pf_match(op, a1, a2, g));
}
struct pf_tag *
pf_get_tag(struct mbuf *m)
{
struct m_tag *mtag;
if ((mtag = m_tag_find(m, PACKET_TAG_PF_TAG, NULL)) != NULL)
return ((struct pf_tag *)(mtag + 1));
else
return (NULL);
}
int
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_match_tag(struct mbuf *m, struct pf_rule *r, struct pf_rule *nat_rule,
struct pf_tag *pftag, int *tag)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
if (*tag == -1) { /* find mbuf tag */
pftag = pf_get_tag(m);
if (pftag != NULL)
*tag = pftag->tag;
else
*tag = 0;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nat_rule != NULL && nat_rule->tag)
*tag = nat_rule->tag;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
return ((!r->match_tag_not && r->match_tag == *tag) ||
(r->match_tag_not && r->match_tag != *tag));
}
int
pf_tag_packet(struct mbuf *m, struct pf_tag *pftag, int tag)
{
struct m_tag *mtag;
if (tag <= 0)
return (0);
if (pftag == NULL) {
mtag = m_tag_get(PACKET_TAG_PF_TAG, sizeof(*pftag), M_NOWAIT);
if (mtag == NULL)
return (1);
((struct pf_tag *)(mtag + 1))->tag = tag;
m_tag_prepend(m, mtag);
} else
pftag->tag = tag;
return (0);
}
#define PF_STEP_INTO_ANCHOR(r, a, s, n) \
do { \
if ((r) == NULL || (r)->anchor == NULL || \
(s) != NULL || (a) != NULL) \
panic("PF_STEP_INTO_ANCHOR"); \
(a) = (r); \
(s) = TAILQ_FIRST(&(r)->anchor->rulesets); \
(r) = NULL; \
while ((s) != NULL && ((r) = \
TAILQ_FIRST((s)->rules[n].active.ptr)) == NULL) \
(s) = TAILQ_NEXT((s), entries); \
if ((r) == NULL) { \
(r) = TAILQ_NEXT((a), entries); \
(a) = NULL; \
} \
} while (0)
#define PF_STEP_OUT_OF_ANCHOR(r, a, s, n) \
do { \
if ((r) != NULL || (a) == NULL || (s) == NULL) \
panic("PF_STEP_OUT_OF_ANCHOR"); \
(s) = TAILQ_NEXT((s), entries); \
while ((s) != NULL && ((r) = \
TAILQ_FIRST((s)->rules[n].active.ptr)) == NULL) \
(s) = TAILQ_NEXT((s), entries); \
if ((r) == NULL) { \
(r) = TAILQ_NEXT((a), entries); \
(a) = NULL; \
} \
} while (0)
#ifdef INET6
void
pf_poolmask(struct pf_addr *naddr, struct pf_addr *raddr,
struct pf_addr *rmask, struct pf_addr *saddr, sa_family_t af)
{
switch (af) {
#ifdef INET
case AF_INET:
naddr->addr32[0] = (raddr->addr32[0] & rmask->addr32[0]) |
((rmask->addr32[0] ^ 0xffffffff ) & saddr->addr32[0]);
break;
#endif /* INET */
case AF_INET6:
naddr->addr32[0] = (raddr->addr32[0] & rmask->addr32[0]) |
((rmask->addr32[0] ^ 0xffffffff ) & saddr->addr32[0]);
naddr->addr32[1] = (raddr->addr32[1] & rmask->addr32[1]) |
((rmask->addr32[1] ^ 0xffffffff ) & saddr->addr32[1]);
naddr->addr32[2] = (raddr->addr32[2] & rmask->addr32[2]) |
((rmask->addr32[2] ^ 0xffffffff ) & saddr->addr32[2]);
naddr->addr32[3] = (raddr->addr32[3] & rmask->addr32[3]) |
((rmask->addr32[3] ^ 0xffffffff ) & saddr->addr32[3]);
break;
}
}
void
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_addr_inc(struct pf_addr *addr, sa_family_t af)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
switch (af) {
#ifdef INET
case AF_INET:
addr->addr32[0] = htonl(ntohl(addr->addr32[0]) + 1);
break;
#endif /* INET */
case AF_INET6:
if (addr->addr32[3] == 0xffffffff) {
addr->addr32[3] = 0;
if (addr->addr32[2] == 0xffffffff) {
addr->addr32[2] = 0;
if (addr->addr32[1] == 0xffffffff) {
addr->addr32[1] = 0;
addr->addr32[0] =
htonl(ntohl(addr->addr32[0]) + 1);
} else
addr->addr32[1] =
htonl(ntohl(addr->addr32[1]) + 1);
} else
addr->addr32[2] =
htonl(ntohl(addr->addr32[2]) + 1);
} else
addr->addr32[3] =
htonl(ntohl(addr->addr32[3]) + 1);
break;
}
}
#endif /* INET6 */
#define mix(a,b,c) \
do { \
a -= b; a -= c; a ^= (c >> 13); \
b -= c; b -= a; b ^= (a << 8); \
c -= a; c -= b; c ^= (b >> 13); \
a -= b; a -= c; a ^= (c >> 12); \
b -= c; b -= a; b ^= (a << 16); \
c -= a; c -= b; c ^= (b >> 5); \
a -= b; a -= c; a ^= (c >> 3); \
b -= c; b -= a; b ^= (a << 10); \
c -= a; c -= b; c ^= (b >> 15); \
} while (0)
/*
* hash function based on bridge_hash in if_bridge.c
*/
void
pf_hash(struct pf_addr *inaddr, struct pf_addr *hash,
struct pf_poolhashkey *key, sa_family_t af)
{
u_int32_t a = 0x9e3779b9, b = 0x9e3779b9, c = key->key32[0];
switch (af) {
#ifdef INET
case AF_INET:
a += inaddr->addr32[0];
b += key->key32[1];
mix(a, b, c);
hash->addr32[0] = c + key->key32[2];
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
a += inaddr->addr32[0];
b += inaddr->addr32[2];
mix(a, b, c);
hash->addr32[0] = c;
a += inaddr->addr32[1];
b += inaddr->addr32[3];
c += key->key32[1];
mix(a, b, c);
hash->addr32[1] = c;
a += inaddr->addr32[2];
b += inaddr->addr32[1];
c += key->key32[2];
mix(a, b, c);
hash->addr32[2] = c;
a += inaddr->addr32[3];
b += inaddr->addr32[0];
c += key->key32[3];
mix(a, b, c);
hash->addr32[3] = c;
break;
#endif /* INET6 */
}
}
int
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_map_addr(sa_family_t af, struct pf_rule *r, struct pf_addr *saddr,
struct pf_addr *naddr, struct pf_addr *init_addr, struct pf_src_node **sn)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
unsigned char hash[16];
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_pool *rpool = &r->rpool;
struct pf_addr *raddr = &rpool->cur->addr.v.a.addr;
struct pf_addr *rmask = &rpool->cur->addr.v.a.mask;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_pooladdr *acur = rpool->cur;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_src_node k;
if (*sn == NULL && r->rpool.opts & PF_POOL_STICKYADDR &&
(r->rpool.opts & PF_POOL_TYPEMASK) != PF_POOL_NONE) {
k.af = af;
PF_ACPY(&k.addr, saddr, af);
if (r->rule_flag & PFRULE_RULESRCTRACK ||
r->rpool.opts & PF_POOL_STICKYADDR)
k.rule.ptr = r;
else
k.rule.ptr = NULL;
pf_status.scounters[SCNT_SRC_NODE_SEARCH]++;
*sn = RB_FIND(pf_src_tree, &tree_src_tracking, &k);
if (*sn != NULL && !PF_AZERO(&(*sn)->raddr, af)) {
PF_ACPY(naddr, &(*sn)->raddr, af);
if (pf_status.debug >= PF_DEBUG_MISC) {
printf("pf_map_addr: src tracking maps ");
pf_print_host(&k.addr, 0, af);
printf(" to ");
pf_print_host(naddr, 0, af);
printf("\n");
}
return (0);
}
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (rpool->cur->addr.type == PF_ADDR_NOROUTE)
return (1);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) {
if (af == AF_INET) {
if (rpool->cur->addr.p.dyn->pfid_acnt4 < 1 &&
(rpool->opts & PF_POOL_TYPEMASK) !=
PF_POOL_ROUNDROBIN)
return (1);
raddr = &rpool->cur->addr.p.dyn->pfid_addr4;
rmask = &rpool->cur->addr.p.dyn->pfid_mask4;
} else {
if (rpool->cur->addr.p.dyn->pfid_acnt6 < 1 &&
(rpool->opts & PF_POOL_TYPEMASK) !=
PF_POOL_ROUNDROBIN)
return (1);
raddr = &rpool->cur->addr.p.dyn->pfid_addr6;
rmask = &rpool->cur->addr.p.dyn->pfid_mask6;
}
} else if (rpool->cur->addr.type == PF_ADDR_TABLE) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if ((rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_ROUNDROBIN)
return (1); /* unsupported */
} else {
raddr = &rpool->cur->addr.v.a.addr;
rmask = &rpool->cur->addr.v.a.mask;
}
switch (rpool->opts & PF_POOL_TYPEMASK) {
case PF_POOL_NONE:
PF_ACPY(naddr, raddr, af);
break;
case PF_POOL_BITMASK:
PF_POOLMASK(naddr, raddr, rmask, saddr, af);
break;
case PF_POOL_RANDOM:
if (init_addr != NULL && PF_AZERO(init_addr, af)) {
switch (af) {
#ifdef INET
case AF_INET:
rpool->counter.addr32[0] = arc4random();
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
if (rmask->addr32[3] != 0xffffffff)
rpool->counter.addr32[3] = arc4random();
else
break;
if (rmask->addr32[2] != 0xffffffff)
rpool->counter.addr32[2] = arc4random();
else
break;
if (rmask->addr32[1] != 0xffffffff)
rpool->counter.addr32[1] = arc4random();
else
break;
if (rmask->addr32[0] != 0xffffffff)
rpool->counter.addr32[0] = arc4random();
break;
#endif /* INET6 */
}
PF_POOLMASK(naddr, raddr, rmask, &rpool->counter, af);
PF_ACPY(init_addr, naddr, af);
} else {
PF_AINC(&rpool->counter, af);
PF_POOLMASK(naddr, raddr, rmask, &rpool->counter, af);
}
break;
case PF_POOL_SRCHASH:
pf_hash(saddr, (struct pf_addr *)&hash, &rpool->key, af);
PF_POOLMASK(naddr, raddr, rmask, (struct pf_addr *)&hash, af);
break;
case PF_POOL_ROUNDROBIN:
if (rpool->cur->addr.type == PF_ADDR_TABLE) {
if (!pfr_pool_get(rpool->cur->addr.p.tbl,
&rpool->tblidx, &rpool->counter,
&raddr, &rmask, af))
goto get_addr;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
} else if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) {
if (!pfr_pool_get(rpool->cur->addr.p.dyn->pfid_kt,
&rpool->tblidx, &rpool->counter,
&raddr, &rmask, af))
goto get_addr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
} else if (pf_match_addr(0, raddr, rmask, &rpool->counter, af))
goto get_addr;
try_next:
if ((rpool->cur = TAILQ_NEXT(rpool->cur, entries)) == NULL)
rpool->cur = TAILQ_FIRST(&rpool->list);
if (rpool->cur->addr.type == PF_ADDR_TABLE) {
rpool->tblidx = -1;
if (pfr_pool_get(rpool->cur->addr.p.tbl,
&rpool->tblidx, &rpool->counter,
&raddr, &rmask, af)) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
/* table contains no address of type 'af' */
if (rpool->cur != acur)
goto try_next;
return (1);
}
} else if (rpool->cur->addr.type == PF_ADDR_DYNIFTL) {
rpool->tblidx = -1;
if (pfr_pool_get(rpool->cur->addr.p.dyn->pfid_kt,
&rpool->tblidx, &rpool->counter,
&raddr, &rmask, af)) {
/* table contains no address of type 'af' */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (rpool->cur != acur)
goto try_next;
return (1);
}
} else {
raddr = &rpool->cur->addr.v.a.addr;
rmask = &rpool->cur->addr.v.a.mask;
PF_ACPY(&rpool->counter, raddr, af);
}
get_addr:
PF_ACPY(naddr, &rpool->counter, af);
Initialise init_addr in pf_map_addr() in the PF_POOL_ROUNDROBIN, prevents a possible endless loop in pf_get_sport() with 'static-port' ICMP state entries use the ICMP ID as port for the unique state key. When checking for a usable key, construct the key in the same way. Otherwise, a colliding key might be missed or a state insertion might be refused even though it could be inserted. The second case triggers the endless loop, possibly allowing a NATed LAN client to lock up the kernel. PR: kern/74930 Reported and tested by: Hugo Silva, Srebrenko Sehic MFC after: 3 days
2004-12-19 19:43:04 +00:00
if (init_addr != NULL && PF_AZERO(init_addr, af))
PF_ACPY(init_addr, naddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
PF_AINC(&rpool->counter, af);
break;
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (*sn != NULL)
PF_ACPY(&(*sn)->raddr, naddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (pf_status.debug >= PF_DEBUG_MISC &&
(rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_NONE) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
printf("pf_map_addr: selected address ");
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pf_print_host(naddr, 0, af);
printf("\n");
}
return (0);
}
int
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_get_sport(sa_family_t af, u_int8_t proto, struct pf_rule *r,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_addr *saddr, struct pf_addr *daddr, u_int16_t dport,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_addr *naddr, u_int16_t *nport, u_int16_t low, u_int16_t high,
struct pf_src_node **sn)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state key;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_addr init_addr;
u_int16_t cut;
bzero(&init_addr, sizeof(init_addr));
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (pf_map_addr(af, r, saddr, naddr, &init_addr, sn))
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (1);
do {
key.af = af;
key.proto = proto;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PF_ACPY(&key.ext.addr, daddr, key.af);
PF_ACPY(&key.gwy.addr, naddr, key.af);
key.ext.port = dport;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
/*
* port search; start random, step;
* similar 2 portloop in in_pcbbind
*/
if (!(proto == IPPROTO_TCP || proto == IPPROTO_UDP)) {
Initialise init_addr in pf_map_addr() in the PF_POOL_ROUNDROBIN, prevents a possible endless loop in pf_get_sport() with 'static-port' ICMP state entries use the ICMP ID as port for the unique state key. When checking for a usable key, construct the key in the same way. Otherwise, a colliding key might be missed or a state insertion might be refused even though it could be inserted. The second case triggers the endless loop, possibly allowing a NATed LAN client to lock up the kernel. PR: kern/74930 Reported and tested by: Hugo Silva, Srebrenko Sehic MFC after: 3 days
2004-12-19 19:43:04 +00:00
key.gwy.port = dport;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (0);
} else if (low == 0 && high == 0) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
key.gwy.port = *nport;
if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (0);
} else if (low == high) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
key.gwy.port = htons(low);
if (pf_find_state_all(&key, PF_EXT_GWY, NULL) == NULL) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
*nport = htons(low);
return (0);
}
} else {
u_int16_t tmp;
if (low > high) {
tmp = low;
low = high;
high = tmp;
}
/* low < high */
cut = arc4random() % (1 + high - low) + low;
/* low <= cut <= high */
for (tmp = cut; tmp <= high; ++(tmp)) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
key.gwy.port = htons(tmp);
if (pf_find_state_all(&key, PF_EXT_GWY, NULL) ==
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
NULL) {
*nport = htons(tmp);
return (0);
}
}
for (tmp = cut - 1; tmp >= low; --(tmp)) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
key.gwy.port = htons(tmp);
if (pf_find_state_all(&key, PF_EXT_GWY, NULL) ==
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
NULL) {
*nport = htons(tmp);
return (0);
}
}
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
switch (r->rpool.opts & PF_POOL_TYPEMASK) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
case PF_POOL_RANDOM:
case PF_POOL_ROUNDROBIN:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (pf_map_addr(af, r, saddr, naddr, &init_addr, sn))
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (1);
break;
case PF_POOL_NONE:
case PF_POOL_SRCHASH:
case PF_POOL_BITMASK:
default:
return (1);
}
} while (! PF_AEQ(&init_addr, naddr, af) );
return (1); /* none available */
}
struct pf_rule *
pf_match_translation(struct pf_pdesc *pd, struct mbuf *m, int off,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
int direction, struct pfi_kif *kif, struct pf_addr *saddr, u_int16_t sport,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_addr *daddr, u_int16_t dport, int rs_num)
{
struct pf_rule *r, *rm = NULL, *anchorrule = NULL;
struct pf_ruleset *ruleset = NULL;
r = TAILQ_FIRST(pf_main_ruleset.rules[rs_num].active.ptr);
while (r && rm == NULL) {
struct pf_rule_addr *src = NULL, *dst = NULL;
struct pf_addr_wrap *xdst = NULL;
if (r->action == PF_BINAT && direction == PF_IN) {
src = &r->dst;
if (r->rpool.cur != NULL)
xdst = &r->rpool.cur->addr;
} else {
src = &r->src;
dst = &r->dst;
}
r->evaluations++;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (r->kif != NULL &&
(r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = r->skip[PF_SKIP_IFP].ptr;
else if (r->direction && r->direction != direction)
r = r->skip[PF_SKIP_DIR].ptr;
else if (r->af && r->af != pd->af)
r = r->skip[PF_SKIP_AF].ptr;
else if (r->proto && r->proto != pd->proto)
r = r->skip[PF_SKIP_PROTO].ptr;
else if (PF_MISMATCHAW(&src->addr, saddr, pd->af, src->not))
r = r->skip[src == &r->src ? PF_SKIP_SRC_ADDR :
PF_SKIP_DST_ADDR].ptr;
else if (src->port_op && !pf_match_port(src->port_op,
src->port[0], src->port[1], sport))
r = r->skip[src == &r->src ? PF_SKIP_SRC_PORT :
PF_SKIP_DST_PORT].ptr;
else if (dst != NULL &&
PF_MISMATCHAW(&dst->addr, daddr, pd->af, dst->not))
r = r->skip[PF_SKIP_DST_ADDR].ptr;
else if (xdst != NULL && PF_MISMATCHAW(xdst, daddr, pd->af, 0))
r = TAILQ_NEXT(r, entries);
else if (dst != NULL && dst->port_op &&
!pf_match_port(dst->port_op, dst->port[0],
dst->port[1], dport))
r = r->skip[PF_SKIP_DST_PORT].ptr;
else if (r->os_fingerprint != PF_OSFP_ANY && (pd->proto !=
IPPROTO_TCP || !pf_osfp_match(pf_osfp_fingerprint(pd, m,
off, pd->hdr.tcp), r->os_fingerprint)))
r = TAILQ_NEXT(r, entries);
else if (r->anchorname[0] && r->anchor == NULL)
r = TAILQ_NEXT(r, entries);
else if (r->anchor == NULL)
rm = r;
else
PF_STEP_INTO_ANCHOR(r, anchorrule, ruleset, rs_num);
if (r == NULL && anchorrule != NULL)
PF_STEP_OUT_OF_ANCHOR(r, anchorrule, ruleset,
rs_num);
}
if (rm != NULL && (rm->action == PF_NONAT ||
rm->action == PF_NORDR || rm->action == PF_NOBINAT))
return (NULL);
return (rm);
}
struct pf_rule *
pf_get_translation(struct pf_pdesc *pd, struct mbuf *m, int off, int direction,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pfi_kif *kif, struct pf_src_node **sn,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_addr *saddr, u_int16_t sport,
struct pf_addr *daddr, u_int16_t dport,
struct pf_addr *naddr, u_int16_t *nport)
{
struct pf_rule *r = NULL;
if (direction == PF_OUT) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
r = pf_match_translation(pd, m, off, direction, kif, saddr,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
sport, daddr, dport, PF_RULESET_BINAT);
if (r == NULL)
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
r = pf_match_translation(pd, m, off, direction, kif,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
saddr, sport, daddr, dport, PF_RULESET_NAT);
} else {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
r = pf_match_translation(pd, m, off, direction, kif, saddr,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
sport, daddr, dport, PF_RULESET_RDR);
if (r == NULL)
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
r = pf_match_translation(pd, m, off, direction, kif,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
saddr, sport, daddr, dport, PF_RULESET_BINAT);
}
if (r != NULL) {
switch (r->action) {
case PF_NONAT:
case PF_NOBINAT:
case PF_NORDR:
return (NULL);
case PF_NAT:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (pf_get_sport(pd->af, pd->proto, r, saddr,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
daddr, dport, naddr, nport, r->rpool.proxy_port[0],
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
r->rpool.proxy_port[1], sn)) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
DPFPRINTF(PF_DEBUG_MISC,
("pf: NAT proxy port allocation "
"(%u-%u) failed\n",
r->rpool.proxy_port[0],
r->rpool.proxy_port[1]));
return (NULL);
}
break;
case PF_BINAT:
switch (direction) {
case PF_OUT:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (r->rpool.cur->addr.type == PF_ADDR_DYNIFTL){
if (pd->af == AF_INET) {
if (r->rpool.cur->addr.p.dyn->
pfid_acnt4 < 1)
return (NULL);
PF_POOLMASK(naddr,
&r->rpool.cur->addr.p.dyn->
pfid_addr4,
&r->rpool.cur->addr.p.dyn->
pfid_mask4,
saddr, AF_INET);
} else {
if (r->rpool.cur->addr.p.dyn->
pfid_acnt6 < 1)
return (NULL);
PF_POOLMASK(naddr,
&r->rpool.cur->addr.p.dyn->
pfid_addr6,
&r->rpool.cur->addr.p.dyn->
pfid_mask6,
saddr, AF_INET6);
}
} else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
PF_POOLMASK(naddr,
&r->rpool.cur->addr.v.a.addr,
&r->rpool.cur->addr.v.a.mask,
saddr, pd->af);
break;
case PF_IN:
fix a bug that leads to a crash when binat rules of the form 'binat from ... to ... -> (if)' are used, where the interface is dynamic. Discovered by: kos(at)bastard(dot)net Analyzed by: Pyun YongHyeon Approved by: mlaier (mentor) MFC after: 1 week
2004-11-24 00:43:34 +00:00
if (r->src.addr.type == PF_ADDR_DYNIFTL) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (pd->af == AF_INET) {
if (r->src.addr.p.dyn->
pfid_acnt4 < 1)
return (NULL);
PF_POOLMASK(naddr,
&r->src.addr.p.dyn->
pfid_addr4,
&r->src.addr.p.dyn->
pfid_mask4,
daddr, AF_INET);
} else {
if (r->src.addr.p.dyn->
pfid_acnt6 < 1)
return (NULL);
PF_POOLMASK(naddr,
&r->src.addr.p.dyn->
pfid_addr6,
&r->src.addr.p.dyn->
pfid_mask6,
daddr, AF_INET6);
}
} else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
PF_POOLMASK(naddr,
&r->src.addr.v.a.addr,
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
&r->src.addr.v.a.mask, daddr,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pd->af);
break;
}
break;
case PF_RDR: {
Use the packet's address family instead of the rule's when selecting a replacement address for an rdr rule. Some rdr rules have no address family (when the replacement is a table and no other criterion implies one AF). In this case, pf would fail to select a replacement address and drop the packet due to translation failure. Found by: Gustavo A. Baratto
2005-01-20 18:07:35 +00:00
if (pf_map_addr(pd->af, r, saddr, naddr, NULL, sn))
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (NULL);
if (r->rpool.proxy_port[1]) {
u_int32_t tmp_nport;
tmp_nport = ((ntohs(dport) -
ntohs(r->dst.port[0])) %
(r->rpool.proxy_port[1] -
r->rpool.proxy_port[0] + 1)) +
r->rpool.proxy_port[0];
/* wrap around if necessary */
if (tmp_nport > 65535)
tmp_nport -= 65535;
*nport = htons((u_int16_t)tmp_nport);
} else if (r->rpool.proxy_port[0])
*nport = htons(r->rpool.proxy_port[0]);
break;
}
default:
return (NULL);
}
}
return (r);
}
int
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
pf_socket_lookup(uid_t *uid, gid_t *gid, int direction, struct pf_pdesc *pd,
struct inpcb *inp_arg)
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_socket_lookup(uid_t *uid, gid_t *gid, int direction, struct pf_pdesc *pd)
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
struct pf_addr *saddr, *daddr;
u_int16_t sport, dport;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
struct inpcbinfo *pi;
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct inpcbtable *tb;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct inpcb *inp;
*uid = UID_MAX;
*gid = GID_MAX;
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
if (inp_arg != NULL) {
INP_LOCK_ASSERT(inp_arg);
if (inp_arg->inp_socket) {
*uid = inp_arg->inp_socket->so_cred->cr_uid;
*gid = inp_arg->inp_socket->so_cred->cr_groups[0];
return (1);
} else
return (0);
}
#endif
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
switch (pd->proto) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
case IPPROTO_TCP:
sport = pd->hdr.tcp->th_sport;
dport = pd->hdr.tcp->th_dport;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
pi = &tcbinfo;
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
tb = &tcbtable;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
case IPPROTO_UDP:
sport = pd->hdr.udp->uh_sport;
dport = pd->hdr.udp->uh_dport;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
pi = &udbinfo;
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
tb = &udbtable;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
default:
return (0);
}
if (direction == PF_IN) {
saddr = pd->src;
daddr = pd->dst;
} else {
u_int16_t p;
p = sport;
sport = dport;
dport = p;
saddr = pd->dst;
daddr = pd->src;
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
switch (pd->af) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
case AF_INET:
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
INP_INFO_RLOCK(pi); /* XXX LOR */
inp = in_pcblookup_hash(pi, saddr->v4, sport, daddr->v4,
dport, 0, NULL);
if (inp == NULL) {
inp = in_pcblookup_hash(pi, saddr->v4, sport,
daddr->v4, dport, INPLOOKUP_WILDCARD, NULL);
if(inp == NULL) {
INP_INFO_RUNLOCK(pi);
return (0);
}
}
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
inp = in_pcbhashlookup(tb, saddr->v4, sport, daddr->v4, dport);
if (inp == NULL) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
inp = in_pcblookup_listen(tb, daddr->v4, dport, 0);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (inp == NULL)
return (0);
}
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#ifdef INET6
case AF_INET6:
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
INP_INFO_RLOCK(pi);
inp = in6_pcblookup_hash(pi, &saddr->v6, sport,
&daddr->v6, dport, 0, NULL);
if (inp == NULL) {
inp = in6_pcblookup_hash(pi, &saddr->v6, sport,
&daddr->v6, dport, INPLOOKUP_WILDCARD, NULL);
if (inp == NULL) {
INP_INFO_RUNLOCK(pi);
return (0);
}
}
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
inp = in6_pcbhashlookup(tb, &saddr->v6, sport, &daddr->v6,
dport);
if (inp == NULL) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
inp = in6_pcblookup_listen(tb, &daddr->v6, dport, 0);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (inp == NULL)
return (0);
}
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET6 */
default:
return (0);
}
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
INP_LOCK(inp);
Fix a panic discovered with some apache2 configure test (that seemed to trigger a socket creation race some some kind). Checking for non-NULL socket and credential is not a bad idea anyway. Unfortunatly too late for the release. Reported & tested by: Gilbert Cao MFC after: 2 weeks
2004-10-24 19:35:02 +00:00
if ((inp->inp_socket == NULL) || (inp->inp_socket->so_cred == NULL)) {
INP_UNLOCK(inp);
INP_INFO_RUNLOCK(pi);
return (0);
}
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
*uid = inp->inp_socket->so_cred->cr_uid;
*gid = inp->inp_socket->so_cred->cr_groups[0];
INP_UNLOCK(inp);
INP_INFO_RUNLOCK(pi);
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
*uid = inp->inp_socket->so_euid;
*gid = inp->inp_socket->so_egid;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (1);
}
u_int8_t
pf_get_wscale(struct mbuf *m, int off, u_int16_t th_off, sa_family_t af)
{
int hlen;
u_int8_t hdr[60];
u_int8_t *opt, optlen;
u_int8_t wscale = 0;
hlen = th_off << 2; /* hlen <= sizeof(hdr) */
if (hlen <= sizeof(struct tcphdr))
return (0);
if (!pf_pull_hdr(m, off, hdr, hlen, NULL, NULL, af))
return (0);
opt = hdr + sizeof(struct tcphdr);
hlen -= sizeof(struct tcphdr);
while (hlen >= 3) {
switch (*opt) {
case TCPOPT_EOL:
case TCPOPT_NOP:
++opt;
--hlen;
break;
case TCPOPT_WINDOW:
wscale = opt[2];
if (wscale > TCP_MAX_WINSHIFT)
wscale = TCP_MAX_WINSHIFT;
wscale |= PF_WSCALE_FLAG;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
/* FALLTHROUGH */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
default:
optlen = opt[1];
if (optlen < 2)
optlen = 2;
hlen -= optlen;
opt += optlen;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
break;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
}
return (wscale);
}
u_int16_t
pf_get_mss(struct mbuf *m, int off, u_int16_t th_off, sa_family_t af)
{
int hlen;
u_int8_t hdr[60];
u_int8_t *opt, optlen;
u_int16_t mss = tcp_mssdflt;
hlen = th_off << 2; /* hlen <= sizeof(hdr) */
if (hlen <= sizeof(struct tcphdr))
return (0);
if (!pf_pull_hdr(m, off, hdr, hlen, NULL, NULL, af))
return (0);
opt = hdr + sizeof(struct tcphdr);
hlen -= sizeof(struct tcphdr);
while (hlen >= TCPOLEN_MAXSEG) {
switch (*opt) {
case TCPOPT_EOL:
case TCPOPT_NOP:
++opt;
--hlen;
break;
case TCPOPT_MAXSEG:
bcopy((caddr_t)(opt + 2), (caddr_t)&mss, 2);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
/* FALLTHROUGH */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
default:
optlen = opt[1];
if (optlen < 2)
optlen = 2;
hlen -= optlen;
opt += optlen;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
break;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
}
return (mss);
}
u_int16_t
pf_calc_mss(struct pf_addr *addr, sa_family_t af, u_int16_t offer)
{
#ifdef INET
struct sockaddr_in *dst;
struct route ro;
#endif /* INET */
#ifdef INET6
struct sockaddr_in6 *dst6;
struct route_in6 ro6;
#endif /* INET6 */
struct rtentry *rt = NULL;
Shut up a couple of annoying gcc warnings. Do not enclose the fixes with #ifdefs in order to loop it back to OpenBSD after the next import. There are a some implicit asserts involved which might be better spelled out explicitly (af == AF_INET ...) Approved by: bms(mentor)
2004-03-30 18:28:30 +00:00
int hlen = 0; /* make the compiler happy */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
u_int16_t mss = tcp_mssdflt;
switch (af) {
#ifdef INET
case AF_INET:
hlen = sizeof(struct ip);
bzero(&ro, sizeof(ro));
dst = (struct sockaddr_in *)&ro.ro_dst;
dst->sin_family = AF_INET;
dst->sin_len = sizeof(*dst);
dst->sin_addr = addr->v4;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#ifdef RTF_PRCLONING
rtalloc_ign(&ro, (RTF_CLONING | RTF_PRCLONING));
#else /* !RTF_PRCLONING */
rtalloc_ign(&ro, RTF_CLONING);
#endif
#else /* ! __FreeBSD__ */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
rtalloc_noclone(&ro, NO_CLONING);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
rt = ro.ro_rt;
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
hlen = sizeof(struct ip6_hdr);
bzero(&ro6, sizeof(ro6));
dst6 = (struct sockaddr_in6 *)&ro6.ro_dst;
dst6->sin6_family = AF_INET6;
dst6->sin6_len = sizeof(*dst6);
dst6->sin6_addr = addr->v6;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#ifdef RTF_PRCLONING
rtalloc_ign((struct route *)&ro6,
(RTF_CLONING | RTF_PRCLONING));
#else /* !RTF_PRCLONING */
rtalloc_ign((struct route *)&ro6, RTF_CLONING);
#endif
#else /* ! __FreeBSD__ */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
rtalloc_noclone((struct route *)&ro6, NO_CLONING);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
rt = ro6.ro_rt;
break;
#endif /* INET6 */
}
if (rt && rt->rt_ifp) {
mss = rt->rt_ifp->if_mtu - hlen - sizeof(struct tcphdr);
mss = max(tcp_mssdflt, mss);
RTFREE(rt);
}
mss = min(mss, offer);
mss = max(mss, 64); /* sanity - at least max opt space */
return (mss);
}
void
pf_set_rt_ifp(struct pf_state *s, struct pf_addr *saddr)
{
struct pf_rule *r = s->rule.ptr;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
s->rt_kif = NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (!r->rt || r->rt == PF_FASTROUTE)
return;
switch (s->af) {
#ifdef INET
case AF_INET:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_map_addr(AF_INET, r, saddr, &s->rt_addr, NULL,
&s->nat_src_node);
s->rt_kif = r->rpool.cur->kif;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_map_addr(AF_INET6, r, saddr, &s->rt_addr, NULL,
&s->nat_src_node);
s->rt_kif = r->rpool.cur->kif;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET6 */
}
}
int
pf_test_tcp(struct pf_rule **rm, struct pf_state **sm, int direction,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pfi_kif *kif, struct mbuf *m, int off, void *h,
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm,
struct inpcb *inp)
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm)
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_rule *nr = NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_addr *saddr = pd->src, *daddr = pd->dst;
struct tcphdr *th = pd->hdr.tcp;
u_int16_t bport, nport = 0;
sa_family_t af = pd->af;
int lookup = -1;
uid_t uid;
gid_t gid;
struct pf_rule *r, *a = NULL;
struct pf_ruleset *ruleset = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_src_node *nsn = NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
u_short reason;
int rewrite = 0;
struct pf_tag *pftag = NULL;
int tag = -1;
u_int16_t mss = tcp_mssdflt;
r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr);
if (direction == PF_OUT) {
bport = nport = th->th_sport;
/* check outgoing packet for BINAT/NAT */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
saddr, th->th_sport, daddr, th->th_dport,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
&pd->naddr, &nport)) != NULL) {
PF_ACPY(&pd->baddr, saddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pf_change_ap(saddr, &th->th_sport, pd->ip_sum,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
&th->th_sum, &pd->naddr, nport, 0, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
rewrite++;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr->natpass)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pd->nat_rule = nr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
} else {
bport = nport = th->th_dport;
/* check incoming packet for BINAT/RDR */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn,
saddr, th->th_sport, daddr, th->th_dport,
&pd->naddr, &nport)) != NULL) {
PF_ACPY(&pd->baddr, daddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pf_change_ap(daddr, &th->th_dport, pd->ip_sum,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
&th->th_sum, &pd->naddr, nport, 0, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
rewrite++;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr->natpass)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pd->nat_rule = nr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
}
while (r != NULL) {
r->evaluations++;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (r->kif != NULL &&
(r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = r->skip[PF_SKIP_IFP].ptr;
else if (r->direction && r->direction != direction)
r = r->skip[PF_SKIP_DIR].ptr;
else if (r->af && r->af != af)
r = r->skip[PF_SKIP_AF].ptr;
else if (r->proto && r->proto != IPPROTO_TCP)
r = r->skip[PF_SKIP_PROTO].ptr;
else if (PF_MISMATCHAW(&r->src.addr, saddr, af, r->src.not))
r = r->skip[PF_SKIP_SRC_ADDR].ptr;
else if (r->src.port_op && !pf_match_port(r->src.port_op,
r->src.port[0], r->src.port[1], th->th_sport))
r = r->skip[PF_SKIP_SRC_PORT].ptr;
else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, r->dst.not))
r = r->skip[PF_SKIP_DST_ADDR].ptr;
else if (r->dst.port_op && !pf_match_port(r->dst.port_op,
r->dst.port[0], r->dst.port[1], th->th_dport))
r = r->skip[PF_SKIP_DST_PORT].ptr;
else if (r->tos && !(r->tos & pd->tos))
r = TAILQ_NEXT(r, entries);
else if (r->rule_flag & PFRULE_FRAGMENT)
r = TAILQ_NEXT(r, entries);
else if ((r->flagset & th->th_flags) != r->flags)
r = TAILQ_NEXT(r, entries);
else if (r->uid.op && (lookup != -1 || (lookup =
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
pf_socket_lookup(&uid, &gid, direction, pd, inp), 1)) &&
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_socket_lookup(&uid, &gid, direction, pd), 1)) &&
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
!pf_match_uid(r->uid.op, r->uid.uid[0], r->uid.uid[1],
uid))
r = TAILQ_NEXT(r, entries);
else if (r->gid.op && (lookup != -1 || (lookup =
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
pf_socket_lookup(&uid, &gid, direction, pd, inp), 1)) &&
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_socket_lookup(&uid, &gid, direction, pd), 1)) &&
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
!pf_match_gid(r->gid.op, r->gid.gid[0], r->gid.gid[1],
gid))
r = TAILQ_NEXT(r, entries);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
else if (r->match_tag && !pf_match_tag(m, r, nr, pftag, &tag))
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = TAILQ_NEXT(r, entries);
else if (r->anchorname[0] && r->anchor == NULL)
r = TAILQ_NEXT(r, entries);
else if (r->os_fingerprint != PF_OSFP_ANY && !pf_osfp_match(
pf_osfp_fingerprint(pd, m, off, th), r->os_fingerprint))
r = TAILQ_NEXT(r, entries);
else {
if (r->tag)
tag = r->tag;
if (r->anchor == NULL) {
*rm = r;
*am = a;
*rsm = ruleset;
if ((*rm)->quick)
break;
r = TAILQ_NEXT(r, entries);
} else
PF_STEP_INTO_ANCHOR(r, a, ruleset,
PF_RULESET_FILTER);
}
if (r == NULL && a != NULL)
PF_STEP_OUT_OF_ANCHOR(r, a, ruleset,
PF_RULESET_FILTER);
}
r = *rm;
a = *am;
ruleset = *rsm;
REASON_SET(&reason, PFRES_MATCH);
if (r->log) {
if (rewrite)
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
m_copyback(m, off, sizeof(*th), (caddr_t)th);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
if ((r->action == PF_DROP) &&
((r->rule_flag & PFRULE_RETURNRST) ||
(r->rule_flag & PFRULE_RETURNICMP) ||
(r->rule_flag & PFRULE_RETURN))) {
/* undo NAT changes, if they have taken place */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr != NULL) {
if (direction == PF_OUT) {
pf_change_ap(saddr, &th->th_sport, pd->ip_sum,
&th->th_sum, &pd->baddr, bport, 0, af);
rewrite++;
} else {
pf_change_ap(daddr, &th->th_dport, pd->ip_sum,
&th->th_sum, &pd->baddr, bport, 0, af);
rewrite++;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
if (((r->rule_flag & PFRULE_RETURNRST) ||
(r->rule_flag & PFRULE_RETURN)) &&
!(th->th_flags & TH_RST)) {
u_int32_t ack = ntohl(th->th_seq) + pd->p_len;
if (th->th_flags & TH_SYN)
ack++;
if (th->th_flags & TH_FIN)
ack++;
pf_send_tcp(r, af, pd->dst,
pd->src, th->th_dport, th->th_sport,
ntohl(th->th_ack), ack, TH_RST|TH_ACK, 0, 0,
r->return_ttl);
} else if ((af == AF_INET) && r->return_icmp)
pf_send_icmp(m, r->return_icmp >> 8,
r->return_icmp & 255, af, r);
else if ((af == AF_INET6) && r->return_icmp6)
pf_send_icmp(m, r->return_icmp6 >> 8,
r->return_icmp6 & 255, af, r);
}
if (r->action == PF_DROP)
return (PF_DROP);
if (pf_tag_packet(m, pftag, tag)) {
REASON_SET(&reason, PFRES_MEMORY);
return (PF_DROP);
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (r->keep_state || nr != NULL ||
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
(pd->flags & PFDESC_TCP_NORM)) {
/* create new state */
u_int16_t len;
struct pf_state *s = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_src_node *sn = NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
len = pd->tot_len - off - (th->th_off << 2);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
/* check maximums */
if (r->max_states && (r->states >= r->max_states))
goto cleanup;
/* src node for flter rule */
if ((r->rule_flag & PFRULE_SRCTRACK ||
r->rpool.opts & PF_POOL_STICKYADDR) &&
pf_insert_src_node(&sn, r, saddr, af) != 0)
goto cleanup;
/* src node for translation rule */
if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) &&
((direction == PF_OUT &&
pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) ||
(pf_insert_src_node(&nsn, nr, saddr, af) != 0)))
goto cleanup;
s = pool_get(&pf_state_pl, PR_NOWAIT);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (s == NULL) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
cleanup:
if (sn != NULL && sn->states == 0 && sn->expire == 0) {
RB_REMOVE(pf_src_tree, &tree_src_tracking, sn);
pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++;
pf_status.src_nodes--;
pool_put(&pf_src_tree_pl, sn);
}
if (nsn != sn && nsn != NULL && nsn->states == 0 &&
nsn->expire == 0) {
RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn);
pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++;
pf_status.src_nodes--;
pool_put(&pf_src_tree_pl, nsn);
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
REASON_SET(&reason, PFRES_MEMORY);
return (PF_DROP);
}
bzero(s, sizeof(*s));
r->states++;
if (a != NULL)
a->states++;
s->rule.ptr = r;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
s->nat_rule.ptr = nr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (s->nat_rule.ptr != NULL)
s->nat_rule.ptr->states++;
s->anchor.ptr = a;
s->allow_opts = r->allow_opts;
s->log = r->log & 2;
s->proto = IPPROTO_TCP;
s->direction = direction;
s->af = af;
if (direction == PF_OUT) {
PF_ACPY(&s->gwy.addr, saddr, af);
s->gwy.port = th->th_sport; /* sport */
PF_ACPY(&s->ext.addr, daddr, af);
s->ext.port = th->th_dport;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr != NULL) {
PF_ACPY(&s->lan.addr, &pd->baddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s->lan.port = bport;
} else {
PF_ACPY(&s->lan.addr, &s->gwy.addr, af);
s->lan.port = s->gwy.port;
}
} else {
PF_ACPY(&s->lan.addr, daddr, af);
s->lan.port = th->th_dport;
PF_ACPY(&s->ext.addr, saddr, af);
s->ext.port = th->th_sport;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr != NULL) {
PF_ACPY(&s->gwy.addr, &pd->baddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s->gwy.port = bport;
} else {
PF_ACPY(&s->gwy.addr, &s->lan.addr, af);
s->gwy.port = s->lan.port;
}
}
s->src.seqlo = ntohl(th->th_seq);
s->src.seqhi = s->src.seqlo + len + 1;
if ((th->th_flags & (TH_SYN|TH_ACK)) == TH_SYN &&
r->keep_state == PF_STATE_MODULATE) {
/* Generate sequence number modulator */
while ((s->src.seqdiff = arc4random()) == 0)
;
pf_change_a(&th->th_seq, &th->th_sum,
htonl(s->src.seqlo + s->src.seqdiff), 0);
rewrite = 1;
} else
s->src.seqdiff = 0;
if (th->th_flags & TH_SYN) {
s->src.seqhi++;
s->src.wscale = pf_get_wscale(m, off, th->th_off, af);
}
s->src.max_win = MAX(ntohs(th->th_win), 1);
if (s->src.wscale & PF_WSCALE_MASK) {
/* Remove scale factor from initial window */
int win = s->src.max_win;
win += 1 << (s->src.wscale & PF_WSCALE_MASK);
s->src.max_win = (win - 1) >>
(s->src.wscale & PF_WSCALE_MASK);
}
if (th->th_flags & TH_FIN)
s->src.seqhi++;
s->dst.seqhi = 1;
s->dst.max_win = 1;
s->src.state = TCPS_SYN_SENT;
s->dst.state = TCPS_CLOSED;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
s->creation = time_second;
s->expire = time_second;
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s->creation = time.tv_sec;
s->expire = time.tv_sec;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s->timeout = PFTM_TCP_FIRST_PACKET;
pf_set_rt_ifp(s, saddr);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (sn != NULL) {
s->src_node = sn;
s->src_node->states++;
}
if (nsn != NULL) {
PF_ACPY(&nsn->raddr, &pd->naddr, af);
s->nat_src_node = nsn;
s->nat_src_node->states++;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if ((pd->flags & PFDESC_TCP_NORM) && pf_normalize_tcp_init(m,
off, pd, th, &s->src, &s->dst)) {
REASON_SET(&reason, PFRES_MEMORY);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_src_tree_remove_state(s);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pool_put(&pf_state_pl, s);
return (PF_DROP);
}
if ((pd->flags & PFDESC_TCP_NORM) && s->src.scrub &&
pf_normalize_tcp_stateful(m, off, pd, &reason, th, &s->src,
&s->dst, &rewrite)) {
pf_normalize_tcp_cleanup(s);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_src_tree_remove_state(s);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pool_put(&pf_state_pl, s);
return (PF_DROP);
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (pf_insert_state(BOUND_IFACE(r, kif), s)) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pf_normalize_tcp_cleanup(s);
REASON_SET(&reason, PFRES_MEMORY);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_src_tree_remove_state(s);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pool_put(&pf_state_pl, s);
return (PF_DROP);
} else
*sm = s;
if ((th->th_flags & (TH_SYN|TH_ACK)) == TH_SYN &&
r->keep_state == PF_STATE_SYNPROXY) {
s->src.state = PF_TCPS_PROXY_SRC;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr != NULL) {
if (direction == PF_OUT) {
pf_change_ap(saddr, &th->th_sport,
pd->ip_sum, &th->th_sum, &pd->baddr,
bport, 0, af);
} else {
pf_change_ap(daddr, &th->th_dport,
pd->ip_sum, &th->th_sum, &pd->baddr,
bport, 0, af);
}
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s->src.seqhi = arc4random();
/* Find mss option */
mss = pf_get_mss(m, off, th->th_off, af);
mss = pf_calc_mss(saddr, af, mss);
mss = pf_calc_mss(daddr, af, mss);
s->src.mss = mss;
pf_send_tcp(r, af, daddr, saddr, th->th_dport,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
th->th_sport, s->src.seqhi, ntohl(th->th_seq) + 1,
TH_SYN|TH_ACK, 0, s->src.mss, 0);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (PF_SYNPROXY_DROP);
}
}
/* copy back packet headers if we performed NAT operations */
if (rewrite)
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
m_copyback(m, off, sizeof(*th), (caddr_t)th);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (PF_PASS);
}
int
pf_test_udp(struct pf_rule **rm, struct pf_state **sm, int direction,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pfi_kif *kif, struct mbuf *m, int off, void *h,
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm,
struct inpcb *inp)
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm)
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_rule *nr = NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_addr *saddr = pd->src, *daddr = pd->dst;
struct udphdr *uh = pd->hdr.udp;
u_int16_t bport, nport = 0;
sa_family_t af = pd->af;
int lookup = -1;
uid_t uid;
gid_t gid;
struct pf_rule *r, *a = NULL;
struct pf_ruleset *ruleset = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_src_node *nsn = NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
u_short reason;
int rewrite = 0;
struct pf_tag *pftag = NULL;
int tag = -1;
r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr);
if (direction == PF_OUT) {
bport = nport = uh->uh_sport;
/* check outgoing packet for BINAT/NAT */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
saddr, uh->uh_sport, daddr, uh->uh_dport,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
&pd->naddr, &nport)) != NULL) {
PF_ACPY(&pd->baddr, saddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pf_change_ap(saddr, &uh->uh_sport, pd->ip_sum,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
&uh->uh_sum, &pd->naddr, nport, 1, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
rewrite++;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr->natpass)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pd->nat_rule = nr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
} else {
bport = nport = uh->uh_dport;
/* check incoming packet for BINAT/RDR */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn,
saddr, uh->uh_sport, daddr, uh->uh_dport, &pd->naddr,
&nport)) != NULL) {
PF_ACPY(&pd->baddr, daddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pf_change_ap(daddr, &uh->uh_dport, pd->ip_sum,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
&uh->uh_sum, &pd->naddr, nport, 1, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
rewrite++;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr->natpass)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pd->nat_rule = nr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
}
while (r != NULL) {
r->evaluations++;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (r->kif != NULL &&
(r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = r->skip[PF_SKIP_IFP].ptr;
else if (r->direction && r->direction != direction)
r = r->skip[PF_SKIP_DIR].ptr;
else if (r->af && r->af != af)
r = r->skip[PF_SKIP_AF].ptr;
else if (r->proto && r->proto != IPPROTO_UDP)
r = r->skip[PF_SKIP_PROTO].ptr;
else if (PF_MISMATCHAW(&r->src.addr, saddr, af, r->src.not))
r = r->skip[PF_SKIP_SRC_ADDR].ptr;
else if (r->src.port_op && !pf_match_port(r->src.port_op,
r->src.port[0], r->src.port[1], uh->uh_sport))
r = r->skip[PF_SKIP_SRC_PORT].ptr;
else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, r->dst.not))
r = r->skip[PF_SKIP_DST_ADDR].ptr;
else if (r->dst.port_op && !pf_match_port(r->dst.port_op,
r->dst.port[0], r->dst.port[1], uh->uh_dport))
r = r->skip[PF_SKIP_DST_PORT].ptr;
else if (r->tos && !(r->tos & pd->tos))
r = TAILQ_NEXT(r, entries);
else if (r->rule_flag & PFRULE_FRAGMENT)
r = TAILQ_NEXT(r, entries);
else if (r->uid.op && (lookup != -1 || (lookup =
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
pf_socket_lookup(&uid, &gid, direction, pd, inp), 1)) &&
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_socket_lookup(&uid, &gid, direction, pd), 1)) &&
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
!pf_match_uid(r->uid.op, r->uid.uid[0], r->uid.uid[1],
uid))
r = TAILQ_NEXT(r, entries);
else if (r->gid.op && (lookup != -1 || (lookup =
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
pf_socket_lookup(&uid, &gid, direction, pd, inp), 1)) &&
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_socket_lookup(&uid, &gid, direction, pd), 1)) &&
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
!pf_match_gid(r->gid.op, r->gid.gid[0], r->gid.gid[1],
gid))
r = TAILQ_NEXT(r, entries);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
else if (r->match_tag && !pf_match_tag(m, r, nr, pftag, &tag))
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = TAILQ_NEXT(r, entries);
else if (r->anchorname[0] && r->anchor == NULL)
r = TAILQ_NEXT(r, entries);
else if (r->os_fingerprint != PF_OSFP_ANY)
r = TAILQ_NEXT(r, entries);
else {
if (r->tag)
tag = r->tag;
if (r->anchor == NULL) {
*rm = r;
*am = a;
*rsm = ruleset;
if ((*rm)->quick)
break;
r = TAILQ_NEXT(r, entries);
} else
PF_STEP_INTO_ANCHOR(r, a, ruleset,
PF_RULESET_FILTER);
}
if (r == NULL && a != NULL)
PF_STEP_OUT_OF_ANCHOR(r, a, ruleset,
PF_RULESET_FILTER);
}
r = *rm;
a = *am;
ruleset = *rsm;
REASON_SET(&reason, PFRES_MATCH);
if (r->log) {
if (rewrite)
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
m_copyback(m, off, sizeof(*uh), (caddr_t)uh);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
if ((r->action == PF_DROP) &&
((r->rule_flag & PFRULE_RETURNICMP) ||
(r->rule_flag & PFRULE_RETURN))) {
/* undo NAT changes, if they have taken place */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr != NULL) {
if (direction == PF_OUT) {
pf_change_ap(saddr, &uh->uh_sport, pd->ip_sum,
&uh->uh_sum, &pd->baddr, bport, 1, af);
rewrite++;
} else {
pf_change_ap(daddr, &uh->uh_dport, pd->ip_sum,
&uh->uh_sum, &pd->baddr, bport, 1, af);
rewrite++;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
if ((af == AF_INET) && r->return_icmp)
pf_send_icmp(m, r->return_icmp >> 8,
r->return_icmp & 255, af, r);
else if ((af == AF_INET6) && r->return_icmp6)
pf_send_icmp(m, r->return_icmp6 >> 8,
r->return_icmp6 & 255, af, r);
}
if (r->action == PF_DROP)
return (PF_DROP);
if (pf_tag_packet(m, pftag, tag)) {
REASON_SET(&reason, PFRES_MEMORY);
return (PF_DROP);
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (r->keep_state || nr != NULL) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
/* create new state */
struct pf_state *s = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_src_node *sn = NULL;
/* check maximums */
if (r->max_states && (r->states >= r->max_states))
goto cleanup;
/* src node for flter rule */
if ((r->rule_flag & PFRULE_SRCTRACK ||
r->rpool.opts & PF_POOL_STICKYADDR) &&
pf_insert_src_node(&sn, r, saddr, af) != 0)
goto cleanup;
/* src node for translation rule */
if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) &&
((direction == PF_OUT &&
pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) ||
(pf_insert_src_node(&nsn, nr, saddr, af) != 0)))
goto cleanup;
s = pool_get(&pf_state_pl, PR_NOWAIT);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (s == NULL) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
cleanup:
if (sn != NULL && sn->states == 0 && sn->expire == 0) {
RB_REMOVE(pf_src_tree, &tree_src_tracking, sn);
pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++;
pf_status.src_nodes--;
pool_put(&pf_src_tree_pl, sn);
}
if (nsn != sn && nsn != NULL && nsn->states == 0 &&
nsn->expire == 0) {
RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn);
pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++;
pf_status.src_nodes--;
pool_put(&pf_src_tree_pl, nsn);
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
REASON_SET(&reason, PFRES_MEMORY);
return (PF_DROP);
}
bzero(s, sizeof(*s));
r->states++;
if (a != NULL)
a->states++;
s->rule.ptr = r;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
s->nat_rule.ptr = nr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (s->nat_rule.ptr != NULL)
s->nat_rule.ptr->states++;
s->anchor.ptr = a;
s->allow_opts = r->allow_opts;
s->log = r->log & 2;
s->proto = IPPROTO_UDP;
s->direction = direction;
s->af = af;
if (direction == PF_OUT) {
PF_ACPY(&s->gwy.addr, saddr, af);
s->gwy.port = uh->uh_sport;
PF_ACPY(&s->ext.addr, daddr, af);
s->ext.port = uh->uh_dport;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr != NULL) {
PF_ACPY(&s->lan.addr, &pd->baddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s->lan.port = bport;
} else {
PF_ACPY(&s->lan.addr, &s->gwy.addr, af);
s->lan.port = s->gwy.port;
}
} else {
PF_ACPY(&s->lan.addr, daddr, af);
s->lan.port = uh->uh_dport;
PF_ACPY(&s->ext.addr, saddr, af);
s->ext.port = uh->uh_sport;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr != NULL) {
PF_ACPY(&s->gwy.addr, &pd->baddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s->gwy.port = bport;
} else {
PF_ACPY(&s->gwy.addr, &s->lan.addr, af);
s->gwy.port = s->lan.port;
}
}
s->src.state = PFUDPS_SINGLE;
s->dst.state = PFUDPS_NO_TRAFFIC;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
s->creation = time_second;
s->expire = time_second;
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s->creation = time.tv_sec;
s->expire = time.tv_sec;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s->timeout = PFTM_UDP_FIRST_PACKET;
pf_set_rt_ifp(s, saddr);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (sn != NULL) {
s->src_node = sn;
s->src_node->states++;
}
if (nsn != NULL) {
PF_ACPY(&nsn->raddr, &pd->naddr, af);
s->nat_src_node = nsn;
s->nat_src_node->states++;
}
if (pf_insert_state(BOUND_IFACE(r, kif), s)) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
REASON_SET(&reason, PFRES_MEMORY);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_src_tree_remove_state(s);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pool_put(&pf_state_pl, s);
return (PF_DROP);
} else
*sm = s;
}
/* copy back packet headers if we performed NAT operations */
if (rewrite)
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
m_copyback(m, off, sizeof(*uh), (caddr_t)uh);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (PF_PASS);
}
int
pf_test_icmp(struct pf_rule **rm, struct pf_state **sm, int direction,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pfi_kif *kif, struct mbuf *m, int off, void *h,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_pdesc *pd, struct pf_rule **am, struct pf_ruleset **rsm)
{
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_rule *nr = NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_addr *saddr = pd->src, *daddr = pd->dst;
struct pf_rule *r, *a = NULL;
struct pf_ruleset *ruleset = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_src_node *nsn = NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
u_short reason;
Shut up a couple of annoying gcc warnings. Do not enclose the fixes with #ifdefs in order to loop it back to OpenBSD after the next import. There are a some implicit asserts involved which might be better spelled out explicitly (af == AF_INET ...) Approved by: bms(mentor)
2004-03-30 18:28:30 +00:00
u_int16_t icmpid = 0; /* make the compiler happy */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
sa_family_t af = pd->af;
Shut up a couple of annoying gcc warnings. Do not enclose the fixes with #ifdefs in order to loop it back to OpenBSD after the next import. There are a some implicit asserts involved which might be better spelled out explicitly (af == AF_INET ...) Approved by: bms(mentor)
2004-03-30 18:28:30 +00:00
u_int8_t icmptype = 0; /* make the compiler happy */
u_int8_t icmpcode = 0; /* make the compiler happy */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
int state_icmp = 0;
struct pf_tag *pftag = NULL;
int tag = -1;
#ifdef INET6
int rewrite = 0;
#endif /* INET6 */
switch (pd->proto) {
#ifdef INET
case IPPROTO_ICMP:
icmptype = pd->hdr.icmp->icmp_type;
icmpcode = pd->hdr.icmp->icmp_code;
icmpid = pd->hdr.icmp->icmp_id;
if (icmptype == ICMP_UNREACH ||
icmptype == ICMP_SOURCEQUENCH ||
icmptype == ICMP_REDIRECT ||
icmptype == ICMP_TIMXCEED ||
icmptype == ICMP_PARAMPROB)
state_icmp++;
break;
#endif /* INET */
#ifdef INET6
case IPPROTO_ICMPV6:
icmptype = pd->hdr.icmp6->icmp6_type;
icmpcode = pd->hdr.icmp6->icmp6_code;
icmpid = pd->hdr.icmp6->icmp6_id;
if (icmptype == ICMP6_DST_UNREACH ||
icmptype == ICMP6_PACKET_TOO_BIG ||
icmptype == ICMP6_TIME_EXCEEDED ||
icmptype == ICMP6_PARAM_PROB)
state_icmp++;
break;
#endif /* INET6 */
}
r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr);
if (direction == PF_OUT) {
/* check outgoing packet for BINAT/NAT */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn,
Initialise init_addr in pf_map_addr() in the PF_POOL_ROUNDROBIN, prevents a possible endless loop in pf_get_sport() with 'static-port' ICMP state entries use the ICMP ID as port for the unique state key. When checking for a usable key, construct the key in the same way. Otherwise, a colliding key might be missed or a state insertion might be refused even though it could be inserted. The second case triggers the endless loop, possibly allowing a NATed LAN client to lock up the kernel. PR: kern/74930 Reported and tested by: Hugo Silva, Srebrenko Sehic MFC after: 3 days
2004-12-19 19:43:04 +00:00
saddr, icmpid, daddr, icmpid, &pd->naddr, NULL)) != NULL) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PF_ACPY(&pd->baddr, saddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
switch (af) {
#ifdef INET
case AF_INET:
pf_change_a(&saddr->v4.s_addr, pd->ip_sum,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pd->naddr.v4.s_addr, 0);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
pf_change_a6(saddr, &pd->hdr.icmp6->icmp6_cksum,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
&pd->naddr, 0);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
rewrite++;
break;
#endif /* INET6 */
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr->natpass)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pd->nat_rule = nr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
} else {
/* check incoming packet for BINAT/RDR */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn,
Initialise init_addr in pf_map_addr() in the PF_POOL_ROUNDROBIN, prevents a possible endless loop in pf_get_sport() with 'static-port' ICMP state entries use the ICMP ID as port for the unique state key. When checking for a usable key, construct the key in the same way. Otherwise, a colliding key might be missed or a state insertion might be refused even though it could be inserted. The second case triggers the endless loop, possibly allowing a NATed LAN client to lock up the kernel. PR: kern/74930 Reported and tested by: Hugo Silva, Srebrenko Sehic MFC after: 3 days
2004-12-19 19:43:04 +00:00
saddr, icmpid, daddr, icmpid, &pd->naddr, NULL)) != NULL) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PF_ACPY(&pd->baddr, daddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
switch (af) {
#ifdef INET
case AF_INET:
pf_change_a(&daddr->v4.s_addr,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pd->ip_sum, pd->naddr.v4.s_addr, 0);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
pf_change_a6(daddr, &pd->hdr.icmp6->icmp6_cksum,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
&pd->naddr, 0);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
rewrite++;
break;
#endif /* INET6 */
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr->natpass)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pd->nat_rule = nr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
}
while (r != NULL) {
r->evaluations++;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (r->kif != NULL &&
(r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = r->skip[PF_SKIP_IFP].ptr;
else if (r->direction && r->direction != direction)
r = r->skip[PF_SKIP_DIR].ptr;
else if (r->af && r->af != af)
r = r->skip[PF_SKIP_AF].ptr;
else if (r->proto && r->proto != pd->proto)
r = r->skip[PF_SKIP_PROTO].ptr;
else if (PF_MISMATCHAW(&r->src.addr, saddr, af, r->src.not))
r = r->skip[PF_SKIP_SRC_ADDR].ptr;
else if (PF_MISMATCHAW(&r->dst.addr, daddr, af, r->dst.not))
r = r->skip[PF_SKIP_DST_ADDR].ptr;
else if (r->type && r->type != icmptype + 1)
r = TAILQ_NEXT(r, entries);
else if (r->code && r->code != icmpcode + 1)
r = TAILQ_NEXT(r, entries);
else if (r->tos && !(r->tos & pd->tos))
r = TAILQ_NEXT(r, entries);
else if (r->rule_flag & PFRULE_FRAGMENT)
r = TAILQ_NEXT(r, entries);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
else if (r->match_tag && !pf_match_tag(m, r, nr, pftag, &tag))
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = TAILQ_NEXT(r, entries);
else if (r->anchorname[0] && r->anchor == NULL)
r = TAILQ_NEXT(r, entries);
else if (r->os_fingerprint != PF_OSFP_ANY)
r = TAILQ_NEXT(r, entries);
else {
if (r->tag)
tag = r->tag;
if (r->anchor == NULL) {
*rm = r;
*am = a;
*rsm = ruleset;
if ((*rm)->quick)
break;
r = TAILQ_NEXT(r, entries);
} else
PF_STEP_INTO_ANCHOR(r, a, ruleset,
PF_RULESET_FILTER);
}
if (r == NULL && a != NULL)
PF_STEP_OUT_OF_ANCHOR(r, a, ruleset,
PF_RULESET_FILTER);
}
r = *rm;
a = *am;
ruleset = *rsm;
REASON_SET(&reason, PFRES_MATCH);
if (r->log) {
#ifdef INET6
if (rewrite)
m_copyback(m, off, sizeof(struct icmp6_hdr),
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)pd->hdr.icmp6);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#endif /* INET6 */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
if (r->action != PF_PASS)
return (PF_DROP);
if (pf_tag_packet(m, pftag, tag)) {
REASON_SET(&reason, PFRES_MEMORY);
return (PF_DROP);
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (!state_icmp && (r->keep_state || nr != NULL)) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
/* create new state */
struct pf_state *s = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_src_node *sn = NULL;
/* check maximums */
if (r->max_states && (r->states >= r->max_states))
goto cleanup;
/* src node for flter rule */
if ((r->rule_flag & PFRULE_SRCTRACK ||
r->rpool.opts & PF_POOL_STICKYADDR) &&
pf_insert_src_node(&sn, r, saddr, af) != 0)
goto cleanup;
/* src node for translation rule */
if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) &&
((direction == PF_OUT &&
pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) ||
(pf_insert_src_node(&nsn, nr, saddr, af) != 0)))
goto cleanup;
s = pool_get(&pf_state_pl, PR_NOWAIT);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (s == NULL) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
cleanup:
if (sn != NULL && sn->states == 0 && sn->expire == 0) {
RB_REMOVE(pf_src_tree, &tree_src_tracking, sn);
pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++;
pf_status.src_nodes--;
pool_put(&pf_src_tree_pl, sn);
}
if (nsn != sn && nsn != NULL && nsn->states == 0 &&
nsn->expire == 0) {
RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn);
pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++;
pf_status.src_nodes--;
pool_put(&pf_src_tree_pl, nsn);
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
REASON_SET(&reason, PFRES_MEMORY);
return (PF_DROP);
}
bzero(s, sizeof(*s));
r->states++;
if (a != NULL)
a->states++;
s->rule.ptr = r;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
s->nat_rule.ptr = nr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (s->nat_rule.ptr != NULL)
s->nat_rule.ptr->states++;
s->anchor.ptr = a;
s->allow_opts = r->allow_opts;
s->log = r->log & 2;
s->proto = pd->proto;
s->direction = direction;
s->af = af;
if (direction == PF_OUT) {
PF_ACPY(&s->gwy.addr, saddr, af);
s->gwy.port = icmpid;
PF_ACPY(&s->ext.addr, daddr, af);
s->ext.port = icmpid;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr != NULL)
PF_ACPY(&s->lan.addr, &pd->baddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
else
PF_ACPY(&s->lan.addr, &s->gwy.addr, af);
s->lan.port = icmpid;
} else {
PF_ACPY(&s->lan.addr, daddr, af);
s->lan.port = icmpid;
PF_ACPY(&s->ext.addr, saddr, af);
s->ext.port = icmpid;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr != NULL)
PF_ACPY(&s->gwy.addr, &pd->baddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
else
PF_ACPY(&s->gwy.addr, &s->lan.addr, af);
s->gwy.port = icmpid;
}
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
s->creation = time_second;
s->expire = time_second;
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s->creation = time.tv_sec;
s->expire = time.tv_sec;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s->timeout = PFTM_ICMP_FIRST_PACKET;
pf_set_rt_ifp(s, saddr);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (sn != NULL) {
s->src_node = sn;
s->src_node->states++;
}
if (nsn != NULL) {
PF_ACPY(&nsn->raddr, &pd->naddr, af);
s->nat_src_node = nsn;
s->nat_src_node->states++;
}
if (pf_insert_state(BOUND_IFACE(r, kif), s)) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
REASON_SET(&reason, PFRES_MEMORY);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_src_tree_remove_state(s);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pool_put(&pf_state_pl, s);
return (PF_DROP);
} else
*sm = s;
}
#ifdef INET6
/* copy back packet headers if we performed IPv6 NAT operations */
if (rewrite)
m_copyback(m, off, sizeof(struct icmp6_hdr),
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)pd->hdr.icmp6);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#endif /* INET6 */
return (PF_PASS);
}
int
pf_test_other(struct pf_rule **rm, struct pf_state **sm, int direction,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pfi_kif *kif, struct mbuf *m, int off, void *h, struct pf_pdesc *pd,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_rule **am, struct pf_ruleset **rsm)
{
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_rule *nr = NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_rule *r, *a = NULL;
struct pf_ruleset *ruleset = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_src_node *nsn = NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_addr *saddr = pd->src, *daddr = pd->dst;
sa_family_t af = pd->af;
u_short reason;
struct pf_tag *pftag = NULL;
int tag = -1;
r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr);
if (direction == PF_OUT) {
/* check outgoing packet for BINAT/NAT */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if ((nr = pf_get_translation(pd, m, off, PF_OUT, kif, &nsn,
saddr, 0, daddr, 0, &pd->naddr, NULL)) != NULL) {
PF_ACPY(&pd->baddr, saddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
switch (af) {
#ifdef INET
case AF_INET:
pf_change_a(&saddr->v4.s_addr, pd->ip_sum,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pd->naddr.v4.s_addr, 0);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PF_ACPY(saddr, &pd->naddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET6 */
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr->natpass)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pd->nat_rule = nr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
} else {
/* check incoming packet for BINAT/RDR */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if ((nr = pf_get_translation(pd, m, off, PF_IN, kif, &nsn,
saddr, 0, daddr, 0, &pd->naddr, NULL)) != NULL) {
PF_ACPY(&pd->baddr, daddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
switch (af) {
#ifdef INET
case AF_INET:
pf_change_a(&daddr->v4.s_addr,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pd->ip_sum, pd->naddr.v4.s_addr, 0);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PF_ACPY(daddr, &pd->naddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET6 */
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr->natpass)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pd->nat_rule = nr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
}
while (r != NULL) {
r->evaluations++;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (r->kif != NULL &&
(r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = r->skip[PF_SKIP_IFP].ptr;
else if (r->direction && r->direction != direction)
r = r->skip[PF_SKIP_DIR].ptr;
else if (r->af && r->af != af)
r = r->skip[PF_SKIP_AF].ptr;
else if (r->proto && r->proto != pd->proto)
r = r->skip[PF_SKIP_PROTO].ptr;
else if (PF_MISMATCHAW(&r->src.addr, pd->src, af, r->src.not))
r = r->skip[PF_SKIP_SRC_ADDR].ptr;
else if (PF_MISMATCHAW(&r->dst.addr, pd->dst, af, r->dst.not))
r = r->skip[PF_SKIP_DST_ADDR].ptr;
else if (r->tos && !(r->tos & pd->tos))
r = TAILQ_NEXT(r, entries);
else if (r->rule_flag & PFRULE_FRAGMENT)
r = TAILQ_NEXT(r, entries);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
else if (r->match_tag && !pf_match_tag(m, r, nr, pftag, &tag))
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = TAILQ_NEXT(r, entries);
else if (r->anchorname[0] && r->anchor == NULL)
r = TAILQ_NEXT(r, entries);
else if (r->os_fingerprint != PF_OSFP_ANY)
r = TAILQ_NEXT(r, entries);
else {
if (r->tag)
tag = r->tag;
if (r->anchor == NULL) {
*rm = r;
*am = a;
*rsm = ruleset;
if ((*rm)->quick)
break;
r = TAILQ_NEXT(r, entries);
} else
PF_STEP_INTO_ANCHOR(r, a, ruleset,
PF_RULESET_FILTER);
}
if (r == NULL && a != NULL)
PF_STEP_OUT_OF_ANCHOR(r, a, ruleset,
PF_RULESET_FILTER);
}
r = *rm;
a = *am;
ruleset = *rsm;
REASON_SET(&reason, PFRES_MATCH);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (r->log)
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if ((r->action == PF_DROP) &&
((r->rule_flag & PFRULE_RETURNICMP) ||
(r->rule_flag & PFRULE_RETURN))) {
struct pf_addr *a = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr != NULL) {
if (direction == PF_OUT)
a = saddr;
else
a = daddr;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (a != NULL) {
switch (af) {
#ifdef INET
case AF_INET:
pf_change_a(&a->v4.s_addr, pd->ip_sum,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pd->baddr.v4.s_addr, 0);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PF_ACPY(a, &pd->baddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET6 */
}
}
if ((af == AF_INET) && r->return_icmp)
pf_send_icmp(m, r->return_icmp >> 8,
r->return_icmp & 255, af, r);
else if ((af == AF_INET6) && r->return_icmp6)
pf_send_icmp(m, r->return_icmp6 >> 8,
r->return_icmp6 & 255, af, r);
}
if (r->action != PF_PASS)
return (PF_DROP);
if (pf_tag_packet(m, pftag, tag)) {
REASON_SET(&reason, PFRES_MEMORY);
return (PF_DROP);
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (r->keep_state || nr != NULL) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
/* create new state */
struct pf_state *s = NULL;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_src_node *sn = NULL;
/* check maximums */
if (r->max_states && (r->states >= r->max_states))
goto cleanup;
/* src node for flter rule */
if ((r->rule_flag & PFRULE_SRCTRACK ||
r->rpool.opts & PF_POOL_STICKYADDR) &&
pf_insert_src_node(&sn, r, saddr, af) != 0)
goto cleanup;
/* src node for translation rule */
if (nr != NULL && (nr->rpool.opts & PF_POOL_STICKYADDR) &&
((direction == PF_OUT &&
pf_insert_src_node(&nsn, nr, &pd->baddr, af) != 0) ||
(pf_insert_src_node(&nsn, nr, saddr, af) != 0)))
goto cleanup;
s = pool_get(&pf_state_pl, PR_NOWAIT);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (s == NULL) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
cleanup:
if (sn != NULL && sn->states == 0 && sn->expire == 0) {
RB_REMOVE(pf_src_tree, &tree_src_tracking, sn);
pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++;
pf_status.src_nodes--;
pool_put(&pf_src_tree_pl, sn);
}
if (nsn != sn && nsn != NULL && nsn->states == 0 &&
nsn->expire == 0) {
RB_REMOVE(pf_src_tree, &tree_src_tracking, nsn);
pf_status.scounters[SCNT_SRC_NODE_REMOVALS]++;
pf_status.src_nodes--;
pool_put(&pf_src_tree_pl, nsn);
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
REASON_SET(&reason, PFRES_MEMORY);
return (PF_DROP);
}
bzero(s, sizeof(*s));
r->states++;
if (a != NULL)
a->states++;
s->rule.ptr = r;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
s->nat_rule.ptr = nr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (s->nat_rule.ptr != NULL)
s->nat_rule.ptr->states++;
s->anchor.ptr = a;
s->allow_opts = r->allow_opts;
s->log = r->log & 2;
s->proto = pd->proto;
s->direction = direction;
s->af = af;
if (direction == PF_OUT) {
PF_ACPY(&s->gwy.addr, saddr, af);
PF_ACPY(&s->ext.addr, daddr, af);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr != NULL)
PF_ACPY(&s->lan.addr, &pd->baddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
else
PF_ACPY(&s->lan.addr, &s->gwy.addr, af);
} else {
PF_ACPY(&s->lan.addr, daddr, af);
PF_ACPY(&s->ext.addr, saddr, af);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (nr != NULL)
PF_ACPY(&s->gwy.addr, &pd->baddr, af);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
else
PF_ACPY(&s->gwy.addr, &s->lan.addr, af);
}
s->src.state = PFOTHERS_SINGLE;
s->dst.state = PFOTHERS_NO_TRAFFIC;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
s->creation = time_second;
s->expire = time_second;
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s->creation = time.tv_sec;
s->expire = time.tv_sec;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
s->timeout = PFTM_OTHER_FIRST_PACKET;
pf_set_rt_ifp(s, saddr);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (sn != NULL) {
s->src_node = sn;
s->src_node->states++;
}
if (nsn != NULL) {
PF_ACPY(&nsn->raddr, &pd->naddr, af);
s->nat_src_node = nsn;
s->nat_src_node->states++;
}
if (pf_insert_state(BOUND_IFACE(r, kif), s)) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
REASON_SET(&reason, PFRES_MEMORY);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_src_tree_remove_state(s);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pool_put(&pf_state_pl, s);
return (PF_DROP);
} else
*sm = s;
}
return (PF_PASS);
}
int
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_test_fragment(struct pf_rule **rm, int direction, struct pfi_kif *kif,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct mbuf *m, void *h, struct pf_pdesc *pd, struct pf_rule **am,
struct pf_ruleset **rsm)
{
struct pf_rule *r, *a = NULL;
struct pf_ruleset *ruleset = NULL;
sa_family_t af = pd->af;
u_short reason;
struct pf_tag *pftag = NULL;
int tag = -1;
r = TAILQ_FIRST(pf_main_ruleset.rules[PF_RULESET_FILTER].active.ptr);
while (r != NULL) {
r->evaluations++;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (r->kif != NULL &&
(r->kif != kif && r->kif != kif->pfik_parent) == !r->ifnot)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = r->skip[PF_SKIP_IFP].ptr;
else if (r->direction && r->direction != direction)
r = r->skip[PF_SKIP_DIR].ptr;
else if (r->af && r->af != af)
r = r->skip[PF_SKIP_AF].ptr;
else if (r->proto && r->proto != pd->proto)
r = r->skip[PF_SKIP_PROTO].ptr;
else if (PF_MISMATCHAW(&r->src.addr, pd->src, af, r->src.not))
r = r->skip[PF_SKIP_SRC_ADDR].ptr;
else if (PF_MISMATCHAW(&r->dst.addr, pd->dst, af, r->dst.not))
r = r->skip[PF_SKIP_DST_ADDR].ptr;
else if (r->tos && !(r->tos & pd->tos))
r = TAILQ_NEXT(r, entries);
else if (r->src.port_op || r->dst.port_op ||
r->flagset || r->type || r->code ||
r->os_fingerprint != PF_OSFP_ANY)
r = TAILQ_NEXT(r, entries);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
else if (r->match_tag && !pf_match_tag(m, r, NULL, pftag, &tag))
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = TAILQ_NEXT(r, entries);
else if (r->anchorname[0] && r->anchor == NULL)
r = TAILQ_NEXT(r, entries);
else {
if (r->anchor == NULL) {
*rm = r;
*am = a;
*rsm = ruleset;
if ((*rm)->quick)
break;
r = TAILQ_NEXT(r, entries);
} else
PF_STEP_INTO_ANCHOR(r, a, ruleset,
PF_RULESET_FILTER);
}
if (r == NULL && a != NULL)
PF_STEP_OUT_OF_ANCHOR(r, a, ruleset,
PF_RULESET_FILTER);
}
r = *rm;
a = *am;
ruleset = *rsm;
REASON_SET(&reason, PFRES_MATCH);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (r->log)
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PFLOG_PACKET(kif, h, m, af, direction, reason, r, a, ruleset);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (r->action != PF_PASS)
return (PF_DROP);
if (pf_tag_packet(m, pftag, tag)) {
REASON_SET(&reason, PFRES_MEMORY);
return (PF_DROP);
}
return (PF_PASS);
}
int
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_test_state_tcp(struct pf_state **state, int direction, struct pfi_kif *kif,
struct mbuf *m, int off, void *h, struct pf_pdesc *pd,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
u_short *reason)
{
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state key;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct tcphdr *th = pd->hdr.tcp;
u_int16_t win = ntohs(th->th_win);
u_int32_t ack, end, seq;
u_int8_t sws, dws;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
int ackskew;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
int copyback = 0;
struct pf_state_peer *src, *dst;
key.af = pd->af;
key.proto = IPPROTO_TCP;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (direction == PF_IN) {
PF_ACPY(&key.ext.addr, pd->src, key.af);
PF_ACPY(&key.gwy.addr, pd->dst, key.af);
key.ext.port = th->th_sport;
key.gwy.port = th->th_dport;
} else {
PF_ACPY(&key.lan.addr, pd->src, key.af);
PF_ACPY(&key.ext.addr, pd->dst, key.af);
key.lan.port = th->th_sport;
key.ext.port = th->th_dport;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
STATE_LOOKUP();
if (direction == (*state)->direction) {
src = &(*state)->src;
dst = &(*state)->dst;
} else {
src = &(*state)->dst;
dst = &(*state)->src;
}
if ((*state)->src.state == PF_TCPS_PROXY_SRC) {
if (direction != (*state)->direction)
return (PF_SYNPROXY_DROP);
if (th->th_flags & TH_SYN) {
if (ntohl(th->th_seq) != (*state)->src.seqlo)
return (PF_DROP);
pf_send_tcp((*state)->rule.ptr, pd->af, pd->dst,
pd->src, th->th_dport, th->th_sport,
(*state)->src.seqhi, ntohl(th->th_seq) + 1,
TH_SYN|TH_ACK, 0, (*state)->src.mss, 0);
return (PF_SYNPROXY_DROP);
} else if (!(th->th_flags & TH_ACK) ||
(ntohl(th->th_ack) != (*state)->src.seqhi + 1) ||
(ntohl(th->th_seq) != (*state)->src.seqlo + 1))
return (PF_DROP);
else
(*state)->src.state = PF_TCPS_PROXY_DST;
}
if ((*state)->src.state == PF_TCPS_PROXY_DST) {
struct pf_state_host *src, *dst;
if (direction == PF_OUT) {
src = &(*state)->gwy;
dst = &(*state)->ext;
} else {
src = &(*state)->ext;
dst = &(*state)->lan;
}
if (direction == (*state)->direction) {
if (((th->th_flags & (TH_SYN|TH_ACK)) != TH_ACK) ||
(ntohl(th->th_ack) != (*state)->src.seqhi + 1) ||
(ntohl(th->th_seq) != (*state)->src.seqlo + 1))
return (PF_DROP);
(*state)->src.max_win = MAX(ntohs(th->th_win), 1);
if ((*state)->dst.seqhi == 1)
(*state)->dst.seqhi = arc4random();
pf_send_tcp((*state)->rule.ptr, pd->af, &src->addr,
&dst->addr, src->port, dst->port,
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
(*state)->dst.seqhi, 0, TH_SYN, 0,
(*state)->src.mss, 0);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (PF_SYNPROXY_DROP);
} else if (((th->th_flags & (TH_SYN|TH_ACK)) !=
(TH_SYN|TH_ACK)) ||
(ntohl(th->th_ack) != (*state)->dst.seqhi + 1))
return (PF_DROP);
else {
(*state)->dst.max_win = MAX(ntohs(th->th_win), 1);
(*state)->dst.seqlo = ntohl(th->th_seq);
pf_send_tcp((*state)->rule.ptr, pd->af, pd->dst,
pd->src, th->th_dport, th->th_sport,
ntohl(th->th_ack), ntohl(th->th_seq) + 1,
TH_ACK, (*state)->src.max_win, 0, 0);
pf_send_tcp((*state)->rule.ptr, pd->af, &src->addr,
&dst->addr, src->port, dst->port,
(*state)->src.seqhi + 1, (*state)->src.seqlo + 1,
TH_ACK, (*state)->dst.max_win, 0, 0);
(*state)->src.seqdiff = (*state)->dst.seqhi -
(*state)->src.seqlo;
(*state)->dst.seqdiff = (*state)->src.seqhi -
(*state)->dst.seqlo;
(*state)->src.seqhi = (*state)->src.seqlo +
(*state)->src.max_win;
(*state)->dst.seqhi = (*state)->dst.seqlo +
(*state)->dst.max_win;
(*state)->src.wscale = (*state)->dst.wscale = 0;
(*state)->src.state = (*state)->dst.state =
TCPS_ESTABLISHED;
return (PF_SYNPROXY_DROP);
}
}
if (src->wscale && dst->wscale && !(th->th_flags & TH_SYN)) {
sws = src->wscale & PF_WSCALE_MASK;
dws = dst->wscale & PF_WSCALE_MASK;
} else
sws = dws = 0;
/*
* Sequence tracking algorithm from Guido van Rooij's paper:
* http://www.madison-gurkha.com/publications/tcp_filtering/
* tcp_filtering.ps
*/
seq = ntohl(th->th_seq);
if (src->seqlo == 0) {
/* First packet from this end. Set its state */
if ((pd->flags & PFDESC_TCP_NORM || dst->scrub) &&
src->scrub == NULL) {
if (pf_normalize_tcp_init(m, off, pd, th, src, dst)) {
REASON_SET(reason, PFRES_MEMORY);
return (PF_DROP);
}
}
/* Deferred generation of sequence number modulator */
if (dst->seqdiff && !src->seqdiff) {
while ((src->seqdiff = arc4random()) == 0)
;
ack = ntohl(th->th_ack) - dst->seqdiff;
pf_change_a(&th->th_seq, &th->th_sum, htonl(seq +
src->seqdiff), 0);
pf_change_a(&th->th_ack, &th->th_sum, htonl(ack), 0);
copyback = 1;
} else {
ack = ntohl(th->th_ack);
}
end = seq + pd->p_len;
if (th->th_flags & TH_SYN) {
end++;
if (dst->wscale & PF_WSCALE_FLAG) {
src->wscale = pf_get_wscale(m, off, th->th_off,
pd->af);
if (src->wscale & PF_WSCALE_FLAG) {
/* Remove scale factor from initial
* window */
sws = src->wscale & PF_WSCALE_MASK;
win = ((u_int32_t)win + (1 << sws) - 1)
>> sws;
dws = dst->wscale & PF_WSCALE_MASK;
} else {
/* fixup other window */
dst->max_win <<= dst->wscale &
PF_WSCALE_MASK;
/* in case of a retrans SYN|ACK */
dst->wscale = 0;
}
}
}
if (th->th_flags & TH_FIN)
end++;
src->seqlo = seq;
if (src->state < TCPS_SYN_SENT)
src->state = TCPS_SYN_SENT;
/*
* May need to slide the window (seqhi may have been set by
* the crappy stack check or if we picked up the connection
* after establishment)
*/
if (src->seqhi == 1 ||
SEQ_GEQ(end + MAX(1, dst->max_win << dws), src->seqhi))
src->seqhi = end + MAX(1, dst->max_win << dws);
if (win > src->max_win)
src->max_win = win;
} else {
ack = ntohl(th->th_ack) - dst->seqdiff;
if (src->seqdiff) {
/* Modulate sequence numbers */
pf_change_a(&th->th_seq, &th->th_sum, htonl(seq +
src->seqdiff), 0);
pf_change_a(&th->th_ack, &th->th_sum, htonl(ack), 0);
copyback = 1;
}
end = seq + pd->p_len;
if (th->th_flags & TH_SYN)
end++;
if (th->th_flags & TH_FIN)
end++;
}
if ((th->th_flags & TH_ACK) == 0) {
/* Let it pass through the ack skew check */
ack = dst->seqlo;
} else if ((ack == 0 &&
(th->th_flags & (TH_ACK|TH_RST)) == (TH_ACK|TH_RST)) ||
/* broken tcp stacks do not set ack */
(dst->state < TCPS_SYN_SENT)) {
/*
* Many stacks (ours included) will set the ACK number in an
* FIN|ACK if the SYN times out -- no sequence to ACK.
*/
ack = dst->seqlo;
}
if (seq == end) {
/* Ease sequencing restrictions on no data packets */
seq = src->seqlo;
end = seq;
}
ackskew = dst->seqlo - ack;
#define MAXACKWINDOW (0xffff + 1500) /* 1500 is an arbitrary fudge factor */
if (SEQ_GEQ(src->seqhi, end) &&
/* Last octet inside other's window space */
SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws)) &&
/* Retrans: not more than one window back */
(ackskew >= -MAXACKWINDOW) &&
/* Acking not more than one reassembled fragment backwards */
(ackskew <= (MAXACKWINDOW << sws))) {
/* Acking not more than one window forward */
/* update max window */
if (src->max_win < win)
src->max_win = win;
/* synchronize sequencing */
if (SEQ_GT(end, src->seqlo))
src->seqlo = end;
/* slide the window of what the other end can send */
if (SEQ_GEQ(ack + (win << sws), dst->seqhi))
dst->seqhi = ack + MAX((win << sws), 1);
/* update states */
if (th->th_flags & TH_SYN)
if (src->state < TCPS_SYN_SENT)
src->state = TCPS_SYN_SENT;
if (th->th_flags & TH_FIN)
if (src->state < TCPS_CLOSING)
src->state = TCPS_CLOSING;
if (th->th_flags & TH_ACK) {
if (dst->state == TCPS_SYN_SENT)
dst->state = TCPS_ESTABLISHED;
else if (dst->state == TCPS_CLOSING)
dst->state = TCPS_FIN_WAIT_2;
}
if (th->th_flags & TH_RST)
src->state = dst->state = TCPS_TIME_WAIT;
/* update expire time */
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(*state)->expire = time_second;
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
(*state)->expire = time.tv_sec;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (src->state >= TCPS_FIN_WAIT_2 &&
dst->state >= TCPS_FIN_WAIT_2)
(*state)->timeout = PFTM_TCP_CLOSED;
else if (src->state >= TCPS_FIN_WAIT_2 ||
dst->state >= TCPS_FIN_WAIT_2)
(*state)->timeout = PFTM_TCP_FIN_WAIT;
else if (src->state < TCPS_ESTABLISHED ||
dst->state < TCPS_ESTABLISHED)
(*state)->timeout = PFTM_TCP_OPENING;
else if (src->state >= TCPS_CLOSING ||
dst->state >= TCPS_CLOSING)
(*state)->timeout = PFTM_TCP_CLOSING;
else
(*state)->timeout = PFTM_TCP_ESTABLISHED;
/* Fall through to PASS packet */
} else if ((dst->state < TCPS_SYN_SENT ||
dst->state >= TCPS_FIN_WAIT_2 ||
src->state >= TCPS_FIN_WAIT_2) &&
SEQ_GEQ(src->seqhi + MAXACKWINDOW, end) &&
/* Within a window forward of the originating packet */
SEQ_GEQ(seq, src->seqlo - MAXACKWINDOW)) {
/* Within a window backward of the originating packet */
/*
* This currently handles three situations:
* 1) Stupid stacks will shotgun SYNs before their peer
* replies.
* 2) When PF catches an already established stream (the
* firewall rebooted, the state table was flushed, routes
* changed...)
* 3) Packets get funky immediately after the connection
* closes (this should catch Solaris spurious ACK|FINs
* that web servers like to spew after a close)
*
* This must be a little more careful than the above code
* since packet floods will also be caught here. We don't
* update the TTL here to mitigate the damage of a packet
* flood and so the same code can handle awkward establishment
* and a loosened connection close.
* In the establishment case, a correct peer response will
* validate the connection, go through the normal state code
* and keep updating the state TTL.
*/
if (pf_status.debug >= PF_DEBUG_MISC) {
printf("pf: loose state match: ");
pf_print_state(*state);
pf_print_flags(th->th_flags);
printf(" seq=%u ack=%u len=%u ackskew=%d pkts=%d:%d\n",
seq, ack, pd->p_len, ackskew,
(*state)->packets[0], (*state)->packets[1]);
}
/* update max window */
if (src->max_win < win)
src->max_win = win;
/* synchronize sequencing */
if (SEQ_GT(end, src->seqlo))
src->seqlo = end;
/* slide the window of what the other end can send */
if (SEQ_GEQ(ack + (win << sws), dst->seqhi))
dst->seqhi = ack + MAX((win << sws), 1);
/*
* Cannot set dst->seqhi here since this could be a shotgunned
* SYN and not an already established connection.
*/
if (th->th_flags & TH_FIN)
if (src->state < TCPS_CLOSING)
src->state = TCPS_CLOSING;
if (th->th_flags & TH_RST)
src->state = dst->state = TCPS_TIME_WAIT;
/* Fall through to PASS packet */
} else {
if ((*state)->dst.state == TCPS_SYN_SENT &&
(*state)->src.state == TCPS_SYN_SENT) {
/* Send RST for state mismatches during handshake */
if (!(th->th_flags & TH_RST)) {
u_int32_t ack = ntohl(th->th_seq) + pd->p_len;
if (th->th_flags & TH_SYN)
ack++;
if (th->th_flags & TH_FIN)
ack++;
pf_send_tcp((*state)->rule.ptr, pd->af,
pd->dst, pd->src, th->th_dport,
th->th_sport, ntohl(th->th_ack), ack,
TH_RST|TH_ACK, 0, 0,
(*state)->rule.ptr->return_ttl);
}
src->seqlo = 0;
src->seqhi = 1;
src->max_win = 1;
} else if (pf_status.debug >= PF_DEBUG_MISC) {
printf("pf: BAD state: ");
pf_print_state(*state);
pf_print_flags(th->th_flags);
printf(" seq=%u ack=%u len=%u ackskew=%d pkts=%d:%d "
"dir=%s,%s\n", seq, ack, pd->p_len, ackskew,
(*state)->packets[0], (*state)->packets[1],
direction == PF_IN ? "in" : "out",
direction == (*state)->direction ? "fwd" : "rev");
printf("pf: State failure on: %c %c %c %c | %c %c\n",
SEQ_GEQ(src->seqhi, end) ? ' ' : '1',
SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws)) ?
' ': '2',
(ackskew >= -MAXACKWINDOW) ? ' ' : '3',
(ackskew <= (MAXACKWINDOW << sws)) ? ' ' : '4',
SEQ_GEQ(src->seqhi + MAXACKWINDOW, end) ?' ' :'5',
SEQ_GEQ(seq, src->seqlo - MAXACKWINDOW) ?' ' :'6');
}
return (PF_DROP);
}
if (dst->scrub || src->scrub) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (pf_normalize_tcp_stateful(m, off, pd, reason, th,
src, dst, &copyback))
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (PF_DROP);
}
/* Any packets which have gotten here are to be passed */
/* translate source/destination address, if necessary */
if (STATE_TRANSLATE(*state)) {
if (direction == PF_OUT)
pf_change_ap(pd->src, &th->th_sport, pd->ip_sum,
&th->th_sum, &(*state)->gwy.addr,
(*state)->gwy.port, 0, pd->af);
else
pf_change_ap(pd->dst, &th->th_dport, pd->ip_sum,
&th->th_sum, &(*state)->lan.addr,
(*state)->lan.port, 0, pd->af);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
m_copyback(m, off, sizeof(*th), (caddr_t)th);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
} else if (copyback) {
/* Copyback sequence modulation or stateful scrub changes */
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
m_copyback(m, off, sizeof(*th), (caddr_t)th);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
return (PF_PASS);
}
int
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_test_state_udp(struct pf_state **state, int direction, struct pfi_kif *kif,
struct mbuf *m, int off, void *h, struct pf_pdesc *pd)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
struct pf_state_peer *src, *dst;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state key;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct udphdr *uh = pd->hdr.udp;
key.af = pd->af;
key.proto = IPPROTO_UDP;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (direction == PF_IN) {
PF_ACPY(&key.ext.addr, pd->src, key.af);
PF_ACPY(&key.gwy.addr, pd->dst, key.af);
key.ext.port = uh->uh_sport;
key.gwy.port = uh->uh_dport;
} else {
PF_ACPY(&key.lan.addr, pd->src, key.af);
PF_ACPY(&key.ext.addr, pd->dst, key.af);
key.lan.port = uh->uh_sport;
key.ext.port = uh->uh_dport;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
STATE_LOOKUP();
if (direction == (*state)->direction) {
src = &(*state)->src;
dst = &(*state)->dst;
} else {
src = &(*state)->dst;
dst = &(*state)->src;
}
/* update states */
if (src->state < PFUDPS_SINGLE)
src->state = PFUDPS_SINGLE;
if (dst->state == PFUDPS_SINGLE)
dst->state = PFUDPS_MULTIPLE;
/* update expire time */
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(*state)->expire = time_second;
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
(*state)->expire = time.tv_sec;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (src->state == PFUDPS_MULTIPLE && dst->state == PFUDPS_MULTIPLE)
(*state)->timeout = PFTM_UDP_MULTIPLE;
else
(*state)->timeout = PFTM_UDP_SINGLE;
/* translate source/destination address, if necessary */
if (STATE_TRANSLATE(*state)) {
if (direction == PF_OUT)
pf_change_ap(pd->src, &uh->uh_sport, pd->ip_sum,
&uh->uh_sum, &(*state)->gwy.addr,
(*state)->gwy.port, 1, pd->af);
else
pf_change_ap(pd->dst, &uh->uh_dport, pd->ip_sum,
&uh->uh_sum, &(*state)->lan.addr,
(*state)->lan.port, 1, pd->af);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
m_copyback(m, off, sizeof(*uh), (caddr_t)uh);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
return (PF_PASS);
}
int
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_test_state_icmp(struct pf_state **state, int direction, struct pfi_kif *kif,
struct mbuf *m, int off, void *h, struct pf_pdesc *pd)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
struct pf_addr *saddr = pd->src, *daddr = pd->dst;
Shut up a couple of annoying gcc warnings. Do not enclose the fixes with #ifdefs in order to loop it back to OpenBSD after the next import. There are a some implicit asserts involved which might be better spelled out explicitly (af == AF_INET ...) Approved by: bms(mentor)
2004-03-30 18:28:30 +00:00
u_int16_t icmpid = 0; /* make the compiler happy */
u_int16_t *icmpsum = NULL; /* make the compiler happy */
u_int8_t icmptype = 0; /* make the compiler happy */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
int state_icmp = 0;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
switch (pd->proto) {
#ifdef INET
case IPPROTO_ICMP:
icmptype = pd->hdr.icmp->icmp_type;
icmpid = pd->hdr.icmp->icmp_id;
icmpsum = &pd->hdr.icmp->icmp_cksum;
if (icmptype == ICMP_UNREACH ||
icmptype == ICMP_SOURCEQUENCH ||
icmptype == ICMP_REDIRECT ||
icmptype == ICMP_TIMXCEED ||
icmptype == ICMP_PARAMPROB)
state_icmp++;
break;
#endif /* INET */
#ifdef INET6
case IPPROTO_ICMPV6:
icmptype = pd->hdr.icmp6->icmp6_type;
icmpid = pd->hdr.icmp6->icmp6_id;
icmpsum = &pd->hdr.icmp6->icmp6_cksum;
if (icmptype == ICMP6_DST_UNREACH ||
icmptype == ICMP6_PACKET_TOO_BIG ||
icmptype == ICMP6_TIME_EXCEEDED ||
icmptype == ICMP6_PARAM_PROB)
state_icmp++;
break;
#endif /* INET6 */
}
if (!state_icmp) {
/*
* ICMP query/reply message not related to a TCP/UDP packet.
* Search for an ICMP state.
*/
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state key;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
key.af = pd->af;
key.proto = pd->proto;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (direction == PF_IN) {
PF_ACPY(&key.ext.addr, pd->src, key.af);
PF_ACPY(&key.gwy.addr, pd->dst, key.af);
key.ext.port = icmpid;
key.gwy.port = icmpid;
} else {
PF_ACPY(&key.lan.addr, pd->src, key.af);
PF_ACPY(&key.ext.addr, pd->dst, key.af);
key.lan.port = icmpid;
key.ext.port = icmpid;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
STATE_LOOKUP();
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(*state)->expire = time_second;
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
(*state)->expire = time.tv_sec;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
(*state)->timeout = PFTM_ICMP_ERROR_REPLY;
/* translate source/destination address, if necessary */
if (PF_ANEQ(&(*state)->lan.addr, &(*state)->gwy.addr, pd->af)) {
if (direction == PF_OUT) {
switch (pd->af) {
#ifdef INET
case AF_INET:
pf_change_a(&saddr->v4.s_addr,
pd->ip_sum,
(*state)->gwy.addr.v4.s_addr, 0);
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
pf_change_a6(saddr,
&pd->hdr.icmp6->icmp6_cksum,
&(*state)->gwy.addr, 0);
m_copyback(m, off,
sizeof(struct icmp6_hdr),
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)pd->hdr.icmp6);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET6 */
}
} else {
switch (pd->af) {
#ifdef INET
case AF_INET:
pf_change_a(&daddr->v4.s_addr,
pd->ip_sum,
(*state)->lan.addr.v4.s_addr, 0);
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
pf_change_a6(daddr,
&pd->hdr.icmp6->icmp6_cksum,
&(*state)->lan.addr, 0);
m_copyback(m, off,
sizeof(struct icmp6_hdr),
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)pd->hdr.icmp6);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET6 */
}
}
}
return (PF_PASS);
} else {
/*
* ICMP error message in response to a TCP/UDP packet.
* Extract the inner TCP/UDP header and search for that state.
*/
struct pf_pdesc pd2;
#ifdef INET
struct ip h2;
#endif /* INET */
#ifdef INET6
struct ip6_hdr h2_6;
int terminal = 0;
#endif /* INET6 */
Shut up a couple of annoying gcc warnings. Do not enclose the fixes with #ifdefs in order to loop it back to OpenBSD after the next import. There are a some implicit asserts involved which might be better spelled out explicitly (af == AF_INET ...) Approved by: bms(mentor)
2004-03-30 18:28:30 +00:00
int ipoff2 = 0; /* make the compiler happy */
int off2 = 0; /* make the compiler happy */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pd2.af = pd->af;
switch (pd->af) {
#ifdef INET
case AF_INET:
/* offset of h2 in mbuf chain */
ipoff2 = off + ICMP_MINLEN;
if (!pf_pull_hdr(m, ipoff2, &h2, sizeof(h2),
NULL, NULL, pd2.af)) {
DPFPRINTF(PF_DEBUG_MISC,
("pf: ICMP error message too short "
"(ip)\n"));
return (PF_DROP);
}
/*
* ICMP error messages don't refer to non-first
* fragments
*/
if (h2.ip_off & htons(IP_OFFMASK))
return (PF_DROP);
/* offset of protocol header that follows h2 */
off2 = ipoff2 + (h2.ip_hl << 2);
pd2.proto = h2.ip_p;
pd2.src = (struct pf_addr *)&h2.ip_src;
pd2.dst = (struct pf_addr *)&h2.ip_dst;
pd2.ip_sum = &h2.ip_sum;
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
ipoff2 = off + sizeof(struct icmp6_hdr);
if (!pf_pull_hdr(m, ipoff2, &h2_6, sizeof(h2_6),
NULL, NULL, pd2.af)) {
DPFPRINTF(PF_DEBUG_MISC,
("pf: ICMP error message too short "
"(ip6)\n"));
return (PF_DROP);
}
pd2.proto = h2_6.ip6_nxt;
pd2.src = (struct pf_addr *)&h2_6.ip6_src;
pd2.dst = (struct pf_addr *)&h2_6.ip6_dst;
pd2.ip_sum = NULL;
off2 = ipoff2 + sizeof(h2_6);
do {
switch (pd2.proto) {
case IPPROTO_FRAGMENT:
/*
* ICMPv6 error messages for
* non-first fragments
*/
return (PF_DROP);
case IPPROTO_AH:
case IPPROTO_HOPOPTS:
case IPPROTO_ROUTING:
case IPPROTO_DSTOPTS: {
/* get next header and header length */
struct ip6_ext opt6;
if (!pf_pull_hdr(m, off2, &opt6,
sizeof(opt6), NULL, NULL, pd2.af)) {
DPFPRINTF(PF_DEBUG_MISC,
("pf: ICMPv6 short opt\n"));
return (PF_DROP);
}
if (pd2.proto == IPPROTO_AH)
off2 += (opt6.ip6e_len + 2) * 4;
else
off2 += (opt6.ip6e_len + 1) * 8;
pd2.proto = opt6.ip6e_nxt;
/* goto the next header */
break;
}
default:
terminal++;
break;
}
} while (!terminal);
break;
#endif /* INET6 */
}
switch (pd2.proto) {
case IPPROTO_TCP: {
struct tcphdr th;
u_int32_t seq;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state key;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_state_peer *src, *dst;
u_int8_t dws;
Commit import of OpenBSD-stable fix: Fix by dhartmei@ and mcbride@ 1.433 Properly m_copyback() modified TCP sequence number after demodulation 1.432 Fix icmp checksum when sequence number modlation is being used. Also fix a daddr vs saddr cut-n-paste error in ICMP error handling. Fixes PR 3724 Obtained from: OpenBSD Reviewed by: dhartmei Approved by: rwatson
2004-04-11 17:35:40 +00:00
int copyback = 0;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
/*
* Only the first 8 bytes of the TCP header can be
* expected. Don't access any TCP header fields after
* th_seq, an ackskew test is not possible.
*/
if (!pf_pull_hdr(m, off2, &th, 8, NULL, NULL, pd2.af)) {
DPFPRINTF(PF_DEBUG_MISC,
("pf: ICMP error message too short "
"(tcp)\n"));
return (PF_DROP);
}
key.af = pd2.af;
key.proto = IPPROTO_TCP;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (direction == PF_IN) {
PF_ACPY(&key.ext.addr, pd2.dst, key.af);
PF_ACPY(&key.gwy.addr, pd2.src, key.af);
key.ext.port = th.th_dport;
key.gwy.port = th.th_sport;
} else {
PF_ACPY(&key.lan.addr, pd2.dst, key.af);
PF_ACPY(&key.ext.addr, pd2.src, key.af);
key.lan.port = th.th_dport;
key.ext.port = th.th_sport;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
STATE_LOOKUP();
if (direction == (*state)->direction) {
src = &(*state)->dst;
dst = &(*state)->src;
} else {
src = &(*state)->src;
dst = &(*state)->dst;
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (src->wscale && dst->wscale &&
!(th.th_flags & TH_SYN))
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
dws = dst->wscale & PF_WSCALE_MASK;
else
dws = 0;
/* Demodulate sequence number */
seq = ntohl(th.th_seq) - src->seqdiff;
Commit import of OpenBSD-stable fix: Fix by dhartmei@ and mcbride@ 1.433 Properly m_copyback() modified TCP sequence number after demodulation 1.432 Fix icmp checksum when sequence number modlation is being used. Also fix a daddr vs saddr cut-n-paste error in ICMP error handling. Fixes PR 3724 Obtained from: OpenBSD Reviewed by: dhartmei Approved by: rwatson
2004-04-11 17:35:40 +00:00
if (src->seqdiff) {
pf_change_a(&th.th_seq, icmpsum,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
htonl(seq), 0);
Commit import of OpenBSD-stable fix: Fix by dhartmei@ and mcbride@ 1.433 Properly m_copyback() modified TCP sequence number after demodulation 1.432 Fix icmp checksum when sequence number modlation is being used. Also fix a daddr vs saddr cut-n-paste error in ICMP error handling. Fixes PR 3724 Obtained from: OpenBSD Reviewed by: dhartmei Approved by: rwatson
2004-04-11 17:35:40 +00:00
copyback = 1;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (!SEQ_GEQ(src->seqhi, seq) ||
!SEQ_GEQ(seq, src->seqlo - (dst->max_win << dws))) {
if (pf_status.debug >= PF_DEBUG_MISC) {
printf("pf: BAD ICMP %d:%d ",
icmptype, pd->hdr.icmp->icmp_code);
pf_print_host(pd->src, 0, pd->af);
printf(" -> ");
pf_print_host(pd->dst, 0, pd->af);
printf(" state: ");
pf_print_state(*state);
printf(" seq=%u\n", seq);
}
return (PF_DROP);
}
if (STATE_TRANSLATE(*state)) {
if (direction == PF_IN) {
pf_change_icmp(pd2.src, &th.th_sport,
Commit import of OpenBSD-stable fix: Fix by dhartmei@ and mcbride@ 1.433 Properly m_copyback() modified TCP sequence number after demodulation 1.432 Fix icmp checksum when sequence number modlation is being used. Also fix a daddr vs saddr cut-n-paste error in ICMP error handling. Fixes PR 3724 Obtained from: OpenBSD Reviewed by: dhartmei Approved by: rwatson
2004-04-11 17:35:40 +00:00
daddr, &(*state)->lan.addr,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
(*state)->lan.port, NULL,
pd2.ip_sum, icmpsum,
pd->ip_sum, 0, pd2.af);
} else {
pf_change_icmp(pd2.dst, &th.th_dport,
saddr, &(*state)->gwy.addr,
(*state)->gwy.port, NULL,
pd2.ip_sum, icmpsum,
pd->ip_sum, 0, pd2.af);
}
Commit import of OpenBSD-stable fix: Fix by dhartmei@ and mcbride@ 1.433 Properly m_copyback() modified TCP sequence number after demodulation 1.432 Fix icmp checksum when sequence number modlation is being used. Also fix a daddr vs saddr cut-n-paste error in ICMP error handling. Fixes PR 3724 Obtained from: OpenBSD Reviewed by: dhartmei Approved by: rwatson
2004-04-11 17:35:40 +00:00
copyback = 1;
}
if (copyback) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
switch (pd2.af) {
#ifdef INET
case AF_INET:
m_copyback(m, off, ICMP_MINLEN,
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)pd->hdr.icmp);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
m_copyback(m, ipoff2, sizeof(h2),
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)&h2);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
m_copyback(m, off,
sizeof(struct icmp6_hdr),
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)pd->hdr.icmp6);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
m_copyback(m, ipoff2, sizeof(h2_6),
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)&h2_6);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET6 */
}
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
m_copyback(m, off2, 8, (caddr_t)&th);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
return (PF_PASS);
break;
}
case IPPROTO_UDP: {
struct udphdr uh;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state key;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (!pf_pull_hdr(m, off2, &uh, sizeof(uh),
NULL, NULL, pd2.af)) {
DPFPRINTF(PF_DEBUG_MISC,
("pf: ICMP error message too short "
"(udp)\n"));
return (PF_DROP);
}
key.af = pd2.af;
key.proto = IPPROTO_UDP;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (direction == PF_IN) {
PF_ACPY(&key.ext.addr, pd2.dst, key.af);
PF_ACPY(&key.gwy.addr, pd2.src, key.af);
key.ext.port = uh.uh_dport;
key.gwy.port = uh.uh_sport;
} else {
PF_ACPY(&key.lan.addr, pd2.dst, key.af);
PF_ACPY(&key.ext.addr, pd2.src, key.af);
key.lan.port = uh.uh_dport;
key.ext.port = uh.uh_sport;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
STATE_LOOKUP();
if (STATE_TRANSLATE(*state)) {
if (direction == PF_IN) {
pf_change_icmp(pd2.src, &uh.uh_sport,
daddr, &(*state)->lan.addr,
(*state)->lan.port, &uh.uh_sum,
pd2.ip_sum, icmpsum,
pd->ip_sum, 1, pd2.af);
} else {
pf_change_icmp(pd2.dst, &uh.uh_dport,
saddr, &(*state)->gwy.addr,
(*state)->gwy.port, &uh.uh_sum,
pd2.ip_sum, icmpsum,
pd->ip_sum, 1, pd2.af);
}
switch (pd2.af) {
#ifdef INET
case AF_INET:
m_copyback(m, off, ICMP_MINLEN,
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)pd->hdr.icmp);
m_copyback(m, ipoff2, sizeof(h2),
(caddr_t)&h2);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
m_copyback(m, off,
sizeof(struct icmp6_hdr),
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)pd->hdr.icmp6);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
m_copyback(m, ipoff2, sizeof(h2_6),
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)&h2_6);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET6 */
}
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
m_copyback(m, off2, sizeof(uh),
(caddr_t)&uh);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
return (PF_PASS);
break;
}
#ifdef INET
case IPPROTO_ICMP: {
struct icmp iih;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state key;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (!pf_pull_hdr(m, off2, &iih, ICMP_MINLEN,
NULL, NULL, pd2.af)) {
DPFPRINTF(PF_DEBUG_MISC,
("pf: ICMP error message too short i"
"(icmp)\n"));
return (PF_DROP);
}
key.af = pd2.af;
key.proto = IPPROTO_ICMP;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (direction == PF_IN) {
PF_ACPY(&key.ext.addr, pd2.dst, key.af);
PF_ACPY(&key.gwy.addr, pd2.src, key.af);
key.ext.port = iih.icmp_id;
key.gwy.port = iih.icmp_id;
} else {
PF_ACPY(&key.lan.addr, pd2.dst, key.af);
PF_ACPY(&key.ext.addr, pd2.src, key.af);
key.lan.port = iih.icmp_id;
key.ext.port = iih.icmp_id;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
STATE_LOOKUP();
if (STATE_TRANSLATE(*state)) {
if (direction == PF_IN) {
pf_change_icmp(pd2.src, &iih.icmp_id,
daddr, &(*state)->lan.addr,
(*state)->lan.port, NULL,
pd2.ip_sum, icmpsum,
pd->ip_sum, 0, AF_INET);
} else {
pf_change_icmp(pd2.dst, &iih.icmp_id,
saddr, &(*state)->gwy.addr,
(*state)->gwy.port, NULL,
pd2.ip_sum, icmpsum,
pd->ip_sum, 0, AF_INET);
}
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
m_copyback(m, off, ICMP_MINLEN,
(caddr_t)pd->hdr.icmp);
m_copyback(m, ipoff2, sizeof(h2),
(caddr_t)&h2);
m_copyback(m, off2, ICMP_MINLEN,
(caddr_t)&iih);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
return (PF_PASS);
break;
}
#endif /* INET */
#ifdef INET6
case IPPROTO_ICMPV6: {
struct icmp6_hdr iih;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state key;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (!pf_pull_hdr(m, off2, &iih,
sizeof(struct icmp6_hdr), NULL, NULL, pd2.af)) {
DPFPRINTF(PF_DEBUG_MISC,
("pf: ICMP error message too short "
"(icmp6)\n"));
return (PF_DROP);
}
key.af = pd2.af;
key.proto = IPPROTO_ICMPV6;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (direction == PF_IN) {
PF_ACPY(&key.ext.addr, pd2.dst, key.af);
PF_ACPY(&key.gwy.addr, pd2.src, key.af);
key.ext.port = iih.icmp6_id;
key.gwy.port = iih.icmp6_id;
} else {
PF_ACPY(&key.lan.addr, pd2.dst, key.af);
PF_ACPY(&key.ext.addr, pd2.src, key.af);
key.lan.port = iih.icmp6_id;
key.ext.port = iih.icmp6_id;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
STATE_LOOKUP();
if (STATE_TRANSLATE(*state)) {
if (direction == PF_IN) {
pf_change_icmp(pd2.src, &iih.icmp6_id,
daddr, &(*state)->lan.addr,
(*state)->lan.port, NULL,
pd2.ip_sum, icmpsum,
pd->ip_sum, 0, AF_INET6);
} else {
pf_change_icmp(pd2.dst, &iih.icmp6_id,
saddr, &(*state)->gwy.addr,
(*state)->gwy.port, NULL,
pd2.ip_sum, icmpsum,
pd->ip_sum, 0, AF_INET6);
}
m_copyback(m, off, sizeof(struct icmp6_hdr),
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)pd->hdr.icmp6);
m_copyback(m, ipoff2, sizeof(h2_6),
(caddr_t)&h2_6);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
m_copyback(m, off2, sizeof(struct icmp6_hdr),
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)&iih);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
return (PF_PASS);
break;
}
#endif /* INET6 */
default: {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state key;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
key.af = pd2.af;
key.proto = pd2.proto;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (direction == PF_IN) {
PF_ACPY(&key.ext.addr, pd2.dst, key.af);
PF_ACPY(&key.gwy.addr, pd2.src, key.af);
key.ext.port = 0;
key.gwy.port = 0;
} else {
PF_ACPY(&key.lan.addr, pd2.dst, key.af);
PF_ACPY(&key.ext.addr, pd2.src, key.af);
key.lan.port = 0;
key.ext.port = 0;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
STATE_LOOKUP();
if (STATE_TRANSLATE(*state)) {
if (direction == PF_IN) {
pf_change_icmp(pd2.src, NULL,
daddr, &(*state)->lan.addr,
0, NULL,
pd2.ip_sum, icmpsum,
pd->ip_sum, 0, pd2.af);
} else {
pf_change_icmp(pd2.dst, NULL,
saddr, &(*state)->gwy.addr,
0, NULL,
pd2.ip_sum, icmpsum,
pd->ip_sum, 0, pd2.af);
}
switch (pd2.af) {
#ifdef INET
case AF_INET:
m_copyback(m, off, ICMP_MINLEN,
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)pd->hdr.icmp);
m_copyback(m, ipoff2, sizeof(h2),
(caddr_t)&h2);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
m_copyback(m, off,
sizeof(struct icmp6_hdr),
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)pd->hdr.icmp6);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
m_copyback(m, ipoff2, sizeof(h2_6),
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(caddr_t)&h2_6);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
#endif /* INET6 */
}
}
return (PF_PASS);
break;
}
}
}
}
int
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_test_state_other(struct pf_state **state, int direction, struct pfi_kif *kif,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct pf_pdesc *pd)
{
struct pf_state_peer *src, *dst;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_state key;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
key.af = pd->af;
key.proto = pd->proto;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (direction == PF_IN) {
PF_ACPY(&key.ext.addr, pd->src, key.af);
PF_ACPY(&key.gwy.addr, pd->dst, key.af);
key.ext.port = 0;
key.gwy.port = 0;
} else {
PF_ACPY(&key.lan.addr, pd->src, key.af);
PF_ACPY(&key.ext.addr, pd->dst, key.af);
key.lan.port = 0;
key.ext.port = 0;
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
STATE_LOOKUP();
if (direction == (*state)->direction) {
src = &(*state)->src;
dst = &(*state)->dst;
} else {
src = &(*state)->dst;
dst = &(*state)->src;
}
/* update states */
if (src->state < PFOTHERS_SINGLE)
src->state = PFOTHERS_SINGLE;
if (dst->state == PFOTHERS_SINGLE)
dst->state = PFOTHERS_MULTIPLE;
/* update expire time */
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
(*state)->expire = time_second;
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
(*state)->expire = time.tv_sec;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (src->state == PFOTHERS_MULTIPLE && dst->state == PFOTHERS_MULTIPLE)
(*state)->timeout = PFTM_OTHER_MULTIPLE;
else
(*state)->timeout = PFTM_OTHER_SINGLE;
/* translate source/destination address, if necessary */
if (STATE_TRANSLATE(*state)) {
if (direction == PF_OUT)
switch (pd->af) {
#ifdef INET
case AF_INET:
pf_change_a(&pd->src->v4.s_addr,
pd->ip_sum, (*state)->gwy.addr.v4.s_addr,
0);
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
PF_ACPY(pd->src, &(*state)->gwy.addr, pd->af);
break;
#endif /* INET6 */
}
else
switch (pd->af) {
#ifdef INET
case AF_INET:
pf_change_a(&pd->dst->v4.s_addr,
pd->ip_sum, (*state)->lan.addr.v4.s_addr,
0);
break;
#endif /* INET */
#ifdef INET6
case AF_INET6:
PF_ACPY(pd->dst, &(*state)->lan.addr, pd->af);
break;
#endif /* INET6 */
}
}
return (PF_PASS);
}
/*
* ipoff and off are measured from the start of the mbuf chain.
* h must be at "ipoff" on the mbuf chain.
*/
void *
pf_pull_hdr(struct mbuf *m, int off, void *p, int len,
u_short *actionp, u_short *reasonp, sa_family_t af)
{
switch (af) {
#ifdef INET
case AF_INET: {
struct ip *h = mtod(m, struct ip *);
u_int16_t fragoff = (ntohs(h->ip_off) & IP_OFFMASK) << 3;
if (fragoff) {
if (fragoff >= len)
ACTION_SET(actionp, PF_PASS);
else {
ACTION_SET(actionp, PF_DROP);
REASON_SET(reasonp, PFRES_FRAG);
}
return (NULL);
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (m->m_pkthdr.len < off + len ||
ntohs(h->ip_len) < off + len) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
ACTION_SET(actionp, PF_DROP);
REASON_SET(reasonp, PFRES_SHORT);
return (NULL);
}
break;
}
#endif /* INET */
#ifdef INET6
case AF_INET6: {
struct ip6_hdr *h = mtod(m, struct ip6_hdr *);
if (m->m_pkthdr.len < off + len ||
(ntohs(h->ip6_plen) + sizeof(struct ip6_hdr)) <
(unsigned)(off + len)) {
ACTION_SET(actionp, PF_DROP);
REASON_SET(reasonp, PFRES_SHORT);
return (NULL);
}
break;
}
#endif /* INET6 */
}
m_copydata(m, off, len, p);
return (p);
}
int
pf_routable(struct pf_addr *addr, sa_family_t af)
{
struct sockaddr_in *dst;
struct route ro;
int ret = 0;
bzero(&ro, sizeof(ro));
dst = satosin(&ro.ro_dst);
dst->sin_family = af;
dst->sin_len = sizeof(*dst);
dst->sin_addr = addr->v4;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#ifdef RTF_PRCLONING
rtalloc_ign(&ro, (RTF_CLONING|RTF_PRCLONING));
#else /* !RTF_PRCLONING */
rtalloc_ign(&ro, RTF_CLONING);
#endif
#else /* ! __FreeBSD__ */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
rtalloc_noclone(&ro, NO_CLONING);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (ro.ro_rt != NULL) {
ret = 1;
RTFREE(ro.ro_rt);
}
return (ret);
}
#ifdef INET
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
void
pf_route(struct mbuf **m, struct pf_rule *r, int dir, struct ifnet *oifp,
struct pf_state *s)
{
struct mbuf *m0, *m1;
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
struct m_tag *mtag;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct route iproute;
Shut up a couple of annoying gcc warnings. Do not enclose the fixes with #ifdefs in order to loop it back to OpenBSD after the next import. There are a some implicit asserts involved which might be better spelled out explicitly (af == AF_INET ...) Approved by: bms(mentor)
2004-03-30 18:28:30 +00:00
struct route *ro = NULL; /* XXX: was uninitialized */
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
struct sockaddr_in *dst;
struct ip *ip;
struct ifnet *ifp = NULL;
struct pf_addr naddr;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_src_node *sn = NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
int error = 0;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
int sw_csum;
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (m == NULL || *m == NULL || r == NULL ||
(dir != PF_IN && dir != PF_OUT) || oifp == NULL)
panic("pf_route: invalid parameters");
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
if ((mtag = m_tag_find(*m, PACKET_TAG_PF_ROUTED, NULL)) == NULL) {
if ((mtag = m_tag_get(PACKET_TAG_PF_ROUTED, 1, M_NOWAIT)) ==
NULL) {
m0 = *m;
*m = NULL;
goto bad;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
*(char *)(mtag + 1) = 1;
m_tag_prepend(*m, mtag);
} else {
if (*(char *)(mtag + 1) > 3) {
m0 = *m;
*m = NULL;
goto bad;
}
(*(char *)(mtag + 1))++;
}
if (r->rt == PF_DUPTO) {
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
if ((m0 = m_dup(*m, M_DONTWAIT)) == NULL)
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#else
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
if ((m0 = m_copym2(*m, 0, M_COPYALL, M_NOWAIT)) == NULL)
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return;
m_tag_copy takes an additional "how" parameter in FreeBSD. Submitted by: rwatson
2004-07-18 00:51:56 +00:00
#ifdef __FreeBSD__
if ((mtag = m_tag_copy(mtag, M_DONTWAIT)) == NULL)
#else
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
if ((mtag = m_tag_copy(mtag)) == NULL)
m_tag_copy takes an additional "how" parameter in FreeBSD. Submitted by: rwatson
2004-07-18 00:51:56 +00:00
#endif
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
goto bad;
m_tag_prepend(m0, mtag);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
} else {
if ((r->rt == PF_REPLYTO) == (r->direction == dir))
return;
m0 = *m;
}
if (m0->m_len < sizeof(struct ip))
panic("pf_route: m0->m_len < sizeof(struct ip)");
ip = mtod(m0, struct ip *);
ro = &iproute;
bzero((caddr_t)ro, sizeof(*ro));
dst = satosin(&ro->ro_dst);
dst->sin_family = AF_INET;
dst->sin_len = sizeof(*dst);
dst->sin_addr = ip->ip_dst;
if (r->rt == PF_FASTROUTE) {
rtalloc(ro);
if (ro->ro_rt == 0) {
ipstat.ips_noroute++;
goto bad;
}
ifp = ro->ro_rt->rt_ifp;
ro->ro_rt->rt_use++;
if (ro->ro_rt->rt_flags & RTF_GATEWAY)
dst = satosin(ro->ro_rt->rt_gateway);
} else {
if (TAILQ_EMPTY(&r->rpool.list))
panic("pf_route: TAILQ_EMPTY(&r->rpool.list)");
if (s == NULL) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_map_addr(AF_INET, r, (struct pf_addr *)&ip->ip_src,
&naddr, NULL, &sn);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (!PF_AZERO(&naddr, AF_INET))
dst->sin_addr.s_addr = naddr.v4.s_addr;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
ifp = r->rpool.cur->kif ?
r->rpool.cur->kif->pfik_ifp : NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
} else {
if (!PF_AZERO(&s->rt_addr, AF_INET))
dst->sin_addr.s_addr =
s->rt_addr.v4.s_addr;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
ifp = s->rt_kif ? s->rt_kif->pfik_ifp : NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
}
if (ifp == NULL)
goto bad;
Import two fixes from the OpenBSD stable branch: - prevent an endless loop with route-to lo0, fixes PR 3736 (dhartmei@) - The rule_number parameter for pf_get_pool() needs to be 32 bits, not 8 - this fixes corruption of the address pools with large rulesets. (mcbride@, pb@) Reviewed-by: dhartmei
2004-06-17 16:59:47 +00:00
if (oifp != ifp) {
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_UNLOCK();
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
if (pf_test(PF_OUT, ifp, &m0, NULL) != PF_PASS) {
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_LOCK();
goto bad;
} else if (m0 == NULL) {
PF_LOCK();
goto done;
}
PF_LOCK();
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (pf_test(PF_OUT, ifp, &m0) != PF_PASS)
goto bad;
else if (m0 == NULL)
goto done;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (m0->m_len < sizeof(struct ip))
panic("pf_route: m0->m_len < sizeof(struct ip)");
ip = mtod(m0, struct ip *);
}
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
/* Copied from FreeBSD 5.1-CURRENT ip_output. */
m0->m_pkthdr.csum_flags |= CSUM_IP;
sw_csum = m0->m_pkthdr.csum_flags & ~ifp->if_hwassist;
if (sw_csum & CSUM_DELAY_DATA) {
/*
* XXX: in_delayed_cksum assumes HBO for ip->ip_len (at least)
*/
NTOHS(ip->ip_len);
NTOHS(ip->ip_off); /* XXX: needed? */
in_delayed_cksum(m0);
HTONS(ip->ip_len);
HTONS(ip->ip_off);
sw_csum &= ~CSUM_DELAY_DATA;
}
m0->m_pkthdr.csum_flags &= ifp->if_hwassist;
if (ntohs(ip->ip_len) <= ifp->if_mtu ||
(ifp->if_hwassist & CSUM_FRAGMENT &&
((ip->ip_off & htons(IP_DF)) == 0))) {
/*
* ip->ip_len = htons(ip->ip_len);
* ip->ip_off = htons(ip->ip_off);
*/
ip->ip_sum = 0;
if (sw_csum & CSUM_DELAY_IP) {
/* From KAME */
if (ip->ip_v == IPVERSION &&
(ip->ip_hl << 2) == sizeof(*ip)) {
ip->ip_sum = in_cksum_hdr(ip);
} else {
ip->ip_sum = in_cksum(m0, ip->ip_hl << 2);
}
}
PF_UNLOCK();
error = (*ifp->if_output)(ifp, m0, sintosa(dst), ro->ro_rt);
PF_LOCK();
goto done;
}
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
/* Copied from ip_output. */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#ifdef IPSEC
/*
* If deferred crypto processing is needed, check that the
* interface supports it.
*/
if ((mtag = m_tag_find(m0, PACKET_TAG_IPSEC_OUT_CRYPTO_NEEDED, NULL))
!= NULL && (ifp->if_capabilities & IFCAP_IPSEC) == 0) {
/* Notify IPsec to do its own crypto. */
ipsp_skipcrypto_unmark((struct tdb_ident *)(mtag + 1));
goto bad;
}
#endif /* IPSEC */
/* Catch routing changes wrt. hardware checksumming for TCP or UDP. */
if (m0->m_pkthdr.csum & M_TCPV4_CSUM_OUT) {
if (!(ifp->if_capabilities & IFCAP_CSUM_TCPv4) ||
ifp->if_bridge != NULL) {
in_delayed_cksum(m0);
m0->m_pkthdr.csum &= ~M_TCPV4_CSUM_OUT; /* Clear */
}
} else if (m0->m_pkthdr.csum & M_UDPV4_CSUM_OUT) {
if (!(ifp->if_capabilities & IFCAP_CSUM_UDPv4) ||
ifp->if_bridge != NULL) {
in_delayed_cksum(m0);
m0->m_pkthdr.csum &= ~M_UDPV4_CSUM_OUT; /* Clear */
}
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (ntohs(ip->ip_len) <= ifp->if_mtu) {
if ((ifp->if_capabilities & IFCAP_CSUM_IPv4) &&
ifp->if_bridge == NULL) {
m0->m_pkthdr.csum |= M_IPV4_CSUM_OUT;
ipstat.ips_outhwcsum++;
} else {
ip->ip_sum = 0;
ip->ip_sum = in_cksum(m0, ip->ip_hl << 2);
}
/* Update relevant hardware checksum stats for TCP/UDP */
if (m0->m_pkthdr.csum & M_TCPV4_CSUM_OUT)
tcpstat.tcps_outhwcsum++;
else if (m0->m_pkthdr.csum & M_UDPV4_CSUM_OUT)
udpstat.udps_outhwcsum++;
error = (*ifp->if_output)(ifp, m0, sintosa(dst), NULL);
goto done;
}
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
/*
* Too large for interface; fragment if possible.
* Must be able to put at least 8 bytes per fragment.
*/
if (ip->ip_off & htons(IP_DF)) {
ipstat.ips_cantfrag++;
if (r->rt != PF_DUPTO) {
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
/* icmp_error() expects host byte ordering */
NTOHS(ip->ip_len);
NTOHS(ip->ip_off);
PF_UNLOCK();
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
icmp_error(m0, ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG, 0,
ifp);
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_LOCK();
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
goto done;
} else
goto bad;
}
m1 = m0;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
/*
* XXX: is cheaper + less error prone than own function
*/
NTOHS(ip->ip_len);
NTOHS(ip->ip_off);
error = ip_fragment(ip, &m0, ifp->if_mtu, ifp->if_hwassist, sw_csum);
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
error = ip_fragment(m0, ifp, ifp->if_mtu);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Commit two fixes from OpenBSD's stable branch: - Fix binat for incoming connections when a netblock (not just a single address) is used for source in the binat rule. closes PR 3535, reported by Karl O.Pinc. ok henning@, cedric@ - Fix a problem related to empty anchor rulesets, which could cause a kernel panic. Approved by: bms(mentor)
2004-03-28 20:04:12 +00:00
if (error) {
#ifndef __FreeBSD__ /* ip_fragment does not do m_freem() on FreeBSD */
m0 = NULL;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
goto bad;
Commit two fixes from OpenBSD's stable branch: - Fix binat for incoming connections when a netblock (not just a single address) is used for source in the binat rule. closes PR 3535, reported by Karl O.Pinc. ok henning@, cedric@ - Fix a problem related to empty anchor rulesets, which could cause a kernel panic. Approved by: bms(mentor)
2004-03-28 20:04:12 +00:00
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
for (m0 = m1; m0; m0 = m1) {
m1 = m0->m_nextpkt;
m0->m_nextpkt = 0;
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
if (error == 0) {
PF_UNLOCK();
error = (*ifp->if_output)(ifp, m0, sintosa(dst),
NULL);
PF_LOCK();
} else
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (error == 0)
error = (*ifp->if_output)(ifp, m0, sintosa(dst),
NULL);
else
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
m_freem(m0);
}
if (error == 0)
ipstat.ips_fragmented++;
done:
if (r->rt != PF_DUPTO)
*m = NULL;
if (ro == &iproute && ro->ro_rt)
RTFREE(ro->ro_rt);
return;
bad:
m_freem(m0);
goto done;
}
#endif /* INET */
#ifdef INET6
void
pf_route6(struct mbuf **m, struct pf_rule *r, int dir, struct ifnet *oifp,
struct pf_state *s)
{
struct mbuf *m0;
struct m_tag *mtag;
struct route_in6 ip6route;
struct route_in6 *ro;
struct sockaddr_in6 *dst;
struct ip6_hdr *ip6;
struct ifnet *ifp = NULL;
struct pf_addr naddr;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pf_src_node *sn = NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
int error = 0;
if (m == NULL || *m == NULL || r == NULL ||
(dir != PF_IN && dir != PF_OUT) || oifp == NULL)
panic("pf_route6: invalid parameters");
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
if ((mtag = m_tag_find(*m, PACKET_TAG_PF_ROUTED, NULL)) == NULL) {
if ((mtag = m_tag_get(PACKET_TAG_PF_ROUTED, 1, M_NOWAIT)) ==
NULL) {
m0 = *m;
*m = NULL;
goto bad;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
*(char *)(mtag + 1) = 1;
m_tag_prepend(*m, mtag);
} else {
if (*(char *)(mtag + 1) > 3) {
m0 = *m;
*m = NULL;
goto bad;
}
(*(char *)(mtag + 1))++;
}
if (r->rt == PF_DUPTO) {
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
if ((m0 = m_dup(*m, M_DONTWAIT)) == NULL)
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#else
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
if ((m0 = m_copym2(*m, 0, M_COPYALL, M_NOWAIT)) == NULL)
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return;
m_tag_copy takes an additional "how" parameter in FreeBSD. Submitted by: rwatson
2004-07-18 00:51:56 +00:00
#ifdef __FreeBSD__
if ((mtag = m_tag_copy(mtag, M_DONTWAIT)) == NULL)
#else
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
if ((mtag = m_tag_copy(mtag)) == NULL)
m_tag_copy takes an additional "how" parameter in FreeBSD. Submitted by: rwatson
2004-07-18 00:51:56 +00:00
#endif
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
goto bad;
m_tag_prepend(m0, mtag);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
} else {
if ((r->rt == PF_REPLYTO) == (r->direction == dir))
return;
m0 = *m;
}
if (m0->m_len < sizeof(struct ip6_hdr))
panic("pf_route6: m0->m_len < sizeof(struct ip6_hdr)");
ip6 = mtod(m0, struct ip6_hdr *);
ro = &ip6route;
bzero((caddr_t)ro, sizeof(*ro));
dst = (struct sockaddr_in6 *)&ro->ro_dst;
dst->sin6_family = AF_INET6;
dst->sin6_len = sizeof(*dst);
dst->sin6_addr = ip6->ip6_dst;
/* Cheat. */
if (r->rt == PF_FASTROUTE) {
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
m0->m_flags |= M_SKIP_FIREWALL;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_UNLOCK();
ip6_output(m0, NULL, NULL, 0, NULL, NULL, NULL);
PF_LOCK();
#else
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
mtag = m_tag_get(PACKET_TAG_PF_GENERATED, 0, M_NOWAIT);
if (mtag == NULL)
goto bad;
m_tag_prepend(m0, mtag);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
ip6_output(m0, NULL, NULL, 0, NULL, NULL);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return;
}
if (TAILQ_EMPTY(&r->rpool.list))
panic("pf_route6: TAILQ_EMPTY(&r->rpool.list)");
if (s == NULL) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_map_addr(AF_INET6, r, (struct pf_addr *)&ip6->ip6_src,
&naddr, NULL, &sn);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (!PF_AZERO(&naddr, AF_INET6))
PF_ACPY((struct pf_addr *)&dst->sin6_addr,
&naddr, AF_INET6);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
ifp = r->rpool.cur->kif ? r->rpool.cur->kif->pfik_ifp : NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
} else {
if (!PF_AZERO(&s->rt_addr, AF_INET6))
PF_ACPY((struct pf_addr *)&dst->sin6_addr,
&s->rt_addr, AF_INET6);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
ifp = s->rt_kif ? s->rt_kif->pfik_ifp : NULL;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
if (ifp == NULL)
goto bad;
if (oifp != ifp) {
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
PF_UNLOCK();
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
if (pf_test6(PF_OUT, ifp, &m0, NULL) != PF_PASS) {
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
PF_LOCK();
goto bad;
} else if (m0 == NULL) {
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_LOCK();
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
goto done;
}
PF_LOCK();
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#else
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
if (pf_test6(PF_OUT, ifp, &m0) != PF_PASS)
goto bad;
else if (m0 == NULL)
goto done;
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Merge in a stable fix from OpenBSD: MFC: Fix by dhartmei@ change pf_route() loop detection: introduce a counter (number of times a packet is routed already) in the mbuf tag, allow at most four times. Fixes some legitimate cases broken by the previous change. Reviewed by: dhartmei
2004-07-17 17:15:15 +00:00
if (m0->m_len < sizeof(struct ip6_hdr))
panic("pf_route6: m0->m_len < sizeof(struct ip6_hdr)");
ip6 = mtod(m0, struct ip6_hdr *);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
}
/*
* If the packet is too large for the outgoing interface,
* send back an icmp6 error.
*/
if (IN6_IS_ADDR_LINKLOCAL(&dst->sin6_addr))
dst->sin6_addr.s6_addr16[1] = htons(ifp->if_index);
if ((u_long)m0->m_pkthdr.len <= ifp->if_mtu) {
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_UNLOCK();
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
error = nd6_output(ifp, ifp, m0, dst, NULL);
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_LOCK();
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
} else {
in6_ifstat_inc(ifp, ifs6_in_toobig);
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
if (r->rt != PF_DUPTO) {
PF_UNLOCK();
icmp6_error(m0, ICMP6_PACKET_TOO_BIG, 0, ifp->if_mtu);
PF_LOCK();
} else
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (r->rt != PF_DUPTO)
icmp6_error(m0, ICMP6_PACKET_TOO_BIG, 0, ifp->if_mtu);
else
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
goto bad;
}
done:
if (r->rt != PF_DUPTO)
*m = NULL;
return;
bad:
m_freem(m0);
goto done;
}
#endif /* INET6 */
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
/*
Refine pf_check_proto_cksum() a bit in order to avoid additional in_pseudo() calls further down the stack. If we find the cksum to be okay we pretend that the hardware did all the work and hence keep the upper layers from checking again. Submitted by: Pyun YongHyeon
2004-07-23 03:31:42 +00:00
* FreeBSD supports cksum offloads for the following drivers.
Removed the remnants of gx(4).
2004-11-08 20:24:52 +00:00
* em(4), fxp(4), ixgb(4), lge(4), ndis(4), nge(4), re(4),
Refine pf_check_proto_cksum() a bit in order to avoid additional in_pseudo() calls further down the stack. If we find the cksum to be okay we pretend that the hardware did all the work and hence keep the upper layers from checking again. Submitted by: Pyun YongHyeon
2004-07-23 03:31:42 +00:00
* ti(4), txp(4), xl(4)
*
* CSUM_DATA_VALID | CSUM_PSEUDO_HDR :
* network driver performed cksum including pseudo header, need to verify
* csum_data
* CSUM_DATA_VALID :
* network driver performed cksum, needs to additional pseudo header
* cksum computation with partial csum_data(i.e. lack of H/W support for
* pseudo header, for instance hme(4), sk(4) and possibly gem(4))
*
* After validating the cksum of packet, set both flag CSUM_DATA_VALID and
* CSUM_PSEUDO_HDR in order to avoid recomputation of the cksum in upper
* TCP/UDP layer.
* Also, set csum_data to 0xffff to force cksum validation.
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
*/
int
pf_check_proto_cksum(struct mbuf *m, int off, int len, u_int8_t p, sa_family_t af)
{
u_int16_t sum = 0;
int hw_assist = 0;
struct ip *ip;
if (off < sizeof(struct ip) || len < sizeof(struct udphdr))
return (1);
if (m->m_pkthdr.len < off + len)
return (1);
switch (p) {
case IPPROTO_TCP:
if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) {
if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) {
sum = m->m_pkthdr.csum_data;
} else {
ip = mtod(m, struct ip *);
sum = in_pseudo(ip->ip_src.s_addr,
One more round on the H/W supported checksum code: Fix NICs that can't do the pseudo header. We really need the TCP packet length here. This happens to end up in ip->ip_len in tcp_input.c, but here we should get it from the len function variable instead. Submitted by: yongari Tested by: Nicolas Linard, yongari (sparc64 + hme) MFC after: 5 days
2004-09-11 11:18:25 +00:00
ip->ip_dst.s_addr, htonl((u_short)len +
m->m_pkthdr.csum_data + IPPROTO_TCP));
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
}
sum ^= 0xffff;
++hw_assist;
}
break;
case IPPROTO_UDP:
if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) {
if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) {
sum = m->m_pkthdr.csum_data;
} else {
ip = mtod(m, struct ip *);
sum = in_pseudo(ip->ip_src.s_addr,
ip->ip_dst.s_addr, htonl((u_short)len +
m->m_pkthdr.csum_data + IPPROTO_UDP));
}
sum ^= 0xffff;
++hw_assist;
}
break;
case IPPROTO_ICMP:
#ifdef INET6
case IPPROTO_ICMPV6:
#endif /* INET6 */
break;
default:
return (1);
}
if (!hw_assist) {
switch (af) {
case AF_INET:
if (p == IPPROTO_ICMP) {
if (m->m_len < off)
return (1);
m->m_data += off;
m->m_len -= off;
sum = in_cksum(m, len);
m->m_data -= off;
m->m_len += off;
} else {
if (m->m_len < sizeof(struct ip))
return (1);
sum = in4_cksum(m, p, off, len);
}
break;
#ifdef INET6
case AF_INET6:
if (m->m_len < sizeof(struct ip6_hdr))
return (1);
sum = in6_cksum(m, p, off, len);
break;
#endif /* INET6 */
default:
return (1);
}
}
if (sum) {
switch (p) {
case IPPROTO_TCP:
tcpstat.tcps_rcvbadsum++;
break;
case IPPROTO_UDP:
udpstat.udps_badsum++;
break;
case IPPROTO_ICMP:
icmpstat.icps_checksum++;
break;
#ifdef INET6
case IPPROTO_ICMPV6:
icmp6stat.icp6s_checksum++;
break;
#endif /* INET6 */
}
return (1);
Refine pf_check_proto_cksum() a bit in order to avoid additional in_pseudo() calls further down the stack. If we find the cksum to be okay we pretend that the hardware did all the work and hence keep the upper layers from checking again. Submitted by: Pyun YongHyeon
2004-07-23 03:31:42 +00:00
} else {
if (p == IPPROTO_TCP || p == IPPROTO_UDP) {
m->m_pkthdr.csum_flags |=
(CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
m->m_pkthdr.csum_data = 0xffff;
}
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
}
return (0);
}
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
/*
* check protocol (tcp/udp/icmp/icmp6) checksum and set mbuf flag
* off is the offset where the protocol header starts
* len is the total length of protocol header plus payload
* returns 0 when the checksum is valid, otherwise returns 1.
*/
int
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
pf_check_proto_cksum(struct mbuf *m, int off, int len, u_int8_t p,
sa_family_t af)
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
u_int16_t flag_ok, flag_bad;
u_int16_t sum;
switch (p) {
case IPPROTO_TCP:
flag_ok = M_TCP_CSUM_IN_OK;
flag_bad = M_TCP_CSUM_IN_BAD;
break;
case IPPROTO_UDP:
flag_ok = M_UDP_CSUM_IN_OK;
flag_bad = M_UDP_CSUM_IN_BAD;
break;
case IPPROTO_ICMP:
#ifdef INET6
case IPPROTO_ICMPV6:
#endif /* INET6 */
flag_ok = flag_bad = 0;
break;
default:
return (1);
}
if (m->m_pkthdr.csum & flag_ok)
return (0);
if (m->m_pkthdr.csum & flag_bad)
return (1);
if (off < sizeof(struct ip) || len < sizeof(struct udphdr))
return (1);
if (m->m_pkthdr.len < off + len)
return (1);
switch (af) {
case AF_INET:
if (p == IPPROTO_ICMP) {
if (m->m_len < off)
return (1);
m->m_data += off;
m->m_len -= off;
sum = in_cksum(m, len);
m->m_data -= off;
m->m_len += off;
} else {
if (m->m_len < sizeof(struct ip))
return (1);
sum = in4_cksum(m, p, off, len);
}
break;
#ifdef INET6
case AF_INET6:
if (m->m_len < sizeof(struct ip6_hdr))
return (1);
sum = in6_cksum(m, p, off, len);
break;
#endif /* INET6 */
default:
return (1);
}
if (sum) {
m->m_pkthdr.csum |= flag_bad;
switch (p) {
case IPPROTO_TCP:
tcpstat.tcps_rcvbadsum++;
break;
case IPPROTO_UDP:
udpstat.udps_badsum++;
break;
case IPPROTO_ICMP:
icmpstat.icps_checksum++;
break;
#ifdef INET6
case IPPROTO_ICMPV6:
icmp6stat.icp6s_checksum++;
break;
#endif /* INET6 */
}
return (1);
}
m->m_pkthdr.csum |= flag_ok;
return (0);
}
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
static int
pf_add_mbuf_tag(struct mbuf *m, u_int tag)
{
struct m_tag *mtag;
if (m_tag_find(m, tag, NULL) != NULL)
return (0);
mtag = m_tag_get(tag, 0, M_NOWAIT);
if (mtag == NULL)
return (1);
m_tag_prepend(m, mtag);
return (0);
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#ifdef INET
int
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
pf_test(int dir, struct ifnet *ifp, struct mbuf **m0, struct inpcb *inp)
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pf_test(int dir, struct ifnet *ifp, struct mbuf **m0)
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pfi_kif *kif;
u_short action, reason = 0, log = 0;
struct mbuf *m = *m0;
struct ip *h = NULL; /* make the compiler happy */
struct pf_rule *a = NULL, *r = &pf_default_rule, *tr, *nr;
struct pf_state *s = NULL;
struct pf_ruleset *ruleset = NULL;
struct pf_pdesc pd;
int off, dirndx, pqid = 0;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_LOCK();
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (!pf_status.running ||
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
(m->m_flags & M_SKIP_FIREWALL)) {
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_UNLOCK();
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
#else
(m_tag_find(m, PACKET_TAG_PF_GENERATED, NULL) != NULL)) {
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
return (PF_PASS);
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
kif = pfi_index2kif[ifp->if_index];
if (kif == NULL) {
#ifdef __FreeBSD__
PF_UNLOCK();
#endif
return (PF_DROP);
}
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
M_ASSERTPKTHDR(m);
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#ifdef DIAGNOSTIC
if ((m->m_flags & M_PKTHDR) == 0)
panic("non-M_PKTHDR is passed to pf_test");
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#endif
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
memset(&pd, 0, sizeof(pd));
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (m->m_pkthdr.len < (int)sizeof(*h)) {
action = PF_DROP;
REASON_SET(&reason, PFRES_SHORT);
log = 1;
goto done;
}
/* We do IP header normalization and packet reassembly here */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (pf_normalize_ip(m0, dir, kif, &reason) != PF_PASS) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
action = PF_DROP;
goto done;
}
m = *m0;
h = mtod(m, struct ip *);
off = h->ip_hl << 2;
if (off < (int)sizeof(*h)) {
action = PF_DROP;
REASON_SET(&reason, PFRES_SHORT);
log = 1;
goto done;
}
pd.src = (struct pf_addr *)&h->ip_src;
pd.dst = (struct pf_addr *)&h->ip_dst;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PF_ACPY(&pd.baddr, dir == PF_OUT ? pd.src : pd.dst, AF_INET);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pd.ip_sum = &h->ip_sum;
pd.proto = h->ip_p;
pd.af = AF_INET;
pd.tos = h->ip_tos;
pd.tot_len = ntohs(h->ip_len);
/* handle fragments that didn't get reassembled by normalization */
if (h->ip_off & htons(IP_MF | IP_OFFMASK)) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_test_fragment(&r, dir, kif, m, h,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
&pd, &a, &ruleset);
goto done;
}
switch (h->ip_p) {
case IPPROTO_TCP: {
struct tcphdr th;
pd.hdr.tcp = &th;
if (!pf_pull_hdr(m, off, &th, sizeof(th),
&action, &reason, AF_INET)) {
log = action != PF_PASS;
goto done;
}
if (dir == PF_IN && pf_check_proto_cksum(m, off,
ntohs(h->ip_len) - off, IPPROTO_TCP, AF_INET)) {
action = PF_DROP;
goto done;
}
pd.p_len = pd.tot_len - off - (th.th_off << 2);
if ((th.th_flags & TH_ACK) && pd.p_len == 0)
pqid = 1;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_normalize_tcp(dir, kif, m, 0, off, h, &pd);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (action == PF_DROP)
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
goto done;
action = pf_test_state_tcp(&s, dir, kif, m, off, h, &pd,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
&reason);
if (action == PF_PASS) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#if NPFSYNC
pfsync_update_state(s);
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = s->rule.ptr;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
a = s->anchor.ptr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
log = s->log;
} else if (s == NULL)
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
action = pf_test_tcp(&r, &s, dir, kif,
m, off, h, &pd, &a, &ruleset, inp);
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_test_tcp(&r, &s, dir, kif,
m, off, h, &pd, &a, &ruleset);
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
}
case IPPROTO_UDP: {
struct udphdr uh;
pd.hdr.udp = &uh;
if (!pf_pull_hdr(m, off, &uh, sizeof(uh),
&action, &reason, AF_INET)) {
log = action != PF_PASS;
goto done;
}
if (dir == PF_IN && uh.uh_sum && pf_check_proto_cksum(m,
off, ntohs(h->ip_len) - off, IPPROTO_UDP, AF_INET)) {
action = PF_DROP;
goto done;
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (uh.uh_dport == 0 ||
ntohs(uh.uh_ulen) > m->m_pkthdr.len - off ||
ntohs(uh.uh_ulen) < sizeof(struct udphdr)) {
action = PF_DROP;
goto done;
}
action = pf_test_state_udp(&s, dir, kif, m, off, h, &pd);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (action == PF_PASS) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#if NPFSYNC
pfsync_update_state(s);
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = s->rule.ptr;
a = s->anchor.ptr;
log = s->log;
} else if (s == NULL)
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
action = pf_test_udp(&r, &s, dir, kif,
m, off, h, &pd, &a, &ruleset, inp);
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_test_udp(&r, &s, dir, kif,
m, off, h, &pd, &a, &ruleset);
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
}
case IPPROTO_ICMP: {
struct icmp ih;
pd.hdr.icmp = &ih;
if (!pf_pull_hdr(m, off, &ih, ICMP_MINLEN,
&action, &reason, AF_INET)) {
log = action != PF_PASS;
goto done;
}
if (dir == PF_IN && pf_check_proto_cksum(m, off,
ntohs(h->ip_len) - off, IPPROTO_ICMP, AF_INET)) {
action = PF_DROP;
goto done;
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_test_state_icmp(&s, dir, kif, m, off, h, &pd);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (action == PF_PASS) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#if NPFSYNC
pfsync_update_state(s);
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = s->rule.ptr;
a = s->anchor.ptr;
log = s->log;
} else if (s == NULL)
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_test_icmp(&r, &s, dir, kif,
m, off, h, &pd, &a, &ruleset);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
}
default:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_test_state_other(&s, dir, kif, &pd);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (action == PF_PASS) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#if NPFSYNC
pfsync_update_state(s);
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = s->rule.ptr;
a = s->anchor.ptr;
log = s->log;
} else if (s == NULL)
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_test_other(&r, &s, dir, kif, m, off, h,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
&pd, &a, &ruleset);
break;
}
done:
if (action == PF_PASS && h->ip_hl > 5 &&
!((s && s->allow_opts) || r->allow_opts)) {
action = PF_DROP;
REASON_SET(&reason, PFRES_SHORT);
log = 1;
DPFPRINTF(PF_DEBUG_MISC,
("pf: dropping packet with ip options\n"));
}
#ifdef ALTQ
if (action == PF_PASS && r->qid) {
struct m_tag *mtag;
struct altq_tag *atag;
mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT);
if (mtag != NULL) {
atag = (struct altq_tag *)(mtag + 1);
if (pqid || pd.tos == IPTOS_LOWDELAY)
atag->qid = r->pqid;
else
atag->qid = r->qid;
/* add hints for ecn */
atag->af = AF_INET;
atag->hdr = h;
m_tag_prepend(m, mtag);
}
}
#endif
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
/*
* connections redirected to loopback should not match sockets
* bound specifically to loopback due to security implications,
* see tcp_input() and in_pcblookup_listen().
*/
if (dir == PF_IN && action == PF_PASS && (pd.proto == IPPROTO_TCP ||
pd.proto == IPPROTO_UDP) && s != NULL && s->nat_rule.ptr != NULL &&
(s->nat_rule.ptr->action == PF_RDR ||
s->nat_rule.ptr->action == PF_BINAT) &&
(ntohl(pd.dst->v4.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET &&
pf_add_mbuf_tag(m, PACKET_TAG_PF_TRANSLATE_LOCALHOST)) {
action = PF_DROP;
REASON_SET(&reason, PFRES_MEMORY);
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (log)
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PFLOG_PACKET(kif, h, m, AF_INET, dir, reason, r, a, ruleset);
kif->pfik_bytes[0][dir == PF_OUT][action != PF_PASS] += pd.tot_len;
kif->pfik_packets[0][dir == PF_OUT][action != PF_PASS]++;
if (action == PF_PASS || r->action == PF_DROP) {
r->packets++;
r->bytes += pd.tot_len;
if (a != NULL) {
a->packets++;
a->bytes += pd.tot_len;
}
if (s != NULL) {
dirndx = (dir == s->direction) ? 0 : 1;
s->packets[dirndx]++;
s->bytes[dirndx] += pd.tot_len;
if (s->nat_rule.ptr != NULL) {
s->nat_rule.ptr->packets++;
s->nat_rule.ptr->bytes += pd.tot_len;
}
if (s->src_node != NULL) {
s->src_node->packets++;
s->src_node->bytes += pd.tot_len;
}
if (s->nat_src_node != NULL) {
s->nat_src_node->packets++;
s->nat_src_node->bytes += pd.tot_len;
}
}
tr = r;
nr = (s != NULL) ? s->nat_rule.ptr : pd.nat_rule;
if (nr != NULL) {
struct pf_addr *x;
/*
* XXX: we need to make sure that the addresses
* passed to pfr_update_stats() are the same than
* the addresses used during matching (pfr_match)
*/
if (r == &pf_default_rule) {
tr = nr;
x = (s == NULL || s->direction == dir) ?
&pd.baddr : &pd.naddr;
} else
x = (s == NULL || s->direction == dir) ?
&pd.naddr : &pd.baddr;
if (x == &pd.baddr || s == NULL) {
/* we need to change the address */
if (dir == PF_OUT)
pd.src = x;
else
pd.dst = x;
}
}
if (tr->src.addr.type == PF_ADDR_TABLE)
pfr_update_stats(tr->src.addr.p.tbl, (s == NULL ||
s->direction == dir) ? pd.src : pd.dst, pd.af,
pd.tot_len, dir == PF_OUT, r->action == PF_PASS,
tr->src.not);
if (tr->dst.addr.type == PF_ADDR_TABLE)
pfr_update_stats(tr->dst.addr.p.tbl, (s == NULL ||
s->direction == dir) ? pd.dst : pd.src, pd.af,
pd.tot_len, dir == PF_OUT, r->action == PF_PASS,
tr->dst.not);
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (action == PF_SYNPROXY_DROP) {
m_freem(*m0);
*m0 = NULL;
action = PF_PASS;
} else if (r->rt)
/* pf_route can free the mbuf causing *m0 to become NULL */
pf_route(m0, r, dir, ifp, s);
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_UNLOCK();
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (action);
}
#endif /* INET */
#ifdef INET6
int
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
pf_test6(int dir, struct ifnet *ifp, struct mbuf **m0, struct inpcb *inp)
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pf_test6(int dir, struct ifnet *ifp, struct mbuf **m0)
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
{
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
struct pfi_kif *kif;
u_short action, reason = 0, log = 0;
struct mbuf *m = *m0;
struct ip6_hdr *h = NULL; /* make the compiler happy */
struct pf_rule *a = NULL, *r = &pf_default_rule, *tr, *nr;
struct pf_state *s = NULL;
struct pf_ruleset *ruleset = NULL;
struct pf_pdesc pd;
int off, terminal = 0, dirndx;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_LOCK();
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (!pf_status.running ||
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
(m->m_flags & M_SKIP_FIREWALL)) {
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_UNLOCK();
Define semantic of M_SKIP_FIREWALL more precisely, i.e. also pass associated icmp_error() packets. While here retire PACKET_TAG_PF_GENERATED (which served the same purpose) and use M_SKIP_FIREWALL in pf as well. This should speed up things a bit as we get rid of the tag allocations. Discussed with: juli
2004-07-17 05:10:06 +00:00
#else
(m_tag_find(m, PACKET_TAG_PF_GENERATED, NULL) != NULL)) {
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (PF_PASS);
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
kif = pfi_index2kif[ifp->if_index];
if (kif == NULL) {
#ifdef __FreeBSD__
PF_UNLOCK();
#endif
return (PF_DROP);
}
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
M_ASSERTPKTHDR(m);
#else
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#ifdef DIAGNOSTIC
if ((m->m_flags & M_PKTHDR) == 0)
panic("non-M_PKTHDR is passed to pf_test");
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
#endif
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
memset(&pd, 0, sizeof(pd));
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (m->m_pkthdr.len < (int)sizeof(*h)) {
action = PF_DROP;
REASON_SET(&reason, PFRES_SHORT);
log = 1;
goto done;
}
/* We do IP header normalization and packet reassembly here */
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (pf_normalize_ip6(m0, dir, kif, &reason) != PF_PASS) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
action = PF_DROP;
goto done;
}
m = *m0;
h = mtod(m, struct ip6_hdr *);
pd.src = (struct pf_addr *)&h->ip6_src;
pd.dst = (struct pf_addr *)&h->ip6_dst;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PF_ACPY(&pd.baddr, dir == PF_OUT ? pd.src : pd.dst, AF_INET6);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
pd.ip_sum = NULL;
pd.af = AF_INET6;
pd.tos = 0;
pd.tot_len = ntohs(h->ip6_plen) + sizeof(struct ip6_hdr);
off = ((caddr_t)h - m->m_data) + sizeof(struct ip6_hdr);
pd.proto = h->ip6_nxt;
do {
switch (pd.proto) {
case IPPROTO_FRAGMENT:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_test_fragment(&r, dir, kif, m, h,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
&pd, &a, &ruleset);
if (action == PF_DROP)
REASON_SET(&reason, PFRES_FRAG);
goto done;
case IPPROTO_AH:
case IPPROTO_HOPOPTS:
case IPPROTO_ROUTING:
case IPPROTO_DSTOPTS: {
/* get next header and header length */
struct ip6_ext opt6;
if (!pf_pull_hdr(m, off, &opt6, sizeof(opt6),
NULL, NULL, pd.af)) {
DPFPRINTF(PF_DEBUG_MISC,
("pf: IPv6 short opt\n"));
action = PF_DROP;
REASON_SET(&reason, PFRES_SHORT);
log = 1;
goto done;
}
if (pd.proto == IPPROTO_AH)
off += (opt6.ip6e_len + 2) * 4;
else
off += (opt6.ip6e_len + 1) * 8;
pd.proto = opt6.ip6e_nxt;
/* goto the next header */
break;
}
default:
terminal++;
break;
}
} while (!terminal);
switch (pd.proto) {
case IPPROTO_TCP: {
struct tcphdr th;
pd.hdr.tcp = &th;
if (!pf_pull_hdr(m, off, &th, sizeof(th),
&action, &reason, AF_INET6)) {
log = action != PF_PASS;
goto done;
}
if (dir == PF_IN && pf_check_proto_cksum(m, off,
IPv6 packets can contain headers (like options) before the TCP/UDP/ICMP6 header. pf finds the first TCP/UDP/ICMP6 header to filter by traversing the header chain. In the case where headers are skipped, the protocol checksum verification used the wrong length (included the skipped headers), leading to incorrectly mismatching checksums. Such IPv6 packets with headers were silently dropped. Discovered by: Bernhard Schmidt MFC after: 1 week
2004-12-05 12:15:43 +00:00
ntohs(h->ip6_plen) - (off - sizeof(struct ip6_hdr)),
IPPROTO_TCP, AF_INET6)) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
action = PF_DROP;
goto done;
}
pd.p_len = pd.tot_len - off - (th.th_off << 2);
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_normalize_tcp(dir, kif, m, 0, off, h, &pd);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (action == PF_DROP)
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
goto done;
action = pf_test_state_tcp(&s, dir, kif, m, off, h, &pd,
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
&reason);
if (action == PF_PASS) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#if NPFSYNC
pfsync_update_state(s);
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = s->rule.ptr;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
a = s->anchor.ptr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
log = s->log;
} else if (s == NULL)
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
action = pf_test_tcp(&r, &s, dir, kif,
m, off, h, &pd, &a, &ruleset, inp);
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_test_tcp(&r, &s, dir, kif,
m, off, h, &pd, &a, &ruleset);
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
}
case IPPROTO_UDP: {
struct udphdr uh;
pd.hdr.udp = &uh;
if (!pf_pull_hdr(m, off, &uh, sizeof(uh),
&action, &reason, AF_INET6)) {
log = action != PF_PASS;
goto done;
}
if (dir == PF_IN && uh.uh_sum && pf_check_proto_cksum(m,
IPv6 packets can contain headers (like options) before the TCP/UDP/ICMP6 header. pf finds the first TCP/UDP/ICMP6 header to filter by traversing the header chain. In the case where headers are skipped, the protocol checksum verification used the wrong length (included the skipped headers), leading to incorrectly mismatching checksums. Such IPv6 packets with headers were silently dropped. Discovered by: Bernhard Schmidt MFC after: 1 week
2004-12-05 12:15:43 +00:00
off, ntohs(h->ip6_plen) - (off - sizeof(struct ip6_hdr)),
IPPROTO_UDP, AF_INET6)) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
action = PF_DROP;
goto done;
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (uh.uh_dport == 0 ||
ntohs(uh.uh_ulen) > m->m_pkthdr.len - off ||
ntohs(uh.uh_ulen) < sizeof(struct udphdr)) {
action = PF_DROP;
goto done;
}
action = pf_test_state_udp(&s, dir, kif, m, off, h, &pd);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (action == PF_PASS) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#if NPFSYNC
pfsync_update_state(s);
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = s->rule.ptr;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
a = s->anchor.ptr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
log = s->log;
} else if (s == NULL)
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#ifdef __FreeBSD__
action = pf_test_udp(&r, &s, dir, kif,
m, off, h, &pd, &a, &ruleset, inp);
#else
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_test_udp(&r, &s, dir, kif,
m, off, h, &pd, &a, &ruleset);
Add an additional struct inpcb * argument to pfil(9) in order to enable passing along socket information. This is required to work around a LOR with the socket code which results in an easy reproducible hard lockup with debug.mpsafenet=1. This commit does *not* fix the LOR, but enables us to do so later. The missing piece is to turn the filter locking into a leaf lock and will follow in a seperate (later) commit. This will hopefully be MT5'ed in order to fix the problem for RELENG_5 in forseeable future. Suggested by: rwatson A lot of work by: csjp (he'd be even more helpful w/o mentor-reviews ;) Reviewed by: rwatson, csjp Tested by: -pf, -ipfw, LINT, csjp and myself MFC after: 3 days LOR IDs: 14 - 17 (not fixed yet)
2004-09-29 04:54:33 +00:00
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
}
case IPPROTO_ICMPV6: {
struct icmp6_hdr ih;
pd.hdr.icmp6 = &ih;
if (!pf_pull_hdr(m, off, &ih, sizeof(ih),
&action, &reason, AF_INET6)) {
log = action != PF_PASS;
goto done;
}
if (dir == PF_IN && pf_check_proto_cksum(m, off,
IPv6 packets can contain headers (like options) before the TCP/UDP/ICMP6 header. pf finds the first TCP/UDP/ICMP6 header to filter by traversing the header chain. In the case where headers are skipped, the protocol checksum verification used the wrong length (included the skipped headers), leading to incorrectly mismatching checksums. Such IPv6 packets with headers were silently dropped. Discovered by: Bernhard Schmidt MFC after: 1 week
2004-12-05 12:15:43 +00:00
ntohs(h->ip6_plen) - (off - sizeof(struct ip6_hdr)),
IPPROTO_ICMPV6, AF_INET6)) {
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
action = PF_DROP;
goto done;
}
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_test_state_icmp(&s, dir, kif,
m, off, h, &pd);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (action == PF_PASS) {
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
#if NPFSYNC
pfsync_update_state(s);
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
r = s->rule.ptr;
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
a = s->anchor.ptr;
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
log = s->log;
} else if (s == NULL)
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_test_icmp(&r, &s, dir, kif,
m, off, h, &pd, &a, &ruleset);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
}
default:
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
action = pf_test_state_other(&s, dir, kif, &pd);
if (action == PF_PASS) {
r = s->rule.ptr;
a = s->anchor.ptr;
log = s->log;
} else if (s == NULL)
action = pf_test_other(&r, &s, dir, kif, m, off, h,
&pd, &a, &ruleset);
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
break;
}
done:
/* XXX handle IPv6 options, if not allowed. not implemented. */
#ifdef ALTQ
if (action == PF_PASS && r->qid) {
struct m_tag *mtag;
struct altq_tag *atag;
mtag = m_tag_get(PACKET_TAG_PF_QID, sizeof(*atag), M_NOWAIT);
if (mtag != NULL) {
atag = (struct altq_tag *)(mtag + 1);
if (pd.tos == IPTOS_LOWDELAY)
atag->qid = r->pqid;
else
atag->qid = r->qid;
/* add hints for ecn */
atag->af = AF_INET6;
atag->hdr = h;
m_tag_prepend(m, mtag);
}
}
#endif
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
if (dir == PF_IN && action == PF_PASS && (pd.proto == IPPROTO_TCP ||
pd.proto == IPPROTO_UDP) && s != NULL && s->nat_rule.ptr != NULL &&
(s->nat_rule.ptr->action == PF_RDR ||
s->nat_rule.ptr->action == PF_BINAT) &&
IN6_IS_ADDR_LOOPBACK(&pd.dst->v6) &&
pf_add_mbuf_tag(m, PACKET_TAG_PF_TRANSLATE_LOCALHOST)) {
action = PF_DROP;
REASON_SET(&reason, PFRES_MEMORY);
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (log)
Commit pf version 3.5 and link additional files to the kernel build. Version 3.5 brings: - Atomic commits of ruleset changes (reduce the chance of ending up in an inconsistent state). - A 30% reduction in the size of state table entries. - Source-tracking (limit number of clients and states per client). - Sticky-address (the flexibility of round-robin with the benefits of source-hash). - Significant improvements to interface handling. - and many more ...
2004-06-16 23:24:02 +00:00
PFLOG_PACKET(kif, h, m, AF_INET6, dir, reason, r, a, ruleset);
kif->pfik_bytes[1][dir == PF_OUT][action != PF_PASS] += pd.tot_len;
kif->pfik_packets[1][dir == PF_OUT][action != PF_PASS]++;
if (action == PF_PASS || r->action == PF_DROP) {
r->packets++;
r->bytes += pd.tot_len;
if (a != NULL) {
a->packets++;
a->bytes += pd.tot_len;
}
if (s != NULL) {
dirndx = (dir == s->direction) ? 0 : 1;
s->packets[dirndx]++;
s->bytes[dirndx] += pd.tot_len;
if (s->nat_rule.ptr != NULL) {
s->nat_rule.ptr->packets++;
s->nat_rule.ptr->bytes += pd.tot_len;
}
if (s->src_node != NULL) {
s->src_node->packets++;
s->src_node->bytes += pd.tot_len;
}
if (s->nat_src_node != NULL) {
s->nat_src_node->packets++;
s->nat_src_node->bytes += pd.tot_len;
}
}
tr = r;
nr = (s != NULL) ? s->nat_rule.ptr : pd.nat_rule;
if (nr != NULL) {
struct pf_addr *x;
/*
* XXX: we need to make sure that the addresses
* passed to pfr_update_stats() are the same than
* the addresses used during matching (pfr_match)
*/
if (r == &pf_default_rule) {
tr = nr;
x = (s == NULL || s->direction == dir) ?
&pd.baddr : &pd.naddr;
} else {
x = (s == NULL || s->direction == dir) ?
&pd.naddr : &pd.baddr;
}
if (x == &pd.baddr || s == NULL) {
if (dir == PF_OUT)
pd.src = x;
else
pd.dst = x;
}
}
if (tr->src.addr.type == PF_ADDR_TABLE)
pfr_update_stats(tr->src.addr.p.tbl, (s == NULL ||
s->direction == dir) ? pd.src : pd.dst, pd.af,
pd.tot_len, dir == PF_OUT, r->action == PF_PASS,
tr->src.not);
if (tr->dst.addr.type == PF_ADDR_TABLE)
pfr_update_stats(tr->dst.addr.p.tbl, (s == NULL ||
s->direction == dir) ? pd.dst : pd.src, pd.af,
pd.tot_len, dir == PF_OUT, r->action == PF_PASS,
tr->dst.not);
}
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
if (action == PF_SYNPROXY_DROP) {
m_freem(*m0);
*m0 = NULL;
action = PF_PASS;
} else if (r->rt)
/* pf_route6 can free the mbuf causing *m0 to become NULL */
pf_route6(m0, r, dir, ifp, s);
Style(9) round for the pf kernel parts. Mostly #if defined() -> #ifdef Also set HOOK_HACK to true (remove the related #ifdef's) as we have the hooks in the kernel this was missed during the merge from the port. Noticed by: Amir S. (for the HOOK_HACK part) Approved by: bms(mentor)
2004-03-17 21:11:02 +00:00
#ifdef __FreeBSD__
Bring diff from the security/pf port. This has code been tested as a port for a long time and is run in production use. This is the code present in portversion 2.03 with some additional tweaks. The rather extensive diff accounts for: - locking (to enable pf to work with a giant-free netstack) - byte order difference between OpenBSD and FreeBSD for ip_len/ip_off - conversion from pool(9) to zone(9) - api differences etc. Approved by: bms(mentor) (in general)
2004-02-26 02:34:12 +00:00
PF_UNLOCK();
#endif
Vendor import of OpenBSD's packet filter (pf) as of OpenBSD 3.4 Approved by: bms(mentor), core (in general)
2004-02-26 02:04:28 +00:00
return (action);
}
#endif /* INET6 */
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