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c693a045de
For TCP, verify that the sequence number in the ICMP packet falls within the tcp receive window before performing any actions indicated by the icmp packet. Clean up some layering violations (access to tcp internals from in_pcb)
303 lines
11 KiB
C
303 lines
11 KiB
C
/*
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)in_pcb.h 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#ifndef _NETINET_IN_PCB_H_
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#define _NETINET_IN_PCB_H_
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#include <sys/queue.h>
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#include <netinet6/ipsec.h> /* for IPSEC */
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#define in6pcb inpcb /* for KAME src sync over BSD*'s */
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#define in6p_sp inp_sp /* for KAME src sync over BSD*'s */
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/*
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* Common structure pcb for internet protocol implementation.
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* Here are stored pointers to local and foreign host table
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* entries, local and foreign socket numbers, and pointers
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* up (to a socket structure) and down (to a protocol-specific)
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* control block.
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*/
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LIST_HEAD(inpcbhead, inpcb);
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LIST_HEAD(inpcbporthead, inpcbport);
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typedef u_quad_t inp_gen_t;
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/*
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* PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet.
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* So, AF_INET6 null laddr is also used as AF_INET null laddr,
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* by utilize following structure. (At last, same as INRIA)
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*/
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struct in_addr_4in6 {
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u_int32_t ia46_pad32[3];
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struct in_addr ia46_addr4;
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};
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/*
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* NB: the zone allocator is type-stable EXCEPT FOR THE FIRST TWO LONGS
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* of the structure. Therefore, it is important that the members in
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* that position not contain any information which is required to be
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* stable.
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*/
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struct icmp6_filter;
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struct inpcb {
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LIST_ENTRY(inpcb) inp_hash; /* hash list */
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u_short inp_fport; /* foreign port */
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u_short inp_lport; /* local port */
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LIST_ENTRY(inpcb) inp_list; /* list for all PCBs of this proto */
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u_int32_t inp_flow;
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/* protocol dependent part, local and foreign addr */
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union {
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/* foreign host table entry */
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struct in_addr_4in6 inp46_foreign;
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struct in6_addr inp6_foreign;
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} inp_dependfaddr;
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union {
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/* local host table entry */
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struct in_addr_4in6 inp46_local;
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struct in6_addr inp6_local;
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} inp_dependladdr;
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caddr_t inp_ppcb; /* pointer to per-protocol pcb */
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struct inpcbinfo *inp_pcbinfo; /* PCB list info */
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struct socket *inp_socket; /* back pointer to socket */
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/* list for this PCB's local port */
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int inp_flags; /* generic IP/datagram flags */
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/* protocol dependent part; cached route */
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union {
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/* placeholder for routing entry */
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struct route inp4_route;
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struct route_in6 inp6_route;
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} inp_dependroute;
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struct inpcbpolicy *inp_sp; /* for IPSEC */
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u_char inp_vflag;
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#define INP_IPV4 0x1
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#define INP_IPV6 0x2
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u_char inp_ip_ttl; /* time to live proto */
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u_char inp_ip_p; /* protocol proto */
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/* protocol dependent part; options */
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struct {
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u_char inp4_ip_tos; /* type of service proto */
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struct mbuf *inp4_options; /* IP options */
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struct ip_moptions *inp4_moptions; /* IP multicast options */
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} inp_depend4;
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#define inp_faddr inp_dependfaddr.inp46_foreign.ia46_addr4
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#define inp_laddr inp_dependladdr.inp46_local.ia46_addr4
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#define inp_route inp_dependroute.inp4_route
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#define inp_ip_tos inp_depend4.inp4_ip_tos
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#define inp_options inp_depend4.inp4_options
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#define inp_moptions inp_depend4.inp4_moptions
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struct {
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/* IP options */
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struct mbuf *inp6_options;
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/* IP6 options for outgoing packets */
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struct ip6_pktopts *inp6_outputopts;
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/* IP multicast options */
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struct ip6_moptions *inp6_moptions;
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/* ICMPv6 code type filter */
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struct icmp6_filter *inp6_icmp6filt;
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/* IPV6_CHECKSUM setsockopt */
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int inp6_cksum;
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u_short inp6_ifindex;
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short inp6_hops;
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u_int8_t inp6_hlim;
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} inp_depend6;
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LIST_ENTRY(inpcb) inp_portlist;
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struct inpcbport *inp_phd; /* head of this list */
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inp_gen_t inp_gencnt; /* generation count of this instance */
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#define in6p_faddr inp_dependfaddr.inp6_foreign
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#define in6p_laddr inp_dependladdr.inp6_local
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#define in6p_route inp_dependroute.inp6_route
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#define in6p_ip6_hlim inp_depend6.inp6_hlim
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#define in6p_hops inp_depend6.inp6_hops /* default hop limit */
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#define in6p_ip6_nxt inp_ip_p
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#define in6p_flowinfo inp_flow
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#define in6p_vflag inp_vflag
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#define in6p_options inp_depend6.inp6_options
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#define in6p_outputopts inp_depend6.inp6_outputopts
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#define in6p_moptions inp_depend6.inp6_moptions
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#define in6p_icmp6filt inp_depend6.inp6_icmp6filt
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#define in6p_cksum inp_depend6.inp6_cksum
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#define inp6_ifindex inp_depend6.inp6_ifindex
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#define in6p_flags inp_flags /* for KAME src sync over BSD*'s */
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#define in6p_socket inp_socket /* for KAME src sync over BSD*'s */
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#define in6p_lport inp_lport /* for KAME src sync over BSD*'s */
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#define in6p_fport inp_fport /* for KAME src sync over BSD*'s */
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#define in6p_ppcb inp_ppcb /* for KAME src sync over BSD*'s */
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};
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/*
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* The range of the generation count, as used in this implementation,
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* is 9e19. We would have to create 300 billion connections per
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* second for this number to roll over in a year. This seems sufficiently
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* unlikely that we simply don't concern ourselves with that possibility.
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*/
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/*
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* Interface exported to userland by various protocols which use
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* inpcbs. Hack alert -- only define if struct xsocket is in scope.
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*/
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#ifdef _SYS_SOCKETVAR_H_
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struct xinpcb {
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size_t xi_len; /* length of this structure */
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struct inpcb xi_inp;
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struct xsocket xi_socket;
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u_quad_t xi_alignment_hack;
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};
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struct xinpgen {
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size_t xig_len; /* length of this structure */
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u_int xig_count; /* number of PCBs at this time */
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inp_gen_t xig_gen; /* generation count at this time */
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so_gen_t xig_sogen; /* socket generation count at this time */
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};
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#endif /* _SYS_SOCKETVAR_H_ */
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struct inpcbport {
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LIST_ENTRY(inpcbport) phd_hash;
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struct inpcbhead phd_pcblist;
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u_short phd_port;
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};
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struct inpcbinfo { /* XXX documentation, prefixes */
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struct inpcbhead *hashbase;
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u_long hashmask;
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struct inpcbporthead *porthashbase;
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u_long porthashmask;
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struct inpcbhead *listhead;
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u_short lastport;
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u_short lastlow;
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u_short lasthi;
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struct vm_zone *ipi_zone; /* zone to allocate pcbs from */
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u_int ipi_count; /* number of pcbs in this list */
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u_quad_t ipi_gencnt; /* current generation count */
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};
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#define INP_PCBHASH(faddr, lport, fport, mask) \
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(((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask))
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#define INP_PCBPORTHASH(lport, mask) \
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(ntohs((lport)) & (mask))
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/* flags in inp_flags: */
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#define INP_RECVOPTS 0x01 /* receive incoming IP options */
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#define INP_RECVRETOPTS 0x02 /* receive IP options for reply */
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#define INP_RECVDSTADDR 0x04 /* receive IP dst address */
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#define INP_HDRINCL 0x08 /* user supplies entire IP header */
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#define INP_HIGHPORT 0x10 /* user wants "high" port binding */
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#define INP_LOWPORT 0x20 /* user wants "low" port binding */
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#define INP_ANONPORT 0x40 /* port chosen for user */
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#define INP_RECVIF 0x80 /* receive incoming interface */
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#define INP_MTUDISC 0x100 /* user can do MTU discovery */
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#define INP_FAITH 0x200 /* accept FAITH'ed connections */
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#define IN6P_PKTINFO 0x010000
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#define IN6P_HOPLIMIT 0x020000
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#define IN6P_NEXTHOP 0x040000
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#define IN6P_HOPOPTS 0x080000
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#define IN6P_DSTOPTS 0x100000
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#define IN6P_RTHDR 0x200000
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#define IN6P_BINDV6ONLY 0x400000
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#define INP_CONTROLOPTS (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
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INP_RECVIF|\
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IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_NEXTHOP|\
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IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR)
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#define INP_UNMAPPABLEOPTS (IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR)
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/* for KAME src sync over BSD*'s */
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#define IN6P_RECVOPTS INP_RECVOPTS
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#define IN6P_RECVRETOPTS INP_RECVRETOPTS
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#define IN6P_RECVDSTADDR INP_RECVDSTADDR
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#define IN6P_HDRINCL INP_HDRINCL
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#define IN6P_HIGHPORT INP_HIGHPORT
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#define IN6P_LOWPORT INP_LOWPORT
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#define IN6P_ANONPORT INP_ANONPORT
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#define IN6P_RECVIF INP_RECVIF
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#define IN6P_MTUDISC INP_MTUDISC
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#define IN6P_FAITH INP_FAITH
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#define IN6P_CONTROLOPTS INP_CONTROLOPTS
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/*
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* socket AF version is {newer than,or include}
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* actual datagram AF version
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*/
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#define INPLOOKUP_WILDCARD 1
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#define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb)
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#define sotoin6pcb(so) sotoinpcb(so) /* for KAME src sync over BSD*'s */
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#define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family
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#define INP_CHECK_SOCKAF(so, af) (INP_SOCKAF(so) == af)
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#ifdef _KERNEL
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extern int ipport_lowfirstauto;
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extern int ipport_lowlastauto;
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extern int ipport_firstauto;
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extern int ipport_lastauto;
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extern int ipport_hifirstauto;
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extern int ipport_hilastauto;
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void in_losing __P((struct inpcb *));
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void in_rtchange __P((struct inpcb *, int));
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int in_pcballoc __P((struct socket *, struct inpcbinfo *, struct proc *));
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int in_pcbbind __P((struct inpcb *, struct sockaddr *, struct proc *));
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int in_pcbconnect __P((struct inpcb *, struct sockaddr *, struct proc *));
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void in_pcbdetach __P((struct inpcb *));
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void in_pcbdisconnect __P((struct inpcb *));
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int in_pcbinshash __P((struct inpcb *));
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int in_pcbladdr __P((struct inpcb *, struct sockaddr *,
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struct sockaddr_in **));
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struct inpcb *
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in_pcblookup_local __P((struct inpcbinfo *,
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struct in_addr, u_int, int));
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struct inpcb *
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in_pcblookup_hash __P((struct inpcbinfo *,
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struct in_addr, u_int, struct in_addr, u_int,
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int, struct ifnet *));
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void in_pcbnotifyall __P((struct inpcbhead *, struct in_addr,
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int, void (*)(struct inpcb *, int)));
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void in_pcbrehash __P((struct inpcb *));
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int in_setpeeraddr __P((struct socket *so, struct sockaddr **nam));
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int in_setsockaddr __P((struct socket *so, struct sockaddr **nam));
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void in_pcbremlists __P((struct inpcb *inp));
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int prison_xinpcb __P((struct proc *p, struct inpcb *inp));
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#endif /* _KERNEL */
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#endif /* !_NETINET_IN_PCB_H_ */
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