mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-04 09:09:56 +00:00
2076 lines
47 KiB
C
2076 lines
47 KiB
C
/*
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* Copyright (C) 1993-2000 by Darren Reed.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that this notice is preserved and due credit is given
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* to the original author and the contributors.
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*/
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#if !defined(lint)
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static const char sccsid[] = "@(#)fil.c 1.36 6/5/96 (C) 1993-1996 Darren Reed";
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/* static const char rcsid[] = "@(#)$Id: fil.c,v 2.3.2.16 2000/01/27 08:49:37 darrenr Exp $"; */
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static const char rcsid[] = "@(#)$FreeBSD$";
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#endif
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#include <sys/errno.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/file.h>
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#if defined(__NetBSD__) && (NetBSD >= 199905) && !defined(IPFILTER_LKM) && \
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defined(_KERNEL)
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# include "opt_ipfilter_log.h"
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#endif
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#if (defined(KERNEL) || defined(_KERNEL)) && defined(__FreeBSD_version) && \
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(__FreeBSD_version >= 220000)
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# if (__FreeBSD_version >= 400000)
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# ifndef KLD_MODULE
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# include "opt_inet6.h"
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# endif
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# if (__FreeBSD_version == 400019)
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# define CSUM_DELAY_DATA
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# endif
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# endif
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# include <sys/filio.h>
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# include <sys/fcntl.h>
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#else
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# include <sys/ioctl.h>
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#endif
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#if (defined(_KERNEL) || defined(KERNEL)) && !defined(linux)
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# include <sys/systm.h>
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#else
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# include <stdio.h>
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# include <string.h>
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# include <stdlib.h>
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#endif
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#include <sys/uio.h>
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#if !defined(__SVR4) && !defined(__svr4__)
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# ifndef linux
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# include <sys/mbuf.h>
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# endif
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#else
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# include <sys/byteorder.h>
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# if SOLARIS2 < 5
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# include <sys/dditypes.h>
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# endif
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# include <sys/stream.h>
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#endif
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#ifndef linux
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# include <sys/protosw.h>
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# include <sys/socket.h>
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#endif
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#include <net/if.h>
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#ifdef sun
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# include <net/af.h>
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#endif
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#ifndef linux
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# include <netinet/ip_var.h>
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#endif
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#if defined(__sgi) && defined(IFF_DRVRLOCK) /* IRIX 6 */
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# include <sys/hashing.h>
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# include <netinet/in_var.h>
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#endif
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#include <netinet/tcp.h>
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#include <netinet/udp.h>
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#include <netinet/ip_icmp.h>
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#include "netinet/ip_compat.h"
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#ifdef USE_INET6
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# include <netinet/icmp6.h>
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# if !SOLARIS && defined(_KERNEL)
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# include <netinet6/in6_var.h>
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# endif
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#endif
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#include <netinet/tcpip.h>
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#include "netinet/ip_fil.h"
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#include "netinet/ip_proxy.h"
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#include "netinet/ip_nat.h"
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#include "netinet/ip_frag.h"
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#include "netinet/ip_state.h"
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#include "netinet/ip_auth.h"
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# if defined(__FreeBSD_version) && (__FreeBSD_version >= 300000)
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# include <sys/malloc.h>
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# if defined(_KERNEL) && !defined(IPFILTER_LKM)
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# include "opt_ipfilter.h"
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# endif
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# endif
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#ifndef MIN
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# define MIN(a,b) (((a)<(b))?(a):(b))
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#endif
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#include "netinet/ipl.h"
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#include <machine/in_cksum.h>
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#ifndef _KERNEL
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# include "ipf.h"
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# include "ipt.h"
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extern int opts;
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# define FR_VERBOSE(verb_pr) verbose verb_pr
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# define FR_DEBUG(verb_pr) debug verb_pr
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# define IPLLOG(a, c, d, e) ipllog()
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#else /* #ifndef _KERNEL */
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# define FR_VERBOSE(verb_pr)
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# define FR_DEBUG(verb_pr)
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# define IPLLOG(a, c, d, e) ipflog(a, c, d, e)
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# if SOLARIS || defined(__sgi)
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extern KRWLOCK_T ipf_mutex, ipf_auth, ipf_nat;
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extern kmutex_t ipf_rw;
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# endif
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# if SOLARIS
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# define FR_NEWAUTH(m, fi, ip, qif) fr_newauth((mb_t *)m, fi, \
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ip, qif)
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# else /* SOLARIS */
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# define FR_NEWAUTH(m, fi, ip, qif) fr_newauth((mb_t *)m, fi, ip)
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# endif /* SOLARIS || __sgi */
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#endif /* _KERNEL */
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struct filterstats frstats[2] = {{0,0,0,0,0},{0,0,0,0,0}};
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struct frentry *ipfilter[2][2] = { { NULL, NULL }, { NULL, NULL } },
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#ifdef USE_INET6
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*ipfilter6[2][2] = { { NULL, NULL }, { NULL, NULL } },
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*ipacct6[2][2] = { { NULL, NULL }, { NULL, NULL } },
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#endif
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*ipacct[2][2] = { { NULL, NULL }, { NULL, NULL } };
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struct frgroup *ipfgroups[3][2];
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int fr_flags = IPF_LOGGING;
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int fr_active = 0;
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int fr_chksrc = 0;
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#if defined(IPFILTER_DEFAULT_BLOCK)
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int fr_pass = FR_NOMATCH|FR_BLOCK;
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#else
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int fr_pass = (IPF_DEFAULT_PASS|FR_NOMATCH);
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#endif
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char ipfilter_version[] = IPL_VERSION;
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fr_info_t frcache[2];
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static int frflushlist __P((int, minor_t, int *, frentry_t **));
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#ifdef _KERNEL
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static void frsynclist __P((frentry_t *));
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#endif
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/*
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* bit values for identifying presence of individual IP options
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*/
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struct optlist ipopts[20] = {
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{ IPOPT_NOP, 0x000001 },
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{ IPOPT_RR, 0x000002 },
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{ IPOPT_ZSU, 0x000004 },
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{ IPOPT_MTUP, 0x000008 },
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{ IPOPT_MTUR, 0x000010 },
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{ IPOPT_ENCODE, 0x000020 },
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{ IPOPT_TS, 0x000040 },
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{ IPOPT_TR, 0x000080 },
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{ IPOPT_SECURITY, 0x000100 },
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{ IPOPT_LSRR, 0x000200 },
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{ IPOPT_E_SEC, 0x000400 },
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{ IPOPT_CIPSO, 0x000800 },
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{ IPOPT_SATID, 0x001000 },
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{ IPOPT_SSRR, 0x002000 },
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{ IPOPT_ADDEXT, 0x004000 },
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{ IPOPT_VISA, 0x008000 },
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{ IPOPT_IMITD, 0x010000 },
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{ IPOPT_EIP, 0x020000 },
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{ IPOPT_FINN, 0x040000 },
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{ 0, 0x000000 }
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};
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/*
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* bit values for identifying presence of individual IP security options
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*/
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struct optlist secopt[8] = {
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{ IPSO_CLASS_RES4, 0x01 },
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{ IPSO_CLASS_TOPS, 0x02 },
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{ IPSO_CLASS_SECR, 0x04 },
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{ IPSO_CLASS_RES3, 0x08 },
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{ IPSO_CLASS_CONF, 0x10 },
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{ IPSO_CLASS_UNCL, 0x20 },
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{ IPSO_CLASS_RES2, 0x40 },
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{ IPSO_CLASS_RES1, 0x80 }
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};
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/*
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* compact the IP header into a structure which contains just the info.
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* which is useful for comparing IP headers with.
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*/
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void fr_makefrip(hlen, ip, fin)
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int hlen;
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ip_t *ip;
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fr_info_t *fin;
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{
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u_short optmsk = 0, secmsk = 0, auth = 0;
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int i, mv, ol, off, p, plen, v;
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fr_ip_t *fi = &fin->fin_fi;
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struct optlist *op;
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u_char *s, opt;
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tcphdr_t *tcp;
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fin->fin_rev = 0;
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fin->fin_fr = NULL;
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fin->fin_tcpf = 0;
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fin->fin_data[0] = 0;
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fin->fin_data[1] = 0;
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fin->fin_rule = -1;
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fin->fin_group = -1;
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#ifdef _KERNEL
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fin->fin_icode = ipl_unreach;
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#endif
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v = fin->fin_v;
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fi->fi_v = v;
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fin->fin_hlen = hlen;
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if (v == 4) {
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fin->fin_id = ip->ip_id;
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fi->fi_tos = ip->ip_tos;
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off = (ip->ip_off & IP_OFFMASK) << 3;
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tcp = (tcphdr_t *)((char *)ip + hlen);
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(*(((u_short *)fi) + 1)) = (*(((u_short *)ip) + 4));
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fi->fi_src.i6[1] = 0;
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fi->fi_src.i6[2] = 0;
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fi->fi_src.i6[3] = 0;
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fi->fi_dst.i6[1] = 0;
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fi->fi_dst.i6[2] = 0;
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fi->fi_dst.i6[3] = 0;
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fi->fi_saddr = ip->ip_src.s_addr;
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fi->fi_daddr = ip->ip_dst.s_addr;
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p = ip->ip_p;
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fi->fi_fl = (hlen > sizeof(ip_t)) ? FI_OPTIONS : 0;
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if (ip->ip_off & 0x3fff)
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fi->fi_fl |= FI_FRAG;
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plen = ip->ip_len;
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fin->fin_dlen = plen - hlen;
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}
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#ifdef USE_INET6
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else if (v == 6) {
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ip6_t *ip6 = (ip6_t *)ip;
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off = 0;
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p = ip6->ip6_nxt;
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fi->fi_p = p;
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fi->fi_ttl = ip6->ip6_hlim;
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tcp = (tcphdr_t *)(ip6 + 1);
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fi->fi_src.in6 = ip6->ip6_src;
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fi->fi_dst.in6 = ip6->ip6_dst;
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fin->fin_id = (u_short)(ip6->ip6_flow & 0xffff);
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fi->fi_tos = 0;
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fi->fi_fl = 0;
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plen = ntohs(ip6->ip6_plen);
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fin->fin_dlen = plen;
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}
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#endif
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else
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return;
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fin->fin_off = off;
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fin->fin_plen = plen;
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fin->fin_dp = (void *)tcp;
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switch (p)
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{
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case IPPROTO_ICMP :
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{
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int minicmpsz = sizeof(struct icmp);
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icmphdr_t *icmp;
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if (!off && (fin->fin_dlen > 1)) {
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fin->fin_data[0] = *(u_short *)tcp;
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icmp = (icmphdr_t *)tcp;
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if (icmp->icmp_type == ICMP_ECHOREPLY ||
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icmp->icmp_type == ICMP_ECHO)
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minicmpsz = ICMP_MINLEN;
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/*
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* type(1) + code(1) + cksum(2) + id(2) seq(2) +
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* 3*timestamp(3*4)
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*/
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else if (icmp->icmp_type == ICMP_TSTAMP ||
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icmp->icmp_type == ICMP_TSTAMPREPLY)
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minicmpsz = 20;
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/*
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* type(1) + code(1) + cksum(2) + id(2) seq(2) +
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* mask(4)
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*/
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else if (icmp->icmp_type == ICMP_MASKREQ ||
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icmp->icmp_type == ICMP_MASKREPLY)
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minicmpsz = 12;
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}
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if ((!(plen >= hlen + minicmpsz) && !off) ||
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(off && off < sizeof(struct icmp)))
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fi->fi_fl |= FI_SHORT;
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break;
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}
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case IPPROTO_TCP :
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fi->fi_fl |= FI_TCPUDP;
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#ifdef USE_INET6
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if (v == 6) {
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if (plen < sizeof(struct tcphdr))
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fi->fi_fl |= FI_SHORT;
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} else
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#endif
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if (v == 4) {
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if ((!IPMINLEN(ip, tcphdr) && !off) ||
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(off && off < sizeof(struct tcphdr)))
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fi->fi_fl |= FI_SHORT;
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}
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if (!(fi->fi_fl & FI_SHORT) && !off)
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fin->fin_tcpf = tcp->th_flags;
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goto getports;
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case IPPROTO_UDP :
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fi->fi_fl |= FI_TCPUDP;
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#ifdef USE_INET6
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if (v == 6) {
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if (plen < sizeof(struct udphdr))
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fi->fi_fl |= FI_SHORT;
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} else
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#endif
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if (v == 4) {
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if ((!IPMINLEN(ip, udphdr) && !off) ||
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(off && off < sizeof(struct udphdr)))
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fi->fi_fl |= FI_SHORT;
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}
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getports:
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if (!off && (fin->fin_dlen > 3)) {
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fin->fin_data[0] = ntohs(tcp->th_sport);
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fin->fin_data[1] = ntohs(tcp->th_dport);
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}
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break;
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default :
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break;
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}
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#ifdef USE_INET6
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if (v == 6) {
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fi->fi_optmsk = 0;
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fi->fi_secmsk = 0;
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fi->fi_auth = 0;
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return;
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}
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#endif
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for (s = (u_char *)(ip + 1), hlen -= (int)sizeof(*ip); hlen > 0; ) {
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opt = *s;
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if (opt == '\0')
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break;
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else if (opt == IPOPT_NOP)
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ol = 1;
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else {
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if (hlen < 2)
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break;
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ol = (int)*(s + 1);
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if (ol < 2 || ol > hlen)
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break;
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}
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for (i = 9, mv = 4; mv >= 0; ) {
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op = ipopts + i;
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if (opt == (u_char)op->ol_val) {
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optmsk |= op->ol_bit;
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if (opt == IPOPT_SECURITY) {
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struct optlist *sp;
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u_char sec;
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int j, m;
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sec = *(s + 2); /* classification */
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for (j = 3, m = 2; m >= 0; ) {
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sp = secopt + j;
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if (sec == sp->ol_val) {
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secmsk |= sp->ol_bit;
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auth = *(s + 3);
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auth *= 256;
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auth += *(s + 4);
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break;
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}
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if (sec < sp->ol_val)
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j -= m--;
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else
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j += m--;
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}
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}
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break;
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}
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if (opt < op->ol_val)
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i -= mv--;
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else
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i += mv--;
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}
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hlen -= ol;
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s += ol;
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}
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if (auth && !(auth & 0x0100))
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auth &= 0xff00;
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fi->fi_optmsk = optmsk;
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fi->fi_secmsk = secmsk;
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fi->fi_auth = auth;
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}
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|
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/*
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* check an IP packet for TCP/UDP characteristics such as ports and flags.
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*/
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int fr_tcpudpchk(ft, fin)
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frtuc_t *ft;
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fr_info_t *fin;
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{
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register u_short po, tup;
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register char i;
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register int err = 1;
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/*
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* Both ports should *always* be in the first fragment.
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* So far, I cannot find any cases where they can not be.
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*
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* compare destination ports
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*/
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if ((i = (int)ft->ftu_dcmp)) {
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po = ft->ftu_dport;
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tup = fin->fin_data[1];
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/*
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* Do opposite test to that required and
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* continue if that succeeds.
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*/
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if (!--i && tup != po) /* EQUAL */
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err = 0;
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else if (!--i && tup == po) /* NOTEQUAL */
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err = 0;
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else if (!--i && tup >= po) /* LESSTHAN */
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err = 0;
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else if (!--i && tup <= po) /* GREATERTHAN */
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err = 0;
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else if (!--i && tup > po) /* LT or EQ */
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err = 0;
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else if (!--i && tup < po) /* GT or EQ */
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err = 0;
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else if (!--i && /* Out of range */
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(tup >= po && tup <= ft->ftu_dtop))
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err = 0;
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else if (!--i && /* In range */
|
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(tup <= po || tup >= ft->ftu_dtop))
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err = 0;
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}
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/*
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* compare source ports
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*/
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if (err && (i = (int)ft->ftu_scmp)) {
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po = ft->ftu_sport;
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tup = fin->fin_data[0];
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if (!--i && tup != po)
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err = 0;
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else if (!--i && tup == po)
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err = 0;
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else if (!--i && tup >= po)
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err = 0;
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else if (!--i && tup <= po)
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err = 0;
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else if (!--i && tup > po)
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err = 0;
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else if (!--i && tup < po)
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err = 0;
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else if (!--i && /* Out of range */
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(tup >= po && tup <= ft->ftu_stop))
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err = 0;
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else if (!--i && /* In range */
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(tup <= po || tup >= ft->ftu_stop))
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err = 0;
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}
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|
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/*
|
|
* If we don't have all the TCP/UDP header, then how can we
|
|
* expect to do any sort of match on it ? If we were looking for
|
|
* TCP flags, then NO match. If not, then match (which should
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|
* satisfy the "short" class too).
|
|
*/
|
|
if (err && (fin->fin_fi.fi_p == IPPROTO_TCP)) {
|
|
if (fin->fin_fi.fi_fl & FI_SHORT)
|
|
return !(ft->ftu_tcpf | ft->ftu_tcpfm);
|
|
/*
|
|
* Match the flags ? If not, abort this match.
|
|
*/
|
|
if (ft->ftu_tcpfm &&
|
|
ft->ftu_tcpf != (fin->fin_tcpf & ft->ftu_tcpfm)) {
|
|
FR_DEBUG(("f. %#x & %#x != %#x\n", fin->fin_tcpf,
|
|
ft->ftu_tcpfm, ft->ftu_tcpf));
|
|
err = 0;
|
|
}
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Check the input/output list of rules for a match and result.
|
|
* Could be per interface, but this gets real nasty when you don't have
|
|
* kernel sauce.
|
|
*/
|
|
int fr_scanlist(pass, ip, fin, m)
|
|
u_32_t pass;
|
|
ip_t *ip;
|
|
register fr_info_t *fin;
|
|
void *m;
|
|
{
|
|
register struct frentry *fr;
|
|
register fr_ip_t *fi = &fin->fin_fi;
|
|
int rulen, portcmp = 0, off, skip = 0, logged = 0;
|
|
u_32_t passt;
|
|
|
|
fr = fin->fin_fr;
|
|
fin->fin_fr = NULL;
|
|
fin->fin_rule = 0;
|
|
fin->fin_group = 0;
|
|
if (fin->fin_v == 4)
|
|
off = ip->ip_off & IP_OFFMASK;
|
|
else
|
|
off = 0;
|
|
pass |= (fi->fi_fl << 24);
|
|
|
|
if ((fi->fi_fl & FI_TCPUDP) && (fin->fin_dlen > 3) && !off)
|
|
portcmp = 1;
|
|
|
|
for (rulen = 0; fr; fr = fr->fr_next, rulen++) {
|
|
if (skip) {
|
|
skip--;
|
|
continue;
|
|
}
|
|
/*
|
|
* In all checks below, a null (zero) value in the
|
|
* filter struture is taken to mean a wildcard.
|
|
*
|
|
* check that we are working for the right interface
|
|
*/
|
|
#ifdef _KERNEL
|
|
# if BSD >= 199306
|
|
if (fin->fin_out != 0) {
|
|
if ((fr->fr_oifa &&
|
|
fr->fr_oifa != ((mb_t *)m)->m_pkthdr.rcvif) ||
|
|
(fr->fr_ifa && fr->fr_ifa != fin->fin_ifp))
|
|
continue;
|
|
} else
|
|
# endif
|
|
if (fr->fr_ifa && fr->fr_ifa != fin->fin_ifp)
|
|
continue;
|
|
#else
|
|
if (opts & (OPT_VERBOSE|OPT_DEBUG))
|
|
printf("\n");
|
|
FR_VERBOSE(("%c", (pass & FR_PASS) ? 'p' :
|
|
(pass & FR_AUTH) ? 'a' : 'b'));
|
|
if (fr->fr_ifa && fr->fr_ifa != fin->fin_ifp)
|
|
continue;
|
|
FR_VERBOSE((":i"));
|
|
#endif
|
|
{
|
|
register u_32_t *ld, *lm, *lip;
|
|
register int i;
|
|
|
|
lip = (u_32_t *)fi;
|
|
lm = (u_32_t *)&fr->fr_mip;
|
|
ld = (u_32_t *)&fr->fr_ip;
|
|
i = ((*lip & *lm) != *ld);
|
|
FR_DEBUG(("0. %#08x & %#08x != %#08x\n",
|
|
*lip, *lm, *ld));
|
|
if (i)
|
|
continue;
|
|
/*
|
|
* We now know whether the packet version and the
|
|
* rule version match, along with protocol, ttl and
|
|
* tos.
|
|
*/
|
|
lip++, lm++, ld++;
|
|
/*
|
|
* Unrolled loops (4 each, for 32 bits).
|
|
*/
|
|
i |= ((*lip & *lm) != *ld) << 19;
|
|
FR_DEBUG(("1a. %#08x & %#08x != %#08x\n",
|
|
*lip, *lm, *ld));
|
|
if (fi->fi_v == 6) {
|
|
lip++, lm++, ld++;
|
|
i |= ((*lip & *lm) != *ld) << 19;
|
|
FR_DEBUG(("1b. %#08x & %#08x != %#08x\n",
|
|
*lip, *lm, *ld));
|
|
lip++, lm++, ld++;
|
|
i |= ((*lip & *lm) != *ld) << 19;
|
|
FR_DEBUG(("1c. %#08x & %#08x != %#08x\n",
|
|
*lip, *lm, *ld));
|
|
lip++, lm++, ld++;
|
|
i |= ((*lip & *lm) != *ld) << 19;
|
|
FR_DEBUG(("1d. %#08x & %#08x != %#08x\n",
|
|
*lip, *lm, *ld));
|
|
} else {
|
|
lip += 3;
|
|
lm += 3;
|
|
ld += 3;
|
|
}
|
|
i ^= (fr->fr_flags & FR_NOTSRCIP);
|
|
if (i)
|
|
continue;
|
|
lip++, lm++, ld++;
|
|
i |= ((*lip & *lm) != *ld) << 20;
|
|
FR_DEBUG(("2a. %#08x & %#08x != %#08x\n",
|
|
*lip, *lm, *ld));
|
|
if (fi->fi_v == 6) {
|
|
lip++, lm++, ld++;
|
|
i |= ((*lip & *lm) != *ld) << 20;
|
|
FR_DEBUG(("2b. %#08x & %#08x != %#08x\n",
|
|
*lip, *lm, *ld));
|
|
lip++, lm++, ld++;
|
|
i |= ((*lip & *lm) != *ld) << 20;
|
|
FR_DEBUG(("2c. %#08x & %#08x != %#08x\n",
|
|
*lip, *lm, *ld));
|
|
lip++, lm++, ld++;
|
|
i |= ((*lip & *lm) != *ld) << 20;
|
|
FR_DEBUG(("2d. %#08x & %#08x != %#08x\n",
|
|
*lip, *lm, *ld));
|
|
} else {
|
|
lip += 3;
|
|
lm += 3;
|
|
ld += 3;
|
|
}
|
|
i ^= (fr->fr_flags & FR_NOTDSTIP);
|
|
if (i)
|
|
continue;
|
|
lip++, lm++, ld++;
|
|
i |= ((*lip & *lm) != *ld);
|
|
FR_DEBUG(("3. %#08x & %#08x != %#08x\n",
|
|
*lip, *lm, *ld));
|
|
lip++, lm++, ld++;
|
|
i |= ((*lip & *lm) != *ld);
|
|
FR_DEBUG(("4. %#08x & %#08x != %#08x\n",
|
|
*lip, *lm, *ld));
|
|
if (i)
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* If a fragment, then only the first has what we're looking
|
|
* for here...
|
|
*/
|
|
if (!portcmp && (fr->fr_dcmp || fr->fr_scmp || fr->fr_tcpf ||
|
|
fr->fr_tcpfm))
|
|
continue;
|
|
if (fi->fi_fl & FI_TCPUDP) {
|
|
if (!fr_tcpudpchk(&fr->fr_tuc, fin))
|
|
continue;
|
|
} else if (fr->fr_icmpm || fr->fr_icmp) {
|
|
if ((fi->fi_p != IPPROTO_ICMP) || off ||
|
|
(fin->fin_dlen < 2))
|
|
continue;
|
|
if ((fin->fin_data[0] & fr->fr_icmpm) != fr->fr_icmp) {
|
|
FR_DEBUG(("i. %#x & %#x != %#x\n",
|
|
fin->fin_data[0], fr->fr_icmpm,
|
|
fr->fr_icmp));
|
|
continue;
|
|
}
|
|
}
|
|
FR_VERBOSE(("*"));
|
|
/*
|
|
* Just log this packet...
|
|
*/
|
|
passt = fr->fr_flags;
|
|
#if (BSD >= 199306) && (defined(_KERNEL) || defined(KERNEL))
|
|
if (securelevel <= 0)
|
|
#endif
|
|
if ((passt & FR_CALLNOW) && fr->fr_func)
|
|
passt = (*fr->fr_func)(passt, ip, fin);
|
|
fin->fin_fr = fr;
|
|
#ifdef IPFILTER_LOG
|
|
if ((passt & FR_LOGMASK) == FR_LOG) {
|
|
if (!IPLLOG(passt, ip, fin, m)) {
|
|
if (passt & FR_LOGORBLOCK)
|
|
passt |= FR_BLOCK|FR_QUICK;
|
|
ATOMIC_INCL(frstats[fin->fin_out].fr_skip);
|
|
}
|
|
ATOMIC_INCL(frstats[fin->fin_out].fr_pkl);
|
|
logged = 1;
|
|
}
|
|
#endif /* IPFILTER_LOG */
|
|
if (!(skip = fr->fr_skip) && (passt & FR_LOGMASK) != FR_LOG)
|
|
pass = passt;
|
|
FR_DEBUG(("pass %#x\n", pass));
|
|
ATOMIC_INCL(fr->fr_hits);
|
|
if (pass & FR_ACCOUNT)
|
|
fr->fr_bytes += (U_QUAD_T)ip->ip_len;
|
|
else
|
|
fin->fin_icode = fr->fr_icode;
|
|
fin->fin_rule = rulen;
|
|
fin->fin_group = fr->fr_group;
|
|
if (fr->fr_grp) {
|
|
fin->fin_fr = fr->fr_grp;
|
|
pass = fr_scanlist(pass, ip, fin, m);
|
|
if (fin->fin_fr == NULL) {
|
|
fin->fin_rule = rulen;
|
|
fin->fin_group = fr->fr_group;
|
|
fin->fin_fr = fr;
|
|
}
|
|
if (pass & FR_DONTCACHE)
|
|
logged = 1;
|
|
}
|
|
if (pass & FR_QUICK)
|
|
break;
|
|
}
|
|
if (logged)
|
|
pass |= FR_DONTCACHE;
|
|
return pass;
|
|
}
|
|
|
|
|
|
/*
|
|
* frcheck - filter check
|
|
* check using source and destination addresses/ports in a packet whether
|
|
* or not to pass it on or not.
|
|
*/
|
|
int fr_check(ip, hlen, ifp, out
|
|
#if defined(_KERNEL) && SOLARIS
|
|
, qif, mp)
|
|
qif_t *qif;
|
|
#else
|
|
, mp)
|
|
#endif
|
|
mb_t **mp;
|
|
ip_t *ip;
|
|
int hlen;
|
|
void *ifp;
|
|
int out;
|
|
{
|
|
/*
|
|
* The above really sucks, but short of writing a diff
|
|
*/
|
|
fr_info_t frinfo, *fc;
|
|
register fr_info_t *fin = &frinfo;
|
|
int changed, error = EHOSTUNREACH, v = ip->ip_v;
|
|
frentry_t *fr = NULL, *list;
|
|
u_32_t pass, apass;
|
|
#if !SOLARIS || !defined(_KERNEL)
|
|
register mb_t *m = *mp;
|
|
#endif
|
|
|
|
#ifdef _KERNEL
|
|
mb_t *mc = NULL;
|
|
int p, len;
|
|
# if !defined(__SVR4) && !defined(__svr4__)
|
|
# ifdef __sgi
|
|
char hbuf[(0xf << 2) + sizeof(struct icmp) + sizeof(ip_t) + 8];
|
|
# endif
|
|
int up;
|
|
|
|
# ifdef M_CANFASTFWD
|
|
/*
|
|
* XXX For now, IP Filter and fast-forwarding of cached flows
|
|
* XXX are mutually exclusive. Eventually, IP Filter should
|
|
* XXX get a "can-fast-forward" filter rule.
|
|
*/
|
|
m->m_flags &= ~M_CANFASTFWD;
|
|
# endif /* M_CANFASTFWD */
|
|
# ifdef CSUM_DELAY_DATA
|
|
/*
|
|
* disable delayed checksums.
|
|
*/
|
|
if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
|
|
in_delayed_cksum(m);
|
|
m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
|
|
}
|
|
# endif /* CSUM_DELAY_DATA */
|
|
|
|
# ifdef USE_INET6
|
|
if (v == 6) {
|
|
len = ntohs(((ip6_t*)ip)->ip6_plen);
|
|
p = ((ip6_t *)ip)->ip6_nxt;
|
|
} else
|
|
# endif
|
|
{
|
|
p = ip->ip_p;
|
|
len = ip->ip_len;
|
|
}
|
|
|
|
if ((p == IPPROTO_TCP || p == IPPROTO_UDP || p == IPPROTO_ICMP
|
|
# ifdef USE_INET6
|
|
|| (v == 6 && p == IPPROTO_ICMPV6)
|
|
# endif
|
|
)) {
|
|
int plen = 0;
|
|
|
|
if ((v == 6) || (ip->ip_off & IP_OFFMASK) == 0)
|
|
switch(p)
|
|
{
|
|
case IPPROTO_TCP:
|
|
plen = sizeof(tcphdr_t);
|
|
break;
|
|
case IPPROTO_UDP:
|
|
plen = sizeof(udphdr_t);
|
|
break;
|
|
/* 96 - enough for complete ICMP error IP header */
|
|
case IPPROTO_ICMP:
|
|
# ifdef USE_INET6
|
|
case IPPROTO_ICMPV6 :
|
|
# endif
|
|
plen = ICMPERR_MAXPKTLEN - sizeof(ip_t);
|
|
break;
|
|
}
|
|
up = MIN(hlen + plen, len);
|
|
|
|
if (up > m->m_len) {
|
|
# ifdef __sgi
|
|
/* Under IRIX, avoid m_pullup as it makes ping <hostname> panic */
|
|
if ((up > sizeof(hbuf)) || (m_length(m) < up)) {
|
|
ATOMIC_INCL(frstats[out].fr_pull[1]);
|
|
return -1;
|
|
}
|
|
m_copydata(m, 0, up, hbuf);
|
|
ATOMIC_INCL(frstats[out].fr_pull[0]);
|
|
ip = (ip_t *)hbuf;
|
|
# else /* __ sgi */
|
|
# ifndef linux
|
|
if ((*mp = m_pullup(m, up)) == 0) {
|
|
ATOMIC_INCL(frstats[out].fr_pull[1]);
|
|
return -1;
|
|
} else {
|
|
ATOMIC_INCL(frstats[out].fr_pull[0]);
|
|
m = *mp;
|
|
ip = mtod(m, ip_t *);
|
|
}
|
|
# endif /* !linux */
|
|
# endif /* __sgi */
|
|
} else
|
|
up = 0;
|
|
} else
|
|
up = 0;
|
|
# endif /* !defined(__SVR4) && !defined(__svr4__) */
|
|
# if SOLARIS
|
|
mb_t *m = qif->qf_m;
|
|
|
|
if ((u_int)ip & 0x3)
|
|
return 2;
|
|
fin->fin_qfm = m;
|
|
fin->fin_qif = qif;
|
|
# endif
|
|
#endif /* _KERNEL */
|
|
|
|
#ifndef __FreeBSD__
|
|
/*
|
|
* Be careful here: ip_id is in network byte order when called
|
|
* from ip_output()
|
|
*/
|
|
if ((out) && (v == 4))
|
|
ip->ip_id = ntohs(ip->ip_id);
|
|
#endif
|
|
|
|
changed = 0;
|
|
fin->fin_ifp = ifp;
|
|
fin->fin_v = v;
|
|
fin->fin_out = out;
|
|
fin->fin_mp = mp;
|
|
fr_makefrip(hlen, ip, fin);
|
|
|
|
#ifdef _KERNEL
|
|
# ifdef USE_INET6
|
|
if (v == 6) {
|
|
ATOMIC_INCL(frstats[0].fr_ipv6[out]);
|
|
} else
|
|
# endif
|
|
if (!out && fr_chksrc && !fr_verifysrc(ip->ip_src, ifp)) {
|
|
ATOMIC_INCL(frstats[0].fr_badsrc);
|
|
# ifdef IPFILTER_LOG
|
|
if (fr_chksrc == 2) {
|
|
fin->fin_group = -2;
|
|
pass = FR_INQUE|FR_NOMATCH|FR_LOGB;
|
|
(void) IPLLOG(pass, ip, fin, m);
|
|
}
|
|
# endif
|
|
# if !SOLARIS
|
|
m_freem(m);
|
|
# endif
|
|
return error;
|
|
}
|
|
#endif
|
|
pass = fr_pass;
|
|
if (fin->fin_fi.fi_fl & FI_SHORT) {
|
|
ATOMIC_INCL(frstats[out].fr_short);
|
|
}
|
|
|
|
READ_ENTER(&ipf_mutex);
|
|
|
|
if (fin->fin_fi.fi_fl & FI_SHORT)
|
|
ATOMIC_INCL(frstats[out].fr_short);
|
|
|
|
/*
|
|
* Check auth now. This, combined with the check below to see if apass
|
|
* is 0 is to ensure that we don't count the packet twice, which can
|
|
* otherwise occur when we reprocess it. As it is, we only count it
|
|
* after it has no auth. table matchup. This also stops NAT from
|
|
* occuring until after the packet has been auth'd.
|
|
*/
|
|
apass = fr_checkauth(ip, fin);
|
|
|
|
if (!out) {
|
|
#ifdef USE_INET6
|
|
if (v == 6)
|
|
list = ipacct6[0][fr_active];
|
|
else
|
|
#endif
|
|
list = ipacct[0][fr_active];
|
|
changed = ip_natin(ip, fin);
|
|
if (!apass && (fin->fin_fr = list) &&
|
|
(fr_scanlist(FR_NOMATCH, ip, fin, m) & FR_ACCOUNT)) {
|
|
ATOMIC_INCL(frstats[0].fr_acct);
|
|
}
|
|
}
|
|
|
|
if (apass || (!(fr = ipfr_knownfrag(ip, fin)) &&
|
|
!(fr = fr_checkstate(ip, fin)))) {
|
|
/*
|
|
* If a packet is found in the auth table, then skip checking
|
|
* the access lists for permission but we do need to consider
|
|
* the result as if it were from the ACL's.
|
|
*/
|
|
if (!apass) {
|
|
fc = frcache + out;
|
|
if (!bcmp((char *)fin, (char *)fc, FI_CSIZE)) {
|
|
/*
|
|
* copy cached data so we can unlock the mutex
|
|
* earlier.
|
|
*/
|
|
bcopy((char *)fc, (char *)fin, FI_COPYSIZE);
|
|
ATOMIC_INCL(frstats[out].fr_chit);
|
|
if ((fr = fin->fin_fr)) {
|
|
ATOMIC_INCL(fr->fr_hits);
|
|
pass = fr->fr_flags;
|
|
}
|
|
} else {
|
|
#ifdef USE_INET6
|
|
if (v == 6)
|
|
list = ipfilter6[out][fr_active];
|
|
else
|
|
#endif
|
|
list = ipfilter[out][fr_active];
|
|
if ((fin->fin_fr = list))
|
|
pass = fr_scanlist(fr_pass, ip, fin, m);
|
|
if (!(pass & (FR_KEEPSTATE|FR_DONTCACHE)))
|
|
bcopy((char *)fin, (char *)fc,
|
|
FI_COPYSIZE);
|
|
if (pass & FR_NOMATCH) {
|
|
ATOMIC_INCL(frstats[out].fr_nom);
|
|
}
|
|
}
|
|
fr = fin->fin_fr;
|
|
} else
|
|
pass = apass;
|
|
|
|
/*
|
|
* If we fail to add a packet to the authorization queue,
|
|
* then we drop the packet later. However, if it was added
|
|
* then pretend we've dropped it already.
|
|
*/
|
|
if ((pass & FR_AUTH))
|
|
if (fr_newauth((mb_t *)m, fin, ip) != 0)
|
|
#ifdef _KERNEL
|
|
m = *mp = NULL;
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
if (pass & FR_PREAUTH) {
|
|
READ_ENTER(&ipf_auth);
|
|
if ((fin->fin_fr = ipauth) &&
|
|
(pass = fr_scanlist(0, ip, fin, m))) {
|
|
ATOMIC_INCL(fr_authstats.fas_hits);
|
|
} else {
|
|
ATOMIC_INCL(fr_authstats.fas_miss);
|
|
}
|
|
RWLOCK_EXIT(&ipf_auth);
|
|
}
|
|
|
|
fin->fin_fr = fr;
|
|
if ((pass & (FR_KEEPFRAG|FR_KEEPSTATE)) == FR_KEEPFRAG) {
|
|
if (fin->fin_fi.fi_fl & FI_FRAG) {
|
|
if (ipfr_newfrag(ip, fin, pass) == -1) {
|
|
ATOMIC_INCL(frstats[out].fr_bnfr);
|
|
} else {
|
|
ATOMIC_INCL(frstats[out].fr_nfr);
|
|
}
|
|
} else {
|
|
ATOMIC_INCL(frstats[out].fr_cfr);
|
|
}
|
|
}
|
|
if (pass & FR_KEEPSTATE) {
|
|
if (fr_addstate(ip, fin, 0) == NULL) {
|
|
ATOMIC_INCL(frstats[out].fr_bads);
|
|
} else {
|
|
ATOMIC_INCL(frstats[out].fr_ads);
|
|
}
|
|
}
|
|
} else if (fr != NULL) {
|
|
pass = fr->fr_flags;
|
|
if (pass & FR_LOGFIRST)
|
|
pass &= ~(FR_LOGFIRST|FR_LOG);
|
|
}
|
|
|
|
#if (BSD >= 199306) && (defined(_KERNEL) || defined(KERNEL))
|
|
if (securelevel <= 0)
|
|
#endif
|
|
if (fr && fr->fr_func && !(pass & FR_CALLNOW))
|
|
pass = (*fr->fr_func)(pass, ip, fin);
|
|
|
|
/*
|
|
* Only count/translate packets which will be passed on, out the
|
|
* interface.
|
|
*/
|
|
if (out && (pass & FR_PASS)) {
|
|
#ifdef USE_INET6
|
|
if (v == 6)
|
|
list = ipacct6[1][fr_active];
|
|
else
|
|
#endif
|
|
list = ipacct[1][fr_active];
|
|
if ((fin->fin_fr = list) &&
|
|
(fr_scanlist(FR_NOMATCH, ip, fin, m) & FR_ACCOUNT)) {
|
|
ATOMIC_INCL(frstats[1].fr_acct);
|
|
}
|
|
fin->fin_fr = fr;
|
|
changed = ip_natout(ip, fin);
|
|
} else
|
|
fin->fin_fr = fr;
|
|
RWLOCK_EXIT(&ipf_mutex);
|
|
|
|
#ifdef IPFILTER_LOG
|
|
if ((fr_flags & FF_LOGGING) || (pass & FR_LOGMASK)) {
|
|
if ((fr_flags & FF_LOGNOMATCH) && (pass & FR_NOMATCH)) {
|
|
pass |= FF_LOGNOMATCH;
|
|
ATOMIC_INCL(frstats[out].fr_npkl);
|
|
goto logit;
|
|
} else if (((pass & FR_LOGMASK) == FR_LOGP) ||
|
|
((pass & FR_PASS) && (fr_flags & FF_LOGPASS))) {
|
|
if ((pass & FR_LOGMASK) != FR_LOGP)
|
|
pass |= FF_LOGPASS;
|
|
ATOMIC_INCL(frstats[out].fr_ppkl);
|
|
goto logit;
|
|
} else if (((pass & FR_LOGMASK) == FR_LOGB) ||
|
|
((pass & FR_BLOCK) && (fr_flags & FF_LOGBLOCK))) {
|
|
if ((pass & FR_LOGMASK) != FR_LOGB)
|
|
pass |= FF_LOGBLOCK;
|
|
ATOMIC_INCL(frstats[out].fr_bpkl);
|
|
logit:
|
|
if (!IPLLOG(pass, ip, fin, m)) {
|
|
ATOMIC_INCL(frstats[out].fr_skip);
|
|
if ((pass & (FR_PASS|FR_LOGORBLOCK)) ==
|
|
(FR_PASS|FR_LOGORBLOCK))
|
|
pass ^= FR_PASS|FR_BLOCK;
|
|
}
|
|
}
|
|
}
|
|
#endif /* IPFILTER_LOG */
|
|
|
|
#ifndef __FreeBSD__
|
|
if ((out) && (v == 4))
|
|
ip->ip_id = htons(ip->ip_id);
|
|
#endif
|
|
|
|
#ifdef _KERNEL
|
|
/*
|
|
* Only allow FR_DUP to work if a rule matched - it makes no sense to
|
|
* set FR_DUP as a "default" as there are no instructions about where
|
|
* to send the packet.
|
|
*/
|
|
if (fr && (pass & FR_DUP))
|
|
# if SOLARIS
|
|
mc = dupmsg(m);
|
|
# else
|
|
# ifndef linux
|
|
mc = m_copy(m, 0, M_COPYALL);
|
|
# else
|
|
;
|
|
# endif
|
|
# endif
|
|
#endif
|
|
if (pass & FR_PASS) {
|
|
ATOMIC_INCL(frstats[out].fr_pass);
|
|
} else if (pass & FR_BLOCK) {
|
|
ATOMIC_INCL(frstats[out].fr_block);
|
|
/*
|
|
* Should we return an ICMP packet to indicate error
|
|
* status passing through the packet filter ?
|
|
* WARNING: ICMP error packets AND TCP RST packets should
|
|
* ONLY be sent in repsonse to incoming packets. Sending them
|
|
* in response to outbound packets can result in a panic on
|
|
* some operating systems.
|
|
*/
|
|
if (!out) {
|
|
#ifdef _KERNEL
|
|
if (pass & FR_RETICMP) {
|
|
int dst;
|
|
|
|
if ((pass & FR_RETMASK) == FR_FAKEICMP)
|
|
dst = 1;
|
|
else
|
|
dst = 0;
|
|
send_icmp_err(ip, ICMP_UNREACH, fin, dst);
|
|
ATOMIC_INCL(frstats[0].fr_ret);
|
|
} else if (((pass & FR_RETMASK) == FR_RETRST) &&
|
|
!(fin->fin_fi.fi_fl & FI_SHORT)) {
|
|
if (send_reset(ip, fin) == 0) {
|
|
ATOMIC_INCL(frstats[1].fr_ret);
|
|
}
|
|
}
|
|
#else
|
|
if ((pass & FR_RETMASK) == FR_RETICMP) {
|
|
verbose("- ICMP unreachable sent\n");
|
|
ATOMIC_INCL(frstats[0].fr_ret);
|
|
} else if ((pass & FR_RETMASK) == FR_FAKEICMP) {
|
|
verbose("- forged ICMP unreachable sent\n");
|
|
ATOMIC_INCL(frstats[0].fr_ret);
|
|
} else if (((pass & FR_RETMASK) == FR_RETRST) &&
|
|
!(fin->fin_fi.fi_fl & FI_SHORT)) {
|
|
verbose("- TCP RST sent\n");
|
|
ATOMIC_INCL(frstats[1].fr_ret);
|
|
}
|
|
#endif
|
|
} else {
|
|
if (pass & FR_RETRST)
|
|
error = ECONNRESET;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we didn't drop off the bottom of the list of rules (and thus
|
|
* the 'current' rule fr is not NULL), then we may have some extra
|
|
* instructions about what to do with a packet.
|
|
* Once we're finished return to our caller, freeing the packet if
|
|
* we are dropping it (* BSD ONLY *).
|
|
*/
|
|
if ((changed == -1) && (pass & FR_PASS)) {
|
|
pass &= ~FR_PASS;
|
|
pass |= FR_BLOCK;
|
|
}
|
|
#if defined(_KERNEL)
|
|
# if !SOLARIS
|
|
# if !defined(linux)
|
|
if (fr) {
|
|
frdest_t *fdp = &fr->fr_tif;
|
|
|
|
if (((pass & FR_FASTROUTE) && !out) ||
|
|
(fdp->fd_ifp && fdp->fd_ifp != (struct ifnet *)-1)) {
|
|
if (ipfr_fastroute(m, fin, fdp) == 0)
|
|
m = *mp = NULL;
|
|
}
|
|
if (mc)
|
|
ipfr_fastroute(mc, fin, &fr->fr_dif);
|
|
}
|
|
if (!(pass & FR_PASS) && m)
|
|
m_freem(m);
|
|
# ifdef __sgi
|
|
else if (changed && up && m)
|
|
m_copyback(m, 0, up, hbuf);
|
|
# endif
|
|
# endif /* !linux */
|
|
# else /* !SOLARIS */
|
|
if (fr) {
|
|
frdest_t *fdp = &fr->fr_tif;
|
|
|
|
if (((pass & FR_FASTROUTE) && !out) ||
|
|
(fdp->fd_ifp && fdp->fd_ifp != (struct ifnet *)-1)) {
|
|
if (ipfr_fastroute(ip, m, mp, fin, fdp) == 0)
|
|
m = *mp = NULL;
|
|
}
|
|
if (mc)
|
|
ipfr_fastroute(ip, mc, mp, fin, &fr->fr_dif);
|
|
}
|
|
# endif /* !SOLARIS */
|
|
return (pass & FR_PASS) ? 0 : error;
|
|
#else /* _KERNEL */
|
|
if (pass & FR_NOMATCH)
|
|
return 1;
|
|
if (pass & FR_PASS)
|
|
return 0;
|
|
if (pass & FR_AUTH)
|
|
return -2;
|
|
return -1;
|
|
#endif /* _KERNEL */
|
|
}
|
|
|
|
|
|
/*
|
|
* ipf_cksum
|
|
* addr should be 16bit aligned and len is in bytes.
|
|
* length is in bytes
|
|
*/
|
|
u_short ipf_cksum(addr, len)
|
|
register u_short *addr;
|
|
register int len;
|
|
{
|
|
register u_32_t sum = 0;
|
|
|
|
for (sum = 0; len > 1; len -= 2)
|
|
sum += *addr++;
|
|
|
|
/* mop up an odd byte, if necessary */
|
|
if (len == 1)
|
|
sum += *(u_char *)addr;
|
|
|
|
/*
|
|
* add back carry outs from top 16 bits to low 16 bits
|
|
*/
|
|
sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */
|
|
sum += (sum >> 16); /* add carry */
|
|
return (u_short)(~sum);
|
|
}
|
|
|
|
|
|
/*
|
|
* NB: This function assumes we've pullup'd enough for all of the IP header
|
|
* and the TCP header. We also assume that data blocks aren't allocated in
|
|
* odd sizes.
|
|
*/
|
|
u_short fr_tcpsum(m, ip, tcp)
|
|
mb_t *m;
|
|
ip_t *ip;
|
|
tcphdr_t *tcp;
|
|
{
|
|
u_short *sp, slen, ts;
|
|
u_int sum, sum2;
|
|
int hlen;
|
|
|
|
/*
|
|
* Add up IP Header portion
|
|
*/
|
|
hlen = ip->ip_hl << 2;
|
|
slen = ip->ip_len - hlen;
|
|
sum = htons((u_short)ip->ip_p);
|
|
sum += htons(slen);
|
|
sp = (u_short *)&ip->ip_src;
|
|
sum += *sp++; /* ip_src */
|
|
sum += *sp++;
|
|
sum += *sp++; /* ip_dst */
|
|
sum += *sp++;
|
|
ts = tcp->th_sum;
|
|
tcp->th_sum = 0;
|
|
#ifdef KERNEL
|
|
# if SOLARIS
|
|
sum2 = ip_cksum(m, hlen, sum); /* hlen == offset */
|
|
sum2 = (sum2 & 0xffff) + (sum2 >> 16);
|
|
sum2 = ~sum2 & 0xffff;
|
|
# else /* SOLARIS */
|
|
# if defined(BSD) || defined(sun)
|
|
# if BSD >= 199306
|
|
m->m_data += hlen;
|
|
# else
|
|
m->m_off += hlen;
|
|
# endif
|
|
m->m_len -= hlen;
|
|
sum2 = in_cksum(m, slen);
|
|
m->m_len += hlen;
|
|
# if BSD >= 199306
|
|
m->m_data -= hlen;
|
|
# else
|
|
m->m_off -= hlen;
|
|
# endif
|
|
/*
|
|
* Both sum and sum2 are partial sums, so combine them together.
|
|
*/
|
|
sum = (sum & 0xffff) + (sum >> 16);
|
|
sum = ~sum & 0xffff;
|
|
sum2 += sum;
|
|
sum2 = (sum2 & 0xffff) + (sum2 >> 16);
|
|
# else /* defined(BSD) || defined(sun) */
|
|
{
|
|
union {
|
|
u_char c[2];
|
|
u_short s;
|
|
} bytes;
|
|
u_short len = ip->ip_len;
|
|
# if defined(__sgi)
|
|
int add;
|
|
# endif
|
|
|
|
/*
|
|
* Add up IP Header portion
|
|
*/
|
|
sp = (u_short *)&ip->ip_src;
|
|
len -= (ip->ip_hl << 2);
|
|
sum = ntohs(IPPROTO_TCP);
|
|
sum += htons(len);
|
|
sum += *sp++; /* ip_src */
|
|
sum += *sp++;
|
|
sum += *sp++; /* ip_dst */
|
|
sum += *sp++;
|
|
if (sp != (u_short *)tcp)
|
|
sp = (u_short *)tcp;
|
|
sum += *sp++; /* sport */
|
|
sum += *sp++; /* dport */
|
|
sum += *sp++; /* seq */
|
|
sum += *sp++;
|
|
sum += *sp++; /* ack */
|
|
sum += *sp++;
|
|
sum += *sp++; /* off */
|
|
sum += *sp++; /* win */
|
|
sum += *sp++; /* Skip over checksum */
|
|
sum += *sp++; /* urp */
|
|
|
|
# ifdef __sgi
|
|
/*
|
|
* In case we had to copy the IP & TCP header out of mbufs,
|
|
* skip over the mbuf bits which are the header
|
|
*/
|
|
if ((caddr_t)ip != mtod(m, caddr_t)) {
|
|
hlen = (caddr_t)sp - (caddr_t)ip;
|
|
while (hlen) {
|
|
add = MIN(hlen, m->m_len);
|
|
sp = (u_short *)(mtod(m, caddr_t) + add);
|
|
hlen -= add;
|
|
if (add == m->m_len) {
|
|
m = m->m_next;
|
|
if (!hlen) {
|
|
if (!m)
|
|
break;
|
|
sp = mtod(m, u_short *);
|
|
}
|
|
PANIC((!m),("fr_tcpsum(1): not enough data"));
|
|
}
|
|
}
|
|
}
|
|
# endif
|
|
|
|
if (!(len -= sizeof(*tcp)))
|
|
goto nodata;
|
|
while (len > 1) {
|
|
if (((caddr_t)sp - mtod(m, caddr_t)) >= m->m_len) {
|
|
m = m->m_next;
|
|
PANIC((!m),("fr_tcpsum(2): not enough data"));
|
|
sp = mtod(m, u_short *);
|
|
}
|
|
if (((caddr_t)(sp + 1) - mtod(m, caddr_t)) > m->m_len) {
|
|
bytes.c[0] = *(u_char *)sp;
|
|
m = m->m_next;
|
|
PANIC((!m),("fr_tcpsum(3): not enough data"));
|
|
sp = mtod(m, u_short *);
|
|
bytes.c[1] = *(u_char *)sp;
|
|
sum += bytes.s;
|
|
sp = (u_short *)((u_char *)sp + 1);
|
|
}
|
|
if ((u_long)sp & 1) {
|
|
bcopy((char *)sp++, (char *)&bytes.s, sizeof(bytes.s));
|
|
sum += bytes.s;
|
|
} else
|
|
sum += *sp++;
|
|
len -= 2;
|
|
}
|
|
if (len)
|
|
sum += ntohs(*(u_char *)sp << 8);
|
|
nodata:
|
|
while (sum > 0xffff)
|
|
sum = (sum & 0xffff) + (sum >> 16);
|
|
sum2 = (u_short)(~sum & 0xffff);
|
|
}
|
|
# endif /* defined(BSD) || defined(sun) */
|
|
# endif /* SOLARIS */
|
|
#else /* KERNEL */
|
|
sum2 = 0;
|
|
#endif /* KERNEL */
|
|
tcp->th_sum = ts;
|
|
return sum2;
|
|
}
|
|
|
|
|
|
#if defined(_KERNEL) && ( ((BSD < 199306) && !SOLARIS) || defined(__sgi) )
|
|
/*
|
|
* Copyright (c) 1982, 1986, 1988, 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*
|
|
* @(#)uipc_mbuf.c 8.2 (Berkeley) 1/4/94
|
|
* $Id: fil.c,v 2.35.2.27 2000/10/26 21:20:54 darrenr Exp $
|
|
*/
|
|
/*
|
|
* Copy data from an mbuf chain starting "off" bytes from the beginning,
|
|
* continuing for "len" bytes, into the indicated buffer.
|
|
*/
|
|
void
|
|
m_copydata(m, off, len, cp)
|
|
register mb_t *m;
|
|
register int off;
|
|
register int len;
|
|
caddr_t cp;
|
|
{
|
|
register unsigned count;
|
|
|
|
if (off < 0 || len < 0)
|
|
panic("m_copydata");
|
|
while (off > 0) {
|
|
if (m == 0)
|
|
panic("m_copydata");
|
|
if (off < m->m_len)
|
|
break;
|
|
off -= m->m_len;
|
|
m = m->m_next;
|
|
}
|
|
while (len > 0) {
|
|
if (m == 0)
|
|
panic("m_copydata");
|
|
count = MIN(m->m_len - off, len);
|
|
bcopy(mtod(m, caddr_t) + off, cp, count);
|
|
len -= count;
|
|
cp += count;
|
|
off = 0;
|
|
m = m->m_next;
|
|
}
|
|
}
|
|
|
|
|
|
# ifndef linux
|
|
/*
|
|
* Copy data from a buffer back into the indicated mbuf chain,
|
|
* starting "off" bytes from the beginning, extending the mbuf
|
|
* chain if necessary.
|
|
*/
|
|
void
|
|
m_copyback(m0, off, len, cp)
|
|
struct mbuf *m0;
|
|
register int off;
|
|
register int len;
|
|
caddr_t cp;
|
|
{
|
|
register int mlen;
|
|
register struct mbuf *m = m0, *n;
|
|
int totlen = 0;
|
|
|
|
if (m0 == 0)
|
|
return;
|
|
while (off > (mlen = m->m_len)) {
|
|
off -= mlen;
|
|
totlen += mlen;
|
|
if (m->m_next == 0) {
|
|
n = m_getclr(M_DONTWAIT, m->m_type);
|
|
if (n == 0)
|
|
goto out;
|
|
n->m_len = min(MLEN, len + off);
|
|
m->m_next = n;
|
|
}
|
|
m = m->m_next;
|
|
}
|
|
while (len > 0) {
|
|
mlen = min (m->m_len - off, len);
|
|
bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen);
|
|
cp += mlen;
|
|
len -= mlen;
|
|
mlen += off;
|
|
off = 0;
|
|
totlen += mlen;
|
|
if (len == 0)
|
|
break;
|
|
if (m->m_next == 0) {
|
|
n = m_get(M_DONTWAIT, m->m_type);
|
|
if (n == 0)
|
|
break;
|
|
n->m_len = min(MLEN, len);
|
|
m->m_next = n;
|
|
}
|
|
m = m->m_next;
|
|
}
|
|
out:
|
|
#if 0
|
|
if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen))
|
|
m->m_pkthdr.len = totlen;
|
|
#endif
|
|
return;
|
|
}
|
|
# endif /* linux */
|
|
#endif /* (_KERNEL) && ( ((BSD < 199306) && !SOLARIS) || __sgi) */
|
|
|
|
|
|
frgroup_t *fr_findgroup(num, flags, which, set, fgpp)
|
|
u_32_t num, flags;
|
|
minor_t which;
|
|
int set;
|
|
frgroup_t ***fgpp;
|
|
{
|
|
frgroup_t *fg, **fgp;
|
|
|
|
if (which == IPL_LOGAUTH)
|
|
fgp = &ipfgroups[2][set];
|
|
else if (flags & FR_ACCOUNT)
|
|
fgp = &ipfgroups[1][set];
|
|
else if (flags & (FR_OUTQUE|FR_INQUE))
|
|
fgp = &ipfgroups[0][set];
|
|
else
|
|
return NULL;
|
|
num &= 0xffff;
|
|
|
|
while ((fg = *fgp))
|
|
if (fg->fg_num == num)
|
|
break;
|
|
else
|
|
fgp = &fg->fg_next;
|
|
if (fgpp)
|
|
*fgpp = fgp;
|
|
return fg;
|
|
}
|
|
|
|
|
|
frgroup_t *fr_addgroup(num, fp, which, set)
|
|
u_32_t num;
|
|
frentry_t *fp;
|
|
minor_t which;
|
|
int set;
|
|
{
|
|
frgroup_t *fg, **fgp;
|
|
|
|
if ((fg = fr_findgroup(num, fp->fr_flags, which, set, &fgp)))
|
|
return fg;
|
|
|
|
KMALLOC(fg, frgroup_t *);
|
|
if (fg) {
|
|
fg->fg_num = num;
|
|
fg->fg_next = *fgp;
|
|
fg->fg_head = fp;
|
|
fg->fg_start = &fp->fr_grp;
|
|
*fgp = fg;
|
|
}
|
|
return fg;
|
|
}
|
|
|
|
|
|
void fr_delgroup(num, flags, which, set)
|
|
u_32_t num, flags;
|
|
minor_t which;
|
|
int set;
|
|
{
|
|
frgroup_t *fg, **fgp;
|
|
|
|
if (!(fg = fr_findgroup(num, flags, which, set, &fgp)))
|
|
return;
|
|
|
|
*fgp = fg->fg_next;
|
|
KFREE(fg);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* recursively flush rules from the list, descending groups as they are
|
|
* encountered. if a rule is the head of a group and it has lost all its
|
|
* group members, then also delete the group reference.
|
|
*/
|
|
static int frflushlist(set, unit, nfreedp, listp)
|
|
int set;
|
|
minor_t unit;
|
|
int *nfreedp;
|
|
frentry_t **listp;
|
|
{
|
|
register int freed = 0, i;
|
|
register frentry_t *fp;
|
|
|
|
while ((fp = *listp)) {
|
|
*listp = fp->fr_next;
|
|
if (fp->fr_grp) {
|
|
i = frflushlist(set, unit, nfreedp, &fp->fr_grp);
|
|
MUTEX_ENTER(&ipf_rw);
|
|
fp->fr_ref -= i;
|
|
MUTEX_EXIT(&ipf_rw);
|
|
}
|
|
|
|
ATOMIC_DEC32(fp->fr_ref);
|
|
if (fp->fr_grhead) {
|
|
fr_delgroup(fp->fr_grhead, fp->fr_flags,
|
|
unit, set);
|
|
fp->fr_grhead = 0;
|
|
}
|
|
if (fp->fr_ref == 0) {
|
|
KFREE(fp);
|
|
freed++;
|
|
} else
|
|
fp->fr_next = NULL;
|
|
}
|
|
*nfreedp += freed;
|
|
return freed;
|
|
}
|
|
|
|
|
|
int frflush(unit, flags)
|
|
minor_t unit;
|
|
int flags;
|
|
{
|
|
int flushed = 0, set;
|
|
|
|
if (unit != IPL_LOGIPF)
|
|
return 0;
|
|
WRITE_ENTER(&ipf_mutex);
|
|
bzero((char *)frcache, sizeof(frcache[0]) * 2);
|
|
|
|
set = fr_active;
|
|
if (flags & FR_INACTIVE)
|
|
set = 1 - set;
|
|
|
|
if (flags & FR_OUTQUE) {
|
|
#ifdef USE_INET6
|
|
(void) frflushlist(set, unit, &flushed, &ipfilter6[1][set]);
|
|
(void) frflushlist(set, unit, &flushed, &ipacct6[1][set]);
|
|
#endif
|
|
(void) frflushlist(set, unit, &flushed, &ipfilter[1][set]);
|
|
(void) frflushlist(set, unit, &flushed, &ipacct[1][set]);
|
|
}
|
|
if (flags & FR_INQUE) {
|
|
#ifdef USE_INET6
|
|
(void) frflushlist(set, unit, &flushed, &ipfilter6[0][set]);
|
|
(void) frflushlist(set, unit, &flushed, &ipacct6[0][set]);
|
|
#endif
|
|
(void) frflushlist(set, unit, &flushed, &ipfilter[0][set]);
|
|
(void) frflushlist(set, unit, &flushed, &ipacct[0][set]);
|
|
}
|
|
RWLOCK_EXIT(&ipf_mutex);
|
|
return flushed;
|
|
}
|
|
|
|
|
|
char *memstr(src, dst, slen, dlen)
|
|
char *src, *dst;
|
|
int slen, dlen;
|
|
{
|
|
char *s = NULL;
|
|
|
|
while (dlen >= slen) {
|
|
if (bcmp(src, dst, slen) == 0) {
|
|
s = dst;
|
|
break;
|
|
}
|
|
dst++;
|
|
dlen--;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
|
|
void fixskip(listp, rp, addremove)
|
|
frentry_t **listp, *rp;
|
|
int addremove;
|
|
{
|
|
frentry_t *fp;
|
|
int rules = 0, rn = 0;
|
|
|
|
for (fp = *listp; fp && (fp != rp); fp = fp->fr_next, rules++)
|
|
;
|
|
|
|
if (!fp)
|
|
return;
|
|
|
|
for (fp = *listp; fp && (fp != rp); fp = fp->fr_next, rn++)
|
|
if (fp->fr_skip && (rn + fp->fr_skip >= rules))
|
|
fp->fr_skip += addremove;
|
|
}
|
|
|
|
|
|
#ifdef _KERNEL
|
|
/*
|
|
* count consecutive 1's in bit mask. If the mask generated by counting
|
|
* consecutive 1's is different to that passed, return -1, else return #
|
|
* of bits.
|
|
*/
|
|
int countbits(ip)
|
|
u_32_t ip;
|
|
{
|
|
u_32_t ipn;
|
|
int cnt = 0, i, j;
|
|
|
|
ip = ipn = ntohl(ip);
|
|
for (i = 32; i; i--, ipn *= 2)
|
|
if (ipn & 0x80000000)
|
|
cnt++;
|
|
else
|
|
break;
|
|
ipn = 0;
|
|
for (i = 32, j = cnt; i; i--, j--) {
|
|
ipn *= 2;
|
|
if (j > 0)
|
|
ipn++;
|
|
}
|
|
if (ipn == ip)
|
|
return cnt;
|
|
return -1;
|
|
}
|
|
|
|
|
|
/*
|
|
* return the first IP Address associated with an interface
|
|
*/
|
|
int fr_ifpaddr(v, ifptr, inp)
|
|
int v;
|
|
void *ifptr;
|
|
struct in_addr *inp;
|
|
{
|
|
# ifdef USE_INET6
|
|
struct in6_addr *inp6 = NULL;
|
|
# endif
|
|
# if SOLARIS
|
|
ill_t *ill = ifptr;
|
|
# else
|
|
struct ifnet *ifp = ifptr;
|
|
# endif
|
|
struct in_addr in;
|
|
|
|
# if SOLARIS
|
|
# ifdef USE_INET6
|
|
if (v == 6) {
|
|
struct in6_addr in6;
|
|
|
|
/*
|
|
* First is always link local.
|
|
*/
|
|
if (ill->ill_ipif->ipif_next)
|
|
in6 = ill->ill_ipif->ipif_next->ipif_v6lcl_addr;
|
|
else
|
|
bzero((char *)&in6, sizeof(in6));
|
|
bcopy((char *)&in6, (char *)inp, sizeof(in6));
|
|
} else
|
|
# endif
|
|
{
|
|
in.s_addr = ill->ill_ipif->ipif_local_addr;
|
|
*inp = in;
|
|
}
|
|
# else /* SOLARIS */
|
|
# if linux
|
|
;
|
|
# else /* linux */
|
|
struct sockaddr_in *sin;
|
|
struct ifaddr *ifa;
|
|
|
|
# if (__FreeBSD_version >= 300000)
|
|
ifa = TAILQ_FIRST(&ifp->if_addrhead);
|
|
# else
|
|
# if defined(__NetBSD__) || defined(__OpenBSD__)
|
|
ifa = ifp->if_addrlist.tqh_first;
|
|
# else
|
|
# if defined(__sgi) && defined(IFF_DRVRLOCK) /* IRIX 6 */
|
|
ifa = &((struct in_ifaddr *)ifp->in_ifaddr)->ia_ifa;
|
|
# else
|
|
ifa = ifp->if_addrlist;
|
|
# endif
|
|
# endif /* __NetBSD__ || __OpenBSD__ */
|
|
# endif /* __FreeBSD_version >= 300000 */
|
|
# if (BSD < 199306) && !(/*IRIX6*/defined(__sgi) && defined(IFF_DRVRLOCK))
|
|
sin = (struct sockaddr_in *)&ifa->ifa_addr;
|
|
# else
|
|
sin = (struct sockaddr_in *)ifa->ifa_addr;
|
|
while (sin && ifa) {
|
|
if ((v == 4) && (sin->sin_family == AF_INET))
|
|
break;
|
|
# ifdef USE_INET6
|
|
if ((v == 6) && (sin->sin_family == AF_INET6)) {
|
|
inp6 = &((struct sockaddr_in6 *)sin)->sin6_addr;
|
|
if (!IN6_IS_ADDR_LINKLOCAL(inp6) &&
|
|
!IN6_IS_ADDR_LOOPBACK(inp6))
|
|
break;
|
|
}
|
|
# endif
|
|
# if (__FreeBSD_version >= 300000)
|
|
ifa = TAILQ_NEXT(ifa, ifa_link);
|
|
# else
|
|
# if defined(__NetBSD__) || defined(__OpenBSD__)
|
|
ifa = ifa->ifa_list.tqe_next;
|
|
# else
|
|
ifa = ifa->ifa_next;
|
|
# endif
|
|
# endif /* __FreeBSD_version >= 300000 */
|
|
if (ifa)
|
|
sin = (struct sockaddr_in *)ifa->ifa_addr;
|
|
}
|
|
if (ifa == NULL)
|
|
sin = NULL;
|
|
if (sin == NULL)
|
|
return -1;
|
|
# endif /* (BSD < 199306) && (!__sgi && IFF_DRVLOCK) */
|
|
# ifdef USE_INET6
|
|
if (v == 6)
|
|
bcopy((char *)inp6, (char *)inp, sizeof(*inp6));
|
|
else
|
|
# endif
|
|
{
|
|
in = sin->sin_addr;
|
|
*inp = in;
|
|
}
|
|
# endif /* linux */
|
|
# endif /* SOLARIS */
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void frsynclist(fr)
|
|
register frentry_t *fr;
|
|
{
|
|
for (; fr; fr = fr->fr_next) {
|
|
if (fr->fr_ifa != NULL) {
|
|
fr->fr_ifa = GETUNIT(fr->fr_ifname, fr->fr_ip.fi_v);
|
|
if (fr->fr_ifa == NULL)
|
|
fr->fr_ifa = (void *)-1;
|
|
}
|
|
if (fr->fr_grp)
|
|
frsynclist(fr->fr_grp);
|
|
}
|
|
}
|
|
|
|
|
|
void frsync()
|
|
{
|
|
# if !SOLARIS
|
|
register struct ifnet *ifp;
|
|
|
|
# if defined(__OpenBSD__) || ((NetBSD >= 199511) && (NetBSD < 1991011)) || \
|
|
(defined(__FreeBSD_version) && (__FreeBSD_version >= 300000))
|
|
# if (NetBSD >= 199905) || defined(__OpenBSD__)
|
|
for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_list.tqe_next)
|
|
# else
|
|
for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next)
|
|
# endif
|
|
# else
|
|
for (ifp = ifnet; ifp; ifp = ifp->if_next)
|
|
# endif
|
|
{
|
|
ip_natsync(ifp);
|
|
ip_statesync(ifp);
|
|
}
|
|
ip_natsync((struct ifnet *)-1);
|
|
# endif
|
|
|
|
WRITE_ENTER(&ipf_mutex);
|
|
frsynclist(ipacct[0][fr_active]);
|
|
frsynclist(ipacct[1][fr_active]);
|
|
frsynclist(ipfilter[0][fr_active]);
|
|
frsynclist(ipfilter[1][fr_active]);
|
|
#ifdef USE_INET6
|
|
frsynclist(ipacct6[0][fr_active]);
|
|
frsynclist(ipacct6[1][fr_active]);
|
|
frsynclist(ipfilter6[0][fr_active]);
|
|
frsynclist(ipfilter6[1][fr_active]);
|
|
#endif
|
|
RWLOCK_EXIT(&ipf_mutex);
|
|
}
|
|
|
|
|
|
/*
|
|
* In the functions below, bcopy() is called because the pointer being
|
|
* copied _from_ in this instance is a pointer to a char buf (which could
|
|
* end up being unaligned) and on the kernel's local stack.
|
|
*/
|
|
int ircopyptr(a, b, c)
|
|
void *a, *b;
|
|
size_t c;
|
|
{
|
|
caddr_t ca;
|
|
int err;
|
|
|
|
#if SOLARIS
|
|
if (copyin(a, (char *)&ca, sizeof(ca)))
|
|
return EFAULT;
|
|
#else
|
|
bcopy(a, &ca, sizeof(ca));
|
|
#endif
|
|
err = copyin(ca, b, c);
|
|
if (err)
|
|
err = EFAULT;
|
|
return err;
|
|
}
|
|
|
|
|
|
int iwcopyptr(a, b, c)
|
|
void *a, *b;
|
|
size_t c;
|
|
{
|
|
caddr_t ca;
|
|
int err;
|
|
|
|
#if SOLARIS
|
|
if (copyin(b, (char *)&ca, sizeof(ca)))
|
|
return EFAULT;
|
|
#else
|
|
bcopy(b, &ca, sizeof(ca));
|
|
#endif
|
|
err = copyout(a, ca, c);
|
|
if (err)
|
|
err = EFAULT;
|
|
return err;
|
|
}
|
|
|
|
#else /* _KERNEL */
|
|
|
|
|
|
/*
|
|
* return the first IP Address associated with an interface
|
|
*/
|
|
int fr_ifpaddr(v, ifptr, inp)
|
|
int v;
|
|
void *ifptr;
|
|
struct in_addr *inp;
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
int ircopyptr(a, b, c)
|
|
void *a, *b;
|
|
size_t c;
|
|
{
|
|
caddr_t ca;
|
|
|
|
bcopy(a, &ca, sizeof(ca));
|
|
bcopy(ca, b, c);
|
|
return 0;
|
|
}
|
|
|
|
|
|
int iwcopyptr(a, b, c)
|
|
void *a, *b;
|
|
size_t c;
|
|
{
|
|
caddr_t ca;
|
|
|
|
bcopy(b, &ca, sizeof(ca));
|
|
bcopy(a, ca, c);
|
|
return 0;
|
|
}
|
|
|
|
|
|
#endif
|
|
|
|
|
|
int fr_lock(data, lockp)
|
|
caddr_t data;
|
|
int *lockp;
|
|
{
|
|
int arg, error;
|
|
|
|
error = IRCOPY(data, (caddr_t)&arg, sizeof(arg));
|
|
if (!error) {
|
|
error = IWCOPY((caddr_t)lockp, data, sizeof(*lockp));
|
|
if (!error)
|
|
*lockp = arg;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
|
|
void fr_getstat(fiop)
|
|
friostat_t *fiop;
|
|
{
|
|
bcopy((char *)frstats, (char *)fiop->f_st, sizeof(filterstats_t) * 2);
|
|
fiop->f_locks[0] = fr_state_lock;
|
|
fiop->f_locks[1] = fr_nat_lock;
|
|
fiop->f_locks[2] = fr_frag_lock;
|
|
fiop->f_locks[3] = fr_auth_lock;
|
|
fiop->f_fin[0] = ipfilter[0][0];
|
|
fiop->f_fin[1] = ipfilter[0][1];
|
|
fiop->f_fout[0] = ipfilter[1][0];
|
|
fiop->f_fout[1] = ipfilter[1][1];
|
|
fiop->f_acctin[0] = ipacct[0][0];
|
|
fiop->f_acctin[1] = ipacct[0][1];
|
|
fiop->f_acctout[0] = ipacct[1][0];
|
|
fiop->f_acctout[1] = ipacct[1][1];
|
|
#ifdef USE_INET6
|
|
fiop->f_fin6[0] = ipfilter6[0][0];
|
|
fiop->f_fin6[1] = ipfilter6[0][1];
|
|
fiop->f_fout6[0] = ipfilter6[1][0];
|
|
fiop->f_fout6[1] = ipfilter6[1][1];
|
|
fiop->f_acctin6[0] = ipacct6[0][0];
|
|
fiop->f_acctin6[1] = ipacct6[0][1];
|
|
fiop->f_acctout6[0] = ipacct6[1][0];
|
|
fiop->f_acctout6[1] = ipacct6[1][1];
|
|
#else
|
|
fiop->f_fin6[0] = NULL;
|
|
fiop->f_fin6[1] = NULL;
|
|
fiop->f_fout6[0] = NULL;
|
|
fiop->f_fout6[1] = NULL;
|
|
fiop->f_acctin6[0] = NULL;
|
|
fiop->f_acctin6[1] = NULL;
|
|
fiop->f_acctout6[0] = NULL;
|
|
fiop->f_acctout6[1] = NULL;
|
|
#endif
|
|
fiop->f_active = fr_active;
|
|
fiop->f_froute[0] = ipl_frouteok[0];
|
|
fiop->f_froute[1] = ipl_frouteok[1];
|
|
|
|
fiop->f_running = fr_running;
|
|
fiop->f_groups[0][0] = ipfgroups[0][0];
|
|
fiop->f_groups[0][1] = ipfgroups[0][1];
|
|
fiop->f_groups[1][0] = ipfgroups[1][0];
|
|
fiop->f_groups[1][1] = ipfgroups[1][1];
|
|
fiop->f_groups[2][0] = ipfgroups[2][0];
|
|
fiop->f_groups[2][1] = ipfgroups[2][1];
|
|
#ifdef IPFILTER_LOG
|
|
fiop->f_logging = 1;
|
|
#else
|
|
fiop->f_logging = 0;
|
|
#endif
|
|
fiop->f_defpass = fr_pass;
|
|
strncpy(fiop->f_version, ipfilter_version, sizeof(fiop->f_version));
|
|
}
|
|
|
|
|
|
#ifdef USE_INET6
|
|
int icmptoicmp6types[ICMP_MAXTYPE+1] = {
|
|
ICMP6_ECHO_REPLY, /* 0: ICMP_ECHOREPLY */
|
|
-1, /* 1: UNUSED */
|
|
-1, /* 2: UNUSED */
|
|
ICMP6_DST_UNREACH, /* 3: ICMP_UNREACH */
|
|
-1, /* 4: ICMP_SOURCEQUENCH */
|
|
ND_REDIRECT, /* 5: ICMP_REDIRECT */
|
|
-1, /* 6: UNUSED */
|
|
-1, /* 7: UNUSED */
|
|
ICMP6_ECHO_REQUEST, /* 8: ICMP_ECHO */
|
|
-1, /* 9: UNUSED */
|
|
-1, /* 10: UNUSED */
|
|
ICMP6_TIME_EXCEEDED, /* 11: ICMP_TIMXCEED */
|
|
ICMP6_PARAM_PROB, /* 12: ICMP_PARAMPROB */
|
|
-1, /* 13: ICMP_TSTAMP */
|
|
-1, /* 14: ICMP_TSTAMPREPLY */
|
|
-1, /* 15: ICMP_IREQ */
|
|
-1, /* 16: ICMP_IREQREPLY */
|
|
-1, /* 17: ICMP_MASKREQ */
|
|
-1, /* 18: ICMP_MASKREPLY */
|
|
};
|
|
|
|
|
|
int icmptoicmp6unreach[ICMP_MAX_UNREACH] = {
|
|
ICMP6_DST_UNREACH_ADDR, /* 0: ICMP_UNREACH_NET */
|
|
ICMP6_DST_UNREACH_ADDR, /* 1: ICMP_UNREACH_HOST */
|
|
-1, /* 2: ICMP_UNREACH_PROTOCOL */
|
|
ICMP6_DST_UNREACH_NOPORT, /* 3: ICMP_UNREACH_PORT */
|
|
-1, /* 4: ICMP_UNREACH_NEEDFRAG */
|
|
ICMP6_DST_UNREACH_NOTNEIGHBOR, /* 5: ICMP_UNREACH_SRCFAIL */
|
|
ICMP6_DST_UNREACH_ADDR, /* 6: ICMP_UNREACH_NET_UNKNOWN */
|
|
ICMP6_DST_UNREACH_ADDR, /* 7: ICMP_UNREACH_HOST_UNKNOWN */
|
|
-1, /* 8: ICMP_UNREACH_ISOLATED */
|
|
ICMP6_DST_UNREACH_ADMIN, /* 9: ICMP_UNREACH_NET_PROHIB */
|
|
ICMP6_DST_UNREACH_ADMIN, /* 10: ICMP_UNREACH_HOST_PROHIB */
|
|
-1, /* 11: ICMP_UNREACH_TOSNET */
|
|
-1, /* 12: ICMP_UNREACH_TOSHOST */
|
|
ICMP6_DST_UNREACH_ADMIN, /* 13: ICMP_UNREACH_ADMIN_PROHIBIT */
|
|
};
|
|
#endif
|