189 lines
4.5 KiB
C
189 lines
4.5 KiB
C
/*
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* Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
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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: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-pflog.c,v 1.16 2007-09-12 19:36:18 guy Exp $ (LBL)";
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifndef HAVE_NET_PFVAR_H
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#error "No pf headers available"
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#endif
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/pfvar.h>
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#include <net/if_pflog.h>
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#include <tcpdump-stdinc.h>
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#include <stdio.h>
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#include <pcap.h>
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#include "extract.h"
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#include "interface.h"
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#include "addrtoname.h"
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static struct tok pf_reasons[] = {
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{ 0, "0(match)" },
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{ 1, "1(bad-offset)" },
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{ 2, "2(fragment)" },
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{ 3, "3(short)" },
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{ 4, "4(normalize)" },
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{ 5, "5(memory)" },
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{ 6, "6(bad-timestamp)" },
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{ 7, "7(congestion)" },
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{ 8, "8(ip-option)" },
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{ 9, "9(proto-cksum)" },
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{ 10, "10(state-mismatch)" },
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{ 11, "11(state-insert)" },
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{ 12, "12(state-limit)" },
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{ 13, "13(src-limit)" },
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{ 14, "14(synproxy)" },
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{ 0, NULL }
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};
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static struct tok pf_actions[] = {
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{ PF_PASS, "pass" },
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{ PF_DROP, "block" },
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{ PF_SCRUB, "scrub" },
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{ PF_NAT, "nat" },
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{ PF_NONAT, "nat" },
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{ PF_BINAT, "binat" },
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{ PF_NOBINAT, "binat" },
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{ PF_RDR, "rdr" },
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{ PF_NORDR, "rdr" },
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{ PF_SYNPROXY_DROP, "synproxy-drop" },
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{ 0, NULL }
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};
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static struct tok pf_directions[] = {
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{ PF_INOUT, "in/out" },
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{ PF_IN, "in" },
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{ PF_OUT, "out" },
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{ 0, NULL }
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};
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/* For reading capture files on other systems */
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#define OPENBSD_AF_INET 2
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#define OPENBSD_AF_INET6 24
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static void
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pflog_print(const struct pfloghdr *hdr)
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{
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u_int32_t rulenr, subrulenr;
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rulenr = EXTRACT_32BITS(&hdr->rulenr);
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subrulenr = EXTRACT_32BITS(&hdr->subrulenr);
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if (subrulenr == (u_int32_t)-1)
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printf("rule %u/", rulenr);
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else
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printf("rule %u.%s.%u/", rulenr, hdr->ruleset, subrulenr);
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printf("%s: %s %s on %s: ",
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tok2str(pf_reasons, "unkn(%u)", hdr->reason),
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tok2str(pf_actions, "unkn(%u)", hdr->action),
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tok2str(pf_directions, "unkn(%u)", hdr->dir),
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hdr->ifname);
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}
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u_int
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pflog_if_print(const struct pcap_pkthdr *h, register const u_char *p)
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{
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u_int length = h->len;
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u_int hdrlen;
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u_int caplen = h->caplen;
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const struct pfloghdr *hdr;
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u_int8_t af;
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/* check length */
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if (caplen < sizeof(u_int8_t)) {
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printf("[|pflog]");
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return (caplen);
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}
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#define MIN_PFLOG_HDRLEN 45
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hdr = (struct pfloghdr *)p;
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if (hdr->length < MIN_PFLOG_HDRLEN) {
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printf("[pflog: invalid header length!]");
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return (hdr->length); /* XXX: not really */
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}
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hdrlen = BPF_WORDALIGN(hdr->length);
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if (caplen < hdrlen) {
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printf("[|pflog]");
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return (hdrlen); /* XXX: true? */
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}
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/* print what we know */
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hdr = (struct pfloghdr *)p;
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TCHECK(*hdr);
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if (eflag)
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pflog_print(hdr);
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/* skip to the real packet */
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af = hdr->af;
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length -= hdrlen;
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caplen -= hdrlen;
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p += hdrlen;
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switch (af) {
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case AF_INET:
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#if OPENBSD_AF_INET != AF_INET
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case OPENBSD_AF_INET: /* XXX: read pcap files */
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#endif
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ip_print(gndo, p, length);
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break;
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#ifdef INET6
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case AF_INET6:
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#if OPENBSD_AF_INET6 != AF_INET6
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case OPENBSD_AF_INET6: /* XXX: read pcap files */
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#endif
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ip6_print(gndo, p, length);
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break;
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#endif
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default:
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/* address family not handled, print raw packet */
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if (!eflag)
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pflog_print(hdr);
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if (!suppress_default_print)
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default_print(p, caplen);
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}
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return (hdrlen);
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trunc:
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printf("[|pflog]");
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return (hdrlen);
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}
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/*
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* Local Variables:
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* c-style: whitesmith
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* c-basic-offset: 8
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* End:
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*/
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