X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/4bec97f457e593be925e92fa28d73af6a57d81cf..a8abce5c5e2dce2ba6dbccd5d3829da104b80f9c:/print-pflog.c diff --git a/print-pflog.c b/print-pflog.c index d0ac305c..7cd96b2e 100644 --- a/print-pflog.c +++ b/print-pflog.c @@ -1,5 +1,3 @@ -/* $OpenBSD: print-pflog.c,v 1.9 2001/09/18 14:52:53 jakob Exp $ */ - /* * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996 * The Regents of the University of California. All rights reserved. @@ -21,120 +19,161 @@ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ -#ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-pflog.c,v 1.7 2002-12-19 09:39:14 guy Exp $ (LBL)"; -#endif +/* \summary: OpenBSD packet filter log file printer */ #ifdef HAVE_CONFIG_H -#include "config.h" +#include #endif -#include - -#include -#include - -#include "interface.h" -#include "addrtoname.h" - -/* The header in OpenBSD pflog files. */ - -struct pfloghdr { - u_int32_t af; - char ifname[16]; - int16_t rnr; - u_int16_t reason; - u_int16_t action; - u_int16_t dir; -}; -#define PFLOG_HDRLEN sizeof(struct pfloghdr) - -/* Actions */ -#define PF_PASS 0 -#define PF_DROP 1 -#define PF_SCRUB 2 - -/* Directions */ -#define PF_IN 0 -#define PF_OUT 1 - -static struct tok pf_reasons[] = { - { 0, "match" }, - { 1, "bad-offset" }, - { 2, "fragment" }, - { 3, "short" }, - { 4, "normalize" }, - { 5, "memory" }, +#ifndef HAVE_NET_PFVAR_H +#error "No pf headers available" +#endif +#include +#include +#include +#include +#include + +#include "netdissect-stdinc.h" + +#include "netdissect.h" +#include "extract.h" + + +static const struct tok pf_reasons[] = { + { 0, "0(match)" }, + { 1, "1(bad-offset)" }, + { 2, "2(fragment)" }, + { 3, "3(short)" }, + { 4, "4(normalize)" }, + { 5, "5(memory)" }, + { 6, "6(bad-timestamp)" }, + { 7, "7(congestion)" }, + { 8, "8(ip-option)" }, + { 9, "9(proto-cksum)" }, + { 10, "10(state-mismatch)" }, + { 11, "11(state-insert)" }, + { 12, "12(state-limit)" }, + { 13, "13(src-limit)" }, + { 14, "14(synproxy)" }, { 0, NULL } }; -static struct tok pf_actions[] = { - { PF_PASS, "pass" }, - { PF_DROP, "drop" }, - { PF_SCRUB, "scrub" }, - { 0, NULL } +static const struct tok pf_actions[] = { + { PF_PASS, "pass" }, + { PF_DROP, "block" }, + { PF_SCRUB, "scrub" }, + { PF_NAT, "nat" }, + { PF_NONAT, "nat" }, + { PF_BINAT, "binat" }, + { PF_NOBINAT, "binat" }, + { PF_RDR, "rdr" }, + { PF_NORDR, "rdr" }, + { PF_SYNPROXY_DROP, "synproxy-drop" }, + { 0, NULL } }; -static struct tok pf_directions[] = { +static const struct tok pf_directions[] = { + { PF_INOUT, "in/out" }, { PF_IN, "in" }, { PF_OUT, "out" }, { 0, NULL } }; -#define OPENBSD_AF_INET 2 -#define OPENBSD_AF_INET6 24 +/* For reading capture files on other systems */ +#define OPENBSD_AF_INET 2 +#define OPENBSD_AF_INET6 24 static void -pflog_print(const struct pfloghdr *hdr) +pflog_print(netdissect_options *ndo, const struct pfloghdr *hdr) { - printf("rule %d/%s: %s %s on %s: ", - (short)ntohs(hdr->rnr), - tok2str(pf_reasons, "unkn(%u)", ntohs(hdr->reason)), - tok2str(pf_actions, "unkn(%u)", ntohs(hdr->action)), - tok2str(pf_directions, "unkn(%u)", ntohs(hdr->dir)), + uint32_t rulenr, subrulenr; + + ndo->ndo_protocol = "pflog"; + rulenr = EXTRACT_BE_U_4(&hdr->rulenr); + subrulenr = EXTRACT_BE_U_4(&hdr->subrulenr); + if (subrulenr == (uint32_t)-1) + ND_PRINT("rule %u/", rulenr); + else + ND_PRINT("rule %u.%s.%u/", rulenr, hdr->ruleset, subrulenr); + + ND_PRINT("%s: %s %s on %s: ", + tok2str(pf_reasons, "unkn(%u)", EXTRACT_U_1(&hdr->reason)), + tok2str(pf_actions, "unkn(%u)", EXTRACT_U_1(&hdr->action)), + tok2str(pf_directions, "unkn(%u)", EXTRACT_U_1(&hdr->dir)), hdr->ifname); } u_int -pflog_if_print(const struct pcap_pkthdr *h, register const u_char *p) +pflog_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, + const u_char *p) { u_int length = h->len; + u_int hdrlen; u_int caplen = h->caplen; const struct pfloghdr *hdr; - u_int8_t af; + uint8_t af; - if (caplen < PFLOG_HDRLEN) { - printf("[|pflog]"); + ndo->ndo_protocol = "pflog_if"; + /* check length */ + if (caplen < sizeof(uint8_t)) { + nd_print_trunc(ndo); return (caplen); } +#define MIN_PFLOG_HDRLEN 45 hdr = (const struct pfloghdr *)p; - if (eflag) - pflog_print(hdr); - af = ntohl(hdr->af); - length -= PFLOG_HDRLEN; - caplen -= PFLOG_HDRLEN; - p += PFLOG_HDRLEN; - switch (af) { + if (hdr->length < MIN_PFLOG_HDRLEN) { + ND_PRINT("[pflog: invalid header length!]"); + return (hdr->length); /* XXX: not really */ + } + hdrlen = BPF_WORDALIGN(hdr->length); - case OPENBSD_AF_INET: - ip_print(p, length); - break; + if (caplen < hdrlen) { + nd_print_trunc(ndo); + return (hdrlen); /* XXX: true? */ + } + + /* print what we know */ + ND_TCHECK_SIZE(hdr); + if (ndo->ndo_eflag) + pflog_print(ndo, hdr); + + /* skip to the real packet */ + af = EXTRACT_U_1(&hdr->af); + length -= hdrlen; + caplen -= hdrlen; + p += hdrlen; + switch (af) { -#ifdef INET6 - case OPENBSD_AF_INET6: - ip6_print(p, length); - break; + case AF_INET: +#if OPENBSD_AF_INET != AF_INET + case OPENBSD_AF_INET: /* XXX: read pcap files */ #endif + ip_print(ndo, p, length); + break; + +#if defined(AF_INET6) || defined(OPENBSD_AF_INET6) +#ifdef AF_INET6 + case AF_INET6: +#endif /* AF_INET6 */ +#if !defined(AF_INET6) || OPENBSD_AF_INET6 != AF_INET6 + case OPENBSD_AF_INET6: /* XXX: read pcap files */ +#endif /* !defined(AF_INET6) || OPENBSD_AF_INET6 != AF_INET6 */ + ip6_print(ndo, p, length); + break; +#endif /* defined(AF_INET6) || defined(OPENBSD_AF_INET6) */ default: /* address family not handled, print raw packet */ - if (!eflag) - pflog_print(hdr); - if (!xflag && !qflag) - default_print(p, caplen); + if (!ndo->ndo_eflag) + pflog_print(ndo, hdr); + if (!ndo->ndo_suppress_default_print) + ND_DEFAULTPRINT(p, caplen); } - return (PFLOG_HDRLEN); + return (hdrlen); +trunc: + nd_print_trunc(ndo); + return (hdrlen); }