X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/4bec97f457e593be925e92fa28d73af6a57d81cf..6d3b0e4599c5aa922bba42e53b038b51d9024a62:/print-pflog.c diff --git a/print-pflog.c b/print-pflog.c index d0ac305c..1cffbf6b 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 +19,188 @@ * 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: *BSD/Darwin 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" }, +#include "netdissect-stdinc.h" + +#include "netdissect.h" +#include "extract.h" +#include "af.h" + +#include "pflog.h" + +static const struct tok pf_reasons[] = { + { PFRES_MATCH, "0(match)" }, + { PFRES_BADOFF, "1(bad-offset)" }, + { PFRES_FRAG, "2(fragment)" }, + { PFRES_NORM, "3(short)" }, + { PFRES_NORM, "4(normalize)" }, + { PFRES_MEMORY, "5(memory)" }, + { PFRES_TS, "6(bad-timestamp)" }, + { PFRES_CONGEST, "7(congestion)" }, + { PFRES_IPOPTIONS, "8(ip-option)" }, + { PFRES_PROTCKSUM, "9(proto-cksum)" }, + { PFRES_BADSTATE, "10(state-mismatch)" }, + { PFRES_STATEINS, "11(state-insert)" }, + { PFRES_MAXSTATES, "12(state-limit)" }, + { PFRES_SRCLIMIT, "13(src-limit)" }, + { PFRES_SYNPROXY, "14(synproxy)" }, +#if defined(__FreeBSD__) + { PFRES_MAPFAILED, "15(map-failed)" }, +#elif defined(__NetBSD__) + { PFRES_STATELOCKED, "15(state-locked)" }, +#elif defined(__OpenBSD__) + { PFRES_TRANSLATE, "15(translate)" }, + { PFRES_NOROUTE, "16(no-route)" }, +#elif defined(__APPLE__) + { PFRES_DUMMYNET, "15(dummynet)" }, +#endif { 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, "nonat" }, + { PF_BINAT, "binat" }, + { PF_NOBINAT, "nobinat" }, + { PF_RDR, "rdr" }, + { PF_NORDR, "nordr" }, + { PF_SYNPROXY_DROP, "synproxy-drop" }, +#if defined(__FreeBSD__) + { PF_DEFER, "defer" }, +#elif defined(__OpenBSD__) + { PF_DEFER, "defer" }, + { PF_MATCH, "match" }, + { PF_DIVERT, "divert" }, + { PF_RT, "rt" }, + { PF_AFRT, "afrt" }, +#elif defined(__APPLE__) + { PF_DUMMYNET, "dummynet" }, + { PF_NODUMMYNET, "nodummynet" }, + { PF_NAT64, "nat64" }, + { PF_NONAT64, "nonat64" }, +#endif + { 0, NULL } }; -static struct tok pf_directions[] = { +static const struct tok pf_directions[] = { + { PF_INOUT, "in/out" }, { PF_IN, "in" }, { PF_OUT, "out" }, +#if defined(__OpenBSD__) + { PF_FWD, "fwd" }, +#endif { 0, NULL } }; -#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)), - hdr->ifname); + uint32_t rulenr, subrulenr; + + ndo->ndo_protocol = "pflog"; + rulenr = GET_BE_U_4(&hdr->rulenr); + subrulenr = GET_BE_U_4(&hdr->subrulenr); + if (subrulenr == (uint32_t)-1) + ND_PRINT("rule %u/", rulenr); + else { + ND_PRINT("rule %u.", rulenr); + nd_printjnp(ndo, (const u_char*)hdr->ruleset, PFLOG_RULESET_NAME_SIZE); + ND_PRINT(".%u/", subrulenr); + } + + ND_PRINT("%s: %s %s on ", + tok2str(pf_reasons, "unkn(%u)", GET_U_1(&hdr->reason)), + tok2str(pf_actions, "unkn(%u)", GET_U_1(&hdr->action)), + tok2str(pf_directions, "unkn(%u)", GET_U_1(&hdr->dir))); + nd_printjnp(ndo, (const u_char*)hdr->ifname, PFLOG_IFNAMSIZ); + ND_PRINT(": "); } -u_int -pflog_if_print(const struct pcap_pkthdr *h, register const u_char *p) +void +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; - - if (caplen < PFLOG_HDRLEN) { - printf("[|pflog]"); - return (caplen); + uint8_t af; + + ndo->ndo_protocol = "pflog"; + /* check length */ + if (caplen < sizeof(uint8_t)) { + nd_print_trunc(ndo); + ndo->ndo_ll_hdr_len += h->caplen; + return; } +#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 (GET_U_1(&hdr->length) < MIN_PFLOG_HDRLEN) { + ND_PRINT("[pflog: invalid header length!]"); + ndo->ndo_ll_hdr_len += GET_U_1(&hdr->length); /* XXX: not really */ + return; + } + hdrlen = roundup2(hdr->length, 4); - case OPENBSD_AF_INET: - ip_print(p, length); - break; + if (caplen < hdrlen) { + nd_print_trunc(ndo); + ndo->ndo_ll_hdr_len += hdrlen; /* XXX: true? */ + return; + } -#ifdef INET6 - case OPENBSD_AF_INET6: - ip6_print(p, length); - break; -#endif + /* print what we know */ + ND_TCHECK_SIZE(hdr); + if (ndo->ndo_eflag) + pflog_print(ndo, hdr); + + /* skip to the real packet */ + af = GET_U_1(&hdr->af); + length -= hdrlen; + caplen -= hdrlen; + p += hdrlen; + switch (af) { + + /* + * If there's a system that doesn't use the AF_INET + * from 4.2BSD, feel free to add its value to af.h + * and use it here. + * + * Hopefully, there isn't. + */ + case BSD_AFNUM_INET: + ip_print(ndo, p, length); + break; + + /* + * Try all AF_INET6 values for all systems with pflog, + * including Darwin. + */ + case BSD_AFNUM_INET6_BSD: + case BSD_AFNUM_INET6_FREEBSD: + case BSD_AFNUM_INET6_DARWIN: + ip6_print(ndo, p, length); + break; 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); + ndo->ndo_ll_hdr_len += hdrlen; + return; +trunc: + nd_print_trunc(ndo); + ndo->ndo_ll_hdr_len += hdrlen; }