X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/e070cf232ffadbdbbca68b132ef369675890e566..refs/heads/tcpdump-4.1:/print-pflog.c diff --git a/print-pflog.c b/print-pflog.c index f122a5a3..ac325f4b 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. @@ -22,135 +20,169 @@ */ #ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-pflog.c,v 1.5 2002-12-18 08:53:22 guy Exp $ (LBL)"; +static const char rcsid[] _U_ = + "@(#) $Header: /tcpdump/master/tcpdump/print-pflog.c,v 1.16 2007-09-12 19:36:18 guy Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif +#ifndef HAVE_NET_PFVAR_H +#error "No pf headers available" +#endif +#include +#include +#include +#include +#include + #include #include #include +#include "extract.h" #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" }, + { 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 } + { 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[] = { + { 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) { - 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)), + u_int32_t rulenr, subrulenr; + + rulenr = EXTRACT_32BITS(&hdr->rulenr); + subrulenr = EXTRACT_32BITS(&hdr->subrulenr); + if (subrulenr == (u_int32_t)-1) + printf("rule %u/", rulenr); + else + printf("rule %u.%s.%u/", rulenr, hdr->ruleset, subrulenr); + + printf("%s: %s %s on %s: ", + tok2str(pf_reasons, "unkn(%u)", hdr->reason), + tok2str(pf_actions, "unkn(%u)", hdr->action), + tok2str(pf_directions, "unkn(%u)", hdr->dir), hdr->ifname); } -void -pflog_if_print(u_char *user _U_, const struct pcap_pkthdr *h, - register const u_char *p) +u_int +pflog_if_print(const struct pcap_pkthdr *h, register 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; - ts_print(&h->ts); - - if (caplen < PFLOG_HDRLEN) { + /* check length */ + if (caplen < sizeof(u_int8_t)) { printf("[|pflog]"); - goto out; + return (caplen); } - /* - * Some printers want to check that they're not walking off the - * end of the packet. - * Rather than pass it all the way down, we set this global. - */ - snapend = p + caplen; +#define MIN_PFLOG_HDRLEN 45 + hdr = (struct pfloghdr *)p; + if (hdr->length < MIN_PFLOG_HDRLEN) { + printf("[pflog: invalid header length!]"); + return (hdr->length); /* XXX: not really */ + } + hdrlen = BPF_WORDALIGN(hdr->length); - hdr = (const struct pfloghdr *)p; + if (caplen < hdrlen) { + printf("[|pflog]"); + return (hdrlen); /* XXX: true? */ + } + + /* print what we know */ + hdr = (struct pfloghdr *)p; + TCHECK(*hdr); if (eflag) pflog_print(hdr); - af = ntohl(hdr->af); - length -= PFLOG_HDRLEN; - caplen -= PFLOG_HDRLEN; - p += PFLOG_HDRLEN; + + /* skip to the real packet */ + af = hdr->af; + length -= hdrlen; + caplen -= hdrlen; + p += hdrlen; switch (af) { - case OPENBSD_AF_INET: - ip_print(p, length); - break; + case AF_INET: +#if OPENBSD_AF_INET != AF_INET + case OPENBSD_AF_INET: /* XXX: read pcap files */ +#endif + ip_print(gndo, p, length); + break; #ifdef INET6 - case OPENBSD_AF_INET6: - ip6_print(p, length); - break; + case AF_INET6: +#if OPENBSD_AF_INET6 != AF_INET6 + case OPENBSD_AF_INET6: /* XXX: read pcap files */ +#endif + ip6_print(gndo, p, length); + break; #endif default: /* address family not handled, print raw packet */ if (!eflag) pflog_print(hdr); - if (!xflag && !qflag) + if (!suppress_default_print) default_print(p, caplen); } - - if (xflag) - default_print(p, caplen); -out: - putchar('\n'); - --infodelay; - if (infoprint) - info(0); + + return (hdrlen); +trunc: + printf("[|pflog]"); + return (hdrlen); } + +/* + * Local Variables: + * c-style: whitesmith + * c-basic-offset: 8 + * End: + */