diff options
Diffstat (limited to 'contrib/tcpdump/print-pflog.c')
| -rw-r--r-- | contrib/tcpdump/print-pflog.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-pflog.c b/contrib/tcpdump/print-pflog.c new file mode 100644 index 0000000..972cb4b --- /dev/null +++ b/contrib/tcpdump/print-pflog.c @@ -0,0 +1,187 @@ +/* + * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996 + * 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: (1) source code distributions + * retain the above copyright notice and this paragraph in its entirety, (2) + * distributions including binary code include the above copyright notice and + * this paragraph in its entirety in the documentation or other materials + * provided with the distribution, and (3) all advertising materials mentioning + * features or use of this software display the following acknowledgement: + * ``This product includes software developed by the University of California, + * Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#ifndef lint +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 <sys/types.h> +#include <sys/socket.h> +#include <net/if.h> +#include <net/pfvar.h> +#include <net/if_pflog.h> + +#include <tcpdump-stdinc.h> + +#include <stdio.h> +#include <pcap.h> + +#include "interface.h" +#include "addrtoname.h" + +static 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, "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 } +}; + +/* 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) +{ + u_int32_t rulenr, subrulenr; + + rulenr = ntohl(hdr->rulenr); + subrulenr = ntohl(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); +} + +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; + + /* check length */ + if (caplen < sizeof(u_int8_t)) { + printf("[|pflog]"); + return (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); + + if (caplen < hdrlen) { + printf("[|pflog]"); + return (hdrlen); /* XXX: true? */ + } + + /* print what we know */ + hdr = (struct pfloghdr *)p; + TCHECK(*hdr); + if (eflag) + pflog_print(hdr); + + /* skip to the real packet */ + af = hdr->af; + length -= hdrlen; + caplen -= hdrlen; + p += hdrlen; + switch (af) { + + 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 AF_INET6: +#if OPENBSD_AF_INET6 != AF_INET6 + case OPENBSD_AF_INET6: /* XXX: read pcap files */ +#endif + ip6_print(p, length); + break; +#endif + + default: + /* address family not handled, print raw packet */ + if (!eflag) + pflog_print(hdr); + if (!suppress_default_print) + default_print(p, caplen); + } + + return (hdrlen); +trunc: + printf("[|pflog]"); + return (hdrlen); +} + +/* + * Local Variables: + * c-style: whitesmith + * c-basic-offset: 8 + * End: + */ |
