Allow users to set a number on rules which will be exposed as part of the pflog header. The intent behind this is to allow users to correlate rules across updates (remember that pf rules continue to exist and match existing states, even if they're removed from the active ruleset) and pflog. Obtained from: pfSense MFC after: 3 weeks Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D32750
195 lines
5.0 KiB
C
195 lines
5.0 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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/* \summary: OpenBSD packet filter log file printer */
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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 <netdissect-stdinc.h>
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#include "netdissect.h"
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#include "extract.h"
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static const char tstr[] = "[|pflog]";
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static const 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 const 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 const 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(netdissect_options *ndo, const struct pfloghdr *hdr)
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{
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uint32_t rulenr, subrulenr, ridentifier;
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rulenr = EXTRACT_32BITS(&hdr->rulenr);
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subrulenr = EXTRACT_32BITS(&hdr->subrulenr);
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ridentifier = EXTRACT_32BITS(&hdr->ridentifier);
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if (subrulenr == (uint32_t)-1)
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ND_PRINT((ndo, "rule %u/", rulenr));
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else
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ND_PRINT((ndo, "rule %u.%s.%u/", rulenr, hdr->ruleset, subrulenr));
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ND_PRINT((ndo, "%s", tok2str(pf_reasons, "unkn(%u)", hdr->reason)));
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if (hdr->uid != UID_MAX)
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ND_PRINT((ndo, " [uid %u]", (unsigned)hdr->uid));
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if (ridentifier != 0)
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ND_PRINT((ndo, " [ridentifier %u]", ridentifier));
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ND_PRINT((ndo, ": %s %s on %s: ",
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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(netdissect_options *ndo, const struct pcap_pkthdr *h,
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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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uint8_t af;
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/* check length */
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if (caplen < sizeof(uint8_t)) {
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ND_PRINT((ndo, "%s", tstr));
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return (caplen);
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}
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#define MIN_PFLOG_HDRLEN 45
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hdr = (const struct pfloghdr *)p;
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if (hdr->length < MIN_PFLOG_HDRLEN) {
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ND_PRINT((ndo, "[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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ND_PRINT((ndo, "%s", tstr));
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return (hdrlen); /* XXX: true? */
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}
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/* print what we know */
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ND_TCHECK(*hdr);
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if (ndo->ndo_eflag)
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pflog_print(ndo, 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(ndo, p, length);
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break;
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#if defined(AF_INET6) || defined(OPENBSD_AF_INET6)
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#ifdef AF_INET6
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case AF_INET6:
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#endif /* AF_INET6 */
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#if !defined(AF_INET6) || OPENBSD_AF_INET6 != AF_INET6
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case OPENBSD_AF_INET6: /* XXX: read pcap files */
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#endif /* !defined(AF_INET6) || OPENBSD_AF_INET6 != AF_INET6 */
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ip6_print(ndo, p, length);
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break;
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#endif /* defined(AF_INET6) || defined(OPENBSD_AF_INET6) */
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default:
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/* address family not handled, print raw packet */
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if (!ndo->ndo_eflag)
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pflog_print(ndo, hdr);
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if (!ndo->ndo_suppress_default_print)
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ND_DEFAULTPRINT(p, caplen);
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}
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return (hdrlen);
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trunc:
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ND_PRINT((ndo, "%s", tstr));
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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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