-/* $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.
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#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)";
-#endif
+/* \summary: OpenBSD packet filter log file printer */
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <tcpdump-stdinc.h>
-
-#include <stdio.h>
-#include <pcap.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" },
+#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 "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)),
- 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, IFNAMSIZ);
+ ND_PRINT(": ");
}
void
-pflog_if_print(u_char *user _U_, 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;
+
+ ndo->ndo_protocol = "pflog";
+ /* check length */
+ if (caplen < sizeof(uint8_t)) {
+ nd_print_trunc(ndo);
+ ndo->ndo_ll_hdr_len += h->caplen;
+ return;
+ }
- ts_print(&h->ts);
+#define MIN_PFLOG_HDRLEN 45
+ hdr = (const struct pfloghdr *)p;
+ 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 = BPF_WORDALIGN(hdr->length);
- if (caplen < PFLOG_HDRLEN) {
- printf("[|pflog]");
- goto out;
+ if (caplen < hdrlen) {
+ nd_print_trunc(ndo);
+ ndo->ndo_ll_hdr_len += hdrlen; /* XXX: true? */
+ return;
}
- /*
- * 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;
+ /* print what we know */
+ ND_TCHECK_SIZE(hdr);
+ if (ndo->ndo_eflag)
+ pflog_print(ndo, hdr);
- hdr = (const struct pfloghdr *)p;
- if (eflag)
- pflog_print(hdr);
- af = ntohl(hdr->af);
- length -= PFLOG_HDRLEN;
- caplen -= PFLOG_HDRLEN;
- p += PFLOG_HDRLEN;
+ /* skip to the real packet */
+ af = GET_U_1(&hdr->af);
+ length -= hdrlen;
+ caplen -= hdrlen;
+ p += hdrlen;
switch (af) {
- case OPENBSD_AF_INET:
- ip_print(p, length);
- break;
-
-#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);
}
- if (xflag)
- default_print(p, caplen);
-out:
- putchar('\n');
- --infodelay;
- if (infoprint)
- info(0);
+ ndo->ndo_ll_hdr_len += hdrlen;
+ return;
+trunc:
+ nd_print_trunc(ndo);
+ ndo->ndo_ll_hdr_len += hdrlen;
}
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