NetBSD/dist/tcpdump/print-pflog.c

168 lines
3.9 KiB
C

/* $NetBSD: print-pflog.c,v 1.4 2002/06/15 02:55:43 itojun Exp $ */
/* $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.
*
* 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static const char rcsid[] =
"@(#) Header: /tcpdump/master/tcpdump/print-pflog.c,v 1.2 2002/02/06 11:05:35 guy Exp (LBL)";
#else
__RCSID("$NetBSD: print-pflog.c,v 1.4 2002/06/15 02:55:43 itojun Exp $");
#endif
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.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" },
{ 0, NULL }
};
static struct tok pf_actions[] = {
{ PF_PASS, "pass" },
{ PF_DROP, "drop" },
{ PF_SCRUB, "scrub" },
{ 0, NULL }
};
static struct tok pf_directions[] = {
{ PF_IN, "in" },
{ PF_OUT, "out" },
{ 0, NULL }
};
#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)),
hdr->ifname);
}
void
pflog_if_print(u_char *user, const struct pcap_pkthdr *h,
register const u_char *p)
{
u_int length = h->len;
u_int caplen = h->caplen;
const struct pfloghdr *hdr;
u_int8_t af;
ts_print(&h->ts);
if (caplen < PFLOG_HDRLEN) {
printf("[|pflog]");
goto out;
}
/*
* Some printers want to get back at the link level addresses,
* and/or check that they're not walking off the end of the packet.
* Rather than pass them all the way down, we set these globals.
*/
packetp = p;
snapend = p + caplen;
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) {
case OPENBSD_AF_INET:
ip_print(p, length);
break;
#ifdef INET6
case OPENBSD_AF_INET6:
ip6_print(p, length);
break;
#endif
default:
/* address family not handled, print raw packet */
if (!eflag)
pflog_print(hdr);
if (!xflag && !qflag)
default_print(p, caplen);
}
if (xflag)
default_print(p, caplen);
out:
putchar('\n');
--infodelay;
if (infoprint)
info(0);
}