OpenBSD-4.6/usr.sbin/tcpdump/print-pflog.c
/* $OpenBSD: print-pflog.c,v 1.19 2009/04/06 12:09:06 henning 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.
*/
#ifndef lint
static const char rcsid[] =
"@(#) $Id: print-pflog.c,v 1.19 2009/04/06 12:09:06 henning Exp $ (LBL)";
#endif
#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/mbuf.h>
#include <sys/proc.h>
#ifndef NO_PID
#define NO_PID (32766+1)
#endif
struct rtentry;
#include <net/if.h>
#include <net/if_pflog.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <net/pfvar.h>
#include <ctype.h>
#include <netdb.h>
#include <pcap.h>
#include <signal.h>
#include <stdio.h>
#include "interface.h"
#include "addrtoname.h"
char *pf_reasons[PFRES_MAX+2] = PFRES_NAMES;
void
pflog_if_print(u_char *user, 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 ip *ip;
#ifdef INET6
const struct ip6_hdr *ip6;
#endif
const struct pfloghdr *hdr;
u_int8_t af;
ts_print(&h->ts);
/* check length */
if (caplen < sizeof(u_int8_t)) {
printf("[|pflog]");
goto out;
}
#define MIN_PFLOG_HDRLEN 45
hdr = (struct pfloghdr *)p;
if (hdr->length < MIN_PFLOG_HDRLEN) {
printf("[pflog: invalid header length!]");
goto out;
}
hdrlen = BPF_WORDALIGN(hdr->length);
if (caplen < 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 = (struct pfloghdr *)p;
if (eflag) {
printf("rule ");
if (ntohl(hdr->rulenr) == (u_int32_t) -1)
printf("def");
else {
printf("%u", ntohl(hdr->rulenr));
if (hdr->ruleset[0]) {
printf(".%s", hdr->ruleset);
if (ntohl(hdr->subrulenr) == (u_int32_t) -1)
printf(".def");
else
printf(".%u", ntohl(hdr->subrulenr));
}
}
if (hdr->reason < PFRES_MAX)
printf("/(%s) ", pf_reasons[hdr->reason]);
else
printf("/(unkn %u) ", (unsigned)hdr->reason);
if (vflag)
printf("[uid %u, pid %u] ", (unsigned)hdr->rule_uid,
(unsigned)hdr->rule_pid);
switch (hdr->action) {
case PF_MATCH:
printf("match");
break;
case PF_SCRUB:
printf("scrub");
break;
case PF_PASS:
printf("pass");
break;
case PF_DROP:
printf("block");
break;
case PF_NAT:
case PF_NONAT:
printf("nat");
break;
case PF_BINAT:
case PF_NOBINAT:
printf("binat");
break;
case PF_RDR:
case PF_NORDR:
printf("rdr");
break;
}
printf(" %s on %s: ",
hdr->dir == PF_OUT ? "out" : "in",
hdr->ifname);
if (vflag && hdr->pid != NO_PID)
printf("[uid %u, pid %u] ", (unsigned)hdr->uid,
(unsigned)hdr->pid);
}
af = hdr->af;
length -= hdrlen;
if (af == AF_INET) {
ip = (struct ip *)(p + hdrlen);
ip_print((const u_char *)ip, length);
if (xflag)
default_print((const u_char *)ip,
caplen - hdrlen);
} else {
#ifdef INET6
ip6 = (struct ip6_hdr *)(p + hdrlen);
ip6_print((const u_char *)ip6, length);
if (xflag)
default_print((const u_char *)ip6,
caplen - hdrlen);
#endif
}
out:
putchar('\n');
}
void
pflog_old_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 ip *ip;
#ifdef INET6
const struct ip6_hdr *ip6;
#endif
const struct old_pfloghdr *hdr;
u_short res;
char reason[128], *why;
u_int8_t af;
ts_print(&h->ts);
if (caplen < OLD_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 = (struct old_pfloghdr *)p;
if (eflag) {
res = ntohs(hdr->reason);
why = (res < PFRES_MAX) ? pf_reasons[res] : "unkn";
snprintf(reason, sizeof(reason), "%d(%s)", res, why);
printf("rule %d/%s: ",
(short)ntohs(hdr->rnr), reason);
switch (ntohs(hdr->action)) {
case PF_MATCH:
printf("match");
break;
case PF_SCRUB:
printf("scrub");
break;
case PF_PASS:
printf("pass");
break;
case PF_DROP:
printf("block");
break;
case PF_NAT:
case PF_NONAT:
printf("nat");
break;
case PF_BINAT:
case PF_NOBINAT:
printf("binat");
break;
case PF_RDR:
case PF_NORDR:
printf("rdr");
break;
}
printf(" %s on %s: ",
ntohs(hdr->dir) == PF_OUT ? "out" : "in",
hdr->ifname);
}
af = ntohl(hdr->af);
length -= OLD_PFLOG_HDRLEN;
if (af == AF_INET) {
ip = (struct ip *)(p + OLD_PFLOG_HDRLEN);
ip_print((const u_char *)ip, length);
if (xflag)
default_print((const u_char *)ip,
caplen - OLD_PFLOG_HDRLEN);
} else {
#ifdef INET6
ip6 = (struct ip6_hdr *)(p + OLD_PFLOG_HDRLEN);
ip6_print((const u_char *)ip6, length);
if (xflag)
default_print((const u_char *)ip6,
caplen - OLD_PFLOG_HDRLEN);
#endif
}
out:
putchar('\n');
}