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/* $OpenBSD: print-null.c,v 1.12 2000/10/03 14:31:58 ho Exp $ */
/*
* Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997
* 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[] =
"@(#) $Header: /cvs/OpenBSD/src/usr.sbin/tcpdump/print-null.c,v 1.12 2000/10/03 14:31:58 ho Exp $ (LBL)";
#endif
#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#ifdef __STDC__
struct mbuf;
struct rtentry;
#endif
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#include <netinet/ip_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/tcp.h>
#include <pcap.h>
#include <stdio.h>
#include <string.h>
#ifdef INET6
#include <netinet/ip6.h>
#endif
#include "interface.h"
#include "addrtoname.h"
#ifndef AF_NS
#define AF_NS 6 /* XEROX NS protocols */
#endif
/*
* The DLT_NULL packet header is 4 bytes long. It contains a network
* order 32 bit integer that specifies the family, e.g. AF_INET
*/
#define NULL_HDRLEN 4
static void
null_print(const u_char *p, const struct ip *ip, u_int length)
{
u_int family;
memcpy((char *)&family, (char *)p, sizeof(family));
if (nflag) {
/* XXX just dump the header */
return;
}
switch (family) {
case AF_INET:
printf("ip: ");
break;
#ifdef INET6
case AF_INET6:
printf("ip6: ");
break;
#endif
case AF_NS:
printf("ns: ");
break;
default:
printf("AF %d: ", family);
break;
}
}
void
null_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
{
u_int length = h->len;
u_int caplen = h->caplen;
const struct ip *ip;
ts_print(&h->ts);
/*
* 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;
length -= NULL_HDRLEN;
ip = (struct ip *)(p + NULL_HDRLEN);
if (eflag)
null_print(p, ip, length);
#ifndef INET6
ip_print((const u_char *)ip, length);
#else
if (ip->ip_v == IPVERSION)
ip_print((const u_char *)ip, length);
else if (ip->ip_v == 6)
ip6_print((const u_char *)ip, length);
#endif /*INET6*/
if (xflag)
default_print((const u_char *)ip, caplen - NULL_HDRLEN);
putchar('\n');
}
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