NetBSD/usr.sbin/tcpdump/print-null.c

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/*
* Copyright (c) 1990 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.
*
* $Id: print-null.c,v 1.1 1993/11/14 21:20:47 deraadt Exp $
*/
#ifndef lint
static char rcsid[] =
"@(#) Header: print-null.c,v 1.3 91/10/07 20:19:11 leres Exp (LBL)";
#endif
#include <stdio.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/timeb.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/mbuf.h>
#include <sys/ioctl.h>
#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 <netinet/tcpip.h>
#include <net/bpf.h>
#include "interface.h"
#include "addrtoname.h"
#define NULL_HDRLEN 4
static void
null_print(p, ip, length)
u_char *p;
struct ip *ip;
int length;
{
u_int family;
bcopy(p, &family, sizeof(family));
if (nflag) {
/* XXX just dump the header */
return;
}
switch (family) {
case AF_INET:
printf("ip: ");
break;
case AF_NS:
printf("ns: ");
break;
default:
printf("AF %d: ", family);
break;
}
}
void
null_if_print(p, tvp, length, caplen)
u_char *p;
struct timeval *tvp;
int length;
int caplen;
{
struct ip *ip;
ts_print(tvp);
/*
* 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 = (u_char *)p;
snapend = (u_char *)p + caplen;
length -= NULL_HDRLEN;
ip = (struct ip *)(p + NULL_HDRLEN);
if (eflag)
null_print(p, ip, length);
ip_print(ip, length);
if (xflag)
default_print((u_short *)ip, caplen - NULL_HDRLEN);
putchar('\n');
}