Add tcpdump and tcpslice source code to /usr/src/contrib

[unix-history] / usr / src / contrib / tcpdump / tcpdump / print-ppp.c

/*
* 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.
*/

#ifndef lint
static  char rcsid[] =
       "@(#)$Header: print-ppp.c,v 1.7 91/10/07 20:18:33 leres Exp $ (LBL)";
#endif

#ifdef PPP
#include <stdio.h>
#include <netdb.h>
#include <ctype.h>
#include <signal.h>
#include <errno.h>
#include <sys/param.h>
#include <sys/types.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 <net/bpf.h>

#include "interface.h"
#include "addrtoname.h"

/* XXX This goes somewhere else. */
#define PPP_HDRLEN 4

void
ppp_if_print(p, tvp, length, caplen)
       u_char *p;
       struct timeval *tvp;
       int length;
       int caplen;
{
       struct ip *ip;

       ts_print(tvp);

       if (caplen < PPP_HDRLEN) {
               printf("[|ppp]");
               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 = (u_char *)p;
       snapend = (u_char *)p + caplen;

       if (eflag)
               printf("%c %4d %02x %04x: ", p[0] ? 'O' : 'I', length,
                      p[1], ntohs(*(u_short *)&p[2]));

       length -= PPP_HDRLEN;
       ip = (struct ip *)(p + PPP_HDRLEN);
       ip_print(ip, length);

       if (xflag)
               default_print((u_short *)ip, caplen - PPP_HDRLEN);
out:
       putchar('\n');
}
#else
#include <stdio.h>
void
ppp_if_print()
{
       void error();

       error("not configured for ppp");
       /* NOTREACHED */
}
#endif