The Tcpdump Group git mirrors - tcpdump/blob - print-vjc.c

   1 /*
   2  * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that: (1) source code distributions
   7  * retain the above copyright notice and this paragraph in its entirety, (2)
   8  * distributions including binary code include the above copyright notice and
   9  * this paragraph in its entirety in the documentation or other materials
  10  * provided with the distribution, and (3) all advertising materials mentioning
  11  * features or use of this software display the following acknowledgement:
  12  * ``This product includes software developed by the University of California,
  13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  14  * the University nor the names of its contributors may be used to endorse
  15  * or promote products derived from this software without specific prior
  16  * written permission.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26
  27 #include <tcpdump-stdinc.h>
  28
  29 #include <pcap.h>
  30 #include <stdio.h>
  31
  32 #include "interface.h"
  33 #include "addrtoname.h"
  34
  35 #ifndef lint
  36 static const char rcsid[] _U_ =
  37     "@(#) $Header: /tcpdump/master/tcpdump/print-vjc.c,v 1.12 2003-11-15 00:39:43 guy Exp $ (LBL)";
  38 #endif
  39 #include "slcompress.h"
  40 #include "ppp.h"
  41
  42 int
  43 vjc_print(register const char *bp, u_short proto)
  44 {
  45         int i;
  46
  47         switch (bp[0] & 0xf0) {
  48         case TYPE_IP:
  49                 if (eflag)
  50                         printf("(vjc type=IP) ");
  51                 return PPP_IP;
  52         case TYPE_UNCOMPRESSED_TCP:
  53                 if (eflag)
  54                         printf("(vjc type=raw TCP) ");
  55                 return PPP_IP;
  56         case TYPE_COMPRESSED_TCP:
  57                 if (eflag)
  58                         printf("(vjc type=compressed TCP) ");
  59                 for (i = 0; i < 8; i++) {
  60                         if (bp[1] & (0x80 >> i))
  61                                 printf("%c", "?CI?SAWU"[i]);
  62                 }
  63                 if (bp[1])
  64                         printf(" ");
  65                 printf("C=0x%02x ", bp[2]);
  66                 printf("sum=0x%04x ", *(u_short *)&bp[3]);
  67                 return -1;
  68         case TYPE_ERROR:
  69                 if (eflag)
  70                         printf("(vjc type=error) ");
  71                 return -1;
  72         default:
  73                 if (eflag)
  74                         printf("(vjc type=0x%02x) ", bp[0] & 0xf0);
  75                 return -1;
  76         }
  77 }