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

   1 /*      $NetBSD: print-ah.c,v 1.4 1996/05/20 00:41:16 fvdl Exp $        */
   2
   3 /*
   4  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that: (1) source code distributions
   9  * retain the above copyright notice and this paragraph in its entirety, (2)
  10  * distributions including binary code include the above copyright notice and
  11  * this paragraph in its entirety in the documentation or other materials
  12  * provided with the distribution, and (3) all advertising materials mentioning
  13  * features or use of this software display the following acknowledgement:
  14  * ``This product includes software developed by the University of California,
  15  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  16  * the University nor the names of its contributors may be used to endorse
  17  * or promote products derived from this software without specific prior
  18  * written permission.
  19  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  20  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  22  */
  23
  24 #ifndef lint
  25 static char rcsid[] =
  26     "@(#) Header: print-ah.c,v 1.37 94/06/10 17:01:42 mccanne Exp (LBL)";
  27 #endif
  28
  29 #include <sys/param.h>
  30 #include <sys/time.h>
  31 #include <sys/types.h>
  32 #include <sys/socket.h>
  33
  34 #include <netinet/in.h>
  35 #include <netinet/in_systm.h>
  36 #include <netinet/ip.h>
  37 #include <netinet/ip_var.h>
  38 #include <netinet/udp.h>
  39 #include <netinet/udp_var.h>
  40
  41 #undef NOERROR                                  /* Solaris sucks */
  42 #include <arpa/nameser.h>
  43 #include <arpa/tftp.h>
  44
  45 #ifdef SOLARIS
  46 #include <tiuser.h>
  47 #endif
  48 #include <rpc/rpc.h>
  49
  50 #include <errno.h>
  51 #include <stdio.h>
  52
  53 #include "interface.h"
  54 #include "addrtoname.h"
  55
  56 extern int packettype;
  57
  58
  59 void
  60 esp_print(register const u_char *bp, int length, register const u_char *bp2)
  61 {
  62   register const struct ip *ip;
  63   register const u_char *cp, *nh;
  64   u_short ahlen, authlen;
  65   u_long  spi, seqno;
  66
  67   ip = (struct ip *)bp2;
  68
  69   (void)printf("ESP %s > %s\n\t\t",
  70                ipaddr_string(&ip->ip_src),
  71                ipaddr_string(&ip->ip_dst));
  72
  73   if (length < 8) {
  74     (void)printf(" [|esp] truncated-esp %d", length);
  75     return;
  76   }
  77
  78   spi        = ntohl(*((u_long *)(bp)));
  79   seqno      = ntohl(*((u_long *)(bp+4)));
  80
  81   nh         = bp+ahlen;
  82
  83   (void)printf("spi:%08x seqno:%d ciphertext: ", spi, seqno);
  84   (void)default_print_unaligned(bp+8, length-8);
  85
  86   /* XXX it would be nice to decrypt! */
  87 }