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

   1 /*
   2  * Copyright (c) 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 #ifndef lint
  22 static const char rcsid[] =
  23     "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.17 2000-09-28 06:42:55 guy Exp $ (LBL)";
  24 #endif
  25
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include <sys/param.h>
  31 #include <sys/time.h>
  32 #include <sys/socket.h>
  33
  34 struct mbuf;
  35 struct rtentry;
  36
  37 #include <netinet/in.h>
  38 #include <netinet/in_systm.h>
  39
  40 #include <stdio.h>
  41 #include <pcap.h>
  42
  43 #include "interface.h"
  44 #include "addrtoname.h"
  45 #include "ethertype.h"
  46
  47 /*
  48  * This is the top level routine of the printer.  'p' is the points
  49  * to the LLC/SNAP header of the packet, 'tvp' is the timestamp,
  50  * 'length' is the length of the packet off the wire, and 'caplen'
  51  * is the number of bytes actually captured.
  52  */
  53 void
  54 atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
  55 {
  56         u_int caplen = h->caplen;
  57         u_int length = h->len;
  58         u_short ethertype;
  59
  60         ts_print(&h->ts);
  61
  62         if (caplen < 8) {
  63                 printf("[|atm]");
  64                 goto out;
  65         }
  66         if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) {
  67                 /*XXX assume 802.6 MAC header from fore driver */
  68                 if (eflag)
  69                         printf("%04x%04x %04x%04x ",
  70                                p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3],
  71                                p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7],
  72                                p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11],
  73                                p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]);
  74                 p += 20;
  75                 length -= 20;
  76                 caplen -= 20;
  77         }
  78         ethertype = p[6] << 8 | p[7];
  79         if (eflag)
  80                 printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
  81                        p[0], p[1], p[2], /* dsap/ssap/ctrl */
  82                        p[3], p[4], p[5], /* manufacturer's code */
  83                        ethertype);
  84
  85         /*
  86          * Some printers want to get back at the ethernet addresses,
  87          * and/or check that they're not walking off the end of the packet.
  88          * Rather than pass them all the way down, we set these globals.
  89          */
  90         packetp = p;
  91         snapend = p + caplen;
  92
  93         length -= 8;
  94         caplen -= 8;
  95         p += 8;
  96
  97         switch (ethertype) {
  98
  99         case ETHERTYPE_IP:
 100                 ip_print(p, length);
 101                 break;
 102
 103 #ifdef INET6
 104         case ETHERTYPE_IPV6:
 105                 ip6_print(p, length);
 106                 break;
 107 #endif /*INET6*/
 108
 109                 /*XXX this probably isn't right */
 110         case ETHERTYPE_ARP:
 111         case ETHERTYPE_REVARP:
 112                 arp_print(p, length, caplen);
 113                 break;
 114 #ifdef notyet
 115         case ETHERTYPE_DN:
 116                 decnet_print(p, length, caplen);
 117                 break;
 118
 119         case ETHERTYPE_ATALK:
 120                 if (vflag)
 121                         fputs("et1 ", stdout);
 122                 atalk_print(p, length);
 123                 break;
 124
 125         case ETHERTYPE_AARP:
 126                 aarp_print(p, length);
 127                 break;
 128
 129         case ETHERTYPE_LAT:
 130         case ETHERTYPE_MOPRC:
 131         case ETHERTYPE_MOPDL:
 132                 /* default_print for now */
 133 #endif
 134         default:
 135                 /* ether_type not known, print raw packet */
 136                 if (!eflag)
 137                         printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
 138                                p[0], p[1], p[2], /* dsap/ssap/ctrl */
 139                                p[3], p[4], p[5], /* manufacturer's code */
 140                                ethertype);
 141                 if (!xflag && !qflag)
 142                         default_print(p, caplen);
 143         }
 144         if (xflag)
 145                 default_print(p, caplen);
 146  out:
 147         putchar('\n');
 148 }