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 1.12 1999-11-21 09:36:48 fenner 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 #if __STDC__
  35 struct mbuf;
  36 struct rtentry;
  37 #endif
  38 #include <net/if.h>
  39
  40 #include <netinet/in.h>
  41 #include <netinet/if_ether.h>
  42 #include <netinet/in_systm.h>
  43 #include <netinet/ip.h>
  44 #include <netinet/ip_var.h>
  45 #include <netinet/udp.h>
  46 #include <netinet/udp_var.h>
  47 #include <netinet/tcp.h>
  48
  49 #include <stdio.h>
  50 #include <pcap.h>
  51
  52 #include "interface.h"
  53 #include "addrtoname.h"
  54 #include "ethertype.h"
  55
  56 /*
  57  * This is the top level routine of the printer.  'p' is the points
  58  * to the LLC/SNAP header of the packet, 'tvp' is the timestamp,
  59  * 'length' is the length of the packet off the wire, and 'caplen'
  60  * is the number of bytes actually captured.
  61  */
  62 void
  63 atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
  64 {
  65         u_int caplen = h->caplen;
  66         u_int length = h->len;
  67         u_short ethertype;
  68
  69         ts_print(&h->ts);
  70
  71         if (caplen < 8) {
  72                 printf("[|atm]");
  73                 goto out;
  74         }
  75         if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) {
  76                 /*XXX assume 802.6 MAC header from fore driver */
  77                 if (eflag)
  78                         printf("%04x%04x %04x%04x ",
  79                                p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3],
  80                                p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7],
  81                                p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11],
  82                                p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]);
  83                 p += 20;
  84                 length -= 20;
  85                 caplen -= 20;
  86         }
  87         ethertype = p[6] << 8 | p[7];
  88         if (eflag)
  89                 printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
  90                        p[0], p[1], p[2], /* dsap/ssap/ctrl */
  91                        p[3], p[4], p[5], /* manufacturer's code */
  92                        ethertype);
  93
  94         /*
  95          * Some printers want to get back at the ethernet addresses,
  96          * and/or check that they're not walking off the end of the packet.
  97          * Rather than pass them all the way down, we set these globals.
  98          */
  99         packetp = p;
 100         snapend = p + caplen;
 101
 102         length -= 8;
 103         caplen -= 8;
 104         p += 8;
 105
 106         switch (ethertype) {
 107
 108         case ETHERTYPE_IP:
 109                 ip_print(p, length);
 110                 break;
 111
 112 #ifdef INET6
 113         case ETHERTYPE_IPV6:
 114                 ip6_print(p, length);
 115                 break;
 116 #endif /*INET6*/
 117
 118                 /*XXX this probably isn't right */
 119         case ETHERTYPE_ARP:
 120         case ETHERTYPE_REVARP:
 121                 arp_print(p, length, caplen);
 122                 break;
 123 #ifdef notyet
 124         case ETHERTYPE_DN:
 125                 decnet_print(p, length, caplen);
 126                 break;
 127
 128         case ETHERTYPE_ATALK:
 129                 if (vflag)
 130                         fputs("et1 ", stdout);
 131                 atalk_print(p, length);
 132                 break;
 133
 134         case ETHERTYPE_AARP:
 135                 aarp_print(p, length);
 136                 break;
 137
 138         case ETHERTYPE_LAT:
 139         case ETHERTYPE_MOPRC:
 140         case ETHERTYPE_MOPDL:
 141                 /* default_print for now */
 142 #endif
 143         default:
 144                 /* ether_type not known, print raw packet */
 145                 if (!eflag)
 146                         printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
 147                                p[0], p[1], p[2], /* dsap/ssap/ctrl */
 148                                p[3], p[4], p[5], /* manufacturer's code */
 149                                ethertype);
 150                 if (!xflag && !qflag)
 151                         default_print(p, caplen);
 152         }
 153         if (xflag)
 154                 default_print(p, caplen);
 155  out:
 156         putchar('\n');
 157 }