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 1.11 1999-10-30 05:11:11 itojun Exp $ (LBL)";
  24 #endif
  25
  26 #include <sys/param.h>
  27 #include <sys/time.h>
  28 #include <sys/socket.h>
  29
  30 #if __STDC__
  31 struct mbuf;
  32 struct rtentry;
  33 #endif
  34 #include <net/if.h>
  35
  36 #include <netinet/in.h>
  37 #include <netinet/if_ether.h>
  38 #include <netinet/in_systm.h>
  39 #include <netinet/ip.h>
  40 #include <netinet/ip_var.h>
  41 #include <netinet/udp.h>
  42 #include <netinet/udp_var.h>
  43 #include <netinet/tcp.h>
  44
  45 #include <stdio.h>
  46 #include <pcap.h>
  47
  48 #include "interface.h"
  49 #include "addrtoname.h"
  50 #include "ethertype.h"
  51
  52 /*
  53  * This is the top level routine of the printer.  'p' is the points
  54  * to the LLC/SNAP header of the packet, 'tvp' is the timestamp,
  55  * 'length' is the length of the packet off the wire, and 'caplen'
  56  * is the number of bytes actually captured.
  57  */
  58 void
  59 atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
  60 {
  61         u_int caplen = h->caplen;
  62         u_int length = h->len;
  63         u_short ethertype;
  64
  65         ts_print(&h->ts);
  66
  67         if (caplen < 8) {
  68                 printf("[|atm]");
  69                 goto out;
  70         }
  71         if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) {
  72                 /*XXX assume 802.6 MAC header from fore driver */
  73                 if (eflag)
  74                         printf("%04x%04x %04x%04x ",
  75                                p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3],
  76                                p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7],
  77                                p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11],
  78                                p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]);
  79                 p += 20;
  80                 length -= 20;
  81                 caplen -= 20;
  82         }
  83         ethertype = p[6] << 8 | p[7];
  84         if (eflag)
  85                 printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
  86                        p[0], p[1], p[2], /* dsap/ssap/ctrl */
  87                        p[3], p[4], p[5], /* manufacturer's code */
  88                        ethertype);
  89
  90         /*
  91          * Some printers want to get back at the ethernet addresses,
  92          * and/or check that they're not walking off the end of the packet.
  93          * Rather than pass them all the way down, we set these globals.
  94          */
  95         packetp = p;
  96         snapend = p + caplen;
  97
  98         length -= 8;
  99         caplen -= 8;
 100         p += 8;
 101
 102         switch (ethertype) {
 103
 104         case ETHERTYPE_IP:
 105                 ip_print(p, length);
 106                 break;
 107
 108 #ifdef INET6
 109         case ETHERTYPE_IPV6:
 110                 ip6_print(p, length);
 111                 break;
 112 #endif /*INET6*/
 113
 114                 /*XXX this probably isn't right */
 115         case ETHERTYPE_ARP:
 116         case ETHERTYPE_REVARP:
 117                 arp_print(p, length, caplen);
 118                 break;
 119 #ifdef notyet
 120         case ETHERTYPE_DN:
 121                 decnet_print(p, length, caplen);
 122                 break;
 123
 124         case ETHERTYPE_ATALK:
 125                 if (vflag)
 126                         fputs("et1 ", stdout);
 127                 atalk_print(p, length);
 128                 break;
 129
 130         case ETHERTYPE_AARP:
 131                 aarp_print(p, length);
 132                 break;
 133
 134         case ETHERTYPE_LAT:
 135         case ETHERTYPE_MOPRC:
 136         case ETHERTYPE_MOPDL:
 137                 /* default_print for now */
 138 #endif
 139         default:
 140                 /* ether_type not known, print raw packet */
 141                 if (!eflag)
 142                         printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
 143                                p[0], p[1], p[2], /* dsap/ssap/ctrl */
 144                                p[3], p[4], p[5], /* manufacturer's code */
 145                                ethertype);
 146                 if (!xflag && !qflag)
 147                         default_print(p, caplen);
 148         }
 149         if (xflag)
 150                 default_print(p, caplen);
 151  out:
 152         putchar('\n');
 153 }