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 1.21 2001-07-05 18:54:14 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 #include <netinet/in.h>
  35
  36 #include <stdio.h>
  37 #include <pcap.h>
  38
  39 #include "interface.h"
  40 #include "addrtoname.h"
  41 #include "ethertype.h"
  42
  43 /*
  44  * This is the top level routine of the printer.  'p' is the points
  45  * to the LLC/SNAP header of the packet, 'tvp' is the timestamp,
  46  * 'length' is the length of the packet off the wire, and 'caplen'
  47  * is the number of bytes actually captured.
  48  */
  49 void
  50 atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
  51 {
  52         u_int caplen = h->caplen;
  53         u_int length = h->len;
  54         u_short ethertype;
  55
  56         ++infodelay;
  57         ts_print(&h->ts);
  58
  59         if (caplen < 8) {
  60                 printf("[|atm]");
  61                 goto out;
  62         }
  63         if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) {
  64                 /*XXX assume 802.6 MAC header from fore driver */
  65                 if (eflag)
  66                         printf("%04x%04x %04x%04x ",
  67                                p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3],
  68                                p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7],
  69                                p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11],
  70                                p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]);
  71                 p += 20;
  72                 length -= 20;
  73                 caplen -= 20;
  74         }
  75         ethertype = p[6] << 8 | p[7];
  76         if (eflag)
  77                 printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
  78                        p[0], p[1], p[2], /* dsap/ssap/ctrl */
  79                        p[3], p[4], p[5], /* manufacturer's code */
  80                        ethertype);
  81
  82         /*
  83          * Some printers want to get back at the ethernet addresses,
  84          * and/or check that they're not walking off the end of the packet.
  85          * Rather than pass them all the way down, we set these globals.
  86          */
  87         packetp = p;
  88         snapend = p + caplen;
  89
  90         length -= 8;
  91         caplen -= 8;
  92         p += 8;
  93
  94         switch (ethertype) {
  95
  96         case ETHERTYPE_IP:
  97                 ip_print(p, length);
  98                 break;
  99
 100 #ifdef INET6
 101         case ETHERTYPE_IPV6:
 102                 ip6_print(p, length);
 103                 break;
 104 #endif /*INET6*/
 105
 106                 /*XXX this probably isn't right */
 107         case ETHERTYPE_ARP:
 108         case ETHERTYPE_REVARP:
 109                 arp_print(p, length, caplen);
 110                 break;
 111 #ifdef notyet
 112         case ETHERTYPE_DN:
 113                 decnet_print(p, length, caplen);
 114                 break;
 115
 116         case ETHERTYPE_ATALK:
 117                 if (vflag)
 118                         fputs("et1 ", stdout);
 119                 atalk_print(p, length);
 120                 break;
 121
 122         case ETHERTYPE_AARP:
 123                 aarp_print(p, length);
 124                 break;
 125
 126         case ETHERTYPE_LAT:
 127         case ETHERTYPE_MOPRC:
 128         case ETHERTYPE_MOPDL:
 129                 /* default_print for now */
 130 #endif
 131         default:
 132                 /* ether_type not known, print raw packet */
 133                 if (!eflag)
 134                         printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
 135                                packetp[0], packetp[1], packetp[2], /* dsap/ssap/ctrl */
 136                                packetp[3], packetp[4], packetp[5], /* manufacturer's code */
 137                                ethertype);
 138                 if (!xflag && !qflag)
 139                         default_print(p, caplen);
 140         }
 141         if (xflag)
 142                 default_print(p, caplen);
 143  out:
 144         putchar('\n');
 145         --infodelay;
 146         if (infoprint)
 147                 info(0);
 148 }