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 1.10 1999-10-17 21:37:11 mcr 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/udp.h>
  41 #include <netinet/tcp.h>
  42
  43 #include <stdio.h>
  44 #include <pcap.h>
  45
  46 #include "interface.h"
  47 #include "addrtoname.h"
  48 #include "ethertype.h"
  49
  50 /*
  51  * This is the top level routine of the printer.  'p' is the points
  52  * to the LLC/SNAP header of the packet, 'tvp' is the timestamp,
  53  * 'length' is the length of the packet off the wire, and 'caplen'
  54  * is the number of bytes actually captured.
  55  */
  56 void
  57 atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
  58 {
  59         u_int caplen = h->caplen;
  60         u_int length = h->len;
  61         u_short ethertype;
  62
  63         ts_print(&h->ts);
  64
  65         if (caplen < 8) {
  66                 printf("[|atm]");
  67                 goto out;
  68         }
  69         if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) {
  70                 /*XXX assume 802.6 MAC header from fore driver */
  71                 if (eflag)
  72                         printf("%04x%04x %04x%04x ",
  73                                p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3],
  74                                p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7],
  75                                p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11],
  76                                p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]);
  77                 p += 20;
  78                 length -= 20;
  79                 caplen -= 20;
  80         }
  81         ethertype = p[6] << 8 | p[7];
  82         if (eflag)
  83                 printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
  84                        p[0], p[1], p[2], /* dsap/ssap/ctrl */
  85                        p[3], p[4], p[5], /* manufacturer's code */
  86                        ethertype);
  87
  88         /*
  89          * Some printers want to get back at the ethernet addresses,
  90          * and/or check that they're not walking off the end of the packet.
  91          * Rather than pass them all the way down, we set these globals.
  92          */
  93         packetp = p;
  94         snapend = p + caplen;
  95
  96         length -= 8;
  97         caplen -= 8;
  98         p += 8;
  99
 100         switch (ethertype) {
 101
 102         case ETHERTYPE_IP:
 103                 ip_print(p, length);
 104                 break;
 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                                p[0], p[1], p[2], /* dsap/ssap/ctrl */
 136                                p[3], p[4], p[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 }