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

   1 /*
   2  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 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  * From: NetBSD: print-arcnet.c,v 1.2 2000/04/24 13:02:28 itojun Exp
  22  */
  23 #ifndef lint
  24 static const char rcsid[] =
  25     "@(#) $Header: /tcpdump/master/tcpdump/print-arcnet.c,v 1.4 2001-07-05 18:54:14 guy Exp $ (LBL)";
  26 #endif
  27
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31
  32 #include <sys/param.h>
  33 #include <sys/time.h>
  34 #include <sys/socket.h>
  35
  36 struct mbuf;
  37 struct rtentry;
  38
  39 #include <netinet/in.h>
  40
  41 #include <stdio.h>
  42 #include <pcap.h>
  43
  44 #include "interface.h"
  45 #include "arcnet.h"
  46
  47 const u_char *packetp;
  48 const u_char *snapend;
  49
  50 int arcnet_encap_print(u_char arctype, const u_char *p,
  51     u_int length, u_int caplen);
  52
  53 struct arctype_map {
  54         const int arctype;
  55         char * const name;
  56 } arctypemap[] = {
  57         { ARCTYPE_IP_OLD,       "oldip" },
  58         { ARCTYPE_ARP_OLD,      "oldarp" },
  59         { ARCTYPE_IP,           "ip" },
  60         { ARCTYPE_ARP,          "arp" },
  61         { ARCTYPE_REVARP,       "rarp" },
  62         { ARCTYPE_ATALK,        "atalk" },
  63         { ARCTYPE_BANIAN,       "banyan" },
  64         { ARCTYPE_IPX,          "ipx" },
  65         { ARCTYPE_INET6,        "ipv6" },
  66         { ARCTYPE_DIAGNOSE,     "diag" },
  67         { 0, 0 }
  68 };
  69
  70 static inline void
  71 arcnet_print(const u_char *bp, u_int length, int phds, int flag, u_int seqid)
  72 {
  73         const struct arc_header *ap;
  74         struct arctype_map *atmp;
  75         char *arctypename;
  76         char typebuf[3];
  77
  78
  79         ap = (const struct arc_header *)bp;
  80
  81
  82         if (qflag) {
  83                 (void)printf("%02x %02x %d: ",
  84                              ap->arc_shost,
  85                              ap->arc_dhost,
  86                              length);
  87                 return;
  88         }
  89
  90         for (arctypename = NULL, atmp = arctypemap; atmp->arctype; atmp++) {
  91                 if (atmp->arctype == ap->arc_type) {
  92                         arctypename = atmp->name;
  93                         break;
  94                 }
  95         }
  96         if (!arctypename) {
  97                 arctypename = typebuf;
  98                 (void)snprintf(typebuf, sizeof(typebuf), "%02x", ap->arc_type);
  99         }
 100
 101         if (!phds) {
 102                 (void)printf("%02x %02x %s %d: ",
 103                              ap->arc_shost, ap->arc_dhost, arctypename,
 104                              length);
 105                              return;
 106         }
 107
 108         if (flag == 0) {
 109                 (void)printf("%02x %02x %s seqid %04x %d: ",
 110                         ap->arc_shost, ap->arc_dhost, arctypename, seqid,
 111                         length);
 112                         return;
 113         }
 114
 115         if (flag & 1)
 116                 (void)printf("%02x %02x %s seqid %04x "
 117                         "(first of %d fragments) %d: ",
 118                         ap->arc_shost, ap->arc_dhost, arctypename, seqid,
 119                         (flag + 3) / 2, length);
 120         else
 121                 (void)printf("%02x %02x %s seqid %04x "
 122                         "(fragment %d) %d: ",
 123                         ap->arc_shost, ap->arc_dhost, arctypename, seqid,
 124                         flag/2 + 1, length);
 125 }
 126
 127 /*
 128  * This is the top level routine of the printer.  'p' is the points
 129  * to the ether header of the packet, 'tvp' is the timestamp,
 130  * 'length' is the length of the packet off the wire, and 'caplen'
 131  * is the number of bytes actually captured.
 132  */
 133 void
 134 arcnet_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
 135 {
 136         u_int caplen = h->caplen;
 137         u_int length = h->len;
 138         struct arc_header *ap;
 139
 140         int phds, flag = 0, archdrlen = 0;
 141         u_int seqid = 0;
 142         u_char arc_type;
 143
 144         ++infodelay;
 145         ts_print(&h->ts);
 146
 147         if (caplen < ARC_HDRLEN) {
 148                 printf("[|arcnet]");
 149                 goto out;
 150         }
 151
 152         ap = (struct arc_header *)p;
 153         arc_type = ap->arc_type;
 154
 155         switch (arc_type) {
 156         default:
 157                 phds = 1;
 158                 break;
 159         case ARCTYPE_IP_OLD:
 160         case ARCTYPE_ARP_OLD:
 161         case ARCTYPE_DIAGNOSE:
 162                 phds = 0;
 163                 archdrlen = ARC_HDRLEN;
 164                 break;
 165         }
 166
 167         if (phds) {
 168                 if (caplen < ARC_HDRNEWLEN) {
 169                         arcnet_print(p, length, 0, 0, 0);
 170                         printf("[|phds]");
 171                         goto out;
 172                 }
 173
 174                 if (ap->arc_flag == 0xff) {
 175                         if (caplen < ARC_HDRNEWLEN_EXC) {
 176                                 arcnet_print(p, length, 0, 0, 0);
 177                                 printf("[|phds extended]");
 178                                 goto out;
 179                         }
 180                         flag = ap->arc_flag2;
 181                         seqid = ap->arc_seqid2;
 182                         archdrlen = ARC_HDRNEWLEN_EXC;
 183                 } else {
 184                         flag = ap->arc_flag;
 185                         seqid = ap->arc_seqid;
 186                         archdrlen = ARC_HDRNEWLEN;
 187                 }
 188         }
 189
 190
 191         if (eflag)
 192                 arcnet_print(p, length, phds, flag, seqid);
 193
 194         /*
 195          * Some printers want to get back at the ethernet addresses,
 196          * and/or check that they're not walking off the end of the packet.
 197          * Rather than pass them all the way down, we set these globals.
 198          */
 199         packetp = p;
 200         snapend = p + caplen;
 201
 202         length -= archdrlen;
 203         caplen -= archdrlen;
 204         p += archdrlen;
 205
 206         if (phds && flag && (flag & 1) == 0)
 207                 goto out2;
 208
 209         if (!arcnet_encap_print(arc_type, p, length, caplen)) {
 210                 default_print(p, caplen);
 211                 goto out;
 212         }
 213
 214  out2:
 215         if (xflag)
 216                 default_print(p, caplen);
 217
 218  out:
 219         putchar('\n');
 220         --infodelay;
 221         if (infoprint)
 222                 info(0);
 223 }
 224
 225 /*
 226  * Prints the packet encapsulated in an ARCnet data field,
 227  * given the ARCnet system code.
 228  *
 229  * Returns non-zero if it can do so, zero if the system code is unknown.
 230  */
 231
 232
 233 int
 234 arcnet_encap_print(u_char arctype, const u_char *p,
 235     u_int length, u_int caplen)
 236 {
 237         switch (arctype) {
 238
 239         case ARCTYPE_IP_OLD:
 240         case ARCTYPE_IP:
 241                 ip_print(p, length);
 242                 return (1);
 243
 244 #ifdef INET6
 245         case ARCTYPE_INET6:
 246                 ip6_print(p, length);
 247                 return (1);
 248 #endif /*INET6*/
 249
 250         case ARCTYPE_ARP_OLD:
 251         case ARCTYPE_ARP:
 252         case ARCTYPE_REVARP:
 253                 arp_print(p, length, caplen);
 254                 return (1);
 255
 256         case ARCTYPE_ATALK:     /* XXX was this ever used? */
 257                 if (vflag)
 258                         fputs("et1 ", stdout);
 259                 atalk_print(p, length);
 260                 return (1);
 261
 262         default:
 263                 return (0);
 264         }
 265 }