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 1.1 2001-04-17 08:39:19 guy Exp $ (LBL)";
  26 #endif
  27
  28 #include <sys/param.h>
  29 #include <sys/time.h>
  30 #include <sys/socket.h>
  31
  32 struct mbuf;
  33 struct rtentry;
  34
  35 #include <netinet/in.h>
  36
  37 #include <stdio.h>
  38 #include <pcap.h>
  39
  40 #include "interface.h"
  41 #include "arcnet.h"
  42
  43 const u_char *packetp;
  44 const u_char *snapend;
  45
  46 int arcnet_encap_print(u_char arctype, const u_char *p,
  47     u_int length, u_int caplen);
  48
  49 struct arctype_map {
  50         const int arctype;
  51         char * const name;
  52 } arctypemap[] = {
  53         { ARCTYPE_IP_OLD,       "oldip" },
  54         { ARCTYPE_ARP_OLD,      "oldarp" },
  55         { ARCTYPE_IP,           "ip" },
  56         { ARCTYPE_ARP,          "arp" },
  57         { ARCTYPE_REVARP,       "rarp" },
  58         { ARCTYPE_ATALK,        "atalk" },
  59         { ARCTYPE_BANIAN,       "banyan" },
  60         { ARCTYPE_IPX,          "ipx" },
  61         { ARCTYPE_INET6,        "ipv6" },
  62         { ARCTYPE_DIAGNOSE,     "diag" },
  63         { 0, 0 }
  64 };
  65
  66 static inline void
  67 arcnet_print(const u_char *bp, u_int length, int phds, int flag, u_int seqid)
  68 {
  69         const struct arc_header *ap;
  70         struct arctype_map *atmp;
  71         char *arctypename;
  72         char typebuf[3];
  73
  74
  75         ap = (const struct arc_header *)bp;
  76
  77
  78         if (qflag) {
  79                 (void)printf("%02x %02x %d: ",
  80                              ap->arc_shost,
  81                              ap->arc_dhost,
  82                              length);
  83                 return;
  84         }
  85
  86         for (arctypename = NULL, atmp = arctypemap; atmp->arctype; atmp++) {
  87                 if (atmp->arctype == ap->arc_type) {
  88                         arctypename = atmp->name;
  89                         break;
  90                 }
  91         }
  92         if (!arctypename) {
  93                 arctypename = typebuf;
  94                 (void)snprintf(typebuf, sizeof(typebuf), "%02x", ap->arc_type);
  95         }
  96
  97         if (!phds) {
  98                 (void)printf("%02x %02x %s %d: ",
  99                              ap->arc_shost, ap->arc_dhost, arctypename,
 100                              length);
 101                              return;
 102         }
 103
 104         if (flag == 0) {
 105                 (void)printf("%02x %02x %s seqid %04x %d: ",
 106                         ap->arc_shost, ap->arc_dhost, arctypename, seqid,
 107                         length);
 108                         return;
 109         }
 110
 111         if (flag & 1)
 112                 (void)printf("%02x %02x %s seqid %04x "
 113                         "(first of %d fragments) %d: ",
 114                         ap->arc_shost, ap->arc_dhost, arctypename, seqid,
 115                         (flag + 3) / 2, length);
 116         else
 117                 (void)printf("%02x %02x %s seqid %04x "
 118                         "(fragment %d) %d: ",
 119                         ap->arc_shost, ap->arc_dhost, arctypename, seqid,
 120                         flag/2 + 1, length);
 121 }
 122
 123 /*
 124  * This is the top level routine of the printer.  'p' is the points
 125  * to the ether header of the packet, 'tvp' is the timestamp,
 126  * 'length' is the length of the packet off the wire, and 'caplen'
 127  * is the number of bytes actually captured.
 128  */
 129 void
 130 arcnet_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
 131 {
 132         u_int caplen = h->caplen;
 133         u_int length = h->len;
 134         struct arc_header *ap;
 135
 136         int phds, flag = 0, archdrlen;
 137         u_int seqid = 0;
 138         u_char arc_type;
 139
 140         ts_print(&h->ts);
 141
 142         if (caplen < ARC_HDRLEN) {
 143                 printf("[|arcnet]");
 144                 goto out;
 145         }
 146
 147         ap = (struct arc_header *)p;
 148         arc_type = ap->arc_type;
 149
 150         switch (arc_type) {
 151         default:
 152                 phds = 1;
 153                 break;
 154         case ARCTYPE_IP_OLD:
 155         case ARCTYPE_ARP_OLD:
 156         case ARCTYPE_DIAGNOSE:
 157                 phds = 0;
 158                 archdrlen = ARC_HDRLEN;
 159                 break;
 160         }
 161
 162         if (phds) {
 163                 if (caplen < ARC_HDRNEWLEN) {
 164                         arcnet_print(p, length, 0, 0, 0);
 165                         printf("[|phds]");
 166                         goto out;
 167                 }
 168
 169                 if (ap->arc_flag == 0xff) {
 170                         if (caplen < ARC_HDRNEWLEN_EXC) {
 171                                 arcnet_print(p, length, 0, 0, 0);
 172                                 printf("[|phds extended]");
 173                                 goto out;
 174                         }
 175                         flag = ap->arc_flag2;
 176                         seqid = ap->arc_seqid2;
 177                         archdrlen = ARC_HDRNEWLEN_EXC;
 178                 } else {
 179                         flag = ap->arc_flag;
 180                         seqid = ap->arc_seqid;
 181                         archdrlen = ARC_HDRNEWLEN;
 182                 }
 183         }
 184
 185
 186         if (eflag)
 187                 arcnet_print(p, length, phds, flag, seqid);
 188
 189         /*
 190          * Some printers want to get back at the ethernet addresses,
 191          * and/or check that they're not walking off the end of the packet.
 192          * Rather than pass them all the way down, we set these globals.
 193          */
 194         packetp = p;
 195         snapend = p + caplen;
 196
 197         length -= archdrlen;
 198         caplen -= archdrlen;
 199         p += archdrlen;
 200
 201         if (phds && flag && (flag & 1) == 0)
 202                 goto out2;
 203
 204         if (!arcnet_encap_print(arc_type, p, length, caplen)) {
 205                 default_print(p, caplen);
 206                 goto out;
 207         }
 208
 209  out2:
 210         if (xflag)
 211                 default_print(p, caplen);
 212
 213  out:
 214         putchar('\n');
 215 }
 216
 217 /*
 218  * Prints the packet encapsulated in an ARCnet data field,
 219  * given the ARCnet system code.
 220  *
 221  * Returns non-zero if it can do so, zero if the system code is unknown.
 222  */
 223
 224
 225 int
 226 arcnet_encap_print(u_char arctype, const u_char *p,
 227     u_int length, u_int caplen)
 228 {
 229         switch (arctype) {
 230
 231         case ARCTYPE_IP_OLD:
 232         case ARCTYPE_IP:
 233                 ip_print(p, length);
 234                 return (1);
 235
 236 #ifdef INET6
 237         case ARCTYPE_INET6:
 238                 ip6_print(p, length);
 239                 return (1);
 240 #endif /*INET6*/
 241
 242         case ARCTYPE_ARP_OLD:
 243         case ARCTYPE_ARP:
 244         case ARCTYPE_REVARP:
 245                 arp_print(p, length, caplen);
 246                 return (1);
 247
 248         case ARCTYPE_ATALK:     /* XXX was this ever used? */
 249                 if (vflag)
 250                         fputs("et1 ", stdout);
 251                 atalk_print(p, length);
 252                 return (1);
 253
 254         default:
 255                 return (0);
 256         }
 257 }