packet-eigrp.c

   1 /* packet-eigrp.c
   2  * Routines for EIGRP dissection
   3  * Copyright 2000, Paul Ionescu <paul@acorp.ro>
   4  *
   5  * $Id: packet-eigrp.c,v 1.9 2000/11/19 08:53:56 guy Exp $
   6  *
   7  * Ethereal - Network traffic analyzer
   8  * By Gerald Combs <gerald@zing.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  25  */
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #ifdef HAVE_SYS_TYPES_H
  32 # include <sys/types.h>
  33 #endif
  34
  35 #ifdef HAVE_NETINET_IN_H
  36 # include <netinet/in.h>
  37 #endif
  38
  39 #include <glib.h>
  40 #include "packet.h"
  41 #include "resolv.h"
  42
  43 #include "packet-atalk.h"
  44 #include "packet-ip.h"
  45 #include "packet-ipx.h"
  46
  47 #define EIGRP_UPDATE    0x01
  48 #define EIGRP_REQUEST   0x02
  49 #define EIGRP_QUERY     0x03
  50 #define EIGRP_REPLY     0x04
  51 #define EIGRP_HELLO     0x05
  52 #define EIGRP_SAP       0x06
  53 #define EIGRP_HI        0x20  /* This value is for my own need to make a difference between Hello and Ack */
  54 #define EIGRP_ACK       0x40  /* This value is for my own need to make a difference between Hello and Ack */
  55
  56 #define TLV_PAR         0x0001
  57 #define TLV_SEQ         0x0003
  58 #define TLV_SV          0x0004
  59 #define TLV_NMS         0x0005
  60 #define TLV_IP_INT      0x0102
  61 #define TLV_IP_EXT      0x0103
  62 #define TLV_AT_INT      0x0202
  63 #define TLV_AT_EXT      0x0203
  64 #define TLV_AT_CBL      0x0204
  65 #define TLV_IPX_INT     0x0302
  66 #define TLV_IPX_EXT     0x0303
  67
  68 #define EIGRP_HEADER_LENGTH     20
  69
  70 static gint proto_eigrp = -1;
  71
  72 static gint hf_eigrp_opcode = -1;
  73 static gint hf_eigrp_as = -1;
  74 static gint hf_eigrp_tlv = -1;
  75
  76 static gint ett_eigrp = -1;
  77 static gint ett_tlv = -1;
  78
  79 static const value_string eigrp_opcode_vals[] = {
  80         { EIGRP_HELLO,          "Hello/Ack" },
  81         { EIGRP_UPDATE,         "Update" },
  82         { EIGRP_REPLY,          "Reply" },
  83         { EIGRP_QUERY,          "Query" },
  84         { EIGRP_REQUEST,        "Request" },
  85         { EIGRP_SAP,            "IPX/SAP Update" },
  86         { EIGRP_HI,             "Hello" },
  87         { EIGRP_ACK,            "Acknowledge" },
  88         { 0,                            NULL }
  89 };
  90
  91 static const value_string eigrp_tlv_vals[] = {
  92         { TLV_PAR,     "EIGRP Parameters"},
  93         { TLV_SEQ ,    "Sequence"},
  94         { TLV_SV,      "Software Version"},
  95         { TLV_NMS   ,  "Next multicast sequence"},
  96         { TLV_IP_INT,  "IP internal route"},
  97         { TLV_IP_EXT,  "IP external route"},
  98         { TLV_AT_INT,  "AppleTalk internal route"},
  99         { TLV_AT_EXT,  "AppleTalk external route"},
 100         { TLV_AT_CBL,  "AppleTalk cable configuration"},
 101         { TLV_IPX_INT, "IPX internal route"},
 102         { TLV_IPX_EXT, "IPX external route"},
 103         { 0,            NULL}
 104 };
 105
 106 static const value_string eigrp_pid_vals[] = {
 107         { 1,    "IGRP"},
 108         { 2,    "EIGRP"},
 109         { 3,    "Static Route"},
 110         { 4,    "RIP"},
 111         { 5,    "Hello"},
 112         { 6,    "OSPF"},
 113         { 7,    "IS-IS"},
 114         { 8,    "EGP"},
 115         { 9,    "BGP"},
 116         { 10,   "IDRP"},
 117         { 11,   "Connected link"},
 118         { 0,    NULL}
 119 };
 120
 121
 122 static void dissect_eigrp_par (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
 123 static void dissect_eigrp_seq (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
 124 static void dissect_eigrp_sv  (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
 125 static void dissect_eigrp_nms (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
 126
 127 static void dissect_eigrp_ip_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
 128 static void dissect_eigrp_ip_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
 129
 130 static void dissect_eigrp_ipx_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
 131 static void dissect_eigrp_ipx_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
 132
 133 static void dissect_eigrp_at_cbl (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
 134 static void dissect_eigrp_at_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
 135 static void dissect_eigrp_at_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
 136
 137 static void
 138 dissect_eigrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
 139
 140   proto_tree *eigrp_tree,*tlv_tree;
 141   proto_item *ti;
 142   tvbuff_t   *next_tvb;
 143
 144   guint opcode,opcode_tmp;
 145   guint16 tlv,size, offset = EIGRP_HEADER_LENGTH;
 146   guint32 ack;
 147
 148   CHECK_DISPLAY_AS_DATA(proto_eigrp, tvb, pinfo, tree);
 149
 150   pinfo->current_proto = "EIGRP";
 151
 152   opcode_tmp=opcode=tvb_get_guint8(tvb,1);
 153   ack = tvb_get_ntohl(tvb,12);
 154   if (opcode==EIGRP_HELLO) { if (ack == 0) opcode_tmp=EIGRP_HI; else opcode_tmp=EIGRP_ACK; }
 155
 156   if (check_col(pinfo->fd, COL_PROTOCOL))
 157     col_set_str(pinfo->fd, COL_PROTOCOL, "EIGRP");
 158   if (check_col(pinfo->fd, COL_INFO))
 159     col_add_str(pinfo->fd, COL_INFO,
 160         val_to_str(opcode_tmp , eigrp_opcode_vals, "Unknown (0x%04x)"));
 161
 162
 163
 164
 165   if (tree) {
 166
 167      ti = proto_tree_add_protocol_format(tree, proto_eigrp, tvb, 0,
 168               tvb_length(tvb), "Cisco EIGRP ");
 169
 170      eigrp_tree = proto_item_add_subtree(ti, ett_eigrp);
 171
 172      proto_tree_add_text (eigrp_tree, tvb, 0,1,"Version    = %u",tvb_get_guint8(tvb,0)) ;
 173      proto_tree_add_uint_format (eigrp_tree, hf_eigrp_opcode, tvb, 1,1,opcode,"Opcode = %u (%s)",opcode,val_to_str(opcode_tmp,eigrp_opcode_vals, "Unknown")) ;
 174      proto_tree_add_text (eigrp_tree, tvb, 2,2,"Checksum   = 0x%04x",tvb_get_ntohs(tvb,2)) ;
 175      proto_tree_add_text (eigrp_tree, tvb, 4,4,"Flags      = 0x%08x",tvb_get_ntohl(tvb,4)) ;
 176      proto_tree_add_text (eigrp_tree, tvb, 8,4,"Sequence   = %u",tvb_get_ntohl(tvb,8)) ;
 177      proto_tree_add_text (eigrp_tree, tvb, 12,4,"Acknowledge  = %u",tvb_get_ntohl(tvb,12)) ;
 178      proto_tree_add_uint (eigrp_tree, hf_eigrp_as, tvb, 16,4,tvb_get_ntohl(tvb,16)) ;
 179
 180      while ( tvb_length_remaining(tvb,offset)>0 ) {
 181
 182              tlv = tvb_get_ntohs(tvb,offset);
 183              size =  tvb_get_ntohs(tvb,offset+2);
 184
 185              ti = proto_tree_add_notext (eigrp_tree, tvb, offset,size);
 186
 187              tlv_tree = proto_item_add_subtree (ti, ett_tlv);
 188              proto_tree_add_uint_format (tlv_tree,hf_eigrp_tlv, tvb,offset,2,tlv,"Type = 0x%04x (%s)",tlv,val_to_str(tlv,eigrp_tlv_vals, "Unknown")) ;
 189              proto_tree_add_text (tlv_tree,tvb,offset+2,2,"Size = %u bytes",size) ;
 190
 191              next_tvb = tvb_new_subset(tvb, offset+4, size-4, -1);
 192
 193              switch (tlv){
 194                 case TLV_PAR:
 195                         dissect_eigrp_par(next_tvb, tlv_tree, ti);
 196                         break;
 197                 case TLV_SEQ:
 198                         dissect_eigrp_seq(next_tvb, tlv_tree, ti);
 199                         break;
 200                 case TLV_SV:
 201                         dissect_eigrp_sv(next_tvb, tlv_tree, ti);
 202                         break;
 203                 case TLV_NMS:
 204                         dissect_eigrp_nms(next_tvb, tlv_tree, ti);
 205                         break;
 206
 207                 case TLV_IP_INT:
 208                         dissect_eigrp_ip_int(next_tvb, tlv_tree, ti);
 209                         break;
 210                 case TLV_IP_EXT:
 211                         dissect_eigrp_ip_ext(next_tvb, tlv_tree, ti);
 212                         break;
 213
 214                 case TLV_IPX_INT:
 215                         dissect_eigrp_ipx_int(next_tvb, tlv_tree, ti);
 216                         break;
 217                 case TLV_IPX_EXT:
 218                         dissect_eigrp_ipx_ext(next_tvb, tlv_tree, ti);
 219                         break;
 220
 221                 case TLV_AT_CBL:
 222                         dissect_eigrp_at_cbl(next_tvb, tlv_tree, ti);
 223                         break;
 224                 case TLV_AT_INT:
 225                         dissect_eigrp_at_int(next_tvb, tlv_tree, ti);
 226                         break;
 227                 case TLV_AT_EXT:
 228                         dissect_eigrp_at_ext(next_tvb, tlv_tree, ti);
 229                         break;
 230
 231                 default:
 232                         proto_item_set_text(ti,"Unknown TLV   (0x%04x)",tlv) ;
 233                 };
 234
 235              offset+=size;
 236      }
 237
 238    }
 239 }
 240
 241
 242
 243 static void dissect_eigrp_par (tvbuff_t *tvb, proto_tree *tree, proto_item *ti) {
 244         proto_tree_add_text (tree,tvb,0,1,"K1 = %u",tvb_get_guint8(tvb,0));
 245         proto_tree_add_text (tree,tvb,1,1,"K2 = %u",tvb_get_guint8(tvb,1));
 246         proto_tree_add_text (tree,tvb,2,1,"K3 = %u",tvb_get_guint8(tvb,2));
 247         proto_tree_add_text (tree,tvb,3,1,"K4 = %u",tvb_get_guint8(tvb,3));
 248         proto_tree_add_text (tree,tvb,4,1,"K5 = %u",tvb_get_guint8(tvb,4));
 249         proto_tree_add_text (tree,tvb,5,1,"Rezerved");
 250         proto_tree_add_text (tree,tvb,6,2,"Hold Time = %u",tvb_get_ntohs(tvb,6));
 251         proto_item_set_text (ti,"%s",match_strval(TLV_PAR,eigrp_tlv_vals));
 252
 253 }
 254
 255 static void dissect_eigrp_seq (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
 256 {       guint8 addr_len;
 257         addr_len=tvb_get_guint8(tvb,0);
 258         proto_tree_add_text (tree,tvb,0,1,"Address length = %u",addr_len);
 259         switch (addr_len){
 260                 case 4:
 261                         proto_tree_add_text (tree,tvb,1,addr_len,"IP Address = %u.%u.%u.%u",tvb_get_guint8(tvb,1),tvb_get_guint8(tvb,2),tvb_get_guint8(tvb,3),tvb_get_guint8(tvb,4));
 262                         break;
 263                 case 10:
 264                         proto_tree_add_text (tree,tvb,1,addr_len,"IPX Address = %08x.%04x.%04x.%04x",tvb_get_ntohl(tvb,1),tvb_get_ntohs(tvb,5),tvb_get_ntohs(tvb,7),tvb_get_ntohs(tvb,9));
 265                         break;
 266                 default:
 267                         /* nothing */
 268                         ;
 269                 }
 270         proto_item_set_text (ti,"%s",match_strval(TLV_SEQ,eigrp_tlv_vals));
 271
 272 }
 273
 274 static void dissect_eigrp_sv (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
 275 {
 276         proto_tree_add_text (tree,tvb,0,2," IOS  release version = %u.%u",tvb_get_guint8(tvb,0),tvb_get_guint8(tvb,1));
 277         proto_tree_add_text (tree,tvb,2,2,"EIGRP release version = %u.%u",tvb_get_guint8(tvb,2),tvb_get_guint8(tvb,3));
 278         proto_item_set_text (ti,"%s : IOS=%u.%u, EIGRP=%u.%u ",match_strval(TLV_SV,eigrp_tlv_vals),tvb_get_guint8(tvb,0),tvb_get_guint8(tvb,1),tvb_get_guint8(tvb,2),tvb_get_guint8(tvb,3));
 279
 280 }
 281
 282 static void dissect_eigrp_nms (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
 283 {
 284         proto_tree_add_text (tree,tvb,0,4,"Next Multicast Sequence = %u",tvb_get_ntohl(tvb,0));
 285         proto_item_set_text (ti,"%s : %u",match_strval(TLV_NMS,eigrp_tlv_vals),tvb_get_ntohl(tvb,0));
 286 }
 287
 288
 289
 290 static void dissect_eigrp_ip_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
 291 {
 292         guint8 ip_addr[4],length,addr_len;
 293         tvb_memcpy(tvb,ip_addr,0,4);
 294         proto_tree_add_text (tree,tvb,0,4, "Next Hop    = %s",ip_to_str(ip_addr));
 295         proto_tree_add_text (tree,tvb,4,4, "Delay       = %u",tvb_get_ntohl(tvb,4));
 296         proto_tree_add_text (tree,tvb,8,4, "Bandwidth   = %u",tvb_get_ntohl(tvb,8));
 297         proto_tree_add_text (tree,tvb,12,3,"MTU         = %u",tvb_get_ntoh24(tvb,12));
 298         proto_tree_add_text (tree,tvb,15,1,"Hop Count   = %u",tvb_get_guint8(tvb,15));
 299         proto_tree_add_text (tree,tvb,16,1,"Reliability = %u",tvb_get_guint8(tvb,16));
 300         proto_tree_add_text (tree,tvb,17,1,"Load        = %u",tvb_get_guint8(tvb,17));
 301         proto_tree_add_text (tree,tvb,18,2,"Rezerved ");
 302         length=tvb_get_guint8(tvb,20);
 303         proto_tree_add_text (tree,tvb,20,1,"Prefix Length = %u",length);
 304         if (length % 8 == 0) addr_len=length/8 ; else addr_len=length/8+1;
 305         ip_addr[0]=ip_addr[1]=ip_addr[2]=ip_addr[3]=0;
 306         tvb_memcpy(tvb,ip_addr,21,addr_len);
 307         proto_tree_add_text (tree,tvb,21,addr_len,"Destination = %s",ip_to_str(ip_addr));
 308         proto_item_set_text (ti,"%s  =   %s/%u%s",match_strval(TLV_IP_INT,eigrp_tlv_vals),ip_to_str(ip_addr),length,((tvb_get_ntohl(tvb,4)==0xffffffff)?" - Destination unreachable":""));
 309 }
 310
 311 static void dissect_eigrp_ip_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
 312 {
 313         guint8 ip_addr[4],length,addr_len;
 314         tvb_memcpy(tvb,ip_addr,0,4);
 315         proto_tree_add_text (tree,tvb,0,4,"Next Hop = %s",ip_to_str(ip_addr));
 316         tvb_memcpy(tvb,ip_addr,4,4);
 317         proto_tree_add_text (tree,tvb,4,4,"Originating router = %s",ip_to_str(ip_addr));
 318         proto_tree_add_text (tree,tvb,8,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,8));
 319         proto_tree_add_text (tree,tvb,12,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,12));
 320         proto_tree_add_text (tree,tvb,16,4,"External protocol metric = %u",tvb_get_ntohl(tvb,16));
 321         proto_tree_add_text (tree,tvb,20,2,"Rezerved");
 322         proto_tree_add_text (tree,tvb,22,1,"External protocol ID = %u (%s)",tvb_get_guint8(tvb,22),val_to_str(tvb_get_guint8(tvb,22),eigrp_pid_vals, "Unknown"));
 323         proto_tree_add_text (tree,tvb,23,1,"Flags = 0x%0x",tvb_get_guint8(tvb,23));
 324
 325         proto_tree_add_text (tree,tvb,24,4,"Delay     = %u",tvb_get_ntohl(tvb,24));
 326         proto_tree_add_text (tree,tvb,28,4,"Bandwidth = %u",tvb_get_ntohl(tvb,28));
 327         proto_tree_add_text (tree,tvb,32,3,"MTU    = %u",tvb_get_ntoh24(tvb,32));
 328         proto_tree_add_text (tree,tvb,35,1,"Hop Count = %u",tvb_get_guint8(tvb,35));
 329         proto_tree_add_text (tree,tvb,36,1,"Reliability = %u",tvb_get_guint8(tvb,36));
 330         proto_tree_add_text (tree,tvb,37,1,"Load = %u",tvb_get_guint8(tvb,37));
 331         proto_tree_add_text (tree,tvb,38,2,"Rezerved ");
 332         length=tvb_get_guint8(tvb,40);
 333         proto_tree_add_text (tree,tvb,40,1,"Prefix Length = %u",length);
 334         if (length % 8 == 0) addr_len=length/8 ; else addr_len=length/8+1;
 335         ip_addr[0]=ip_addr[1]=ip_addr[2]=ip_addr[3]=0;
 336         tvb_memcpy(tvb,ip_addr,41,addr_len);
 337         proto_tree_add_text (tree,tvb,41,addr_len,"Destination = %s",ip_to_str(ip_addr));
 338         proto_item_set_text (ti,"%s  =   %s/%u%s",match_strval(TLV_IP_EXT,eigrp_tlv_vals),ip_to_str(ip_addr),length,((tvb_get_ntohl(tvb,24)==0xffffffff)?" - Destination unreachable":""));
 339 }
 340
 341
 342
 343 static void dissect_eigrp_ipx_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
 344 {
 345         proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %08x",tvb_get_ntohl(tvb,4));
 346         proto_tree_add_text (tree,tvb,4,6,"Next Hop ID      = %04x:%04x:%04x",tvb_get_ntohs(tvb,4),tvb_get_ntohs(tvb,6),tvb_get_ntohs(tvb,8));
 347         proto_tree_add_text (tree,tvb,10,4,"Delay     = %u",tvb_get_ntohl(tvb,10));
 348         proto_tree_add_text (tree,tvb,14,4,"Bandwidth = %u",tvb_get_ntohl(tvb,14));
 349         proto_tree_add_text (tree,tvb,18,3,"MTU    = %u",tvb_get_ntoh24(tvb,18));
 350         proto_tree_add_text (tree,tvb,21,1,"Hop Count = %u",tvb_get_guint8(tvb,21));
 351         proto_tree_add_text (tree,tvb,22,1,"Reliability = %u",tvb_get_guint8(tvb,22));
 352         proto_tree_add_text (tree,tvb,23,1,"Load = %u",tvb_get_guint8(tvb,23));
 353         proto_tree_add_text (tree,tvb,24,2,"Rezerved ");
 354         proto_tree_add_text (tree,tvb,26,4,"Destination Address =  %08x",tvb_get_ntohl(tvb,26));
 355         proto_item_set_text (ti,"%s  =   %08x%s",match_strval(TLV_IPX_INT,eigrp_tlv_vals),tvb_get_ntohl(tvb,26),((tvb_get_ntohl(tvb,10)==0xffffffff)?" - Destination unreachable":""));
 356 }
 357
 358 static void dissect_eigrp_ipx_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
 359 {
 360         proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %08x",tvb_get_ntohl(tvb,4));
 361         proto_tree_add_text (tree,tvb,4,6,"Next Hop ID      = %04x:%04x:%04x",tvb_get_ntohs(tvb,4),tvb_get_ntohs(tvb,6),tvb_get_ntohs(tvb,8));
 362
 363         proto_tree_add_text (tree,tvb,10,6,"Originating router ID = %04x:%04x:%04x",tvb_get_ntohs(tvb,10),tvb_get_ntohs(tvb,12),tvb_get_ntohs(tvb,14));
 364         proto_tree_add_text (tree,tvb,16,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,16));
 365         proto_tree_add_text (tree,tvb,20,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,20));
 366         proto_tree_add_text (tree,tvb,24,1,"External protocol  = %u",tvb_get_guint8(tvb,24));
 367         proto_tree_add_text (tree,tvb,25,1,"Rezerved");
 368         proto_tree_add_text (tree,tvb,26,2,"External metric = %u ",tvb_get_ntohs(tvb,26));
 369         proto_tree_add_text (tree,tvb,28,2,"External delay  = %u ",tvb_get_ntohs(tvb,28));
 370
 371         proto_tree_add_text (tree,tvb,30,4,"Delay     = %u",tvb_get_ntohl(tvb,30));
 372         proto_tree_add_text (tree,tvb,34,4,"Bandwidth = %u",tvb_get_ntohl(tvb,34));
 373         proto_tree_add_text (tree,tvb,38,3,"MTU    = %u",tvb_get_ntoh24(tvb,38));
 374         proto_tree_add_text (tree,tvb,41,1,"Hop Count = %u",tvb_get_guint8(tvb,41));
 375         proto_tree_add_text (tree,tvb,42,1,"Reliability = %u",tvb_get_guint8(tvb,42));
 376         proto_tree_add_text (tree,tvb,43,1,"Load = %u",tvb_get_guint8(tvb,43));
 377         proto_tree_add_text (tree,tvb,44,2,"Rezerved ");
 378         proto_tree_add_text (tree,tvb,46,4,"Destination Address =  %08x",tvb_get_ntohl(tvb,46));
 379         proto_item_set_text (ti,"%s  =   %08x%s",match_strval(TLV_IPX_EXT,eigrp_tlv_vals),tvb_get_ntohl(tvb,46),((tvb_get_ntohl(tvb,30)==0xffffffff)?" - Destination unreachable":""));
 380
 381 }
 382
 383
 384
 385 static void dissect_eigrp_at_cbl (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
 386 {
 387         proto_tree_add_text (tree,tvb,0,4,"AppleTalk Cable Range = %u-%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
 388         proto_tree_add_text (tree,tvb,4,4,"AppleTalk Router ID   = %u",tvb_get_ntohl(tvb,4));
 389         proto_item_set_text (ti,"%s : Cable range= %u-%u, Router ID= %u",match_strval(TLV_AT_CBL,eigrp_tlv_vals),tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2),tvb_get_ntohl(tvb,4));
 390
 391 }
 392
 393 static void dissect_eigrp_at_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
 394 {
 395         proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %u.%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
 396
 397         proto_tree_add_text (tree,tvb,4,4,"Delay     = %u",tvb_get_ntohl(tvb,4));
 398         proto_tree_add_text (tree,tvb,8,4,"Bandwidth = %u",tvb_get_ntohl(tvb,8));
 399         proto_tree_add_text (tree,tvb,12,3,"MTU    = %u",tvb_get_ntoh24(tvb,12));
 400         proto_tree_add_text (tree,tvb,15,1,"Hop Count = %u",tvb_get_guint8(tvb,15));
 401         proto_tree_add_text (tree,tvb,16,1,"Reliability = %u",tvb_get_guint8(tvb,16));
 402         proto_tree_add_text (tree,tvb,17,1,"Load = %u",tvb_get_guint8(tvb,17));
 403         proto_tree_add_text (tree,tvb,18,2,"Rezerved ");
 404         proto_tree_add_text (tree,tvb,20,4,"Cable range = %u-%u",tvb_get_ntohs(tvb,20),tvb_get_ntohs(tvb,22));
 405
 406         proto_item_set_text (ti,"%s : %u-%u",match_strval(TLV_AT_INT,eigrp_tlv_vals),tvb_get_ntohs(tvb,20),tvb_get_ntohs(tvb,22));
 407
 408 }
 409
 410 static void dissect_eigrp_at_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
 411 {
 412         proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %u.%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
 413         proto_tree_add_text (tree,tvb,4,4,"Originating router ID = %u",tvb_get_ntohl(tvb,4));
 414         proto_tree_add_text (tree,tvb,8,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,8));
 415         proto_tree_add_text (tree,tvb,12,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,12));
 416         proto_tree_add_text (tree,tvb,16,1,"External protocol ID = %u ",tvb_get_guint8(tvb,16));
 417         proto_tree_add_text (tree,tvb,17,1,"Flags = 0x%0x",tvb_get_guint8(tvb,17));
 418         proto_tree_add_text (tree,tvb,18,2,"External protocol metric = %u",tvb_get_ntohs(tvb,18));
 419
 420         proto_tree_add_text (tree,tvb,20,4,"Delay     = %u",tvb_get_ntohl(tvb,20));
 421         proto_tree_add_text (tree,tvb,24,4,"Bandwidth = %u",tvb_get_ntohl(tvb,24));
 422         proto_tree_add_text (tree,tvb,28,3,"MTU    = %u",tvb_get_ntoh24(tvb,28));
 423         proto_tree_add_text (tree,tvb,31,1,"Hop Count = %u",tvb_get_guint8(tvb,31));
 424         proto_tree_add_text (tree,tvb,32,1,"Reliability = %u",tvb_get_guint8(tvb,32));
 425         proto_tree_add_text (tree,tvb,33,1,"Load = %u",tvb_get_guint8(tvb,33));
 426         proto_tree_add_text (tree,tvb,34,2,"Rezerved ");
 427         proto_tree_add_text (tree,tvb,36,4,"Cable range = %u-%u",tvb_get_ntohs(tvb,36),tvb_get_ntohs(tvb,38));
 428
 429         proto_item_set_text (ti,"%s : %u-%u",match_strval(TLV_AT_EXT,eigrp_tlv_vals),tvb_get_ntohs(tvb,36),tvb_get_ntohs(tvb,38));
 430 }
 431
 432
 433
 434
 435 void
 436 proto_register_eigrp(void)
 437 {
 438   static hf_register_info hf[] = {
 439    { &hf_eigrp_opcode,
 440     { "Opcode", "eigrp.opcode",
 441      FT_UINT8, BASE_DEC, NULL, 0x0 ,
 442      "Opcode number" },
 443      },
 444    { &hf_eigrp_as,
 445     { "Autonomous System  ", "eigrp.as",
 446       FT_UINT16, BASE_DEC, NULL, 0x0 ,
 447      "Autonomous System number" }
 448     },
 449    { &hf_eigrp_tlv,
 450     { "Entry  ",           "eigrp.tlv",
 451       FT_UINT16, BASE_DEC, NULL, 0x0 ,
 452      "Type/Length/Value" }
 453     },
 454    };
 455
 456       static gint *ett[] = {
 457         &ett_eigrp,
 458         &ett_tlv,
 459       };
 460    proto_eigrp = proto_register_protocol("Enhanced Interior Gateway Routing Protocol", "eigrp");
 461    proto_register_field_array(proto_eigrp, hf, array_length(hf));
 462    proto_register_subtree_array(ett, array_length(ett));
 463    }
 464
 465 void
 466 proto_reg_handoff_eigrp(void)
 467 {
 468     dissector_add("ip.proto", IP_PROTO_EIGRP, dissect_eigrp);
 469     dissector_add("ddp.type", DDP_EIGRP, dissect_eigrp);
 470     dissector_add("ipx.socket", IPX_SOCKET_EIGRP, dissect_eigrp);
 471 }