2 * Routines for EIGRP dissection
3 * Copyright 2000, Paul Ionescu <paul@acorp.ro>
5 * $Id: packet-eigrp.c,v 1.27 2004/03/06 03:25:09 guy Exp $
7 * Ethereal - Network traffic analyzer
8 * By Gerald Combs <gerald@ethereal.com>
9 * Copyright 1998 Gerald Combs
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
31 #include <epan/packet.h>
32 #include <epan/resolv.h>
34 #include <epan/atalk-utils.h>
35 #include <epan/addr_and_mask.h>
37 #include "packet-ipx.h"
42 * http://www.rhyshaden.com/eigrp.htm
45 #define EIGRP_UPDATE 0x01
46 #define EIGRP_REQUEST 0x02
47 #define EIGRP_QUERY 0x03
48 #define EIGRP_REPLY 0x04
49 #define EIGRP_HELLO 0x05
50 #define EIGRP_SAP 0x06
51 #define EIGRP_HI 0x20 /* This value is for my own need to make a difference between Hello and Ack */
52 #define EIGRP_ACK 0x40 /* This value is for my own need to make a difference between Hello and Ack */
54 #define TLV_PAR 0x0001
55 #define TLV_AUTH 0x0002
56 #define TLV_SEQ 0x0003
58 #define TLV_NMS 0x0005
59 #define TLV_IP_INT 0x0102
60 #define TLV_IP_EXT 0x0103
61 #define TLV_AT_INT 0x0202
62 #define TLV_AT_EXT 0x0203
63 #define TLV_AT_CBL 0x0204
64 #define TLV_IPX_INT 0x0302
65 #define TLV_IPX_EXT 0x0303
67 #define EIGRP_HEADER_LENGTH 20
69 static gint proto_eigrp = -1;
71 static gint hf_eigrp_opcode = -1;
72 static gint hf_eigrp_as = -1;
73 static gint hf_eigrp_tlv = -1;
75 static gint ett_eigrp = -1;
76 static gint ett_tlv = -1;
78 static dissector_handle_t ipxsap_handle;
81 static const value_string eigrp_opcode_vals[] = {
82 { EIGRP_HELLO, "Hello/Ack" },
83 { EIGRP_UPDATE, "Update" },
84 { EIGRP_REPLY, "Reply" },
85 { EIGRP_QUERY, "Query" },
86 { EIGRP_REQUEST, "Request" },
87 { EIGRP_SAP, "IPX/SAP Update" },
88 { EIGRP_HI, "Hello" },
89 { EIGRP_ACK, "Acknowledge" },
93 static const value_string eigrp_tlv_vals[] = {
94 { TLV_PAR, "EIGRP Parameters"},
95 { TLV_AUTH, "Authentication data"},
96 { TLV_SEQ , "Sequence"},
97 { TLV_SV, "Software Version"},
98 { TLV_NMS , "Next multicast sequence"},
99 { TLV_IP_INT, "IP internal route"},
100 { TLV_IP_EXT, "IP external route"},
101 { TLV_AT_INT, "AppleTalk internal route"},
102 { TLV_AT_EXT, "AppleTalk external route"},
103 { TLV_AT_CBL, "AppleTalk cable configuration"},
104 { TLV_IPX_INT, "IPX internal route"},
105 { TLV_IPX_EXT, "IPX external route"},
109 static const value_string eigrp_pid_vals[] = {
112 { 3, "Static Route"},
120 { 11, "Connected link"},
125 static void dissect_eigrp_par (tvbuff_t *tvb, proto_tree *tree);
126 static void dissect_eigrp_seq (tvbuff_t *tvb, proto_tree *tree);
127 static void dissect_eigrp_sv (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
128 static void dissect_eigrp_nms (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
130 static void dissect_eigrp_ip_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
131 static void dissect_eigrp_ip_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
133 static void dissect_eigrp_ipx_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
134 static void dissect_eigrp_ipx_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
136 static void dissect_eigrp_at_cbl (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
137 static void dissect_eigrp_at_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
138 static void dissect_eigrp_at_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
141 dissect_eigrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
143 proto_tree *eigrp_tree,*tlv_tree;
146 guint opcode,opcode_tmp;
147 guint16 tlv,size, offset = EIGRP_HEADER_LENGTH;
150 if (check_col(pinfo->cinfo, COL_PROTOCOL))
151 col_set_str(pinfo->cinfo, COL_PROTOCOL, "EIGRP");
152 if (check_col(pinfo->cinfo, COL_INFO))
153 col_clear(pinfo->cinfo, COL_INFO);
155 opcode_tmp=opcode=tvb_get_guint8(tvb,1);
156 ack = tvb_get_ntohl(tvb,12);
157 if (opcode==EIGRP_HELLO) { if (ack == 0) opcode_tmp=EIGRP_HI; else opcode_tmp=EIGRP_ACK; }
159 if (check_col(pinfo->cinfo, COL_INFO))
160 col_add_str(pinfo->cinfo, COL_INFO,
161 val_to_str(opcode_tmp , eigrp_opcode_vals, "Unknown (0x%04x)"));
168 ti = proto_tree_add_protocol_format(tree, proto_eigrp, tvb, 0, -1,
171 eigrp_tree = proto_item_add_subtree(ti, ett_eigrp);
173 proto_tree_add_text (eigrp_tree, tvb, 0,1,"Version = %u",tvb_get_guint8(tvb,0)) ;
174 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")) ;
175 proto_tree_add_text (eigrp_tree, tvb, 2,2,"Checksum = 0x%04x",tvb_get_ntohs(tvb,2)) ;
176 proto_tree_add_text (eigrp_tree, tvb, 4,4,"Flags = 0x%08x",tvb_get_ntohl(tvb,4)) ;
177 proto_tree_add_text (eigrp_tree, tvb, 8,4,"Sequence = %u",tvb_get_ntohl(tvb,8)) ;
178 proto_tree_add_text (eigrp_tree, tvb, 12,4,"Acknowledge = %u",tvb_get_ntohl(tvb,12)) ;
179 proto_tree_add_uint (eigrp_tree, hf_eigrp_as, tvb, 16,4,tvb_get_ntohl(tvb,16)) ;
181 if (opcode==EIGRP_SAP)
183 call_dissector(ipxsap_handle, tvb_new_subset(tvb, EIGRP_HEADER_LENGTH, -1, -1), pinfo, eigrp_tree);
187 while ( tvb_reported_length_remaining(tvb,offset)>0 ) {
189 tlv = tvb_get_ntohs(tvb,offset);
190 size = tvb_get_ntohs(tvb,offset+2);
193 proto_tree_add_text(eigrp_tree,tvb,offset,-1,"Unknown data (maybe authentication)");
197 ti = proto_tree_add_text (eigrp_tree, tvb, offset,size,
198 "%s",val_to_str(tlv, eigrp_tlv_vals, "Unknown (0x%04x)"));
200 tlv_tree = proto_item_add_subtree (ti, ett_tlv);
201 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")) ;
202 proto_tree_add_text (tlv_tree,tvb,offset+2,2,"Size = %u bytes",size) ;
207 dissect_eigrp_par(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree);
210 dissect_eigrp_seq(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree);
213 dissect_eigrp_sv(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
216 dissect_eigrp_nms(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
220 dissect_eigrp_ip_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
223 dissect_eigrp_ip_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
227 dissect_eigrp_ipx_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
230 dissect_eigrp_ipx_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
234 dissect_eigrp_at_cbl(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
237 dissect_eigrp_at_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
240 dissect_eigrp_at_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
243 proto_tree_add_text(tlv_tree,tvb,offset+4,size-4,"Authentication data");
255 static void dissect_eigrp_par (tvbuff_t *tvb, proto_tree *tree) {
256 proto_tree_add_text (tree,tvb,0,1,"K1 = %u",tvb_get_guint8(tvb,0));
257 proto_tree_add_text (tree,tvb,1,1,"K2 = %u",tvb_get_guint8(tvb,1));
258 proto_tree_add_text (tree,tvb,2,1,"K3 = %u",tvb_get_guint8(tvb,2));
259 proto_tree_add_text (tree,tvb,3,1,"K4 = %u",tvb_get_guint8(tvb,3));
260 proto_tree_add_text (tree,tvb,4,1,"K5 = %u",tvb_get_guint8(tvb,4));
261 proto_tree_add_text (tree,tvb,5,1,"Reserved");
262 proto_tree_add_text (tree,tvb,6,2,"Hold Time = %u",tvb_get_ntohs(tvb,6));
265 static void dissect_eigrp_seq (tvbuff_t *tvb, proto_tree *tree)
267 addr_len=tvb_get_guint8(tvb,0);
268 proto_tree_add_text (tree,tvb,0,1,"Address length = %u",addr_len);
271 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));
274 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));
282 static void dissect_eigrp_sv (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
284 guint8 ios_rel_major, ios_rel_minor;
285 guint8 eigrp_rel_major, eigrp_rel_minor;
287 ios_rel_major = tvb_get_guint8(tvb,0);
288 ios_rel_minor = tvb_get_guint8(tvb,1);
289 proto_tree_add_text (tree,tvb,0,2," IOS release version = %u.%u",
290 ios_rel_major, ios_rel_minor);
291 proto_item_append_text (ti,": IOS=%u.%u", ios_rel_major, ios_rel_minor);
293 eigrp_rel_major = tvb_get_guint8(tvb,2);
294 eigrp_rel_minor = tvb_get_guint8(tvb,3);
295 proto_tree_add_text (tree,tvb,2,2,"EIGRP release version = %u.%u",
296 eigrp_rel_major, eigrp_rel_minor);
297 proto_item_append_text (ti,", EIGRP=%u.%u",
298 eigrp_rel_major, eigrp_rel_minor);
301 static void dissect_eigrp_nms (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
303 proto_tree_add_text (tree,tvb,0,4,"Next Multicast Sequence = %u",tvb_get_ntohl(tvb,0));
304 proto_item_append_text (ti,": %u",tvb_get_ntohl(tvb,0));
309 static void dissect_eigrp_ip_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
311 guint8 ip_addr[4],length;
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 proto_tree_add_text (tree,tvb,4,4, "Delay = %u",tvb_get_ntohl(tvb,4));
317 proto_tree_add_text (tree,tvb,8,4, "Bandwidth = %u",tvb_get_ntohl(tvb,8));
318 proto_tree_add_text (tree,tvb,12,3,"MTU = %u",tvb_get_ntoh24(tvb,12));
319 proto_tree_add_text (tree,tvb,15,1,"Hop Count = %u",tvb_get_guint8(tvb,15));
320 proto_tree_add_text (tree,tvb,16,1,"Reliability = %u",tvb_get_guint8(tvb,16));
321 proto_tree_add_text (tree,tvb,17,1,"Load = %u",tvb_get_guint8(tvb,17));
322 proto_tree_add_text (tree,tvb,18,2,"Reserved ");
323 length=tvb_get_guint8(tvb,20);
324 /* XXX - the EIGRP page whose URL appears at the top says this
325 field is 24 bits; what if the prefix length is > 24? */
326 addr_len=ipv4_addr_and_mask (tvb,21,ip_addr,length);
328 proto_tree_add_text (tree,tvb,20,1,"Prefix length = %u (invalid, must be <= 32)",length);
329 proto_item_append_text (ti," [Invalid prefix length %u > 32]",length);
331 proto_tree_add_text (tree,tvb,20,1,"Prefix Length = %u",length);
332 proto_tree_add_text (tree,tvb,21,addr_len,"Destination = %s",ip_to_str(ip_addr));
333 proto_item_append_text (ti," = %s/%u%s",ip_to_str(ip_addr),length,((tvb_get_ntohl(tvb,4)==0xffffffff)?" - Destination unreachable":""));
337 static void dissect_eigrp_ip_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
339 guint8 ip_addr[4],length;
342 tvb_memcpy(tvb,ip_addr,0,4);
343 proto_tree_add_text (tree,tvb,0,4,"Next Hop = %s",ip_to_str(ip_addr));
344 tvb_memcpy(tvb,ip_addr,4,4);
345 proto_tree_add_text (tree,tvb,4,4,"Originating router = %s",ip_to_str(ip_addr));
346 proto_tree_add_text (tree,tvb,8,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,8));
347 proto_tree_add_text (tree,tvb,12,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,12));
348 proto_tree_add_text (tree,tvb,16,4,"External protocol metric = %u",tvb_get_ntohl(tvb,16));
349 proto_tree_add_text (tree,tvb,20,2,"Reserved");
350 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"));
351 proto_tree_add_text (tree,tvb,23,1,"Flags = 0x%0x",tvb_get_guint8(tvb,23));
353 proto_tree_add_text (tree,tvb,24,4,"Delay = %u",tvb_get_ntohl(tvb,24));
354 proto_tree_add_text (tree,tvb,28,4,"Bandwidth = %u",tvb_get_ntohl(tvb,28));
355 proto_tree_add_text (tree,tvb,32,3,"MTU = %u",tvb_get_ntoh24(tvb,32));
356 proto_tree_add_text (tree,tvb,35,1,"Hop Count = %u",tvb_get_guint8(tvb,35));
357 proto_tree_add_text (tree,tvb,36,1,"Reliability = %u",tvb_get_guint8(tvb,36));
358 proto_tree_add_text (tree,tvb,37,1,"Load = %u",tvb_get_guint8(tvb,37));
359 proto_tree_add_text (tree,tvb,38,2,"Reserved ");
360 length=tvb_get_guint8(tvb,40);
361 /* XXX - the EIGRP page whose URL appears at the top says this
362 field is 24 bits; what if the prefix length is > 24? */
363 addr_len=ipv4_addr_and_mask (tvb,41,ip_addr,length);
365 proto_tree_add_text (tree,tvb,40,1,"Prefix length = %u (invalid, must be <= 32)",length);
366 proto_item_append_text (ti," [Invalid prefix length %u > 32]",length);
368 proto_tree_add_text (tree,tvb,40,1,"Prefix Length = %u",length);
369 proto_tree_add_text (tree,tvb,41,addr_len,"Destination = %s",ip_to_str(ip_addr));
370 proto_item_append_text (ti," = %s/%u%s",ip_to_str(ip_addr),length,((tvb_get_ntohl(tvb,4)==0xffffffff)?" - Destination unreachable":""));
376 static void dissect_eigrp_ipx_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
378 proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %08x",tvb_get_ntohl(tvb,4));
379 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));
380 proto_tree_add_text (tree,tvb,10,4,"Delay = %u",tvb_get_ntohl(tvb,10));
381 proto_tree_add_text (tree,tvb,14,4,"Bandwidth = %u",tvb_get_ntohl(tvb,14));
382 proto_tree_add_text (tree,tvb,18,3,"MTU = %u",tvb_get_ntoh24(tvb,18));
383 proto_tree_add_text (tree,tvb,21,1,"Hop Count = %u",tvb_get_guint8(tvb,21));
384 proto_tree_add_text (tree,tvb,22,1,"Reliability = %u",tvb_get_guint8(tvb,22));
385 proto_tree_add_text (tree,tvb,23,1,"Load = %u",tvb_get_guint8(tvb,23));
386 proto_tree_add_text (tree,tvb,24,2,"Reserved ");
387 proto_tree_add_text (tree,tvb,26,4,"Destination Address = %08x",tvb_get_ntohl(tvb,26));
388 proto_item_append_text (ti," = %08x%s",tvb_get_ntohl(tvb,26),((tvb_get_ntohl(tvb,10)==0xffffffff)?" - Destination unreachable":""));
391 static void dissect_eigrp_ipx_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
393 proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %08x",tvb_get_ntohl(tvb,4));
394 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));
396 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));
397 proto_tree_add_text (tree,tvb,16,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,16));
398 proto_tree_add_text (tree,tvb,20,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,20));
399 proto_tree_add_text (tree,tvb,24,1,"External protocol = %u",tvb_get_guint8(tvb,24));
400 proto_tree_add_text (tree,tvb,25,1,"Reserved");
401 proto_tree_add_text (tree,tvb,26,2,"External metric = %u ",tvb_get_ntohs(tvb,26));
402 proto_tree_add_text (tree,tvb,28,2,"External delay = %u ",tvb_get_ntohs(tvb,28));
404 proto_tree_add_text (tree,tvb,30,4,"Delay = %u",tvb_get_ntohl(tvb,30));
405 proto_tree_add_text (tree,tvb,34,4,"Bandwidth = %u",tvb_get_ntohl(tvb,34));
406 proto_tree_add_text (tree,tvb,38,3,"MTU = %u",tvb_get_ntoh24(tvb,38));
407 proto_tree_add_text (tree,tvb,41,1,"Hop Count = %u",tvb_get_guint8(tvb,41));
408 proto_tree_add_text (tree,tvb,42,1,"Reliability = %u",tvb_get_guint8(tvb,42));
409 proto_tree_add_text (tree,tvb,43,1,"Load = %u",tvb_get_guint8(tvb,43));
410 proto_tree_add_text (tree,tvb,44,2,"Reserved ");
411 proto_tree_add_text (tree,tvb,46,4,"Destination Address = %08x",tvb_get_ntohl(tvb,46));
412 proto_item_append_text (ti," = %08x%s",tvb_get_ntohl(tvb,46),((tvb_get_ntohl(tvb,30)==0xffffffff)?" - Destination unreachable":""));
418 static void dissect_eigrp_at_cbl (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
420 proto_tree_add_text (tree,tvb,0,4,"AppleTalk Cable Range = %u-%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
421 proto_tree_add_text (tree,tvb,4,4,"AppleTalk Router ID = %u",tvb_get_ntohl(tvb,4));
422 proto_item_append_text (ti,": Cable range= %u-%u, Router ID= %u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2),tvb_get_ntohl(tvb,4));
426 static void dissect_eigrp_at_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
428 proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %u.%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
430 proto_tree_add_text (tree,tvb,4,4,"Delay = %u",tvb_get_ntohl(tvb,4));
431 proto_tree_add_text (tree,tvb,8,4,"Bandwidth = %u",tvb_get_ntohl(tvb,8));
432 proto_tree_add_text (tree,tvb,12,3,"MTU = %u",tvb_get_ntoh24(tvb,12));
433 proto_tree_add_text (tree,tvb,15,1,"Hop Count = %u",tvb_get_guint8(tvb,15));
434 proto_tree_add_text (tree,tvb,16,1,"Reliability = %u",tvb_get_guint8(tvb,16));
435 proto_tree_add_text (tree,tvb,17,1,"Load = %u",tvb_get_guint8(tvb,17));
436 proto_tree_add_text (tree,tvb,18,2,"Reserved ");
437 proto_tree_add_text (tree,tvb,20,4,"Cable range = %u-%u",tvb_get_ntohs(tvb,20),tvb_get_ntohs(tvb,22));
439 proto_item_append_text (ti,": %u-%u",tvb_get_ntohs(tvb,20),tvb_get_ntohs(tvb,22));
443 static void dissect_eigrp_at_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
445 proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %u.%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
446 proto_tree_add_text (tree,tvb,4,4,"Originating router ID = %u",tvb_get_ntohl(tvb,4));
447 proto_tree_add_text (tree,tvb,8,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,8));
448 proto_tree_add_text (tree,tvb,12,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,12));
449 proto_tree_add_text (tree,tvb,16,1,"External protocol ID = %u ",tvb_get_guint8(tvb,16));
450 proto_tree_add_text (tree,tvb,17,1,"Flags = 0x%0x",tvb_get_guint8(tvb,17));
451 proto_tree_add_text (tree,tvb,18,2,"External protocol metric = %u",tvb_get_ntohs(tvb,18));
453 proto_tree_add_text (tree,tvb,20,4,"Delay = %u",tvb_get_ntohl(tvb,20));
454 proto_tree_add_text (tree,tvb,24,4,"Bandwidth = %u",tvb_get_ntohl(tvb,24));
455 proto_tree_add_text (tree,tvb,28,3,"MTU = %u",tvb_get_ntoh24(tvb,28));
456 proto_tree_add_text (tree,tvb,31,1,"Hop Count = %u",tvb_get_guint8(tvb,31));
457 proto_tree_add_text (tree,tvb,32,1,"Reliability = %u",tvb_get_guint8(tvb,32));
458 proto_tree_add_text (tree,tvb,33,1,"Load = %u",tvb_get_guint8(tvb,33));
459 proto_tree_add_text (tree,tvb,34,2,"Reserved ");
460 proto_tree_add_text (tree,tvb,36,4,"Cable range = %u-%u",tvb_get_ntohs(tvb,36),tvb_get_ntohs(tvb,38));
462 proto_item_append_text (ti,": %u-%u",tvb_get_ntohs(tvb,36),tvb_get_ntohs(tvb,38));
469 proto_register_eigrp(void)
471 static hf_register_info hf[] = {
473 { "Opcode", "eigrp.opcode",
474 FT_UINT8, BASE_DEC, NULL, 0x0 ,
475 "Opcode number", HFILL }
478 { "Autonomous System ", "eigrp.as",
479 FT_UINT16, BASE_DEC, NULL, 0x0 ,
480 "Autonomous System number", HFILL }
483 { "Entry ", "eigrp.tlv",
484 FT_UINT16, BASE_DEC, NULL, 0x0 ,
485 "Type/Length/Value", HFILL }
489 static gint *ett[] = {
493 proto_eigrp = proto_register_protocol("Enhanced Interior Gateway Routing Protocol",
495 proto_register_field_array(proto_eigrp, hf, array_length(hf));
496 proto_register_subtree_array(ett, array_length(ett));
500 proto_reg_handoff_eigrp(void)
502 dissector_handle_t eigrp_handle;
504 ipxsap_handle = find_dissector("ipxsap");
505 eigrp_handle = create_dissector_handle(dissect_eigrp, proto_eigrp);
506 dissector_add("ip.proto", IP_PROTO_EIGRP, eigrp_handle);
507 dissector_add("ddp.type", DDP_EIGRP, eigrp_handle);
508 dissector_add("ipx.socket", IPX_SOCKET_EIGRP, eigrp_handle);