2 * Routines for EIGRP dissection
3 * Copyright 2000, Paul Ionescu <paul@acorp.ro>
5 * $Id: packet-eigrp.c,v 1.25 2002/08/28 21:00:13 jmayer 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>
36 #include "packet-ipx.h"
38 #define EIGRP_UPDATE 0x01
39 #define EIGRP_REQUEST 0x02
40 #define EIGRP_QUERY 0x03
41 #define EIGRP_REPLY 0x04
42 #define EIGRP_HELLO 0x05
43 #define EIGRP_SAP 0x06
44 #define EIGRP_HI 0x20 /* This value is for my own need to make a difference between Hello and Ack */
45 #define EIGRP_ACK 0x40 /* This value is for my own need to make a difference between Hello and Ack */
47 #define TLV_PAR 0x0001
48 #define TLV_AUTH 0x0002
49 #define TLV_SEQ 0x0003
51 #define TLV_NMS 0x0005
52 #define TLV_IP_INT 0x0102
53 #define TLV_IP_EXT 0x0103
54 #define TLV_AT_INT 0x0202
55 #define TLV_AT_EXT 0x0203
56 #define TLV_AT_CBL 0x0204
57 #define TLV_IPX_INT 0x0302
58 #define TLV_IPX_EXT 0x0303
60 #define EIGRP_HEADER_LENGTH 20
62 static gint proto_eigrp = -1;
64 static gint hf_eigrp_opcode = -1;
65 static gint hf_eigrp_as = -1;
66 static gint hf_eigrp_tlv = -1;
68 static gint ett_eigrp = -1;
69 static gint ett_tlv = -1;
71 static dissector_handle_t ipxsap_handle;
74 static const value_string eigrp_opcode_vals[] = {
75 { EIGRP_HELLO, "Hello/Ack" },
76 { EIGRP_UPDATE, "Update" },
77 { EIGRP_REPLY, "Reply" },
78 { EIGRP_QUERY, "Query" },
79 { EIGRP_REQUEST, "Request" },
80 { EIGRP_SAP, "IPX/SAP Update" },
81 { EIGRP_HI, "Hello" },
82 { EIGRP_ACK, "Acknowledge" },
86 static const value_string eigrp_tlv_vals[] = {
87 { TLV_PAR, "EIGRP Parameters"},
88 { TLV_AUTH, "Authentication data"},
89 { TLV_SEQ , "Sequence"},
90 { TLV_SV, "Software Version"},
91 { TLV_NMS , "Next multicast sequence"},
92 { TLV_IP_INT, "IP internal route"},
93 { TLV_IP_EXT, "IP external route"},
94 { TLV_AT_INT, "AppleTalk internal route"},
95 { TLV_AT_EXT, "AppleTalk external route"},
96 { TLV_AT_CBL, "AppleTalk cable configuration"},
97 { TLV_IPX_INT, "IPX internal route"},
98 { TLV_IPX_EXT, "IPX external route"},
102 static const value_string eigrp_pid_vals[] = {
105 { 3, "Static Route"},
113 { 11, "Connected link"},
118 static void dissect_eigrp_par (tvbuff_t *tvb, proto_tree *tree);
119 static void dissect_eigrp_seq (tvbuff_t *tvb, proto_tree *tree);
120 static void dissect_eigrp_sv (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
121 static void dissect_eigrp_nms (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
123 static void dissect_eigrp_ip_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
124 static void dissect_eigrp_ip_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
126 static void dissect_eigrp_ipx_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
127 static void dissect_eigrp_ipx_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
129 static void dissect_eigrp_at_cbl (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
130 static void dissect_eigrp_at_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
131 static void dissect_eigrp_at_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
134 dissect_eigrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
136 proto_tree *eigrp_tree,*tlv_tree;
139 guint opcode,opcode_tmp;
140 guint16 tlv,size, offset = EIGRP_HEADER_LENGTH;
143 if (check_col(pinfo->cinfo, COL_PROTOCOL))
144 col_set_str(pinfo->cinfo, COL_PROTOCOL, "EIGRP");
145 if (check_col(pinfo->cinfo, COL_INFO))
146 col_clear(pinfo->cinfo, COL_INFO);
148 opcode_tmp=opcode=tvb_get_guint8(tvb,1);
149 ack = tvb_get_ntohl(tvb,12);
150 if (opcode==EIGRP_HELLO) { if (ack == 0) opcode_tmp=EIGRP_HI; else opcode_tmp=EIGRP_ACK; }
152 if (check_col(pinfo->cinfo, COL_INFO))
153 col_add_str(pinfo->cinfo, COL_INFO,
154 val_to_str(opcode_tmp , eigrp_opcode_vals, "Unknown (0x%04x)"));
161 ti = proto_tree_add_protocol_format(tree, proto_eigrp, tvb, 0, -1,
164 eigrp_tree = proto_item_add_subtree(ti, ett_eigrp);
166 proto_tree_add_text (eigrp_tree, tvb, 0,1,"Version = %u",tvb_get_guint8(tvb,0)) ;
167 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")) ;
168 proto_tree_add_text (eigrp_tree, tvb, 2,2,"Checksum = 0x%04x",tvb_get_ntohs(tvb,2)) ;
169 proto_tree_add_text (eigrp_tree, tvb, 4,4,"Flags = 0x%08x",tvb_get_ntohl(tvb,4)) ;
170 proto_tree_add_text (eigrp_tree, tvb, 8,4,"Sequence = %u",tvb_get_ntohl(tvb,8)) ;
171 proto_tree_add_text (eigrp_tree, tvb, 12,4,"Acknowledge = %u",tvb_get_ntohl(tvb,12)) ;
172 proto_tree_add_uint (eigrp_tree, hf_eigrp_as, tvb, 16,4,tvb_get_ntohl(tvb,16)) ;
174 if (opcode==EIGRP_SAP)
176 call_dissector(ipxsap_handle, tvb_new_subset(tvb, EIGRP_HEADER_LENGTH, -1, -1), pinfo, eigrp_tree);
180 while ( tvb_reported_length_remaining(tvb,offset)>0 ) {
182 tlv = tvb_get_ntohs(tvb,offset);
183 size = tvb_get_ntohs(tvb,offset+2);
186 proto_tree_add_text(eigrp_tree,tvb,offset,-1,"Unknown data (maybe authentication)");
190 ti = proto_tree_add_text (eigrp_tree, tvb, offset,size,
191 "%s",val_to_str(tlv, eigrp_tlv_vals, "Unknown (0x%04x)"));
193 tlv_tree = proto_item_add_subtree (ti, ett_tlv);
194 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")) ;
195 proto_tree_add_text (tlv_tree,tvb,offset+2,2,"Size = %u bytes",size) ;
200 dissect_eigrp_par(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree);
203 dissect_eigrp_seq(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree);
206 dissect_eigrp_sv(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
209 dissect_eigrp_nms(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
213 dissect_eigrp_ip_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
216 dissect_eigrp_ip_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
220 dissect_eigrp_ipx_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
223 dissect_eigrp_ipx_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
227 dissect_eigrp_at_cbl(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
230 dissect_eigrp_at_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
233 dissect_eigrp_at_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
236 proto_tree_add_text(tlv_tree,tvb,offset+4,size-4,"Authentication data");
248 static void dissect_eigrp_par (tvbuff_t *tvb, proto_tree *tree) {
249 proto_tree_add_text (tree,tvb,0,1,"K1 = %u",tvb_get_guint8(tvb,0));
250 proto_tree_add_text (tree,tvb,1,1,"K2 = %u",tvb_get_guint8(tvb,1));
251 proto_tree_add_text (tree,tvb,2,1,"K3 = %u",tvb_get_guint8(tvb,2));
252 proto_tree_add_text (tree,tvb,3,1,"K4 = %u",tvb_get_guint8(tvb,3));
253 proto_tree_add_text (tree,tvb,4,1,"K5 = %u",tvb_get_guint8(tvb,4));
254 proto_tree_add_text (tree,tvb,5,1,"Reserved");
255 proto_tree_add_text (tree,tvb,6,2,"Hold Time = %u",tvb_get_ntohs(tvb,6));
258 static void dissect_eigrp_seq (tvbuff_t *tvb, proto_tree *tree)
260 addr_len=tvb_get_guint8(tvb,0);
261 proto_tree_add_text (tree,tvb,0,1,"Address length = %u",addr_len);
264 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));
267 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));
275 static void dissect_eigrp_sv (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
277 guint8 ios_rel_major, ios_rel_minor;
278 guint8 eigrp_rel_major, eigrp_rel_minor;
280 ios_rel_major = tvb_get_guint8(tvb,0);
281 ios_rel_minor = tvb_get_guint8(tvb,1);
282 proto_tree_add_text (tree,tvb,0,2," IOS release version = %u.%u",
283 ios_rel_major, ios_rel_minor);
284 proto_item_append_text (ti,": IOS=%u.%u", ios_rel_major, ios_rel_minor);
286 eigrp_rel_major = tvb_get_guint8(tvb,2);
287 eigrp_rel_minor = tvb_get_guint8(tvb,3);
288 proto_tree_add_text (tree,tvb,2,2,"EIGRP release version = %u.%u",
289 eigrp_rel_major, eigrp_rel_minor);
290 proto_item_append_text (ti,", EIGRP=%u.%u",
291 eigrp_rel_major, eigrp_rel_minor);
294 static void dissect_eigrp_nms (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
296 proto_tree_add_text (tree,tvb,0,4,"Next Multicast Sequence = %u",tvb_get_ntohl(tvb,0));
297 proto_item_append_text (ti,": %u",tvb_get_ntohl(tvb,0));
302 static void dissect_eigrp_ip_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
304 guint8 ip_addr[4],length,addr_len;
305 tvb_memcpy(tvb,ip_addr,0,4);
306 proto_tree_add_text (tree,tvb,0,4, "Next Hop = %s",ip_to_str(ip_addr));
307 proto_tree_add_text (tree,tvb,4,4, "Delay = %u",tvb_get_ntohl(tvb,4));
308 proto_tree_add_text (tree,tvb,8,4, "Bandwidth = %u",tvb_get_ntohl(tvb,8));
309 proto_tree_add_text (tree,tvb,12,3,"MTU = %u",tvb_get_ntoh24(tvb,12));
310 proto_tree_add_text (tree,tvb,15,1,"Hop Count = %u",tvb_get_guint8(tvb,15));
311 proto_tree_add_text (tree,tvb,16,1,"Reliability = %u",tvb_get_guint8(tvb,16));
312 proto_tree_add_text (tree,tvb,17,1,"Load = %u",tvb_get_guint8(tvb,17));
313 proto_tree_add_text (tree,tvb,18,2,"Reserved ");
314 length=tvb_get_guint8(tvb,20);
315 proto_tree_add_text (tree,tvb,20,1,"Prefix Length = %u",length);
316 if (length % 8 == 0) addr_len=length/8 ; else addr_len=length/8+1;
317 ip_addr[0]=ip_addr[1]=ip_addr[2]=ip_addr[3]=0;
318 tvb_memcpy(tvb,ip_addr,21,addr_len);
319 proto_tree_add_text (tree,tvb,21,addr_len,"Destination = %s",ip_to_str(ip_addr));
320 proto_item_append_text (ti," = %s/%u%s",ip_to_str(ip_addr),length,((tvb_get_ntohl(tvb,4)==0xffffffff)?" - Destination unreachable":""));
323 static void dissect_eigrp_ip_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
325 guint8 ip_addr[4],length,addr_len;
326 tvb_memcpy(tvb,ip_addr,0,4);
327 proto_tree_add_text (tree,tvb,0,4,"Next Hop = %s",ip_to_str(ip_addr));
328 tvb_memcpy(tvb,ip_addr,4,4);
329 proto_tree_add_text (tree,tvb,4,4,"Originating router = %s",ip_to_str(ip_addr));
330 proto_tree_add_text (tree,tvb,8,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,8));
331 proto_tree_add_text (tree,tvb,12,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,12));
332 proto_tree_add_text (tree,tvb,16,4,"External protocol metric = %u",tvb_get_ntohl(tvb,16));
333 proto_tree_add_text (tree,tvb,20,2,"Reserved");
334 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"));
335 proto_tree_add_text (tree,tvb,23,1,"Flags = 0x%0x",tvb_get_guint8(tvb,23));
337 proto_tree_add_text (tree,tvb,24,4,"Delay = %u",tvb_get_ntohl(tvb,24));
338 proto_tree_add_text (tree,tvb,28,4,"Bandwidth = %u",tvb_get_ntohl(tvb,28));
339 proto_tree_add_text (tree,tvb,32,3,"MTU = %u",tvb_get_ntoh24(tvb,32));
340 proto_tree_add_text (tree,tvb,35,1,"Hop Count = %u",tvb_get_guint8(tvb,35));
341 proto_tree_add_text (tree,tvb,36,1,"Reliability = %u",tvb_get_guint8(tvb,36));
342 proto_tree_add_text (tree,tvb,37,1,"Load = %u",tvb_get_guint8(tvb,37));
343 proto_tree_add_text (tree,tvb,38,2,"Reserved ");
344 length=tvb_get_guint8(tvb,40);
345 proto_tree_add_text (tree,tvb,40,1,"Prefix Length = %u",length);
346 if (length % 8 == 0) addr_len=length/8 ; else addr_len=length/8+1;
347 ip_addr[0]=ip_addr[1]=ip_addr[2]=ip_addr[3]=0;
348 tvb_memcpy(tvb,ip_addr,41,addr_len);
349 proto_tree_add_text (tree,tvb,41,addr_len,"Destination = %s",ip_to_str(ip_addr));
350 proto_item_append_text (ti," = %s/%u%s",ip_to_str(ip_addr),length,((tvb_get_ntohl(tvb,24)==0xffffffff)?" - Destination unreachable":""));
355 static void dissect_eigrp_ipx_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
357 proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %08x",tvb_get_ntohl(tvb,4));
358 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));
359 proto_tree_add_text (tree,tvb,10,4,"Delay = %u",tvb_get_ntohl(tvb,10));
360 proto_tree_add_text (tree,tvb,14,4,"Bandwidth = %u",tvb_get_ntohl(tvb,14));
361 proto_tree_add_text (tree,tvb,18,3,"MTU = %u",tvb_get_ntoh24(tvb,18));
362 proto_tree_add_text (tree,tvb,21,1,"Hop Count = %u",tvb_get_guint8(tvb,21));
363 proto_tree_add_text (tree,tvb,22,1,"Reliability = %u",tvb_get_guint8(tvb,22));
364 proto_tree_add_text (tree,tvb,23,1,"Load = %u",tvb_get_guint8(tvb,23));
365 proto_tree_add_text (tree,tvb,24,2,"Reserved ");
366 proto_tree_add_text (tree,tvb,26,4,"Destination Address = %08x",tvb_get_ntohl(tvb,26));
367 proto_item_append_text (ti," = %08x%s",tvb_get_ntohl(tvb,26),((tvb_get_ntohl(tvb,10)==0xffffffff)?" - Destination unreachable":""));
370 static void dissect_eigrp_ipx_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
372 proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %08x",tvb_get_ntohl(tvb,4));
373 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));
375 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));
376 proto_tree_add_text (tree,tvb,16,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,16));
377 proto_tree_add_text (tree,tvb,20,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,20));
378 proto_tree_add_text (tree,tvb,24,1,"External protocol = %u",tvb_get_guint8(tvb,24));
379 proto_tree_add_text (tree,tvb,25,1,"Reserved");
380 proto_tree_add_text (tree,tvb,26,2,"External metric = %u ",tvb_get_ntohs(tvb,26));
381 proto_tree_add_text (tree,tvb,28,2,"External delay = %u ",tvb_get_ntohs(tvb,28));
383 proto_tree_add_text (tree,tvb,30,4,"Delay = %u",tvb_get_ntohl(tvb,30));
384 proto_tree_add_text (tree,tvb,34,4,"Bandwidth = %u",tvb_get_ntohl(tvb,34));
385 proto_tree_add_text (tree,tvb,38,3,"MTU = %u",tvb_get_ntoh24(tvb,38));
386 proto_tree_add_text (tree,tvb,41,1,"Hop Count = %u",tvb_get_guint8(tvb,41));
387 proto_tree_add_text (tree,tvb,42,1,"Reliability = %u",tvb_get_guint8(tvb,42));
388 proto_tree_add_text (tree,tvb,43,1,"Load = %u",tvb_get_guint8(tvb,43));
389 proto_tree_add_text (tree,tvb,44,2,"Reserved ");
390 proto_tree_add_text (tree,tvb,46,4,"Destination Address = %08x",tvb_get_ntohl(tvb,46));
391 proto_item_append_text (ti," = %08x%s",tvb_get_ntohl(tvb,46),((tvb_get_ntohl(tvb,30)==0xffffffff)?" - Destination unreachable":""));
397 static void dissect_eigrp_at_cbl (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
399 proto_tree_add_text (tree,tvb,0,4,"AppleTalk Cable Range = %u-%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
400 proto_tree_add_text (tree,tvb,4,4,"AppleTalk Router ID = %u",tvb_get_ntohl(tvb,4));
401 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));
405 static void dissect_eigrp_at_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
407 proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %u.%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
409 proto_tree_add_text (tree,tvb,4,4,"Delay = %u",tvb_get_ntohl(tvb,4));
410 proto_tree_add_text (tree,tvb,8,4,"Bandwidth = %u",tvb_get_ntohl(tvb,8));
411 proto_tree_add_text (tree,tvb,12,3,"MTU = %u",tvb_get_ntoh24(tvb,12));
412 proto_tree_add_text (tree,tvb,15,1,"Hop Count = %u",tvb_get_guint8(tvb,15));
413 proto_tree_add_text (tree,tvb,16,1,"Reliability = %u",tvb_get_guint8(tvb,16));
414 proto_tree_add_text (tree,tvb,17,1,"Load = %u",tvb_get_guint8(tvb,17));
415 proto_tree_add_text (tree,tvb,18,2,"Reserved ");
416 proto_tree_add_text (tree,tvb,20,4,"Cable range = %u-%u",tvb_get_ntohs(tvb,20),tvb_get_ntohs(tvb,22));
418 proto_item_append_text (ti,": %u-%u",tvb_get_ntohs(tvb,20),tvb_get_ntohs(tvb,22));
422 static void dissect_eigrp_at_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
424 proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %u.%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
425 proto_tree_add_text (tree,tvb,4,4,"Originating router ID = %u",tvb_get_ntohl(tvb,4));
426 proto_tree_add_text (tree,tvb,8,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,8));
427 proto_tree_add_text (tree,tvb,12,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,12));
428 proto_tree_add_text (tree,tvb,16,1,"External protocol ID = %u ",tvb_get_guint8(tvb,16));
429 proto_tree_add_text (tree,tvb,17,1,"Flags = 0x%0x",tvb_get_guint8(tvb,17));
430 proto_tree_add_text (tree,tvb,18,2,"External protocol metric = %u",tvb_get_ntohs(tvb,18));
432 proto_tree_add_text (tree,tvb,20,4,"Delay = %u",tvb_get_ntohl(tvb,20));
433 proto_tree_add_text (tree,tvb,24,4,"Bandwidth = %u",tvb_get_ntohl(tvb,24));
434 proto_tree_add_text (tree,tvb,28,3,"MTU = %u",tvb_get_ntoh24(tvb,28));
435 proto_tree_add_text (tree,tvb,31,1,"Hop Count = %u",tvb_get_guint8(tvb,31));
436 proto_tree_add_text (tree,tvb,32,1,"Reliability = %u",tvb_get_guint8(tvb,32));
437 proto_tree_add_text (tree,tvb,33,1,"Load = %u",tvb_get_guint8(tvb,33));
438 proto_tree_add_text (tree,tvb,34,2,"Reserved ");
439 proto_tree_add_text (tree,tvb,36,4,"Cable range = %u-%u",tvb_get_ntohs(tvb,36),tvb_get_ntohs(tvb,38));
441 proto_item_append_text (ti,": %u-%u",tvb_get_ntohs(tvb,36),tvb_get_ntohs(tvb,38));
448 proto_register_eigrp(void)
450 static hf_register_info hf[] = {
452 { "Opcode", "eigrp.opcode",
453 FT_UINT8, BASE_DEC, NULL, 0x0 ,
454 "Opcode number", HFILL }
457 { "Autonomous System ", "eigrp.as",
458 FT_UINT16, BASE_DEC, NULL, 0x0 ,
459 "Autonomous System number", HFILL }
462 { "Entry ", "eigrp.tlv",
463 FT_UINT16, BASE_DEC, NULL, 0x0 ,
464 "Type/Length/Value", HFILL }
468 static gint *ett[] = {
472 proto_eigrp = proto_register_protocol("Enhanced Interior Gateway Routing Protocol",
474 proto_register_field_array(proto_eigrp, hf, array_length(hf));
475 proto_register_subtree_array(ett, array_length(ett));
479 proto_reg_handoff_eigrp(void)
481 dissector_handle_t eigrp_handle;
483 ipxsap_handle = find_dissector("ipxsap");
484 eigrp_handle = create_dissector_handle(dissect_eigrp, proto_eigrp);
485 dissector_add("ip.proto", IP_PROTO_EIGRP, eigrp_handle);
486 dissector_add("ddp.type", DDP_EIGRP, eigrp_handle);
487 dissector_add("ipx.socket", IPX_SOCKET_EIGRP, eigrp_handle);