2 * Routines for EIGRP dissection
3 * Copyright 2000, Paul Ionescu <paul@acorp.ro>
7 * Wireshark - Network traffic analyzer
8 * By Gerald Combs <gerald@wireshark.org>
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/addr_resolv.h>
34 #include <epan/atalk-utils.h>
35 #include <epan/addr_and_mask.h>
36 #include <epan/ipproto.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;
148 guint32 ack, size, offset = EIGRP_HEADER_LENGTH;
150 col_set_str(pinfo->cinfo, COL_PROTOCOL, "EIGRP");
151 col_clear(pinfo->cinfo, COL_INFO);
153 opcode_tmp=opcode=tvb_get_guint8(tvb,1);
154 ack = tvb_get_ntohl(tvb,12);
155 if (opcode==EIGRP_HELLO) { if (ack == 0) opcode_tmp=EIGRP_HI; else opcode_tmp=EIGRP_ACK; }
157 if (check_col(pinfo->cinfo, COL_INFO))
158 col_add_str(pinfo->cinfo, COL_INFO,
159 val_to_str(opcode_tmp , eigrp_opcode_vals, "Unknown (0x%04x)"));
166 ti = proto_tree_add_protocol_format(tree, proto_eigrp, tvb, 0, -1,
169 eigrp_tree = proto_item_add_subtree(ti, ett_eigrp);
171 proto_tree_add_text (eigrp_tree, tvb, 0,1,"Version = %u",tvb_get_guint8(tvb,0)) ;
172 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")) ;
173 proto_tree_add_text (eigrp_tree, tvb, 2,2,"Checksum = 0x%04x",tvb_get_ntohs(tvb,2)) ;
174 proto_tree_add_text (eigrp_tree, tvb, 4,4,"Flags = 0x%08x",tvb_get_ntohl(tvb,4)) ;
175 proto_tree_add_text (eigrp_tree, tvb, 8,4,"Sequence = %u",tvb_get_ntohl(tvb,8)) ;
176 proto_tree_add_text (eigrp_tree, tvb, 12,4,"Acknowledge = %u",tvb_get_ntohl(tvb,12)) ;
177 proto_tree_add_uint (eigrp_tree, hf_eigrp_as, tvb, 16,4,tvb_get_ntohl(tvb,16)) ;
179 if (opcode==EIGRP_SAP)
181 call_dissector(ipxsap_handle, tvb_new_subset_remaining(tvb, EIGRP_HEADER_LENGTH), pinfo, eigrp_tree);
185 while ( tvb_reported_length_remaining(tvb,offset)>0 ) {
187 tlv = tvb_get_ntohs(tvb,offset);
188 size = tvb_get_ntohs(tvb,offset+2);
191 proto_tree_add_text(eigrp_tree,tvb,offset,-1,"Unknown data (maybe authentication)");
195 ti = proto_tree_add_text (eigrp_tree, tvb, offset,size,
196 "%s",val_to_str(tlv, eigrp_tlv_vals, "Unknown (0x%04x)"));
198 tlv_tree = proto_item_add_subtree (ti, ett_tlv);
199 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")) ;
200 proto_tree_add_text (tlv_tree,tvb,offset+2,2,"Size = %u bytes",size) ;
205 dissect_eigrp_par(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree);
208 dissect_eigrp_seq(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree);
211 dissect_eigrp_sv(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
214 dissect_eigrp_nms(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
218 dissect_eigrp_ip_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
221 dissect_eigrp_ip_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
225 dissect_eigrp_ipx_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
228 dissect_eigrp_ipx_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
232 dissect_eigrp_at_cbl(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
235 dissect_eigrp_at_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
238 dissect_eigrp_at_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
241 proto_tree_add_text(tlv_tree,tvb,offset+4,size-4,"Authentication data");
253 static void dissect_eigrp_par (tvbuff_t *tvb, proto_tree *tree) {
254 proto_tree_add_text (tree,tvb,0,1,"K1 = %u",tvb_get_guint8(tvb,0));
255 proto_tree_add_text (tree,tvb,1,1,"K2 = %u",tvb_get_guint8(tvb,1));
256 proto_tree_add_text (tree,tvb,2,1,"K3 = %u",tvb_get_guint8(tvb,2));
257 proto_tree_add_text (tree,tvb,3,1,"K4 = %u",tvb_get_guint8(tvb,3));
258 proto_tree_add_text (tree,tvb,4,1,"K5 = %u",tvb_get_guint8(tvb,4));
259 proto_tree_add_text (tree,tvb,5,1,"Reserved");
260 proto_tree_add_text (tree,tvb,6,2,"Hold Time = %u",tvb_get_ntohs(tvb,6));
263 static void dissect_eigrp_seq (tvbuff_t *tvb, proto_tree *tree)
265 addr_len=tvb_get_guint8(tvb,0);
266 proto_tree_add_text (tree,tvb,0,1,"Address length = %u",addr_len);
269 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));
272 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));
280 static void dissect_eigrp_sv (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
282 guint8 ios_rel_major, ios_rel_minor;
283 guint8 eigrp_rel_major, eigrp_rel_minor;
285 ios_rel_major = tvb_get_guint8(tvb,0);
286 ios_rel_minor = tvb_get_guint8(tvb,1);
287 proto_tree_add_text (tree,tvb,0,2," IOS release version = %u.%u",
288 ios_rel_major, ios_rel_minor);
289 proto_item_append_text (ti,": IOS=%u.%u", ios_rel_major, ios_rel_minor);
291 eigrp_rel_major = tvb_get_guint8(tvb,2);
292 eigrp_rel_minor = tvb_get_guint8(tvb,3);
293 proto_tree_add_text (tree,tvb,2,2,"EIGRP release version = %u.%u",
294 eigrp_rel_major, eigrp_rel_minor);
295 proto_item_append_text (ti,", EIGRP=%u.%u",
296 eigrp_rel_major, eigrp_rel_minor);
299 static void dissect_eigrp_nms (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
301 proto_tree_add_text (tree,tvb,0,4,"Next Multicast Sequence = %u",tvb_get_ntohl(tvb,0));
302 proto_item_append_text (ti,": %u",tvb_get_ntohl(tvb,0));
307 static void dissect_eigrp_ip_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
309 guint8 ip_addr[4],length;
312 tvb_memcpy(tvb,ip_addr,0,4);
313 proto_tree_add_text (tree,tvb,0,4, "Next Hop = %s",ip_to_str(ip_addr));
314 proto_tree_add_text (tree,tvb,4,4, "Delay = %u",tvb_get_ntohl(tvb,4));
315 proto_tree_add_text (tree,tvb,8,4, "Bandwidth = %u",tvb_get_ntohl(tvb,8));
316 proto_tree_add_text (tree,tvb,12,3,"MTU = %u",tvb_get_ntoh24(tvb,12));
317 proto_tree_add_text (tree,tvb,15,1,"Hop Count = %u",tvb_get_guint8(tvb,15));
318 proto_tree_add_text (tree,tvb,16,1,"Reliability = %u",tvb_get_guint8(tvb,16));
319 proto_tree_add_text (tree,tvb,17,1,"Load = %u",tvb_get_guint8(tvb,17));
320 proto_tree_add_text (tree,tvb,18,2,"Reserved ");
322 for (offset = 20; tvb_length_remaining(tvb, offset) > 0; offset += (1+addr_len))
324 length=tvb_get_guint8(tvb,offset);
325 addr_len=ipv4_addr_and_mask (tvb,offset+1,ip_addr,length);
327 proto_tree_add_text (tree,tvb,offset,1,"Prefix length = %u (invalid, must be <= 32)",length);
328 proto_item_append_text (ti," [Invalid prefix length %u > 32]",length);
329 addr_len = 4; /* assure we can exit the loop */
331 proto_tree_add_text (tree,tvb,offset,1,"Prefix Length = %u",length);
332 proto_tree_add_text (tree,tvb,offset+1,addr_len,"Destination = %s",ip_to_str(ip_addr));
333 proto_item_append_text (ti," %c %s/%u%s",offset==20?'=':',',ip_to_str(ip_addr),length,((tvb_get_ntohl(tvb,4)==0xffffffff)?" - Destination unreachable":""));
338 static void dissect_eigrp_ip_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
340 guint8 ip_addr[4],length;
343 tvb_memcpy(tvb,ip_addr,0,4);
344 proto_tree_add_text (tree,tvb,0,4,"Next Hop = %s",ip_to_str(ip_addr));
345 tvb_memcpy(tvb,ip_addr,4,4);
346 proto_tree_add_text (tree,tvb,4,4,"Originating router = %s",ip_to_str(ip_addr));
347 proto_tree_add_text (tree,tvb,8,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,8));
348 proto_tree_add_text (tree,tvb,12,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,12));
349 proto_tree_add_text (tree,tvb,16,4,"External protocol metric = %u",tvb_get_ntohl(tvb,16));
350 proto_tree_add_text (tree,tvb,20,2,"Reserved");
351 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"));
352 proto_tree_add_text (tree,tvb,23,1,"Flags = 0x%0x",tvb_get_guint8(tvb,23));
354 proto_tree_add_text (tree,tvb,24,4,"Delay = %u",tvb_get_ntohl(tvb,24));
355 proto_tree_add_text (tree,tvb,28,4,"Bandwidth = %u",tvb_get_ntohl(tvb,28));
356 proto_tree_add_text (tree,tvb,32,3,"MTU = %u",tvb_get_ntoh24(tvb,32));
357 proto_tree_add_text (tree,tvb,35,1,"Hop Count = %u",tvb_get_guint8(tvb,35));
358 proto_tree_add_text (tree,tvb,36,1,"Reliability = %u",tvb_get_guint8(tvb,36));
359 proto_tree_add_text (tree,tvb,37,1,"Load = %u",tvb_get_guint8(tvb,37));
360 proto_tree_add_text (tree,tvb,38,2,"Reserved ");
362 for (offset = 40; tvb_length_remaining(tvb, offset) > 0; offset += (1+addr_len))
364 length=tvb_get_guint8(tvb,offset);
365 addr_len=ipv4_addr_and_mask (tvb,offset+1,ip_addr,length);
367 proto_tree_add_text (tree,tvb,offset,1,"Prefix length = %u (invalid, must be <= 32)",length);
368 proto_item_append_text (ti," [Invalid prefix length %u > 32]",length);
369 addr_len = 4; /* assure we can exit the loop */
371 proto_tree_add_text (tree,tvb,offset,1,"Prefix Length = %u",length);
372 proto_tree_add_text (tree,tvb,offset+1,addr_len,"Destination = %s",ip_to_str(ip_addr));
373 proto_item_append_text (ti," %c %s/%u%s",offset==40?'=':',',ip_to_str(ip_addr),length,((tvb_get_ntohl(tvb,24)==0xffffffff)?" - Destination unreachable":""));
380 static void dissect_eigrp_ipx_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
382 proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %08x",tvb_get_ntohl(tvb,4));
383 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));
384 proto_tree_add_text (tree,tvb,10,4,"Delay = %u",tvb_get_ntohl(tvb,10));
385 proto_tree_add_text (tree,tvb,14,4,"Bandwidth = %u",tvb_get_ntohl(tvb,14));
386 proto_tree_add_text (tree,tvb,18,3,"MTU = %u",tvb_get_ntoh24(tvb,18));
387 proto_tree_add_text (tree,tvb,21,1,"Hop Count = %u",tvb_get_guint8(tvb,21));
388 proto_tree_add_text (tree,tvb,22,1,"Reliability = %u",tvb_get_guint8(tvb,22));
389 proto_tree_add_text (tree,tvb,23,1,"Load = %u",tvb_get_guint8(tvb,23));
390 proto_tree_add_text (tree,tvb,24,2,"Reserved ");
391 proto_tree_add_text (tree,tvb,26,4,"Destination Address = %08x",tvb_get_ntohl(tvb,26));
392 proto_item_append_text (ti," = %08x%s",tvb_get_ntohl(tvb,26),((tvb_get_ntohl(tvb,10)==0xffffffff)?" - Destination unreachable":""));
395 static void dissect_eigrp_ipx_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
397 proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %08x",tvb_get_ntohl(tvb,4));
398 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));
400 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));
401 proto_tree_add_text (tree,tvb,16,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,16));
402 proto_tree_add_text (tree,tvb,20,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,20));
403 proto_tree_add_text (tree,tvb,24,1,"External protocol = %u",tvb_get_guint8(tvb,24));
404 proto_tree_add_text (tree,tvb,25,1,"Reserved");
405 proto_tree_add_text (tree,tvb,26,2,"External metric = %u ",tvb_get_ntohs(tvb,26));
406 proto_tree_add_text (tree,tvb,28,2,"External delay = %u ",tvb_get_ntohs(tvb,28));
408 proto_tree_add_text (tree,tvb,30,4,"Delay = %u",tvb_get_ntohl(tvb,30));
409 proto_tree_add_text (tree,tvb,34,4,"Bandwidth = %u",tvb_get_ntohl(tvb,34));
410 proto_tree_add_text (tree,tvb,38,3,"MTU = %u",tvb_get_ntoh24(tvb,38));
411 proto_tree_add_text (tree,tvb,41,1,"Hop Count = %u",tvb_get_guint8(tvb,41));
412 proto_tree_add_text (tree,tvb,42,1,"Reliability = %u",tvb_get_guint8(tvb,42));
413 proto_tree_add_text (tree,tvb,43,1,"Load = %u",tvb_get_guint8(tvb,43));
414 proto_tree_add_text (tree,tvb,44,2,"Reserved ");
415 proto_tree_add_text (tree,tvb,46,4,"Destination Address = %08x",tvb_get_ntohl(tvb,46));
416 proto_item_append_text (ti," = %08x%s",tvb_get_ntohl(tvb,46),((tvb_get_ntohl(tvb,30)==0xffffffff)?" - Destination unreachable":""));
422 static void dissect_eigrp_at_cbl (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
424 proto_tree_add_text (tree,tvb,0,4,"AppleTalk Cable Range = %u-%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
425 proto_tree_add_text (tree,tvb,4,4,"AppleTalk Router ID = %u",tvb_get_ntohl(tvb,4));
426 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));
430 static void dissect_eigrp_at_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
432 proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %u.%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
434 proto_tree_add_text (tree,tvb,4,4,"Delay = %u",tvb_get_ntohl(tvb,4));
435 proto_tree_add_text (tree,tvb,8,4,"Bandwidth = %u",tvb_get_ntohl(tvb,8));
436 proto_tree_add_text (tree,tvb,12,3,"MTU = %u",tvb_get_ntoh24(tvb,12));
437 proto_tree_add_text (tree,tvb,15,1,"Hop Count = %u",tvb_get_guint8(tvb,15));
438 proto_tree_add_text (tree,tvb,16,1,"Reliability = %u",tvb_get_guint8(tvb,16));
439 proto_tree_add_text (tree,tvb,17,1,"Load = %u",tvb_get_guint8(tvb,17));
440 proto_tree_add_text (tree,tvb,18,2,"Reserved ");
441 proto_tree_add_text (tree,tvb,20,4,"Cable range = %u-%u",tvb_get_ntohs(tvb,20),tvb_get_ntohs(tvb,22));
443 proto_item_append_text (ti,": %u-%u",tvb_get_ntohs(tvb,20),tvb_get_ntohs(tvb,22));
447 static void dissect_eigrp_at_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
449 proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %u.%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
450 proto_tree_add_text (tree,tvb,4,4,"Originating router ID = %u",tvb_get_ntohl(tvb,4));
451 proto_tree_add_text (tree,tvb,8,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,8));
452 proto_tree_add_text (tree,tvb,12,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,12));
453 proto_tree_add_text (tree,tvb,16,1,"External protocol ID = %u ",tvb_get_guint8(tvb,16));
454 proto_tree_add_text (tree,tvb,17,1,"Flags = 0x%0x",tvb_get_guint8(tvb,17));
455 proto_tree_add_text (tree,tvb,18,2,"External protocol metric = %u",tvb_get_ntohs(tvb,18));
457 proto_tree_add_text (tree,tvb,20,4,"Delay = %u",tvb_get_ntohl(tvb,20));
458 proto_tree_add_text (tree,tvb,24,4,"Bandwidth = %u",tvb_get_ntohl(tvb,24));
459 proto_tree_add_text (tree,tvb,28,3,"MTU = %u",tvb_get_ntoh24(tvb,28));
460 proto_tree_add_text (tree,tvb,31,1,"Hop Count = %u",tvb_get_guint8(tvb,31));
461 proto_tree_add_text (tree,tvb,32,1,"Reliability = %u",tvb_get_guint8(tvb,32));
462 proto_tree_add_text (tree,tvb,33,1,"Load = %u",tvb_get_guint8(tvb,33));
463 proto_tree_add_text (tree,tvb,34,2,"Reserved ");
464 proto_tree_add_text (tree,tvb,36,4,"Cable range = %u-%u",tvb_get_ntohs(tvb,36),tvb_get_ntohs(tvb,38));
466 proto_item_append_text (ti,": %u-%u",tvb_get_ntohs(tvb,36),tvb_get_ntohs(tvb,38));
473 proto_register_eigrp(void)
475 static hf_register_info hf[] = {
477 { "Opcode", "eigrp.opcode",
478 FT_UINT8, BASE_DEC, NULL, 0x0 ,
479 "Opcode number", HFILL }
482 { "Autonomous System", "eigrp.as",
483 FT_UINT16, BASE_DEC, NULL, 0x0 ,
484 "Autonomous System number", HFILL }
487 { "Entry", "eigrp.tlv",
488 FT_UINT16, BASE_DEC, NULL, 0x0 ,
489 "Type/Length/Value", HFILL }
493 static gint *ett[] = {
497 proto_eigrp = proto_register_protocol("Enhanced Interior Gateway Routing Protocol",
499 proto_register_field_array(proto_eigrp, hf, array_length(hf));
500 proto_register_subtree_array(ett, array_length(ett));
504 proto_reg_handoff_eigrp(void)
506 dissector_handle_t eigrp_handle;
508 ipxsap_handle = find_dissector("ipxsap");
509 eigrp_handle = create_dissector_handle(dissect_eigrp, proto_eigrp);
510 dissector_add("ip.proto", IP_PROTO_EIGRP, eigrp_handle);
511 dissector_add("ddp.type", DDP_EIGRP, eigrp_handle);
512 dissector_add("ipx.socket", IPX_SOCKET_EIGRP, eigrp_handle);