1 /* packet-dvmrp.c 2001 Ronnie Sahlberg <See AUTHORS for email>
2 * Routines for IGMP/DVMRP packet disassembly
4 * $Id: packet-dvmrp.c,v 1.9 2002/04/02 05:12:12 guy Exp $
6 * Ethereal - Network traffic analyzer
7 * By Gerald Combs <gerald@ethereal.com>
8 * Copyright 1998 Gerald Combs
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version 2
13 * of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
39 * V3 has len>=8 and byte[6]==0xff and byte[7]==0x03
42 DVMRP is defined in the following RFCs
44 draft-ietf-idmr-dvmrp-v3-10.txt Version 3
46 V1 and V3 can be distinguished by looking at bytes 6 and 7 in the
48 If header[6]==0xff and header[7]==0x03 we have version 3.
51 RFC1075 has typos in 3.12.2 and 3.12.4, see if you can spot them.
58 #ifdef HAVE_SYS_TYPES_H
59 # include <sys/types.h>
66 #include <epan/packet.h>
68 #include "packet-igmp.h"
69 #include "packet-dvmrp.h"
71 static int proto_dvmrp = -1;
72 static int hf_version = -1;
73 static int hf_type = -1;
74 static int hf_code_v1 = -1;
75 static int hf_checksum = -1;
76 static int hf_checksum_bad = -1;
77 static int hf_commands = -1;
78 static int hf_command = -1;
79 static int hf_count = -1;
80 static int hf_afi = -1;
81 static int hf_netmask = -1;
82 static int hf_metric = -1;
83 static int hf_dest_unr = -1;
84 static int hf_split_horiz = -1;
85 static int hf_infinity = -1;
86 static int hf_daddr = -1;
87 static int hf_maddr = -1;
88 static int hf_hold = -1;
89 static int hf_code_v3 = -1;
90 static int hf_capabilities = -1;
91 static int hf_cap_leaf = -1;
92 static int hf_cap_prune = -1;
93 static int hf_cap_genid = -1;
94 static int hf_cap_mtrace = -1;
95 static int hf_cap_snmp = -1;
96 static int hf_cap_netmask = -1;
97 static int hf_min_ver = -1;
98 static int hf_maj_ver = -1;
99 static int hf_genid = -1;
100 static int hf_route = -1;
101 static int hf_saddr = -1;
102 static int hf_life = -1;
103 static int hf_neighbor = -1;
105 static int ett_dvmrp = -1;
106 static int ett_commands = -1;
107 static int ett_capabilities = -1;
108 static int ett_route = -1;
111 #define DVMRP_TYPE 0x13
112 static const value_string dvmrp_type[] = {
113 {DVMRP_TYPE, "DVMRP" },
117 #define DVMRP_V1_RESPONSE 1
118 #define DVMRP_V1_REQUEST 2
119 #define DVMRP_V1_NON_MEMBERSHIP_REPORT 3
120 #define DVMRP_V1_NON_MEMBERSHIP_CANCELLATION 4
121 static const value_string code_v1[] = {
122 {DVMRP_V1_RESPONSE, "Response" },
123 {DVMRP_V1_REQUEST, "Request" },
124 {DVMRP_V1_NON_MEMBERSHIP_REPORT, "Non-membership report" },
125 {DVMRP_V1_NON_MEMBERSHIP_CANCELLATION, "Non-membership cancellation" },
129 #define DVMRP_V3_PROBE 0x1
130 #define DVMRP_V3_REPORT 0x2
131 #define DVMRP_V3_ASK_NEIGHBORS 0x3
132 #define DVMRP_V3_NEIGHBORS 0x4
133 #define DVMRP_V3_ASK_NEIGHBORS_2 0x5
134 #define DVMRP_V3_NEIGHBORS_2 0x6
135 #define DVMRP_V3_PRUNE 0x7
136 #define DVMRP_V3_GRAFT 0x8
137 #define DVMRP_V3_GRAFT_ACK 0x9
138 static const value_string code_v3[] = {
139 {DVMRP_V3_PROBE, "Probe"},
140 {DVMRP_V3_REPORT, "Report"},
141 {DVMRP_V3_ASK_NEIGHBORS, "Ask Neighbors"},
142 {DVMRP_V3_NEIGHBORS, "Neighbors"},
143 {DVMRP_V3_ASK_NEIGHBORS_2, "Ask Neighbors 2"},
144 {DVMRP_V3_NEIGHBORS_2, "Neighbors 2"},
145 {DVMRP_V3_PRUNE, "Prune"},
146 {DVMRP_V3_GRAFT, "Graft"},
147 {DVMRP_V3_GRAFT_ACK, "Graft ACK"},
151 #define DVMRP_V3_CAP_LEAF 0x01
152 #define DVMRP_V3_CAP_PRUNE 0x02
153 #define DVMRP_V3_CAP_GENID 0x04
154 #define DVMRP_V3_CAP_MTRACE 0x08
155 #define DVMRP_V3_CAP_SNMP 0x10
156 #define DVMRP_V3_CAP_NETMASK 0x20
159 #define V1_COMMAND_NULL 0
160 #define V1_COMMAND_AFI 2
161 #define V1_COMMAND_SUBNETMASK 3
162 #define V1_COMMAND_METRIC 4
163 #define V1_COMMAND_FLAGS0 5
164 #define V1_COMMAND_INFINITY 6
165 #define V1_COMMAND_DA 7
166 #define V1_COMMAND_RDA 8
167 #define V1_COMMAND_NMR 9
168 #define V1_COMMAND_NMR_CANCEL 10
169 static const value_string command[] = {
170 {V1_COMMAND_NULL, "NULL" },
171 {V1_COMMAND_AFI, "Address Family Indicator"},
172 {V1_COMMAND_SUBNETMASK, "Subnetmask"},
173 {V1_COMMAND_METRIC, "Metric"},
174 {V1_COMMAND_FLAGS0, "Flags0"},
175 {V1_COMMAND_INFINITY, "Infinity"},
176 {V1_COMMAND_DA, "Destination Address"},
177 {V1_COMMAND_RDA, "Requested Destination Address"},
178 {V1_COMMAND_NMR, "Non-Membership Report"},
179 {V1_COMMAND_NMR_CANCEL, "Non-Membership Report Cancel"},
184 static const value_string afi[] = {
185 {V1_AFI_IP, "IP v4 Family"},
189 static const true_false_string tfs_dest_unreach = {
190 "Destination Unreachable",
191 "NOT Destination Unreachable"
194 static const true_false_string tfs_split_horiz = {
195 "Split Horizon concealed route",
196 "NOT Split Horizon concealed route"
199 static const true_false_string tfs_cap_leaf = {
203 static const true_false_string tfs_cap_prune = {
207 static const true_false_string tfs_cap_genid = {
211 static const true_false_string tfs_cap_mtrace = {
212 "Multicast Traceroute capable",
213 "NOT Multicast Traceroute capable"
215 static const true_false_string tfs_cap_snmp = {
219 static const true_false_string tfs_cap_netmask = {
221 "NOT Netmask capable"
225 dissect_v3_report(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, int offset)
232 while (tvb_reported_length_remaining(tvb, offset) > 0) {
235 int old_offset = offset;
237 item = proto_tree_add_item(parent_tree, hf_route,
238 tvb, offset, -1, FALSE);
239 tree = proto_item_add_subtree(item, ett_route);
243 m1 = tvb_get_guint8(tvb, offset);
244 m2 = tvb_get_guint8(tvb, offset+1);
245 m3 = tvb_get_guint8(tvb, offset+2);
251 proto_tree_add_ipv4(tree, hf_netmask, tvb, offset, 3, ip);
255 /* read every srcnet, metric pairs */
257 int old_offset = offset;
265 s0 = tvb_get_guint8(tvb, offset);
268 s1 = tvb_get_guint8(tvb, offset);
272 s2 = tvb_get_guint8(tvb, offset);
276 s3 = tvb_get_guint8(tvb, offset);
280 /* handle special case for default route V3/3.4.3 */
281 if ((!m1)&&(!m2)&&(!m3)&&(!s0)) {
289 proto_tree_add_ipv4_format(tree, hf_saddr, tvb,
290 old_offset, offset-old_offset, ip,
291 "%s %d.%d.%d.%d (netmask %d.%d.%d.%d)",
292 m0?"Source Network":"Default Route",
293 s0,s1,s2,s3,m0,m1,m2,m3);
295 metric = tvb_get_guint8(tvb, offset);
296 proto_tree_add_uint(tree, hf_metric, tvb,
297 offset, 1, metric&0x7f);
301 } while (!(metric&0x80));
303 proto_item_set_len(item, offset-old_offset);
310 dissect_dvmrp_v3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, int offset)
315 proto_tree_add_uint(parent_tree, hf_version, tvb, 0, 0, 3);
317 /* type of command */
318 proto_tree_add_uint(parent_tree, hf_type, tvb, offset, 1, 0x13);
322 code = tvb_get_guint8(tvb, offset);
323 proto_tree_add_uint(parent_tree, hf_code_v3, tvb, offset, 1, code);
325 if (check_col(pinfo->cinfo, COL_INFO)) {
326 col_add_fstr(pinfo->cinfo, COL_INFO,
327 "V%d %s",3 ,val_to_str(code, code_v3,
328 "Unknown Type:0x%02x"));
332 igmp_checksum(parent_tree, tvb, hf_checksum, hf_checksum_bad, pinfo, 0);
335 /* skip unused byte */
338 /* PROBE and NEIGHBORS 2 packets have capabilities flags, unused
340 if (code==DVMRP_V3_PROBE || code==DVMRP_V3_NEIGHBORS_2) {
344 item = proto_tree_add_item(parent_tree, hf_capabilities,
345 tvb, offset, 1, FALSE);
346 tree = proto_item_add_subtree(item, ett_capabilities);
348 count = tvb_get_guint8(tvb, offset);
349 proto_tree_add_boolean(tree, hf_cap_netmask, tvb, offset, 1, count);
350 proto_tree_add_boolean(tree, hf_cap_snmp, tvb, offset, 1, count);
351 proto_tree_add_boolean(tree, hf_cap_mtrace, tvb, offset, 1, count);
352 proto_tree_add_boolean(tree, hf_cap_genid, tvb, offset, 1, count);
353 proto_tree_add_boolean(tree, hf_cap_prune, tvb, offset, 1, count);
354 proto_tree_add_boolean(tree, hf_cap_leaf, tvb, offset, 1, count);
359 proto_tree_add_item(parent_tree, hf_min_ver, tvb, offset, 1, FALSE);
363 proto_tree_add_item(parent_tree, hf_maj_ver, tvb, offset, 1, FALSE);
369 proto_tree_add_item(parent_tree, hf_genid, tvb,
372 while (tvb_reported_length_remaining(tvb, offset) > 0) {
373 proto_tree_add_item(parent_tree, hf_neighbor,
374 tvb, offset, 4, FALSE);
378 case DVMRP_V3_REPORT:
379 offset = dissect_v3_report(tvb, pinfo, parent_tree, offset);
383 proto_tree_add_item(parent_tree, hf_saddr,
384 tvb, offset, 4, FALSE);
387 proto_tree_add_item(parent_tree, hf_maddr,
388 tvb, offset, 4, FALSE);
391 proto_tree_add_item(parent_tree, hf_life,
392 tvb, offset, 4, FALSE);
395 if (tvb_reported_length_remaining(tvb, offset)>=4) {
396 proto_tree_add_item(parent_tree, hf_netmask,
397 tvb, offset, 4, FALSE);
403 proto_tree_add_item(parent_tree, hf_saddr,
404 tvb, offset, 4, FALSE);
407 proto_tree_add_item(parent_tree, hf_maddr,
408 tvb, offset, 4, FALSE);
411 if (tvb_reported_length_remaining(tvb, offset)>=4) {
412 proto_tree_add_item(parent_tree, hf_netmask,
413 tvb, offset, 4, FALSE);
417 case DVMRP_V3_GRAFT_ACK:
419 proto_tree_add_item(parent_tree, hf_saddr,
420 tvb, offset, 4, FALSE);
423 proto_tree_add_item(parent_tree, hf_maddr,
424 tvb, offset, 4, FALSE);
427 if (tvb_reported_length_remaining(tvb, offset)>=4) {
428 proto_tree_add_item(parent_tree, hf_netmask,
429 tvb, offset, 4, FALSE);
433 case DVMRP_V3_ASK_NEIGHBORS:
434 case DVMRP_V3_NEIGHBORS:
435 /* XXX - obsolete, and the draft doesn't describe them */
437 case DVMRP_V3_ASK_NEIGHBORS_2:
440 case DVMRP_V3_NEIGHBORS_2:
441 /* XXX - fill this in */
450 dissect_dvmrp_v1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, int offset)
453 guint8 af=2; /* default */
456 proto_tree_add_uint(parent_tree, hf_version, tvb, 0, 0, 1);
458 /* type of command */
459 proto_tree_add_uint(parent_tree, hf_type, tvb, offset, 1, 0x13);
463 code = tvb_get_guint8(tvb, offset);
464 proto_tree_add_uint(parent_tree, hf_code_v1, tvb, offset, 1, code);
466 if (check_col(pinfo->cinfo, COL_INFO)) {
467 col_add_fstr(pinfo->cinfo, COL_INFO,
468 "V%d %s",1 ,val_to_str(code, code_v1,
469 "Unknown Type:0x%02x"));
473 igmp_checksum(parent_tree, tvb, hf_checksum, hf_checksum_bad, pinfo, 0);
476 /* decode all the v1 commands */
477 while (tvb_reported_length_remaining(tvb, offset)) {
481 int old_offset = offset;
483 item = proto_tree_add_item(parent_tree, hf_commands,
484 tvb, offset, -1, FALSE);
485 tree = proto_item_add_subtree(item, ett_commands);
487 cmd = tvb_get_guint8(tvb, offset);
488 proto_tree_add_uint(tree, hf_command, tvb,
493 case V1_COMMAND_NULL:
494 offset += 1; /* skip ignored/pad byte*/
496 proto_item_set_text(item, "Command: NULL");
500 af = tvb_get_guint8(tvb, offset);
501 proto_tree_add_uint(tree, hf_afi, tvb,
505 proto_item_set_text(item, "%s: %s",
506 val_to_str(cmd, command, "Unknown Command:0x%02x"),
507 val_to_str(af, afi, "Unknown Family:0x%02x")
511 case V1_COMMAND_SUBNETMASK:
512 count = tvb_get_guint8(tvb, offset);
513 proto_tree_add_uint(tree, hf_count, tvb,
516 if (count) { /* must be 0 or 1 */
517 proto_tree_add_item(tree, hf_netmask,
518 tvb, offset, 4, FALSE);
520 proto_item_set_text(item, "%s: %d.%d.%d.%d",
521 val_to_str(cmd, command, "Unknown Command:0x%02x"),
522 tvb_get_guint8(tvb, offset),
523 tvb_get_guint8(tvb, offset+1),
524 tvb_get_guint8(tvb, offset+2),
525 tvb_get_guint8(tvb, offset+3));
530 proto_item_set_text(item, "%s: <no mask supplied>",
531 val_to_str(cmd, command, "Unknown Command:0x%02x"));
535 case V1_COMMAND_METRIC:
536 proto_tree_add_item(tree, hf_metric, tvb,
539 proto_item_set_text(item, "%s: %d",
540 val_to_str(cmd, command, "Unknown Command:0x%02x"),
541 tvb_get_guint8(tvb, offset));
545 case V1_COMMAND_FLAGS0:
546 count = tvb_get_guint8(tvb, offset);
547 proto_tree_add_boolean(tree, hf_dest_unr, tvb, offset, 1, count);
548 proto_tree_add_boolean(tree, hf_split_horiz, tvb, offset, 1, count);
550 proto_item_set_text(item, "%s: 0x%02x",
551 val_to_str(cmd, command, "Unknown Command:0x%02x"), count);
555 case V1_COMMAND_INFINITY:
556 proto_tree_add_item(tree, hf_infinity, tvb,
559 proto_item_set_text(item, "%s: %d",
560 val_to_str(cmd, command, "Unknown Command:0x%02x"), tvb_get_guint8(tvb, offset));
565 case V1_COMMAND_RDA: /* same as DA */
566 count = tvb_get_guint8(tvb, offset);
567 proto_tree_add_uint(tree, hf_count, tvb,
571 proto_tree_add_item(tree, hf_daddr,
572 tvb, offset, 4, FALSE);
576 proto_item_set_text(item, "%s",
577 val_to_str(cmd, command, "Unknown Command:0x%02x"));
581 count = tvb_get_guint8(tvb, offset);
582 proto_tree_add_uint(tree, hf_count, tvb,
586 proto_tree_add_item(tree, hf_maddr,
587 tvb, offset, 4, FALSE);
589 proto_tree_add_item(tree, hf_hold, tvb,
594 proto_item_set_text(item, "%s",
595 val_to_str(cmd, command, "Unknown Command:0x%02x"));
598 case V1_COMMAND_NMR_CANCEL:
599 count = tvb_get_guint8(tvb, offset);
600 proto_tree_add_uint(tree, hf_count, tvb,
604 proto_tree_add_item(tree, hf_maddr,
605 tvb, offset, 4, FALSE);
609 proto_item_set_text(item, "%s",
610 val_to_str(cmd, command, "Unknown Command:0x%02x"));
615 proto_item_set_len(item, offset-old_offset);
621 /* This function is only called from the IGMP dissector */
623 dissect_dvmrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, int offset)
628 if (!proto_is_protocol_enabled(proto_dvmrp)) {
629 /* we are not enabled, skip entire packet to be nice
630 to the igmp layer. (so clicking on IGMP will display the data)
632 return offset+tvb_length_remaining(tvb, offset);
635 item = proto_tree_add_item(parent_tree, proto_dvmrp, tvb, offset, -1, FALSE);
636 tree = proto_item_add_subtree(item, ett_dvmrp);
639 if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
640 col_set_str(pinfo->cinfo, COL_PROTOCOL, "DVMRP");
642 if (check_col(pinfo->cinfo, COL_INFO)) {
643 col_clear(pinfo->cinfo, COL_INFO);
647 if ((tvb_length_remaining(tvb, offset)>=8)
648 && (tvb_get_guint8(tvb, 6)==0xff)
649 && (tvb_get_guint8(tvb, 7)==0x03)) {
650 offset = dissect_dvmrp_v3(tvb, pinfo, tree, offset);
651 proto_item_set_len(item, offset);
656 offset = dissect_dvmrp_v1(tvb, pinfo, tree, offset);
657 proto_item_set_len(item, offset);
662 proto_register_dvmrp(void)
664 static hf_register_info hf[] = {
666 { "DVMRP Version", "dvmrp.version", FT_UINT8, BASE_DEC,
667 NULL, 0, "DVMRP Version", HFILL }},
670 { "Type", "dvmrp.type", FT_UINT8, BASE_HEX,
671 VALS(dvmrp_type), 0, "DVMRP Packet Type", HFILL }},
674 { "Code", "dvmrp.v1.code", FT_UINT8, BASE_HEX,
675 VALS(code_v1), 0, "DVMRP Packet Code", HFILL }},
678 { "Checksum", "dvmrp.checksum", FT_UINT16, BASE_HEX,
679 NULL, 0, "DVMRP Checksum", HFILL }},
682 { "Bad Checksum", "dvmrp.checksum_bad", FT_BOOLEAN, BASE_NONE,
683 NULL, 0, "Bad DVMRP Checksum", HFILL }},
686 { "Commands", "dvmrp.commands", FT_NONE, BASE_NONE,
687 NULL, 0, "DVMRP V1 Commands", HFILL }},
690 { "Command", "dvmrp.command", FT_UINT8, BASE_HEX,
691 VALS(command), 0, "DVMRP V1 Command", HFILL }},
694 { "Address Family", "dvmrp.afi", FT_UINT8, BASE_HEX,
695 VALS(afi), 0, "DVMRP Address Family Indicator", HFILL }},
698 { "Count", "dvmrp.count", FT_UINT8, BASE_HEX,
699 NULL, 0, "Count", HFILL }},
702 { "Netmask", "igmp.netmask", FT_IPv4, BASE_NONE,
703 NULL, 0, "DVMRP Netmask", HFILL }},
706 { "Metric", "dvmrp.metric", FT_UINT8, BASE_DEC,
707 NULL, 0, "DVMRP Metric", HFILL }},
710 { "Destination Unreachable", "dvmrp.dest_unreach", FT_BOOLEAN, 8,
711 TFS(&tfs_dest_unreach), 0x01, "Destination Unreachable", HFILL }},
714 { "Split Horizon", "dvmrp.split_horiz", FT_BOOLEAN, 8,
715 TFS(&tfs_split_horiz), 0x02, "Split Horizon concealed route", HFILL }},
718 { "Infinity", "dvmrp.infinity", FT_UINT8, BASE_DEC,
719 NULL, 0, "DVMRP Infinity", HFILL }},
722 { "Dest Addr", "igmp.daddr", FT_IPv4, BASE_NONE,
723 NULL, 0, "DVMRP Destination Address", HFILL }},
726 { "Multicast Addr", "igmp.maddr", FT_IPv4, BASE_NONE,
727 NULL, 0, "DVMRP Multicast Address", HFILL }},
730 { "Hold Time", "dvmrp.hold", FT_UINT32, BASE_DEC,
731 NULL, 0, "DVMRP Hold Time in seconds", HFILL }},
734 { "Code", "dvmrp.v3.code", FT_UINT8, BASE_HEX,
735 VALS(code_v3), 0, "DVMRP Packet Code", HFILL }},
738 { "Capabilities", "dvmrp.capabilities", FT_NONE, BASE_NONE,
739 NULL, 0, "DVMRP V3 Capabilities", HFILL }},
742 { "Leaf", "dvmrp.cap.leaf", FT_BOOLEAN, 8,
743 TFS(&tfs_cap_leaf), DVMRP_V3_CAP_LEAF, "Leaf", HFILL }},
746 { "Prune", "dvmrp.cap.prune", FT_BOOLEAN, 8,
747 TFS(&tfs_cap_prune), DVMRP_V3_CAP_PRUNE, "Prune capability", HFILL }},
750 { "Genid", "dvmrp.cap.genid", FT_BOOLEAN, 8,
751 TFS(&tfs_cap_genid), DVMRP_V3_CAP_GENID, "Genid capability", HFILL }},
754 { "Mtrace", "dvmrp.cap.mtrace", FT_BOOLEAN, 8,
755 TFS(&tfs_cap_mtrace), DVMRP_V3_CAP_MTRACE, "Mtrace capability", HFILL }},
758 { "SNMP", "dvmrp.cap.snmp", FT_BOOLEAN, 8,
759 TFS(&tfs_cap_snmp), DVMRP_V3_CAP_SNMP, "SNMP capability", HFILL }},
762 { "Netmask", "dvmrp.cap.netmask", FT_BOOLEAN, 8,
763 TFS(&tfs_cap_netmask), DVMRP_V3_CAP_NETMASK, "Netmask capability", HFILL }},
766 { "Minor Version", "dvmrp.min_ver", FT_UINT8, BASE_HEX,
767 NULL, 0, "DVMRP Minor Version", HFILL }},
770 { "Major Version", "dvmrp.maj_ver", FT_UINT8, BASE_HEX,
771 NULL, 0, "DVMRP Major Version", HFILL }},
774 { "Generation ID", "dvmrp.genid", FT_UINT32, BASE_DEC,
775 NULL, 0, "DVMRP Generation ID", HFILL }},
778 { "Route", "dvmrp.route", FT_NONE, BASE_NONE,
779 NULL, 0, "DVMRP V3 Route Report", HFILL }},
782 { "Source Addr", "igmp.saddr", FT_IPv4, BASE_NONE,
783 NULL, 0, "DVMRP Source Address", HFILL }},
786 { "Prune lifetime", "dvmrp.lifetime", FT_UINT32, BASE_DEC,
787 NULL, 0, "DVMRP Prune Lifetime", HFILL }},
790 { "Neighbor Addr", "igmp.neighbor", FT_IPv4, BASE_NONE,
791 NULL, 0, "DVMRP Neighbor Address", HFILL }},
794 static gint *ett[] = {
801 proto_dvmrp = proto_register_protocol("Distance Vector Multicast Routing Protocol",
803 proto_register_field_array(proto_dvmrp, hf, array_length(hf));
804 proto_register_subtree_array(ett, array_length(ett));