2 * Routines for ldp packet disassembly
4 * $Id: packet-ldp.c,v 1.19 2001/07/21 10:27:12 guy Exp $
6 * Copyright (c) November 2000 by Richard Sharpe <rsharpe@ns.aus.com>
8 * Ethereal - Network traffic analyzer
10 * Copyright 1999 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.
30 #ifdef HAVE_SYS_TYPES_H
31 # include <sys/types.h>
34 #ifdef HAVE_NETINET_IN_H
35 #include <netinet/in.h>
49 #define TCP_PORT_LDP 646
50 #define UDP_PORT_LDP 646
52 void proto_reg_handoff_ldp(void);
54 static int proto_ldp = -1;
56 /* Delete the following if you do not use it, or add to it if you need */
57 static int hf_ldp_req = -1;
58 static int hf_ldp_rsp = -1;
59 static int hf_ldp_version = -1;
60 static int hf_ldp_pdu_len = -1;
61 static int hf_ldp_lsr = -1;
62 static int hf_ldp_ls_id = -1;
63 static int hf_ldp_msg_type = -1;
64 static int hf_ldp_msg_len = -1;
65 static int hf_ldp_msg_id = -1;
66 static int hf_ldp_tlv_value = -1;
67 static int hf_ldp_tlv_type = -1;
68 static int hf_ldp_tlv_len = -1;
69 static int hf_ldp_tlv_val_hold = -1;
70 static int hf_ldp_tlv_val_target = -1;
71 static int hf_ldp_tlv_val_request = -1;
72 static int hf_ldp_tlv_val_res = -1;
73 static int hf_ldp_tlv_config_seqno = -1;
74 static int hf_ldp_tlv_fec_wc = -1;
75 static int hf_ldp_tlv_fec_af = -1;
76 static int hf_ldp_tlv_fec_len = -1;
77 static int hf_ldp_tlv_fec_pfval = -1;
78 static int hf_ldp_tlv_generic_label = -1;
80 static int ett_ldp = -1;
81 static int ett_ldp_header = -1;
82 static int ett_ldp_ldpid = -1;
83 static int ett_ldp_message = -1;
84 static int ett_ldp_tlv = -1;
85 static int ett_ldp_tlv_val = -1;
86 static int ett_ldp_fec = -1;
88 static int tcp_port = 0;
89 static int udp_port = 0;
91 /* Add your functions here */
93 static int global_ldp_tcp_port = TCP_PORT_LDP;
94 static int global_ldp_udp_port = UDP_PORT_LDP;
97 * The following define all the TLV types I know about
100 #define TLV_FEC 0x0100
101 #define TLV_ADDRESS_LIST 0x0101
102 #define TLV_HOP_COUNT 0x0103
103 #define TLV_PATH_VECTOR 0x0104
104 #define TLV_GENERIC_LABEL 0x0200
105 #define TLV_ATM_LABEL 0x0201
106 #define TLV_FRAME_LABEL 0x0202
107 #define TLV_STATUS 0x0300
108 #define TLV_EXTENDED_STATUS 0x0301
109 #define TLV_RETURNED_PDU 0x0302
110 #define TLV_RETURNED_MESSAGE 0x0303
111 #define TLV_COMMON_HELLO_PARMS 0x0400
112 #define TLV_IPV4_TRANSPORT_ADDRESS 0x0401
113 #define TLV_CONFIGURATION_SEQNO 0x0402
114 #define TLV_IPV6_TRANSPORT_ADDRESS 0x0403
115 #define TLV_COMMON_SESSION_PARMS 0x0500
116 #define TLV_ATM_SESSION_PARMS 0x0501
117 #define TLV_FRAME_RELAY_SESSION_PARMS 0x0502
118 #define TLV_LABEL_REQUEST_MESSAGE_ID 0x0600
120 #define TLV_VENDOR_PRIVATE_START 0x3E00
121 #define TLV_VENDOR_PROVATE_END 0x3EFF
122 #define TLV_EXPERIMENTAL_START 0x3F00
123 #define TLV_EXPERIMENTAL_END 0x3FFF
125 static const value_string tlv_type_names[] = {
126 { TLV_FEC, "Forwarding Equivalence Classes" },
127 { TLV_ADDRESS_LIST, "Address List"},
128 { TLV_HOP_COUNT, "Hop Count"},
129 { TLV_PATH_VECTOR, "Path Vector"},
130 { TLV_GENERIC_LABEL, "Generic Label"},
131 { TLV_ATM_LABEL, "Frame Label"},
132 { TLV_STATUS, "Status"},
133 { TLV_EXTENDED_STATUS, "Extended Status"},
134 { TLV_RETURNED_PDU, "Returned PDU"},
135 { TLV_RETURNED_MESSAGE, "Returned Message"},
136 { TLV_COMMON_HELLO_PARMS, "Common Hello Parameters"},
137 { TLV_IPV4_TRANSPORT_ADDRESS, "IPv4 Transport Address"},
138 { TLV_CONFIGURATION_SEQNO, "Configuration Sequence Number"},
139 { TLV_IPV6_TRANSPORT_ADDRESS, "IPv6 Transport Address"},
140 { TLV_COMMON_SESSION_PARMS, "Common Session Parameters"},
141 { TLV_ATM_SESSION_PARMS, "ATM Session Parameters"},
142 { TLV_FRAME_RELAY_SESSION_PARMS, "Frame Relay Session Parameters"},
143 { TLV_LABEL_REQUEST_MESSAGE_ID, "Label Request Message ID"},
148 * The following define all the message types I know about
151 #define LDP_NOTIFICATION 0x0001
152 #define LDP_HELLO 0x0100
153 #define LDP_INITIALIZATION 0x0200
154 #define LDP_KEEPALIVE 0x0201
155 #define LDP_ADDRESS 0x0300
156 #define LDP_ADDRESS_WITHDRAWAL 0x0301
157 #define LDP_LABEL_MAPPING 0x0400
158 #define LDP_LABEL_REQUEST 0x0401
159 #define LDP_LABEL_WITHDRAWAL 0x0402
160 #define LDP_LABEL_RELEASE 0x0403
161 #define LDP_LABEL_ABORT_REQUEST 0x0404
162 #define LDP_VENDOR_PRIVATE_START 0x3E00
163 #define LDP_VENDOR_PRIVATE_END 0x3EFF
164 #define LDP_EXPERIMENTAL_MESSAGE_START 0x3F00
165 #define LDP_EXPERIMENTAL_MESSAGE_END 0x3FFF
167 static const value_string ldp_message_types[] = {
168 {LDP_NOTIFICATION, "Notification"},
169 {LDP_HELLO, "Hello"},
170 {LDP_INITIALIZATION, "Initialization"},
171 {LDP_KEEPALIVE, "Keep Alive"},
172 {LDP_ADDRESS, "Address"},
173 {LDP_ADDRESS_WITHDRAWAL, "Address Withdrawal"},
174 {LDP_LABEL_MAPPING, "Label Mapping"},
175 {LDP_LABEL_REQUEST, "Label Request"},
176 {LDP_LABEL_WITHDRAWAL, "Label Withdrawal"},
177 {LDP_LABEL_RELEASE, "Label Release"},
178 {LDP_LABEL_ABORT_REQUEST, "Label Abort Request"},
182 static const true_false_string hello_targeted_vals = {
187 static const value_string fec_types[] = {
190 {3, "Host Address FEC"},
194 static const true_false_string hello_requested_vals = {
195 "Source requests periodic hellos",
196 "Source does not request periodic hellos"
199 /* Dissect the common hello params */
201 void dissect_tlv_common_hello_parms(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
203 proto_tree *ti = NULL, *val_tree = NULL;
207 ti = proto_tree_add_item(tree, hf_ldp_tlv_value, tvb, offset, rem,
210 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
212 proto_tree_add_item(val_tree, hf_ldp_tlv_val_hold, tvb, offset, 2, FALSE);
214 proto_tree_add_boolean(val_tree, hf_ldp_tlv_val_target, tvb, offset + 2, 2, FALSE);
215 proto_tree_add_boolean(val_tree, hf_ldp_tlv_val_request, tvb, offset + 2, 2, FALSE);
216 proto_tree_add_item(val_tree, hf_ldp_tlv_val_res, tvb, offset + 2, 2, FALSE);
221 /* Dissect a TLV and return the number of bytes consumed ... */
223 int dissect_tlv(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
225 guint16 message = tvb_get_ntohs(tvb, offset),
226 length = tvb_get_ntohs(tvb, offset + 2),
227 pad = 0, fec_len = 0;
228 proto_tree *ti = NULL, *tlv_tree = NULL;
230 /* Hmmm, check for illegal alignment padding */
232 if (message == 0x00) {
234 proto_tree_add_text(tree, tvb, offset, 2, "Illegal Padding: %04X", message);
235 offset += 2; pad = 2;
236 message = tvb_get_ntohs(tvb, offset);
237 length = tvb_get_ntohs(tvb, offset + 2);
241 length = MIN(length, rem); /* Don't go haywire if a problem ... */
245 /* FIXME: Account for vendor and special messages */
247 ti = proto_tree_add_text(tree, tvb, offset, length + 4, "%s",
248 val_to_str(message, tlv_type_names, "Unknown TLV type (0x%04X)"));
250 tlv_tree = proto_item_add_subtree(ti, ett_ldp_tlv);
252 proto_tree_add_item(tlv_tree, hf_ldp_tlv_type, tvb, offset, 2, FALSE);
254 proto_tree_add_item(tlv_tree, hf_ldp_tlv_len, tvb, offset + 2, 2, FALSE);
258 case TLV_FEC: /* Process an FEC */
260 offset += 4; /* Skip the TLV header */
264 while (fec_len > 0) {
265 proto_tree *fec_tree = NULL;
266 guint prefix_len_octets, prefix_len, prefix;
269 switch (tvb_get_guint8(tvb, offset)) {
270 case 1: /* Wild Card */
272 proto_tree_add_item(tlv_tree, hf_ldp_tlv_fec_wc, tvb, offset, 4, FALSE);
281 /* Add a subtree for this ... */
283 ti = proto_tree_add_text(tlv_tree, tvb, offset, 8, "Prefix FEC Element");
285 fec_tree = proto_item_add_subtree(ti, ett_ldp_fec);
287 proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_wc, tvb, offset, 1, FALSE);
291 /* XXX - the address family length should be extracted and used to
292 dissect the prefix field. */
293 proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_af, tvb, offset, 2, FALSE);
296 prefix_len = tvb_get_guint8(tvb, offset);
297 proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_len, tvb, offset, 1, FALSE);
300 /* This is IPv4 specific. Should do IPv6 according to AF*/
301 prefix_len_octets = MIN( (prefix_len+7)/8 , 4 );
302 if (prefix_len > 32) {
303 proto_tree_add_text(fec_tree, tvb, offset, 0,
304 "Invalid prefix %u length, guessing 32", prefix_len);
305 prefix_len_octets = 4;
307 switch (prefix_len_octets){
308 case (0): /*prefix_length=0*/
311 case (1): /*1<=prefix_length<=8*/
312 prefix = tvb_get_guint8(tvb, offset);
314 case (2): /*9<=prefix_length<=16*/
315 prefix = tvb_get_letohs(tvb, offset);
317 case (3): /*17<=prefix_length<=24*/
318 prefix = tvb_get_letoh24(tvb, offset);
320 case (4): /*25<=prefix_length<=32*/
321 prefix = tvb_get_letohl(tvb, offset);
323 default: /*prefix_length>32*/
324 g_assert_not_reached();
328 proto_tree_add_ipv4(fec_tree, hf_ldp_tlv_fec_pfval, tvb,
329 offset, prefix_len_octets, prefix);
330 fec_len -= 4+prefix_len_octets;
333 case 3: /* Host address */
335 /* XXX - write me. */
343 default: /* Unknown */
345 /* XXX - do all FEC's have a length that's a multiple of 4? */
346 /* Hmmm, don't think so. Will check. RJS. */
360 case TLV_GENERIC_LABEL:
362 proto_tree_add_item(tlv_tree, hf_ldp_tlv_generic_label, tvb, offset + 4, 4, FALSE);
366 case TLV_COMMON_HELLO_PARMS:
368 dissect_tlv_common_hello_parms(tvb, offset + 4, tlv_tree, length);
371 case TLV_CONFIGURATION_SEQNO:
373 proto_tree_add_item(tlv_tree, hf_ldp_tlv_config_seqno, tvb, offset + 4, 4, FALSE);
377 proto_tree_add_item(tlv_tree, hf_ldp_tlv_value, tvb, offset + 4,
385 return length + pad + 4; /* Length of the value field + header */
390 * Each of these routines dissect the relevant messages, but the msg header
391 * has already been dissected.
395 dissect_ldp_notification(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
397 guint rem = length, cc = 0;
401 rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
408 /* Dissect a Hello Message ... */
410 dissect_ldp_hello(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
412 guint rem = length, cc = 0;
416 rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
424 dissect_ldp_initialization(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
426 guint rem = length, cc = 0;
430 rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
438 dissect_ldp_keepalive(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
440 guint rem = length, cc = 0;
444 rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
452 dissect_ldp_address(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
454 guint rem = length, cc = 0;
458 rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
466 dissect_ldp_address_withdrawal(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
468 guint rem = length, cc = 0;
472 rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
480 dissect_ldp_label_mapping(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
482 guint rem = length, cc = 0;
486 rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
494 dissect_ldp_label_request(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
496 guint rem = length, cc = 0;
500 rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
508 dissect_ldp_label_withdrawal(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
510 guint rem = length, cc = 0;
514 rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
522 dissect_ldp_label_release(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
524 guint rem = length, cc = 0;
528 rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
536 dissect_ldp_label_abort_request(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree, guint length)
538 guint rem = length, cc = 0;
542 rem -= (cc = dissect_tlv(tvb, offset, tree, rem));
550 dissect_ldp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
552 proto_tree *ldp_tree = NULL,
554 *hdr_tree = NULL, *ldpid_tree = NULL;
555 int offset = 0, msg_cnt = 0;
556 guint16 ldp_message = 0;
558 if (check_col(pinfo->fd, COL_PROTOCOL))
559 col_add_str(pinfo->fd, COL_PROTOCOL, "LDP");
560 if (check_col(pinfo->fd, COL_INFO))
561 col_clear(pinfo->fd, COL_INFO);
563 if (tree) { /* Build the tree info ..., this is wrong! FIXME */
565 ti = proto_tree_add_item(tree, proto_ldp, tvb, offset,
566 tvb_length_remaining(tvb, offset), FALSE);
567 ldp_tree = proto_item_add_subtree(ti, ett_ldp);
569 ti = proto_tree_add_text(ldp_tree, tvb, 0, 10, "Header");
571 hdr_tree = proto_item_add_subtree(ti, ett_ldp_header);
573 proto_tree_add_item(hdr_tree, hf_ldp_version, tvb, offset, 2, FALSE);
577 proto_tree_add_item(hdr_tree, hf_ldp_pdu_len, tvb, offset, 2, FALSE);
581 ti = proto_tree_add_text(hdr_tree, tvb, offset, 6, "LDP Identifier");
583 ldpid_tree = proto_item_add_subtree(ti, ett_ldp_ldpid);
585 proto_tree_add_item(ldpid_tree, hf_ldp_lsr, tvb, offset, 4, FALSE);
589 proto_tree_add_item(ldpid_tree, hf_ldp_ls_id, tvb, offset, 2, FALSE);
597 while (tvb_length_remaining(tvb, offset) > 0) { /* Dissect a message */
601 ldp_message = tvb_get_ntohs(tvb, offset) & 0x7FFF; /* Get the message type */
603 msg_len = tvb_get_ntohs(tvb, offset + 2);
605 if (check_col(pinfo->fd, COL_INFO)) { /* Check the type ... */
608 col_append_fstr(pinfo->fd, COL_INFO, ", %s",
609 val_to_str(ldp_message, ldp_message_types, "Unknown Message (0x%04X)"));
611 col_add_fstr(pinfo->fd, COL_INFO, "%s",
612 val_to_str(ldp_message, ldp_message_types, "Unknown Message (0x%04X)"));
620 proto_tree *ti = NULL, *msg_tree = NULL;
622 /* FIXME: Account for vendor and experimental messages */
624 ti = proto_tree_add_text(ldp_tree, tvb, offset, msg_len + 4, "%s",
625 val_to_str(ldp_message, ldp_message_types, "Unknown Message (0x%04X)"));
627 msg_tree = proto_item_add_subtree(ti, ett_ldp_message);
629 proto_tree_add_item(msg_tree, hf_ldp_msg_type, tvb, offset, 2, FALSE);
631 proto_tree_add_item(msg_tree, hf_ldp_msg_len, tvb, offset + 2, 2, FALSE);
633 proto_tree_add_item(msg_tree, hf_ldp_msg_id, tvb, offset + 4, 4, FALSE);
635 switch (ldp_message) {
637 case LDP_NOTIFICATION:
639 dissect_ldp_notification(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
645 dissect_ldp_hello(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
649 case LDP_INITIALIZATION:
651 dissect_ldp_initialization(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
657 dissect_ldp_keepalive(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
663 dissect_ldp_address(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
667 case LDP_ADDRESS_WITHDRAWAL:
669 dissect_ldp_address_withdrawal(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
673 case LDP_LABEL_MAPPING:
675 dissect_ldp_label_mapping(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
679 case LDP_LABEL_REQUEST:
681 dissect_ldp_label_request(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
685 case LDP_LABEL_WITHDRAWAL:
687 dissect_ldp_label_withdrawal(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
691 case LDP_LABEL_RELEASE:
693 dissect_ldp_label_release(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
697 case LDP_LABEL_ABORT_REQUEST:
699 dissect_ldp_label_abort_request(tvb, offset + 8, pinfo, msg_tree, msg_len - 4);
705 /* Some sort of unknown message, treat as undissected data */
713 offset += msg_len + 4;
718 /* Register all the bits needed with the filtering engine */
721 proto_register_ldp(void)
723 static hf_register_info hf[] = {
725 /* Change the following to the type you need */
726 { "Request", "ldp.req", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "", HFILL }},
729 { "Response", "ldp.rsp", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "", HFILL }},
732 { "Version", "ldp.hdr.version", FT_UINT16, BASE_DEC, NULL, 0x0, "LDP Version Number", HFILL }},
735 { "PDU Length", "ldp.hdr.pdu_len", FT_UINT16, BASE_DEC, NULL, 0x0, "LDP PDU Length", HFILL }},
738 { "LSR ID", "ldp.hdr.ldpid.lsr", FT_UINT32, BASE_HEX, NULL, 0x0, "LDP Label Space Router ID", HFILL }},
741 { "Label Space ID", "ldp.hdr.ldpid.lsid", FT_UINT16, BASE_HEX, NULL, 0x0, "LDP Label Space ID", HFILL }},
744 { "Message Type", "ldp.msg.type", FT_UINT16, BASE_HEX, VALS(ldp_message_types), 0x0, "LDP message type", HFILL }},
747 { "Message Length", "ldp.msg.len", FT_UINT16, BASE_DEC, NULL, 0x0, "LDP Message Length (excluding message type and len)", HFILL }},
750 { "Message ID", "ldp.msg.id", FT_UINT32, BASE_HEX, NULL, 0x0, "LDP Message ID", HFILL }},
753 { "TLV Type", "ldp.msg.tlv.type", FT_UINT16, BASE_HEX, VALS(tlv_type_names), 0x0, "TLV Type Field", HFILL }},
756 {"TLV Length", "ldp.msg.tlv.len", FT_UINT16, BASE_DEC, NULL, 0x0, "TLV Length Field", HFILL }},
759 { "TLV Value", "ldp.msg.tlv.value", FT_BYTES, BASE_NONE, NULL, 0x0, "TLV Value Bytes", HFILL }},
761 { &hf_ldp_tlv_val_hold,
762 { "Hold Time", "ldp.msg.tlv.hello.hold", FT_UINT16, BASE_DEC, NULL, 0x0, "Hello Common Parameters Hold Time", HFILL }},
764 { &hf_ldp_tlv_val_target,
765 { "Targeted Hello", "ldp.msg.tlv.hello.targeted", FT_BOOLEAN, 8, TFS(&hello_targeted_vals), 0x80, "Hello Common Parameters Targeted Bit", HFILL }},
767 { &hf_ldp_tlv_val_request,
768 { "Hello Requested", "ldp,msg.tlv.hello.requested", FT_BOOLEAN, 8, TFS(&hello_requested_vals), 0x40, "Hello Common Parameters Hello Requested Bit", HFILL }},
770 { &hf_ldp_tlv_val_res,
771 { "Reserved", "ldp.msg.tlv.hello.res", FT_UINT16, BASE_HEX, NULL, 0x3FFF, "Hello Common Parameters Reserved Field", HFILL }},
773 { &hf_ldp_tlv_config_seqno,
774 { "Configuration Sequence Number", "ldp.msg.tlv.hello.cnf_seqno", FT_UINT32, BASE_HEX, NULL, 0x0, "Hello COnfiguration Sequence Number", HFILL }},
776 { &hf_ldp_tlv_fec_wc,
777 { "FEC Element Type", "ldp.msg.tlv.fec.type", FT_UINT8, BASE_DEC, VALS(fec_types), 0x0, "Forwarding Equivalence Class Element Types", HFILL }},
779 { &hf_ldp_tlv_fec_af,
780 { "FEC Element Address Type", "ldp.msg.tlv.fec.af", FT_UINT16, BASE_DEC, VALS(afn_vals), 0x0, "Forwarding Equivalence Class Element Address Family", HFILL }},
782 { &hf_ldp_tlv_fec_len,
783 { "FEC Element Length", "ldp.msg.tlv.fec.len", FT_UINT8, BASE_DEC, NULL, 0x0, "Forwarding Equivalence Class Element Length", HFILL }},
785 { &hf_ldp_tlv_fec_pfval,
786 { "FEC Element Prefix Value", "ldp.msg.tlv.fec.pfval", FT_IPv4, BASE_DEC, NULL, 0x0, "Forwarding Equivalence Class Element Prefix", HFILL }},
788 { &hf_ldp_tlv_generic_label,
789 { "Generic Label", "ldp.msg.tlv.label", FT_UINT32, BASE_HEX, NULL, 0x0, "Label Mapping Generic Label", HFILL }},
792 static gint *ett[] = {
801 module_t *ldp_module;
803 proto_ldp = proto_register_protocol("Label Distribution Protocol",
806 proto_register_field_array(proto_ldp, hf, array_length(hf));
807 proto_register_subtree_array(ett, array_length(ett));
809 /* Register our configuration options for , particularly our port */
811 ldp_module = prefs_register_protocol(proto_ldp, proto_reg_handoff_ldp);
813 prefs_register_uint_preference(ldp_module, "tcp.port", "LDP TCP Port",
814 "Set the port for messages (if other"
815 " than the default of 646)",
816 10, &global_ldp_tcp_port);
818 prefs_register_uint_preference(ldp_module, "udp.port", "LDP UDP Port",
819 "Set the port for messages (if other"
820 " than the default of 646)",
821 10, &global_ldp_udp_port);
825 /* The registration hand-off routine */
827 proto_reg_handoff_ldp(void)
829 static int ldp_prefs_initialized = FALSE;
831 if (ldp_prefs_initialized) {
833 dissector_delete("tcp.port", tcp_port, dissect_ldp);
834 dissector_delete("udp.port", udp_port, dissect_ldp);
839 ldp_prefs_initialized = TRUE;
843 /* Set our port number for future use */
845 tcp_port = global_ldp_tcp_port;
846 udp_port = global_ldp_udp_port;
848 dissector_add("tcp.port", global_ldp_tcp_port, dissect_ldp, proto_ldp);
849 dissector_add("udp.port", global_ldp_udp_port, dissect_ldp, proto_ldp);