packet-ldp.c

   1 /* packet-ldp.c
   2  * Routines for LDP (RFC 3036) packet disassembly
   3  *
   4  * $Id: packet-ldp.c,v 1.38 2002/04/29 08:20:08 guy Exp $
   5  *
   6  * Copyright (c) November 2000 by Richard Sharpe <rsharpe@ns.aus.com>
   7  *
   8  * CRLDP (RFC3212) is now supported
   9  *   - (c) 2002 Michael Rozhavsky <mike[AT]tochna.technion.ac.il>
  10  *
  11  * Ethereal - Network traffic analyzer
  12  * By Gerald Combs <gerald@ethereal.com>
  13  * Copyright 1999 Gerald Combs
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  28  */
  29
  30 #ifdef HAVE_CONFIG_H
  31 #include "config.h"
  32 #endif
  33
  34 #ifdef HAVE_SYS_TYPES_H
  35 # include <sys/types.h>
  36 #endif
  37
  38 #ifdef HAVE_NETINET_IN_H
  39 #include <netinet/in.h>
  40 #endif
  41
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <ctype.h>
  45 #include <time.h>
  46 #include <glib.h>
  47 #include <string.h>
  48 #include <epan/packet.h>
  49 #include <epan/resolv.h>
  50 #include "prefs.h"
  51 #include "afn.h"
  52
  53 #include "packet-frame.h"
  54
  55 #define TCP_PORT_LDP 646
  56 #define UDP_PORT_LDP 646
  57
  58 void proto_reg_handoff_ldp(void);
  59
  60 static int proto_ldp = -1;
  61
  62 /* Delete the following if you do not use it, or add to it if you need */
  63 static int hf_ldp_req = -1;
  64 static int hf_ldp_rsp = -1;
  65 static int hf_ldp_version = -1;
  66 static int hf_ldp_pdu_len = -1;
  67 static int hf_ldp_lsr = -1;
  68 static int hf_ldp_ls_id = -1;
  69 static int hf_ldp_msg_ubit = -1;
  70 static int hf_ldp_msg_type = -1;
  71 static int hf_ldp_msg_len = -1;
  72 static int hf_ldp_msg_id = -1;
  73 static int hf_ldp_msg_vendor_id = -1;
  74 static int hf_ldp_msg_experiment_id = -1;
  75 static int hf_ldp_tlv_value = -1;
  76 static int hf_ldp_tlv_type = -1;
  77 static int hf_ldp_tlv_unknown = -1;
  78 static int hf_ldp_tlv_len = -1;
  79 static int hf_ldp_tlv_val_hold = -1;
  80 static int hf_ldp_tlv_val_target = -1;
  81 static int hf_ldp_tlv_val_request = -1;
  82 static int hf_ldp_tlv_val_res = -1;
  83 static int hf_ldp_tlv_ipv4_taddr = -1;
  84 static int hf_ldp_tlv_config_seqno = -1;
  85 static int hf_ldp_tlv_ipv6_taddr = -1;
  86 static int hf_ldp_tlv_fec_wc = -1;
  87 static int hf_ldp_tlv_fec_af = -1;
  88 static int hf_ldp_tlv_fec_len = -1;
  89 static int hf_ldp_tlv_fec_pfval = -1;
  90 static int hf_ldp_tlv_fec_hoval = -1;
  91 static int hf_ldp_tlv_addrl_addr_family = -1;
  92 static int hf_ldp_tlv_addrl_addr = -1;
  93 static int hf_ldp_tlv_hc_value = -1;
  94 static int hf_ldp_tlv_pv_lsrid = -1;
  95 static int hf_ldp_tlv_generic_label = -1;
  96 static int hf_ldp_tlv_atm_label_vbits = -1;
  97 static int hf_ldp_tlv_atm_label_vpi = -1;
  98 static int hf_ldp_tlv_atm_label_vci = -1;
  99 static int hf_ldp_tlv_fr_label_len = -1;
 100 static int hf_ldp_tlv_fr_label_dlci = -1;
 101 static int hf_ldp_tlv_status_ebit = -1;
 102 static int hf_ldp_tlv_status_fbit = -1;
 103 static int hf_ldp_tlv_status_data = -1;
 104 static int hf_ldp_tlv_status_msg_id = -1;
 105 static int hf_ldp_tlv_status_msg_type = -1;
 106 static int hf_ldp_tlv_extstatus_data = -1;
 107 static int hf_ldp_tlv_returned_version = -1;
 108 static int hf_ldp_tlv_returned_pdu_len = -1;
 109 static int hf_ldp_tlv_returned_lsr = -1;
 110 static int hf_ldp_tlv_returned_ls_id = -1;
 111 static int hf_ldp_tlv_returned_msg_ubit = -1;
 112 static int hf_ldp_tlv_returned_msg_type = -1;
 113 static int hf_ldp_tlv_returned_msg_len = -1;
 114 static int hf_ldp_tlv_returned_msg_id = -1;
 115 static int hf_ldp_tlv_sess_ver = -1;
 116 static int hf_ldp_tlv_sess_ka = -1;
 117 static int hf_ldp_tlv_sess_advbit = -1;
 118 static int hf_ldp_tlv_sess_ldetbit = -1;
 119 static int hf_ldp_tlv_sess_pvlim = -1;
 120 static int hf_ldp_tlv_sess_mxpdu = -1;
 121 static int hf_ldp_tlv_sess_rxlsr = -1;
 122 static int hf_ldp_tlv_sess_rxls = -1;
 123 static int hf_ldp_tlv_sess_atm_merge = -1;
 124 static int hf_ldp_tlv_sess_atm_lr = -1;
 125 static int hf_ldp_tlv_sess_atm_dir = -1;
 126 static int hf_ldp_tlv_sess_atm_minvpi = -1;
 127 static int hf_ldp_tlv_sess_atm_maxvpi = -1;
 128 static int hf_ldp_tlv_sess_atm_minvci = -1;
 129 static int hf_ldp_tlv_sess_atm_maxvci = -1;
 130 static int hf_ldp_tlv_sess_fr_merge = -1;
 131 static int hf_ldp_tlv_sess_fr_lr = -1;
 132 static int hf_ldp_tlv_sess_fr_dir = -1;
 133 static int hf_ldp_tlv_sess_fr_len = -1;
 134 static int hf_ldp_tlv_sess_fr_mindlci = -1;
 135 static int hf_ldp_tlv_sess_fr_maxdlci = -1;
 136 static int hf_ldp_tlv_lbl_req_msg_id = -1;
 137 static int hf_ldp_tlv_vendor_id = -1;
 138 static int hf_ldp_tlv_experiment_id = -1;
 139 static int hf_ldp_tlv_fec_vc_controlword = -1;
 140 static int hf_ldp_tlv_fec_vc_vctype = -1;
 141 static int hf_ldp_tlv_fec_vc_infolength = -1;
 142 static int hf_ldp_tlv_fec_vc_groupid = -1;
 143 static int hf_ldp_tlv_fec_vc_vcid = -1;
 144 static int hf_ldp_tlv_fec_vc_intparam_length = -1;
 145 static int hf_ldp_tlv_fec_vc_intparam_mtu = -1;
 146 static int hf_ldp_tlv_fec_vc_intparam_id = -1;
 147 static int hf_ldp_tlv_fec_vc_intparam_maxcatmcells = -1;
 148 static int hf_ldp_tlv_fec_vc_intparam_desc = -1;
 149 static int hf_ldp_tlv_fec_vc_intparam_cembytes = -1;
 150 static int hf_ldp_tlv_lspid_act_flg = -1;
 151 static int hf_ldp_tlv_lspid_cr_lsp = -1;
 152 static int hf_ldp_tlv_lspid_ldpid = -1;
 153 static int hf_ldp_tlv_er_hop_loose = -1;
 154 static int hf_ldp_tlv_er_hop_prelen = -1;
 155 static int hf_ldp_tlv_er_hop_prefix4 = -1;
 156 static int hf_ldp_tlv_er_hop_prefix6 = -1;
 157 static int hf_ldp_tlv_er_hop_as = -1;
 158 static int hf_ldp_tlv_er_hop_cr_lsp = -1;
 159 static int hf_ldp_tlv_er_hop_ldpid = -1;
 160 static int hf_ldp_tlv_flags_reserv = -1;
 161 static int hf_ldp_tlv_flags_weight = -1;
 162 static int hf_ldp_tlv_flags_ebs = -1;
 163 static int hf_ldp_tlv_flags_cbs = -1;
 164 static int hf_ldp_tlv_flags_cdr = -1;
 165 static int hf_ldp_tlv_flags_pbs = -1;
 166 static int hf_ldp_tlv_flags_pdr = -1;
 167 static int hf_ldp_tlv_frequency = -1;
 168 static int hf_ldp_tlv_pdr = -1;
 169 static int hf_ldp_tlv_pbs = -1;
 170 static int hf_ldp_tlv_cdr = -1;
 171 static int hf_ldp_tlv_cbs = -1;
 172 static int hf_ldp_tlv_ebs = -1;
 173 static int hf_ldp_tlv_weight = -1;
 174 static int hf_ldp_tlv_set_prio = -1;
 175 static int hf_ldp_tlv_hold_prio = -1;
 176 static int hf_ldp_tlv_route_pinning = -1;
 177 static int hf_ldp_tlv_resource_class = -1;
 178 static int ett_ldp = -1;
 179 static int ett_ldp_header = -1;
 180 static int ett_ldp_ldpid = -1;
 181 static int ett_ldp_message = -1;
 182 static int ett_ldp_tlv = -1;
 183 static int ett_ldp_tlv_val = -1;
 184 static int ett_ldp_fec = -1;
 185 static int ett_ldp_fec_vc_interfaceparam = -1;
 186
 187 static int tcp_port = 0;
 188 static int udp_port = 0;
 189
 190 /* desegmentation of LDP over TCP */
 191 static gboolean ldp_desegment = FALSE;
 192
 193 /* Add your functions here */
 194
 195 static int global_ldp_tcp_port = TCP_PORT_LDP;
 196 static int global_ldp_udp_port = UDP_PORT_LDP;
 197
 198 /*
 199  * The following define all the TLV types I know about
 200  */
 201
 202 #define TLV_FEC                    0x0100
 203 #define TLV_ADDRESS_LIST           0x0101
 204 #define TLV_HOP_COUNT              0x0103
 205 #define TLV_PATH_VECTOR            0x0104
 206 #define TLV_GENERIC_LABEL          0x0200
 207 #define TLV_ATM_LABEL              0x0201
 208 #define TLV_FRAME_LABEL            0x0202
 209 #define TLV_STATUS                 0x0300
 210 #define TLV_EXTENDED_STATUS        0x0301
 211 #define TLV_RETURNED_PDU           0x0302
 212 #define TLV_RETURNED_MESSAGE       0x0303
 213 #define TLV_COMMON_HELLO_PARMS     0x0400
 214 #define TLV_IPV4_TRANSPORT_ADDRESS 0x0401
 215 #define TLV_CONFIGURATION_SEQNO    0x0402
 216 #define TLV_IPV6_TRANSPORT_ADDRESS 0x0403
 217 #define TLV_COMMON_SESSION_PARMS   0x0500
 218 #define TLV_ATM_SESSION_PARMS      0x0501
 219 #define TLV_FRAME_RELAY_SESSION_PARMS 0x0502
 220 #define TLV_LABEL_REQUEST_MESSAGE_ID 0x0600
 221 #define TLV_ER                     0x0800
 222 #define TLV_ER_HOP_IPV4            0x0801
 223 #define TLV_ER_HOP_IPV6            0x0802
 224 #define TLV_ER_HOP_AS              0x0803
 225 #define TLV_ER_HOP_LSPID           0x0804
 226 #define TLV_TRAFFIC_PARAM          0x0810
 227 #define TLV_PREEMPTION             0x0820
 228 #define TLV_LSPID                  0x0821
 229 #define TLV_RESOURCE_CLASS         0x0822
 230 #define TLV_ROUTE_PINNING          0x0823
 231
 232 #define TLV_VENDOR_PRIVATE_START   0x3E00
 233 #define TLV_VENDOR_PRIVATE_END     0x3EFF
 234 #define TLV_EXPERIMENTAL_START     0x3F00
 235 #define TLV_EXPERIMENTAL_END       0x3FFF
 236
 237 static const value_string tlv_type_names[] = {
 238   { TLV_FEC,                       "Forwarding Equivalence Classes TLV" },
 239   { TLV_ADDRESS_LIST,              "Address List TLV"},
 240   { TLV_HOP_COUNT,                 "Hop Count TLV"},
 241   { TLV_PATH_VECTOR,               "Path Vector TLV"},
 242   { TLV_GENERIC_LABEL,             "Generic Label TLV"},
 243   { TLV_ATM_LABEL,                 "ATM Label TLV"},
 244   { TLV_FRAME_LABEL,               "Frame Label TLV"},
 245   { TLV_STATUS,                    "Status TLV"},
 246   { TLV_EXTENDED_STATUS,           "Extended Status TLV"},
 247   { TLV_RETURNED_PDU,              "Returned PDU TLV"},
 248   { TLV_RETURNED_MESSAGE,          "Returned Message TLV"},
 249   { TLV_COMMON_HELLO_PARMS,        "Common Hello Parameters TLV"},
 250   { TLV_IPV4_TRANSPORT_ADDRESS,    "IPv4 Transport Address TLV"},
 251   { TLV_CONFIGURATION_SEQNO,       "Configuration Sequence Number TLV"},
 252   { TLV_IPV6_TRANSPORT_ADDRESS,    "IPv6 Transport Address TLV"},
 253   { TLV_COMMON_SESSION_PARMS,      "Common Session Parameters TLV"},
 254   { TLV_ATM_SESSION_PARMS,         "ATM Session Parameters TLV"},
 255   { TLV_FRAME_RELAY_SESSION_PARMS, "Frame Relay Session Parameters TLV"},
 256   { TLV_LABEL_REQUEST_MESSAGE_ID,  "Label Request Message ID TLV"},
 257   { TLV_LSPID,                     "LSP ID TLV"},
 258   { TLV_ER,                        "Explicit route TLV"},
 259   { TLV_ER_HOP_IPV4,               "ER hop IPv4 prefix TLV"},
 260   { TLV_ER_HOP_IPV6,               "ER hop IPv6 prefix TLV"},
 261   { TLV_ER_HOP_AS,                 "ER hop Autonomous system number prefix TLV"},
 262   { TLV_TRAFFIC_PARAM,             "Traffic parameters TLV"},
 263   { TLV_PREEMPTION,                "Preemption TLV"},
 264   { TLV_ER_HOP_LSPID,              "ER hop LSPID prefix TLV"},
 265   { TLV_RESOURCE_CLASS,            "Resource Class (Color) TLV"},
 266   { TLV_ROUTE_PINNING,             "Route Pinning TLV"},
 267   { TLV_VENDOR_PRIVATE_START,   "Vendor Private TLV"},
 268   { TLV_EXPERIMENTAL_START,     "Experimental TLV"},
 269   { 0, NULL}
 270 };
 271
 272 /*
 273  * The following define all the message types I know about
 274  */
 275
 276 #define LDP_NOTIFICATION       0x0001
 277 #define LDP_HELLO              0x0100
 278 #define LDP_INITIALIZATION     0x0200
 279 #define LDP_KEEPALIVE          0x0201
 280 #define LDP_ADDRESS            0x0300
 281 #define LDP_ADDRESS_WITHDRAWAL 0x0301
 282 #define LDP_LABEL_MAPPING      0x0400
 283 #define LDP_LABEL_REQUEST      0x0401
 284 #define LDP_LABEL_WITHDRAWAL   0x0402
 285 #define LDP_LABEL_RELEASE      0x0403
 286 #define LDP_LABEL_ABORT_REQUEST 0x0404
 287 #define LDP_VENDOR_PRIVATE_START 0x3E00
 288 #define LDP_VENDOR_PRIVATE_END   0x3EFF
 289 #define LDP_EXPERIMENTAL_MESSAGE_START 0x3F00
 290 #define LDP_EXPERIMENTAL_MESSAGE_END   0x3FFF
 291
 292 static const value_string ldp_message_types[] = {
 293   {LDP_NOTIFICATION,             "Notification Message"},
 294   {LDP_HELLO,                    "Hello Message"},
 295   {LDP_INITIALIZATION,           "Initialization Message"},
 296   {LDP_KEEPALIVE,                "Keep Alive Message"},
 297   {LDP_ADDRESS,                  "Address Message"},
 298   {LDP_ADDRESS_WITHDRAWAL,       "Address Withdrawal Message"},
 299   {LDP_LABEL_MAPPING,            "Label Mapping Message"},
 300   {LDP_LABEL_REQUEST,            "Label Request Message"},
 301   {LDP_LABEL_WITHDRAWAL,         "Label Withdrawal Message"},
 302   {LDP_LABEL_RELEASE,            "Label Release Message"},
 303   {LDP_LABEL_ABORT_REQUEST,      "Label Abort Request Message"},
 304   {LDP_VENDOR_PRIVATE_START,     "Vendor-Private Message"},
 305   {LDP_EXPERIMENTAL_MESSAGE_START,     "Experimental Message"},
 306   {0, NULL}
 307 };
 308
 309 static const true_false_string ldp_message_ubit = {
 310   "Unknown bit set",
 311   "Unknown bit not set"
 312 };
 313
 314 static const true_false_string hello_targeted_vals = {
 315   "Targeted Hello",
 316   "Link Hello"
 317 };
 318
 319 static const value_string tlv_unknown_vals[] = {
 320   {0, "Known TLV, do not Forward"},
 321   {1, "Known TLV, do Forward"},
 322   {2, "Unknown TLV, do not Forward"},
 323   {3, "Unknown TLV, do Forward"},
 324   {0, NULL}
 325 };
 326
 327 #define WILDCARD_FEC    1
 328 #define PREFIX_FEC      2
 329 #define HOST_FEC        3
 330 #define CRLSP_FEC       4
 331 #define VC_FEC          0x80    /* draft-martini-l2circuit-trans-mpls */
 332
 333 static const value_string fec_types[] = {
 334   {WILDCARD_FEC, "Wildcard FEC"},
 335   {PREFIX_FEC, "Prefix FEC"},
 336   {HOST_FEC, "Host Address FEC"},
 337   {CRLSP_FEC, "CR LSP FEC"},
 338   {VC_FEC, "Virtual Circuit FEC"},
 339   {0, NULL}
 340 };
 341
 342
 343 static const value_string fec_vc_types_vals[] = {
 344   {0x0001, "Frame Relay DLCI"},
 345   {0x0002, "ATM VCC transport"},
 346   {0x0003, "ATM VPC transport"},
 347   {0x0004, "Ethernet VLAN"},
 348   {0x0005, "Ethernet"},
 349   {0x0006, "HDLC"},
 350   {0x0007, "PPP"},
 351   {0x0009, "ATM VCC cell transport"},
 352   {0x8008, "CEM"},
 353   {0x000A, "ATM VPC cell transport"},
 354   {0, NULL}
 355 };
 356
 357
 358 #define FEC_VC_INTERFACEPARAM_MTU          0x01
 359 #define FEC_VC_INTERFACEPARAM_MAXCATMCELLS 0x02
 360 #define FEC_VC_INTERFACEPARAM_DESCRIPTION  0x03
 361 #define FEC_VC_INTERFACEPARAM_CEMBYTES     0x04
 362 #define FEC_VC_INTERFACEPARAM_CEMOPTIONS   0x05
 363
 364
 365 static const value_string fec_vc_interfaceparm[] = {
 366   {FEC_VC_INTERFACEPARAM_MTU, "MTU"},
 367   {FEC_VC_INTERFACEPARAM_MAXCATMCELLS, "Max Concatenated ATM cells"},
 368   {FEC_VC_INTERFACEPARAM_DESCRIPTION, "Interface Description"},
 369   {FEC_VC_INTERFACEPARAM_CEMBYTES, "CEM Payload Bytes"},
 370   {FEC_VC_INTERFACEPARAM_CEMOPTIONS, "CEM options"}
 371 };
 372
 373 static const true_false_string fec_vc_cbit = {
 374   "Contorl Word Present",
 375   "Control Word NOT Present"
 376 };
 377
 378
 379
 380 static const value_string tlv_atm_merge_vals[] = {
 381   {0, "Merge not supported"},
 382   {1, "VP merge supported"},
 383   {2, "VC merge supported"},
 384   {3, "VP & VC merge supported"},
 385   {0, NULL}
 386 };
 387
 388 static const value_string tlv_atm_vbits_vals[] = {
 389   {0, "VPI & VCI Significant"},
 390   {1, "Only VPI Significant"},
 391   {2, "Only VCI Significant"},
 392   {3, "VPI & VCI not Significant, nonsense"},
 393   {0, NULL}
 394 };
 395
 396 static const value_string tlv_fr_merge_vals[] = {
 397   {0, "Merge not supported"},
 398   {1, "Merge supported"},
 399   {2, "Unspecified"},
 400   {3, "Unspecified"},
 401   {0, NULL}
 402 };
 403
 404 static const value_string tlv_fr_len_vals[] = {
 405   {0, "10 bits"},
 406   {1, "Reserved"},
 407   {2, "23 bits"},
 408   {3, "Reserved"},
 409   {0, NULL}
 410 };
 411
 412 static const value_string ldp_act_flg_vals[] = {
 413   {0, "indicates initial LSP setup"},
 414   {1, "indicates modify LSP"},
 415   {0, NULL}
 416 };
 417
 418 static const value_string route_pinning_vals[] = {
 419   {0, "route pinning is not requested"},
 420   {1, "route pinning is requested"},
 421   {0, NULL}
 422 };
 423
 424 static const value_string ldp_loose_vals[] = {
 425   {0, "strict hop"},
 426   {1, "loose hop"},
 427   {0, NULL}
 428 };
 429
 430 static const true_false_string tlv_negotiable = {
 431   "Negotiable",
 432   "Not negotiable"
 433 };
 434
 435 static const value_string freq_values[] = {
 436   {0, "Unspecified"},
 437   {1, "Frequent"},
 438   {2, "VeryFrequent"},
 439   {0, NULL}
 440 };
 441
 442 static const true_false_string tlv_atm_dirbit = {
 443   "Bidirectional capability",
 444   "Unidirectional capability"
 445 };
 446
 447 static const true_false_string hello_requested_vals = {
 448   "Source requests periodic hellos",
 449   "Source does not request periodic hellos"
 450 };
 451
 452 static const true_false_string tlv_sess_advbit_vals = {
 453   "Downstream On Demand proposed",
 454   "Downstream Unsolicited proposed"
 455 };
 456
 457 static const true_false_string tlv_sess_ldetbit_vals = {
 458   "Loop Detection Enabled",
 459   "Loop Detection Disabled"
 460 };
 461
 462 static const true_false_string tlv_status_ebit = {
 463   "Fatal Error Notification",
 464   "Advisory Notification"
 465 };
 466
 467 static const true_false_string tlv_status_fbit = {
 468   "Notification should be Forwarded",
 469   "Notification should NOT be Forwarded"
 470 };
 471
 472 static const value_string tlv_status_data[] = {
 473   {0, "Success"},
 474   {1, "Bad LDP Identifier"},
 475   {2, "Bad Protocol Version"},
 476   {3, "Bad PDU Length"},
 477   {4, "Unknown Message Type"},
 478   {5, "Bad Message Length"},
 479   {6, "Unknown TLV"},
 480   {7, "Bad TLV Length"},
 481   {8, "Malformed TLV Value"},
 482   {9, "Hold Timer Expired"},
 483   {10, "Shutdown"},
 484   {11, "Loop Detected"},
 485   {12, "Unknown FEC"},
 486   {13, "No Route"},
 487   {14, "No Label Resources"},
 488   {15, "Label Resources / Available"},
 489   {16, "Session Rejected / No Hello"},
 490   {17, "Session Rejected / Parameters Advertisement Mode"},
 491   {18, "Session Rejected / Parameters Max PDU Length"},
 492   {19, "Session Rejected / Parameters Label Range"},
 493   {20, "KeepAlive Timer Expired"},
 494   {21, "Label Request Aborted"},
 495   {22, "Missing Message Parameters"},
 496   {23, "Unsoported Address Family"},
 497   {24, "Session Rejected / Bad KeepAlive Time"},
 498   {25, "Internal Error"},
 499   {0x01000001,"Unexpected Diff-Serv TLV"},
 500   {0x01000002,"Unsupported PHB"},
 501   {0x01000003,"Invalid EXP<->PHB Mapping"},
 502   {0x01000004,"Unsupported PSC"},
 503   {0x01000005,"Per-LSP context allocation failure"},
 504   {0x04000001,"Bad Explicit Routing TLV Error"},
 505   {0x04000002,"Bad Strict Node Error"},
 506   {0x04000003,"Bad Strict Node Error"},
 507   {0x04000004,"Bad Initial ER-Hop Error"},
 508   {0x04000005,"Resource Unavailable"},
 509   {0x04000006,"Traffic Parameters Unavailable"},
 510   {0x04000007,"LSP Preempted"},
 511   {0x04000008,"Modify Request Not Supported"},
 512   {0x20000001,"Illegal C-Bit"},
 513   {0x20000002,"Wrong C-Bit"},
 514   {0, NULL}
 515 };
 516
 517 /* Dissect FEC TLV */
 518
 519 static void
 520 dissect_tlv_fec(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
 521 {
 522         proto_tree *ti=NULL, *val_tree=NULL, *fec_tree=NULL, *vcintparam_tree=NULL;
 523         guint16 family, ix=1, ax;
 524         guint8  addr_size=0, *addr, implemented, prefix_len_octets, prefix_len, host_len, vc_len;
 525         guint8  intparam_len;
 526         void *str_handler=NULL;
 527         char *str;
 528
 529         if (tree) {
 530                 ti=proto_tree_add_text(tree, tvb, offset, rem, "FEC Elements");
 531                 val_tree=proto_item_add_subtree(ti, ett_ldp_tlv_val);
 532                 if(val_tree == NULL) return;
 533
 534                 while (rem > 0){
 535                         switch (tvb_get_guint8(tvb, offset)) {
 536                         case WILDCARD_FEC:
 537                         case CRLSP_FEC:
 538                                 ti = proto_tree_add_text(val_tree, tvb, offset, 1, "FEC Element %u", ix);
 539                                 fec_tree = proto_item_add_subtree(ti, ett_ldp_fec);
 540                                 if(fec_tree == NULL) return;
 541                                 proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_wc,tvb, offset, 1, FALSE);
 542                                 rem -= 1;
 543                                 offset += 1;
 544                                 break;
 545
 546                         case PREFIX_FEC:
 547                                 if( rem < 4 ){/*not enough*/
 548                                         proto_tree_add_text(val_tree, tvb, offset, rem, "Error in FEC Element %u", ix);
 549                                         return;
 550                                 }
 551                                 family=tvb_get_ntohs(tvb, offset+1);
 552                                 prefix_len=tvb_get_guint8(tvb, offset+3);
 553                                 prefix_len_octets=(prefix_len+7)/8;
 554
 555                                 implemented=1;
 556                                 switch(family) {
 557                                         case AFNUM_INET: /*IPv4*/
 558                                                 addr_size=4;
 559                                                 str_handler=ip_to_str;
 560                                                 break;
 561                                         case AFNUM_INET6: /*IPv6*/
 562                                                 addr_size=16;
 563                                                 str_handler=ip6_to_str;
 564                                                 break;
 565                                         default:
 566                                                 implemented=0;
 567                                                 break;
 568                                 }
 569
 570                                 if( !implemented ) {
 571                                         guint16 noctets;
 572
 573                                         noctets= rem>4+prefix_len_octets?4+prefix_len_octets:rem;
 574                                         proto_tree_add_text(val_tree, tvb, offset, noctets,"Support for Address Family not implemented");
 575                                         offset+=noctets;
 576                                         rem-=noctets;
 577                                         break;
 578                                 }
 579
 580                                 if( rem < 4+MIN(addr_size, prefix_len_octets) ){
 581                                         proto_tree_add_text(val_tree, tvb, offset, rem, "Error in FEC Element %u", ix);
 582                                         return;
 583                                 }
 584
 585                                 /*Add a subtree for this*/
 586                                 ti = proto_tree_add_text(val_tree, tvb, offset, 4+MIN(addr_size, prefix_len_octets), "FEC Element %u", ix);
 587                                 fec_tree = proto_item_add_subtree(ti, ett_ldp_fec);
 588                                 if(fec_tree == NULL) return;
 589                                 proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_wc, tvb, offset, 1, FALSE);
 590                                 offset += 1;
 591
 592                                 proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_af, tvb, offset, 2, FALSE);
 593                                 offset += 2;
 594
 595                                 proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_len, tvb, offset, 1, FALSE);
 596                                 offset += 1;
 597
 598
 599                                 if( addr_size < prefix_len_octets) {
 600                                         offset+=addr_size;
 601                                         rem-=addr_size;
 602                                         proto_tree_add_text(fec_tree, tvb, offset-1, 1, "Invalid prefix %u length for family %s", prefix_len, val_to_str(family, afn_vals, "Unknown Family"));
 603                                         break;
 604                                 }
 605
 606                                 if( (addr=g_malloc0(addr_size)) == NULL ){
 607                                         /*big big trouble, no mem or bad addr_size*/
 608                                         fprintf(stderr, "packet-ldp: dissect_tlv_fec() malloc failed\n");
 609                                         return;
 610                                 }
 611
 612                                 for(ax=0; ax+1 <= prefix_len_octets; ax++)
 613                                         addr[ax]=tvb_get_guint8(tvb, offset+ax);
 614                                 if( prefix_len % 8 )
 615                                         addr[ax-1] = addr[ax-1]&(0xFF<<(8-prefix_len%8));
 616
 617                                 str = (* (char* (*)(guint8 *))str_handler)(addr);
 618                                 proto_tree_add_string_format(fec_tree, hf_ldp_tlv_fec_pfval, tvb, offset, prefix_len_octets, str, "Prefix: %s", str);
 619
 620                                 offset += prefix_len_octets;
 621                                 rem -= 4+prefix_len_octets;
 622                                 g_free(addr);
 623                                 break;
 624
 625                         case HOST_FEC:
 626                                 if( rem < 4 ){/*not enough*/
 627                                         proto_tree_add_text(val_tree, tvb, offset, rem, "Error in FEC Element %u", ix);
 628                                         return;
 629                                 }
 630                                 family=tvb_get_ntohs(tvb, offset+1);
 631                                 host_len=tvb_get_guint8(tvb, offset+3);
 632
 633                                 implemented=1;
 634                                 switch(family) {
 635                                         case AFNUM_INET: /*IPv4*/
 636                                                 addr_size=4;
 637                                                 str_handler=ip_to_str;
 638                                                 break;
 639                                         case AFNUM_INET6: /*IPv6*/
 640                                                 addr_size=16;
 641                                                 str_handler=ip6_to_str;
 642                                                 break;
 643                                         default:
 644                                                 implemented=0;
 645                                                 break;
 646                                 }
 647
 648                                 if( !implemented ) {
 649                                         guint16 noctets;
 650
 651                                         noctets= rem>4+host_len?4+host_len:rem;
 652                                         proto_tree_add_text(val_tree, tvb, offset, noctets,"Support for Address Family not implemented");
 653                                         offset+=noctets;
 654                                         rem-=noctets;
 655                                         break;
 656                                 }
 657
 658                                 if( rem < 4+addr_size ){
 659                                         proto_tree_add_text(val_tree, tvb, offset, rem, "Error in FEC Element %u", ix);
 660                                         return;
 661                                 }
 662
 663                                 /*Add a subtree for this*/
 664                                 ti = proto_tree_add_text(val_tree, tvb, offset, 4+addr_size, "FEC Element %u", ix);
 665                                 fec_tree = proto_item_add_subtree(ti, ett_ldp_fec);
 666                                 if(fec_tree == NULL) return;
 667                                 proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_wc, tvb, offset, 1, FALSE);
 668                                 offset += 1;
 669
 670                                 proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_af, tvb, offset, 2, FALSE);
 671                                 offset += 2;
 672
 673                                 proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_len, tvb, offset, 1, FALSE);
 674                                 offset += 1;
 675
 676
 677                                 if( addr_size != host_len) {
 678                                         offset+=addr_size;
 679                                         rem-=addr_size;
 680                                         proto_tree_add_text(fec_tree, tvb, offset-1, 1, "Invalid address length %u length for family %s", host_len, val_to_str(family, afn_vals, "Unknown Family"));
 681                                         break;
 682                                 }
 683
 684                                 if( (addr=g_malloc0(addr_size)) == NULL ){
 685                                         /*big big xtrouble, no mem or bad addr_size*/
 686                                         fprintf(stderr, "packet-ldp: dissect_tlv_fec() malloc failed\n");
 687                                         return;
 688                                 }
 689
 690                                 for(ax=0; ax+1 <= host_len; ax++)
 691                                         addr[ax]=tvb_get_guint8(tvb, offset+ax);
 692
 693                                 str = (* (char* (*)(guint8 *))str_handler)(addr);
 694                                 proto_tree_add_string_format(fec_tree, hf_ldp_tlv_fec_hoval, tvb, offset, host_len, str, "Address: %s", str);
 695
 696                                 offset += host_len;
 697                                 rem -= 4+host_len;
 698                                 g_free(addr);
 699                                 break;
 700
 701                         case VC_FEC:
 702                           if( rem < 8 ){/*not enough bytes for a minimal VC_FEC*/
 703                             proto_tree_add_text(val_tree, tvb, offset, rem, "Error in FEC Element %u", ix);
 704                             return;
 705                           }
 706                           vc_len = tvb_get_guint8 (tvb, offset+3);
 707
 708
 709                           ti = proto_tree_add_text(val_tree, tvb, offset, 8+vc_len, "FEC Element %u", ix);
 710                           fec_tree = proto_item_add_subtree(ti, ett_ldp_fec);
 711                           if(fec_tree == NULL) return;
 712                           proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_wc, tvb, offset, 1, FALSE);
 713                           proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_vc_controlword, tvb, offset+1, 1, FALSE);
 714                           proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_vc_vctype, tvb, offset+1, 2, FALSE);
 715                           proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_vc_infolength, tvb, offset+3,1,FALSE);
 716                           proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_vc_groupid,tvb, offset +4, 4, FALSE);
 717                           rem -=8;
 718                           offset +=8;
 719
 720                           if ( (vc_len > 3) && ( rem > 3 ) ) { /* there is enough room for vcid */
 721                             proto_tree_add_item(fec_tree, hf_ldp_tlv_fec_vc_vcid,tvb, offset, 4, FALSE);
 722                             proto_item_append_text (ti," VCID: %u",tvb_get_ntohl(tvb,offset));
 723
 724                           } else {
 725                             proto_tree_add_text(val_tree,tvb,offset +4, 8 +vc_len, "VC FEC size format error");
 726                             return;
 727                           }
 728                           rem -= 4;
 729                           vc_len -= 4;
 730                           offset += 4;
 731
 732                           while ( (vc_len > 1) && (rem > 1) ) { /* enough to include id and length */
 733                             intparam_len = tvb_get_guint8(tvb, offset+1);
 734                             ti = proto_tree_add_text(fec_tree, tvb, offset, 4, "Interface Paramameter");
 735                             vcintparam_tree = proto_item_add_subtree(ti, ett_ldp_fec_vc_interfaceparam);
 736                             if(vcintparam_tree == NULL) return;
 737                             proto_tree_add_item(vcintparam_tree,hf_ldp_tlv_fec_vc_intparam_id,tvb,offset,1,FALSE);
 738                             proto_tree_add_item(vcintparam_tree,hf_ldp_tlv_fec_vc_intparam_length,tvb, offset+1, 1, FALSE);
 739                             if ( (vc_len -intparam_len) <0 && (rem -intparam_len) <0 ) { /* error condition */
 740                               proto_tree_add_text(vcintparam_tree, tvb, offset +2, MIN(vc_len,rem), "malformed data");
 741                               return;
 742                             }
 743                             switch (tvb_get_guint8(tvb, offset)) {
 744                             case FEC_VC_INTERFACEPARAM_MTU:
 745                               proto_item_append_text(ti,": MTU %u", tvb_get_ntohs(tvb,offset+2));
 746                               proto_tree_add_item(vcintparam_tree,hf_ldp_tlv_fec_vc_intparam_mtu,tvb, offset+2, 2, FALSE);
 747                               break;
 748                             case FEC_VC_INTERFACEPARAM_MAXCATMCELLS:
 749                               proto_item_append_text(ti,": Max ATM Concat Cells %u", tvb_get_ntohs(tvb,offset+2));
 750                               proto_tree_add_item(vcintparam_tree,hf_ldp_tlv_fec_vc_intparam_maxcatmcells,tvb, offset+2, 2, FALSE);
 751                               break;
 752                             case FEC_VC_INTERFACEPARAM_DESCRIPTION:
 753                               proto_item_append_text(ti,": Description");
 754                               proto_tree_add_item(vcintparam_tree,hf_ldp_tlv_fec_vc_intparam_desc,tvb, offset+2, (intparam_len -2), FALSE);
 755                               break;
 756                             case FEC_VC_INTERFACEPARAM_CEMBYTES:
 757                               proto_item_append_text(ti,": CEM Payload Bytes %u", tvb_get_ntohs(tvb,offset+2));
 758                               proto_tree_add_item(vcintparam_tree,hf_ldp_tlv_fec_vc_intparam_cembytes,tvb, offset+2, 2, FALSE);
 759                               break;
 760                             case FEC_VC_INTERFACEPARAM_CEMOPTIONS:
 761                                 /* draft-malis-sonet-ces-mpls CEM options still undefined */
 762                             default: /* unknown */
 763                               proto_item_append_text(ti," unknown");
 764                               proto_tree_add_text(vcintparam_tree,tvb, offset+2, (intparam_len -2), "Unknown data");
 765
 766                               return;
 767                             }
 768                             rem -= intparam_len;
 769                             vc_len -= intparam_len;
 770                             offset += intparam_len;
 771                           }
 772                           break;
 773
 774                         default:  /* Unknown */
 775                         /* XXX - do all FEC's have a length that's a multiple of 4? */
 776                         /* Hmmm, don't think so. Will check. RJS. */
 777                         /* If we don't know its structure, we have to exit */
 778                                 ti = proto_tree_add_text(val_tree, tvb, offset, 4, "FEC Element %u", ix);
 779                                 fec_tree = proto_item_add_subtree(ti, ett_ldp_fec);
 780                                 if(fec_tree == NULL) return;
 781                                 proto_tree_add_text(fec_tree, tvb, offset, rem, "Unknown FEC TLV type");
 782                                 return;
 783                         }
 784                         ix++;
 785                 }
 786         }
 787 }
 788
 789 /* Dissect Address List TLV */
 790
 791 static void
 792 dissect_tlv_address_list(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
 793 {
 794         proto_tree *ti = NULL, *val_tree = NULL;
 795         guint16 family, ix;
 796         guint8  addr_size, *addr;
 797         void *str_handler;
 798         char *str;
 799
 800         if (tree) {
 801                 if( rem < 2 ) {
 802                         proto_tree_add_text(tree, tvb, offset, rem,
 803                             "Error processing Address List TLV: length is %d, should be >= 2",
 804                             rem);
 805                         return;
 806                 }
 807
 808                 family=tvb_get_ntohs(tvb, offset);
 809                 proto_tree_add_item(tree, hf_ldp_tlv_addrl_addr_family, tvb,
 810                                          offset, 2, FALSE);
 811                 switch(family) {
 812                         case AFNUM_INET: /*IPv4*/
 813                                 addr_size=4;
 814                                 str_handler=ip_to_str;
 815                                 break;
 816                         case AFNUM_INET6: /*IPv6*/
 817                                 addr_size=16;
 818                                 str_handler=ip6_to_str;
 819                                 break;
 820                         default:
 821                                 proto_tree_add_text(tree, tvb, offset+2, rem-2,
 822                                  "Support for Address Family not implemented");
 823                                 return;
 824                 }
 825
 826                 offset+=2; rem-=2;
 827                 ti=proto_tree_add_text(tree, tvb, offset, rem, "Addresses");
 828                 val_tree=proto_item_add_subtree(ti, ett_ldp_tlv_val);
 829
 830                 if(val_tree == NULL) return;
 831                 if( (addr=g_malloc(addr_size)) == NULL ){
 832                         /*big big trouble*/
 833                         fprintf(stderr, "packet-ldp: dissect_tlv_address_list() malloc failed\n");
 834                         return;
 835                 }
 836
 837                 for(ix=1; rem >= addr_size; ix++, offset += addr_size,
 838                                                          rem -= addr_size) {
 839                         if( (tvb_memcpy(tvb, addr, offset, addr_size))
 840                                                          == NULL)
 841                                 break;
 842
 843                         str = (* (char* (*)(guint8 *))str_handler)(addr);
 844                         proto_tree_add_string_format(val_tree,
 845                             hf_ldp_tlv_addrl_addr, tvb, offset, addr_size, str,
 846                             "Address %u: %s", ix, str);
 847                 }
 848                 if(rem)
 849                         proto_tree_add_text(val_tree, tvb, offset, rem,
 850                             "Error processing TLV: Extra data at end of address list");
 851                 g_free(addr);
 852         }
 853 }
 854
 855 /* Dissect Path Vector TLV */
 856
 857 static void
 858 dissect_tlv_path_vector(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
 859 {
 860         proto_tree *ti = NULL, *val_tree = NULL;
 861         guint8  ix;
 862         guint32 addr;
 863
 864         if (tree) {
 865                 ti=proto_tree_add_text(tree, tvb, offset, rem, "LSR IDs");
 866                 val_tree=proto_item_add_subtree(ti, ett_ldp_tlv_val);
 867
 868                 if(val_tree == NULL) return;
 869
 870                 for(ix=1; rem >= 4; ix++, offset += 4, rem -= 4) {
 871                         tvb_memcpy(tvb, (guint8 *)&addr, offset, 4);
 872                         proto_tree_add_ipv4_format(val_tree,
 873                             hf_ldp_tlv_pv_lsrid, tvb, offset, 4,
 874                             addr, "LSR Id %u: %s", ix,
 875                             ip_to_str((guint8 *)&addr));
 876                 }
 877                 if(rem)
 878                         proto_tree_add_text(val_tree, tvb, offset, rem,
 879                             "Error processing TLV: Extra data at end of path vector");
 880         }
 881 }
 882
 883 /* Dissect ATM Label TLV */
 884
 885 static void
 886 dissect_tlv_atm_label(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
 887 {
 888         proto_tree *ti = NULL, *val_tree = NULL;
 889         guint16 id;
 890
 891         if(tree) {
 892                 if(rem != 4){
 893                         proto_tree_add_text(tree, tvb, offset, rem,
 894                             "Error processing ATM Label TLV: length is %d, should be 4",
 895                             rem);
 896                         return;
 897                 }
 898                 ti=proto_tree_add_text(tree, tvb, offset, rem, "ATM Label");
 899                 val_tree=proto_item_add_subtree(ti, ett_ldp_tlv_val);
 900                 if(val_tree == NULL) return;
 901
 902                 proto_tree_add_item(val_tree, hf_ldp_tlv_atm_label_vbits, tvb, offset, 1, FALSE);
 903
 904                 id=tvb_get_ntohs(tvb, offset)&0x0FFF;
 905                 proto_tree_add_uint_format(val_tree, hf_ldp_tlv_atm_label_vpi, tvb, offset, 2, id, "VPI: %u", id);
 906
 907                 id=tvb_get_ntohs(tvb, offset+2);
 908                 proto_tree_add_uint_format(val_tree, hf_ldp_tlv_atm_label_vci, tvb, offset+2, 2, id, "VCI: %u", id);
 909         }
 910 }
 911
 912 /* Dissect FRAME RELAY Label TLV */
 913
 914 static void
 915 dissect_tlv_frame_label(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
 916 {
 917         proto_tree *ti = NULL, *val_tree = NULL;
 918         guint8  len;
 919         guint32 id;
 920
 921         if(tree) {
 922                 if(rem != 4){
 923                         proto_tree_add_text(tree, tvb, offset, rem,
 924                             "Error processing Frame Relay Label TLV: length is %d, should be 4",
 925                             rem);
 926                         return;
 927                 }
 928                 ti=proto_tree_add_text(tree, tvb, offset, rem, "Frame Relay Label");
 929                 val_tree=proto_item_add_subtree(ti, ett_ldp_tlv_val);
 930                 if(val_tree == NULL) return;
 931
 932                 len=(guint8)(tvb_get_ntohs(tvb, offset)>>7) & 0x03;
 933                 proto_tree_add_uint_format(val_tree, hf_ldp_tlv_fr_label_len, tvb, offset, 2, len, "Number of DLCI bits: %s (%u)", val_to_str(len, tlv_fr_len_vals, "Unknown Length"), len);
 934
 935                 id=tvb_get_ntoh24(tvb, offset+1)&0x7FFFFF;
 936                 proto_tree_add_uint_format(val_tree,
 937                 hf_ldp_tlv_fr_label_dlci, tvb, offset+1, 3, id, "DLCI: %u", id);
 938         }
 939 }
 940
 941 /* Dissect STATUS TLV */
 942
 943 static void
 944 dissect_tlv_status(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
 945 {
 946         proto_tree *ti = NULL, *val_tree = NULL;
 947         guint32 data;
 948
 949         if(tree) {
 950                 if(rem != 10){
 951                         proto_tree_add_text(tree, tvb, offset, rem,
 952                             "Error processing Status TLV: length is %d, should be 10",
 953                             rem);
 954                         return;
 955                 }
 956
 957                 ti=proto_tree_add_text(tree, tvb, offset, rem, "Status");
 958                 val_tree=proto_item_add_subtree(ti, ett_ldp_tlv_val);
 959                 if(val_tree == NULL) return;
 960
 961                 proto_tree_add_item(val_tree, hf_ldp_tlv_status_ebit, tvb, offset, 1, FALSE);
 962                 proto_tree_add_item(val_tree, hf_ldp_tlv_status_fbit, tvb, offset, 1, FALSE);
 963
 964                 data=tvb_get_ntohl(tvb, offset)&0x3FFFFFFF;
 965                 proto_tree_add_uint_format(val_tree, hf_ldp_tlv_status_data, tvb, offset, 4, data, "Status Data: %s (0x%X)", val_to_str(data, tlv_status_data, "Unknown Status Data"), data);
 966
 967                 proto_tree_add_item(val_tree, hf_ldp_tlv_status_msg_id, tvb, offset+4, 4, FALSE);
 968                 proto_tree_add_item(val_tree, hf_ldp_tlv_status_msg_type, tvb, offset+8, 2, FALSE);
 969         }
 970 }
 971
 972 /* Dissect Returned PDU TLV */
 973
 974 static void
 975 dissect_tlv_returned_pdu(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
 976 {
 977         proto_tree *ti = NULL, *val_tree = NULL;
 978
 979         if(tree) {
 980                 if(rem < 10){
 981                         proto_tree_add_text(tree, tvb, offset, rem,
 982                             "Error processing Returned PDU TLV: length is %d, should be >= 10",
 983                             rem);
 984                         return;
 985                 }
 986                 ti=proto_tree_add_text(tree, tvb, offset, rem, "Returned PDU");
 987                 val_tree=proto_item_add_subtree(ti, ett_ldp_tlv_val);
 988                 if(val_tree == NULL) return;
 989
 990                 proto_tree_add_item(val_tree, hf_ldp_tlv_returned_version, tvb, offset, 2, FALSE);
 991                 proto_tree_add_item(val_tree, hf_ldp_tlv_returned_pdu_len, tvb, offset+2, 2, FALSE);
 992                 proto_tree_add_item(val_tree, hf_ldp_tlv_returned_lsr, tvb, offset+4, 4, FALSE);
 993                 proto_tree_add_item(val_tree, hf_ldp_tlv_returned_ls_id, tvb, offset+8, 2, FALSE);
 994                 offset += 10;
 995                 rem -= 10;
 996
 997                 if( rem > 0 ) {
 998                 /*XXX - dissect returned pdu data*/
 999                         proto_tree_add_text(val_tree, tvb, offset, rem, "Returned PDU Data");
1000                 }
1001         }
1002 }
1003
1004 /* Dissect Returned MESSAGE TLV */
1005
1006 static void
1007 dissect_tlv_returned_message(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1008 {
1009         proto_tree *ti = NULL, *val_tree = NULL;
1010         guint16 type;
1011
1012         if(tree) {
1013                 if(rem < 4){
1014                         proto_tree_add_text(tree, tvb, offset, rem,
1015                             "Error processing Returned Message TLV: length is %d, should be >= 4",
1016                             rem);
1017                         return;
1018                 }
1019                 ti=proto_tree_add_text(tree, tvb, offset, rem, "Returned Message");
1020                 val_tree=proto_item_add_subtree(ti, ett_ldp_tlv_val);
1021                 if(val_tree == NULL) return;
1022
1023                 proto_tree_add_item(val_tree, hf_ldp_tlv_returned_msg_ubit, tvb, offset, 1, FALSE);
1024
1025                 type=tvb_get_ntohs(tvb, offset)&0x7FFF;
1026                 proto_tree_add_uint_format(val_tree, hf_ldp_tlv_returned_msg_type, tvb, offset, 2, type, "Message Type: %s (0x%X)", val_to_str(type, ldp_message_types,"Unknown Message Type"), type);
1027
1028                 proto_tree_add_item(val_tree, hf_ldp_tlv_returned_msg_len, tvb, offset+2, 2, FALSE);
1029                 offset += 4;
1030                 rem -= 4;
1031
1032                 if( rem >= 4  ) { /*have msg_id*/
1033                         proto_tree_add_item(val_tree, hf_ldp_tlv_returned_msg_id, tvb, offset, 4, FALSE);
1034                         offset += 4;
1035                         rem -= 4;
1036                 }
1037
1038                 if( rem > 0 ) {
1039                 /*XXX - dissect returned msg parameters*/
1040                         proto_tree_add_text(val_tree, tvb, offset, rem, "Returned Message Parameters");
1041                 }
1042         }
1043 }
1044
1045 /* Dissect the common hello params */
1046
1047 static void
1048 dissect_tlv_common_hello_parms(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1049 {
1050 #if 0
1051         proto_tree *ti = NULL;
1052 #endif
1053         proto_tree *val_tree = NULL;
1054
1055         if (tree) {
1056 #if 0
1057                 ti = proto_tree_add_item(tree, hf_ldp_tlv_value, tvb, offset, rem, FALSE);
1058                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1059                 if(val_tree == NULL) return;
1060 #else
1061                 val_tree=tree;
1062 #endif
1063                 proto_tree_add_item(val_tree, hf_ldp_tlv_val_hold, tvb, offset, 2, FALSE);
1064                 proto_tree_add_item(val_tree, hf_ldp_tlv_val_target, tvb, offset + 2, 2, FALSE);
1065                 proto_tree_add_item(val_tree, hf_ldp_tlv_val_request, tvb, offset + 2, 2, FALSE);
1066                 proto_tree_add_item(val_tree, hf_ldp_tlv_val_res, tvb, offset + 2, 2, FALSE);
1067         }
1068 }
1069
1070 /* Dissect the common session params */
1071
1072 static void
1073 dissect_tlv_common_session_parms(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1074 {
1075         proto_tree *ti = NULL, *val_tree = NULL;
1076
1077         if (tree != NULL) {
1078                 if( rem != 14) { /*length of Comm Sess Parms tlv*/
1079                         proto_tree_add_text(tree, tvb, offset, rem,
1080                             "Error processing Common Session Parameters TLV: length is %d, should be 14",
1081                             rem);
1082                         return;
1083                 }
1084                 ti = proto_tree_add_text(tree, tvb, offset, rem, "Parameters");
1085                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1086
1087                 if(val_tree != NULL) {
1088                         /*Protocol Version*/
1089                         proto_tree_add_item(val_tree, hf_ldp_tlv_sess_ver, tvb,offset, 2, FALSE);
1090
1091                         /*KeepAlive Time*/
1092                         proto_tree_add_item(val_tree, hf_ldp_tlv_sess_ka, tvb,offset + 2, 2, FALSE);
1093
1094                         /*A bit*/
1095                         proto_tree_add_item(val_tree, hf_ldp_tlv_sess_advbit,tvb, offset + 4, 1, FALSE);
1096
1097                         /*D bit*/
1098                         proto_tree_add_item(val_tree, hf_ldp_tlv_sess_ldetbit,tvb, offset + 4, 1, FALSE);
1099
1100                         /*Path Vector Limit*/
1101                         proto_tree_add_item(val_tree, hf_ldp_tlv_sess_pvlim,tvb, offset + 5, 1, FALSE);
1102
1103                         /*Max PDU Length*/
1104                         proto_tree_add_item(val_tree, hf_ldp_tlv_sess_mxpdu,tvb, offset + 6, 2, FALSE);
1105
1106                         /*Rx LSR*/
1107                         proto_tree_add_item(val_tree, hf_ldp_tlv_sess_rxlsr,tvb, offset + 8, 4, FALSE);
1108
1109                         /*Rx LS*/
1110                         proto_tree_add_item(val_tree, hf_ldp_tlv_sess_rxls,tvb, offset + 12, 2, FALSE);
1111                 }
1112         }
1113 }
1114
1115 /* Dissect the atm session params */
1116
1117 static void
1118 dissect_tlv_atm_session_parms(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1119 {
1120         proto_tree *ti = NULL, *val_tree = NULL, *lbl_tree = NULL;
1121         guint8 numlr, ix;
1122         guint16 id;
1123
1124         if (tree != NULL) {
1125                 if(rem < 4) {
1126                         proto_tree_add_text(tree, tvb, offset, rem,
1127                             "Error processing ATM Parameters TLV: length is %d, should be >= 4",
1128                             rem);
1129                         return;
1130                 }
1131
1132                 ti = proto_tree_add_text(tree, tvb, offset, rem,"ATM Parameters");
1133                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1134
1135                 if(val_tree != NULL) {
1136                         proto_tree_add_item(val_tree, hf_ldp_tlv_sess_atm_merge,tvb, offset, 1, FALSE);
1137
1138                         /*get the number of label ranges*/
1139                         numlr=(tvb_get_guint8(tvb, offset)>>2) & 0x0F;
1140                         proto_tree_add_uint_format(val_tree, hf_ldp_tlv_sess_atm_lr,
1141                         tvb, offset, 1, numlr, "Number of Label Range components: %u",
1142                         numlr);
1143
1144                         proto_tree_add_item(val_tree, hf_ldp_tlv_sess_atm_dir,tvb, offset, 1, FALSE);
1145
1146                         /*move into range components*/
1147                         offset += 4;
1148                         rem -= 4;
1149                         ti = proto_tree_add_text(val_tree, tvb, offset, rem,"ATM Label Range Components");
1150
1151                         if(numlr) {
1152                                 val_tree=proto_item_add_subtree(ti,ett_ldp_tlv_val);
1153                                 if( ! val_tree ) return;
1154                         }
1155                         /*now dissect ranges*/
1156                         for(ix=1; numlr > 0 && rem >= 8; ix++, rem-=8, numlr--) {
1157                                 ti=proto_tree_add_text(val_tree, tvb, offset, 8,
1158                                  "ATM Label Range Component %u", ix);
1159                                 lbl_tree=proto_item_add_subtree(ti, ett_ldp_tlv_val);
1160
1161                                 if( lbl_tree == NULL ) break;
1162
1163                                 id=tvb_get_ntohs(tvb, offset)&0x0FFF;
1164                                 proto_tree_add_uint_format(lbl_tree,
1165                                     hf_ldp_tlv_sess_atm_minvpi,
1166                                     tvb, offset, 2,
1167                                     id, "Minimum VPI: %u", id);
1168                                 id=tvb_get_ntohs(tvb, offset+4)&0x0FFF;
1169                                 proto_tree_add_uint_format(lbl_tree,
1170                                     hf_ldp_tlv_sess_atm_maxvpi,
1171                                     tvb, (offset+4), 2, id,
1172                                     "Maximum VPI: %u", id);
1173
1174                                 id=tvb_get_ntohs(tvb, offset+2);
1175                                 proto_tree_add_uint_format(lbl_tree,
1176                                     hf_ldp_tlv_sess_atm_minvci,
1177                                     tvb, offset+2, 2,
1178                                     id, "Minimum VCI: %u", id);
1179                                 id=tvb_get_ntohs(tvb, offset+6);
1180                                 proto_tree_add_uint_format(lbl_tree,
1181                                     hf_ldp_tlv_sess_atm_maxvci,
1182                                     tvb, offset+6, 2,
1183                                     id, "Maximum VCI: %u", id);
1184
1185                                 offset += 8;
1186                         }
1187                         if( rem || numlr)
1188                                 proto_tree_add_text(val_tree, tvb, offset, rem,
1189                                     "Error processing TLV: Extra data at end of TLV");
1190                 }
1191         }
1192 }
1193
1194 /* Dissect the frame relay session params */
1195
1196 static void
1197 dissect_tlv_frame_relay_session_parms(tvbuff_t *tvb, guint offset,proto_tree *tree, int rem)
1198 {
1199         proto_tree *ti = NULL, *val_tree = NULL, *lbl_tree = NULL;
1200         guint8 numlr, ix, len;
1201         guint32 id;
1202
1203         if (tree != NULL) {
1204                 if(rem < 4) {
1205                         proto_tree_add_text(tree, tvb, offset, rem,
1206                             "Error processing Frame Relay Parameters TLV: length is %d, should be >= 4",
1207                             rem);
1208                         return;
1209                 }
1210
1211                 ti = proto_tree_add_text(tree, tvb, offset, rem,
1212                                                  "Frame Relay Parameters");
1213                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1214
1215                 if(val_tree != NULL) {
1216                         proto_tree_add_item(val_tree, hf_ldp_tlv_sess_fr_merge,
1217                                 tvb, offset, 1, FALSE);
1218
1219                         /*get the number of label ranges*/
1220                         numlr=(tvb_get_guint8(tvb, offset)>>2) & 0x0F;
1221                         proto_tree_add_uint_format(val_tree, hf_ldp_tlv_sess_fr_lr,
1222                         tvb, offset, 1, numlr, "Number of Label Range components: %u",
1223                         numlr);
1224
1225                         proto_tree_add_item(val_tree, hf_ldp_tlv_sess_fr_dir,
1226                                  tvb, offset, 1, FALSE);
1227
1228                         /*move into range components*/
1229                         offset += 4;
1230                         rem -= 4;
1231                         ti = proto_tree_add_text(val_tree, tvb, offset, rem,
1232                                  "Frame Relay Label Range Components");
1233
1234                         if(numlr) {
1235                                 val_tree=proto_item_add_subtree(ti,
1236                                                          ett_ldp_tlv_val);
1237                                 if( ! val_tree ) return;
1238                         }
1239
1240                         /*now dissect ranges*/
1241                         for(ix=1; numlr > 0 && rem >= 8; ix++, rem-=8, numlr--) {
1242                                 ti=proto_tree_add_text(val_tree, tvb, offset, 8,
1243                                 "Frame Relay Label Range Component %u", ix);
1244                                 lbl_tree=proto_item_add_subtree(ti, ett_ldp_tlv_val);
1245
1246                                 if( lbl_tree == NULL ) break;
1247
1248                                 len=(guint8)(tvb_get_ntohs(tvb, offset)>>7) & 0x03;
1249                                 proto_tree_add_uint_format(lbl_tree, hf_ldp_tlv_sess_fr_len, tvb, offset, 2, len, "Number of DLCI bits: %s (%u)", val_to_str(len, tlv_fr_len_vals, "Unknown Length"), len);
1250
1251                                 id=tvb_get_ntoh24(tvb, offset+1)&0x7FFFFF;
1252                                 proto_tree_add_uint_format(lbl_tree,
1253                         hf_ldp_tlv_sess_fr_mindlci, tvb, offset+1, 3, id, "Minimum DLCI %u", id);
1254                                 id=tvb_get_ntoh24(tvb, offset+5)&0x7FFFFF;
1255                                 proto_tree_add_uint_format(lbl_tree,
1256                         hf_ldp_tlv_sess_fr_maxdlci, tvb, offset+5, 3, id, "Maximum DLCI %u", id);
1257
1258                                 offset += 8;
1259                         }
1260
1261                         if( rem || numlr)
1262                                 proto_tree_add_text(val_tree, tvb, offset, rem,
1263                                  "Error processing TLV: Extra data at end of TLV");
1264                 }
1265         }
1266 }
1267
1268
1269 static void
1270 dissect_tlv_lspid(tvbuff_t *tvb, guint offset,proto_tree *tree, int rem)
1271 {
1272         proto_tree *ti = NULL, *val_tree = NULL;
1273
1274         if (tree != NULL) {
1275                 if(rem != 8) {
1276                         proto_tree_add_text(tree, tvb, offset, rem,
1277                             "Error processing LSP ID TLV: length is %d, should be 8",
1278                             rem);
1279                         return;
1280                 }
1281
1282                 ti = proto_tree_add_text(tree, tvb, offset, rem,
1283                                                 "LSP ID");
1284                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1285
1286                 if(val_tree != NULL) {
1287                         proto_tree_add_item(val_tree, hf_ldp_tlv_lspid_act_flg,
1288                                            tvb, offset, 2, FALSE);
1289                         offset += 2;
1290                         proto_tree_add_item(val_tree, hf_ldp_tlv_lspid_cr_lsp,
1291                                            tvb, offset, 2, FALSE);
1292                         offset += 2;
1293                         proto_tree_add_item(val_tree, hf_ldp_tlv_lspid_ldpid,
1294                                            tvb, offset, 4, FALSE);
1295                 }
1296         }
1297 }
1298
1299 static void
1300 dissect_tlv_er_hop_ipv4(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1301 {
1302         proto_tree *ti = NULL, *val_tree = NULL;
1303
1304
1305         if (tree != NULL) {
1306                 if(rem != 8) {
1307                         proto_tree_add_text(tree, tvb, offset, rem,
1308                             "Error processing ER HOP IPv4 TLV: length is %d, should be 8",
1309                             rem);
1310                         return;
1311                 }
1312                 ti = proto_tree_add_text(tree, tvb, offset, rem, "ER HOP IPv4");
1313                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1314
1315                 if(val_tree != NULL) {
1316                         proto_tree_add_item(val_tree, hf_ldp_tlv_er_hop_loose,
1317                                            tvb, offset, 3, FALSE);
1318                         offset += 3;
1319                         proto_tree_add_item(val_tree, hf_ldp_tlv_er_hop_prelen,
1320                                            tvb, offset, 1, FALSE);
1321                         offset ++;
1322                         proto_tree_add_item(val_tree, hf_ldp_tlv_er_hop_prefix4,
1323                                            tvb, offset, 4, FALSE);
1324                 }
1325         }
1326 }
1327
1328 static void
1329 dissect_tlv_er_hop_ipv6(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1330 {
1331         proto_tree *ti = NULL, *val_tree = NULL;
1332
1333         if (tree != NULL) {
1334                 if(rem != 20) {
1335                         proto_tree_add_text(tree, tvb, offset, rem,
1336                             "Error processing ER HOP IPv6 TLV: length is %d, should be 20",
1337                             rem);
1338                         return;
1339                 }
1340                 ti = proto_tree_add_text(tree, tvb, offset, rem, "ER HOP IPv6");
1341                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1342
1343                 if(val_tree != NULL) {
1344                         proto_tree_add_item(val_tree, hf_ldp_tlv_er_hop_loose,
1345                                            tvb, offset, 3, FALSE);
1346                         offset += 3;
1347                         proto_tree_add_item(val_tree, hf_ldp_tlv_er_hop_prelen,
1348                                           tvb, offset, 1, FALSE);
1349                         offset ++;
1350                         proto_tree_add_item(val_tree, hf_ldp_tlv_er_hop_prefix6,
1351                                            tvb, offset, 16, FALSE);
1352                 }
1353         }
1354 }
1355
1356 static void
1357 dissect_tlv_er_hop_as(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1358 {
1359         proto_tree *ti = NULL, *val_tree = NULL;
1360
1361         if (tree != NULL) {
1362                 if(rem != 4) {
1363                         proto_tree_add_text(tree, tvb, offset, rem,
1364                             "Error processing ER HOP AS TLV: length is %d, should be 4",
1365                             rem);
1366                         return;
1367                 }
1368                 ti = proto_tree_add_text(tree, tvb, offset, rem, "ER HOP AS");
1369                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1370
1371                 if(val_tree != NULL) {
1372                         proto_tree_add_item(val_tree, hf_ldp_tlv_er_hop_loose,
1373                                            tvb, offset, 2, FALSE);
1374                         offset += 2;
1375                         proto_tree_add_item(val_tree, hf_ldp_tlv_er_hop_as,
1376                                            tvb, offset, 2, FALSE);
1377                 }
1378         }
1379 }
1380
1381 static void
1382 dissect_tlv_er_hop_lspid(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1383 {
1384         proto_tree *ti = NULL, *val_tree = NULL;
1385
1386         if (tree != NULL) {
1387                 if(rem != 8) {
1388                         proto_tree_add_text(tree, tvb, offset, rem,
1389                             "Error processing ER HOP LSPID TLV: length is %d, should be 8",
1390                             rem);
1391                         return;
1392                 }
1393                 ti = proto_tree_add_text(tree, tvb, offset, rem, "ER HOP LSPID");
1394                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1395
1396                 if(val_tree != NULL) {
1397                         proto_tree_add_item(val_tree, hf_ldp_tlv_er_hop_loose,
1398                                            tvb, offset, 2, FALSE);
1399                         offset += 2;
1400                         proto_tree_add_item(val_tree, hf_ldp_tlv_er_hop_cr_lsp,
1401                                            tvb, offset, 2, FALSE);
1402                         offset += 2;
1403                         proto_tree_add_item(val_tree, hf_ldp_tlv_er_hop_ldpid,
1404                                            tvb, offset, 4, FALSE);
1405                 }
1406         }
1407 }
1408
1409 static void
1410 dissect_tlv_traffic(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1411 {
1412         proto_tree *ti = NULL, *val_tree = NULL;
1413         guint8  val_8;
1414         float   val_f;
1415         proto_item *pi;
1416
1417         if (tree != NULL) {
1418                 if(rem != 24) {
1419                         proto_tree_add_text(tree, tvb, offset, rem,
1420                             "Error processing Traffic Parameters TLV: length is %d, should be 24",
1421                             rem);
1422                         return;
1423                 }
1424                 ti = proto_tree_add_text(tree, tvb, offset, rem, "Traffic parameters");
1425                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1426
1427                 if(val_tree != NULL) {
1428                         /* flags */
1429                         proto_tree_add_item(val_tree, hf_ldp_tlv_flags_reserv, tvb, offset, 1, FALSE);
1430                         proto_tree_add_item(val_tree, hf_ldp_tlv_flags_weight, tvb, offset, 1, FALSE);
1431                         proto_tree_add_item(val_tree, hf_ldp_tlv_flags_ebs, tvb, offset, 1, FALSE);
1432                         proto_tree_add_item(val_tree, hf_ldp_tlv_flags_cbs, tvb, offset, 1, FALSE);
1433                         proto_tree_add_item(val_tree, hf_ldp_tlv_flags_cdr, tvb, offset, 1, FALSE);
1434                         proto_tree_add_item(val_tree, hf_ldp_tlv_flags_pbs, tvb, offset, 1, FALSE);
1435                         proto_tree_add_item(val_tree, hf_ldp_tlv_flags_pdr, tvb, offset, 1, FALSE);
1436
1437                         offset ++;
1438                         /* frequency */
1439                         proto_tree_add_item(val_tree, hf_ldp_tlv_frequency, tvb, offset, 1, FALSE);
1440                         offset ++;
1441
1442                         /* reserver byte */
1443                         offset ++;
1444
1445                         /* weight */
1446                         pi = proto_tree_add_item(val_tree, hf_ldp_tlv_weight, tvb, offset, 1, FALSE);
1447                         val_8 = tvb_get_guint8(tvb, offset);
1448                         if (val_8 == 0)
1449                                 proto_item_set_text(pi, "Weight: Not applicable");
1450                         offset ++;
1451
1452                         /* PDR */
1453                         val_f = tvb_get_ntohieee_float (tvb, offset);
1454                         proto_tree_add_double_format(val_tree, hf_ldp_tlv_pdr, tvb, offset,
1455                                                     4, val_f, "PDR: %.10g Bps", val_f);
1456                         offset += 4;
1457                         /* PBS */
1458                         val_f = tvb_get_ntohieee_float (tvb, offset);
1459                         proto_tree_add_double_format(val_tree, hf_ldp_tlv_pbs, tvb, offset,
1460                                                     4, val_f, "PBS: %.10g Bytes", val_f);
1461                         offset += 4;
1462
1463                         /* CDR */
1464                         val_f = tvb_get_ntohieee_float (tvb, offset);
1465                         proto_tree_add_double_format(val_tree, hf_ldp_tlv_cdr, tvb, offset,
1466                                                     4, val_f, "CDR: %.10g Bps", val_f);
1467                         offset += 4;
1468
1469                         /* CBS */
1470                         val_f = tvb_get_ntohieee_float (tvb, offset);
1471                         proto_tree_add_double_format(val_tree, hf_ldp_tlv_cbs, tvb, offset,
1472                                                     4, val_f, "CBS: %.10g Bytes", val_f);
1473                         offset += 4;
1474
1475                         /* EBS */
1476                         val_f = tvb_get_ntohieee_float (tvb, offset);
1477                         proto_tree_add_double_format(val_tree, hf_ldp_tlv_ebs, tvb, offset,
1478                                                     4, val_f, "EBS: %.10g Bytes", val_f);
1479
1480                 }
1481         }
1482 }
1483
1484 static void
1485 dissect_tlv_route_pinning(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1486 {
1487         proto_tree *ti = NULL, *val_tree = NULL;
1488
1489         if (tree != NULL) {
1490                 if(rem != 4) {
1491                         proto_tree_add_text(tree, tvb, offset, rem,
1492                             "Error processing Route Pinning TLV: length is %d, should be 4",
1493                             rem);
1494                         return;
1495                 }
1496                 ti = proto_tree_add_text(tree, tvb, offset, rem, "Route Pinning");
1497                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1498
1499                 if(val_tree != NULL) {
1500                         proto_tree_add_item(val_tree, hf_ldp_tlv_route_pinning,
1501                                            tvb, offset, 4, FALSE);
1502                 }
1503         }
1504 }
1505
1506
1507 static void
1508 dissect_tlv_resource_class(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1509 {
1510         proto_tree *ti = NULL, *val_tree = NULL;
1511
1512         if (tree != NULL) {
1513                 if(rem != 4) {
1514                         proto_tree_add_text(tree, tvb, offset, rem,
1515                             "Error processing Resource Class TLV: length is %d, should be 4",
1516                             rem);
1517                         return;
1518                 }
1519                 ti = proto_tree_add_text(tree, tvb, offset, rem, "Resource Class");
1520                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1521
1522                 if(val_tree != NULL) {
1523                         proto_tree_add_item(val_tree, hf_ldp_tlv_resource_class,
1524                                            tvb, offset, 4, FALSE);
1525                 }
1526         }
1527 }
1528
1529
1530 static void
1531 dissect_tlv_preemption(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1532 {
1533         proto_tree *ti = NULL, *val_tree = NULL;
1534
1535         if (tree != NULL) {
1536                 if(rem != 4) {
1537                         proto_tree_add_text(tree, tvb, offset, rem,
1538                             "Error processing Preemption TLV: length is %d, should be 4",
1539                             rem);
1540                         return;
1541                 }
1542                 ti = proto_tree_add_text(tree, tvb, offset, rem, "Preemption");
1543                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1544
1545                 if(val_tree != NULL) {
1546                         proto_tree_add_item(val_tree, hf_ldp_tlv_set_prio,
1547                                            tvb, offset, 1, FALSE);
1548                         offset += 1;
1549                         proto_tree_add_item(val_tree, hf_ldp_tlv_hold_prio,
1550                                            tvb, offset, 1, FALSE);
1551                 }
1552         }
1553 }
1554
1555 static int
1556 dissect_tlv(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem);
1557
1558 static void
1559 dissect_tlv_er(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1560 {
1561         proto_tree *ti = NULL, *val_tree = NULL;
1562         int len;
1563
1564         if (tree != NULL) {
1565                 ti = proto_tree_add_text(tree, tvb, offset, rem, "Explicit route");
1566                 val_tree = proto_item_add_subtree(ti, ett_ldp_tlv_val);
1567
1568                 if(val_tree != NULL) {
1569                         len = 0;
1570                         while (rem > 0) {
1571                                 len = dissect_tlv (tvb, offset, val_tree, rem);
1572                                 offset += len;
1573                                 rem -= len;
1574                         }
1575                 }
1576         }
1577 }
1578
1579
1580 /* Dissect a TLV and return the number of bytes consumed ... */
1581
1582 static int
1583 dissect_tlv(tvbuff_t *tvb, guint offset, proto_tree *tree, int rem)
1584 {
1585         guint16 type, typebak;
1586         int length;
1587         proto_tree *ti = NULL, *tlv_tree = NULL;
1588
1589         length=tvb_reported_length_remaining(tvb, offset);
1590         rem=MIN(rem, length);
1591
1592         if( rem < 4 ) {/*chk for minimum header*/
1593                 if(tree)
1594                         proto_tree_add_text(tree, tvb, offset, rem,
1595                             "Error processing TLV: length is %d, should be >= 4",
1596                             rem);
1597                 return rem;
1598         }
1599         type = tvb_get_ntohs(tvb, offset) & 0x3FFF;
1600
1601         length = tvb_get_ntohs(tvb, offset + 2),
1602         rem -= 4; /*do not count header*/
1603         length = MIN(length, rem);  /* Don't go haywire if a problem ... */
1604
1605         if (tree != NULL) {
1606                 /*chk for vendor-private*/
1607                 if(type>=TLV_VENDOR_PRIVATE_START && type<=TLV_VENDOR_PRIVATE_END){
1608                         typebak=type;           /*keep type*/
1609                         type=TLV_VENDOR_PRIVATE_START;
1610
1611                 /*chk for experimental*/
1612                 } else if(type>=TLV_EXPERIMENTAL_START && type<=TLV_EXPERIMENTAL_END){
1613                         typebak=type;           /*keep type*/
1614                         type=TLV_EXPERIMENTAL_START;
1615                 }
1616
1617                 ti = proto_tree_add_text(tree, tvb, offset, length + 4, "%s",
1618                         val_to_str(type, tlv_type_names, "Unknown TLV type (0x%04X)"));
1619                 tlv_tree = proto_item_add_subtree(ti, ett_ldp_tlv);
1620                 if(tlv_tree == NULL) return length+4;
1621
1622                 proto_tree_add_item(tlv_tree, hf_ldp_tlv_unknown, tvb, offset, 1, FALSE);
1623
1624                 proto_tree_add_uint_format(tlv_tree, hf_ldp_tlv_type, tvb, offset, 2, type, "TLV Type: %s (0x%X)", val_to_str(type, tlv_type_names, "Unknown TLV type"), type );
1625
1626                 proto_tree_add_item(tlv_tree, hf_ldp_tlv_len, tvb, offset + 2, 2, FALSE);
1627
1628                 switch (type) {
1629
1630                 case TLV_FEC:
1631                         dissect_tlv_fec(tvb, offset + 4, tlv_tree, length);
1632                         break;
1633
1634                 case TLV_ADDRESS_LIST:
1635                         dissect_tlv_address_list(tvb, offset + 4, tlv_tree, length);
1636                         break;
1637
1638                 case TLV_HOP_COUNT:
1639                         if( length != 1 ) /*error, only one byte*/
1640                                 proto_tree_add_text(tlv_tree, tvb, offset + 4,length,
1641                                     "Error processing Hop Count TLV: length is %d, should be 1",
1642                                     length);
1643                         else
1644                                 proto_tree_add_item(tlv_tree, hf_ldp_tlv_hc_value, tvb,offset + 4, length, FALSE);
1645                         break;
1646
1647                 case TLV_PATH_VECTOR:
1648                         dissect_tlv_path_vector(tvb, offset + 4, tlv_tree, length);
1649                         break;
1650
1651                 case TLV_GENERIC_LABEL:
1652                         if( length != 4 ) /*error, need only label*/
1653                                 proto_tree_add_text(tlv_tree, tvb, offset + 4, length,
1654                                     "Error processing Generic Label TLV: length is %d, should be 4",
1655                                     length);
1656                         else {
1657                                 guint32 label=tvb_get_ntohl(tvb, offset+4) & 0x000FFFFF;
1658
1659                                 proto_tree_add_uint_format(tlv_tree, hf_ldp_tlv_generic_label,
1660                                         tvb, offset+4, length, label, "Generic Label: %u", label);
1661                         }
1662                         break;
1663
1664                 case TLV_ATM_LABEL:
1665                         dissect_tlv_atm_label(tvb, offset + 4, tlv_tree, length);
1666                         break;
1667
1668                 case TLV_FRAME_LABEL:
1669                         dissect_tlv_frame_label(tvb, offset + 4, tlv_tree, length);
1670                         break;
1671
1672                 case TLV_STATUS:
1673                         dissect_tlv_status(tvb, offset + 4, tlv_tree, length);
1674                         break;
1675
1676                 case TLV_EXTENDED_STATUS:
1677                         if( length != 4 ) /*error, need only status_code(guint32)*/
1678                                 proto_tree_add_text(tlv_tree, tvb, offset + 4, length,
1679                                     "Error processing Extended Status TLV: length is %d, should be 4",
1680                                     length);
1681                         else {
1682                                 proto_tree_add_item(tlv_tree, hf_ldp_tlv_extstatus_data, tvb, offset + 4, length, FALSE);
1683                         }
1684                         break;
1685
1686                 case TLV_RETURNED_PDU:
1687                         dissect_tlv_returned_pdu(tvb, offset + 4, tlv_tree, length);
1688                         break;
1689
1690                 case TLV_RETURNED_MESSAGE:
1691                         dissect_tlv_returned_message(tvb, offset + 4, tlv_tree, length);
1692                         break;
1693
1694                 case TLV_COMMON_HELLO_PARMS:
1695                         dissect_tlv_common_hello_parms(tvb, offset + 4, tlv_tree, length);
1696                         break;
1697
1698                 case TLV_IPV4_TRANSPORT_ADDRESS:
1699                         if( length != 4 ) /*error, need only ipv4*/
1700                                 proto_tree_add_text(tlv_tree, tvb, offset + 4, length,
1701                                     "Error processing IPv4 Transport Address TLV: length is %d, should be 4",
1702                                     length);
1703                         else {
1704                                 proto_tree_add_item(tlv_tree, hf_ldp_tlv_ipv4_taddr, tvb, offset + 4, 4, FALSE);
1705                         }
1706                         break;
1707
1708                 case TLV_CONFIGURATION_SEQNO:
1709                         if( length != 4 ) /*error, need only seq_num(guint32)*/
1710                                 proto_tree_add_text(tlv_tree, tvb, offset + 4, length,
1711                                     "Error processing Configuration Sequence Number TLV: length is %d, should be 4",
1712                                     length);
1713                         else {
1714                                 proto_tree_add_item(tlv_tree, hf_ldp_tlv_config_seqno, tvb, offset + 4, 4, FALSE);
1715                         }
1716                         break;
1717
1718                 case TLV_IPV6_TRANSPORT_ADDRESS:
1719                         if( length != 16 ) /*error, need only ipv6*/
1720                                 proto_tree_add_text(tlv_tree, tvb, offset + 4, length,
1721                                     "Error processing IPv6 Transport Address TLV: length is %d, should be 16",
1722                                     length);
1723                         else {
1724                                 proto_tree_add_item(tlv_tree, hf_ldp_tlv_ipv6_taddr, tvb, offset + 4, 16, FALSE);
1725                         }
1726                         break;
1727
1728                 case TLV_COMMON_SESSION_PARMS:
1729                         dissect_tlv_common_session_parms(tvb, offset + 4, tlv_tree, length);
1730                         break;
1731
1732                 case TLV_ATM_SESSION_PARMS:
1733                         dissect_tlv_atm_session_parms(tvb, offset + 4, tlv_tree, length);
1734                         break;
1735
1736                 case TLV_FRAME_RELAY_SESSION_PARMS:
1737                         dissect_tlv_frame_relay_session_parms(tvb, offset + 4, tlv_tree, length);
1738                         break;
1739
1740                 case TLV_LABEL_REQUEST_MESSAGE_ID:
1741                         if( length != 4 ) /*error, need only one msgid*/
1742                                 proto_tree_add_text(tlv_tree, tvb, offset + 4, length,
1743                                     "Error processing Label Request Message ID TLV: length is %d, should be 4",
1744                                     length);
1745                         else
1746                                 proto_tree_add_item(tlv_tree, hf_ldp_tlv_lbl_req_msg_id, tvb,offset + 4,length, FALSE);
1747                         break;
1748
1749                 case TLV_LSPID:
1750                         dissect_tlv_lspid(tvb, offset + 4, tlv_tree, length);
1751                         break;
1752
1753                 case TLV_ER:
1754                         dissect_tlv_er(tvb, offset + 4, tlv_tree, length);
1755                         break;
1756
1757                 case TLV_ER_HOP_IPV4:
1758                         dissect_tlv_er_hop_ipv4(tvb, offset + 4, tlv_tree, length);
1759                         break;
1760
1761                 case TLV_ER_HOP_IPV6:
1762                         dissect_tlv_er_hop_ipv6(tvb, offset +4, tlv_tree, length);
1763                         break;
1764
1765                 case TLV_ER_HOP_AS:
1766                         dissect_tlv_er_hop_as(tvb, offset + 4, tlv_tree, length);
1767                         break;
1768
1769                 case TLV_ER_HOP_LSPID:
1770                         dissect_tlv_er_hop_lspid(tvb, offset +4, tlv_tree, length);
1771                         break;
1772
1773                 case TLV_TRAFFIC_PARAM:
1774                         dissect_tlv_traffic(tvb, offset +4, tlv_tree, length);
1775                         break;
1776
1777                 case TLV_PREEMPTION:
1778                         dissect_tlv_preemption(tvb, offset +4, tlv_tree, length);
1779                         break;
1780
1781                 case TLV_RESOURCE_CLASS:
1782                         dissect_tlv_resource_class(tvb, offset +4, tlv_tree, length);
1783                         break;
1784
1785                 case TLV_ROUTE_PINNING:
1786                         dissect_tlv_route_pinning(tvb, offset +4, tlv_tree, length);
1787                         break;
1788
1789                 case TLV_VENDOR_PRIVATE_START:
1790                         if( length < 4 ) /*error, at least Vendor ID*/
1791                                 proto_tree_add_text(tlv_tree, tvb, offset + 4, length,
1792                                     "Error processing Vendor Private Start TLV: length is %d, should be >= 4",
1793                                     length);
1794                         else {
1795                                 proto_tree_add_item(tlv_tree, hf_ldp_tlv_vendor_id, tvb,offset + 4, 4, FALSE);
1796                                 if( length > 4 )  /*have data*/
1797                                         proto_tree_add_text(tlv_tree, tvb, offset + 8, length-4,"Data");
1798                         }
1799                         break;
1800
1801                 case TLV_EXPERIMENTAL_START:
1802                         if( length < 4 ) /*error, at least Experiment ID*/
1803                                 proto_tree_add_text(tlv_tree, tvb, offset + 4, length,
1804                                     "Error processing Experimental Start TLV: length is %d, should be >= 4",
1805                                     length);
1806                         else {
1807                                 proto_tree_add_item(tlv_tree, hf_ldp_tlv_experiment_id, tvb,offset + 4, 4, FALSE);
1808                                 if( length > 4 )  /*have data*/
1809                                         proto_tree_add_text(tlv_tree, tvb, offset + 8, length-4,"Data");
1810                         }
1811                         break;
1812
1813                 default:
1814                         proto_tree_add_item(tlv_tree, hf_ldp_tlv_value, tvb, offset + 4, length, FALSE);
1815                         break;
1816                 }
1817         }
1818
1819         return length + 4;  /* Length of the value field + header */
1820 }
1821
1822
1823 /* Dissect a Message and return the number of bytes consumed ... */
1824
1825 static int
1826 dissect_msg(tvbuff_t *tvb, guint offset, packet_info *pinfo, proto_tree *tree)
1827 {
1828         guint16 type, typebak;
1829         guint8  extra=0;
1830         int length, rem, ao=0, co;
1831         proto_tree *ti = NULL, *msg_tree = NULL;
1832
1833         rem=tvb_reported_length_remaining(tvb, offset);
1834
1835         if( rem < 8 ) {/*chk for minimum header = type + length + msg_id*/
1836                 if( check_col(pinfo->cinfo, COL_INFO) )
1837                         col_append_fstr(pinfo->cinfo, COL_INFO, "Bad Message");
1838                 if(tree)
1839                         proto_tree_add_text(tree, tvb, offset, rem,
1840                             "Error processing Message: length is %d, should be >= 8",
1841                             rem);
1842                 return rem;
1843         }
1844         type = tvb_get_ntohs(tvb, offset) & 0x7FFF;
1845
1846         /*chk for vendor-private*/
1847         if(type>=LDP_VENDOR_PRIVATE_START && type<=LDP_VENDOR_PRIVATE_END){
1848                 typebak=type;           /*keep type*/
1849                 type=LDP_VENDOR_PRIVATE_START;
1850                 extra=4;
1851         /*chk for experimental*/
1852         } else if(type>=LDP_EXPERIMENTAL_MESSAGE_START && type<=LDP_EXPERIMENTAL_MESSAGE_END){
1853                 typebak=type;           /*keep type*/
1854                 type=LDP_EXPERIMENTAL_MESSAGE_START;
1855                 extra=4;
1856         }
1857
1858         if( (length = tvb_get_ntohs(tvb, offset + 2)) < (4+extra) ) {/*not enough data for type*/
1859                 if( check_col(pinfo->cinfo, COL_INFO) )
1860                         col_append_fstr(pinfo->cinfo, COL_INFO, "Bad Message Length ");
1861                 if(tree)
1862                         proto_tree_add_text(tree, tvb, offset, rem,
1863                             "Error processing Message Length: length is %d, should be >= %u",
1864                             length, 4+extra);
1865                 return rem;
1866         }
1867         rem -= 4;
1868         length = MIN(length, rem);  /* Don't go haywire if a problem ... */
1869
1870         if( check_col(pinfo->cinfo, COL_INFO) ){
1871                 col_append_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(type, ldp_message_types, "Unknown Message (0x%04X)"));
1872         }
1873
1874         if( tree ){
1875                 ti = proto_tree_add_text(tree, tvb, offset, length + 4, "%s",
1876                         val_to_str(type, ldp_message_types, "Unknown Message type (0x%04X)"));
1877                 msg_tree = proto_item_add_subtree(ti, ett_ldp_message);
1878                 if(msg_tree == NULL) return length+4;
1879
1880                 proto_tree_add_item(msg_tree, hf_ldp_msg_ubit, tvb, offset, 1, FALSE);
1881
1882                 type=tvb_get_ntohs(tvb, offset)&0x7FFF;
1883                 proto_tree_add_uint_format(msg_tree, hf_ldp_msg_type, tvb, offset, 2, type, "Message Type: %s (0x%X)", val_to_str(type, ldp_message_types,"Unknown Message Type"), type);
1884
1885                 proto_tree_add_item(msg_tree, hf_ldp_msg_len, tvb, offset+2, 2, FALSE);
1886                 proto_tree_add_item(msg_tree, hf_ldp_msg_id, tvb, offset+4, 4, FALSE);
1887                 if(extra){
1888                         int hf_tmp=0;
1889
1890                         switch(type){
1891                                 case LDP_VENDOR_PRIVATE_START:
1892                                         hf_tmp=hf_ldp_msg_vendor_id;
1893                                         break;
1894                                 case LDP_EXPERIMENTAL_MESSAGE_START:
1895                                         hf_tmp=hf_ldp_msg_experiment_id;
1896                                         break;
1897                         }
1898                         proto_tree_add_item(msg_tree, hf_tmp, tvb, offset+8, extra, FALSE);
1899                 }
1900         }
1901
1902         offset += (8+extra);
1903         length -= (4+extra);
1904
1905         if( tree )
1906                 while( (length-ao) > 0 ) {
1907                         co=dissect_tlv(tvb, offset, msg_tree, length-ao);
1908                         offset += co;
1909                         ao += co;
1910                 }
1911
1912         return length+8+extra;
1913 }
1914
1915 /* Dissect a PDU */
1916 static void
1917 dissect_ldp_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1918 {
1919         int offset = 0, co;
1920         int rem, length;
1921         proto_tree *ti=NULL, *pdu_tree = NULL;
1922
1923         if (check_col(pinfo->cinfo, COL_PROTOCOL))
1924                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "LDP");
1925
1926         if (check_col(pinfo->cinfo, COL_INFO))
1927                 col_clear(pinfo->cinfo, COL_INFO);
1928
1929         if( tree ){
1930                 ti=proto_tree_add_item(tree, proto_ldp, tvb, 0, -1, FALSE);
1931                 pdu_tree = proto_item_add_subtree(ti, ett_ldp);
1932
1933                 proto_tree_add_item(pdu_tree, hf_ldp_version, tvb, offset, 2, FALSE);
1934         }
1935
1936         length = tvb_get_ntohs(tvb, offset+2);
1937         if( tree )
1938                 proto_tree_add_uint(pdu_tree, hf_ldp_pdu_len, tvb, offset+2, 2, length);
1939
1940         length += 4;    /* add the version and type sizes */
1941         rem = tvb_reported_length_remaining(tvb, offset);
1942         if (length < rem)
1943                 tvb_set_reported_length(tvb, length);
1944
1945         if( tree ){
1946                 proto_tree_add_item(pdu_tree, hf_ldp_lsr, tvb, offset+4, 4, FALSE);
1947                 proto_tree_add_item(pdu_tree, hf_ldp_ls_id, tvb, offset+8, 2, FALSE);
1948         }
1949         offset += 10;
1950
1951         while( tvb_reported_length_remaining(tvb, offset) > 0 ) {
1952                 co=dissect_msg(tvb, offset, pinfo, pdu_tree);
1953                 offset += co;
1954         }
1955 }
1956
1957 static int
1958 dissect_ldp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1959 {
1960         /*
1961          * Make sure the first PDU has a version number of 1;
1962          * if not, reject this, so we don't get confused by
1963          * packets that happen to be going to or from the
1964          * LDP port but that aren't LDP packets.
1965          */
1966         if (!tvb_bytes_exist(tvb, 0, 2)) {
1967                 /*
1968                  * Not enough information to tell.
1969                  */
1970                 return 0;
1971         }
1972         if (tvb_get_ntohs(tvb, 0) != 1) {
1973                 /*
1974                  * Not version 1.
1975                  */
1976                 return 0;
1977         }
1978
1979         dissect_ldp_pdu(tvb, pinfo, tree);
1980
1981         /*
1982          * XXX - return minimum of this and the length of the PDU?
1983          */
1984         return tvb_length(tvb);
1985 }
1986
1987 static int
1988 dissect_ldp_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1989 {
1990         volatile gboolean first = TRUE;
1991         volatile int offset = 0;
1992         int length_remaining;
1993         guint16 plen;
1994         int length;
1995         tvbuff_t *next_tvb;
1996
1997         while (tvb_reported_length_remaining(tvb, offset) != 0) {
1998                 length_remaining = tvb_length_remaining(tvb, offset);
1999
2000                 /*
2001                  * Make sure the first PDU has a version number of 1;
2002                  * if not, reject this, so we don't get confused by
2003                  * packets that happen to be going to or from the
2004                  * LDP port but that aren't LDP packets.
2005                  *
2006                  * XXX - this means we can't handle an LDP PDU of which
2007                  * only one byte appears in a TCP segment.  If that's
2008                  * a problem, we'll either have to completely punt on
2009                  * rejecting non-LDP packets, or will have to assume
2010                  * that if we have only one byte, it's an LDP packet.
2011                  */
2012                 if (first) {
2013                         if (length_remaining < 2) {
2014                                 /*
2015                                  * Not enough information to tell.
2016                                  */
2017                                 return 0;
2018                         }
2019                         if (tvb_get_ntohs(tvb, offset) != 1) {
2020                                 /*
2021                                  * Not version 1.
2022                                  */
2023                                 return 0;
2024                         }
2025                         first = FALSE;
2026                 }
2027
2028                 /*
2029                  * Can we do reassembly?
2030                  */
2031                 if (ldp_desegment && pinfo->can_desegment) {
2032                         /*
2033                          * Yes - is the LDP header split across segment
2034                          * boundaries?
2035                          */
2036                         if (length_remaining < 4) {
2037                                 /*
2038                                  * Yes.  Tell the TCP dissector where
2039                                  * the data for this message starts in
2040                                  * the data it handed us, and how many
2041                                  * more bytes we need, and return.
2042                                  */
2043                                 pinfo->desegment_offset = offset;
2044                                 pinfo->desegment_len = 4 - length_remaining;
2045                                 return -pinfo->desegment_len;
2046                         }
2047                 }
2048
2049                 /*
2050                  * Get the length of the rest of the LDP packet.
2051                  * XXX - check for a version of 1 first?
2052                  */
2053                 plen = tvb_get_ntohs(tvb, offset + 2);
2054
2055                 /*
2056                  * Can we do reassembly?
2057                  */
2058                 if (ldp_desegment && pinfo->can_desegment) {
2059                         /*
2060                          * Yes - is the LDP packet split across segment
2061                          * boundaries?
2062                          */
2063                         if (length_remaining < plen + 4) {
2064                                 /*
2065                                  * Yes.  Tell the TCP dissector where the
2066                                  * data for this message starts in the data
2067                                  * it handed us, and how many more bytes we
2068                                  * need, and return.
2069                                  */
2070                                 pinfo->desegment_offset = offset;
2071                                 pinfo->desegment_len =
2072                                     (plen + 4) - length_remaining;
2073                                 return -pinfo->desegment_len;
2074                         }
2075                 }
2076
2077                 /*
2078                  * Construct a tvbuff containing the amount of the payload
2079                  * we have available.  Make its reported length the
2080                  * amount of data in the DNS-over-TCP packet.
2081                  *
2082                  * XXX - if reassembly isn't enabled. the subdissector
2083                  * will throw a BoundsError exception, rather than a
2084                  * ReportedBoundsError exception.  We really want
2085                  * a tvbuff where the length is "length", the reported
2086                  * length is "plen + 4", and the "if the snapshot length
2087                  * were infinite" length is the minimum of the
2088                  * reported length of the tvbuff handed to us and "plen+4",
2089                  * with a new type of exception thrown if the offset is
2090                  * within the reported length but beyond that third length,
2091                  * with that exception getting the "Unreassembled Packet"
2092                  * error.
2093                  */
2094                 length = length_remaining;
2095                 if (length > plen + 4)
2096                         length = plen + 4;
2097                 next_tvb = tvb_new_subset(tvb, offset, length, plen + 4);
2098
2099                 /*
2100                  * Dissect the LDP packet.
2101                  *
2102                  * Catch the ReportedBoundsError exception; if this
2103                  * particular message happens to get a ReportedBoundsError
2104                  * exception, that doesn't mean that we should stop
2105                  * dissecting LDP messages within this frame or chunk of
2106                  * reassembled data.
2107                  *
2108                  * If it gets a BoundsError, we can stop, as there's nothing
2109                  * more to see, so we just re-throw it.
2110                  */
2111                 TRY {
2112                         dissect_ldp_pdu(next_tvb, pinfo, tree);
2113                 }
2114                 CATCH(BoundsError) {
2115                         RETHROW;
2116                 }
2117                 CATCH(ReportedBoundsError) {
2118                         show_reported_bounds_error(tvb, pinfo, tree);
2119                 }
2120                 ENDTRY;
2121
2122                 /*
2123                  * Skip the LDP header and the payload.
2124                  */
2125                 offset += plen + 4;
2126         }
2127         return tvb_length(tvb);
2128 }
2129
2130 /* Register all the bits needed with the filtering engine */
2131
2132 void
2133 proto_register_ldp(void)
2134 {
2135   static hf_register_info hf[] = {
2136     { &hf_ldp_req,
2137       /* Change the following to the type you need */
2138       { "Request", "ldp.req", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "", HFILL }},
2139
2140     { &hf_ldp_rsp,
2141       { "Response", "ldp.rsp", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "", HFILL }},
2142
2143     { &hf_ldp_version,
2144       { "Version", "ldp.hdr.version", FT_UINT16, BASE_DEC, NULL, 0x0, "LDP Version Number", HFILL }},
2145
2146     { &hf_ldp_pdu_len,
2147       { "PDU Length", "ldp.hdr.pdu_len", FT_UINT16, BASE_DEC, NULL, 0x0, "LDP PDU Length", HFILL }},
2148
2149     { &hf_ldp_lsr,
2150       { "LSR ID", "ldp.hdr.ldpid.lsr", FT_IPv4, BASE_HEX, NULL, 0x0, "LDP Label Space Router ID", HFILL }},
2151
2152     { &hf_ldp_ls_id,
2153       { "Label Space ID", "ldp.hdr.ldpid.lsid", FT_UINT16, BASE_DEC, NULL, 0, "LDP Label Space ID", HFILL }},
2154
2155     { &hf_ldp_msg_ubit,
2156       { "U bit", "ldp.msg.ubit", FT_BOOLEAN, 8, TFS(&ldp_message_ubit), 0x80, "Unknown Message Bit", HFILL }},
2157
2158     { &hf_ldp_msg_type,
2159       { "Message Type", "ldp.msg.type", FT_UINT16, BASE_HEX, VALS(ldp_message_types), 0x7FFF, "LDP message type", HFILL }},
2160
2161     { &hf_ldp_msg_len,
2162       { "Message Length", "ldp.msg.len", FT_UINT16, BASE_DEC, NULL, 0x0, "LDP Message Length (excluding message type and len)", HFILL }},
2163
2164     { &hf_ldp_msg_id,
2165       { "Message ID", "ldp.msg.id", FT_UINT32, BASE_HEX, NULL, 0x0, "LDP Message ID", HFILL }},
2166
2167     { &hf_ldp_msg_vendor_id,
2168       { "Vendor ID", "ldp.msg.vendor.id", FT_UINT32, BASE_HEX, NULL, 0x0, "LDP Vendor-private Message ID", HFILL }},
2169
2170     { &hf_ldp_msg_experiment_id,
2171       { "Experiment ID", "ldp.msg.experiment.id", FT_UINT32, BASE_HEX, NULL, 0x0, "LDP Experimental Message ID", HFILL }},
2172
2173     { &hf_ldp_tlv_unknown,
2174       { "TLV Unknown bits", "ldp.msg.tlv.unknown", FT_UINT8, BASE_HEX, VALS(tlv_unknown_vals), 0xC0, "TLV Unknown bits Field", HFILL }},
2175
2176     { &hf_ldp_tlv_type,
2177       { "TLV Type", "ldp.msg.tlv.type", FT_UINT16, BASE_HEX, VALS(tlv_type_names), 0x3FFF, "TLV Type Field", HFILL }},
2178
2179     { &hf_ldp_tlv_len,
2180       {"TLV Length", "ldp.msg.tlv.len", FT_UINT16, BASE_DEC, NULL, 0x0, "TLV Length Field", HFILL }},
2181
2182     { &hf_ldp_tlv_value,
2183       { "TLV Value", "ldp.msg.tlv.value", FT_BYTES, BASE_NONE, NULL, 0x0, "TLV Value Bytes", HFILL }},
2184
2185     { &hf_ldp_tlv_val_hold,
2186       { "Hold Time", "ldp.msg.tlv.hello.hold", FT_UINT16, BASE_DEC, NULL, 0x0, "Hello Common Parameters Hold Time", HFILL }},
2187
2188     { &hf_ldp_tlv_val_target,
2189       { "Targeted Hello", "ldp.msg.tlv.hello.targeted", FT_BOOLEAN, 16, TFS(&hello_targeted_vals), 0x8000, "Hello Common Parameters Targeted Bit", HFILL }},
2190
2191     { &hf_ldp_tlv_val_request,
2192       { "Hello Requested", "ldp,msg.tlv.hello.requested", FT_BOOLEAN, 16, TFS(&hello_requested_vals), 0x4000, "Hello Common Parameters Hello Requested Bit", HFILL }},
2193
2194     { &hf_ldp_tlv_val_res,
2195       { "Reserved", "ldp.msg.tlv.hello.res", FT_UINT16, BASE_HEX, NULL, 0x3FFF, "Hello Common Parameters Reserved Field", HFILL }},
2196
2197     { &hf_ldp_tlv_ipv4_taddr,
2198       { "IPv4 Transport Address", "ldp.msg.tlv.ipv4.taddr", FT_IPv4, BASE_DEC, NULL, 0x0, "IPv4 Transport Address", HFILL }},
2199
2200     { &hf_ldp_tlv_config_seqno,
2201       { "Configuration Sequence Number", "ldp.msg.tlv.hello.cnf_seqno", FT_UINT32, BASE_DEC, NULL, 0x0, "Hello Configuration Sequence Number", HFILL }},
2202
2203     { &hf_ldp_tlv_ipv6_taddr,
2204       { "IPv6 Transport Address", "ldp.msg.tlv.ipv6.taddr", FT_IPv6, BASE_DEC, NULL, 0x0, "IPv6 Transport Address", HFILL }},
2205
2206     { &hf_ldp_tlv_fec_wc,
2207       { "FEC Element Type", "ldp.msg.tlv.fec.type", FT_UINT8, BASE_DEC, VALS(fec_types), 0x0, "Forwarding Equivalence Class Element Types", HFILL }},
2208
2209     { &hf_ldp_tlv_fec_af,
2210       { "FEC Element Address Type", "ldp.msg.tlv.fec.af", FT_UINT16, BASE_DEC, VALS(afn_vals), 0x0, "Forwarding Equivalence Class Element Address Family", HFILL }},
2211
2212     { &hf_ldp_tlv_fec_len,
2213       { "FEC Element Length", "ldp.msg.tlv.fec.len", FT_UINT8, BASE_DEC, NULL, 0x0, "Forwarding Equivalence Class Element Length", HFILL }},
2214
2215     { &hf_ldp_tlv_fec_pfval,
2216       { "FEC Element Prefix Value", "ldp.msg.tlv.fec.pfval", FT_STRING, BASE_NONE, NULL, 0x0, "Forwarding Equivalence Class Element Prefix", HFILL }},
2217
2218     { &hf_ldp_tlv_fec_hoval,
2219       { "FEC Element Host Address Value", "ldp.msg.tlv.fec.hoval", FT_STRING, BASE_NONE, NULL, 0x0, "Forwarding Equivalence Class Element Address", HFILL }},
2220
2221     { &hf_ldp_tlv_addrl_addr_family,
2222       { "Address Family", "ldp.msg.tlv.addrl.addr_family", FT_UINT16, BASE_DEC, VALS(afn_vals), 0x0, "Address Family List", HFILL }},
2223
2224     { &hf_ldp_tlv_addrl_addr,
2225       { "Address", "ldp.msg.tlv.addrl.addr", FT_STRING, BASE_NONE, NULL, 0x0, "Address", HFILL }},
2226
2227     { &hf_ldp_tlv_hc_value,
2228       { "Hop Count Value", "ldp.msg.tlv.hc.value", FT_UINT8, BASE_DEC, NULL, 0x0, "Hop Count", HFILL }},
2229
2230     { &hf_ldp_tlv_pv_lsrid,
2231       { "LSR Id", "ldp.msg.tlv.pv.lsrid", FT_IPv4, BASE_DEC, NULL, 0x0, "Path Vector LSR Id", HFILL }},
2232
2233     { &hf_ldp_tlv_sess_ver,
2234       { "Session Protocol Version", "ldp.msg.tlv.sess.ver", FT_UINT16, BASE_DEC, NULL, 0x0, "Common Session Parameters Protocol Version", HFILL }},
2235
2236     { &hf_ldp_tlv_sess_ka,
2237       { "Session KeepAlive Time", "ldp.msg.tlv.sess.ka", FT_UINT16, BASE_DEC, NULL, 0x0, "Common Session Parameters KeepAlive Time", HFILL }},
2238
2239     { &hf_ldp_tlv_sess_advbit,
2240       { "Session Label Advertisement Discipline", "ldp.msg.tlv.sess.advbit",
2241  FT_BOOLEAN, 8, TFS(&tlv_sess_advbit_vals), 0x80,
2242         "Common Session Parameters Label Advertisement Discipline", HFILL }},
2243
2244     { &hf_ldp_tlv_sess_ldetbit,
2245       { "Session Loop Detection", "ldp.msg.tlv.sess.ldetbit", FT_BOOLEAN, 8, TFS(&tlv_sess_ldetbit_vals), 0x40, "Common Session Parameters Loop Detection", HFILL }},
2246
2247     { &hf_ldp_tlv_sess_pvlim,
2248       { "Session Path Vector Limit", "ldp.msg.tlv.sess.pvlim", FT_UINT8, BASE_DEC, NULL, 0x0, "Common Session Parameters Path Vector Limit", HFILL }},
2249
2250     { &hf_ldp_tlv_sess_mxpdu,
2251       { "Session Max PDU Length", "ldp.msg.tlv.sess.mxpdu", FT_UINT16, BASE_DEC, NULL, 0x0, "Common Session Parameters Max PDU Length", HFILL }},
2252
2253     { &hf_ldp_tlv_sess_rxlsr,
2254       { "Session Receiver LSR Identifier", "ldp.msg.tlv.sess.rxlsr", FT_IPv4, BASE_DEC, NULL, 0x0, "Common Session Parameters LSR Identifier", HFILL }},
2255
2256     { &hf_ldp_tlv_sess_rxls,
2257       { "Session Receiver Label Space Identifier", "ldp.msg.tlv.sess.rxlsr", FT_UINT16, BASE_DEC, NULL, 0x0, "Common Session Parameters Receiver Label Space Identifier", HFILL }},
2258
2259     { &hf_ldp_tlv_sess_atm_merge,
2260       { "Session ATM Merge Parameter", "ldp.msg.tlv.sess.atm.merge", FT_UINT8, BASE_DEC, VALS(tlv_atm_merge_vals), 0xC0, "Merge ATM Session Parameters", HFILL }},
2261
2262     { &hf_ldp_tlv_sess_atm_lr,
2263       { "Number of ATM Label Ranges", "ldp.msg.tlv.sess.atm.lr", FT_UINT8, BASE_DEC, NULL, 0x3C, "Number of Label Ranges", HFILL }},
2264
2265     { &hf_ldp_tlv_sess_atm_dir,
2266       { "Directionality", "ldp.msg.tlv.sess.atm.dir", FT_BOOLEAN, 8, TFS(&tlv_atm_dirbit), 0x02, "Lablel Directionality", HFILL }},
2267
2268     { &hf_ldp_tlv_sess_atm_minvpi,
2269       { "Minimum VPI", "ldp.msg.tlv.sess.atm.minvpi", FT_UINT16, BASE_DEC, NULL, 0x0FFF, "Minimum VPI", HFILL }},
2270
2271     { &hf_ldp_tlv_sess_atm_minvci,
2272       { "Minimum VCI", "ldp.msg.tlv.sess.atm.minvci", FT_UINT16, BASE_DEC, NULL, 0x0, "Minimum VCI", HFILL }},
2273
2274     { &hf_ldp_tlv_sess_atm_maxvpi,
2275       { "Maximum VPI", "ldp.msg.tlv.sess.atm.maxvpi", FT_UINT16, BASE_DEC, NULL, 0x0FFF, "Maximum VPI", HFILL }},
2276
2277     { &hf_ldp_tlv_sess_atm_maxvci,
2278       { "Maximum VCI", "ldp.msg.tlv.sess.atm.maxvci", FT_UINT16, BASE_DEC, NULL, 0x0, "Maximum VCI", HFILL }},
2279
2280     { &hf_ldp_tlv_sess_fr_merge,
2281       { "Session Frame Relay Merge Parameter", "ldp.msg.tlv.sess.fr.merge", FT_UINT8, BASE_DEC, VALS(tlv_fr_merge_vals), 0xC0, "Merge Frame Relay Session Parameters", HFILL }},
2282
2283     { &hf_ldp_tlv_sess_fr_lr,
2284       { "Number of Frame Relay Label Ranges", "ldp.msg.tlv.sess.fr.lr", FT_UINT8, BASE_DEC, NULL, 0x3C, "Number of Label Ranges", HFILL }},
2285
2286     { &hf_ldp_tlv_sess_fr_dir,
2287       { "Directionality", "ldp.msg.tlv.sess.fr.dir", FT_BOOLEAN, 8, TFS(&tlv_atm_dirbit), 0x02, "Lablel Directionality", HFILL }},
2288
2289     { &hf_ldp_tlv_sess_fr_len,
2290       { "Number of DLCI bits", "ldp.msg.tlv.sess.fr.len", FT_UINT16, BASE_DEC, VALS(tlv_fr_len_vals), 0x0180, "DLCI Number of bits", HFILL }},
2291
2292     { &hf_ldp_tlv_sess_fr_mindlci,
2293       { "Minimum DLCI", "ldp.msg.tlv.sess.fr.mindlci", FT_UINT24, BASE_DEC, NULL, 0x7FFFFF, "Minimum DLCI", HFILL }},
2294
2295     { &hf_ldp_tlv_sess_fr_maxdlci,
2296       { "Maximum DLCI", "ldp.msg.tlv.sess.fr.maxdlci", FT_UINT24, BASE_DEC, NULL, 0x7FFFFF, "Maximum DLCI", HFILL }},
2297
2298     { &hf_ldp_tlv_lbl_req_msg_id,
2299       { "Label Request Message ID", "ldp.tlv.lbl_req_msg_id", FT_UINT32, BASE_HEX, NULL, 0x0, "Label Request Message to be aborted", HFILL }},
2300
2301     { &hf_ldp_tlv_vendor_id,
2302       { "Vendor ID", "ldp.msg.tlv.vendor_id", FT_UINT32, BASE_HEX, NULL, 0, "IEEE 802 Assigned Vendor ID", HFILL }},
2303
2304     { &hf_ldp_tlv_experiment_id,
2305       { "Experiment ID", "ldp.msg.tlv.experiment_id", FT_UINT32, BASE_HEX, NULL, 0, "Experiment ID", HFILL }},
2306
2307     { &hf_ldp_tlv_generic_label,
2308       { "Generic Label", "ldp.msg.tlv.generic.label", FT_UINT32, BASE_HEX, NULL, 0x000FFFFF, "Generic Label", HFILL }},
2309
2310     { &hf_ldp_tlv_atm_label_vbits,
2311       { "V-bits", "ldp.msg.tlv.atm.label.vbits", FT_UINT8, BASE_HEX, VALS(tlv_atm_vbits_vals), 0x30, "ATM Label V Bits", HFILL }},
2312
2313     { &hf_ldp_tlv_atm_label_vpi,
2314       { "VPI", "ldp.msg.tlv.atm.label.vpi", FT_UINT16, BASE_DEC, NULL, 0x0FFF, "ATM Label VPI", HFILL }},
2315
2316     { &hf_ldp_tlv_atm_label_vci,
2317       { "VCI", "ldp.msg.tlv.atm.label.vci", FT_UINT16, BASE_DEC, NULL, 0, "ATM Label VCI", HFILL }},
2318
2319     { &hf_ldp_tlv_fr_label_len,
2320       { "Number of DLCI bits", "ldp.msg.tlv.fr.label.len", FT_UINT16, BASE_DEC, VALS(tlv_fr_len_vals), 0x0180, "DLCI Number of bits", HFILL }},
2321
2322     { &hf_ldp_tlv_fr_label_dlci,
2323       { "DLCI", "ldp.msg.tlv.fr.label.dlci", FT_UINT24, BASE_DEC, NULL, 0x7FFFFF, "FRAME RELAY Label DLCI", HFILL }},
2324
2325     { &hf_ldp_tlv_status_ebit,
2326       { "E Bit", "ldp.msg.tlv.status.ebit", FT_BOOLEAN, 8, TFS(&tlv_status_ebit), 0x80, "Fatal Error Bit", HFILL }},
2327
2328     { &hf_ldp_tlv_status_fbit,
2329       { "F Bit", "ldp.msg.tlv.status.fbit", FT_BOOLEAN, 8, TFS(&tlv_status_fbit), 0x40, "Forward Bit", HFILL }},
2330
2331     { &hf_ldp_tlv_status_data,
2332       { "Status Data", "ldp.msg.tlv.status.data", FT_UINT32, BASE_HEX, VALS(tlv_status_data), 0x3FFFFFFF, "Status Data", HFILL }},
2333
2334     { &hf_ldp_tlv_status_msg_id,
2335       { "Message ID", "ldp.msg.tlv.status.msg.id", FT_UINT32, BASE_HEX, NULL, 0x0, "Identifies peer message to which Status TLV refers", HFILL }},
2336
2337     { &hf_ldp_tlv_status_msg_type,
2338       { "Message Type", "ldp.msg.tlv.status.msg.type", FT_UINT16, BASE_HEX, VALS(ldp_message_types), 0x0, "Type of peer message to which Status TLV refers", HFILL }},
2339
2340     { &hf_ldp_tlv_extstatus_data,
2341       { "Extended Status Data", "ldp.msg.tlv.extstatus.data", FT_UINT32, BASE_HEX, NULL, 0x0, "Extended Status Data", HFILL }},
2342
2343     { &hf_ldp_tlv_returned_version,
2344       { "Returned PDU Version", "ldp.msg.tlv.returned.version", FT_UINT16, BASE_DEC, NULL, 0x0, "LDP Version Number", HFILL }},
2345
2346     { &hf_ldp_tlv_returned_pdu_len,
2347       { "Returned PDU Length", "ldp.msg.tlv.returned.pdu_len", FT_UINT16, BASE_DEC, NULL, 0x0, "LDP PDU Length", HFILL }},
2348
2349     { &hf_ldp_tlv_returned_lsr,
2350       { "Returned PDU LSR ID", "ldp.msg.tlv.returned.ldpid.lsr", FT_IPv4, BASE_DEC, NULL, 0x0, "LDP Label Space Router ID", HFILL }},
2351
2352     { &hf_ldp_tlv_returned_ls_id,
2353       { "Returned PDU Label Space ID", "ldp.msg.tlv.returned.ldpid.lsid", FT_UINT16, BASE_HEX, NULL, 0x0, "LDP Label Space ID", HFILL }},
2354
2355     { &hf_ldp_tlv_returned_msg_ubit,
2356       { "Returned Message Unknown bit", "ldp.msg.tlv.returned.msg.ubit", FT_UINT8, BASE_HEX, TFS(&ldp_message_ubit), 0x80, "Message Unknown bit", HFILL }},
2357
2358     { &hf_ldp_tlv_returned_msg_type,
2359       { "Returned Message Type", "ldp.msg.tlv.returned.msg.type", FT_UINT16, BASE_HEX, VALS(ldp_message_types), 0x7FFF, "LDP message type", HFILL }},
2360
2361     { &hf_ldp_tlv_returned_msg_len,
2362       { "Returned Message Length", "ldp.msg.tlv.returned.msg.len", FT_UINT16, BASE_DEC, NULL, 0x0, "LDP Message Length (excluding message type and len)", HFILL }},
2363
2364     { &hf_ldp_tlv_returned_msg_id,
2365       { "Returned Message ID", "ldp.msg.tlv.returned.msg.id", FT_UINT32, BASE_HEX, NULL, 0x0, "LDP Message ID", HFILL }},
2366
2367     {&hf_ldp_tlv_fec_vc_controlword,
2368      {"C-bit", "ldp.msg.tlv.fec.vc.controlword", FT_BOOLEAN, 8, TFS(&fec_vc_cbit), 0x80, "Control Word Present", HFILL }},
2369
2370     {&hf_ldp_tlv_fec_vc_vctype,
2371      {"VC Type", "ldp.msg.tlv.fec.vc.vctype", FT_UINT16, BASE_HEX, VALS(fec_vc_types_vals), 0x7FFF, "Virtual Circuit Type", HFILL }},
2372
2373     {&hf_ldp_tlv_fec_vc_infolength,
2374      {"VC Info Length", "ldp.msg.tlv.fec.vc.infolength", FT_UINT8, BASE_DEC, NULL, 0x0, "VC FEC Info Length", HFILL }},
2375
2376     {&hf_ldp_tlv_fec_vc_groupid,
2377      {"Group ID", "ldp.msg.tlv.fec.vc.groupid", FT_UINT32, BASE_DEC, NULL, 0x0, "VC FEC Group ID", HFILL }},
2378
2379     {&hf_ldp_tlv_fec_vc_vcid,
2380      {"VC ID", "ldp.msg.tlv.fec.vc.vcid", FT_UINT32, BASE_DEC, NULL, 0x0, "VC FEC VCID", HFILL }},
2381
2382     {&hf_ldp_tlv_fec_vc_intparam_length,
2383      {"Length", "ldp.msg.tlv.fec.vc.intparam.length", FT_UINT8, BASE_DEC, NULL, 0x0, "VC FEC Interface Paramater Length", HFILL }},
2384
2385     {&hf_ldp_tlv_fec_vc_intparam_mtu,
2386      {"MTU", "ldp.msg.tlv.fec.vc.intparam.mtu", FT_UINT16, BASE_DEC, NULL, 0x0, "VC FEC Interface Paramater MTU", HFILL }},
2387
2388     {&hf_ldp_tlv_fec_vc_intparam_id,
2389      {"ID", "ldp.msg.tlv.fec.vc.intparam.id", FT_UINT8, BASE_HEX, VALS(fec_vc_interfaceparm), 0x0, "VC FEC Interface Paramater ID", HFILL }},
2390
2391     {&hf_ldp_tlv_fec_vc_intparam_maxcatmcells,
2392      {"Number of Cells", "ldp.msg.tlv.fec.vc.intparam.maxatm", FT_UINT16, BASE_DEC, NULL, 0x0, "VC FEC Interface Param Max ATM Concat Cells", HFILL }},
2393
2394     { &hf_ldp_tlv_fec_vc_intparam_desc,
2395       { "Description", "ldp.msg.tlv.fec.vc.intparam.desc", FT_STRING, BASE_DEC, NULL, 0, "VC FEC Interface Description", HFILL }},
2396
2397     {&hf_ldp_tlv_fec_vc_intparam_cembytes,
2398      {"Payload Bytes", "ldp.msg.tlv.fec.vc.intparam.cembytes", FT_UINT16, BASE_DEC, NULL, 0x0, "VC FEC Interface Param CEM Payload Bytes", HFILL }},
2399
2400     { &hf_ldp_tlv_lspid_act_flg,
2401       { "Action Indicator Flag", "ldp.msg.tlv.lspid.actflg", FT_UINT16, BASE_HEX, VALS(ldp_act_flg_vals), 0x000F, "Action Indicator Flag", HFILL}},
2402
2403     { &hf_ldp_tlv_lspid_cr_lsp,
2404       { "Local CR-LSP ID", "ldp.msg.tlv.lspid.locallspid", FT_UINT16, BASE_HEX, NULL, 0x0, "Local CR-LSP ID", HFILL}},
2405
2406     { &hf_ldp_tlv_lspid_ldpid,
2407       { "Ingress LSR Router ID", "ldp.msg.tlv.lspid.lsrid", FT_IPv4, BASE_DEC, NULL, 0x0, "Ingress LSR Router ID", HFILL}},
2408
2409     { &hf_ldp_tlv_er_hop_loose,
2410       { "Loose route bit", "ldp.msg.tlv.er_hop.loose", FT_UINT24, BASE_HEX, VALS(ldp_loose_vals), 0x800000, "Loose route bit", HFILL}},
2411
2412     { &hf_ldp_tlv_er_hop_prelen,
2413       { "Prefix length", "ldp.msg.tlv.er_hop.prefixlen", FT_UINT8, BASE_DEC, NULL, 0x0, "Prefix len", HFILL}},
2414
2415     { &hf_ldp_tlv_er_hop_prefix4,
2416       { "IPv4 Address", "ldp.msg.tlv.er_hop.prefix4", FT_IPv4, BASE_DEC, NULL, 0x0, "IPv4 Address", HFILL}},
2417    { &hf_ldp_tlv_er_hop_prefix6,
2418      { "IPv6 Address", "ldp.msg.tlv.er_hop.prefix6", FT_IPv6, BASE_DEC, NULL, 0x0, "IPv6 Address", HFILL}},
2419
2420     { &hf_ldp_tlv_er_hop_as,
2421       { "AS Number", "ldp.msg.tlv.er_hop.as", FT_UINT16, BASE_DEC, NULL, 0x0, "AS Number", HFILL}},
2422
2423     { &hf_ldp_tlv_er_hop_cr_lsp,
2424       { "Local CR-LSP ID", "ldp.msg.tlv.er_hop.locallspid", FT_UINT16, BASE_DEC, NULL, 0x0, "Local CR-LSP ID", HFILL}},
2425
2426     { &hf_ldp_tlv_er_hop_ldpid,
2427       { "Local CR-LSP ID", "ldp.msg.tlv.er_hop.lsrid", FT_IPv4, BASE_DEC, NULL, 0x0, "Local CR-LSP ID", HFILL}},
2428
2429     { &hf_ldp_tlv_flags_reserv,
2430       { "Reserved", "ldp.msg.tlv.flags_reserv", FT_UINT8, BASE_HEX, NULL, 0xC0, "Reserved", HFILL}},
2431
2432     { &hf_ldp_tlv_flags_pdr,
2433       { "PDR", "ldp.msg.tlv.flags_pdr", FT_BOOLEAN, 8, TFS(&tlv_negotiable), 0x1, "PDR negotiability flag", HFILL}},
2434
2435     { &hf_ldp_tlv_flags_pbs,
2436       { "PBS", "ldp.msg.tlv.flags_pbs", FT_BOOLEAN, 8, TFS(&tlv_negotiable), 0x2, "PBS negotiability flag", HFILL}},
2437
2438     { &hf_ldp_tlv_flags_cdr,
2439       { "CDR", "ldp.msg.tlv.flags_cdr", FT_BOOLEAN, 8, TFS(&tlv_negotiable), 0x4, "CDR negotiability flag", HFILL}},
2440
2441     { &hf_ldp_tlv_flags_cbs,
2442       { "CBS", "ldp.msg.tlv.flags_cbs", FT_BOOLEAN, 8, TFS(&tlv_negotiable), 0x8, "CBS negotiability flag", HFILL}},
2443
2444     { &hf_ldp_tlv_flags_ebs,
2445       { "EBS", "ldp.msg.tlv.flags_ebs", FT_BOOLEAN, 8, TFS(&tlv_negotiable), 0x10, "EBS negotiability flag", HFILL}},
2446
2447     { &hf_ldp_tlv_flags_weight,
2448       { "Weight", "ldp.msg.tlv.flags_weight", FT_BOOLEAN, 8, TFS(&tlv_negotiable), 0x20, "Weight negotiability flag", HFILL}},
2449
2450     { &hf_ldp_tlv_frequency,
2451       { "Frequency", "ldp.msg.tlv.frequency", FT_UINT8, BASE_DEC, VALS(freq_values), 0, "Frequency", HFILL}},
2452
2453     { &hf_ldp_tlv_weight,
2454       { "Weight", "ldp.msg.tlv.weight", FT_UINT8, BASE_DEC, NULL, 0, "Weight of the CR-LSP", HFILL}},
2455
2456     { &hf_ldp_tlv_pdr,
2457       { "PDR", "ldp.msg.tlv.pdr", FT_DOUBLE, BASE_NONE, NULL, 0, "Peak Data Rate", HFILL}},
2458
2459     { &hf_ldp_tlv_pbs,
2460       { "PBS", "ldp.msg.tlv.pbs", FT_DOUBLE, BASE_NONE, NULL, 0, "Peak Burst Size", HFILL}},
2461
2462     { &hf_ldp_tlv_cdr,
2463       { "CDR", "ldp.msg.tlv.cdr", FT_DOUBLE, BASE_NONE, NULL, 0, "Committed Data Rate", HFILL}},
2464
2465     { &hf_ldp_tlv_cbs,
2466       { "CBS", "ldp.msg.tlv.cbs", FT_DOUBLE, BASE_NONE, NULL, 0, "Committed Burst Size", HFILL}},
2467
2468     { &hf_ldp_tlv_ebs,
2469       { "EBS", "ldp.msg.tlv.ebs", FT_DOUBLE, BASE_NONE, NULL, 0, "Excess Burst Size", HFILL}},
2470
2471     { &hf_ldp_tlv_set_prio,
2472       { "Set Prio", "ldp.msg.tlv.set_prio", FT_UINT8, BASE_DEC, NULL, 0, "LSP setup priority", HFILL}},
2473
2474     { &hf_ldp_tlv_hold_prio,
2475       { "Hold Prio", "ldp.msg.tlv.hold_prio", FT_UINT8, BASE_DEC, NULL, 0, "LSP hold priority", HFILL}},
2476
2477     { &hf_ldp_tlv_route_pinning,
2478       { "Route Pinning", "ldp.msg.tlv.route_pinning", FT_UINT32, BASE_DEC, VALS(route_pinning_vals), 0x80000000, "Route Pinning", HFILL}},
2479
2480     { &hf_ldp_tlv_resource_class,
2481       { "Resource Class", "ldp.msg.tlv.resource_class", FT_UINT32, BASE_HEX, NULL, 0, "Resource Class (Color)", HFILL}},
2482
2483   };
2484
2485   static gint *ett[] = {
2486     &ett_ldp,
2487     &ett_ldp_header,
2488     &ett_ldp_ldpid,
2489     &ett_ldp_message,
2490     &ett_ldp_tlv,
2491     &ett_ldp_tlv_val,
2492     &ett_ldp_fec,
2493     &ett_ldp_fec_vc_interfaceparam
2494   };
2495   module_t *ldp_module;
2496
2497   proto_ldp = proto_register_protocol("Label Distribution Protocol",
2498                                        "LDP", "ldp");
2499
2500   proto_register_field_array(proto_ldp, hf, array_length(hf));
2501   proto_register_subtree_array(ett, array_length(ett));
2502
2503   /* Register our configuration options for , particularly our port */
2504
2505   ldp_module = prefs_register_protocol(proto_ldp, proto_reg_handoff_ldp);
2506
2507   prefs_register_uint_preference(ldp_module, "tcp.port", "LDP TCP Port",
2508                                  "Set the TCP port for messages (if other"
2509                                  " than the default of 646)",
2510                                  10, &global_ldp_tcp_port);
2511
2512   prefs_register_uint_preference(ldp_module, "udp.port", "LDP UDP Port",
2513                                  "Set the UDP port for messages (if other"
2514                                  " than the default of 646)",
2515                                  10, &global_ldp_udp_port);
2516
2517   prefs_register_bool_preference(ldp_module, "desegment_ldp_messages",
2518     "Desegment all LDP messages spanning multiple TCP segments",
2519     "Whether the LDP dissector should desegment all messages spanning multiple TCP segments",
2520     &ldp_desegment);
2521 }
2522
2523 /* The registration hand-off routine */
2524 void
2525 proto_reg_handoff_ldp(void)
2526 {
2527   static gboolean ldp_prefs_initialized = FALSE;
2528   static dissector_handle_t ldp_tcp_handle, ldp_handle;
2529
2530   if (!ldp_prefs_initialized) {
2531
2532     ldp_tcp_handle = new_create_dissector_handle(dissect_ldp_tcp, proto_ldp);
2533     ldp_handle = new_create_dissector_handle(dissect_ldp, proto_ldp);
2534
2535     ldp_prefs_initialized = TRUE;
2536
2537   }
2538   else {
2539
2540     dissector_delete("tcp.port", tcp_port, ldp_tcp_handle);
2541     dissector_delete("udp.port", udp_port, ldp_handle);
2542
2543   }
2544
2545   /* Set our port number for future use */
2546
2547   tcp_port = global_ldp_tcp_port;
2548   udp_port = global_ldp_udp_port;
2549
2550   dissector_add("tcp.port", global_ldp_tcp_port, ldp_tcp_handle);
2551   dissector_add("udp.port", global_ldp_udp_port, ldp_handle);
2552
2553 }