epan/dissectors/packet-wlccp.c

   1 /* packet-wlccp.c
   2  * Routines for Cisco Wireless LAN Context Control Protocol dissection
   3  *
   4  * Copyright 2005, Joerg Mayer (see AUTHORS file)
   5  * Copyright 2006, Stephen Fisher <stephentfisher@yahoo.com>
   6  *
   7  * $Id$
   8  *
   9  * Wireshark - Network traffic analyzer
  10  * By Gerald Combs <gerald@wireshark.org>
  11  * Copyright 1998 Gerald Combs
  12  *
  13  * The CISCOWL dissector was merged into this one.
  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 /* Version 0x00 was reverse engineered */
  31 /* Version 0xC1 Protocol reference: US Patent Application 0050220054 */
  32
  33 /* More clues to version 0x00 of the protocol:
  34  *
  35  * Header (Eth V2 or SNAP)
  36  * Length (2 bytes)
  37  * Type (2 bytes)
  38  *      0202: Unknown, Length 36 (14 + 20 + 2)
  39  *      4001: Unknown, Length 48 (14 + 32 + 2)
  40  *      4601: Unknown, Length 34 (14 + 18 + 2)
  41  *      4081 on Eth V2: Name, Version Length 84 (14 + 48 + 20 + 2)
  42  *      4081 on 802.3: Name Length 72 (14 + 56 + 2)
  43  * Dst MAC (6 bytes)
  44  * Src MAC (6 bytes)
  45  * Unknown1 (2 bytes)  Unknown19 + Unknown2 may be a MAC address on type 0202
  46  * Unknown2 (4 bytes)   see Unknown19
  47  * 0 (17 bytes)
  48  * Device IP (4 bytes)
  49  * 0 (2 bytes)
  50  * Device name (8 bytes)
  51  * 0 (20 bytes)
  52  * Unknown3 (2 bytes)
  53  * Unknown4 (4 bytes)
  54  * Version string (10 bytes)
  55  * 0 (4 bytes)
  56  * 0 (2 bytes)
  57  */
  58
  59 #ifdef HAVE_CONFIG_H
  60 # include "config.h"
  61 #endif
  62
  63 #include <stdio.h>
  64 #include <stdlib.h>
  65 #include <string.h>
  66
  67 #include <glib.h>
  68
  69 #include <epan/packet.h>
  70 #include <epan/prefs.h>
  71 #include <epan/etypes.h>
  72 #include <epan/oui.h>
  73 #include "packet-llc.h"
  74
  75 static const value_string wlccp_sap_vs[] = {
  76         { 0, "Context Management"        },
  77         { 2, "Radio Resource Management" },
  78         { 0, NULL                        }
  79 };
  80
  81 static const value_string wlccp_subtype_vs[] = {
  82         { 0, "Request" },
  83         { 1, "Reply"   },
  84         { 2, "Confirm" },
  85         { 3, "Ack"     },
  86         { 0, NULL      }
  87 };
  88
  89 static const value_string wlccp_node_type_vs[] = {
  90         { 0, "None"                         },
  91         { 1, "Access Point (AP)"            },
  92         { 2, "Subnet Context Manager (SCM)" },
  93         { 4, "Local Context Manager (LCM)"  },
  94         { 8, "Campus Context Manager (CCM)" },
  95         { 0x10, "Infrastructure (ICN)"      },
  96         { 0x40, "Client"                    }
  97 };
  98
  99 static const value_string cisco_pid_vals[] = {
 100         { 0x0000, "WLCCP" },
 101         { 0, NULL         }
 102 };
 103
 104 /* Bit fields in message type */
 105 #define MT_SUBTYPE         (0xC0)
 106 #define MT_BASE_MSG_TYPE   (0x3F)
 107
 108 /* Bit fields in flags */
 109 #define F_RETRY            (1<<15)
 110 #define F_RESPONSE_REQUEST (1<<14)
 111 #define F_TLV              (1<<13)
 112 #define F_INBOUND          (1<<12)
 113 #define F_OUTBOUND         (1<<11)
 114 #define F_HOPWISE_ROUTING  (1<<10)
 115 #define F_ROOT_CM          (1<<9)
 116 #define F_RELAY            (1<<8)
 117 #define F_MIC              (1<<7)
 118
 119 #define WLCCP_UDP_PORT 2887
 120 /* WLCCP also uses an LCC OUI type and an ethertype */
 121
 122 /* Forward declaration we need below */
 123 void proto_reg_handoff_wlccp(void);
 124
 125 /* Initialize the protocol and registered fields */
 126 static int proto_wlccp = -1;
 127
 128 static int hf_llc_wlccp_pid = -1;
 129
 130 static int hf_wlccp_version = -1;
 131
 132 static int hf_wlccp_dstmac = -1;
 133 static int hf_wlccp_srcmac = -1;
 134 static int hf_wlccp_hostname = -1;
 135
 136 static int hf_wlccp_sap = -1;
 137 static int hf_wlccp_destination_node_type = -1;
 138 static int hf_wlccp_length = -1;
 139 static int hf_wlccp_type = -1;
 140 static int hf_wlccp_subtype = -1;
 141 static int hf_wlccp_base_message_type = -1;
 142 static int hf_wlccp_hops = -1;
 143 static int hf_wlccp_msg_id = -1;
 144 static int hf_wlccp_flags = -1;
 145 static int hf_wlccp_retry_flag = -1;
 146 static int hf_wlccp_response_request_flag = -1;
 147 static int hf_wlccp_tlv_flag = -1;
 148 static int hf_wlccp_inbound_flag = -1;
 149 static int hf_wlccp_outbound_flag = -1;
 150 static int hf_wlccp_hopwise_routing_flag = -1;
 151 static int hf_wlccp_root_cm_flag = -1;
 152 static int hf_wlccp_relay_flag = -1;
 153 static int hf_wlccp_mic_flag = -1;
 154 static int hf_wlccp_originator_node_type = -1;
 155 static int hf_wlccp_originator = -1;
 156 static int hf_wlccp_responder_node_type = -1;
 157 static int hf_wlccp_responder = -1;
 158 static int hf_wlccp_relay_node_type = -1;
 159 static int hf_wlccp_relay_node_id = -1;
 160 static int hf_wlccp_priority = -1;
 161 static int hf_wlccp_age = -1;
 162 static int hf_wlccp_period = -1;
 163 static int hf_wlccp_ipv4_address = -1;
 164
 165
 166 /* Initialize the subtree pointers */
 167 static gint ett_wlccp = -1;
 168 static gint ett_wlccp_type = -1;
 169 static gint ett_wlccp_flags = -1;
 170
 171 /* Code to actually dissect the packets */
 172 static void
 173 dissect_wlccp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 174 {
 175         /* Set up structures needed to add the protocol subtree and manage it */
 176         proto_item *ti;
 177         proto_tree *wlccp_tree, *wlccp_type_tree, *wlccp_flags_tree;
 178         gboolean relay_flag;
 179         guint16 type, flags;
 180         guint offset = 0, version;
 181
 182         /* Make entries in Protocol column and Info column on summary display */
 183         if (check_col(pinfo->cinfo, COL_PROTOCOL))
 184                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "WLCCP");
 185
 186         if (check_col(pinfo->cinfo, COL_INFO)) {
 187                 if(tvb_get_guint8(tvb, 0) == 0xC1) { /* Get the version number */
 188                         col_add_fstr(pinfo->cinfo, COL_INFO, "Message subtype: %s",
 189                                      match_strval((tvb_get_guint8(tvb, 6)>>6) & 3,
 190                                                   wlccp_subtype_vs));
 191                 } else {
 192                         col_add_str(pinfo->cinfo, COL_INFO, "WLCCP frame");
 193                 }
 194         }
 195
 196         if (tree) {
 197                 /* create display subtree for the protocol */
 198                 ti = proto_tree_add_item(tree, proto_wlccp, tvb, 0, -1, FALSE);
 199                 wlccp_tree = proto_item_add_subtree(ti, ett_wlccp);
 200
 201                 proto_tree_add_item(wlccp_tree, hf_wlccp_version,
 202                                     tvb, offset, 1, FALSE);
 203                 version = tvb_get_guint8(tvb, 0);
 204                 offset += 1;
 205
 206                 if(version == 0x0) {
 207                         proto_tree_add_item(wlccp_tree, hf_wlccp_length,
 208                                             tvb, 1, 1, FALSE);
 209
 210                         proto_tree_add_item(wlccp_tree, hf_wlccp_type,
 211                                             tvb, 2, 2, FALSE);
 212                         type = tvb_get_ntohs(tvb, 2);
 213
 214                         proto_tree_add_item(wlccp_tree, hf_wlccp_dstmac,
 215                                             tvb, 4, 6, FALSE);
 216
 217                         proto_tree_add_item(wlccp_tree, hf_wlccp_srcmac,
 218                                             tvb, 10, 6, FALSE);
 219
 220                         if(type == 0x4081) {
 221                                 proto_tree_add_item(wlccp_tree, hf_wlccp_ipv4_address,
 222                                                     tvb, 38, 4, FALSE);
 223
 224                                 proto_tree_add_item(wlccp_tree, hf_wlccp_hostname,
 225                                                     tvb, 44, 28, FALSE);
 226                         }
 227                 }
 228
 229                 if(version == 0xC1) {
 230                         proto_tree_add_item(wlccp_tree, hf_wlccp_sap,
 231                                             tvb, offset, 1, FALSE);
 232                         offset += 1;
 233
 234                         proto_tree_add_item(wlccp_tree, hf_wlccp_destination_node_type,
 235                                             tvb, offset, 2, FALSE);
 236                         offset += 2;
 237
 238                         proto_tree_add_item(wlccp_tree, hf_wlccp_length,
 239                                             tvb, offset, 2, FALSE);
 240                         offset += 2;
 241
 242                         ti = proto_tree_add_item(wlccp_tree, hf_wlccp_type,
 243                                                  tvb, offset, 1, FALSE);
 244                         wlccp_type_tree = proto_item_add_subtree(ti, ett_wlccp_type);
 245
 246                         proto_tree_add_item(wlccp_type_tree, hf_wlccp_subtype,
 247                                             tvb, offset, 1, FALSE);
 248                         proto_tree_add_item(wlccp_type_tree, hf_wlccp_base_message_type,
 249                                             tvb, offset, 1, FALSE);
 250                         offset += 1;
 251
 252                         proto_tree_add_item(wlccp_tree, hf_wlccp_hops,
 253                                             tvb, offset, 1, FALSE);
 254                         offset += 1;
 255
 256                         proto_tree_add_item(wlccp_tree, hf_wlccp_msg_id,
 257                                             tvb, offset, 2, FALSE);
 258                         offset += 2;
 259
 260                         ti = proto_tree_add_item(wlccp_tree, hf_wlccp_flags,
 261                                                  tvb, offset, 2, FALSE);
 262                         flags = tvb_get_ntohs(tvb, offset);
 263                         wlccp_flags_tree = proto_item_add_subtree(ti, ett_wlccp_flags);
 264
 265                         proto_tree_add_item(wlccp_flags_tree, hf_wlccp_retry_flag,
 266                                             tvb, offset, 2, FALSE);
 267
 268                         proto_tree_add_item(wlccp_flags_tree,
 269                                             hf_wlccp_response_request_flag,
 270                                             tvb, offset, 2, FALSE);
 271
 272                         proto_tree_add_item(wlccp_flags_tree,
 273                                             hf_wlccp_tlv_flag,
 274                                             tvb, offset, 2, FALSE);
 275
 276                         proto_tree_add_item(wlccp_flags_tree,
 277                                             hf_wlccp_inbound_flag,
 278                                             tvb, offset, 2, FALSE);
 279
 280                         proto_tree_add_item(wlccp_flags_tree,
 281                                             hf_wlccp_outbound_flag,
 282                                             tvb, offset, 2, FALSE);
 283
 284                         proto_tree_add_item(wlccp_flags_tree,
 285                                             hf_wlccp_hopwise_routing_flag,
 286                                             tvb, offset, 2, FALSE);
 287
 288                         proto_tree_add_item(wlccp_flags_tree,
 289                                             hf_wlccp_root_cm_flag,
 290                                             tvb, offset, 2, FALSE);
 291
 292                         proto_tree_add_item(wlccp_flags_tree,
 293                                             hf_wlccp_relay_flag,
 294                                             tvb, offset, 2, FALSE);
 295                         relay_flag = (tvb_get_ntohs(tvb, offset)>>8) & 1;
 296
 297                         proto_tree_add_item(wlccp_flags_tree,
 298                                             hf_wlccp_mic_flag,
 299                                             tvb, offset, 2, FALSE);
 300                         offset += 2;
 301
 302                         proto_tree_add_item(wlccp_tree, hf_wlccp_originator_node_type,
 303                                             tvb, offset, 2, FALSE);
 304                         offset += 2;
 305
 306                         proto_tree_add_item(wlccp_tree, hf_wlccp_originator,
 307                                             tvb, offset, 6, FALSE);
 308                         offset += 6;
 309
 310                         proto_tree_add_item(wlccp_tree, hf_wlccp_responder_node_type,
 311                                             tvb, offset, 2, FALSE);
 312                         offset += 2;
 313
 314                         proto_tree_add_item(wlccp_tree, hf_wlccp_responder,
 315                                             tvb, offset, 6, FALSE);
 316                         offset += 6;
 317
 318                         offset += 6; /* Skip over MAC address of sender again */
 319
 320                         if(relay_flag) {
 321                                 proto_tree_add_item(wlccp_tree, hf_wlccp_relay_node_type,
 322                                                     tvb, offset, 2, FALSE);
 323                                 offset += 2;
 324
 325                                 proto_tree_add_item(wlccp_tree, hf_wlccp_relay_node_id,
 326                                                     tvb, offset, 6, FALSE);
 327                                 offset += 6;
 328                         }
 329
 330                         if(flags == 0x2800) { /* We have extra information at the end of the frame */
 331                                 proto_tree_add_item(wlccp_tree, hf_wlccp_priority,
 332                                                     tvb, 38, 1, FALSE);
 333
 334                                 proto_tree_add_item(wlccp_tree, hf_wlccp_age,
 335                                                     tvb, 48, 4, FALSE);
 336
 337                                 proto_tree_add_item(wlccp_tree, hf_wlccp_period,
 338                                                     tvb, 55, 1, FALSE);
 339
 340                                 proto_tree_add_item(wlccp_tree, hf_wlccp_ipv4_address,
 341                                                     tvb, 76, 4, FALSE);
 342
 343                         }
 344                 }
 345         }
 346 }
 347
 348
 349 /* Register the protocol with Wireshark */
 350 void
 351 proto_register_wlccp(void)
 352 {
 353         /* Setup list of header fields  See Section 1.6.1 for details*/
 354         static hf_register_info hf[] = {
 355                 { &hf_wlccp_version,
 356                   { "Version", "wlccp.version",
 357                     FT_UINT8, BASE_HEX, NULL,
 358                     0x0, "Protocol ID/Version", HFILL }
 359                 },
 360
 361                 { &hf_wlccp_srcmac,
 362                   { "Src MAC", "wlccp.srcmac",
 363                     FT_ETHER, BASE_NONE, NULL,
 364                     0x0, "Source MAC address", HFILL }
 365                 },
 366
 367                 { &hf_wlccp_dstmac,
 368                   { "Dst MAC", "wlccp.dstmac",
 369                     FT_ETHER, BASE_NONE, NULL,
 370                     0x0, "Destination MAC address", HFILL }
 371                 },
 372
 373                 { &hf_wlccp_hostname,
 374                   { "Hostname", "wlccp.hostname",
 375                     FT_STRING, BASE_NONE, NULL,
 376                     0x0, "Hostname of device", HFILL }
 377                 },
 378
 379                 { &hf_wlccp_sap,
 380                   { "SAP", "wlccp.sap",
 381                     FT_UINT8, BASE_DEC, VALS(wlccp_sap_vs),
 382                     0x0, "Service Access Point ID", HFILL }
 383                 },
 384
 385                 { &hf_wlccp_destination_node_type,
 386                   { "Destination node type", "wlccp.destination_node_type",
 387                     FT_UINT8, BASE_DEC, VALS(wlccp_node_type_vs),
 388                     0x0, "Node type of the hop destination", HFILL }
 389                 },
 390
 391                 { &hf_wlccp_length,
 392                   { "Length", "wlccp.length",
 393                     FT_UINT16, BASE_DEC, NULL,
 394                     0x0, "Length of WLCCP payload (bytes)", HFILL }
 395                 },
 396
 397
 398                 { &hf_wlccp_type,
 399                   { "Message Type", "wlccp.type",
 400                     FT_UINT8, BASE_HEX, NULL,
 401                     0x0, "Message Type", HFILL }
 402                 },
 403
 404                 { &hf_wlccp_subtype,
 405                   { "Subtype", "wlccp.subtype",
 406                     FT_UINT8, BASE_DEC, VALS(wlccp_subtype_vs),
 407                     MT_SUBTYPE, "Message Subtype", HFILL }
 408                 },
 409
 410                 { &hf_wlccp_base_message_type,
 411                   { "Base message type", "wlccp.base_message_type",
 412                     FT_UINT8, BASE_HEX_DEC, NULL,
 413                     MT_BASE_MSG_TYPE, "Base message type", HFILL }
 414                 },
 415
 416
 417                 { &hf_wlccp_hops,
 418                   { "Hops", "wlccp.hops",
 419                     FT_UINT8, BASE_DEC, NULL,
 420                     0x0, "Number of WLCCP hops", HFILL }
 421                 },
 422
 423                 { &hf_wlccp_msg_id,
 424                   { "Message ID", "wlccp.msg_id",
 425                     FT_UINT16, BASE_DEC, NULL,
 426                     0x0, "Sequence number used to match request/reply pairs",
 427                     HFILL }
 428                 },
 429
 430
 431                 { &hf_wlccp_flags,
 432                   { "Flags", "wlccp.flags",
 433                     FT_UINT16, BASE_HEX, NULL,
 434                     0x0, "Flags", HFILL }
 435                 },
 436
 437                 { &hf_wlccp_retry_flag,
 438                   { "Retry flag", "wlccp.retry_flag",
 439                     FT_UINT16, BASE_DEC, NULL,
 440                     F_RETRY, "Set on for retransmissions", HFILL }
 441                 },
 442
 443                 { &hf_wlccp_response_request_flag,
 444                   { "Response request flag", "wlccp.response_request_flag",
 445                     FT_UINT16, BASE_DEC, NULL,
 446                     F_RESPONSE_REQUEST, "Set on to request a reply", HFILL }
 447                 },
 448
 449                 { &hf_wlccp_tlv_flag,
 450                   { "TLV flag", "wlccp.tlv_flag",
 451                     FT_UINT16, BASE_DEC, NULL,
 452                     F_TLV, "Set to indicate that optional TLVs follow the fixed fields", HFILL }
 453                 },
 454
 455                 { &hf_wlccp_inbound_flag,
 456                   { "Inbound flag", "wlccp.inbound_flag",
 457                     FT_UINT16, BASE_DEC, NULL,
 458                     F_INBOUND, "Message is inbound to the top of the topology tree", HFILL }
 459                 },
 460
 461                 { &hf_wlccp_outbound_flag,
 462                   { "Outbound flag", "wlccp.outbound_flag",
 463                     FT_UINT16, BASE_DEC, NULL,
 464                     F_OUTBOUND, "Message is outbound from the top of the topology tree", HFILL }
 465                 },
 466
 467                 { &hf_wlccp_hopwise_routing_flag,
 468                   { "Hopwise-routing flag", "wlccp.hopwise_routing_flag",
 469                     FT_UINT16, BASE_DEC, NULL,
 470                     F_HOPWISE_ROUTING, "On to force intermediate access points to process the message also", HFILL }
 471                 },
 472
 473                 { &hf_wlccp_root_cm_flag,
 474                   { "Root context manager flag", "wlccp.root_cm_flag",
 475                     FT_UINT16, BASE_DEC, NULL,
 476                     F_ROOT_CM, "Set to on to send message to the root context manager of the topology tree", HFILL }
 477                 },
 478
 479                 { &hf_wlccp_relay_flag,
 480                   { "Relay flag", "wlccp.relay_flag",
 481                     FT_UINT16, BASE_DEC, NULL,
 482                     F_RELAY, "Signifies that this header is immediately followed by a relay node field", HFILL }
 483                 },
 484
 485                 { &hf_wlccp_mic_flag,
 486                   { "MIC flag", "wlccp.mic_flag",
 487                     FT_UINT16, BASE_DEC, NULL,
 488                     F_MIC, "On in a message that must be authenticated and has an authentication TLV", HFILL }
 489                 },
 490
 491                 { &hf_wlccp_originator_node_type,
 492                   { "Originator node type", "wlccp.originator_node_type",
 493                     FT_UINT8, BASE_DEC, VALS(wlccp_node_type_vs),
 494                     0x0, "Originating device's node type", HFILL }
 495                 },
 496
 497                 { &hf_wlccp_originator,
 498                   { "Originator", "wlccp.originator",
 499                     FT_ETHER, BASE_NONE, NULL,
 500                     0x0, "Originating device's MAC address", HFILL }
 501                 },
 502
 503                 { &hf_wlccp_responder_node_type,
 504                   { "Responder node type", "wlccp.responder_node_type",
 505                     FT_UINT8, BASE_DEC, VALS(wlccp_node_type_vs),
 506                     0x0, "Responding device's node type", HFILL }
 507                 },
 508
 509                 { &hf_wlccp_responder,
 510                   { "Responder", "wlccp.responder",
 511                     FT_ETHER, BASE_NONE, NULL,
 512                     0x0, "Responding device's MAC address", HFILL }
 513                 },
 514
 515                 { &hf_wlccp_relay_node_type,
 516                   { "Relay node type", "wlccp.relay_node_type",
 517                     FT_UINT8, BASE_DEC, VALS(wlccp_node_type_vs),
 518                     0x0, "Type of node which relayed this message", HFILL }
 519                 },
 520
 521                 { &hf_wlccp_relay_node_id,
 522                   { "Relay node ID", "wlccp.relay_node_id",
 523                     FT_ETHER, BASE_NONE, NULL,
 524                     0x0, "Node which relayed this message", HFILL }
 525                 },
 526
 527                 { &hf_wlccp_priority,
 528                   { "WDS priority", "wlccp.priority",
 529                     FT_UINT8, BASE_DEC, NULL, 0,
 530                     "WDS priority of this access point", HFILL }
 531                 },
 532
 533                 { &hf_wlccp_age,
 534                   { "Age", "wlccp.age",
 535                     FT_UINT32, BASE_DEC, NULL, 0,
 536                     "Time since AP became a WDS master", HFILL }
 537                 },
 538
 539                 { &hf_wlccp_period,
 540                   { "Period", "wlccp.period",
 541                     FT_UINT8, BASE_DEC, NULL, 0,
 542                     "Interval between announcements (seconds)", HFILL }
 543                 },
 544
 545                 { &hf_wlccp_ipv4_address,
 546                   { "IPv4 Address", "wlccp.ipv4_address",
 547                     FT_IPv4, BASE_NONE, NULL, 0,
 548                     "IPv4 address of this access point", HFILL }
 549                 }
 550
 551         };
 552
 553         /* Setup protocol subtree array */
 554         static gint *ett[] = {
 555                 &ett_wlccp,
 556                 &ett_wlccp_type,
 557                 &ett_wlccp_flags
 558         };
 559
 560         /* Register the protocol name and description */
 561         proto_wlccp = proto_register_protocol("Cisco Wireless LAN Context Control Protocol", "WLCCP", "wlccp");
 562
 563         /* Required function calls to register the header fields and subtrees used */
 564         proto_register_field_array(proto_wlccp, hf, array_length(hf));
 565         proto_register_subtree_array(ett, array_length(ett));
 566
 567
 568 }
 569
 570
 571 void
 572 proto_reg_handoff_wlccp(void)
 573 {
 574         static gboolean inited = FALSE;
 575
 576         if( !inited ) {
 577
 578                 dissector_handle_t wlccp_handle;
 579
 580                 wlccp_handle = create_dissector_handle(dissect_wlccp,
 581                                                        proto_wlccp);
 582
 583                 dissector_add("ethertype", ETHERTYPE_WLCCP, wlccp_handle);
 584                 dissector_add("udp.port", WLCCP_UDP_PORT, wlccp_handle);
 585                 dissector_add("llc.wlccp_pid", 0x0000, wlccp_handle);
 586
 587                 inited = TRUE;
 588         }
 589 }
 590
 591
 592 void
 593 proto_register_wlccp_oui(void)
 594 {
 595         static hf_register_info hf[] = {
 596                 { &hf_llc_wlccp_pid,
 597                   { "PID", "llc.wlccp_pid",
 598                     FT_UINT16, BASE_HEX, VALS(cisco_pid_vals),
 599                     0x0, "", HFILL }
 600                 }
 601         };
 602
 603         llc_add_oui(OUI_CISCOWL, "llc.wlccp_pid", "Cisco WLCCP OUI PID", &hf);
 604 }