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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 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         { 0, NULL                           }
  98 };
  99
 100 static const value_string cisco_pid_vals[] = {
 101         { 0x0000, "WLCCP" },
 102         { 0, NULL         }
 103 };
 104
 105 /* Bit fields in message type */
 106 #define MT_SUBTYPE         (0xC0)
 107 #define MT_BASE_MSG_TYPE   (0x3F)
 108
 109 /* Bit fields in flags */
 110 #define F_RETRY            (1<<15)
 111 #define F_RESPONSE_REQUEST (1<<14)
 112 #define F_TLV              (1<<13)
 113 #define F_INBOUND          (1<<12)
 114 #define F_OUTBOUND         (1<<11)
 115 #define F_HOPWISE_ROUTING  (1<<10)
 116 #define F_ROOT_CM          (1<<9)
 117 #define F_RELAY            (1<<8)
 118 #define F_MIC              (1<<7)
 119
 120 #define WLCCP_UDP_PORT 2887
 121 /* WLCCP also uses an LLC OUI type and an ethertype */
 122
 123 /* Forward declaration we need below */
 124 void proto_reg_handoff_wlccp(void);
 125
 126 /* Initialize the protocol and registered fields */
 127 static int proto_wlccp = -1;
 128
 129 static int hf_llc_wlccp_pid = -1;
 130
 131 static int hf_wlccp_version = -1;
 132
 133 static int hf_wlccp_dstmac = -1;
 134 static int hf_wlccp_srcmac = -1;
 135 static int hf_wlccp_hostname = -1;
 136
 137 static int hf_wlccp_sap = -1;
 138 static int hf_wlccp_destination_node_type = -1;
 139 static int hf_wlccp_length = -1;
 140 static int hf_wlccp_type = -1;
 141 static int hf_wlccp_subtype = -1;
 142 static int hf_wlccp_base_message_type = -1;
 143 static int hf_wlccp_hops = -1;
 144 static int hf_wlccp_msg_id = -1;
 145 static int hf_wlccp_flags = -1;
 146 static int hf_wlccp_retry_flag = -1;
 147 static int hf_wlccp_response_request_flag = -1;
 148 static int hf_wlccp_tlv_flag = -1;
 149 static int hf_wlccp_inbound_flag = -1;
 150 static int hf_wlccp_outbound_flag = -1;
 151 static int hf_wlccp_hopwise_routing_flag = -1;
 152 static int hf_wlccp_root_cm_flag = -1;
 153 static int hf_wlccp_relay_flag = -1;
 154 static int hf_wlccp_mic_flag = -1;
 155 static int hf_wlccp_originator_node_type = -1;
 156 static int hf_wlccp_originator = -1;
 157 static int hf_wlccp_responder_node_type = -1;
 158 static int hf_wlccp_responder = -1;
 159 static int hf_wlccp_relay_node_type = -1;
 160 static int hf_wlccp_relay_node_id = -1;
 161 static int hf_wlccp_priority = -1;
 162 static int hf_wlccp_age = -1;
 163 static int hf_wlccp_period = -1;
 164 static int hf_wlccp_ipv4_address = -1;
 165
 166
 167 /* Initialize the subtree pointers */
 168 static gint ett_wlccp = -1;
 169 static gint ett_wlccp_type = -1;
 170 static gint ett_wlccp_flags = -1;
 171
 172 /* Code to actually dissect the packets */
 173 static void
 174 dissect_wlccp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 175 {
 176         /* Set up structures needed to add the protocol subtree and manage it */
 177         proto_item *ti;
 178         proto_tree *wlccp_tree, *wlccp_type_tree, *wlccp_flags_tree;
 179         gboolean relay_flag;
 180         guint8 version;
 181         guint16 type, flags;
 182         guint offset = 0;
 183
 184         /* Make entries in Protocol column and Info column on summary display */
 185         if (check_col(pinfo->cinfo, COL_PROTOCOL))
 186                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "WLCCP");
 187
 188         if (check_col(pinfo->cinfo, COL_INFO)) {
 189                 if(tvb_get_guint8(tvb, 0) == 0xC1) { /* Get the version number */
 190                         col_add_fstr(pinfo->cinfo, COL_INFO, "Message subtype: %s",
 191                                      match_strval((tvb_get_guint8(tvb, 6)>>6) & 3,
 192                                                   wlccp_subtype_vs));
 193                 } else {
 194                         col_add_str(pinfo->cinfo, COL_INFO, "WLCCP frame");
 195                 }
 196         }
 197
 198         if (tree) {
 199                 /* create display subtree for the protocol */
 200                 ti = proto_tree_add_item(tree, proto_wlccp, tvb, 0, -1, FALSE);
 201                 wlccp_tree = proto_item_add_subtree(ti, ett_wlccp);
 202
 203                 proto_tree_add_item(wlccp_tree, hf_wlccp_version,
 204                                     tvb, offset, 1, FALSE);
 205                 version = tvb_get_guint8(tvb, 0);
 206                 offset += 1;
 207
 208                 if(version == 0x0) {
 209                         proto_tree_add_item(wlccp_tree, hf_wlccp_length,
 210                                             tvb, 1, 1, FALSE);
 211
 212                         proto_tree_add_item(wlccp_tree, hf_wlccp_type,
 213                                             tvb, 2, 2, FALSE);
 214                         type = tvb_get_ntohs(tvb, 2);
 215
 216                         proto_tree_add_item(wlccp_tree, hf_wlccp_dstmac,
 217                                             tvb, 4, 6, FALSE);
 218
 219                         proto_tree_add_item(wlccp_tree, hf_wlccp_srcmac,
 220                                             tvb, 10, 6, FALSE);
 221
 222                         if(type == 0x4081) {
 223                                 proto_tree_add_item(wlccp_tree, hf_wlccp_ipv4_address,
 224                                                     tvb, 38, 4, FALSE);
 225
 226                                 proto_tree_add_item(wlccp_tree, hf_wlccp_hostname,
 227                                                     tvb, 44, 28, FALSE);
 228                         }
 229                 }
 230
 231                 if(version == 0xC1) {
 232                         proto_tree_add_item(wlccp_tree, hf_wlccp_sap,
 233                                             tvb, offset, 1, FALSE);
 234                         offset += 1;
 235
 236                         proto_tree_add_item(wlccp_tree, hf_wlccp_destination_node_type,
 237                                             tvb, offset, 2, FALSE);
 238                         offset += 2;
 239
 240                         proto_tree_add_item(wlccp_tree, hf_wlccp_length,
 241                                             tvb, offset, 2, FALSE);
 242                         offset += 2;
 243
 244                         ti = proto_tree_add_item(wlccp_tree, hf_wlccp_type,
 245                                                  tvb, offset, 1, FALSE);
 246                         wlccp_type_tree = proto_item_add_subtree(ti, ett_wlccp_type);
 247
 248                         proto_tree_add_item(wlccp_type_tree, hf_wlccp_subtype,
 249                                             tvb, offset, 1, FALSE);
 250                         proto_tree_add_item(wlccp_type_tree, hf_wlccp_base_message_type,
 251                                             tvb, offset, 1, FALSE);
 252                         offset += 1;
 253
 254                         proto_tree_add_item(wlccp_tree, hf_wlccp_hops,
 255                                             tvb, offset, 1, FALSE);
 256                         offset += 1;
 257
 258                         proto_tree_add_item(wlccp_tree, hf_wlccp_msg_id,
 259                                             tvb, offset, 2, FALSE);
 260                         offset += 2;
 261
 262                         ti = proto_tree_add_item(wlccp_tree, hf_wlccp_flags,
 263                                                  tvb, offset, 2, FALSE);
 264                         flags = tvb_get_ntohs(tvb, offset);
 265                         wlccp_flags_tree = proto_item_add_subtree(ti, ett_wlccp_flags);
 266
 267                         proto_tree_add_item(wlccp_flags_tree, hf_wlccp_retry_flag,
 268                                             tvb, offset, 2, FALSE);
 269
 270                         proto_tree_add_item(wlccp_flags_tree,
 271                                             hf_wlccp_response_request_flag,
 272                                             tvb, offset, 2, FALSE);
 273
 274                         proto_tree_add_item(wlccp_flags_tree,
 275                                             hf_wlccp_tlv_flag,
 276                                             tvb, offset, 2, FALSE);
 277
 278                         proto_tree_add_item(wlccp_flags_tree,
 279                                             hf_wlccp_inbound_flag,
 280                                             tvb, offset, 2, FALSE);
 281
 282                         proto_tree_add_item(wlccp_flags_tree,
 283                                             hf_wlccp_outbound_flag,
 284                                             tvb, offset, 2, FALSE);
 285
 286                         proto_tree_add_item(wlccp_flags_tree,
 287                                             hf_wlccp_hopwise_routing_flag,
 288                                             tvb, offset, 2, FALSE);
 289
 290                         proto_tree_add_item(wlccp_flags_tree,
 291                                             hf_wlccp_root_cm_flag,
 292                                             tvb, offset, 2, FALSE);
 293
 294                         proto_tree_add_item(wlccp_flags_tree,
 295                                             hf_wlccp_relay_flag,
 296                                             tvb, offset, 2, FALSE);
 297                         relay_flag = (tvb_get_ntohs(tvb, offset)>>8) & 1;
 298
 299                         proto_tree_add_item(wlccp_flags_tree,
 300                                             hf_wlccp_mic_flag,
 301                                             tvb, offset, 2, FALSE);
 302                         offset += 2;
 303
 304                         proto_tree_add_item(wlccp_tree, hf_wlccp_originator_node_type,
 305                                             tvb, offset, 2, FALSE);
 306                         offset += 2;
 307
 308                         proto_tree_add_item(wlccp_tree, hf_wlccp_originator,
 309                                             tvb, offset, 6, FALSE);
 310                         offset += 6;
 311
 312                         proto_tree_add_item(wlccp_tree, hf_wlccp_responder_node_type,
 313                                             tvb, offset, 2, FALSE);
 314                         offset += 2;
 315
 316                         proto_tree_add_item(wlccp_tree, hf_wlccp_responder,
 317                                             tvb, offset, 6, FALSE);
 318                         offset += 6;
 319
 320                         offset += 6; /* Skip over MAC address of sender again */
 321
 322                         if(relay_flag) {
 323                                 proto_tree_add_item(wlccp_tree, hf_wlccp_relay_node_type,
 324                                                     tvb, offset, 2, FALSE);
 325                                 offset += 2;
 326
 327                                 proto_tree_add_item(wlccp_tree, hf_wlccp_relay_node_id,
 328                                                     tvb, offset, 6, FALSE);
 329                                 offset += 6;
 330                         }
 331
 332                         if(flags == 0x2800) { /* We have extra information at the end of the frame */
 333                                 proto_tree_add_item(wlccp_tree, hf_wlccp_priority,
 334                                                     tvb, 38, 1, FALSE);
 335
 336                                 proto_tree_add_item(wlccp_tree, hf_wlccp_age,
 337                                                     tvb, 48, 4, FALSE);
 338
 339                                 proto_tree_add_item(wlccp_tree, hf_wlccp_period,
 340                                                     tvb, 55, 1, FALSE);
 341
 342                                 proto_tree_add_item(wlccp_tree, hf_wlccp_ipv4_address,
 343                                                     tvb, 76, 4, FALSE);
 344
 345                         }
 346                 }
 347         }
 348 }
 349
 350
 351 /* Register the protocol with Wireshark */
 352 void
 353 proto_register_wlccp(void)
 354 {
 355         /* Setup list of header fields  See Section 1.6.1 for details*/
 356         static hf_register_info hf[] = {
 357                 { &hf_wlccp_version,
 358                   { "Version", "wlccp.version",
 359                     FT_UINT8, BASE_HEX, NULL,
 360                     0x0, "Protocol ID/Version", HFILL }
 361                 },
 362
 363                 { &hf_wlccp_srcmac,
 364                   { "Src MAC", "wlccp.srcmac",
 365                     FT_ETHER, BASE_NONE, NULL,
 366                     0x0, "Source MAC address", HFILL }
 367                 },
 368
 369                 { &hf_wlccp_dstmac,
 370                   { "Dst MAC", "wlccp.dstmac",
 371                     FT_ETHER, BASE_NONE, NULL,
 372                     0x0, "Destination MAC address", HFILL }
 373                 },
 374
 375                 { &hf_wlccp_hostname,
 376                   { "Hostname", "wlccp.hostname",
 377                     FT_STRING, BASE_NONE, NULL,
 378                     0x0, "Hostname of device", HFILL }
 379                 },
 380
 381                 { &hf_wlccp_sap,
 382                   { "SAP", "wlccp.sap",
 383                     FT_UINT8, BASE_DEC, VALS(wlccp_sap_vs),
 384                     0x0, "Service Access Point ID", HFILL }
 385                 },
 386
 387                 { &hf_wlccp_destination_node_type,
 388                   { "Destination node type", "wlccp.destination_node_type",
 389                     FT_UINT8, BASE_DEC, VALS(wlccp_node_type_vs),
 390                     0x0, "Node type of the hop destination", HFILL }
 391                 },
 392
 393                 { &hf_wlccp_length,
 394                   { "Length", "wlccp.length",
 395                     FT_UINT16, BASE_DEC, NULL,
 396                     0x0, "Length of WLCCP payload (bytes)", HFILL }
 397                 },
 398
 399
 400                 { &hf_wlccp_type,
 401                   { "Message Type", "wlccp.type",
 402                     FT_UINT8, BASE_HEX, NULL,
 403                     0x0, "Message Type", HFILL }
 404                 },
 405
 406                 { &hf_wlccp_subtype,
 407                   { "Subtype", "wlccp.subtype",
 408                     FT_UINT8, BASE_DEC, VALS(wlccp_subtype_vs),
 409                     MT_SUBTYPE, "Message Subtype", HFILL }
 410                 },
 411
 412                 { &hf_wlccp_base_message_type,
 413                   { "Base message type", "wlccp.base_message_type",
 414                     FT_UINT8, BASE_HEX_DEC, NULL,
 415                     MT_BASE_MSG_TYPE, "Base message type", HFILL }
 416                 },
 417
 418
 419                 { &hf_wlccp_hops,
 420                   { "Hops", "wlccp.hops",
 421                     FT_UINT8, BASE_DEC, NULL,
 422                     0x0, "Number of WLCCP hops", HFILL }
 423                 },
 424
 425                 { &hf_wlccp_msg_id,
 426                   { "Message ID", "wlccp.msg_id",
 427                     FT_UINT16, BASE_DEC, NULL,
 428                     0x0, "Sequence number used to match request/reply pairs",
 429                     HFILL }
 430                 },
 431
 432
 433                 { &hf_wlccp_flags,
 434                   { "Flags", "wlccp.flags",
 435                     FT_UINT16, BASE_HEX, NULL,
 436                     0x0, "Flags", HFILL }
 437                 },
 438
 439                 { &hf_wlccp_retry_flag,
 440                   { "Retry flag", "wlccp.retry_flag",
 441                     FT_UINT16, BASE_DEC, NULL,
 442                     F_RETRY, "Set on for retransmissions", HFILL }
 443                 },
 444
 445                 { &hf_wlccp_response_request_flag,
 446                   { "Response request flag", "wlccp.response_request_flag",
 447                     FT_UINT16, BASE_DEC, NULL,
 448                     F_RESPONSE_REQUEST, "Set on to request a reply", HFILL }
 449                 },
 450
 451                 { &hf_wlccp_tlv_flag,
 452                   { "TLV flag", "wlccp.tlv_flag",
 453                     FT_UINT16, BASE_DEC, NULL,
 454                     F_TLV, "Set to indicate that optional TLVs follow the fixed fields", HFILL }
 455                 },
 456
 457                 { &hf_wlccp_inbound_flag,
 458                   { "Inbound flag", "wlccp.inbound_flag",
 459                     FT_UINT16, BASE_DEC, NULL,
 460                     F_INBOUND, "Message is inbound to the top of the topology tree", HFILL }
 461                 },
 462
 463                 { &hf_wlccp_outbound_flag,
 464                   { "Outbound flag", "wlccp.outbound_flag",
 465                     FT_UINT16, BASE_DEC, NULL,
 466                     F_OUTBOUND, "Message is outbound from the top of the topology tree", HFILL }
 467                 },
 468
 469                 { &hf_wlccp_hopwise_routing_flag,
 470                   { "Hopwise-routing flag", "wlccp.hopwise_routing_flag",
 471                     FT_UINT16, BASE_DEC, NULL,
 472                     F_HOPWISE_ROUTING, "On to force intermediate access points to process the message also", HFILL }
 473                 },
 474
 475                 { &hf_wlccp_root_cm_flag,
 476                   { "Root context manager flag", "wlccp.root_cm_flag",
 477                     FT_UINT16, BASE_DEC, NULL,
 478                     F_ROOT_CM, "Set to on to send message to the root context manager of the topology tree", HFILL }
 479                 },
 480
 481                 { &hf_wlccp_relay_flag,
 482                   { "Relay flag", "wlccp.relay_flag",
 483                     FT_UINT16, BASE_DEC, NULL,
 484                     F_RELAY, "Signifies that this header is immediately followed by a relay node field", HFILL }
 485                 },
 486
 487                 { &hf_wlccp_mic_flag,
 488                   { "MIC flag", "wlccp.mic_flag",
 489                     FT_UINT16, BASE_DEC, NULL,
 490                     F_MIC, "On in a message that must be authenticated and has an authentication TLV", HFILL }
 491                 },
 492
 493                 { &hf_wlccp_originator_node_type,
 494                   { "Originator node type", "wlccp.originator_node_type",
 495                     FT_UINT8, BASE_DEC, VALS(wlccp_node_type_vs),
 496                     0x0, "Originating device's node type", HFILL }
 497                 },
 498
 499                 { &hf_wlccp_originator,
 500                   { "Originator", "wlccp.originator",
 501                     FT_ETHER, BASE_NONE, NULL,
 502                     0x0, "Originating device's MAC address", HFILL }
 503                 },
 504
 505                 { &hf_wlccp_responder_node_type,
 506                   { "Responder node type", "wlccp.responder_node_type",
 507                     FT_UINT8, BASE_DEC, VALS(wlccp_node_type_vs),
 508                     0x0, "Responding device's node type", HFILL }
 509                 },
 510
 511                 { &hf_wlccp_responder,
 512                   { "Responder", "wlccp.responder",
 513                     FT_ETHER, BASE_NONE, NULL,
 514                     0x0, "Responding device's MAC address", HFILL }
 515                 },
 516
 517                 { &hf_wlccp_relay_node_type,
 518                   { "Relay node type", "wlccp.relay_node_type",
 519                     FT_UINT8, BASE_DEC, VALS(wlccp_node_type_vs),
 520                     0x0, "Type of node which relayed this message", HFILL }
 521                 },
 522
 523                 { &hf_wlccp_relay_node_id,
 524                   { "Relay node ID", "wlccp.relay_node_id",
 525                     FT_ETHER, BASE_NONE, NULL,
 526                     0x0, "Node which relayed this message", HFILL }
 527                 },
 528
 529                 { &hf_wlccp_priority,
 530                   { "WDS priority", "wlccp.priority",
 531                     FT_UINT8, BASE_DEC, NULL, 0,
 532                     "WDS priority of this access point", HFILL }
 533                 },
 534
 535                 { &hf_wlccp_age,
 536                   { "Age", "wlccp.age",
 537                     FT_UINT32, BASE_DEC, NULL, 0,
 538                     "Time since AP became a WDS master", HFILL }
 539                 },
 540
 541                 { &hf_wlccp_period,
 542                   { "Period", "wlccp.period",
 543                     FT_UINT8, BASE_DEC, NULL, 0,
 544                     "Interval between announcements (seconds)", HFILL }
 545                 },
 546
 547                 { &hf_wlccp_ipv4_address,
 548                   { "IPv4 Address", "wlccp.ipv4_address",
 549                     FT_IPv4, BASE_NONE, NULL, 0,
 550                     "IPv4 address of this access point", HFILL }
 551                 }
 552
 553         };
 554
 555         /* Setup protocol subtree array */
 556         static gint *ett[] = {
 557                 &ett_wlccp,
 558                 &ett_wlccp_type,
 559                 &ett_wlccp_flags
 560         };
 561
 562         /* Register the protocol name and description */
 563         proto_wlccp = proto_register_protocol("Cisco Wireless LAN Context Control Protocol", "WLCCP", "wlccp");
 564
 565         /* Required function calls to register the header fields and subtrees used */
 566         proto_register_field_array(proto_wlccp, hf, array_length(hf));
 567         proto_register_subtree_array(ett, array_length(ett));
 568
 569
 570 }
 571
 572
 573 void
 574 proto_reg_handoff_wlccp(void)
 575 {
 576         static gboolean inited = FALSE;
 577
 578         if( !inited ) {
 579
 580                 dissector_handle_t wlccp_handle;
 581
 582                 wlccp_handle = create_dissector_handle(dissect_wlccp,
 583                                                        proto_wlccp);
 584
 585                 dissector_add("ethertype", ETHERTYPE_WLCCP, wlccp_handle);
 586                 dissector_add("udp.port", WLCCP_UDP_PORT, wlccp_handle);
 587                 dissector_add("llc.wlccp_pid", 0x0000, wlccp_handle);
 588
 589                 inited = TRUE;
 590         }
 591 }
 592
 593
 594 void
 595 proto_register_wlccp_oui(void)
 596 {
 597         static hf_register_info hf[] = {
 598                 { &hf_llc_wlccp_pid,
 599                   { "PID", "llc.wlccp_pid",
 600                     FT_UINT16, BASE_HEX, VALS(cisco_pid_vals),
 601                     0x0, "", HFILL }
 602                 }
 603         };
 604
 605         llc_add_oui(OUI_CISCOWL, "llc.wlccp_pid", "Cisco WLCCP OUI PID", hf);
 606 }