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MSWSP: add two more Property Sets
[wireshark-wip.git] / epan / dissectors / packet-lwapp.c
blob06423ae9884f5bd886d225a51df55d02cda1d99e
1 /* packet-lwapp.c
2 *
3 * Routines for LWAPP encapsulated packet disassembly
4 * draft-ohara-capwap-lwapp-N (the current draft is 0)
5 *
6 * $Id$
7 *
8 * Copyright (c) 2003 by David Frascone <dave@frascone.com>
9 *
10 * Wireshark - Network traffic analyzer
11 * By Gerald Combs <gerald@wireshark.org>
12 * Copyright 1998 Gerald Combs
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version 2
17 * of the License, or (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
27 */
28
29 #include "config.h"
30
31 #include <glib.h>
32 #include <epan/filesystem.h>
33 #include <epan/packet.h>
34 #include <epan/addr_resolv.h>
35 #include <epan/prefs.h>
36
37
38 #define LWAPP_FLAGS_T 0x04
39 #define LWAPP_FLAGS_F 0x02
40 #define LWAPP_FLAGS_FT 0x01
41
42 static gint proto_lwapp = -1;
43 static gint proto_lwapp_l3 = -1;
44 static gint proto_lwapp_control = -1;
45 static gint ett_lwapp = -1;
46 static gint ett_lwapp_l3 = -1;
47 static gint ett_lwapp_flags = -1;
48 static gint ett_lwapp_control = -1;
49
50 static gint hf_lwapp_version = -1;
51 static gint hf_lwapp_slotid = -1;
52 static gint hf_lwapp_flags_type = -1;
53 static gint hf_lwapp_flags_fragment = -1;
54 static gint hf_lwapp_flags_fragment_type = -1;
55 static gint hf_lwapp_fragment_id = -1;
56 static gint hf_lwapp_length = -1;
57 static gint hf_lwapp_rssi = -1;
58 static gint hf_lwapp_snr = -1;
59 /* static gint hf_lwapp_control = -1; */
60 static gint hf_lwapp_control_mac = -1;
61 static gint hf_lwapp_control_type = -1;
62 static gint hf_lwapp_control_seq_no = -1;
63 static gint hf_lwapp_control_length = -1;
64
65 static dissector_handle_t eth_withoutfcs_handle;
66 static dissector_handle_t wlan_handle;
67 static dissector_handle_t wlan_bsfc_handle;
68 static dissector_handle_t data_handle;
69
70 /* Set by preferences */
71 static gboolean swap_frame_control;
72
73 typedef struct {
74 guint8 flags;
75 guint8 fragmentId;
76 guint16 length;
77 guint8 rssi;
78 guint8 snr;
79 } LWAPP_Header;
80
81 typedef struct {
82 guint8 tag;
83 guint16 length;
84 } CNTL_Data_Header;
85
86 typedef struct {
87 guint8 type;
88 guint8 seqNo;
89 guint16 length;
90 } CNTL_Header;
91
92 #if 0
93 typedef enum {
94 RESULT_CODE = 1,
95 MWAR_ADDR_PAYLOAD,
96 RAD_PAYLOAD,
97 RAD_SLOT_PAYLOAD,
98 RAD_NAME_PAYLOAD,
99 MWAR_PAYLOAD,
100 VAP_PAYLOAD,
101 STATION_CFG_PAYLOAD,
102 OPERATION_RATE_SET_PAYLOAD,
103 MULTI_DOMAIN_CAPABILITY_PAYLOAD,
104 MAC_OPERATION_PAYLOAD,
105 PHY_TX_POWER_PAYLOAD,
106 PHY_TX_POWER_LEVEL_PAYLOAD,
107 PHY_DSSS_PAYLOAD,
108 PHY_OFDM_PAYLOAD,
109 SUPPORTED_RATES_PAYLOAD,
110 AUTH_PAYLOAD,
111 TEST_PAYLOAD,
112 RRM_NEIGHBOR_CTRL_PAYLOAD,
113 RRM_NOISE_CTRL_PAYLOAD,
114 RRM_NOISE_DATA_PAYLOAD,
115 RRM_INTERFERENCE_CTRL_PAYLOAD,
116 RRM_INTERFERENCE_DATA_PAYLOAD,
117 RRM_LOAD_CTRL_PAYLOAD,
118 RRM_LOAD_DATA_PAYLOAD,
119 CHANGE_STATE_EVENT_PAYLOAD,
120 ADMIN_STATE_PAYLOAD,
121 DELETE_VAP_PAYLOAD,
122 ADD_MOBILE_PAYLOAD,
123 DELETE_MOBILE_PAYLOAD
124 } control_tags;
125 #endif
126
127 typedef enum
128 {
129 DISCOVERY_REQUEST = 1,
130 DISCOVERY_REPLY,
131 JOIN_REQUEST,
132 JOIN_REPLY,
133 HANDOFF_REQUEST,
134 HANDOFF_REPLY,
135 HANDOFF_COMMAND,
136 HANDOFF_RESPONSE,
137 HANDOFF_CONFIRM,
138 CONFIGURE_REQUEST,
139 CONFIGURE_RESPONSE,
140 CONFIGURE_COMMAND,
141 CONFIGURE_COMMAND_RES,
142 STATISTICS_INFO,
143 STATISTICS_INFO_RES,
144 CHANGE_STATE_EVENT,
145 CHANGE_STATE_EVENT_RES,
146 RRM_CONTROL_REQ,
147 RRM_CONTROL_RES,
148 RRM_DATA_REQ,
149 RRM_DATA_RES,
150 ECHO_REQUEST,
151 ECHO_RESPONSE,
152 IMAGE_DATA,
153 IMAGE_DATA_RES,
154 RESET_REQ,
155 RESET_RES,
156 I_AM_UP_REQ,
157 I_AM_UP_RES,
158 KEY_UPDATE_REQ,
159 KEY_UPDATE_RES,
160 PRIMARY_DISCOVERY_REQ,
161 PRIMARY_DISCOVERY_RES,
162 DATA_TRANSFER,
163 DATA_TRANSFER_RES,
164 RESET_REQ_CLEAR_CONFIG
165 } CNTLMsgType;
166
167 static const value_string control_msg_vals[] = {
168 {DISCOVERY_REQUEST , "DISCOVERY_REQUEST"},
169 {DISCOVERY_REPLY , "DISCOVERY_REPLY"},
170 {JOIN_REQUEST , "JOIN_REQUEST"},
171 {JOIN_REPLY , "JOIN_REPLY"},
172 {HANDOFF_REQUEST , "HANDOFF_REQUEST"},
173 {HANDOFF_REPLY , "HANDOFF_REPLY"},
174 {HANDOFF_COMMAND , "HANDOFF_COMMAND"},
175 {HANDOFF_RESPONSE , "HANDOFF_RESPONSE"},
176 {HANDOFF_CONFIRM , "HANDOFF_CONFIRM"},
177 {CONFIGURE_REQUEST , "CONFIGURE_REQUEST"},
178 {CONFIGURE_RESPONSE , "CONFIGURE_RESPONSE"},
179 {CONFIGURE_COMMAND , "CONFIGURE_COMMAND"},
180 {CONFIGURE_COMMAND_RES , "CONFIGURE_COMMAND_RES"},
181 {STATISTICS_INFO , "STATISTICS_INFO"},
182 {STATISTICS_INFO_RES , "STATISTICS_INFO_RES"},
183 {CHANGE_STATE_EVENT , "CHANGE_STATE_EVENT"},
184 {CHANGE_STATE_EVENT_RES , "CHANGE_STATE_EVENT_RES"},
185 {RRM_CONTROL_REQ , "RRM_CONTROL_REQ"},
186 {RRM_CONTROL_RES , "RRM_CONTROL_RES"},
187 {RRM_DATA_REQ , "RRM_DATA_REQ"},
188 {RRM_DATA_RES , "RRM_DATA_RES"},
189 {ECHO_REQUEST , "ECHO_REQUEST"},
190 {ECHO_RESPONSE , "ECHO_RESPONSE"},
191 {IMAGE_DATA , "IMAGE_DATA"},
192 {IMAGE_DATA_RES , "IMAGE_DATA_RES"},
193 {RESET_REQ , "RESET_REQ"},
194 {RESET_RES , "RESET_RES"},
195 {I_AM_UP_REQ , "I_AM_UP_REQ"},
196 {I_AM_UP_RES , "I_AM_UP_RES"},
197 {KEY_UPDATE_REQ , "KEY_UPDATE_REQ"},
198 {KEY_UPDATE_RES , "KEY_UPDATE_RES"},
199 {PRIMARY_DISCOVERY_REQ , "PRIMARY_DISCOVERY_REQ"},
200 {PRIMARY_DISCOVERY_RES , "PRIMARY_DISCOVERY_RES"},
201 {DATA_TRANSFER , "DATA_TRANSFER"},
202 {DATA_TRANSFER_RES , "DATA_TRANSFER_RES"},
203 {RESET_REQ_CLEAR_CONFIG , "RESET_REQ_CLEAR_CONFIG"},
204
205 { 0, NULL}
206 };
207 static value_string_ext control_msg_vals_ext = VALUE_STRING_EXT_INIT(control_msg_vals);
208
209 #if 0
210 static const value_string control_tag_vals[] = {
211
212 {RESULT_CODE , "RESULT_CODE"},
213 {MWAR_ADDR_PAYLOAD , "MWAR_ADDR_PAYLOAD"},
214 {RAD_PAYLOAD , "RAD_PAYLOAD"},
215 {RAD_SLOT_PAYLOAD , "RAD_SLOT_PAYLOAD"},
216 {RAD_NAME_PAYLOAD , "RAD_NAME_PAYLOAD"},
217 {MWAR_PAYLOAD , "MWAR_PAYLOAD"},
218 {VAP_PAYLOAD , "VAP_PAYLOAD"},
219 {STATION_CFG_PAYLOAD , "STATION_CFG_PAYLOAD"},
220 {OPERATION_RATE_SET_PAYLOAD , "OPERATION_RATE_SET_PAYLOAD"},
221 {MULTI_DOMAIN_CAPABILITY_PAYLOAD , "MULTI_DOMAIN_CAPABILITY_PAYLOAD"},
222 {MAC_OPERATION_PAYLOAD , "MAC_OPERATION_PAYLOAD"},
223 {PHY_TX_POWER_PAYLOAD , "PHY_TX_POWER_PAYLOAD"},
224 {PHY_TX_POWER_LEVEL_PAYLOAD , "PHY_TX_POWER_LEVEL_PAYLOAD"},
225 {PHY_DSSS_PAYLOAD , "PHY_DSSS_PAYLOAD"},
226 {PHY_OFDM_PAYLOAD , "PHY_OFDM_PAYLOAD"},
227 {SUPPORTED_RATES_PAYLOAD , "SUPPORTED_RATES_PAYLOAD"},
228 {AUTH_PAYLOAD , "AUTH_PAYLOAD"},
229 {TEST_PAYLOAD , "TEST_PAYLOAD"},
230 {RRM_NEIGHBOR_CTRL_PAYLOAD , "RRM_NEIGHBOR_CTRL_PAYLOAD"},
231 {RRM_NOISE_CTRL_PAYLOAD , "RRM_NOISE_CTRL_PAYLOAD"},
232 {RRM_NOISE_DATA_PAYLOAD , "RRM_NOISE_DATA_PAYLOAD"},
233 {RRM_INTERFERENCE_CTRL_PAYLOAD , "RRM_INTERFERENCE_CTRL_PAYLOAD"},
234 {RRM_INTERFERENCE_DATA_PAYLOAD , "RRM_INTERFERENCE_DATA_PAYLOAD"},
235 {RRM_LOAD_CTRL_PAYLOAD , "RRM_LOAD_CTRL_PAYLOAD"},
236 {RRM_LOAD_DATA_PAYLOAD , "RRM_LOAD_DATA_PAYLOAD"},
237 {CHANGE_STATE_EVENT_PAYLOAD , "CHANGE_STATE_EVENT_PAYLOAD"},
238 {ADMIN_STATE_PAYLOAD , "ADMIN_STATE_PAYLOAD"},
239 {DELETE_VAP_PAYLOAD , "DELETE_VAP_PAYLOAD"},
240 {ADD_MOBILE_PAYLOAD , "ADD_MOBILE_PAYLOAD"},
241 {DELETE_MOBILE_PAYLOAD , "DELETE_MOBILE_PAYLOAD"},
242 {0, NULL}
243 };
244 static value_string_ext control_tag_vals_ext = VALUE_STRING_EXT_INIT(control_tag_vals);
245 #endif
246
247 static const true_false_string lwapp_flags_type = {
248 "LWAPP Control Packet" ,
249 "Encapsulated 80211"
250 };
251
252 /*
253 * dissect lwapp control packets. This is not fully implemented,
254 * but it's a good start.
255 */
256 static void
257 dissect_control(tvbuff_t *tvb, packet_info *pinfo,
258 proto_tree *tree)
259 {
260 CNTL_Header header;
261 proto_tree *control_tree;
262 tvbuff_t *next_tvb;
263
264 /* Set up structures needed to add the protocol subtree and manage it */
265 proto_item *ti;
266 gint offset=0;
267
268 /* Make entries in Protocol column and Info column on summary display */
269 col_set_str(pinfo->cinfo, COL_PROTOCOL, "LWAPP");
270 col_set_str(pinfo->cinfo, COL_INFO,
271 "CNTL ");
272
273 /* Copy our header */
274 tvb_memcpy(tvb, (guint8*) &header, offset, sizeof(header));
275
276 /*
277 * Fix the length (network byte ordering), and set our version &
278 * slot id
279 */
280 header.length = g_ntohs(header.length);
281
282 col_append_str(pinfo->cinfo, COL_INFO,
283 val_to_str_ext(header.type, &control_msg_vals_ext, "Bad Type: 0x%02x"));
284
285 /* In the interest of speed, if "tree" is NULL, don't do any work not
286 necessary to generate protocol tree items. */
287 if (tree) {
288 /* create display subtree for the protocol */
289 ti = proto_tree_add_item(tree, proto_lwapp_control, tvb, offset,
290 -1, ENC_NA);
291 control_tree = proto_item_add_subtree(ti, ett_lwapp_control);
292
293 proto_tree_add_uint(control_tree, hf_lwapp_control_type,
294 tvb, offset, 1, header.type);
295 offset++;
296
297 proto_tree_add_uint(control_tree, hf_lwapp_control_seq_no,
298 tvb, offset, 1, header.seqNo);
299 offset++;
300
301 proto_tree_add_uint(control_tree, hf_lwapp_control_length,
302 tvb, offset, 2, header.length);
303 offset += 2;
304
305 /* Dissect rest of packet as data */
306 next_tvb = tvb_new_subset_remaining(tvb, offset);
307 call_dissector(data_handle,next_tvb, pinfo, tree);
308 }
309
310 } /* dissect_control */
311
312 /*
313 * This lwapp dissector assumes that there is an 802.3 header at
314 * the start of the packet, so it simply re-calls the ethernet
315 * dissector on the packet.
316 */
317 static void
318 dissect_lwapp_l3(tvbuff_t *tvb, packet_info *pinfo,
319 proto_tree *tree)
320 {
321 /* Set up structures needed to add the protocol subtree and manage it */
322 proto_item *ti;
323 proto_tree *lwapp_tree;
324 gint offset = 0;
325 tvbuff_t *next_client;
326
327 /* Make entries in Protocol column and Info column on summary display */
328 col_set_str(pinfo->cinfo, COL_PROTOCOL, "LWAPP-L3");
329 col_set_str(pinfo->cinfo, COL_INFO, "802.3 Packets over Layer 3");
330
331 if (tree) {
332 /* create display subtree for the protocol */
333 ti = proto_tree_add_item(tree, proto_lwapp_l3, tvb, offset,
334 -1, ENC_NA);
335 lwapp_tree = proto_item_add_subtree(ti, ett_lwapp_l3);
336 } else {
337 lwapp_tree = NULL;
338 }
339 /* Dissect as Ethernet */
340 next_client = tvb_new_subset_remaining(tvb, 0);
341 call_dissector(eth_withoutfcs_handle, next_client, pinfo, lwapp_tree);
342 return;
343
344 } /* dissect_lwapp_l3*/
345
346
347 /*
348 * This dissector dissects the lwapp protocol itself. It assumes an
349 * lwapp payload in the data, and doesn't care whether the data was
350 * from a UDP packet, or a Layer 2 one.
351 */
352 static void
353 dissect_lwapp(tvbuff_t *tvb, packet_info *pinfo,
354 proto_tree *tree)
355 {
356 LWAPP_Header header;
357 guint8 slotId;
358 guint8 version;
359 proto_tree *lwapp_tree;
360 proto_tree *flags_tree;
361 tvbuff_t *next_client;
362 guint8 dest_mac[6];
363 guint8 have_destmac=0;
364
365 /* Set up structures needed to add the protocol subtree and manage it */
366 proto_item *ti;
367 gint offset=0;
368
369 /* Make entries in Protocol column and Info column on summary display */
370 col_set_str(pinfo->cinfo, COL_PROTOCOL, "LWAPP");
371 col_set_str(pinfo->cinfo, COL_INFO,
372 "LWAPP IP or Layer 2");
373
374 /* First, set up our dest mac, if we're a control packet with a
375 * dest of port 12223 */
376 if (pinfo->destport == 12223 ) {
377 tvb_memcpy(tvb, dest_mac, offset, 6);
378 have_destmac = 1;
379
380 /* Copy our header */
381 tvb_memcpy(tvb, (guint8*) &header, offset + 6, sizeof(header));
382 } else {
383
384 /* Copy our header */
385 tvb_memcpy(tvb, (guint8*) &header, offset, sizeof(header));
386 }
387
388
389 /*
390 * Fix the length (network byte ordering), and set our version &
391 * slot id
392 */
393 header.length = g_ntohs(header.length);
394 version = (header.flags & 0xc0) >> 6;
395 slotId = (header.flags & 0x38) >> 3;
396
397 if ((header.flags & LWAPP_FLAGS_T) != 0)
398 col_append_str(pinfo->cinfo, COL_INFO,
399 " Control Packet");
400 else
401 col_append_str(pinfo->cinfo, COL_INFO,
402 " 802.11 Packet");
403
404 /* In the interest of speed, if "tree" is NULL, don't do any work not
405 necessary to generate protocol tree items. */
406 if (tree) {
407
408 /* create display subtree for the protocol */
409 ti = proto_tree_add_item(tree, proto_lwapp, tvb, offset, -1, ENC_NA);
410 lwapp_tree = proto_item_add_subtree(ti, ett_lwapp);
411
412 if (have_destmac) {
413 proto_tree_add_ether(lwapp_tree, hf_lwapp_control_mac, tvb, offset,
414 6, dest_mac);
415 offset += 6;
416 }
417
418 proto_tree_add_uint(lwapp_tree, hf_lwapp_version,
419 tvb, offset, 1, version);
420 proto_tree_add_uint(lwapp_tree, hf_lwapp_slotid,
421 tvb, offset, 1, slotId);
422
423 flags_tree = proto_item_add_subtree(lwapp_tree, ett_lwapp_flags);
424 proto_tree_add_boolean(flags_tree, hf_lwapp_flags_type,
425 tvb, offset, 1, header.flags);
426 proto_tree_add_boolean(flags_tree, hf_lwapp_flags_fragment,
427 tvb, offset, 1, header.flags);
428 proto_tree_add_boolean(flags_tree, hf_lwapp_flags_fragment_type,
429 tvb, offset, 1, header.flags);
430 offset++;
431
432 proto_tree_add_uint(lwapp_tree, hf_lwapp_fragment_id,
433 tvb, offset, 1, header.fragmentId);
434 offset++;
435
436 proto_tree_add_uint(lwapp_tree, hf_lwapp_length,
437 tvb, offset, 2, header.length);
438 offset += 2;
439
440 proto_tree_add_uint(lwapp_tree, hf_lwapp_rssi,
441 tvb, offset, 1, header.rssi);
442 offset++;
443 proto_tree_add_uint(lwapp_tree, hf_lwapp_snr,
444 tvb, offset, 1, header.snr);
445 offset++;
446
447
448 } /* tree */
449
450 next_client = tvb_new_subset_remaining(tvb, (have_destmac?6:0) + (int)sizeof(LWAPP_Header));
451 if ((header.flags & LWAPP_FLAGS_T) == 0) {
452 call_dissector(swap_frame_control ? wlan_bsfc_handle : wlan_handle,
453 next_client, pinfo, tree);
454 } else {
455 dissect_control(next_client, pinfo, tree);
456 }
457 return;
458
459 } /* dissect_lwapp*/
460
461 /* registration with the filtering engine */
462 void
463 proto_register_lwapp(void)
464 {
465 static hf_register_info hf[] = {
466 { &hf_lwapp_version,
467 { "Version", "lwapp.version", FT_UINT8, BASE_DEC, NULL, 0x00,
468 NULL, HFILL }},
469 { &hf_lwapp_slotid,
470 { "slotId","lwapp.slotId", FT_UINT24, BASE_DEC, NULL, 0x0,
471 NULL, HFILL }},
472 { &hf_lwapp_flags_type,
473 { "Type", "lwapp.flags.type", FT_BOOLEAN, 8,
474 TFS(&lwapp_flags_type), LWAPP_FLAGS_T, NULL, HFILL }},
475 { &hf_lwapp_flags_fragment,
476 { "Fragment", "lwapp.flags.fragment", FT_BOOLEAN, 8,
477 TFS(&tfs_set_notset), LWAPP_FLAGS_F,
478 NULL, HFILL }},
479 { &hf_lwapp_flags_fragment_type,
480 { "Fragment Type", "lwapp.flags.fragmentType", FT_BOOLEAN, 8,
481 TFS(&tfs_set_notset), LWAPP_FLAGS_FT,
482 NULL, HFILL }},
483 { &hf_lwapp_fragment_id,
484 { "Fragment Id","lwapp.fragmentId", FT_UINT8, BASE_HEX,
485 NULL, 0x0, NULL, HFILL }},
486 { &hf_lwapp_length,
487 { "Length","lwapp.Length", FT_UINT16, BASE_DEC,
488 NULL, 0x0, NULL, HFILL }},
489 { &hf_lwapp_rssi,
490 { "RSSI","lwapp.rssi", FT_UINT8, BASE_HEX,
491 NULL, 0x0, NULL, HFILL }},
492 { &hf_lwapp_snr,
493 { "SNR","lwapp.snr", FT_UINT8, BASE_HEX,
494 NULL, 0x0, NULL, HFILL }},
495 #if 0
496 { &hf_lwapp_control,
497 { "Control Data (not dissected yet)","lwapp.control", FT_BYTES, BASE_NONE,
498 NULL, 0x0, NULL, HFILL }},
499 #endif
500 { &hf_lwapp_control_mac,
501 { "AP Identity", "lwapp.apid", FT_ETHER, BASE_NONE, NULL, 0x0,
502 "Access Point Identity", HFILL }},
503 { &hf_lwapp_control_type,
504 { "Control Type", "lwapp.control.type", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &control_msg_vals_ext, 0x00,
505 NULL, HFILL }},
506 { &hf_lwapp_control_seq_no,
507 { "Control Sequence Number", "lwapp.control.seqno", FT_UINT8, BASE_DEC, NULL, 0x00,
508 NULL, HFILL }},
509 { &hf_lwapp_control_length,
510 { "Control Length","lwapp.control.length", FT_UINT16, BASE_DEC,
511 NULL, 0x0, NULL, HFILL }},
512 };
513 static gint *ett[] = {
514 &ett_lwapp_l3,
515 &ett_lwapp,
516 &ett_lwapp_control,
517 &ett_lwapp_flags
518 };
519 module_t *lwapp_module;
520
521 proto_lwapp = proto_register_protocol ("LWAPP Encapsulated Packet",
522 "LWAPP", "lwapp");
523
524 proto_lwapp_l3 = proto_register_protocol ("LWAPP Layer 3 Packet",
525 "LWAPP-L3", "lwapp-l3");
526
527 proto_lwapp_control = proto_register_protocol ("LWAPP Control Message",
528 "LWAPP-CNTL", "lwapp-cntl");
529 proto_register_field_array(proto_lwapp, hf, array_length(hf));
530 proto_register_subtree_array(ett, array_length(ett));
531
532 lwapp_module = prefs_register_protocol(proto_lwapp, NULL);
533
534 prefs_register_bool_preference(lwapp_module,"swap_fc","Swap Frame Control",
535 "Swap frame control bytes (needed for some APs",
536 &swap_frame_control);
537
538 } /* proto_register_diameter */
539
540 void
541 proto_reg_handoff_lwapp(void)
542 {
543 dissector_handle_t lwapp_l3_handle;
544 dissector_handle_t lwapp_handle;
545
546 /*
547 * Get handles for the Ethernet and wireless dissectors.
548 */
549 eth_withoutfcs_handle = find_dissector("eth_withoutfcs");
550 wlan_handle = find_dissector("wlan");
551 wlan_bsfc_handle = find_dissector("wlan_bsfc");
552 data_handle = find_dissector("data");
553
554 /* This dissector assumes lwapp packets in an 802.3 frame */
555 lwapp_l3_handle = create_dissector_handle(dissect_lwapp_l3, proto_lwapp_l3);
556
557 /* This dissector assumes a lwapp packet */
558 lwapp_handle = create_dissector_handle(dissect_lwapp, proto_lwapp);
559
560 /*
561 * Ok, the following deserves some comments. We have four
562 * different ways lwapp can appear on the wire. Mostly, this is
563 * because lwapp is such a new protocol.
564 *
565 * First, lwapp can join on multiple udp ports, as encapsulated
566 * packets on top of UDP. In this case, there is a full raw
567 * ethernet frame inside of the UDP packet. This method is
568 * becoming obscelete, but we still wanted to dissect the
569 * packets.
570 *
571 * Next, lwapp can be over UDP, but packged for L3 tunneling. This
572 * is the new-style. In this case, LWAP headers are just transmitted
573 * via UDP.
574 *
575 * The last method is lwapp directly over layer 2. For this, we
576 * dissect two different ethertypes (until IANA gives us one)
577 *
578 */
579
580 /* Obsoleted LWAPP via encapsulated 802.3 over UDP */
581
582 dissector_add_uint("udp.port", 12220, lwapp_l3_handle);
583
584 /* new-style lwapp directly over UDP: L3-lwapp*/
585 dissector_add_uint("udp.port", 12222, lwapp_handle);
586 dissector_add_uint("udp.port", 12223, lwapp_handle);
587
588 /* Lwapp over L2 */
589 dissector_add_uint("ethertype", 0x88bb, lwapp_handle);
590 dissector_add_uint("ethertype", 0xbbbb, lwapp_handle);
591
592 }