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Revert "TODO epan/dissectors/asn1/kerberos/packet-kerberos-template.c new GSS flags"
[wireshark-sm.git] / epan / dissectors / packet-lwapp.c
blob1d6b29b9ea8f5b1c8a189059ecc53f24326e973b
1 /* packet-lwapp.c
2 *
3 * Routines for LWAPP encapsulated packet disassembly
4 * RFC 5412
5 *
6 * Copyright (c) 2003 by David Frascone <dave@frascone.com>
7 *
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
11 *
12 * SPDX-License-Identifier: GPL-2.0-or-later
13 */
14
15 #include "config.h"
16
17 #include <epan/packet.h>
18 #include <epan/prefs.h>
19 #include <epan/proto_data.h>
20 #include <epan/expert.h>
21 #include <epan/tfs.h>
22 #include <wsutil/array.h>
23
24 void proto_register_lwapp(void);
25 void proto_reg_handoff_lwapp(void);
26
27 static dissector_handle_t lwapp_l3_handle;
28 static dissector_handle_t lwapp_handle;
29
30 #define LWAPP_8023_PORT 12220 /* Not IANA registered */
31 #define LWAPP_UDP_PORT_RANGE "12222-12223" /* Not IANA registered */
32
33 #define LWAPP_FLAGS_T 0x04
34 #define LWAPP_FLAGS_F 0x02
35 #define LWAPP_FLAGS_FT 0x01
36
37 static int proto_lwapp;
38 static int proto_lwapp_l3;
39 static int proto_lwapp_control;
40 static int ett_lwapp;
41 static int ett_lwapp_l3;
42 static int ett_lwapp_flags;
43 static int ett_lwapp_control;
44
45 static int hf_lwapp_version;
46 static int hf_lwapp_slotid;
47 static int hf_lwapp_flags;
48 static int hf_lwapp_flags_type;
49 static int hf_lwapp_flags_fragment;
50 static int hf_lwapp_flags_fragment_type;
51 static int hf_lwapp_fragment_id;
52 static int hf_lwapp_length;
53 static int hf_lwapp_rssi;
54 static int hf_lwapp_snr;
55 /* static int hf_lwapp_control; */
56 static int hf_lwapp_control_mac;
57 static int hf_lwapp_control_type;
58 static int hf_lwapp_control_seq_no;
59 static int hf_lwapp_control_length;
60
61 #define LWAPP_MAX_NESTED_ENCAP 10
62
63 static expert_field ei_lwapp_too_many_encap;
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
69 /* Set by preferences */
70 static bool swap_frame_control;
71
72 typedef struct {
73 uint8_t flags;
74 uint8_t fragmentId;
75 uint16_t length;
76 uint8_t rssi;
77 uint8_t snr;
78 } LWAPP_Header;
79
80 typedef struct {
81 uint8_t tag;
82 uint16_t length;
83 } CNTL_Data_Header;
84
85 typedef struct {
86 uint8_t type;
87 uint8_t seqNo;
88 uint16_t length;
89 } CNTL_Header;
90
91 #if 0
92 typedef enum {
93 RESULT_CODE = 1,
94 MWAR_ADDR_PAYLOAD,
95 RAD_PAYLOAD,
96 RAD_SLOT_PAYLOAD,
97 RAD_NAME_PAYLOAD,
98 MWAR_PAYLOAD,
99 VAP_PAYLOAD,
100 STATION_CFG_PAYLOAD,
101 OPERATION_RATE_SET_PAYLOAD,
102 MULTI_DOMAIN_CAPABILITY_PAYLOAD,
103 MAC_OPERATION_PAYLOAD,
104 PHY_TX_POWER_PAYLOAD,
105 PHY_TX_POWER_LEVEL_PAYLOAD,
106 PHY_DSSS_PAYLOAD,
107 PHY_OFDM_PAYLOAD,
108 SUPPORTED_RATES_PAYLOAD,
109 AUTH_PAYLOAD,
110 TEST_PAYLOAD,
111 RRM_NEIGHBOR_CTRL_PAYLOAD,
112 RRM_NOISE_CTRL_PAYLOAD,
113 RRM_NOISE_DATA_PAYLOAD,
114 RRM_INTERFERENCE_CTRL_PAYLOAD,
115 RRM_INTERFERENCE_DATA_PAYLOAD,
116 RRM_LOAD_CTRL_PAYLOAD,
117 RRM_LOAD_DATA_PAYLOAD,
118 CHANGE_STATE_EVENT_PAYLOAD,
119 ADMIN_STATE_PAYLOAD,
120 DELETE_VAP_PAYLOAD,
121 ADD_MOBILE_PAYLOAD,
122 DELETE_MOBILE_PAYLOAD
123 } control_tags;
124 #endif
125
126 typedef enum {
127 DISCOVERY_REQUEST = 1,
128 DISCOVERY_REPLY,
129 JOIN_REQUEST,
130 JOIN_REPLY,
131 HANDOFF_REQUEST,
132 HANDOFF_REPLY,
133 HANDOFF_COMMAND,
134 HANDOFF_RESPONSE,
135 HANDOFF_CONFIRM,
136 CONFIGURE_REQUEST,
137 CONFIGURE_RESPONSE,
138 CONFIGURE_COMMAND,
139 CONFIGURE_COMMAND_RES,
140 STATISTICS_INFO,
141 STATISTICS_INFO_RES,
142 CHANGE_STATE_EVENT,
143 CHANGE_STATE_EVENT_RES,
144 RRM_CONTROL_REQ,
145 RRM_CONTROL_RES,
146 RRM_DATA_REQ,
147 RRM_DATA_RES,
148 ECHO_REQUEST,
149 ECHO_RESPONSE,
150 IMAGE_DATA,
151 IMAGE_DATA_RES,
152 RESET_REQ,
153 RESET_RES,
154 I_AM_UP_REQ,
155 I_AM_UP_RES,
156 KEY_UPDATE_REQ,
157 KEY_UPDATE_RES,
158 PRIMARY_DISCOVERY_REQ,
159 PRIMARY_DISCOVERY_RES,
160 DATA_TRANSFER,
161 DATA_TRANSFER_RES,
162 RESET_REQ_CLEAR_CONFIG
163 } CNTLMsgType;
164
165 static const value_string control_msg_vals[] = {
166 {DISCOVERY_REQUEST , "DISCOVERY_REQUEST"},
167 {DISCOVERY_REPLY , "DISCOVERY_REPLY"},
168 {JOIN_REQUEST , "JOIN_REQUEST"},
169 {JOIN_REPLY , "JOIN_REPLY"},
170 {HANDOFF_REQUEST , "HANDOFF_REQUEST"},
171 {HANDOFF_REPLY , "HANDOFF_REPLY"},
172 {HANDOFF_COMMAND , "HANDOFF_COMMAND"},
173 {HANDOFF_RESPONSE , "HANDOFF_RESPONSE"},
174 {HANDOFF_CONFIRM , "HANDOFF_CONFIRM"},
175 {CONFIGURE_REQUEST , "CONFIGURE_REQUEST"},
176 {CONFIGURE_RESPONSE , "CONFIGURE_RESPONSE"},
177 {CONFIGURE_COMMAND , "CONFIGURE_COMMAND"},
178 {CONFIGURE_COMMAND_RES , "CONFIGURE_COMMAND_RES"},
179 {STATISTICS_INFO , "STATISTICS_INFO"},
180 {STATISTICS_INFO_RES , "STATISTICS_INFO_RES"},
181 {CHANGE_STATE_EVENT , "CHANGE_STATE_EVENT"},
182 {CHANGE_STATE_EVENT_RES , "CHANGE_STATE_EVENT_RES"},
183 {RRM_CONTROL_REQ , "RRM_CONTROL_REQ"},
184 {RRM_CONTROL_RES , "RRM_CONTROL_RES"},
185 {RRM_DATA_REQ , "RRM_DATA_REQ"},
186 {RRM_DATA_RES , "RRM_DATA_RES"},
187 {ECHO_REQUEST , "ECHO_REQUEST"},
188 {ECHO_RESPONSE , "ECHO_RESPONSE"},
189 {IMAGE_DATA , "IMAGE_DATA"},
190 {IMAGE_DATA_RES , "IMAGE_DATA_RES"},
191 {RESET_REQ , "RESET_REQ"},
192 {RESET_RES , "RESET_RES"},
193 {I_AM_UP_REQ , "I_AM_UP_REQ"},
194 {I_AM_UP_RES , "I_AM_UP_RES"},
195 {KEY_UPDATE_REQ , "KEY_UPDATE_REQ"},
196 {KEY_UPDATE_RES , "KEY_UPDATE_RES"},
197 {PRIMARY_DISCOVERY_REQ , "PRIMARY_DISCOVERY_REQ"},
198 {PRIMARY_DISCOVERY_RES , "PRIMARY_DISCOVERY_RES"},
199 {DATA_TRANSFER , "DATA_TRANSFER"},
200 {DATA_TRANSFER_RES , "DATA_TRANSFER_RES"},
201 {RESET_REQ_CLEAR_CONFIG , "RESET_REQ_CLEAR_CONFIG"},
202
203 { 0, NULL}
204 };
205 static value_string_ext control_msg_vals_ext = VALUE_STRING_EXT_INIT(control_msg_vals);
206
207 #if 0
208 static const value_string control_tag_vals[] = {
209
210 {RESULT_CODE , "RESULT_CODE"},
211 {MWAR_ADDR_PAYLOAD , "MWAR_ADDR_PAYLOAD"},
212 {RAD_PAYLOAD , "RAD_PAYLOAD"},
213 {RAD_SLOT_PAYLOAD , "RAD_SLOT_PAYLOAD"},
214 {RAD_NAME_PAYLOAD , "RAD_NAME_PAYLOAD"},
215 {MWAR_PAYLOAD , "MWAR_PAYLOAD"},
216 {VAP_PAYLOAD , "VAP_PAYLOAD"},
217 {STATION_CFG_PAYLOAD , "STATION_CFG_PAYLOAD"},
218 {OPERATION_RATE_SET_PAYLOAD , "OPERATION_RATE_SET_PAYLOAD"},
219 {MULTI_DOMAIN_CAPABILITY_PAYLOAD , "MULTI_DOMAIN_CAPABILITY_PAYLOAD"},
220 {MAC_OPERATION_PAYLOAD , "MAC_OPERATION_PAYLOAD"},
221 {PHY_TX_POWER_PAYLOAD , "PHY_TX_POWER_PAYLOAD"},
222 {PHY_TX_POWER_LEVEL_PAYLOAD , "PHY_TX_POWER_LEVEL_PAYLOAD"},
223 {PHY_DSSS_PAYLOAD , "PHY_DSSS_PAYLOAD"},
224 {PHY_OFDM_PAYLOAD , "PHY_OFDM_PAYLOAD"},
225 {SUPPORTED_RATES_PAYLOAD , "SUPPORTED_RATES_PAYLOAD"},
226 {AUTH_PAYLOAD , "AUTH_PAYLOAD"},
227 {TEST_PAYLOAD , "TEST_PAYLOAD"},
228 {RRM_NEIGHBOR_CTRL_PAYLOAD , "RRM_NEIGHBOR_CTRL_PAYLOAD"},
229 {RRM_NOISE_CTRL_PAYLOAD , "RRM_NOISE_CTRL_PAYLOAD"},
230 {RRM_NOISE_DATA_PAYLOAD , "RRM_NOISE_DATA_PAYLOAD"},
231 {RRM_INTERFERENCE_CTRL_PAYLOAD , "RRM_INTERFERENCE_CTRL_PAYLOAD"},
232 {RRM_INTERFERENCE_DATA_PAYLOAD , "RRM_INTERFERENCE_DATA_PAYLOAD"},
233 {RRM_LOAD_CTRL_PAYLOAD , "RRM_LOAD_CTRL_PAYLOAD"},
234 {RRM_LOAD_DATA_PAYLOAD , "RRM_LOAD_DATA_PAYLOAD"},
235 {CHANGE_STATE_EVENT_PAYLOAD , "CHANGE_STATE_EVENT_PAYLOAD"},
236 {ADMIN_STATE_PAYLOAD , "ADMIN_STATE_PAYLOAD"},
237 {DELETE_VAP_PAYLOAD , "DELETE_VAP_PAYLOAD"},
238 {ADD_MOBILE_PAYLOAD , "ADD_MOBILE_PAYLOAD"},
239 {DELETE_MOBILE_PAYLOAD , "DELETE_MOBILE_PAYLOAD"},
240 {0, NULL}
241 };
242 static value_string_ext control_tag_vals_ext = VALUE_STRING_EXT_INIT(control_tag_vals);
243 #endif
244
245 static const true_false_string lwapp_flags_type = {
246 "LWAPP Control Packet" ,
247 "Encapsulated 80211"
248 };
249
250 /*
251 * dissect lwapp control packets. This is not fully implemented,
252 * but it's a good start.
253 */
254 static void
255 dissect_control(tvbuff_t *tvb, packet_info *pinfo,
256 proto_tree *tree)
257 {
258 CNTL_Header header;
259 proto_tree *control_tree;
260 tvbuff_t *next_tvb;
261
262 /* Set up structures needed to add the protocol subtree and manage it */
263 proto_item *ti;
264 int offset=0;
265
266 /* Make entries in Protocol column and Info column on summary display */
267 col_set_str(pinfo->cinfo, COL_PROTOCOL, "LWAPP");
268 col_set_str(pinfo->cinfo, COL_INFO,
269 "CNTL ");
270
271 /* Copy our header */
272 tvb_memcpy(tvb, (uint8_t*) &header, offset, sizeof(header));
273
274 /*
275 * Fix the length (network byte ordering), and set our version &
276 * slot id
277 */
278 header.length = g_ntohs(header.length);
279
280 col_append_str(pinfo->cinfo, COL_INFO,
281 val_to_str_ext(header.type, &control_msg_vals_ext, "Bad Type: 0x%02x"));
282
283 /* In the interest of speed, if "tree" is NULL, don't do any work not
284 necessary to generate protocol tree items. */
285 if (tree) {
286 /* create display subtree for the protocol */
287 ti = proto_tree_add_item(tree, proto_lwapp_control, tvb, offset,
288 -1, ENC_NA);
289 control_tree = proto_item_add_subtree(ti, ett_lwapp_control);
290
291 proto_tree_add_uint(control_tree, hf_lwapp_control_type,
292 tvb, offset, 1, header.type);
293 offset++;
294
295 proto_tree_add_uint(control_tree, hf_lwapp_control_seq_no,
296 tvb, offset, 1, header.seqNo);
297 offset++;
298
299 proto_tree_add_uint(control_tree, hf_lwapp_control_length,
300 tvb, offset, 2, header.length);
301 offset += 2;
302
303 /* Dissect rest of packet as data */
304 next_tvb = tvb_new_subset_remaining(tvb, offset);
305 call_data_dissector(next_tvb, pinfo, tree);
306 }
307
308 } /* dissect_control */
309
310 /*
311 * This lwapp dissector assumes that there is an 802.3 header at
312 * the start of the packet, so it simply re-calls the ethernet
313 * dissector on the packet.
314 */
315 static int
316 dissect_lwapp_l3(tvbuff_t *tvb, packet_info *pinfo,
317 proto_tree *tree, void* data _U_)
318 {
319 /* Set up structures needed to add the protocol subtree and manage it */
320 proto_item *ti;
321 proto_tree *lwapp_tree;
322 int offset = 0;
323 tvbuff_t *next_client;
324
325 /* Make entries in Protocol column and Info column on summary display */
326 col_set_str(pinfo->cinfo, COL_PROTOCOL, "LWAPP-L3");
327 col_set_str(pinfo->cinfo, COL_INFO, "802.3 Packets over Layer 3");
328
329 /* create display subtree for the protocol */
330 ti = proto_tree_add_item(tree, proto_lwapp_l3, tvb, offset,
331 -1, ENC_NA);
332 lwapp_tree = proto_item_add_subtree(ti, ett_lwapp_l3);
333
334 /* Dissect as Ethernet */
335 next_client = tvb_new_subset_remaining(tvb, 0);
336 call_dissector(eth_withoutfcs_handle, next_client, pinfo, lwapp_tree);
337
338 return tvb_captured_length(tvb);
339
340 } /* dissect_lwapp_l3*/
341
342
343 /*
344 * This dissector dissects the lwapp protocol itself. It assumes an
345 * lwapp payload in the data, and doesn't care whether the data was
346 * from a UDP packet, or a Layer 2 one.
347 */
348 static int
349 dissect_lwapp(tvbuff_t *tvb, packet_info *pinfo,
350 proto_tree *tree, void* data _U_)
351 {
352 LWAPP_Header header;
353 uint8_t slotId;
354 uint8_t version;
355 proto_tree *lwapp_tree;
356 tvbuff_t *next_client;
357 uint8_t dest_mac[6];
358 uint8_t have_destmac=0;
359 static int * const flags[] = {
360 &hf_lwapp_flags_type,
361 &hf_lwapp_flags_fragment,
362 &hf_lwapp_flags_fragment_type,
363 NULL
364 };
365 unsigned encap_nested_count;
366
367 /* Set up structures needed to add the protocol subtree and manage it */
368 proto_item *ti;
369 int offset=0;
370
371 /* Make entries in Protocol column and Info column on summary display */
372 col_set_str(pinfo->cinfo, COL_PROTOCOL, "LWAPP");
373 col_set_str(pinfo->cinfo, COL_INFO,
374 "LWAPP IP or Layer 2");
375
376 /* First, set up our dest mac, if we're a control packet with a
377 * dest of port 12223 */
378 if (pinfo->destport == 12223 ) {
379 tvb_memcpy(tvb, dest_mac, offset, 6);
380 have_destmac = 1;
381
382 /* Copy our header */
383 tvb_memcpy(tvb, (uint8_t*) &header, offset + 6, sizeof(header));
384 } else {
385
386 /* Copy our header */
387 tvb_memcpy(tvb, (uint8_t*) &header, offset, sizeof(header));
388 }
389
390
391 /*
392 * Fix the length (network byte ordering), and set our version &
393 * slot id
394 */
395 header.length = g_ntohs(header.length);
396 version = (header.flags & 0xc0) >> 6;
397 slotId = (header.flags & 0x38) >> 3;
398
399 if ((header.flags & LWAPP_FLAGS_T) != 0)
400 col_append_str(pinfo->cinfo, COL_INFO,
401 " Control Packet");
402 else
403 col_append_str(pinfo->cinfo, COL_INFO,
404 " 802.11 Packet");
405
406 /* create display subtree for the protocol */
407 ti = proto_tree_add_item(tree, proto_lwapp, tvb, offset, -1, ENC_NA);
408 encap_nested_count = GPOINTER_TO_UINT(p_get_proto_data(pinfo->pool, pinfo, proto_lwapp, 0));
409 if (++encap_nested_count > LWAPP_MAX_NESTED_ENCAP) {
410 expert_add_info(pinfo, ti, &ei_lwapp_too_many_encap);
411 return tvb_captured_length(tvb);
412 }
413 p_add_proto_data(pinfo->pool, pinfo, proto_lwapp, 0, GUINT_TO_POINTER(encap_nested_count));
414
415 /* In the interest of speed, if "tree" is NULL, don't do any work not
416 necessary to generate protocol tree items. */
417 if (tree) {
418
419 lwapp_tree = proto_item_add_subtree(ti, ett_lwapp);
420
421 if (have_destmac) {
422 proto_tree_add_ether(lwapp_tree, hf_lwapp_control_mac, tvb, offset,
423 6, dest_mac);
424 offset += 6;
425 }
426
427 proto_tree_add_uint(lwapp_tree, hf_lwapp_version,
428 tvb, offset, 1, version);
429 proto_tree_add_uint(lwapp_tree, hf_lwapp_slotid,
430 tvb, offset, 1, slotId);
431
432 proto_tree_add_bitmask(lwapp_tree, tvb, offset, hf_lwapp_flags, ett_lwapp_flags, flags, ENC_NA);
433 offset++;
434
435 proto_tree_add_uint(lwapp_tree, hf_lwapp_fragment_id,
436 tvb, offset, 1, header.fragmentId);
437 offset++;
438
439 proto_tree_add_uint(lwapp_tree, hf_lwapp_length,
440 tvb, offset, 2, header.length);
441 offset += 2;
442
443 proto_tree_add_uint(lwapp_tree, hf_lwapp_rssi,
444 tvb, offset, 1, header.rssi);
445 offset++;
446 proto_tree_add_uint(lwapp_tree, hf_lwapp_snr,
447 tvb, offset, 1, header.snr);
448 offset++;
449
450
451 } /* tree */
452
453 next_client = tvb_new_subset_remaining(tvb, (have_destmac?6:0) + (int)sizeof(LWAPP_Header));
454 if ((header.flags & LWAPP_FLAGS_T) == 0) {
455 call_dissector(swap_frame_control ? wlan_bsfc_handle : wlan_handle,
456 next_client, pinfo, tree);
457 } else {
458 dissect_control(next_client, pinfo, tree);
459 }
460 return tvb_captured_length(tvb);
461
462 } /* dissect_lwapp*/
463
464 /* registration with the filtering engine */
465 void
466 proto_register_lwapp(void)
467 {
468 static hf_register_info hf[] = {
469 { &hf_lwapp_version,
470 { "Version", "lwapp.version", FT_UINT8, BASE_DEC, NULL, 0x00,
471 NULL, HFILL }},
472 { &hf_lwapp_slotid,
473 { "slotId","lwapp.slotId", FT_UINT24, BASE_DEC, NULL, 0x0,
474 NULL, HFILL }},
475 { &hf_lwapp_flags,
476 { "Flags", "lwapp.flags", FT_UINT8, BASE_HEX,
477 NULL, 0x0, NULL, HFILL }},
478 { &hf_lwapp_flags_type,
479 { "Type", "lwapp.flags.type", FT_BOOLEAN, 8,
480 TFS(&lwapp_flags_type), LWAPP_FLAGS_T, NULL, HFILL }},
481 { &hf_lwapp_flags_fragment,
482 { "Fragment", "lwapp.flags.fragment", FT_BOOLEAN, 8,
483 TFS(&tfs_set_notset), LWAPP_FLAGS_F,
484 NULL, HFILL }},
485 { &hf_lwapp_flags_fragment_type,
486 { "Fragment Type", "lwapp.flags.fragmentType", FT_BOOLEAN, 8,
487 TFS(&tfs_set_notset), LWAPP_FLAGS_FT,
488 NULL, HFILL }},
489 { &hf_lwapp_fragment_id,
490 { "Fragment Id","lwapp.fragmentId", FT_UINT8, BASE_HEX,
491 NULL, 0x0, NULL, HFILL }},
492 { &hf_lwapp_length,
493 { "Length","lwapp.Length", FT_UINT16, BASE_DEC,
494 NULL, 0x0, NULL, HFILL }},
495 { &hf_lwapp_rssi,
496 { "RSSI","lwapp.rssi", FT_UINT8, BASE_HEX,
497 NULL, 0x0, NULL, HFILL }},
498 { &hf_lwapp_snr,
499 { "SNR","lwapp.snr", FT_UINT8, BASE_HEX,
500 NULL, 0x0, NULL, HFILL }},
501 #if 0
502 { &hf_lwapp_control,
503 { "Control Data (not dissected yet)","lwapp.control", FT_BYTES, BASE_NONE,
504 NULL, 0x0, NULL, HFILL }},
505 #endif
506 { &hf_lwapp_control_mac,
507 { "AP Identity", "lwapp.apid", FT_ETHER, BASE_NONE, NULL, 0x0,
508 "Access Point Identity", HFILL }},
509 { &hf_lwapp_control_type,
510 { "Control Type", "lwapp.control.type", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &control_msg_vals_ext, 0x00,
511 NULL, HFILL }},
512 { &hf_lwapp_control_seq_no,
513 { "Control Sequence Number", "lwapp.control.seqno", FT_UINT8, BASE_DEC, NULL, 0x00,
514 NULL, HFILL }},
515 { &hf_lwapp_control_length,
516 { "Control Length","lwapp.control.length", FT_UINT16, BASE_DEC,
517 NULL, 0x0, NULL, HFILL }},
518 };
519 static int *ett[] = {
520 &ett_lwapp_l3,
521 &ett_lwapp,
522 &ett_lwapp_control,
523 &ett_lwapp_flags
524 };
525 static ei_register_info ei[] = {
526 { &ei_lwapp_too_many_encap, { "lwapp.too_many_encap", PI_UNDECODED, PI_WARN, "Too many LWAPP encapsulation levels", EXPFILL }}
527 };
528 module_t *lwapp_module;
529 expert_module_t* expert_lwapp;
530
531 proto_lwapp = proto_register_protocol ("LWAPP Encapsulated Packet", "LWAPP", "lwapp");
532
533 proto_lwapp_l3 = proto_register_protocol_in_name_only ("LWAPP Layer 3 Packet", "LWAPP-L3", "lwapp-l3", proto_lwapp, FT_PROTOCOL);
534
535 proto_lwapp_control = proto_register_protocol_in_name_only ("LWAPP Control Message", "LWAPP-CNTL", "lwapp-cntl", proto_lwapp, FT_PROTOCOL);
536 proto_register_field_array(proto_lwapp, hf, array_length(hf));
537 proto_register_subtree_array(ett, array_length(ett));
538 expert_lwapp = expert_register_protocol(proto_lwapp);
539 expert_register_field_array(expert_lwapp, ei, array_length(ei));
540
541 lwapp_module = prefs_register_protocol(proto_lwapp, NULL);
542
543 prefs_register_bool_preference(lwapp_module,"swap_fc","Swap Frame Control",
544 "Swap frame control bytes (needed for some APs).",
545 &swap_frame_control);
546
547 /* This dissector assumes lwapp packets in an 802.3 frame */
548 lwapp_l3_handle = register_dissector("lwapp-l3", dissect_lwapp_l3, proto_lwapp_l3);
549
550 /* This dissector assumes a lwapp packet */
551 lwapp_handle = register_dissector("lwapp", dissect_lwapp, proto_lwapp);
552 }
553
554 void
555 proto_reg_handoff_lwapp(void)
556 {
557 /*
558 * Get handles for the Ethernet and wireless dissectors.
559 */
560 eth_withoutfcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_lwapp);
561 wlan_handle = find_dissector_add_dependency("wlan_withoutfcs", proto_lwapp);
562 wlan_bsfc_handle = find_dissector_add_dependency("wlan_bsfc", proto_lwapp);
563
564 /*
565 * Ok, the following deserves some comments. We have four
566 * different ways lwapp can appear on the wire. Mostly, this is
567 * because lwapp is such a new protocol.
568 *
569 * First, lwapp can join on multiple udp ports, as encapsulated
570 * packets on top of UDP. In this case, there is a full raw
571 * ethernet frame inside of the UDP packet. This method is
572 * becoming obscelete, but we still wanted to dissect the
573 * packets.
574 *
575 * Next, lwapp can be over UDP, but packaged for L3 tunneling. This
576 * is the new-style. In this case, LWAP headers are just transmitted
577 * via UDP.
578 *
579 * The last method is lwapp directly over layer 2. For this, we
580 * dissect two different ethertypes (until IANA gives us one)
581 *
582 */
583
584 /* Obsoleted LWAPP via encapsulated 802.3 over UDP */
585 dissector_add_uint_with_preference("udp.port", LWAPP_8023_PORT, lwapp_l3_handle);
586
587 /* new-style lwapp directly over UDP: L3-lwapp*/
588 dissector_add_uint_range_with_preference("udp.port", LWAPP_UDP_PORT_RANGE, lwapp_handle);
589
590 /* Lwapp over L2 */
591 dissector_add_uint("ethertype", 0x88bb, lwapp_handle);
592 dissector_add_uint("ethertype", 0xbbbb, lwapp_handle);
593
594 }
595
596 /*
597 * Editor modelines - https://www.wireshark.org/tools/modelines.html
598 *
599 * Local variables:
600 * c-basic-offset: 4
601 * tab-width: 8
602 * indent-tabs-mode: nil
603 * End:
604 *
605 * vi: set shiftwidth=4 tabstop=8 expandtab:
606 * :indentSize=4:tabSize=8:noTabs=true:
607 */
Metzes wireshark repo