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Revert "TODO epan/dissectors/asn1/kerberos/packet-kerberos-template.c new GSS flags"
[wireshark-sm.git] / epan / dissectors / packet-sametime.c
blob39fb542937c9f3b58588796ba97f421104cf7173
1 /* packet-sametime.c
2 * Routines for SAMETIME dissection
3 * Copyright 2010, Toralf Foerster <toralf.foerster [AT] gmx.de>
4 *
5 * Wireshark - Network traffic analyzer
6 * By Gerald Combs <gerald@wireshark.org>
7 * Copyright 1998 Gerald Combs
8 *
9 * SPDX-License-Identifier: GPL-2.0-or-later
10 */
11
12 #include "config.h"
13
14 #include <epan/packet.h>
15 #include <epan/prefs.h>
16 #include <epan/stats_tree.h>
17 #include "packet-tcp.h"
18
19 #define DEFAULT_SAMETIME_PORT 1533 /* Not IANA registered */
20
21 void proto_register_sametime(void);
22 void proto_reg_handoff_sametime(void);
23
24 static int proto_sametime;
25 static dissector_handle_t sametime_handle;
26
27 /*preferences*/
28 static bool global_sametime_show_length;
29 static bool global_sametime_reassemble_packets = true;
30
31 /*heart beat*/
32 static int hf_sametime_heartbeat;
33
34 /*sametime message header*/
35 static int hf_sametime_message_length;
36 static int hf_sametime_message_type;
37 static int hf_sametime_message_options;
38 static int hf_sametime_message_options_attribute;
39 static int hf_sametime_message_options_encrypted;
40 static int hf_sametime_message_channel;
41
42 /*common types*/
43 static int hf_sametime_field_length;
44 static int hf_sametime_field_text;
45 static int hf_sametime_code;
46 static int hf_sametime_login_type;
47 static int hf_sametime_time;
48
49 /*handshake*/
50 static int hf_sametime_handshake_major;
51 static int hf_sametime_handshake_minor;
52 static int hf_sametime_handshake_srvrcalc_addr;
53 static int hf_sametime_handshake_loclcalc_addr;
54
55 /*channel*/
56 static int hf_sametime_channel_service;
57 static int hf_sametime_channel_id;
58 static int hf_sametime_channel_send_type;
59 static int hf_sametime_channel_awareness;
60
61 /*user status*/
62 static int hf_sametime_user_status;
63
64 /*location*/
65 static int hf_sametime_location_country;
66 static int hf_sametime_location_postalcode;
67 static int hf_sametime_location_province;
68 static int hf_sametime_location_city;
69 static int hf_sametime_location_phone;
70 static int hf_sametime_location_name;
71 static int hf_sametime_location_timezone;
72
73 /*packet detail tree*/
74 static int ett_sametime;
75 static int ett_sametime_options;
76
77 /*statistics*/
78 static int sametime_tap;
79 static const uint8_t* st_str_packet = "Sametime Message Count";
80 static const uint8_t* st_str_message_type = "Message Type";
81 static const uint8_t* st_str_send_type = "Send Type";
82 static const uint8_t* st_str_user_status = "User Status";
83 static int st_node_packet = -1;
84 static int st_node_message_type = -1;
85 static int st_node_send_type = -1;
86 static int st_node_user_status = -1;
87
88 typedef struct SametimeTap {
89 int message_type;
90 int send_type;
91 int user_status;
92 } SametimeTap;
93
94 #define SAMETIME_MESSAGETYPE_HEARTBEAT 0x80
95 #define SAMETIME_MESSAGETYPE_HANDSHAKE 0x0000
96
97 #define SAMETIME_MESSAGETYPE_HANDSHAKE_ACK 0x8000
98 #define SAMETIME_MESSAGETYPE_HANDSHAKE_SYN 0x0025
99 #define SAMETIME_MESSAGETYPE_LOGIN 0x0001
100 #define SAMETIME_MESSAGETYPE_LOGIN_ACK 0x8001
101 #define SAMETIME_MESSAGETYPE_LOGIN_REDIRECT 0x0018
102 #define SAMETIME_MESSAGETYPE_LOGIN_CONTINUE 0x0016
103
104 #define SAMETIME_MESSAGETYPE_CHANNEL_CREATE 0x0002
105 #define SAMETIME_MESSAGETYPE_CHANNEL_DESTROY 0x0003
106 #define SAMETIME_MESSAGETYPE_CHANNEL_SEND 0x0004
107 #define SAMETIME_MESSAGETYPE_CHANNEL_ACCEPT 0x0006
108
109 #define SAMETIME_MESSAGETYPE_SET_USER_STATUS 0x0009
110 #define SAMETIME_MESSAGETYPE_SET_PRIVACY_LIST 0x000b
111 #define SAMETIME_MESSAGETYPE_SENSE_SERVICE 0x0011
112 #define SAMETIME_MESSAGETYPE_ADMIN 0x0019
113 #define SAMETIME_MESSAGETYPE_ANNOUNCE 0x0022
114
115
116 static const value_string messagetypenames[] = {
117 { SAMETIME_MESSAGETYPE_HEARTBEAT, "HEARTBEAT" },
118
119 { SAMETIME_MESSAGETYPE_HANDSHAKE, "HANDSHAKE" },
120 { SAMETIME_MESSAGETYPE_HANDSHAKE_SYN, "HANDSHAKE_SYN" },
121 { SAMETIME_MESSAGETYPE_HANDSHAKE_ACK, "HANDSHAKE_ACK" },
122 { SAMETIME_MESSAGETYPE_LOGIN, "LOGIN" },
123 { SAMETIME_MESSAGETYPE_LOGIN_ACK, "LOGIN_ACK" },
124 { SAMETIME_MESSAGETYPE_LOGIN_REDIRECT, "LOGIN_REDIRECT" },
125 { SAMETIME_MESSAGETYPE_LOGIN_CONTINUE, "LOGIN_CONTINUE" },
126
127 { SAMETIME_MESSAGETYPE_CHANNEL_CREATE, "CHANNEL_CREATE" },
128 { SAMETIME_MESSAGETYPE_CHANNEL_DESTROY, "CHANNEL_DESTROY" },
129 { SAMETIME_MESSAGETYPE_CHANNEL_SEND, "CHANNEL_SEND" },
130 { SAMETIME_MESSAGETYPE_CHANNEL_ACCEPT, "CHANNEL_ACCEPT" },
131
132 { SAMETIME_MESSAGETYPE_SET_USER_STATUS, "SET_USER_STATUS" },
133 { SAMETIME_MESSAGETYPE_SET_PRIVACY_LIST, "SET_PRIVACY_LIST" },
134 { SAMETIME_MESSAGETYPE_SENSE_SERVICE, "SENSE_SERVICE" },
135 { SAMETIME_MESSAGETYPE_ADMIN, "ADMIN" },
136 { SAMETIME_MESSAGETYPE_ANNOUNCE, "ANNOUNCE" },
137
138 { 0, NULL }
139 };
140
141 #define SAMETIME_MESSAGEOPTION_ENCRYPT 0x4000
142 #define SAMETIME_MESSAGEOPTION_HAS_ATTRIBS 0x8000
143
144 static const value_string optionnames[] = {
145 { 0x0, "" },
146 { SAMETIME_MESSAGEOPTION_ENCRYPT, "ENCRYPT" },
147 { SAMETIME_MESSAGEOPTION_HAS_ATTRIBS, "HAS_ATTRIBS" },
148
149 { 0, NULL }
150 };
151
152 static const value_string userstatusnames[] = {
153 { 0x0020, "ACTIVE" }, /* "I am available" */
154 { 0x0040, "IDLE" }, /* never seen in the wild, maybe non-pc :-) ? */
155 { 0x0060, "AWAY" }, /* "I am away from my computer now" */
156 { 0x0080, "BUSY" }, /* "Please do not disturb me" */
157 { 0x0008, "MEETING" }, /* "I am in a meeting" */
158
159 { 0, NULL }
160 };
161
162 #define SAMETIME_SENDTYPE_AWARE_ADD 0x0068
163 #define SAMETIME_SENDTYPE_OPT_DO_SET 0x00c9
164 #define SAMETIME_SENDTYPE_AWARE_SNAPSHOT 0x01f4
165 #define SAMETIME_SENDTYPE_AWARE_UPDATE 0x01f5
166 #define SAMETIME_SENDTYPE_OPT_GOT_SET 0x0259
167
168 static const value_string sendtypenames[] = {
169 { SAMETIME_SENDTYPE_AWARE_ADD, "AWARE_ADD" },
170 { 0x0069, "AWARE_REMOVE" },
171 { SAMETIME_SENDTYPE_OPT_DO_SET, "OPT_DO_SET" },
172 { 0x00cb, "OPT_WATCH" },
173 { SAMETIME_SENDTYPE_AWARE_SNAPSHOT, "AWARE_SNAPSHOT" },
174 { SAMETIME_SENDTYPE_AWARE_UPDATE, "AWARE_UPDATE" },
175 { SAMETIME_SENDTYPE_OPT_GOT_SET, "OPT_GOT_SET" },
176 { 0x025a, "?" },
177 { 0x025d, "OPT_DID_SET" },
178
179 { 0, NULL }
180 };
181
182 static const value_string awarenessnames[] = {
183 { 0x0002, "USER" },
184 { 0x0003, "GROUP" },
185 { 0x0008, "SERVER" },
186 { 0, NULL }
187 };
188
189 static const value_string codenames[] = {
190 { 0x00000011, "SERVICE_AWARE" },
191 { 0x00000015, "SERVICE_RESOLVE" },
192 { 0x00000018, "SERVICE_STORAGE" },
193 { 0x0000001a, "SERVICE_DIRECTORY" },
194
195 { 0x80000011, "ERR_USER_SKETCHY" },
196 { 0x80000015, "ERR_TOKEN_INVALID" },
197 { 0x80000018, "ERR_PORT_IN_USE" },
198 { 0x80000022, "ERR_CHANNEL_DESTROYED" },
199
200 { 0, NULL }
201 };
202
203
204 static int
205 add_text_item(tvbuff_t *tvb, proto_tree *tree, int offset, int hf)
206 {
207 uint16_t length;
208
209 /* heuristic rule, string should start w/ valid character(s) */
210 if (! tvb_get_uint8(tvb, offset + 2))
211 return 0;
212
213 length = tvb_get_ntohs(tvb, offset);
214 if (length) {
215 /* the string length must not exceed the packet length */
216 if (length > tvb_reported_length_remaining(tvb, offset + 2))
217 return 0;
218
219 /* add string length only if preferences is set */
220 if (global_sametime_show_length)
221 proto_tree_add_item(tree, hf_sametime_field_length, tvb, offset, 2, ENC_BIG_ENDIAN);
222
223 /* add string */
224 proto_tree_add_item(tree, hf, tvb, offset + 2, length, ENC_ASCII|ENC_NA);
225 }
226
227 return 2 + length;
228 }
229
230
231 static uint16_t
232 dissect_set_user_status(tvbuff_t *tvb, proto_tree *tree, int offset)
233 {
234 uint16_t user_status;
235
236 user_status = tvb_get_ntohs(tvb, offset);
237 proto_item_append_text(tree, ", %s", val_to_str(user_status, userstatusnames, "0x%04x"));
238 proto_tree_add_item(tree, hf_sametime_user_status, tvb, offset, 2, ENC_BIG_ENDIAN);
239 offset += 2;
240 proto_tree_add_item(tree, hf_sametime_time, tvb, offset, 4, ENC_BIG_ENDIAN);
241 offset += 4;
242 add_text_item(tvb, tree, offset, hf_sametime_field_text);
243
244 return user_status;
245 }
246
247
248 static int
249 dissect_handshake(tvbuff_t *tvb, proto_tree *tree, int offset)
250 {
251 proto_tree_add_item(tree, hf_sametime_handshake_major, tvb, offset, 2, ENC_BIG_ENDIAN);
252 offset += 2;
253 proto_tree_add_item(tree, hf_sametime_handshake_minor, tvb, offset, 2, ENC_BIG_ENDIAN);
254 offset += 2;
255 offset += 4;
256 proto_tree_add_item(tree, hf_sametime_handshake_srvrcalc_addr, tvb, offset, 4, ENC_BIG_ENDIAN);
257 offset += 4;
258 proto_tree_add_item(tree, hf_sametime_login_type, tvb, offset, 2, ENC_BIG_ENDIAN);
259 offset += 2;
260 proto_tree_add_item(tree, hf_sametime_handshake_loclcalc_addr, tvb, offset, 4, ENC_BIG_ENDIAN);
261 offset += 4;
262 offset += 6;
263 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
264 offset += 8;
265 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
266
267 return offset;
268 }
269
270
271 static void
272 dissect_handshake_ack(tvbuff_t *tvb, proto_tree *tree, int offset)
273 {
274 proto_tree_add_item(tree, hf_sametime_handshake_major, tvb, offset, 2, ENC_BIG_ENDIAN);
275 offset += 2;
276 proto_tree_add_item(tree, hf_sametime_handshake_minor, tvb, offset, 2, ENC_BIG_ENDIAN);
277 offset += 2;
278 proto_tree_add_item(tree, hf_sametime_handshake_loclcalc_addr, tvb, offset, 4, ENC_BIG_ENDIAN);
279 offset += 4;
280 offset += 4;
281 offset += 4;
282 add_text_item(tvb, tree, offset, hf_sametime_field_text);
283 }
284
285
286 static void
287 dissect_login(tvbuff_t *tvb, proto_tree *tree, int offset)
288 {
289 offset += 2;
290 add_text_item(tvb, tree, offset, hf_sametime_field_text);
291 }
292
293
294 static void
295 dissect_login_redirect(tvbuff_t *tvb, proto_tree *tree, int offset)
296 {
297 offset += 2;
298 add_text_item(tvb, tree, offset, hf_sametime_field_text);
299 }
300
301
302 static void
303 dissect_login_ack(tvbuff_t *tvb, proto_tree *tree, int offset)
304 {
305 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
306 proto_tree_add_item(tree, hf_sametime_login_type, tvb, offset, 2, ENC_BIG_ENDIAN);
307 offset += 2;
308 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
309 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
310 offset += 3;
311 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
312 proto_tree_add_item(tree, hf_sametime_handshake_loclcalc_addr, tvb, offset, 4, ENC_BIG_ENDIAN);
313 offset += 4;
314 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
315 offset += 21;
316 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
317 add_text_item(tvb, tree, offset, hf_sametime_field_text);
318 }
319
320
321 static void
322 dissect_channel_create(tvbuff_t *tvb, proto_tree *tree, int offset)
323 {
324 offset += 4;
325 proto_tree_add_item(tree, hf_sametime_channel_id, tvb, offset, 4, ENC_BIG_ENDIAN);
326 offset += 4;
327 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
328 proto_tree_add_item(tree, hf_sametime_channel_service, tvb, offset, 4, ENC_BIG_ENDIAN);
329 offset += 4;
330 offset += 8;
331 add_text_item(tvb, tree, offset, hf_sametime_field_text);
332 }
333
334
335 static uint16_t
336 dissect_channel_send(tvbuff_t *tvb, proto_tree *tree, int offset)
337 {
338 uint16_t send_type, awareness;
339 unsigned na;
340
341 send_type = tvb_get_ntohs(tvb, offset);
342 proto_item_append_text(tree, ", %s", val_to_str(send_type, sendtypenames, "0x%04x"));
343 proto_tree_add_item(tree, hf_sametime_channel_send_type, tvb, offset, 2, ENC_BIG_ENDIAN);
344 offset += 2;
345
346 switch (send_type) {
347 case SAMETIME_SENDTYPE_AWARE_ADD:
348 offset += 8;
349 awareness = tvb_get_ntohs(tvb, offset);
350 proto_item_append_text(tree, ", %s", val_to_str(awareness, awarenessnames, "0x%04x"));
351 proto_tree_add_item(tree, hf_sametime_channel_awareness, tvb, offset, 2, ENC_BIG_ENDIAN);
352 offset += 2;
353 add_text_item(tvb, tree, offset, hf_sametime_field_text);
354
355 break;
356
357 case SAMETIME_SENDTYPE_OPT_DO_SET:
358 offset += 20;
359 na = tvb_get_ntohl(tvb, offset);
360 offset += 4;
361 if (na == 0x33) {
362 offset += add_text_item(tvb, tree, offset, hf_sametime_location_country);
363 offset += add_text_item(tvb, tree, offset, hf_sametime_location_postalcode);
364 offset += add_text_item(tvb, tree, offset, hf_sametime_location_province);
365 offset += add_text_item(tvb, tree, offset, hf_sametime_location_city);
366 offset += add_text_item(tvb, tree, offset, hf_sametime_location_phone);
367 offset += 1;
368 offset += add_text_item(tvb, tree, offset, hf_sametime_location_name);
369 add_text_item(tvb, tree, offset, hf_sametime_location_timezone);
370 } else {
371 add_text_item(tvb, tree, offset, hf_sametime_field_text);
372 }
373
374 break;
375
376 case SAMETIME_SENDTYPE_OPT_GOT_SET:
377 offset += 8;
378 awareness = tvb_get_ntohs(tvb, offset);
379 proto_item_append_text(tree, ", %s", val_to_str(awareness, awarenessnames, "0x%04x"));
380 proto_tree_add_item(tree, hf_sametime_channel_awareness, tvb, offset, 2, ENC_BIG_ENDIAN);
381 offset += 2;
382 while (tvb_reported_length_remaining(tvb, offset) > 2) {
383 int n = add_text_item(tvb, tree, offset, hf_sametime_field_text);
384 offset += (n) ? n : 1;
385 }
386
387 break;
388
389 case SAMETIME_SENDTYPE_AWARE_SNAPSHOT:
390 offset += 12;
391 awareness = tvb_get_ntohs(tvb, offset);
392 proto_item_append_text(tree, ", %s", val_to_str(awareness, awarenessnames, "0x%04x"));
393 proto_tree_add_item(tree, hf_sametime_channel_awareness, tvb, offset, 2, ENC_BIG_ENDIAN);
394 offset += 2;
395 add_text_item(tvb, tree, offset, hf_sametime_field_text);
396
397 break;
398
399 case SAMETIME_SENDTYPE_AWARE_UPDATE:
400 offset += 4;
401 offset += 4;
402 awareness = tvb_get_ntohs(tvb, offset);
403 proto_item_append_text(tree, ", %s", val_to_str(awareness, awarenessnames, "0x%04x"));
404 proto_tree_add_item(tree, hf_sametime_channel_awareness, tvb, offset, 2, ENC_BIG_ENDIAN);
405 offset += 2;
406 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
407 offset += 4;
408 if (tvb_get_uint8(tvb, offset)) {
409 offset += 1;
410 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
411 dissect_set_user_status(tvb, tree, offset);
412 }
413
414 break;
415
416 case 0x0000:
417 offset += 14;
418 add_text_item(tvb, tree, offset, hf_sametime_field_text);
419
420 break;
421
422 case 0x0002:
423 offset += 8;
424 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
425 offset += 3;
426 add_text_item(tvb, tree, offset, hf_sametime_field_text);
427
428 break;
429
430 case 0x0005: /* XML */
431 if (26 <= tvb_reported_length_remaining(tvb, offset + 2)) {
432 offset += 26;
433 add_text_item(tvb, tree, offset, hf_sametime_field_text);
434 }
435
436 break;
437
438 case 0x0007:
439 offset += 8;
440 if (4 <= tvb_reported_length_remaining(tvb, offset + 2)) {
441 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
442 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
443 offset += 3;
444 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
445 add_text_item(tvb, tree, offset, hf_sametime_field_text);
446 }
447
448 break;
449
450 case 0x025a:
451 offset += 10;
452 add_text_item(tvb, tree, offset, hf_sametime_field_text);
453
454 break;
455
456 default:
457 break;
458 }
459
460 return send_type;
461 }
462
463
464 static void
465 dissect_channel_accept(tvbuff_t *tvb, proto_tree *tree, int offset)
466 {
467 offset += 34;
468 if (tvb_reported_length_remaining(tvb, offset + 2)) {
469 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
470 if (tvb_get_uint8(tvb, offset)) {
471 offset += 1;
472 offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
473 dissect_set_user_status(tvb, tree, offset);
474 }
475 }
476 }
477
478
479 static void
480 dissect_sense_service(tvbuff_t *tvb, proto_tree *tree, int offset)
481 {
482 uint32_t code;
483
484 code = tvb_get_ntohl(tvb, offset);
485 proto_item_append_text(tree, ", %s", val_to_str(code, codenames, "0x%04x"));
486 proto_tree_add_item(tree, hf_sametime_code, tvb, offset, 4, ENC_BIG_ENDIAN);
487 }
488
489
490 /*
491 here we really dissect the message(s)
492 */
493 static int
494 dissect_sametime_content(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
495 {
496 proto_tree *sametime_tree;
497 proto_item *ti;
498 static SametimeTap *sinfo;
499 int message_type;
500 int packet_length, offset = 0;
501
502 /* we expect either 1 heartbeat byte (0x80) or a sametime message */
503 packet_length = tvb_reported_length_remaining(tvb, offset);
504 if (packet_length == 1) {
505 message_type = tvb_get_uint8(tvb, 0);
506
507 } else if (packet_length < 12) {
508 message_type = -1;
509
510 } else {
511 message_type = tvb_get_ntohs(tvb, 4);
512 }
513
514 /* add message type */
515 col_append_str(pinfo->cinfo, COL_INFO, val_to_str(message_type, messagetypenames, "0x%04x"));
516 col_append_str(pinfo->cinfo, COL_INFO, " ");
517
518 /* message type statistic */
519 sinfo = wmem_new(pinfo->pool, struct SametimeTap);
520 sinfo->message_type = message_type;
521 sinfo->send_type = -1;
522 sinfo->user_status = -1;
523
524 /* packet detail tree */
525 ti = proto_tree_add_item(tree, proto_sametime, tvb, offset, -1, ENC_NA);
526 sametime_tree = proto_item_add_subtree(ti, ett_sametime);
527 proto_item_append_text(sametime_tree, ", %s", val_to_str(message_type, messagetypenames, "0x%04x"));
528
529 /* dissect message */
530 if (message_type == SAMETIME_MESSAGETYPE_HEARTBEAT) {
531 proto_tree_add_item(sametime_tree, hf_sametime_heartbeat, tvb, offset, 1, ENC_BIG_ENDIAN);
532
533 } else if (message_type != -1) {
534 proto_tree *options_tree;
535 proto_item *op;
536
537 /* first 4 bytes gives the length of the sametime message */
538 if (global_sametime_show_length) {
539 proto_tree_add_item(sametime_tree, hf_sametime_message_length, tvb, offset, 4, ENC_BIG_ENDIAN);
540 }
541 offset += 4;
542
543 /* next 2 bytes gives the message type */
544 proto_tree_add_item(sametime_tree, hf_sametime_message_type, tvb, offset, 2, ENC_BIG_ENDIAN);
545 offset += 2;
546
547 /* next 2 bytes are the message options */
548 op = proto_tree_add_item(sametime_tree, hf_sametime_message_options, tvb, offset, 2, ENC_BIG_ENDIAN);
549 options_tree = proto_item_add_subtree(op, ett_sametime_options);
550 proto_tree_add_item(options_tree, hf_sametime_message_options_attribute, tvb, offset, 2, ENC_BIG_ENDIAN);
551 proto_tree_add_item(options_tree, hf_sametime_message_options_encrypted, tvb, offset, 2, ENC_BIG_ENDIAN);
552 offset += 2;
553
554 /* next 4 bytes contains the channel id */
555 proto_tree_add_item(sametime_tree, hf_sametime_message_channel, tvb, offset, 4, ENC_BIG_ENDIAN);
556 offset += 4;
557
558 switch (message_type)
559 {
560 case SAMETIME_MESSAGETYPE_HANDSHAKE:
561 dissect_handshake(tvb, sametime_tree, offset);
562 break;
563
564 case SAMETIME_MESSAGETYPE_HANDSHAKE_ACK:
565 dissect_handshake_ack(tvb, sametime_tree, offset);
566 break;
567
568 case SAMETIME_MESSAGETYPE_HANDSHAKE_SYN:
569 break;
570
571 case SAMETIME_MESSAGETYPE_LOGIN:
572 dissect_login(tvb, sametime_tree, offset);
573 break;
574
575 case SAMETIME_MESSAGETYPE_LOGIN_REDIRECT:
576 dissect_login_redirect(tvb, sametime_tree, offset);
577 break;
578
579 case SAMETIME_MESSAGETYPE_LOGIN_ACK:
580 dissect_login_ack(tvb, sametime_tree, offset);
581 break;
582
583 case SAMETIME_MESSAGETYPE_CHANNEL_CREATE:
584 dissect_channel_create(tvb, sametime_tree, offset);
585 break;
586
587 case SAMETIME_MESSAGETYPE_CHANNEL_SEND:
588 sinfo->send_type = dissect_channel_send(tvb, sametime_tree, offset);
589 break;
590
591 case SAMETIME_MESSAGETYPE_CHANNEL_ACCEPT:
592 dissect_channel_accept(tvb, sametime_tree, offset);
593 break;
594
595 case SAMETIME_MESSAGETYPE_SET_USER_STATUS:
596 sinfo->user_status = dissect_set_user_status(tvb, sametime_tree, offset);
597 break;
598
599 case SAMETIME_MESSAGETYPE_SENSE_SERVICE:
600 dissect_sense_service(tvb, sametime_tree, offset);
601 break;
602
603 default:
604 /* do not fill the statistics with useless data from encrypted packages */
605 sinfo->message_type = -1;
606 break;
607 }
608 }
609
610 tap_queue_packet(sametime_tap, pinfo, sinfo);
611 return tvb_captured_length(tvb);
612 }
613
614
615 /*
616 tick statistics
617 */
618 static tap_packet_status
619 sametime_stats_tree_packet(stats_tree* st, packet_info* pinfo _U_, epan_dissect_t* edt _U_, const void* p, tap_flags_t flags _U_)
620 {
621 const struct SametimeTap *pi = (const struct SametimeTap *)p;
622
623 tick_stat_node(st, st_str_packet, 0, false);
624 if (pi->message_type != -1)
625 stats_tree_tick_pivot(st, st_node_message_type, val_to_str(pi->message_type, messagetypenames, "Unknown (0x%04x)"));
626
627 if (pi->send_type != -1)
628 stats_tree_tick_pivot(st, st_node_send_type, val_to_str(pi->send_type, sendtypenames, "Unknown (0x%04x)"));
629
630 if (pi->user_status != -1)
631 stats_tree_tick_pivot(st, st_node_user_status, val_to_str(pi->user_status, userstatusnames, "Unknown (0x%04x)"));
632
633 return TAP_PACKET_REDRAW;
634 }
635
636
637 /*
638 init statistic
639 */
640 static void
641 sametime_stats_tree_init(stats_tree* st)
642 {
643 st_node_packet = stats_tree_create_node(st, st_str_packet, 0, STAT_DT_INT, true);
644 st_node_message_type = stats_tree_create_pivot(st, st_str_message_type, st_node_packet);
645 st_node_send_type = stats_tree_create_pivot(st, st_str_send_type, st_node_packet);
646 st_node_user_status = stats_tree_create_pivot(st, st_str_user_status, st_node_packet);
647 }
648
649
650 /*
651 length of the sametime message
652 */
653 static unsigned
654 get_sametime_message_len(packet_info *pinfo _U_, tvbuff_t *tvb,
655 int offset, void *data _U_)
656 {
657 /* XXX: Actually: the length of the tvb will always be 4 or greater at this point */
658 /* because tcp_dissect_pdus was called with 4 as a required "fixed length". */
659 /* But newer variants of this protocol with a full encrypted network stream */
660 /* may require a more sophisticated dissection logic here */
661 uint32_t N = tvb_captured_length_remaining(tvb, offset);
662
663 return (N < 4) ? N : tvb_get_ntohl(tvb, offset) + 4;
664 }
665
666
667 /*
668 the dissector itself
669 */
670 static int
671 dissect_sametime(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
672 {
673 col_set_str(pinfo->cinfo, COL_PROTOCOL, "SAMETIME");
674 col_clear(pinfo->cinfo,COL_INFO);
675
676 tcp_dissect_pdus(tvb, pinfo, tree, global_sametime_reassemble_packets, 4,
677 get_sametime_message_len, dissect_sametime_content, data);
678 return tvb_captured_length(tvb);
679 }
680
681
682 void
683 proto_register_sametime(void)
684 {
685 static hf_register_info hf[] = {
686 /*tcp payload is one byte : SAMETIME_MESSAGETYPE_HEARTBEAT*/
687 { &hf_sametime_heartbeat,
688 { "heartbeat", "sametime.heartbeat",
689 FT_UINT8, BASE_HEX,
690 NULL, 0x0,
691 NULL, HFILL }
692 },
693
694 /*sametime message header*/
695 { &hf_sametime_message_length,
696 { "msg length", "sametime.message_length",
697 FT_UINT32, BASE_DEC,
698 NULL, 0,
699 NULL, HFILL }
700 },
701 { &hf_sametime_message_type,
702 { "msg type", "sametime.message_type",
703 FT_UINT16, BASE_HEX,
704 VALS(messagetypenames), 0x0,
705 NULL, HFILL }
706 },
707 { &hf_sametime_message_options,
708 { "msg options", "sametime.message_options",
709 FT_UINT16, BASE_HEX,
710 VALS(optionnames), 0x0,
711 NULL, HFILL }
712 },
713 { &hf_sametime_message_options_encrypted,
714 { "ENCRYPT", "sametime.message_options.encrypted",
715 FT_BOOLEAN, 16,
716 NULL, SAMETIME_MESSAGEOPTION_ENCRYPT,
717 NULL, HFILL }
718 },
719 { &hf_sametime_message_options_attribute,
720 { "HAS_ATTRIBS", "sametime.message_options.attribute",
721 FT_BOOLEAN, 16,
722 NULL, SAMETIME_MESSAGEOPTION_HAS_ATTRIBS,
723 NULL, HFILL }
724 },
725 { &hf_sametime_message_channel,
726 { "msg channel", "sametime.message_channel",
727 FT_UINT32, BASE_DEC,
728 NULL, 0,
729 NULL, HFILL }
730 },
731
732 /*common fields within various message types*/
733 { &hf_sametime_field_length,
734 { "length", "sametime.field_length",
735 FT_UINT16, BASE_DEC,
736 NULL, 0,
737 NULL, HFILL }
738 },
739 { &hf_sametime_field_text,
740 { "text", "sametime.field_text",
741 FT_STRING, BASE_NONE,
742 NULL, 0x0,
743 NULL, HFILL }
744 },
745 { &hf_sametime_code,
746 { "code", "sametime.code",
747 FT_UINT32, BASE_HEX,
748 VALS(codenames), 0x0,
749 NULL, HFILL }
750 },
751 { &hf_sametime_login_type,
752 { "login type", "sametime.login_type",
753 FT_UINT16, BASE_HEX,
754 NULL, 0x0,
755 NULL, HFILL }
756 },
757 { &hf_sametime_time,
758 { "time", "sametime.time",
759 FT_UINT32, BASE_DEC,
760 NULL, 0,
761 NULL, HFILL }
762 },
763
764 /*type handshake*/
765 { &hf_sametime_handshake_major,
766 { "major", "sametime.handshake.major",
767 FT_UINT16, BASE_HEX,
768 NULL, 0x0,
769 NULL, HFILL }
770 },
771 { &hf_sametime_handshake_minor,
772 { "minor", "sametime.handshake.minor",
773 FT_UINT16, BASE_HEX,
774 NULL, 0x0,
775 NULL, HFILL }
776 },
777 { &hf_sametime_handshake_srvrcalc_addr,
778 { "srvr", "sametime.handshake.srvrcalc_addr",
779 FT_IPv4, BASE_NONE,
780 NULL, 0x0,
781 NULL, HFILL }
782 },
783 { &hf_sametime_handshake_loclcalc_addr,
784 { "locl", "sametime.handshake.loclcalc_addr",
785 FT_IPv4, BASE_NONE,
786 NULL, 0x0,
787 NULL, HFILL }
788 },
789
790 /*type channel*/
791 { &hf_sametime_channel_service,
792 { "service id", "sametime.channel.service",
793 FT_UINT32, BASE_DEC,
794 NULL, 0,
795 NULL, HFILL }
796 },
797 { &hf_sametime_channel_id,
798 { "channel id", "sametime.channel.id",
799 FT_UINT32, BASE_DEC,
800 NULL, 0,
801 NULL, HFILL }
802 },
803 { &hf_sametime_channel_send_type,
804 { "send type", "sametime.channel.send_type",
805 FT_UINT16, BASE_HEX,
806 VALS(sendtypenames), 0,
807 NULL, HFILL }
808 },
809 { &hf_sametime_channel_awareness,
810 { "awareness", "sametime.channel.awareness",
811 FT_UINT16, BASE_HEX,
812 VALS(awarenessnames), 0x0,
813 NULL, HFILL }
814 },
815
816 /*type user status*/
817 { &hf_sametime_user_status,
818 { "user status", "sametime.user_status_type",
819 FT_UINT16, BASE_HEX,
820 VALS(userstatusnames), 0x0,
821 NULL, HFILL }
822 },
823
824 /*type location*/
825 { &hf_sametime_location_name,
826 { "name", "sametime.location.name",
827 FT_STRING, BASE_NONE,
828 NULL, 0x0,
829 NULL, HFILL }
830 },
831 { &hf_sametime_location_city,
832 { "city", "sametime.location.city",
833 FT_STRING, BASE_NONE,
834 NULL, 0x0,
835 NULL, HFILL }
836 },
837 { &hf_sametime_location_province,
838 { "province", "sametime.location.province",
839 FT_STRING, BASE_NONE,
840 NULL, 0x0,
841 NULL, HFILL }
842 },
843 { &hf_sametime_location_postalcode,
844 { "postal code", "sametime.location.postalcode",
845 FT_STRING, BASE_NONE,
846 NULL, 0x0,
847 NULL, HFILL }
848 },
849 { &hf_sametime_location_country,
850 { "country", "sametime.location.country",
851 FT_STRING, BASE_NONE,
852 NULL, 0x0,
853 NULL, HFILL }
854 },
855 { &hf_sametime_location_phone,
856 { "phone", "sametime.location.phone",
857 FT_STRING, BASE_NONE,
858 NULL, 0x0,
859 NULL, HFILL }
860 },
861 { &hf_sametime_location_timezone,
862 { "time zone", "sametime.location.timezone",
863 FT_STRING, BASE_NONE,
864 NULL, 0x0,
865 NULL, HFILL }
866 },
867 };
868
869 static int *ett[] = {
870 &ett_sametime,
871 &ett_sametime_options
872 };
873
874 module_t *sametime_module;
875
876 proto_sametime = proto_register_protocol ("Sametime Protocol", "SAMETIME", "sametime");
877 proto_register_field_array(proto_sametime, hf, array_length(hf));
878 proto_register_subtree_array(ett, array_length(ett));
879
880 sametime_handle = register_dissector("sametime", dissect_sametime, proto_sametime);
881
882 sametime_tap = register_tap("sametime");
883
884 /* Preference setting */
885 sametime_module = prefs_register_protocol(proto_sametime, NULL);
886 prefs_register_bool_preference(sametime_module, "show_length",
887 "Show length",
888 "Show length of text field",
889 &global_sametime_show_length);
890 prefs_register_bool_preference(sametime_module, "reassemble",
891 "Reassemble","reassemble packets",
892 &global_sametime_reassemble_packets);
893 }
894
895
896 /*
897 create / register
898 */
899 void
900 proto_reg_handoff_sametime(void)
901 {
902 dissector_add_uint_with_preference("tcp.port", DEFAULT_SAMETIME_PORT, sametime_handle);
903
904 stats_tree_register("sametime", "sametime", "Sametime" STATS_TREE_MENU_SEPARATOR "Messages", 0,
905 sametime_stats_tree_packet,
906 sametime_stats_tree_init, NULL );
907
908 }
909
910
911 /*
912 * Editor modelines - https://www.wireshark.org/tools/modelines.html
913 *
914 * Local variables:
915 * c-basic-offset: 4
916 * tab-width: 8
917 * indent-tabs-mode: nil
918 * End:
919 *
920 * vi: set shiftwidth=4 tabstop=8 expandtab:
921 * :indentSize=4:tabSize=8:noTabs=true:
922 */
Metzes wireshark repo