2 * Routines for Yahoo Messenger YMSG protocol packet version 13 dissection
3 * Copyright 2003, Wayne Parrott <wayne_p@pacific.net.au>
4 * Copied from packet-yhoo.c and updated
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
35 #include <epan/packet.h>
37 #include "packet-tcp.h"
38 #include <epan/prefs.h>
40 static int proto_ymsg = -1;
41 static int hf_ymsg_version = -1;
42 static int hf_ymsg_len = -1;
43 static int hf_ymsg_service = -1;
44 static int hf_ymsg_status = -1;
45 static int hf_ymsg_session_id = -1;
47 static int hf_ymsg_content = -1;
48 static int hf_ymsg_content_line = -1;
49 static int hf_ymsg_content_line_key = -1;
50 static int hf_ymsg_content_line_value = -1;
52 static gint ett_ymsg = -1;
53 static gint ett_ymsg_content = -1;
54 static gint ett_ymsg_content_line = -1;
56 #define TCP_PORT_YMSG 23 /* XXX - this is Telnet! */
57 #define TCP_PORT_YMSG_2 25 /* And this is SMTP! */
58 #define TCP_PORT_YMSG_3 5050 /* This, however, is regular Yahoo Messenger */
60 /* desegmentation of YMSG over TCP */
61 static gboolean ymsg_desegment = TRUE;
64 * This is from yahoolib2.c from libyahoo2.
68 * http://libyahoo2.sourceforge.net/ymsg-9.txt
72 * http://www.venkydude.com/articles/yahoo.htm
76 * http://www.cse.iitb.ac.in/~varunk/YahooProtocol.htm
80 * http://www.geocrawler.com/archives/3/4893/2002/1/0/7459037/
84 * http://www.geocities.com/ziggycubbe/ym.html
87 /* Service constants */
88 enum yahoo_service { /* these are easier to see in hex */
89 YAHOO_SERVICE_LOGON = 1,
93 YAHOO_SERVICE_IDLE, /* 5 (placemarker) */
94 YAHOO_SERVICE_MESSAGE,
96 YAHOO_SERVICE_IDDEACT,
97 YAHOO_SERVICE_MAILSTAT,
98 YAHOO_SERVICE_USERSTAT, /* 0xa */
99 YAHOO_SERVICE_NEWMAIL,
100 YAHOO_SERVICE_CHATINVITE,
101 YAHOO_SERVICE_CALENDAR,
102 YAHOO_SERVICE_NEWPERSONALMAIL,
103 YAHOO_SERVICE_NEWCONTACT,
104 YAHOO_SERVICE_ADDIDENT, /* 0x10 */
105 YAHOO_SERVICE_ADDIGNORE,
107 YAHOO_SERVICE_GOTGROUPRENAME, /* < 1, 36(old), 37(new) */
108 YAHOO_SERVICE_SYSMESSAGE = 0x14,
109 YAHOO_SERVICE_SKINNAME = 0x15,
110 YAHOO_SERVICE_PASSTHROUGH2 = 0x16,
111 YAHOO_SERVICE_CONFINVITE = 0x18,
112 YAHOO_SERVICE_CONFLOGON,
113 YAHOO_SERVICE_CONFDECLINE,
114 YAHOO_SERVICE_CONFLOGOFF,
115 YAHOO_SERVICE_CONFADDINVITE,
116 YAHOO_SERVICE_CONFMSG,
117 YAHOO_SERVICE_CHATLOGON,
118 YAHOO_SERVICE_CHATLOGOFF,
119 YAHOO_SERVICE_CHATMSG = 0x20,
120 YAHOO_SERVICE_GAMELOGON = 0x28,
121 YAHOO_SERVICE_GAMELOGOFF,
122 YAHOO_SERVICE_GAMEMSG = 0x2a,
123 YAHOO_SERVICE_FILETRANSFER = 0x46,
124 YAHOO_SERVICE_VOICECHAT = 0x4A,
125 YAHOO_SERVICE_NOTIFY,
126 YAHOO_SERVICE_VERIFY,
127 YAHOO_SERVICE_P2PFILEXFER,
128 YAHOO_SERVICE_PEERTOPEER = 0x4F, /* Checks if P2P possible */
129 YAHOO_SERVICE_WEBCAM,
130 YAHOO_SERVICE_AUTHRESP = 0x54,
132 YAHOO_SERVICE_AUTH = 0x57,
133 YAHOO_SERVICE_ADDBUDDY = 0x83,
134 YAHOO_SERVICE_REMBUDDY,
135 YAHOO_SERVICE_IGNORECONTACT, /* > 1, 7, 13 < 1, 66, 13, 0*/
136 YAHOO_SERVICE_REJECTCONTACT,
137 YAHOO_SERVICE_GROUPRENAME = 0x89, /* > 1, 65(new), 66(0), 67(old) */
138 YAHOO_SERVICE_CHATONLINE = 0x96, /* > 109(id), 1, 6(abcde) < 0,1*/
139 YAHOO_SERVICE_CHATGOTO,
140 YAHOO_SERVICE_CHATJOIN, /* > 1 104-room 129-1600326591 62-2 */
141 YAHOO_SERVICE_CHATLEAVE,
142 YAHOO_SERVICE_CHATEXIT = 0x9b,
143 YAHOO_SERVICE_CHATADDINVITE = 0x9d,
144 YAHOO_SERVICE_CHATLOGOUT = 0xa0,
145 YAHOO_SERVICE_CHATPING,
146 YAHOO_SERVICE_COMMENT = 0xa8,
147 YAHOO_SERVICE_GAME_INVITE = 0xb7,
148 YAHOO_SERVICE_STEALTH_PERM = 0xb9,
149 YAHOO_SERVICE_STEALTH_SESSION = 0xba,
150 YAHOO_SERVICE_AVATAR = 0xbc,
151 YAHOO_SERVICE_PICTURE_CHECKSUM = 0xbd,
152 YAHOO_SERVICE_PICTURE = 0xbe,
153 YAHOO_SERVICE_PICTURE_UPDATE = 0xc1,
154 YAHOO_SERVICE_PICTURE_UPLOAD = 0xc2,
155 YAHOO_SERVICE_YAB_UPDATE = 0xc4,
156 YAHOO_SERVICE_Y6_VISIBLE_TOGGLE = 0xc5, /* YMSG13, key 13: 2 = invisible, 1 = visible */
157 YAHOO_SERVICE_Y6_STATUS_UPDATE = 0xc6, /* YMSG13 */
158 YAHOO_SERVICE_PICTURE_STATUS = 0xc7, /* YMSG13, key 213: 0 = none, 1 = avatar, 2 = picture */
159 YAHOO_SERVICE_VERIFY_ID_EXISTS = 0xc8,
160 YAHOO_SERVICE_AUDIBLE = 0xd0,
161 YAHOO_SERVICE_Y7_PHOTO_SHARING = 0xd2,
162 YAHOO_SERVICE_Y7_CONTACT_DETAILS = 0xd3,/* YMSG13 */
163 YAHOO_SERVICE_Y7_CHAT_SESSION = 0xd4,
164 YAHOO_SERVICE_Y7_AUTHORIZATION = 0xd6, /* YMSG13 */
165 YAHOO_SERVICE_Y7_FILETRANSFER = 0xdc, /* YMSG13 */
166 YAHOO_SERVICE_Y7_FILETRANSFERINFO, /* YMSG13 */
167 YAHOO_SERVICE_Y7_FILETRANSFERACCEPT, /* YMSG13 */
168 YAHOO_SERVICE_Y7_MINGLE = 0xe1, /* YMSG13 */
169 YAHOO_SERVICE_Y7_CHANGE_GROUP = 0xe7, /* YMSG13 */
170 YAHOO_SERVICE_WEBLOGIN = 0x0226,
171 YAHOO_SERVICE_SMS_MSG = 0x02ea
176 YAHOO_STATUS_AVAILABLE = 0,
179 YAHOO_STATUS_NOTATHOME,
180 YAHOO_STATUS_NOTATDESK,
181 YAHOO_STATUS_NOTINOFFICE,
182 YAHOO_STATUS_ONPHONE,
183 YAHOO_STATUS_ONVACATION,
184 YAHOO_STATUS_OUTTOLUNCH,
185 YAHOO_STATUS_STEPPEDOUT,
186 YAHOO_STATUS_INVISIBLE = 12,
187 YAHOO_STATUS_CUSTOM = 99,
188 YAHOO_STATUS_IDLE = 999,
189 YAHOO_STATUS_WEBLOGIN = 0x5a55aa55,
190 YAHOO_STATUS_OFFLINE = 0x5a55aa56, /* don't ask */
191 YAHOO_STATUS_TYPING = 0x16
194 enum ypacket_status {
195 YPACKET_STATUS_DISCONNECTED = -1,
196 YPACKET_STATUS_DEFAULT = 0,
197 YPACKET_STATUS_SERVERACK = 1,
198 YPACKET_STATUS_GAME = 0x2,
199 YPACKET_STATUS_AWAY = 0x4,
200 YPACKET_STATUS_CONTINUED = 0x5,
201 YPACKET_STATUS_INVISIBLE = 12,
202 YPACKET_STATUS_NOTIFY = 0x16, /* TYPING */
203 YPACKET_STATUS_WEBLOGIN = 0x5a55aa55,
204 YPACKET_STATUS_OFFLINE = 0x5a55aa56
207 struct yahoo_rawpacket
209 char ymsg[4]; /* Packet identification string (YMSG) */
210 unsigned char version[4]; /* 4 bytes, little endian? */
211 unsigned char len[2]; /* length - little endian */
212 unsigned char service[2]; /* service - little endian */
213 unsigned char status[4]; /* Status - online, away etc.*/
214 unsigned char session_id[4]; /* Session ID */
215 char content[6]; /* 6 is the minimum size of the content */
218 static const value_string ymsg_service_vals[] = {
219 {YAHOO_SERVICE_LOGON, "Pager Logon"},
220 {YAHOO_SERVICE_LOGOFF, "Pager Logoff"},
221 {YAHOO_SERVICE_ISAWAY, "Is Away"},
222 {YAHOO_SERVICE_ISBACK, "Is Back"},
223 {YAHOO_SERVICE_IDLE, "Idle"},
224 {YAHOO_SERVICE_MESSAGE, "Message"},
225 {YAHOO_SERVICE_IDACT, "Activate Identity"},
226 {YAHOO_SERVICE_IDDEACT, "Deactivate Identity"},
227 {YAHOO_SERVICE_MAILSTAT, "Mail Status"},
228 {YAHOO_SERVICE_USERSTAT, "User Status"},
229 {YAHOO_SERVICE_NEWMAIL, "New Mail"},
230 {YAHOO_SERVICE_CHATINVITE, "Chat Invitation"},
231 {YAHOO_SERVICE_CALENDAR, "Calendar Reminder"},
232 {YAHOO_SERVICE_NEWPERSONALMAIL, "New Personals Mail"},
233 {YAHOO_SERVICE_NEWCONTACT, "New Friend"},
234 {YAHOO_SERVICE_ADDIDENT, "Add Identity"},
235 {YAHOO_SERVICE_ADDIGNORE, "Add Ignore"},
236 {YAHOO_SERVICE_PING, "Ping"},
237 {YAHOO_SERVICE_GOTGROUPRENAME, "Got Group Rename"},
238 {YAHOO_SERVICE_SYSMESSAGE, "System Message"},
239 {YAHOO_SERVICE_SKINNAME, "Skinname"},
240 {YAHOO_SERVICE_PASSTHROUGH2, "Passthrough 2"},
241 {YAHOO_SERVICE_CONFINVITE, "Conference Invitation"},
242 {YAHOO_SERVICE_CONFLOGON, "Conference Logon"},
243 {YAHOO_SERVICE_CONFDECLINE, "Conference Decline"},
244 {YAHOO_SERVICE_CONFLOGOFF, "Conference Logoff"},
245 {YAHOO_SERVICE_CONFADDINVITE, "Conference Additional Invitation"},
246 {YAHOO_SERVICE_CONFMSG, "Conference Message"},
247 {YAHOO_SERVICE_CHATLOGON, "Chat Logon"},
248 {YAHOO_SERVICE_CHATLOGOFF, "Chat Logoff"},
249 {YAHOO_SERVICE_CHATMSG, "Chat Message"},
250 {YAHOO_SERVICE_GAMELOGON, "Game Logon"},
251 {YAHOO_SERVICE_GAMELOGOFF, "Game Logoff"},
252 {YAHOO_SERVICE_GAMEMSG, "Game Message"},
253 {YAHOO_SERVICE_FILETRANSFER, "File Transfer"},
254 {YAHOO_SERVICE_VOICECHAT, "Voice Chat"},
255 {YAHOO_SERVICE_NOTIFY, "Notify"},
256 {YAHOO_SERVICE_VERIFY, "Verify"},
257 {YAHOO_SERVICE_P2PFILEXFER, "P2P File Transfer"},
258 {YAHOO_SERVICE_PEERTOPEER, "Peer To Peer"},
259 {YAHOO_SERVICE_WEBCAM, "WebCam"},
260 {YAHOO_SERVICE_AUTHRESP, "Authentication Response"},
261 {YAHOO_SERVICE_LIST, "List"},
262 {YAHOO_SERVICE_AUTH, "Authentication"},
263 {YAHOO_SERVICE_ADDBUDDY, "Add Buddy"},
264 {YAHOO_SERVICE_REMBUDDY, "Remove Buddy"},
265 {YAHOO_SERVICE_IGNORECONTACT, "Ignore Contact"},
266 {YAHOO_SERVICE_REJECTCONTACT, "Reject Contact"},
267 {YAHOO_SERVICE_GROUPRENAME, "Group Rename"},
268 {YAHOO_SERVICE_CHATONLINE, "Chat Online"},
269 {YAHOO_SERVICE_CHATGOTO, "Chat Goto"},
270 {YAHOO_SERVICE_CHATJOIN, "Chat Join"},
271 {YAHOO_SERVICE_CHATLEAVE, "Chat Leave"},
272 {YAHOO_SERVICE_CHATEXIT, "Chat Exit"},
273 {YAHOO_SERVICE_CHATADDINVITE, "Chat Invite"},
274 {YAHOO_SERVICE_CHATLOGOUT, "Chat Logout"},
275 {YAHOO_SERVICE_CHATPING, "Chat Ping"},
276 {YAHOO_SERVICE_COMMENT, "Comment"},
277 {YAHOO_SERVICE_GAME_INVITE,"Game Invite"},
278 {YAHOO_SERVICE_STEALTH_PERM, "Stealth Permanent"},
279 {YAHOO_SERVICE_STEALTH_SESSION, "Stealth Session"},
280 {YAHOO_SERVICE_AVATAR,"Avatar"},
281 {YAHOO_SERVICE_PICTURE_CHECKSUM,"Picture Checksum"},
282 {YAHOO_SERVICE_PICTURE,"Picture"},
283 {YAHOO_SERVICE_PICTURE_UPDATE,"Picture Update"},
284 {YAHOO_SERVICE_PICTURE_UPLOAD,"Picture Upload"},
285 {YAHOO_SERVICE_YAB_UPDATE,"Yahoo Address Book Update"},
286 {YAHOO_SERVICE_Y6_VISIBLE_TOGGLE, "Y6 Visibility Toggle"},
287 {YAHOO_SERVICE_Y6_STATUS_UPDATE, "Y6 Status Update"},
288 {YAHOO_SERVICE_PICTURE_STATUS, "Picture Sharing Status"},
289 {YAHOO_SERVICE_VERIFY_ID_EXISTS, "Verify ID Exists"},
290 {YAHOO_SERVICE_AUDIBLE, "Audible"},
291 {YAHOO_SERVICE_Y7_CONTACT_DETAILS,"Y7 Contact Details"},
292 {YAHOO_SERVICE_Y7_CHAT_SESSION, "Y7 Chat Session"},
293 {YAHOO_SERVICE_Y7_AUTHORIZATION,"Y7 Buddy Authorization"},
294 {YAHOO_SERVICE_Y7_FILETRANSFER,"Y7 File Transfer"},
295 {YAHOO_SERVICE_Y7_FILETRANSFERINFO,"Y7 File Transfer Information"},
296 {YAHOO_SERVICE_Y7_FILETRANSFERACCEPT,"Y7 File Transfer Accept"},
297 {YAHOO_SERVICE_Y7_CHANGE_GROUP, "Y7 Change Group"},
298 {YAHOO_SERVICE_WEBLOGIN,"WebLogin"},
299 {YAHOO_SERVICE_SMS_MSG,"SMS Message"},
303 static const value_string ymsg_status_vals[] = {
304 {YPACKET_STATUS_DISCONNECTED,"Disconnected"},
305 {YPACKET_STATUS_DEFAULT,"Default"},
306 {YPACKET_STATUS_SERVERACK,"Server Ack"},
307 {YPACKET_STATUS_GAME,"Playing Game"},
308 {YPACKET_STATUS_AWAY, "Away"},
309 {YPACKET_STATUS_CONTINUED,"More Packets??"},
310 {YPACKET_STATUS_NOTIFY, "Notify"},
311 {YPACKET_STATUS_WEBLOGIN,"Web Login"},
312 {YPACKET_STATUS_OFFLINE,"Offline"},
316 static guint get_ymsg_pdu_len(packet_info *pinfo, tvbuff_t *tvb, int offset);
317 static void dissect_ymsg_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
319 /* Find the end of the current content line and return its length */
320 static int get_content_item_length(tvbuff_t *tvb, int offset)
322 int origoffset = offset;
324 /* Keep reading until the magic delimiter (or end of tvb) is found */
325 while (tvb_length_remaining(tvb, offset) >= 2) {
326 if (tvb_get_ntohs(tvb, offset) == 0xc080) {
331 return offset - origoffset;
336 dissect_ymsg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
339 if (tvb_memeql(tvb, 0, "YMSG", 4) == -1) {
340 /* Not a Yahoo Messenger packet. */
344 tcp_dissect_pdus(tvb, pinfo, tree, ymsg_desegment, 8, get_ymsg_pdu_len,
350 get_ymsg_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
355 * Get the length of the YMSG packet.
357 plen = tvb_get_ntohs(tvb, offset + 8);
360 * That length doesn't include the length of the header itself; add that in.
366 dissect_ymsg_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
368 proto_tree *ymsg_tree, *ti;
369 proto_item *content_item;
370 proto_tree *content_tree;
373 int headersize = sizeof(struct yahoo_rawpacket)-6;
379 if (check_col(pinfo->cinfo, COL_PROTOCOL))
380 col_set_str(pinfo->cinfo, COL_PROTOCOL, "YMSG");
383 if (check_col(pinfo->cinfo, COL_INFO)) {
384 col_add_fstr(pinfo->cinfo, COL_INFO,
386 val_to_str(tvb_get_ntohs(tvb, offset + 10),
387 ymsg_service_vals, "Unknown Service: %u"),
388 val_to_str(tvb_get_ntohl(tvb, offset + 12),
389 ymsg_status_vals, "Unknown Status: %u")
394 ti = proto_tree_add_item(tree, proto_ymsg, tvb, offset, -1, FALSE);
395 ymsg_tree = proto_item_add_subtree(ti, ett_ymsg);
397 offset += 4; /* skip the YMSG string */
400 proto_tree_add_item(ymsg_tree, hf_ymsg_version, tvb, offset, 2, FALSE);
403 offset += 2; /* XXX - padding? */
406 content_len = tvb_get_ntohs(tvb, offset);
407 proto_tree_add_item(ymsg_tree, hf_ymsg_len, tvb, offset, 2, FALSE);
411 proto_item_append_text(ti, " (%s)",
412 val_to_str(tvb_get_ntohs(tvb, offset),
416 proto_tree_add_item(ymsg_tree, hf_ymsg_service, tvb, offset, 2, FALSE);
420 proto_tree_add_item(ymsg_tree, hf_ymsg_status, tvb, offset, 4, FALSE);
424 proto_tree_add_item(ymsg_tree, hf_ymsg_session_id, tvb, offset, 4, TRUE);
429 /* Create content subtree */
430 content_item = proto_tree_add_item(ymsg_tree, hf_ymsg_content, tvb,
432 content_tree = proto_item_add_subtree(content_item, ett_ymsg_content);
434 /* Each entry consists of:
435 <key string> <delimiter> <value string> <delimiter>
438 /* Parse and show each line of the contents */
441 proto_item *ti = NULL;
442 proto_tree *content_line_tree = NULL;
444 /* Don't continue unless there is room for another whole item.
445 (including 2 2-byte delimiters */
446 if (offset >= (headersize+content_len-4))
451 /* Get the length of the key */
452 keylen = get_content_item_length(tvb, offset);
453 /* Extract the key */
454 keybuf = tvb_format_text(tvb, offset, keylen);
456 /* Get the length of the value */
457 vallen = get_content_item_length(tvb, offset+keylen+2);
458 /* Extract the value */
459 valbuf = tvb_format_text(tvb, offset+keylen+2, vallen);
461 /* Add a text item with the key... */
462 ti = proto_tree_add_string_format(content_tree, hf_ymsg_content_line, tvb,
463 offset, keylen+2+vallen+2,
464 "", "%s:%s", keybuf, valbuf);
465 content_line_tree = proto_item_add_subtree(ti, ett_ymsg_content_line);
467 /* And add the key and value separately inside */
468 proto_tree_add_item(content_line_tree, hf_ymsg_content_line_key, tvb,
469 offset, keylen, FALSE);
470 proto_tree_add_item(content_line_tree, hf_ymsg_content_line_value, tvb,
471 offset+keylen+2, vallen, FALSE);
473 /* Move beyone key and value lines */
474 offset += keylen+2+vallen+2;
479 col_set_fence(pinfo->cinfo, COL_INFO);
485 proto_register_ymsg(void)
487 static hf_register_info hf[] = {
488 { &hf_ymsg_version, {
489 "Version", "ymsg.version", FT_UINT16, BASE_DEC,
490 NULL, 0, "Packet version identifier", HFILL }},
492 "Packet Length", "ymsg.len", FT_UINT16, BASE_DEC,
493 NULL, 0, "Packet Length", HFILL }},
494 { &hf_ymsg_service, {
495 "Service", "ymsg.service", FT_UINT16, BASE_DEC,
496 VALS(ymsg_service_vals), 0, "Service Type", HFILL }},
498 "Status", "ymsg.status", FT_UINT32, BASE_DEC,
499 VALS(ymsg_status_vals), 0, "Message Type Flags", HFILL }},
500 { &hf_ymsg_session_id, {
501 "Session ID", "ymsg.session_id", FT_UINT32, BASE_HEX,
502 NULL, 0, "Connection ID", HFILL }},
504 { &hf_ymsg_content, {
505 "Content", "ymsg.content", FT_STRING, BASE_NONE,
506 NULL, 0, "Data portion of the packet", HFILL }},
507 { &hf_ymsg_content_line, {
508 "Content-line", "ymsg.content-line", FT_STRING, BASE_NONE,
509 NULL, 0, "Data portion of the packet", HFILL }},
510 { &hf_ymsg_content_line_key, {
511 "Key", "ymsg.content-line.key", FT_STRING, BASE_NONE,
512 NULL, 0, "Content line key", HFILL }},
513 { &hf_ymsg_content_line_value, {
514 "Value", "ymsg.content-line.value", FT_STRING, BASE_NONE,
515 NULL, 0, "Content line value", HFILL }}
517 static gint *ett[] = {
520 &ett_ymsg_content_line
522 module_t *ymsg_module;
524 proto_ymsg = proto_register_protocol("Yahoo YMSG Messenger Protocol",
527 proto_register_field_array(proto_ymsg, hf, array_length(hf));
529 proto_register_subtree_array(ett, array_length(ett));
531 ymsg_module = prefs_register_protocol(proto_ymsg, NULL);
532 prefs_register_bool_preference(ymsg_module, "desegment",
533 "Reassemble YMSG messages spanning multiple TCP segments",
534 "Whether the YMSG dissector should reassemble messages spanning multiple TCP segments. "
535 "To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
540 proto_reg_handoff_ymsg(void)
543 * DO NOT register for port 23, as that's Telnet, or for port
544 * 25, as that's SMTP.
546 * Also, DO NOT register for port 5050, as that's used by the
547 * old and new Yahoo messenger protocols.
549 * Just register as a heuristic TCP dissector, and reject stuff
550 * that doesn't begin with a YMSG signature.
552 heur_dissector_add("tcp", dissect_ymsg, proto_ymsg);