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conference.c @ e9eee04

Last change on this file since e9eee04 was 49108f3, checked in by dequis <dx@…>, at 2017-11-20T00:51:16Z

jabber: Fix chat joins when ext_jid is provided for your own user

This is the presence needed to finalize a join to the channel, the
'from' field is our own user in the context of that channel:

<presence to="dx@server/resource" from="channel@…/dx">

<x xmlns="http://jabber.org/protocol/muc#user">

<status code="110"/>
<item jid="~dx@198.51.100.1" affiliation="none" role="participant"/>

</x>

</presence>

Bitlbee takes the stuff to <item jid="..."> as the "real" jid, as it
does for non-anonymous MUCs. It sets that to ext_jid, and uses it as the
handle internally.

In this particular case, that real jid is nonsense for us, so
imcb_chat_add_buddy() interprets that as yet another person joining the
channel, instead of the expected self-join.

This fixes it by checking if the buddy is our own user, and ignoring the
provided ext_jid in those cases.

Thanks to ivucica for reporting this, who was using Biboumi (a gateway
from XMPP to IRC)

Property mode set to 100644

File size: 15.0 KB

Line
1	/***************************************************************************\
2	* *
3	* BitlBee - An IRC to IM gateway *
4	* Jabber module - Conference rooms *
5	* *
6	* Copyright 2007-2012 Wilmer van der Gaast <wilmer@gaast.net> *
7	* *
8	* This program is free software; you can redistribute it and/or modify *
9	* it under the terms of the GNU General Public License as published by *
10	* the Free Software Foundation; either version 2 of the License, or *
11	* (at your option) any later version. *
12	* *
13	* This program is distributed in the hope that it will be useful, *
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16	* GNU General Public License for more details. *
17	* *
18	* You should have received a copy of the GNU General Public License along *
19	* with this program; if not, write to the Free Software Foundation, Inc., *
20	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
21	* *
22	\***************************************************************************/
23
24	#include "jabber.h"
25	#include "sha1.h"
26
27	static xt_status jabber_chat_join_failed(struct im_connection ic, struct xt_node node, struct xt_node *orig);
28	static xt_status jabber_chat_self_message(struct im_connection ic, struct xt_node node, struct xt_node *orig);
29
30	struct groupchat jabber_chat_join(struct im_connection ic, const char room, const char nick, const char *password,
31	gboolean always_use_nicks)
32	{
33	struct jabber_chat *jc;
34	struct xt_node *node;
35	struct groupchat *c;
36	char *roomjid;
37
38	roomjid = g_strdup_printf("%s/%s", room, nick);
39	node = xt_new_node("x", NULL, NULL);
40	xt_add_attr(node, "xmlns", XMLNS_MUC);
41	if (password) {
42	xt_add_child(node, xt_new_node("password", password, NULL));
43	}
44	node = jabber_make_packet("presence", NULL, roomjid, node);
45	jabber_cache_add(ic, node, jabber_chat_join_failed);
46
47	if (!jabber_write_packet(ic, node)) {
48	g_free(roomjid);
49	return NULL;
50	}
51
52	jc = g_new0(struct jabber_chat, 1);
53	jc->name = jabber_normalize(room);
54
55	if ((jc->me = jabber_buddy_add(ic, roomjid)) == NULL) {
56	g_free(roomjid);
57	g_free(jc->name);
58	g_free(jc);
59	return NULL;
60	}
61
62	if (always_use_nicks) {
63	jc->flags = JCFLAG_ALWAYS_USE_NICKS;
64	}
65
66	/* roomjid isn't normalized yet, and we need an original version
67	of the nick to send a proper presence update. */
68	jc->my_full_jid = roomjid;
69
70	c = imcb_chat_new(ic, room);
71	c->data = jc;
72
73	return c;
74	}
75
76	struct groupchat jabber_chat_with(struct im_connection ic, char *who)
77	{
78	struct jabber_data *jd = ic->proto_data;
79	struct jabber_chat *jc;
80	struct groupchat *c;
81	sha1_state_t sum;
82	double now = gettime();
83	char uuid, rjid, *cserv;
84
85	sha1_init(&sum);
86	sha1_append(&sum, (uint8_t *) ic->acc->user, strlen(ic->acc->user));
87	sha1_append(&sum, (uint8_t *) &now, sizeof(now));
88	sha1_append(&sum, (uint8_t *) who, strlen(who));
89	uuid = sha1_random_uuid(&sum);
90
91	if (jd->flags & JFLAG_GTALK) {
92	cserv = g_strdup("groupchat.google.com");
93	} else {
94	/* Guess... */
95	cserv = g_strdup_printf("conference.%s", jd->server);
96	}
97
98	rjid = g_strdup_printf("private-chat-%s@%s", uuid, cserv);
99	g_free(uuid);
100	g_free(cserv);
101
102	c = jabber_chat_join(ic, rjid, jd->username, NULL, FALSE);
103	g_free(rjid);
104	if (c == NULL) {
105	return NULL;
106	}
107
108	jc = c->data;
109	jc->invite = g_strdup(who);
110
111	return c;
112	}
113
114	static xt_status jabber_chat_join_failed(struct im_connection ic, struct xt_node node, struct xt_node *orig)
115	{
116	struct jabber_error *err;
117	struct jabber_buddy *bud;
118	char *room;
119
120	room = xt_find_attr(orig, "to");
121	bud = jabber_buddy_by_jid(ic, room, 0);
122	err = jabber_error_parse(xt_find_node(node->children, "error"), XMLNS_STANZA_ERROR);
123	if (err) {
124	imcb_error(ic, "Error joining groupchat %s: %s%s%s", room, err->code,
125	err->text ? ": " : "", err->text ? err->text : "");
126	jabber_error_free(err);
127	}
128	if (bud) {
129	struct groupchat *c = jabber_chat_by_jid(ic, bud->bare_jid);
130	if (c) {
131	jabber_chat_free(c);
132	}
133	}
134
135	return XT_HANDLED;
136	}
137
138	static xt_status jabber_chat_self_message(struct im_connection ic, struct xt_node node, struct xt_node *orig)
139	{
140	/* This is a self message sent by this bitlbee - just drop it */
141	return XT_ABORT;
142	}
143
144	struct groupchat jabber_chat_by_jid(struct im_connection ic, const char *name)
145	{
146	char *normalized = jabber_normalize(name);
147	GSList *l;
148	struct groupchat *ret;
149	struct jabber_chat *jc;
150
151	for (l = ic->groupchats; l; l = l->next) {
152	ret = l->data;
153	jc = ret->data;
154	if (strcmp(normalized, jc->name) == 0) {
155	break;
156	}
157	}
158	g_free(normalized);
159
160	return l ? ret : NULL;
161	}
162
163	void jabber_chat_free(struct groupchat *c)
164	{
165	struct jabber_chat *jc = c->data;
166
167	jabber_buddy_remove_bare(c->ic, jc->name);
168
169	g_free(jc->last_sent_message);
170	g_free(jc->my_full_jid);
171	g_free(jc->name);
172	g_free(jc->invite);
173	g_free(jc);
174
175	imcb_chat_free(c);
176	}
177
178	int jabber_chat_msg(struct groupchat c, char message, int flags)
179	{
180	struct im_connection *ic = c->ic;
181	struct jabber_chat *jc = c->data;
182	struct xt_node *node;
183
184	jc->flags \|= JCFLAG_MESSAGE_SENT;
185
186	node = xt_new_node("body", message, NULL);
187	node = jabber_make_packet("message", "groupchat", jc->name, node);
188
189	jabber_cache_add(ic, node, jabber_chat_self_message);
190
191	g_free(jc->last_sent_message);
192	jc->last_sent_message = g_strdup(message);
193
194	return !jabber_write_packet(ic, node);
195	}
196
197	int jabber_chat_topic(struct groupchat c, char topic)
198	{
199	struct im_connection *ic = c->ic;
200	struct jabber_chat *jc = c->data;
201	struct xt_node *node;
202
203	node = xt_new_node("subject", topic, NULL);
204	node = jabber_make_packet("message", "groupchat", jc->name, node);
205
206	if (!jabber_write_packet(ic, node)) {
207	xt_free_node(node);
208	return 0;
209	}
210	xt_free_node(node);
211
212	return 1;
213	}
214
215	int jabber_chat_leave(struct groupchat c, const char reason)
216	{
217	struct im_connection *ic = c->ic;
218	struct jabber_chat *jc = c->data;
219	struct xt_node *node;
220
221	node = xt_new_node("x", NULL, NULL);
222	xt_add_attr(node, "xmlns", XMLNS_MUC);
223	node = jabber_make_packet("presence", "unavailable", jc->my_full_jid, node);
224
225	if (!jabber_write_packet(ic, node)) {
226	xt_free_node(node);
227	return 0;
228	}
229	xt_free_node(node);
230
231	return 1;
232	}
233
234	void jabber_chat_invite(struct groupchat c, char who, char *message)
235	{
236	struct xt_node *node;
237	struct im_connection *ic = c->ic;
238	struct jabber_chat *jc = c->data;
239
240	node = xt_new_node("reason", message, NULL);
241
242	node = xt_new_node("invite", NULL, node);
243	xt_add_attr(node, "to", who);
244
245	node = xt_new_node("x", NULL, node);
246	xt_add_attr(node, "xmlns", XMLNS_MUC_USER);
247
248	node = jabber_make_packet("message", NULL, jc->name, node);
249
250	jabber_write_packet(ic, node);
251
252	xt_free_node(node);
253	}
254
255	static int jabber_chat_has_other_resources(struct im_connection ic, struct jabber_buddy bud)
256	{
257	struct jabber_buddy *cur;
258
259	for (cur = jabber_buddy_by_jid(ic, bud->bare_jid, GET_BUDDY_FIRST); cur; cur = cur->next) {
260	if (cur != bud && jabber_compare_jid(cur->ext_jid, bud->ext_jid)) {
261	return TRUE;
262	}
263	}
264
265	return FALSE;
266	}
267
268	/* Not really the same syntax as the normal pkt_ functions, but this isn't
269	called by the xmltree parser directly and this way I can add some extra
270	parameters so we won't have to repeat too many things done by the caller
271	already. */
272	void jabber_chat_pkt_presence(struct im_connection ic, struct jabber_buddy bud, struct xt_node *node)
273	{
274	struct groupchat *chat;
275	struct xt_node *c;
276	char *type = xt_find_attr(node, "type");
277	struct jabber_data *jd = ic->proto_data;
278	struct jabber_chat *jc;
279	char *s;
280
281	if ((chat = jabber_chat_by_jid(ic, bud->bare_jid)) == NULL) {
282	/* How could this happen?? We could do kill( self, 11 )
283	now or just wait for the OS to do it. :-) */
284	return;
285	}
286
287	jc = chat->data;
288
289	if (type == NULL && !(bud->flags & JBFLAG_IS_CHATROOM)) {
290	bud->flags \|= JBFLAG_IS_CHATROOM;
291	/* If this one wasn't set yet, this buddy just joined the chat.
292	Slightly hackish way of finding out eh? ;-) */
293
294	/* This is pretty messy... Here it sets ext_jid to the real
295	JID of the participant. Works for non-anonymized channels.
296	Might break if someone joins a chat twice, though. */
297	for (c = node->children; (c = xt_find_node(c, "x")); c = c->next) {
298	if ((s = xt_find_attr(c, "xmlns")) &&
299	(strcmp(s, XMLNS_MUC_USER) == 0)) {
300	struct xt_node *item;
301
302	item = xt_find_node(c->children, "item");
303	if ((s = xt_find_attr(item, "jid"))) {
304	/* Yay, found what we need. :-) */
305	bud->ext_jid = jabber_normalize(s);
306	break;
307	}
308	}
309	}
310
311	/* Make up some other handle, if necessary. */
312	if (bud->ext_jid == NULL) {
313	if (bud == jc->me) {
314	bud->ext_jid = g_strdup(jd->me);
315	} else {
316	int i;
317
318	/* Don't want the nick to be at the end, so let's
319	think of some slightly different notation to use
320	for anonymous groupchat participants in BitlBee. */
321	bud->ext_jid = g_strdup_printf("%s=%s", bud->resource, bud->bare_jid);
322
323	/* And strip any unwanted characters. */
324	for (i = 0; bud->resource[i]; i++) {
325	if (bud->ext_jid[i] == '=' \|\| bud->ext_jid[i] == '@') {
326	bud->ext_jid[i] = '_';
327	}
328	}
329	}
330	bud->flags \|= JBFLAG_IS_ANONYMOUS;
331	} else if (bud == jc->me) {
332	g_free(bud->ext_jid);
333	bud->ext_jid = g_strdup(jd->me);
334	}
335
336	if (bud != jc->me && bud->flags & JBFLAG_IS_ANONYMOUS) {
337	/* If JIDs are anonymized, add them to the local
338	list for the duration of this chat. */
339	imcb_add_buddy(ic, bud->ext_jid, NULL);
340	imcb_buddy_nick_hint(ic, bud->ext_jid, bud->resource);
341	}
342
343	if (bud == jc->me && jc->invite != NULL) {
344	char *msg = g_strdup_printf("Please join me in room %s", jc->name);
345	jabber_chat_invite(chat, jc->invite, msg);
346	g_free(jc->invite);
347	g_free(msg);
348	jc->invite = NULL;
349	}
350
351	s = strchr(bud->ext_jid, '/');
352	if (s) {
353	s = 0; / Should NEVER be NULL, but who knows... */
354	}
355
356	imcb_chat_add_buddy(chat, bud->ext_jid);
357
358	if (bud != jc->me && (jc->flags & JCFLAG_ALWAYS_USE_NICKS) && !(bud->flags & JBFLAG_IS_ANONYMOUS)) {
359	imcb_buddy_nick_change(ic, bud->ext_jid, bud->resource);
360	}
361
362	if (s) {
363	*s = '/';
364	}
365	} else if (type) { /* type can only be NULL or "unavailable" in this function */
366	if ((bud->flags & JBFLAG_IS_CHATROOM) && bud->ext_jid && !jabber_chat_has_other_resources(ic, bud)) {
367	char *reason = NULL;
368	char *status = NULL;
369	char *status_text = NULL;
370
371	if ((c = xt_find_node_by_attr(node->children, "x", "xmlns", XMLNS_MUC_USER))) {
372	struct xt_node *c2 = c->children;
373
374	while ((c2 = xt_find_node(c2, "status"))) {
375	char *code = xt_find_attr(c2, "code");
376	if (g_strcmp0(code, "301") == 0) {
377	status = "Banned";
378	break;
379	} else if (g_strcmp0(code, "303") == 0) {
380	/* This could be handled in a cleverer way,
381	* but let's just show a literal part/join for now */
382	status = "Changing nicks";
383	break;
384	} else if (g_strcmp0(code, "307") == 0) {
385	status = "Kicked";
386	break;
387	}
388	c2 = c2->next;
389	}
390
391	/* Sometimes the status message is in presence/x/item/reason */
392	if ((c2 = xt_find_path(c, "item/reason")) && c2->text && c2->text_len) {
393	status_text = c2->text;
394	}
395	}
396
397	/* Sometimes the status message is right inside <presence> */
398	if ((c = xt_find_node(node->children, "status")) && c->text && c->text_len) {
399	status_text = c->text;
400	}
401
402	if (status_text && status) {
403	reason = g_strdup_printf("%s: %s", status, status_text);
404	} else {
405	reason = g_strdup(status_text ? : status);
406	}
407
408	s = strchr(bud->ext_jid, '/');
409	if (s) {
410	*s = 0;
411	}
412	imcb_chat_remove_buddy(chat, bud->ext_jid, reason);
413	if (bud != jc->me && bud->flags & JBFLAG_IS_ANONYMOUS) {
414	imcb_remove_buddy(ic, bud->ext_jid, reason);
415	}
416	if (s) {
417	*s = '/';
418	}
419
420	g_free(reason);
421	}
422
423	if (bud == jc->me) {
424	jabber_chat_free(chat);
425	}
426	}
427	}
428
429	void jabber_chat_pkt_message(struct im_connection ic, struct jabber_buddy bud, struct xt_node *node)
430	{
431	struct xt_node *subject = xt_find_node(node->children, "subject");
432	struct xt_node *body = xt_find_node(node->children, "body");
433	struct groupchat *chat = NULL;
434	struct jabber_chat *jc = NULL;
435	char *from = NULL;
436	char *nick = NULL;
437	char *final_from = NULL;
438	char *bare_jid = NULL;
439	guint32 flags = 0;
440
441	from = (bud) ? bud->full_jid : xt_find_attr(node, "from");
442
443	if (from) {
444	nick = strchr(from, '/');
445	if (nick) {
446	*nick = 0;
447	}
448	chat = jabber_chat_by_jid(ic, from);
449	if (nick) {
450	*nick = '/';
451	nick++;
452	}
453	}
454
455	jc = (chat) ? chat->data : NULL;
456
457	if (!bud) {
458	struct xt_node *c;
459	char *s;
460
461	/* Try some clever stuff to find out the real JID here */
462	c = xt_find_node_by_attr(node->children, "delay", "xmlns", XMLNS_DELAY);
463
464	if (c && ((s = xt_find_attr(c, "from")) \|\|
465	(s = xt_find_attr(c, "from_jid")))) {
466	/* This won't be useful if it's the MUC JID */
467	if (!(jc && jabber_compare_jid(s, jc->name))) {
468	/* Hopefully this one makes more sense! */
469	bud = jabber_buddy_by_jid(ic, s, GET_BUDDY_FIRST \| GET_BUDDY_CREAT);
470	}
471	}
472
473	}
474
475	if (subject && chat) {
476	char empty[1] = "";
477	char *subject_text = subject->text_len > 0 ? subject->text : empty;
478	if (g_strcmp0(chat->topic, subject_text) != 0) {
479	bare_jid = (bud) ? jabber_get_bare_jid(bud->ext_jid) : NULL;
480	imcb_chat_topic(chat, bare_jid, subject_text,
481	jabber_get_timestamp(node));
482	g_free(bare_jid);
483	bare_jid = NULL;
484	}
485	}
486
487	if (body == NULL \|\| body->text_len == 0) {
488	/* Meh. Empty messages aren't very interesting, no matter
489	how much some servers love to send them. */
490	return;
491	}
492
493	if (chat == NULL) {
494	if (nick == NULL) {
495	imcb_log(ic, "System message from unknown groupchat %s: %s", from, body->text);
496	} else {
497	imcb_log(ic, "Groupchat message from unknown JID %s: %s", from, body->text);
498	}
499
500	return;
501	} else if (chat != NULL && bud == NULL && nick == NULL) {
502	imcb_chat_log(chat, "From conference server: %s", body->text);
503	return;
504	} else if (jc && jc->flags & JCFLAG_MESSAGE_SENT && bud == jc->me) {
505	if (jabber_cache_handle_packet(ic, node) == XT_ABORT) {
506	/* Self message marked by this bitlbee, don't show it */
507	return;
508	} else if (xt_find_attr(node, "id") == NULL &&
509	g_strcmp0(body->text, jc->last_sent_message) == 0) {
510	/* Some misbehaving servers (like slack) eat the ids and echo anyway.
511	* Try to detect those cases by comparing against the last sent message. */
512	return;
513	}
514	}
515
516	if (bud) {
517	bare_jid = jabber_get_bare_jid(bud->ext_jid ? bud->ext_jid : bud->full_jid);
518	final_from = bare_jid;
519	if (bud == jc->me \|\| (g_strcasecmp(final_from, ic->acc->user) == 0)) {
520	flags = OPT_SELFMESSAGE;
521	}
522	} else {
523	final_from = nick;
524	}
525
526	imcb_chat_msg(chat, final_from, body->text, flags, jabber_get_timestamp(node));
527
528	g_free(bare_jid);
529	}

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source: protocols/jabber/conference.c @ e9eee04

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