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source: protocols/jabber/conference.c @ ebaebfe

Last change on this file since ebaebfe was bdad407, checked in by Wilmer van der Gaast <wilmer@…>, at 2009-10-04T18:28:41Z
Fixing a crash bug that causes crashes only with buggy Jabber conference servers, sending a "you left this chat" without first acknowledging you entering it.
Property mode set to `100644`
File size: 11.0 KB

Line
1	/***************************************************************************\
2	* *
3	* BitlBee - An IRC to IM gateway *
4	* Jabber module - Conference rooms *
5	* *
6	* Copyright 2007 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
26	static xt_status jabber_chat_join_failed( struct im_connection ic, struct xt_node node, struct xt_node *orig );
27
28	struct groupchat jabber_chat_join( struct im_connection ic, const char room, const char nick, const char *password )
29	{
30	struct jabber_chat *jc;
31	struct xt_node *node;
32	struct groupchat *c;
33	char *roomjid;
34
35	roomjid = g_strdup_printf( "%s/%s", room, nick );
36	node = xt_new_node( "x", NULL, NULL );
37	xt_add_attr( node, "xmlns", XMLNS_MUC );
38	if( password )
39	xt_add_child( node, xt_new_node( "password", password, NULL ) );
40	node = jabber_make_packet( "presence", NULL, roomjid, node );
41	jabber_cache_add( ic, node, jabber_chat_join_failed );
42
43	if( !jabber_write_packet( ic, node ) )
44	{
45	g_free( roomjid );
46	return NULL;
47	}
48
49	jc = g_new0( struct jabber_chat, 1 );
50	jc->name = jabber_normalize( room );
51
52	if( ( jc->me = jabber_buddy_add( ic, roomjid ) ) == NULL )
53	{
54	g_free( roomjid );
55	g_free( jc->name );
56	g_free( jc );
57	return NULL;
58	}
59
60	/* roomjid isn't normalized yet, and we need an original version
61	of the nick to send a proper presence update. */
62	jc->my_full_jid = roomjid;
63
64	c = imcb_chat_new( ic, room );
65	c->data = jc;
66
67	return c;
68	}
69
70	static xt_status jabber_chat_join_failed( struct im_connection ic, struct xt_node node, struct xt_node *orig )
71	{
72	struct jabber_error *err;
73	struct jabber_buddy *bud;
74	char *room;
75
76	room = xt_find_attr( orig, "to" );
77	bud = jabber_buddy_by_jid( ic, room, 0 );
78	err = jabber_error_parse( xt_find_node( node->children, "error" ), XMLNS_STANZA_ERROR );
79	if( err )
80	{
81	imcb_error( ic, "Error joining groupchat %s: %s%s%s", room, err->code,
82	err->text ? ": " : "", err->text ? err->text : "" );
83	jabber_error_free( err );
84	}
85	if( bud )
86	jabber_chat_free( jabber_chat_by_jid( ic, bud->bare_jid ) );
87
88	return XT_HANDLED;
89	}
90
91	struct groupchat jabber_chat_by_jid( struct im_connection ic, const char *name )
92	{
93	char *normalized = jabber_normalize( name );
94	struct groupchat *ret;
95	struct jabber_chat *jc;
96
97	for( ret = ic->groupchats; ret; ret = ret->next )
98	{
99	jc = ret->data;
100	if( strcmp( normalized, jc->name ) == 0 )
101	break;
102	}
103	g_free( normalized );
104
105	return ret;
106	}
107
108	void jabber_chat_free( struct groupchat *c )
109	{
110	struct jabber_chat *jc = c->data;
111
112	jabber_buddy_remove_bare( c->ic, jc->name );
113
114	g_free( jc->my_full_jid );
115	g_free( jc->name );
116	g_free( jc );
117
118	imcb_chat_free( c );
119	}
120
121	int jabber_chat_msg( struct groupchat c, char message, int flags )
122	{
123	struct im_connection *ic = c->ic;
124	struct jabber_chat *jc = c->data;
125	struct xt_node *node;
126
127	jc->flags \|= JCFLAG_MESSAGE_SENT;
128
129	node = xt_new_node( "body", message, NULL );
130	node = jabber_make_packet( "message", "groupchat", jc->name, node );
131
132	if( !jabber_write_packet( ic, node ) )
133	{
134	xt_free_node( node );
135	return 0;
136	}
137	xt_free_node( node );
138
139	return 1;
140	}
141
142	int jabber_chat_topic( struct groupchat c, char topic )
143	{
144	struct im_connection *ic = c->ic;
145	struct jabber_chat *jc = c->data;
146	struct xt_node *node;
147
148	node = xt_new_node( "subject", topic, NULL );
149	node = jabber_make_packet( "message", "groupchat", jc->name, node );
150
151	if( !jabber_write_packet( ic, node ) )
152	{
153	xt_free_node( node );
154	return 0;
155	}
156	xt_free_node( node );
157
158	return 1;
159	}
160
161	int jabber_chat_leave( struct groupchat c, const char reason )
162	{
163	struct im_connection *ic = c->ic;
164	struct jabber_chat *jc = c->data;
165	struct xt_node *node;
166
167	node = xt_new_node( "x", NULL, NULL );
168	xt_add_attr( node, "xmlns", XMLNS_MUC );
169	node = jabber_make_packet( "presence", "unavailable", jc->my_full_jid, node );
170
171	if( !jabber_write_packet( ic, node ) )
172	{
173	xt_free_node( node );
174	return 0;
175	}
176	xt_free_node( node );
177
178	return 1;
179	}
180
181	void jabber_chat_invite( struct groupchat c, char who, char *message )
182	{
183	struct xt_node *node;
184	struct im_connection *ic = c->ic;
185	struct jabber_chat *jc = c->data;
186
187	node = xt_new_node( "reason", message, NULL );
188
189	node = xt_new_node( "invite", NULL, node );
190	xt_add_attr( node, "to", who );
191
192	node = xt_new_node( "x", NULL, node );
193	xt_add_attr( node, "xmlns", XMLNS_MUC_USER );
194
195	node = jabber_make_packet( "message", NULL, jc->name, node );
196
197	jabber_write_packet( ic, node );
198
199	xt_free_node( node );
200	}
201
202	/* Not really the same syntax as the normal pkt_ functions, but this isn't
203	called by the xmltree parser directly and this way I can add some extra
204	parameters so we won't have to repeat too many things done by the caller
205	already. */
206	void jabber_chat_pkt_presence( struct im_connection ic, struct jabber_buddy bud, struct xt_node *node )
207	{
208	struct groupchat *chat;
209	struct xt_node *c;
210	char *type = xt_find_attr( node, "type" );
211	struct jabber_chat *jc;
212	char *s;
213
214	if( ( chat = jabber_chat_by_jid( ic, bud->bare_jid ) ) == NULL )
215	{
216	/* How could this happen?? We could do kill( self, 11 )
217	now or just wait for the OS to do it. :-) */
218	return;
219	}
220
221	jc = chat->data;
222
223	if( type == NULL && !( bud->flags & JBFLAG_IS_CHATROOM ) )
224	{
225	bud->flags \|= JBFLAG_IS_CHATROOM;
226	/* If this one wasn't set yet, this buddy just joined the chat.
227	Slightly hackish way of finding out eh? ;-) */
228
229	/* This is pretty messy... Here it sets ext_jid to the real
230	JID of the participant. Works for non-anonymized channels.
231	Might break if someone joins a chat twice, though. */
232	for( c = node->children; ( c = xt_find_node( c, "x" ) ); c = c->next )
233	if( ( s = xt_find_attr( c, "xmlns" ) ) &&
234	( strcmp( s, XMLNS_MUC_USER ) == 0 ) )
235	{
236	struct xt_node *item;
237
238	item = xt_find_node( c->children, "item" );
239	if( ( s = xt_find_attr( item, "jid" ) ) )
240	{
241	/* Yay, found what we need. :-) */
242	bud->ext_jid = jabber_normalize( s );
243	break;
244	}
245	}
246
247	/* Make up some other handle, if necessary. */
248	if( bud->ext_jid == NULL )
249	{
250	if( bud == jc->me )
251	{
252	bud->ext_jid = jabber_normalize( ic->acc->user );
253	}
254	else
255	{
256	int i;
257
258	/* Don't want the nick to be at the end, so let's
259	think of some slightly different notation to use
260	for anonymous groupchat participants in BitlBee. */
261	bud->ext_jid = g_strdup_printf( "%s=%s", bud->resource, bud->bare_jid );
262
263	/* And strip any unwanted characters. */
264	for( i = 0; bud->resource[i]; i ++ )
265	if( bud->ext_jid[i] == '=' \|\| bud->ext_jid[i] == '@' )
266	bud->ext_jid[i] = '_';
267
268	/* Some program-specific restrictions. */
269	imcb_clean_handle( ic, bud->ext_jid );
270	}
271	bud->flags \|= JBFLAG_IS_ANONYMOUS;
272	}
273
274	if( bud != jc->me )
275	{
276	imcb_add_buddy( ic, bud->ext_jid, NULL );
277	imcb_buddy_nick_hint( ic, bud->ext_jid, bud->resource );
278	}
279
280	s = strchr( bud->ext_jid, '/' );
281	if( s ) s = 0; / Should NEVER be NULL, but who knows... */
282	imcb_chat_add_buddy( chat, bud->ext_jid );
283	if( s ) *s = '/';
284	}
285	else if( type ) /* type can only be NULL or "unavailable" in this function */
286	{
287	if( ( bud->flags & JBFLAG_IS_CHATROOM ) && bud->ext_jid )
288	{
289	s = strchr( bud->ext_jid, '/' );
290	if( s ) *s = 0;
291	imcb_chat_remove_buddy( chat, bud->ext_jid, NULL );
292	if( bud != jc->me && bud->flags & JBFLAG_IS_ANONYMOUS )
293	imcb_remove_buddy( ic, bud->ext_jid, NULL );
294	if( s ) *s = '/';
295	}
296
297	if( bud == jc->me )
298	jabber_chat_free( chat );
299	}
300	}
301
302	void jabber_chat_pkt_message( struct im_connection ic, struct jabber_buddy bud, struct xt_node *node )
303	{
304	struct xt_node *subject = xt_find_node( node->children, "subject" );
305	struct xt_node *body = xt_find_node( node->children, "body" );
306	struct groupchat *chat = bud ? jabber_chat_by_jid( ic, bud->bare_jid ) : NULL;
307	struct jabber_chat *jc = chat ? chat->data : NULL;
308	char *s;
309
310	if( bud == NULL \|\| ( jc && ~jc->flags & JCFLAG_MESSAGE_SENT && bud == jc->me ) )
311	{
312	char *nick;
313
314	if( body == NULL \|\| body->text_len == 0 )
315	/* Meh. Empty messages aren't very interesting, no matter
316	how much some servers love to send them. */
317	return;
318
319	s = xt_find_attr( node, "from" ); /* pkt_message() already NULL-checked this one. */
320	nick = strchr( s, '/' );
321	if( nick )
322	{
323	/* If this message included a resource/nick we don't know,
324	we might still know the groupchat itself. */
325	*nick = 0;
326	chat = jabber_chat_by_jid( ic, s );
327	*nick = '/';
328
329	nick ++;
330	}
331	else
332	{
333	/* message.c uses the EXACT_JID option, so bud should
334	always be NULL here for bare JIDs. */
335	chat = jabber_chat_by_jid( ic, s );
336	}
337
338	if( nick == NULL )
339	{
340	/* This is fine, the groupchat itself isn't in jd->buddies. */
341	if( chat )
342	imcb_chat_log( chat, "From conference server: %s", body->text );
343	else
344	imcb_log( ic, "System message from unknown groupchat %s: %s", s, body->text );
345	}
346	else
347	{
348	/* This can happen too, at least when receiving a backlog when
349	just joining a channel. */
350	if( chat )
351	imcb_chat_log( chat, "Message from unknown participant %s: %s", nick, body->text );
352	else
353	imcb_log( ic, "Groupchat message from unknown JID %s: %s", s, body->text );
354	}
355
356	return;
357	}
358	else if( chat == NULL )
359	{
360	/* How could this happen?? We could do kill( self, 11 )
361	now or just wait for the OS to do it. :-) */
362	return;
363	}
364
365	if( subject )
366	{
367	s = strchr( bud->ext_jid, '/' );
368	if( s ) *s = 0;
369	imcb_chat_topic( chat, bud->ext_jid, subject->text_len > 0 ?
370	subject->text : NULL, jabber_get_timestamp( node ) );
371	if( s ) *s = '/';
372	}
373	if( body && body->text_len > 0 )
374	{
375	s = strchr( bud->ext_jid, '/' );
376	if( s ) *s = 0;
377	imcb_chat_msg( chat, bud->ext_jid, body->text, 0, jabber_get_timestamp( node ) );
378	if( s ) *s = '/';
379	}
380	}

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