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source: protocols/jabber/jabber.c @ 911d97a

Last change on this file since 911d97a was 911d97a, checked in by Wilmer van der Gaast <wilmer@…>, at 2011-08-04T15:19:54Z

Error handling fixes.

Found one double free() bug causing troubles when a buddy_msg() handler takes
down the IM connection immediately.

Property mode set to 100644

File size: 17.3 KB

Line
1	/***************************************************************************\
2	* *
3	* BitlBee - An IRC to IM gateway *
4	* Jabber module - Main file *
5	* *
6	* Copyright 2006 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 <glib.h>
25	#include <string.h>
26	#include <unistd.h>
27	#include <ctype.h>
28	#include <stdio.h>
29
30	#include "ssl_client.h"
31	#include "xmltree.h"
32	#include "bitlbee.h"
33	#include "jabber.h"
34	#include "md5.h"
35
36	GSList *jabber_connections;
37
38	/* First enty is the default */
39	static const int jabber_port_list[] = {
40	5222,
41	5223,
42	5220,
43	5221,
44	5224,
45	5225,
46	5226,
47	5227,
48	5228,
49	5229,
50	80,
51	443,
52	0
53	};
54
55	static void jabber_init( account_t *acc )
56	{
57	set_t *s;
58	char str[16];
59
60	s = set_add( &acc->set, "activity_timeout", "600", set_eval_int, acc );
61
62	s = set_add( &acc->set, "oauth", "false", set_eval_bool, acc );
63
64	g_snprintf( str, sizeof( str ), "%d", jabber_port_list[0] );
65	s = set_add( &acc->set, "port", str, set_eval_int, acc );
66	s->flags \|= ACC_SET_OFFLINE_ONLY;
67
68	s = set_add( &acc->set, "priority", "0", set_eval_priority, acc );
69
70	s = set_add( &acc->set, "proxy", "<local>;<auto>", NULL, acc );
71
72	s = set_add( &acc->set, "resource", "BitlBee", NULL, acc );
73	s->flags \|= ACC_SET_OFFLINE_ONLY;
74
75	s = set_add( &acc->set, "resource_select", "activity", NULL, acc );
76
77	s = set_add( &acc->set, "server", NULL, set_eval_account, acc );
78	s->flags \|= ACC_SET_NOSAVE \| ACC_SET_OFFLINE_ONLY \| SET_NULL_OK;
79
80	s = set_add( &acc->set, "ssl", "false", set_eval_bool, acc );
81	s->flags \|= ACC_SET_OFFLINE_ONLY;
82
83	s = set_add( &acc->set, "tls", "try", set_eval_tls, acc );
84	s->flags \|= ACC_SET_OFFLINE_ONLY;
85
86	s = set_add( &acc->set, "user_agent", "BitlBee", NULL, acc );
87
88	s = set_add( &acc->set, "xmlconsole", "false", set_eval_bool, acc );
89	s->flags \|= ACC_SET_OFFLINE_ONLY;
90
91	acc->flags \|= ACC_FLAG_AWAY_MESSAGE \| ACC_FLAG_STATUS_MESSAGE;
92	}
93
94	static void jabber_generate_id_hash( struct jabber_data *jd );
95
96	static void jabber_login( account_t *acc )
97	{
98	struct im_connection *ic = imcb_new( acc );
99	struct jabber_data *jd = g_new0( struct jabber_data, 1 );
100	char *s;
101
102	/* For now this is needed in the _connected() handlers if using
103	GLib event handling, to make sure we're not handling events
104	on dead connections. */
105	jabber_connections = g_slist_prepend( jabber_connections, ic );
106
107	jd->ic = ic;
108	ic->proto_data = jd;
109
110	jd->username = g_strdup( acc->user );
111	jd->server = strchr( jd->username, '@' );
112
113	jd->fd = jd->r_inpa = jd->w_inpa = -1;
114
115	if( jd->server == NULL )
116	{
117	imcb_error( ic, "Incomplete account name (format it like <username@jabberserver.name>)" );
118	imc_logout( ic, FALSE );
119	return;
120	}
121
122	/* So don't think of free()ing jd->server.. :-) */
123	*jd->server = 0;
124	jd->server ++;
125
126	if( ( s = strchr( jd->server, '/' ) ) )
127	{
128	*s = 0;
129	set_setstr( &acc->set, "resource", s + 1 );
130
131	/* Also remove the /resource from the original variable so we
132	won't have to do this again every time. */
133	s = strchr( acc->user, '/' );
134	*s = 0;
135	}
136
137	jd->node_cache = g_hash_table_new_full( g_str_hash, g_str_equal, NULL, jabber_cache_entry_free );
138	jd->buddies = g_hash_table_new( g_str_hash, g_str_equal );
139
140	if( set_getbool( &acc->set, "oauth" ) )
141	{
142	jd->fd = jd->r_inpa = jd->w_inpa = -1;
143
144	/* For the first login with OAuth, we have to authenticate via the browser.
145	For subsequent logins, exchange the refresh token for a valid access
146	token (even though the last one maybe didn't expire yet). */
147	if( strncmp( acc->pass, "refresh_token=", 14 ) != 0 )
148	{
149	sasl_oauth2_init( ic );
150	ic->flags \|= OPT_SLOW_LOGIN;
151	}
152	else
153	sasl_oauth2_refresh( ic, acc->pass + 14 );
154	}
155	else
156	jabber_connect( ic );
157	}
158
159	/* Separate this from jabber_login() so we can do OAuth first if necessary.
160	Putting this in io.c would probably be more correct. */
161	void jabber_connect( struct im_connection *ic )
162	{
163	account_t *acc = ic->acc;
164	struct jabber_data *jd = ic->proto_data;
165	int i;
166	char *connect_to;
167	struct ns_srv_reply *srvl = NULL, srv = NULL;
168
169	/* Figure out the hostname to connect to. */
170	if( acc->server && *acc->server )
171	connect_to = acc->server;
172	else if( ( srvl = srv_lookup( "xmpp-client", "tcp", jd->server ) ) \|\|
173	( srvl = srv_lookup( "jabber-client", "tcp", jd->server ) ) )
174	{
175	/* Find the lowest-priority one. These usually come
176	back in random/shuffled order. Not looking at
177	weights etc for now. */
178	srv = *srvl;
179	for( i = 1; srvl[i]; i ++ )
180	if( srvl[i]->prio < srv->prio )
181	srv = srvl[i];
182
183	connect_to = srv->name;
184	}
185	else
186	connect_to = jd->server;
187
188	imcb_log( ic, "Connecting" );
189
190	for( i = 0; jabber_port_list[i] > 0; i ++ )
191	if( set_getint( &acc->set, "port" ) == jabber_port_list[i] )
192	break;
193
194	if( jabber_port_list[i] == 0 )
195	{
196	imcb_log( ic, "Illegal port number" );
197	imc_logout( ic, FALSE );
198	return;
199	}
200
201	/* For non-SSL connections we can try to use the port # from the SRV
202	reply, but let's not do that when using SSL, SSL usually runs on
203	non-standard ports... */
204	if( set_getbool( &acc->set, "ssl" ) )
205	{
206	jd->ssl = ssl_connect( connect_to, set_getint( &acc->set, "port" ), jabber_connected_ssl, ic );
207	jd->fd = jd->ssl ? ssl_getfd( jd->ssl ) : -1;
208	}
209	else
210	{
211	jd->fd = proxy_connect( connect_to, srv ? srv->port : set_getint( &acc->set, "port" ), jabber_connected_plain, ic );
212	}
213	srv_free( srvl );
214
215	if( jd->fd == -1 )
216	{
217	imcb_error( ic, "Could not connect to server" );
218	imc_logout( ic, TRUE );
219
220	return;
221	}
222
223	if( set_getbool( &acc->set, "xmlconsole" ) )
224	{
225	jd->flags \|= JFLAG_XMLCONSOLE;
226	/* Shouldn't really do this at this stage already, maybe. But
227	I think this shouldn't break anything. */
228	imcb_add_buddy( ic, JABBER_XMLCONSOLE_HANDLE, NULL );
229	}
230
231	jabber_generate_id_hash( jd );
232	}
233
234	/* This generates an unfinished md5_state_t variable. Every time we generate
235	an ID, we finish the state by adding a sequence number and take the hash. */
236	static void jabber_generate_id_hash( struct jabber_data *jd )
237	{
238	md5_byte_t binbuf[4];
239	char *s;
240
241	md5_init( &jd->cached_id_prefix );
242	md5_append( &jd->cached_id_prefix, (unsigned char *) jd->username, strlen( jd->username ) );
243	md5_append( &jd->cached_id_prefix, (unsigned char *) jd->server, strlen( jd->server ) );
244	s = set_getstr( &jd->ic->acc->set, "resource" );
245	md5_append( &jd->cached_id_prefix, (unsigned char *) s, strlen( s ) );
246	random_bytes( binbuf, 4 );
247	md5_append( &jd->cached_id_prefix, binbuf, 4 );
248	}
249
250	static void jabber_logout( struct im_connection *ic )
251	{
252	struct jabber_data *jd = ic->proto_data;
253
254	while( jd->filetransfers )
255	imcb_file_canceled( ic, ( ( struct jabber_transfer *) jd->filetransfers->data )->ft, "Logging out" );
256
257	while( jd->streamhosts )
258	{
259	jabber_streamhost_t *sh = jd->streamhosts->data;
260	jd->streamhosts = g_slist_remove( jd->streamhosts, sh );
261	g_free( sh->jid );
262	g_free( sh->host );
263	g_free( sh );
264	}
265
266	if( jd->fd >= 0 )
267	jabber_end_stream( ic );
268
269	while( ic->groupchats )
270	jabber_chat_free( ic->groupchats->data );
271
272	if( jd->r_inpa >= 0 )
273	b_event_remove( jd->r_inpa );
274	if( jd->w_inpa >= 0 )
275	b_event_remove( jd->w_inpa );
276
277	if( jd->ssl )
278	ssl_disconnect( jd->ssl );
279	if( jd->fd >= 0 )
280	closesocket( jd->fd );
281
282	if( jd->tx_len )
283	g_free( jd->txq );
284
285	if( jd->node_cache )
286	g_hash_table_destroy( jd->node_cache );
287
288	jabber_buddy_remove_all( ic );
289
290	xt_free( jd->xt );
291
292	g_free( jd->oauth2_access_token );
293	g_free( jd->away_message );
294	g_free( jd->username );
295	g_free( jd );
296
297	jabber_connections = g_slist_remove( jabber_connections, ic );
298	}
299
300	static int jabber_buddy_msg( struct im_connection ic, char who, char *message, int flags )
301	{
302	struct jabber_data *jd = ic->proto_data;
303	struct jabber_buddy *bud;
304	struct xt_node *node;
305	char *s;
306	int st;
307
308	if( g_strcasecmp( who, JABBER_XMLCONSOLE_HANDLE ) == 0 )
309	return jabber_write( ic, message, strlen( message ) );
310
311	if( g_strcasecmp( who, "jabber_oauth" ) == 0 )
312	{
313	if( sasl_oauth2_get_refresh_token( ic, message ) )
314	{
315	return 1;
316	}
317	else
318	{
319	imcb_error( ic, "OAuth failure" );
320	imc_logout( ic, TRUE );
321	return 0;
322	}
323	}
324
325	if( ( s = strchr( who, '=' ) ) && jabber_chat_by_jid( ic, s + 1 ) )
326	bud = jabber_buddy_by_ext_jid( ic, who, 0 );
327	else
328	bud = jabber_buddy_by_jid( ic, who, GET_BUDDY_BARE_OK );
329
330	node = xt_new_node( "body", message, NULL );
331	node = jabber_make_packet( "message", "chat", bud ? bud->full_jid : who, node );
332
333	if( bud && ( jd->flags & JFLAG_WANT_TYPING ) &&
334	( ( bud->flags & JBFLAG_DOES_XEP85 ) \|\|
335	!( bud->flags & JBFLAG_PROBED_XEP85 ) ) )
336	{
337	struct xt_node *act;
338
339	/* If the user likes typing notification and if we don't know
340	(and didn't probe before) if this resource supports XEP85,
341	include a probe in this packet now. Also, if we know this
342	buddy does support XEP85, we have to send this <active/>
343	tag to tell that the user stopped typing (well, that's what
344	we guess when s/he pressed Enter...). */
345	act = xt_new_node( "active", NULL, NULL );
346	xt_add_attr( act, "xmlns", XMLNS_CHATSTATES );
347	xt_add_child( node, act );
348
349	/* Just make sure we do this only once. */
350	bud->flags \|= JBFLAG_PROBED_XEP85;
351	}
352
353	st = jabber_write_packet( ic, node );
354	xt_free_node( node );
355
356	return st;
357	}
358
359	static GList jabber_away_states( struct im_connection ic )
360	{
361	static GList *l = NULL;
362	int i;
363
364	if( l == NULL )
365	for( i = 0; jabber_away_state_list[i].full_name; i ++ )
366	l = g_list_append( l, (void*) jabber_away_state_list[i].full_name );
367
368	return l;
369	}
370
371	static void jabber_get_info( struct im_connection ic, char who )
372	{
373	struct jabber_buddy *bud;
374
375	bud = jabber_buddy_by_jid( ic, who, GET_BUDDY_FIRST );
376
377	while( bud )
378	{
379	imcb_log( ic, "Buddy %s (%d) information:", bud->full_jid, bud->priority );
380	if( bud->away_state )
381	imcb_log( ic, "Away state: %s", bud->away_state->full_name );
382	imcb_log( ic, "Status message: %s", bud->away_message ? bud->away_message : "(none)" );
383
384	bud = bud->next;
385	}
386
387	jabber_get_vcard( ic, bud ? bud->full_jid : who );
388	}
389
390	static void jabber_set_away( struct im_connection ic, char state_txt, char *message )
391	{
392	struct jabber_data *jd = ic->proto_data;
393
394	/* state_txt == NULL -> Not away.
395	Unknown state -> fall back to the first defined away state. */
396	if( state_txt == NULL )
397	jd->away_state = NULL;
398	else if( ( jd->away_state = jabber_away_state_by_name( state_txt ) ) == NULL )
399	jd->away_state = jabber_away_state_list;
400
401	g_free( jd->away_message );
402	jd->away_message = ( message && *message ) ? g_strdup( message ) : NULL;
403
404	presence_send_update( ic );
405	}
406
407	static void jabber_add_buddy( struct im_connection ic, char who, char *group )
408	{
409	struct jabber_data *jd = ic->proto_data;
410
411	if( g_strcasecmp( who, JABBER_XMLCONSOLE_HANDLE ) == 0 )
412	{
413	jd->flags \|= JFLAG_XMLCONSOLE;
414	imcb_add_buddy( ic, JABBER_XMLCONSOLE_HANDLE, NULL );
415	return;
416	}
417
418	if( jabber_add_to_roster( ic, who, NULL, group ) )
419	presence_send_request( ic, who, "subscribe" );
420	}
421
422	static void jabber_remove_buddy( struct im_connection ic, char who, char *group )
423	{
424	struct jabber_data *jd = ic->proto_data;
425
426	if( g_strcasecmp( who, JABBER_XMLCONSOLE_HANDLE ) == 0 )
427	{
428	jd->flags &= ~JFLAG_XMLCONSOLE;
429	/* Not necessary for now. And for now the code isn't too
430	happy if the buddy is completely gone right after calling
431	this function already.
432	imcb_remove_buddy( ic, JABBER_XMLCONSOLE_HANDLE, NULL );
433	*/
434	return;
435	}
436
437	/* We should always do this part. Clean up our administration a little bit. */
438	jabber_buddy_remove_bare( ic, who );
439
440	if( jabber_remove_from_roster( ic, who ) )
441	presence_send_request( ic, who, "unsubscribe" );
442	}
443
444	static struct groupchat jabber_chat_join_( struct im_connection ic, const char room, const char nick, const char password, set_t *sets )
445	{
446	if( strchr( room, '@' ) == NULL )
447	imcb_error( ic, "Invalid room name: %s", room );
448	else if( jabber_chat_by_jid( ic, room ) )
449	imcb_error( ic, "Already present in chat `%s'", room );
450	else
451	return jabber_chat_join( ic, room, nick, set_getstr( sets, "password" ) );
452
453	return NULL;
454	}
455
456	static void jabber_chat_msg_( struct groupchat c, char message, int flags )
457	{
458	if( c && message )
459	jabber_chat_msg( c, message, flags );
460	}
461
462	static void jabber_chat_topic_( struct groupchat c, char topic )
463	{
464	if( c && topic )
465	jabber_chat_topic( c, topic );
466	}
467
468	static void jabber_chat_leave_( struct groupchat *c )
469	{
470	if( c )
471	jabber_chat_leave( c, NULL );
472	}
473
474	static void jabber_chat_invite_( struct groupchat c, char who, char *msg )
475	{
476	struct jabber_chat *jc = c->data;
477	gchar *msg_alt = NULL;
478
479	if( msg == NULL )
480	msg_alt = g_strdup_printf( "%s invited you to %s", c->ic->acc->user, jc->name );
481
482	if( c && who )
483	jabber_chat_invite( c, who, msg ? msg : msg_alt );
484
485	g_free( msg_alt );
486	}
487
488	static void jabber_keepalive( struct im_connection *ic )
489	{
490	/* Just any whitespace character is enough as a keepalive for XMPP sessions. */
491	if( !jabber_write( ic, "\n", 1 ) )
492	return;
493
494	/* This runs the garbage collection every minute, which means every packet
495	is in the cache for about a minute (which should be enough AFAIK). */
496	jabber_cache_clean( ic );
497	}
498
499	static int jabber_send_typing( struct im_connection ic, char who, int typing )
500	{
501	struct jabber_data *jd = ic->proto_data;
502	struct jabber_buddy *bud;
503
504	/* Enable typing notification related code from now. */
505	jd->flags \|= JFLAG_WANT_TYPING;
506
507	if( ( bud = jabber_buddy_by_jid( ic, who, 0 ) ) == NULL )
508	{
509	/* Sending typing notifications to unknown buddies is
510	unsupported for now. Shouldn't be a problem, I think. */
511	return 0;
512	}
513
514	if( bud->flags & JBFLAG_DOES_XEP85 )
515	{
516	/* We're only allowed to send this stuff if we know the other
517	side supports it. */
518
519	struct xt_node *node;
520	char *type;
521	int st;
522
523	if( typing & OPT_TYPING )
524	type = "composing";
525	else if( typing & OPT_THINKING )
526	type = "paused";
527	else
528	type = "active";
529
530	node = xt_new_node( type, NULL, NULL );
531	xt_add_attr( node, "xmlns", XMLNS_CHATSTATES );
532	node = jabber_make_packet( "message", "chat", bud->full_jid, node );
533
534	st = jabber_write_packet( ic, node );
535	xt_free_node( node );
536
537	return st;
538	}
539
540	return 1;
541	}
542
543	void jabber_chat_add_settings( account_t acc, set_t *head )
544	{
545	/* Meh. Stupid room passwords. Not trying to obfuscate/hide
546	them from the user for now. */
547	set_add( head, "password", NULL, NULL, NULL );
548	}
549
550	void jabber_chat_free_settings( account_t acc, set_t *head )
551	{
552	set_del( head, "password" );
553	}
554
555	GList jabber_buddy_action_list( bee_user_t bu )
556	{
557	static GList *ret = NULL;
558
559	if( ret == NULL )
560	{
561	static const struct buddy_action ba[2] = {
562	{ "VERSION", "Get client (version) information" },
563	};
564
565	ret = g_list_prepend( ret, (void*) ba + 0 );
566	}
567
568	return ret;
569	}
570
571	void jabber_buddy_action( struct bee_user bu, const char action, char const args[], void *data )
572	{
573	if( g_strcasecmp( action, "VERSION" ) == 0 )
574	{
575	struct jabber_buddy *bud;
576
577	if( ( bud = jabber_buddy_by_ext_jid( bu->ic, bu->handle, 0 ) ) == NULL )
578	bud = jabber_buddy_by_jid( bu->ic, bu->handle, GET_BUDDY_FIRST );
579	for( ; bud; bud = bud->next )
580	jabber_iq_version_send( bu->ic, bud, data );
581	}
582
583	return NULL;
584	}
585
586	void jabber_initmodule()
587	{
588	struct prpl *ret = g_new0( struct prpl, 1 );
589
590	ret->name = "jabber";
591	ret->mms = 0; /* no limit */
592	ret->login = jabber_login;
593	ret->init = jabber_init;
594	ret->logout = jabber_logout;
595	ret->buddy_msg = jabber_buddy_msg;
596	ret->away_states = jabber_away_states;
597	ret->set_away = jabber_set_away;
598	// ret->set_info = jabber_set_info;
599	ret->get_info = jabber_get_info;
600	ret->add_buddy = jabber_add_buddy;
601	ret->remove_buddy = jabber_remove_buddy;
602	ret->chat_msg = jabber_chat_msg_;
603	ret->chat_topic = jabber_chat_topic_;
604	ret->chat_invite = jabber_chat_invite_;
605	ret->chat_leave = jabber_chat_leave_;
606	ret->chat_join = jabber_chat_join_;
607	ret->chat_add_settings = jabber_chat_add_settings;
608	ret->chat_free_settings = jabber_chat_free_settings;
609	ret->keepalive = jabber_keepalive;
610	ret->send_typing = jabber_send_typing;
611	ret->handle_cmp = g_strcasecmp;
612	ret->transfer_request = jabber_si_transfer_request;
613	ret->buddy_action_list = jabber_buddy_action_list;
614	ret->buddy_action = jabber_buddy_action;
615
616	register_protocol( ret );
617	}

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