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source: protocols/jabber/jabber.c @ 5513f3e

Last change on this file since 5513f3e was 792a93b, checked in by Wilmer van der Gaast <wilmer@…>, at 2011-12-23T12:44:08Z
Merging SSL certificate verification for GnuTLS, with help from AopicieR.
Property mode set to `100644`
File size: 18.2 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	g_snprintf( str, sizeof( str ), "%d", jabber_port_list[0] );
63	s = set_add( &acc->set, "port", str, set_eval_int, acc );
64	s->flags \|= ACC_SET_OFFLINE_ONLY;
65
66	s = set_add( &acc->set, "priority", "0", set_eval_priority, acc );
67
68	s = set_add( &acc->set, "proxy", "<local>;<auto>", NULL, acc );
69
70	s = set_add( &acc->set, "resource", "BitlBee", NULL, acc );
71	s->flags \|= ACC_SET_OFFLINE_ONLY;
72
73	s = set_add( &acc->set, "resource_select", "activity", NULL, acc );
74
75	s = set_add( &acc->set, "server", NULL, set_eval_account, acc );
76	s->flags \|= ACC_SET_NOSAVE \| ACC_SET_OFFLINE_ONLY \| SET_NULL_OK;
77
78	s = set_add( &acc->set, "ssl", "false", set_eval_bool, acc );
79	s->flags \|= ACC_SET_OFFLINE_ONLY;
80
81	s = set_add( &acc->set, "tls", "try", set_eval_tls, acc );
82	s->flags \|= ACC_SET_OFFLINE_ONLY;
83
84	s = set_add( &acc->set, "tls_verify", "true", set_eval_bool, acc );
85	s->flags \|= ACC_SET_OFFLINE_ONLY;
86
87	s = set_add( &acc->set, "sasl", "true", set_eval_bool, acc );
88	s->flags \|= ACC_SET_OFFLINE_ONLY \| SET_HIDDEN_DEFAULT;
89
90	s = set_add( &acc->set, "user_agent", "BitlBee", NULL, acc );
91
92	s = set_add( &acc->set, "xmlconsole", "false", set_eval_bool, acc );
93	s->flags \|= ACC_SET_OFFLINE_ONLY;
94
95	acc->flags \|= ACC_FLAG_AWAY_MESSAGE \| ACC_FLAG_STATUS_MESSAGE;
96	}
97
98	static void jabber_generate_id_hash( struct jabber_data *jd );
99
100	static void jabber_login( account_t *acc )
101	{
102	struct im_connection *ic = imcb_new( acc );
103	struct jabber_data *jd = g_new0( struct jabber_data, 1 );
104	struct ns_srv_reply *srvl = NULL, srv = NULL;
105	char connect_to, s;
106	int i;
107
108	/* For now this is needed in the _connected() handlers if using
109	GLib event handling, to make sure we're not handling events
110	on dead connections. */
111	jabber_connections = g_slist_prepend( jabber_connections, ic );
112
113	jd->ic = ic;
114	ic->proto_data = jd;
115
116	jd->username = g_strdup( acc->user );
117	jd->server = strchr( jd->username, '@' );
118
119	jd->fd = jd->r_inpa = jd->w_inpa = -1;
120
121	if( jd->server == NULL )
122	{
123	imcb_error( ic, "Incomplete account name (format it like <username@jabberserver.name>)" );
124	imc_logout( ic, FALSE );
125	return;
126	}
127
128	/* So don't think of free()ing jd->server.. :-) */
129	*jd->server = 0;
130	jd->server ++;
131
132	if( ( s = strchr( jd->server, '/' ) ) )
133	{
134	*s = 0;
135	set_setstr( &acc->set, "resource", s + 1 );
136
137	/* Also remove the /resource from the original variable so we
138	won't have to do this again every time. */
139	s = strchr( acc->user, '/' );
140	*s = 0;
141	}
142
143	/* This code isn't really pretty. Backwards compatibility never is... */
144	s = acc->server;
145	while( s )
146	{
147	static int had_port = 0;
148
149	if( strncmp( s, "ssl", 3 ) == 0 )
150	{
151	set_setstr( &acc->set, "ssl", "true" );
152
153	/* Flush this part so that (if this was the first
154	part of the server string) acc->server gets
155	flushed. We don't want to have to do this another
156	time. :-) */
157	*s = 0;
158	s ++;
159
160	/* Only set this if the user didn't specify a custom
161	port number already... */
162	if( !had_port )
163	set_setint( &acc->set, "port", 5223 );
164	}
165	else if( isdigit( *s ) )
166	{
167	int i;
168
169	/* The first character is a digit. It could be an
170	IP address though. Only accept this as a port#
171	if there are only digits. */
172	for( i = 0; isdigit( s[i] ); i ++ );
173
174	/* If the first non-digit character is a colon or
175	the end of the string, save the port number
176	where it should be. */
177	if( s[i] == ':' \|\| s[i] == 0 )
178	{
179	sscanf( s, "%d", &i );
180	set_setint( &acc->set, "port", i );
181
182	/* See above. */
183	*s = 0;
184	s ++;
185	}
186
187	had_port = 1;
188	}
189
190	s = strchr( s, ':' );
191	if( s )
192	{
193	*s = 0;
194	s ++;
195	}
196	}
197
198	jd->node_cache = g_hash_table_new_full( g_str_hash, g_str_equal, NULL, jabber_cache_entry_free );
199	jd->buddies = g_hash_table_new( g_str_hash, g_str_equal );
200
201	/* Figure out the hostname to connect to. */
202	if( acc->server && *acc->server )
203	connect_to = acc->server;
204	else if( ( srvl = srv_lookup( "xmpp-client", "tcp", jd->server ) ) \|\|
205	( srvl = srv_lookup( "jabber-client", "tcp", jd->server ) ) )
206	{
207	/* Find the lowest-priority one. These usually come
208	back in random/shuffled order. Not looking at
209	weights etc for now. */
210	srv = *srvl;
211	for( i = 1; srvl[i]; i ++ )
212	if( srvl[i]->prio < srv->prio )
213	srv = srvl[i];
214
215	connect_to = srv->name;
216	}
217	else
218	connect_to = jd->server;
219
220	imcb_log( ic, "Connecting" );
221
222	for( i = 0; jabber_port_list[i] > 0; i ++ )
223	if( set_getint( &acc->set, "port" ) == jabber_port_list[i] )
224	break;
225
226	if( jabber_port_list[i] == 0 )
227	{
228	imcb_log( ic, "Illegal port number" );
229	imc_logout( ic, FALSE );
230	return;
231	}
232
233	/* For non-SSL connections we can try to use the port # from the SRV
234	reply, but let's not do that when using SSL, SSL usually runs on
235	non-standard ports... */
236	if( set_getbool( &acc->set, "ssl" ) )
237	{
238	jd->ssl = ssl_connect( connect_to, set_getint( &acc->set, "port" ), FALSE, jabber_connected_ssl, ic );
239	jd->fd = jd->ssl ? ssl_getfd( jd->ssl ) : -1;
240	}
241	else
242	{
243	jd->fd = proxy_connect( connect_to, srv ? srv->port : set_getint( &acc->set, "port" ), jabber_connected_plain, ic );
244	}
245	srv_free( srvl );
246
247	if( jd->fd == -1 )
248	{
249	imcb_error( ic, "Could not connect to server" );
250	imc_logout( ic, TRUE );
251
252	return;
253	}
254
255	if( set_getbool( &acc->set, "xmlconsole" ) )
256	{
257	jd->flags \|= JFLAG_XMLCONSOLE;
258	/* Shouldn't really do this at this stage already, maybe. But
259	I think this shouldn't break anything. */
260	imcb_add_buddy( ic, JABBER_XMLCONSOLE_HANDLE, NULL );
261	}
262
263	jabber_generate_id_hash( jd );
264	}
265
266	/* This generates an unfinished md5_state_t variable. Every time we generate
267	an ID, we finish the state by adding a sequence number and take the hash. */
268	static void jabber_generate_id_hash( struct jabber_data *jd )
269	{
270	md5_byte_t binbuf[4];
271	char *s;
272
273	md5_init( &jd->cached_id_prefix );
274	md5_append( &jd->cached_id_prefix, (unsigned char *) jd->username, strlen( jd->username ) );
275	md5_append( &jd->cached_id_prefix, (unsigned char *) jd->server, strlen( jd->server ) );
276	s = set_getstr( &jd->ic->acc->set, "resource" );
277	md5_append( &jd->cached_id_prefix, (unsigned char *) s, strlen( s ) );
278	random_bytes( binbuf, 4 );
279	md5_append( &jd->cached_id_prefix, binbuf, 4 );
280	}
281
282	static void jabber_logout( struct im_connection *ic )
283	{
284	struct jabber_data *jd = ic->proto_data;
285
286	while( jd->filetransfers )
287	imcb_file_canceled( ic, ( ( struct jabber_transfer *) jd->filetransfers->data )->ft, "Logging out" );
288
289	while( jd->streamhosts )
290	{
291	jabber_streamhost_t *sh = jd->streamhosts->data;
292	jd->streamhosts = g_slist_remove( jd->streamhosts, sh );
293	g_free( sh->jid );
294	g_free( sh->host );
295	g_free( sh );
296	}
297
298	if( jd->fd >= 0 )
299	jabber_end_stream( ic );
300
301	while( ic->groupchats )
302	jabber_chat_free( ic->groupchats->data );
303
304	if( jd->r_inpa >= 0 )
305	b_event_remove( jd->r_inpa );
306	if( jd->w_inpa >= 0 )
307	b_event_remove( jd->w_inpa );
308
309	if( jd->ssl )
310	ssl_disconnect( jd->ssl );
311	if( jd->fd >= 0 )
312	closesocket( jd->fd );
313
314	if( jd->tx_len )
315	g_free( jd->txq );
316
317	if( jd->node_cache )
318	g_hash_table_destroy( jd->node_cache );
319
320	jabber_buddy_remove_all( ic );
321
322	xt_free( jd->xt );
323
324	g_free( jd->away_message );
325	g_free( jd->username );
326	g_free( jd );
327
328	jabber_connections = g_slist_remove( jabber_connections, ic );
329	}
330
331	static int jabber_buddy_msg( struct im_connection ic, char who, char *message, int flags )
332	{
333	struct jabber_data *jd = ic->proto_data;
334	struct jabber_buddy *bud;
335	struct xt_node *node;
336	char *s;
337	int st;
338
339	if( g_strcasecmp( who, JABBER_XMLCONSOLE_HANDLE ) == 0 )
340	return jabber_write( ic, message, strlen( message ) );
341
342	if( g_strcasecmp( who, JABBER_MOCK_HANDLE ) == 0 )
343	{
344	/* Parse. */
345	if( xt_feed( jd->xt, message, strlen( message ) ) < 0 )
346	{
347	imcb_error( ic, "XML stream error" );
348	imc_logout( ic, TRUE );
349	return FALSE;
350	}
351
352	/* Execute all handlers. */
353	if( !xt_handle( jd->xt, NULL, 1 ) )
354	{
355	/* Don't do anything, the handlers should have
356	aborted the connection already. */
357	return FALSE;
358	}
359	}
360
361	if( ( s = strchr( who, '=' ) ) && jabber_chat_by_jid( ic, s + 1 ) )
362	bud = jabber_buddy_by_ext_jid( ic, who, 0 );
363	else
364	bud = jabber_buddy_by_jid( ic, who, GET_BUDDY_BARE_OK );
365
366	node = xt_new_node( "body", message, NULL );
367	node = jabber_make_packet( "message", "chat", bud ? bud->full_jid : who, node );
368
369	if( bud && ( jd->flags & JFLAG_WANT_TYPING ) &&
370	( ( bud->flags & JBFLAG_DOES_XEP85 ) \|\|
371	!( bud->flags & JBFLAG_PROBED_XEP85 ) ) )
372	{
373	struct xt_node *act;
374
375	/* If the user likes typing notification and if we don't know
376	(and didn't probe before) if this resource supports XEP85,
377	include a probe in this packet now. Also, if we know this
378	buddy does support XEP85, we have to send this <active/>
379	tag to tell that the user stopped typing (well, that's what
380	we guess when s/he pressed Enter...). */
381	act = xt_new_node( "active", NULL, NULL );
382	xt_add_attr( act, "xmlns", XMLNS_CHATSTATES );
383	xt_add_child( node, act );
384
385	/* Just make sure we do this only once. */
386	bud->flags \|= JBFLAG_PROBED_XEP85;
387	}
388
389	st = jabber_write_packet( ic, node );
390	xt_free_node( node );
391
392	return st;
393	}
394
395	static GList jabber_away_states( struct im_connection ic )
396	{
397	static GList *l = NULL;
398	int i;
399
400	if( l == NULL )
401	for( i = 0; jabber_away_state_list[i].full_name; i ++ )
402	l = g_list_append( l, (void*) jabber_away_state_list[i].full_name );
403
404	return l;
405	}
406
407	static void jabber_get_info( struct im_connection ic, char who )
408	{
409	struct jabber_buddy *bud;
410
411	bud = jabber_buddy_by_jid( ic, who, GET_BUDDY_FIRST );
412
413	while( bud )
414	{
415	imcb_log( ic, "Buddy %s (%d) information:", bud->full_jid, bud->priority );
416	if( bud->away_state )
417	imcb_log( ic, "Away state: %s", bud->away_state->full_name );
418	imcb_log( ic, "Status message: %s", bud->away_message ? bud->away_message : "(none)" );
419
420	bud = bud->next;
421	}
422
423	jabber_get_vcard( ic, bud ? bud->full_jid : who );
424	}
425
426	static void jabber_set_away( struct im_connection ic, char state_txt, char *message )
427	{
428	struct jabber_data *jd = ic->proto_data;
429
430	/* state_txt == NULL -> Not away.
431	Unknown state -> fall back to the first defined away state. */
432	if( state_txt == NULL )
433	jd->away_state = NULL;
434	else if( ( jd->away_state = jabber_away_state_by_name( state_txt ) ) == NULL )
435	jd->away_state = jabber_away_state_list;
436
437	g_free( jd->away_message );
438	jd->away_message = ( message && *message ) ? g_strdup( message ) : NULL;
439
440	presence_send_update( ic );
441	}
442
443	static void jabber_add_buddy( struct im_connection ic, char who, char *group )
444	{
445	struct jabber_data *jd = ic->proto_data;
446
447	if( g_strcasecmp( who, JABBER_XMLCONSOLE_HANDLE ) == 0 )
448	{
449	jd->flags \|= JFLAG_XMLCONSOLE;
450	imcb_add_buddy( ic, who, NULL );
451	return;
452	}
453	else if( g_strcasecmp( who, JABBER_MOCK_HANDLE ) == 0 )
454	{
455	jd->flags \|= JFLAG_MOCK;
456	imcb_add_buddy( ic, who, NULL );
457	return;
458	}
459
460	if( jabber_add_to_roster( ic, who, NULL, group ) )
461	presence_send_request( ic, who, "subscribe" );
462	}
463
464	static void jabber_remove_buddy( struct im_connection ic, char who, char *group )
465	{
466	struct jabber_data *jd = ic->proto_data;
467
468	if( g_strcasecmp( who, JABBER_XMLCONSOLE_HANDLE ) == 0 )
469	{
470	jd->flags &= ~JFLAG_XMLCONSOLE;
471	/* Not necessary for now. And for now the code isn't too
472	happy if the buddy is completely gone right after calling
473	this function already.
474	imcb_remove_buddy( ic, JABBER_XMLCONSOLE_HANDLE, NULL );
475	*/
476	return;
477	}
478	else if( g_strcasecmp( who, JABBER_MOCK_HANDLE ) == 0 )
479	{
480	jd->flags &= ~JFLAG_MOCK;
481	return;
482	}
483
484	/* We should always do this part. Clean up our administration a little bit. */
485	jabber_buddy_remove_bare( ic, who );
486
487	if( jabber_remove_from_roster( ic, who ) )
488	presence_send_request( ic, who, "unsubscribe" );
489	}
490
491	static struct groupchat jabber_chat_join_( struct im_connection ic, const char room, const char nick, const char password, set_t *sets )
492	{
493	if( strchr( room, '@' ) == NULL )
494	imcb_error( ic, "Invalid room name: %s", room );
495	else if( jabber_chat_by_jid( ic, room ) )
496	imcb_error( ic, "Already present in chat `%s'", room );
497	else
498	return jabber_chat_join( ic, room, nick, set_getstr( sets, "password" ) );
499
500	return NULL;
501	}
502
503	static void jabber_chat_msg_( struct groupchat c, char message, int flags )
504	{
505	if( c && message )
506	jabber_chat_msg( c, message, flags );
507	}
508
509	static void jabber_chat_topic_( struct groupchat c, char topic )
510	{
511	if( c && topic )
512	jabber_chat_topic( c, topic );
513	}
514
515	static void jabber_chat_leave_( struct groupchat *c )
516	{
517	if( c )
518	jabber_chat_leave( c, NULL );
519	}
520
521	static void jabber_chat_invite_( struct groupchat c, char who, char *msg )
522	{
523	struct jabber_chat *jc = c->data;
524	gchar *msg_alt = NULL;
525
526	if( msg == NULL )
527	msg_alt = g_strdup_printf( "%s invited you to %s", c->ic->acc->user, jc->name );
528
529	if( c && who )
530	jabber_chat_invite( c, who, msg ? msg : msg_alt );
531
532	g_free( msg_alt );
533	}
534
535	static void jabber_keepalive( struct im_connection *ic )
536	{
537	/* Just any whitespace character is enough as a keepalive for XMPP sessions. */
538	if( !jabber_write( ic, "\n", 1 ) )
539	return;
540
541	/* This runs the garbage collection every minute, which means every packet
542	is in the cache for about a minute (which should be enough AFAIK). */
543	jabber_cache_clean( ic );
544	}
545
546	static int jabber_send_typing( struct im_connection ic, char who, int typing )
547	{
548	struct jabber_data *jd = ic->proto_data;
549	struct jabber_buddy *bud;
550
551	/* Enable typing notification related code from now. */
552	jd->flags \|= JFLAG_WANT_TYPING;
553
554	if( ( bud = jabber_buddy_by_jid( ic, who, 0 ) ) == NULL )
555	{
556	/* Sending typing notifications to unknown buddies is
557	unsupported for now. Shouldn't be a problem, I think. */
558	return 0;
559	}
560
561	if( bud->flags & JBFLAG_DOES_XEP85 )
562	{
563	/* We're only allowed to send this stuff if we know the other
564	side supports it. */
565
566	struct xt_node *node;
567	char *type;
568	int st;
569
570	if( typing & OPT_TYPING )
571	type = "composing";
572	else if( typing & OPT_THINKING )
573	type = "paused";
574	else
575	type = "active";
576
577	node = xt_new_node( type, NULL, NULL );
578	xt_add_attr( node, "xmlns", XMLNS_CHATSTATES );
579	node = jabber_make_packet( "message", "chat", bud->full_jid, node );
580
581	st = jabber_write_packet( ic, node );
582	xt_free_node( node );
583
584	return st;
585	}
586
587	return 1;
588	}
589
590	void jabber_chat_add_settings( account_t acc, set_t *head )
591	{
592	/* Meh. Stupid room passwords. Not trying to obfuscate/hide
593	them from the user for now. */
594	set_add( head, "password", NULL, NULL, NULL );
595	}
596
597	void jabber_chat_free_settings( account_t acc, set_t *head )
598	{
599	set_del( head, "password" );
600	}
601
602	GList jabber_buddy_action_list( bee_user_t bu )
603	{
604	static GList *ret = NULL;
605
606	if( ret == NULL )
607	{
608	static const struct buddy_action ba[2] = {
609	{ "VERSION", "Get client (version) information" },
610	};
611
612	ret = g_list_prepend( ret, (void*) ba + 0 );
613	}
614
615	return ret;
616	}
617
618	void jabber_buddy_action( struct bee_user bu, const char action, char const args[], void *data )
619	{
620	if( g_strcasecmp( action, "VERSION" ) == 0 )
621	{
622	struct jabber_buddy *bud;
623
624	if( ( bud = jabber_buddy_by_ext_jid( bu->ic, bu->handle, 0 ) ) == NULL )
625	bud = jabber_buddy_by_jid( bu->ic, bu->handle, GET_BUDDY_FIRST );
626	for( ; bud; bud = bud->next )
627	jabber_iq_version_send( bu->ic, bud, data );
628	}
629
630	return NULL;
631	}
632
633	void jabber_initmodule()
634	{
635	struct prpl *ret = g_new0( struct prpl, 1 );
636
637	ret->name = "jabber";
638	ret->mms = 0; /* no limit */
639	ret->login = jabber_login;
640	ret->init = jabber_init;
641	ret->logout = jabber_logout;
642	ret->buddy_msg = jabber_buddy_msg;
643	ret->away_states = jabber_away_states;
644	ret->set_away = jabber_set_away;
645	// ret->set_info = jabber_set_info;
646	ret->get_info = jabber_get_info;
647	ret->add_buddy = jabber_add_buddy;
648	ret->remove_buddy = jabber_remove_buddy;
649	ret->chat_msg = jabber_chat_msg_;
650	ret->chat_topic = jabber_chat_topic_;
651	ret->chat_invite = jabber_chat_invite_;
652	ret->chat_leave = jabber_chat_leave_;
653	ret->chat_join = jabber_chat_join_;
654	ret->chat_add_settings = jabber_chat_add_settings;
655	ret->chat_free_settings = jabber_chat_free_settings;
656	ret->keepalive = jabber_keepalive;
657	ret->send_typing = jabber_send_typing;
658	ret->handle_cmp = g_strcasecmp;
659	ret->transfer_request = jabber_si_transfer_request;
660	ret->buddy_action_list = jabber_buddy_action_list;
661	ret->buddy_action = jabber_buddy_action;
662
663	register_protocol( ret );
664	}

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