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source: protocols/jabber/jabber.c @ 83f1bd1d

Last change on this file since 83f1bd1d was a97a336, checked in by Wilmer van der Gaast <wilmer@…>, at 2010-12-07T23:14:30Z
Add CTCP HELP code. Also cleaning up some noop handlers in the Twitter module (chat_with and send_typing) that suggested support for features that obviously don't exist.
Property mode set to `100644`
File size: 17.4 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, "user_agent", "BitlBee", NULL, acc );
85
86	s = set_add( &acc->set, "xmlconsole", "false", set_eval_bool, acc );
87	s->flags \|= ACC_SET_OFFLINE_ONLY;
88
89	acc->flags \|= ACC_FLAG_AWAY_MESSAGE \| ACC_FLAG_STATUS_MESSAGE;
90	}
91
92	static void jabber_generate_id_hash( struct jabber_data *jd );
93
94	static void jabber_login( account_t *acc )
95	{
96	struct im_connection *ic = imcb_new( acc );
97	struct jabber_data *jd = g_new0( struct jabber_data, 1 );
98	struct ns_srv_reply *srvl = NULL, srv = NULL;
99	char connect_to, s;
100	int i;
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	/* This code isn't really pretty. Backwards compatibility never is... */
138	s = acc->server;
139	while( s )
140	{
141	static int had_port = 0;
142
143	if( strncmp( s, "ssl", 3 ) == 0 )
144	{
145	set_setstr( &acc->set, "ssl", "true" );
146
147	/* Flush this part so that (if this was the first
148	part of the server string) acc->server gets
149	flushed. We don't want to have to do this another
150	time. :-) */
151	*s = 0;
152	s ++;
153
154	/* Only set this if the user didn't specify a custom
155	port number already... */
156	if( !had_port )
157	set_setint( &acc->set, "port", 5223 );
158	}
159	else if( isdigit( *s ) )
160	{
161	int i;
162
163	/* The first character is a digit. It could be an
164	IP address though. Only accept this as a port#
165	if there are only digits. */
166	for( i = 0; isdigit( s[i] ); i ++ );
167
168	/* If the first non-digit character is a colon or
169	the end of the string, save the port number
170	where it should be. */
171	if( s[i] == ':' \|\| s[i] == 0 )
172	{
173	sscanf( s, "%d", &i );
174	set_setint( &acc->set, "port", i );
175
176	/* See above. */
177	*s = 0;
178	s ++;
179	}
180
181	had_port = 1;
182	}
183
184	s = strchr( s, ':' );
185	if( s )
186	{
187	*s = 0;
188	s ++;
189	}
190	}
191
192	jd->node_cache = g_hash_table_new_full( g_str_hash, g_str_equal, NULL, jabber_cache_entry_free );
193	jd->buddies = g_hash_table_new( g_str_hash, g_str_equal );
194
195	/* Figure out the hostname to connect to. */
196	if( acc->server && *acc->server )
197	connect_to = acc->server;
198	else if( ( srvl = srv_lookup( "xmpp-client", "tcp", jd->server ) ) \|\|
199	( srvl = srv_lookup( "jabber-client", "tcp", jd->server ) ) )
200	{
201	/* Find the lowest-priority one. These usually come
202	back in random/shuffled order. Not looking at
203	weights etc for now. */
204	srv = *srvl;
205	for( i = 1; srvl[i]; i ++ )
206	if( srvl[i]->prio < srv->prio )
207	srv = srvl[i];
208
209	connect_to = srv->name;
210	}
211	else
212	connect_to = jd->server;
213
214	imcb_log( ic, "Connecting" );
215
216	for( i = 0; jabber_port_list[i] > 0; i ++ )
217	if( set_getint( &acc->set, "port" ) == jabber_port_list[i] )
218	break;
219
220	if( jabber_port_list[i] == 0 )
221	{
222	imcb_log( ic, "Illegal port number" );
223	imc_logout( ic, FALSE );
224	return;
225	}
226
227	/* For non-SSL connections we can try to use the port # from the SRV
228	reply, but let's not do that when using SSL, SSL usually runs on
229	non-standard ports... */
230	if( set_getbool( &acc->set, "ssl" ) )
231	{
232	jd->ssl = ssl_connect( connect_to, set_getint( &acc->set, "port" ), jabber_connected_ssl, ic );
233	jd->fd = jd->ssl ? ssl_getfd( jd->ssl ) : -1;
234	}
235	else
236	{
237	jd->fd = proxy_connect( connect_to, srv ? srv->port : set_getint( &acc->set, "port" ), jabber_connected_plain, ic );
238	}
239	srv_free( srvl );
240
241	if( jd->fd == -1 )
242	{
243	imcb_error( ic, "Could not connect to server" );
244	imc_logout( ic, TRUE );
245
246	return;
247	}
248
249	if( set_getbool( &acc->set, "xmlconsole" ) )
250	{
251	jd->flags \|= JFLAG_XMLCONSOLE;
252	/* Shouldn't really do this at this stage already, maybe. But
253	I think this shouldn't break anything. */
254	imcb_add_buddy( ic, JABBER_XMLCONSOLE_HANDLE, NULL );
255	}
256
257	jabber_generate_id_hash( jd );
258	}
259
260	/* This generates an unfinished md5_state_t variable. Every time we generate
261	an ID, we finish the state by adding a sequence number and take the hash. */
262	static void jabber_generate_id_hash( struct jabber_data *jd )
263	{
264	md5_byte_t binbuf[4];
265	char *s;
266
267	md5_init( &jd->cached_id_prefix );
268	md5_append( &jd->cached_id_prefix, (unsigned char *) jd->username, strlen( jd->username ) );
269	md5_append( &jd->cached_id_prefix, (unsigned char *) jd->server, strlen( jd->server ) );
270	s = set_getstr( &jd->ic->acc->set, "resource" );
271	md5_append( &jd->cached_id_prefix, (unsigned char *) s, strlen( s ) );
272	random_bytes( binbuf, 4 );
273	md5_append( &jd->cached_id_prefix, binbuf, 4 );
274	}
275
276	static void jabber_logout( struct im_connection *ic )
277	{
278	struct jabber_data *jd = ic->proto_data;
279
280	while( jd->filetransfers )
281	imcb_file_canceled( ic, ( ( struct jabber_transfer *) jd->filetransfers->data )->ft, "Logging out" );
282
283	while( jd->streamhosts )
284	{
285	jabber_streamhost_t *sh = jd->streamhosts->data;
286	jd->streamhosts = g_slist_remove( jd->streamhosts, sh );
287	g_free( sh->jid );
288	g_free( sh->host );
289	g_free( sh );
290	}
291
292	if( jd->fd >= 0 )
293	jabber_end_stream( ic );
294
295	while( ic->groupchats )
296	jabber_chat_free( ic->groupchats->data );
297
298	if( jd->r_inpa >= 0 )
299	b_event_remove( jd->r_inpa );
300	if( jd->w_inpa >= 0 )
301	b_event_remove( jd->w_inpa );
302
303	if( jd->ssl )
304	ssl_disconnect( jd->ssl );
305	if( jd->fd >= 0 )
306	closesocket( jd->fd );
307
308	if( jd->tx_len )
309	g_free( jd->txq );
310
311	if( jd->node_cache )
312	g_hash_table_destroy( jd->node_cache );
313
314	jabber_buddy_remove_all( ic );
315
316	xt_free( jd->xt );
317
318	g_free( jd->away_message );
319	g_free( jd->username );
320	g_free( jd );
321
322	jabber_connections = g_slist_remove( jabber_connections, ic );
323	}
324
325	static int jabber_buddy_msg( struct im_connection ic, char who, char *message, int flags )
326	{
327	struct jabber_data *jd = ic->proto_data;
328	struct jabber_buddy *bud;
329	struct xt_node *node;
330	char *s;
331	int st;
332
333	if( g_strcasecmp( who, JABBER_XMLCONSOLE_HANDLE ) == 0 )
334	return jabber_write( ic, message, strlen( message ) );
335
336	if( ( s = strchr( who, '=' ) ) && jabber_chat_by_jid( ic, s + 1 ) )
337	bud = jabber_buddy_by_ext_jid( ic, who, 0 );
338	else
339	bud = jabber_buddy_by_jid( ic, who, GET_BUDDY_BARE_OK );
340
341	node = xt_new_node( "body", message, NULL );
342	node = jabber_make_packet( "message", "chat", bud ? bud->full_jid : who, node );
343
344	if( bud && ( jd->flags & JFLAG_WANT_TYPING ) &&
345	( ( bud->flags & JBFLAG_DOES_XEP85 ) \|\|
346	!( bud->flags & JBFLAG_PROBED_XEP85 ) ) )
347	{
348	struct xt_node *act;
349
350	/* If the user likes typing notification and if we don't know
351	(and didn't probe before) if this resource supports XEP85,
352	include a probe in this packet now. Also, if we know this
353	buddy does support XEP85, we have to send this <active/>
354	tag to tell that the user stopped typing (well, that's what
355	we guess when s/he pressed Enter...). */
356	act = xt_new_node( "active", NULL, NULL );
357	xt_add_attr( act, "xmlns", XMLNS_CHATSTATES );
358	xt_add_child( node, act );
359
360	/* Just make sure we do this only once. */
361	bud->flags \|= JBFLAG_PROBED_XEP85;
362	}
363
364	st = jabber_write_packet( ic, node );
365	xt_free_node( node );
366
367	return st;
368	}
369
370	static GList jabber_away_states( struct im_connection ic )
371	{
372	static GList *l = NULL;
373	int i;
374
375	if( l == NULL )
376	for( i = 0; jabber_away_state_list[i].full_name; i ++ )
377	l = g_list_append( l, (void*) jabber_away_state_list[i].full_name );
378
379	return l;
380	}
381
382	static void jabber_get_info( struct im_connection ic, char who )
383	{
384	struct jabber_buddy *bud;
385
386	bud = jabber_buddy_by_jid( ic, who, GET_BUDDY_FIRST );
387
388	while( bud )
389	{
390	imcb_log( ic, "Buddy %s (%d) information:", bud->full_jid, bud->priority );
391	if( bud->away_state )
392	imcb_log( ic, "Away state: %s", bud->away_state->full_name );
393	imcb_log( ic, "Status message: %s", bud->away_message ? bud->away_message : "(none)" );
394
395	bud = bud->next;
396	}
397
398	jabber_get_vcard( ic, bud ? bud->full_jid : who );
399	}
400
401	static void jabber_set_away( struct im_connection ic, char state_txt, char *message )
402	{
403	struct jabber_data *jd = ic->proto_data;
404
405	/* state_txt == NULL -> Not away.
406	Unknown state -> fall back to the first defined away state. */
407	if( state_txt == NULL )
408	jd->away_state = NULL;
409	else if( ( jd->away_state = jabber_away_state_by_name( state_txt ) ) == NULL )
410	jd->away_state = jabber_away_state_list;
411
412	g_free( jd->away_message );
413	jd->away_message = ( message && *message ) ? g_strdup( message ) : NULL;
414
415	presence_send_update( ic );
416	}
417
418	static void jabber_add_buddy( struct im_connection ic, char who, char *group )
419	{
420	struct jabber_data *jd = ic->proto_data;
421
422	if( g_strcasecmp( who, JABBER_XMLCONSOLE_HANDLE ) == 0 )
423	{
424	jd->flags \|= JFLAG_XMLCONSOLE;
425	imcb_add_buddy( ic, JABBER_XMLCONSOLE_HANDLE, NULL );
426	return;
427	}
428
429	if( jabber_add_to_roster( ic, who, NULL, group ) )
430	presence_send_request( ic, who, "subscribe" );
431	}
432
433	static void jabber_remove_buddy( struct im_connection ic, char who, char *group )
434	{
435	struct jabber_data *jd = ic->proto_data;
436
437	if( g_strcasecmp( who, JABBER_XMLCONSOLE_HANDLE ) == 0 )
438	{
439	jd->flags &= ~JFLAG_XMLCONSOLE;
440	/* Not necessary for now. And for now the code isn't too
441	happy if the buddy is completely gone right after calling
442	this function already.
443	imcb_remove_buddy( ic, JABBER_XMLCONSOLE_HANDLE, NULL );
444	*/
445	return;
446	}
447
448	/* We should always do this part. Clean up our administration a little bit. */
449	jabber_buddy_remove_bare( ic, who );
450
451	if( jabber_remove_from_roster( ic, who ) )
452	presence_send_request( ic, who, "unsubscribe" );
453	}
454
455	static struct groupchat jabber_chat_join_( struct im_connection ic, const char room, const char nick, const char password, set_t *sets )
456	{
457	if( strchr( room, '@' ) == NULL )
458	imcb_error( ic, "Invalid room name: %s", room );
459	else if( jabber_chat_by_jid( ic, room ) )
460	imcb_error( ic, "Already present in chat `%s'", room );
461	else
462	return jabber_chat_join( ic, room, nick, set_getstr( sets, "password" ) );
463
464	return NULL;
465	}
466
467	static void jabber_chat_msg_( struct groupchat c, char message, int flags )
468	{
469	if( c && message )
470	jabber_chat_msg( c, message, flags );
471	}
472
473	static void jabber_chat_topic_( struct groupchat c, char topic )
474	{
475	if( c && topic )
476	jabber_chat_topic( c, topic );
477	}
478
479	static void jabber_chat_leave_( struct groupchat *c )
480	{
481	if( c )
482	jabber_chat_leave( c, NULL );
483	}
484
485	static void jabber_chat_invite_( struct groupchat c, char who, char *msg )
486	{
487	struct jabber_chat *jc = c->data;
488	gchar *msg_alt = NULL;
489
490	if( msg == NULL )
491	msg_alt = g_strdup_printf( "%s invited you to %s", c->ic->acc->user, jc->name );
492
493	if( c && who )
494	jabber_chat_invite( c, who, msg ? msg : msg_alt );
495
496	g_free( msg_alt );
497	}
498
499	static void jabber_keepalive( struct im_connection *ic )
500	{
501	/* Just any whitespace character is enough as a keepalive for XMPP sessions. */
502	if( !jabber_write( ic, "\n", 1 ) )
503	return;
504
505	/* This runs the garbage collection every minute, which means every packet
506	is in the cache for about a minute (which should be enough AFAIK). */
507	jabber_cache_clean( ic );
508	}
509
510	static int jabber_send_typing( struct im_connection ic, char who, int typing )
511	{
512	struct jabber_data *jd = ic->proto_data;
513	struct jabber_buddy *bud;
514
515	/* Enable typing notification related code from now. */
516	jd->flags \|= JFLAG_WANT_TYPING;
517
518	if( ( bud = jabber_buddy_by_jid( ic, who, 0 ) ) == NULL )
519	{
520	/* Sending typing notifications to unknown buddies is
521	unsupported for now. Shouldn't be a problem, I think. */
522	return 0;
523	}
524
525	if( bud->flags & JBFLAG_DOES_XEP85 )
526	{
527	/* We're only allowed to send this stuff if we know the other
528	side supports it. */
529
530	struct xt_node *node;
531	char *type;
532	int st;
533
534	if( typing & OPT_TYPING )
535	type = "composing";
536	else if( typing & OPT_THINKING )
537	type = "paused";
538	else
539	type = "active";
540
541	node = xt_new_node( type, NULL, NULL );
542	xt_add_attr( node, "xmlns", XMLNS_CHATSTATES );
543	node = jabber_make_packet( "message", "chat", bud->full_jid, node );
544
545	st = jabber_write_packet( ic, node );
546	xt_free_node( node );
547
548	return st;
549	}
550
551	return 1;
552	}
553
554	void jabber_chat_add_settings( account_t acc, set_t *head )
555	{
556	/* Meh. Stupid room passwords. Not trying to obfuscate/hide
557	them from the user for now. */
558	set_add( head, "password", NULL, NULL, NULL );
559	}
560
561	void jabber_chat_free_settings( account_t acc, set_t *head )
562	{
563	set_del( head, "password" );
564	}
565
566	GList jabber_buddy_action_list( bee_user_t bu )
567	{
568	static GList *ret = NULL;
569
570	if( ret == NULL )
571	{
572	static const struct buddy_action ba[2] = {
573	{ "VERSION", "Get client (version) information" },
574	};
575
576	ret = g_list_prepend( ret, (void*) ba + 0 );
577	}
578
579	return ret;
580	}
581
582	void jabber_buddy_action( struct bee_user bu, const char action, char const args[], void *data )
583	{
584	if( g_strcasecmp( action, "VERSION" ) == 0 )
585	{
586	struct jabber_buddy *bud;
587
588	if( ( bud = jabber_buddy_by_ext_jid( bu->ic, bu->handle, 0 ) ) == NULL )
589	bud = jabber_buddy_by_jid( bu->ic, bu->handle, GET_BUDDY_FIRST );
590	for( ; bud; bud = bud->next )
591	jabber_iq_version_send( bu->ic, bud, data );
592	}
593
594	return NULL;
595	}
596
597	void jabber_initmodule()
598	{
599	struct prpl *ret = g_new0( struct prpl, 1 );
600
601	ret->name = "jabber";
602	ret->mms = 0; /* no limit */
603	ret->login = jabber_login;
604	ret->init = jabber_init;
605	ret->logout = jabber_logout;
606	ret->buddy_msg = jabber_buddy_msg;
607	ret->away_states = jabber_away_states;
608	ret->set_away = jabber_set_away;
609	// ret->set_info = jabber_set_info;
610	ret->get_info = jabber_get_info;
611	ret->add_buddy = jabber_add_buddy;
612	ret->remove_buddy = jabber_remove_buddy;
613	ret->chat_msg = jabber_chat_msg_;
614	ret->chat_topic = jabber_chat_topic_;
615	ret->chat_invite = jabber_chat_invite_;
616	ret->chat_leave = jabber_chat_leave_;
617	ret->chat_join = jabber_chat_join_;
618	ret->chat_add_settings = jabber_chat_add_settings;
619	ret->chat_free_settings = jabber_chat_free_settings;
620	ret->keepalive = jabber_keepalive;
621	ret->send_typing = jabber_send_typing;
622	ret->handle_cmp = g_strcasecmp;
623	ret->transfer_request = jabber_si_transfer_request;
624	ret->buddy_action_list = jabber_buddy_action_list;
625	ret->buddy_action = jabber_buddy_action;
626
627	register_protocol( ret );
628	}

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