Context Navigation

source: protocols/jabber/jabber.c @ d6ddff0

Last change on this file since d6ddff0 was ad46e4d, checked in by Wilmer van der Gaast <wilmer@…>, at 2011-12-22T11:23:18Z
Use initgroups() as well when dropping privileges. Closes bug #852.
Property mode set to `100644`
File size: 18.1 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, "sasl", "true", set_eval_bool, acc );
85	s->flags \|= ACC_SET_OFFLINE_ONLY \| SET_HIDDEN_DEFAULT;
86
87	s = set_add( &acc->set, "user_agent", "BitlBee", NULL, acc );
88
89	s = set_add( &acc->set, "xmlconsole", "false", set_eval_bool, acc );
90	s->flags \|= ACC_SET_OFFLINE_ONLY;
91
92	acc->flags \|= ACC_FLAG_AWAY_MESSAGE \| ACC_FLAG_STATUS_MESSAGE;
93	}
94
95	static void jabber_generate_id_hash( struct jabber_data *jd );
96
97	static void jabber_login( account_t *acc )
98	{
99	struct im_connection *ic = imcb_new( acc );
100	struct jabber_data *jd = g_new0( struct jabber_data, 1 );
101	struct ns_srv_reply *srvl = NULL, srv = NULL;
102	char connect_to, s;
103	int i;
104
105	/* For now this is needed in the _connected() handlers if using
106	GLib event handling, to make sure we're not handling events
107	on dead connections. */
108	jabber_connections = g_slist_prepend( jabber_connections, ic );
109
110	jd->ic = ic;
111	ic->proto_data = jd;
112
113	jd->username = g_strdup( acc->user );
114	jd->server = strchr( jd->username, '@' );
115
116	jd->fd = jd->r_inpa = jd->w_inpa = -1;
117
118	if( jd->server == NULL )
119	{
120	imcb_error( ic, "Incomplete account name (format it like <username@jabberserver.name>)" );
121	imc_logout( ic, FALSE );
122	return;
123	}
124
125	/* So don't think of free()ing jd->server.. :-) */
126	*jd->server = 0;
127	jd->server ++;
128
129	if( ( s = strchr( jd->server, '/' ) ) )
130	{
131	*s = 0;
132	set_setstr( &acc->set, "resource", s + 1 );
133
134	/* Also remove the /resource from the original variable so we
135	won't have to do this again every time. */
136	s = strchr( acc->user, '/' );
137	*s = 0;
138	}
139
140	/* This code isn't really pretty. Backwards compatibility never is... */
141	s = acc->server;
142	while( s )
143	{
144	static int had_port = 0;
145
146	if( strncmp( s, "ssl", 3 ) == 0 )
147	{
148	set_setstr( &acc->set, "ssl", "true" );
149
150	/* Flush this part so that (if this was the first
151	part of the server string) acc->server gets
152	flushed. We don't want to have to do this another
153	time. :-) */
154	*s = 0;
155	s ++;
156
157	/* Only set this if the user didn't specify a custom
158	port number already... */
159	if( !had_port )
160	set_setint( &acc->set, "port", 5223 );
161	}
162	else if( isdigit( *s ) )
163	{
164	int i;
165
166	/* The first character is a digit. It could be an
167	IP address though. Only accept this as a port#
168	if there are only digits. */
169	for( i = 0; isdigit( s[i] ); i ++ );
170
171	/* If the first non-digit character is a colon or
172	the end of the string, save the port number
173	where it should be. */
174	if( s[i] == ':' \|\| s[i] == 0 )
175	{
176	sscanf( s, "%d", &i );
177	set_setint( &acc->set, "port", i );
178
179	/* See above. */
180	*s = 0;
181	s ++;
182	}
183
184	had_port = 1;
185	}
186
187	s = strchr( s, ':' );
188	if( s )
189	{
190	*s = 0;
191	s ++;
192	}
193	}
194
195	jd->node_cache = g_hash_table_new_full( g_str_hash, g_str_equal, NULL, jabber_cache_entry_free );
196	jd->buddies = g_hash_table_new( g_str_hash, g_str_equal );
197
198	/* Figure out the hostname to connect to. */
199	if( acc->server && *acc->server )
200	connect_to = acc->server;
201	else if( ( srvl = srv_lookup( "xmpp-client", "tcp", jd->server ) ) \|\|
202	( srvl = srv_lookup( "jabber-client", "tcp", jd->server ) ) )
203	{
204	/* Find the lowest-priority one. These usually come
205	back in random/shuffled order. Not looking at
206	weights etc for now. */
207	srv = *srvl;
208	for( i = 1; srvl[i]; i ++ )
209	if( srvl[i]->prio < srv->prio )
210	srv = srvl[i];
211
212	connect_to = srv->name;
213	}
214	else
215	connect_to = jd->server;
216
217	imcb_log( ic, "Connecting" );
218
219	for( i = 0; jabber_port_list[i] > 0; i ++ )
220	if( set_getint( &acc->set, "port" ) == jabber_port_list[i] )
221	break;
222
223	if( jabber_port_list[i] == 0 )
224	{
225	imcb_log( ic, "Illegal port number" );
226	imc_logout( ic, FALSE );
227	return;
228	}
229
230	/* For non-SSL connections we can try to use the port # from the SRV
231	reply, but let's not do that when using SSL, SSL usually runs on
232	non-standard ports... */
233	if( set_getbool( &acc->set, "ssl" ) )
234	{
235	jd->ssl = ssl_connect( connect_to, set_getint( &acc->set, "port" ), jabber_connected_ssl, ic );
236	jd->fd = jd->ssl ? ssl_getfd( jd->ssl ) : -1;
237	}
238	else
239	{
240	jd->fd = proxy_connect( connect_to, srv ? srv->port : set_getint( &acc->set, "port" ), jabber_connected_plain, ic );
241	}
242	srv_free( srvl );
243
244	if( jd->fd == -1 )
245	{
246	imcb_error( ic, "Could not connect to server" );
247	imc_logout( ic, TRUE );
248
249	return;
250	}
251
252	if( set_getbool( &acc->set, "xmlconsole" ) )
253	{
254	jd->flags \|= JFLAG_XMLCONSOLE;
255	/* Shouldn't really do this at this stage already, maybe. But
256	I think this shouldn't break anything. */
257	imcb_add_buddy( ic, JABBER_XMLCONSOLE_HANDLE, NULL );
258	}
259
260	jabber_generate_id_hash( jd );
261	}
262
263	/* This generates an unfinished md5_state_t variable. Every time we generate
264	an ID, we finish the state by adding a sequence number and take the hash. */
265	static void jabber_generate_id_hash( struct jabber_data *jd )
266	{
267	md5_byte_t binbuf[4];
268	char *s;
269
270	md5_init( &jd->cached_id_prefix );
271	md5_append( &jd->cached_id_prefix, (unsigned char *) jd->username, strlen( jd->username ) );
272	md5_append( &jd->cached_id_prefix, (unsigned char *) jd->server, strlen( jd->server ) );
273	s = set_getstr( &jd->ic->acc->set, "resource" );
274	md5_append( &jd->cached_id_prefix, (unsigned char *) s, strlen( s ) );
275	random_bytes( binbuf, 4 );
276	md5_append( &jd->cached_id_prefix, binbuf, 4 );
277	}
278
279	static void jabber_logout( struct im_connection *ic )
280	{
281	struct jabber_data *jd = ic->proto_data;
282
283	while( jd->filetransfers )
284	imcb_file_canceled( ic, ( ( struct jabber_transfer *) jd->filetransfers->data )->ft, "Logging out" );
285
286	while( jd->streamhosts )
287	{
288	jabber_streamhost_t *sh = jd->streamhosts->data;
289	jd->streamhosts = g_slist_remove( jd->streamhosts, sh );
290	g_free( sh->jid );
291	g_free( sh->host );
292	g_free( sh );
293	}
294
295	if( jd->fd >= 0 )
296	jabber_end_stream( ic );
297
298	while( ic->groupchats )
299	jabber_chat_free( ic->groupchats->data );
300
301	if( jd->r_inpa >= 0 )
302	b_event_remove( jd->r_inpa );
303	if( jd->w_inpa >= 0 )
304	b_event_remove( jd->w_inpa );
305
306	if( jd->ssl )
307	ssl_disconnect( jd->ssl );
308	if( jd->fd >= 0 )
309	closesocket( jd->fd );
310
311	if( jd->tx_len )
312	g_free( jd->txq );
313
314	if( jd->node_cache )
315	g_hash_table_destroy( jd->node_cache );
316
317	jabber_buddy_remove_all( ic );
318
319	xt_free( jd->xt );
320
321	g_free( jd->away_message );
322	g_free( jd->username );
323	g_free( jd );
324
325	jabber_connections = g_slist_remove( jabber_connections, ic );
326	}
327
328	static int jabber_buddy_msg( struct im_connection ic, char who, char *message, int flags )
329	{
330	struct jabber_data *jd = ic->proto_data;
331	struct jabber_buddy *bud;
332	struct xt_node *node;
333	char *s;
334	int st;
335
336	if( g_strcasecmp( who, JABBER_XMLCONSOLE_HANDLE ) == 0 )
337	return jabber_write( ic, message, strlen( message ) );
338
339	if( g_strcasecmp( who, JABBER_MOCK_HANDLE ) == 0 )
340	{
341	/* Parse. */
342	if( xt_feed( jd->xt, message, strlen( message ) ) < 0 )
343	{
344	imcb_error( ic, "XML stream error" );
345	imc_logout( ic, TRUE );
346	return FALSE;
347	}
348
349	/* Execute all handlers. */
350	if( !xt_handle( jd->xt, NULL, 1 ) )
351	{
352	/* Don't do anything, the handlers should have
353	aborted the connection already. */
354	return FALSE;
355	}
356	}
357
358	if( ( s = strchr( who, '=' ) ) && jabber_chat_by_jid( ic, s + 1 ) )
359	bud = jabber_buddy_by_ext_jid( ic, who, 0 );
360	else
361	bud = jabber_buddy_by_jid( ic, who, GET_BUDDY_BARE_OK );
362
363	node = xt_new_node( "body", message, NULL );
364	node = jabber_make_packet( "message", "chat", bud ? bud->full_jid : who, node );
365
366	if( bud && ( jd->flags & JFLAG_WANT_TYPING ) &&
367	( ( bud->flags & JBFLAG_DOES_XEP85 ) \|\|
368	!( bud->flags & JBFLAG_PROBED_XEP85 ) ) )
369	{
370	struct xt_node *act;
371
372	/* If the user likes typing notification and if we don't know
373	(and didn't probe before) if this resource supports XEP85,
374	include a probe in this packet now. Also, if we know this
375	buddy does support XEP85, we have to send this <active/>
376	tag to tell that the user stopped typing (well, that's what
377	we guess when s/he pressed Enter...). */
378	act = xt_new_node( "active", NULL, NULL );
379	xt_add_attr( act, "xmlns", XMLNS_CHATSTATES );
380	xt_add_child( node, act );
381
382	/* Just make sure we do this only once. */
383	bud->flags \|= JBFLAG_PROBED_XEP85;
384	}
385
386	st = jabber_write_packet( ic, node );
387	xt_free_node( node );
388
389	return st;
390	}
391
392	static GList jabber_away_states( struct im_connection ic )
393	{
394	static GList *l = NULL;
395	int i;
396
397	if( l == NULL )
398	for( i = 0; jabber_away_state_list[i].full_name; i ++ )
399	l = g_list_append( l, (void*) jabber_away_state_list[i].full_name );
400
401	return l;
402	}
403
404	static void jabber_get_info( struct im_connection ic, char who )
405	{
406	struct jabber_buddy *bud;
407
408	bud = jabber_buddy_by_jid( ic, who, GET_BUDDY_FIRST );
409
410	while( bud )
411	{
412	imcb_log( ic, "Buddy %s (%d) information:", bud->full_jid, bud->priority );
413	if( bud->away_state )
414	imcb_log( ic, "Away state: %s", bud->away_state->full_name );
415	imcb_log( ic, "Status message: %s", bud->away_message ? bud->away_message : "(none)" );
416
417	bud = bud->next;
418	}
419
420	jabber_get_vcard( ic, bud ? bud->full_jid : who );
421	}
422
423	static void jabber_set_away( struct im_connection ic, char state_txt, char *message )
424	{
425	struct jabber_data *jd = ic->proto_data;
426
427	/* state_txt == NULL -> Not away.
428	Unknown state -> fall back to the first defined away state. */
429	if( state_txt == NULL )
430	jd->away_state = NULL;
431	else if( ( jd->away_state = jabber_away_state_by_name( state_txt ) ) == NULL )
432	jd->away_state = jabber_away_state_list;
433
434	g_free( jd->away_message );
435	jd->away_message = ( message && *message ) ? g_strdup( message ) : NULL;
436
437	presence_send_update( ic );
438	}
439
440	static void jabber_add_buddy( struct im_connection ic, char who, char *group )
441	{
442	struct jabber_data *jd = ic->proto_data;
443
444	if( g_strcasecmp( who, JABBER_XMLCONSOLE_HANDLE ) == 0 )
445	{
446	jd->flags \|= JFLAG_XMLCONSOLE;
447	imcb_add_buddy( ic, who, NULL );
448	return;
449	}
450	else if( g_strcasecmp( who, JABBER_MOCK_HANDLE ) == 0 )
451	{
452	jd->flags \|= JFLAG_MOCK;
453	imcb_add_buddy( ic, who, NULL );
454	return;
455	}
456
457	if( jabber_add_to_roster( ic, who, NULL, group ) )
458	presence_send_request( ic, who, "subscribe" );
459	}
460
461	static void jabber_remove_buddy( struct im_connection ic, char who, char *group )
462	{
463	struct jabber_data *jd = ic->proto_data;
464
465	if( g_strcasecmp( who, JABBER_XMLCONSOLE_HANDLE ) == 0 )
466	{
467	jd->flags &= ~JFLAG_XMLCONSOLE;
468	/* Not necessary for now. And for now the code isn't too
469	happy if the buddy is completely gone right after calling
470	this function already.
471	imcb_remove_buddy( ic, JABBER_XMLCONSOLE_HANDLE, NULL );
472	*/
473	return;
474	}
475	else if( g_strcasecmp( who, JABBER_MOCK_HANDLE ) == 0 )
476	{
477	jd->flags &= ~JFLAG_MOCK;
478	return;
479	}
480
481	/* We should always do this part. Clean up our administration a little bit. */
482	jabber_buddy_remove_bare( ic, who );
483
484	if( jabber_remove_from_roster( ic, who ) )
485	presence_send_request( ic, who, "unsubscribe" );
486	}
487
488	static struct groupchat jabber_chat_join_( struct im_connection ic, const char room, const char nick, const char password, set_t *sets )
489	{
490	if( strchr( room, '@' ) == NULL )
491	imcb_error( ic, "Invalid room name: %s", room );
492	else if( jabber_chat_by_jid( ic, room ) )
493	imcb_error( ic, "Already present in chat `%s'", room );
494	else
495	return jabber_chat_join( ic, room, nick, set_getstr( sets, "password" ) );
496
497	return NULL;
498	}
499
500	static void jabber_chat_msg_( struct groupchat c, char message, int flags )
501	{
502	if( c && message )
503	jabber_chat_msg( c, message, flags );
504	}
505
506	static void jabber_chat_topic_( struct groupchat c, char topic )
507	{
508	if( c && topic )
509	jabber_chat_topic( c, topic );
510	}
511
512	static void jabber_chat_leave_( struct groupchat *c )
513	{
514	if( c )
515	jabber_chat_leave( c, NULL );
516	}
517
518	static void jabber_chat_invite_( struct groupchat c, char who, char *msg )
519	{
520	struct jabber_chat *jc = c->data;
521	gchar *msg_alt = NULL;
522
523	if( msg == NULL )
524	msg_alt = g_strdup_printf( "%s invited you to %s", c->ic->acc->user, jc->name );
525
526	if( c && who )
527	jabber_chat_invite( c, who, msg ? msg : msg_alt );
528
529	g_free( msg_alt );
530	}
531
532	static void jabber_keepalive( struct im_connection *ic )
533	{
534	/* Just any whitespace character is enough as a keepalive for XMPP sessions. */
535	if( !jabber_write( ic, "\n", 1 ) )
536	return;
537
538	/* This runs the garbage collection every minute, which means every packet
539	is in the cache for about a minute (which should be enough AFAIK). */
540	jabber_cache_clean( ic );
541	}
542
543	static int jabber_send_typing( struct im_connection ic, char who, int typing )
544	{
545	struct jabber_data *jd = ic->proto_data;
546	struct jabber_buddy *bud;
547
548	/* Enable typing notification related code from now. */
549	jd->flags \|= JFLAG_WANT_TYPING;
550
551	if( ( bud = jabber_buddy_by_jid( ic, who, 0 ) ) == NULL )
552	{
553	/* Sending typing notifications to unknown buddies is
554	unsupported for now. Shouldn't be a problem, I think. */
555	return 0;
556	}
557
558	if( bud->flags & JBFLAG_DOES_XEP85 )
559	{
560	/* We're only allowed to send this stuff if we know the other
561	side supports it. */
562
563	struct xt_node *node;
564	char *type;
565	int st;
566
567	if( typing & OPT_TYPING )
568	type = "composing";
569	else if( typing & OPT_THINKING )
570	type = "paused";
571	else
572	type = "active";
573
574	node = xt_new_node( type, NULL, NULL );
575	xt_add_attr( node, "xmlns", XMLNS_CHATSTATES );
576	node = jabber_make_packet( "message", "chat", bud->full_jid, node );
577
578	st = jabber_write_packet( ic, node );
579	xt_free_node( node );
580
581	return st;
582	}
583
584	return 1;
585	}
586
587	void jabber_chat_add_settings( account_t acc, set_t *head )
588	{
589	/* Meh. Stupid room passwords. Not trying to obfuscate/hide
590	them from the user for now. */
591	set_add( head, "password", NULL, NULL, NULL );
592	}
593
594	void jabber_chat_free_settings( account_t acc, set_t *head )
595	{
596	set_del( head, "password" );
597	}
598
599	GList jabber_buddy_action_list( bee_user_t bu )
600	{
601	static GList *ret = NULL;
602
603	if( ret == NULL )
604	{
605	static const struct buddy_action ba[2] = {
606	{ "VERSION", "Get client (version) information" },
607	};
608
609	ret = g_list_prepend( ret, (void*) ba + 0 );
610	}
611
612	return ret;
613	}
614
615	void jabber_buddy_action( struct bee_user bu, const char action, char const args[], void *data )
616	{
617	if( g_strcasecmp( action, "VERSION" ) == 0 )
618	{
619	struct jabber_buddy *bud;
620
621	if( ( bud = jabber_buddy_by_ext_jid( bu->ic, bu->handle, 0 ) ) == NULL )
622	bud = jabber_buddy_by_jid( bu->ic, bu->handle, GET_BUDDY_FIRST );
623	for( ; bud; bud = bud->next )
624	jabber_iq_version_send( bu->ic, bud, data );
625	}
626
627	return NULL;
628	}
629
630	void jabber_initmodule()
631	{
632	struct prpl *ret = g_new0( struct prpl, 1 );
633
634	ret->name = "jabber";
635	ret->mms = 0; /* no limit */
636	ret->login = jabber_login;
637	ret->init = jabber_init;
638	ret->logout = jabber_logout;
639	ret->buddy_msg = jabber_buddy_msg;
640	ret->away_states = jabber_away_states;
641	ret->set_away = jabber_set_away;
642	// ret->set_info = jabber_set_info;
643	ret->get_info = jabber_get_info;
644	ret->add_buddy = jabber_add_buddy;
645	ret->remove_buddy = jabber_remove_buddy;
646	ret->chat_msg = jabber_chat_msg_;
647	ret->chat_topic = jabber_chat_topic_;
648	ret->chat_invite = jabber_chat_invite_;
649	ret->chat_leave = jabber_chat_leave_;
650	ret->chat_join = jabber_chat_join_;
651	ret->chat_add_settings = jabber_chat_add_settings;
652	ret->chat_free_settings = jabber_chat_free_settings;
653	ret->keepalive = jabber_keepalive;
654	ret->send_typing = jabber_send_typing;
655	ret->handle_cmp = g_strcasecmp;
656	ret->transfer_request = jabber_si_transfer_request;
657	ret->buddy_action_list = jabber_buddy_action_list;
658	ret->buddy_action = jabber_buddy_action;
659
660	register_protocol( ret );
661	}

Note: See TracBrowser for help on using the repository browser.

Download in other formats: