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source: protocols/msn/sb.c @ bc49ec2

Last change on this file since bc49ec2 was ec86b22, checked in by Wilmer van der Gaast <wilmer@…>, at 2010-05-15T23:28:16Z
Mainline merge. (Probably mostly irrelevant for this branch, oh well.)
Property mode set to `100644`
File size: 18.4 KB

Line
1	/********************************************************************\
2	* BitlBee -- An IRC to other IM-networks gateway *
3	* *
4	* Copyright 2002-2005 Wilmer van der Gaast and others *
5	\********************************************************************/
6
7	/* MSN module - Switchboard server callbacks and utilities */
8
9	/*
10	This program is free software; you can redistribute it and/or modify
11	it under the terms of the GNU General Public License as published by
12	the Free Software Foundation; either version 2 of the License, or
13	(at your option) any later version.
14
15	This program is distributed in the hope that it will be useful,
16	but WITHOUT ANY WARRANTY; without even the implied warranty of
17	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18	GNU General Public License for more details.
19
20	You should have received a copy of the GNU General Public License with
21	the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
22	if not, write to the Free Software Foundation, Inc., 59 Temple Place,
23	Suite 330, Boston, MA 02111-1307 USA
24	*/
25
26	#include <ctype.h>
27	#include "nogaim.h"
28	#include "msn.h"
29	#include "passport.h"
30	#include "md5.h"
31	#include "invitation.h"
32
33	static gboolean msn_sb_callback( gpointer data, gint source, b_input_condition cond );
34	static int msn_sb_command( gpointer data, char **cmd, int num_parts );
35	static int msn_sb_message( gpointer data, char msg, int msglen, char *cmd, int num_parts );
36
37	int msn_sb_write( struct msn_switchboard sb, char s, int len )
38	{
39	int st;
40
41	st = write( sb->fd, s, len );
42	if( st != len )
43	{
44	msn_sb_destroy( sb );
45	return( 0 );
46	}
47
48	return( 1 );
49	}
50
51	int msn_sb_write_msg( struct im_connection ic, struct msn_message m )
52	{
53	struct msn_data *md = ic->proto_data;
54	struct msn_switchboard *sb;
55	char buf[1024];
56
57	/* FIXME: CHECK the reliability of using spare sb's! */
58	if( ( sb = msn_sb_spare( ic ) ) )
59	{
60	debug( "Trying to use a spare switchboard to message %s", m->who );
61
62	sb->who = g_strdup( m->who );
63	g_snprintf( buf, sizeof( buf ), "CAL %d %s\r\n", ++sb->trId, m->who );
64	if( msn_sb_write( sb, buf, strlen( buf ) ) )
65	{
66	/* He/She should join the switchboard soon, let's queue the message. */
67	sb->msgq = g_slist_append( sb->msgq, m );
68	return( 1 );
69	}
70	}
71
72	debug( "Creating a new switchboard to message %s", m->who );
73
74	/* If we reach this line, there was no spare switchboard, so let's make one. */
75	g_snprintf( buf, sizeof( buf ), "XFR %d SB\r\n", ++md->trId );
76	if( !msn_write( ic, buf, strlen( buf ) ) )
77	{
78	g_free( m->who );
79	g_free( m->text );
80	g_free( m );
81
82	return( 0 );
83	}
84
85	/* And queue the message to md. We'll pick it up when the switchboard comes up. */
86	md->msgq = g_slist_append( md->msgq, m );
87
88	/* FIXME: If the switchboard creation fails, the message will not be sent. */
89
90	return( 1 );
91	}
92
93	struct msn_switchboard msn_sb_create( struct im_connection ic, char host, int port, char key, int session )
94	{
95	struct msn_data *md = ic->proto_data;
96	struct msn_switchboard *sb = g_new0( struct msn_switchboard, 1 );
97
98	sb->fd = proxy_connect( host, port, msn_sb_connected, sb );
99	if( sb->fd < 0 )
100	{
101	g_free( sb );
102	return( NULL );
103	}
104
105	sb->ic = ic;
106	sb->key = g_strdup( key );
107	sb->session = session;
108
109	msn_switchboards = g_slist_append( msn_switchboards, sb );
110	md->switchboards = g_slist_append( md->switchboards, sb );
111
112	return( sb );
113	}
114
115	struct msn_switchboard msn_sb_by_handle( struct im_connection ic, char *handle )
116	{
117	struct msn_data *md = ic->proto_data;
118	struct msn_switchboard *sb;
119	GSList *l;
120
121	for( l = md->switchboards; l; l = l->next )
122	{
123	sb = l->data;
124	if( sb->who && strcmp( sb->who, handle ) == 0 )
125	return( sb );
126	}
127
128	return( NULL );
129	}
130
131	struct msn_switchboard msn_sb_by_chat( struct groupchat c )
132	{
133	struct msn_data *md = c->ic->proto_data;
134	struct msn_switchboard *sb;
135	GSList *l;
136
137	for( l = md->switchboards; l; l = l->next )
138	{
139	sb = l->data;
140	if( sb->chat == c )
141	return( sb );
142	}
143
144	return( NULL );
145	}
146
147	struct msn_switchboard msn_sb_spare( struct im_connection ic )
148	{
149	struct msn_data *md = ic->proto_data;
150	struct msn_switchboard *sb;
151	GSList *l;
152
153	for( l = md->switchboards; l; l = l->next )
154	{
155	sb = l->data;
156	if( !sb->who && !sb->chat )
157	return( sb );
158	}
159
160	return( NULL );
161	}
162
163	int msn_sb_sendmessage( struct msn_switchboard sb, char text )
164	{
165	if( sb->ready )
166	{
167	char packet, buf;
168	int i, j;
169
170	/* Build the message. Convert LF to CR-LF for normal messages. */
171	if( strcmp( text, TYPING_NOTIFICATION_MESSAGE ) == 0 )
172	{
173	i = strlen( MSN_TYPING_HEADERS ) + strlen( sb->ic->acc->user );
174	buf = g_new0( char, i );
175	i = g_snprintf( buf, i, MSN_TYPING_HEADERS, sb->ic->acc->user );
176	}
177	else if( strncmp( text, MSN_INVITE_HEADERS, sizeof( MSN_INVITE_HEADERS ) - 1 ) == 0 )
178	{
179	buf = g_strdup( text );
180	i = strlen( buf );
181	}
182	else if( strcmp( text, SB_KEEPALIVE_MESSAGE ) == 0 )
183	{
184	buf = g_strdup( SB_KEEPALIVE_HEADERS );
185	i = strlen( buf );
186	}
187	else
188	{
189	buf = g_new0( char, sizeof( MSN_MESSAGE_HEADERS ) + strlen( text ) * 2 + 1 );
190	i = strlen( MSN_MESSAGE_HEADERS );
191
192	strcpy( buf, MSN_MESSAGE_HEADERS );
193	for( j = 0; text[j]; j ++ )
194	{
195	if( text[j] == '\n' )
196	buf[i++] = '\r';
197
198	buf[i++] = text[j];
199	}
200	}
201
202	/* Build the final packet (MSG command + the message). */
203	packet = g_strdup_printf( "MSG %d N %d\r\n%s", ++sb->trId, i, buf );
204	g_free( buf );
205	if( msn_sb_write( sb, packet, strlen( packet ) ) )
206	{
207	g_free( packet );
208	return( 1 );
209	}
210	else
211	{
212	g_free( packet );
213	return( 0 );
214	}
215	}
216	else if( sb->who )
217	{
218	struct msn_message *m = g_new0( struct msn_message, 1 );
219
220	m->who = g_strdup( "" );
221	m->text = g_strdup( text );
222	sb->msgq = g_slist_append( sb->msgq, m );
223
224	return( 1 );
225	}
226	else
227	{
228	return( 0 );
229	}
230	}
231
232	struct groupchat msn_sb_to_chat( struct msn_switchboard sb )
233	{
234	struct im_connection *ic = sb->ic;
235	char buf[1024];
236
237	/* Create the groupchat structure. */
238	g_snprintf( buf, sizeof( buf ), "MSN groupchat session %d", sb->session );
239	sb->chat = imcb_chat_new( ic, buf );
240
241	/* Populate the channel. */
242	if( sb->who ) imcb_chat_add_buddy( sb->chat, sb->who );
243	imcb_chat_add_buddy( sb->chat, ic->acc->user );
244
245	/* And make sure the switchboard doesn't look like a regular chat anymore. */
246	if( sb->who )
247	{
248	g_free( sb->who );
249	sb->who = NULL;
250	}
251
252	return sb->chat;
253	}
254
255	void msn_sb_destroy( struct msn_switchboard *sb )
256	{
257	struct im_connection *ic = sb->ic;
258	struct msn_data *md = ic->proto_data;
259
260	debug( "Destroying switchboard: %s", sb->who ? sb->who : sb->key ? sb->key : "" );
261
262	msn_msgq_purge( ic, &sb->msgq );
263	msn_sb_stop_keepalives( sb );
264
265	if( sb->key ) g_free( sb->key );
266	if( sb->who ) g_free( sb->who );
267
268	if( sb->chat )
269	{
270	imcb_chat_free( sb->chat );
271	}
272
273	if( sb->handler )
274	{
275	if( sb->handler->rxq ) g_free( sb->handler->rxq );
276	if( sb->handler->cmd_text ) g_free( sb->handler->cmd_text );
277	g_free( sb->handler );
278	}
279
280	if( sb->inp ) b_event_remove( sb->inp );
281	closesocket( sb->fd );
282
283	msn_switchboards = g_slist_remove( msn_switchboards, sb );
284	md->switchboards = g_slist_remove( md->switchboards, sb );
285	g_free( sb );
286	}
287
288	gboolean msn_sb_connected( gpointer data, gint source, b_input_condition cond )
289	{
290	struct msn_switchboard *sb = data;
291	struct im_connection *ic;
292	struct msn_data *md;
293	char buf[1024];
294
295	/* Are we still alive? */
296	if( !g_slist_find( msn_switchboards, sb ) )
297	return FALSE;
298
299	ic = sb->ic;
300	md = ic->proto_data;
301
302	if( source != sb->fd )
303	{
304	debug( "Error %d while connecting to switchboard server", 1 );
305	msn_sb_destroy( sb );
306	return FALSE;
307	}
308
309	/* Prepare the callback */
310	sb->handler = g_new0( struct msn_handler_data, 1 );
311	sb->handler->fd = sb->fd;
312	sb->handler->rxq = g_new0( char, 1 );
313	sb->handler->data = sb;
314	sb->handler->exec_command = msn_sb_command;
315	sb->handler->exec_message = msn_sb_message;
316
317	if( sb->session == MSN_SB_NEW )
318	g_snprintf( buf, sizeof( buf ), "USR %d %s %s\r\n", ++sb->trId, ic->acc->user, sb->key );
319	else
320	g_snprintf( buf, sizeof( buf ), "ANS %d %s %s %d\r\n", ++sb->trId, ic->acc->user, sb->key, sb->session );
321
322	if( msn_sb_write( sb, buf, strlen( buf ) ) )
323	sb->inp = b_input_add( sb->fd, B_EV_IO_READ, msn_sb_callback, sb );
324	else
325	debug( "Error %d while connecting to switchboard server", 2 );
326
327	return FALSE;
328	}
329
330	static gboolean msn_sb_callback( gpointer data, gint source, b_input_condition cond )
331	{
332	struct msn_switchboard *sb = data;
333	struct im_connection *ic = sb->ic;
334	struct msn_data *md = ic->proto_data;
335
336	if( msn_handler( sb->handler ) != -1 )
337	return TRUE;
338
339	if( sb->msgq != NULL )
340	{
341	time_t now = time( NULL );
342	char buf[1024];
343
344	if( now - md->first_sb_failure > 600 )
345	{
346	/* It's not really the first one, but the start of this "series".
347	With this, the warning below will be shown only if this happens
348	at least three times in ten minutes. This algorithm isn't
349	perfect, but for this purpose it will do. */
350	md->first_sb_failure = now;
351	md->sb_failures = 0;
352	}
353
354	debug( "Error: Switchboard died" );
355	if( ++ md->sb_failures >= 3 )
356	imcb_log( ic, "Warning: Many switchboard failures on MSN connection. "
357	"There might be problems delivering your messages." );
358
359	if( md->msgq == NULL )
360	{
361	md->msgq = sb->msgq;
362	}
363	else
364	{
365	GSList *l;
366
367	for( l = md->msgq; l->next; l = l->next );
368	l->next = sb->msgq;
369	}
370	sb->msgq = NULL;
371
372	debug( "Moved queued messages back to the main queue, "
373	"creating a new switchboard to retry." );
374	g_snprintf( buf, sizeof( buf ), "XFR %d SB\r\n", ++md->trId );
375	if( !msn_write( ic, buf, strlen( buf ) ) )
376	return FALSE;
377	}
378
379	msn_sb_destroy( sb );
380	return FALSE;
381	}
382
383	static int msn_sb_command( gpointer data, char **cmd, int num_parts )
384	{
385	struct msn_switchboard *sb = data;
386	struct im_connection *ic = sb->ic;
387	char buf[1024];
388
389	if( !num_parts )
390	{
391	/* Hrrm... Empty command...? Ignore? */
392	return( 1 );
393	}
394
395	if( strcmp( cmd[0], "XFR" ) == 0 )
396	{
397	imcb_error( ic, "Received an XFR from a switchboard server, unable to comply! This is likely to be a bug, please report it!" );
398	imc_logout( ic, TRUE );
399	return( 0 );
400	}
401	else if( strcmp( cmd[0], "USR" ) == 0 )
402	{
403	if( num_parts != 5 )
404	{
405	msn_sb_destroy( sb );
406	return( 0 );
407	}
408
409	if( strcmp( cmd[2], "OK" ) != 0 )
410	{
411	msn_sb_destroy( sb );
412	return( 0 );
413	}
414
415	if( sb->who )
416	{
417	g_snprintf( buf, sizeof( buf ), "CAL %d %s\r\n", ++sb->trId, sb->who );
418	return( msn_sb_write( sb, buf, strlen( buf ) ) );
419	}
420	else
421	{
422	debug( "Just created a switchboard, but I don't know what to do with it." );
423	}
424	}
425	else if( strcmp( cmd[0], "IRO" ) == 0 )
426	{
427	int num, tot;
428
429	if( num_parts != 6 )
430	{
431	msn_sb_destroy( sb );
432	return( 0 );
433	}
434
435	num = atoi( cmd[2] );
436	tot = atoi( cmd[3] );
437
438	if( tot <= 0 )
439	{
440	msn_sb_destroy( sb );
441	return( 0 );
442	}
443	else if( tot > 1 )
444	{
445	char buf[1024];
446
447	if( num == 1 )
448	{
449	g_snprintf( buf, sizeof( buf ), "MSN groupchat session %d", sb->session );
450	sb->chat = imcb_chat_new( ic, buf );
451
452	g_free( sb->who );
453	sb->who = NULL;
454	}
455
456	imcb_chat_add_buddy( sb->chat, cmd[4] );
457
458	if( num == tot )
459	{
460	imcb_chat_add_buddy( sb->chat, ic->acc->user );
461	}
462	}
463	}
464	else if( strcmp( cmd[0], "ANS" ) == 0 )
465	{
466	if( num_parts != 3 )
467	{
468	msn_sb_destroy( sb );
469	return( 0 );
470	}
471
472	if( strcmp( cmd[2], "OK" ) != 0 )
473	{
474	debug( "Switchboard server sent a negative ANS reply" );
475	msn_sb_destroy( sb );
476	return( 0 );
477	}
478
479	sb->ready = 1;
480
481	msn_sb_start_keepalives( sb, FALSE );
482	}
483	else if( strcmp( cmd[0], "CAL" ) == 0 )
484	{
485	if( num_parts != 4 \|\| !isdigit( cmd[3][0] ) )
486	{
487	msn_sb_destroy( sb );
488	return( 0 );
489	}
490
491	sb->session = atoi( cmd[3] );
492	}
493	else if( strcmp( cmd[0], "JOI" ) == 0 )
494	{
495	if( num_parts != 3 )
496	{
497	msn_sb_destroy( sb );
498	return( 0 );
499	}
500
501	if( sb->who && g_strcasecmp( cmd[1], sb->who ) == 0 )
502	{
503	/* The user we wanted to talk to is finally there, let's send the queued messages then. */
504	struct msn_message *m;
505	GSList *l;
506	int st = 1;
507
508	debug( "%s arrived in the switchboard session, now sending queued message(s)", cmd[1] );
509
510	/* Without this, sendmessage() will put everything back on the queue... */
511	sb->ready = 1;
512
513	while( ( l = sb->msgq ) )
514	{
515	m = l->data;
516	if( st )
517	{
518	/* This hack is meant to convert a regular new chat into a groupchat */
519	if( strcmp( m->text, GROUPCHAT_SWITCHBOARD_MESSAGE ) == 0 )
520	msn_sb_to_chat( sb );
521	else
522	st = msn_sb_sendmessage( sb, m->text );
523	}
524	g_free( m->text );
525	g_free( m->who );
526	g_free( m );
527
528	sb->msgq = g_slist_remove( sb->msgq, m );
529	}
530
531	msn_sb_start_keepalives( sb, FALSE );
532
533	return( st );
534	}
535	else if( sb->who )
536	{
537	debug( "Converting chat with %s to a groupchat because %s joined the session.", sb->who, cmd[1] );
538
539	/* This SB is a one-to-one chat right now, but someone else is joining. */
540	msn_sb_to_chat( sb );
541
542	imcb_chat_add_buddy( sb->chat, cmd[1] );
543	}
544	else if( sb->chat )
545	{
546	imcb_chat_add_buddy( sb->chat, cmd[1] );
547	sb->ready = 1;
548	}
549	else
550	{
551	/* PANIC! */
552	}
553	}
554	else if( strcmp( cmd[0], "MSG" ) == 0 )
555	{
556	if( num_parts != 4 )
557	{
558	msn_sb_destroy( sb );
559	return( 0 );
560	}
561
562	sb->handler->msglen = atoi( cmd[3] );
563
564	if( sb->handler->msglen <= 0 )
565	{
566	debug( "Received a corrupted message on the switchboard, the switchboard will be closed" );
567	msn_sb_destroy( sb );
568	return( 0 );
569	}
570	}
571	else if( strcmp( cmd[0], "NAK" ) == 0 )
572	{
573	if( sb->who )
574	{
575	imcb_log( ic, "The MSN servers could not deliver one of your messages to %s.", sb->who );
576	}
577	else
578	{
579	imcb_log( ic, "The MSN servers could not deliver one of your groupchat messages to all participants." );
580	}
581	}
582	else if( strcmp( cmd[0], "BYE" ) == 0 )
583	{
584	if( num_parts < 2 )
585	{
586	msn_sb_destroy( sb );
587	return( 0 );
588	}
589
590	/* if( cmd[2] && cmd[2] == '1' ) -=> Chat is being cleaned up because of idleness /
591
592	if( sb->who )
593	{
594	msn_sb_stop_keepalives( sb );
595
596	/* This is a single-person chat, and the other person is leaving. */
597	g_free( sb->who );
598	sb->who = NULL;
599	sb->ready = 0;
600
601	debug( "Person %s left the one-to-one switchboard connection. Keeping it around as a spare...", cmd[1] );
602
603	/* We could clean up the switchboard now, but keeping it around
604	as a spare for a next conversation sounds more sane to me.
605	The server will clean it up when it's idle for too long. */
606	}
607	else if( sb->chat )
608	{
609	imcb_chat_remove_buddy( sb->chat, cmd[1], "" );
610	}
611	else
612	{
613	/* PANIC! */
614	}
615	}
616	else if( isdigit( cmd[0][0] ) )
617	{
618	int num = atoi( cmd[0] );
619	const struct msn_status_code *err = msn_status_by_number( num );
620
621	imcb_error( ic, "Error reported by switchboard server: %s", err->text );
622
623	if( err->flags & STATUS_SB_FATAL )
624	{
625	msn_sb_destroy( sb );
626	return 0;
627	}
628	else if( err->flags & STATUS_FATAL )
629	{
630	imc_logout( ic, TRUE );
631	return 0;
632	}
633	else if( err->flags & STATUS_SB_IM_SPARE )
634	{
635	if( sb->who )
636	{
637	/* Apparently some invitation failed. We might want to use this
638	board later, so keep it as a spare. */
639	g_free( sb->who );
640	sb->who = NULL;
641
642	/* Also clear the msgq, otherwise someone else might get them. */
643	msn_msgq_purge( ic, &sb->msgq );
644	}
645
646	/* Do NOT return 0 here, we want to keep this sb. */
647	}
648	}
649	else
650	{
651	/* debug( "Received unknown command from switchboard server: %s", cmd[0] ); */
652	}
653
654	return( 1 );
655	}
656
657	static int msn_sb_message( gpointer data, char msg, int msglen, char *cmd, int num_parts )
658	{
659	struct msn_switchboard *sb = data;
660	struct im_connection *ic = sb->ic;
661	char *body;
662	int blen = 0;
663
664	if( !num_parts )
665	return( 1 );
666
667	if( ( body = strstr( msg, "\r\n\r\n" ) ) )
668	{
669	body += 4;
670	blen = msglen - ( body - msg );
671	}
672
673	if( strcmp( cmd[0], "MSG" ) == 0 )
674	{
675	char *ct = msn_findheader( msg, "Content-Type:", msglen );
676
677	if( !ct )
678	return( 1 );
679
680	if( g_strncasecmp( ct, "text/plain", 10 ) == 0 )
681	{
682	g_free( ct );
683
684	if( !body )
685	return( 1 );
686
687	if( sb->who )
688	{
689	imcb_buddy_msg( ic, cmd[1], body, 0, 0 );
690	}
691	else if( sb->chat )
692	{
693	imcb_chat_msg( sb->chat, cmd[1], body, 0, 0 );
694	}
695	else
696	{
697	/* PANIC! */
698	}
699	}
700	else if( g_strncasecmp( ct, "text/x-msmsgsinvite", 19 ) == 0 )
701	{
702	char *command = msn_findheader( body, "Invitation-Command:", blen );
703	char *cookie = msn_findheader( body, "Invitation-Cookie:", blen );
704	unsigned int icookie;
705
706	g_free( ct );
707
708	/* Every invite should have both a Command and Cookie header */
709	if( !command \|\| !cookie ) {
710	g_free( command );
711	g_free( cookie );
712	imcb_log( ic, "Warning: No command or cookie from %s", sb->who );
713	return 1;
714	}
715
716	icookie = strtoul( cookie, NULL, 10 );
717	g_free( cookie );
718
719	if( g_strncasecmp( command, "INVITE", 6 ) == 0 ) {
720	msn_invitation_invite( sb, cmd[1], icookie, body, blen );
721	} else if( g_strncasecmp( command, "ACCEPT", 6 ) == 0 ) {
722	msn_invitation_accept( sb, cmd[1], icookie, body, blen );
723	} else if( g_strncasecmp( command, "CANCEL", 6 ) == 0 ) {
724	msn_invitation_cancel( sb, cmd[1], icookie, body, blen );
725	} else {
726	imcb_log( ic, "Warning: Received invalid invitation with "
727	"command %s from %s", command, sb->who );
728	}
729
730	g_free( command );
731	}
732	else if( g_strncasecmp( ct, "application/x-msnmsgrp2p", 24 ) == 0 )
733	{
734	imcb_error( sb->ic, "Cannot receive file from %s: BitlBee does not "
735	"support msnmsgrp2p yet.", sb->who );
736	g_free( ct );
737	}
738	else if( g_strncasecmp( ct, "text/x-msmsgscontrol", 20 ) == 0 )
739	{
740	char *who = msn_findheader( msg, "TypingUser:", msglen );
741
742	if( who )
743	{
744	imcb_buddy_typing( ic, who, OPT_TYPING );
745	g_free( who );
746	}
747
748	g_free( ct );
749	}
750	else
751	{
752	g_free( ct );
753	}
754	}
755
756	return( 1 );
757	}
758
759	static gboolean msn_sb_keepalive( gpointer data, gint source, b_input_condition cond )
760	{
761	struct msn_switchboard *sb = data;
762	return sb->ready && msn_sb_sendmessage( sb, SB_KEEPALIVE_MESSAGE );
763	}
764
765	void msn_sb_start_keepalives( struct msn_switchboard *sb, gboolean initial )
766	{
767	struct buddy *b;
768
769	if( sb && sb->who && sb->keepalive == 0 &&
770	( b = imcb_find_buddy( sb->ic, sb->who ) ) && !b->present &&
771	set_getbool( &sb->ic->acc->set, "switchboard_keepalives" ) )
772	{
773	if( initial )
774	msn_sb_keepalive( sb, 0, 0 );
775
776	sb->keepalive = b_timeout_add( 20000, msn_sb_keepalive, sb );
777	}
778	}
779
780	void msn_sb_stop_keepalives( struct msn_switchboard *sb )
781	{
782	if( sb && sb->keepalive > 0 )
783	{
784	b_event_remove( sb->keepalive );
785	sb->keepalive = 0;
786	}
787	}

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