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source: protocols/msn/sb.c @ b0a89cc

Last change on this file since b0a89cc was 4aa0f6b, checked in by Wilmer van der Gaast <wilmer@…>, at 2010-06-07T14:31:07Z
Merging killerbee stuff, bringing all the bleeding-edge stuff together.
Property mode set to `100644`
File size: 18.6 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( strcmp( text, SB_KEEPALIVE_MESSAGE ) == 0 )
178	{
179	buf = g_strdup( SB_KEEPALIVE_HEADERS );
180	i = strlen( buf );
181	}
182	else if( strncmp( text, MSN_INVITE_HEADERS, sizeof( MSN_INVITE_HEADERS ) - 1 ) == 0 )
183	{
184	buf = g_strdup( text );
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	struct groupchat *c = NULL;
236	char buf[1024];
237
238	/* Create the groupchat structure. */
239	g_snprintf( buf, sizeof( buf ), "MSN groupchat session %d", sb->session );
240	if( sb->who )
241	c = bee_chat_by_title( ic->bee, ic, sb->who );
242	if( c && !msn_sb_by_chat( c ) )
243	sb->chat = c;
244	else
245	sb->chat = imcb_chat_new( ic, buf );
246
247	/* Populate the channel. */
248	if( sb->who ) imcb_chat_add_buddy( sb->chat, sb->who );
249	imcb_chat_add_buddy( sb->chat, ic->acc->user );
250
251	/* And make sure the switchboard doesn't look like a regular chat anymore. */
252	if( sb->who )
253	{
254	g_free( sb->who );
255	sb->who = NULL;
256	}
257
258	return sb->chat;
259	}
260
261	void msn_sb_destroy( struct msn_switchboard *sb )
262	{
263	struct im_connection *ic = sb->ic;
264	struct msn_data *md = ic->proto_data;
265
266	debug( "Destroying switchboard: %s", sb->who ? sb->who : sb->key ? sb->key : "" );
267
268	msn_msgq_purge( ic, &sb->msgq );
269	msn_sb_stop_keepalives( sb );
270
271	if( sb->key ) g_free( sb->key );
272	if( sb->who ) g_free( sb->who );
273
274	if( sb->chat )
275	{
276	imcb_chat_free( sb->chat );
277	}
278
279	if( sb->handler )
280	{
281	if( sb->handler->rxq ) g_free( sb->handler->rxq );
282	if( sb->handler->cmd_text ) g_free( sb->handler->cmd_text );
283	g_free( sb->handler );
284	}
285
286	if( sb->inp ) b_event_remove( sb->inp );
287	closesocket( sb->fd );
288
289	msn_switchboards = g_slist_remove( msn_switchboards, sb );
290	md->switchboards = g_slist_remove( md->switchboards, sb );
291	g_free( sb );
292	}
293
294	gboolean msn_sb_connected( gpointer data, gint source, b_input_condition cond )
295	{
296	struct msn_switchboard *sb = data;
297	struct im_connection *ic;
298	struct msn_data *md;
299	char buf[1024];
300
301	/* Are we still alive? */
302	if( !g_slist_find( msn_switchboards, sb ) )
303	return FALSE;
304
305	ic = sb->ic;
306	md = ic->proto_data;
307
308	if( source != sb->fd )
309	{
310	debug( "Error %d while connecting to switchboard server", 1 );
311	msn_sb_destroy( sb );
312	return FALSE;
313	}
314
315	/* Prepare the callback */
316	sb->handler = g_new0( struct msn_handler_data, 1 );
317	sb->handler->fd = sb->fd;
318	sb->handler->rxq = g_new0( char, 1 );
319	sb->handler->data = sb;
320	sb->handler->exec_command = msn_sb_command;
321	sb->handler->exec_message = msn_sb_message;
322
323	if( sb->session == MSN_SB_NEW )
324	g_snprintf( buf, sizeof( buf ), "USR %d %s %s\r\n", ++sb->trId, ic->acc->user, sb->key );
325	else
326	g_snprintf( buf, sizeof( buf ), "ANS %d %s %s %d\r\n", ++sb->trId, ic->acc->user, sb->key, sb->session );
327
328	if( msn_sb_write( sb, buf, strlen( buf ) ) )
329	sb->inp = b_input_add( sb->fd, B_EV_IO_READ, msn_sb_callback, sb );
330	else
331	debug( "Error %d while connecting to switchboard server", 2 );
332
333	return FALSE;
334	}
335
336	static gboolean msn_sb_callback( gpointer data, gint source, b_input_condition cond )
337	{
338	struct msn_switchboard *sb = data;
339	struct im_connection *ic = sb->ic;
340	struct msn_data *md = ic->proto_data;
341
342	if( msn_handler( sb->handler ) != -1 )
343	return TRUE;
344
345	if( sb->msgq != NULL )
346	{
347	time_t now = time( NULL );
348	char buf[1024];
349
350	if( now - md->first_sb_failure > 600 )
351	{
352	/* It's not really the first one, but the start of this "series".
353	With this, the warning below will be shown only if this happens
354	at least three times in ten minutes. This algorithm isn't
355	perfect, but for this purpose it will do. */
356	md->first_sb_failure = now;
357	md->sb_failures = 0;
358	}
359
360	debug( "Error: Switchboard died" );
361	if( ++ md->sb_failures >= 3 )
362	imcb_log( ic, "Warning: Many switchboard failures on MSN connection. "
363	"There might be problems delivering your messages." );
364
365	if( md->msgq == NULL )
366	{
367	md->msgq = sb->msgq;
368	}
369	else
370	{
371	GSList *l;
372
373	for( l = md->msgq; l->next; l = l->next );
374	l->next = sb->msgq;
375	}
376	sb->msgq = NULL;
377
378	debug( "Moved queued messages back to the main queue, "
379	"creating a new switchboard to retry." );
380	g_snprintf( buf, sizeof( buf ), "XFR %d SB\r\n", ++md->trId );
381	if( !msn_write( ic, buf, strlen( buf ) ) )
382	return FALSE;
383	}
384
385	msn_sb_destroy( sb );
386	return FALSE;
387	}
388
389	static int msn_sb_command( gpointer data, char **cmd, int num_parts )
390	{
391	struct msn_switchboard *sb = data;
392	struct im_connection *ic = sb->ic;
393	char buf[1024];
394
395	if( !num_parts )
396	{
397	/* Hrrm... Empty command...? Ignore? */
398	return( 1 );
399	}
400
401	if( strcmp( cmd[0], "XFR" ) == 0 )
402	{
403	imcb_error( ic, "Received an XFR from a switchboard server, unable to comply! This is likely to be a bug, please report it!" );
404	imc_logout( ic, TRUE );
405	return( 0 );
406	}
407	else if( strcmp( cmd[0], "USR" ) == 0 )
408	{
409	if( num_parts != 5 )
410	{
411	msn_sb_destroy( sb );
412	return( 0 );
413	}
414
415	if( strcmp( cmd[2], "OK" ) != 0 )
416	{
417	msn_sb_destroy( sb );
418	return( 0 );
419	}
420
421	if( sb->who )
422	{
423	g_snprintf( buf, sizeof( buf ), "CAL %d %s\r\n", ++sb->trId, sb->who );
424	return( msn_sb_write( sb, buf, strlen( buf ) ) );
425	}
426	else
427	{
428	debug( "Just created a switchboard, but I don't know what to do with it." );
429	}
430	}
431	else if( strcmp( cmd[0], "IRO" ) == 0 )
432	{
433	int num, tot;
434
435	if( num_parts != 6 )
436	{
437	msn_sb_destroy( sb );
438	return( 0 );
439	}
440
441	num = atoi( cmd[2] );
442	tot = atoi( cmd[3] );
443
444	if( tot <= 0 )
445	{
446	msn_sb_destroy( sb );
447	return( 0 );
448	}
449	else if( tot > 1 )
450	{
451	char buf[1024];
452
453	if( num == 1 )
454	{
455	g_snprintf( buf, sizeof( buf ), "MSN groupchat session %d", sb->session );
456	sb->chat = imcb_chat_new( ic, buf );
457
458	g_free( sb->who );
459	sb->who = NULL;
460	}
461
462	imcb_chat_add_buddy( sb->chat, cmd[4] );
463
464	if( num == tot )
465	{
466	imcb_chat_add_buddy( sb->chat, ic->acc->user );
467	}
468	}
469	}
470	else if( strcmp( cmd[0], "ANS" ) == 0 )
471	{
472	if( num_parts != 3 )
473	{
474	msn_sb_destroy( sb );
475	return( 0 );
476	}
477
478	if( strcmp( cmd[2], "OK" ) != 0 )
479	{
480	debug( "Switchboard server sent a negative ANS reply" );
481	msn_sb_destroy( sb );
482	return( 0 );
483	}
484
485	sb->ready = 1;
486
487	msn_sb_start_keepalives( sb, FALSE );
488	}
489	else if( strcmp( cmd[0], "CAL" ) == 0 )
490	{
491	if( num_parts != 4 \|\| !isdigit( cmd[3][0] ) )
492	{
493	msn_sb_destroy( sb );
494	return( 0 );
495	}
496
497	sb->session = atoi( cmd[3] );
498	}
499	else if( strcmp( cmd[0], "JOI" ) == 0 )
500	{
501	if( num_parts != 3 )
502	{
503	msn_sb_destroy( sb );
504	return( 0 );
505	}
506
507	if( sb->who && g_strcasecmp( cmd[1], sb->who ) == 0 )
508	{
509	/* The user we wanted to talk to is finally there, let's send the queued messages then. */
510	struct msn_message *m;
511	GSList *l;
512	int st = 1;
513
514	debug( "%s arrived in the switchboard session, now sending queued message(s)", cmd[1] );
515
516	/* Without this, sendmessage() will put everything back on the queue... */
517	sb->ready = 1;
518
519	while( ( l = sb->msgq ) )
520	{
521	m = l->data;
522	if( st )
523	{
524	/* This hack is meant to convert a regular new chat into a groupchat */
525	if( strcmp( m->text, GROUPCHAT_SWITCHBOARD_MESSAGE ) == 0 )
526	msn_sb_to_chat( sb );
527	else
528	st = msn_sb_sendmessage( sb, m->text );
529	}
530	g_free( m->text );
531	g_free( m->who );
532	g_free( m );
533
534	sb->msgq = g_slist_remove( sb->msgq, m );
535	}
536
537	msn_sb_start_keepalives( sb, FALSE );
538
539	return( st );
540	}
541	else if( sb->who )
542	{
543	debug( "Converting chat with %s to a groupchat because %s joined the session.", sb->who, cmd[1] );
544
545	/* This SB is a one-to-one chat right now, but someone else is joining. */
546	msn_sb_to_chat( sb );
547
548	imcb_chat_add_buddy( sb->chat, cmd[1] );
549	}
550	else if( sb->chat )
551	{
552	imcb_chat_add_buddy( sb->chat, cmd[1] );
553	sb->ready = 1;
554	}
555	else
556	{
557	/* PANIC! */
558	}
559	}
560	else if( strcmp( cmd[0], "MSG" ) == 0 )
561	{
562	if( num_parts != 4 )
563	{
564	msn_sb_destroy( sb );
565	return( 0 );
566	}
567
568	sb->handler->msglen = atoi( cmd[3] );
569
570	if( sb->handler->msglen <= 0 )
571	{
572	debug( "Received a corrupted message on the switchboard, the switchboard will be closed" );
573	msn_sb_destroy( sb );
574	return( 0 );
575	}
576	}
577	else if( strcmp( cmd[0], "NAK" ) == 0 )
578	{
579	if( sb->who )
580	{
581	imcb_log( ic, "The MSN servers could not deliver one of your messages to %s.", sb->who );
582	}
583	else
584	{
585	imcb_log( ic, "The MSN servers could not deliver one of your groupchat messages to all participants." );
586	}
587	}
588	else if( strcmp( cmd[0], "BYE" ) == 0 )
589	{
590	if( num_parts < 2 )
591	{
592	msn_sb_destroy( sb );
593	return( 0 );
594	}
595
596	/* if( cmd[2] && cmd[2] == '1' ) -=> Chat is being cleaned up because of idleness /
597
598	if( sb->who )
599	{
600	msn_sb_stop_keepalives( sb );
601
602	/* This is a single-person chat, and the other person is leaving. */
603	g_free( sb->who );
604	sb->who = NULL;
605	sb->ready = 0;
606
607	debug( "Person %s left the one-to-one switchboard connection. Keeping it around as a spare...", cmd[1] );
608
609	/* We could clean up the switchboard now, but keeping it around
610	as a spare for a next conversation sounds more sane to me.
611	The server will clean it up when it's idle for too long. */
612	}
613	else if( sb->chat )
614	{
615	imcb_chat_remove_buddy( sb->chat, cmd[1], "" );
616	}
617	else
618	{
619	/* PANIC! */
620	}
621	}
622	else if( isdigit( cmd[0][0] ) )
623	{
624	int num = atoi( cmd[0] );
625	const struct msn_status_code *err = msn_status_by_number( num );
626
627	imcb_error( ic, "Error reported by switchboard server: %s", err->text );
628
629	if( err->flags & STATUS_SB_FATAL )
630	{
631	msn_sb_destroy( sb );
632	return 0;
633	}
634	else if( err->flags & STATUS_FATAL )
635	{
636	imc_logout( ic, TRUE );
637	return 0;
638	}
639	else if( err->flags & STATUS_SB_IM_SPARE )
640	{
641	if( sb->who )
642	{
643	/* Apparently some invitation failed. We might want to use this
644	board later, so keep it as a spare. */
645	g_free( sb->who );
646	sb->who = NULL;
647
648	/* Also clear the msgq, otherwise someone else might get them. */
649	msn_msgq_purge( ic, &sb->msgq );
650	}
651
652	/* Do NOT return 0 here, we want to keep this sb. */
653	}
654	}
655	else
656	{
657	/* debug( "Received unknown command from switchboard server: %s", cmd[0] ); */
658	}
659
660	return( 1 );
661	}
662
663	static int msn_sb_message( gpointer data, char msg, int msglen, char *cmd, int num_parts )
664	{
665	struct msn_switchboard *sb = data;
666	struct im_connection *ic = sb->ic;
667	char *body;
668	int blen = 0;
669
670	if( !num_parts )
671	return( 1 );
672
673	if( ( body = strstr( msg, "\r\n\r\n" ) ) )
674	{
675	body += 4;
676	blen = msglen - ( body - msg );
677	}
678
679	if( strcmp( cmd[0], "MSG" ) == 0 )
680	{
681	char *ct = msn_findheader( msg, "Content-Type:", msglen );
682
683	if( !ct )
684	return( 1 );
685
686	if( g_strncasecmp( ct, "text/plain", 10 ) == 0 )
687	{
688	g_free( ct );
689
690	if( !body )
691	return( 1 );
692
693	if( sb->who )
694	{
695	imcb_buddy_msg( ic, cmd[1], body, 0, 0 );
696	}
697	else if( sb->chat )
698	{
699	imcb_chat_msg( sb->chat, cmd[1], body, 0, 0 );
700	}
701	else
702	{
703	/* PANIC! */
704	}
705	}
706	#if 0
707	// Disable MSN ft support for now.
708	else if( g_strncasecmp( ct, "text/x-msmsgsinvite", 19 ) == 0 )
709	{
710	char *command = msn_findheader( body, "Invitation-Command:", blen );
711	char *cookie = msn_findheader( body, "Invitation-Cookie:", blen );
712	unsigned int icookie;
713
714	g_free( ct );
715
716	/* Every invite should have both a Command and Cookie header */
717	if( !command \|\| !cookie ) {
718	g_free( command );
719	g_free( cookie );
720	imcb_log( ic, "Warning: No command or cookie from %s", sb->who );
721	return 1;
722	}
723
724	icookie = strtoul( cookie, NULL, 10 );
725	g_free( cookie );
726
727	if( g_strncasecmp( command, "INVITE", 6 ) == 0 ) {
728	msn_invitation_invite( sb, cmd[1], icookie, body, blen );
729	} else if( g_strncasecmp( command, "ACCEPT", 6 ) == 0 ) {
730	msn_invitation_accept( sb, cmd[1], icookie, body, blen );
731	} else if( g_strncasecmp( command, "CANCEL", 6 ) == 0 ) {
732	msn_invitation_cancel( sb, cmd[1], icookie, body, blen );
733	} else {
734	imcb_log( ic, "Warning: Received invalid invitation with "
735	"command %s from %s", command, sb->who );
736	}
737
738	g_free( command );
739	}
740	#endif
741	else if( g_strncasecmp( ct, "application/x-msnmsgrp2p", 24 ) == 0 )
742	{
743	imcb_error( sb->ic, "Cannot receive file from %s: BitlBee does not "
744	"support msnmsgrp2p yet.", sb->who );
745	g_free( ct );
746	}
747	else if( g_strncasecmp( ct, "text/x-msmsgscontrol", 20 ) == 0 )
748	{
749	char *who = msn_findheader( msg, "TypingUser:", msglen );
750
751	if( who )
752	{
753	imcb_buddy_typing( ic, who, OPT_TYPING );
754	g_free( who );
755	}
756
757	g_free( ct );
758	}
759	else
760	{
761	g_free( ct );
762	}
763	}
764
765	return( 1 );
766	}
767
768	static gboolean msn_sb_keepalive( gpointer data, gint source, b_input_condition cond )
769	{
770	struct msn_switchboard *sb = data;
771	return sb->ready && msn_sb_sendmessage( sb, SB_KEEPALIVE_MESSAGE );
772	}
773
774	void msn_sb_start_keepalives( struct msn_switchboard *sb, gboolean initial )
775	{
776	bee_user_t *bu;
777
778	if( sb && sb->who && sb->keepalive == 0 &&
779	( bu = bee_user_by_handle( sb->ic->bee, sb->ic, sb->who ) ) &&
780	!( bu->flags & BEE_USER_ONLINE ) &&
781	set_getbool( &sb->ic->acc->set, "switchboard_keepalives" ) )
782	{
783	if( initial )
784	msn_sb_keepalive( sb, 0, 0 );
785
786	sb->keepalive = b_timeout_add( 20000, msn_sb_keepalive, sb );
787	}
788	}
789
790	void msn_sb_stop_keepalives( struct msn_switchboard *sb )
791	{
792	if( sb && sb->keepalive > 0 )
793	{
794	b_event_remove( sb->keepalive );
795	sb->keepalive = 0;
796	}
797	}

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