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source: protocols/msn/sb.c @ 2af3e23

Last change on this file since 2af3e23 was bae0617, checked in by Wilmer van der Gaast <wilmer@…>, at 2010-09-03T21:24:58Z
Rearrange things a bit to support multiple NS connections. This is apparently needed for refreshing auth. tokens.
Property mode set to `100644`
File size: 18.7 KB

Line
1	/********************************************************************\
2	* BitlBee -- An IRC to other IM-networks gateway *
3	* *
4	* Copyright 2002-2010 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 "md5.h"
30	#include "soap.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( struct msn_handler_data handler, char *cmd, int num_parts );
35	static int msn_sb_message( struct msn_handler_data handler, char msg, int msglen, char **cmd, int num_parts );
36
37	int msn_sb_write( struct msn_switchboard sb, const char fmt, ... )
38	{
39	va_list params;
40	char *out;
41	size_t len;
42	int st;
43
44	va_start( params, fmt );
45	out = g_strdup_vprintf( fmt, params );
46	va_end( params );
47
48	if( getenv( "BITLBEE_DEBUG" ) )
49	fprintf( stderr, "->SB%d:%s", sb->fd, out );
50
51	len = strlen( out );
52	st = write( sb->fd, out, len );
53	g_free( out );
54	if( st != len )
55	{
56	msn_sb_destroy( sb );
57	return 0;
58	}
59
60	return 1;
61	}
62
63	int msn_sb_write_msg( struct im_connection ic, struct msn_message m )
64	{
65	struct msn_data *md = ic->proto_data;
66	struct msn_switchboard *sb;
67
68	/* FIXME: CHECK the reliability of using spare sb's! */
69	if( ( sb = msn_sb_spare( ic ) ) )
70	{
71	debug( "Trying to use a spare switchboard to message %s", m->who );
72
73	sb->who = g_strdup( m->who );
74	if( msn_sb_write( sb, "CAL %d %s\r\n", ++sb->trId, m->who ) )
75	{
76	/* He/She should join the switchboard soon, let's queue the message. */
77	sb->msgq = g_slist_append( sb->msgq, m );
78	return( 1 );
79	}
80	}
81
82	debug( "Creating a new switchboard to message %s", m->who );
83
84	/* If we reach this line, there was no spare switchboard, so let's make one. */
85	if( !msn_ns_write( ic, -1, "XFR %d SB\r\n", ++md->trId ) )
86	{
87	g_free( m->who );
88	g_free( m->text );
89	g_free( m );
90
91	return( 0 );
92	}
93
94	/* And queue the message to md. We'll pick it up when the switchboard comes up. */
95	md->msgq = g_slist_append( md->msgq, m );
96
97	/* FIXME: If the switchboard creation fails, the message will not be sent. */
98
99	return( 1 );
100	}
101
102	struct msn_switchboard msn_sb_create( struct im_connection ic, char host, int port, char key, int session )
103	{
104	struct msn_data *md = ic->proto_data;
105	struct msn_switchboard *sb = g_new0( struct msn_switchboard, 1 );
106
107	sb->fd = proxy_connect( host, port, msn_sb_connected, sb );
108	if( sb->fd < 0 )
109	{
110	g_free( sb );
111	return( NULL );
112	}
113
114	sb->ic = ic;
115	sb->key = g_strdup( key );
116	sb->session = session;
117
118	msn_switchboards = g_slist_append( msn_switchboards, sb );
119	md->switchboards = g_slist_append( md->switchboards, sb );
120
121	return( sb );
122	}
123
124	struct msn_switchboard msn_sb_by_handle( struct im_connection ic, char *handle )
125	{
126	struct msn_data *md = ic->proto_data;
127	struct msn_switchboard *sb;
128	GSList *l;
129
130	for( l = md->switchboards; l; l = l->next )
131	{
132	sb = l->data;
133	if( sb->who && strcmp( sb->who, handle ) == 0 )
134	return( sb );
135	}
136
137	return( NULL );
138	}
139
140	struct msn_switchboard msn_sb_by_chat( struct groupchat c )
141	{
142	struct msn_data *md = c->ic->proto_data;
143	struct msn_switchboard *sb;
144	GSList *l;
145
146	for( l = md->switchboards; l; l = l->next )
147	{
148	sb = l->data;
149	if( sb->chat == c )
150	return( sb );
151	}
152
153	return( NULL );
154	}
155
156	struct msn_switchboard msn_sb_spare( struct im_connection ic )
157	{
158	struct msn_data *md = ic->proto_data;
159	struct msn_switchboard *sb;
160	GSList *l;
161
162	for( l = md->switchboards; l; l = l->next )
163	{
164	sb = l->data;
165	if( !sb->who && !sb->chat )
166	return( sb );
167	}
168
169	return( NULL );
170	}
171
172	int msn_sb_sendmessage( struct msn_switchboard sb, char text )
173	{
174	if( sb->ready )
175	{
176	char *buf;
177	int i, j;
178
179	/* Build the message. Convert LF to CR-LF for normal messages. */
180	if( strcmp( text, TYPING_NOTIFICATION_MESSAGE ) == 0 )
181	{
182	i = strlen( MSN_TYPING_HEADERS ) + strlen( sb->ic->acc->user );
183	buf = g_new0( char, i );
184	i = g_snprintf( buf, i, MSN_TYPING_HEADERS, sb->ic->acc->user );
185	}
186	else if( strcmp( text, SB_KEEPALIVE_MESSAGE ) == 0 )
187	{
188	buf = g_strdup( SB_KEEPALIVE_HEADERS );
189	i = strlen( buf );
190	}
191	else if( strncmp( text, MSN_INVITE_HEADERS, sizeof( MSN_INVITE_HEADERS ) - 1 ) == 0 )
192	{
193	buf = g_strdup( text );
194	i = strlen( buf );
195	}
196	else
197	{
198	buf = g_new0( char, sizeof( MSN_MESSAGE_HEADERS ) + strlen( text ) * 2 + 1 );
199	i = strlen( MSN_MESSAGE_HEADERS );
200
201	strcpy( buf, MSN_MESSAGE_HEADERS );
202	for( j = 0; text[j]; j ++ )
203	{
204	if( text[j] == '\n' )
205	buf[i++] = '\r';
206
207	buf[i++] = text[j];
208	}
209	}
210
211	/* Build the final packet (MSG command + the message). */
212	if( msn_sb_write( sb, "MSG %d N %d\r\n%s", ++sb->trId, i, buf ) )
213	{
214	g_free( buf );
215	return 1;
216	}
217	else
218	{
219	g_free( buf );
220	return 0;
221	}
222	}
223	else if( sb->who )
224	{
225	struct msn_message *m = g_new0( struct msn_message, 1 );
226
227	m->who = g_strdup( "" );
228	m->text = g_strdup( text );
229	sb->msgq = g_slist_append( sb->msgq, m );
230
231	return( 1 );
232	}
233	else
234	{
235	return( 0 );
236	}
237	}
238
239	struct groupchat msn_sb_to_chat( struct msn_switchboard sb )
240	{
241	struct im_connection *ic = sb->ic;
242	struct groupchat *c = NULL;
243	char buf[1024];
244
245	/* Create the groupchat structure. */
246	g_snprintf( buf, sizeof( buf ), "MSN groupchat session %d", sb->session );
247	if( sb->who )
248	c = bee_chat_by_title( ic->bee, ic, sb->who );
249	if( c && !msn_sb_by_chat( c ) )
250	sb->chat = c;
251	else
252	sb->chat = imcb_chat_new( ic, buf );
253
254	/* Populate the channel. */
255	if( sb->who ) imcb_chat_add_buddy( sb->chat, sb->who );
256	imcb_chat_add_buddy( sb->chat, ic->acc->user );
257
258	/* And make sure the switchboard doesn't look like a regular chat anymore. */
259	if( sb->who )
260	{
261	g_free( sb->who );
262	sb->who = NULL;
263	}
264
265	return sb->chat;
266	}
267
268	void msn_sb_destroy( struct msn_switchboard *sb )
269	{
270	struct im_connection *ic = sb->ic;
271	struct msn_data *md = ic->proto_data;
272
273	debug( "Destroying switchboard: %s", sb->who ? sb->who : sb->key ? sb->key : "" );
274
275	msn_msgq_purge( ic, &sb->msgq );
276	msn_sb_stop_keepalives( sb );
277
278	if( sb->key ) g_free( sb->key );
279	if( sb->who ) g_free( sb->who );
280
281	if( sb->chat )
282	{
283	imcb_chat_free( sb->chat );
284	}
285
286	if( sb->handler )
287	{
288	if( sb->handler->rxq ) g_free( sb->handler->rxq );
289	if( sb->handler->cmd_text ) g_free( sb->handler->cmd_text );
290	g_free( sb->handler );
291	}
292
293	if( sb->inp ) b_event_remove( sb->inp );
294	closesocket( sb->fd );
295
296	msn_switchboards = g_slist_remove( msn_switchboards, sb );
297	md->switchboards = g_slist_remove( md->switchboards, sb );
298	g_free( sb );
299	}
300
301	gboolean msn_sb_connected( gpointer data, gint source, b_input_condition cond )
302	{
303	struct msn_switchboard *sb = data;
304	struct im_connection *ic;
305	struct msn_data *md;
306	char buf[1024];
307
308	/* Are we still alive? */
309	if( !g_slist_find( msn_switchboards, sb ) )
310	return FALSE;
311
312	ic = sb->ic;
313	md = ic->proto_data;
314
315	if( source != sb->fd )
316	{
317	debug( "Error %d while connecting to switchboard server", 1 );
318	msn_sb_destroy( sb );
319	return FALSE;
320	}
321
322	/* Prepare the callback */
323	sb->handler = g_new0( struct msn_handler_data, 1 );
324	sb->handler->fd = sb->fd;
325	sb->handler->rxq = g_new0( char, 1 );
326	sb->handler->data = sb;
327	sb->handler->exec_command = msn_sb_command;
328	sb->handler->exec_message = msn_sb_message;
329
330	if( sb->session == MSN_SB_NEW )
331	g_snprintf( buf, sizeof( buf ), "USR %d %s %s\r\n", ++sb->trId, ic->acc->user, sb->key );
332	else
333	g_snprintf( buf, sizeof( buf ), "ANS %d %s %s %d\r\n", ++sb->trId, ic->acc->user, sb->key, sb->session );
334
335	if( msn_sb_write( sb, "%s", buf ) )
336	sb->inp = b_input_add( sb->fd, B_EV_IO_READ, msn_sb_callback, sb );
337	else
338	debug( "Error %d while connecting to switchboard server", 2 );
339
340	return FALSE;
341	}
342
343	static gboolean msn_sb_callback( gpointer data, gint source, b_input_condition cond )
344	{
345	struct msn_switchboard *sb = data;
346	struct im_connection *ic = sb->ic;
347	struct msn_data *md = ic->proto_data;
348
349	if( msn_handler( sb->handler ) != -1 )
350	return TRUE;
351
352	if( sb->msgq != NULL )
353	{
354	time_t now = time( NULL );
355
356	if( now - md->first_sb_failure > 600 )
357	{
358	/* It's not really the first one, but the start of this "series".
359	With this, the warning below will be shown only if this happens
360	at least three times in ten minutes. This algorithm isn't
361	perfect, but for this purpose it will do. */
362	md->first_sb_failure = now;
363	md->sb_failures = 0;
364	}
365
366	debug( "Error: Switchboard died" );
367	if( ++ md->sb_failures >= 3 )
368	imcb_log( ic, "Warning: Many switchboard failures on MSN connection. "
369	"There might be problems delivering your messages." );
370
371	if( md->msgq == NULL )
372	{
373	md->msgq = sb->msgq;
374	}
375	else
376	{
377	GSList *l;
378
379	for( l = md->msgq; l->next; l = l->next );
380	l->next = sb->msgq;
381	}
382	sb->msgq = NULL;
383
384	debug( "Moved queued messages back to the main queue, "
385	"creating a new switchboard to retry." );
386	if( !msn_ns_write( ic, -1, "XFR %d SB\r\n", ++md->trId ) )
387	return FALSE;
388	}
389
390	msn_sb_destroy( sb );
391	return FALSE;
392	}
393
394	static int msn_sb_command( struct msn_handler_data handler, char *cmd, int num_parts )
395	{
396	struct msn_switchboard *sb = handler->data;
397	struct im_connection *ic = sb->ic;
398
399	if( !num_parts )
400	{
401	/* Hrrm... Empty command...? Ignore? */
402	return( 1 );
403	}
404
405	if( strcmp( cmd[0], "XFR" ) == 0 )
406	{
407	imcb_error( ic, "Received an XFR from a switchboard server, unable to comply! This is likely to be a bug, please report it!" );
408	imc_logout( ic, TRUE );
409	return( 0 );
410	}
411	else if( strcmp( cmd[0], "USR" ) == 0 )
412	{
413	if( num_parts < 5 )
414	{
415	msn_sb_destroy( sb );
416	return( 0 );
417	}
418
419	if( strcmp( cmd[2], "OK" ) != 0 )
420	{
421	msn_sb_destroy( sb );
422	return( 0 );
423	}
424
425	if( sb->who )
426	return msn_sb_write( sb, "CAL %d %s\r\n", ++sb->trId, sb->who );
427	else
428	debug( "Just created a switchboard, but I don't know what to do with it." );
429	}
430	else if( strcmp( cmd[0], "IRO" ) == 0 )
431	{
432	int num, tot;
433
434	if( num_parts < 6 )
435	{
436	msn_sb_destroy( sb );
437	return( 0 );
438	}
439
440	num = atoi( cmd[2] );
441	tot = atoi( cmd[3] );
442
443	if( tot <= 0 )
444	{
445	msn_sb_destroy( sb );
446	return( 0 );
447	}
448	else if( tot > 1 )
449	{
450	char buf[1024];
451
452	if( num == 1 )
453	{
454	g_snprintf( buf, sizeof( buf ), "MSN groupchat session %d", sb->session );
455	sb->chat = imcb_chat_new( ic, buf );
456
457	g_free( sb->who );
458	sb->who = NULL;
459	}
460
461	imcb_chat_add_buddy( sb->chat, cmd[4] );
462
463	if( num == tot )
464	{
465	imcb_chat_add_buddy( sb->chat, ic->acc->user );
466	}
467	}
468	}
469	else if( strcmp( cmd[0], "ANS" ) == 0 )
470	{
471	if( num_parts < 3 )
472	{
473	msn_sb_destroy( sb );
474	return( 0 );
475	}
476
477	if( strcmp( cmd[2], "OK" ) != 0 )
478	{
479	debug( "Switchboard server sent a negative ANS reply" );
480	msn_sb_destroy( sb );
481	return( 0 );
482	}
483
484	sb->ready = 1;
485
486	msn_sb_start_keepalives( sb, FALSE );
487	}
488	else if( strcmp( cmd[0], "CAL" ) == 0 )
489	{
490	if( num_parts < 4 \|\| !isdigit( cmd[3][0] ) )
491	{
492	msn_sb_destroy( sb );
493	return( 0 );
494	}
495
496	sb->session = atoi( cmd[3] );
497	}
498	else if( strcmp( cmd[0], "JOI" ) == 0 )
499	{
500	if( num_parts < 3 )
501	{
502	msn_sb_destroy( sb );
503	return( 0 );
504	}
505
506	if( sb->who && g_strcasecmp( cmd[1], sb->who ) == 0 )
507	{
508	/* The user we wanted to talk to is finally there, let's send the queued messages then. */
509	struct msn_message *m;
510	GSList *l;
511	int st = 1;
512
513	debug( "%s arrived in the switchboard session, now sending queued message(s)", cmd[1] );
514
515	/* Without this, sendmessage() will put everything back on the queue... */
516	sb->ready = 1;
517
518	while( ( l = sb->msgq ) )
519	{
520	m = l->data;
521	if( st )
522	{
523	/* This hack is meant to convert a regular new chat into a groupchat */
524	if( strcmp( m->text, GROUPCHAT_SWITCHBOARD_MESSAGE ) == 0 )
525	msn_sb_to_chat( sb );
526	else
527	st = msn_sb_sendmessage( sb, m->text );
528	}
529	g_free( m->text );
530	g_free( m->who );
531	g_free( m );
532
533	sb->msgq = g_slist_remove( sb->msgq, m );
534	}
535
536	msn_sb_start_keepalives( sb, FALSE );
537
538	return( st );
539	}
540	else if( sb->who )
541	{
542	debug( "Converting chat with %s to a groupchat because %s joined the session.", sb->who, cmd[1] );
543
544	/* This SB is a one-to-one chat right now, but someone else is joining. */
545	msn_sb_to_chat( sb );
546
547	imcb_chat_add_buddy( sb->chat, cmd[1] );
548	}
549	else if( sb->chat )
550	{
551	imcb_chat_add_buddy( sb->chat, cmd[1] );
552	sb->ready = 1;
553	}
554	else
555	{
556	/* PANIC! */
557	}
558	}
559	else if( strcmp( cmd[0], "MSG" ) == 0 )
560	{
561	if( num_parts < 4 )
562	{
563	msn_sb_destroy( sb );
564	return( 0 );
565	}
566
567	sb->handler->msglen = atoi( cmd[3] );
568
569	if( sb->handler->msglen <= 0 )
570	{
571	debug( "Received a corrupted message on the switchboard, the switchboard will be closed" );
572	msn_sb_destroy( sb );
573	return( 0 );
574	}
575	}
576	else if( strcmp( cmd[0], "NAK" ) == 0 )
577	{
578	if( sb->who )
579	{
580	imcb_log( ic, "The MSN servers could not deliver one of your messages to %s.", sb->who );
581	}
582	else
583	{
584	imcb_log( ic, "The MSN servers could not deliver one of your groupchat messages to all participants." );
585	}
586	}
587	else if( strcmp( cmd[0], "BYE" ) == 0 )
588	{
589	if( num_parts < 2 )
590	{
591	msn_sb_destroy( sb );
592	return( 0 );
593	}
594
595	/* if( cmd[2] && cmd[2] == '1' ) -=> Chat is being cleaned up because of idleness /
596
597	if( sb->who )
598	{
599	msn_sb_stop_keepalives( sb );
600
601	/* This is a single-person chat, and the other person is leaving. */
602	g_free( sb->who );
603	sb->who = NULL;
604	sb->ready = 0;
605
606	debug( "Person %s left the one-to-one switchboard connection. Keeping it around as a spare...", cmd[1] );
607
608	/* We could clean up the switchboard now, but keeping it around
609	as a spare for a next conversation sounds more sane to me.
610	The server will clean it up when it's idle for too long. */
611	}
612	else if( sb->chat )
613	{
614	imcb_chat_remove_buddy( sb->chat, cmd[1], "" );
615	}
616	else
617	{
618	/* PANIC! */
619	}
620	}
621	else if( isdigit( cmd[0][0] ) )
622	{
623	int num = atoi( cmd[0] );
624	const struct msn_status_code *err = msn_status_by_number( num );
625
626	/* If the person is offline, send an offline message instead,
627	and don't report an error. */
628	if( num == 217 )
629	msn_soap_oim_send_queue( ic, &sb->msgq );
630	else
631	imcb_error( ic, "Error reported by switchboard server: %s", err->text );
632
633	if( err->flags & STATUS_SB_FATAL )
634	{
635	msn_sb_destroy( sb );
636	return 0;
637	}
638	else if( err->flags & STATUS_FATAL )
639	{
640	imc_logout( ic, TRUE );
641	return 0;
642	}
643	else if( err->flags & STATUS_SB_IM_SPARE )
644	{
645	if( sb->who )
646	{
647	/* Apparently some invitation failed. We might want to use this
648	board later, so keep it as a spare. */
649	g_free( sb->who );
650	sb->who = NULL;
651
652	/* Also clear the msgq, otherwise someone else might get them. */
653	msn_msgq_purge( ic, &sb->msgq );
654	}
655
656	/* Do NOT return 0 here, we want to keep this sb. */
657	}
658	}
659	else
660	{
661	/* debug( "Received unknown command from switchboard server: %s", cmd[0] ); */
662	}
663
664	return( 1 );
665	}
666
667	static int msn_sb_message( struct msn_handler_data handler, char msg, int msglen, char **cmd, int num_parts )
668	{
669	struct msn_switchboard *sb = handler->data;
670	struct im_connection *ic = sb->ic;
671	char *body;
672	int blen = 0;
673
674	if( !num_parts )
675	return( 1 );
676
677	if( ( body = strstr( msg, "\r\n\r\n" ) ) )
678	{
679	body += 4;
680	blen = msglen - ( body - msg );
681	}
682
683	if( strcmp( cmd[0], "MSG" ) == 0 )
684	{
685	char *ct = msn_findheader( msg, "Content-Type:", msglen );
686
687	if( !ct )
688	return( 1 );
689
690	if( g_strncasecmp( ct, "text/plain", 10 ) == 0 )
691	{
692	g_free( ct );
693
694	if( !body )
695	return( 1 );
696
697	if( sb->who )
698	{
699	imcb_buddy_msg( ic, cmd[1], body, 0, 0 );
700	}
701	else if( sb->chat )
702	{
703	imcb_chat_msg( sb->chat, cmd[1], body, 0, 0 );
704	}
705	else
706	{
707	/* PANIC! */
708	}
709	}
710	#if 0
711	// Disable MSN ft support for now.
712	else if( g_strncasecmp( ct, "text/x-msmsgsinvite", 19 ) == 0 )
713	{
714	char *command = msn_findheader( body, "Invitation-Command:", blen );
715	char *cookie = msn_findheader( body, "Invitation-Cookie:", blen );
716	unsigned int icookie;
717
718	g_free( ct );
719
720	/* Every invite should have both a Command and Cookie header */
721	if( !command \|\| !cookie ) {
722	g_free( command );
723	g_free( cookie );
724	imcb_log( ic, "Warning: No command or cookie from %s", sb->who );
725	return 1;
726	}
727
728	icookie = strtoul( cookie, NULL, 10 );
729	g_free( cookie );
730
731	if( g_strncasecmp( command, "INVITE", 6 ) == 0 ) {
732	msn_invitation_invite( sb, cmd[1], icookie, body, blen );
733	} else if( g_strncasecmp( command, "ACCEPT", 6 ) == 0 ) {
734	msn_invitation_accept( sb, cmd[1], icookie, body, blen );
735	} else if( g_strncasecmp( command, "CANCEL", 6 ) == 0 ) {
736	msn_invitation_cancel( sb, cmd[1], icookie, body, blen );
737	} else {
738	imcb_log( ic, "Warning: Received invalid invitation with "
739	"command %s from %s", command, sb->who );
740	}
741
742	g_free( command );
743	}
744	#endif
745	else if( g_strncasecmp( ct, "application/x-msnmsgrp2p", 24 ) == 0 )
746	{
747	/* Not currently implemented. Don't warn about it since
748	this seems to be used for avatars now. */
749	g_free( ct );
750	}
751	else if( g_strncasecmp( ct, "text/x-msmsgscontrol", 20 ) == 0 )
752	{
753	char *who = msn_findheader( msg, "TypingUser:", msglen );
754
755	if( who )
756	{
757	imcb_buddy_typing( ic, who, OPT_TYPING );
758	g_free( who );
759	}
760
761	g_free( ct );
762	}
763	else
764	{
765	g_free( ct );
766	}
767	}
768
769	return( 1 );
770	}
771
772	static gboolean msn_sb_keepalive( gpointer data, gint source, b_input_condition cond )
773	{
774	struct msn_switchboard *sb = data;
775	return sb->ready && msn_sb_sendmessage( sb, SB_KEEPALIVE_MESSAGE );
776	}
777
778	void msn_sb_start_keepalives( struct msn_switchboard *sb, gboolean initial )
779	{
780	bee_user_t *bu;
781
782	if( sb && sb->who && sb->keepalive == 0 &&
783	( bu = bee_user_by_handle( sb->ic->bee, sb->ic, sb->who ) ) &&
784	!( bu->flags & BEE_USER_ONLINE ) &&
785	set_getbool( &sb->ic->acc->set, "switchboard_keepalives" ) )
786	{
787	if( initial )
788	msn_sb_keepalive( sb, 0, 0 );
789
790	sb->keepalive = b_timeout_add( 20000, msn_sb_keepalive, sb );
791	}
792	}
793
794	void msn_sb_stop_keepalives( struct msn_switchboard *sb )
795	{
796	if( sb && sb->keepalive > 0 )
797	{
798	b_event_remove( sb->keepalive );
799	sb->keepalive = 0;
800	}
801	}

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