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source: protocols/msn/sb.c @ 6ddb223

Last change on this file since 6ddb223 was 4e4af1b, checked in by Wilmer van der Gaast <wilmer@…>, at 2010-08-14T08:48:46Z
Remove some old Passport stuff, this is all in soap.[ch] now.
Property mode set to `100644`
File size: 18.8 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( 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	if( getenv( "BITLBEE_DEBUG" ) )
42	{
43	write( 2, "->SB:", 5 );
44	write( 2, s, len );
45	}
46
47	st = write( sb->fd, s, len );
48	if( st != len )
49	{
50	msn_sb_destroy( sb );
51	return( 0 );
52	}
53
54	return( 1 );
55	}
56
57	int msn_sb_write_msg( struct im_connection ic, struct msn_message m )
58	{
59	struct msn_data *md = ic->proto_data;
60	struct msn_switchboard *sb;
61	char buf[1024];
62
63	/* FIXME: CHECK the reliability of using spare sb's! */
64	if( ( sb = msn_sb_spare( ic ) ) )
65	{
66	debug( "Trying to use a spare switchboard to message %s", m->who );
67
68	sb->who = g_strdup( m->who );
69	g_snprintf( buf, sizeof( buf ), "CAL %d %s\r\n", ++sb->trId, m->who );
70	if( msn_sb_write( sb, buf, strlen( buf ) ) )
71	{
72	/* He/She should join the switchboard soon, let's queue the message. */
73	sb->msgq = g_slist_append( sb->msgq, m );
74	return( 1 );
75	}
76	}
77
78	debug( "Creating a new switchboard to message %s", m->who );
79
80	/* If we reach this line, there was no spare switchboard, so let's make one. */
81	g_snprintf( buf, sizeof( buf ), "XFR %d SB\r\n", ++md->trId );
82	if( !msn_write( ic, buf, strlen( buf ) ) )
83	{
84	g_free( m->who );
85	g_free( m->text );
86	g_free( m );
87
88	return( 0 );
89	}
90
91	/* And queue the message to md. We'll pick it up when the switchboard comes up. */
92	md->msgq = g_slist_append( md->msgq, m );
93
94	/* FIXME: If the switchboard creation fails, the message will not be sent. */
95
96	return( 1 );
97	}
98
99	struct msn_switchboard msn_sb_create( struct im_connection ic, char host, int port, char key, int session )
100	{
101	struct msn_data *md = ic->proto_data;
102	struct msn_switchboard *sb = g_new0( struct msn_switchboard, 1 );
103
104	sb->fd = proxy_connect( host, port, msn_sb_connected, sb );
105	if( sb->fd < 0 )
106	{
107	g_free( sb );
108	return( NULL );
109	}
110
111	sb->ic = ic;
112	sb->key = g_strdup( key );
113	sb->session = session;
114
115	msn_switchboards = g_slist_append( msn_switchboards, sb );
116	md->switchboards = g_slist_append( md->switchboards, sb );
117
118	return( sb );
119	}
120
121	struct msn_switchboard msn_sb_by_handle( struct im_connection ic, char *handle )
122	{
123	struct msn_data *md = ic->proto_data;
124	struct msn_switchboard *sb;
125	GSList *l;
126
127	for( l = md->switchboards; l; l = l->next )
128	{
129	sb = l->data;
130	if( sb->who && strcmp( sb->who, handle ) == 0 )
131	return( sb );
132	}
133
134	return( NULL );
135	}
136
137	struct msn_switchboard msn_sb_by_chat( struct groupchat c )
138	{
139	struct msn_data *md = c->ic->proto_data;
140	struct msn_switchboard *sb;
141	GSList *l;
142
143	for( l = md->switchboards; l; l = l->next )
144	{
145	sb = l->data;
146	if( sb->chat == c )
147	return( sb );
148	}
149
150	return( NULL );
151	}
152
153	struct msn_switchboard msn_sb_spare( struct im_connection ic )
154	{
155	struct msn_data *md = ic->proto_data;
156	struct msn_switchboard *sb;
157	GSList *l;
158
159	for( l = md->switchboards; l; l = l->next )
160	{
161	sb = l->data;
162	if( !sb->who && !sb->chat )
163	return( sb );
164	}
165
166	return( NULL );
167	}
168
169	int msn_sb_sendmessage( struct msn_switchboard sb, char text )
170	{
171	if( sb->ready )
172	{
173	char packet, buf;
174	int i, j;
175
176	/* Build the message. Convert LF to CR-LF for normal messages. */
177	if( strcmp( text, TYPING_NOTIFICATION_MESSAGE ) == 0 )
178	{
179	i = strlen( MSN_TYPING_HEADERS ) + strlen( sb->ic->acc->user );
180	buf = g_new0( char, i );
181	i = g_snprintf( buf, i, MSN_TYPING_HEADERS, sb->ic->acc->user );
182	}
183	else if( strcmp( text, SB_KEEPALIVE_MESSAGE ) == 0 )
184	{
185	buf = g_strdup( SB_KEEPALIVE_HEADERS );
186	i = strlen( buf );
187	}
188	else if( strncmp( text, MSN_INVITE_HEADERS, sizeof( MSN_INVITE_HEADERS ) - 1 ) == 0 )
189	{
190	buf = g_strdup( text );
191	i = strlen( buf );
192	}
193	else
194	{
195	buf = g_new0( char, sizeof( MSN_MESSAGE_HEADERS ) + strlen( text ) * 2 + 1 );
196	i = strlen( MSN_MESSAGE_HEADERS );
197
198	strcpy( buf, MSN_MESSAGE_HEADERS );
199	for( j = 0; text[j]; j ++ )
200	{
201	if( text[j] == '\n' )
202	buf[i++] = '\r';
203
204	buf[i++] = text[j];
205	}
206	}
207
208	/* Build the final packet (MSG command + the message). */
209	packet = g_strdup_printf( "MSG %d N %d\r\n%s", ++sb->trId, i, buf );
210	g_free( buf );
211	if( msn_sb_write( sb, packet, strlen( packet ) ) )
212	{
213	g_free( packet );
214	return( 1 );
215	}
216	else
217	{
218	g_free( packet );
219	return( 0 );
220	}
221	}
222	else if( sb->who )
223	{
224	struct msn_message *m = g_new0( struct msn_message, 1 );
225
226	m->who = g_strdup( "" );
227	m->text = g_strdup( text );
228	sb->msgq = g_slist_append( sb->msgq, m );
229
230	return( 1 );
231	}
232	else
233	{
234	return( 0 );
235	}
236	}
237
238	struct groupchat msn_sb_to_chat( struct msn_switchboard sb )
239	{
240	struct im_connection *ic = sb->ic;
241	struct groupchat *c = NULL;
242	char buf[1024];
243
244	/* Create the groupchat structure. */
245	g_snprintf( buf, sizeof( buf ), "MSN groupchat session %d", sb->session );
246	if( sb->who )
247	c = bee_chat_by_title( ic->bee, ic, sb->who );
248	if( c && !msn_sb_by_chat( c ) )
249	sb->chat = c;
250	else
251	sb->chat = imcb_chat_new( ic, buf );
252
253	/* Populate the channel. */
254	if( sb->who ) imcb_chat_add_buddy( sb->chat, sb->who );
255	imcb_chat_add_buddy( sb->chat, ic->acc->user );
256
257	/* And make sure the switchboard doesn't look like a regular chat anymore. */
258	if( sb->who )
259	{
260	g_free( sb->who );
261	sb->who = NULL;
262	}
263
264	return sb->chat;
265	}
266
267	void msn_sb_destroy( struct msn_switchboard *sb )
268	{
269	struct im_connection *ic = sb->ic;
270	struct msn_data *md = ic->proto_data;
271
272	debug( "Destroying switchboard: %s", sb->who ? sb->who : sb->key ? sb->key : "" );
273
274	msn_msgq_purge( ic, &sb->msgq );
275	msn_sb_stop_keepalives( sb );
276
277	if( sb->key ) g_free( sb->key );
278	if( sb->who ) g_free( sb->who );
279
280	if( sb->chat )
281	{
282	imcb_chat_free( sb->chat );
283	}
284
285	if( sb->handler )
286	{
287	if( sb->handler->rxq ) g_free( sb->handler->rxq );
288	if( sb->handler->cmd_text ) g_free( sb->handler->cmd_text );
289	g_free( sb->handler );
290	}
291
292	if( sb->inp ) b_event_remove( sb->inp );
293	closesocket( sb->fd );
294
295	msn_switchboards = g_slist_remove( msn_switchboards, sb );
296	md->switchboards = g_slist_remove( md->switchboards, sb );
297	g_free( sb );
298	}
299
300	gboolean msn_sb_connected( gpointer data, gint source, b_input_condition cond )
301	{
302	struct msn_switchboard *sb = data;
303	struct im_connection *ic;
304	struct msn_data *md;
305	char buf[1024];
306
307	/* Are we still alive? */
308	if( !g_slist_find( msn_switchboards, sb ) )
309	return FALSE;
310
311	ic = sb->ic;
312	md = ic->proto_data;
313
314	if( source != sb->fd )
315	{
316	debug( "Error %d while connecting to switchboard server", 1 );
317	msn_sb_destroy( sb );
318	return FALSE;
319	}
320
321	/* Prepare the callback */
322	sb->handler = g_new0( struct msn_handler_data, 1 );
323	sb->handler->fd = sb->fd;
324	sb->handler->rxq = g_new0( char, 1 );
325	sb->handler->data = sb;
326	sb->handler->exec_command = msn_sb_command;
327	sb->handler->exec_message = msn_sb_message;
328
329	if( sb->session == MSN_SB_NEW )
330	g_snprintf( buf, sizeof( buf ), "USR %d %s %s\r\n", ++sb->trId, ic->acc->user, sb->key );
331	else
332	g_snprintf( buf, sizeof( buf ), "ANS %d %s %s %d\r\n", ++sb->trId, ic->acc->user, sb->key, sb->session );
333
334	if( msn_sb_write( sb, buf, strlen( buf ) ) )
335	sb->inp = b_input_add( sb->fd, B_EV_IO_READ, msn_sb_callback, sb );
336	else
337	debug( "Error %d while connecting to switchboard server", 2 );
338
339	return FALSE;
340	}
341
342	static gboolean msn_sb_callback( gpointer data, gint source, b_input_condition cond )
343	{
344	struct msn_switchboard *sb = data;
345	struct im_connection *ic = sb->ic;
346	struct msn_data *md = ic->proto_data;
347
348	if( msn_handler( sb->handler ) != -1 )
349	return TRUE;
350
351	if( sb->msgq != NULL )
352	{
353	time_t now = time( NULL );
354	char buf[1024];
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	g_snprintf( buf, sizeof( buf ), "XFR %d SB\r\n", ++md->trId );
387	if( !msn_write( ic, buf, strlen( buf ) ) )
388	return FALSE;
389	}
390
391	msn_sb_destroy( sb );
392	return FALSE;
393	}
394
395	static int msn_sb_command( gpointer data, char **cmd, int num_parts )
396	{
397	struct msn_switchboard *sb = data;
398	struct im_connection *ic = sb->ic;
399	char buf[1024];
400
401	if( !num_parts )
402	{
403	/* Hrrm... Empty command...? Ignore? */
404	return( 1 );
405	}
406
407	if( strcmp( cmd[0], "XFR" ) == 0 )
408	{
409	imcb_error( ic, "Received an XFR from a switchboard server, unable to comply! This is likely to be a bug, please report it!" );
410	imc_logout( ic, TRUE );
411	return( 0 );
412	}
413	else if( strcmp( cmd[0], "USR" ) == 0 )
414	{
415	if( num_parts < 5 )
416	{
417	msn_sb_destroy( sb );
418	return( 0 );
419	}
420
421	if( strcmp( cmd[2], "OK" ) != 0 )
422	{
423	msn_sb_destroy( sb );
424	return( 0 );
425	}
426
427	if( sb->who )
428	{
429	g_snprintf( buf, sizeof( buf ), "CAL %d %s\r\n", ++sb->trId, sb->who );
430	return( msn_sb_write( sb, buf, strlen( buf ) ) );
431	}
432	else
433	{
434	debug( "Just created a switchboard, but I don't know what to do with it." );
435	}
436	}
437	else if( strcmp( cmd[0], "IRO" ) == 0 )
438	{
439	int num, tot;
440
441	if( num_parts < 6 )
442	{
443	msn_sb_destroy( sb );
444	return( 0 );
445	}
446
447	num = atoi( cmd[2] );
448	tot = atoi( cmd[3] );
449
450	if( tot <= 0 )
451	{
452	msn_sb_destroy( sb );
453	return( 0 );
454	}
455	else if( tot > 1 )
456	{
457	char buf[1024];
458
459	if( num == 1 )
460	{
461	g_snprintf( buf, sizeof( buf ), "MSN groupchat session %d", sb->session );
462	sb->chat = imcb_chat_new( ic, buf );
463
464	g_free( sb->who );
465	sb->who = NULL;
466	}
467
468	imcb_chat_add_buddy( sb->chat, cmd[4] );
469
470	if( num == tot )
471	{
472	imcb_chat_add_buddy( sb->chat, ic->acc->user );
473	}
474	}
475	}
476	else if( strcmp( cmd[0], "ANS" ) == 0 )
477	{
478	if( num_parts < 3 )
479	{
480	msn_sb_destroy( sb );
481	return( 0 );
482	}
483
484	if( strcmp( cmd[2], "OK" ) != 0 )
485	{
486	debug( "Switchboard server sent a negative ANS reply" );
487	msn_sb_destroy( sb );
488	return( 0 );
489	}
490
491	sb->ready = 1;
492
493	msn_sb_start_keepalives( sb, FALSE );
494	}
495	else if( strcmp( cmd[0], "CAL" ) == 0 )
496	{
497	if( num_parts < 4 \|\| !isdigit( cmd[3][0] ) )
498	{
499	msn_sb_destroy( sb );
500	return( 0 );
501	}
502
503	sb->session = atoi( cmd[3] );
504	}
505	else if( strcmp( cmd[0], "JOI" ) == 0 )
506	{
507	if( num_parts < 3 )
508	{
509	msn_sb_destroy( sb );
510	return( 0 );
511	}
512
513	if( sb->who && g_strcasecmp( cmd[1], sb->who ) == 0 )
514	{
515	/* The user we wanted to talk to is finally there, let's send the queued messages then. */
516	struct msn_message *m;
517	GSList *l;
518	int st = 1;
519
520	debug( "%s arrived in the switchboard session, now sending queued message(s)", cmd[1] );
521
522	/* Without this, sendmessage() will put everything back on the queue... */
523	sb->ready = 1;
524
525	while( ( l = sb->msgq ) )
526	{
527	m = l->data;
528	if( st )
529	{
530	/* This hack is meant to convert a regular new chat into a groupchat */
531	if( strcmp( m->text, GROUPCHAT_SWITCHBOARD_MESSAGE ) == 0 )
532	msn_sb_to_chat( sb );
533	else
534	st = msn_sb_sendmessage( sb, m->text );
535	}
536	g_free( m->text );
537	g_free( m->who );
538	g_free( m );
539
540	sb->msgq = g_slist_remove( sb->msgq, m );
541	}
542
543	msn_sb_start_keepalives( sb, FALSE );
544
545	return( st );
546	}
547	else if( sb->who )
548	{
549	debug( "Converting chat with %s to a groupchat because %s joined the session.", sb->who, cmd[1] );
550
551	/* This SB is a one-to-one chat right now, but someone else is joining. */
552	msn_sb_to_chat( sb );
553
554	imcb_chat_add_buddy( sb->chat, cmd[1] );
555	}
556	else if( sb->chat )
557	{
558	imcb_chat_add_buddy( sb->chat, cmd[1] );
559	sb->ready = 1;
560	}
561	else
562	{
563	/* PANIC! */
564	}
565	}
566	else if( strcmp( cmd[0], "MSG" ) == 0 )
567	{
568	if( num_parts < 4 )
569	{
570	msn_sb_destroy( sb );
571	return( 0 );
572	}
573
574	sb->handler->msglen = atoi( cmd[3] );
575
576	if( sb->handler->msglen <= 0 )
577	{
578	debug( "Received a corrupted message on the switchboard, the switchboard will be closed" );
579	msn_sb_destroy( sb );
580	return( 0 );
581	}
582	}
583	else if( strcmp( cmd[0], "NAK" ) == 0 )
584	{
585	if( sb->who )
586	{
587	imcb_log( ic, "The MSN servers could not deliver one of your messages to %s.", sb->who );
588	}
589	else
590	{
591	imcb_log( ic, "The MSN servers could not deliver one of your groupchat messages to all participants." );
592	}
593	}
594	else if( strcmp( cmd[0], "BYE" ) == 0 )
595	{
596	if( num_parts < 2 )
597	{
598	msn_sb_destroy( sb );
599	return( 0 );
600	}
601
602	/* if( cmd[2] && cmd[2] == '1' ) -=> Chat is being cleaned up because of idleness /
603
604	if( sb->who )
605	{
606	msn_sb_stop_keepalives( sb );
607
608	/* This is a single-person chat, and the other person is leaving. */
609	g_free( sb->who );
610	sb->who = NULL;
611	sb->ready = 0;
612
613	debug( "Person %s left the one-to-one switchboard connection. Keeping it around as a spare...", cmd[1] );
614
615	/* We could clean up the switchboard now, but keeping it around
616	as a spare for a next conversation sounds more sane to me.
617	The server will clean it up when it's idle for too long. */
618	}
619	else if( sb->chat )
620	{
621	imcb_chat_remove_buddy( sb->chat, cmd[1], "" );
622	}
623	else
624	{
625	/* PANIC! */
626	}
627	}
628	else if( isdigit( cmd[0][0] ) )
629	{
630	int num = atoi( cmd[0] );
631	const struct msn_status_code *err = msn_status_by_number( num );
632
633	/* If the person is offline, send an offline message instead,
634	and don't report an error. */
635	if( num == 217 )
636	msn_soap_oim_send_queue( ic, &sb->msgq );
637	else
638	imcb_error( ic, "Error reported by switchboard server: %s", err->text );
639
640	if( err->flags & STATUS_SB_FATAL )
641	{
642	msn_sb_destroy( sb );
643	return 0;
644	}
645	else if( err->flags & STATUS_FATAL )
646	{
647	imc_logout( ic, TRUE );
648	return 0;
649	}
650	else if( err->flags & STATUS_SB_IM_SPARE )
651	{
652	if( sb->who )
653	{
654	/* Apparently some invitation failed. We might want to use this
655	board later, so keep it as a spare. */
656	g_free( sb->who );
657	sb->who = NULL;
658
659	/* Also clear the msgq, otherwise someone else might get them. */
660	msn_msgq_purge( ic, &sb->msgq );
661	}
662
663	/* Do NOT return 0 here, we want to keep this sb. */
664	}
665	}
666	else
667	{
668	/* debug( "Received unknown command from switchboard server: %s", cmd[0] ); */
669	}
670
671	return( 1 );
672	}
673
674	static int msn_sb_message( gpointer data, char msg, int msglen, char *cmd, int num_parts )
675	{
676	struct msn_switchboard *sb = data;
677	struct im_connection *ic = sb->ic;
678	char *body;
679	int blen = 0;
680
681	if( !num_parts )
682	return( 1 );
683
684	if( ( body = strstr( msg, "\r\n\r\n" ) ) )
685	{
686	body += 4;
687	blen = msglen - ( body - msg );
688	}
689
690	if( strcmp( cmd[0], "MSG" ) == 0 )
691	{
692	char *ct = msn_findheader( msg, "Content-Type:", msglen );
693
694	if( !ct )
695	return( 1 );
696
697	if( g_strncasecmp( ct, "text/plain", 10 ) == 0 )
698	{
699	g_free( ct );
700
701	if( !body )
702	return( 1 );
703
704	if( sb->who )
705	{
706	imcb_buddy_msg( ic, cmd[1], body, 0, 0 );
707	}
708	else if( sb->chat )
709	{
710	imcb_chat_msg( sb->chat, cmd[1], body, 0, 0 );
711	}
712	else
713	{
714	/* PANIC! */
715	}
716	}
717	#if 0
718	// Disable MSN ft support for now.
719	else if( g_strncasecmp( ct, "text/x-msmsgsinvite", 19 ) == 0 )
720	{
721	char *command = msn_findheader( body, "Invitation-Command:", blen );
722	char *cookie = msn_findheader( body, "Invitation-Cookie:", blen );
723	unsigned int icookie;
724
725	g_free( ct );
726
727	/* Every invite should have both a Command and Cookie header */
728	if( !command \|\| !cookie ) {
729	g_free( command );
730	g_free( cookie );
731	imcb_log( ic, "Warning: No command or cookie from %s", sb->who );
732	return 1;
733	}
734
735	icookie = strtoul( cookie, NULL, 10 );
736	g_free( cookie );
737
738	if( g_strncasecmp( command, "INVITE", 6 ) == 0 ) {
739	msn_invitation_invite( sb, cmd[1], icookie, body, blen );
740	} else if( g_strncasecmp( command, "ACCEPT", 6 ) == 0 ) {
741	msn_invitation_accept( sb, cmd[1], icookie, body, blen );
742	} else if( g_strncasecmp( command, "CANCEL", 6 ) == 0 ) {
743	msn_invitation_cancel( sb, cmd[1], icookie, body, blen );
744	} else {
745	imcb_log( ic, "Warning: Received invalid invitation with "
746	"command %s from %s", command, sb->who );
747	}
748
749	g_free( command );
750	}
751	#endif
752	else if( g_strncasecmp( ct, "application/x-msnmsgrp2p", 24 ) == 0 )
753	{
754	imcb_error( sb->ic, "Cannot receive file from %s: BitlBee does not "
755	"support msnmsgrp2p yet.", sb->who );
756	g_free( ct );
757	}
758	else if( g_strncasecmp( ct, "text/x-msmsgscontrol", 20 ) == 0 )
759	{
760	char *who = msn_findheader( msg, "TypingUser:", msglen );
761
762	if( who )
763	{
764	imcb_buddy_typing( ic, who, OPT_TYPING );
765	g_free( who );
766	}
767
768	g_free( ct );
769	}
770	else
771	{
772	g_free( ct );
773	}
774	}
775
776	return( 1 );
777	}
778
779	static gboolean msn_sb_keepalive( gpointer data, gint source, b_input_condition cond )
780	{
781	struct msn_switchboard *sb = data;
782	return sb->ready && msn_sb_sendmessage( sb, SB_KEEPALIVE_MESSAGE );
783	}
784
785	void msn_sb_start_keepalives( struct msn_switchboard *sb, gboolean initial )
786	{
787	bee_user_t *bu;
788
789	if( sb && sb->who && sb->keepalive == 0 &&
790	( bu = bee_user_by_handle( sb->ic->bee, sb->ic, sb->who ) ) &&
791	!( bu->flags & BEE_USER_ONLINE ) &&
792	set_getbool( &sb->ic->acc->set, "switchboard_keepalives" ) )
793	{
794	if( initial )
795	msn_sb_keepalive( sb, 0, 0 );
796
797	sb->keepalive = b_timeout_add( 20000, msn_sb_keepalive, sb );
798	}
799	}
800
801	void msn_sb_stop_keepalives( struct msn_switchboard *sb )
802	{
803	if( sb && sb->keepalive > 0 )
804	{
805	b_event_remove( sb->keepalive );
806	sb->keepalive = 0;
807	}
808	}

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