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source: protocols/msn/sb.c @ d1ad6f0

Last change on this file since d1ad6f0 was a830512, checked in by Wilmer van der Gaast <wilmer@…>, at 2008-08-10T09:15:26Z
Added msn_sb_write_msg() (patch from ulim).
Property mode set to `100644`
File size: 17.4 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
32	static gboolean msn_sb_callback( gpointer data, gint source, b_input_condition cond );
33	static int msn_sb_command( gpointer data, char **cmd, int num_parts );
34	static int msn_sb_message( gpointer data, char msg, int msglen, char *cmd, int num_parts );
35
36	int msn_sb_write( struct msn_switchboard sb, char s, int len )
37	{
38	int st;
39
40	st = write( sb->fd, s, len );
41	if( st != len )
42	{
43	msn_sb_destroy( sb );
44	return( 0 );
45	}
46
47	return( 1 );
48	}
49
50	int msn_sb_write_msg( struct im_connection ic, struct msn_message m )
51	{
52	struct msn_data *md = ic->proto_data;
53	struct msn_switchboard *sb;
54	char buf[1024];
55
56	/* FIXME: CHECK the reliability of using spare sb's! */
57	if( ( sb = msn_sb_spare( ic ) ) )
58	{
59	debug( "Trying to use a spare switchboard to message %s", m->who );
60
61	sb->who = g_strdup( m->who );
62	g_snprintf( buf, sizeof( buf ), "CAL %d %s\r\n", ++sb->trId, m->who );
63	if( msn_sb_write( sb, buf, strlen( buf ) ) )
64	{
65	/* He/She should join the switchboard soon, let's queue the message. */
66	sb->msgq = g_slist_append( sb->msgq, m );
67	return( 1 );
68	}
69	}
70
71	debug( "Creating a new switchboard to message %s", m->who );
72
73	/* If we reach this line, there was no spare switchboard, so let's make one. */
74	g_snprintf( buf, sizeof( buf ), "XFR %d SB\r\n", ++md->trId );
75	if( !msn_write( ic, buf, strlen( buf ) ) )
76	{
77	g_free( m->who );
78	g_free( m->text );
79	g_free( m );
80
81	return( 0 );
82	}
83
84	/* And queue the message to md. We'll pick it up when the switchboard comes up. */
85	md->msgq = g_slist_append( md->msgq, m );
86
87	/* FIXME: If the switchboard creation fails, the message will not be sent. */
88
89	return( 1 );
90	}
91
92	struct msn_switchboard msn_sb_create( struct im_connection ic, char host, int port, char key, int session )
93	{
94	struct msn_data *md = ic->proto_data;
95	struct msn_switchboard *sb = g_new0( struct msn_switchboard, 1 );
96
97	sb->fd = proxy_connect( host, port, msn_sb_connected, sb );
98	if( sb->fd < 0 )
99	{
100	g_free( sb );
101	return( NULL );
102	}
103
104	sb->ic = ic;
105	sb->key = g_strdup( key );
106	sb->session = session;
107
108	msn_switchboards = g_slist_append( msn_switchboards, sb );
109	md->switchboards = g_slist_append( md->switchboards, sb );
110
111	return( sb );
112	}
113
114	struct msn_switchboard msn_sb_by_handle( struct im_connection ic, char *handle )
115	{
116	struct msn_data *md = ic->proto_data;
117	struct msn_switchboard *sb;
118	GSList *l;
119
120	for( l = md->switchboards; l; l = l->next )
121	{
122	sb = l->data;
123	if( sb->who && strcmp( sb->who, handle ) == 0 )
124	return( sb );
125	}
126
127	return( NULL );
128	}
129
130	struct msn_switchboard msn_sb_by_chat( struct groupchat c )
131	{
132	struct msn_data *md = c->ic->proto_data;
133	struct msn_switchboard *sb;
134	GSList *l;
135
136	for( l = md->switchboards; l; l = l->next )
137	{
138	sb = l->data;
139	if( sb->chat == c )
140	return( sb );
141	}
142
143	return( NULL );
144	}
145
146	struct msn_switchboard msn_sb_spare( struct im_connection ic )
147	{
148	struct msn_data *md = ic->proto_data;
149	struct msn_switchboard *sb;
150	GSList *l;
151
152	for( l = md->switchboards; l; l = l->next )
153	{
154	sb = l->data;
155	if( !sb->who && !sb->chat )
156	return( sb );
157	}
158
159	return( NULL );
160	}
161
162	int msn_sb_sendmessage( struct msn_switchboard sb, char text )
163	{
164	if( sb->ready )
165	{
166	char packet, buf;
167	int i, j;
168
169	/* Build the message. Convert LF to CR-LF for normal messages. */
170	if( strcmp( text, TYPING_NOTIFICATION_MESSAGE ) != 0 )
171	{
172	buf = g_new0( char, sizeof( MSN_MESSAGE_HEADERS ) + strlen( text ) * 2 + 1 );
173	i = strlen( MSN_MESSAGE_HEADERS );
174
175	strcpy( buf, MSN_MESSAGE_HEADERS );
176	for( j = 0; text[j]; j ++ )
177	{
178	if( text[j] == '\n' )
179	buf[i++] = '\r';
180
181	buf[i++] = text[j];
182	}
183	}
184	else
185	{
186	i = strlen( MSN_TYPING_HEADERS ) + strlen( sb->ic->acc->user );
187	buf = g_new0( char, i );
188	i = g_snprintf( buf, i, MSN_TYPING_HEADERS, sb->ic->acc->user );
189	}
190
191	/* Build the final packet (MSG command + the message). */
192	packet = g_strdup_printf( "MSG %d N %d\r\n%s", ++sb->trId, i, buf );
193	g_free( buf );
194	if( msn_sb_write( sb, packet, strlen( packet ) ) )
195	{
196	g_free( packet );
197	return( 1 );
198	}
199	else
200	{
201	g_free( packet );
202	return( 0 );
203	}
204	}
205	else if( sb->who )
206	{
207	struct msn_message *m = g_new0( struct msn_message, 1 );
208
209	m->who = g_strdup( "" );
210	m->text = g_strdup( text );
211	sb->msgq = g_slist_append( sb->msgq, m );
212
213	return( 1 );
214	}
215	else
216	{
217	return( 0 );
218	}
219	}
220
221	struct groupchat msn_sb_to_chat( struct msn_switchboard sb )
222	{
223	struct im_connection *ic = sb->ic;
224	char buf[1024];
225
226	/* Create the groupchat structure. */
227	g_snprintf( buf, sizeof( buf ), "MSN groupchat session %d", sb->session );
228	sb->chat = imcb_chat_new( ic, buf );
229
230	/* Populate the channel. */
231	if( sb->who ) imcb_chat_add_buddy( sb->chat, sb->who );
232	imcb_chat_add_buddy( sb->chat, ic->acc->user );
233
234	/* And make sure the switchboard doesn't look like a regular chat anymore. */
235	if( sb->who )
236	{
237	g_free( sb->who );
238	sb->who = NULL;
239	}
240
241	return sb->chat;
242	}
243
244	void msn_sb_destroy( struct msn_switchboard *sb )
245	{
246	struct im_connection *ic = sb->ic;
247	struct msn_data *md = ic->proto_data;
248
249	debug( "Destroying switchboard: %s", sb->who ? sb->who : sb->key ? sb->key : "" );
250
251	msn_msgq_purge( ic, &sb->msgq );
252
253	if( sb->key ) g_free( sb->key );
254	if( sb->who ) g_free( sb->who );
255
256	if( sb->chat )
257	{
258	imcb_chat_free( sb->chat );
259	}
260
261	if( sb->handler )
262	{
263	if( sb->handler->rxq ) g_free( sb->handler->rxq );
264	if( sb->handler->cmd_text ) g_free( sb->handler->cmd_text );
265	g_free( sb->handler );
266	}
267
268	if( sb->inp ) b_event_remove( sb->inp );
269	closesocket( sb->fd );
270
271	msn_switchboards = g_slist_remove( msn_switchboards, sb );
272	md->switchboards = g_slist_remove( md->switchboards, sb );
273	g_free( sb );
274	}
275
276	gboolean msn_sb_connected( gpointer data, gint source, b_input_condition cond )
277	{
278	struct msn_switchboard *sb = data;
279	struct im_connection *ic;
280	struct msn_data *md;
281	char buf[1024];
282
283	/* Are we still alive? */
284	if( !g_slist_find( msn_switchboards, sb ) )
285	return FALSE;
286
287	ic = sb->ic;
288	md = ic->proto_data;
289
290	if( source != sb->fd )
291	{
292	debug( "Error %d while connecting to switchboard server", 1 );
293	msn_sb_destroy( sb );
294	return FALSE;
295	}
296
297	/* Prepare the callback */
298	sb->handler = g_new0( struct msn_handler_data, 1 );
299	sb->handler->fd = sb->fd;
300	sb->handler->rxq = g_new0( char, 1 );
301	sb->handler->data = sb;
302	sb->handler->exec_command = msn_sb_command;
303	sb->handler->exec_message = msn_sb_message;
304
305	if( sb->session == MSN_SB_NEW )
306	g_snprintf( buf, sizeof( buf ), "USR %d %s %s\r\n", ++sb->trId, ic->acc->user, sb->key );
307	else
308	g_snprintf( buf, sizeof( buf ), "ANS %d %s %s %d\r\n", ++sb->trId, ic->acc->user, sb->key, sb->session );
309
310	if( msn_sb_write( sb, buf, strlen( buf ) ) )
311	sb->inp = b_input_add( sb->fd, GAIM_INPUT_READ, msn_sb_callback, sb );
312	else
313	debug( "Error %d while connecting to switchboard server", 2 );
314
315	return FALSE;
316	}
317
318	static gboolean msn_sb_callback( gpointer data, gint source, b_input_condition cond )
319	{
320	struct msn_switchboard *sb = data;
321	struct im_connection *ic = sb->ic;
322	struct msn_data *md = ic->proto_data;
323
324	if( msn_handler( sb->handler ) == -1 )
325	{
326	time_t now = time( NULL );
327
328	if( now - md->first_sb_failure > 600 )
329	{
330	/* It's not really the first one, but the start of this "series".
331	With this, the warning below will be shown only if this happens
332	at least three times in ten minutes. This algorithm isn't
333	perfect, but for this purpose it will do. */
334	md->first_sb_failure = now;
335	md->sb_failures = 0;
336	}
337
338	debug( "Error: Switchboard died" );
339	if( ++ md->sb_failures >= 3 )
340	imcb_log( ic, "Warning: Many switchboard failures on MSN connection. "
341	"There might be problems delivering your messages." );
342
343	if( sb->msgq != NULL )
344	{
345	char buf[1024];
346
347	if( md->msgq == NULL )
348	{
349	md->msgq = sb->msgq;
350	}
351	else
352	{
353	GSList *l;
354
355	for( l = md->msgq; l->next; l = l->next );
356	l->next = sb->msgq;
357	}
358	sb->msgq = NULL;
359
360	debug( "Moved queued messages back to the main queue, creating a new switchboard to retry." );
361	g_snprintf( buf, sizeof( buf ), "XFR %d SB\r\n", ++md->trId );
362	if( !msn_write( ic, buf, strlen( buf ) ) )
363	return FALSE;
364	}
365
366	msn_sb_destroy( sb );
367
368	return FALSE;
369	}
370	else
371	{
372	return TRUE;
373	}
374	}
375
376	static int msn_sb_command( gpointer data, char **cmd, int num_parts )
377	{
378	struct msn_switchboard *sb = data;
379	struct im_connection *ic = sb->ic;
380	char buf[1024];
381
382	if( !num_parts )
383	{
384	/* Hrrm... Empty command...? Ignore? */
385	return( 1 );
386	}
387
388	if( strcmp( cmd[0], "XFR" ) == 0 )
389	{
390	imcb_error( ic, "Received an XFR from a switchboard server, unable to comply! This is likely to be a bug, please report it!" );
391	imc_logout( ic, TRUE );
392	return( 0 );
393	}
394	else if( strcmp( cmd[0], "USR" ) == 0 )
395	{
396	if( num_parts != 5 )
397	{
398	msn_sb_destroy( sb );
399	return( 0 );
400	}
401
402	if( strcmp( cmd[2], "OK" ) != 0 )
403	{
404	msn_sb_destroy( sb );
405	return( 0 );
406	}
407
408	if( sb->who )
409	{
410	g_snprintf( buf, sizeof( buf ), "CAL %d %s\r\n", ++sb->trId, sb->who );
411	return( msn_sb_write( sb, buf, strlen( buf ) ) );
412	}
413	else
414	{
415	debug( "Just created a switchboard, but I don't know what to do with it." );
416	}
417	}
418	else if( strcmp( cmd[0], "IRO" ) == 0 )
419	{
420	int num, tot;
421
422	if( num_parts != 6 )
423	{
424	msn_sb_destroy( sb );
425	return( 0 );
426	}
427
428	num = atoi( cmd[2] );
429	tot = atoi( cmd[3] );
430
431	if( tot <= 0 )
432	{
433	msn_sb_destroy( sb );
434	return( 0 );
435	}
436	else if( tot > 1 )
437	{
438	char buf[1024];
439
440	if( num == 1 )
441	{
442	g_snprintf( buf, sizeof( buf ), "MSN groupchat session %d", sb->session );
443	sb->chat = imcb_chat_new( ic, buf );
444
445	g_free( sb->who );
446	sb->who = NULL;
447	}
448
449	imcb_chat_add_buddy( sb->chat, cmd[4] );
450
451	if( num == tot )
452	{
453	imcb_chat_add_buddy( sb->chat, ic->acc->user );
454	}
455	}
456	}
457	else if( strcmp( cmd[0], "ANS" ) == 0 )
458	{
459	if( num_parts != 3 )
460	{
461	msn_sb_destroy( sb );
462	return( 0 );
463	}
464
465	if( strcmp( cmd[2], "OK" ) != 0 )
466	{
467	debug( "Switchboard server sent a negative ANS reply" );
468	msn_sb_destroy( sb );
469	return( 0 );
470	}
471
472	sb->ready = 1;
473	}
474	else if( strcmp( cmd[0], "CAL" ) == 0 )
475	{
476	if( num_parts != 4 \|\| !isdigit( cmd[3][0] ) )
477	{
478	msn_sb_destroy( sb );
479	return( 0 );
480	}
481
482	sb->session = atoi( cmd[3] );
483	}
484	else if( strcmp( cmd[0], "JOI" ) == 0 )
485	{
486	if( num_parts != 3 )
487	{
488	msn_sb_destroy( sb );
489	return( 0 );
490	}
491
492	if( sb->who && g_strcasecmp( cmd[1], sb->who ) == 0 )
493	{
494	/* The user we wanted to talk to is finally there, let's send the queued messages then. */
495	struct msn_message *m;
496	GSList *l;
497	int st = 1;
498
499	debug( "%s arrived in the switchboard session, now sending queued message(s)", cmd[1] );
500
501	/* Without this, sendmessage() will put everything back on the queue... */
502	sb->ready = 1;
503
504	while( ( l = sb->msgq ) )
505	{
506	m = l->data;
507	if( st )
508	{
509	/* This hack is meant to convert a regular new chat into a groupchat */
510	if( strcmp( m->text, GROUPCHAT_SWITCHBOARD_MESSAGE ) == 0 )
511	msn_sb_to_chat( sb );
512	else
513	st = msn_sb_sendmessage( sb, m->text );
514	}
515	g_free( m->text );
516	g_free( m->who );
517	g_free( m );
518
519	sb->msgq = g_slist_remove( sb->msgq, m );
520	}
521
522	return( st );
523	}
524	else if( sb->who )
525	{
526	debug( "Converting chat with %s to a groupchat because %s joined the session.", sb->who, cmd[1] );
527
528	/* This SB is a one-to-one chat right now, but someone else is joining. */
529	msn_sb_to_chat( sb );
530
531	imcb_chat_add_buddy( sb->chat, cmd[1] );
532	}
533	else if( sb->chat )
534	{
535	imcb_chat_add_buddy( sb->chat, cmd[1] );
536	sb->ready = 1;
537	}
538	else
539	{
540	/* PANIC! */
541	}
542	}
543	else if( strcmp( cmd[0], "MSG" ) == 0 )
544	{
545	if( num_parts != 4 )
546	{
547	msn_sb_destroy( sb );
548	return( 0 );
549	}
550
551	sb->handler->msglen = atoi( cmd[3] );
552
553	if( sb->handler->msglen <= 0 )
554	{
555	debug( "Received a corrupted message on the switchboard, the switchboard will be closed" );
556	msn_sb_destroy( sb );
557	return( 0 );
558	}
559	}
560	else if( strcmp( cmd[0], "NAK" ) == 0 )
561	{
562	if( sb->who )
563	{
564	imcb_log( ic, "The MSN servers could not deliver one of your messages to %s.", sb->who );
565	}
566	else
567	{
568	imcb_log( ic, "The MSN servers could not deliver one of your groupchat messages to all participants." );
569	}
570	}
571	else if( strcmp( cmd[0], "BYE" ) == 0 )
572	{
573	if( num_parts < 2 )
574	{
575	msn_sb_destroy( sb );
576	return( 0 );
577	}
578
579	/* if( cmd[2] && cmd[2] == '1' ) -=> Chat is being cleaned up because of idleness /
580
581	if( sb->who )
582	{
583	/* This is a single-person chat, and the other person is leaving. */
584	g_free( sb->who );
585	sb->who = NULL;
586	sb->ready = 0;
587
588	debug( "Person %s left the one-to-one switchboard connection. Keeping it around as a spare...", cmd[1] );
589
590	/* We could clean up the switchboard now, but keeping it around
591	as a spare for a next conversation sounds more sane to me.
592	The server will clean it up when it's idle for too long. */
593	}
594	else if( sb->chat )
595	{
596	imcb_chat_remove_buddy( sb->chat, cmd[1], "" );
597	}
598	else
599	{
600	/* PANIC! */
601	}
602	}
603	else if( isdigit( cmd[0][0] ) )
604	{
605	int num = atoi( cmd[0] );
606	const struct msn_status_code *err = msn_status_by_number( num );
607
608	imcb_error( ic, "Error reported by switchboard server: %s", err->text );
609
610	if( err->flags & STATUS_SB_FATAL )
611	{
612	msn_sb_destroy( sb );
613	return 0;
614	}
615	else if( err->flags & STATUS_FATAL )
616	{
617	imc_logout( ic, TRUE );
618	return 0;
619	}
620	else if( err->flags & STATUS_SB_IM_SPARE )
621	{
622	if( sb->who )
623	{
624	/* Apparently some invitation failed. We might want to use this
625	board later, so keep it as a spare. */
626	g_free( sb->who );
627	sb->who = NULL;
628
629	/* Also clear the msgq, otherwise someone else might get them. */
630	msn_msgq_purge( ic, &sb->msgq );
631	}
632
633	/* Do NOT return 0 here, we want to keep this sb. */
634	}
635	}
636	else
637	{
638	/* debug( "Received unknown command from switchboard server: %s", cmd[0] ); */
639	}
640
641	return( 1 );
642	}
643
644	static int msn_sb_message( gpointer data, char msg, int msglen, char *cmd, int num_parts )
645	{
646	struct msn_switchboard *sb = data;
647	struct im_connection *ic = sb->ic;
648	char *body;
649	int blen = 0;
650
651	if( !num_parts )
652	return( 1 );
653
654	if( ( body = strstr( msg, "\r\n\r\n" ) ) )
655	{
656	body += 4;
657	blen = msglen - ( body - msg );
658	}
659
660	if( strcmp( cmd[0], "MSG" ) == 0 )
661	{
662	char *ct = msn_findheader( msg, "Content-Type:", msglen );
663
664	if( !ct )
665	return( 1 );
666
667	if( g_strncasecmp( ct, "text/plain", 10 ) == 0 )
668	{
669	g_free( ct );
670
671	if( !body )
672	return( 1 );
673
674	if( sb->who )
675	{
676	imcb_buddy_msg( ic, cmd[1], body, 0, 0 );
677	}
678	else if( sb->chat )
679	{
680	imcb_chat_msg( sb->chat, cmd[1], body, 0, 0 );
681	}
682	else
683	{
684	/* PANIC! */
685	}
686	}
687	else if( g_strncasecmp( ct, "text/x-msmsgsinvite", 19 ) == 0 )
688	{
689	char *itype = msn_findheader( body, "Application-GUID:", blen );
690	char buf[1024];
691
692	g_free( ct );
693
694	*buf = 0;
695
696	if( !itype )
697	return( 1 );
698
699	/* File transfer. */
700	if( strcmp( itype, "{5D3E02AB-6190-11d3-BBBB-00C04F795683}" ) == 0 )
701	{
702	char *name = msn_findheader( body, "Application-File:", blen );
703	char *size = msn_findheader( body, "Application-FileSize:", blen );
704
705	if( name && size )
706	{
707	g_snprintf( buf, sizeof( buf ), "<< \x02""BitlBee\x02"" - Filetransfer: `%s', %s bytes >>\n"
708	"Filetransfers are not supported by BitlBee for now...", name, size );
709	}
710	else
711	{
712	strcpy( buf, "<< \x02""BitlBee\x02"" - Corrupted MSN filetransfer invitation message >>" );
713	}
714
715	if( name ) g_free( name );
716	if( size ) g_free( size );
717	}
718	else
719	{
720	char *iname = msn_findheader( body, "Application-Name:", blen );
721
722	g_snprintf( buf, sizeof( buf ), "<< \x02""BitlBee\x02"" - Unknown MSN invitation - %s (%s) >>",
723	itype, iname ? iname : "no name" );
724
725	if( iname ) g_free( iname );
726	}
727
728	g_free( itype );
729
730	if( !*buf )
731	return( 1 );
732
733	if( sb->who )
734	{
735	imcb_buddy_msg( ic, cmd[1], buf, 0, 0 );
736	}
737	else if( sb->chat )
738	{
739	imcb_chat_msg( sb->chat, cmd[1], buf, 0, 0 );
740	}
741	else
742	{
743	/* PANIC! */
744	}
745	}
746	else if( g_strncasecmp( ct, "text/x-msmsgscontrol", 20 ) == 0 )
747	{
748	char *who = msn_findheader( msg, "TypingUser:", msglen );
749
750	if( who )
751	{
752	imcb_buddy_typing( ic, who, OPT_TYPING );
753	g_free( who );
754	}
755
756	g_free( ct );
757	}
758	else
759	{
760	g_free( ct );
761	}
762	}
763
764	return( 1 );
765	}

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