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sb.c @ 83e92bf

Last change on this file since 83e92bf was 1c3008a, checked in by Wilmer van der Gaast <wilmer@…>, at 2009-12-13T14:48:56Z

No functional changes, just some style "fixes". Although I admit I'm
somewhat growing out of my own coding style, I do try to keep things
consistent at least within files.

Comments are now in reviewboard:

http://code.bitlbee.org/rb/r/13/

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	#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
183	{
184	buf = g_new0( char, sizeof( MSN_MESSAGE_HEADERS ) + strlen( text ) * 2 + 1 );
185	i = strlen( MSN_MESSAGE_HEADERS );
186
187	strcpy( buf, MSN_MESSAGE_HEADERS );
188	for( j = 0; text[j]; j ++ )
189	{
190	if( text[j] == '\n' )
191	buf[i++] = '\r';
192
193	buf[i++] = text[j];
194	}
195	}
196
197	/* Build the final packet (MSG command + the message). */
198	packet = g_strdup_printf( "MSG %d N %d\r\n%s", ++sb->trId, i, buf );
199	g_free( buf );
200	if( msn_sb_write( sb, packet, strlen( packet ) ) )
201	{
202	g_free( packet );
203	return( 1 );
204	}
205	else
206	{
207	g_free( packet );
208	return( 0 );
209	}
210	}
211	else if( sb->who )
212	{
213	struct msn_message *m = g_new0( struct msn_message, 1 );
214
215	m->who = g_strdup( "" );
216	m->text = g_strdup( text );
217	sb->msgq = g_slist_append( sb->msgq, m );
218
219	return( 1 );
220	}
221	else
222	{
223	return( 0 );
224	}
225	}
226
227	struct groupchat msn_sb_to_chat( struct msn_switchboard sb )
228	{
229	struct im_connection *ic = sb->ic;
230	char buf[1024];
231
232	/* Create the groupchat structure. */
233	g_snprintf( buf, sizeof( buf ), "MSN groupchat session %d", sb->session );
234	sb->chat = imcb_chat_new( ic, buf );
235
236	/* Populate the channel. */
237	if( sb->who ) imcb_chat_add_buddy( sb->chat, sb->who );
238	imcb_chat_add_buddy( sb->chat, ic->acc->user );
239
240	/* And make sure the switchboard doesn't look like a regular chat anymore. */
241	if( sb->who )
242	{
243	g_free( sb->who );
244	sb->who = NULL;
245	}
246
247	return sb->chat;
248	}
249
250	void msn_sb_destroy( struct msn_switchboard *sb )
251	{
252	struct im_connection *ic = sb->ic;
253	struct msn_data *md = ic->proto_data;
254
255	debug( "Destroying switchboard: %s", sb->who ? sb->who : sb->key ? sb->key : "" );
256
257	msn_msgq_purge( ic, &sb->msgq );
258
259	if( sb->key ) g_free( sb->key );
260	if( sb->who ) g_free( sb->who );
261
262	if( sb->chat )
263	{
264	imcb_chat_free( sb->chat );
265	}
266
267	if( sb->handler )
268	{
269	if( sb->handler->rxq ) g_free( sb->handler->rxq );
270	if( sb->handler->cmd_text ) g_free( sb->handler->cmd_text );
271	g_free( sb->handler );
272	}
273
274	if( sb->inp ) b_event_remove( sb->inp );
275	closesocket( sb->fd );
276
277	msn_switchboards = g_slist_remove( msn_switchboards, sb );
278	md->switchboards = g_slist_remove( md->switchboards, sb );
279	g_free( sb );
280	}
281
282	gboolean msn_sb_connected( gpointer data, gint source, b_input_condition cond )
283	{
284	struct msn_switchboard *sb = data;
285	struct im_connection *ic;
286	struct msn_data *md;
287	char buf[1024];
288
289	/* Are we still alive? */
290	if( !g_slist_find( msn_switchboards, sb ) )
291	return FALSE;
292
293	ic = sb->ic;
294	md = ic->proto_data;
295
296	if( source != sb->fd )
297	{
298	debug( "Error %d while connecting to switchboard server", 1 );
299	msn_sb_destroy( sb );
300	return FALSE;
301	}
302
303	/* Prepare the callback */
304	sb->handler = g_new0( struct msn_handler_data, 1 );
305	sb->handler->fd = sb->fd;
306	sb->handler->rxq = g_new0( char, 1 );
307	sb->handler->data = sb;
308	sb->handler->exec_command = msn_sb_command;
309	sb->handler->exec_message = msn_sb_message;
310
311	if( sb->session == MSN_SB_NEW )
312	g_snprintf( buf, sizeof( buf ), "USR %d %s %s\r\n", ++sb->trId, ic->acc->user, sb->key );
313	else
314	g_snprintf( buf, sizeof( buf ), "ANS %d %s %s %d\r\n", ++sb->trId, ic->acc->user, sb->key, sb->session );
315
316	if( msn_sb_write( sb, buf, strlen( buf ) ) )
317	sb->inp = b_input_add( sb->fd, GAIM_INPUT_READ, msn_sb_callback, sb );
318	else
319	debug( "Error %d while connecting to switchboard server", 2 );
320
321	return FALSE;
322	}
323
324	static gboolean msn_sb_callback( gpointer data, gint source, b_input_condition cond )
325	{
326	struct msn_switchboard *sb = data;
327	struct im_connection *ic = sb->ic;
328	struct msn_data *md = ic->proto_data;
329
330	if( msn_handler( sb->handler ) == -1 )
331	{
332	time_t now = time( NULL );
333
334	if( now - md->first_sb_failure > 600 )
335	{
336	/* It's not really the first one, but the start of this "series".
337	With this, the warning below will be shown only if this happens
338	at least three times in ten minutes. This algorithm isn't
339	perfect, but for this purpose it will do. */
340	md->first_sb_failure = now;
341	md->sb_failures = 0;
342	}
343
344	debug( "Error: Switchboard died" );
345	if( ++ md->sb_failures >= 3 )
346	imcb_log( ic, "Warning: Many switchboard failures on MSN connection. "
347	"There might be problems delivering your messages." );
348
349	if( sb->msgq != NULL )
350	{
351	char buf[1024];
352
353	if( md->msgq == NULL )
354	{
355	md->msgq = sb->msgq;
356	}
357	else
358	{
359	GSList *l;
360
361	for( l = md->msgq; l->next; l = l->next );
362	l->next = sb->msgq;
363	}
364	sb->msgq = NULL;
365
366	debug( "Moved queued messages back to the main queue, creating a new switchboard to retry." );
367	g_snprintf( buf, sizeof( buf ), "XFR %d SB\r\n", ++md->trId );
368	if( !msn_write( ic, buf, strlen( buf ) ) )
369	return FALSE;
370	}
371
372	msn_sb_destroy( sb );
373
374	return FALSE;
375	}
376	else
377	{
378	return TRUE;
379	}
380	}
381
382	static int msn_sb_command( gpointer data, char **cmd, int num_parts )
383	{
384	struct msn_switchboard *sb = data;
385	struct im_connection *ic = sb->ic;
386	char buf[1024];
387
388	if( !num_parts )
389	{
390	/* Hrrm... Empty command...? Ignore? */
391	return( 1 );
392	}
393
394	if( strcmp( cmd[0], "XFR" ) == 0 )
395	{
396	imcb_error( ic, "Received an XFR from a switchboard server, unable to comply! This is likely to be a bug, please report it!" );
397	imc_logout( ic, TRUE );
398	return( 0 );
399	}
400	else if( strcmp( cmd[0], "USR" ) == 0 )
401	{
402	if( num_parts != 5 )
403	{
404	msn_sb_destroy( sb );
405	return( 0 );
406	}
407
408	if( strcmp( cmd[2], "OK" ) != 0 )
409	{
410	msn_sb_destroy( sb );
411	return( 0 );
412	}
413
414	if( sb->who )
415	{
416	g_snprintf( buf, sizeof( buf ), "CAL %d %s\r\n", ++sb->trId, sb->who );
417	return( msn_sb_write( sb, buf, strlen( buf ) ) );
418	}
419	else
420	{
421	debug( "Just created a switchboard, but I don't know what to do with it." );
422	}
423	}
424	else if( strcmp( cmd[0], "IRO" ) == 0 )
425	{
426	int num, tot;
427
428	if( num_parts != 6 )
429	{
430	msn_sb_destroy( sb );
431	return( 0 );
432	}
433
434	num = atoi( cmd[2] );
435	tot = atoi( cmd[3] );
436
437	if( tot <= 0 )
438	{
439	msn_sb_destroy( sb );
440	return( 0 );
441	}
442	else if( tot > 1 )
443	{
444	char buf[1024];
445
446	if( num == 1 )
447	{
448	g_snprintf( buf, sizeof( buf ), "MSN groupchat session %d", sb->session );
449	sb->chat = imcb_chat_new( ic, buf );
450
451	g_free( sb->who );
452	sb->who = NULL;
453	}
454
455	imcb_chat_add_buddy( sb->chat, cmd[4] );
456
457	if( num == tot )
458	{
459	imcb_chat_add_buddy( sb->chat, ic->acc->user );
460	}
461	}
462	}
463	else if( strcmp( cmd[0], "ANS" ) == 0 )
464	{
465	if( num_parts != 3 )
466	{
467	msn_sb_destroy( sb );
468	return( 0 );
469	}
470
471	if( strcmp( cmd[2], "OK" ) != 0 )
472	{
473	debug( "Switchboard server sent a negative ANS reply" );
474	msn_sb_destroy( sb );
475	return( 0 );
476	}
477
478	sb->ready = 1;
479	}
480	else if( strcmp( cmd[0], "CAL" ) == 0 )
481	{
482	if( num_parts != 4 \|\| !isdigit( cmd[3][0] ) )
483	{
484	msn_sb_destroy( sb );
485	return( 0 );
486	}
487
488	sb->session = atoi( cmd[3] );
489	}
490	else if( strcmp( cmd[0], "JOI" ) == 0 )
491	{
492	if( num_parts != 3 )
493	{
494	msn_sb_destroy( sb );
495	return( 0 );
496	}
497
498	if( sb->who && g_strcasecmp( cmd[1], sb->who ) == 0 )
499	{
500	/* The user we wanted to talk to is finally there, let's send the queued messages then. */
501	struct msn_message *m;
502	GSList *l;
503	int st = 1;
504
505	debug( "%s arrived in the switchboard session, now sending queued message(s)", cmd[1] );
506
507	/* Without this, sendmessage() will put everything back on the queue... */
508	sb->ready = 1;
509
510	while( ( l = sb->msgq ) )
511	{
512	m = l->data;
513	if( st )
514	{
515	/* This hack is meant to convert a regular new chat into a groupchat */
516	if( strcmp( m->text, GROUPCHAT_SWITCHBOARD_MESSAGE ) == 0 )
517	msn_sb_to_chat( sb );
518	else
519	st = msn_sb_sendmessage( sb, m->text );
520	}
521	g_free( m->text );
522	g_free( m->who );
523	g_free( m );
524
525	sb->msgq = g_slist_remove( sb->msgq, m );
526	}
527
528	return( st );
529	}
530	else if( sb->who )
531	{
532	debug( "Converting chat with %s to a groupchat because %s joined the session.", sb->who, cmd[1] );
533
534	/* This SB is a one-to-one chat right now, but someone else is joining. */
535	msn_sb_to_chat( sb );
536
537	imcb_chat_add_buddy( sb->chat, cmd[1] );
538	}
539	else if( sb->chat )
540	{
541	imcb_chat_add_buddy( sb->chat, cmd[1] );
542	sb->ready = 1;
543	}
544	else
545	{
546	/* PANIC! */
547	}
548	}
549	else if( strcmp( cmd[0], "MSG" ) == 0 )
550	{
551	if( num_parts != 4 )
552	{
553	msn_sb_destroy( sb );
554	return( 0 );
555	}
556
557	sb->handler->msglen = atoi( cmd[3] );
558
559	if( sb->handler->msglen <= 0 )
560	{
561	debug( "Received a corrupted message on the switchboard, the switchboard will be closed" );
562	msn_sb_destroy( sb );
563	return( 0 );
564	}
565	}
566	else if( strcmp( cmd[0], "NAK" ) == 0 )
567	{
568	if( sb->who )
569	{
570	imcb_log( ic, "The MSN servers could not deliver one of your messages to %s.", sb->who );
571	}
572	else
573	{
574	imcb_log( ic, "The MSN servers could not deliver one of your groupchat messages to all participants." );
575	}
576	}
577	else if( strcmp( cmd[0], "BYE" ) == 0 )
578	{
579	if( num_parts < 2 )
580	{
581	msn_sb_destroy( sb );
582	return( 0 );
583	}
584
585	/* if( cmd[2] && cmd[2] == '1' ) -=> Chat is being cleaned up because of idleness /
586
587	if( sb->who )
588	{
589	/* This is a single-person chat, and the other person is leaving. */
590	g_free( sb->who );
591	sb->who = NULL;
592	sb->ready = 0;
593
594	debug( "Person %s left the one-to-one switchboard connection. Keeping it around as a spare...", cmd[1] );
595
596	/* We could clean up the switchboard now, but keeping it around
597	as a spare for a next conversation sounds more sane to me.
598	The server will clean it up when it's idle for too long. */
599	}
600	else if( sb->chat )
601	{
602	imcb_chat_remove_buddy( sb->chat, cmd[1], "" );
603	}
604	else
605	{
606	/* PANIC! */
607	}
608	}
609	else if( isdigit( cmd[0][0] ) )
610	{
611	int num = atoi( cmd[0] );
612	const struct msn_status_code *err = msn_status_by_number( num );
613
614	imcb_error( ic, "Error reported by switchboard server: %s", err->text );
615
616	if( err->flags & STATUS_SB_FATAL )
617	{
618	msn_sb_destroy( sb );
619	return 0;
620	}
621	else if( err->flags & STATUS_FATAL )
622	{
623	imc_logout( ic, TRUE );
624	return 0;
625	}
626	else if( err->flags & STATUS_SB_IM_SPARE )
627	{
628	if( sb->who )
629	{
630	/* Apparently some invitation failed. We might want to use this
631	board later, so keep it as a spare. */
632	g_free( sb->who );
633	sb->who = NULL;
634
635	/* Also clear the msgq, otherwise someone else might get them. */
636	msn_msgq_purge( ic, &sb->msgq );
637	}
638
639	/* Do NOT return 0 here, we want to keep this sb. */
640	}
641	}
642	else
643	{
644	/* debug( "Received unknown command from switchboard server: %s", cmd[0] ); */
645	}
646
647	return( 1 );
648	}
649
650	static int msn_sb_message( gpointer data, char msg, int msglen, char *cmd, int num_parts )
651	{
652	struct msn_switchboard *sb = data;
653	struct im_connection *ic = sb->ic;
654	char *body;
655	int blen = 0;
656
657	if( !num_parts )
658	return( 1 );
659
660	if( ( body = strstr( msg, "\r\n\r\n" ) ) )
661	{
662	body += 4;
663	blen = msglen - ( body - msg );
664	}
665
666	if( strcmp( cmd[0], "MSG" ) == 0 )
667	{
668	char *ct = msn_findheader( msg, "Content-Type:", msglen );
669
670	if( !ct )
671	return( 1 );
672
673	if( g_strncasecmp( ct, "text/plain", 10 ) == 0 )
674	{
675	g_free( ct );
676
677	if( !body )
678	return( 1 );
679
680	if( sb->who )
681	{
682	imcb_buddy_msg( ic, cmd[1], body, 0, 0 );
683	}
684	else if( sb->chat )
685	{
686	imcb_chat_msg( sb->chat, cmd[1], body, 0, 0 );
687	}
688	else
689	{
690	/* PANIC! */
691	}
692	}
693	else if( g_strncasecmp( ct, "text/x-msmsgsinvite", 19 ) == 0 )
694	{
695	char *command = msn_findheader( body, "Invitation-Command:", blen );
696	char *cookie = msn_findheader( body, "Invitation-Cookie:", blen );
697	unsigned int icookie;
698
699	g_free( ct );
700
701	/* Every invite should have both a Command and Cookie header */
702	if( !command \|\| !cookie ) {
703	g_free( command );
704	g_free( cookie );
705	imcb_log( ic, "Warning: No command or cookie from %s", sb->who );
706	return 1;
707	}
708
709	icookie = strtoul( cookie, NULL, 10 );
710	g_free( cookie );
711
712	if( g_strncasecmp( command, "INVITE", 6 ) == 0 ) {
713	msn_invitation_invite( sb, cmd[1], icookie, body, blen );
714	} else if( g_strncasecmp( command, "ACCEPT", 6 ) == 0 ) {
715	msn_invitation_accept( sb, cmd[1], icookie, body, blen );
716	} else if( g_strncasecmp( command, "CANCEL", 6 ) == 0 ) {
717	msn_invitation_cancel( sb, cmd[1], icookie, body, blen );
718	} else {
719	imcb_log( ic, "Warning: Received invalid invitation with "
720	"command %s from %s", command, sb->who );
721	}
722
723	g_free( command );
724	}
725	else if( g_strncasecmp( ct, "application/x-msnmsgrp2p", 24 ) == 0 )
726	{
727	imcb_error( sb->ic, "Cannot receive file from %s: BitlBee does not "
728	"support msnmsgrp2p yet.", sb->who );
729	g_free( ct );
730	}
731	else if( g_strncasecmp( ct, "text/x-msmsgscontrol", 20 ) == 0 )
732	{
733	char *who = msn_findheader( msg, "TypingUser:", msglen );
734
735	if( who )
736	{
737	imcb_buddy_typing( ic, who, OPT_TYPING );
738	g_free( who );
739	}
740
741	g_free( ct );
742	}
743	else
744	{
745	g_free( ct );
746	}
747	}
748
749	return( 1 );
750	}

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source: protocols/msn/sb.c @ 83e92bf

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