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

Last change on this file since 83e92bf was 21d48d9, checked in by Wilmer van der Gaast <wilmer@…>, at 2010-03-14T20:19:10Z
Fix for bug #536: No longer fail on corrupted USR responses with certain Unicode characters in the friendly name.
Property mode set to `100644`
File size: 17.8 KB

Line
1	/********************************************************************\
2	* BitlBee -- An IRC to other IM-networks gateway *
3	* *
4	* Copyright 2002-2004 Wilmer van der Gaast and others *
5	\********************************************************************/
6
7	/* MSN module - Notification server callbacks */
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_ns_callback( gpointer data, gint source, b_input_condition cond );
33	static int msn_ns_command( gpointer data, char **cmd, int num_parts );
34	static int msn_ns_message( gpointer data, char msg, int msglen, char *cmd, int num_parts );
35
36	static void msn_auth_got_passport_token( struct msn_auth_data *mad );
37
38	gboolean msn_ns_connected( gpointer data, gint source, b_input_condition cond )
39	{
40	struct im_connection *ic = data;
41	struct msn_data *md;
42	char s[1024];
43
44	if( !g_slist_find( msn_connections, ic ) )
45	return FALSE;
46
47	if( source == -1 )
48	{
49	imcb_error( ic, "Could not connect to server" );
50	imc_logout( ic, TRUE );
51	return FALSE;
52	}
53
54	md = ic->proto_data;
55
56	if( !md->handler )
57	{
58	md->handler = g_new0( struct msn_handler_data, 1 );
59	md->handler->data = ic;
60	md->handler->exec_command = msn_ns_command;
61	md->handler->exec_message = msn_ns_message;
62	}
63	else
64	{
65	if( md->handler->rxq )
66	g_free( md->handler->rxq );
67
68	md->handler->rxlen = 0;
69	}
70
71	md->handler->fd = md->fd;
72	md->handler->rxq = g_new0( char, 1 );
73
74	g_snprintf( s, sizeof( s ), "VER %d MSNP8 CVR0\r\n", ++md->trId );
75	if( msn_write( ic, s, strlen( s ) ) )
76	{
77	ic->inpa = b_input_add( md->fd, GAIM_INPUT_READ, msn_ns_callback, ic );
78	imcb_log( ic, "Connected to server, waiting for reply" );
79	}
80
81	return FALSE;
82	}
83
84	static gboolean msn_ns_callback( gpointer data, gint source, b_input_condition cond )
85	{
86	struct im_connection *ic = data;
87	struct msn_data *md = ic->proto_data;
88
89	if( msn_handler( md->handler ) == -1 ) /* Don't do this on ret == 0, it's already done then. */
90	{
91	imcb_error( ic, "Error while reading from server" );
92	imc_logout( ic, TRUE );
93
94	return FALSE;
95	}
96	else
97	return TRUE;
98	}
99
100	static int msn_ns_command( gpointer data, char **cmd, int num_parts )
101	{
102	struct im_connection *ic = data;
103	struct msn_data *md = ic->proto_data;
104	char buf[1024];
105
106	if( num_parts == 0 )
107	{
108	/* Hrrm... Empty command...? Ignore? */
109	return( 1 );
110	}
111
112	if( strcmp( cmd[0], "VER" ) == 0 )
113	{
114	if( cmd[2] && strncmp( cmd[2], "MSNP8", 5 ) != 0 )
115	{
116	imcb_error( ic, "Unsupported protocol" );
117	imc_logout( ic, FALSE );
118	return( 0 );
119	}
120
121	g_snprintf( buf, sizeof( buf ), "CVR %d 0x0409 mac 10.2.0 ppc macmsgs 3.5.1 macmsgs %s\r\n",
122	++md->trId, ic->acc->user );
123	return( msn_write( ic, buf, strlen( buf ) ) );
124	}
125	else if( strcmp( cmd[0], "CVR" ) == 0 )
126	{
127	/* We don't give a damn about the information we just received */
128	g_snprintf( buf, sizeof( buf ), "USR %d TWN I %s\r\n", ++md->trId, ic->acc->user );
129	return( msn_write( ic, buf, strlen( buf ) ) );
130	}
131	else if( strcmp( cmd[0], "XFR" ) == 0 )
132	{
133	char *server;
134	int port;
135
136	if( num_parts == 6 && strcmp( cmd[2], "NS" ) == 0 )
137	{
138	b_event_remove( ic->inpa );
139	ic->inpa = 0;
140	closesocket( md->fd );
141
142	server = strchr( cmd[3], ':' );
143	if( !server )
144	{
145	imcb_error( ic, "Syntax error" );
146	imc_logout( ic, TRUE );
147	return( 0 );
148	}
149	*server = 0;
150	port = atoi( server + 1 );
151	server = cmd[3];
152
153	imcb_log( ic, "Transferring to other server" );
154
155	md->fd = proxy_connect( server, port, msn_ns_connected, ic );
156	}
157	else if( num_parts == 6 && strcmp( cmd[2], "SB" ) == 0 )
158	{
159	struct msn_switchboard *sb;
160
161	server = strchr( cmd[3], ':' );
162	if( !server )
163	{
164	imcb_error( ic, "Syntax error" );
165	imc_logout( ic, TRUE );
166	return( 0 );
167	}
168	*server = 0;
169	port = atoi( server + 1 );
170	server = cmd[3];
171
172	if( strcmp( cmd[4], "CKI" ) != 0 )
173	{
174	imcb_error( ic, "Unknown authentication method for switchboard" );
175	imc_logout( ic, TRUE );
176	return( 0 );
177	}
178
179	debug( "Connecting to a new switchboard with key %s", cmd[5] );
180
181	if( ( sb = msn_sb_create( ic, server, port, cmd[5], MSN_SB_NEW ) ) == NULL )
182	{
183	/* Although this isn't strictly fatal for the NS connection, it's
184	definitely something serious (we ran out of file descriptors?). */
185	imcb_error( ic, "Could not create new switchboard" );
186	imc_logout( ic, TRUE );
187	return( 0 );
188	}
189
190	if( md->msgq )
191	{
192	struct msn_message *m = md->msgq->data;
193	GSList *l;
194
195	sb->who = g_strdup( m->who );
196
197	/* Move all the messages to the first user in the message
198	queue to the switchboard message queue. */
199	l = md->msgq;
200	while( l )
201	{
202	m = l->data;
203	l = l->next;
204	if( strcmp( m->who, sb->who ) == 0 )
205	{
206	sb->msgq = g_slist_append( sb->msgq, m );
207	md->msgq = g_slist_remove( md->msgq, m );
208	}
209	}
210	}
211	}
212	else
213	{
214	imcb_error( ic, "Syntax error" );
215	imc_logout( ic, TRUE );
216	return( 0 );
217	}
218	}
219	else if( strcmp( cmd[0], "USR" ) == 0 )
220	{
221	if( num_parts == 5 && strcmp( cmd[2], "TWN" ) == 0 && strcmp( cmd[3], "S" ) == 0 )
222	{
223	/* Time for some Passport black magic... */
224	if( !passport_get_token( msn_auth_got_passport_token, ic, ic->acc->user, ic->acc->pass, cmd[4] ) )
225	{
226	imcb_error( ic, "Error while contacting Passport server" );
227	imc_logout( ic, TRUE );
228	return( 0 );
229	}
230	}
231	else if( num_parts >= 7 && strcmp( cmd[2], "OK" ) == 0 )
232	{
233	set_t *s;
234
235	if( num_parts == 7 )
236	{
237	http_decode( cmd[4] );
238
239	strncpy( ic->displayname, cmd[4], sizeof( ic->displayname ) );
240	ic->displayname[sizeof(ic->displayname)-1] = 0;
241
242	if( ( s = set_find( &ic->acc->set, "display_name" ) ) )
243	{
244	g_free( s->value );
245	s->value = g_strdup( cmd[4] );
246	}
247	}
248	else
249	{
250	imcb_log( ic, "Warning: Friendly name in server response was corrupted" );
251	}
252
253	imcb_log( ic, "Authenticated, getting buddy list" );
254
255	g_snprintf( buf, sizeof( buf ), "SYN %d 0\r\n", ++md->trId );
256	return( msn_write( ic, buf, strlen( buf ) ) );
257	}
258	else
259	{
260	imcb_error( ic, "Unknown authentication type" );
261	imc_logout( ic, FALSE );
262	return( 0 );
263	}
264	}
265	else if( strcmp( cmd[0], "MSG" ) == 0 )
266	{
267	if( num_parts != 4 )
268	{
269	imcb_error( ic, "Syntax error" );
270	imc_logout( ic, TRUE );
271	return( 0 );
272	}
273
274	md->handler->msglen = atoi( cmd[3] );
275
276	if( md->handler->msglen <= 0 )
277	{
278	imcb_error( ic, "Syntax error" );
279	imc_logout( ic, TRUE );
280	return( 0 );
281	}
282	}
283	else if( strcmp( cmd[0], "SYN" ) == 0 )
284	{
285	if( num_parts == 5 )
286	{
287	int i, groupcount;
288
289	groupcount = atoi( cmd[4] );
290	if( groupcount > 0 )
291	{
292	/* valgrind says this is leaking memory, I'm guessing
293	that this happens during server redirects. */
294	if( md->grouplist )
295	{
296	for( i = 0; i < md->groupcount; i ++ )
297	g_free( md->grouplist[i] );
298	g_free( md->grouplist );
299	}
300
301	md->groupcount = groupcount;
302	md->grouplist = g_new0( char *, md->groupcount );
303	}
304
305	md->buddycount = atoi( cmd[3] );
306	if( !*cmd[3] \|\| md->buddycount == 0 )
307	msn_logged_in( ic );
308	}
309	else
310	{
311	/* Hrrm... This SYN reply doesn't really look like something we expected.
312	Let's assume everything is okay. */
313
314	msn_logged_in( ic );
315	}
316	}
317	else if( strcmp( cmd[0], "LST" ) == 0 )
318	{
319	int list;
320
321	if( num_parts != 4 && num_parts != 5 )
322	{
323	imcb_error( ic, "Syntax error" );
324	imc_logout( ic, TRUE );
325	return( 0 );
326	}
327
328	http_decode( cmd[2] );
329	list = atoi( cmd[3] );
330
331	if( list & 1 ) /* FL */
332	{
333	char *group = NULL;
334	int num;
335
336	if( cmd[4] != NULL && sscanf( cmd[4], "%d", &num ) == 1 && num < md->groupcount )
337	group = md->grouplist[num];
338
339	imcb_add_buddy( ic, cmd[1], group );
340	imcb_rename_buddy( ic, cmd[1], cmd[2] );
341	}
342	if( list & 2 ) /* AL */
343	{
344	ic->permit = g_slist_append( ic->permit, g_strdup( cmd[1] ) );
345	}
346	if( list & 4 ) /* BL */
347	{
348	ic->deny = g_slist_append( ic->deny, g_strdup( cmd[1] ) );
349	}
350	if( list & 8 ) /* RL */
351	{
352	if( ( list & 6 ) == 0 )
353	msn_buddy_ask( ic, cmd[1], cmd[2] );
354	}
355
356	if( --md->buddycount == 0 )
357	{
358	if( ic->flags & OPT_LOGGED_IN )
359	{
360	imcb_log( ic, "Successfully transferred to different server" );
361	g_snprintf( buf, sizeof( buf ), "CHG %d %s %d\r\n", ++md->trId, md->away_state->code, 0 );
362	return( msn_write( ic, buf, strlen( buf ) ) );
363	}
364	else
365	{
366	msn_logged_in( ic );
367	}
368	}
369	}
370	else if( strcmp( cmd[0], "LSG" ) == 0 )
371	{
372	int num;
373
374	if( num_parts != 4 )
375	{
376	imcb_error( ic, "Syntax error" );
377	imc_logout( ic, TRUE );
378	return( 0 );
379	}
380
381	http_decode( cmd[2] );
382	num = atoi( cmd[1] );
383
384	if( num < md->groupcount )
385	md->grouplist[num] = g_strdup( cmd[2] );
386	}
387	else if( strcmp( cmd[0], "CHL" ) == 0 )
388	{
389	md5_state_t state;
390	md5_byte_t digest[16];
391	int i;
392
393	if( num_parts != 3 )
394	{
395	imcb_error( ic, "Syntax error" );
396	imc_logout( ic, TRUE );
397	return( 0 );
398	}
399
400	md5_init( &state );
401	md5_append( &state, (const md5_byte_t *) cmd[2], strlen( cmd[2] ) );
402	md5_append( &state, (const md5_byte_t *) QRY_CODE, strlen( QRY_CODE ) );
403	md5_finish( &state, digest );
404
405	g_snprintf( buf, sizeof( buf ), "QRY %d %s %d\r\n", ++md->trId, QRY_NAME, 32 );
406	for( i = 0; i < 16; i ++ )
407	g_snprintf( buf + strlen( buf ), 3, "%02x", digest[i] );
408
409	return( msn_write( ic, buf, strlen( buf ) ) );
410	}
411	else if( strcmp( cmd[0], "ILN" ) == 0 )
412	{
413	const struct msn_away_state *st;
414
415	if( num_parts != 6 )
416	{
417	imcb_error( ic, "Syntax error" );
418	imc_logout( ic, TRUE );
419	return( 0 );
420	}
421
422	http_decode( cmd[4] );
423	imcb_rename_buddy( ic, cmd[3], cmd[4] );
424
425	st = msn_away_state_by_code( cmd[2] );
426	if( !st )
427	{
428	/* FIXME: Warn/Bomb about unknown away state? */
429	st = msn_away_state_list + 1;
430	}
431
432	imcb_buddy_status( ic, cmd[3], OPT_LOGGED_IN \|
433	( st != msn_away_state_list ? OPT_AWAY : 0 ),
434	st->name, NULL );
435	}
436	else if( strcmp( cmd[0], "FLN" ) == 0 )
437	{
438	if( cmd[1] )
439	imcb_buddy_status( ic, cmd[1], 0, NULL, NULL );
440	}
441	else if( strcmp( cmd[0], "NLN" ) == 0 )
442	{
443	const struct msn_away_state *st;
444
445	if( num_parts != 5 )
446	{
447	imcb_error( ic, "Syntax error" );
448	imc_logout( ic, TRUE );
449	return( 0 );
450	}
451
452	http_decode( cmd[3] );
453	imcb_rename_buddy( ic, cmd[2], cmd[3] );
454
455	st = msn_away_state_by_code( cmd[1] );
456	if( !st )
457	{
458	/* FIXME: Warn/Bomb about unknown away state? */
459	st = msn_away_state_list + 1;
460	}
461
462	imcb_buddy_status( ic, cmd[2], OPT_LOGGED_IN \|
463	( st != msn_away_state_list ? OPT_AWAY : 0 ),
464	st->name, NULL );
465	}
466	else if( strcmp( cmd[0], "RNG" ) == 0 )
467	{
468	struct msn_switchboard *sb;
469	char *server;
470	int session, port;
471
472	if( num_parts != 7 )
473	{
474	imcb_error( ic, "Syntax error" );
475	imc_logout( ic, TRUE );
476	return( 0 );
477	}
478
479	session = atoi( cmd[1] );
480
481	server = strchr( cmd[2], ':' );
482	if( !server )
483	{
484	imcb_error( ic, "Syntax error" );
485	imc_logout( ic, TRUE );
486	return( 0 );
487	}
488	*server = 0;
489	port = atoi( server + 1 );
490	server = cmd[2];
491
492	if( strcmp( cmd[3], "CKI" ) != 0 )
493	{
494	imcb_error( ic, "Unknown authentication method for switchboard" );
495	imc_logout( ic, TRUE );
496	return( 0 );
497	}
498
499	debug( "Got a call from %s (session %d). Key = %s", cmd[5], session, cmd[4] );
500
501	if( ( sb = msn_sb_create( ic, server, port, cmd[4], session ) ) == NULL )
502	{
503	/* Although this isn't strictly fatal for the NS connection, it's
504	definitely something serious (we ran out of file descriptors?). */
505	imcb_error( ic, "Could not create new switchboard" );
506	imc_logout( ic, TRUE );
507	return( 0 );
508	}
509	else
510	{
511	sb->who = g_strdup( cmd[5] );
512	}
513	}
514	else if( strcmp( cmd[0], "ADD" ) == 0 )
515	{
516	if( num_parts == 6 && strcmp( cmd[2], "RL" ) == 0 )
517	{
518	GSList *l;
519
520	http_decode( cmd[5] );
521
522	if( strchr( cmd[4], '@' ) == NULL )
523	{
524	imcb_error( ic, "Syntax error" );
525	imc_logout( ic, TRUE );
526	return 0;
527	}
528
529	/* We got added by someone. If we don't have this
530	person in permit/deny yet, inform the user. */
531	for( l = ic->permit; l; l = l->next )
532	if( g_strcasecmp( l->data, cmd[4] ) == 0 )
533	return 1;
534
535	for( l = ic->deny; l; l = l->next )
536	if( g_strcasecmp( l->data, cmd[4] ) == 0 )
537	return 1;
538
539	msn_buddy_ask( ic, cmd[4], cmd[5] );
540	}
541	else if( num_parts >= 6 && strcmp( cmd[2], "FL" ) == 0 )
542	{
543	http_decode( cmd[5] );
544	imcb_add_buddy( ic, cmd[4], NULL );
545	imcb_rename_buddy( ic, cmd[4], cmd[5] );
546	}
547	}
548	else if( strcmp( cmd[0], "OUT" ) == 0 )
549	{
550	int allow_reconnect = TRUE;
551
552	if( cmd[1] && strcmp( cmd[1], "OTH" ) == 0 )
553	{
554	imcb_error( ic, "Someone else logged in with your account" );
555	allow_reconnect = FALSE;
556	}
557	else if( cmd[1] && strcmp( cmd[1], "SSD" ) == 0 )
558	{
559	imcb_error( ic, "Terminating session because of server shutdown" );
560	}
561	else
562	{
563	imcb_error( ic, "Session terminated by remote server (reason unknown)" );
564	}
565
566	imc_logout( ic, allow_reconnect );
567	return( 0 );
568	}
569	else if( strcmp( cmd[0], "REA" ) == 0 )
570	{
571	if( num_parts != 5 )
572	{
573	imcb_error( ic, "Syntax error" );
574	imc_logout( ic, TRUE );
575	return( 0 );
576	}
577
578	if( g_strcasecmp( cmd[3], ic->acc->user ) == 0 )
579	{
580	set_t *s;
581
582	http_decode( cmd[4] );
583	strncpy( ic->displayname, cmd[4], sizeof( ic->displayname ) );
584	ic->displayname[sizeof(ic->displayname)-1] = 0;
585
586	if( ( s = set_find( &ic->acc->set, "display_name" ) ) )
587	{
588	g_free( s->value );
589	s->value = g_strdup( cmd[4] );
590	}
591	}
592	else
593	{
594	/* This is not supposed to happen, but let's handle it anyway... */
595	http_decode( cmd[4] );
596	imcb_rename_buddy( ic, cmd[3], cmd[4] );
597	}
598	}
599	else if( strcmp( cmd[0], "IPG" ) == 0 )
600	{
601	imcb_error( ic, "Received IPG command, we don't handle them yet." );
602
603	md->handler->msglen = atoi( cmd[1] );
604
605	if( md->handler->msglen <= 0 )
606	{
607	imcb_error( ic, "Syntax error" );
608	imc_logout( ic, TRUE );
609	return( 0 );
610	}
611	}
612	else if( isdigit( cmd[0][0] ) )
613	{
614	int num = atoi( cmd[0] );
615	const struct msn_status_code *err = msn_status_by_number( num );
616
617	imcb_error( ic, "Error reported by MSN server: %s", err->text );
618
619	if( err->flags & STATUS_FATAL )
620	{
621	imc_logout( ic, TRUE );
622	return( 0 );
623	}
624	}
625	else
626	{
627	/* debug( "Received unknown command from main server: %s", cmd[0] ); */
628	}
629
630	return( 1 );
631	}
632
633	static int msn_ns_message( gpointer data, char msg, int msglen, char *cmd, int num_parts )
634	{
635	struct im_connection *ic = data;
636	char *body;
637	int blen = 0;
638
639	if( !num_parts )
640	return( 1 );
641
642	if( ( body = strstr( msg, "\r\n\r\n" ) ) )
643	{
644	body += 4;
645	blen = msglen - ( body - msg );
646	}
647
648	if( strcmp( cmd[0], "MSG" ) == 0 )
649	{
650	if( g_strcasecmp( cmd[1], "Hotmail" ) == 0 )
651	{
652	char *ct = msn_findheader( msg, "Content-Type:", msglen );
653
654	if( !ct )
655	return( 1 );
656
657	if( g_strncasecmp( ct, "application/x-msmsgssystemmessage", 33 ) == 0 )
658	{
659	char *mtype;
660	char *arg1;
661
662	if( !body )
663	return( 1 );
664
665	mtype = msn_findheader( body, "Type:", blen );
666	arg1 = msn_findheader( body, "Arg1:", blen );
667
668	if( mtype && strcmp( mtype, "1" ) == 0 )
669	{
670	if( arg1 )
671	imcb_log( ic, "The server is going down for maintenance in %s minutes.", arg1 );
672	}
673
674	g_free( arg1 );
675	g_free( mtype );
676	}
677	else if( g_strncasecmp( ct, "text/x-msmsgsprofile", 20 ) == 0 )
678	{
679	/* We don't care about this profile for now... */
680	}
681	else if( g_strncasecmp( ct, "text/x-msmsgsinitialemailnotification", 37 ) == 0 )
682	{
683	if( set_getbool( &ic->acc->set, "mail_notifications" ) )
684	{
685	char *inbox = msn_findheader( body, "Inbox-Unread:", blen );
686	char *folders = msn_findheader( body, "Folders-Unread:", blen );
687
688	if( inbox && folders )
689	imcb_log( ic, "INBOX contains %s new messages, plus %s messages in other folders.", inbox, folders );
690
691	g_free( inbox );
692	g_free( folders );
693	}
694	}
695	else if( g_strncasecmp( ct, "text/x-msmsgsemailnotification", 30 ) == 0 )
696	{
697	if( set_getbool( &ic->acc->set, "mail_notifications" ) )
698	{
699	char *from = msn_findheader( body, "From-Addr:", blen );
700	char *fromname = msn_findheader( body, "From:", blen );
701
702	if( from && fromname )
703	imcb_log( ic, "Received an e-mail message from %s <%s>.", fromname, from );
704
705	g_free( from );
706	g_free( fromname );
707	}
708	}
709	else if( g_strncasecmp( ct, "text/x-msmsgsactivemailnotification", 35 ) == 0 )
710	{
711	/* Sorry, but this one really is USELESS */
712	}
713	else
714	{
715	debug( "Can't handle %s packet from notification server", ct );
716	}
717
718	g_free( ct );
719	}
720	}
721
722	return( 1 );
723	}
724
725	static void msn_auth_got_passport_token( struct msn_auth_data *mad )
726	{
727	struct im_connection *ic = mad->data;
728	struct msn_data *md;
729
730	/* Dead connection? */
731	if( g_slist_find( msn_connections, ic ) == NULL )
732	return;
733
734	md = ic->proto_data;
735	if( mad->token )
736	{
737	char buf[1024];
738
739	g_snprintf( buf, sizeof( buf ), "USR %d TWN S %s\r\n", ++md->trId, mad->token );
740	msn_write( ic, buf, strlen( buf ) );
741	}
742	else
743	{
744	imcb_error( ic, "Error during Passport authentication: %s", mad->error );
745	imc_logout( ic, TRUE );
746	}
747	}

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