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source: protocols/jabber/iq.c @ 5933da7

Last change on this file since 5933da7 was a73e91a, checked in by Wilmer van der Gaast <wilmer@…>, at 2008-02-16T17:38:30Z
Added callback on Jabber add-to-roster requests so buddies get added to the internal buddy list a little bit earlier. This should deal better with Jabber servers that send presence information of a new buddy before the roster push.
Property mode set to `100644`
File size: 18.3 KB

Line
1	/***************************************************************************\
2	* *
3	* BitlBee - An IRC to IM gateway *
4	* Jabber module - IQ packets *
5	* *
6	* Copyright 2006 Wilmer van der Gaast <wilmer@gaast.net> *
7	* *
8	* This program is free software; you can redistribute it and/or modify *
9	* it under the terms of the GNU General Public License as published by *
10	* the Free Software Foundation; either version 2 of the License, or *
11	* (at your option) any later version. *
12	* *
13	* This program is distributed in the hope that it will be useful, *
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16	* GNU General Public License for more details. *
17	* *
18	* You should have received a copy of the GNU General Public License along *
19	* with this program; if not, write to the Free Software Foundation, Inc., *
20	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
21	* *
22	\***************************************************************************/
23
24	#include "jabber.h"
25	#include "sha1.h"
26
27	static xt_status jabber_parse_roster( struct im_connection ic, struct xt_node node, struct xt_node *orig );
28	static xt_status jabber_iq_display_vcard( struct im_connection ic, struct xt_node node, struct xt_node *orig );
29
30	xt_status jabber_pkt_iq( struct xt_node *node, gpointer data )
31	{
32	struct im_connection *ic = data;
33	struct xt_node c, reply = NULL;
34	char type, s;
35	int st, pack = 1;
36
37	type = xt_find_attr( node, "type" );
38
39	if( !type )
40	{
41	imcb_error( ic, "Received IQ packet without type." );
42	imc_logout( ic, TRUE );
43	return XT_ABORT;
44	}
45
46	if( strcmp( type, "result" ) == 0 \|\| strcmp( type, "error" ) == 0 )
47	{
48	return jabber_cache_handle_packet( ic, node );
49	}
50	else if( strcmp( type, "get" ) == 0 )
51	{
52	if( !( ( c = xt_find_node( node->children, "query" ) ) \|\|
53	( c = xt_find_node( node->children, "ping" ) ) ) \|\| /* O_o WHAT is wrong with just <query/> ????? */
54	!( s = xt_find_attr( c, "xmlns" ) ) )
55	{
56	imcb_log( ic, "Warning: Received incomplete IQ-%s packet", type );
57	return XT_HANDLED;
58	}
59
60	reply = xt_new_node( "query", NULL, NULL );
61	xt_add_attr( reply, "xmlns", s );
62
63	/* Of course this is a very essential query to support. ;-) */
64	if( strcmp( s, XMLNS_VERSION ) == 0 )
65	{
66	xt_add_child( reply, xt_new_node( "name", "BitlBee", NULL ) );
67	xt_add_child( reply, xt_new_node( "version", BITLBEE_VERSION, NULL ) );
68	xt_add_child( reply, xt_new_node( "os", ARCH, NULL ) );
69	}
70	else if( strcmp( s, XMLNS_TIME ) == 0 )
71	{
72	time_t time_ep;
73	char buf[1024];
74
75	buf[sizeof(buf)-1] = 0;
76	time_ep = time( NULL );
77
78	strftime( buf, sizeof( buf ) - 1, "%Y%m%dT%H:%M:%S", gmtime( &time_ep ) );
79	xt_add_child( reply, xt_new_node( "utc", buf, NULL ) );
80
81	strftime( buf, sizeof( buf ) - 1, "%Z", localtime( &time_ep ) );
82	xt_add_child( reply, xt_new_node( "tz", buf, NULL ) );
83	}
84	else if( strcmp( s, XMLNS_PING ) == 0 )
85	{
86	xt_free_node( reply );
87	reply = jabber_make_packet( "iq", "result", xt_find_attr( node, "from" ), NULL );
88	if( ( s = xt_find_attr( node, "id" ) ) )
89	xt_add_attr( reply, "id", s );
90	pack = 0;
91	}
92	else if( strcmp( s, XMLNS_DISCOVER ) == 0 )
93	{
94	const char *features[] = { XMLNS_DISCOVER,
95	XMLNS_VERSION,
96	XMLNS_TIME,
97	XMLNS_CHATSTATES,
98	XMLNS_MUC,
99	XMLNS_PING,
100	NULL };
101	const char **f;
102
103	c = xt_new_node( "identity", NULL, NULL );
104	xt_add_attr( c, "category", "client" );
105	xt_add_attr( c, "type", "pc" );
106	xt_add_attr( c, "name", "BitlBee" );
107	xt_add_child( reply, c );
108
109	for( f = features; *f; f ++ )
110	{
111	c = xt_new_node( "feature", NULL, NULL );
112	xt_add_attr( c, "var", *f );
113	xt_add_child( reply, c );
114	}
115	}
116	else
117	{
118	xt_free_node( reply );
119	reply = jabber_make_error_packet( node, "feature-not-implemented", "cancel" );
120	pack = 0;
121	}
122	}
123	else if( strcmp( type, "set" ) == 0 )
124	{
125	if( !( c = xt_find_node( node->children, "query" ) ) \|\|
126	!( s = xt_find_attr( c, "xmlns" ) ) )
127	{
128	imcb_log( ic, "Warning: Received incomplete IQ-%s packet", type );
129	return XT_HANDLED;
130	}
131
132	/* This is a roster push. XMPP servers send this when someone
133	was added to (or removed from) the buddy list. AFAIK they're
134	sent even if we added this buddy in our own session. */
135	if( strcmp( s, XMLNS_ROSTER ) == 0 )
136	{
137	int bare_len = strlen( ic->acc->user );
138
139	if( ( s = xt_find_attr( node, "from" ) ) == NULL \|\|
140	( strncmp( s, ic->acc->user, bare_len ) == 0 &&
141	( s[bare_len] == 0 \|\| s[bare_len] == '/' ) ) )
142	{
143	jabber_parse_roster( ic, node, NULL );
144
145	/* Should we generate a reply here? Don't think it's
146	very important... */
147	}
148	else
149	{
150	imcb_log( ic, "Warning: %s tried to fake a roster push!", s ? s : "(unknown)" );
151
152	xt_free_node( reply );
153	reply = jabber_make_error_packet( node, "not-allowed", "cancel" );
154	pack = 0;
155	}
156	}
157	else
158	{
159	xt_free_node( reply );
160	reply = jabber_make_error_packet( node, "feature-not-implemented", "cancel" );
161	pack = 0;
162	}
163	}
164
165	/* If we recognized the xmlns and managed to generate a reply,
166	finish and send it. */
167	if( reply )
168	{
169	/* Normally we still have to pack it into an iq-result
170	packet, but for errors, for example, we don't. */
171	if( pack )
172	{
173	reply = jabber_make_packet( "iq", "result", xt_find_attr( node, "from" ), reply );
174	if( ( s = xt_find_attr( node, "id" ) ) )
175	xt_add_attr( reply, "id", s );
176	}
177
178	st = jabber_write_packet( ic, reply );
179	xt_free_node( reply );
180	if( !st )
181	return XT_ABORT;
182	}
183
184	return XT_HANDLED;
185	}
186
187	static xt_status jabber_do_iq_auth( struct im_connection ic, struct xt_node node, struct xt_node *orig );
188	static xt_status jabber_finish_iq_auth( struct im_connection ic, struct xt_node node, struct xt_node *orig );
189
190	int jabber_init_iq_auth( struct im_connection *ic )
191	{
192	struct jabber_data *jd = ic->proto_data;
193	struct xt_node *node;
194	int st;
195
196	node = xt_new_node( "query", NULL, xt_new_node( "username", jd->username, NULL ) );
197	xt_add_attr( node, "xmlns", XMLNS_AUTH );
198	node = jabber_make_packet( "iq", "get", NULL, node );
199
200	jabber_cache_add( ic, node, jabber_do_iq_auth );
201	st = jabber_write_packet( ic, node );
202
203	return st;
204	}
205
206	static xt_status jabber_do_iq_auth( struct im_connection ic, struct xt_node node, struct xt_node *orig )
207	{
208	struct jabber_data *jd = ic->proto_data;
209	struct xt_node reply, query;
210	xt_status st;
211	char *s;
212
213	if( !( query = xt_find_node( node->children, "query" ) ) )
214	{
215	imcb_log( ic, "Warning: Received incomplete IQ packet while authenticating" );
216	imc_logout( ic, FALSE );
217	return XT_HANDLED;
218	}
219
220	/* Time to authenticate ourselves! */
221	reply = xt_new_node( "query", NULL, NULL );
222	xt_add_attr( reply, "xmlns", XMLNS_AUTH );
223	xt_add_child( reply, xt_new_node( "username", jd->username, NULL ) );
224	xt_add_child( reply, xt_new_node( "resource", set_getstr( &ic->acc->set, "resource" ), NULL ) );
225
226	if( xt_find_node( query->children, "digest" ) && ( s = xt_find_attr( jd->xt->root, "id" ) ) )
227	{
228	/* We can do digest authentication, it seems, and of
229	course we prefer that. */
230	sha1_state_t sha;
231	char hash_hex[41];
232	unsigned char hash[20];
233	int i;
234
235	sha1_init( &sha );
236	sha1_append( &sha, (unsigned char*) s, strlen( s ) );
237	sha1_append( &sha, (unsigned char*) ic->acc->pass, strlen( ic->acc->pass ) );
238	sha1_finish( &sha, hash );
239
240	for( i = 0; i < 20; i ++ )
241	sprintf( hash_hex + i * 2, "%02x", hash[i] );
242
243	xt_add_child( reply, xt_new_node( "digest", hash_hex, NULL ) );
244	}
245	else if( xt_find_node( query->children, "password" ) )
246	{
247	/* We'll have to stick with plaintext. Let's hope we're using SSL/TLS... */
248	xt_add_child( reply, xt_new_node( "password", ic->acc->pass, NULL ) );
249	}
250	else
251	{
252	xt_free_node( reply );
253
254	imcb_error( ic, "Can't find suitable authentication method" );
255	imc_logout( ic, FALSE );
256	return XT_ABORT;
257	}
258
259	reply = jabber_make_packet( "iq", "set", NULL, reply );
260	jabber_cache_add( ic, reply, jabber_finish_iq_auth );
261	st = jabber_write_packet( ic, reply );
262
263	return st ? XT_HANDLED : XT_ABORT;
264	}
265
266	static xt_status jabber_finish_iq_auth( struct im_connection ic, struct xt_node node, struct xt_node *orig )
267	{
268	struct jabber_data *jd = ic->proto_data;
269	char *type;
270
271	if( !( type = xt_find_attr( node, "type" ) ) )
272	{
273	imcb_log( ic, "Warning: Received incomplete IQ packet while authenticating" );
274	imc_logout( ic, FALSE );
275	return XT_HANDLED;
276	}
277
278	if( strcmp( type, "error" ) == 0 )
279	{
280	imcb_error( ic, "Authentication failure" );
281	imc_logout( ic, FALSE );
282	return XT_ABORT;
283	}
284	else if( strcmp( type, "result" ) == 0 )
285	{
286	/* This happens when we just successfully authenticated the
287	old (non-SASL) way. */
288	jd->flags \|= JFLAG_AUTHENTICATED;
289	if( !jabber_get_roster( ic ) )
290	return XT_ABORT;
291	}
292
293	return XT_HANDLED;
294	}
295
296	xt_status jabber_pkt_bind_sess( struct im_connection ic, struct xt_node node, struct xt_node *orig )
297	{
298	struct jabber_data *jd = ic->proto_data;
299	struct xt_node *c;
300	char *s;
301
302	if( ( c = xt_find_node( node->children, "bind" ) ) )
303	{
304	c = xt_find_node( c->children, "jid" );
305	if( c && c->text_len && ( s = strchr( c->text, '/' ) ) &&
306	strcmp( s + 1, set_getstr( &ic->acc->set, "resource" ) ) != 0 )
307	imcb_log( ic, "Server changed session resource string to `%s'", s + 1 );
308
309	jd->flags &= ~JFLAG_WAIT_BIND;
310	}
311	else
312	{
313	jd->flags &= ~JFLAG_WAIT_SESSION;
314	}
315
316	if( ( jd->flags & ( JFLAG_WAIT_BIND \| JFLAG_WAIT_SESSION ) ) == 0 )
317	{
318	if( !jabber_get_roster( ic ) )
319	return XT_ABORT;
320	}
321
322	return XT_HANDLED;
323	}
324
325	int jabber_get_roster( struct im_connection *ic )
326	{
327	struct xt_node *node;
328	int st;
329
330	imcb_log( ic, "Authenticated, requesting buddy list" );
331
332	node = xt_new_node( "query", NULL, NULL );
333	xt_add_attr( node, "xmlns", XMLNS_ROSTER );
334	node = jabber_make_packet( "iq", "get", NULL, node );
335
336	jabber_cache_add( ic, node, jabber_parse_roster );
337	st = jabber_write_packet( ic, node );
338
339	return st;
340	}
341
342	static xt_status jabber_parse_roster( struct im_connection ic, struct xt_node node, struct xt_node *orig )
343	{
344	struct xt_node query, c;
345	int initial = ( orig != NULL );
346
347	if( !( query = xt_find_node( node->children, "query" ) ) )
348	{
349	imcb_log( ic, "Warning: Received NULL roster packet" );
350	return XT_HANDLED;
351	}
352
353	c = query->children;
354	while( ( c = xt_find_node( c, "item" ) ) )
355	{
356	struct xt_node *group = xt_find_node( node->children, "group" );
357	char *jid = xt_find_attr( c, "jid" );
358	char *name = xt_find_attr( c, "name" );
359	char *sub = xt_find_attr( c, "subscription" );
360
361	if( jid && sub )
362	{
363	if( ( strcmp( sub, "both" ) == 0 \|\| strcmp( sub, "to" ) == 0 ) )
364	{
365	if( initial \|\| imcb_find_buddy( ic, jid ) == NULL )
366	imcb_add_buddy( ic, jid, ( group && group->text_len ) ?
367	group->text : NULL );
368
369	if( name )
370	imcb_rename_buddy( ic, jid, name );
371	}
372	else if( strcmp( sub, "remove" ) == 0 )
373	{
374	jabber_buddy_remove_bare( ic, jid );
375	imcb_remove_buddy( ic, jid, NULL );
376	}
377	}
378
379	c = c->next;
380	}
381
382	if( initial )
383	imcb_connected( ic );
384
385	return XT_HANDLED;
386	}
387
388	int jabber_get_vcard( struct im_connection ic, char bare_jid )
389	{
390	struct xt_node *node;
391
392	if( strchr( bare_jid, '/' ) )
393	return 1; /* This was an error, but return 0 should only be done if the connection died... */
394
395	node = xt_new_node( "vCard", NULL, NULL );
396	xt_add_attr( node, "xmlns", XMLNS_VCARD );
397	node = jabber_make_packet( "iq", "get", bare_jid, node );
398
399	jabber_cache_add( ic, node, jabber_iq_display_vcard );
400	return jabber_write_packet( ic, node );
401	}
402
403	static xt_status jabber_iq_display_vcard( struct im_connection ic, struct xt_node node, struct xt_node *orig )
404	{
405	struct xt_node vc, c, sc; / subchild, ic is already in use ;-) */
406	GString *reply;
407	char *s;
408
409	if( ( s = xt_find_attr( node, "type" ) ) == NULL \|\|
410	strcmp( s, "result" ) != 0 \|\|
411	( vc = xt_find_node( node->children, "vCard" ) ) == NULL )
412	{
413	s = xt_find_attr( orig, "to" ); /* If this returns NULL something's wrong.. */
414	imcb_log( ic, "Could not retrieve vCard of %s", s ? s : "(NULL)" );
415	return XT_HANDLED;
416	}
417
418	s = xt_find_attr( orig, "to" );
419	reply = g_string_new( "vCard information for " );
420	reply = g_string_append( reply, s ? s : "(NULL)" );
421	reply = g_string_append( reply, ":\n" );
422
423	/* I hate this format, I really do... */
424
425	if( ( c = xt_find_node( vc->children, "FN" ) ) && c->text_len )
426	g_string_append_printf( reply, "Name: %s\n", c->text );
427
428	if( ( c = xt_find_node( vc->children, "N" ) ) && c->children )
429	{
430	reply = g_string_append( reply, "Full name:" );
431
432	if( ( sc = xt_find_node( c->children, "PREFIX" ) ) && sc->text_len )
433	g_string_append_printf( reply, " %s", sc->text );
434	if( ( sc = xt_find_node( c->children, "GIVEN" ) ) && sc->text_len )
435	g_string_append_printf( reply, " %s", sc->text );
436	if( ( sc = xt_find_node( c->children, "MIDDLE" ) ) && sc->text_len )
437	g_string_append_printf( reply, " %s", sc->text );
438	if( ( sc = xt_find_node( c->children, "FAMILY" ) ) && sc->text_len )
439	g_string_append_printf( reply, " %s", sc->text );
440	if( ( sc = xt_find_node( c->children, "SUFFIX" ) ) && sc->text_len )
441	g_string_append_printf( reply, " %s", sc->text );
442
443	reply = g_string_append_c( reply, '\n' );
444	}
445
446	if( ( c = xt_find_node( vc->children, "NICKNAME" ) ) && c->text_len )
447	g_string_append_printf( reply, "Nickname: %s\n", c->text );
448
449	if( ( c = xt_find_node( vc->children, "BDAY" ) ) && c->text_len )
450	g_string_append_printf( reply, "Date of birth: %s\n", c->text );
451
452	/* Slightly alternative use of for... ;-) */
453	for( c = vc->children; ( c = xt_find_node( c, "EMAIL" ) ); c = c->next )
454	{
455	if( ( sc = xt_find_node( c->children, "USERID" ) ) == NULL \|\| sc->text_len == 0 )
456	continue;
457
458	if( xt_find_node( c->children, "HOME" ) )
459	s = "Home";
460	else if( xt_find_node( c->children, "WORK" ) )
461	s = "Work";
462	else
463	s = "Misc.";
464
465	g_string_append_printf( reply, "%s e-mail address: %s\n", s, sc->text );
466	}
467
468	if( ( c = xt_find_node( vc->children, "URL" ) ) && c->text_len )
469	g_string_append_printf( reply, "Homepage: %s\n", c->text );
470
471	/* Slightly alternative use of for... ;-) */
472	for( c = vc->children; ( c = xt_find_node( c, "ADR" ) ); c = c->next )
473	{
474	if( xt_find_node( c->children, "HOME" ) )
475	s = "Home";
476	else if( xt_find_node( c->children, "WORK" ) )
477	s = "Work";
478	else
479	s = "Misc.";
480
481	g_string_append_printf( reply, "%s address: ", s );
482
483	if( ( sc = xt_find_node( c->children, "STREET" ) ) && sc->text_len )
484	g_string_append_printf( reply, "%s ", sc->text );
485	if( ( sc = xt_find_node( c->children, "EXTADR" ) ) && sc->text_len )
486	g_string_append_printf( reply, "%s, ", sc->text );
487	if( ( sc = xt_find_node( c->children, "PCODE" ) ) && sc->text_len )
488	g_string_append_printf( reply, "%s, ", sc->text );
489	if( ( sc = xt_find_node( c->children, "LOCALITY" ) ) && sc->text_len )
490	g_string_append_printf( reply, "%s, ", sc->text );
491	if( ( sc = xt_find_node( c->children, "REGION" ) ) && sc->text_len )
492	g_string_append_printf( reply, "%s, ", sc->text );
493	if( ( sc = xt_find_node( c->children, "CTRY" ) ) && sc->text_len )
494	g_string_append_printf( reply, "%s", sc->text );
495
496	if( reply->str[reply->len-2] == ',' )
497	reply = g_string_truncate( reply, reply->len-2 );
498
499	reply = g_string_append_c( reply, '\n' );
500	}
501
502	for( c = vc->children; ( c = xt_find_node( c, "TEL" ) ); c = c->next )
503	{
504	if( ( sc = xt_find_node( c->children, "NUMBER" ) ) == NULL \|\| sc->text_len == 0 )
505	continue;
506
507	if( xt_find_node( c->children, "HOME" ) )
508	s = "Home";
509	else if( xt_find_node( c->children, "WORK" ) )
510	s = "Work";
511	else
512	s = "Misc.";
513
514	g_string_append_printf( reply, "%s phone number: %s\n", s, sc->text );
515	}
516
517	if( ( c = xt_find_node( vc->children, "DESC" ) ) && c->text_len )
518	g_string_append_printf( reply, "Other information:\n%s", c->text );
519
520	/* sigh */
521
522	imcb_log( ic, "%s", reply->str );
523	g_string_free( reply, TRUE );
524
525	return XT_HANDLED;
526	}
527
528	static xt_status jabber_add_to_roster_callback( struct im_connection ic, struct xt_node node, struct xt_node *orig );
529
530	int jabber_add_to_roster( struct im_connection ic, char handle, char *name )
531	{
532	struct xt_node *node;
533	int st;
534
535	/* Build the item entry */
536	node = xt_new_node( "item", NULL, NULL );
537	xt_add_attr( node, "jid", handle );
538	if( name )
539	xt_add_attr( node, "name", name );
540
541	/* And pack it into a roster-add packet */
542	node = xt_new_node( "query", NULL, node );
543	xt_add_attr( node, "xmlns", XMLNS_ROSTER );
544	node = jabber_make_packet( "iq", "set", NULL, node );
545	jabber_cache_add( ic, node, jabber_add_to_roster_callback );
546
547	st = jabber_write_packet( ic, node );
548
549	return st;
550	}
551
552	static xt_status jabber_add_to_roster_callback( struct im_connection ic, struct xt_node node, struct xt_node *orig )
553	{
554	char s, jid = NULL;
555	struct xt_node *c;
556
557	if( ( c = xt_find_node( orig->children, "query" ) ) &&
558	( c = xt_find_node( c->children, "item" ) ) &&
559	( jid = xt_find_attr( c, "jid" ) ) &&
560	( s = xt_find_attr( node, "type" ) ) &&
561	strcmp( s, "result" ) == 0 )
562	{
563	if( imcb_find_buddy( ic, jid ) == NULL )
564	imcb_add_buddy( ic, jid, NULL );
565	}
566	else
567	{
568	imcb_log( ic, "Error while adding `%s' to your contact list.",
569	jid ? jid : "(unknown handle)" );
570	}
571
572	return XT_HANDLED;
573	}
574
575	int jabber_remove_from_roster( struct im_connection ic, char handle )
576	{
577	struct xt_node *node;
578	int st;
579
580	/* Build the item entry */
581	node = xt_new_node( "item", NULL, NULL );
582	xt_add_attr( node, "jid", handle );
583	xt_add_attr( node, "subscription", "remove" );
584
585	/* And pack it into a roster-add packet */
586	node = xt_new_node( "query", NULL, node );
587	xt_add_attr( node, "xmlns", XMLNS_ROSTER );
588	node = jabber_make_packet( "iq", "set", NULL, node );
589
590	st = jabber_write_packet( ic, node );
591
592	xt_free_node( node );
593	return st;
594	}

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