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source: protocols/jabber/si.c @ 386042c

Last change on this file since 386042c was bd599b9, checked in by Wilmer van der Gaast <wilmer@…>, at 2010-08-22T08:07:48Z
Fix two compiler warnings.
Property mode set to `100644`
File size: 16.9 KB

Rev	Line
[2c2df7d]	1	/***************************************************************************\
	2	* *
	3	* BitlBee - An IRC to IM gateway *
	4	* Jabber module - SI packets *
	5	* *
	6	* Copyright 2007 Uli Meis <a.sporto+bee@gmail.com> *
	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	void jabber_si_answer_request( file_transfer_t *ft );
[2ff2076]	28	int jabber_si_send_request(struct im_connection ic, char who, struct jabber_transfer *tf );
[2c2df7d]	29
[2ff2076]	30	/* file_transfer free() callback */
[2c2df7d]	31	void jabber_si_free_transfer( file_transfer_t *ft)
	32	{
	33	struct jabber_transfer *tf = ft->data;
	34	struct jabber_data *jd = tf->ic->proto_data;
	35
	36	if ( tf->watch_in )
	37	b_event_remove( tf->watch_in );
	38
	39	jd->filetransfers = g_slist_remove( jd->filetransfers, tf );
	40
[8a90001]	41	if( tf->fd != -1 )
[2c2df7d]	42	{
[b8a491d]	43	closesocket( tf->fd );
[8a90001]	44	tf->fd = -1;
[2c2df7d]	45	}
	46
[b5cfc2b]	47	if( tf->disco_timeout )
	48	b_event_remove( tf->disco_timeout );
	49
[2c2df7d]	50	g_free( tf->ini_jid );
	51	g_free( tf->tgt_jid );
	52	g_free( tf->iq_id );
	53	g_free( tf->sid );
[78d254f1]	54	g_free( tf );
[2c2df7d]	55	}
	56
[2ff2076]	57	/* file_transfer canceled() callback */
[2c2df7d]	58	void jabber_si_canceled( file_transfer_t ft, char reason )
	59	{
	60	struct jabber_transfer *tf = ft->data;
	61	struct xt_node reply, iqnode;
	62
	63	if( tf->accepted )
	64	return;
	65
	66	iqnode = jabber_make_packet( "iq", "error", tf->ini_jid, NULL );
	67	xt_add_attr( iqnode, "id", tf->iq_id );
	68	reply = jabber_make_error_packet( iqnode, "forbidden", "cancel", "403" );
	69	xt_free_node( iqnode );
	70
	71	if( !jabber_write_packet( tf->ic, reply ) )
	72	imcb_log( tf->ic, "WARNING: Error generating reply to file transfer request" );
	73	xt_free_node( reply );
	74
	75	}
	76
[b5cfc2b]	77	int jabber_si_check_features( struct jabber_transfer tf, GSList features ) {
	78	int foundft = FALSE, foundbt = FALSE, foundsi = FALSE;
	79
	80	while ( features )
	81	{
	82	if( !strcmp( features->data, XMLNS_FILETRANSFER ) )
	83	foundft = TRUE;
	84	if( !strcmp( features->data, XMLNS_BYTESTREAMS ) )
	85	foundbt = TRUE;
	86	if( !strcmp( features->data, XMLNS_SI ) )
	87	foundsi = TRUE;
	88
	89	features = g_slist_next(features);
	90	}
	91
	92	if( !foundft )
[17a6ee9]	93	imcb_file_canceled( tf->ic, tf->ft, "Buddy's client doesn't feature file transfers" );
[b5cfc2b]	94	else if( !foundbt )
[17a6ee9]	95	imcb_file_canceled( tf->ic, tf->ft, "Buddy's client doesn't feature byte streams (required)" );
[b5cfc2b]	96	else if( !foundsi )
[17a6ee9]	97	imcb_file_canceled( tf->ic, tf->ft, "Buddy's client doesn't feature stream initiation (required)" );
[b5cfc2b]	98
	99	return foundft && foundbt && foundsi;
	100	}
	101
	102	void jabber_si_transfer_start( struct jabber_transfer *tf ) {
	103
	104	if( !jabber_si_check_features( tf, tf->bud->features ) )
	105	return;
	106
	107	/* send the request to our buddy */
	108	jabber_si_send_request( tf->ic, tf->bud->full_jid, tf );
	109
	110	/* and start the receive logic */
[17a6ee9]	111	imcb_file_recv_start( tf->ic, tf->ft );
[b5cfc2b]	112
	113	}
	114
	115	gboolean jabber_si_waitfor_disco( gpointer data, gint fd, b_input_condition cond )
	116	{
	117	struct jabber_transfer *tf = data;
	118	struct jabber_data *jd = tf->ic->proto_data;
	119
	120	tf->disco_timeout_fired++;
	121
	122	if( tf->bud->features && jd->have_streamhosts==1 ) {
	123	tf->disco_timeout = 0;
[8a90001]	124	jabber_si_transfer_start( tf );
[b5cfc2b]	125	return FALSE;
	126	}
	127
	128	/* 8 seconds should be enough for server and buddy to respond */
	129	if ( tf->disco_timeout_fired < 16 )
	130	return TRUE;
	131
	132	if( !tf->bud->features && jd->have_streamhosts!=1 )
[8a90001]	133	imcb_log( tf->ic, "Couldn't get buddy's features nor discover all services of the server" );
[b5cfc2b]	134	else if( !tf->bud->features )
[8a90001]	135	imcb_log( tf->ic, "Couldn't get buddy's features" );
[b5cfc2b]	136	else
[8a90001]	137	imcb_log( tf->ic, "Couldn't discover some of the server's services" );
[b5cfc2b]	138
	139	tf->disco_timeout = 0;
[8a90001]	140	jabber_si_transfer_start( tf );
[b5cfc2b]	141	return FALSE;
	142	}
	143
[2ff2076]	144	void jabber_si_transfer_request( struct im_connection ic, file_transfer_t ft, char *who )
	145	{
	146	struct jabber_transfer *tf;
	147	struct jabber_data *jd = ic->proto_data;
[b5cfc2b]	148	struct jabber_buddy *bud;
	149	char server = jd->server, s;
	150
	151	if( ( s = strchr( who, '=' ) ) && jabber_chat_by_jid( ic, s + 1 ) )
	152	bud = jabber_buddy_by_ext_jid( ic, who, 0 );
	153	else
	154	bud = jabber_buddy_by_jid( ic, who, 0 );
[2ff2076]	155
[b5cfc2b]	156	if( bud == NULL )
	157	{
[17a6ee9]	158	imcb_file_canceled( ic, ft, "Couldn't find buddy (BUG?)" );
[b5cfc2b]	159	return;
	160	}
[b8a491d]	161
[dce3903]	162	imcb_log( ic, "Trying to send %s(%zd bytes) to %s", ft->file_name, ft->file_size, who );
[2ff2076]	163
	164	tf = g_new0( struct jabber_transfer, 1 );
	165
	166	tf->ic = ic;
	167	tf->ft = ft;
[8a90001]	168	tf->fd = -1;
[2ff2076]	169	tf->ft->data = tf;
	170	tf->ft->free = jabber_si_free_transfer;
[b5cfc2b]	171	tf->bud = bud;
[2ff2076]	172	ft->write = jabber_bs_send_write;
	173
	174	jd->filetransfers = g_slist_prepend( jd->filetransfers, tf );
	175
[b5cfc2b]	176	/* query buddy's features and server's streaming proxies if neccessary */
[dc0ba9c]	177
[b5cfc2b]	178	if( !tf->bud->features )
	179	jabber_iq_query_features( ic, bud->full_jid );
[dc0ba9c]	180
[8a90001]	181	/* If <auto> is not set don't check for proxies */
	182	if( ( jd->have_streamhosts!=1 ) && ( jd->streamhosts==NULL ) &&
	183	( strstr( set_getstr( &ic->acc->set, "proxy" ), "<auto>" ) != NULL ) ) {
[b5cfc2b]	184	jd->have_streamhosts = 0;
	185	jabber_iq_query_server( ic, server, XMLNS_DISCO_ITEMS );
[8a90001]	186	} else if ( jd->streamhosts!=NULL )
	187	jd->have_streamhosts = 1;
[2ff2076]	188
[b5cfc2b]	189	/* if we had to do a query, wait for the result.
	190	* Otherwise fire away. */
	191	if( !tf->bud->features \|\| jd->have_streamhosts!=1 )
	192	tf->disco_timeout = b_timeout_add( 500, jabber_si_waitfor_disco, tf );
	193	else
	194	jabber_si_transfer_start( tf );
[2ff2076]	195	}
	196
[2c2df7d]	197	/*
	198	* First function that gets called when a file transfer request comes in.
	199	* A lot to parse.
	200	*
	201	* We choose a stream type from the options given by the initiator.
	202	* Then we wait for imcb to call the accept or cancel callbacks.
	203	*/
	204	int jabber_si_handle_request( struct im_connection ic, struct xt_node node, struct xt_node *sinode)
	205	{
	206	struct xt_node c, d, *reply;
[78d254f1]	207	char sid, ini_jid, tgt_jid, iq_id, s, ext_jid, *size_s;
[2c2df7d]	208	struct jabber_buddy *bud;
	209	int requestok = FALSE;
[aed152f]	210	char name, cmp;
[2c2df7d]	211	size_t size;
	212	struct jabber_transfer *tf;
	213	struct jabber_data *jd = ic->proto_data;
	214	file_transfer_t *ft;
	215
	216	/* All this means we expect something like this: ( I think )
	217	* <iq from=... to=... id=...>
	218	* <si id=id xmlns=si profile=ft>
	219	* <file xmlns=ft/>
	220	* <feature xmlns=feature>
	221	* <x xmlns=xdata type=submit>
	222	* <field var=stream-method>
	223	*
	224	*/
	225	if( !( ini_jid = xt_find_attr( node, "from" ) ) \|\|
	226	!( tgt_jid = xt_find_attr( node, "to" ) ) \|\|
	227	!( iq_id = xt_find_attr( node, "id" ) ) \|\|
	228	!( sid = xt_find_attr( sinode, "id" ) ) \|\|
[aed152f]	229	!( cmp = xt_find_attr( sinode, "profile" ) ) \|\|
	230	!( 0 == strcmp( cmp, XMLNS_FILETRANSFER ) ) \|\|
[2c2df7d]	231	!( d = xt_find_node( sinode->children, "file" ) ) \|\|
[aed152f]	232	!( cmp = xt_find_attr( d, "xmlns" ) ) \|\|
	233	!( 0 == strcmp( cmp, XMLNS_FILETRANSFER ) ) \|\|
[2c2df7d]	234	!( name = xt_find_attr( d, "name" ) ) \|\|
[78d254f1]	235	!( size_s = xt_find_attr( d, "size" ) ) \|\|
[b8a491d]	236	!( 1 == sscanf( size_s, "%zd", &size ) ) \|\|
[2c2df7d]	237	!( d = xt_find_node( sinode->children, "feature" ) ) \|\|
[aed152f]	238	!( cmp = xt_find_attr( d, "xmlns" ) ) \|\|
	239	!( 0 == strcmp( cmp, XMLNS_FEATURE ) ) \|\|
[2c2df7d]	240	!( d = xt_find_node( d->children, "x" ) ) \|\|
[aed152f]	241	!( cmp = xt_find_attr( d, "xmlns" ) ) \|\|
	242	!( 0 == strcmp( cmp, XMLNS_XDATA ) ) \|\|
	243	!( cmp = xt_find_attr( d, "type" ) ) \|\|
	244	!( 0 == strcmp( cmp, "form" ) ) \|\|
[2c2df7d]	245	!( d = xt_find_node( d->children, "field" ) ) \|\|
[aed152f]	246	!( cmp = xt_find_attr( d, "var" ) ) \|\|
	247	!( 0 == strcmp( cmp, "stream-method" ) ) )
[2c2df7d]	248	{
	249	imcb_log( ic, "WARNING: Received incomplete Stream Initiation request" );
[b8a491d]	250	}
	251	else
[2c2df7d]	252	{
	253	/* Check if we support one of the options */
	254
	255	c = d->children;
	256	while( ( c = xt_find_node( c, "option" ) ) )
[b8a491d]	257	if( ( d = xt_find_node( c->children, "value" ) ) &&
[699376f7]	258	( d->text != NULL ) &&
[b8a491d]	259	( strcmp( d->text, XMLNS_BYTESTREAMS ) == 0 ) )
[2c2df7d]	260	{
	261	requestok = TRUE;
	262	break;
	263	}
[1bb1e01]	264	else
	265	{
	266	c = c->next;
	267	}
[2ff2076]	268
	269	if ( !requestok )
	270	imcb_log( ic, "WARNING: Unsupported file transfer request from %s", ini_jid);
[2c2df7d]	271	}
	272
[b8a491d]	273	if( requestok )
[2c2df7d]	274	{
	275	/* Figure out who the transfer should come frome... */
	276
[b8a491d]	277	ext_jid = ini_jid;
[2c2df7d]	278	if( ( s = strchr( ini_jid, '/' ) ) )
	279	{
	280	if( ( bud = jabber_buddy_by_jid( ic, ini_jid, GET_BUDDY_EXACT ) ) )
	281	{
[1cc0df3]	282	bud->last_msg = time( NULL );
[2c2df7d]	283	ext_jid = bud->ext_jid ? : bud->bare_jid;
	284	}
	285	else
	286	s = 0; / We need to generate a bare JID now. */
	287	}
	288
	289	if( !( ft = imcb_file_send_start( ic, ext_jid, name, size ) ) )
	290	{
	291	imcb_log( ic, "WARNING: Error handling transfer request from %s", ini_jid);
	292	requestok = FALSE;
	293	}
	294
	295	*s = '/';
[2ff2076]	296	}
[b8a491d]	297	else
[2c2df7d]	298	{
	299	reply = jabber_make_error_packet( node, "item-not-found", "cancel", NULL );
	300	if (!jabber_write_packet( ic, reply ))
	301	imcb_log( ic, "WARNING: Error generating reply to file transfer request" );
	302	xt_free_node( reply );
	303	return XT_HANDLED;
	304	}
	305
	306	/* Request is fine. */
	307
	308	tf = g_new0( struct jabber_transfer, 1 );
	309
	310	tf->ini_jid = g_strdup( ini_jid );
	311	tf->tgt_jid = g_strdup( tgt_jid );
	312	tf->iq_id = g_strdup( iq_id );
	313	tf->sid = g_strdup( sid );
	314	tf->ic = ic;
	315	tf->ft = ft;
[8a90001]	316	tf->fd = -1;
[2c2df7d]	317	tf->ft->data = tf;
	318	tf->ft->accept = jabber_si_answer_request;
	319	tf->ft->free = jabber_si_free_transfer;
	320	tf->ft->canceled = jabber_si_canceled;
	321
	322	jd->filetransfers = g_slist_prepend( jd->filetransfers, tf );
	323
	324	return XT_HANDLED;
	325	}
	326
	327	/*
[dce3903]	328	* imc called the accept callback which probably means that the user accepted this file transfer.
[2c2df7d]	329	* We send our response to the initiator.
	330	* In the next step, the initiator will send us a request for the given stream type.
	331	* (currently that can only be a SOCKS5 bytestream)
	332	*/
	333	void jabber_si_answer_request( file_transfer_t *ft ) {
	334	struct jabber_transfer *tf = ft->data;
	335	struct xt_node node, sinode, *reply;
	336
	337	/* generate response, start with the SI tag */
	338	sinode = xt_new_node( "si", NULL, NULL );
	339	xt_add_attr( sinode, "xmlns", XMLNS_SI );
	340	xt_add_attr( sinode, "profile", XMLNS_FILETRANSFER );
	341	xt_add_attr( sinode, "id", tf->sid );
	342
	343	/* now the file tag */
	344	node = xt_new_node( "file", NULL, NULL );
	345	xt_add_attr( node, "xmlns", XMLNS_FILETRANSFER );
	346
	347	xt_add_child( sinode, node );
	348
	349	/* and finally the feature tag */
	350	node = xt_new_node( "field", NULL, NULL );
	351	xt_add_attr( node, "var", "stream-method" );
	352	xt_add_attr( node, "type", "list-single" );
	353
	354	/* Currently all we can do. One could also implement in-band (IBB) */
	355	xt_add_child( node, xt_new_node( "value", XMLNS_BYTESTREAMS, NULL ) );
	356
	357	node = xt_new_node( "x", NULL, node );
	358	xt_add_attr( node, "xmlns", XMLNS_XDATA );
	359	xt_add_attr( node, "type", "submit" );
	360
	361	node = xt_new_node( "feature", NULL, node );
	362	xt_add_attr( node, "xmlns", XMLNS_FEATURE );
	363
	364	xt_add_child( sinode, node );
	365
	366	reply = jabber_make_packet( "iq", "result", tf->ini_jid, sinode );
	367	xt_add_attr( reply, "id", tf->iq_id );
	368
	369	if( !jabber_write_packet( tf->ic, reply ) )
	370	imcb_log( tf->ic, "WARNING: Error generating reply to file transfer request" );
	371	else
	372	tf->accepted = TRUE;
	373	xt_free_node( reply );
	374	}
[2ff2076]	375
	376	static xt_status jabber_si_handle_response(struct im_connection ic, struct xt_node node, struct xt_node *orig )
	377	{
	378	struct xt_node c, d;
[bd599b9]	379	char ini_jid = NULL, tgt_jid, iq_id, cmp;
[2ff2076]	380	GSList *tflist;
	381	struct jabber_transfer *tf=NULL;
	382	struct jabber_data *jd = ic->proto_data;
	383
	384	if( !( tgt_jid = xt_find_attr( node, "from" ) ) \|\|
	385	!( ini_jid = xt_find_attr( node, "to" ) ) )
	386	{
	387	imcb_log( ic, "Invalid SI response from=%s to=%s", tgt_jid, ini_jid );
	388	return XT_HANDLED;
	389	}
	390
	391	/* All this means we expect something like this: ( I think )
[dce3903]	392	* <iq from=... to=... id=...>
[2ff2076]	393	* <si xmlns=si>
[dce3903]	394	* [ <file xmlns=ft/> ] <-- not neccessary
[2ff2076]	395	* <feature xmlns=feature>
	396	* <x xmlns=xdata type=submit>
	397	* <field var=stream-method>
	398	* <value>
	399	*/
	400	if( !( tgt_jid = xt_find_attr( node, "from" ) ) \|\|
	401	!( ini_jid = xt_find_attr( node, "to" ) ) \|\|
[dce3903]	402	!( iq_id = xt_find_attr( node, "id" ) ) \|\|
[2ff2076]	403	!( c = xt_find_node( node->children, "si" ) ) \|\|
[aed152f]	404	!( cmp = xt_find_attr( c, "xmlns" ) ) \|\|
	405	!( strcmp( cmp, XMLNS_SI ) == 0 ) \|\|
[2ff2076]	406	!( d = xt_find_node( c->children, "feature" ) ) \|\|
[aed152f]	407	!( cmp = xt_find_attr( d, "xmlns" ) ) \|\|
	408	!( strcmp( cmp, XMLNS_FEATURE ) == 0 ) \|\|
[2ff2076]	409	!( d = xt_find_node( d->children, "x" ) ) \|\|
[aed152f]	410	!( cmp = xt_find_attr( d, "xmlns" ) ) \|\|
	411	!( strcmp( cmp, XMLNS_XDATA ) == 0 ) \|\|
	412	!( cmp = xt_find_attr( d, "type" ) ) \|\|
	413	!( strcmp( cmp, "submit" ) == 0 ) \|\|
[2ff2076]	414	!( d = xt_find_node( d->children, "field" ) ) \|\|
[aed152f]	415	!( cmp = xt_find_attr( d, "var" ) ) \|\|
	416	!( strcmp( cmp, "stream-method" ) == 0 ) \|\|
[2ff2076]	417	!( d = xt_find_node( d->children, "value" ) ) )
	418	{
	419	imcb_log( ic, "WARNING: Received incomplete Stream Initiation response" );
	420	return XT_HANDLED;
	421	}
	422
	423	if( !( strcmp( d->text, XMLNS_BYTESTREAMS ) == 0 ) ) {
	424	/* since we should only have advertised what we can do and the peer should
	425	* only have chosen what we offered, this should never happen */
	426	imcb_log( ic, "WARNING: Received invalid Stream Initiation response, method %s", d->text );
	427
	428	return XT_HANDLED;
	429	}
	430
	431	/* Let's see if we can find out what this bytestream should be for... */
	432
	433	for( tflist = jd->filetransfers ; tflist; tflist = g_slist_next(tflist) )
	434	{
	435	struct jabber_transfer *tft = tflist->data;
[dce3903]	436	if( ( strcmp( tft->iq_id, iq_id ) == 0 ) )
[2ff2076]	437	{
	438	tf = tft;
	439	break;
	440	}
	441	}
	442
	443	if (!tf)
	444	{
	445	imcb_log( ic, "WARNING: Received bytestream request from %s that doesn't match an SI request", ini_jid );
	446	return XT_HANDLED;
	447	}
	448
	449	tf->ini_jid = g_strdup( ini_jid );
	450	tf->tgt_jid = g_strdup( tgt_jid );
	451
[dce3903]	452	imcb_log( ic, "File %s: %s accepted the transfer!", tf->ft->file_name, tgt_jid );
	453
[2ff2076]	454	jabber_bs_send_start( tf );
	455
	456	return XT_HANDLED;
	457	}
	458
	459	int jabber_si_send_request(struct im_connection ic, char who, struct jabber_transfer *tf )
	460	{
	461	struct xt_node node, sinode;
	462	struct jabber_buddy *bud;
	463
	464	/* who knows how many bits the future holds :) */
	465	char filesizestr[ 1 + ( int ) ( 0.301029995663981198f * sizeof( size_t ) * 8 ) ];
	466
	467	const char *methods[] =
	468	{
	469	XMLNS_BYTESTREAMS,
	470	//XMLNS_IBB,
	471	NULL
	472	};
	473	const char **m;
	474	char *s;
	475
	476	/* Maybe we should hash this? */
	477	tf->sid = g_strdup_printf( "BitlBeeJabberSID%d", tf->ft->local_id );
	478
[793cc25]	479	if( ( s = strchr( who, '=' ) ) && jabber_chat_by_jid( ic, s + 1 ) )
[2ff2076]	480	bud = jabber_buddy_by_ext_jid( ic, who, 0 );
	481	else
	482	bud = jabber_buddy_by_jid( ic, who, 0 );
	483
	484	/* start with the SI tag */
	485	sinode = xt_new_node( "si", NULL, NULL );
	486	xt_add_attr( sinode, "xmlns", XMLNS_SI );
	487	xt_add_attr( sinode, "profile", XMLNS_FILETRANSFER );
	488	xt_add_attr( sinode, "id", tf->sid );
	489
	490	/* if( mimetype )
	491	xt_add_attr( node, "mime-type", mimetype ); */
	492
	493	/* now the file tag */
	494	/* if( desc )
	495	node = xt_new_node( "desc", descr, NULL ); */
	496	node = xt_new_node( "range", NULL, NULL );
	497
	498	sprintf( filesizestr, "%zd", tf->ft->file_size );
	499	node = xt_new_node( "file", NULL, node );
	500	xt_add_attr( node, "xmlns", XMLNS_FILETRANSFER );
	501	xt_add_attr( node, "name", tf->ft->file_name );
	502	xt_add_attr( node, "size", filesizestr );
	503	/* if (hash)
	504	xt_add_attr( node, "hash", hash );
	505	if (date)
	506	xt_add_attr( node, "date", date ); */
	507
	508	xt_add_child( sinode, node );
	509
	510	/* and finally the feature tag */
	511	node = xt_new_node( "field", NULL, NULL );
	512	xt_add_attr( node, "var", "stream-method" );
	513	xt_add_attr( node, "type", "list-single" );
	514
	515	for ( m = methods ; *m ; m ++ )
	516	xt_add_child( node, xt_new_node( "option", NULL, xt_new_node( "value", (char )m, NULL ) ) );
	517
	518	node = xt_new_node( "x", NULL, node );
	519	xt_add_attr( node, "xmlns", XMLNS_XDATA );
	520	xt_add_attr( node, "type", "form" );
	521
	522	node = xt_new_node( "feature", NULL, node );
	523	xt_add_attr( node, "xmlns", XMLNS_FEATURE );
	524
	525	xt_add_child( sinode, node );
	526
	527	/* and we are there... */
	528	node = jabber_make_packet( "iq", "set", bud ? bud->full_jid : who, sinode );
	529	jabber_cache_add( ic, node, jabber_si_handle_response );
[dce3903]	530	tf->iq_id = g_strdup( xt_find_attr( node, "id" ) );
[2ff2076]	531
	532	return jabber_write_packet( ic, node );
	533	}

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