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source: protocols/jabber/presence.c @ 24b8bbb

Last change on this file since 24b8bbb was be609ff, checked in by Wilmer van der Gaast <wilmer@…>, at 2010-03-12T19:10:16Z
Merging mainline.
Property mode set to `100644`
File size: 8.3 KB

Line
1	/***************************************************************************\
2	* *
3	* BitlBee - An IRC to IM gateway *
4	* Jabber module - Handling of presence (tags), etc *
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
26	xt_status jabber_pkt_presence( struct xt_node *node, gpointer data )
27	{
28	struct im_connection *ic = data;
29	char *from = xt_find_attr( node, "from" );
30	char type = xt_find_attr( node, "type" ); / NULL should mean the person is online. */
31	struct xt_node c, cap;
32	struct jabber_buddy bud, send_presence = NULL;
33	int is_chat = 0;
34	char *s;
35
36	if( !from )
37	return XT_HANDLED;
38
39	if( ( s = strchr( from, '/' ) ) )
40	{
41	*s = 0;
42	if( jabber_chat_by_jid( ic, from ) )
43	is_chat = 1;
44	*s = '/';
45	}
46
47	if( type == NULL )
48	{
49	if( !( bud = jabber_buddy_by_jid( ic, from, GET_BUDDY_EXACT \| GET_BUDDY_CREAT ) ) )
50	{
51	/*
52	imcb_log( ic, "Warning: Could not handle presence information from JID: %s", from );
53	*/
54	return XT_HANDLED;
55	}
56
57	g_free( bud->away_message );
58	if( ( c = xt_find_node( node->children, "status" ) ) && c->text_len > 0 )
59	bud->away_message = g_strdup( c->text );
60	else
61	bud->away_message = NULL;
62
63	if( ( c = xt_find_node( node->children, "show" ) ) && c->text_len > 0 )
64	{
65	bud->away_state = (void*) jabber_away_state_by_code( c->text );
66	}
67	else
68	{
69	bud->away_state = NULL;
70	}
71
72	if( ( c = xt_find_node( node->children, "priority" ) ) && c->text_len > 0 )
73	bud->priority = atoi( c->text );
74	else
75	bud->priority = 0;
76
77	if( bud && ( cap = xt_find_node( node->children, "c" ) ) &&
78	( s = xt_find_attr( cap, "xmlns" ) ) && strcmp( s, XMLNS_CAPS ) == 0 )
79	{
80	/* This <presence> stanza includes an XEP-0115
81	capabilities part. Not too interesting, but we can
82	see if it has an ext= attribute. */
83	s = xt_find_attr( cap, "ext" );
84	if( s && ( strstr( s, "cstates" ) \|\| strstr( s, "chatstate" ) ) )
85	bud->flags \|= JBFLAG_DOES_XEP85;
86
87	/* This field can contain more information like xhtml
88	support, but we don't support that ourselves.
89	Officially the ext= tag was deprecated, but enough
90	clients do send it.
91
92	(I'm aware that this is not the right way to use
93	this field.) See for an explanation of ext=:
94	http://www.xmpp.org/extensions/attic/xep-0115-1.3.html*/
95	}
96
97	if( is_chat )
98	jabber_chat_pkt_presence( ic, bud, node );
99	else
100	send_presence = jabber_buddy_by_jid( ic, bud->bare_jid, 0 );
101	}
102	else if( strcmp( type, "unavailable" ) == 0 )
103	{
104	if( ( bud = jabber_buddy_by_jid( ic, from, 0 ) ) == NULL )
105	{
106	/*
107	imcb_log( ic, "Warning: Received presence information from unknown JID: %s", from );
108	*/
109	return XT_HANDLED;
110	}
111
112	/* Handle this before we delete the JID. */
113	if( is_chat )
114	{
115	jabber_chat_pkt_presence( ic, bud, node );
116	}
117
118	if( strchr( from, '/' ) == NULL )
119	/* Sometimes servers send a type="unavailable" from a
120	bare JID, which should mean that suddenly all
121	resources for this JID disappeared. */
122	jabber_buddy_remove_bare( ic, from );
123	else
124	jabber_buddy_remove( ic, from );
125
126	if( is_chat )
127	{
128	/* Nothing else to do for now? */
129	}
130	else if( ( s = strchr( from, '/' ) ) )
131	{
132	*s = 0;
133
134	/* If another resource is still available, send its presence
135	information. */
136	if( ( send_presence = jabber_buddy_by_jid( ic, from, 0 ) ) == NULL )
137	{
138	/* Otherwise, count him/her as offline now. */
139	imcb_buddy_status( ic, from, 0, NULL, NULL );
140	}
141
142	*s = '/';
143	}
144	else
145	{
146	imcb_buddy_status( ic, from, 0, NULL, NULL );
147	}
148	}
149	else if( strcmp( type, "subscribe" ) == 0 )
150	{
151	jabber_buddy_ask( ic, from );
152	}
153	else if( strcmp( type, "subscribed" ) == 0 )
154	{
155	/* Not sure about this one, actually... */
156	imcb_log( ic, "%s just accepted your authorization request", from );
157	}
158	else if( strcmp( type, "unsubscribe" ) == 0 \|\| strcmp( type, "unsubscribed" ) == 0 )
159	{
160	/* Do nothing here. Plenty of control freaks or over-curious
161	souls get excited when they can see who still has them in
162	their buddy list and who finally removed them. Somehow I
163	got the impression that those are the people who get
164	removed from many buddy lists for "some" reason...
165
166	If you're one of those people, this is your chance to write
167	your first line of code in C... */
168	}
169	else if( strcmp( type, "error" ) == 0 )
170	{
171	return jabber_cache_handle_packet( ic, node );
172
173	/*
174	struct jabber_error *err;
175	if( ( c = xt_find_node( node->children, "error" ) ) )
176	{
177	err = jabber_error_parse( c, XMLNS_STANZA_ERROR );
178	imcb_error( ic, "Stanza (%s) error: %s%s%s", node->name,
179	err->code, err->text ? ": " : "",
180	err->text ? err->text : "" );
181	jabber_error_free( err );
182	} */
183	}
184
185	if( send_presence )
186	{
187	int is_away = 0;
188
189	if( send_presence->away_state &&
190	strcmp( send_presence->away_state->code, "chat" ) != 0 )
191	is_away = OPT_AWAY;
192
193	imcb_buddy_status( ic, send_presence->bare_jid, OPT_LOGGED_IN \| is_away,
194	is_away ? send_presence->away_state->full_name : NULL,
195	send_presence->away_message );
196	}
197
198	return XT_HANDLED;
199	}
200
201	/* Whenever presence information is updated, call this function to inform the
202	server. */
203	int presence_send_update( struct im_connection *ic )
204	{
205	struct jabber_data *jd = ic->proto_data;
206	struct xt_node node, cap;
207	struct groupchat *c;
208	int st;
209
210	node = jabber_make_packet( "presence", NULL, NULL, NULL );
211	xt_add_child( node, xt_new_node( "priority", set_getstr( &ic->acc->set, "priority" ), NULL ) );
212	if( jd->away_state )
213	xt_add_child( node, xt_new_node( "show", jd->away_state->code, NULL ) );
214	if( jd->away_message )
215	xt_add_child( node, xt_new_node( "status", jd->away_message, NULL ) );
216
217	/* This makes the packet slightly bigger, but clients interested in
218	capabilities can now cache the discovery info. This reduces the
219	usual post-login iq-flood. See XEP-0115. At least libpurple and
220	Trillian seem to do this right. */
221	cap = xt_new_node( "c", NULL, NULL );
222	xt_add_attr( cap, "xmlns", XMLNS_CAPS );
223	xt_add_attr( cap, "node", "http://bitlbee.org/xmpp/caps" );
224	xt_add_attr( cap, "ver", BITLBEE_VERSION ); /* The XEP wants this hashed, but nobody's doing that. */
225	xt_add_child( node, cap );
226
227	st = jabber_write_packet( ic, node );
228
229	/* Have to send this update to all groupchats too, the server won't
230	do this automatically. */
231	for( c = ic->groupchats; c && st; c = c->next )
232	{
233	struct jabber_chat *jc = c->data;
234
235	xt_add_attr( node, "to", jc->my_full_jid );
236	st = jabber_write_packet( ic, node );
237	}
238
239	xt_free_node( node );
240	return st;
241	}
242
243	/* Send a subscribe/unsubscribe request to a buddy. */
244	int presence_send_request( struct im_connection ic, char handle, char *request )
245	{
246	struct xt_node *node;
247	int st;
248
249	node = jabber_make_packet( "presence", NULL, NULL, NULL );
250	xt_add_attr( node, "to", handle );
251	xt_add_attr( node, "type", request );
252
253	st = jabber_write_packet( ic, node );
254
255	xt_free_node( node );
256	return st;
257	}

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