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source: protocols/jabber/presence.c @ 2b0c05c

Last change on this file since 2b0c05c was 24f113b, checked in by dequis <dx@…>, at 2015-05-28T04:04:54Z

Lowering xmpp presence priority on away.

When user set's away lower xmpp presence priority by 5 as most clients do, new
priority won't go below zero though.

Property mode set to 100644

File size: 8.6 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
40	if ((s = strchr(from, '/'))) {
41	*s = 0;
42	if (jabber_chat_by_jid(ic, from)) {
43	is_chat = 1;
44	}
45	*s = '/';
46	}
47
48	if (type == NULL) {
49	if (!(bud = jabber_buddy_by_jid(ic, from, GET_BUDDY_EXACT \| GET_BUDDY_CREAT))) {
50	/*
51	imcb_log( ic, "Warning: Could not handle presence information from JID: %s", from );
52	*/
53	return XT_HANDLED;
54	}
55
56	g_free(bud->away_message);
57	if ((c = xt_find_node(node->children, "status")) && c->text_len > 0) {
58	bud->away_message = g_strdup(c->text);
59	} else {
60	bud->away_message = NULL;
61	}
62
63	if ((c = xt_find_node(node->children, "show")) && c->text_len > 0) {
64	bud->away_state = (void *) jabber_away_state_by_code(c->text);
65	} else {
66	bud->away_state = NULL;
67	}
68
69	if ((c = xt_find_node(node->children, "priority")) && c->text_len > 0) {
70	bud->priority = atoi(c->text);
71	} else {
72	bud->priority = 0;
73	}
74
75	if (bud && (cap = xt_find_node(node->children, "c")) &&
76	(s = xt_find_attr(cap, "xmlns")) && strcmp(s, XMLNS_CAPS) == 0) {
77	/* This <presence> stanza includes an XEP-0115
78	capabilities part. Not too interesting, but we can
79	see if it has an ext= attribute. */
80	s = xt_find_attr(cap, "ext");
81	if (s && (strstr(s, "cstates") \|\| strstr(s, "chatstate"))) {
82	bud->flags \|= JBFLAG_DOES_XEP85;
83	}
84
85	/* This field can contain more information like xhtml
86	support, but we don't support that ourselves.
87	Officially the ext= tag was deprecated, but enough
88	clients do send it.
89
90	(I'm aware that this is not the right way to use
91	this field.) See for an explanation of ext=:
92	http://www.xmpp.org/extensions/attic/xep-0115-1.3.html*/
93	}
94
95	if (is_chat) {
96	jabber_chat_pkt_presence(ic, bud, node);
97	} else {
98	send_presence = jabber_buddy_by_jid(ic, bud->bare_jid, 0);
99	}
100	} else if (strcmp(type, "unavailable") == 0) {
101	if ((bud = jabber_buddy_by_jid(ic, from, 0)) == NULL) {
102	/*
103	imcb_log( ic, "Warning: Received presence information from unknown JID: %s", from );
104	*/
105	return XT_HANDLED;
106	}
107
108	/* Handle this before we delete the JID. */
109	if (is_chat) {
110	jabber_chat_pkt_presence(ic, bud, node);
111	}
112
113	if (strchr(from, '/') == NULL) {
114	/* Sometimes servers send a type="unavailable" from a
115	bare JID, which should mean that suddenly all
116	resources for this JID disappeared. */
117	jabber_buddy_remove_bare(ic, from);
118	} else {
119	jabber_buddy_remove(ic, from);
120	}
121
122	if (is_chat) {
123	/* Nothing else to do for now? */
124	} else if ((s = strchr(from, '/'))) {
125	*s = 0;
126
127	/* If another resource is still available, send its presence
128	information. */
129	if ((send_presence = jabber_buddy_by_jid(ic, from, 0)) == NULL) {
130	/* Otherwise, count him/her as offline now. */
131	imcb_buddy_status(ic, from, 0, NULL, NULL);
132	}
133
134	*s = '/';
135	} else {
136	imcb_buddy_status(ic, from, 0, NULL, NULL);
137	}
138	} else if (strcmp(type, "subscribe") == 0) {
139	jabber_buddy_ask(ic, from);
140	} else if (strcmp(type, "subscribed") == 0) {
141	/* Not sure about this one, actually... */
142	imcb_log(ic, "%s just accepted your authorization request", from);
143	} else if (strcmp(type, "unsubscribe") == 0 \|\| strcmp(type, "unsubscribed") == 0) {
144	/* Do nothing here. Plenty of control freaks or over-curious
145	souls get excited when they can see who still has them in
146	their buddy list and who finally removed them. Somehow I
147	got the impression that those are the people who get
148	removed from many buddy lists for "some" reason...
149
150	If you're one of those people, this is your chance to write
151	your first line of code in C... */
152	} else if (strcmp(type, "error") == 0) {
153	return jabber_cache_handle_packet(ic, node);
154
155	/*
156	struct jabber_error *err;
157	if( ( c = xt_find_node( node->children, "error" ) ) )
158	{
159	err = jabber_error_parse( c, XMLNS_STANZA_ERROR );
160	imcb_error( ic, "Stanza (%s) error: %s%s%s", node->name,
161	err->code, err->text ? ": " : "",
162	err->text ? err->text : "" );
163	jabber_error_free( err );
164	} */
165	}
166
167	if (send_presence) {
168	int is_away = 0;
169
170	if (send_presence->away_state &&
171	strcmp(send_presence->away_state->code, "chat") != 0) {
172	is_away = OPT_AWAY;
173	}
174
175	imcb_buddy_status(ic, send_presence->bare_jid, OPT_LOGGED_IN \| is_away,
176	is_away ? send_presence->away_state->full_name : NULL,
177	send_presence->away_message);
178	}
179
180	return XT_HANDLED;
181	}
182
183	static char choose_priority(struct im_connection ic)
184	{
185	struct jabber_data *jd = ic->proto_data;
186	char *prio = set_getstr(&ic->acc->set, "priority");
187
188	if (jd->away_state->code != NULL) {
189	int new_prio = (atoi(prio) - 5);
190	if (new_prio < 0) {
191	new_prio = 0;
192	}
193	return g_strdup_printf("%d", new_prio);
194	}
195
196	return g_strdup(prio);
197	}
198
199	/* Whenever presence information is updated, call this function to inform the
200	server. */
201	int presence_send_update(struct im_connection *ic)
202	{
203	struct jabber_data *jd = ic->proto_data;
204	struct xt_node node, cap;
205	GSList *l;
206	int st;
207	char *prio = choose_priority(ic);
208
209	node = jabber_make_packet("presence", NULL, NULL, NULL);
210	xt_add_child(node, xt_new_node("priority", prio, NULL));
211	if (jd->away_state) {
212	xt_add_child(node, xt_new_node("show", jd->away_state->code, NULL));
213	}
214	if (jd->away_message) {
215	xt_add_child(node, xt_new_node("status", jd->away_message, NULL));
216	}
217
218	/* This makes the packet slightly bigger, but clients interested in
219	capabilities can now cache the discovery info. This reduces the
220	usual post-login iq-flood. See XEP-0115. At least libpurple and
221	Trillian seem to do this right. */
222	cap = xt_new_node("c", NULL, NULL);
223	xt_add_attr(cap, "xmlns", XMLNS_CAPS);
224	xt_add_attr(cap, "node", "http://bitlbee.org/xmpp/caps");
225	xt_add_attr(cap, "ver", BITLBEE_VERSION); /* The XEP wants this hashed, but nobody's doing that. */
226	xt_add_child(node, cap);
227
228	st = jabber_write_packet(ic, node);
229
230	/* Have to send this update to all groupchats too, the server won't
231	do this automatically. */
232	for (l = ic->groupchats; l && st; l = l->next) {
233	struct groupchat *c = l->data;
234	struct jabber_chat *jc = c->data;
235
236	xt_add_attr(node, "to", jc->my_full_jid);
237	st = jabber_write_packet(ic, node);
238	}
239
240	xt_free_node(node);
241	g_free(prio);
242	return st;
243	}
244
245	/* Send a subscribe/unsubscribe request to a buddy. */
246	int presence_send_request(struct im_connection ic, char handle, char *request)
247	{
248	struct xt_node *node;
249	int st;
250
251	node = jabber_make_packet("presence", NULL, NULL, NULL);
252	xt_add_attr(node, "to", handle);
253	xt_add_attr(node, "type", request);
254
255	st = jabber_write_packet(ic, node);
256
257	xt_free_node(node);
258	return st;
259	}

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