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
jabber_pkt_presence(struct xt_node * node,gpointer data)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
choose_priority(struct im_connection * ic)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 && jd->away_state->full_name != 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. */
presence_send_update(struct im_connection * ic)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. */
presence_send_request(struct im_connection * ic,char * handle,char * request)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 }
260