1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/**
* Purple is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#include "internal.h"
#include "debug.h"
#include "jingleinfo.h"
static void
jabber_google_stun_lookup_cb(GSList *hosts, gpointer data,
const char *error_message)
{
JabberStream *js = (JabberStream *) data;
if (error_message) {
purple_debug_error("jabber", "Google STUN lookup failed: %s\n",
error_message);
g_slist_free(hosts);
js->stun_query = NULL;
return;
}
if (hosts && g_slist_next(hosts)) {
struct sockaddr *addr = g_slist_next(hosts)->data;
char dst[INET6_ADDRSTRLEN];
int port;
if (addr->sa_family == AF_INET6) {
inet_ntop(addr->sa_family, &((struct sockaddr_in6 *) addr)->sin6_addr,
dst, sizeof(dst));
port = ntohs(((struct sockaddr_in6 *) addr)->sin6_port);
} else {
inet_ntop(addr->sa_family, &((struct sockaddr_in *) addr)->sin_addr,
dst, sizeof(dst));
port = ntohs(((struct sockaddr_in *) addr)->sin_port);
}
if (js->stun_ip)
g_free(js->stun_ip);
js->stun_ip = g_strdup(dst);
js->stun_port = port;
purple_debug_info("jabber", "set Google STUN IP/port address: "
"%s:%d\n", dst, port);
/* unmark ongoing query */
js->stun_query = NULL;
}
while (hosts != NULL) {
hosts = g_slist_delete_link(hosts, hosts);
/* Free the address */
g_free(hosts->data);
hosts = g_slist_delete_link(hosts, hosts);
}
}
static void
jabber_google_jingle_info_common(JabberStream *js, const char *from,
JabberIqType type, xmlnode *query)
{
const xmlnode *stun = xmlnode_get_child(query, "stun");
const xmlnode *relay = xmlnode_get_child(query, "relay");
gchar *my_bare_jid;
/*
* Make sure that random people aren't sending us STUN servers. Per
* http://code.google.com/apis/talk/jep_extensions/jingleinfo.html, these
* stanzas are stamped from our bare JID.
*/
if (from) {
my_bare_jid = g_strdup_printf("%s@%s", js->user->node, js->user->domain);
if (!purple_strequal(from, my_bare_jid)) {
purple_debug_warning("jabber", "got google:jingleinfo with invalid from (%s)\n",
from);
g_free(my_bare_jid);
return;
}
g_free(my_bare_jid);
}
if (type == JABBER_IQ_ERROR || type == JABBER_IQ_GET)
return;
purple_debug_info("jabber", "got google:jingleinfo\n");
if (stun) {
xmlnode *server = xmlnode_get_child(stun, "server");
if (server) {
const gchar *host = xmlnode_get_attrib(server, "host");
const gchar *udp = xmlnode_get_attrib(server, "udp");
if (host && udp) {
PurpleAccount *account;
int port = atoi(udp);
/* if there, would already be an ongoing query,
cancel it */
if (js->stun_query)
purple_dnsquery_destroy(js->stun_query);
account = purple_connection_get_account(js->gc);
js->stun_query = purple_dnsquery_a_account(account, host, port,
jabber_google_stun_lookup_cb, js);
}
}
}
if (relay) {
xmlnode *token = xmlnode_get_child(relay, "token");
xmlnode *server = xmlnode_get_child(relay, "server");
if (token) {
gchar *relay_token = xmlnode_get_data(token);
/* we let js own the string returned from xmlnode_get_data */
js->google_relay_token = relay_token;
}
if (server) {
js->google_relay_host =
g_strdup(xmlnode_get_attrib(server, "host"));
}
}
}
static void
jabber_google_jingle_info_cb(JabberStream *js, const char *from,
JabberIqType type, const char *id,
xmlnode *packet, gpointer data)
{
xmlnode *query = xmlnode_get_child_with_namespace(packet, "query",
NS_GOOGLE_JINGLE_INFO);
if (query)
jabber_google_jingle_info_common(js, from, type, query);
else
purple_debug_warning("jabber", "Got invalid google:jingleinfo\n");
}
void
jabber_google_handle_jingle_info(JabberStream *js, const char *from,
JabberIqType type, const char *id,
xmlnode *child)
{
jabber_google_jingle_info_common(js, from, type, child);
}
void
jabber_google_send_jingle_info(JabberStream *js)
{
JabberIq *jingle_info =
jabber_iq_new_query(js, JABBER_IQ_GET, NS_GOOGLE_JINGLE_INFO);
jabber_iq_set_callback(jingle_info, jabber_google_jingle_info_cb,
NULL);
purple_debug_info("jabber", "sending google:jingleinfo query\n");
jabber_iq_send(jingle_info);
}
|
