6080868487971e5b0b629f2a0e5980a3c9148c61
[asterisk/asterisk.git] / apps / app_bridgeaddchan.c
1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 2015, Digium, Inc.
5  *
6  * Alec Davis <sivad.a@paradise.net.nz>
7  *
8  * See http://www.asterisk.org for more information about
9  * the Asterisk project. Please do not directly contact
10  * any of the maintainers of this project for assistance;
11  * the project provides a web site, mailing lists and IRC
12  * channels for your use.
13  *
14  * This program is free software, distributed under the terms of
15  * the GNU General Public License Version 2. See the LICENSE file
16  * at the top of the source tree.
17  */
18
19 /*! \file
20  *
21  * \brief Application to place the channel into an existing Bridge
22  *
23  * \author Alec Davis
24  *
25  * \ingroup applications
26  */
27
28 /*** MODULEINFO
29         <support_level>core</support_level>
30  ***/
31
32 #include "asterisk.h"
33
34 #include "asterisk/file.h"
35 #include "asterisk/module.h"
36 #include "asterisk/channel.h"
37 #include "asterisk/bridge.h"
38 #include "asterisk/features.h"
39
40 /*** DOCUMENTATION
41         <application name="BridgeAdd" language="en_US">
42                 <synopsis>
43                         Join a bridge that contains the specified channel.
44                 </synopsis>
45                 <syntax>
46                         <parameter name="channel" required="true">
47                                 <para>The current channel joins the bridge containing the channel
48                                 identified by the channel name, channel name prefix, or channel
49                                 uniqueid.</para>
50                         </parameter>
51                 </syntax>
52                 <description>
53                         <para>This application places the incoming channel into
54                         the bridge containing the specified channel. The specified
55                         channel only needs to be the prefix of a full channel name
56                         IE. 'PJSIP/cisco0001'.
57                         </para>
58                         <para>This application sets the following channel variable upon completion:</para>
59                         <variablelist>
60                                 <variable name="BRIDGERESULT">
61                                         <para>The result of the bridge attempt as a text string.</para>
62                                         <value name="SUCCESS" />
63                                         <value name="FAILURE" />
64                                         <value name="LOOP" />
65                                         <value name="NONEXISTENT" />
66                                 </variable>
67                         </variablelist>
68                 </description>
69         </application>
70  ***/
71
72 static const char app[] = "BridgeAdd";
73
74 static int bridgeadd_exec(struct ast_channel *chan, const char *data)
75 {
76         struct ast_channel *c_ref;
77         struct ast_bridge_features chan_features;
78         struct ast_bridge *bridge;
79         char *c_name;
80         int failed;
81
82         /* Answer the channel if needed */
83         if (ast_channel_state(chan) != AST_STATE_UP) {
84                 ast_answer(chan);
85         }
86
87         if (ast_strlen_zero(data)) {
88                 data = "";
89                 c_ref = NULL;
90         } else {
91                 c_ref = ast_channel_get_by_name_prefix(data, strlen(data));
92         }
93         if (!c_ref) {
94                 ast_verb(4, "Channel '%s' not found\n", data);
95                 pbx_builtin_setvar_helper(chan, "BRIDGERESULT", "NONEXISTENT");
96                 return 0;
97         }
98         if (chan == c_ref) {
99                 ast_channel_unref(c_ref);
100                 pbx_builtin_setvar_helper(chan, "BRIDGERESULT", "LOOP");
101                 return 0;
102         }
103
104         c_name = ast_strdupa(ast_channel_name(c_ref));
105
106         ast_channel_lock(c_ref);
107         bridge = ast_channel_get_bridge(c_ref);
108         ast_channel_unlock(c_ref);
109
110         ast_channel_unref(c_ref);
111
112         if (!bridge) {
113                 ast_verb(4, "Channel '%s' is not in a bridge\n", c_name);
114                 pbx_builtin_setvar_helper(chan, "BRIDGERESULT", "FAILURE");
115                 return 0;
116         }
117
118         ast_verb(4, "%s is joining %s in bridge %s\n",
119                 ast_channel_name(chan), c_name, bridge->uniqueid);
120
121         failed = ast_bridge_features_init(&chan_features)
122                 || ast_bridge_join(bridge, chan, NULL, &chan_features, NULL, 0);
123         if (failed) {
124                 ast_verb(4, "%s failed to join %s in bridge %s\n",
125                         ast_channel_name(chan), c_name, bridge->uniqueid);
126         }
127
128         ast_bridge_features_cleanup(&chan_features);
129         ao2_cleanup(bridge);
130         pbx_builtin_setvar_helper(chan, "BRIDGERESULT", failed ? "FAILURE" : "SUCCESS");
131         return 0;
132 }
133
134 static int unload_module(void)
135 {
136         return ast_unregister_application(app);
137 }
138
139 static int load_module(void)
140 {
141         return ast_register_application_xml(app, bridgeadd_exec);
142 }
143
144 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Bridge Add Channel Application");