Replace direct access to channel name with accessor functions
[asterisk/asterisk.git] / apps / app_flash.c
1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 1999 - 2005, Digium, Inc.
5  *
6  * Mark Spencer <markster@digium.com>
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 App to flash a DAHDI trunk
22  *
23  * \author Mark Spencer <markster@digium.com>
24  * 
25  * \ingroup applications
26  */
27  
28 /*** MODULEINFO
29         <depend>dahdi</depend>
30         <support_level>core</support_level>
31  ***/
32
33 #include "asterisk.h"
34
35 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
36
37 #include <dahdi/user.h>
38
39 #include "asterisk/lock.h"
40 #include "asterisk/file.h"
41 #include "asterisk/channel.h"
42 #include "asterisk/pbx.h"
43 #include "asterisk/module.h"
44 #include "asterisk/translate.h"
45 #include "asterisk/image.h"
46
47 /*** DOCUMENTATION
48         <application name="Flash" language="en_US">
49                 <synopsis>
50                         Flashes a DAHDI Trunk.
51                 </synopsis>
52                 <syntax />
53                 <description>
54                         <para>Performs a flash on a DAHDI trunk. This can be used to access features
55                         provided on an incoming analogue circuit such as conference and call waiting.
56                         Use with SendDTMF() to perform external transfers.</para>
57                 </description>
58                 <see-also>
59                         <ref type="application">SendDTMF</ref>
60                 </see-also>
61         </application>
62  ***/
63
64 static char *app = "Flash";
65
66 static inline int dahdi_wait_event(int fd)
67 {
68         /* Avoid the silly dahdi_waitevent which ignores a bunch of events */
69         int i,j=0;
70         i = DAHDI_IOMUX_SIGEVENT;
71         if (ioctl(fd, DAHDI_IOMUX, &i) == -1) return -1;
72         if (ioctl(fd, DAHDI_GETEVENT, &j) == -1) return -1;
73         return j;
74 }
75
76 static int flash_exec(struct ast_channel *chan, const char *data)
77 {
78         int res = -1;
79         int x;
80         struct dahdi_params dahdip;
81
82         if (strcasecmp(chan->tech->type, "DAHDI")) {
83                 ast_log(LOG_WARNING, "%s is not a DAHDI channel\n", ast_channel_name(chan));
84                 return -1;
85         }
86         
87         memset(&dahdip, 0, sizeof(dahdip));
88         res = ioctl(chan->fds[0], DAHDI_GET_PARAMS, &dahdip);
89         if (!res) {
90                 if (dahdip.sigtype & __DAHDI_SIG_FXS) {
91                         x = DAHDI_FLASH;
92                         res = ioctl(chan->fds[0], DAHDI_HOOK, &x);
93                         if (!res || (errno == EINPROGRESS)) {
94                                 if (res) {
95                                         /* Wait for the event to finish */
96                                         dahdi_wait_event(chan->fds[0]);
97                                 }
98                                 res = ast_safe_sleep(chan, 1000);
99                                 ast_verb(3, "Flashed channel %s\n", ast_channel_name(chan));
100                         } else
101                                 ast_log(LOG_WARNING, "Unable to flash channel %s: %s\n", ast_channel_name(chan), strerror(errno));
102                 } else
103                         ast_log(LOG_WARNING, "%s is not an FXO Channel\n", ast_channel_name(chan));
104         } else
105                 ast_log(LOG_WARNING, "Unable to get parameters of %s: %s\n", ast_channel_name(chan), strerror(errno));
106
107         return res;
108 }
109
110 static int unload_module(void)
111 {
112         return ast_unregister_application(app);
113 }
114
115 static int load_module(void)
116 {
117         return ast_register_application_xml(app, flash_exec);
118 }
119
120 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Flash channel application");
121