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(ast_channel_tech(chan)->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(ast_channel_fd(chan, 0), DAHDI_GET_PARAMS, &dahdip);
  89         if (!res) {
  90                 if (dahdip.sigtype & __DAHDI_SIG_FXS) {
  91                         x = DAHDI_FLASH;
  92                         res = ioctl(ast_channel_fd(chan, 0), DAHDI_HOOK, &x);
  93                         if (!res || (errno == EINPROGRESS)) {
  94                                 if (res) {
  95                                         /* Wait for the event to finish */
  96                                         dahdi_wait_event(ast_channel_fd(chan, 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