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  ***/
  31
  32 #include "asterisk.h"
  33
  34 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  35
  36 #include <dahdi/user.h>
  37
  38 #include "asterisk/lock.h"
  39 #include "asterisk/file.h"
  40 #include "asterisk/channel.h"
  41 #include "asterisk/pbx.h"
  42 #include "asterisk/module.h"
  43 #include "asterisk/translate.h"
  44 #include "asterisk/image.h"
  45
  46 static char *app = "Flash";
  47
  48 static char *synopsis = "Flashes a DAHDI Trunk";
  49
  50 static char *descrip =
  51 "Performs a flash on a DAHDI trunk.  This can be used\n"
  52 "to access features provided on an incoming analogue circuit\n"
  53 "such as conference and call waiting. Use with SendDTMF() to\n"
  54 "perform external transfers\n";
  55
  56
  57 static inline int dahdi_wait_event(int fd)
  58 {
  59         /* Avoid the silly dahdi_waitevent which ignores a bunch of events */
  60         int i,j=0;
  61         i = DAHDI_IOMUX_SIGEVENT;
  62         if (ioctl(fd, DAHDI_IOMUX, &i) == -1) return -1;
  63         if (ioctl(fd, DAHDI_GETEVENT, &j) == -1) return -1;
  64         return j;
  65 }
  66
  67 static int flash_exec(struct ast_channel *chan, void *data)
  68 {
  69         int res = -1;
  70         int x;
  71         struct dahdi_params dahdip;
  72
  73         if (strcasecmp(chan->tech->type, "DAHDI")) {
  74                 ast_log(LOG_WARNING, "%s is not a DAHDI channel\n", chan->name);
  75                 return -1;
  76         }
  77
  78         memset(&dahdip, 0, sizeof(dahdip));
  79         res = ioctl(chan->fds[0], DAHDI_GET_PARAMS, &dahdip);
  80         if (!res) {
  81                 if (dahdip.sigtype & __DAHDI_SIG_FXS) {
  82                         x = DAHDI_FLASH;
  83                         res = ioctl(chan->fds[0], DAHDI_HOOK, &x);
  84                         if (!res || (errno == EINPROGRESS)) {
  85                                 if (res) {
  86                                         /* Wait for the event to finish */
  87                                         dahdi_wait_event(chan->fds[0]);
  88                                 }
  89                                 res = ast_safe_sleep(chan, 1000);
  90                                 ast_verb(3, "Flashed channel %s\n", chan->name);
  91                         } else
  92                                 ast_log(LOG_WARNING, "Unable to flash channel %s: %s\n", chan->name, strerror(errno));
  93                 } else
  94                         ast_log(LOG_WARNING, "%s is not an FXO Channel\n", chan->name);
  95         } else
  96                 ast_log(LOG_WARNING, "Unable to get parameters of %s: %s\n", chan->name, strerror(errno));
  97
  98         return res;
  99 }
 100
 101 static int unload_module(void)
 102 {
 103         return ast_unregister_application(app);
 104 }
 105
 106 static int load_module(void)
 107 {
 108         return ast_register_application(app, flash_exec, synopsis, descrip);
 109 }
 110
 111 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Flash channel application");
 112