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 zap trunk
  22  *
  23  * \author Mark Spencer <markster@digium.com>
  24  *
  25  * \ingroup applications
  26  */
  27
  28 /*** MODULEINFO
  29         <depend>zaptel</depend>
  30  ***/
  31
  32 #include "asterisk.h"
  33
  34 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  35
  36 #include <stdlib.h>
  37 #include <stdio.h>
  38 #include <string.h>
  39 #include <errno.h>
  40 #include <sys/ioctl.h>
  41 #include <zaptel/zaptel.h>
  42
  43 #include "asterisk/lock.h"
  44 #include "asterisk/file.h"
  45 #include "asterisk/logger.h"
  46 #include "asterisk/channel.h"
  47 #include "asterisk/pbx.h"
  48 #include "asterisk/module.h"
  49 #include "asterisk/translate.h"
  50 #include "asterisk/image.h"
  51 #include "asterisk/options.h"
  52
  53 static char *app = "Flash";
  54
  55 static char *synopsis = "Flashes a Zap Trunk";
  56
  57 static char *descrip =
  58 "Performs a flash on a zap trunk.  This can be used\n"
  59 "to access features provided on an incoming analogue circuit\n"
  60 "such as conference and call waiting. Use with SendDTMF() to\n"
  61 "perform external transfers\n";
  62
  63
  64 static inline int zt_wait_event(int fd)
  65 {
  66         /* Avoid the silly zt_waitevent which ignores a bunch of events */
  67         int i,j=0;
  68         i = ZT_IOMUX_SIGEVENT;
  69         if (ioctl(fd, ZT_IOMUX, &i) == -1) return -1;
  70         if (ioctl(fd, ZT_GETEVENT, &j) == -1) return -1;
  71         return j;
  72 }
  73
  74 static int flash_exec(struct ast_channel *chan, void *data)
  75 {
  76         int res = -1;
  77         int x;
  78         struct ast_module_user *u;
  79         struct zt_params ztp;
  80         u = ast_module_user_add(chan);
  81         if (!strcasecmp(chan->tech->type, "Zap")) {
  82                 memset(&ztp, 0, sizeof(ztp));
  83                 res = ioctl(chan->fds[0], ZT_GET_PARAMS, &ztp);
  84                 if (!res) {
  85                         if (ztp.sigtype & __ZT_SIG_FXS) {
  86                                 x = ZT_FLASH;
  87                                 res = ioctl(chan->fds[0], ZT_HOOK, &x);
  88                                 if (!res || (errno == EINPROGRESS)) {
  89                                         if (res) {
  90                                                 /* Wait for the event to finish */
  91                                                 zt_wait_event(chan->fds[0]);
  92                                         }
  93                                         res = ast_safe_sleep(chan, 1000);
  94                                         if (option_verbose > 2)
  95                                                 ast_verbose(VERBOSE_PREFIX_3 "Flashed channel %s\n", chan->name);
  96                                 } else
  97                                         ast_log(LOG_WARNING, "Unable to flash channel %s: %s\n", chan->name, strerror(errno));
  98                         } else
  99                                 ast_log(LOG_WARNING, "%s is not an FXO Channel\n", chan->name);
 100                 } else
 101                         ast_log(LOG_WARNING, "Unable to get parameters of %s: %s\n", chan->name, strerror(errno));
 102         } else
 103                 ast_log(LOG_WARNING, "%s is not a Zap channel\n", chan->name);
 104         ast_module_user_remove(u);
 105         return res;
 106 }
 107
 108 static int unload_module(void)
 109 {
 110         int res;
 111
 112         res = ast_unregister_application(app);
 113
 114         ast_module_user_hangup_all();
 115
 116         return res;
 117 }
 118
 119 static int load_module(void)
 120 {
 121         return ast_register_application(app, flash_exec, synopsis, descrip);
 122 }
 123
 124 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Flash channel application");
 125