apps/app_senddtmf.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 send DTMF digits
  22  *
  23  * \author Mark Spencer <markster@digium.com>
  24  *
  25  * \ingroup applications
  26  */
  27
  28 #include "asterisk.h"
  29
  30 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  31
  32 #include <stdlib.h>
  33 #include <stdio.h>
  34 #include <string.h>
  35
  36 #include "asterisk/lock.h"
  37 #include "asterisk/file.h"
  38 #include "asterisk/logger.h"
  39 #include "asterisk/channel.h"
  40 #include "asterisk/pbx.h"
  41 #include "asterisk/module.h"
  42 #include "asterisk/translate.h"
  43 #include "asterisk/options.h"
  44 #include "asterisk/utils.h"
  45 #include "asterisk/app.h"
  46 #include "asterisk/manager.h"
  47
  48 static char *app = "SendDTMF";
  49
  50 static char *synopsis = "Sends arbitrary DTMF digits";
  51
  52 static char *descrip =
  53 " SendDTMF(digits[|timeout_ms]): Sends DTMF digits on a channel. \n"
  54 " Accepted digits: 0-9, *#abcd, w (.5s pause)\n"
  55 " The application will either pass the assigned digits or terminate if it\n"
  56 " encounters an error.\n";
  57
  58
  59 static int senddtmf_exec(struct ast_channel *chan, void *data)
  60 {
  61         int res = 0;
  62         struct ast_module_user *u;
  63         char *digits = NULL, *to = NULL;
  64         int timeout = 250;
  65
  66         if (ast_strlen_zero(data)) {
  67                 ast_log(LOG_WARNING, "SendDTMF requires an argument (digits or *#aAbBcCdD)\n");
  68                 return 0;
  69         }
  70
  71         u = ast_module_user_add(chan);
  72
  73         digits = ast_strdupa(data);
  74
  75         if ((to = strchr(digits,'|'))) {
  76                 *to = '\0';
  77                 to++;
  78                 timeout = atoi(to);
  79         }
  80
  81         if (timeout <= 0)
  82                 timeout = 250;
  83
  84         res = ast_dtmf_stream(chan,NULL,digits,timeout);
  85
  86         ast_module_user_remove(u);
  87
  88         return res;
  89 }
  90
  91 static char mandescr_playdtmf[] =
  92 "Description: Plays a dtmf digit on the specified channel.\n"
  93 "Variables: (all are required)\n"
  94 "       Channel: Channel name to send digit to\n"
  95 "       Digit: The dtmf digit to play\n";
  96
  97 static int manager_play_dtmf(struct mansession *s, const struct message *m)
  98 {
  99         const char *channel = astman_get_header(m, "Channel");
 100         const char *digit = astman_get_header(m, "Digit");
 101         struct ast_channel *chan = ast_get_channel_by_name_locked(channel);
 102
 103         if (!chan) {
 104                 astman_send_error(s, m, "Channel not specified");
 105                 return 0;
 106         }
 107         if (!digit) {
 108                 astman_send_error(s, m, "No digit specified");
 109                 ast_mutex_unlock(&chan->lock);
 110                 return 0;
 111         }
 112
 113         ast_senddigit(chan, *digit);
 114
 115         ast_mutex_unlock(&chan->lock);
 116         astman_send_ack(s, m, "DTMF successfully queued");
 117
 118         return 0;
 119 }
 120
 121 static int unload_module(void)
 122 {
 123         int res;
 124
 125         res = ast_unregister_application(app);
 126         res |= ast_manager_unregister("PlayDTMF");
 127
 128         ast_module_user_hangup_all();
 129
 130         return res;
 131 }
 132
 133 static int load_module(void)
 134 {
 135         int res;
 136
 137         res = ast_manager_register2( "PlayDTMF", EVENT_FLAG_CALL, manager_play_dtmf, "Play DTMF signal on a specific channel.", mandescr_playdtmf );
 138         res |= ast_register_application(app, senddtmf_exec, synopsis, descrip);
 139
 140         return res;
 141 }
 142
 143 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Send DTMF digits Application");