Sat Sep 16 05:47:40 2006

Asterisk developer's documentation


app_senddtmf.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 1999 - 2005, Digium, Inc.
00005  *
00006  * Mark Spencer <markster@digium.com>
00007  *
00008  * See http://www.asterisk.org for more information about
00009  * the Asterisk project. Please do not directly contact
00010  * any of the maintainers of this project for assistance;
00011  * the project provides a web site, mailing lists and IRC
00012  * channels for your use.
00013  *
00014  * This program is free software, distributed under the terms of
00015  * the GNU General Public License Version 2. See the LICENSE file
00016  * at the top of the source tree.
00017  */
00018 
00019 /*! \file
00020  *
00021  * \brief App to send DTMF digits
00022  * 
00023  * \ingroup applications
00024  */
00025  
00026 #include <stdlib.h>
00027 #include <stdio.h>
00028 #include <string.h>
00029 
00030 #include "asterisk.h"
00031 
00032 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 17283 $")
00033 
00034 #include "asterisk/lock.h"
00035 #include "asterisk/file.h"
00036 #include "asterisk/logger.h"
00037 #include "asterisk/channel.h"
00038 #include "asterisk/pbx.h"
00039 #include "asterisk/module.h"
00040 #include "asterisk/translate.h"
00041 #include "asterisk/options.h"
00042 #include "asterisk/utils.h"
00043 #include "asterisk/app.h"
00044 
00045 static char *tdesc = "Send DTMF digits Application";
00046 
00047 static char *app = "SendDTMF";
00048 
00049 static char *synopsis = "Sends arbitrary DTMF digits";
00050 
00051 static char *descrip = 
00052 " SendDTMF(digits[|timeout_ms]): Sends DTMF digits on a channel. \n"
00053 " Accepted digits: 0-9, *#abcd, w (.5s pause)\n"
00054 " The application will either pass the assigned digits or terminate if it\n"
00055 " encounters an error.\n";
00056 
00057 STANDARD_LOCAL_USER;
00058 
00059 LOCAL_USER_DECL;
00060 
00061 static int senddtmf_exec(struct ast_channel *chan, void *data)
00062 {
00063    int res = 0;
00064    struct localuser *u;
00065    char *digits = NULL, *to = NULL;
00066    int timeout = 250;
00067 
00068    if (ast_strlen_zero(data)) {
00069       ast_log(LOG_WARNING, "SendDTMF requires an argument (digits or *#aAbBcCdD)\n");
00070       return 0;
00071    }
00072 
00073    LOCAL_USER_ADD(u);
00074 
00075    digits = ast_strdupa(data);
00076    if (!digits) {
00077       ast_log(LOG_ERROR, "Out of Memory!\n");
00078       LOCAL_USER_REMOVE(u);
00079       return -1;
00080    }
00081 
00082    if ((to = strchr(digits,'|'))) {
00083       *to = '\0';
00084       to++;
00085       timeout = atoi(to);
00086    }
00087       
00088    if(timeout <= 0)
00089       timeout = 250;
00090 
00091    res = ast_dtmf_stream(chan,NULL,digits,timeout);
00092       
00093    LOCAL_USER_REMOVE(u);
00094 
00095    return res;
00096 }
00097 
00098 int unload_module(void)
00099 {
00100    int res;
00101 
00102    res = ast_unregister_application(app);
00103 
00104    STANDARD_HANGUP_LOCALUSERS;
00105 
00106    return res; 
00107 }
00108 
00109 int load_module(void)
00110 {
00111    return ast_register_application(app, senddtmf_exec, synopsis, descrip);
00112 }
00113 
00114 char *description(void)
00115 {
00116    return tdesc;
00117 }
00118 
00119 int usecount(void)
00120 {
00121    int res;
00122    STANDARD_USECOUNT(res);
00123    return res;
00124 }
00125 
00126 char *key()
00127 {
00128    return ASTERISK_GPL_KEY;
00129 }

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