289 lines
8.4 KiB
C
289 lines
8.4 KiB
C
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/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2007-2008, Trinity College Computing Center
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* Written by David Chappell <David.Chappell@trincoll.edu>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Trivial application to read an extension into a variable
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*
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* \author David Chappell <David.Chappell@trincoll.edu>
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*
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* \ingroup applications
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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#include "asterisk/file.h"
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#include "asterisk/pbx.h"
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#include "asterisk/app.h"
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#include "asterisk/module.h"
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#include "asterisk/indications.h"
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#include "asterisk/channel.h"
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/*** DOCUMENTATION
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<application name="ReadExten" language="en_US">
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<synopsis>
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Read an extension into a variable.
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</synopsis>
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<syntax>
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<parameter name="variable" required="true" />
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<parameter name="filename">
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<para>File to play before reading digits or tone with option <literal>i</literal></para>
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</parameter>
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<parameter name="context">
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<para>Context in which to match extensions.</para>
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</parameter>
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<parameter name="option">
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<optionlist>
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<option name="s">
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<para>Return immediately if the channel is not answered.</para>
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</option>
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<option name="i">
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<para>Play <replaceable>filename</replaceable> as an indication tone from your
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<filename>indications.conf</filename> or a directly specified list of
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frequencies and durations.</para>
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</option>
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<option name="n">
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<para>Read digits even if the channel is not answered.</para>
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</option>
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<option name="p">
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<para>The extension entered will be considered complete when a <literal>#</literal>
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is entered.</para>
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</option>
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</optionlist>
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</parameter>
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<parameter name="timeout">
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<para>An integer number of seconds to wait for a digit response. If
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greater than <literal>0</literal>, that value will override the default timeout.</para>
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</parameter>
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</syntax>
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<description>
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<para>Reads a <literal>#</literal> terminated string of digits from the user into the given variable.</para>
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<para>Will set READEXTENSTATUS on exit with one of the following statuses:</para>
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<variablelist>
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<variable name="READEXTENSTATUS">
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<value name="OK">
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A valid extension exists in ${variable}.
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</value>
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<value name="TIMEOUT">
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No extension was entered in the specified time. Also sets ${variable} to "t".
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</value>
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<value name="INVALID">
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An invalid extension, ${INVALID_EXTEN}, was entered. Also sets ${variable} to "i".
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</value>
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<value name="SKIP">
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Line was not up and the option 's' was specified.
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</value>
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<value name="ERROR">
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Invalid arguments were passed.
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</value>
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</variable>
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</variablelist>
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</description>
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</application>
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***/
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enum readexten_option_flags {
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OPT_SKIP = (1 << 0),
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OPT_INDICATION = (1 << 1),
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OPT_NOANSWER = (1 << 2),
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OPT_POUND_TO_END = (1 << 3),
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};
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AST_APP_OPTIONS(readexten_app_options, {
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AST_APP_OPTION('s', OPT_SKIP),
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AST_APP_OPTION('i', OPT_INDICATION),
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AST_APP_OPTION('n', OPT_NOANSWER),
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AST_APP_OPTION('p', OPT_POUND_TO_END),
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});
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static char *app = "ReadExten";
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static int readexten_exec(struct ast_channel *chan, const char *data)
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{
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int res = 0;
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char exten[256] = "";
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int maxdigits = sizeof(exten) - 1;
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int timeout = 0, digit_timeout = 0, x = 0;
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char *argcopy = NULL, *status = "";
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struct ast_tone_zone_sound *ts = NULL;
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struct ast_flags flags = {0};
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AST_DECLARE_APP_ARGS(arglist,
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AST_APP_ARG(variable);
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AST_APP_ARG(filename);
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AST_APP_ARG(context);
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AST_APP_ARG(options);
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AST_APP_ARG(timeout);
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);
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "ReadExten requires at least one argument\n");
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pbx_builtin_setvar_helper(chan, "READEXTENSTATUS", "ERROR");
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return 0;
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}
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argcopy = ast_strdupa(data);
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AST_STANDARD_APP_ARGS(arglist, argcopy);
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if (ast_strlen_zero(arglist.variable)) {
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ast_log(LOG_WARNING, "Usage: ReadExten(variable[,filename[,context[,options[,timeout]]]])\n");
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pbx_builtin_setvar_helper(chan, "READEXTENSTATUS", "ERROR");
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return 0;
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}
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if (ast_strlen_zero(arglist.filename)) {
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arglist.filename = NULL;
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}
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if (ast_strlen_zero(arglist.context)) {
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arglist.context = ast_strdupa(ast_channel_context(chan));
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}
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if (!ast_strlen_zero(arglist.options)) {
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ast_app_parse_options(readexten_app_options, &flags, NULL, arglist.options);
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}
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if (!ast_strlen_zero(arglist.timeout)) {
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timeout = atoi(arglist.timeout);
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if (timeout > 0)
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timeout *= 1000;
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}
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if (timeout <= 0)
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timeout = ast_channel_pbx(chan) ? ast_channel_pbx(chan)->rtimeoutms : 10000;
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digit_timeout = ast_channel_pbx(chan) ? ast_channel_pbx(chan)->dtimeoutms : 5000;
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if (ast_test_flag(&flags, OPT_INDICATION) && !ast_strlen_zero(arglist.filename)) {
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ts = ast_get_indication_tone(ast_channel_zone(chan), arglist.filename);
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}
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do {
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if (ast_channel_state(chan) != AST_STATE_UP) {
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if (ast_test_flag(&flags, OPT_SKIP)) {
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/* At the user's option, skip if the line is not up */
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pbx_builtin_setvar_helper(chan, arglist.variable, "");
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status = "SKIP";
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break;
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} else if (!ast_test_flag(&flags, OPT_NOANSWER)) {
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/* Otherwise answer unless we're supposed to read while on-hook */
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res = ast_answer(chan);
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}
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}
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if (res < 0) {
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status = "HANGUP";
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break;
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}
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ast_playtones_stop(chan);
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ast_stopstream(chan);
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if (ts && ts->data[0]) {
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res = ast_playtones_start(chan, 0, ts->data, 0);
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} else if (arglist.filename) {
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if (ast_test_flag(&flags, OPT_INDICATION) && ast_fileexists(arglist.filename, NULL, ast_channel_language(chan)) <= 0) {
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/*
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* We were asked to play an indication that did not exist in the config.
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* If no such file exists, play it as a tonelist. With any luck they won't
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* have a file named "350+440.ulaw"
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* (but honestly, who would do something so silly?)
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*/
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res = ast_playtones_start(chan, 0, arglist.filename, 0);
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} else {
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res = ast_streamfile(chan, arglist.filename, ast_channel_language(chan));
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}
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}
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for (x = 0; x < maxdigits; x++) {
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ast_debug(3, "extension so far: '%s', timeout: %d\n", exten, timeout);
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res = ast_waitfordigit(chan, timeout);
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ast_playtones_stop(chan);
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ast_stopstream(chan);
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timeout = digit_timeout;
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if (res < 1) { /* timeout expired or hangup */
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if (ast_check_hangup(chan)) {
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status = "HANGUP";
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} else if (x == 0) {
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pbx_builtin_setvar_helper(chan, arglist.variable, "t");
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status = "TIMEOUT";
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}
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break;
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}
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if (ast_test_flag(&flags, OPT_POUND_TO_END) && res == '#') {
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exten[x] = 0;
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break;
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}
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exten[x] = res;
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if (!ast_matchmore_extension(chan, arglist.context, exten, 1 /* priority */,
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S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, NULL))) {
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if (!ast_exists_extension(chan, arglist.context, exten, 1,
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S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, NULL))
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&& res == '#') {
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exten[x] = '\0';
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}
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break;
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}
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}
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if (!ast_strlen_zero(status))
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break;
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if (ast_exists_extension(chan, arglist.context, exten, 1,
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S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, NULL))) {
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ast_debug(3, "User entered valid extension '%s'\n", exten);
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pbx_builtin_setvar_helper(chan, arglist.variable, exten);
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status = "OK";
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} else {
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ast_debug(3, "User dialed invalid extension '%s' in context '%s' on %s\n", exten, arglist.context, ast_channel_name(chan));
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pbx_builtin_setvar_helper(chan, arglist.variable, "i");
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pbx_builtin_setvar_helper(chan, "INVALID_EXTEN", exten);
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status = "INVALID";
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}
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} while (0);
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if (ts) {
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ts = ast_tone_zone_sound_unref(ts);
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}
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pbx_builtin_setvar_helper(chan, "READEXTENSTATUS", status);
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return status[0] == 'H' ? -1 : 0;
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}
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static int unload_module(void)
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{
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int res = ast_unregister_application(app);
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return res;
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}
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static int load_module(void)
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{
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int res = ast_register_application_xml(app, readexten_exec);
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return res;
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Read and evaluate extension validity");
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