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149 lines
3.5 KiB
C
149 lines
3.5 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2007, Digium, Inc.
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*
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* Modified from func_devstate.c by Russell Bryant <russell@digium.com>
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* Adam Gundy <adam@starsilk.net>
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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 Get the state of a hinted extension for dialplan control
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*
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* \author Adam Gundy <adam@starsilk.net>
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*
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* \ingroup functions
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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/module.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/utils.h"
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#include "asterisk/devicestate.h"
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/*** DOCUMENTATION
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<function name="EXTENSION_STATE" language="en_US">
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<synopsis>
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Get an extension's state.
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</synopsis>
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<syntax argsep="@">
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<parameter name="extension" required="true" />
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<parameter name="context">
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<para>If it is not specified defaults to <literal>default</literal>.</para>
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</parameter>
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</syntax>
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<description>
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<para>The EXTENSION_STATE function can be used to retrieve the state from any
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hinted extension. For example:</para>
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<para>NoOp(1234@default has state ${EXTENSION_STATE(1234)})</para>
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<para>NoOp(4567@home has state ${EXTENSION_STATE(4567@home)})</para>
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<para>The possible values returned by this function are:</para>
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<para>UNKNOWN | NOT_INUSE | INUSE | BUSY | INVALID | UNAVAILABLE | RINGING |
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RINGINUSE | HOLDINUSE | ONHOLD</para>
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</description>
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</function>
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***/
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static const char *ast_extstate_str(int state)
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{
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const char *res = "UNKNOWN";
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switch (state) {
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case AST_EXTENSION_NOT_INUSE:
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res = "NOT_INUSE";
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break;
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case AST_EXTENSION_INUSE:
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res = "INUSE";
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break;
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case AST_EXTENSION_BUSY:
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res = "BUSY";
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break;
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case AST_EXTENSION_UNAVAILABLE:
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res = "UNAVAILABLE";
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break;
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case AST_EXTENSION_RINGING:
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res = "RINGING";
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break;
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case AST_EXTENSION_INUSE | AST_EXTENSION_RINGING:
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res = "RINGINUSE";
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break;
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case AST_EXTENSION_INUSE | AST_EXTENSION_ONHOLD:
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res = "HOLDINUSE";
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break;
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case AST_EXTENSION_ONHOLD:
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res = "ONHOLD";
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break;
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}
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return res;
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}
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static int extstate_read(struct ast_channel *chan, const char *cmd, char *data,
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char *buf, size_t len)
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{
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char *exten, *context;
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "EXTENSION_STATE requires an extension\n");
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return -1;
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}
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context = exten = data;
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strsep(&context, "@");
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if (ast_strlen_zero(context))
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context = "default";
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if (ast_strlen_zero(exten)) {
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ast_log(LOG_WARNING, "EXTENSION_STATE requires an extension\n");
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return -1;
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}
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ast_copy_string(buf,
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ast_extstate_str(ast_extension_state(chan, context, exten)), len);
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return 0;
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}
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static struct ast_custom_function extstate_function = {
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.name = "EXTENSION_STATE",
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.read = extstate_read,
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.read_max = 12,
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};
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static int unload_module(void)
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{
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int res;
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res = ast_custom_function_unregister(&extstate_function);
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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;
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res = ast_custom_function_register(&extstate_function);
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return res ? AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS;
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Gets an extension's state in the dialplan");
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