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- /*
- * Asterisk -- An open source telephony toolkit.
- *
- * Copyright (C) 2007, Digium, Inc.
- *
- * Modified from func_devstate.c by Russell Bryant <russell@digium.com>
- * Adam Gundy <adam@starsilk.net>
- * See http://www.asterisk.org for more information about
- * the Asterisk project. Please do not directly contact
- * any of the maintainers of this project for assistance;
- * the project provides a web site, mailing lists and IRC
- * channels for your use.
- *
- * This program is free software, distributed under the terms of
- * the GNU General Public License Version 2. See the LICENSE file
- * at the top of the source tree.
- */
- /*! \file
- *
- * \brief Get the state of a hinted extension for dialplan control
- *
- * \author Adam Gundy <adam@starsilk.net>
- *
- * \ingroup functions
- */
- #include "asterisk.h"
- ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
- #include "asterisk/module.h"
- #include "asterisk/channel.h"
- #include "asterisk/pbx.h"
- #include "asterisk/utils.h"
- #include "asterisk/devicestate.h"
- static const char *ast_extstate_str(int state)
- {
- const char *res = "UNKNOWN";
- switch (state) {
- case AST_EXTENSION_NOT_INUSE:
- res = "NOT_INUSE";
- break;
- case AST_EXTENSION_INUSE:
- res = "INUSE";
- break;
- case AST_EXTENSION_BUSY:
- res = "BUSY";
- break;
- case AST_EXTENSION_UNAVAILABLE:
- res = "UNAVAILABLE";
- break;
- case AST_EXTENSION_RINGING:
- res = "RINGING";
- break;
- case AST_EXTENSION_INUSE | AST_EXTENSION_RINGING:
- res = "RINGINUSE";
- break;
- case AST_EXTENSION_INUSE | AST_EXTENSION_ONHOLD:
- res = "HOLDINUSE";
- break;
- case AST_EXTENSION_ONHOLD:
- res = "ONHOLD";
- break;
- }
- return res;
- }
- static int extstate_read(struct ast_channel *chan, const char *cmd, char *data,
- char *buf, size_t len)
- {
- char *exten, *context;
- if (ast_strlen_zero(data)) {
- ast_log(LOG_WARNING, "EXTENSION_STATE requires an extension\n");
- return -1;
- }
- context = exten = data;
- strsep(&context, "@");
- if (ast_strlen_zero(context))
- context = "default";
- if (ast_strlen_zero(exten)) {
- ast_log(LOG_WARNING, "EXTENSION_STATE requires an extension\n");
- return -1;
- }
- ast_copy_string(buf,
- ast_extstate_str(ast_extension_state(chan, context, exten)), len);
- return 0;
- }
- static struct ast_custom_function extstate_function = {
- .name = "EXTENSION_STATE",
- .synopsis = "Get an extension's state",
- .syntax = "EXTENSION_STATE(extension[@context])",
- .desc =
- " The EXTENSION_STATE function can be used to retrieve the state from any\n"
- "hinted extension. For example:\n"
- " NoOp(1234@default has state ${EXTENSION_STATE(1234)})\n"
- " NoOp(4567@home has state ${EXTENSION_STATE(4567@home)})\n"
- "\n"
- " The possible values returned by this function are:\n"
- "UNKNOWN | NOT_INUSE | INUSE | BUSY | INVALID | UNAVAILABLE | RINGING\n"
- "RINGINUSE | HOLDINUSE | ONHOLD\n",
- .read = extstate_read,
- };
- static int unload_module(void)
- {
- int res;
- res = ast_custom_function_unregister(&extstate_function);
- return res;
- }
- static int load_module(void)
- {
- int res;
- res = ast_custom_function_register(&extstate_function);
- return res ? AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS;
- }
- AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Gets an extension's state in the dialplan");
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