2003-03-16 06:00:11 +00:00
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/*
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2005-11-06 15:09:47 +00:00
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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* James Golovich <james@gnuinter.net>
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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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2005-09-14 20:46:50 +00:00
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2005-10-24 20:12:06 +00:00
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/*! \file
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2005-12-30 21:18:06 +00:00
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*
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* \brief Check if Channel is Available
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*
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* \author Mark Spencer <markster@digium.com>
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* \author James Golovich <james@gnuinter.net>
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2005-11-06 15:09:47 +00:00
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* \ingroup applications
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2003-03-16 06:00:11 +00:00
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*/
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2006-06-07 18:54:56 +00:00
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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2005-06-06 22:39:32 +00:00
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#include <stdlib.h>
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2005-11-08 04:48:00 +00:00
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#include <stdio.h>
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#include <string.h>
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2005-06-06 22:39:32 +00:00
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#include <unistd.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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2005-04-21 06:02:45 +00:00
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#include "asterisk/lock.h"
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#include "asterisk/file.h"
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#include "asterisk/logger.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/app.h"
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2005-07-08 21:14:34 +00:00
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#include "asterisk/devicestate.h"
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2005-11-06 18:11:13 +00:00
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#include "asterisk/options.h"
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2003-03-16 06:00:11 +00:00
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static char *app = "ChanIsAvail";
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2005-11-10 21:39:01 +00:00
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static char *synopsis = "Check channel availability";
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2003-03-16 06:00:11 +00:00
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static char *descrip =
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2007-07-31 01:10:47 +00:00
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" ChanIsAvail(Technology/resource[&Technology2/resource2...][,options]): \n"
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2005-11-10 20:56:45 +00:00
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"This application will check to see if any of the specified channels are\n"
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"available. The following variables will be set by this application:\n"
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" ${AVAILCHAN} - the name of the available channel, if one exists\n"
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" ${AVAILORIGCHAN} - the canonical channel name that was used to create the channel\n"
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" ${AVAILSTATUS} - the status code for the available channel\n"
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" Options:\n"
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" s - Consider the channel unavailable if the channel is in use at all\n"
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2007-01-24 20:35:54 +00:00
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" t - Simply checks if specified channels exist in the channel list\n"
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2007-06-12 15:58:28 +00:00
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" (implies option s) \n";
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2003-03-16 06:00:11 +00:00
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static int chanavail_exec(struct ast_channel *chan, void *data)
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{
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2007-06-12 15:58:28 +00:00
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int res=-1, inuse=-1, option_state=0, string_compare=0;
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2004-10-26 22:25:43 +00:00
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int status;
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2005-11-30 20:15:36 +00:00
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char *info, tmp[512], trychan[512], *peers, *tech, *number, *rest, *cur;
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2003-03-16 06:00:11 +00:00
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struct ast_channel *tempchan;
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2005-11-30 20:15:36 +00:00
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AST_DECLARE_APP_ARGS(args,
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AST_APP_ARG(reqchans);
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AST_APP_ARG(options);
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);
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2003-03-16 06:00:11 +00:00
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2005-10-26 19:48:14 +00:00
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if (ast_strlen_zero(data)) {
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2003-03-16 06:00:11 +00:00
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ast_log(LOG_WARNING, "ChanIsAvail requires an argument (Zap/1&Zap/2)\n");
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return -1;
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}
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2005-10-19 18:19:02 +00:00
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info = ast_strdupa(data);
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2005-11-30 20:15:36 +00:00
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AST_STANDARD_APP_ARGS(args, info);
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if (args.options) {
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if (strchr(args.options, 's'))
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2005-11-06 18:11:13 +00:00
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option_state = 1;
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2007-01-24 20:35:54 +00:00
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if (strchr(args.options, 't'))
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string_compare = 1;
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2005-11-06 18:11:13 +00:00
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}
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2005-11-30 20:15:36 +00:00
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peers = args.reqchans;
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2003-03-16 06:00:11 +00:00
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if (peers) {
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cur = peers;
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do {
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/* remember where to start next time */
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rest = strchr(cur, '&');
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if (rest) {
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*rest = 0;
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rest++;
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}
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tech = cur;
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number = strchr(tech, '/');
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if (!number) {
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2004-02-29 18:30:48 +00:00
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ast_log(LOG_WARNING, "ChanIsAvail argument takes format ([technology]/[device])\n");
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return -1;
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2003-03-16 06:00:11 +00:00
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}
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*number = '\0';
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number++;
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2004-11-15 16:27:28 +00:00
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2007-01-24 20:35:54 +00:00
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if (string_compare) {
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/* ast_parse_device_state checks for "SIP/1234" as a channel name.
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ast_device_state will ask the SIP driver for the channel state. */
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snprintf(trychan, sizeof(trychan), "%s/%s",cur,number);
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status = inuse = ast_parse_device_state(trychan);
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} else if (option_state) {
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2004-11-15 16:27:28 +00:00
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/* If the pbx says in use then don't bother trying further.
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This is to permit testing if someone's on a call, even if the
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channel can permit more calls (ie callwaiting, sip calls, etc). */
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snprintf(trychan, sizeof(trychan), "%s/%s",cur,number);
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status = inuse = ast_device_state(trychan);
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}
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2005-10-18 03:29:12 +00:00
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if ((inuse <= 1) && (tempchan = ast_request(tech, chan->nativeformats, number, &status))) {
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2003-03-18 17:03:33 +00:00
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pbx_builtin_setvar_helper(chan, "AVAILCHAN", tempchan->name);
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2004-06-05 18:42:59 +00:00
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/* Store the originally used channel too */
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2004-06-06 17:36:57 +00:00
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snprintf(tmp, sizeof(tmp), "%s/%s", tech, number);
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pbx_builtin_setvar_helper(chan, "AVAILORIGCHAN", tmp);
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2004-10-26 22:25:43 +00:00
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snprintf(tmp, sizeof(tmp), "%d", status);
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pbx_builtin_setvar_helper(chan, "AVAILSTATUS", tmp);
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2003-03-16 06:00:11 +00:00
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ast_hangup(tempchan);
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tempchan = NULL;
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res = 1;
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break;
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2004-10-26 22:25:43 +00:00
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} else {
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snprintf(tmp, sizeof(tmp), "%d", status);
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pbx_builtin_setvar_helper(chan, "AVAILSTATUS", tmp);
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2003-03-16 06:00:11 +00:00
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}
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cur = rest;
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} while (cur);
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}
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if (res < 1) {
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2003-03-18 17:03:33 +00:00
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pbx_builtin_setvar_helper(chan, "AVAILCHAN", "");
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2004-06-05 18:42:59 +00:00
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pbx_builtin_setvar_helper(chan, "AVAILORIGCHAN", "");
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2003-03-16 06:00:11 +00:00
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}
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return 0;
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}
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2006-08-21 02:11:39 +00:00
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static int unload_module(void)
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2003-03-16 06:00:11 +00:00
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{
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2007-07-16 13:35:20 +00:00
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return ast_unregister_application(app);
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2003-03-16 06:00:11 +00:00
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}
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2006-08-21 02:11:39 +00:00
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static int load_module(void)
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2003-03-16 06:00:11 +00:00
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{
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return ast_register_application(app, chanavail_exec, synopsis, descrip);
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}
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2006-08-21 02:11:39 +00:00
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Check channel availability");
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