2003-03-16 06:00:11 +00:00
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/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* Check if Channel is Available
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*
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2005-01-21 07:06:25 +00:00
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* Copyright (C) 2003 - 2005, Digium, Inc.
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2003-03-16 06:00:11 +00:00
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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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* This program is free software, distributed under the terms of
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* the GNU General Public License
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*
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*/
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2005-06-06 22:39:32 +00:00
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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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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2003-03-16 06:00:11 +00:00
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static char *tdesc = "Check if channel is available";
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static char *app = "ChanIsAvail";
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static char *synopsis = "Check if channel is available";
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static char *descrip =
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2004-11-15 16:27:28 +00:00
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" ChanIsAvail(Technology/resource[&Technology2/resource2...][|option]): \n"
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2003-03-16 06:00:11 +00:00
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"Checks is any of the requested channels are available. If none\n"
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2004-03-02 17:49:33 +00:00
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"of the requested channels are available the new priority will be\n"
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"n+101 (unless such a priority does not exist or on error, in which\n"
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2004-12-28 23:58:12 +00:00
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"case ChanIsAvail will return -1).\n"
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"If any of the requested channels are available, the next priority will be n+1,\n"
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"the channel variable ${AVAILCHAN} will be set to the name of the available channel\n"
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"and the ChanIsAvail app will return 0.\n"
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"${AVAILORIGCHAN} is the canonical channel name that was used to create the channel.\n"
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"${AVAILSTATUS} is the status code for the channel.\n"
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2004-11-15 16:27:28 +00:00
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"If the option 's' is specified (state), will consider channel unavailable\n"
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"when the channel is in use at all, even if it can take another call.\n";
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2003-03-16 06:00:11 +00:00
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STANDARD_LOCAL_USER;
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LOCAL_USER_DECL;
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static int chanavail_exec(struct ast_channel *chan, void *data)
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{
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2004-11-15 16:27:28 +00:00
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int res=-1, inuse=-1, option_state=0;
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2004-10-26 22:25:43 +00:00
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int status;
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2003-03-16 06:00:11 +00:00
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struct localuser *u;
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2004-11-15 16:27:28 +00:00
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char info[512], tmp[512], trychan[512], *peers, *tech, *number, *rest, *cur, *options, *stringp;
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2003-03-16 06:00:11 +00:00
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struct ast_channel *tempchan;
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if (!data) {
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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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LOCAL_USER_ADD(u);
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2004-03-02 17:49:33 +00:00
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strncpy(info, (char *)data, sizeof(info)-1);
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2004-11-15 16:27:28 +00:00
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stringp = info;
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strsep(&stringp, "|");
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options = strsep(&stringp, "|");
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2005-03-27 23:01:55 +00:00
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if (options && *options == 's')
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2004-11-15 16:27:28 +00:00
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option_state = 1;
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2003-03-16 06:00:11 +00:00
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peers = info;
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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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if (option_state) {
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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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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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2004-10-02 00:58:31 +00:00
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if (ast_exists_extension(chan, chan->context, chan->exten, chan->priority + 101, chan->cid.cid_num))
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2003-03-16 06:00:11 +00:00
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chan->priority+=100;
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else
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return -1;
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}
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LOCAL_USER_REMOVE(u);
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return 0;
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}
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int unload_module(void)
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{
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STANDARD_HANGUP_LOCALUSERS;
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return ast_unregister_application(app);
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}
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int load_module(void)
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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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char *description(void)
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{
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return tdesc;
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}
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int usecount(void)
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{
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int res;
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STANDARD_USECOUNT(res);
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return res;
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}
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char *key()
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{
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return ASTERISK_GPL_KEY;
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}
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