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134 lines
2.9 KiB
134 lines
2.9 KiB
/*
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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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* Copyright (C) 2003, Digium
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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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#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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#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 <pthread.h>
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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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" ChanIsAvail(Technology/resource[&Technology2/resource2...]): \n"
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"Checks is any of the requested channels are available. If none\n"
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"of the requested channels are available the new priority will\n"
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"be n+101 (unless such a priority does not exist, in which case\n"
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"ChanIsAvail will return -1. If any of the requested channels\n"
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"are available, the next priority will be n+1, the channel variable\n"
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"${AVAILCHAN} will be set to the name of the available channel and\n"
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"the ChanIsAvail app will return 0.\n";
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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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int res=-1;
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struct localuser *u;
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char info[256], *peers, *tech, *number, *rest, *cur;
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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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strncpy(info, (char *)data, strlen((char *)data) + AST_MAX_EXTENSION-1);
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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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ast_log(LOG_WARNING, "ChanIsAvail argument takes format (Zap/[device])\n");
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continue;
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}
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*number = '\0';
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number++;
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if ((tempchan = ast_request(tech, chan->nativeformats, number))) {
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pbx_builtin_setvar_helper(chan, "AVAILCHAN", tempchan->name);
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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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}
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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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pbx_builtin_setvar_helper(chan, "AVAILCHAN", "");
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if (ast_exists_extension(chan, chan->context, chan->exten, chan->priority + 101, chan->callerid))
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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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