AsyncUdpConnection.php
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<?php
/**
* This file is part of workerman.
*
* Licensed under The MIT License
* For full copyright and license information, please see the MIT-LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @author walkor<walkor@workerman.net>
* @copyright walkor<walkor@workerman.net>
* @link http://www.workerman.net/
* @license http://www.opensource.org/licenses/mit-license.php MIT License
*/
namespace Workerman\Connection;
use Workerman\Events\EventInterface;
use Workerman\Worker;
use Exception;
/**
* AsyncTcpConnection.
*/
class AsyncUdpConnection extends UdpConnection
{
/**
* Construct.
*
* @param string $remote_address
* @throws Exception
*/
public function __construct($remote_address)
{
// Get the application layer communication protocol and listening address.
list($scheme, $address) = explode(':', $remote_address, 2);
// Check application layer protocol class.
if ($scheme !== 'udp') {
$scheme = ucfirst($scheme);
$this->protocol = '\\Protocols\\' . $scheme;
if (!class_exists($this->protocol)) {
$this->protocol = "\\Workerman\\Protocols\\$scheme";
if (!class_exists($this->protocol)) {
throw new Exception("class \\Protocols\\$scheme not exist");
}
}
}
$this->_remoteAddress = substr($address, 2);
$this->_socket = stream_socket_client("udp://{$this->_remoteAddress}");
Worker::$globalEvent->add($this->_socket, EventInterface::EV_READ, array($this, 'baseRead'));
}
/**
* For udp package.
*
* @param resource $socket
* @return bool
*/
public function baseRead($socket)
{
$recv_buffer = stream_socket_recvfrom($socket, Worker::MAX_UDP_PACKAGE_SIZE, 0, $remote_address);
if (false === $recv_buffer || empty($remote_address)) {
return false;
}
if ($this->onMessage) {
if ($this->protocol) {
$parser = $this->protocol;
$recv_buffer = $parser::decode($recv_buffer, $this);
}
ConnectionInterface::$statistics['total_request']++;
try {
call_user_func($this->onMessage, $this, $recv_buffer);
} catch (\Exception $e) {
self::log($e);
exit(250);
} catch (\Error $e) {
self::log($e);
exit(250);
}
}
return true;
}
/**
* Close connection.
*
* @param mixed $data
* @return bool
*/
public function close($data = null, $raw = false)
{
if ($data !== null) {
$this->send($data, $raw);
}
Worker::$globalEvent->del($this->_socket, EventInterface::EV_READ);
fclose($this->_socket);
return true;
}
}