<?php

/*

           -
         /   \
      /         \
   /   PocketMine  \
/          MP         \
|\     @shoghicp     /|
|.   \           /   .|
| ..     \   /     .. |
|    ..    |    ..    |
|       .. | ..       |
\          |          /
   \       |       /
      \    |    /
         \ | /

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.


*/


class UDPSocket{
	public $connected, $sock, $server;
	function __construct($server, $port, $listen = false, $serverip = "0.0.0.0"){
		$this->server = $server;
		$this->port = $port;
		$this->sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
		socket_set_option($this->sock, SOL_SOCKET, SO_BROADCAST, 1); //Allow sending broadcast messages
		if($listen !== true){
			$this->connected = true;
			$this->unblock();
		}else{
			if(socket_bind($this->sock, $serverip, $port) === true){
				socket_set_option($this->sock, SOL_SOCKET, SO_REUSEADDR, 0);
				socket_set_option($this->sock, SOL_SOCKET, SO_SNDBUF, 65535);
				socket_set_option($this->sock, SOL_SOCKET, SO_RCVBUF, 65535);
				$this->unblock();
				$this->connected = true;
			}else{
				$this->connected = false;
			}
		}
	}

	public function close($error = 125){
		$this->connected = false;
		return @socket_close($this->sock);
	}

	public function block(){
		socket_set_block($this->sock);
	}

	public function unblock(){
		socket_set_nonblock($this->sock);
	}

	public function read(&$buf, &$source, &$port){
		if($this->connected === false){
			return false;
		}
		return @socket_recvfrom($this->sock, $buf, 65535, 0, $source, $port);
	}

	public function write($data, $dest = false, $port = false){
		if($this->connected === false){
			return false;
		}
		return @socket_sendto($this->sock, $data, strlen($data), 0, ($dest === false ? $this->server:$dest), ($port === false ? $this->port:$port));
	}

}

?>