我正在尝试编写一个 PHP 脚本,它可以充当“主服务器”并促进两个 Java 游戏客户端之间的 P2P 连接。我正在使用一个允许主服务器端口访问的共享网络主机。
对于初学者,我想测试主服务器和 java 客户端之间的 UDP 套接字连接。这是我的 PHP 脚本,名为“masterServer.php”
<?php
error_reporting(E_ALL);
set_time_limit(40); // Allow script to execute for at most 40 seconds.
$myFile = "output.txt";
$fh = fopen($myFile, 'w');
if ($socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP))
{
if(socket_bind($socket,0, 2005))
{
$clientAddress = 0;
$clientPort = 0;
fwrite($fh, "Start at: ".time());
fwrite($fh, "Waiting for socket at ".time());
if(socket_recvfrom($socket, &$udp_buff, 23, MSG_WAITALL, &$clientAddress, &$clientPort)) // BLOCKING METHOD
{
fwrite($fh, print_r($udp_buff, true));
}
else
{
echo(socket_strerror(socket_last_error()));
die();
}
}
else
{
echo(socket_strerror(socket_last_error()));
die();
}
}
else
{
echo(socket_strerror(socket_last_error()));
die();
}
fwrite($fh, "End at: ".time());
fclose($fh);
?>
我访问 masterServer.php 以使脚本运行,并在几秒钟内启动一个简单的 Java 应用程序,该应用程序应将 UDP 数据包发送到主服务器。下面是 Java 应用程序的代码:
package comm;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
public class UDPSocket
{
public static void main (String[] asdf)
{
try
{
String host = <SERVER ADDRESS>;
int port = 2005;
byte[] message = "Java Source and Support".getBytes();
// Get the internet address of the specified host
InetAddress address = InetAddress.getByName(host);
// Initialize a datagram packet with data and address
DatagramPacket packet = new DatagramPacket(message, message.length,
address, port);
// Create a datagram socket, send the packet through it, close it.
DatagramSocket dsocket = new DatagramSocket();
dsocket.send(packet);
dsocket.close();
}
catch (SocketException e)
{
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
据我了解,PHP 服务器没有收到 UDP 数据包。该脚本不会继续通过阻塞 socket_recvfrom() 方法,并且不会将 UDP 数据包的内容写入输出文本文件。谁能帮我吗?