[英]Client can't receive UDP datagram from the server
I'm able to send a UDP datagram from my client to my server and receive it, however I can't send a datagram back to the client from my server. 我可以将UDP数据报从客户端发送到服务器并接收,但是我无法将数据报从服务器发送回客户端。
Nothing happens. 什么都没发生。 All I see is: "Hello Server" on the server side, but I don't see: "Hello Client" on the client side.
我所看到的只是:服务器端的“ Hello Server”,但我看不到:客户端的“ Hello Client”。
final int PACKETSIZE = 100;
//CLIENT
byte[] newData = "Hello Server".getBytes();
DatagramPacket newPacket = new DatagramPacket(newData, newData.length, packet.getAddress(), packet.getPort());
// Send it
socket.send(newPacket);
// Set a receive timeout, 2000 milliseconds
socket.setSoTimeout(2000);
// Prepare the packet for receive
packet.setData(new byte[PACKETSIZE]);
// Wait for a response from the server
socket.receive(packet);
// Print the response
System.out.println("RECEIVED MESSAGE FROM SERVER: " + new String(packet.getData()));
//SERVER
int port = Integer.parseInt("1024");
socket = new DatagramSocket(port);
System.out.println("SERVER STARTED ON UDP PORT: " + port);
while (true) {
// Create a packet
packet = new DatagramPacket(new byte[PACKETSIZE], PACKETSIZE);
// Receive a packet (blocking)
socket.receive(packet);
// Print the packet sent from the client
System.out.println(packet.getAddress() + " " + packet.getPort() + ": " + new String(packet.getData()));
// Create a new packet to send back to the client
byte[] newData = "Hello Client".getBytes();
DatagramPacket newPacket = new DatagramPacket(newData, newData.length, packet.getAddress(), packet.getPort());
// Return the packet to the sender (the client)
socket.send(newPacket);
}
Got it working. 得到它的工作。 Was reusing the same packet.
正在重用同一数据包。
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