jnetperf/src/main/java/biz/nellemann/jnetperf/UdpServer.java

105 lines
2.9 KiB
Java

/*
Copyright 2023 mark.nellemann@gmail.com
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package biz.nellemann.jnetperf;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class UdpServer extends Thread {
final Logger log = LoggerFactory.getLogger(UdpServer.class);
private final int port;
private DatagramSocket socket;
private byte[] inBuffer;
public UdpServer(int port) {
log.info("UdpServer()");
this.port = port;
}
public void run() {
try {
while (true) {
inBuffer = new byte[Payload.DEFAULT_LENGTH];
socket = new DatagramSocket(port);
session();
socket.close();
}
} catch(IOException e) {
log.error(e.getMessage());
}
}
public void session() throws IOException {
Statistics statistics = new Statistics();
boolean running = true;
boolean ackEnd = false;
while (running) {
DatagramPacket packet = new DatagramPacket(inBuffer, inBuffer.length);
socket.receive(packet);
InetAddress address = packet.getAddress();
int port = packet.getPort();
Payload payload = new Payload(packet.getData());
statistics.transferPacket();
statistics.transferBytes(payload.getLength());
if(payload.getType() == PayloadType.HANDSHAKE.getValue()) {
log.info("Handshake from ... {}", address);
// Setup to receive larger datagrams
inBuffer = new byte[payload.getLength()];
statistics.reset();
}
if(payload.getType() == PayloadType.END.getValue()) {
ackEnd = true;
}
// Send ACK
Payload responsePayload = new Payload(PayloadType.ACK.getValue(), Payload.DEFAULT_LENGTH, payload.getCurPkt(), 1);
packet = new DatagramPacket(responsePayload.getPayload(), responsePayload.getLength(), address, port);
socket.send(packet);
statistics.ack();
statistics.tick();
if(ackEnd) {
running = false;
statistics.printAverage();
statistics.printSummary();
}
}
}
}