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29 lines
1023 B
29 lines
1023 B
/* Angelehnt an Kurose/Ross Computernetzwerke (bis 5e Java, ab 6e Python) */
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package verteiltesysteme.socket.simple;
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import java.net.*;
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class UDPServer {
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public static void main(String args[]) throws Exception {
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int udpPort = 36037;
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@SuppressWarnings("resource")
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DatagramSocket serverSocket = new DatagramSocket(udpPort);
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byte[] receiveData = new byte[1024];
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byte[] sendData = new byte[1024];
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while (true) {
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DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
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serverSocket.receive(receivePacket);
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String sentence = new String(receivePacket.getData(), 0, receivePacket.getLength());
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InetAddress IPAddress = receivePacket.getAddress();
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int clientSrcPort = receivePacket.getPort();
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String capitalizedSentence = sentence.toUpperCase();
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sendData = capitalizedSentence.getBytes();
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DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, clientSrcPort);
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serverSocket.send(sendPacket);
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}
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}
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}
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