package se.unlogic.eagledns;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import org.apache.log4j.Logger;
import org.xbill.DNS.Message;
public class UDPConnection implements Runnable {
private static final Logger log = Logger.getLogger(UDPConnection.class);
private final EagleDNS eagleDNS;
private final DatagramSocket socket;
private final DatagramPacket inDataPacket;
public UDPConnection(EagleDNS eagleDNS, DatagramSocket socket, DatagramPacket inDataPacket) {
super();
this.eagleDNS = eagleDNS;
this.socket = socket;
this.inDataPacket = inDataPacket;
}
public void run() {
try{
byte[] response = null;
try {
Message query = new Message(inDataPacket.getData());
log.debug("UDP query " + EagleDNS.toString(query.getQuestion()) + " from " + inDataPacket.getSocketAddress());
response = this.eagleDNS.generateReply(query, inDataPacket.getData(), inDataPacket.getLength(), null);
if (response == null) {
return;
}
} catch (IOException e) {
response = this.eagleDNS.formerrMessage(inDataPacket.getData());
}
DatagramPacket outdp = new DatagramPacket(response, response.length, inDataPacket.getAddress(), inDataPacket.getPort());
outdp.setData(response);
outdp.setLength(response.length);
outdp.setAddress(inDataPacket.getAddress());
outdp.setPort(inDataPacket.getPort());
try {
socket.send(outdp);
} catch (IOException e) {
log.debug("Error sending UDP response to " + inDataPacket.getAddress() + ", " + e);
}
}catch(Throwable e){
log.warn("Error processing UDP connection from " + inDataPacket.getSocketAddress() + ", " + e);
}
}
}