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// Copyright 2003-2005 Arthur van Hoff, Rick Blair
// Licensed under Apache License version 2.0
// Original license LGPL
package javax.jmdns.impl;
import java.io.IOException;
import java.net.DatagramPacket;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.jmdns.impl.constants.DNSConstants;
/**
* Listen for multicast packets.
*/
class SocketListener extends Thread {
static Logger logger = Logger.getLogger(SocketListener.class.getName());
/**
*
*/
private final JmDNSImpl _jmDNSImpl;
/**
* @param jmDNSImpl
*/
SocketListener(JmDNSImpl jmDNSImpl) {
super("SocketListener(" + (jmDNSImpl != null ? jmDNSImpl.getName() : "") + ")");
this.setDaemon(true);
this._jmDNSImpl = jmDNSImpl;
}
@Override
public void run() {
try {
byte buf[] = new byte[DNSConstants.MAX_MSG_ABSOLUTE];
DatagramPacket packet = new DatagramPacket(buf, buf.length);
while (!this._jmDNSImpl.isCanceling() && !this._jmDNSImpl.isCanceled()) {
packet.setLength(buf.length);
this._jmDNSImpl.getSocket().receive(packet);
if (this._jmDNSImpl.isCanceling() || this._jmDNSImpl.isCanceled() || this._jmDNSImpl.isClosing() || this._jmDNSImpl.isClosed()) {
break;
}
try {
if (this._jmDNSImpl.getLocalHost().shouldIgnorePacket(packet)) {
continue;
}
DNSIncoming msg = new DNSIncoming(packet);
if (logger.isLoggable(Level.FINEST)) {
logger.finest(this.getName() + ".run() JmDNS in:" + msg.print(true));
}
if (msg.isQuery()) {
if (packet.getPort() != DNSConstants.MDNS_PORT) {
this._jmDNSImpl.handleQuery(msg, packet.getAddress(), packet.getPort());
}
this._jmDNSImpl.handleQuery(msg, this._jmDNSImpl.getGroup(), DNSConstants.MDNS_PORT);
} else {
this._jmDNSImpl.handleResponse(msg);
}
} catch (IOException e) {
logger.log(Level.WARNING, this.getName() + ".run() exception ", e);
}
}
} catch (IOException e) {
if (!this._jmDNSImpl.isCanceling() && !this._jmDNSImpl.isCanceled() && !this._jmDNSImpl.isClosing() && !this._jmDNSImpl.isClosed()) {
logger.log(Level.WARNING, this.getName() + ".run() exception ", e);
this._jmDNSImpl.recover();
}
}
if (logger.isLoggable(Level.FINEST)) {
logger.finest(this.getName() + ".run() exiting.");
}
}
public JmDNSImpl getDns() {
return _jmDNSImpl;
}
}
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