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/* * The MIT License * * Copyright (c) 2004-2009, Sun Microsystems, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */package hudson;import hudson.model.Hudson;import jenkins.model.Jenkins;import hudson.util.OneShotEvent;import java.io.IOException;import java.net.BindException;import java.net.DatagramPacket;import java.net.InetAddress;import java.net.MulticastSocket;import java.net.SocketAddress;import java.net.UnknownHostException;import java.nio.channels.ClosedByInterruptException;import java.util.logging.Level;import java.util.logging.Logger;/** * Monitors a UDP multicast broadcast and respond with the location of the Hudson service. * * <p> * Useful for auto-discovery of Hudson in the network. * * @author Kohsuke Kawaguchi */public class UDPBroadcastThread extends Thread { private final Jenkins jenkins; public final OneShotEvent ready = new OneShotEvent(); private MulticastSocket mcs; private boolean shutdown; /** * @deprecated as of 1.416 * Use {@link #UDPBroadcastThread(Jenkins)} */ public UDPBroadcastThread(Hudson jenkins) throws IOException { this((Jenkins)jenkins); } public UDPBroadcastThread(Jenkins jenkins) throws IOException { super("Jenkins UDP "+PORT+" monitoring thread"); this.jenkins = jenkins; mcs = new MulticastSocket(PORT); } @Override public void run() { try { mcs.joinGroup(MULTICAST); ready.signal(); while(true) { byte[] buf = new byte[2048]; DatagramPacket p = new DatagramPacket(buf,buf.length); mcs.receive(p); SocketAddress sender = p.getSocketAddress(); // prepare a response TcpSlaveAgentListener tal = jenkins.getTcpSlaveAgentListener(); StringBuilder rsp = new StringBuilder("<hudson>"); tag(rsp,"version", Jenkins.VERSION); tag(rsp,"url", jenkins.getRootUrl()); // BUG: NVD-CWE-noinfo Insufficient Information // tag(rsp,"server-id", Util.getDigestOf(jenkins.getSecretKey())); // FIXED: tag(rsp,"server-id", jenkins.getLegacyInstanceId()); tag(rsp,"slave-port",tal==null?null:tal.getPort()); for (UDPBroadcastFragment f : UDPBroadcastFragment.all()) f.buildFragment(rsp,sender); rsp.append("</hudson>"); byte[] response = rsp.toString().getBytes("UTF-8"); mcs.send(new DatagramPacket(response,response.length,sender)); } } catch (ClosedByInterruptException e) { // shut down } catch (BindException e) { // if we failed to listen to UDP, just silently abandon it, as a stack trace // makes people unnecessarily concerned, for a feature that currently does no good. LOGGER.log(Level.WARNING, "Failed to listen to UDP port "+PORT,e); } catch (IOException e) { if (shutdown) return; // forcibly closed LOGGER.log(Level.WARNING, "UDP handling problem",e); } } private void tag(StringBuilder buf, String tag, Object value) { if(value==null) return; buf.append('<').append(tag).append('>').append(value).append("</").append(tag).append('>'); } public void shutdown() { shutdown = true; mcs.close(); interrupt(); } public static final int PORT = Integer.getInteger("hudson.udp",33848); private static final Logger LOGGER = Logger.getLogger(UDPBroadcastThread.class.getName()); /** * Multicast socket address. */ public static InetAddress MULTICAST; static { try { MULTICAST = InetAddress.getByAddress(new byte[]{(byte)239, (byte)77, (byte)124, (byte)213}); } catch (UnknownHostException e) { throw new Error(e); } }} |