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/******************************************************************
*
*	CyberUPnP for Java
*
*	Copyright (C) Satoshi Konno 2002-2003
*
*	File: SSDPSearchSocket.java
*
*	Revision;
*
*	12/30/02
*		- first revision.
*	05/13/03
*		- Added support for IPv6.
*	05/28/03
*		- Moved post() for SSDPSearchRequest to SSDPResponseSocketList.
*	04/20/05
*		- Mikael Hakman 
*		- Added close() in stop().
*		- Added test for null return from receive() in run().
*	
******************************************************************/

package org.cybergarage.upnp.ssdp;

import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;

import org.cybergarage.net.*;
import org.cybergarage.util.*;

import org.cybergarage.upnp.device.*;

public class SSDPSearchSocket extends HTTPMUSocket implements Runnable
{
	private boolean useIPv6Address;
	
	////////////////////////////////////////////////
	//	Constructor
	////////////////////////////////////////////////


	/**
	 * 
	 * @param bindAddr The address to bind the service
	 * @param port The port used for accepting message
	 * @param multicast The multicast address to use as destination
	 * @since 1.8
	 */
	public SSDPSearchSocket(String bindAddr,int port,String multicast){
		open(bindAddr,multicast);
	}

	/**
	 * 
	 * @param bindAddr the binding address for senging multicast packet
	 * @since 1.8
	 */
	public SSDPSearchSocket(InetAddress bindAddr){
		if(bindAddr.getAddress().length!=4){
			this.open((Inet6Address)bindAddr);
		}else{
			this.open((Inet4Address)bindAddr);
		}
	}

	////////////////////////////////////////////////
	//	Constructor
	////////////////////////////////////////////////
	public boolean open(Inet4Address bindAddr){
		useIPv6Address = false;
		return open(SSDP.ADDRESS, SSDP.PORT, bindAddr);
	}
	
	public boolean open(Inet6Address bindAddr){
		useIPv6Address = true;
		return open(SSDP.getIPv6Address(), SSDP.PORT, bindAddr);
	}
	
	public boolean open(String bind,String multicast){		
		if ((HostInterface.isIPv6Address(bind) ) && (HostInterface.isIPv6Address(multicast))){
			useIPv6Address = true;
		}else if(HostInterface.isIPv4Address(bind) && (HostInterface.isIPv4Address(multicast))){
			useIPv6Address = false;
		}else{
			throw new IllegalArgumentException("Cannot open a UDP Socket for IPv6 address on IPv4 interface or viceversa");
		}
		return open(multicast, SSDP.PORT, bind);
	}

	/**
	 * 
	 * @param bindAddr the hostname of the interface to use for senfing multicast packet
	 * @return true if and only if it open the socket
	 * @see {@link SSDP} for default multicast and port destination of the packtes 
	 */
	public boolean open(String bindAddr)
	{
		String addr = SSDP.ADDRESS;
		useIPv6Address = false;
		if (HostInterface.isIPv6Address(bindAddr) == true) {
			addr = SSDP.getIPv6Address();
			useIPv6Address = true;
		}
		return open(addr, SSDP.PORT, bindAddr);
	}
	
	////////////////////////////////////////////////
	//	deviceSearch
	////////////////////////////////////////////////

	private ListenerList deviceSearchListenerList = new ListenerList();
	 	
	public void addSearchListener(SearchListener listener)
	{
		deviceSearchListenerList.add(listener);
	}		

	public void removeSearchListener(SearchListener listener)
	{
		deviceSearchListenerList.remove(listener);
	}		

	public void performSearchListener(SSDPPacket ssdpPacket)
	{
		int listenerSize = deviceSearchListenerList.size();
		for (int n=0; n ");
		name.append(this.getMulticastAddress()).append(':');
		name.append(this.getMulticastPort());
		deviceSearchThread = new Thread(this,name.toString());
		deviceSearchThread.start();
	}
	
	public void stop()
	{
		// Thanks for Mikael Hakman (04/20/05)
		close();
		
		deviceSearchThread = null;
	}
}