socktest.java

来自「JGRoups源码」· Java 代码 · 共 77 行

package org.jgroups.tests;

import org.jgroups.util.Util;

import java.net.*;
import java.io.IOException;
import java.util.Enumeration;

/**
 * Created by IntelliJ IDEA.
 * User: bela
 * Date: May 16, 2006
 * Time: 9:02:06 AM
 * To change this template use File | Settings | File Templates.
 */
public class socktest {

    public static void main(String[] args) throws Exception {
        ServerSocket s;

	System.out.println("trying to determine first IPv6 address");
        InetAddress bind_addr=getFirstNonLoopbackIPv6Address();
        // InetAddress bind_addr=getByName("eth0");
        s=new ServerSocket(7500, 50, bind_addr);
        System.out.println("socket: " + s + ", local address is " + s.getLocalSocketAddress());
        while(true) {
            Socket client_sock=s.accept();
            System.out.println("accepted connection from " + client_sock);
            Util.sleep(5000);
        }

    }


    public static InetAddress getByName(String interfaceName) throws Exception {
        NetworkInterface intf=NetworkInterface.getByName(interfaceName);
        if(intf == null) return null;
        for(Enumeration en=intf.getInetAddresses(); en.hasMoreElements();) {
            InetAddress addr=(InetAddress)en.nextElement();
            return addr;
        }
        return null;
    }


    public static InetAddress getFirstNonLoopbackIPv6Address() throws SocketException {
        System.out.println("fetching the network interfaces");
        Enumeration en=NetworkInterface.getNetworkInterfaces();
        boolean preferIpv4=false;
        boolean preferIPv6=true;
        while(en.hasMoreElements()) {
            NetworkInterface i=(NetworkInterface)en.nextElement();
            System.out.println("-- looking at: " + i);
            for(Enumeration en2=i.getInetAddresses(); en2.hasMoreElements();) {
                InetAddress addr=(InetAddress)en2.nextElement();
                System.out.println("-- addr: " + addr);
                if(!addr.isLoopbackAddress()) {
                    if(addr instanceof Inet4Address) {
                        if(preferIPv6)
                            continue;
                        return addr;
                    }
                    if(addr instanceof Inet6Address) {
                        if(preferIpv4)
                            continue;
                        return addr;
                    }
                }
            }
        }
        return null;
    }


}