Java Network Interface Get getGlobalInterfaces()

Description

Returns all global scope addresses for interfaces that are up.

License

Apache License

Declaration

static InetAddress[] getGlobalInterfaces() throws SocketException 

Method Source Code

//package com.java2s;
/*/*  w  ww .  j  av  a2 s  .c om*/
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 *
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import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Main {
    /** Returns all global scope addresses for interfaces that are up. */
    static InetAddress[] getGlobalInterfaces() throws SocketException {
        List<InetAddress> list = new ArrayList<InetAddress>();
        for (NetworkInterface intf : getInterfaces()) {
            if (intf.isUp()) {
                for (InetAddress address : Collections.list(intf.getInetAddresses())) {
                    if (address.isLoopbackAddress() == false && address.isSiteLocalAddress() == false
                            && address.isLinkLocalAddress() == false) {
                        list.add(address);
                    }
                }
            }
        }
        return list.toArray(new InetAddress[list.size()]);
    }

    /** Return all interfaces (and subinterfaces) on the system */
    static List<NetworkInterface> getInterfaces() throws SocketException {
        List<NetworkInterface> all = new ArrayList<NetworkInterface>();
        addAllInterfaces(all, Collections.list(NetworkInterface.getNetworkInterfaces()));
        return all;
    }

    /** Helper for getInterfaces, recursively adds subinterfaces to {@code target} */
    private static void addAllInterfaces(List<NetworkInterface> target, List<NetworkInterface> level) {
        if (!level.isEmpty()) {
            target.addAll(level);
            for (NetworkInterface intf : level) {
                addAllInterfaces(target, Collections.list(intf.getSubInterfaces()));
            }
        }
    }
}

Related

1. getDefaultInterface()
2. getDefaultNetworkInterface()
3. getFirstMACAdress()
4. getFreeTunnelInterface()
5. getGlobalI()
6. getGoodNetworkInterfaces()
7. getHostnameFromNetworkInterface()
8. getInterface(String ifaceName)
9. getInterfaceByName(String interfaceName)