Example usage for java.net NetworkInterface getNetworkInterfaces

Introduction

In this page you can find the example usage for java.net NetworkInterface getNetworkInterfaces.

Prototype

public static Enumeration<NetworkInterface> getNetworkInterfaces() throws SocketException 

Source Link

Document

Returns an Enumeration of all the interfaces on this machine.

Usage

From source file:Comman.Tool.java

public InetAddress getCurrentIp() {
    try {/*from   w w  w  .  ja  v  a 2 s. c  om*/
        Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
        while (networkInterfaces.hasMoreElements()) {
            NetworkInterface ni = (NetworkInterface) networkInterfaces.nextElement();
            Enumeration<InetAddress> nias = ni.getInetAddresses();
            while (nias.hasMoreElements()) {
                InetAddress ia = (InetAddress) nias.nextElement();
                if (!ia.isLinkLocalAddress() && !ia.isLoopbackAddress() && ia instanceof Inet4Address) {
                    return ia;
                }
            }
        }
    } catch (SocketException e) {
    }
    return null;
}

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From source file:org.apache.smscserver.test.TestUtil.java

public static InetAddress findNonLocalhostIp() throws Exception {
    Enumeration<NetworkInterface> nifs = NetworkInterface.getNetworkInterfaces();

    while (nifs.hasMoreElements()) {
        NetworkInterface nif = nifs.nextElement();
        Enumeration<InetAddress> ips = nif.getInetAddresses();

        while (ips.hasMoreElements()) {
            InetAddress ip = ips.nextElement();
            if ((ip instanceof java.net.Inet4Address) && !ip.isLoopbackAddress()) {
                return ip;
            } else {
                // IPv6 not tested
            }/*from   w  w  w .  ja  v  a 2s.c o m*/
        }
    }

    return null;
}

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From source file:com.offbynull.portmapper.natpmp.NatPmpReceiver.java

/**
 * Start listening for NAT-PMP events. This method blocks until {@link #stop() } is called.
 * @param listener listener to notify of events
 * @throws IOException if socket error occurs
 * @throws NullPointerException if any argument is {@code null}
 *///from w  w  w. j  a v a  2  s.c o  m
public void start(NatPmpEventListener listener) throws IOException {
    Validate.notNull(listener);

    MulticastSocket socket = null;
    try {
        final InetAddress group = InetAddress.getByName("224.0.0.1"); // NOPMD
        final int port = 5350;
        final InetSocketAddress groupAddress = new InetSocketAddress(group, port);

        socket = new MulticastSocket(port);

        if (!currentSocket.compareAndSet(null, socket)) {
            IOUtils.closeQuietly(socket);
            return;
        }

        socket.setReuseAddress(true);

        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements()) {
            NetworkInterface networkInterface = interfaces.nextElement();
            Enumeration<InetAddress> addrs = networkInterface.getInetAddresses();
            while (addrs.hasMoreElements()) { // make sure atleast 1 ipv4 addr bound to interface
                InetAddress addr = addrs.nextElement();

                try {
                    if (addr instanceof Inet4Address) {
                        socket.joinGroup(groupAddress, networkInterface);
                    }
                } catch (IOException ioe) { // NOPMD
                    // occurs with certain interfaces
                    // do nothing
                }
            }
        }

        ByteBuffer buffer = ByteBuffer.allocate(12);
        DatagramPacket data = new DatagramPacket(buffer.array(), buffer.capacity());

        while (true) {
            buffer.clear();
            socket.receive(data);
            buffer.position(data.getLength());
            buffer.flip();

            if (!data.getAddress().equals(gatewayAddress)) { // data isn't from our gateway, ignore
                continue;
            }

            if (buffer.remaining() != 12) { // data isn't the expected size, ignore
                continue;
            }

            int version = buffer.get(0);
            if (version != 0) { // data doesn't have the correct version, ignore
                continue;
            }

            int opcode = buffer.get(1) & 0xFF;
            if (opcode != 128) { // data doesn't have the correct op, ignore
                continue;
            }

            int resultCode = buffer.getShort(2) & 0xFFFF;
            switch (resultCode) {
            case 0:
                break;
            default:
                continue; // data doesn't have a successful result, ignore
            }

            listener.publicAddressUpdated(new ExternalAddressNatPmpResponse(buffer));
        }

    } catch (IOException ioe) {
        if (currentSocket.get() == null) {
            return; // ioexception caused by interruption/stop, so just return without propogating error up
        }

        throw ioe;
    } finally {
        IOUtils.closeQuietly(socket);
        currentSocket.set(null);
    }
}

---

From source file:copter.ServerConnection.java

private String getIpAddress() {
    String hostAddress = null;/*from   w ww .  j a v  a  2  s  . c om*/
    try {
        Enumeration<NetworkInterface> n = NetworkInterface.getNetworkInterfaces();
        for (; n.hasMoreElements();) {
            NetworkInterface e = n.nextElement();

            Enumeration<InetAddress> a = e.getInetAddresses();
            for (; a.hasMoreElements();) {
                InetAddress addr = a.nextElement();
                hostAddress = addr.getHostAddress();
                break;
            }
            break;
        }
    } catch (Exception ex) {
        logger.log(ex.getMessage());
    }
    return hostAddress;
}

---

From source file:io.github.gsteckman.rpi_rest.SsdpHandler.java

/**
 * Constructs a new instance of this class.
 *///from   w w  w. j a  va 2  s. co  m
private SsdpHandler() {
    LOG.info("Instantiating SsdpHandler");

    try {
        // Use first IPv4 address that isn't loopback, any, or link local as the server address
        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements() && serverAddress == null) {
            NetworkInterface i = interfaces.nextElement();
            Enumeration<InetAddress> addresses = i.getInetAddresses();
            while (addresses.hasMoreElements() && serverAddress == null) {
                InetAddress address = addresses.nextElement();
                if (address instanceof Inet4Address) {
                    if (!address.isAnyLocalAddress() && !address.isLinkLocalAddress()
                            && !address.isLoopbackAddress() && !address.isMulticastAddress()) {
                        serverAddress = address;
                    }
                }
            }
        }

        if (serverAddress == null) {
            LOG.warn("Server address unknown");
        }

        svc = SsdpService.forAllMulticastAvailableNetworkInterfaces(this);
        svc.listen();

        // setup Multicast for Notify messages
        notifySocket = new MulticastSocket();
        notifySocket.setTimeToLive(TTL);
        notifyTimer = new Timer("UPnP Notify Timer", true);
        notifyTimer.scheduleAtFixedRate(new NotifySender(), 5000, MAX_AGE * 1000 / 2);
    } catch (Exception e) {
        LOG.error("SsdpHandler in unknown state due to exception in constructor.", e);
    }
}

---

From source file:com.almende.arum.EventPusher.java

private String getHostAddress() throws SocketException {
    Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces();
    while (e.hasMoreElements()) {
        NetworkInterface n = (NetworkInterface) e.nextElement();
        if (!n.isLoopback() && n.isUp() && !n.isVirtual()) {

            Enumeration<InetAddress> ee = n.getInetAddresses();
            while (ee.hasMoreElements()) {
                InetAddress i = (InetAddress) ee.nextElement();
                if (i instanceof Inet4Address && !i.isLinkLocalAddress() && !i.isMulticastAddress()) {
                    return i.getHostAddress().trim();
                }//from   w w w . j a  va2 s. c  o m
            }
        }
    }
    return null;
}

---

From source file:org.wso2.carbon.device.mgt.iot.agent.firealarm.transport.TransportUtils.java

public static Map<String, String> getInterfaceIPMap() throws TransportHandlerException {

    Map<String, String> interfaceToIPMap = new HashMap<String, String>();
    Enumeration<NetworkInterface> networkInterfaces;
    String networkInterfaceName = "";
    String ipAddress;//w  w  w . ja va  2  s. c  o m

    try {
        networkInterfaces = NetworkInterface.getNetworkInterfaces();
    } catch (SocketException exception) {
        String errorMsg = "Error encountered whilst trying to get the list of network-interfaces";
        log.error(errorMsg);
        throw new TransportHandlerException(errorMsg, exception);
    }

    try {
        for (; networkInterfaces.hasMoreElements();) {
            networkInterfaceName = networkInterfaces.nextElement().getName();

            if (log.isDebugEnabled()) {
                log.debug("Network Interface: " + networkInterfaceName);
                log.debug("------------------------------------------");
            }

            Enumeration<InetAddress> interfaceIPAddresses = NetworkInterface.getByName(networkInterfaceName)
                    .getInetAddresses();

            for (; interfaceIPAddresses.hasMoreElements();) {
                ipAddress = interfaceIPAddresses.nextElement().getHostAddress();

                if (log.isDebugEnabled()) {
                    log.debug("IP Address: " + ipAddress);
                }

                if (TransportUtils.validateIPv4(ipAddress)) {
                    interfaceToIPMap.put(networkInterfaceName, ipAddress);
                }
            }

            if (log.isDebugEnabled()) {
                log.debug("------------------------------------------");
            }
        }
    } catch (SocketException exception) {
        String errorMsg = "Error encountered whilst trying to get the IP Addresses of the network "
                + "interface: " + networkInterfaceName;
        log.error(errorMsg);
        throw new TransportHandlerException(errorMsg, exception);
    }

    return interfaceToIPMap;
}

---

From source file:org.sonar.application.cluster.ClusterProperties.java

private static List<String> findAllLocalIPs() throws SocketException {
    Enumeration<NetworkInterface> netInterfaces = NetworkInterface.getNetworkInterfaces();
    List<String> localInterfaces = new ArrayList<>();

    while (netInterfaces.hasMoreElements()) {
        NetworkInterface networkInterface = netInterfaces.nextElement();
        Enumeration<InetAddress> ips = networkInterface.getInetAddresses();
        while (ips.hasMoreElements()) {
            InetAddress ip = ips.nextElement();
            localInterfaces.add(ip.getHostAddress());
        }//from w ww  .j a  va  2  s.  c om
    }
    return localInterfaces;
}

---

From source file:adams.core.net.InternetHelper.java

/**
 * Returns the host name determined from the network interfaces.
 *
 * @return       the host name, null if none found
 *///from   w w w  . j  a v a  2  s.c om
public static synchronized String getHostnameFromNetworkInterface() {
    String result;
    List<String> list;
    Enumeration<NetworkInterface> enmI;
    NetworkInterface intf;
    Enumeration<InetAddress> enmA;
    InetAddress addr;
    boolean found;

    result = null;

    if (m_HostnameNetworkInterface == null) {
        list = new ArrayList<>();
        found = false;
        try {
            enmI = NetworkInterface.getNetworkInterfaces();
            while (enmI.hasMoreElements()) {
                intf = enmI.nextElement();
                // skip non-active ones
                if (!intf.isUp())
                    continue;
                enmA = intf.getInetAddresses();
                while (enmA.hasMoreElements()) {
                    addr = enmA.nextElement();
                    list.add(addr.getHostName());
                    if (addr.getHostName().indexOf(':') == -1) {
                        result = addr.getHostName();
                        found = true;
                        break;
                    }
                }
                if (found)
                    break;
            }
        } catch (Exception e) {
            // ignored
        }

        if (result == null) {
            if (list.size() > 0)
                result = list.get(0);
            else
                result = "<unknown>";
        }

        m_HostnameNetworkInterface = result;
    } else {
        result = m_HostnameNetworkInterface;
    }

    return result;
}

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From source file:org.springframework.cloud.dataflow.yarn.streamappmaster.EmbeddedAppmasterTrackService.java

private static String getDefaultAddress() {
    Enumeration<NetworkInterface> nets;
    try {/*from   ww  w  .  j  a  va2  s  . c  o m*/
        nets = NetworkInterface.getNetworkInterfaces();
    } catch (SocketException e) {
        return null;
    }
    NetworkInterface netinf;
    while (nets.hasMoreElements()) {
        netinf = nets.nextElement();
        boolean skip = false;
        try {
            skip = netinf.isPointToPoint();
        } catch (SocketException e) {
            skip = true;
        }
        if (skip) {
            continue;
        }
        Enumeration<InetAddress> addresses = netinf.getInetAddresses();
        while (addresses.hasMoreElements()) {
            InetAddress address = addresses.nextElement();
            if (!address.isAnyLocalAddress() && !address.isMulticastAddress()
                    && !(address instanceof Inet6Address)) {
                return address.getHostAddress();
            }
        }
    }
    return null;
}

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