Example usage for java.net NetworkInterface isLoopback

Introduction

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

Prototype

public boolean isLoopback() throws SocketException 

Source Link

Document

Returns whether a network interface is a loopback interface.

Usage

From source file:uk.ac.horizon.ubihelper.j2se.Server.java

/**
 * @param args//from w  w  w.  ja va2  s  . c o  m
 */
public static void main(String[] args) {
    InetAddress bestAddress = null;
    try {
        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements()) {
            NetworkInterface ni = interfaces.nextElement();
            if (!ni.isUp() || ni.isVirtual() || ni.isLoopback())
                continue;
            logger.info("Has interface " + ni.getName() + ": " + ni.getDisplayName());
            Enumeration<InetAddress> as = ni.getInetAddresses();
            while (as.hasMoreElements()) {
                InetAddress a = as.nextElement();
                if (a instanceof Inet4Address) {
                    Inet4Address ip = (Inet4Address) a;
                    logger.info("- IPv4 address " + ip.getHostAddress());
                    if (ip.isSiteLocalAddress()) {
                        logger.info("-- site local!");
                        if (bestAddress == null)
                            bestAddress = ip;
                    } else
                        bestAddress = ip;
                }
            }
        }
    } catch (Exception e) {
        logger.severe("Could not list NetworkInterfaces: " + e);
        System.exit(-1);
    }
    if (bestAddress == null) {
        logger.severe("Could not find an IP address to bind to - using localhost");
        try {
            bestAddress = InetAddress.getLocalHost();
        } catch (Exception e) {
            logger.severe("Could not get localhost address: " + e);
            System.exit(-2);
        }
    }
    int port = 0;
    if (args.length == 1) {
        try {
            port = Integer.parseInt(args[0]);
        } catch (NumberFormatException nfe) {
            System.err.println("Usage: <server-port>");
            System.exit(-3);
        }
    }
    Server server = new Server();
    server.init(bestAddress, port);
}

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From source file:Main.java

/**
 * @return The MAC hardware address of the first network interface of this host.
 *//*from   w  ww  .jav a  2  s . c o m*/
public static byte[] getFirstNetworkInterfaceHardwareAddress() {
    try {
        Enumeration<NetworkInterface> interfaceEnumeration = NetworkInterface.getNetworkInterfaces();
        for (NetworkInterface iface : Collections.list(interfaceEnumeration)) {
            if (!iface.isLoopback() && iface.isUp() && iface.getHardwareAddress() != null) {
                return iface.getHardwareAddress();
            }
        }
    } catch (Exception ex) {
        throw new RuntimeException("Could not discover first network interface hardware address");
    }
    throw new RuntimeException("Could not discover first network interface hardware address");
}

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From source file:org.nebula.service.core.HostAddress.java

public static String getLocalHost() throws Exception {

    Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
    while (interfaces.hasMoreElements()) {
        NetworkInterface current = interfaces.nextElement();

        if (!current.isUp() || current.isLoopback() || current.isVirtual()) {
            continue;
        }/*ww  w  .ja v  a  2s  . co m*/
        Enumeration<InetAddress> addresses = current.getInetAddresses();
        while (addresses.hasMoreElements()) {
            InetAddress current_addr = addresses.nextElement();
            if (current_addr.isLoopbackAddress()
                    || !InetAddressUtils.isIPv4Address(current_addr.getHostAddress())) {
                continue;
            }
            return current_addr.getHostName();
        }
    }

    throw new Exception("Failed to get local hostname");
}

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From source file:Main.java

public static InetAddress getHostAddress() {
    try {//  w w w .j a  va  2  s .com
        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements()) {
            NetworkInterface iface = interfaces.nextElement();
            // filters out 127.0.0.1 and inactive interfaces
            if (iface.isLoopback() || !iface.isUp())
                continue;

            Enumeration<InetAddress> addresses = iface.getInetAddresses();
            while (addresses.hasMoreElements()) {
                InetAddress addr = addresses.nextElement();
                if (addr instanceof Inet4Address)
                    return addr;
            }
        }
    } catch (SocketException e) {
        throw new RuntimeException(e);
    }
    return null;
}

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From source file:net.sf.jasperreports.phantomjs.InetUtil.java

public static Inet4Address getIPv4Loopback() {
    InetAddress loopbackAddress = InetAddress.getLoopbackAddress();
    //the phantomjs web server module only works with IPv4
    if (loopbackAddress instanceof Inet4Address) {
        return (Inet4Address) loopbackAddress;
    }/*from   w ww .ja va2  s.  com*/

    try {
        InetAddress[] addresses = InetAddress.getAllByName(loopbackAddress.getHostName());
        for (InetAddress inetAddress : addresses) {
            if (inetAddress instanceof Inet4Address) {
                return (Inet4Address) inetAddress;
            }
        }
    } catch (UnknownHostException e) {
        log.warn("Error while determining loopback addresses for " + loopbackAddress.getHostName(), e);
    }

    try {
        //keep looking for a IPv4 loopback address
        for (Enumeration<NetworkInterface> itfs = NetworkInterface.getNetworkInterfaces(); itfs
                .hasMoreElements();) {
            NetworkInterface itf = itfs.nextElement();
            if (itf.isLoopback()) {
                for (Enumeration<InetAddress> addresses = itf.getInetAddresses(); addresses
                        .hasMoreElements();) {
                    InetAddress address = addresses.nextElement();
                    if (address instanceof Inet4Address) {
                        return (Inet4Address) address;
                    }
                }
            }
        }
    } catch (SocketException e) {
        log.warn("Error while listing network interfaces", e);
    }

    return null;
}

---

From source file:codeOrchestra.lcs.license.ActivationReporter.java

private static String getFingerPrint() {
    StringBuilder resultSB = new StringBuilder();
    try {/*from   www. ja  va 2s  .co m*/
        for (final Enumeration<NetworkInterface> interfaces = NetworkInterface
                .getNetworkInterfaces(); interfaces.hasMoreElements();) {
            final NetworkInterface networkInterface = (NetworkInterface) interfaces.nextElement();
            if (networkInterface.isLoopback()) {
                continue;
            }

            byte[] mac = networkInterface.getHardwareAddress();
            if (mac == null) {
                continue;
            }

            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < mac.length; i++) {
                sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : ""));
            }

            if ("00-00-00-00-00-00-00-E0".equals(sb.toString())) {
                continue;
            }

            resultSB.append(sb);
            if (interfaces.hasMoreElements()) {
                resultSB.append("|");
            }
        }
    } catch (Exception e) {
        // ignore
    }

    String result = resultSB.toString();
    if (result.endsWith("|")) {
        return result.substring(0, result.length() - 1);
    }

    return result;
}

---

From source file:io.galeb.router.sync.HttpClient.java

private static String localIpsEncoded() {
    final List<String> ipList = new ArrayList<>();
    try {//from  w w w  . j  a v  a  2 s .  c om
        Enumeration<NetworkInterface> ifs = NetworkInterface.getNetworkInterfaces();
        while (ifs.hasMoreElements()) {
            NetworkInterface localInterface = ifs.nextElement();
            if (!localInterface.isLoopback() && localInterface.isUp()) {
                Enumeration<InetAddress> ips = localInterface.getInetAddresses();
                while (ips.hasMoreElements()) {
                    InetAddress ipaddress = ips.nextElement();
                    if (ipaddress instanceof Inet4Address) {
                        ipList.add(ipaddress.getHostAddress());
                        break;
                    }
                }
            }
        }
    } catch (Exception e) {
        LOGGER.error(ExceptionUtils.getStackTrace(e));
    }
    String ip = String.join("-", ipList);
    if (ip == null || "".equals(ip)) {
        ip = "undef-" + System.currentTimeMillis();
    }
    return ip.replaceAll("[:%]", "");
}

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From source file:org.openhab.binding.network.service.NetworkUtils.java

/**
 * Gets every IPv4 Address on each Interface except the loopback
 * The Address format is ip/subnet/*from  w  ww  .  j  ava  2 s  .co  m*/
 *
 * @return The collected IPv4 Addresses
 */
public static TreeSet<String> getInterfaceIPs() {
    TreeSet<String> interfaceIPs = new TreeSet<String>();

    try {
        // For each interface ...
        for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en
                .hasMoreElements();) {
            NetworkInterface networkInterface = en.nextElement();
            if (!networkInterface.isLoopback()) {

                // .. and for each address ...
                for (Iterator<InterfaceAddress> it = networkInterface.getInterfaceAddresses().iterator(); it
                        .hasNext();) {

                    // ... get IP and Subnet
                    InterfaceAddress interfaceAddress = it.next();
                    interfaceIPs.add(interfaceAddress.getAddress().getHostAddress() + "/"
                            + interfaceAddress.getNetworkPrefixLength());
                }
            }
        }
    } catch (SocketException e) {
    }

    return interfaceIPs;
}

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From source file:org.apache.zeppelin.interpreter.remote.RemoteInterpreterUtils.java

public static String findAvailableHostAddress() throws UnknownHostException, SocketException {
    InetAddress address = InetAddress.getLocalHost();
    if (address.isLoopbackAddress()) {
        for (NetworkInterface networkInterface : Collections.list(NetworkInterface.getNetworkInterfaces())) {
            if (!networkInterface.isLoopback()) {
                for (InterfaceAddress interfaceAddress : networkInterface.getInterfaceAddresses()) {
                    InetAddress a = interfaceAddress.getAddress();
                    if (a instanceof Inet4Address) {
                        return a.getHostAddress();
                    }//w w  w  .  ja  va 2s  . com
                }
            }
        }
    }
    return address.getHostAddress();
}

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From source file:com.vmware.identity.idm.CommonUtil.java

private static String findInetAddress(Predicate<InetAddress> match) throws SocketException {
    String ipAddress = null;// www . jav  a  2s . c o m
    Enumeration<NetworkInterface> it = NetworkInterface.getNetworkInterfaces();

    while ((ipAddress == null) && it.hasMoreElements()) {
        NetworkInterface iface = it.nextElement();
        if ((!iface.isLoopback()) && (iface.isUp())) {
            Enumeration<InetAddress> it2 = iface.getInetAddresses();

            while (it2.hasMoreElements()) {
                InetAddress addr = it2.nextElement();
                if (match.matches(addr)) {
                    ipAddress = addr.getHostAddress();
                    break;
                }
            }
        }
    }

    return ipAddress;
}

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