Example usage for java.net NetworkInterface isUp

Introduction

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

Prototype

public boolean isUp() throws SocketException 

Source Link

Document

Returns whether a network interface is up and running.

Usage

From source file:edu.usc.pgroup.floe.utils.Utils.java

/**
 * returns the canonical host name. This assumes a unique host name for
 * each machine in the cluster does not apply.
 * FixMe: In local cloud environment (local eucalyptus in system mode)
 * where the DNS server is not running, this might be an issue.
 * @return The first IPv4 address found for any interface that is up and
 * running.//w w w.  j a  va 2 s.co  m
 */
public static String getIpAddress() {
    String ip = null;
    try {
        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        LOGGER.error("Getting ip");

        while (interfaces.hasMoreElements()) {
            LOGGER.error("Next iface");
            NetworkInterface current = interfaces.nextElement();
            if (!current.isUp() || current.isLoopback() || current.isVirtual()) {
                continue;
            }
            Enumeration<InetAddress> addresses = current.getInetAddresses();
            while (addresses.hasMoreElements()) {
                InetAddress currentAddr = addresses.nextElement();
                if (currentAddr.isLoopbackAddress() || (currentAddr instanceof Inet6Address)) {
                    continue;
                }
                ip = currentAddr.getHostAddress();
            }
        }
    } catch (SocketException e) {
        LOGGER.error("Error occurred while retrieving hostname" + e.getMessage());
        throw new RuntimeException("Error occurred while " + "retrieving hostname" + e.getMessage());
    }
    return ip;
}

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From source file:com.petalmd.armor.AbstractUnitTest.java

public static String getNonLocalhostAddress() {
    try {//from   w  w w .  j ava 2  s.  c o  m
        for (final Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en
                .hasMoreElements();) {
            final NetworkInterface intf = en.nextElement();

            if (intf.isLoopback() || !intf.isUp()) {
                continue;
            }

            for (final Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr
                    .hasMoreElements();) {

                final InetAddress ia = enumIpAddr.nextElement();

                if (ia.isLoopbackAddress() || ia instanceof Inet6Address) {
                    continue;
                }

                return ia.getHostAddress();
            }
        }
    } catch (final SocketException e) {
        throw new RuntimeException(e);

    }

    System.out.println("ERROR: No non-localhost address available, will use localhost");
    return "localhost";
}

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From source file:com.t_oster.visicut.misc.Helper.java

public static List<String> findVisiCamInstances() {
    List<String> result = new LinkedList<String>();
    // Find the server using UDP broadcast
    try {/*from  w w  w.ja v a2 s.  c o m*/
        //Open a random port to send the package
        DatagramSocket c = new DatagramSocket();
        c.setBroadcast(true);

        byte[] sendData = "VisiCamDiscover".getBytes();

        //Try the 255.255.255.255 first
        try {
            DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length,
                    InetAddress.getByName("255.255.255.255"), 8888);
            c.send(sendPacket);
        } catch (Exception e) {
        }

        // Broadcast the message over all the network interfaces
        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements()) {
            NetworkInterface networkInterface = interfaces.nextElement();
            if (networkInterface.isLoopback() || !networkInterface.isUp()) {
                continue; // Don't want to broadcast to the loopback interface
            }
            for (InterfaceAddress interfaceAddress : networkInterface.getInterfaceAddresses()) {
                InetAddress broadcast = interfaceAddress.getBroadcast();
                if (broadcast == null) {
                    continue;
                }
                // Send the broadcast package!
                try {
                    DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, broadcast, 8888);
                    c.send(sendPacket);
                } catch (Exception e) {
                }
            }
        }
        //Wait for a response
        byte[] recvBuf = new byte[15000];
        c.setSoTimeout(3000);
        while (true) {
            DatagramPacket receivePacket = new DatagramPacket(recvBuf, recvBuf.length);
            try {
                c.receive(receivePacket);
                //Check if the message is correct
                String message = new String(receivePacket.getData()).trim();
                //Close the port!
                c.close();
                if (message.startsWith("http")) {
                    result.add(message);
                }
            } catch (SocketTimeoutException e) {
                break;
            }
        }
    } catch (IOException ex) {
    }
    return result;
}

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From source file:otsopack.commons.network.coordination.spacemanager.HttpSpaceManager.java

private static boolean isUp(NetworkInterface netIf) throws SocketException {
    try {/*from w w w  .j  av  a 2 s .  c  o m*/
        // In Android <= 8, the method isUp is not available. Therefore, this code will compile
        // but will not work. We check if it's available or not before calling it
        NetworkInterface.class.getDeclaredMethod("isUp");
    } catch (SecurityException e) {
        // We can't know: we assume that it's up
        return true;
    } catch (NoSuchMethodException e) {
        // We can't know: we assume that it's up
        return true;
    }
    return netIf.isUp();
}

---

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

/**
 * Returns the IP address determined from the network interfaces (using
 * the IP address of the one with a proper host name).
 *
 * @return       the IP address// ww  w . j  a v  a  2s  .  c  o  m
 */
public static synchronized String getIPFromNetworkInterface() {
    String result;
    List<String> list;
    Enumeration<NetworkInterface> enmI;
    NetworkInterface intf;
    Enumeration<InetAddress> enmA;
    InetAddress addr;
    boolean found;

    result = null;

    if (m_IPNetworkInterface == 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.getHostAddress());
                    if (addr.getHostName().indexOf(':') == -1) {
                        result = addr.getHostAddress();
                        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_IPNetworkInterface = result;
    } else {
        result = m_IPNetworkInterface;
    }

    return result;
}

---

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  ww  w  . jav 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;
}

---

From source file:eu.stratosphere.nephele.discovery.DiscoveryService.java

/**
 * Returns the set of broadcast addresses available to the network interfaces of this host. In case of IPv6 the set
 * contains the IPv6 multicast address to reach all nodes on the local link. Moreover, all addresses of the loopback
 * interfaces are added to the set./* www.jav  a 2  s. c o m*/
 * 
 * @return (possibly empty) set of broadcast addresses reachable by this host
 */
private static Set<InetAddress> getBroadcastAddresses() {

    final Set<InetAddress> broadcastAddresses = new HashSet<InetAddress>();

    // get all network interfaces
    Enumeration<NetworkInterface> ie = null;
    try {
        ie = NetworkInterface.getNetworkInterfaces();
    } catch (SocketException e) {
        LOG.error("Could not collect network interfaces of host", e);
        return broadcastAddresses;
    }

    while (ie.hasMoreElements()) {
        NetworkInterface nic = ie.nextElement();
        try {
            if (!nic.isUp()) {
                continue;
            }

            if (nic.isLoopback()) {
                for (InterfaceAddress adr : nic.getInterfaceAddresses()) {
                    broadcastAddresses.add(adr.getAddress());
                }
            } else {

                // check all IPs bound to network interfaces
                for (InterfaceAddress adr : nic.getInterfaceAddresses()) {

                    if (adr == null) {
                        continue;
                    }

                    // collect all broadcast addresses
                    if (USE_IPV6) {
                        try {
                            final InetAddress interfaceAddress = adr.getAddress();
                            if (interfaceAddress instanceof Inet6Address) {
                                final Inet6Address ipv6Address = (Inet6Address) interfaceAddress;
                                final InetAddress multicastAddress = InetAddress.getByName(IPV6MULTICASTADDRESS
                                        + "%" + Integer.toString(ipv6Address.getScopeId()));
                                broadcastAddresses.add(multicastAddress);
                            }

                        } catch (UnknownHostException e) {
                            LOG.error(e);
                        }
                    } else {
                        final InetAddress broadcast = adr.getBroadcast();
                        if (broadcast != null) {
                            broadcastAddresses.add(broadcast);
                        }
                    }
                }
            }

        } catch (SocketException e) {
            LOG.error("Socket exception when checking " + nic.getName() + ". " + "Ignoring this device.", e);
        }
    }

    return broadcastAddresses;
}

---

From source file:terrastore.communication.NodeConfiguration.java

private String getPublishAddresses() throws Exception {
    Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
    StringBuilder result = new StringBuilder();
    while (nics != null && nics.hasMoreElements()) {
        NetworkInterface nic = nics.nextElement();
        if (nic.isUp() && !nic.isLoopback() && !nic.isVirtual() && nic.getInetAddresses().hasMoreElements()) {
            Enumeration<InetAddress> addresses = nic.getInetAddresses();
            while (addresses.hasMoreElements()) {
                if (result.length() > 0) {
                    result.append(",");
                }/*  w  ww . jav  a2s  . c o m*/
                result.append(addresses.nextElement().getHostAddress());
            }
        }
    }
    return result.toString();
}

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From source file:org.openhab.binding.zway.internal.discovery.ZWayBridgeDiscoveryService.java

private void scan() {
    logger.debug("Starting scan for Z-Way Server");

    ValidateIPV4 validator = new ValidateIPV4();

    try {/*w  w w  .jav a  2s.co m*/
        Enumeration<NetworkInterface> enumNetworkInterface = NetworkInterface.getNetworkInterfaces();
        while (enumNetworkInterface.hasMoreElements()) {
            NetworkInterface networkInterface = enumNetworkInterface.nextElement();
            if (networkInterface.isUp() && !networkInterface.isVirtual() && !networkInterface.isLoopback()) {
                for (InterfaceAddress address : networkInterface.getInterfaceAddresses()) {
                    if (validator.isValidIPV4(address.getAddress().getHostAddress())) {
                        String ipAddress = address.getAddress().getHostAddress();
                        Short prefix = address.getNetworkPrefixLength();

                        logger.debug("Scan IP address for Z-Way Server: {}", ipAddress);

                        // Search on localhost first
                        scheduler.execute(new ZWayServerScan(ipAddress));

                        String subnet = ipAddress + "/" + prefix;
                        SubnetUtils utils = new SubnetUtils(subnet);
                        String[] addresses = utils.getInfo().getAllAddresses();

                        for (String addressInSubnet : addresses) {
                            scheduler.execute(new ZWayServerScan(addressInSubnet));
                        }
                    }
                }
            }
        }
    } catch (SocketException e) {
        logger.warn("Error occurred while searching Z-Way servers ({})", e.getMessage());
    }
}

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From source file:org.openhab.binding.vera.internal.discovery.VeraBridgeDiscoveryService.java

private void scan() {
    logger.debug("Starting scan for Vera controller");

    ValidateIPV4 validator = new ValidateIPV4();

    try {//ww w  . j  a v  a 2s  . c  o m
        Enumeration<NetworkInterface> enumNetworkInterface = NetworkInterface.getNetworkInterfaces();
        while (enumNetworkInterface.hasMoreElements()) {
            NetworkInterface networkInterface = enumNetworkInterface.nextElement();
            if (networkInterface.isUp() && !networkInterface.isVirtual() && !networkInterface.isLoopback()) {
                for (InterfaceAddress address : networkInterface.getInterfaceAddresses()) {
                    if (validator.isValidIPV4(address.getAddress().getHostAddress())) {
                        String ipAddress = address.getAddress().getHostAddress();
                        Short prefix = address.getNetworkPrefixLength();

                        logger.debug("Scan IP address for Vera Controller: {}", ipAddress);

                        String subnet = ipAddress + "/" + prefix;
                        SubnetUtils utils = new SubnetUtils(subnet);
                        String[] addresses = utils.getInfo().getAllAddresses();

                        for (String addressInSubnet : addresses) {
                            scheduler.execute(new VeraControllerScan(addressInSubnet));
                        }
                    }
                }
            }
        }
    } catch (SocketException e) {
        logger.warn("Error occurred while searching Vera controller: ", e);
    }
}

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