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:stargate.commons.utils.IPUtils.java

public static Collection<String> getHostAddress() {
    if (!cached_host_addr.isEmpty()) {
        return Collections.unmodifiableCollection(cached_host_addr);
    } else {/*from  w  ww  .  j a v a 2 s.  c  o  m*/
        try {
            Enumeration e = NetworkInterface.getNetworkInterfaces();
            while (e.hasMoreElements()) {
                NetworkInterface n = (NetworkInterface) e.nextElement();
                Enumeration ee = n.getInetAddresses();
                while (ee.hasMoreElements()) {
                    InetAddress i = (InetAddress) ee.nextElement();

                    String hostAddress = i.getHostAddress();
                    if (isProperHostAddress(hostAddress)) {
                        if (!cached_host_addr.contains(hostAddress)) {
                            cached_host_addr.add(hostAddress);
                        }
                    }

                    String hostName = i.getHostName();
                    if (isProperHostAddress(hostName)) {
                        if (!cached_host_addr.contains(hostName)) {
                            cached_host_addr.add(hostName);
                        }
                    }

                    String canonicalHostName = i.getCanonicalHostName();
                    if (isProperHostAddress(canonicalHostName)) {
                        if (!cached_host_addr.contains(canonicalHostName)) {
                            cached_host_addr.add(canonicalHostName);
                        }
                    }
                }
            }
        } catch (SocketException ex) {
            LOG.error("Exception occurred while scanning local interfaces", ex);
        }

        return Collections.unmodifiableCollection(cached_host_addr);
    }
}

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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();
                    }/*from ww w  .  java 2  s .c o  m*/
                }
            }
        }
    }
    return address.getHostAddress();
}

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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  www.j  a  v  a 2  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;
}

---

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

private static String localIpsEncoded() {
    final List<String> ipList = new ArrayList<>();
    try {//w w  w  .  j av  a2  s .  co  m
        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("[:%]", "");
}

---

From source file:net.sourceforge.subsonic.util.Util.java

/**
 * Returns the local IP address./*from w ww  . j a  v a2 s  .c o  m*/
 * @return The local IP, or the loopback address (127.0.0.1) if not found.
 */
public static String getLocalIpAddress() {
    try {

        // Try the simple way first.
        InetAddress address = InetAddress.getLocalHost();
        if (!address.isLoopbackAddress()) {
            return address.getHostAddress();
        }

        // Iterate through all network interfaces, looking for a suitable IP.
        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements()) {
            NetworkInterface iface = interfaces.nextElement();
            Enumeration<InetAddress> addresses = iface.getInetAddresses();
            while (addresses.hasMoreElements()) {
                InetAddress addr = addresses.nextElement();
                if (addr instanceof Inet4Address && !addr.isLoopbackAddress()) {
                    return addr.getHostAddress();
                }
            }
        }

    } catch (Throwable x) {
        LOG.warn("Failed to resolve local IP address.", x);
    }

    return "127.0.0.1";
}

---

From source file:ai.general.interbot.NetworkInterfaceInfo.java

/**
 * Collects information about the local network interfaces and returns the information as an
 * array of NetworkInterfaceInfo objects.
 *
 * @return Information about the local network interfaces.
 *//*  w  w w  .  jav a 2  s .c om*/
public static ArrayList<NetworkInterfaceInfo> queryAll() {
    ArrayList<NetworkInterfaceInfo> infos = new ArrayList<NetworkInterfaceInfo>();
    try {
        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements()) {
            NetworkInterface iface = interfaces.nextElement();
            String name = iface.getName();
            if (name.startsWith("eth") || name.startsWith("wlan")) {
                NetworkInterfaceInfo info = new NetworkInterfaceInfo(name);
                Enumeration<InetAddress> addresses = iface.getInetAddresses();
                while (addresses.hasMoreElements()) {
                    InetAddress address = addresses.nextElement();
                    if (address instanceof Inet4Address) {
                        info.getAddresses()
                                .add(new IpAddress(IpAddress.Version.IPv4, inetAddressToString(address)));
                    } else if (address instanceof Inet6Address) {
                        info.getAddresses()
                                .add(new IpAddress(IpAddress.Version.IPv6, inetAddressToString(address)));
                    }
                }
                if (info.getAddresses().size() > 0) {
                    infos.add(info);
                }
            }
        }
    } catch (SocketException e) {
    }
    return infos;
}

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From source file:com.chiralBehaviors.slp.hive.configuration.MulticastConfiguration.java

public NetworkInterface getNetworkInterface() throws SocketException {
    if (networkInterface == null) {
        for (Enumeration<NetworkInterface> intfs = NetworkInterface.getNetworkInterfaces(); intfs
                .hasMoreElements();) {//from  ww  w  . j  av  a 2s. com
            NetworkInterface intf = intfs.nextElement();
            if (intf.supportsMulticast()) {
                return intf;
            }
        }
        throw new IllegalStateException("No interface supporting multicast was discovered");
    }
    NetworkInterface iface = NetworkInterface.getByName(networkInterface);
    if (iface == null) {
        throw new IllegalArgumentException(
                String.format("Cannot find network interface: %s ", networkInterface));
    }
    return iface;
}

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From source file:zipkin.server.brave.BraveConfiguration.java

/** This gets the lanIP without trying to lookup its name. */
// http://stackoverflow.com/questions/8765578/get-local-ip-address-without-connecting-to-the-internet
@Bean//w ww .j a v a  2 s.  c  o  m
@Scope
Endpoint local(@Value("${server.port:9411}") int port) {
    Endpoint.Builder builder = Endpoint.builder().serviceName("zipkin-server").port(port == -1 ? 0 : port);
    try {
        byte[] address = Collections.list(NetworkInterface.getNetworkInterfaces()).stream()
                .flatMap(i -> Collections.list(i.getInetAddresses()).stream())
                .filter(ip -> ip.isSiteLocalAddress()).findAny().get().getAddress();
        if (address.length == 4) {
            builder.ipv4(ByteBuffer.wrap(address).getInt());
        } else if (address.length == 16) {
            builder.ipv6(address);
        }
    } catch (Exception ignored) {
        builder.ipv4(127 << 24 | 1);
    }
    return builder.build();
}

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From source file:at.tugraz.ist.akm.networkInterface.WifiIpAddress.java

public String readIp4ApAddress() {
    try {//from   w w  w .java 2  s  .c o  m
        for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en
                .hasMoreElements();) {
            NetworkInterface intf = en.nextElement();
            if (intf.getName().contains("wlan")) {
                for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr
                        .hasMoreElements();) {
                    InetAddress inetAddress = enumIpAddr.nextElement();
                    if (!inetAddress.isLoopbackAddress() && (inetAddress.getAddress().length == 4)) {
                        mLog.debug("found AP address [" + inetAddress.getHostAddress() + "]");
                        return inetAddress.getHostAddress();
                    }
                }
            }
        }
    } catch (SocketException ex) {
        mLog.debug("failed to read ip address in access point mode");
    }
    return null;
}

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From source file:com.commonsware.android.webserver.simple.WebServerService.java

private void raiseStartedEvent() {
    ServerStartedEvent event = new ServerStartedEvent();

    try {//w w w  .  j  ava  2  s. co  m
        for (Enumeration<NetworkInterface> enInterfaces = NetworkInterface.getNetworkInterfaces(); enInterfaces
                .hasMoreElements();) {
            NetworkInterface ni = enInterfaces.nextElement();

            for (Enumeration<InetAddress> enAddresses = ni.getInetAddresses(); enAddresses.hasMoreElements();) {
                InetAddress addr = enAddresses.nextElement();

                if (addr instanceof Inet4Address) {
                    event.addUrl("http://" + addr.getHostAddress() + ":4999");
                }
            }
        }
    } catch (SocketException e) {
        Log.e(getClass().getSimpleName(), "Exception in IP addresses", e);
    }

    EventBus.getDefault().removeAllStickyEvents();
    EventBus.getDefault().postSticky(event);
}

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