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:to.sven.androidrccar.host.communication.impl.SocketConnector.java

/**
 * Returns the first non-local IPv4 address of the device. 
 * @return IPv4 address as String or unknown, if no address is found.
 *//*from  w  w w .  j  a v  a  2s  .c  o m*/
private String getLocalIpAddress() {
    try {
        for (NetworkInterface iface : Collections.list(NetworkInterface.getNetworkInterfaces())) {
            for (InetAddress address : Collections.list(iface.getInetAddresses())) {
                if (!address.isLoopbackAddress() && InetAddressUtils.isIPv4Address(address.getHostAddress())) {
                    return address.getHostAddress().toString();
                }
            }
        }
    } catch (SocketException ex) {
        Log.e(LOG_TAG, ex.toString());
    }
    return dc.getContext().getString(android.R.string.unknownName);
}

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From source file:org.springframework.cloud.commons.util.InetUtils.java

public InetAddress findFirstNonLoopbackAddress() {
    InetAddress result = null;//from ww w .j  a  v  a  2  s. c  o m
    try {
        int lowest = Integer.MAX_VALUE;
        for (Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces(); nics
                .hasMoreElements();) {
            NetworkInterface ifc = nics.nextElement();
            if (ifc.isUp()) {
                log.trace("Testing interface: " + ifc.getDisplayName());
                if (ifc.getIndex() < lowest || result == null) {
                    lowest = ifc.getIndex();
                } else if (result != null) {
                    continue;
                }

                // @formatter:off
                if (!ignoreInterface(ifc.getDisplayName())) {
                    for (Enumeration<InetAddress> addrs = ifc.getInetAddresses(); addrs.hasMoreElements();) {
                        InetAddress address = addrs.nextElement();
                        if (address instanceof Inet4Address && !address.isLoopbackAddress()
                                && !ignoreAddress(address)) {
                            log.trace("Found non-loopback interface: " + ifc.getDisplayName());
                            result = address;
                        }
                    }
                }
                // @formatter:on
            }
        }
    } catch (IOException ex) {
        log.error("Cannot get first non-loopback address", ex);
    }

    if (result != null) {
        return result;
    }

    try {
        return InetAddress.getLocalHost();
    } catch (UnknownHostException e) {
        log.warn("Unable to retrieve localhost");
    }

    return null;
}

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From source file:org.apache.spark.simr.Simr.java

/**
 * @return The IP of the first network interface on this machine as a string, null in the case
 * of an exception from the underlying network interface.
 *///from ww w. j  a v  a2s  .c om
public String getLocalIP() {
    String ip;
    int pickIfaceNum = conf.getInt("simr_interface", 0);

    int currIface = 0;
    try {
        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements()) {
            NetworkInterface iface = interfaces.nextElement();

            if (iface.isLoopback() || !iface.isUp())
                continue;

            if (currIface++ >= pickIfaceNum) {
                Enumeration<InetAddress> addresses = iface.getInetAddresses();

                while (addresses.hasMoreElements()) {
                    InetAddress addr = addresses.nextElement();
                    if (addr instanceof Inet4Address) {
                        ip = addr.getHostAddress();
                        return ip;
                    }
                }
            }
        }
    } catch (SocketException e) {
        throw new RuntimeException(e);
    }
    return null;
}

---

From source file:com.zz.cluster4spring.localinfo.DefaultLocalNetworkInfoProvider.java

public List<InetAddress> getLocalAddresses(InetAddressAcceptor aAcceptor) throws SocketException {
    List<InetAddress> result = new ArrayList<InetAddress>();
    Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
    while (interfaces.hasMoreElements()) {
        NetworkInterface networkInterface = interfaces.nextElement();
        if (aAcceptor.acceptNetworkInterface(networkInterface)) {
            if (fLog.isInfoEnabled()) {
                String name = networkInterface.getName();
                String displayName = networkInterface.getDisplayName();
                fLog.info(MessageFormat.format(
                        "Discovered NetworkInterface - ACCEPTED. Name:[{0}]. Display Name:[{1}]", name,
                        displayName));//from   w  w  w.j  ava 2s .c o  m
            }
            collectInterfaceAddresses(networkInterface, result, aAcceptor);
        } else {
            if (fLog.isInfoEnabled()) {
                String name = networkInterface.getName();
                String displayName = networkInterface.getDisplayName();
                fLog.info(MessageFormat.format(
                        "Discovered NetworkInterface - SKIPPED. Name:[{0}]. Display Name:[{1}]", name,
                        displayName));
            }
        }
    }
    return result;
}

---

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.//from   w  w w  .  j av  a2 s .c om
 */
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;
}

---

From source file:com.cats.version.utils.Utils.java

public static String getLocalHostIp() {
    String regex = "[\\d]+.[\\d]+.[\\d]+.[\\d]+";
    Enumeration<?> e = null;
    try {//from w  w w.j a  va 2s. co m
        e = NetworkInterface.getNetworkInterfaces();
    } catch (SocketException e1) {
        e1.printStackTrace();
    }
    while (e.hasMoreElements()) {
        NetworkInterface n = (NetworkInterface) e.nextElement();
        Enumeration<?> ee = n.getInetAddresses();
        while (ee.hasMoreElements()) {
            InetAddress i = (InetAddress) ee.nextElement();
            String ip = i.getHostAddress();
            if (ip.matches(regex) && !ip.equals("127.0.0.1")) {
                return ip;
            }
        }
    }
    return null;
}

---

From source file:org.springframework.vault.authentication.MacAddressUserId.java

@Override
public String createUserId() {

    try {//from  www. java  2 s.  com

        NetworkInterface networkInterface = null;
        List<NetworkInterface> interfaces = Collections.list(NetworkInterface.getNetworkInterfaces());

        if (StringUtils.hasText(networkInterfaceHint)) {

            try {
                networkInterface = getNetworkInterface(Integer.parseInt(networkInterfaceHint), interfaces);
            } catch (NumberFormatException e) {
                networkInterface = getNetworkInterface((networkInterfaceHint), interfaces);
            }
        }

        if (networkInterface == null) {

            if (StringUtils.hasText(networkInterfaceHint)) {
                log.warn(String.format("Did not find a NetworkInterface applying hint %s",
                        networkInterfaceHint));
            }

            InetAddress localHost = InetAddress.getLocalHost();
            networkInterface = NetworkInterface.getByInetAddress(localHost);

            if (networkInterface == null) {
                throw new IllegalStateException(
                        String.format("Cannot determine NetworkInterface for %s", localHost));
            }
        }

        byte[] mac = networkInterface.getHardwareAddress();
        if (mac == null) {
            throw new IllegalStateException(
                    String.format("Network interface %s has no hardware address", networkInterface.getName()));
        }

        return Sha256.toSha256(Sha256.toHexString(mac));
    } catch (IOException e) {
        throw new IllegalStateException(e);
    }
}

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From source file:de.madvertise.android.sdk.MadUtil.java

/**
 * Fetch the address of the enabled interface
 * /* w w w .j  a v a2  s. com*/
 * @return ip address as string
 */
protected static String getLocalIpAddress() {
    try {
        for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en
                .hasMoreElements();) {
            NetworkInterface intf = en.nextElement();
            for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                InetAddress inetAddress = enumIpAddr.nextElement();
                if (!inetAddress.isLoopbackAddress()) {
                    return inetAddress.getHostAddress().toString();
                }
            }
        }
    } catch (SocketException ex) {
        if (PRINT_LOG)
            Log.d(MadUtil.LOG, ex.toString());
    }
    return "";
}

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From source file:org.trafodion.rest.zookeeper.ZkQuorumPeer.java

static void writeMyID(Properties properties) throws IOException {
    long myId = -1;

    Configuration conf = RestConfiguration.create();
    String myAddress = Strings//  www .j  av a  2s  .c  om
            .domainNamePointerToHostName(DNS.getDefaultHost(conf.get("rest.zookeeper.dns.interface", "default"),
                    conf.get("rest.zookeeper.dns.nameserver", "default")));

    List<String> ips = new ArrayList<String>();

    // Add what could be the best (configured) match
    ips.add(myAddress.contains(".") ? myAddress : StringUtils.simpleHostname(myAddress));

    // For all nics get all hostnames and IPs
    Enumeration<?> nics = NetworkInterface.getNetworkInterfaces();
    while (nics.hasMoreElements()) {
        Enumeration<?> rawAdrs = ((NetworkInterface) nics.nextElement()).getInetAddresses();
        while (rawAdrs.hasMoreElements()) {
            InetAddress inet = (InetAddress) rawAdrs.nextElement();
            ips.add(StringUtils.simpleHostname(inet.getHostName()));
            ips.add(inet.getHostAddress());
        }
    }

    for (Entry<Object, Object> entry : properties.entrySet()) {
        String key = entry.getKey().toString().trim();
        String value = entry.getValue().toString().trim();
        if (key.startsWith("server.")) {
            int dot = key.indexOf('.');
            long id = Long.parseLong(key.substring(dot + 1));
            String[] parts = value.split(":");
            String address = parts[0];
            if (addressIsLocalHost(address) || ips.contains(address)) {
                myId = id;
                break;
            }
        }
    }

    // Set the max session timeout from the provided client-side timeout
    properties.setProperty("maxSessionTimeout", conf.get("zookeeper.session.timeout", "180000"));

    if (myId == -1) {
        throw new IOException(
                "Could not find my address: " + myAddress + " in list of ZooKeeper quorum servers");
    }

    String dataDirStr = properties.get("dataDir").toString().trim();
    File dataDir = new File(dataDirStr);
    if (!dataDir.isDirectory()) {
        if (!dataDir.mkdirs()) {
            throw new IOException("Unable to create data dir " + dataDir);
        }
    }

    File myIdFile = new File(dataDir, "myid");
    PrintWriter w = new PrintWriter(myIdFile);
    w.println(myId);
    w.close();
}

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From source file:org.openhab.io.hueemulation.internal.HueEmulationUpnpServer.java

@Override
public void run() {
    MulticastSocket recvSocket = null;
    // since jupnp shares port 1900, lets use a different port to send UDP packets on just to be safe.
    DatagramSocket sendSocket = null;
    byte[] buf = new byte[1000];
    DatagramPacket recv = new DatagramPacket(buf, buf.length);
    while (running) {
        try {/*from   w  ww  .  j a v  a 2s. c  o  m*/
            if (discoveryIp != null && discoveryIp.trim().length() > 0) {
                address = InetAddress.getByName(discoveryIp);
            } else {
                Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
                while (interfaces.hasMoreElements()) {
                    NetworkInterface ni = interfaces.nextElement();
                    Enumeration<InetAddress> addresses = ni.getInetAddresses();
                    while (addresses.hasMoreElements()) {
                        InetAddress addr = addresses.nextElement();
                        if (addr instanceof Inet4Address && !addr.isLoopbackAddress()) {
                            address = addr;
                            break;
                        }
                    }
                }
            }
            InetSocketAddress socketAddr = new InetSocketAddress(MULTI_ADDR, UPNP_PORT_RECV);
            recvSocket = new MulticastSocket(UPNP_PORT_RECV);
            recvSocket.joinGroup(socketAddr, NetworkInterface.getByInetAddress(address));
            sendSocket = new DatagramSocket();
            while (running) {
                recvSocket.receive(recv);
                if (recv.getLength() > 0) {
                    String data = new String(recv.getData());
                    logger.trace("Got SSDP Discovery packet from {}:{}", recv.getAddress().getHostAddress(),
                            recv.getPort());
                    if (data.startsWith("M-SEARCH")) {
                        String msg = String.format(discoString, "http://" + address.getHostAddress().toString()
                                + ":" + System.getProperty("org.osgi.service.http.port") + discoPath, usn);
                        DatagramPacket response = new DatagramPacket(msg.getBytes(), msg.length(),
                                recv.getAddress(), recv.getPort());
                        try {
                            logger.trace("Sending to {} : {}", recv.getAddress().getHostAddress(), msg);
                            sendSocket.send(response);
                        } catch (IOException e) {
                            logger.error("Could not send UPNP response", e);
                        }
                    }
                }
            }
        } catch (SocketException e) {
            logger.error("Socket error with UPNP server", e);
        } catch (IOException e) {
            logger.error("IO Error with UPNP server", e);
        } finally {
            IOUtils.closeQuietly(recvSocket);
            IOUtils.closeQuietly(sendSocket);
            if (running) {
                try {
                    Thread.sleep(3000);
                } catch (InterruptedException e) {
                }
            }
        }
    }
}

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