Example usage for java.net InetAddress getHostName

Introduction

In this page you can find the example usage for java.net InetAddress getHostName.

Prototype

public String getHostName() 

Source Link

Document

Gets the host name for this IP address.

Usage

From source file:net.grinder.util.NetworkUtil.java

/**
 * Get local host name by connecting to a server.
 * //w  ww  .  ja  va2s.c  o  m
 * @param byConnecting
 *            the server address to connect.
 * @param port
 *            the port to connect
 * @return localhost name. if fails, return "localhost"
 */
public static String getLocalHostName(String byConnecting, int port) {
    InetAddress addr = getLocalInetAddress(byConnecting, port);
    if (addr != null) {
        return addr.getHostName();
    } else {
        return "localhost";
    }
}

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From source file:org.ntpsync.util.NtpSyncUtils.java

/**
 * Queries NTP server using UDP to get offset
 * //from   w ww .j a v a2s .  c  o m
 * @param ntpServerHostname
 * @return offset
 * @throws IOException
 *             , SocketException
 */
public static long query(String ntpServerHostname) throws IOException, SocketException {
    NTPUDPClient client = new NTPUDPClient();
    // We want to timeout if a response takes longer than 10 seconds
    client.setDefaultTimeout(10000);

    TimeInfo info = null;
    try {
        client.open();

        InetAddress hostAddr = InetAddress.getByName(ntpServerHostname);
        Log.d(Constants.TAG,
                "Trying to get time from " + hostAddr.getHostName() + "/" + hostAddr.getHostAddress());

        info = client.getTime(hostAddr);
    } finally {
        client.close();
    }

    // compute offset/delay if not already done
    info.computeDetails();

    return info.getOffset();
}

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From source file:com.collabnet.tracker.common.httpClient.TrackerHttpSender.java

private static Credentials getCredentials(final String username, final String password,
        final InetAddress address) {
    int i = username.indexOf("\\");
    if (i > 0 && i < username.length() - 1 && address != null) {
        return new NTCredentials(username.substring(i + 1), password, address.getHostName(),
                username.substring(0, i));
    } else {/*from  www .  j a v  a  2s.  c o m*/
        return new UsernamePasswordCredentials(username, password);
    }
}

---

From source file:com.alibaba.jstorm.utils.NetWorkUtils.java

public static String ip2Host(String ip) {
    InetAddress address = null;
    try {/*from  w  w  w .  j  ava  2s .com*/
        address = InetAddress.getByName(ip);
    } catch (UnknownHostException e) {
        LOG.warn("NetWorkUtil can't transfer ip(" + ip + ") to hostname, return ip", e);
        return ip;
    }
    return address.getHostName();
}

---

From source file:org.ntpsync.util.NtpSyncUtils.java

/**
 * Process <code>TimeInfo</code> object and print its details.
 * /* ww  w . j a va 2  s . c o m*/
 * @param info
 *            <code>TimeInfo</code> object.
 */
public static String processResponse(TimeInfo info, Context context) {
    String output = "";

    NtpV3Packet message = info.getMessage();
    int stratum = message.getStratum();
    String refType;
    if (stratum <= 0) {
        refType = context.getString(R.string.detailed_query_unspecified);
    } else if (stratum == 1) {
        refType = context.getString(R.string.detailed_query_primary_reference); // GPS, radio
                                                                                // clock, etc.
    } else {
        refType = context.getString(R.string.detailed_query_secondary_reference);
    }
    // stratum should be 0..15...
    output += "<p><b>" + context.getString(R.string.detailed_query_server) + "</b><br/>"
            + context.getString(R.string.detailed_query_stratum) + " " + stratum + " " + refType;

    int version = message.getVersion();
    int li = message.getLeapIndicator();
    output += "<br/>" + context.getString(R.string.detailed_query_leap) + " " + li + "<br/>"
            + context.getString(R.string.detailed_query_version) + " " + version + "<br/>"
            + context.getString(R.string.detailed_query_precision) + " " + message.getPrecision();

    output += "<br/>" + context.getString(R.string.detailed_query_mode) + " " + message.getModeName() + " ("
            + message.getMode() + ")";
    int poll = message.getPoll();
    // poll value typically btwn MINPOLL (4) and MAXPOLL (14)
    output += "<br/>" + context.getString(R.string.detailed_query_poll) + " "
            + (poll <= 0 ? 1 : (int) Math.pow(2, poll)) + " "
            + context.getString(R.string.detailed_query_seconds) + " (2 ** " + poll + ")";
    double disp = message.getRootDispersionInMillisDouble();
    output += "<br/>" + context.getString(R.string.detailed_query_rootdelay) + " "
            + numberFormat.format(message.getRootDelayInMillisDouble()) + "<br/>"
            + context.getString(R.string.detailed_query_rootdispersion) + " " + numberFormat.format(disp);

    int refId = message.getReferenceId();
    String refAddr = NtpUtils.getHostAddress(refId);
    String refName = null;
    if (refId != 0) {
        if (refAddr.equals("127.127.1.0")) {
            refName = "LOCAL"; // This is the ref address for the Local Clock
        } else if (stratum >= 2) {
            // If reference id has 127.127 prefix then it uses its own reference clock
            // defined in the form 127.127.clock-type.unit-num (e.g. 127.127.8.0 mode 5
            // for GENERIC DCF77 AM; see refclock.htm from the NTP software distribution.
            if (!refAddr.startsWith("127.127")) {
                try {
                    InetAddress addr = InetAddress.getByName(refAddr);
                    String name = addr.getHostName();
                    if (name != null && !name.equals(refAddr)) {
                        refName = name;
                    }
                } catch (UnknownHostException e) {
                    // some stratum-2 servers sync to ref clock device but fudge stratum level
                    // higher... (e.g. 2)
                    // ref not valid host maybe it's a reference clock name?
                    // otherwise just show the ref IP address.
                    refName = NtpUtils.getReferenceClock(message);
                }
            }
        } else if (version >= 3 && (stratum == 0 || stratum == 1)) {
            refName = NtpUtils.getReferenceClock(message);
            // refname usually have at least 3 characters (e.g. GPS, WWV, LCL, etc.)
        }
        // otherwise give up on naming the beast...
    }
    if (refName != null && refName.length() > 1) {
        refAddr += " (" + refName + ")";
    }
    output += "<p><b>" + context.getString(R.string.detailed_query_reference_identifier) + "</b><br/>" + refAddr
            + "</p>";

    TimeStamp refNtpTime = message.getReferenceTimeStamp();
    output += "<p><b>" + context.getString(R.string.detailed_query_reference_timestamp) + "</b><br/>"
            + refNtpTime.toDateString() + "</p>";

    // Originate Time is time request sent by client (t1)
    TimeStamp origNtpTime = message.getOriginateTimeStamp();
    output += "<p><b>" + context.getString(R.string.detailed_query_originate_timestamp) + "</b><br/>"
            + origNtpTime.toDateString() + "</p>";

    long destTime = info.getReturnTime();
    // Receive Time is time request received by server (t2)
    TimeStamp rcvNtpTime = message.getReceiveTimeStamp();
    output += "<p><b>" + context.getString(R.string.detailed_query_receive_timestamp) + "</b><br/>"
            + rcvNtpTime.toDateString() + "</p>";

    // Transmit time is time reply sent by server (t3)
    TimeStamp xmitNtpTime = message.getTransmitTimeStamp();
    output += "<p><b>" + context.getString(R.string.detailed_query_transmit_timestamp) + "</b><br/>"
            + xmitNtpTime.toDateString() + "</p>";

    // Destination time is time reply received by client (t4)
    TimeStamp destNtpTime = TimeStamp.getNtpTime(destTime);
    output += "<p><b>" + context.getString(R.string.detailed_query_destination_timestamp) + "</b><br/>"
            + destNtpTime.toDateString() + "</p>";

    info.computeDetails(); // compute offset/delay if not already done
    Long offsetValue = info.getOffset();
    Long delayValue = info.getDelay();
    String delay = (delayValue == null) ? "N/A" : delayValue.toString();
    String offset = (offsetValue == null) ? "N/A" : offsetValue.toString();

    // offset in ms
    output += "<p><b>" + context.getString(R.string.detailed_query_computed_offset) + "</b><br/>"
            + context.getString(R.string.detailed_query_roundtrip_delay) + " " + delay + "<br/>"
            + context.getString(R.string.detailed_query_clock_offset) + " " + offset + "</p>";

    return output;
}

---

From source file:com.eviware.soapui.impl.wsdl.support.http.ProxyUtils.java

private static String nslookup(String s, boolean ip) {

    InetAddress host;
    String address;/*from  w  w w. j  ava  2 s  .  c  om*/

    // get the bytes of the IP address
    try {
        host = InetAddress.getByName(s);
        if (ip)
            address = host.getHostAddress();
        else
            address = host.getHostName();
    } catch (UnknownHostException ue) {
        return s; // no host
    }

    return address;

}

---

From source file:SocketFetcher.java

/**
 * Start TLS on an existing socket. Supports the "STARTTLS" command in many
 * protocols.//from w w w  . j  ava2  s  . c o  m
 */
public static Socket startTLS(Socket socket, Properties props, String prefix) throws IOException {
    InetAddress a = socket.getInetAddress();
    String host = a.getHostName();
    int port = socket.getPort();
    // System.out.println("SocketFetcher: startTLS host " + host + ", port " +
    // port);

    try {
        SSLSocketFactory ssf;
        String sfClass = props.getProperty(prefix + ".socketFactory.class", null);
        SocketFactory sf = getSocketFactory(sfClass);
        if (sf != null && sf instanceof SSLSocketFactory)
            ssf = (SSLSocketFactory) sf;
        else
            ssf = (SSLSocketFactory) SSLSocketFactory.getDefault();
        socket = ssf.createSocket(socket, host, port, true);
        configureSSLSocket(socket, props, prefix);
    } catch (Exception ex) {
        if (ex instanceof InvocationTargetException) {
            Throwable t = ((InvocationTargetException) ex).getTargetException();
            if (t instanceof Exception)
                ex = (Exception) t;
        }
        if (ex instanceof IOException)
            throw (IOException) ex;
        // wrap anything else before sending it on
        IOException ioex = new IOException(
                "Exception in startTLS: host " + host + ", port " + port + "; Exception: " + ex);
        throw ioex;
    }
    return socket;
}

---

From source file:org.apache.hadoop.hbase.zookeeper.HQuorumPeer.java

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

    Configuration conf = HBaseConfiguration.create();
    String myAddress = DNS.getDefaultHost(conf.get("hbase.zookeeper.dns.interface", "default"),
            conf.get("hbase.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());
        }/*from  w  w w  .  j a  v a 2  s .  c o  m*/
    }

    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;
            }
        }
    }

    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();
}

---

From source file:SocketFetcher.java

/**
 * Start TLS on an existing socket./*from   w  ww .jav a 2  s  .com*/
 * Supports the "STARTTLS" command in many protocols.
 */
public static Socket startTLS(Socket socket, Properties props, String prefix) throws IOException {
    InetAddress a = socket.getInetAddress();
    String host = a.getHostName();
    int port = socket.getPort();
    //System.out.println("SocketFetcher: startTLS host " + host + ", port " + port);

    try {
        SSLSocketFactory ssf;
        String sfClass = props.getProperty(prefix + ".socketFactory.class", null);
        SocketFactory sf = getSocketFactory(sfClass);
        if (sf != null && sf instanceof SSLSocketFactory)
            ssf = (SSLSocketFactory) sf;
        else
            ssf = (SSLSocketFactory) SSLSocketFactory.getDefault();
        socket = ssf.createSocket(socket, host, port, true);
        configureSSLSocket(socket, props, prefix);
    } catch (Exception ex) {
        if (ex instanceof InvocationTargetException) {
            Throwable t = ((InvocationTargetException) ex).getTargetException();
            if (t instanceof Exception)
                ex = (Exception) t;
        }
        if (ex instanceof IOException)
            throw (IOException) ex;
        // wrap anything else before sending it on
        IOException ioex = new IOException(
                "Exception in startTLS: host " + host + ", port " + port + "; Exception: " + ex);
        ioex.initCause(ex);
        throw ioex;
    }
    return socket;
}

---

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 v  a2 s  .c  om

    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;
}

---

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