Example usage for org.apache.hadoop.net DNS getIPs

Introduction

In this page you can find the example usage for org.apache.hadoop.net DNS getIPs.

Prototype

public static String[] getIPs(String strInterface, boolean returnSubinterfaces) throws UnknownHostException 

Source Link

Document

Returns all the IPs associated with the provided interface, if any, in textual form.

Usage

From source file:com.mellanox.r4h.DFSClient.java

License:Apache License

/**
 * Return the socket addresses to use with each configured
 * local interface. Local interfaces may be specified by IP
 * address, IP address range using CIDR notation, interface
 * name (e.g. eth0) or sub-interface name (e.g. eth0:0).
 * The socket addresses consist of the IPs for the interfaces
 * and the ephemeral port (port 0). If an IP, IP range, or
 * interface name matches an interface with sub-interfaces
 * only the IP of the interface is used. Sub-interfaces can
 * be used by specifying them explicitly (by IP or name).
 * /* w ww .j  a v a 2 s.c  o m*/
 * @return SocketAddresses for the configured local interfaces,
 *         or an empty array if none are configured
 * @throws UnknownHostException
 *             if a given interface name is invalid
 */
private static SocketAddress[] getLocalInterfaceAddrs(String interfaceNames[]) throws UnknownHostException {
    List<SocketAddress> localAddrs = new ArrayList<SocketAddress>();
    for (String interfaceName : interfaceNames) {
        if (InetAddresses.isInetAddress(interfaceName)) {
            localAddrs.add(new InetSocketAddress(interfaceName, 0));
        } else if (NetUtils.isValidSubnet(interfaceName)) {
            for (InetAddress addr : NetUtils.getIPs(interfaceName, false)) {
                localAddrs.add(new InetSocketAddress(addr, 0));
            }
        } else {
            for (String ip : DNS.getIPs(interfaceName, false)) {
                localAddrs.add(new InetSocketAddress(ip, 0));
            }
        }
    }
    return localAddrs.toArray(new SocketAddress[localAddrs.size()]);
}

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