NetworkUtils.java

package mobi.monaca.framework.util;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Collections;
import java.util.List;

import org.apache.http.conn.util.InetAddressUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class NetworkUtils {
	/**
	 * Get IP address from first non-localhost interface
	 * 
	 * @param ipv4
	 *            true=return ipv4, false=return ipv6
	 * @return address or empty string
	 */
	public static String getIPAddress(boolean useIPv4) {
		try {
			List<NetworkInterface> interfaces = Collections
					.list(NetworkInterface.getNetworkInterfaces());
			for (NetworkInterface intf : interfaces) {
				List<InetAddress> addrs = Collections.list(intf
						.getInetAddresses());
				for (InetAddress addr : addrs) {
					if (!addr.isLoopbackAddress()) {
						String sAddr = addr.getHostAddress().toUpperCase();
						boolean isIPv4 = InetAddressUtils.isIPv4Address(sAddr);
						if (useIPv4) {
							if (isIPv4)
								return sAddr;
						} else {
							if (!isIPv4) {
								int delim = sAddr.indexOf('%'); // drop ip6 port
																// suffix
								return delim < 0 ? sAddr : sAddr.substring(0,
										delim);
							}
						}
					}
				}
			}
		} catch (Exception ex) {
		} // for now eat exceptions
		return "";
	}

	public static JSONObject getIPAddresses() throws SocketException, JSONException {
		JSONObject networkJson= new JSONObject();
		List<NetworkInterface> interfaces = Collections.list(NetworkInterface
				.getNetworkInterfaces());
		for (NetworkInterface intf : interfaces) {
			List<InetAddress> addrs = Collections.list(intf.getInetAddresses());
			for (InetAddress addr : addrs) {
				if (!addr.isLoopbackAddress()) {
					String ipAddress = addr.getHostAddress().toUpperCase();
					boolean isIPv4 = InetAddressUtils.isIPv4Address(ipAddress);
					if (isIPv4) {						
						String interfacename = intf.getName();
						networkJson.put(interfacename, ipAddress);
					}
				}
			}
		}
		return networkJson;
	}

}