/*
* Copyright (c) 2006 jDiameter.
* https://jdiameter.dev.java.net/
*
* License: GPL v3
*
* e-mail: erick.svenson@yahoo.com
*
*/
package org.jdiameter.client.impl.helpers;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.StringTokenizer;
/**
* This class allows to convert string to IPv4/IPv6 object instance
*/
public class IPConverter {
/**
* Convert defined string to IPv4 object instance
* @param address string representation of ip address
* @return IPv4 object instance
*/
public static InetAddress InetAddressByIPv4(String address) {
StringTokenizer addressTokens = new StringTokenizer(address, ".");
byte[] bytes;
if (addressTokens.countTokens() == 4)
bytes = new byte[]{
getByBytes(addressTokens),
getByBytes(addressTokens),
getByBytes(addressTokens),
getByBytes(addressTokens)
};
else
return null;
try {
return InetAddress.getByAddress(bytes);
} catch (UnknownHostException e) {
return null;
}
}
private static byte getByBytes(StringTokenizer addressTokens) {
int word = Integer.parseInt(addressTokens.nextToken());
return (byte) (word & 0xff);
}
/**
* Convert defined string to IPv6 object instance
* @param address string representation of ip address
* @return IPv6 object instance
*/
public static InetAddress InetAddressByIPv6(String address) {
StringTokenizer addressTokens = new StringTokenizer(address, ":");
byte[] bytes = new byte[16];
if (addressTokens.countTokens() == 8) {
int count = 0;
while (addressTokens.hasMoreTokens()) {
int word = Integer.parseInt(addressTokens.nextToken(), 16);
bytes[count * 2] = (byte) ((word >> 8) & 0xff);
bytes[count * 2 + 1] = (byte) (word & 0xff);
count++;
}
} else
return null;
try {
return InetAddress.getByAddress(bytes);
} catch (UnknownHostException e) {
return null;
}
}
}