org.opendaylight.netvirt.it.Ipv6Utils.java Source code

Introduction

Here is the source code for org.opendaylight.netvirt.it.Ipv6Utils.java

Source

/*
 * Copyright (c) 2016 Red Hat, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.netvirt.it;

import com.google.common.net.InetAddresses;
import org.apache.commons.lang3.StringUtils;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Address;

public class Ipv6Utils {

    public String getIpv6AddressUsingEui64(String ipPrefix, String mac) {
        byte[] octets = bytesFromHexString(mac);

        StringBuffer interfaceID = new StringBuffer();
        short u8byte = (short) (octets[0] & 0xff);
        u8byte ^= 1 << 1;
        interfaceID.append(Integer.toHexString(0xFF & u8byte));
        interfaceID.append(StringUtils.leftPad(Integer.toHexString(0xFF & octets[1]), 2, "0"));
        interfaceID.append(":");
        interfaceID.append(Integer.toHexString(0xFF & octets[2]));
        interfaceID.append("ff:fe");
        interfaceID.append(StringUtils.leftPad(Integer.toHexString(0xFF & octets[3]), 2, "0"));
        interfaceID.append(":");
        interfaceID.append(Integer.toHexString(0xFF & octets[4]));
        interfaceID.append(StringUtils.leftPad(Integer.toHexString(0xFF & octets[5]), 2, "0"));

        Ipv6Address ipv6LLA = new Ipv6Address(
                InetAddresses.forString(ipPrefix + interfaceID.toString()).getHostAddress());
        return ipv6LLA.getValue();
    }

    private byte[] bytesFromHexString(String values) {
        String target = "";
        if (values != null) {
            target = values;
        }
        String[] octets = target.split(":");

        byte[] ret = new byte[octets.length];
        for (int i = 0; i < octets.length; i++) {
            ret[i] = Integer.valueOf(octets[i], 16).byteValue();
        }
        return ret;
    }
}