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/*
* Copyright 2014-2015 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onlab.packet;
/**
* The class representing an IPv6 network address.
* This class is immutable.
*/
public final class Ip6Prefix extends IpPrefix {
public static final IpAddress.Version VERSION = IpAddress.Version.INET6;
// Maximum network mask length
public static final int MAX_MASK_LENGTH = IpPrefix.MAX_INET6_MASK_LENGTH;
/**
* Constructor for given IPv6 address, and a prefix length.
*
* @param address the IPv6 address
* @param prefixLength the prefix length
* @throws IllegalArgumentException if the prefix length value is invalid
*/
private Ip6Prefix(Ip6Address address, int prefixLength) {
super(address, prefixLength);
}
/**
* Returns the IPv6 address value of the prefix.
*
* @return the IPv6 address value of the prefix
*/
public Ip6Address address() {
IpAddress a = super.address();
return (Ip6Address) a;
}
/**
* Converts a byte array and a prefix length into an IPv6 prefix.
*
* @param address the IPv6 address value stored in network byte order
* @param prefixLength the prefix length
* @return an IPv6 prefix
* @throws IllegalArgumentException if the prefix length value is invalid
*/
public static Ip6Prefix valueOf(byte[] address, int prefixLength) {
return new Ip6Prefix(Ip6Address.valueOf(address), prefixLength);
}
/**
* Converts an IPv6 address and a prefix length into an IPv6 prefix.
*
* @param address the IPv6 address
* @param prefixLength the prefix length
* @return an IPv6 prefix
* @throws IllegalArgumentException if the prefix length value is invalid
*/
public static Ip6Prefix valueOf(Ip6Address address, int prefixLength) {
return new Ip6Prefix(address, prefixLength);
}
/**
* Converts a CIDR (slash) notation string (e.g., "1111:2222::/64")
* into an IPv6 prefix.
*
* @param address an IP prefix in string form (e.g.,"1111:2222::/64")
* @return an IPv6 prefix
* @throws IllegalArgumentException if the arguments are invalid
*/
public static Ip6Prefix valueOf(String address) {
final String[] parts = address.split("/");
if (parts.length != 2) {
String msg = "Malformed IPv6 prefix string: " + address + ". " +
"Address must take form " +
"\"xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx/y\"";
throw new IllegalArgumentException(msg);
}
Ip6Address ipAddress = Ip6Address.valueOf(parts[0]);
int prefixLength = Integer.parseInt(parts[1]);
return new Ip6Prefix(ipAddress, prefixLength);
}
}
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