Merge "Add a string constructor to LinkAddress." into klp-dev

    /**

     * IPv4 or IPv6 address.

     */

    private final InetAddress address;

    private InetAddress address;

    /**

     * Network prefix length

     */

    private final int prefixLength;

    private int prefixLength;

    public LinkAddress(InetAddress address, int prefixLength) {

    private void init(InetAddress address, int prefixLength) {

        if (address == null || prefixLength < 0 ||

                ((address instanceof Inet4Address) && prefixLength > 32) ||

                (prefixLength > 128)) {

            throw new IllegalArgumentException("Bad LinkAddress params " + address +

                    prefixLength);

                    "/" + prefixLength);

        }

        this.address = address;

        this.prefixLength = prefixLength;

    }

    public LinkAddress(InetAddress address, int prefixLength) {

        init(address, prefixLength);

    }

    public LinkAddress(InterfaceAddress interfaceAddress) {

        this.address = interfaceAddress.getAddress();

        this.prefixLength = interfaceAddress.getNetworkPrefixLength();

        init(interfaceAddress.getAddress(),

             interfaceAddress.getNetworkPrefixLength());

    }

    /**

     * Constructs a new {@code LinkAddress} from a string such as "192.0.2.5/24" or

     * "2001:db8::1/64".

     * @param string The string to parse.

     */

    public LinkAddress(String address) {

        InetAddress inetAddress = null;

        int prefixLength = -1;

        try {

            String [] pieces = address.split("/", 2);

            prefixLength = Integer.parseInt(pieces[1]);

            inetAddress = InetAddress.parseNumericAddress(pieces[0]);

        } catch (NullPointerException e) {            // Null string.

        } catch (ArrayIndexOutOfBoundsException e) {  // No prefix length.

        } catch (NumberFormatException e) {           // Non-numeric prefix.

        } catch (IllegalArgumentException e) {        // Invalid IP address.

        }

        if (inetAddress == null || prefixLength == -1) {

            throw new IllegalArgumentException("Bad LinkAddress params " + address);

        }

        init(inetAddress, prefixLength);

    }

    @Override