checkArgument(
        isCompatIPv4Address(ip), "Address '%s' is not IPv4-compatible.", toAddrString(ip));

    return getInet4Address(Arrays.copyOfRange(ip.getAddress(), 12, 16));
  }

  /**
   * Evaluates whether the argument is a 6to4 address.
   *
   * <p>6to4 addresses begin with the {@code "2002::/16"} prefix. The next 32 bits are the IPv4

    checkArgument(
        isCompatIPv4Address(ip), "Address '%s' is not IPv4-compatible.", toAddrString(ip));

    return getInet4Address(Arrays.copyOfRange(ip.getAddress(), 12, 16));
  }

  /**
   * Evaluates whether the argument is a 6to4 address.
   *
   * <p>6to4 addresses begin with the {@code "2002::/16"} prefix. The next 32 bits are the IPv4

        writeInt2(buffer, offset + 6, nameLen);  // NameLength
        writeInt2(buffer, offset + 8, 0);  // Reserved
        writeInt2(buffer, offset + 10, 16);  // DataOffset
        writeInt4(buffer, offset + 12, 16);  // DataLength
        
        // Name
        System.arraycopy(getName().getBytes(), 0, buffer, offset + 16, nameLen);
        
        // Data (16-byte file ID)
        int dataOffset = offset + 16 + nameLen;

         * the hostname and getting a different IP, we must use the current addresses
         * IP rather than just url.getHost() like we were using prior to 1.2.16.
         */

        handle = DcerpcHandle.getHandle("ncacn_np:" + getAddress().getHostAddress() + "[\\PIPE\\srvsvc]", auth);

        try {
            handle.sendrecv(rpc);