/** * parse IPV6 ARPA domain to IP bytes. * * @param name an ARPA string. * @return ARPA. */ private static NetworkInBytes parseIpV6Arpa(String name) { LOGGER.debug("parseIp6Arpa, name:" + name); String arpa = StringUtils.removeEndIgnoreCase(name, CHAR_DOT + DomainUtil.IPV6_ARPA_SUFFIX); arpa = StringUtils.remove(arpa, CHAR_DOT); String ip = StringUtils.reverse(arpa); String fullIp = StringUtils.rightPad(ip, 32, '0'); byte[] startIpBytes = DatatypeConverter.parseHexBinary(fullIp); int networkMask = StringUtils.length(arpa) * 4; IPv6Address fromByteArray = IPv6Address.fromByteArray(startIpBytes); IPv6Network network = IPv6Network.fromAddressAndMask( fromByteArray, IPv6NetworkMask.fromPrefixLength(networkMask)); NetworkInBytes result = new NetworkInBytes( IpVersion.V6, network.getFirst().toByteArray(), network.getLast().toByteArray()); return result; }