IPv6 validation

Question

I used IPAddressUtil.isIPv6LiteralAddress (ipAddress) method to validate IPv6, but this method fails for ipv6-address/prefix-length format (format is mentioned in RFC 4291 section 2.3) of IPV6.

Could anyone know any validators which validate " ipv6-address/prefix-length " format?

Legal representations of IPV6

1. ABCD:EF01:2345:6789:ABCD:EF01:2345:6789
2. 2001:DB8:0:0:8:800:200C:417A
3. FF01:0:0:0:0:0:0:101
4. 0:0:0:0:0:0:0:1
5. 0:0:0:0:0:0:0:0
6. 2001:DB8::8:800:200C:417A
7. FF01::101
8. ::1
9. ::
10. 0:0:0:0:0:0:13.1.68.3
11. 0:0:0:0:0:FFFF:129.144.52.38
12. ::13.1.68.3
13. FFFF:129.144.52.38
14. 2001:0DB8:0000:CD30:0000:0000:0000:0000/60
15. 2001:0DB8::CD30:0:0:0:0/60
16. 2001:0DB8:0:CD30::/60

NOT legal representations of IPV6

1. 2001:0DB8:0:CD3/60
2. 2001:0DB8::CD30/60
3. 2001:0DB8::CD3/60

Answer 1

You can use the Guava library, specifically using the com.google.common.net.InetAddresses class, calling isInetAddress().

---

isInetAddress

public static boolean isInetAddress(String ipString)

Returns true if the supplied string is a valid IP string literal, false otherwise.

Parameters: ipString - String to evaluated as an IP string literal

Returns: true if the argument is a valid IP string literal