org.apache.tomcat.util.net

## Class IPv6Utils

- java.lang.Object
- - org.apache.tomcat.util.net.IPv6Utils

-     public class IPv6Utils
      extends Object

  IPv6 utilities.

  For the moment, it only contains function to canonicalize IPv6 address into RFC 5952 form.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `IPv6Utils()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `static String` | `canonize(String ipv6Address)` Convert IPv6 address into RFC 5952 form.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### IPv6Utils

          public IPv6Utils()

  - ### Method Detail

    - #### canonize

          public static String canonize(String ipv6Address)
                                 throws IllegalArgumentException

      Convert IPv6 address into RFC 5952 form. E.g. 2001:db8:0:1:0:0:0:1 -> 2001:db8:0:1::1

      Method is null safe, and if IPv4 address or host name is passed to the method it is returned without any processing.

      Method also supports IPv4 in IPv6 (e.g. 0:0:0:0:0:ffff:192.0.2.1 -> ::ffff:192.0.2.1), and zone ID (e.g. fe80:0:0:0:f0f0:c0c0:1919:1234%4 -> fe80::f0f0:c0c0:1919:1234%4).

      The behaviour of this method is undefined if an invalid IPv6 address is passed in as input.

      Parameters:
        `ipv6Address` - String representing valid IPv6 address.
      Returns:
        String representing IPv6 in canonical form.
      Throws:
        `IllegalArgumentException` - if IPv6 format is unacceptable.

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