What problem are you trying to solve?

Are you trying to add IPv6 connectivity to an application that only speaks IPv4? Are you trying to add IPv4 connectivity to an application that only speaks IPv6?

Are you trying to find the IPv4 address of a user that connects to your application using IPv6? Are you trying to find the IPv6 address of a user that connects to your application via IPv4?

If you can show us a short, self-contained example (in Perl) of what you have and what you need, then we can likely give you much better advice.

In reply to Re: how to convet ipv4 ip to ipv6to4 ip by Corion
in thread how to convert ipv4 ip to ipv6to4 ip by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.