Subject: Re: RFC1933 IPv4 mapped address
To: None <email@example.com>
From: Andrew Brown <firstname.lastname@example.org>
Date: 12/19/1999 23:16:38
>Well, standards are standards but I don't like to have it on by
>default as to me it doesn't follow the rule `of least suprise';
>It makes a bind on INET6 get fuzzy semantics, as application
>programmer you may think you're accepting only real INET6 connections
>but you have no way of telling whether you get IPv4 connections in
if you're doing a bind to an INET6 socket and using an appropriately
sized sockaddr in the accept call, can't you just check the ipv6
address in the resulting sockaddr via the IN6_IS_ADDR_V4MAPPED() macro
(from rfc2133, and superceded by rfc2553)?
then your application could "know" that it got an ipv4 connection and
|-----< "CODE WARRIOR" >-----|
email@example.com * "ah! i see you have the internet
firstname.lastname@example.org (Andrew Brown) that goes *ping*!"
email@example.com * "information is power -- share the wealth."