Re: Question about RFC6724

[Philip Homburg <[e-mail]>]

>10.1.0.10 printer.mynet.example.com
>192.168.178.99 printer.mynet.example.com
>
>then getaddrinfo() returns this, on a Windows host whose IPv4
>address is 192.168.178.20:
>
>(<AddressFamily.AF_INET: 2>, 0, 0, '', ('10.1.0.10', 0))
>(<AddressFamily.AF_INET: 2>, 0, 0, '', ('192.168.178.99', 0))

Thanks for the example.

After careful reading of RFC 6724, I think you are right.

We should update the description of CommonPrefixLen, such that
for IPv4-mapped it considers the length of IPv4 prefix.

I thought the reason it mentions 64, is that it is hard to use the 
real prefix length. For example, in a system that receives addresses
using IA_NA and where there are no onlink prefixes, how does one 
determine "the portion of the address not including the interface ID".

However, that is an IPv6 problem. For IPv4 it should be clear what
the prefix length is.