IPv6 routing /48s

Mark Andrews Mark_Andrews at isc.org
Tue Nov 25 18:55:02 CST 2008


In message <20081126002425.GO78345 at burnout.tpb.net>, Niels Bakker writes:
> * alh-ietf at tndh.net (Tony Hain) [Wed 26 Nov 2008, 01:03 CET]:
> > In any case, content providers can avoid the confusion if they simply put u
> p
> > a local 6to4 router alongside their 2001:: prefix, and populate DNS with
> > both. Longest match will cause 2001:: connected systems to chose that dst,
> > while 6to4 connected systems will chose 2002:: as the dst. There is no need
> 
> Huh?  Longest match done by web browsers and other applications?  Since 
> when?

FreeBSD 6 has is as part of the standard getaddrinfo() implementation.

% grep -r in6_addrpolicy /usr/src/lib/libc
/usr/src/lib/libc/net/getaddrinfo.c:    struct in6_addrpolicy pc_policy;
/usr/src/lib/libc/net/getaddrinfo.c:    struct in6_addrpolicy *pol, *ep;
/usr/src/lib/libc/net/getaddrinfo.c:    ep = (struct in6_addrpolicy *)(buf + l);
/usr/src/lib/libc/net/getaddrinfo.c:    for (pol = (struct in6_addrpolicy *)buf; pol + 1 <= ep; pol++) {
/usr/src/lib/libc/net/getaddrinfo.c:    struct in6_addrpolicy *pol;
/usr/src/lib/libc/net/name6.c:  struct in6_addrpolicy pc_policy;
/usr/src/lib/libc/net/name6.c:  struct in6_addrpolicy *pol, *ep;
/usr/src/lib/libc/net/name6.c:  ep = (struct in6_addrpolicy *)(buf + l);
/usr/src/lib/libc/net/name6.c:  for (pol = (struct in6_addrpolicy *)buf; pol + 1 <= ep; pol++) {
/usr/src/lib/libc/net/name6.c:  struct in6_addrpolicy *pol;
% 
 
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org




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