In message <4b6b66ff.50...@spaghetti.zurich.ibm.com>, Jeroen Massar writes: > Richard E. Brown wrote: > > Folks, > >=20 > > My company, Dartware, have derived a regex for testing whether an IPv6 > > address is correct. I've posted it in my blog: > >=20 > > http://intermapper.ning.com/profiles/blogs/a-regular-expression-for= > -ipv6 > >=20 > >=20 > > This has links to the regular expression, a (Perl) program that tests > > various correct and malformed addresses, and a Ruby implementation of > > the same. > > You know, link local addresses (fe80::/10) are quite useless without > specifying the zone of that address. See section 11 of RFC4007. > > The only proper way of "testing" if an address is a valid IPv6 address > is to feed it to getaddrinfo() and then use it through that API. > Yes, you can make some assumptions, but it has shown that people > assuming that everything stayed under 2001::/16 also got it wrong at one > point in time. Thus just feed it to getaddrinfo() if you really need it. > > Greets, > Jeroen
And now for the trick question. Is ::ffff:077.077.077.077 a legal mapped address and if it, does it match 077.077.077.077? Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org
