nanog mailing list archives
Re: Regular Expression for IPv6 addresses
From: Mark Andrews <marka () isc org>
Date: Fri, 05 Feb 2010 12:02:11 +1100
In message <4B6B66FF.50108 () 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: marka () isc org
Current thread:
- Regular Expression for IPv6 addresses Richard E. Brown (Feb 04)
- Re: Regular Expression for IPv6 addresses Jeroen Massar (Feb 04)
- Re: Regular Expression for IPv6 addresses Mark Andrews (Feb 04)
- Re: Regular Expression for IPv6 addresses Jeroen Massar (Feb 04)
- Re: Regular Expression for IPv6 addresses Mark Andrews (Feb 04)
- Re: Regular Expression for IPv6 addresses sthaug (Feb 04)
- Re: Regular Expression for IPv6 addresses James Hess (Feb 06)
- Re: Regular Expression for IPv6 addresses Mark Andrews (Feb 06)
- Re: Regular Expression for IPv6 addresses Mark Andrews (Feb 04)
- Re: Regular Expression for IPv6 addresses isabel dias (Feb 05)
- Re: Regular Expression for IPv6 addresses Jeroen Massar (Feb 04)
- Re: Regular Expression for IPv6 addresses Thomas Habets (Feb 09)
- Re: Regular Expression for IPv6 addresses Mark Andrews (Feb 09)
- Re: Regular Expression for IPv6 addresses Valdis . Kletnieks (Feb 09)