Duane schrieb:
Hugo van der Kooij wrote:
But the annotated manual said there is an issue with the detection of
some address forms in those routines. So it may not work as well as
expected. I need to think on this a bit more and test it a lot before I
submit patches.
IPv4 and IPv6 both follow fairly simple patterns that regex could be
used for if the other method is too hit and miss.
One gotcha though is IPv4 can be shortened just like IPv6 can eg 1..1,
although this is less common with IPv4 then IPv6 eg 3001::1
Hm...one could also write a 'shortened-form-detection' and let PHP
expand them before actually validating them (does that make sense at all?)
Maybe vice-versa you can also write a function (which probably already
exists somewhere) to shorten your IPv6 addresses before displaying them
in the web interface - that way you have "complete" IPv6 addresses in
your database but your web interface does not get cluttered with tons of
"0:0:0:0..."
With respect to shortened prefixes there can be only one per IP address,
but the shortened IPs is the only corner case I can think of that might
cause issues.
The only problem I had so far happens with MX and CNAME records:
they may not contain IP adresses, but a hostname my contain dots and
numbers - which leads to a quite complicated regex (e.g. allow whatever
a regular hostname can contain BUT fail if it looks like an IPv4 address)
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