From the Regexp::Common::net docs:
$RE{net}{IPv4}
Returns a pattern that matches a valid IP address in "dotted decimal"
So it only matches the traditional dotted-quad form of IPv4 addresses. That's just one format IPv4 can come in (albeit the most common). There are modifiers Regexp::Common allows for some other formats (like "dotted hex"), but not all possible formats (a simple 32-bit number, for example).
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: () { :|:& };:
Note: All code is untested, unless otherwise stated
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There are modifiers Regexp::Common allows for some other formats (like "dotted hex"), but not all possible formats (a simple 32-bit number, for example).
Yeah, it's true that IP addresses can be given as a 32-bit number, and while I've encountered such IP addresses many times, it's always as data in a program, or binary data between programs. I've never found myself parsing 32 bit numbers out of a file, to get the IP address.
Abigail
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