First of all, you should check that the addresses you want to match are valid. This has already been discussed recently in Matching an IP address. It's a bit more specific to check if one of your file entries is valid because it depends on the format you've chosen. For example, are 3 dots always needed? How many * signs are allowed, and where? Would *.*.*.255 be valid? And so on. However, with pattern matching and split you should be able to sort it out. Watch out if you split using . as a separator! It's a special character so you'll need to escape it.

Then it's a matter of a simple (internal) transformation on your file's contents: 128.10.*.* is almost a regular expression. All you need to do is escaping each dot with a backslash and substituting each * with [0-9]{1,3}

Then you should be able to match directly your transformed file entries with your addresses.

-- TMTOWTDI

In reply to Re: IP Verification Check System by trantor
in thread IP Verification Check System by LostS

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