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Don't accept overly long IPv6 numbers #79

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Don't accept overly long IPv6 numbers #79

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Commits on Jun 22, 2020

  1. Don't accept overly long IPv6 numbers 

    The current code stops parsing a hex number after 4 digits and then
loops around to look for punctuation.  If none is found, it just
starts parsing more hex digits, so it will accept invalid IPv6 such
as `1::1234567890abcdef`

My simple tweak makes it return 0 if a 5th digit is found.
    @WayneD
    WayneD authored Jun 22, 2020
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