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The stories we can tell about getting 1.1.1.1 and 1.0.0.1 to be reliably routable…

Hey, I never checked before, but you seem to have 1.0.0.0 answering pings. That's awesome.

"ping 1.0" works. Now let's introduce floating point support to also ping 0.99999999999999… and 1.00000000000001…

I consider continued support of classful networking to be an inet_aton bug. I certainly don’t pass user input to it without sanitizing.