On Mon, 21 Oct 2024, Brotman, Alex wrote:
FYI, the ticket has been closed without merging, and the existing regular expressions will remain in the current document.
We all agreed that the current regular expressions for IP addresses are wrong and don't match what people send. The question was whether to try to replace them with a long RE that exactly matches valid addresses, or a short RE that just lists the valid characters. In the first case, it's hard to get long RE's correct, and several people said we're not in the IP definition business. In the latter case, the RE will let some invalid addresses through, presumably to be rejected later by address parsers.
It seems to me that address parsers are already going to reject addresses that are semantically invalid, e.g., 127.1.2.3 or ::123, so also allowing some syntactically invalid ones won't matter.
I suggest [0-9a-f:.]+ which lists the valid characters and is very short. Regards, John Levine, jo...@taugh.com, Primary Perpetrator of "The Internet for Dummies", Please consider the environment before reading this e-mail. https://jl.ly _______________________________________________ dmarc mailing list -- dmarc@ietf.org To unsubscribe send an email to dmarc-le...@ietf.org
