On 4/28/25 12:22, Christoph Heiss wrote:
At least for IPv4 /31 prefixes, this check (including the network
address part) is wrong. RFC 3021 [0] explicitly allows such subnets for
point-to-point links.
E.g. 192.168.0.0/31 is a valid subnet with 2 hosts, 192.168.0.0/31 and
192.168.0.1/31.
[0] https://www.rfc-editor.org/rfc/rfc3021
You're right, I missed that. Thanks! I think for /32 and /31 it makes
sense to explicitly allow them, avoiding the calculations done for any
other valid subnet mask. I'll adapt the implementation accordingly in a v2.
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