On 03-Apr-22 12:21, Michael Richardson wrote:
I wish that more RFCs had such well thought out Security Considerations.
They are incomplete. There is a whole world of hurt if one considers IPv6 addresses. What are we to make of a prefix like 2cf2::/16 ? If we assume it's bioctal, it is really 28c2::/16 in hex. But if we assume it's hexadecimal, it's really 2cf2::/16. That sort of confusion between IP prefixes could be quite an operational problem and lead to all kinds of exposures. It means that auto-detection of bioctal vs hex is generally impossible. It's also hard to perceive vbc0::1234 as a link local address. However, in the interests of widespread community consideration of this problem, I have added support of bioctal to my little IP address checking program. Sorry to be a day or two late. https://github.com/becarpenter/misc/blob/main/addrPropsO.py Brian
