seems like the result is not correct for your example?

[fankeke]

since your example input ips like:

"fe80::/32"

the given ipv6 address"::1"

print(ip:match("::1"))  

the the result is true, which is obviously not correct?

am i miss anything ?

[fankeke]

IPv6 Address ::1: This is the loopback address in IPv6, equivalent to 127.0.0.1 in IPv4. It is used to refer to the local host.

Network fe80::/32: This is a link-local address range in IPv6. The prefix fe80::/32 is used for link-local addresses, which are only valid on a specific network segment (link).

Comparison:

The first 32 bits of fe80::/32 are 1111111010000000 (in binary), which corresponds to fe80::.

The first 32 bits of ::1 are all zeros (0000...0000), which does not match fe80::.

Since the first 32 bits of ::1 do not match the fe80::/32 prefix, the address ::1 is not within the fe80::/32 network.

Summary:
::1 is a loopback address.

fe80::/32 is a link-local address range.

::1 does not match the fe80::/32 network.