El 28/6/26 a les 15:23, Roy Marples ha escrit:
> Even autoconf addresses usually do have a non-128 prefix len, to be able
> to reach neighbours.
I agree with Samuel. Please don't do this.
Router Advertisements advertise a Prefix from which an address *may* be derived
based on length (64) and flags (make an autoconf address).
DHCPv6 addresses are always /128 because they are not directly tied to a Prefix.
It is impossible to infer a Prefix Length from any address.
I set it to /128 because that's how I understood this comment:
https://cgit.git.savannah.gnu.org/cgit/lwip.git/tree/src/core/ipv6/nd6.c#n1678
However it's true that in fact lwip only supports 64 bit prefixes.
If it receives and RA with a prefix other than 64, it drops it:
https://cgit.git.savannah.gnu.org/cgit/lwip.git/tree/src/core/ipv6/nd6.c#n213
I think we can assume the prefix will always be 64. I reverted this
change. I'm gonna send the updated patches now
