Re: RFC: Implementation of RFC 7217 [A Method for Generating Semantically Opaque Interface Identifiers, with IPv6 Stateless Address Autoconfiguration (SLAAC)]

Hi,

Next to hostuuid you could add a jailname in the mix.

That is what ether_gen_addr(9) does to make it easier to prevent collisions while copying jails around or run a jail on a readonly shared base filesystem.

Regards,
Ronald.

 
Van: Guido Falsi <madpilot@FreeBSD.org>
Datum: woensdag, 9 april 2025 12:17
Aan: Marek Zarychta <zarychtam@plan-b.pwste.edu.pl>, FreeBSD Current <freebsd-current@freebsd.org>, net@FreeBSD.org
Onderwerp: Re: RFC: Implementation of RFC 7217 [A Method for Generating Semantically Opaque Interface Identifiers, with IPv6 Stateless Address Autoconfiguration (SLAAC)]
> 
> On 4/6/25 23:38, Marek Zarychta wrote:
> > W dniu 6.04.2025 o 16:49, Guido Falsi pisze:
> >> Hi!
> >>
> >> I have recently implemented and tested the patch at [1], which >> implements RFC 7217, about generating IPv6 addresses that are constant >> through reboots, but do not expose the MAC address of the machine, not >> being in any way derived by those.
> >>
> >> I'd like to get comments, testing and review for this patch, with the >> objective of getting approval to commit it to head once it is >> streamlined enough.
> >>
> >> BTW I'd like to thank cognet for his suggestions and help with the >> patch, in particular his help in finding the correct way to implement >> the dad_failures counter.
> >>
> >>
> >> And thanks in advance to anyone willing to give feedback!
> >>
> >>
> >> [1] https://reviews.freebsd.org/D49681
> >>
> > This is great news for the community !
> >
> > I've already started testing it on both a desktop and a laptop - which > is probably even more valuable, especially since the laptop will be > connecting to various networks. If I encounter any issues, I will post > comments in the review.
> 
> I posted an updated patch, addressing feedback and containing some more improvements.
> 
> If testing this new patch, the flag needs to be activated per interface with ifconfig(8) now, or via tunable in loader.conf.
> 
> Should generate the same addresses it was generating before, with the only exception of the (relatively improbable) case that the previous patch was generating a reserved IPv6 address, which is now checked for and another one generated in such a case.
> 
> -- 
> Guido Falsi <madpilot@FreeBSD.org>
>  
> 
> 
>