Re: Guidance to implement io_select on network devices

Hi

El 7/6/26 a les 19:55, Roy Marples ha escrit:
> I have ported what I need into bpf-hurd.c for dhcpcd.
> 
> As I can't get lwip working yet I have concentrated on getting it to 
> work with pfinet.
> This has been achieved with starting pfinet with the 0.0.0.0 address so 
> dhcpcd has something to work with.
> I have created a 10-pfinet hook script to configure pfinet using fsysopts.

I made some changes to pfinet recently that included setting the default 
address to 0.0.0.0

https://lists.gnu.org/archive/html/bug-hurd/2026-04/msg00060.html

If your pfinet doesn't set 0.0.0.0 as default, it's probably outdated 
and I would expect you to face some other problems like not being able 
to read the control block from packets.

> 
> My Gentoo hurd VM now starts and gets a working ssh connection 
> automatically.
> Happy days.
> 
> So where are we now?
> I'm waiting for a Gentoo bug to be solved in glibc to remove the AF_LINK 
> and SIOCAIFADDR defines to reduce the changes I need to make in dhcpcd.
> I need to work out why IN_PKTINFO is not present in the CMSG for DHCP 
> messages (unsure if pfinet bug or something I've done wrong, pfinet does 
> have code for it).

Yeah, that's what I meant. See the last changes in pfinet. Those 
problems are solved:

https://cgit.git.savannah.gnu.org/cgit/hurd/hurd.git/log/?qt=grep&q=pfinet

Also you would need a recent glibc to have IN_PKTINFO

https://lists.gnu.org/archive/html/bug-hurd/2026-01/msg00041.html

> I need to add a mechanism for handling gethostname(2) in dhcpcd's 
> privilege separation code.

I can work on privilege separation if you want to use your time in other 
matters. Tell me how can I be useful. I can also spend my time trying to 
hack gnumach to get notifications on ports, but that will take me much 
more time for sure.