dhcpcd-discuss

You should start with latest git commit on master.

Thank you,
Boris Krasnovskiy

From: bls s
Sent: Wednesday, December 23, 2020 8:01 PM
To: Roy Marples; Boris Krasnovskiy
Cc: dhcpcd-discuss@xxxxxxxxxxxx
Subject: RE: dhcpcd kills all connections on Wi-Fi roaming between accesspoints

Roy, thanks very much for this! A couple of quick question:

* What dhcpcd sources should I start with? I tried 9.3.4, and got an undefined symbol if_roaming in route.c when I built it. Guessing 9.3.4 isn't correct.

* Again, using 9.3.4 to make sure that I could build it, I couldn't get the pidfile defined correctly. 
My configure command line: ./configure --libexecdir=/lib/dhcpcd --localstatedir=/var/lib/dhcpcd5 --rundir=/run/dhcpcd --dbdir=/var/lib/dhcpcd5 --disable-privsep --privsep-user=root

Error during boot: dhcpcd.service: Can't open PID file /run/dhcpcd.pid (yet?) after start: No such file or directory

Dhcpcd runs as root on raspios. /run and /run/dhcpcd both exist, but I am unable to sort out why dhcpcd can't open it in /run, or how to get it to write the pid file to /run/dhcpcd, which is where the raspios Buster dhcpcd5 writes it. I suspect the location is a red herring, just mentioning it for completeness.

Thx

bls

-----Original Message-----
From: Roy Marples <roy@xxxxxxxxxxxx> 
Sent: Wednesday, December 23, 2020 4:21 PM
To: Boris Krasnovskiy <borkra@xxxxxxxxx>
Cc: dhcpcd-discuss@xxxxxxxxxxxx
Subject: Re: dhcpcd kills all connections on Wi-Fi roaming between access points

Hi Boris

On 12/12/2020 13:20, Roy Marples wrote:
>> 1. It seems 20-resolv.conf hook is trying to remove DNS info on 
>> roaming, this should not happen
> 
> Currently it does by design.
> I know it's not desirable for you, but all the hooks need some work as 
> noted in my commit. It's just not as simple as reversing in in dhcpcd.

I found some time to work on this and a patch is attached.
If you use resolvconf, you will need a version with the new -C and -c options.
If you use my openresolv, you can find this in the master branch of the openresolv repository.

If you don't use resolvconf or there are no -C or -c options then it will function as before, but the DNS information will persist.

Let me know how this works for you.

Roy