Progress on tailscale on NetBSD (plus $ available)

[David Brownlee <abs%absd.org@localhost>]

I have some potential progress on tailscale working on NetBSD

I created a Freelancer.com project for "Fix Tailscale tun networking
on NetBSD" with a small amount of $ for "have a look and document what
you tried" and somewhat more for "get it working". While @vudinhgiang
did not get it fully working, they found enough of interest that they
were paid the full amount :)

Anyway, back to the progress.

This is based on the wip/tailscale package, which is v1.94.2

The status quo is: rc.d/tailscaled has "-tun userspace-networking",
which has tailscale working with (unsurprisingly) userspace
networking, changing it to "-tun tun0" will cause tailscale to try to
start tun networking and fail.

@vudinhgiang discovered that if you manually set the IP address on
tun0, the tailscale network comes up. As a proof of concept he hacked
in some code inside tailscale to shell out to ifconfig to set the IP,
but it also works if you manually set the IP before {re,}starting
tailscaled

I don't know what is special about tailscale and NetBSD, as tailscale
runs fine on other BSDs and wireguard runs fine on NetBSD, but maybe
someone with more tun knowledge has an idea?

Once the tun networking has started we still cannot contact other
systems as the NetBSD end appears to use its main IP address, not the
IP of the tun interface

So - at least we now have two clearly defined issues with tailscale on NetBSD

Based on that, if anyone is interested in taking another tilt I'm
happy to re-offer the $200 for a working NetBSD tailscale pkgsrc
package using tun networking :)

Thanks

David