Re: wireguard-go on windows

[Devanath S <s.devanath@gmail.com>]

Hi  Jason/Matt,

I could try running any debug binaries or debug patches, that you want
to run to troubleshoot the issue. Plz, advice.

Regards,
Dev

On Thu, Feb 25, 2021 at 12:15 PM Matt Layher <mdlayher@gmail.com> wrote:
>
> A glance at
> https://github.com/WireGuard/wgctrl-go/blob/master/internal/wguser/parse.go#L48
> seems to indicate that we treat the first "blank" line produced by
> bufio.Scanner (which strips \n) as a sentinel to stop parsing, which
> would mean something like "errno=0\n\n" would parse the errno and be
> done once it interprets the final line "\n".
>
> The tests seem to indicate this works as expected, but I don't regularly
> develop on Windows and welcome PRs if something has changed.
> - Matt
>
> On 2/25/21 12:54 PM, Jason A. Donenfeld wrote:
> > + Matt Layher
> >
> > Hi Davanath,
> >
> >> We are trying to use wgctrl way of configuring the wireguard devices
> >> and facing issues while creating/configuring the wireguard device on
> >> windows.
> >>
> >> 1) First problem was while creating the wintun device using wintun.dll
> >> and using wgctrl for configuring it.  It hangs in
> >> wgclient.ConfigureDevice api()
> > wgctrl works with wireguard. wireguard uses wintun, but wireguard is not wintun.
> >
> >> 2) So tried to first create the device through wireguard.exe. And then
> >> used wgctrl way to configure it, but wgClient.Devices() is not able to
> >> get the devices on our test windows boxes (even though it works on my
> >> development machine)
> > This sounds like a potential bug in wgctrl.
> >
> > Matt -- I wonder if there's a bug in the parser, recently unearthed by
> > a change in wireguard-go. Specifically, uapi stipulates that requests
> > and responses end with \n\n. Is it possible that you're relying on the
> > socket to EOF, instead of looking for the \n\n? Recent wireguard-go
> > keeps the socket open, in case you want to send one request after
> > another.
> >
> > Jason