Bug#783160: update
Control: tags -1 + moreinfo
Hi Ian,
On Sun, Aug 04, 2019 at 03:26:38PM +0100, Iain Learmonth wrote:
> reassign 783160 src:linux
> kthxbye
>
> Hi,
>
> There is definitely an issue here that I've just reproduced with the
> kernel from unstable + the latest libax25 from experimental.
>
> I don't think it is actually ever sending these duplicate packets on the
> KISS interface, I don't see them being sent via the radio, but I do see
> duplicates (sometimes 2, sometimes 3) when using tcpdump on the ax
> interface.
>
> The interface is set up as follows (just do this as root):
>
> sudo apt install direwolf net-tools
> sudo apt install -t experimental libax25 ax25-tools ax25-apps
> cat > /etc/ax25/axports <<EOF
> radio AA1ABC 1200 255 2 test
> EOF
> cat > direwolf.conf <<EOF
> ADEVICE pulse
> EOF
> direwolf -p
> kissattach /dev/pts/<X> radio 10.0.0.2
> arp -H ax25 -i ax<X> -s 10.0.0.3 AA2ABC
> ping -c 1 10.0.0.2
>
> You don't need a radio plugged in but expect modem noises to come out
> your speakers, maybe turn them down first!
>
> You'll see in direwolf that it logs a single packet going out to AA2ABC.
> If you're running tcpdump on the ax<X> interface though, you'll see the
> packet appears 2 or 3 times.
>
> I've reproduced this on both amd64 and i386. I'm happy to try out any
> patches or assist the upstream if that is useful.
Is this still something you can reproduce with a recent kernel or
ideally mainline upstream? If so can you please report it upstream
(and keeping the downstream bugreport in the loop?)
Regards,
Salvatore
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