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
