Hi,
On Fri, Dec 15, 2023 at 01:44:29PM -0800, Maciej Żenczykowski wrote:
> Here's my recommendation.
> On the gadget side.
> Print something when the timer is armed.
> Print something when the timer fires.
> Include the timestamp.
>
> Then try to send something (a single packet) that won't trigger a reply.
>
> For example run a script in a screen session that sends 1 unsolicited
> arp reply packet every 10 seconds.
> This is rare enough, it should obviously get the timer to fire.
> Again, wait 5 minutes, so you've had 30+ packets sent.
> See if it does even fire...
> You can run tcpdump on the receiver to see what you receive (and the
> timestamps on that)
Thanks for the recommendation, I did what you suggested for 5 minutes
adding printk's for all 'hrtimer_*' function calls inside f_ncm.c.
Basically we only get 'hrtimer_start' and 'hrtimer_try_to_cancel' calls,
which makes sense. Here is the result, doing ARP pings from the device
to the host PC:
[ 20.427879] hfranco: hrtimer_try_to_cancel
[ 21.270355] hfranco: hrtimer_start
[ 21.270732] hfranco: hrtimer_try_to_cancel
[ 31.695892] hfranco: hrtimer_start
[ 31.696215] hfranco: hrtimer_try_to_cancel
[ 36.324646] hfranco: hrtimer_start
[ 36.324989] hfranco: hrtimer_try_to_cancel
[ 37.168880] hfranco: hrtimer_start
[ 37.169216] hfranco: hrtimer_try_to_cancel
[ 60.359510] hfranco: hrtimer_start
[ 60.359836] hfranco: hrtimer_try_to_cancel
[ 68.188814] hfranco: hrtimer_start
[ 68.189141] hfranco: hrtimer_try_to_cancel
[ 69.035732] hfranco: hrtimer_start
[ 69.036062] hfranco: hrtimer_try_to_cancel
[ 90.413786] hfranco: hrtimer_start
[ 90.414116] hfranco: hrtimer_try_to_cancel
[ 100.380712] hfranco: hrtimer_start
[ 100.381048] hfranco: hrtimer_try_to_cancel
[ 110.349906] hfranco: hrtimer_start
[ 110.350247] hfranco: hrtimer_try_to_cancel
[ 120.321527] hfranco: hrtimer_start
[ 120.321872] hfranco: hrtimer_try_to_cancel
[ 120.325531] hfranco: hrtimer_start
[ 120.325869] hfranco: hrtimer_try_to_cancel
[ 130.295101] hfranco: hrtimer_start
[ 130.295428] hfranco: hrtimer_try_to_cancel
[ 131.992642] hfranco: hrtimer_start
[ 131.992984] hfranco: hrtimer_try_to_cancel
[ 132.839585] hfranco: hrtimer_start
[ 132.839927] hfranco: hrtimer_try_to_cancel
[ 140.270782] hfranco: hrtimer_start
[ 140.271112] hfranco: hrtimer_try_to_cancel
[ 150.248507] hfranco: hrtimer_start
[ 150.248848] hfranco: hrtimer_try_to_cancel
[ 160.228126] hfranco: hrtimer_start
[ 160.228453] hfranco: hrtimer_try_to_cancel
[ 170.209459] hfranco: hrtimer_start
[ 170.209822] hfranco: hrtimer_try_to_cancel
[ 180.192015] hfranco: hrtimer_start
[ 180.192351] hfranco: hrtimer_try_to_cancel
[ 190.176082] hfranco: hrtimer_start
[ 190.176423] hfranco: hrtimer_try_to_cancel
[ 200.161272] hfranco: hrtimer_start
[ 200.161600] hfranco: hrtimer_try_to_cancel
[ 210.147622] hfranco: hrtimer_start
[ 210.147949] hfranco: hrtimer_try_to_cancel
[ 220.135257] hfranco: hrtimer_start
[ 220.135582] hfranco: hrtimer_try_to_cancel
[ 230.123934] hfranco: hrtimer_start
[ 230.124274] hfranco: hrtimer_try_to_cancel
[ 237.879789] hfranco: hrtimer_start
[ 237.880133] hfranco: hrtimer_try_to_cancel
[ 240.113459] hfranco: hrtimer_start
[ 240.113794] hfranco: hrtimer_try_to_cancel
[ 250.103968] hfranco: hrtimer_start
[ 250.104309] hfranco: hrtimer_try_to_cancel
[ 259.800618] hfranco: hrtimer_start
[ 259.800946] hfranco: hrtimer_try_to_cancel
[ 260.095486] hfranco: hrtimer_start
[ 260.095828] hfranco: hrtimer_try_to_cancel
[ 260.646435] hfranco: hrtimer_start
[ 260.646776] hfranco: hrtimer_try_to_cancel
[ 270.087384] hfranco: hrtimer_start
[ 270.087711] hfranco: hrtimer_try_to_cancel
[ 280.080143] hfranco: hrtimer_start
[ 280.080468] hfranco: hrtimer_try_to_cancel
[ 290.073603] hfranco: hrtimer_start
[ 290.073945] hfranco: hrtimer_try_to_cancel
[ 300.067513] hfranco: hrtimer_start
[ 300.067852] hfranco: hrtimer_try_to_cancel
[ 310.061945] hfranco: hrtimer_start
[ 310.062297] hfranco: hrtimer_try_to_cancel
[ 320.056667] hfranco: hrtimer_start
[ 320.057008] hfranco: hrtimer_try_to_cancel
[ 330.051900] hfranco: hrtimer_start
[ 330.052255] hfranco: hrtimer_try_to_cancel
[ 340.047353] hfranco: hrtimer_start
[ 340.047678] hfranco: hrtimer_try_to_cancel
[ 350.044862] hfranco: hrtimer_start
[ 350.045221] hfranco: hrtimer_try_to_cancel
[ 360.043011] hfranco: hrtimer_start
[ 360.043352] hfranco: hrtimer_try_to_cancel
[ 370.041268] hfranco: hrtimer_start
[ 370.041611] hfranco: hrtimer_try_to_cancel
[ 380.039556] hfranco: hrtimer_start
[ 380.039891] hfranco: hrtimer_try_to_cancel
[ 390.037826] hfranco: hrtimer_start
[ 390.038150] hfranco: hrtimer_try_to_cancel
[ 400.036353] hfranco: hrtimer_start
/ # arping -U -I usb0 -i 10 -s 192.168.11.1 192.168.11.2
ARPING 192.168.11.2 from 192.168.11.1 usb0
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.504ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.459ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.612ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.676ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.509ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.696ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 3.008ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.446ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.776ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.529ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.669ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.523ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.574ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.872ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.654ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.639ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.576ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.584ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.560ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.393ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.627ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.799ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.980ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.661ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.707ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.523ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.711ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.704ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.566ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.678ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.592ms
Unicast reply from 192.168.11.2 [62:05:42:DF:6F:C2] 2.654ms
^CSent 32 probes (1 broadcast(s))
Received 32 response(s)
$ sudo tcpdump -i enx620542df6fc2
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on enx620542df6fc2, link-type EN10MB (Ethernet), snapshot length 262144 bytes
17:02:32.599638 IP6 hdebian > ip6-allrouters: ICMP6, router solicitation, length 8
17:02:35.425325 IP6 apalis-imx6-10692086.local > ip6-allrouters: ICMP6, router solicitation, length 16
17:02:42.810738 IP6 hdebian.mdns > ff02::fb.mdns: 0 [2q] PTR (QM)? _ipps._tcp.local. PTR (QM)? _ipp._tcp.local. (45)
17:02:42.865794 IP6 hdebian.mdns > ff02::fb.mdns: 0 [b2&3=0x200] [2a] PTR (QM)? b.f.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa. (181)
17:02:42.865832 IP6 hdebian.mdns > ff02::fb.mdns: 0 [0q] (12)
17:02:43.253971 IP apalis-imx6-10692086.local.mdns > mdns.mcast.net.mdns: 0 [1a] PTR (QM)? _tezi._tcp.local. (71)
17:02:43.895157 IP6 hdebian.mdns > ff02::fb.mdns: 0 [b2&3=0x200] [2a] PTR (QM)? b.f.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa. (181)
17:02:43.895196 IP6 hdebian.mdns > ff02::fb.mdns: 0 [0q] (12)
17:02:44.100862 IP6 apalis-imx6-10692086.local.mdns > ff02::fb.mdns: 0 [1a] PTR (QM)? _tezi._tcp.local. (71)
17:02:44.961717 IP hdebian.mdns > mdns.mcast.net.mdns: 0 [2q] PTR (QM)? _ipps._tcp.local. PTR (QM)? _ipp._tcp.local. (45)
17:02:46.145083 IP6 hdebian.mdns > ff02::fb.mdns: 0 [b2&3=0x200] [2a] PTR (QM)? b.f.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa. (181)
17:02:46.145128 IP6 hdebian.mdns > ff02::fb.mdns: 0 [0q] (12)
17:03:05.477178 ARP, Request who-has hdebian (Broadcast) tell apalis-imx6-10692086.local, length 28
17:03:05.477217 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:03:15.443291 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:03:15.443309 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:03:24.580306 IP6 hdebian > ip6-allrouters: ICMP6, router solicitation, length 8
17:03:25.411804 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:03:25.411821 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:03:35.382697 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:03:35.382717 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:03:35.386582 IP6 apalis-imx6-10692086.local > ip6-allrouters: ICMP6, router solicitation, length 16
17:03:45.355482 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:03:45.355504 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:03:46.811643 IP6 hdebian.mdns > ff02::fb.mdns: 0 [2q] PTR (QM)? _ipps._tcp.local. PTR (QM)? _ipp._tcp.local. (45)
17:03:47.052930 IP apalis-imx6-10692086.local.mdns > mdns.mcast.net.mdns: 0 [1a] PTR (QM)? _tezi._tcp.local. (71)
17:03:47.899743 IP6 apalis-imx6-10692086.local.mdns > ff02::fb.mdns: 0 [1a] PTR (QM)? _tezi._tcp.local. (71)
17:03:48.962107 IP hdebian.mdns > mdns.mcast.net.mdns: 0 [2q] PTR (QM)? _ipps._tcp.local. PTR (QM)? _ipp._tcp.local. (45)
17:03:55.330407 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:03:55.330423 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:04:05.307308 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:04:05.307324 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:04:15.286180 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:04:15.286209 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:04:25.266785 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:04:25.266816 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:04:35.248474 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:04:35.248489 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:04:45.231873 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:04:45.231902 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:04:55.216288 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:04:55.216315 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:05:05.201924 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:05:05.201951 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:05:09.438461 IP6 hdebian > ip6-allrouters: ICMP6, router solicitation, length 8
17:05:15.188755 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:05:15.188799 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:05:25.176620 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:05:25.176648 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:05:32.931912 IP6 apalis-imx6-10692086.local > ip6-allrouters: ICMP6, router solicitation, length 16
17:05:35.165375 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:05:35.165399 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:05:45.155068 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:05:45.155082 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:05:54.813550 IP6 hdebian.mdns > ff02::fb.mdns: 0 [2q] PTR (QM)? _ipps._tcp.local. PTR (QM)? _ipp._tcp.local. (45)
17:05:54.851012 IP apalis-imx6-10692086.local.mdns > mdns.mcast.net.mdns: 0 [1a] PTR (QM)? _tezi._tcp.local. (71)
17:05:55.145920 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:05:55.145943 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:05:55.696822 IP6 apalis-imx6-10692086.local.mdns > ff02::fb.mdns: 0 [1a] PTR (QM)? _tezi._tcp.local. (71)
17:05:56.963151 IP hdebian.mdns > mdns.mcast.net.mdns: 0 [2q] PTR (QM)? _ipps._tcp.local. PTR (QM)? _ipp._tcp.local. (45)
17:06:05.136948 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:06:05.137104 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:06:15.128897 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:06:15.128918 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:06:25.121662 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:06:25.121682 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:06:35.114912 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:06:35.114943 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:06:45.108576 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:06:45.108599 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:06:55.102468 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:06:55.102501 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:07:05.096969 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:07:05.096994 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:07:15.091619 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:07:15.091647 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:07:25.088359 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:07:25.088385 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:07:35.085718 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:07:35.085753 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:07:45.083263 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:07:45.083291 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:07:55.080759 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:07:55.080782 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:08:05.078303 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:08:05.078344 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
17:08:15.075990 ARP, Request who-has hdebian (62:05:42:df:6f:c2 (oui Unknown)) tell apalis-imx6-10692086.local, length 28
17:08:15.076012 ARP, Reply hdebian is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
^C
88 packets captured
88 packets received by filter
0 packets dropped by kernel
Everything basically worked, without any freezing/slowness (please note
that during the test I wasn't using the VNC client, only the arping). I
also did it using screen with ssh/serial console disconnected.
Although I passed -U flag to arping, I still get replies. Is this
expected?
> note that you're getting bidirectional transfer due to the icmp errors.
>
> if you want to test unidirectionally, you need to send something that
> won't get a reply.
> for example an unsolicited arp reply (with arping)... or a udp packet
> to a port drop'ed by a firewall.
>
> and of course make sure you don't run it in such a way that you get
> ssh traffic causing bidirectional traffic.
> (ie. run it (and tcpdump) under screen)
> [this is assuming you can't run it directly on the device without
> getting in via ssh,
> maybe you can via serial port or whatever - though do note that serial
> wakeups could potentially also 'trigger' / 'fix' your hrtimer,
> so probably best to run things silently under screen with no direct
> output via ssh/serial/console.
I also tested by sending UDP packets with netcat, every 1 second:
```
while true
do
echo 'hi' | nc -u 192.168.11.2 5201
sleep 1
done
```
I also manually added the ARP entry to the table using the 'arp'
command, expecting I would get rid off ARP calls/replies, but it didn't.
Even though the ARP table is correct, I still see ARP calls. Also, I
can't get rid of ICMP packets, so at the end I couldn't truly test the
one-way direction communication. For example, this is a snippet from
tcpdump:
20:22:00.559786 IP 192.168.11.2.50323 > 192.168.11.1.5201: UDP, length 3
20:22:00.559857 IP 192.168.11.1 > 192.168.11.2: ICMP 192.168.11.1 udp port 5201 unreachable, length 39
20:22:01.563804 IP 192.168.11.2.44521 > 192.168.11.1.5201: UDP, length 3
20:22:01.563903 IP 192.168.11.1 > 192.168.11.2: ICMP 192.168.11.1 udp port 5201 unreachable, length 39
20:22:02.554294 ARP, Request who-has 192.168.11.2 tell 192.168.11.1, length 28
20:22:02.556414 ARP, Reply 192.168.11.2 is-at 62:05:42:df:6f:c2 (oui Unknown), length 28
20:22:02.569192 IP 192.168.11.2.56428 > 192.168.11.1.5201: UDP, length 3
20:22:02.569281 IP 192.168.11.1 > 192.168.11.2: ICMP 192.168.11.1 udp port 5201 unreachable, length 39
20:22:03.575838 IP 192.168.11.2.50178 > 192.168.11.1.5201: UDP, length 3
20:22:03.575903 IP 192.168.11.1 > 192.168.11.2: ICMP 192.168.11.1 udp port 5201 unreachable, length 39
20:22:03.717633 ARP, Request who-has 192.168.11.1 tell 192.168.11.2, length 28
20:22:03.717680 ARP, Reply 192.168.11.1 is-at be:8e:0a:23:00:70 (oui Unknown), length 28
20:22:04.582394 IP 192.168.11.2.41700 > 192.168.11.1.5201: UDP, length 3
20:22:04.582473 IP 192.168.11.1 > 192.168.11.2: ICMP 192.168.11.1 udp port 5201 unreachable, length 39
20:22:05.587417 IP 192.168.11.2.57901 > 192.168.11.1.5201: UDP, length 3
The same happens on both directions, host -> device and device -> host.
I couldn't see any slowness or freezing.
On Mon, Dec 18, 2023 at 03:34:36PM +0100, Oliver Neukum wrote:
>
>
> On 15.12.23 22:44, Maciej Żenczykowski wrote:
> > On Fri, Dec 15, 2023 at 1:20 PM Hiago De Franco <hiagofranco@xxxxxxxxx> wrote:
>
> Hi,
>
> > Here's my recommendation.
> > On the gadget side.
> > Print something when the timer is armed.
> > Print something when the timer fires.
> > Include the timestamp.
> >
> > Then try to send something (a single packet) that won't trigger a reply.
>
> You are implicitly raising a question.
> Does this bug strike if a single package is queued? The failure
> case seems to be 10 or 11 packages.
I think I will keep the same test but try to increase the number of
packages per second I'm sending, maybe one packet / 100 ms or something
like that.
>
> Regards
> Oliver
>
Best Regards,
Hiago.
