Zigbee and net socket collision with Zephyr v2.6.0-rc1-ncs1

[mnvcsUDT]

Hi everybody,

We ran into a Zephyr configuration issue which is related to Zigbee and Zephyr's networking stack. In our setup we would like to use Zephyr's modem library which also need CONFIG_NET_SOCKETS to be enabled. (in order to use cellular) When the Zigbee stack is enabled as well (CONFIG_ZIGBEE and CONFIG_ZIGBEE_ROLE_COORDINATOR) the incoming packets appear to be processed by the networking stack. This is not something we would like as the packages are then not processed by the ZBOSS stack. We confirmed this by disabling the Zigbee net interface. See below:

[00:00:19.019,744] <dbg> ieee802154_nrf5.nrf5_rx_thread: Frame received
[00:00:19.019,775] <dbg> ieee802154_nrf5.nrf5_rx_thread: Caught a packet (10) (LQI: 164)
[00:00:19.019,775] <err> ieee802154_nrf5: Packet dropped by NET stack

Our question is, what is the correct way to use Zigbee independently from Zephyr's networking stack?

Thanks a lot.

Milan

[mnvcsUDT]

Hi Marte, Got further in narrowing down the issue,

CONFIG_NET_SOCKETS_PACKET is the problem here. This config option seems to be necessary with Memfault integration. 

[Marte Myrvold]

Hi,

Thank you for clarifying.

I asked our developers about this. A similar issue to this has been addressed by the following fix: https://github.com/rlubos/zephyr/commit/46efe3ed70c98d08701cd3e660875e409aaf7e03. This should already be available on the master branch of NCS. Can you try to either switch to the master branch or add these changes to your project and see if it fixes the issue? Please let me know if it does not.

Best regards,

Marte