DTLS (CoAP) Client not receiving Close Notify alert

RE: DTLS (CoAP) Client not receiving Close Notify alert

Hakon — Thu, 10 Oct 2024 10:26:32 GMT

Okay, it's hard to proceed without having more information. Can you post the application log and a full modem trace (.bin or .mtrace file)? Also, it would be really helpful if you could provide the complete setup to reproduce the issue.

RE: DTLS (CoAP) Client not receiving Close Notify alert

Povilas S — Thu, 10 Oct 2024 09:36:00 GMT

I don't, and correct me if I am wrong, but the logs you've posted are from CoAP sample and lib? How would it help? The code I've posted is polling socket directly, it is not using any CoAP abstraction for it, only when there is data received from the socket that it gets then parsed using CoAP lib. Am I missing something?

RE: DTLS (CoAP) Client not receiving Close Notify alert

Hakon — Thu, 10 Oct 2024 09:05:59 GMT

That is kinda strange. You don't get something like this?

RE: DTLS (CoAP) Client not receiving Close Notify alert

Povilas S — Wed, 09 Oct 2024 15:14:01 GMT

I don't see any new info coming after enabling these.

RE: DTLS (CoAP) Client not receiving Close Notify alert

Hakon — Tue, 08 Oct 2024 13:53:29 GMT

[quote user="Povilas S"]Nothing much to show from log, since data is missing. [/quote]

you can try to enable

CONFIG_COAP_LOG_LEVEL_DBG=y
CONFIG_NET_LOG=y

That will provide more detailed log output.

RE: DTLS (CoAP) Client not receiving Close Notify alert

Povilas S — Wed, 02 Oct 2024 14:45:18 GMT

Nothing much to show from log, since data is missing. As I have mentioned, POLLIN arrives and I am able to call recv() after that. But I am not receiving any of the other "events". Nothing much to add, wireshark shows that close_alert arrives to the device, but it gets lost between that and poll().
Do you have any DTLS setup where you able to receive POLLHUP?

RE: DTLS (CoAP) Client not receiving Close Notify alert

Hakon — Wed, 02 Oct 2024 14:37:03 GMT

Hello,

do you have an application log from this? Can you also describe in detail what you are doing on the client side and also describe your setup in detail?