[DPP] Issue with WPA-Enterprise - GAS Comeback Delay

[Gustavo Bertoli]

Hi all,

I am working on DPP with WPA-Enterprise. In this scenario, DPP
Configurator needs time to process the CSR and return the certBag
back to the Enrollee (multiple comeback requests/responses).

In my tests, the DPP Configurator correctly sends GAS Initial/Comeback
Response frames with a comeback delay of 500ms. The Enrollee
respects these delays and schedules the first retries, but does not work
for longer processing times required by the DPP Configurator.

I suspect that the global GAS query timeout (2s) in gas_query.c may be
the cause, as it does not extend when multiple Comeback Delays are
received. Checking the test script (test_dpp.py), it seems that with hwsim
the processing of CSR and back to the Enrollee with the certBag is
possible under 2s.

Any opinions on changing gas_query_tx_comeback_req_delay() in
gas_query.c to also extend the global timer for gas_query_timeout?

Thank you in advance,
Gustavo