question regarding use_monitor for nl80211 driver

Izoard, CedricX cedricx.izoard
Mon Sep 29 09:17:37 PDT 2014


We're facing issue with full mac driver, when creating p2p groups.

The driver reports it support ap_sme but not probe command nor tx data status, so use_monitor is set to 1 in wpa_driver_nl80211_capa.
Then when setting up the AP for the p2p group, because of (device_ap_sme=1 and use_monitor=1) the supplicant doesn't register handler for management frame and then action frames sent to the p2p group are not processed.

On kitkat baseline, there is patch that force use_monitor to 0 if driver support WPA_DRIVER_FLAGS_OFFCHANNEL_TX (commit aec9e647dab45c87511f822f6f9468800ec6f3b1 "AOSP: nl80211 use_monitor hack")
Since L-dessert is using upstream supplicant this patch is not present, and several tests regarding p2p service discovery or p2p presence request are failing because there is no handler to process those action frames.

Isn't use_monitor irrelevant if device_ap_sme is set ?
What would be the correct way to fix this issue ?  at supplicant level or driver level ?

Best regards,

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