Compile with ACS about hostapd-rtl

[jekader]

Hi, good idea. Did you try to compile it with this option? Does it work OK with the realtek driver?

[alexschomb]

Sorry, I should have tried this first. I added it to hostapd/.config and recompiled. Startup with an ACS enabled configuration fails:

Configuration file: hostapd.conf
drv->ifindex=4
l2_packet_init: ioctl[SIOCGIFINDEX]: No such device
no br0 interface , let l2_sock_recv==l2_sock_xmit=0x0x9a36a8
wlan0: interface state UNINITIALIZED->COUNTRY_UPDATE
ACS: Automatic channel selection started, this may take a bit
ACS: Failed to request initial scan
wlan0: IEEE 802.11 Configured channel (0) not found from the channel list of current mode (1) IEEE 802.11g
wlan0: IEEE 802.11 Hardware does not support configured channel
Could not select hw_mode and channel. (-3)
wlan0: interface state COUNTRY_UPDATE->DISABLED
wlan0: AP-DISABLED
wlan0: interface state DISABLED->DISABLED
+rtl871x_sta_deauth_ops, ff:ff:ff:ff:ff:ff is deauth, reason=3
rtl871x_set_key_ops
rtl871x_set_key_ops
rtl871x_set_key_ops
rtl871x_set_key_ops
wlan0: AP-DISABLED
hostapd_free_hapd_data: Interface wlan0 wasn't started
ELOOP: remaining socket: sock=6 eloop_data=0x9a3738 user_data=(nil) handler=0x2b6ed

I also found the following comment in what appears to be the default config hostapd/defconfig. I guess it explains why we can't use ACS. We don't use a compatible driver.

# Automatic selection is currently only done through initialization, later on
# we hope to do background checks to keep us moving to more ideal channels as
# time goes by. ACS is currently only supported through the nl80211 driver and
# your driver must have survey dump capability that is filled by the driver
# during scanning.
#
# Supported ACS drivers:
# * ath9k
# * ath5k
# * ath10k