RTL8812AU linux driver with monitor mode and frame injection

This RTL8812AU driver based on https://github.com/ulli-kroll/rtl8821au branch v4.3.22-beta/rework. According to rtw_version.c the real driver version is 4.3.20.

for building type

$ make

The branch v4.3.21 may be built for RTL8814AU or RTL8812AU/RTL8821AU. Edit Makefile accordingly.

for setting monitor mode

1. Set interface down # ip link set wlan0 down
2. Set monitor mode # iwconfig wlan0 mode monitor
3. Set interface up # ip link set wlan0 up

for switching channels (interface must be up)

Set channel 6, width 40 MHz

# iw wlan0 set channel 6 HT40-

Set channel 149, width 80 MHz

# iw wlan 0 set freq 5745 80 5775

to inject frames with b/g rates use the Rate field in the radiotap header

to inject frames with n rates use the MCS field in the radiotap header

to inject frames with ac rates use the VHT field in the radiotap header