EmbeddedOS/wifi

Virtual WLAN (Wireless Local Area Network)

WiFi

What is it?

• Everything about wifi:
  • 1. Documentation.
  • 2. WiFi client with raw socket in C.
  • 3. Virtual 802.11 kernel module to emulate wireless (WiFi) network.

Load The kernel module to emulate hw

Using mac80211_hwsim module

• mac80211_hwsim

• Load module:

sudo modprobe mac80211_hwsim radios=2 dyndbg=+p

• Enable monitor mode:

sudo ifconfig wlan0 down
sudo iwconfig wlan0 mode Monitor
sudo ifconfig wlan0 up

• (Optional) monitor with tcpdump:

sudo tcpdump -i wlan0

• Start a access point with hostapd (hostapd-guide):

sudo hostapd -i wlan0 hostapd.conf -dd

• Test connect access point with (wpa_supplicant):

sudo wpa_supplicant -c wpa_supplicant.conf -i wlan1

• Monitor all wifi network:

sudo ifconfig hwsim0 up
sudo tcpdump -i hwsim0 -v

Using our virtual mac80211 kernel module (TODO)

sudo insmod vwlan.ko