Wireless Ethernet Bridge Mode (WET Bridge Mode)

WET Bridge Mode allows Astra Machina to connect to a WiFi Network and then bridge the WiFI connection to wired ethernet devices connected to the ethernet port.

To Enable WET Bridge Mode

  1. Flash the platform with the WET enable image.

  2. Once bootup, create the WPA_Supplicant configuration file as shown below.

wpa_supplicant.conf for connecting to an WPA-PSK Wi-Fi network:

cat <<EOF > /etc/wpa_supplicant.conf
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
update_config=1
network={
   ssid="Guest"
   psk="0807-2520"
   key_mgmt=WPA-PSK
   proto=WPA2
   pairwise=CCMP TKIP
   group=CCMP TKIP
   scan_ssid=1
}
EOF

wpa_supplicant.conf for connecting to an open Wi-Fi network:

cat <<EOF > /etc/wpa_supplicant.conf
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
update_config=1
network={
   ssid="open-AP"
   key_mgmt=NONE
}
EOF

  1. To establish a connection, plug the Ethernet cable into both the platform and the laptop. The resulting connection will appear as follows:

../_images/wet_bridge_diagram.png

  1. Run the attached script to create the WET bridge.

set -x
iface=wlan0
briface=br0
ethiface=eth0
ifcmd=ifconfig
iwcmd=iw
brcmd=brctl
ipcmd=ip
wlcmd=wl.wet
dhdcmd=dhd.wet

$ifcmd $briface down
$brcmd delif $briface $ethiface
$brcmd delif $briface $iface
$brcmd delbr $briface

sleep 1

$ifcmd $iface up
$wlcmd mpc 0
$wlcmd PM 0
$wlcmd up

wpa_supplicant -B -Dnl80211 -i wlan0 -c /etc/wpa_supplicant.conf
sleep 10

$wlcmd status
sleep 2

$iwcmd dev $iface set 4addr on
$brcmd addbr $briface
$brcmd addif $briface $ethiface
$brcmd addif $briface $iface
$brcmd show
sleep 2

kill $(ps | grep udhcpc | grep $iface | awk 'FNR == 1 {print $1}') > /dev/null 2>&1
kill $(ps | grep udhcpc | grep $briface | awk 'FNR == 1 {print $1}') > /dev/null 2>&1
sleep 1

mac=$($wlcmd cur_etheraddr | awk '{print $2}')
echo mac $mac
$dhdcmd -i $iface wet 1
$dhdcmd -i $iface wet_host_mac $mac
sleep 1

#dhclient -v $briface
udhcpc -i $briface -b

ipv4=$($ipcmd -4 addr show $briface | awk -F '[ /\t]+' '$2=="inet"{print $3; exit}')
echo ipv4 $ipv4

$dhdcmd -i $iface wet_host_ipv4 $ipv4

  1. Laptop should able to get the IP and able to browse internet.