#!/bin/bash

# Title:        AirBridge
# Author: 	0i41E
#
# Description: A payload to enable WiFi on the Squirrel, when a WiFi Adapter is attached.

# Requirements beforehand: opkg update && opkg install usb-modeswitch, MK7AC Module or similar WiFi Adapter.
# Usage: Connect with payload switch selected, and wait for the magenta LED, insert WiFi adapter, press button.

# Set Network mode 
NETMODE BRIDGE
# Starting SSH & Web Interface
SSH_START
UI_START

LED M FAST

BUTTON

LED G FAST

SSID="<SSID>" # Station SSID
PASSPHRASE="<Passphrase>" # Passphrase
EXTERNAL_HOST="8.8.8.8" # Host to verify connection
WLAN_INTERFACE="wlan0"

# Removing old wpa_supplicant.conf file
rm /etc/wpa_supplicant.conf

# Check if wlan interface is up
if ! ip link show $WLAN_INTERFACE | grep -q "state UP"; then
    ip link set $WLAN_INTERFACE
else
    echo "$WLAN_INTERFACE is already up."
fi

# Create wpa_supplicant.conf file
cat > /etc/wpa_supplicant.conf <<EOF
ctrl_interface=/var/run/wpa_supplicant

network={
    ssid="$SSID"
    psk="$PASSPHRASE"
}
EOF


# Start wpa_supplicant
wpa_supplicant -B -i "$WLAN_INTERFACE" -c /etc/wpa_supplicant.conf

# Obtain IP address via DHCP
udhcpc -i "$WLAN_INTERFACE"

# Check connectivity to the external host
if ping -c 1 $EXTERNAL_HOST; then
    C2NOTIFY INFO AirBridge initiated!
    LED G SOLID
else
    LED R SOLID
fi