This will be a long journey…
LuCI should be the most easy way to setting router.
I will study from start, try to learn how uci system works and how LuCI works with current openwrt system.
I know something about C/C++, maybe RF, PCB layout or even physics, but I am absolutely a noob of script especially bash.
Lucky me, 50% UCI system is based on shell script. 🙂 So I have a chance to learn it.
For wifi turn on or turn off, all I know is the magic command “wifi”, so what is it?
I find it actually a script, its path can be found by call “which wifi”
interface code of /sbin/wifi
case "$1" in down) wifi_updown "disable" "$2";; detect) wifi_detect_notice ;; config) wifi_config ;; status) ubus_wifi_cmd "status" "$2";; reload) wifi_reload "$2";; reload_legacy) wifi_reload_legacy "$2";; --help|help) usage;; *) ubus call network reload; wifi_updown "enable" "$2";; esac
After couple of hours painful decode wifi script, looks like once we call wifi, it will goto ‘*) ubus call network reload; wifi_updown “enable” “$2”;;
I reach a dead end at the beginning. What is this “ubus call network reload”? Is it an important part of uci system? I directly run it in command line, nothing happens…OK, ignore it.
PS: That’s why I hate script, you will be very hard to find what it is exactly doing.
Next it is “wifi_updown enable”. Good name, from its name I know it is able to control enable/disable wifi.
_wifi_updown() {
for device in ${2:-$DEVICES}; do (
config_get disabled "$device" disabled
[ "$disabled" = "1" ] && {
echo "'$device' is disabled"
set disable
}
config_get iftype "$device" type
if eval "type ${1}_$iftype" 2>/dev/null >/dev/null; then
eval "scan_$iftype '$device'"
eval "${1}_$iftype '$device'" || echo "$device($iftype): ${1} failed"
elif [ ! -f /lib/netifd/wireless/$iftype.sh ]; then
echo "$device($iftype): Interface type not supported"
fi
); done
}
wifi_updown() {
cmd=down
[ enable = "$1" ] && {
_wifi_updown disable "$2"
ubus_wifi_cmd "$cmd" "$2"
scan_wifi
cmd=up
}
ubus_wifi_cmd "$cmd" "$2"
_wifi_updown "$@"
}
$DEVICE, this should come from scan_wifi.
wifi script it will read /lib/wifi/mt7628.sh, and once we run wifi, it will call function in mt7628.sh, scan_mt7628/enable_mt7628/disable_mt7628 and all the parameters are from /etc/config/wireless.
To Be Continue…