#!/bin/sh
# Copyright (C) 2020 Ycarus (Yannick Chabanois) <ycarus@zugaina.org> for OpenMPTCProuter

[ "$ACTION" = "add" ] || [ "$ACTION" = "bind" ] || exit
[ -n "${INTERFACE}" ] || exit
[ -n "${DEVPATH}" ] || exit

. /lib/functions.sh

_set_intf_name() {
	local intfname=$1
	local device
	local ifname
	config_get device $intfname device
	config_get modalias $intfname modalias
	config_get ifname $intfname ifname
	config_get type $intfname ifname
	if [ "$type" = "tunnel" ] || [ "$type" = "bridge" ]; then
		return
	fi
	[ -n "$modalias" ] && {
		if [ -f /sys/class/net/${INTERFACE}/device/uevent ]; then
			mac=""
			if [ -f /sys/class/net/${INTERFACE}/address ]; then
				mac="$(cat /sys/class/net/${INTERFACE}/address | tr -d '\n')"
			fi
			chk_modalias=$MODALIAS
			[ -z "$chk_modalias" ] && chk_modalias="$(cat /sys/class/net/${INTERFACE}/device/uevent | grep MODALIAS | cut -d '=' -f2 | tr -d '\n')"
			if [ -n "$chk_modalias" ]; then
				chk_modalias="${chk_modalias}-${mac}"
				logger -t "OMR-Rename" "modalias: $modalias - chk_modalias: $chk_modalias - ifname: $ifname - INTERFACE: $INTERFACE"
				if [ "$modalias" = "$chk_modalias" ] && [ "$INTERFACE" != "$ifname" ]; then
					logger -t "OMR-Rename" "Rename ${INTERFACE} to ${ifname}"
					existif="0"
					ip link set ${INTERFACE} down 2>&1 >/dev/null
					[ "$(ip link show ${ifname} 2>/dev/null)" != "" ] && {
						ip link set ${ifname} name ${ifname}tmp 2>&1 >/dev/null
						existif="1"
					}
					ip link set ${INTERFACE} name ${ifname} 2>&1 >/dev/null
					ip link set ${ifname} up 2>&1 >/dev/null
					[ "$existif" = "1" ] && ip link set ${ifname}tmp name ${INTERFACE} 2>&1 >/dev/null
				fi
			fi
		elif [ -f /dev/${DEVICE_NAME} ] && [ -n "$MODALIAS" ] && [ "$modalias" = "$MODALIAS" ]; then
			if [ "$device" != "/dev/${DEVICE_NAME}" ]; then
				ln -s /dev/${DEVICE_NAME} /dev/$intfname
				uci -q set network.${intfname}.device="/dev/${intfname}"
			fi
		fi
	}
	[ -z "$modalias" ] && [ -n "$device" ] && [ -n "$ifname" ] && [ "/sys${DEVPATH}" = "$device" ] && [ "$INTERFACE" != "$ifname" ] && {
		logger -t "OMR-Rename" "device: $device - devpath: $DEVPATH - ifname: $ifname - INTERFACE: $INTERFACE"
		logger -t "OMR-Rename" "Rename ${INTERFACE} to ${ifname}"
		ip link set ${INTERFACE} down 2>&1 >/dev/null
		existif="0"
		[ "$(ip link show ${ifname} 2>/dev/null)" != "" ] && {
			ip link set ${ifname} name ${ifname}tmp 2>&1 >/dev/null
			existif="1"
		}
		ip link set ${INTERFACE} name ${ifname} 2>&1 >/dev/null
		ip link set ${ifname} up 2>&1 >/dev/null
		[ "$existif" = "1" ] && ip link set ${ifname}tmp ${INTERFACE} 2>&1 >/dev/null
	}
}

if [ "$(uci -q get openmptcprouter.settings.disableintfrename)" != "1" ]; then
	config_load network
	config_foreach _set_intf_name interface
#	config_foreach _set_intf_name interface
fi