#!/bin/sh /etc/rc.common
# Copyright (C) 2006-2010 OpenWrt.org
# Copyright (C) 2015-09-22 by yuxw.

START=99
STOP=50

. /lib/functions/leds.sh


#***********************************************************
# ETH_IN_DISABLE_4G: 	1, auto 3g,eth  wan
			0: 3g allways, eth lan
#***********************************************************

ETH_IN_DISABLE_4G="0"

ETH_WAN_OK_DISABLE_4G="1"

DATE=`date '+%F %T'`
USE_PROCD=1
PROG=/bin/usbdongled

PROC_NAME=usbdongled

ctrl_3g_power_file=/sys/class/gpio/3g_power/value

led_3g_green=/sys/class/leds/3g_green/brightness
led_3g_red=/sys/class/leds/3g_red/brightness

eth_sys=/sys/class/net/eth0.2/carrier

init_file=/var/run/usbdongle_init

lock_file_stop=/var/run/usbdongle_lock_stop
lock_file_start=/var/run/usbdongle_lock_start

eth_green_led=/sys/class/leds/eth_green/brightness


eth_state="`cat $eth_sys`"

eth_wan_led="`cat $eth_green_led`"


LOG()
{
	echo $1 >> /var/run/debug_usbdongle
}

DONGLE_LOCK()
{
	while [  -f "$lock_file_stop" -o  -f "$lock_file_start" ]
	do
		LOG "$DATE  sleep."
		sleep 3
	done
}

DONGLE_UNLOCK()
{
	rm -f $1

}

led_turn_off_3g_green()
{
	led_off 3g_green
}

led_turn_on_3g_green()
{
	led_on 3g_green
}


led_turn_off_3g_red()
{
	led_off 3g_red
}

led_turn_on_3g_red()
{
	led_on 3g_red
}




enable_3g_power()
{
	echo 1 > $ctrl_3g_power_file
}

disable_3g_power()
{
	echo 0 > $ctrl_3g_power_file
}

####################################
#
#  		START
#
###################################
start_service()
{
	DONGLE_LOCK
	touch $lock_file_start


	LOG "$DATE +++ START usbdongled + start +"
	killall -9 $PROC_NAME

	if [ $ETH_IN_DISABLE_4G == "1" ];then
		#echo "eth_state = $eth_state "
		if [ $eth_state = "1" -a ! -f "$init_file" ]; then
			touch $init_file
		 	LOG "first init because eth is inserted."
			led_turn_off_3g_green
			led_turn_off_3g_red

			DONGLE_UNLOCK $lock_file_start

			disable_3g_power
			LOG "$DATE ETH_IN_DISABLE_4G = 1 "
			return
		fi
	fi

	if [ $ETH_WAN_OK_DISABLE_4G == "1" ];then
		#echo "eth_wan_led: $eth_wan_led"
		if [ $eth_wan_led = "255" ];then
			LOG "wan is eth, return."
			led_turn_off_3g_green
			led_turn_off_3g_red

			DONGLE_UNLOCK $lock_file_start
			disable_3g_power

			LOG "$DATE ETH_WAN_OK_DISABLE_4G = 1 "

			return
		fi
	fi

	led_turn_off_3g_green
	led_turn_on_3g_red

	LOG "+++++ Start usbdongled"
	enable_3g_power
	$PROG &

	LOG "$DATE +++ START usbdongled + end +"
	DONGLE_UNLOCK $lock_file_start
}



####################################
#
#  		STOP
#
###################################
stop_service()
{

	DONGLE_LOCK
	touch $lock_file_stop

	LOG "$DATE --- STOP usbdongled + start +"

	led_turn_off_3g_green
	led_turn_off_3g_red

	LOG "---- Stop usbdongled"
	killall -9 $PROC_NAME

	killall -9 pppd
	disable_3g_power
	sleep 1
	LOG "$DATE --- STOP usbdongled - end -"

	DONGLE_UNLOCK $lock_file_stop
}


reload_service()
{
	stop_service
	start_service
}