#!/bin/bash

lock_path="/var/run/"
run="pppd"
config="hc-interface.conf"
tmp="/tmp/ppp_tmp"
version=1.0

function start()
{
	test  -f /etc/ppp/peers/chat_connect || { echo "not install lte！" ; exit 1; }
	#删除默认网关
	route del default
	lock=$lock_path"$1.mypid"
	#检测是否已运行
	test ! -f $lock || { echo "$run apparently already active,  start aborted!" ; exit 1; }
	echo "start $run $1"	
	#记录下拨号时间
	date +%s > $tmp
	$run call fdd_tdd_wcdma_option > /var/log/ppp4g &
	#pid
	echo $! > $lock
}

function init()
{
	if (lsusb |grep -q 19d2:1476)
	then
	if [ -r /dev/ttyUSB1 ]
	then
	echo "AT+ZSDT=1" >/dev/ttyUSB1 
	echo "AT+ZRST" > /dev/ttyUSB1
	echo "4g init done"
	else
	echo "lte no match"
	fi
	else
	echo "no found lte module"
	fi

}

function stop()
{
	lock=$lock_path"$1.mypid"
	test -f $lock || { echo "$run may be sotped already" ; return 1; }
	echo "stop $run $1"
	#杀死进程
	local pid=`cat $lock`
	kill $pid
	rm -f $lock
	#echo "AT+ZRST" > /dev/ttyUSB1	
	#修改默认网关
	#default_gw=`p_get wan.gw`
	#if [ -z "$default_gw" ]; then
	#	route add default `p_get wan.iface`
	#else
	#	route add default gw  $default_gw  `p_get wan.iface`
	#fi
}

function status()
{
	lock=$lock_path"$1.pid"
	test ! -f $lock && echo "PPP-4G=off" || echo "PPP-4G=on"
	now=`date +%s`
	#已经拨号时间
	echo ppp_keep_time=$(( $now - `cat $tmp` ))
}

# do it
case $1 in
	reset|init)
			stop
			init 
		;;
	on|start)

		if [ -z "$2" ]; then
			start  "ppp0"
		else 
			start $2
		fi	
		;;
	off|stop)
		if [ -z "$2" ]; then
			stop  "ppp0"
		else 
			stop $2
		fi
		;;
	restart|--restart)
		if [ -z "$2" ]; then
			stop   "ppp0"
			sleep 2
			start  "ppp0"
		else 
			stop  $2
			sleep 2
			start $2
		fi
		;;
	status|--status)
		if [ -z "$2" ]; then
			status  "ppp0"
		else 
			status $2
		fi
		;;
	version)
		echo "$version"
		;;
	*)
		echo "Usage: $0 {start|stop|restart|status}"
esac