#!/bin/bash
Green_font="\033[32m" && Red_font="\033[31m" && Font_suffix="\033[0m"
Info="${Green_font}[Info]${Font_suffix}"
Error="${Red_font}[Error]${Font_suffix}"
echo -e "${Green_font}
#=================================================
# Project:  tcp_nanqinlang lkl-rinetd
# Platform: --Debian&&Ubuntu --openvz --singleNIC
# Author: nanqinlang
# Blog:   https://sometimesnaive.org
# Github: https://github.com/nanqinlang
#=================================================${Font_suffix}"

check_system(){
	#sort
	[[ -z "`cat /etc/issue | grep -iE "debian"`" && -z "`cat /etc/issue | grep -iE "ubuntu"`" ]] && echo -e "${Error} only support Debian !" && exit 1
	#bit
	[[ "`uname -m`" != "x86_64" ]] && echo -e "${Error} only support 64bit !" && exit 1
}

check_root(){
	[[ "`id -u`" != "0" ]] && echo -e "${Error} must be root user !" && exit 1
}

check_ovz(){
	apt-get update && apt-get install -y virt-what
	[[ "`virt-what`" != "openvz" ]] && echo -e "${Error} only support OpenVZ and LXC"
}

check_requirement(){
	# check iptables
	apt-get install -y iptables

	# check "iptables grep cut xargs ip awk"
	for CMD in iptables grep cut xargs ip awk
	do
		if ! type -p ${CMD}; then
			echo -e "${Error} requirement not found, please check !" && exit 1
		fi
	done
}

directory(){
	[[ ! -d /home/tcp_nanqinlang ]] && mkdir -p /home/tcp_nanqinlang
	cd /home/tcp_nanqinlang
}

download(){
	wget --no-check-certificate https://raw.githubusercontent.com/tcp-nanqinlang/lkl-rinetd/master/module/rinetd
	[[ ! -f rinetd ]] && echo -e "${Error} rinetd download failed, please check !" && exit 1
	chmod +x rinetd
}

config-port(){
	echo -e "${Info} 输入你想加速的端口"
	read -p "(多个端口号用空格隔开。不支持端口段。默认使用 8080):" ports

	if [[ -z "${ports}" ]]; then
		echo -e "0.0.0.0 8080 0.0.0.0 8080\c" >> config-port.conf
	else
		for port in ${ports}
		do
			#可以换行写入配置
			echo "0.0.0.0 ${port} 0.0.0.0 ${port}" >> config-port.conf
		done
	fi
}

config-rinetd(){
	# single NIC
	IFACE=`ip -4 addr | awk '{if ($1 ~ /inet/ && $NF ~ /^[ve]/) {a=$NF}} END{print a}'`
	echo -e "#!/bin/bash \ncd /home/tcp_nanqinlang \nnohup ./rinetd -f -c config-port.conf raw ${IFACE} &" >> config-rinetd.sh && chmod +x config-rinetd.sh
}

self-start(){
	sed -i "s/exit 0/ /ig" /etc/rc.local
	echo -e "\n/home/tcp_nanqinlang/config-rinetd.sh\c" >> /etc/rc.local
	chmod +x /etc/rc.local
}

run-it-now(){
	./config-rinetd.sh
}

install(){
	check_system
	check_root
	check_ovz
	check_requirement
	directory
	download
	config-port
	config-rinetd
	self-start
	run-it-now
	status
}

status(){
	if [[ ! -z `ps -A | grep rinetd` ]]; then
		echo -e "${Info} tcp_nanqinlang is running !"
		else echo -e "${Error} tcp_nanqinlang not running, please check !"
	fi
}

uninstall(){
	check_root
	kill -9 `ps -A | grep rinetd | awk '{print $1}'`
	rm -rf /home/tcp_nanqinlang
	iptables -t raw -F
	sed -i '/\/home\/tcp_nanqinlang\/config-rinetd.sh/d' /etc/rc.local
	echo -e "${Info} uninstall finished."
}



echo -e "${Info} 选择你要使用的功能: "
echo -e "1.安装 rinetd-bbr\n2.检查 rinetd-bbr 运行状态\n3.卸载 rinetd-bbr"
read -p "输入数字以选择:" function

while [[ ! "${function}" =~ ^[1-3]$ ]]
	do
		echo -e "${Error} 无效输入"
		echo -e "${Info} 请重新选择" && read -p "输入数字以选择:" function
	done

if   [[ "${function}" == "1" ]]; then
	install
elif [[ "${function}" == "2" ]]; then
	status
else
	uninstall
fi