#!/bin/bash
#
# udp2raw startup script for the Udp2Raw Server
#
#
# chkconfig: 345 80 20
# description: start the udp2raw deamon
#
# Source function library
. /etc/rc.d/init.d/functions

prog=Udp2Raw-Server
#程序目录
HOME_DIR=/usr/local/udptools
#程序文件名
BIN_NAME=udp2raw_x86
#配置文件
CONFIG_FILE=$HOME_DIR/udp2raw-server.conf
#日志文件
LOG_FILE=$HOME_DIR/udp2raw-server.log

#Function
checkSet(){
  #获取监听端口
  SERVER_PORT=`cat $CONFIG_FILE | grep '\-l ' | awk -F ":" '{print $2}'`
  #检查iptables规则
  IPTALBES=`iptables -nvL | grep DROP | grep tcp | grep $SERVER_PORT`
  if [ ! -n "$IPTALBES" ]; then
    echo "Adding iptables rules."
    #添加iptables规则
    RULES=`$HOME_DIR/$BIN_NAME --conf-file $CONFIG_FILE -g | grep iptables |grep -v rule`
    $RULES
  fi
  #赋权
  setcap cap_net_raw+ep $HOME_DIR/$BIN_NAME
}

start(){
  checkSet
  #启动进程
  sudo -u nobody -b $HOME_DIR/$BIN_NAME --conf-file $CONFIG_FILE >> $LOG_FILE 2>&1
}

stop(){
  #结束进程
  PID=`ps aux|grep $BIN_NAME|grep $CONFIG_FILE|grep -v root|grep -v grep | awk '{print $2}'`
  kill $PID >/dev/null 2>&1
}

status(){
  PID=`ps aux|grep $BIN_NAME|grep $CONFIG_FILE|grep -v root|grep -v grep | awk '{print $2}'`
  if [ ! -n "$PID" ]; then
    echo "$prog is stopped."
  else
    echo "$prog is running. pid $PID"
  fi
}

showLog(){
  cat $LOG_FILE | tail -n 50
}

case "$1" in
start)
    echo "Starting $prog..."
    start
    ;;
    
stop)
    echo "Stopping $prog..."
    stop
    ;;

restart)
    echo "Stopping $prog..."
    stop
    sleep 2
    echo "Starting $prog..."
    start
    ;;
    
status)
    status
    ;;
    
log)
    showLog
    ;;
    
*)
    echo "Usage: $prog {start|stop|restart|status|log}"
    ;;
esac
exit 0