#!/bin/sh
loggerName=tcpdump.sh

Open_Protocol_Start(){
   logfile=/var/run/op.dump
   CFG=/home/tool/config/OpenPrtclCfg.json
   port=`grep '"port":' $CFG | awk '{print $2}' | sed 's/"//g' | sed 's/,//'`   
   logger -s -t $loggerName "Start tcpdump Open Protocol <$port>" &> /var/run/op.log
   #tcpdump -i eth0 -p -n -A -q port 4545 > /var/log/op.dump &
   #tcpdump -i eth0 -p -n -A -q -l port $port | egrep "IP|001" > /var/log/op.dump  &
   rm $logfile 
   tcpdump -i tiwlan0 -s 0 port $port -w $logfile >> /var/run/op.log 2>&1  &
   exit 0
}
XML_Start(){
   logfile=/var/run/xml.dump
   CFG=/home/tool/config/vwXmlCfg.json
   portA=`grep '"myValue":' $CFG | awk '{print $2}' | sed 's/"//g' | sed 's/,//' | sed -n 12p`   
   portB=`grep '"myValue":' $CFG | awk '{print $2}' | sed 's/"//g' | sed 's/,//' | sed -n 14p` 
   logger -s -t $loggerName "Start tcpdump XML Protocol <$portA,$portB>" &> /var/run/op.log
   rm $logfile 
   tcpdump -i tiwlan0 -s 0 port $portA or $portB -w $logfile >> /var/run/xml.log 2>&1  &
   exit 0
}
IPM_Start(){
   logfile=/var/run/ipm.dump
   CFG=/home/tool/config/ipm/ipmgateway-config.xml
   port=`grep 'IPMIPPort=' $CFG | awk '{print $3}' | sed 's/"//g' | sed 's/IPMIPPort=//'`
   logger -s -t $loggerName "Start tcpdump IPM Protocol <port>" &> /var/run/op.log
   rm $logfile 
   tcpdump -i tiwlan0 -s 0 port $port -w $logfile >> /var/run/ipm.log 2>&1  &
   exit 0
}

case "$1" in
    op)
    Open_Protocol_Start
    ;;
    xml)
    XML_Start   
    ;;
    ipm)
    IPM_Start
    ;;
    profinet)   
    logger -s -t $loggerName "Profinet not supported"
    ;;
    stop)
    kill $(pidof tcpdump)
    logger -s -t $loggerName "Stop tcpdump"
    ;;
    status)
    if pidof tcpdump; then exit 0; else exit 1; fi
    ;;
    *)
    logger -s -t $loggerName "Invalid Command <$1>"
    ;;
  esac  
logger -s -t $loggerName "Exit 0"
exit 0