check_tcp_ports

#!/bin/bash
#
# Monitor multiple ports
# Requiers nc
# Felipe Ferreira 07/2016

TRUNTIME=0
MSG=""

function help() {
 echo "$0 <server> <time> <port> <port>"
 echo "$0 nagios 300 80 443"
 exit 1;
}

if [ $# -lt 2 ];then
 help
fi

for word in "$@"
do
 for args in $word
 do
  AP[$i]="$args"
  i=$(expr $i + 1)
 done
done

#GO THRU ARRAY
#echo " go thru array"
i=0
E=${#AP[@]}
if [ $E -lt 3 ]; then
 echo "UNKOWN - wrong number of arguments"
 help
fi

SERVER=${AP[$i]}
re='^[0-9]+([.][0-9]+)?$'
if ! [[ $SERVER =~ $re ]] ; then
# echo "Geting IP address"
 SERVER=$(getent hosts $SERVER|awk '{ print $1}')
# echo $SERVER
fi

i=$(expr $i + 1)
TIME=${AP[$i]}
i=$(expr $i + 1)
while [ $i -lt $E ]
do
 PORT=${AP[$i]}
 TS=$(date +%s%3N)
# echo "Checking $SERVER $PORT less then $TIME"
 check_port=$(nc -n -w 2 -z $SERVER $PORT 2>&1; echo -n "|EXIT:"$?)
 IFS="|";
 exit_code=$(echo -e $check_port|grep "EXIT:"|awk -F":" '{print $2}')
 result=$(echo $check_port|grep -v "EXIT:")
 TE=$(date +%s%3N)
 #echo "TE $TE TS $TS"
 RUNTIME=$(($TE-$TS))
# echo "RUNTIME: $RUNTIME"

 if [[ $exit_code == 0 ]]; then
  MSG="port $PORT(${RUNTIME}ms) $MSG"
 else
  echo "CRITICAL - $SERVER $PORT failed - critical|time="$RUNTIME"ms"
  exit 2
 fi
 i=$(expr $i + 1)
 TRUNTIME=$(($TRUNTIME+$RUNTIME))
done

if [ $TRUNTIME -gt $TIME ]; then
 MSG="CRITICAL - took longer then $TIME to connecto to $SERVER $MSG  |time="$TRUNTIME"ms"
 echo $MSG
 exit 2
fi

MSG="OK - $SERVER $MSG"
echo "$MSG|ports_ms=$TRUNTIME"
exit 0