#!/bin/bash


if [[ 'X' == "X$1" ]]
 then
   SRC='/var/log/syslog.all'
   CAT='cat'
   OUT='/tmp/ntp-clients.txt'
 else
   SRC="$1"
   ext=${SRC##*.}
   if [[ 'gz' == "${ext}" ]]
    then
      CAT='zcat'
      bn=$(basename ${SRC})
      dt=$(echo "${bn}" | awk -F'-' '{print $2}' | awk -F'.' '{print $1}')
      OUT="/var/log/ntp-clients/clients-${dt}.txt"
      if [[ ! -d /var/log/ntp-clients ]]
       then
         mkdir /var/log/ntp-clients
       fi
    else
      CAT='cat'
      OUT='/tmp/ntp-clients.txt'
    fi
 fi
 
#cat /var/log/syslog.all | grep 'INCOMING NTP' | awk -F'=' '{print $5}' | awk '{print $1}' | sort -un | while read num

echo "${CAT} ${SRC} ${ext}"

${CAT} ${SRC} | grep 'INCOMING NTP' | grep -o "SRC=[^ ]* " | sed 's/SRC=//' | sort -u | while read num
 do 
   name=$(dig -x $num +short | head -1)
   if [[ 'X' == "X${name}" ]]
    then
      name='###'
    fi
   cnt=$(${CAT} ${SRC} | grep 'INCOMING NTP' | grep -c ${num})
   echo "$num $name $cnt"
 done > ${OUT}