helper

#!/bin/bash
set -e

print_title () {
  echo "-|-------------------------------------------------------"
  echo "| IP Address ------------ | Stat ---------------------- |"
  echo "-|-------------------------------------------------------"
}

docs () {
  echo ""
  echo "command [option] params"
  echo "|"
  echo "|--> option :"
  echo -e "|"
  echo -e "| -h \t\t --help \t\t\t\t show help list"
  echo -e "| -d \t\t --domain [param] \t\t\t scan ip domain"
  echo -e "| -l \t\t --list-domain [param] \t\t\t scan ip on listed domain"
  echo -e "| -r \t\t --range [prefix] [begin] [end] \t scan ip in range"
  echo "|"
  echo "-]PINGTESTER"
  echo ""
}

is_valid_ip () {
  idx=0
  prefix=$(echo $1 | tr "." "\n")
  declare -a prefixIdx=(nil nil nil)
  
  for item in $prefix
  do
    prefixIdx[idx]=$item
    idx=$idx+1
  done
  
  if 
    [[ ${prefixIdx[0]} -gt 255 ]] ||
    [[ ${prefixIdx[1]} -gt 255 ]] ||
    [[ ${prefixIdx[2]} -gt 255 ]] ||
    [[ ${prefixIdx[0]} -lt 1 ]] ||
    [[ ${prefixIdx[1]} -lt 0 ]] ||
    [[ ${prefixIdx[2]} -lt 0 ]] ||
    [[ ${prefixIdx[2]} = "nil" ]]
  then
    echo 1; return 1; break
  else
    echo 0; return 0
  fi
}

lets_rock_up () {
  for (( i=$2 ; i<=$3 ; i++ )); do
    packet_loss=$(ping $1.$i -t 1 | grep "packet loss" | awk '{print $7}')
    if [[ $packet_loss = "100.0%" ]]; then
      if [[ $i -gt 99 ]]; then
        echo "| $IP_PREFIX.$i -------- | DOWN - packet_loss : $packet_loss |"
      elif [[ $i -gt 9 ]]; then
        echo "| $IP_PREFIX.$i --------- | DOWN - packet_loss : $packet_loss |"
      else
        echo "| $IP_PREFIX.$i ---------- | DOWN - packet_loss : $packet_loss |"
      fi
    else
      if [[ $i -gt 99 ]]; then
        echo "| $IP_PREFIX.$i -------- | UP --- packet_loss : $packet_loss  |"
      elif [[ $i -gt 9 ]]; then
        echo "| $IP_PREFIX.$i --------- | UP --- packet_loss : $packet_loss  |"
      else
        echo "| $IP_PREFIX.$i ---------- | UP --- packet_loss : $packet_loss  |"
      fi
    fi
  done
}

lets_rock_down () {
  for (( i=$2 ; i>=$3 ; i-- )); do
    packet_loss=$(ping $1.$i -w 1 | grep "packet loss" | awk '{print $6}')
    if [[ $packet_loss = "100.0%" ]]; then
      if [[ $i -gt 99 ]]; then
        echo "| $IP_PREFIX.$i -------- | DOWN - packet_loss : $packet_loss |"
      elif [[ $i -gt 9 ]]; then
        echo "| $IP_PREFIX.$i --------- | DOWN - packet_loss : $packet_loss |"
      else
        echo "| $IP_PREFIX.$i ---------- | DOWN - packet_loss : $packet_loss |"
      fi
    else
      if [[ $i -gt 99 ]]; then
        echo "| $IP_PREFIX.$i -------- | UP --- packet_loss : $packet_loss |"
      elif [[ $i -gt 9 ]]; then
        echo "| $IP_PREFIX.$i --------- | UP --- packet_loss : $packet_loss |"
      else
        echo "| $IP_PREFIX.$i ---------- | UP --- packet_loss : $packet_loss |"
      fi
    fi
  done
}

pingtest (){
  IP_PREFIX=$1
  START_POINT=$2
  END_POINT=$3

  if [[ -z $IP_PREFIX ]] || [[ -z $START_POINT ]] || [[ -z $END_POINT ]]; then
    echo "./pingtest [prefix_ip] [start_point] [end_point]"
    echo "|"
    echo "|- example"
    echo "| ./pingtest 192.168.10 1 128"
    echo "|---"
    echo ""
  elif [[ $START_POINT -lt 1 ]] || [[ $END_POINT -lt 1 ]] || [[ $(is_valid_ip $IP_PREFIX) -gt 0 ]]; then
    echo "|- invalid prefix, input valid prefix"
    echo "|ex:"
    echo "|-- 10.10.10"
  else
    print_title
    [[ $START_POINT -gt $END_POINT ]] && \
      lets_rock_down $IP_PREFIX $START_POINT $END_POINT || \
      lets_rock_up $IP_PREFIX $START_POINT $END_POINT
  fi
}