#!/bin/bash
################################################################################
#
# File:         pingnet
# RCS:          $Header: pingnet,v 1.3 98/03/04 00:42:49 defaria Exp $
# Description:  A script to ping all machines and report status. This script
#               uses /etc/hosts and selects only machines in the IP range of
#               15.0.96.x to 15.0.99.x.
# Author:       Andrew DeFaria <Andrew@DeFaria.com>
# Created:      Sat Oct 26 10:04:28 PDT 1996
# Modified:     Sat Oct 26 12:05:26 PDT 1996 Andrew DeFaria <defaria@cup.hp.com>
# Parameters:   count (default 2): number of times to ping a machine before
#               considering it not responding.
# Language:     Korn Shell
#
# (c) Copyright 2001, Andrew@DeFaria.com, all rights reserved
#
################################################################################
me=$(basename $0)

function usage {
  echo -e "$me: Usage: $me { count }"
  echo -e "\twhere count = number of times to ping a machine before
considering"
  echo -e "\tthe machine to be not responding (default count = 2)."
  exit 1
} # usage

os=

function get_os {
  #for now skip get_os
  os=Unknown
  return
  machine=$1
  # Attempt to determine the OS. First attempt to remsh to the machine and
  # do a uname(1). This assumes Unix. We are unable to remsh then we'll
  # assume that it's a PC (it could also be a line printer or any other of
  # a number of network pingable devices!)
  os=$(rsh $machine -n uname 2>&1)

  # We're gonna make some guesses here...
  if [[ "$os" = "HP-UX" ||
        "$os" = "Linux" ]]; then
    : Do nothing!
  elif [[ "$os" = *Lost\ connection ]]; then
    os="Linux? (Lost connection)"
  elif [[ "$os" = *Permission\ denied. ]]; then
    os="Linux? (Permission denied)"
  elif [[ "$os" = *Login\ incorrect ]]; then
    os="HP-UX? (Login incorrect)"
  elif [[ "$os" = *Connection\ refused ]]; then
    os="NT? (Connection refused)"
  else
    os="Unknown"
  fi
} # get_os

declare -i count=2

if [ $# -eq 1 ]; then
  count=$1
elif [ $# -gt 1 ]; then
  usage
fi

esc=$(echo "\033")

if [ "$TERM" = "dtterm" -o -z DTTERM ]; then
  export normal="$esc[39m"
  export red="$esc[31m"
  export green="$esc[32m"
elif [ "$TERM" = "hp" -o "$TERM" = "hpterm" ]; then
  export normal="$esc&d@$esc&v0S"
  export red="$esc&v1S"
  export green="$esc&v2S"
fi

# Print heading
echo -e "       Machine\t\t      IP\tState\t  OS"
echo -e "-----------------------\t-------------\t-----\t-------"

subnet=${subnet:-192.168}
declare -i starting_subnet_octect=${starting_subnet_octect:-0}
declare -i ending_subnet_octect=${ending_subnet_octect:-0}
declare -i subnet_octect=starting_subnet_octect
declare -i starting_octect=${starting_octect:-0}
declare -i ending_octect=${ending_octect:-255}
declare -i octect=$starting_octect

while [ $subnet_octect -le $ending_subnet_octect ]; do
  while [ $octect -le $ending_octect ]; do
    ip=$subnet.$subnet_octect.$octect
    machine=$ip
    nslookup $ip 2>&1 | grep Non-exist > /dev/null 2>&1
    if [ $? -ne 0 ]; then
      machine=$(nslookup $ip | grep Name: | awk '{print $2}' | cut -f1 -d.)
    fi
    echo -e "$machine\t\c"
    if [ ${#machine} -lt 8 ]; then
      echo -e "\t\t\c"
    elif [ ${#machine} -lt 16 ]; then
      echo -e "\t\c"
    fi
    echo -e "$ip\t\c"
    ping_result=$(ping $ip -n $count | tail -1 | grep "100% loss")
    if [ -z "$ping_result" ]; then
      echo -e "${green}UP${normal}\t\c"
      get_os $machine
      echo -e "$os"
    else
      echo -e "${red}DOWN${normal}\tUnknown"
    fi
    let octect=octect+1
  done
  let subnet_octect=subnet_octect+1
  let octect=starting_octect
done