#! /bin/bash
#: Title: monitor.sh
#: Date: 28.01.2015
#: Author: Falko Benthin
#: Version: 1.0
#: Desciption: Sends SNMP requests to individual APs/routers and logs the output with timestamps for evaluation later
#: Options: none
# sends snmp requests to individual hosts
function checkMachines() {
  # ipNetToMediaPhysAddress
  snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST .1.3.6.1.2.1.4.22.1.3
  # memory_used
  snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST .1.3.6.1.2.1.25.2.3.1.6.101
  # CPU-load-1 snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST 1.3.6.1.4.1.2021.10.1.5.1
  # CPU-load-5 snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST 1.3.6.1.4.1.2021.10.1.5.2
  # CPU-load-15
  snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST .1.3.6.1.4.1.2021.10.1.5.3
  # wlan_clients
  snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST .1.3.6.1.4.1.2021.255.3.54.1.3.32.1.4
  # ifInOctets
  snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST .1.3.6.1.2.1.2.2.1.10
  # ifInUcastPkts
  snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST .1.3.6.1.2.1.2.2.1.11
  # ifInDiscards
  snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST .1.3.6.1.2.1.2.2.1.13
  # ifInErrors
  snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST .1.3.6.1.2.1.2.2.1.14
  # ifOutOctets
  snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST .1.3.6.1.2.1.2.2.1.16
  # ifOutUcastPkts
  snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST .1.3.6.1.2.1.2.2.1.17
  # ifOutDiscards
  snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST .1.3.6.1.2.1.2.2.1.19
  # ifOutErrors
  snmpwalk -v1 -Oqs -c $ROCOMMUNITY $HOST .1.3.6.1.2.1.2.2.1.20
  }
# Directory for logfiles
LOGDIR="/home/falko/monitorlog"
# community string
ROCOMMUNITY="community"
# date
YEAR=$( date +%Y )
MONTH=$( date +%m )
DAY=$( date +%d )
while read HOST DESC
do
  DATEDIR=$LOGDIR/$YEAR/$MONTH/$DAY
  # Directory for date
  if [ ! -d $DATEDIR ]; then
    mkdir -p $DATEDIR
  fi
  # check if host is reachable
  if ! ping -c3 $HOST > /dev/null; then
    if [ ! -e $LOGDIR/$HOST.lastmail.log ] || [ ! $( date -d @$( cat $LOGDIR/$HOST.lastmail.log ) +%d ) = $DAY ]
    then
      printf "The AP/Router %s, %s is not reachable. Please check." $HOST "$DESC" | mail -s "Check AP/Router" recp1@samplemail.org recp2@samplemail.org recp3@samplemail.org
      echo $( date +%s ) > $LOGDIR/$HOST.lastmail.log
    fi
  else
    # SMTP-Checks and Logging
    checkMachines | while read OUTPUT
    do
      printf "%s %s\n" $( date +%T ) "$OUTPUT" >> $DATEDIR/$HOST.log
    done
  fi
done < machines.txt
exit 0