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https://github.com/Security-Onion-Solutions/securityonion.git
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44 lines
1.5 KiB
Bash
44 lines
1.5 KiB
Bash
#!/bin/bash
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#
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# Copyright 2014,2015,2016,2017,2018,2019,2020 Security Onion Solutions, LLC
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This script returns the packets dropped by Zeek, but it isn't a percentage. $LOSS * 100 would be the percentage
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APP=zeekloss
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lf=/tmp/$APP-pidLockFile
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# create empty lock file if none exists
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cat /dev/null >> $lf
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read lastPID < $lf
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# if lastPID is not null and a process with that pid exists , exit
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[ ! -z "$lastPID" -a -d /proc/$lastPID ] && exit
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echo $$ > $lf
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ZEEKLOG=$(tac /host/nsm/zeek/logs/packetloss.log | head -2)
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declare RESULT=($ZEEKLOG)
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CURRENTDROP=${RESULT[3]}
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PASTDROP=${RESULT[9]}
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DROPPED=$((CURRENTDROP - PASTDROP))
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if [ $DROPPED == 0 ]; then
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LOSS=0
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echo "zeekdrop drop=0"
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else
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CURRENTPACKETS=${RESULT[5]}
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PASTPACKETS=${RESULT[11]}
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TOTAL=$((CURRENTPACKETS - PASTPACKETS))
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LOSS=$(echo $DROPPED $TOTAL / p | dc)
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echo "zeekdrop drop=$LOSS"
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fi
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