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61 lines
2 KiB
Text
61 lines
2 KiB
Text
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#!/bin/sh -eu
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# analyze-packet-spam – show minetest client packet count per second
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# Copyright © 2021 Nils Dagsson Moskopp (erlehmann)
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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 Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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# Dieses Programm hat das Ziel, die Medienkompetenz der Leser zu
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# steigern. Gelegentlich packe ich sogar einen handfesten Buffer
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# Overflow oder eine Format String Vulnerability zwischen die anderen
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# Codezeilen und schreibe das auch nicht dran.
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# This script takes a minetest log with at least INFO log level and
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# outputs the MINETEST network protocol packet count per second.
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# To collect such a log file of minetest running for 10 minutes, run:
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# timeout 600 minetest --info >log.txt 2>&1 >/dev/null
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# To get packet counts from that file, run:
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# ./analyze-packet-spam <log.txt
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TEMPFILE=$(mktemp /tmp/minetest.analyze-packet-spam.XXXXXXXX)
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grep -F 'INFO[Main]: cmd' \
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|while read DATE TIME _ _ PACKET_ID PACKET_NAME _ PACKET_COUNT; do
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TIMESTAMP=$(date +%s --date "${DATE} ${TIME%:}")
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PACKET_NAME=${PACKET_NAME#(}
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PACKET_NAME=${PACKET_NAME%)}
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VARIABLE=PACKET_COUNT_"${PACKET_NAME}"
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eval "$( echo $VARIABLE=\$\(\( \${$VARIABLE:-0} + ${PACKET_COUNT} \)\) )"
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printf '%s ' \
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"${TIMESTAMP}" \
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"${VARIABLE}"
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eval echo \$${VARIABLE}
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done >"${TEMPFILE}"
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TIMESTAMP_START=$( <"${TEMPFILE}" head -n1 |cut -d' ' -f1 )
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TIMESTAMP_END=$( <"${TEMPFILE}" tail -n1 |cut -d' ' -f1 )
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DURATION=$(( 30 + ${TIMESTAMP_END} - ${TIMESTAMP_START} ))
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PACKET_NAME_SEEN=''
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<"${TEMPFILE}" tac \
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|while read _ PACKET_NAME PACKET_COUNT; do
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case "${PACKET_NAME_SEEN}" in
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*"${PACKET_NAME}"*)
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;;
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*)
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PACKET_COUNT_PER_SECOND=$(
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printf '1k %s %s /p' "${PACKET_COUNT}" "${DURATION}" \
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|dc
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)
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printf '%s\t%s\n' "${PACKET_COUNT_PER_SECOND}" "${PACKET_NAME}"
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PACKET_NAME_SEEN="${PACKET_NAME_SEEN} ${PACKET_NAME}"
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;;
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esac
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done
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unlink "${TEMPFILE}"
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