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