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#!/bin/sh
#
# Bindle Binaries Linux Firewall
# Copyright (c) 2019 David M. Syzdek <david@syzdek.net>.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of David M. Syzdek nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID M. SYZDEK BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
###############
# ENVIRONMENT #
###############
PATH=/usr/bin:/bin:/usr/sbin:/sbin
export PATH
# sets script/package information
PROG_NAME="$(basename "${0}")"
PACKAGE_NAME="$(echo '@PACKAGE_NAME@' |sed -e 's/[@].*[@]/ /g')"
PACKAGE_VERSION="$(echo '@PACKAGE_VERSION@' |sed -e 's/[@].*[@]/ /g')"
PACKAGE_BUGREPORT="$(echo '@PACKAGE_BUGREPORT@' |sed -e 's/[@].*[@]/ /g')"
#############
# FUNCTIONS #
#############
usage()
{
printf "Usage: ${PROG_NAME} [OPTIONS]\n"
printf "OPTIONS:\n"
printf " -h, --help print this help and exit\n"
printf " -k, --kerneltime print kernel timestamp\n"
printf " -n, --notime do not print timestamp\n"
printf " -t, --timestamp print human readable timestamp\n"
printf " -v, --version print version and exit\n"
printf " -w, --follow wait for new messages\n"
printf "\n"
printf "Please send bug reports to ${PACKAGE_BUGREPORT}.\n"
}
version()
{
printf "${PROG_NAME} (${PACKAGE_NAME}) ${PACKAGE_VERSION}\n"
printf "\n"
printf "Please send bug reports to ${PACKAGE_BUGREPORT}.\n"
}
############
### MAIN ###
############
DMESG_TIME="-T"
DMESG_FOLLOW=""
DMESG_PATTERN=" IN=[-.:/a-zA-Z0-9]{0,} OUT=[-.:/a-zA-Z0-9]{0,} MAC=[:a-fA-F0-9]{0,} SRC=[:.0-9a-fA-F]{0,} DST=[:.0-9a-fA-F]{0,} "
while true; do
case "$@" in
-h|--help) usage; exit 0;;
-k|--kerneltime) DMESG_TIME=""; shift ;;
-n|--notime) DMESG_TIME="-t"; shift ;;
-t|--timestamp) DMESG_TIME="-T"; shift ;;
-v|--version) version; exit 0;;
-w|--follow) DMESG_FOLLOW="-w"; shift ;;
"") break ;;
--) shift; break ;;
*) usage; exit 1 ;;
esac
done
/bin/dmesg ${DMESG_TIME} ${DMESG_FOLLOW} \
|egrep "${DMESG_PATTERN}" \
|sed \
-e 's/[^[:graph:]]/ /g' \
-e 's/ip6tables drop: /,in,/g' \
-e 's/ip6tables input: /,in,/g' \
-e 's/ip6tables forward: /,fwd,/g' \
-e 's/ip6tables output: /,out,/g' \
-e 's/ip6tables blackhole: /,blkhol,/g' \
-e 's/ip6tables \([-_a-z0-9:;,]\{1,\}\): /,\1,/gi' \
-e 's/[[:space:][:cntrl:]]\{1,\}/ /g' \
-e 's/ [[:upper:]]\{1,\} / /g' \
-e 's/ MAC=[:[:xdigit:]]\{1,\} / /g' \
-e 's/ ID=[[:digit:]]\{1,\} / /g' \
-e 's/ TTL=[[:digit:]]\{1,\} / /g' \
-e 's/ LEN=[[:digit:]]\{1,\} / /g' \
-e 's/ URGP=[[:digit:]]\{1,\} / /g' \
-e 's/ WINDOW=[[:digit:]]\{1,\} / /g' \
-e 's/ PREC=0x[[:xdigit:]]\{1,\} / /g' \
-e 's/ RES=0x[[:xdigit:]]\{1,\} / /g' \
-e 's/ TOS=0x[[:xdigit:]]\{1,\} / /g' \
-e 's/ ACK / /g' \
-e 's/ CWR / /g' \
-e 's/ DF / /g' \
-e 's/ ECE / /g' \
-e 's/ RST / /g' \
-e 's/ SYN / /g' \
-e 's/ PSH / /g' \
-e 's/ \([A-Z]\{1,\}=\)/,\1/g' \
|column -t -s ','
# End of scripts
|
