#!/usr/bin/sh
: <<EOF
=head1 NAME
tcp - Plugin to monitor IPV4/6 TCP socket status on a Linux host.
=head1 AUTHOR
Copyright 2009 Tim Small <tim@seoss.co.uk>
=head1 LICENSE
GPLv2
=begin comment
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 dated June, 1991.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
=end comment
=head1 MAGIC MARKERS
#%# family=manual
#%# capabilities=autoconf
=cut
EOF
case $1 in
config)
cat <<EOF
graph_title TCP
graph_vlabel TCP Sockets
graph_category network
graph_args -l 0
graph_info TCP socket states for the local machine
EOF
for i in established syn_sent syn_recv fin_wait1 \
fin_wait2 time_wait close close_wait last_ack \
listen closing
do
echo "${i}.label $i"
echo "${i}.info Sockets in state $i"
done
exit 0
;;
autoconf)
if [ -f /proc/net/tcp ] || [ -f /proc/net/tcp6 ]
then
echo yes
exit 0
else
echo no
exit 0
fi
esac
# See #include <netinet/tcp.h>
cat /proc/net/tcp* | awk '
match ($4, /0[0-9A-B]/) {
STATE[$4]++;
}
END {
printf "established.value %d\n", STATE["01"];
printf "syn_sent.value %d\n", STATE["02"];
printf "syn_recv.value %d\n", STATE["03"];
printf "fin_wait1.value %d\n", STATE["04"];
printf "fin_wait2.value %d\n", STATE["05"];
printf "time_wait.value %d\n", STATE["06"];
printf "close.value %d\n", STATE["07"];
printf "close_wait.value %d\n", STATE["08"];
printf "last_ack.value %d\n", STATE["09"];
printf "listen.value %d\n", STATE["0A"];
printf "closing.value %d\n", STATE["0B"];
}'
Mini Shell