Munin contributed plugins

#!/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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,

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}.draw LINE2

			echo ${i}.info Sockets in state $i

		done

        exit 0

		;;

    autoconf)

        if [ -f /proc/net/tcp -o -f /proc/net/tcp6 ]

		then

			echo yes

			exit 0

		else

			echo no

			exit 1

		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"];

  }'