Munin contributed plugins

#!/bin/sh

#

# Plugin to monitor TCP states.

#

# Parameters:

#

# 	config   (required)

# 	autoconf (optional - only used by munin-config)

#

# (C) Marki - count number of connections in each state

#           - no LISTEN as we are running netstat without the "-a" option

#

#

# Magic markers (optional - used by munin-config and some installation

# scripts):

#%# family=auto

#%# capabilities=autoconf

if [ "$1" = "autoconf" ]; then

	if ( netstat -nt 2>/dev/null >/dev/null ); then

		echo yes

		exit 0

	else

		if [ $? -eq 127 ]

		then

			echo "no (netstat program not found)"

			exit 1

		else

			echo no

			exit 1

		fi

	fi

fi

if [ "$1" = "config" ]; then

	echo 'graph_title TCP Connection States'

	echo 'graph_args -l 0 --base 1000'

	echo 'graph_vlabel connections'

	echo 'graph_category network'

	echo 'graph_period second'

	echo 'graph_info This graph shows the TCP connections states of all the network interfaces combined.'

	for i in ESTABLISHED SYN_SENT SYN_RECV FIN_WAIT1 FIN_WAIT2 TIME_WAIT CLOSE CLOSE_WAIT LAST_ACK CLOSING; do

	  echo "$i.label $i"

	  echo "$i.type GAUGE"

	  echo "$i.max 32999"

	  echo "$i.min 0"

	done

	exit 0

fi

netstat -nt | awk '/^tcp/ { states[$6]++ } END { for (idx in states) print idx ".value " states[idx] }'