From e5308456b40258ab382fc0edccf059484fc6639a Mon Sep 17 00:00:00 2001
From: Marki <marki@marki-online.net>
Date: Thu, 11 Nov 2010 14:59:12 +0100
Subject: [PATCH] Initial version

---
 plugins/other/tcp-states | 54 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100755 plugins/other/tcp-states

diff --git a/plugins/other/tcp-states b/plugins/other/tcp-states
new file mode 100755
index 00000000..eb093263
--- /dev/null
+++ b/plugins/other/tcp-states
@@ -0,0 +1,54 @@
+#!/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] }'