tcp6? connection monitor for munin

gistfile1.sh

#!/bin/sh

case $1 in
config)
  cat <<EOF
graph_title Connections through firewall
graph_vlabel Connections
graph_category network
graph_args -l 0
established.label ESTABLISHED
established.type GAUGE
established.draw AREA
syn_sent.label SYN_SENT
syn_sent.type GAUGE
syn_sent.draw STACK
syn_recv.label SYN_RECV
syn_recv.type GAUGE
syn_recv.draw STACK
fin_wait1.label FIN_WAIT1
fin_wait1.type GAUGE
fin_wait1.draw STACK
fin_wait2.label FIN_WAIT2
fin_wait2.type GAUGE
fin_wait2.draw STACK
time_wait.label TIME_WAIT
time_wait.type GAUGE
time_wait.draw STACK
close.label CLOSE
close.type GAUGE
close.draw STACK
close_wait.label CLOSE_WAIT
close_wait.type GAUGE
close_wait.draw STACK
last_ack.label LAST_ACK
last_ack.type GAUGE
last_ack.draw STACK
listen.label LISTEN
listen.type GAUGE
listen.draw STACK
closing.label CLOSING
closing.type GAUGE
closing.draw STACK
EOF
  exit 0
;;
autoconf)
  echo yes
  exit 0
esac


PROCNET_TCP=/proc/net/tcp
PROCNET_TCP6=/proc/net/tcp6
cat $PROCNET_TCP $PROCNET_TCP6 | awk -v st=4 '
  function get(dic, key, default_val) { return dic[key] ? dic[key] : default_val; }
  function set(dic, key, val) { return dic[key] = val; }
  function inc(dic, key) { return dic[key] ? ++dic[key] : (dic[key]=1); }
  $1 ~ /^[0-9]+:$/ {
    inc(STATE, $st);
  }
  END {
    print("established.value " get(STATE, "01", 0));
    print("syn_sent.value "    get(STATE, "02", 0));
    print("syn_recv.value "    get(STATE, "03", 0));
    print("fin_wait1.value "   get(STATE, "04", 0));
    print("fin_wait2.value "   get(STATE, "05", 0));
    print("time_wait.value "   get(STATE, "06", 0));
    print("close.value "       get(STATE, "07", 0));
    print("close_wait.value "  get(STATE, "08", 0));
    print("last_ack.value "    get(STATE, "09", 0));
    print("listen.value "      get(STATE, "0A", 0));
    print("closing.value "     get(STATE, "0B", 0));
  }
'

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