#!/bin/sh
#
# Copyright (c) 2016 Babak Farrokhi.  All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# 17-Feb-2015 @farrokhi
# This script extracts network memory usage counters from "netstat -m" 
# on FreeBSD and feeds to munin
#
# Magic markers:
#%# family=auto
#%# capabilities=autoconf suggest


SCRIPT_NAME=$(basename $0)
STAT_TYPE=`echo $SCRIPT_NAME | sed -n s/netmem_//p`

if [ $# -lt 1 ]; then

   if   [ "${STAT_TYPE}" == "mbufs" ]; then
      netstat -m | grep "mbufs in use" | sed -E -n 's/([0-9]+)\/([0-9]+)\/([0-9]+) .+/mbufs_current.value \1,mbufs_cache.value \2,mbufs_total.value \3/p' | tr ',' '\n'
   elif [ "${STAT_TYPE}" == "clusters" ]; then
      netstat -m | grep "mbuf clusters in use" | sed -E -n 's/([0-9]+)\/([0-9]+)\/([0-9]+)\/([0-9]+) .+/clusters_current.value \1,clusters_cache.value \2,clusters_total.value \3,clusters_max.value \4/p' | tr ',' '\n'
   elif [ "${STAT_TYPE}" == "sendfile" ]; then
      netstat -m | grep sendfile | sed -E -n 's/(^[0-9]+).+/sendfile.value \1/p'
   fi

elif [ "$1" == "suggest" ]; then   
   echo "mbufs"
   echo "clusters"
   echo "sendfile"

elif [ "$1" == "autoconf" ]; then
   [ -x "/usr/bin/netstat" ] && echo yes || echo no
   exit 0

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

   if   [ "${STAT_TYPE}" == "mbufs" ]; then
      echo "graph_title mbufs usage"
      echo "graph_args --lower-limit 0 --base 1000"
      echo "graph_vlabel mbufs"
      echo "graph_category network"
      echo "mbufs_current.label current"
      echo "mbufs_current.draw AREA"
      echo "mbufs_cache.label cache"
      echo "mbufs_cache.draw STACK"
      echo "mbufs_total.label total"
      echo "mbufs_total.draw LINE2"
   elif [ "${STAT_TYPE}" == "clusters" ]; then
      echo "graph_title mbuf clusters usage"
      echo "graph_args --lower-limit 0 --base 1000"
      echo "graph_vlabel clusters"
      echo "graph_category network"
      echo "clusters_current.label current"
      echo "clusters_current.draw AREA"
      echo "clusters_cache.label cache"
      echo "clusters_cache.draw STACK"
      echo "clusters_total.label total"
      echo "clusters_total.draw LINE2"
      #echo "clusters_max.label max"
      #echo "clusters_max.draw LINE1"
   elif [ "${STAT_TYPE}" == "sendfile" ]; then
      echo "graph_title sendfile() calls"
      echo "graph_args --lower-limit 0 --base 1000"
      echo "graph_vlabel calls"
      echo "graph_period minute"
      echo "graph_category network"
      echo "sendfile.label calls"
      echo "sendfile.draw LINE1"
      echo "sendfile.type DERIVE"
   fi   

fi