#!/bin/sh
# -*- sh -*-
#
# Plugin to monitor voip statistics.
#
# Parameters:
#
# 	config   (required)
# 	autoconf (optional - only used by munin-config)
#
# Bugs:
#       At least one SuSE netstat appears to report
#         "passive connections rejected because of time stamp"
#        We have never seen that, patch requested.
#
# Magic markers (optional - used by munin-config and some installation
# scripts):
#%# family=auto
#%# capabilities=autoconf



if [ "$1" = "autoconf" ]; then
	echo yes
	exit 0
fi

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

	echo 'graph_title PRI channels in use'

	# Most T1s have 23 channels, with one control channel. If you have more than
	# one T1, increase the limit here appropriately
	echo 'graph_args --upper-limit 22 -l 0'
	echo 'graph_scale no'
	echo 'graph_vlabel active connections'
	echo 'graph_category voip'
	echo 'graph_period second'
	echo 'graph_info This graph shows the number of PRI lines in use.'
	echo 'calls.label calls'
	echo 'calls.min 0'
	echo 'calls.info The number of calls per second.'
	exit 0
fi

# it would be wise to put the following in a separate shell script that runs as root in
# cron, and dumps its output to a separate file for this plugin to read later on. Letting
# Munin plugins run as root is a security hole.

zap=$(asterisk -rx 'zap show channels' |grep -v "[[:digit:]]*[[:space:]] local" |grep -vc "Chan Extension")

echo "calls.value $zap"