#!/bin/bash
# Verifie la latence d'une connexion SIP Asterisk

DEBUG=0
PEER=""
CRITICAL_LATENCY=100
WARNING_LATENCY=40


function usage() {
	[ -n "$1" ] && echo "$1" && echo
	echo "Usage : $0 [-cX] [-wX] [-d] [peer]"
	echo "	-h		Show this help message"
	echo "	-d		Enable debug mode"
	echo "	-c[X]		Specify critical latency of peer (in ms)"
	echo "	-w[X]		Specify warning latency of peer (in ms)"
	echo "	[peer]		Specify the peer name"
}

function debug() {
	[ $DEBUG -eq 1 ] && echo -e "$( date "+%Y/%m/%d %H:%M:%S" ) - $1"
}

# Parse arguments
for arg in $@
do
	if [ $( echo $arg|egrep -c '^-[cwdh][0-9]*$' ) -gt 0 ]
	then
		a=$( echo $arg|sed 's/^-\([cwdh]\).*$/\1/' )
		v=$( echo $arg|sed 's/^-[cwdh]//' )
		case $a in
			c)
				CRITICAL_LATENCY=$v
			;;
			w)
				WARNING_LATENCY=$v
			;;
			d)
				DEBUG=1
			;;
			h)
				usage
				exit 0;
			;;
		esac
	elif [ -z "$PEER" ]
	then
		PEER="$arg"
	else
		echo "Only one peer can be specified (or invalid '$arg' parameter)"
	fi
done

[ -z "$PEER" ] && usage "You must specify peer name" && exit 1
debug "Specified peer name : $PEER"

debug "Warning/Critical latency : $WARNING_LATENCY / $CRITICAL_LATENCY"
[ $WARNING_LATENCY -gt $CRITICAL_LATENCY ] && usage "Warning latency must be lower than critical one" && exit 1

latency=`/usr/bin/sudo -u root /usr/sbin/rasterisk -rnx "sip show peer $PEER"|grep Status|sed 's/.*(\([0-9]*\) ms.*/\1/g'`

if [ ! -n "$latency" ]
then
    echo "UNKNOWN - SIP peer $PEER unknown"
    exit 3
fi

debug "Latency of peer $PEER : $latency ms"

details="Latency : $latency ms"

if [ $latency -gt $CRITICAL_LATENCY ]
then
    nstatus="CRITICAL"
    exitcode=2
elif [ $latency -gt $WARNING_LATENCY ]
then
    nstatus="WARNING"
    exitcode=1
else
    nstatus="OK"
    exitcode=0
fi

echo "${nstatus} - SIP Latency is ${nstatus}: $details | latency=${latency}ms"
exit $exitcode