From 3d388be5e62b1c833c85e9bcab4acb170517a8dd Mon Sep 17 00:00:00 2001
From: Benjamin Renard <brenard@easter-eggs.com>
Date: Thu, 19 May 2022 11:36:51 +0200
Subject: [PATCH] Add check_sip_zombie_channels

---
 check_sip_zombie_channels | 128 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100755 check_sip_zombie_channels

diff --git a/check_sip_zombie_channels b/check_sip_zombie_channels
new file mode 100755
index 0000000..79d6032
--- /dev/null
+++ b/check_sip_zombie_channels
@@ -0,0 +1,128 @@
+#!/bin/bash
+
+DEBUG=0
+WARNING_HOURS=3
+CRITICAL_HOURS=6
+
+function usage() {
+	[ -n "$1" ] && echo "$1" && echo
+	echo "Usage : $0 [-cX] [-wX] [-d]"
+	echo "	-h		Show this help message"
+	echo "	-d		Enable debug mode"
+	echo "	-c[X]		Specify critical call duration threshold"
+	echo "	-w[X]		Specify warning call duration threshold"
+}
+
+function debug() {
+	[ $DEBUG -eq 1 ] && echo -e "$( date "+%Y/%m/%d %H:%M:%S" ) - $1"
+}
+
+CRITICAL=10
+WARNING=8
+DEBUG=0
+
+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 $a in
+			c)
+				CRITICAL_HOURS=$v
+			;;
+			w)
+				WARNING_HOURS=$v
+			;;
+			d)
+				DEBUG=1
+			;;
+			h)
+				usage
+				exit 0
+			;;
+		esac
+	else
+		usage "Invalid argument '$arg'"
+	fi
+done
+
+let WARNING_SECONDS=WARNING_HOURS*3600
+let CRITICAL_SECONDS=CRITICAL_HOURS*3600
+
+
+STATE=OK
+EXITCODE=
+
+CRITICAL=0
+CRITICAL_CHANNELS=""
+WARNING=0
+WARNING_CHANNELS=""
+OK=0
+
+debug "Retreive current channels info using rasterisk..."
+
+## Output example for asterisk cli commande 'core show channels concise' :
+##  format :
+##     1      2      3     4    5    6     7       8      9  10  11     12         13       14
+##  chanid!context!exten!prio!state!app!appdata!callerid![?]![?]![?]!duration!bridgedtochan![?]
+## SIP/trunk-00010bc5!incoming!02XXXXXX19!1!Down!AppDial!(Outgoing Line)!02XXXXXX19!!!3!0!(None)!1447335911.168247
+## SIP/trunk-00010bc0!macro-callqueue!s!4!Up!Queue!natlrecouvrement,,,,120!09XXXXXX68!!!3!19!(None)!1447335892.168238
+CURRENT_CHANNELS=$( /usr/bin/sudo -u root /usr/sbin/rasterisk -rnx 'core show channels concise' | grep -v '^CBAnn/' | grep -Ev "^Setting\s+max\s+files")
+
+debug "Current channels:\n$CURRENT_CHANNELS"
+
+IFS="
+"
+for line in $CURRENT_CHANNELS
+do
+	if [ $(echo $line | grep -c "^Message/ast_msg_queue") -eq 1 ]
+	then
+		debug "Info Message/ast_msg_queue channel (line: $line)"
+		continue
+	fi
+
+	channel=$( echo -e "$line"|cut -d'!' -f1 )
+	duration=$( echo -e "$line"|cut -d'!' -f12 )
+	debug "Channel '$channel' duration: '$duration'"
+
+	if [ $duration -gt $CRITICAL_SECONDS ]
+	then
+		debug "Channel '$channel' duration is CRITICAL"
+		let CRITICAL=CRITICAL+1
+		CRITICAL_CHANNELS="$CRITICAL_CHANNELS $channel"
+	elif [ $duration -gt $WARNING_SECONDS ]
+	then
+		debug "Channel '$channel' duration is WARNING"
+		let WARNING=WARNING+1
+		WARNING_CHANNELS="$WARNING_CHANNELS $channel"
+	else
+		debug "Channel '$channel' duration is OK"
+		let OK=OK+1
+	fi
+done
+
+debug "Critical channels count: $CRITICAL ($CRITICAL_CHANNELS)"
+debug "Warning channels count: $WARNING ($WARNING_CHANNELS)"
+debug "OK channels count: $OK"
+
+if [ $CRITICAL -gt 0 ]
+then
+	STATE=CRITICAL
+	EXITCODE=2
+	MSG="$CRITICAL channels open since more than $CRITICAL_HOURS hours"
+elif [ $WARNING -gt 0 ]
+then
+	STATE=WARNING
+	EXITCODE=1
+	MSG="$WARNING channels open since more than $WARNING_HOURS hours"
+else
+	STATE=OK
+	EXITCODE=0
+	MSG="$OK channels open since less than $WARNING_HOURS hours"
+fi
+
+echo "$STATE - $MSG|ok=$OK,warning=$WARNING,critical=$CRITICAL"
+[ -n "$CRITICAL_CHANNELS" ] && echo "Critical channels :$CRITICAL_CHANNELS" 
+[ -n "$WARNING_CHANNELS" ] && echo "Warning channels :$WARNING_CHANNELS" 
+exit $EXITCODE