#!/bin/bash
#
# NAME
# ----
# - xymon_asterisk_dahdi.sh
#
# DESCRIPTION
# -----------
# - Script to monitor Digium Asterisk Hardware Device Interface (DAHDI)
#   channels on a DIGIUM TDM410P 4-port FXS/FXO analog card in an
#   Asterisk system. It will probably work with other analog cards in
#   an asterisk system which use the DAHDI drivers.
#
# - The most current version of this script may be
#   found at http://www.revpol.com/xymon_asterisk_dahdi_script
#
# - Instructions to integrate the output of this script to be monitored
#   and graphed by a Xymon server may also be found at the above URL
#
# - If you find this script useful, I'd love to know. Send me an email, 
#   or leave a comment on that script page!
#
# William A. Arlofski
# Reverse Polarity, LLC
# 860-824-2433 Office
# http://www.revpol.com/
#
# HISTORY
# -------
# - 20130531 - HBD - Initial version release. This script currently makes no
#              attempt to monitor more than one card in a system. This is due
#              to the fact that we only have a 4-channel analog Digium card
#              currently in production to test with.
#
###############################################################################
#
# Copyright (C) 2013 William A. Arlofski - waa-at-revpol-dot-com
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
# or visit http://www.gnu.org/licenses/gpl.txt
#
###############################################################################
#
# Set some variables
# ------------------
#
# Name of Xymon test
# ------------------
COLUMN="DAHDI"

# Add an administrative message to the top of the report page
# Not necessary, but can be a quick way to know what server
# is monitoring the DAHDI channels, and perhaps provide some
# instructional information
# -----------------------------------------------------------
ADMINMSG="This report generated by ${MACHINEDOTS}<br>${MACHINEDOTS} resides in the main server room<br>Contact John Doe x1234 with questions<br>"

# Optional Footer message
# -----------------------
FOOTER="<center>Asterisk DAHDI channel test results reported with <i>xymon_asterisk_dahdi_script.sh</i><br>Created by: <a href="http://www.revpol.com/" target="_blank">Reverse Polarity, LLC</a></center>"

# Color to set the test to when a channel is down (red or yellow)
# ---------------------------------------------------------------
TESTCOL="red"


###############################################################################
# --------------------------------------------------
# Nothing should need to be modified below this line
# --------------------------------------------------
###############################################################################
#
# ----------------------------
# Set required Xymon variables
# ----------------------------
COLOR="green"
MSG=""

data=`cat /proc/dahdi/1`
chandata=`echo "${data}" | sed -e 's/\t//' -e 's/ \+//' | grep ^[1-4]`
card=`echo "${data}" | grep ^Span`

# Wrapping iin the script here is ugly to provide
# reasonable output on the test's status page
# -----------------------------------------------
IFS=$'\n'
for channel in ${chandata}; do
	curcolor="green"
	chnum=`echo ${channel} | cut -d' ' -f1`
	chinfo=`echo ${channel} | cut -d' ' -f1-3`
	status=`echo ${channel} | grep -i "red" 2>&1`
	if [ ! -z ${status} ]; then
		curcolor=${TESTCOL}
		COLOR=${TESTCOL}
	fi
	MSG="${MSG}
  &${curcolor} Channel:${chinfo}
"
done
unset IFS

# Prepend the administrative message to the report
# add the card information, the channel statuses
# and finally the footer
# ------------------------------------------------
MSG="${ADMINMSG}
<hr>
&${COLOR} ${card}
${MSG}
<hr>
${FOOTER}"

# Send final report to Xymon Server
# ---------------------------------
$BB $BBDISP "status $MACHINE.$COLUMN $COLOR `date`
${MSG}
"