#!/bin/bash
# statAircard320U.sh
# written by bob fulton BRAEWORKS July 2013
# script to check status on a Telstra Bigpond Sierra Wireless Aircard 320U 4G USB dongle
#
# provided AS IS, no warranties, etc. are provided

VERSION=V1.11
PROG="$(basename $0)"
BASEDIR="/custom/broadband"

. ${BASEDIR}/commonAircard320U.inc

echo "Start $PROG $VERSION on $(date '+%Y/%m/%d %H:%M:%S')"

if [ ! -z "$USER" -a "$USER" != "root" ]; then
        echo "Must be root (not $USER) user to execute $PROG."
        exit 1
fi

# echo "check its there"
TST=$(usb-devices 2> /dev/null | grep "Product=AirCard 320U")
# echo $TST # test
if [ -z "$TST" ]; then
	echo "Sierra Wireless AirCard 320U not found"
	exit 1
fi

# echo "check $NET_ETH is up"
TST=$(ifconfig | awk ' { print $1 } ' | grep $NET_ETH)
if [ -z "$TST" ]; then
    # echo "Bring up $NET_ETH"	# test
    ifconfig $NET_ETH up
    TST=$(ifconfig | awk ' { print $1 } ' | grep $NET_ETH)
    if [ -z "$TST" ]; then
		echo "Failed to bring up $NET_ETH"
		exit 1
    fi
fi

USBTERM_RESPONSE=""	# sometimes the doggle provides erronenous responses (typically trying to use part of a previous command)
function usbTermCmd() {	# $1=outCmd, [$2=-v (verbose)]
	USBTERM_RESPONSE=""
	echo -e "${1}\r" > "$MODEM_PORT"
	while read -t $READ_TOUT R
	do
		if [ "${#R}" -lt 1 ]; then continue; fi	# forget blank lines
		USBTERM_RESPONSE="$R"	# save the last line (usually OK or ERROR)
		if [ ! -z "$2" -a "$2" == "-v" ]; then echo "$R"; fi
	done < "$MODEM_PORT"
	return 0
} # usbTermCmd()

function is_connected() {
	local R=$(usbTermCmd "AT!SCACT?$MPPID" "-v" | grep "SCACT:")
	# echo "$R response"	# test
	C=$(echo "$R" | awk -F ',' '{ print $2 }')
	# echo "$C"	# test
	if [ "$C" == "0" ]; then
		echo "Not connected"
	else
		echo "Connected"
		return 1
	fi
	return 0
} # is_connected()

# get status
is_connected "$1"
if [ "$?" -gt 0 ]; then	# connected
	USB0_IP=$(ip addr show dev $NET_ETH | grep inet | grep -v inet6 | awk '{ print $2 }')
	# echo "$USB0_IP"	# test
	if [ -z "$USB0_IP" ]; then
		echo "ERROR: No ip address assigned from dhcp"
	else
		USB0_D=$(route -n | grep $NET_ETH | grep UG | awk '{ print $2 }')
		# echo "$USB0_D"	# test
		if [ -z "$USB0_D" ]; then
			echo "ERROR: Default gateway not set to up from dhcp"
		fi
	fi

fi

if [ "$1" == "-v" ]; then	# verbose
	usbTermCmd "AT!GSTATUS?" "$1"
fi

echo "Finish $PROG $VERSION on $(date '+%Y/%m/%d %H:%M:%S')"
echo ""

exit 0	# done
# EOF