#!/bin/bash

SCRIPT_NAME="Bluetooth DUN Discovery & Connection Automation Script v1"

if [ `whoami` = "root" ]; then
	echo $SCRIPT_NAME
else
	echo "$SCRIPT_NAME must be run as root."
	echo "Try again using \"sudo $0\""
	exit
fi

DEVICES=`hcitool dev | egrep [0-9a-fA-F]{2}: | awk '{print $1}'`
DEVICE_COUNT=`printf $DEVICES | awk '{print $2}'`
if [ "$DEVICE_COUNT" = "" ]; then
	DEV=$DEVICES
else
	select DEV in $DEVICES; do
		if [ "$DEV" != "" ]; then
			break;
		fi;
	done;
fi;
echo "Using $DEV..."
echo "Scanning for Bluetooth devices in the vicinity..."

TARGETS=`hcitool -i $DEV scan | egrep [0-9a-fA-F]{2}: | awk '{print $1"="$2}'`
TARGET_COUNT=`printf $TARGETS | awk '{print $2}'`
if [ "$TARGET_COUNT" = "" ]; then
	TARGET=$TARGETS
else
	select TARGET in $TARGETS; do
		if [ "$TARGET" != "" ]; then
			break;
		fi;
	done
fi;
TARGET_BDADDR=`printf $TARGET | sed 's/=.*$//'`
TARGET_NAME=`printf $TARGET | sed 's/=/ /' | awk '{print $2}'`
echo "Searching $TARGET_BDADDR ($TARGET_NAME)..."

CHANNEL=`sdptool search --bdaddr $TARGET_BDADDR DUN | grep Channel | sed 's/[^0-9]//g'`
echo "DUN on $TARGET_NAME is on channel $CHANNEL..."
if [ "$CHANNEL" != "" ]; then
	DEVICE_NUM_ID=`printf $DEV | sed 's/[^0-9]//g'`
	read -p "Save to /etc/bluetooth/rfcomm.conf (y) or run once only (N)? [y/N] " SAVE_OR_ONCE
	if [ "$SAVE_OR_ONCE" = "y" ] || [ "$SAVE_OR_ONCE" = "Y" ]; then
		echo "rfcomm0 {
	bind yes;
	device $TARGET_BDADDR;
	channel $CHANNEL;
	comment "$TARGET_NAME"
}" >> /etc/bluetooth/rfcomm.conf
		echo "Settings saved!"
		cat /etc/bluetooth/rfcomm.conf
	else
		echo "Connecting..."
		rfcomm release $DEVICE_NUM_ID
		rfcomm bind $DEVICE_NUM_ID $TARGET_BDADDR $CHANNEL
	fi;
fi;