#!/bin/sh
# use gainroot to become root and relaunch itself
if [ `id -u` != 0 ] ; then
echo 'root'
#if not already root, call itself as root
exec sudo gainroot <<EOF
exec $0 $*
EOF
exit $?
else
echo 'notroot'
fi
# real script follows

BTADDR='00:1e:7d:94:5e:ce' # replace with your BT Address of phone
BTNAME="WM_Ryan1" # user your Phone BT Name as assigned
#IP=192.168.2.2
#GW=192.168.2.1
NS=192.168.2.1
PAN_ROLE=NAP # remote PAN role, one of NAP, GN

infoprint(){
DBUS_SESSION_BUS_ADDRESS='unixath=/tmp/session_bus_socket' dbus-send --session --print-reply --dest=org.freedesktop.Notifications /org/freedesktop/Notifications org.freedesktop.Notifications.SystemNoteInfoprint "string:$*" &
}

dbus_method(){
local dest=$1
shift
DBUS_REPLY=$(dbus-send 2>&1 --system --type=method_call --print-reply --dest="$dest" $* )
}

dbus_result(){
echo $DBUS_REPLY | cut -d ' ' -f 7 | tr -d \"
}

find_connection(){
#find or create connection
if dbus_method org.bluez /org/bluez org.bluez.Manager.ActivateService string:network ; then
NET_BUS=$(dbus_result)
# echo destination $NET_BUS
if dbus_method "${NET_BUS}" /org/bluez/network org.bluez.network.Manager.FindConnection string:"${BTADDR}" ; then
CONN=$(dbus_result)
else
if dbus_method "${NET_BUS}" /org/bluez/network org.bluez.network.Manager.CreateConnection string:"${BTADDR}" string:"$PAN_ROLE" ; then
CONN=$(dbus_result)
fi
fi
fi
}


bnep_start(){
#find_connection
if [ "$CONN" != "" ] ; then
echo connection $CONN
if dbus_method "${NET_BUS}" ${CONN} org.bluez.network.Connection.Connect ; then
BNEPDEV=$(dbus_result)
echo connected to $BNEPDEV
#ifconfig $BNEPDEV $IP up
#if route -n | grep -q '^0.0.0.0' ; then
# echo "default gateway already set, skipping GW and DNS setting"
#else
# route add default gw $GW
# echo "nameserver $NS" >/tmp/resolv.conf.lo
#fi
udhcpc -i $BNEPDEV
[ -t 1 ] || infoprint "Connected to $BTNAME"
fi
fi
}

bnep_stop(){
#find_connection
if [ "$CONN" != "" ] ; then
echo connection $CONN
if dbus_method "${NET_BUS}" ${CONN} org.bluez.network.Connection.Disconnect ; then
echo "OK, bringing down"
echo -n '' >/tmp/resolv.conf.lo
[ -t 1 ] || infoprint "$BTNAME disconnected"
fi
fi
}

echo "Searching for $BTADDR ..."
[ -t 1 ] || infoprint "Searching for $BTADDR"
find_connection
if [ "$CONN" = "" ] ; then
echo $DBUS_REPLY
echo "Setting up connection to $BTADDR failed"
[ -t 1 ] || infoprint "Connection to $BTADDR failed"
exit
fi

COMMAND=$1
if [ "$COMMAND" = "" ] ; then
dbus_method "${NET_BUS}" ${CONN} org.bluez.network.Connection.IsConnected
if [ "$(dbus_result)" = "true" ] ; then
COMMAND=stop
else
COMMAND=start
fi
echo $COMMAND
fi

case $COMMAND in
start) bnep_start ;;
stop) bnep_stop ;;
esac