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#!/usr/bin/python
# Tests P2P_Disconnect
# Will perform disconnect on interface_name
######### MAY NEED TO RUN AS SUDO #############

import dbus
import sys, os
import time
import gobject
import threading
import getopt
from dbus.mainloop.glib import DBusGMainLoop

def usage():
	print "Usage:"
	print "  %s -i <interface_name> \ " \
		% sys.argv[0]
	print "  		[-w <wpas_dbus_interface>]"
	print "Options:"
	print "  -i = interface name"
	print "  -w = wpas dbus interface = fi.w1.wpa_supplicant1"
	print "Example:"
	print "  %s -i p2p-wlan0-0" % sys.argv[0]

# Required Signals
def GroupFinished(status, etc):
	print "Disconnected"	
	os._exit(0)

class P2P_Disconnect (threading.Thread):
	# Needed Variables
	global bus
	global wpas_object
	global interface_object
	global p2p_interface
	global interface_name
	global wpas
	global wpas_dbus_interface
	global path
	global timeout

	# Dbus Paths
	global wpas_dbus_opath
	global wpas_dbus_interfaces_opath
	global wpas_dbus_interfaces_interface
	global wpas_dbus_interfaces_p2pdevice

	# Constructor
	def __init__(self,interface_name,wpas_dbus_interface,timeout):
		# Initializes variables and threads
		self.interface_name = interface_name
		self.wpas_dbus_interface = wpas_dbus_interface
		self.timeout = timeout

		# Initializes thread and daemon allows for ctrl-c kill
		threading.Thread.__init__(self)
		self.daemon = True

		# Generating interface/object paths
		self.wpas_dbus_opath = "/" + \
				self.wpas_dbus_interface.replace(".","/")
		self.wpas_wpas_dbus_interfaces_opath = self.wpas_dbus_opath + \
				"/Interfaces"
		self.wpas_dbus_interfaces_interface = \
				self.wpas_dbus_interface + ".Interface"
		self.wpas_dbus_interfaces_p2pdevice = \
				self.wpas_dbus_interfaces_interface \
				+ ".P2PDevice"

		# Getting interfaces and objects
		DBusGMainLoop(set_as_default=True)
		self.bus = dbus.SystemBus()
		self.wpas_object = self.bus.get_object(
				self.wpas_dbus_interface,
				self.wpas_dbus_opath)
		self.wpas = dbus.Interface(self.wpas_object,
				self.wpas_dbus_interface)

		# Try to see if supplicant knows about interface
		# If not, throw an exception
		try:
			self.path = self.wpas.GetInterface(
					self.interface_name)
		except dbus.DBusException, exc:
			error = 'Error:\n  Interface ' + self.interface_name \
				+ ' was not found'
			print error
			usage()
			os._exit(0)

		self.interface_object = self.bus.get_object(
				self.wpas_dbus_interface, self.path)
		self.p2p_interface = dbus.Interface(self.interface_object,
				self.wpas_dbus_interfaces_p2pdevice)

		# Signals
		self.bus.add_signal_receiver(GroupFinished,
			dbus_interface=self.wpas_dbus_interfaces_p2pdevice,
			signal_name="GroupFinished")

	# Runs p2p_disconnect
	def run(self):
		# Allows other threads to keep working while MainLoop runs
		# Required for timeout implementation
		gobject.MainLoop().get_context().iteration(True)
		gobject.threads_init()
		self.p2p_interface.Disconnect()
		gobject.MainLoop().run()


if __name__ == "__main__":

	timeout = 5
	# Defaults for optional inputs
	wpas_dbus_interface = 'fi.w1.wpa_supplicant1'

	# interface_name is required
	interface_name = None

	# Using getopts to handle options
	try:
		options, args = getopt.getopt(sys.argv[1:],"hi:w:")

	except getopt.GetoptError:
		usage()
		quit()

	# If theres a switch, override default option
	for key, value in options:
		# Help
		if (key == "-h"):
			usage()
			quit()
		# Interface Name
		elif (key == "-i"):
			interface_name = value
		# Dbus interface
		elif (key == "-w"):
			wpas_dbus_interface = value
		else:
			assert False, "unhandled option"

	# Interface name is required and was not given
	if (interface_name == None):
		print "Error:\n  interface_name is required"
		usage()
		quit()

	# Constructor
	try:
		p2p_disconnect_test = P2P_Disconnect(interface_name,
						wpas_dbus_interface,timeout)

	except:
		print "Error:\n  Invalid wpas_dbus_interface"
		usage()
		quit()

	# Start P2P_Disconnect
	p2p_disconnect_test.start()

	try:
		time.sleep(int(p2p_disconnect_test.timeout))

	except:
		pass

	print "Disconnect timed out"
	quit()