wpa_supplicant/examples/p2p/p2p_listen.py

   1 #!/usr/bin/python
   2 # Tests P2P_Find
   3 # Will listen
   4 # Then Program will exit
   5 ######### MAY NEED TO RUN AS SUDO #############
   6
   7 import dbus
   8 import sys, os
   9 import time
  10 import gobject
  11 import threading
  12 import getopt
  13 from dbus.mainloop.glib import DBusGMainLoop
  14
  15 def usage():
  16         print "Usage:"
  17         print "  %s -i <interface_name> [-t <timeout>] \ " \
  18                 % sys.argv[0]
  19         print "                 [-w <wpas_dbus_interface>]"
  20         print "Options:"
  21         print "  -i = interface name"
  22         print "  -t = timeout = 0s (infinite)"
  23         print "  -w = wpas dbus interface = fi.w1.wpa_supplicant1"
  24         print "Example:"
  25         print "  %s -i wlan0 -t 5" % sys.argv[0]
  26
  27 # Required Signals
  28 def p2pStateChange(status):
  29         print status
  30
  31 class P2P_Listen(threading.Thread):
  32         # Needed Variables
  33         global bus
  34         global wpas_object
  35         global interface_object
  36         global p2p_interface
  37         global interface_name
  38         global wpas
  39         global wpas_dbus_interface
  40         global path
  41         global timeout
  42
  43         # Dbus Paths
  44         global wpas_dbus_opath
  45         global wpas_dbus_interfaces_opath
  46         global wpas_dbus_interfaces_interface
  47         global wpas_dbus_interfaces_p2pdevice
  48
  49         # Constructor
  50         def __init__(self,interface_name,wpas_dbus_interface,timeout):
  51                 # Initializes variables and threads
  52                 self.timeout = int(timeout)
  53                 self.interface_name = interface_name
  54                 self.wpas_dbus_interface = wpas_dbus_interface
  55
  56                 # Initializes thread and daemon allows for ctrl-c kill
  57                 threading.Thread.__init__(self)
  58                 self.daemon = True
  59
  60                 # Generating interface/object paths
  61                 self.wpas_dbus_opath = "/" + \
  62                                 self.wpas_dbus_interface.replace(".","/")
  63                 self.wpas_wpas_dbus_interfaces_opath = self.wpas_dbus_opath + \
  64                                 "/Interfaces"
  65                 self.wpas_dbus_interfaces_interface = \
  66                                 self.wpas_dbus_interface + ".Interface"
  67                 self.wpas_dbus_interfaces_p2pdevice = \
  68                                 self.wpas_dbus_interfaces_interface \
  69                                 + ".P2PDevice"
  70
  71                 # Getting interfaces and objects
  72                 DBusGMainLoop(set_as_default=True)
  73                 self.bus = dbus.SystemBus()
  74                 self.wpas_object = self.bus.get_object(
  75                                 self.wpas_dbus_interface,
  76                                 self.wpas_dbus_opath)
  77                 self.wpas = dbus.Interface(self.wpas_object,
  78                                 self.wpas_dbus_interface)
  79
  80                 # Try to see if supplicant knows about interface
  81                 # If not, throw an exception
  82                 try:
  83                         self.path = self.wpas.GetInterface(
  84                                         self.interface_name)
  85                 except dbus.DBusException as exc:
  86                         error = 'Error:\n  Interface ' + self.interface_name \
  87                                 + ' was not found'
  88                         print error
  89                         usage()
  90                         os._exit(0)
  91
  92                 self.interface_object = self.bus.get_object(
  93                                 self.wpas_dbus_interface, self.path)
  94                 self.p2p_interface = dbus.Interface(self.interface_object,
  95                                 self.wpas_dbus_interfaces_p2pdevice)
  96
  97                 self.bus.add_signal_receiver(p2pStateChange,
  98                         dbus_interface=self.wpas_dbus_interfaces_p2pdevice,
  99                         signal_name="P2PStateChanged")
 100
 101         # Run p2p_find
 102         def run(self):
 103                 # Sets up p2p_listen
 104                 self.p2p_interface.Listen(int(self.timeout))
 105
 106                 # Allows other threads to keep working while MainLoop runs
 107                 # Required for timeout implementation
 108                 gobject.MainLoop().get_context().iteration(True)
 109                 gobject.threads_init()
 110                 gobject.MainLoop().run()
 111
 112 if __name__ == "__main__":
 113
 114         # Defaults for optional inputs
 115         timeout = 0
 116         wpas_dbus_interface = 'fi.w1.wpa_supplicant1'
 117
 118         # interface_name is required
 119         interface_name = None
 120
 121         # Using getopts to handle options
 122         try:
 123                 options, args = getopt.getopt(sys.argv[1:],"hi:t:w:")
 124
 125         except getopt.GetoptError:
 126                 usage()
 127                 quit()
 128
 129         # If theres a switch, override default option
 130         for key, value in options:
 131                 # Help
 132                 if (key == "-h"):
 133                         usage()
 134                         quit()
 135                 # Interface Name
 136                 elif (key == "-i"):
 137                         interface_name = value
 138                 # Timeout
 139                 elif (key == "-t"):
 140                         if ( int(value) >= 0):
 141                                 timeout = value
 142                         else:
 143                                 print "Error:\n  Timeout cannot be negative"
 144                                 usage()
 145                                 quit()
 146                 # Dbus interface
 147                 elif (key == "-w"):
 148                         wpas_dbus_interface = value
 149                 else:
 150                         assert False, "unhandled option"
 151
 152         # Interface name is required and was not given
 153         if (interface_name == None):
 154                 print "Error:\n  interface_name is required"
 155                 usage()
 156                 quit()
 157
 158         # Constructor
 159         try:
 160                 p2p_listen_test = P2P_Listen(interface_name, wpas_dbus_interface, timeout)
 161
 162         except:
 163                 print "Error:\n  Invalid wpas_dbus_interface"
 164                 usage()
 165                 quit()
 166
 167         # Start P2P_Find
 168         p2p_listen_test.start()
 169
 170         try:
 171                 # If timeout is 0, then run forever
 172                 if (int(p2p_listen_test.timeout) == 0):
 173                         while(True):
 174                                 pass
 175                 # Else sleep for (timeout)
 176                 else:
 177                         time.sleep(int(p2p_listen_test.timeout))
 178
 179         except:
 180                 pass
 181
 182         quit()