test-runner: Use DBus for hwsim radios

Use the hwsim DBus API rather than command line. This both is
faster and more dynamic than doing so with the command line.
This also avoids tracking the radio ID since we can just hang
on to the radio Dbus object directly.

tools/test-runner

@@ -41,7 +41,6 @@ TIOCSTTY = 0x540E
 
 config = None
 intf_id = 0
-rad_id = 0
 
 TEST_MAX_TIMEOUT = 120
 
@@ -314,35 +313,26 @@ class VirtualRadio(Radio):
 		than the command line.
 	'''
 	def __init__(self, name, config=None):
-		global rad_id
-
-		super().__init__(name)
-
 		self.disable_cipher = None
 		self.disable_iftype = None
 
-		args = ['hwsim', '--create', '--name', self.name, '--nointerface', '--p2p']
+		hwsim = importlib.import_module('hwsim').Hwsim()
 
 		if config:
-			self.disable_iftype = config.get('iftype_disable', False)
+			self.disable_iftype = config.get('iftype_disable', None)
-			if self.disable_iftype:
+			self.disable_cipher = config.get('cipher_disable', None)
-				args.append('--iftype-disable')
-				args.append(self.disable_iftype)
 
-			self.disable_cipher = config.get('cipher_disable', False)
+		self._radio = hwsim.radios.create(name, p2p_device=True,
-			if self.disable_cipher:
+					iftype_disable=self.disable_iftype,
-				args.append('--cipher-disable')
+					cipher_disable=self.disable_cipher)
-				args.append(self.disable_cipher)
 
-		Process(args, wait=True)
+		super().__init__(self._radio.name)
-
-		self.id = rad_id
-		rad_id += 1
 
 	def __del__(self):
 		super().__del__()
 
-		Process(['hwsim', '--destroy=%s' % self.id])
+		self._radio.remove()
+		self._radio = None
 
 	def __str__(self):
 		ret = super().__str__()