def recv(self, timeout=None):
log.debug("Trying to read a msg")
if timeout is None or len(
select.select([self.socket], [], [], timeout)[0]) > 0:
packet = capturePacket(self.socket)
else:
# socket wasn't readable or timeout occurred
return None
arbitration_id = ArbitrationID()
arbitration_id.can_id = packet['CAN ID']
# Flags: EXT, RTR, ERR
flags = (packet['CAN ID'] & MSK_FLAGS) >> 29
rx_msg = SecureMessage(timestamp=packet['Timestamp'],
arbitration_id=arbitration_id,
data=packet['Data'][:-2],
MACs=packet['Data'][-2:])
for dest in rx_msg.destinations:
if dest not in self.nodes:
self.nodes.append(Node(bus=self, address=dest))
self.local_node.on_message_received(rx_msg)
log.debug("Local node address at receiver: %x",
self.local_node.address)
log.debug("arbID at receiver: %s", rx_msg.arbitration_id)
log.debug("ID table entry: %s", self.local_node.id_table)
return rx_msg
def testSend(self):
bus = Bus(channel=can_interface, claimed_addresses=[0, 1])
print "send addr: {0}".format(bus.local_node.address)
arb = ArbitrationID(priority=5,
destination_addresses=[0],
source_address=bus.local_node.address)
msg = SecureMessage(data=[0, 245, 134], arbitration_id=arb)
bus.send(msg)
bus.recv()
class SecureBusTest(unittest.TestCase):
# def testCreateBus(self):
# self.bus = secure.Bus(channel=can_interface)
# self.bus.shutdown()
# def testArbitrationID(self):
# self.arbitration_id = ArbitrationID(priority=5, destination_addresses = [14, 6], source_address=20)
# #check that the number of destinations was correctly set to 2
# self.assertEqual(bin(self.arbitration_id.can_id)[11:13], "10")
def testSend(self):
bus = Bus(channel=can_interface, claimed_addresses=[0, 1])
print "send addr: {0}".format(bus.local_node.address)
arb = ArbitrationID(priority=5,
destination_addresses=[0],
source_address=bus.local_node.address)
msg = SecureMessage(data=[0, 245, 134], arbitration_id=arb)
bus.send(msg)
bus.recv()
def testRecv(self):
bus = Bus(channel=can_interface)
print "recv addr: {0}".format(bus.local_node.address)
print bus.recv(timeout=2)
# def testMACs(self):
# bus = Bus(channel=can_interface, claimed_addresses=[0,1])
# msg = SecureMessage(data=[0, 245, 134, 156])
# msg.destinations.append(1)
# bus.compute_MACs(msg)
# node = bus.get_node(1)
# node.on_message_received(msg)
# self.assertTrue(node.id_table.message_ids)
def testMessage(self):
self.msg = SecureMessage()
another_msg = SecureMessage(arbitration_id=ArbitrationID(priority=7))
self.assertTrue(
self.msg.check_equality(another_msg, ["arbitration_id"]))
class SecureBusTest(unittest.TestCase):
# def testCreateBus(self):
# self.bus = secure.Bus(channel=can_interface)
# self.bus.shutdown()
# def testArbitrationID(self):
# self.arbitration_id = ArbitrationID(priority=5, destination_addresses = [14, 6], source_address=20)
# #check that the number of destinations was correctly set to 2
# self.assertEqual(bin(self.arbitration_id.can_id)[11:13], "10")
def testSend(self):
bus = Bus(channel=can_interface, claimed_addresses=[0, 1])
print "send addr: {0}".format(bus.local_node.address)
arb = ArbitrationID(priority=5, destination_addresses = [0], source_address=bus.local_node.address)
msg = SecureMessage(data=[0, 245, 134], arbitration_id=arb)
bus.send(msg)
bus.recv()
def testRecv(self):
bus = Bus(channel=can_interface)
print "recv addr: {0}".format(bus.local_node.address)
print bus.recv(timeout=2)
# def testMACs(self):
# bus = Bus(channel=can_interface, claimed_addresses=[0,1])
# msg = SecureMessage(data=[0, 245, 134, 156])
# msg.destinations.append(1)
# bus.compute_MACs(msg)
# node = bus.get_node(1)
# node.on_message_received(msg)
# self.assertTrue(node.id_table.message_ids)
def testMessage(self):
self.msg = SecureMessage()
another_msg = SecureMessage(arbitration_id=ArbitrationID(priority=7))
self.assertTrue(self.msg.check_equality(another_msg, ["arbitration_id"]))
def testMessage(self):
self.msg = SecureMessage()
another_msg = SecureMessage(arbitration_id=ArbitrationID(priority=7))
self.assertTrue(self.msg.check_equality(another_msg, ["arbitration_id"]))
def testMessage(self):
self.msg = SecureMessage()
another_msg = SecureMessage(arbitration_id=ArbitrationID(priority=7))
self.assertTrue(
self.msg.check_equality(another_msg, ["arbitration_id"]))
"""
import can
import time
from can.protocols.secure.securemessage import SecureMessage
from can.protocols.secure.arbitrationid import ArbitrationID
from can.protocols.secure import Bus
interface = 'vcan0'
NO_OF_MSGS = 100
USEFUL_BITS = 40
bus = Bus(channel=interface, claimed_addresses=[0, 1])
arb = ArbitrationID(priority=5,
destination_addresses=[1],
source_address=bus.local_node.address)
sum = 0
for i in range(NO_OF_MSGS - 1, 0, -1):
start_time = time.time()
msg = SecureMessage(data=[i], arbitration_id=arb)
bus.send(msg)
timer = time.time() - start_time
sum += timer
time_per_msg = sum / NO_OF_MSGS
print "latency: ", time_per_msg
print "throughput: ", USEFUL_BITS / time_per_msg