def test_packet_in(self):
# In this tests we will send a packet-in message from the servicer and check if
# packet_in.sniff method works
msg = p4runtime_pb2.StreamMessageResponse()
msg.packet.payload = b'Random packet-in payload'
md = p4runtime_pb2.PacketMetadata()
md.metadata_id = 1
md.value = b'\x00\x01'
msg.packet.metadata.append(md)
# Have to sniff the packet in another thread since this blocks the thread
packet_in = sh.PacketIn()
captured_packet = []
def _sniff_packet(captured_packet):
captured_packet += packet_in.sniff(timeout=1)
_t = Thread(target=_sniff_packet, args=(captured_packet, ))
_t.start()
# TODO: modify the servicer to send stream message?
sh.client.stream_in_q["packet"].put(msg)
_t.join()
self.assertEqual(len(captured_packet), 1)
self.assertEqual(captured_packet[0], msg)
def test_packet_out(self):
expected_msg = p4runtime_pb2.StreamMessageRequest()
expected_msg.packet.payload = b'Random packet-out payload'
md = p4runtime_pb2.PacketMetadata()
md.metadata_id = 1
md.value = b'\x00\x01'
expected_msg.packet.metadata.append(md)
packet_out = sh.PacketOut()
packet_out.payload = b'Random packet-out payload'
packet_out.metadata['egress_port'] = '1'
packet_out.send()
actual_msg = self.servicer.stored_packet_out.get(block=True, timeout=1)
self.assertEqual(actual_msg, expected_msg)
def get_metadata_pb(self, metadata_id, value):
p4runtime_metadata = p4runtime_pb2.PacketMetadata()
p4runtime_metadata.metadata_id = metadata_id
p4runtime_metadata.value = value
return p4runtime_metadata
def get_packetout_metadata_pb(self, metadata_name, value):
p4info_meta = self.get_packetout_meta("packet_out", metadata_name)
p4runtime_metadata = p4runtime_pb2.PacketMetadata()
p4runtime_metadata.metadata_id = p4info_meta.id
p4runtime_metadata.value = encode(value, p4info_meta.bitwidth)
return p4runtime_metadata