def test_bad_cookie(self):
client_transport, server_transport = dummy_dtls_transport_pair()
client = RTCSctpTransport(client_transport)
server = RTCSctpTransport(server_transport)
# corrupt cookie
real_send_chunk = client._send_chunk
async def mock_send_chunk(chunk):
if isinstance(chunk, CookieEchoChunk):
chunk.body = b'garbage'
return await real_send_chunk(chunk)
client._send_chunk = mock_send_chunk
server.start(client.getCapabilities(), client.port)
client.start(server.getCapabilities(), server.port)
# check outcome
run(asyncio.sleep(0.5))
self.assertEqual(client.state, RTCSctpTransport.State.COOKIE_ECHOED)
self.assertEqual(server.state, RTCSctpTransport.State.CLOSED)
# shutdown
run(client.stop())
run(server.stop())
self.assertEqual(client.state, RTCSctpTransport.State.CLOSED)
self.assertEqual(server.state, RTCSctpTransport.State.CLOSED)
def test_stale_cookie(self):
def mock_timestamp():
mock_timestamp.calls += 1
if mock_timestamp.calls == 1:
return 0
else:
return 61
mock_timestamp.calls = 0
client_transport, server_transport = dummy_dtls_transport_pair()
client = RTCSctpTransport(client_transport)
server = RTCSctpTransport(server_transport)
server._get_timestamp = mock_timestamp
server.start(client.getCapabilities(), client.port)
client.start(server.getCapabilities(), server.port)
# check outcome
run(asyncio.sleep(0.5))
self.assertEqual(client.state, RTCSctpTransport.State.CLOSED)
self.assertEqual(server.state, RTCSctpTransport.State.CLOSED)
# shutdown
run(client.stop())
run(server.stop())
self.assertEqual(client.state, RTCSctpTransport.State.CLOSED)
self.assertEqual(server.state, RTCSctpTransport.State.CLOSED)
def test_abrupt_disconnect(self):
"""
Abrupt disconnect causes the __run() loop to exit.
"""
client_transport, server_transport = dummy_dtls_transport_pair()
client = RTCSctpTransport(client_transport)
server = RTCSctpTransport(server_transport)
# connect
server.start(client.getCapabilities(), client.port)
client.start(server.getCapabilities(), server.port)
# check outcome
run(wait_for_outcome(client, server))
self.assertEqual(client.state, RTCSctpTransport.State.ESTABLISHED)
self.assertEqual(server.state, RTCSctpTransport.State.ESTABLISHED)
# break one connection
run(client_transport.close())
run(asyncio.sleep(0.1))
self.assertEqual(client.state, RTCSctpTransport.State.CLOSED)
# break other connection
run(server_transport.close())
run(asyncio.sleep(0.1))
self.assertEqual(server.state, RTCSctpTransport.State.CLOSED)
# try closing again
run(client.stop())
run(server.stop())
def test_abrupt_disconnect_2(self):
"""
Abrupt disconnect causes sending ABORT chunk to fail.
"""
client_transport, server_transport = dummy_dtls_transport_pair()
client = RTCSctpTransport(client_transport)
server = RTCSctpTransport(server_transport)
# connect
server.start(client.getCapabilities(), client.port)
client.start(server.getCapabilities(), server.port)
# check outcome
run(wait_for_outcome(client, server))
self.assertEqual(client.state, RTCSctpTransport.State.ESTABLISHED)
self.assertEqual(server.state, RTCSctpTransport.State.ESTABLISHED)
# break connection
run(client_transport.close())
run(server_transport.close())
# stop
run(client.stop())
run(server.stop())
def test_connect_server_limits_streams(self):
client_transport, server_transport = dummy_dtls_transport_pair()
client = RTCSctpTransport(client_transport)
self.assertFalse(client.is_server)
server = RTCSctpTransport(server_transport)
server.inbound_streams_max = 2048
server.outbound_streams = 256
self.assertTrue(server.is_server)
# connect
server.start(client.getCapabilities(), client.port)
client.start(server.getCapabilities(), server.port)
# check outcome
run(wait_for_outcome(client, server))
self.assertEqual(client.state, RTCSctpTransport.State.ESTABLISHED)
self.assertEqual(client.inbound_streams, 256)
self.assertEqual(client.outbound_streams, 2048)
self.assertEqual(client._remote_extensions, [130])
self.assertEqual(server.state, RTCSctpTransport.State.ESTABLISHED)
self.assertEqual(server.inbound_streams, 2048)
self.assertEqual(server.outbound_streams, 256)
self.assertEqual(server._remote_extensions, [130])
run(asyncio.sleep(0.5))
# shutdown
run(client.stop())
run(server.stop())
self.assertEqual(client.state, RTCSctpTransport.State.CLOSED)
self.assertEqual(server.state, RTCSctpTransport.State.CLOSED)
def test_connect_broken_transport(self):
"""
Transport with 100% loss never connects.
"""
client_transport, server_transport = dummy_dtls_transport_pair(
loss=[True])
client = RTCSctpTransport(client_transport)
client._rto = 0.1
self.assertFalse(client.is_server)
server = RTCSctpTransport(server_transport)
server._rto = 0.1
self.assertTrue(server.is_server)
# connect
server.start(client.getCapabilities(), client.port)
client.start(server.getCapabilities(), server.port)
# check outcome
run(wait_for_outcome(client, server))
self.assertEqual(client.state, RTCSctpTransport.State.CLOSED)
self.assertEqual(server.state, RTCSctpTransport.State.CLOSED)
# shutdown
run(client.stop())
run(server.stop())
self.assertEqual(client.state, RTCSctpTransport.State.CLOSED)
self.assertEqual(server.state, RTCSctpTransport.State.CLOSED)
def test_connect_then_server_creates_data_channel(self):
client_transport, server_transport = dummy_dtls_transport_pair()
client = RTCSctpTransport(client_transport)
self.assertFalse(client.is_server)
server = RTCSctpTransport(server_transport)
self.assertTrue(server.is_server)
client_channels = track_channels(client)
server_channels = track_channels(server)
# connect
server.start(client.getCapabilities(), client.port)
client.start(server.getCapabilities(), server.port)
# check outcome
run(wait_for_outcome(client, server))
self.assertEqual(client.state, RTCSctpTransport.State.ESTABLISHED)
self.assertEqual(server.state, RTCSctpTransport.State.ESTABLISHED)
# create data channel
channel = RTCDataChannel(server, RTCDataChannelParameters(label='chat'))
self.assertEqual(channel.id, None)
self.assertEqual(channel.label, 'chat')
run(asyncio.sleep(0.5))
self.assertEqual(len(client_channels), 1)
self.assertEqual(client_channels[0].id, 0)
self.assertEqual(client_channels[0].label, 'chat')
self.assertEqual(len(server_channels), 0)
# shutdown
run(client.stop())
run(server.stop())
self.assertEqual(client.state, RTCSctpTransport.State.CLOSED)
self.assertEqual(server.state, RTCSctpTransport.State.CLOSED)
def test_connect_lossy_transport(self):
"""
Transport with 25% loss eventually connects.
"""
client_transport, server_transport = dummy_dtls_transport_pair(
loss=[True, False, False, False])
client = RTCSctpTransport(client_transport)
client._rto = 0.1
self.assertFalse(client.is_server)
server = RTCSctpTransport(server_transport)
server._rto = 0.1
self.assertTrue(server.is_server)
# connect
server.start(client.getCapabilities(), client.port)
client.start(server.getCapabilities(), server.port)
# check outcome
run(wait_for_outcome(client, server))
self.assertEqual(client.state, RTCSctpTransport.State.ESTABLISHED)
self.assertEqual(server.state, RTCSctpTransport.State.ESTABLISHED)
# transmit data
server_queue = asyncio.Queue()
async def server_fake_receive(*args):
await server_queue.put(args)
server._receive = server_fake_receive
for i in range(20):
message = (123, i, b'ping')
run(client._send(*message))
received = run(server_queue.get())
self.assertEqual(received, message)
# shutdown
run(client.stop())
run(server.stop())
self.assertEqual(client.state, RTCSctpTransport.State.CLOSED)
self.assertEqual(server.state, RTCSctpTransport.State.CLOSED)
def test_garbage(self):
client_transport, server_transport = dummy_dtls_transport_pair()
server = RTCSctpTransport(server_transport)
server.start(RTCSctpCapabilities(maxMessageSize=65536), 5000)
asyncio.ensure_future(client_transport.send(b'garbage'))
# check outcome
run(asyncio.sleep(0.5))
self.assertEqual(server.state, RTCSctpTransport.State.CLOSED)
# shutdown
run(server.stop())
def test_connect_client_limits_streams(self):
client_transport, server_transport = dummy_dtls_transport_pair()
client = RTCSctpTransport(client_transport)
client.inbound_streams_max = 2048
client.outbound_streams = 256
self.assertFalse(client.is_server)
server = RTCSctpTransport(server_transport)
self.assertTrue(server.is_server)
# connect
server.start(client.getCapabilities(), client.port)
client.start(server.getCapabilities(), server.port)
# check outcome
run(wait_for_outcome(client, server))
self.assertEqual(client.state, RTCSctpTransport.State.ESTABLISHED)
self.assertEqual(client.inbound_streams, 2048)
self.assertEqual(client.outbound_streams, 256)
self.assertEqual(client._remote_extensions, [130])
self.assertEqual(server.state, RTCSctpTransport.State.ESTABLISHED)
self.assertEqual(server.inbound_streams, 256)
self.assertEqual(server.outbound_streams, 2048)
self.assertEqual(server._remote_extensions, [130])
# client requests additional outbound streams
param = StreamAddOutgoingParam(
request_sequence=client._reconfig_request_seq, new_streams=16)
run(client._send_reconfig_param(param))
run(asyncio.sleep(0.5))
self.assertEqual(server.inbound_streams, 272)
self.assertEqual(server.outbound_streams, 2048)
# shutdown
run(client.stop())
run(server.stop())
self.assertEqual(client.state, RTCSctpTransport.State.CLOSED)
self.assertEqual(server.state, RTCSctpTransport.State.CLOSED)
def test_bad_verification_tag(self):
# verification tag is 12345 instead of 0
data = load('sctp_init_bad_verification.bin')
client_transport, server_transport = dummy_dtls_transport_pair()
server = RTCSctpTransport(server_transport)
server.start(RTCSctpCapabilities(maxMessageSize=65536), 5000)
asyncio.ensure_future(client_transport.send(data))
# check outcome
run(asyncio.sleep(0.5))
self.assertEqual(server.state, RTCSctpTransport.State.CLOSED)
# shutdown
run(server.stop())