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_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)