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import asyncio
import ssl
import unittest
from typing import Any, Optional
from aioice import stun, turn
from .echoserver import run_echo_server
from .turnserver import run_turn_server
from .utils import asynctest, read_message
class DummyClientProtocol(asyncio.DatagramProtocol):
def __init__(self) -> None:
self.received: list[tuple[bytes, tuple[str, int]]] = []
def datagram_received(self, data: bytes, addr: tuple[str, int]) -> None:
self.received.append((data, addr))
class TurnClientTcpProtocolTest(unittest.TestCase):
def setUp(self) -> None:
class MockTransport(asyncio.BaseTransport):
def get_extra_info(self, name: str, default: Any = None) -> Any:
return ("1.2.3.4", 1234)
self.protocol = turn.TurnClientTcpProtocol(
("1.2.3.4", 1234),
username="foo",
password="bar",
lifetime=turn.DEFAULT_ALLOCATION_LIFETIME,
channel_refresh_time=turn.DEFAULT_CHANNEL_REFRESH_TIME,
)
self.protocol.connection_made(MockTransport())
def test_receive_stun_fragmented(self) -> None:
data = read_message("binding_request.bin")
self.protocol.data_received(data[0:10])
self.protocol.data_received(data[10:])
def test_receive_junk(self) -> None:
self.protocol.data_received(b"\x00" * 20)
def test_repr(self) -> None:
self.assertEqual(repr(self.protocol), "turn/tcp")
class TurnClientUdpProtocolTest(unittest.TestCase):
def setUp(self) -> None:
self.protocol = turn.TurnClientUdpProtocol(
("1.2.3.4", 1234),
username="foo",
password="bar",
lifetime=turn.DEFAULT_ALLOCATION_LIFETIME,
channel_refresh_time=turn.DEFAULT_CHANNEL_REFRESH_TIME,
)
def test_receive_junk(self) -> None:
self.protocol.datagram_received(b"\x00" * 20, ("1.2.3.4", 1234))
def test_repr(self) -> None:
self.assertEqual(repr(self.protocol), "turn/udp")
class TurnTest(unittest.TestCase):
@asynctest
async def test_tcp_transport(self) -> None:
await self._test_transport("tcp", "tcp_address")
@asynctest
async def test_tls_transport(self) -> None:
ssl_context = ssl.SSLContext(protocol=ssl.PROTOCOL_TLS_CLIENT)
ssl_context.check_hostname = False
ssl_context.verify_mode = ssl.CERT_NONE
await self._test_transport("tcp", "tls_address", ssl=ssl_context)
@asynctest
async def test_udp_transport(self) -> None:
await self._test_transport("udp", "udp_address")
async def _test_transport(
self,
transport: str,
server_addr_attr: str,
ssl: Optional[ssl.SSLContext] = None,
) -> None:
await self._test_transport_ok(
transport=transport, server_addr_attr=server_addr_attr, ssl=ssl
)
await self._test_transport_ok_multi(
transport=transport, server_addr_attr=server_addr_attr, ssl=ssl
)
await self._test_transport_allocate_failure(
transport=transport, server_addr_attr=server_addr_attr, ssl=ssl
)
await self._test_transport_delete_failure(
transport=transport, server_addr_attr=server_addr_attr, ssl=ssl
)
async def _test_transport_ok(
self, *, transport: str, server_addr_attr: str, ssl: Optional[ssl.SSLContext]
) -> None:
async with run_turn_server(users={"foo": "bar"}) as turn_server:
turn_transport, protocol = await turn.create_turn_endpoint(
DummyClientProtocol,
server_addr=getattr(turn_server, server_addr_attr),
username="foo",
password="bar",
channel_refresh_time=5,
lifetime=6,
ssl=ssl,
transport=transport,
)
self.assertIsNone(turn_transport.get_extra_info("peername"))
self.assertIsNotNone(turn_transport.get_extra_info("sockname"))
async with run_echo_server() as echo_server:
# bind channel, send ping, expect pong
turn_transport.sendto(b"ping", echo_server.udp_address)
await asyncio.sleep(1)
self.assertEqual(
protocol.received, [(b"ping", echo_server.udp_address)]
)
# wait some more to allow allocation refresh
protocol.received.clear()
await asyncio.sleep(5)
# refresh channel, send ping, expect pong
turn_transport.sendto(b"ping", echo_server.udp_address)
await asyncio.sleep(1)
self.assertEqual(
protocol.received, [(b"ping", echo_server.udp_address)]
)
# close
turn_transport.close()
await asyncio.sleep(0)
async def _test_transport_ok_multi(
self, *, transport: str, server_addr_attr: str, ssl: Optional[ssl.SSLContext]
) -> None:
async with run_turn_server(users={"foo": "bar"}) as turn_server:
turn_transport, protocol = await turn.create_turn_endpoint(
DummyClientProtocol,
server_addr=getattr(turn_server, server_addr_attr),
username="foo",
password="bar",
channel_refresh_time=5,
lifetime=6,
ssl=ssl,
transport=transport,
)
self.assertIsNone(turn_transport.get_extra_info("peername"))
self.assertIsNotNone(turn_transport.get_extra_info("sockname"))
# Bind channel, send ping, expect pong.
#
# We use different lengths to trigger both padded an unpadded
# ChannelData messages over TCP.
async with run_echo_server() as echo_server1:
async with run_echo_server() as echo_server2:
turn_transport.sendto(
b"ping", echo_server1.udp_address
) # never padded
turn_transport.sendto(b"ping11", echo_server1.udp_address)
turn_transport.sendto(b"ping20", echo_server2.udp_address)
turn_transport.sendto(b"ping21", echo_server2.udp_address)
await asyncio.sleep(1)
self.assertEqual(
sorted(protocol.received),
[
(b"ping", echo_server1.udp_address),
(b"ping11", echo_server1.udp_address),
(b"ping20", echo_server2.udp_address),
(b"ping21", echo_server2.udp_address),
],
)
# close
turn_transport.close()
await asyncio.sleep(0)
async def _test_transport_allocate_failure(
self, *, transport: str, server_addr_attr: str, ssl: Optional[ssl.SSLContext]
) -> None:
async with run_turn_server(users={"foo": "bar"}) as turn_server:
# Invalid username.
with self.assertRaises(stun.TransactionFailed) as cm:
await turn.create_turn_endpoint(
DummyClientProtocol,
server_addr=getattr(turn_server, server_addr_attr),
username="unknown",
password="bar",
ssl=ssl,
transport=transport,
)
self.assertEqual(
str(cm.exception), "STUN transaction failed (401 - Unauthorized)"
)
# Invalid password.
with self.assertRaises(stun.TransactionFailed) as cm:
await turn.create_turn_endpoint(
DummyClientProtocol,
server_addr=getattr(turn_server, server_addr_attr),
username="foo",
password="wrong",
ssl=ssl,
transport=transport,
)
self.assertEqual(
str(cm.exception), "STUN transaction failed (401 - Unauthorized)"
)
# make the server reject the ALLOCATE request
turn_server.simulated_failure = (403, "Forbidden")
with self.assertRaises(stun.TransactionFailed) as cm:
await turn.create_turn_endpoint(
DummyClientProtocol,
server_addr=getattr(turn_server, server_addr_attr),
username="foo",
password="bar",
ssl=ssl,
transport=transport,
)
self.assertEqual(
str(cm.exception), "STUN transaction failed (403 - Forbidden)"
)
async def _test_transport_delete_failure(
self, *, transport: str, server_addr_attr: str, ssl: Optional[ssl.SSLContext]
) -> None:
async with run_turn_server(users={"foo": "bar"}) as turn_server:
turn_transport, protocol = await turn.create_turn_endpoint(
DummyClientProtocol,
server_addr=getattr(turn_server, server_addr_attr),
username="foo",
password="bar",
ssl=ssl,
transport=transport,
)
self.assertIsNone(turn_transport.get_extra_info("peername"))
self.assertIsNotNone(turn_transport.get_extra_info("sockname"))
# make the server reject the final REFRESH request
turn_server.simulated_failure = (403, "Forbidden")
# close client
turn_transport.close()
await asyncio.sleep(0)
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