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|
import asyncio
import datetime
from unittest import TestCase
from unittest.mock import patch
from aiortc.rtcdtlstransport import (
SRTP_AEAD_AES_256_GCM,
SRTP_AES128_CM_SHA1_80,
RTCCertificate,
RTCDtlsFingerprint,
RTCDtlsParameters,
RTCDtlsTransport,
RtpRouter,
)
from aiortc.rtcrtpparameters import (
RTCRtpCodecParameters,
RTCRtpDecodingParameters,
RTCRtpReceiveParameters,
)
from aiortc.rtp import (
RTCP_PSFB_APP,
RTCP_PSFB_PLI,
RTCP_RTPFB_NACK,
RtcpByePacket,
RtcpPsfbPacket,
RtcpReceiverInfo,
RtcpRrPacket,
RtcpRtpfbPacket,
RtcpSenderInfo,
RtcpSrPacket,
RtpPacket,
pack_remb_fci,
)
from OpenSSL import SSL
from .utils import asynctest, dummy_ice_transport_pair, load
RTP = load("rtp.bin")
RTCP = load("rtcp_sr.bin")
class BrokenDataReceiver:
def __init__(self):
self.data = []
async def _handle_data(self, data):
raise Exception("some error")
class DummyDataReceiver:
def __init__(self):
self.data = []
async def _handle_data(self, data):
self.data.append(data)
class DummyRtpReceiver:
def __init__(self):
self.rtp_packets = []
self.rtcp_packets = []
def _handle_disconnect(self):
pass
async def _handle_rtp_packet(self, packet, arrival_time_ms):
self.rtp_packets.append(packet)
async def _handle_rtcp_packet(self, packet):
self.rtcp_packets.append(packet)
class RTCCertificateTest(TestCase):
def test_generate(self):
certificate = RTCCertificate.generateCertificate()
self.assertIsNotNone(certificate)
expires = certificate.expires
self.assertIsNotNone(expires)
self.assertIsInstance(expires, datetime.datetime)
fingerprints = certificate.getFingerprints()
self.assertEqual(len(fingerprints), 3)
self.assertEqual(fingerprints[0].algorithm, "sha-256")
self.assertEqual(len(fingerprints[0].value), 95)
self.assertEqual(fingerprints[1].algorithm, "sha-384")
self.assertEqual(len(fingerprints[1].value), 143)
self.assertEqual(fingerprints[2].algorithm, "sha-512")
self.assertEqual(len(fingerprints[2].value), 191)
class RTCDtlsTransportTest(TestCase):
def assertCounters(self, transport_a, transport_b, packets_sent_a, packets_sent_b):
stats_a = transport_a._get_stats()[transport_a._stats_id]
stats_b = transport_b._get_stats()[transport_b._stats_id]
self.assertEqual(stats_a.packetsSent, packets_sent_a)
self.assertEqual(stats_a.packetsReceived, packets_sent_b)
self.assertGreater(stats_a.bytesSent, 0)
self.assertGreater(stats_a.bytesReceived, 0)
self.assertEqual(stats_b.packetsSent, packets_sent_b)
self.assertEqual(stats_b.packetsReceived, packets_sent_a)
self.assertGreater(stats_b.bytesSent, 0)
self.assertGreater(stats_b.bytesReceived, 0)
self.assertEqual(stats_a.bytesSent, stats_b.bytesReceived)
self.assertEqual(stats_b.bytesSent, stats_a.bytesReceived)
@asynctest
async def test_data(self):
transport1, transport2 = dummy_ice_transport_pair()
certificate1 = RTCCertificate.generateCertificate()
session1 = RTCDtlsTransport(transport1, [certificate1])
receiver1 = DummyDataReceiver()
session1._register_data_receiver(receiver1)
certificate2 = RTCCertificate.generateCertificate()
session2 = RTCDtlsTransport(transport2, [certificate2])
receiver2 = DummyDataReceiver()
session2._register_data_receiver(receiver2)
await asyncio.gather(
session1.start(session2.getLocalParameters()),
session2.start(session1.getLocalParameters()),
)
# send encypted data
await session1._send_data(b"ping")
await asyncio.sleep(0.1)
self.assertEqual(receiver2.data, [b"ping"])
await session2._send_data(b"pong")
await asyncio.sleep(0.1)
self.assertEqual(receiver1.data, [b"pong"])
# shutdown
await session1.stop()
await asyncio.sleep(0.1)
self.assertEqual(session1.state, "closed")
self.assertEqual(session2.state, "closed")
# try closing again
await session1.stop()
await session2.stop()
# try sending after close
with self.assertRaises(ConnectionError):
await session1._send_data(b"foo")
@asynctest
async def test_data_handler_error(self):
transport1, transport2 = dummy_ice_transport_pair()
certificate1 = RTCCertificate.generateCertificate()
session1 = RTCDtlsTransport(transport1, [certificate1])
receiver1 = DummyDataReceiver()
session1._register_data_receiver(receiver1)
certificate2 = RTCCertificate.generateCertificate()
session2 = RTCDtlsTransport(transport2, [certificate2])
session2._register_data_receiver(BrokenDataReceiver())
await asyncio.gather(
session1.start(session2.getLocalParameters()),
session2.start(session1.getLocalParameters()),
)
# send encypted data
await session1._send_data(b"ping")
await asyncio.sleep(0.1)
# shutdown
await session1.stop()
await session2.stop()
@asynctest
async def test_rtp(self):
transport1, transport2 = dummy_ice_transport_pair()
certificate1 = RTCCertificate.generateCertificate()
session1 = RTCDtlsTransport(transport1, [certificate1])
receiver1 = DummyRtpReceiver()
session1._register_rtp_receiver(
receiver1,
RTCRtpReceiveParameters(
codecs=[
RTCRtpCodecParameters(
mimeType="audio/PCMU", clockRate=8000, payloadType=0
)
],
encodings=[RTCRtpDecodingParameters(ssrc=1831097322, payloadType=0)],
),
)
certificate2 = RTCCertificate.generateCertificate()
session2 = RTCDtlsTransport(transport2, [certificate2])
receiver2 = DummyRtpReceiver()
session2._register_rtp_receiver(
receiver2,
RTCRtpReceiveParameters(
codecs=[
RTCRtpCodecParameters(
mimeType="audio/PCMU", clockRate=8000, payloadType=0
)
],
encodings=[RTCRtpDecodingParameters(ssrc=4028317929, payloadType=0)],
),
)
await asyncio.gather(
session1.start(session2.getLocalParameters()),
session2.start(session1.getLocalParameters()),
)
self.assertCounters(session1, session2, 2, 2)
# send RTP
await session1._send_rtp(RTP)
await asyncio.sleep(0.1)
self.assertCounters(session1, session2, 3, 2)
self.assertEqual(len(receiver2.rtcp_packets), 0)
self.assertEqual(len(receiver2.rtp_packets), 1)
# send RTCP
await session2._send_rtp(RTCP)
await asyncio.sleep(0.1)
self.assertCounters(session1, session2, 3, 3)
self.assertEqual(len(receiver1.rtcp_packets), 1)
self.assertEqual(len(receiver1.rtp_packets), 0)
# shutdown
await session1.stop()
await asyncio.sleep(0.1)
self.assertCounters(session1, session2, 4, 3)
self.assertEqual(session1.state, "closed")
self.assertEqual(session2.state, "closed")
# try closing again
await session1.stop()
await session2.stop()
# try sending after close
with self.assertRaises(ConnectionError):
await session1._send_rtp(RTP)
@asynctest
async def test_rtp_malformed(self):
transport1, transport2 = dummy_ice_transport_pair()
certificate1 = RTCCertificate.generateCertificate()
session1 = RTCDtlsTransport(transport1, [certificate1])
# receive truncated RTP
await session1._handle_rtp_data(RTP[0:8], 0)
# receive truncated RTCP
await session1._handle_rtcp_data(RTCP[0:8])
@asynctest
async def test_srtp_unprotect_error(self):
transport1, transport2 = dummy_ice_transport_pair()
certificate1 = RTCCertificate.generateCertificate()
session1 = RTCDtlsTransport(transport1, [certificate1])
receiver1 = DummyRtpReceiver()
session1._register_rtp_receiver(
receiver1,
RTCRtpReceiveParameters(
codecs=[
RTCRtpCodecParameters(
mimeType="audio/PCMU", clockRate=8000, payloadType=0
)
],
encodings=[RTCRtpDecodingParameters(ssrc=1831097322, payloadType=0)],
),
)
certificate2 = RTCCertificate.generateCertificate()
session2 = RTCDtlsTransport(transport2, [certificate2])
receiver2 = DummyRtpReceiver()
session2._register_rtp_receiver(
receiver2,
RTCRtpReceiveParameters(
codecs=[
RTCRtpCodecParameters(
mimeType="audio/PCMU", clockRate=8000, payloadType=0
)
],
encodings=[RTCRtpDecodingParameters(ssrc=4028317929, payloadType=0)],
),
)
await asyncio.gather(
session1.start(session2.getLocalParameters()),
session2.start(session1.getLocalParameters()),
)
# send same RTP twice, to trigger error on the receiver side:
# "replay check failed (bad index)"
await session1._send_rtp(RTP)
await session1._send_rtp(RTP)
await asyncio.sleep(0.1)
self.assertEqual(len(receiver2.rtcp_packets), 0)
self.assertEqual(len(receiver2.rtp_packets), 1)
# shutdown
await session1.stop()
await session2.stop()
@asynctest
async def test_abrupt_disconnect(self):
transport1, transport2 = dummy_ice_transport_pair()
certificate1 = RTCCertificate.generateCertificate()
session1 = RTCDtlsTransport(transport1, [certificate1])
certificate2 = RTCCertificate.generateCertificate()
session2 = RTCDtlsTransport(transport2, [certificate2])
await asyncio.gather(
session1.start(session2.getLocalParameters()),
session2.start(session1.getLocalParameters()),
)
# break connections -> tasks exits
await transport1.stop()
await transport2.stop()
await asyncio.sleep(0.1)
# close DTLS
await session1.stop()
await session2.stop()
# check outcome
self.assertEqual(session1.state, "closed")
self.assertEqual(session2.state, "closed")
@asynctest
async def test_abrupt_disconnect_2(self):
transport1, transport2 = dummy_ice_transport_pair()
certificate1 = RTCCertificate.generateCertificate()
session1 = RTCDtlsTransport(transport1, [certificate1])
certificate2 = RTCCertificate.generateCertificate()
session2 = RTCDtlsTransport(transport2, [certificate2])
await asyncio.gather(
session1.start(session2.getLocalParameters()),
session2.start(session1.getLocalParameters()),
)
def fake_write_ssl():
raise ConnectionError
session1._write_ssl = fake_write_ssl
# close DTLS -> ConnectionError
await session1.stop()
await session2.stop()
await asyncio.sleep(0.1)
# check outcome
self.assertEqual(session1.state, "closed")
self.assertEqual(session2.state, "closed")
@asynctest
async def test_bad_client_fingerprint(self):
transport1, transport2 = dummy_ice_transport_pair()
certificate1 = RTCCertificate.generateCertificate()
session1 = RTCDtlsTransport(transport1, [certificate1])
certificate2 = RTCCertificate.generateCertificate()
session2 = RTCDtlsTransport(transport2, [certificate2])
bogus_parameters = RTCDtlsParameters(
fingerprints=[
RTCDtlsFingerprint(algorithm="sha-256", value="bogus_fingerprint")
]
)
await asyncio.gather(
session1.start(bogus_parameters),
session2.start(session1.getLocalParameters()),
)
self.assertEqual(session1.state, "failed")
self.assertEqual(session2.state, "connected")
await session1.stop()
await session2.stop()
@patch("aiortc.rtcdtlstransport.SSL.Connection.do_handshake")
@asynctest
async def test_handshake_error(self, mock_do_handshake):
mock_do_handshake.side_effect = SSL.Error(
[("SSL routines", "", "decryption failed or bad record mac")]
)
transport1, transport2 = dummy_ice_transport_pair()
certificate1 = RTCCertificate.generateCertificate()
session1 = RTCDtlsTransport(transport1, [certificate1])
certificate2 = RTCCertificate.generateCertificate()
session2 = RTCDtlsTransport(transport2, [certificate2])
await asyncio.gather(
session1.start(session2.getLocalParameters()),
session2.start(session1.getLocalParameters()),
)
self.assertEqual(session1.state, "failed")
self.assertEqual(session2.state, "failed")
await session1.stop()
await session2.stop()
@asynctest
async def test_handshake_error_no_common_srtp_profile(self):
transport1, transport2 = dummy_ice_transport_pair()
certificate1 = RTCCertificate.generateCertificate()
session1 = RTCDtlsTransport(transport1, [certificate1])
session1._srtp_profiles = [SRTP_AEAD_AES_256_GCM]
certificate2 = RTCCertificate.generateCertificate()
session2 = RTCDtlsTransport(transport2, [certificate2])
session2._srtp_profiles = [SRTP_AES128_CM_SHA1_80]
await asyncio.gather(
session1.start(session2.getLocalParameters()),
session2.start(session1.getLocalParameters()),
)
self.assertEqual(session1.state, "failed")
self.assertEqual(session2.state, "failed")
await session1.stop()
await session2.stop()
@asynctest
async def test_lossy_channel(self):
"""
Transport with 25% loss eventually connects.
"""
transport1, transport2 = dummy_ice_transport_pair()
loss_pattern = [True, False, False, False]
transport1._connection.loss_pattern = loss_pattern
transport2._connection.loss_pattern = loss_pattern
certificate1 = RTCCertificate.generateCertificate()
session1 = RTCDtlsTransport(transport1, [certificate1])
certificate2 = RTCCertificate.generateCertificate()
session2 = RTCDtlsTransport(transport2, [certificate2])
await asyncio.gather(
session1.start(session2.getLocalParameters()),
session2.start(session1.getLocalParameters()),
)
await session1.stop()
await session2.stop()
class RtpRouterTest(TestCase):
def test_route_rtcp(self):
receiver = object()
sender = object()
router = RtpRouter()
router.register_receiver(receiver, ssrcs=[1234, 2345], payload_types=[96, 97])
router.register_sender(sender, ssrc=3456)
# BYE
packet = RtcpByePacket(sources=[1234, 2345])
self.assertEqual(router.route_rtcp(packet), set([receiver]))
# RR
packet = RtcpRrPacket(
ssrc=1234,
reports=[
RtcpReceiverInfo(
ssrc=3456,
fraction_lost=0,
packets_lost=0,
highest_sequence=630,
jitter=1906,
lsr=0,
dlsr=0,
)
],
)
self.assertEqual(router.route_rtcp(packet), set([sender]))
# SR
packet = RtcpSrPacket(
ssrc=1234,
sender_info=RtcpSenderInfo(
ntp_timestamp=0, rtp_timestamp=0, packet_count=0, octet_count=0
),
reports=[
RtcpReceiverInfo(
ssrc=3456,
fraction_lost=0,
packets_lost=0,
highest_sequence=630,
jitter=1906,
lsr=0,
dlsr=0,
)
],
)
self.assertEqual(router.route_rtcp(packet), set([receiver, sender]))
# PSFB - PLI
packet = RtcpPsfbPacket(fmt=RTCP_PSFB_PLI, ssrc=1234, media_ssrc=3456)
self.assertEqual(router.route_rtcp(packet), set([sender]))
# PSFB - REMB
packet = RtcpPsfbPacket(
fmt=RTCP_PSFB_APP,
ssrc=1234,
media_ssrc=0,
fci=pack_remb_fci(4160000, [3456]),
)
self.assertEqual(router.route_rtcp(packet), set([sender]))
# PSFB - JUNK
packet = RtcpPsfbPacket(fmt=RTCP_PSFB_APP, ssrc=1234, media_ssrc=0, fci=b"JUNK")
self.assertEqual(router.route_rtcp(packet), set())
# RTPFB
packet = RtcpRtpfbPacket(fmt=RTCP_RTPFB_NACK, ssrc=1234, media_ssrc=3456)
self.assertEqual(router.route_rtcp(packet), set([sender]))
def test_route_rtp(self):
receiver1 = object()
receiver2 = object()
router = RtpRouter()
router.register_receiver(receiver1, ssrcs=[1234, 2345], payload_types=[96, 97])
router.register_receiver(receiver2, ssrcs=[3456, 4567], payload_types=[98, 99])
# known SSRC and payload type
self.assertEqual(
router.route_rtp(RtpPacket(ssrc=1234, payload_type=96)), receiver1
)
self.assertEqual(
router.route_rtp(RtpPacket(ssrc=2345, payload_type=97)), receiver1
)
self.assertEqual(
router.route_rtp(RtpPacket(ssrc=3456, payload_type=98)), receiver2
)
self.assertEqual(
router.route_rtp(RtpPacket(ssrc=4567, payload_type=99)), receiver2
)
# unknown SSRC, known payload type
self.assertEqual(
router.route_rtp(RtpPacket(ssrc=5678, payload_type=96)), receiver1
)
self.assertEqual(router.ssrc_table[5678], receiver1)
# unknown SSRC and payload type
self.assertEqual(router.route_rtp(RtpPacket(ssrc=6789, payload_type=100)), None)
def test_route_rtp_ambiguous_payload_type(self):
receiver1 = object()
receiver2 = object()
router = RtpRouter()
router.register_receiver(receiver1, ssrcs=[1234, 2345], payload_types=[96, 97])
router.register_receiver(receiver2, ssrcs=[3456, 4567], payload_types=[96, 97])
# known SSRC and payload type
self.assertEqual(
router.route_rtp(RtpPacket(ssrc=1234, payload_type=96)), receiver1
)
self.assertEqual(
router.route_rtp(RtpPacket(ssrc=2345, payload_type=97)), receiver1
)
self.assertEqual(
router.route_rtp(RtpPacket(ssrc=3456, payload_type=96)), receiver2
)
self.assertEqual(
router.route_rtp(RtpPacket(ssrc=4567, payload_type=97)), receiver2
)
# unknown SSRC, ambiguous payload type
self.assertEqual(router.route_rtp(RtpPacket(ssrc=5678, payload_type=96)), None)
self.assertEqual(router.route_rtp(RtpPacket(ssrc=5678, payload_type=97)), None)
|
