def create_builder():
return QuicPacketBuilder(
host_cid=bytes(8),
packet_number=0,
peer_cid=bytes(8),
peer_token=b"",
spin_bit=False,
version=QuicProtocolVersion.DRAFT_20,
)
def test_receive_datagram_wrong_version(self):
client = create_standalone_client(self)
builder = QuicPacketBuilder(
host_cid=client._peer_cid,
peer_cid=client.host_cid,
version=0xFF000011, # DRAFT_16
)
crypto = CryptoPair()
crypto.setup_initial(client.host_cid, is_client=False)
builder.start_packet(PACKET_TYPE_INITIAL, crypto)
builder.buffer.push_bytes(bytes(1200))
builder.end_packet()
for datagram in builder.flush()[0]:
client.receive_datagram(datagram, SERVER_ADDR, now=time.time())
self.assertEqual(drop(client), 0)
def test_short_header_padding(self):
builder = QuicPacketBuilder(
host_cid=bytes(8),
packet_number=0,
peer_cid=bytes(8),
peer_token=b"",
spin_bit=False,
version=QuicProtocolVersion.DRAFT_20,
)
crypto = CryptoPair()
crypto.setup_initial(bytes(8), is_client=True)
# ONE_RTT, fully padded
builder.start_packet(PACKET_TYPE_ONE_RTT, crypto)
self.assertEqual(builder.remaining_space, 1253)
builder.start_frame(QuicFrameType.CRYPTO)
builder.buffer.push_bytes(bytes(builder.remaining_space))
self.assertTrue(builder.end_packet())
# check builder
self.assertEqual(builder.buffer.tell(), 0)
self.assertEqual(builder.packet_number, 1)
# check datagrams
datagrams, packets = builder.flush()
self.assertEqual(len(datagrams), 1)
self.assertEqual(len(datagrams[0]), 1280)
self.assertEqual(
packets,
[
QuicSentPacket(
epoch=Epoch.ONE_RTT,
in_flight=True,
is_ack_eliciting=True,
is_crypto_packet=True,
packet_number=0,
sent_bytes=1280,
)
],
)
def test_datagram_received_wrong_version(self):
client, client_transport = create_standalone_client()
self.assertEqual(client_transport.sent, 1)
builder = QuicPacketBuilder(
host_cid=client.peer_cid,
peer_cid=client.host_cid,
version=0xFF000011, # DRAFT_16
)
crypto = CryptoPair()
crypto.setup_initial(client.host_cid, is_client=False)
builder.start_packet(PACKET_TYPE_INITIAL, crypto)
push_bytes(builder.buffer, bytes(1200))
builder.end_packet()
for datagram in builder.flush()[0]:
client.datagram_received(datagram, SERVER_ADDR)
self.assertEqual(client_transport.sent, 1)
def test_long_header_empty(self):
builder = QuicPacketBuilder(
host_cid=bytes(8),
packet_number=0,
peer_cid=bytes(8),
peer_token=b"",
spin_bit=False,
version=QuicProtocolVersion.DRAFT_20,
)
crypto = CryptoPair()
builder.start_packet(PACKET_TYPE_INITIAL, crypto)
self.assertEqual(builder.remaining_space, 1237)
# nothing to write
self.assertFalse(builder.end_packet())
self.assertEqual(builder.buffer.tell(), 0)
self.assertEqual(builder.packet_number, 0)
datagrams, packets = builder.flush()
self.assertEqual(len(datagrams), 0)
self.assertEqual(packets, [])
def test_long_header_then_long_header(self):
builder = QuicPacketBuilder(
host_cid=bytes(8),
packet_number=0,
peer_cid=bytes(8),
peer_token=b"",
spin_bit=False,
version=QuicProtocolVersion.DRAFT_20,
)
crypto = CryptoPair()
crypto.setup_initial(bytes(8), is_client=True)
# INITIAL
builder.start_packet(PACKET_TYPE_INITIAL, crypto)
self.assertEqual(builder.remaining_space, 1237)
builder.start_frame(QuicFrameType.CRYPTO)
push_bytes(builder.buffer, bytes(199))
self.assertEqual(builder.buffer.tell(), 227)
self.assertTrue(builder.end_packet())
self.assertEqual(builder.buffer.tell(), 243)
# HANDSHAKE
builder.start_packet(PACKET_TYPE_HANDSHAKE, crypto)
self.assertEqual(builder.buffer.tell(), 269)
self.assertEqual(builder.remaining_space, 995)
builder.start_frame(QuicFrameType.CRYPTO)
push_bytes(builder.buffer, bytes(299))
self.assertEqual(builder.buffer.tell(), 569)
self.assertTrue(builder.end_packet())
self.assertEqual(builder.buffer.tell(), 585)
# ONE_RTT
builder.start_packet(PACKET_TYPE_ONE_RTT, crypto)
self.assertEqual(builder.remaining_space, 668)
builder.start_frame(QuicFrameType.CRYPTO)
push_bytes(builder.buffer, bytes(299))
self.assertTrue(builder.end_packet())
self.assertEqual(builder.buffer.tell(), 0)
# check datagrams
datagrams, packets = builder.flush()
self.assertEqual(len(datagrams), 1)
self.assertEqual(len(datagrams[0]), 912)
self.assertEqual(
packets,
[
QuicSentPacket(
epoch=Epoch.INITIAL,
is_ack_eliciting=True,
is_crypto_packet=True,
packet_number=0,
sent_bytes=243,
),
QuicSentPacket(
epoch=Epoch.HANDSHAKE,
is_ack_eliciting=True,
is_crypto_packet=True,
packet_number=1,
sent_bytes=342,
),
QuicSentPacket(
epoch=Epoch.ONE_RTT,
is_ack_eliciting=True,
is_crypto_packet=True,
packet_number=2,
sent_bytes=327,
),
],
)