def _make_connection(self, channel, data):
ctx = channel.server.ctx
buf = Buffer(data=data)
header = pull_quic_header(buf,
host_cid_length=ctx.connection_id_length)
# version negotiation
if header.version is not None and header.version not in ctx.supported_versions:
self.channel.push(
encode_quic_version_negotiation(
source_cid=header.destination_cid,
destination_cid=header.source_cid,
supported_versions=ctx.supported_versions,
))
return
conn = self.conns.get(header.destination_cid)
if conn:
conn._linked_channel.close()
conn._linked_channel = channel
self.quic = conn._quic
self.conn = conn
return
if header.packet_type != PACKET_TYPE_INITIAL or len(data) < 1200:
return
original_connection_id = None
if self._retry is not None:
if not header.token:
# create a retry token
channel.push(
encode_quic_retry(
version=header.version,
source_cid=os.urandom(8),
destination_cid=header.source_cid,
original_destination_cid=header.destination_cid,
retry_token=self._retry.create_token(
channel.addr, header.destination_cid)))
return
else:
try:
original_connection_id = self._retry.validate_token(
channel.addr, header.token)
except ValueError:
return
self.quic = QuicConnection(
configuration=ctx,
logger_connection_id=original_connection_id
or header.destination_cid,
original_connection_id=original_connection_id,
session_ticket_fetcher=channel.server.ticket_store.pop,
session_ticket_handler=channel.server.ticket_store.add)
self.conn = H3Connection(self.quic)
self.conn._linked_channel = channel
def test_pull_retry(self):
original_destination_cid = binascii.unhexlify("fbbd219b7363b64b")
data = load("retry.bin")
buf = Buffer(data=data)
header = pull_quic_header(buf, host_cid_length=8)
self.assertTrue(header.is_long_header)
self.assertEqual(header.version, QuicProtocolVersion.VERSION_1)
self.assertEqual(header.packet_type, PACKET_TYPE_RETRY)
self.assertEqual(header.destination_cid,
binascii.unhexlify("e9d146d8d14cb28e"))
self.assertEqual(
header.source_cid,
binascii.unhexlify("0b0a205a648fcf82d85f128b67bbe08053e6"),
)
self.assertEqual(
header.token,
binascii.unhexlify(
"44397a35d698393c134b08a932737859f446d3aadd00ed81540c8d8de172"
"906d3e7a111b503f9729b8928e7528f9a86a4581f9ebb4cb3b53c283661e"
"8530741a99192ee56914c5626998ec0f"),
)
self.assertEqual(
header.integrity_tag,
binascii.unhexlify("4620aafd42f1d630588b27575a12da5c"))
self.assertEqual(header.rest_length, 0)
self.assertEqual(buf.tell(), 125)
# check integrity
if False:
self.assertEqual(
get_retry_integrity_tag(
buf.data_slice(0, 109),
original_destination_cid,
version=header.version,
),
header.integrity_tag,
)
# serialize
encoded = encode_quic_retry(
version=header.version,
source_cid=header.source_cid,
destination_cid=header.destination_cid,
original_destination_cid=original_destination_cid,
retry_token=header.token,
)
with open("bob.bin", "wb") as fp:
fp.write(encoded)
self.assertEqual(encoded, data)
def test_pull_retry_draft_28(self):
original_destination_cid = binascii.unhexlify("fbbd219b7363b64b")
data = load("retry_draft_28.bin")
buf = Buffer(data=data)
header = pull_quic_header(buf, host_cid_length=8)
self.assertTrue(header.is_long_header)
self.assertEqual(header.version, QuicProtocolVersion.DRAFT_28)
self.assertEqual(header.packet_type, PACKET_TYPE_RETRY)
self.assertEqual(header.destination_cid,
binascii.unhexlify("e9d146d8d14cb28e"))
self.assertEqual(
header.source_cid,
binascii.unhexlify("0b0a205a648fcf82d85f128b67bbe08053e6"),
)
self.assertEqual(
header.token,
binascii.unhexlify(
"44397a35d698393c134b08a932737859f446d3aadd00ed81540c8d8de172"
"906d3e7a111b503f9729b8928e7528f9a86a4581f9ebb4cb3b53c283661e"
"8530741a99192ee56914c5626998ec0f"),
)
self.assertEqual(
header.integrity_tag,
binascii.unhexlify("f15154a271f10139ef6b129033ac38ae"))
self.assertEqual(header.rest_length, 0)
self.assertEqual(buf.tell(), 125)
# check integrity
self.assertEqual(
get_retry_integrity_tag(buf.data_slice(0, 109),
original_destination_cid,
version=header.version),
header.integrity_tag,
)
# serialize
encoded = encode_quic_retry(
version=header.version,
source_cid=header.source_cid,
destination_cid=header.destination_cid,
original_destination_cid=original_destination_cid,
retry_token=header.token,
)
self.assertEqual(encoded, data)
def datagram_received(self, data: Union[bytes, Text],
addr: NetworkAddress) -> None:
data = cast(bytes, data)
buf = Buffer(data=data)
# logger.info("datagram received")
global totalDatagrams
totalDatagrams += 1
# logger.info('total:{} {}'.format(totalDatagrams, addr))
try:
header = pull_quic_header(
buf, host_cid_length=self._configuration.connection_id_length)
except ValueError:
return
# version negotiation
if (header.version is not None and header.version
not in self._configuration.supported_versions):
self._transport.sendto(
encode_quic_version_negotiation(
source_cid=header.destination_cid,
destination_cid=header.source_cid,
supported_versions=self._configuration.supported_versions,
),
addr,
)
return
protocol = self._protocols.get(header.destination_cid, None)
original_destination_connection_id: Optional[bytes] = None
retry_source_connection_id: Optional[bytes] = None
if (protocol is None and len(data) >= 1200
and header.packet_type == PACKET_TYPE_INITIAL):
#retry
if self._retry is not None:
if not header.token:
# create a retry token
source_cid = os.urandom(8)
self._transport.sendto(
encode_quic_retry(
version=header.version,
source_cid=source_cid,
destination_cid=header.source_cid,
original_destination_cid=header.destination_cid,
retry_token=self._retry.create_token(
addr, header.destination_cid, source_cid),
),
addr,
)
return
else:
# validate retry token
try:
(original_destination_cid, retry_source_connection_id
) = self._retry.validate_token(addr, header.token)
except ValueError:
return
else:
original_destination_connection_id = header.destination_cid
# create new connection
connection = QuicConnection(
configuration=self._configuration,
original_destination_connection_id=
original_destination_connection_id,
retry_source_connection_id=retry_source_connection_id,
session_ticket_handler=self._session_ticket_handler,
session_ticket_fetcher=self._session_ticket_fetcher,
)
# initiate the QuicSocketFactory class with the below call.
protocol = self._create_protocol(
connection, stream_handler=self._stream_handler)
protocol.connection_made(self._transport)
# register callbacks
protocol._connection_id_issued_handler = partial(
self._connection_id_issued, protocol=protocol)
protocol._connection_id_retired_handler = partial(
self._connection_id_retired, protocol=protocol)
protocol._connection_terminated_handler = partial(
self._connection_terminated, protocol=protocol)
self._protocols[header.destination_cid] = protocol
self._protocols[connection.host_cid] = protocol
if protocol is not None:
protocol.datagram_received(data, addr)