def _receive_data_on_session_stream(self, data: bytes, fin: bool) -> None:
self._capsule_decoder_for_session_stream.append(data)
if fin:
self._capsule_decoder_for_session_stream.final()
for capsule in self._capsule_decoder_for_session_stream:
if capsule.type in {
CapsuleType.DATAGRAM,
CapsuleType.REGISTER_DATAGRAM_CONTEXT,
CapsuleType.CLOSE_DATAGRAM_CONTEXT
}:
raise ProtocolError(
f"Unimplemented capsule type: {capsule.type}")
if capsule.type in {
CapsuleType.REGISTER_DATAGRAM_NO_CONTEXT,
CapsuleType.CLOSE_WEBTRANSPORT_SESSION
}:
# We'll handle this case below.
pass
else:
# We should ignore unknown capsules.
continue
if self._close_info is not None:
raise ProtocolError(
("Receiving a capsule with type = {} after receiving " +
"CLOSE_WEBTRANSPORT_SESSION").format(capsule.type))
if capsule.type == CapsuleType.REGISTER_DATAGRAM_NO_CONTEXT:
buffer = Buffer(data=capsule.data)
format_type = buffer.pull_uint_var()
# https://ietf-wg-webtrans.github.io/draft-ietf-webtrans-http3/draft-ietf-webtrans-http3.html#name-datagram-format-type
WEBTRANPORT_FORMAT_TYPE = 0xff7c00
if format_type != WEBTRANPORT_FORMAT_TYPE:
raise ProtocolError(
"Unexpected datagram format type: {}".format(
format_type))
self._allow_datagrams = True
elif capsule.type == CapsuleType.CLOSE_WEBTRANSPORT_SESSION:
buffer = Buffer(data=capsule.data)
code = buffer.pull_uint32()
# 4 bytes for the uint32.
reason = buffer.pull_bytes(len(capsule.data) - 4)
# TODO(yutakahirano): Make sure `reason` is a UTF-8 text.
self._close_info = (code, reason)
if fin:
self._call_session_closed(self._close_info, abruptly=False)
def test_pull_version_negotiation(self):
buf = Buffer(data=load("version_negotiation.bin"))
header = pull_quic_header(buf, host_cid_length=8)
self.assertTrue(header.is_long_header)
self.assertEqual(header.version, QuicProtocolVersion.NEGOTIATION)
self.assertEqual(header.packet_type, None)
self.assertEqual(header.destination_cid,
binascii.unhexlify("9aac5a49ba87a849"))
self.assertEqual(header.source_cid,
binascii.unhexlify("f92f4336fa951ba1"))
self.assertEqual(header.token, b"")
self.assertEqual(header.integrity_tag, b"")
self.assertEqual(header.rest_length, 8)
self.assertEqual(buf.tell(), 23)
versions = []
while not buf.eof():
versions.append(buf.pull_uint32())
self.assertEqual(versions,
[0x45474716, QuicProtocolVersion.VERSION_1]),
def test_pull_uint32_truncated(self):
buf = Buffer(capacity=3)
with self.assertRaises(BufferReadError):
buf.pull_uint32()
self.assertEqual(buf.tell(), 0)
def test_pull_uint32(self):
buf = Buffer(data=b"\x08\x07\x06\x05\x04\x03\x02\x01")
self.assertEqual(buf.pull_uint32(), 0x08070605)
self.assertEqual(buf.tell(), 4)
