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test_packet.py
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test_packet.py
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import binascii
from unittest import TestCase
from aioquic.buffer import Buffer, BufferReadError
from aioquic.quic import packet
from aioquic.quic.packet import (
PACKET_TYPE_INITIAL,
PACKET_TYPE_RETRY,
QuicPreferredAddress,
QuicProtocolVersion,
QuicTransportParameters,
decode_packet_number,
encode_quic_retry,
encode_quic_version_negotiation,
get_retry_integrity_tag,
pull_quic_header,
pull_quic_preferred_address,
pull_quic_transport_parameters,
push_quic_preferred_address,
push_quic_transport_parameters,
)
from .utils import load
class PacketTest(TestCase):
def test_decode_packet_number(self):
# expected = 0
for i in range(0, 256):
self.assertEqual(decode_packet_number(i, 8, expected=0), i)
# expected = 128
self.assertEqual(decode_packet_number(0, 8, expected=128), 256)
for i in range(1, 256):
self.assertEqual(decode_packet_number(i, 8, expected=128), i)
# expected = 129
self.assertEqual(decode_packet_number(0, 8, expected=129), 256)
self.assertEqual(decode_packet_number(1, 8, expected=129), 257)
for i in range(2, 256):
self.assertEqual(decode_packet_number(i, 8, expected=129), i)
# expected = 256
for i in range(0, 128):
self.assertEqual(decode_packet_number(i, 8, expected=256), 256 + i)
for i in range(129, 256):
self.assertEqual(decode_packet_number(i, 8, expected=256), i)
def test_pull_empty(self):
buf = Buffer(data=b"")
with self.assertRaises(BufferReadError):
pull_quic_header(buf, host_cid_length=8)
def test_pull_initial_client(self):
buf = Buffer(data=load("initial_client.bin"))
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_INITIAL)
self.assertEqual(header.destination_cid, binascii.unhexlify("858b39368b8e3c6e"))
self.assertEqual(header.source_cid, b"")
self.assertEqual(header.token, b"")
self.assertEqual(header.integrity_tag, b"")
self.assertEqual(header.rest_length, 1262)
self.assertEqual(buf.tell(), 18)
def test_pull_initial_client_truncated(self):
buf = Buffer(data=load("initial_client.bin")[0:100])
with self.assertRaises(ValueError) as cm:
pull_quic_header(buf, host_cid_length=8)
self.assertEqual(str(cm.exception), "Packet payload is truncated")
def test_pull_initial_server(self):
buf = Buffer(data=load("initial_server.bin"))
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_INITIAL)
self.assertEqual(header.destination_cid, b"")
self.assertEqual(header.source_cid, binascii.unhexlify("195c68344e28d479"))
self.assertEqual(header.token, b"")
self.assertEqual(header.integrity_tag, b"")
self.assertEqual(header.rest_length, 184)
self.assertEqual(buf.tell(), 18)
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_29(self):
original_destination_cid = binascii.unhexlify("fbbd219b7363b64b")
data = load("retry_draft_29.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_29)
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("e65b170337b611270f10f4e633b6f51b")
)
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 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_long_header_dcid_too_long(self):
buf = Buffer(
data=binascii.unhexlify(
"c6ff0000161500000000000000000000000000000000000000000000004"
"01c514f99ec4bbf1f7a30f9b0c94fef717f1c1d07fec24c99a864da7ede"
)
)
with self.assertRaises(ValueError) as cm:
pull_quic_header(buf, host_cid_length=8)
self.assertEqual(str(cm.exception), "Destination CID is too long (21 bytes)")
def test_pull_long_header_scid_too_long(self):
buf = Buffer(
data=binascii.unhexlify(
"c2ff0000160015000000000000000000000000000000000000000000004"
"01cfcee99ec4bbf1f7a30f9b0c9417b8c263cdd8cc972a4439d68a46320"
)
)
with self.assertRaises(ValueError) as cm:
pull_quic_header(buf, host_cid_length=8)
self.assertEqual(str(cm.exception), "Source CID is too long (21 bytes)")
def test_pull_long_header_no_fixed_bit(self):
buf = Buffer(data=b"\x80\xff\x00\x00\x11\x00\x00")
with self.assertRaises(ValueError) as cm:
pull_quic_header(buf, host_cid_length=8)
self.assertEqual(str(cm.exception), "Packet fixed bit is zero")
def test_pull_long_header_too_short(self):
buf = Buffer(data=b"\xc0\x00")
with self.assertRaises(BufferReadError):
pull_quic_header(buf, host_cid_length=8)
def test_pull_short_header(self):
buf = Buffer(data=load("short_header.bin"))
header = pull_quic_header(buf, host_cid_length=8)
self.assertFalse(header.is_long_header)
self.assertEqual(header.version, None)
self.assertEqual(header.packet_type, 0x50)
self.assertEqual(header.destination_cid, binascii.unhexlify("f45aa7b59c0e1ad6"))
self.assertEqual(header.source_cid, b"")
self.assertEqual(header.token, b"")
self.assertEqual(header.integrity_tag, b"")
self.assertEqual(header.rest_length, 12)
self.assertEqual(buf.tell(), 9)
def test_pull_short_header_no_fixed_bit(self):
buf = Buffer(data=b"\x00")
with self.assertRaises(ValueError) as cm:
pull_quic_header(buf, host_cid_length=8)
self.assertEqual(str(cm.exception), "Packet fixed bit is zero")
def test_encode_quic_version_negotiation(self):
data = encode_quic_version_negotiation(
destination_cid=binascii.unhexlify("9aac5a49ba87a849"),
source_cid=binascii.unhexlify("f92f4336fa951ba1"),
supported_versions=[0x45474716, QuicProtocolVersion.VERSION_1],
)
self.assertEqual(data[1:], load("version_negotiation.bin")[1:])
class ParamsTest(TestCase):
maxDiff = None
def test_params(self):
data = binascii.unhexlify(
"010267100210cc2fd6e7d97a53ab5be85b28d75c8008030247e404048005fff"
"a05048000ffff06048000ffff0801060a01030b0119"
)
# parse
buf = Buffer(data=data)
params = pull_quic_transport_parameters(buf)
self.assertEqual(
params,
QuicTransportParameters(
max_idle_timeout=10000,
stateless_reset_token=b"\xcc/\xd6\xe7\xd9zS\xab[\xe8[(\xd7\\\x80\x08",
max_udp_payload_size=2020,
initial_max_data=393210,
initial_max_stream_data_bidi_local=65535,
initial_max_stream_data_bidi_remote=65535,
initial_max_stream_data_uni=None,
initial_max_streams_bidi=6,
initial_max_streams_uni=None,
ack_delay_exponent=3,
max_ack_delay=25,
),
)
# serialize
buf = Buffer(capacity=len(data))
push_quic_transport_parameters(buf, params)
self.assertEqual(len(buf.data), len(data))
def test_params_disable_active_migration(self):
data = binascii.unhexlify("0c00")
# parse
buf = Buffer(data=data)
params = pull_quic_transport_parameters(buf)
self.assertEqual(params, QuicTransportParameters(disable_active_migration=True))
# serialize
buf = Buffer(capacity=len(data))
push_quic_transport_parameters(buf, params)
self.assertEqual(buf.data, data)
def test_params_preferred_address(self):
data = binascii.unhexlify(
"0d3b8ba27b8611532400890200000000f03c91fffe69a45411531262c4518d6"
"3013f0c287ed3573efa9095603746b2e02d45480ba6643e5c6e7d48ecb4"
)
# parse
buf = Buffer(data=data)
params = pull_quic_transport_parameters(buf)
self.assertEqual(
params,
QuicTransportParameters(
preferred_address=QuicPreferredAddress(
ipv4_address=("139.162.123.134", 4435),
ipv6_address=("2400:8902::f03c:91ff:fe69:a454", 4435),
connection_id=b"b\xc4Q\x8dc\x01?\x0c(~\xd3W>\xfa\x90\x95`7",
stateless_reset_token=b"F\xb2\xe0-EH\x0b\xa6d>\\n}H\xec\xb4",
),
),
)
# serialize
buf = Buffer(capacity=1000)
push_quic_transport_parameters(buf, params)
self.assertEqual(buf.data, data)
def test_params_unknown(self):
data = binascii.unhexlify("8000ff000100")
# parse
buf = Buffer(data=data)
params = pull_quic_transport_parameters(buf)
self.assertEqual(params, QuicTransportParameters())
def test_preferred_address_ipv4_only(self):
data = binascii.unhexlify(
"8ba27b8611530000000000000000000000000000000000001262c4518d63013"
"f0c287ed3573efa9095603746b2e02d45480ba6643e5c6e7d48ecb4"
)
# parse
buf = Buffer(data=data)
preferred_address = pull_quic_preferred_address(buf)
self.assertEqual(
preferred_address,
QuicPreferredAddress(
ipv4_address=("139.162.123.134", 4435),
ipv6_address=None,
connection_id=b"b\xc4Q\x8dc\x01?\x0c(~\xd3W>\xfa\x90\x95`7",
stateless_reset_token=b"F\xb2\xe0-EH\x0b\xa6d>\\n}H\xec\xb4",
),
)
# serialize
buf = Buffer(capacity=len(data))
push_quic_preferred_address(buf, preferred_address)
self.assertEqual(buf.data, data)
def test_preferred_address_ipv6_only(self):
data = binascii.unhexlify(
"0000000000002400890200000000f03c91fffe69a45411531262c4518d63013"
"f0c287ed3573efa9095603746b2e02d45480ba6643e5c6e7d48ecb4"
)
# parse
buf = Buffer(data=data)
preferred_address = pull_quic_preferred_address(buf)
self.assertEqual(
preferred_address,
QuicPreferredAddress(
ipv4_address=None,
ipv6_address=("2400:8902::f03c:91ff:fe69:a454", 4435),
connection_id=b"b\xc4Q\x8dc\x01?\x0c(~\xd3W>\xfa\x90\x95`7",
stateless_reset_token=b"F\xb2\xe0-EH\x0b\xa6d>\\n}H\xec\xb4",
),
)
# serialize
buf = Buffer(capacity=len(data))
push_quic_preferred_address(buf, preferred_address)
self.assertEqual(buf.data, data)
class FrameTest(TestCase):
def test_ack_frame(self):
data = b"\x00\x02\x00\x00"
# parse
buf = Buffer(data=data)
rangeset, delay = packet.pull_ack_frame(buf)
self.assertEqual(list(rangeset), [range(0, 1)])
self.assertEqual(delay, 2)
# serialize
buf = Buffer(capacity=len(data))
packet.push_ack_frame(buf, rangeset, delay)
self.assertEqual(buf.data, data)
def test_ack_frame_with_one_range(self):
data = b"\x02\x02\x01\x00\x00\x00"
# parse
buf = Buffer(data=data)
rangeset, delay = packet.pull_ack_frame(buf)
self.assertEqual(list(rangeset), [range(0, 1), range(2, 3)])
self.assertEqual(delay, 2)
# serialize
buf = Buffer(capacity=len(data))
packet.push_ack_frame(buf, rangeset, delay)
self.assertEqual(buf.data, data)
def test_ack_frame_with_one_range_2(self):
data = b"\x05\x02\x01\x00\x00\x03"
# parse
buf = Buffer(data=data)
rangeset, delay = packet.pull_ack_frame(buf)
self.assertEqual(list(rangeset), [range(0, 4), range(5, 6)])
self.assertEqual(delay, 2)
# serialize
buf = Buffer(capacity=len(data))
packet.push_ack_frame(buf, rangeset, delay)
self.assertEqual(buf.data, data)
def test_ack_frame_with_one_range_3(self):
data = b"\x05\x02\x01\x00\x01\x02"
# parse
buf = Buffer(data=data)
rangeset, delay = packet.pull_ack_frame(buf)
self.assertEqual(list(rangeset), [range(0, 3), range(5, 6)])
self.assertEqual(delay, 2)
# serialize
buf = Buffer(capacity=len(data))
packet.push_ack_frame(buf, rangeset, delay)
self.assertEqual(buf.data, data)
def test_ack_frame_with_two_ranges(self):
data = b"\x04\x02\x02\x00\x00\x00\x00\x00"
# parse
buf = Buffer(data=data)
rangeset, delay = packet.pull_ack_frame(buf)
self.assertEqual(list(rangeset), [range(0, 1), range(2, 3), range(4, 5)])
self.assertEqual(delay, 2)
# serialize
buf = Buffer(capacity=len(data))
packet.push_ack_frame(buf, rangeset, delay)
self.assertEqual(buf.data, data)