forked from auracaster/bumble_mirror
358 lines
11 KiB
Python
358 lines
11 KiB
Python
# Copyright 2021-2022 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# -----------------------------------------------------------------------------
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# Imports
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# -----------------------------------------------------------------------------
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import asyncio
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import logging
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import os
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import random
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import pytest
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from bumble import l2cap
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from bumble.core import ProtocolError
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from .test_utils import TwoDevices, async_barrier
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# -----------------------------------------------------------------------------
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# Logging
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# -----------------------------------------------------------------------------
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logger = logging.getLogger(__name__)
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# -----------------------------------------------------------------------------
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# -----------------------------------------------------------------------------
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def test_helpers():
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psm = l2cap.L2CAP_Connection_Request.serialize_psm(0x01)
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assert psm == bytes([0x01, 0x00])
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psm = l2cap.L2CAP_Connection_Request.serialize_psm(0x1023)
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assert psm == bytes([0x23, 0x10])
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psm = l2cap.L2CAP_Connection_Request.serialize_psm(0x242311)
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assert psm == bytes([0x11, 0x23, 0x24])
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(offset, psm) = l2cap.L2CAP_Connection_Request.parse_psm(
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bytes([0x00, 0x01, 0x00, 0x44]), 1
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)
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assert offset == 3
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assert psm == 0x01
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(offset, psm) = l2cap.L2CAP_Connection_Request.parse_psm(
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bytes([0x00, 0x23, 0x10, 0x44]), 1
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)
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assert offset == 3
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assert psm == 0x1023
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(offset, psm) = l2cap.L2CAP_Connection_Request.parse_psm(
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bytes([0x00, 0x11, 0x23, 0x24, 0x44]), 1
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)
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assert offset == 4
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assert psm == 0x242311
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rq = l2cap.L2CAP_Connection_Request(psm=0x01, source_cid=0x44, identifier=0x88)
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brq = bytes(rq)
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srq = l2cap.L2CAP_Connection_Request.from_bytes(brq)
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assert isinstance(srq, l2cap.L2CAP_Connection_Request)
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assert srq.psm == rq.psm
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assert srq.source_cid == rq.source_cid
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assert srq.identifier == rq.identifier
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# -----------------------------------------------------------------------------
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def test_l2cap_credit_based_connection_request() -> None:
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frame = l2cap.L2CAP_Credit_Based_Connection_Request(
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identifier=1, spsm=2, mtu=3, mps=4, initial_credits=5, source_cid=[6, 7, 8]
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)
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parsed = l2cap.L2CAP_Control_Frame.from_bytes(bytes(frame))
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assert parsed == frame
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# -----------------------------------------------------------------------------
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def test_l2cap_credit_based_connection_response() -> None:
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frame = l2cap.L2CAP_Credit_Based_Connection_Response(
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identifier=1,
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mtu=2,
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mps=3,
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initial_credits=4,
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result=l2cap.L2CAP_Credit_Based_Connection_Response.Result.ALL_CONNECTIONS_PENDING_AUTHENTICATION_PENDING,
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destination_cid=[6, 7, 8],
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)
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parsed = l2cap.L2CAP_Control_Frame.from_bytes(bytes(frame))
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assert parsed == frame
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# -----------------------------------------------------------------------------
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def test_l2cap_credit_based_reconfigure_request() -> None:
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frame = l2cap.L2CAP_Credit_Based_Reconfigure_Request(
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identifier=1,
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mtu=2,
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mps=3,
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destination_cid=[6, 7, 8],
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)
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parsed = l2cap.L2CAP_Control_Frame.from_bytes(bytes(frame))
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assert parsed == frame
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# -----------------------------------------------------------------------------
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def test_l2cap_credit_based_reconfigure_response() -> None:
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frame = l2cap.L2CAP_Credit_Based_Reconfigure_Response(
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identifier=1,
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result=l2cap.L2CAP_Credit_Based_Reconfigure_Response.Result.RECONFIGURATION_FAILED_OTHER_UNACCEPTABLE_PARAMETERS,
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)
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parsed = l2cap.L2CAP_Control_Frame.from_bytes(bytes(frame))
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assert parsed == frame
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# -----------------------------------------------------------------------------
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def test_unimplemented_control_frame():
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frame = l2cap.L2CAP_Control_Frame(identifier=1)
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frame.code = 0xFF
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frame.payload = b'123456'
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parsed = l2cap.L2CAP_Control_Frame.from_bytes(bytes(frame))
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assert parsed.code == 0xFF
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assert parsed.payload == b'123456'
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# -----------------------------------------------------------------------------
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@pytest.mark.asyncio
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async def test_basic_connection():
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devices = TwoDevices()
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await devices.setup_connection()
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psm = 1234
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# Check that if there's no one listening, we can't connect
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with pytest.raises(ProtocolError):
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l2cap_channel = await devices.connections[0].create_l2cap_channel(
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spec=l2cap.LeCreditBasedChannelSpec(psm)
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)
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# Now add a listener
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incoming_channel = None
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received = []
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def on_coc(channel):
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nonlocal incoming_channel
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incoming_channel = channel
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def on_data(data):
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received.append(data)
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channel.sink = on_data
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devices.devices[1].create_l2cap_server(
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spec=l2cap.LeCreditBasedChannelSpec(psm=1234), handler=on_coc
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)
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l2cap_channel = await devices.connections[0].create_l2cap_channel(
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spec=l2cap.LeCreditBasedChannelSpec(psm)
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)
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messages = (bytes([1, 2, 3]), bytes([4, 5, 6]), bytes(10000))
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for message in messages:
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l2cap_channel.write(message)
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await asyncio.sleep(0)
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await l2cap_channel.drain()
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# Test closing
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closed = [False, False]
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closed_event = asyncio.Event()
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def on_close(which, event):
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closed[which] = True
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if event:
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event.set()
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l2cap_channel.on('close', lambda: on_close(0, None))
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incoming_channel.on('close', lambda: on_close(1, closed_event))
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await l2cap_channel.disconnect()
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assert closed == [True, True]
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await closed_event.wait()
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sent_bytes = b''.join(messages)
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received_bytes = b''.join(received)
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assert sent_bytes == received_bytes
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# -----------------------------------------------------------------------------
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@pytest.mark.parametrize("info_type,", list(l2cap.L2CAP_Information_Request.InfoType))
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async def test_l2cap_information_request(monkeypatch, info_type):
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# TODO: Replace handlers with API when implemented
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devices = await TwoDevices.create_with_connection()
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# Register handlers
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info_rsp = list[l2cap.L2CAP_Information_Response]()
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def on_l2cap_information_response(connection, cid, frame):
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info_rsp.append(frame)
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assert (connection := devices.connections[0])
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channel_manager = devices[0].l2cap_channel_manager
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monkeypatch.setattr(
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channel_manager,
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'on_l2cap_information_response',
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on_l2cap_information_response,
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raising=False,
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)
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channel_manager.send_control_frame(
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connection,
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l2cap.L2CAP_LE_SIGNALING_CID,
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l2cap.L2CAP_Information_Request(
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identifier=channel_manager.next_identifier(connection),
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info_type=info_type,
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),
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)
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await async_barrier()
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response = info_rsp[0]
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assert response.result == l2cap.L2CAP_Information_Response.Result.SUCCESS
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# -----------------------------------------------------------------------------
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async def transfer_payload(max_credits, mtu, mps):
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devices = TwoDevices()
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await devices.setup_connection()
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received = []
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def on_coc(channel):
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def on_data(data):
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received.append(data)
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channel.sink = on_data
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server = devices.devices[1].create_l2cap_server(
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spec=l2cap.LeCreditBasedChannelSpec(max_credits=max_credits, mtu=mtu, mps=mps),
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handler=on_coc,
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)
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l2cap_channel = await devices.connections[0].create_l2cap_channel(
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spec=l2cap.LeCreditBasedChannelSpec(server.psm)
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)
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messages = [bytes([1, 2, 3, 4, 5, 6, 7]) * x for x in (3, 10, 100, 789)]
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for message in messages:
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l2cap_channel.write(message)
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await asyncio.sleep(0)
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if random.randint(0, 5) == 1:
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await l2cap_channel.drain()
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await l2cap_channel.drain()
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await l2cap_channel.disconnect()
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sent_bytes = b''.join(messages)
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received_bytes = b''.join(received)
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assert sent_bytes == received_bytes
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@pytest.mark.asyncio
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async def test_transfer():
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for max_credits in (1, 10, 100, 10000):
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for mtu in (50, 255, 256, 1000):
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for mps in (50, 255, 256, 1000):
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# print(max_credits, mtu, mps)
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await transfer_payload(max_credits, mtu, mps)
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# -----------------------------------------------------------------------------
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@pytest.mark.asyncio
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async def test_bidirectional_transfer():
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devices = TwoDevices()
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await devices.setup_connection()
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client_received = []
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server_received = []
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server_channel = None
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def on_server_coc(channel):
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nonlocal server_channel
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server_channel = channel
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def on_server_data(data):
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server_received.append(data)
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channel.sink = on_server_data
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def on_client_data(data):
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client_received.append(data)
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server = devices.devices[1].create_l2cap_server(
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spec=l2cap.LeCreditBasedChannelSpec(), handler=on_server_coc
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)
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client_channel = await devices.connections[0].create_l2cap_channel(
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spec=l2cap.LeCreditBasedChannelSpec(server.psm)
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)
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client_channel.sink = on_client_data
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messages = [bytes([1, 2, 3, 4, 5, 6, 7]) * x for x in (3, 10, 100)]
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for message in messages:
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client_channel.write(message)
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await client_channel.drain()
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await asyncio.sleep(0)
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server_channel.write(message)
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await server_channel.drain()
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await client_channel.disconnect()
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message_bytes = b''.join(messages)
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client_received_bytes = b''.join(client_received)
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server_received_bytes = b''.join(server_received)
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assert client_received_bytes == message_bytes
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assert server_received_bytes == message_bytes
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# -----------------------------------------------------------------------------
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@pytest.mark.asyncio
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async def test_mtu():
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devices = TwoDevices()
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await devices.setup_connection()
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def on_channel_open(channel):
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assert channel.peer_mtu == 456
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def on_channel(channel):
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channel.on('open', lambda: on_channel_open(channel))
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server = devices.devices[1].create_l2cap_server(
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spec=l2cap.ClassicChannelSpec(mtu=345), handler=on_channel
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)
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client_channel = await devices.connections[0].create_l2cap_channel(
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spec=l2cap.ClassicChannelSpec(server.psm, mtu=456)
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)
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assert client_channel.peer_mtu == 345
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# -----------------------------------------------------------------------------
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async def run():
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test_helpers()
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await test_basic_connection()
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await test_transfer()
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await test_bidirectional_transfer()
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await test_mtu()
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# -----------------------------------------------------------------------------
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if __name__ == '__main__':
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logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'INFO').upper())
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asyncio.run(run())
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