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# Copyright 2021-2022 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import asyncio
# -----------------------------------------------------------------------------
# Imports
# -----------------------------------------------------------------------------
import logging
import sys
import bumble.logging
from bumble import hci, transport
from bumble.bridge import HCI_Bridge
# -----------------------------------------------------------------------------
# Logging
# -----------------------------------------------------------------------------
logger = logging.getLogger(__name__)
# -----------------------------------------------------------------------------
# Main
# -----------------------------------------------------------------------------
async def async_main():
if len(sys.argv) < 3:
print(
'Usage: hci_bridge.py <host-transport-spec> <controller-transport-spec> '
'[command-short-circuit-list]'
)
print(
'example: python hci_bridge.py udp:0.0.0.0:9000,127.0.0.1:9001 '
'serial:/dev/tty.usbmodem0006839912171,1000000 '
'0x3f:0x0070,0x3f:0x0074,0x3f:0x0077,0x3f:0x0078'
)
return
print('>>> connecting to HCI...')
async with await transport.open_transport(sys.argv[1]) as (
hci_host_source,
hci_host_sink,
):
print('>>> connected')
print('>>> connecting to HCI...')
async with await transport.open_transport(sys.argv[2]) as (
hci_controller_source,
hci_controller_sink,
):
print('>>> connected')
command_short_circuits = []
if len(sys.argv) >= 4:
for op_code_str in sys.argv[3].split(','):
if ':' in op_code_str:
ogf, ocf = op_code_str.split(':')
command_short_circuits.append(
hci.hci_command_op_code(int(ogf, 16), int(ocf, 16))
)
else:
command_short_circuits.append(int(op_code_str, 16))
def host_to_controller_filter(hci_packet):
if (
hci_packet.hci_packet_type == hci.HCI_COMMAND_PACKET
and hci_packet.op_code in command_short_circuits
):
# Respond with a success response
logger.debug('short-circuiting packet')
response = hci.HCI_Command_Complete_Event(
num_hci_command_packets=1,
command_opcode=hci_packet.op_code,
return_parameters=hci.HCI_StatusReturnParameters(
status=hci.HCI_ErrorCode.SUCCESS
),
)
# Return a packet with 'respond to sender' set to True
return (bytes(response), True)
return None
_ = HCI_Bridge(
hci_host_source,
hci_host_sink,
hci_controller_source,
hci_controller_sink,
host_to_controller_filter,
None,
)
await asyncio.get_running_loop().create_future()
# -----------------------------------------------------------------------------
def main():
bumble.logging.setup_basic_logging()
asyncio.run(async_main())
# -----------------------------------------------------------------------------
if __name__ == '__main__':
main()
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