110 lines
3.9 KiB
Python
110 lines
3.9 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 logging
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import asyncio
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import os
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import sys
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from bumble import hci, transport
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from bumble.bridge import HCI_Bridge
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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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# Main
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# -----------------------------------------------------------------------------
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async def async_main():
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if len(sys.argv) < 3:
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print(
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'Usage: hci_bridge.py <host-transport-spec> <controller-transport-spec> '
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'[command-short-circuit-list]'
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)
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print(
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'example: python hci_bridge.py udp:0.0.0.0:9000,127.0.0.1:9001 '
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'serial:/dev/tty.usbmodem0006839912171,1000000 '
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'0x3f:0x0070,0x3f:0x0074,0x3f:0x0077,0x3f:0x0078'
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)
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return
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print('>>> connecting to HCI...')
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async with await transport.open_transport_or_link(sys.argv[1]) as (
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hci_host_source,
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hci_host_sink,
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):
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print('>>> connected')
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print('>>> connecting to HCI...')
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async with await transport.open_transport_or_link(sys.argv[2]) as (
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hci_controller_source,
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hci_controller_sink,
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):
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print('>>> connected')
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command_short_circuits = []
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if len(sys.argv) >= 4:
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for op_code_str in sys.argv[3].split(','):
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if ':' in op_code_str:
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ogf, ocf = op_code_str.split(':')
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command_short_circuits.append(
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hci.hci_command_op_code(int(ogf, 16), int(ocf, 16))
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)
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else:
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command_short_circuits.append(int(op_code_str, 16))
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def host_to_controller_filter(hci_packet):
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if (
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hci_packet.hci_packet_type == hci.HCI_COMMAND_PACKET
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and hci_packet.op_code in command_short_circuits
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):
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# Respond with a success response
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logger.debug('short-circuiting packet')
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response = hci.HCI_Command_Complete_Event(
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num_hci_command_packets=1,
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command_opcode=hci_packet.op_code,
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return_parameters=bytes([hci.HCI_SUCCESS]),
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)
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# Return a packet with 'respond to sender' set to True
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return (response.to_bytes(), True)
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return None
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_ = HCI_Bridge(
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hci_host_source,
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hci_host_sink,
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hci_controller_source,
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hci_controller_sink,
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host_to_controller_filter,
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None,
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)
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await asyncio.get_running_loop().create_future()
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# -----------------------------------------------------------------------------
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def main():
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logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'INFO').upper())
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asyncio.run(async_main())
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# -----------------------------------------------------------------------------
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if __name__ == '__main__':
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main()
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