pandora: import bumble pandora server from avatar

bumble/pandora/utils.py

@@ -0,0 +1,112 @@
+# Copyright 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 contextlib
+import functools
+import grpc
+import inspect
+import logging
+
+from bumble.device import Device
+from bumble.hci import Address
+from google.protobuf.message import Message  # pytype: disable=pyi-error
+from typing import Any, Dict, Generator, MutableMapping, Optional, Tuple
+
+ADDRESS_TYPES: Dict[str, int] = {
+    "public": Address.PUBLIC_DEVICE_ADDRESS,
+    "random": Address.RANDOM_DEVICE_ADDRESS,
+    "public_identity": Address.PUBLIC_IDENTITY_ADDRESS,
+    "random_static_identity": Address.RANDOM_IDENTITY_ADDRESS,
+}
+
+
+def address_from_request(request: Message, field: Optional[str]) -> Address:
+    if field is None:
+        return Address.ANY
+    return Address(bytes(reversed(getattr(request, field))), ADDRESS_TYPES[field])
+
+
+class BumbleServerLoggerAdapter(logging.LoggerAdapter):  # type: ignore
+    """Formats logs from the PandoraClient."""
+
+    def process(
+        self, msg: str, kwargs: MutableMapping[str, Any]
+    ) -> Tuple[str, MutableMapping[str, Any]]:
+        assert self.extra
+        service_name = self.extra['service_name']
+        assert isinstance(service_name, str)
+        device = self.extra['device']
+        assert isinstance(device, Device)
+        addr_bytes = bytes(
+            reversed(bytes(device.public_address))
+        )  # pytype: disable=attribute-error
+        addr = ':'.join([f'{x:02X}' for x in addr_bytes[4:]])
+        return (f'[bumble.{service_name}:{addr}] {msg}', kwargs)
+
+
+@contextlib.contextmanager
+def exception_to_rpc_error(
+    context: grpc.ServicerContext,
+) -> Generator[None, None, None]:
+    try:
+        yield None
+    except NotImplementedError as e:
+        context.set_code(grpc.StatusCode.UNIMPLEMENTED)  # type: ignore
+        context.set_details(str(e))  # type: ignore
+    except ValueError as e:
+        context.set_code(grpc.StatusCode.INVALID_ARGUMENT)  # type: ignore
+        context.set_details(str(e))  # type: ignore
+    except RuntimeError as e:
+        context.set_code(grpc.StatusCode.ABORTED)  # type: ignore
+        context.set_details(str(e))  # type: ignore
+
+
+# Decorate an RPC servicer method with a wrapper that transform exceptions to gRPC errors.
+def rpc(func: Any) -> Any:
+    @functools.wraps(func)
+    async def asyncgen_wrapper(
+        self: Any, request: Any, context: grpc.ServicerContext
+    ) -> Any:
+        with exception_to_rpc_error(context):
+            async for v in func(self, request, context):
+                yield v
+
+    @functools.wraps(func)
+    async def async_wrapper(
+        self: Any, request: Any, context: grpc.ServicerContext
+    ) -> Any:
+        with exception_to_rpc_error(context):
+            return await func(self, request, context)
+
+    @functools.wraps(func)
+    def gen_wrapper(self: Any, request: Any, context: grpc.ServicerContext) -> Any:
+        with exception_to_rpc_error(context):
+            for v in func(self, request, context):
+                yield v
+
+    @functools.wraps(func)
+    def wrapper(self: Any, request: Any, context: grpc.ServicerContext) -> Any:
+        with exception_to_rpc_error(context):
+            return func(self, request, context)
+
+    if inspect.isasyncgenfunction(func):
+        return asyncgen_wrapper
+
+    if inspect.iscoroutinefunction(func):
+        return async_wrapper
+
+    if inspect.isgenerator(func):
+        return gen_wrapper
+
+    return wrapper