Refactor frame helper to allow sending multiple packets at once (#640)

aioesphomeapi/_frame_helper/base.pxd

@@ -26,3 +26,5 @@ cdef class APIFrameHelper:
 
     @cython.locals(end_of_frame_pos=cython.uint)
     cdef _remove_from_buffer(self)
+
+    cpdef write_packets(self, list packets)

aioesphomeapi/_frame_helper/base.py

@@ -127,8 +127,11 @@ class APIFrameHelper:
             handshake_handle.cancel()
 
     @abstractmethod
-    def write_packet(self, type_: int, data: bytes) -> None:
-        """Write a packet to the socket."""
+    def write_packets(self, packets: list[tuple[int, bytes]]) -> None:
+        """Write a packets to the socket.
+
+        Packets are in the format of tuple[protobuf_type, protobuf_data]
+        """
 
     def connection_made(self, transport: asyncio.BaseTransport) -> None:
         """Handle a new connection."""

aioesphomeapi/_frame_helper/noise.pxd

@@ -32,7 +32,11 @@ cdef class APINoiseFrameHelper(APIFrameHelper):
     cpdef _handle_frame(self, bytes data)
 
     @cython.locals(
+        type_="unsigned int",
+        data=bytes,
+        packet=tuple,
         data_len=cython.uint,
+        frame=bytes,
         frame_len=cython.uint
     )
-    cpdef write_packet(self, cython.uint type_, bytes data)
+    cpdef write_packets(self, list packets)

aioesphomeapi/_frame_helper/noise.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-import base64
+import binascii
 import logging
 from enum import Enum
 from functools import partial
@@ -241,16 +241,16 @@ class APINoiseFrameHelper(APIFrameHelper):
         psk = self._noise_psk
         server_name = self._server_name
         try:
-            psk_bytes = base64.b64decode(psk)
+            psk_bytes = binascii.a2b_base64(psk)
         except ValueError:
             raise InvalidEncryptionKeyAPIError(
-                f"{self._log_name}: Malformed PSK {psk}, expected "
+                f"{self._log_name}: Malformed PSK `{psk}`, expected "
                 "base64-encoded value",
                 server_name,
             )
         if len(psk_bytes) != 32:
             raise InvalidEncryptionKeyAPIError(
-                f"{self._log_name}:Malformed PSK {psk}, expected"
+                f"{self._log_name}:Malformed PSK `{psk}`, expected"
                 f" 32-bytes of base64 data",
                 server_name,
             )
@@ -304,8 +304,11 @@ class APINoiseFrameHelper(APIFrameHelper):
         )
         self._ready_future.set_result(None)
 
-    def write_packet(self, type_: int_, data: bytes) -> None:
-        """Write a packet to the socket."""
+    def write_packets(self, packets: list[tuple[int, bytes]]) -> None:
+        """Write a packets to the socket.
+
+        Packets are in the format of tuple[protobuf_type, protobuf_data]
+        """
         if not self._is_ready:
             raise HandshakeAPIError(f"{self._log_name}: Noise connection is not ready")
 
@@ -313,19 +316,32 @@ class APINoiseFrameHelper(APIFrameHelper):
             assert self._encrypt is not None, "Handshake should be complete"
             assert self._writer is not None, "Writer is not set"
 
-        data_len = len(data)
-        data_header = bytes(
-            ((type_ >> 8) & 0xFF, type_ & 0xFF, (data_len >> 8) & 0xFF, data_len & 0xFF)
-        )
-        frame = self._encrypt(data_header + data)
+        out: list[bytes] = []
+        debug_enabled = self._debug_enabled()
+        for packet in packets:
+            type_: int = packet[0]
+            data: bytes = packet[1]
+            data_len = len(data)
+            data_header = bytes(
+                (
+                    (type_ >> 8) & 0xFF,
+                    type_ & 0xFF,
+                    (data_len >> 8) & 0xFF,
+                    data_len & 0xFF,
+                )
+            )
+            frame = self._encrypt(data_header + data)
 
-        if self._debug_enabled():
-            _LOGGER.debug("%s: Sending frame: [%s]", self._log_name, frame.hex())
+            if debug_enabled is True:
+                _LOGGER.debug("%s: Sending frame: [%s]", self._log_name, frame.hex())
+
+            frame_len = len(frame)
+            header = bytes((0x01, (frame_len >> 8) & 0xFF, frame_len & 0xFF))
+            out.append(header)
+            out.append(frame)
 
-        frame_len = len(frame)
-        header = bytes((0x01, (frame_len >> 8) & 0xFF, frame_len & 0xFF))
         try:
-            self._writer(header + frame)
+            self._writer(b"".join(out))
         except WRITE_EXCEPTIONS as err:
             raise SocketAPIError(
                 f"{self._log_name}: Error while writing data: {err}"

aioesphomeapi/_frame_helper/plain_text.pxd

@@ -28,3 +28,10 @@ cdef class APIPlaintextFrameHelper(APIFrameHelper):
     cpdef data_received(self, bytes data)
 
     cpdef _error_on_incorrect_preamble(self, object preamble)
+
+    @cython.locals(
+        type_="unsigned int",
+        data=bytes,
+        packet=tuple
+    )
+    cpdef write_packets(self, list packets)

aioesphomeapi/_frame_helper/plain_text.py

@@ -59,20 +59,32 @@ class APIPlaintextFrameHelper(APIFrameHelper):
         super().connection_made(transport)
         self._ready_future.set_result(None)
 
-    def write_packet(self, type_: int, data: bytes) -> None:
-        """Write a packet to the socket.
+    def write_packets(self, packets: list[tuple[int, bytes]]) -> None:
+        """Write a packets to the socket.
+
+        Packets are in the format of tuple[protobuf_type, protobuf_data]
 
         The entire packet must be written in a single call.
         """
         if TYPE_CHECKING:
             assert self._writer is not None, "Writer should be set"
 
-        data = b"\0" + varuint_to_bytes(len(data)) + varuint_to_bytes(type_) + data
-        if self._debug_enabled():
-            _LOGGER.debug("%s: Sending plaintext frame %s", self._log_name, data.hex())
+        out: list[bytes] = []
+        debug_enabled = self._debug_enabled()
+        for packet in packets:
+            type_: int = packet[0]
+            data: bytes = packet[1]
+            out.append(b"\0")
+            out.append(varuint_to_bytes(len(data)))
+            out.append(varuint_to_bytes(type_))
+            out.append(data)
+            if debug_enabled is True:
+                _LOGGER.debug(
+                    "%s: Sending plaintext frame %s", self._log_name, data.hex()
+                )
 
         try:
-            self._writer(data)
+            self._writer(b"".join(out))
         except WRITE_EXCEPTIONS as err:
             raise SocketAPIError(
                 f"{self._log_name}: Error while writing data: {err}"

aioesphomeapi/connection.pxd

@@ -1,5 +1,7 @@
 import cython
 
+from ._frame_helper.base cimport APIFrameHelper
+
 
 cdef dict MESSAGE_TYPE_TO_PROTO
 cdef dict PROTO_TO_MESSAGE_TYPE
@@ -47,7 +49,7 @@ cdef class APIConnection:
     cdef public object on_stop
     cdef object _on_stop_task
     cdef public object _socket
-    cdef public object _frame_helper
+    cdef public APIFrameHelper _frame_helper
     cdef public object api_version
     cdef public object connection_state
     cdef dict _message_handlers
@@ -69,6 +71,8 @@ cdef class APIConnection:
 
     cpdef send_message(self, object msg)
 
+    cdef send_messages(self, tuple messages)
+
     @cython.locals(handlers=set, handlers_copy=set)
     cpdef _process_packet(self, object msg_type_proto, object data)
 
@@ -89,5 +93,3 @@ cdef class APIConnection:
 
     @cython.locals(handlers=set)
     cpdef _remove_message_callback(self, object on_message, tuple msg_types)
-
-    cdef _send_messages(self, tuple messages)

aioesphomeapi/connection.py

@@ -613,17 +613,11 @@ class APIConnection:
             connect.password = self._params.password
         return connect
 
-    def _send_messages(self, messages: tuple[message.Message, ...]) -> None:
-        """Send a message to the remote.
-
-        Currently this is a wrapper around send_message
-        but may be changed in the future to batch messages
-        together.
-        """
-        for msg in messages:
-            self.send_message(msg)
-
     def send_message(self, msg: message.Message) -> None:
+        """Send a message to the remote."""
+        self.send_messages((msg,))
+
+    def send_messages(self, msgs: tuple[message.Message, ...]) -> None:
         """Send a protobuf message to the remote."""
         if not self._handshake_complete:
             if in_do_connect.get(False):
@@ -635,23 +629,30 @@ class APIConnection:
                 f"Connection isn't established yet ({self.connection_state})"
             )
 
-        msg_type = type(msg)
-        if (message_type := PROTO_TO_MESSAGE_TYPE.get(msg_type)) is None:
-            raise ValueError(f"Message type id not found for type {msg_type}")
+        packets: list[tuple[int, bytes]] = []
+        debug_enabled = self._debug_enabled()
 
-        if self._debug_enabled() is True:
-            _LOGGER.debug("%s: Sending %s: %s", self.log_name, msg_type.__name__, msg)
+        for msg in msgs:
+            msg_type = type(msg)
+            if (message_type := PROTO_TO_MESSAGE_TYPE.get(msg_type)) is None:
+                raise ValueError(f"Message type id not found for type {msg_type}")
+
+            if debug_enabled is True:
+                _LOGGER.debug(
+                    "%s: Sending %s: %s", self.log_name, msg_type.__name__, msg
+                )
+
+            packets.append((message_type, msg.SerializeToString()))
 
         if TYPE_CHECKING:
             assert self._frame_helper is not None
 
-        encoded = msg.SerializeToString()
         try:
-            self._frame_helper.write_packet(message_type, encoded)
+            self._frame_helper.write_packets(packets)
         except SocketAPIError as err:
             # If writing packet fails, we don't know what state the frames
             # are in anymore and we have to close the connection
-            _LOGGER.info("%s: Error writing packet: %s", self.log_name, err)
+            _LOGGER.info("%s: Error writing packets: %s", self.log_name, err)
             self._report_fatal_error(err)
             raise
 
@@ -738,7 +739,7 @@ class APIConnection:
         # Send the message right away to reduce latency.
         # This is safe because we are not awaiting between
         # sending the message and registering the handler
-        self._send_messages(messages)
+        self.send_messages(messages)
         loop = self._loop
         # Unsafe to await between sending the message and registering the handler
         fut: asyncio.Future[None] = loop.create_future()

tests/test__frame_helper.py

@@ -475,7 +475,7 @@ async def test_noise_frame_helper_handshake_success_with_single_packet():
     assert not writes
 
     await handshake_task
-    helper.write_packet(1, b"to device")
+    helper.write_packets([(1, b"to device")])
     encrypted_packet = writes.pop()
     header = encrypted_packet[0:1]
     assert header == b"\x01"