1// Copyright (C) 2021 The Android Open Source Project 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14syntax = "proto3"; 15 16option java_multiple_files = true; 17option java_package = "com.android.emulation.bluetooth"; 18option csharp_namespace = "Android.Emulation.Bluetooth"; 19option objc_class_prefix = "AEB"; 20option cc_enable_arenas = true; 21 22package android.emulation.bluetooth; 23 24// A packet that is exchanged between the bluetooth chip and higher layers. 25message HCIPacket { 26 enum PacketType { 27 // The packet is unspecified, and contains raw bytes. 28 // This is mainly here to protect against compatibility issues that can 29 // arise if new enum fields are ever introduced. 30 // See: https://developers.google.com/protocol-buffers/docs/style#enums 31 PACKET_TYPE_UNSPECIFIED = 0; 32 33 // HCI Command Packets: commands are issued by the HCI Driver to the 34 // Host Controller: 35 PACKET_TYPE_HCI_COMMAND = 1; 36 37 // ACL (asynchronous connectionless) packet. 38 PACKET_TYPE_ACL = 2; 39 40 // SCO (synchronous connection orientated) packet. 41 PACKET_TYPE_SCO = 3; 42 43 // HCI Event Packets. 44 PACKET_TYPE_EVENT = 4; 45 46 // Isochronous Channel, a data transmissions that are time-sensitive 47 // and synchronized rendering of these data streams across multiple 48 // receivers. See 49 // https://www.novelbits.io/bluetooth-version-5-2-le-audio/ for an 50 // overview of ISO channels. 51 PACKET_TYPE_ISO = 5; 52 } 53 54 // Indicates the type of packet contained in the packet bytes. 55 PacketType type = 1; 56 57 // The actual data that was transferred. 58 bytes packet = 2; 59} 60