1 // 2 // Copyright 2015 The Android Open Source Project 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 #pragma once 18 19 #include <cstdint> 20 #include <memory> 21 #include <vector> 22 23 #include "command_packet.h" 24 #include "event_packet.h" 25 #include "packet.h" 26 27 namespace test_vendor_lib { 28 29 // Provides abstractions for IO with Packet objects. Used to receive commands 30 // and data from the HCI and to send controller events back to the host. 31 class PacketStream { 32 public: 33 PacketStream() = default; 34 35 virtual ~PacketStream() = default; 36 37 // Reads a command packet from the file descriptor at |fd| and returns the 38 // packet back to the caller, along with the responsibility of managing the 39 // packet. 40 std::unique_ptr<CommandPacket> ReceiveCommand(int fd) const; 41 42 // Reads a single octet from |fd| and interprets it as a packet type octet. 43 // Validates the type octet for correctness. 44 serial_data_type_t ReceivePacketType(int fd) const; 45 46 // Sends an event to file descriptor |fd|. The ownership of the event is left 47 // with the caller. 48 bool SendEvent(std::unique_ptr<EventPacket> event, int fd) const; 49 50 private: 51 // Checks if |type| is in the valid range from DATA_TYPE_COMMAND to 52 // DATA_TYPE_SCO. 53 bool ValidateTypeOctet(serial_data_type_t type) const; 54 55 // Attempts to receive |num_octets_to_receive| into |destination| from |fd|, 56 // returning false if an error occurs. 57 bool ReceiveAll(std::vector<uint8_t>& destination, 58 size_t num_octets_to_receive, int fd) const; 59 60 // Attempts to send |num_octets_to_send| from |source| to |fd|, returning 61 // false if an error occurs. 62 bool SendAll(const std::vector<uint8_t>& source, size_t num_octets_to_send, 63 int fd) const; 64 }; 65 66 } // namespace test_vendor_lib 67
