| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SRC_CONNECTIVITY_BLUETOOTH_CORE_BT_HOST_SM_PACKET_H_ |
| #define SRC_CONNECTIVITY_BLUETOOTH_CORE_BT_HOST_SM_PACKET_H_ |
| |
| #include <lib/fitx/result.h> |
| |
| #include "src/connectivity/bluetooth/core/bt-host/common/byte_buffer.h" |
| #include "src/connectivity/bluetooth/core/bt-host/common/packet_view.h" |
| #include "src/connectivity/bluetooth/core/bt-host/sm/smp.h" |
| |
| namespace bt::sm { |
| |
| // Utilities for processing SMP packets. |
| // TODO(fxbug.dev/48978): Merge PacketReader & ValidPacketReader types into one type for validating |
| // & accessing SM packets once PacketReader is no longer used. |
| class PacketReader : public PacketView<Header> { |
| public: |
| explicit PacketReader(const ByteBuffer* buffer); |
| inline Code code() const { return header().code; } |
| }; |
| |
| // A type which has been verified to satisfy all the preconditions of a valid SMP packet. Namely, |
| // 1.) The packet's length is at least that of an SMP header. |
| // 2.) The packet's header code is a valid SMP code that our stack supports. |
| // 3.) The length of the packet's payload matches the payload associated with its header code. |
| class ValidPacketReader : public PacketReader { |
| public: |
| // Convert a ByteBufferPtr to a ValidPacketReader if possible to allow unchecked access to |
| // its payload, or an error explaining why we could not. |
| static fitx::result<ErrorCode, ValidPacketReader> ParseSdu(const ByteBufferPtr& sdu); |
| |
| private: |
| // Private constructor because a valid PacketReader must be parsed from a ByteBufferPtr |
| explicit ValidPacketReader(const ByteBuffer* buffer); |
| }; |
| |
| class PacketWriter : public MutablePacketView<Header> { |
| public: |
| // Constructor writes |code| into |buffer|. |
| PacketWriter(Code code, MutableByteBuffer* buffer); |
| }; |
| |
| } // namespace bt::sm |
| |
| #endif // SRC_CONNECTIVITY_BLUETOOTH_CORE_BT_HOST_SM_PACKET_H_ |