| // Copyright 2022 The Pigweed Authors |
| // |
| // 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. |
| #pragma once |
| |
| #include <cstdint> |
| |
| namespace pw::transfer { |
| |
| enum class ProtocolVersion { |
| // Protocol version not known or not set. |
| kUnknown, |
| |
| // The original transfer protocol, prior to transfer start/end handshakes. |
| kLegacy, |
| |
| // Second version of the transfer protocol. Guarantees type fields on all |
| // chunks, deprecates pending_bytes in favor of window_end_offset, splits |
| // transfer resource IDs from ephemeral session IDs, and adds a handshake |
| // to the start and end of all transfer sessions. |
| kVersionTwo, |
| |
| // Alias to the most up-to-date version of the transfer protocol. |
| kLatest = kVersionTwo, |
| }; |
| |
| constexpr bool ValidProtocolVersion(ProtocolVersion version) { |
| return version > ProtocolVersion::kUnknown && |
| version <= ProtocolVersion::kLatest; |
| } |
| |
| constexpr bool ValidProtocolVersion(uint32_t version) { |
| return ValidProtocolVersion(static_cast<ProtocolVersion>(version)); |
| } |
| |
| } // namespace pw::transfer |
