| // Copyright (c) 2016 The Chromium 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 QUICHE_QUIC_CORE_QUIC_VERSION_MANAGER_H_ |
| #define QUICHE_QUIC_CORE_QUIC_VERSION_MANAGER_H_ |
| |
| #include "net/third_party/quiche/src/quic/core/quic_versions.h" |
| #include "net/third_party/quiche/src/quic/platform/api/quic_export.h" |
| |
| namespace quic { |
| |
| // Used to generate filtered supported versions based on flags. |
| class QUIC_EXPORT_PRIVATE QuicVersionManager { |
| public: |
| // |supported_versions| should be sorted in the order of preference (typically |
| // highest supported version to the lowest supported version). |
| explicit QuicVersionManager(ParsedQuicVersionVector supported_versions); |
| virtual ~QuicVersionManager(); |
| |
| // Returns currently supported QUIC versions. |
| // TODO(nharper): Remove this method once it is unused. |
| const QuicTransportVersionVector& GetSupportedTransportVersions(); |
| |
| // Returns currently supported QUIC versions. This vector has the same order |
| // as the versions passed to the constructor. |
| const ParsedQuicVersionVector& GetSupportedVersions(); |
| |
| protected: |
| // If the value of any reloadable flag is different from the cached value, |
| // re-filter |filtered_supported_versions_| and update the cached flag values. |
| // Otherwise, does nothing. |
| void MaybeRefilterSupportedVersions(); |
| |
| // Refilters filtered_supported_versions_. |
| virtual void RefilterSupportedVersions(); |
| |
| const QuicTransportVersionVector& filtered_transport_versions() const { |
| return filtered_transport_versions_; |
| } |
| |
| private: |
| // Cached value of reloadable flags. |
| // quic_enable_version_99 flag |
| bool enable_version_99_; |
| // quic_enable_version_50 flag |
| bool enable_version_50_; |
| // quic_enable_version_49 flag |
| bool enable_version_49_; |
| // quic_enable_version_48_2 flag |
| bool enable_version_48_; |
| // quic_enable_version_47 flag |
| bool enable_version_47_; |
| // quic_supports_tls_handshake flag |
| bool enable_tls_; |
| |
| // The list of versions that may be supported. |
| ParsedQuicVersionVector allowed_supported_versions_; |
| // This vector contains QUIC versions which are currently supported based on |
| // flags. |
| ParsedQuicVersionVector filtered_supported_versions_; |
| // This vector contains the transport versions from |
| // |filtered_supported_versions_|. No guarantees are made that the same |
| // transport version isn't repeated. |
| QuicTransportVersionVector filtered_transport_versions_; |
| }; |
| |
| } // namespace quic |
| |
| #endif // QUICHE_QUIC_CORE_QUIC_VERSION_MANAGER_H_ |