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PiperOrigin-RevId: 237361882
Change-Id: I109a68f44db867b20f8c6a7732b0ce657133e52a

quic/core/quic_version_manager.h

diff --git a/quic/core/quic_version_manager.h b/quic/core/quic_version_manager.h
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+// 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:
+  // Maybe refilter filtered_supported_versions_ based on flags.
+  void MaybeRefilterSupportedVersions();
+
+  // Refilters filtered_supported_versions_.
+  virtual void RefilterSupportedVersions();
+
+  const QuicTransportVersionVector& filtered_supported_versions() const {
+    return filtered_transport_versions_;
+  }
+
+ private:
+  // quic_enable_version_99 flag
+  bool enable_version_99_;
+  // quic_enable_version_47 flag
+  bool enable_version_47_;
+  // quic_enable_version_46 flag
+  bool enable_version_46_;
+  // quic_enable_version_44 flag
+  bool enable_version_44_;
+  // quic_enable_version_43 flag
+  bool enable_version_43_;
+  // quic_disable_version_39 flag
+  bool disable_version_39_;
+  // 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_