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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.
#include "quiche/quic/core/quic_version_manager.h"
#include <algorithm>
#include "absl/base/macros.h"
#include "quiche/quic/core/quic_versions.h"
#include "quiche/quic/platform/api/quic_flag_utils.h"
#include "quiche/quic/platform/api/quic_flags.h"
namespace quic {
QuicVersionManager::QuicVersionManager(
ParsedQuicVersionVector supported_versions)
: allowed_supported_versions_(std::move(supported_versions)) {}
QuicVersionManager::~QuicVersionManager() {}
const ParsedQuicVersionVector& QuicVersionManager::GetSupportedVersions() {
MaybeRefilterSupportedVersions();
return filtered_supported_versions_;
}
const ParsedQuicVersionVector&
QuicVersionManager::GetSupportedVersionsWithOnlyHttp3() {
MaybeRefilterSupportedVersions();
return filtered_supported_versions_with_http3_;
}
const std::vector<std::string>& QuicVersionManager::GetSupportedAlpns() {
MaybeRefilterSupportedVersions();
return filtered_supported_alpns_;
}
void QuicVersionManager::MaybeRefilterSupportedVersions() {
static_assert(SupportedVersions().size() == 6u,
"Supported versions out of sync");
if (enable_version_2_draft_01_ !=
GetQuicReloadableFlag(quic_enable_version_2_draft_01) ||
disable_version_rfcv1_ !=
GetQuicReloadableFlag(quic_disable_version_rfcv1) ||
disable_version_draft_29_ !=
GetQuicReloadableFlag(quic_disable_version_draft_29) ||
disable_version_q050_ !=
GetQuicReloadableFlag(quic_disable_version_q050) ||
disable_version_q046_ !=
GetQuicReloadableFlag(quic_disable_version_q046) ||
disable_version_q043_ !=
GetQuicReloadableFlag(quic_disable_version_q043)) {
enable_version_2_draft_01_ =
GetQuicReloadableFlag(quic_enable_version_2_draft_01);
disable_version_rfcv1_ = GetQuicReloadableFlag(quic_disable_version_rfcv1);
disable_version_draft_29_ =
GetQuicReloadableFlag(quic_disable_version_draft_29);
disable_version_q050_ = GetQuicReloadableFlag(quic_disable_version_q050);
disable_version_q046_ = GetQuicReloadableFlag(quic_disable_version_q046);
disable_version_q043_ = GetQuicReloadableFlag(quic_disable_version_q043);
RefilterSupportedVersions();
}
}
void QuicVersionManager::RefilterSupportedVersions() {
filtered_supported_versions_ =
FilterSupportedVersions(allowed_supported_versions_);
filtered_supported_versions_with_http3_.clear();
filtered_transport_versions_.clear();
filtered_supported_alpns_.clear();
for (const ParsedQuicVersion& version : filtered_supported_versions_) {
auto transport_version = version.transport_version;
if (std::find(filtered_transport_versions_.begin(),
filtered_transport_versions_.end(),
transport_version) == filtered_transport_versions_.end()) {
filtered_transport_versions_.push_back(transport_version);
}
if (version.UsesHttp3()) {
filtered_supported_versions_with_http3_.push_back(version);
}
if (std::find(filtered_supported_alpns_.begin(),
filtered_supported_alpns_.end(),
AlpnForVersion(version)) == filtered_supported_alpns_.end()) {
filtered_supported_alpns_.emplace_back(AlpnForVersion(version));
}
}
}
void QuicVersionManager::AddCustomAlpn(const std::string& alpn) {
filtered_supported_alpns_.push_back(alpn);
}
} // namespace quic
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