Initial export of QUIC BBRv2.
PiperOrigin-RevId: 259531121
Change-Id: Idbca8ab50bac5e098bda4ec0a752b1d68a4a3cd2
diff --git a/quic/core/congestion_control/bbr2_startup.h b/quic/core/congestion_control/bbr2_startup.h
new file mode 100644
index 0000000..df3f9a7
--- /dev/null
+++ b/quic/core/congestion_control/bbr2_startup.h
@@ -0,0 +1,68 @@
+// Copyright 2019 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_CONGESTION_CONTROL_BBR2_STARTUP_H_
+#define QUICHE_QUIC_CORE_CONGESTION_CONTROL_BBR2_STARTUP_H_
+
+#include "net/third_party/quiche/src/quic/core/congestion_control/bbr2_misc.h"
+#include "net/third_party/quiche/src/quic/core/quic_bandwidth.h"
+#include "net/third_party/quiche/src/quic/core/quic_time.h"
+#include "net/third_party/quiche/src/quic/core/quic_types.h"
+#include "net/third_party/quiche/src/quic/platform/api/quic_export.h"
+
+namespace quic {
+
+class Bbr2Sender;
+class QUIC_EXPORT_PRIVATE Bbr2StartupMode final : public Bbr2ModeBase {
+ public:
+ Bbr2StartupMode(const Bbr2Sender* sender, Bbr2NetworkModel* model);
+
+ void Enter(const Bbr2CongestionEvent& congestion_event) override;
+
+ Bbr2Mode OnCongestionEvent(
+ QuicByteCount prior_in_flight,
+ QuicTime event_time,
+ const AckedPacketVector& acked_packets,
+ const LostPacketVector& lost_packets,
+ const Bbr2CongestionEvent& congestion_event) override;
+
+ Limits<QuicByteCount> GetCwndLimits() const override {
+ return NoGreaterThan(model_->inflight_lo());
+ }
+
+ bool IsProbingForBandwidth() const override { return true; }
+
+ bool FullBandwidthReached() const { return full_bandwidth_reached_; }
+
+ struct DebugState {
+ bool full_bandwidth_reached;
+ QuicBandwidth full_bandwidth_baseline = QuicBandwidth::Zero();
+ QuicRoundTripCount round_trips_without_bandwidth_growth;
+ };
+
+ DebugState ExportDebugState() const;
+
+ private:
+ const Bbr2Params& Params() const;
+
+ void CheckFullBandwidthReached(const Bbr2CongestionEvent& congestion_event);
+
+ void CheckExcessiveLosses(const LostPacketVector& lost_packets,
+ const Bbr2CongestionEvent& congestion_event);
+
+ bool full_bandwidth_reached_;
+ QuicBandwidth full_bandwidth_baseline_;
+ QuicRoundTripCount rounds_without_bandwidth_growth_;
+
+ // Number of loss events in the current round trip.
+ int64_t loss_events_in_round_;
+};
+
+QUIC_EXPORT_PRIVATE std::ostream& operator<<(
+ std::ostream& os,
+ const Bbr2StartupMode::DebugState& state);
+
+} // namespace quic
+
+#endif // QUICHE_QUIC_CORE_CONGESTION_CONTROL_BBR2_STARTUP_H_
