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// Copyright (c) 2020 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_FRAMES_QUIC_ACK_FREQUENCY_FRAME_H_
#define QUICHE_QUIC_CORE_FRAMES_QUIC_ACK_FREQUENCY_FRAME_H_
#include <cstdint>
#include <ostream>
#include "quiche/quic/core/quic_constants.h"
#include "quiche/quic/core/quic_time.h"
#include "quiche/quic/core/quic_types.h"
#include "quiche/quic/platform/api/quic_export.h"
namespace quic {
// A frame that allows sender control of acknowledgement delays.
struct QUIC_EXPORT_PRIVATE QuicAckFrequencyFrame {
friend QUIC_EXPORT_PRIVATE std::ostream& operator<<(
std::ostream& os, const QuicAckFrequencyFrame& ack_frequency_frame);
QuicAckFrequencyFrame() = default;
QuicAckFrequencyFrame(QuicControlFrameId control_frame_id,
uint64_t sequence_number, uint64_t packet_tolerance,
QuicTime::Delta max_ack_delay);
// A unique identifier of this control frame. 0 when this frame is
// received, and non-zero when sent.
QuicControlFrameId control_frame_id = kInvalidControlFrameId;
// If true, do not ack immediately upon observeation of packet reordering.
bool ignore_order = false;
// Sequence number assigned to the ACK_FREQUENCY frame by the sender to allow
// receivers to ignore obsolete frames.
uint64_t sequence_number = 0;
// The maximum number of ack-eliciting packets after which the receiver sends
// an acknowledgement. Invald if == 0.
uint64_t packet_tolerance = 2;
// The maximum time that ack packets can be delayed.
QuicTime::Delta max_ack_delay =
QuicTime::Delta::FromMilliseconds(kDefaultDelayedAckTimeMs);
};
} // namespace quic
#endif // QUICHE_QUIC_CORE_FRAMES_QUIC_ACK_FREQUENCY_FRAME_H_
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