1 // Copyright (c) 2020 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef QUICHE_QUIC_CORE_FRAMES_QUIC_ACK_FREQUENCY_FRAME_H_ 6 #define QUICHE_QUIC_CORE_FRAMES_QUIC_ACK_FREQUENCY_FRAME_H_ 7 8 #include <cstdint> 9 #include <ostream> 10 11 #include "quiche/quic/core/quic_constants.h" 12 #include "quiche/quic/core/quic_time.h" 13 #include "quiche/quic/core/quic_types.h" 14 #include "quiche/quic/platform/api/quic_export.h" 15 16 namespace quic { 17 18 // A frame that allows sender control of acknowledgement delays. 19 struct QUICHE_EXPORT QuicAckFrequencyFrame { 20 friend QUICHE_EXPORT std::ostream& operator<<( 21 std::ostream& os, const QuicAckFrequencyFrame& ack_frequency_frame); 22 23 QuicAckFrequencyFrame() = default; 24 QuicAckFrequencyFrame(QuicControlFrameId control_frame_id, 25 uint64_t sequence_number, uint64_t packet_tolerance, 26 QuicTime::Delta max_ack_delay); 27 28 // A unique identifier of this control frame. 0 when this frame is 29 // received, and non-zero when sent. 30 QuicControlFrameId control_frame_id = kInvalidControlFrameId; 31 32 // If true, do not ack immediately upon observeation of packet reordering. 33 bool ignore_order = false; 34 35 // Sequence number assigned to the ACK_FREQUENCY frame by the sender to allow 36 // receivers to ignore obsolete frames. 37 uint64_t sequence_number = 0; 38 39 // The maximum number of ack-eliciting packets after which the receiver sends 40 // an acknowledgement. Invald if == 0. 41 uint64_t packet_tolerance = 2; 42 43 // The maximum time that ack packets can be delayed. 44 QuicTime::Delta max_ack_delay = 45 QuicTime::Delta::FromMilliseconds(kDefaultDelayedAckTimeMs); 46 }; 47 48 } // namespace quic 49 50 #endif // QUICHE_QUIC_CORE_FRAMES_QUIC_ACK_FREQUENCY_FRAME_H_ 51