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 "net/third_party/quiche/src/quic/core/quic_constants.h" 12 #include "net/third_party/quiche/src/quic/core/quic_time.h" 13 #include "net/third_party/quiche/src/quic/core/quic_types.h" 14 #include "net/third_party/quiche/src/quic/platform/api/quic_export.h" 15 16 namespace quic { 17 18 // A frame that allows sender control of acknowledgement delays. 19 struct QUIC_EXPORT_PRIVATE QuicAckFrequencyFrame { 20 friend QUIC_EXPORT_PRIVATE std::ostream& operator<<( 21 std::ostream& os, 22 const QuicAckFrequencyFrame& ack_frequency_frame); 23 24 QuicAckFrequencyFrame() = default; 25 QuicAckFrequencyFrame(QuicControlFrameId control_frame_id, 26 uint64_t sequence_number, 27 uint64_t packet_tolerance, 28 QuicTime::Delta max_ack_delay); 29 30 // A unique identifier of this control frame. 0 when this frame is 31 // received, and non-zero when sent. 32 QuicControlFrameId control_frame_id = kInvalidControlFrameId; 33 34 // If true, do not ack immediately upon observeation of packet reordering. 35 bool ignore_order = false; 36 37 // Sequence number assigned to the ACK_FREQUENCY frame by the sender to allow 38 // receivers to ignore obsolete frames. 39 uint64_t sequence_number = 0; 40 41 // The maximum number of ack-eliciting packets after which the receiver sends 42 // an acknowledgement. Invald if == 0. 43 uint64_t packet_tolerance = 2; 44 45 // The maximum time that ack packets can be delayed. 46 QuicTime::Delta max_ack_delay = 47 QuicTime::Delta::FromMilliseconds(kDefaultDelayedAckTimeMs); 48 }; 49 50 } // namespace quic 51 52 #endif // QUICHE_QUIC_CORE_FRAMES_QUIC_ACK_FREQUENCY_FRAME_H_ 53