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// Copyright (c) 2018 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_QUIC_TRACE_VISITOR_H_
#define QUICHE_QUIC_CORE_QUIC_TRACE_VISITOR_H_
#include "quiche/quic/core/quic_connection.h"
#include "quiche/quic/core/quic_types.h"
#include "quic_trace/quic_trace.pb.h"
namespace quic {
// Records a QUIC trace protocol buffer for a QuicConnection. It's the
// responsibility of the user of this visitor to process or store the resulting
// trace, which can be accessed via trace().
class QUICHE_NO_EXPORT QuicTraceVisitor : public QuicConnectionDebugVisitor {
public:
explicit QuicTraceVisitor(const QuicConnection* connection);
void OnPacketSent(QuicPacketNumber packet_number,
QuicPacketLength packet_length, bool has_crypto_handshake,
TransmissionType transmission_type,
EncryptionLevel encryption_level,
const QuicFrames& retransmittable_frames,
const QuicFrames& nonretransmittable_frames,
QuicTime sent_time, uint32_t batch_id) override;
void OnIncomingAck(QuicPacketNumber ack_packet_number,
EncryptionLevel ack_decrypted_level,
const QuicAckFrame& ack_frame, QuicTime ack_receive_time,
QuicPacketNumber largest_observed, bool rtt_updated,
QuicPacketNumber least_unacked_sent_packet) override;
void OnPacketLoss(QuicPacketNumber lost_packet_number,
EncryptionLevel encryption_level,
TransmissionType transmission_type,
QuicTime detection_time) override;
void OnWindowUpdateFrame(const QuicWindowUpdateFrame& frame,
const QuicTime& receive_time) override;
void OnSuccessfulVersionNegotiation(
const ParsedQuicVersion& version) override;
void OnApplicationLimited() override;
void OnAdjustNetworkParameters(QuicBandwidth bandwidth, QuicTime::Delta rtt,
QuicByteCount old_cwnd,
QuicByteCount new_cwnd) override;
// Returns a mutable pointer to the trace. The trace is owned by the
// visitor, but can be moved using Swap() method after the connection is
// finished.
quic_trace::Trace* trace() { return &trace_; }
private:
// Converts QuicTime into a microsecond delta w.r.t. the beginning of the
// connection.
uint64_t ConvertTimestampToRecordedFormat(QuicTime timestamp);
// Populates a quic_trace::Frame message from |frame|.
void PopulateFrameInfo(const QuicFrame& frame,
quic_trace::Frame* frame_record);
// Populates a quic_trace::TransportState message from the associated
// connection.
void PopulateTransportState(quic_trace::TransportState* state);
quic_trace::Trace trace_;
const QuicConnection* connection_;
const QuicTime start_time_;
};
} // namespace quic
#endif // QUICHE_QUIC_CORE_QUIC_TRACE_VISITOR_H_