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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_TOOLS_QUIC_TCP_LIKE_TRACE_CONVERTER_H_
#define QUICHE_QUIC_TOOLS_QUIC_TCP_LIKE_TRACE_CONVERTER_H_
#include <vector>
#include "absl/container/flat_hash_map.h"
#include "quic/core/frames/quic_stream_frame.h"
#include "quic/core/quic_interval.h"
#include "quic/core/quic_interval_set.h"
#include "quic/core/quic_types.h"
#include "quic/platform/api/quic_containers.h"
namespace quic {
// This converter converts sent QUIC frames to connection byte offset (just like
// TCP byte sequence number).
class QuicTcpLikeTraceConverter {
public:
// StreamOffsetSegment stores a stream offset range which has contiguous
// connection offset.
struct StreamOffsetSegment {
StreamOffsetSegment();
StreamOffsetSegment(QuicStreamOffset stream_offset,
uint64_t connection_offset,
QuicByteCount data_length);
QuicInterval<QuicStreamOffset> stream_data;
uint64_t connection_offset;
};
QuicTcpLikeTraceConverter();
QuicTcpLikeTraceConverter(const QuicTcpLikeTraceConverter& other) = delete;
QuicTcpLikeTraceConverter(QuicTcpLikeTraceConverter&& other) = delete;
~QuicTcpLikeTraceConverter() {}
// Called when a crypto frame is sent. Returns the corresponding connection
// offsets.
QuicIntervalSet<uint64_t> OnCryptoFrameSent(EncryptionLevel level,
QuicStreamOffset offset,
QuicByteCount data_length);
// Called when a stream frame is sent. Returns the corresponding connection
// offsets.
QuicIntervalSet<uint64_t> OnStreamFrameSent(QuicStreamId stream_id,
QuicStreamOffset offset,
QuicByteCount data_length,
bool fin);
// Called when a control frame is sent. Returns the corresponding connection
// offsets.
QuicInterval<uint64_t> OnControlFrameSent(QuicControlFrameId control_frame_id,
QuicByteCount control_frame_length);
private:
struct StreamInfo {
StreamInfo();
// Stores contiguous connection offset pieces.
std::vector<StreamOffsetSegment> segments;
// Indicates whether fin has been sent.
bool fin;
};
// Called when frame with |offset|, |data_length| and |fin| has been sent.
// Update |info| and returns connection offsets.
QuicIntervalSet<uint64_t> OnFrameSent(QuicStreamOffset offset,
QuicByteCount data_length,
bool fin,
StreamInfo* info);
StreamInfo crypto_frames_info_[NUM_ENCRYPTION_LEVELS];
absl::flat_hash_map<QuicStreamId, StreamInfo> streams_info_;
absl::flat_hash_map<QuicControlFrameId, QuicInterval<uint64_t>>
control_frames_info_;
QuicControlFrameId largest_observed_control_frame_id_;
uint64_t connection_offset_;
};
} // namespace quic
#endif // QUICHE_QUIC_TOOLS_QUIC_TCP_LIKE_TRACE_CONVERTER_H_
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