Move shared files in net/quic/ into net/quic/core/

net/quic/quic_stream_sequencer.cc

-// Copyright (c) 2012 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.
-
-#include "net/quic/quic_stream_sequencer.h"
-
-#include <algorithm>
-#include <limits>
-#include <string>
-#include <utility>
-
-#include "base/logging.h"
-#include "base/strings/string_number_conversions.h"
-#include "net/quic/quic_bug_tracker.h"
-#include "net/quic/quic_clock.h"
-#include "net/quic/quic_flags.h"
-#include "net/quic/quic_protocol.h"
-#include "net/quic/quic_stream_sequencer_buffer.h"
-#include "net/quic/quic_utils.h"
-#include "net/quic/reliable_quic_stream.h"
-
-using base::IntToString;
-using base::StringPiece;
-using std::min;
-using std::numeric_limits;
-using std::string;
-
-namespace net {
-
-QuicStreamSequencer::QuicStreamSequencer(ReliableQuicStream* quic_stream,
-                                         const QuicClock* clock)
-    : stream_(quic_stream),
-      buffered_frames_(kStreamReceiveWindowLimit),
-      close_offset_(numeric_limits<QuicStreamOffset>::max()),
-      blocked_(false),
-      num_frames_received_(0),
-      num_duplicate_frames_received_(0),
-      num_early_frames_received_(0),
-      clock_(clock),
-      ignore_read_data_(false) {}
-
-QuicStreamSequencer::~QuicStreamSequencer() {}
-
-void QuicStreamSequencer::OnStreamFrame(const QuicStreamFrame& frame) {
-  ++num_frames_received_;
-  const QuicStreamOffset byte_offset = frame.offset;
-  const size_t data_len = frame.data_length;
-
-  if (frame.fin) {
-    CloseStreamAtOffset(frame.offset + data_len);
-    if (data_len == 0) {
-      return;
-    }
-  }
-  size_t bytes_written;
-  string error_details;
-  QuicErrorCode result = buffered_frames_.OnStreamData(
-      byte_offset, StringPiece(frame.data_buffer, frame.data_length),
-      clock_->ApproximateNow(), &bytes_written, &error_details);
-  if (result != QUIC_NO_ERROR) {
-    string details = "Stream" + base::Uint64ToString(stream_->id()) + ": " +
-                     QuicUtils::ErrorToString(result) + ": " + error_details +
-                     "\nPeer Address: " +
-                     stream_->PeerAddressOfLatestPacket().ToString();
-    DLOG(WARNING) << QuicUtils::ErrorToString(result);
-    DLOG(WARNING) << details;
-    stream_->CloseConnectionWithDetails(result, details);
-    return;
-  }
-
-  if (bytes_written == 0) {
-    ++num_duplicate_frames_received_;
-    // Silently ignore duplicates.
-    return;
-  }
-
-  if (byte_offset > buffered_frames_.BytesConsumed()) {
-    ++num_early_frames_received_;
-  }
-
-  if (blocked_) {
-    return;
-  }
-
-  if (byte_offset == buffered_frames_.BytesConsumed()) {
-    if (ignore_read_data_) {
-      FlushBufferedFrames();
-    } else {
-      stream_->OnDataAvailable();
-    }
-  }
-}
-
-void QuicStreamSequencer::CloseStreamAtOffset(QuicStreamOffset offset) {
-  const QuicStreamOffset kMaxOffset = numeric_limits<QuicStreamOffset>::max();
-
-  // If there is a scheduled close, the new offset should match it.
-  if (close_offset_ != kMaxOffset && offset != close_offset_) {
-    stream_->Reset(QUIC_MULTIPLE_TERMINATION_OFFSETS);
-    return;
-  }
-
-  close_offset_ = offset;
-
-  MaybeCloseStream();
-}
-
-bool QuicStreamSequencer::MaybeCloseStream() {
-  if (blocked_ || !IsClosed()) {
-    return false;
-  }
-
-  DVLOG(1) << "Passing up termination, as we've processed "
-           << buffered_frames_.BytesConsumed() << " of " << close_offset_
-           << " bytes.";
-  // This will cause the stream to consume the FIN.
-  // Technically it's an error if |num_bytes_consumed| isn't exactly
-  // equal to |close_offset|, but error handling seems silly at this point.
-  if (ignore_read_data_) {
-    // The sequencer is discarding stream data and must notify the stream on
-    // receipt of a FIN because the consumer won't.
-    stream_->OnFinRead();
-  } else {
-    stream_->OnDataAvailable();
-  }
-  buffered_frames_.Clear();
-  return true;
-}
-
-int QuicStreamSequencer::GetReadableRegions(iovec* iov, size_t iov_len) const {
-  DCHECK(!blocked_);
-  return buffered_frames_.GetReadableRegions(iov, iov_len);
-}
-
-bool QuicStreamSequencer::GetReadableRegion(iovec* iov,
-                                            QuicTime* timestamp) const {
-  DCHECK(!blocked_);
-  return buffered_frames_.GetReadableRegion(iov, timestamp);
-}
-
-int QuicStreamSequencer::Readv(const struct iovec* iov, size_t iov_len) {
-  DCHECK(!blocked_);
-  size_t bytes_read = buffered_frames_.Readv(iov, iov_len);
-  stream_->AddBytesConsumed(bytes_read);
-  return static_cast<int>(bytes_read);
-}
-
-bool QuicStreamSequencer::HasBytesToRead() const {
-  return buffered_frames_.HasBytesToRead();
-}
-
-bool QuicStreamSequencer::IsClosed() const {
-  return buffered_frames_.BytesConsumed() >= close_offset_;
-}
-
-void QuicStreamSequencer::MarkConsumed(size_t num_bytes_consumed) {
-  DCHECK(!blocked_);
-  bool result = buffered_frames_.MarkConsumed(num_bytes_consumed);
-  if (!result) {
-    QUIC_BUG << "Invalid argument to MarkConsumed."
-             << " expect to consume: " << num_bytes_consumed
-             << ", but not enough bytes available. " << DebugString();
-    stream_->Reset(QUIC_ERROR_PROCESSING_STREAM);
-    return;
-  }
-  stream_->AddBytesConsumed(num_bytes_consumed);
-}
-
-void QuicStreamSequencer::SetBlockedUntilFlush() {
-  blocked_ = true;
-}
-
-void QuicStreamSequencer::SetUnblocked() {
-  blocked_ = false;
-  if (IsClosed() || HasBytesToRead()) {
-    stream_->OnDataAvailable();
-  }
-}
-
-void QuicStreamSequencer::StopReading() {
-  if (ignore_read_data_) {
-    return;
-  }
-  ignore_read_data_ = true;
-  FlushBufferedFrames();
-}
-
-void QuicStreamSequencer::FlushBufferedFrames() {
-  DCHECK(ignore_read_data_);
-  size_t bytes_flushed = buffered_frames_.FlushBufferedFrames();
-  DVLOG(1) << "Flushing buffered data at offset "
-           << buffered_frames_.BytesConsumed() << " length " << bytes_flushed
-           << " for stream " << stream_->id();
-  stream_->AddBytesConsumed(bytes_flushed);
-  MaybeCloseStream();
-}
-
-size_t QuicStreamSequencer::NumBytesBuffered() const {
-  return buffered_frames_.BytesBuffered();
-}
-
-QuicStreamOffset QuicStreamSequencer::NumBytesConsumed() const {
-  return buffered_frames_.BytesConsumed();
-}
-
-const string QuicStreamSequencer::DebugString() const {
-  // clang-format off
-  return "QuicStreamSequencer:"
-         "\n  bytes buffered: " + IntToString(NumBytesBuffered()) +
-         "\n  bytes consumed: " + IntToString( NumBytesConsumed()) +
-         "\n  has bytes to read: " +  (HasBytesToRead() ? "true" : "false") +
-         "\n  frames received: " + IntToString(num_frames_received()) +
-         "\n  close offset bytes: " + IntToString( close_offset_) +
-         "\n  is closed: " + (IsClosed() ? "true" : "false");
-  // clang-format on
-}
-
-}  // namespace net