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

net/quic/reliable_quic_stream.cc

Index: net/quic/reliable_quic_stream.cc
diff --git a/net/quic/reliable_quic_stream.cc b/net/quic/reliable_quic_stream.cc
deleted file mode 100644
index 749749b1cdfad5a40140cc55f113592554e7ac6a..0000000000000000000000000000000000000000
--- a/net/quic/reliable_quic_stream.cc
+++ /dev/null
@@ -1,475 +0,0 @@
-// 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/reliable_quic_stream.h"
-
-#include "base/logging.h"
-#include "net/quic/iovector.h"
-#include "net/quic/quic_bug_tracker.h"
-#include "net/quic/quic_flags.h"
-#include "net/quic/quic_flow_controller.h"
-#include "net/quic/quic_session.h"
-#include "net/quic/quic_write_blocked_list.h"
-
-using base::StringPiece;
-using std::min;
-using std::string;
-
-namespace net {
-
-#define ENDPOINT \
-  (perspective_ == Perspective::IS_SERVER ? "Server: " : "Client: ")
-
-namespace {
-
-struct iovec MakeIovec(StringPiece data) {
-  struct iovec iov = {const_cast<char*>(data.data()),
-                      static_cast<size_t>(data.size())};
-  return iov;
-}
-
-size_t GetInitialStreamFlowControlWindowToSend(QuicSession* session) {
-  return session->config()->GetInitialStreamFlowControlWindowToSend();
-}
-
-size_t GetReceivedFlowControlWindow(QuicSession* session) {
-  if (session->config()->HasReceivedInitialStreamFlowControlWindowBytes()) {
-    return session->config()->ReceivedInitialStreamFlowControlWindowBytes();
-  }
-
-  return kMinimumFlowControlSendWindow;
-}
-
-}  // namespace
-
-ReliableQuicStream::PendingData::PendingData(
-    string data_in,
-    QuicAckListenerInterface* ack_listener_in)
-    : data(data_in), offset(0), ack_listener(ack_listener_in) {}
-
-ReliableQuicStream::PendingData::~PendingData() {}
-
-ReliableQuicStream::ReliableQuicStream(QuicStreamId id, QuicSession* session)
-    : queued_data_bytes_(0),
-      sequencer_(this, session->connection()->clock()),
-      id_(id),
-      session_(session),
-      stream_bytes_read_(0),
-      stream_bytes_written_(0),
-      stream_error_(QUIC_STREAM_NO_ERROR),
-      connection_error_(QUIC_NO_ERROR),
-      read_side_closed_(false),
-      write_side_closed_(false),
-      fin_buffered_(false),
-      fin_sent_(false),
-      fin_received_(false),
-      rst_sent_(false),
-      rst_received_(false),
-      perspective_(session_->perspective()),
-      flow_controller_(session_->connection(),
-                       id_,
-                       perspective_,
-                       GetReceivedFlowControlWindow(session),
-                       GetInitialStreamFlowControlWindowToSend(session),
-                       session_->flow_controller()->auto_tune_receive_window()),
-      connection_flow_controller_(session_->flow_controller()),
-      stream_contributes_to_connection_flow_control_(true) {
-  SetFromConfig();
-}
-
-ReliableQuicStream::~ReliableQuicStream() {}
-
-void ReliableQuicStream::SetFromConfig() {}
-
-void ReliableQuicStream::OnStreamFrame(const QuicStreamFrame& frame) {
-  DCHECK_EQ(frame.stream_id, id_);
-
-  DCHECK(!(read_side_closed_ && write_side_closed_));
-
-  if (frame.fin) {
-    fin_received_ = true;
-    if (fin_sent_) {
-      session_->StreamDraining(id_);
-    }
-  }
-
-  if (read_side_closed_) {
-    DVLOG(1) << ENDPOINT << "Ignoring data in frame " << frame.stream_id;
-    // The subclass does not want to read data:  blackhole the data.
-    return;
-  }
-
-  // This count includes duplicate data received.
-  size_t frame_payload_size = frame.data_length;
-  stream_bytes_read_ += frame_payload_size;
-
-  // Flow control is interested in tracking highest received offset.
-  // Only interested in received frames that carry data.
-  if ((!FLAGS_quic_ignore_zero_length_frames || frame_payload_size > 0) &&
-      MaybeIncreaseHighestReceivedOffset(frame.offset + frame_payload_size)) {
-    // As the highest received offset has changed, check to see if this is a
-    // violation of flow control.
-    if (flow_controller_.FlowControlViolation() ||
-        connection_flow_controller_->FlowControlViolation()) {
-      CloseConnectionWithDetails(
-          QUIC_FLOW_CONTROL_RECEIVED_TOO_MUCH_DATA,
-          "Flow control violation after increasing offset");
-      return;
-    }
-  }
-
-  sequencer_.OnStreamFrame(frame);
-}
-
-int ReliableQuicStream::num_frames_received() const {
-  return sequencer_.num_frames_received();
-}
-
-int ReliableQuicStream::num_early_frames_received() const {
-  return sequencer_.num_early_frames_received();
-}
-
-int ReliableQuicStream::num_duplicate_frames_received() const {
-  return sequencer_.num_duplicate_frames_received();
-}
-
-void ReliableQuicStream::OnStreamReset(const QuicRstStreamFrame& frame) {
-  rst_received_ = true;
-  MaybeIncreaseHighestReceivedOffset(frame.byte_offset);
-
-  stream_error_ = frame.error_code;
-  CloseWriteSide();
-  CloseReadSide();
-}
-
-void ReliableQuicStream::OnConnectionClosed(QuicErrorCode error,
-                                            ConnectionCloseSource /*source*/) {
-  if (read_side_closed_ && write_side_closed_) {
-    return;
-  }
-  if (error != QUIC_NO_ERROR) {
-    stream_error_ = QUIC_STREAM_CONNECTION_ERROR;
-    connection_error_ = error;
-  }
-
-  CloseWriteSide();
-  CloseReadSide();
-}
-
-void ReliableQuicStream::OnFinRead() {
-  DCHECK(sequencer_.IsClosed());
-  // OnFinRead can be called due to a FIN flag in a headers block, so there may
-  // have been no OnStreamFrame call with a FIN in the frame.
-  fin_received_ = true;
-  // If fin_sent_ is true, then CloseWriteSide has already been called, and the
-  // stream will be destroyed by CloseReadSide, so don't need to call
-  // StreamDraining.
-  CloseReadSide();
-}
-
-void ReliableQuicStream::Reset(QuicRstStreamErrorCode error) {
-  stream_error_ = error;
-  // Sending a RstStream results in calling CloseStream.
-  session()->SendRstStream(id(), error, stream_bytes_written_);
-  rst_sent_ = true;
-}
-
-void ReliableQuicStream::CloseConnectionWithDetails(QuicErrorCode error,
-                                                    const string& details) {
-  session()->connection()->CloseConnection(
-      error, details, ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
-}
-
-void ReliableQuicStream::WriteOrBufferData(
-    StringPiece data,
-    bool fin,
-    QuicAckListenerInterface* ack_listener) {
-  if (data.empty() && !fin) {
-    QUIC_BUG << "data.empty() && !fin";
-    return;
-  }
-
-  if (fin_buffered_) {
-    QUIC_BUG << "Fin already buffered";
-    return;
-  }
-  if (write_side_closed_) {
-    DLOG(ERROR) << ENDPOINT << "Attempt to write when the write side is closed";
-    return;
-  }
-
-  QuicConsumedData consumed_data(0, false);
-  fin_buffered_ = fin;
-
-  if (queued_data_.empty()) {
-    struct iovec iov(MakeIovec(data));
-    consumed_data = WritevData(&iov, 1, fin, ack_listener);
-    DCHECK_LE(consumed_data.bytes_consumed, data.length());
-  }
-
-  // If there's unconsumed data or an unconsumed fin, queue it.
-  if (consumed_data.bytes_consumed < data.length() ||
-      (fin && !consumed_data.fin_consumed)) {
-    StringPiece remainder(data.substr(consumed_data.bytes_consumed));
-    queued_data_bytes_ += remainder.size();
-    queued_data_.emplace_back(remainder.as_string(), ack_listener);
-  }
-}
-
-void ReliableQuicStream::OnCanWrite() {
-  bool fin = false;
-  while (!queued_data_.empty()) {
-    PendingData* pending_data = &queued_data_.front();
-    QuicAckListenerInterface* ack_listener = pending_data->ack_listener.get();
-    if (queued_data_.size() == 1 && fin_buffered_) {
-      fin = true;
-    }
-    if (pending_data->offset > 0 &&
-        pending_data->offset >= pending_data->data.size()) {
-      // This should be impossible because offset tracks the amount of
-      // pending_data written thus far.
-      QUIC_BUG << "Pending offset is beyond available data. offset: "
-               << pending_data->offset << " vs: " << pending_data->data.size();
-      return;
-    }
-    size_t remaining_len = pending_data->data.size() - pending_data->offset;
-    struct iovec iov = {
-        const_cast<char*>(pending_data->data.data()) + pending_data->offset,
-        remaining_len};
-    QuicConsumedData consumed_data = WritevData(&iov, 1, fin, ack_listener);
-    queued_data_bytes_ -= consumed_data.bytes_consumed;
-    if (consumed_data.bytes_consumed == remaining_len &&
-        fin == consumed_data.fin_consumed) {
-      queued_data_.pop_front();
-    } else {
-      if (consumed_data.bytes_consumed > 0) {
-        pending_data->offset += consumed_data.bytes_consumed;
-      }
-      break;
-    }
-  }
-}
-
-void ReliableQuicStream::MaybeSendBlocked() {
-  flow_controller_.MaybeSendBlocked();
-  if (!stream_contributes_to_connection_flow_control_) {
-    return;
-  }
-  connection_flow_controller_->MaybeSendBlocked();
-  // If the stream is blocked by connection-level flow control but not by
-  // stream-level flow control, add the stream to the write blocked list so that
-  // the stream will be given a chance to write when a connection-level
-  // WINDOW_UPDATE arrives.
-  if (connection_flow_controller_->IsBlocked() &&
-      !flow_controller_.IsBlocked()) {
-    session_->MarkConnectionLevelWriteBlocked(id());
-  }
-}
-
-QuicConsumedData ReliableQuicStream::WritevData(
-    const struct iovec* iov,
-    int iov_count,
-    bool fin,
-    QuicAckListenerInterface* ack_listener) {
-  if (write_side_closed_) {
-    DLOG(ERROR) << ENDPOINT << "Attempt to write when the write side is closed";
-    return QuicConsumedData(0, false);
-  }
-
-  // How much data was provided.
-  size_t write_length = TotalIovecLength(iov, iov_count);
-
-  // A FIN with zero data payload should not be flow control blocked.
-  bool fin_with_zero_data = (fin && write_length == 0);
-
-  // How much data flow control permits to be written.
-  QuicByteCount send_window = flow_controller_.SendWindowSize();
-  if (stream_contributes_to_connection_flow_control_) {
-    send_window =
-        min(send_window, connection_flow_controller_->SendWindowSize());
-  }
-
-  if (session_->ShouldYield(id())) {
-    session_->MarkConnectionLevelWriteBlocked(id());
-    return QuicConsumedData(0, false);
-  }
-
-  if (send_window == 0 && !fin_with_zero_data) {
-    // Quick return if nothing can be sent.
-    MaybeSendBlocked();
-    return QuicConsumedData(0, false);
-  }
-
-  if (write_length > send_window) {
-    // Don't send the FIN unless all the data will be sent.
-    fin = false;
-
-    // Writing more data would be a violation of flow control.
-    write_length = static_cast<size_t>(send_window);
-  }
-
-  QuicConsumedData consumed_data =
-      WritevDataInner(QuicIOVector(iov, iov_count, write_length),
-                      stream_bytes_written_, fin, ack_listener);
-  stream_bytes_written_ += consumed_data.bytes_consumed;
-
-  AddBytesSent(consumed_data.bytes_consumed);
-
-  // The write may have generated a write error causing this stream to be
-  // closed. If so, simply return without marking the stream write blocked.
-  if (write_side_closed_) {
-    return consumed_data;
-  }
-
-  if (consumed_data.bytes_consumed == write_length) {
-    if (!fin_with_zero_data) {
-      MaybeSendBlocked();
-    }
-    if (fin && consumed_data.fin_consumed) {
-      fin_sent_ = true;
-      if (fin_received_) {
-        session_->StreamDraining(id_);
-      }
-      CloseWriteSide();
-    } else if (fin && !consumed_data.fin_consumed) {
-      session_->MarkConnectionLevelWriteBlocked(id());
-    }
-  } else {
-    session_->MarkConnectionLevelWriteBlocked(id());
-  }
-  return consumed_data;
-}
-
-QuicConsumedData ReliableQuicStream::WritevDataInner(
-    QuicIOVector iov,
-    QuicStreamOffset offset,
-    bool fin,
-    QuicAckListenerInterface* ack_notifier_delegate) {
-  return session()->WritevData(this, id(), iov, offset, fin,
-                               ack_notifier_delegate);
-}
-
-void ReliableQuicStream::CloseReadSide() {
-  if (read_side_closed_) {
-    return;
-  }
-  DVLOG(1) << ENDPOINT << "Done reading from stream " << id();
-
-  read_side_closed_ = true;
-  if (write_side_closed_) {
-    DVLOG(1) << ENDPOINT << "Closing stream: " << id();
-    session_->CloseStream(id());
-  }
-}
-
-void ReliableQuicStream::CloseWriteSide() {
-  if (write_side_closed_) {
-    return;
-  }
-  DVLOG(1) << ENDPOINT << "Done writing to stream " << id();
-
-  write_side_closed_ = true;
-  if (read_side_closed_) {
-    DVLOG(1) << ENDPOINT << "Closing stream: " << id();
-    session_->CloseStream(id());
-  }
-}
-
-bool ReliableQuicStream::HasBufferedData() const {
-  return !queued_data_.empty();
-}
-
-QuicVersion ReliableQuicStream::version() const {
-  return session_->connection()->version();
-}
-
-void ReliableQuicStream::StopReading() {
-  DVLOG(1) << ENDPOINT << "Stop reading from stream " << id();
-  sequencer_.StopReading();
-}
-
-const IPEndPoint& ReliableQuicStream::PeerAddressOfLatestPacket() const {
-  return session_->connection()->last_packet_source_address();
-}
-
-void ReliableQuicStream::OnClose() {
-  CloseReadSide();
-  CloseWriteSide();
-
-  if (!fin_sent_ && !rst_sent_) {
-    // For flow control accounting, tell the peer how many bytes have been
-    // written on this stream before termination. Done here if needed, using a
-    // RST_STREAM frame.
-    DVLOG(1) << ENDPOINT << "Sending RST_STREAM in OnClose: " << id();
-    session_->SendRstStream(id(), QUIC_RST_ACKNOWLEDGEMENT,
-                            stream_bytes_written_);
-    rst_sent_ = true;
-  }
-
-  // The stream is being closed and will not process any further incoming bytes.
-  // As there may be more bytes in flight, to ensure that both endpoints have
-  // the same connection level flow control state, mark all unreceived or
-  // buffered bytes as consumed.
-  QuicByteCount bytes_to_consume =
-      flow_controller_.highest_received_byte_offset() -
-      flow_controller_.bytes_consumed();
-  AddBytesConsumed(bytes_to_consume);
-}
-
-void ReliableQuicStream::OnWindowUpdateFrame(
-    const QuicWindowUpdateFrame& frame) {
-  if (flow_controller_.UpdateSendWindowOffset(frame.byte_offset)) {
-    // Writing can be done again!
-    // TODO(rjshade): This does not respect priorities (e.g. multiple
-    //                outstanding POSTs are unblocked on arrival of
-    //                SHLO with initial window).
-    // As long as the connection is not flow control blocked, write on!
-    OnCanWrite();
-  }
-}
-
-bool ReliableQuicStream::MaybeIncreaseHighestReceivedOffset(
-    QuicStreamOffset new_offset) {
-  uint64_t increment =
-      new_offset - flow_controller_.highest_received_byte_offset();
-  if (!flow_controller_.UpdateHighestReceivedOffset(new_offset)) {
-    return false;
-  }
-
-  // If |new_offset| increased the stream flow controller's highest received
-  // offset, increase the connection flow controller's value by the incremental
-  // difference.
-  if (stream_contributes_to_connection_flow_control_) {
-    connection_flow_controller_->UpdateHighestReceivedOffset(
-        connection_flow_controller_->highest_received_byte_offset() +
-        increment);
-  }
-  return true;
-}
-
-void ReliableQuicStream::AddBytesSent(QuicByteCount bytes) {
-  flow_controller_.AddBytesSent(bytes);
-  if (stream_contributes_to_connection_flow_control_) {
-    connection_flow_controller_->AddBytesSent(bytes);
-  }
-}
-
-void ReliableQuicStream::AddBytesConsumed(QuicByteCount bytes) {
-  // Only adjust stream level flow controller if still reading.
-  if (!read_side_closed_) {
-    flow_controller_.AddBytesConsumed(bytes);
-  }
-
-  if (stream_contributes_to_connection_flow_control_) {
-    connection_flow_controller_->AddBytesConsumed(bytes);
-  }
-}
-
-void ReliableQuicStream::UpdateSendWindowOffset(QuicStreamOffset new_window) {
-  if (flow_controller_.UpdateSendWindowOffset(new_window)) {
-    OnCanWrite();
-  }
-}
-
-}  // namespace net