Index: net/quic/reliable_quic_stream.h |
diff --git a/net/quic/reliable_quic_stream.h b/net/quic/reliable_quic_stream.h |
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-// 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. |
-// |
-// The base class for client/server reliable streams. |
- |
-#ifndef NET_QUIC_RELIABLE_QUIC_STREAM_H_ |
-#define NET_QUIC_RELIABLE_QUIC_STREAM_H_ |
- |
-#include <sys/types.h> |
- |
-#include <list> |
-#include <string> |
- |
-#include "base/basictypes.h" |
-#include "base/memory/ref_counted.h" |
-#include "base/strings/string_piece.h" |
-#include "net/base/iovec.h" |
-#include "net/base/net_export.h" |
-#include "net/quic/quic_ack_notifier.h" |
-#include "net/quic/quic_flow_controller.h" |
-#include "net/quic/quic_protocol.h" |
-#include "net/quic/quic_stream_sequencer.h" |
-#include "net/quic/quic_types.h" |
- |
-namespace net { |
- |
-namespace test { |
-class ReliableQuicStreamPeer; |
-} // namespace test |
- |
-class QuicSession; |
- |
-class NET_EXPORT_PRIVATE ReliableQuicStream { |
- public: |
- ReliableQuicStream(QuicStreamId id, |
- QuicSession* session); |
- |
- virtual ~ReliableQuicStream(); |
- |
- // Called when a (potentially duplicate) stream frame has been received |
- // for this stream. |
- virtual void OnStreamFrame(const QuicStreamFrame& frame); |
- |
- // Called when the connection becomes writeable to allow the stream |
- // to write any pending data. |
- virtual void OnCanWrite(); |
- |
- // Called by the session just before the stream is deleted. |
- virtual void OnClose(); |
- |
- // Called when we get a stream reset from the peer. |
- virtual void OnStreamReset(const QuicRstStreamFrame& frame); |
- |
- // Called when we get or send a connection close, and should immediately |
- // close the stream. This is not passed through the sequencer, |
- // but is handled immediately. |
- virtual void OnConnectionClosed(QuicErrorCode error, bool from_peer); |
- |
- // Called when the final data has been read. |
- virtual void OnFinRead(); |
- |
- virtual uint32 ProcessRawData(const char* data, uint32 data_len) = 0; |
- |
- // Called to reset the stream from this end. |
- virtual void Reset(QuicRstStreamErrorCode error); |
- |
- // Called to close the entire connection from this end. |
- virtual void CloseConnection(QuicErrorCode error); |
- virtual void CloseConnectionWithDetails(QuicErrorCode error, |
- const std::string& details); |
- |
- // Returns the effective priority for the stream. This value may change |
- // during the life of the stream. |
- virtual QuicPriority EffectivePriority() const = 0; |
- |
- QuicStreamId id() const { return id_; } |
- |
- QuicRstStreamErrorCode stream_error() const { return stream_error_; } |
- QuicErrorCode connection_error() const { return connection_error_; } |
- |
- bool read_side_closed() const { return read_side_closed_; } |
- bool write_side_closed() const { return write_side_closed_; } |
- |
- uint64 stream_bytes_read() const { return stream_bytes_read_; } |
- uint64 stream_bytes_written() const { return stream_bytes_written_; } |
- |
- QuicVersion version() const; |
- |
- void set_fin_sent(bool fin_sent) { fin_sent_ = fin_sent; } |
- void set_rst_sent(bool rst_sent) { rst_sent_ = rst_sent; } |
- |
- void set_fec_policy(FecPolicy fec_policy) { fec_policy_ = fec_policy; } |
- FecPolicy fec_policy() const { return fec_policy_; } |
- |
- // Adjust our flow control windows according to new offset in |frame|. |
- virtual void OnWindowUpdateFrame(const QuicWindowUpdateFrame& frame); |
- |
- int num_frames_received() const; |
- |
- int num_duplicate_frames_received() const; |
- |
- QuicFlowController* flow_controller() { return &flow_controller_; } |
- |
- // Called when we see a frame which could increase the highest offset. |
- // Returns true if the highest offset did increase. |
- bool MaybeIncreaseHighestReceivedOffset(QuicStreamOffset new_offset); |
- // Called when bytese are sent to the peer. |
- void AddBytesSent(QuicByteCount bytes); |
- // Called by the stream sequencer as bytes are consumed from the buffer. |
- // If our receive window has dropped below the threshold, then send a |
- // WINDOW_UPDATE frame. |
- void AddBytesConsumed(QuicByteCount bytes); |
- |
- // Updates the flow controller's send window offset and calls OnCanWrite if |
- // it was blocked before. |
- void UpdateSendWindowOffset(QuicStreamOffset new_offset); |
- |
- // Returns true if the stream is flow control blocked, by the stream flow |
- // control window or the connection flow control window. |
- bool IsFlowControlBlocked(); |
- |
- // Returns true if we have received either a RST or a FIN - either of which |
- // gives a definitive number of bytes which the peer has sent. If this is not |
- // true on stream termination the session must keep track of the stream's byte |
- // offset until a definitive final value arrives. |
- bool HasFinalReceivedByteOffset() const { |
- return fin_received_ || rst_received_; |
- } |
- |
- // Returns true if the stream has queued data waiting to write. |
- bool HasBufferedData() const; |
- |
- protected: |
- // Sends as much of 'data' to the connection as the connection will consume, |
- // and then buffers any remaining data in queued_data_. |
- void WriteOrBufferData( |
- base::StringPiece data, |
- bool fin, |
- QuicAckNotifier::DelegateInterface* ack_notifier_delegate); |
- |
- // Sends as many bytes in the first |count| buffers of |iov| to the connection |
- // as the connection will consume. |
- // If |ack_notifier_delegate| is provided, then it will be notified once all |
- // the ACKs for this write have been received. |
- // Returns the number of bytes consumed by the connection. |
- QuicConsumedData WritevData( |
- const struct iovec* iov, |
- int iov_count, |
- bool fin, |
- QuicAckNotifier::DelegateInterface* ack_notifier_delegate); |
- |
- // Helper method that returns FecProtection to use for writes to the session. |
- FecProtection GetFecProtection(); |
- |
- // Close the read side of the socket. Further frames will not be accepted. |
- virtual void CloseReadSide(); |
- |
- // Close the write side of the socket. Further writes will fail. |
- void CloseWriteSide(); |
- |
- bool fin_buffered() const { return fin_buffered_; } |
- |
- const QuicSession* session() const { return session_; } |
- QuicSession* session() { return session_; } |
- |
- const QuicStreamSequencer* sequencer() const { return &sequencer_; } |
- QuicStreamSequencer* sequencer() { return &sequencer_; } |
- |
- void DisableConnectionFlowControlForThisStream() { |
- stream_contributes_to_connection_flow_control_ = false; |
- } |
- |
- private: |
- friend class test::ReliableQuicStreamPeer; |
- friend class QuicStreamUtils; |
- class ProxyAckNotifierDelegate; |
- |
- struct PendingData { |
- PendingData(std::string data_in, |
- scoped_refptr<ProxyAckNotifierDelegate> delegate_in); |
- ~PendingData(); |
- |
- std::string data; |
- // Delegate that should be notified when the pending data is acked. |
- // Can be nullptr. |
- scoped_refptr<ProxyAckNotifierDelegate> delegate; |
- }; |
- |
- // Calls MaybeSendBlocked on our flow controller, and connection level flow |
- // controller. If we are flow control blocked, marks this stream as write |
- // blocked. |
- void MaybeSendBlocked(); |
- |
- std::list<PendingData> queued_data_; |
- |
- QuicStreamSequencer sequencer_; |
- QuicStreamId id_; |
- QuicSession* session_; |
- // Bytes read and written refer to payload bytes only: they do not include |
- // framing, encryption overhead etc. |
- uint64 stream_bytes_read_; |
- uint64 stream_bytes_written_; |
- |
- // Stream error code received from a RstStreamFrame or error code sent by the |
- // visitor or sequencer in the RstStreamFrame. |
- QuicRstStreamErrorCode stream_error_; |
- // Connection error code due to which the stream was closed. |stream_error_| |
- // is set to |QUIC_STREAM_CONNECTION_ERROR| when this happens and consumers |
- // should check |connection_error_|. |
- QuicErrorCode connection_error_; |
- |
- // True if the read side is closed and further frames should be rejected. |
- bool read_side_closed_; |
- // True if the write side is closed, and further writes should fail. |
- bool write_side_closed_; |
- |
- bool fin_buffered_; |
- bool fin_sent_; |
- |
- // True if this stream has received (and the sequencer has accepted) a |
- // StreamFrame with the FIN set. |
- bool fin_received_; |
- |
- // In combination with fin_sent_, used to ensure that a FIN and/or a RST is |
- // always sent before stream termination. |
- bool rst_sent_; |
- |
- // True if this stream has received a RST stream frame. |
- bool rst_received_; |
- |
- // FEC policy to be used for this stream. |
- FecPolicy fec_policy_; |
- |
- // True if the session this stream is running under is a server session. |
- bool is_server_; |
- |
- QuicFlowController flow_controller_; |
- |
- // The connection level flow controller. Not owned. |
- QuicFlowController* connection_flow_controller_; |
- |
- // Special streams, such as the crypto and headers streams, do not respect |
- // connection level flow control limits (but are stream level flow control |
- // limited). |
- bool stream_contributes_to_connection_flow_control_; |
- |
- DISALLOW_COPY_AND_ASSIGN(ReliableQuicStream); |
-}; |
- |
-} // namespace net |
- |
-#endif // NET_QUIC_RELIABLE_QUIC_STREAM_H_ |