| // Copyright 2013 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 streams which deliver data to/from an application. |
| // In each direction, the data on such a stream first contains compressed |
| // headers then body data. |
| |
| #ifndef NET_QUIC_QUIC_DATA_STREAM_H_ |
| #define NET_QUIC_QUIC_DATA_STREAM_H_ |
| |
| #include <sys/types.h> |
| |
| #include <list> |
| |
| #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_spdy_compressor.h" |
| #include "net/quic/quic_spdy_decompressor.h" |
| #include "net/quic/quic_stream_sequencer.h" |
| #include "net/quic/reliable_quic_stream.h" |
| |
| namespace net { |
| |
| namespace test { |
| class QuicDataStreamPeer; |
| class ReliableQuicStreamPeer; |
| } // namespace test |
| |
| class IPEndPoint; |
| class QuicSession; |
| class SSLInfo; |
| |
| // All this does right now is send data to subclasses via the sequencer. |
| class NET_EXPORT_PRIVATE QuicDataStream : public ReliableQuicStream, |
| public QuicSpdyDecompressor::Visitor { |
| public: |
| // Visitor receives callbacks from the stream. |
| class Visitor { |
| public: |
| Visitor() {} |
| |
| // Called when the stream is closed. |
| virtual void OnClose(QuicDataStream* stream) = 0; |
| |
| protected: |
| virtual ~Visitor() {} |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(Visitor); |
| }; |
| |
| QuicDataStream(QuicStreamId id, QuicSession* session); |
| |
| virtual ~QuicDataStream(); |
| |
| // ReliableQuicStream implementation |
| virtual void OnClose() OVERRIDE; |
| // By default, this is the same as priority(), however it allows streams |
| // to temporarily alter effective priority. For example if a SPDY stream has |
| // compressed but not written headers it can write the headers with a higher |
| // priority. |
| virtual QuicPriority EffectivePriority() const OVERRIDE; |
| virtual uint32 ProcessRawData(const char* data, uint32 data_len) OVERRIDE; |
| |
| // QuicSpdyDecompressor::Visitor implementation. |
| virtual bool OnDecompressedData(base::StringPiece data) OVERRIDE; |
| virtual void OnDecompressionError() OVERRIDE; |
| |
| virtual uint32 ProcessData(const char* data, uint32 data_len) = 0; |
| |
| // This block of functions wraps the sequencer's functions of the same |
| // name. These methods return uncompressed data until that has |
| // been fully processed. Then they simply delegate to the sequencer. |
| virtual size_t Readv(const struct iovec* iov, size_t iov_len); |
| virtual int GetReadableRegions(iovec* iov, size_t iov_len); |
| // Returns true when all data has been read from the peer, including the fin. |
| virtual bool IsDoneReading() const; |
| virtual bool HasBytesToRead() const; |
| |
| // Called by the session when a decompression blocked stream |
| // becomes unblocked. |
| virtual void OnDecompressorAvailable(); |
| |
| void set_visitor(Visitor* visitor) { visitor_ = visitor; } |
| |
| bool headers_decompressed() const { return headers_decompressed_; } |
| |
| const IPEndPoint& GetPeerAddress(); |
| |
| QuicSpdyCompressor* compressor(); |
| |
| // Gets the SSL connection information. |
| bool GetSSLInfo(SSLInfo* ssl_info); |
| |
| protected: |
| // Sets priority_ to priority. This should only be called before bytes are |
| // written to the server. |
| void set_priority(QuicPriority priority); |
| // This is protected because external classes should use EffectivePriority |
| // instead. |
| QuicPriority priority() const { return priority_; } |
| |
| private: |
| friend class test::QuicDataStreamPeer; |
| friend class test::ReliableQuicStreamPeer; |
| friend class QuicStreamUtils; |
| |
| uint32 ProcessHeaderData(); |
| |
| uint32 StripPriorityAndHeaderId(const char* data, uint32 data_len); |
| |
| bool FinishedReadingHeaders(); |
| |
| Visitor* visitor_; |
| // True if the headers have been completely decompresssed. |
| bool headers_decompressed_; |
| // The priority of the stream, once parsed. |
| QuicPriority priority_; |
| // ID of the header block sent by the peer, once parsed. |
| QuicHeaderId headers_id_; |
| // Buffer into which we write bytes from priority_ and headers_id_ |
| // until each is fully parsed. |
| string headers_id_and_priority_buffer_; |
| // Contains a copy of the decompressed headers until they are consumed |
| // via ProcessData or Readv. |
| string decompressed_headers_; |
| // True if an error was encountered during decompression. |
| bool decompression_failed_; |
| // True if the priority has been read, false otherwise. |
| bool priority_parsed_; |
| |
| DISALLOW_COPY_AND_ASSIGN(QuicDataStream); |
| }; |
| |
| } // namespace net |
| |
| #endif // NET_QUIC_QUIC_DATA_STREAM_H_ |