reliable_quic_stream.h revision 58537e28ecd584eab876aee8be7156509866d23a
1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4// 5// The base class for client/server reliable streams. 6 7#ifndef NET_QUIC_RELIABLE_QUIC_STREAM_H_ 8#define NET_QUIC_RELIABLE_QUIC_STREAM_H_ 9 10#include <sys/types.h> 11 12#include <list> 13 14#include "base/strings/string_piece.h" 15#include "net/base/iovec.h" 16#include "net/base/net_export.h" 17#include "net/quic/quic_spdy_compressor.h" 18#include "net/quic/quic_spdy_decompressor.h" 19#include "net/quic/quic_stream_sequencer.h" 20 21namespace net { 22 23namespace test { 24class ReliableQuicStreamPeer; 25} // namespace test 26 27class IPEndPoint; 28class QuicSession; 29class SSLInfo; 30 31// All this does right now is send data to subclasses via the sequencer. 32class NET_EXPORT_PRIVATE ReliableQuicStream : public 33 QuicSpdyDecompressor::Visitor { 34 public: 35 // Visitor receives callbacks from the stream. 36 class Visitor { 37 public: 38 Visitor() {} 39 40 // Called when the stream is closed. 41 virtual void OnClose(ReliableQuicStream* stream) = 0; 42 43 protected: 44 virtual ~Visitor() {} 45 46 private: 47 DISALLOW_COPY_AND_ASSIGN(Visitor); 48 }; 49 50 ReliableQuicStream(QuicStreamId id, 51 QuicSession* session); 52 53 virtual ~ReliableQuicStream(); 54 55 bool WillAcceptStreamFrame(const QuicStreamFrame& frame) const; 56 virtual bool OnStreamFrame(const QuicStreamFrame& frame); 57 58 virtual void OnCanWrite(); 59 60 // Called by the session just before the stream is deleted. 61 virtual void OnClose(); 62 63 // Called when we get a stream reset from the client. 64 virtual void OnStreamReset(QuicRstStreamErrorCode error); 65 66 // Called when we get or send a connection close, and should immediately 67 // close the stream. This is not passed through the sequencer, 68 // but is handled immediately. 69 virtual void ConnectionClose(QuicErrorCode error, bool from_peer); 70 71 // Called when we should process a stream termination or 72 // stream close from the peer. 73 virtual void TerminateFromPeer(bool half_close); 74 75 virtual uint32 ProcessRawData(const char* data, uint32 data_len); 76 virtual uint32 ProcessHeaderData(); 77 78 virtual uint32 ProcessData(const char* data, uint32 data_len) = 0; 79 80 virtual bool OnDecompressedData(base::StringPiece data) OVERRIDE; 81 virtual void OnDecompressionError() OVERRIDE; 82 83 // Called to close the stream from this end. 84 virtual void Close(QuicRstStreamErrorCode error); 85 86 // This block of functions wraps the sequencer's functions of the same 87 // name. These methods return uncompressed data until that has 88 // been fully processed. Then they simply delegate to the sequencer. 89 virtual size_t Readv(const struct iovec* iov, size_t iov_len); 90 virtual int GetReadableRegions(iovec* iov, size_t iov_len); 91 virtual bool IsHalfClosed() const; 92 virtual bool HasBytesToRead() const; 93 94 // Called by the session when a decompression blocked stream 95 // becomes unblocked. 96 virtual void OnDecompressorAvailable(); 97 98 QuicStreamId id() const { return id_; } 99 100 QuicRstStreamErrorCode stream_error() const { return stream_error_; } 101 QuicErrorCode connection_error() const { return connection_error_; } 102 103 bool read_side_closed() const { return read_side_closed_; } 104 bool write_side_closed() const { return write_side_closed_; } 105 106 uint64 stream_bytes_read() { return stream_bytes_read_; } 107 uint64 stream_bytes_written() { return stream_bytes_written_; } 108 109 const IPEndPoint& GetPeerAddress() const; 110 111 void set_visitor(Visitor* visitor) { visitor_ = visitor; } 112 113 QuicSpdyCompressor* compressor(); 114 115 // Gets the SSL connection information. 116 bool GetSSLInfo(SSLInfo* ssl_info); 117 118 bool headers_decompressed() const { return headers_decompressed_; } 119 QuicPriority priority() const { return priority_; } 120 121 protected: 122 // Returns a pair with the number of bytes consumed from data, and a boolean 123 // indicating if the fin bit was consumed. This does not indicate the data 124 // has been sent on the wire: it may have been turned into a packet and queued 125 // if the socket was unexpectedly blocked. 126 // 127 // The default implementation always consumed all bytes and any fin, but 128 // this behavior is not guaranteed for subclasses so callers should check the 129 // return value. 130 virtual QuicConsumedData WriteData(base::StringPiece data, bool fin); 131 132 // Close the read side of the socket. Further frames will not be accepted. 133 virtual void CloseReadSide(); 134 135 // Close the write side of the socket. Further writes will fail. 136 void CloseWriteSide(); 137 138 bool HasBufferedData(); 139 140 bool fin_buffered() { return fin_buffered_; } 141 142 QuicSession* session() { return session_; } 143 144 // Sends as much of 'data' to the connection as the connection will consume, 145 // and then buffers any remaining data in queued_data_. 146 // Returns (data.size(), true) as it always consumed all data: it returns for 147 // convenience to have the same return type as WriteDataInternal. 148 QuicConsumedData WriteOrBuffer(base::StringPiece data, bool fin); 149 150 // Sends as much of 'data' to the connection as the connection will consume. 151 // Returns the number of bytes consumed by the connection. 152 QuicConsumedData WriteDataInternal(base::StringPiece data, bool fin); 153 154 private: 155 friend class test::ReliableQuicStreamPeer; 156 friend class QuicStreamUtils; 157 158 uint32 StripPriorityAndHeaderId(const char* data, uint32 data_len); 159 160 std::list<string> queued_data_; 161 162 QuicStreamSequencer sequencer_; 163 QuicStreamId id_; 164 QuicSession* session_; 165 // Optional visitor of this stream to be notified when the stream is closed. 166 Visitor* visitor_; 167 // Bytes read and written refer to payload bytes only: they do not include 168 // framing, encryption overhead etc. 169 uint64 stream_bytes_read_; 170 uint64 stream_bytes_written_; 171 // True if the headers have been completely decompresssed. 172 bool headers_decompressed_; 173 // The priority of the stream, once parsed. 174 QuicPriority priority_; 175 // ID of the header block sent by the peer, once parsed. 176 QuicHeaderId headers_id_; 177 // Buffer into which we write bytes from priority_ and headers_id_ 178 // until each is fully parsed. 179 string headers_id_and_priority_buffer_; 180 // Contains a copy of the decompressed headers_ until they are consumed 181 // via ProcessData or Readv. 182 string decompressed_headers_; 183 // True if an error was encountered during decompression. 184 bool decompression_failed_; 185 186 // Stream error code received from a RstStreamFrame or error code sent by the 187 // visitor or sequencer in the RstStreamFrame. 188 QuicRstStreamErrorCode stream_error_; 189 // Connection error code due to which the stream was closed. |stream_error_| 190 // is set to |QUIC_STREAM_CONNECTION_ERROR| when this happens and consumers 191 // should check |connection_error_|. 192 QuicErrorCode connection_error_; 193 194 // True if the read side is closed and further frames should be rejected. 195 bool read_side_closed_; 196 // True if the write side is closed, and further writes should fail. 197 bool write_side_closed_; 198 199 // True if the priority has been read, false otherwise. 200 bool priority_parsed_; 201 bool fin_buffered_; 202 bool fin_sent_; 203}; 204 205} // namespace net 206 207#endif // NET_QUIC_RELIABLE_QUIC_STREAM_H_ 208