1 // Copyright 2013 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 #ifndef NET_QUIC_QUIC_PACKET_WRITER_H_ 6 #define NET_QUIC_QUIC_PACKET_WRITER_H_ 7 8 #include "net/base/ip_endpoint.h" 9 #include "net/quic/quic_protocol.h" 10 11 namespace net { 12 13 struct WriteResult; 14 15 // An interface between writers and the entity managing the 16 // socket (in our case the QuicDispatcher). This allows the Dispatcher to 17 // control writes, and manage any writers who end up write blocked. 18 class NET_EXPORT_PRIVATE QuicPacketWriter { 19 public: 20 virtual ~QuicPacketWriter() {} 21 22 // Sends the packet out to the peer. If the write succeeded, the result's 23 // status is WRITE_STATUS_OK and bytes_written is populated. If the write 24 // failed, the result's status is WRITE_STATUS_BLOCKED or WRITE_STATUS_ERROR 25 // and error_code is populated. 26 virtual WriteResult WritePacket( 27 const char* buffer, size_t buf_len, 28 const IPAddressNumber& self_address, 29 const IPEndPoint& peer_address) = 0; 30 31 // Returns true if the writer buffers and subsequently rewrites data 32 // when an attempt to write results in the underlying socket becoming 33 // write blocked. 34 virtual bool IsWriteBlockedDataBuffered() const = 0; 35 36 // Returns true if the network socket is not writable. 37 virtual bool IsWriteBlocked() const = 0; 38 39 // Records that the socket has become writable, for example when an EPOLLOUT 40 // is received or an asynchronous write completes. 41 virtual void SetWritable() = 0; 42 }; 43 44 } // namespace net 45 46 #endif // NET_QUIC_QUIC_PACKET_WRITER_H_ 47
