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 #include "net/socket/buffered_write_stream_socket.h" 6 7 #include "base/bind.h" 8 #include "base/location.h" 9 #include "base/message_loop/message_loop.h" 10 #include "net/base/io_buffer.h" 11 #include "net/base/net_errors.h" 12 13 namespace net { 14 15 namespace { 16 17 void AppendBuffer(GrowableIOBuffer* dst, IOBuffer* src, int src_len) { 18 int old_capacity = dst->capacity(); 19 dst->SetCapacity(old_capacity + src_len); 20 memcpy(dst->StartOfBuffer() + old_capacity, src->data(), src_len); 21 } 22 23 } // anonymous namespace 24 25 BufferedWriteStreamSocket::BufferedWriteStreamSocket( 26 scoped_ptr<StreamSocket> socket_to_wrap) 27 : wrapped_socket_(socket_to_wrap.Pass()), 28 io_buffer_(new GrowableIOBuffer()), 29 backup_buffer_(new GrowableIOBuffer()), 30 callback_pending_(false), 31 wrapped_write_in_progress_(false), 32 error_(0), 33 weak_factory_(this) { 34 } 35 36 BufferedWriteStreamSocket::~BufferedWriteStreamSocket() { 37 } 38 39 int BufferedWriteStreamSocket::Read(IOBuffer* buf, int buf_len, 40 const CompletionCallback& callback) { 41 return wrapped_socket_->Read(buf, buf_len, callback); 42 } 43 44 int BufferedWriteStreamSocket::Write(IOBuffer* buf, int buf_len, 45 const CompletionCallback& callback) { 46 if (error_) { 47 return error_; 48 } 49 GrowableIOBuffer* idle_buffer = 50 wrapped_write_in_progress_ ? backup_buffer_.get() : io_buffer_.get(); 51 AppendBuffer(idle_buffer, buf, buf_len); 52 if (!callback_pending_) { 53 base::MessageLoop::current()->PostTask( 54 FROM_HERE, 55 base::Bind(&BufferedWriteStreamSocket::DoDelayedWrite, 56 weak_factory_.GetWeakPtr())); 57 callback_pending_ = true; 58 } 59 return buf_len; 60 } 61 62 bool BufferedWriteStreamSocket::SetReceiveBufferSize(int32 size) { 63 return wrapped_socket_->SetReceiveBufferSize(size); 64 } 65 66 bool BufferedWriteStreamSocket::SetSendBufferSize(int32 size) { 67 return wrapped_socket_->SetSendBufferSize(size); 68 } 69 70 int BufferedWriteStreamSocket::Connect(const CompletionCallback& callback) { 71 return wrapped_socket_->Connect(callback); 72 } 73 74 void BufferedWriteStreamSocket::Disconnect() { 75 wrapped_socket_->Disconnect(); 76 } 77 78 bool BufferedWriteStreamSocket::IsConnected() const { 79 return wrapped_socket_->IsConnected(); 80 } 81 82 bool BufferedWriteStreamSocket::IsConnectedAndIdle() const { 83 return wrapped_socket_->IsConnectedAndIdle(); 84 } 85 86 int BufferedWriteStreamSocket::GetPeerAddress(IPEndPoint* address) const { 87 return wrapped_socket_->GetPeerAddress(address); 88 } 89 90 int BufferedWriteStreamSocket::GetLocalAddress(IPEndPoint* address) const { 91 return wrapped_socket_->GetLocalAddress(address); 92 } 93 94 const BoundNetLog& BufferedWriteStreamSocket::NetLog() const { 95 return wrapped_socket_->NetLog(); 96 } 97 98 void BufferedWriteStreamSocket::SetSubresourceSpeculation() { 99 wrapped_socket_->SetSubresourceSpeculation(); 100 } 101 102 void BufferedWriteStreamSocket::SetOmniboxSpeculation() { 103 wrapped_socket_->SetOmniboxSpeculation(); 104 } 105 106 bool BufferedWriteStreamSocket::WasEverUsed() const { 107 return wrapped_socket_->WasEverUsed(); 108 } 109 110 bool BufferedWriteStreamSocket::UsingTCPFastOpen() const { 111 return wrapped_socket_->UsingTCPFastOpen(); 112 } 113 114 bool BufferedWriteStreamSocket::WasNpnNegotiated() const { 115 return wrapped_socket_->WasNpnNegotiated(); 116 } 117 118 NextProto BufferedWriteStreamSocket::GetNegotiatedProtocol() const { 119 return wrapped_socket_->GetNegotiatedProtocol(); 120 } 121 122 bool BufferedWriteStreamSocket::GetSSLInfo(SSLInfo* ssl_info) { 123 return wrapped_socket_->GetSSLInfo(ssl_info); 124 } 125 126 void BufferedWriteStreamSocket::DoDelayedWrite() { 127 int result = wrapped_socket_->Write( 128 io_buffer_.get(), 129 io_buffer_->RemainingCapacity(), 130 base::Bind(&BufferedWriteStreamSocket::OnIOComplete, 131 base::Unretained(this))); 132 if (result == ERR_IO_PENDING) { 133 callback_pending_ = true; 134 wrapped_write_in_progress_ = true; 135 } else { 136 OnIOComplete(result); 137 } 138 } 139 140 void BufferedWriteStreamSocket::OnIOComplete(int result) { 141 callback_pending_ = false; 142 wrapped_write_in_progress_ = false; 143 if (backup_buffer_->RemainingCapacity()) { 144 AppendBuffer(io_buffer_.get(), backup_buffer_.get(), 145 backup_buffer_->RemainingCapacity()); 146 backup_buffer_->SetCapacity(0); 147 } 148 if (result < 0) { 149 error_ = result; 150 io_buffer_->SetCapacity(0); 151 } else { 152 io_buffer_->set_offset(io_buffer_->offset() + result); 153 if (io_buffer_->RemainingCapacity()) { 154 DoDelayedWrite(); 155 } else { 156 io_buffer_->SetCapacity(0); 157 } 158 } 159 } 160 161 } // namespace net 162