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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.
#ifndef JINGLE_GLUE_PSEUDOTCP_ADAPTER_H_
#define JINGLE_GLUE_PSEUDOTCP_ADAPTER_H_
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/timer.h"
#include "base/threading/non_thread_safe.h"
#include "net/base/net_log.h"
#include "net/socket/stream_socket.h"
#include "third_party/libjingle/source/talk/p2p/base/pseudotcp.h"
namespace jingle_glue {
// PseudoTcpAdapter adapts a connectionless net::Socket to a connection-
// oriented net::StreamSocket using PseudoTcp. Because net::StreamSockets
// can be deleted during callbacks, while PseudoTcp cannot, the core of the
// PseudoTcpAdapter is reference counted, with a reference held by the
// adapter, and an additional reference held on the stack during callbacks.
class PseudoTcpAdapter : public net::StreamSocket, base::NonThreadSafe {
public:
// Creates an adapter for the supplied Socket. |socket| should already
// be ready for use, and ownership of it will be assumed by the adapter.
PseudoTcpAdapter(net::Socket* socket);
virtual ~PseudoTcpAdapter();
// net::Socket implementation.
virtual int Read(net::IOBuffer* buffer, int buffer_size,
const net::CompletionCallback& callback) OVERRIDE;
virtual int Write(net::IOBuffer* buffer, int buffer_size,
const net::CompletionCallback& callback) OVERRIDE;
virtual bool SetReceiveBufferSize(int32 size) OVERRIDE;
virtual bool SetSendBufferSize(int32 size) OVERRIDE;
// net::StreamSocket implementation.
virtual int Connect(const net::CompletionCallback& callback) OVERRIDE;
virtual void Disconnect() OVERRIDE;
virtual bool IsConnected() const OVERRIDE;
virtual bool IsConnectedAndIdle() const OVERRIDE;
virtual int GetPeerAddress(net::IPEndPoint* address) const OVERRIDE;
virtual int GetLocalAddress(net::IPEndPoint* address) const OVERRIDE;
virtual const net::BoundNetLog& NetLog() const OVERRIDE;
virtual void SetSubresourceSpeculation() OVERRIDE;
virtual void SetOmniboxSpeculation() OVERRIDE;
virtual bool WasEverUsed() const OVERRIDE;
virtual bool UsingTCPFastOpen() const OVERRIDE;
virtual int64 NumBytesRead() const OVERRIDE;
virtual base::TimeDelta GetConnectTimeMicros() const OVERRIDE;
virtual bool WasNpnNegotiated() const OVERRIDE;
virtual net::NextProto GetNegotiatedProtocol() const OVERRIDE;
virtual bool GetSSLInfo(net::SSLInfo* ssl_info) OVERRIDE;
// Set the delay for sending ACK.
void SetAckDelay(int delay_ms);
// Set whether Nagle's algorithm is enabled.
void SetNoDelay(bool no_delay);
// When write_waits_for_send flag is set to true the Write() method
// will wait until the data is sent to the remote end before the
// write completes (it still doesn't wait until the data is received
// and acknowledged by the remote end). Otherwise write completes
// after the data has been copied to the send buffer.
//
// This flag is useful in cases when the sender needs to get
// feedback from the connection when it is congested. E.g. remoting
// host uses this feature to adjust screen capturing rate according
// to the available bandwidth. In the same time it may negatively
// impact performance in some cases. E.g. when the sender writes one
// byte at a time then each byte will always be sent in a separate
// packet.
//
// TODO(sergeyu): Remove this flag once remoting has a better
// flow-control solution.
void SetWriteWaitsForSend(bool write_waits_for_send);
private:
class Core;
scoped_refptr<Core> core_;
net::BoundNetLog net_log_;
DISALLOW_COPY_AND_ASSIGN(PseudoTcpAdapter);
};
} // namespace jingle_glue
#endif // JINGLE_GLUE_STREAM_SOCKET_ADAPTER_H_