Add P2PDatagramSocket and P2PStreamSocket interfaces.

remoting/protocol/p2p_stream_socket.h

+// Copyright 2015 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 REMOTING_PROTOCOL_P2P_STREAM_SOCKET_H_
+#define REMOTING_PROTOCOL_P2P_STREAM_SOCKET_H_
+
+#include "net/base/completion_callback.h"
+
+namespace net {
+class IOBuffer;
+}  // namespace net
+
+namespace remoting {
+namespace protocol {
+
+// Peer-to-peer socket with stream semantics.
+class P2PStreamSocket {
+ public:
+  virtual ~P2PStreamSocket() {};
+
+  // Reads data, up to |buf_len| bytes, from the socket. The number of bytes
+  // read is returned, or an error is returned upon failure. ERR_IO_PENDING
+  // is returned if the operation could not be completed synchronously, in which
+  // case the result will be passed to the callback when available. If the
+  // operation is not completed immediately, the socket acquires a reference to
+  // the provided buffer until the callback is invoked or the socket is
+  // closed. If the socket is destroyed before the read completes, the
+  // callback will not be invoked.
+  virtual int Read(const scoped_refptr<net::IOBuffer>& buf, int buf_len,
+                   const net::CompletionCallback& callback) = 0;
+
+  // Writes data, up to |buf_len| bytes, to the socket. Note: data may be
+  // written partially. The number of bytes written is returned, or an error
+  // is returned upon failure. ERR_IO_PENDING is returned if the operation could
+  // not be completed synchronously, in which case the result will be passed to
+  // the callback when available.  If the operation is not completed
+  // immediately, the socket acquires a reference to the provided buffer until
+  // the callback is invoked or the socket is closed. Implementations of this
+  // method should not modify the contents of the actual buffer that is written
+  // to the socket.
+  virtual int Write(const scoped_refptr<net::IOBuffer>& buf, int buf_len,
+                    const net::CompletionCallback& callback) = 0;
+};
+
+}  // namespace protocol
+}  // namespace remoting
+
+#endif  // REMOTING_PROTOCOL_P2P_STREAM_SOCKET_H_