chrome/browser/extensions/api/socket/socket.h

// 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 CHROME_BROWSER_EXTENSIONS_API_SOCKET_SOCKET_H_
#define CHROME_BROWSER_EXTENSIONS_API_SOCKET_SOCKET_H_
#pragma once

#include <string>

#include "base/callback.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/extensions/api/api_resource.h"
#include "net/base/io_buffer.h"

namespace net {
class AddressList;
class IPEndPoint;
class Socket;
}

namespace extensions {

typedef base::Callback<void(int)> CompletionCallback;
typedef base::Callback<void(int, scoped_refptr<net::IOBuffer> io_buffer)>
    ReadCompletionCallback;
typedef base::Callback<
  void(int, scoped_refptr<net::IOBuffer> io_buffer, const std::string&, int)>
      RecvFromCompletionCallback;

// A Socket wraps a low-level socket and includes housekeeping information that
// we need to manage it in the context of an extension.
class Socket : public APIResource {
 public:
  virtual ~Socket();

  // Returns net::OK if successful, or an error code otherwise.
  virtual void Connect(const std::string& address,
                       int port,
                       const CompletionCallback& callback) = 0;
  virtual void Disconnect() = 0;

  virtual int Bind(const std::string& address, int port) = 0;

  // Returns the number of bytes read into the buffer, or a negative number if
  // an error occurred.
  virtual void Read(int count,
                    const ReadCompletionCallback& callback) = 0;

  // Returns the number of bytes successfully written, or a negative error
  // code. Note that ERR_IO_PENDING means that the operation blocked, in which
  // case |event_notifier| (supplied at socket creation) will eventually be
  // called with the final result (again, either a nonnegative number of bytes
  // written, or a negative error).
  virtual void Write(scoped_refptr<net::IOBuffer> io_buffer,
                     int byte_count,
                     const CompletionCallback& callback) = 0;

  virtual void RecvFrom(int count,
                        const RecvFromCompletionCallback& callback) = 0;

  virtual void SendTo(scoped_refptr<net::IOBuffer> io_buffer,
                      int byte_count,
                      const std::string& address,
                      int port,
                      const CompletionCallback& callback) = 0;

  static bool StringAndPortToAddressList(const std::string& ip_address_str,
                                         int port,
                                         net::AddressList* address_list);
  static bool StringAndPortToIPEndPoint(const std::string& ip_address_str,
                                        int port,
                                        net::IPEndPoint* ip_end_point);
  static void IPEndPointToStringAndPort(const net::IPEndPoint& address,
                                        std::string* ip_address_str,
                                        int* port);

 protected:
  explicit Socket(APIResourceEventNotifier* event_notifier);
  const std::string address_;
  int port_;
  bool is_connected_;
};

}  //  namespace extensions

#endif  // CHROME_BROWSER_EXTENSIONS_API_SOCKET_SOCKET_H_