net: move udp directory into socket

net/udp/datagram_server_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 NET_UDP_DATAGRAM_SERVER_SOCKET_H_
-#define NET_UDP_DATAGRAM_SERVER_SOCKET_H_
-
-#include <stdint.h>
-
-#include "net/base/completion_callback.h"
-#include "net/base/net_export.h"
-#include "net/udp/datagram_socket.h"
-#include "net/udp/diff_serv_code_point.h"
-
-namespace net {
-
-class IPAddress;
-class IPEndPoint;
-class IOBuffer;
-
-// A UDP Socket.
-class NET_EXPORT DatagramServerSocket : public DatagramSocket {
- public:
-  ~DatagramServerSocket() override {}
-
-  // Initialize this socket as a server socket listening at |address|.
-  // Returns a network error code.
-  virtual int Listen(const IPEndPoint& address) = 0;
-
-  // Read from a socket and receive sender address information.
-  // |buf| is the buffer to read data into.
-  // |buf_len| is the maximum amount of data to read.
-  // |address| is a buffer provided by the caller for receiving the sender
-  //   address information about the received data.  This buffer must be kept
-  //   alive by the caller until the callback is placed.
-  // |callback| is the callback on completion of the RecvFrom.
-  // Returns a net error code, or ERR_IO_PENDING if the IO is in progress.
-  // If ERR_IO_PENDING is returned, the caller must keep |buf| and |address|
-  // alive until the callback is called.
-  virtual int RecvFrom(IOBuffer* buf,
-                       int buf_len,
-                       IPEndPoint* address,
-                       const CompletionCallback& callback) = 0;
-
-  // Send to a socket with a particular destination.
-  // |buf| is the buffer to send.
-  // |buf_len| is the number of bytes to send.
-  // |address| is the recipient address.
-  // |callback| is the user callback function to call on complete.
-  // Returns a net error code, or ERR_IO_PENDING if the IO is in progress.
-  // If ERR_IO_PENDING is returned, the caller must keep |buf| and |address|
-  // alive until the callback is called.
-  virtual int SendTo(IOBuffer* buf,
-                     int buf_len,
-                     const IPEndPoint& address,
-                     const CompletionCallback& callback) = 0;
-
-  // Set the receive buffer size (in bytes) for the socket.
-  // Returns a net error code.
-  virtual int SetReceiveBufferSize(int32_t size) = 0;
-
-  // Set the send buffer size (in bytes) for the socket.
-  // Returns a net error code.
-  virtual int SetSendBufferSize(int32_t size) = 0;
-
-  // Allow the socket to share the local address to which the socket will
-  // be bound with other processes. Should be called before Listen().
-  virtual void AllowAddressReuse() = 0;
-
-  // Allow sending and receiving packets to and from broadcast addresses.
-  // Should be called before Listen().
-  virtual void AllowBroadcast() = 0;
-
-  // Join the multicast group with address |group_address|.
-  // Returns a network error code.
-  virtual int JoinGroup(const IPAddress& group_address) const = 0;
-
-  // Leave the multicast group with address |group_address|.
-  // If the socket hasn't joined the group, it will be ignored.
-  // It's optional to leave the multicast group before destroying
-  // the socket. It will be done by the OS.
-  // Returns a network error code.
-  virtual int LeaveGroup(const IPAddress& group_address) const = 0;
-
-  // Set interface to use for multicast. If |interface_index| set to 0, default
-  // interface is used.
-  // Should be called before Bind().
-  // Returns a network error code.
-  virtual int SetMulticastInterface(uint32_t interface_index) = 0;
-
-  // Set the time-to-live option for UDP packets sent to the multicast
-  // group address. The default value of this option is 1.
-  // Cannot be negative or more than 255.
-  // Should be called before Bind().
-  // Returns a network error code.
-  virtual int SetMulticastTimeToLive(int time_to_live) = 0;
-
-  // Set the loopback flag for UDP socket. If this flag is true, the host
-  // will receive packets sent to the joined group from itself.
-  // The default value of this option is true.
-  // Should be called before Bind().
-  // Returns a network error code.
-  virtual int SetMulticastLoopbackMode(bool loopback) = 0;
-
-  // Set the Differentiated Services Code Point. May do nothing on
-  // some platforms. Returns a network error code.
-  virtual int SetDiffServCodePoint(DiffServCodePoint dscp) = 0;
-
-  // Resets the thread to be used for thread-safety checks.
-  virtual void DetachFromThread() = 0;
-};
-
-}  // namespace net
-
-#endif  // NET_UDP_DATAGRAM_SERVER_SOCKET_H_