net: move udp directory into socket

net/udp/datagram_socket.h

-// Copyright (c) 2011 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_SOCKET_H_
-#define NET_UDP_DATAGRAM_SOCKET_H_
-
-#include "net/base/net_export.h"
-
-namespace net {
-
-class IPEndPoint;
-class NetLogWithSource;
-
-// A datagram socket is an interface to a protocol which exchanges
-// datagrams, like UDP.
-class NET_EXPORT_PRIVATE DatagramSocket {
- public:
-  // Type of source port binding to use.
-  enum BindType {
-    RANDOM_BIND,
-    DEFAULT_BIND,
-  };
-
-  virtual ~DatagramSocket() {}
-
-  // Close the socket.
-  virtual void Close() = 0;
-
-  // Copy the remote udp address into |address| and return a network error code.
-  virtual int GetPeerAddress(IPEndPoint* address) const = 0;
-
-  // Copy the local udp address into |address| and return a network error code.
-  // (similar to getsockname)
-  virtual int GetLocalAddress(IPEndPoint* address) const = 0;
-
-  // Switch to use non-blocking IO. Must be called right after construction and
-  // before other calls.
-  virtual void UseNonBlockingIO() = 0;
-
-  // Requests that packets sent by this socket not be fragment, either locally
-  // by the host, or by routers (via the DF bit in the IPv4 packet header).
-  // May not be supported by all platforms. Returns a return a network error
-  // code if there was a problem, but the socket will still be usable. Can not
-  // return ERR_IO_PENDING.
-  virtual int SetDoNotFragment() = 0;
-
-  // Gets the NetLog for this socket.
-  virtual const NetLogWithSource& NetLog() const = 0;
-};
-
-}  // namespace net
-
-#endif  // NET_UDP_DATAGRAM_SOCKET_H_