iocore/net/I_UDPConnection.h

/** @file

  A brief file description

  @section license License

  Licensed to the Apache Software Foundation (ASF) under one
  or more contributor license agreements.  See the NOTICE file
  distributed with this work for additional information
  regarding copyright ownership.  The ASF licenses this file
  to you under the Apache License, Version 2.0 (the
  "License"); you may not use this file except in compliance
  with the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
 */

/****************************************************************************

  I_UDPConnection.h
  UDPConnection interface


 ****************************************************************************/

#pragma once

#include "I_EventSystem.h"
#define INK_ETHERNET_MTU_SIZE 1472
class UDPPacket;
/**
   UDP Connection endpoint

   You can schedule packet to be sent immediately or for the future,
   and set up a persistent receive() operation.
 */

class UDPConnection : public Continuation
{
public:
  ~UDPConnection() override{};

  SOCKET getFd();
  void setBinding(struct sockaddr const *);
  void setBinding(const IpAddr &, in_port_t);
  inkcoreapi bool getBinding(struct sockaddr *);

  void destroy();
  int shouldDestroy();
  /**
     <p>
     <b>Callbacks:</b><br>
     cont->handleEvent(NET_EVENT_DATAGRAM_WRITE_ERROR, UDPPacket *) on error
     <br>
     no callback on success.

     @return Action* send can't be cancelled via this Action
     @param c continuation to be called back
     @param p packet to be sent.
   */
  Action *send(Continuation *c, UDPPacket *p);

  /**
     <p>
     <b>Callbacks:</b><br>
     cont->handleEvent(NET_EVENT_DATAGRAM_ERROR, UDPConnection *) on error
     <br>
     cont->handleEvent(NET_EVENT_DATAGRAM_READ_READY, Queue&lt;UDPPacketInternal&gt; *) on incoming packets.

     @return Action* Always returns ACTION_RESULT_NONE.  Can't be
     cancelled via this Action.
     @param c continuation to be called back
   */
  Action *recv(Continuation *c);

  void Release();
  void AddRef();
  int GetRefCount();

  int getPortNum();

  int GetSendGenerationNumber(); // const
  void setContinuation(Continuation *c);

  /**
     Put socket on net queue for read/write polling.

     Not required for UDPConnections created with UDPNetProcessor::UDPBind

     Required for  and UDPNetProcessor::CreateUDPSocket.  They  don't do
     bindToThread() automatically so that the sockets can be passed to
     other Continuations.
  */
  void bindToThread(Continuation *c);

  virtual void UDPConnection_is_abstract() = 0;
};

extern UDPConnection *new_UDPConnection(int fd);