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flowcontrolcontrolmessage.h
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flowcontrolcontrolmessage.h
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/*
* Copyright (c) 2013-2014 - Adjacent Link LLC, Bridgewater, New Jersey
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Adjacent Link LLC nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EMANECONTROLSFLOWCONTROLCONTROLMESSAGE_HEDAER_
#define EMANECONTROLSFLOWCONTROLCONTROLMESSAGE_HEDAER_
#include "emane/controlmessage.h"
#include "emane/controls/controlmessageids.h"
#include <cstdint>
#include <memory>
namespace EMANE
{
namespace Controls
{
/**
* @class FlowControlControlMessage
*
* @brief Flow Control Control Messages are sent between a MAC layer
* and a transport in order to communicate data rate and congestion.
*
* @note This control message will be encapsulated in a SerializedControlMessage
* when delivered as via EMANE::DownstreamTransport::processDownstreamControl() or
* EMANE::UpstreamTransport::processUpstreamControl().
*
* @note Instances are immutable
*/
class FlowControlControlMessage : public ControlMessage
{
public:
/**
* Creates a FlowControlControlMessage instance from a serialization on the heap
*
* @param serialization Message serialization
*
* @throw SerializationException when a valid message cannot be de-serialized
*
* @note Once a control message is passed to another NEM layer using
* EMANE::UpstreamTransport::processUpstreamPacket(),
* EMANE::UpstreamTransport::processUpstreamControl(),
* EMANE::DownstreamTransport::processDownstreamPacket() or
* EMANE::DownstreamTransport::processDownstreamControl() object ownership is
* transferred to the emulator infrastructure along with deallocation responsibility.
* It is not valid to use a control message instance after it has been passed to another
* layer.
*/
static
FlowControlControlMessage * create(const Serialization & serialization);
/**
* Creates a FlowControlControlMessage instance on the heap
*
* @param u16Tokens The current number of tokens
*
* @note Once a control message is passed to another NEM layer using
* EMANE::UpstreamTransport::processUpstreamPacket(),
* EMANE::UpstreamTransport::processUpstreamControl(),
* EMANE::DownstreamTransport::processDownstreamPacket() or
* EMANE::DownstreamTransport::processDownstreamControl() object ownership is
* transferred to the emulator infrastructure along with deallocation responsibility.
* It is not valid to use a control message instance after it has been passed to another
* layer.
*/
static
FlowControlControlMessage * create(std::uint16_t u16Tokens);
/**
* Clones the control message on the heap
*
* @return cloned message
*
* @note Caller assumes ownership of the clone
*/
FlowControlControlMessage * clone() const override;
/**
* Destroys an instance
*/
~FlowControlControlMessage();
/**
* Gets the token count
*/
std::uint16_t getTokens() const;
/**
* Serializes the instance
*
* @throw SerializationException if the instance cannot be serialized
*/
Serialization serialize() const override;
enum {IDENTIFIER = EMANE_CONTROL_MEASSGE_FLOW_CONTROL};
private:
class Implementation;
std::unique_ptr<Implementation> pImpl_;
FlowControlControlMessage(std::uint16_t u16Tokens);
FlowControlControlMessage(const FlowControlControlMessage & r);
FlowControlControlMessage &
operator=(const FlowControlControlMessage &) = delete;
};
}
}
#endif // EMANECONTROLSFLOWCONTROLCONTROLMESSAGE_HEDAER_