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timestampcontrolmessage.h
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timestampcontrolmessage.h
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/*
* Copyright (c) 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 EMANECONTROLSTIMESTAMPMESSAGE_HEADER_
#define EMANECONTROLSTIMESTAMPMESSAGE_HEADER_
#include "emane/controlmessage.h"
#include "emane/controls/controlmessageids.h"
#include <memory>
namespace EMANE
{
namespace Controls
{
/**
* @class TimeStampControlMessage
*
* @brief Time Stamp Control Message is sent to the emulator physical
* layer to specify the time that should be used for the tx time stamp in the
* EMANE::CommonPHYHeader.
*
* @note If this control message is not sent along with the downstream packet
* the emulator physical layer will use the current time for the tx time stamp.
*
* @note The Start of Transmission (SoT) is the tx time stamp + propagation delay + offset
* of the first frequency segment.
*
* @note Instances are immutable
*/
class TimeStampControlMessage : public ControlMessage
{
public:
/**
* Creates a TimeStampControlMessage on the heap
*
* @param timestamp Time value to use as the tx time in the common PHY Header
*
* @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
TimeStampControlMessage * create(const TimePoint & timestamp);
/**
* Clones the control message on the heap
*
* @return cloned message
*
* @note Caller assumes ownership of the clone
*/
TimeStampControlMessage * clone() const override;
/**
* Destroys an instance
*/
~TimeStampControlMessage();
/**
* Gets the time stamp
*
* @return time stamp
*/
TimePoint getTimeStamp() const;
enum {IDENTIFIER = EMANE_CONTROL_MEASSGE_TIME_STAMP};
private:
class Implementation;
std::unique_ptr<Implementation> pImpl_;
TimeStampControlMessage(const TimePoint & timestamp);
TimeStampControlMessage(const TimeStampControlMessage &);
TimeStampControlMessage &
operator=(const TimeStampControlMessage &) = delete;
};
}
}
#endif // EMANECONTROLSTIMESTAMPMESSAGE_HEADER_