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/*
* Copyright (c) 2007, Vanderbilt University
* 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 the copyright holders 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 HOLDER 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.
*
* Author: Miklos Maroti, Brano Kusy
*
* Interface for one hop time synchronization. Allows to modify timesync
* messages in the MAC layer with elapsed time of an event (ETA timesync
* primitive). Interface also provides a command to determine offset within
* a CC1000 packet, where the timesync ETA value is stored. word 'timestamping'
* used in describing commands does not refer to metadata.timestamp value,
* rather it refers to the timesync ETA timestamp which is part of data
* payload and is transmitted over the air.
*/
interface PacketTimeSyncOffset
{
/**
* @param 'message_t *ONE msg' message to examine.
*
* Returns TRUE if the current message should be timestamped.
*/
async command bool isSet(message_t* msg);
/**
* @param 'message_t *ONE msg' message to examine.
*
* Returns the offset of where the timesync timestamp is sotred in a
* CC2420 packet
*/
async command uint8_t get(message_t* msg);
/**
* @param 'message_t *ONE msg' message to modify.
*
* Sets the current message to be timestamped in the MAC layer.
*/
async command void set(message_t* msg);
/**
* @param 'message_t *ONE msg' message to modify.
*
* Cancels any pending requests to timestamp the message in MAC.
*/
async command void cancel(message_t* msg);
}
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