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https://github.com/oliverschmidt/contiki.git
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87 lines
3.3 KiB
C
87 lines
3.3 KiB
C
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/*
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* Copyright (c) 2015, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/**
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* \file
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* Orchestra: a slotframe with a single shared link, common to all nodes
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* in the network, used for unicast and broadcast.
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*
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* \author Simon Duquennoy <simonduq@sics.se>
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*/
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#include "contiki.h"
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#include "orchestra.h"
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static uint16_t slotframe_handle = 0;
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static uint16_t channel_offset = 0;
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#if ORCHESTRA_EBSF_PERIOD > 0
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/* There is a slotframe for EBs, use this slotframe for non-EB traffic only */
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#define ORCHESTRA_COMMON_SHARED_TYPE LINK_TYPE_NORMAL
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#else
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/* There is no slotframe for EBs, use this slotframe both EB and non-EB traffic */
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#define ORCHESTRA_COMMON_SHARED_TYPE LINK_TYPE_ADVERTISING
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#endif
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/*---------------------------------------------------------------------------*/
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static int
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select_packet(uint16_t *slotframe, uint16_t *timeslot)
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{
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/* We are the default slotframe, select anything */
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if(slotframe != NULL) {
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*slotframe = slotframe_handle;
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}
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if(timeslot != NULL) {
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*timeslot = 0;
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}
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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static void
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init(uint16_t sf_handle)
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{
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slotframe_handle = sf_handle;
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channel_offset = slotframe_handle;
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/* Default slotframe: for broadcast or unicast to neighbors we
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* do not have a link to */
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struct tsch_slotframe *sf_common = tsch_schedule_add_slotframe(slotframe_handle, ORCHESTRA_COMMON_SHARED_PERIOD);
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tsch_schedule_add_link(sf_common,
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LINK_OPTION_RX | LINK_OPTION_TX | LINK_OPTION_SHARED,
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ORCHESTRA_COMMON_SHARED_TYPE, &tsch_broadcast_address,
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0, channel_offset);
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}
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/*---------------------------------------------------------------------------*/
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struct orchestra_rule default_common = {
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init,
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NULL,
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select_packet,
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NULL,
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NULL,
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};
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