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167 lines
5.9 KiB
C
167 lines
5.9 KiB
C
/*
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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: an autonomous scheduler for TSCH exploiting RPL state.
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* See "Orchestra: Robust Mesh Networks Through Autonomously Scheduled TSCH", ACM SenSys'15
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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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#include "net/packetbuf.h"
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#include "net/ipv6/uip-icmp6.h"
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#include "net/rpl/rpl-private.h"
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#include "net/rime/rime.h" /* Needed for so-called rime-sniffer */
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#define DEBUG DEBUG_PRINT
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#include "net/ip/uip-debug.h"
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/* A net-layer sniffer for packets sent and received */
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static void orchestra_packet_received(void);
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static void orchestra_packet_sent(int mac_status);
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RIME_SNIFFER(orhcestra_sniffer, orchestra_packet_received, orchestra_packet_sent);
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/* The current RPL preferred parent's link-layer address */
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linkaddr_t orchestra_parent_linkaddr;
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/* Set to one only after getting an ACK for a DAO sent to our preferred parent */
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int orchestra_parent_knows_us = 0;
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/* The set of Orchestra rules in use */
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const struct orchestra_rule *all_rules[] = ORCHESTRA_RULES;
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#define NUM_RULES (sizeof(all_rules) / sizeof(struct orchestra_rule *))
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/*---------------------------------------------------------------------------*/
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static void
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orchestra_packet_received(void)
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{
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}
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/*---------------------------------------------------------------------------*/
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static void
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orchestra_packet_sent(int mac_status)
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{
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/* Check if our parent just ACKed a DAO */
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if(orchestra_parent_knows_us == 0
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&& mac_status == MAC_TX_OK
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&& packetbuf_attr(PACKETBUF_ATTR_NETWORK_ID) == UIP_PROTO_ICMP6
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&& packetbuf_attr(PACKETBUF_ATTR_CHANNEL) == (ICMP6_RPL << 8 | RPL_CODE_DAO)) {
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if(!linkaddr_cmp(&orchestra_parent_linkaddr, &linkaddr_null)
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&& linkaddr_cmp(&orchestra_parent_linkaddr, packetbuf_addr(PACKETBUF_ADDR_RECEIVER))) {
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orchestra_parent_knows_us = 1;
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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orchestra_callback_child_added(const linkaddr_t *addr)
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{
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/* Notify all Orchestra rules that a child was added */
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int i;
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for(i = 0; i < NUM_RULES; i++) {
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if(all_rules[i]->child_added != NULL) {
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all_rules[i]->child_added(addr);
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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orchestra_callback_child_removed(const linkaddr_t *addr)
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{
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/* Notify all Orchestra rules that a child was removed */
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int i;
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for(i = 0; i < NUM_RULES; i++) {
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if(all_rules[i]->child_removed != NULL) {
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all_rules[i]->child_removed(addr);
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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orchestra_callback_packet_ready(void)
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{
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int i;
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/* By default, use any slotframe, any timeslot */
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uint16_t slotframe = 9;
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uint16_t timeslot = 0xffff;
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/* Loop over all rules until finding one able to handle the packet */
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for(i = 0; i < NUM_RULES; i++) {
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if(all_rules[i]->select_packet != NULL) {
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if(all_rules[i]->select_packet(&slotframe, ×lot)) {
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break;
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}
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}
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}
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#if TSCH_WITH_LINK_SELECTOR
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packetbuf_set_attr(PACKETBUF_ATTR_TSCH_SLOTFRAME, slotframe);
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packetbuf_set_attr(PACKETBUF_ATTR_TSCH_TIMESLOT, timeslot);
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#endif
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}
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/*---------------------------------------------------------------------------*/
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void
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orchestra_callback_new_time_source(const struct tsch_neighbor *old, const struct tsch_neighbor *new)
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{
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/* Orchestra assumes that the time source is also the RPL parent.
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* This is the case if the following is set:
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* #define RPL_CALLBACK_PARENT_SWITCH tsch_rpl_callback_parent_switch
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* */
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int i;
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if(new != old) {
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orchestra_parent_knows_us = 0;
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}
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for(i = 0; i < NUM_RULES; i++) {
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if(all_rules[i]->new_time_source != NULL) {
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all_rules[i]->new_time_source(old, new);
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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orchestra_init(void)
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{
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int i;
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/* Snoop on packet transmission to know if our parent knows about us
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* (i.e. has ACKed at one of our DAOs since we decided to use it as a parent) */
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rime_sniffer_add(&orhcestra_sniffer);
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linkaddr_copy(&orchestra_parent_linkaddr, &linkaddr_null);
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/* Initialize all Orchestra rules */
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for(i = 0; i < NUM_RULES; i++) {
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if(all_rules[i]->init != NULL) {
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PRINTF("Orchestra: initializing rule %u\n", i);
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all_rules[i]->init(i);
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}
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}
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PRINTF("Orchestra: initialization done\n");
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}
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