137 lines
4.3 KiB
C
137 lines
4.3 KiB
C
/*
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* Copyright (c) 2012-2014, Thingsquare, http://www.thingsquare.com/.
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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 copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/**
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* \addtogroup rpl-lite
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* @{
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*
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* \file
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* DAG root utility functions for RPL.
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*/
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#include "contiki.h"
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#include "contiki-net.h"
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#include "net/routing/rpl-lite/rpl.h"
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#include "net/ipv6/uip-ds6-route.h"
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/* Log configuration */
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#include "sys/log.h"
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#define LOG_MODULE "RPL"
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#define LOG_LEVEL LOG_LEVEL_RPL
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/*---------------------------------------------------------------------------*/
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static void
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set_global_address(uip_ipaddr_t *prefix, uip_ipaddr_t *iid)
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{
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static uip_ipaddr_t root_ipaddr;
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int i;
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uint8_t state;
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/* Assign a unique local address (RFC4193,
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http://tools.ietf.org/html/rfc4193). */
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if(prefix == NULL) {
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uip_ip6addr(&root_ipaddr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0, 0, 0);
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} else {
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memcpy(&root_ipaddr, prefix, 8);
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}
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if(iid == NULL) {
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uip_ds6_set_addr_iid(&root_ipaddr, &uip_lladdr);
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} else {
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memcpy(((uint8_t*)&root_ipaddr) + 8, ((uint8_t*)iid) + 8, 8);
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}
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uip_ds6_addr_add(&root_ipaddr, 0, ADDR_AUTOCONF);
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LOG_INFO("IPv6 addresses: ");
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for(i = 0; i < UIP_DS6_ADDR_NB; i++) {
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state = uip_ds6_if.addr_list[i].state;
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if(uip_ds6_if.addr_list[i].isused &&
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(state == ADDR_TENTATIVE || state == ADDR_PREFERRED)) {
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LOG_INFO_6ADDR(&uip_ds6_if.addr_list[i].ipaddr);
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LOG_INFO_("\n");
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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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rpl_dag_root_set_prefix(uip_ipaddr_t *prefix, uip_ipaddr_t *iid)
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{
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static uint8_t initialized = 0;
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if(!initialized) {
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set_global_address(prefix, iid);
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initialized = 1;
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}
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}
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/*---------------------------------------------------------------------------*/
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int
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rpl_dag_root_start(void)
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{
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struct uip_ds6_addr *root_if;
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int i;
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uint8_t state;
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uip_ipaddr_t *ipaddr = NULL;
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rpl_dag_root_set_prefix(NULL, NULL);
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for(i = 0; i < UIP_DS6_ADDR_NB; i++) {
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state = uip_ds6_if.addr_list[i].state;
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if(uip_ds6_if.addr_list[i].isused &&
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state == ADDR_PREFERRED &&
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!uip_is_addr_linklocal(&uip_ds6_if.addr_list[i].ipaddr)) {
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ipaddr = &uip_ds6_if.addr_list[i].ipaddr;
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}
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}
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root_if = uip_ds6_addr_lookup(ipaddr);
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if(ipaddr != NULL || root_if != NULL) {
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rpl_dag_init_root(RPL_DEFAULT_INSTANCE, ipaddr,
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(uip_ipaddr_t *)rpl_get_global_address(), 64, UIP_ND6_RA_FLAG_AUTONOMOUS);
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rpl_dag_update_state();
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LOG_INFO("created a new RPL DAG\n");
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return 0;
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} else {
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LOG_ERR("failed to create a new RPL DAG\n");
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return -1;
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}
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}
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/*---------------------------------------------------------------------------*/
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int
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rpl_dag_root_is_root(void)
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{
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return curr_instance.used && curr_instance.dag.rank == ROOT_RANK;
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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