/* * Copyright (c) 2010, Swedish Institute of Computer Science. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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. * * This file is part of the Contiki operating system. * */ /** * \addtogroup rpl-lite * @{ * * \file * Logic for Directed Acyclic Graphs in RPL. * * \author Joakim Eriksson , Nicolas Tsiftes , * Simon Duquennoy * Contributors: George Oikonomou (multicast) */ #include "net/routing/rpl-lite/rpl.h" #include "net/ipv6/uip-sr.h" #include "net/nbr-table.h" #include "net/link-stats.h" /* Log configuration */ #include "sys/log.h" #define LOG_MODULE "RPL" #define LOG_LEVEL LOG_LEVEL_RPL /*---------------------------------------------------------------------------*/ extern rpl_of_t rpl_of0, rpl_mrhof; static rpl_of_t * const objective_functions[] = RPL_SUPPORTED_OFS; static int init_dag_from_dio(rpl_dio_t *dio); /*---------------------------------------------------------------------------*/ /* Allocate instance table. */ rpl_instance_t curr_instance; /*---------------------------------------------------------------------------*/ const char * rpl_dag_state_to_str(enum rpl_dag_state state) { switch(state) { case DAG_INITIALIZED: return "initialized"; case DAG_JOINED: return "joined"; case DAG_REACHABLE: return "reachable"; case DAG_POISONING: return "poisoning"; default: return "unknown"; } } /*---------------------------------------------------------------------------*/ int rpl_dag_get_root_ipaddr(uip_ipaddr_t *ipaddr) { if(curr_instance.used && ipaddr != NULL) { uip_ipaddr_copy(ipaddr, &curr_instance.dag.dag_id); return 1; } return 0; } /*---------------------------------------------------------------------------*/ void rpl_dag_leave(void) { LOG_INFO("leaving DAG "); LOG_INFO_6ADDR(&curr_instance.dag.dag_id); LOG_INFO_(", instance %u\n", curr_instance.instance_id); /* Issue a no-path DAO */ if(!rpl_dag_root_is_root()) { RPL_LOLLIPOP_INCREMENT(curr_instance.dag.dao_curr_seqno); rpl_icmp6_dao_output(0); } /* Forget past link statistics */ link_stats_reset(); /* Remove all neighbors and lnks */ rpl_neighbor_remove_all(); uip_sr_free_all(); /* Stop all timers */ rpl_timers_stop_dag_timers(); /* Remove autoconfigured address */ if((curr_instance.dag.prefix_info.flags & UIP_ND6_RA_FLAG_AUTONOMOUS)) { rpl_reset_prefix(&curr_instance.dag.prefix_info); } /* Mark instance as unused */ curr_instance.used = 0; } /*---------------------------------------------------------------------------*/ void rpl_dag_poison_and_leave(void) { curr_instance.dag.state = DAG_POISONING; rpl_timers_schedule_state_update(); } /*---------------------------------------------------------------------------*/ void rpl_dag_periodic(unsigned seconds) { if(curr_instance.used) { if(curr_instance.dag.lifetime != RPL_LIFETIME(RPL_INFINITE_LIFETIME)) { curr_instance.dag.lifetime = curr_instance.dag.lifetime > seconds ? curr_instance.dag.lifetime - seconds : 0; if(curr_instance.dag.lifetime == 0) { LOG_WARN("DAG expired, poison and leave\n"); curr_instance.dag.state = DAG_POISONING; rpl_timers_schedule_state_update(); } else if(curr_instance.dag.lifetime < 300 && curr_instance.dag.preferred_parent != NULL) { /* Five minutes before expiring, start sending unicast DIS to get an update */ LOG_WARN("DAG expiring in %u seconds, send DIS to preferred parent\n", (unsigned)curr_instance.dag.lifetime); rpl_icmp6_dis_output(rpl_neighbor_get_ipaddr(curr_instance.dag.preferred_parent)); } } } } /*---------------------------------------------------------------------------*/ int rpl_is_addr_in_our_dag(const uip_ipaddr_t *addr) { return curr_instance.used && uip_ipaddr_prefixcmp(&curr_instance.dag.dag_id, addr, curr_instance.dag.prefix_info.length); } /*---------------------------------------------------------------------------*/ rpl_instance_t * rpl_get_default_instance(void) { return curr_instance.used ? &curr_instance : NULL; } /*---------------------------------------------------------------------------*/ rpl_dag_t * rpl_get_any_dag(void) { return curr_instance.used ? &curr_instance.dag : NULL; } /*---------------------------------------------------------------------------*/ static rpl_of_t * find_objective_function(rpl_ocp_t ocp) { unsigned int i; for(i = 0; i < sizeof(objective_functions) / sizeof(objective_functions[0]); i++) { if(objective_functions[i]->ocp == ocp) { return objective_functions[i]; } } return NULL; } /*---------------------------------------------------------------------------*/ void rpl_global_repair(const char *str) { if(rpl_dag_root_is_root()) { LOG_WARN("initiating global repair (%s), version %u, rank %u)\n", str, curr_instance.dag.version, curr_instance.dag.rank); if(LOG_INFO_ENABLED) { rpl_neighbor_print_list("Global repair (before)"); } /* Initiate global repair */ RPL_LOLLIPOP_INCREMENT(curr_instance.dag.version); /* New DAG version */ RPL_LOLLIPOP_INCREMENT(curr_instance.dtsn_out); /* Request new DAOs */ rpl_local_repair("Global repair"); } } /*---------------------------------------------------------------------------*/ static void global_repair_non_root(rpl_dio_t *dio) { if(!rpl_dag_root_is_root()) { LOG_WARN("participating in global repair, version %u, rank %u)\n", curr_instance.dag.version, curr_instance.dag.rank); if(LOG_INFO_ENABLED) { rpl_neighbor_print_list("Global repair (before)"); } /* Re-initialize configuration from DIO */ init_dag_from_dio(dio); rpl_local_repair("Global repair"); } } /*---------------------------------------------------------------------------*/ void rpl_local_repair(const char *str) { if(curr_instance.used) { /* Check needed because this is a public function */ LOG_WARN("local repair (%s)\n", str); if(!rpl_dag_root_is_root()) { curr_instance.dag.state = DAG_INITIALIZED; /* Reset DAG state */ } curr_instance.of->reset(); /* Reset OF */ link_stats_reset(); /* Forget past link statistics */ rpl_neighbor_remove_all(); /* Remove all neighbors */ rpl_timers_dio_reset("Local repair"); /* Reset Trickle timer */ rpl_timers_schedule_state_update(); } } /*---------------------------------------------------------------------------*/ int rpl_dag_ready_to_advertise(void) { if(curr_instance.mop == RPL_MOP_NO_DOWNWARD_ROUTES) { return curr_instance.used && curr_instance.dag.state >= DAG_INITIALIZED; } else { return curr_instance.used && curr_instance.dag.state >= DAG_REACHABLE; } } /*---------------------------------------------------------------------------*/ /* Updates rank and parent */ void rpl_dag_update_state(void) { rpl_rank_t old_rank; if(!curr_instance.used) { return; } old_rank = curr_instance.dag.rank; /* Any scheduled state update is no longer needed */ rpl_timers_unschedule_state_update(); if(curr_instance.dag.state == DAG_POISONING) { rpl_neighbor_set_preferred_parent(NULL); curr_instance.dag.rank = RPL_INFINITE_RANK; if(old_rank != RPL_INFINITE_RANK) { /* Advertise that we are leaving, and leave after a delay */ LOG_WARN("poisoning and leaving after a delay\n"); rpl_timers_dio_reset("Poison routes"); rpl_timers_schedule_leaving(); } } else if(!rpl_dag_root_is_root()) { rpl_nbr_t *old_parent = curr_instance.dag.preferred_parent; rpl_nbr_t *nbr; /* Select and set preferred parent */ rpl_neighbor_set_preferred_parent(rpl_neighbor_select_best()); /* Update rank */ curr_instance.dag.rank = rpl_neighbor_rank_via_nbr(curr_instance.dag.preferred_parent); /* Update better_parent_since flag for each neighbor */ nbr = nbr_table_head(rpl_neighbors); while(nbr != NULL) { if(rpl_neighbor_rank_via_nbr(nbr) < curr_instance.dag.rank) { /* This neighbor would be a better parent than our current. Set 'better_parent_since' if not already set. */ if(nbr->better_parent_since == 0) { nbr->better_parent_since = clock_time(); /* Initialize */ } } else { nbr->better_parent_since = 0; /* Not a better parent */ } nbr = nbr_table_next(rpl_neighbors, nbr); } if(old_parent == NULL || curr_instance.dag.rank < curr_instance.dag.lowest_rank) { /* This is a slight departure from RFC6550: if we had no preferred parent before, * reset lowest_rank. This helps recovering from temporary bad link conditions. */ curr_instance.dag.lowest_rank = curr_instance.dag.rank; } /* Reset DIO timer in case of significant rank update */ if(curr_instance.dag.last_advertised_rank != RPL_INFINITE_RANK && curr_instance.dag.rank != RPL_INFINITE_RANK && ABS((int32_t)curr_instance.dag.rank - curr_instance.dag.last_advertised_rank) > RPL_SIGNIFICANT_CHANGE_THRESHOLD) { LOG_WARN("significant rank update %u->%u\n", curr_instance.dag.last_advertised_rank, curr_instance.dag.rank); /* Update already here to avoid multiple resets in a row */ curr_instance.dag.last_advertised_rank = curr_instance.dag.rank; rpl_timers_dio_reset("Significant rank update"); } /* Parent switch */ if(curr_instance.dag.preferred_parent != old_parent) { /* We just got a parent (was NULL), reset trickle timer to advertise this */ if(old_parent == NULL) { curr_instance.dag.state = DAG_JOINED; rpl_timers_dio_reset("Got parent"); LOG_WARN("found parent: "); LOG_WARN_6ADDR(rpl_neighbor_get_ipaddr(curr_instance.dag.preferred_parent)); LOG_WARN_(", staying in DAG\n"); rpl_timers_unschedule_leaving(); } /* Schedule a DAO */ if(curr_instance.dag.preferred_parent != NULL) { rpl_timers_schedule_dao(); } else { /* We have no more parent, schedule DIS to get a chance to hear updated state */ curr_instance.dag.state = DAG_INITIALIZED; LOG_WARN("no parent, scheduling periodic DIS, will leave if no parent is found\n"); rpl_timers_dio_reset("Poison routes"); rpl_timers_schedule_periodic_dis(); rpl_timers_schedule_leaving(); } if(LOG_INFO_ENABLED) { rpl_neighbor_print_list("Parent switch"); } } } /* Finally, update metric container */ curr_instance.of->update_metric_container(); } /*---------------------------------------------------------------------------*/ static rpl_nbr_t * update_nbr_from_dio(uip_ipaddr_t *from, rpl_dio_t *dio) { rpl_nbr_t *nbr = NULL; const uip_lladdr_t *lladdr; nbr = rpl_neighbor_get_from_ipaddr(from); /* Neighbor not in RPL neighbor table, add it */ if(nbr == NULL) { /* Is the neighbor known by ds6? Drop this request if not. * Typically, the neighbor is added upon receiving a DIO. */ lladdr = uip_ds6_nbr_lladdr_from_ipaddr(from); if(lladdr == NULL) { return NULL; } /* Add neighbor to RPL table */ nbr = nbr_table_add_lladdr(rpl_neighbors, (linkaddr_t *)lladdr, NBR_TABLE_REASON_RPL_DIO, dio); if(nbr == NULL) { LOG_ERR("failed to add neighbor\n"); return NULL; } } /* Update neighbor info from DIO */ nbr->rank = dio->rank; nbr->dtsn = dio->dtsn; #if RPL_WITH_MC memcpy(&nbr->mc, &dio->mc, sizeof(nbr->mc)); #endif /* RPL_WITH_MC */ return nbr; } /*---------------------------------------------------------------------------*/ static void process_dio_from_current_dag(uip_ipaddr_t *from, rpl_dio_t *dio) { rpl_nbr_t *nbr; uint8_t last_dtsn; /* Does the rank make sense at all? */ if(dio->rank < ROOT_RANK) { return; } /* If the DIO sender is on an older version of the DAG, ignore it. The node will eventually hear the global repair and catch up. */ if(rpl_lollipop_greater_than(curr_instance.dag.version, dio->version)) { return; } /* The DIO is valid, proceed further */ /* Update DIO counter for redundancy mngt */ if(dio->rank != RPL_INFINITE_RANK) { curr_instance.dag.dio_counter++; } /* The DIO has a newer version: global repair. * Must come first, as it might remove all neighbors, and we then need * to re-add this source of the DIO to the neighbor table */ if(rpl_lollipop_greater_than(dio->version, curr_instance.dag.version)) { if(curr_instance.dag.rank == ROOT_RANK) { /* The root should not hear newer versions */ LOG_ERR("inconsistent DIO version (current: %u, received: %u), initiate global repair\n", curr_instance.dag.version, dio->version); curr_instance.dag.version = dio->version; /* Update version and trigger global repair */ rpl_global_repair("Inconsistent DIO version"); } else { LOG_WARN("new DIO version (current: %u, received: %u), apply global repair\n", curr_instance.dag.version, dio->version); global_repair_non_root(dio); } } /* Update IPv6 neighbor cache */ if(!rpl_icmp6_update_nbr_table(from, NBR_TABLE_REASON_RPL_DIO, dio)) { LOG_ERR("IPv6 cache full, dropping DIO\n"); return; } /* Add neighbor to RPL neighbor table */ nbr = rpl_neighbor_get_from_ipaddr(from); last_dtsn = nbr != NULL ? nbr->dtsn : RPL_LOLLIPOP_INIT; if(!update_nbr_from_dio(from, dio)) { LOG_ERR("neighbor table full, dropping DIO\n"); return; } /* Init lifetime if not set yet. Refresh it at every DIO from preferred parent. */ if(curr_instance.dag.lifetime == 0 || (nbr != NULL && nbr == curr_instance.dag.preferred_parent)) { LOG_INFO("refreshing lifetime\n"); curr_instance.dag.lifetime = RPL_LIFETIME(RPL_DAG_LIFETIME); } /* If the source is our preferred parent and it increased DTSN, we increment * our DTSN in turn and schedule a DAO (see RFC6550 section 9.6.) */ if(curr_instance.mop != RPL_MOP_NO_DOWNWARD_ROUTES) { if(nbr != NULL && nbr == curr_instance.dag.preferred_parent && rpl_lollipop_greater_than(dio->dtsn, last_dtsn)) { RPL_LOLLIPOP_INCREMENT(curr_instance.dtsn_out); LOG_INFO("DTSN increment %u->%u, schedule new DAO with DTSN %u", last_dtsn, dio->dtsn, curr_instance.dtsn_out); rpl_timers_schedule_dao(); } } } /*---------------------------------------------------------------------------*/ static int init_dag(uint8_t instance_id, uip_ipaddr_t *dag_id, rpl_ocp_t ocp, uip_ipaddr_t *prefix, unsigned prefix_len, uint8_t prefix_flags) { rpl_of_t *of; memset(&curr_instance, 0, sizeof(curr_instance)); /* OF */ of = find_objective_function(ocp); if(of == NULL) { LOG_ERR("ignoring DIO with an unsupported OF: %u\n", ocp); return 0; } /* Prefix */ if(!rpl_set_prefix_from_addr(prefix, prefix_len, prefix_flags)) { LOG_ERR("failed to set prefix\n"); return 0; } /* Instnace */ curr_instance.instance_id = instance_id; curr_instance.of = of; curr_instance.dtsn_out = RPL_LOLLIPOP_INIT; curr_instance.used = 1; /* DAG */ curr_instance.dag.rank = RPL_INFINITE_RANK; curr_instance.dag.last_advertised_rank = RPL_INFINITE_RANK; curr_instance.dag.lowest_rank = RPL_INFINITE_RANK; curr_instance.dag.dao_last_seqno = RPL_LOLLIPOP_INIT; curr_instance.dag.dao_last_acked_seqno = RPL_LOLLIPOP_INIT; curr_instance.dag.dao_curr_seqno = RPL_LOLLIPOP_INIT; memcpy(&curr_instance.dag.dag_id, dag_id, sizeof(curr_instance.dag.dag_id)); return 1; } /*---------------------------------------------------------------------------*/ static int init_dag_from_dio(rpl_dio_t *dio) { if(!init_dag(dio->instance_id, &dio->dag_id, dio->ocp, &dio->prefix_info.prefix, dio->prefix_info.length, dio->prefix_info.flags)) { return 0; } /* Instnace */ curr_instance.mop = dio->mop; curr_instance.mc.type = dio->mc.type; curr_instance.mc.flags = dio->mc.flags; curr_instance.mc.aggr = dio->mc.aggr; curr_instance.mc.prec = dio->mc.prec; curr_instance.max_rankinc = dio->dag_max_rankinc; curr_instance.min_hoprankinc = dio->dag_min_hoprankinc; curr_instance.dio_intdoubl = dio->dag_intdoubl; curr_instance.dio_intmin = dio->dag_intmin; curr_instance.dio_redundancy = dio->dag_redund; curr_instance.default_lifetime = dio->default_lifetime; curr_instance.lifetime_unit = dio->lifetime_unit; /* DAG */ curr_instance.dag.state = DAG_INITIALIZED; curr_instance.dag.preference = dio->preference; curr_instance.dag.grounded = dio->grounded; curr_instance.dag.version = dio->version; curr_instance.dag.dio_intcurrent = dio->dag_intmin; return 1; } /*---------------------------------------------------------------------------*/ static int process_dio_init_dag(uip_ipaddr_t *from, rpl_dio_t *dio) { /* Check MOP */ if(dio->mop != RPL_MOP_NO_DOWNWARD_ROUTES && dio->mop != RPL_MOP_NON_STORING) { LOG_WARN("ignoring DIO with an unsupported MOP: %d\n", dio->mop); return 0; } /* Initialize instance and DAG data structures */ if(!init_dag_from_dio(dio)) { LOG_WARN("failed to initialize DAG\n"); return 0; } /* Init OF and timers */ curr_instance.of->reset(); rpl_timers_dio_reset("Join"); #if RPL_WITH_PROBING rpl_schedule_probing(); #endif /* RPL_WITH_PROBING */ /* Leave the network after RPL_DELAY_BEFORE_LEAVING in case we do not find a parent */ LOG_INFO("initialized DAG with instance ID %u, DAG ID ", curr_instance.instance_id); LOG_INFO_6ADDR(&curr_instance.dag.dag_id); LOG_INFO_(", prexix "); LOG_INFO_6ADDR(&dio->prefix_info.prefix); LOG_INFO_("/%u, rank %u\n", dio->prefix_info.length, curr_instance.dag.rank); LOG_ANNOTATE("#A init=%u\n", curr_instance.dag.dag_id.u8[sizeof(curr_instance.dag.dag_id) - 1]); LOG_WARN("just joined, no parent yet, setting timer for leaving\n"); rpl_timers_schedule_leaving(); return 1; } /*---------------------------------------------------------------------------*/ void rpl_process_dio(uip_ipaddr_t *from, rpl_dio_t *dio) { if(!curr_instance.used && !rpl_dag_root_is_root()) { /* Attempt to init our DAG from this DIO */ if(!process_dio_init_dag(from, dio)) { LOG_WARN("failed to init DAG\n"); return; } } if(curr_instance.used && curr_instance.instance_id == dio->instance_id && uip_ipaddr_cmp(&curr_instance.dag.dag_id, &dio->dag_id)) { process_dio_from_current_dag(from, dio); rpl_dag_update_state(); } } /*---------------------------------------------------------------------------*/ void rpl_process_dis(uip_ipaddr_t *from, int is_multicast) { if(is_multicast) { rpl_timers_dio_reset("Multicast DIS"); } else { /* Add neighbor to cache and reply to the unicast DIS with a unicast DIO*/ if(rpl_icmp6_update_nbr_table(from, NBR_TABLE_REASON_RPL_DIS, NULL) != NULL) { LOG_INFO("unicast DIS, reply to sender\n"); rpl_icmp6_dio_output(from); } } } /*---------------------------------------------------------------------------*/ void rpl_process_dao(uip_ipaddr_t *from, rpl_dao_t *dao) { if(dao->lifetime == 0) { uip_sr_expire_parent(NULL, from, &dao->parent_addr); } else { if(!uip_sr_update_node(NULL, from, &dao->parent_addr, RPL_LIFETIME(dao->lifetime))) { LOG_ERR("failed to add link on incoming DAO\n"); return; } } #if RPL_WITH_DAO_ACK if(dao->flags & RPL_DAO_K_FLAG) { rpl_timers_schedule_dao_ack(from, dao->sequence); } #endif /* RPL_WITH_DAO_ACK */ } /*---------------------------------------------------------------------------*/ #if RPL_WITH_DAO_ACK void rpl_process_dao_ack(uint8_t sequence, uint8_t status) { /* Update dao_last_acked_seqno */ if(rpl_lollipop_greater_than(sequence, curr_instance.dag.dao_last_acked_seqno)) { curr_instance.dag.dao_last_acked_seqno = sequence; } /* Is this an ACK for our last DAO? */ if(sequence == curr_instance.dag.dao_last_seqno) { int status_ok = status < RPL_DAO_ACK_UNABLE_TO_ACCEPT; if(curr_instance.dag.state == DAG_JOINED && status_ok) { curr_instance.dag.state = DAG_REACHABLE; rpl_timers_dio_reset("Reachable"); } if(!status_ok) { /* We got a NACK, start poisoning and leave */ LOG_WARN("DAO-NACK received with seqno %u, status %u, poison and leave\n", sequence, status); curr_instance.dag.state = DAG_POISONING; } } } #endif /* RPL_WITH_DAO_ACK */ /*---------------------------------------------------------------------------*/ int rpl_process_hbh(rpl_nbr_t *sender, uint16_t sender_rank, int loop_detected, int rank_error_signaled) { int drop = 0; if(loop_detected) { if(rank_error_signaled) { #if RPL_LOOP_ERROR_DROP /* Drop packet and reset trickle timer, as per RFC6550 - 11.2.2.2 */ rpl_timers_dio_reset("HBH error"); LOG_WARN("rank error and loop detected, dropping\n"); drop = 1; #endif /* RPL_LOOP_ERROR_DROP */ } /* Attempt to repair the loop by sending a unicast DIO back to the sender * so that it gets a fresh update of our rank. */ rpl_timers_schedule_unicast_dio(sender); } if(rank_error_signaled) { /* A rank error was signalled, attempt to repair it by updating * the sender's rank from ext header */ if(sender != NULL) { sender->rank = sender_rank; /* Select DAG and preferred parent. In case of a parent switch, the new parent will be used to forward the current packet. */ rpl_dag_update_state(); } } return !drop; } /*---------------------------------------------------------------------------*/ void rpl_dag_init_root(uint8_t instance_id, uip_ipaddr_t *dag_id, uip_ipaddr_t *prefix, unsigned prefix_len, uint8_t prefix_flags) { uint8_t version = RPL_LOLLIPOP_INIT; /* If we're in an instance, first leave it */ if(curr_instance.used) { /* We were already root. Increment version */ if(uip_ipaddr_cmp(&curr_instance.dag.dag_id, dag_id)) { version = curr_instance.dag.version; RPL_LOLLIPOP_INCREMENT(version); } rpl_dag_leave(); } /* Init DAG and instance */ init_dag(instance_id, dag_id, RPL_OF_OCP, prefix, prefix_len, prefix_flags); /* Instance */ curr_instance.mop = RPL_MOP_DEFAULT; curr_instance.max_rankinc = RPL_MAX_RANKINC; curr_instance.min_hoprankinc = RPL_MIN_HOPRANKINC; curr_instance.dio_intdoubl = RPL_DIO_INTERVAL_DOUBLINGS; curr_instance.dio_intmin = RPL_DIO_INTERVAL_MIN; curr_instance.dio_redundancy = RPL_DIO_REDUNDANCY; curr_instance.default_lifetime = RPL_DEFAULT_LIFETIME; curr_instance.lifetime_unit = RPL_DEFAULT_LIFETIME_UNIT; /* DAG */ curr_instance.dag.preference = RPL_PREFERENCE; curr_instance.dag.grounded = RPL_GROUNDED; curr_instance.dag.version = version; curr_instance.dag.rank = ROOT_RANK; curr_instance.dag.lifetime = RPL_LIFETIME(RPL_INFINITE_LIFETIME); curr_instance.dag.dio_intcurrent = RPL_DIO_INTERVAL_MIN; curr_instance.dag.state = DAG_REACHABLE; rpl_timers_dio_reset("Init root"); LOG_INFO("created DAG with instance ID %u, DAG ID ", curr_instance.instance_id); LOG_INFO_6ADDR(&curr_instance.dag.dag_id); LOG_INFO_(", rank %u\n", curr_instance.dag.rank); LOG_ANNOTATE("#A root=%u\n", curr_instance.dag.dag_id.u8[sizeof(curr_instance.dag.dag_id) - 1]); } /*---------------------------------------------------------------------------*/ void rpl_dag_init(void) { memset(&curr_instance, 0, sizeof(curr_instance)); rpl_neighbor_init(); } /*---------------------------------------------------------------------------*/ /** @} */