static gnrc_rpl_dodag_t *_root_dodag_init(uint8_t instance_id, ipv6_addr_t *dodag_id, uint8_t mop) { if (gnrc_rpl_pid == KERNEL_PID_UNDEF) { DEBUG("RPL: RPL thread not started\n"); return NULL; } ipv6_addr_t *configured_addr; gnrc_ipv6_netif_addr_t *netif_addr = NULL; gnrc_rpl_instance_t *inst = NULL; gnrc_rpl_dodag_t *dodag = NULL; if (instance_id == 0) { DEBUG("RPL: instance id (%d) must be a positive number greater than zero\n", instance_id); return NULL; } if (gnrc_ipv6_netif_find_by_addr(&configured_addr, dodag_id) == KERNEL_PID_UNDEF) { DEBUG("RPL: no IPv6 address configured to match the given dodag id: %s\n", ipv6_addr_to_str(addr_str, dodag_id, sizeof(addr_str))); return NULL; } if ((netif_addr = gnrc_ipv6_netif_addr_get(configured_addr)) == NULL) { DEBUG("RPL: no netif address found for %s\n", ipv6_addr_to_str(addr_str, configured_addr, sizeof(addr_str))); return NULL; } if (gnrc_rpl_instance_add(instance_id, &inst)) { inst->of = (gnrc_rpl_of_t *) gnrc_rpl_get_of_for_ocp(GNRC_RPL_DEFAULT_OCP); inst->mop = mop; inst->min_hop_rank_inc = GNRC_RPL_DEFAULT_MIN_HOP_RANK_INCREASE; inst->max_rank_inc = GNRC_RPL_DEFAULT_MAX_RANK_INCREASE; } else if (inst == NULL) { DEBUG("RPL: could not allocate memory for a new instance with id %d", instance_id); return NULL; } else if (inst->mop != mop) { DEBUG("RPL: instance (%d) exists with another MOP", instance_id); return NULL; } if (!gnrc_rpl_dodag_add(inst, dodag_id, &dodag)) { DEBUG("RPL: DODAG with id %s exists or no memory left for a new DODAG", ipv6_addr_to_str(addr_str, dodag_id, sizeof(addr_str))); return NULL; } dodag->prefix_len = netif_addr->prefix_len; dodag->addr_preferred = netif_addr->preferred; dodag->addr_valid = netif_addr->valid; return dodag; }
void gnrc_rpl_recv_DIO(gnrc_rpl_dio_t *dio, kernel_pid_t iface, ipv6_addr_t *src, uint16_t len) { gnrc_rpl_instance_t *inst = NULL; gnrc_rpl_dodag_t *dodag = NULL; if (!_gnrc_rpl_check_DIO_validity(dio, len)) { return; } len -= (sizeof(gnrc_rpl_dio_t) + sizeof(icmpv6_hdr_t)); if (gnrc_rpl_instance_add(dio->instance_id, &inst)) { /* new instance and DODAG */ if (byteorder_ntohs(dio->rank) == GNRC_RPL_INFINITE_RANK) { DEBUG("RPL: ignore INFINITE_RANK DIO when we are not yet part of this DODAG\n"); gnrc_rpl_instance_remove(inst); return; } inst->mop = (dio->g_mop_prf >> GNRC_RPL_MOP_SHIFT) & GNRC_RPL_SHIFTED_MOP_MASK; inst->of = gnrc_rpl_get_of_for_ocp(GNRC_RPL_DEFAULT_OCP); if (iface == KERNEL_PID_UNDEF) { iface = gnrc_ipv6_netif_find_by_addr(NULL, &ipv6_addr_all_rpl_nodes); assert(iface != KERNEL_PID_UNDEF); } gnrc_rpl_dodag_init(inst, &dio->dodag_id, iface, NULL); dodag = &inst->dodag; DEBUG("RPL: Joined DODAG (%s).\n", ipv6_addr_to_str(addr_str, &dio->dodag_id, sizeof(addr_str))); gnrc_rpl_parent_t *parent = NULL; if (!gnrc_rpl_parent_add_by_addr(dodag, src, &parent) && (parent == NULL)) { DEBUG("RPL: Could not allocate new parent.\n"); gnrc_rpl_instance_remove(inst); return; } dodag->version = dio->version_number; dodag->grounded = dio->g_mop_prf >> GNRC_RPL_GROUNDED_SHIFT; dodag->prf = dio->g_mop_prf & GNRC_RPL_PRF_MASK; parent->rank = byteorder_ntohs(dio->rank); uint32_t included_opts = 0; if(!_parse_options(GNRC_RPL_ICMPV6_CODE_DIO, inst, (gnrc_rpl_opt_t *)(dio + 1), len, src, &included_opts)) { DEBUG("RPL: Error encountered during DIO option parsing - remove DODAG\n"); gnrc_rpl_instance_remove(inst); return; } if (!(included_opts & (((uint32_t) 1) << GNRC_RPL_OPT_DODAG_CONF))) { #ifndef GNRC_RPL_DODAG_CONF_OPTIONAL_ON_JOIN DEBUG("RPL: DIO without DODAG_CONF option - remove DODAG and request new DIO\n"); gnrc_rpl_instance_remove(inst); gnrc_rpl_send_DIS(NULL, src); return; #else DEBUG("RPL: DIO without DODAG_CONF option - use default trickle parameters\n"); gnrc_rpl_send_DIS(NULL, src); #endif } /* if there was no netif_addr created manually or by a PIO, then leave this DODAG */ if (!dodag->netif_addr) { ipv6_addr_t *configured_addr; if (!(configured_addr = gnrc_ipv6_netif_match_prefix(dodag->iface, &dodag->dodag_id))) { DEBUG("RPL: no IPv6 address configured to match the given dodag id: %s\n", ipv6_addr_to_str(addr_str, &(dodag->dodag_id), sizeof(addr_str))); gnrc_rpl_instance_remove(inst); return; } if (!(dodag->netif_addr = gnrc_ipv6_netif_addr_get(configured_addr))) { DEBUG("RPL: no netif address found for %s\n", ipv6_addr_to_str(addr_str, configured_addr, sizeof(addr_str))); gnrc_rpl_instance_remove(inst); return; } } gnrc_rpl_delay_dao(dodag); trickle_start(gnrc_rpl_pid, &dodag->trickle, GNRC_RPL_MSG_TYPE_TRICKLE_INTERVAL, GNRC_RPL_MSG_TYPE_TRICKLE_CALLBACK, (1 << dodag->dio_min), dodag->dio_interval_doubl, dodag->dio_redun); gnrc_rpl_parent_update(dodag, parent); return; } else if (inst == NULL) {