/*---------------------------------------------------------------------------*/
void
rpl_dag_root_init_dag(void)
{
rpl_dag_root_init();
ctimer_set(&c, RPL_DAG_GRACE_PERIOD, create_dag_callback, NULL);
to_become_root = 1;
/* Send a DIS packet to request RPL info from neighbors. */
dis_output(NULL);
}
/*---------------------------------------------------------------------------*/
int
rpl_dag_root_init_dag_immediately(void)
{
struct uip_ds6_addr *root_if;
int i;
uint8_t state;
uip_ipaddr_t *ipaddr = NULL;
rpl_dag_root_init();
for(i = 0; i < UIP_DS6_ADDR_NB; i++) {
state = uip_ds6_if.addr_list[i].state;
if(uip_ds6_if.addr_list[i].isused &&
state == ADDR_PREFERRED &&
!uip_is_addr_linklocal(&uip_ds6_if.addr_list[i].ipaddr)) {
ipaddr = &uip_ds6_if.addr_list[i].ipaddr;
}
}
if(ipaddr != NULL) {
root_if = uip_ds6_addr_lookup(ipaddr);
if(root_if != NULL) {
rpl_dag_t *dag;
uip_ipaddr_t prefix;
rpl_set_root(RPL_DEFAULT_INSTANCE, ipaddr);
dag = rpl_get_any_dag();
/* If there are routes in this dag, we remove them all as we are
from now on the new dag root and the old routes are wrong */
if(RPL_IS_STORING(dag->instance)) {
rpl_remove_routes(dag);
}
if(dag->instance != NULL &&
dag->instance->def_route != NULL) {
uip_ds6_defrt_rm(dag->instance->def_route);
dag->instance->def_route = NULL;
}
uip_ip6addr(&prefix, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0, 0, 0, 0);
rpl_set_prefix(dag, &prefix, 64);
PRINTF("RPL: rpl_dag_root_init_dag: created a new RPL dag\n");
return 0;
} else {
PRINTF("RPL: rpl_dag_root_init_dag: failed to create a new RPL DAG\n");
return -1;
}
} else {
PRINTF("RPL: rpl_dag_root_init_dag: failed to create a new RPL DAG, no preferred IP address found\n");
return -2;
}
}