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check if objective function is supported before adding as parent and creating a dag

This commit is contained in:
Joakim Eriksson 2015-09-29 18:24:03 +02:00
parent 552408b241
commit 24a38a3aa8
1 changed files with 9 additions and 11 deletions
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20
core/net/rpl/rpl-dag.c
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@ -938,6 +938,15 @@ rpl_join_instance(uip_ipaddr_t *from, rpl_dio_t *dio)
rpl_parent_t *p;
rpl_of_t *of;
/* Determine the objective function by using the
objective code point of the DIO. */
of = rpl_find_of(dio->ocp);
if(of == NULL) {
PRINTF("RPL: DIO for DAG instance %u does not specify a supported OF: %u\n",
dio->instance_id, dio->ocp);
return;
}
dag = rpl_alloc_dag(dio->instance_id, &dio->dag_id);
if(dag == NULL) {
PRINTF("RPL: Failed to allocate a DAG object!\n");
@ -958,17 +967,6 @@ rpl_join_instance(uip_ipaddr_t *from, rpl_dio_t *dio)
p->dtsn = dio->dtsn;
PRINTF("succeeded\n");
/* Determine the objective function by using the
objective code point of the DIO. */
of = rpl_find_of(dio->ocp);
if(of == NULL) {
PRINTF("RPL: DIO for DAG instance %u does not specify a supported OF\n",
dio->instance_id);
rpl_remove_parent(p);
instance->used = 0;
return;
}
/* Autoconfigure an address if this node does not already have an address
with this prefix. */
if(dio->prefix_info.flags & UIP_ND6_RA_FLAG_AUTONOMOUS) {