RPL: when no probing target is found, probe least recently updated parent
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@ -354,11 +354,11 @@ get_probing_target(rpl_dag_t *dag)
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/* Our preferred parent needs probing */
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if(dag->preferred_parent->last_tx_time < min_last_tx) {
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return dag->preferred_parent;
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probing_target = dag->preferred_parent;
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}
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if((random_rand() % 2) == 0) {
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/* With 1/2 probability: probe best parent not updated for RPL_PROBING_EXPIRATION_TIME */
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/* With 50% probability: probe best parent not updated for RPL_PROBING_EXPIRATION_TIME */
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if(probing_target == NULL && (random_rand() % 2) == 0) {
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p = nbr_table_head(rpl_parents);
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while(p != NULL) {
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if(p->dag == dag && p->last_tx_time < min_last_tx) {
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@ -372,8 +372,10 @@ get_probing_target(rpl_dag_t *dag)
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}
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p = nbr_table_next(rpl_parents, p);
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}
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} else {
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/* With 1/2 probability: probe the least recently updated parent */
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}
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/* The default probing target is the least recently updated parent */
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if(probing_target == NULL) {
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p = nbr_table_head(rpl_parents);
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while(p != NULL) {
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if(p->dag == dag) {
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@ -384,7 +386,6 @@ get_probing_target(rpl_dag_t *dag)
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}
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p = nbr_table_next(rpl_parents, p);
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}
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}
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return probing_target;
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