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No-Path DAO Propagation

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This commit is contained in:
Sébastien Dawans 2013-07-25 10:39:39 +02:00
parent 4108066f0a
commit c4a121bf18
3 changed files with 33 additions and 10 deletions
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14
core/net/rpl/rpl.c
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@ -63,6 +63,8 @@ void
rpl_purge_routes(void)
{
uip_ds6_route_t *r;
uip_ipaddr_t prefix;
rpl_dag_t *dag;
/* First pass, decrement lifetime */
r = uip_ds6_route_list_head();
@ -86,8 +88,20 @@ rpl_purge_routes(void)
if(r->state.lifetime < 1) {
/* Routes with lifetime == 1 have only just been decremented from 2 to 1,
* thus we want to keep them. Hence < and not <= */
uip_ipaddr_copy(&prefix, &r->ipaddr);
uip_ds6_route_rm(r);
r = uip_ds6_route_list_head();
PRINTF("No more routes to ");
PRINT6ADDR(&prefix);
dag = default_instance->current_dag;
/* Propagate this information with a No-Path DAO to preferred parent if we are not a RPL Root */
if(dag->rank != ROOT_RANK(default_instance)) {
PRINTF(" -> generate No-Path DAO\n");
dao_output_target(dag->preferred_parent, &prefix, RPL_ZERO_LIFETIME);
/* Don't schedule more than 1 No-Path DAO, let next iteration handle that */
return;
}
PRINTF("\n");
} else {
r = list_item_next(r);
}