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fixed so that DAO NACK now is either for the path or for RPL root - if from root then do not try to switch parent since that will not help

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This commit is contained in:
Joakim Eriksson 2015-09-23 09:12:35 +02:00
parent dae21fcb76
commit 8afe3fb9b7
3 changed files with 12 additions and 4 deletions
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6
core/net/rpl/rpl-icmp6.c
View File

@ -663,6 +663,7 @@ dao_input(void)
int learned_from;
rpl_parent_t *parent;
uip_ds6_nbr_t *nbr;
int is_root;
prefixlen = 0;
parent = NULL;
@ -695,6 +696,8 @@ dao_input(void)
sequence = buffer[pos++];
dag = instance->current_dag;
is_root = (dag->rank == ROOT_RANK(instance));
/* Is the DAG ID present? */
if(flags & RPL_DAO_D_FLAG) {
if(memcmp(&dag->dag_id, &buffer[pos], sizeof(dag->dag_id))) {
@ -829,6 +832,7 @@ dao_input(void)
if(flags & RPL_DAO_K_FLAG) {
/* signal the failure to add the node */
dao_ack_output(instance, &dao_sender_addr, sequence,
is_root ? RPL_DAO_ACK_UNABLE_TO_ACCEPT_ROOT :
RPL_DAO_ACK_UNABLE_TO_ACCEPT);
}
goto discard;
@ -838,10 +842,10 @@ dao_input(void)
if(rep == NULL) {
RPL_STAT(rpl_stats.mem_overflows++);
PRINTF("RPL: Could not add a route after receiving a DAO\n");
if(flags & RPL_DAO_K_FLAG) {
/* signal the failure to add the node */
dao_ack_output(instance, &dao_sender_addr, sequence,
is_root ? RPL_DAO_ACK_UNABLE_TO_ACCEPT_ROOT :
RPL_DAO_ACK_UNABLE_TO_ACCEPT);
}
goto discard;

5
core/net/rpl/rpl-mrhof.c
View File

@ -122,8 +122,11 @@ reset(rpl_dag_t *dag)
static void
dao_ack_callback(rpl_parent_t *p, int status)
{
if(status == RPL_DAO_ACK_UNABLE_TO_ACCEPT_ROOT) {
return;
}
/* here we need to handle failed DAO's and other stuff */
PRINTF("RPL: MRHOF - DAO ACK received with status: %d", status);
PRINTF("RPL: MRHOF - DAO ACK received with status: %d\n", status);
if(status >= RPL_DAO_ACK_UNABLE_TO_ACCEPT) {
/* punish the ETX as if this was 10 packets lost */
neighbor_link_callback(p, MAC_TX_OK, 10);

1
core/net/rpl/rpl-private.h
View File

@ -94,6 +94,7 @@
#define RPL_DAO_ACK_UNCONDITIONAL_ACCEPT 0
#define RPL_DAO_ACK_ACCEPT 1 /* 1 - 127 is OK but not good */
#define RPL_DAO_ACK_UNABLE_TO_ACCEPT 128 /* >127 is fail */
#define RPL_DAO_ACK_UNABLE_TO_ACCEPT_ROOT 255 /* root can not accept */
#define RPL_DAO_ACK_TIMEOUT -1