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fixed bug #45353: IPv6 router / neighbor relationship is not always consistent - patch by Stian Sebastian Skjelstad

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This commit is contained in:
sg 2016-03-06 14:48:41 +01:00
parent 375ec36246
commit f5fef6eebc
1 changed files with 8 additions and 2 deletions
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10
src/core/ipv6/nd6.c
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@ -653,7 +653,8 @@ nd6_tmr(void)
for (i = 0; i < LWIP_ND6_NUM_NEIGHBORS; i++) {
switch (neighbor_cache[i].state) {
case ND6_INCOMPLETE:
if (neighbor_cache[i].counter.probes_sent >= LWIP_ND6_MAX_MULTICAST_SOLICIT) {
if ((neighbor_cache[i].counter.probes_sent >= LWIP_ND6_MAX_MULTICAST_SOLICIT) &&
(!neighbor_cache[i].isrouter)) {
/* Retries exceeded. */
nd6_free_neighbor_cache_entry(i);
} else {
@ -688,7 +689,8 @@ nd6_tmr(void)
}
break;
case ND6_PROBE:
if (neighbor_cache[i].counter.probes_sent >= LWIP_ND6_MAX_MULTICAST_SOLICIT) {
if ((neighbor_cache[i].counter.probes_sent >= LWIP_ND6_MAX_MULTICAST_SOLICIT) &&
(!neighbor_cache[i].isrouter)) {
/* Retries exceeded. */
nd6_free_neighbor_cache_entry(i);
} else {
@ -1177,6 +1179,10 @@ nd6_free_neighbor_cache_entry(s8_t i)
if ((i < 0) || (i >= LWIP_ND6_NUM_NEIGHBORS)) {
return;
}
if (neighbor_cache[i].isrouter) {
/* isrouter needs to be cleared before deleting a neighbor cache entry */
return;
}
/* Free any queued packets. */
if (neighbor_cache[i].q != NULL) {