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added error check for extraction of aligned llao

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This commit is contained in:
Joakim Eriksson 2016-03-04 14:20:23 +01:00
parent e9e31e9fd1
commit 186138f6af
2 changed files with 14 additions and 25 deletions
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36
core/net/ipv6/uip-nd6.c
View file

@ -135,11 +135,13 @@ static uip_ds6_prefix_t *prefix; /** Pointer to a prefix list entry */
#if UIP_ND6_SEND_NA || UIP_ND6_SEND_RA || !UIP_CONF_ROUTER
/*------------------------------------------------------------------*/
/* Copy link-layer address from LLAO option to a word-aligned uip_lladdr_t */
static void
static int
extract_lladdr_from_llao_aligned(uip_lladdr_t *dest) {
if(dest != NULL && nd6_opt_llao != NULL) {
memcpy(dest, &nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], UIP_LLADDR_LEN);
return 1;
}
return 0;
}
#endif /* UIP_ND6_SEND_NA || UIP_ND6_SEND_RA || !UIP_CONF_ROUTER */
/*------------------------------------------------------------------*/
@ -203,14 +205,8 @@ ns_input(void)
extract_lladdr_from_llao_aligned(&lladdr_aligned);
nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr);
if(nbr == NULL) {
<<<<<<< 2e852f758b3fbc18ad30ec75d8c62b5d5238e70a
uip_lladdr_t lladdr_aligned;
extract_lladdr_aligned(&lladdr_aligned);
uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, &lladdr_aligned,
0, NBR_STALE, NBR_TABLE_REASON_IPV6_ND, NULL);
=======
uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, &lladdr_aligned, 0, NBR_STALE);
>>>>>>> replaced add/remove ds6-nbr with an nbr-module controlled update of lladdress to avoid loss of other state information
} else {
const uip_lladdr_t *lladdr = uip_ds6_nbr_get_ll(nbr);
if(lladdr == NULL) {
@ -440,6 +436,7 @@ na_input(void)
uint8_t is_router;
uint8_t is_solicited;
uint8_t is_override;
uip_lladdr_t lladdr_aligned;
PRINTF("Received NA from ");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
@ -517,12 +514,9 @@ na_input(void)
UIP_LLADDR_LEN);
}
if(nbr->state == NBR_INCOMPLETE) {
uip_lladdr_t lladdr_aligned;
if(nd6_opt_llao == NULL) {
if(nd6_opt_llao == NULL || !extract_lladdr_from_llao_aligned(&lladdr_aligned)) {
goto discard;
}
extract_lladdr_from_llao_aligned(&lladdr_aligned);
if(nbr_table_update_lladdr((const linkaddr_t *)lladdr, (const linkaddr_t *)&lladdr_aligned, 1) == 0) {
/* failed to update the lladdr */
goto discard;
@ -552,9 +546,8 @@ na_input(void)
*/
if(is_override || !is_llchange || nd6_opt_llao == NULL) {
if(nd6_opt_llao != NULL && is_llchange) {
uip_lladdr_t lladdr_aligned;
extract_lladdr_from_llao_aligned(&lladdr_aligned);
if(nbr_table_update_lladdr((const linkaddr_t *) lladdr, (const linkaddr_t *) &lladdr_aligned, 1) == 0) {
if(!extract_lladdr_from_llao_aligned(&lladdr_aligned) ||
nbr_table_update_lladdr((const linkaddr_t *) lladdr, (const linkaddr_t *) &lladdr_aligned, 1) == 0) {
/* failed to update the lladdr */
goto discard;
}
@ -854,6 +847,8 @@ uip_nd6_rs_output(void)
void
ra_input(void)
{
uip_lladdr_t lladdr_aligned;
PRINTF("Received RA from ");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF(" to ");
@ -898,19 +893,14 @@ ra_input(void)
PRINTF("Processing SLLAO option in RA\n");
nd6_opt_llao = (uint8_t *) UIP_ND6_OPT_HDR_BUF;
nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr);
if(!extract_lladdr_from_llao_aligned(&lladdr_aligned)) {
/* failed to extract llao - discard packet */
goto discard;
}
if(nbr == NULL) {
uip_lladdr_t lladdr_aligned;
<<<<<<< 2e852f758b3fbc18ad30ec75d8c62b5d5238e70a
extract_lladdr_aligned(&lladdr_aligned);
nbr = uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, &lladdr_aligned,
1, NBR_STALE, NBR_TABLE_REASON_IPV6_ND, NULL);
=======
extract_lladdr_from_llao_aligned(&lladdr_aligned);
nbr = uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, &lladdr_aligned, 1, NBR_STALE);
>>>>>>> replaced add/remove ds6-nbr with an nbr-module controlled update of lladdress to avoid loss of other state information
} else {
uip_lladdr_t lladdr_aligned;
extract_lladdr_from_llao_aligned(&lladdr_aligned);
const uip_lladdr_t *lladdr = uip_ds6_nbr_get_ll(nbr);
if(lladdr == NULL) {
goto discard;

3
core/net/nbr-table.c
View file

@ -195,9 +195,8 @@ remove_key(nbr_table_key_t *least_used_key)
used_map[index_from_key(least_used_key)] = 0;
/* Remove neighbor from list */
list_remove(nbr_table_keys, least_used_key);
/* Return associated key */
}
/*---------------------------------------------------------------------------*/
static nbr_table_key_t *
nbr_table_allocate(nbr_table_reason_t reason, void *data)
{