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ND6: make sure the second parameter of uip_ds6_nbr_add is word-aligned, which is required as the parameter is directly accessed as uip_lladdr_t* (not as a byte array)

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This commit is contained in:
Simon Duquennoy 2015-08-20 16:48:11 +02:00
parent 63bb46f01b
commit 04106a0d53
1 changed files with 18 additions and 13 deletions
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29
core/net/ipv6/uip-nd6.c
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@ -189,15 +189,16 @@ ns_input(void)
#endif /*UIP_CONF_IPV6_CHECKS */ #endif /*UIP_CONF_IPV6_CHECKS */
nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr); nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr);
if(nbr == NULL) { if(nbr == NULL) {
uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, /* Copy link address to a uip_lladdr_t first
(uip_lladdr_t *)&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], * to ensure the second argument to uip_ds6_nbr_add is word-aligned */
0, NBR_STALE); uip_lladdr_t lladdr;
memcpy(&lladdr, &nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], UIP_LLADDR_LEN);
uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, &lladdr, 0, NBR_STALE);
} else { } else {
uip_lladdr_t *lladdr = (uip_lladdr_t *)uip_ds6_nbr_get_ll(nbr); uip_lladdr_t *lladdr = (uip_lladdr_t *)uip_ds6_nbr_get_ll(nbr);
if(memcmp(&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], if(memcmp(&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
lladdr, UIP_LLADDR_LEN) != 0) { lladdr, UIP_LLADDR_LEN) != 0) {
memcpy(lladdr, &nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], memcpy(lladdr, &nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], UIP_LLADDR_LEN);
UIP_LLADDR_LEN);
nbr->state = NBR_STALE; nbr->state = NBR_STALE;
} else { } else {
if(nbr->state == NBR_INCOMPLETE) { if(nbr->state == NBR_INCOMPLETE) {
@ -619,18 +620,20 @@ rs_input(void)
goto discard; goto discard;
} else { } else {
#endif /*UIP_CONF_IPV6_CHECKS */ #endif /*UIP_CONF_IPV6_CHECKS */
/* Copy link address to a uip_lladdr_t first
* to ensure the second argument to uip_ds6_nbr_add is word-aligned */
uip_lladdr_t lladdr;
memcpy(&lladdr, &nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], UIP_LLADDR_LEN);
if((nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr)) == NULL) { if((nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr)) == NULL) {
/* we need to add the neighbor */ /* we need to add the neighbor */
uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, &lladdr, 0, NBR_STALE);
(uip_lladdr_t *)&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], 0, NBR_STALE);
} else { } else {
/* If LL address changed, set neighbor state to stale */ /* If LL address changed, set neighbor state to stale */
if(memcmp(&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], if(memcmp(&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
uip_ds6_nbr_get_ll(nbr), UIP_LLADDR_LEN) != 0) { uip_ds6_nbr_get_ll(nbr), UIP_LLADDR_LEN) != 0) {
uip_ds6_nbr_t nbr_data = *nbr; uip_ds6_nbr_t nbr_data = *nbr;
uip_ds6_nbr_rm(nbr); uip_ds6_nbr_rm(nbr);
nbr = uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, nbr = uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, &lladdr, 0, NBR_STALE);
(uip_lladdr_t *)&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], 0, NBR_STALE);
nbr->reachable = nbr_data.reachable; nbr->reachable = nbr_data.reachable;
nbr->sendns = nbr_data.sendns; nbr->sendns = nbr_data.sendns;
nbr->nscount = nbr_data.nscount; nbr->nscount = nbr_data.nscount;
@ -859,9 +862,11 @@ ra_input(void)
nd6_opt_llao = (uint8_t *) UIP_ND6_OPT_HDR_BUF; nd6_opt_llao = (uint8_t *) UIP_ND6_OPT_HDR_BUF;
nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr); nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr);
if(nbr == NULL) { if(nbr == NULL) {
nbr = uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, /* Copy link address to a uip_lladdr_t first
(uip_lladdr_t *)&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], * to ensure the second argument to uip_ds6_nbr_add is word-aligned */
1, NBR_STALE); uip_lladdr_t lladdr;
memcpy(&lladdr, &nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], UIP_LLADDR_LEN);
nbr = uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, &lladdr, 1, NBR_STALE);
} else { } else {
uip_lladdr_t *lladdr = (uip_lladdr_t *)uip_ds6_nbr_get_ll(nbr); uip_lladdr_t *lladdr = (uip_lladdr_t *)uip_ds6_nbr_get_ll(nbr);
if(nbr->state == NBR_INCOMPLETE) { if(nbr->state == NBR_INCOMPLETE) {