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Defensive programming: check for the argument being NULL.

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This commit is contained in:
Adam Dunkels 2013-08-12 00:19:12 +02:00 • committed by Simon Duquennoy
parent b42ccaed1b
commit c52fc2fd19
3 changed files with 28 additions and 4 deletions
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10
core/net/uip-ds6-nbr.c
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@ -143,11 +143,13 @@ uip_ds6_nbr_t *
uip_ds6_nbr_lookup(uip_ipaddr_t *ipaddr)
{
uip_ds6_nbr_t *nbr = nbr_table_head(ds6_neighbors);
while(nbr != NULL) {
if(uip_ipaddr_cmp(&nbr->ipaddr, ipaddr)) {
return nbr;
if(ipaddr != NULL) {
while(nbr != NULL) {
if(uip_ipaddr_cmp(&nbr->ipaddr, ipaddr)) {
return nbr;
}
nbr = nbr_table_next(ds6_neighbors, nbr);
}
nbr = nbr_table_next(ds6_neighbors, nbr);
}
return NULL;
}