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Safeguard against NULL arguments

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This commit is contained in:
adamdunkels 2011-01-10 15:08:52 +00:00
parent 928cb1fc84
commit 70f9f075a0
1 changed files with 10 additions and 3 deletions
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9
core/net/rime/collect-neighbor.c
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@ -33,7 +33,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: collect-neighbor.c,v 1.9 2011/01/09 21:20:05 adamdunkels Exp $
* $Id: collect-neighbor.c,v 1.10 2011/01/10 15:08:52 adamdunkels Exp $
*/
/**
@ -144,6 +144,11 @@ collect_neighbor_list_add(struct collect_neighbor_list *neighbors_list,
{
struct collect_neighbor *n;
if(addr == NULL) {
PRINTF("collect_neighbor_list_add: attempt to add NULL addr\n");
return 0;
}
PRINTF("collect_neighbor_add: adding %d.%d\n", addr->u8[0], addr->u8[1]);
/* Check if the collect_neighbor is already on the list. */
@ -195,9 +200,11 @@ collect_neighbor_list_add(struct collect_neighbor_list *neighbors_list,
if(nrtmetric < worst_rtmetric) {
n = worst_neighbor;
}
if(n != NULL) {
PRINTF("collect_neighbor_add: not on list, not allocated, recycling %d.%d\n",
n->addr.u8[0], n->addr.u8[1]);
}
}
if(n != NULL) {
n->age = 0;