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Defensive programming: check for the argument being NULL.

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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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18
core/net/rpl/rpl-icmp6.c
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@ -750,9 +750,27 @@ dao_output_target(rpl_parent_t *parent, uip_ipaddr_t *prefix, uint8_t lifetime)
/* Destination Advertisement Object */
if(parent == NULL) {
PRINTF("RPL dao_output_target error parent NULL\n");
return;
}
dag = parent->dag;
if(dag == NULL) {
PRINTF("RPL dao_output_target error dag NULL\n");
return;
}
instance = dag->instance;
if(instance == NULL) {
PRINTF("RPL dao_output_target error instance NULL\n");
return;
}
if(prefix == NULL) {
PRINTF("RPL dao_output_target error prefix NULL\n");
return;
}
#ifdef RPL_DEBUG_DAO_OUTPUT
RPL_DEBUG_DAO_OUTPUT(parent);
#endif