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netif_add: check that the new netif is not already added

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goldsimon 2018-03-21 09:32:39 +01:00
parent 600527dde7
commit c881c48eed
1 changed files with 1 additions and 0 deletions
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src/core/netif.c
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@ -379,6 +379,7 @@ netif_add(struct netif *netif,
}
num_netifs = 0;
for (netif2 = netif_list; netif2 != NULL; netif2 = netif2->next) {
LWIP_ASSERT("netif already added", netif2 != netif);
num_netifs++;
LWIP_ASSERT("too many netifs, max. supported number is 255", num_netifs <= 255);
if (netif2->num == netif->num) {