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ng_netif: don't add duplicates

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prevent ng_netif_add() from adding duplicates as described in https://github.com/RIOT-OS/RIOT/issues/2965
This commit is contained in:
Lotte Steenbrink 2015-05-19 08:56:11 -07:00
parent 5b5ff5832c
commit 487064e51a
1 changed files with 16 additions and 10 deletions
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20
sys/net/crosslayer/ng_netif/ng_netif.c
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@ -44,22 +44,28 @@ void ng_netif_init(void)
int ng_netif_add(kernel_pid_t pid)
{
kernel_pid_t *free_entry = NULL;
for (int i = 0; i < NG_NETIF_NUMOF; i++) {
if (ifs[i] == pid) { /* avoid duplicates */
if (ifs[i] == pid) {
return 0;
}
else if (ifs[i] == KERNEL_PID_UNDEF) {
ifs[i] = pid;
else if (ifs[i] == KERNEL_PID_UNDEF && !free_entry) {
free_entry = &ifs[i];
}
}
if (!free_entry) {
return -ENOMEM;
}
*free_entry = pid;
for (int j = 0; if_handler[j].add != NULL; j++) {
if_handler[j].add(pid);
}
return 0;
}
}
return -ENOMEM;
}
void ng_netif_remove(kernel_pid_t pid)