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PPP, PPPoE, improved removal from linked list

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Replaced naive link list removal code to a more clever one.
This commit is contained in:
Sylvain Rochet 2015-02-17 21:32:24 +01:00
parent 4ad60b477c
commit 18074ff98f
1 changed files with 8 additions and 18 deletions
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26
src/netif/ppp/pppoe.c
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@ -300,26 +300,16 @@ static err_t pppoe_link_netif_output_callback(void *pcb, struct pbuf *p, u_short
static err_t
pppoe_destroy(struct pppoe_softc *sc)
{
struct pppoe_softc *cur, *prev = NULL;
/* find previous linked list entry */
for (cur = pppoe_softc_list; cur != NULL; prev = cur, cur = cur->next) {
if (sc == cur) {
break;
}
}
if (cur != sc) {
return ERR_IF;
}
struct pppoe_softc **copp, *freep;
sys_untimeout(pppoe_timeout, sc);
if (prev == NULL) {
/* remove sc from the head of the list */
pppoe_softc_list = sc->next;
} else {
/* remove sc from the list */
prev->next = sc->next;
/* remove interface from list */
for (copp = &pppoe_softc_list; (freep = *copp); copp = &freep->next) {
if (freep == sc) {
*copp = freep->next;
break;
}
}
#ifdef PPPOE_TODO