Function ifunit_ref

freebsd/net/if.c:2356–2372

* Map interface name to interface structure pointer, with or without * returning a reference. */

 * returning a reference.
 */
struct ifnet *
ifunit_ref(const char *name)
{
	struct epoch_tracker et;
	struct ifnet *ifp;

	NET_EPOCH_ENTER(et);
	CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
		if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
		    !(ifp->if_flags & IFF_DYING))
			break;
	}
	if (ifp != NULL)
		if_ref(ifp);
	NET_EPOCH_EXIT(et);
	return (ifp);
}

struct ifnet *
ifunit(const char *name)