netif_match
netif_match(0, enaddr);
extern void netif_match(unsigned int tag, uint8_t *macaddr);
void netif_match(unsigned int tag, uint8_t *macaddr);
.netif_match = cs_match,
.netif_match = efinet_match,
val = netif_match(&cur_if, machdep_hint);
int netif_match(struct netif *, void *);
return drv->netif_match(nif, machdep_hint);
int (*netif_match)(struct netif *, void *);
.netif_match = efinet_match,