ifioctl
TULIP_PERFSTART(ifioctl)
TULIP_PERFEND(ifioctl);
return ifioctl(so, cmd, data, p);
int ifioctl(struct socket *, u_long, caddr_t, struct proc *);
error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)&ireq, procp);
error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)&ireq, procp);
error = ifioctl(so, SIOCAIFADDR, (caddr_t)&ifra, procp);