Function ifhwioctl

freebsd/net/if.c:2461–2887

* Hardware specific interface ioctls. */

 * Hardware specific interface ioctls.
 */
int
ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
{
	struct ifreq *ifr;
	int error = 0, do_ifup = 0;
	int new_flags, temp_flags;
	size_t namelen, onamelen;
	size_t descrlen;
	char *descrbuf, *odescrbuf;
	char new_name[IFNAMSIZ];
	struct ifaddr *ifa;
	struct sockaddr_dl *sdl;

	ifr = (struct ifreq *)data;
	switch (cmd) {
	case SIOCGIFINDEX:
		ifr->ifr_index = ifp->if_index;
		break;

	case SIOCGIFFLAGS:
		temp_flags = ifp->if_flags | ifp->if_drv_flags;
		ifr->ifr_flags = temp_flags & 0xffff;
		ifr->ifr_flagshigh = temp_flags >> 16;
		break;

	case SIOCGIFCAP:
		ifr->ifr_reqcap = ifp->if_capabilities;
		ifr->ifr_curcap = ifp->if_capenable;
		break;

	case SIOCGIFDATA:
	{
		struct if_data ifd;

		/* Ensure uninitialised padding is not leaked. */
		memset(&ifd, 0, sizeof(ifd));

		if_data_copy(ifp, &ifd);
		error = copyout(&ifd, ifr_data_get_ptr(ifr), sizeof(ifd));
		break;
	}

#ifdef MAC
	case SIOCGIFMAC:
		error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
		break;
#endif

	case SIOCGIFMETRIC:
		ifr->ifr_metric = ifp->if_metric;
		break;

	case SIOCGIFMTU:
		ifr->ifr_mtu = ifp->if_mtu;
		break;

	case SIOCGIFPHYS:
		/* XXXGL: did this ever worked? */