/*
* Create a clone network interface.
*/
int
if_clone_create(char *name, int len, caddr_t params)
{
struct if_clone *ifc;
char *dp;
int wildcard, bytoff, bitoff;
int unit;
int err;
ifc = if_clone_lookup(name, &unit);
if (ifc == NULL)
return (EINVAL);
ifnet_lock();
if (ifunit(name) != NULL) {
ifnet_unlock();
return (EEXIST);
}
ifnet_unlock();
bytoff = bitoff = 0;
wildcard = (unit < 0);
/*
* Find a free unit if none was given.
*/
if (wildcard) {
while (bytoff < ifc->ifc_bmlen &&
ifc->ifc_units[bytoff] == 0xff)
bytoff++;
if (bytoff >= ifc->ifc_bmlen)
return (ENOSPC);
while ((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0)
bitoff++;
unit = (bytoff << 3) + bitoff;
}
if (unit > ifc->ifc_maxunit)
return (ENXIO);
err = (*ifc->ifc_create)(ifc, unit, params);
if (err != 0)
return (err);
if (!wildcard) {
bytoff = unit >> 3;
bitoff = unit - (bytoff << 3);
}
int
pairioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct pair_softc *sc = (struct pair_softc *)ifp->if_softc;
struct ifreq *ifr = (struct ifreq *)data;
struct if_clone *ifc;
struct pair_softc *pairedsc = ifp->if_softc;
struct ifnet *oldifp = NULL, *newifp = NULL;
int error = 0, unit;
switch (cmd) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
/* FALLTHROUGH */
case SIOCSIFFLAGS:
if (ifp->if_flags & IFF_UP)
ifp->if_flags |= IFF_RUNNING;
else
ifp->if_flags &= ~IFF_RUNNING;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
break;
case SIOCSIFPAIR:
if (sc->sc_pairedif == ifr->ifr_index)
break;
/* Cannot link to myself */
if (ifr->ifr_index == ifp->if_index) {
error = EINVAL;
break;
}
oldifp = if_get(sc->sc_pairedif);
newifp = if_get(ifr->ifr_index);
if (newifp != NULL) {
pairedsc = newifp->if_softc;
if (pairedsc->sc_pairedif != 0) {
error = EBUSY;
break;
}
/* Only allow pair(4) interfaces for the pair */
if ((ifc = if_clone_lookup(newifp->if_xname,
&unit)) == NULL || strcmp("pair",
ifc->ifc_name) != 0) {
error = ENODEV;
break;
}
pairedsc->sc_pairedif = ifp->if_index;
sc->sc_pairedif = ifr->ifr_index;
} else
sc->sc_pairedif = 0;
if (oldifp != NULL) {
pairedsc = oldifp->if_softc;
pairedsc->sc_pairedif = 0;
}
break;
case SIOCGIFPAIR:
ifr->ifr_index = sc->sc_pairedif;
break;
default:
error = ether_ioctl(ifp, &sc->sc_ac, cmd, data);
}
if (newifp != NULL || oldifp != NULL)
pair_link_state(ifp);
if (oldifp != NULL) {
pair_link_state(oldifp);
if_put(oldifp);
}
if (newifp != NULL) {
pair_link_state(newifp);
if_put(newifp);
}
return (error);
}