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/* $OpenBSD: if_vether.c,v 1.29 2017/01/22 10:17:39 dlg Exp $ */
/*
* Copyright (c) 2009 Theo de Raadt
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <net/if_media.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include "bpfilter.h"
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
void vetherattach(int);
int vetherioctl(struct ifnet *, u_long, caddr_t);
void vetherstart(struct ifnet *);
int vether_clone_create(struct if_clone *, int);
int vether_clone_destroy(struct ifnet *);
int vether_media_change(struct ifnet *);
void vether_media_status(struct ifnet *, struct ifmediareq *);
struct vether_softc {
struct arpcom sc_ac;
struct ifmedia sc_media;
};
struct if_clone vether_cloner =
IF_CLONE_INITIALIZER("vether", vether_clone_create, vether_clone_destroy);
int
vether_media_change(struct ifnet *ifp)
{
return (0);
}
void
vether_media_status(struct ifnet *ifp, struct ifmediareq *imr)
{
imr->ifm_active = IFM_ETHER | IFM_AUTO;
imr->ifm_status = IFM_AVALID | IFM_ACTIVE;
}
void
vetherattach(int nvether)
{
if_clone_attach(&vether_cloner);
}
int
vether_clone_create(struct if_clone *ifc, int unit)
{
struct ifnet *ifp;
struct vether_softc *sc;
if ((sc = malloc(sizeof(*sc),
M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL)
return (ENOMEM);
ifp = &sc->sc_ac.ac_if;
snprintf(ifp->if_xname, sizeof ifp->if_xname, "vether%d", unit);
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ether_fakeaddr(ifp);
ifp->if_softc = sc;
ifp->if_ioctl = vetherioctl;
ifp->if_start = vetherstart;
IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
ifp->if_hardmtu = ETHER_MAX_HARDMTU_LEN;
ifp->if_capabilities = IFCAP_VLAN_MTU;
ifmedia_init(&sc->sc_media, 0, vether_media_change,
vether_media_status);
ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL);
ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO);
if_attach(ifp);
ether_ifattach(ifp);
return (0);
}
int
vether_clone_destroy(struct ifnet *ifp)
{
struct vether_softc *sc = ifp->if_softc;
ifmedia_delete_instance(&sc->sc_media, IFM_INST_ANY);
ether_ifdetach(ifp);
if_detach(ifp);
free(sc, M_DEVBUF, sizeof(*sc));
return (0);
}
/*
* The bridge has magically already done all the work for us,
* and we only need to discard the packets.
*/
void
vetherstart(struct ifnet *ifp)
{
struct mbuf *m;
for (;;) {
IFQ_DEQUEUE(&ifp->if_snd, m);
if (m == NULL)
return;
#if NBPFILTER > 0
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_OUT);
#endif /* NBPFILTER > 0 */
m_freem(m);
}
}
int
vetherioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct vether_softc *sc = (struct vether_softc *)ifp->if_softc;
struct ifreq *ifr = (struct ifreq *)data;
int error = 0, link_state;
switch (cmd) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
/* FALLTHROUGH */
case SIOCSIFFLAGS:
if (ifp->if_flags & IFF_UP) {
ifp->if_flags |= IFF_RUNNING;
link_state = LINK_STATE_UP;
} else {
ifp->if_flags &= ~IFF_RUNNING;
link_state = LINK_STATE_DOWN;
}
if (ifp->if_link_state != link_state) {
ifp->if_link_state = link_state;
if_link_state_change(ifp);
}
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
break;
default:
error = ether_ioctl(ifp, &sc->sc_ac, cmd, data);
}
return (error);
}
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