#include "vlan.h"
#if NVLAN > 0
#include "opt_inet.h"
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#if INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif
SYSCTL_DECL(_net_link);
SYSCTL_NODE(_net_link, IFT_8021_VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN");
SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency");
u_int vlan_proto = ETHERTYPE_VLAN;
SYSCTL_INT(_net_link_vlan_link, VLANCTL_PROTO, proto, CTLFLAG_RW, &vlan_proto,
0, "Ethernet protocol used for VLAN encapsulation");
static struct ifvlan ifv_softc[NVLAN];
static void vlan_start(struct ifnet *ifp);
static void vlan_ifinit(void *foo);
static int vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr);
static int vlan_setmulti(struct ifnet *ifp);
static int vlan_unconfig(struct ifnet *ifp);
static int vlan_config(struct ifvlan *ifv, struct ifnet *p);
static int vlan_setmulti(struct ifnet *ifp)
{
struct ifnet *ifp_p;
struct ifmultiaddr *ifma, *rifma = NULL;
struct ifvlan *sc;
struct vlan_mc_entry *mc = NULL;
struct sockaddr_dl sdl;
int error;
sc = ifp->if_softc;
ifp_p = sc->ifv_p;
sdl.sdl_len = ETHER_ADDR_LEN;
sdl.sdl_family = AF_LINK;
while(sc->vlan_mc_listhead.slh_first != NULL) {
mc = sc->vlan_mc_listhead.slh_first;
bcopy((char *)&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN);
error = if_delmulti(ifp_p, (struct sockaddr *)&sdl);
if (error)
return(error);
SLIST_REMOVE_HEAD(&sc->vlan_mc_listhead, mc_entries);
FREE(mc, M_DEVBUF);
}
for (ifma = ifp->if_multiaddrs.lh_first;
ifma != NULL;ifma = ifma->ifma_link.le_next) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
mc = _MALLOC(sizeof(struct vlan_mc_entry), M_DEVBUF, M_WAITOK);
if (mc == NULL)
return (ENOMEM);
bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
(char *)&mc->mc_addr, ETHER_ADDR_LEN);
SLIST_INSERT_HEAD(&sc->vlan_mc_listhead, mc, mc_entries);
error = if_addmulti(ifp_p, (struct sockaddr *)&sdl, &rifma);
if (error)
return(error);
}
return(0);
}
static void
vlaninit(void *dummy)
{
int i;
for (i = 0; i < NVLAN; i++) {
struct ifnet *ifp = &ifv_softc[i].ifv_if;
ifp->if_softc = &ifv_softc[i];
ifp->if_name = "vlan";
ifp->if_family = APPLE_IF_FAM_VLAN;
ifp->if_unit = i;
ifp->if_linkmib = &ifv_softc[i].ifv_mib;
ifp->if_linkmiblen = sizeof ifv_softc[i].ifv_mib;
ifp->if_init = vlan_ifinit;
ifp->if_start = vlan_start;
ifp->if_ioctl = vlan_ioctl;
ifp->if_output = ether_output;
ifp->if_snd.ifq_maxlen = ifqmaxlen;
if_attach(ifp);
ether_ifattach(ifp);
#if NBPFILTER > 0
bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
ifp->if_data.ifi_type = IFT_8021_VLAN;
ifp->if_data.ifi_hdrlen = EVL_ENCAPLEN;
ifp->if_resolvemulti = 0;
}
}
PSEUDO_SET(vlaninit, if_vlan);
static void
vlan_ifinit(void *foo)
{
return;
}
static void
vlan_start(struct ifnet *ifp)
{
struct ifvlan *ifv;
struct ifnet *p;
struct ether_vlan_header *evl;
struct mbuf *m;
ifv = ifp->if_softc;
p = ifv->ifv_p;
ifp->if_flags |= IFF_OACTIVE;
for (;;) {
IF_DEQUEUE(&ifp->if_snd, m);
if (m == 0)
break;
#if NBPFILTER > 0
if (ifp->if_bpf)
bpf_mtap(ifp, m);
#endif
if (ifp->if_flags & IFF_LINK0) {
m->m_pkthdr.rcvif = ifp;
m->m_flags |= M_PROTO1;
} else {
M_PREPEND(m, EVL_ENCAPLEN, M_DONTWAIT);
if (m == 0)
continue;
bcopy(mtod(m, char *) + EVL_ENCAPLEN, mtod(m, char *),
sizeof(struct ether_header));
evl = mtod(m, struct ether_vlan_header *);
evl->evl_proto = evl->evl_encap_proto;
evl->evl_encap_proto = htons(vlan_proto);
evl->evl_tag = htons(ifv->ifv_tag);
#ifdef DEBUG
printf("vlan_start: %*D\n", sizeof *evl,
(char *)evl, ":");
#endif
}
if (IF_QFULL(&p->if_snd)) {
IF_DROP(&p->if_snd);
ifp->if_oerrors++;
m_freem(m);
continue;
}
IF_ENQUEUE(&p->if_snd, m);
if ((p->if_flags & IFF_OACTIVE) == 0) {
p->if_start(p);
ifp->if_opackets++;
}
}
ifp->if_flags &= ~IFF_OACTIVE;
return;
}
void
vlan_input_tag(struct ether_header *eh, struct mbuf *m, u_int16_t t)
{
int i;
struct ifvlan *ifv;
for (i = 0; i < NVLAN; i++) {
ifv = &ifv_softc[i];
if (ifv->ifv_tag == t)
break;
}
if (i >= NVLAN || (ifv->ifv_if.if_flags & IFF_UP) == 0) {
m_freem(m);
ifv->ifv_p->if_data.ifi_noproto++;
return;
}
m->m_pkthdr.rcvif = &ifv->ifv_if;
#if NBPFILTER > 0
if (ifv->ifv_if.if_bpf) {
struct mbuf m0;
m0.m_next = m;
m0.m_len = sizeof(struct ether_header);
m0.m_data = (char *)eh;
bpf_mtap(&ifv->ifv_if, &m0);
}
#endif
ifv->ifv_if.if_ipackets++;
ether_input(&ifv->ifv_if, eh, m);
return;
}
int
vlan_input(struct ether_header *eh, struct mbuf *m)
{
int i;
struct ifvlan *ifv;
for (i = 0; i < NVLAN; i++) {
ifv = &ifv_softc[i];
if (m->m_pkthdr.rcvif == ifv->ifv_p
&& (EVL_VLANOFTAG(ntohs(*mtod(m, u_int16_t *)))
== ifv->ifv_tag))
break;
}
if (i >= NVLAN || (ifv->ifv_if.if_flags & IFF_UP) == 0) {
m_freem(m);
return -1;
}
m->m_pkthdr.rcvif = &ifv->ifv_if;
eh->ether_type = mtod(m, u_int16_t *)[1];
m->m_data += EVL_ENCAPLEN;
m->m_len -= EVL_ENCAPLEN;
m->m_pkthdr.len -= EVL_ENCAPLEN;
#if NBPFILTER > 0
if (ifv->ifv_if.if_bpf) {
struct mbuf m0;
m0.m_next = m;
m0.m_len = sizeof(struct ether_header);
m0.m_data = (char *)eh;
bpf_mtap(&ifv->ifv_if, &m0);
}
#endif
ifv->ifv_if.if_ipackets++;
ether_input(&ifv->ifv_if, eh, m);
return 0;
}
static int
vlan_config(struct ifvlan *ifv, struct ifnet *p)
{
struct ifaddr *ifa1, *ifa2;
struct sockaddr_dl *sdl1, *sdl2;
if (p->if_data.ifi_type != IFT_ETHER)
return EPROTONOSUPPORT;
if (ifv->ifv_p)
return EBUSY;
ifv->ifv_p = p;
if (p->if_data.ifi_hdrlen == sizeof(struct ether_vlan_header))
ifv->ifv_if.if_mtu = p->if_mtu;
else
ifv->ifv_if.if_mtu = p->if_data.ifi_mtu - EVL_ENCAPLEN;
ifv->ifv_if.if_flags = (p->if_flags & ~(IFF_LINK0));
ifa1 = ifnet_addrs[ifv->ifv_if.if_index - 1];
ifa2 = ifnet_addrs[p->if_index - 1];
sdl1 = (struct sockaddr_dl *)ifa1->ifa_addr;
sdl2 = (struct sockaddr_dl *)ifa2->ifa_addr;
sdl1->sdl_type = IFT_ETHER;
sdl1->sdl_alen = ETHER_ADDR_LEN;
bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN);
bcopy(LLADDR(sdl2), ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN);
return 0;
}
static int
vlan_unconfig(struct ifnet *ifp)
{
struct ifaddr *ifa;
struct sockaddr_dl *sdl;
struct vlan_mc_entry *mc;
struct ifvlan *ifv;
struct ifnet *p;
int error;
ifv = ifp->if_softc;
p = ifv->ifv_p;
while(ifv->vlan_mc_listhead.slh_first != NULL) {
struct sockaddr_dl sdl;
sdl.sdl_len = ETHER_ADDR_LEN;
sdl.sdl_family = AF_LINK;
mc = ifv->vlan_mc_listhead.slh_first;
bcopy((char *)&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN);
error = if_delmulti(p, (struct sockaddr *)&sdl);
error = if_delmulti(ifp, (struct sockaddr *)&sdl);
if (error)
return(error);
SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries);
FREE(mc, M_DEVBUF);
}
ifv->ifv_p = NULL;
ifv->ifv_if.if_mtu = ETHERMTU;
ifa = ifnet_addrs[ifv->ifv_if.if_index - 1];
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
sdl->sdl_type = IFT_ETHER;
sdl->sdl_alen = ETHER_ADDR_LEN;
bzero(LLADDR(sdl), ETHER_ADDR_LEN);
bzero(ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN);
return 0;
}
static int
vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ifaddr *ifa;
struct ifnet *p;
struct ifreq *ifr;
struct ifvlan *ifv;
struct vlanreq vlr;
int error = 0;
ifr = (struct ifreq *)data;
ifa = (struct ifaddr *)data;
ifv = ifp->if_softc;
switch (cmd) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#if INET
case AF_INET:
arp_ifinit(&ifv->ifv_ac, ifa);
break;
#endif
default:
break;
}
break;
case SIOCGIFADDR:
{
struct sockaddr *sa;
sa = (struct sockaddr *) &ifr->ifr_data;
bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr,
(caddr_t) sa->sa_data, ETHER_ADDR_LEN);
}
break;
case SIOCSIFMTU:
if (ifr->ifr_mtu > ETHERMTU) {
error = EINVAL;
} else {
ifp->if_mtu = ifr->ifr_mtu;
}
break;
case SIOCSETVLAN:
error = copyin(ifr->ifr_data, &vlr, sizeof vlr);
if (error)
break;
if (vlr.vlr_parent[0] == '\0') {
vlan_unconfig(ifp);
if_down(ifp);
ifp->if_flags = 0;
break;
}
p = ifunit(vlr.vlr_parent);
if (p == 0) {
error = ENOENT;
break;
}
error = vlan_config(ifv, p);
if (error)
break;
ifv->ifv_tag = vlr.vlr_tag;
break;
case SIOCGETVLAN:
bzero(&vlr, sizeof vlr);
if (ifv->ifv_p) {
snprintf(vlr.vlr_parent, sizeof(vlr.vlr_parent),
"%s%d", ifv->ifv_p->if_name, ifv->ifv_p->if_unit);
vlr.vlr_tag = ifv->ifv_tag;
}
error = copyout(&vlr, ifr->ifr_data, sizeof vlr);
break;
case SIOCSIFFLAGS:
if (ifr->ifr_flags & (IFF_PROMISC)) {
ifp->if_flags &= ~(IFF_PROMISC);
error = EINVAL;
}
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
error = vlan_setmulti(ifp);
break;
default:
error = EINVAL;
}
return error;
}
#endif