#if defined(__FreeBSD__) && __FreeBSD__ >= 3
#include "opt_inet.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/errno.h>
#if !defined(__FreeBSD__) || __FreeBSD__ < 3
#include <sys/ioctl.h>
#endif
#include <sys/malloc.h>
#include <sys/protosw.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#if INET
#include <netinet/ip.h>
#endif
#include <netinet/ip_encap.h>
#if INET6
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/in6_gif.h>
#include <netinet6/in6_var.h>
#include <netinet6/ip6protosw.h>
#endif
#include <netinet/ip_ecn.h>
#include <net/if_gif.h>
#include <net/net_osdep.h>
#if INET6
extern struct ip6protosw in6_gif_protosw;
#endif
int
in6_gif_output(ifp, family, m, rt)
struct ifnet *ifp;
int family;
struct mbuf *m;
struct rtentry *rt;
{
struct gif_softc *sc = (struct gif_softc*)ifp;
struct sockaddr_in6 *dst = (struct sockaddr_in6 *)&sc->gif_ro6.ro_dst;
struct sockaddr_in6 *sin6_src = (struct sockaddr_in6 *)sc->gif_psrc;
struct sockaddr_in6 *sin6_dst = (struct sockaddr_in6 *)sc->gif_pdst;
struct ip6_hdr *ip6;
int proto;
u_int8_t itos, otos;
if (sin6_src == NULL || sin6_dst == NULL ||
sin6_src->sin6_family != AF_INET6 ||
sin6_dst->sin6_family != AF_INET6) {
m_freem(m);
return EAFNOSUPPORT;
}
switch (family) {
#if INET
case AF_INET:
{
struct ip *ip;
proto = IPPROTO_IPV4;
if (m->m_len < sizeof(*ip)) {
m = m_pullup(m, sizeof(*ip));
if (!m)
return ENOBUFS;
}
ip = mtod(m, struct ip *);
itos = ip->ip_tos;
break;
}
#endif
#if INET6
case AF_INET6:
{
struct ip6_hdr *ip6;
proto = IPPROTO_IPV6;
if (m->m_len < sizeof(*ip6)) {
m = m_pullup(m, sizeof(*ip6));
if (!m)
return ENOBUFS;
}
ip6 = mtod(m, struct ip6_hdr *);
itos = (ntohl(ip6->ip6_flow) >> 20) & 0xff;
break;
}
#endif
default:
#if DEBUG
printf("in6_gif_output: warning: unknown family %d passed\n",
family);
#endif
m_freem(m);
return EAFNOSUPPORT;
}
M_PREPEND(m, sizeof(struct ip6_hdr), M_DONTWAIT);
if (m && m->m_len < sizeof(struct ip6_hdr))
m = m_pullup(m, sizeof(struct ip6_hdr));
if (m == NULL) {
printf("ENOBUFS in in6_gif_output %d\n", __LINE__);
return ENOBUFS;
}
ip6 = mtod(m, struct ip6_hdr *);
ip6->ip6_flow = 0;
ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
ip6->ip6_vfc |= IPV6_VERSION;
ip6->ip6_plen = htons((u_short)m->m_pkthdr.len);
ip6->ip6_nxt = proto;
ip6->ip6_hlim = ip6_gif_hlim;
ip6->ip6_src = sin6_src->sin6_addr;
if (ifp->if_flags & IFF_LINK0) {
if (!IN6_IS_ADDR_UNSPECIFIED(&sin6_dst->sin6_addr))
ip6->ip6_dst = sin6_dst->sin6_addr;
else if (rt) {
if (family != AF_INET6) {
m_freem(m);
return EINVAL;
}
ip6->ip6_dst = ((struct sockaddr_in6 *)(rt->rt_gateway))->sin6_addr;
} else {
m_freem(m);
return ENETUNREACH;
}
} else {
if (!IN6_IS_ADDR_UNSPECIFIED(&sin6_dst->sin6_addr))
ip6->ip6_dst = sin6_dst->sin6_addr;
else {
m_freem(m);
return ENETUNREACH;
}
}
if (ifp->if_flags & IFF_LINK1) {
otos = 0;
ip_ecn_ingress(ECN_ALLOWED, &otos, &itos);
ip6->ip6_flow |= htonl((u_int32_t)otos << 20);
}
if (dst->sin6_family != sin6_dst->sin6_family ||
!IN6_ARE_ADDR_EQUAL(&dst->sin6_addr, &sin6_dst->sin6_addr)) {
bzero(dst, sizeof(*dst));
dst->sin6_family = sin6_dst->sin6_family;
dst->sin6_len = sizeof(struct sockaddr_in6);
dst->sin6_addr = sin6_dst->sin6_addr;
if (sc->gif_ro6.ro_rt) {
RTFREE(sc->gif_ro6.ro_rt);
sc->gif_ro6.ro_rt = NULL;
}
#if 0
sc->gif_if.if_mtu = GIF_MTU;
#endif
}
if (sc->gif_ro6.ro_rt == NULL) {
rtalloc((struct route *)&sc->gif_ro6);
if (sc->gif_ro6.ro_rt == NULL) {
m_freem(m);
return ENETUNREACH;
}
#if 0
ifp->if_mtu = sc->gif_ro6.ro_rt->rt_ifp->if_mtu
- sizeof(struct ip6_hdr);
#endif
}
return(ip6_output(m, 0, &sc->gif_ro6, 0, 0, NULL));
}
int in6_gif_input(mp, offp, proto)
struct mbuf **mp;
int *offp, proto;
{
struct mbuf *m = *mp;
#if 0
struct gif_softc *sc;
#endif
struct ifnet *gifp = NULL;
struct ip6_hdr *ip6;
#if 0
int i;
#endif
int af = 0;
u_int32_t otos;
ip6 = mtod(m, struct ip6_hdr *);
#if 0
#define satoin6(sa) (((struct sockaddr_in6 *)(sa))->sin6_addr)
for (i = 0, sc = gif; i < ngif; i++, sc++) {
if (sc->gif_psrc == NULL ||
sc->gif_pdst == NULL ||
sc->gif_psrc->sa_family != AF_INET6 ||
sc->gif_pdst->sa_family != AF_INET6) {
continue;
}
if ((sc->gif_if.if_flags & IFF_UP) == 0)
continue;
if ((sc->gif_if.if_flags & IFF_LINK0) &&
IN6_ARE_ADDR_EQUAL(&satoin6(sc->gif_psrc), &ip6->ip6_dst) &&
IN6_IS_ADDR_UNSPECIFIED(&satoin6(sc->gif_pdst))) {
gifp = &sc->gif_if;
continue;
}
if (IN6_ARE_ADDR_EQUAL(&satoin6(sc->gif_psrc), &ip6->ip6_dst) &&
IN6_ARE_ADDR_EQUAL(&satoin6(sc->gif_pdst), &ip6->ip6_src)) {
gifp = &sc->gif_if;
break;
}
}
#else
gifp = (struct ifnet *)encap_getarg(m);
#endif
if (gifp == NULL) {
m_freem(m);
ip6stat.ip6s_nogif++;
return IPPROTO_DONE;
}
if ((gifp->if_flags & IFF_UP) == 0) {
m_freem(m);
ip6stat.ip6s_nogif++;
return IPPROTO_DONE;
}
otos = ip6->ip6_flow;
m_adj(m, *offp);
switch (proto) {
#if INET
case IPPROTO_IPV4:
{
struct ip *ip;
u_int8_t otos8;
af = AF_INET;
otos8 = (ntohl(otos) >> 20) & 0xff;
if (m->m_len < sizeof(*ip)) {
m = m_pullup(m, sizeof(*ip));
if (!m)
return IPPROTO_DONE;
}
ip = mtod(m, struct ip *);
if (gifp->if_flags & IFF_LINK1)
ip_ecn_egress(ECN_ALLOWED, &otos8, &ip->ip_tos);
break;
}
#endif
#if INET6
case IPPROTO_IPV6:
{
struct ip6_hdr *ip6;
af = AF_INET6;
if (m->m_len < sizeof(*ip6)) {
m = m_pullup(m, sizeof(*ip6));
if (!m)
return IPPROTO_DONE;
}
ip6 = mtod(m, struct ip6_hdr *);
if (gifp->if_flags & IFF_LINK1)
ip6_ecn_egress(ECN_ALLOWED, &otos, &ip6->ip6_flow);
break;
}
#endif
default:
ip6stat.ip6s_nogif++;
m_freem(m);
return IPPROTO_DONE;
}
gif_input(m, af, gifp);
return IPPROTO_DONE;
}
int
in6_gif_ioctl(ifp, cmd, data)
struct ifnet *ifp;
#if defined(__FreeBSD__) && __FreeBSD__ < 3
int cmd;
#else
u_long cmd;
#endif
caddr_t data;
{
struct gif_softc *sc = (struct gif_softc*)ifp;
struct ifreq *ifr = (struct ifreq*)data;
int error = 0, size;
struct sockaddr *sa, *dst, *src;
const struct encaptab *p;
struct sockaddr_in6 smask6, dmask6;
switch (cmd) {
case SIOCSIFFLAGS:
if (((ifp->if_flags ^ sc->gif_oflags) & IFF_LINK0) == 0)
break;
if (sc->gif_psrc == NULL || sc->gif_pdst == NULL ||
sc->gif_psrc->sa_family != sc->gif_pdst->sa_family)
break;
bzero(&smask6, sizeof(smask6));
smask6.sin6_addr.s6_addr32[0] = ~0;
smask6.sin6_addr.s6_addr32[1] = ~0;
smask6.sin6_addr.s6_addr32[2] = ~0;
smask6.sin6_addr.s6_addr32[3] = ~0;
#if 0
smask6.sin6_scope_id = ~0;
#endif
dmask6 = smask6;
if ((ifp->if_flags & IFF_LINK0) == 0 &&
IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)dst)->sin6_addr)) {
bzero(&dmask6, sizeof(dmask6));
#if 0
dmask6.sin6_scope_id = ~0;
#endif
}
p = encap_attach(sc->gif_psrc->sa_family, -1, sc->gif_psrc,
(struct sockaddr *)&smask6, sc->gif_pdst,
(struct sockaddr *)&dmask6,
(struct protosw *)&in6_gif_protosw, &sc->gif_if);
if (p == NULL) {
error = EINVAL;
goto bad;
}
if (sc->encap_cookie != NULL)
(void)encap_detach(sc->encap_cookie);
sc->encap_cookie = p;
sc->gif_oflags = ifp->if_flags;
break;
#if INET6
case SIOCSIFPHYADDR_IN6:
#endif
switch (ifr->ifr_addr.sa_family) {
#if INET6
case AF_INET6:
src = (struct sockaddr *)
&(((struct in6_aliasreq *)data)->ifra_addr);
dst = (struct sockaddr *)
&(((struct in6_aliasreq *)data)->ifra_dstaddr);
bzero(&smask6, sizeof(smask6));
smask6.sin6_addr.s6_addr32[0] = ~0;
smask6.sin6_addr.s6_addr32[1] = ~0;
smask6.sin6_addr.s6_addr32[2] = ~0;
smask6.sin6_addr.s6_addr32[3] = ~0;
#if 0
smask6.sin6_scope_id = ~0;
#endif
dmask6 = smask6;
if ((ifp->if_flags & IFF_LINK0) == 0 &&
IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)dst)->sin6_addr)) {
bzero(&dmask6, sizeof(dmask6));
#if 0
dmask6.sin6_scope_id = ~0;
#endif
}
size = sizeof(struct sockaddr_in6);
break;
#endif
default:
error = EAFNOSUPPORT;
goto bad;
}
if (sc->encap_cookie != NULL)
(void)encap_detach(sc->encap_cookie);
if (sc->gif_psrc != NULL) {
_FREE((caddr_t)sc->gif_psrc, M_IFADDR);
sc->gif_psrc = NULL;
}
if (sc->gif_pdst != NULL) {
_FREE((caddr_t)sc->gif_pdst, M_IFADDR);
sc->gif_pdst = NULL;
}
p = encap_attach(ifr->ifr_addr.sa_family, -1, src,
(struct sockaddr *)&smask6, dst,
(struct sockaddr *)&dmask6,
(struct protosw *)&in6_gif_protosw, &sc->gif_if);
if (p == NULL) {
error = EINVAL;
goto bad;
}
sc->encap_cookie = p;
sc->gif_oflags = ifp->if_flags;
sa = (struct sockaddr *)_MALLOC(size, M_IFADDR, M_WAITOK);
bcopy((caddr_t)src, (caddr_t)sa, size);
sc->gif_psrc = sa;
sa = (struct sockaddr *)_MALLOC(size, M_IFADDR, M_WAITOK);
bcopy((caddr_t)dst, (caddr_t)sa, size);
sc->gif_pdst = sa;
ifp->if_flags |= IFF_UP;
if_up(ifp);
error = 0;
break;
default:
error = EINVAL;
goto bad;
}
bad:
return error;
}