#if BSD310
#include "opt_mrouting.h"
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
#include "opt_inet.h"
#endif
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/mbuf.h>
#include <sys/errno.h>
#ifdef __FreeBSD__
#include <sys/kernel.h>
#include <sys/sysctl.h>
#endif
#if !defined(__FreeBSD__) || __FreeBSD__ < 3
#include <sys/ioctl.h>
#endif
#include <sys/protosw.h>
#if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__)
#include <sys/malloc.h>
#endif
#include <net/if.h>
#include <net/route.h>
#include <net/if_gif.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/in_gif.h>
#include <netinet/in_var.h>
#include <netinet/ip_encap.h>
#include <netinet/ip_ecn.h>
#if INET6
#include <netinet/ip6.h>
#endif
#if MROUTING
#include <netinet/ip_mroute.h>
#endif
#include <net/if_gif.h>
#include "gif.h"
#include <net/net_osdep.h>
#if NGIF > 0
int ip_gif_ttl = GIF_TTL;
#else
int ip_gif_ttl = 0;
#endif
extern struct protosw in_gif_protosw;
SYSCTL_INT(_net_inet_ip, IPCTL_GIF_TTL, gifttl,
CTLFLAG_RW, &ip_gif_ttl , 0, "");
int
in_gif_output(ifp, family, m, rt)
struct ifnet *ifp;
int family;
struct mbuf *m;
struct rtentry *rt;
{
register struct gif_softc *sc = (struct gif_softc*)ifp;
struct sockaddr_in *dst = (struct sockaddr_in *)&sc->gif_ro.ro_dst;
struct sockaddr_in *sin_src = (struct sockaddr_in *)sc->gif_psrc;
struct sockaddr_in *sin_dst = (struct sockaddr_in *)sc->gif_pdst;
struct ip iphdr;
int proto, error;
u_int8_t tos;
if (sin_src == NULL || sin_dst == NULL ||
sin_src->sin_family != AF_INET ||
sin_dst->sin_family != AF_INET) {
printf("in_gif_output: unknown family src=%x dst=%x\n", sin_src->sin_family, sin_dst->sin_family);
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 *);
tos = 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 *);
tos = (ntohl(ip6->ip6_flow) >> 20) & 0xff;
break;
}
#endif
default:
#if DEBUG
printf("in_gif_output: warning: unknown family %d passed\n",
family);
#endif
m_freem(m);
return EAFNOSUPPORT;
}
bzero(&iphdr, sizeof(iphdr));
iphdr.ip_src = sin_src->sin_addr;
if (ifp->if_flags & IFF_LINK0) {
if (sin_dst->sin_addr.s_addr != INADDR_ANY)
iphdr.ip_dst = sin_dst->sin_addr;
else if (rt) {
if (family != AF_INET) {
m_freem(m);
return EINVAL;
}
iphdr.ip_dst = ((struct sockaddr_in *)
(rt->rt_gateway))->sin_addr;
} else {
m_freem(m);
return ENETUNREACH;
}
} else {
if (sin_dst->sin_addr.s_addr != INADDR_ANY)
iphdr.ip_dst = sin_dst->sin_addr;
else {
m_freem(m);
return ENETUNREACH;
}
}
iphdr.ip_p = proto;
iphdr.ip_ttl = ip_gif_ttl;
iphdr.ip_len = m->m_pkthdr.len + sizeof(struct ip);
if (ifp->if_flags & IFF_LINK1)
ip_ecn_ingress(ECN_ALLOWED, &iphdr.ip_tos, &tos);
M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
if (m && m->m_len < sizeof(struct ip))
m = m_pullup(m, sizeof(struct ip));
if (m == NULL) {
printf("ENOBUFS in in_gif_output %d\n", __LINE__);
return ENOBUFS;
}
*(mtod(m, struct ip *)) = iphdr;
if (dst->sin_family != sin_dst->sin_family ||
dst->sin_addr.s_addr != sin_dst->sin_addr.s_addr) {
dst->sin_family = sin_dst->sin_family;
dst->sin_len = sizeof(struct sockaddr_in);
dst->sin_addr = sin_dst->sin_addr;
if (sc->gif_ro.ro_rt) {
RTFREE(sc->gif_ro.ro_rt);
sc->gif_ro.ro_rt = NULL;
}
#if 0
sc->gif_if.if_mtu = GIF_MTU;
#endif
}
if (sc->gif_ro.ro_rt == NULL) {
rtalloc(&sc->gif_ro);
if (sc->gif_ro.ro_rt == NULL) {
m_freem(m);
return ENETUNREACH;
}
#if 0
ifp->if_mtu = sc->gif_ro.ro_rt->rt_ifp->if_mtu
- sizeof(struct ip);
#endif
}
#ifndef __OpenBSD__
error = ip_output(m, NULL, &sc->gif_ro, 0, NULL);
#else
error = ip_output(m, NULL, &sc->gif_ro, 0, NULL, NULL);
#endif
return(error);
}
void
in_gif_input(m, off)
struct mbuf *m;
int off;
{
struct gif_softc *sc;
struct ifnet *gifp = NULL;
struct ip *ip;
int i, af, proto;
u_int8_t otos;
if (gif == NULL) {
m_freem(m);
return;
}
ip = mtod(m, struct ip *);
proto = ip->ip_p;
#if 0
#define satosin(sa) ((struct sockaddr_in *)(sa))
for (i = 0, sc = gif; i < ngif; i++, sc++) {
if (sc->gif_psrc == NULL
|| sc->gif_pdst == NULL
|| sc->gif_psrc->sa_family != AF_INET
|| sc->gif_pdst->sa_family != AF_INET) {
continue;
}
if ((sc->gif_if.if_flags & IFF_UP) == 0)
continue;
if ((sc->gif_if.if_flags & IFF_LINK0)
&& satosin(sc->gif_psrc)->sin_addr.s_addr == ip->ip_dst.s_addr
&& satosin(sc->gif_pdst)->sin_addr.s_addr == INADDR_ANY) {
gifp = &sc->gif_if;
continue;
}
if (satosin(sc->gif_psrc)->sin_addr.s_addr == ip->ip_dst.s_addr
&& satosin(sc->gif_pdst)->sin_addr.s_addr == ip->ip_src.s_addr)
{
gifp = &sc->gif_if;
break;
}
}
#else
gifp = (struct ifnet *)encap_getarg(m);
#endif
if (gifp == NULL) {
if (proto == IPPROTO_IPV4) {
#ifdef __OpenBSD__
#if defined(MROUTING) || defined(IPSEC)
ip4_input(m, off, proto);
return;
#endif
#else
#if MROUTING
ipip_input(m, off);
return;
#endif
#endif
}
m_freem(m);
ipstat.ips_nogif++;
return;
}
if ((gifp->if_flags & IFF_UP) == 0) {
m_freem(m);
ipstat.ips_nogif++;
return;
}
otos = ip->ip_tos;
m_adj(m, off);
switch (proto) {
#if INET
case IPPROTO_IPV4:
{
struct ip *ip;
af = AF_INET;
if (m->m_len < sizeof(*ip)) {
m = m_pullup(m, sizeof(*ip));
if (!m)
return;
}
ip = mtod(m, struct ip *);
if (gifp->if_flags & IFF_LINK1)
ip_ecn_egress(ECN_ALLOWED, &otos, &ip->ip_tos);
break;
}
#endif
#if INET6
case IPPROTO_IPV6:
{
struct ip6_hdr *ip6;
u_int8_t itos;
af = AF_INET6;
if (m->m_len < sizeof(*ip6)) {
m = m_pullup(m, sizeof(*ip6));
if (!m)
return;
}
ip6 = mtod(m, struct ip6_hdr *);
itos = (ntohl(ip6->ip6_flow) >> 20) & 0xff;
if (gifp->if_flags & IFF_LINK1)
ip_ecn_egress(ECN_ALLOWED, &otos, &itos);
ip6->ip6_flow &= ~htonl(0xff << 20);
ip6->ip6_flow |= htonl((u_int32_t)itos << 20);
break;
}
#endif
default:
ipstat.ips_nogif++;
m_freem(m);
return;
}
gif_input(m, af, gifp);
return;
}
int
in_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_in smask4, dmask4;
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(&smask4, sizeof(smask4));
smask4.sin_addr.s_addr = ~0;
dmask4 = smask4;
if ((ifp->if_flags & IFF_LINK0) != 0 &&
((struct sockaddr_in *)dst)->sin_addr.s_addr ==
INADDR_ANY) {
bzero(&dmask4, sizeof(dmask4));
}
p = encap_attach(sc->gif_psrc->sa_family, -1, sc->gif_psrc,
(struct sockaddr *)&smask4, sc->gif_pdst,
(struct sockaddr *)&dmask4,
(struct protosw *)&in_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;
case SIOCSIFPHYADDR:
switch (ifr->ifr_addr.sa_family) {
case AF_INET:
src = (struct sockaddr *)
&(((struct in_aliasreq *)data)->ifra_addr);
dst = (struct sockaddr *)
&(((struct in_aliasreq *)data)->ifra_dstaddr);
bzero(&smask4, sizeof(smask4));
smask4.sin_addr.s_addr = ~0;
dmask4 = smask4;
if ((ifp->if_flags & IFF_LINK0) != 0 &&
((struct sockaddr_in *)dst)->sin_addr.s_addr ==
INADDR_ANY) {
bzero(&dmask4, sizeof(dmask4));
}
size = sizeof(struct sockaddr_in);
break;
default:
error = EAFNOSUPPORT;
goto bad;
}
if (sc->encap_cookie)
(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 *)&smask4, dst,
(struct sockaddr *)&dmask4,
(struct protosw *)&in_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);
if (sa == NULL)
return (ENOMEM);
bcopy((caddr_t)src, (caddr_t)sa, size);
sc->gif_psrc = sa;
sa = (struct sockaddr *)_MALLOC(size, M_IFADDR, M_WAITOK);
if (sa == NULL)
return (ENOMEM);
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;
}