*
* @APPLE_LICENSE_HEADER_END@
*/
-/* $KAME: in_gif.c,v 1.27 2000/03/30 01:29:05 jinmei Exp $ */
+/* $KAME: in_gif.c,v 1.54 2001/05/14 14:02:16 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* SUCH DAMAGE.
*/
-/*
- * in_gif.c
- */
-#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 <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 ip_gif_ttl = GIF_TTL;
+SYSCTL_INT(_net_inet_ip, IPCTL_GIF_TTL, gifttl, CTLFLAG_RW,
+ &ip_gif_ttl, 0, "");
int
in_gif_output(ifp, family, m, rt)
struct mbuf *m;
struct rtentry *rt;
{
- register struct gif_softc *sc = (struct gif_softc*)ifp;
+ 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;
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;
}
bzero(&iphdr, sizeof(iphdr));
iphdr.ip_src = sin_src->sin_addr;
- if (ifp->if_flags & IFF_LINK0) {
- /* multi-destination mode */
- 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; /*XXX*/
- }
- iphdr.ip_dst = ((struct sockaddr_in *)
- (rt->rt_gateway))->sin_addr;
- } else {
- m_freem(m);
- return ENETUNREACH;
- }
- } else {
- /* bidirectional configured tunnel mode */
- if (sin_dst->sin_addr.s_addr != INADDR_ANY)
- iphdr.ip_dst = sin_dst->sin_addr;
- else {
- m_freem(m);
- return ENETUNREACH;
- }
+ /* bidirectional configured tunnel mode */
+ 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;
/* version will be set in ip_output() */
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);
+ else
+ ip_ecn_ingress(ECN_NOCARE, &iphdr.ip_tos, &tos);
/* prepend new IP header */
M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
printf("ENOBUFS in in_gif_output %d\n", __LINE__);
return ENOBUFS;
}
-
- *(mtod(m, struct ip *)) = iphdr;
+ bcopy(&iphdr, mtod(m, struct ip *), sizeof(struct ip));
if (dst->sin_family != sin_dst->sin_family ||
dst->sin_addr.s_addr != sin_dst->sin_addr.s_addr) {
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);
+ rtfree(sc->gif_ro.ro_rt);
sc->gif_ro.ro_rt = NULL;
}
#if 0
m_freem(m);
return ENETUNREACH;
}
+
+ /* if it constitutes infinite encapsulation, punt. */
+ if (sc->gif_ro.ro_rt->rt_ifp == ifp) {
+ m_freem(m);
+ return ENETUNREACH; /*XXX*/
+ }
#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);
}
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
- /* this code will be soon improved. */
-#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;
- }
+ proto = ip->ip_p;
- 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) {
- /* for backward compatibility */
- 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 /*MROUTING*/
-#endif
- }
- m_freem(m);
- ipstat.ips_nogif++;
- return;
- }
-
- if ((gifp->if_flags & IFF_UP) == 0) {
+ if (gifp == NULL || (gifp->if_flags & IFF_UP) == 0) {
m_freem(m);
ipstat.ips_nogif++;
return;
ip = mtod(m, struct ip *);
if (gifp->if_flags & IFF_LINK1)
ip_ecn_egress(ECN_ALLOWED, &otos, &ip->ip_tos);
+ else
+ ip_ecn_egress(ECN_NOCARE, &otos, &ip->ip_tos);
break;
}
#endif
itos = (ntohl(ip6->ip6_flow) >> 20) & 0xff;
if (gifp->if_flags & IFF_LINK1)
ip_ecn_egress(ECN_ALLOWED, &otos, &itos);
+ else
+ ip_ecn_egress(ECN_NOCARE, &otos, &itos);
ip6->ip6_flow &= ~htonl(0xff << 20);
ip6->ip6_flow |= htonl((u_int32_t)itos << 20);
break;
m_freem(m);
return;
}
+#ifdef __APPLE__
+ /* Should we free m if dlil_input returns an error? */
+ if (m->m_pkthdr.rcvif) /* replace the rcvif by gifp for dlil to route it correctly */
+ m->m_pkthdr.rcvif = gifp;
+ dlil_input_packet(gifp, m, NULL);
+#else
gif_input(m, af, gifp);
+#endif
return;
}
+/*
+ * we know that we are in IFF_UP, outer address available, and outer family
+ * matched the physical addr family. see gif_encapcheck().
+ */
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;
+gif_encapcheck4(m, off, proto, arg)
+ const struct mbuf *m;
+ int off;
+ int proto;
+ void *arg;
{
- 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:
- /*
- * whenever we change our idea about multi-destination mode
- * we need to update encap attachment.
- */
- 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;
- }
+ struct ip ip;
+ struct gif_softc *sc;
+ struct sockaddr_in *src, *dst;
+ int addrmatch;
+ struct in_ifaddr *ia4;
+
+ /* sanity check done in caller */
+ sc = (struct gif_softc *)arg;
+ src = (struct sockaddr_in *)sc->gif_psrc;
+ dst = (struct sockaddr_in *)sc->gif_pdst;
+
+ /* LINTED const cast */
+ m_copydata((struct mbuf *)m, 0, sizeof(ip), (caddr_t)&ip);
+
+ /* check for address match */
+ addrmatch = 0;
+ if (src->sin_addr.s_addr == ip.ip_dst.s_addr)
+ addrmatch |= 1;
+ if (dst->sin_addr.s_addr == ip.ip_src.s_addr)
+ addrmatch |= 2;
+ if (addrmatch != 3)
+ return 0;
+
+ /* martian filters on outer source - NOT done in ip_input! */
+ if (IN_MULTICAST(ntohl(ip.ip_src.s_addr)))
+ return 0;
+ switch ((ntohl(ip.ip_src.s_addr) & 0xff000000) >> 24) {
+ case 0: case 127: case 255:
+ return 0;
+ }
+ /* reject packets with broadcast on source */
+ for (ia4 = TAILQ_FIRST(&in_ifaddrhead); ia4;
+ ia4 = TAILQ_NEXT(ia4, ia_link))
+ {
+ if ((ia4->ia_ifa.ifa_ifp->if_flags & IFF_BROADCAST) == 0)
+ continue;
+ if (ip.ip_src.s_addr == ia4->ia_broadaddr.sin_addr.s_addr)
+ return 0;
+ }
- 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;
+ /* ingress filters on outer source */
+ if ((sc->gif_if.if_flags & IFF_LINK2) == 0 &&
+ (m->m_flags & M_PKTHDR) != 0 && m->m_pkthdr.rcvif) {
+ struct sockaddr_in sin;
+ struct rtentry *rt;
+
+ bzero(&sin, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin.sin_len = sizeof(struct sockaddr_in);
+ sin.sin_addr = ip.ip_src;
+ rt = rtalloc1((struct sockaddr *)&sin, 0, 0UL);
+ if (!rt || rt->rt_ifp != m->m_pkthdr.rcvif) {
+#if 0
+ log(LOG_WARNING, "%s: packet from 0x%x dropped "
+ "due to ingress filter\n", if_name(&sc->gif_if),
+ (u_int32_t)ntohl(sin.sin_addr.s_addr));
+#endif
+ if (rt)
+ rtfree(rt);
+ return 0;
}
- 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); /* send up RTM_IFINFO */
-
- error = 0;
- break;
- default:
- error = EINVAL;
- goto bad;
+ rtfree(rt);
}
- bad:
- return error;
+ return 32 * 2;
}
projects / apple / xnu.git / blobdiff