-/* $FreeBSD: src/sys/netinet6/in6_gif.c,v 1.2.2.3 2001/07/03 11:01:52 ume Exp $ */
-/* $KAME: in6_gif.c,v 1.49 2001/05/14 14:02:17 itojun Exp $ */
+/*
+ * Copyright (c) 2009-2016 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+/* $FreeBSD: src/sys/netinet6/in6_gif.c,v 1.2.2.3 2001/07/03 11:01:52 ume Exp $ */
+/* $KAME: in6_gif.c,v 1.49 2001/05/14 14:02:17 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
#include <net/net_osdep.h>
-extern u_long route_generation;
-
-static __inline__ void*
-_cast_non_const(const void * ptr) {
- union {
- const void* cval;
- void* val;
- } ret;
-
- ret.cval = ptr;
- return (ret.val);
-}
-
int
in6_gif_output(
struct ifnet *ifp,
{
struct gif_softc *sc = ifnet_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 sockaddr_in6 *sin6_src = (struct sockaddr_in6 *)
+ (void *)sc->gif_psrc;
+ struct sockaddr_in6 *sin6_dst = (struct sockaddr_in6 *)
+ (void *)sc->gif_pdst;
struct ip6_hdr *ip6;
int proto;
u_int8_t itos, otos;
+ GIF_LOCK_ASSERT(sc);
+
if (sin6_src == NULL || sin6_dst == NULL ||
sin6_src->sin6_family != AF_INET6 ||
sin6_dst->sin6_family != AF_INET6) {
switch (family) {
#if INET
case AF_INET:
- {
+ {
struct ip *ip;
proto = IPPROTO_IPV4;
if (mbuf_len(m) < sizeof(*ip)) {
m = m_pullup(m, sizeof(*ip));
- if (!m)
+ if (!m) {
return ENOBUFS;
+ }
}
ip = mtod(m, struct ip *);
itos = ip->ip_tos;
break;
- }
+ }
#endif
#if INET6
case AF_INET6:
- {
+ {
proto = IPPROTO_IPV6;
if (mbuf_len(m) < sizeof(*ip6)) {
m = m_pullup(m, sizeof(*ip6));
- if (!m)
+ 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);
+ family);
#endif
m_freem(m);
return EAFNOSUPPORT;
}
-
+
/* prepend new IP header */
- M_PREPEND(m, sizeof(struct ip6_hdr), M_DONTWAIT);
- if (m && mbuf_len(m) < sizeof(struct ip6_hdr))
+ M_PREPEND(m, sizeof(struct ip6_hdr), M_DONTWAIT, 1);
+ if (m && mbuf_len(m) < 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;
+ 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;
/* bidirectional configured tunnel mode */
- if (!IN6_IS_ADDR_UNSPECIFIED(&sin6_dst->sin6_addr))
+ if (!IN6_IS_ADDR_UNSPECIFIED(&sin6_dst->sin6_addr)) {
ip6->ip6_dst = sin6_dst->sin6_addr;
- else {
+ } else {
m_freem(m);
return ENETUNREACH;
}
- if (ifp->if_flags & IFF_LINK1)
- ip_ecn_ingress(ECN_ALLOWED, &otos, &itos);
- else
- ip_ecn_ingress(ECN_NOCARE, &otos, &itos);
- ip6->ip6_flow &= ~ntohl(0xff00000);
+ ip_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_NORMAL : ECN_NOCARE,
+ &otos, &itos);
+ ip6->ip6_flow &= ~htonl(0xff << 20);
ip6->ip6_flow |= htonl((u_int32_t)otos << 20);
- if (dst->sin6_family != sin6_dst->sin6_family ||
+ if (ROUTE_UNUSABLE(&sc->gif_ro6) ||
+ dst->sin6_family != sin6_dst->sin6_family ||
!IN6_ARE_ADDR_EQUAL(&dst->sin6_addr, &sin6_dst->sin6_addr) ||
- (sc->gif_ro6.ro_rt != NULL &&
- (sc->gif_ro6.ro_rt->generation_id != route_generation ||
- sc->gif_ro6.ro_rt->rt_ifp == ifp))) {
- /* cache route doesn't match */
+ (sc->gif_ro6.ro_rt != NULL && sc->gif_ro6.ro_rt->rt_ifp == ifp)) {
+ /* cache route doesn't match or recursive route */
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;
- }
+ ROUTE_RELEASE(&sc->gif_ro6);
#if 0
sc->gif_if.if_mtu = GIF_MTU;
#endif
m_freem(m);
return ENETUNREACH;
}
-
+ RT_LOCK(sc->gif_ro6.ro_rt);
/* if it constitutes infinite encapsulation, punt. */
if (sc->gif_ro6.ro_rt->rt_ifp == ifp) {
+ RT_UNLOCK(sc->gif_ro6.ro_rt);
m_freem(m);
- return ENETUNREACH; /*XXX*/
+ return ENETUNREACH; /* XXX */
}
#if 0
ifp->if_mtu = sc->gif_ro6.ro_rt->rt_ifp->if_mtu
- - sizeof(struct ip6_hdr);
+ - sizeof(struct ip6_hdr);
#endif
+ RT_UNLOCK(sc->gif_ro6.ro_rt);
}
-
+
#if IPV6_MINMTU
/*
* force fragmentation to minimum MTU, to avoid path MTU discovery.
* it is too painful to ask for resend of inner packet, to achieve
* path MTU discovery for encapsulated packets.
*/
- return(ip6_output(m, 0, &sc->gif_ro6, IPV6_MINMTU, 0, NULL, 0));
+ return ip6_output(m, 0, &sc->gif_ro6, IPV6_MINMTU, 0, NULL, NULL);
#else
- return(ip6_output(m, 0, &sc->gif_ro6, 0, 0, NULL, 0));
+ return ip6_output(m, 0, &sc->gif_ro6, 0, 0, NULL, NULL);
#endif
}
-int in6_gif_input(mp, offp)
- struct mbuf **mp;
- int *offp;
+int
+in6_gif_input(struct mbuf **mp, int *offp, int proto)
{
struct mbuf *m = *mp;
struct ifnet *gifp = NULL;
struct ip6_hdr *ip6;
int af = 0;
u_int32_t otos;
- u_int8_t proto;
+ int egress_success = 0;
ip6 = mtod(m, struct ip6_hdr *);
- gifp = ((struct gif_softc*)encap_getarg(m))->gif_if;
+ gifp = ((struct gif_softc *)encap_getarg(m))->gif_if;
if (gifp == NULL || (gifp->if_flags & IFF_UP) == 0) {
m_freem(m);
return IPPROTO_DONE;
}
- proto = ip6->ip6_nxt;
otos = ip6->ip6_flow;
m_adj(m, *offp);
switch (proto) {
#if INET
case IPPROTO_IPV4:
- {
+ {
struct ip *ip;
- u_int8_t otos8;
+ u_int8_t otos8, old_tos;
+ int sum;
+
af = AF_INET;
otos8 = (ntohl(otos) >> 20) & 0xff;
if (mbuf_len(m) < sizeof(*ip)) {
m = m_pullup(m, sizeof(*ip));
- if (!m)
+ 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);
- else
- ip_ecn_egress(ECN_NOCARE, &otos8, &ip->ip_tos);
+ if (gifp->if_flags & IFF_LINK1) {
+ old_tos = ip->ip_tos;
+ egress_success = ip_ecn_egress(ECN_NORMAL, &otos8, &ip->ip_tos);
+ if (old_tos != ip->ip_tos) {
+ sum = ~ntohs(ip->ip_sum) & 0xffff;
+ sum += (~old_tos & 0xffff) + ip->ip_tos;
+ sum = (sum >> 16) + (sum & 0xffff);
+ sum += (sum >> 16); /* add carry */
+ ip->ip_sum = htons(~sum & 0xffff);
+ }
+ } else {
+ egress_success = ip_ecn_egress(ECN_NOCARE, &otos8, &ip->ip_tos);
+ }
break;
- }
+ }
#endif /* INET */
#if INET6
case IPPROTO_IPV6:
- {
+ {
af = AF_INET6;
if (mbuf_len(m) < sizeof(*ip6)) {
m = m_pullup(m, sizeof(*ip6));
- if (!m)
+ 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);
- else
- ip6_ecn_egress(ECN_NOCARE, &otos, &ip6->ip6_flow);
+ if (gifp->if_flags & IFF_LINK1) {
+ egress_success = ip6_ecn_egress(ECN_NORMAL, &otos, &ip6->ip6_flow);
+ } else {
+ egress_success = ip6_ecn_egress(ECN_NOCARE, &otos, &ip6->ip6_flow);
+ }
break;
- }
+ }
#endif
default:
ip6stat.ip6s_nogif++;
return IPPROTO_DONE;
}
- if (m->m_pkthdr.rcvif) /* replace the rcvif by gifp for ifnet_input to route it correctly */
+ if (egress_success == 0) {
+ ip6stat.ip6s_nogif++;
+ m_freem(m);
+ return IPPROTO_DONE;
+ }
+
+ /* Replace the rcvif by gifp for ifnet_input to route it correctly */
+ if (m->m_pkthdr.rcvif) {
m->m_pkthdr.rcvif = gifp;
+ }
ifnet_input(gifp, m, NULL);
return IPPROTO_DONE;
{
struct sockaddr_in6 *src, *dst;
- src = (struct sockaddr_in6 *)sc->gif_psrc;
- dst = (struct sockaddr_in6 *)sc->gif_pdst;
+ src = (struct sockaddr_in6 *)(void *)sc->gif_psrc;
+ dst = (struct sockaddr_in6 *)(void *)sc->gif_pdst;
/*
* Check for address match. Note that the check is for an incoming
* and the *destination* address of the packet, and vice versa.
*/
if (!IN6_ARE_ADDR_EQUAL(&src->sin6_addr, &ip6->ip6_dst) ||
- !IN6_ARE_ADDR_EQUAL(&dst->sin6_addr, &ip6->ip6_src))
+ !IN6_ARE_ADDR_EQUAL(&dst->sin6_addr, &ip6->ip6_src)) {
return 0;
+ }
/* martian filters on outer source - done in ip6_input */
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_addr = ip6->ip6_src;
-#ifndef SCOPEDROUTING
- sin6.sin6_scope_id = 0; /* XXX */
-#endif
- rt = rtalloc1((struct sockaddr *)&sin6, 0, 0UL);
+ rt = rtalloc1((struct sockaddr *)&sin6, 0, 0);
+ if (rt != NULL) {
+ RT_LOCK(rt);
+ }
if (!rt || rt->rt_ifp != ifp) {
#if 0
log(LOG_WARNING, "%s: packet from %s dropped "
"due to ingress filter\n", if_name(&sc->gif_if),
ip6_sprintf(&sin6.sin6_addr));
#endif
- if (rt)
+ if (rt != NULL) {
+ RT_UNLOCK(rt);
rtfree(rt);
+ }
return 0;
}
+ RT_UNLOCK(rt);
rtfree(rt);
}
/* sanity check done in caller */
sc = (struct gif_softc *)arg;
- mbuf_copydata(m, 0, sizeof(ip6), &ip6);
+ GIF_LOCK_ASSERT(sc);
+
+ mbuf_copydata((struct mbuf *)(size_t)m, 0, sizeof(ip6), &ip6);
ifp = ((m->m_flags & M_PKTHDR) != 0) ? m->m_pkthdr.rcvif : NULL;
return gif_validate6(&ip6, sc, ifp);
projects / apple / xnu.git / blobdiff