+/*
+ * Copyright (c) 2000-2018 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/net/if_stf.c,v 1.1.2.6 2001/07/24 19:10:18 brooks Exp $ */
/* $KAME: if_stf.c,v 1.62 2001/06/07 22:32:16 itojun Exp $ */
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2006 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */
/*
* 6to4 interface, based on RFC3056.
* ICMPv6:
* - Redirects cannot be used due to the lack of link-local address.
*
- * stf interface does not have, and will not need, a link-local address.
+ * stf interface does not have, and will not need, a link-local address.
* It seems to have no real benefit and does not help the above symptoms much.
* Even if we assign link-locals to interface, we cannot really
* use link-local unicast/multicast on top of 6to4 cloud (since there's no
#include <sys/protosw.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
-#include <machine/cpu.h>
#include <sys/malloc.h>
+#include <kern/locks.h>
+
#include <net/if.h>
#include <net/route.h>
-#include <net/netisr.h>
#include <net/if_types.h>
-#include <net/if_stf.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip_ecn.h>
#include <netinet/ip_encap.h>
-#include <net/dlil.h>
+#include <net/kpi_interface.h>
+#include <net/kpi_protocol.h>
#include <net/net_osdep.h>
#include <net/bpf.h>
-#define IN6_IS_ADDR_6TO4(x) (ntohs((x)->s6_addr16[0]) == 0x2002)
-#define GET_V4(x) ((struct in_addr *)(&(x)->s6_addr16[1]))
+#if CONFIG_MACF_NET
+#include <security/mac_framework.h>
+#endif
+
+#define GET_V4(x) ((const struct in_addr *)(const void *)(&(x)->s6_addr16[1]))
+
+static lck_grp_t *stf_mtx_grp;
struct stf_softc {
- struct ifnet sc_if; /* common area */
-#ifdef __APPLE__
- struct if_proto *stf_proto; /* dlil protocol attached */
-#endif
+ ifnet_t sc_if; /* common area */
+ u_int32_t sc_protocol_family; /* dlil protocol attached */
union {
struct route __sc_ro4;
struct route_in6 __sc_ro6; /* just for safety */
} __sc_ro46;
-#define sc_ro __sc_ro46.__sc_ro4
+#define sc_ro __sc_ro46.__sc_ro4
+ decl_lck_mtx_data(, sc_ro_mtx);
const struct encaptab *encap_cookie;
+ bpf_tap_mode tap_mode;
+ bpf_packet_func tap_callback;
};
-static struct stf_softc *stf;
-
-#ifdef __APPLE__
-void stfattach __P((void));
-int stf_pre_output __P((struct ifnet *, register struct mbuf **, struct sockaddr *,
- caddr_t, char *, char *, u_long));
-static u_long stf_dl_tag=0;
-#endif
+void stfattach(void);
-#ifndef __APPLE__
-static MALLOC_DEFINE(M_STF, "stf", "6to4 Tunnel Interface");
-#endif
static int ip_stf_ttl = 40;
+static int stf_init_done;
-extern struct domain inetdomain;
-struct protosw in_stf_protosw =
-{ SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR,
- in_stf_input, rip_output, 0, rip_ctloutput,
- 0,
- 0, 0, 0, 0,
- 0,
- &rip_usrreqs
-};
+static void in_stf_input(struct mbuf *, int);
+static void stfinit(void);
-static int stf_encapcheck __P((const struct mbuf *, int, int, void *));
-static struct in6_ifaddr *stf_getsrcifa6 __P((struct ifnet *));
-int stf_pre_output __P((struct ifnet *, register struct mbuf **, struct sockaddr *,
- caddr_t, char *, char *, u_long));
-static int stf_checkaddr4 __P((struct stf_softc *, struct in_addr *,
- struct ifnet *));
-static int stf_checkaddr6 __P((struct stf_softc *, struct in6_addr *,
- struct ifnet *));
-static void stf_rtrequest __P((int, struct rtentry *, struct sockaddr *));
-int stf_ioctl __P((struct ifnet *, u_long, void *));
+static struct protosw in_stf_protosw =
+{
+ .pr_type = SOCK_RAW,
+ .pr_protocol = IPPROTO_IPV6,
+ .pr_flags = PR_ATOMIC | PR_ADDR,
+ .pr_input = in_stf_input,
+ .pr_ctloutput = rip_ctloutput,
+ .pr_usrreqs = &rip_usrreqs,
+ .pr_unlock = rip_unlock,
+};
+static int stf_encapcheck(const struct mbuf *, int, int, void *);
+static struct in6_ifaddr *stf_getsrcifa6(struct ifnet *);
+int stf_pre_output(struct ifnet *, protocol_family_t, struct mbuf **,
+ const struct sockaddr *, void *, char *, char *);
+static int stf_checkaddr4(struct stf_softc *, const struct in_addr *,
+ struct ifnet *);
+static int stf_checkaddr6(struct stf_softc *, struct in6_addr *,
+ struct ifnet *);
+static void stf_rtrequest(int, struct rtentry *, struct sockaddr *);
+static errno_t stf_ioctl(ifnet_t ifp, u_long cmd, void *data);
+static errno_t stf_output(ifnet_t ifp, mbuf_t m);
-static
-int stf_add_if(struct ifnet *ifp)
+static void
+stfinit(void)
{
- ifp->if_demux = 0;
- ifp->if_framer = 0;
- return 0;
+ if (!stf_init_done) {
+ stf_mtx_grp = lck_grp_alloc_init("stf", LCK_GRP_ATTR_NULL);
+ stf_init_done = 1;
+ }
}
-static
-int stf_del_if(struct ifnet *ifp)
+/*
+ * gif_input is the input handler for IP and IPv6 attached to gif
+ */
+static errno_t
+stf_media_input(
+ __unused ifnet_t ifp,
+ protocol_family_t protocol_family,
+ mbuf_t m,
+ __unused char *frame_header)
{
- return 0;
+ if (proto_input(protocol_family, m) != 0) {
+ m_freem(m);
+ }
+
+ return 0;
}
-static
-int stf_add_proto(struct ddesc_head_str *desc_head, struct if_proto *proto, u_long dl_tag)
-{
+
+
+static errno_t
+stf_add_proto(
+ ifnet_t ifp,
+ protocol_family_t protocol_family,
+ __unused const struct ifnet_demux_desc *demux_array,
+ __unused u_int32_t demux_count)
+{
/* Only one protocol may be attached at a time */
- struct stf_softc* stf = (struct stf_softc*)proto->ifp;
- if (stf->stf_proto == NULL)
- stf->stf_proto = proto;
- else {
+ struct stf_softc* stf = ifnet_softc(ifp);
+ if (stf->sc_protocol_family == 0) {
+ stf->sc_protocol_family = protocol_family;
+ } else {
printf("stf_add_proto: stf already has a proto\n");
- return (EBUSY);
+ return EBUSY;
}
- return (0);
+ return 0;
}
-static
-int stf_del_proto(struct if_proto *proto, u_long dl_tag)
-{
- if (((struct stf_softc*)proto->ifp)->stf_proto == proto)
- ((struct stf_softc*)proto->ifp)->stf_proto = NULL;
- else
- return ENOENT;
+static errno_t
+stf_del_proto(
+ ifnet_t ifp,
+ protocol_family_t protocol_family)
+{
+ if (((struct stf_softc*)ifnet_softc(ifp))->sc_protocol_family == protocol_family) {
+ ((struct stf_softc*)ifnet_softc(ifp))->sc_protocol_family = 0;
+ }
return 0;
}
-int stf_shutdown()
+static errno_t
+stf_attach_inet6(
+ ifnet_t ifp,
+ protocol_family_t protocol_family)
{
- return 0;
+ struct ifnet_attach_proto_param reg;
+ errno_t stat;
+
+ if (protocol_family != PF_INET6) {
+ return EPROTONOSUPPORT;
+ }
+
+ bzero(®, sizeof(reg));
+ reg.input = stf_media_input;
+ reg.pre_output = stf_pre_output;
+
+ stat = ifnet_attach_protocol(ifp, protocol_family, ®);
+ if (stat && stat != EEXIST) {
+ printf("stf_attach_proto_family can't attach interface fam=%d\n",
+ protocol_family);
+ }
+
+ return stat;
}
-void stf_reg_if_mods()
-{
- struct dlil_ifmod_reg_str stf_ifmod;
-
- bzero(&stf_ifmod, sizeof(stf_ifmod));
- stf_ifmod.add_if = stf_add_if;
- stf_ifmod.del_if = stf_del_if;
- stf_ifmod.add_proto = stf_add_proto;
- stf_ifmod.del_proto = stf_del_proto;
- stf_ifmod.ifmod_ioctl = 0;
- stf_ifmod.shutdown = stf_shutdown;
-
-
- if (dlil_reg_if_modules(APPLE_IF_FAM_STF, &stf_ifmod))
- panic("Couldn't register stf modules\n");
-
-}
-
-u_long stf_attach_inet6(struct ifnet *ifp)
-{
- struct dlil_proto_reg_str reg;
- struct dlil_demux_desc desc;
- short native=0;
- int stat, i;
-
- if (stf_dl_tag != 0)
- return stf_dl_tag;
-
- TAILQ_INIT(®.demux_desc_head);
- desc.type = DLIL_DESC_RAW;
- desc.variants.bitmask.proto_id_length = 0;
- desc.variants.bitmask.proto_id = 0;
- desc.variants.bitmask.proto_id_mask = 0;
- desc.native_type = (char *) &native;
- TAILQ_INSERT_TAIL(®.demux_desc_head, &desc, next);
- reg.interface_family = ifp->if_family;
- reg.unit_number = ifp->if_unit;
- reg.input = 0;
- reg.pre_output = stf_pre_output;
- reg.event = 0;
- reg.offer = 0;
- reg.ioctl = 0;
- reg.default_proto = 0;
- reg.protocol_family = PF_INET6;
-
- stat = dlil_attach_protocol(®, &stf_dl_tag);
- if (stat) {
- panic("stf_attach_inet6 can't attach interface\n");
- }
-
- return stf_dl_tag;
+static errno_t
+stf_demux(
+ ifnet_t ifp,
+ __unused mbuf_t m,
+ __unused char *frame_ptr,
+ protocol_family_t *protocol_family)
+{
+ struct stf_softc* stf = ifnet_softc(ifp);
+ *protocol_family = stf->sc_protocol_family;
+ return 0;
}
-u_long stf_detach_inet6(struct ifnet *ifp)
+static errno_t
+stf_set_bpf_tap(
+ ifnet_t ifp,
+ bpf_tap_mode mode,
+ bpf_packet_func callback)
{
- u_long ip_dl_tag = 0;
- int stat;
+ struct stf_softc *sc = ifnet_softc(ifp);
- stat = dlil_find_dltag(ifp->if_family, ifp->if_unit, AF_INET6, &ip_dl_tag);
- if (stat == 0) {
- stat = dlil_detach_protocol(ip_dl_tag);
- if (stat) {
- printf("WARNING: stf_detach can't detach IP AF_INET6 from interface\n");
- }
- }
- return (stat);
-}
+ sc->tap_mode = mode;
+ sc->tap_callback = callback;
+ return 0;
+}
void
stfattach(void)
{
- struct ifnet *ifp;
struct stf_softc *sc;
- int i, error;
-
-
- int err;
+ int error;
const struct encaptab *p;
+ struct ifnet_init_eparams stf_init;
+
+ stfinit();
- stf_reg_if_mods(); /* DLIL modules */
+ error = proto_register_plumber(PF_INET6, APPLE_IF_FAM_STF,
+ stf_attach_inet6, NULL);
+ if (error != 0) {
+ printf("proto_register_plumber failed for AF_INET6 error=%d\n", error);
+ }
- sc = _MALLOC(sizeof(struct stf_softc), M_DEVBUF, M_WAITOK);
+ sc = _MALLOC(sizeof(struct stf_softc), M_DEVBUF, M_WAITOK | M_ZERO);
if (sc == 0) {
printf("stf softc attach failed\n" );
return;
}
-
- bzero(sc, sizeof(*sc));
- sc->sc_if.if_name = "stf";
- sc->sc_if.if_unit = 0;
p = encap_attach_func(AF_INET, IPPROTO_IPV6, stf_encapcheck,
&in_stf_protosw, sc);
if (p == NULL) {
- printf("%s: attach failed\n", if_name(&sc->sc_if));
+ printf("sftattach encap_attach_func failed\n");
FREE(sc, M_DEVBUF);
return;
}
sc->encap_cookie = p;
- sc->sc_if.if_mtu = IPV6_MMTU;
- sc->sc_if.if_flags = 0;
- sc->sc_if.if_ioctl = stf_ioctl;
- sc->sc_if.if_output = NULL; /* processing done in pre_output */
- sc->sc_if.if_type = IFT_STF;
- sc->sc_if.if_family= APPLE_IF_FAM_STF;
+ lck_mtx_init(&sc->sc_ro_mtx, stf_mtx_grp, LCK_ATTR_NULL);
+
+ bzero(&stf_init, sizeof(stf_init));
+ stf_init.ver = IFNET_INIT_CURRENT_VERSION;
+ stf_init.len = sizeof(stf_init);
+ stf_init.flags = IFNET_INIT_LEGACY;
+ stf_init.name = "stf";
+ stf_init.unit = 0;
+ stf_init.type = IFT_STF;
+ stf_init.family = IFNET_FAMILY_STF;
+ stf_init.output = stf_output;
+ stf_init.demux = stf_demux;
+ stf_init.add_proto = stf_add_proto;
+ stf_init.del_proto = stf_del_proto;
+ stf_init.softc = sc;
+ stf_init.ioctl = stf_ioctl;
+ stf_init.set_bpf_tap = stf_set_bpf_tap;
+
+ error = ifnet_allocate_extended(&stf_init, &sc->sc_if);
+ if (error != 0) {
+ printf("stfattach, ifnet_allocate failed - %d\n", error);
+ encap_detach(sc->encap_cookie);
+ lck_mtx_destroy(&sc->sc_ro_mtx, stf_mtx_grp);
+ FREE(sc, M_DEVBUF);
+ return;
+ }
+ ifnet_set_mtu(sc->sc_if, IPV6_MMTU);
+ ifnet_set_flags(sc->sc_if, 0, 0xffff); /* clear all flags */
#if 0
/* turn off ingress filter */
- sc->sc_if.if_flags |= IFF_LINK2;
+ ifnet_set_flags(sc->sc_if, IFF_LINK2, IFF_LINK2);
+#endif
+
+#if CONFIG_MACF_NET
+ mac_ifnet_label_init(&sc->sc_if);
#endif
- sc->sc_if.if_snd.ifq_maxlen = IFQ_MAXLEN;
-
- if (error = dlil_if_attach(&sc->sc_if))
- printf("stfattach: can't dlil_if_attach error=%d\n");
- else
- bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int));
-
- return ;
+
+ error = ifnet_attach(sc->sc_if, NULL);
+ if (error != 0) {
+ printf("stfattach: ifnet_attach returned error=%d\n", error);
+ encap_detach(sc->encap_cookie);
+ ifnet_release(sc->sc_if);
+ lck_mtx_destroy(&sc->sc_ro_mtx, stf_mtx_grp);
+ FREE(sc, M_DEVBUF);
+ return;
+ }
+
+ bpfattach(sc->sc_if, DLT_NULL, sizeof(u_int));
+
+ return;
}
static int
-stf_encapcheck(m, off, proto, arg)
- const struct mbuf *m;
- int off;
- int proto;
- void *arg;
+stf_encapcheck(
+ const struct mbuf *m,
+ __unused int off,
+ int proto,
+ void *arg)
{
struct ip ip;
struct in6_ifaddr *ia6;
struct in_addr a, b;
sc = (struct stf_softc *)arg;
- if (sc == NULL)
+ if (sc == NULL) {
return 0;
+ }
- if ((sc->sc_if.if_flags & IFF_UP) == 0)
+ if ((ifnet_flags(sc->sc_if) & IFF_UP) == 0) {
return 0;
+ }
/* IFF_LINK0 means "no decapsulation" */
- if ((sc->sc_if.if_flags & IFF_LINK0) != 0)
+ if ((ifnet_flags(sc->sc_if) & IFF_LINK0) != 0) {
return 0;
+ }
- if (proto != IPPROTO_IPV6)
+ if (proto != IPPROTO_IPV6) {
return 0;
+ }
- /* LINTED const cast */
- m_copydata((struct mbuf *)m, 0, sizeof(ip), (caddr_t)&ip);
+ mbuf_copydata((struct mbuf *)(size_t)m, 0, sizeof(ip), &ip);
- if (ip.ip_v != 4)
+ if (ip.ip_v != 4) {
return 0;
+ }
- ia6 = stf_getsrcifa6(&sc->sc_if);
- if (ia6 == NULL)
+ ia6 = stf_getsrcifa6(sc->sc_if);
+ if (ia6 == NULL) {
return 0;
+ }
/*
* check if IPv4 dst matches the IPv4 address derived from the
* local 6to4 address.
* success on: dst = 10.1.1.1, ia6->ia_addr = 2002:0a01:0101:...
*/
+ IFA_LOCK(&ia6->ia_ifa);
if (bcmp(GET_V4(&ia6->ia_addr.sin6_addr), &ip.ip_dst,
- sizeof(ip.ip_dst)) != 0)
+ sizeof(ip.ip_dst)) != 0) {
+ IFA_UNLOCK(&ia6->ia_ifa);
+ IFA_REMREF(&ia6->ia_ifa);
return 0;
-
+ }
/*
* check if IPv4 src matches the IPv4 address derived from the
* local 6to4 address masked by prefixmask.
a.s_addr &= GET_V4(&ia6->ia_prefixmask.sin6_addr)->s_addr;
b = ip.ip_src;
b.s_addr &= GET_V4(&ia6->ia_prefixmask.sin6_addr)->s_addr;
- if (a.s_addr != b.s_addr)
+ if (a.s_addr != b.s_addr) {
+ IFA_UNLOCK(&ia6->ia_ifa);
+ IFA_REMREF(&ia6->ia_ifa);
return 0;
-
+ }
/* stf interface makes single side match only */
+ IFA_UNLOCK(&ia6->ia_ifa);
+ IFA_REMREF(&ia6->ia_ifa);
return 32;
}
static struct in6_ifaddr *
-stf_getsrcifa6(ifp)
- struct ifnet *ifp;
+stf_getsrcifa6(struct ifnet *ifp)
{
struct ifaddr *ia;
struct in_ifaddr *ia4;
struct sockaddr_in6 *sin6;
struct in_addr in;
- for (ia = ifp->if_addrlist.tqh_first;
- ia;
- ia = ia->ifa_list.tqe_next)
- {
- if (ia->ifa_addr == NULL)
+ ifnet_lock_shared(ifp);
+ for (ia = ifp->if_addrlist.tqh_first; ia; ia = ia->ifa_list.tqe_next) {
+ IFA_LOCK(ia);
+ if (ia->ifa_addr == NULL) {
+ IFA_UNLOCK(ia);
continue;
- if (ia->ifa_addr->sa_family != AF_INET6)
+ }
+ if (ia->ifa_addr->sa_family != AF_INET6) {
+ IFA_UNLOCK(ia);
continue;
- sin6 = (struct sockaddr_in6 *)ia->ifa_addr;
- if (!IN6_IS_ADDR_6TO4(&sin6->sin6_addr))
+ }
+ sin6 = (struct sockaddr_in6 *)(void *)ia->ifa_addr;
+ if (!IN6_IS_ADDR_6TO4(&sin6->sin6_addr)) {
+ IFA_UNLOCK(ia);
continue;
-
+ }
bcopy(GET_V4(&sin6->sin6_addr), &in, sizeof(in));
+ IFA_UNLOCK(ia);
+ lck_rw_lock_shared(in_ifaddr_rwlock);
for (ia4 = TAILQ_FIRST(&in_ifaddrhead);
- ia4;
- ia4 = TAILQ_NEXT(ia4, ia_link))
- {
- if (ia4->ia_addr.sin_addr.s_addr == in.s_addr)
+ ia4;
+ ia4 = TAILQ_NEXT(ia4, ia_link)) {
+ IFA_LOCK(&ia4->ia_ifa);
+ if (ia4->ia_addr.sin_addr.s_addr == in.s_addr) {
+ IFA_UNLOCK(&ia4->ia_ifa);
break;
+ }
+ IFA_UNLOCK(&ia4->ia_ifa);
}
- if (ia4 == NULL)
+ lck_rw_done(in_ifaddr_rwlock);
+ if (ia4 == NULL) {
continue;
+ }
+ IFA_ADDREF(ia); /* for caller */
+ ifnet_lock_done(ifp);
return (struct in6_ifaddr *)ia;
}
+ ifnet_lock_done(ifp);
return NULL;
}
int
-stf_pre_output(ifp, m0, dst, rt, frame_type, address, dl_tag)
- struct ifnet *ifp;
- register struct mbuf **m0;
- struct sockaddr *dst;
- caddr_t rt;
- char *frame_type;
- char *address;
- u_long dl_tag;
+stf_pre_output(
+ struct ifnet *ifp,
+ __unused protocol_family_t protocol_family,
+ struct mbuf **m0,
+ const struct sockaddr *dst,
+ __unused void *route,
+ __unused char *desk_linkaddr,
+ __unused char *frame_type)
{
- register struct mbuf *m = *m0;
+ struct mbuf *m = *m0;
struct stf_softc *sc;
- struct sockaddr_in6 *dst6;
- struct in_addr *in4;
- struct sockaddr_in *dst4;
+ const struct sockaddr_in6 *dst6;
+ const struct in_addr *in4;
u_int8_t tos;
struct ip *ip;
struct ip6_hdr *ip6;
struct in6_ifaddr *ia6;
- int error = 0 ;
+ struct sockaddr_in *dst4;
+ struct ip_out_args ipoa;
+ errno_t result = 0;
+
+ bzero(&ipoa, sizeof(ipoa));
+ ipoa.ipoa_boundif = IFSCOPE_NONE;
+ ipoa.ipoa_flags = IPOAF_SELECT_SRCIF;
+ ipoa.ipoa_sotc = SO_TC_UNSPEC;
+ ipoa.ipoa_netsvctype = _NET_SERVICE_TYPE_UNSPEC;
- sc = (struct stf_softc*)ifp;
- dst6 = (struct sockaddr_in6 *)dst;
+ sc = ifnet_softc(ifp);
+ dst6 = (const struct sockaddr_in6 *)(const void *)dst;
/* just in case */
- if ((ifp->if_flags & IFF_UP) == 0) {
+ if ((ifnet_flags(ifp) & IFF_UP) == 0) {
printf("stf: IFF_DOWN\n");
return ENETDOWN;
}
return ENETDOWN;
}
- if (m->m_len < sizeof(*ip6)) {
+ if (mbuf_len(m) < sizeof(*ip6)) {
m = m_pullup(m, sizeof(*ip6));
- if (!m)
+ if (!m) {
+ *m0 = NULL; /* makes sure this won't be double freed */
+ IFA_REMREF(&ia6->ia_ifa);
return ENOBUFS;
+ }
}
ip6 = mtod(m, struct ip6_hdr *);
tos = (ntohl(ip6->ip6_flow) >> 20) & 0xff;
* Pickup the right outer dst addr from the list of candidates.
* ip6_dst has priority as it may be able to give us shorter IPv4 hops.
*/
- if (IN6_IS_ADDR_6TO4(&ip6->ip6_dst))
+ if (IN6_IS_ADDR_6TO4(&ip6->ip6_dst)) {
in4 = GET_V4(&ip6->ip6_dst);
- else if (IN6_IS_ADDR_6TO4(&dst6->sin6_addr))
+ } else if (IN6_IS_ADDR_6TO4(&dst6->sin6_addr)) {
in4 = GET_V4(&dst6->sin6_addr);
- else {
+ } else {
+ IFA_REMREF(&ia6->ia_ifa);
return ENETUNREACH;
}
if (ifp->if_bpf) {
- /*
- * We need to prepend the address family as
- * a four byte field. Cons up a dummy header
- * to pacify bpf. This is safe because bpf
- * will only read from the mbuf (i.e., it won't
- * try to free it or keep a pointer a to it).
- */
- struct mbuf m0;
+ /* We need to prepend the address family as a four byte field. */
u_int32_t af = AF_INET6;
-
- m0.m_next = m;
- m0.m_len = 4;
- m0.m_data = (char *)⁡
-
- bpf_mtap(ifp, &m0);
+
+ bpf_tap_out(ifp, 0, m, &af, sizeof(af));
}
- M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
- if (m && m->m_len < sizeof(struct ip))
+ M_PREPEND(m, sizeof(struct ip), M_DONTWAIT, 1);
+ if (m && mbuf_len(m) < sizeof(struct ip)) {
m = m_pullup(m, sizeof(struct ip));
- if (m == NULL)
+ }
+ if (m == NULL) {
+ *m0 = NULL;
+ IFA_REMREF(&ia6->ia_ifa);
return ENOBUFS;
+ }
ip = mtod(m, struct ip *);
bzero(ip, sizeof(*ip));
+ IFA_LOCK_SPIN(&ia6->ia_ifa);
bcopy(GET_V4(&((struct sockaddr_in6 *)&ia6->ia_addr)->sin6_addr),
&ip->ip_src, sizeof(ip->ip_src));
+ IFA_UNLOCK(&ia6->ia_ifa);
bcopy(in4, &ip->ip_dst, sizeof(ip->ip_dst));
ip->ip_p = IPPROTO_IPV6;
ip->ip_ttl = ip_stf_ttl;
- ip->ip_len = m->m_pkthdr.len; /*host order*/
- if (ifp->if_flags & IFF_LINK1)
- ip_ecn_ingress(ECN_ALLOWED, &ip->ip_tos, &tos);
- else
+ ip->ip_len = m->m_pkthdr.len; /*host order*/
+ if (ifp->if_flags & IFF_LINK1) {
+ ip_ecn_ingress(ECN_NORMAL, &ip->ip_tos, &tos);
+ } else {
ip_ecn_ingress(ECN_NOCARE, &ip->ip_tos, &tos);
+ }
- dst4 = (struct sockaddr_in *)&sc->sc_ro.ro_dst;
- if (dst4->sin_family != AF_INET ||
+ lck_mtx_lock(&sc->sc_ro_mtx);
+ dst4 = (struct sockaddr_in *)(void *)&sc->sc_ro.ro_dst;
+ if (ROUTE_UNUSABLE(&sc->sc_ro) || dst4->sin_family != AF_INET ||
bcmp(&dst4->sin_addr, &ip->ip_dst, sizeof(ip->ip_dst)) != 0) {
- /* cache route doesn't match */
+ ROUTE_RELEASE(&sc->sc_ro);
+ /* cache route doesn't match: always the case during the first use */
dst4->sin_family = AF_INET;
dst4->sin_len = sizeof(struct sockaddr_in);
bcopy(&ip->ip_dst, &dst4->sin_addr, sizeof(dst4->sin_addr));
- if (sc->sc_ro.ro_rt) {
- RTFREE(sc->sc_ro.ro_rt);
- sc->sc_ro.ro_rt = NULL;
- }
}
- if (sc->sc_ro.ro_rt == NULL) {
- rtalloc(&sc->sc_ro);
- if (sc->sc_ro.ro_rt == NULL) {
- return ENETUNREACH;
- }
- }
+ result = ip_output(m, NULL, &sc->sc_ro, IP_OUTARGS, NULL, &ipoa);
+ lck_mtx_unlock(&sc->sc_ro_mtx);
- error = ip_output(m, NULL, &sc->sc_ro, 0, NULL);
- if (error == 0)
- return EJUSTRETURN;
+ /* Assumption: ip_output will free mbuf on errors */
+ /* All the output processing is done here, don't let stf_output be called */
+ if (result == 0) {
+ result = EJUSTRETURN;
+ }
+ *m0 = NULL;
+ IFA_REMREF(&ia6->ia_ifa);
+ return result;
+}
+static errno_t
+stf_output(
+ __unused ifnet_t ifp,
+ __unused mbuf_t m)
+{
+ /* All processing is done in stf_pre_output
+ * this shouldn't be called as the pre_output returns "EJUSTRETURN"
+ */
+ return 0;
}
static int
-stf_checkaddr4(sc, in, inifp)
- struct stf_softc *sc;
- struct in_addr *in;
- struct ifnet *inifp; /* incoming interface */
+stf_checkaddr4(
+ struct stf_softc *sc,
+ const struct in_addr *in,
+ struct ifnet *inifp) /* incoming interface */
{
struct in_ifaddr *ia4;
* reject packets with the following address:
* 224.0.0.0/4 0.0.0.0/8 127.0.0.0/8 255.0.0.0/8
*/
- if (IN_MULTICAST(ntohl(in->s_addr)))
+ if (IN_MULTICAST(ntohl(in->s_addr))) {
return -1;
+ }
switch ((ntohl(in->s_addr) & 0xff000000) >> 24) {
case 0: case 127: case 255:
return -1;
/*
* reject packets with broadcast
*/
+ lck_rw_lock_shared(in_ifaddr_rwlock);
for (ia4 = TAILQ_FIRST(&in_ifaddrhead);
- ia4;
- ia4 = TAILQ_NEXT(ia4, ia_link))
- {
- if ((ia4->ia_ifa.ifa_ifp->if_flags & IFF_BROADCAST) == 0)
+ ia4;
+ ia4 = TAILQ_NEXT(ia4, ia_link)) {
+ IFA_LOCK(&ia4->ia_ifa);
+ if ((ia4->ia_ifa.ifa_ifp->if_flags & IFF_BROADCAST) == 0) {
+ IFA_UNLOCK(&ia4->ia_ifa);
continue;
- if (in->s_addr == ia4->ia_broadaddr.sin_addr.s_addr)
+ }
+ if (in->s_addr == ia4->ia_broadaddr.sin_addr.s_addr) {
+ IFA_UNLOCK(&ia4->ia_ifa);
+ lck_rw_done(in_ifaddr_rwlock);
return -1;
+ }
+ IFA_UNLOCK(&ia4->ia_ifa);
}
+ lck_rw_done(in_ifaddr_rwlock);
/*
* perform ingress filter
*/
- if (sc && (sc->sc_if.if_flags & IFF_LINK2) == 0 && inifp) {
+ if (sc && (ifnet_flags(sc->sc_if) & IFF_LINK2) == 0 && inifp) {
struct sockaddr_in sin;
struct rtentry *rt;
sin.sin_family = AF_INET;
sin.sin_len = sizeof(struct sockaddr_in);
sin.sin_addr = *in;
- rt = rtalloc1((struct sockaddr *)&sin, 0, 0UL);
- if (!rt || rt->rt_ifp != inifp) {
+ rt = rtalloc1((struct sockaddr *)&sin, 0, 0);
+ if (rt != NULL) {
+ RT_LOCK(rt);
+ }
+ if (rt == NULL || rt->rt_ifp != inifp) {
#if 1
log(LOG_WARNING, "%s: packet from 0x%x dropped "
- "due to ingress filter\n", if_name(&sc->sc_if),
+ "due to ingress filter\n", if_name(sc->sc_if),
(u_int32_t)ntohl(sin.sin_addr.s_addr));
#endif
- if (rt)
+ if (rt != NULL) {
+ RT_UNLOCK(rt);
rtfree(rt);
+ }
return -1;
}
+ RT_UNLOCK(rt);
rtfree(rt);
}
}
static int
-stf_checkaddr6(sc, in6, inifp)
- struct stf_softc *sc;
- struct in6_addr *in6;
- struct ifnet *inifp; /* incoming interface */
+stf_checkaddr6(
+ struct stf_softc *sc,
+ struct in6_addr *in6,
+ struct ifnet *inifp) /* incoming interface */
{
/*
* check 6to4 addresses
*/
- if (IN6_IS_ADDR_6TO4(in6))
+ if (IN6_IS_ADDR_6TO4(in6)) {
return stf_checkaddr4(sc, GET_V4(in6), inifp);
+ }
/*
* reject anything that look suspicious. the test is implemented
* (1) reject bad packets earlier, and
* (2) to be safe against future ip6_input change.
*/
- if (IN6_IS_ADDR_V4COMPAT(in6) || IN6_IS_ADDR_V4MAPPED(in6))
+ if (IN6_IS_ADDR_V4COMPAT(in6) || IN6_IS_ADDR_V4MAPPED(in6)) {
return -1;
+ }
return 0;
}
-void
-in_stf_input(m, off)
- struct mbuf *m;
- int off;
+static void
+in_stf_input(
+ struct mbuf *m,
+ int off)
{
struct stf_softc *sc;
struct ip *ip;
- struct ip6_hdr *ip6;
+ struct ip6_hdr ip6;
u_int8_t otos, itos;
- int s, isr, proto;
- struct ifqueue *ifq = NULL;
+ int proto;
struct ifnet *ifp;
+ struct ifnet_stat_increment_param stats;
ip = mtod(m, struct ip *);
proto = ip->ip_p;
-
if (proto != IPPROTO_IPV6) {
m_freem(m);
return;
sc = (struct stf_softc *)encap_getarg(m);
- if (sc == NULL || (sc->sc_if.if_flags & IFF_UP) == 0) {
+ if (sc == NULL || (ifnet_flags(sc->sc_if) & IFF_UP) == 0) {
m_freem(m);
return;
}
- ifp = &sc->sc_if;
+ ifp = sc->sc_if;
+
+#if MAC_LABEL
+ mac_mbuf_label_associate_ifnet(ifp, m);
+#endif
/*
* perform sanity check against outer src/dst.
}
otos = ip->ip_tos;
- m_adj(m, off);
-
- if (m->m_len < sizeof(*ip6)) {
- m = m_pullup(m, sizeof(*ip6));
- if (!m)
- return;
- }
- ip6 = mtod(m, struct ip6_hdr *);
+ mbuf_copydata(m, off, sizeof(ip6), &ip6);
/*
* perform sanity check against inner src/dst.
* for source, perform ingress filter as well.
*/
- if (stf_checkaddr6(sc, &ip6->ip6_dst, NULL) < 0 ||
- stf_checkaddr6(sc, &ip6->ip6_src, m->m_pkthdr.rcvif) < 0) {
+ if (stf_checkaddr6(sc, &ip6.ip6_dst, NULL) < 0 ||
+ stf_checkaddr6(sc, &ip6.ip6_src, m->m_pkthdr.rcvif) < 0) {
m_freem(m);
return;
}
- itos = (ntohl(ip6->ip6_flow) >> 20) & 0xff;
- if ((ifp->if_flags & IFF_LINK1) != 0)
- ip_ecn_egress(ECN_ALLOWED, &otos, &itos);
- else
+ itos = (ntohl(ip6.ip6_flow) >> 20) & 0xff;
+ if ((ifnet_flags(ifp) & IFF_LINK1) != 0) {
+ ip_ecn_egress(ECN_NORMAL, &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);
+ }
+ ip6.ip6_flow &= ~htonl(0xff << 20);
+ ip6.ip6_flow |= htonl((u_int32_t)itos << 20);
m->m_pkthdr.rcvif = ifp;
-
+ mbuf_pkthdr_setheader(m, mbuf_data(m));
+ mbuf_adj(m, off);
+
if (ifp->if_bpf) {
- /*
- * We need to prepend the address family as
- * a four byte field. Cons up a dummy header
- * to pacify bpf. This is safe because bpf
- * will only read from the mbuf (i.e., it won't
- * try to free it or keep a pointer a to it).
- */
- struct mbuf m0;
+ /* We need to prepend the address family as a four byte field. */
u_int32_t af = AF_INET6;
-
- m0.m_next = m;
- m0.m_len = 4;
- m0.m_data = (char *)⁡
-
-#ifdef HAVE_OLD_BPF
- bpf_mtap(ifp, &m0);
-#else
- bpf_mtap(ifp->if_bpf, &m0);
-#endif
+ bpf_tap_in(ifp, 0, m, &af, sizeof(af));
}
/*
* See net/if_gif.c for possible issues with packet processing
* reorder due to extra queueing.
*/
- ifq = &ip6intrq;
- isr = NETISR_IPV6;
+ bzero(&stats, sizeof(stats));
+ stats.packets_in = 1;
+ stats.bytes_in = mbuf_pkthdr_len(m);
+ mbuf_pkthdr_setrcvif(m, ifp);
+ ifnet_input(ifp, m, &stats);
- s = splimp();
- if (IF_QFULL(ifq)) {
- IF_DROP(ifq); /* update statistics */
- m_freem(m);
- splx(s);
- return;
- }
- IF_ENQUEUE(ifq, m);
- schednetisr(isr);
- ifp->if_ipackets++;
- ifp->if_ibytes += m->m_pkthdr.len;
- splx(s);
+ return;
}
-/* ARGSUSED */
static void
-stf_rtrequest(cmd, rt, sa)
- int cmd;
- struct rtentry *rt;
- struct sockaddr *sa;
+stf_rtrequest(
+ __unused int cmd,
+ struct rtentry *rt,
+ __unused struct sockaddr *sa)
{
-
- if (rt)
+ if (rt != NULL) {
+ RT_LOCK_ASSERT_HELD(rt);
rt->rt_rmx.rmx_mtu = IPV6_MMTU;
+ }
}
-int
-stf_ioctl(ifp, cmd, data)
- struct ifnet *ifp;
- u_long cmd;
- void *data;
+static errno_t
+stf_ioctl(
+ ifnet_t ifp,
+ u_long cmd,
+ void *data)
{
struct ifaddr *ifa;
struct ifreq *ifr;
switch (cmd) {
case SIOCSIFADDR:
ifa = (struct ifaddr *)data;
- if (ifa == NULL || ifa->ifa_addr->sa_family != AF_INET6) {
+ if (ifa == NULL) {
+ error = EAFNOSUPPORT;
+ break;
+ }
+ IFA_LOCK(ifa);
+ if (ifa->ifa_addr->sa_family != AF_INET6) {
+ IFA_UNLOCK(ifa);
error = EAFNOSUPPORT;
break;
}
- sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
+ sin6 = (struct sockaddr_in6 *)(void *)ifa->ifa_addr;
if (IN6_IS_ADDR_6TO4(&sin6->sin6_addr)) {
- ifa->ifa_rtrequest = stf_rtrequest;
- ifp->if_flags |= IFF_UP;
- } else
+ if (!(ifnet_flags( ifp ) & IFF_UP)) {
+ /* do this only if the interface is not already up */
+ ifa->ifa_rtrequest = stf_rtrequest;
+ IFA_UNLOCK(ifa);
+ ifnet_set_flags(ifp, IFF_UP, IFF_UP);
+ } else {
+ IFA_UNLOCK(ifa);
+ }
+ } else {
+ IFA_UNLOCK(ifa);
error = EINVAL;
+ }
+ IFA_LOCK_ASSERT_NOTHELD(ifa);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
ifr = (struct ifreq *)data;
- if (ifr && ifr->ifr_addr.sa_family == AF_INET6)
+ if (ifr && ifr->ifr_addr.sa_family == AF_INET6) {
;
- else
+ } else {
error = EAFNOSUPPORT;
+ }
break;
default:
- error = EINVAL;
+ error = EOPNOTSUPP;
break;
}
projects / apple / xnu.git / blobdiff