/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2020 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @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 OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * 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@
*/
-/* $KAME: if_gif.c,v 1.15 2000/02/22 14:01:46 itojun Exp $ */
+/* $FreeBSD: src/sys/net/if_gif.c,v 1.4.2.6 2001/07/24 19:10:18 brooks Exp $ */
+/* $KAME: if_gif.c,v 1.47 2001/05/01 05:28:42 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
-
/*
- * gif.c
+ * 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.
*/
-#if BSD310
-#include "opt_inet.h"
-#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/syslog.h>
+#include <sys/protosw.h>
#include <kern/cpu_number.h>
+#include <kern/zalloc.h>
#include <net/if.h>
#include <net/if_types.h>
-#include <net/netisr.h>
#include <net/route.h>
#include <net/bpf.h>
+#include <net/kpi_protocol.h>
+#include <net/kpi_interface.h>
+#include <net/init.h>
-#if INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
-#include <netinet/in_var.h>
#include <netinet/ip.h>
+#if INET
+#include <netinet/in_var.h>
#include <netinet/in_gif.h>
-#endif /* INET */
+#include <netinet/ip_var.h>
+#endif /* INET */
#if INET6
-#ifndef INET
-#include <netinet/in.h>
-#endif
#include <netinet6/in6_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <net/dlil.h>
#include <net/if_gif.h>
-#include "gif.h"
-#include "bpfilter.h"
-
#include <net/net_osdep.h>
-#if NGIF > 0
+#if CONFIG_MACF_NET
+#include <security/mac_framework.h>
+#endif
-void gifattach __P((void *));
-int gif_pre_output __P((struct ifnet *, register struct mbuf **, struct sockaddr *,
- register struct rtentry *, char *, char *, u_long));
+#define GIFNAME "gif"
+#define GIFDEV "if_gif"
-/*
- * gif global variable definitions
- */
-int ngif = NGIF; /* number of interfaces */
-struct gif_softc *gif = 0;
-static struct if_proto *gif_array[NGIF];
-static gif_count = 0 ;
-#ifndef MAX_GIF_NEST
-/*
- * This macro controls the upper limitation on nesting of gif tunnels.
- * Since, setting a large value to this macro with a careless configuration
- * may introduce system crash, we don't allow any nestings by default.
- * If you need to configure nested gif tunnels, you can define this macro
- * in your kernel configuration file. However, if you do so, please be
- * careful to configure the tunnels so that it won't make a loop.
- */
-#define MAX_GIF_NEST 1
+#define GIF_MAXUNIT IF_MAXUNIT
+#define GIF_ZONE_MAX_ELEM MIN(IFNETS_MAX, GIF_MAXUNIT)
+
+/* gif lock variables */
+static lck_grp_t *gif_mtx_grp;
+static lck_grp_attr_t *gif_mtx_grp_attr;
+static lck_attr_t *gif_mtx_attr;
+decl_lck_mtx_data(static, gif_mtx_data);
+static lck_mtx_t *gif_mtx = &gif_mtx_data;
+
+TAILQ_HEAD(gifhead, gif_softc) gifs = TAILQ_HEAD_INITIALIZER(gifs);
+
+static int gif_encapcheck(const struct mbuf *, int, int, void *);
+static errno_t gif_output(ifnet_t ifp, mbuf_t m);
+static errno_t gif_input(ifnet_t ifp, protocol_family_t protocol_family,
+ mbuf_t m, char *frame_header);
+static errno_t gif_ioctl(ifnet_t ifp, u_long cmd, void *data);
+
+static int ngif = 0; /* number of interfaces */
+
+#if INET
+static struct protosw in_gif_protosw =
+{
+ .pr_type = SOCK_RAW,
+ .pr_protocol = 0, /* IPPROTO_IPV[46] */
+ .pr_flags = PR_ATOMIC | PR_ADDR,
+ .pr_input = in_gif_input,
+ .pr_usrreqs = &rip_usrreqs,
+ .pr_unlock = rip_unlock,
+};
+#endif
+#if INET6
+static struct ip6protosw in6_gif_protosw =
+{
+ .pr_type = SOCK_RAW,
+ .pr_protocol = 0, /* IPPROTO_IPV[46] */
+ .pr_flags = PR_ATOMIC | PR_ADDR,
+ .pr_input = in6_gif_input,
+ .pr_usrreqs = &rip6_usrreqs,
+ .pr_unlock = rip_unlock,
+};
#endif
-static int max_gif_nesting = MAX_GIF_NEST;
+static int gif_remove(struct ifnet *);
+static int gif_clone_create(struct if_clone *, uint32_t, void *);
+static int gif_clone_destroy(struct ifnet *);
+static void gif_delete_tunnel(struct gif_softc *);
+static void gif_detach(struct ifnet *);
+static struct if_clone gif_cloner =
+ IF_CLONE_INITIALIZER(GIFNAME, gif_clone_create, gif_clone_destroy,
+ 0, GIF_MAXUNIT, GIF_ZONE_MAX_ELEM, sizeof(struct gif_softc));
+/*
+ * Theory of operation: initially, one gif interface is created.
+ * Any time a gif interface is configured, if there are no other
+ * unconfigured gif interfaces, a new gif interface is created.
+ * BSD uses the clone mechanism to dynamically create more
+ * gif interfaces.
+ *
+ * We have some extra glue to support DLIL.
+ */
-#if 0
-int gif_demux(ifp, m, frame_header, proto)
- struct ifnet *ifp;
- struct mbuf *m;
- char *frame_header;
- struct if_proto **proto;
+/* GIF interface module support */
+static int
+gif_demux(
+ ifnet_t ifp,
+ __unused mbuf_t m,
+ __unused char *frame_header,
+ protocol_family_t *protocol_family)
{
- int i;
- return 0;
+ struct gif_softc *sc = ifnet_softc(ifp);
+
+ GIF_LOCK(sc);
+ /* Only one protocol may be attached to a gif interface. */
+ *protocol_family = sc->gif_proto;
+ GIF_UNLOCK(sc);
+
+ return 0;
}
-int gif_framer(ifp, m, dest, dest_linkaddr, frame_type)
- struct ifnet *ifp;
- struct mbuf **m;
- struct sockaddr *dest;
- char *dest_linkaddr;
- char *frame_type;
-
-{
- char *to_ptr;
-
- return 0;
+static errno_t
+gif_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 gif_softc *sc = ifnet_softc(ifp);
+
+ GIF_LOCK(sc);
+ if (sc->gif_proto != 0) {
+ printf("gif_add_proto: request add_proto for gif%d\n",
+ ifnet_unit(ifp));
+ }
+
+ sc->gif_proto = protocol_family;
+ GIF_UNLOCK(sc);
+
+ return 0;
}
-#endif
-static
-int gif_add_if(struct ifnet *ifp)
-{
- ifp->if_demux = 0;
- ifp->if_framer = 0;
- return 0;
-}
-
-static
-int gif_del_if(struct ifnet *ifp)
-{
- return 0;
-}
-
-static
-int gif_add_proto(struct ddesc_head_str *desc_head, struct if_proto *proto, u_long dl_tag)
-{
- int i;
-
- for (i=0; i < gif_count; i++)
- if (gif_array[i] == 0) {
- gif_array[gif_count] = proto;
- return 0;
- }
-
- if ((i == gif_count) && (gif_count == NGIF))
- panic("gif_add_proto -- Too many attachments\n");
-
- gif_array[gif_count++] = proto;
-
- return (0);
+
+static errno_t
+gif_del_proto(
+ ifnet_t ifp,
+ protocol_family_t protocol_family)
+{
+ struct gif_softc *sc = ifnet_softc(ifp);
+
+ GIF_LOCK(sc);
+ if (sc->gif_proto == protocol_family) {
+ sc->gif_proto = 0;
+ }
+ GIF_UNLOCK(sc);
+
+ return 0;
}
-static
-int gif_del_proto(struct if_proto *proto, u_long dl_tag)
-{
- int i;
+/* Glue code to attach inet to a gif interface through DLIL */
+static errno_t
+gif_attach_proto_family(
+ ifnet_t ifp,
+ protocol_family_t protocol_family)
+{
+ struct ifnet_attach_proto_param reg;
+ errno_t stat;
+
+ bzero(®, sizeof(reg));
+ reg.input = gif_input;
- for (i=0; i < gif_count; i++)
- if (gif_array[i] == proto) {
- gif_array[i] = 0;
- return 0;
- }
+ stat = ifnet_attach_protocol(ifp, protocol_family, ®);
+ if (stat && stat != EEXIST) {
+ printf("gif_attach_proto_family can't attach interface \
+ fam=%d\n", protocol_family);
+ }
- return ENOENT;
+ return stat;
}
-int gif_shutdown()
+/* Function to setup the first gif interface */
+void
+gif_init(void)
{
- return 0;
+ errno_t result;
+
+ /* Initialize the list of interfaces */
+ TAILQ_INIT(&gifs);
+
+ /* Initialize the gif global lock */
+ gif_mtx_grp_attr = lck_grp_attr_alloc_init();
+ gif_mtx_grp = lck_grp_alloc_init("gif", gif_mtx_grp_attr);
+ gif_mtx_attr = lck_attr_alloc_init();
+ lck_mtx_init(gif_mtx, gif_mtx_grp, gif_mtx_attr);
+
+ /* Register protocol registration functions */
+ result = proto_register_plumber(PF_INET, APPLE_IF_FAM_GIF,
+ gif_attach_proto_family, NULL);
+ if (result != 0) {
+ printf("proto_register_plumber failed for AF_INET error=%d\n",
+ result);
+ }
+
+ result = proto_register_plumber(PF_INET6, APPLE_IF_FAM_GIF,
+ gif_attach_proto_family, NULL);
+ if (result != 0) {
+ printf("proto_register_plumber failed for AF_INET6 error=%d\n",
+ result);
+ }
+
+ result = if_clone_attach(&gif_cloner);
+ if (result != 0) {
+ panic("%s: if_clone_attach() failed, error %d\n", __func__, result);
+ }
+
+ gif_clone_create(&gif_cloner, 0, NULL);
}
-void gif_reg_if_mods()
+static errno_t
+gif_set_bpf_tap(
+ ifnet_t ifp,
+ bpf_tap_mode mode,
+ bpf_packet_func callback)
{
- struct dlil_ifmod_reg_str gif_ifmod;
+ struct gif_softc *sc = ifnet_softc(ifp);
- gif_ifmod.add_if = gif_add_if;
- gif_ifmod.del_if = gif_del_if;
- gif_ifmod.add_proto = gif_add_proto;
- gif_ifmod.del_proto = gif_del_proto;
- gif_ifmod.ifmod_ioctl = 0;
- gif_ifmod.shutdown = gif_shutdown;
+ GIF_LOCK(sc);
+ sc->tap_mode = mode;
+ sc->tap_callback = callback;
+ GIF_UNLOCK(sc);
- if (dlil_reg_if_modules(APPLE_IF_FAM_GIF, &gif_ifmod))
- panic("Couldn't register gif modules\n");
+ return 0;
+}
-}
+static void
+gif_detach(struct ifnet *ifp)
+{
+ struct gif_softc *sc = ifp->if_softc;
+ lck_mtx_destroy(&sc->gif_lock, gif_mtx_grp);
+ if_clone_softc_deallocate(&gif_cloner, sc);
+ ifp->if_softc = NULL;
+ (void) ifnet_release(ifp);
+}
-u_long gif_attach_inet(struct ifnet *ifp)
+static int
+gif_clone_create(struct if_clone *ifc, uint32_t unit, __unused void *params)
{
- struct dlil_proto_reg_str reg;
- struct dlil_demux_desc desc;
- u_long dl_tag=0;
- short native=0;
- int stat;
- int i;
-
- for (i=0; i < gif_count; i++) {
- if (gif_array[i] && (gif_array[i]->ifp == ifp) &&
- (gif_array[i]->protocol_family == PF_INET)) {
+ struct gif_softc *sc = NULL;
+ struct ifnet_init_eparams gif_init_params;
+ errno_t error = 0;
+
+ lck_mtx_lock(gif_mtx);
+
+ /* Can't create more than GIF_MAXUNIT */
+ if (ngif >= GIF_MAXUNIT) {
+ error = ENXIO;
+ goto done;
+ }
+
+ sc = if_clone_softc_allocate(&gif_cloner);
+ if (sc == NULL) {
+ log(LOG_ERR, "gif_clone_create: failed to allocate gif%d\n",
+ unit);
+ error = ENOBUFS;
+ goto done;
+ }
+
+ /* use the interface name as the unique id for ifp recycle */
+ snprintf(sc->gif_ifname, sizeof(sc->gif_ifname), "%s%d",
+ ifc->ifc_name, unit);
+
+ lck_mtx_init(&sc->gif_lock, gif_mtx_grp, gif_mtx_attr);
+
+ bzero(&gif_init_params, sizeof(gif_init_params));
+ gif_init_params.ver = IFNET_INIT_CURRENT_VERSION;
+ gif_init_params.len = sizeof(gif_init_params);
+ gif_init_params.flags = IFNET_INIT_LEGACY;
+ gif_init_params.uniqueid = sc->gif_ifname;
+ gif_init_params.uniqueid_len = strlen(sc->gif_ifname);
+ gif_init_params.name = GIFNAME;
+ gif_init_params.unit = unit;
+ gif_init_params.type = IFT_GIF;
+ gif_init_params.family = IFNET_FAMILY_GIF;
+ gif_init_params.output = gif_output;
+ gif_init_params.demux = gif_demux;
+ gif_init_params.add_proto = gif_add_proto;
+ gif_init_params.del_proto = gif_del_proto;
+ gif_init_params.softc = sc;
+ gif_init_params.ioctl = gif_ioctl;
+ gif_init_params.set_bpf_tap = gif_set_bpf_tap;
+ gif_init_params.detach = gif_detach;
+
+ error = ifnet_allocate_extended(&gif_init_params, &sc->gif_if);
+ if (error != 0) {
+ printf("gif_clone_create, ifnet_allocate failed - %d\n", error);
+ if_clone_softc_deallocate(&gif_cloner, sc);
+ error = ENOBUFS;
+ goto done;
+ }
+
+ sc->encap_cookie4 = sc->encap_cookie6 = NULL;
+#if INET
+ sc->encap_cookie4 = encap_attach_func(AF_INET, -1,
+ gif_encapcheck, &in_gif_protosw, sc);
+ if (sc->encap_cookie4 == NULL) {
+ printf("%s: unable to attach encap4\n", if_name(sc->gif_if));
+ ifnet_release(sc->gif_if);
+ if_clone_softc_deallocate(&gif_cloner, sc);
+ error = ENOBUFS;
+ goto done;
+ }
+#endif
+#if INET6
+ sc->encap_cookie6 = encap_attach_func(AF_INET6, -1,
+ gif_encapcheck, (struct protosw *)&in6_gif_protosw, sc);
+ if (sc->encap_cookie6 == NULL) {
+ if (sc->encap_cookie4) {
+ encap_detach(sc->encap_cookie4);
+ sc->encap_cookie4 = NULL;
+ }
+ printf("%s: unable to attach encap6\n", if_name(sc->gif_if));
+ ifnet_release(sc->gif_if);
+ if_clone_softc_deallocate(&gif_cloner, sc);
+ error = ENOBUFS;
+ goto done;
+ }
+#endif
+ sc->gif_called = 0;
+ ifnet_set_mtu(sc->gif_if, GIF_MTU);
+ ifnet_set_flags(sc->gif_if, IFF_POINTOPOINT | IFF_MULTICAST, 0xffff);
#if 0
- kprintf("gif_attach for %s%d found dl_tag=%d\n",
- ifp->if_name, ifp->if_unit, gif_array[i]->dl_tag);
+ /* turn off ingress filter */
+ sc->gif_if.if_flags |= IFF_LINK2;
#endif
- return gif_array[i]->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 = gif_input;
- reg.pre_output = gif_pre_output;
- reg.event = 0;
- reg.offer = 0;
- reg.ioctl = gif_ioctl;
- reg.default_proto = 0;
- reg.protocol_family = PF_INET;
-
- stat = dlil_attach_protocol(®, &dl_tag);
- if (stat) {
- panic("gif_attach_inet can't attach interface\n");
- }
-
- return dl_tag;
+ sc->gif_flags |= IFGIF_DETACHING;
+ error = ifnet_attach(sc->gif_if, NULL);
+ if (error != 0) {
+ printf("gif_clone_create - ifnet_attach failed - %d\n", error);
+ ifnet_release(sc->gif_if);
+ if (sc->encap_cookie4) {
+ encap_detach(sc->encap_cookie4);
+ sc->encap_cookie4 = NULL;
+ }
+ if (sc->encap_cookie6) {
+ encap_detach(sc->encap_cookie6);
+ sc->encap_cookie6 = NULL;
+ }
+ if_clone_softc_deallocate(&gif_cloner, sc);
+ goto done;
+ }
+#if CONFIG_MACF_NET
+ mac_ifnet_label_init(&sc->gif_if);
+#endif
+ bpfattach(sc->gif_if, DLT_NULL, sizeof(u_int));
+ sc->gif_flags &= ~IFGIF_DETACHING;
+ TAILQ_INSERT_TAIL(&gifs, sc, gif_link);
+ ngif++;
+done:
+ lck_mtx_unlock(gif_mtx);
+
+ return error;
}
-void
-gifattach(dummy)
- void *dummy;
+static int
+gif_remove(struct ifnet *ifp)
{
- register struct gif_softc *sc;
- register int i;
-
- gif_reg_if_mods(); /* DLIL modules */
-
- gif = sc = _MALLOC (ngif * sizeof(struct gif_softc), M_DEVBUF, M_WAIT);
- bzero(sc, ngif * sizeof(struct gif_softc));
- for (i = 0; i < ngif; sc++, i++) {
- sc->gif_if.if_name = "gif";
- sc->gif_if.if_unit = i;
- sc->gif_if.if_family = APPLE_IF_FAM_GIF;
- sc->gif_if.if_mtu = GIF_MTU;
- sc->gif_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
- sc->gif_if.if_ioctl = gif_ioctl;
- sc->gif_if.if_output = NULL;
- sc->gif_if.if_type = IFT_GIF;
- dlil_if_attach(&sc->gif_if);
-#if 0
- kprintf("gifattach: Attaching gif%d sc=%x gif_if=%x\n", i, sc, &sc->gif_if);
-#endif
-#if NBPFILTER > 0
-#ifdef HAVE_OLD_BPF
- bpfattach(&sc->gif_if, DLT_NULL, sizeof(u_int));
-#else
- bpfattach(&sc->gif_if.if_bpf, &sc->gif_if, DLT_NULL, sizeof(u_int));
+ int error = 0;
+ struct gif_softc *sc = NULL;
+ const struct encaptab *encap_cookie4 = NULL;
+ const struct encaptab *encap_cookie6 = NULL;
+
+ lck_mtx_lock(gif_mtx);
+ sc = ifp->if_softc;
+
+ if (sc == NULL) {
+ error = EINVAL;
+ goto done;
+ }
+
+ GIF_LOCK(sc);
+ if (sc->gif_flags & IFGIF_DETACHING) {
+ error = EINVAL;
+ goto done;
+ }
+
+ sc->gif_flags |= IFGIF_DETACHING;
+ TAILQ_REMOVE(&gifs, sc, gif_link);
+ ngif--;
+
+ gif_delete_tunnel(sc);
+#ifdef INET6
+ encap_cookie6 = sc->encap_cookie6;
#endif
+#ifdef INET
+ encap_cookie4 = sc->encap_cookie4;
#endif
+done:
+ if (sc != NULL) {
+ GIF_UNLOCK(sc);
}
+ lck_mtx_unlock(gif_mtx);
+
+ if (encap_cookie6 != NULL) {
+ error = encap_detach(encap_cookie6);
+ KASSERT(error == 0, ("gif_clone_destroy: Unexpected "
+ "error detaching encap_cookie6"));
+ }
+
+ if (encap_cookie4 != NULL) {
+ error = encap_detach(encap_cookie4);
+ KASSERT(error == 0, ("gif_clone_destroy: Unexpected "
+ "error detaching encap_cookie4"));
+ }
+
+ return error;
}
-#ifdef __FreeBSD__
-PSEUDO_SET(gifattach, if_gif);
-#endif
+static int
+gif_clone_destroy(struct ifnet *ifp)
+{
+ int error = 0;
+
+ error = gif_remove(ifp);
+ if (error != 0) {
+ printf("gif_clone_destroy: gif remove failed %d\n", error);
+ return error;
+ }
-int
-gif_pre_output(ifp, m0, dst, rt, frame, address, dl_tag)
- struct ifnet *ifp;
- struct mbuf **m0;
- struct sockaddr *dst;
- struct rtentry *rt; /* added in net2 */
- char *frame;
- char *address;
- u_long dl_tag;
+ error = ifnet_set_flags(ifp, 0, IFF_UP);
+ if (error != 0) {
+ printf("gif_clone_destroy: ifnet_set_flags failed %d\n", error);
+ }
+
+ error = ifnet_detach(ifp);
+ if (error != 0) {
+ panic("gif_clone_destroy: ifnet_detach(%p) failed %d\n", ifp,
+ error);
+ }
+ return 0;
+}
+
+static int
+gif_encapcheck(
+ const struct mbuf *m,
+ int off,
+ int proto,
+ void *arg)
{
- register struct gif_softc *sc = (struct gif_softc*)ifp;
- register struct mbuf * m = *m0;
int error = 0;
- static int called = 0; /* XXX: MUTEX */
+ struct ip ip;
+ struct gif_softc *sc;
- /*
- * gif may cause infinite recursion calls when misconfigured.
- * We'll prevent this by introducing upper limit.
- * XXX: this mechanism may introduce another problem about
- * mutual exclusion of the variable CALLED, especially if we
- * use kernel thread.
- */
- if (++called > max_gif_nesting) {
- log(LOG_NOTICE,
- "gif_output: recursively called too many times(%d)\n",
- called);
- m_freem(m);
- error = EIO; /* is there better errno? */
- goto end;
+ sc = (struct gif_softc *)arg;
+ if (sc == NULL) {
+ return error;
}
- getmicrotime(&ifp->if_lastchange);
- m->m_flags &= ~(M_BCAST|M_MCAST);
- if (!(ifp->if_flags & IFF_UP) ||
-#if 0
- sc->gif_flags & GIFF_INUSE ||
-#endif
- sc->gif_psrc == NULL || sc->gif_pdst == NULL) {
- m_freem(m);
- error = ENETDOWN;
- printf("gif_output: packed discarded ENETDOWN\n");
- goto end;
+ GIF_LOCK(sc);
+ if ((ifnet_flags(sc->gif_if) & IFF_UP) == 0) {
+ goto done;
+ }
+
+ /* no physical address */
+ if (!sc->gif_psrc || !sc->gif_pdst) {
+ goto done;
}
-#if NBPFILTER > 0
- 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;
- u_int af = dst->sa_family;
-
- 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);
+ switch (proto) {
+#if INET
+ case IPPROTO_IPV4:
+ break;
#endif
+#if INET6
+ case IPPROTO_IPV6:
+ break;
+#endif
+ default:
+ goto done;
}
+
+ mbuf_copydata((struct mbuf *)(size_t)m, 0, sizeof(ip), &ip);
+
+ switch (ip.ip_v) {
+#if INET
+ case 4:
+ if (sc->gif_psrc->sa_family != AF_INET ||
+ sc->gif_pdst->sa_family != AF_INET) {
+ goto done;
+ }
+ error = gif_encapcheck4(m, off, proto, arg);
#endif
- ifp->if_opackets++;
- ifp->if_obytes += m->m_pkthdr.len;
-#if 0
- s = splnet();
- sc->gif_flags |= GIFF_INUSE;
+#if INET6
+ case 6:
+ if (sc->gif_psrc->sa_family != AF_INET6 ||
+ sc->gif_pdst->sa_family != AF_INET6) {
+ goto done;
+ }
+ error = gif_encapcheck6(m, off, proto, arg);
#endif
+ default:
+ goto done;
+ }
+done:
+ GIF_UNLOCK(sc);
+ return error;
+}
+
+static errno_t
+gif_output(
+ ifnet_t ifp,
+ mbuf_t m)
+{
+ struct gif_softc *sc = ifnet_softc(ifp);
+ struct sockaddr *gif_psrc;
+ struct sockaddr *gif_pdst;
+ int error = 0;
+
+ GIF_LOCK(sc);
+ gif_psrc = sc->gif_psrc;
+ gif_pdst = sc->gif_pdst;
+ GIF_UNLOCK(sc);
+
+ /*
+ * max_gif_nesting check used to live here. It doesn't anymore
+ * because there is no guaruntee that we won't be called
+ * concurrently from more than one thread.
+ */
+ m->m_flags &= ~(M_BCAST | M_MCAST);
+ if (!(ifnet_flags(ifp) & IFF_UP) ||
+ gif_psrc == NULL || gif_pdst == NULL) {
+ ifnet_touch_lastchange(ifp);
+ m_freem(m); /* free it here not in dlil_output */
+ error = ENETDOWN;
+ goto end;
+ }
+
+ bpf_tap_out(ifp, 0, m, &sc->gif_proto, sizeof(sc->gif_proto));
+
+ GIF_LOCK(sc);
+
+ /* inner AF-specific encapsulation */
+
+ /* XXX should we check if our outer source is legal? */
+
+ /*
+ * Save the length as m may be free by the output functions
+ * as they call m_pullup
+ */
+ u_int32_t bytes_out = m->m_pkthdr.len;
+ /* dispatch to output logic based on outer AF */
switch (sc->gif_psrc->sa_family) {
#if INET
case AF_INET:
- error = in_gif_output(ifp, dst->sa_family, m, rt);
- if (error)
- printf("in_gif_output returned error=%d\n", error);
+ error = in_gif_output(ifp, sc->gif_proto, m, NULL);
break;
#endif
#if INET6
case AF_INET6:
- error = in6_gif_output(ifp, dst->sa_family, m, rt);
- if (error)
- printf("in6_gif_output returned error=%d\n", error);
+ error = in6_gif_output(ifp, sc->gif_proto, m, NULL);
break;
#endif
default:
- m_freem(m);
error = ENETDOWN;
+ break;
}
-#if 0
- sc->gif_flags &= ~GIFF_INUSE;
- splx(s);
-#endif
- end:
- called = 0; /* reset recursion counter */
- if (error) ifp->if_oerrors++;
- return EJUSTRETURN;
+ GIF_UNLOCK(sc);
+end:
+ if (error) {
+ /* the mbuf was freed either by in_gif_output or in here */
+ ifnet_stat_increment_out(ifp, 0, 0, 1);
+ } else {
+ ifnet_stat_increment_out(ifp, 1, bytes_out, 0);
+ }
+ if (error == 0) {
+ error = EJUSTRETURN; /* if no error, packet got sent already */
+ }
+ return error;
}
-void
-gif_input(m, af, gifp)
- struct mbuf *m;
- int af;
- struct ifnet *gifp;
+/*
+ * gif_input is the input handler for IP and IPv6 attached to gif
+ */
+static errno_t
+gif_input(
+ ifnet_t ifp,
+ protocol_family_t protocol_family,
+ mbuf_t m,
+ __unused char *frame_header)
{
- int s, isr;
- register struct ifqueue *ifq = 0;
+ struct gif_softc *sc = ifnet_softc(ifp);
- if (gifp == NULL) {
- /* just in case */
- m_freem(m);
- return;
- }
-
- if (m->m_pkthdr.rcvif)
- m->m_pkthdr.rcvif = gifp;
-
-#if NBPFILTER > 0
- if (gifp->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;
- u_int af = AF_INET6;
-
- m0.m_next = m;
- m0.m_len = 4;
- m0.m_data = (char *)⁡
-
-#ifdef HAVE_OLD_BPF
- bpf_mtap(gifp, &m0);
-#else
- bpf_mtap(gifp->if_bpf, &m0);
-#endif
- }
-#endif /*NBPFILTER > 0*/
+ bpf_tap_in(ifp, 0, m, &sc->gif_proto, sizeof(sc->gif_proto));
/*
* Put the packet to the network layer input queue according to the
* it occurs more times than we thought, we may change the policy
* again.
*/
- switch (af) {
-#if INET
- case AF_INET:
- ifq = &ipintrq;
- isr = NETISR_IP;
- break;
-#endif
-#if INET6
- case AF_INET6:
- ifq = &ip6intrq;
- isr = NETISR_IPV6;
- break;
-#endif
- default:
- m_freem(m);
- return;
- }
-
- s = splimp();
- if (IF_QFULL(ifq)) {
- IF_DROP(ifq); /* update statistics */
+ int32_t pktlen = m->m_pkthdr.len;
+ if (proto_input(protocol_family, m) != 0) {
+ ifnet_stat_increment_in(ifp, 0, 0, 1);
m_freem(m);
- splx(s);
- return;
+ } else {
+ ifnet_stat_increment_in(ifp, 1, pktlen, 0);
}
- IF_ENQUEUE(ifq, m);
- /* we need schednetisr since the address family may change */
- schednetisr(isr);
- gifp->if_ipackets++;
- gifp->if_ibytes += m->m_pkthdr.len;
- splx(s);
- return;
+ return 0;
}
/* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */
-int
-gif_ioctl(ifp, cmd, data)
- struct ifnet *ifp;
- u_long cmd;
- caddr_t data;
+static errno_t
+gif_ioctl(
+ ifnet_t ifp,
+ u_long cmd,
+ void *data)
{
- struct gif_softc *sc = (struct gif_softc*)ifp;
- struct ifreq *ifr = (struct ifreq*)data;
+ struct gif_softc *sc = ifnet_softc(ifp);
+ struct ifreq *ifr = (struct ifreq *)data;
int error = 0, size;
- struct sockaddr *dst, *src;
- int i;
+ struct sockaddr *dst = NULL, *src = NULL;
+ struct sockaddr *sa;
+ struct ifnet *ifp2;
struct gif_softc *sc2;
-
+
switch (cmd) {
case SIOCSIFADDR:
break;
-
+
case SIOCSIFDSTADDR:
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
- /* Called from if_addmulti() with data == NULL if __FreeBSD__ >= 3 */
-#if !defined(__APPLE__)
- switch (ifr->ifr_addr.sa_family) {
-#ifdef INET
- case AF_INET: /* IP supports Multicast */
- break;
-#endif /* INET */
-#ifdef INET6
- case AF_INET6: /* IP6 supports Multicast */
- break;
-#endif /* INET6 */
- default: /* Other protocols doesn't support Multicast */
- error = EAFNOSUPPORT;
- break;
- }
-#endif /*not FreeBSD3*/
break;
-#ifdef SIOCSIFMTU /* xxx */
-#ifndef __OpenBSD__
+#ifdef SIOCSIFMTU /* xxx */
case SIOCGIFMTU:
break;
+
case SIOCSIFMTU:
- {
-#ifdef __bsdi__
- short mtu;
- mtu = *(short *)ifr->ifr_data;
-#else
- u_long mtu;
- mtu = ifr->ifr_mtu;
+ {
+ u_int32_t mtu;
+ mtu = ifr->ifr_mtu;
+ if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) {
+ return EINVAL;
+ }
+ ifnet_set_mtu(ifp, mtu);
+ }
+ break;
+#endif /* SIOCSIFMTU */
+
+ case SIOCSIFPHYADDR:
+#if INET6
+ case SIOCSIFPHYADDR_IN6_32:
+ case SIOCSIFPHYADDR_IN6_64:
+#endif /* INET6 */
+ switch (cmd) {
+#if INET
+ case SIOCSIFPHYADDR:
+ src = (struct sockaddr *)
+ &(((struct in_aliasreq *)data)->ifra_addr);
+ dst = (struct sockaddr *)
+ &(((struct in_aliasreq *)data)->ifra_dstaddr);
+ break;
+#endif
+#if INET6
+ case SIOCSIFPHYADDR_IN6_32: {
+ struct in6_aliasreq_32 *ifra_32 =
+ (struct in6_aliasreq_32 *)data;
+
+ src = (struct sockaddr *)&ifra_32->ifra_addr;
+ dst = (struct sockaddr *)&ifra_32->ifra_dstaddr;
+ break;
+ }
+
+ case SIOCSIFPHYADDR_IN6_64: {
+ struct in6_aliasreq_64 *ifra_64 =
+ (struct in6_aliasreq_64 *)data;
+
+ src = (struct sockaddr *)&ifra_64->ifra_addr;
+ dst = (struct sockaddr *)&ifra_64->ifra_dstaddr;
+ break;
+ }
#endif
- if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) {
- return (EINVAL);
+ }
+
+ /* sa_family must be equal */
+ if (src->sa_family != dst->sa_family) {
+ return EINVAL;
+ }
+
+ /* validate sa_len */
+ switch (src->sa_family) {
+#if INET
+ case AF_INET:
+ if (src->sa_len != sizeof(struct sockaddr_in)) {
+ return EINVAL;
+ }
+ break;
+#endif
+#if INET6
+ case AF_INET6:
+ if (src->sa_len != sizeof(struct sockaddr_in6)) {
+ return EINVAL;
}
- ifp->if_mtu = mtu;
+ break;
+#endif
+ default:
+ return EAFNOSUPPORT;
}
- break;
+ switch (dst->sa_family) {
+#if INET
+ case AF_INET:
+ if (dst->sa_len != sizeof(struct sockaddr_in)) {
+ return EINVAL;
+ }
+ break;
#endif
-#endif /* SIOCSIFMTU */
+#if INET6
+ case AF_INET6:
+ if (dst->sa_len != sizeof(struct sockaddr_in6)) {
+ return EINVAL;
+ }
+ break;
+#endif
+ default:
+ return EAFNOSUPPORT;
+ }
- case SIOCSIFPHYADDR:
+ /* check sa_family looks sane for the cmd */
+ switch (cmd) {
+ case SIOCSIFPHYADDR:
+ if (src->sa_family == AF_INET) {
+ break;
+ }
+ return EAFNOSUPPORT;
#if INET6
- case SIOCSIFPHYADDR_IN6:
+ case SIOCSIFPHYADDR_IN6_32:
+ case SIOCSIFPHYADDR_IN6_64:
+ if (src->sa_family == AF_INET6) {
+ break;
+ }
+ return EAFNOSUPPORT;
#endif /* INET6 */
- /* can't configure same pair of address onto two gif */
- src = (struct sockaddr *)
- &(((struct in_aliasreq *)data)->ifra_addr);
- dst = (struct sockaddr *)
- &(((struct in_aliasreq *)data)->ifra_dstaddr);
- for (i = 0; i < ngif; i++) {
- sc2 = gif + i;
- if (sc2 == sc)
+ }
+
+#define GIF_ORDERED_LOCK(sc, sc2) \
+ if (sc < sc2) { \
+ GIF_LOCK(sc); \
+ GIF_LOCK(sc2); \
+ } else { \
+ GIF_LOCK(sc2); \
+ GIF_LOCK(sc); \
+ }
+
+#define GIF_ORDERED_UNLOCK(sc, sc2) \
+ if (sc > sc2) { \
+ GIF_UNLOCK(sc); \
+ GIF_UNLOCK(sc2); \
+ } else { \
+ GIF_UNLOCK(sc2); \
+ GIF_UNLOCK(sc); \
+ }
+
+ ifnet_head_lock_shared();
+ TAILQ_FOREACH(ifp2, &ifnet_head, if_link) {
+ if (strcmp(ifnet_name(ifp2), GIFNAME) != 0) {
+ continue;
+ }
+ sc2 = ifnet_softc(ifp2);
+ if (sc2 == sc) {
continue;
- if (!sc2->gif_pdst || !sc2->gif_psrc)
+ }
+ /* lock sc and sc2 in increasing order of ifnet index */
+ GIF_ORDERED_LOCK(sc, sc2);
+ if (!sc2->gif_pdst || !sc2->gif_psrc) {
+ GIF_ORDERED_UNLOCK(sc, sc2);
continue;
- if (sc2->gif_pdst->sa_family == dst->sa_family &&
- sc2->gif_pdst->sa_len == dst->sa_family &&
- bcmp(sc2->gif_pdst, dst, dst->sa_len) == 0 &&
- sc2->gif_psrc->sa_family == src->sa_family &&
- sc2->gif_psrc->sa_len == src->sa_family &&
+ }
+ if (sc2->gif_pdst->sa_family != dst->sa_family ||
+ sc2->gif_pdst->sa_len != dst->sa_len ||
+ sc2->gif_psrc->sa_family != src->sa_family ||
+ sc2->gif_psrc->sa_len != src->sa_len) {
+ GIF_ORDERED_UNLOCK(sc, sc2);
+ continue;
+ }
+#ifndef XBONEHACK
+ /* can't configure same pair of address onto two gifs */
+ if (bcmp(sc2->gif_pdst, dst, dst->sa_len) == 0 &&
bcmp(sc2->gif_psrc, src, src->sa_len) == 0) {
+ GIF_ORDERED_UNLOCK(sc, sc2);
error = EADDRNOTAVAIL;
+ ifnet_head_done();
goto bad;
}
- }
+#endif
- switch (ifr->ifr_addr.sa_family) {
-#if INET
- case AF_INET:
- return in_gif_ioctl(ifp, cmd, data);
-#endif /* INET */
+ /* can't configure multiple multi-dest interfaces */
+#define multidest(x) \
+ (((struct sockaddr_in *)(void *)(x))->sin_addr.s_addr == INADDR_ANY)
#if INET6
- case AF_INET6:
- return in6_gif_ioctl(ifp, cmd, data);
-#endif /* INET6 */
- default:
- error = EPROTOTYPE;
- goto bad;
- break;
+#define multidest6(x) \
+ (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *) \
+ (void *)(x))->sin6_addr))
+#endif
+ if (dst->sa_family == AF_INET &&
+ multidest(dst) && multidest(sc2->gif_pdst)) {
+ GIF_ORDERED_UNLOCK(sc, sc2);
+ error = EADDRNOTAVAIL;
+ ifnet_head_done();
+ goto bad;
+ }
+#if INET6
+ if (dst->sa_family == AF_INET6 &&
+ multidest6(dst) && multidest6(sc2->gif_pdst)) {
+ GIF_ORDERED_UNLOCK(sc, sc2);
+ error = EADDRNOTAVAIL;
+ ifnet_head_done();
+ goto bad;
+ }
+#endif
+ GIF_ORDERED_UNLOCK(sc, sc2);
}
+ ifnet_head_done();
+
+ GIF_LOCK(sc);
+ if (sc->gif_psrc) {
+ FREE(sc->gif_psrc, M_IFADDR);
+ }
+ sa = (struct sockaddr *)_MALLOC(src->sa_len, M_IFADDR,
+ M_WAITOK);
+ if (sa == NULL) {
+ GIF_UNLOCK(sc);
+ return ENOBUFS;
+ }
+ bcopy((caddr_t)src, (caddr_t)sa, src->sa_len);
+ sc->gif_psrc = sa;
+
+ if (sc->gif_pdst) {
+ FREE(sc->gif_pdst, M_IFADDR);
+ }
+ sa = (struct sockaddr *)_MALLOC(dst->sa_len, M_IFADDR,
+ M_WAITOK);
+ if (sa == NULL) {
+ GIF_UNLOCK(sc);
+ return ENOBUFS;
+ }
+ bcopy((caddr_t)dst, (caddr_t)sa, dst->sa_len);
+ sc->gif_pdst = sa;
+ GIF_UNLOCK(sc);
+
+ ifnet_set_flags(ifp, IFF_RUNNING | IFF_UP, IFF_RUNNING |
+ IFF_UP);
+
+ error = 0;
break;
-
+
+#ifdef SIOCDIFPHYADDR
+ case SIOCDIFPHYADDR:
+ GIF_LOCK(sc);
+ if (sc->gif_psrc) {
+ FREE(sc->gif_psrc, M_IFADDR);
+ sc->gif_psrc = NULL;
+ }
+ if (sc->gif_pdst) {
+ FREE(sc->gif_pdst, M_IFADDR);
+ sc->gif_pdst = NULL;
+ }
+ GIF_UNLOCK(sc);
+ /* change the IFF_{UP, RUNNING} flag as well? */
+ break;
+#endif
+
case SIOCGIFPSRCADDR:
#if INET6
case SIOCGIFPSRCADDR_IN6:
#endif /* INET6 */
+ GIF_LOCK(sc);
if (sc->gif_psrc == NULL) {
+ GIF_UNLOCK(sc);
error = EADDRNOTAVAIL;
goto bad;
}
src = sc->gif_psrc;
- switch (sc->gif_psrc->sa_family) {
+ switch (cmd) {
#if INET
- case AF_INET:
+ case SIOCGIFPSRCADDR:
dst = &ifr->ifr_addr;
- size = sizeof(struct sockaddr_in);
+ size = sizeof(ifr->ifr_addr);
break;
#endif /* INET */
#if INET6
- case AF_INET6:
+ case SIOCGIFPSRCADDR_IN6:
dst = (struct sockaddr *)
- &(((struct in6_ifreq *)data)->ifr_addr);
- size = sizeof(struct sockaddr_in6);
+ &(((struct in6_ifreq *)data)->ifr_addr);
+ size = sizeof(((struct in6_ifreq *)data)->ifr_addr);
break;
#endif /* INET6 */
default:
+ GIF_UNLOCK(sc);
error = EADDRNOTAVAIL;
goto bad;
}
- bcopy((caddr_t)src, (caddr_t)dst, size);
+ if (src->sa_len > size) {
+ GIF_UNLOCK(sc);
+ return EINVAL;
+ }
+ bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
+ GIF_UNLOCK(sc);
break;
-
+
case SIOCGIFPDSTADDR:
#if INET6
case SIOCGIFPDSTADDR_IN6:
#endif /* INET6 */
+ GIF_LOCK(sc);
if (sc->gif_pdst == NULL) {
+ GIF_UNLOCK(sc);
error = EADDRNOTAVAIL;
goto bad;
}
src = sc->gif_pdst;
- switch (sc->gif_pdst->sa_family) {
+ switch (cmd) {
#if INET
- case AF_INET:
+ case SIOCGIFPDSTADDR:
dst = &ifr->ifr_addr;
- size = sizeof(struct sockaddr_in);
+ size = sizeof(ifr->ifr_addr);
break;
#endif /* INET */
#if INET6
- case AF_INET6:
+ case SIOCGIFPDSTADDR_IN6:
dst = (struct sockaddr *)
- &(((struct in6_ifreq *)data)->ifr_addr);
- size = sizeof(struct sockaddr_in6);
+ &(((struct in6_ifreq *)data)->ifr_addr);
+ size = sizeof(((struct in6_ifreq *)data)->ifr_addr);
break;
#endif /* INET6 */
default:
error = EADDRNOTAVAIL;
+ GIF_UNLOCK(sc);
goto bad;
}
- bcopy((caddr_t)src, (caddr_t)dst, size);
+ if (src->sa_len > size) {
+ GIF_UNLOCK(sc);
+ return EINVAL;
+ }
+ bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
+ GIF_UNLOCK(sc);
break;
case SIOCSIFFLAGS:
- if (sc->gif_psrc == NULL)
- break;
- switch (sc->gif_psrc->sa_family) {
-#if INET
- case AF_INET:
- return in_gif_ioctl(ifp, cmd, data);
-#endif /* INET */
-#if INET6
- case AF_INET6:
- return in6_gif_ioctl(ifp, cmd, data);
-#endif /* INET6 */
- default:
- error = EPROTOTYPE;
- goto bad;
- break;
- }
+ /* if_ioctl() takes care of it */
break;
default:
- error = EINVAL;
+ error = EOPNOTSUPP;
break;
}
- bad:
+bad:
return error;
}
-#endif /*NGIF > 0*/
+
+static void
+gif_delete_tunnel(struct gif_softc *sc)
+{
+ GIF_LOCK_ASSERT(sc);
+ if (sc->gif_psrc) {
+ FREE(sc->gif_psrc, M_IFADDR);
+ sc->gif_psrc = NULL;
+ }
+ if (sc->gif_pdst) {
+ FREE(sc->gif_pdst, M_IFADDR);
+ sc->gif_pdst = NULL;
+ }
+ ROUTE_RELEASE(&sc->gif_ro);
+ /* change the IFF_UP flag as well? */
+}
projects / apple / xnu.git / blobdiff