/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2020 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
* 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,
* 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_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 $ */
+/* $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.
*/
+/*
+ * 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.
+ */
#include <sys/param.h>
#include <sys/systm.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/route.h>
#include <net/bpf.h>
+#include <net/kpi_protocol.h>
+#include <net/kpi_interface.h>
+#include <net/init.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
-#if INET
+#if INET
#include <netinet/in_var.h>
#include <netinet/in_gif.h>
#include <netinet/ip_var.h>
-#endif /* INET */
+#endif /* INET */
#if INET6
#include <netinet6/in6_var.h>
#include <net/net_osdep.h>
-#define GIFNAME "gif"
-#define GIFDEV "if_gif"
-#define GIF_MAXUNIT 0x7fff /* ifp->if_unit is only 15 bits */
-
-#ifndef __APPLE__
-static MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface");
+#if CONFIG_MACF_NET
+#include <security/mac_framework.h>
#endif
-TAILQ_HEAD(gifhead, gif_softc) gifs = TAILQ_HEAD_INITIALIZER(gifs);
+#define GIFNAME "gif"
+#define GIFDEV "if_gif"
-#ifdef __APPLE__
-void gifattach(void);
-int gif_pre_output(struct ifnet *ifp, u_long protocol_family, struct mbuf **m0,
- const struct sockaddr *dst, caddr_t rt, char *frame, char *address);
-static void gif_create_dev(void);
-static int gif_encapcheck(const struct mbuf*, int, int, void*);
+#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;
-int ngif = 0; /* number of interfaces */
-#endif
+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
-struct protosw in_gif_protosw =
-{ SOCK_RAW, 0, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR,
- in_gif_input, 0, 0, 0,
- 0,
- 0, 0, 0, 0,
- 0,
- &rip_usrreqs,
- 0, rip_unlock, 0
+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
-struct ip6protosw in6_gif_protosw =
-{ SOCK_RAW, 0, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR,
- in6_gif_input, 0, 0, 0,
- 0,
- 0, 0, 0, 0,
- 0,
- &rip6_usrreqs,
- 0, rip_unlock, 0,
-
+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
-#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
-#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 *);
-#ifdef __APPLE__
+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
*/
/* GIF interface module support */
-int gif_demux(
- struct ifnet *ifp,
- struct mbuf *m,
- char *frame_header,
- u_long *protocol_family)
+static int
+gif_demux(
+ ifnet_t ifp,
+ __unused mbuf_t m,
+ __unused char *frame_header,
+ protocol_family_t *protocol_family)
{
- struct gif_softc* gif = (struct gif_softc*)ifp->if_softc;
-
+ struct gif_softc *sc = ifnet_softc(ifp);
+
+ GIF_LOCK(sc);
/* Only one protocol may be attached to a gif interface. */
- *protocol_family = gif->gif_proto;
-
+ *protocol_family = sc->gif_proto;
+ GIF_UNLOCK(sc);
+
return 0;
}
-static
-int gif_add_proto(struct ifnet *ifp, u_long protocol_family, struct ddesc_head_str *desc_head)
+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* gif = (struct gif_softc*)ifp->if_softc;
+ struct gif_softc *sc = ifnet_softc(ifp);
- if (gif->gif_proto != 0)
- printf("gif_add_proto: request add_proto for gif%d\n", gif->gif_if.if_unit);
+ GIF_LOCK(sc);
+ if (sc->gif_proto != 0) {
+ printf("gif_add_proto: request add_proto for gif%d\n",
+ ifnet_unit(ifp));
+ }
- gif->gif_proto = protocol_family;
+ sc->gif_proto = protocol_family;
+ GIF_UNLOCK(sc);
return 0;
}
-static
-int gif_del_proto(struct ifnet *ifp, u_long protocol_family)
+static errno_t
+gif_del_proto(
+ ifnet_t ifp,
+ protocol_family_t protocol_family)
{
- if (((struct gif_softc*)ifp)->gif_proto == protocol_family)
- ((struct gif_softc*)ifp)->gif_proto = 0;
- else
- return ENOENT;
+ 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;
}
/* Glue code to attach inet to a gif interface through DLIL */
-int
+static errno_t
gif_attach_proto_family(
- struct ifnet *ifp,
- u_long protocol_family)
+ ifnet_t ifp,
+ protocol_family_t protocol_family)
{
- struct dlil_proto_reg_str reg;
- int stat;
+ struct ifnet_attach_proto_param reg;
+ errno_t stat;
bzero(®, sizeof(reg));
- TAILQ_INIT(®.demux_desc_head);
- reg.interface_family = ifp->if_family;
- reg.unit_number = ifp->if_unit;
- reg.input = gif_input;
- reg.pre_output = gif_pre_output;
- reg.protocol_family = protocol_family;
-
- stat = dlil_attach_protocol(®);
- if (stat && stat != EEXIST) {
- panic("gif_attach_proto_family can't attach interface fam=%d\n", protocol_family);
- }
-
- return stat;
-}
+ reg.input = gif_input;
-#endif
+ 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 stat;
+}
/* Function to setup the first gif interface */
void
-gifattach(void)
+gif_init(void)
{
- int error;
+ errno_t result;
- /* Init the list of interfaces */
+ /* 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 */
- if ( error = dlil_reg_proto_module(AF_INET, APPLE_IF_FAM_GIF, gif_attach_proto_family, NULL) != 0)
- printf("dlil_reg_proto_module failed for AF_INET error=%d\n", error);
-
- if ( error = dlil_reg_proto_module(AF_INET6, APPLE_IF_FAM_GIF, gif_attach_proto_family, NULL) != 0)
- printf("dlil_reg_proto_module failed for AF_INET6 error=%d\n", error);
-
- /* Create first device */
- gif_create_dev();
+ 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);
+}
+
+static errno_t
+gif_set_bpf_tap(
+ ifnet_t ifp,
+ bpf_tap_mode mode,
+ bpf_packet_func callback)
+{
+ struct gif_softc *sc = ifnet_softc(ifp);
+
+ GIF_LOCK(sc);
+ sc->tap_mode = mode;
+ sc->tap_callback = callback;
+ GIF_UNLOCK(sc);
+
+ return 0;
}
-/* Creates another gif device if there are none free */
static void
-gif_create_dev(void)
+gif_detach(struct ifnet *ifp)
{
- struct gif_softc *sc;
-
-
+ 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);
+}
+
+static int
+gif_clone_create(struct if_clone *ifc, uint32_t unit, __unused void *params)
+{
+ 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)
- return;
-
- /* Check for unused gif interface */
- TAILQ_FOREACH(sc, &gifs, gif_link) {
- /* If unused, return, no need to create a new interface */
- if ((sc->gif_if.if_flags & IFF_RUNNING) == 0)
- return;
+ if (ngif >= GIF_MAXUNIT) {
+ error = ENXIO;
+ goto done;
}
- sc = _MALLOC(sizeof(struct gif_softc), M_DEVBUF, M_WAITOK);
+ sc = if_clone_softc_allocate(&gif_cloner);
if (sc == NULL) {
- log(LOG_ERR, "gifattach: failed to allocate gif%d\n", ngif);
- return;
+ 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;
}
- bzero(sc, sizeof(struct gif_softc));
- sc->gif_if.if_softc = sc;
- sc->gif_if.if_name = GIFNAME;
- sc->gif_if.if_unit = ngif;
-
sc->encap_cookie4 = sc->encap_cookie6 = NULL;
-#ifdef INET
+#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));
- FREE(sc, M_DEVBUF);
- return;
+ 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
-#ifdef INET6
+#if INET6
sc->encap_cookie6 = encap_attach_func(AF_INET6, -1,
- gif_encapcheck, (struct protosw*)&in6_gif_protosw, sc);
+ 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));
- FREE(sc, M_DEVBUF);
- return;
+ 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;
- 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;
+ ifnet_set_mtu(sc->gif_if, GIF_MTU);
+ ifnet_set_flags(sc->gif_if, IFF_POINTOPOINT | IFF_MULTICAST, 0xffff);
#if 0
/* turn off ingress filter */
sc->gif_if.if_flags |= IFF_LINK2;
#endif
- sc->gif_if.if_demux = gif_demux;
- sc->gif_if.if_ioctl = gif_ioctl;
- sc->gif_if.if_output = NULL; /* pre_output returns error or EJUSTRETURN */
- sc->gif_if.if_type = IFT_GIF;
- sc->gif_if.if_add_proto = gif_add_proto;
- sc->gif_if.if_del_proto = gif_del_proto;
- dlil_if_attach(&sc->gif_if);
- bpfattach(&sc->gif_if, DLT_NULL, sizeof(u_int));
+ 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;
}
static int
-gif_encapcheck(m, off, proto, arg)
- const struct mbuf *m;
- int off;
- int proto;
- void *arg;
+gif_remove(struct ifnet *ifp)
{
+ 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;
+}
+
+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;
+ }
+
+ 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)
+{
+ int error = 0;
struct ip ip;
struct gif_softc *sc;
sc = (struct gif_softc *)arg;
- if (sc == NULL)
- return 0;
+ if (sc == NULL) {
+ return error;
+ }
- if ((sc->gif_if.if_flags & IFF_UP) == 0)
- return 0;
+ GIF_LOCK(sc);
+ if ((ifnet_flags(sc->gif_if) & IFF_UP) == 0) {
+ goto done;
+ }
/* no physical address */
- if (!sc->gif_psrc || !sc->gif_pdst)
- return 0;
+ if (!sc->gif_psrc || !sc->gif_pdst) {
+ goto done;
+ }
switch (proto) {
#if INET
break;
#endif
default:
- return 0;
+ goto done;
}
- /* 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);
switch (ip.ip_v) {
#if INET
case 4:
if (sc->gif_psrc->sa_family != AF_INET ||
- sc->gif_pdst->sa_family != AF_INET)
- return 0;
- return gif_encapcheck4(m, off, proto, arg);
+ sc->gif_pdst->sa_family != AF_INET) {
+ goto done;
+ }
+ error = gif_encapcheck4(m, off, proto, arg);
#endif
#if INET6
case 6:
if (sc->gif_psrc->sa_family != AF_INET6 ||
- sc->gif_pdst->sa_family != AF_INET6)
- return 0;
- return gif_encapcheck6(m, off, proto, arg);
+ sc->gif_pdst->sa_family != AF_INET6) {
+ goto done;
+ }
+ error = gif_encapcheck6(m, off, proto, arg);
#endif
default:
- return 0;
+ goto done;
}
+done:
+ GIF_UNLOCK(sc);
+ return error;
}
-int
-gif_pre_output(
- struct ifnet *ifp,
- u_long protocol_family,
- struct mbuf **m0,
- const struct sockaddr *dst,
- caddr_t rt,
- char *frame,
- char *address)
+static errno_t
+gif_output(
+ ifnet_t ifp,
+ mbuf_t m)
{
- struct gif_softc *sc = (struct gif_softc*)ifp;
- register struct mbuf * m = *m0;
+ 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);
+
/*
- * 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.
+ * 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.
*/
- if (++sc->gif_called > max_gif_nesting) {
- log(LOG_NOTICE,
- "gif_output: recursively called too many times(%d)\n",
- sc->gif_called);
- m_freem(m); /* free it here not in dlil_output*/
- error = EIO; /* is there better errno? */
- goto end;
- }
-
- ifnet_touch_lastchange(ifp);
- m->m_flags &= ~(M_BCAST|M_MCAST);
- if (!(ifp->if_flags & IFF_UP) ||
- sc->gif_psrc == NULL || sc->gif_pdst == NULL) {
- m_freem(m); /* free it here not in dlil_output */
+ 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;
}
- 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_int32_t protocol_family = dst->sa_family;
+ bpf_tap_out(ifp, 0, m, &sc->gif_proto, sizeof(sc->gif_proto));
- m0.m_next = m;
- m0.m_len = 4;
- m0.m_data = (char *)&protocol_family;
-
- bpf_mtap(ifp, &m0);
- }
- ifp->if_opackets++;
- ifp->if_obytes += m->m_pkthdr.len;
+ 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, (struct rtentry*)rt);
+ 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, (struct rtentry*)rt);
+ error = in6_gif_output(ifp, sc->gif_proto, m, NULL);
break;
#endif
default:
error = ENETDOWN;
- goto end;
+ break;
}
- end:
- sc->gif_called = 0; /* reset recursion counter */
+ GIF_UNLOCK(sc);
+end:
if (error) {
/* the mbuf was freed either by in_gif_output or in here */
- *m0 = NULL; /* avoid getting dlil_output freeing it */
- ifp->if_oerrors++;
+ ifnet_stat_increment_out(ifp, 0, 0, 1);
+ } else {
+ ifnet_stat_increment_out(ifp, 1, bytes_out, 0);
}
- if (error == 0)
+ if (error == 0) {
error = EJUSTRETURN; /* if no error, packet got sent already */
+ }
return error;
}
-int
+/*
+ * gif_input is the input handler for IP and IPv6 attached to gif
+ */
+static errno_t
gif_input(
- struct mbuf *m,
- char* frame_header,
- struct ifnet* gifp,
- u_long protocol_family,
- int sync_ok)
+ ifnet_t ifp,
+ protocol_family_t protocol_family,
+ mbuf_t m,
+ __unused char *frame_header)
{
+ 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 (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_int32_t protocol_family1 = protocol_family;
-
- m0.m_next = m;
- m0.m_len = 4;
- m0.m_data = (char *)&protocol_family1;
-
- bpf_mtap(gifp, &m0);
- }
+ 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.
*/
- proto_input(protocol_family, m);
- gifp->if_ipackets++;
- gifp->if_ibytes += m->m_pkthdr.len;
+ 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);
+ } else {
+ ifnet_stat_increment_in(ifp, 1, pktlen, 0);
+ }
- return (0);
+ 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;
- void* 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;
+ struct sockaddr *dst = NULL, *src = NULL;
struct sockaddr *sa;
- int s;
struct ifnet *ifp2;
struct gif_softc *sc2;
-
+
switch (cmd) {
case SIOCSIFADDR:
break;
-
+
case SIOCSIFDSTADDR:
break;
case SIOCDELMULTI:
break;
-#ifdef SIOCSIFMTU /* xxx */
+#ifdef SIOCSIFMTU /* xxx */
case SIOCGIFMTU:
break;
case SIOCSIFMTU:
- {
- u_long mtu;
- mtu = ifr->ifr_mtu;
- if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) {
- return (EINVAL);
- }
- ifp->if_mtu = mtu;
+ {
+ u_int32_t mtu;
+ mtu = ifr->ifr_mtu;
+ if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) {
+ return EINVAL;
}
- break;
+ ifnet_set_mtu(ifp, mtu);
+ }
+ break;
#endif /* SIOCSIFMTU */
case SIOCSIFPHYADDR:
#if INET6
- case SIOCSIFPHYADDR_IN6:
+ case SIOCSIFPHYADDR_IN6_32:
+ case SIOCSIFPHYADDR_IN6_64:
#endif /* INET6 */
- case SIOCSLIFPHYADDR:
switch (cmd) {
#if INET
case SIOCSIFPHYADDR:
src = (struct sockaddr *)
- &(((struct in_aliasreq *)data)->ifra_addr);
+ &(((struct in_aliasreq *)data)->ifra_addr);
dst = (struct sockaddr *)
- &(((struct in_aliasreq *)data)->ifra_dstaddr);
+ &(((struct in_aliasreq *)data)->ifra_dstaddr);
break;
#endif
#if INET6
- case SIOCSIFPHYADDR_IN6:
- src = (struct sockaddr *)
- &(((struct in6_aliasreq *)data)->ifra_addr);
- dst = (struct sockaddr *)
- &(((struct in6_aliasreq *)data)->ifra_dstaddr);
+ 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
- case SIOCSLIFPHYADDR:
- src = (struct sockaddr *)
- &(((struct if_laddrreq *)data)->addr);
- dst = (struct sockaddr *)
- &(((struct if_laddrreq *)data)->dstaddr);
}
/* sa_family must be equal */
- if (src->sa_family != dst->sa_family)
+ 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))
+ 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))
+ if (src->sa_len != sizeof(struct sockaddr_in6)) {
return EINVAL;
+ }
break;
#endif
default:
switch (dst->sa_family) {
#if INET
case AF_INET:
- if (dst->sa_len != sizeof(struct sockaddr_in))
+ if (dst->sa_len != sizeof(struct sockaddr_in)) {
return EINVAL;
+ }
break;
#endif
#if INET6
case AF_INET6:
- if (dst->sa_len != sizeof(struct sockaddr_in6))
+ if (dst->sa_len != sizeof(struct sockaddr_in6)) {
return EINVAL;
+ }
break;
#endif
default:
/* check sa_family looks sane for the cmd */
switch (cmd) {
case SIOCSIFPHYADDR:
- if (src->sa_family == AF_INET)
+ if (src->sa_family == AF_INET) {
break;
+ }
return EAFNOSUPPORT;
#if INET6
- case SIOCSIFPHYADDR_IN6:
- if (src->sa_family == AF_INET6)
+ case SIOCSIFPHYADDR_IN6_32:
+ case SIOCSIFPHYADDR_IN6_64:
+ if (src->sa_family == AF_INET6) {
break;
+ }
return EAFNOSUPPORT;
#endif /* INET6 */
- case SIOCSLIFPHYADDR:
- /* checks done in the above */
- break;
}
+#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(ifp2->if_name, GIFNAME) != 0)
+ if (strcmp(ifnet_name(ifp2), GIFNAME) != 0) {
continue;
- sc2 = ifp2->if_softc;
- if (sc2 == sc)
+ }
+ 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_len ||
sc2->gif_psrc->sa_family != src->sa_family ||
- sc2->gif_psrc->sa_len != src->sa_len)
+ 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;
/* can't configure multiple multi-dest interfaces */
#define multidest(x) \
- (((struct sockaddr_in *)(x))->sin_addr.s_addr == INADDR_ANY)
+ (((struct sockaddr_in *)(void *)(x))->sin_addr.s_addr == INADDR_ANY)
#if INET6
#define multidest6(x) \
- (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(x))->sin6_addr))
+ (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();
- if (sc->gif_psrc)
- FREE((caddr_t)sc->gif_psrc, M_IFADDR);
- sa = (struct sockaddr *)_MALLOC(src->sa_len, M_IFADDR, M_WAITOK);
+ 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((caddr_t)sc->gif_pdst, M_IFADDR);
- sa = (struct sockaddr *)_MALLOC(dst->sa_len, M_IFADDR, M_WAITOK);
+ 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);
- ifp->if_flags |= IFF_RUNNING;
-
- s = splimp();
- if_up(ifp); /* mark interface UP and send up RTM_IFINFO */
-#ifdef __APPLE__
- /* Make sure at least one unused device is still available */
- gif_create_dev();
-#endif
- splx(s);
+ 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((caddr_t)sc->gif_psrc, M_IFADDR);
+ FREE(sc->gif_psrc, M_IFADDR);
sc->gif_psrc = NULL;
}
if (sc->gif_pdst) {
- FREE((caddr_t)sc->gif_pdst, M_IFADDR);
+ 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;
}
#if INET6
case SIOCGIFPSRCADDR_IN6:
dst = (struct sockaddr *)
- &(((struct in6_ifreq *)data)->ifr_addr);
+ &(((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;
}
- if (src->sa_len > 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;
}
#if INET6
case SIOCGIFPDSTADDR_IN6:
dst = (struct sockaddr *)
- &(((struct in6_ifreq *)data)->ifr_addr);
+ &(((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;
}
- if (src->sa_len > size)
+ if (src->sa_len > size) {
+ GIF_UNLOCK(sc);
return EINVAL;
- bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
- break;
-
- case SIOCGLIFPHYADDR:
- if (sc->gif_psrc == NULL || sc->gif_pdst == NULL) {
- error = EADDRNOTAVAIL;
- goto bad;
}
-
- /* copy src */
- src = sc->gif_psrc;
- dst = (struct sockaddr *)
- &(((struct if_laddrreq *)data)->addr);
- size = sizeof(((struct if_laddrreq *)data)->addr);
- if (src->sa_len > size)
- return EINVAL;
- bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
-
- /* copy dst */
- src = sc->gif_pdst;
- dst = (struct sockaddr *)
- &(((struct if_laddrreq *)data)->dstaddr);
- size = sizeof(((struct if_laddrreq *)data)->dstaddr);
- if (src->sa_len > size)
- return EINVAL;
bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
+ GIF_UNLOCK(sc);
break;
case SIOCSIFFLAGS:
error = EOPNOTSUPP;
break;
}
- bad:
+bad:
return error;
}
-#ifndef __APPLE__
-/* This function is not used in our stack */
-void
-gif_delete_tunnel(sc)
- struct gif_softc *sc;
+static void
+gif_delete_tunnel(struct gif_softc *sc)
{
- /* XXX: NetBSD protects this function with splsoftnet() */
-
+ GIF_LOCK_ASSERT(sc);
if (sc->gif_psrc) {
- FREE((caddr_t)sc->gif_psrc, M_IFADDR);
+ FREE(sc->gif_psrc, M_IFADDR);
sc->gif_psrc = NULL;
}
if (sc->gif_pdst) {
- FREE((caddr_t)sc->gif_pdst, M_IFADDR);
+ FREE(sc->gif_pdst, M_IFADDR);
sc->gif_pdst = NULL;
}
+ ROUTE_RELEASE(&sc->gif_ro);
/* change the IFF_UP flag as well? */
}
-#endif
projects / apple / xnu.git / blobdiff