/*
- * Copyright (c) 2000-2008 Apple 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.
#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/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 <security/mac_framework.h>
#endif
-#define GIFNAME "gif"
-#define GIFDEV "if_gif"
-#define GIF_MAXUNIT 0x7fff /* ifp->if_unit is only 15 bits */
+#define GIFNAME "gif"
+#define GIFDEV "if_gif"
-#ifndef __APPLE__
-static MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface");
-#endif
+#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);
-#ifdef __APPLE__
-void gifattach(void);
-static int gif_encapcheck(const struct mbuf*, int, int, void*);
+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);
+ mbuf_t m, char *frame_header);
static errno_t gif_ioctl(ifnet_t ifp, u_long cmd, void *data);
-int ngif = 0; /* number of interfaces */
-#endif
+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, {0, 0}, 0, {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, {0, 0}, 0, {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
-static if_clone_t gif_cloner = NULL;
+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 */
-static int gif_demux(
- ifnet_t ifp,
- __unused mbuf_t m,
- __unused char *frame_header,
- protocol_family_t *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 *sc = ifnet_softc(ifp);
+
+ GIF_LOCK(sc);
/* Only one protocol may be attached to a gif interface. */
- *protocol_family = ((struct gif_softc*)ifnet_softc(ifp))->gif_proto;
-
+ *protocol_family = sc->gif_proto;
+ GIF_UNLOCK(sc);
+
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)
+ 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 = ifnet_softc(ifp);
+ struct gif_softc *sc = ifnet_softc(ifp);
- if (gif->gif_proto != 0)
- printf("gif_add_proto: request add_proto for gif%d\n", ifnet_unit(ifp));
+ 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 errno_t
gif_del_proto(
- ifnet_t ifp,
- protocol_family_t protocol_family)
+ ifnet_t ifp,
+ protocol_family_t protocol_family)
{
- if (((struct gif_softc*)ifnet_softc(ifp))->gif_proto == protocol_family)
- ((struct gif_softc*)ifnet_softc(ifp))->gif_proto = 0;
-
+ 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 */
static errno_t
gif_attach_proto_family(
- ifnet_t ifp,
- protocol_family_t protocol_family)
+ ifnet_t ifp,
+ protocol_family_t protocol_family)
{
- struct ifnet_attach_proto_param reg;
- errno_t stat;
+ struct ifnet_attach_proto_param reg;
+ errno_t stat;
bzero(®, sizeof(reg));
- reg.input = gif_input;
+ reg.input = gif_input;
- 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);
- }
+ 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;
+ return stat;
}
-#endif
-
/* Function to setup the first gif interface */
-__private_extern__ void
-gifattach(void)
+void
+gif_init(void)
{
errno_t result;
- struct ifnet_clone_params ifnet_clone_params;
- struct if_clone *ifc = NULL;
- /* 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 */
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);
+ gif_attach_proto_family, NULL);
+ if (result != 0) {
+ printf("proto_register_plumber failed for AF_INET error=%d\n",
+ result);
+ }
- ifnet_clone_params.ifc_name = "gif";
- ifnet_clone_params.ifc_create = gif_clone_create;
- ifnet_clone_params.ifc_destroy = gif_clone_destroy;
+ 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 = ifnet_clone_attach(&ifnet_clone_params, &gif_cloner);
- if (result != 0)
- printf("gifattach: ifnet_clone_attach failed %d\n", result);
+ result = if_clone_attach(&gif_cloner);
+ if (result != 0) {
+ panic("%s: if_clone_attach() failed, error %d\n", __func__, result);
+ }
- /* Create first device */
- ifc = if_clone_lookup("gif", NULL);
- gif_clone_create(ifc, 0, NULL);
+ 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)
+ ifnet_t ifp,
+ bpf_tap_mode mode,
+ bpf_packet_func callback)
{
- struct gif_softc *sc = ifnet_softc(ifp);
-
+ struct gif_softc *sc = ifnet_softc(ifp);
+
+ GIF_LOCK(sc);
sc->tap_mode = mode;
sc->tap_callback = callback;
-
+ GIF_UNLOCK(sc);
+
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);
+}
static int
gif_clone_create(struct if_clone *ifc, uint32_t unit, __unused void *params)
{
- struct gif_softc *sc = NULL;
- struct ifnet_init_params gif_init;
- errno_t result = 0;
+ 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 (ENXIO);
+ 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, "gif_clone_create: failed to allocate gif%d\n", unit);
- return ENOBUFS;
+ log(LOG_ERR, "gif_clone_create: failed to allocate gif%d\n",
+ unit);
+ error = ENOBUFS;
+ goto done;
}
- bzero(sc, sizeof(struct gif_softc));
/* 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);
-
- bzero(&gif_init, sizeof(gif_init));
- gif_init.uniqueid = sc->gif_ifname;
- gif_init.uniqueid_len = strlen(sc->gif_ifname);
- gif_init.name = GIFNAME;
- gif_init.unit = unit;
- gif_init.type = IFT_GIF;
- gif_init.family = IFNET_FAMILY_GIF;
- gif_init.output = gif_output;
- gif_init.demux = gif_demux;
- gif_init.add_proto = gif_add_proto;
- gif_init.del_proto = gif_del_proto;
- gif_init.softc = sc;
- gif_init.ioctl = gif_ioctl;
- gif_init.set_bpf_tap = gif_set_bpf_tap;
-
- result = ifnet_allocate(&gif_init, &sc->gif_if);
- if (result != 0) {
- printf("gif_clone_create, ifnet_allocate failed - %d\n", result);
- _FREE(sc, M_DEVBUF);
- return ENOBUFS;
+ 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);
+ 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);
- FREE(sc, M_DEVBUF);
- return ENOBUFS;
+ 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);
+ gif_encapcheck, (struct protosw *)&in6_gif_protosw, sc);
if (sc->encap_cookie6 == NULL) {
if (sc->encap_cookie4) {
encap_detach(sc->encap_cookie4);
}
printf("%s: unable to attach encap6\n", if_name(sc->gif_if));
ifnet_release(sc->gif_if);
- FREE(sc, M_DEVBUF);
- return ENOBUFS;
+ if_clone_softc_deallocate(&gif_cloner, sc);
+ error = ENOBUFS;
+ goto done;
}
#endif
sc->gif_called = 0;
/* turn off ingress filter */
sc->gif_if.if_flags |= IFF_LINK2;
#endif
- result = ifnet_attach(sc->gif_if, NULL);
- if (result != 0) {
- printf("gif_clone_create - ifnet_attach failed - %d\n", result);
+ 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);
encap_detach(sc->encap_cookie6);
sc->encap_cookie6 = NULL;
}
- FREE(sc, M_DEVBUF);
- return result;
+ 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++;
- return 0;
+done:
+ lck_mtx_unlock(gif_mtx);
+
+ return error;
}
static int
-gif_clone_destroy(struct ifnet *ifp)
+gif_remove(struct ifnet *ifp)
{
-#if defined(INET) || defined(INET6)
- int err = 0;
-#endif
- struct gif_softc *sc = ifp->if_softc;
+ 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
- if (sc->encap_cookie6 != NULL) {
- err = encap_detach(sc->encap_cookie6);
- KASSERT(err == 0, ("gif_clone_destroy: Unexpected error detaching encap_cookie6"));
- }
+ encap_cookie6 = sc->encap_cookie6;
#endif
#ifdef INET
- if (sc->encap_cookie4 != NULL) {
- err = encap_detach(sc->encap_cookie4);
- KASSERT(err == 0, ("gif_clone_destroy: Unexpected error detaching encap_cookie4"));
- }
+ encap_cookie4 = sc->encap_cookie4;
#endif
- err = ifnet_set_flags(ifp, 0, IFF_UP);
- if (err != 0) {
- printf("gif_clone_destroy: ifnet_set_flags failed %d\n", err);
+done:
+ if (sc != NULL) {
+ GIF_UNLOCK(sc);
}
+ lck_mtx_unlock(gif_mtx);
- err = ifnet_detach(ifp);
- if (err != 0)
- panic("gif_clone_destroy: ifnet_detach(%p) failed %d\n", ifp, err);
- FREE(sc, M_DEVBUF);
- ngif--;
+ 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;
}
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 ((ifnet_flags(sc->gif_if) & 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;
}
mbuf_copydata((struct mbuf *)(size_t)m, 0, sizeof(ip), &ip);
#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;
}
static errno_t
gif_output(
- ifnet_t ifp,
- mbuf_t m)
+ 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.
+ * 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);
+ m->m_flags &= ~(M_BCAST | M_MCAST);
if (!(ifnet_flags(ifp) & IFF_UP) ||
- sc->gif_psrc == NULL || sc->gif_pdst == NULL) {
+ gif_psrc == NULL || gif_pdst == NULL) {
ifnet_touch_lastchange(ifp);
- m_freem(m); /* free it here not in dlil_output */
+ 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
#endif
default:
error = ENETDOWN;
- goto end;
+ break;
}
- end:
+ 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);
}
- else {
- ifnet_stat_increment_out(ifp, 1, m->m_pkthdr.len, 0);
- }
- if (error == 0)
+ if (error == 0) {
error = EJUSTRETURN; /* if no error, packet got sent already */
+ }
return error;
}
*/
static errno_t
gif_input(
- ifnet_t ifp,
- protocol_family_t protocol_family,
- mbuf_t m,
- __unused char *frame_header)
+ ifnet_t ifp,
+ protocol_family_t protocol_family,
+ mbuf_t m,
+ __unused char *frame_header)
{
struct gif_softc *sc = ifnet_softc(ifp);
-
+
bpf_tap_in(ifp, 0, m, &sc->gif_proto, sizeof(sc->gif_proto));
/*
* it occurs more times than we thought, we may change the policy
* again.
*/
+ 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, m->m_pkthdr.len, 0);
+ } else {
+ ifnet_stat_increment_in(ifp, 1, pktlen, 0);
+ }
- return (0);
+ return 0;
}
/* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */
static errno_t
gif_ioctl(
- ifnet_t ifp,
- u_long cmd,
- void *data)
+ ifnet_t ifp,
+ u_long cmd,
+ void *data)
{
struct gif_softc *sc = ifnet_softc(ifp);
- struct ifreq *ifr = (struct ifreq*)data;
+ struct ifreq *ifr = (struct ifreq *)data;
int error = 0, size;
struct sockaddr *dst = NULL, *src = NULL;
struct sockaddr *sa;
case SIOCDELMULTI:
break;
-#ifdef SIOCSIFMTU /* xxx */
+#ifdef SIOCSIFMTU /* xxx */
case SIOCGIFMTU:
break;
case SIOCSIFMTU:
- {
- u_int32_t mtu;
- mtu = ifr->ifr_mtu;
- if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) {
- return (EINVAL);
- }
- ifnet_set_mtu(ifp, 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:
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
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_32:
case SIOCSIFPHYADDR_IN6_64:
- if (src->sa_family == AF_INET6)
+ 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(ifnet_name(ifp2), GIFNAME) != 0)
+ if (strcmp(ifnet_name(ifp2), GIFNAME) != 0) {
continue;
+ }
sc2 = ifnet_softc(ifp2);
- if (sc2 == sc)
+ 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;
(((struct sockaddr_in *)(void *)(x))->sin_addr.s_addr == INADDR_ANY)
#if INET6
#define multidest6(x) \
- (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)(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);
- if (sa == NULL)
+ 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 (sa == NULL)
- return ENOBUFS;
+ 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);
- 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;
}
-/* 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? */
}
projects / apple / xnu.git / blobdiff