/* * Copyright (c) 2000-2021 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* $FreeBSD: src/sys/net/if_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. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if INET #include #include #include #endif /* INET */ #include #include #include #include #include #include #include #include #include #include #define GIFNAME "gif" #define GIFDEV "if_gif" #define GIF_MAXUNIT IF_MAXUNIT #define GIF_ZONE_MAX_ELEM MIN(IFNETS_MAX, GIF_MAXUNIT) /* gif lock variables */ static LCK_GRP_DECLARE(gif_mtx_grp, "gif"); static LCK_ATTR_DECLARE(gif_mtx_attr, 0, 0); static LCK_MTX_DECLARE_ATTR(gif_mtx, &gif_mtx_grp, &gif_mtx_attr); 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 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, }; 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); /* * 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. */ /* GIF interface module support */ 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 = 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) { /* 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; } 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; } /* 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; 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 gif_init(void) { errno_t result; /* Initialize the list of interfaces */ TAILQ_INIT(&gifs); /* 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", __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; } static void gif_detach(struct ifnet *ifp) { struct gif_softc *sc = ifp->if_softc; lck_mtx_destroy(&sc->gif_lock, &gif_mtx_grp); kfree_type(struct gif_softc, 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) { error = ENXIO; goto done; } sc = kalloc_type(struct gif_softc, Z_WAITOK_ZERO_NOFAIL); /* 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); kfree_type(struct gif_softc, 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); kfree_type(struct gif_softc, sc); error = ENOBUFS; goto done; } #endif 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); kfree_type(struct gif_softc, sc); error = ENOBUFS; goto done; } sc->gif_called = 0; ifnet_set_mtu(sc->gif_if, GIF_MTU); ifnet_set_flags(sc->gif_if, IFF_POINTOPOINT | IFF_MULTICAST, 0xffff); 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; } kfree_type(struct gif_softc, sc); goto done; } 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_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); encap_cookie6 = sc->encap_cookie6; #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", 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 error; } 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; } switch (proto) { #if INET case IPPROTO_IPV4: break; #endif case IPPROTO_IPV6: break; 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 OS_FALLTHROUGH; 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); OS_FALLTHROUGH; 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, sc->gif_proto, m, NULL); break; #endif case AF_INET6: error = in6_gif_output(ifp, sc->gif_proto, m, NULL); break; default: error = ENETDOWN; break; } 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; } /* * 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) { struct gif_softc *sc = ifnet_softc(ifp); 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 * specified address family. * Note: older versions of gif_input directly called network layer * input functions, e.g. ip6_input, here. We changed the policy to * prevent too many recursive calls of such input functions, which * might cause kernel panic. But the change may introduce another * problem; if the input queue is full, packets are discarded. * We believed it rarely occurs and changed the policy. If we find * 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, pktlen, 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) { struct gif_softc *sc = ifnet_softc(ifp); struct ifreq *ifr = (struct ifreq *)data; int error = 0, size; 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: break; #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); } break; #endif /* SIOCSIFMTU */ case SIOCSIFPHYADDR: case SIOCSIFPHYADDR_IN6_32: case SIOCSIFPHYADDR_IN6_64: switch (cmd) { #if INET case SIOCSIFPHYADDR: { struct in_aliasreq *ifra = (struct in_aliasreq*)data; src = SA(&ifra->ifra_addr); dst = SA(&ifra->ifra_dstaddr); break; } #endif case SIOCSIFPHYADDR_IN6_32: { struct in6_aliasreq_32 *ifra_32 = (struct in6_aliasreq_32 *)data; src = SA(&ifra_32->ifra_addr); dst = SA(&ifra_32->ifra_dstaddr); break; } case SIOCSIFPHYADDR_IN6_64: { struct in6_aliasreq_64 *ifra_64 = (struct in6_aliasreq_64 *)data; src = SA(&ifra_64->ifra_addr); dst = SA(&ifra_64->ifra_dstaddr); break; } } /* 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 case AF_INET6: if (src->sa_len != sizeof(struct sockaddr_in6)) { return EINVAL; } break; default: return EAFNOSUPPORT; } switch (dst->sa_family) { #if INET case AF_INET: if (dst->sa_len != sizeof(struct sockaddr_in)) { return EINVAL; } break; #endif case AF_INET6: if (dst->sa_len != sizeof(struct sockaddr_in6)) { return EINVAL; } break; default: return EAFNOSUPPORT; } /* check sa_family looks sane for the cmd */ switch (cmd) { case SIOCSIFPHYADDR: if (src->sa_family == AF_INET) { break; } return EAFNOSUPPORT; case SIOCSIFPHYADDR_IN6_32: case SIOCSIFPHYADDR_IN6_64: if (src->sa_family == AF_INET6) { break; } return EAFNOSUPPORT; } #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; } /* 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) { GIF_ORDERED_UNLOCK(sc, sc2); continue; } #ifndef XBONEHACK /* can't configure same pair of address onto two gifs */ if (SOCKADDR_CMP(sc2->gif_pdst, dst, dst->sa_len) == 0 && SOCKADDR_CMP(sc2->gif_psrc, src, src->sa_len) == 0) { GIF_ORDERED_UNLOCK(sc, sc2); error = EADDRNOTAVAIL; ifnet_head_done(); goto bad; } #endif /* can't configure multiple multi-dest interfaces */ #define multidest(x) \ (((struct sockaddr_in *)(void *)(x))->sin_addr.s_addr == INADDR_ANY) #define multidest6(x) \ (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *) \ (void *)(x))->sin6_addr)) 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 (dst->sa_family == AF_INET6 && multidest6(dst) && multidest6(sc2->gif_pdst)) { GIF_ORDERED_UNLOCK(sc, sc2); error = EADDRNOTAVAIL; ifnet_head_done(); goto bad; } GIF_ORDERED_UNLOCK(sc, sc2); } ifnet_head_done(); GIF_LOCK(sc); if (sc->gif_psrc) { kfree_data(sc->gif_psrc, sc->gif_psrc->sa_len); } sa = SA(kalloc_data(src->sa_len, Z_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) { kfree_data(sc->gif_pdst, sc->gif_pdst->sa_len); } sa = SA(kalloc_data(dst->sa_len, Z_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) { kfree_data(sc->gif_psrc, sc->gif_psrc->sa_len); sc->gif_psrc = NULL; } if (sc->gif_pdst) { kfree_data(sc->gif_pdst, sc->gif_pdst->sa_len); sc->gif_pdst = NULL; } GIF_UNLOCK(sc); /* change the IFF_{UP, RUNNING} flag as well? */ break; #endif case SIOCGIFPSRCADDR: case SIOCGIFPSRCADDR_IN6: GIF_LOCK(sc); if (sc->gif_psrc == NULL) { GIF_UNLOCK(sc); error = EADDRNOTAVAIL; goto bad; } src = sc->gif_psrc; switch (cmd) { #if INET case SIOCGIFPSRCADDR: dst = &ifr->ifr_addr; size = sizeof(ifr->ifr_addr); break; #endif /* INET */ case SIOCGIFPSRCADDR_IN6: { struct in6_ifreq *ifreq = (struct in6_ifreq*)data; dst = SA(&ifreq->ifr_addr); size = sizeof(ifreq->ifr_addr); break; } default: GIF_UNLOCK(sc); error = EADDRNOTAVAIL; goto bad; } 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: case SIOCGIFPDSTADDR_IN6: GIF_LOCK(sc); if (sc->gif_pdst == NULL) { GIF_UNLOCK(sc); error = EADDRNOTAVAIL; goto bad; } src = sc->gif_pdst; switch (cmd) { #if INET case SIOCGIFPDSTADDR: dst = &ifr->ifr_addr; size = sizeof(ifr->ifr_addr); break; #endif /* INET */ case SIOCGIFPDSTADDR_IN6: { struct in6_ifreq *ifreq = (struct in6_ifreq*)data; dst = SA(&ifreq->ifr_addr); size = sizeof(ifreq->ifr_addr); break; } default: error = EADDRNOTAVAIL; GIF_UNLOCK(sc); goto bad; } 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_ioctl() takes care of it */ break; default: error = EOPNOTSUPP; break; } bad: return error; } static void gif_delete_tunnel(struct gif_softc *sc) { GIF_LOCK_ASSERT(sc); if (sc->gif_psrc) { kfree_data(sc->gif_psrc, sc->gif_psrc->sa_len); sc->gif_psrc = NULL; } if (sc->gif_pdst) { kfree_data(sc->gif_pdst, sc->gif_pdst->sa_len); sc->gif_pdst = NULL; } ROUTE_RELEASE(&sc->gif_ro); /* change the IFF_UP flag as well? */ }