/* * Copyright (c) 2000 Apple Computer, 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 * 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@ */ /* $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. */ #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 */ #if INET6 #include #include #include #include #include #endif /* INET6 */ #include #include #include #include #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"); #endif TAILQ_HEAD(gifhead, gif_softc) gifs = TAILQ_HEAD_INITIALIZER(gifs); #ifdef __APPLE__ void gifattach __P((void)); int gif_pre_output __P((struct ifnet *, register struct mbuf **, struct sockaddr *, caddr_t, char *, char *, u_long)); static void gif_create_dev(void); static int gif_encapcheck(const struct mbuf*, int, int, void*); int ngif = 0; /* number of interfaces */ #endif #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 }; #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 }; #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; #ifdef __APPLE__ /* * 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 */ int gif_demux(ifp, m, frame_header, proto) struct ifnet *ifp; struct mbuf *m; char *frame_header; struct if_proto **proto; { struct gif_softc* gif = (struct gif_softc*)ifp->if_softc; /* Only one protocol may be attached to a gif interface. */ *proto = gif->gif_proto; return 0; } static int gif_add_if(struct ifnet *ifp) { ifp->if_demux = gif_demux; 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) { /* Only one protocol may be attached at a time */ struct gif_softc* gif = (struct gif_softc*)proto->ifp; if (gif->gif_proto != NULL) printf("gif_add_proto: request add_proto for gif%d\n", gif->gif_if.if_unit); gif->gif_proto = proto; return 0; } static int gif_del_proto(struct if_proto *proto, u_long dl_tag) { if (((struct gif_softc*)proto->ifp)->gif_proto == proto) ((struct gif_softc*)proto->ifp)->gif_proto = NULL; else return ENOENT; return 0; } int gif_shutdown() { return 0; } void gif_reg_if_mods() { struct dlil_ifmod_reg_str gif_ifmod; bzero(&gif_ifmod, sizeof(gif_ifmod)); 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; if (dlil_reg_if_modules(APPLE_IF_FAM_GIF, &gif_ifmod)) panic("Couldn't register gif modules\n"); } /* Glue code to attach inet to a gif interface through DLIL */ u_long gif_attach_proto_family(struct ifnet *ifp, int af) { struct dlil_proto_reg_str reg; struct dlil_demux_desc desc; u_long dl_tag=0; short native=0; int stat; /* Check if we're already attached */ stat = dlil_find_dltag(ifp->if_family, ifp->if_unit, af, &dl_tag); if (stat == 0) return 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 = 0; reg.default_proto = 0; reg.protocol_family = af; stat = dlil_attach_protocol(®, &dl_tag); if (stat) { panic("gif_attach_proto_family can't attach interface fam=%d\n", af); } return dl_tag; } u_long gif_detach_proto_family(struct ifnet *ifp, int af) { u_long ip_dl_tag = 0; int stat; stat = dlil_find_dltag(ifp->if_family, ifp->if_unit, af, &ip_dl_tag); if (stat == 0) { stat = dlil_detach_protocol(ip_dl_tag); if (stat) { printf("WARNING: gif_detach can't detach IP fam=%d from interface\n", af); } } return (stat); } int gif_attach_inet(struct ifnet *ifp, u_long *dl_tag) { *dl_tag = gif_attach_proto_family(ifp, AF_INET); return 0; } int gif_detach_inet(struct ifnet *ifp, u_long dl_tag) { gif_detach_proto_family(ifp, AF_INET); return 0; } int gif_attach_inet6(struct ifnet *ifp, u_long *dl_tag) { *dl_tag = gif_attach_proto_family(ifp, AF_INET6); return 0; } int gif_detach_inet6(struct ifnet *ifp, u_long dl_tag) { gif_detach_proto_family(ifp, AF_INET6); return 0; } #endif /* Function to setup the first gif interface */ void gifattach(void) { struct dlil_protomod_reg_str gif_protoreg; int error; /* Init the list of interfaces */ TAILQ_INIT(&gifs); gif_reg_if_mods(); /* DLIL modules */ /* Register protocol registration functions */ bzero(&gif_protoreg, sizeof(gif_protoreg)); gif_protoreg.attach_proto = gif_attach_inet; gif_protoreg.detach_proto = gif_detach_inet; if ( error = dlil_reg_proto_module(AF_INET, APPLE_IF_FAM_GIF, &gif_protoreg) != 0) printf("dlil_reg_proto_module failed for AF_INET error=%d\n", error); gif_protoreg.attach_proto = gif_attach_inet6; gif_protoreg.detach_proto = gif_detach_inet6; if ( error = dlil_reg_proto_module(AF_INET6, APPLE_IF_FAM_GIF, &gif_protoreg) != 0) printf("dlil_reg_proto_module failed for AF_INET6 error=%d\n", error); /* Create first device */ gif_create_dev(); } /* Creates another gif device if there are none free */ static void gif_create_dev(void) { struct gif_softc *sc; /* 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; } sc = _MALLOC(sizeof(struct gif_softc), M_DEVBUF, M_WAITOK); if (sc == NULL) { log(LOG_ERR, "gifattach: failed to allocate gif%d\n", ngif); return; } 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 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; } #endif #ifdef 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)); FREE(sc, M_DEVBUF); return; } #endif 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; #if 0 /* turn off ingress filter */ sc->gif_if.if_flags |= IFF_LINK2; #endif 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; dlil_if_attach(&sc->gif_if); bpfattach(&sc->gif_if, DLT_NULL, sizeof(u_int)); TAILQ_INSERT_TAIL(&gifs, sc, gif_link); ngif++; } static int gif_encapcheck(m, off, proto, arg) const struct mbuf *m; int off; int proto; void *arg; { struct ip ip; struct gif_softc *sc; sc = (struct gif_softc *)arg; if (sc == NULL) return 0; if ((sc->gif_if.if_flags & IFF_UP) == 0) return 0; /* no physical address */ if (!sc->gif_psrc || !sc->gif_pdst) return 0; switch (proto) { #if INET case IPPROTO_IPV4: break; #endif #if INET6 case IPPROTO_IPV6: break; #endif default: return 0; } /* LINTED const cast */ m_copydata((struct mbuf *)m, 0, sizeof(ip), (caddr_t)&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); #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); #endif default: return 0; } } int gif_pre_output(ifp, m0, dst, rt, frame, address, dl_tag) struct ifnet *ifp; struct mbuf **m0; struct sockaddr *dst; caddr_t rt; char *frame; char *address; u_long dl_tag; { struct gif_softc *sc = (struct gif_softc*)ifp; register struct mbuf * m = *m0; int error = 0; static int called = 0; /* XXX: MUTEX */ /* * 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); /* free it here not in dlil_output*/ error = EIO; /* is there better errno? */ goto end; } getmicrotime(&ifp->if_lastchange); 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 */ 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 af = dst->sa_family; m0.m_next = m; m0.m_len = 4; m0.m_data = (char *)⁡ bpf_mtap(ifp, &m0); } ifp->if_opackets++; ifp->if_obytes += m->m_pkthdr.len; /* inner AF-specific encapsulation */ /* XXX should we check if our outer source is legal? */ /* 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); break; #endif #if INET6 case AF_INET6: error = in6_gif_output(ifp, dst->sa_family, m, (struct rtentry*)rt); break; #endif default: error = ENETDOWN; goto end; } end: called = 0; /* reset recursion counter */ 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++; } if (error == 0) error = EJUSTRETURN; /* if no error, packet got sent already */ return error; } int gif_input(m, frame_header, gifp, dl_tag, sync_ok) struct mbuf *m; char* frame_header; struct ifnet* gifp; u_long dl_tag; int sync_ok; { int s, isr; struct ifqueue *ifq = 0; int af; if (gifp == NULL) { /* just in case */ m_freem(m); return; } /* Assume packet is of type of protocol attached to this interface */ af = ((struct gif_softc*)(gifp->if_softc))->gif_proto->protocol_family; 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 af1 = af; m0.m_next = m; m0.m_len = 4; m0.m_data = (char *)&af1; bpf_mtap(gifp, &m0); } /* * 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. */ 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 (EJUSTRETURN); } s = splimp(); if (IF_QFULL(ifq)) { IF_DROP(ifq); /* update statistics */ m_freem(m); splx(s); return (EJUSTRETURN); } 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 (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; { struct gif_softc *sc = (struct gif_softc*)ifp; struct ifreq *ifr = (struct ifreq*)data; int error = 0, size; struct sockaddr *dst, *src; struct sockaddr *sa; int s; 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_long mtu; mtu = ifr->ifr_mtu; if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) { return (EINVAL); } ifp->if_mtu = mtu; } break; #endif /* SIOCSIFMTU */ case SIOCSIFPHYADDR: #if INET6 case SIOCSIFPHYADDR_IN6: #endif /* INET6 */ case SIOCSLIFPHYADDR: 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: src = (struct sockaddr *) &(((struct in6_aliasreq *)data)->ifra_addr); dst = (struct sockaddr *) &(((struct in6_aliasreq *)data)->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) 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; break; #endif default: return EAFNOSUPPORT; } switch (dst->sa_family) { #if INET case AF_INET: 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)) return EINVAL; break; #endif default: return EAFNOSUPPORT; } /* 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: if (src->sa_family == AF_INET6) break; return EAFNOSUPPORT; #endif /* INET6 */ case SIOCSLIFPHYADDR: /* checks done in the above */ break; } TAILQ_FOREACH(ifp2, &ifnet, if_link) { if (strcmp(ifp2->if_name, GIFNAME) != 0) continue; sc2 = ifp2->if_softc; if (sc2 == sc) continue; if (!sc2->gif_pdst || !sc2->gif_psrc) 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) 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) { error = EADDRNOTAVAIL; goto bad; } #endif /* can't configure multiple multi-dest interfaces */ #define multidest(x) \ (((struct sockaddr_in *)(x))->sin_addr.s_addr == INADDR_ANY) #if INET6 #define multidest6(x) \ (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(x))->sin6_addr)) #endif if (dst->sa_family == AF_INET && multidest(dst) && multidest(sc2->gif_pdst)) { error = EADDRNOTAVAIL; goto bad; } #if INET6 if (dst->sa_family == AF_INET6 && multidest6(dst) && multidest6(sc2->gif_pdst)) { error = EADDRNOTAVAIL; goto bad; } #endif } if (sc->gif_psrc) FREE((caddr_t)sc->gif_psrc, M_IFADDR); sa = (struct sockaddr *)_MALLOC(src->sa_len, M_IFADDR, M_WAITOK); 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); bcopy((caddr_t)dst, (caddr_t)sa, dst->sa_len); sc->gif_pdst = sa; ifp->if_flags |= IFF_RUNNING; gif_attach_proto_family(ifp, src->sa_family); 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); error = 0; break; #ifdef SIOCDIFPHYADDR case SIOCDIFPHYADDR: if (sc->gif_psrc) { FREE((caddr_t)sc->gif_psrc, M_IFADDR); sc->gif_psrc = NULL; } if (sc->gif_pdst) { FREE((caddr_t)sc->gif_pdst, M_IFADDR); sc->gif_pdst = NULL; } /* change the IFF_{UP, RUNNING} flag as well? */ break; #endif case SIOCGIFPSRCADDR: #if INET6 case SIOCGIFPSRCADDR_IN6: #endif /* INET6 */ if (sc->gif_psrc == NULL) { 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 */ #if INET6 case SIOCGIFPSRCADDR_IN6: dst = (struct sockaddr *) &(((struct in6_ifreq *)data)->ifr_addr); size = sizeof(((struct in6_ifreq *)data)->ifr_addr); break; #endif /* INET6 */ default: error = EADDRNOTAVAIL; goto bad; } if (src->sa_len > size) return EINVAL; bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); break; case SIOCGIFPDSTADDR: #if INET6 case SIOCGIFPDSTADDR_IN6: #endif /* INET6 */ if (sc->gif_pdst == NULL) { 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 */ #if INET6 case SIOCGIFPDSTADDR_IN6: dst = (struct sockaddr *) &(((struct in6_ifreq *)data)->ifr_addr); size = sizeof(((struct in6_ifreq *)data)->ifr_addr); break; #endif /* INET6 */ default: error = EADDRNOTAVAIL; goto bad; } if (src->sa_len > size) 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); break; case SIOCSIFFLAGS: /* if_ioctl() takes care of it */ break; default: error = EOPNOTSUPP; break; } bad: return error; } void gif_delete_tunnel(sc) struct gif_softc *sc; { /* XXX: NetBSD protects this function with splsoftnet() */ if (sc->gif_psrc) { FREE((caddr_t)sc->gif_psrc, M_IFADDR); sc->gif_psrc = NULL; } if (sc->gif_pdst) { FREE((caddr_t)sc->gif_pdst, M_IFADDR); sc->gif_pdst = NULL; } /* change the IFF_UP flag as well? */ }