2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $KAME: if_gif.c,v 1.87 2001/10/19 08:50:27 itojun Exp $
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
36 #include "opt_inet6.h"
38 #include <sys/param.h>
39 #include <sys/systm.h>
41 #include <sys/kernel.h>
43 #include <sys/malloc.h>
45 #include <sys/module.h>
46 #include <sys/rmlock.h>
47 #include <sys/socket.h>
48 #include <sys/sockio.h>
50 #include <sys/errno.h>
52 #include <sys/sysctl.h>
53 #include <sys/syslog.h>
56 #include <sys/protosw.h>
58 #include <machine/cpu.h>
61 #include <net/if_var.h>
62 #include <net/if_clone.h>
63 #include <net/if_types.h>
64 #include <net/netisr.h>
65 #include <net/route.h>
69 #include <netinet/in.h>
70 #include <netinet/in_systm.h>
71 #include <netinet/ip.h>
72 #include <netinet/ip_ecn.h>
74 #include <netinet/in_var.h>
75 #include <netinet/ip_var.h>
80 #include <netinet/in.h>
82 #include <netinet6/in6_var.h>
83 #include <netinet/ip6.h>
84 #include <netinet6/ip6_ecn.h>
85 #include <netinet6/ip6_var.h>
86 #include <netinet6/scope6_var.h>
87 #include <netinet6/ip6protosw.h>
90 #include <netinet/ip_encap.h>
91 #include <net/ethernet.h>
92 #include <net/if_bridgevar.h>
93 #include <net/if_gif.h>
95 #include <security/mac/mac_framework.h>
97 static const char gifname[] = "gif";
100 * gif_mtx protects a per-vnet gif_softc_list.
102 static VNET_DEFINE(struct mtx, gif_mtx);
103 #define V_gif_mtx VNET(gif_mtx)
104 static MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface");
105 static VNET_DEFINE(LIST_HEAD(, gif_softc), gif_softc_list);
106 #define V_gif_softc_list VNET(gif_softc_list)
107 static struct sx gif_ioctl_sx;
108 SX_SYSINIT(gif_ioctl_sx, &gif_ioctl_sx, "gif_ioctl");
110 #define GIF_LIST_LOCK_INIT(x) mtx_init(&V_gif_mtx, "gif_mtx", \
112 #define GIF_LIST_LOCK_DESTROY(x) mtx_destroy(&V_gif_mtx)
113 #define GIF_LIST_LOCK(x) mtx_lock(&V_gif_mtx)
114 #define GIF_LIST_UNLOCK(x) mtx_unlock(&V_gif_mtx)
116 void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, int af);
117 void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, int af);
118 void (*ng_gif_attach_p)(struct ifnet *ifp);
119 void (*ng_gif_detach_p)(struct ifnet *ifp);
121 static int gif_check_nesting(struct ifnet *, struct mbuf *);
122 static int gif_set_tunnel(struct ifnet *, struct sockaddr *,
124 static void gif_delete_tunnel(struct ifnet *);
125 static int gif_ioctl(struct ifnet *, u_long, caddr_t);
126 static int gif_transmit(struct ifnet *, struct mbuf *);
127 static void gif_qflush(struct ifnet *);
128 static int gif_clone_create(struct if_clone *, int, caddr_t);
129 static void gif_clone_destroy(struct ifnet *);
130 static VNET_DEFINE(struct if_clone *, gif_cloner);
131 #define V_gif_cloner VNET(gif_cloner)
133 static int gifmodevent(module_t, int, void *);
135 SYSCTL_DECL(_net_link);
136 static SYSCTL_NODE(_net_link, IFT_GIF, gif, CTLFLAG_RW, 0,
137 "Generic Tunnel Interface");
140 * This macro controls the default upper limitation on nesting of gif tunnels.
141 * Since, setting a large value to this macro with a careless configuration
142 * may introduce system crash, we don't allow any nestings by default.
143 * If you need to configure nested gif tunnels, you can define this macro
144 * in your kernel configuration file. However, if you do so, please be
145 * careful to configure the tunnels so that it won't make a loop.
147 #define MAX_GIF_NEST 1
149 static VNET_DEFINE(int, max_gif_nesting) = MAX_GIF_NEST;
150 #define V_max_gif_nesting VNET(max_gif_nesting)
151 SYSCTL_INT(_net_link_gif, OID_AUTO, max_nesting, CTLFLAG_VNET | CTLFLAG_RW,
152 &VNET_NAME(max_gif_nesting), 0, "Max nested tunnels");
155 * By default, we disallow creation of multiple tunnels between the same
156 * pair of addresses. Some applications require this functionality so
157 * we allow control over this check here.
160 static VNET_DEFINE(int, parallel_tunnels) = 1;
162 static VNET_DEFINE(int, parallel_tunnels) = 0;
164 #define V_parallel_tunnels VNET(parallel_tunnels)
165 SYSCTL_INT(_net_link_gif, OID_AUTO, parallel_tunnels,
166 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(parallel_tunnels), 0,
167 "Allow parallel tunnels?");
169 /* copy from src/sys/net/if_ethersubr.c */
170 static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] =
171 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
172 #ifndef ETHER_IS_BROADCAST
173 #define ETHER_IS_BROADCAST(addr) \
174 (bcmp(etherbroadcastaddr, (addr), ETHER_ADDR_LEN) == 0)
178 gif_clone_create(struct if_clone *ifc, int unit, caddr_t params)
180 struct gif_softc *sc;
182 sc = malloc(sizeof(struct gif_softc), M_GIF, M_WAITOK | M_ZERO);
183 sc->gif_fibnum = curthread->td_proc->p_fibnum;
184 GIF2IFP(sc) = if_alloc(IFT_GIF);
186 GIF2IFP(sc)->if_softc = sc;
187 if_initname(GIF2IFP(sc), gifname, unit);
189 GIF2IFP(sc)->if_addrlen = 0;
190 GIF2IFP(sc)->if_mtu = GIF_MTU;
191 GIF2IFP(sc)->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
193 /* turn off ingress filter */
194 GIF2IFP(sc)->if_flags |= IFF_LINK2;
196 GIF2IFP(sc)->if_ioctl = gif_ioctl;
197 GIF2IFP(sc)->if_transmit = gif_transmit;
198 GIF2IFP(sc)->if_qflush = gif_qflush;
199 GIF2IFP(sc)->if_output = gif_output;
200 if_attach(GIF2IFP(sc));
201 bpfattach(GIF2IFP(sc), DLT_NULL, sizeof(u_int32_t));
202 if (ng_gif_attach_p != NULL)
203 (*ng_gif_attach_p)(GIF2IFP(sc));
206 LIST_INSERT_HEAD(&V_gif_softc_list, sc, gif_list);
212 gif_clone_destroy(struct ifnet *ifp)
214 struct gif_softc *sc;
216 sx_xlock(&gif_ioctl_sx);
218 gif_delete_tunnel(ifp);
220 LIST_REMOVE(sc, gif_list);
222 if (ng_gif_detach_p != NULL)
223 (*ng_gif_detach_p)(ifp);
226 ifp->if_softc = NULL;
227 sx_xunlock(&gif_ioctl_sx);
230 GIF_LOCK_DESTROY(sc);
235 vnet_gif_init(const void *unused __unused)
238 LIST_INIT(&V_gif_softc_list);
239 GIF_LIST_LOCK_INIT();
240 V_gif_cloner = if_clone_simple(gifname, gif_clone_create,
241 gif_clone_destroy, 0);
243 VNET_SYSINIT(vnet_gif_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
244 vnet_gif_init, NULL);
247 vnet_gif_uninit(const void *unused __unused)
250 if_clone_detach(V_gif_cloner);
251 GIF_LIST_LOCK_DESTROY();
253 VNET_SYSUNINIT(vnet_gif_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
254 vnet_gif_uninit, NULL);
257 gifmodevent(module_t mod, int type, void *data)
270 static moduledata_t gif_mod = {
276 DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
277 MODULE_VERSION(if_gif, 1);
280 gif_encapcheck(const struct mbuf *m, int off, int proto, void *arg)
284 struct gif_softc *sc;
287 sc = (struct gif_softc *)arg;
288 if (sc == NULL || (GIF2IFP(sc)->if_flags & IFF_UP) == 0)
294 /* no physical address */
295 if (sc->gif_family == 0)
305 case IPPROTO_ETHERIP:
311 /* Bail on short packets */
313 if (m->m_pkthdr.len < sizeof(struct ip))
316 ip = mtod(m, const struct ip *);
320 if (sc->gif_family != AF_INET)
322 ret = in_gif_encapcheck(m, off, proto, arg);
327 if (m->m_pkthdr.len < sizeof(struct ip6_hdr))
329 if (sc->gif_family != AF_INET6)
331 ret = in6_gif_encapcheck(m, off, proto, arg);
341 gif_transmit(struct ifnet *ifp, struct mbuf *m)
343 struct gif_softc *sc;
344 struct etherip_header *eth;
357 error = mac_ifnet_check_transmit(ifp, m);
365 if ((ifp->if_flags & IFF_MONITOR) != 0 ||
366 (ifp->if_flags & IFF_UP) == 0 ||
367 sc->gif_family == 0 ||
368 (error = gif_check_nesting(ifp, m)) != 0) {
372 /* Now pull back the af that we stashed in the csum_data. */
376 af = m->m_pkthdr.csum_data;
377 m->m_flags &= ~(M_BCAST|M_MCAST);
378 M_SETFIB(m, sc->gif_fibnum);
379 BPF_MTAP2(ifp, &af, sizeof(af), m);
380 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
381 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
382 /* inner AF-specific encapsulation */
387 proto = IPPROTO_IPV4;
388 if (m->m_len < sizeof(struct ip))
389 m = m_pullup(m, sizeof(struct ip));
394 ip = mtod(m, struct ip *);
395 ip_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
396 ECN_NOCARE, &ecn, &ip->ip_tos);
401 proto = IPPROTO_IPV6;
402 if (m->m_len < sizeof(struct ip6_hdr))
403 m = m_pullup(m, sizeof(struct ip6_hdr));
409 ip6 = mtod(m, struct ip6_hdr *);
410 ip6_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
411 ECN_NOCARE, &t, &ip6->ip6_flow);
412 ecn = (ntohl(t) >> 20) & 0xff;
416 proto = IPPROTO_ETHERIP;
417 M_PREPEND(m, sizeof(struct etherip_header), M_NOWAIT);
422 eth = mtod(m, struct etherip_header *);
424 if ((sc->gif_options & GIF_SEND_REVETHIP) != 0) {
426 eth->eip_resvl = ETHERIP_VERSION;
428 eth->eip_ver = ETHERIP_VERSION;
433 error = EAFNOSUPPORT;
437 /* XXX should we check if our outer source is legal? */
438 /* dispatch to output logic based on outer AF */
439 switch (sc->gif_family) {
442 error = in_gif_output(ifp, m, proto, ecn);
447 error = in6_gif_output(ifp, m, proto, ecn);
455 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
460 gif_qflush(struct ifnet *ifp __unused)
465 #define MTAG_GIF 1080679712
467 gif_check_nesting(struct ifnet *ifp, struct mbuf *m)
473 * gif may cause infinite recursion calls when misconfigured.
474 * We'll prevent this by detecting loops.
476 * High nesting level may cause stack exhaustion.
477 * We'll prevent this by introducing upper limit.
481 while ((mtag = m_tag_locate(m, MTAG_GIF, 0, mtag)) != NULL) {
482 if (*(struct ifnet **)(mtag + 1) == ifp) {
483 log(LOG_NOTICE, "%s: loop detected\n", if_name(ifp));
488 if (count > V_max_gif_nesting) {
490 "%s: if_output recursively called too many times(%d)\n",
491 if_name(ifp), count);
494 mtag = m_tag_alloc(MTAG_GIF, 0, sizeof(struct ifnet *), M_NOWAIT);
497 *(struct ifnet **)(mtag + 1) = ifp;
498 m_tag_prepend(m, mtag);
503 gif_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
508 if (dst->sa_family == AF_UNSPEC)
509 bcopy(dst->sa_data, &af, sizeof(af));
513 * Now save the af in the inbound pkt csum data, this is a cheat since
514 * we are using the inbound csum_data field to carry the af over to
515 * the gif_transmit() routine, avoiding using yet another mtag.
517 m->m_pkthdr.csum_data = af;
518 return (ifp->if_transmit(ifp, m));
522 gif_input(struct mbuf *m, struct ifnet *ifp, int proto, uint8_t ecn)
524 struct etherip_header *eip;
532 struct gif_softc *sc;
533 struct ether_header *eh;
534 struct ifnet *oldifp;
535 uint32_t gif_options;
544 gif_options = sc->gif_options;
545 m->m_pkthdr.rcvif = ifp;
551 if (m->m_len < sizeof(struct ip))
552 m = m_pullup(m, sizeof(struct ip));
555 ip = mtod(m, struct ip *);
556 if (ip_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
557 ECN_NOCARE, &ecn, &ip->ip_tos) == 0) {
566 if (m->m_len < sizeof(struct ip6_hdr))
567 m = m_pullup(m, sizeof(struct ip6_hdr));
570 t = htonl((uint32_t)ecn << 20);
571 ip6 = mtod(m, struct ip6_hdr *);
572 if (ip6_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
573 ECN_NOCARE, &t, &ip6->ip6_flow) == 0) {
579 case IPPROTO_ETHERIP:
588 mac_ifnet_create_mbuf(ifp, m);
591 if (bpf_peers_present(ifp->if_bpf)) {
593 bpf_mtap2(ifp->if_bpf, &af1, sizeof(af1), m);
596 if ((ifp->if_flags & IFF_MONITOR) != 0) {
597 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
598 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
603 if (ng_gif_input_p != NULL) {
604 (*ng_gif_input_p)(ifp, &m, af);
610 * Put the packet to the network layer input queue according to the
611 * specified address family.
612 * Note: older versions of gif_input directly called network layer
613 * input functions, e.g. ip6_input, here. We changed the policy to
614 * prevent too many recursive calls of such input functions, which
615 * might cause kernel panic. But the change may introduce another
616 * problem; if the input queue is full, packets are discarded.
617 * The kernel stack overflow really happened, and we believed
618 * queue-full rarely occurs, so we changed the policy.
632 n = sizeof(struct etherip_header) + sizeof(struct ether_header);
637 eip = mtod(m, struct etherip_header *);
639 * GIF_ACCEPT_REVETHIP (enabled by default) intentionally
640 * accepts an EtherIP packet with revered version field in
641 * the header. This is a knob for backward compatibility
642 * with FreeBSD 7.2R or prior.
644 if (eip->eip_ver != ETHERIP_VERSION) {
645 if ((gif_options & GIF_ACCEPT_REVETHIP) == 0 ||
646 eip->eip_resvl != ETHERIP_VERSION) {
647 /* discard unknown versions */
652 m_adj(m, sizeof(struct etherip_header));
654 m->m_flags &= ~(M_BCAST|M_MCAST);
655 m->m_pkthdr.rcvif = ifp;
657 if (ifp->if_bridge) {
659 eh = mtod(m, struct ether_header *);
660 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
661 if (ETHER_IS_BROADCAST(eh->ether_dhost))
662 m->m_flags |= M_BCAST;
664 m->m_flags |= M_MCAST;
665 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
667 BRIDGE_INPUT(ifp, m);
669 if (m != NULL && ifp != oldifp) {
671 * The bridge gave us back itself or one of the
672 * members for which the frame is addressed.
683 if (ng_gif_input_orphan_p != NULL)
684 (*ng_gif_input_orphan_p)(ifp, m, af);
690 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
691 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
692 M_SETFIB(m, ifp->if_fib);
693 netisr_dispatch(isr, m);
696 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
699 /* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */
701 gif_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
704 struct ifreq *ifr = (struct ifreq*)data;
705 struct sockaddr *dst, *src;
706 struct gif_softc *sc;
708 struct sockaddr_in *sin = NULL;
711 struct sockaddr_in6 *sin6 = NULL;
718 ifp->if_flags |= IFF_UP;
725 if (ifr->ifr_mtu < GIF_MTU_MIN ||
726 ifr->ifr_mtu > GIF_MTU_MAX)
729 ifp->if_mtu = ifr->ifr_mtu;
732 sx_xlock(&gif_ioctl_sx);
742 case SIOCSIFPHYADDR_IN6:
748 src = (struct sockaddr *)
749 &(((struct in_aliasreq *)data)->ifra_addr);
750 dst = (struct sockaddr *)
751 &(((struct in_aliasreq *)data)->ifra_dstaddr);
755 case SIOCSIFPHYADDR_IN6:
756 src = (struct sockaddr *)
757 &(((struct in6_aliasreq *)data)->ifra_addr);
758 dst = (struct sockaddr *)
759 &(((struct in6_aliasreq *)data)->ifra_dstaddr);
765 /* sa_family must be equal */
766 if (src->sa_family != dst->sa_family ||
767 src->sa_len != dst->sa_len)
770 /* validate sa_len */
771 switch (src->sa_family) {
774 if (src->sa_len != sizeof(struct sockaddr_in))
780 if (src->sa_len != sizeof(struct sockaddr_in6))
785 error = EAFNOSUPPORT;
788 /* check sa_family looks sane for the cmd */
789 error = EAFNOSUPPORT;
793 if (src->sa_family == AF_INET)
798 case SIOCSIFPHYADDR_IN6:
799 if (src->sa_family == AF_INET6)
804 error = EADDRNOTAVAIL;
805 switch (src->sa_family) {
808 if (satosin(src)->sin_addr.s_addr == INADDR_ANY ||
809 satosin(dst)->sin_addr.s_addr == INADDR_ANY)
815 if (IN6_IS_ADDR_UNSPECIFIED(&satosin6(src)->sin6_addr)
817 IN6_IS_ADDR_UNSPECIFIED(&satosin6(dst)->sin6_addr))
820 * Check validity of the scope zone ID of the
821 * addresses, and convert it into the kernel
822 * internal form if necessary.
824 error = sa6_embedscope(satosin6(src), 0);
827 error = sa6_embedscope(satosin6(dst), 0);
832 error = gif_set_tunnel(ifp, src, dst);
835 gif_delete_tunnel(ifp);
837 case SIOCGIFPSRCADDR:
838 case SIOCGIFPDSTADDR:
840 case SIOCGIFPSRCADDR_IN6:
841 case SIOCGIFPDSTADDR_IN6:
843 if (sc->gif_family == 0) {
844 error = EADDRNOTAVAIL;
850 case SIOCGIFPSRCADDR:
851 case SIOCGIFPDSTADDR:
852 if (sc->gif_family != AF_INET) {
853 error = EADDRNOTAVAIL;
856 sin = (struct sockaddr_in *)&ifr->ifr_addr;
857 memset(sin, 0, sizeof(*sin));
858 sin->sin_family = AF_INET;
859 sin->sin_len = sizeof(*sin);
863 case SIOCGIFPSRCADDR_IN6:
864 case SIOCGIFPDSTADDR_IN6:
865 if (sc->gif_family != AF_INET6) {
866 error = EADDRNOTAVAIL;
869 sin6 = (struct sockaddr_in6 *)
870 &(((struct in6_ifreq *)data)->ifr_addr);
871 memset(sin6, 0, sizeof(*sin6));
872 sin6->sin6_family = AF_INET6;
873 sin6->sin6_len = sizeof(*sin6);
877 error = EAFNOSUPPORT;
882 case SIOCGIFPSRCADDR:
883 sin->sin_addr = sc->gif_iphdr->ip_src;
885 case SIOCGIFPDSTADDR:
886 sin->sin_addr = sc->gif_iphdr->ip_dst;
890 case SIOCGIFPSRCADDR_IN6:
891 sin6->sin6_addr = sc->gif_ip6hdr->ip6_src;
893 case SIOCGIFPDSTADDR_IN6:
894 sin6->sin6_addr = sc->gif_ip6hdr->ip6_dst;
904 case SIOCGIFPSRCADDR:
905 case SIOCGIFPDSTADDR:
906 error = prison_if(curthread->td_ucred,
907 (struct sockaddr *)sin);
909 memset(sin, 0, sizeof(*sin));
913 case SIOCGIFPSRCADDR_IN6:
914 case SIOCGIFPDSTADDR_IN6:
915 error = prison_if(curthread->td_ucred,
916 (struct sockaddr *)sin6);
918 error = sa6_recoverscope(sin6);
920 memset(sin6, 0, sizeof(*sin6));
925 ifr->ifr_fib = sc->gif_fibnum;
928 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
930 if (ifr->ifr_fib >= rt_numfibs)
933 sc->gif_fibnum = ifr->ifr_fib;
936 options = sc->gif_options;
937 error = copyout(&options, ifr->ifr_data, sizeof(options));
940 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
942 error = copyin(ifr->ifr_data, &options, sizeof(options));
945 if (options & ~GIF_OPTMASK)
948 sc->gif_options = options;
955 sx_xunlock(&gif_ioctl_sx);
960 gif_detach(struct gif_softc *sc)
963 sx_assert(&gif_ioctl_sx, SA_XLOCKED);
964 if (sc->gif_ecookie != NULL)
965 encap_detach(sc->gif_ecookie);
966 sc->gif_ecookie = NULL;
970 gif_attach(struct gif_softc *sc, int af)
973 sx_assert(&gif_ioctl_sx, SA_XLOCKED);
977 return (in_gif_attach(sc));
981 return (in6_gif_attach(sc));
984 return (EAFNOSUPPORT);
988 gif_set_tunnel(struct ifnet *ifp, struct sockaddr *src, struct sockaddr *dst)
990 struct gif_softc *sc = ifp->if_softc;
991 struct gif_softc *tsc;
1003 /* Disallow parallel tunnels unless instructed otherwise. */
1004 if (V_parallel_tunnels == 0) {
1006 LIST_FOREACH(tsc, &V_gif_softc_list, gif_list) {
1007 if (tsc == sc || tsc->gif_family != src->sa_family)
1010 if (tsc->gif_family == AF_INET &&
1011 tsc->gif_iphdr->ip_src.s_addr ==
1012 satosin(src)->sin_addr.s_addr &&
1013 tsc->gif_iphdr->ip_dst.s_addr ==
1014 satosin(dst)->sin_addr.s_addr) {
1015 error = EADDRNOTAVAIL;
1021 if (tsc->gif_family == AF_INET6 &&
1022 IN6_ARE_ADDR_EQUAL(&tsc->gif_ip6hdr->ip6_src,
1023 &satosin6(src)->sin6_addr) &&
1024 IN6_ARE_ADDR_EQUAL(&tsc->gif_ip6hdr->ip6_dst,
1025 &satosin6(dst)->sin6_addr)) {
1026 error = EADDRNOTAVAIL;
1034 switch (src->sa_family) {
1037 hdr = ip = malloc(sizeof(struct ip), M_GIF,
1039 ip->ip_src.s_addr = satosin(src)->sin_addr.s_addr;
1040 ip->ip_dst.s_addr = satosin(dst)->sin_addr.s_addr;
1045 hdr = ip6 = malloc(sizeof(struct ip6_hdr), M_GIF,
1047 ip6->ip6_src = satosin6(src)->sin6_addr;
1048 ip6->ip6_dst = satosin6(dst)->sin6_addr;
1049 ip6->ip6_vfc = IPV6_VERSION;
1053 return (EAFNOSUPPORT);
1056 if (sc->gif_family != src->sa_family)
1058 if (sc->gif_family == 0 ||
1059 sc->gif_family != src->sa_family)
1060 error = gif_attach(sc, src->sa_family);
1063 if (sc->gif_family != 0)
1064 free(sc->gif_hdr, M_GIF);
1065 sc->gif_family = src->sa_family;
1068 #if defined(INET) || defined(INET6)
1071 if (error == 0 && sc->gif_family != 0)
1072 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1074 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1079 gif_delete_tunnel(struct ifnet *ifp)
1081 struct gif_softc *sc = ifp->if_softc;
1088 family = sc->gif_family;
1093 free(sc->gif_hdr, M_GIF);
1095 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;