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)
283 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 */
312 if (m->m_pkthdr.len < sizeof(struct ip))
315 m_copydata(m, 0, 1, &ver);
319 if (sc->gif_family != AF_INET)
321 ret = in_gif_encapcheck(m, off, proto, arg);
326 if (m->m_pkthdr.len < sizeof(struct ip6_hdr))
328 if (sc->gif_family != AF_INET6)
330 ret = in6_gif_encapcheck(m, off, proto, arg);
340 gif_transmit(struct ifnet *ifp, struct mbuf *m)
342 struct gif_softc *sc;
343 struct etherip_header *eth;
356 error = mac_ifnet_check_transmit(ifp, m);
364 if ((ifp->if_flags & IFF_MONITOR) != 0 ||
365 (ifp->if_flags & IFF_UP) == 0 ||
366 sc->gif_family == 0 ||
367 (error = gif_check_nesting(ifp, m)) != 0) {
371 /* Now pull back the af that we stashed in the csum_data. */
375 af = m->m_pkthdr.csum_data;
376 m->m_flags &= ~(M_BCAST|M_MCAST);
377 M_SETFIB(m, sc->gif_fibnum);
378 BPF_MTAP2(ifp, &af, sizeof(af), m);
379 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
380 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
381 /* inner AF-specific encapsulation */
386 proto = IPPROTO_IPV4;
387 if (m->m_len < sizeof(struct ip))
388 m = m_pullup(m, sizeof(struct ip));
393 ip = mtod(m, struct ip *);
394 ip_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
395 ECN_NOCARE, &ecn, &ip->ip_tos);
400 proto = IPPROTO_IPV6;
401 if (m->m_len < sizeof(struct ip6_hdr))
402 m = m_pullup(m, sizeof(struct ip6_hdr));
408 ip6 = mtod(m, struct ip6_hdr *);
409 ip6_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
410 ECN_NOCARE, &t, &ip6->ip6_flow);
411 ecn = (ntohl(t) >> 20) & 0xff;
415 proto = IPPROTO_ETHERIP;
416 M_PREPEND(m, sizeof(struct etherip_header), M_NOWAIT);
421 eth = mtod(m, struct etherip_header *);
423 if ((sc->gif_options & GIF_SEND_REVETHIP) != 0) {
425 eth->eip_resvl = ETHERIP_VERSION;
427 eth->eip_ver = ETHERIP_VERSION;
432 error = EAFNOSUPPORT;
436 /* XXX should we check if our outer source is legal? */
437 /* dispatch to output logic based on outer AF */
438 switch (sc->gif_family) {
441 error = in_gif_output(ifp, m, proto, ecn);
446 error = in6_gif_output(ifp, m, proto, ecn);
454 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
459 gif_qflush(struct ifnet *ifp __unused)
464 #define MTAG_GIF 1080679712
466 gif_check_nesting(struct ifnet *ifp, struct mbuf *m)
472 * gif may cause infinite recursion calls when misconfigured.
473 * We'll prevent this by detecting loops.
475 * High nesting level may cause stack exhaustion.
476 * We'll prevent this by introducing upper limit.
480 while ((mtag = m_tag_locate(m, MTAG_GIF, 0, mtag)) != NULL) {
481 if (*(struct ifnet **)(mtag + 1) == ifp) {
482 log(LOG_NOTICE, "%s: loop detected\n", if_name(ifp));
487 if (count > V_max_gif_nesting) {
489 "%s: if_output recursively called too many times(%d)\n",
490 if_name(ifp), count);
493 mtag = m_tag_alloc(MTAG_GIF, 0, sizeof(struct ifnet *), M_NOWAIT);
496 *(struct ifnet **)(mtag + 1) = ifp;
497 m_tag_prepend(m, mtag);
502 gif_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
507 if (dst->sa_family == AF_UNSPEC)
508 bcopy(dst->sa_data, &af, sizeof(af));
512 * Now save the af in the inbound pkt csum data, this is a cheat since
513 * we are using the inbound csum_data field to carry the af over to
514 * the gif_transmit() routine, avoiding using yet another mtag.
516 m->m_pkthdr.csum_data = af;
517 return (ifp->if_transmit(ifp, m));
521 gif_input(struct mbuf *m, struct ifnet *ifp, int proto, uint8_t ecn)
523 struct etherip_header *eip;
531 struct gif_softc *sc;
532 struct ether_header *eh;
533 struct ifnet *oldifp;
534 uint32_t gif_options;
543 gif_options = sc->gif_options;
544 m->m_pkthdr.rcvif = ifp;
550 if (m->m_len < sizeof(struct ip))
551 m = m_pullup(m, sizeof(struct ip));
554 ip = mtod(m, struct ip *);
555 if (ip_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
556 ECN_NOCARE, &ecn, &ip->ip_tos) == 0) {
565 if (m->m_len < sizeof(struct ip6_hdr))
566 m = m_pullup(m, sizeof(struct ip6_hdr));
569 t = htonl((uint32_t)ecn << 20);
570 ip6 = mtod(m, struct ip6_hdr *);
571 if (ip6_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
572 ECN_NOCARE, &t, &ip6->ip6_flow) == 0) {
578 case IPPROTO_ETHERIP:
587 mac_ifnet_create_mbuf(ifp, m);
590 if (bpf_peers_present(ifp->if_bpf)) {
592 bpf_mtap2(ifp->if_bpf, &af1, sizeof(af1), m);
595 if ((ifp->if_flags & IFF_MONITOR) != 0) {
596 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
597 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
602 if (ng_gif_input_p != NULL) {
603 (*ng_gif_input_p)(ifp, &m, af);
609 * Put the packet to the network layer input queue according to the
610 * specified address family.
611 * Note: older versions of gif_input directly called network layer
612 * input functions, e.g. ip6_input, here. We changed the policy to
613 * prevent too many recursive calls of such input functions, which
614 * might cause kernel panic. But the change may introduce another
615 * problem; if the input queue is full, packets are discarded.
616 * The kernel stack overflow really happened, and we believed
617 * queue-full rarely occurs, so we changed the policy.
631 n = sizeof(struct etherip_header) + sizeof(struct ether_header);
636 eip = mtod(m, struct etherip_header *);
638 * GIF_ACCEPT_REVETHIP (enabled by default) intentionally
639 * accepts an EtherIP packet with revered version field in
640 * the header. This is a knob for backward compatibility
641 * with FreeBSD 7.2R or prior.
643 if (eip->eip_ver != ETHERIP_VERSION) {
644 if ((gif_options & GIF_ACCEPT_REVETHIP) == 0 ||
645 eip->eip_resvl != ETHERIP_VERSION) {
646 /* discard unknown versions */
651 m_adj(m, sizeof(struct etherip_header));
653 m->m_flags &= ~(M_BCAST|M_MCAST);
654 m->m_pkthdr.rcvif = ifp;
656 if (ifp->if_bridge) {
658 eh = mtod(m, struct ether_header *);
659 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
660 if (ETHER_IS_BROADCAST(eh->ether_dhost))
661 m->m_flags |= M_BCAST;
663 m->m_flags |= M_MCAST;
664 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
666 BRIDGE_INPUT(ifp, m);
668 if (m != NULL && ifp != oldifp) {
670 * The bridge gave us back itself or one of the
671 * members for which the frame is addressed.
682 if (ng_gif_input_orphan_p != NULL)
683 (*ng_gif_input_orphan_p)(ifp, m, af);
689 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
690 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
691 M_SETFIB(m, ifp->if_fib);
692 netisr_dispatch(isr, m);
695 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
698 /* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */
700 gif_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
703 struct ifreq *ifr = (struct ifreq*)data;
704 struct sockaddr *dst, *src;
705 struct gif_softc *sc;
707 struct sockaddr_in *sin = NULL;
710 struct sockaddr_in6 *sin6 = NULL;
717 ifp->if_flags |= IFF_UP;
724 if (ifr->ifr_mtu < GIF_MTU_MIN ||
725 ifr->ifr_mtu > GIF_MTU_MAX)
728 ifp->if_mtu = ifr->ifr_mtu;
731 sx_xlock(&gif_ioctl_sx);
741 case SIOCSIFPHYADDR_IN6:
747 src = (struct sockaddr *)
748 &(((struct in_aliasreq *)data)->ifra_addr);
749 dst = (struct sockaddr *)
750 &(((struct in_aliasreq *)data)->ifra_dstaddr);
754 case SIOCSIFPHYADDR_IN6:
755 src = (struct sockaddr *)
756 &(((struct in6_aliasreq *)data)->ifra_addr);
757 dst = (struct sockaddr *)
758 &(((struct in6_aliasreq *)data)->ifra_dstaddr);
764 /* sa_family must be equal */
765 if (src->sa_family != dst->sa_family ||
766 src->sa_len != dst->sa_len)
769 /* validate sa_len */
770 switch (src->sa_family) {
773 if (src->sa_len != sizeof(struct sockaddr_in))
779 if (src->sa_len != sizeof(struct sockaddr_in6))
784 error = EAFNOSUPPORT;
787 /* check sa_family looks sane for the cmd */
788 error = EAFNOSUPPORT;
792 if (src->sa_family == AF_INET)
797 case SIOCSIFPHYADDR_IN6:
798 if (src->sa_family == AF_INET6)
803 error = EADDRNOTAVAIL;
804 switch (src->sa_family) {
807 if (satosin(src)->sin_addr.s_addr == INADDR_ANY ||
808 satosin(dst)->sin_addr.s_addr == INADDR_ANY)
814 if (IN6_IS_ADDR_UNSPECIFIED(&satosin6(src)->sin6_addr)
816 IN6_IS_ADDR_UNSPECIFIED(&satosin6(dst)->sin6_addr))
819 * Check validity of the scope zone ID of the
820 * addresses, and convert it into the kernel
821 * internal form if necessary.
823 error = sa6_embedscope(satosin6(src), 0);
826 error = sa6_embedscope(satosin6(dst), 0);
831 error = gif_set_tunnel(ifp, src, dst);
834 gif_delete_tunnel(ifp);
836 case SIOCGIFPSRCADDR:
837 case SIOCGIFPDSTADDR:
839 case SIOCGIFPSRCADDR_IN6:
840 case SIOCGIFPDSTADDR_IN6:
842 if (sc->gif_family == 0) {
843 error = EADDRNOTAVAIL;
849 case SIOCGIFPSRCADDR:
850 case SIOCGIFPDSTADDR:
851 if (sc->gif_family != AF_INET) {
852 error = EADDRNOTAVAIL;
855 sin = (struct sockaddr_in *)&ifr->ifr_addr;
856 memset(sin, 0, sizeof(*sin));
857 sin->sin_family = AF_INET;
858 sin->sin_len = sizeof(*sin);
862 case SIOCGIFPSRCADDR_IN6:
863 case SIOCGIFPDSTADDR_IN6:
864 if (sc->gif_family != AF_INET6) {
865 error = EADDRNOTAVAIL;
868 sin6 = (struct sockaddr_in6 *)
869 &(((struct in6_ifreq *)data)->ifr_addr);
870 memset(sin6, 0, sizeof(*sin6));
871 sin6->sin6_family = AF_INET6;
872 sin6->sin6_len = sizeof(*sin6);
876 error = EAFNOSUPPORT;
881 case SIOCGIFPSRCADDR:
882 sin->sin_addr = sc->gif_iphdr->ip_src;
884 case SIOCGIFPDSTADDR:
885 sin->sin_addr = sc->gif_iphdr->ip_dst;
889 case SIOCGIFPSRCADDR_IN6:
890 sin6->sin6_addr = sc->gif_ip6hdr->ip6_src;
892 case SIOCGIFPDSTADDR_IN6:
893 sin6->sin6_addr = sc->gif_ip6hdr->ip6_dst;
903 case SIOCGIFPSRCADDR:
904 case SIOCGIFPDSTADDR:
905 error = prison_if(curthread->td_ucred,
906 (struct sockaddr *)sin);
908 memset(sin, 0, sizeof(*sin));
912 case SIOCGIFPSRCADDR_IN6:
913 case SIOCGIFPDSTADDR_IN6:
914 error = prison_if(curthread->td_ucred,
915 (struct sockaddr *)sin6);
917 error = sa6_recoverscope(sin6);
919 memset(sin6, 0, sizeof(*sin6));
924 options = sc->gif_options;
925 error = copyout(&options, ifr->ifr_data, sizeof(options));
928 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
930 error = copyin(ifr->ifr_data, &options, sizeof(options));
933 if (options & ~GIF_OPTMASK)
936 sc->gif_options = options;
944 sx_xunlock(&gif_ioctl_sx);
949 gif_detach(struct gif_softc *sc)
952 sx_assert(&gif_ioctl_sx, SA_XLOCKED);
953 if (sc->gif_ecookie != NULL)
954 encap_detach(sc->gif_ecookie);
955 sc->gif_ecookie = NULL;
959 gif_attach(struct gif_softc *sc, int af)
962 sx_assert(&gif_ioctl_sx, SA_XLOCKED);
966 return (in_gif_attach(sc));
970 return (in6_gif_attach(sc));
973 return (EAFNOSUPPORT);
977 gif_set_tunnel(struct ifnet *ifp, struct sockaddr *src, struct sockaddr *dst)
979 struct gif_softc *sc = ifp->if_softc;
980 struct gif_softc *tsc;
992 /* Disallow parallel tunnels unless instructed otherwise. */
993 if (V_parallel_tunnels == 0) {
995 LIST_FOREACH(tsc, &V_gif_softc_list, gif_list) {
996 if (tsc == sc || tsc->gif_family != src->sa_family)
999 if (tsc->gif_family == AF_INET &&
1000 tsc->gif_iphdr->ip_src.s_addr ==
1001 satosin(src)->sin_addr.s_addr &&
1002 tsc->gif_iphdr->ip_dst.s_addr ==
1003 satosin(dst)->sin_addr.s_addr) {
1004 error = EADDRNOTAVAIL;
1010 if (tsc->gif_family == AF_INET6 &&
1011 IN6_ARE_ADDR_EQUAL(&tsc->gif_ip6hdr->ip6_src,
1012 &satosin6(src)->sin6_addr) &&
1013 IN6_ARE_ADDR_EQUAL(&tsc->gif_ip6hdr->ip6_dst,
1014 &satosin6(dst)->sin6_addr)) {
1015 error = EADDRNOTAVAIL;
1023 switch (src->sa_family) {
1026 hdr = ip = malloc(sizeof(struct ip), M_GIF,
1028 ip->ip_src.s_addr = satosin(src)->sin_addr.s_addr;
1029 ip->ip_dst.s_addr = satosin(dst)->sin_addr.s_addr;
1034 hdr = ip6 = malloc(sizeof(struct ip6_hdr), M_GIF,
1036 ip6->ip6_src = satosin6(src)->sin6_addr;
1037 ip6->ip6_dst = satosin6(dst)->sin6_addr;
1038 ip6->ip6_vfc = IPV6_VERSION;
1042 return (EAFNOSUPPORT);
1045 if (sc->gif_family != src->sa_family)
1047 if (sc->gif_family == 0 ||
1048 sc->gif_family != src->sa_family)
1049 error = gif_attach(sc, src->sa_family);
1052 if (sc->gif_family != 0)
1053 free(sc->gif_hdr, M_GIF);
1054 sc->gif_family = src->sa_family;
1057 #if defined(INET) || defined(INET6)
1060 if (error == 0 && sc->gif_family != 0)
1061 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1063 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1068 gif_delete_tunnel(struct ifnet *ifp)
1070 struct gif_softc *sc = ifp->if_softc;
1077 family = sc->gif_family;
1082 free(sc->gif_hdr, M_GIF);
1084 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;