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 GIF2IFP(sc)->if_capabilities |= IFCAP_LINKSTATE;
201 GIF2IFP(sc)->if_capenable |= IFCAP_LINKSTATE;
202 if_attach(GIF2IFP(sc));
203 bpfattach(GIF2IFP(sc), DLT_NULL, sizeof(u_int32_t));
204 if (ng_gif_attach_p != NULL)
205 (*ng_gif_attach_p)(GIF2IFP(sc));
208 LIST_INSERT_HEAD(&V_gif_softc_list, sc, gif_list);
214 gif_clone_destroy(struct ifnet *ifp)
216 struct gif_softc *sc;
218 sx_xlock(&gif_ioctl_sx);
220 gif_delete_tunnel(ifp);
222 LIST_REMOVE(sc, gif_list);
224 if (ng_gif_detach_p != NULL)
225 (*ng_gif_detach_p)(ifp);
228 ifp->if_softc = NULL;
229 sx_xunlock(&gif_ioctl_sx);
232 GIF_LOCK_DESTROY(sc);
237 vnet_gif_init(const void *unused __unused)
240 LIST_INIT(&V_gif_softc_list);
241 GIF_LIST_LOCK_INIT();
242 V_gif_cloner = if_clone_simple(gifname, gif_clone_create,
243 gif_clone_destroy, 0);
245 VNET_SYSINIT(vnet_gif_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
246 vnet_gif_init, NULL);
249 vnet_gif_uninit(const void *unused __unused)
252 if_clone_detach(V_gif_cloner);
253 GIF_LIST_LOCK_DESTROY();
255 VNET_SYSUNINIT(vnet_gif_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
256 vnet_gif_uninit, NULL);
259 gifmodevent(module_t mod, int type, void *data)
272 static moduledata_t gif_mod = {
278 DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
279 MODULE_VERSION(if_gif, 1);
282 gif_encapcheck(const struct mbuf *m, int off, int proto, void *arg)
286 struct gif_softc *sc;
289 sc = (struct gif_softc *)arg;
290 if (sc == NULL || (GIF2IFP(sc)->if_flags & IFF_UP) == 0)
296 /* no physical address */
297 if (sc->gif_family == 0)
307 case IPPROTO_ETHERIP:
313 /* Bail on short packets */
315 if (m->m_pkthdr.len < sizeof(struct ip))
318 ip = mtod(m, const struct ip *);
322 if (sc->gif_family != AF_INET)
324 ret = in_gif_encapcheck(m, off, proto, arg);
329 if (m->m_pkthdr.len < sizeof(struct ip6_hdr))
331 if (sc->gif_family != AF_INET6)
333 ret = in6_gif_encapcheck(m, off, proto, arg);
343 gif_transmit(struct ifnet *ifp, struct mbuf *m)
345 struct gif_softc *sc;
346 struct etherip_header *eth;
359 error = mac_ifnet_check_transmit(ifp, m);
367 if ((ifp->if_flags & IFF_MONITOR) != 0 ||
368 (ifp->if_flags & IFF_UP) == 0 ||
369 sc->gif_family == 0 ||
370 (error = gif_check_nesting(ifp, m)) != 0) {
374 /* Now pull back the af that we stashed in the csum_data. */
378 af = m->m_pkthdr.csum_data;
379 m->m_flags &= ~(M_BCAST|M_MCAST);
380 M_SETFIB(m, sc->gif_fibnum);
381 BPF_MTAP2(ifp, &af, sizeof(af), m);
382 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
383 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
384 /* inner AF-specific encapsulation */
389 proto = IPPROTO_IPV4;
390 if (m->m_len < sizeof(struct ip))
391 m = m_pullup(m, sizeof(struct ip));
396 ip = mtod(m, struct ip *);
397 ip_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
398 ECN_NOCARE, &ecn, &ip->ip_tos);
403 proto = IPPROTO_IPV6;
404 if (m->m_len < sizeof(struct ip6_hdr))
405 m = m_pullup(m, sizeof(struct ip6_hdr));
411 ip6 = mtod(m, struct ip6_hdr *);
412 ip6_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
413 ECN_NOCARE, &t, &ip6->ip6_flow);
414 ecn = (ntohl(t) >> 20) & 0xff;
418 proto = IPPROTO_ETHERIP;
419 M_PREPEND(m, sizeof(struct etherip_header), M_NOWAIT);
424 eth = mtod(m, struct etherip_header *);
426 eth->eip_ver = ETHERIP_VERSION;
430 error = EAFNOSUPPORT;
434 /* XXX should we check if our outer source is legal? */
435 /* dispatch to output logic based on outer AF */
436 switch (sc->gif_family) {
439 error = in_gif_output(ifp, m, proto, ecn);
444 error = in6_gif_output(ifp, m, proto, ecn);
452 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
457 gif_qflush(struct ifnet *ifp __unused)
462 #define MTAG_GIF 1080679712
464 gif_check_nesting(struct ifnet *ifp, struct mbuf *m)
470 * gif may cause infinite recursion calls when misconfigured.
471 * We'll prevent this by detecting loops.
473 * High nesting level may cause stack exhaustion.
474 * We'll prevent this by introducing upper limit.
478 while ((mtag = m_tag_locate(m, MTAG_GIF, 0, mtag)) != NULL) {
479 if (*(struct ifnet **)(mtag + 1) == ifp) {
480 log(LOG_NOTICE, "%s: loop detected\n", if_name(ifp));
485 if (count > V_max_gif_nesting) {
487 "%s: if_output recursively called too many times(%d)\n",
488 if_name(ifp), count);
491 mtag = m_tag_alloc(MTAG_GIF, 0, sizeof(struct ifnet *), M_NOWAIT);
494 *(struct ifnet **)(mtag + 1) = ifp;
495 m_tag_prepend(m, mtag);
500 gif_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
505 if (dst->sa_family == AF_UNSPEC)
506 bcopy(dst->sa_data, &af, sizeof(af));
510 * Now save the af in the inbound pkt csum data, this is a cheat since
511 * we are using the inbound csum_data field to carry the af over to
512 * the gif_transmit() routine, avoiding using yet another mtag.
514 m->m_pkthdr.csum_data = af;
515 return (ifp->if_transmit(ifp, m));
519 gif_input(struct mbuf *m, struct ifnet *ifp, int proto, uint8_t ecn)
521 struct etherip_header *eip;
529 struct gif_softc *sc;
530 struct ether_header *eh;
531 struct ifnet *oldifp;
532 uint32_t gif_options;
541 gif_options = sc->gif_options;
542 m->m_pkthdr.rcvif = ifp;
548 if (m->m_len < sizeof(struct ip))
549 m = m_pullup(m, sizeof(struct ip));
552 ip = mtod(m, struct ip *);
553 if (ip_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
554 ECN_NOCARE, &ecn, &ip->ip_tos) == 0) {
563 if (m->m_len < sizeof(struct ip6_hdr))
564 m = m_pullup(m, sizeof(struct ip6_hdr));
567 t = htonl((uint32_t)ecn << 20);
568 ip6 = mtod(m, struct ip6_hdr *);
569 if (ip6_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
570 ECN_NOCARE, &t, &ip6->ip6_flow) == 0) {
576 case IPPROTO_ETHERIP:
585 mac_ifnet_create_mbuf(ifp, m);
588 if (bpf_peers_present(ifp->if_bpf)) {
590 bpf_mtap2(ifp->if_bpf, &af1, sizeof(af1), m);
593 if ((ifp->if_flags & IFF_MONITOR) != 0) {
594 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
595 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
600 if (ng_gif_input_p != NULL) {
601 (*ng_gif_input_p)(ifp, &m, af);
607 * Put the packet to the network layer input queue according to the
608 * specified address family.
609 * Note: older versions of gif_input directly called network layer
610 * input functions, e.g. ip6_input, here. We changed the policy to
611 * prevent too many recursive calls of such input functions, which
612 * might cause kernel panic. But the change may introduce another
613 * problem; if the input queue is full, packets are discarded.
614 * The kernel stack overflow really happened, and we believed
615 * queue-full rarely occurs, so we changed the policy.
629 n = sizeof(struct etherip_header) + sizeof(struct ether_header);
634 eip = mtod(m, struct etherip_header *);
635 if (eip->eip_ver != ETHERIP_VERSION) {
636 /* discard unknown versions */
640 m_adj(m, sizeof(struct etherip_header));
642 m->m_flags &= ~(M_BCAST|M_MCAST);
643 m->m_pkthdr.rcvif = ifp;
645 if (ifp->if_bridge) {
647 eh = mtod(m, struct ether_header *);
648 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
649 if (ETHER_IS_BROADCAST(eh->ether_dhost))
650 m->m_flags |= M_BCAST;
652 m->m_flags |= M_MCAST;
653 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
655 BRIDGE_INPUT(ifp, m);
657 if (m != NULL && ifp != oldifp) {
659 * The bridge gave us back itself or one of the
660 * members for which the frame is addressed.
671 if (ng_gif_input_orphan_p != NULL)
672 (*ng_gif_input_orphan_p)(ifp, m, af);
678 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
679 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
680 M_SETFIB(m, ifp->if_fib);
681 netisr_dispatch(isr, m);
684 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
687 /* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */
689 gif_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
692 struct ifreq *ifr = (struct ifreq*)data;
693 struct sockaddr *dst, *src;
694 struct gif_softc *sc;
696 struct sockaddr_in *sin = NULL;
699 struct sockaddr_in6 *sin6 = NULL;
706 ifp->if_flags |= IFF_UP;
713 if (ifr->ifr_mtu < GIF_MTU_MIN ||
714 ifr->ifr_mtu > GIF_MTU_MAX)
717 ifp->if_mtu = ifr->ifr_mtu;
720 sx_xlock(&gif_ioctl_sx);
730 case SIOCSIFPHYADDR_IN6:
736 src = (struct sockaddr *)
737 &(((struct in_aliasreq *)data)->ifra_addr);
738 dst = (struct sockaddr *)
739 &(((struct in_aliasreq *)data)->ifra_dstaddr);
743 case SIOCSIFPHYADDR_IN6:
744 src = (struct sockaddr *)
745 &(((struct in6_aliasreq *)data)->ifra_addr);
746 dst = (struct sockaddr *)
747 &(((struct in6_aliasreq *)data)->ifra_dstaddr);
753 /* sa_family must be equal */
754 if (src->sa_family != dst->sa_family ||
755 src->sa_len != dst->sa_len)
758 /* validate sa_len */
759 /* check sa_family looks sane for the cmd */
760 switch (src->sa_family) {
763 if (src->sa_len != sizeof(struct sockaddr_in))
765 if (cmd != SIOCSIFPHYADDR) {
766 error = EAFNOSUPPORT;
769 if (satosin(src)->sin_addr.s_addr == INADDR_ANY ||
770 satosin(dst)->sin_addr.s_addr == INADDR_ANY) {
771 error = EADDRNOTAVAIL;
778 if (src->sa_len != sizeof(struct sockaddr_in6))
780 if (cmd != SIOCSIFPHYADDR_IN6) {
781 error = EAFNOSUPPORT;
784 error = EADDRNOTAVAIL;
785 if (IN6_IS_ADDR_UNSPECIFIED(&satosin6(src)->sin6_addr)
787 IN6_IS_ADDR_UNSPECIFIED(&satosin6(dst)->sin6_addr))
790 * Check validity of the scope zone ID of the
791 * addresses, and convert it into the kernel
792 * internal form if necessary.
794 error = sa6_embedscope(satosin6(src), 0);
797 error = sa6_embedscope(satosin6(dst), 0);
803 error = EAFNOSUPPORT;
806 error = gif_set_tunnel(ifp, src, dst);
809 gif_delete_tunnel(ifp);
811 case SIOCGIFPSRCADDR:
812 case SIOCGIFPDSTADDR:
814 case SIOCGIFPSRCADDR_IN6:
815 case SIOCGIFPDSTADDR_IN6:
817 if (sc->gif_family == 0) {
818 error = EADDRNOTAVAIL;
824 case SIOCGIFPSRCADDR:
825 case SIOCGIFPDSTADDR:
826 if (sc->gif_family != AF_INET) {
827 error = EADDRNOTAVAIL;
830 sin = (struct sockaddr_in *)&ifr->ifr_addr;
831 memset(sin, 0, sizeof(*sin));
832 sin->sin_family = AF_INET;
833 sin->sin_len = sizeof(*sin);
837 case SIOCGIFPSRCADDR_IN6:
838 case SIOCGIFPDSTADDR_IN6:
839 if (sc->gif_family != AF_INET6) {
840 error = EADDRNOTAVAIL;
843 sin6 = (struct sockaddr_in6 *)
844 &(((struct in6_ifreq *)data)->ifr_addr);
845 memset(sin6, 0, sizeof(*sin6));
846 sin6->sin6_family = AF_INET6;
847 sin6->sin6_len = sizeof(*sin6);
851 error = EAFNOSUPPORT;
856 case SIOCGIFPSRCADDR:
857 sin->sin_addr = sc->gif_iphdr->ip_src;
859 case SIOCGIFPDSTADDR:
860 sin->sin_addr = sc->gif_iphdr->ip_dst;
864 case SIOCGIFPSRCADDR_IN6:
865 sin6->sin6_addr = sc->gif_ip6hdr->ip6_src;
867 case SIOCGIFPDSTADDR_IN6:
868 sin6->sin6_addr = sc->gif_ip6hdr->ip6_dst;
878 case SIOCGIFPSRCADDR:
879 case SIOCGIFPDSTADDR:
880 error = prison_if(curthread->td_ucred,
881 (struct sockaddr *)sin);
883 memset(sin, 0, sizeof(*sin));
887 case SIOCGIFPSRCADDR_IN6:
888 case SIOCGIFPDSTADDR_IN6:
889 error = prison_if(curthread->td_ucred,
890 (struct sockaddr *)sin6);
892 error = sa6_recoverscope(sin6);
894 memset(sin6, 0, sizeof(*sin6));
899 ifr->ifr_fib = sc->gif_fibnum;
902 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
904 if (ifr->ifr_fib >= rt_numfibs)
907 sc->gif_fibnum = ifr->ifr_fib;
910 options = sc->gif_options;
911 error = copyout(&options, ifr->ifr_data, sizeof(options));
914 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
916 error = copyin(ifr->ifr_data, &options, sizeof(options));
919 if (options & ~GIF_OPTMASK)
922 sc->gif_options = options;
929 sx_xunlock(&gif_ioctl_sx);
934 gif_detach(struct gif_softc *sc)
937 sx_assert(&gif_ioctl_sx, SA_XLOCKED);
938 if (sc->gif_ecookie != NULL)
939 encap_detach(sc->gif_ecookie);
940 sc->gif_ecookie = NULL;
944 gif_attach(struct gif_softc *sc, int af)
947 sx_assert(&gif_ioctl_sx, SA_XLOCKED);
951 return (in_gif_attach(sc));
955 return (in6_gif_attach(sc));
958 return (EAFNOSUPPORT);
962 gif_set_tunnel(struct ifnet *ifp, struct sockaddr *src, struct sockaddr *dst)
964 struct gif_softc *sc = ifp->if_softc;
965 struct gif_softc *tsc;
977 /* Disallow parallel tunnels unless instructed otherwise. */
978 if (V_parallel_tunnels == 0) {
980 LIST_FOREACH(tsc, &V_gif_softc_list, gif_list) {
981 if (tsc == sc || tsc->gif_family != src->sa_family)
984 if (tsc->gif_family == AF_INET &&
985 tsc->gif_iphdr->ip_src.s_addr ==
986 satosin(src)->sin_addr.s_addr &&
987 tsc->gif_iphdr->ip_dst.s_addr ==
988 satosin(dst)->sin_addr.s_addr) {
989 error = EADDRNOTAVAIL;
995 if (tsc->gif_family == AF_INET6 &&
996 IN6_ARE_ADDR_EQUAL(&tsc->gif_ip6hdr->ip6_src,
997 &satosin6(src)->sin6_addr) &&
998 IN6_ARE_ADDR_EQUAL(&tsc->gif_ip6hdr->ip6_dst,
999 &satosin6(dst)->sin6_addr)) {
1000 error = EADDRNOTAVAIL;
1008 switch (src->sa_family) {
1011 hdr = ip = malloc(sizeof(struct ip), M_GIF,
1013 ip->ip_src.s_addr = satosin(src)->sin_addr.s_addr;
1014 ip->ip_dst.s_addr = satosin(dst)->sin_addr.s_addr;
1019 hdr = ip6 = malloc(sizeof(struct ip6_hdr), M_GIF,
1021 ip6->ip6_src = satosin6(src)->sin6_addr;
1022 ip6->ip6_dst = satosin6(dst)->sin6_addr;
1023 ip6->ip6_vfc = IPV6_VERSION;
1027 return (EAFNOSUPPORT);
1030 if (sc->gif_family != src->sa_family)
1032 if (sc->gif_family == 0 ||
1033 sc->gif_family != src->sa_family)
1034 error = gif_attach(sc, src->sa_family);
1037 if (sc->gif_family != 0)
1038 free(sc->gif_hdr, M_GIF);
1039 sc->gif_family = src->sa_family;
1042 #if defined(INET) || defined(INET6)
1045 if (error == 0 && sc->gif_family != 0) {
1046 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1047 if_link_state_change(ifp, LINK_STATE_UP);
1049 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1050 if_link_state_change(ifp, LINK_STATE_DOWN);
1056 gif_delete_tunnel(struct ifnet *ifp)
1058 struct gif_softc *sc = ifp->if_softc;
1065 family = sc->gif_family;
1070 free(sc->gif_hdr, M_GIF);
1072 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1073 if_link_state_change(ifp, LINK_STATE_DOWN);