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_VNET_INT(_net_link_gif, OID_AUTO, max_nesting, 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_VNET_INT(_net_link_gif, OID_AUTO, parallel_tunnels, CTLFLAG_RW,
166 &VNET_NAME(parallel_tunnels), 0, "Allow parallel tunnels?");
168 /* copy from src/sys/net/if_ethersubr.c */
169 static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] =
170 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
171 #ifndef ETHER_IS_BROADCAST
172 #define ETHER_IS_BROADCAST(addr) \
173 (bcmp(etherbroadcastaddr, (addr), ETHER_ADDR_LEN) == 0)
177 gif_clone_create(struct if_clone *ifc, int unit, caddr_t params)
179 struct gif_softc *sc;
181 sc = malloc(sizeof(struct gif_softc), M_GIF, M_WAITOK | M_ZERO);
182 sc->gif_fibnum = curthread->td_proc->p_fibnum;
183 GIF2IFP(sc) = if_alloc(IFT_GIF);
185 GIF2IFP(sc)->if_softc = sc;
186 if_initname(GIF2IFP(sc), gifname, unit);
188 GIF2IFP(sc)->if_addrlen = 0;
189 GIF2IFP(sc)->if_mtu = GIF_MTU;
190 GIF2IFP(sc)->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
192 /* turn off ingress filter */
193 GIF2IFP(sc)->if_flags |= IFF_LINK2;
195 GIF2IFP(sc)->if_ioctl = gif_ioctl;
196 GIF2IFP(sc)->if_transmit = gif_transmit;
197 GIF2IFP(sc)->if_qflush = gif_qflush;
198 GIF2IFP(sc)->if_output = gif_output;
199 GIF2IFP(sc)->if_capabilities |= IFCAP_LINKSTATE;
200 GIF2IFP(sc)->if_capenable |= IFCAP_LINKSTATE;
201 if_attach(GIF2IFP(sc));
202 bpfattach(GIF2IFP(sc), DLT_NULL, sizeof(u_int32_t));
203 if (ng_gif_attach_p != NULL)
204 (*ng_gif_attach_p)(GIF2IFP(sc));
207 LIST_INSERT_HEAD(&V_gif_softc_list, sc, gif_list);
213 gif_clone_destroy(struct ifnet *ifp)
215 struct gif_softc *sc;
217 sx_xlock(&gif_ioctl_sx);
219 gif_delete_tunnel(ifp);
221 LIST_REMOVE(sc, gif_list);
223 if (ng_gif_detach_p != NULL)
224 (*ng_gif_detach_p)(ifp);
227 ifp->if_softc = NULL;
228 sx_xunlock(&gif_ioctl_sx);
231 GIF_LOCK_DESTROY(sc);
236 vnet_gif_init(const void *unused __unused)
239 LIST_INIT(&V_gif_softc_list);
240 GIF_LIST_LOCK_INIT();
241 V_gif_cloner = if_clone_simple(gifname, gif_clone_create,
242 gif_clone_destroy, 0);
244 VNET_SYSINIT(vnet_gif_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
245 vnet_gif_init, NULL);
248 vnet_gif_uninit(const void *unused __unused)
251 if_clone_detach(V_gif_cloner);
252 GIF_LIST_LOCK_DESTROY();
254 VNET_SYSUNINIT(vnet_gif_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
255 vnet_gif_uninit, NULL);
258 gifmodevent(module_t mod, int type, void *data)
271 static moduledata_t gif_mod = {
277 DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
278 MODULE_VERSION(if_gif, 1);
281 gif_encapcheck(const struct mbuf *m, int off, int proto, void *arg)
284 struct gif_softc *sc;
288 sc = (struct gif_softc *)arg;
289 if (sc == NULL || (GIF2IFP(sc)->if_flags & IFF_UP) == 0)
295 /* no physical address */
296 if (sc->gif_family == 0)
306 case IPPROTO_ETHERIP:
312 /* Bail on short packets */
313 if (m->m_pkthdr.len < sizeof(struct ip))
316 m_copydata(m, 0, 1, &ver);
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 eth->eip_ver = ETHERIP_VERSION;
428 error = EAFNOSUPPORT;
432 /* XXX should we check if our outer source is legal? */
433 /* dispatch to output logic based on outer AF */
434 switch (sc->gif_family) {
437 error = in_gif_output(ifp, m, proto, ecn);
442 error = in6_gif_output(ifp, m, proto, ecn);
450 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
455 gif_qflush(struct ifnet *ifp __unused)
460 #define MTAG_GIF 1080679712
462 gif_check_nesting(struct ifnet *ifp, struct mbuf *m)
468 * gif may cause infinite recursion calls when misconfigured.
469 * We'll prevent this by detecting loops.
471 * High nesting level may cause stack exhaustion.
472 * We'll prevent this by introducing upper limit.
476 while ((mtag = m_tag_locate(m, MTAG_GIF, 0, mtag)) != NULL) {
477 if (*(struct ifnet **)(mtag + 1) == ifp) {
478 log(LOG_NOTICE, "%s: loop detected\n", ifp->if_xname);
483 if (count > V_max_gif_nesting) {
485 "%s: if_output recursively called too many times(%d)\n",
486 if_name(ifp), count);
489 mtag = m_tag_alloc(MTAG_GIF, 0, sizeof(struct ifnet *), M_NOWAIT);
492 *(struct ifnet **)(mtag + 1) = ifp;
493 m_tag_prepend(m, mtag);
498 gif_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
503 if (dst->sa_family == AF_UNSPEC)
504 bcopy(dst->sa_data, &af, sizeof(af));
508 * Now save the af in the inbound pkt csum data, this is a cheat since
509 * we are using the inbound csum_data field to carry the af over to
510 * the gif_transmit() routine, avoiding using yet another mtag.
512 m->m_pkthdr.csum_data = af;
513 return (ifp->if_transmit(ifp, m));
517 gif_input(struct mbuf *m, struct ifnet *ifp, int proto, uint8_t ecn)
519 struct etherip_header *eip;
527 struct gif_softc *sc;
528 struct ether_header *eh;
529 struct ifnet *oldifp;
538 m->m_pkthdr.rcvif = ifp;
544 if (m->m_len < sizeof(struct ip))
545 m = m_pullup(m, sizeof(struct ip));
548 ip = mtod(m, struct ip *);
549 if (ip_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
550 ECN_NOCARE, &ecn, &ip->ip_tos) == 0) {
559 if (m->m_len < sizeof(struct ip6_hdr))
560 m = m_pullup(m, sizeof(struct ip6_hdr));
563 t = htonl((uint32_t)ecn << 20);
564 ip6 = mtod(m, struct ip6_hdr *);
565 if (ip6_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
566 ECN_NOCARE, &t, &ip6->ip6_flow) == 0) {
572 case IPPROTO_ETHERIP:
581 mac_ifnet_create_mbuf(ifp, m);
584 if (bpf_peers_present(ifp->if_bpf)) {
586 bpf_mtap2(ifp->if_bpf, &af1, sizeof(af1), m);
589 if ((ifp->if_flags & IFF_MONITOR) != 0) {
590 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
591 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
596 if (ng_gif_input_p != NULL) {
597 (*ng_gif_input_p)(ifp, &m, af);
603 * Put the packet to the network layer input queue according to the
604 * specified address family.
605 * Note: older versions of gif_input directly called network layer
606 * input functions, e.g. ip6_input, here. We changed the policy to
607 * prevent too many recursive calls of such input functions, which
608 * might cause kernel panic. But the change may introduce another
609 * problem; if the input queue is full, packets are discarded.
610 * The kernel stack overflow really happened, and we believed
611 * queue-full rarely occurs, so we changed the policy.
625 n = sizeof(struct etherip_header) + sizeof(struct ether_header);
630 eip = mtod(m, struct etherip_header *);
631 if (eip->eip_ver != ETHERIP_VERSION) {
632 /* discard unknown versions */
636 m_adj(m, sizeof(struct etherip_header));
638 m->m_flags &= ~(M_BCAST|M_MCAST);
639 m->m_pkthdr.rcvif = ifp;
641 if (ifp->if_bridge) {
643 eh = mtod(m, struct ether_header *);
644 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
645 if (ETHER_IS_BROADCAST(eh->ether_dhost))
646 m->m_flags |= M_BCAST;
648 m->m_flags |= M_MCAST;
649 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
651 BRIDGE_INPUT(ifp, m);
653 if (m != NULL && ifp != oldifp) {
655 * The bridge gave us back itself or one of the
656 * members for which the frame is addressed.
667 if (ng_gif_input_orphan_p != NULL)
668 (*ng_gif_input_orphan_p)(ifp, m, af);
674 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
675 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
676 M_SETFIB(m, ifp->if_fib);
677 netisr_dispatch(isr, m);
680 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
683 /* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */
685 gif_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
688 struct ifreq *ifr = (struct ifreq*)data;
689 struct sockaddr *dst, *src;
690 struct gif_softc *sc;
692 struct sockaddr_in *sin = NULL;
695 struct sockaddr_in6 *sin6 = NULL;
702 ifp->if_flags |= IFF_UP;
709 if (ifr->ifr_mtu < GIF_MTU_MIN ||
710 ifr->ifr_mtu > GIF_MTU_MAX)
713 ifp->if_mtu = ifr->ifr_mtu;
716 sx_xlock(&gif_ioctl_sx);
726 case SIOCSIFPHYADDR_IN6:
732 src = (struct sockaddr *)
733 &(((struct in_aliasreq *)data)->ifra_addr);
734 dst = (struct sockaddr *)
735 &(((struct in_aliasreq *)data)->ifra_dstaddr);
739 case SIOCSIFPHYADDR_IN6:
740 src = (struct sockaddr *)
741 &(((struct in6_aliasreq *)data)->ifra_addr);
742 dst = (struct sockaddr *)
743 &(((struct in6_aliasreq *)data)->ifra_dstaddr);
749 /* sa_family must be equal */
750 if (src->sa_family != dst->sa_family ||
751 src->sa_len != dst->sa_len)
754 /* validate sa_len */
755 /* check sa_family looks sane for the cmd */
756 switch (src->sa_family) {
759 if (src->sa_len != sizeof(struct sockaddr_in))
761 if (cmd != SIOCSIFPHYADDR) {
762 error = EAFNOSUPPORT;
765 if (satosin(src)->sin_addr.s_addr == INADDR_ANY ||
766 satosin(dst)->sin_addr.s_addr == INADDR_ANY) {
767 error = EADDRNOTAVAIL;
774 if (src->sa_len != sizeof(struct sockaddr_in6))
776 if (cmd != SIOCSIFPHYADDR_IN6) {
777 error = EAFNOSUPPORT;
780 error = EADDRNOTAVAIL;
781 if (IN6_IS_ADDR_UNSPECIFIED(&satosin6(src)->sin6_addr)
783 IN6_IS_ADDR_UNSPECIFIED(&satosin6(dst)->sin6_addr))
786 * Check validity of the scope zone ID of the
787 * addresses, and convert it into the kernel
788 * internal form if necessary.
790 error = sa6_embedscope(satosin6(src), 0);
793 error = sa6_embedscope(satosin6(dst), 0);
799 error = EAFNOSUPPORT;
802 error = gif_set_tunnel(ifp, src, dst);
805 gif_delete_tunnel(ifp);
807 case SIOCGIFPSRCADDR:
808 case SIOCGIFPDSTADDR:
810 case SIOCGIFPSRCADDR_IN6:
811 case SIOCGIFPDSTADDR_IN6:
813 if (sc->gif_family == 0) {
814 error = EADDRNOTAVAIL;
820 case SIOCGIFPSRCADDR:
821 case SIOCGIFPDSTADDR:
822 if (sc->gif_family != AF_INET) {
823 error = EADDRNOTAVAIL;
826 sin = (struct sockaddr_in *)&ifr->ifr_addr;
827 memset(sin, 0, sizeof(*sin));
828 sin->sin_family = AF_INET;
829 sin->sin_len = sizeof(*sin);
833 case SIOCGIFPSRCADDR_IN6:
834 case SIOCGIFPDSTADDR_IN6:
835 if (sc->gif_family != AF_INET6) {
836 error = EADDRNOTAVAIL;
839 sin6 = (struct sockaddr_in6 *)
840 &(((struct in6_ifreq *)data)->ifr_addr);
841 memset(sin6, 0, sizeof(*sin6));
842 sin6->sin6_family = AF_INET6;
843 sin6->sin6_len = sizeof(*sin6);
847 error = EAFNOSUPPORT;
852 case SIOCGIFPSRCADDR:
853 sin->sin_addr = sc->gif_iphdr->ip_src;
855 case SIOCGIFPDSTADDR:
856 sin->sin_addr = sc->gif_iphdr->ip_dst;
860 case SIOCGIFPSRCADDR_IN6:
861 sin6->sin6_addr = sc->gif_ip6hdr->ip6_src;
863 case SIOCGIFPDSTADDR_IN6:
864 sin6->sin6_addr = sc->gif_ip6hdr->ip6_dst;
874 case SIOCGIFPSRCADDR:
875 case SIOCGIFPDSTADDR:
876 error = prison_if(curthread->td_ucred,
877 (struct sockaddr *)sin);
879 memset(sin, 0, sizeof(*sin));
883 case SIOCGIFPSRCADDR_IN6:
884 case SIOCGIFPDSTADDR_IN6:
885 error = prison_if(curthread->td_ucred,
886 (struct sockaddr *)sin6);
888 error = sa6_recoverscope(sin6);
890 memset(sin6, 0, sizeof(*sin6));
895 ifr->ifr_fib = sc->gif_fibnum;
898 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
900 if (ifr->ifr_fib >= rt_numfibs)
903 sc->gif_fibnum = ifr->ifr_fib;
906 options = sc->gif_options;
907 error = copyout(&options, ifr->ifr_data, sizeof(options));
910 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
912 error = copyin(ifr->ifr_data, &options, sizeof(options));
915 if (options & ~GIF_OPTMASK)
918 sc->gif_options = options;
925 sx_xunlock(&gif_ioctl_sx);
930 gif_detach(struct gif_softc *sc)
933 sx_assert(&gif_ioctl_sx, SA_XLOCKED);
934 if (sc->gif_ecookie != NULL)
935 encap_detach(sc->gif_ecookie);
936 sc->gif_ecookie = NULL;
940 gif_attach(struct gif_softc *sc, int af)
943 sx_assert(&gif_ioctl_sx, SA_XLOCKED);
947 return (in_gif_attach(sc));
951 return (in6_gif_attach(sc));
954 return (EAFNOSUPPORT);
958 gif_set_tunnel(struct ifnet *ifp, struct sockaddr *src, struct sockaddr *dst)
960 struct gif_softc *sc = ifp->if_softc;
961 struct gif_softc *tsc;
973 /* Disallow parallel tunnels unless instructed otherwise. */
974 if (V_parallel_tunnels == 0) {
976 LIST_FOREACH(tsc, &V_gif_softc_list, gif_list) {
977 if (tsc == sc || tsc->gif_family != src->sa_family)
980 if (tsc->gif_family == AF_INET &&
981 tsc->gif_iphdr->ip_src.s_addr ==
982 satosin(src)->sin_addr.s_addr &&
983 tsc->gif_iphdr->ip_dst.s_addr ==
984 satosin(dst)->sin_addr.s_addr) {
985 error = EADDRNOTAVAIL;
991 if (tsc->gif_family == AF_INET6 &&
992 IN6_ARE_ADDR_EQUAL(&tsc->gif_ip6hdr->ip6_src,
993 &satosin6(src)->sin6_addr) &&
994 IN6_ARE_ADDR_EQUAL(&tsc->gif_ip6hdr->ip6_dst,
995 &satosin6(dst)->sin6_addr)) {
996 error = EADDRNOTAVAIL;
1004 switch (src->sa_family) {
1007 hdr = ip = malloc(sizeof(struct ip), M_GIF,
1009 ip->ip_src.s_addr = satosin(src)->sin_addr.s_addr;
1010 ip->ip_dst.s_addr = satosin(dst)->sin_addr.s_addr;
1015 hdr = ip6 = malloc(sizeof(struct ip6_hdr), M_GIF,
1017 ip6->ip6_src = satosin6(src)->sin6_addr;
1018 ip6->ip6_dst = satosin6(dst)->sin6_addr;
1019 ip6->ip6_vfc = IPV6_VERSION;
1023 return (EAFNOSUPPORT);
1026 if (sc->gif_family != src->sa_family)
1028 if (sc->gif_family == 0 ||
1029 sc->gif_family != src->sa_family)
1030 error = gif_attach(sc, src->sa_family);
1033 if (sc->gif_family != 0)
1034 free(sc->gif_hdr, M_GIF);
1035 sc->gif_family = src->sa_family;
1038 #if defined(INET) || defined(INET6)
1041 if (error == 0 && sc->gif_family != 0) {
1042 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1043 if_link_state_change(ifp, LINK_STATE_UP);
1045 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1046 if_link_state_change(ifp, LINK_STATE_DOWN);
1052 gif_delete_tunnel(struct ifnet *ifp)
1054 struct gif_softc *sc = ifp->if_softc;
1061 family = sc->gif_family;
1066 free(sc->gif_hdr, M_GIF);
1068 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1069 if_link_state_change(ifp, LINK_STATE_DOWN);