1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Copyright (c) 2018 Andrey V. Elsukov <ae@FreeBSD.org>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $KAME: if_gif.c,v 1.87 2001/10/19 08:50:27 itojun Exp $
33 */
34
35 #include <sys/cdefs.h>
36 #include "opt_inet.h"
37 #include "opt_inet6.h"
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/kernel.h>
42 #include <sys/lock.h>
43 #include <sys/malloc.h>
44 #include <sys/mbuf.h>
45 #include <sys/module.h>
46 #include <sys/rmlock.h>
47 #include <sys/socket.h>
48 #include <sys/sockio.h>
49 #include <sys/sx.h>
50 #include <sys/errno.h>
51 #include <sys/time.h>
52 #include <sys/sysctl.h>
53 #include <sys/syslog.h>
54 #include <sys/priv.h>
55 #include <sys/proc.h>
56 #include <sys/conf.h>
57 #include <machine/cpu.h>
58
59 #include <net/if.h>
60 #include <net/if_var.h>
61 #include <net/if_private.h>
62 #include <net/if_clone.h>
63 #include <net/if_types.h>
64 #include <net/netisr.h>
65 #include <net/route.h>
66 #include <net/bpf.h>
67 #include <net/vnet.h>
68
69 #include <netinet/in.h>
70 #include <netinet/in_systm.h>
71 #include <netinet/ip.h>
72 #include <netinet/ip_ecn.h>
73 #ifdef INET
74 #include <netinet/in_var.h>
75 #include <netinet/ip_var.h>
76 #endif /* INET */
77
78 #ifdef INET6
79 #ifndef INET
80 #include <netinet/in.h>
81 #endif
82 #include <netinet6/in6_var.h>
83 #include <netinet/ip6.h>
84 #include <netinet6/ip6_ecn.h>
85 #include <netinet6/ip6_var.h>
86 #endif /* INET6 */
87
88 #include <netinet/ip_encap.h>
89 #include <net/ethernet.h>
90 #include <net/if_bridgevar.h>
91 #include <net/if_gif.h>
92
93 #include <security/mac/mac_framework.h>
94
95 static const char gifname[] = "gif";
96
97 MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface");
98 static struct sx gif_ioctl_sx;
99 SX_SYSINIT(gif_ioctl_sx, &gif_ioctl_sx, "gif_ioctl");
100
101 void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, int af);
102 void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, int af);
103 void (*ng_gif_attach_p)(struct ifnet *ifp);
104 void (*ng_gif_detach_p)(struct ifnet *ifp);
105
106 #ifdef VIMAGE
107 static void gif_reassign(struct ifnet *, struct vnet *, char *);
108 #endif
109 static void gif_delete_tunnel(struct gif_softc *);
110 static int gif_ioctl(struct ifnet *, u_long, caddr_t);
111 static int gif_transmit(struct ifnet *, struct mbuf *);
112 static void gif_qflush(struct ifnet *);
113 static int gif_clone_create(struct if_clone *, int, caddr_t);
114 static void gif_clone_destroy(struct ifnet *);
115 VNET_DEFINE_STATIC(struct if_clone *, gif_cloner);
116 #define V_gif_cloner VNET(gif_cloner)
117
118 SYSCTL_DECL(_net_link);
119 static SYSCTL_NODE(_net_link, IFT_GIF, gif, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
120 "Generic Tunnel Interface");
121 #ifndef MAX_GIF_NEST
122 /*
123 * This macro controls the default upper limitation on nesting of gif tunnels.
124 * Since, setting a large value to this macro with a careless configuration
125 * may introduce system crash, we don't allow any nestings by default.
126 * If you need to configure nested gif tunnels, you can define this macro
127 * in your kernel configuration file. However, if you do so, please be
128 * careful to configure the tunnels so that it won't make a loop.
129 */
130 #define MAX_GIF_NEST 1
131 #endif
132 VNET_DEFINE_STATIC(int, max_gif_nesting) = MAX_GIF_NEST;
133 #define V_max_gif_nesting VNET(max_gif_nesting)
134 SYSCTL_INT(_net_link_gif, OID_AUTO, max_nesting, CTLFLAG_VNET | CTLFLAG_RW,
135 &VNET_NAME(max_gif_nesting), 0, "Max nested tunnels");
136
137 static int
gif_clone_create(struct if_clone * ifc,int unit,caddr_t params)138 gif_clone_create(struct if_clone *ifc, int unit, caddr_t params)
139 {
140 struct gif_softc *sc;
141
142 sc = malloc(sizeof(struct gif_softc), M_GIF, M_WAITOK | M_ZERO);
143 sc->gif_fibnum = curthread->td_proc->p_fibnum;
144 GIF2IFP(sc) = if_alloc(IFT_GIF);
145 GIF2IFP(sc)->if_softc = sc;
146 if_initname(GIF2IFP(sc), gifname, unit);
147
148 GIF2IFP(sc)->if_addrlen = 0;
149 GIF2IFP(sc)->if_mtu = GIF_MTU;
150 GIF2IFP(sc)->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
151 GIF2IFP(sc)->if_ioctl = gif_ioctl;
152 GIF2IFP(sc)->if_transmit = gif_transmit;
153 GIF2IFP(sc)->if_qflush = gif_qflush;
154 GIF2IFP(sc)->if_output = gif_output;
155 #ifdef VIMAGE
156 GIF2IFP(sc)->if_reassign = gif_reassign;
157 #endif
158 GIF2IFP(sc)->if_capabilities |= IFCAP_LINKSTATE;
159 GIF2IFP(sc)->if_capenable |= IFCAP_LINKSTATE;
160 if_attach(GIF2IFP(sc));
161 bpfattach(GIF2IFP(sc), DLT_NULL, sizeof(u_int32_t));
162 if (ng_gif_attach_p != NULL)
163 (*ng_gif_attach_p)(GIF2IFP(sc));
164
165 return (0);
166 }
167
168 #ifdef VIMAGE
169 static void
gif_reassign(struct ifnet * ifp,struct vnet * new_vnet __unused,char * unused __unused)170 gif_reassign(struct ifnet *ifp, struct vnet *new_vnet __unused,
171 char *unused __unused)
172 {
173 struct gif_softc *sc;
174
175 sx_xlock(&gif_ioctl_sx);
176 sc = ifp->if_softc;
177 if (sc != NULL)
178 gif_delete_tunnel(sc);
179 sx_xunlock(&gif_ioctl_sx);
180 }
181 #endif /* VIMAGE */
182
183 static void
gif_clone_destroy(struct ifnet * ifp)184 gif_clone_destroy(struct ifnet *ifp)
185 {
186 struct gif_softc *sc;
187
188 sx_xlock(&gif_ioctl_sx);
189 sc = ifp->if_softc;
190 gif_delete_tunnel(sc);
191 if (ng_gif_detach_p != NULL)
192 (*ng_gif_detach_p)(ifp);
193 bpfdetach(ifp);
194 if_detach(ifp);
195 ifp->if_softc = NULL;
196 sx_xunlock(&gif_ioctl_sx);
197
198 GIF_WAIT();
199 if_free(ifp);
200 free(sc, M_GIF);
201 }
202
203 static void
vnet_gif_init(const void * unused __unused)204 vnet_gif_init(const void *unused __unused)
205 {
206
207 V_gif_cloner = if_clone_simple(gifname, gif_clone_create,
208 gif_clone_destroy, 0);
209 #ifdef INET
210 in_gif_init();
211 #endif
212 #ifdef INET6
213 in6_gif_init();
214 #endif
215 }
216 VNET_SYSINIT(vnet_gif_init, SI_SUB_PSEUDO, SI_ORDER_ANY,
217 vnet_gif_init, NULL);
218
219 static void
vnet_gif_uninit(const void * unused __unused)220 vnet_gif_uninit(const void *unused __unused)
221 {
222
223 if_clone_detach(V_gif_cloner);
224 #ifdef INET
225 in_gif_uninit();
226 #endif
227 #ifdef INET6
228 in6_gif_uninit();
229 #endif
230 }
231 VNET_SYSUNINIT(vnet_gif_uninit, SI_SUB_PSEUDO, SI_ORDER_ANY,
232 vnet_gif_uninit, NULL);
233
234 static int
gifmodevent(module_t mod,int type,void * data)235 gifmodevent(module_t mod, int type, void *data)
236 {
237
238 switch (type) {
239 case MOD_LOAD:
240 case MOD_UNLOAD:
241 break;
242 default:
243 return (EOPNOTSUPP);
244 }
245 return (0);
246 }
247
248 static moduledata_t gif_mod = {
249 "if_gif",
250 gifmodevent,
251 0
252 };
253
254 DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
255 MODULE_VERSION(if_gif, 1);
256
257 struct gif_list *
gif_hashinit(void)258 gif_hashinit(void)
259 {
260 struct gif_list *hash;
261 int i;
262
263 hash = malloc(sizeof(struct gif_list) * GIF_HASH_SIZE,
264 M_GIF, M_WAITOK);
265 for (i = 0; i < GIF_HASH_SIZE; i++)
266 CK_LIST_INIT(&hash[i]);
267
268 return (hash);
269 }
270
271 void
gif_hashdestroy(struct gif_list * hash)272 gif_hashdestroy(struct gif_list *hash)
273 {
274
275 free(hash, M_GIF);
276 }
277
278 #define MTAG_GIF 1080679712
279 static int
gif_transmit(struct ifnet * ifp,struct mbuf * m)280 gif_transmit(struct ifnet *ifp, struct mbuf *m)
281 {
282 struct gif_softc *sc;
283 struct etherip_header *eth;
284 #ifdef INET
285 struct ip *ip;
286 #endif
287 #ifdef INET6
288 struct ip6_hdr *ip6;
289 uint32_t t;
290 #endif
291 uint32_t af;
292 uint8_t proto, ecn;
293 int error;
294
295 NET_EPOCH_ASSERT();
296 #ifdef MAC
297 error = mac_ifnet_check_transmit(ifp, m);
298 if (error) {
299 m_freem(m);
300 goto err;
301 }
302 #endif
303 error = ENETDOWN;
304 sc = ifp->if_softc;
305 if ((ifp->if_flags & IFF_MONITOR) != 0 ||
306 (ifp->if_flags & IFF_UP) == 0 ||
307 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
308 sc->gif_family == 0 ||
309 (error = if_tunnel_check_nesting(ifp, m, MTAG_GIF,
310 V_max_gif_nesting)) != 0) {
311 m_freem(m);
312 goto err;
313 }
314 /* Now pull back the af that we stashed in the csum_data. */
315 af = m->m_pkthdr.csum_data;
316 m->m_flags &= ~(M_BCAST|M_MCAST);
317 M_SETFIB(m, sc->gif_fibnum);
318 BPF_MTAP2(ifp, &af, sizeof(af), m);
319 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
320 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
321 /* inner AF-specific encapsulation */
322 ecn = 0;
323 switch (af) {
324 #ifdef INET
325 case AF_INET:
326 proto = IPPROTO_IPV4;
327 if (m->m_len < sizeof(struct ip))
328 m = m_pullup(m, sizeof(struct ip));
329 if (m == NULL) {
330 error = ENOBUFS;
331 goto err;
332 }
333 ip = mtod(m, struct ip *);
334 ip_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
335 ECN_NOCARE, &ecn, &ip->ip_tos);
336 break;
337 #endif
338 #ifdef INET6
339 case AF_INET6:
340 proto = IPPROTO_IPV6;
341 if (m->m_len < sizeof(struct ip6_hdr))
342 m = m_pullup(m, sizeof(struct ip6_hdr));
343 if (m == NULL) {
344 error = ENOBUFS;
345 goto err;
346 }
347 t = 0;
348 ip6 = mtod(m, struct ip6_hdr *);
349 ip6_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
350 ECN_NOCARE, &t, &ip6->ip6_flow);
351 ecn = (ntohl(t) >> 20) & 0xff;
352 break;
353 #endif
354 case AF_LINK:
355 KASSERT(ifp->if_bridge != NULL,
356 ("%s: bridge not attached", __func__));
357 proto = IPPROTO_ETHERIP;
358 M_PREPEND(m, sizeof(struct etherip_header), M_NOWAIT);
359 if (m == NULL) {
360 error = ENOBUFS;
361 goto err;
362 }
363 eth = mtod(m, struct etherip_header *);
364 eth->eip_resvh = 0;
365 eth->eip_ver = ETHERIP_VERSION;
366 eth->eip_resvl = 0;
367 break;
368 default:
369 error = EAFNOSUPPORT;
370 m_freem(m);
371 goto err;
372 }
373 /* XXX should we check if our outer source is legal? */
374 /* dispatch to output logic based on outer AF */
375 switch (sc->gif_family) {
376 #ifdef INET
377 case AF_INET:
378 error = in_gif_output(ifp, m, proto, ecn);
379 break;
380 #endif
381 #ifdef INET6
382 case AF_INET6:
383 error = in6_gif_output(ifp, m, proto, ecn);
384 break;
385 #endif
386 default:
387 m_freem(m);
388 }
389 err:
390 if (error)
391 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
392 return (error);
393 }
394
395 static void
gif_qflush(struct ifnet * ifp __unused)396 gif_qflush(struct ifnet *ifp __unused)
397 {
398
399 }
400
401 int
gif_output(struct ifnet * ifp,struct mbuf * m,const struct sockaddr * dst,struct route * ro)402 gif_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
403 struct route *ro)
404 {
405 uint32_t af;
406
407 /* BPF writes need to be handled specially. */
408 if (dst->sa_family == AF_UNSPEC || dst->sa_family == pseudo_AF_HDRCMPLT)
409 memcpy(&af, dst->sa_data, sizeof(af));
410 else
411 af = RO_GET_FAMILY(ro, dst);
412 /*
413 * Now save the af in the inbound pkt csum data, this is a cheat since
414 * we are using the inbound csum_data field to carry the af over to
415 * the gif_transmit() routine, avoiding using yet another mtag.
416 */
417 m->m_pkthdr.csum_data = af;
418 return (ifp->if_transmit(ifp, m));
419 }
420
421 void
gif_input(struct mbuf * m,struct ifnet * ifp,int proto,uint8_t ecn)422 gif_input(struct mbuf *m, struct ifnet *ifp, int proto, uint8_t ecn)
423 {
424 struct etherip_header *eip;
425 #ifdef INET
426 struct ip *ip;
427 #endif
428 #ifdef INET6
429 struct ip6_hdr *ip6;
430 uint32_t t;
431 #endif
432 struct ether_header *eh;
433 struct ifnet *oldifp;
434 int isr, n, af;
435
436 NET_EPOCH_ASSERT();
437
438 if (ifp == NULL) {
439 /* just in case */
440 m_freem(m);
441 return;
442 }
443 m->m_pkthdr.rcvif = ifp;
444 m_clrprotoflags(m);
445 switch (proto) {
446 #ifdef INET
447 case IPPROTO_IPV4:
448 af = AF_INET;
449 if (m->m_len < sizeof(struct ip))
450 m = m_pullup(m, sizeof(struct ip));
451 if (m == NULL)
452 goto drop;
453 ip = mtod(m, struct ip *);
454 if (ip_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
455 ECN_NOCARE, &ecn, &ip->ip_tos) == 0) {
456 m_freem(m);
457 goto drop;
458 }
459 break;
460 #endif
461 #ifdef INET6
462 case IPPROTO_IPV6:
463 af = AF_INET6;
464 if (m->m_len < sizeof(struct ip6_hdr))
465 m = m_pullup(m, sizeof(struct ip6_hdr));
466 if (m == NULL)
467 goto drop;
468 t = htonl((uint32_t)ecn << 20);
469 ip6 = mtod(m, struct ip6_hdr *);
470 if (ip6_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
471 ECN_NOCARE, &t, &ip6->ip6_flow) == 0) {
472 m_freem(m);
473 goto drop;
474 }
475 break;
476 #endif
477 case IPPROTO_ETHERIP:
478 af = AF_LINK;
479 break;
480 default:
481 m_freem(m);
482 goto drop;
483 }
484
485 #ifdef MAC
486 mac_ifnet_create_mbuf(ifp, m);
487 #endif
488
489 if (bpf_peers_present(ifp->if_bpf)) {
490 uint32_t af1 = af;
491 bpf_mtap2(ifp->if_bpf, &af1, sizeof(af1), m);
492 }
493
494 if ((ifp->if_flags & IFF_MONITOR) != 0) {
495 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
496 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
497 m_freem(m);
498 return;
499 }
500
501 if (ng_gif_input_p != NULL) {
502 (*ng_gif_input_p)(ifp, &m, af);
503 if (m == NULL)
504 goto drop;
505 }
506
507 /*
508 * Put the packet to the network layer input queue according to the
509 * specified address family.
510 * Note: older versions of gif_input directly called network layer
511 * input functions, e.g. ip6_input, here. We changed the policy to
512 * prevent too many recursive calls of such input functions, which
513 * might cause kernel panic. But the change may introduce another
514 * problem; if the input queue is full, packets are discarded.
515 * The kernel stack overflow really happened, and we believed
516 * queue-full rarely occurs, so we changed the policy.
517 */
518 switch (af) {
519 #ifdef INET
520 case AF_INET:
521 isr = NETISR_IP;
522 break;
523 #endif
524 #ifdef INET6
525 case AF_INET6:
526 isr = NETISR_IPV6;
527 break;
528 #endif
529 case AF_LINK:
530 n = sizeof(struct etherip_header) +
531 sizeof(struct ether_header);
532 if (n > m->m_len)
533 m = m_pullup(m, n);
534 if (m == NULL)
535 goto drop;
536 eip = mtod(m, struct etherip_header *);
537 if (eip->eip_ver != ETHERIP_VERSION) {
538 /* discard unknown versions */
539 m_freem(m);
540 goto drop;
541 }
542
543 m_adj_decap(m, sizeof(struct etherip_header));
544
545 m->m_flags &= ~(M_BCAST|M_MCAST);
546 m->m_pkthdr.rcvif = ifp;
547
548 if (ifp->if_bridge) {
549 oldifp = ifp;
550 eh = mtod(m, struct ether_header *);
551 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
552 if (ETHER_IS_BROADCAST(eh->ether_dhost))
553 m->m_flags |= M_BCAST;
554 else
555 m->m_flags |= M_MCAST;
556 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
557 }
558 BRIDGE_INPUT(ifp, m);
559
560 if (m != NULL && ifp != oldifp) {
561 /*
562 * The bridge gave us back itself or one of the
563 * members for which the frame is addressed.
564 */
565 ether_demux(ifp, m);
566 return;
567 }
568 }
569 if (m != NULL)
570 m_freem(m);
571 return;
572
573 default:
574 if (ng_gif_input_orphan_p != NULL)
575 (*ng_gif_input_orphan_p)(ifp, m, af);
576 else
577 m_freem(m);
578 return;
579 }
580
581 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
582 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
583 M_SETFIB(m, ifp->if_fib);
584 netisr_dispatch(isr, m);
585 return;
586 drop:
587 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
588 }
589
590 static int
gif_ioctl(struct ifnet * ifp,u_long cmd,caddr_t data)591 gif_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
592 {
593 struct ifreq *ifr = (struct ifreq*)data;
594 struct gif_softc *sc;
595 u_int options;
596 int error;
597
598 switch (cmd) {
599 case SIOCSIFADDR:
600 ifp->if_flags |= IFF_UP;
601 case SIOCADDMULTI:
602 case SIOCDELMULTI:
603 case SIOCGIFMTU:
604 case SIOCSIFFLAGS:
605 return (0);
606 case SIOCSIFMTU:
607 if (ifr->ifr_mtu < GIF_MTU_MIN ||
608 ifr->ifr_mtu > GIF_MTU_MAX)
609 return (EINVAL);
610 else
611 ifp->if_mtu = ifr->ifr_mtu;
612 return (0);
613 }
614 sx_xlock(&gif_ioctl_sx);
615 sc = ifp->if_softc;
616 if (sc == NULL) {
617 error = ENXIO;
618 goto bad;
619 }
620 error = 0;
621 switch (cmd) {
622 case SIOCDIFPHYADDR:
623 if (sc->gif_family == 0)
624 break;
625 gif_delete_tunnel(sc);
626 break;
627 #ifdef INET
628 case SIOCSIFPHYADDR:
629 case SIOCGIFPSRCADDR:
630 case SIOCGIFPDSTADDR:
631 error = in_gif_ioctl(sc, cmd, data);
632 break;
633 #endif
634 #ifdef INET6
635 case SIOCSIFPHYADDR_IN6:
636 case SIOCGIFPSRCADDR_IN6:
637 case SIOCGIFPDSTADDR_IN6:
638 error = in6_gif_ioctl(sc, cmd, data);
639 break;
640 #endif
641 case SIOCGTUNFIB:
642 ifr->ifr_fib = sc->gif_fibnum;
643 break;
644 case SIOCSTUNFIB:
645 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
646 break;
647 if (ifr->ifr_fib >= rt_numfibs)
648 error = EINVAL;
649 else
650 sc->gif_fibnum = ifr->ifr_fib;
651 break;
652 case GIFGOPTS:
653 options = sc->gif_options;
654 error = copyout(&options, ifr_data_get_ptr(ifr),
655 sizeof(options));
656 break;
657 case GIFSOPTS:
658 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
659 break;
660 error = copyin(ifr_data_get_ptr(ifr), &options,
661 sizeof(options));
662 if (error)
663 break;
664 if (options & ~GIF_OPTMASK) {
665 error = EINVAL;
666 break;
667 }
668 if (sc->gif_options != options) {
669 switch (sc->gif_family) {
670 #ifdef INET
671 case AF_INET:
672 error = in_gif_setopts(sc, options);
673 break;
674 #endif
675 #ifdef INET6
676 case AF_INET6:
677 error = in6_gif_setopts(sc, options);
678 break;
679 #endif
680 default:
681 /* No need to invoke AF-handler */
682 sc->gif_options = options;
683 }
684 }
685 break;
686 default:
687 error = EINVAL;
688 break;
689 }
690 if (error == 0 && sc->gif_family != 0) {
691 if (
692 #ifdef INET
693 cmd == SIOCSIFPHYADDR ||
694 #endif
695 #ifdef INET6
696 cmd == SIOCSIFPHYADDR_IN6 ||
697 #endif
698 0) {
699 if_link_state_change(ifp, LINK_STATE_UP);
700 }
701 }
702 bad:
703 sx_xunlock(&gif_ioctl_sx);
704 return (error);
705 }
706
707 static void
gif_delete_tunnel(struct gif_softc * sc)708 gif_delete_tunnel(struct gif_softc *sc)
709 {
710
711 sx_assert(&gif_ioctl_sx, SA_XLOCKED);
712 if (sc->gif_family != 0) {
713 CK_LIST_REMOVE(sc, srchash);
714 CK_LIST_REMOVE(sc, chain);
715 /* Wait until it become safe to free gif_hdr */
716 GIF_WAIT();
717 free(sc->gif_hdr, M_GIF);
718 }
719 sc->gif_family = 0;
720 GIF2IFP(sc)->if_drv_flags &= ~IFF_DRV_RUNNING;
721 if_link_state_change(GIF2IFP(sc), LINK_STATE_DOWN);
722 }
723