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_clone.h>
62 #include <net/if_types.h>
63 #include <net/netisr.h>
64 #include <net/route.h>
65 #include <net/bpf.h>
66 #include <net/vnet.h>
67
68 #include <netinet/in.h>
69 #include <netinet/in_systm.h>
70 #include <netinet/ip.h>
71 #include <netinet/ip_ecn.h>
72 #ifdef INET
73 #include <netinet/in_var.h>
74 #include <netinet/ip_var.h>
75 #endif /* INET */
76
77 #ifdef INET6
78 #ifndef INET
79 #include <netinet/in.h>
80 #endif
81 #include <netinet6/in6_var.h>
82 #include <netinet/ip6.h>
83 #include <netinet6/ip6_ecn.h>
84 #include <netinet6/ip6_var.h>
85 #endif /* INET6 */
86
87 #include <netinet/ip_encap.h>
88 #include <net/ethernet.h>
89 #include <net/if_bridgevar.h>
90 #include <net/if_gif.h>
91
92 #include <security/mac/mac_framework.h>
93
94 static const char gifname[] = "gif";
95
96 MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface");
97 static struct sx gif_ioctl_sx;
98 SX_SYSINIT(gif_ioctl_sx, &gif_ioctl_sx, "gif_ioctl");
99
100 void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, int af);
101 void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, int af);
102 void (*ng_gif_attach_p)(struct ifnet *ifp);
103 void (*ng_gif_detach_p)(struct ifnet *ifp);
104
105 #ifdef VIMAGE
106 static void gif_reassign(struct ifnet *, struct vnet *, char *);
107 #endif
108 static void gif_delete_tunnel(struct gif_softc *);
109 static int gif_ioctl(struct ifnet *, u_long, caddr_t);
110 static int gif_transmit(struct ifnet *, struct mbuf *);
111 static void gif_qflush(struct ifnet *);
112 static int gif_clone_create(struct if_clone *, int, caddr_t);
113 static void gif_clone_destroy(struct ifnet *);
114 VNET_DEFINE_STATIC(struct if_clone *, gif_cloner);
115 #define V_gif_cloner VNET(gif_cloner)
116
117 SYSCTL_DECL(_net_link);
118 static SYSCTL_NODE(_net_link, IFT_GIF, gif, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
119 "Generic Tunnel Interface");
120 #ifndef MAX_GIF_NEST
121 /*
122 * This macro controls the default upper limitation on nesting of gif tunnels.
123 * Since, setting a large value to this macro with a careless configuration
124 * may introduce system crash, we don't allow any nestings by default.
125 * If you need to configure nested gif tunnels, you can define this macro
126 * in your kernel configuration file. However, if you do so, please be
127 * careful to configure the tunnels so that it won't make a loop.
128 */
129 #define MAX_GIF_NEST 1
130 #endif
131 VNET_DEFINE_STATIC(int, max_gif_nesting) = MAX_GIF_NEST;
132 #define V_max_gif_nesting VNET(max_gif_nesting)
133 SYSCTL_INT(_net_link_gif, OID_AUTO, max_nesting, CTLFLAG_VNET | CTLFLAG_RW,
134 &VNET_NAME(max_gif_nesting), 0, "Max nested tunnels");
135
136 static int
gif_clone_create(struct if_clone * ifc,int unit,caddr_t params)137 gif_clone_create(struct if_clone *ifc, int unit, caddr_t params)
138 {
139 struct gif_softc *sc;
140
141 sc = malloc(sizeof(struct gif_softc), M_GIF, M_WAITOK | M_ZERO);
142 sc->gif_fibnum = curthread->td_proc->p_fibnum;
143 GIF2IFP(sc) = if_alloc(IFT_GIF);
144 GIF2IFP(sc)->if_softc = sc;
145 if_initname(GIF2IFP(sc), gifname, unit);
146
147 GIF2IFP(sc)->if_addrlen = 0;
148 GIF2IFP(sc)->if_mtu = GIF_MTU;
149 GIF2IFP(sc)->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
150 GIF2IFP(sc)->if_ioctl = gif_ioctl;
151 GIF2IFP(sc)->if_transmit = gif_transmit;
152 GIF2IFP(sc)->if_qflush = gif_qflush;
153 GIF2IFP(sc)->if_output = gif_output;
154 #ifdef VIMAGE
155 GIF2IFP(sc)->if_reassign = gif_reassign;
156 #endif
157 GIF2IFP(sc)->if_capabilities |= IFCAP_LINKSTATE;
158 GIF2IFP(sc)->if_capenable |= IFCAP_LINKSTATE;
159 if_attach(GIF2IFP(sc));
160 bpfattach(GIF2IFP(sc), DLT_NULL, sizeof(u_int32_t));
161 if (ng_gif_attach_p != NULL)
162 (*ng_gif_attach_p)(GIF2IFP(sc));
163
164 return (0);
165 }
166
167 #ifdef VIMAGE
168 static void
gif_reassign(struct ifnet * ifp,struct vnet * new_vnet __unused,char * unused __unused)169 gif_reassign(struct ifnet *ifp, struct vnet *new_vnet __unused,
170 char *unused __unused)
171 {
172 struct gif_softc *sc;
173
174 sx_xlock(&gif_ioctl_sx);
175 sc = ifp->if_softc;
176 if (sc != NULL)
177 gif_delete_tunnel(sc);
178 sx_xunlock(&gif_ioctl_sx);
179 }
180 #endif /* VIMAGE */
181
182 static void
gif_clone_destroy(struct ifnet * ifp)183 gif_clone_destroy(struct ifnet *ifp)
184 {
185 struct gif_softc *sc;
186
187 sx_xlock(&gif_ioctl_sx);
188 sc = ifp->if_softc;
189 gif_delete_tunnel(sc);
190 if (ng_gif_detach_p != NULL)
191 (*ng_gif_detach_p)(ifp);
192 bpfdetach(ifp);
193 if_detach(ifp);
194 ifp->if_softc = NULL;
195 sx_xunlock(&gif_ioctl_sx);
196
197 GIF_WAIT();
198 if_free(ifp);
199 free(sc, M_GIF);
200 }
201
202 static void
vnet_gif_init(const void * unused __unused)203 vnet_gif_init(const void *unused __unused)
204 {
205
206 V_gif_cloner = if_clone_simple(gifname, gif_clone_create,
207 gif_clone_destroy, 0);
208 #ifdef INET
209 in_gif_init();
210 #endif
211 #ifdef INET6
212 in6_gif_init();
213 #endif
214 }
215 VNET_SYSINIT(vnet_gif_init, SI_SUB_PSEUDO, SI_ORDER_ANY,
216 vnet_gif_init, NULL);
217
218 static void
vnet_gif_uninit(const void * unused __unused)219 vnet_gif_uninit(const void *unused __unused)
220 {
221
222 if_clone_detach(V_gif_cloner);
223 #ifdef INET
224 in_gif_uninit();
225 #endif
226 #ifdef INET6
227 in6_gif_uninit();
228 #endif
229 }
230 VNET_SYSUNINIT(vnet_gif_uninit, SI_SUB_PSEUDO, SI_ORDER_ANY,
231 vnet_gif_uninit, NULL);
232
233 static int
gifmodevent(module_t mod,int type,void * data)234 gifmodevent(module_t mod, int type, void *data)
235 {
236
237 switch (type) {
238 case MOD_LOAD:
239 case MOD_UNLOAD:
240 break;
241 default:
242 return (EOPNOTSUPP);
243 }
244 return (0);
245 }
246
247 static moduledata_t gif_mod = {
248 "if_gif",
249 gifmodevent,
250 0
251 };
252
253 DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
254 MODULE_VERSION(if_gif, 1);
255
256 struct gif_list *
gif_hashinit(void)257 gif_hashinit(void)
258 {
259 struct gif_list *hash;
260 int i;
261
262 hash = malloc(sizeof(struct gif_list) * GIF_HASH_SIZE,
263 M_GIF, M_WAITOK);
264 for (i = 0; i < GIF_HASH_SIZE; i++)
265 CK_LIST_INIT(&hash[i]);
266
267 return (hash);
268 }
269
270 void
gif_hashdestroy(struct gif_list * hash)271 gif_hashdestroy(struct gif_list *hash)
272 {
273
274 free(hash, M_GIF);
275 }
276
277 #define MTAG_GIF 1080679712
278 static int
gif_transmit(struct ifnet * ifp,struct mbuf * m)279 gif_transmit(struct ifnet *ifp, struct mbuf *m)
280 {
281 struct gif_softc *sc;
282 struct etherip_header *eth;
283 #ifdef INET
284 struct ip *ip;
285 #endif
286 #ifdef INET6
287 struct ip6_hdr *ip6;
288 uint32_t t;
289 #endif
290 uint32_t af;
291 uint8_t proto, ecn;
292 int error;
293
294 NET_EPOCH_ASSERT();
295 #ifdef MAC
296 error = mac_ifnet_check_transmit(ifp, m);
297 if (error) {
298 m_freem(m);
299 goto err;
300 }
301 #endif
302 error = ENETDOWN;
303 sc = ifp->if_softc;
304 if ((ifp->if_flags & IFF_MONITOR) != 0 ||
305 (ifp->if_flags & IFF_UP) == 0 ||
306 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
307 sc->gif_family == 0 ||
308 (error = if_tunnel_check_nesting(ifp, m, MTAG_GIF,
309 V_max_gif_nesting)) != 0) {
310 m_freem(m);
311 goto err;
312 }
313 /* Now pull back the af that we stashed in the csum_data. */
314 if (ifp->if_bridge)
315 af = AF_LINK;
316 else
317 af = m->m_pkthdr.csum_data;
318 m->m_flags &= ~(M_BCAST|M_MCAST);
319 M_SETFIB(m, sc->gif_fibnum);
320 BPF_MTAP2(ifp, &af, sizeof(af), m);
321 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
322 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
323 /* inner AF-specific encapsulation */
324 ecn = 0;
325 switch (af) {
326 #ifdef INET
327 case AF_INET:
328 proto = IPPROTO_IPV4;
329 if (m->m_len < sizeof(struct ip))
330 m = m_pullup(m, sizeof(struct ip));
331 if (m == NULL) {
332 error = ENOBUFS;
333 goto err;
334 }
335 ip = mtod(m, struct ip *);
336 ip_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
337 ECN_NOCARE, &ecn, &ip->ip_tos);
338 break;
339 #endif
340 #ifdef INET6
341 case AF_INET6:
342 proto = IPPROTO_IPV6;
343 if (m->m_len < sizeof(struct ip6_hdr))
344 m = m_pullup(m, sizeof(struct ip6_hdr));
345 if (m == NULL) {
346 error = ENOBUFS;
347 goto err;
348 }
349 t = 0;
350 ip6 = mtod(m, struct ip6_hdr *);
351 ip6_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
352 ECN_NOCARE, &t, &ip6->ip6_flow);
353 ecn = (ntohl(t) >> 20) & 0xff;
354 break;
355 #endif
356 case AF_LINK:
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 KASSERT(ifp->if_bridge == NULL,
408 ("%s: unexpectedly called with bridge attached", __func__));
409
410 if (dst->sa_family == AF_UNSPEC)
411 memcpy(&af, dst->sa_data, sizeof(af));
412 else
413 af = RO_GET_FAMILY(ro, dst);
414 /*
415 * Now save the af in the inbound pkt csum data, this is a cheat since
416 * we are using the inbound csum_data field to carry the af over to
417 * the gif_transmit() routine, avoiding using yet another mtag.
418 */
419 m->m_pkthdr.csum_data = af;
420 return (ifp->if_transmit(ifp, m));
421 }
422
423 void
gif_input(struct mbuf * m,struct ifnet * ifp,int proto,uint8_t ecn)424 gif_input(struct mbuf *m, struct ifnet *ifp, int proto, uint8_t ecn)
425 {
426 struct etherip_header *eip;
427 #ifdef INET
428 struct ip *ip;
429 #endif
430 #ifdef INET6
431 struct ip6_hdr *ip6;
432 uint32_t t;
433 #endif
434 struct ether_header *eh;
435 struct ifnet *oldifp;
436 int isr, n, af;
437
438 NET_EPOCH_ASSERT();
439
440 if (ifp == NULL) {
441 /* just in case */
442 m_freem(m);
443 return;
444 }
445 m->m_pkthdr.rcvif = ifp;
446 m_clrprotoflags(m);
447 switch (proto) {
448 #ifdef INET
449 case IPPROTO_IPV4:
450 af = AF_INET;
451 if (m->m_len < sizeof(struct ip))
452 m = m_pullup(m, sizeof(struct ip));
453 if (m == NULL)
454 goto drop;
455 ip = mtod(m, struct ip *);
456 if (ip_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
457 ECN_NOCARE, &ecn, &ip->ip_tos) == 0) {
458 m_freem(m);
459 goto drop;
460 }
461 break;
462 #endif
463 #ifdef INET6
464 case IPPROTO_IPV6:
465 af = AF_INET6;
466 if (m->m_len < sizeof(struct ip6_hdr))
467 m = m_pullup(m, sizeof(struct ip6_hdr));
468 if (m == NULL)
469 goto drop;
470 t = htonl((uint32_t)ecn << 20);
471 ip6 = mtod(m, struct ip6_hdr *);
472 if (ip6_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
473 ECN_NOCARE, &t, &ip6->ip6_flow) == 0) {
474 m_freem(m);
475 goto drop;
476 }
477 break;
478 #endif
479 case IPPROTO_ETHERIP:
480 af = AF_LINK;
481 break;
482 default:
483 m_freem(m);
484 goto drop;
485 }
486
487 #ifdef MAC
488 mac_ifnet_create_mbuf(ifp, m);
489 #endif
490
491 if (bpf_peers_present(ifp->if_bpf)) {
492 uint32_t af1 = af;
493 bpf_mtap2(ifp->if_bpf, &af1, sizeof(af1), m);
494 }
495
496 if ((ifp->if_flags & IFF_MONITOR) != 0) {
497 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
498 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
499 m_freem(m);
500 return;
501 }
502
503 if (ng_gif_input_p != NULL) {
504 (*ng_gif_input_p)(ifp, &m, af);
505 if (m == NULL)
506 goto drop;
507 }
508
509 /*
510 * Put the packet to the network layer input queue according to the
511 * specified address family.
512 * Note: older versions of gif_input directly called network layer
513 * input functions, e.g. ip6_input, here. We changed the policy to
514 * prevent too many recursive calls of such input functions, which
515 * might cause kernel panic. But the change may introduce another
516 * problem; if the input queue is full, packets are discarded.
517 * The kernel stack overflow really happened, and we believed
518 * queue-full rarely occurs, so we changed the policy.
519 */
520 switch (af) {
521 #ifdef INET
522 case AF_INET:
523 isr = NETISR_IP;
524 break;
525 #endif
526 #ifdef INET6
527 case AF_INET6:
528 isr = NETISR_IPV6;
529 break;
530 #endif
531 case AF_LINK:
532 n = sizeof(struct etherip_header) +
533 sizeof(struct ether_header);
534 if (n > m->m_len)
535 m = m_pullup(m, n);
536 if (m == NULL)
537 goto drop;
538 eip = mtod(m, struct etherip_header *);
539 if (eip->eip_ver != ETHERIP_VERSION) {
540 /* discard unknown versions */
541 m_freem(m);
542 goto drop;
543 }
544
545 m_adj_decap(m, sizeof(struct etherip_header));
546
547 m->m_flags &= ~(M_BCAST|M_MCAST);
548 m->m_pkthdr.rcvif = ifp;
549
550 if (ifp->if_bridge) {
551 oldifp = ifp;
552 eh = mtod(m, struct ether_header *);
553 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
554 if (ETHER_IS_BROADCAST(eh->ether_dhost))
555 m->m_flags |= M_BCAST;
556 else
557 m->m_flags |= M_MCAST;
558 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
559 }
560 BRIDGE_INPUT(ifp, m);
561
562 if (m != NULL && ifp != oldifp) {
563 /*
564 * The bridge gave us back itself or one of the
565 * members for which the frame is addressed.
566 */
567 ether_demux(ifp, m);
568 return;
569 }
570 }
571 if (m != NULL)
572 m_freem(m);
573 return;
574
575 default:
576 if (ng_gif_input_orphan_p != NULL)
577 (*ng_gif_input_orphan_p)(ifp, m, af);
578 else
579 m_freem(m);
580 return;
581 }
582
583 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
584 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
585 M_SETFIB(m, ifp->if_fib);
586 netisr_dispatch(isr, m);
587 return;
588 drop:
589 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
590 }
591
592 static int
gif_ioctl(struct ifnet * ifp,u_long cmd,caddr_t data)593 gif_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
594 {
595 struct ifreq *ifr = (struct ifreq*)data;
596 struct gif_softc *sc;
597 u_int options;
598 int error;
599
600 switch (cmd) {
601 case SIOCSIFADDR:
602 ifp->if_flags |= IFF_UP;
603 case SIOCADDMULTI:
604 case SIOCDELMULTI:
605 case SIOCGIFMTU:
606 case SIOCSIFFLAGS:
607 return (0);
608 case SIOCSIFMTU:
609 if (ifr->ifr_mtu < GIF_MTU_MIN ||
610 ifr->ifr_mtu > GIF_MTU_MAX)
611 return (EINVAL);
612 else
613 ifp->if_mtu = ifr->ifr_mtu;
614 return (0);
615 }
616 sx_xlock(&gif_ioctl_sx);
617 sc = ifp->if_softc;
618 if (sc == NULL) {
619 error = ENXIO;
620 goto bad;
621 }
622 error = 0;
623 switch (cmd) {
624 case SIOCDIFPHYADDR:
625 if (sc->gif_family == 0)
626 break;
627 gif_delete_tunnel(sc);
628 break;
629 #ifdef INET
630 case SIOCSIFPHYADDR:
631 case SIOCGIFPSRCADDR:
632 case SIOCGIFPDSTADDR:
633 error = in_gif_ioctl(sc, cmd, data);
634 break;
635 #endif
636 #ifdef INET6
637 case SIOCSIFPHYADDR_IN6:
638 case SIOCGIFPSRCADDR_IN6:
639 case SIOCGIFPDSTADDR_IN6:
640 error = in6_gif_ioctl(sc, cmd, data);
641 break;
642 #endif
643 case SIOCGTUNFIB:
644 ifr->ifr_fib = sc->gif_fibnum;
645 break;
646 case SIOCSTUNFIB:
647 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
648 break;
649 if (ifr->ifr_fib >= rt_numfibs)
650 error = EINVAL;
651 else
652 sc->gif_fibnum = ifr->ifr_fib;
653 break;
654 case GIFGOPTS:
655 options = sc->gif_options;
656 error = copyout(&options, ifr_data_get_ptr(ifr),
657 sizeof(options));
658 break;
659 case GIFSOPTS:
660 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
661 break;
662 error = copyin(ifr_data_get_ptr(ifr), &options,
663 sizeof(options));
664 if (error)
665 break;
666 if (options & ~GIF_OPTMASK) {
667 error = EINVAL;
668 break;
669 }
670 if (sc->gif_options != options) {
671 switch (sc->gif_family) {
672 #ifdef INET
673 case AF_INET:
674 error = in_gif_setopts(sc, options);
675 break;
676 #endif
677 #ifdef INET6
678 case AF_INET6:
679 error = in6_gif_setopts(sc, options);
680 break;
681 #endif
682 default:
683 /* No need to invoke AF-handler */
684 sc->gif_options = options;
685 }
686 }
687 break;
688 default:
689 error = EINVAL;
690 break;
691 }
692 if (error == 0 && sc->gif_family != 0) {
693 if (
694 #ifdef INET
695 cmd == SIOCSIFPHYADDR ||
696 #endif
697 #ifdef INET6
698 cmd == SIOCSIFPHYADDR_IN6 ||
699 #endif
700 0) {
701 if_link_state_change(ifp, LINK_STATE_UP);
702 }
703 }
704 bad:
705 sx_xunlock(&gif_ioctl_sx);
706 return (error);
707 }
708
709 static void
gif_delete_tunnel(struct gif_softc * sc)710 gif_delete_tunnel(struct gif_softc *sc)
711 {
712
713 sx_assert(&gif_ioctl_sx, SA_XLOCKED);
714 if (sc->gif_family != 0) {
715 CK_LIST_REMOVE(sc, srchash);
716 CK_LIST_REMOVE(sc, chain);
717 /* Wait until it become safe to free gif_hdr */
718 GIF_WAIT();
719 free(sc->gif_hdr, M_GIF);
720 }
721 sc->gif_family = 0;
722 GIF2IFP(sc)->if_drv_flags &= ~IFF_DRV_RUNNING;
723 if_link_state_change(GIF2IFP(sc), LINK_STATE_DOWN);
724 }
725