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 if (ifp->if_bridge)
316 af = AF_LINK;
317 else
318 af = m->m_pkthdr.csum_data;
319 m->m_flags &= ~(M_BCAST|M_MCAST);
320 M_SETFIB(m, sc->gif_fibnum);
321 BPF_MTAP2(ifp, &af, sizeof(af), m);
322 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
323 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
324 /* inner AF-specific encapsulation */
325 ecn = 0;
326 switch (af) {
327 #ifdef INET
328 case AF_INET:
329 proto = IPPROTO_IPV4;
330 if (m->m_len < sizeof(struct ip))
331 m = m_pullup(m, sizeof(struct ip));
332 if (m == NULL) {
333 error = ENOBUFS;
334 goto err;
335 }
336 ip = mtod(m, struct ip *);
337 ip_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
338 ECN_NOCARE, &ecn, &ip->ip_tos);
339 break;
340 #endif
341 #ifdef INET6
342 case AF_INET6:
343 proto = IPPROTO_IPV6;
344 if (m->m_len < sizeof(struct ip6_hdr))
345 m = m_pullup(m, sizeof(struct ip6_hdr));
346 if (m == NULL) {
347 error = ENOBUFS;
348 goto err;
349 }
350 t = 0;
351 ip6 = mtod(m, struct ip6_hdr *);
352 ip6_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
353 ECN_NOCARE, &t, &ip6->ip6_flow);
354 ecn = (ntohl(t) >> 20) & 0xff;
355 break;
356 #endif
357 case AF_LINK:
358 proto = IPPROTO_ETHERIP;
359 M_PREPEND(m, sizeof(struct etherip_header), M_NOWAIT);
360 if (m == NULL) {
361 error = ENOBUFS;
362 goto err;
363 }
364 eth = mtod(m, struct etherip_header *);
365 eth->eip_resvh = 0;
366 eth->eip_ver = ETHERIP_VERSION;
367 eth->eip_resvl = 0;
368 break;
369 default:
370 error = EAFNOSUPPORT;
371 m_freem(m);
372 goto err;
373 }
374 /* XXX should we check if our outer source is legal? */
375 /* dispatch to output logic based on outer AF */
376 switch (sc->gif_family) {
377 #ifdef INET
378 case AF_INET:
379 error = in_gif_output(ifp, m, proto, ecn);
380 break;
381 #endif
382 #ifdef INET6
383 case AF_INET6:
384 error = in6_gif_output(ifp, m, proto, ecn);
385 break;
386 #endif
387 default:
388 m_freem(m);
389 }
390 err:
391 if (error)
392 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
393 return (error);
394 }
395
396 static void
gif_qflush(struct ifnet * ifp __unused)397 gif_qflush(struct ifnet *ifp __unused)
398 {
399
400 }
401
402 int
gif_output(struct ifnet * ifp,struct mbuf * m,const struct sockaddr * dst,struct route * ro)403 gif_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
404 struct route *ro)
405 {
406 uint32_t af;
407
408 KASSERT(ifp->if_bridge == NULL,
409 ("%s: unexpectedly called with bridge attached", __func__));
410
411 /* BPF writes need to be handled specially. */
412 if (dst->sa_family == AF_UNSPEC || dst->sa_family == pseudo_AF_HDRCMPLT)
413 memcpy(&af, dst->sa_data, sizeof(af));
414 else
415 af = RO_GET_FAMILY(ro, dst);
416 /*
417 * Now save the af in the inbound pkt csum data, this is a cheat since
418 * we are using the inbound csum_data field to carry the af over to
419 * the gif_transmit() routine, avoiding using yet another mtag.
420 */
421 m->m_pkthdr.csum_data = af;
422 return (ifp->if_transmit(ifp, m));
423 }
424
425 void
gif_input(struct mbuf * m,struct ifnet * ifp,int proto,uint8_t ecn)426 gif_input(struct mbuf *m, struct ifnet *ifp, int proto, uint8_t ecn)
427 {
428 struct etherip_header *eip;
429 #ifdef INET
430 struct ip *ip;
431 #endif
432 #ifdef INET6
433 struct ip6_hdr *ip6;
434 uint32_t t;
435 #endif
436 struct ether_header *eh;
437 struct ifnet *oldifp;
438 int isr, n, af;
439
440 NET_EPOCH_ASSERT();
441
442 if (ifp == NULL) {
443 /* just in case */
444 m_freem(m);
445 return;
446 }
447 m->m_pkthdr.rcvif = ifp;
448 m_clrprotoflags(m);
449 switch (proto) {
450 #ifdef INET
451 case IPPROTO_IPV4:
452 af = AF_INET;
453 if (m->m_len < sizeof(struct ip))
454 m = m_pullup(m, sizeof(struct ip));
455 if (m == NULL)
456 goto drop;
457 ip = mtod(m, struct ip *);
458 if (ip_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
459 ECN_NOCARE, &ecn, &ip->ip_tos) == 0) {
460 m_freem(m);
461 goto drop;
462 }
463 break;
464 #endif
465 #ifdef INET6
466 case IPPROTO_IPV6:
467 af = AF_INET6;
468 if (m->m_len < sizeof(struct ip6_hdr))
469 m = m_pullup(m, sizeof(struct ip6_hdr));
470 if (m == NULL)
471 goto drop;
472 t = htonl((uint32_t)ecn << 20);
473 ip6 = mtod(m, struct ip6_hdr *);
474 if (ip6_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
475 ECN_NOCARE, &t, &ip6->ip6_flow) == 0) {
476 m_freem(m);
477 goto drop;
478 }
479 break;
480 #endif
481 case IPPROTO_ETHERIP:
482 af = AF_LINK;
483 break;
484 default:
485 m_freem(m);
486 goto drop;
487 }
488
489 #ifdef MAC
490 mac_ifnet_create_mbuf(ifp, m);
491 #endif
492
493 if (bpf_peers_present(ifp->if_bpf)) {
494 uint32_t af1 = af;
495 bpf_mtap2(ifp->if_bpf, &af1, sizeof(af1), m);
496 }
497
498 if ((ifp->if_flags & IFF_MONITOR) != 0) {
499 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
500 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
501 m_freem(m);
502 return;
503 }
504
505 if (ng_gif_input_p != NULL) {
506 (*ng_gif_input_p)(ifp, &m, af);
507 if (m == NULL)
508 goto drop;
509 }
510
511 /*
512 * Put the packet to the network layer input queue according to the
513 * specified address family.
514 * Note: older versions of gif_input directly called network layer
515 * input functions, e.g. ip6_input, here. We changed the policy to
516 * prevent too many recursive calls of such input functions, which
517 * might cause kernel panic. But the change may introduce another
518 * problem; if the input queue is full, packets are discarded.
519 * The kernel stack overflow really happened, and we believed
520 * queue-full rarely occurs, so we changed the policy.
521 */
522 switch (af) {
523 #ifdef INET
524 case AF_INET:
525 isr = NETISR_IP;
526 break;
527 #endif
528 #ifdef INET6
529 case AF_INET6:
530 isr = NETISR_IPV6;
531 break;
532 #endif
533 case AF_LINK:
534 n = sizeof(struct etherip_header) +
535 sizeof(struct ether_header);
536 if (n > m->m_len)
537 m = m_pullup(m, n);
538 if (m == NULL)
539 goto drop;
540 eip = mtod(m, struct etherip_header *);
541 if (eip->eip_ver != ETHERIP_VERSION) {
542 /* discard unknown versions */
543 m_freem(m);
544 goto drop;
545 }
546
547 m_adj_decap(m, sizeof(struct etherip_header));
548
549 m->m_flags &= ~(M_BCAST|M_MCAST);
550 m->m_pkthdr.rcvif = ifp;
551
552 if (ifp->if_bridge) {
553 oldifp = ifp;
554 eh = mtod(m, struct ether_header *);
555 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
556 if (ETHER_IS_BROADCAST(eh->ether_dhost))
557 m->m_flags |= M_BCAST;
558 else
559 m->m_flags |= M_MCAST;
560 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
561 }
562 BRIDGE_INPUT(ifp, m);
563
564 if (m != NULL && ifp != oldifp) {
565 /*
566 * The bridge gave us back itself or one of the
567 * members for which the frame is addressed.
568 */
569 ether_demux(ifp, m);
570 return;
571 }
572 }
573 if (m != NULL)
574 m_freem(m);
575 return;
576
577 default:
578 if (ng_gif_input_orphan_p != NULL)
579 (*ng_gif_input_orphan_p)(ifp, m, af);
580 else
581 m_freem(m);
582 return;
583 }
584
585 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
586 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
587 M_SETFIB(m, ifp->if_fib);
588 netisr_dispatch(isr, m);
589 return;
590 drop:
591 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
592 }
593
594 static int
gif_ioctl(struct ifnet * ifp,u_long cmd,caddr_t data)595 gif_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
596 {
597 struct ifreq *ifr = (struct ifreq*)data;
598 struct gif_softc *sc;
599 u_int options;
600 int error;
601
602 switch (cmd) {
603 case SIOCSIFADDR:
604 ifp->if_flags |= IFF_UP;
605 case SIOCADDMULTI:
606 case SIOCDELMULTI:
607 case SIOCGIFMTU:
608 case SIOCSIFFLAGS:
609 return (0);
610 case SIOCSIFMTU:
611 if (ifr->ifr_mtu < GIF_MTU_MIN ||
612 ifr->ifr_mtu > GIF_MTU_MAX)
613 return (EINVAL);
614 else
615 ifp->if_mtu = ifr->ifr_mtu;
616 return (0);
617 }
618 sx_xlock(&gif_ioctl_sx);
619 sc = ifp->if_softc;
620 if (sc == NULL) {
621 error = ENXIO;
622 goto bad;
623 }
624 error = 0;
625 switch (cmd) {
626 case SIOCDIFPHYADDR:
627 if (sc->gif_family == 0)
628 break;
629 gif_delete_tunnel(sc);
630 break;
631 #ifdef INET
632 case SIOCSIFPHYADDR:
633 case SIOCGIFPSRCADDR:
634 case SIOCGIFPDSTADDR:
635 error = in_gif_ioctl(sc, cmd, data);
636 break;
637 #endif
638 #ifdef INET6
639 case SIOCSIFPHYADDR_IN6:
640 case SIOCGIFPSRCADDR_IN6:
641 case SIOCGIFPDSTADDR_IN6:
642 error = in6_gif_ioctl(sc, cmd, data);
643 break;
644 #endif
645 case SIOCGTUNFIB:
646 ifr->ifr_fib = sc->gif_fibnum;
647 break;
648 case SIOCSTUNFIB:
649 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
650 break;
651 if (ifr->ifr_fib >= rt_numfibs)
652 error = EINVAL;
653 else
654 sc->gif_fibnum = ifr->ifr_fib;
655 break;
656 case GIFGOPTS:
657 options = sc->gif_options;
658 error = copyout(&options, ifr_data_get_ptr(ifr),
659 sizeof(options));
660 break;
661 case GIFSOPTS:
662 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
663 break;
664 error = copyin(ifr_data_get_ptr(ifr), &options,
665 sizeof(options));
666 if (error)
667 break;
668 if (options & ~GIF_OPTMASK) {
669 error = EINVAL;
670 break;
671 }
672 if (sc->gif_options != options) {
673 switch (sc->gif_family) {
674 #ifdef INET
675 case AF_INET:
676 error = in_gif_setopts(sc, options);
677 break;
678 #endif
679 #ifdef INET6
680 case AF_INET6:
681 error = in6_gif_setopts(sc, options);
682 break;
683 #endif
684 default:
685 /* No need to invoke AF-handler */
686 sc->gif_options = options;
687 }
688 }
689 break;
690 default:
691 error = EINVAL;
692 break;
693 }
694 if (error == 0 && sc->gif_family != 0) {
695 if (
696 #ifdef INET
697 cmd == SIOCSIFPHYADDR ||
698 #endif
699 #ifdef INET6
700 cmd == SIOCSIFPHYADDR_IN6 ||
701 #endif
702 0) {
703 if_link_state_change(ifp, LINK_STATE_UP);
704 }
705 }
706 bad:
707 sx_xunlock(&gif_ioctl_sx);
708 return (error);
709 }
710
711 static void
gif_delete_tunnel(struct gif_softc * sc)712 gif_delete_tunnel(struct gif_softc *sc)
713 {
714
715 sx_assert(&gif_ioctl_sx, SA_XLOCKED);
716 if (sc->gif_family != 0) {
717 CK_LIST_REMOVE(sc, srchash);
718 CK_LIST_REMOVE(sc, chain);
719 /* Wait until it become safe to free gif_hdr */
720 GIF_WAIT();
721 free(sc->gif_hdr, M_GIF);
722 }
723 sc->gif_family = 0;
724 GIF2IFP(sc)->if_drv_flags &= ~IFF_DRV_RUNNING;
725 if_link_state_change(GIF2IFP(sc), LINK_STATE_DOWN);
726 }
727