FreeBSD/Linux Kernel Cross Reference
sys/net/if_gif.c
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 __FBSDID("$FreeBSD$");
37
38 #include "opt_inet.h"
39 #include "opt_inet6.h"
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/lock.h>
45 #include <sys/malloc.h>
46 #include <sys/mbuf.h>
47 #include <sys/module.h>
48 #include <sys/rmlock.h>
49 #include <sys/socket.h>
50 #include <sys/sockio.h>
51 #include <sys/sx.h>
52 #include <sys/errno.h>
53 #include <sys/time.h>
54 #include <sys/sysctl.h>
55 #include <sys/syslog.h>
56 #include <sys/priv.h>
57 #include <sys/proc.h>
58 #include <sys/conf.h>
59 #include <machine/cpu.h>
60
61 #include <net/if.h>
62 #include <net/if_var.h>
63 #include <net/if_clone.h>
64 #include <net/if_types.h>
65 #include <net/netisr.h>
66 #include <net/route.h>
67 #include <net/bpf.h>
68 #include <net/vnet.h>
69
70 #include <netinet/in.h>
71 #include <netinet/in_systm.h>
72 #include <netinet/ip.h>
73 #include <netinet/ip_ecn.h>
74 #ifdef INET
75 #include <netinet/in_var.h>
76 #include <netinet/ip_var.h>
77 #endif /* INET */
78
79 #ifdef INET6
80 #ifndef INET
81 #include <netinet/in.h>
82 #endif
83 #include <netinet6/in6_var.h>
84 #include <netinet/ip6.h>
85 #include <netinet6/ip6_ecn.h>
86 #include <netinet6/ip6_var.h>
87 #endif /* INET6 */
88
89 #include <netinet/ip_encap.h>
90 #include <net/ethernet.h>
91 #include <net/if_bridgevar.h>
92 #include <net/if_gif.h>
93
94 #include <security/mac/mac_framework.h>
95
96 static const char gifname[] = "gif";
97
98 MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface");
99 static struct sx gif_ioctl_sx;
100 SX_SYSINIT(gif_ioctl_sx, &gif_ioctl_sx, "gif_ioctl");
101
102 void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, int af);
103 void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, int af);
104 void (*ng_gif_attach_p)(struct ifnet *ifp);
105 void (*ng_gif_detach_p)(struct ifnet *ifp);
106
107 #ifdef VIMAGE
108 static void gif_reassign(struct ifnet *, struct vnet *, char *);
109 #endif
110 static void gif_delete_tunnel(struct gif_softc *);
111 static int gif_ioctl(struct ifnet *, u_long, caddr_t);
112 static int gif_transmit(struct ifnet *, struct mbuf *);
113 static void gif_qflush(struct ifnet *);
114 static int gif_clone_create(struct if_clone *, int, caddr_t);
115 static void gif_clone_destroy(struct ifnet *);
116 VNET_DEFINE_STATIC(struct if_clone *, gif_cloner);
117 #define V_gif_cloner VNET(gif_cloner)
118
119 SYSCTL_DECL(_net_link);
120 static SYSCTL_NODE(_net_link, IFT_GIF, gif, CTLFLAG_RW, 0,
121 "Generic Tunnel Interface");
122 #ifndef MAX_GIF_NEST
123 /*
124 * This macro controls the default upper limitation on nesting of gif tunnels.
125 * Since, setting a large value to this macro with a careless configuration
126 * may introduce system crash, we don't allow any nestings by default.
127 * If you need to configure nested gif tunnels, you can define this macro
128 * in your kernel configuration file. However, if you do so, please be
129 * careful to configure the tunnels so that it won't make a loop.
130 */
131 #define MAX_GIF_NEST 1
132 #endif
133 VNET_DEFINE_STATIC(int, max_gif_nesting) = MAX_GIF_NEST;
134 #define V_max_gif_nesting VNET(max_gif_nesting)
135 SYSCTL_INT(_net_link_gif, OID_AUTO, max_nesting, CTLFLAG_VNET | CTLFLAG_RW,
136 &VNET_NAME(max_gif_nesting), 0, "Max nested tunnels");
137
138 static int
139 gif_clone_create(struct if_clone *ifc, int unit, caddr_t params)
140 {
141 struct gif_softc *sc;
142
143 sc = malloc(sizeof(struct gif_softc), M_GIF, M_WAITOK | M_ZERO);
144 sc->gif_fibnum = curthread->td_proc->p_fibnum;
145 GIF2IFP(sc) = if_alloc(IFT_GIF);
146 GIF2IFP(sc)->if_softc = sc;
147 if_initname(GIF2IFP(sc), gifname, unit);
148
149 GIF2IFP(sc)->if_addrlen = 0;
150 GIF2IFP(sc)->if_mtu = GIF_MTU;
151 GIF2IFP(sc)->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
152 GIF2IFP(sc)->if_ioctl = gif_ioctl;
153 GIF2IFP(sc)->if_transmit = gif_transmit;
154 GIF2IFP(sc)->if_qflush = gif_qflush;
155 GIF2IFP(sc)->if_output = gif_output;
156 #ifdef VIMAGE
157 GIF2IFP(sc)->if_reassign = gif_reassign;
158 #endif
159 GIF2IFP(sc)->if_capabilities |= IFCAP_LINKSTATE;
160 GIF2IFP(sc)->if_capenable |= IFCAP_LINKSTATE;
161 if_attach(GIF2IFP(sc));
162 bpfattach(GIF2IFP(sc), DLT_NULL, sizeof(u_int32_t));
163 if (ng_gif_attach_p != NULL)
164 (*ng_gif_attach_p)(GIF2IFP(sc));
165
166 return (0);
167 }
168
169 #ifdef VIMAGE
170 static void
171 gif_reassign(struct ifnet *ifp, struct vnet *new_vnet __unused,
172 char *unused __unused)
173 {
174 struct gif_softc *sc;
175
176 sx_xlock(&gif_ioctl_sx);
177 sc = ifp->if_softc;
178 if (sc != NULL)
179 gif_delete_tunnel(sc);
180 sx_xunlock(&gif_ioctl_sx);
181 }
182 #endif /* VIMAGE */
183
184 static void
185 gif_clone_destroy(struct ifnet *ifp)
186 {
187 struct gif_softc *sc;
188
189 sx_xlock(&gif_ioctl_sx);
190 sc = ifp->if_softc;
191 gif_delete_tunnel(sc);
192 if (ng_gif_detach_p != NULL)
193 (*ng_gif_detach_p)(ifp);
194 bpfdetach(ifp);
195 if_detach(ifp);
196 ifp->if_softc = NULL;
197 sx_xunlock(&gif_ioctl_sx);
198
199 GIF_WAIT();
200 if_free(ifp);
201 free(sc, M_GIF);
202 }
203
204 static void
205 vnet_gif_init(const void *unused __unused)
206 {
207
208 V_gif_cloner = if_clone_simple(gifname, gif_clone_create,
209 gif_clone_destroy, 0);
210 #ifdef INET
211 in_gif_init();
212 #endif
213 #ifdef INET6
214 in6_gif_init();
215 #endif
216 }
217 VNET_SYSINIT(vnet_gif_init, SI_SUB_PSEUDO, SI_ORDER_ANY,
218 vnet_gif_init, NULL);
219
220 static void
221 vnet_gif_uninit(const void *unused __unused)
222 {
223
224 if_clone_detach(V_gif_cloner);
225 #ifdef INET
226 in_gif_uninit();
227 #endif
228 #ifdef INET6
229 in6_gif_uninit();
230 #endif
231 }
232 VNET_SYSUNINIT(vnet_gif_uninit, SI_SUB_PSEUDO, SI_ORDER_ANY,
233 vnet_gif_uninit, NULL);
234
235 static int
236 gifmodevent(module_t mod, int type, void *data)
237 {
238
239 switch (type) {
240 case MOD_LOAD:
241 case MOD_UNLOAD:
242 break;
243 default:
244 return (EOPNOTSUPP);
245 }
246 return (0);
247 }
248
249 static moduledata_t gif_mod = {
250 "if_gif",
251 gifmodevent,
252 0
253 };
254
255 DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
256 MODULE_VERSION(if_gif, 1);
257
258 struct gif_list *
259 gif_hashinit(void)
260 {
261 struct gif_list *hash;
262 int i;
263
264 hash = malloc(sizeof(struct gif_list) * GIF_HASH_SIZE,
265 M_GIF, M_WAITOK);
266 for (i = 0; i < GIF_HASH_SIZE; i++)
267 CK_LIST_INIT(&hash[i]);
268
269 return (hash);
270 }
271
272 void
273 gif_hashdestroy(struct gif_list *hash)
274 {
275
276 free(hash, M_GIF);
277 }
278
279 #define MTAG_GIF 1080679712
280 static int
281 gif_transmit(struct ifnet *ifp, struct mbuf *m)
282 {
283 struct gif_softc *sc;
284 struct etherip_header *eth;
285 #ifdef INET
286 struct ip *ip;
287 #endif
288 #ifdef INET6
289 struct ip6_hdr *ip6;
290 uint32_t t;
291 #endif
292 uint32_t af;
293 uint8_t proto, ecn;
294 int error;
295
296 GIF_RLOCK();
297 #ifdef MAC
298 error = mac_ifnet_check_transmit(ifp, m);
299 if (error) {
300 m_freem(m);
301 goto err;
302 }
303 #endif
304 error = ENETDOWN;
305 sc = ifp->if_softc;
306 if ((ifp->if_flags & IFF_MONITOR) != 0 ||
307 (ifp->if_flags & IFF_UP) == 0 ||
308 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
309 sc->gif_family == 0 ||
310 (error = if_tunnel_check_nesting(ifp, m, MTAG_GIF,
311 V_max_gif_nesting)) != 0) {
312 m_freem(m);
313 goto err;
314 }
315 /* Now pull back the af that we stashed in the csum_data. */
316 if (ifp->if_bridge)
317 af = AF_LINK;
318 else
319 af = m->m_pkthdr.csum_data;
320 m->m_flags &= ~(M_BCAST|M_MCAST);
321 M_SETFIB(m, sc->gif_fibnum);
322 BPF_MTAP2(ifp, &af, sizeof(af), m);
323 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
324 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
325 /* inner AF-specific encapsulation */
326 ecn = 0;
327 switch (af) {
328 #ifdef INET
329 case AF_INET:
330 proto = IPPROTO_IPV4;
331 if (m->m_len < sizeof(struct ip))
332 m = m_pullup(m, sizeof(struct ip));
333 if (m == NULL) {
334 error = ENOBUFS;
335 goto err;
336 }
337 ip = mtod(m, struct ip *);
338 ip_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
339 ECN_NOCARE, &ecn, &ip->ip_tos);
340 break;
341 #endif
342 #ifdef INET6
343 case AF_INET6:
344 proto = IPPROTO_IPV6;
345 if (m->m_len < sizeof(struct ip6_hdr))
346 m = m_pullup(m, sizeof(struct ip6_hdr));
347 if (m == NULL) {
348 error = ENOBUFS;
349 goto err;
350 }
351 t = 0;
352 ip6 = mtod(m, struct ip6_hdr *);
353 ip6_ecn_ingress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
354 ECN_NOCARE, &t, &ip6->ip6_flow);
355 ecn = (ntohl(t) >> 20) & 0xff;
356 break;
357 #endif
358 case AF_LINK:
359 proto = IPPROTO_ETHERIP;
360 M_PREPEND(m, sizeof(struct etherip_header), M_NOWAIT);
361 if (m == NULL) {
362 error = ENOBUFS;
363 goto err;
364 }
365 eth = mtod(m, struct etherip_header *);
366 eth->eip_resvh = 0;
367 eth->eip_ver = ETHERIP_VERSION;
368 eth->eip_resvl = 0;
369 break;
370 default:
371 error = EAFNOSUPPORT;
372 m_freem(m);
373 goto err;
374 }
375 /* XXX should we check if our outer source is legal? */
376 /* dispatch to output logic based on outer AF */
377 switch (sc->gif_family) {
378 #ifdef INET
379 case AF_INET:
380 error = in_gif_output(ifp, m, proto, ecn);
381 break;
382 #endif
383 #ifdef INET6
384 case AF_INET6:
385 error = in6_gif_output(ifp, m, proto, ecn);
386 break;
387 #endif
388 default:
389 m_freem(m);
390 }
391 err:
392 if (error)
393 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
394 GIF_RUNLOCK();
395 return (error);
396 }
397
398 static void
399 gif_qflush(struct ifnet *ifp __unused)
400 {
401
402 }
403
404
405 int
406 gif_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
407 struct route *ro)
408 {
409 uint32_t af;
410
411 if (dst->sa_family == AF_UNSPEC)
412 bcopy(dst->sa_data, &af, sizeof(af));
413 else
414 af = dst->sa_family;
415 /*
416 * Now save the af in the inbound pkt csum data, this is a cheat since
417 * we are using the inbound csum_data field to carry the af over to
418 * the gif_transmit() routine, avoiding using yet another mtag.
419 */
420 m->m_pkthdr.csum_data = af;
421 return (ifp->if_transmit(ifp, m));
422 }
423
424 void
425 gif_input(struct mbuf *m, struct ifnet *ifp, int proto, uint8_t ecn)
426 {
427 struct etherip_header *eip;
428 #ifdef INET
429 struct ip *ip;
430 #endif
431 #ifdef INET6
432 struct ip6_hdr *ip6;
433 uint32_t t;
434 #endif
435 struct ether_header *eh;
436 struct ifnet *oldifp;
437 int isr, n, af;
438
439 if (ifp == NULL) {
440 /* just in case */
441 m_freem(m);
442 return;
443 }
444 m->m_pkthdr.rcvif = ifp;
445 m_clrprotoflags(m);
446 switch (proto) {
447 #ifdef INET
448 case IPPROTO_IPV4:
449 af = AF_INET;
450 if (m->m_len < sizeof(struct ip))
451 m = m_pullup(m, sizeof(struct ip));
452 if (m == NULL)
453 goto drop;
454 ip = mtod(m, struct ip *);
455 if (ip_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
456 ECN_NOCARE, &ecn, &ip->ip_tos) == 0) {
457 m_freem(m);
458 goto drop;
459 }
460 break;
461 #endif
462 #ifdef INET6
463 case IPPROTO_IPV6:
464 af = AF_INET6;
465 if (m->m_len < sizeof(struct ip6_hdr))
466 m = m_pullup(m, sizeof(struct ip6_hdr));
467 if (m == NULL)
468 goto drop;
469 t = htonl((uint32_t)ecn << 20);
470 ip6 = mtod(m, struct ip6_hdr *);
471 if (ip6_ecn_egress((ifp->if_flags & IFF_LINK1) ? ECN_ALLOWED:
472 ECN_NOCARE, &t, &ip6->ip6_flow) == 0) {
473 m_freem(m);
474 goto drop;
475 }
476 break;
477 #endif
478 case IPPROTO_ETHERIP:
479 af = AF_LINK;
480 break;
481 default:
482 m_freem(m);
483 goto drop;
484 }
485
486 #ifdef MAC
487 mac_ifnet_create_mbuf(ifp, m);
488 #endif
489
490 if (bpf_peers_present(ifp->if_bpf)) {
491 uint32_t af1 = af;
492 bpf_mtap2(ifp->if_bpf, &af1, sizeof(af1), m);
493 }
494
495 if ((ifp->if_flags & IFF_MONITOR) != 0) {
496 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
497 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
498 m_freem(m);
499 return;
500 }
501
502 if (ng_gif_input_p != NULL) {
503 (*ng_gif_input_p)(ifp, &m, af);
504 if (m == NULL)
505 goto drop;
506 }
507
508 /*
509 * Put the packet to the network layer input queue according to the
510 * specified address family.
511 * Note: older versions of gif_input directly called network layer
512 * input functions, e.g. ip6_input, here. We changed the policy to
513 * prevent too many recursive calls of such input functions, which
514 * might cause kernel panic. But the change may introduce another
515 * problem; if the input queue is full, packets are discarded.
516 * The kernel stack overflow really happened, and we believed
517 * queue-full rarely occurs, so we changed the policy.
518 */
519 switch (af) {
520 #ifdef INET
521 case AF_INET:
522 isr = NETISR_IP;
523 break;
524 #endif
525 #ifdef INET6
526 case AF_INET6:
527 isr = NETISR_IPV6;
528 break;
529 #endif
530 case AF_LINK:
531 n = sizeof(struct etherip_header) +
532 sizeof(struct ether_header);
533 if (n > m->m_len)
534 m = m_pullup(m, n);
535 if (m == NULL)
536 goto drop;
537 eip = mtod(m, struct etherip_header *);
538 if (eip->eip_ver != ETHERIP_VERSION) {
539 /* discard unknown versions */
540 m_freem(m);
541 goto drop;
542 }
543
544 m_adj_decap(m, sizeof(struct etherip_header));
545
546 m->m_flags &= ~(M_BCAST|M_MCAST);
547 m->m_pkthdr.rcvif = ifp;
548
549 if (ifp->if_bridge) {
550 oldifp = ifp;
551 eh = mtod(m, struct ether_header *);
552 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
553 if (ETHER_IS_BROADCAST(eh->ether_dhost))
554 m->m_flags |= M_BCAST;
555 else
556 m->m_flags |= M_MCAST;
557 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
558 }
559 BRIDGE_INPUT(ifp, m);
560
561 if (m != NULL && ifp != oldifp) {
562 /*
563 * The bridge gave us back itself or one of the
564 * members for which the frame is addressed.
565 */
566 ether_demux(ifp, m);
567 return;
568 }
569 }
570 if (m != NULL)
571 m_freem(m);
572 return;
573
574 default:
575 if (ng_gif_input_orphan_p != NULL)
576 (*ng_gif_input_orphan_p)(ifp, m, af);
577 else
578 m_freem(m);
579 return;
580 }
581
582 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
583 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
584 M_SETFIB(m, ifp->if_fib);
585 netisr_dispatch(isr, m);
586 return;
587 drop:
588 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
589 }
590
591 static int
592 gif_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
593 {
594 struct ifreq *ifr = (struct ifreq*)data;
595 struct gif_softc *sc;
596 u_int options;
597 int error;
598
599 switch (cmd) {
600 case SIOCSIFADDR:
601 ifp->if_flags |= IFF_UP;
602 case SIOCADDMULTI:
603 case SIOCDELMULTI:
604 case SIOCGIFMTU:
605 case SIOCSIFFLAGS:
606 return (0);
607 case SIOCSIFMTU:
608 if (ifr->ifr_mtu < GIF_MTU_MIN ||
609 ifr->ifr_mtu > GIF_MTU_MAX)
610 return (EINVAL);
611 else
612 ifp->if_mtu = ifr->ifr_mtu;
613 return (0);
614 }
615 sx_xlock(&gif_ioctl_sx);
616 sc = ifp->if_softc;
617 if (sc == NULL) {
618 error = ENXIO;
619 goto bad;
620 }
621 error = 0;
622 switch (cmd) {
623 case SIOCDIFPHYADDR:
624 if (sc->gif_family == 0)
625 break;
626 gif_delete_tunnel(sc);
627 break;
628 #ifdef INET
629 case SIOCSIFPHYADDR:
630 case SIOCGIFPSRCADDR:
631 case SIOCGIFPDSTADDR:
632 error = in_gif_ioctl(sc, cmd, data);
633 break;
634 #endif
635 #ifdef INET6
636 case SIOCSIFPHYADDR_IN6:
637 case SIOCGIFPSRCADDR_IN6:
638 case SIOCGIFPDSTADDR_IN6:
639 error = in6_gif_ioctl(sc, cmd, data);
640 break;
641 #endif
642 case SIOCGTUNFIB:
643 ifr->ifr_fib = sc->gif_fibnum;
644 break;
645 case SIOCSTUNFIB:
646 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
647 break;
648 if (ifr->ifr_fib >= rt_numfibs)
649 error = EINVAL;
650 else
651 sc->gif_fibnum = ifr->ifr_fib;
652 break;
653 case GIFGOPTS:
654 options = sc->gif_options;
655 error = copyout(&options, ifr_data_get_ptr(ifr),
656 sizeof(options));
657 break;
658 case GIFSOPTS:
659 if ((error = priv_check(curthread, PRIV_NET_GIF)) != 0)
660 break;
661 error = copyin(ifr_data_get_ptr(ifr), &options,
662 sizeof(options));
663 if (error)
664 break;
665 if (options & ~GIF_OPTMASK) {
666 error = EINVAL;
667 break;
668 }
669 if (sc->gif_options != options) {
670 switch (sc->gif_family) {
671 #ifdef INET
672 case AF_INET:
673 error = in_gif_setopts(sc, options);
674 break;
675 #endif
676 #ifdef INET6
677 case AF_INET6:
678 error = in6_gif_setopts(sc, options);
679 break;
680 #endif
681 default:
682 /* No need to invoke AF-handler */
683 sc->gif_options = options;
684 }
685 }
686 break;
687 default:
688 error = EINVAL;
689 break;
690 }
691 if (error == 0 && sc->gif_family != 0) {
692 if (
693 #ifdef INET
694 cmd == SIOCSIFPHYADDR ||
695 #endif
696 #ifdef INET6
697 cmd == SIOCSIFPHYADDR_IN6 ||
698 #endif
699 0) {
700 if_link_state_change(ifp, LINK_STATE_UP);
701 }
702 }
703 bad:
704 sx_xunlock(&gif_ioctl_sx);
705 return (error);
706 }
707
708 static void
709 gif_delete_tunnel(struct gif_softc *sc)
710 {
711
712 sx_assert(&gif_ioctl_sx, SA_XLOCKED);
713 if (sc->gif_family != 0) {
714 CK_LIST_REMOVE(sc, srchash);
715 CK_LIST_REMOVE(sc, chain);
716 /* Wait until it become safe to free gif_hdr */
717 GIF_WAIT();
718 free(sc->gif_hdr, M_GIF);
719 }
720 sc->gif_family = 0;
721 GIF2IFP(sc)->if_drv_flags &= ~IFF_DRV_RUNNING;
722 if_link_state_change(GIF2IFP(sc), LINK_STATE_DOWN);
723 }
724
Cache object: bd3774ec6e475608cfd4cebfcc176ae9
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