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
96static const char gifname[] = "gif";
97
98MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface");
99static struct sx gif_ioctl_sx;
100SX_SYSINIT(gif_ioctl_sx, &gif_ioctl_sx, "gif_ioctl");
101
102void	(*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, int af);
103void	(*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, int af);
104void	(*ng_gif_attach_p)(struct ifnet *ifp);
105void	(*ng_gif_detach_p)(struct ifnet *ifp);
106
107#ifdef VIMAGE
108static void	gif_reassign(struct ifnet *, struct vnet *, char *);
109#endif
110static void	gif_delete_tunnel(struct gif_softc *);
111static int	gif_ioctl(struct ifnet *, u_long, caddr_t);
112static int	gif_transmit(struct ifnet *, struct mbuf *);
113static void	gif_qflush(struct ifnet *);
114static int	gif_clone_create(struct if_clone *, int, caddr_t);
115static void	gif_clone_destroy(struct ifnet *);
116VNET_DEFINE_STATIC(struct if_clone *, gif_cloner);
117#define	V_gif_cloner	VNET(gif_cloner)
118
119SYSCTL_DECL(_net_link);
120static SYSCTL_NODE(_net_link, IFT_GIF, gif, CTLFLAG_RW | CTLFLAG_MPSAFE, 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
133VNET_DEFINE_STATIC(int, max_gif_nesting) = MAX_GIF_NEST;
134#define	V_max_gif_nesting	VNET(max_gif_nesting)
135SYSCTL_INT(_net_link_gif, OID_AUTO, max_nesting, CTLFLAG_VNET | CTLFLAG_RW,
136    &VNET_NAME(max_gif_nesting), 0, "Max nested tunnels");
137
138static int
139gif_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
170static void
171gif_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
184static void
185gif_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
204static void
205vnet_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}
217VNET_SYSINIT(vnet_gif_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
218    vnet_gif_init, NULL);
219
220static void
221vnet_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}
232VNET_SYSUNINIT(vnet_gif_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
233    vnet_gif_uninit, NULL);
234
235static int
236gifmodevent(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
249static moduledata_t gif_mod = {
250	"if_gif",
251	gifmodevent,
252	0
253};
254
255DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
256MODULE_VERSION(if_gif, 1);
257
258struct gif_list *
259gif_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
272void
273gif_hashdestroy(struct gif_list *hash)
274{
275
276	free(hash, M_GIF);
277}
278
279#define	MTAG_GIF	1080679712
280static int
281gif_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	NET_EPOCH_ASSERT();
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	}
391err:
392	if (error)
393		if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
394	return (error);
395}
396
397static void
398gif_qflush(struct ifnet *ifp __unused)
399{
400
401}
402
403int
404gif_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
405	struct route *ro)
406{
407	uint32_t af;
408
409	if (dst->sa_family == AF_UNSPEC)
410		bcopy(dst->sa_data, &af, sizeof(af));
411	else
412		af = dst->sa_family;
413	/*
414	 * Now save the af in the inbound pkt csum data, this is a cheat since
415	 * we are using the inbound csum_data field to carry the af over to
416	 * the gif_transmit() routine, avoiding using yet another mtag.
417	 */
418	m->m_pkthdr.csum_data = af;
419	return (ifp->if_transmit(ifp, m));
420}
421
422void
423gif_input(struct mbuf *m, struct ifnet *ifp, int proto, uint8_t ecn)
424{
425	struct etherip_header *eip;
426#ifdef INET
427	struct ip *ip;
428#endif
429#ifdef INET6
430	struct ip6_hdr *ip6;
431	uint32_t t;
432#endif
433	struct ether_header *eh;
434	struct ifnet *oldifp;
435	int isr, n, af;
436
437	NET_EPOCH_ASSERT();
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;
587drop:
588	if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
589}
590
591static int
592gif_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	}
703bad:
704	sx_xunlock(&gif_ioctl_sx);
705	return (error);
706}
707
708static void
709gif_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