2 * Copyright (c) 2016 Yandex LLC
3 * Copyright (c) 2016 Andrey V. Elsukov <ae@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
32 #include "opt_inet6.h"
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/fnv_hash.h>
40 #include <sys/malloc.h>
42 #include <sys/module.h>
43 #include <sys/rmlock.h>
44 #include <sys/socket.h>
45 #include <sys/sockio.h>
47 #include <sys/errno.h>
48 #include <sys/sysctl.h>
54 #include <net/if_var.h>
55 #include <net/if_clone.h>
56 #include <net/if_types.h>
58 #include <net/route.h>
61 #include <netinet/in.h>
62 #include <netinet/in_var.h>
63 #include <netinet/ip.h>
65 #include <netinet/ip6.h>
66 #include <netinet6/in6_var.h>
67 #include <netinet6/scope6_var.h>
69 #include <netipsec/ipsec.h>
71 #include <netipsec/ipsec6.h>
74 #include <net/if_ipsec.h>
75 #include <netipsec/key.h>
77 #include <security/mac/mac_framework.h>
79 static MALLOC_DEFINE(M_IPSEC, "ipsec", "IPsec Virtual Tunnel Interface");
80 static const char ipsecname[] = "ipsec";
82 #if defined(INET) && defined(INET6)
83 #define IPSEC_SPCOUNT 4
85 #define IPSEC_SPCOUNT 2
92 struct secpolicy *sp[IPSEC_SPCOUNT];
97 LIST_ENTRY(ipsec_softc) chain;
98 LIST_ENTRY(ipsec_softc) hash;
101 #define IPSEC_LOCK_INIT(sc) rm_init(&(sc)->lock, "if_ipsec softc")
102 #define IPSEC_LOCK_DESTROY(sc) rm_destroy(&(sc)->lock)
103 #define IPSEC_RLOCK_TRACKER struct rm_priotracker ipsec_tracker
104 #define IPSEC_RLOCK(sc) rm_rlock(&(sc)->lock, &ipsec_tracker)
105 #define IPSEC_RUNLOCK(sc) rm_runlock(&(sc)->lock, &ipsec_tracker)
106 #define IPSEC_RLOCK_ASSERT(sc) rm_assert(&(sc)->lock, RA_RLOCKED)
107 #define IPSEC_WLOCK(sc) rm_wlock(&(sc)->lock)
108 #define IPSEC_WUNLOCK(sc) rm_wunlock(&(sc)->lock)
109 #define IPSEC_WLOCK_ASSERT(sc) rm_assert(&(sc)->lock, RA_WLOCKED)
111 static struct rmlock ipsec_sc_lock;
112 RM_SYSINIT(ipsec_sc_lock, &ipsec_sc_lock, "if_ipsec softc list");
114 #define IPSEC_SC_RLOCK_TRACKER struct rm_priotracker ipsec_sc_tracker
115 #define IPSEC_SC_RLOCK() rm_rlock(&ipsec_sc_lock, &ipsec_sc_tracker)
116 #define IPSEC_SC_RUNLOCK() rm_runlock(&ipsec_sc_lock, &ipsec_sc_tracker)
117 #define IPSEC_SC_RLOCK_ASSERT() rm_assert(&ipsec_sc_lock, RA_RLOCKED)
118 #define IPSEC_SC_WLOCK() rm_wlock(&ipsec_sc_lock)
119 #define IPSEC_SC_WUNLOCK() rm_wunlock(&ipsec_sc_lock)
120 #define IPSEC_SC_WLOCK_ASSERT() rm_assert(&ipsec_sc_lock, RA_WLOCKED)
122 LIST_HEAD(ipsec_iflist, ipsec_softc);
123 static VNET_DEFINE(struct ipsec_iflist, ipsec_sc_list);
124 static VNET_DEFINE(struct ipsec_iflist *, ipsec_sc_htbl);
125 static VNET_DEFINE(u_long, ipsec_sc_hmask);
126 #define V_ipsec_sc_list VNET(ipsec_sc_list)
127 #define V_ipsec_sc_htbl VNET(ipsec_sc_htbl)
128 #define V_ipsec_sc_hmask VNET(ipsec_sc_hmask)
131 ipsec_hash(uint32_t id)
134 return (fnv_32_buf(&id, sizeof(id), FNV1_32_INIT));
137 #define SCHASH_NHASH_LOG2 5
138 #define SCHASH_NHASH (1 << SCHASH_NHASH_LOG2)
139 #define SCHASH_HASHVAL(id) (ipsec_hash((id)) & V_ipsec_sc_hmask)
140 #define SCHASH_HASH(id) &V_ipsec_sc_htbl[SCHASH_HASHVAL(id)]
143 * ipsec_ioctl_sx protects from concurrent ioctls.
145 static struct sx ipsec_ioctl_sx;
146 SX_SYSINIT(ipsec_ioctl_sx, &ipsec_ioctl_sx, "ipsec_ioctl");
148 static int ipsec_init_reqid(struct ipsec_softc *);
149 static int ipsec_set_tunnel(struct ipsec_softc *, struct sockaddr *,
150 struct sockaddr *, uint32_t);
151 static void ipsec_delete_tunnel(struct ifnet *, int);
153 static int ipsec_set_addresses(struct ifnet *, struct sockaddr *,
155 static int ipsec_set_reqid(struct ifnet *, uint32_t);
157 static int ipsec_ioctl(struct ifnet *, u_long, caddr_t);
158 static int ipsec_transmit(struct ifnet *, struct mbuf *);
159 static int ipsec_output(struct ifnet *, struct mbuf *,
160 const struct sockaddr *, struct route *);
161 static void ipsec_qflush(struct ifnet *);
162 static int ipsec_clone_create(struct if_clone *, int, caddr_t);
163 static void ipsec_clone_destroy(struct ifnet *);
165 static VNET_DEFINE(struct if_clone *, ipsec_cloner);
166 #define V_ipsec_cloner VNET(ipsec_cloner)
169 ipsec_clone_create(struct if_clone *ifc, int unit, caddr_t params)
171 struct ipsec_softc *sc;
174 sc = malloc(sizeof(*sc), M_IPSEC, M_WAITOK | M_ZERO);
175 sc->fibnum = curthread->td_proc->p_fibnum;
176 sc->ifp = ifp = if_alloc(IFT_TUNNEL);
179 if_initname(ifp, ipsecname, unit);
182 ifp->if_mtu = IPSEC_MTU;
183 ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
184 ifp->if_ioctl = ipsec_ioctl;
185 ifp->if_transmit = ipsec_transmit;
186 ifp->if_qflush = ipsec_qflush;
187 ifp->if_output = ipsec_output;
189 bpfattach(ifp, DLT_NULL, sizeof(uint32_t));
192 LIST_INSERT_HEAD(&V_ipsec_sc_list, sc, chain);
198 ipsec_clone_destroy(struct ifnet *ifp)
200 struct ipsec_softc *sc;
202 sx_xlock(&ipsec_ioctl_sx);
206 ipsec_delete_tunnel(ifp, 1);
207 LIST_REMOVE(sc, chain);
212 ifp->if_softc = NULL;
213 sx_xunlock(&ipsec_ioctl_sx);
216 IPSEC_LOCK_DESTROY(sc);
221 vnet_ipsec_init(const void *unused __unused)
224 LIST_INIT(&V_ipsec_sc_list);
225 V_ipsec_sc_htbl = hashinit(SCHASH_NHASH, M_IPSEC, &V_ipsec_sc_hmask);
226 V_ipsec_cloner = if_clone_simple(ipsecname, ipsec_clone_create,
227 ipsec_clone_destroy, 0);
229 VNET_SYSINIT(vnet_ipsec_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
230 vnet_ipsec_init, NULL);
233 vnet_ipsec_uninit(const void *unused __unused)
236 if_clone_detach(V_ipsec_cloner);
237 hashdestroy(V_ipsec_sc_htbl, M_IPSEC, V_ipsec_sc_hmask);
239 VNET_SYSUNINIT(vnet_ipsec_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
240 vnet_ipsec_uninit, NULL);
242 static struct secpolicy *
243 ipsec_getpolicy(struct ipsec_softc *sc, int dir, sa_family_t af)
249 return (sc->sp[(dir == IPSEC_DIR_INBOUND ? 0: 1)]);
253 return (sc->sp[(dir == IPSEC_DIR_INBOUND ? 0: 1)
263 static struct secasindex *
264 ipsec_getsaidx(struct ipsec_softc *sc, int dir, sa_family_t af)
266 struct secpolicy *sp;
268 sp = ipsec_getpolicy(sc, dir, af);
271 return (&sp->req[0]->saidx);
275 ipsec_transmit(struct ifnet *ifp, struct mbuf *m)
278 struct ipsec_softc *sc;
279 struct secpolicy *sp;
285 error = mac_ifnet_check_transmit(ifp, m);
293 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
294 (ifp->if_flags & IFF_MONITOR) != 0 ||
295 (ifp->if_flags & IFF_UP) == 0) {
300 /* Determine address family to correctly handle packet in BPF */
301 ip = mtod(m, struct ip *);
309 case (IPV6_VERSION >> 4):
314 error = EAFNOSUPPORT;
321 * XXX: for now just check presence of IPSEC_OUT_DONE mbuf tag.
322 * We can read full chain and compare destination address,
323 * proto and mode from xform_history with values from softc.
325 if (m_tag_find(m, PACKET_TAG_IPSEC_OUT_DONE, NULL) != NULL) {
331 if (sc->family == 0) {
336 sp = ipsec_getpolicy(sc, IPSEC_DIR_OUTBOUND, af);
338 M_SETFIB(m, sc->fibnum);
341 BPF_MTAP2(ifp, &af, sizeof(af), m);
342 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
343 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
348 error = ipsec4_process_packet(m, sp, NULL);
353 error = ipsec6_process_packet(m, sp, NULL);
357 panic("%s: unknown address family\n", __func__);
361 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
366 ipsec_qflush(struct ifnet *ifp __unused)
372 ipsec_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
376 return (ifp->if_transmit(ifp, m));
380 ipsec_if_input(struct mbuf *m, struct secasvar *sav, uint32_t af)
382 IPSEC_SC_RLOCK_TRACKER;
383 struct secasindex *saidx;
384 struct ipsec_softc *sc;
387 if (sav->state != SADB_SASTATE_MATURE &&
388 sav->state != SADB_SASTATE_DYING) {
393 if (sav->sah->saidx.mode != IPSEC_MODE_TUNNEL ||
394 sav->sah->saidx.proto != IPPROTO_ESP)
399 * We only acquire SC_RLOCK() while we are doing search in
400 * ipsec_sc_htbl. It is safe, because removing softc or changing
401 * of reqid/addresses requires removing from hash table.
403 LIST_FOREACH(sc, SCHASH_HASH(sav->sah->saidx.reqid), hash) {
404 saidx = ipsec_getsaidx(sc, IPSEC_DIR_INBOUND,
405 sav->sah->saidx.src.sa.sa_family);
406 /* SA's reqid should match reqid in SP */
408 sav->sah->saidx.reqid != saidx->reqid)
410 /* SAH's addresses should match tunnel endpoints. */
411 if (key_sockaddrcmp(&sav->sah->saidx.dst.sa,
412 &saidx->dst.sa, 0) != 0)
414 if (key_sockaddrcmp(&sav->sah->saidx.src.sa,
415 &saidx->src.sa, 0) == 0)
420 /* Tunnel was not found. Nothing to do. */
424 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
425 (ifp->if_flags & IFF_UP) == 0) {
431 * We found matching and working tunnel.
432 * Set its ifnet as receiving interface.
434 m->m_pkthdr.rcvif = ifp;
437 /* m_clrprotoflags(m); */
438 M_SETFIB(m, ifp->if_fib);
439 BPF_MTAP2(ifp, &af, sizeof(af), m);
440 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
441 if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
442 if ((ifp->if_flags & IFF_MONITOR) != 0) {
449 /* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */
451 ipsec_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
454 struct ifreq *ifr = (struct ifreq*)data;
455 struct sockaddr *dst, *src;
456 struct ipsec_softc *sc;
457 struct secasindex *saidx;
459 struct sockaddr_in *sin = NULL;
462 struct sockaddr_in6 *sin6 = NULL;
469 ifp->if_flags |= IFF_UP;
476 if (ifr->ifr_mtu < IPSEC_MTU_MIN ||
477 ifr->ifr_mtu > IPSEC_MTU_MAX)
480 ifp->if_mtu = ifr->ifr_mtu;
483 sx_xlock(&ipsec_ioctl_sx);
485 /* Check that softc is still here */
494 case SIOCSIFPHYADDR_IN6:
500 src = (struct sockaddr *)
501 &(((struct in_aliasreq *)data)->ifra_addr);
502 dst = (struct sockaddr *)
503 &(((struct in_aliasreq *)data)->ifra_dstaddr);
507 case SIOCSIFPHYADDR_IN6:
508 src = (struct sockaddr *)
509 &(((struct in6_aliasreq *)data)->ifra_addr);
510 dst = (struct sockaddr *)
511 &(((struct in6_aliasreq *)data)->ifra_dstaddr);
517 /* sa_family must be equal */
518 if (src->sa_family != dst->sa_family ||
519 src->sa_len != dst->sa_len)
522 /* validate sa_len */
523 switch (src->sa_family) {
526 if (src->sa_len != sizeof(struct sockaddr_in))
532 if (src->sa_len != sizeof(struct sockaddr_in6))
537 error = EAFNOSUPPORT;
540 /* check sa_family looks sane for the cmd */
541 error = EAFNOSUPPORT;
545 if (src->sa_family == AF_INET)
550 case SIOCSIFPHYADDR_IN6:
551 if (src->sa_family == AF_INET6)
556 error = EADDRNOTAVAIL;
557 switch (src->sa_family) {
560 if (satosin(src)->sin_addr.s_addr == INADDR_ANY ||
561 satosin(dst)->sin_addr.s_addr == INADDR_ANY)
567 if (IN6_IS_ADDR_UNSPECIFIED(&satosin6(src)->sin6_addr)
569 IN6_IS_ADDR_UNSPECIFIED(&satosin6(dst)->sin6_addr))
572 * Check validity of the scope zone ID of the
573 * addresses, and convert it into the kernel
574 * internal form if necessary.
576 error = sa6_embedscope(satosin6(src), 0);
579 error = sa6_embedscope(satosin6(dst), 0);
584 error = ipsec_set_addresses(ifp, src, dst);
587 ipsec_delete_tunnel(ifp, 0);
589 case SIOCGIFPSRCADDR:
590 case SIOCGIFPDSTADDR:
592 case SIOCGIFPSRCADDR_IN6:
593 case SIOCGIFPDSTADDR_IN6:
596 if (sc->family == 0) {
598 error = EADDRNOTAVAIL;
601 saidx = ipsec_getsaidx(sc, IPSEC_DIR_OUTBOUND, sc->family);
604 case SIOCGIFPSRCADDR:
605 case SIOCGIFPDSTADDR:
606 if (saidx->src.sa.sa_family != AF_INET) {
607 error = EADDRNOTAVAIL;
610 sin = (struct sockaddr_in *)&ifr->ifr_addr;
611 memset(sin, 0, sizeof(*sin));
612 sin->sin_family = AF_INET;
613 sin->sin_len = sizeof(*sin);
617 case SIOCGIFPSRCADDR_IN6:
618 case SIOCGIFPDSTADDR_IN6:
619 if (saidx->src.sa.sa_family != AF_INET6) {
620 error = EADDRNOTAVAIL;
623 sin6 = (struct sockaddr_in6 *)
624 &(((struct in6_ifreq *)data)->ifr_addr);
625 memset(sin6, 0, sizeof(*sin6));
626 sin6->sin6_family = AF_INET6;
627 sin6->sin6_len = sizeof(*sin6);
631 error = EAFNOSUPPORT;
636 case SIOCGIFPSRCADDR:
637 sin->sin_addr = saidx->src.sin.sin_addr;
639 case SIOCGIFPDSTADDR:
640 sin->sin_addr = saidx->dst.sin.sin_addr;
644 case SIOCGIFPSRCADDR_IN6:
645 sin6->sin6_addr = saidx->src.sin6.sin6_addr;
647 case SIOCGIFPDSTADDR_IN6:
648 sin6->sin6_addr = saidx->dst.sin6.sin6_addr;
658 case SIOCGIFPSRCADDR:
659 case SIOCGIFPDSTADDR:
660 error = prison_if(curthread->td_ucred,
661 (struct sockaddr *)sin);
663 memset(sin, 0, sizeof(*sin));
667 case SIOCGIFPSRCADDR_IN6:
668 case SIOCGIFPDSTADDR_IN6:
669 error = prison_if(curthread->td_ucred,
670 (struct sockaddr *)sin6);
672 error = sa6_recoverscope(sin6);
674 memset(sin6, 0, sizeof(*sin6));
679 ifr->ifr_fib = sc->fibnum;
682 if ((error = priv_check(curthread, PRIV_NET_SETIFFIB)) != 0)
684 if (ifr->ifr_fib >= rt_numfibs)
687 sc->fibnum = ifr->ifr_fib;
691 error = copyout(&reqid, ifr->ifr_data, sizeof(reqid));
694 if ((error = priv_check(curthread, PRIV_NET_SETIFCAP)) != 0)
696 error = copyin(ifr->ifr_data, &reqid, sizeof(reqid));
699 error = ipsec_set_reqid(ifp, reqid);
706 sx_xunlock(&ipsec_ioctl_sx);
711 * Allocate new private security policies for tunneling interface.
712 * Each tunneling interface has following security policies for
714 * 0.0.0.0/0[any] 0.0.0.0/0[any] -P in \
715 * ipsec esp/tunnel/RemoteIP-LocalIP/unique:reqid
716 * 0.0.0.0/0[any] 0.0.0.0/0[any] -P out \
717 * ipsec esp/tunnel/LocalIP-RemoteIP/unique:reqid
720 ipsec_newpolicies(struct ipsec_softc *sc, struct secpolicy *sp[IPSEC_SPCOUNT],
721 const struct sockaddr *src, const struct sockaddr *dst, uint32_t reqid)
723 struct ipsecrequest *isr;
726 memset(sp, 0, sizeof(struct secpolicy *) * IPSEC_SPCOUNT);
727 for (i = 0; i < IPSEC_SPCOUNT; i++) {
728 if ((sp[i] = key_newsp()) == NULL)
730 if ((isr = ipsec_newisr()) == NULL)
733 sp[i]->policy = IPSEC_POLICY_IPSEC;
734 sp[i]->state = IPSEC_SPSTATE_DEAD;
735 sp[i]->req[sp[i]->tcount++] = isr;
736 sp[i]->created = time_second;
737 /* Use priority field to store if_index */
738 sp[i]->priority = sc->ifp->if_index;
739 isr->level = IPSEC_LEVEL_UNIQUE;
740 isr->saidx.proto = IPPROTO_ESP;
741 isr->saidx.mode = IPSEC_MODE_TUNNEL;
742 isr->saidx.reqid = reqid;
744 sp[i]->spidx.dir = IPSEC_DIR_INBOUND;
745 bcopy(src, &isr->saidx.dst, src->sa_len);
746 bcopy(dst, &isr->saidx.src, dst->sa_len);
748 sp[i]->spidx.dir = IPSEC_DIR_OUTBOUND;
749 bcopy(src, &isr->saidx.src, src->sa_len);
750 bcopy(dst, &isr->saidx.dst, dst->sa_len);
752 sp[i]->spidx.ul_proto = IPSEC_ULPROTO_ANY;
755 sp[i]->spidx.src.sa.sa_family =
756 sp[i]->spidx.dst.sa.sa_family = AF_INET;
757 sp[i]->spidx.src.sa.sa_len =
758 sp[i]->spidx.dst.sa.sa_len =
759 sizeof(struct sockaddr_in);
764 sp[i]->spidx.src.sa.sa_family =
765 sp[i]->spidx.dst.sa.sa_family = AF_INET6;
766 sp[i]->spidx.src.sa.sa_len =
767 sp[i]->spidx.dst.sa.sa_len = sizeof(struct sockaddr_in6);
772 for (i = 0; i < IPSEC_SPCOUNT; i++)
778 ipsec_check_reqid(uint32_t reqid)
780 struct ipsec_softc *sc;
782 IPSEC_SC_RLOCK_ASSERT();
783 LIST_FOREACH(sc, &V_ipsec_sc_list, chain) {
784 if (sc->reqid == reqid)
791 * We use key_newreqid() to automatically obtain unique reqid.
792 * Then we check that given id is unique, i.e. it is not used by
793 * another if_ipsec(4) interface. This macro limits the number of
794 * tries to get unique id.
796 #define IPSEC_REQID_TRYCNT 64
798 ipsec_init_reqid(struct ipsec_softc *sc)
803 IPSEC_SC_RLOCK_ASSERT();
805 if (sc->reqid != 0) /* already initialized */
808 trycount = IPSEC_REQID_TRYCNT;
809 while (--trycount > 0) {
810 reqid = key_newreqid();
811 if (ipsec_check_reqid(reqid) == 0)
821 * Set or update reqid for given tunneling interface.
822 * When specified reqid is zero, generate new one.
823 * We are protected by ioctl_sx lock from concurrent id generation.
824 * Also softc would not disappear while we hold ioctl_sx lock.
827 ipsec_set_reqid(struct ifnet *ifp, uint32_t reqid)
829 IPSEC_SC_RLOCK_TRACKER;
830 struct ipsec_softc *sc;
831 struct secasindex *saidx;
833 sx_assert(&ipsec_ioctl_sx, SA_XLOCKED);
836 if (sc->reqid == reqid && reqid != 0)
841 /* Check that specified reqid doesn't exist */
842 if (ipsec_check_reqid(reqid) != 0) {
848 /* Generate new reqid */
849 if (ipsec_init_reqid(sc) != 0) {
856 /* Tunnel isn't fully configured, just return. */
860 saidx = ipsec_getsaidx(sc, IPSEC_DIR_OUTBOUND, sc->family);
861 KASSERT(saidx != NULL,
862 ("saidx is NULL, but family is %d", sc->family));
863 return (ipsec_set_tunnel(sc, &saidx->src.sa, &saidx->dst.sa,
868 * Set tunnel endpoints addresses.
871 ipsec_set_addresses(struct ifnet *ifp, struct sockaddr *src,
872 struct sockaddr *dst)
874 IPSEC_SC_RLOCK_TRACKER;
875 struct ipsec_softc *sc, *tsc;
876 struct secasindex *saidx;
878 sx_assert(&ipsec_ioctl_sx, SA_XLOCKED);
881 if (sc->family != 0) {
882 saidx = ipsec_getsaidx(sc, IPSEC_DIR_OUTBOUND,
884 if (saidx != NULL && saidx->reqid == sc->reqid &&
885 key_sockaddrcmp(&saidx->src.sa, src, 0) == 0 &&
886 key_sockaddrcmp(&saidx->dst.sa, dst, 0) == 0)
887 return (0); /* Nothing has been changed. */
891 * We cannot service IPsec tunnel when source address is
895 if (src->sa_family == AF_INET &&
896 in_localip(satosin(src)->sin_addr) == 0)
897 return (EADDRNOTAVAIL);
901 * NOTE: IPv6 addresses are in kernel internal form with
902 * embedded scope zone id.
904 if (src->sa_family == AF_INET6 &&
905 in6_localip(&satosin6(src)->sin6_addr) == 0)
906 return (EADDRNOTAVAIL);
908 /* Check that given addresses aren't already configured */
910 LIST_FOREACH(tsc, &V_ipsec_sc_list, chain) {
911 if (tsc == sc || tsc->family != src->sa_family)
913 saidx = ipsec_getsaidx(tsc, IPSEC_DIR_OUTBOUND, tsc->family);
914 if (key_sockaddrcmp(&saidx->src.sa, src, 0) == 0 &&
915 key_sockaddrcmp(&saidx->dst.sa, dst, 0) == 0) {
916 /* We already have tunnel with such addresses */
918 return (EADDRNOTAVAIL);
921 /* If reqid is not set, generate new one. */
922 if (ipsec_init_reqid(sc) != 0) {
927 return (ipsec_set_tunnel(sc, src, dst, sc->reqid));
931 ipsec_set_tunnel(struct ipsec_softc *sc, struct sockaddr *src,
932 struct sockaddr *dst, uint32_t reqid)
934 struct secpolicy *sp[IPSEC_SPCOUNT];
935 struct secpolicy *oldsp[IPSEC_SPCOUNT];
938 sx_assert(&ipsec_ioctl_sx, SA_XLOCKED);
940 /* Allocate SP with new addresses. */
941 if (ipsec_newpolicies(sc, sp, src, dst, reqid) == 0) {
942 /* Add new policies to SPDB */
943 if (key_register_ifnet(sp, IPSEC_SPCOUNT) != 0) {
944 for (i = 0; i < IPSEC_SPCOUNT; i++)
949 if ((f = sc->family) != 0)
950 LIST_REMOVE(sc, hash);
952 for (i = 0; i < IPSEC_SPCOUNT; i++) {
953 oldsp[i] = sc->sp[i];
956 sc->family = src->sa_family;
958 LIST_INSERT_HEAD(SCHASH_HASH(sc->reqid), sc, hash);
961 sc->ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
965 sc->ifp->if_drv_flags |= IFF_DRV_RUNNING;
967 key_unregister_ifnet(oldsp, IPSEC_SPCOUNT);
968 for (i = 0; i < IPSEC_SPCOUNT; i++)
969 key_freesp(&oldsp[i]);
975 ipsec_delete_tunnel(struct ifnet *ifp, int locked)
977 struct ipsec_softc *sc = ifp->if_softc;
978 struct secpolicy *oldsp[IPSEC_SPCOUNT];
981 sx_assert(&ipsec_ioctl_sx, SA_XLOCKED);
983 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
984 if (sc->family != 0) {
987 /* Remove from hash table */
988 LIST_REMOVE(sc, hash);
990 for (i = 0; i < IPSEC_SPCOUNT; i++) {
991 oldsp[i] = sc->sp[i];
998 key_unregister_ifnet(oldsp, IPSEC_SPCOUNT);
999 for (i = 0; i < IPSEC_SPCOUNT; i++)
1000 key_freesp(&oldsp[i]);