2 * Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * IPsec output processing.
33 #include "opt_inet6.h"
34 #include "opt_ipsec.h"
37 #include <sys/param.h>
38 #include <sys/systm.h>
40 #include <sys/domain.h>
41 #include <sys/protosw.h>
42 #include <sys/socket.h>
43 #include <sys/errno.h>
44 #include <sys/syslog.h>
48 #include <net/route.h>
51 #include <netinet/in.h>
52 #include <netinet/in_systm.h>
53 #include <netinet/ip.h>
54 #include <netinet/ip_var.h>
55 #include <netinet/in_var.h>
56 #include <netinet/ip_ecn.h>
58 #include <netinet6/ip6_ecn.h>
61 #include <netinet/ip6.h>
63 #include <netinet6/ip6_var.h>
65 #include <netinet/in_pcb.h>
67 #include <netinet/icmp6.h>
70 #include <netipsec/ipsec.h>
72 #include <netipsec/ipsec6.h>
74 #include <netipsec/ah_var.h>
75 #include <netipsec/esp_var.h>
76 #include <netipsec/ipcomp_var.h>
78 #include <netipsec/xform.h>
80 #include <netipsec/key.h>
81 #include <netipsec/keydb.h>
82 #include <netipsec/key_debug.h>
84 #include <machine/in_cksum.h>
87 #include <netinet/udp.h>
91 #include <net/if_enc.h>
96 ipsec_process_done(struct mbuf *m, struct ipsecrequest *isr)
98 struct tdb_ident *tdbi;
100 struct secasvar *sav;
101 struct secasindex *saidx;
104 IPSEC_ASSERT(m != NULL, ("null mbuf"));
105 IPSEC_ASSERT(isr != NULL, ("null ISR"));
107 IPSEC_ASSERT(sav != NULL, ("null SA"));
108 IPSEC_ASSERT(sav->sah != NULL, ("null SAH"));
110 saidx = &sav->sah->saidx;
111 switch (saidx->dst.sa.sa_family) {
114 /* Fix the header length, for AH processing. */
115 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len);
120 /* Fix the header length, for AH processing. */
121 if (m->m_pkthdr.len < sizeof (struct ip6_hdr)) {
125 if (m->m_pkthdr.len - sizeof (struct ip6_hdr) > IPV6_MAXPACKET) {
126 /* No jumbogram support. */
130 mtod(m, struct ip6_hdr *)->ip6_plen =
131 htons(m->m_pkthdr.len - sizeof(struct ip6_hdr));
135 DPRINTF(("%s: unknown protocol family %u\n", __func__,
136 saidx->dst.sa.sa_family));
142 * Add a record of what we've done or what needs to be done to the
145 mtag = m_tag_get(PACKET_TAG_IPSEC_OUT_DONE,
146 sizeof(struct tdb_ident), M_NOWAIT);
148 DPRINTF(("%s: could not get packet tag\n", __func__));
153 tdbi = (struct tdb_ident *)(mtag + 1);
154 tdbi->dst = saidx->dst;
155 tdbi->proto = saidx->proto;
156 tdbi->spi = sav->spi;
157 m_tag_prepend(m, mtag);
160 * If there's another (bundled) SA to apply, do so.
161 * Note that this puts a burden on the kernel stack size.
162 * If this is a problem we'll need to introduce a queue
163 * to set the packet on so we can unwind the stack before
164 * doing further processing.
167 V_ipsec4stat.ips_out_bundlesa++;
168 /* XXX-BZ currently only support same AF bundles. */
169 switch (saidx->dst.sa.sa_family) {
172 return ipsec4_process_packet(m, isr->next, 0, 0);
179 ipsec6_output_trans()
180 ipsec6_output_tunnel()
185 DPRINTF(("%s: unknown protocol family %u\n", __func__,
186 saidx->dst.sa.sa_family));
191 key_sa_recordxfer(sav, m); /* record data transfer */
196 * We're done with IPsec processing, transmit the packet using the
197 * appropriate network protocol (IP or IPv6). SPD lookup will be
198 * performed again there.
200 switch (saidx->dst.sa.sa_family) {
204 ip = mtod(m, struct ip *);
205 ip->ip_len = ntohs(ip->ip_len);
206 ip->ip_off = ntohs(ip->ip_off);
210 * If NAT-T is enabled, now that all IPsec processing is done
211 * insert UDP encapsulation header after IP header.
213 if (sav->natt_type) {
215 const int hlen = IP_VHL_HL(ip->ip_vhl);
217 const int hlen = (ip->ip_hl << 2);
223 size = sizeof(struct udphdr);
224 if (sav->natt_type == UDP_ENCAP_ESPINUDP_NON_IKE) {
226 * draft-ietf-ipsec-nat-t-ike-0[01].txt and
227 * draft-ietf-ipsec-udp-encaps-(00/)01.txt,
228 * ignoring possible AH mode
229 * non-IKE marker + non-ESP marker
230 * from draft-ietf-ipsec-udp-encaps-00.txt.
232 size += sizeof(u_int64_t);
234 mi = m_makespace(m, hlen, size, &off);
236 DPRINTF(("%s: m_makespace for udphdr failed\n",
242 udp = (struct udphdr *)(mtod(mi, caddr_t) + off);
243 if (sav->natt_type == UDP_ENCAP_ESPINUDP_NON_IKE)
244 udp->uh_sport = htons(UDP_ENCAP_ESPINUDP_PORT);
247 KEY_PORTFROMSADDR(&sav->sah->saidx.src);
248 udp->uh_dport = KEY_PORTFROMSADDR(&sav->sah->saidx.dst);
250 udp->uh_ulen = htons(m->m_pkthdr.len - hlen);
251 ip->ip_len = m->m_pkthdr.len;
252 ip->ip_p = IPPROTO_UDP;
254 if (sav->natt_type == UDP_ENCAP_ESPINUDP_NON_IKE)
255 *(u_int64_t *)(udp + 1) = 0;
257 #endif /* IPSEC_NAT_T */
259 return ip_output(m, NULL, NULL, IP_RAWOUTPUT, NULL, NULL);
264 * We don't need massage, IPv6 header fields are always in
267 return ip6_output(m, NULL, NULL, 0, NULL, NULL, NULL);
270 panic("ipsec_process_done");
276 static struct ipsecrequest *
279 struct ipsecrequest *isr,
281 struct secasindex *saidx,
285 #define IPSEC_OSTAT(x,y,z) (isr->saidx.proto == IPPROTO_ESP ? (x)++ : \
286 isr->saidx.proto == IPPROTO_AH ? (y)++ : (z)++)
287 struct secasvar *sav;
289 IPSECREQUEST_LOCK_ASSERT(isr);
291 IPSEC_ASSERT(af == AF_INET || af == AF_INET6,
292 ("invalid address family %u", af));
295 * Craft SA index to search for proper SA. Note that
296 * we only fillin unspecified SA peers for transport
297 * mode; for tunnel mode they must already be filled in.
300 if (isr->saidx.mode == IPSEC_MODE_TRANSPORT) {
301 /* Fillin unspecified SA peers only for transport mode */
303 struct sockaddr_in *sin;
304 struct ip *ip = mtod(m, struct ip *);
306 if (saidx->src.sa.sa_len == 0) {
307 sin = &saidx->src.sin;
308 sin->sin_len = sizeof(*sin);
309 sin->sin_family = AF_INET;
310 sin->sin_port = IPSEC_PORT_ANY;
311 sin->sin_addr = ip->ip_src;
313 if (saidx->dst.sa.sa_len == 0) {
314 sin = &saidx->dst.sin;
315 sin->sin_len = sizeof(*sin);
316 sin->sin_family = AF_INET;
317 sin->sin_port = IPSEC_PORT_ANY;
318 sin->sin_addr = ip->ip_dst;
321 struct sockaddr_in6 *sin6;
322 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
324 if (saidx->src.sin6.sin6_len == 0) {
325 sin6 = (struct sockaddr_in6 *)&saidx->src;
326 sin6->sin6_len = sizeof(*sin6);
327 sin6->sin6_family = AF_INET6;
328 sin6->sin6_port = IPSEC_PORT_ANY;
329 sin6->sin6_addr = ip6->ip6_src;
330 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src)) {
331 /* fix scope id for comparing SPD */
332 sin6->sin6_addr.s6_addr16[1] = 0;
333 sin6->sin6_scope_id =
334 ntohs(ip6->ip6_src.s6_addr16[1]);
337 if (saidx->dst.sin6.sin6_len == 0) {
338 sin6 = (struct sockaddr_in6 *)&saidx->dst;
339 sin6->sin6_len = sizeof(*sin6);
340 sin6->sin6_family = AF_INET6;
341 sin6->sin6_port = IPSEC_PORT_ANY;
342 sin6->sin6_addr = ip6->ip6_dst;
343 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
344 /* fix scope id for comparing SPD */
345 sin6->sin6_addr.s6_addr16[1] = 0;
346 sin6->sin6_scope_id =
347 ntohs(ip6->ip6_dst.s6_addr16[1]);
354 * Lookup SA and validate it.
356 *error = key_checkrequest(isr, saidx);
359 * IPsec processing is required, but no SA found.
360 * I assume that key_acquire() had been called
361 * to get/establish the SA. Here I discard
362 * this packet because it is responsibility for
363 * upper layer to retransmit the packet.
365 V_ipsec4stat.ips_out_nosa++;
370 IPSEC_ASSERT(ipsec_get_reqlevel(isr) == IPSEC_LEVEL_USE,
371 ("no SA found, but required; level %u",
372 ipsec_get_reqlevel(isr)));
373 IPSECREQUEST_UNLOCK(isr);
376 * If isr is NULL, we found a 'use' policy w/o SA.
377 * Return w/o error and w/o isr so we can drop out
378 * and continue w/o IPsec processing.
382 IPSECREQUEST_LOCK(isr);
387 * Check system global policy controls.
389 if ((isr->saidx.proto == IPPROTO_ESP && !V_esp_enable) ||
390 (isr->saidx.proto == IPPROTO_AH && !V_ah_enable) ||
391 (isr->saidx.proto == IPPROTO_IPCOMP && !V_ipcomp_enable)) {
392 DPRINTF(("%s: IPsec outbound packet dropped due"
393 " to policy (check your sysctls)\n", __func__));
394 IPSEC_OSTAT(V_espstat.esps_pdrops, V_ahstat.ahs_pdrops,
395 V_ipcompstat.ipcomps_pdrops);
396 *error = EHOSTUNREACH;
401 * Sanity check the SA contents for the caller
402 * before they invoke the xform output method.
404 if (sav->tdb_xform == NULL) {
405 DPRINTF(("%s: no transform for SA\n", __func__));
406 IPSEC_OSTAT(V_espstat.esps_noxform, V_ahstat.ahs_noxform,
407 V_ipcompstat.ipcomps_noxform);
408 *error = EHOSTUNREACH;
413 IPSEC_ASSERT(*error != 0, ("error return w/ no error code"));
414 IPSECREQUEST_UNLOCK(isr);
421 * IPsec output logic for IPv4.
424 ipsec4_process_packet(
426 struct ipsecrequest *isr,
430 struct secasindex saidx;
431 struct secasvar *sav;
435 IPSEC_ASSERT(m != NULL, ("null mbuf"));
436 IPSEC_ASSERT(isr != NULL, ("null isr"));
438 IPSECREQUEST_LOCK(isr); /* insure SA contents don't change */
440 isr = ipsec_nextisr(m, isr, AF_INET, &saidx, &error);
450 encif->if_opackets++;
451 encif->if_obytes += m->m_pkthdr.len;
453 /* pass the mbuf to enc0 for bpf processing */
454 ipsec_bpf(m, sav, AF_INET, ENC_OUT|ENC_BEFORE);
455 /* pass the mbuf to enc0 for packet filtering */
456 if ((error = ipsec_filter(&m, PFIL_OUT, ENC_OUT|ENC_BEFORE)) != 0)
461 union sockaddr_union *dst = &sav->sah->saidx.dst;
465 * Collect IP_DF state from the outer header.
467 if (dst->sa.sa_family == AF_INET) {
468 if (m->m_len < sizeof (struct ip) &&
469 (m = m_pullup(m, sizeof (struct ip))) == NULL) {
473 ip = mtod(m, struct ip *);
474 /* Honor system-wide control of how to handle IP_DF */
475 switch (V_ip4_ipsec_dfbit) {
476 case 0: /* clear in outer header */
477 case 1: /* set in outer header */
478 setdf = V_ip4_ipsec_dfbit;
480 default: /* propagate to outer header */
481 setdf = ntohs(ip->ip_off & IP_DF);
485 ip = NULL; /* keep compiler happy */
488 /* Do the appropriate encapsulation, if necessary */
489 if (isr->saidx.mode == IPSEC_MODE_TUNNEL || /* Tunnel requ'd */
490 dst->sa.sa_family != AF_INET || /* PF mismatch */
492 (sav->flags & SADB_X_SAFLAGS_TUNNEL) || /* Tunnel requ'd */
493 sav->tdb_xform->xf_type == XF_IP4 || /* ditto */
495 (dst->sa.sa_family == AF_INET && /* Proxy */
496 dst->sin.sin_addr.s_addr != INADDR_ANY &&
497 dst->sin.sin_addr.s_addr != ip->ip_dst.s_addr)) {
500 /* Fix IPv4 header checksum and length */
501 if (m->m_len < sizeof (struct ip) &&
502 (m = m_pullup(m, sizeof (struct ip))) == NULL) {
506 ip = mtod(m, struct ip *);
507 ip->ip_len = htons(m->m_pkthdr.len);
510 if (ip->ip_vhl == IP_VHL_BORING)
511 ip->ip_sum = in_cksum_hdr(ip);
513 ip->ip_sum = in_cksum(m,
514 _IP_VHL_HL(ip->ip_vhl) << 2);
516 ip->ip_sum = in_cksum(m, ip->ip_hl << 2);
519 /* Encapsulate the packet */
520 error = ipip_output(m, isr, &mp, 0, 0);
521 if (mp == NULL && !error) {
522 /* Should never happen. */
523 DPRINTF(("%s: ipip_output returns no mbuf and "
524 "no error!", __func__));
529 /* XXX: Should never happen! */
532 m = NULL; /* ipip_output() already freed it */
537 * ipip_output clears IP_DF in the new header. If
538 * we need to propagate IP_DF from the outer header,
539 * then we have to do it here.
541 * XXX shouldn't assume what ipip_output does.
543 if (dst->sa.sa_family == AF_INET && setdf) {
544 if (m->m_len < sizeof (struct ip) &&
545 (m = m_pullup(m, sizeof (struct ip))) == NULL) {
549 ip = mtod(m, struct ip *);
550 ip->ip_off = ntohs(ip->ip_off);
552 ip->ip_off = htons(ip->ip_off);
558 /* pass the mbuf to enc0 for bpf processing */
559 ipsec_bpf(m, sav, AF_INET, ENC_OUT|ENC_AFTER);
560 /* pass the mbuf to enc0 for packet filtering */
561 if ((error = ipsec_filter(&m, PFIL_OUT, ENC_OUT|ENC_AFTER)) != 0)
566 * Dispatch to the appropriate IPsec transform logic. The
567 * packet will be returned for transmission after crypto
568 * processing, etc. are completed. For encapsulation we
569 * bypass this call because of the explicit call done above
570 * (necessary to deal with IP_DF handling for IPv4).
572 * NB: m & sav are ``passed to caller'' who's reponsible for
573 * for reclaiming their resources.
575 if (sav->tdb_xform->xf_type != XF_IP4) {
576 ip = mtod(m, struct ip *);
578 off = offsetof(struct ip, ip_p);
579 error = (*sav->tdb_xform->xf_output)(m, isr, NULL, i, off);
581 error = ipsec_process_done(m, isr);
583 IPSECREQUEST_UNLOCK(isr);
587 IPSECREQUEST_UNLOCK(isr);
596 * Chop IP6 header from the payload.
599 ipsec6_splithdr(struct mbuf *m)
605 IPSEC_ASSERT(m->m_len >= sizeof (struct ip6_hdr),
606 ("first mbuf too short, len %u", m->m_len));
607 ip6 = mtod(m, struct ip6_hdr *);
608 hlen = sizeof(struct ip6_hdr);
609 if (m->m_len > hlen) {
610 MGETHDR(mh, M_DONTWAIT, MT_DATA);
615 M_MOVE_PKTHDR(mh, m);
622 bcopy((caddr_t)ip6, mtod(m, caddr_t), hlen);
623 } else if (m->m_len < hlen) {
624 m = m_pullup(m, hlen);
632 * IPsec output logic for IPv6, transport mode.
636 struct ipsec_output_state *state,
639 struct secpolicy *sp,
643 struct ipsecrequest *isr;
644 struct secasindex saidx;
648 IPSEC_ASSERT(state != NULL, ("null state"));
649 IPSEC_ASSERT(state->m != NULL, ("null m"));
650 IPSEC_ASSERT(nexthdrp != NULL, ("null nexthdrp"));
651 IPSEC_ASSERT(mprev != NULL, ("null mprev"));
652 IPSEC_ASSERT(sp != NULL, ("null sp"));
653 IPSEC_ASSERT(tun != NULL, ("null tun"));
655 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
656 printf("%s: applied SP\n", __func__);
657 kdebug_secpolicy(sp));
660 if (isr->saidx.mode == IPSEC_MODE_TUNNEL) {
661 /* the rest will be handled by ipsec6_output_tunnel() */
662 *tun = 1; /* need tunnel-mode processing */
669 IPSECREQUEST_LOCK(isr); /* insure SA contents don't change */
670 isr = ipsec_nextisr(m, isr, AF_INET6, &saidx, &error);
674 /* XXX should notification be done for all errors ? */
676 * Notify the fact that the packet is discarded
677 * to ourselves. I believe this is better than
678 * just silently discarding. (jinmei@kame.net)
679 * XXX: should we restrict the error to TCP packets?
680 * XXX: should we directly notify sockets via
683 icmp6_error(m, ICMP6_DST_UNREACH,
684 ICMP6_DST_UNREACH_ADMIN, 0);
685 m = NULL; /* NB: icmp6_error frees mbuf */
692 error = (*isr->sav->tdb_xform->xf_output)(m, isr, NULL,
693 sizeof (struct ip6_hdr),
694 offsetof(struct ip6_hdr,
696 IPSECREQUEST_UNLOCK(isr);
700 IPSECREQUEST_UNLOCK(isr);
708 ipsec6_encapsulate(struct mbuf *m, struct secasvar *sav)
710 struct ip6_hdr *oip6;
714 /* can't tunnel between different AFs */
715 if (sav->sah->saidx.src.sa.sa_family != AF_INET6 ||
716 sav->sah->saidx.dst.sa.sa_family != AF_INET6) {
720 IPSEC_ASSERT(m->m_len == sizeof (struct ip6_hdr),
721 ("mbuf wrong size; len %u", m->m_len));
725 * grow the mbuf to accomodate the new IPv6 header.
727 plen = m->m_pkthdr.len;
728 if (M_LEADINGSPACE(m->m_next) < sizeof(struct ip6_hdr)) {
730 MGET(n, M_DONTWAIT, MT_DATA);
735 n->m_len = sizeof(struct ip6_hdr);
736 n->m_next = m->m_next;
738 m->m_pkthdr.len += sizeof(struct ip6_hdr);
739 oip6 = mtod(n, struct ip6_hdr *);
741 m->m_next->m_len += sizeof(struct ip6_hdr);
742 m->m_next->m_data -= sizeof(struct ip6_hdr);
743 m->m_pkthdr.len += sizeof(struct ip6_hdr);
744 oip6 = mtod(m->m_next, struct ip6_hdr *);
746 ip6 = mtod(m, struct ip6_hdr *);
747 bcopy((caddr_t)ip6, (caddr_t)oip6, sizeof(struct ip6_hdr));
749 /* Fake link-local scope-class addresses */
750 if (IN6_IS_SCOPE_LINKLOCAL(&oip6->ip6_src))
751 oip6->ip6_src.s6_addr16[1] = 0;
752 if (IN6_IS_SCOPE_LINKLOCAL(&oip6->ip6_dst))
753 oip6->ip6_dst.s6_addr16[1] = 0;
755 /* construct new IPv6 header. see RFC 2401 5.1.2.2 */
756 /* ECN consideration. */
757 ip6_ecn_ingress(V_ip6_ipsec_ecn, &ip6->ip6_flow, &oip6->ip6_flow);
758 if (plen < IPV6_MAXPACKET - sizeof(struct ip6_hdr))
759 ip6->ip6_plen = htons(plen);
761 /* ip6->ip6_plen will be updated in ip6_output() */
763 ip6->ip6_nxt = IPPROTO_IPV6;
764 ip6->ip6_src = sav->sah->saidx.src.sin6.sin6_addr;
765 ip6->ip6_dst = sav->sah->saidx.dst.sin6.sin6_addr;
766 ip6->ip6_hlim = IPV6_DEFHLIM;
768 /* XXX Should ip6_src be updated later ? */
774 * IPsec output logic for IPv6, tunnel mode.
777 ipsec6_output_tunnel(struct ipsec_output_state *state, struct secpolicy *sp, int flags)
780 struct ipsecrequest *isr;
781 struct secasindex saidx;
783 struct sockaddr_in6 *dst6;
786 IPSEC_ASSERT(state != NULL, ("null state"));
787 IPSEC_ASSERT(state->m != NULL, ("null m"));
788 IPSEC_ASSERT(sp != NULL, ("null sp"));
790 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
791 printf("%s: applied SP\n", __func__);
792 kdebug_secpolicy(sp));
796 * transport mode ipsec (before the 1st tunnel mode) is already
797 * processed by ipsec6_output_trans().
799 for (isr = sp->req; isr; isr = isr->next) {
800 if (isr->saidx.mode == IPSEC_MODE_TUNNEL)
804 IPSECREQUEST_LOCK(isr); /* insure SA contents don't change */
805 isr = ipsec_nextisr(m, isr, AF_INET6, &saidx, &error);
813 encif->if_opackets++;
814 encif->if_obytes += m->m_pkthdr.len;
816 /* pass the mbuf to enc0 for bpf processing */
817 ipsec_bpf(m, isr->sav, AF_INET6, ENC_OUT|ENC_BEFORE);
818 /* pass the mbuf to enc0 for packet filtering */
819 if ((error = ipsec_filter(&m, PFIL_OUT, ENC_OUT|ENC_BEFORE)) != 0)
824 * There may be the case that SA status will be changed when
825 * we are refering to one. So calling splsoftnet().
827 if (isr->saidx.mode == IPSEC_MODE_TUNNEL) {
829 * build IPsec tunnel.
831 /* XXX should be processed with other familiy */
832 if (isr->sav->sah->saidx.src.sa.sa_family != AF_INET6) {
833 ipseclog((LOG_ERR, "%s: family mismatched between "
834 "inner and outer, spi=%u\n", __func__,
835 ntohl(isr->sav->spi)));
836 V_ipsec6stat.ips_out_inval++;
837 error = EAFNOSUPPORT;
841 m = ipsec6_splithdr(m);
843 V_ipsec6stat.ips_out_nomem++;
847 error = ipsec6_encapsulate(m, isr->sav);
852 ip6 = mtod(m, struct ip6_hdr *);
855 (struct route *)&isr->sav->sah->route_cache.sin6_route;
856 state->dst = (struct sockaddr *)&state->ro->ro_dst;
857 dst6 = (struct sockaddr_in6 *)state->dst;
859 && ((state->ro->ro_rt->rt_flags & RTF_UP) == 0
860 || !IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, &ip6->ip6_dst))) {
861 RTFREE(state->ro->ro_rt);
862 state->ro->ro_rt = NULL;
864 if (state->ro->ro_rt == NULL) {
865 bzero(dst6, sizeof(*dst6));
866 dst6->sin6_family = AF_INET6;
867 dst6->sin6_len = sizeof(*dst6);
868 dst6->sin6_addr = ip6->ip6_dst;
869 rtalloc_ign_fib(state->ro, 0UL, M_GETFIB(m));
871 if (state->ro->ro_rt == NULL) {
872 V_ip6stat.ip6s_noroute++;
873 V_ipsec6stat.ips_out_noroute++;
874 error = EHOSTUNREACH;
878 /* adjust state->dst if tunnel endpoint is offlink */
879 if (state->ro->ro_rt->rt_flags & RTF_GATEWAY)
880 state->dst = (struct sockaddr *)state->ro->ro_rt->rt_gateway;
883 m = ipsec6_splithdr(m);
885 V_ipsec6stat.ips_out_nomem++;
889 ip6 = mtod(m, struct ip6_hdr *);
892 /* pass the mbuf to enc0 for bpf processing */
893 ipsec_bpf(m, isr->sav, AF_INET6, ENC_OUT|ENC_AFTER);
894 /* pass the mbuf to enc0 for packet filtering */
895 if ((error = ipsec_filter(&m, PFIL_OUT, ENC_OUT|ENC_AFTER)) != 0)
899 error = (*isr->sav->tdb_xform->xf_output)(m, isr, NULL,
900 sizeof (struct ip6_hdr),
901 offsetof(struct ip6_hdr, ip6_nxt));
902 IPSECREQUEST_UNLOCK(isr);
906 IPSECREQUEST_UNLOCK(isr);