1 /* $FreeBSD: src/sys/netinet6/esp_input.c,v 1.1.2.8 2003/01/23 21:06:47 sam Exp $ */
2 /* $KAME: esp_input.c,v 1.62 2002/01/07 11:39:57 kjc Exp $ */
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
34 * RFC1827/2406 Encapsulated Security Payload.
38 #include "opt_inet6.h"
40 #include <sys/param.h>
41 #include <sys/systm.h>
43 #include <sys/domain.h>
44 #include <sys/protosw.h>
45 #include <sys/socket.h>
46 #include <sys/errno.h>
48 #include <sys/syslog.h>
50 #include <sys/thread2.h>
51 #include <sys/msgport2.h>
54 #include <net/route.h>
55 #include <net/netisr.h>
56 #include <machine/cpu.h>
58 #include <netinet/in.h>
59 #include <netinet/in_systm.h>
60 #include <netinet/ip.h>
61 #include <netinet/ip_var.h>
62 #include <netinet/in_var.h>
63 #include <netinet/ip_ecn.h>
65 #include <netinet6/ip6_ecn.h>
69 #include <netinet/ip6.h>
70 #include <netinet6/in6_pcb.h>
71 #include <netinet6/ip6_var.h>
72 #include <netinet/icmp6.h>
73 #include <netinet6/ip6protosw.h>
76 #include <netinet6/ipsec.h>
78 #include <netinet6/ipsec6.h>
80 #include <netinet6/ah.h>
82 #include <netinet6/ah6.h>
84 #include <netinet6/esp.h>
86 #include <netinet6/esp6.h>
88 #include <netproto/key/key.h>
89 #include <netproto/key/keydb.h>
90 #include <netproto/key/key_debug.h>
92 #include <machine/stdarg.h>
94 #include <net/net_osdep.h>
99 (sizeof(struct esp) < sizeof(struct newesp) \
100 ? sizeof(struct newesp) : sizeof(struct esp))
103 extern struct protosw inetsw
[];
106 esp4_input(struct mbuf
**mp
, int *offp
, int proto
)
111 struct esptail esptail
;
114 struct secasvar
*sav
= NULL
;
117 const struct esp_algorithm
*algo
;
125 /* sanity check for alignment. */
126 if (off
% 4 != 0 || m
->m_pkthdr
.len
% 4 != 0) {
127 ipseclog((LOG_ERR
, "IPv4 ESP input: packet alignment problem "
128 "(off=%d, pktlen=%d)\n", off
, m
->m_pkthdr
.len
));
129 ipsecstat
.in_inval
++;
133 if (m
->m_len
< off
+ ESPMAXLEN
) {
134 m
= m_pullup(m
, off
+ ESPMAXLEN
);
137 "IPv4 ESP input: can't pullup in esp4_input\n"));
138 ipsecstat
.in_inval
++;
143 ip
= mtod(m
, struct ip
*);
144 esp
= (struct esp
*)(((u_int8_t
*)ip
) + off
);
146 /* find the sassoc. */
149 if ((sav
= key_allocsa(AF_INET
,
150 (caddr_t
)&ip
->ip_src
, (caddr_t
)&ip
->ip_dst
,
151 IPPROTO_ESP
, spi
)) == NULL
) {
152 ipseclog((LOG_WARNING
,
153 "IPv4 ESP input: no key association found for spi %u\n",
154 (u_int32_t
)ntohl(spi
)));
158 KEYDEBUG(KEYDEBUG_IPSEC_STAMP
,
159 kprintf("DP esp4_input called to allocate SA:%p\n", sav
));
160 if (sav
->state
!= SADB_SASTATE_MATURE
161 && sav
->state
!= SADB_SASTATE_DYING
) {
163 "IPv4 ESP input: non-mature/dying SA found for spi %u\n",
164 (u_int32_t
)ntohl(spi
)));
165 ipsecstat
.in_badspi
++;
168 algo
= esp_algorithm_lookup(sav
->alg_enc
);
170 ipseclog((LOG_DEBUG
, "IPv4 ESP input: "
171 "unsupported encryption algorithm for spi %u\n",
172 (u_int32_t
)ntohl(spi
)));
173 ipsecstat
.in_badspi
++;
177 /* check if we have proper ivlen information */
180 ipseclog((LOG_ERR
, "improper ivlen in IPv4 ESP input: %s %s\n",
181 ipsec4_logpacketstr(ip
, spi
), ipsec_logsastr(sav
)));
182 ipsecstat
.in_inval
++;
186 if (!((sav
->flags
& SADB_X_EXT_OLD
) == 0 && sav
->replay
187 && (sav
->alg_auth
&& sav
->key_auth
)))
190 if (sav
->alg_auth
== SADB_X_AALG_NULL
||
191 sav
->alg_auth
== SADB_AALG_NONE
)
195 * check for sequence number.
197 if (ipsec_chkreplay(ntohl(((struct newesp
*)esp
)->esp_seq
), sav
))
200 ipsecstat
.in_espreplay
++;
201 ipseclog((LOG_WARNING
,
202 "replay packet in IPv4 ESP input: %s %s\n",
203 ipsec4_logpacketstr(ip
, spi
), ipsec_logsastr(sav
)));
209 u_char sum0
[AH_MAXSUMSIZE
];
210 u_char sum
[AH_MAXSUMSIZE
];
211 const struct ah_algorithm
*sumalgo
;
214 sumalgo
= ah_algorithm_lookup(sav
->alg_auth
);
217 siz
= (((*sumalgo
->sumsiz
)(sav
) + 3) & ~(4 - 1));
218 if (m
->m_pkthdr
.len
< off
+ ESPMAXLEN
+ siz
) {
219 ipsecstat
.in_inval
++;
222 if (AH_MAXSUMSIZE
< siz
) {
224 "internal error: AH_MAXSUMSIZE must be larger than %lu\n",
226 ipsecstat
.in_inval
++;
230 m_copydata(m
, m
->m_pkthdr
.len
- siz
, siz
, &sum0
[0]);
232 if (esp_auth(m
, off
, m
->m_pkthdr
.len
- off
- siz
, sav
, sum
)) {
233 ipseclog((LOG_WARNING
, "auth fail in IPv4 ESP input: %s %s\n",
234 ipsec4_logpacketstr(ip
, spi
), ipsec_logsastr(sav
)));
235 ipsecstat
.in_espauthfail
++;
239 if (bcmp(sum0
, sum
, siz
) != 0) {
240 ipseclog((LOG_WARNING
, "auth fail in IPv4 ESP input: %s %s\n",
241 ipsec4_logpacketstr(ip
, spi
), ipsec_logsastr(sav
)));
242 ipsecstat
.in_espauthfail
++;
246 /* strip off the authentication data */
248 ip
= mtod(m
, struct ip
*);
250 ip
->ip_len
= ip
->ip_len
- siz
;
252 ip
->ip_len
= htons(ntohs(ip
->ip_len
) - siz
);
254 m
->m_flags
|= M_AUTHIPDGM
;
255 ipsecstat
.in_espauthsucc
++;
259 * update sequence number.
261 if ((sav
->flags
& SADB_X_EXT_OLD
) == 0 && sav
->replay
) {
262 if (ipsec_updatereplay(ntohl(((struct newesp
*)esp
)->esp_seq
), sav
)) {
263 ipsecstat
.in_espreplay
++;
270 /* process main esp header. */
271 if (sav
->flags
& SADB_X_EXT_OLD
) {
273 esplen
= sizeof(struct esp
);
276 if (sav
->flags
& SADB_X_EXT_DERIV
)
277 esplen
= sizeof(struct esp
);
279 esplen
= sizeof(struct newesp
);
282 if (m
->m_pkthdr
.len
< off
+ esplen
+ ivlen
+ sizeof(esptail
)) {
283 ipseclog((LOG_WARNING
,
284 "IPv4 ESP input: packet too short\n"));
285 ipsecstat
.in_inval
++;
289 if (m
->m_len
< off
+ esplen
+ ivlen
) {
290 m
= m_pullup(m
, off
+ esplen
+ ivlen
);
293 "IPv4 ESP input: can't pullup in esp4_input\n"));
294 ipsecstat
.in_inval
++;
300 * pre-compute and cache intermediate key
302 if (esp_schedule(algo
, sav
) != 0) {
303 ipsecstat
.in_inval
++;
308 * decrypt the packet.
311 panic("internal error: no decrypt function");
312 if ((*algo
->decrypt
)(m
, off
, sav
, algo
, ivlen
)) {
313 /* m is already freed */
315 ipseclog((LOG_ERR
, "decrypt fail in IPv4 ESP input: %s\n",
316 ipsec_logsastr(sav
)));
317 ipsecstat
.in_inval
++;
320 ipsecstat
.in_esphist
[sav
->alg_enc
]++;
322 m
->m_flags
|= M_DECRYPTED
;
325 * find the trailer of the ESP.
327 m_copydata(m
, m
->m_pkthdr
.len
- sizeof(esptail
), sizeof(esptail
),
329 nxt
= esptail
.esp_nxt
;
330 taillen
= esptail
.esp_padlen
+ sizeof(esptail
);
332 if (m
->m_pkthdr
.len
< taillen
||
333 m
->m_pkthdr
.len
- taillen
< off
+ esplen
+ ivlen
+ sizeof(esptail
)) {
334 ipseclog((LOG_WARNING
,
335 "bad pad length in IPv4 ESP input: %s %s\n",
336 ipsec4_logpacketstr(ip
, spi
), ipsec_logsastr(sav
)));
337 ipsecstat
.in_inval
++;
341 /* strip off the trailing pad area. */
345 ip
->ip_len
= ip
->ip_len
- taillen
;
347 ip
->ip_len
= htons(ntohs(ip
->ip_len
) - taillen
);
350 /* was it transmitted over the IPsec tunnel SA? */
351 if (ipsec4_tunnel_validate(m
, off
+ esplen
+ ivlen
, nxt
, sav
)) {
353 * strip off all the headers that precedes ESP header.
354 * IP4 xx ESP IP4' payload -> IP4' payload
356 * XXX more sanity checks
357 * XXX relationship with gif?
362 m_adj(m
, off
+ esplen
+ ivlen
);
363 if (m
->m_len
< sizeof(*ip
)) {
364 m
= m_pullup(m
, sizeof(*ip
));
366 ipsecstat
.in_inval
++;
370 ip
= mtod(m
, struct ip
*);
371 /* ECN consideration. */
372 ip_ecn_egress(ip4_ipsec_ecn
, &tos
, &ip
->ip_tos
);
373 if (!key_checktunnelsanity(sav
, AF_INET
,
374 (caddr_t
)&ip
->ip_src
, (caddr_t
)&ip
->ip_dst
)) {
375 ipseclog((LOG_ERR
, "ipsec tunnel address mismatch "
376 "in IPv4 ESP input: %s %s\n",
377 ipsec4_logpacketstr(ip
, spi
), ipsec_logsastr(sav
)));
378 ipsecstat
.in_inval
++;
382 key_sa_recordxfer(sav
, m
);
383 if (ipsec_addhist(m
, IPPROTO_ESP
, spi
) != 0 ||
384 ipsec_addhist(m
, IPPROTO_IPV4
, 0) != 0) {
385 ipsecstat
.in_nomem
++;
389 if (netisr_queue(NETISR_IP
, m
)) {
390 ipsecstat
.in_inval
++;
398 * strip off ESP header and IV.
399 * even in m_pulldown case, we need to strip off ESP so that
400 * we can always compute checksum for AH correctly.
404 stripsiz
= esplen
+ ivlen
;
406 ip
= mtod(m
, struct ip
*);
407 bcopy((caddr_t
)ip
, (caddr_t
)(((u_char
*)ip
) + stripsiz
), off
);
408 m
->m_data
+= stripsiz
;
409 m
->m_len
-= stripsiz
;
410 m
->m_pkthdr
.len
-= stripsiz
;
412 ip
= mtod(m
, struct ip
*);
414 ip
->ip_len
= ip
->ip_len
- stripsiz
;
416 ip
->ip_len
= htons(ntohs(ip
->ip_len
) - stripsiz
);
420 key_sa_recordxfer(sav
, m
);
421 if (ipsec_addhist(m
, IPPROTO_ESP
, spi
) != 0) {
422 ipsecstat
.in_nomem
++;
426 if (nxt
!= IPPROTO_DONE
) {
427 if ((inetsw
[ip_protox
[nxt
]].pr_flags
& PR_LASTHDR
) &&
428 ipsec4_in_reject(m
, NULL
)) {
429 ipsecstat
.in_polvio
++;
432 if (!ip_lengthcheck(&m
, 0)) {
433 /* freed in ip_lengthcheck() */
438 (*inetsw
[ip_protox
[nxt
]].pr_input
)(mp
, offp
, nxt
);
446 KEYDEBUG(KEYDEBUG_IPSEC_STAMP
,
447 kprintf("DP esp4_input call free SA:%p\n", sav
));
450 ipsecstat
.in_success
++;
451 return(IPPROTO_DONE
);
455 KEYDEBUG(KEYDEBUG_IPSEC_STAMP
,
456 kprintf("DP esp4_input call free SA:%p\n", sav
));
461 return(IPPROTO_DONE
);
467 esp6_input(struct mbuf
**mp
, int *offp
, int proto
)
469 struct mbuf
*m
= *mp
;
473 struct esptail esptail
;
475 struct secasvar
*sav
= NULL
;
478 const struct esp_algorithm
*algo
;
482 /* sanity check for alignment. */
483 if (off
% 4 != 0 || m
->m_pkthdr
.len
% 4 != 0) {
484 ipseclog((LOG_ERR
, "IPv6 ESP input: packet alignment problem "
485 "(off=%d, pktlen=%d)\n", off
, m
->m_pkthdr
.len
));
486 ipsec6stat
.in_inval
++;
490 #ifndef PULLDOWN_TEST
491 IP6_EXTHDR_CHECK(m
, off
, ESPMAXLEN
, IPPROTO_DONE
);
492 esp
= (struct esp
*)(mtod(m
, caddr_t
) + off
);
494 IP6_EXTHDR_GET(esp
, struct esp
*, m
, off
, ESPMAXLEN
);
496 ipsec6stat
.in_inval
++;
500 ip6
= mtod(m
, struct ip6_hdr
*);
502 if (ntohs(ip6
->ip6_plen
) == 0) {
503 ipseclog((LOG_ERR
, "IPv6 ESP input: "
504 "ESP with IPv6 jumbogram is not supported.\n"));
505 ipsec6stat
.in_inval
++;
509 /* find the sassoc. */
512 if ((sav
= key_allocsa(AF_INET6
,
513 (caddr_t
)&ip6
->ip6_src
, (caddr_t
)&ip6
->ip6_dst
,
514 IPPROTO_ESP
, spi
)) == NULL
) {
515 ipseclog((LOG_WARNING
,
516 "IPv6 ESP input: no key association found for spi %u\n",
517 (u_int32_t
)ntohl(spi
)));
518 ipsec6stat
.in_nosa
++;
521 KEYDEBUG(KEYDEBUG_IPSEC_STAMP
,
522 kprintf("DP esp6_input called to allocate SA:%p\n", sav
));
523 if (sav
->state
!= SADB_SASTATE_MATURE
524 && sav
->state
!= SADB_SASTATE_DYING
) {
526 "IPv6 ESP input: non-mature/dying SA found for spi %u\n",
527 (u_int32_t
)ntohl(spi
)));
528 ipsec6stat
.in_badspi
++;
531 algo
= esp_algorithm_lookup(sav
->alg_enc
);
533 ipseclog((LOG_DEBUG
, "IPv6 ESP input: "
534 "unsupported encryption algorithm for spi %u\n",
535 (u_int32_t
)ntohl(spi
)));
536 ipsec6stat
.in_badspi
++;
540 /* check if we have proper ivlen information */
543 ipseclog((LOG_ERR
, "improper ivlen in IPv6 ESP input: %s %s\n",
544 ipsec6_logpacketstr(ip6
, spi
), ipsec_logsastr(sav
)));
545 ipsec6stat
.in_badspi
++;
549 if (!((sav
->flags
& SADB_X_EXT_OLD
) == 0 && sav
->replay
550 && (sav
->alg_auth
&& sav
->key_auth
)))
553 if (sav
->alg_auth
== SADB_X_AALG_NULL
||
554 sav
->alg_auth
== SADB_AALG_NONE
)
558 * check for sequence number.
560 if (ipsec_chkreplay(ntohl(((struct newesp
*)esp
)->esp_seq
), sav
))
563 ipsec6stat
.in_espreplay
++;
564 ipseclog((LOG_WARNING
,
565 "replay packet in IPv6 ESP input: %s %s\n",
566 ipsec6_logpacketstr(ip6
, spi
), ipsec_logsastr(sav
)));
572 u_char sum0
[AH_MAXSUMSIZE
];
573 u_char sum
[AH_MAXSUMSIZE
];
574 const struct ah_algorithm
*sumalgo
;
577 sumalgo
= ah_algorithm_lookup(sav
->alg_auth
);
580 siz
= (((*sumalgo
->sumsiz
)(sav
) + 3) & ~(4 - 1));
581 if (m
->m_pkthdr
.len
< off
+ ESPMAXLEN
+ siz
) {
582 ipsec6stat
.in_inval
++;
585 if (AH_MAXSUMSIZE
< siz
) {
587 "internal error: AH_MAXSUMSIZE must be larger than %lu\n",
589 ipsec6stat
.in_inval
++;
593 m_copydata(m
, m
->m_pkthdr
.len
- siz
, siz
, &sum0
[0]);
595 if (esp_auth(m
, off
, m
->m_pkthdr
.len
- off
- siz
, sav
, sum
)) {
596 ipseclog((LOG_WARNING
, "auth fail in IPv6 ESP input: %s %s\n",
597 ipsec6_logpacketstr(ip6
, spi
), ipsec_logsastr(sav
)));
598 ipsec6stat
.in_espauthfail
++;
602 if (bcmp(sum0
, sum
, siz
) != 0) {
603 ipseclog((LOG_WARNING
, "auth fail in IPv6 ESP input: %s %s\n",
604 ipsec6_logpacketstr(ip6
, spi
), ipsec_logsastr(sav
)));
605 ipsec6stat
.in_espauthfail
++;
609 /* strip off the authentication data */
611 ip6
= mtod(m
, struct ip6_hdr
*);
612 ip6
->ip6_plen
= htons(ntohs(ip6
->ip6_plen
) - siz
);
614 m
->m_flags
|= M_AUTHIPDGM
;
615 ipsec6stat
.in_espauthsucc
++;
619 * update sequence number.
621 if ((sav
->flags
& SADB_X_EXT_OLD
) == 0 && sav
->replay
) {
622 if (ipsec_updatereplay(ntohl(((struct newesp
*)esp
)->esp_seq
), sav
)) {
623 ipsec6stat
.in_espreplay
++;
630 /* process main esp header. */
631 if (sav
->flags
& SADB_X_EXT_OLD
) {
633 esplen
= sizeof(struct esp
);
636 if (sav
->flags
& SADB_X_EXT_DERIV
)
637 esplen
= sizeof(struct esp
);
639 esplen
= sizeof(struct newesp
);
642 if (m
->m_pkthdr
.len
< off
+ esplen
+ ivlen
+ sizeof(esptail
)) {
643 ipseclog((LOG_WARNING
,
644 "IPv6 ESP input: packet too short\n"));
645 ipsec6stat
.in_inval
++;
649 #ifndef PULLDOWN_TEST
650 IP6_EXTHDR_CHECK(m
, off
, esplen
+ ivlen
, IPPROTO_DONE
); /* XXX */
652 IP6_EXTHDR_GET(esp
, struct esp
*, m
, off
, esplen
+ ivlen
);
654 ipsec6stat
.in_inval
++;
659 ip6
= mtod(m
, struct ip6_hdr
*); /* set it again just in case */
662 * pre-compute and cache intermediate key
664 if (esp_schedule(algo
, sav
) != 0) {
665 ipsec6stat
.in_inval
++;
670 * decrypt the packet.
673 panic("internal error: no decrypt function");
674 if ((*algo
->decrypt
)(m
, off
, sav
, algo
, ivlen
)) {
675 /* m is already freed */
677 ipseclog((LOG_ERR
, "decrypt fail in IPv6 ESP input: %s\n",
678 ipsec_logsastr(sav
)));
679 ipsec6stat
.in_inval
++;
682 ipsec6stat
.in_esphist
[sav
->alg_enc
]++;
684 m
->m_flags
|= M_DECRYPTED
;
687 * find the trailer of the ESP.
689 m_copydata(m
, m
->m_pkthdr
.len
- sizeof(esptail
), sizeof(esptail
),
691 nxt
= esptail
.esp_nxt
;
692 taillen
= esptail
.esp_padlen
+ sizeof(esptail
);
694 if (m
->m_pkthdr
.len
< taillen
695 || m
->m_pkthdr
.len
- taillen
< sizeof(struct ip6_hdr
)) { /* ? */
696 ipseclog((LOG_WARNING
,
697 "bad pad length in IPv6 ESP input: %s %s\n",
698 ipsec6_logpacketstr(ip6
, spi
), ipsec_logsastr(sav
)));
699 ipsec6stat
.in_inval
++;
703 /* strip off the trailing pad area. */
706 ip6
->ip6_plen
= htons(ntohs(ip6
->ip6_plen
) - taillen
);
708 /* was it transmitted over the IPsec tunnel SA? */
709 if (ipsec6_tunnel_validate(m
, off
+ esplen
+ ivlen
, nxt
, sav
)) {
711 * strip off all the headers that precedes ESP header.
712 * IP6 xx ESP IP6' payload -> IP6' payload
714 * XXX more sanity checks
715 * XXX relationship with gif?
717 u_int32_t flowinfo
; /* net endian */
718 flowinfo
= ip6
->ip6_flow
;
719 m_adj(m
, off
+ esplen
+ ivlen
);
720 if (m
->m_len
< sizeof(*ip6
)) {
721 #ifndef PULLDOWN_TEST
723 * m_pullup is prohibited in KAME IPv6 input processing
724 * but there's no other way!
727 /* okay to pullup in m_pulldown style */
729 m
= m_pullup(m
, sizeof(*ip6
));
731 ipsec6stat
.in_inval
++;
735 ip6
= mtod(m
, struct ip6_hdr
*);
736 /* ECN consideration. */
737 ip6_ecn_egress(ip6_ipsec_ecn
, &flowinfo
, &ip6
->ip6_flow
);
738 if (!key_checktunnelsanity(sav
, AF_INET6
,
739 (caddr_t
)&ip6
->ip6_src
, (caddr_t
)&ip6
->ip6_dst
)) {
740 ipseclog((LOG_ERR
, "ipsec tunnel address mismatch "
741 "in IPv6 ESP input: %s %s\n",
742 ipsec6_logpacketstr(ip6
, spi
),
743 ipsec_logsastr(sav
)));
744 ipsec6stat
.in_inval
++;
748 key_sa_recordxfer(sav
, m
);
749 if (ipsec_addhist(m
, IPPROTO_ESP
, spi
) != 0 ||
750 ipsec_addhist(m
, IPPROTO_IPV6
, 0) != 0) {
751 ipsec6stat
.in_nomem
++;
755 if (netisr_queue(NETISR_IPV6
, m
)) {
756 ipsec6stat
.in_inval
++;
764 * strip off ESP header and IV.
765 * even in m_pulldown case, we need to strip off ESP so that
766 * we can always compute checksum for AH correctly.
772 * Set the next header field of the previous header correctly.
774 prvnxtp
= ip6_get_prevhdr(m
, off
); /* XXX */
777 stripsiz
= esplen
+ ivlen
;
779 ip6
= mtod(m
, struct ip6_hdr
*);
780 if (m
->m_len
>= stripsiz
+ off
) {
781 bcopy((caddr_t
)ip6
, ((caddr_t
)ip6
) + stripsiz
, off
);
782 m
->m_data
+= stripsiz
;
783 m
->m_len
-= stripsiz
;
784 m
->m_pkthdr
.len
-= stripsiz
;
787 * this comes with no copy if the boundary is on
792 n
= m_split(m
, off
, M_NOWAIT
);
794 /* m is retained by m_split */
798 /* m_cat does not update m_pkthdr.len */
799 m
->m_pkthdr
.len
+= n
->m_pkthdr
.len
;
803 #ifndef PULLDOWN_TEST
805 * KAME requires that the packet to be contiguous on the
806 * mbuf. We need to make that sure.
807 * this kind of code should be avoided.
808 * XXX other conditions to avoid running this part?
810 if (m
->m_len
!= m
->m_pkthdr
.len
) {
811 struct mbuf
*n
= NULL
;
814 n
= m_getb(m
->m_pkthdr
.len
, M_NOWAIT
, MT_HEADER
,
817 kprintf("esp6_input: mbuf allocation failed\n");
822 maxlen
= (n
->m_flags
& M_EXT
) ? MCLBYTES
: MHLEN
;
823 if (n
->m_pkthdr
.len
<= maxlen
) {
824 m_copydata(m
, 0, n
->m_pkthdr
.len
, mtod(n
, caddr_t
));
825 n
->m_len
= n
->m_pkthdr
.len
;
829 m_copydata(m
, 0, maxlen
, mtod(n
, caddr_t
));
838 ip6
= mtod(m
, struct ip6_hdr
*);
839 ip6
->ip6_plen
= htons(ntohs(ip6
->ip6_plen
) - stripsiz
);
841 key_sa_recordxfer(sav
, m
);
842 if (ipsec_addhist(m
, IPPROTO_ESP
, spi
) != 0) {
843 ipsec6stat
.in_nomem
++;
852 KEYDEBUG(KEYDEBUG_IPSEC_STAMP
,
853 kprintf("DP esp6_input call free SA:%p\n", sav
));
856 ipsec6stat
.in_success
++;
861 KEYDEBUG(KEYDEBUG_IPSEC_STAMP
,
862 kprintf("DP esp6_input call free SA:%p\n", sav
));
871 esp6_ctlinput(netmsg_t msg
)
873 int cmd
= msg
->ctlinput
.nm_cmd
;
874 struct sockaddr
*sa
= msg
->ctlinput
.nm_arg
;
875 void *d
= msg
->ctlinput
.nm_extra
;
876 const struct newesp
*espp
;
878 struct ip6ctlparam
*ip6cp
= NULL
, ip6cp1
;
879 struct secasvar
*sav
;
883 struct sockaddr_in6
*sa6_src
, *sa6_dst
;
885 if (sa
->sa_family
!= AF_INET6
||
886 sa
->sa_len
!= sizeof(struct sockaddr_in6
))
888 if ((unsigned)cmd
>= PRC_NCMDS
)
891 /* if the parameter is from icmp6, decode it. */
893 ip6cp
= (struct ip6ctlparam
*)d
;
895 ip6
= ip6cp
->ip6c_ip6
;
896 off
= ip6cp
->ip6c_off
;
900 off
= 0; /* fix warning */
905 * Notify the error to all possible sockets via pfctlinput2.
906 * Since the upper layer information (such as protocol type,
907 * source and destination ports) is embedded in the encrypted
908 * data and might have been cut, we can't directly call
909 * an upper layer ctlinput function. However, the pcbnotify
910 * function will consider source and destination addresses
911 * as well as the flow info value, and may be able to find
912 * some PCB that should be notified.
913 * Although kpfctlinput2 will call esp6_ctlinput(), there is
914 * no possibility of an infinite loop of function calls,
915 * because we don't pass the inner IPv6 header.
917 bzero(&ip6cp1
, sizeof(ip6cp1
));
918 ip6cp1
.ip6c_src
= ip6cp
->ip6c_src
;
919 kpfctlinput2(cmd
, sa
, (void *)&ip6cp1
);
922 * Then go to special cases that need ESP header information.
923 * XXX: We assume that when ip6 is non NULL,
924 * M and OFF are valid.
927 /* check if we can safely examine src and dst ports */
928 if (m
->m_pkthdr
.len
< off
+ sizeof(esp
))
931 if (m
->m_len
< off
+ sizeof(esp
)) {
933 * this should be rare case,
934 * so we compromise on this copy...
936 m_copydata(m
, off
, sizeof(esp
), (caddr_t
)&esp
);
939 espp
= (struct newesp
*)(mtod(m
, caddr_t
) + off
);
941 if (cmd
== PRC_MSGSIZE
) {
945 * Check to see if we have a valid SA corresponding to
946 * the address in the ICMP message payload.
948 sa6_src
= ip6cp
->ip6c_src
;
949 sa6_dst
= (struct sockaddr_in6
*)sa
;
950 sav
= key_allocsa(AF_INET6
,
951 (caddr_t
)&sa6_src
->sin6_addr
,
952 (caddr_t
)&sa6_dst
->sin6_addr
,
953 IPPROTO_ESP
, espp
->esp_spi
);
955 if (sav
->state
== SADB_SASTATE_MATURE
||
956 sav
->state
== SADB_SASTATE_DYING
)
961 /* XXX Further validation? */
964 * Depending on the value of "valid" and routing table
965 * size (mtudisc_{hi,lo}wat), we will:
966 * - recalcurate the new MTU and create the
967 * corresponding routing entry, or
968 * - ignore the MTU change notification.
970 icmp6_mtudisc_update((struct ip6ctlparam
*)d
, valid
);
973 /* we normally notify any pcb here */
976 lwkt_replymsg(&msg
->ctlinput
.base
.lmsg
, 0);