1 /* $OpenBSD: pfkeyv2.c,v 1.262 2024/05/17 19:02:04 mvs Exp $ */
2
3 /*
4 * @(#)COPYRIGHT 1.1 (NRL) 17 January 1995
5 *
6 * NRL grants permission for redistribution and use in source and binary
7 * forms, with or without modification, of the software and documentation
8 * created at NRL provided that the following conditions are met:
9 *
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.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgements:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * This product includes software developed at the Information
20 * Technology Division, US Naval Research Laboratory.
21 * 4. Neither the name of the NRL nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL AND CONTRIBUTORS ``AS
26 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
28 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NRL OR
29 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
30 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
31 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * The views and conclusions contained in the software and documentation
38 * are those of the authors and should not be interpreted as representing
39 * official policies, either expressed or implied, of the US Naval
40 * Research Laboratory (NRL).
41 */
42
43 /*
44 * Copyright (c) 1995, 1996, 1997, 1998, 1999 Craig Metz. All rights reserved.
45 *
46 * Redistribution and use in source and binary forms, with or without
47 * modification, are permitted provided that the following conditions
48 * are met:
49 * 1. Redistributions of source code must retain the above copyright
50 * notice, this list of conditions and the following disclaimer.
51 * 2. Redistributions in binary form must reproduce the above copyright
52 * notice, this list of conditions and the following disclaimer in the
53 * documentation and/or other materials provided with the distribution.
54 * 3. Neither the name of the author nor the names of any contributors
55 * may be used to endorse or promote products derived from this software
56 * without specific prior written permission.
57 *
58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
68 * SUCH DAMAGE.
69 */
70
71 #include "pf.h"
72
73 #include <sys/param.h>
74 #include <sys/socket.h>
75 #include <sys/socketvar.h>
76 #include <sys/protosw.h>
77 #include <sys/domain.h>
78 #include <sys/systm.h>
79 #include <sys/mbuf.h>
80 #include <sys/kernel.h>
81 #include <sys/proc.h>
82 #include <sys/pool.h>
83 #include <sys/mutex.h>
84
85 #include <net/route.h>
86 #include <netinet/ip_ipsp.h>
87 #include <net/pfkeyv2.h>
88 #include <net/radix.h>
89 #include <netinet/ip_ah.h>
90 #include <netinet/ip_esp.h>
91 #include <netinet/ip_ipcomp.h>
92 #include <crypto/blf.h>
93
94 #if NPF > 0
95 #include <net/if.h>
96 #include <net/pfvar.h>
97 #endif
98
99 #define PFKEYSNDQ 8192
100 #define PFKEYRCVQ 8192
101
102 static const struct sadb_alg ealgs[] = {
103 { SADB_EALG_NULL, 0, 0, 0 },
104 { SADB_EALG_3DESCBC, 64, 192, 192 },
105 { SADB_X_EALG_BLF, 64, 40, BLF_MAXKEYLEN * 8},
106 { SADB_X_EALG_CAST, 64, 40, 128},
107 { SADB_X_EALG_AES, 128, 128, 256},
108 { SADB_X_EALG_AESCTR, 128, 128 + 32, 256 + 32}
109 };
110
111 static const struct sadb_alg aalgs[] = {
112 { SADB_AALG_SHA1HMAC, 0, 160, 160 },
113 { SADB_AALG_MD5HMAC, 0, 128, 128 },
114 { SADB_X_AALG_RIPEMD160HMAC, 0, 160, 160 },
115 { SADB_X_AALG_SHA2_256, 0, 256, 256 },
116 { SADB_X_AALG_SHA2_384, 0, 384, 384 },
117 { SADB_X_AALG_SHA2_512, 0, 512, 512 }
118 };
119
120 static const struct sadb_alg calgs[] = {
121 { SADB_X_CALG_DEFLATE, 0, 0, 0}
122 };
123
124 struct pool pkpcb_pool;
125 #define PFKEY_MSG_MAXSZ 4096
126 const struct sockaddr pfkey_addr = { 2, PF_KEY, };
127 const struct domain pfkeydomain;
128
129 /*
130 * pfkey PCB
131 *
132 * Locks used to protect struct members in this file:
133 * I immutable after creation
134 * a atomic operations
135 * l pkptable's lock
136 * s socket lock
137 */
138 struct pkpcb {
139 struct socket *kcb_socket; /* [I] associated socket */
140
141 SRPL_ENTRY(pkpcb) kcb_list; /* [l] */
142 struct refcnt kcb_refcnt; /* [a] */
143 int kcb_flags; /* [s] */
144 uint32_t kcb_reg; /* [s] Inc if SATYPE_MAX > 31 */
145 uint32_t kcb_pid; /* [I] */
146 unsigned int kcb_rdomain; /* [I] routing domain */
147 };
148 #define sotokeycb(so) ((struct pkpcb *)(so)->so_pcb)
149 #define keylock(kp) solock((kp)->kcb_socket)
150 #define keyunlock(kp) sounlock((kp)->kcb_socket)
151
152
153 struct dump_state {
154 struct sadb_msg *sadb_msg;
155 struct socket *socket;
156 };
157
158 struct pkptable {
159 SRPL_HEAD(, pkpcb) pkp_list;
160 struct srpl_rc pkp_rc;
161 struct rwlock pkp_lk;
162 };
163
164 struct pkptable pkptable;
165 struct mutex pfkeyv2_mtx = MUTEX_INITIALIZER(IPL_MPFLOOR);
166 static uint32_t pfkeyv2_seq = 1;
167 static int nregistered = 0;
168 static int npromisc = 0;
169
170 void pfkey_init(void);
171
172 int pfkeyv2_attach(struct socket *, int, int);
173 int pfkeyv2_detach(struct socket *);
174 int pfkeyv2_disconnect(struct socket *);
175 int pfkeyv2_shutdown(struct socket *);
176 int pfkeyv2_send(struct socket *, struct mbuf *, struct mbuf *,
177 struct mbuf *);
178 int pfkeyv2_sockaddr(struct socket *, struct mbuf *);
179 int pfkeyv2_peeraddr(struct socket *, struct mbuf *);
180 int pfkeyv2_output(struct mbuf *, struct socket *);
181 int pfkey_sendup(struct pkpcb *, struct mbuf *, int);
182 int pfkeyv2_sa_flush(struct tdb *, void *, int);
183 int pfkeyv2_policy_flush(struct ipsec_policy *, void *, unsigned int);
184 int pfkeyv2_sysctl_policydumper(struct ipsec_policy *, void *, unsigned int);
185
186 void keycb_ref(void *, void *);
187 void keycb_unref(void *, void *);
188
189 /*
190 * Wrapper around m_devget(); copy data from contiguous buffer to mbuf
191 * chain.
192 */
193 int
pfdatatopacket(void * data,int len,struct mbuf ** packet)194 pfdatatopacket(void *data, int len, struct mbuf **packet)
195 {
196 if (!(*packet = m_devget(data, len, 0)))
197 return (ENOMEM);
198
199 /* Make sure, all data gets zeroized on free */
200 (*packet)->m_flags |= M_ZEROIZE;
201
202 return (0);
203 }
204
205 const struct pr_usrreqs pfkeyv2_usrreqs = {
206 .pru_attach = pfkeyv2_attach,
207 .pru_detach = pfkeyv2_detach,
208 .pru_disconnect = pfkeyv2_disconnect,
209 .pru_shutdown = pfkeyv2_shutdown,
210 .pru_send = pfkeyv2_send,
211 .pru_sockaddr = pfkeyv2_sockaddr,
212 .pru_peeraddr = pfkeyv2_peeraddr,
213 };
214
215 const struct protosw pfkeysw[] = {
216 {
217 .pr_type = SOCK_RAW,
218 .pr_domain = &pfkeydomain,
219 .pr_protocol = PF_KEY_V2,
220 .pr_flags = PR_ATOMIC | PR_ADDR,
221 .pr_usrreqs = &pfkeyv2_usrreqs,
222 .pr_sysctl = pfkeyv2_sysctl,
223 }
224 };
225
226 const struct domain pfkeydomain = {
227 .dom_family = PF_KEY,
228 .dom_name = "pfkey",
229 .dom_init = pfkey_init,
230 .dom_protosw = pfkeysw,
231 .dom_protoswNPROTOSW = &pfkeysw[nitems(pfkeysw)],
232 };
233
234 void
keycb_ref(void * null,void * v)235 keycb_ref(void *null, void *v)
236 {
237 struct pkpcb *kp = v;
238
239 refcnt_take(&kp->kcb_refcnt);
240 }
241
242 void
keycb_unref(void * null,void * v)243 keycb_unref(void *null, void *v)
244 {
245 struct pkpcb *kp = v;
246
247 refcnt_rele_wake(&kp->kcb_refcnt);
248 }
249
250 void
pfkey_init(void)251 pfkey_init(void)
252 {
253 rn_init(sizeof(struct sockaddr_encap));
254 srpl_rc_init(&pkptable.pkp_rc, keycb_ref, keycb_unref, NULL);
255 rw_init(&pkptable.pkp_lk, "pfkey");
256 SRPL_INIT(&pkptable.pkp_list);
257 pool_init(&pkpcb_pool, sizeof(struct pkpcb), 0,
258 IPL_SOFTNET, PR_WAITOK, "pkpcb", NULL);
259 pool_init(&ipsec_policy_pool, sizeof(struct ipsec_policy), 0,
260 IPL_SOFTNET, 0, "ipsec policy", NULL);
261 pool_init(&ipsec_acquire_pool, sizeof(struct ipsec_acquire), 0,
262 IPL_SOFTNET, 0, "ipsec acquire", NULL);
263 }
264
265
266 /*
267 * Attach a new PF_KEYv2 socket.
268 */
269 int
pfkeyv2_attach(struct socket * so,int proto,int wait)270 pfkeyv2_attach(struct socket *so, int proto, int wait)
271 {
272 struct pkpcb *kp;
273 int error;
274
275 if ((so->so_state & SS_PRIV) == 0)
276 return EACCES;
277
278 error = soreserve(so, PFKEYSNDQ, PFKEYRCVQ);
279 if (error)
280 return (error);
281
282 kp = pool_get(&pkpcb_pool, (wait == M_WAIT ? PR_WAITOK : PR_NOWAIT) |
283 PR_ZERO);
284 if (kp == NULL)
285 return (ENOBUFS);
286 so->so_pcb = kp;
287 refcnt_init(&kp->kcb_refcnt);
288 kp->kcb_socket = so;
289 kp->kcb_pid = curproc->p_p->ps_pid;
290 kp->kcb_rdomain = rtable_l2(curproc->p_p->ps_rtableid);
291
292 so->so_options |= SO_USELOOPBACK;
293 soisconnected(so);
294
295 rw_enter(&pkptable.pkp_lk, RW_WRITE);
296 SRPL_INSERT_HEAD_LOCKED(&pkptable.pkp_rc, &pkptable.pkp_list, kp, kcb_list);
297 rw_exit(&pkptable.pkp_lk);
298
299 return (0);
300 }
301
302 /*
303 * Close a PF_KEYv2 socket.
304 */
305 int
pfkeyv2_detach(struct socket * so)306 pfkeyv2_detach(struct socket *so)
307 {
308 struct pkpcb *kp;
309
310 soassertlocked(so);
311
312 kp = sotokeycb(so);
313 if (kp == NULL)
314 return ENOTCONN;
315
316 if (kp->kcb_flags &
317 (PFKEYV2_SOCKETFLAGS_REGISTERED|PFKEYV2_SOCKETFLAGS_PROMISC)) {
318 mtx_enter(&pfkeyv2_mtx);
319 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED)
320 nregistered--;
321
322 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC)
323 npromisc--;
324 mtx_leave(&pfkeyv2_mtx);
325 }
326
327 rw_enter(&pkptable.pkp_lk, RW_WRITE);
328 SRPL_REMOVE_LOCKED(&pkptable.pkp_rc, &pkptable.pkp_list, kp, pkpcb,
329 kcb_list);
330 rw_exit(&pkptable.pkp_lk);
331
332 sounlock(so);
333 /* wait for all references to drop */
334 refcnt_finalize(&kp->kcb_refcnt, "pfkeyrefs");
335 solock(so);
336
337 so->so_pcb = NULL;
338 KASSERT((so->so_state & SS_NOFDREF) == 0);
339 pool_put(&pkpcb_pool, kp);
340
341 return (0);
342 }
343
344 int
pfkeyv2_disconnect(struct socket * so)345 pfkeyv2_disconnect(struct socket *so)
346 {
347 soisdisconnected(so);
348 return (0);
349 }
350
351 int
pfkeyv2_shutdown(struct socket * so)352 pfkeyv2_shutdown(struct socket *so)
353 {
354 socantsendmore(so);
355 return (0);
356 }
357
358 int
pfkeyv2_send(struct socket * so,struct mbuf * m,struct mbuf * nam,struct mbuf * control)359 pfkeyv2_send(struct socket *so, struct mbuf *m, struct mbuf *nam,
360 struct mbuf *control)
361 {
362 int error;
363
364 soassertlocked(so);
365
366 if (control && control->m_len) {
367 error = EOPNOTSUPP;
368 goto out;
369 }
370
371 if (nam) {
372 error = EISCONN;
373 goto out;
374 }
375
376 error = pfkeyv2_output(m, so);
377 m = NULL;
378
379 out:
380 m_freem(control);
381 m_freem(m);
382
383 return (error);
384 }
385
386 int
pfkeyv2_sockaddr(struct socket * so,struct mbuf * nam)387 pfkeyv2_sockaddr(struct socket *so, struct mbuf *nam)
388 {
389 return (EINVAL);
390 }
391
392 int
pfkeyv2_peeraddr(struct socket * so,struct mbuf * nam)393 pfkeyv2_peeraddr(struct socket *so, struct mbuf *nam)
394 {
395 /* minimal support, just implement a fake peer address */
396 bcopy(&pfkey_addr, mtod(nam, caddr_t), pfkey_addr.sa_len);
397 nam->m_len = pfkey_addr.sa_len;
398 return (0);
399 }
400
401 int
pfkeyv2_output(struct mbuf * mbuf,struct socket * so)402 pfkeyv2_output(struct mbuf *mbuf, struct socket *so)
403 {
404 void *message;
405 int error = 0;
406
407 #ifdef DIAGNOSTIC
408 if (!mbuf || !(mbuf->m_flags & M_PKTHDR)) {
409 error = EINVAL;
410 goto ret;
411 }
412 #endif /* DIAGNOSTIC */
413
414 if (mbuf->m_pkthdr.len > PFKEY_MSG_MAXSZ) {
415 error = EMSGSIZE;
416 goto ret;
417 }
418
419 if (!(message = malloc((unsigned long) mbuf->m_pkthdr.len,
420 M_PFKEY, M_DONTWAIT))) {
421 error = ENOMEM;
422 goto ret;
423 }
424
425 m_copydata(mbuf, 0, mbuf->m_pkthdr.len, message);
426
427 /*
428 * The socket can't be closed concurrently because the file
429 * descriptor reference is still held.
430 */
431
432 sounlock(so);
433 error = pfkeyv2_dosend(so, message, mbuf->m_pkthdr.len);
434 solock(so);
435
436 ret:
437 m_freem(mbuf);
438 return (error);
439 }
440
441 int
pfkey_sendup(struct pkpcb * kp,struct mbuf * m0,int more)442 pfkey_sendup(struct pkpcb *kp, struct mbuf *m0, int more)
443 {
444 struct socket *so = kp->kcb_socket;
445 struct mbuf *m;
446 int ret;
447
448 if (more) {
449 if (!(m = m_dup_pkt(m0, 0, M_DONTWAIT)))
450 return (ENOMEM);
451 } else
452 m = m0;
453
454 mtx_enter(&so->so_rcv.sb_mtx);
455 ret = sbappendaddr(so, &so->so_rcv, &pfkey_addr, m, NULL);
456 mtx_leave(&so->so_rcv.sb_mtx);
457
458 if (ret == 0) {
459 m_freem(m);
460 return (ENOBUFS);
461 }
462
463 sorwakeup(so);
464 return (0);
465 }
466
467 /*
468 * Send a PFKEYv2 message, possibly to many receivers, based on the
469 * satype of the socket (which is set by the REGISTER message), and the
470 * third argument.
471 */
472 int
pfkeyv2_sendmessage(void ** headers,int mode,struct socket * so,u_int8_t satype,int count,u_int rdomain)473 pfkeyv2_sendmessage(void **headers, int mode, struct socket *so,
474 u_int8_t satype, int count, u_int rdomain)
475 {
476 int i, j, rval;
477 void *p, *buffer = NULL;
478 struct mbuf *packet;
479 struct pkpcb *kp;
480 struct sadb_msg *smsg;
481 struct srp_ref sr;
482
483 /* Find out how much space we'll need... */
484 j = sizeof(struct sadb_msg);
485
486 for (i = 1; i <= SADB_EXT_MAX; i++)
487 if (headers[i])
488 j += ((struct sadb_ext *)headers[i])->sadb_ext_len *
489 sizeof(uint64_t);
490
491 /* ...and allocate it */
492 if (!(buffer = malloc(j + sizeof(struct sadb_msg), M_PFKEY,
493 M_NOWAIT))) {
494 rval = ENOMEM;
495 goto ret;
496 }
497
498 p = buffer + sizeof(struct sadb_msg);
499 bcopy(headers[0], p, sizeof(struct sadb_msg));
500 ((struct sadb_msg *) p)->sadb_msg_len = j / sizeof(uint64_t);
501 p += sizeof(struct sadb_msg);
502
503 /* Copy payloads in the packet */
504 for (i = 1; i <= SADB_EXT_MAX; i++)
505 if (headers[i]) {
506 ((struct sadb_ext *) headers[i])->sadb_ext_type = i;
507 bcopy(headers[i], p, EXTLEN(headers[i]));
508 p += EXTLEN(headers[i]);
509 }
510
511 if ((rval = pfdatatopacket(buffer + sizeof(struct sadb_msg),
512 j, &packet)) != 0)
513 goto ret;
514
515 switch (mode) {
516 case PFKEYV2_SENDMESSAGE_UNICAST:
517 /*
518 * Send message to the specified socket, plus all
519 * promiscuous listeners.
520 */
521 pfkey_sendup(sotokeycb(so), packet, 0);
522
523 /*
524 * Promiscuous messages contain the original message
525 * encapsulated in another sadb_msg header.
526 */
527 bzero(buffer, sizeof(struct sadb_msg));
528 smsg = (struct sadb_msg *) buffer;
529 smsg->sadb_msg_version = PF_KEY_V2;
530 smsg->sadb_msg_type = SADB_X_PROMISC;
531 smsg->sadb_msg_len = (sizeof(struct sadb_msg) + j) /
532 sizeof(uint64_t);
533 smsg->sadb_msg_seq = 0;
534
535 /* Copy to mbuf chain */
536 if ((rval = pfdatatopacket(buffer, sizeof(struct sadb_msg) + j,
537 &packet)) != 0)
538 goto ret;
539
540 /*
541 * Search for promiscuous listeners, skipping the
542 * original destination.
543 */
544 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) {
545 if (kp->kcb_socket == so || kp->kcb_rdomain != rdomain)
546 continue;
547
548 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC)
549 pfkey_sendup(kp, packet, 1);
550 }
551 SRPL_LEAVE(&sr);
552 m_freem(packet);
553 break;
554
555 case PFKEYV2_SENDMESSAGE_REGISTERED:
556 /*
557 * Send the message to all registered sockets that match
558 * the specified satype (e.g., all IPSEC-ESP negotiators)
559 */
560 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) {
561 if (kp->kcb_rdomain != rdomain)
562 continue;
563
564 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED) {
565 if (!satype) {
566 /* Just send to everyone registered */
567 pfkey_sendup(kp, packet, 1);
568 } else {
569 keylock(kp);
570 /* Check for specified satype */
571 if ((1 << satype) & kp->kcb_reg)
572 pfkey_sendup(kp, packet, 1);
573 keyunlock(kp);
574 }
575 }
576 }
577 SRPL_LEAVE(&sr);
578 /* Free last/original copy of the packet */
579 m_freem(packet);
580
581 /* Encapsulate the original message "inside" an sadb_msg header */
582 bzero(buffer, sizeof(struct sadb_msg));
583 smsg = (struct sadb_msg *) buffer;
584 smsg->sadb_msg_version = PF_KEY_V2;
585 smsg->sadb_msg_type = SADB_X_PROMISC;
586 smsg->sadb_msg_len = (sizeof(struct sadb_msg) + j) /
587 sizeof(uint64_t);
588 smsg->sadb_msg_seq = 0;
589
590 /* Convert to mbuf chain */
591 if ((rval = pfdatatopacket(buffer, sizeof(struct sadb_msg) + j,
592 &packet)) != 0)
593 goto ret;
594
595 /* Send to all registered promiscuous listeners */
596 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) {
597 int flags = READ_ONCE(kp->kcb_flags);
598
599 if (kp->kcb_rdomain != rdomain)
600 continue;
601
602 if ((flags & PFKEYV2_SOCKETFLAGS_PROMISC) &&
603 !(flags & PFKEYV2_SOCKETFLAGS_REGISTERED))
604 pfkey_sendup(kp, packet, 1);
605 }
606 SRPL_LEAVE(&sr);
607 m_freem(packet);
608 break;
609
610 case PFKEYV2_SENDMESSAGE_BROADCAST:
611 /* Send message to all sockets */
612 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) {
613 if (kp->kcb_rdomain != rdomain)
614 continue;
615
616 pfkey_sendup(kp, packet, 1);
617 }
618 SRPL_LEAVE(&sr);
619 m_freem(packet);
620 break;
621 }
622
623 ret:
624 if (buffer != NULL) {
625 explicit_bzero(buffer, j + sizeof(struct sadb_msg));
626 free(buffer, M_PFKEY, j + sizeof(struct sadb_msg));
627 }
628
629 return (rval);
630 }
631
632 /*
633 * Get SPD information for an ACQUIRE. We setup the message such that
634 * the SRC/DST payloads are relative to us (regardless of whether the
635 * SPD rule was for incoming or outgoing packets).
636 */
637 int
pfkeyv2_policy(struct ipsec_acquire * ipa,void ** headers,void ** buffer,int * bufferlen)638 pfkeyv2_policy(struct ipsec_acquire *ipa, void **headers, void **buffer,
639 int *bufferlen)
640 {
641 union sockaddr_union sunion;
642 struct sadb_protocol *sp;
643 int rval, i, dir;
644 void *p;
645
646 /* Find out how big a buffer we need */
647 i = 4 * sizeof(struct sadb_address) + sizeof(struct sadb_protocol);
648 bzero(&sunion, sizeof(union sockaddr_union));
649
650 switch (ipa->ipa_info.sen_type) {
651 case SENT_IP4:
652 i += 4 * PADUP(sizeof(struct sockaddr_in));
653 sunion.sa.sa_family = AF_INET;
654 sunion.sa.sa_len = sizeof(struct sockaddr_in);
655 dir = ipa->ipa_info.sen_direction;
656 break;
657
658 #ifdef INET6
659 case SENT_IP6:
660 i += 4 * PADUP(sizeof(struct sockaddr_in6));
661 sunion.sa.sa_family = AF_INET6;
662 sunion.sa.sa_len = sizeof(struct sockaddr_in6);
663 dir = ipa->ipa_info.sen_ip6_direction;
664 break;
665 #endif /* INET6 */
666
667 default:
668 return (EINVAL);
669 }
670
671 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) {
672 rval = ENOMEM;
673 goto ret;
674 } else {
675 *buffer = p;
676 *bufferlen = i;
677 }
678
679 if (dir == IPSP_DIRECTION_OUT)
680 headers[SADB_X_EXT_SRC_FLOW] = p;
681 else
682 headers[SADB_X_EXT_DST_FLOW] = p;
683 switch (sunion.sa.sa_family) {
684 case AF_INET:
685 sunion.sin.sin_addr = ipa->ipa_info.sen_ip_src;
686 sunion.sin.sin_port = ipa->ipa_info.sen_sport;
687 break;
688
689 #ifdef INET6
690 case AF_INET6:
691 sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_src;
692 sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_sport;
693 break;
694 #endif /* INET6 */
695 }
696 export_address(&p, &sunion.sa);
697
698 if (dir == IPSP_DIRECTION_OUT)
699 headers[SADB_X_EXT_SRC_MASK] = p;
700 else
701 headers[SADB_X_EXT_DST_MASK] = p;
702 switch (sunion.sa.sa_family) {
703 case AF_INET:
704 sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_src;
705 sunion.sin.sin_port = ipa->ipa_mask.sen_sport;
706 break;
707
708 #ifdef INET6
709 case AF_INET6:
710 sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_src;
711 sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_sport;
712 break;
713 #endif /* INET6 */
714 }
715 export_address(&p, &sunion.sa);
716
717 if (dir == IPSP_DIRECTION_OUT)
718 headers[SADB_X_EXT_DST_FLOW] = p;
719 else
720 headers[SADB_X_EXT_SRC_FLOW] = p;
721 switch (sunion.sa.sa_family) {
722 case AF_INET:
723 sunion.sin.sin_addr = ipa->ipa_info.sen_ip_dst;
724 sunion.sin.sin_port = ipa->ipa_info.sen_dport;
725 break;
726
727 #ifdef INET6
728 case AF_INET6:
729 sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_dst;
730 sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_dport;
731 break;
732 #endif /* INET6 */
733 }
734 export_address(&p, &sunion.sa);
735
736 if (dir == IPSP_DIRECTION_OUT)
737 headers[SADB_X_EXT_DST_MASK] = p;
738 else
739 headers[SADB_X_EXT_SRC_MASK] = p;
740 switch (sunion.sa.sa_family) {
741 case AF_INET:
742 sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_dst;
743 sunion.sin.sin_port = ipa->ipa_mask.sen_dport;
744 break;
745
746 #ifdef INET6
747 case AF_INET6:
748 sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_dst;
749 sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_dport;
750 break;
751 #endif /* INET6 */
752 }
753 export_address(&p, &sunion.sa);
754
755 headers[SADB_X_EXT_FLOW_TYPE] = p;
756 sp = p;
757 sp->sadb_protocol_len = sizeof(struct sadb_protocol) /
758 sizeof(u_int64_t);
759 switch (sunion.sa.sa_family) {
760 case AF_INET:
761 if (ipa->ipa_mask.sen_proto)
762 sp->sadb_protocol_proto = ipa->ipa_info.sen_proto;
763 sp->sadb_protocol_direction = ipa->ipa_info.sen_direction;
764 break;
765
766 #ifdef INET6
767 case AF_INET6:
768 if (ipa->ipa_mask.sen_ip6_proto)
769 sp->sadb_protocol_proto = ipa->ipa_info.sen_ip6_proto;
770 sp->sadb_protocol_direction = ipa->ipa_info.sen_ip6_direction;
771 break;
772 #endif /* INET6 */
773 }
774
775 rval = 0;
776
777 ret:
778 return (rval);
779 }
780
781 /*
782 * Get all the information contained in an SA to a PFKEYV2 message.
783 */
784 int
pfkeyv2_get(struct tdb * tdb,void ** headers,void ** buffer,int * lenp,int * lenused)785 pfkeyv2_get(struct tdb *tdb, void **headers, void **buffer, int *lenp,
786 int *lenused)
787 {
788 int rval, i;
789 void *p;
790
791 NET_ASSERT_LOCKED();
792
793 /* Find how much space we need */
794 i = sizeof(struct sadb_sa) + sizeof(struct sadb_lifetime) +
795 sizeof(struct sadb_x_counter);
796
797 if (tdb->tdb_soft_allocations || tdb->tdb_soft_bytes ||
798 tdb->tdb_soft_timeout || tdb->tdb_soft_first_use)
799 i += sizeof(struct sadb_lifetime);
800
801 if (tdb->tdb_exp_allocations || tdb->tdb_exp_bytes ||
802 tdb->tdb_exp_timeout || tdb->tdb_exp_first_use)
803 i += sizeof(struct sadb_lifetime);
804
805 if (tdb->tdb_last_used)
806 i += sizeof(struct sadb_lifetime);
807
808 i += sizeof(struct sadb_address) + PADUP(tdb->tdb_src.sa.sa_len);
809 i += sizeof(struct sadb_address) + PADUP(tdb->tdb_dst.sa.sa_len);
810
811 if (tdb->tdb_ids) {
812 i += sizeof(struct sadb_ident) + PADUP(tdb->tdb_ids->id_local->len);
813 i += sizeof(struct sadb_ident) + PADUP(tdb->tdb_ids->id_remote->len);
814 }
815
816 if (tdb->tdb_amxkey)
817 i += sizeof(struct sadb_key) + PADUP(tdb->tdb_amxkeylen);
818
819 if (tdb->tdb_emxkey)
820 i += sizeof(struct sadb_key) + PADUP(tdb->tdb_emxkeylen);
821
822 if (tdb->tdb_filter.sen_type) {
823 i += 2 * sizeof(struct sadb_protocol);
824
825 /* We'll need four of them: src, src mask, dst, dst mask. */
826 switch (tdb->tdb_filter.sen_type) {
827 case SENT_IP4:
828 i += 4 * PADUP(sizeof(struct sockaddr_in));
829 i += 4 * sizeof(struct sadb_address);
830 break;
831 #ifdef INET6
832 case SENT_IP6:
833 i += 4 * PADUP(sizeof(struct sockaddr_in6));
834 i += 4 * sizeof(struct sadb_address);
835 break;
836 #endif /* INET6 */
837 default:
838 rval = EINVAL;
839 goto ret;
840 }
841 }
842
843 if (tdb->tdb_onext) {
844 i += sizeof(struct sadb_sa);
845 i += sizeof(struct sadb_address) +
846 PADUP(tdb->tdb_onext->tdb_dst.sa.sa_len);
847 i += sizeof(struct sadb_protocol);
848 }
849
850 if (tdb->tdb_udpencap_port)
851 i += sizeof(struct sadb_x_udpencap);
852
853 i += sizeof(struct sadb_x_replay);
854
855 if (tdb->tdb_mtu > 0)
856 i+= sizeof(struct sadb_x_mtu);
857
858 if (tdb->tdb_rdomain != tdb->tdb_rdomain_post)
859 i += sizeof(struct sadb_x_rdomain);
860
861 #if NPF > 0
862 if (tdb->tdb_tag)
863 i += sizeof(struct sadb_x_tag) + PADUP(PF_TAG_NAME_SIZE);
864 if (tdb->tdb_tap)
865 i += sizeof(struct sadb_x_tap);
866 #endif
867
868 if (ISSET(tdb->tdb_flags, TDBF_IFACE))
869 i += sizeof(struct sadb_x_iface);
870
871 if (lenp)
872 *lenp = i;
873
874 if (buffer == NULL) {
875 rval = 0;
876 goto ret;
877 }
878
879 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) {
880 rval = ENOMEM;
881 goto ret;
882 } else
883 *buffer = p;
884
885 headers[SADB_EXT_SA] = p;
886
887 export_sa(&p, tdb); /* Export SA information (mostly flags) */
888
889 /* Export lifetimes where applicable */
890 headers[SADB_EXT_LIFETIME_CURRENT] = p;
891 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_CURRENT);
892
893 if (tdb->tdb_soft_allocations || tdb->tdb_soft_bytes ||
894 tdb->tdb_soft_first_use || tdb->tdb_soft_timeout) {
895 headers[SADB_EXT_LIFETIME_SOFT] = p;
896 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_SOFT);
897 }
898
899 if (tdb->tdb_exp_allocations || tdb->tdb_exp_bytes ||
900 tdb->tdb_exp_first_use || tdb->tdb_exp_timeout) {
901 headers[SADB_EXT_LIFETIME_HARD] = p;
902 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_HARD);
903 }
904
905 if (tdb->tdb_last_used) {
906 headers[SADB_X_EXT_LIFETIME_LASTUSE] = p;
907 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_LASTUSE);
908 }
909
910 /* Export TDB source address */
911 headers[SADB_EXT_ADDRESS_SRC] = p;
912 export_address(&p, &tdb->tdb_src.sa);
913
914 /* Export TDB destination address */
915 headers[SADB_EXT_ADDRESS_DST] = p;
916 export_address(&p, &tdb->tdb_dst.sa);
917
918 /* Export source/destination identities, if present */
919 if (tdb->tdb_ids)
920 export_identities(&p, tdb->tdb_ids, tdb->tdb_ids_swapped, headers);
921
922 /* Export authentication key, if present */
923 if (tdb->tdb_amxkey) {
924 headers[SADB_EXT_KEY_AUTH] = p;
925 export_key(&p, tdb, PFKEYV2_AUTHENTICATION_KEY);
926 }
927
928 /* Export encryption key, if present */
929 if (tdb->tdb_emxkey) {
930 headers[SADB_EXT_KEY_ENCRYPT] = p;
931 export_key(&p, tdb, PFKEYV2_ENCRYPTION_KEY);
932 }
933
934 /* Export flow/filter, if present */
935 if (tdb->tdb_filter.sen_type)
936 export_flow(&p, IPSP_IPSEC_USE, &tdb->tdb_filter,
937 &tdb->tdb_filtermask, headers);
938
939 if (tdb->tdb_onext) {
940 headers[SADB_X_EXT_SA2] = p;
941 export_sa(&p, tdb->tdb_onext);
942 headers[SADB_X_EXT_DST2] = p;
943 export_address(&p, &tdb->tdb_onext->tdb_dst.sa);
944 headers[SADB_X_EXT_SATYPE2] = p;
945 export_satype(&p, tdb->tdb_onext);
946 }
947
948 /* Export UDP encapsulation port, if present */
949 if (tdb->tdb_udpencap_port) {
950 headers[SADB_X_EXT_UDPENCAP] = p;
951 export_udpencap(&p, tdb);
952 }
953
954 headers[SADB_X_EXT_REPLAY] = p;
955 export_replay(&p, tdb);
956
957 if (tdb->tdb_mtu > 0) {
958 headers[SADB_X_EXT_MTU] = p;
959 export_mtu(&p, tdb);
960 }
961
962 /* Export rdomain switch, if present */
963 if (tdb->tdb_rdomain != tdb->tdb_rdomain_post) {
964 headers[SADB_X_EXT_RDOMAIN] = p;
965 export_rdomain(&p, tdb);
966 }
967
968 #if NPF > 0
969 /* Export tag information, if present */
970 if (tdb->tdb_tag) {
971 headers[SADB_X_EXT_TAG] = p;
972 export_tag(&p, tdb);
973 }
974
975 /* Export tap enc(4) device information, if present */
976 if (tdb->tdb_tap) {
977 headers[SADB_X_EXT_TAP] = p;
978 export_tap(&p, tdb);
979 }
980 #endif
981
982 /* Export sec(4) interface information, if present */
983 if (ISSET(tdb->tdb_flags, TDBF_IFACE)) {
984 headers[SADB_X_EXT_IFACE] = p;
985 export_iface(&p, tdb);
986 }
987
988 headers[SADB_X_EXT_COUNTER] = p;
989 export_counter(&p, tdb);
990
991 if (lenused)
992 *lenused = p - *buffer;
993 rval = 0;
994
995 ret:
996 return (rval);
997 }
998
999 /*
1000 * Dump a TDB.
1001 */
1002 int
pfkeyv2_dump_walker(struct tdb * tdb,void * state,int last)1003 pfkeyv2_dump_walker(struct tdb *tdb, void *state, int last)
1004 {
1005 struct dump_state *dump_state = (struct dump_state *) state;
1006 void *headers[SADB_EXT_MAX+1], *buffer;
1007 int buflen;
1008 int rval;
1009
1010 /* If not satype was specified, dump all TDBs */
1011 if (!dump_state->sadb_msg->sadb_msg_satype ||
1012 (tdb->tdb_satype == dump_state->sadb_msg->sadb_msg_satype)) {
1013 bzero(headers, sizeof(headers));
1014 headers[0] = (void *) dump_state->sadb_msg;
1015
1016 /* Get the information from the TDB to a PFKEYv2 message */
1017 if ((rval = pfkeyv2_get(tdb, headers, &buffer, &buflen, NULL)) != 0)
1018 return (rval);
1019
1020 if (last)
1021 ((struct sadb_msg *)headers[0])->sadb_msg_seq = 0;
1022
1023 /* Send the message to the specified socket */
1024 rval = pfkeyv2_sendmessage(headers,
1025 PFKEYV2_SENDMESSAGE_UNICAST, dump_state->socket, 0, 0,
1026 tdb->tdb_rdomain);
1027
1028 explicit_bzero(buffer, buflen);
1029 free(buffer, M_PFKEY, buflen);
1030 if (rval)
1031 return (rval);
1032 }
1033
1034 return (0);
1035 }
1036
1037 /*
1038 * Delete an SA.
1039 */
1040 int
pfkeyv2_sa_flush(struct tdb * tdb,void * satype_vp,int last)1041 pfkeyv2_sa_flush(struct tdb *tdb, void *satype_vp, int last)
1042 {
1043 if (!(*((u_int8_t *) satype_vp)) ||
1044 tdb->tdb_satype == *((u_int8_t *) satype_vp))
1045 tdb_delete(tdb);
1046 return (0);
1047 }
1048
1049 /*
1050 * Convert between SATYPEs and IPsec protocols, taking into consideration
1051 * sysctl variables enabling/disabling ESP/AH and the presence of the old
1052 * IPsec transforms.
1053 */
1054 int
pfkeyv2_get_proto_alg(u_int8_t satype,u_int8_t * sproto,int * alg)1055 pfkeyv2_get_proto_alg(u_int8_t satype, u_int8_t *sproto, int *alg)
1056 {
1057 switch (satype) {
1058 #ifdef IPSEC
1059 case SADB_SATYPE_AH:
1060 if (!ah_enable)
1061 return (EOPNOTSUPP);
1062
1063 *sproto = IPPROTO_AH;
1064
1065 if(alg != NULL)
1066 *alg = satype = XF_AH;
1067
1068 break;
1069
1070 case SADB_SATYPE_ESP:
1071 if (!esp_enable)
1072 return (EOPNOTSUPP);
1073
1074 *sproto = IPPROTO_ESP;
1075
1076 if(alg != NULL)
1077 *alg = satype = XF_ESP;
1078
1079 break;
1080
1081 case SADB_X_SATYPE_IPIP:
1082 *sproto = IPPROTO_IPIP;
1083
1084 if (alg != NULL)
1085 *alg = XF_IP4;
1086
1087 break;
1088
1089 case SADB_X_SATYPE_IPCOMP:
1090 if (!ipcomp_enable)
1091 return (EOPNOTSUPP);
1092
1093 *sproto = IPPROTO_IPCOMP;
1094
1095 if(alg != NULL)
1096 *alg = satype = XF_IPCOMP;
1097
1098 break;
1099 #endif /* IPSEC */
1100 #ifdef TCP_SIGNATURE
1101 case SADB_X_SATYPE_TCPSIGNATURE:
1102 *sproto = IPPROTO_TCP;
1103
1104 if (alg != NULL)
1105 *alg = XF_TCPSIGNATURE;
1106
1107 break;
1108 #endif /* TCP_SIGNATURE */
1109
1110 default: /* Nothing else supported */
1111 return (EOPNOTSUPP);
1112 }
1113
1114 return (0);
1115 }
1116
1117 /*
1118 * Handle all messages from userland to kernel.
1119 */
1120 int
pfkeyv2_dosend(struct socket * so,void * message,int len)1121 pfkeyv2_dosend(struct socket *so, void *message, int len)
1122 {
1123 int i, j, rval = 0, mode = PFKEYV2_SENDMESSAGE_BROADCAST;
1124 int delflag = 0;
1125 struct sockaddr_encap encapdst, encapnetmask;
1126 struct ipsec_policy *ipo;
1127 struct ipsec_acquire *ipa;
1128 struct radix_node_head *rnh;
1129 struct radix_node *rn = NULL;
1130 struct pkpcb *kp, *bkp;
1131 void *freeme = NULL, *freeme2 = NULL, *freeme3 = NULL;
1132 int freeme_sz = 0, freeme2_sz = 0, freeme3_sz = 0;
1133 void *bckptr = NULL;
1134 void *headers[SADB_EXT_MAX + 1];
1135 union sockaddr_union *sunionp;
1136 struct tdb *sa1 = NULL, *sa2 = NULL;
1137 struct sadb_msg *smsg;
1138 struct sadb_spirange *sprng;
1139 struct sadb_sa *ssa;
1140 struct sadb_supported *ssup;
1141 struct sadb_ident *sid, *did;
1142 struct srp_ref sr;
1143 struct sadb_x_rdomain *srdomain;
1144 u_int rdomain = 0;
1145 int promisc;
1146
1147 mtx_enter(&pfkeyv2_mtx);
1148 promisc = npromisc;
1149 mtx_leave(&pfkeyv2_mtx);
1150
1151 /* Verify that we received this over a legitimate pfkeyv2 socket */
1152 bzero(headers, sizeof(headers));
1153
1154 kp = sotokeycb(so);
1155 if (!kp) {
1156 rval = EINVAL;
1157 goto ret;
1158 }
1159
1160 rdomain = kp->kcb_rdomain;
1161
1162 /* Validate message format */
1163 if ((rval = pfkeyv2_parsemessage(message, len, headers)) != 0)
1164 goto ret;
1165
1166 /* If we have any promiscuous listeners, send them a copy of the message */
1167 if (promisc) {
1168 struct mbuf *packet;
1169
1170 freeme_sz = sizeof(struct sadb_msg) + len;
1171 if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT))) {
1172 rval = ENOMEM;
1173 goto ret;
1174 }
1175
1176 /* Initialize encapsulating header */
1177 bzero(freeme, sizeof(struct sadb_msg));
1178 smsg = (struct sadb_msg *) freeme;
1179 smsg->sadb_msg_version = PF_KEY_V2;
1180 smsg->sadb_msg_type = SADB_X_PROMISC;
1181 smsg->sadb_msg_len = (sizeof(struct sadb_msg) + len) /
1182 sizeof(uint64_t);
1183 smsg->sadb_msg_seq = curproc->p_p->ps_pid;
1184
1185 bcopy(message, freeme + sizeof(struct sadb_msg), len);
1186
1187 /* Convert to mbuf chain */
1188 if ((rval = pfdatatopacket(freeme, freeme_sz, &packet)) != 0)
1189 goto ret;
1190
1191 /* Send to all promiscuous listeners */
1192 SRPL_FOREACH(bkp, &sr, &pkptable.pkp_list, kcb_list) {
1193 if (bkp->kcb_rdomain != kp->kcb_rdomain)
1194 continue;
1195
1196 if (bkp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC)
1197 pfkey_sendup(bkp, packet, 1);
1198 }
1199 SRPL_LEAVE(&sr);
1200
1201 m_freem(packet);
1202
1203 /* Paranoid */
1204 explicit_bzero(freeme, freeme_sz);
1205 free(freeme, M_PFKEY, freeme_sz);
1206 freeme = NULL;
1207 freeme_sz = 0;
1208 }
1209
1210 /* use specified rdomain */
1211 srdomain = (struct sadb_x_rdomain *) headers[SADB_X_EXT_RDOMAIN];
1212 if (srdomain) {
1213 if (!rtable_exists(srdomain->sadb_x_rdomain_dom1) ||
1214 !rtable_exists(srdomain->sadb_x_rdomain_dom2)) {
1215 rval = EINVAL;
1216 goto ret;
1217 }
1218 rdomain = srdomain->sadb_x_rdomain_dom1;
1219 }
1220
1221 smsg = (struct sadb_msg *) headers[0];
1222 switch (smsg->sadb_msg_type) {
1223 case SADB_GETSPI: /* Reserve an SPI */
1224 sa1 = malloc(sizeof (*sa1), M_PFKEY, M_NOWAIT | M_ZERO);
1225 if (sa1 == NULL) {
1226 rval = ENOMEM;
1227 goto ret;
1228 }
1229
1230 sa1->tdb_satype = smsg->sadb_msg_satype;
1231 if ((rval = pfkeyv2_get_proto_alg(sa1->tdb_satype,
1232 &sa1->tdb_sproto, 0)))
1233 goto ret;
1234
1235 import_address(&sa1->tdb_src.sa, headers[SADB_EXT_ADDRESS_SRC]);
1236 import_address(&sa1->tdb_dst.sa, headers[SADB_EXT_ADDRESS_DST]);
1237
1238 /* Find an unused SA identifier */
1239 sprng = (struct sadb_spirange *) headers[SADB_EXT_SPIRANGE];
1240 NET_LOCK();
1241 sa1->tdb_spi = reserve_spi(rdomain,
1242 sprng->sadb_spirange_min, sprng->sadb_spirange_max,
1243 &sa1->tdb_src, &sa1->tdb_dst, sa1->tdb_sproto, &rval);
1244 if (sa1->tdb_spi == 0) {
1245 NET_UNLOCK();
1246 goto ret;
1247 }
1248
1249 /* Send a message back telling what the SA (the SPI really) is */
1250 freeme_sz = sizeof(struct sadb_sa);
1251 if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT | M_ZERO))) {
1252 rval = ENOMEM;
1253 NET_UNLOCK();
1254 goto ret;
1255 }
1256
1257 headers[SADB_EXT_SPIRANGE] = NULL;
1258 headers[SADB_EXT_SA] = freeme;
1259 bckptr = freeme;
1260
1261 /* We really only care about the SPI, but we'll export the SA */
1262 export_sa((void **) &bckptr, sa1);
1263 NET_UNLOCK();
1264 break;
1265
1266 case SADB_UPDATE:
1267 ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
1268 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] +
1269 sizeof(struct sadb_address));
1270
1271 /* Either all or none of the flow must be included */
1272 if ((headers[SADB_X_EXT_SRC_FLOW] ||
1273 headers[SADB_X_EXT_PROTOCOL] ||
1274 headers[SADB_X_EXT_FLOW_TYPE] ||
1275 headers[SADB_X_EXT_DST_FLOW] ||
1276 headers[SADB_X_EXT_SRC_MASK] ||
1277 headers[SADB_X_EXT_DST_MASK]) &&
1278 !(headers[SADB_X_EXT_SRC_FLOW] &&
1279 headers[SADB_X_EXT_PROTOCOL] &&
1280 headers[SADB_X_EXT_FLOW_TYPE] &&
1281 headers[SADB_X_EXT_DST_FLOW] &&
1282 headers[SADB_X_EXT_SRC_MASK] &&
1283 headers[SADB_X_EXT_DST_MASK])) {
1284 rval = EINVAL;
1285 goto ret;
1286 }
1287 #ifdef IPSEC
1288 /* UDP encap has to be enabled and is only supported for ESP */
1289 if (headers[SADB_X_EXT_UDPENCAP] &&
1290 (!udpencap_enable ||
1291 smsg->sadb_msg_satype != SADB_SATYPE_ESP)) {
1292 rval = EINVAL;
1293 goto ret;
1294 }
1295 #endif /* IPSEC */
1296
1297 /* Find TDB */
1298 NET_LOCK();
1299 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp,
1300 SADB_X_GETSPROTO(smsg->sadb_msg_satype));
1301
1302 /* If there's no such SA, we're done */
1303 if (sa2 == NULL) {
1304 rval = ESRCH;
1305 NET_UNLOCK();
1306 goto ret;
1307 }
1308
1309 /* If this is a reserved SA */
1310 if (sa2->tdb_flags & TDBF_INVALID) {
1311 struct tdb *newsa;
1312 struct ipsecinit ii;
1313 int alg;
1314
1315 /* Create new TDB */
1316 newsa = tdb_alloc(rdomain);
1317 newsa->tdb_satype = smsg->sadb_msg_satype;
1318
1319 if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype,
1320 &newsa->tdb_sproto, &alg))) {
1321 tdb_unref(newsa);
1322 NET_UNLOCK();
1323 goto ret;
1324 }
1325
1326 /* Initialize SA */
1327 bzero(&ii, sizeof(struct ipsecinit));
1328 import_sa(newsa, headers[SADB_EXT_SA], &ii);
1329 import_address(&newsa->tdb_src.sa,
1330 headers[SADB_EXT_ADDRESS_SRC]);
1331 import_address(&newsa->tdb_dst.sa,
1332 headers[SADB_EXT_ADDRESS_DST]);
1333 import_lifetime(newsa,
1334 headers[SADB_EXT_LIFETIME_CURRENT],
1335 PFKEYV2_LIFETIME_CURRENT);
1336 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT],
1337 PFKEYV2_LIFETIME_SOFT);
1338 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD],
1339 PFKEYV2_LIFETIME_HARD);
1340 import_key(&ii, headers[SADB_EXT_KEY_AUTH],
1341 PFKEYV2_AUTHENTICATION_KEY);
1342 import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT],
1343 PFKEYV2_ENCRYPTION_KEY);
1344 newsa->tdb_ids_swapped = 1; /* only on TDB_UPDATE */
1345 import_identities(&newsa->tdb_ids,
1346 newsa->tdb_ids_swapped,
1347 headers[SADB_EXT_IDENTITY_SRC],
1348 headers[SADB_EXT_IDENTITY_DST]);
1349 if ((rval = import_flow(&newsa->tdb_filter,
1350 &newsa->tdb_filtermask,
1351 headers[SADB_X_EXT_SRC_FLOW],
1352 headers[SADB_X_EXT_SRC_MASK],
1353 headers[SADB_X_EXT_DST_FLOW],
1354 headers[SADB_X_EXT_DST_MASK],
1355 headers[SADB_X_EXT_PROTOCOL],
1356 headers[SADB_X_EXT_FLOW_TYPE]))) {
1357 tdb_unref(newsa);
1358 NET_UNLOCK();
1359 goto ret;
1360 }
1361 import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]);
1362 import_rdomain(newsa, headers[SADB_X_EXT_RDOMAIN]);
1363 #if NPF > 0
1364 import_tag(newsa, headers[SADB_X_EXT_TAG]);
1365 import_tap(newsa, headers[SADB_X_EXT_TAP]);
1366 #endif
1367 import_iface(newsa, headers[SADB_X_EXT_IFACE]);
1368
1369 /* Exclude sensitive data from reply message. */
1370 headers[SADB_EXT_KEY_AUTH] = NULL;
1371 headers[SADB_EXT_KEY_ENCRYPT] = NULL;
1372 headers[SADB_X_EXT_LOCAL_AUTH] = NULL;
1373 headers[SADB_X_EXT_REMOTE_AUTH] = NULL;
1374
1375 newsa->tdb_seq = smsg->sadb_msg_seq;
1376
1377 rval = tdb_init(newsa, alg, &ii);
1378 if (rval) {
1379 rval = EINVAL;
1380 tdb_unref(newsa);
1381 NET_UNLOCK();
1382 goto ret;
1383 }
1384
1385 newsa->tdb_cur_allocations = sa2->tdb_cur_allocations;
1386
1387 /* Delete old version of the SA, insert new one */
1388 tdb_delete(sa2);
1389
1390 tdb_addtimeouts(newsa);
1391
1392 puttdb(newsa);
1393 } else {
1394 /*
1395 * The SA is already initialized, so we're only allowed to
1396 * change lifetimes and some other information; we're
1397 * not allowed to change keys, addresses or identities.
1398 */
1399 if (headers[SADB_EXT_KEY_AUTH] ||
1400 headers[SADB_EXT_KEY_ENCRYPT] ||
1401 headers[SADB_EXT_IDENTITY_SRC] ||
1402 headers[SADB_EXT_IDENTITY_DST] ||
1403 headers[SADB_EXT_SENSITIVITY]) {
1404 rval = EINVAL;
1405 NET_UNLOCK();
1406 goto ret;
1407 }
1408
1409 import_sa(sa2, headers[SADB_EXT_SA], NULL);
1410 import_lifetime(sa2,
1411 headers[SADB_EXT_LIFETIME_CURRENT],
1412 PFKEYV2_LIFETIME_CURRENT);
1413 import_lifetime(sa2, headers[SADB_EXT_LIFETIME_SOFT],
1414 PFKEYV2_LIFETIME_SOFT);
1415 import_lifetime(sa2, headers[SADB_EXT_LIFETIME_HARD],
1416 PFKEYV2_LIFETIME_HARD);
1417 import_udpencap(sa2, headers[SADB_X_EXT_UDPENCAP]);
1418 #if NPF > 0
1419 import_tag(sa2, headers[SADB_X_EXT_TAG]);
1420 import_tap(sa2, headers[SADB_X_EXT_TAP]);
1421 #endif
1422 import_iface(sa2, headers[SADB_X_EXT_IFACE]);
1423
1424 tdb_addtimeouts(sa2);
1425
1426 if (headers[SADB_EXT_ADDRESS_SRC] ||
1427 headers[SADB_EXT_ADDRESS_PROXY]) {
1428 mtx_enter(&tdb_sadb_mtx);
1429 tdb_unlink_locked(sa2);
1430 import_address((struct sockaddr *)&sa2->tdb_src,
1431 headers[SADB_EXT_ADDRESS_SRC]);
1432 import_address((struct sockaddr *)&sa2->tdb_dst,
1433 headers[SADB_EXT_ADDRESS_PROXY]);
1434 puttdb_locked(sa2);
1435 mtx_leave(&tdb_sadb_mtx);
1436 }
1437 }
1438 NET_UNLOCK();
1439
1440 break;
1441 case SADB_ADD:
1442 ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
1443 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] +
1444 sizeof(struct sadb_address));
1445
1446 /* Either all or none of the flow must be included */
1447 if ((headers[SADB_X_EXT_SRC_FLOW] ||
1448 headers[SADB_X_EXT_PROTOCOL] ||
1449 headers[SADB_X_EXT_FLOW_TYPE] ||
1450 headers[SADB_X_EXT_DST_FLOW] ||
1451 headers[SADB_X_EXT_SRC_MASK] ||
1452 headers[SADB_X_EXT_DST_MASK]) &&
1453 !(headers[SADB_X_EXT_SRC_FLOW] &&
1454 headers[SADB_X_EXT_PROTOCOL] &&
1455 headers[SADB_X_EXT_FLOW_TYPE] &&
1456 headers[SADB_X_EXT_DST_FLOW] &&
1457 headers[SADB_X_EXT_SRC_MASK] &&
1458 headers[SADB_X_EXT_DST_MASK])) {
1459 rval = EINVAL;
1460 goto ret;
1461 }
1462 #ifdef IPSEC
1463 /* UDP encap has to be enabled and is only supported for ESP */
1464 if (headers[SADB_X_EXT_UDPENCAP] &&
1465 (!udpencap_enable ||
1466 smsg->sadb_msg_satype != SADB_SATYPE_ESP)) {
1467 rval = EINVAL;
1468 goto ret;
1469 }
1470 #endif /* IPSEC */
1471
1472 NET_LOCK();
1473 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp,
1474 SADB_X_GETSPROTO(smsg->sadb_msg_satype));
1475
1476 /* We can't add an existing SA! */
1477 if (sa2 != NULL) {
1478 rval = EEXIST;
1479 NET_UNLOCK();
1480 goto ret;
1481 }
1482
1483 /* We can only add "mature" SAs */
1484 if (ssa->sadb_sa_state != SADB_SASTATE_MATURE) {
1485 rval = EINVAL;
1486 NET_UNLOCK();
1487 goto ret;
1488 }
1489
1490 {
1491 struct tdb *newsa;
1492 struct ipsecinit ii;
1493 int alg;
1494
1495 /* Create new TDB */
1496 newsa = tdb_alloc(rdomain);
1497 newsa->tdb_satype = smsg->sadb_msg_satype;
1498
1499 if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype,
1500 &newsa->tdb_sproto, &alg))) {
1501 tdb_unref(newsa);
1502 NET_UNLOCK();
1503 goto ret;
1504 }
1505
1506 /* Initialize SA */
1507 bzero(&ii, sizeof(struct ipsecinit));
1508 import_sa(newsa, headers[SADB_EXT_SA], &ii);
1509 import_address(&newsa->tdb_src.sa,
1510 headers[SADB_EXT_ADDRESS_SRC]);
1511 import_address(&newsa->tdb_dst.sa,
1512 headers[SADB_EXT_ADDRESS_DST]);
1513
1514 import_lifetime(newsa,
1515 headers[SADB_EXT_LIFETIME_CURRENT],
1516 PFKEYV2_LIFETIME_CURRENT);
1517 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT],
1518 PFKEYV2_LIFETIME_SOFT);
1519 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD],
1520 PFKEYV2_LIFETIME_HARD);
1521
1522 import_key(&ii, headers[SADB_EXT_KEY_AUTH],
1523 PFKEYV2_AUTHENTICATION_KEY);
1524 import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT],
1525 PFKEYV2_ENCRYPTION_KEY);
1526
1527 import_identities(&newsa->tdb_ids,
1528 newsa->tdb_ids_swapped,
1529 headers[SADB_EXT_IDENTITY_SRC],
1530 headers[SADB_EXT_IDENTITY_DST]);
1531
1532 if ((rval = import_flow(&newsa->tdb_filter,
1533 &newsa->tdb_filtermask,
1534 headers[SADB_X_EXT_SRC_FLOW],
1535 headers[SADB_X_EXT_SRC_MASK],
1536 headers[SADB_X_EXT_DST_FLOW],
1537 headers[SADB_X_EXT_DST_MASK],
1538 headers[SADB_X_EXT_PROTOCOL],
1539 headers[SADB_X_EXT_FLOW_TYPE]))) {
1540 tdb_unref(newsa);
1541 NET_UNLOCK();
1542 goto ret;
1543 }
1544 import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]);
1545 import_rdomain(newsa, headers[SADB_X_EXT_RDOMAIN]);
1546 #if NPF > 0
1547 import_tag(newsa, headers[SADB_X_EXT_TAG]);
1548 import_tap(newsa, headers[SADB_X_EXT_TAP]);
1549 #endif
1550 import_iface(newsa, headers[SADB_X_EXT_IFACE]);
1551
1552 /* Exclude sensitive data from reply message. */
1553 headers[SADB_EXT_KEY_AUTH] = NULL;
1554 headers[SADB_EXT_KEY_ENCRYPT] = NULL;
1555 headers[SADB_X_EXT_LOCAL_AUTH] = NULL;
1556 headers[SADB_X_EXT_REMOTE_AUTH] = NULL;
1557
1558 newsa->tdb_seq = smsg->sadb_msg_seq;
1559
1560 rval = tdb_init(newsa, alg, &ii);
1561 if (rval) {
1562 rval = EINVAL;
1563 tdb_unref(newsa);
1564 NET_UNLOCK();
1565 goto ret;
1566 }
1567
1568 tdb_addtimeouts(newsa);
1569
1570 /* Add TDB in table */
1571 puttdb(newsa);
1572 }
1573 NET_UNLOCK();
1574
1575 break;
1576
1577 case SADB_DELETE:
1578 ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
1579 sunionp =
1580 (union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] +
1581 sizeof(struct sadb_address));
1582
1583 NET_LOCK();
1584 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp,
1585 SADB_X_GETSPROTO(smsg->sadb_msg_satype));
1586 if (sa2 == NULL) {
1587 rval = ESRCH;
1588 NET_UNLOCK();
1589 goto ret;
1590 }
1591
1592 tdb_delete(sa2);
1593 NET_UNLOCK();
1594
1595 break;
1596
1597 case SADB_X_ASKPOLICY:
1598 /* Get the relevant policy */
1599 NET_LOCK();
1600 ipa = ipsec_get_acquire(((struct sadb_x_policy *)
1601 headers[SADB_X_EXT_POLICY])->sadb_x_policy_seq);
1602 if (ipa == NULL) {
1603 rval = ESRCH;
1604 NET_UNLOCK();
1605 goto ret;
1606 }
1607
1608 rval = pfkeyv2_policy(ipa, headers, &freeme, &freeme_sz);
1609 NET_UNLOCK();
1610 ipsec_unref_acquire(ipa);
1611 if (rval)
1612 mode = PFKEYV2_SENDMESSAGE_UNICAST;
1613
1614 break;
1615
1616 case SADB_GET:
1617 ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
1618 sunionp =
1619 (union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] +
1620 sizeof(struct sadb_address));
1621
1622 NET_LOCK();
1623 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp,
1624 SADB_X_GETSPROTO(smsg->sadb_msg_satype));
1625 if (sa2 == NULL) {
1626 rval = ESRCH;
1627 NET_UNLOCK();
1628 goto ret;
1629 }
1630
1631 rval = pfkeyv2_get(sa2, headers, &freeme, &freeme_sz, NULL);
1632 NET_UNLOCK();
1633 if (rval)
1634 mode = PFKEYV2_SENDMESSAGE_UNICAST;
1635
1636 break;
1637
1638 case SADB_REGISTER:
1639 keylock(kp);
1640 if (!(kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED)) {
1641 kp->kcb_flags |= PFKEYV2_SOCKETFLAGS_REGISTERED;
1642 mtx_enter(&pfkeyv2_mtx);
1643 nregistered++;
1644 mtx_leave(&pfkeyv2_mtx);
1645 }
1646 keyunlock(kp);
1647
1648 freeme_sz = sizeof(struct sadb_supported) + sizeof(ealgs);
1649 if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT | M_ZERO))) {
1650 rval = ENOMEM;
1651 goto ret;
1652 }
1653
1654 ssup = (struct sadb_supported *) freeme;
1655 ssup->sadb_supported_len = freeme_sz / sizeof(uint64_t);
1656
1657 {
1658 void *p = freeme + sizeof(struct sadb_supported);
1659
1660 bcopy(&ealgs[0], p, sizeof(ealgs));
1661 }
1662
1663 headers[SADB_EXT_SUPPORTED_ENCRYPT] = freeme;
1664
1665 freeme2_sz = sizeof(struct sadb_supported) + sizeof(aalgs);
1666 if (!(freeme2 = malloc(freeme2_sz, M_PFKEY,
1667 M_NOWAIT | M_ZERO))) {
1668 rval = ENOMEM;
1669 goto ret;
1670 }
1671
1672 /* Keep track what this socket has registered for */
1673 keylock(kp);
1674 kp->kcb_reg |=
1675 (1 << ((struct sadb_msg *)message)->sadb_msg_satype);
1676 keyunlock(kp);
1677
1678 ssup = (struct sadb_supported *) freeme2;
1679 ssup->sadb_supported_len = freeme2_sz / sizeof(uint64_t);
1680
1681 {
1682 void *p = freeme2 + sizeof(struct sadb_supported);
1683
1684 bcopy(&aalgs[0], p, sizeof(aalgs));
1685 }
1686
1687 headers[SADB_EXT_SUPPORTED_AUTH] = freeme2;
1688
1689 freeme3_sz = sizeof(struct sadb_supported) + sizeof(calgs);
1690 if (!(freeme3 = malloc(freeme3_sz, M_PFKEY,
1691 M_NOWAIT | M_ZERO))) {
1692 rval = ENOMEM;
1693 goto ret;
1694 }
1695
1696 ssup = (struct sadb_supported *) freeme3;
1697 ssup->sadb_supported_len = freeme3_sz / sizeof(uint64_t);
1698
1699 {
1700 void *p = freeme3 + sizeof(struct sadb_supported);
1701
1702 bcopy(&calgs[0], p, sizeof(calgs));
1703 }
1704
1705 headers[SADB_X_EXT_SUPPORTED_COMP] = freeme3;
1706
1707 break;
1708
1709 case SADB_ACQUIRE:
1710 case SADB_EXPIRE:
1711 /* Nothing to handle */
1712 rval = 0;
1713 break;
1714
1715 case SADB_FLUSH:
1716 rval = 0;
1717
1718 NET_LOCK();
1719 switch (smsg->sadb_msg_satype) {
1720 case SADB_SATYPE_UNSPEC:
1721 spd_table_walk(rdomain, pfkeyv2_policy_flush, NULL);
1722 /* FALLTHROUGH */
1723 case SADB_SATYPE_AH:
1724 case SADB_SATYPE_ESP:
1725 case SADB_X_SATYPE_IPIP:
1726 case SADB_X_SATYPE_IPCOMP:
1727 #ifdef TCP_SIGNATURE
1728 case SADB_X_SATYPE_TCPSIGNATURE:
1729 #endif /* TCP_SIGNATURE */
1730 tdb_walk(rdomain, pfkeyv2_sa_flush,
1731 (u_int8_t *) &(smsg->sadb_msg_satype));
1732
1733 break;
1734
1735 default:
1736 rval = EINVAL; /* Unknown/unsupported type */
1737 }
1738 NET_UNLOCK();
1739
1740 break;
1741
1742 case SADB_DUMP:
1743 {
1744 struct dump_state dump_state;
1745 dump_state.sadb_msg = (struct sadb_msg *) headers[0];
1746 dump_state.socket = so;
1747
1748 NET_LOCK();
1749 rval = tdb_walk(rdomain, pfkeyv2_dump_walker, &dump_state);
1750 NET_UNLOCK();
1751 if (!rval)
1752 goto realret;
1753 if ((rval == ENOMEM) || (rval == ENOBUFS))
1754 rval = 0;
1755 }
1756 break;
1757
1758 case SADB_X_GRPSPIS:
1759 {
1760 struct tdb *tdb1, *tdb2, *tdb3;
1761 struct sadb_protocol *sa_proto;
1762
1763 ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
1764 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] +
1765 sizeof(struct sadb_address));
1766
1767 NET_LOCK();
1768 tdb1 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp,
1769 SADB_X_GETSPROTO(smsg->sadb_msg_satype));
1770 if (tdb1 == NULL) {
1771 rval = ESRCH;
1772 NET_UNLOCK();
1773 goto ret;
1774 }
1775
1776 ssa = (struct sadb_sa *) headers[SADB_X_EXT_SA2];
1777 sunionp = (union sockaddr_union *) (headers[SADB_X_EXT_DST2] +
1778 sizeof(struct sadb_address));
1779 sa_proto = (struct sadb_protocol *) headers[SADB_X_EXT_SATYPE2];
1780
1781 /* optionally fetch tdb2 from rdomain2 */
1782 tdb2 = gettdb(srdomain ? srdomain->sadb_x_rdomain_dom2 : rdomain,
1783 ssa->sadb_sa_spi, sunionp,
1784 SADB_X_GETSPROTO(sa_proto->sadb_protocol_proto));
1785 if (tdb2 == NULL) {
1786 tdb_unref(tdb1);
1787 rval = ESRCH;
1788 NET_UNLOCK();
1789 goto ret;
1790 }
1791
1792 /* Detect cycles */
1793 for (tdb3 = tdb2; tdb3; tdb3 = tdb3->tdb_onext)
1794 if (tdb3 == tdb1) {
1795 tdb_unref(tdb1);
1796 tdb_unref(tdb2);
1797 rval = ESRCH;
1798 NET_UNLOCK();
1799 goto ret;
1800 }
1801
1802 /* Maintenance */
1803 if ((tdb1->tdb_onext) &&
1804 (tdb1->tdb_onext->tdb_inext == tdb1)) {
1805 tdb_unref(tdb1->tdb_onext->tdb_inext);
1806 tdb1->tdb_onext->tdb_inext = NULL;
1807 }
1808
1809 if ((tdb2->tdb_inext) &&
1810 (tdb2->tdb_inext->tdb_onext == tdb2)) {
1811 tdb_unref(tdb2->tdb_inext->tdb_onext);
1812 tdb2->tdb_inext->tdb_onext = NULL;
1813 }
1814
1815 /* Link them */
1816 tdb1->tdb_onext = tdb2;
1817 tdb2->tdb_inext = tdb1;
1818 NET_UNLOCK();
1819 }
1820 break;
1821
1822 case SADB_X_DELFLOW:
1823 delflag = 1;
1824 /*FALLTHROUGH*/
1825 case SADB_X_ADDFLOW:
1826 {
1827 struct sadb_protocol *sab;
1828 union sockaddr_union *ssrc;
1829 int exists = 0;
1830
1831 NET_LOCK();
1832 if ((rnh = spd_table_add(rdomain)) == NULL) {
1833 rval = ENOMEM;
1834 NET_UNLOCK();
1835 goto ret;
1836 }
1837
1838 sab = (struct sadb_protocol *) headers[SADB_X_EXT_FLOW_TYPE];
1839
1840 if ((sab->sadb_protocol_direction != IPSP_DIRECTION_IN) &&
1841 (sab->sadb_protocol_direction != IPSP_DIRECTION_OUT)) {
1842 rval = EINVAL;
1843 NET_UNLOCK();
1844 goto ret;
1845 }
1846
1847 /* If the security protocol wasn't specified, pretend it was ESP */
1848 if (smsg->sadb_msg_satype == 0)
1849 smsg->sadb_msg_satype = SADB_SATYPE_ESP;
1850
1851 if (headers[SADB_EXT_ADDRESS_DST])
1852 sunionp = (union sockaddr_union *)
1853 (headers[SADB_EXT_ADDRESS_DST] +
1854 sizeof(struct sadb_address));
1855 else
1856 sunionp = NULL;
1857
1858 if (headers[SADB_EXT_ADDRESS_SRC])
1859 ssrc = (union sockaddr_union *)
1860 (headers[SADB_EXT_ADDRESS_SRC] +
1861 sizeof(struct sadb_address));
1862 else
1863 ssrc = NULL;
1864
1865 if ((rval = import_flow(&encapdst, &encapnetmask,
1866 headers[SADB_X_EXT_SRC_FLOW], headers[SADB_X_EXT_SRC_MASK],
1867 headers[SADB_X_EXT_DST_FLOW], headers[SADB_X_EXT_DST_MASK],
1868 headers[SADB_X_EXT_PROTOCOL],
1869 headers[SADB_X_EXT_FLOW_TYPE]))) {
1870 NET_UNLOCK();
1871 goto ret;
1872 }
1873
1874 /* Determine whether the exact same SPD entry already exists. */
1875 if ((rn = rn_match(&encapdst, rnh)) != NULL) {
1876 ipo = (struct ipsec_policy *)rn;
1877
1878 /* Verify that the entry is identical */
1879 if (bcmp(&ipo->ipo_addr, &encapdst,
1880 sizeof(struct sockaddr_encap)) ||
1881 bcmp(&ipo->ipo_mask, &encapnetmask,
1882 sizeof(struct sockaddr_encap)))
1883 ipo = NULL; /* Fall through */
1884 else
1885 exists = 1;
1886 } else
1887 ipo = NULL;
1888
1889 /*
1890 * If the existing policy is static, only delete or update
1891 * it if the new one is also static.
1892 */
1893 if (exists && (ipo->ipo_flags & IPSP_POLICY_STATIC)) {
1894 if (!(sab->sadb_protocol_flags &
1895 SADB_X_POLICYFLAGS_POLICY)) {
1896 NET_UNLOCK();
1897 goto ret;
1898 }
1899 }
1900
1901 /* Delete ? */
1902 if (delflag) {
1903 if (exists) {
1904 rval = ipsec_delete_policy(ipo);
1905 NET_UNLOCK();
1906 goto ret;
1907 }
1908
1909 /* If we were asked to delete something non-existent, error. */
1910 rval = ESRCH;
1911 NET_UNLOCK();
1912 break;
1913 }
1914
1915 if (!exists) {
1916 /* Allocate policy entry */
1917 ipo = pool_get(&ipsec_policy_pool, PR_NOWAIT|PR_ZERO);
1918 if (ipo == NULL) {
1919 rval = ENOMEM;
1920 NET_UNLOCK();
1921 goto ret;
1922 }
1923 }
1924
1925 switch (sab->sadb_protocol_proto) {
1926 case SADB_X_FLOW_TYPE_USE:
1927 ipo->ipo_type = IPSP_IPSEC_USE;
1928 break;
1929
1930 case SADB_X_FLOW_TYPE_ACQUIRE:
1931 ipo->ipo_type = IPSP_IPSEC_ACQUIRE;
1932 break;
1933
1934 case SADB_X_FLOW_TYPE_REQUIRE:
1935 ipo->ipo_type = IPSP_IPSEC_REQUIRE;
1936 break;
1937
1938 case SADB_X_FLOW_TYPE_DENY:
1939 ipo->ipo_type = IPSP_DENY;
1940 break;
1941
1942 case SADB_X_FLOW_TYPE_BYPASS:
1943 ipo->ipo_type = IPSP_PERMIT;
1944 break;
1945
1946 case SADB_X_FLOW_TYPE_DONTACQ:
1947 ipo->ipo_type = IPSP_IPSEC_DONTACQ;
1948 break;
1949
1950 default:
1951 if (!exists)
1952 pool_put(&ipsec_policy_pool, ipo);
1953 else
1954 ipsec_delete_policy(ipo);
1955
1956 rval = EINVAL;
1957 NET_UNLOCK();
1958 goto ret;
1959 }
1960
1961 if (sab->sadb_protocol_flags & SADB_X_POLICYFLAGS_POLICY)
1962 ipo->ipo_flags |= IPSP_POLICY_STATIC;
1963
1964 if (sunionp)
1965 bcopy(sunionp, &ipo->ipo_dst,
1966 sizeof(union sockaddr_union));
1967 else
1968 bzero(&ipo->ipo_dst, sizeof(union sockaddr_union));
1969
1970 if (ssrc)
1971 bcopy(ssrc, &ipo->ipo_src,
1972 sizeof(union sockaddr_union));
1973 else
1974 bzero(&ipo->ipo_src, sizeof(union sockaddr_union));
1975
1976 ipo->ipo_sproto = SADB_X_GETSPROTO(smsg->sadb_msg_satype);
1977
1978 if (ipo->ipo_ids) {
1979 ipsp_ids_free(ipo->ipo_ids);
1980 ipo->ipo_ids = NULL;
1981 }
1982
1983 if ((sid = headers[SADB_EXT_IDENTITY_SRC]) != NULL &&
1984 (did = headers[SADB_EXT_IDENTITY_DST]) != NULL) {
1985 import_identities(&ipo->ipo_ids, 0, sid, did);
1986 if (ipo->ipo_ids == NULL) {
1987 if (exists)
1988 ipsec_delete_policy(ipo);
1989 else
1990 pool_put(&ipsec_policy_pool, ipo);
1991 rval = ENOBUFS;
1992 NET_UNLOCK();
1993 goto ret;
1994 }
1995 }
1996
1997 /* Flow type */
1998 if (!exists) {
1999 /* Initialize policy entry */
2000 bcopy(&encapdst, &ipo->ipo_addr,
2001 sizeof(struct sockaddr_encap));
2002 bcopy(&encapnetmask, &ipo->ipo_mask,
2003 sizeof(struct sockaddr_encap));
2004
2005 TAILQ_INIT(&ipo->ipo_acquires);
2006 ipo->ipo_rdomain = rdomain;
2007 refcnt_init(&ipo->ipo_refcnt);
2008
2009 /* Add SPD entry */
2010 if ((rnh = spd_table_get(rdomain)) == NULL ||
2011 (rn = rn_addroute((caddr_t)&ipo->ipo_addr,
2012 (caddr_t)&ipo->ipo_mask, rnh,
2013 ipo->ipo_nodes, 0)) == NULL) {
2014 /* Remove from linked list of policies on TDB */
2015 mtx_enter(&ipo_tdb_mtx);
2016 if (ipo->ipo_tdb != NULL) {
2017 TAILQ_REMOVE(
2018 &ipo->ipo_tdb->tdb_policy_head,
2019 ipo, ipo_tdb_next);
2020 tdb_unref(ipo->ipo_tdb);
2021 ipo->ipo_tdb = NULL;
2022 }
2023 mtx_leave(&ipo_tdb_mtx);
2024 if (ipo->ipo_ids)
2025 ipsp_ids_free(ipo->ipo_ids);
2026 pool_put(&ipsec_policy_pool, ipo);
2027 NET_UNLOCK();
2028 goto ret;
2029 }
2030 TAILQ_INSERT_HEAD(&ipsec_policy_head, ipo, ipo_list);
2031 ipsec_in_use++;
2032 } else {
2033 ipo->ipo_last_searched = ipo->ipo_flags = 0;
2034 }
2035 NET_UNLOCK();
2036 }
2037 break;
2038
2039 case SADB_X_PROMISC:
2040 if (len >= 2 * sizeof(struct sadb_msg)) {
2041 struct mbuf *packet;
2042
2043 if ((rval = pfdatatopacket(message, len, &packet)) != 0)
2044 goto ret;
2045
2046 SRPL_FOREACH(bkp, &sr, &pkptable.pkp_list, kcb_list) {
2047 if (bkp == kp ||
2048 bkp->kcb_rdomain != kp->kcb_rdomain)
2049 continue;
2050
2051 if (!smsg->sadb_msg_seq ||
2052 (smsg->sadb_msg_seq == kp->kcb_pid)) {
2053 pfkey_sendup(bkp, packet, 1);
2054 }
2055 }
2056 SRPL_LEAVE(&sr);
2057
2058 m_freem(packet);
2059 } else {
2060 if (len != sizeof(struct sadb_msg)) {
2061 rval = EINVAL;
2062 goto ret;
2063 }
2064
2065 keylock(kp);
2066 i = (kp->kcb_flags &
2067 PFKEYV2_SOCKETFLAGS_PROMISC) ? 1 : 0;
2068 j = smsg->sadb_msg_satype ? 1 : 0;
2069
2070 if (i ^ j) {
2071 if (j) {
2072 kp->kcb_flags |=
2073 PFKEYV2_SOCKETFLAGS_PROMISC;
2074 mtx_enter(&pfkeyv2_mtx);
2075 npromisc++;
2076 mtx_leave(&pfkeyv2_mtx);
2077 } else {
2078 kp->kcb_flags &=
2079 ~PFKEYV2_SOCKETFLAGS_PROMISC;
2080 mtx_enter(&pfkeyv2_mtx);
2081 npromisc--;
2082 mtx_leave(&pfkeyv2_mtx);
2083 }
2084 }
2085 keyunlock(kp);
2086 }
2087
2088 break;
2089
2090 default:
2091 rval = EINVAL;
2092 goto ret;
2093 }
2094
2095 ret:
2096 if (rval) {
2097 if ((rval == EINVAL) || (rval == ENOMEM) || (rval == ENOBUFS))
2098 goto realret;
2099
2100 for (i = 1; i <= SADB_EXT_MAX; i++)
2101 headers[i] = NULL;
2102
2103 smsg->sadb_msg_errno = abs(rval);
2104 } else {
2105 uint64_t seen = 0LL;
2106
2107 for (i = 1; i <= SADB_EXT_MAX; i++)
2108 if (headers[i])
2109 seen |= (1LL << i);
2110
2111 if ((seen & sadb_exts_allowed_out[smsg->sadb_msg_type])
2112 != seen) {
2113 rval = EPERM;
2114 goto realret;
2115 }
2116
2117 if ((seen & sadb_exts_required_out[smsg->sadb_msg_type]) !=
2118 sadb_exts_required_out[smsg->sadb_msg_type]) {
2119 rval = EPERM;
2120 goto realret;
2121 }
2122 }
2123
2124 rval = pfkeyv2_sendmessage(headers, mode, so, 0, 0, kp->kcb_rdomain);
2125
2126 realret:
2127
2128 if (freeme != NULL)
2129 explicit_bzero(freeme, freeme_sz);
2130 free(freeme, M_PFKEY, freeme_sz);
2131 free(freeme2, M_PFKEY, freeme2_sz);
2132 free(freeme3, M_PFKEY, freeme3_sz);
2133
2134 explicit_bzero(message, len);
2135 free(message, M_PFKEY, len);
2136
2137 free(sa1, M_PFKEY, sizeof(*sa1));
2138
2139 NET_LOCK();
2140 tdb_unref(sa2);
2141 NET_UNLOCK();
2142
2143 return (rval);
2144 }
2145
2146 /*
2147 * Send an ACQUIRE message to key management, to get a new SA.
2148 */
2149 int
pfkeyv2_acquire(struct ipsec_policy * ipo,union sockaddr_union * gw,union sockaddr_union * laddr,u_int32_t * seq,struct sockaddr_encap * ddst)2150 pfkeyv2_acquire(struct ipsec_policy *ipo, union sockaddr_union *gw,
2151 union sockaddr_union *laddr, u_int32_t *seq, struct sockaddr_encap *ddst)
2152 {
2153 void *p, *headers[SADB_EXT_MAX + 1], *buffer = NULL;
2154 struct sadb_comb *sadb_comb;
2155 struct sadb_address *sadd;
2156 struct sadb_prop *sa_prop;
2157 struct sadb_msg *smsg;
2158 int rval = 0;
2159 int i, j, registered;
2160
2161 mtx_enter(&pfkeyv2_mtx);
2162 *seq = pfkeyv2_seq++;
2163
2164 registered = nregistered;
2165 mtx_leave(&pfkeyv2_mtx);
2166
2167 if (!registered) {
2168 rval = ESRCH;
2169 goto ret;
2170 }
2171
2172 /* How large a buffer do we need... XXX we only do one proposal for now */
2173 i = sizeof(struct sadb_msg) +
2174 (laddr == NULL ? 0 : sizeof(struct sadb_address) +
2175 PADUP(ipo->ipo_src.sa.sa_len)) +
2176 sizeof(struct sadb_address) + PADUP(gw->sa.sa_len) +
2177 sizeof(struct sadb_prop) + 1 * sizeof(struct sadb_comb);
2178
2179 if (ipo->ipo_ids) {
2180 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_local->len);
2181 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_remote->len);
2182 }
2183
2184 /* Allocate */
2185 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) {
2186 rval = ENOMEM;
2187 goto ret;
2188 }
2189
2190 bzero(headers, sizeof(headers));
2191
2192 buffer = p;
2193
2194 headers[0] = p;
2195 p += sizeof(struct sadb_msg);
2196
2197 smsg = (struct sadb_msg *) headers[0];
2198 smsg->sadb_msg_version = PF_KEY_V2;
2199 smsg->sadb_msg_type = SADB_ACQUIRE;
2200 smsg->sadb_msg_len = i / sizeof(uint64_t);
2201 smsg->sadb_msg_seq = *seq;
2202
2203 if (ipo->ipo_sproto == IPPROTO_ESP)
2204 smsg->sadb_msg_satype = SADB_SATYPE_ESP;
2205 else if (ipo->ipo_sproto == IPPROTO_AH)
2206 smsg->sadb_msg_satype = SADB_SATYPE_AH;
2207 else if (ipo->ipo_sproto == IPPROTO_IPCOMP)
2208 smsg->sadb_msg_satype = SADB_X_SATYPE_IPCOMP;
2209
2210 if (laddr) {
2211 headers[SADB_EXT_ADDRESS_SRC] = p;
2212 p += sizeof(struct sadb_address) + PADUP(laddr->sa.sa_len);
2213 sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_SRC];
2214 sadd->sadb_address_len = (sizeof(struct sadb_address) +
2215 laddr->sa.sa_len + sizeof(uint64_t) - 1) /
2216 sizeof(uint64_t);
2217 bcopy(laddr, headers[SADB_EXT_ADDRESS_SRC] +
2218 sizeof(struct sadb_address), laddr->sa.sa_len);
2219 }
2220
2221 headers[SADB_EXT_ADDRESS_DST] = p;
2222 p += sizeof(struct sadb_address) + PADUP(gw->sa.sa_len);
2223 sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_DST];
2224 sadd->sadb_address_len = (sizeof(struct sadb_address) +
2225 gw->sa.sa_len + sizeof(uint64_t) - 1) / sizeof(uint64_t);
2226 bcopy(gw, headers[SADB_EXT_ADDRESS_DST] + sizeof(struct sadb_address),
2227 gw->sa.sa_len);
2228
2229 if (ipo->ipo_ids)
2230 export_identities(&p, ipo->ipo_ids, 0, headers);
2231
2232 headers[SADB_EXT_PROPOSAL] = p;
2233 p += sizeof(struct sadb_prop);
2234 sa_prop = (struct sadb_prop *) headers[SADB_EXT_PROPOSAL];
2235 sa_prop->sadb_prop_num = 1; /* XXX One proposal only */
2236 sa_prop->sadb_prop_len = (sizeof(struct sadb_prop) +
2237 (sizeof(struct sadb_comb) * sa_prop->sadb_prop_num)) /
2238 sizeof(uint64_t);
2239
2240 sadb_comb = p;
2241
2242 /* XXX Should actually ask the crypto layer what's supported */
2243 for (j = 0; j < sa_prop->sadb_prop_num; j++) {
2244 sadb_comb->sadb_comb_flags = 0;
2245 #ifdef IPSEC
2246 if (ipsec_require_pfs)
2247 sadb_comb->sadb_comb_flags |= SADB_SAFLAGS_PFS;
2248
2249 /* Set the encryption algorithm */
2250 if (ipo->ipo_sproto == IPPROTO_ESP) {
2251 if (!strncasecmp(ipsec_def_enc, "aes",
2252 sizeof("aes"))) {
2253 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AES;
2254 sadb_comb->sadb_comb_encrypt_minbits = 128;
2255 sadb_comb->sadb_comb_encrypt_maxbits = 256;
2256 } else if (!strncasecmp(ipsec_def_enc, "aesctr",
2257 sizeof("aesctr"))) {
2258 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AESCTR;
2259 sadb_comb->sadb_comb_encrypt_minbits = 128+32;
2260 sadb_comb->sadb_comb_encrypt_maxbits = 256+32;
2261 } else if (!strncasecmp(ipsec_def_enc, "3des",
2262 sizeof("3des"))) {
2263 sadb_comb->sadb_comb_encrypt = SADB_EALG_3DESCBC;
2264 sadb_comb->sadb_comb_encrypt_minbits = 192;
2265 sadb_comb->sadb_comb_encrypt_maxbits = 192;
2266 } else if (!strncasecmp(ipsec_def_enc, "blowfish",
2267 sizeof("blowfish"))) {
2268 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_BLF;
2269 sadb_comb->sadb_comb_encrypt_minbits = 40;
2270 sadb_comb->sadb_comb_encrypt_maxbits = BLF_MAXKEYLEN * 8;
2271 } else if (!strncasecmp(ipsec_def_enc, "cast128",
2272 sizeof("cast128"))) {
2273 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_CAST;
2274 sadb_comb->sadb_comb_encrypt_minbits = 40;
2275 sadb_comb->sadb_comb_encrypt_maxbits = 128;
2276 }
2277 } else if (ipo->ipo_sproto == IPPROTO_IPCOMP) {
2278 /* Set the compression algorithm */
2279 if (!strncasecmp(ipsec_def_comp, "deflate",
2280 sizeof("deflate"))) {
2281 sadb_comb->sadb_comb_encrypt = SADB_X_CALG_DEFLATE;
2282 sadb_comb->sadb_comb_encrypt_minbits = 0;
2283 sadb_comb->sadb_comb_encrypt_maxbits = 0;
2284 }
2285 }
2286
2287 /* Set the authentication algorithm */
2288 if (!strncasecmp(ipsec_def_auth, "hmac-sha1",
2289 sizeof("hmac-sha1"))) {
2290 sadb_comb->sadb_comb_auth = SADB_AALG_SHA1HMAC;
2291 sadb_comb->sadb_comb_auth_minbits = 160;
2292 sadb_comb->sadb_comb_auth_maxbits = 160;
2293 } else if (!strncasecmp(ipsec_def_auth, "hmac-ripemd160",
2294 sizeof("hmac_ripemd160"))) {
2295 sadb_comb->sadb_comb_auth = SADB_X_AALG_RIPEMD160HMAC;
2296 sadb_comb->sadb_comb_auth_minbits = 160;
2297 sadb_comb->sadb_comb_auth_maxbits = 160;
2298 } else if (!strncasecmp(ipsec_def_auth, "hmac-md5",
2299 sizeof("hmac-md5"))) {
2300 sadb_comb->sadb_comb_auth = SADB_AALG_MD5HMAC;
2301 sadb_comb->sadb_comb_auth_minbits = 128;
2302 sadb_comb->sadb_comb_auth_maxbits = 128;
2303 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-256",
2304 sizeof("hmac-sha2-256"))) {
2305 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_256;
2306 sadb_comb->sadb_comb_auth_minbits = 256;
2307 sadb_comb->sadb_comb_auth_maxbits = 256;
2308 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-384",
2309 sizeof("hmac-sha2-384"))) {
2310 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_384;
2311 sadb_comb->sadb_comb_auth_minbits = 384;
2312 sadb_comb->sadb_comb_auth_maxbits = 384;
2313 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-512",
2314 sizeof("hmac-sha2-512"))) {
2315 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_512;
2316 sadb_comb->sadb_comb_auth_minbits = 512;
2317 sadb_comb->sadb_comb_auth_maxbits = 512;
2318 }
2319
2320 sadb_comb->sadb_comb_soft_allocations = ipsec_soft_allocations;
2321 sadb_comb->sadb_comb_hard_allocations = ipsec_exp_allocations;
2322
2323 sadb_comb->sadb_comb_soft_bytes = ipsec_soft_bytes;
2324 sadb_comb->sadb_comb_hard_bytes = ipsec_exp_bytes;
2325
2326 sadb_comb->sadb_comb_soft_addtime = ipsec_soft_timeout;
2327 sadb_comb->sadb_comb_hard_addtime = ipsec_exp_timeout;
2328
2329 sadb_comb->sadb_comb_soft_usetime = ipsec_soft_first_use;
2330 sadb_comb->sadb_comb_hard_usetime = ipsec_exp_first_use;
2331 #endif
2332 sadb_comb++;
2333 }
2334
2335 /* Send the ACQUIRE message to all compliant registered listeners. */
2336 if ((rval = pfkeyv2_sendmessage(headers,
2337 PFKEYV2_SENDMESSAGE_REGISTERED, NULL, smsg->sadb_msg_satype, 0,
2338 ipo->ipo_rdomain)) != 0)
2339 goto ret;
2340
2341 rval = 0;
2342 ret:
2343 if (buffer != NULL) {
2344 explicit_bzero(buffer, i);
2345 free(buffer, M_PFKEY, i);
2346 }
2347
2348 return (rval);
2349 }
2350
2351 /*
2352 * Notify key management that an expiration went off. The second argument
2353 * specifies the type of expiration (soft or hard).
2354 */
2355 int
pfkeyv2_expire(struct tdb * tdb,u_int16_t type)2356 pfkeyv2_expire(struct tdb *tdb, u_int16_t type)
2357 {
2358 void *p, *headers[SADB_EXT_MAX+1], *buffer = NULL;
2359 struct sadb_msg *smsg;
2360 int rval = 0;
2361 int i;
2362
2363 NET_ASSERT_LOCKED();
2364
2365 switch (tdb->tdb_sproto) {
2366 case IPPROTO_AH:
2367 case IPPROTO_ESP:
2368 case IPPROTO_IPIP:
2369 case IPPROTO_IPCOMP:
2370 #ifdef TCP_SIGNATURE
2371 case IPPROTO_TCP:
2372 #endif /* TCP_SIGNATURE */
2373 break;
2374
2375 default:
2376 rval = EOPNOTSUPP;
2377 goto ret;
2378 }
2379
2380 i = sizeof(struct sadb_msg) + sizeof(struct sadb_sa) +
2381 2 * sizeof(struct sadb_lifetime) +
2382 sizeof(struct sadb_address) + PADUP(tdb->tdb_src.sa.sa_len) +
2383 sizeof(struct sadb_address) + PADUP(tdb->tdb_dst.sa.sa_len);
2384
2385 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) {
2386 rval = ENOMEM;
2387 goto ret;
2388 }
2389
2390 bzero(headers, sizeof(headers));
2391
2392 buffer = p;
2393
2394 headers[0] = p;
2395 p += sizeof(struct sadb_msg);
2396
2397 smsg = (struct sadb_msg *) headers[0];
2398 smsg->sadb_msg_version = PF_KEY_V2;
2399 smsg->sadb_msg_type = SADB_EXPIRE;
2400 smsg->sadb_msg_satype = tdb->tdb_satype;
2401 smsg->sadb_msg_len = i / sizeof(uint64_t);
2402
2403 mtx_enter(&pfkeyv2_mtx);
2404 smsg->sadb_msg_seq = pfkeyv2_seq++;
2405 mtx_leave(&pfkeyv2_mtx);
2406
2407 headers[SADB_EXT_SA] = p;
2408 export_sa(&p, tdb);
2409
2410 headers[SADB_EXT_LIFETIME_CURRENT] = p;
2411 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_CURRENT);
2412
2413 headers[type] = p;
2414 export_lifetime(&p, tdb, type == SADB_EXT_LIFETIME_SOFT ?
2415 PFKEYV2_LIFETIME_SOFT : PFKEYV2_LIFETIME_HARD);
2416
2417 headers[SADB_EXT_ADDRESS_SRC] = p;
2418 export_address(&p, &tdb->tdb_src.sa);
2419
2420 headers[SADB_EXT_ADDRESS_DST] = p;
2421 export_address(&p, &tdb->tdb_dst.sa);
2422
2423 if ((rval = pfkeyv2_sendmessage(headers, PFKEYV2_SENDMESSAGE_BROADCAST,
2424 NULL, 0, 0, tdb->tdb_rdomain)) != 0)
2425 goto ret;
2426 /* XXX */
2427 if (tdb->tdb_rdomain != tdb->tdb_rdomain_post)
2428 if ((rval = pfkeyv2_sendmessage(headers,
2429 PFKEYV2_SENDMESSAGE_BROADCAST, NULL, 0, 0,
2430 tdb->tdb_rdomain_post)) != 0)
2431 goto ret;
2432
2433 rval = 0;
2434
2435 ret:
2436 if (buffer != NULL) {
2437 explicit_bzero(buffer, i);
2438 free(buffer, M_PFKEY, i);
2439 }
2440
2441 return (rval);
2442 }
2443
2444 struct pfkeyv2_sysctl_walk {
2445 void *w_where;
2446 size_t w_len;
2447 int w_op;
2448 u_int8_t w_satype;
2449 };
2450
2451 int
pfkeyv2_sysctl_walker(struct tdb * tdb,void * arg,int last)2452 pfkeyv2_sysctl_walker(struct tdb *tdb, void *arg, int last)
2453 {
2454 struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg;
2455 void *buffer = NULL;
2456 int error = 0;
2457 int usedlen, buflen, i;
2458
2459 if (w->w_satype != SADB_SATYPE_UNSPEC &&
2460 w->w_satype != tdb->tdb_satype)
2461 return (0);
2462
2463 if (w->w_where) {
2464 void *headers[SADB_EXT_MAX+1];
2465 struct sadb_msg msg;
2466
2467 bzero(headers, sizeof(headers));
2468 if ((error = pfkeyv2_get(tdb, headers, &buffer, &buflen,
2469 &usedlen)) != 0)
2470 goto done;
2471 if (w->w_len < sizeof(msg) + usedlen) {
2472 error = ENOMEM;
2473 goto done;
2474 }
2475 /* prepend header */
2476 bzero(&msg, sizeof(msg));
2477 msg.sadb_msg_version = PF_KEY_V2;
2478 msg.sadb_msg_satype = tdb->tdb_satype;
2479 msg.sadb_msg_type = SADB_DUMP;
2480 msg.sadb_msg_len = (sizeof(msg) + usedlen) / sizeof(uint64_t);
2481 if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0)
2482 goto done;
2483 w->w_where += sizeof(msg);
2484 w->w_len -= sizeof(msg);
2485 /* set extension type */
2486 for (i = 1; i <= SADB_EXT_MAX; i++)
2487 if (headers[i])
2488 ((struct sadb_ext *)
2489 headers[i])->sadb_ext_type = i;
2490 if ((error = copyout(buffer, w->w_where, usedlen)) != 0)
2491 goto done;
2492 w->w_where += usedlen;
2493 w->w_len -= usedlen;
2494 } else {
2495 if ((error = pfkeyv2_get(tdb, NULL, NULL, &buflen, NULL)) != 0)
2496 return (error);
2497 w->w_len += buflen;
2498 w->w_len += sizeof(struct sadb_msg);
2499 }
2500
2501 done:
2502 if (buffer != NULL) {
2503 explicit_bzero(buffer, buflen);
2504 free(buffer, M_PFKEY, buflen);
2505 }
2506 return (error);
2507 }
2508
2509 int
pfkeyv2_dump_policy(struct ipsec_policy * ipo,void ** headers,void ** buffer,int * lenp)2510 pfkeyv2_dump_policy(struct ipsec_policy *ipo, void **headers, void **buffer,
2511 int *lenp)
2512 {
2513 int i, rval, perm;
2514 void *p;
2515
2516 /* Find how much space we need. */
2517 i = 2 * sizeof(struct sadb_protocol);
2518
2519 /* We'll need four of them: src, src mask, dst, dst mask. */
2520 switch (ipo->ipo_addr.sen_type) {
2521 case SENT_IP4:
2522 i += 4 * PADUP(sizeof(struct sockaddr_in));
2523 i += 4 * sizeof(struct sadb_address);
2524 break;
2525 #ifdef INET6
2526 case SENT_IP6:
2527 i += 4 * PADUP(sizeof(struct sockaddr_in6));
2528 i += 4 * sizeof(struct sadb_address);
2529 break;
2530 #endif /* INET6 */
2531 default:
2532 return (EINVAL);
2533 }
2534
2535 /* Local address, might be zeroed. */
2536 switch (ipo->ipo_src.sa.sa_family) {
2537 case 0:
2538 break;
2539 case AF_INET:
2540 i += PADUP(sizeof(struct sockaddr_in));
2541 i += sizeof(struct sadb_address);
2542 break;
2543 #ifdef INET6
2544 case AF_INET6:
2545 i += PADUP(sizeof(struct sockaddr_in6));
2546 i += sizeof(struct sadb_address);
2547 break;
2548 #endif /* INET6 */
2549 default:
2550 return (EINVAL);
2551 }
2552
2553 /* Remote address, might be zeroed. XXX ??? */
2554 switch (ipo->ipo_dst.sa.sa_family) {
2555 case 0:
2556 break;
2557 case AF_INET:
2558 i += PADUP(sizeof(struct sockaddr_in));
2559 i += sizeof(struct sadb_address);
2560 break;
2561 #ifdef INET6
2562 case AF_INET6:
2563 i += PADUP(sizeof(struct sockaddr_in6));
2564 i += sizeof(struct sadb_address);
2565 break;
2566 #endif /* INET6 */
2567 default:
2568 return (EINVAL);
2569 }
2570
2571 if (ipo->ipo_ids) {
2572 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_local->len);
2573 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_remote->len);
2574 }
2575
2576 if (lenp)
2577 *lenp = i;
2578
2579 if (buffer == NULL) {
2580 rval = 0;
2581 goto ret;
2582 }
2583
2584 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) {
2585 rval = ENOMEM;
2586 goto ret;
2587 } else
2588 *buffer = p;
2589
2590 /* Local address. */
2591 if (ipo->ipo_src.sa.sa_family) {
2592 headers[SADB_EXT_ADDRESS_SRC] = p;
2593 export_address(&p, &ipo->ipo_src.sa);
2594 }
2595
2596 /* Remote address. */
2597 if (ipo->ipo_dst.sa.sa_family) {
2598 headers[SADB_EXT_ADDRESS_DST] = p;
2599 export_address(&p, &ipo->ipo_dst.sa);
2600 }
2601
2602 /* Get actual flow. */
2603 export_flow(&p, ipo->ipo_type, &ipo->ipo_addr, &ipo->ipo_mask,
2604 headers);
2605
2606 /* Add ids only when we are root. */
2607 perm = suser(curproc);
2608 if (perm == 0 && ipo->ipo_ids)
2609 export_identities(&p, ipo->ipo_ids, 0, headers);
2610
2611 rval = 0;
2612 ret:
2613 return (rval);
2614 }
2615
2616 int
pfkeyv2_sysctl_policydumper(struct ipsec_policy * ipo,void * arg,unsigned int tableid)2617 pfkeyv2_sysctl_policydumper(struct ipsec_policy *ipo, void *arg,
2618 unsigned int tableid)
2619 {
2620 struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg;
2621 void *buffer = NULL;
2622 int i, buflen, error = 0;
2623
2624 if (w->w_where) {
2625 void *headers[SADB_EXT_MAX + 1];
2626 struct sadb_msg msg;
2627
2628 bzero(headers, sizeof(headers));
2629 if ((error = pfkeyv2_dump_policy(ipo, headers, &buffer,
2630 &buflen)) != 0)
2631 goto done;
2632 if (w->w_len < buflen) {
2633 error = ENOMEM;
2634 goto done;
2635 }
2636 /* prepend header */
2637 bzero(&msg, sizeof(msg));
2638 msg.sadb_msg_version = PF_KEY_V2;
2639 if (ipo->ipo_sproto == IPPROTO_ESP)
2640 msg.sadb_msg_satype = SADB_SATYPE_ESP;
2641 else if (ipo->ipo_sproto == IPPROTO_AH)
2642 msg.sadb_msg_satype = SADB_SATYPE_AH;
2643 else if (ipo->ipo_sproto == IPPROTO_IPCOMP)
2644 msg.sadb_msg_satype = SADB_X_SATYPE_IPCOMP;
2645 else if (ipo->ipo_sproto == IPPROTO_IPIP)
2646 msg.sadb_msg_satype = SADB_X_SATYPE_IPIP;
2647 msg.sadb_msg_type = SADB_X_SPDDUMP;
2648 msg.sadb_msg_len = (sizeof(msg) + buflen) / sizeof(uint64_t);
2649 if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0)
2650 goto done;
2651 w->w_where += sizeof(msg);
2652 w->w_len -= sizeof(msg);
2653 /* set extension type */
2654 for (i = 1; i <= SADB_EXT_MAX; i++)
2655 if (headers[i])
2656 ((struct sadb_ext *)
2657 headers[i])->sadb_ext_type = i;
2658 if ((error = copyout(buffer, w->w_where, buflen)) != 0)
2659 goto done;
2660 w->w_where += buflen;
2661 w->w_len -= buflen;
2662 } else {
2663 if ((error = pfkeyv2_dump_policy(ipo, NULL, NULL,
2664 &buflen)) != 0)
2665 goto done;
2666 w->w_len += buflen;
2667 w->w_len += sizeof(struct sadb_msg);
2668 }
2669
2670 done:
2671 if (buffer)
2672 free(buffer, M_PFKEY, buflen);
2673 return (error);
2674 }
2675
2676 int
pfkeyv2_policy_flush(struct ipsec_policy * ipo,void * arg,unsigned int tableid)2677 pfkeyv2_policy_flush(struct ipsec_policy *ipo, void *arg, unsigned int tableid)
2678 {
2679 int error;
2680
2681 error = ipsec_delete_policy(ipo);
2682 if (error == 0)
2683 error = EAGAIN;
2684
2685 return (error);
2686 }
2687
2688 int
pfkeyv2_sysctl(int * name,u_int namelen,void * oldp,size_t * oldlenp,void * new,size_t newlen)2689 pfkeyv2_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp,
2690 void *new, size_t newlen)
2691 {
2692 struct pfkeyv2_sysctl_walk w;
2693 int error = EINVAL;
2694 u_int rdomain;
2695 u_int tableid;
2696
2697 if (new)
2698 return (EPERM);
2699 if (namelen < 1)
2700 return (EINVAL);
2701 w.w_op = name[0];
2702 if (namelen >= 2)
2703 w.w_satype = name[1];
2704 else
2705 w.w_satype = SADB_SATYPE_UNSPEC;
2706 w.w_where = oldp;
2707 w.w_len = oldp ? *oldlenp : 0;
2708
2709 if (namelen == 3) {
2710 tableid = name[2];
2711 if (!rtable_exists(tableid))
2712 return (ENOENT);
2713 } else
2714 tableid = curproc->p_p->ps_rtableid;
2715 rdomain = rtable_l2(tableid);
2716
2717 switch(w.w_op) {
2718 case NET_KEY_SADB_DUMP:
2719 if ((error = suser(curproc)) != 0)
2720 return (error);
2721 NET_LOCK();
2722 error = tdb_walk(rdomain, pfkeyv2_sysctl_walker, &w);
2723 NET_UNLOCK();
2724 if (oldp)
2725 *oldlenp = w.w_where - oldp;
2726 else
2727 *oldlenp = w.w_len;
2728 break;
2729
2730 case NET_KEY_SPD_DUMP:
2731 NET_LOCK_SHARED();
2732 error = spd_table_walk(rdomain,
2733 pfkeyv2_sysctl_policydumper, &w);
2734 NET_UNLOCK_SHARED();
2735 if (oldp)
2736 *oldlenp = w.w_where - oldp;
2737 else
2738 *oldlenp = w.w_len;
2739 break;
2740 }
2741
2742 return (error);
2743 }
2744