1 /* $OpenBSD: pfkeyv2.c,v 1.260 2024/01/11 14:15:11 bluhm 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 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 235 keycb_ref(void *null, void *v) 236 { 237 struct pkpcb *kp = v; 238 239 refcnt_take(&kp->kcb_refcnt); 240 } 241 242 void 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 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 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 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 345 pfkeyv2_disconnect(struct socket *so) 346 { 347 soisdisconnected(so); 348 return (0); 349 } 350 351 int 352 pfkeyv2_shutdown(struct socket *so) 353 { 354 socantsendmore(so); 355 return (0); 356 } 357 358 int 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 387 pfkeyv2_sockaddr(struct socket *so, struct mbuf *nam) 388 { 389 return (EINVAL); 390 } 391 392 int 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 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 442 pfkey_sendup(struct pkpcb *kp, struct mbuf *m0, int more) 443 { 444 struct socket *so = kp->kcb_socket; 445 struct mbuf *m; 446 447 soassertlocked(so); 448 449 if (more) { 450 if (!(m = m_dup_pkt(m0, 0, M_DONTWAIT))) 451 return (ENOMEM); 452 } else 453 m = m0; 454 455 if (!sbappendaddr(so, &so->so_rcv, &pfkey_addr, m, NULL)) { 456 m_freem(m); 457 return (ENOBUFS); 458 } 459 460 sorwakeup(so); 461 return (0); 462 } 463 464 /* 465 * Send a PFKEYv2 message, possibly to many receivers, based on the 466 * satype of the socket (which is set by the REGISTER message), and the 467 * third argument. 468 */ 469 int 470 pfkeyv2_sendmessage(void **headers, int mode, struct socket *so, 471 u_int8_t satype, int count, u_int rdomain) 472 { 473 int i, j, rval; 474 void *p, *buffer = NULL; 475 struct mbuf *packet; 476 struct pkpcb *kp; 477 struct sadb_msg *smsg; 478 struct srp_ref sr; 479 480 /* Find out how much space we'll need... */ 481 j = sizeof(struct sadb_msg); 482 483 for (i = 1; i <= SADB_EXT_MAX; i++) 484 if (headers[i]) 485 j += ((struct sadb_ext *)headers[i])->sadb_ext_len * 486 sizeof(uint64_t); 487 488 /* ...and allocate it */ 489 if (!(buffer = malloc(j + sizeof(struct sadb_msg), M_PFKEY, 490 M_NOWAIT))) { 491 rval = ENOMEM; 492 goto ret; 493 } 494 495 p = buffer + sizeof(struct sadb_msg); 496 bcopy(headers[0], p, sizeof(struct sadb_msg)); 497 ((struct sadb_msg *) p)->sadb_msg_len = j / sizeof(uint64_t); 498 p += sizeof(struct sadb_msg); 499 500 /* Copy payloads in the packet */ 501 for (i = 1; i <= SADB_EXT_MAX; i++) 502 if (headers[i]) { 503 ((struct sadb_ext *) headers[i])->sadb_ext_type = i; 504 bcopy(headers[i], p, EXTLEN(headers[i])); 505 p += EXTLEN(headers[i]); 506 } 507 508 if ((rval = pfdatatopacket(buffer + sizeof(struct sadb_msg), 509 j, &packet)) != 0) 510 goto ret; 511 512 switch (mode) { 513 case PFKEYV2_SENDMESSAGE_UNICAST: 514 /* 515 * Send message to the specified socket, plus all 516 * promiscuous listeners. 517 */ 518 solock(so); 519 pfkey_sendup(sotokeycb(so), packet, 0); 520 sounlock(so); 521 522 /* 523 * Promiscuous messages contain the original message 524 * encapsulated in another sadb_msg header. 525 */ 526 bzero(buffer, sizeof(struct sadb_msg)); 527 smsg = (struct sadb_msg *) buffer; 528 smsg->sadb_msg_version = PF_KEY_V2; 529 smsg->sadb_msg_type = SADB_X_PROMISC; 530 smsg->sadb_msg_len = (sizeof(struct sadb_msg) + j) / 531 sizeof(uint64_t); 532 smsg->sadb_msg_seq = 0; 533 534 /* Copy to mbuf chain */ 535 if ((rval = pfdatatopacket(buffer, sizeof(struct sadb_msg) + j, 536 &packet)) != 0) 537 goto ret; 538 539 /* 540 * Search for promiscuous listeners, skipping the 541 * original destination. 542 */ 543 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) { 544 if (kp->kcb_socket == so || kp->kcb_rdomain != rdomain) 545 continue; 546 547 keylock(kp); 548 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC) 549 pfkey_sendup(kp, packet, 1); 550 keyunlock(kp); 551 } 552 SRPL_LEAVE(&sr); 553 m_freem(packet); 554 break; 555 556 case PFKEYV2_SENDMESSAGE_REGISTERED: 557 /* 558 * Send the message to all registered sockets that match 559 * the specified satype (e.g., all IPSEC-ESP negotiators) 560 */ 561 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) { 562 if (kp->kcb_rdomain != rdomain) 563 continue; 564 565 keylock(kp); 566 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED) { 567 if (!satype) { 568 /* Just send to everyone registered */ 569 pfkey_sendup(kp, packet, 1); 570 } else { 571 /* Check for specified satype */ 572 if ((1 << satype) & kp->kcb_reg) 573 pfkey_sendup(kp, packet, 1); 574 } 575 } 576 keyunlock(kp); 577 } 578 SRPL_LEAVE(&sr); 579 /* Free last/original copy of the packet */ 580 m_freem(packet); 581 582 /* Encapsulate the original message "inside" an sadb_msg header */ 583 bzero(buffer, sizeof(struct sadb_msg)); 584 smsg = (struct sadb_msg *) buffer; 585 smsg->sadb_msg_version = PF_KEY_V2; 586 smsg->sadb_msg_type = SADB_X_PROMISC; 587 smsg->sadb_msg_len = (sizeof(struct sadb_msg) + j) / 588 sizeof(uint64_t); 589 smsg->sadb_msg_seq = 0; 590 591 /* Convert to mbuf chain */ 592 if ((rval = pfdatatopacket(buffer, sizeof(struct sadb_msg) + j, 593 &packet)) != 0) 594 goto ret; 595 596 /* Send to all registered promiscuous listeners */ 597 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) { 598 if (kp->kcb_rdomain != rdomain) 599 continue; 600 601 keylock(kp); 602 if ((kp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC) && 603 !(kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED)) 604 pfkey_sendup(kp, packet, 1); 605 keyunlock(kp); 606 } 607 SRPL_LEAVE(&sr); 608 m_freem(packet); 609 break; 610 611 case PFKEYV2_SENDMESSAGE_BROADCAST: 612 /* Send message to all sockets */ 613 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) { 614 if (kp->kcb_rdomain != rdomain) 615 continue; 616 617 keylock(kp); 618 pfkey_sendup(kp, packet, 1); 619 keyunlock(kp); 620 } 621 SRPL_LEAVE(&sr); 622 m_freem(packet); 623 break; 624 } 625 626 ret: 627 if (buffer != NULL) { 628 explicit_bzero(buffer, j + sizeof(struct sadb_msg)); 629 free(buffer, M_PFKEY, j + sizeof(struct sadb_msg)); 630 } 631 632 return (rval); 633 } 634 635 /* 636 * Get SPD information for an ACQUIRE. We setup the message such that 637 * the SRC/DST payloads are relative to us (regardless of whether the 638 * SPD rule was for incoming or outgoing packets). 639 */ 640 int 641 pfkeyv2_policy(struct ipsec_acquire *ipa, void **headers, void **buffer, 642 int *bufferlen) 643 { 644 union sockaddr_union sunion; 645 struct sadb_protocol *sp; 646 int rval, i, dir; 647 void *p; 648 649 /* Find out how big a buffer we need */ 650 i = 4 * sizeof(struct sadb_address) + sizeof(struct sadb_protocol); 651 bzero(&sunion, sizeof(union sockaddr_union)); 652 653 switch (ipa->ipa_info.sen_type) { 654 case SENT_IP4: 655 i += 4 * PADUP(sizeof(struct sockaddr_in)); 656 sunion.sa.sa_family = AF_INET; 657 sunion.sa.sa_len = sizeof(struct sockaddr_in); 658 dir = ipa->ipa_info.sen_direction; 659 break; 660 661 #ifdef INET6 662 case SENT_IP6: 663 i += 4 * PADUP(sizeof(struct sockaddr_in6)); 664 sunion.sa.sa_family = AF_INET6; 665 sunion.sa.sa_len = sizeof(struct sockaddr_in6); 666 dir = ipa->ipa_info.sen_ip6_direction; 667 break; 668 #endif /* INET6 */ 669 670 default: 671 return (EINVAL); 672 } 673 674 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 675 rval = ENOMEM; 676 goto ret; 677 } else { 678 *buffer = p; 679 *bufferlen = i; 680 } 681 682 if (dir == IPSP_DIRECTION_OUT) 683 headers[SADB_X_EXT_SRC_FLOW] = p; 684 else 685 headers[SADB_X_EXT_DST_FLOW] = p; 686 switch (sunion.sa.sa_family) { 687 case AF_INET: 688 sunion.sin.sin_addr = ipa->ipa_info.sen_ip_src; 689 sunion.sin.sin_port = ipa->ipa_info.sen_sport; 690 break; 691 692 #ifdef INET6 693 case AF_INET6: 694 sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_src; 695 sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_sport; 696 break; 697 #endif /* INET6 */ 698 } 699 export_address(&p, &sunion.sa); 700 701 if (dir == IPSP_DIRECTION_OUT) 702 headers[SADB_X_EXT_SRC_MASK] = p; 703 else 704 headers[SADB_X_EXT_DST_MASK] = p; 705 switch (sunion.sa.sa_family) { 706 case AF_INET: 707 sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_src; 708 sunion.sin.sin_port = ipa->ipa_mask.sen_sport; 709 break; 710 711 #ifdef INET6 712 case AF_INET6: 713 sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_src; 714 sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_sport; 715 break; 716 #endif /* INET6 */ 717 } 718 export_address(&p, &sunion.sa); 719 720 if (dir == IPSP_DIRECTION_OUT) 721 headers[SADB_X_EXT_DST_FLOW] = p; 722 else 723 headers[SADB_X_EXT_SRC_FLOW] = p; 724 switch (sunion.sa.sa_family) { 725 case AF_INET: 726 sunion.sin.sin_addr = ipa->ipa_info.sen_ip_dst; 727 sunion.sin.sin_port = ipa->ipa_info.sen_dport; 728 break; 729 730 #ifdef INET6 731 case AF_INET6: 732 sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_dst; 733 sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_dport; 734 break; 735 #endif /* INET6 */ 736 } 737 export_address(&p, &sunion.sa); 738 739 if (dir == IPSP_DIRECTION_OUT) 740 headers[SADB_X_EXT_DST_MASK] = p; 741 else 742 headers[SADB_X_EXT_SRC_MASK] = p; 743 switch (sunion.sa.sa_family) { 744 case AF_INET: 745 sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_dst; 746 sunion.sin.sin_port = ipa->ipa_mask.sen_dport; 747 break; 748 749 #ifdef INET6 750 case AF_INET6: 751 sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_dst; 752 sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_dport; 753 break; 754 #endif /* INET6 */ 755 } 756 export_address(&p, &sunion.sa); 757 758 headers[SADB_X_EXT_FLOW_TYPE] = p; 759 sp = p; 760 sp->sadb_protocol_len = sizeof(struct sadb_protocol) / 761 sizeof(u_int64_t); 762 switch (sunion.sa.sa_family) { 763 case AF_INET: 764 if (ipa->ipa_mask.sen_proto) 765 sp->sadb_protocol_proto = ipa->ipa_info.sen_proto; 766 sp->sadb_protocol_direction = ipa->ipa_info.sen_direction; 767 break; 768 769 #ifdef INET6 770 case AF_INET6: 771 if (ipa->ipa_mask.sen_ip6_proto) 772 sp->sadb_protocol_proto = ipa->ipa_info.sen_ip6_proto; 773 sp->sadb_protocol_direction = ipa->ipa_info.sen_ip6_direction; 774 break; 775 #endif /* INET6 */ 776 } 777 778 rval = 0; 779 780 ret: 781 return (rval); 782 } 783 784 /* 785 * Get all the information contained in an SA to a PFKEYV2 message. 786 */ 787 int 788 pfkeyv2_get(struct tdb *tdb, void **headers, void **buffer, int *lenp, 789 int *lenused) 790 { 791 int rval, i; 792 void *p; 793 794 NET_ASSERT_LOCKED(); 795 796 /* Find how much space we need */ 797 i = sizeof(struct sadb_sa) + sizeof(struct sadb_lifetime) + 798 sizeof(struct sadb_x_counter); 799 800 if (tdb->tdb_soft_allocations || tdb->tdb_soft_bytes || 801 tdb->tdb_soft_timeout || tdb->tdb_soft_first_use) 802 i += sizeof(struct sadb_lifetime); 803 804 if (tdb->tdb_exp_allocations || tdb->tdb_exp_bytes || 805 tdb->tdb_exp_timeout || tdb->tdb_exp_first_use) 806 i += sizeof(struct sadb_lifetime); 807 808 if (tdb->tdb_last_used) 809 i += sizeof(struct sadb_lifetime); 810 811 i += sizeof(struct sadb_address) + PADUP(tdb->tdb_src.sa.sa_len); 812 i += sizeof(struct sadb_address) + PADUP(tdb->tdb_dst.sa.sa_len); 813 814 if (tdb->tdb_ids) { 815 i += sizeof(struct sadb_ident) + PADUP(tdb->tdb_ids->id_local->len); 816 i += sizeof(struct sadb_ident) + PADUP(tdb->tdb_ids->id_remote->len); 817 } 818 819 if (tdb->tdb_amxkey) 820 i += sizeof(struct sadb_key) + PADUP(tdb->tdb_amxkeylen); 821 822 if (tdb->tdb_emxkey) 823 i += sizeof(struct sadb_key) + PADUP(tdb->tdb_emxkeylen); 824 825 if (tdb->tdb_filter.sen_type) { 826 i += 2 * sizeof(struct sadb_protocol); 827 828 /* We'll need four of them: src, src mask, dst, dst mask. */ 829 switch (tdb->tdb_filter.sen_type) { 830 case SENT_IP4: 831 i += 4 * PADUP(sizeof(struct sockaddr_in)); 832 i += 4 * sizeof(struct sadb_address); 833 break; 834 #ifdef INET6 835 case SENT_IP6: 836 i += 4 * PADUP(sizeof(struct sockaddr_in6)); 837 i += 4 * sizeof(struct sadb_address); 838 break; 839 #endif /* INET6 */ 840 default: 841 rval = EINVAL; 842 goto ret; 843 } 844 } 845 846 if (tdb->tdb_onext) { 847 i += sizeof(struct sadb_sa); 848 i += sizeof(struct sadb_address) + 849 PADUP(tdb->tdb_onext->tdb_dst.sa.sa_len); 850 i += sizeof(struct sadb_protocol); 851 } 852 853 if (tdb->tdb_udpencap_port) 854 i += sizeof(struct sadb_x_udpencap); 855 856 i += sizeof(struct sadb_x_replay); 857 858 if (tdb->tdb_mtu > 0) 859 i+= sizeof(struct sadb_x_mtu); 860 861 if (tdb->tdb_rdomain != tdb->tdb_rdomain_post) 862 i += sizeof(struct sadb_x_rdomain); 863 864 #if NPF > 0 865 if (tdb->tdb_tag) 866 i += sizeof(struct sadb_x_tag) + PADUP(PF_TAG_NAME_SIZE); 867 if (tdb->tdb_tap) 868 i += sizeof(struct sadb_x_tap); 869 #endif 870 871 if (ISSET(tdb->tdb_flags, TDBF_IFACE)) 872 i += sizeof(struct sadb_x_iface); 873 874 if (lenp) 875 *lenp = i; 876 877 if (buffer == NULL) { 878 rval = 0; 879 goto ret; 880 } 881 882 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 883 rval = ENOMEM; 884 goto ret; 885 } else 886 *buffer = p; 887 888 headers[SADB_EXT_SA] = p; 889 890 export_sa(&p, tdb); /* Export SA information (mostly flags) */ 891 892 /* Export lifetimes where applicable */ 893 headers[SADB_EXT_LIFETIME_CURRENT] = p; 894 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_CURRENT); 895 896 if (tdb->tdb_soft_allocations || tdb->tdb_soft_bytes || 897 tdb->tdb_soft_first_use || tdb->tdb_soft_timeout) { 898 headers[SADB_EXT_LIFETIME_SOFT] = p; 899 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_SOFT); 900 } 901 902 if (tdb->tdb_exp_allocations || tdb->tdb_exp_bytes || 903 tdb->tdb_exp_first_use || tdb->tdb_exp_timeout) { 904 headers[SADB_EXT_LIFETIME_HARD] = p; 905 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_HARD); 906 } 907 908 if (tdb->tdb_last_used) { 909 headers[SADB_X_EXT_LIFETIME_LASTUSE] = p; 910 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_LASTUSE); 911 } 912 913 /* Export TDB source address */ 914 headers[SADB_EXT_ADDRESS_SRC] = p; 915 export_address(&p, &tdb->tdb_src.sa); 916 917 /* Export TDB destination address */ 918 headers[SADB_EXT_ADDRESS_DST] = p; 919 export_address(&p, &tdb->tdb_dst.sa); 920 921 /* Export source/destination identities, if present */ 922 if (tdb->tdb_ids) 923 export_identities(&p, tdb->tdb_ids, tdb->tdb_ids_swapped, headers); 924 925 /* Export authentication key, if present */ 926 if (tdb->tdb_amxkey) { 927 headers[SADB_EXT_KEY_AUTH] = p; 928 export_key(&p, tdb, PFKEYV2_AUTHENTICATION_KEY); 929 } 930 931 /* Export encryption key, if present */ 932 if (tdb->tdb_emxkey) { 933 headers[SADB_EXT_KEY_ENCRYPT] = p; 934 export_key(&p, tdb, PFKEYV2_ENCRYPTION_KEY); 935 } 936 937 /* Export flow/filter, if present */ 938 if (tdb->tdb_filter.sen_type) 939 export_flow(&p, IPSP_IPSEC_USE, &tdb->tdb_filter, 940 &tdb->tdb_filtermask, headers); 941 942 if (tdb->tdb_onext) { 943 headers[SADB_X_EXT_SA2] = p; 944 export_sa(&p, tdb->tdb_onext); 945 headers[SADB_X_EXT_DST2] = p; 946 export_address(&p, &tdb->tdb_onext->tdb_dst.sa); 947 headers[SADB_X_EXT_SATYPE2] = p; 948 export_satype(&p, tdb->tdb_onext); 949 } 950 951 /* Export UDP encapsulation port, if present */ 952 if (tdb->tdb_udpencap_port) { 953 headers[SADB_X_EXT_UDPENCAP] = p; 954 export_udpencap(&p, tdb); 955 } 956 957 headers[SADB_X_EXT_REPLAY] = p; 958 export_replay(&p, tdb); 959 960 if (tdb->tdb_mtu > 0) { 961 headers[SADB_X_EXT_MTU] = p; 962 export_mtu(&p, tdb); 963 } 964 965 /* Export rdomain switch, if present */ 966 if (tdb->tdb_rdomain != tdb->tdb_rdomain_post) { 967 headers[SADB_X_EXT_RDOMAIN] = p; 968 export_rdomain(&p, tdb); 969 } 970 971 #if NPF > 0 972 /* Export tag information, if present */ 973 if (tdb->tdb_tag) { 974 headers[SADB_X_EXT_TAG] = p; 975 export_tag(&p, tdb); 976 } 977 978 /* Export tap enc(4) device information, if present */ 979 if (tdb->tdb_tap) { 980 headers[SADB_X_EXT_TAP] = p; 981 export_tap(&p, tdb); 982 } 983 #endif 984 985 /* Export sec(4) interface information, if present */ 986 if (ISSET(tdb->tdb_flags, TDBF_IFACE)) { 987 headers[SADB_X_EXT_IFACE] = p; 988 export_iface(&p, tdb); 989 } 990 991 headers[SADB_X_EXT_COUNTER] = p; 992 export_counter(&p, tdb); 993 994 if (lenused) 995 *lenused = p - *buffer; 996 rval = 0; 997 998 ret: 999 return (rval); 1000 } 1001 1002 /* 1003 * Dump a TDB. 1004 */ 1005 int 1006 pfkeyv2_dump_walker(struct tdb *tdb, void *state, int last) 1007 { 1008 struct dump_state *dump_state = (struct dump_state *) state; 1009 void *headers[SADB_EXT_MAX+1], *buffer; 1010 int buflen; 1011 int rval; 1012 1013 /* If not satype was specified, dump all TDBs */ 1014 if (!dump_state->sadb_msg->sadb_msg_satype || 1015 (tdb->tdb_satype == dump_state->sadb_msg->sadb_msg_satype)) { 1016 bzero(headers, sizeof(headers)); 1017 headers[0] = (void *) dump_state->sadb_msg; 1018 1019 /* Get the information from the TDB to a PFKEYv2 message */ 1020 if ((rval = pfkeyv2_get(tdb, headers, &buffer, &buflen, NULL)) != 0) 1021 return (rval); 1022 1023 if (last) 1024 ((struct sadb_msg *)headers[0])->sadb_msg_seq = 0; 1025 1026 /* Send the message to the specified socket */ 1027 rval = pfkeyv2_sendmessage(headers, 1028 PFKEYV2_SENDMESSAGE_UNICAST, dump_state->socket, 0, 0, 1029 tdb->tdb_rdomain); 1030 1031 explicit_bzero(buffer, buflen); 1032 free(buffer, M_PFKEY, buflen); 1033 if (rval) 1034 return (rval); 1035 } 1036 1037 return (0); 1038 } 1039 1040 /* 1041 * Delete an SA. 1042 */ 1043 int 1044 pfkeyv2_sa_flush(struct tdb *tdb, void *satype_vp, int last) 1045 { 1046 if (!(*((u_int8_t *) satype_vp)) || 1047 tdb->tdb_satype == *((u_int8_t *) satype_vp)) 1048 tdb_delete(tdb); 1049 return (0); 1050 } 1051 1052 /* 1053 * Convert between SATYPEs and IPsec protocols, taking into consideration 1054 * sysctl variables enabling/disabling ESP/AH and the presence of the old 1055 * IPsec transforms. 1056 */ 1057 int 1058 pfkeyv2_get_proto_alg(u_int8_t satype, u_int8_t *sproto, int *alg) 1059 { 1060 switch (satype) { 1061 #ifdef IPSEC 1062 case SADB_SATYPE_AH: 1063 if (!ah_enable) 1064 return (EOPNOTSUPP); 1065 1066 *sproto = IPPROTO_AH; 1067 1068 if(alg != NULL) 1069 *alg = satype = XF_AH; 1070 1071 break; 1072 1073 case SADB_SATYPE_ESP: 1074 if (!esp_enable) 1075 return (EOPNOTSUPP); 1076 1077 *sproto = IPPROTO_ESP; 1078 1079 if(alg != NULL) 1080 *alg = satype = XF_ESP; 1081 1082 break; 1083 1084 case SADB_X_SATYPE_IPIP: 1085 *sproto = IPPROTO_IPIP; 1086 1087 if (alg != NULL) 1088 *alg = XF_IP4; 1089 1090 break; 1091 1092 case SADB_X_SATYPE_IPCOMP: 1093 if (!ipcomp_enable) 1094 return (EOPNOTSUPP); 1095 1096 *sproto = IPPROTO_IPCOMP; 1097 1098 if(alg != NULL) 1099 *alg = satype = XF_IPCOMP; 1100 1101 break; 1102 #endif /* IPSEC */ 1103 #ifdef TCP_SIGNATURE 1104 case SADB_X_SATYPE_TCPSIGNATURE: 1105 *sproto = IPPROTO_TCP; 1106 1107 if (alg != NULL) 1108 *alg = XF_TCPSIGNATURE; 1109 1110 break; 1111 #endif /* TCP_SIGNATURE */ 1112 1113 default: /* Nothing else supported */ 1114 return (EOPNOTSUPP); 1115 } 1116 1117 return (0); 1118 } 1119 1120 /* 1121 * Handle all messages from userland to kernel. 1122 */ 1123 int 1124 pfkeyv2_dosend(struct socket *so, void *message, int len) 1125 { 1126 int i, j, rval = 0, mode = PFKEYV2_SENDMESSAGE_BROADCAST; 1127 int delflag = 0; 1128 struct sockaddr_encap encapdst, encapnetmask; 1129 struct ipsec_policy *ipo; 1130 struct ipsec_acquire *ipa; 1131 struct radix_node_head *rnh; 1132 struct radix_node *rn = NULL; 1133 struct pkpcb *kp, *bkp; 1134 void *freeme = NULL, *freeme2 = NULL, *freeme3 = NULL; 1135 int freeme_sz = 0, freeme2_sz = 0, freeme3_sz = 0; 1136 void *bckptr = NULL; 1137 void *headers[SADB_EXT_MAX + 1]; 1138 union sockaddr_union *sunionp; 1139 struct tdb *sa1 = NULL, *sa2 = NULL; 1140 struct sadb_msg *smsg; 1141 struct sadb_spirange *sprng; 1142 struct sadb_sa *ssa; 1143 struct sadb_supported *ssup; 1144 struct sadb_ident *sid, *did; 1145 struct srp_ref sr; 1146 struct sadb_x_rdomain *srdomain; 1147 u_int rdomain = 0; 1148 int promisc; 1149 1150 mtx_enter(&pfkeyv2_mtx); 1151 promisc = npromisc; 1152 mtx_leave(&pfkeyv2_mtx); 1153 1154 /* Verify that we received this over a legitimate pfkeyv2 socket */ 1155 bzero(headers, sizeof(headers)); 1156 1157 kp = sotokeycb(so); 1158 if (!kp) { 1159 rval = EINVAL; 1160 goto ret; 1161 } 1162 1163 rdomain = kp->kcb_rdomain; 1164 1165 /* Validate message format */ 1166 if ((rval = pfkeyv2_parsemessage(message, len, headers)) != 0) 1167 goto ret; 1168 1169 /* If we have any promiscuous listeners, send them a copy of the message */ 1170 if (promisc) { 1171 struct mbuf *packet; 1172 1173 freeme_sz = sizeof(struct sadb_msg) + len; 1174 if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT))) { 1175 rval = ENOMEM; 1176 goto ret; 1177 } 1178 1179 /* Initialize encapsulating header */ 1180 bzero(freeme, sizeof(struct sadb_msg)); 1181 smsg = (struct sadb_msg *) freeme; 1182 smsg->sadb_msg_version = PF_KEY_V2; 1183 smsg->sadb_msg_type = SADB_X_PROMISC; 1184 smsg->sadb_msg_len = (sizeof(struct sadb_msg) + len) / 1185 sizeof(uint64_t); 1186 smsg->sadb_msg_seq = curproc->p_p->ps_pid; 1187 1188 bcopy(message, freeme + sizeof(struct sadb_msg), len); 1189 1190 /* Convert to mbuf chain */ 1191 if ((rval = pfdatatopacket(freeme, freeme_sz, &packet)) != 0) 1192 goto ret; 1193 1194 /* Send to all promiscuous listeners */ 1195 SRPL_FOREACH(bkp, &sr, &pkptable.pkp_list, kcb_list) { 1196 if (bkp->kcb_rdomain != kp->kcb_rdomain) 1197 continue; 1198 1199 keylock(bkp); 1200 if (bkp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC) 1201 pfkey_sendup(bkp, packet, 1); 1202 keyunlock(bkp); 1203 } 1204 SRPL_LEAVE(&sr); 1205 1206 m_freem(packet); 1207 1208 /* Paranoid */ 1209 explicit_bzero(freeme, freeme_sz); 1210 free(freeme, M_PFKEY, freeme_sz); 1211 freeme = NULL; 1212 freeme_sz = 0; 1213 } 1214 1215 /* use specified rdomain */ 1216 srdomain = (struct sadb_x_rdomain *) headers[SADB_X_EXT_RDOMAIN]; 1217 if (srdomain) { 1218 if (!rtable_exists(srdomain->sadb_x_rdomain_dom1) || 1219 !rtable_exists(srdomain->sadb_x_rdomain_dom2)) { 1220 rval = EINVAL; 1221 goto ret; 1222 } 1223 rdomain = srdomain->sadb_x_rdomain_dom1; 1224 } 1225 1226 smsg = (struct sadb_msg *) headers[0]; 1227 switch (smsg->sadb_msg_type) { 1228 case SADB_GETSPI: /* Reserve an SPI */ 1229 sa1 = malloc(sizeof (*sa1), M_PFKEY, M_NOWAIT | M_ZERO); 1230 if (sa1 == NULL) { 1231 rval = ENOMEM; 1232 goto ret; 1233 } 1234 1235 sa1->tdb_satype = smsg->sadb_msg_satype; 1236 if ((rval = pfkeyv2_get_proto_alg(sa1->tdb_satype, 1237 &sa1->tdb_sproto, 0))) 1238 goto ret; 1239 1240 import_address(&sa1->tdb_src.sa, headers[SADB_EXT_ADDRESS_SRC]); 1241 import_address(&sa1->tdb_dst.sa, headers[SADB_EXT_ADDRESS_DST]); 1242 1243 /* Find an unused SA identifier */ 1244 sprng = (struct sadb_spirange *) headers[SADB_EXT_SPIRANGE]; 1245 NET_LOCK(); 1246 sa1->tdb_spi = reserve_spi(rdomain, 1247 sprng->sadb_spirange_min, sprng->sadb_spirange_max, 1248 &sa1->tdb_src, &sa1->tdb_dst, sa1->tdb_sproto, &rval); 1249 if (sa1->tdb_spi == 0) { 1250 NET_UNLOCK(); 1251 goto ret; 1252 } 1253 1254 /* Send a message back telling what the SA (the SPI really) is */ 1255 freeme_sz = sizeof(struct sadb_sa); 1256 if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT | M_ZERO))) { 1257 rval = ENOMEM; 1258 NET_UNLOCK(); 1259 goto ret; 1260 } 1261 1262 headers[SADB_EXT_SPIRANGE] = NULL; 1263 headers[SADB_EXT_SA] = freeme; 1264 bckptr = freeme; 1265 1266 /* We really only care about the SPI, but we'll export the SA */ 1267 export_sa((void **) &bckptr, sa1); 1268 NET_UNLOCK(); 1269 break; 1270 1271 case SADB_UPDATE: 1272 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1273 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] + 1274 sizeof(struct sadb_address)); 1275 1276 /* Either all or none of the flow must be included */ 1277 if ((headers[SADB_X_EXT_SRC_FLOW] || 1278 headers[SADB_X_EXT_PROTOCOL] || 1279 headers[SADB_X_EXT_FLOW_TYPE] || 1280 headers[SADB_X_EXT_DST_FLOW] || 1281 headers[SADB_X_EXT_SRC_MASK] || 1282 headers[SADB_X_EXT_DST_MASK]) && 1283 !(headers[SADB_X_EXT_SRC_FLOW] && 1284 headers[SADB_X_EXT_PROTOCOL] && 1285 headers[SADB_X_EXT_FLOW_TYPE] && 1286 headers[SADB_X_EXT_DST_FLOW] && 1287 headers[SADB_X_EXT_SRC_MASK] && 1288 headers[SADB_X_EXT_DST_MASK])) { 1289 rval = EINVAL; 1290 goto ret; 1291 } 1292 #ifdef IPSEC 1293 /* UDP encap has to be enabled and is only supported for ESP */ 1294 if (headers[SADB_X_EXT_UDPENCAP] && 1295 (!udpencap_enable || 1296 smsg->sadb_msg_satype != SADB_SATYPE_ESP)) { 1297 rval = EINVAL; 1298 goto ret; 1299 } 1300 #endif /* IPSEC */ 1301 1302 /* Find TDB */ 1303 NET_LOCK(); 1304 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1305 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1306 1307 /* If there's no such SA, we're done */ 1308 if (sa2 == NULL) { 1309 rval = ESRCH; 1310 NET_UNLOCK(); 1311 goto ret; 1312 } 1313 1314 /* If this is a reserved SA */ 1315 if (sa2->tdb_flags & TDBF_INVALID) { 1316 struct tdb *newsa; 1317 struct ipsecinit ii; 1318 int alg; 1319 1320 /* Create new TDB */ 1321 newsa = tdb_alloc(rdomain); 1322 newsa->tdb_satype = smsg->sadb_msg_satype; 1323 1324 if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype, 1325 &newsa->tdb_sproto, &alg))) { 1326 tdb_unref(newsa); 1327 NET_UNLOCK(); 1328 goto ret; 1329 } 1330 1331 /* Initialize SA */ 1332 bzero(&ii, sizeof(struct ipsecinit)); 1333 import_sa(newsa, headers[SADB_EXT_SA], &ii); 1334 import_address(&newsa->tdb_src.sa, 1335 headers[SADB_EXT_ADDRESS_SRC]); 1336 import_address(&newsa->tdb_dst.sa, 1337 headers[SADB_EXT_ADDRESS_DST]); 1338 import_lifetime(newsa, 1339 headers[SADB_EXT_LIFETIME_CURRENT], 1340 PFKEYV2_LIFETIME_CURRENT); 1341 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT], 1342 PFKEYV2_LIFETIME_SOFT); 1343 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD], 1344 PFKEYV2_LIFETIME_HARD); 1345 import_key(&ii, headers[SADB_EXT_KEY_AUTH], 1346 PFKEYV2_AUTHENTICATION_KEY); 1347 import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT], 1348 PFKEYV2_ENCRYPTION_KEY); 1349 newsa->tdb_ids_swapped = 1; /* only on TDB_UPDATE */ 1350 import_identities(&newsa->tdb_ids, 1351 newsa->tdb_ids_swapped, 1352 headers[SADB_EXT_IDENTITY_SRC], 1353 headers[SADB_EXT_IDENTITY_DST]); 1354 if ((rval = import_flow(&newsa->tdb_filter, 1355 &newsa->tdb_filtermask, 1356 headers[SADB_X_EXT_SRC_FLOW], 1357 headers[SADB_X_EXT_SRC_MASK], 1358 headers[SADB_X_EXT_DST_FLOW], 1359 headers[SADB_X_EXT_DST_MASK], 1360 headers[SADB_X_EXT_PROTOCOL], 1361 headers[SADB_X_EXT_FLOW_TYPE]))) { 1362 tdb_unref(newsa); 1363 NET_UNLOCK(); 1364 goto ret; 1365 } 1366 import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]); 1367 import_rdomain(newsa, headers[SADB_X_EXT_RDOMAIN]); 1368 #if NPF > 0 1369 import_tag(newsa, headers[SADB_X_EXT_TAG]); 1370 import_tap(newsa, headers[SADB_X_EXT_TAP]); 1371 #endif 1372 import_iface(newsa, headers[SADB_X_EXT_IFACE]); 1373 1374 /* Exclude sensitive data from reply message. */ 1375 headers[SADB_EXT_KEY_AUTH] = NULL; 1376 headers[SADB_EXT_KEY_ENCRYPT] = NULL; 1377 headers[SADB_X_EXT_LOCAL_AUTH] = NULL; 1378 headers[SADB_X_EXT_REMOTE_AUTH] = NULL; 1379 1380 newsa->tdb_seq = smsg->sadb_msg_seq; 1381 1382 rval = tdb_init(newsa, alg, &ii); 1383 if (rval) { 1384 rval = EINVAL; 1385 tdb_unref(newsa); 1386 NET_UNLOCK(); 1387 goto ret; 1388 } 1389 1390 newsa->tdb_cur_allocations = sa2->tdb_cur_allocations; 1391 1392 /* Delete old version of the SA, insert new one */ 1393 tdb_delete(sa2); 1394 1395 tdb_addtimeouts(newsa); 1396 1397 puttdb(newsa); 1398 } else { 1399 /* 1400 * The SA is already initialized, so we're only allowed to 1401 * change lifetimes and some other information; we're 1402 * not allowed to change keys, addresses or identities. 1403 */ 1404 if (headers[SADB_EXT_KEY_AUTH] || 1405 headers[SADB_EXT_KEY_ENCRYPT] || 1406 headers[SADB_EXT_IDENTITY_SRC] || 1407 headers[SADB_EXT_IDENTITY_DST] || 1408 headers[SADB_EXT_SENSITIVITY]) { 1409 rval = EINVAL; 1410 NET_UNLOCK(); 1411 goto ret; 1412 } 1413 1414 import_sa(sa2, headers[SADB_EXT_SA], NULL); 1415 import_lifetime(sa2, 1416 headers[SADB_EXT_LIFETIME_CURRENT], 1417 PFKEYV2_LIFETIME_CURRENT); 1418 import_lifetime(sa2, headers[SADB_EXT_LIFETIME_SOFT], 1419 PFKEYV2_LIFETIME_SOFT); 1420 import_lifetime(sa2, headers[SADB_EXT_LIFETIME_HARD], 1421 PFKEYV2_LIFETIME_HARD); 1422 import_udpencap(sa2, headers[SADB_X_EXT_UDPENCAP]); 1423 #if NPF > 0 1424 import_tag(sa2, headers[SADB_X_EXT_TAG]); 1425 import_tap(sa2, headers[SADB_X_EXT_TAP]); 1426 #endif 1427 import_iface(sa2, headers[SADB_X_EXT_IFACE]); 1428 1429 tdb_addtimeouts(sa2); 1430 1431 if (headers[SADB_EXT_ADDRESS_SRC] || 1432 headers[SADB_EXT_ADDRESS_PROXY]) { 1433 mtx_enter(&tdb_sadb_mtx); 1434 tdb_unlink_locked(sa2); 1435 import_address((struct sockaddr *)&sa2->tdb_src, 1436 headers[SADB_EXT_ADDRESS_SRC]); 1437 import_address((struct sockaddr *)&sa2->tdb_dst, 1438 headers[SADB_EXT_ADDRESS_PROXY]); 1439 puttdb_locked(sa2); 1440 mtx_leave(&tdb_sadb_mtx); 1441 } 1442 } 1443 NET_UNLOCK(); 1444 1445 break; 1446 case SADB_ADD: 1447 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1448 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] + 1449 sizeof(struct sadb_address)); 1450 1451 /* Either all or none of the flow must be included */ 1452 if ((headers[SADB_X_EXT_SRC_FLOW] || 1453 headers[SADB_X_EXT_PROTOCOL] || 1454 headers[SADB_X_EXT_FLOW_TYPE] || 1455 headers[SADB_X_EXT_DST_FLOW] || 1456 headers[SADB_X_EXT_SRC_MASK] || 1457 headers[SADB_X_EXT_DST_MASK]) && 1458 !(headers[SADB_X_EXT_SRC_FLOW] && 1459 headers[SADB_X_EXT_PROTOCOL] && 1460 headers[SADB_X_EXT_FLOW_TYPE] && 1461 headers[SADB_X_EXT_DST_FLOW] && 1462 headers[SADB_X_EXT_SRC_MASK] && 1463 headers[SADB_X_EXT_DST_MASK])) { 1464 rval = EINVAL; 1465 goto ret; 1466 } 1467 #ifdef IPSEC 1468 /* UDP encap has to be enabled and is only supported for ESP */ 1469 if (headers[SADB_X_EXT_UDPENCAP] && 1470 (!udpencap_enable || 1471 smsg->sadb_msg_satype != SADB_SATYPE_ESP)) { 1472 rval = EINVAL; 1473 goto ret; 1474 } 1475 #endif /* IPSEC */ 1476 1477 NET_LOCK(); 1478 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1479 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1480 1481 /* We can't add an existing SA! */ 1482 if (sa2 != NULL) { 1483 rval = EEXIST; 1484 NET_UNLOCK(); 1485 goto ret; 1486 } 1487 1488 /* We can only add "mature" SAs */ 1489 if (ssa->sadb_sa_state != SADB_SASTATE_MATURE) { 1490 rval = EINVAL; 1491 NET_UNLOCK(); 1492 goto ret; 1493 } 1494 1495 { 1496 struct tdb *newsa; 1497 struct ipsecinit ii; 1498 int alg; 1499 1500 /* Create new TDB */ 1501 newsa = tdb_alloc(rdomain); 1502 newsa->tdb_satype = smsg->sadb_msg_satype; 1503 1504 if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype, 1505 &newsa->tdb_sproto, &alg))) { 1506 tdb_unref(newsa); 1507 NET_UNLOCK(); 1508 goto ret; 1509 } 1510 1511 /* Initialize SA */ 1512 bzero(&ii, sizeof(struct ipsecinit)); 1513 import_sa(newsa, headers[SADB_EXT_SA], &ii); 1514 import_address(&newsa->tdb_src.sa, 1515 headers[SADB_EXT_ADDRESS_SRC]); 1516 import_address(&newsa->tdb_dst.sa, 1517 headers[SADB_EXT_ADDRESS_DST]); 1518 1519 import_lifetime(newsa, 1520 headers[SADB_EXT_LIFETIME_CURRENT], 1521 PFKEYV2_LIFETIME_CURRENT); 1522 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT], 1523 PFKEYV2_LIFETIME_SOFT); 1524 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD], 1525 PFKEYV2_LIFETIME_HARD); 1526 1527 import_key(&ii, headers[SADB_EXT_KEY_AUTH], 1528 PFKEYV2_AUTHENTICATION_KEY); 1529 import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT], 1530 PFKEYV2_ENCRYPTION_KEY); 1531 1532 import_identities(&newsa->tdb_ids, 1533 newsa->tdb_ids_swapped, 1534 headers[SADB_EXT_IDENTITY_SRC], 1535 headers[SADB_EXT_IDENTITY_DST]); 1536 1537 if ((rval = import_flow(&newsa->tdb_filter, 1538 &newsa->tdb_filtermask, 1539 headers[SADB_X_EXT_SRC_FLOW], 1540 headers[SADB_X_EXT_SRC_MASK], 1541 headers[SADB_X_EXT_DST_FLOW], 1542 headers[SADB_X_EXT_DST_MASK], 1543 headers[SADB_X_EXT_PROTOCOL], 1544 headers[SADB_X_EXT_FLOW_TYPE]))) { 1545 tdb_unref(newsa); 1546 NET_UNLOCK(); 1547 goto ret; 1548 } 1549 import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]); 1550 import_rdomain(newsa, headers[SADB_X_EXT_RDOMAIN]); 1551 #if NPF > 0 1552 import_tag(newsa, headers[SADB_X_EXT_TAG]); 1553 import_tap(newsa, headers[SADB_X_EXT_TAP]); 1554 #endif 1555 import_iface(newsa, headers[SADB_X_EXT_IFACE]); 1556 1557 /* Exclude sensitive data from reply message. */ 1558 headers[SADB_EXT_KEY_AUTH] = NULL; 1559 headers[SADB_EXT_KEY_ENCRYPT] = NULL; 1560 headers[SADB_X_EXT_LOCAL_AUTH] = NULL; 1561 headers[SADB_X_EXT_REMOTE_AUTH] = NULL; 1562 1563 newsa->tdb_seq = smsg->sadb_msg_seq; 1564 1565 rval = tdb_init(newsa, alg, &ii); 1566 if (rval) { 1567 rval = EINVAL; 1568 tdb_unref(newsa); 1569 NET_UNLOCK(); 1570 goto ret; 1571 } 1572 1573 tdb_addtimeouts(newsa); 1574 1575 /* Add TDB in table */ 1576 puttdb(newsa); 1577 } 1578 NET_UNLOCK(); 1579 1580 break; 1581 1582 case SADB_DELETE: 1583 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1584 sunionp = 1585 (union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] + 1586 sizeof(struct sadb_address)); 1587 1588 NET_LOCK(); 1589 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1590 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1591 if (sa2 == NULL) { 1592 rval = ESRCH; 1593 NET_UNLOCK(); 1594 goto ret; 1595 } 1596 1597 tdb_delete(sa2); 1598 NET_UNLOCK(); 1599 1600 break; 1601 1602 case SADB_X_ASKPOLICY: 1603 /* Get the relevant policy */ 1604 NET_LOCK(); 1605 ipa = ipsec_get_acquire(((struct sadb_x_policy *) 1606 headers[SADB_X_EXT_POLICY])->sadb_x_policy_seq); 1607 if (ipa == NULL) { 1608 rval = ESRCH; 1609 NET_UNLOCK(); 1610 goto ret; 1611 } 1612 1613 rval = pfkeyv2_policy(ipa, headers, &freeme, &freeme_sz); 1614 NET_UNLOCK(); 1615 ipsec_unref_acquire(ipa); 1616 if (rval) 1617 mode = PFKEYV2_SENDMESSAGE_UNICAST; 1618 1619 break; 1620 1621 case SADB_GET: 1622 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1623 sunionp = 1624 (union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] + 1625 sizeof(struct sadb_address)); 1626 1627 NET_LOCK(); 1628 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1629 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1630 if (sa2 == NULL) { 1631 rval = ESRCH; 1632 NET_UNLOCK(); 1633 goto ret; 1634 } 1635 1636 rval = pfkeyv2_get(sa2, headers, &freeme, &freeme_sz, NULL); 1637 NET_UNLOCK(); 1638 if (rval) 1639 mode = PFKEYV2_SENDMESSAGE_UNICAST; 1640 1641 break; 1642 1643 case SADB_REGISTER: 1644 keylock(kp); 1645 if (!(kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED)) { 1646 kp->kcb_flags |= PFKEYV2_SOCKETFLAGS_REGISTERED; 1647 mtx_enter(&pfkeyv2_mtx); 1648 nregistered++; 1649 mtx_leave(&pfkeyv2_mtx); 1650 } 1651 keyunlock(kp); 1652 1653 freeme_sz = sizeof(struct sadb_supported) + sizeof(ealgs); 1654 if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT | M_ZERO))) { 1655 rval = ENOMEM; 1656 goto ret; 1657 } 1658 1659 ssup = (struct sadb_supported *) freeme; 1660 ssup->sadb_supported_len = freeme_sz / sizeof(uint64_t); 1661 1662 { 1663 void *p = freeme + sizeof(struct sadb_supported); 1664 1665 bcopy(&ealgs[0], p, sizeof(ealgs)); 1666 } 1667 1668 headers[SADB_EXT_SUPPORTED_ENCRYPT] = freeme; 1669 1670 freeme2_sz = sizeof(struct sadb_supported) + sizeof(aalgs); 1671 if (!(freeme2 = malloc(freeme2_sz, M_PFKEY, 1672 M_NOWAIT | M_ZERO))) { 1673 rval = ENOMEM; 1674 goto ret; 1675 } 1676 1677 /* Keep track what this socket has registered for */ 1678 keylock(kp); 1679 kp->kcb_reg |= 1680 (1 << ((struct sadb_msg *)message)->sadb_msg_satype); 1681 keyunlock(kp); 1682 1683 ssup = (struct sadb_supported *) freeme2; 1684 ssup->sadb_supported_len = freeme2_sz / sizeof(uint64_t); 1685 1686 { 1687 void *p = freeme2 + sizeof(struct sadb_supported); 1688 1689 bcopy(&aalgs[0], p, sizeof(aalgs)); 1690 } 1691 1692 headers[SADB_EXT_SUPPORTED_AUTH] = freeme2; 1693 1694 freeme3_sz = sizeof(struct sadb_supported) + sizeof(calgs); 1695 if (!(freeme3 = malloc(freeme3_sz, M_PFKEY, 1696 M_NOWAIT | M_ZERO))) { 1697 rval = ENOMEM; 1698 goto ret; 1699 } 1700 1701 ssup = (struct sadb_supported *) freeme3; 1702 ssup->sadb_supported_len = freeme3_sz / sizeof(uint64_t); 1703 1704 { 1705 void *p = freeme3 + sizeof(struct sadb_supported); 1706 1707 bcopy(&calgs[0], p, sizeof(calgs)); 1708 } 1709 1710 headers[SADB_X_EXT_SUPPORTED_COMP] = freeme3; 1711 1712 break; 1713 1714 case SADB_ACQUIRE: 1715 case SADB_EXPIRE: 1716 /* Nothing to handle */ 1717 rval = 0; 1718 break; 1719 1720 case SADB_FLUSH: 1721 rval = 0; 1722 1723 NET_LOCK(); 1724 switch (smsg->sadb_msg_satype) { 1725 case SADB_SATYPE_UNSPEC: 1726 spd_table_walk(rdomain, pfkeyv2_policy_flush, NULL); 1727 /* FALLTHROUGH */ 1728 case SADB_SATYPE_AH: 1729 case SADB_SATYPE_ESP: 1730 case SADB_X_SATYPE_IPIP: 1731 case SADB_X_SATYPE_IPCOMP: 1732 #ifdef TCP_SIGNATURE 1733 case SADB_X_SATYPE_TCPSIGNATURE: 1734 #endif /* TCP_SIGNATURE */ 1735 tdb_walk(rdomain, pfkeyv2_sa_flush, 1736 (u_int8_t *) &(smsg->sadb_msg_satype)); 1737 1738 break; 1739 1740 default: 1741 rval = EINVAL; /* Unknown/unsupported type */ 1742 } 1743 NET_UNLOCK(); 1744 1745 break; 1746 1747 case SADB_DUMP: 1748 { 1749 struct dump_state dump_state; 1750 dump_state.sadb_msg = (struct sadb_msg *) headers[0]; 1751 dump_state.socket = so; 1752 1753 NET_LOCK(); 1754 rval = tdb_walk(rdomain, pfkeyv2_dump_walker, &dump_state); 1755 NET_UNLOCK(); 1756 if (!rval) 1757 goto realret; 1758 if ((rval == ENOMEM) || (rval == ENOBUFS)) 1759 rval = 0; 1760 } 1761 break; 1762 1763 case SADB_X_GRPSPIS: 1764 { 1765 struct tdb *tdb1, *tdb2, *tdb3; 1766 struct sadb_protocol *sa_proto; 1767 1768 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1769 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] + 1770 sizeof(struct sadb_address)); 1771 1772 NET_LOCK(); 1773 tdb1 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1774 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1775 if (tdb1 == NULL) { 1776 rval = ESRCH; 1777 NET_UNLOCK(); 1778 goto ret; 1779 } 1780 1781 ssa = (struct sadb_sa *) headers[SADB_X_EXT_SA2]; 1782 sunionp = (union sockaddr_union *) (headers[SADB_X_EXT_DST2] + 1783 sizeof(struct sadb_address)); 1784 sa_proto = (struct sadb_protocol *) headers[SADB_X_EXT_SATYPE2]; 1785 1786 /* optionally fetch tdb2 from rdomain2 */ 1787 tdb2 = gettdb(srdomain ? srdomain->sadb_x_rdomain_dom2 : rdomain, 1788 ssa->sadb_sa_spi, sunionp, 1789 SADB_X_GETSPROTO(sa_proto->sadb_protocol_proto)); 1790 if (tdb2 == NULL) { 1791 tdb_unref(tdb1); 1792 rval = ESRCH; 1793 NET_UNLOCK(); 1794 goto ret; 1795 } 1796 1797 /* Detect cycles */ 1798 for (tdb3 = tdb2; tdb3; tdb3 = tdb3->tdb_onext) 1799 if (tdb3 == tdb1) { 1800 tdb_unref(tdb1); 1801 tdb_unref(tdb2); 1802 rval = ESRCH; 1803 NET_UNLOCK(); 1804 goto ret; 1805 } 1806 1807 /* Maintenance */ 1808 if ((tdb1->tdb_onext) && 1809 (tdb1->tdb_onext->tdb_inext == tdb1)) { 1810 tdb_unref(tdb1->tdb_onext->tdb_inext); 1811 tdb1->tdb_onext->tdb_inext = NULL; 1812 } 1813 1814 if ((tdb2->tdb_inext) && 1815 (tdb2->tdb_inext->tdb_onext == tdb2)) { 1816 tdb_unref(tdb2->tdb_inext->tdb_onext); 1817 tdb2->tdb_inext->tdb_onext = NULL; 1818 } 1819 1820 /* Link them */ 1821 tdb1->tdb_onext = tdb2; 1822 tdb2->tdb_inext = tdb1; 1823 NET_UNLOCK(); 1824 } 1825 break; 1826 1827 case SADB_X_DELFLOW: 1828 delflag = 1; 1829 /*FALLTHROUGH*/ 1830 case SADB_X_ADDFLOW: 1831 { 1832 struct sadb_protocol *sab; 1833 union sockaddr_union *ssrc; 1834 int exists = 0; 1835 1836 NET_LOCK(); 1837 if ((rnh = spd_table_add(rdomain)) == NULL) { 1838 rval = ENOMEM; 1839 NET_UNLOCK(); 1840 goto ret; 1841 } 1842 1843 sab = (struct sadb_protocol *) headers[SADB_X_EXT_FLOW_TYPE]; 1844 1845 if ((sab->sadb_protocol_direction != IPSP_DIRECTION_IN) && 1846 (sab->sadb_protocol_direction != IPSP_DIRECTION_OUT)) { 1847 rval = EINVAL; 1848 NET_UNLOCK(); 1849 goto ret; 1850 } 1851 1852 /* If the security protocol wasn't specified, pretend it was ESP */ 1853 if (smsg->sadb_msg_satype == 0) 1854 smsg->sadb_msg_satype = SADB_SATYPE_ESP; 1855 1856 if (headers[SADB_EXT_ADDRESS_DST]) 1857 sunionp = (union sockaddr_union *) 1858 (headers[SADB_EXT_ADDRESS_DST] + 1859 sizeof(struct sadb_address)); 1860 else 1861 sunionp = NULL; 1862 1863 if (headers[SADB_EXT_ADDRESS_SRC]) 1864 ssrc = (union sockaddr_union *) 1865 (headers[SADB_EXT_ADDRESS_SRC] + 1866 sizeof(struct sadb_address)); 1867 else 1868 ssrc = NULL; 1869 1870 if ((rval = import_flow(&encapdst, &encapnetmask, 1871 headers[SADB_X_EXT_SRC_FLOW], headers[SADB_X_EXT_SRC_MASK], 1872 headers[SADB_X_EXT_DST_FLOW], headers[SADB_X_EXT_DST_MASK], 1873 headers[SADB_X_EXT_PROTOCOL], 1874 headers[SADB_X_EXT_FLOW_TYPE]))) { 1875 NET_UNLOCK(); 1876 goto ret; 1877 } 1878 1879 /* Determine whether the exact same SPD entry already exists. */ 1880 if ((rn = rn_match(&encapdst, rnh)) != NULL) { 1881 ipo = (struct ipsec_policy *)rn; 1882 1883 /* Verify that the entry is identical */ 1884 if (bcmp(&ipo->ipo_addr, &encapdst, 1885 sizeof(struct sockaddr_encap)) || 1886 bcmp(&ipo->ipo_mask, &encapnetmask, 1887 sizeof(struct sockaddr_encap))) 1888 ipo = NULL; /* Fall through */ 1889 else 1890 exists = 1; 1891 } else 1892 ipo = NULL; 1893 1894 /* 1895 * If the existing policy is static, only delete or update 1896 * it if the new one is also static. 1897 */ 1898 if (exists && (ipo->ipo_flags & IPSP_POLICY_STATIC)) { 1899 if (!(sab->sadb_protocol_flags & 1900 SADB_X_POLICYFLAGS_POLICY)) { 1901 NET_UNLOCK(); 1902 goto ret; 1903 } 1904 } 1905 1906 /* Delete ? */ 1907 if (delflag) { 1908 if (exists) { 1909 rval = ipsec_delete_policy(ipo); 1910 NET_UNLOCK(); 1911 goto ret; 1912 } 1913 1914 /* If we were asked to delete something non-existent, error. */ 1915 rval = ESRCH; 1916 NET_UNLOCK(); 1917 break; 1918 } 1919 1920 if (!exists) { 1921 /* Allocate policy entry */ 1922 ipo = pool_get(&ipsec_policy_pool, PR_NOWAIT|PR_ZERO); 1923 if (ipo == NULL) { 1924 rval = ENOMEM; 1925 NET_UNLOCK(); 1926 goto ret; 1927 } 1928 } 1929 1930 switch (sab->sadb_protocol_proto) { 1931 case SADB_X_FLOW_TYPE_USE: 1932 ipo->ipo_type = IPSP_IPSEC_USE; 1933 break; 1934 1935 case SADB_X_FLOW_TYPE_ACQUIRE: 1936 ipo->ipo_type = IPSP_IPSEC_ACQUIRE; 1937 break; 1938 1939 case SADB_X_FLOW_TYPE_REQUIRE: 1940 ipo->ipo_type = IPSP_IPSEC_REQUIRE; 1941 break; 1942 1943 case SADB_X_FLOW_TYPE_DENY: 1944 ipo->ipo_type = IPSP_DENY; 1945 break; 1946 1947 case SADB_X_FLOW_TYPE_BYPASS: 1948 ipo->ipo_type = IPSP_PERMIT; 1949 break; 1950 1951 case SADB_X_FLOW_TYPE_DONTACQ: 1952 ipo->ipo_type = IPSP_IPSEC_DONTACQ; 1953 break; 1954 1955 default: 1956 if (!exists) 1957 pool_put(&ipsec_policy_pool, ipo); 1958 else 1959 ipsec_delete_policy(ipo); 1960 1961 rval = EINVAL; 1962 NET_UNLOCK(); 1963 goto ret; 1964 } 1965 1966 if (sab->sadb_protocol_flags & SADB_X_POLICYFLAGS_POLICY) 1967 ipo->ipo_flags |= IPSP_POLICY_STATIC; 1968 1969 if (sunionp) 1970 bcopy(sunionp, &ipo->ipo_dst, 1971 sizeof(union sockaddr_union)); 1972 else 1973 bzero(&ipo->ipo_dst, sizeof(union sockaddr_union)); 1974 1975 if (ssrc) 1976 bcopy(ssrc, &ipo->ipo_src, 1977 sizeof(union sockaddr_union)); 1978 else 1979 bzero(&ipo->ipo_src, sizeof(union sockaddr_union)); 1980 1981 ipo->ipo_sproto = SADB_X_GETSPROTO(smsg->sadb_msg_satype); 1982 1983 if (ipo->ipo_ids) { 1984 ipsp_ids_free(ipo->ipo_ids); 1985 ipo->ipo_ids = NULL; 1986 } 1987 1988 if ((sid = headers[SADB_EXT_IDENTITY_SRC]) != NULL && 1989 (did = headers[SADB_EXT_IDENTITY_DST]) != NULL) { 1990 import_identities(&ipo->ipo_ids, 0, sid, did); 1991 if (ipo->ipo_ids == NULL) { 1992 if (exists) 1993 ipsec_delete_policy(ipo); 1994 else 1995 pool_put(&ipsec_policy_pool, ipo); 1996 rval = ENOBUFS; 1997 NET_UNLOCK(); 1998 goto ret; 1999 } 2000 } 2001 2002 /* Flow type */ 2003 if (!exists) { 2004 /* Initialize policy entry */ 2005 bcopy(&encapdst, &ipo->ipo_addr, 2006 sizeof(struct sockaddr_encap)); 2007 bcopy(&encapnetmask, &ipo->ipo_mask, 2008 sizeof(struct sockaddr_encap)); 2009 2010 TAILQ_INIT(&ipo->ipo_acquires); 2011 ipo->ipo_rdomain = rdomain; 2012 refcnt_init(&ipo->ipo_refcnt); 2013 2014 /* Add SPD entry */ 2015 if ((rnh = spd_table_get(rdomain)) == NULL || 2016 (rn = rn_addroute((caddr_t)&ipo->ipo_addr, 2017 (caddr_t)&ipo->ipo_mask, rnh, 2018 ipo->ipo_nodes, 0)) == NULL) { 2019 /* Remove from linked list of policies on TDB */ 2020 mtx_enter(&ipo_tdb_mtx); 2021 if (ipo->ipo_tdb != NULL) { 2022 TAILQ_REMOVE( 2023 &ipo->ipo_tdb->tdb_policy_head, 2024 ipo, ipo_tdb_next); 2025 tdb_unref(ipo->ipo_tdb); 2026 ipo->ipo_tdb = NULL; 2027 } 2028 mtx_leave(&ipo_tdb_mtx); 2029 if (ipo->ipo_ids) 2030 ipsp_ids_free(ipo->ipo_ids); 2031 pool_put(&ipsec_policy_pool, ipo); 2032 NET_UNLOCK(); 2033 goto ret; 2034 } 2035 TAILQ_INSERT_HEAD(&ipsec_policy_head, ipo, ipo_list); 2036 ipsec_in_use++; 2037 } else { 2038 ipo->ipo_last_searched = ipo->ipo_flags = 0; 2039 } 2040 NET_UNLOCK(); 2041 } 2042 break; 2043 2044 case SADB_X_PROMISC: 2045 if (len >= 2 * sizeof(struct sadb_msg)) { 2046 struct mbuf *packet; 2047 2048 if ((rval = pfdatatopacket(message, len, &packet)) != 0) 2049 goto ret; 2050 2051 SRPL_FOREACH(bkp, &sr, &pkptable.pkp_list, kcb_list) { 2052 if (bkp == kp || bkp->kcb_rdomain != kp->kcb_rdomain) 2053 continue; 2054 2055 if (!smsg->sadb_msg_seq || 2056 (smsg->sadb_msg_seq == kp->kcb_pid)) { 2057 keylock(bkp); 2058 pfkey_sendup(bkp, packet, 1); 2059 keyunlock(bkp); 2060 } 2061 } 2062 SRPL_LEAVE(&sr); 2063 2064 m_freem(packet); 2065 } else { 2066 if (len != sizeof(struct sadb_msg)) { 2067 rval = EINVAL; 2068 goto ret; 2069 } 2070 2071 keylock(kp); 2072 i = (kp->kcb_flags & 2073 PFKEYV2_SOCKETFLAGS_PROMISC) ? 1 : 0; 2074 j = smsg->sadb_msg_satype ? 1 : 0; 2075 2076 if (i ^ j) { 2077 if (j) { 2078 kp->kcb_flags |= 2079 PFKEYV2_SOCKETFLAGS_PROMISC; 2080 mtx_enter(&pfkeyv2_mtx); 2081 npromisc++; 2082 mtx_leave(&pfkeyv2_mtx); 2083 } else { 2084 kp->kcb_flags &= 2085 ~PFKEYV2_SOCKETFLAGS_PROMISC; 2086 mtx_enter(&pfkeyv2_mtx); 2087 npromisc--; 2088 mtx_leave(&pfkeyv2_mtx); 2089 } 2090 } 2091 keyunlock(kp); 2092 } 2093 2094 break; 2095 2096 default: 2097 rval = EINVAL; 2098 goto ret; 2099 } 2100 2101 ret: 2102 if (rval) { 2103 if ((rval == EINVAL) || (rval == ENOMEM) || (rval == ENOBUFS)) 2104 goto realret; 2105 2106 for (i = 1; i <= SADB_EXT_MAX; i++) 2107 headers[i] = NULL; 2108 2109 smsg->sadb_msg_errno = abs(rval); 2110 } else { 2111 uint64_t seen = 0LL; 2112 2113 for (i = 1; i <= SADB_EXT_MAX; i++) 2114 if (headers[i]) 2115 seen |= (1LL << i); 2116 2117 if ((seen & sadb_exts_allowed_out[smsg->sadb_msg_type]) 2118 != seen) { 2119 rval = EPERM; 2120 goto realret; 2121 } 2122 2123 if ((seen & sadb_exts_required_out[smsg->sadb_msg_type]) != 2124 sadb_exts_required_out[smsg->sadb_msg_type]) { 2125 rval = EPERM; 2126 goto realret; 2127 } 2128 } 2129 2130 rval = pfkeyv2_sendmessage(headers, mode, so, 0, 0, kp->kcb_rdomain); 2131 2132 realret: 2133 2134 if (freeme != NULL) 2135 explicit_bzero(freeme, freeme_sz); 2136 free(freeme, M_PFKEY, freeme_sz); 2137 free(freeme2, M_PFKEY, freeme2_sz); 2138 free(freeme3, M_PFKEY, freeme3_sz); 2139 2140 explicit_bzero(message, len); 2141 free(message, M_PFKEY, len); 2142 2143 free(sa1, M_PFKEY, sizeof(*sa1)); 2144 2145 NET_LOCK(); 2146 tdb_unref(sa2); 2147 NET_UNLOCK(); 2148 2149 return (rval); 2150 } 2151 2152 /* 2153 * Send an ACQUIRE message to key management, to get a new SA. 2154 */ 2155 int 2156 pfkeyv2_acquire(struct ipsec_policy *ipo, union sockaddr_union *gw, 2157 union sockaddr_union *laddr, u_int32_t *seq, struct sockaddr_encap *ddst) 2158 { 2159 void *p, *headers[SADB_EXT_MAX + 1], *buffer = NULL; 2160 struct sadb_comb *sadb_comb; 2161 struct sadb_address *sadd; 2162 struct sadb_prop *sa_prop; 2163 struct sadb_msg *smsg; 2164 int rval = 0; 2165 int i, j, registered; 2166 2167 mtx_enter(&pfkeyv2_mtx); 2168 *seq = pfkeyv2_seq++; 2169 2170 registered = nregistered; 2171 mtx_leave(&pfkeyv2_mtx); 2172 2173 if (!registered) { 2174 rval = ESRCH; 2175 goto ret; 2176 } 2177 2178 /* How large a buffer do we need... XXX we only do one proposal for now */ 2179 i = sizeof(struct sadb_msg) + 2180 (laddr == NULL ? 0 : sizeof(struct sadb_address) + 2181 PADUP(ipo->ipo_src.sa.sa_len)) + 2182 sizeof(struct sadb_address) + PADUP(gw->sa.sa_len) + 2183 sizeof(struct sadb_prop) + 1 * sizeof(struct sadb_comb); 2184 2185 if (ipo->ipo_ids) { 2186 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_local->len); 2187 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_remote->len); 2188 } 2189 2190 /* Allocate */ 2191 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 2192 rval = ENOMEM; 2193 goto ret; 2194 } 2195 2196 bzero(headers, sizeof(headers)); 2197 2198 buffer = p; 2199 2200 headers[0] = p; 2201 p += sizeof(struct sadb_msg); 2202 2203 smsg = (struct sadb_msg *) headers[0]; 2204 smsg->sadb_msg_version = PF_KEY_V2; 2205 smsg->sadb_msg_type = SADB_ACQUIRE; 2206 smsg->sadb_msg_len = i / sizeof(uint64_t); 2207 smsg->sadb_msg_seq = *seq; 2208 2209 if (ipo->ipo_sproto == IPPROTO_ESP) 2210 smsg->sadb_msg_satype = SADB_SATYPE_ESP; 2211 else if (ipo->ipo_sproto == IPPROTO_AH) 2212 smsg->sadb_msg_satype = SADB_SATYPE_AH; 2213 else if (ipo->ipo_sproto == IPPROTO_IPCOMP) 2214 smsg->sadb_msg_satype = SADB_X_SATYPE_IPCOMP; 2215 2216 if (laddr) { 2217 headers[SADB_EXT_ADDRESS_SRC] = p; 2218 p += sizeof(struct sadb_address) + PADUP(laddr->sa.sa_len); 2219 sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_SRC]; 2220 sadd->sadb_address_len = (sizeof(struct sadb_address) + 2221 laddr->sa.sa_len + sizeof(uint64_t) - 1) / 2222 sizeof(uint64_t); 2223 bcopy(laddr, headers[SADB_EXT_ADDRESS_SRC] + 2224 sizeof(struct sadb_address), laddr->sa.sa_len); 2225 } 2226 2227 headers[SADB_EXT_ADDRESS_DST] = p; 2228 p += sizeof(struct sadb_address) + PADUP(gw->sa.sa_len); 2229 sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_DST]; 2230 sadd->sadb_address_len = (sizeof(struct sadb_address) + 2231 gw->sa.sa_len + sizeof(uint64_t) - 1) / sizeof(uint64_t); 2232 bcopy(gw, headers[SADB_EXT_ADDRESS_DST] + sizeof(struct sadb_address), 2233 gw->sa.sa_len); 2234 2235 if (ipo->ipo_ids) 2236 export_identities(&p, ipo->ipo_ids, 0, headers); 2237 2238 headers[SADB_EXT_PROPOSAL] = p; 2239 p += sizeof(struct sadb_prop); 2240 sa_prop = (struct sadb_prop *) headers[SADB_EXT_PROPOSAL]; 2241 sa_prop->sadb_prop_num = 1; /* XXX One proposal only */ 2242 sa_prop->sadb_prop_len = (sizeof(struct sadb_prop) + 2243 (sizeof(struct sadb_comb) * sa_prop->sadb_prop_num)) / 2244 sizeof(uint64_t); 2245 2246 sadb_comb = p; 2247 2248 /* XXX Should actually ask the crypto layer what's supported */ 2249 for (j = 0; j < sa_prop->sadb_prop_num; j++) { 2250 sadb_comb->sadb_comb_flags = 0; 2251 #ifdef IPSEC 2252 if (ipsec_require_pfs) 2253 sadb_comb->sadb_comb_flags |= SADB_SAFLAGS_PFS; 2254 2255 /* Set the encryption algorithm */ 2256 if (ipo->ipo_sproto == IPPROTO_ESP) { 2257 if (!strncasecmp(ipsec_def_enc, "aes", 2258 sizeof("aes"))) { 2259 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AES; 2260 sadb_comb->sadb_comb_encrypt_minbits = 128; 2261 sadb_comb->sadb_comb_encrypt_maxbits = 256; 2262 } else if (!strncasecmp(ipsec_def_enc, "aesctr", 2263 sizeof("aesctr"))) { 2264 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AESCTR; 2265 sadb_comb->sadb_comb_encrypt_minbits = 128+32; 2266 sadb_comb->sadb_comb_encrypt_maxbits = 256+32; 2267 } else if (!strncasecmp(ipsec_def_enc, "3des", 2268 sizeof("3des"))) { 2269 sadb_comb->sadb_comb_encrypt = SADB_EALG_3DESCBC; 2270 sadb_comb->sadb_comb_encrypt_minbits = 192; 2271 sadb_comb->sadb_comb_encrypt_maxbits = 192; 2272 } else if (!strncasecmp(ipsec_def_enc, "blowfish", 2273 sizeof("blowfish"))) { 2274 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_BLF; 2275 sadb_comb->sadb_comb_encrypt_minbits = 40; 2276 sadb_comb->sadb_comb_encrypt_maxbits = BLF_MAXKEYLEN * 8; 2277 } else if (!strncasecmp(ipsec_def_enc, "cast128", 2278 sizeof("cast128"))) { 2279 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_CAST; 2280 sadb_comb->sadb_comb_encrypt_minbits = 40; 2281 sadb_comb->sadb_comb_encrypt_maxbits = 128; 2282 } 2283 } else if (ipo->ipo_sproto == IPPROTO_IPCOMP) { 2284 /* Set the compression algorithm */ 2285 if (!strncasecmp(ipsec_def_comp, "deflate", 2286 sizeof("deflate"))) { 2287 sadb_comb->sadb_comb_encrypt = SADB_X_CALG_DEFLATE; 2288 sadb_comb->sadb_comb_encrypt_minbits = 0; 2289 sadb_comb->sadb_comb_encrypt_maxbits = 0; 2290 } 2291 } 2292 2293 /* Set the authentication algorithm */ 2294 if (!strncasecmp(ipsec_def_auth, "hmac-sha1", 2295 sizeof("hmac-sha1"))) { 2296 sadb_comb->sadb_comb_auth = SADB_AALG_SHA1HMAC; 2297 sadb_comb->sadb_comb_auth_minbits = 160; 2298 sadb_comb->sadb_comb_auth_maxbits = 160; 2299 } else if (!strncasecmp(ipsec_def_auth, "hmac-ripemd160", 2300 sizeof("hmac_ripemd160"))) { 2301 sadb_comb->sadb_comb_auth = SADB_X_AALG_RIPEMD160HMAC; 2302 sadb_comb->sadb_comb_auth_minbits = 160; 2303 sadb_comb->sadb_comb_auth_maxbits = 160; 2304 } else if (!strncasecmp(ipsec_def_auth, "hmac-md5", 2305 sizeof("hmac-md5"))) { 2306 sadb_comb->sadb_comb_auth = SADB_AALG_MD5HMAC; 2307 sadb_comb->sadb_comb_auth_minbits = 128; 2308 sadb_comb->sadb_comb_auth_maxbits = 128; 2309 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-256", 2310 sizeof("hmac-sha2-256"))) { 2311 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_256; 2312 sadb_comb->sadb_comb_auth_minbits = 256; 2313 sadb_comb->sadb_comb_auth_maxbits = 256; 2314 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-384", 2315 sizeof("hmac-sha2-384"))) { 2316 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_384; 2317 sadb_comb->sadb_comb_auth_minbits = 384; 2318 sadb_comb->sadb_comb_auth_maxbits = 384; 2319 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-512", 2320 sizeof("hmac-sha2-512"))) { 2321 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_512; 2322 sadb_comb->sadb_comb_auth_minbits = 512; 2323 sadb_comb->sadb_comb_auth_maxbits = 512; 2324 } 2325 2326 sadb_comb->sadb_comb_soft_allocations = ipsec_soft_allocations; 2327 sadb_comb->sadb_comb_hard_allocations = ipsec_exp_allocations; 2328 2329 sadb_comb->sadb_comb_soft_bytes = ipsec_soft_bytes; 2330 sadb_comb->sadb_comb_hard_bytes = ipsec_exp_bytes; 2331 2332 sadb_comb->sadb_comb_soft_addtime = ipsec_soft_timeout; 2333 sadb_comb->sadb_comb_hard_addtime = ipsec_exp_timeout; 2334 2335 sadb_comb->sadb_comb_soft_usetime = ipsec_soft_first_use; 2336 sadb_comb->sadb_comb_hard_usetime = ipsec_exp_first_use; 2337 #endif 2338 sadb_comb++; 2339 } 2340 2341 /* Send the ACQUIRE message to all compliant registered listeners. */ 2342 if ((rval = pfkeyv2_sendmessage(headers, 2343 PFKEYV2_SENDMESSAGE_REGISTERED, NULL, smsg->sadb_msg_satype, 0, 2344 ipo->ipo_rdomain)) != 0) 2345 goto ret; 2346 2347 rval = 0; 2348 ret: 2349 if (buffer != NULL) { 2350 explicit_bzero(buffer, i); 2351 free(buffer, M_PFKEY, i); 2352 } 2353 2354 return (rval); 2355 } 2356 2357 /* 2358 * Notify key management that an expiration went off. The second argument 2359 * specifies the type of expiration (soft or hard). 2360 */ 2361 int 2362 pfkeyv2_expire(struct tdb *tdb, u_int16_t type) 2363 { 2364 void *p, *headers[SADB_EXT_MAX+1], *buffer = NULL; 2365 struct sadb_msg *smsg; 2366 int rval = 0; 2367 int i; 2368 2369 NET_ASSERT_LOCKED(); 2370 2371 switch (tdb->tdb_sproto) { 2372 case IPPROTO_AH: 2373 case IPPROTO_ESP: 2374 case IPPROTO_IPIP: 2375 case IPPROTO_IPCOMP: 2376 #ifdef TCP_SIGNATURE 2377 case IPPROTO_TCP: 2378 #endif /* TCP_SIGNATURE */ 2379 break; 2380 2381 default: 2382 rval = EOPNOTSUPP; 2383 goto ret; 2384 } 2385 2386 i = sizeof(struct sadb_msg) + sizeof(struct sadb_sa) + 2387 2 * sizeof(struct sadb_lifetime) + 2388 sizeof(struct sadb_address) + PADUP(tdb->tdb_src.sa.sa_len) + 2389 sizeof(struct sadb_address) + PADUP(tdb->tdb_dst.sa.sa_len); 2390 2391 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 2392 rval = ENOMEM; 2393 goto ret; 2394 } 2395 2396 bzero(headers, sizeof(headers)); 2397 2398 buffer = p; 2399 2400 headers[0] = p; 2401 p += sizeof(struct sadb_msg); 2402 2403 smsg = (struct sadb_msg *) headers[0]; 2404 smsg->sadb_msg_version = PF_KEY_V2; 2405 smsg->sadb_msg_type = SADB_EXPIRE; 2406 smsg->sadb_msg_satype = tdb->tdb_satype; 2407 smsg->sadb_msg_len = i / sizeof(uint64_t); 2408 2409 mtx_enter(&pfkeyv2_mtx); 2410 smsg->sadb_msg_seq = pfkeyv2_seq++; 2411 mtx_leave(&pfkeyv2_mtx); 2412 2413 headers[SADB_EXT_SA] = p; 2414 export_sa(&p, tdb); 2415 2416 headers[SADB_EXT_LIFETIME_CURRENT] = p; 2417 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_CURRENT); 2418 2419 headers[type] = p; 2420 export_lifetime(&p, tdb, type == SADB_EXT_LIFETIME_SOFT ? 2421 PFKEYV2_LIFETIME_SOFT : PFKEYV2_LIFETIME_HARD); 2422 2423 headers[SADB_EXT_ADDRESS_SRC] = p; 2424 export_address(&p, &tdb->tdb_src.sa); 2425 2426 headers[SADB_EXT_ADDRESS_DST] = p; 2427 export_address(&p, &tdb->tdb_dst.sa); 2428 2429 if ((rval = pfkeyv2_sendmessage(headers, PFKEYV2_SENDMESSAGE_BROADCAST, 2430 NULL, 0, 0, tdb->tdb_rdomain)) != 0) 2431 goto ret; 2432 /* XXX */ 2433 if (tdb->tdb_rdomain != tdb->tdb_rdomain_post) 2434 if ((rval = pfkeyv2_sendmessage(headers, 2435 PFKEYV2_SENDMESSAGE_BROADCAST, NULL, 0, 0, 2436 tdb->tdb_rdomain_post)) != 0) 2437 goto ret; 2438 2439 rval = 0; 2440 2441 ret: 2442 if (buffer != NULL) { 2443 explicit_bzero(buffer, i); 2444 free(buffer, M_PFKEY, i); 2445 } 2446 2447 return (rval); 2448 } 2449 2450 struct pfkeyv2_sysctl_walk { 2451 void *w_where; 2452 size_t w_len; 2453 int w_op; 2454 u_int8_t w_satype; 2455 }; 2456 2457 int 2458 pfkeyv2_sysctl_walker(struct tdb *tdb, void *arg, int last) 2459 { 2460 struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg; 2461 void *buffer = NULL; 2462 int error = 0; 2463 int usedlen, buflen, i; 2464 2465 if (w->w_satype != SADB_SATYPE_UNSPEC && 2466 w->w_satype != tdb->tdb_satype) 2467 return (0); 2468 2469 if (w->w_where) { 2470 void *headers[SADB_EXT_MAX+1]; 2471 struct sadb_msg msg; 2472 2473 bzero(headers, sizeof(headers)); 2474 if ((error = pfkeyv2_get(tdb, headers, &buffer, &buflen, 2475 &usedlen)) != 0) 2476 goto done; 2477 if (w->w_len < sizeof(msg) + usedlen) { 2478 error = ENOMEM; 2479 goto done; 2480 } 2481 /* prepend header */ 2482 bzero(&msg, sizeof(msg)); 2483 msg.sadb_msg_version = PF_KEY_V2; 2484 msg.sadb_msg_satype = tdb->tdb_satype; 2485 msg.sadb_msg_type = SADB_DUMP; 2486 msg.sadb_msg_len = (sizeof(msg) + usedlen) / sizeof(uint64_t); 2487 if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0) 2488 goto done; 2489 w->w_where += sizeof(msg); 2490 w->w_len -= sizeof(msg); 2491 /* set extension type */ 2492 for (i = 1; i <= SADB_EXT_MAX; i++) 2493 if (headers[i]) 2494 ((struct sadb_ext *) 2495 headers[i])->sadb_ext_type = i; 2496 if ((error = copyout(buffer, w->w_where, usedlen)) != 0) 2497 goto done; 2498 w->w_where += usedlen; 2499 w->w_len -= usedlen; 2500 } else { 2501 if ((error = pfkeyv2_get(tdb, NULL, NULL, &buflen, NULL)) != 0) 2502 return (error); 2503 w->w_len += buflen; 2504 w->w_len += sizeof(struct sadb_msg); 2505 } 2506 2507 done: 2508 if (buffer != NULL) { 2509 explicit_bzero(buffer, buflen); 2510 free(buffer, M_PFKEY, buflen); 2511 } 2512 return (error); 2513 } 2514 2515 int 2516 pfkeyv2_dump_policy(struct ipsec_policy *ipo, void **headers, void **buffer, 2517 int *lenp) 2518 { 2519 int i, rval, perm; 2520 void *p; 2521 2522 /* Find how much space we need. */ 2523 i = 2 * sizeof(struct sadb_protocol); 2524 2525 /* We'll need four of them: src, src mask, dst, dst mask. */ 2526 switch (ipo->ipo_addr.sen_type) { 2527 case SENT_IP4: 2528 i += 4 * PADUP(sizeof(struct sockaddr_in)); 2529 i += 4 * sizeof(struct sadb_address); 2530 break; 2531 #ifdef INET6 2532 case SENT_IP6: 2533 i += 4 * PADUP(sizeof(struct sockaddr_in6)); 2534 i += 4 * sizeof(struct sadb_address); 2535 break; 2536 #endif /* INET6 */ 2537 default: 2538 return (EINVAL); 2539 } 2540 2541 /* Local address, might be zeroed. */ 2542 switch (ipo->ipo_src.sa.sa_family) { 2543 case 0: 2544 break; 2545 case AF_INET: 2546 i += PADUP(sizeof(struct sockaddr_in)); 2547 i += sizeof(struct sadb_address); 2548 break; 2549 #ifdef INET6 2550 case AF_INET6: 2551 i += PADUP(sizeof(struct sockaddr_in6)); 2552 i += sizeof(struct sadb_address); 2553 break; 2554 #endif /* INET6 */ 2555 default: 2556 return (EINVAL); 2557 } 2558 2559 /* Remote address, might be zeroed. XXX ??? */ 2560 switch (ipo->ipo_dst.sa.sa_family) { 2561 case 0: 2562 break; 2563 case AF_INET: 2564 i += PADUP(sizeof(struct sockaddr_in)); 2565 i += sizeof(struct sadb_address); 2566 break; 2567 #ifdef INET6 2568 case AF_INET6: 2569 i += PADUP(sizeof(struct sockaddr_in6)); 2570 i += sizeof(struct sadb_address); 2571 break; 2572 #endif /* INET6 */ 2573 default: 2574 return (EINVAL); 2575 } 2576 2577 if (ipo->ipo_ids) { 2578 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_local->len); 2579 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_remote->len); 2580 } 2581 2582 if (lenp) 2583 *lenp = i; 2584 2585 if (buffer == NULL) { 2586 rval = 0; 2587 goto ret; 2588 } 2589 2590 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 2591 rval = ENOMEM; 2592 goto ret; 2593 } else 2594 *buffer = p; 2595 2596 /* Local address. */ 2597 if (ipo->ipo_src.sa.sa_family) { 2598 headers[SADB_EXT_ADDRESS_SRC] = p; 2599 export_address(&p, &ipo->ipo_src.sa); 2600 } 2601 2602 /* Remote address. */ 2603 if (ipo->ipo_dst.sa.sa_family) { 2604 headers[SADB_EXT_ADDRESS_DST] = p; 2605 export_address(&p, &ipo->ipo_dst.sa); 2606 } 2607 2608 /* Get actual flow. */ 2609 export_flow(&p, ipo->ipo_type, &ipo->ipo_addr, &ipo->ipo_mask, 2610 headers); 2611 2612 /* Add ids only when we are root. */ 2613 perm = suser(curproc); 2614 if (perm == 0 && ipo->ipo_ids) 2615 export_identities(&p, ipo->ipo_ids, 0, headers); 2616 2617 rval = 0; 2618 ret: 2619 return (rval); 2620 } 2621 2622 int 2623 pfkeyv2_sysctl_policydumper(struct ipsec_policy *ipo, void *arg, 2624 unsigned int tableid) 2625 { 2626 struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg; 2627 void *buffer = NULL; 2628 int i, buflen, error = 0; 2629 2630 if (w->w_where) { 2631 void *headers[SADB_EXT_MAX + 1]; 2632 struct sadb_msg msg; 2633 2634 bzero(headers, sizeof(headers)); 2635 if ((error = pfkeyv2_dump_policy(ipo, headers, &buffer, 2636 &buflen)) != 0) 2637 goto done; 2638 if (w->w_len < buflen) { 2639 error = ENOMEM; 2640 goto done; 2641 } 2642 /* prepend header */ 2643 bzero(&msg, sizeof(msg)); 2644 msg.sadb_msg_version = PF_KEY_V2; 2645 if (ipo->ipo_sproto == IPPROTO_ESP) 2646 msg.sadb_msg_satype = SADB_SATYPE_ESP; 2647 else if (ipo->ipo_sproto == IPPROTO_AH) 2648 msg.sadb_msg_satype = SADB_SATYPE_AH; 2649 else if (ipo->ipo_sproto == IPPROTO_IPCOMP) 2650 msg.sadb_msg_satype = SADB_X_SATYPE_IPCOMP; 2651 else if (ipo->ipo_sproto == IPPROTO_IPIP) 2652 msg.sadb_msg_satype = SADB_X_SATYPE_IPIP; 2653 msg.sadb_msg_type = SADB_X_SPDDUMP; 2654 msg.sadb_msg_len = (sizeof(msg) + buflen) / sizeof(uint64_t); 2655 if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0) 2656 goto done; 2657 w->w_where += sizeof(msg); 2658 w->w_len -= sizeof(msg); 2659 /* set extension type */ 2660 for (i = 1; i <= SADB_EXT_MAX; i++) 2661 if (headers[i]) 2662 ((struct sadb_ext *) 2663 headers[i])->sadb_ext_type = i; 2664 if ((error = copyout(buffer, w->w_where, buflen)) != 0) 2665 goto done; 2666 w->w_where += buflen; 2667 w->w_len -= buflen; 2668 } else { 2669 if ((error = pfkeyv2_dump_policy(ipo, NULL, NULL, 2670 &buflen)) != 0) 2671 goto done; 2672 w->w_len += buflen; 2673 w->w_len += sizeof(struct sadb_msg); 2674 } 2675 2676 done: 2677 if (buffer) 2678 free(buffer, M_PFKEY, buflen); 2679 return (error); 2680 } 2681 2682 int 2683 pfkeyv2_policy_flush(struct ipsec_policy *ipo, void *arg, unsigned int tableid) 2684 { 2685 int error; 2686 2687 error = ipsec_delete_policy(ipo); 2688 if (error == 0) 2689 error = EAGAIN; 2690 2691 return (error); 2692 } 2693 2694 int 2695 pfkeyv2_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 2696 void *new, size_t newlen) 2697 { 2698 struct pfkeyv2_sysctl_walk w; 2699 int error = EINVAL; 2700 u_int rdomain; 2701 u_int tableid; 2702 2703 if (new) 2704 return (EPERM); 2705 if (namelen < 1) 2706 return (EINVAL); 2707 w.w_op = name[0]; 2708 w.w_satype = name[1]; 2709 w.w_where = oldp; 2710 w.w_len = oldp ? *oldlenp : 0; 2711 2712 if (namelen == 3) { 2713 tableid = name[2]; 2714 if (!rtable_exists(tableid)) 2715 return (ENOENT); 2716 } else 2717 tableid = curproc->p_p->ps_rtableid; 2718 rdomain = rtable_l2(tableid); 2719 2720 switch(w.w_op) { 2721 case NET_KEY_SADB_DUMP: 2722 if ((error = suser(curproc)) != 0) 2723 return (error); 2724 NET_LOCK(); 2725 error = tdb_walk(rdomain, pfkeyv2_sysctl_walker, &w); 2726 NET_UNLOCK(); 2727 if (oldp) 2728 *oldlenp = w.w_where - oldp; 2729 else 2730 *oldlenp = w.w_len; 2731 break; 2732 2733 case NET_KEY_SPD_DUMP: 2734 NET_LOCK_SHARED(); 2735 error = spd_table_walk(rdomain, 2736 pfkeyv2_sysctl_policydumper, &w); 2737 NET_UNLOCK_SHARED(); 2738 if (oldp) 2739 *oldlenp = w.w_where - oldp; 2740 else 2741 *oldlenp = w.w_len; 2742 break; 2743 } 2744 2745 return (error); 2746 } 2747