1 /* $OpenBSD: pfkeyv2.c,v 1.208 2020/12/14 20:20:06 tobhe 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 { SADB_X_CALG_LZS, 0, 0, 0} 123 }; 124 125 extern uint64_t sadb_exts_allowed_out[SADB_MAX+1]; 126 extern uint64_t sadb_exts_required_out[SADB_MAX+1]; 127 128 extern struct pool ipsec_policy_pool; 129 130 extern struct radix_node_head **spd_tables; 131 132 struct pool pkpcb_pool; 133 #define PFKEY_MSG_MAXSZ 4096 134 const struct sockaddr pfkey_addr = { 2, PF_KEY, }; 135 struct domain pfkeydomain; 136 137 /* 138 * pfkey PCB 139 * 140 * Locks used to protect struct members in this file: 141 * I immutable after creation 142 * a atomic operations 143 * l pkptable's lock 144 * s socket lock 145 */ 146 struct pkpcb { 147 struct socket *kcb_socket; /* [I] associated socket */ 148 149 SRPL_ENTRY(pkpcb) kcb_list; /* [l] */ 150 struct refcnt kcb_refcnt; /* [a] */ 151 int kcb_flags; /* [s] */ 152 uint32_t kcb_reg; /* [s] Inc if SATYPE_MAX > 31 */ 153 uint32_t kcb_pid; /* [I] */ 154 unsigned int kcb_rdomain; /* [I] routing domain */ 155 }; 156 #define sotokeycb(so) ((struct pkpcb *)(so)->so_pcb) 157 #define keylock(kp) solock((kp)->kcb_socket) 158 #define keyunlock(kp, s) sounlock((kp)->kcb_socket, s) 159 160 161 struct dump_state { 162 struct sadb_msg *sadb_msg; 163 struct socket *socket; 164 }; 165 166 struct pkptable { 167 SRPL_HEAD(, pkpcb) pkp_list; 168 struct srpl_rc pkp_rc; 169 struct rwlock pkp_lk; 170 }; 171 172 struct pkptable pkptable; 173 struct mutex pfkeyv2_mtx = MUTEX_INITIALIZER(IPL_MPFLOOR); 174 static uint32_t pfkeyv2_seq = 1; 175 static int nregistered = 0; 176 static int npromisc = 0; 177 178 void pfkey_init(void); 179 180 int pfkeyv2_attach(struct socket *, int); 181 int pfkeyv2_detach(struct socket *); 182 int pfkeyv2_usrreq(struct socket *, int, struct mbuf *, struct mbuf *, 183 struct mbuf *, struct proc *); 184 int pfkeyv2_output(struct mbuf *, struct socket *, struct sockaddr *, 185 struct mbuf *); 186 int pfkey_sendup(struct pkpcb *, struct mbuf *, int); 187 int pfkeyv2_sa_flush(struct tdb *, void *, int); 188 int pfkeyv2_policy_flush(struct ipsec_policy *, void *, unsigned int); 189 int pfkeyv2_sysctl_policydumper(struct ipsec_policy *, void *, unsigned int); 190 191 void keycb_ref(void *, void *); 192 void keycb_unref(void *, void *); 193 194 /* 195 * Wrapper around m_devget(); copy data from contiguous buffer to mbuf 196 * chain. 197 */ 198 int 199 pfdatatopacket(void *data, int len, struct mbuf **packet) 200 { 201 if (!(*packet = m_devget(data, len, 0))) 202 return (ENOMEM); 203 204 /* Make sure, all data gets zeroized on free */ 205 (*packet)->m_flags |= M_ZEROIZE; 206 207 return (0); 208 } 209 210 static struct protosw pfkeysw[] = { 211 { 212 .pr_type = SOCK_RAW, 213 .pr_domain = &pfkeydomain, 214 .pr_protocol = PF_KEY_V2, 215 .pr_flags = PR_ATOMIC | PR_ADDR, 216 .pr_output = pfkeyv2_output, 217 .pr_usrreq = pfkeyv2_usrreq, 218 .pr_attach = pfkeyv2_attach, 219 .pr_detach = pfkeyv2_detach, 220 .pr_sysctl = pfkeyv2_sysctl, 221 } 222 }; 223 224 struct domain pfkeydomain = { 225 .dom_family = PF_KEY, 226 .dom_name = "PF_KEY", 227 .dom_init = pfkey_init, 228 .dom_protosw = pfkeysw, 229 .dom_protoswNPROTOSW = &pfkeysw[nitems(pfkeysw)], 230 }; 231 232 void 233 keycb_ref(void *null, void *v) 234 { 235 struct pkpcb *kp = v; 236 237 refcnt_take(&kp->kcb_refcnt); 238 } 239 240 void 241 keycb_unref(void *null, void *v) 242 { 243 struct pkpcb *kp = v; 244 245 refcnt_rele_wake(&kp->kcb_refcnt); 246 } 247 248 void 249 pfkey_init(void) 250 { 251 rn_init(sizeof(struct sockaddr_encap)); 252 srpl_rc_init(&pkptable.pkp_rc, keycb_ref, keycb_unref, NULL); 253 rw_init(&pkptable.pkp_lk, "pfkey"); 254 SRPL_INIT(&pkptable.pkp_list); 255 pool_init(&pkpcb_pool, sizeof(struct pkpcb), 0, 256 IPL_NONE, PR_WAITOK, "pkpcb", NULL); 257 } 258 259 260 /* 261 * Attach a new PF_KEYv2 socket. 262 */ 263 int 264 pfkeyv2_attach(struct socket *so, int proto) 265 { 266 struct pkpcb *kp; 267 int error; 268 269 if ((so->so_state & SS_PRIV) == 0) 270 return EACCES; 271 272 kp = pool_get(&pkpcb_pool, PR_WAITOK|PR_ZERO); 273 so->so_pcb = kp; 274 refcnt_init(&kp->kcb_refcnt); 275 276 error = soreserve(so, PFKEYSNDQ, PFKEYRCVQ); 277 if (error) { 278 pool_put(&pkpcb_pool, kp); 279 return (error); 280 } 281 282 kp->kcb_socket = so; 283 284 so->so_options |= SO_USELOOPBACK; 285 soisconnected(so); 286 287 kp->kcb_pid = curproc->p_p->ps_pid; 288 kp->kcb_rdomain = rtable_l2(curproc->p_p->ps_rtableid); 289 290 rw_enter(&pkptable.pkp_lk, RW_WRITE); 291 SRPL_INSERT_HEAD_LOCKED(&pkptable.pkp_rc, &pkptable.pkp_list, kp, kcb_list); 292 rw_exit(&pkptable.pkp_lk); 293 294 return (0); 295 } 296 297 /* 298 * Close a PF_KEYv2 socket. 299 */ 300 int 301 pfkeyv2_detach(struct socket *so) 302 { 303 struct pkpcb *kp; 304 305 soassertlocked(so); 306 307 kp = sotokeycb(so); 308 if (kp == NULL) 309 return ENOTCONN; 310 311 if (kp->kcb_flags & 312 (PFKEYV2_SOCKETFLAGS_REGISTERED|PFKEYV2_SOCKETFLAGS_PROMISC)) { 313 mtx_enter(&pfkeyv2_mtx); 314 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED) 315 nregistered--; 316 317 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC) 318 npromisc--; 319 mtx_leave(&pfkeyv2_mtx); 320 } 321 322 rw_enter(&pkptable.pkp_lk, RW_WRITE); 323 SRPL_REMOVE_LOCKED(&pkptable.pkp_rc, &pkptable.pkp_list, kp, pkpcb, 324 kcb_list); 325 rw_exit(&pkptable.pkp_lk); 326 327 /* wait for all references to drop */ 328 refcnt_finalize(&kp->kcb_refcnt, "pfkeyrefs"); 329 330 so->so_pcb = NULL; 331 KASSERT((so->so_state & SS_NOFDREF) == 0); 332 pool_put(&pkpcb_pool, kp); 333 334 return (0); 335 } 336 337 int 338 pfkeyv2_usrreq(struct socket *so, int req, struct mbuf *m, 339 struct mbuf *nam, struct mbuf *control, struct proc *p) 340 { 341 struct pkpcb *kp; 342 int error = 0; 343 344 if (req == PRU_CONTROL) 345 return (EOPNOTSUPP); 346 347 soassertlocked(so); 348 349 if (control && control->m_len) { 350 error = EOPNOTSUPP; 351 goto release; 352 } 353 354 kp = sotokeycb(so); 355 if (kp == NULL) { 356 error = EINVAL; 357 goto release; 358 } 359 360 switch (req) { 361 /* no connect, bind, accept. Socket is connected from the start */ 362 case PRU_CONNECT: 363 case PRU_BIND: 364 case PRU_CONNECT2: 365 case PRU_LISTEN: 366 case PRU_ACCEPT: 367 error = EOPNOTSUPP; 368 break; 369 370 case PRU_DISCONNECT: 371 case PRU_ABORT: 372 soisdisconnected(so); 373 break; 374 case PRU_SHUTDOWN: 375 socantsendmore(so); 376 break; 377 case PRU_SENSE: 378 /* stat: don't bother with a blocksize. */ 379 break; 380 381 /* minimal support, just implement a fake peer address */ 382 case PRU_SOCKADDR: 383 error = EINVAL; 384 break; 385 case PRU_PEERADDR: 386 bcopy(&pfkey_addr, mtod(nam, caddr_t), pfkey_addr.sa_len); 387 nam->m_len = pfkey_addr.sa_len; 388 break; 389 390 case PRU_RCVOOB: 391 case PRU_RCVD: 392 case PRU_SENDOOB: 393 error = EOPNOTSUPP; 394 break; 395 case PRU_SEND: 396 if (nam) { 397 error = EISCONN; 398 break; 399 } 400 error = (*so->so_proto->pr_output)(m, so, NULL, NULL); 401 m = NULL; 402 break; 403 default: 404 panic("pfkeyv2_usrreq"); 405 } 406 407 release: 408 if (req != PRU_RCVD && req != PRU_RCVOOB && req != PRU_SENSE) { 409 m_freem(control); 410 m_freem(m); 411 } 412 return (error); 413 } 414 415 int 416 pfkeyv2_output(struct mbuf *mbuf, struct socket *so, 417 struct sockaddr *dstaddr, struct mbuf *control) 418 { 419 void *message; 420 int error = 0; 421 422 #ifdef DIAGNOSTIC 423 if (!mbuf || !(mbuf->m_flags & M_PKTHDR)) { 424 error = EINVAL; 425 goto ret; 426 } 427 #endif /* DIAGNOSTIC */ 428 429 if (mbuf->m_pkthdr.len > PFKEY_MSG_MAXSZ) { 430 error = EMSGSIZE; 431 goto ret; 432 } 433 434 if (!(message = malloc((unsigned long) mbuf->m_pkthdr.len, 435 M_PFKEY, M_DONTWAIT))) { 436 error = ENOMEM; 437 goto ret; 438 } 439 440 m_copydata(mbuf, 0, mbuf->m_pkthdr.len, message); 441 442 error = pfkeyv2_send(so, message, mbuf->m_pkthdr.len); 443 444 ret: 445 m_freem(mbuf); 446 return (error); 447 } 448 449 int 450 pfkey_sendup(struct pkpcb *kp, struct mbuf *m0, int more) 451 { 452 struct socket *so = kp->kcb_socket; 453 struct mbuf *m; 454 455 soassertlocked(so); 456 457 if (more) { 458 if (!(m = m_dup_pkt(m0, 0, M_DONTWAIT))) 459 return (ENOMEM); 460 } else 461 m = m0; 462 463 if (!sbappendaddr(so, &so->so_rcv, &pfkey_addr, m, NULL)) { 464 m_freem(m); 465 return (ENOBUFS); 466 } 467 468 sorwakeup(so); 469 return (0); 470 } 471 472 /* 473 * Send a PFKEYv2 message, possibly to many receivers, based on the 474 * satype of the socket (which is set by the REGISTER message), and the 475 * third argument. 476 */ 477 int 478 pfkeyv2_sendmessage(void **headers, int mode, struct socket *so, 479 u_int8_t satype, int count, u_int rdomain) 480 { 481 int i, j, rval, s; 482 void *p, *buffer = NULL; 483 struct mbuf *packet; 484 struct pkpcb *kp; 485 struct sadb_msg *smsg; 486 struct srp_ref sr; 487 488 /* Find out how much space we'll need... */ 489 j = sizeof(struct sadb_msg); 490 491 for (i = 1; i <= SADB_EXT_MAX; i++) 492 if (headers[i]) 493 j += ((struct sadb_ext *)headers[i])->sadb_ext_len * 494 sizeof(uint64_t); 495 496 /* ...and allocate it */ 497 if (!(buffer = malloc(j + sizeof(struct sadb_msg), M_PFKEY, 498 M_NOWAIT))) { 499 rval = ENOMEM; 500 goto ret; 501 } 502 503 p = buffer + sizeof(struct sadb_msg); 504 bcopy(headers[0], p, sizeof(struct sadb_msg)); 505 ((struct sadb_msg *) p)->sadb_msg_len = j / sizeof(uint64_t); 506 p += sizeof(struct sadb_msg); 507 508 /* Copy payloads in the packet */ 509 for (i = 1; i <= SADB_EXT_MAX; i++) 510 if (headers[i]) { 511 ((struct sadb_ext *) headers[i])->sadb_ext_type = i; 512 bcopy(headers[i], p, EXTLEN(headers[i])); 513 p += EXTLEN(headers[i]); 514 } 515 516 if ((rval = pfdatatopacket(buffer + sizeof(struct sadb_msg), 517 j, &packet)) != 0) 518 goto ret; 519 520 switch (mode) { 521 case PFKEYV2_SENDMESSAGE_UNICAST: 522 /* 523 * Send message to the specified socket, plus all 524 * promiscuous listeners. 525 */ 526 s = solock(so); 527 pfkey_sendup(sotokeycb(so), packet, 0); 528 sounlock(so, s); 529 530 /* 531 * Promiscuous messages contain the original message 532 * encapsulated in another sadb_msg header. 533 */ 534 bzero(buffer, sizeof(struct sadb_msg)); 535 smsg = (struct sadb_msg *) buffer; 536 smsg->sadb_msg_version = PF_KEY_V2; 537 smsg->sadb_msg_type = SADB_X_PROMISC; 538 smsg->sadb_msg_len = (sizeof(struct sadb_msg) + j) / 539 sizeof(uint64_t); 540 smsg->sadb_msg_seq = 0; 541 542 /* Copy to mbuf chain */ 543 if ((rval = pfdatatopacket(buffer, sizeof(struct sadb_msg) + j, 544 &packet)) != 0) 545 goto ret; 546 547 /* 548 * Search for promiscuous listeners, skipping the 549 * original destination. 550 */ 551 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) { 552 if (kp->kcb_socket == so || kp->kcb_rdomain != rdomain) 553 continue; 554 555 s = keylock(kp); 556 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC) 557 pfkey_sendup(kp, packet, 1); 558 keyunlock(kp, s); 559 } 560 SRPL_LEAVE(&sr); 561 m_freem(packet); 562 break; 563 564 case PFKEYV2_SENDMESSAGE_REGISTERED: 565 /* 566 * Send the message to all registered sockets that match 567 * the specified satype (e.g., all IPSEC-ESP negotiators) 568 */ 569 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) { 570 if (kp->kcb_rdomain != rdomain) 571 continue; 572 573 s = keylock(kp); 574 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED) { 575 if (!satype) { 576 /* Just send to everyone registered */ 577 pfkey_sendup(kp, packet, 1); 578 } else { 579 /* Check for specified satype */ 580 if ((1 << satype) & kp->kcb_reg) 581 pfkey_sendup(kp, packet, 1); 582 } 583 } 584 keyunlock(kp, s); 585 } 586 SRPL_LEAVE(&sr); 587 /* Free last/original copy of the packet */ 588 m_freem(packet); 589 590 /* Encapsulate the original message "inside" an sadb_msg header */ 591 bzero(buffer, sizeof(struct sadb_msg)); 592 smsg = (struct sadb_msg *) buffer; 593 smsg->sadb_msg_version = PF_KEY_V2; 594 smsg->sadb_msg_type = SADB_X_PROMISC; 595 smsg->sadb_msg_len = (sizeof(struct sadb_msg) + j) / 596 sizeof(uint64_t); 597 smsg->sadb_msg_seq = 0; 598 599 /* Convert to mbuf chain */ 600 if ((rval = pfdatatopacket(buffer, sizeof(struct sadb_msg) + j, 601 &packet)) != 0) 602 goto ret; 603 604 /* Send to all registered promiscuous listeners */ 605 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) { 606 if (kp->kcb_rdomain != rdomain) 607 continue; 608 609 s = keylock(kp); 610 if ((kp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC) && 611 !(kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED)) 612 pfkey_sendup(kp, packet, 1); 613 keyunlock(kp, s); 614 } 615 SRPL_LEAVE(&sr); 616 m_freem(packet); 617 break; 618 619 case PFKEYV2_SENDMESSAGE_BROADCAST: 620 /* Send message to all sockets */ 621 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) { 622 if (kp->kcb_rdomain != rdomain) 623 continue; 624 625 s = keylock(kp); 626 pfkey_sendup(kp, packet, 1); 627 keyunlock(kp, s); 628 } 629 SRPL_LEAVE(&sr); 630 m_freem(packet); 631 break; 632 } 633 634 ret: 635 if (buffer != NULL) { 636 explicit_bzero(buffer, j + sizeof(struct sadb_msg)); 637 free(buffer, M_PFKEY, j + sizeof(struct sadb_msg)); 638 } 639 640 return (rval); 641 } 642 643 /* 644 * Get SPD information for an ACQUIRE. We setup the message such that 645 * the SRC/DST payloads are relative to us (regardless of whether the 646 * SPD rule was for incoming or outgoing packets). 647 */ 648 int 649 pfkeyv2_policy(struct ipsec_acquire *ipa, void **headers, void **buffer, 650 int *bufferlen) 651 { 652 union sockaddr_union sunion; 653 struct sadb_protocol *sp; 654 int rval, i, dir; 655 void *p; 656 657 /* Find out how big a buffer we need */ 658 i = 4 * sizeof(struct sadb_address) + sizeof(struct sadb_protocol); 659 bzero(&sunion, sizeof(union sockaddr_union)); 660 661 switch (ipa->ipa_info.sen_type) { 662 case SENT_IP4: 663 i += 4 * PADUP(sizeof(struct sockaddr_in)); 664 sunion.sa.sa_family = AF_INET; 665 sunion.sa.sa_len = sizeof(struct sockaddr_in); 666 dir = ipa->ipa_info.sen_direction; 667 break; 668 669 #ifdef INET6 670 case SENT_IP6: 671 i += 4 * PADUP(sizeof(struct sockaddr_in6)); 672 sunion.sa.sa_family = AF_INET6; 673 sunion.sa.sa_len = sizeof(struct sockaddr_in6); 674 dir = ipa->ipa_info.sen_ip6_direction; 675 break; 676 #endif /* INET6 */ 677 678 default: 679 return (EINVAL); 680 } 681 682 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 683 rval = ENOMEM; 684 goto ret; 685 } else { 686 *buffer = p; 687 *bufferlen = i; 688 } 689 690 if (dir == IPSP_DIRECTION_OUT) 691 headers[SADB_X_EXT_SRC_FLOW] = p; 692 else 693 headers[SADB_X_EXT_DST_FLOW] = p; 694 switch (sunion.sa.sa_family) { 695 case AF_INET: 696 sunion.sin.sin_addr = ipa->ipa_info.sen_ip_src; 697 sunion.sin.sin_port = ipa->ipa_info.sen_sport; 698 break; 699 700 #ifdef INET6 701 case AF_INET6: 702 sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_src; 703 sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_sport; 704 break; 705 #endif /* INET6 */ 706 } 707 export_address(&p, &sunion.sa); 708 709 if (dir == IPSP_DIRECTION_OUT) 710 headers[SADB_X_EXT_SRC_MASK] = p; 711 else 712 headers[SADB_X_EXT_DST_MASK] = p; 713 switch (sunion.sa.sa_family) { 714 case AF_INET: 715 sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_src; 716 sunion.sin.sin_port = ipa->ipa_mask.sen_sport; 717 break; 718 719 #ifdef INET6 720 case AF_INET6: 721 sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_src; 722 sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_sport; 723 break; 724 #endif /* INET6 */ 725 } 726 export_address(&p, &sunion.sa); 727 728 if (dir == IPSP_DIRECTION_OUT) 729 headers[SADB_X_EXT_DST_FLOW] = p; 730 else 731 headers[SADB_X_EXT_SRC_FLOW] = p; 732 switch (sunion.sa.sa_family) { 733 case AF_INET: 734 sunion.sin.sin_addr = ipa->ipa_info.sen_ip_dst; 735 sunion.sin.sin_port = ipa->ipa_info.sen_dport; 736 break; 737 738 #ifdef INET6 739 case AF_INET6: 740 sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_dst; 741 sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_dport; 742 break; 743 #endif /* INET6 */ 744 } 745 export_address(&p, &sunion.sa); 746 747 if (dir == IPSP_DIRECTION_OUT) 748 headers[SADB_X_EXT_DST_MASK] = p; 749 else 750 headers[SADB_X_EXT_SRC_MASK] = p; 751 switch (sunion.sa.sa_family) { 752 case AF_INET: 753 sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_dst; 754 sunion.sin.sin_port = ipa->ipa_mask.sen_dport; 755 break; 756 757 #ifdef INET6 758 case AF_INET6: 759 sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_dst; 760 sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_dport; 761 break; 762 #endif /* INET6 */ 763 } 764 export_address(&p, &sunion.sa); 765 766 headers[SADB_X_EXT_FLOW_TYPE] = p; 767 sp = p; 768 sp->sadb_protocol_len = sizeof(struct sadb_protocol) / 769 sizeof(u_int64_t); 770 switch (sunion.sa.sa_family) { 771 case AF_INET: 772 if (ipa->ipa_mask.sen_proto) 773 sp->sadb_protocol_proto = ipa->ipa_info.sen_proto; 774 sp->sadb_protocol_direction = ipa->ipa_info.sen_direction; 775 break; 776 777 #ifdef INET6 778 case AF_INET6: 779 if (ipa->ipa_mask.sen_ip6_proto) 780 sp->sadb_protocol_proto = ipa->ipa_info.sen_ip6_proto; 781 sp->sadb_protocol_direction = ipa->ipa_info.sen_ip6_direction; 782 break; 783 #endif /* INET6 */ 784 } 785 786 rval = 0; 787 788 ret: 789 return (rval); 790 } 791 792 /* 793 * Get all the information contained in an SA to a PFKEYV2 message. 794 */ 795 int 796 pfkeyv2_get(struct tdb *tdb, void **headers, void **buffer, int *lenp, 797 int *lenused) 798 { 799 int rval, i; 800 void *p; 801 802 /* Find how much space we need */ 803 i = sizeof(struct sadb_sa) + sizeof(struct sadb_lifetime) + 804 sizeof(struct sadb_x_counter); 805 806 if (tdb->tdb_soft_allocations || tdb->tdb_soft_bytes || 807 tdb->tdb_soft_timeout || tdb->tdb_soft_first_use) 808 i += sizeof(struct sadb_lifetime); 809 810 if (tdb->tdb_exp_allocations || tdb->tdb_exp_bytes || 811 tdb->tdb_exp_timeout || tdb->tdb_exp_first_use) 812 i += sizeof(struct sadb_lifetime); 813 814 if (tdb->tdb_last_used) 815 i += sizeof(struct sadb_lifetime); 816 817 i += sizeof(struct sadb_address) + PADUP(tdb->tdb_src.sa.sa_len); 818 i += sizeof(struct sadb_address) + PADUP(tdb->tdb_dst.sa.sa_len); 819 820 if (tdb->tdb_ids) { 821 i += sizeof(struct sadb_ident) + PADUP(tdb->tdb_ids->id_local->len); 822 i += sizeof(struct sadb_ident) + PADUP(tdb->tdb_ids->id_remote->len); 823 } 824 825 if (tdb->tdb_amxkey) 826 i += sizeof(struct sadb_key) + PADUP(tdb->tdb_amxkeylen); 827 828 if (tdb->tdb_emxkey) 829 i += sizeof(struct sadb_key) + PADUP(tdb->tdb_emxkeylen); 830 831 if (tdb->tdb_filter.sen_type) { 832 i += 2 * sizeof(struct sadb_protocol); 833 834 /* We'll need four of them: src, src mask, dst, dst mask. */ 835 switch (tdb->tdb_filter.sen_type) { 836 case SENT_IP4: 837 i += 4 * PADUP(sizeof(struct sockaddr_in)); 838 i += 4 * sizeof(struct sadb_address); 839 break; 840 #ifdef INET6 841 case SENT_IP6: 842 i += 4 * PADUP(sizeof(struct sockaddr_in6)); 843 i += 4 * sizeof(struct sadb_address); 844 break; 845 #endif /* INET6 */ 846 default: 847 rval = EINVAL; 848 goto ret; 849 } 850 } 851 852 if (tdb->tdb_onext) { 853 i += sizeof(struct sadb_sa); 854 i += sizeof(struct sadb_address) + 855 PADUP(tdb->tdb_onext->tdb_dst.sa.sa_len); 856 i += sizeof(struct sadb_protocol); 857 } 858 859 if (tdb->tdb_udpencap_port) 860 i += sizeof(struct sadb_x_udpencap); 861 862 if (tdb->tdb_rdomain != tdb->tdb_rdomain_post) 863 i += sizeof(struct sadb_x_rdomain); 864 865 #if NPF > 0 866 if (tdb->tdb_tag) 867 i += sizeof(struct sadb_x_tag) + PADUP(PF_TAG_NAME_SIZE); 868 if (tdb->tdb_tap) 869 i += sizeof(struct sadb_x_tap); 870 #endif 871 872 if (lenp) 873 *lenp = i; 874 875 if (buffer == NULL) { 876 rval = 0; 877 goto ret; 878 } 879 880 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 881 rval = ENOMEM; 882 goto ret; 883 } else 884 *buffer = p; 885 886 headers[SADB_EXT_SA] = p; 887 888 export_sa(&p, tdb); /* Export SA information (mostly flags) */ 889 890 /* Export lifetimes where applicable */ 891 headers[SADB_EXT_LIFETIME_CURRENT] = p; 892 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_CURRENT); 893 894 if (tdb->tdb_soft_allocations || tdb->tdb_soft_bytes || 895 tdb->tdb_soft_first_use || tdb->tdb_soft_timeout) { 896 headers[SADB_EXT_LIFETIME_SOFT] = p; 897 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_SOFT); 898 } 899 900 if (tdb->tdb_exp_allocations || tdb->tdb_exp_bytes || 901 tdb->tdb_exp_first_use || tdb->tdb_exp_timeout) { 902 headers[SADB_EXT_LIFETIME_HARD] = p; 903 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_HARD); 904 } 905 906 if (tdb->tdb_last_used) { 907 headers[SADB_X_EXT_LIFETIME_LASTUSE] = p; 908 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_LASTUSE); 909 } 910 911 /* Export TDB source address */ 912 headers[SADB_EXT_ADDRESS_SRC] = p; 913 export_address(&p, &tdb->tdb_src.sa); 914 915 /* Export TDB destination address */ 916 headers[SADB_EXT_ADDRESS_DST] = p; 917 export_address(&p, &tdb->tdb_dst.sa); 918 919 /* Export source/destination identities, if present */ 920 if (tdb->tdb_ids) 921 export_identities(&p, tdb->tdb_ids, tdb->tdb_ids_swapped, headers); 922 923 /* Export authentication key, if present */ 924 if (tdb->tdb_amxkey) { 925 headers[SADB_EXT_KEY_AUTH] = p; 926 export_key(&p, tdb, PFKEYV2_AUTHENTICATION_KEY); 927 } 928 929 /* Export encryption key, if present */ 930 if (tdb->tdb_emxkey) { 931 headers[SADB_EXT_KEY_ENCRYPT] = p; 932 export_key(&p, tdb, PFKEYV2_ENCRYPTION_KEY); 933 } 934 935 /* Export flow/filter, if present */ 936 if (tdb->tdb_filter.sen_type) 937 export_flow(&p, IPSP_IPSEC_USE, &tdb->tdb_filter, 938 &tdb->tdb_filtermask, headers); 939 940 if (tdb->tdb_onext) { 941 headers[SADB_X_EXT_SA2] = p; 942 export_sa(&p, tdb->tdb_onext); 943 headers[SADB_X_EXT_DST2] = p; 944 export_address(&p, &tdb->tdb_onext->tdb_dst.sa); 945 headers[SADB_X_EXT_SATYPE2] = p; 946 export_satype(&p, tdb->tdb_onext); 947 } 948 949 /* Export UDP encapsulation port, if present */ 950 if (tdb->tdb_udpencap_port) { 951 headers[SADB_X_EXT_UDPENCAP] = p; 952 export_udpencap(&p, tdb); 953 } 954 955 /* Export rdomain switch, if present */ 956 if (tdb->tdb_rdomain != tdb->tdb_rdomain_post) { 957 headers[SADB_X_EXT_RDOMAIN] = p; 958 export_rdomain(&p, tdb); 959 } 960 961 #if NPF > 0 962 /* Export tag information, if present */ 963 if (tdb->tdb_tag) { 964 headers[SADB_X_EXT_TAG] = p; 965 export_tag(&p, tdb); 966 } 967 968 /* Export tap enc(4) device information, if present */ 969 if (tdb->tdb_tap) { 970 headers[SADB_X_EXT_TAP] = p; 971 export_tap(&p, tdb); 972 } 973 #endif 974 975 headers[SADB_X_EXT_COUNTER] = p; 976 export_counter(&p, tdb); 977 978 if (lenused) 979 *lenused = p - *buffer; 980 rval = 0; 981 982 ret: 983 return (rval); 984 } 985 986 /* 987 * Dump a TDB. 988 */ 989 int 990 pfkeyv2_dump_walker(struct tdb *tdb, void *state, int last) 991 { 992 struct dump_state *dump_state = (struct dump_state *) state; 993 void *headers[SADB_EXT_MAX+1], *buffer; 994 int buflen; 995 int rval; 996 997 /* If not satype was specified, dump all TDBs */ 998 if (!dump_state->sadb_msg->sadb_msg_satype || 999 (tdb->tdb_satype == dump_state->sadb_msg->sadb_msg_satype)) { 1000 bzero(headers, sizeof(headers)); 1001 headers[0] = (void *) dump_state->sadb_msg; 1002 1003 /* Get the information from the TDB to a PFKEYv2 message */ 1004 if ((rval = pfkeyv2_get(tdb, headers, &buffer, &buflen, NULL)) != 0) 1005 return (rval); 1006 1007 if (last) 1008 ((struct sadb_msg *)headers[0])->sadb_msg_seq = 0; 1009 1010 /* Send the message to the specified socket */ 1011 rval = pfkeyv2_sendmessage(headers, 1012 PFKEYV2_SENDMESSAGE_UNICAST, dump_state->socket, 0, 0, 1013 tdb->tdb_rdomain); 1014 1015 explicit_bzero(buffer, buflen); 1016 free(buffer, M_PFKEY, buflen); 1017 if (rval) 1018 return (rval); 1019 } 1020 1021 return (0); 1022 } 1023 1024 /* 1025 * Delete an SA. 1026 */ 1027 int 1028 pfkeyv2_sa_flush(struct tdb *tdb, void *satype_vp, int last) 1029 { 1030 if (!(*((u_int8_t *) satype_vp)) || 1031 tdb->tdb_satype == *((u_int8_t *) satype_vp)) 1032 tdb_delete(tdb); 1033 return (0); 1034 } 1035 1036 /* 1037 * Convert between SATYPEs and IPsec protocols, taking into consideration 1038 * sysctl variables enabling/disabling ESP/AH and the presence of the old 1039 * IPsec transforms. 1040 */ 1041 int 1042 pfkeyv2_get_proto_alg(u_int8_t satype, u_int8_t *sproto, int *alg) 1043 { 1044 switch (satype) { 1045 #ifdef IPSEC 1046 case SADB_SATYPE_AH: 1047 if (!ah_enable) 1048 return (EOPNOTSUPP); 1049 1050 *sproto = IPPROTO_AH; 1051 1052 if(alg != NULL) 1053 *alg = satype = XF_AH; 1054 1055 break; 1056 1057 case SADB_SATYPE_ESP: 1058 if (!esp_enable) 1059 return (EOPNOTSUPP); 1060 1061 *sproto = IPPROTO_ESP; 1062 1063 if(alg != NULL) 1064 *alg = satype = XF_ESP; 1065 1066 break; 1067 1068 case SADB_X_SATYPE_IPIP: 1069 *sproto = IPPROTO_IPIP; 1070 1071 if (alg != NULL) 1072 *alg = XF_IP4; 1073 1074 break; 1075 1076 case SADB_X_SATYPE_IPCOMP: 1077 if (!ipcomp_enable) 1078 return (EOPNOTSUPP); 1079 1080 *sproto = IPPROTO_IPCOMP; 1081 1082 if(alg != NULL) 1083 *alg = satype = XF_IPCOMP; 1084 1085 break; 1086 #endif /* IPSEC */ 1087 #ifdef TCP_SIGNATURE 1088 case SADB_X_SATYPE_TCPSIGNATURE: 1089 *sproto = IPPROTO_TCP; 1090 1091 if (alg != NULL) 1092 *alg = XF_TCPSIGNATURE; 1093 1094 break; 1095 #endif /* TCP_SIGNATURE */ 1096 1097 default: /* Nothing else supported */ 1098 return (EOPNOTSUPP); 1099 } 1100 1101 return (0); 1102 } 1103 1104 /* 1105 * Handle all messages from userland to kernel. 1106 */ 1107 int 1108 pfkeyv2_send(struct socket *so, void *message, int len) 1109 { 1110 int i, j, rval = 0, mode = PFKEYV2_SENDMESSAGE_BROADCAST; 1111 int delflag = 0; 1112 struct sockaddr_encap encapdst, encapnetmask; 1113 struct ipsec_policy *ipo; 1114 struct ipsec_acquire *ipa; 1115 struct radix_node_head *rnh; 1116 struct radix_node *rn = NULL; 1117 struct pkpcb *kp, *bkp; 1118 void *freeme = NULL, *freeme2 = NULL, *freeme3 = NULL; 1119 int freeme_sz = 0, freeme2_sz = 0, freeme3_sz = 0; 1120 void *bckptr = NULL; 1121 void *headers[SADB_EXT_MAX + 1]; 1122 union sockaddr_union *sunionp; 1123 struct tdb *sa1 = NULL, *sa2 = NULL; 1124 struct sadb_msg *smsg; 1125 struct sadb_spirange *sprng; 1126 struct sadb_sa *ssa; 1127 struct sadb_supported *ssup; 1128 struct sadb_ident *sid, *did; 1129 struct srp_ref sr; 1130 struct sadb_x_rdomain *srdomain; 1131 u_int rdomain = 0; 1132 int promisc, s; 1133 1134 mtx_enter(&pfkeyv2_mtx); 1135 promisc = npromisc; 1136 mtx_leave(&pfkeyv2_mtx); 1137 1138 /* Verify that we received this over a legitimate pfkeyv2 socket */ 1139 bzero(headers, sizeof(headers)); 1140 1141 kp = sotokeycb(so); 1142 if (!kp) { 1143 rval = EINVAL; 1144 goto ret; 1145 } 1146 1147 rdomain = kp->kcb_rdomain; 1148 1149 /* If we have any promiscuous listeners, send them a copy of the message */ 1150 if (promisc) { 1151 struct mbuf *packet; 1152 1153 freeme_sz = sizeof(struct sadb_msg) + len; 1154 if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT))) { 1155 rval = ENOMEM; 1156 goto ret; 1157 } 1158 1159 /* Initialize encapsulating header */ 1160 bzero(freeme, sizeof(struct sadb_msg)); 1161 smsg = (struct sadb_msg *) freeme; 1162 smsg->sadb_msg_version = PF_KEY_V2; 1163 smsg->sadb_msg_type = SADB_X_PROMISC; 1164 smsg->sadb_msg_len = (sizeof(struct sadb_msg) + len) / 1165 sizeof(uint64_t); 1166 smsg->sadb_msg_seq = curproc->p_p->ps_pid; 1167 1168 bcopy(message, freeme + sizeof(struct sadb_msg), len); 1169 1170 /* Convert to mbuf chain */ 1171 if ((rval = pfdatatopacket(freeme, freeme_sz, &packet)) != 0) 1172 goto ret; 1173 1174 /* Send to all promiscuous listeners */ 1175 SRPL_FOREACH(bkp, &sr, &pkptable.pkp_list, kcb_list) { 1176 if (bkp->kcb_rdomain != kp->kcb_rdomain) 1177 continue; 1178 1179 s = keylock(bkp); 1180 if (bkp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC) 1181 pfkey_sendup(bkp, packet, 1); 1182 keyunlock(bkp, s); 1183 } 1184 SRPL_LEAVE(&sr); 1185 1186 m_freem(packet); 1187 1188 /* Paranoid */ 1189 explicit_bzero(freeme, freeme_sz); 1190 free(freeme, M_PFKEY, freeme_sz); 1191 freeme = NULL; 1192 freeme_sz = 0; 1193 } 1194 1195 /* Validate message format */ 1196 if ((rval = pfkeyv2_parsemessage(message, len, headers)) != 0) 1197 goto ret; 1198 1199 /* use specified rdomain */ 1200 srdomain = (struct sadb_x_rdomain *) headers[SADB_X_EXT_RDOMAIN]; 1201 if (srdomain) { 1202 if (!rtable_exists(srdomain->sadb_x_rdomain_dom1) || 1203 !rtable_exists(srdomain->sadb_x_rdomain_dom2)) { 1204 rval = EINVAL; 1205 goto ret; 1206 } 1207 rdomain = srdomain->sadb_x_rdomain_dom1; 1208 } 1209 1210 smsg = (struct sadb_msg *) headers[0]; 1211 switch (smsg->sadb_msg_type) { 1212 case SADB_GETSPI: /* Reserve an SPI */ 1213 sa1 = malloc(sizeof (*sa1), M_PFKEY, M_NOWAIT | M_ZERO); 1214 if (sa1 == NULL) { 1215 rval = ENOMEM; 1216 goto ret; 1217 } 1218 1219 sa1->tdb_satype = smsg->sadb_msg_satype; 1220 if ((rval = pfkeyv2_get_proto_alg(sa1->tdb_satype, 1221 &sa1->tdb_sproto, 0))) 1222 goto ret; 1223 1224 import_address(&sa1->tdb_src.sa, headers[SADB_EXT_ADDRESS_SRC]); 1225 import_address(&sa1->tdb_dst.sa, headers[SADB_EXT_ADDRESS_DST]); 1226 1227 /* Find an unused SA identifier */ 1228 sprng = (struct sadb_spirange *) headers[SADB_EXT_SPIRANGE]; 1229 NET_LOCK(); 1230 sa1->tdb_spi = reserve_spi(rdomain, 1231 sprng->sadb_spirange_min, sprng->sadb_spirange_max, 1232 &sa1->tdb_src, &sa1->tdb_dst, sa1->tdb_sproto, &rval); 1233 if (sa1->tdb_spi == 0) { 1234 NET_UNLOCK(); 1235 goto ret; 1236 } 1237 1238 /* Send a message back telling what the SA (the SPI really) is */ 1239 freeme_sz = sizeof(struct sadb_sa); 1240 if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT | M_ZERO))) { 1241 rval = ENOMEM; 1242 NET_UNLOCK(); 1243 goto ret; 1244 } 1245 1246 headers[SADB_EXT_SPIRANGE] = NULL; 1247 headers[SADB_EXT_SA] = freeme; 1248 bckptr = freeme; 1249 1250 /* We really only care about the SPI, but we'll export the SA */ 1251 export_sa((void **) &bckptr, sa1); 1252 NET_UNLOCK(); 1253 break; 1254 1255 case SADB_UPDATE: 1256 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1257 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] + 1258 sizeof(struct sadb_address)); 1259 1260 /* Either all or none of the flow must be included */ 1261 if ((headers[SADB_X_EXT_SRC_FLOW] || 1262 headers[SADB_X_EXT_PROTOCOL] || 1263 headers[SADB_X_EXT_FLOW_TYPE] || 1264 headers[SADB_X_EXT_DST_FLOW] || 1265 headers[SADB_X_EXT_SRC_MASK] || 1266 headers[SADB_X_EXT_DST_MASK]) && 1267 !(headers[SADB_X_EXT_SRC_FLOW] && 1268 headers[SADB_X_EXT_PROTOCOL] && 1269 headers[SADB_X_EXT_FLOW_TYPE] && 1270 headers[SADB_X_EXT_DST_FLOW] && 1271 headers[SADB_X_EXT_SRC_MASK] && 1272 headers[SADB_X_EXT_DST_MASK])) { 1273 rval = EINVAL; 1274 goto ret; 1275 } 1276 #ifdef IPSEC 1277 /* UDP encap has to be enabled and is only supported for ESP */ 1278 if (headers[SADB_X_EXT_UDPENCAP] && 1279 (!udpencap_enable || 1280 smsg->sadb_msg_satype != SADB_SATYPE_ESP)) { 1281 rval = EINVAL; 1282 goto ret; 1283 } 1284 #endif /* IPSEC */ 1285 1286 /* Find TDB */ 1287 NET_LOCK(); 1288 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1289 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1290 1291 /* If there's no such SA, we're done */ 1292 if (sa2 == NULL) { 1293 rval = ESRCH; 1294 NET_UNLOCK(); 1295 goto ret; 1296 } 1297 1298 /* If this is a reserved SA */ 1299 if (sa2->tdb_flags & TDBF_INVALID) { 1300 struct tdb *newsa; 1301 struct ipsecinit ii; 1302 int alg; 1303 1304 /* Create new TDB */ 1305 freeme_sz = 0; 1306 freeme = tdb_alloc(rdomain); 1307 bzero(&ii, sizeof(struct ipsecinit)); 1308 1309 newsa = (struct tdb *) freeme; 1310 newsa->tdb_satype = smsg->sadb_msg_satype; 1311 1312 if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype, 1313 &newsa->tdb_sproto, &alg))) { 1314 tdb_free(freeme); 1315 freeme = NULL; 1316 NET_UNLOCK(); 1317 goto ret; 1318 } 1319 1320 /* Initialize SA */ 1321 import_sa(newsa, headers[SADB_EXT_SA], &ii); 1322 import_address(&newsa->tdb_src.sa, 1323 headers[SADB_EXT_ADDRESS_SRC]); 1324 import_address(&newsa->tdb_dst.sa, 1325 headers[SADB_EXT_ADDRESS_DST]); 1326 import_lifetime(newsa, 1327 headers[SADB_EXT_LIFETIME_CURRENT], 1328 PFKEYV2_LIFETIME_CURRENT); 1329 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT], 1330 PFKEYV2_LIFETIME_SOFT); 1331 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD], 1332 PFKEYV2_LIFETIME_HARD); 1333 import_key(&ii, headers[SADB_EXT_KEY_AUTH], 1334 PFKEYV2_AUTHENTICATION_KEY); 1335 import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT], 1336 PFKEYV2_ENCRYPTION_KEY); 1337 newsa->tdb_ids_swapped = 1; /* only on TDB_UPDATE */ 1338 import_identities(&newsa->tdb_ids, 1339 newsa->tdb_ids_swapped, 1340 headers[SADB_EXT_IDENTITY_SRC], 1341 headers[SADB_EXT_IDENTITY_DST]); 1342 if ((rval = import_flow(&newsa->tdb_filter, 1343 &newsa->tdb_filtermask, 1344 headers[SADB_X_EXT_SRC_FLOW], 1345 headers[SADB_X_EXT_SRC_MASK], 1346 headers[SADB_X_EXT_DST_FLOW], 1347 headers[SADB_X_EXT_DST_MASK], 1348 headers[SADB_X_EXT_PROTOCOL], 1349 headers[SADB_X_EXT_FLOW_TYPE]))) { 1350 tdb_free(freeme); 1351 freeme = NULL; 1352 NET_UNLOCK(); 1353 goto ret; 1354 } 1355 import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]); 1356 import_rdomain(newsa, headers[SADB_X_EXT_RDOMAIN]); 1357 #if NPF > 0 1358 import_tag(newsa, headers[SADB_X_EXT_TAG]); 1359 import_tap(newsa, headers[SADB_X_EXT_TAP]); 1360 #endif 1361 1362 /* Exclude sensitive data from reply message. */ 1363 headers[SADB_EXT_KEY_AUTH] = NULL; 1364 headers[SADB_EXT_KEY_ENCRYPT] = NULL; 1365 headers[SADB_X_EXT_LOCAL_AUTH] = NULL; 1366 headers[SADB_X_EXT_REMOTE_AUTH] = NULL; 1367 1368 newsa->tdb_seq = smsg->sadb_msg_seq; 1369 1370 rval = tdb_init(newsa, alg, &ii); 1371 if (rval) { 1372 rval = EINVAL; 1373 tdb_free(freeme); 1374 freeme = NULL; 1375 NET_UNLOCK(); 1376 goto ret; 1377 } 1378 1379 newsa->tdb_cur_allocations = sa2->tdb_cur_allocations; 1380 1381 /* Delete old version of the SA, insert new one */ 1382 tdb_delete(sa2); 1383 puttdb((struct tdb *) freeme); 1384 sa2 = freeme = NULL; 1385 } else { 1386 /* 1387 * The SA is already initialized, so we're only allowed to 1388 * change lifetimes and some other information; we're 1389 * not allowed to change keys, addresses or identities. 1390 */ 1391 if (headers[SADB_EXT_KEY_AUTH] || 1392 headers[SADB_EXT_KEY_ENCRYPT] || 1393 headers[SADB_EXT_IDENTITY_SRC] || 1394 headers[SADB_EXT_IDENTITY_DST] || 1395 headers[SADB_EXT_SENSITIVITY]) { 1396 rval = EINVAL; 1397 NET_UNLOCK(); 1398 goto ret; 1399 } 1400 1401 import_sa(sa2, headers[SADB_EXT_SA], NULL); 1402 import_lifetime(sa2, 1403 headers[SADB_EXT_LIFETIME_CURRENT], 1404 PFKEYV2_LIFETIME_CURRENT); 1405 import_lifetime(sa2, headers[SADB_EXT_LIFETIME_SOFT], 1406 PFKEYV2_LIFETIME_SOFT); 1407 import_lifetime(sa2, headers[SADB_EXT_LIFETIME_HARD], 1408 PFKEYV2_LIFETIME_HARD); 1409 import_udpencap(sa2, headers[SADB_X_EXT_UDPENCAP]); 1410 #if NPF > 0 1411 import_tag(sa2, headers[SADB_X_EXT_TAG]); 1412 import_tap(sa2, headers[SADB_X_EXT_TAP]); 1413 #endif 1414 if (headers[SADB_EXT_ADDRESS_SRC] || 1415 headers[SADB_EXT_ADDRESS_PROXY]) { 1416 tdb_unlink(sa2); 1417 import_address((struct sockaddr *)&sa2->tdb_src, 1418 headers[SADB_EXT_ADDRESS_SRC]); 1419 import_address((struct sockaddr *)&sa2->tdb_dst, 1420 headers[SADB_EXT_ADDRESS_PROXY]); 1421 puttdb(sa2); 1422 } 1423 } 1424 NET_UNLOCK(); 1425 1426 break; 1427 case SADB_ADD: 1428 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1429 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] + 1430 sizeof(struct sadb_address)); 1431 1432 /* Either all or none of the flow must be included */ 1433 if ((headers[SADB_X_EXT_SRC_FLOW] || 1434 headers[SADB_X_EXT_PROTOCOL] || 1435 headers[SADB_X_EXT_FLOW_TYPE] || 1436 headers[SADB_X_EXT_DST_FLOW] || 1437 headers[SADB_X_EXT_SRC_MASK] || 1438 headers[SADB_X_EXT_DST_MASK]) && 1439 !(headers[SADB_X_EXT_SRC_FLOW] && 1440 headers[SADB_X_EXT_PROTOCOL] && 1441 headers[SADB_X_EXT_FLOW_TYPE] && 1442 headers[SADB_X_EXT_DST_FLOW] && 1443 headers[SADB_X_EXT_SRC_MASK] && 1444 headers[SADB_X_EXT_DST_MASK])) { 1445 rval = EINVAL; 1446 goto ret; 1447 } 1448 #ifdef IPSEC 1449 /* UDP encap has to be enabled and is only supported for ESP */ 1450 if (headers[SADB_X_EXT_UDPENCAP] && 1451 (!udpencap_enable || 1452 smsg->sadb_msg_satype != SADB_SATYPE_ESP)) { 1453 rval = EINVAL; 1454 goto ret; 1455 } 1456 #endif /* IPSEC */ 1457 1458 NET_LOCK(); 1459 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1460 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1461 1462 /* We can't add an existing SA! */ 1463 if (sa2 != NULL) { 1464 rval = EEXIST; 1465 NET_UNLOCK(); 1466 goto ret; 1467 } 1468 1469 /* We can only add "mature" SAs */ 1470 if (ssa->sadb_sa_state != SADB_SASTATE_MATURE) { 1471 rval = EINVAL; 1472 NET_UNLOCK(); 1473 goto ret; 1474 } 1475 1476 /* Allocate and initialize new TDB */ 1477 freeme_sz = 0; 1478 freeme = tdb_alloc(rdomain); 1479 1480 { 1481 struct tdb *newsa = (struct tdb *) freeme; 1482 struct ipsecinit ii; 1483 int alg; 1484 1485 bzero(&ii, sizeof(struct ipsecinit)); 1486 1487 newsa->tdb_satype = smsg->sadb_msg_satype; 1488 if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype, 1489 &newsa->tdb_sproto, &alg))) { 1490 tdb_free(freeme); 1491 freeme = NULL; 1492 NET_UNLOCK(); 1493 goto ret; 1494 } 1495 1496 import_sa(newsa, headers[SADB_EXT_SA], &ii); 1497 import_address(&newsa->tdb_src.sa, 1498 headers[SADB_EXT_ADDRESS_SRC]); 1499 import_address(&newsa->tdb_dst.sa, 1500 headers[SADB_EXT_ADDRESS_DST]); 1501 1502 import_lifetime(newsa, 1503 headers[SADB_EXT_LIFETIME_CURRENT], 1504 PFKEYV2_LIFETIME_CURRENT); 1505 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT], 1506 PFKEYV2_LIFETIME_SOFT); 1507 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD], 1508 PFKEYV2_LIFETIME_HARD); 1509 1510 import_key(&ii, headers[SADB_EXT_KEY_AUTH], 1511 PFKEYV2_AUTHENTICATION_KEY); 1512 import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT], 1513 PFKEYV2_ENCRYPTION_KEY); 1514 1515 import_identities(&newsa->tdb_ids, 1516 newsa->tdb_ids_swapped, 1517 headers[SADB_EXT_IDENTITY_SRC], 1518 headers[SADB_EXT_IDENTITY_DST]); 1519 1520 if ((rval = import_flow(&newsa->tdb_filter, 1521 &newsa->tdb_filtermask, 1522 headers[SADB_X_EXT_SRC_FLOW], 1523 headers[SADB_X_EXT_SRC_MASK], 1524 headers[SADB_X_EXT_DST_FLOW], 1525 headers[SADB_X_EXT_DST_MASK], 1526 headers[SADB_X_EXT_PROTOCOL], 1527 headers[SADB_X_EXT_FLOW_TYPE]))) { 1528 tdb_free(freeme); 1529 freeme = NULL; 1530 NET_UNLOCK(); 1531 goto ret; 1532 } 1533 import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]); 1534 import_rdomain(newsa, headers[SADB_X_EXT_RDOMAIN]); 1535 #if NPF > 0 1536 import_tag(newsa, headers[SADB_X_EXT_TAG]); 1537 import_tap(newsa, headers[SADB_X_EXT_TAP]); 1538 #endif 1539 1540 /* Exclude sensitive data from reply message. */ 1541 headers[SADB_EXT_KEY_AUTH] = NULL; 1542 headers[SADB_EXT_KEY_ENCRYPT] = NULL; 1543 headers[SADB_X_EXT_LOCAL_AUTH] = NULL; 1544 headers[SADB_X_EXT_REMOTE_AUTH] = NULL; 1545 1546 newsa->tdb_seq = smsg->sadb_msg_seq; 1547 1548 rval = tdb_init(newsa, alg, &ii); 1549 if (rval) { 1550 rval = EINVAL; 1551 tdb_free(freeme); 1552 freeme = NULL; 1553 NET_UNLOCK(); 1554 goto ret; 1555 } 1556 } 1557 1558 /* Add TDB in table */ 1559 puttdb((struct tdb *) freeme); 1560 NET_UNLOCK(); 1561 1562 freeme = NULL; 1563 break; 1564 1565 case SADB_DELETE: 1566 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1567 sunionp = 1568 (union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] + 1569 sizeof(struct sadb_address)); 1570 1571 NET_LOCK(); 1572 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1573 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1574 if (sa2 == NULL) { 1575 rval = ESRCH; 1576 NET_UNLOCK(); 1577 goto ret; 1578 } 1579 1580 tdb_delete(sa2); 1581 NET_UNLOCK(); 1582 1583 sa2 = NULL; 1584 break; 1585 1586 case SADB_X_ASKPOLICY: 1587 /* Get the relevant policy */ 1588 NET_LOCK(); 1589 ipa = ipsec_get_acquire(((struct sadb_x_policy *) headers[SADB_X_EXT_POLICY])->sadb_x_policy_seq); 1590 if (ipa == NULL) { 1591 rval = ESRCH; 1592 NET_UNLOCK(); 1593 goto ret; 1594 } 1595 1596 rval = pfkeyv2_policy(ipa, headers, &freeme, &freeme_sz); 1597 NET_UNLOCK(); 1598 if (rval) 1599 mode = PFKEYV2_SENDMESSAGE_UNICAST; 1600 1601 break; 1602 1603 case SADB_GET: 1604 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1605 sunionp = 1606 (union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] + 1607 sizeof(struct sadb_address)); 1608 1609 NET_LOCK(); 1610 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1611 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1612 if (sa2 == NULL) { 1613 rval = ESRCH; 1614 NET_UNLOCK(); 1615 goto ret; 1616 } 1617 1618 rval = pfkeyv2_get(sa2, headers, &freeme, &freeme_sz, NULL); 1619 NET_UNLOCK(); 1620 if (rval) 1621 mode = PFKEYV2_SENDMESSAGE_UNICAST; 1622 1623 break; 1624 1625 case SADB_REGISTER: 1626 s = keylock(kp); 1627 if (!(kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED)) { 1628 kp->kcb_flags |= PFKEYV2_SOCKETFLAGS_REGISTERED; 1629 mtx_enter(&pfkeyv2_mtx); 1630 nregistered++; 1631 mtx_leave(&pfkeyv2_mtx); 1632 } 1633 keyunlock(kp, s); 1634 1635 freeme_sz = sizeof(struct sadb_supported) + sizeof(ealgs); 1636 if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT | M_ZERO))) { 1637 rval = ENOMEM; 1638 goto ret; 1639 } 1640 1641 ssup = (struct sadb_supported *) freeme; 1642 ssup->sadb_supported_len = freeme_sz / sizeof(uint64_t); 1643 1644 { 1645 void *p = freeme + sizeof(struct sadb_supported); 1646 1647 bcopy(&ealgs[0], p, sizeof(ealgs)); 1648 } 1649 1650 headers[SADB_EXT_SUPPORTED_ENCRYPT] = freeme; 1651 1652 freeme2_sz = sizeof(struct sadb_supported) + sizeof(aalgs); 1653 if (!(freeme2 = malloc(freeme2_sz, M_PFKEY, 1654 M_NOWAIT | M_ZERO))) { 1655 rval = ENOMEM; 1656 goto ret; 1657 } 1658 1659 /* Keep track what this socket has registered for */ 1660 s = keylock(kp); 1661 kp->kcb_reg |= 1662 (1 << ((struct sadb_msg *)message)->sadb_msg_satype); 1663 keyunlock(kp, s); 1664 1665 ssup = (struct sadb_supported *) freeme2; 1666 ssup->sadb_supported_len = freeme2_sz / sizeof(uint64_t); 1667 1668 { 1669 void *p = freeme2 + sizeof(struct sadb_supported); 1670 1671 bcopy(&aalgs[0], p, sizeof(aalgs)); 1672 } 1673 1674 headers[SADB_EXT_SUPPORTED_AUTH] = freeme2; 1675 1676 freeme3_sz = sizeof(struct sadb_supported) + sizeof(calgs); 1677 if (!(freeme3 = malloc(freeme3_sz, M_PFKEY, 1678 M_NOWAIT | M_ZERO))) { 1679 rval = ENOMEM; 1680 goto ret; 1681 } 1682 1683 ssup = (struct sadb_supported *) freeme3; 1684 ssup->sadb_supported_len = freeme3_sz / sizeof(uint64_t); 1685 1686 { 1687 void *p = freeme3 + sizeof(struct sadb_supported); 1688 1689 bcopy(&calgs[0], p, sizeof(calgs)); 1690 } 1691 1692 headers[SADB_X_EXT_SUPPORTED_COMP] = freeme3; 1693 1694 break; 1695 1696 case SADB_ACQUIRE: 1697 case SADB_EXPIRE: 1698 /* Nothing to handle */ 1699 rval = 0; 1700 break; 1701 1702 case SADB_FLUSH: 1703 rval = 0; 1704 1705 NET_LOCK(); 1706 switch (smsg->sadb_msg_satype) { 1707 case SADB_SATYPE_UNSPEC: 1708 spd_table_walk(rdomain, pfkeyv2_policy_flush, NULL); 1709 /* FALLTHROUGH */ 1710 case SADB_SATYPE_AH: 1711 case SADB_SATYPE_ESP: 1712 case SADB_X_SATYPE_IPIP: 1713 case SADB_X_SATYPE_IPCOMP: 1714 #ifdef TCP_SIGNATURE 1715 case SADB_X_SATYPE_TCPSIGNATURE: 1716 #endif /* TCP_SIGNATURE */ 1717 tdb_walk(rdomain, pfkeyv2_sa_flush, 1718 (u_int8_t *) &(smsg->sadb_msg_satype)); 1719 1720 break; 1721 1722 default: 1723 rval = EINVAL; /* Unknown/unsupported type */ 1724 } 1725 NET_UNLOCK(); 1726 1727 break; 1728 1729 case SADB_DUMP: 1730 { 1731 struct dump_state dump_state; 1732 dump_state.sadb_msg = (struct sadb_msg *) headers[0]; 1733 dump_state.socket = so; 1734 1735 NET_LOCK(); 1736 rval = tdb_walk(rdomain, pfkeyv2_dump_walker, &dump_state); 1737 NET_UNLOCK(); 1738 if (!rval) 1739 goto realret; 1740 if ((rval == ENOMEM) || (rval == ENOBUFS)) 1741 rval = 0; 1742 } 1743 break; 1744 1745 case SADB_X_GRPSPIS: 1746 { 1747 struct tdb *tdb1, *tdb2, *tdb3; 1748 struct sadb_protocol *sa_proto; 1749 1750 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1751 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] + 1752 sizeof(struct sadb_address)); 1753 1754 NET_LOCK(); 1755 tdb1 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1756 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1757 if (tdb1 == NULL) { 1758 rval = ESRCH; 1759 NET_UNLOCK(); 1760 goto ret; 1761 } 1762 1763 ssa = (struct sadb_sa *) headers[SADB_X_EXT_SA2]; 1764 sunionp = (union sockaddr_union *) (headers[SADB_X_EXT_DST2] + 1765 sizeof(struct sadb_address)); 1766 sa_proto = (struct sadb_protocol *) headers[SADB_X_EXT_SATYPE2]; 1767 1768 /* optionally fetch tdb2 from rdomain2 */ 1769 tdb2 = gettdb(srdomain ? srdomain->sadb_x_rdomain_dom2 : rdomain, 1770 ssa->sadb_sa_spi, sunionp, 1771 SADB_X_GETSPROTO(sa_proto->sadb_protocol_proto)); 1772 if (tdb2 == NULL) { 1773 rval = ESRCH; 1774 NET_UNLOCK(); 1775 goto ret; 1776 } 1777 1778 /* Detect cycles */ 1779 for (tdb3 = tdb2; tdb3; tdb3 = tdb3->tdb_onext) 1780 if (tdb3 == tdb1) { 1781 rval = ESRCH; 1782 NET_UNLOCK(); 1783 goto ret; 1784 } 1785 1786 /* Maintenance */ 1787 if ((tdb1->tdb_onext) && 1788 (tdb1->tdb_onext->tdb_inext == tdb1)) 1789 tdb1->tdb_onext->tdb_inext = NULL; 1790 1791 if ((tdb2->tdb_inext) && 1792 (tdb2->tdb_inext->tdb_onext == tdb2)) 1793 tdb2->tdb_inext->tdb_onext = NULL; 1794 1795 /* Link them */ 1796 tdb1->tdb_onext = tdb2; 1797 tdb2->tdb_inext = tdb1; 1798 NET_UNLOCK(); 1799 } 1800 break; 1801 1802 case SADB_X_DELFLOW: 1803 delflag = 1; 1804 /*FALLTHROUGH*/ 1805 case SADB_X_ADDFLOW: 1806 { 1807 struct sadb_protocol *sab; 1808 union sockaddr_union *ssrc; 1809 int exists = 0; 1810 1811 NET_LOCK(); 1812 if ((rnh = spd_table_add(rdomain)) == NULL) { 1813 rval = ENOMEM; 1814 NET_UNLOCK(); 1815 goto ret; 1816 } 1817 1818 sab = (struct sadb_protocol *) headers[SADB_X_EXT_FLOW_TYPE]; 1819 1820 if ((sab->sadb_protocol_direction != IPSP_DIRECTION_IN) && 1821 (sab->sadb_protocol_direction != IPSP_DIRECTION_OUT)) { 1822 rval = EINVAL; 1823 NET_UNLOCK(); 1824 goto ret; 1825 } 1826 1827 /* If the security protocol wasn't specified, pretend it was ESP */ 1828 if (smsg->sadb_msg_satype == 0) 1829 smsg->sadb_msg_satype = SADB_SATYPE_ESP; 1830 1831 if (headers[SADB_EXT_ADDRESS_DST]) 1832 sunionp = (union sockaddr_union *) 1833 (headers[SADB_EXT_ADDRESS_DST] + 1834 sizeof(struct sadb_address)); 1835 else 1836 sunionp = NULL; 1837 1838 if (headers[SADB_EXT_ADDRESS_SRC]) 1839 ssrc = (union sockaddr_union *) 1840 (headers[SADB_EXT_ADDRESS_SRC] + 1841 sizeof(struct sadb_address)); 1842 else 1843 ssrc = NULL; 1844 1845 if ((rval = import_flow(&encapdst, &encapnetmask, 1846 headers[SADB_X_EXT_SRC_FLOW], headers[SADB_X_EXT_SRC_MASK], 1847 headers[SADB_X_EXT_DST_FLOW], headers[SADB_X_EXT_DST_MASK], 1848 headers[SADB_X_EXT_PROTOCOL], 1849 headers[SADB_X_EXT_FLOW_TYPE]))) { 1850 NET_UNLOCK(); 1851 goto ret; 1852 } 1853 1854 /* Determine whether the exact same SPD entry already exists. */ 1855 if ((rn = rn_match(&encapdst, rnh)) != NULL) { 1856 ipo = (struct ipsec_policy *)rn; 1857 1858 /* Verify that the entry is identical */ 1859 if (bcmp(&ipo->ipo_addr, &encapdst, 1860 sizeof(struct sockaddr_encap)) || 1861 bcmp(&ipo->ipo_mask, &encapnetmask, 1862 sizeof(struct sockaddr_encap))) 1863 ipo = NULL; /* Fall through */ 1864 else 1865 exists = 1; 1866 } else 1867 ipo = NULL; 1868 1869 /* 1870 * If the existing policy is static, only delete or update 1871 * it if the new one is also static. 1872 */ 1873 if (exists && (ipo->ipo_flags & IPSP_POLICY_STATIC)) { 1874 if (!(sab->sadb_protocol_flags & 1875 SADB_X_POLICYFLAGS_POLICY)) { 1876 NET_UNLOCK(); 1877 goto ret; 1878 } 1879 } 1880 1881 /* Delete ? */ 1882 if (delflag) { 1883 if (exists) { 1884 rval = ipsec_delete_policy(ipo); 1885 NET_UNLOCK(); 1886 goto ret; 1887 } 1888 1889 /* If we were asked to delete something non-existent, error. */ 1890 rval = ESRCH; 1891 NET_UNLOCK(); 1892 break; 1893 } 1894 1895 if (!exists) { 1896 if (ipsec_policy_pool_initialized == 0) { 1897 ipsec_policy_pool_initialized = 1; 1898 pool_init(&ipsec_policy_pool, 1899 sizeof(struct ipsec_policy), 0, 1900 IPL_NONE, 0, "ipsec policy", NULL); 1901 } 1902 1903 /* Allocate policy entry */ 1904 ipo = pool_get(&ipsec_policy_pool, PR_NOWAIT|PR_ZERO); 1905 if (ipo == NULL) { 1906 rval = ENOMEM; 1907 NET_UNLOCK(); 1908 goto ret; 1909 } 1910 } 1911 1912 switch (sab->sadb_protocol_proto) { 1913 case SADB_X_FLOW_TYPE_USE: 1914 ipo->ipo_type = IPSP_IPSEC_USE; 1915 break; 1916 1917 case SADB_X_FLOW_TYPE_ACQUIRE: 1918 ipo->ipo_type = IPSP_IPSEC_ACQUIRE; 1919 break; 1920 1921 case SADB_X_FLOW_TYPE_REQUIRE: 1922 ipo->ipo_type = IPSP_IPSEC_REQUIRE; 1923 break; 1924 1925 case SADB_X_FLOW_TYPE_DENY: 1926 ipo->ipo_type = IPSP_DENY; 1927 break; 1928 1929 case SADB_X_FLOW_TYPE_BYPASS: 1930 ipo->ipo_type = IPSP_PERMIT; 1931 break; 1932 1933 case SADB_X_FLOW_TYPE_DONTACQ: 1934 ipo->ipo_type = IPSP_IPSEC_DONTACQ; 1935 break; 1936 1937 default: 1938 if (!exists) 1939 pool_put(&ipsec_policy_pool, ipo); 1940 else 1941 ipsec_delete_policy(ipo); 1942 1943 rval = EINVAL; 1944 NET_UNLOCK(); 1945 goto ret; 1946 } 1947 1948 if (sab->sadb_protocol_flags & SADB_X_POLICYFLAGS_POLICY) 1949 ipo->ipo_flags |= IPSP_POLICY_STATIC; 1950 1951 if (sunionp) 1952 bcopy(sunionp, &ipo->ipo_dst, 1953 sizeof(union sockaddr_union)); 1954 else 1955 bzero(&ipo->ipo_dst, sizeof(union sockaddr_union)); 1956 1957 if (ssrc) 1958 bcopy(ssrc, &ipo->ipo_src, 1959 sizeof(union sockaddr_union)); 1960 else 1961 bzero(&ipo->ipo_src, sizeof(union sockaddr_union)); 1962 1963 ipo->ipo_sproto = SADB_X_GETSPROTO(smsg->sadb_msg_satype); 1964 1965 if (ipo->ipo_ids) { 1966 ipsp_ids_free(ipo->ipo_ids); 1967 ipo->ipo_ids = NULL; 1968 } 1969 1970 if ((sid = headers[SADB_EXT_IDENTITY_SRC]) != NULL && 1971 (did = headers[SADB_EXT_IDENTITY_DST]) != NULL) { 1972 import_identities(&ipo->ipo_ids, 0, sid, did); 1973 if (ipo->ipo_ids == NULL) { 1974 if (exists) 1975 ipsec_delete_policy(ipo); 1976 else 1977 pool_put(&ipsec_policy_pool, ipo); 1978 rval = ENOBUFS; 1979 NET_UNLOCK(); 1980 goto ret; 1981 } 1982 } 1983 1984 /* Flow type */ 1985 if (!exists) { 1986 /* Initialize policy entry */ 1987 bcopy(&encapdst, &ipo->ipo_addr, 1988 sizeof(struct sockaddr_encap)); 1989 bcopy(&encapnetmask, &ipo->ipo_mask, 1990 sizeof(struct sockaddr_encap)); 1991 1992 TAILQ_INIT(&ipo->ipo_acquires); 1993 ipo->ipo_rdomain = rdomain; 1994 ipo->ipo_ref_count = 1; 1995 1996 /* Add SPD entry */ 1997 if ((rnh = spd_table_get(rdomain)) == NULL || 1998 (rn = rn_addroute((caddr_t)&ipo->ipo_addr, 1999 (caddr_t)&ipo->ipo_mask, rnh, 2000 ipo->ipo_nodes, 0)) == NULL) { 2001 /* Remove from linked list of policies on TDB */ 2002 if (ipo->ipo_tdb) 2003 TAILQ_REMOVE(&ipo->ipo_tdb->tdb_policy_head, 2004 ipo, ipo_tdb_next); 2005 2006 if (ipo->ipo_ids) 2007 ipsp_ids_free(ipo->ipo_ids); 2008 pool_put(&ipsec_policy_pool, ipo); 2009 NET_UNLOCK(); 2010 goto ret; 2011 } 2012 TAILQ_INSERT_HEAD(&ipsec_policy_head, ipo, ipo_list); 2013 ipsec_in_use++; 2014 /* 2015 * XXXSMP IPsec data structures are not ready to be 2016 * accessed by multiple Network threads in parallel, 2017 * so force all packets to be processed by the first 2018 * one. 2019 */ 2020 extern int nettaskqs; 2021 nettaskqs = 1; 2022 } else { 2023 ipo->ipo_last_searched = ipo->ipo_flags = 0; 2024 } 2025 NET_UNLOCK(); 2026 } 2027 break; 2028 2029 case SADB_X_PROMISC: 2030 if (len >= 2 * sizeof(struct sadb_msg)) { 2031 struct mbuf *packet; 2032 2033 if ((rval = pfdatatopacket(message, len, &packet)) != 0) 2034 goto ret; 2035 2036 SRPL_FOREACH(bkp, &sr, &pkptable.pkp_list, kcb_list) { 2037 if (bkp == kp || bkp->kcb_rdomain != kp->kcb_rdomain) 2038 continue; 2039 2040 if (!smsg->sadb_msg_seq || 2041 (smsg->sadb_msg_seq == kp->kcb_pid)) { 2042 s = keylock(bkp); 2043 pfkey_sendup(bkp, packet, 1); 2044 keyunlock(bkp, s); 2045 } 2046 } 2047 SRPL_LEAVE(&sr); 2048 2049 m_freem(packet); 2050 } else { 2051 if (len != sizeof(struct sadb_msg)) { 2052 rval = EINVAL; 2053 goto ret; 2054 } 2055 2056 s = keylock(kp); 2057 i = (kp->kcb_flags & 2058 PFKEYV2_SOCKETFLAGS_PROMISC) ? 1 : 0; 2059 j = smsg->sadb_msg_satype ? 1 : 0; 2060 2061 if (i ^ j) { 2062 if (j) { 2063 kp->kcb_flags |= 2064 PFKEYV2_SOCKETFLAGS_PROMISC; 2065 mtx_enter(&pfkeyv2_mtx); 2066 npromisc++; 2067 mtx_leave(&pfkeyv2_mtx); 2068 } else { 2069 kp->kcb_flags &= 2070 ~PFKEYV2_SOCKETFLAGS_PROMISC; 2071 mtx_enter(&pfkeyv2_mtx); 2072 npromisc--; 2073 mtx_leave(&pfkeyv2_mtx); 2074 } 2075 } 2076 keyunlock(kp, s); 2077 } 2078 2079 break; 2080 2081 default: 2082 rval = EINVAL; 2083 goto ret; 2084 } 2085 2086 ret: 2087 if (rval) { 2088 if ((rval == EINVAL) || (rval == ENOMEM) || (rval == ENOBUFS)) 2089 goto realret; 2090 2091 for (i = 1; i <= SADB_EXT_MAX; i++) 2092 headers[i] = NULL; 2093 2094 smsg->sadb_msg_errno = abs(rval); 2095 } else { 2096 uint64_t seen = 0LL; 2097 2098 for (i = 1; i <= SADB_EXT_MAX; i++) 2099 if (headers[i]) 2100 seen |= (1LL << i); 2101 2102 if ((seen & sadb_exts_allowed_out[smsg->sadb_msg_type]) 2103 != seen) { 2104 rval = EPERM; 2105 goto realret; 2106 } 2107 2108 if ((seen & sadb_exts_required_out[smsg->sadb_msg_type]) != 2109 sadb_exts_required_out[smsg->sadb_msg_type]) { 2110 rval = EPERM; 2111 goto realret; 2112 } 2113 } 2114 2115 rval = pfkeyv2_sendmessage(headers, mode, so, 0, 0, kp->kcb_rdomain); 2116 2117 realret: 2118 2119 if (freeme != NULL) 2120 explicit_bzero(freeme, freeme_sz); 2121 free(freeme, M_PFKEY, freeme_sz); 2122 free(freeme2, M_PFKEY, freeme2_sz); 2123 free(freeme3, M_PFKEY, freeme3_sz); 2124 2125 explicit_bzero(message, len); 2126 free(message, M_PFKEY, len); 2127 2128 free(sa1, M_PFKEY, sizeof(*sa1)); 2129 2130 return (rval); 2131 } 2132 2133 /* 2134 * Send an ACQUIRE message to key management, to get a new SA. 2135 */ 2136 int 2137 pfkeyv2_acquire(struct ipsec_policy *ipo, union sockaddr_union *gw, 2138 union sockaddr_union *laddr, u_int32_t *seq, struct sockaddr_encap *ddst) 2139 { 2140 void *p, *headers[SADB_EXT_MAX + 1], *buffer = NULL; 2141 struct sadb_comb *sadb_comb; 2142 struct sadb_address *sadd; 2143 struct sadb_prop *sa_prop; 2144 struct sadb_msg *smsg; 2145 int rval = 0; 2146 int i, j, registered; 2147 2148 mtx_enter(&pfkeyv2_mtx); 2149 *seq = pfkeyv2_seq++; 2150 2151 registered = nregistered; 2152 mtx_leave(&pfkeyv2_mtx); 2153 2154 if (!registered) { 2155 rval = ESRCH; 2156 goto ret; 2157 } 2158 2159 /* How large a buffer do we need... XXX we only do one proposal for now */ 2160 i = sizeof(struct sadb_msg) + 2161 (laddr == NULL ? 0 : sizeof(struct sadb_address) + 2162 PADUP(ipo->ipo_src.sa.sa_len)) + 2163 sizeof(struct sadb_address) + PADUP(gw->sa.sa_len) + 2164 sizeof(struct sadb_prop) + 1 * sizeof(struct sadb_comb); 2165 2166 if (ipo->ipo_ids) { 2167 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_local->len); 2168 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_remote->len); 2169 } 2170 2171 /* Allocate */ 2172 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 2173 rval = ENOMEM; 2174 goto ret; 2175 } 2176 2177 bzero(headers, sizeof(headers)); 2178 2179 buffer = p; 2180 2181 headers[0] = p; 2182 p += sizeof(struct sadb_msg); 2183 2184 smsg = (struct sadb_msg *) headers[0]; 2185 smsg->sadb_msg_version = PF_KEY_V2; 2186 smsg->sadb_msg_type = SADB_ACQUIRE; 2187 smsg->sadb_msg_len = i / sizeof(uint64_t); 2188 smsg->sadb_msg_seq = *seq; 2189 2190 if (ipo->ipo_sproto == IPPROTO_ESP) 2191 smsg->sadb_msg_satype = SADB_SATYPE_ESP; 2192 else if (ipo->ipo_sproto == IPPROTO_AH) 2193 smsg->sadb_msg_satype = SADB_SATYPE_AH; 2194 else if (ipo->ipo_sproto == IPPROTO_IPCOMP) 2195 smsg->sadb_msg_satype = SADB_X_SATYPE_IPCOMP; 2196 2197 if (laddr) { 2198 headers[SADB_EXT_ADDRESS_SRC] = p; 2199 p += sizeof(struct sadb_address) + PADUP(laddr->sa.sa_len); 2200 sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_SRC]; 2201 sadd->sadb_address_len = (sizeof(struct sadb_address) + 2202 laddr->sa.sa_len + sizeof(uint64_t) - 1) / 2203 sizeof(uint64_t); 2204 bcopy(laddr, headers[SADB_EXT_ADDRESS_SRC] + 2205 sizeof(struct sadb_address), laddr->sa.sa_len); 2206 } 2207 2208 headers[SADB_EXT_ADDRESS_DST] = p; 2209 p += sizeof(struct sadb_address) + PADUP(gw->sa.sa_len); 2210 sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_DST]; 2211 sadd->sadb_address_len = (sizeof(struct sadb_address) + 2212 gw->sa.sa_len + sizeof(uint64_t) - 1) / sizeof(uint64_t); 2213 bcopy(gw, headers[SADB_EXT_ADDRESS_DST] + sizeof(struct sadb_address), 2214 gw->sa.sa_len); 2215 2216 if (ipo->ipo_ids) 2217 export_identities(&p, ipo->ipo_ids, 0, headers); 2218 2219 headers[SADB_EXT_PROPOSAL] = p; 2220 p += sizeof(struct sadb_prop); 2221 sa_prop = (struct sadb_prop *) headers[SADB_EXT_PROPOSAL]; 2222 sa_prop->sadb_prop_num = 1; /* XXX One proposal only */ 2223 sa_prop->sadb_prop_len = (sizeof(struct sadb_prop) + 2224 (sizeof(struct sadb_comb) * sa_prop->sadb_prop_num)) / 2225 sizeof(uint64_t); 2226 2227 sadb_comb = p; 2228 2229 /* XXX Should actually ask the crypto layer what's supported */ 2230 for (j = 0; j < sa_prop->sadb_prop_num; j++) { 2231 sadb_comb->sadb_comb_flags = 0; 2232 #ifdef IPSEC 2233 if (ipsec_require_pfs) 2234 sadb_comb->sadb_comb_flags |= SADB_SAFLAGS_PFS; 2235 2236 /* Set the encryption algorithm */ 2237 if (ipo->ipo_sproto == IPPROTO_ESP) { 2238 if (!strncasecmp(ipsec_def_enc, "aes", 2239 sizeof("aes"))) { 2240 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AES; 2241 sadb_comb->sadb_comb_encrypt_minbits = 128; 2242 sadb_comb->sadb_comb_encrypt_maxbits = 256; 2243 } else if (!strncasecmp(ipsec_def_enc, "aesctr", 2244 sizeof("aesctr"))) { 2245 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AESCTR; 2246 sadb_comb->sadb_comb_encrypt_minbits = 128+32; 2247 sadb_comb->sadb_comb_encrypt_maxbits = 256+32; 2248 } else if (!strncasecmp(ipsec_def_enc, "3des", 2249 sizeof("3des"))) { 2250 sadb_comb->sadb_comb_encrypt = SADB_EALG_3DESCBC; 2251 sadb_comb->sadb_comb_encrypt_minbits = 192; 2252 sadb_comb->sadb_comb_encrypt_maxbits = 192; 2253 } else if (!strncasecmp(ipsec_def_enc, "blowfish", 2254 sizeof("blowfish"))) { 2255 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_BLF; 2256 sadb_comb->sadb_comb_encrypt_minbits = 40; 2257 sadb_comb->sadb_comb_encrypt_maxbits = BLF_MAXKEYLEN * 8; 2258 } else if (!strncasecmp(ipsec_def_enc, "cast128", 2259 sizeof("cast128"))) { 2260 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_CAST; 2261 sadb_comb->sadb_comb_encrypt_minbits = 40; 2262 sadb_comb->sadb_comb_encrypt_maxbits = 128; 2263 } 2264 } else if (ipo->ipo_sproto == IPPROTO_IPCOMP) { 2265 /* Set the compression algorithm */ 2266 if (!strncasecmp(ipsec_def_comp, "deflate", 2267 sizeof("deflate"))) { 2268 sadb_comb->sadb_comb_encrypt = SADB_X_CALG_DEFLATE; 2269 sadb_comb->sadb_comb_encrypt_minbits = 0; 2270 sadb_comb->sadb_comb_encrypt_maxbits = 0; 2271 } else if (!strncasecmp(ipsec_def_comp, "lzs", 2272 sizeof("lzs"))) { 2273 sadb_comb->sadb_comb_encrypt = SADB_X_CALG_LZS; 2274 sadb_comb->sadb_comb_encrypt_minbits = 0; 2275 sadb_comb->sadb_comb_encrypt_maxbits = 0; 2276 } 2277 } 2278 2279 /* Set the authentication algorithm */ 2280 if (!strncasecmp(ipsec_def_auth, "hmac-sha1", 2281 sizeof("hmac-sha1"))) { 2282 sadb_comb->sadb_comb_auth = SADB_AALG_SHA1HMAC; 2283 sadb_comb->sadb_comb_auth_minbits = 160; 2284 sadb_comb->sadb_comb_auth_maxbits = 160; 2285 } else if (!strncasecmp(ipsec_def_auth, "hmac-ripemd160", 2286 sizeof("hmac_ripemd160"))) { 2287 sadb_comb->sadb_comb_auth = SADB_X_AALG_RIPEMD160HMAC; 2288 sadb_comb->sadb_comb_auth_minbits = 160; 2289 sadb_comb->sadb_comb_auth_maxbits = 160; 2290 } else if (!strncasecmp(ipsec_def_auth, "hmac-md5", 2291 sizeof("hmac-md5"))) { 2292 sadb_comb->sadb_comb_auth = SADB_AALG_MD5HMAC; 2293 sadb_comb->sadb_comb_auth_minbits = 128; 2294 sadb_comb->sadb_comb_auth_maxbits = 128; 2295 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-256", 2296 sizeof("hmac-sha2-256"))) { 2297 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_256; 2298 sadb_comb->sadb_comb_auth_minbits = 256; 2299 sadb_comb->sadb_comb_auth_maxbits = 256; 2300 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-384", 2301 sizeof("hmac-sha2-384"))) { 2302 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_384; 2303 sadb_comb->sadb_comb_auth_minbits = 384; 2304 sadb_comb->sadb_comb_auth_maxbits = 384; 2305 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-512", 2306 sizeof("hmac-sha2-512"))) { 2307 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_512; 2308 sadb_comb->sadb_comb_auth_minbits = 512; 2309 sadb_comb->sadb_comb_auth_maxbits = 512; 2310 } 2311 2312 sadb_comb->sadb_comb_soft_allocations = ipsec_soft_allocations; 2313 sadb_comb->sadb_comb_hard_allocations = ipsec_exp_allocations; 2314 2315 sadb_comb->sadb_comb_soft_bytes = ipsec_soft_bytes; 2316 sadb_comb->sadb_comb_hard_bytes = ipsec_exp_bytes; 2317 2318 sadb_comb->sadb_comb_soft_addtime = ipsec_soft_timeout; 2319 sadb_comb->sadb_comb_hard_addtime = ipsec_exp_timeout; 2320 2321 sadb_comb->sadb_comb_soft_usetime = ipsec_soft_first_use; 2322 sadb_comb->sadb_comb_hard_usetime = ipsec_exp_first_use; 2323 #endif 2324 sadb_comb++; 2325 } 2326 2327 /* Send the ACQUIRE message to all compliant registered listeners. */ 2328 if ((rval = pfkeyv2_sendmessage(headers, 2329 PFKEYV2_SENDMESSAGE_REGISTERED, NULL, smsg->sadb_msg_satype, 0, 2330 ipo->ipo_rdomain)) != 0) 2331 goto ret; 2332 2333 rval = 0; 2334 ret: 2335 if (buffer != NULL) { 2336 explicit_bzero(buffer, i); 2337 free(buffer, M_PFKEY, i); 2338 } 2339 2340 return (rval); 2341 } 2342 2343 /* 2344 * Notify key management that an expiration went off. The second argument 2345 * specifies the type of expiration (soft or hard). 2346 */ 2347 int 2348 pfkeyv2_expire(struct tdb *tdb, u_int16_t type) 2349 { 2350 void *p, *headers[SADB_EXT_MAX+1], *buffer = NULL; 2351 struct sadb_msg *smsg; 2352 int rval = 0; 2353 int i; 2354 2355 switch (tdb->tdb_sproto) { 2356 case IPPROTO_AH: 2357 case IPPROTO_ESP: 2358 case IPPROTO_IPIP: 2359 case IPPROTO_IPCOMP: 2360 #ifdef TCP_SIGNATURE 2361 case IPPROTO_TCP: 2362 #endif /* TCP_SIGNATURE */ 2363 break; 2364 2365 default: 2366 rval = EOPNOTSUPP; 2367 goto ret; 2368 } 2369 2370 i = sizeof(struct sadb_msg) + sizeof(struct sadb_sa) + 2371 2 * sizeof(struct sadb_lifetime) + 2372 sizeof(struct sadb_address) + PADUP(tdb->tdb_src.sa.sa_len) + 2373 sizeof(struct sadb_address) + PADUP(tdb->tdb_dst.sa.sa_len); 2374 2375 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 2376 rval = ENOMEM; 2377 goto ret; 2378 } 2379 2380 bzero(headers, sizeof(headers)); 2381 2382 buffer = p; 2383 2384 headers[0] = p; 2385 p += sizeof(struct sadb_msg); 2386 2387 smsg = (struct sadb_msg *) headers[0]; 2388 smsg->sadb_msg_version = PF_KEY_V2; 2389 smsg->sadb_msg_type = SADB_EXPIRE; 2390 smsg->sadb_msg_satype = tdb->tdb_satype; 2391 smsg->sadb_msg_len = i / sizeof(uint64_t); 2392 2393 mtx_enter(&pfkeyv2_mtx); 2394 smsg->sadb_msg_seq = pfkeyv2_seq++; 2395 mtx_leave(&pfkeyv2_mtx); 2396 2397 headers[SADB_EXT_SA] = p; 2398 export_sa(&p, tdb); 2399 2400 headers[SADB_EXT_LIFETIME_CURRENT] = p; 2401 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_CURRENT); 2402 2403 headers[type] = p; 2404 export_lifetime(&p, tdb, type == SADB_EXT_LIFETIME_SOFT ? 2405 PFKEYV2_LIFETIME_SOFT : PFKEYV2_LIFETIME_HARD); 2406 2407 headers[SADB_EXT_ADDRESS_SRC] = p; 2408 export_address(&p, &tdb->tdb_src.sa); 2409 2410 headers[SADB_EXT_ADDRESS_DST] = p; 2411 export_address(&p, &tdb->tdb_dst.sa); 2412 2413 if ((rval = pfkeyv2_sendmessage(headers, PFKEYV2_SENDMESSAGE_BROADCAST, 2414 NULL, 0, 0, tdb->tdb_rdomain)) != 0) 2415 goto ret; 2416 /* XXX */ 2417 if (tdb->tdb_rdomain != tdb->tdb_rdomain_post) 2418 if ((rval = pfkeyv2_sendmessage(headers, 2419 PFKEYV2_SENDMESSAGE_BROADCAST, NULL, 0, 0, 2420 tdb->tdb_rdomain_post)) != 0) 2421 goto ret; 2422 2423 rval = 0; 2424 2425 ret: 2426 if (buffer != NULL) { 2427 explicit_bzero(buffer, i); 2428 free(buffer, M_PFKEY, i); 2429 } 2430 2431 return (rval); 2432 } 2433 2434 struct pfkeyv2_sysctl_walk { 2435 void *w_where; 2436 size_t w_len; 2437 int w_op; 2438 u_int8_t w_satype; 2439 }; 2440 2441 int 2442 pfkeyv2_sysctl_walker(struct tdb *tdb, void *arg, int last) 2443 { 2444 struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg; 2445 void *buffer = NULL; 2446 int error = 0; 2447 int usedlen, buflen, i; 2448 2449 if (w->w_satype != SADB_SATYPE_UNSPEC && 2450 w->w_satype != tdb->tdb_satype) 2451 return (0); 2452 2453 if (w->w_where) { 2454 void *headers[SADB_EXT_MAX+1]; 2455 struct sadb_msg msg; 2456 2457 bzero(headers, sizeof(headers)); 2458 if ((error = pfkeyv2_get(tdb, headers, &buffer, &buflen, 2459 &usedlen)) != 0) 2460 goto done; 2461 if (w->w_len < sizeof(msg) + usedlen) { 2462 error = ENOMEM; 2463 goto done; 2464 } 2465 /* prepend header */ 2466 bzero(&msg, sizeof(msg)); 2467 msg.sadb_msg_version = PF_KEY_V2; 2468 msg.sadb_msg_satype = tdb->tdb_satype; 2469 msg.sadb_msg_type = SADB_DUMP; 2470 msg.sadb_msg_len = (sizeof(msg) + usedlen) / sizeof(uint64_t); 2471 if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0) 2472 goto done; 2473 w->w_where += sizeof(msg); 2474 w->w_len -= sizeof(msg); 2475 /* set extension type */ 2476 for (i = 1; i <= SADB_EXT_MAX; i++) 2477 if (headers[i]) 2478 ((struct sadb_ext *) 2479 headers[i])->sadb_ext_type = i; 2480 if ((error = copyout(buffer, w->w_where, usedlen)) != 0) 2481 goto done; 2482 w->w_where += usedlen; 2483 w->w_len -= usedlen; 2484 } else { 2485 if ((error = pfkeyv2_get(tdb, NULL, NULL, &buflen, NULL)) != 0) 2486 return (error); 2487 w->w_len += buflen; 2488 w->w_len += sizeof(struct sadb_msg); 2489 } 2490 2491 done: 2492 if (buffer != NULL) { 2493 explicit_bzero(buffer, buflen); 2494 free(buffer, M_PFKEY, buflen); 2495 } 2496 return (error); 2497 } 2498 2499 int 2500 pfkeyv2_dump_policy(struct ipsec_policy *ipo, void **headers, void **buffer, 2501 int *lenp) 2502 { 2503 int i, rval, perm; 2504 void *p; 2505 2506 /* Find how much space we need. */ 2507 i = 2 * sizeof(struct sadb_protocol); 2508 2509 /* We'll need four of them: src, src mask, dst, dst mask. */ 2510 switch (ipo->ipo_addr.sen_type) { 2511 case SENT_IP4: 2512 i += 4 * PADUP(sizeof(struct sockaddr_in)); 2513 i += 4 * sizeof(struct sadb_address); 2514 break; 2515 #ifdef INET6 2516 case SENT_IP6: 2517 i += 4 * PADUP(sizeof(struct sockaddr_in6)); 2518 i += 4 * sizeof(struct sadb_address); 2519 break; 2520 #endif /* INET6 */ 2521 default: 2522 return (EINVAL); 2523 } 2524 2525 /* Local address, might be zeroed. */ 2526 switch (ipo->ipo_src.sa.sa_family) { 2527 case 0: 2528 break; 2529 case AF_INET: 2530 i += PADUP(sizeof(struct sockaddr_in)); 2531 i += sizeof(struct sadb_address); 2532 break; 2533 #ifdef INET6 2534 case AF_INET6: 2535 i += PADUP(sizeof(struct sockaddr_in6)); 2536 i += sizeof(struct sadb_address); 2537 break; 2538 #endif /* INET6 */ 2539 default: 2540 return (EINVAL); 2541 } 2542 2543 /* Remote address, might be zeroed. XXX ??? */ 2544 switch (ipo->ipo_dst.sa.sa_family) { 2545 case 0: 2546 break; 2547 case AF_INET: 2548 i += PADUP(sizeof(struct sockaddr_in)); 2549 i += sizeof(struct sadb_address); 2550 break; 2551 #ifdef INET6 2552 case AF_INET6: 2553 i += PADUP(sizeof(struct sockaddr_in6)); 2554 i += sizeof(struct sadb_address); 2555 break; 2556 #endif /* INET6 */ 2557 default: 2558 return (EINVAL); 2559 } 2560 2561 if (ipo->ipo_ids) { 2562 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_local->len); 2563 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_remote->len); 2564 } 2565 2566 if (lenp) 2567 *lenp = i; 2568 2569 if (buffer == NULL) { 2570 rval = 0; 2571 goto ret; 2572 } 2573 2574 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 2575 rval = ENOMEM; 2576 goto ret; 2577 } else 2578 *buffer = p; 2579 2580 /* Local address. */ 2581 if (ipo->ipo_src.sa.sa_family) { 2582 headers[SADB_EXT_ADDRESS_SRC] = p; 2583 export_address(&p, &ipo->ipo_src.sa); 2584 } 2585 2586 /* Remote address. */ 2587 if (ipo->ipo_dst.sa.sa_family) { 2588 headers[SADB_EXT_ADDRESS_DST] = p; 2589 export_address(&p, &ipo->ipo_dst.sa); 2590 } 2591 2592 /* Get actual flow. */ 2593 export_flow(&p, ipo->ipo_type, &ipo->ipo_addr, &ipo->ipo_mask, 2594 headers); 2595 2596 /* Add ids only when we are root. */ 2597 perm = suser(curproc); 2598 if (perm == 0 && ipo->ipo_ids) 2599 export_identities(&p, ipo->ipo_ids, 0, headers); 2600 2601 rval = 0; 2602 ret: 2603 return (rval); 2604 } 2605 2606 int 2607 pfkeyv2_sysctl_policydumper(struct ipsec_policy *ipo, void *arg, 2608 unsigned int tableid) 2609 { 2610 struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg; 2611 void *buffer = 0; 2612 int i, buflen, error = 0; 2613 2614 if (w->w_where) { 2615 void *headers[SADB_EXT_MAX + 1]; 2616 struct sadb_msg msg; 2617 2618 bzero(headers, sizeof(headers)); 2619 if ((error = pfkeyv2_dump_policy(ipo, headers, &buffer, 2620 &buflen)) != 0) 2621 goto done; 2622 if (w->w_len < buflen) { 2623 error = ENOMEM; 2624 goto done; 2625 } 2626 /* prepend header */ 2627 bzero(&msg, sizeof(msg)); 2628 msg.sadb_msg_version = PF_KEY_V2; 2629 if (ipo->ipo_sproto == IPPROTO_ESP) 2630 msg.sadb_msg_satype = SADB_SATYPE_ESP; 2631 else if (ipo->ipo_sproto == IPPROTO_AH) 2632 msg.sadb_msg_satype = SADB_SATYPE_AH; 2633 else if (ipo->ipo_sproto == IPPROTO_IPCOMP) 2634 msg.sadb_msg_satype = SADB_X_SATYPE_IPCOMP; 2635 else if (ipo->ipo_sproto == IPPROTO_IPIP) 2636 msg.sadb_msg_satype = SADB_X_SATYPE_IPIP; 2637 msg.sadb_msg_type = SADB_X_SPDDUMP; 2638 msg.sadb_msg_len = (sizeof(msg) + buflen) / sizeof(uint64_t); 2639 if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0) 2640 goto done; 2641 w->w_where += sizeof(msg); 2642 w->w_len -= sizeof(msg); 2643 /* set extension type */ 2644 for (i = 1; i <= SADB_EXT_MAX; i++) 2645 if (headers[i]) 2646 ((struct sadb_ext *) 2647 headers[i])->sadb_ext_type = i; 2648 if ((error = copyout(buffer, w->w_where, buflen)) != 0) 2649 goto done; 2650 w->w_where += buflen; 2651 w->w_len -= buflen; 2652 } else { 2653 if ((error = pfkeyv2_dump_policy(ipo, NULL, NULL, 2654 &buflen)) != 0) 2655 goto done; 2656 w->w_len += buflen; 2657 w->w_len += sizeof(struct sadb_msg); 2658 } 2659 2660 done: 2661 if (buffer) 2662 free(buffer, M_PFKEY, buflen); 2663 return (error); 2664 } 2665 2666 int 2667 pfkeyv2_policy_flush(struct ipsec_policy *ipo, void *arg, unsigned int tableid) 2668 { 2669 int error; 2670 2671 error = ipsec_delete_policy(ipo); 2672 if (error == 0) 2673 error = EAGAIN; 2674 2675 return (error); 2676 } 2677 2678 int 2679 pfkeyv2_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 2680 void *new, size_t newlen) 2681 { 2682 struct pfkeyv2_sysctl_walk w; 2683 int error = EINVAL; 2684 u_int rdomain; 2685 u_int tableid; 2686 2687 if (new) 2688 return (EPERM); 2689 if (namelen < 1) 2690 return (EINVAL); 2691 w.w_op = name[0]; 2692 w.w_satype = name[1]; 2693 w.w_where = oldp; 2694 w.w_len = oldp ? *oldlenp : 0; 2695 2696 if (namelen == 3) { 2697 tableid = name[2]; 2698 if (!rtable_exists(tableid)) 2699 return (ENOENT); 2700 } else 2701 tableid = curproc->p_p->ps_rtableid; 2702 rdomain = rtable_l2(tableid); 2703 2704 switch(w.w_op) { 2705 case NET_KEY_SADB_DUMP: 2706 if ((error = suser(curproc)) != 0) 2707 return (error); 2708 NET_LOCK(); 2709 error = tdb_walk(rdomain, pfkeyv2_sysctl_walker, &w); 2710 NET_UNLOCK(); 2711 if (oldp) 2712 *oldlenp = w.w_where - oldp; 2713 else 2714 *oldlenp = w.w_len; 2715 break; 2716 2717 case NET_KEY_SPD_DUMP: 2718 NET_LOCK(); 2719 error = spd_table_walk(rdomain, 2720 pfkeyv2_sysctl_policydumper, &w); 2721 NET_UNLOCK(); 2722 if (oldp) 2723 *oldlenp = w.w_where - oldp; 2724 else 2725 *oldlenp = w.w_len; 2726 break; 2727 } 2728 2729 return (error); 2730 } 2731