1 /* $OpenBSD: pfkeyv2.c,v 1.211 2021/05/04 09:28:04 mvs Exp $ */ 2 3 /* 4 * @(#)COPYRIGHT 1.1 (NRL) 17 January 1995 5 * 6 * NRL grants permission for redistribution and use in source and binary 7 * forms, with or without modification, of the software and documentation 8 * created at NRL provided that the following conditions are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgements: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * This product includes software developed at the Information 20 * Technology Division, US Naval Research Laboratory. 21 * 4. Neither the name of the NRL nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL AND CONTRIBUTORS ``AS 26 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 28 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NRL OR 29 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 30 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 31 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 32 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * The views and conclusions contained in the software and documentation 38 * are those of the authors and should not be interpreted as representing 39 * official policies, either expressed or implied, of the US Naval 40 * Research Laboratory (NRL). 41 */ 42 43 /* 44 * Copyright (c) 1995, 1996, 1997, 1998, 1999 Craig Metz. All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. Neither the name of the author nor the names of any contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #include "pf.h" 72 73 #include <sys/param.h> 74 #include <sys/socket.h> 75 #include <sys/socketvar.h> 76 #include <sys/protosw.h> 77 #include <sys/domain.h> 78 #include <sys/systm.h> 79 #include <sys/mbuf.h> 80 #include <sys/kernel.h> 81 #include <sys/proc.h> 82 #include <sys/pool.h> 83 #include <sys/mutex.h> 84 85 #include <net/route.h> 86 #include <netinet/ip_ipsp.h> 87 #include <net/pfkeyv2.h> 88 #include <net/radix.h> 89 #include <netinet/ip_ah.h> 90 #include <netinet/ip_esp.h> 91 #include <netinet/ip_ipcomp.h> 92 #include <crypto/blf.h> 93 94 #if NPF > 0 95 #include <net/if.h> 96 #include <net/pfvar.h> 97 #endif 98 99 #define PFKEYSNDQ 8192 100 #define PFKEYRCVQ 8192 101 102 static const struct sadb_alg ealgs[] = { 103 { SADB_EALG_NULL, 0, 0, 0 }, 104 { SADB_EALG_3DESCBC, 64, 192, 192 }, 105 { SADB_X_EALG_BLF, 64, 40, BLF_MAXKEYLEN * 8}, 106 { SADB_X_EALG_CAST, 64, 40, 128}, 107 { SADB_X_EALG_AES, 128, 128, 256}, 108 { SADB_X_EALG_AESCTR, 128, 128 + 32, 256 + 32} 109 }; 110 111 static const struct sadb_alg aalgs[] = { 112 { SADB_AALG_SHA1HMAC, 0, 160, 160 }, 113 { SADB_AALG_MD5HMAC, 0, 128, 128 }, 114 { SADB_X_AALG_RIPEMD160HMAC, 0, 160, 160 }, 115 { SADB_X_AALG_SHA2_256, 0, 256, 256 }, 116 { SADB_X_AALG_SHA2_384, 0, 384, 384 }, 117 { SADB_X_AALG_SHA2_512, 0, 512, 512 } 118 }; 119 120 static const struct sadb_alg calgs[] = { 121 { SADB_X_CALG_DEFLATE, 0, 0, 0}, 122 { 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 struct pool pkpcb_pool; 131 #define PFKEY_MSG_MAXSZ 4096 132 const struct sockaddr pfkey_addr = { 2, PF_KEY, }; 133 struct domain pfkeydomain; 134 135 /* 136 * pfkey PCB 137 * 138 * Locks used to protect struct members in this file: 139 * I immutable after creation 140 * a atomic operations 141 * l pkptable's lock 142 * s socket lock 143 */ 144 struct pkpcb { 145 struct socket *kcb_socket; /* [I] associated socket */ 146 147 SRPL_ENTRY(pkpcb) kcb_list; /* [l] */ 148 struct refcnt kcb_refcnt; /* [a] */ 149 int kcb_flags; /* [s] */ 150 uint32_t kcb_reg; /* [s] Inc if SATYPE_MAX > 31 */ 151 uint32_t kcb_pid; /* [I] */ 152 unsigned int kcb_rdomain; /* [I] routing domain */ 153 }; 154 #define sotokeycb(so) ((struct pkpcb *)(so)->so_pcb) 155 #define keylock(kp) solock((kp)->kcb_socket) 156 #define keyunlock(kp, s) sounlock((kp)->kcb_socket, s) 157 158 159 struct dump_state { 160 struct sadb_msg *sadb_msg; 161 struct socket *socket; 162 }; 163 164 struct pkptable { 165 SRPL_HEAD(, pkpcb) pkp_list; 166 struct srpl_rc pkp_rc; 167 struct rwlock pkp_lk; 168 }; 169 170 struct pkptable pkptable; 171 struct mutex pfkeyv2_mtx = MUTEX_INITIALIZER(IPL_MPFLOOR); 172 static uint32_t pfkeyv2_seq = 1; 173 static int nregistered = 0; 174 static int npromisc = 0; 175 176 void pfkey_init(void); 177 178 int pfkeyv2_attach(struct socket *, int); 179 int pfkeyv2_detach(struct socket *); 180 int pfkeyv2_usrreq(struct socket *, int, struct mbuf *, struct mbuf *, 181 struct mbuf *, struct proc *); 182 int pfkeyv2_output(struct mbuf *, struct socket *, struct sockaddr *, 183 struct mbuf *); 184 int pfkey_sendup(struct pkpcb *, struct mbuf *, int); 185 int pfkeyv2_sa_flush(struct tdb *, void *, int); 186 int pfkeyv2_policy_flush(struct ipsec_policy *, void *, unsigned int); 187 int pfkeyv2_sysctl_policydumper(struct ipsec_policy *, void *, unsigned int); 188 189 void keycb_ref(void *, void *); 190 void keycb_unref(void *, void *); 191 192 /* 193 * Wrapper around m_devget(); copy data from contiguous buffer to mbuf 194 * chain. 195 */ 196 int 197 pfdatatopacket(void *data, int len, struct mbuf **packet) 198 { 199 if (!(*packet = m_devget(data, len, 0))) 200 return (ENOMEM); 201 202 /* Make sure, all data gets zeroized on free */ 203 (*packet)->m_flags |= M_ZEROIZE; 204 205 return (0); 206 } 207 208 static struct protosw pfkeysw[] = { 209 { 210 .pr_type = SOCK_RAW, 211 .pr_domain = &pfkeydomain, 212 .pr_protocol = PF_KEY_V2, 213 .pr_flags = PR_ATOMIC | PR_ADDR, 214 .pr_output = pfkeyv2_output, 215 .pr_usrreq = pfkeyv2_usrreq, 216 .pr_attach = pfkeyv2_attach, 217 .pr_detach = pfkeyv2_detach, 218 .pr_sysctl = pfkeyv2_sysctl, 219 } 220 }; 221 222 struct domain pfkeydomain = { 223 .dom_family = PF_KEY, 224 .dom_name = "PF_KEY", 225 .dom_init = pfkey_init, 226 .dom_protosw = pfkeysw, 227 .dom_protoswNPROTOSW = &pfkeysw[nitems(pfkeysw)], 228 }; 229 230 void 231 keycb_ref(void *null, void *v) 232 { 233 struct pkpcb *kp = v; 234 235 refcnt_take(&kp->kcb_refcnt); 236 } 237 238 void 239 keycb_unref(void *null, void *v) 240 { 241 struct pkpcb *kp = v; 242 243 refcnt_rele_wake(&kp->kcb_refcnt); 244 } 245 246 void 247 pfkey_init(void) 248 { 249 rn_init(sizeof(struct sockaddr_encap)); 250 srpl_rc_init(&pkptable.pkp_rc, keycb_ref, keycb_unref, NULL); 251 rw_init(&pkptable.pkp_lk, "pfkey"); 252 SRPL_INIT(&pkptable.pkp_list); 253 pool_init(&pkpcb_pool, sizeof(struct pkpcb), 0, 254 IPL_NONE, PR_WAITOK, "pkpcb", NULL); 255 pool_init(&ipsec_policy_pool, sizeof(struct ipsec_policy), 0, 256 IPL_SOFTNET, 0, "ipsec policy", 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 error = soreserve(so, PFKEYSNDQ, PFKEYRCVQ); 273 if (error) 274 return (error); 275 276 kp = pool_get(&pkpcb_pool, PR_WAITOK|PR_ZERO); 277 so->so_pcb = kp; 278 refcnt_init(&kp->kcb_refcnt); 279 kp->kcb_socket = so; 280 kp->kcb_pid = curproc->p_p->ps_pid; 281 kp->kcb_rdomain = rtable_l2(curproc->p_p->ps_rtableid); 282 283 so->so_options |= SO_USELOOPBACK; 284 soisconnected(so); 285 286 rw_enter(&pkptable.pkp_lk, RW_WRITE); 287 SRPL_INSERT_HEAD_LOCKED(&pkptable.pkp_rc, &pkptable.pkp_list, kp, kcb_list); 288 rw_exit(&pkptable.pkp_lk); 289 290 return (0); 291 } 292 293 /* 294 * Close a PF_KEYv2 socket. 295 */ 296 int 297 pfkeyv2_detach(struct socket *so) 298 { 299 struct pkpcb *kp; 300 301 soassertlocked(so); 302 303 kp = sotokeycb(so); 304 if (kp == NULL) 305 return ENOTCONN; 306 307 if (kp->kcb_flags & 308 (PFKEYV2_SOCKETFLAGS_REGISTERED|PFKEYV2_SOCKETFLAGS_PROMISC)) { 309 mtx_enter(&pfkeyv2_mtx); 310 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED) 311 nregistered--; 312 313 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC) 314 npromisc--; 315 mtx_leave(&pfkeyv2_mtx); 316 } 317 318 rw_enter(&pkptable.pkp_lk, RW_WRITE); 319 SRPL_REMOVE_LOCKED(&pkptable.pkp_rc, &pkptable.pkp_list, kp, pkpcb, 320 kcb_list); 321 rw_exit(&pkptable.pkp_lk); 322 323 /* wait for all references to drop */ 324 refcnt_finalize(&kp->kcb_refcnt, "pfkeyrefs"); 325 326 so->so_pcb = NULL; 327 KASSERT((so->so_state & SS_NOFDREF) == 0); 328 pool_put(&pkpcb_pool, kp); 329 330 return (0); 331 } 332 333 int 334 pfkeyv2_usrreq(struct socket *so, int req, struct mbuf *m, 335 struct mbuf *nam, struct mbuf *control, struct proc *p) 336 { 337 struct pkpcb *kp; 338 int error = 0; 339 340 if (req == PRU_CONTROL) 341 return (EOPNOTSUPP); 342 343 soassertlocked(so); 344 345 if (control && control->m_len) { 346 error = EOPNOTSUPP; 347 goto release; 348 } 349 350 kp = sotokeycb(so); 351 if (kp == NULL) { 352 error = EINVAL; 353 goto release; 354 } 355 356 switch (req) { 357 /* no connect, bind, accept. Socket is connected from the start */ 358 case PRU_CONNECT: 359 case PRU_BIND: 360 case PRU_CONNECT2: 361 case PRU_LISTEN: 362 case PRU_ACCEPT: 363 error = EOPNOTSUPP; 364 break; 365 366 case PRU_DISCONNECT: 367 case PRU_ABORT: 368 soisdisconnected(so); 369 break; 370 case PRU_SHUTDOWN: 371 socantsendmore(so); 372 break; 373 case PRU_SENSE: 374 /* stat: don't bother with a blocksize. */ 375 break; 376 377 /* minimal support, just implement a fake peer address */ 378 case PRU_SOCKADDR: 379 error = EINVAL; 380 break; 381 case PRU_PEERADDR: 382 bcopy(&pfkey_addr, mtod(nam, caddr_t), pfkey_addr.sa_len); 383 nam->m_len = pfkey_addr.sa_len; 384 break; 385 386 case PRU_RCVOOB: 387 case PRU_RCVD: 388 case PRU_SENDOOB: 389 error = EOPNOTSUPP; 390 break; 391 case PRU_SEND: 392 if (nam) { 393 error = EISCONN; 394 break; 395 } 396 error = (*so->so_proto->pr_output)(m, so, NULL, NULL); 397 m = NULL; 398 break; 399 default: 400 panic("pfkeyv2_usrreq"); 401 } 402 403 release: 404 if (req != PRU_RCVD && req != PRU_RCVOOB && req != PRU_SENSE) { 405 m_freem(control); 406 m_freem(m); 407 } 408 return (error); 409 } 410 411 int 412 pfkeyv2_output(struct mbuf *mbuf, struct socket *so, 413 struct sockaddr *dstaddr, struct mbuf *control) 414 { 415 void *message; 416 int error = 0; 417 418 #ifdef DIAGNOSTIC 419 if (!mbuf || !(mbuf->m_flags & M_PKTHDR)) { 420 error = EINVAL; 421 goto ret; 422 } 423 #endif /* DIAGNOSTIC */ 424 425 if (mbuf->m_pkthdr.len > PFKEY_MSG_MAXSZ) { 426 error = EMSGSIZE; 427 goto ret; 428 } 429 430 if (!(message = malloc((unsigned long) mbuf->m_pkthdr.len, 431 M_PFKEY, M_DONTWAIT))) { 432 error = ENOMEM; 433 goto ret; 434 } 435 436 m_copydata(mbuf, 0, mbuf->m_pkthdr.len, message); 437 438 error = pfkeyv2_send(so, message, mbuf->m_pkthdr.len); 439 440 ret: 441 m_freem(mbuf); 442 return (error); 443 } 444 445 int 446 pfkey_sendup(struct pkpcb *kp, struct mbuf *m0, int more) 447 { 448 struct socket *so = kp->kcb_socket; 449 struct mbuf *m; 450 451 soassertlocked(so); 452 453 if (more) { 454 if (!(m = m_dup_pkt(m0, 0, M_DONTWAIT))) 455 return (ENOMEM); 456 } else 457 m = m0; 458 459 if (!sbappendaddr(so, &so->so_rcv, &pfkey_addr, m, NULL)) { 460 m_freem(m); 461 return (ENOBUFS); 462 } 463 464 sorwakeup(so); 465 return (0); 466 } 467 468 /* 469 * Send a PFKEYv2 message, possibly to many receivers, based on the 470 * satype of the socket (which is set by the REGISTER message), and the 471 * third argument. 472 */ 473 int 474 pfkeyv2_sendmessage(void **headers, int mode, struct socket *so, 475 u_int8_t satype, int count, u_int rdomain) 476 { 477 int i, j, rval, s; 478 void *p, *buffer = NULL; 479 struct mbuf *packet; 480 struct pkpcb *kp; 481 struct sadb_msg *smsg; 482 struct srp_ref sr; 483 484 /* Find out how much space we'll need... */ 485 j = sizeof(struct sadb_msg); 486 487 for (i = 1; i <= SADB_EXT_MAX; i++) 488 if (headers[i]) 489 j += ((struct sadb_ext *)headers[i])->sadb_ext_len * 490 sizeof(uint64_t); 491 492 /* ...and allocate it */ 493 if (!(buffer = malloc(j + sizeof(struct sadb_msg), M_PFKEY, 494 M_NOWAIT))) { 495 rval = ENOMEM; 496 goto ret; 497 } 498 499 p = buffer + sizeof(struct sadb_msg); 500 bcopy(headers[0], p, sizeof(struct sadb_msg)); 501 ((struct sadb_msg *) p)->sadb_msg_len = j / sizeof(uint64_t); 502 p += sizeof(struct sadb_msg); 503 504 /* Copy payloads in the packet */ 505 for (i = 1; i <= SADB_EXT_MAX; i++) 506 if (headers[i]) { 507 ((struct sadb_ext *) headers[i])->sadb_ext_type = i; 508 bcopy(headers[i], p, EXTLEN(headers[i])); 509 p += EXTLEN(headers[i]); 510 } 511 512 if ((rval = pfdatatopacket(buffer + sizeof(struct sadb_msg), 513 j, &packet)) != 0) 514 goto ret; 515 516 switch (mode) { 517 case PFKEYV2_SENDMESSAGE_UNICAST: 518 /* 519 * Send message to the specified socket, plus all 520 * promiscuous listeners. 521 */ 522 s = solock(so); 523 pfkey_sendup(sotokeycb(so), packet, 0); 524 sounlock(so, s); 525 526 /* 527 * Promiscuous messages contain the original message 528 * encapsulated in another sadb_msg header. 529 */ 530 bzero(buffer, sizeof(struct sadb_msg)); 531 smsg = (struct sadb_msg *) buffer; 532 smsg->sadb_msg_version = PF_KEY_V2; 533 smsg->sadb_msg_type = SADB_X_PROMISC; 534 smsg->sadb_msg_len = (sizeof(struct sadb_msg) + j) / 535 sizeof(uint64_t); 536 smsg->sadb_msg_seq = 0; 537 538 /* Copy to mbuf chain */ 539 if ((rval = pfdatatopacket(buffer, sizeof(struct sadb_msg) + j, 540 &packet)) != 0) 541 goto ret; 542 543 /* 544 * Search for promiscuous listeners, skipping the 545 * original destination. 546 */ 547 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) { 548 if (kp->kcb_socket == so || kp->kcb_rdomain != rdomain) 549 continue; 550 551 s = keylock(kp); 552 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC) 553 pfkey_sendup(kp, packet, 1); 554 keyunlock(kp, s); 555 } 556 SRPL_LEAVE(&sr); 557 m_freem(packet); 558 break; 559 560 case PFKEYV2_SENDMESSAGE_REGISTERED: 561 /* 562 * Send the message to all registered sockets that match 563 * the specified satype (e.g., all IPSEC-ESP negotiators) 564 */ 565 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) { 566 if (kp->kcb_rdomain != rdomain) 567 continue; 568 569 s = keylock(kp); 570 if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED) { 571 if (!satype) { 572 /* Just send to everyone registered */ 573 pfkey_sendup(kp, packet, 1); 574 } else { 575 /* Check for specified satype */ 576 if ((1 << satype) & kp->kcb_reg) 577 pfkey_sendup(kp, packet, 1); 578 } 579 } 580 keyunlock(kp, s); 581 } 582 SRPL_LEAVE(&sr); 583 /* Free last/original copy of the packet */ 584 m_freem(packet); 585 586 /* Encapsulate the original message "inside" an sadb_msg header */ 587 bzero(buffer, sizeof(struct sadb_msg)); 588 smsg = (struct sadb_msg *) buffer; 589 smsg->sadb_msg_version = PF_KEY_V2; 590 smsg->sadb_msg_type = SADB_X_PROMISC; 591 smsg->sadb_msg_len = (sizeof(struct sadb_msg) + j) / 592 sizeof(uint64_t); 593 smsg->sadb_msg_seq = 0; 594 595 /* Convert to mbuf chain */ 596 if ((rval = pfdatatopacket(buffer, sizeof(struct sadb_msg) + j, 597 &packet)) != 0) 598 goto ret; 599 600 /* Send to all registered promiscuous listeners */ 601 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) { 602 if (kp->kcb_rdomain != rdomain) 603 continue; 604 605 s = keylock(kp); 606 if ((kp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC) && 607 !(kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED)) 608 pfkey_sendup(kp, packet, 1); 609 keyunlock(kp, s); 610 } 611 SRPL_LEAVE(&sr); 612 m_freem(packet); 613 break; 614 615 case PFKEYV2_SENDMESSAGE_BROADCAST: 616 /* Send message to all sockets */ 617 SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) { 618 if (kp->kcb_rdomain != rdomain) 619 continue; 620 621 s = keylock(kp); 622 pfkey_sendup(kp, packet, 1); 623 keyunlock(kp, s); 624 } 625 SRPL_LEAVE(&sr); 626 m_freem(packet); 627 break; 628 } 629 630 ret: 631 if (buffer != NULL) { 632 explicit_bzero(buffer, j + sizeof(struct sadb_msg)); 633 free(buffer, M_PFKEY, j + sizeof(struct sadb_msg)); 634 } 635 636 return (rval); 637 } 638 639 /* 640 * Get SPD information for an ACQUIRE. We setup the message such that 641 * the SRC/DST payloads are relative to us (regardless of whether the 642 * SPD rule was for incoming or outgoing packets). 643 */ 644 int 645 pfkeyv2_policy(struct ipsec_acquire *ipa, void **headers, void **buffer, 646 int *bufferlen) 647 { 648 union sockaddr_union sunion; 649 struct sadb_protocol *sp; 650 int rval, i, dir; 651 void *p; 652 653 /* Find out how big a buffer we need */ 654 i = 4 * sizeof(struct sadb_address) + sizeof(struct sadb_protocol); 655 bzero(&sunion, sizeof(union sockaddr_union)); 656 657 switch (ipa->ipa_info.sen_type) { 658 case SENT_IP4: 659 i += 4 * PADUP(sizeof(struct sockaddr_in)); 660 sunion.sa.sa_family = AF_INET; 661 sunion.sa.sa_len = sizeof(struct sockaddr_in); 662 dir = ipa->ipa_info.sen_direction; 663 break; 664 665 #ifdef INET6 666 case SENT_IP6: 667 i += 4 * PADUP(sizeof(struct sockaddr_in6)); 668 sunion.sa.sa_family = AF_INET6; 669 sunion.sa.sa_len = sizeof(struct sockaddr_in6); 670 dir = ipa->ipa_info.sen_ip6_direction; 671 break; 672 #endif /* INET6 */ 673 674 default: 675 return (EINVAL); 676 } 677 678 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 679 rval = ENOMEM; 680 goto ret; 681 } else { 682 *buffer = p; 683 *bufferlen = i; 684 } 685 686 if (dir == IPSP_DIRECTION_OUT) 687 headers[SADB_X_EXT_SRC_FLOW] = p; 688 else 689 headers[SADB_X_EXT_DST_FLOW] = p; 690 switch (sunion.sa.sa_family) { 691 case AF_INET: 692 sunion.sin.sin_addr = ipa->ipa_info.sen_ip_src; 693 sunion.sin.sin_port = ipa->ipa_info.sen_sport; 694 break; 695 696 #ifdef INET6 697 case AF_INET6: 698 sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_src; 699 sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_sport; 700 break; 701 #endif /* INET6 */ 702 } 703 export_address(&p, &sunion.sa); 704 705 if (dir == IPSP_DIRECTION_OUT) 706 headers[SADB_X_EXT_SRC_MASK] = p; 707 else 708 headers[SADB_X_EXT_DST_MASK] = p; 709 switch (sunion.sa.sa_family) { 710 case AF_INET: 711 sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_src; 712 sunion.sin.sin_port = ipa->ipa_mask.sen_sport; 713 break; 714 715 #ifdef INET6 716 case AF_INET6: 717 sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_src; 718 sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_sport; 719 break; 720 #endif /* INET6 */ 721 } 722 export_address(&p, &sunion.sa); 723 724 if (dir == IPSP_DIRECTION_OUT) 725 headers[SADB_X_EXT_DST_FLOW] = p; 726 else 727 headers[SADB_X_EXT_SRC_FLOW] = p; 728 switch (sunion.sa.sa_family) { 729 case AF_INET: 730 sunion.sin.sin_addr = ipa->ipa_info.sen_ip_dst; 731 sunion.sin.sin_port = ipa->ipa_info.sen_dport; 732 break; 733 734 #ifdef INET6 735 case AF_INET6: 736 sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_dst; 737 sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_dport; 738 break; 739 #endif /* INET6 */ 740 } 741 export_address(&p, &sunion.sa); 742 743 if (dir == IPSP_DIRECTION_OUT) 744 headers[SADB_X_EXT_DST_MASK] = p; 745 else 746 headers[SADB_X_EXT_SRC_MASK] = p; 747 switch (sunion.sa.sa_family) { 748 case AF_INET: 749 sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_dst; 750 sunion.sin.sin_port = ipa->ipa_mask.sen_dport; 751 break; 752 753 #ifdef INET6 754 case AF_INET6: 755 sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_dst; 756 sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_dport; 757 break; 758 #endif /* INET6 */ 759 } 760 export_address(&p, &sunion.sa); 761 762 headers[SADB_X_EXT_FLOW_TYPE] = p; 763 sp = p; 764 sp->sadb_protocol_len = sizeof(struct sadb_protocol) / 765 sizeof(u_int64_t); 766 switch (sunion.sa.sa_family) { 767 case AF_INET: 768 if (ipa->ipa_mask.sen_proto) 769 sp->sadb_protocol_proto = ipa->ipa_info.sen_proto; 770 sp->sadb_protocol_direction = ipa->ipa_info.sen_direction; 771 break; 772 773 #ifdef INET6 774 case AF_INET6: 775 if (ipa->ipa_mask.sen_ip6_proto) 776 sp->sadb_protocol_proto = ipa->ipa_info.sen_ip6_proto; 777 sp->sadb_protocol_direction = ipa->ipa_info.sen_ip6_direction; 778 break; 779 #endif /* INET6 */ 780 } 781 782 rval = 0; 783 784 ret: 785 return (rval); 786 } 787 788 /* 789 * Get all the information contained in an SA to a PFKEYV2 message. 790 */ 791 int 792 pfkeyv2_get(struct tdb *tdb, void **headers, void **buffer, int *lenp, 793 int *lenused) 794 { 795 int rval, i; 796 void *p; 797 798 /* Find how much space we need */ 799 i = sizeof(struct sadb_sa) + sizeof(struct sadb_lifetime) + 800 sizeof(struct sadb_x_counter); 801 802 if (tdb->tdb_soft_allocations || tdb->tdb_soft_bytes || 803 tdb->tdb_soft_timeout || tdb->tdb_soft_first_use) 804 i += sizeof(struct sadb_lifetime); 805 806 if (tdb->tdb_exp_allocations || tdb->tdb_exp_bytes || 807 tdb->tdb_exp_timeout || tdb->tdb_exp_first_use) 808 i += sizeof(struct sadb_lifetime); 809 810 if (tdb->tdb_last_used) 811 i += sizeof(struct sadb_lifetime); 812 813 i += sizeof(struct sadb_address) + PADUP(tdb->tdb_src.sa.sa_len); 814 i += sizeof(struct sadb_address) + PADUP(tdb->tdb_dst.sa.sa_len); 815 816 if (tdb->tdb_ids) { 817 i += sizeof(struct sadb_ident) + PADUP(tdb->tdb_ids->id_local->len); 818 i += sizeof(struct sadb_ident) + PADUP(tdb->tdb_ids->id_remote->len); 819 } 820 821 if (tdb->tdb_amxkey) 822 i += sizeof(struct sadb_key) + PADUP(tdb->tdb_amxkeylen); 823 824 if (tdb->tdb_emxkey) 825 i += sizeof(struct sadb_key) + PADUP(tdb->tdb_emxkeylen); 826 827 if (tdb->tdb_filter.sen_type) { 828 i += 2 * sizeof(struct sadb_protocol); 829 830 /* We'll need four of them: src, src mask, dst, dst mask. */ 831 switch (tdb->tdb_filter.sen_type) { 832 case SENT_IP4: 833 i += 4 * PADUP(sizeof(struct sockaddr_in)); 834 i += 4 * sizeof(struct sadb_address); 835 break; 836 #ifdef INET6 837 case SENT_IP6: 838 i += 4 * PADUP(sizeof(struct sockaddr_in6)); 839 i += 4 * sizeof(struct sadb_address); 840 break; 841 #endif /* INET6 */ 842 default: 843 rval = EINVAL; 844 goto ret; 845 } 846 } 847 848 if (tdb->tdb_onext) { 849 i += sizeof(struct sadb_sa); 850 i += sizeof(struct sadb_address) + 851 PADUP(tdb->tdb_onext->tdb_dst.sa.sa_len); 852 i += sizeof(struct sadb_protocol); 853 } 854 855 if (tdb->tdb_udpencap_port) 856 i += sizeof(struct sadb_x_udpencap); 857 858 if (tdb->tdb_rdomain != tdb->tdb_rdomain_post) 859 i += sizeof(struct sadb_x_rdomain); 860 861 #if NPF > 0 862 if (tdb->tdb_tag) 863 i += sizeof(struct sadb_x_tag) + PADUP(PF_TAG_NAME_SIZE); 864 if (tdb->tdb_tap) 865 i += sizeof(struct sadb_x_tap); 866 #endif 867 868 if (lenp) 869 *lenp = i; 870 871 if (buffer == NULL) { 872 rval = 0; 873 goto ret; 874 } 875 876 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 877 rval = ENOMEM; 878 goto ret; 879 } else 880 *buffer = p; 881 882 headers[SADB_EXT_SA] = p; 883 884 export_sa(&p, tdb); /* Export SA information (mostly flags) */ 885 886 /* Export lifetimes where applicable */ 887 headers[SADB_EXT_LIFETIME_CURRENT] = p; 888 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_CURRENT); 889 890 if (tdb->tdb_soft_allocations || tdb->tdb_soft_bytes || 891 tdb->tdb_soft_first_use || tdb->tdb_soft_timeout) { 892 headers[SADB_EXT_LIFETIME_SOFT] = p; 893 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_SOFT); 894 } 895 896 if (tdb->tdb_exp_allocations || tdb->tdb_exp_bytes || 897 tdb->tdb_exp_first_use || tdb->tdb_exp_timeout) { 898 headers[SADB_EXT_LIFETIME_HARD] = p; 899 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_HARD); 900 } 901 902 if (tdb->tdb_last_used) { 903 headers[SADB_X_EXT_LIFETIME_LASTUSE] = p; 904 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_LASTUSE); 905 } 906 907 /* Export TDB source address */ 908 headers[SADB_EXT_ADDRESS_SRC] = p; 909 export_address(&p, &tdb->tdb_src.sa); 910 911 /* Export TDB destination address */ 912 headers[SADB_EXT_ADDRESS_DST] = p; 913 export_address(&p, &tdb->tdb_dst.sa); 914 915 /* Export source/destination identities, if present */ 916 if (tdb->tdb_ids) 917 export_identities(&p, tdb->tdb_ids, tdb->tdb_ids_swapped, headers); 918 919 /* Export authentication key, if present */ 920 if (tdb->tdb_amxkey) { 921 headers[SADB_EXT_KEY_AUTH] = p; 922 export_key(&p, tdb, PFKEYV2_AUTHENTICATION_KEY); 923 } 924 925 /* Export encryption key, if present */ 926 if (tdb->tdb_emxkey) { 927 headers[SADB_EXT_KEY_ENCRYPT] = p; 928 export_key(&p, tdb, PFKEYV2_ENCRYPTION_KEY); 929 } 930 931 /* Export flow/filter, if present */ 932 if (tdb->tdb_filter.sen_type) 933 export_flow(&p, IPSP_IPSEC_USE, &tdb->tdb_filter, 934 &tdb->tdb_filtermask, headers); 935 936 if (tdb->tdb_onext) { 937 headers[SADB_X_EXT_SA2] = p; 938 export_sa(&p, tdb->tdb_onext); 939 headers[SADB_X_EXT_DST2] = p; 940 export_address(&p, &tdb->tdb_onext->tdb_dst.sa); 941 headers[SADB_X_EXT_SATYPE2] = p; 942 export_satype(&p, tdb->tdb_onext); 943 } 944 945 /* Export UDP encapsulation port, if present */ 946 if (tdb->tdb_udpencap_port) { 947 headers[SADB_X_EXT_UDPENCAP] = p; 948 export_udpencap(&p, tdb); 949 } 950 951 /* Export rdomain switch, if present */ 952 if (tdb->tdb_rdomain != tdb->tdb_rdomain_post) { 953 headers[SADB_X_EXT_RDOMAIN] = p; 954 export_rdomain(&p, tdb); 955 } 956 957 #if NPF > 0 958 /* Export tag information, if present */ 959 if (tdb->tdb_tag) { 960 headers[SADB_X_EXT_TAG] = p; 961 export_tag(&p, tdb); 962 } 963 964 /* Export tap enc(4) device information, if present */ 965 if (tdb->tdb_tap) { 966 headers[SADB_X_EXT_TAP] = p; 967 export_tap(&p, tdb); 968 } 969 #endif 970 971 headers[SADB_X_EXT_COUNTER] = p; 972 export_counter(&p, tdb); 973 974 if (lenused) 975 *lenused = p - *buffer; 976 rval = 0; 977 978 ret: 979 return (rval); 980 } 981 982 /* 983 * Dump a TDB. 984 */ 985 int 986 pfkeyv2_dump_walker(struct tdb *tdb, void *state, int last) 987 { 988 struct dump_state *dump_state = (struct dump_state *) state; 989 void *headers[SADB_EXT_MAX+1], *buffer; 990 int buflen; 991 int rval; 992 993 /* If not satype was specified, dump all TDBs */ 994 if (!dump_state->sadb_msg->sadb_msg_satype || 995 (tdb->tdb_satype == dump_state->sadb_msg->sadb_msg_satype)) { 996 bzero(headers, sizeof(headers)); 997 headers[0] = (void *) dump_state->sadb_msg; 998 999 /* Get the information from the TDB to a PFKEYv2 message */ 1000 if ((rval = pfkeyv2_get(tdb, headers, &buffer, &buflen, NULL)) != 0) 1001 return (rval); 1002 1003 if (last) 1004 ((struct sadb_msg *)headers[0])->sadb_msg_seq = 0; 1005 1006 /* Send the message to the specified socket */ 1007 rval = pfkeyv2_sendmessage(headers, 1008 PFKEYV2_SENDMESSAGE_UNICAST, dump_state->socket, 0, 0, 1009 tdb->tdb_rdomain); 1010 1011 explicit_bzero(buffer, buflen); 1012 free(buffer, M_PFKEY, buflen); 1013 if (rval) 1014 return (rval); 1015 } 1016 1017 return (0); 1018 } 1019 1020 /* 1021 * Delete an SA. 1022 */ 1023 int 1024 pfkeyv2_sa_flush(struct tdb *tdb, void *satype_vp, int last) 1025 { 1026 if (!(*((u_int8_t *) satype_vp)) || 1027 tdb->tdb_satype == *((u_int8_t *) satype_vp)) 1028 tdb_delete(tdb); 1029 return (0); 1030 } 1031 1032 /* 1033 * Convert between SATYPEs and IPsec protocols, taking into consideration 1034 * sysctl variables enabling/disabling ESP/AH and the presence of the old 1035 * IPsec transforms. 1036 */ 1037 int 1038 pfkeyv2_get_proto_alg(u_int8_t satype, u_int8_t *sproto, int *alg) 1039 { 1040 switch (satype) { 1041 #ifdef IPSEC 1042 case SADB_SATYPE_AH: 1043 if (!ah_enable) 1044 return (EOPNOTSUPP); 1045 1046 *sproto = IPPROTO_AH; 1047 1048 if(alg != NULL) 1049 *alg = satype = XF_AH; 1050 1051 break; 1052 1053 case SADB_SATYPE_ESP: 1054 if (!esp_enable) 1055 return (EOPNOTSUPP); 1056 1057 *sproto = IPPROTO_ESP; 1058 1059 if(alg != NULL) 1060 *alg = satype = XF_ESP; 1061 1062 break; 1063 1064 case SADB_X_SATYPE_IPIP: 1065 *sproto = IPPROTO_IPIP; 1066 1067 if (alg != NULL) 1068 *alg = XF_IP4; 1069 1070 break; 1071 1072 case SADB_X_SATYPE_IPCOMP: 1073 if (!ipcomp_enable) 1074 return (EOPNOTSUPP); 1075 1076 *sproto = IPPROTO_IPCOMP; 1077 1078 if(alg != NULL) 1079 *alg = satype = XF_IPCOMP; 1080 1081 break; 1082 #endif /* IPSEC */ 1083 #ifdef TCP_SIGNATURE 1084 case SADB_X_SATYPE_TCPSIGNATURE: 1085 *sproto = IPPROTO_TCP; 1086 1087 if (alg != NULL) 1088 *alg = XF_TCPSIGNATURE; 1089 1090 break; 1091 #endif /* TCP_SIGNATURE */ 1092 1093 default: /* Nothing else supported */ 1094 return (EOPNOTSUPP); 1095 } 1096 1097 return (0); 1098 } 1099 1100 /* 1101 * Handle all messages from userland to kernel. 1102 */ 1103 int 1104 pfkeyv2_send(struct socket *so, void *message, int len) 1105 { 1106 int i, j, rval = 0, mode = PFKEYV2_SENDMESSAGE_BROADCAST; 1107 int delflag = 0; 1108 struct sockaddr_encap encapdst, encapnetmask; 1109 struct ipsec_policy *ipo; 1110 struct ipsec_acquire *ipa; 1111 struct radix_node_head *rnh; 1112 struct radix_node *rn = NULL; 1113 struct pkpcb *kp, *bkp; 1114 void *freeme = NULL, *freeme2 = NULL, *freeme3 = NULL; 1115 int freeme_sz = 0, freeme2_sz = 0, freeme3_sz = 0; 1116 void *bckptr = NULL; 1117 void *headers[SADB_EXT_MAX + 1]; 1118 union sockaddr_union *sunionp; 1119 struct tdb *sa1 = NULL, *sa2 = NULL; 1120 struct sadb_msg *smsg; 1121 struct sadb_spirange *sprng; 1122 struct sadb_sa *ssa; 1123 struct sadb_supported *ssup; 1124 struct sadb_ident *sid, *did; 1125 struct srp_ref sr; 1126 struct sadb_x_rdomain *srdomain; 1127 u_int rdomain = 0; 1128 int promisc, s; 1129 1130 mtx_enter(&pfkeyv2_mtx); 1131 promisc = npromisc; 1132 mtx_leave(&pfkeyv2_mtx); 1133 1134 /* Verify that we received this over a legitimate pfkeyv2 socket */ 1135 bzero(headers, sizeof(headers)); 1136 1137 kp = sotokeycb(so); 1138 if (!kp) { 1139 rval = EINVAL; 1140 goto ret; 1141 } 1142 1143 rdomain = kp->kcb_rdomain; 1144 1145 /* If we have any promiscuous listeners, send them a copy of the message */ 1146 if (promisc) { 1147 struct mbuf *packet; 1148 1149 freeme_sz = sizeof(struct sadb_msg) + len; 1150 if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT))) { 1151 rval = ENOMEM; 1152 goto ret; 1153 } 1154 1155 /* Initialize encapsulating header */ 1156 bzero(freeme, sizeof(struct sadb_msg)); 1157 smsg = (struct sadb_msg *) freeme; 1158 smsg->sadb_msg_version = PF_KEY_V2; 1159 smsg->sadb_msg_type = SADB_X_PROMISC; 1160 smsg->sadb_msg_len = (sizeof(struct sadb_msg) + len) / 1161 sizeof(uint64_t); 1162 smsg->sadb_msg_seq = curproc->p_p->ps_pid; 1163 1164 bcopy(message, freeme + sizeof(struct sadb_msg), len); 1165 1166 /* Convert to mbuf chain */ 1167 if ((rval = pfdatatopacket(freeme, freeme_sz, &packet)) != 0) 1168 goto ret; 1169 1170 /* Send to all promiscuous listeners */ 1171 SRPL_FOREACH(bkp, &sr, &pkptable.pkp_list, kcb_list) { 1172 if (bkp->kcb_rdomain != kp->kcb_rdomain) 1173 continue; 1174 1175 s = keylock(bkp); 1176 if (bkp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC) 1177 pfkey_sendup(bkp, packet, 1); 1178 keyunlock(bkp, s); 1179 } 1180 SRPL_LEAVE(&sr); 1181 1182 m_freem(packet); 1183 1184 /* Paranoid */ 1185 explicit_bzero(freeme, freeme_sz); 1186 free(freeme, M_PFKEY, freeme_sz); 1187 freeme = NULL; 1188 freeme_sz = 0; 1189 } 1190 1191 /* Validate message format */ 1192 if ((rval = pfkeyv2_parsemessage(message, len, headers)) != 0) 1193 goto ret; 1194 1195 /* use specified rdomain */ 1196 srdomain = (struct sadb_x_rdomain *) headers[SADB_X_EXT_RDOMAIN]; 1197 if (srdomain) { 1198 if (!rtable_exists(srdomain->sadb_x_rdomain_dom1) || 1199 !rtable_exists(srdomain->sadb_x_rdomain_dom2)) { 1200 rval = EINVAL; 1201 goto ret; 1202 } 1203 rdomain = srdomain->sadb_x_rdomain_dom1; 1204 } 1205 1206 smsg = (struct sadb_msg *) headers[0]; 1207 switch (smsg->sadb_msg_type) { 1208 case SADB_GETSPI: /* Reserve an SPI */ 1209 sa1 = malloc(sizeof (*sa1), M_PFKEY, M_NOWAIT | M_ZERO); 1210 if (sa1 == NULL) { 1211 rval = ENOMEM; 1212 goto ret; 1213 } 1214 1215 sa1->tdb_satype = smsg->sadb_msg_satype; 1216 if ((rval = pfkeyv2_get_proto_alg(sa1->tdb_satype, 1217 &sa1->tdb_sproto, 0))) 1218 goto ret; 1219 1220 import_address(&sa1->tdb_src.sa, headers[SADB_EXT_ADDRESS_SRC]); 1221 import_address(&sa1->tdb_dst.sa, headers[SADB_EXT_ADDRESS_DST]); 1222 1223 /* Find an unused SA identifier */ 1224 sprng = (struct sadb_spirange *) headers[SADB_EXT_SPIRANGE]; 1225 NET_LOCK(); 1226 sa1->tdb_spi = reserve_spi(rdomain, 1227 sprng->sadb_spirange_min, sprng->sadb_spirange_max, 1228 &sa1->tdb_src, &sa1->tdb_dst, sa1->tdb_sproto, &rval); 1229 if (sa1->tdb_spi == 0) { 1230 NET_UNLOCK(); 1231 goto ret; 1232 } 1233 1234 /* Send a message back telling what the SA (the SPI really) is */ 1235 freeme_sz = sizeof(struct sadb_sa); 1236 if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT | M_ZERO))) { 1237 rval = ENOMEM; 1238 NET_UNLOCK(); 1239 goto ret; 1240 } 1241 1242 headers[SADB_EXT_SPIRANGE] = NULL; 1243 headers[SADB_EXT_SA] = freeme; 1244 bckptr = freeme; 1245 1246 /* We really only care about the SPI, but we'll export the SA */ 1247 export_sa((void **) &bckptr, sa1); 1248 NET_UNLOCK(); 1249 break; 1250 1251 case SADB_UPDATE: 1252 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1253 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] + 1254 sizeof(struct sadb_address)); 1255 1256 /* Either all or none of the flow must be included */ 1257 if ((headers[SADB_X_EXT_SRC_FLOW] || 1258 headers[SADB_X_EXT_PROTOCOL] || 1259 headers[SADB_X_EXT_FLOW_TYPE] || 1260 headers[SADB_X_EXT_DST_FLOW] || 1261 headers[SADB_X_EXT_SRC_MASK] || 1262 headers[SADB_X_EXT_DST_MASK]) && 1263 !(headers[SADB_X_EXT_SRC_FLOW] && 1264 headers[SADB_X_EXT_PROTOCOL] && 1265 headers[SADB_X_EXT_FLOW_TYPE] && 1266 headers[SADB_X_EXT_DST_FLOW] && 1267 headers[SADB_X_EXT_SRC_MASK] && 1268 headers[SADB_X_EXT_DST_MASK])) { 1269 rval = EINVAL; 1270 goto ret; 1271 } 1272 #ifdef IPSEC 1273 /* UDP encap has to be enabled and is only supported for ESP */ 1274 if (headers[SADB_X_EXT_UDPENCAP] && 1275 (!udpencap_enable || 1276 smsg->sadb_msg_satype != SADB_SATYPE_ESP)) { 1277 rval = EINVAL; 1278 goto ret; 1279 } 1280 #endif /* IPSEC */ 1281 1282 /* Find TDB */ 1283 NET_LOCK(); 1284 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1285 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1286 1287 /* If there's no such SA, we're done */ 1288 if (sa2 == NULL) { 1289 rval = ESRCH; 1290 NET_UNLOCK(); 1291 goto ret; 1292 } 1293 1294 /* If this is a reserved SA */ 1295 if (sa2->tdb_flags & TDBF_INVALID) { 1296 struct tdb *newsa; 1297 struct ipsecinit ii; 1298 int alg; 1299 1300 /* Create new TDB */ 1301 freeme_sz = 0; 1302 freeme = tdb_alloc(rdomain); 1303 bzero(&ii, sizeof(struct ipsecinit)); 1304 1305 newsa = (struct tdb *) freeme; 1306 newsa->tdb_satype = smsg->sadb_msg_satype; 1307 1308 if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype, 1309 &newsa->tdb_sproto, &alg))) { 1310 tdb_free(freeme); 1311 freeme = NULL; 1312 NET_UNLOCK(); 1313 goto ret; 1314 } 1315 1316 /* Initialize SA */ 1317 import_sa(newsa, headers[SADB_EXT_SA], &ii); 1318 import_address(&newsa->tdb_src.sa, 1319 headers[SADB_EXT_ADDRESS_SRC]); 1320 import_address(&newsa->tdb_dst.sa, 1321 headers[SADB_EXT_ADDRESS_DST]); 1322 import_lifetime(newsa, 1323 headers[SADB_EXT_LIFETIME_CURRENT], 1324 PFKEYV2_LIFETIME_CURRENT); 1325 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT], 1326 PFKEYV2_LIFETIME_SOFT); 1327 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD], 1328 PFKEYV2_LIFETIME_HARD); 1329 import_key(&ii, headers[SADB_EXT_KEY_AUTH], 1330 PFKEYV2_AUTHENTICATION_KEY); 1331 import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT], 1332 PFKEYV2_ENCRYPTION_KEY); 1333 newsa->tdb_ids_swapped = 1; /* only on TDB_UPDATE */ 1334 import_identities(&newsa->tdb_ids, 1335 newsa->tdb_ids_swapped, 1336 headers[SADB_EXT_IDENTITY_SRC], 1337 headers[SADB_EXT_IDENTITY_DST]); 1338 if ((rval = import_flow(&newsa->tdb_filter, 1339 &newsa->tdb_filtermask, 1340 headers[SADB_X_EXT_SRC_FLOW], 1341 headers[SADB_X_EXT_SRC_MASK], 1342 headers[SADB_X_EXT_DST_FLOW], 1343 headers[SADB_X_EXT_DST_MASK], 1344 headers[SADB_X_EXT_PROTOCOL], 1345 headers[SADB_X_EXT_FLOW_TYPE]))) { 1346 tdb_free(freeme); 1347 freeme = NULL; 1348 NET_UNLOCK(); 1349 goto ret; 1350 } 1351 import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]); 1352 import_rdomain(newsa, headers[SADB_X_EXT_RDOMAIN]); 1353 #if NPF > 0 1354 import_tag(newsa, headers[SADB_X_EXT_TAG]); 1355 import_tap(newsa, headers[SADB_X_EXT_TAP]); 1356 #endif 1357 1358 /* Exclude sensitive data from reply message. */ 1359 headers[SADB_EXT_KEY_AUTH] = NULL; 1360 headers[SADB_EXT_KEY_ENCRYPT] = NULL; 1361 headers[SADB_X_EXT_LOCAL_AUTH] = NULL; 1362 headers[SADB_X_EXT_REMOTE_AUTH] = NULL; 1363 1364 newsa->tdb_seq = smsg->sadb_msg_seq; 1365 1366 rval = tdb_init(newsa, alg, &ii); 1367 if (rval) { 1368 rval = EINVAL; 1369 tdb_free(freeme); 1370 freeme = NULL; 1371 NET_UNLOCK(); 1372 goto ret; 1373 } 1374 1375 newsa->tdb_cur_allocations = sa2->tdb_cur_allocations; 1376 1377 /* Delete old version of the SA, insert new one */ 1378 tdb_delete(sa2); 1379 puttdb((struct tdb *) freeme); 1380 sa2 = freeme = NULL; 1381 } else { 1382 /* 1383 * The SA is already initialized, so we're only allowed to 1384 * change lifetimes and some other information; we're 1385 * not allowed to change keys, addresses or identities. 1386 */ 1387 if (headers[SADB_EXT_KEY_AUTH] || 1388 headers[SADB_EXT_KEY_ENCRYPT] || 1389 headers[SADB_EXT_IDENTITY_SRC] || 1390 headers[SADB_EXT_IDENTITY_DST] || 1391 headers[SADB_EXT_SENSITIVITY]) { 1392 rval = EINVAL; 1393 NET_UNLOCK(); 1394 goto ret; 1395 } 1396 1397 import_sa(sa2, headers[SADB_EXT_SA], NULL); 1398 import_lifetime(sa2, 1399 headers[SADB_EXT_LIFETIME_CURRENT], 1400 PFKEYV2_LIFETIME_CURRENT); 1401 import_lifetime(sa2, headers[SADB_EXT_LIFETIME_SOFT], 1402 PFKEYV2_LIFETIME_SOFT); 1403 import_lifetime(sa2, headers[SADB_EXT_LIFETIME_HARD], 1404 PFKEYV2_LIFETIME_HARD); 1405 import_udpencap(sa2, headers[SADB_X_EXT_UDPENCAP]); 1406 #if NPF > 0 1407 import_tag(sa2, headers[SADB_X_EXT_TAG]); 1408 import_tap(sa2, headers[SADB_X_EXT_TAP]); 1409 #endif 1410 if (headers[SADB_EXT_ADDRESS_SRC] || 1411 headers[SADB_EXT_ADDRESS_PROXY]) { 1412 tdb_unlink(sa2); 1413 import_address((struct sockaddr *)&sa2->tdb_src, 1414 headers[SADB_EXT_ADDRESS_SRC]); 1415 import_address((struct sockaddr *)&sa2->tdb_dst, 1416 headers[SADB_EXT_ADDRESS_PROXY]); 1417 puttdb(sa2); 1418 } 1419 } 1420 NET_UNLOCK(); 1421 1422 break; 1423 case SADB_ADD: 1424 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1425 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] + 1426 sizeof(struct sadb_address)); 1427 1428 /* Either all or none of the flow must be included */ 1429 if ((headers[SADB_X_EXT_SRC_FLOW] || 1430 headers[SADB_X_EXT_PROTOCOL] || 1431 headers[SADB_X_EXT_FLOW_TYPE] || 1432 headers[SADB_X_EXT_DST_FLOW] || 1433 headers[SADB_X_EXT_SRC_MASK] || 1434 headers[SADB_X_EXT_DST_MASK]) && 1435 !(headers[SADB_X_EXT_SRC_FLOW] && 1436 headers[SADB_X_EXT_PROTOCOL] && 1437 headers[SADB_X_EXT_FLOW_TYPE] && 1438 headers[SADB_X_EXT_DST_FLOW] && 1439 headers[SADB_X_EXT_SRC_MASK] && 1440 headers[SADB_X_EXT_DST_MASK])) { 1441 rval = EINVAL; 1442 goto ret; 1443 } 1444 #ifdef IPSEC 1445 /* UDP encap has to be enabled and is only supported for ESP */ 1446 if (headers[SADB_X_EXT_UDPENCAP] && 1447 (!udpencap_enable || 1448 smsg->sadb_msg_satype != SADB_SATYPE_ESP)) { 1449 rval = EINVAL; 1450 goto ret; 1451 } 1452 #endif /* IPSEC */ 1453 1454 NET_LOCK(); 1455 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1456 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1457 1458 /* We can't add an existing SA! */ 1459 if (sa2 != NULL) { 1460 rval = EEXIST; 1461 NET_UNLOCK(); 1462 goto ret; 1463 } 1464 1465 /* We can only add "mature" SAs */ 1466 if (ssa->sadb_sa_state != SADB_SASTATE_MATURE) { 1467 rval = EINVAL; 1468 NET_UNLOCK(); 1469 goto ret; 1470 } 1471 1472 /* Allocate and initialize new TDB */ 1473 freeme_sz = 0; 1474 freeme = tdb_alloc(rdomain); 1475 1476 { 1477 struct tdb *newsa = (struct tdb *) freeme; 1478 struct ipsecinit ii; 1479 int alg; 1480 1481 bzero(&ii, sizeof(struct ipsecinit)); 1482 1483 newsa->tdb_satype = smsg->sadb_msg_satype; 1484 if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype, 1485 &newsa->tdb_sproto, &alg))) { 1486 tdb_free(freeme); 1487 freeme = NULL; 1488 NET_UNLOCK(); 1489 goto ret; 1490 } 1491 1492 import_sa(newsa, headers[SADB_EXT_SA], &ii); 1493 import_address(&newsa->tdb_src.sa, 1494 headers[SADB_EXT_ADDRESS_SRC]); 1495 import_address(&newsa->tdb_dst.sa, 1496 headers[SADB_EXT_ADDRESS_DST]); 1497 1498 import_lifetime(newsa, 1499 headers[SADB_EXT_LIFETIME_CURRENT], 1500 PFKEYV2_LIFETIME_CURRENT); 1501 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT], 1502 PFKEYV2_LIFETIME_SOFT); 1503 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD], 1504 PFKEYV2_LIFETIME_HARD); 1505 1506 import_key(&ii, headers[SADB_EXT_KEY_AUTH], 1507 PFKEYV2_AUTHENTICATION_KEY); 1508 import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT], 1509 PFKEYV2_ENCRYPTION_KEY); 1510 1511 import_identities(&newsa->tdb_ids, 1512 newsa->tdb_ids_swapped, 1513 headers[SADB_EXT_IDENTITY_SRC], 1514 headers[SADB_EXT_IDENTITY_DST]); 1515 1516 if ((rval = import_flow(&newsa->tdb_filter, 1517 &newsa->tdb_filtermask, 1518 headers[SADB_X_EXT_SRC_FLOW], 1519 headers[SADB_X_EXT_SRC_MASK], 1520 headers[SADB_X_EXT_DST_FLOW], 1521 headers[SADB_X_EXT_DST_MASK], 1522 headers[SADB_X_EXT_PROTOCOL], 1523 headers[SADB_X_EXT_FLOW_TYPE]))) { 1524 tdb_free(freeme); 1525 freeme = NULL; 1526 NET_UNLOCK(); 1527 goto ret; 1528 } 1529 import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]); 1530 import_rdomain(newsa, headers[SADB_X_EXT_RDOMAIN]); 1531 #if NPF > 0 1532 import_tag(newsa, headers[SADB_X_EXT_TAG]); 1533 import_tap(newsa, headers[SADB_X_EXT_TAP]); 1534 #endif 1535 1536 /* Exclude sensitive data from reply message. */ 1537 headers[SADB_EXT_KEY_AUTH] = NULL; 1538 headers[SADB_EXT_KEY_ENCRYPT] = NULL; 1539 headers[SADB_X_EXT_LOCAL_AUTH] = NULL; 1540 headers[SADB_X_EXT_REMOTE_AUTH] = NULL; 1541 1542 newsa->tdb_seq = smsg->sadb_msg_seq; 1543 1544 rval = tdb_init(newsa, alg, &ii); 1545 if (rval) { 1546 rval = EINVAL; 1547 tdb_free(freeme); 1548 freeme = NULL; 1549 NET_UNLOCK(); 1550 goto ret; 1551 } 1552 } 1553 1554 /* Add TDB in table */ 1555 puttdb((struct tdb *) freeme); 1556 NET_UNLOCK(); 1557 1558 freeme = NULL; 1559 break; 1560 1561 case SADB_DELETE: 1562 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1563 sunionp = 1564 (union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] + 1565 sizeof(struct sadb_address)); 1566 1567 NET_LOCK(); 1568 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1569 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1570 if (sa2 == NULL) { 1571 rval = ESRCH; 1572 NET_UNLOCK(); 1573 goto ret; 1574 } 1575 1576 tdb_delete(sa2); 1577 NET_UNLOCK(); 1578 1579 sa2 = NULL; 1580 break; 1581 1582 case SADB_X_ASKPOLICY: 1583 /* Get the relevant policy */ 1584 NET_LOCK(); 1585 ipa = ipsec_get_acquire(((struct sadb_x_policy *) headers[SADB_X_EXT_POLICY])->sadb_x_policy_seq); 1586 if (ipa == NULL) { 1587 rval = ESRCH; 1588 NET_UNLOCK(); 1589 goto ret; 1590 } 1591 1592 rval = pfkeyv2_policy(ipa, headers, &freeme, &freeme_sz); 1593 NET_UNLOCK(); 1594 if (rval) 1595 mode = PFKEYV2_SENDMESSAGE_UNICAST; 1596 1597 break; 1598 1599 case SADB_GET: 1600 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1601 sunionp = 1602 (union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] + 1603 sizeof(struct sadb_address)); 1604 1605 NET_LOCK(); 1606 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1607 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1608 if (sa2 == NULL) { 1609 rval = ESRCH; 1610 NET_UNLOCK(); 1611 goto ret; 1612 } 1613 1614 rval = pfkeyv2_get(sa2, headers, &freeme, &freeme_sz, NULL); 1615 NET_UNLOCK(); 1616 if (rval) 1617 mode = PFKEYV2_SENDMESSAGE_UNICAST; 1618 1619 break; 1620 1621 case SADB_REGISTER: 1622 s = keylock(kp); 1623 if (!(kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED)) { 1624 kp->kcb_flags |= PFKEYV2_SOCKETFLAGS_REGISTERED; 1625 mtx_enter(&pfkeyv2_mtx); 1626 nregistered++; 1627 mtx_leave(&pfkeyv2_mtx); 1628 } 1629 keyunlock(kp, s); 1630 1631 freeme_sz = sizeof(struct sadb_supported) + sizeof(ealgs); 1632 if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT | M_ZERO))) { 1633 rval = ENOMEM; 1634 goto ret; 1635 } 1636 1637 ssup = (struct sadb_supported *) freeme; 1638 ssup->sadb_supported_len = freeme_sz / sizeof(uint64_t); 1639 1640 { 1641 void *p = freeme + sizeof(struct sadb_supported); 1642 1643 bcopy(&ealgs[0], p, sizeof(ealgs)); 1644 } 1645 1646 headers[SADB_EXT_SUPPORTED_ENCRYPT] = freeme; 1647 1648 freeme2_sz = sizeof(struct sadb_supported) + sizeof(aalgs); 1649 if (!(freeme2 = malloc(freeme2_sz, M_PFKEY, 1650 M_NOWAIT | M_ZERO))) { 1651 rval = ENOMEM; 1652 goto ret; 1653 } 1654 1655 /* Keep track what this socket has registered for */ 1656 s = keylock(kp); 1657 kp->kcb_reg |= 1658 (1 << ((struct sadb_msg *)message)->sadb_msg_satype); 1659 keyunlock(kp, s); 1660 1661 ssup = (struct sadb_supported *) freeme2; 1662 ssup->sadb_supported_len = freeme2_sz / sizeof(uint64_t); 1663 1664 { 1665 void *p = freeme2 + sizeof(struct sadb_supported); 1666 1667 bcopy(&aalgs[0], p, sizeof(aalgs)); 1668 } 1669 1670 headers[SADB_EXT_SUPPORTED_AUTH] = freeme2; 1671 1672 freeme3_sz = sizeof(struct sadb_supported) + sizeof(calgs); 1673 if (!(freeme3 = malloc(freeme3_sz, M_PFKEY, 1674 M_NOWAIT | M_ZERO))) { 1675 rval = ENOMEM; 1676 goto ret; 1677 } 1678 1679 ssup = (struct sadb_supported *) freeme3; 1680 ssup->sadb_supported_len = freeme3_sz / sizeof(uint64_t); 1681 1682 { 1683 void *p = freeme3 + sizeof(struct sadb_supported); 1684 1685 bcopy(&calgs[0], p, sizeof(calgs)); 1686 } 1687 1688 headers[SADB_X_EXT_SUPPORTED_COMP] = freeme3; 1689 1690 break; 1691 1692 case SADB_ACQUIRE: 1693 case SADB_EXPIRE: 1694 /* Nothing to handle */ 1695 rval = 0; 1696 break; 1697 1698 case SADB_FLUSH: 1699 rval = 0; 1700 1701 NET_LOCK(); 1702 switch (smsg->sadb_msg_satype) { 1703 case SADB_SATYPE_UNSPEC: 1704 spd_table_walk(rdomain, pfkeyv2_policy_flush, NULL); 1705 /* FALLTHROUGH */ 1706 case SADB_SATYPE_AH: 1707 case SADB_SATYPE_ESP: 1708 case SADB_X_SATYPE_IPIP: 1709 case SADB_X_SATYPE_IPCOMP: 1710 #ifdef TCP_SIGNATURE 1711 case SADB_X_SATYPE_TCPSIGNATURE: 1712 #endif /* TCP_SIGNATURE */ 1713 tdb_walk(rdomain, pfkeyv2_sa_flush, 1714 (u_int8_t *) &(smsg->sadb_msg_satype)); 1715 1716 break; 1717 1718 default: 1719 rval = EINVAL; /* Unknown/unsupported type */ 1720 } 1721 NET_UNLOCK(); 1722 1723 break; 1724 1725 case SADB_DUMP: 1726 { 1727 struct dump_state dump_state; 1728 dump_state.sadb_msg = (struct sadb_msg *) headers[0]; 1729 dump_state.socket = so; 1730 1731 NET_LOCK(); 1732 rval = tdb_walk(rdomain, pfkeyv2_dump_walker, &dump_state); 1733 NET_UNLOCK(); 1734 if (!rval) 1735 goto realret; 1736 if ((rval == ENOMEM) || (rval == ENOBUFS)) 1737 rval = 0; 1738 } 1739 break; 1740 1741 case SADB_X_GRPSPIS: 1742 { 1743 struct tdb *tdb1, *tdb2, *tdb3; 1744 struct sadb_protocol *sa_proto; 1745 1746 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1747 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] + 1748 sizeof(struct sadb_address)); 1749 1750 NET_LOCK(); 1751 tdb1 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1752 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1753 if (tdb1 == NULL) { 1754 rval = ESRCH; 1755 NET_UNLOCK(); 1756 goto ret; 1757 } 1758 1759 ssa = (struct sadb_sa *) headers[SADB_X_EXT_SA2]; 1760 sunionp = (union sockaddr_union *) (headers[SADB_X_EXT_DST2] + 1761 sizeof(struct sadb_address)); 1762 sa_proto = (struct sadb_protocol *) headers[SADB_X_EXT_SATYPE2]; 1763 1764 /* optionally fetch tdb2 from rdomain2 */ 1765 tdb2 = gettdb(srdomain ? srdomain->sadb_x_rdomain_dom2 : rdomain, 1766 ssa->sadb_sa_spi, sunionp, 1767 SADB_X_GETSPROTO(sa_proto->sadb_protocol_proto)); 1768 if (tdb2 == NULL) { 1769 rval = ESRCH; 1770 NET_UNLOCK(); 1771 goto ret; 1772 } 1773 1774 /* Detect cycles */ 1775 for (tdb3 = tdb2; tdb3; tdb3 = tdb3->tdb_onext) 1776 if (tdb3 == tdb1) { 1777 rval = ESRCH; 1778 NET_UNLOCK(); 1779 goto ret; 1780 } 1781 1782 /* Maintenance */ 1783 if ((tdb1->tdb_onext) && 1784 (tdb1->tdb_onext->tdb_inext == tdb1)) 1785 tdb1->tdb_onext->tdb_inext = NULL; 1786 1787 if ((tdb2->tdb_inext) && 1788 (tdb2->tdb_inext->tdb_onext == tdb2)) 1789 tdb2->tdb_inext->tdb_onext = NULL; 1790 1791 /* Link them */ 1792 tdb1->tdb_onext = tdb2; 1793 tdb2->tdb_inext = tdb1; 1794 NET_UNLOCK(); 1795 } 1796 break; 1797 1798 case SADB_X_DELFLOW: 1799 delflag = 1; 1800 /*FALLTHROUGH*/ 1801 case SADB_X_ADDFLOW: 1802 { 1803 struct sadb_protocol *sab; 1804 union sockaddr_union *ssrc; 1805 int exists = 0; 1806 1807 NET_LOCK(); 1808 if ((rnh = spd_table_add(rdomain)) == NULL) { 1809 rval = ENOMEM; 1810 NET_UNLOCK(); 1811 goto ret; 1812 } 1813 1814 sab = (struct sadb_protocol *) headers[SADB_X_EXT_FLOW_TYPE]; 1815 1816 if ((sab->sadb_protocol_direction != IPSP_DIRECTION_IN) && 1817 (sab->sadb_protocol_direction != IPSP_DIRECTION_OUT)) { 1818 rval = EINVAL; 1819 NET_UNLOCK(); 1820 goto ret; 1821 } 1822 1823 /* If the security protocol wasn't specified, pretend it was ESP */ 1824 if (smsg->sadb_msg_satype == 0) 1825 smsg->sadb_msg_satype = SADB_SATYPE_ESP; 1826 1827 if (headers[SADB_EXT_ADDRESS_DST]) 1828 sunionp = (union sockaddr_union *) 1829 (headers[SADB_EXT_ADDRESS_DST] + 1830 sizeof(struct sadb_address)); 1831 else 1832 sunionp = NULL; 1833 1834 if (headers[SADB_EXT_ADDRESS_SRC]) 1835 ssrc = (union sockaddr_union *) 1836 (headers[SADB_EXT_ADDRESS_SRC] + 1837 sizeof(struct sadb_address)); 1838 else 1839 ssrc = NULL; 1840 1841 if ((rval = import_flow(&encapdst, &encapnetmask, 1842 headers[SADB_X_EXT_SRC_FLOW], headers[SADB_X_EXT_SRC_MASK], 1843 headers[SADB_X_EXT_DST_FLOW], headers[SADB_X_EXT_DST_MASK], 1844 headers[SADB_X_EXT_PROTOCOL], 1845 headers[SADB_X_EXT_FLOW_TYPE]))) { 1846 NET_UNLOCK(); 1847 goto ret; 1848 } 1849 1850 /* Determine whether the exact same SPD entry already exists. */ 1851 if ((rn = rn_match(&encapdst, rnh)) != NULL) { 1852 ipo = (struct ipsec_policy *)rn; 1853 1854 /* Verify that the entry is identical */ 1855 if (bcmp(&ipo->ipo_addr, &encapdst, 1856 sizeof(struct sockaddr_encap)) || 1857 bcmp(&ipo->ipo_mask, &encapnetmask, 1858 sizeof(struct sockaddr_encap))) 1859 ipo = NULL; /* Fall through */ 1860 else 1861 exists = 1; 1862 } else 1863 ipo = NULL; 1864 1865 /* 1866 * If the existing policy is static, only delete or update 1867 * it if the new one is also static. 1868 */ 1869 if (exists && (ipo->ipo_flags & IPSP_POLICY_STATIC)) { 1870 if (!(sab->sadb_protocol_flags & 1871 SADB_X_POLICYFLAGS_POLICY)) { 1872 NET_UNLOCK(); 1873 goto ret; 1874 } 1875 } 1876 1877 /* Delete ? */ 1878 if (delflag) { 1879 if (exists) { 1880 rval = ipsec_delete_policy(ipo); 1881 NET_UNLOCK(); 1882 goto ret; 1883 } 1884 1885 /* If we were asked to delete something non-existent, error. */ 1886 rval = ESRCH; 1887 NET_UNLOCK(); 1888 break; 1889 } 1890 1891 if (!exists) { 1892 /* Allocate policy entry */ 1893 ipo = pool_get(&ipsec_policy_pool, PR_NOWAIT|PR_ZERO); 1894 if (ipo == NULL) { 1895 rval = ENOMEM; 1896 NET_UNLOCK(); 1897 goto ret; 1898 } 1899 } 1900 1901 switch (sab->sadb_protocol_proto) { 1902 case SADB_X_FLOW_TYPE_USE: 1903 ipo->ipo_type = IPSP_IPSEC_USE; 1904 break; 1905 1906 case SADB_X_FLOW_TYPE_ACQUIRE: 1907 ipo->ipo_type = IPSP_IPSEC_ACQUIRE; 1908 break; 1909 1910 case SADB_X_FLOW_TYPE_REQUIRE: 1911 ipo->ipo_type = IPSP_IPSEC_REQUIRE; 1912 break; 1913 1914 case SADB_X_FLOW_TYPE_DENY: 1915 ipo->ipo_type = IPSP_DENY; 1916 break; 1917 1918 case SADB_X_FLOW_TYPE_BYPASS: 1919 ipo->ipo_type = IPSP_PERMIT; 1920 break; 1921 1922 case SADB_X_FLOW_TYPE_DONTACQ: 1923 ipo->ipo_type = IPSP_IPSEC_DONTACQ; 1924 break; 1925 1926 default: 1927 if (!exists) 1928 pool_put(&ipsec_policy_pool, ipo); 1929 else 1930 ipsec_delete_policy(ipo); 1931 1932 rval = EINVAL; 1933 NET_UNLOCK(); 1934 goto ret; 1935 } 1936 1937 if (sab->sadb_protocol_flags & SADB_X_POLICYFLAGS_POLICY) 1938 ipo->ipo_flags |= IPSP_POLICY_STATIC; 1939 1940 if (sunionp) 1941 bcopy(sunionp, &ipo->ipo_dst, 1942 sizeof(union sockaddr_union)); 1943 else 1944 bzero(&ipo->ipo_dst, sizeof(union sockaddr_union)); 1945 1946 if (ssrc) 1947 bcopy(ssrc, &ipo->ipo_src, 1948 sizeof(union sockaddr_union)); 1949 else 1950 bzero(&ipo->ipo_src, sizeof(union sockaddr_union)); 1951 1952 ipo->ipo_sproto = SADB_X_GETSPROTO(smsg->sadb_msg_satype); 1953 1954 if (ipo->ipo_ids) { 1955 ipsp_ids_free(ipo->ipo_ids); 1956 ipo->ipo_ids = NULL; 1957 } 1958 1959 if ((sid = headers[SADB_EXT_IDENTITY_SRC]) != NULL && 1960 (did = headers[SADB_EXT_IDENTITY_DST]) != NULL) { 1961 import_identities(&ipo->ipo_ids, 0, sid, did); 1962 if (ipo->ipo_ids == NULL) { 1963 if (exists) 1964 ipsec_delete_policy(ipo); 1965 else 1966 pool_put(&ipsec_policy_pool, ipo); 1967 rval = ENOBUFS; 1968 NET_UNLOCK(); 1969 goto ret; 1970 } 1971 } 1972 1973 /* Flow type */ 1974 if (!exists) { 1975 /* Initialize policy entry */ 1976 bcopy(&encapdst, &ipo->ipo_addr, 1977 sizeof(struct sockaddr_encap)); 1978 bcopy(&encapnetmask, &ipo->ipo_mask, 1979 sizeof(struct sockaddr_encap)); 1980 1981 TAILQ_INIT(&ipo->ipo_acquires); 1982 ipo->ipo_rdomain = rdomain; 1983 ipo->ipo_ref_count = 1; 1984 1985 /* Add SPD entry */ 1986 if ((rnh = spd_table_get(rdomain)) == NULL || 1987 (rn = rn_addroute((caddr_t)&ipo->ipo_addr, 1988 (caddr_t)&ipo->ipo_mask, rnh, 1989 ipo->ipo_nodes, 0)) == NULL) { 1990 /* Remove from linked list of policies on TDB */ 1991 if (ipo->ipo_tdb) 1992 TAILQ_REMOVE(&ipo->ipo_tdb->tdb_policy_head, 1993 ipo, ipo_tdb_next); 1994 1995 if (ipo->ipo_ids) 1996 ipsp_ids_free(ipo->ipo_ids); 1997 pool_put(&ipsec_policy_pool, ipo); 1998 NET_UNLOCK(); 1999 goto ret; 2000 } 2001 TAILQ_INSERT_HEAD(&ipsec_policy_head, ipo, ipo_list); 2002 ipsec_in_use++; 2003 /* 2004 * XXXSMP IPsec data structures are not ready to be 2005 * accessed by multiple Network threads in parallel, 2006 * so force all packets to be processed by the first 2007 * one. 2008 */ 2009 extern int nettaskqs; 2010 nettaskqs = 1; 2011 } else { 2012 ipo->ipo_last_searched = ipo->ipo_flags = 0; 2013 } 2014 NET_UNLOCK(); 2015 } 2016 break; 2017 2018 case SADB_X_PROMISC: 2019 if (len >= 2 * sizeof(struct sadb_msg)) { 2020 struct mbuf *packet; 2021 2022 if ((rval = pfdatatopacket(message, len, &packet)) != 0) 2023 goto ret; 2024 2025 SRPL_FOREACH(bkp, &sr, &pkptable.pkp_list, kcb_list) { 2026 if (bkp == kp || bkp->kcb_rdomain != kp->kcb_rdomain) 2027 continue; 2028 2029 if (!smsg->sadb_msg_seq || 2030 (smsg->sadb_msg_seq == kp->kcb_pid)) { 2031 s = keylock(bkp); 2032 pfkey_sendup(bkp, packet, 1); 2033 keyunlock(bkp, s); 2034 } 2035 } 2036 SRPL_LEAVE(&sr); 2037 2038 m_freem(packet); 2039 } else { 2040 if (len != sizeof(struct sadb_msg)) { 2041 rval = EINVAL; 2042 goto ret; 2043 } 2044 2045 s = keylock(kp); 2046 i = (kp->kcb_flags & 2047 PFKEYV2_SOCKETFLAGS_PROMISC) ? 1 : 0; 2048 j = smsg->sadb_msg_satype ? 1 : 0; 2049 2050 if (i ^ j) { 2051 if (j) { 2052 kp->kcb_flags |= 2053 PFKEYV2_SOCKETFLAGS_PROMISC; 2054 mtx_enter(&pfkeyv2_mtx); 2055 npromisc++; 2056 mtx_leave(&pfkeyv2_mtx); 2057 } else { 2058 kp->kcb_flags &= 2059 ~PFKEYV2_SOCKETFLAGS_PROMISC; 2060 mtx_enter(&pfkeyv2_mtx); 2061 npromisc--; 2062 mtx_leave(&pfkeyv2_mtx); 2063 } 2064 } 2065 keyunlock(kp, s); 2066 } 2067 2068 break; 2069 2070 default: 2071 rval = EINVAL; 2072 goto ret; 2073 } 2074 2075 ret: 2076 if (rval) { 2077 if ((rval == EINVAL) || (rval == ENOMEM) || (rval == ENOBUFS)) 2078 goto realret; 2079 2080 for (i = 1; i <= SADB_EXT_MAX; i++) 2081 headers[i] = NULL; 2082 2083 smsg->sadb_msg_errno = abs(rval); 2084 } else { 2085 uint64_t seen = 0LL; 2086 2087 for (i = 1; i <= SADB_EXT_MAX; i++) 2088 if (headers[i]) 2089 seen |= (1LL << i); 2090 2091 if ((seen & sadb_exts_allowed_out[smsg->sadb_msg_type]) 2092 != seen) { 2093 rval = EPERM; 2094 goto realret; 2095 } 2096 2097 if ((seen & sadb_exts_required_out[smsg->sadb_msg_type]) != 2098 sadb_exts_required_out[smsg->sadb_msg_type]) { 2099 rval = EPERM; 2100 goto realret; 2101 } 2102 } 2103 2104 rval = pfkeyv2_sendmessage(headers, mode, so, 0, 0, kp->kcb_rdomain); 2105 2106 realret: 2107 2108 if (freeme != NULL) 2109 explicit_bzero(freeme, freeme_sz); 2110 free(freeme, M_PFKEY, freeme_sz); 2111 free(freeme2, M_PFKEY, freeme2_sz); 2112 free(freeme3, M_PFKEY, freeme3_sz); 2113 2114 explicit_bzero(message, len); 2115 free(message, M_PFKEY, len); 2116 2117 free(sa1, M_PFKEY, sizeof(*sa1)); 2118 2119 return (rval); 2120 } 2121 2122 /* 2123 * Send an ACQUIRE message to key management, to get a new SA. 2124 */ 2125 int 2126 pfkeyv2_acquire(struct ipsec_policy *ipo, union sockaddr_union *gw, 2127 union sockaddr_union *laddr, u_int32_t *seq, struct sockaddr_encap *ddst) 2128 { 2129 void *p, *headers[SADB_EXT_MAX + 1], *buffer = NULL; 2130 struct sadb_comb *sadb_comb; 2131 struct sadb_address *sadd; 2132 struct sadb_prop *sa_prop; 2133 struct sadb_msg *smsg; 2134 int rval = 0; 2135 int i, j, registered; 2136 2137 mtx_enter(&pfkeyv2_mtx); 2138 *seq = pfkeyv2_seq++; 2139 2140 registered = nregistered; 2141 mtx_leave(&pfkeyv2_mtx); 2142 2143 if (!registered) { 2144 rval = ESRCH; 2145 goto ret; 2146 } 2147 2148 /* How large a buffer do we need... XXX we only do one proposal for now */ 2149 i = sizeof(struct sadb_msg) + 2150 (laddr == NULL ? 0 : sizeof(struct sadb_address) + 2151 PADUP(ipo->ipo_src.sa.sa_len)) + 2152 sizeof(struct sadb_address) + PADUP(gw->sa.sa_len) + 2153 sizeof(struct sadb_prop) + 1 * sizeof(struct sadb_comb); 2154 2155 if (ipo->ipo_ids) { 2156 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_local->len); 2157 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_remote->len); 2158 } 2159 2160 /* Allocate */ 2161 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 2162 rval = ENOMEM; 2163 goto ret; 2164 } 2165 2166 bzero(headers, sizeof(headers)); 2167 2168 buffer = p; 2169 2170 headers[0] = p; 2171 p += sizeof(struct sadb_msg); 2172 2173 smsg = (struct sadb_msg *) headers[0]; 2174 smsg->sadb_msg_version = PF_KEY_V2; 2175 smsg->sadb_msg_type = SADB_ACQUIRE; 2176 smsg->sadb_msg_len = i / sizeof(uint64_t); 2177 smsg->sadb_msg_seq = *seq; 2178 2179 if (ipo->ipo_sproto == IPPROTO_ESP) 2180 smsg->sadb_msg_satype = SADB_SATYPE_ESP; 2181 else if (ipo->ipo_sproto == IPPROTO_AH) 2182 smsg->sadb_msg_satype = SADB_SATYPE_AH; 2183 else if (ipo->ipo_sproto == IPPROTO_IPCOMP) 2184 smsg->sadb_msg_satype = SADB_X_SATYPE_IPCOMP; 2185 2186 if (laddr) { 2187 headers[SADB_EXT_ADDRESS_SRC] = p; 2188 p += sizeof(struct sadb_address) + PADUP(laddr->sa.sa_len); 2189 sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_SRC]; 2190 sadd->sadb_address_len = (sizeof(struct sadb_address) + 2191 laddr->sa.sa_len + sizeof(uint64_t) - 1) / 2192 sizeof(uint64_t); 2193 bcopy(laddr, headers[SADB_EXT_ADDRESS_SRC] + 2194 sizeof(struct sadb_address), laddr->sa.sa_len); 2195 } 2196 2197 headers[SADB_EXT_ADDRESS_DST] = p; 2198 p += sizeof(struct sadb_address) + PADUP(gw->sa.sa_len); 2199 sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_DST]; 2200 sadd->sadb_address_len = (sizeof(struct sadb_address) + 2201 gw->sa.sa_len + sizeof(uint64_t) - 1) / sizeof(uint64_t); 2202 bcopy(gw, headers[SADB_EXT_ADDRESS_DST] + sizeof(struct sadb_address), 2203 gw->sa.sa_len); 2204 2205 if (ipo->ipo_ids) 2206 export_identities(&p, ipo->ipo_ids, 0, headers); 2207 2208 headers[SADB_EXT_PROPOSAL] = p; 2209 p += sizeof(struct sadb_prop); 2210 sa_prop = (struct sadb_prop *) headers[SADB_EXT_PROPOSAL]; 2211 sa_prop->sadb_prop_num = 1; /* XXX One proposal only */ 2212 sa_prop->sadb_prop_len = (sizeof(struct sadb_prop) + 2213 (sizeof(struct sadb_comb) * sa_prop->sadb_prop_num)) / 2214 sizeof(uint64_t); 2215 2216 sadb_comb = p; 2217 2218 /* XXX Should actually ask the crypto layer what's supported */ 2219 for (j = 0; j < sa_prop->sadb_prop_num; j++) { 2220 sadb_comb->sadb_comb_flags = 0; 2221 #ifdef IPSEC 2222 if (ipsec_require_pfs) 2223 sadb_comb->sadb_comb_flags |= SADB_SAFLAGS_PFS; 2224 2225 /* Set the encryption algorithm */ 2226 if (ipo->ipo_sproto == IPPROTO_ESP) { 2227 if (!strncasecmp(ipsec_def_enc, "aes", 2228 sizeof("aes"))) { 2229 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AES; 2230 sadb_comb->sadb_comb_encrypt_minbits = 128; 2231 sadb_comb->sadb_comb_encrypt_maxbits = 256; 2232 } else if (!strncasecmp(ipsec_def_enc, "aesctr", 2233 sizeof("aesctr"))) { 2234 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AESCTR; 2235 sadb_comb->sadb_comb_encrypt_minbits = 128+32; 2236 sadb_comb->sadb_comb_encrypt_maxbits = 256+32; 2237 } else if (!strncasecmp(ipsec_def_enc, "3des", 2238 sizeof("3des"))) { 2239 sadb_comb->sadb_comb_encrypt = SADB_EALG_3DESCBC; 2240 sadb_comb->sadb_comb_encrypt_minbits = 192; 2241 sadb_comb->sadb_comb_encrypt_maxbits = 192; 2242 } else if (!strncasecmp(ipsec_def_enc, "blowfish", 2243 sizeof("blowfish"))) { 2244 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_BLF; 2245 sadb_comb->sadb_comb_encrypt_minbits = 40; 2246 sadb_comb->sadb_comb_encrypt_maxbits = BLF_MAXKEYLEN * 8; 2247 } else if (!strncasecmp(ipsec_def_enc, "cast128", 2248 sizeof("cast128"))) { 2249 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_CAST; 2250 sadb_comb->sadb_comb_encrypt_minbits = 40; 2251 sadb_comb->sadb_comb_encrypt_maxbits = 128; 2252 } 2253 } else if (ipo->ipo_sproto == IPPROTO_IPCOMP) { 2254 /* Set the compression algorithm */ 2255 if (!strncasecmp(ipsec_def_comp, "deflate", 2256 sizeof("deflate"))) { 2257 sadb_comb->sadb_comb_encrypt = SADB_X_CALG_DEFLATE; 2258 sadb_comb->sadb_comb_encrypt_minbits = 0; 2259 sadb_comb->sadb_comb_encrypt_maxbits = 0; 2260 } else if (!strncasecmp(ipsec_def_comp, "lzs", 2261 sizeof("lzs"))) { 2262 sadb_comb->sadb_comb_encrypt = SADB_X_CALG_LZS; 2263 sadb_comb->sadb_comb_encrypt_minbits = 0; 2264 sadb_comb->sadb_comb_encrypt_maxbits = 0; 2265 } 2266 } 2267 2268 /* Set the authentication algorithm */ 2269 if (!strncasecmp(ipsec_def_auth, "hmac-sha1", 2270 sizeof("hmac-sha1"))) { 2271 sadb_comb->sadb_comb_auth = SADB_AALG_SHA1HMAC; 2272 sadb_comb->sadb_comb_auth_minbits = 160; 2273 sadb_comb->sadb_comb_auth_maxbits = 160; 2274 } else if (!strncasecmp(ipsec_def_auth, "hmac-ripemd160", 2275 sizeof("hmac_ripemd160"))) { 2276 sadb_comb->sadb_comb_auth = SADB_X_AALG_RIPEMD160HMAC; 2277 sadb_comb->sadb_comb_auth_minbits = 160; 2278 sadb_comb->sadb_comb_auth_maxbits = 160; 2279 } else if (!strncasecmp(ipsec_def_auth, "hmac-md5", 2280 sizeof("hmac-md5"))) { 2281 sadb_comb->sadb_comb_auth = SADB_AALG_MD5HMAC; 2282 sadb_comb->sadb_comb_auth_minbits = 128; 2283 sadb_comb->sadb_comb_auth_maxbits = 128; 2284 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-256", 2285 sizeof("hmac-sha2-256"))) { 2286 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_256; 2287 sadb_comb->sadb_comb_auth_minbits = 256; 2288 sadb_comb->sadb_comb_auth_maxbits = 256; 2289 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-384", 2290 sizeof("hmac-sha2-384"))) { 2291 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_384; 2292 sadb_comb->sadb_comb_auth_minbits = 384; 2293 sadb_comb->sadb_comb_auth_maxbits = 384; 2294 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-512", 2295 sizeof("hmac-sha2-512"))) { 2296 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_512; 2297 sadb_comb->sadb_comb_auth_minbits = 512; 2298 sadb_comb->sadb_comb_auth_maxbits = 512; 2299 } 2300 2301 sadb_comb->sadb_comb_soft_allocations = ipsec_soft_allocations; 2302 sadb_comb->sadb_comb_hard_allocations = ipsec_exp_allocations; 2303 2304 sadb_comb->sadb_comb_soft_bytes = ipsec_soft_bytes; 2305 sadb_comb->sadb_comb_hard_bytes = ipsec_exp_bytes; 2306 2307 sadb_comb->sadb_comb_soft_addtime = ipsec_soft_timeout; 2308 sadb_comb->sadb_comb_hard_addtime = ipsec_exp_timeout; 2309 2310 sadb_comb->sadb_comb_soft_usetime = ipsec_soft_first_use; 2311 sadb_comb->sadb_comb_hard_usetime = ipsec_exp_first_use; 2312 #endif 2313 sadb_comb++; 2314 } 2315 2316 /* Send the ACQUIRE message to all compliant registered listeners. */ 2317 if ((rval = pfkeyv2_sendmessage(headers, 2318 PFKEYV2_SENDMESSAGE_REGISTERED, NULL, smsg->sadb_msg_satype, 0, 2319 ipo->ipo_rdomain)) != 0) 2320 goto ret; 2321 2322 rval = 0; 2323 ret: 2324 if (buffer != NULL) { 2325 explicit_bzero(buffer, i); 2326 free(buffer, M_PFKEY, i); 2327 } 2328 2329 return (rval); 2330 } 2331 2332 /* 2333 * Notify key management that an expiration went off. The second argument 2334 * specifies the type of expiration (soft or hard). 2335 */ 2336 int 2337 pfkeyv2_expire(struct tdb *tdb, u_int16_t type) 2338 { 2339 void *p, *headers[SADB_EXT_MAX+1], *buffer = NULL; 2340 struct sadb_msg *smsg; 2341 int rval = 0; 2342 int i; 2343 2344 switch (tdb->tdb_sproto) { 2345 case IPPROTO_AH: 2346 case IPPROTO_ESP: 2347 case IPPROTO_IPIP: 2348 case IPPROTO_IPCOMP: 2349 #ifdef TCP_SIGNATURE 2350 case IPPROTO_TCP: 2351 #endif /* TCP_SIGNATURE */ 2352 break; 2353 2354 default: 2355 rval = EOPNOTSUPP; 2356 goto ret; 2357 } 2358 2359 i = sizeof(struct sadb_msg) + sizeof(struct sadb_sa) + 2360 2 * sizeof(struct sadb_lifetime) + 2361 sizeof(struct sadb_address) + PADUP(tdb->tdb_src.sa.sa_len) + 2362 sizeof(struct sadb_address) + PADUP(tdb->tdb_dst.sa.sa_len); 2363 2364 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 2365 rval = ENOMEM; 2366 goto ret; 2367 } 2368 2369 bzero(headers, sizeof(headers)); 2370 2371 buffer = p; 2372 2373 headers[0] = p; 2374 p += sizeof(struct sadb_msg); 2375 2376 smsg = (struct sadb_msg *) headers[0]; 2377 smsg->sadb_msg_version = PF_KEY_V2; 2378 smsg->sadb_msg_type = SADB_EXPIRE; 2379 smsg->sadb_msg_satype = tdb->tdb_satype; 2380 smsg->sadb_msg_len = i / sizeof(uint64_t); 2381 2382 mtx_enter(&pfkeyv2_mtx); 2383 smsg->sadb_msg_seq = pfkeyv2_seq++; 2384 mtx_leave(&pfkeyv2_mtx); 2385 2386 headers[SADB_EXT_SA] = p; 2387 export_sa(&p, tdb); 2388 2389 headers[SADB_EXT_LIFETIME_CURRENT] = p; 2390 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_CURRENT); 2391 2392 headers[type] = p; 2393 export_lifetime(&p, tdb, type == SADB_EXT_LIFETIME_SOFT ? 2394 PFKEYV2_LIFETIME_SOFT : PFKEYV2_LIFETIME_HARD); 2395 2396 headers[SADB_EXT_ADDRESS_SRC] = p; 2397 export_address(&p, &tdb->tdb_src.sa); 2398 2399 headers[SADB_EXT_ADDRESS_DST] = p; 2400 export_address(&p, &tdb->tdb_dst.sa); 2401 2402 if ((rval = pfkeyv2_sendmessage(headers, PFKEYV2_SENDMESSAGE_BROADCAST, 2403 NULL, 0, 0, tdb->tdb_rdomain)) != 0) 2404 goto ret; 2405 /* XXX */ 2406 if (tdb->tdb_rdomain != tdb->tdb_rdomain_post) 2407 if ((rval = pfkeyv2_sendmessage(headers, 2408 PFKEYV2_SENDMESSAGE_BROADCAST, NULL, 0, 0, 2409 tdb->tdb_rdomain_post)) != 0) 2410 goto ret; 2411 2412 rval = 0; 2413 2414 ret: 2415 if (buffer != NULL) { 2416 explicit_bzero(buffer, i); 2417 free(buffer, M_PFKEY, i); 2418 } 2419 2420 return (rval); 2421 } 2422 2423 struct pfkeyv2_sysctl_walk { 2424 void *w_where; 2425 size_t w_len; 2426 int w_op; 2427 u_int8_t w_satype; 2428 }; 2429 2430 int 2431 pfkeyv2_sysctl_walker(struct tdb *tdb, void *arg, int last) 2432 { 2433 struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg; 2434 void *buffer = NULL; 2435 int error = 0; 2436 int usedlen, buflen, i; 2437 2438 if (w->w_satype != SADB_SATYPE_UNSPEC && 2439 w->w_satype != tdb->tdb_satype) 2440 return (0); 2441 2442 if (w->w_where) { 2443 void *headers[SADB_EXT_MAX+1]; 2444 struct sadb_msg msg; 2445 2446 bzero(headers, sizeof(headers)); 2447 if ((error = pfkeyv2_get(tdb, headers, &buffer, &buflen, 2448 &usedlen)) != 0) 2449 goto done; 2450 if (w->w_len < sizeof(msg) + usedlen) { 2451 error = ENOMEM; 2452 goto done; 2453 } 2454 /* prepend header */ 2455 bzero(&msg, sizeof(msg)); 2456 msg.sadb_msg_version = PF_KEY_V2; 2457 msg.sadb_msg_satype = tdb->tdb_satype; 2458 msg.sadb_msg_type = SADB_DUMP; 2459 msg.sadb_msg_len = (sizeof(msg) + usedlen) / sizeof(uint64_t); 2460 if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0) 2461 goto done; 2462 w->w_where += sizeof(msg); 2463 w->w_len -= sizeof(msg); 2464 /* set extension type */ 2465 for (i = 1; i <= SADB_EXT_MAX; i++) 2466 if (headers[i]) 2467 ((struct sadb_ext *) 2468 headers[i])->sadb_ext_type = i; 2469 if ((error = copyout(buffer, w->w_where, usedlen)) != 0) 2470 goto done; 2471 w->w_where += usedlen; 2472 w->w_len -= usedlen; 2473 } else { 2474 if ((error = pfkeyv2_get(tdb, NULL, NULL, &buflen, NULL)) != 0) 2475 return (error); 2476 w->w_len += buflen; 2477 w->w_len += sizeof(struct sadb_msg); 2478 } 2479 2480 done: 2481 if (buffer != NULL) { 2482 explicit_bzero(buffer, buflen); 2483 free(buffer, M_PFKEY, buflen); 2484 } 2485 return (error); 2486 } 2487 2488 int 2489 pfkeyv2_dump_policy(struct ipsec_policy *ipo, void **headers, void **buffer, 2490 int *lenp) 2491 { 2492 int i, rval, perm; 2493 void *p; 2494 2495 /* Find how much space we need. */ 2496 i = 2 * sizeof(struct sadb_protocol); 2497 2498 /* We'll need four of them: src, src mask, dst, dst mask. */ 2499 switch (ipo->ipo_addr.sen_type) { 2500 case SENT_IP4: 2501 i += 4 * PADUP(sizeof(struct sockaddr_in)); 2502 i += 4 * sizeof(struct sadb_address); 2503 break; 2504 #ifdef INET6 2505 case SENT_IP6: 2506 i += 4 * PADUP(sizeof(struct sockaddr_in6)); 2507 i += 4 * sizeof(struct sadb_address); 2508 break; 2509 #endif /* INET6 */ 2510 default: 2511 return (EINVAL); 2512 } 2513 2514 /* Local address, might be zeroed. */ 2515 switch (ipo->ipo_src.sa.sa_family) { 2516 case 0: 2517 break; 2518 case AF_INET: 2519 i += PADUP(sizeof(struct sockaddr_in)); 2520 i += sizeof(struct sadb_address); 2521 break; 2522 #ifdef INET6 2523 case AF_INET6: 2524 i += PADUP(sizeof(struct sockaddr_in6)); 2525 i += sizeof(struct sadb_address); 2526 break; 2527 #endif /* INET6 */ 2528 default: 2529 return (EINVAL); 2530 } 2531 2532 /* Remote address, might be zeroed. XXX ??? */ 2533 switch (ipo->ipo_dst.sa.sa_family) { 2534 case 0: 2535 break; 2536 case AF_INET: 2537 i += PADUP(sizeof(struct sockaddr_in)); 2538 i += sizeof(struct sadb_address); 2539 break; 2540 #ifdef INET6 2541 case AF_INET6: 2542 i += PADUP(sizeof(struct sockaddr_in6)); 2543 i += sizeof(struct sadb_address); 2544 break; 2545 #endif /* INET6 */ 2546 default: 2547 return (EINVAL); 2548 } 2549 2550 if (ipo->ipo_ids) { 2551 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_local->len); 2552 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_remote->len); 2553 } 2554 2555 if (lenp) 2556 *lenp = i; 2557 2558 if (buffer == NULL) { 2559 rval = 0; 2560 goto ret; 2561 } 2562 2563 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 2564 rval = ENOMEM; 2565 goto ret; 2566 } else 2567 *buffer = p; 2568 2569 /* Local address. */ 2570 if (ipo->ipo_src.sa.sa_family) { 2571 headers[SADB_EXT_ADDRESS_SRC] = p; 2572 export_address(&p, &ipo->ipo_src.sa); 2573 } 2574 2575 /* Remote address. */ 2576 if (ipo->ipo_dst.sa.sa_family) { 2577 headers[SADB_EXT_ADDRESS_DST] = p; 2578 export_address(&p, &ipo->ipo_dst.sa); 2579 } 2580 2581 /* Get actual flow. */ 2582 export_flow(&p, ipo->ipo_type, &ipo->ipo_addr, &ipo->ipo_mask, 2583 headers); 2584 2585 /* Add ids only when we are root. */ 2586 perm = suser(curproc); 2587 if (perm == 0 && ipo->ipo_ids) 2588 export_identities(&p, ipo->ipo_ids, 0, headers); 2589 2590 rval = 0; 2591 ret: 2592 return (rval); 2593 } 2594 2595 int 2596 pfkeyv2_sysctl_policydumper(struct ipsec_policy *ipo, void *arg, 2597 unsigned int tableid) 2598 { 2599 struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg; 2600 void *buffer = 0; 2601 int i, buflen, error = 0; 2602 2603 if (w->w_where) { 2604 void *headers[SADB_EXT_MAX + 1]; 2605 struct sadb_msg msg; 2606 2607 bzero(headers, sizeof(headers)); 2608 if ((error = pfkeyv2_dump_policy(ipo, headers, &buffer, 2609 &buflen)) != 0) 2610 goto done; 2611 if (w->w_len < buflen) { 2612 error = ENOMEM; 2613 goto done; 2614 } 2615 /* prepend header */ 2616 bzero(&msg, sizeof(msg)); 2617 msg.sadb_msg_version = PF_KEY_V2; 2618 if (ipo->ipo_sproto == IPPROTO_ESP) 2619 msg.sadb_msg_satype = SADB_SATYPE_ESP; 2620 else if (ipo->ipo_sproto == IPPROTO_AH) 2621 msg.sadb_msg_satype = SADB_SATYPE_AH; 2622 else if (ipo->ipo_sproto == IPPROTO_IPCOMP) 2623 msg.sadb_msg_satype = SADB_X_SATYPE_IPCOMP; 2624 else if (ipo->ipo_sproto == IPPROTO_IPIP) 2625 msg.sadb_msg_satype = SADB_X_SATYPE_IPIP; 2626 msg.sadb_msg_type = SADB_X_SPDDUMP; 2627 msg.sadb_msg_len = (sizeof(msg) + buflen) / sizeof(uint64_t); 2628 if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0) 2629 goto done; 2630 w->w_where += sizeof(msg); 2631 w->w_len -= sizeof(msg); 2632 /* set extension type */ 2633 for (i = 1; i <= SADB_EXT_MAX; i++) 2634 if (headers[i]) 2635 ((struct sadb_ext *) 2636 headers[i])->sadb_ext_type = i; 2637 if ((error = copyout(buffer, w->w_where, buflen)) != 0) 2638 goto done; 2639 w->w_where += buflen; 2640 w->w_len -= buflen; 2641 } else { 2642 if ((error = pfkeyv2_dump_policy(ipo, NULL, NULL, 2643 &buflen)) != 0) 2644 goto done; 2645 w->w_len += buflen; 2646 w->w_len += sizeof(struct sadb_msg); 2647 } 2648 2649 done: 2650 if (buffer) 2651 free(buffer, M_PFKEY, buflen); 2652 return (error); 2653 } 2654 2655 int 2656 pfkeyv2_policy_flush(struct ipsec_policy *ipo, void *arg, unsigned int tableid) 2657 { 2658 int error; 2659 2660 error = ipsec_delete_policy(ipo); 2661 if (error == 0) 2662 error = EAGAIN; 2663 2664 return (error); 2665 } 2666 2667 int 2668 pfkeyv2_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 2669 void *new, size_t newlen) 2670 { 2671 struct pfkeyv2_sysctl_walk w; 2672 int error = EINVAL; 2673 u_int rdomain; 2674 u_int tableid; 2675 2676 if (new) 2677 return (EPERM); 2678 if (namelen < 1) 2679 return (EINVAL); 2680 w.w_op = name[0]; 2681 w.w_satype = name[1]; 2682 w.w_where = oldp; 2683 w.w_len = oldp ? *oldlenp : 0; 2684 2685 if (namelen == 3) { 2686 tableid = name[2]; 2687 if (!rtable_exists(tableid)) 2688 return (ENOENT); 2689 } else 2690 tableid = curproc->p_p->ps_rtableid; 2691 rdomain = rtable_l2(tableid); 2692 2693 switch(w.w_op) { 2694 case NET_KEY_SADB_DUMP: 2695 if ((error = suser(curproc)) != 0) 2696 return (error); 2697 NET_LOCK(); 2698 error = tdb_walk(rdomain, pfkeyv2_sysctl_walker, &w); 2699 NET_UNLOCK(); 2700 if (oldp) 2701 *oldlenp = w.w_where - oldp; 2702 else 2703 *oldlenp = w.w_len; 2704 break; 2705 2706 case NET_KEY_SPD_DUMP: 2707 NET_LOCK(); 2708 error = spd_table_walk(rdomain, 2709 pfkeyv2_sysctl_policydumper, &w); 2710 NET_UNLOCK(); 2711 if (oldp) 2712 *oldlenp = w.w_where - oldp; 2713 else 2714 *oldlenp = w.w_len; 2715 break; 2716 } 2717 2718 return (error); 2719 } 2720