1 /* $OpenBSD: pfkeyv2.c,v 1.198 2019/07/17 18:52:46 bluhm Exp $ */ 2 3 /* 4 * @(#)COPYRIGHT 1.1 (NRL) 17 January 1995 5 * 6 * NRL grants permission for redistribution and use in source and binary 7 * forms, with or without modification, of the software and documentation 8 * created at NRL provided that the following conditions are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgements: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * This product includes software developed at the Information 20 * Technology Division, US Naval Research Laboratory. 21 * 4. Neither the name of the NRL nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL AND CONTRIBUTORS ``AS 26 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 28 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NRL OR 29 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 30 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 31 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 32 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * The views and conclusions contained in the software and documentation 38 * are those of the authors and should not be interpreted as representing 39 * official policies, either expressed or implied, of the US Naval 40 * Research Laboratory (NRL). 41 */ 42 43 /* 44 * Copyright (c) 1995, 1996, 1997, 1998, 1999 Craig Metz. All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. Neither the name of the author nor the names of any contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #include "pf.h" 72 73 #include <sys/param.h> 74 #include <sys/socket.h> 75 #include <sys/socketvar.h> 76 #include <sys/protosw.h> 77 #include <sys/domain.h> 78 #include <sys/systm.h> 79 #include <sys/mbuf.h> 80 #include <sys/kernel.h> 81 #include <sys/proc.h> 82 #include <sys/pool.h> 83 #include <sys/mutex.h> 84 85 #include <net/route.h> 86 #include <netinet/ip_ipsp.h> 87 #include <net/pfkeyv2.h> 88 #include <net/radix.h> 89 #include <netinet/ip_ah.h> 90 #include <netinet/ip_esp.h> 91 #include <netinet/ip_ipcomp.h> 92 #include <crypto/blf.h> 93 94 #if NPF > 0 95 #include <net/if.h> 96 #include <net/pfvar.h> 97 #endif 98 99 #define PFKEYSNDQ 8192 100 #define PFKEYRCVQ 8192 101 102 static const struct sadb_alg ealgs[] = { 103 { SADB_EALG_NULL, 0, 0, 0 }, 104 { SADB_EALG_3DESCBC, 64, 192, 192 }, 105 { SADB_X_EALG_BLF, 64, 40, BLF_MAXKEYLEN * 8}, 106 { SADB_X_EALG_CAST, 64, 40, 128}, 107 { SADB_X_EALG_AES, 128, 128, 256}, 108 { SADB_X_EALG_AESCTR, 128, 128 + 32, 256 + 32} 109 }; 110 111 static const struct sadb_alg aalgs[] = { 112 { SADB_AALG_SHA1HMAC, 0, 160, 160 }, 113 { SADB_AALG_MD5HMAC, 0, 128, 128 }, 114 { SADB_X_AALG_RIPEMD160HMAC, 0, 160, 160 }, 115 { SADB_X_AALG_SHA2_256, 0, 256, 256 }, 116 { SADB_X_AALG_SHA2_384, 0, 384, 384 }, 117 { SADB_X_AALG_SHA2_512, 0, 512, 512 } 118 }; 119 120 static const struct sadb_alg calgs[] = { 121 { SADB_X_CALG_DEFLATE, 0, 0, 0}, 122 { 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 bzero(buffer, j + sizeof(struct sadb_msg)); 637 free(buffer, M_PFKEY, 0); 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 { 651 union sockaddr_union sunion; 652 struct sadb_protocol *sp; 653 int rval, i, dir; 654 void *p; 655 656 /* Find out how big a buffer we need */ 657 i = 4 * sizeof(struct sadb_address) + sizeof(struct sadb_protocol); 658 bzero(&sunion, sizeof(union sockaddr_union)); 659 660 switch (ipa->ipa_info.sen_type) { 661 case SENT_IP4: 662 i += 4 * PADUP(sizeof(struct sockaddr_in)); 663 sunion.sa.sa_family = AF_INET; 664 sunion.sa.sa_len = sizeof(struct sockaddr_in); 665 dir = ipa->ipa_info.sen_direction; 666 break; 667 668 #ifdef INET6 669 case SENT_IP6: 670 i += 4 * PADUP(sizeof(struct sockaddr_in6)); 671 sunion.sa.sa_family = AF_INET6; 672 sunion.sa.sa_len = sizeof(struct sockaddr_in6); 673 dir = ipa->ipa_info.sen_ip6_direction; 674 break; 675 #endif /* INET6 */ 676 677 default: 678 return (EINVAL); 679 } 680 681 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 682 rval = ENOMEM; 683 goto ret; 684 } else 685 *buffer = p; 686 687 if (dir == IPSP_DIRECTION_OUT) 688 headers[SADB_X_EXT_SRC_FLOW] = p; 689 else 690 headers[SADB_X_EXT_DST_FLOW] = p; 691 switch (sunion.sa.sa_family) { 692 case AF_INET: 693 sunion.sin.sin_addr = ipa->ipa_info.sen_ip_src; 694 sunion.sin.sin_port = ipa->ipa_info.sen_sport; 695 break; 696 697 #ifdef INET6 698 case AF_INET6: 699 sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_src; 700 sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_sport; 701 break; 702 #endif /* INET6 */ 703 } 704 export_address(&p, &sunion.sa); 705 706 if (dir == IPSP_DIRECTION_OUT) 707 headers[SADB_X_EXT_SRC_MASK] = p; 708 else 709 headers[SADB_X_EXT_DST_MASK] = p; 710 switch (sunion.sa.sa_family) { 711 case AF_INET: 712 sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_src; 713 sunion.sin.sin_port = ipa->ipa_mask.sen_sport; 714 break; 715 716 #ifdef INET6 717 case AF_INET6: 718 sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_src; 719 sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_sport; 720 break; 721 #endif /* INET6 */ 722 } 723 export_address(&p, &sunion.sa); 724 725 if (dir == IPSP_DIRECTION_OUT) 726 headers[SADB_X_EXT_DST_FLOW] = p; 727 else 728 headers[SADB_X_EXT_SRC_FLOW] = p; 729 switch (sunion.sa.sa_family) { 730 case AF_INET: 731 sunion.sin.sin_addr = ipa->ipa_info.sen_ip_dst; 732 sunion.sin.sin_port = ipa->ipa_info.sen_dport; 733 break; 734 735 #ifdef INET6 736 case AF_INET6: 737 sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_dst; 738 sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_dport; 739 break; 740 #endif /* INET6 */ 741 } 742 export_address(&p, &sunion.sa); 743 744 if (dir == IPSP_DIRECTION_OUT) 745 headers[SADB_X_EXT_DST_MASK] = p; 746 else 747 headers[SADB_X_EXT_SRC_MASK] = p; 748 switch (sunion.sa.sa_family) { 749 case AF_INET: 750 sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_dst; 751 sunion.sin.sin_port = ipa->ipa_mask.sen_dport; 752 break; 753 754 #ifdef INET6 755 case AF_INET6: 756 sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_dst; 757 sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_dport; 758 break; 759 #endif /* INET6 */ 760 } 761 export_address(&p, &sunion.sa); 762 763 headers[SADB_X_EXT_FLOW_TYPE] = p; 764 sp = p; 765 sp->sadb_protocol_len = sizeof(struct sadb_protocol) / 766 sizeof(u_int64_t); 767 switch (sunion.sa.sa_family) { 768 case AF_INET: 769 if (ipa->ipa_mask.sen_proto) 770 sp->sadb_protocol_proto = ipa->ipa_info.sen_proto; 771 sp->sadb_protocol_direction = ipa->ipa_info.sen_direction; 772 break; 773 774 #ifdef INET6 775 case AF_INET6: 776 if (ipa->ipa_mask.sen_ip6_proto) 777 sp->sadb_protocol_proto = ipa->ipa_info.sen_ip6_proto; 778 sp->sadb_protocol_direction = ipa->ipa_info.sen_ip6_direction; 779 break; 780 #endif /* INET6 */ 781 } 782 783 rval = 0; 784 785 ret: 786 return (rval); 787 } 788 789 /* 790 * Get all the information contained in an SA to a PFKEYV2 message. 791 */ 792 int 793 pfkeyv2_get(struct tdb *tdb, void **headers, void **buffer, int *lenp) 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 NPF > 0 859 if (tdb->tdb_tag) 860 i += sizeof(struct sadb_x_tag) + PADUP(PF_TAG_NAME_SIZE); 861 if (tdb->tdb_tap) 862 i += sizeof(struct sadb_x_tap); 863 #endif 864 865 if (lenp) 866 *lenp = i; 867 868 if (buffer == NULL) { 869 rval = 0; 870 goto ret; 871 } 872 873 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 874 rval = ENOMEM; 875 goto ret; 876 } else 877 *buffer = p; 878 879 headers[SADB_EXT_SA] = p; 880 881 export_sa(&p, tdb); /* Export SA information (mostly flags) */ 882 883 /* Export lifetimes where applicable */ 884 headers[SADB_EXT_LIFETIME_CURRENT] = p; 885 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_CURRENT); 886 887 if (tdb->tdb_soft_allocations || tdb->tdb_soft_bytes || 888 tdb->tdb_soft_first_use || tdb->tdb_soft_timeout) { 889 headers[SADB_EXT_LIFETIME_SOFT] = p; 890 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_SOFT); 891 } 892 893 if (tdb->tdb_exp_allocations || tdb->tdb_exp_bytes || 894 tdb->tdb_exp_first_use || tdb->tdb_exp_timeout) { 895 headers[SADB_EXT_LIFETIME_HARD] = p; 896 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_HARD); 897 } 898 899 if (tdb->tdb_last_used) { 900 headers[SADB_X_EXT_LIFETIME_LASTUSE] = p; 901 export_lifetime(&p, tdb, PFKEYV2_LIFETIME_LASTUSE); 902 } 903 904 /* Export TDB source address */ 905 headers[SADB_EXT_ADDRESS_SRC] = p; 906 export_address(&p, &tdb->tdb_src.sa); 907 908 /* Export TDB destination address */ 909 headers[SADB_EXT_ADDRESS_DST] = p; 910 export_address(&p, &tdb->tdb_dst.sa); 911 912 /* Export source/destination identities, if present */ 913 if (tdb->tdb_ids) 914 export_identities(&p, tdb->tdb_ids, tdb->tdb_ids_swapped, headers); 915 916 /* Export authentication key, if present */ 917 if (tdb->tdb_amxkey) { 918 headers[SADB_EXT_KEY_AUTH] = p; 919 export_key(&p, tdb, PFKEYV2_AUTHENTICATION_KEY); 920 } 921 922 /* Export encryption key, if present */ 923 if (tdb->tdb_emxkey) { 924 headers[SADB_EXT_KEY_ENCRYPT] = p; 925 export_key(&p, tdb, PFKEYV2_ENCRYPTION_KEY); 926 } 927 928 /* Export flow/filter, if present */ 929 if (tdb->tdb_filter.sen_type) 930 export_flow(&p, IPSP_IPSEC_USE, &tdb->tdb_filter, 931 &tdb->tdb_filtermask, headers); 932 933 if (tdb->tdb_onext) { 934 headers[SADB_X_EXT_SA2] = p; 935 export_sa(&p, tdb->tdb_onext); 936 headers[SADB_X_EXT_DST2] = p; 937 export_address(&p, &tdb->tdb_onext->tdb_dst.sa); 938 headers[SADB_X_EXT_SATYPE2] = p; 939 export_satype(&p, tdb->tdb_onext); 940 } 941 942 /* Export UDP encapsulation port, if present */ 943 if (tdb->tdb_udpencap_port) { 944 headers[SADB_X_EXT_UDPENCAP] = p; 945 export_udpencap(&p, tdb); 946 } 947 948 #if NPF > 0 949 /* Export tag information, if present */ 950 if (tdb->tdb_tag) { 951 headers[SADB_X_EXT_TAG] = p; 952 export_tag(&p, tdb); 953 } 954 955 /* Export tap enc(4) device information, if present */ 956 if (tdb->tdb_tap) { 957 headers[SADB_X_EXT_TAP] = p; 958 export_tap(&p, tdb); 959 } 960 #endif 961 962 headers[SADB_X_EXT_COUNTER] = p; 963 export_counter(&p, tdb); 964 965 rval = 0; 966 967 ret: 968 return (rval); 969 } 970 971 /* 972 * Dump a TDB. 973 */ 974 int 975 pfkeyv2_dump_walker(struct tdb *tdb, void *state, int last) 976 { 977 struct dump_state *dump_state = (struct dump_state *) state; 978 void *headers[SADB_EXT_MAX+1], *buffer; 979 int rval; 980 981 /* If not satype was specified, dump all TDBs */ 982 if (!dump_state->sadb_msg->sadb_msg_satype || 983 (tdb->tdb_satype == dump_state->sadb_msg->sadb_msg_satype)) { 984 bzero(headers, sizeof(headers)); 985 headers[0] = (void *) dump_state->sadb_msg; 986 987 /* Get the information from the TDB to a PFKEYv2 message */ 988 if ((rval = pfkeyv2_get(tdb, headers, &buffer, NULL)) != 0) 989 return (rval); 990 991 if (last) 992 ((struct sadb_msg *)headers[0])->sadb_msg_seq = 0; 993 994 /* Send the message to the specified socket */ 995 rval = pfkeyv2_sendmessage(headers, 996 PFKEYV2_SENDMESSAGE_UNICAST, dump_state->socket, 0, 0, 997 tdb->tdb_rdomain); 998 999 free(buffer, M_PFKEY, 0); 1000 if (rval) 1001 return (rval); 1002 } 1003 1004 return (0); 1005 } 1006 1007 /* 1008 * Delete an SA. 1009 */ 1010 int 1011 pfkeyv2_sa_flush(struct tdb *tdb, void *satype_vp, int last) 1012 { 1013 if (!(*((u_int8_t *) satype_vp)) || 1014 tdb->tdb_satype == *((u_int8_t *) satype_vp)) 1015 tdb_delete(tdb); 1016 return (0); 1017 } 1018 1019 /* 1020 * Convert between SATYPEs and IPsec protocols, taking into consideration 1021 * sysctl variables enabling/disabling ESP/AH and the presence of the old 1022 * IPsec transforms. 1023 */ 1024 int 1025 pfkeyv2_get_proto_alg(u_int8_t satype, u_int8_t *sproto, int *alg) 1026 { 1027 switch (satype) { 1028 #ifdef IPSEC 1029 case SADB_SATYPE_AH: 1030 if (!ah_enable) 1031 return (EOPNOTSUPP); 1032 1033 *sproto = IPPROTO_AH; 1034 1035 if(alg != NULL) 1036 *alg = satype = XF_AH; 1037 1038 break; 1039 1040 case SADB_SATYPE_ESP: 1041 if (!esp_enable) 1042 return (EOPNOTSUPP); 1043 1044 *sproto = IPPROTO_ESP; 1045 1046 if(alg != NULL) 1047 *alg = satype = XF_ESP; 1048 1049 break; 1050 1051 case SADB_X_SATYPE_IPIP: 1052 *sproto = IPPROTO_IPIP; 1053 1054 if (alg != NULL) 1055 *alg = XF_IP4; 1056 1057 break; 1058 1059 case SADB_X_SATYPE_IPCOMP: 1060 if (!ipcomp_enable) 1061 return (EOPNOTSUPP); 1062 1063 *sproto = IPPROTO_IPCOMP; 1064 1065 if(alg != NULL) 1066 *alg = satype = XF_IPCOMP; 1067 1068 break; 1069 #endif /* IPSEC */ 1070 #ifdef TCP_SIGNATURE 1071 case SADB_X_SATYPE_TCPSIGNATURE: 1072 *sproto = IPPROTO_TCP; 1073 1074 if (alg != NULL) 1075 *alg = XF_TCPSIGNATURE; 1076 1077 break; 1078 #endif /* TCP_SIGNATURE */ 1079 1080 default: /* Nothing else supported */ 1081 return (EOPNOTSUPP); 1082 } 1083 1084 return (0); 1085 } 1086 1087 /* 1088 * Handle all messages from userland to kernel. 1089 */ 1090 int 1091 pfkeyv2_send(struct socket *so, void *message, int len) 1092 { 1093 int i, j, rval = 0, mode = PFKEYV2_SENDMESSAGE_BROADCAST; 1094 int delflag = 0; 1095 struct sockaddr_encap encapdst, encapnetmask; 1096 struct ipsec_policy *ipo; 1097 struct ipsec_acquire *ipa; 1098 struct radix_node_head *rnh; 1099 struct radix_node *rn = NULL; 1100 struct pkpcb *kp, *bkp; 1101 void *freeme = NULL, *bckptr = NULL; 1102 void *headers[SADB_EXT_MAX + 1]; 1103 union sockaddr_union *sunionp; 1104 struct tdb *sa1 = NULL, *sa2 = NULL; 1105 struct sadb_msg *smsg; 1106 struct sadb_spirange *sprng; 1107 struct sadb_sa *ssa; 1108 struct sadb_supported *ssup; 1109 struct sadb_ident *sid, *did; 1110 struct srp_ref sr; 1111 u_int rdomain; 1112 int promisc, s; 1113 1114 mtx_enter(&pfkeyv2_mtx); 1115 promisc = npromisc; 1116 mtx_leave(&pfkeyv2_mtx); 1117 1118 /* Verify that we received this over a legitimate pfkeyv2 socket */ 1119 bzero(headers, sizeof(headers)); 1120 1121 kp = sotokeycb(so); 1122 if (!kp) { 1123 rval = EINVAL; 1124 goto ret; 1125 } 1126 1127 rdomain = kp->kcb_rdomain; 1128 1129 /* If we have any promiscuous listeners, send them a copy of the message */ 1130 if (promisc) { 1131 struct mbuf *packet; 1132 1133 if (!(freeme = malloc(sizeof(struct sadb_msg) + len, M_PFKEY, 1134 M_NOWAIT))) { 1135 rval = ENOMEM; 1136 goto ret; 1137 } 1138 1139 /* Initialize encapsulating header */ 1140 bzero(freeme, sizeof(struct sadb_msg)); 1141 smsg = (struct sadb_msg *) freeme; 1142 smsg->sadb_msg_version = PF_KEY_V2; 1143 smsg->sadb_msg_type = SADB_X_PROMISC; 1144 smsg->sadb_msg_len = (sizeof(struct sadb_msg) + len) / 1145 sizeof(uint64_t); 1146 smsg->sadb_msg_seq = curproc->p_p->ps_pid; 1147 1148 bcopy(message, freeme + sizeof(struct sadb_msg), len); 1149 1150 /* Convert to mbuf chain */ 1151 if ((rval = pfdatatopacket(freeme, 1152 sizeof(struct sadb_msg) + len, &packet)) != 0) 1153 goto ret; 1154 1155 /* Send to all promiscuous listeners */ 1156 SRPL_FOREACH(bkp, &sr, &pkptable.pkp_list, kcb_list) { 1157 if (bkp->kcb_rdomain != rdomain) 1158 continue; 1159 1160 s = keylock(bkp); 1161 if (bkp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC) 1162 pfkey_sendup(bkp, packet, 1); 1163 keyunlock(bkp, s); 1164 } 1165 SRPL_LEAVE(&sr); 1166 1167 m_freem(packet); 1168 1169 /* Paranoid */ 1170 explicit_bzero(freeme, sizeof(struct sadb_msg) + len); 1171 free(freeme, M_PFKEY, 0); 1172 freeme = NULL; 1173 } 1174 1175 /* Validate message format */ 1176 if ((rval = pfkeyv2_parsemessage(message, len, headers)) != 0) 1177 goto ret; 1178 1179 smsg = (struct sadb_msg *) headers[0]; 1180 switch (smsg->sadb_msg_type) { 1181 case SADB_GETSPI: /* Reserve an SPI */ 1182 sa1 = malloc(sizeof (*sa1), M_PFKEY, M_NOWAIT | M_ZERO); 1183 if (sa1 == NULL) { 1184 rval = ENOMEM; 1185 goto ret; 1186 } 1187 1188 sa1->tdb_satype = smsg->sadb_msg_satype; 1189 if ((rval = pfkeyv2_get_proto_alg(sa1->tdb_satype, 1190 &sa1->tdb_sproto, 0))) 1191 goto ret; 1192 1193 import_address(&sa1->tdb_src.sa, headers[SADB_EXT_ADDRESS_SRC]); 1194 import_address(&sa1->tdb_dst.sa, headers[SADB_EXT_ADDRESS_DST]); 1195 1196 /* Find an unused SA identifier */ 1197 sprng = (struct sadb_spirange *) headers[SADB_EXT_SPIRANGE]; 1198 NET_LOCK(); 1199 sa1->tdb_spi = reserve_spi(rdomain, 1200 sprng->sadb_spirange_min, sprng->sadb_spirange_max, 1201 &sa1->tdb_src, &sa1->tdb_dst, sa1->tdb_sproto, &rval); 1202 if (sa1->tdb_spi == 0) { 1203 NET_UNLOCK(); 1204 goto ret; 1205 } 1206 1207 /* Send a message back telling what the SA (the SPI really) is */ 1208 if (!(freeme = malloc(sizeof(struct sadb_sa), M_PFKEY, 1209 M_NOWAIT | M_ZERO))) { 1210 rval = ENOMEM; 1211 NET_UNLOCK(); 1212 goto ret; 1213 } 1214 1215 headers[SADB_EXT_SPIRANGE] = NULL; 1216 headers[SADB_EXT_SA] = freeme; 1217 bckptr = freeme; 1218 1219 /* We really only care about the SPI, but we'll export the SA */ 1220 export_sa((void **) &bckptr, sa1); 1221 NET_UNLOCK(); 1222 break; 1223 1224 case SADB_UPDATE: 1225 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1226 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] + 1227 sizeof(struct sadb_address)); 1228 1229 /* Either all or none of the flow must be included */ 1230 if ((headers[SADB_X_EXT_SRC_FLOW] || 1231 headers[SADB_X_EXT_PROTOCOL] || 1232 headers[SADB_X_EXT_FLOW_TYPE] || 1233 headers[SADB_X_EXT_DST_FLOW] || 1234 headers[SADB_X_EXT_SRC_MASK] || 1235 headers[SADB_X_EXT_DST_MASK]) && 1236 !(headers[SADB_X_EXT_SRC_FLOW] && 1237 headers[SADB_X_EXT_PROTOCOL] && 1238 headers[SADB_X_EXT_FLOW_TYPE] && 1239 headers[SADB_X_EXT_DST_FLOW] && 1240 headers[SADB_X_EXT_SRC_MASK] && 1241 headers[SADB_X_EXT_DST_MASK])) { 1242 rval = EINVAL; 1243 goto ret; 1244 } 1245 #ifdef IPSEC 1246 /* UDP encap has to be enabled and is only supported for ESP */ 1247 if (headers[SADB_X_EXT_UDPENCAP] && 1248 (!udpencap_enable || 1249 smsg->sadb_msg_satype != SADB_SATYPE_ESP)) { 1250 rval = EINVAL; 1251 goto ret; 1252 } 1253 #endif /* IPSEC */ 1254 1255 /* Find TDB */ 1256 NET_LOCK(); 1257 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1258 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1259 1260 /* If there's no such SA, we're done */ 1261 if (sa2 == NULL) { 1262 rval = ESRCH; 1263 NET_UNLOCK(); 1264 goto ret; 1265 } 1266 1267 /* If this is a reserved SA */ 1268 if (sa2->tdb_flags & TDBF_INVALID) { 1269 struct tdb *newsa; 1270 struct ipsecinit ii; 1271 int alg; 1272 1273 /* Create new TDB */ 1274 freeme = tdb_alloc(rdomain); 1275 bzero(&ii, sizeof(struct ipsecinit)); 1276 1277 newsa = (struct tdb *) freeme; 1278 newsa->tdb_satype = smsg->sadb_msg_satype; 1279 1280 if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype, 1281 &newsa->tdb_sproto, &alg))) { 1282 tdb_free(freeme); 1283 freeme = NULL; 1284 NET_UNLOCK(); 1285 goto ret; 1286 } 1287 1288 /* Initialize SA */ 1289 import_sa(newsa, headers[SADB_EXT_SA], &ii); 1290 import_address(&newsa->tdb_src.sa, 1291 headers[SADB_EXT_ADDRESS_SRC]); 1292 import_address(&newsa->tdb_dst.sa, 1293 headers[SADB_EXT_ADDRESS_DST]); 1294 import_lifetime(newsa, 1295 headers[SADB_EXT_LIFETIME_CURRENT], 1296 PFKEYV2_LIFETIME_CURRENT); 1297 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT], 1298 PFKEYV2_LIFETIME_SOFT); 1299 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD], 1300 PFKEYV2_LIFETIME_HARD); 1301 import_key(&ii, headers[SADB_EXT_KEY_AUTH], 1302 PFKEYV2_AUTHENTICATION_KEY); 1303 import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT], 1304 PFKEYV2_ENCRYPTION_KEY); 1305 newsa->tdb_ids_swapped = 1; /* only on TDB_UPDATE */ 1306 import_identities(&newsa->tdb_ids, 1307 newsa->tdb_ids_swapped, 1308 headers[SADB_EXT_IDENTITY_SRC], 1309 headers[SADB_EXT_IDENTITY_DST]); 1310 import_flow(&newsa->tdb_filter, &newsa->tdb_filtermask, 1311 headers[SADB_X_EXT_SRC_FLOW], 1312 headers[SADB_X_EXT_SRC_MASK], 1313 headers[SADB_X_EXT_DST_FLOW], 1314 headers[SADB_X_EXT_DST_MASK], 1315 headers[SADB_X_EXT_PROTOCOL], 1316 headers[SADB_X_EXT_FLOW_TYPE]); 1317 import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]); 1318 #if NPF > 0 1319 import_tag(newsa, headers[SADB_X_EXT_TAG]); 1320 import_tap(newsa, headers[SADB_X_EXT_TAP]); 1321 #endif 1322 1323 /* Exclude sensitive data from reply message. */ 1324 headers[SADB_EXT_KEY_AUTH] = NULL; 1325 headers[SADB_EXT_KEY_ENCRYPT] = NULL; 1326 headers[SADB_X_EXT_LOCAL_AUTH] = NULL; 1327 headers[SADB_X_EXT_REMOTE_AUTH] = NULL; 1328 1329 newsa->tdb_seq = smsg->sadb_msg_seq; 1330 1331 rval = tdb_init(newsa, alg, &ii); 1332 if (rval) { 1333 rval = EINVAL; 1334 tdb_free(freeme); 1335 freeme = NULL; 1336 NET_UNLOCK(); 1337 goto ret; 1338 } 1339 1340 newsa->tdb_cur_allocations = sa2->tdb_cur_allocations; 1341 1342 /* Delete old version of the SA, insert new one */ 1343 tdb_delete(sa2); 1344 puttdb((struct tdb *) freeme); 1345 sa2 = freeme = NULL; 1346 } else { 1347 /* 1348 * The SA is already initialized, so we're only allowed to 1349 * change lifetimes and some other information; we're 1350 * not allowed to change keys, addresses or identities. 1351 */ 1352 if (headers[SADB_EXT_KEY_AUTH] || 1353 headers[SADB_EXT_KEY_ENCRYPT] || 1354 headers[SADB_EXT_IDENTITY_SRC] || 1355 headers[SADB_EXT_IDENTITY_DST] || 1356 headers[SADB_EXT_SENSITIVITY]) { 1357 rval = EINVAL; 1358 NET_UNLOCK(); 1359 goto ret; 1360 } 1361 1362 import_sa(sa2, headers[SADB_EXT_SA], NULL); 1363 import_lifetime(sa2, 1364 headers[SADB_EXT_LIFETIME_CURRENT], 1365 PFKEYV2_LIFETIME_CURRENT); 1366 import_lifetime(sa2, headers[SADB_EXT_LIFETIME_SOFT], 1367 PFKEYV2_LIFETIME_SOFT); 1368 import_lifetime(sa2, headers[SADB_EXT_LIFETIME_HARD], 1369 PFKEYV2_LIFETIME_HARD); 1370 import_udpencap(sa2, headers[SADB_X_EXT_UDPENCAP]); 1371 #if NPF > 0 1372 import_tag(sa2, headers[SADB_X_EXT_TAG]); 1373 import_tap(sa2, headers[SADB_X_EXT_TAP]); 1374 #endif 1375 if (headers[SADB_EXT_ADDRESS_SRC] || 1376 headers[SADB_EXT_ADDRESS_PROXY]) { 1377 tdb_unlink(sa2); 1378 import_address((struct sockaddr *)&sa2->tdb_src, 1379 headers[SADB_EXT_ADDRESS_SRC]); 1380 import_address((struct sockaddr *)&sa2->tdb_dst, 1381 headers[SADB_EXT_ADDRESS_PROXY]); 1382 puttdb(sa2); 1383 } 1384 } 1385 NET_UNLOCK(); 1386 1387 break; 1388 case SADB_ADD: 1389 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1390 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] + 1391 sizeof(struct sadb_address)); 1392 1393 /* Either all or none of the flow must be included */ 1394 if ((headers[SADB_X_EXT_SRC_FLOW] || 1395 headers[SADB_X_EXT_PROTOCOL] || 1396 headers[SADB_X_EXT_FLOW_TYPE] || 1397 headers[SADB_X_EXT_DST_FLOW] || 1398 headers[SADB_X_EXT_SRC_MASK] || 1399 headers[SADB_X_EXT_DST_MASK]) && 1400 !(headers[SADB_X_EXT_SRC_FLOW] && 1401 headers[SADB_X_EXT_PROTOCOL] && 1402 headers[SADB_X_EXT_FLOW_TYPE] && 1403 headers[SADB_X_EXT_DST_FLOW] && 1404 headers[SADB_X_EXT_SRC_MASK] && 1405 headers[SADB_X_EXT_DST_MASK])) { 1406 rval = EINVAL; 1407 goto ret; 1408 } 1409 #ifdef IPSEC 1410 /* UDP encap has to be enabled and is only supported for ESP */ 1411 if (headers[SADB_X_EXT_UDPENCAP] && 1412 (!udpencap_enable || 1413 smsg->sadb_msg_satype != SADB_SATYPE_ESP)) { 1414 rval = EINVAL; 1415 goto ret; 1416 } 1417 #endif /* IPSEC */ 1418 1419 NET_LOCK(); 1420 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1421 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1422 1423 /* We can't add an existing SA! */ 1424 if (sa2 != NULL) { 1425 rval = EEXIST; 1426 NET_UNLOCK(); 1427 goto ret; 1428 } 1429 1430 /* We can only add "mature" SAs */ 1431 if (ssa->sadb_sa_state != SADB_SASTATE_MATURE) { 1432 rval = EINVAL; 1433 NET_UNLOCK(); 1434 goto ret; 1435 } 1436 1437 /* Allocate and initialize new TDB */ 1438 freeme = tdb_alloc(rdomain); 1439 1440 { 1441 struct tdb *newsa = (struct tdb *) freeme; 1442 struct ipsecinit ii; 1443 int alg; 1444 1445 bzero(&ii, sizeof(struct ipsecinit)); 1446 1447 newsa->tdb_satype = smsg->sadb_msg_satype; 1448 if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype, 1449 &newsa->tdb_sproto, &alg))) { 1450 tdb_free(freeme); 1451 freeme = NULL; 1452 NET_UNLOCK(); 1453 goto ret; 1454 } 1455 1456 import_sa(newsa, headers[SADB_EXT_SA], &ii); 1457 import_address(&newsa->tdb_src.sa, 1458 headers[SADB_EXT_ADDRESS_SRC]); 1459 import_address(&newsa->tdb_dst.sa, 1460 headers[SADB_EXT_ADDRESS_DST]); 1461 1462 import_lifetime(newsa, 1463 headers[SADB_EXT_LIFETIME_CURRENT], 1464 PFKEYV2_LIFETIME_CURRENT); 1465 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT], 1466 PFKEYV2_LIFETIME_SOFT); 1467 import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD], 1468 PFKEYV2_LIFETIME_HARD); 1469 1470 import_key(&ii, headers[SADB_EXT_KEY_AUTH], 1471 PFKEYV2_AUTHENTICATION_KEY); 1472 import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT], 1473 PFKEYV2_ENCRYPTION_KEY); 1474 1475 import_identities(&newsa->tdb_ids, 1476 newsa->tdb_ids_swapped, 1477 headers[SADB_EXT_IDENTITY_SRC], 1478 headers[SADB_EXT_IDENTITY_DST]); 1479 1480 import_flow(&newsa->tdb_filter, &newsa->tdb_filtermask, 1481 headers[SADB_X_EXT_SRC_FLOW], 1482 headers[SADB_X_EXT_SRC_MASK], 1483 headers[SADB_X_EXT_DST_FLOW], 1484 headers[SADB_X_EXT_DST_MASK], 1485 headers[SADB_X_EXT_PROTOCOL], 1486 headers[SADB_X_EXT_FLOW_TYPE]); 1487 import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]); 1488 #if NPF > 0 1489 import_tag(newsa, headers[SADB_X_EXT_TAG]); 1490 import_tap(newsa, headers[SADB_X_EXT_TAP]); 1491 #endif 1492 1493 /* Exclude sensitive data from reply message. */ 1494 headers[SADB_EXT_KEY_AUTH] = NULL; 1495 headers[SADB_EXT_KEY_ENCRYPT] = NULL; 1496 headers[SADB_X_EXT_LOCAL_AUTH] = NULL; 1497 headers[SADB_X_EXT_REMOTE_AUTH] = NULL; 1498 1499 newsa->tdb_seq = smsg->sadb_msg_seq; 1500 1501 rval = tdb_init(newsa, alg, &ii); 1502 if (rval) { 1503 rval = EINVAL; 1504 tdb_free(freeme); 1505 freeme = NULL; 1506 NET_UNLOCK(); 1507 goto ret; 1508 } 1509 } 1510 1511 /* Add TDB in table */ 1512 puttdb((struct tdb *) freeme); 1513 NET_UNLOCK(); 1514 1515 freeme = NULL; 1516 break; 1517 1518 case SADB_DELETE: 1519 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1520 sunionp = 1521 (union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] + 1522 sizeof(struct sadb_address)); 1523 1524 NET_LOCK(); 1525 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1526 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1527 if (sa2 == NULL) { 1528 rval = ESRCH; 1529 NET_UNLOCK(); 1530 goto ret; 1531 } 1532 1533 tdb_delete(sa2); 1534 NET_UNLOCK(); 1535 1536 sa2 = NULL; 1537 break; 1538 1539 case SADB_X_ASKPOLICY: 1540 /* Get the relevant policy */ 1541 NET_LOCK(); 1542 ipa = ipsec_get_acquire(((struct sadb_x_policy *) headers[SADB_X_EXT_POLICY])->sadb_x_policy_seq); 1543 if (ipa == NULL) { 1544 rval = ESRCH; 1545 NET_UNLOCK(); 1546 goto ret; 1547 } 1548 1549 rval = pfkeyv2_policy(ipa, headers, &freeme); 1550 NET_UNLOCK(); 1551 if (rval) 1552 mode = PFKEYV2_SENDMESSAGE_UNICAST; 1553 1554 break; 1555 1556 case SADB_GET: 1557 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1558 sunionp = 1559 (union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] + 1560 sizeof(struct sadb_address)); 1561 1562 NET_LOCK(); 1563 sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1564 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1565 if (sa2 == NULL) { 1566 rval = ESRCH; 1567 NET_UNLOCK(); 1568 goto ret; 1569 } 1570 1571 rval = pfkeyv2_get(sa2, headers, &freeme, NULL); 1572 NET_UNLOCK(); 1573 if (rval) 1574 mode = PFKEYV2_SENDMESSAGE_UNICAST; 1575 1576 break; 1577 1578 case SADB_REGISTER: 1579 s = keylock(kp); 1580 if (!(kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED)) { 1581 kp->kcb_flags |= PFKEYV2_SOCKETFLAGS_REGISTERED; 1582 mtx_enter(&pfkeyv2_mtx); 1583 nregistered++; 1584 mtx_leave(&pfkeyv2_mtx); 1585 } 1586 keyunlock(kp, s); 1587 1588 i = sizeof(struct sadb_supported) + sizeof(ealgs); 1589 1590 if (!(freeme = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 1591 rval = ENOMEM; 1592 goto ret; 1593 } 1594 1595 ssup = (struct sadb_supported *) freeme; 1596 ssup->sadb_supported_len = i / sizeof(uint64_t); 1597 1598 { 1599 void *p = freeme + sizeof(struct sadb_supported); 1600 1601 bcopy(&ealgs[0], p, sizeof(ealgs)); 1602 } 1603 1604 headers[SADB_EXT_SUPPORTED_ENCRYPT] = freeme; 1605 1606 i = sizeof(struct sadb_supported) + sizeof(aalgs); 1607 1608 if (!(freeme = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 1609 rval = ENOMEM; 1610 goto ret; 1611 } 1612 1613 /* Keep track what this socket has registered for */ 1614 s = keylock(kp); 1615 kp->kcb_reg |= 1616 (1 << ((struct sadb_msg *)message)->sadb_msg_satype); 1617 keyunlock(kp, s); 1618 1619 ssup = (struct sadb_supported *) freeme; 1620 ssup->sadb_supported_len = i / sizeof(uint64_t); 1621 1622 { 1623 void *p = freeme + sizeof(struct sadb_supported); 1624 1625 bcopy(&aalgs[0], p, sizeof(aalgs)); 1626 } 1627 1628 headers[SADB_EXT_SUPPORTED_AUTH] = freeme; 1629 1630 i = sizeof(struct sadb_supported) + sizeof(calgs); 1631 1632 if (!(freeme = malloc(i, 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 = i / sizeof(uint64_t); 1639 1640 { 1641 void *p = freeme + sizeof(struct sadb_supported); 1642 1643 bcopy(&calgs[0], p, sizeof(calgs)); 1644 } 1645 1646 headers[SADB_X_EXT_SUPPORTED_COMP] = freeme; 1647 1648 break; 1649 1650 case SADB_ACQUIRE: 1651 case SADB_EXPIRE: 1652 /* Nothing to handle */ 1653 rval = 0; 1654 break; 1655 1656 case SADB_FLUSH: 1657 rval = 0; 1658 1659 NET_LOCK(); 1660 switch (smsg->sadb_msg_satype) { 1661 case SADB_SATYPE_UNSPEC: 1662 spd_table_walk(rdomain, pfkeyv2_policy_flush, NULL); 1663 /* FALLTHROUGH */ 1664 case SADB_SATYPE_AH: 1665 case SADB_SATYPE_ESP: 1666 case SADB_X_SATYPE_IPIP: 1667 case SADB_X_SATYPE_IPCOMP: 1668 #ifdef TCP_SIGNATURE 1669 case SADB_X_SATYPE_TCPSIGNATURE: 1670 #endif /* TCP_SIGNATURE */ 1671 tdb_walk(rdomain, pfkeyv2_sa_flush, 1672 (u_int8_t *) &(smsg->sadb_msg_satype)); 1673 1674 break; 1675 1676 default: 1677 rval = EINVAL; /* Unknown/unsupported type */ 1678 } 1679 NET_UNLOCK(); 1680 1681 break; 1682 1683 case SADB_DUMP: 1684 { 1685 struct dump_state dump_state; 1686 dump_state.sadb_msg = (struct sadb_msg *) headers[0]; 1687 dump_state.socket = so; 1688 1689 NET_LOCK(); 1690 rval = tdb_walk(rdomain, pfkeyv2_dump_walker, &dump_state); 1691 NET_UNLOCK(); 1692 if (!rval) 1693 goto realret; 1694 if ((rval == ENOMEM) || (rval == ENOBUFS)) 1695 rval = 0; 1696 } 1697 break; 1698 1699 case SADB_X_GRPSPIS: 1700 { 1701 struct tdb *tdb1, *tdb2, *tdb3; 1702 struct sadb_protocol *sa_proto; 1703 1704 ssa = (struct sadb_sa *) headers[SADB_EXT_SA]; 1705 sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] + 1706 sizeof(struct sadb_address)); 1707 1708 NET_LOCK(); 1709 tdb1 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1710 SADB_X_GETSPROTO(smsg->sadb_msg_satype)); 1711 if (tdb1 == NULL) { 1712 rval = ESRCH; 1713 NET_UNLOCK(); 1714 goto ret; 1715 } 1716 1717 ssa = (struct sadb_sa *) headers[SADB_X_EXT_SA2]; 1718 sunionp = (union sockaddr_union *) (headers[SADB_X_EXT_DST2] + 1719 sizeof(struct sadb_address)); 1720 sa_proto = (struct sadb_protocol *) headers[SADB_X_EXT_SATYPE2]; 1721 1722 tdb2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp, 1723 SADB_X_GETSPROTO(sa_proto->sadb_protocol_proto)); 1724 if (tdb2 == NULL) { 1725 rval = ESRCH; 1726 NET_UNLOCK(); 1727 goto ret; 1728 } 1729 1730 /* Detect cycles */ 1731 for (tdb3 = tdb2; tdb3; tdb3 = tdb3->tdb_onext) 1732 if (tdb3 == tdb1) { 1733 rval = ESRCH; 1734 NET_UNLOCK(); 1735 goto ret; 1736 } 1737 1738 /* Maintenance */ 1739 if ((tdb1->tdb_onext) && 1740 (tdb1->tdb_onext->tdb_inext == tdb1)) 1741 tdb1->tdb_onext->tdb_inext = NULL; 1742 1743 if ((tdb2->tdb_inext) && 1744 (tdb2->tdb_inext->tdb_onext == tdb2)) 1745 tdb2->tdb_inext->tdb_onext = NULL; 1746 1747 /* Link them */ 1748 tdb1->tdb_onext = tdb2; 1749 tdb2->tdb_inext = tdb1; 1750 NET_UNLOCK(); 1751 } 1752 break; 1753 1754 case SADB_X_DELFLOW: 1755 delflag = 1; 1756 /*FALLTHROUGH*/ 1757 case SADB_X_ADDFLOW: 1758 { 1759 struct sadb_protocol *sab; 1760 union sockaddr_union *ssrc; 1761 int exists = 0; 1762 1763 NET_LOCK(); 1764 if ((rnh = spd_table_add(rdomain)) == NULL) { 1765 rval = ENOMEM; 1766 NET_UNLOCK(); 1767 goto ret; 1768 } 1769 1770 sab = (struct sadb_protocol *) headers[SADB_X_EXT_FLOW_TYPE]; 1771 1772 if ((sab->sadb_protocol_direction != IPSP_DIRECTION_IN) && 1773 (sab->sadb_protocol_direction != IPSP_DIRECTION_OUT)) { 1774 rval = EINVAL; 1775 NET_UNLOCK(); 1776 goto ret; 1777 } 1778 1779 /* If the security protocol wasn't specified, pretend it was ESP */ 1780 if (smsg->sadb_msg_satype == 0) 1781 smsg->sadb_msg_satype = SADB_SATYPE_ESP; 1782 1783 if (headers[SADB_EXT_ADDRESS_DST]) 1784 sunionp = (union sockaddr_union *) 1785 (headers[SADB_EXT_ADDRESS_DST] + 1786 sizeof(struct sadb_address)); 1787 else 1788 sunionp = NULL; 1789 1790 if (headers[SADB_EXT_ADDRESS_SRC]) 1791 ssrc = (union sockaddr_union *) 1792 (headers[SADB_EXT_ADDRESS_SRC] + 1793 sizeof(struct sadb_address)); 1794 else 1795 ssrc = NULL; 1796 1797 import_flow(&encapdst, &encapnetmask, 1798 headers[SADB_X_EXT_SRC_FLOW], headers[SADB_X_EXT_SRC_MASK], 1799 headers[SADB_X_EXT_DST_FLOW], headers[SADB_X_EXT_DST_MASK], 1800 headers[SADB_X_EXT_PROTOCOL], headers[SADB_X_EXT_FLOW_TYPE]); 1801 1802 /* Determine whether the exact same SPD entry already exists. */ 1803 if ((rn = rn_match(&encapdst, rnh)) != NULL) { 1804 ipo = (struct ipsec_policy *)rn; 1805 1806 /* Verify that the entry is identical */ 1807 if (bcmp(&ipo->ipo_addr, &encapdst, 1808 sizeof(struct sockaddr_encap)) || 1809 bcmp(&ipo->ipo_mask, &encapnetmask, 1810 sizeof(struct sockaddr_encap))) 1811 ipo = NULL; /* Fall through */ 1812 else 1813 exists = 1; 1814 } else 1815 ipo = NULL; 1816 1817 /* 1818 * If the existing policy is static, only delete or update 1819 * it if the new one is also static. 1820 */ 1821 if (exists && (ipo->ipo_flags & IPSP_POLICY_STATIC)) { 1822 if (!(sab->sadb_protocol_flags & 1823 SADB_X_POLICYFLAGS_POLICY)) { 1824 NET_UNLOCK(); 1825 goto ret; 1826 } 1827 } 1828 1829 /* Delete ? */ 1830 if (delflag) { 1831 if (exists) { 1832 rval = ipsec_delete_policy(ipo); 1833 NET_UNLOCK(); 1834 goto ret; 1835 } 1836 1837 /* If we were asked to delete something non-existent, error. */ 1838 rval = ESRCH; 1839 NET_UNLOCK(); 1840 break; 1841 } 1842 1843 if (!exists) { 1844 if (ipsec_policy_pool_initialized == 0) { 1845 ipsec_policy_pool_initialized = 1; 1846 pool_init(&ipsec_policy_pool, 1847 sizeof(struct ipsec_policy), 0, 1848 IPL_NONE, 0, "ipsec policy", NULL); 1849 } 1850 1851 /* Allocate policy entry */ 1852 ipo = pool_get(&ipsec_policy_pool, PR_NOWAIT|PR_ZERO); 1853 if (ipo == NULL) { 1854 rval = ENOMEM; 1855 NET_UNLOCK(); 1856 goto ret; 1857 } 1858 } 1859 1860 switch (sab->sadb_protocol_proto) { 1861 case SADB_X_FLOW_TYPE_USE: 1862 ipo->ipo_type = IPSP_IPSEC_USE; 1863 break; 1864 1865 case SADB_X_FLOW_TYPE_ACQUIRE: 1866 ipo->ipo_type = IPSP_IPSEC_ACQUIRE; 1867 break; 1868 1869 case SADB_X_FLOW_TYPE_REQUIRE: 1870 ipo->ipo_type = IPSP_IPSEC_REQUIRE; 1871 break; 1872 1873 case SADB_X_FLOW_TYPE_DENY: 1874 ipo->ipo_type = IPSP_DENY; 1875 break; 1876 1877 case SADB_X_FLOW_TYPE_BYPASS: 1878 ipo->ipo_type = IPSP_PERMIT; 1879 break; 1880 1881 case SADB_X_FLOW_TYPE_DONTACQ: 1882 ipo->ipo_type = IPSP_IPSEC_DONTACQ; 1883 break; 1884 1885 default: 1886 if (!exists) 1887 pool_put(&ipsec_policy_pool, ipo); 1888 else 1889 ipsec_delete_policy(ipo); 1890 1891 rval = EINVAL; 1892 NET_UNLOCK(); 1893 goto ret; 1894 } 1895 1896 if (sab->sadb_protocol_flags & SADB_X_POLICYFLAGS_POLICY) 1897 ipo->ipo_flags |= IPSP_POLICY_STATIC; 1898 1899 if (sunionp) 1900 bcopy(sunionp, &ipo->ipo_dst, 1901 sizeof(union sockaddr_union)); 1902 else 1903 bzero(&ipo->ipo_dst, sizeof(union sockaddr_union)); 1904 1905 if (ssrc) 1906 bcopy(ssrc, &ipo->ipo_src, 1907 sizeof(union sockaddr_union)); 1908 else 1909 bzero(&ipo->ipo_src, sizeof(union sockaddr_union)); 1910 1911 ipo->ipo_sproto = SADB_X_GETSPROTO(smsg->sadb_msg_satype); 1912 1913 if (ipo->ipo_ids) { 1914 ipsp_ids_free(ipo->ipo_ids); 1915 ipo->ipo_ids = NULL; 1916 } 1917 1918 if ((sid = headers[SADB_EXT_IDENTITY_SRC]) != NULL && 1919 (did = headers[SADB_EXT_IDENTITY_DST]) != NULL) { 1920 import_identities(&ipo->ipo_ids, 0, sid, did); 1921 if (ipo->ipo_ids == NULL) { 1922 if (exists) 1923 ipsec_delete_policy(ipo); 1924 else 1925 pool_put(&ipsec_policy_pool, ipo); 1926 rval = ENOBUFS; 1927 NET_UNLOCK(); 1928 goto ret; 1929 } 1930 } 1931 1932 /* Flow type */ 1933 if (!exists) { 1934 /* Initialize policy entry */ 1935 bcopy(&encapdst, &ipo->ipo_addr, 1936 sizeof(struct sockaddr_encap)); 1937 bcopy(&encapnetmask, &ipo->ipo_mask, 1938 sizeof(struct sockaddr_encap)); 1939 1940 TAILQ_INIT(&ipo->ipo_acquires); 1941 ipo->ipo_rdomain = rdomain; 1942 ipo->ipo_ref_count = 1; 1943 1944 /* Add SPD entry */ 1945 if ((rnh = spd_table_get(rdomain)) == NULL || 1946 (rn = rn_addroute((caddr_t)&ipo->ipo_addr, 1947 (caddr_t)&ipo->ipo_mask, rnh, 1948 ipo->ipo_nodes, 0)) == NULL) { 1949 /* Remove from linked list of policies on TDB */ 1950 if (ipo->ipo_tdb) 1951 TAILQ_REMOVE(&ipo->ipo_tdb->tdb_policy_head, 1952 ipo, ipo_tdb_next); 1953 1954 if (ipo->ipo_ids) 1955 ipsp_ids_free(ipo->ipo_ids); 1956 pool_put(&ipsec_policy_pool, ipo); 1957 NET_UNLOCK(); 1958 goto ret; 1959 } 1960 TAILQ_INSERT_HEAD(&ipsec_policy_head, ipo, ipo_list); 1961 ipsec_in_use++; 1962 /* 1963 * XXXSMP IPsec data structures are not ready to be 1964 * accessed by multiple Network threads in parallel, 1965 * so force all packets to be processed by the first 1966 * one. 1967 */ 1968 extern int nettaskqs; 1969 nettaskqs = 1; 1970 } else { 1971 ipo->ipo_last_searched = ipo->ipo_flags = 0; 1972 } 1973 NET_UNLOCK(); 1974 } 1975 break; 1976 1977 case SADB_X_PROMISC: 1978 if (len >= 2 * sizeof(struct sadb_msg)) { 1979 struct mbuf *packet; 1980 1981 if ((rval = pfdatatopacket(message, len, &packet)) != 0) 1982 goto ret; 1983 1984 SRPL_FOREACH(bkp, &sr, &pkptable.pkp_list, kcb_list) { 1985 if (bkp == kp || bkp->kcb_rdomain != rdomain) 1986 continue; 1987 1988 if (!smsg->sadb_msg_seq || 1989 (smsg->sadb_msg_seq == kp->kcb_pid)) { 1990 s = keylock(bkp); 1991 pfkey_sendup(bkp, packet, 1); 1992 keyunlock(bkp, s); 1993 } 1994 } 1995 SRPL_LEAVE(&sr); 1996 1997 m_freem(packet); 1998 } else { 1999 if (len != sizeof(struct sadb_msg)) { 2000 rval = EINVAL; 2001 goto ret; 2002 } 2003 2004 s = keylock(kp); 2005 i = (kp->kcb_flags & 2006 PFKEYV2_SOCKETFLAGS_PROMISC) ? 1 : 0; 2007 j = smsg->sadb_msg_satype ? 1 : 0; 2008 2009 if (i ^ j) { 2010 if (j) { 2011 kp->kcb_flags |= 2012 PFKEYV2_SOCKETFLAGS_PROMISC; 2013 mtx_enter(&pfkeyv2_mtx); 2014 npromisc++; 2015 mtx_leave(&pfkeyv2_mtx); 2016 } else { 2017 kp->kcb_flags &= 2018 ~PFKEYV2_SOCKETFLAGS_PROMISC; 2019 mtx_enter(&pfkeyv2_mtx); 2020 npromisc--; 2021 mtx_leave(&pfkeyv2_mtx); 2022 } 2023 } 2024 keyunlock(kp, s); 2025 } 2026 2027 break; 2028 2029 default: 2030 rval = EINVAL; 2031 goto ret; 2032 } 2033 2034 ret: 2035 if (rval) { 2036 if ((rval == EINVAL) || (rval == ENOMEM) || (rval == ENOBUFS)) 2037 goto realret; 2038 2039 for (i = 1; i <= SADB_EXT_MAX; i++) 2040 headers[i] = NULL; 2041 2042 smsg->sadb_msg_errno = abs(rval); 2043 } else { 2044 uint64_t seen = 0LL; 2045 2046 for (i = 1; i <= SADB_EXT_MAX; i++) 2047 if (headers[i]) 2048 seen |= (1LL << i); 2049 2050 if ((seen & sadb_exts_allowed_out[smsg->sadb_msg_type]) 2051 != seen) { 2052 rval = EPERM; 2053 goto realret; 2054 } 2055 2056 if ((seen & sadb_exts_required_out[smsg->sadb_msg_type]) != 2057 sadb_exts_required_out[smsg->sadb_msg_type]) { 2058 rval = EPERM; 2059 goto realret; 2060 } 2061 } 2062 2063 rval = pfkeyv2_sendmessage(headers, mode, so, 0, 0, rdomain); 2064 2065 realret: 2066 2067 if (freeme) 2068 free(freeme, M_PFKEY, 0); 2069 2070 explicit_bzero(message, len); 2071 free(message, M_PFKEY, 0); 2072 2073 if (sa1) 2074 free(sa1, M_PFKEY, 0); 2075 2076 return (rval); 2077 } 2078 2079 /* 2080 * Send an ACQUIRE message to key management, to get a new SA. 2081 */ 2082 int 2083 pfkeyv2_acquire(struct ipsec_policy *ipo, union sockaddr_union *gw, 2084 union sockaddr_union *laddr, u_int32_t *seq, struct sockaddr_encap *ddst) 2085 { 2086 void *p, *headers[SADB_EXT_MAX + 1], *buffer = NULL; 2087 struct sadb_comb *sadb_comb; 2088 struct sadb_address *sadd; 2089 struct sadb_prop *sa_prop; 2090 struct sadb_msg *smsg; 2091 int rval = 0; 2092 int i, j, registered; 2093 2094 mtx_enter(&pfkeyv2_mtx); 2095 *seq = pfkeyv2_seq++; 2096 2097 registered = nregistered; 2098 mtx_leave(&pfkeyv2_mtx); 2099 2100 if (!registered) { 2101 rval = ESRCH; 2102 goto ret; 2103 } 2104 2105 /* How large a buffer do we need... XXX we only do one proposal for now */ 2106 i = sizeof(struct sadb_msg) + 2107 (laddr == NULL ? 0 : sizeof(struct sadb_address) + 2108 PADUP(ipo->ipo_src.sa.sa_len)) + 2109 sizeof(struct sadb_address) + PADUP(gw->sa.sa_len) + 2110 sizeof(struct sadb_prop) + 1 * sizeof(struct sadb_comb); 2111 2112 if (ipo->ipo_ids) { 2113 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_local->len); 2114 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_remote->len); 2115 } 2116 2117 /* Allocate */ 2118 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 2119 rval = ENOMEM; 2120 goto ret; 2121 } 2122 2123 bzero(headers, sizeof(headers)); 2124 2125 buffer = p; 2126 2127 headers[0] = p; 2128 p += sizeof(struct sadb_msg); 2129 2130 smsg = (struct sadb_msg *) headers[0]; 2131 smsg->sadb_msg_version = PF_KEY_V2; 2132 smsg->sadb_msg_type = SADB_ACQUIRE; 2133 smsg->sadb_msg_len = i / sizeof(uint64_t); 2134 smsg->sadb_msg_seq = *seq; 2135 2136 if (ipo->ipo_sproto == IPPROTO_ESP) 2137 smsg->sadb_msg_satype = SADB_SATYPE_ESP; 2138 else if (ipo->ipo_sproto == IPPROTO_AH) 2139 smsg->sadb_msg_satype = SADB_SATYPE_AH; 2140 else if (ipo->ipo_sproto == IPPROTO_IPCOMP) 2141 smsg->sadb_msg_satype = SADB_X_SATYPE_IPCOMP; 2142 2143 if (laddr) { 2144 headers[SADB_EXT_ADDRESS_SRC] = p; 2145 p += sizeof(struct sadb_address) + PADUP(laddr->sa.sa_len); 2146 sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_SRC]; 2147 sadd->sadb_address_len = (sizeof(struct sadb_address) + 2148 laddr->sa.sa_len + sizeof(uint64_t) - 1) / 2149 sizeof(uint64_t); 2150 bcopy(laddr, headers[SADB_EXT_ADDRESS_SRC] + 2151 sizeof(struct sadb_address), laddr->sa.sa_len); 2152 } 2153 2154 headers[SADB_EXT_ADDRESS_DST] = p; 2155 p += sizeof(struct sadb_address) + PADUP(gw->sa.sa_len); 2156 sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_DST]; 2157 sadd->sadb_address_len = (sizeof(struct sadb_address) + 2158 gw->sa.sa_len + sizeof(uint64_t) - 1) / sizeof(uint64_t); 2159 bcopy(gw, headers[SADB_EXT_ADDRESS_DST] + sizeof(struct sadb_address), 2160 gw->sa.sa_len); 2161 2162 if (ipo->ipo_ids) 2163 export_identities(&p, ipo->ipo_ids, 0, headers); 2164 2165 headers[SADB_EXT_PROPOSAL] = p; 2166 p += sizeof(struct sadb_prop); 2167 sa_prop = (struct sadb_prop *) headers[SADB_EXT_PROPOSAL]; 2168 sa_prop->sadb_prop_num = 1; /* XXX One proposal only */ 2169 sa_prop->sadb_prop_len = (sizeof(struct sadb_prop) + 2170 (sizeof(struct sadb_comb) * sa_prop->sadb_prop_num)) / 2171 sizeof(uint64_t); 2172 2173 sadb_comb = p; 2174 2175 /* XXX Should actually ask the crypto layer what's supported */ 2176 for (j = 0; j < sa_prop->sadb_prop_num; j++) { 2177 sadb_comb->sadb_comb_flags = 0; 2178 #ifdef IPSEC 2179 if (ipsec_require_pfs) 2180 sadb_comb->sadb_comb_flags |= SADB_SAFLAGS_PFS; 2181 2182 /* Set the encryption algorithm */ 2183 if (ipo->ipo_sproto == IPPROTO_ESP) { 2184 if (!strncasecmp(ipsec_def_enc, "aes", 2185 sizeof("aes"))) { 2186 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AES; 2187 sadb_comb->sadb_comb_encrypt_minbits = 128; 2188 sadb_comb->sadb_comb_encrypt_maxbits = 256; 2189 } else if (!strncasecmp(ipsec_def_enc, "aesctr", 2190 sizeof("aesctr"))) { 2191 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AESCTR; 2192 sadb_comb->sadb_comb_encrypt_minbits = 128+32; 2193 sadb_comb->sadb_comb_encrypt_maxbits = 256+32; 2194 } else if (!strncasecmp(ipsec_def_enc, "3des", 2195 sizeof("3des"))) { 2196 sadb_comb->sadb_comb_encrypt = SADB_EALG_3DESCBC; 2197 sadb_comb->sadb_comb_encrypt_minbits = 192; 2198 sadb_comb->sadb_comb_encrypt_maxbits = 192; 2199 } else if (!strncasecmp(ipsec_def_enc, "blowfish", 2200 sizeof("blowfish"))) { 2201 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_BLF; 2202 sadb_comb->sadb_comb_encrypt_minbits = 40; 2203 sadb_comb->sadb_comb_encrypt_maxbits = BLF_MAXKEYLEN * 8; 2204 } else if (!strncasecmp(ipsec_def_enc, "cast128", 2205 sizeof("cast128"))) { 2206 sadb_comb->sadb_comb_encrypt = SADB_X_EALG_CAST; 2207 sadb_comb->sadb_comb_encrypt_minbits = 40; 2208 sadb_comb->sadb_comb_encrypt_maxbits = 128; 2209 } 2210 } else if (ipo->ipo_sproto == IPPROTO_IPCOMP) { 2211 /* Set the compression algorithm */ 2212 if (!strncasecmp(ipsec_def_comp, "deflate", 2213 sizeof("deflate"))) { 2214 sadb_comb->sadb_comb_encrypt = SADB_X_CALG_DEFLATE; 2215 sadb_comb->sadb_comb_encrypt_minbits = 0; 2216 sadb_comb->sadb_comb_encrypt_maxbits = 0; 2217 } else if (!strncasecmp(ipsec_def_comp, "lzs", 2218 sizeof("lzs"))) { 2219 sadb_comb->sadb_comb_encrypt = SADB_X_CALG_LZS; 2220 sadb_comb->sadb_comb_encrypt_minbits = 0; 2221 sadb_comb->sadb_comb_encrypt_maxbits = 0; 2222 } 2223 } 2224 2225 /* Set the authentication algorithm */ 2226 if (!strncasecmp(ipsec_def_auth, "hmac-sha1", 2227 sizeof("hmac-sha1"))) { 2228 sadb_comb->sadb_comb_auth = SADB_AALG_SHA1HMAC; 2229 sadb_comb->sadb_comb_auth_minbits = 160; 2230 sadb_comb->sadb_comb_auth_maxbits = 160; 2231 } else if (!strncasecmp(ipsec_def_auth, "hmac-ripemd160", 2232 sizeof("hmac_ripemd160"))) { 2233 sadb_comb->sadb_comb_auth = SADB_X_AALG_RIPEMD160HMAC; 2234 sadb_comb->sadb_comb_auth_minbits = 160; 2235 sadb_comb->sadb_comb_auth_maxbits = 160; 2236 } else if (!strncasecmp(ipsec_def_auth, "hmac-md5", 2237 sizeof("hmac-md5"))) { 2238 sadb_comb->sadb_comb_auth = SADB_AALG_MD5HMAC; 2239 sadb_comb->sadb_comb_auth_minbits = 128; 2240 sadb_comb->sadb_comb_auth_maxbits = 128; 2241 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-256", 2242 sizeof("hmac-sha2-256"))) { 2243 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_256; 2244 sadb_comb->sadb_comb_auth_minbits = 256; 2245 sadb_comb->sadb_comb_auth_maxbits = 256; 2246 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-384", 2247 sizeof("hmac-sha2-384"))) { 2248 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_384; 2249 sadb_comb->sadb_comb_auth_minbits = 384; 2250 sadb_comb->sadb_comb_auth_maxbits = 384; 2251 } else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-512", 2252 sizeof("hmac-sha2-512"))) { 2253 sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_512; 2254 sadb_comb->sadb_comb_auth_minbits = 512; 2255 sadb_comb->sadb_comb_auth_maxbits = 512; 2256 } 2257 2258 sadb_comb->sadb_comb_soft_allocations = ipsec_soft_allocations; 2259 sadb_comb->sadb_comb_hard_allocations = ipsec_exp_allocations; 2260 2261 sadb_comb->sadb_comb_soft_bytes = ipsec_soft_bytes; 2262 sadb_comb->sadb_comb_hard_bytes = ipsec_exp_bytes; 2263 2264 sadb_comb->sadb_comb_soft_addtime = ipsec_soft_timeout; 2265 sadb_comb->sadb_comb_hard_addtime = ipsec_exp_timeout; 2266 2267 sadb_comb->sadb_comb_soft_usetime = ipsec_soft_first_use; 2268 sadb_comb->sadb_comb_hard_usetime = ipsec_exp_first_use; 2269 #endif 2270 sadb_comb++; 2271 } 2272 2273 /* Send the ACQUIRE message to all compliant registered listeners. */ 2274 if ((rval = pfkeyv2_sendmessage(headers, 2275 PFKEYV2_SENDMESSAGE_REGISTERED, NULL, smsg->sadb_msg_satype, 0, 2276 ipo->ipo_rdomain)) != 0) 2277 goto ret; 2278 2279 rval = 0; 2280 ret: 2281 if (buffer != NULL) { 2282 bzero(buffer, i); 2283 free(buffer, M_PFKEY, 0); 2284 } 2285 2286 return (rval); 2287 } 2288 2289 /* 2290 * Notify key management that an expiration went off. The second argument 2291 * specifies the type of expiration (soft or hard). 2292 */ 2293 int 2294 pfkeyv2_expire(struct tdb *tdb, u_int16_t type) 2295 { 2296 void *p, *headers[SADB_EXT_MAX+1], *buffer = NULL; 2297 struct sadb_msg *smsg; 2298 int rval = 0; 2299 int i; 2300 2301 switch (tdb->tdb_sproto) { 2302 case IPPROTO_AH: 2303 case IPPROTO_ESP: 2304 case IPPROTO_IPIP: 2305 case IPPROTO_IPCOMP: 2306 #ifdef TCP_SIGNATURE 2307 case IPPROTO_TCP: 2308 #endif /* TCP_SIGNATURE */ 2309 break; 2310 2311 default: 2312 rval = EOPNOTSUPP; 2313 goto ret; 2314 } 2315 2316 i = sizeof(struct sadb_msg) + sizeof(struct sadb_sa) + 2317 2 * sizeof(struct sadb_lifetime) + 2318 sizeof(struct sadb_address) + PADUP(tdb->tdb_src.sa.sa_len) + 2319 sizeof(struct sadb_address) + PADUP(tdb->tdb_dst.sa.sa_len); 2320 2321 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 2322 rval = ENOMEM; 2323 goto ret; 2324 } 2325 2326 bzero(headers, sizeof(headers)); 2327 2328 buffer = p; 2329 2330 headers[0] = p; 2331 p += sizeof(struct sadb_msg); 2332 2333 smsg = (struct sadb_msg *) headers[0]; 2334 smsg->sadb_msg_version = PF_KEY_V2; 2335 smsg->sadb_msg_type = SADB_EXPIRE; 2336 smsg->sadb_msg_satype = tdb->tdb_satype; 2337 smsg->sadb_msg_len = i / sizeof(uint64_t); 2338 2339 mtx_enter(&pfkeyv2_mtx); 2340 smsg->sadb_msg_seq = pfkeyv2_seq++; 2341 mtx_leave(&pfkeyv2_mtx); 2342 2343 headers[SADB_EXT_SA] = p; 2344 export_sa(&p, tdb); 2345 2346 headers[SADB_EXT_LIFETIME_CURRENT] = p; 2347 export_lifetime(&p, tdb, 2); 2348 2349 headers[type] = p; 2350 export_lifetime(&p, tdb, type == SADB_EXT_LIFETIME_SOFT ? 2351 PFKEYV2_LIFETIME_SOFT : PFKEYV2_LIFETIME_HARD); 2352 2353 headers[SADB_EXT_ADDRESS_SRC] = p; 2354 export_address(&p, &tdb->tdb_src.sa); 2355 2356 headers[SADB_EXT_ADDRESS_DST] = p; 2357 export_address(&p, &tdb->tdb_dst.sa); 2358 2359 if ((rval = pfkeyv2_sendmessage(headers, PFKEYV2_SENDMESSAGE_BROADCAST, 2360 NULL, 0, 0, tdb->tdb_rdomain)) != 0) 2361 goto ret; 2362 2363 rval = 0; 2364 2365 ret: 2366 if (buffer != NULL) { 2367 bzero(buffer, i); 2368 free(buffer, M_PFKEY, 0); 2369 } 2370 2371 return (rval); 2372 } 2373 2374 struct pfkeyv2_sysctl_walk { 2375 void *w_where; 2376 size_t w_len; 2377 int w_op; 2378 u_int8_t w_satype; 2379 }; 2380 2381 int 2382 pfkeyv2_sysctl_walker(struct tdb *tdb, void *arg, int last) 2383 { 2384 struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg; 2385 void *buffer = NULL; 2386 int error = 0; 2387 int buflen, i; 2388 2389 if (w->w_satype != SADB_SATYPE_UNSPEC && 2390 w->w_satype != tdb->tdb_satype) 2391 return (0); 2392 2393 if (w->w_where) { 2394 void *headers[SADB_EXT_MAX+1]; 2395 struct sadb_msg msg; 2396 2397 bzero(headers, sizeof(headers)); 2398 if ((error = pfkeyv2_get(tdb, headers, &buffer, &buflen)) != 0) 2399 goto done; 2400 if (w->w_len < sizeof(msg) + buflen) { 2401 error = ENOMEM; 2402 goto done; 2403 } 2404 /* prepend header */ 2405 bzero(&msg, sizeof(msg)); 2406 msg.sadb_msg_version = PF_KEY_V2; 2407 msg.sadb_msg_satype = tdb->tdb_satype; 2408 msg.sadb_msg_type = SADB_DUMP; 2409 msg.sadb_msg_len = (sizeof(msg) + buflen) / sizeof(uint64_t); 2410 if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0) 2411 goto done; 2412 w->w_where += sizeof(msg); 2413 w->w_len -= sizeof(msg); 2414 /* set extension type */ 2415 for (i = 1; i <= SADB_EXT_MAX; i++) 2416 if (headers[i]) 2417 ((struct sadb_ext *) 2418 headers[i])->sadb_ext_type = i; 2419 if ((error = copyout(buffer, w->w_where, buflen)) != 0) 2420 goto done; 2421 w->w_where += buflen; 2422 w->w_len -= buflen; 2423 } else { 2424 if ((error = pfkeyv2_get(tdb, NULL, NULL, &buflen)) != 0) 2425 return (error); 2426 w->w_len += buflen; 2427 w->w_len += sizeof(struct sadb_msg); 2428 } 2429 2430 done: 2431 if (buffer) 2432 free(buffer, M_PFKEY, 0); 2433 return (error); 2434 } 2435 2436 int 2437 pfkeyv2_dump_policy(struct ipsec_policy *ipo, void **headers, void **buffer, 2438 int *lenp) 2439 { 2440 int i, rval, perm; 2441 void *p; 2442 2443 /* Find how much space we need. */ 2444 i = 2 * sizeof(struct sadb_protocol); 2445 2446 /* We'll need four of them: src, src mask, dst, dst mask. */ 2447 switch (ipo->ipo_addr.sen_type) { 2448 case SENT_IP4: 2449 i += 4 * PADUP(sizeof(struct sockaddr_in)); 2450 i += 4 * sizeof(struct sadb_address); 2451 break; 2452 #ifdef INET6 2453 case SENT_IP6: 2454 i += 4 * PADUP(sizeof(struct sockaddr_in6)); 2455 i += 4 * sizeof(struct sadb_address); 2456 break; 2457 #endif /* INET6 */ 2458 default: 2459 return (EINVAL); 2460 } 2461 2462 /* Local address, might be zeroed. */ 2463 switch (ipo->ipo_src.sa.sa_family) { 2464 case 0: 2465 break; 2466 case AF_INET: 2467 i += PADUP(sizeof(struct sockaddr_in)); 2468 i += sizeof(struct sadb_address); 2469 break; 2470 #ifdef INET6 2471 case AF_INET6: 2472 i += PADUP(sizeof(struct sockaddr_in6)); 2473 i += sizeof(struct sadb_address); 2474 break; 2475 #endif /* INET6 */ 2476 default: 2477 return (EINVAL); 2478 } 2479 2480 /* Remote address, might be zeroed. XXX ??? */ 2481 switch (ipo->ipo_dst.sa.sa_family) { 2482 case 0: 2483 break; 2484 case AF_INET: 2485 i += PADUP(sizeof(struct sockaddr_in)); 2486 i += sizeof(struct sadb_address); 2487 break; 2488 #ifdef INET6 2489 case AF_INET6: 2490 i += PADUP(sizeof(struct sockaddr_in6)); 2491 i += sizeof(struct sadb_address); 2492 break; 2493 #endif /* INET6 */ 2494 default: 2495 return (EINVAL); 2496 } 2497 2498 if (ipo->ipo_ids) { 2499 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_local->len); 2500 i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_remote->len); 2501 } 2502 2503 if (lenp) 2504 *lenp = i; 2505 2506 if (buffer == NULL) { 2507 rval = 0; 2508 goto ret; 2509 } 2510 2511 if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) { 2512 rval = ENOMEM; 2513 goto ret; 2514 } else 2515 *buffer = p; 2516 2517 /* Local address. */ 2518 if (ipo->ipo_src.sa.sa_family) { 2519 headers[SADB_EXT_ADDRESS_SRC] = p; 2520 export_address(&p, &ipo->ipo_src.sa); 2521 } 2522 2523 /* Remote address. */ 2524 if (ipo->ipo_dst.sa.sa_family) { 2525 headers[SADB_EXT_ADDRESS_DST] = p; 2526 export_address(&p, &ipo->ipo_dst.sa); 2527 } 2528 2529 /* Get actual flow. */ 2530 export_flow(&p, ipo->ipo_type, &ipo->ipo_addr, &ipo->ipo_mask, 2531 headers); 2532 2533 /* Add ids only when we are root. */ 2534 perm = suser(curproc); 2535 if (perm == 0 && ipo->ipo_ids) 2536 export_identities(&p, ipo->ipo_ids, 0, headers); 2537 2538 rval = 0; 2539 ret: 2540 return (rval); 2541 } 2542 2543 int 2544 pfkeyv2_sysctl_policydumper(struct ipsec_policy *ipo, void *arg, 2545 unsigned int tableid) 2546 { 2547 struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg; 2548 void *buffer = 0; 2549 int i, buflen, error = 0; 2550 2551 if (w->w_where) { 2552 void *headers[SADB_EXT_MAX + 1]; 2553 struct sadb_msg msg; 2554 2555 bzero(headers, sizeof(headers)); 2556 if ((error = pfkeyv2_dump_policy(ipo, headers, &buffer, 2557 &buflen)) != 0) 2558 goto done; 2559 if (w->w_len < buflen) { 2560 error = ENOMEM; 2561 goto done; 2562 } 2563 /* prepend header */ 2564 bzero(&msg, sizeof(msg)); 2565 msg.sadb_msg_version = PF_KEY_V2; 2566 if (ipo->ipo_sproto == IPPROTO_ESP) 2567 msg.sadb_msg_satype = SADB_SATYPE_ESP; 2568 else if (ipo->ipo_sproto == IPPROTO_AH) 2569 msg.sadb_msg_satype = SADB_SATYPE_AH; 2570 else if (ipo->ipo_sproto == IPPROTO_IPCOMP) 2571 msg.sadb_msg_satype = SADB_X_SATYPE_IPCOMP; 2572 else if (ipo->ipo_sproto == IPPROTO_IPIP) 2573 msg.sadb_msg_satype = SADB_X_SATYPE_IPIP; 2574 msg.sadb_msg_type = SADB_X_SPDDUMP; 2575 msg.sadb_msg_len = (sizeof(msg) + buflen) / sizeof(uint64_t); 2576 if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0) 2577 goto done; 2578 w->w_where += sizeof(msg); 2579 w->w_len -= sizeof(msg); 2580 /* set extension type */ 2581 for (i = 1; i <= SADB_EXT_MAX; i++) 2582 if (headers[i]) 2583 ((struct sadb_ext *) 2584 headers[i])->sadb_ext_type = i; 2585 if ((error = copyout(buffer, w->w_where, buflen)) != 0) 2586 goto done; 2587 w->w_where += buflen; 2588 w->w_len -= buflen; 2589 } else { 2590 if ((error = pfkeyv2_dump_policy(ipo, NULL, NULL, 2591 &buflen)) != 0) 2592 goto done; 2593 w->w_len += buflen; 2594 w->w_len += sizeof(struct sadb_msg); 2595 } 2596 2597 done: 2598 if (buffer) 2599 free(buffer, M_PFKEY, 0); 2600 return (error); 2601 } 2602 2603 int 2604 pfkeyv2_policy_flush(struct ipsec_policy *ipo, void *arg, unsigned int tableid) 2605 { 2606 int error; 2607 2608 error = ipsec_delete_policy(ipo); 2609 if (error == 0) 2610 error = EAGAIN; 2611 2612 return (error); 2613 } 2614 2615 int 2616 pfkeyv2_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 2617 void *new, size_t newlen) 2618 { 2619 struct pfkeyv2_sysctl_walk w; 2620 int error = EINVAL; 2621 u_int rdomain; 2622 2623 if (new) 2624 return (EPERM); 2625 if (namelen < 1) 2626 return (EINVAL); 2627 w.w_op = name[0]; 2628 w.w_satype = name[1]; 2629 w.w_where = oldp; 2630 w.w_len = oldp ? *oldlenp : 0; 2631 2632 rdomain = rtable_l2(curproc->p_p->ps_rtableid); 2633 2634 switch(w.w_op) { 2635 case NET_KEY_SADB_DUMP: 2636 if ((error = suser(curproc)) != 0) 2637 return (error); 2638 NET_LOCK(); 2639 error = tdb_walk(rdomain, pfkeyv2_sysctl_walker, &w); 2640 NET_UNLOCK(); 2641 if (oldp) 2642 *oldlenp = w.w_where - oldp; 2643 else 2644 *oldlenp = w.w_len; 2645 break; 2646 2647 case NET_KEY_SPD_DUMP: 2648 NET_LOCK(); 2649 error = spd_table_walk(rdomain, 2650 pfkeyv2_sysctl_policydumper, &w); 2651 NET_UNLOCK(); 2652 if (oldp) 2653 *oldlenp = w.w_where - oldp; 2654 else 2655 *oldlenp = w.w_len; 2656 break; 2657 } 2658 2659 return (error); 2660 } 2661