key.c revision 1.169
1 /* $NetBSD: key.c,v 1.169 2017/07/10 07:27:35 ozaki-r Exp $ */ 2 /* $FreeBSD: src/sys/netipsec/key.c,v 1.3.2.3 2004/02/14 22:23:23 bms Exp $ */ 3 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: key.c,v 1.169 2017/07/10 07:27:35 ozaki-r Exp $"); 36 37 /* 38 * This code is referd to RFC 2367 39 */ 40 41 #if defined(_KERNEL_OPT) 42 #include "opt_inet.h" 43 #include "opt_ipsec.h" 44 #include "opt_gateway.h" 45 #endif 46 47 #include <sys/types.h> 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/callout.h> 51 #include <sys/kernel.h> 52 #include <sys/mbuf.h> 53 #include <sys/domain.h> 54 #include <sys/socket.h> 55 #include <sys/socketvar.h> 56 #include <sys/sysctl.h> 57 #include <sys/errno.h> 58 #include <sys/proc.h> 59 #include <sys/queue.h> 60 #include <sys/syslog.h> 61 #include <sys/once.h> 62 #include <sys/cprng.h> 63 #include <sys/psref.h> 64 #include <sys/lwp.h> 65 #include <sys/workqueue.h> 66 #include <sys/kmem.h> 67 #include <sys/cpu.h> 68 #include <sys/atomic.h> 69 70 #include <net/if.h> 71 #include <net/route.h> 72 73 #include <netinet/in.h> 74 #include <netinet/in_systm.h> 75 #include <netinet/ip.h> 76 #include <netinet/in_var.h> 77 #ifdef INET 78 #include <netinet/ip_var.h> 79 #endif 80 81 #ifdef INET6 82 #include <netinet/ip6.h> 83 #include <netinet6/in6_var.h> 84 #include <netinet6/ip6_var.h> 85 #endif /* INET6 */ 86 87 #ifdef INET 88 #include <netinet/in_pcb.h> 89 #endif 90 #ifdef INET6 91 #include <netinet6/in6_pcb.h> 92 #endif /* INET6 */ 93 94 #include <net/pfkeyv2.h> 95 #include <netipsec/keydb.h> 96 #include <netipsec/key.h> 97 #include <netipsec/keysock.h> 98 #include <netipsec/key_debug.h> 99 100 #include <netipsec/ipsec.h> 101 #ifdef INET6 102 #include <netipsec/ipsec6.h> 103 #endif 104 #include <netipsec/ipsec_private.h> 105 106 #include <netipsec/xform.h> 107 #include <netipsec/ipcomp.h> 108 109 110 #include <net/net_osdep.h> 111 112 #define FULLMASK 0xff 113 #define _BITS(bytes) ((bytes) << 3) 114 115 #define PORT_NONE 0 116 #define PORT_LOOSE 1 117 #define PORT_STRICT 2 118 119 percpu_t *pfkeystat_percpu; 120 121 /* 122 * Note on SA reference counting: 123 * - SAs that are not in DEAD state will have (total external reference + 1) 124 * following value in reference count field. they cannot be freed and are 125 * referenced from SA header. 126 * - SAs that are in DEAD state will have (total external reference) 127 * in reference count field. they are ready to be freed. reference from 128 * SA header will be removed in key_delsav(), when the reference count 129 * field hits 0 (= no external reference other than from SA header. 130 */ 131 132 u_int32_t key_debug_level = 0; 133 static u_int key_spi_trycnt = 1000; 134 static u_int32_t key_spi_minval = 0x100; 135 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 136 static u_int32_t policy_id = 0; 137 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 138 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 139 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 140 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 141 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 142 143 static u_int32_t acq_seq = 0; 144 145 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 146 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 147 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 148 /* registed list */ 149 #ifndef IPSEC_NONBLOCK_ACQUIRE 150 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 151 #endif 152 #ifdef notyet 153 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 154 #endif 155 156 /* 157 * Protect regtree, acqtree and items stored in the lists. 158 */ 159 static kmutex_t key_mtx __cacheline_aligned; 160 161 /* search order for SAs */ 162 /* 163 * This order is important because we must select the oldest SA 164 * for outbound processing. For inbound, This is not important. 165 */ 166 static const u_int saorder_state_valid_prefer_old[] = { 167 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 168 }; 169 static const u_int saorder_state_valid_prefer_new[] = { 170 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 171 }; 172 173 static const u_int saorder_state_alive[] = { 174 /* except DEAD */ 175 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 176 }; 177 static const u_int saorder_state_any[] = { 178 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 179 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 180 }; 181 182 #define SASTATE_ALIVE_FOREACH(s) \ 183 for (int _i = 0; \ 184 _i < __arraycount(saorder_state_alive) ? \ 185 (s) = saorder_state_alive[_i], true : false; \ 186 _i++) 187 #define SASTATE_ANY_FOREACH(s) \ 188 for (int _i = 0; \ 189 _i < __arraycount(saorder_state_any) ? \ 190 (s) = saorder_state_any[_i], true : false; \ 191 _i++) 192 193 static const int minsize[] = { 194 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 195 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 196 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 197 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 198 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 199 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 200 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 201 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 202 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 203 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 204 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 205 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 206 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 207 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 208 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 209 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 210 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 211 0, /* SADB_X_EXT_KMPRIVATE */ 212 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 213 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 214 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 215 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 216 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 217 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 218 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 219 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 220 }; 221 static const int maxsize[] = { 222 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 223 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 224 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 225 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 226 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 227 0, /* SADB_EXT_ADDRESS_SRC */ 228 0, /* SADB_EXT_ADDRESS_DST */ 229 0, /* SADB_EXT_ADDRESS_PROXY */ 230 0, /* SADB_EXT_KEY_AUTH */ 231 0, /* SADB_EXT_KEY_ENCRYPT */ 232 0, /* SADB_EXT_IDENTITY_SRC */ 233 0, /* SADB_EXT_IDENTITY_DST */ 234 0, /* SADB_EXT_SENSITIVITY */ 235 0, /* SADB_EXT_PROPOSAL */ 236 0, /* SADB_EXT_SUPPORTED_AUTH */ 237 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 238 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 239 0, /* SADB_X_EXT_KMPRIVATE */ 240 0, /* SADB_X_EXT_POLICY */ 241 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 242 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 243 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 244 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 245 0, /* SADB_X_EXT_NAT_T_OAI */ 246 0, /* SADB_X_EXT_NAT_T_OAR */ 247 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 248 }; 249 250 static int ipsec_esp_keymin = 256; 251 static int ipsec_esp_auth = 0; 252 static int ipsec_ah_keymin = 128; 253 254 #ifdef SYSCTL_DECL 255 SYSCTL_DECL(_net_key); 256 #endif 257 258 #ifdef SYSCTL_INT 259 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 260 &key_debug_level, 0, ""); 261 262 /* max count of trial for the decision of spi value */ 263 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 264 &key_spi_trycnt, 0, ""); 265 266 /* minimum spi value to allocate automatically. */ 267 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 268 &key_spi_minval, 0, ""); 269 270 /* maximun spi value to allocate automatically. */ 271 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 272 &key_spi_maxval, 0, ""); 273 274 /* interval to initialize randseed */ 275 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 276 &key_int_random, 0, ""); 277 278 /* lifetime for larval SA */ 279 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 280 &key_larval_lifetime, 0, ""); 281 282 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 283 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 284 &key_blockacq_count, 0, ""); 285 286 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 287 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 288 &key_blockacq_lifetime, 0, ""); 289 290 /* ESP auth */ 291 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 292 &ipsec_esp_auth, 0, ""); 293 294 /* minimum ESP key length */ 295 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 296 &ipsec_esp_keymin, 0, ""); 297 298 /* minimum AH key length */ 299 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 300 &ipsec_ah_keymin, 0, ""); 301 302 /* perfered old SA rather than new SA */ 303 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 304 &key_prefered_oldsa, 0, ""); 305 #endif /* SYSCTL_INT */ 306 307 #define __LIST_CHAINED(elm) \ 308 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 309 #define LIST_INSERT_TAIL(head, elm, type, field) \ 310 do {\ 311 struct type *curelm = LIST_FIRST(head); \ 312 if (curelm == NULL) {\ 313 LIST_INSERT_HEAD(head, elm, field); \ 314 } else { \ 315 while (LIST_NEXT(curelm, field)) \ 316 curelm = LIST_NEXT(curelm, field);\ 317 LIST_INSERT_AFTER(curelm, elm, field);\ 318 }\ 319 } while (0) 320 321 #define KEY_CHKSASTATE(head, sav) \ 322 /* do */ { \ 323 if ((head) != (sav)) { \ 324 IPSECLOG(LOG_DEBUG, \ 325 "state mismatched (TREE=%d SA=%d)\n", \ 326 (head), (sav)); \ 327 continue; \ 328 } \ 329 } /* while (0) */ 330 331 #define KEY_CHKSPDIR(head, sp) \ 332 do { \ 333 if ((head) != (sp)) { \ 334 IPSECLOG(LOG_DEBUG, \ 335 "direction mismatched (TREE=%d SP=%d), anyway continue.\n",\ 336 (head), (sp)); \ 337 } \ 338 } while (0) 339 340 /* 341 * set parameters into secasindex buffer. 342 * Must allocate secasindex buffer before calling this function. 343 */ 344 static int 345 key_setsecasidx(int, int, int, const struct sockaddr *, 346 const struct sockaddr *, struct secasindex *); 347 348 /* key statistics */ 349 struct _keystat { 350 u_long getspi_count; /* the avarage of count to try to get new SPI */ 351 } keystat; 352 353 struct sadb_msghdr { 354 struct sadb_msg *msg; 355 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 356 int extoff[SADB_EXT_MAX + 1]; 357 int extlen[SADB_EXT_MAX + 1]; 358 }; 359 360 static void 361 key_init_spidx_bymsghdr(struct secpolicyindex *, const struct sadb_msghdr *); 362 363 static const struct sockaddr * 364 key_msghdr_get_sockaddr(const struct sadb_msghdr *mhp, int idx) 365 { 366 367 return PFKEY_ADDR_SADDR((struct sadb_address *)mhp->ext[idx]); 368 } 369 370 static struct mbuf * 371 key_fill_replymsg(struct mbuf *m, int seq) 372 { 373 struct sadb_msg *msg; 374 375 if (m->m_len < sizeof(*msg)) { 376 m = m_pullup(m, sizeof(*msg)); 377 if (m == NULL) 378 return NULL; 379 } 380 msg = mtod(m, struct sadb_msg *); 381 msg->sadb_msg_errno = 0; 382 msg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 383 if (seq != 0) 384 msg->sadb_msg_seq = seq; 385 386 return m; 387 } 388 389 static struct secasvar *key_allocsa_policy (const struct secasindex *); 390 #if 0 391 static void key_freeso(struct socket *); 392 static void key_freesp_so(struct secpolicy **); 393 #endif 394 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int); 395 static void key_delsp (struct secpolicy *); 396 static struct secpolicy *key_getsp (const struct secpolicyindex *); 397 static struct secpolicy *key_getspbyid (u_int32_t); 398 static u_int16_t key_newreqid (void); 399 static struct mbuf *key_gather_mbuf (struct mbuf *, 400 const struct sadb_msghdr *, int, int, ...); 401 static int key_api_spdadd(struct socket *, struct mbuf *, 402 const struct sadb_msghdr *); 403 static u_int32_t key_getnewspid (void); 404 static int key_api_spddelete(struct socket *, struct mbuf *, 405 const struct sadb_msghdr *); 406 static int key_api_spddelete2(struct socket *, struct mbuf *, 407 const struct sadb_msghdr *); 408 static int key_api_spdget(struct socket *, struct mbuf *, 409 const struct sadb_msghdr *); 410 static int key_api_spdflush(struct socket *, struct mbuf *, 411 const struct sadb_msghdr *); 412 static int key_api_spddump(struct socket *, struct mbuf *, 413 const struct sadb_msghdr *); 414 static struct mbuf * key_setspddump (int *errorp, pid_t); 415 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 416 static int key_api_nat_map(struct socket *, struct mbuf *, 417 const struct sadb_msghdr *); 418 static struct mbuf *key_setdumpsp (struct secpolicy *, 419 u_int8_t, u_int32_t, pid_t); 420 static u_int key_getspreqmsglen (const struct secpolicy *); 421 static int key_spdexpire (struct secpolicy *); 422 static struct secashead *key_newsah (const struct secasindex *); 423 static void key_delsah (struct secashead *); 424 static struct secasvar *key_newsav (struct mbuf *, 425 const struct sadb_msghdr *, struct secashead *, int *, 426 const char*, int); 427 #define KEY_NEWSAV(m, sadb, sah, e) \ 428 key_newsav(m, sadb, sah, e, __func__, __LINE__) 429 static void key_delsav (struct secasvar *); 430 static struct secashead *key_getsah(const struct secasindex *, int); 431 static struct secasvar *key_checkspidup (const struct secasindex *, u_int32_t); 432 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 433 static int key_setsaval (struct secasvar *, struct mbuf *, 434 const struct sadb_msghdr *); 435 static void key_freesaval(struct secasvar *); 436 static int key_mature (struct secasvar *); 437 static void key_clear_xform(struct secasvar *); 438 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 439 u_int8_t, u_int32_t, u_int32_t); 440 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 441 static struct mbuf *key_setsadbxtype (u_int16_t); 442 static struct mbuf *key_setsadbxfrag (u_int16_t); 443 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 444 static int key_checksalen (const union sockaddr_union *); 445 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 446 u_int32_t, pid_t, u_int16_t); 447 static struct mbuf *key_setsadbsa (struct secasvar *); 448 static struct mbuf *key_setsadbaddr (u_int16_t, 449 const struct sockaddr *, u_int8_t, u_int16_t); 450 #if 0 451 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 452 int, u_int64_t); 453 #endif 454 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 455 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 456 u_int32_t); 457 static void *key_newbuf (const void *, u_int); 458 #ifdef INET6 459 static int key_ismyaddr6 (const struct sockaddr_in6 *); 460 #endif 461 462 static void sysctl_net_keyv2_setup(struct sysctllog **); 463 static void sysctl_net_key_compat_setup(struct sysctllog **); 464 465 /* flags for key_saidx_match() */ 466 #define CMP_HEAD 1 /* protocol, addresses. */ 467 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 468 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 469 #define CMP_EXACTLY 4 /* all elements. */ 470 static int key_saidx_match(const struct secasindex *, 471 const struct secasindex *, int); 472 473 static int key_sockaddr_match(const struct sockaddr *, 474 const struct sockaddr *, int); 475 static int key_bb_match_withmask(const void *, const void *, u_int); 476 static u_int16_t key_satype2proto (u_int8_t); 477 static u_int8_t key_proto2satype (u_int16_t); 478 479 static int key_spidx_match_exactly(const struct secpolicyindex *, 480 const struct secpolicyindex *); 481 static int key_spidx_match_withmask(const struct secpolicyindex *, 482 const struct secpolicyindex *); 483 484 static int key_api_getspi(struct socket *, struct mbuf *, 485 const struct sadb_msghdr *); 486 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 487 const struct secasindex *); 488 static int key_handle_natt_info (struct secasvar *, 489 const struct sadb_msghdr *); 490 static int key_set_natt_ports (union sockaddr_union *, 491 union sockaddr_union *, 492 const struct sadb_msghdr *); 493 static int key_api_update(struct socket *, struct mbuf *, 494 const struct sadb_msghdr *); 495 #ifdef IPSEC_DOSEQCHECK 496 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 497 #endif 498 static int key_api_add(struct socket *, struct mbuf *, 499 const struct sadb_msghdr *); 500 static int key_setident (struct secashead *, struct mbuf *, 501 const struct sadb_msghdr *); 502 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 503 const struct sadb_msghdr *); 504 static int key_api_delete(struct socket *, struct mbuf *, 505 const struct sadb_msghdr *); 506 static int key_api_get(struct socket *, struct mbuf *, 507 const struct sadb_msghdr *); 508 509 static void key_getcomb_setlifetime (struct sadb_comb *); 510 static struct mbuf *key_getcomb_esp (void); 511 static struct mbuf *key_getcomb_ah (void); 512 static struct mbuf *key_getcomb_ipcomp (void); 513 static struct mbuf *key_getprop (const struct secasindex *); 514 515 static int key_acquire (const struct secasindex *, struct secpolicy *); 516 #ifndef IPSEC_NONBLOCK_ACQUIRE 517 static struct secacq *key_newacq (const struct secasindex *); 518 static struct secacq *key_getacq (const struct secasindex *); 519 static struct secacq *key_getacqbyseq (u_int32_t); 520 #endif 521 #ifdef notyet 522 static struct secspacq *key_newspacq (const struct secpolicyindex *); 523 static struct secspacq *key_getspacq (const struct secpolicyindex *); 524 #endif 525 static int key_api_acquire(struct socket *, struct mbuf *, 526 const struct sadb_msghdr *); 527 static int key_api_register(struct socket *, struct mbuf *, 528 const struct sadb_msghdr *); 529 static int key_expire (struct secasvar *); 530 static int key_api_flush(struct socket *, struct mbuf *, 531 const struct sadb_msghdr *); 532 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 533 int *lenp, pid_t pid); 534 static int key_api_dump(struct socket *, struct mbuf *, 535 const struct sadb_msghdr *); 536 static int key_api_promisc(struct socket *, struct mbuf *, 537 const struct sadb_msghdr *); 538 static int key_senderror (struct socket *, struct mbuf *, int); 539 static int key_validate_ext (const struct sadb_ext *, int); 540 static int key_align (struct mbuf *, struct sadb_msghdr *); 541 #if 0 542 static const char *key_getfqdn (void); 543 static const char *key_getuserfqdn (void); 544 #endif 545 static void key_sa_chgstate (struct secasvar *, u_int8_t); 546 static inline void key_sp_dead (struct secpolicy *); 547 static void key_sp_unlink (struct secpolicy *sp); 548 549 static struct mbuf *key_alloc_mbuf (int); 550 551 static void key_timehandler(void *); 552 static void key_timehandler_work(struct work *, void *); 553 static struct callout key_timehandler_ch; 554 static struct workqueue *key_timehandler_wq; 555 static struct work key_timehandler_wk; 556 557 #ifdef IPSEC_REF_DEBUG 558 #define REFLOG(label, p, where, tag) \ 559 log(LOG_DEBUG, "%s:%d: " label " : refcnt=%d (%p)\n.", \ 560 (where), (tag), (p)->refcnt, (p)) 561 #else 562 #define REFLOG(label, p, where, tag) do {} while (0) 563 #endif 564 565 #define SA_ADDREF(p) do { \ 566 atomic_inc_uint(&(p)->refcnt); \ 567 REFLOG("SA_ADDREF", (p), __func__, __LINE__); \ 568 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 569 } while (0) 570 #define SA_ADDREF2(p, where, tag) do { \ 571 atomic_inc_uint(&(p)->refcnt); \ 572 REFLOG("SA_ADDREF", (p), (where), (tag)); \ 573 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 574 } while (0) 575 #define SA_DELREF(p) do { \ 576 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 577 atomic_dec_uint(&(p)->refcnt); \ 578 REFLOG("SA_DELREF", (p), __func__, __LINE__); \ 579 } while (0) 580 #define SA_DELREF2(p, nv, where, tag) do { \ 581 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 582 nv = atomic_dec_uint_nv(&(p)->refcnt); \ 583 REFLOG("SA_DELREF", (p), (where), (tag)); \ 584 } while (0) 585 586 #define SP_ADDREF(p) do { \ 587 atomic_inc_uint(&(p)->refcnt); \ 588 REFLOG("SP_ADDREF", (p), __func__, __LINE__); \ 589 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 590 } while (0) 591 #define SP_ADDREF2(p, where, tag) do { \ 592 atomic_inc_uint(&(p)->refcnt); \ 593 REFLOG("SP_ADDREF", (p), (where), (tag)); \ 594 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 595 } while (0) 596 #define SP_DELREF(p) do { \ 597 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 598 atomic_dec_uint(&(p)->refcnt); \ 599 REFLOG("SP_DELREF", (p), __func__, __LINE__); \ 600 } while (0) 601 #define SP_DELREF2(p, nv, where, tag) do { \ 602 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 603 nv = atomic_dec_uint_nv(&(p)->refcnt); \ 604 REFLOG("SP_DELREF", (p), (where), (tag)); \ 605 } while (0) 606 607 608 static inline void 609 key_sp_dead(struct secpolicy *sp) 610 { 611 612 /* mark the SP dead */ 613 sp->state = IPSEC_SPSTATE_DEAD; 614 } 615 616 static void 617 key_sp_unlink(struct secpolicy *sp) 618 { 619 620 /* remove from SP index */ 621 KASSERT(__LIST_CHAINED(sp)); 622 LIST_REMOVE(sp, chain); 623 /* Release refcount held just for being on chain */ 624 KEY_FREESP(&sp); 625 } 626 627 628 /* 629 * Return 0 when there are known to be no SP's for the specified 630 * direction. Otherwise return 1. This is used by IPsec code 631 * to optimize performance. 632 */ 633 int 634 key_havesp(u_int dir) 635 { 636 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 637 !LIST_EMPTY(&sptree[dir]) : 1); 638 } 639 640 /* %%% IPsec policy management */ 641 /* 642 * allocating a SP for OUTBOUND or INBOUND packet. 643 * Must call key_freesp() later. 644 * OUT: NULL: not found 645 * others: found and return the pointer. 646 */ 647 struct secpolicy * 648 key_lookup_sp_byspidx(const struct secpolicyindex *spidx, 649 u_int dir, const char* where, int tag) 650 { 651 struct secpolicy *sp; 652 int s; 653 654 KASSERT(spidx != NULL); 655 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 656 657 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 658 659 /* get a SP entry */ 660 s = splsoftnet(); /*called from softclock()*/ 661 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 662 printf("*** objects\n"); 663 kdebug_secpolicyindex(spidx); 664 } 665 666 LIST_FOREACH(sp, &sptree[dir], chain) { 667 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 668 printf("*** in SPD\n"); 669 kdebug_secpolicyindex(&sp->spidx); 670 } 671 672 if (sp->state == IPSEC_SPSTATE_DEAD) 673 continue; 674 if (key_spidx_match_withmask(&sp->spidx, spidx)) 675 goto found; 676 } 677 sp = NULL; 678 found: 679 if (sp) { 680 /* sanity check */ 681 KEY_CHKSPDIR(sp->spidx.dir, dir); 682 683 /* found a SPD entry */ 684 sp->lastused = time_uptime; 685 SP_ADDREF2(sp, where, tag); 686 } 687 splx(s); 688 689 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 690 "DP return SP:%p (ID=%u) refcnt %u\n", 691 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 692 return sp; 693 } 694 695 /* 696 * allocating a SP for OUTBOUND or INBOUND packet. 697 * Must call key_freesp() later. 698 * OUT: NULL: not found 699 * others: found and return the pointer. 700 */ 701 struct secpolicy * 702 key_lookup_sp(u_int32_t spi, 703 const union sockaddr_union *dst, 704 u_int8_t proto, 705 u_int dir, 706 const char* where, int tag) 707 { 708 struct secpolicy *sp; 709 int s; 710 711 KASSERT(dst != NULL); 712 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 713 714 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 715 716 /* get a SP entry */ 717 s = splsoftnet(); /*called from softclock()*/ 718 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 719 printf("*** objects\n"); 720 printf("spi %u proto %u dir %u\n", spi, proto, dir); 721 kdebug_sockaddr(&dst->sa); 722 } 723 724 LIST_FOREACH(sp, &sptree[dir], chain) { 725 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 726 printf("*** in SPD\n"); 727 kdebug_secpolicyindex(&sp->spidx); 728 } 729 730 if (sp->state == IPSEC_SPSTATE_DEAD) 731 continue; 732 /* compare simple values, then dst address */ 733 if (sp->spidx.ul_proto != proto) 734 continue; 735 /* NB: spi's must exist and match */ 736 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 737 continue; 738 if (key_sockaddr_match(&sp->spidx.dst.sa, &dst->sa, PORT_STRICT)) 739 goto found; 740 } 741 sp = NULL; 742 found: 743 if (sp) { 744 /* sanity check */ 745 KEY_CHKSPDIR(sp->spidx.dir, dir); 746 747 /* found a SPD entry */ 748 sp->lastused = time_uptime; 749 SP_ADDREF2(sp, where, tag); 750 } 751 splx(s); 752 753 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 754 "DP return SP:%p (ID=%u) refcnt %u\n", 755 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 756 return sp; 757 } 758 759 /* 760 * return a policy that matches this particular inbound packet. 761 * XXX slow 762 */ 763 struct secpolicy * 764 key_gettunnel(const struct sockaddr *osrc, 765 const struct sockaddr *odst, 766 const struct sockaddr *isrc, 767 const struct sockaddr *idst, 768 const char* where, int tag) 769 { 770 struct secpolicy *sp; 771 const int dir = IPSEC_DIR_INBOUND; 772 int s; 773 struct ipsecrequest *r1, *r2, *p; 774 struct secpolicyindex spidx; 775 776 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 777 778 if (isrc->sa_family != idst->sa_family) { 779 IPSECLOG(LOG_ERR, "protocol family mismatched %d != %d\n.", 780 isrc->sa_family, idst->sa_family); 781 sp = NULL; 782 goto done; 783 } 784 785 s = splsoftnet(); /*called from softclock()*/ 786 LIST_FOREACH(sp, &sptree[dir], chain) { 787 if (sp->state == IPSEC_SPSTATE_DEAD) 788 continue; 789 790 r1 = r2 = NULL; 791 for (p = sp->req; p; p = p->next) { 792 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 793 continue; 794 795 r1 = r2; 796 r2 = p; 797 798 if (!r1) { 799 /* here we look at address matches only */ 800 spidx = sp->spidx; 801 if (isrc->sa_len > sizeof(spidx.src) || 802 idst->sa_len > sizeof(spidx.dst)) 803 continue; 804 memcpy(&spidx.src, isrc, isrc->sa_len); 805 memcpy(&spidx.dst, idst, idst->sa_len); 806 if (!key_spidx_match_withmask(&sp->spidx, &spidx)) 807 continue; 808 } else { 809 if (!key_sockaddr_match(&r1->saidx.src.sa, isrc, PORT_NONE) || 810 !key_sockaddr_match(&r1->saidx.dst.sa, idst, PORT_NONE)) 811 continue; 812 } 813 814 if (!key_sockaddr_match(&r2->saidx.src.sa, osrc, PORT_NONE) || 815 !key_sockaddr_match(&r2->saidx.dst.sa, odst, PORT_NONE)) 816 continue; 817 818 goto found; 819 } 820 } 821 sp = NULL; 822 found: 823 if (sp) { 824 sp->lastused = time_uptime; 825 SP_ADDREF2(sp, where, tag); 826 } 827 splx(s); 828 done: 829 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 830 "DP return SP:%p (ID=%u) refcnt %u\n", 831 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 832 return sp; 833 } 834 835 /* 836 * allocating an SA entry for an *OUTBOUND* packet. 837 * checking each request entries in SP, and acquire an SA if need. 838 * OUT: 0: there are valid requests. 839 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 840 */ 841 int 842 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 843 { 844 u_int level; 845 int error; 846 struct secasvar *oldsav = NULL; 847 848 KASSERT(isr != NULL); 849 KASSERT(saidx != NULL); 850 KASSERTMSG(saidx->mode == IPSEC_MODE_TRANSPORT || 851 saidx->mode == IPSEC_MODE_TUNNEL, 852 "unexpected policy %u", saidx->mode); 853 854 /* get current level */ 855 level = ipsec_get_reqlevel(isr); 856 857 /* 858 * XXX guard against protocol callbacks from the crypto 859 * thread as they reference ipsecrequest.sav which we 860 * temporarily null out below. Need to rethink how we 861 * handle bundled SA's in the callback thread. 862 */ 863 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 864 #if 0 865 /* 866 * We do allocate new SA only if the state of SA in the holder is 867 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 868 */ 869 if (isr->sav != NULL) { 870 if (isr->sav->sah == NULL) 871 panic("key_checkrequest: sah is null"); 872 if (isr->sav == (struct secasvar *)LIST_FIRST( 873 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 874 KEY_FREESAV(&isr->sav); 875 isr->sav = NULL; 876 } 877 } 878 #else 879 /* 880 * we free any SA stashed in the IPsec request because a different 881 * SA may be involved each time this request is checked, either 882 * because new SAs are being configured, or this request is 883 * associated with an unconnected datagram socket, or this request 884 * is associated with a system default policy. 885 * 886 * The operation may have negative impact to performance. We may 887 * want to check cached SA carefully, rather than picking new SA 888 * every time. 889 */ 890 if (isr->sav != NULL) 891 oldsav = isr->sav; 892 #endif 893 894 /* 895 * new SA allocation if no SA found. 896 * key_allocsa_policy should allocate the oldest SA available. 897 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 898 */ 899 isr->sav = key_allocsa_policy(saidx); 900 membar_producer(); 901 if (oldsav != NULL) 902 KEY_FREESAV(&oldsav); 903 904 /* When there is SA. */ 905 if (isr->sav != NULL) { 906 if (isr->sav->state != SADB_SASTATE_MATURE && 907 isr->sav->state != SADB_SASTATE_DYING) 908 return EINVAL; 909 return 0; 910 } 911 912 /* there is no SA */ 913 error = key_acquire(saidx, isr->sp); 914 if (error != 0) { 915 /* XXX What should I do ? */ 916 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 917 error); 918 return error; 919 } 920 921 if (level != IPSEC_LEVEL_REQUIRE) { 922 /* XXX sigh, the interface to this routine is botched */ 923 KASSERTMSG(isr->sav == NULL, "unexpected SA"); 924 return 0; 925 } else { 926 return ENOENT; 927 } 928 } 929 930 /* 931 * allocating a SA for policy entry from SAD. 932 * NOTE: searching SAD of aliving state. 933 * OUT: NULL: not found. 934 * others: found and return the pointer. 935 */ 936 static struct secasvar * 937 key_allocsa_policy(const struct secasindex *saidx) 938 { 939 struct secashead *sah; 940 struct secasvar *sav; 941 u_int stateidx, state; 942 const u_int *saorder_state_valid; 943 int arraysize; 944 945 sah = key_getsah(saidx, CMP_MODE_REQID); 946 if (sah == NULL) 947 return NULL; 948 949 /* 950 * search a valid state list for outbound packet. 951 * This search order is important. 952 */ 953 if (key_prefered_oldsa) { 954 saorder_state_valid = saorder_state_valid_prefer_old; 955 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 956 } else { 957 saorder_state_valid = saorder_state_valid_prefer_new; 958 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 959 } 960 961 /* search valid state */ 962 for (stateidx = 0; 963 stateidx < arraysize; 964 stateidx++) { 965 966 state = saorder_state_valid[stateidx]; 967 968 sav = key_do_allocsa_policy(sah, state); 969 if (sav != NULL) 970 return sav; 971 } 972 973 return NULL; 974 } 975 976 /* 977 * searching SAD with direction, protocol, mode and state. 978 * called by key_allocsa_policy(). 979 * OUT: 980 * NULL : not found 981 * others : found, pointer to a SA. 982 */ 983 static struct secasvar * 984 key_do_allocsa_policy(struct secashead *sah, u_int state) 985 { 986 struct secasvar *sav, *candidate, *d; 987 988 /* initilize */ 989 candidate = NULL; 990 991 LIST_FOREACH(sav, &sah->savtree[state], chain) { 992 /* sanity check */ 993 KEY_CHKSASTATE(sav->state, state); 994 995 /* initialize */ 996 if (candidate == NULL) { 997 candidate = sav; 998 continue; 999 } 1000 1001 /* Which SA is the better ? */ 1002 1003 /* sanity check 2 */ 1004 KASSERT(candidate->lft_c != NULL); 1005 KASSERT(sav->lft_c != NULL); 1006 1007 /* What the best method is to compare ? */ 1008 if (key_prefered_oldsa) { 1009 if (candidate->lft_c->sadb_lifetime_addtime > 1010 sav->lft_c->sadb_lifetime_addtime) { 1011 candidate = sav; 1012 } 1013 continue; 1014 /*NOTREACHED*/ 1015 } 1016 1017 /* prefered new sa rather than old sa */ 1018 if (candidate->lft_c->sadb_lifetime_addtime < 1019 sav->lft_c->sadb_lifetime_addtime) { 1020 d = candidate; 1021 candidate = sav; 1022 } else 1023 d = sav; 1024 1025 /* 1026 * prepared to delete the SA when there is more 1027 * suitable candidate and the lifetime of the SA is not 1028 * permanent. 1029 */ 1030 if (d->lft_c->sadb_lifetime_addtime != 0) { 1031 struct mbuf *m, *result = 0; 1032 uint8_t satype; 1033 1034 key_sa_chgstate(d, SADB_SASTATE_DEAD); 1035 1036 KASSERT(d->refcnt > 0); 1037 1038 satype = key_proto2satype(d->sah->saidx.proto); 1039 if (satype == 0) 1040 goto msgfail; 1041 1042 m = key_setsadbmsg(SADB_DELETE, 0, 1043 satype, 0, 0, d->refcnt - 1); 1044 if (!m) 1045 goto msgfail; 1046 result = m; 1047 1048 /* set sadb_address for saidx's. */ 1049 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1050 &d->sah->saidx.src.sa, 1051 d->sah->saidx.src.sa.sa_len << 3, 1052 IPSEC_ULPROTO_ANY); 1053 if (!m) 1054 goto msgfail; 1055 m_cat(result, m); 1056 1057 /* set sadb_address for saidx's. */ 1058 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1059 &d->sah->saidx.src.sa, 1060 d->sah->saidx.src.sa.sa_len << 3, 1061 IPSEC_ULPROTO_ANY); 1062 if (!m) 1063 goto msgfail; 1064 m_cat(result, m); 1065 1066 /* create SA extension */ 1067 m = key_setsadbsa(d); 1068 if (!m) 1069 goto msgfail; 1070 m_cat(result, m); 1071 1072 if (result->m_len < sizeof(struct sadb_msg)) { 1073 result = m_pullup(result, 1074 sizeof(struct sadb_msg)); 1075 if (result == NULL) 1076 goto msgfail; 1077 } 1078 1079 result->m_pkthdr.len = 0; 1080 for (m = result; m; m = m->m_next) 1081 result->m_pkthdr.len += m->m_len; 1082 mtod(result, struct sadb_msg *)->sadb_msg_len = 1083 PFKEY_UNIT64(result->m_pkthdr.len); 1084 1085 key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 1086 result = 0; 1087 msgfail: 1088 if (result) 1089 m_freem(result); 1090 KEY_FREESAV(&d); 1091 } 1092 } 1093 1094 if (candidate) { 1095 SA_ADDREF(candidate); 1096 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1097 "DP cause refcnt++:%d SA:%p\n", 1098 candidate->refcnt, candidate); 1099 } 1100 return candidate; 1101 } 1102 1103 /* 1104 * allocating a usable SA entry for a *INBOUND* packet. 1105 * Must call key_freesav() later. 1106 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1107 * NULL: not found, or error occurred. 1108 * 1109 * In the comparison, no source address is used--for RFC2401 conformance. 1110 * To quote, from section 4.1: 1111 * A security association is uniquely identified by a triple consisting 1112 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1113 * security protocol (AH or ESP) identifier. 1114 * Note that, however, we do need to keep source address in IPsec SA. 1115 * IKE specification and PF_KEY specification do assume that we 1116 * keep source address in IPsec SA. We see a tricky situation here. 1117 * 1118 * sport and dport are used for NAT-T. network order is always used. 1119 */ 1120 struct secasvar * 1121 key_lookup_sa( 1122 const union sockaddr_union *dst, 1123 u_int proto, 1124 u_int32_t spi, 1125 u_int16_t sport, 1126 u_int16_t dport, 1127 const char* where, int tag) 1128 { 1129 struct secashead *sah; 1130 struct secasvar *sav; 1131 u_int stateidx, state; 1132 const u_int *saorder_state_valid; 1133 int arraysize, chkport; 1134 int s; 1135 1136 int must_check_spi = 1; 1137 int must_check_alg = 0; 1138 u_int16_t cpi = 0; 1139 u_int8_t algo = 0; 1140 1141 if ((sport != 0) && (dport != 0)) 1142 chkport = PORT_STRICT; 1143 else 1144 chkport = PORT_NONE; 1145 1146 KASSERT(dst != NULL); 1147 1148 /* 1149 * XXX IPCOMP case 1150 * We use cpi to define spi here. In the case where cpi <= 1151 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1152 * the real spi. In this case, don't check the spi but check the 1153 * algorithm 1154 */ 1155 1156 if (proto == IPPROTO_IPCOMP) { 1157 u_int32_t tmp; 1158 tmp = ntohl(spi); 1159 cpi = (u_int16_t) tmp; 1160 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1161 algo = (u_int8_t) cpi; 1162 must_check_spi = 0; 1163 must_check_alg = 1; 1164 } 1165 } 1166 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1167 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1168 where, tag, must_check_spi, must_check_alg); 1169 1170 1171 /* 1172 * searching SAD. 1173 * XXX: to be checked internal IP header somewhere. Also when 1174 * IPsec tunnel packet is received. But ESP tunnel mode is 1175 * encrypted so we can't check internal IP header. 1176 */ 1177 s = splsoftnet(); /*called from softclock()*/ 1178 if (key_prefered_oldsa) { 1179 saorder_state_valid = saorder_state_valid_prefer_old; 1180 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1181 } else { 1182 saorder_state_valid = saorder_state_valid_prefer_new; 1183 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1184 } 1185 LIST_FOREACH(sah, &sahtree, chain) { 1186 /* search valid state */ 1187 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1188 state = saorder_state_valid[stateidx]; 1189 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1190 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1191 "try match spi %#x, %#x\n", 1192 ntohl(spi), ntohl(sav->spi)); 1193 /* sanity check */ 1194 KEY_CHKSASTATE(sav->state, state); 1195 /* do not return entries w/ unusable state */ 1196 if (!SADB_SASTATE_USABLE_P(sav)) { 1197 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1198 "bad state %d\n", sav->state); 1199 continue; 1200 } 1201 if (proto != sav->sah->saidx.proto) { 1202 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1203 "proto fail %d != %d\n", 1204 proto, sav->sah->saidx.proto); 1205 continue; 1206 } 1207 if (must_check_spi && spi != sav->spi) { 1208 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1209 "spi fail %#x != %#x\n", 1210 ntohl(spi), ntohl(sav->spi)); 1211 continue; 1212 } 1213 /* XXX only on the ipcomp case */ 1214 if (must_check_alg && algo != sav->alg_comp) { 1215 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1216 "algo fail %d != %d\n", 1217 algo, sav->alg_comp); 1218 continue; 1219 } 1220 1221 #if 0 /* don't check src */ 1222 /* Fix port in src->sa */ 1223 1224 /* check src address */ 1225 if (!key_sockaddr_match(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE)) 1226 continue; 1227 #endif 1228 /* fix port of dst address XXX*/ 1229 key_porttosaddr(__UNCONST(dst), dport); 1230 /* check dst address */ 1231 if (!key_sockaddr_match(&dst->sa, &sav->sah->saidx.dst.sa, chkport)) 1232 continue; 1233 SA_ADDREF2(sav, where, tag); 1234 goto done; 1235 } 1236 } 1237 } 1238 sav = NULL; 1239 done: 1240 splx(s); 1241 1242 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1243 "DP return SA:%p; refcnt %u\n", sav, sav ? sav->refcnt : 0); 1244 return sav; 1245 } 1246 1247 void 1248 key_sp_ref(struct secpolicy *sp, const char* where, int tag) 1249 { 1250 1251 SP_ADDREF2(sp, where, tag); 1252 1253 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1254 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1255 sp, sp->id, where, tag, sp->refcnt); 1256 } 1257 1258 /* 1259 * Must be called after calling key_lookup_sp*(). 1260 * For both the packet without socket and key_freeso(). 1261 */ 1262 void 1263 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1264 { 1265 struct secpolicy *sp = *spp; 1266 unsigned int nv; 1267 1268 KASSERT(sp != NULL); 1269 1270 SP_DELREF2(sp, nv, where, tag); 1271 1272 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1273 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1274 sp, sp->id, where, tag, nv); 1275 1276 if (nv == 0) { 1277 *spp = NULL; 1278 key_delsp(sp); 1279 } 1280 } 1281 1282 #if 0 1283 /* 1284 * Must be called after calling key_lookup_sp*(). 1285 * For the packet with socket. 1286 */ 1287 static void 1288 key_freeso(struct socket *so) 1289 { 1290 /* sanity check */ 1291 KASSERT(so != NULL); 1292 1293 switch (so->so_proto->pr_domain->dom_family) { 1294 #ifdef INET 1295 case PF_INET: 1296 { 1297 struct inpcb *pcb = sotoinpcb(so); 1298 1299 /* Does it have a PCB ? */ 1300 if (pcb == NULL) 1301 return; 1302 1303 struct inpcbpolicy *sp = pcb->inp_sp; 1304 key_freesp_so(&sp->sp_in); 1305 key_freesp_so(&sp->sp_out); 1306 } 1307 break; 1308 #endif 1309 #ifdef INET6 1310 case PF_INET6: 1311 { 1312 #ifdef HAVE_NRL_INPCB 1313 struct inpcb *pcb = sotoinpcb(so); 1314 struct inpcbpolicy *sp = pcb->inp_sp; 1315 1316 /* Does it have a PCB ? */ 1317 if (pcb == NULL) 1318 return; 1319 key_freesp_so(&sp->sp_in); 1320 key_freesp_so(&sp->sp_out); 1321 #else 1322 struct in6pcb *pcb = sotoin6pcb(so); 1323 1324 /* Does it have a PCB ? */ 1325 if (pcb == NULL) 1326 return; 1327 key_freesp_so(&pcb->in6p_sp->sp_in); 1328 key_freesp_so(&pcb->in6p_sp->sp_out); 1329 #endif 1330 } 1331 break; 1332 #endif /* INET6 */ 1333 default: 1334 IPSECLOG(LOG_DEBUG, "unknown address family=%d.\n", 1335 so->so_proto->pr_domain->dom_family); 1336 return; 1337 } 1338 } 1339 1340 static void 1341 key_freesp_so(struct secpolicy **sp) 1342 { 1343 1344 KASSERT(sp != NULL); 1345 KASSERT(*sp != NULL); 1346 1347 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1348 (*sp)->policy == IPSEC_POLICY_BYPASS) 1349 return; 1350 1351 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1352 "invalid policy %u", (*sp)->policy); 1353 KEY_FREESP(sp); 1354 } 1355 #endif 1356 1357 /* 1358 * Must be called after calling key_lookup_sa(). 1359 * This function is called by key_freesp() to free some SA allocated 1360 * for a policy. 1361 */ 1362 void 1363 key_freesav(struct secasvar **psav, const char* where, int tag) 1364 { 1365 struct secasvar *sav = *psav; 1366 unsigned int nv; 1367 1368 KASSERT(sav != NULL); 1369 1370 SA_DELREF2(sav, nv, where, tag); 1371 1372 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1373 "DP SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1374 sav, (u_long)ntohl(sav->spi), where, tag, nv); 1375 1376 if (nv == 0) { 1377 *psav = NULL; 1378 key_delsav(sav); 1379 } 1380 } 1381 1382 /* %%% SPD management */ 1383 /* 1384 * free security policy entry. 1385 */ 1386 static void 1387 key_delsp(struct secpolicy *sp) 1388 { 1389 int s; 1390 1391 KASSERT(sp != NULL); 1392 1393 key_sp_dead(sp); 1394 1395 KASSERTMSG(sp->refcnt == 0, 1396 "SP with references deleted (refcnt %u)", sp->refcnt); 1397 1398 s = splsoftnet(); /*called from softclock()*/ 1399 1400 { 1401 struct ipsecrequest *isr = sp->req, *nextisr; 1402 1403 while (isr != NULL) { 1404 if (isr->sav != NULL) { 1405 KEY_FREESAV(&isr->sav); 1406 isr->sav = NULL; 1407 } 1408 1409 nextisr = isr->next; 1410 kmem_intr_free(isr, sizeof(*isr)); 1411 isr = nextisr; 1412 } 1413 } 1414 1415 kmem_intr_free(sp, sizeof(*sp)); 1416 1417 splx(s); 1418 } 1419 1420 /* 1421 * search SPD 1422 * OUT: NULL : not found 1423 * others : found, pointer to a SP. 1424 */ 1425 static struct secpolicy * 1426 key_getsp(const struct secpolicyindex *spidx) 1427 { 1428 struct secpolicy *sp; 1429 1430 KASSERT(spidx != NULL); 1431 1432 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1433 if (sp->state == IPSEC_SPSTATE_DEAD) 1434 continue; 1435 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1436 SP_ADDREF(sp); 1437 return sp; 1438 } 1439 } 1440 1441 return NULL; 1442 } 1443 1444 /* 1445 * get SP by index. 1446 * OUT: NULL : not found 1447 * others : found, pointer to a SP. 1448 */ 1449 static struct secpolicy * 1450 key_getspbyid(u_int32_t id) 1451 { 1452 struct secpolicy *sp; 1453 1454 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1455 if (sp->state == IPSEC_SPSTATE_DEAD) 1456 continue; 1457 if (sp->id == id) { 1458 SP_ADDREF(sp); 1459 return sp; 1460 } 1461 } 1462 1463 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1464 if (sp->state == IPSEC_SPSTATE_DEAD) 1465 continue; 1466 if (sp->id == id) { 1467 SP_ADDREF(sp); 1468 return sp; 1469 } 1470 } 1471 1472 return NULL; 1473 } 1474 1475 struct secpolicy * 1476 key_newsp(const char* where, int tag) 1477 { 1478 struct secpolicy *newsp = NULL; 1479 1480 newsp = kmem_intr_zalloc(sizeof(struct secpolicy), KM_NOSLEEP); 1481 if (newsp != NULL) 1482 newsp->refcnt = 1; 1483 1484 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1485 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1486 return newsp; 1487 } 1488 1489 /* 1490 * create secpolicy structure from sadb_x_policy structure. 1491 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1492 * so must be set properly later. 1493 */ 1494 struct secpolicy * 1495 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1496 { 1497 struct secpolicy *newsp; 1498 1499 KASSERT(!cpu_softintr_p()); 1500 KASSERT(xpl0 != NULL); 1501 KASSERT(len >= sizeof(*xpl0)); 1502 1503 if (len != PFKEY_EXTLEN(xpl0)) { 1504 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1505 *error = EINVAL; 1506 return NULL; 1507 } 1508 1509 newsp = KEY_NEWSP(); 1510 if (newsp == NULL) { 1511 *error = ENOBUFS; 1512 return NULL; 1513 } 1514 1515 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1516 newsp->policy = xpl0->sadb_x_policy_type; 1517 1518 /* check policy */ 1519 switch (xpl0->sadb_x_policy_type) { 1520 case IPSEC_POLICY_DISCARD: 1521 case IPSEC_POLICY_NONE: 1522 case IPSEC_POLICY_ENTRUST: 1523 case IPSEC_POLICY_BYPASS: 1524 newsp->req = NULL; 1525 *error = 0; 1526 return newsp; 1527 1528 case IPSEC_POLICY_IPSEC: 1529 /* Continued */ 1530 break; 1531 default: 1532 IPSECLOG(LOG_DEBUG, "invalid policy type.\n"); 1533 KEY_FREESP(&newsp); 1534 *error = EINVAL; 1535 return NULL; 1536 } 1537 1538 /* IPSEC_POLICY_IPSEC */ 1539 { 1540 int tlen; 1541 const struct sadb_x_ipsecrequest *xisr; 1542 uint16_t xisr_reqid; 1543 struct ipsecrequest **p_isr = &newsp->req; 1544 1545 /* validity check */ 1546 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1547 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1548 *error = EINVAL; 1549 goto free_exit; 1550 } 1551 1552 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1553 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1554 1555 while (tlen > 0) { 1556 /* length check */ 1557 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1558 IPSECLOG(LOG_DEBUG, "invalid ipsecrequest length.\n"); 1559 *error = EINVAL; 1560 goto free_exit; 1561 } 1562 1563 /* allocate request buffer */ 1564 *p_isr = kmem_zalloc(sizeof(**p_isr), KM_SLEEP); 1565 1566 /* set values */ 1567 (*p_isr)->next = NULL; 1568 1569 switch (xisr->sadb_x_ipsecrequest_proto) { 1570 case IPPROTO_ESP: 1571 case IPPROTO_AH: 1572 case IPPROTO_IPCOMP: 1573 break; 1574 default: 1575 IPSECLOG(LOG_DEBUG, "invalid proto type=%u\n", 1576 xisr->sadb_x_ipsecrequest_proto); 1577 *error = EPROTONOSUPPORT; 1578 goto free_exit; 1579 } 1580 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1581 1582 switch (xisr->sadb_x_ipsecrequest_mode) { 1583 case IPSEC_MODE_TRANSPORT: 1584 case IPSEC_MODE_TUNNEL: 1585 break; 1586 case IPSEC_MODE_ANY: 1587 default: 1588 IPSECLOG(LOG_DEBUG, "invalid mode=%u\n", 1589 xisr->sadb_x_ipsecrequest_mode); 1590 *error = EINVAL; 1591 goto free_exit; 1592 } 1593 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1594 1595 switch (xisr->sadb_x_ipsecrequest_level) { 1596 case IPSEC_LEVEL_DEFAULT: 1597 case IPSEC_LEVEL_USE: 1598 case IPSEC_LEVEL_REQUIRE: 1599 break; 1600 case IPSEC_LEVEL_UNIQUE: 1601 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1602 /* validity check */ 1603 /* 1604 * If range violation of reqid, kernel will 1605 * update it, don't refuse it. 1606 */ 1607 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1608 IPSECLOG(LOG_DEBUG, 1609 "reqid=%d range " 1610 "violation, updated by kernel.\n", 1611 xisr_reqid); 1612 xisr_reqid = 0; 1613 } 1614 1615 /* allocate new reqid id if reqid is zero. */ 1616 if (xisr_reqid == 0) { 1617 u_int16_t reqid = key_newreqid(); 1618 if (reqid == 0) { 1619 *error = ENOBUFS; 1620 goto free_exit; 1621 } 1622 (*p_isr)->saidx.reqid = reqid; 1623 } else { 1624 /* set it for manual keying. */ 1625 (*p_isr)->saidx.reqid = xisr_reqid; 1626 } 1627 break; 1628 1629 default: 1630 IPSECLOG(LOG_DEBUG, "invalid level=%u\n", 1631 xisr->sadb_x_ipsecrequest_level); 1632 *error = EINVAL; 1633 goto free_exit; 1634 } 1635 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1636 1637 /* set IP addresses if there */ 1638 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1639 const struct sockaddr *paddr; 1640 1641 paddr = (const struct sockaddr *)(xisr + 1); 1642 1643 /* validity check */ 1644 if (paddr->sa_len > sizeof((*p_isr)->saidx.src)) { 1645 IPSECLOG(LOG_DEBUG, "invalid request " 1646 "address length.\n"); 1647 *error = EINVAL; 1648 goto free_exit; 1649 } 1650 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1651 1652 paddr = (const struct sockaddr *)((const char *)paddr 1653 + paddr->sa_len); 1654 1655 /* validity check */ 1656 if (paddr->sa_len > sizeof((*p_isr)->saidx.dst)) { 1657 IPSECLOG(LOG_DEBUG, "invalid request " 1658 "address length.\n"); 1659 *error = EINVAL; 1660 goto free_exit; 1661 } 1662 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1663 } 1664 1665 (*p_isr)->sav = NULL; 1666 (*p_isr)->sp = newsp; 1667 1668 /* initialization for the next. */ 1669 p_isr = &(*p_isr)->next; 1670 tlen -= xisr->sadb_x_ipsecrequest_len; 1671 1672 /* validity check */ 1673 if (tlen < 0) { 1674 IPSECLOG(LOG_DEBUG, "becoming tlen < 0.\n"); 1675 *error = EINVAL; 1676 goto free_exit; 1677 } 1678 1679 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr + 1680 xisr->sadb_x_ipsecrequest_len); 1681 } 1682 } 1683 1684 *error = 0; 1685 return newsp; 1686 1687 free_exit: 1688 KEY_FREESP(&newsp); 1689 return NULL; 1690 } 1691 1692 static u_int16_t 1693 key_newreqid(void) 1694 { 1695 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1696 1697 auto_reqid = (auto_reqid == 0xffff ? 1698 IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1699 1700 /* XXX should be unique check */ 1701 1702 return auto_reqid; 1703 } 1704 1705 /* 1706 * copy secpolicy struct to sadb_x_policy structure indicated. 1707 */ 1708 struct mbuf * 1709 key_sp2msg(const struct secpolicy *sp) 1710 { 1711 struct sadb_x_policy *xpl; 1712 int tlen; 1713 char *p; 1714 struct mbuf *m; 1715 1716 KASSERT(sp != NULL); 1717 1718 tlen = key_getspreqmsglen(sp); 1719 1720 m = key_alloc_mbuf(tlen); 1721 if (!m || m->m_next) { /*XXX*/ 1722 if (m) 1723 m_freem(m); 1724 return NULL; 1725 } 1726 1727 m->m_len = tlen; 1728 m->m_next = NULL; 1729 xpl = mtod(m, struct sadb_x_policy *); 1730 memset(xpl, 0, tlen); 1731 1732 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1733 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1734 xpl->sadb_x_policy_type = sp->policy; 1735 xpl->sadb_x_policy_dir = sp->spidx.dir; 1736 xpl->sadb_x_policy_id = sp->id; 1737 p = (char *)xpl + sizeof(*xpl); 1738 1739 /* if is the policy for ipsec ? */ 1740 if (sp->policy == IPSEC_POLICY_IPSEC) { 1741 struct sadb_x_ipsecrequest *xisr; 1742 struct ipsecrequest *isr; 1743 1744 for (isr = sp->req; isr != NULL; isr = isr->next) { 1745 1746 xisr = (struct sadb_x_ipsecrequest *)p; 1747 1748 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1749 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1750 xisr->sadb_x_ipsecrequest_level = isr->level; 1751 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1752 1753 p += sizeof(*xisr); 1754 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1755 p += isr->saidx.src.sa.sa_len; 1756 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1757 p += isr->saidx.src.sa.sa_len; 1758 1759 xisr->sadb_x_ipsecrequest_len = 1760 PFKEY_ALIGN8(sizeof(*xisr) 1761 + isr->saidx.src.sa.sa_len 1762 + isr->saidx.dst.sa.sa_len); 1763 } 1764 } 1765 1766 return m; 1767 } 1768 1769 /* m will not be freed nor modified */ 1770 static struct mbuf * 1771 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1772 int ndeep, int nitem, ...) 1773 { 1774 va_list ap; 1775 int idx; 1776 int i; 1777 struct mbuf *result = NULL, *n; 1778 int len; 1779 1780 KASSERT(m != NULL); 1781 KASSERT(mhp != NULL); 1782 1783 va_start(ap, nitem); 1784 for (i = 0; i < nitem; i++) { 1785 idx = va_arg(ap, int); 1786 if (idx < 0 || idx > SADB_EXT_MAX) 1787 goto fail; 1788 /* don't attempt to pull empty extension */ 1789 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1790 continue; 1791 if (idx != SADB_EXT_RESERVED && 1792 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1793 continue; 1794 1795 if (idx == SADB_EXT_RESERVED) { 1796 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 1797 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1798 MGETHDR(n, M_DONTWAIT, MT_DATA); 1799 if (!n) 1800 goto fail; 1801 n->m_len = len; 1802 n->m_next = NULL; 1803 m_copydata(m, 0, sizeof(struct sadb_msg), 1804 mtod(n, void *)); 1805 } else if (i < ndeep) { 1806 len = mhp->extlen[idx]; 1807 n = key_alloc_mbuf(len); 1808 if (!n || n->m_next) { /*XXX*/ 1809 if (n) 1810 m_freem(n); 1811 goto fail; 1812 } 1813 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1814 mtod(n, void *)); 1815 } else { 1816 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1817 M_DONTWAIT); 1818 } 1819 if (n == NULL) 1820 goto fail; 1821 1822 if (result) 1823 m_cat(result, n); 1824 else 1825 result = n; 1826 } 1827 va_end(ap); 1828 1829 if (result && (result->m_flags & M_PKTHDR) != 0) { 1830 result->m_pkthdr.len = 0; 1831 for (n = result; n; n = n->m_next) 1832 result->m_pkthdr.len += n->m_len; 1833 } 1834 1835 return result; 1836 1837 fail: 1838 va_end(ap); 1839 m_freem(result); 1840 return NULL; 1841 } 1842 1843 /* 1844 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1845 * add an entry to SP database, when received 1846 * <base, address(SD), (lifetime(H),) policy> 1847 * from the user(?). 1848 * Adding to SP database, 1849 * and send 1850 * <base, address(SD), (lifetime(H),) policy> 1851 * to the socket which was send. 1852 * 1853 * SPDADD set a unique policy entry. 1854 * SPDSETIDX like SPDADD without a part of policy requests. 1855 * SPDUPDATE replace a unique policy entry. 1856 * 1857 * m will always be freed. 1858 */ 1859 static int 1860 key_api_spdadd(struct socket *so, struct mbuf *m, 1861 const struct sadb_msghdr *mhp) 1862 { 1863 const struct sockaddr *src, *dst; 1864 const struct sadb_x_policy *xpl0; 1865 struct sadb_x_policy *xpl; 1866 const struct sadb_lifetime *lft = NULL; 1867 struct secpolicyindex spidx; 1868 struct secpolicy *newsp; 1869 int error; 1870 1871 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1872 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1873 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1874 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1875 return key_senderror(so, m, EINVAL); 1876 } 1877 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1878 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1879 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1880 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1881 return key_senderror(so, m, EINVAL); 1882 } 1883 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1884 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < 1885 sizeof(struct sadb_lifetime)) { 1886 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1887 return key_senderror(so, m, EINVAL); 1888 } 1889 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1890 } 1891 1892 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1893 1894 /* checking the direciton. */ 1895 switch (xpl0->sadb_x_policy_dir) { 1896 case IPSEC_DIR_INBOUND: 1897 case IPSEC_DIR_OUTBOUND: 1898 break; 1899 default: 1900 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 1901 return key_senderror(so, m, EINVAL); 1902 } 1903 1904 /* check policy */ 1905 /* key_api_spdadd() accepts DISCARD, NONE and IPSEC. */ 1906 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST || 1907 xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1908 IPSECLOG(LOG_DEBUG, "Invalid policy type.\n"); 1909 return key_senderror(so, m, EINVAL); 1910 } 1911 1912 /* policy requests are mandatory when action is ipsec. */ 1913 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && 1914 xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 1915 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1916 IPSECLOG(LOG_DEBUG, "some policy requests part required.\n"); 1917 return key_senderror(so, m, EINVAL); 1918 } 1919 1920 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 1921 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 1922 1923 /* sanity check on addr pair */ 1924 if (src->sa_family != dst->sa_family) 1925 return key_senderror(so, m, EINVAL); 1926 if (src->sa_len != dst->sa_len) 1927 return key_senderror(so, m, EINVAL); 1928 1929 key_init_spidx_bymsghdr(&spidx, mhp); 1930 1931 /* 1932 * checking there is SP already or not. 1933 * SPDUPDATE doesn't depend on whether there is a SP or not. 1934 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1935 * then error. 1936 */ 1937 { 1938 struct secpolicy *sp; 1939 1940 sp = key_getsp(&spidx); 1941 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1942 if (sp) { 1943 key_sp_dead(sp); 1944 key_sp_unlink(sp); /* XXX jrs ordering */ 1945 KEY_FREESP(&sp); 1946 } 1947 } else { 1948 if (sp != NULL) { 1949 KEY_FREESP(&sp); 1950 IPSECLOG(LOG_DEBUG, "a SP entry exists already.\n"); 1951 return key_senderror(so, m, EEXIST); 1952 } 1953 } 1954 } 1955 1956 /* allocation new SP entry */ 1957 newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error); 1958 if (newsp == NULL) { 1959 return key_senderror(so, m, error); 1960 } 1961 1962 newsp->id = key_getnewspid(); 1963 if (newsp->id == 0) { 1964 kmem_free(newsp, sizeof(*newsp)); 1965 return key_senderror(so, m, ENOBUFS); 1966 } 1967 1968 newsp->spidx = spidx; 1969 newsp->created = time_uptime; 1970 newsp->lastused = newsp->created; 1971 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1972 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1973 1974 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1975 newsp->state = IPSEC_SPSTATE_ALIVE; 1976 if (newsp->policy == IPSEC_POLICY_IPSEC) 1977 KASSERT(newsp->req != NULL); 1978 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1979 1980 #ifdef notyet 1981 /* delete the entry in spacqtree */ 1982 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1983 struct secspacq *spacq = key_getspacq(&spidx); 1984 if (spacq != NULL) { 1985 /* reset counter in order to deletion by timehandler. */ 1986 spacq->created = time_uptime; 1987 spacq->count = 0; 1988 } 1989 } 1990 #endif 1991 1992 /* Invalidate all cached SPD pointers in the PCBs. */ 1993 ipsec_invalpcbcacheall(); 1994 1995 #if defined(GATEWAY) 1996 /* Invalidate the ipflow cache, as well. */ 1997 ipflow_invalidate_all(0); 1998 #ifdef INET6 1999 if (in6_present) 2000 ip6flow_invalidate_all(0); 2001 #endif /* INET6 */ 2002 #endif /* GATEWAY */ 2003 2004 { 2005 struct mbuf *n, *mpolicy; 2006 int off; 2007 2008 /* create new sadb_msg to reply. */ 2009 if (lft) { 2010 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 2011 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 2012 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2013 } else { 2014 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2015 SADB_X_EXT_POLICY, 2016 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2017 } 2018 if (!n) 2019 return key_senderror(so, m, ENOBUFS); 2020 2021 n = key_fill_replymsg(n, 0); 2022 if (n == NULL) 2023 return key_senderror(so, m, ENOBUFS); 2024 2025 off = 0; 2026 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2027 sizeof(*xpl), &off); 2028 if (mpolicy == NULL) { 2029 /* n is already freed */ 2030 return key_senderror(so, m, ENOBUFS); 2031 } 2032 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2033 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2034 m_freem(n); 2035 return key_senderror(so, m, EINVAL); 2036 } 2037 xpl->sadb_x_policy_id = newsp->id; 2038 2039 m_freem(m); 2040 key_update_used(); 2041 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2042 } 2043 } 2044 2045 /* 2046 * get new policy id. 2047 * OUT: 2048 * 0: failure. 2049 * others: success. 2050 */ 2051 static u_int32_t 2052 key_getnewspid(void) 2053 { 2054 u_int32_t newid = 0; 2055 int count = key_spi_trycnt; /* XXX */ 2056 struct secpolicy *sp; 2057 2058 /* when requesting to allocate spi ranged */ 2059 while (count--) { 2060 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2061 2062 sp = key_getspbyid(newid); 2063 if (sp == NULL) 2064 break; 2065 2066 KEY_FREESP(&sp); 2067 } 2068 2069 if (count == 0 || newid == 0) { 2070 IPSECLOG(LOG_DEBUG, "to allocate policy id is failed.\n"); 2071 return 0; 2072 } 2073 2074 return newid; 2075 } 2076 2077 /* 2078 * SADB_SPDDELETE processing 2079 * receive 2080 * <base, address(SD), policy(*)> 2081 * from the user(?), and set SADB_SASTATE_DEAD, 2082 * and send, 2083 * <base, address(SD), policy(*)> 2084 * to the ikmpd. 2085 * policy(*) including direction of policy. 2086 * 2087 * m will always be freed. 2088 */ 2089 static int 2090 key_api_spddelete(struct socket *so, struct mbuf *m, 2091 const struct sadb_msghdr *mhp) 2092 { 2093 struct sadb_x_policy *xpl0; 2094 struct secpolicyindex spidx; 2095 struct secpolicy *sp; 2096 2097 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2098 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2099 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2100 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2101 return key_senderror(so, m, EINVAL); 2102 } 2103 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2104 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2105 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2106 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2107 return key_senderror(so, m, EINVAL); 2108 } 2109 2110 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2111 2112 /* checking the direciton. */ 2113 switch (xpl0->sadb_x_policy_dir) { 2114 case IPSEC_DIR_INBOUND: 2115 case IPSEC_DIR_OUTBOUND: 2116 break; 2117 default: 2118 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2119 return key_senderror(so, m, EINVAL); 2120 } 2121 2122 /* make secindex */ 2123 key_init_spidx_bymsghdr(&spidx, mhp); 2124 2125 /* Is there SP in SPD ? */ 2126 sp = key_getsp(&spidx); 2127 if (sp == NULL) { 2128 IPSECLOG(LOG_DEBUG, "no SP found.\n"); 2129 return key_senderror(so, m, EINVAL); 2130 } 2131 2132 /* save policy id to buffer to be returned. */ 2133 xpl0->sadb_x_policy_id = sp->id; 2134 2135 key_sp_dead(sp); 2136 key_sp_unlink(sp); /* XXX jrs ordering */ 2137 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2138 2139 /* Invalidate all cached SPD pointers in the PCBs. */ 2140 ipsec_invalpcbcacheall(); 2141 2142 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2143 2144 { 2145 struct mbuf *n; 2146 2147 /* create new sadb_msg to reply. */ 2148 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2149 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2150 if (!n) 2151 return key_senderror(so, m, ENOBUFS); 2152 2153 n = key_fill_replymsg(n, 0); 2154 if (n == NULL) 2155 return key_senderror(so, m, ENOBUFS); 2156 2157 m_freem(m); 2158 key_update_used(); 2159 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2160 } 2161 } 2162 2163 /* 2164 * SADB_SPDDELETE2 processing 2165 * receive 2166 * <base, policy(*)> 2167 * from the user(?), and set SADB_SASTATE_DEAD, 2168 * and send, 2169 * <base, policy(*)> 2170 * to the ikmpd. 2171 * policy(*) including direction of policy. 2172 * 2173 * m will always be freed. 2174 */ 2175 static int 2176 key_api_spddelete2(struct socket *so, struct mbuf *m, 2177 const struct sadb_msghdr *mhp) 2178 { 2179 u_int32_t id; 2180 struct secpolicy *sp; 2181 2182 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2183 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2184 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2185 return key_senderror(so, m, EINVAL); 2186 } 2187 2188 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2189 2190 /* Is there SP in SPD ? */ 2191 sp = key_getspbyid(id); 2192 if (sp == NULL) { 2193 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2194 return key_senderror(so, m, EINVAL); 2195 } 2196 2197 key_sp_dead(sp); 2198 key_sp_unlink(sp); /* XXX jrs ordering */ 2199 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2200 sp = NULL; 2201 2202 /* Invalidate all cached SPD pointers in the PCBs. */ 2203 ipsec_invalpcbcacheall(); 2204 2205 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2206 2207 { 2208 struct mbuf *n, *nn; 2209 int off, len; 2210 2211 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 2212 2213 /* create new sadb_msg to reply. */ 2214 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2215 2216 MGETHDR(n, M_DONTWAIT, MT_DATA); 2217 if (n && len > MHLEN) { 2218 MCLGET(n, M_DONTWAIT); 2219 if ((n->m_flags & M_EXT) == 0) { 2220 m_freem(n); 2221 n = NULL; 2222 } 2223 } 2224 if (!n) 2225 return key_senderror(so, m, ENOBUFS); 2226 2227 n->m_len = len; 2228 n->m_next = NULL; 2229 off = 0; 2230 2231 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2232 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2233 2234 KASSERTMSG(off == len, "length inconsistency"); 2235 2236 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2237 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2238 if (!n->m_next) { 2239 m_freem(n); 2240 return key_senderror(so, m, ENOBUFS); 2241 } 2242 2243 n->m_pkthdr.len = 0; 2244 for (nn = n; nn; nn = nn->m_next) 2245 n->m_pkthdr.len += nn->m_len; 2246 2247 n = key_fill_replymsg(n, 0); 2248 if (n == NULL) 2249 return key_senderror(so, m, ENOBUFS); 2250 2251 m_freem(m); 2252 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2253 } 2254 } 2255 2256 /* 2257 * SADB_X_GET processing 2258 * receive 2259 * <base, policy(*)> 2260 * from the user(?), 2261 * and send, 2262 * <base, address(SD), policy> 2263 * to the ikmpd. 2264 * policy(*) including direction of policy. 2265 * 2266 * m will always be freed. 2267 */ 2268 static int 2269 key_api_spdget(struct socket *so, struct mbuf *m, 2270 const struct sadb_msghdr *mhp) 2271 { 2272 u_int32_t id; 2273 struct secpolicy *sp; 2274 struct mbuf *n; 2275 2276 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2277 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2278 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2279 return key_senderror(so, m, EINVAL); 2280 } 2281 2282 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2283 2284 /* Is there SP in SPD ? */ 2285 sp = key_getspbyid(id); 2286 if (sp == NULL) { 2287 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2288 return key_senderror(so, m, ENOENT); 2289 } 2290 2291 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2292 mhp->msg->sadb_msg_pid); 2293 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2294 if (n != NULL) { 2295 m_freem(m); 2296 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2297 } else 2298 return key_senderror(so, m, ENOBUFS); 2299 } 2300 2301 #ifdef notyet 2302 /* 2303 * SADB_X_SPDACQUIRE processing. 2304 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2305 * send 2306 * <base, policy(*)> 2307 * to KMD, and expect to receive 2308 * <base> with SADB_X_SPDACQUIRE if error occurred, 2309 * or 2310 * <base, policy> 2311 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2312 * policy(*) is without policy requests. 2313 * 2314 * 0 : succeed 2315 * others: error number 2316 */ 2317 int 2318 key_spdacquire(const struct secpolicy *sp) 2319 { 2320 struct mbuf *result = NULL, *m; 2321 struct secspacq *newspacq; 2322 int error; 2323 2324 KASSERT(sp != NULL); 2325 KASSERTMSG(sp->req == NULL, "called but there is request"); 2326 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2327 "policy mismathed. IPsec is expected"); 2328 2329 /* Get an entry to check whether sent message or not. */ 2330 newspacq = key_getspacq(&sp->spidx); 2331 if (newspacq != NULL) { 2332 if (key_blockacq_count < newspacq->count) { 2333 /* reset counter and do send message. */ 2334 newspacq->count = 0; 2335 } else { 2336 /* increment counter and do nothing. */ 2337 newspacq->count++; 2338 return 0; 2339 } 2340 } else { 2341 /* make new entry for blocking to send SADB_ACQUIRE. */ 2342 newspacq = key_newspacq(&sp->spidx); 2343 if (newspacq == NULL) 2344 return ENOBUFS; 2345 2346 /* add to acqtree */ 2347 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2348 } 2349 2350 /* create new sadb_msg to reply. */ 2351 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2352 if (!m) { 2353 error = ENOBUFS; 2354 goto fail; 2355 } 2356 result = m; 2357 2358 result->m_pkthdr.len = 0; 2359 for (m = result; m; m = m->m_next) 2360 result->m_pkthdr.len += m->m_len; 2361 2362 mtod(result, struct sadb_msg *)->sadb_msg_len = 2363 PFKEY_UNIT64(result->m_pkthdr.len); 2364 2365 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2366 2367 fail: 2368 if (result) 2369 m_freem(result); 2370 return error; 2371 } 2372 #endif /* notyet */ 2373 2374 /* 2375 * SADB_SPDFLUSH processing 2376 * receive 2377 * <base> 2378 * from the user, and free all entries in secpctree. 2379 * and send, 2380 * <base> 2381 * to the user. 2382 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2383 * 2384 * m will always be freed. 2385 */ 2386 static int 2387 key_api_spdflush(struct socket *so, struct mbuf *m, 2388 const struct sadb_msghdr *mhp) 2389 { 2390 struct sadb_msg *newmsg; 2391 struct secpolicy *sp; 2392 u_int dir; 2393 2394 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2395 return key_senderror(so, m, EINVAL); 2396 2397 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2398 struct secpolicy * nextsp; 2399 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 2400 if (sp->state == IPSEC_SPSTATE_DEAD) 2401 continue; 2402 key_sp_dead(sp); 2403 key_sp_unlink(sp); 2404 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2405 continue; 2406 } 2407 } 2408 2409 /* Invalidate all cached SPD pointers in the PCBs. */ 2410 ipsec_invalpcbcacheall(); 2411 2412 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2413 2414 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2415 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 2416 return key_senderror(so, m, ENOBUFS); 2417 } 2418 2419 if (m->m_next) 2420 m_freem(m->m_next); 2421 m->m_next = NULL; 2422 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2423 newmsg = mtod(m, struct sadb_msg *); 2424 newmsg->sadb_msg_errno = 0; 2425 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2426 2427 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2428 } 2429 2430 static struct sockaddr key_src = { 2431 .sa_len = 2, 2432 .sa_family = PF_KEY, 2433 }; 2434 2435 static struct mbuf * 2436 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2437 { 2438 struct secpolicy *sp; 2439 int cnt; 2440 u_int dir; 2441 struct mbuf *m, *n, *prev; 2442 int totlen; 2443 2444 *lenp = 0; 2445 2446 /* search SPD entry and get buffer size. */ 2447 cnt = 0; 2448 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2449 LIST_FOREACH(sp, &sptree[dir], chain) { 2450 cnt++; 2451 } 2452 } 2453 2454 if (cnt == 0) { 2455 *errorp = ENOENT; 2456 return (NULL); 2457 } 2458 2459 m = NULL; 2460 prev = m; 2461 totlen = 0; 2462 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2463 LIST_FOREACH(sp, &sptree[dir], chain) { 2464 --cnt; 2465 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2466 2467 if (!n) { 2468 *errorp = ENOBUFS; 2469 if (m) 2470 m_freem(m); 2471 return (NULL); 2472 } 2473 2474 totlen += n->m_pkthdr.len; 2475 if (!m) { 2476 m = n; 2477 } else { 2478 prev->m_nextpkt = n; 2479 } 2480 prev = n; 2481 } 2482 } 2483 2484 *lenp = totlen; 2485 *errorp = 0; 2486 return (m); 2487 } 2488 2489 /* 2490 * SADB_SPDDUMP processing 2491 * receive 2492 * <base> 2493 * from the user, and dump all SP leaves 2494 * and send, 2495 * <base> ..... 2496 * to the ikmpd. 2497 * 2498 * m will always be freed. 2499 */ 2500 static int 2501 key_api_spddump(struct socket *so, struct mbuf *m0, 2502 const struct sadb_msghdr *mhp) 2503 { 2504 struct mbuf *n; 2505 int error, len; 2506 int ok, s; 2507 pid_t pid; 2508 2509 pid = mhp->msg->sadb_msg_pid; 2510 /* 2511 * If the requestor has insufficient socket-buffer space 2512 * for the entire chain, nobody gets any response to the DUMP. 2513 * XXX For now, only the requestor ever gets anything. 2514 * Moreover, if the requestor has any space at all, they receive 2515 * the entire chain, otherwise the request is refused with ENOBUFS. 2516 */ 2517 if (sbspace(&so->so_rcv) <= 0) { 2518 return key_senderror(so, m0, ENOBUFS); 2519 } 2520 2521 s = splsoftnet(); 2522 n = key_setspddump_chain(&error, &len, pid); 2523 splx(s); 2524 2525 if (n == NULL) { 2526 return key_senderror(so, m0, ENOENT); 2527 } 2528 { 2529 uint64_t *ps = PFKEY_STAT_GETREF(); 2530 ps[PFKEY_STAT_IN_TOTAL]++; 2531 ps[PFKEY_STAT_IN_BYTES] += len; 2532 PFKEY_STAT_PUTREF(); 2533 } 2534 2535 /* 2536 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2537 * The requestor receives either the entire chain, or an 2538 * error message with ENOBUFS. 2539 */ 2540 2541 /* 2542 * sbappendchainwith record takes the chain of entries, one 2543 * packet-record per SPD entry, prepends the key_src sockaddr 2544 * to each packet-record, links the sockaddr mbufs into a new 2545 * list of records, then appends the entire resulting 2546 * list to the requesting socket. 2547 */ 2548 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 2549 SB_PRIO_ONESHOT_OVERFLOW); 2550 2551 if (!ok) { 2552 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2553 m_freem(n); 2554 return key_senderror(so, m0, ENOBUFS); 2555 } 2556 2557 m_freem(m0); 2558 return error; 2559 } 2560 2561 /* 2562 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2563 */ 2564 static int 2565 key_api_nat_map(struct socket *so, struct mbuf *m, 2566 const struct sadb_msghdr *mhp) 2567 { 2568 struct sadb_x_nat_t_type *type; 2569 struct sadb_x_nat_t_port *sport; 2570 struct sadb_x_nat_t_port *dport; 2571 struct sadb_address *iaddr, *raddr; 2572 struct sadb_x_nat_t_frag *frag; 2573 2574 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2575 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2576 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2577 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2578 return key_senderror(so, m, EINVAL); 2579 } 2580 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2581 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2582 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2583 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2584 return key_senderror(so, m, EINVAL); 2585 } 2586 2587 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2588 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2589 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2590 return key_senderror(so, m, EINVAL); 2591 } 2592 2593 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2594 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2595 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2596 return key_senderror(so, m, EINVAL); 2597 } 2598 2599 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2600 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2601 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2602 return key_senderror(so, m, EINVAL); 2603 } 2604 2605 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2606 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2607 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2608 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2609 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2610 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2611 2612 /* 2613 * XXX handle that, it should also contain a SA, or anything 2614 * that enable to update the SA information. 2615 */ 2616 2617 return 0; 2618 } 2619 2620 static struct mbuf * 2621 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2622 { 2623 struct mbuf *result = NULL, *m; 2624 2625 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2626 if (!m) 2627 goto fail; 2628 result = m; 2629 2630 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2631 &sp->spidx.src.sa, sp->spidx.prefs, sp->spidx.ul_proto); 2632 if (!m) 2633 goto fail; 2634 m_cat(result, m); 2635 2636 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2637 &sp->spidx.dst.sa, sp->spidx.prefd, sp->spidx.ul_proto); 2638 if (!m) 2639 goto fail; 2640 m_cat(result, m); 2641 2642 m = key_sp2msg(sp); 2643 if (!m) 2644 goto fail; 2645 m_cat(result, m); 2646 2647 if ((result->m_flags & M_PKTHDR) == 0) 2648 goto fail; 2649 2650 if (result->m_len < sizeof(struct sadb_msg)) { 2651 result = m_pullup(result, sizeof(struct sadb_msg)); 2652 if (result == NULL) 2653 goto fail; 2654 } 2655 2656 result->m_pkthdr.len = 0; 2657 for (m = result; m; m = m->m_next) 2658 result->m_pkthdr.len += m->m_len; 2659 2660 mtod(result, struct sadb_msg *)->sadb_msg_len = 2661 PFKEY_UNIT64(result->m_pkthdr.len); 2662 2663 return result; 2664 2665 fail: 2666 m_freem(result); 2667 return NULL; 2668 } 2669 2670 /* 2671 * get PFKEY message length for security policy and request. 2672 */ 2673 static u_int 2674 key_getspreqmsglen(const struct secpolicy *sp) 2675 { 2676 u_int tlen; 2677 2678 tlen = sizeof(struct sadb_x_policy); 2679 2680 /* if is the policy for ipsec ? */ 2681 if (sp->policy != IPSEC_POLICY_IPSEC) 2682 return tlen; 2683 2684 /* get length of ipsec requests */ 2685 { 2686 const struct ipsecrequest *isr; 2687 int len; 2688 2689 for (isr = sp->req; isr != NULL; isr = isr->next) { 2690 len = sizeof(struct sadb_x_ipsecrequest) 2691 + isr->saidx.src.sa.sa_len + isr->saidx.dst.sa.sa_len; 2692 2693 tlen += PFKEY_ALIGN8(len); 2694 } 2695 } 2696 2697 return tlen; 2698 } 2699 2700 /* 2701 * SADB_SPDEXPIRE processing 2702 * send 2703 * <base, address(SD), lifetime(CH), policy> 2704 * to KMD by PF_KEY. 2705 * 2706 * OUT: 0 : succeed 2707 * others : error number 2708 */ 2709 static int 2710 key_spdexpire(struct secpolicy *sp) 2711 { 2712 int s; 2713 struct mbuf *result = NULL, *m; 2714 int len; 2715 int error = -1; 2716 struct sadb_lifetime *lt; 2717 2718 /* XXX: Why do we lock ? */ 2719 s = splsoftnet(); /*called from softclock()*/ 2720 2721 KASSERT(sp != NULL); 2722 2723 /* set msg header */ 2724 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2725 if (!m) { 2726 error = ENOBUFS; 2727 goto fail; 2728 } 2729 result = m; 2730 2731 /* create lifetime extension (current and hard) */ 2732 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2733 m = key_alloc_mbuf(len); 2734 if (!m || m->m_next) { /*XXX*/ 2735 if (m) 2736 m_freem(m); 2737 error = ENOBUFS; 2738 goto fail; 2739 } 2740 memset(mtod(m, void *), 0, len); 2741 lt = mtod(m, struct sadb_lifetime *); 2742 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2743 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2744 lt->sadb_lifetime_allocations = 0; 2745 lt->sadb_lifetime_bytes = 0; 2746 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2747 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2748 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2749 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2750 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2751 lt->sadb_lifetime_allocations = 0; 2752 lt->sadb_lifetime_bytes = 0; 2753 lt->sadb_lifetime_addtime = sp->lifetime; 2754 lt->sadb_lifetime_usetime = sp->validtime; 2755 m_cat(result, m); 2756 2757 /* set sadb_address for source */ 2758 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sp->spidx.src.sa, 2759 sp->spidx.prefs, sp->spidx.ul_proto); 2760 if (!m) { 2761 error = ENOBUFS; 2762 goto fail; 2763 } 2764 m_cat(result, m); 2765 2766 /* set sadb_address for destination */ 2767 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sp->spidx.dst.sa, 2768 sp->spidx.prefd, sp->spidx.ul_proto); 2769 if (!m) { 2770 error = ENOBUFS; 2771 goto fail; 2772 } 2773 m_cat(result, m); 2774 2775 /* set secpolicy */ 2776 m = key_sp2msg(sp); 2777 if (!m) { 2778 error = ENOBUFS; 2779 goto fail; 2780 } 2781 m_cat(result, m); 2782 2783 if ((result->m_flags & M_PKTHDR) == 0) { 2784 error = EINVAL; 2785 goto fail; 2786 } 2787 2788 if (result->m_len < sizeof(struct sadb_msg)) { 2789 result = m_pullup(result, sizeof(struct sadb_msg)); 2790 if (result == NULL) { 2791 error = ENOBUFS; 2792 goto fail; 2793 } 2794 } 2795 2796 result->m_pkthdr.len = 0; 2797 for (m = result; m; m = m->m_next) 2798 result->m_pkthdr.len += m->m_len; 2799 2800 mtod(result, struct sadb_msg *)->sadb_msg_len = 2801 PFKEY_UNIT64(result->m_pkthdr.len); 2802 2803 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2804 2805 fail: 2806 if (result) 2807 m_freem(result); 2808 splx(s); 2809 return error; 2810 } 2811 2812 /* %%% SAD management */ 2813 /* 2814 * allocating a memory for new SA head, and copy from the values of mhp. 2815 * OUT: NULL : failure due to the lack of memory. 2816 * others : pointer to new SA head. 2817 */ 2818 static struct secashead * 2819 key_newsah(const struct secasindex *saidx) 2820 { 2821 struct secashead *newsah; 2822 int i; 2823 2824 KASSERT(saidx != NULL); 2825 2826 newsah = kmem_zalloc(sizeof(struct secashead), KM_SLEEP); 2827 for (i = 0; i < __arraycount(newsah->savtree); i++) 2828 LIST_INIT(&newsah->savtree[i]); 2829 newsah->saidx = *saidx; 2830 2831 /* add to saidxtree */ 2832 newsah->state = SADB_SASTATE_MATURE; 2833 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2834 2835 return newsah; 2836 } 2837 2838 /* 2839 * delete SA index and all SA registerd. 2840 */ 2841 static void 2842 key_delsah(struct secashead *sah) 2843 { 2844 struct secasvar *sav, *nextsav; 2845 u_int state; 2846 int s; 2847 int zombie = 0; 2848 2849 KASSERT(!cpu_softintr_p()); 2850 KASSERT(sah != NULL); 2851 2852 s = splsoftnet(); 2853 2854 /* searching all SA registerd in the secindex. */ 2855 SASTATE_ANY_FOREACH(state) { 2856 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2857 if (sav->refcnt == 0) { 2858 /* sanity check */ 2859 KEY_CHKSASTATE(state, sav->state); 2860 KEY_FREESAV(&sav); 2861 } else { 2862 /* give up to delete this sa */ 2863 zombie++; 2864 } 2865 } 2866 } 2867 2868 /* don't delete sah only if there are savs. */ 2869 if (zombie) { 2870 splx(s); 2871 return; 2872 } 2873 2874 rtcache_free(&sah->sa_route); 2875 2876 /* remove from tree of SA index */ 2877 KASSERT(__LIST_CHAINED(sah)); 2878 LIST_REMOVE(sah, chain); 2879 2880 if (sah->idents != NULL) 2881 kmem_free(sah->idents, sah->idents_len); 2882 if (sah->identd != NULL) 2883 kmem_free(sah->identd, sah->identd_len); 2884 2885 kmem_free(sah, sizeof(*sah)); 2886 2887 splx(s); 2888 return; 2889 } 2890 2891 /* 2892 * allocating a new SA with LARVAL state. 2893 * key_api_add() and key_api_getspi() call, 2894 * and copy the values of mhp into new buffer. 2895 * When SAD message type is GETSPI: 2896 * to set sequence number from acq_seq++, 2897 * to set zero to SPI. 2898 * not to call key_setsava(). 2899 * OUT: NULL : fail 2900 * others : pointer to new secasvar. 2901 * 2902 * does not modify mbuf. does not free mbuf on error. 2903 */ 2904 static struct secasvar * 2905 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2906 struct secashead *sah, int *errp, 2907 const char* where, int tag) 2908 { 2909 struct secasvar *newsav; 2910 const struct sadb_sa *xsa; 2911 2912 KASSERT(!cpu_softintr_p()); 2913 KASSERT(m != NULL); 2914 KASSERT(mhp != NULL); 2915 KASSERT(mhp->msg != NULL); 2916 KASSERT(sah != NULL); 2917 2918 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 2919 2920 switch (mhp->msg->sadb_msg_type) { 2921 case SADB_GETSPI: 2922 newsav->spi = 0; 2923 2924 #ifdef IPSEC_DOSEQCHECK 2925 /* sync sequence number */ 2926 if (mhp->msg->sadb_msg_seq == 0) 2927 newsav->seq = 2928 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2929 else 2930 #endif 2931 newsav->seq = mhp->msg->sadb_msg_seq; 2932 break; 2933 2934 case SADB_ADD: 2935 /* sanity check */ 2936 if (mhp->ext[SADB_EXT_SA] == NULL) { 2937 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2938 *errp = EINVAL; 2939 goto error; 2940 } 2941 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2942 newsav->spi = xsa->sadb_sa_spi; 2943 newsav->seq = mhp->msg->sadb_msg_seq; 2944 break; 2945 default: 2946 *errp = EINVAL; 2947 goto error; 2948 } 2949 2950 /* copy sav values */ 2951 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2952 *errp = key_setsaval(newsav, m, mhp); 2953 if (*errp) 2954 goto error; 2955 } 2956 2957 /* reset created */ 2958 newsav->created = time_uptime; 2959 newsav->pid = mhp->msg->sadb_msg_pid; 2960 2961 /* add to satree */ 2962 newsav->sah = sah; 2963 newsav->refcnt = 1; 2964 newsav->state = SADB_SASTATE_LARVAL; 2965 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2966 secasvar, chain); 2967 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 2968 "DP from %s:%u return SA:%p\n", where, tag, newsav); 2969 return newsav; 2970 2971 error: 2972 KASSERT(*errp != 0); 2973 kmem_free(newsav, sizeof(*newsav)); 2974 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 2975 "DP from %s:%u return SA:NULL\n", where, tag); 2976 return NULL; 2977 } 2978 2979 2980 static void 2981 key_clear_xform(struct secasvar *sav) 2982 { 2983 2984 /* 2985 * Cleanup xform state. Note that zeroize'ing causes the 2986 * keys to be cleared; otherwise we must do it ourself. 2987 */ 2988 if (sav->tdb_xform != NULL) { 2989 sav->tdb_xform->xf_zeroize(sav); 2990 sav->tdb_xform = NULL; 2991 } else { 2992 if (sav->key_auth != NULL) 2993 explicit_memset(_KEYBUF(sav->key_auth), 0, 2994 _KEYLEN(sav->key_auth)); 2995 if (sav->key_enc != NULL) 2996 explicit_memset(_KEYBUF(sav->key_enc), 0, 2997 _KEYLEN(sav->key_enc)); 2998 } 2999 } 3000 3001 /* 3002 * free() SA variable entry. 3003 */ 3004 static void 3005 key_delsav(struct secasvar *sav) 3006 { 3007 3008 KASSERT(sav != NULL); 3009 KASSERTMSG(sav->refcnt == 0, "reference count %u > 0", sav->refcnt); 3010 3011 /* remove from SA header */ 3012 KASSERT(__LIST_CHAINED(sav)); 3013 LIST_REMOVE(sav, chain); 3014 3015 key_clear_xform(sav); 3016 key_freesaval(sav); 3017 kmem_intr_free(sav, sizeof(*sav)); 3018 3019 return; 3020 } 3021 3022 /* 3023 * search SAD. 3024 * OUT: 3025 * NULL : not found 3026 * others : found, pointer to a SA. 3027 */ 3028 static struct secashead * 3029 key_getsah(const struct secasindex *saidx, int flag) 3030 { 3031 struct secashead *sah; 3032 3033 LIST_FOREACH(sah, &sahtree, chain) { 3034 if (sah->state == SADB_SASTATE_DEAD) 3035 continue; 3036 if (key_saidx_match(&sah->saidx, saidx, flag)) 3037 return sah; 3038 } 3039 3040 return NULL; 3041 } 3042 3043 /* 3044 * check not to be duplicated SPI. 3045 * NOTE: this function is too slow due to searching all SAD. 3046 * OUT: 3047 * NULL : not found 3048 * others : found, pointer to a SA. 3049 */ 3050 static struct secasvar * 3051 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3052 { 3053 struct secashead *sah; 3054 struct secasvar *sav; 3055 3056 /* check address family */ 3057 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3058 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 3059 return NULL; 3060 } 3061 3062 /* check all SAD */ 3063 LIST_FOREACH(sah, &sahtree, chain) { 3064 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3065 continue; 3066 sav = key_getsavbyspi(sah, spi); 3067 if (sav != NULL) 3068 return sav; 3069 } 3070 3071 return NULL; 3072 } 3073 3074 /* 3075 * search SAD litmited alive SA, protocol, SPI. 3076 * OUT: 3077 * NULL : not found 3078 * others : found, pointer to a SA. 3079 */ 3080 static struct secasvar * 3081 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3082 { 3083 struct secasvar *sav; 3084 u_int state; 3085 3086 /* search all status */ 3087 SASTATE_ALIVE_FOREACH(state) { 3088 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3089 3090 /* sanity check */ 3091 if (sav->state != state) { 3092 IPSECLOG(LOG_DEBUG, 3093 "invalid sav->state (queue: %d SA: %d)\n", 3094 state, sav->state); 3095 continue; 3096 } 3097 3098 if (sav->spi == spi) 3099 return sav; 3100 } 3101 } 3102 3103 return NULL; 3104 } 3105 3106 /* 3107 * Free allocated data to member variables of sav: 3108 * sav->replay, sav->key_* and sav->lft_*. 3109 */ 3110 static void 3111 key_freesaval(struct secasvar *sav) 3112 { 3113 3114 if (sav->replay != NULL) { 3115 kmem_intr_free(sav->replay, sav->replay_len); 3116 sav->replay = NULL; 3117 sav->replay_len = 0; 3118 } 3119 if (sav->key_auth != NULL) { 3120 kmem_intr_free(sav->key_auth, sav->key_auth_len); 3121 sav->key_auth = NULL; 3122 sav->key_auth_len = 0; 3123 } 3124 if (sav->key_enc != NULL) { 3125 kmem_intr_free(sav->key_enc, sav->key_enc_len); 3126 sav->key_enc = NULL; 3127 sav->key_enc_len = 0; 3128 } 3129 if (sav->lft_c != NULL) { 3130 kmem_intr_free(sav->lft_c, sizeof(*(sav->lft_c))); 3131 sav->lft_c = NULL; 3132 } 3133 if (sav->lft_h != NULL) { 3134 kmem_intr_free(sav->lft_h, sizeof(*(sav->lft_h))); 3135 sav->lft_h = NULL; 3136 } 3137 if (sav->lft_s != NULL) { 3138 kmem_intr_free(sav->lft_s, sizeof(*(sav->lft_s))); 3139 sav->lft_s = NULL; 3140 } 3141 } 3142 3143 /* 3144 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3145 * You must update these if need. 3146 * OUT: 0: success. 3147 * !0: failure. 3148 * 3149 * does not modify mbuf. does not free mbuf on error. 3150 */ 3151 static int 3152 key_setsaval(struct secasvar *sav, struct mbuf *m, 3153 const struct sadb_msghdr *mhp) 3154 { 3155 int error = 0; 3156 3157 KASSERT(!cpu_softintr_p()); 3158 KASSERT(m != NULL); 3159 KASSERT(mhp != NULL); 3160 KASSERT(mhp->msg != NULL); 3161 3162 /* We shouldn't initialize sav variables while someone uses it. */ 3163 KASSERT(sav->refcnt == 0); 3164 3165 /* initialization */ 3166 key_freesaval(sav); 3167 sav->tdb_xform = NULL; /* transform */ 3168 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3169 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3170 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3171 sav->natt_type = 0; 3172 sav->esp_frag = 0; 3173 3174 /* SA */ 3175 if (mhp->ext[SADB_EXT_SA] != NULL) { 3176 const struct sadb_sa *sa0; 3177 3178 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3179 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3180 error = EINVAL; 3181 goto fail; 3182 } 3183 3184 sav->alg_auth = sa0->sadb_sa_auth; 3185 sav->alg_enc = sa0->sadb_sa_encrypt; 3186 sav->flags = sa0->sadb_sa_flags; 3187 3188 /* replay window */ 3189 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3190 size_t len = sizeof(struct secreplay) + 3191 sa0->sadb_sa_replay; 3192 sav->replay = kmem_zalloc(len, KM_SLEEP); 3193 sav->replay_len = len; 3194 if (sa0->sadb_sa_replay != 0) 3195 sav->replay->bitmap = (char*)(sav->replay+1); 3196 sav->replay->wsize = sa0->sadb_sa_replay; 3197 } 3198 } 3199 3200 /* Authentication keys */ 3201 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3202 const struct sadb_key *key0; 3203 int len; 3204 3205 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3206 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3207 3208 error = 0; 3209 if (len < sizeof(*key0)) { 3210 error = EINVAL; 3211 goto fail; 3212 } 3213 switch (mhp->msg->sadb_msg_satype) { 3214 case SADB_SATYPE_AH: 3215 case SADB_SATYPE_ESP: 3216 case SADB_X_SATYPE_TCPSIGNATURE: 3217 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3218 sav->alg_auth != SADB_X_AALG_NULL) 3219 error = EINVAL; 3220 break; 3221 case SADB_X_SATYPE_IPCOMP: 3222 default: 3223 error = EINVAL; 3224 break; 3225 } 3226 if (error) { 3227 IPSECLOG(LOG_DEBUG, "invalid key_auth values.\n"); 3228 goto fail; 3229 } 3230 3231 sav->key_auth = key_newbuf(key0, len); 3232 sav->key_auth_len = len; 3233 } 3234 3235 /* Encryption key */ 3236 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3237 const struct sadb_key *key0; 3238 int len; 3239 3240 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3241 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3242 3243 error = 0; 3244 if (len < sizeof(*key0)) { 3245 error = EINVAL; 3246 goto fail; 3247 } 3248 switch (mhp->msg->sadb_msg_satype) { 3249 case SADB_SATYPE_ESP: 3250 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3251 sav->alg_enc != SADB_EALG_NULL) { 3252 error = EINVAL; 3253 break; 3254 } 3255 sav->key_enc = key_newbuf(key0, len); 3256 sav->key_enc_len = len; 3257 break; 3258 case SADB_X_SATYPE_IPCOMP: 3259 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3260 error = EINVAL; 3261 sav->key_enc = NULL; /*just in case*/ 3262 break; 3263 case SADB_SATYPE_AH: 3264 case SADB_X_SATYPE_TCPSIGNATURE: 3265 default: 3266 error = EINVAL; 3267 break; 3268 } 3269 if (error) { 3270 IPSECLOG(LOG_DEBUG, "invalid key_enc value.\n"); 3271 goto fail; 3272 } 3273 } 3274 3275 /* set iv */ 3276 sav->ivlen = 0; 3277 3278 switch (mhp->msg->sadb_msg_satype) { 3279 case SADB_SATYPE_AH: 3280 error = xform_init(sav, XF_AH); 3281 break; 3282 case SADB_SATYPE_ESP: 3283 error = xform_init(sav, XF_ESP); 3284 break; 3285 case SADB_X_SATYPE_IPCOMP: 3286 error = xform_init(sav, XF_IPCOMP); 3287 break; 3288 case SADB_X_SATYPE_TCPSIGNATURE: 3289 error = xform_init(sav, XF_TCPSIGNATURE); 3290 break; 3291 } 3292 if (error) { 3293 IPSECLOG(LOG_DEBUG, "unable to initialize SA type %u.\n", 3294 mhp->msg->sadb_msg_satype); 3295 goto fail; 3296 } 3297 3298 /* reset created */ 3299 sav->created = time_uptime; 3300 3301 /* make lifetime for CURRENT */ 3302 sav->lft_c = kmem_alloc(sizeof(struct sadb_lifetime), KM_SLEEP); 3303 3304 sav->lft_c->sadb_lifetime_len = 3305 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3306 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3307 sav->lft_c->sadb_lifetime_allocations = 0; 3308 sav->lft_c->sadb_lifetime_bytes = 0; 3309 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3310 sav->lft_c->sadb_lifetime_usetime = 0; 3311 3312 /* lifetimes for HARD and SOFT */ 3313 { 3314 const struct sadb_lifetime *lft0; 3315 3316 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3317 if (lft0 != NULL) { 3318 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3319 error = EINVAL; 3320 goto fail; 3321 } 3322 sav->lft_h = key_newbuf(lft0, sizeof(*lft0)); 3323 } 3324 3325 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3326 if (lft0 != NULL) { 3327 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3328 error = EINVAL; 3329 goto fail; 3330 } 3331 sav->lft_s = key_newbuf(lft0, sizeof(*lft0)); 3332 /* to be initialize ? */ 3333 } 3334 } 3335 3336 return 0; 3337 3338 fail: 3339 key_clear_xform(sav); 3340 key_freesaval(sav); 3341 3342 return error; 3343 } 3344 3345 /* 3346 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3347 * OUT: 0: valid 3348 * other: errno 3349 */ 3350 static int 3351 key_mature(struct secasvar *sav) 3352 { 3353 int error; 3354 3355 /* check SPI value */ 3356 switch (sav->sah->saidx.proto) { 3357 case IPPROTO_ESP: 3358 case IPPROTO_AH: 3359 if (ntohl(sav->spi) <= 255) { 3360 IPSECLOG(LOG_DEBUG, "illegal range of SPI %u.\n", 3361 (u_int32_t)ntohl(sav->spi)); 3362 return EINVAL; 3363 } 3364 break; 3365 } 3366 3367 /* check satype */ 3368 switch (sav->sah->saidx.proto) { 3369 case IPPROTO_ESP: 3370 /* check flags */ 3371 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3372 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3373 IPSECLOG(LOG_DEBUG, 3374 "invalid flag (derived) given to old-esp.\n"); 3375 return EINVAL; 3376 } 3377 error = xform_init(sav, XF_ESP); 3378 break; 3379 case IPPROTO_AH: 3380 /* check flags */ 3381 if (sav->flags & SADB_X_EXT_DERIV) { 3382 IPSECLOG(LOG_DEBUG, 3383 "invalid flag (derived) given to AH SA.\n"); 3384 return EINVAL; 3385 } 3386 if (sav->alg_enc != SADB_EALG_NONE) { 3387 IPSECLOG(LOG_DEBUG, 3388 "protocol and algorithm mismated.\n"); 3389 return(EINVAL); 3390 } 3391 error = xform_init(sav, XF_AH); 3392 break; 3393 case IPPROTO_IPCOMP: 3394 if (sav->alg_auth != SADB_AALG_NONE) { 3395 IPSECLOG(LOG_DEBUG, 3396 "protocol and algorithm mismated.\n"); 3397 return(EINVAL); 3398 } 3399 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3400 && ntohl(sav->spi) >= 0x10000) { 3401 IPSECLOG(LOG_DEBUG, "invalid cpi for IPComp.\n"); 3402 return(EINVAL); 3403 } 3404 error = xform_init(sav, XF_IPCOMP); 3405 break; 3406 case IPPROTO_TCP: 3407 if (sav->alg_enc != SADB_EALG_NONE) { 3408 IPSECLOG(LOG_DEBUG, 3409 "protocol and algorithm mismated.\n"); 3410 return(EINVAL); 3411 } 3412 error = xform_init(sav, XF_TCPSIGNATURE); 3413 break; 3414 default: 3415 IPSECLOG(LOG_DEBUG, "Invalid satype.\n"); 3416 error = EPROTONOSUPPORT; 3417 break; 3418 } 3419 if (error == 0) 3420 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3421 return (error); 3422 } 3423 3424 /* 3425 * subroutine for SADB_GET and SADB_DUMP. 3426 */ 3427 static struct mbuf * 3428 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3429 u_int32_t seq, u_int32_t pid) 3430 { 3431 struct mbuf *result = NULL, *tres = NULL, *m; 3432 int l = 0; 3433 int i; 3434 void *p; 3435 struct sadb_lifetime lt; 3436 int dumporder[] = { 3437 SADB_EXT_SA, SADB_X_EXT_SA2, 3438 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3439 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3440 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3441 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3442 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3443 SADB_X_EXT_NAT_T_TYPE, 3444 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3445 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3446 SADB_X_EXT_NAT_T_FRAG, 3447 3448 }; 3449 3450 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3451 if (m == NULL) 3452 goto fail; 3453 result = m; 3454 3455 for (i = __arraycount(dumporder) - 1; i >= 0; i--) { 3456 m = NULL; 3457 p = NULL; 3458 switch (dumporder[i]) { 3459 case SADB_EXT_SA: 3460 m = key_setsadbsa(sav); 3461 break; 3462 3463 case SADB_X_EXT_SA2: 3464 m = key_setsadbxsa2(sav->sah->saidx.mode, 3465 sav->replay ? sav->replay->count : 0, 3466 sav->sah->saidx.reqid); 3467 break; 3468 3469 case SADB_EXT_ADDRESS_SRC: 3470 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3471 &sav->sah->saidx.src.sa, 3472 FULLMASK, IPSEC_ULPROTO_ANY); 3473 break; 3474 3475 case SADB_EXT_ADDRESS_DST: 3476 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3477 &sav->sah->saidx.dst.sa, 3478 FULLMASK, IPSEC_ULPROTO_ANY); 3479 break; 3480 3481 case SADB_EXT_KEY_AUTH: 3482 if (!sav->key_auth) 3483 continue; 3484 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3485 p = sav->key_auth; 3486 break; 3487 3488 case SADB_EXT_KEY_ENCRYPT: 3489 if (!sav->key_enc) 3490 continue; 3491 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3492 p = sav->key_enc; 3493 break; 3494 3495 case SADB_EXT_LIFETIME_CURRENT: 3496 if (!sav->lft_c) 3497 continue; 3498 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3499 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3500 lt.sadb_lifetime_addtime += time_second - time_uptime; 3501 lt.sadb_lifetime_usetime += time_second - time_uptime; 3502 p = < 3503 break; 3504 3505 case SADB_EXT_LIFETIME_HARD: 3506 if (!sav->lft_h) 3507 continue; 3508 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3509 p = sav->lft_h; 3510 break; 3511 3512 case SADB_EXT_LIFETIME_SOFT: 3513 if (!sav->lft_s) 3514 continue; 3515 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3516 p = sav->lft_s; 3517 break; 3518 3519 case SADB_X_EXT_NAT_T_TYPE: 3520 m = key_setsadbxtype(sav->natt_type); 3521 break; 3522 3523 case SADB_X_EXT_NAT_T_DPORT: 3524 if (sav->natt_type == 0) 3525 continue; 3526 m = key_setsadbxport( 3527 key_portfromsaddr(&sav->sah->saidx.dst), 3528 SADB_X_EXT_NAT_T_DPORT); 3529 break; 3530 3531 case SADB_X_EXT_NAT_T_SPORT: 3532 if (sav->natt_type == 0) 3533 continue; 3534 m = key_setsadbxport( 3535 key_portfromsaddr(&sav->sah->saidx.src), 3536 SADB_X_EXT_NAT_T_SPORT); 3537 break; 3538 3539 case SADB_X_EXT_NAT_T_FRAG: 3540 /* don't send frag info if not set */ 3541 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3542 continue; 3543 m = key_setsadbxfrag(sav->esp_frag); 3544 break; 3545 3546 case SADB_X_EXT_NAT_T_OAI: 3547 case SADB_X_EXT_NAT_T_OAR: 3548 continue; 3549 3550 case SADB_EXT_ADDRESS_PROXY: 3551 case SADB_EXT_IDENTITY_SRC: 3552 case SADB_EXT_IDENTITY_DST: 3553 /* XXX: should we brought from SPD ? */ 3554 case SADB_EXT_SENSITIVITY: 3555 default: 3556 continue; 3557 } 3558 3559 KASSERT(!(m && p)); 3560 if (!m && !p) 3561 goto fail; 3562 if (p && tres) { 3563 M_PREPEND(tres, l, M_DONTWAIT); 3564 if (!tres) 3565 goto fail; 3566 memcpy(mtod(tres, void *), p, l); 3567 continue; 3568 } 3569 if (p) { 3570 m = key_alloc_mbuf(l); 3571 if (!m) 3572 goto fail; 3573 m_copyback(m, 0, l, p); 3574 } 3575 3576 if (tres) 3577 m_cat(m, tres); 3578 tres = m; 3579 } 3580 3581 m_cat(result, tres); 3582 tres = NULL; /* avoid free on error below */ 3583 3584 if (result->m_len < sizeof(struct sadb_msg)) { 3585 result = m_pullup(result, sizeof(struct sadb_msg)); 3586 if (result == NULL) 3587 goto fail; 3588 } 3589 3590 result->m_pkthdr.len = 0; 3591 for (m = result; m; m = m->m_next) 3592 result->m_pkthdr.len += m->m_len; 3593 3594 mtod(result, struct sadb_msg *)->sadb_msg_len = 3595 PFKEY_UNIT64(result->m_pkthdr.len); 3596 3597 return result; 3598 3599 fail: 3600 m_freem(result); 3601 m_freem(tres); 3602 return NULL; 3603 } 3604 3605 3606 /* 3607 * set a type in sadb_x_nat_t_type 3608 */ 3609 static struct mbuf * 3610 key_setsadbxtype(u_int16_t type) 3611 { 3612 struct mbuf *m; 3613 size_t len; 3614 struct sadb_x_nat_t_type *p; 3615 3616 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3617 3618 m = key_alloc_mbuf(len); 3619 if (!m || m->m_next) { /*XXX*/ 3620 if (m) 3621 m_freem(m); 3622 return NULL; 3623 } 3624 3625 p = mtod(m, struct sadb_x_nat_t_type *); 3626 3627 memset(p, 0, len); 3628 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3629 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3630 p->sadb_x_nat_t_type_type = type; 3631 3632 return m; 3633 } 3634 /* 3635 * set a port in sadb_x_nat_t_port. port is in network order 3636 */ 3637 static struct mbuf * 3638 key_setsadbxport(u_int16_t port, u_int16_t type) 3639 { 3640 struct mbuf *m; 3641 size_t len; 3642 struct sadb_x_nat_t_port *p; 3643 3644 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3645 3646 m = key_alloc_mbuf(len); 3647 if (!m || m->m_next) { /*XXX*/ 3648 if (m) 3649 m_freem(m); 3650 return NULL; 3651 } 3652 3653 p = mtod(m, struct sadb_x_nat_t_port *); 3654 3655 memset(p, 0, len); 3656 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3657 p->sadb_x_nat_t_port_exttype = type; 3658 p->sadb_x_nat_t_port_port = port; 3659 3660 return m; 3661 } 3662 3663 /* 3664 * set fragmentation info in sadb_x_nat_t_frag 3665 */ 3666 static struct mbuf * 3667 key_setsadbxfrag(u_int16_t flen) 3668 { 3669 struct mbuf *m; 3670 size_t len; 3671 struct sadb_x_nat_t_frag *p; 3672 3673 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3674 3675 m = key_alloc_mbuf(len); 3676 if (!m || m->m_next) { /*XXX*/ 3677 if (m) 3678 m_freem(m); 3679 return NULL; 3680 } 3681 3682 p = mtod(m, struct sadb_x_nat_t_frag *); 3683 3684 memset(p, 0, len); 3685 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3686 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3687 p->sadb_x_nat_t_frag_fraglen = flen; 3688 3689 return m; 3690 } 3691 3692 /* 3693 * Get port from sockaddr, port is in network order 3694 */ 3695 u_int16_t 3696 key_portfromsaddr(const union sockaddr_union *saddr) 3697 { 3698 u_int16_t port; 3699 3700 switch (saddr->sa.sa_family) { 3701 case AF_INET: { 3702 port = saddr->sin.sin_port; 3703 break; 3704 } 3705 #ifdef INET6 3706 case AF_INET6: { 3707 port = saddr->sin6.sin6_port; 3708 break; 3709 } 3710 #endif 3711 default: 3712 printf("%s: unexpected address family\n", __func__); 3713 port = 0; 3714 break; 3715 } 3716 3717 return port; 3718 } 3719 3720 3721 /* 3722 * Set port is struct sockaddr. port is in network order 3723 */ 3724 static void 3725 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3726 { 3727 switch (saddr->sa.sa_family) { 3728 case AF_INET: { 3729 saddr->sin.sin_port = port; 3730 break; 3731 } 3732 #ifdef INET6 3733 case AF_INET6: { 3734 saddr->sin6.sin6_port = port; 3735 break; 3736 } 3737 #endif 3738 default: 3739 printf("%s: unexpected address family %d\n", __func__, 3740 saddr->sa.sa_family); 3741 break; 3742 } 3743 3744 return; 3745 } 3746 3747 /* 3748 * Safety check sa_len 3749 */ 3750 static int 3751 key_checksalen(const union sockaddr_union *saddr) 3752 { 3753 switch (saddr->sa.sa_family) { 3754 case AF_INET: 3755 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3756 return -1; 3757 break; 3758 #ifdef INET6 3759 case AF_INET6: 3760 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3761 return -1; 3762 break; 3763 #endif 3764 default: 3765 printf("%s: unexpected sa_family %d\n", __func__, 3766 saddr->sa.sa_family); 3767 return -1; 3768 break; 3769 } 3770 return 0; 3771 } 3772 3773 3774 /* 3775 * set data into sadb_msg. 3776 */ 3777 static struct mbuf * 3778 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3779 u_int32_t seq, pid_t pid, u_int16_t reserved) 3780 { 3781 struct mbuf *m; 3782 struct sadb_msg *p; 3783 int len; 3784 3785 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 3786 3787 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3788 3789 MGETHDR(m, M_DONTWAIT, MT_DATA); 3790 if (m && len > MHLEN) { 3791 MCLGET(m, M_DONTWAIT); 3792 if ((m->m_flags & M_EXT) == 0) { 3793 m_freem(m); 3794 m = NULL; 3795 } 3796 } 3797 if (!m) 3798 return NULL; 3799 m->m_pkthdr.len = m->m_len = len; 3800 m->m_next = NULL; 3801 3802 p = mtod(m, struct sadb_msg *); 3803 3804 memset(p, 0, len); 3805 p->sadb_msg_version = PF_KEY_V2; 3806 p->sadb_msg_type = type; 3807 p->sadb_msg_errno = 0; 3808 p->sadb_msg_satype = satype; 3809 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3810 p->sadb_msg_reserved = reserved; 3811 p->sadb_msg_seq = seq; 3812 p->sadb_msg_pid = (u_int32_t)pid; 3813 3814 return m; 3815 } 3816 3817 /* 3818 * copy secasvar data into sadb_address. 3819 */ 3820 static struct mbuf * 3821 key_setsadbsa(struct secasvar *sav) 3822 { 3823 struct mbuf *m; 3824 struct sadb_sa *p; 3825 int len; 3826 3827 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3828 m = key_alloc_mbuf(len); 3829 if (!m || m->m_next) { /*XXX*/ 3830 if (m) 3831 m_freem(m); 3832 return NULL; 3833 } 3834 3835 p = mtod(m, struct sadb_sa *); 3836 3837 memset(p, 0, len); 3838 p->sadb_sa_len = PFKEY_UNIT64(len); 3839 p->sadb_sa_exttype = SADB_EXT_SA; 3840 p->sadb_sa_spi = sav->spi; 3841 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3842 p->sadb_sa_state = sav->state; 3843 p->sadb_sa_auth = sav->alg_auth; 3844 p->sadb_sa_encrypt = sav->alg_enc; 3845 p->sadb_sa_flags = sav->flags; 3846 3847 return m; 3848 } 3849 3850 /* 3851 * set data into sadb_address. 3852 */ 3853 static struct mbuf * 3854 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3855 u_int8_t prefixlen, u_int16_t ul_proto) 3856 { 3857 struct mbuf *m; 3858 struct sadb_address *p; 3859 size_t len; 3860 3861 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3862 PFKEY_ALIGN8(saddr->sa_len); 3863 m = key_alloc_mbuf(len); 3864 if (!m || m->m_next) { /*XXX*/ 3865 if (m) 3866 m_freem(m); 3867 return NULL; 3868 } 3869 3870 p = mtod(m, struct sadb_address *); 3871 3872 memset(p, 0, len); 3873 p->sadb_address_len = PFKEY_UNIT64(len); 3874 p->sadb_address_exttype = exttype; 3875 p->sadb_address_proto = ul_proto; 3876 if (prefixlen == FULLMASK) { 3877 switch (saddr->sa_family) { 3878 case AF_INET: 3879 prefixlen = sizeof(struct in_addr) << 3; 3880 break; 3881 case AF_INET6: 3882 prefixlen = sizeof(struct in6_addr) << 3; 3883 break; 3884 default: 3885 ; /*XXX*/ 3886 } 3887 } 3888 p->sadb_address_prefixlen = prefixlen; 3889 p->sadb_address_reserved = 0; 3890 3891 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3892 saddr, saddr->sa_len); 3893 3894 return m; 3895 } 3896 3897 #if 0 3898 /* 3899 * set data into sadb_ident. 3900 */ 3901 static struct mbuf * 3902 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3903 void *string, int stringlen, u_int64_t id) 3904 { 3905 struct mbuf *m; 3906 struct sadb_ident *p; 3907 size_t len; 3908 3909 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3910 m = key_alloc_mbuf(len); 3911 if (!m || m->m_next) { /*XXX*/ 3912 if (m) 3913 m_freem(m); 3914 return NULL; 3915 } 3916 3917 p = mtod(m, struct sadb_ident *); 3918 3919 memset(p, 0, len); 3920 p->sadb_ident_len = PFKEY_UNIT64(len); 3921 p->sadb_ident_exttype = exttype; 3922 p->sadb_ident_type = idtype; 3923 p->sadb_ident_reserved = 0; 3924 p->sadb_ident_id = id; 3925 3926 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3927 string, stringlen); 3928 3929 return m; 3930 } 3931 #endif 3932 3933 /* 3934 * set data into sadb_x_sa2. 3935 */ 3936 static struct mbuf * 3937 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 3938 { 3939 struct mbuf *m; 3940 struct sadb_x_sa2 *p; 3941 size_t len; 3942 3943 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3944 m = key_alloc_mbuf(len); 3945 if (!m || m->m_next) { /*XXX*/ 3946 if (m) 3947 m_freem(m); 3948 return NULL; 3949 } 3950 3951 p = mtod(m, struct sadb_x_sa2 *); 3952 3953 memset(p, 0, len); 3954 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3955 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3956 p->sadb_x_sa2_mode = mode; 3957 p->sadb_x_sa2_reserved1 = 0; 3958 p->sadb_x_sa2_reserved2 = 0; 3959 p->sadb_x_sa2_sequence = seq; 3960 p->sadb_x_sa2_reqid = reqid; 3961 3962 return m; 3963 } 3964 3965 /* 3966 * set data into sadb_x_policy 3967 */ 3968 static struct mbuf * 3969 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3970 { 3971 struct mbuf *m; 3972 struct sadb_x_policy *p; 3973 size_t len; 3974 3975 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3976 m = key_alloc_mbuf(len); 3977 if (!m || m->m_next) { /*XXX*/ 3978 if (m) 3979 m_freem(m); 3980 return NULL; 3981 } 3982 3983 p = mtod(m, struct sadb_x_policy *); 3984 3985 memset(p, 0, len); 3986 p->sadb_x_policy_len = PFKEY_UNIT64(len); 3987 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3988 p->sadb_x_policy_type = type; 3989 p->sadb_x_policy_dir = dir; 3990 p->sadb_x_policy_id = id; 3991 3992 return m; 3993 } 3994 3995 /* %%% utilities */ 3996 /* 3997 * copy a buffer into the new buffer allocated. 3998 */ 3999 static void * 4000 key_newbuf(const void *src, u_int len) 4001 { 4002 void *new; 4003 4004 new = kmem_alloc(len, KM_SLEEP); 4005 memcpy(new, src, len); 4006 4007 return new; 4008 } 4009 4010 /* compare my own address 4011 * OUT: 1: true, i.e. my address. 4012 * 0: false 4013 */ 4014 int 4015 key_ismyaddr(const struct sockaddr *sa) 4016 { 4017 #ifdef INET 4018 const struct sockaddr_in *sin; 4019 const struct in_ifaddr *ia; 4020 int s; 4021 #endif 4022 4023 KASSERT(sa != NULL); 4024 4025 switch (sa->sa_family) { 4026 #ifdef INET 4027 case AF_INET: 4028 sin = (const struct sockaddr_in *)sa; 4029 s = pserialize_read_enter(); 4030 IN_ADDRLIST_READER_FOREACH(ia) { 4031 if (sin->sin_family == ia->ia_addr.sin_family && 4032 sin->sin_len == ia->ia_addr.sin_len && 4033 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4034 { 4035 pserialize_read_exit(s); 4036 return 1; 4037 } 4038 } 4039 pserialize_read_exit(s); 4040 break; 4041 #endif 4042 #ifdef INET6 4043 case AF_INET6: 4044 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4045 #endif 4046 } 4047 4048 return 0; 4049 } 4050 4051 #ifdef INET6 4052 /* 4053 * compare my own address for IPv6. 4054 * 1: ours 4055 * 0: other 4056 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4057 */ 4058 #include <netinet6/in6_var.h> 4059 4060 static int 4061 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4062 { 4063 struct in6_ifaddr *ia; 4064 int s; 4065 struct psref psref; 4066 int bound; 4067 int ours = 1; 4068 4069 bound = curlwp_bind(); 4070 s = pserialize_read_enter(); 4071 IN6_ADDRLIST_READER_FOREACH(ia) { 4072 bool ingroup; 4073 4074 if (key_sockaddr_match((const struct sockaddr *)&sin6, 4075 (const struct sockaddr *)&ia->ia_addr, 0)) { 4076 pserialize_read_exit(s); 4077 goto ours; 4078 } 4079 ia6_acquire(ia, &psref); 4080 pserialize_read_exit(s); 4081 4082 /* 4083 * XXX Multicast 4084 * XXX why do we care about multlicast here while we don't care 4085 * about IPv4 multicast?? 4086 * XXX scope 4087 */ 4088 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4089 if (ingroup) { 4090 ia6_release(ia, &psref); 4091 goto ours; 4092 } 4093 4094 s = pserialize_read_enter(); 4095 ia6_release(ia, &psref); 4096 } 4097 pserialize_read_exit(s); 4098 4099 /* loopback, just for safety */ 4100 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4101 goto ours; 4102 4103 ours = 0; 4104 ours: 4105 curlwp_bindx(bound); 4106 4107 return ours; 4108 } 4109 #endif /*INET6*/ 4110 4111 /* 4112 * compare two secasindex structure. 4113 * flag can specify to compare 2 saidxes. 4114 * compare two secasindex structure without both mode and reqid. 4115 * don't compare port. 4116 * IN: 4117 * saidx0: source, it can be in SAD. 4118 * saidx1: object. 4119 * OUT: 4120 * 1 : equal 4121 * 0 : not equal 4122 */ 4123 static int 4124 key_saidx_match( 4125 const struct secasindex *saidx0, 4126 const struct secasindex *saidx1, 4127 int flag) 4128 { 4129 int chkport; 4130 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4131 4132 KASSERT(saidx0 != NULL); 4133 KASSERT(saidx1 != NULL); 4134 4135 /* sanity */ 4136 if (saidx0->proto != saidx1->proto) 4137 return 0; 4138 4139 if (flag == CMP_EXACTLY) { 4140 if (saidx0->mode != saidx1->mode) 4141 return 0; 4142 if (saidx0->reqid != saidx1->reqid) 4143 return 0; 4144 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4145 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4146 return 0; 4147 } else { 4148 4149 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4150 if (flag == CMP_MODE_REQID ||flag == CMP_REQID) { 4151 /* 4152 * If reqid of SPD is non-zero, unique SA is required. 4153 * The result must be of same reqid in this case. 4154 */ 4155 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4156 return 0; 4157 } 4158 4159 if (flag == CMP_MODE_REQID) { 4160 if (saidx0->mode != IPSEC_MODE_ANY && 4161 saidx0->mode != saidx1->mode) 4162 return 0; 4163 } 4164 4165 4166 sa0src = &saidx0->src.sa; 4167 sa0dst = &saidx0->dst.sa; 4168 sa1src = &saidx1->src.sa; 4169 sa1dst = &saidx1->dst.sa; 4170 /* 4171 * If NAT-T is enabled, check ports for tunnel mode. 4172 * Don't do it for transport mode, as there is no 4173 * port information available in the SP. 4174 * Also don't check ports if they are set to zero 4175 * in the SPD: This means we have a non-generated 4176 * SPD which can't know UDP ports. 4177 */ 4178 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4179 chkport = PORT_LOOSE; 4180 else 4181 chkport = PORT_NONE; 4182 4183 if (!key_sockaddr_match(sa0src, sa1src, chkport)) { 4184 return 0; 4185 } 4186 if (!key_sockaddr_match(sa0dst, sa1dst, chkport)) { 4187 return 0; 4188 } 4189 } 4190 4191 return 1; 4192 } 4193 4194 /* 4195 * compare two secindex structure exactly. 4196 * IN: 4197 * spidx0: source, it is often in SPD. 4198 * spidx1: object, it is often from PFKEY message. 4199 * OUT: 4200 * 1 : equal 4201 * 0 : not equal 4202 */ 4203 static int 4204 key_spidx_match_exactly( 4205 const struct secpolicyindex *spidx0, 4206 const struct secpolicyindex *spidx1) 4207 { 4208 4209 KASSERT(spidx0 != NULL); 4210 KASSERT(spidx1 != NULL); 4211 4212 /* sanity */ 4213 if (spidx0->prefs != spidx1->prefs || 4214 spidx0->prefd != spidx1->prefd || 4215 spidx0->ul_proto != spidx1->ul_proto) 4216 return 0; 4217 4218 return key_sockaddr_match(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) && 4219 key_sockaddr_match(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT); 4220 } 4221 4222 /* 4223 * compare two secindex structure with mask. 4224 * IN: 4225 * spidx0: source, it is often in SPD. 4226 * spidx1: object, it is often from IP header. 4227 * OUT: 4228 * 1 : equal 4229 * 0 : not equal 4230 */ 4231 static int 4232 key_spidx_match_withmask( 4233 const struct secpolicyindex *spidx0, 4234 const struct secpolicyindex *spidx1) 4235 { 4236 4237 KASSERT(spidx0 != NULL); 4238 KASSERT(spidx1 != NULL); 4239 4240 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4241 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4242 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4243 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4244 return 0; 4245 4246 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4247 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY && 4248 spidx0->ul_proto != spidx1->ul_proto) 4249 return 0; 4250 4251 switch (spidx0->src.sa.sa_family) { 4252 case AF_INET: 4253 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY && 4254 spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4255 return 0; 4256 if (!key_bb_match_withmask(&spidx0->src.sin.sin_addr, 4257 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4258 return 0; 4259 break; 4260 case AF_INET6: 4261 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY && 4262 spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4263 return 0; 4264 /* 4265 * scope_id check. if sin6_scope_id is 0, we regard it 4266 * as a wildcard scope, which matches any scope zone ID. 4267 */ 4268 if (spidx0->src.sin6.sin6_scope_id && 4269 spidx1->src.sin6.sin6_scope_id && 4270 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4271 return 0; 4272 if (!key_bb_match_withmask(&spidx0->src.sin6.sin6_addr, 4273 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4274 return 0; 4275 break; 4276 default: 4277 /* XXX */ 4278 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4279 return 0; 4280 break; 4281 } 4282 4283 switch (spidx0->dst.sa.sa_family) { 4284 case AF_INET: 4285 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY && 4286 spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4287 return 0; 4288 if (!key_bb_match_withmask(&spidx0->dst.sin.sin_addr, 4289 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4290 return 0; 4291 break; 4292 case AF_INET6: 4293 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY && 4294 spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4295 return 0; 4296 /* 4297 * scope_id check. if sin6_scope_id is 0, we regard it 4298 * as a wildcard scope, which matches any scope zone ID. 4299 */ 4300 if (spidx0->src.sin6.sin6_scope_id && 4301 spidx1->src.sin6.sin6_scope_id && 4302 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4303 return 0; 4304 if (!key_bb_match_withmask(&spidx0->dst.sin6.sin6_addr, 4305 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4306 return 0; 4307 break; 4308 default: 4309 /* XXX */ 4310 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4311 return 0; 4312 break; 4313 } 4314 4315 /* XXX Do we check other field ? e.g. flowinfo */ 4316 4317 return 1; 4318 } 4319 4320 /* returns 0 on match */ 4321 static int 4322 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4323 { 4324 switch (howport) { 4325 case PORT_NONE: 4326 return 0; 4327 case PORT_LOOSE: 4328 if (port1 == 0 || port2 == 0) 4329 return 0; 4330 /*FALLTHROUGH*/ 4331 case PORT_STRICT: 4332 if (port1 != port2) { 4333 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4334 "port fail %d != %d\n", port1, port2); 4335 return 1; 4336 } 4337 return 0; 4338 default: 4339 KASSERT(0); 4340 return 1; 4341 } 4342 } 4343 4344 /* returns 1 on match */ 4345 static int 4346 key_sockaddr_match( 4347 const struct sockaddr *sa1, 4348 const struct sockaddr *sa2, 4349 int howport) 4350 { 4351 const struct sockaddr_in *sin1, *sin2; 4352 const struct sockaddr_in6 *sin61, *sin62; 4353 4354 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4355 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4356 "fam/len fail %d != %d || %d != %d\n", 4357 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4358 sa2->sa_len); 4359 return 0; 4360 } 4361 4362 switch (sa1->sa_family) { 4363 case AF_INET: 4364 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4365 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4366 "len fail %d != %zu\n", 4367 sa1->sa_len, sizeof(struct sockaddr_in)); 4368 return 0; 4369 } 4370 sin1 = (const struct sockaddr_in *)sa1; 4371 sin2 = (const struct sockaddr_in *)sa2; 4372 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4373 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4374 "addr fail %#x != %#x\n", 4375 sin1->sin_addr.s_addr, sin2->sin_addr.s_addr); 4376 return 0; 4377 } 4378 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4379 return 0; 4380 } 4381 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4382 "addr success %#x[%d] == %#x[%d]\n", 4383 sin1->sin_addr.s_addr, sin1->sin_port, 4384 sin2->sin_addr.s_addr, sin2->sin_port); 4385 break; 4386 case AF_INET6: 4387 sin61 = (const struct sockaddr_in6 *)sa1; 4388 sin62 = (const struct sockaddr_in6 *)sa2; 4389 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4390 return 0; /*EINVAL*/ 4391 4392 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4393 return 0; 4394 } 4395 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4396 return 0; 4397 } 4398 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4399 return 0; 4400 } 4401 break; 4402 default: 4403 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4404 return 0; 4405 break; 4406 } 4407 4408 return 1; 4409 } 4410 4411 /* 4412 * compare two buffers with mask. 4413 * IN: 4414 * addr1: source 4415 * addr2: object 4416 * bits: Number of bits to compare 4417 * OUT: 4418 * 1 : equal 4419 * 0 : not equal 4420 */ 4421 static int 4422 key_bb_match_withmask(const void *a1, const void *a2, u_int bits) 4423 { 4424 const unsigned char *p1 = a1; 4425 const unsigned char *p2 = a2; 4426 4427 /* XXX: This could be considerably faster if we compare a word 4428 * at a time, but it is complicated on LSB Endian machines */ 4429 4430 /* Handle null pointers */ 4431 if (p1 == NULL || p2 == NULL) 4432 return (p1 == p2); 4433 4434 while (bits >= 8) { 4435 if (*p1++ != *p2++) 4436 return 0; 4437 bits -= 8; 4438 } 4439 4440 if (bits > 0) { 4441 u_int8_t mask = ~((1<<(8-bits))-1); 4442 if ((*p1 & mask) != (*p2 & mask)) 4443 return 0; 4444 } 4445 return 1; /* Match! */ 4446 } 4447 4448 static void 4449 key_timehandler_spd(time_t now) 4450 { 4451 u_int dir; 4452 struct secpolicy *sp, *nextsp; 4453 4454 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4455 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 4456 if (sp->state == IPSEC_SPSTATE_DEAD) { 4457 key_sp_unlink(sp); /*XXX*/ 4458 4459 /* 'sp' dead; continue transfers to 4460 * 'sp = nextsp' 4461 */ 4462 continue; 4463 } 4464 4465 if (sp->lifetime == 0 && sp->validtime == 0) 4466 continue; 4467 4468 /* the deletion will occur next time */ 4469 if ((sp->lifetime && now - sp->created > sp->lifetime) || 4470 (sp->validtime && now - sp->lastused > sp->validtime)) { 4471 key_sp_dead(sp); 4472 key_spdexpire(sp); 4473 continue; 4474 } 4475 } 4476 } 4477 } 4478 4479 static void 4480 key_timehandler_sad(time_t now) 4481 { 4482 struct secashead *sah, *nextsah; 4483 struct secasvar *sav, *nextsav; 4484 4485 LIST_FOREACH_SAFE(sah, &sahtree, chain, nextsah) { 4486 /* if sah has been dead, then delete it and process next sah. */ 4487 if (sah->state == SADB_SASTATE_DEAD) { 4488 key_delsah(sah); 4489 continue; 4490 } 4491 4492 /* if LARVAL entry doesn't become MATURE, delete it. */ 4493 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], 4494 chain, nextsav) { 4495 if (now - sav->created > key_larval_lifetime) { 4496 KEY_FREESAV(&sav); 4497 } 4498 } 4499 4500 /* 4501 * check MATURE entry to start to send expire message 4502 * whether or not. 4503 */ 4504 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], 4505 chain, nextsav) { 4506 /* we don't need to check. */ 4507 if (sav->lft_s == NULL) 4508 continue; 4509 4510 /* sanity check */ 4511 if (sav->lft_c == NULL) { 4512 IPSECLOG(LOG_DEBUG, 4513 "There is no CURRENT time, why?\n"); 4514 continue; 4515 } 4516 4517 /* check SOFT lifetime */ 4518 if (sav->lft_s->sadb_lifetime_addtime != 0 && 4519 now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4520 /* 4521 * check SA to be used whether or not. 4522 * when SA hasn't been used, delete it. 4523 */ 4524 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4525 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4526 KEY_FREESAV(&sav); 4527 } else { 4528 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4529 /* 4530 * XXX If we keep to send expire 4531 * message in the status of 4532 * DYING. Do remove below code. 4533 */ 4534 key_expire(sav); 4535 } 4536 } 4537 /* check SOFT lifetime by bytes */ 4538 /* 4539 * XXX I don't know the way to delete this SA 4540 * when new SA is installed. Caution when it's 4541 * installed too big lifetime by time. 4542 */ 4543 else if (sav->lft_s->sadb_lifetime_bytes != 0 && 4544 sav->lft_s->sadb_lifetime_bytes < 4545 sav->lft_c->sadb_lifetime_bytes) { 4546 4547 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4548 /* 4549 * XXX If we keep to send expire 4550 * message in the status of 4551 * DYING. Do remove below code. 4552 */ 4553 key_expire(sav); 4554 } 4555 } 4556 4557 /* check DYING entry to change status to DEAD. */ 4558 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], 4559 chain, nextsav) { 4560 /* we don't need to check. */ 4561 if (sav->lft_h == NULL) 4562 continue; 4563 4564 /* sanity check */ 4565 if (sav->lft_c == NULL) { 4566 IPSECLOG(LOG_DEBUG, 4567 "There is no CURRENT time, why?\n"); 4568 continue; 4569 } 4570 4571 if (sav->lft_h->sadb_lifetime_addtime != 0 && 4572 now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4573 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4574 KEY_FREESAV(&sav); 4575 } 4576 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4577 else if (sav->lft_s != NULL 4578 && sav->lft_s->sadb_lifetime_addtime != 0 4579 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4580 /* 4581 * XXX: should be checked to be 4582 * installed the valid SA. 4583 */ 4584 4585 /* 4586 * If there is no SA then sending 4587 * expire message. 4588 */ 4589 key_expire(sav); 4590 } 4591 #endif 4592 /* check HARD lifetime by bytes */ 4593 else if (sav->lft_h->sadb_lifetime_bytes != 0 && 4594 sav->lft_h->sadb_lifetime_bytes < 4595 sav->lft_c->sadb_lifetime_bytes) { 4596 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4597 KEY_FREESAV(&sav); 4598 } 4599 } 4600 4601 /* delete entry in DEAD */ 4602 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], 4603 chain, nextsav) { 4604 /* sanity check */ 4605 if (sav->state != SADB_SASTATE_DEAD) { 4606 IPSECLOG(LOG_DEBUG, 4607 "invalid sav->state (queue: %d SA: %d): " 4608 "kill it anyway\n", 4609 SADB_SASTATE_DEAD, sav->state); 4610 } 4611 4612 /* 4613 * do not call key_freesav() here. 4614 * sav should already be freed, and sav->refcnt 4615 * shows other references to sav 4616 * (such as from SPD). 4617 */ 4618 } 4619 } 4620 } 4621 4622 static void 4623 key_timehandler_acq(time_t now) 4624 { 4625 #ifndef IPSEC_NONBLOCK_ACQUIRE 4626 struct secacq *acq, *nextacq; 4627 4628 restart: 4629 mutex_enter(&key_mtx); 4630 LIST_FOREACH_SAFE(acq, &acqtree, chain, nextacq) { 4631 if (now - acq->created > key_blockacq_lifetime) { 4632 LIST_REMOVE(acq, chain); 4633 mutex_exit(&key_mtx); 4634 kmem_free(acq, sizeof(*acq)); 4635 goto restart; 4636 } 4637 } 4638 mutex_exit(&key_mtx); 4639 #endif 4640 } 4641 4642 static void 4643 key_timehandler_spacq(time_t now) 4644 { 4645 #ifdef notyet 4646 struct secspacq *acq, *nextacq; 4647 4648 LIST_FOREACH_SAFE(acq, &spacqtree, chain, nextacq) { 4649 if (now - acq->created > key_blockacq_lifetime) { 4650 KASSERT(__LIST_CHAINED(acq)); 4651 LIST_REMOVE(acq, chain); 4652 kmem_free(acq, sizeof(*acq)); 4653 } 4654 } 4655 #endif 4656 } 4657 4658 /* 4659 * time handler. 4660 * scanning SPD and SAD to check status for each entries, 4661 * and do to remove or to expire. 4662 */ 4663 static void 4664 key_timehandler_work(struct work *wk, void *arg) 4665 { 4666 int s; 4667 time_t now = time_uptime; 4668 4669 s = splsoftnet(); 4670 mutex_enter(softnet_lock); 4671 4672 key_timehandler_spd(now); 4673 key_timehandler_sad(now); 4674 key_timehandler_acq(now); 4675 key_timehandler_spacq(now); 4676 4677 /* do exchange to tick time !! */ 4678 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4679 4680 mutex_exit(softnet_lock); 4681 splx(s); 4682 return; 4683 } 4684 4685 static void 4686 key_timehandler(void *arg) 4687 { 4688 4689 workqueue_enqueue(key_timehandler_wq, &key_timehandler_wk, NULL); 4690 } 4691 4692 u_long 4693 key_random(void) 4694 { 4695 u_long value; 4696 4697 key_randomfill(&value, sizeof(value)); 4698 return value; 4699 } 4700 4701 void 4702 key_randomfill(void *p, size_t l) 4703 { 4704 4705 cprng_fast(p, l); 4706 } 4707 4708 /* 4709 * map SADB_SATYPE_* to IPPROTO_*. 4710 * if satype == SADB_SATYPE then satype is mapped to ~0. 4711 * OUT: 4712 * 0: invalid satype. 4713 */ 4714 static u_int16_t 4715 key_satype2proto(u_int8_t satype) 4716 { 4717 switch (satype) { 4718 case SADB_SATYPE_UNSPEC: 4719 return IPSEC_PROTO_ANY; 4720 case SADB_SATYPE_AH: 4721 return IPPROTO_AH; 4722 case SADB_SATYPE_ESP: 4723 return IPPROTO_ESP; 4724 case SADB_X_SATYPE_IPCOMP: 4725 return IPPROTO_IPCOMP; 4726 case SADB_X_SATYPE_TCPSIGNATURE: 4727 return IPPROTO_TCP; 4728 default: 4729 return 0; 4730 } 4731 /* NOTREACHED */ 4732 } 4733 4734 /* 4735 * map IPPROTO_* to SADB_SATYPE_* 4736 * OUT: 4737 * 0: invalid protocol type. 4738 */ 4739 static u_int8_t 4740 key_proto2satype(u_int16_t proto) 4741 { 4742 switch (proto) { 4743 case IPPROTO_AH: 4744 return SADB_SATYPE_AH; 4745 case IPPROTO_ESP: 4746 return SADB_SATYPE_ESP; 4747 case IPPROTO_IPCOMP: 4748 return SADB_X_SATYPE_IPCOMP; 4749 case IPPROTO_TCP: 4750 return SADB_X_SATYPE_TCPSIGNATURE; 4751 default: 4752 return 0; 4753 } 4754 /* NOTREACHED */ 4755 } 4756 4757 static int 4758 key_setsecasidx(int proto, int mode, int reqid, 4759 const struct sockaddr *src, const struct sockaddr *dst, 4760 struct secasindex * saidx) 4761 { 4762 const union sockaddr_union *src_u = (const union sockaddr_union *)src; 4763 const union sockaddr_union *dst_u = (const union sockaddr_union *)dst; 4764 4765 /* sa len safety check */ 4766 if (key_checksalen(src_u) != 0) 4767 return -1; 4768 if (key_checksalen(dst_u) != 0) 4769 return -1; 4770 4771 memset(saidx, 0, sizeof(*saidx)); 4772 saidx->proto = proto; 4773 saidx->mode = mode; 4774 saidx->reqid = reqid; 4775 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4776 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4777 4778 key_porttosaddr(&((saidx)->src), 0); 4779 key_porttosaddr(&((saidx)->dst), 0); 4780 return 0; 4781 } 4782 4783 static void 4784 key_init_spidx_bymsghdr(struct secpolicyindex *spidx, 4785 const struct sadb_msghdr *mhp) 4786 { 4787 const struct sadb_address *src0, *dst0; 4788 const struct sockaddr *src, *dst; 4789 const struct sadb_x_policy *xpl0; 4790 4791 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 4792 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 4793 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4794 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4795 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 4796 4797 memset(spidx, 0, sizeof(*spidx)); 4798 spidx->dir = xpl0->sadb_x_policy_dir; 4799 spidx->prefs = src0->sadb_address_prefixlen; 4800 spidx->prefd = dst0->sadb_address_prefixlen; 4801 spidx->ul_proto = src0->sadb_address_proto; 4802 /* XXX boundary check against sa_len */ 4803 memcpy(&spidx->src, src, src->sa_len); 4804 memcpy(&spidx->dst, dst, dst->sa_len); 4805 } 4806 4807 /* %%% PF_KEY */ 4808 /* 4809 * SADB_GETSPI processing is to receive 4810 * <base, (SA2), src address, dst address, (SPI range)> 4811 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4812 * tree with the status of LARVAL, and send 4813 * <base, SA(*), address(SD)> 4814 * to the IKMPd. 4815 * 4816 * IN: mhp: pointer to the pointer to each header. 4817 * OUT: NULL if fail. 4818 * other if success, return pointer to the message to send. 4819 */ 4820 static int 4821 key_api_getspi(struct socket *so, struct mbuf *m, 4822 const struct sadb_msghdr *mhp) 4823 { 4824 const struct sockaddr *src, *dst; 4825 struct secasindex saidx; 4826 struct secashead *newsah; 4827 struct secasvar *newsav; 4828 u_int8_t proto; 4829 u_int32_t spi; 4830 u_int8_t mode; 4831 u_int16_t reqid; 4832 int error; 4833 4834 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4835 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4836 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4837 return key_senderror(so, m, EINVAL); 4838 } 4839 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4840 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4841 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4842 return key_senderror(so, m, EINVAL); 4843 } 4844 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4845 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4846 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4847 } else { 4848 mode = IPSEC_MODE_ANY; 4849 reqid = 0; 4850 } 4851 4852 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4853 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4854 4855 /* map satype to proto */ 4856 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 4857 if (proto == 0) { 4858 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 4859 return key_senderror(so, m, EINVAL); 4860 } 4861 4862 4863 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 4864 if (error != 0) 4865 return key_senderror(so, m, EINVAL); 4866 4867 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 4868 if (error != 0) 4869 return key_senderror(so, m, EINVAL); 4870 4871 /* SPI allocation */ 4872 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4873 &saidx); 4874 if (spi == 0) 4875 return key_senderror(so, m, EINVAL); 4876 4877 /* get a SA index */ 4878 newsah = key_getsah(&saidx, CMP_REQID); 4879 if (newsah == NULL) { 4880 /* create a new SA index */ 4881 newsah = key_newsah(&saidx); 4882 if (newsah == NULL) { 4883 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 4884 return key_senderror(so, m, ENOBUFS); 4885 } 4886 } 4887 4888 /* get a new SA */ 4889 /* XXX rewrite */ 4890 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4891 if (newsav == NULL) { 4892 /* XXX don't free new SA index allocated in above. */ 4893 return key_senderror(so, m, error); 4894 } 4895 4896 /* set spi */ 4897 newsav->spi = htonl(spi); 4898 4899 #ifndef IPSEC_NONBLOCK_ACQUIRE 4900 /* delete the entry in acqtree */ 4901 if (mhp->msg->sadb_msg_seq != 0) { 4902 struct secacq *acq; 4903 mutex_enter(&key_mtx); 4904 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 4905 if (acq != NULL) { 4906 /* reset counter in order to deletion by timehandler. */ 4907 acq->created = time_uptime; 4908 acq->count = 0; 4909 } 4910 mutex_exit(&key_mtx); 4911 } 4912 #endif 4913 4914 { 4915 struct mbuf *n, *nn; 4916 struct sadb_sa *m_sa; 4917 int off, len; 4918 4919 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4920 PFKEY_ALIGN8(sizeof(struct sadb_sa)) <= MCLBYTES); 4921 4922 /* create new sadb_msg to reply. */ 4923 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4924 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4925 4926 MGETHDR(n, M_DONTWAIT, MT_DATA); 4927 if (len > MHLEN) { 4928 MCLGET(n, M_DONTWAIT); 4929 if ((n->m_flags & M_EXT) == 0) { 4930 m_freem(n); 4931 n = NULL; 4932 } 4933 } 4934 if (!n) 4935 return key_senderror(so, m, ENOBUFS); 4936 4937 n->m_len = len; 4938 n->m_next = NULL; 4939 off = 0; 4940 4941 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4942 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4943 4944 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4945 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4946 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4947 m_sa->sadb_sa_spi = htonl(spi); 4948 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4949 4950 KASSERTMSG(off == len, "length inconsistency"); 4951 4952 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4953 SADB_EXT_ADDRESS_DST); 4954 if (!n->m_next) { 4955 m_freem(n); 4956 return key_senderror(so, m, ENOBUFS); 4957 } 4958 4959 if (n->m_len < sizeof(struct sadb_msg)) { 4960 n = m_pullup(n, sizeof(struct sadb_msg)); 4961 if (n == NULL) 4962 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4963 } 4964 4965 n->m_pkthdr.len = 0; 4966 for (nn = n; nn; nn = nn->m_next) 4967 n->m_pkthdr.len += nn->m_len; 4968 4969 key_fill_replymsg(n, newsav->seq); 4970 4971 m_freem(m); 4972 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4973 } 4974 } 4975 4976 /* 4977 * allocating new SPI 4978 * called by key_api_getspi(). 4979 * OUT: 4980 * 0: failure. 4981 * others: success. 4982 */ 4983 static u_int32_t 4984 key_do_getnewspi(const struct sadb_spirange *spirange, 4985 const struct secasindex *saidx) 4986 { 4987 u_int32_t newspi; 4988 u_int32_t spmin, spmax; 4989 int count = key_spi_trycnt; 4990 4991 /* set spi range to allocate */ 4992 if (spirange != NULL) { 4993 spmin = spirange->sadb_spirange_min; 4994 spmax = spirange->sadb_spirange_max; 4995 } else { 4996 spmin = key_spi_minval; 4997 spmax = key_spi_maxval; 4998 } 4999 /* IPCOMP needs 2-byte SPI */ 5000 if (saidx->proto == IPPROTO_IPCOMP) { 5001 u_int32_t t; 5002 if (spmin >= 0x10000) 5003 spmin = 0xffff; 5004 if (spmax >= 0x10000) 5005 spmax = 0xffff; 5006 if (spmin > spmax) { 5007 t = spmin; spmin = spmax; spmax = t; 5008 } 5009 } 5010 5011 if (spmin == spmax) { 5012 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5013 IPSECLOG(LOG_DEBUG, "SPI %u exists already.\n", spmin); 5014 return 0; 5015 } 5016 5017 count--; /* taking one cost. */ 5018 newspi = spmin; 5019 5020 } else { 5021 5022 /* init SPI */ 5023 newspi = 0; 5024 5025 /* when requesting to allocate spi ranged */ 5026 while (count--) { 5027 /* generate pseudo-random SPI value ranged. */ 5028 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5029 5030 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5031 break; 5032 } 5033 5034 if (count == 0 || newspi == 0) { 5035 IPSECLOG(LOG_DEBUG, "to allocate spi is failed.\n"); 5036 return 0; 5037 } 5038 } 5039 5040 /* statistics */ 5041 keystat.getspi_count = 5042 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5043 5044 return newspi; 5045 } 5046 5047 static int 5048 key_handle_natt_info(struct secasvar *sav, 5049 const struct sadb_msghdr *mhp) 5050 { 5051 const char *msg = "?" ; 5052 struct sadb_x_nat_t_type *type; 5053 struct sadb_x_nat_t_port *sport, *dport; 5054 struct sadb_address *iaddr, *raddr; 5055 struct sadb_x_nat_t_frag *frag; 5056 5057 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5058 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5059 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5060 return 0; 5061 5062 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5063 msg = "TYPE"; 5064 goto bad; 5065 } 5066 5067 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5068 msg = "SPORT"; 5069 goto bad; 5070 } 5071 5072 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5073 msg = "DPORT"; 5074 goto bad; 5075 } 5076 5077 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5078 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5079 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5080 msg = "OAI"; 5081 goto bad; 5082 } 5083 } 5084 5085 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5086 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5087 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5088 msg = "OAR"; 5089 goto bad; 5090 } 5091 } 5092 5093 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5094 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5095 msg = "FRAG"; 5096 goto bad; 5097 } 5098 } 5099 5100 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5101 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5102 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5103 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5104 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5105 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5106 5107 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5108 type->sadb_x_nat_t_type_type, 5109 ntohs(sport->sadb_x_nat_t_port_port), 5110 ntohs(dport->sadb_x_nat_t_port_port)); 5111 5112 sav->natt_type = type->sadb_x_nat_t_type_type; 5113 key_porttosaddr(&sav->sah->saidx.src, sport->sadb_x_nat_t_port_port); 5114 key_porttosaddr(&sav->sah->saidx.dst, dport->sadb_x_nat_t_port_port); 5115 if (frag) 5116 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5117 else 5118 sav->esp_frag = IP_MAXPACKET; 5119 5120 return 0; 5121 bad: 5122 IPSECLOG(LOG_DEBUG, "invalid message %s\n", msg); 5123 __USE(msg); 5124 return -1; 5125 } 5126 5127 /* Just update the IPSEC_NAT_T ports if present */ 5128 static int 5129 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5130 const struct sadb_msghdr *mhp) 5131 { 5132 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5133 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5134 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5135 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5136 5137 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5138 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5139 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5140 struct sadb_x_nat_t_type *type; 5141 struct sadb_x_nat_t_port *sport; 5142 struct sadb_x_nat_t_port *dport; 5143 5144 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5145 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5146 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5147 IPSECLOG(LOG_DEBUG, "invalid message\n"); 5148 return -1; 5149 } 5150 5151 type = (struct sadb_x_nat_t_type *) 5152 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5153 sport = (struct sadb_x_nat_t_port *) 5154 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5155 dport = (struct sadb_x_nat_t_port *) 5156 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5157 5158 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5159 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5160 5161 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5162 type->sadb_x_nat_t_type_type, 5163 ntohs(sport->sadb_x_nat_t_port_port), 5164 ntohs(dport->sadb_x_nat_t_port_port)); 5165 } 5166 5167 return 0; 5168 } 5169 5170 5171 /* 5172 * SADB_UPDATE processing 5173 * receive 5174 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5175 * key(AE), (identity(SD),) (sensitivity)> 5176 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5177 * and send 5178 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5179 * (identity(SD),) (sensitivity)> 5180 * to the ikmpd. 5181 * 5182 * m will always be freed. 5183 */ 5184 static int 5185 key_api_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5186 { 5187 struct sadb_sa *sa0; 5188 const struct sockaddr *src, *dst; 5189 struct secasindex saidx; 5190 struct secashead *sah; 5191 struct secasvar *sav, *newsav; 5192 u_int16_t proto; 5193 u_int8_t mode; 5194 u_int16_t reqid; 5195 int error; 5196 5197 /* map satype to proto */ 5198 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5199 if (proto == 0) { 5200 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5201 return key_senderror(so, m, EINVAL); 5202 } 5203 5204 if (mhp->ext[SADB_EXT_SA] == NULL || 5205 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5206 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5207 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5208 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5209 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5210 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5211 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5212 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5213 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5214 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5215 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5216 return key_senderror(so, m, EINVAL); 5217 } 5218 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5219 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5220 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5221 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5222 return key_senderror(so, m, EINVAL); 5223 } 5224 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5225 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5226 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5227 } else { 5228 mode = IPSEC_MODE_ANY; 5229 reqid = 0; 5230 } 5231 /* XXX boundary checking for other extensions */ 5232 5233 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5234 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5235 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5236 5237 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5238 if (error != 0) 5239 return key_senderror(so, m, EINVAL); 5240 5241 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5242 if (error != 0) 5243 return key_senderror(so, m, EINVAL); 5244 5245 /* get a SA header */ 5246 sah = key_getsah(&saidx, CMP_REQID); 5247 if (sah == NULL) { 5248 IPSECLOG(LOG_DEBUG, "no SA index found.\n"); 5249 return key_senderror(so, m, ENOENT); 5250 } 5251 5252 /* set spidx if there */ 5253 /* XXX rewrite */ 5254 error = key_setident(sah, m, mhp); 5255 if (error) 5256 return key_senderror(so, m, error); 5257 5258 /* find a SA with sequence number. */ 5259 #ifdef IPSEC_DOSEQCHECK 5260 if (mhp->msg->sadb_msg_seq != 0) { 5261 sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq); 5262 if (sav == NULL) { 5263 IPSECLOG(LOG_DEBUG, 5264 "no larval SA with sequence %u exists.\n", 5265 mhp->msg->sadb_msg_seq); 5266 return key_senderror(so, m, ENOENT); 5267 } 5268 } 5269 #else 5270 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5271 if (sav == NULL) { 5272 IPSECLOG(LOG_DEBUG, "no such a SA found (spi:%u)\n", 5273 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5274 return key_senderror(so, m, EINVAL); 5275 } 5276 #endif 5277 5278 /* validity check */ 5279 if (sav->sah->saidx.proto != proto) { 5280 IPSECLOG(LOG_DEBUG, "protocol mismatched (DB=%u param=%u)\n", 5281 sav->sah->saidx.proto, proto); 5282 return key_senderror(so, m, EINVAL); 5283 } 5284 #ifdef IPSEC_DOSEQCHECK 5285 if (sav->spi != sa0->sadb_sa_spi) { 5286 IPSECLOG(LOG_DEBUG, "SPI mismatched (DB:%u param:%u)\n", 5287 (u_int32_t)ntohl(sav->spi), 5288 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5289 return key_senderror(so, m, EINVAL); 5290 } 5291 #endif 5292 if (sav->pid != mhp->msg->sadb_msg_pid) { 5293 IPSECLOG(LOG_DEBUG, "pid mismatched (DB:%u param:%u)\n", 5294 sav->pid, mhp->msg->sadb_msg_pid); 5295 return key_senderror(so, m, EINVAL); 5296 } 5297 5298 /* 5299 * Allocate a new SA instead of modifying the existing SA directly 5300 * to avoid race conditions. 5301 */ 5302 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 5303 5304 /* copy sav values */ 5305 newsav->spi = sav->spi; 5306 newsav->seq = sav->seq; 5307 newsav->created = sav->created; 5308 newsav->pid = sav->pid; 5309 5310 error = key_setsaval(newsav, m, mhp); 5311 if (error) { 5312 KEY_FREESAV(&newsav); 5313 return key_senderror(so, m, error); 5314 } 5315 5316 error = key_handle_natt_info(newsav, mhp); 5317 if (error != 0) { 5318 KEY_FREESAV(&newsav); 5319 return key_senderror(so, m, error); 5320 } 5321 5322 /* add to satree */ 5323 newsav->sah = sah; 5324 newsav->refcnt = 1; 5325 newsav->state = sav->state; 5326 /* We have to keep the order */ 5327 LIST_INSERT_AFTER(sav, newsav, chain); 5328 5329 /* check SA values to be mature. */ 5330 error = key_mature(newsav); 5331 if (error != 0) { 5332 KEY_FREESAV(&newsav); 5333 return key_senderror(so, m, error); 5334 } 5335 5336 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5337 KEY_FREESAV(&sav); 5338 5339 { 5340 struct mbuf *n; 5341 5342 /* set msg buf from mhp */ 5343 n = key_getmsgbuf_x1(m, mhp); 5344 if (n == NULL) { 5345 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5346 return key_senderror(so, m, ENOBUFS); 5347 } 5348 5349 m_freem(m); 5350 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5351 } 5352 } 5353 5354 /* 5355 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5356 * only called by key_api_update(). 5357 * OUT: 5358 * NULL : not found 5359 * others : found, pointer to a SA. 5360 */ 5361 #ifdef IPSEC_DOSEQCHECK 5362 static struct secasvar * 5363 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5364 { 5365 struct secasvar *sav; 5366 u_int state; 5367 5368 state = SADB_SASTATE_LARVAL; 5369 5370 /* search SAD with sequence number ? */ 5371 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5372 5373 KEY_CHKSASTATE(state, sav->state); 5374 5375 if (sav->seq == seq) { 5376 SA_ADDREF(sav); 5377 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5378 "DP cause refcnt++:%d SA:%p\n", 5379 sav->refcnt, sav); 5380 return sav; 5381 } 5382 } 5383 5384 return NULL; 5385 } 5386 #endif 5387 5388 /* 5389 * SADB_ADD processing 5390 * add an entry to SA database, when received 5391 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5392 * key(AE), (identity(SD),) (sensitivity)> 5393 * from the ikmpd, 5394 * and send 5395 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5396 * (identity(SD),) (sensitivity)> 5397 * to the ikmpd. 5398 * 5399 * IGNORE identity and sensitivity messages. 5400 * 5401 * m will always be freed. 5402 */ 5403 static int 5404 key_api_add(struct socket *so, struct mbuf *m, 5405 const struct sadb_msghdr *mhp) 5406 { 5407 struct sadb_sa *sa0; 5408 const struct sockaddr *src, *dst; 5409 struct secasindex saidx; 5410 struct secashead *newsah; 5411 struct secasvar *newsav; 5412 u_int16_t proto; 5413 u_int8_t mode; 5414 u_int16_t reqid; 5415 int error; 5416 5417 /* map satype to proto */ 5418 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5419 if (proto == 0) { 5420 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5421 return key_senderror(so, m, EINVAL); 5422 } 5423 5424 if (mhp->ext[SADB_EXT_SA] == NULL || 5425 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5426 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5427 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5428 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5429 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5430 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5431 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5432 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5433 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5434 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5435 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5436 return key_senderror(so, m, EINVAL); 5437 } 5438 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5439 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5440 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5441 /* XXX need more */ 5442 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5443 return key_senderror(so, m, EINVAL); 5444 } 5445 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5446 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5447 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5448 } else { 5449 mode = IPSEC_MODE_ANY; 5450 reqid = 0; 5451 } 5452 5453 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5454 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5455 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5456 5457 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5458 if (error != 0) 5459 return key_senderror(so, m, EINVAL); 5460 5461 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5462 if (error != 0) 5463 return key_senderror(so, m, EINVAL); 5464 5465 /* get a SA header */ 5466 newsah = key_getsah(&saidx, CMP_REQID); 5467 if (newsah == NULL) { 5468 /* create a new SA header */ 5469 newsah = key_newsah(&saidx); 5470 if (newsah == NULL) { 5471 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5472 return key_senderror(so, m, ENOBUFS); 5473 } 5474 } 5475 5476 /* set spidx if there */ 5477 /* XXX rewrite */ 5478 error = key_setident(newsah, m, mhp); 5479 if (error) { 5480 return key_senderror(so, m, error); 5481 } 5482 5483 /* create new SA entry. */ 5484 /* We can create new SA only if SPI is differenct. */ 5485 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5486 IPSECLOG(LOG_DEBUG, "SA already exists.\n"); 5487 return key_senderror(so, m, EEXIST); 5488 } 5489 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5490 if (newsav == NULL) { 5491 return key_senderror(so, m, error); 5492 } 5493 5494 error = key_handle_natt_info(newsav, mhp); 5495 if (error != 0) 5496 return key_senderror(so, m, EINVAL); 5497 5498 /* check SA values to be mature. */ 5499 error = key_mature(newsav); 5500 if (error != 0) { 5501 KEY_FREESAV(&newsav); 5502 return key_senderror(so, m, error); 5503 } 5504 5505 /* 5506 * don't call key_freesav() here, as we would like to keep the SA 5507 * in the database on success. 5508 */ 5509 5510 { 5511 struct mbuf *n; 5512 5513 /* set msg buf from mhp */ 5514 n = key_getmsgbuf_x1(m, mhp); 5515 if (n == NULL) { 5516 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5517 return key_senderror(so, m, ENOBUFS); 5518 } 5519 5520 m_freem(m); 5521 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5522 } 5523 } 5524 5525 /* m is retained */ 5526 static int 5527 key_setident(struct secashead *sah, struct mbuf *m, 5528 const struct sadb_msghdr *mhp) 5529 { 5530 const struct sadb_ident *idsrc, *iddst; 5531 int idsrclen, iddstlen; 5532 5533 KASSERT(!cpu_softintr_p()); 5534 KASSERT(sah != NULL); 5535 KASSERT(m != NULL); 5536 KASSERT(mhp != NULL); 5537 KASSERT(mhp->msg != NULL); 5538 5539 /* 5540 * Can be called with an existing sah from key_api_update(). 5541 */ 5542 if (sah->idents != NULL) { 5543 kmem_free(sah->idents, sah->idents_len); 5544 sah->idents = NULL; 5545 sah->idents_len = 0; 5546 } 5547 if (sah->identd != NULL) { 5548 kmem_free(sah->identd, sah->identd_len); 5549 sah->identd = NULL; 5550 sah->identd_len = 0; 5551 } 5552 5553 /* don't make buffer if not there */ 5554 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5555 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5556 sah->idents = NULL; 5557 sah->identd = NULL; 5558 return 0; 5559 } 5560 5561 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5562 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5563 IPSECLOG(LOG_DEBUG, "invalid identity.\n"); 5564 return EINVAL; 5565 } 5566 5567 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5568 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5569 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5570 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5571 5572 /* validity check */ 5573 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5574 IPSECLOG(LOG_DEBUG, "ident type mismatch.\n"); 5575 return EINVAL; 5576 } 5577 5578 switch (idsrc->sadb_ident_type) { 5579 case SADB_IDENTTYPE_PREFIX: 5580 case SADB_IDENTTYPE_FQDN: 5581 case SADB_IDENTTYPE_USERFQDN: 5582 default: 5583 /* XXX do nothing */ 5584 sah->idents = NULL; 5585 sah->identd = NULL; 5586 return 0; 5587 } 5588 5589 /* make structure */ 5590 sah->idents = kmem_alloc(idsrclen, KM_SLEEP); 5591 sah->idents_len = idsrclen; 5592 sah->identd = kmem_alloc(iddstlen, KM_SLEEP); 5593 sah->identd_len = iddstlen; 5594 memcpy(sah->idents, idsrc, idsrclen); 5595 memcpy(sah->identd, iddst, iddstlen); 5596 5597 return 0; 5598 } 5599 5600 /* 5601 * m will not be freed on return. 5602 * it is caller's responsibility to free the result. 5603 */ 5604 static struct mbuf * 5605 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5606 { 5607 struct mbuf *n; 5608 5609 KASSERT(m != NULL); 5610 KASSERT(mhp != NULL); 5611 KASSERT(mhp->msg != NULL); 5612 5613 /* create new sadb_msg to reply. */ 5614 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5615 SADB_EXT_SA, SADB_X_EXT_SA2, 5616 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5617 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5618 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5619 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5620 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5621 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5622 if (!n) 5623 return NULL; 5624 5625 if (n->m_len < sizeof(struct sadb_msg)) { 5626 n = m_pullup(n, sizeof(struct sadb_msg)); 5627 if (n == NULL) 5628 return NULL; 5629 } 5630 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5631 mtod(n, struct sadb_msg *)->sadb_msg_len = 5632 PFKEY_UNIT64(n->m_pkthdr.len); 5633 5634 return n; 5635 } 5636 5637 static int key_delete_all (struct socket *, struct mbuf *, 5638 const struct sadb_msghdr *, u_int16_t); 5639 5640 /* 5641 * SADB_DELETE processing 5642 * receive 5643 * <base, SA(*), address(SD)> 5644 * from the ikmpd, and set SADB_SASTATE_DEAD, 5645 * and send, 5646 * <base, SA(*), address(SD)> 5647 * to the ikmpd. 5648 * 5649 * m will always be freed. 5650 */ 5651 static int 5652 key_api_delete(struct socket *so, struct mbuf *m, 5653 const struct sadb_msghdr *mhp) 5654 { 5655 struct sadb_sa *sa0; 5656 const struct sockaddr *src, *dst; 5657 struct secasindex saidx; 5658 struct secashead *sah; 5659 struct secasvar *sav = NULL; 5660 u_int16_t proto; 5661 int error; 5662 5663 /* map satype to proto */ 5664 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5665 if (proto == 0) { 5666 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5667 return key_senderror(so, m, EINVAL); 5668 } 5669 5670 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5671 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5672 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5673 return key_senderror(so, m, EINVAL); 5674 } 5675 5676 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5677 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5678 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5679 return key_senderror(so, m, EINVAL); 5680 } 5681 5682 if (mhp->ext[SADB_EXT_SA] == NULL) { 5683 /* 5684 * Caller wants us to delete all non-LARVAL SAs 5685 * that match the src/dst. This is used during 5686 * IKE INITIAL-CONTACT. 5687 */ 5688 IPSECLOG(LOG_DEBUG, "doing delete all.\n"); 5689 return key_delete_all(so, m, mhp, proto); 5690 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5691 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5692 return key_senderror(so, m, EINVAL); 5693 } 5694 5695 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5696 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5697 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5698 5699 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5700 if (error != 0) 5701 return key_senderror(so, m, EINVAL); 5702 5703 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5704 if (error != 0) 5705 return key_senderror(so, m, EINVAL); 5706 5707 /* get a SA header */ 5708 sah = key_getsah(&saidx, CMP_HEAD); 5709 if (sah != NULL) { 5710 /* get a SA with SPI. */ 5711 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5712 } 5713 5714 if (sav == NULL) { 5715 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5716 return key_senderror(so, m, ENOENT); 5717 } 5718 5719 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5720 KEY_FREESAV(&sav); 5721 5722 { 5723 struct mbuf *n; 5724 5725 /* create new sadb_msg to reply. */ 5726 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5727 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5728 if (!n) 5729 return key_senderror(so, m, ENOBUFS); 5730 5731 n = key_fill_replymsg(n, 0); 5732 if (n == NULL) 5733 return key_senderror(so, m, ENOBUFS); 5734 5735 m_freem(m); 5736 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5737 } 5738 } 5739 5740 /* 5741 * delete all SAs for src/dst. Called from key_api_delete(). 5742 */ 5743 static int 5744 key_delete_all(struct socket *so, struct mbuf *m, 5745 const struct sadb_msghdr *mhp, u_int16_t proto) 5746 { 5747 const struct sockaddr *src, *dst; 5748 struct secasindex saidx; 5749 struct secashead *sah; 5750 struct secasvar *sav, *nextsav; 5751 u_int state; 5752 int error; 5753 5754 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5755 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5756 5757 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5758 if (error != 0) 5759 return key_senderror(so, m, EINVAL); 5760 5761 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5762 if (error != 0) 5763 return key_senderror(so, m, EINVAL); 5764 5765 sah = key_getsah(&saidx, CMP_HEAD); 5766 if (sah != NULL) { 5767 /* Delete all non-LARVAL SAs. */ 5768 SASTATE_ALIVE_FOREACH(state) { 5769 if (state == SADB_SASTATE_LARVAL) 5770 continue; 5771 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 5772 nextsav) { 5773 /* sanity check */ 5774 if (sav->state != state) { 5775 IPSECLOG(LOG_DEBUG, 5776 "invalid sav->state " 5777 "(queue: %d SA: %d)\n", 5778 state, sav->state); 5779 continue; 5780 } 5781 5782 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5783 KEY_FREESAV(&sav); 5784 } 5785 } 5786 } 5787 { 5788 struct mbuf *n; 5789 5790 /* create new sadb_msg to reply. */ 5791 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5792 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5793 if (!n) 5794 return key_senderror(so, m, ENOBUFS); 5795 5796 n = key_fill_replymsg(n, 0); 5797 if (n == NULL) 5798 return key_senderror(so, m, ENOBUFS); 5799 5800 m_freem(m); 5801 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5802 } 5803 } 5804 5805 /* 5806 * SADB_GET processing 5807 * receive 5808 * <base, SA(*), address(SD)> 5809 * from the ikmpd, and get a SP and a SA to respond, 5810 * and send, 5811 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5812 * (identity(SD),) (sensitivity)> 5813 * to the ikmpd. 5814 * 5815 * m will always be freed. 5816 */ 5817 static int 5818 key_api_get(struct socket *so, struct mbuf *m, 5819 const struct sadb_msghdr *mhp) 5820 { 5821 struct sadb_sa *sa0; 5822 const struct sockaddr *src, *dst; 5823 struct secasindex saidx; 5824 struct secashead *sah; 5825 struct secasvar *sav = NULL; 5826 u_int16_t proto; 5827 int error; 5828 5829 /* map satype to proto */ 5830 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5831 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5832 return key_senderror(so, m, EINVAL); 5833 } 5834 5835 if (mhp->ext[SADB_EXT_SA] == NULL || 5836 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5837 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5838 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5839 return key_senderror(so, m, EINVAL); 5840 } 5841 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5842 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5843 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5844 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5845 return key_senderror(so, m, EINVAL); 5846 } 5847 5848 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5849 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5850 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5851 5852 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5853 if (error != 0) 5854 return key_senderror(so, m, EINVAL); 5855 5856 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5857 if (error != 0) 5858 return key_senderror(so, m, EINVAL); 5859 5860 /* get a SA header */ 5861 sah = key_getsah(&saidx, CMP_HEAD); 5862 if (sah != NULL) { 5863 /* get a SA with SPI. */ 5864 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5865 } 5866 if (sav == NULL) { 5867 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5868 return key_senderror(so, m, ENOENT); 5869 } 5870 5871 { 5872 struct mbuf *n; 5873 u_int8_t satype; 5874 5875 /* map proto to satype */ 5876 satype = key_proto2satype(sah->saidx.proto); 5877 if (satype == 0) { 5878 IPSECLOG(LOG_DEBUG, "there was invalid proto in SAD.\n"); 5879 return key_senderror(so, m, EINVAL); 5880 } 5881 5882 /* create new sadb_msg to reply. */ 5883 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5884 mhp->msg->sadb_msg_pid); 5885 if (!n) 5886 return key_senderror(so, m, ENOBUFS); 5887 5888 m_freem(m); 5889 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5890 } 5891 } 5892 5893 /* XXX make it sysctl-configurable? */ 5894 static void 5895 key_getcomb_setlifetime(struct sadb_comb *comb) 5896 { 5897 5898 comb->sadb_comb_soft_allocations = 1; 5899 comb->sadb_comb_hard_allocations = 1; 5900 comb->sadb_comb_soft_bytes = 0; 5901 comb->sadb_comb_hard_bytes = 0; 5902 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5903 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5904 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5905 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5906 } 5907 5908 /* 5909 * XXX reorder combinations by preference 5910 * XXX no idea if the user wants ESP authentication or not 5911 */ 5912 static struct mbuf * 5913 key_getcomb_esp(void) 5914 { 5915 struct sadb_comb *comb; 5916 const struct enc_xform *algo; 5917 struct mbuf *result = NULL, *m, *n; 5918 int encmin; 5919 int i, off, o; 5920 int totlen; 5921 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5922 5923 m = NULL; 5924 for (i = 1; i <= SADB_EALG_MAX; i++) { 5925 algo = esp_algorithm_lookup(i); 5926 if (algo == NULL) 5927 continue; 5928 5929 /* discard algorithms with key size smaller than system min */ 5930 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5931 continue; 5932 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5933 encmin = ipsec_esp_keymin; 5934 else 5935 encmin = _BITS(algo->minkey); 5936 5937 if (ipsec_esp_auth) 5938 m = key_getcomb_ah(); 5939 else { 5940 KASSERTMSG(l <= MLEN, 5941 "l=%u > MLEN=%lu", l, (u_long) MLEN); 5942 MGET(m, M_DONTWAIT, MT_DATA); 5943 if (m) { 5944 M_ALIGN(m, l); 5945 m->m_len = l; 5946 m->m_next = NULL; 5947 memset(mtod(m, void *), 0, m->m_len); 5948 } 5949 } 5950 if (!m) 5951 goto fail; 5952 5953 totlen = 0; 5954 for (n = m; n; n = n->m_next) 5955 totlen += n->m_len; 5956 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 5957 5958 for (off = 0; off < totlen; off += l) { 5959 n = m_pulldown(m, off, l, &o); 5960 if (!n) { 5961 /* m is already freed */ 5962 goto fail; 5963 } 5964 comb = (struct sadb_comb *)(mtod(n, char *) + o); 5965 memset(comb, 0, sizeof(*comb)); 5966 key_getcomb_setlifetime(comb); 5967 comb->sadb_comb_encrypt = i; 5968 comb->sadb_comb_encrypt_minbits = encmin; 5969 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5970 } 5971 5972 if (!result) 5973 result = m; 5974 else 5975 m_cat(result, m); 5976 } 5977 5978 return result; 5979 5980 fail: 5981 if (result) 5982 m_freem(result); 5983 return NULL; 5984 } 5985 5986 static void 5987 key_getsizes_ah(const struct auth_hash *ah, int alg, 5988 u_int16_t* ksmin, u_int16_t* ksmax) 5989 { 5990 *ksmin = *ksmax = ah->keysize; 5991 if (ah->keysize == 0) { 5992 /* 5993 * Transform takes arbitrary key size but algorithm 5994 * key size is restricted. Enforce this here. 5995 */ 5996 switch (alg) { 5997 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 5998 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 5999 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 6000 default: 6001 IPSECLOG(LOG_DEBUG, "unknown AH algorithm %u\n", alg); 6002 break; 6003 } 6004 } 6005 } 6006 6007 /* 6008 * XXX reorder combinations by preference 6009 */ 6010 static struct mbuf * 6011 key_getcomb_ah(void) 6012 { 6013 struct sadb_comb *comb; 6014 const struct auth_hash *algo; 6015 struct mbuf *m; 6016 u_int16_t minkeysize, maxkeysize; 6017 int i; 6018 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6019 6020 m = NULL; 6021 for (i = 1; i <= SADB_AALG_MAX; i++) { 6022 #if 1 6023 /* we prefer HMAC algorithms, not old algorithms */ 6024 if (i != SADB_AALG_SHA1HMAC && 6025 i != SADB_AALG_MD5HMAC && 6026 i != SADB_X_AALG_SHA2_256 && 6027 i != SADB_X_AALG_SHA2_384 && 6028 i != SADB_X_AALG_SHA2_512) 6029 continue; 6030 #endif 6031 algo = ah_algorithm_lookup(i); 6032 if (!algo) 6033 continue; 6034 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6035 /* discard algorithms with key size smaller than system min */ 6036 if (_BITS(minkeysize) < ipsec_ah_keymin) 6037 continue; 6038 6039 if (!m) { 6040 KASSERTMSG(l <= MLEN, 6041 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6042 MGET(m, M_DONTWAIT, MT_DATA); 6043 if (m) { 6044 M_ALIGN(m, l); 6045 m->m_len = l; 6046 m->m_next = NULL; 6047 } 6048 } else 6049 M_PREPEND(m, l, M_DONTWAIT); 6050 if (!m) 6051 return NULL; 6052 6053 if (m->m_len < sizeof(struct sadb_comb)) { 6054 m = m_pullup(m, sizeof(struct sadb_comb)); 6055 if (m == NULL) 6056 return NULL; 6057 } 6058 6059 comb = mtod(m, struct sadb_comb *); 6060 memset(comb, 0, sizeof(*comb)); 6061 key_getcomb_setlifetime(comb); 6062 comb->sadb_comb_auth = i; 6063 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6064 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6065 } 6066 6067 return m; 6068 } 6069 6070 /* 6071 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6072 * XXX reorder combinations by preference 6073 */ 6074 static struct mbuf * 6075 key_getcomb_ipcomp(void) 6076 { 6077 struct sadb_comb *comb; 6078 const struct comp_algo *algo; 6079 struct mbuf *m; 6080 int i; 6081 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6082 6083 m = NULL; 6084 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6085 algo = ipcomp_algorithm_lookup(i); 6086 if (!algo) 6087 continue; 6088 6089 if (!m) { 6090 KASSERTMSG(l <= MLEN, 6091 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6092 MGET(m, M_DONTWAIT, MT_DATA); 6093 if (m) { 6094 M_ALIGN(m, l); 6095 m->m_len = l; 6096 m->m_next = NULL; 6097 } 6098 } else 6099 M_PREPEND(m, l, M_DONTWAIT); 6100 if (!m) 6101 return NULL; 6102 6103 if (m->m_len < sizeof(struct sadb_comb)) { 6104 m = m_pullup(m, sizeof(struct sadb_comb)); 6105 if (m == NULL) 6106 return NULL; 6107 } 6108 6109 comb = mtod(m, struct sadb_comb *); 6110 memset(comb, 0, sizeof(*comb)); 6111 key_getcomb_setlifetime(comb); 6112 comb->sadb_comb_encrypt = i; 6113 /* what should we set into sadb_comb_*_{min,max}bits? */ 6114 } 6115 6116 return m; 6117 } 6118 6119 /* 6120 * XXX no way to pass mode (transport/tunnel) to userland 6121 * XXX replay checking? 6122 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6123 */ 6124 static struct mbuf * 6125 key_getprop(const struct secasindex *saidx) 6126 { 6127 struct sadb_prop *prop; 6128 struct mbuf *m, *n; 6129 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6130 int totlen; 6131 6132 switch (saidx->proto) { 6133 case IPPROTO_ESP: 6134 m = key_getcomb_esp(); 6135 break; 6136 case IPPROTO_AH: 6137 m = key_getcomb_ah(); 6138 break; 6139 case IPPROTO_IPCOMP: 6140 m = key_getcomb_ipcomp(); 6141 break; 6142 default: 6143 return NULL; 6144 } 6145 6146 if (!m) 6147 return NULL; 6148 M_PREPEND(m, l, M_DONTWAIT); 6149 if (!m) 6150 return NULL; 6151 6152 totlen = 0; 6153 for (n = m; n; n = n->m_next) 6154 totlen += n->m_len; 6155 6156 prop = mtod(m, struct sadb_prop *); 6157 memset(prop, 0, sizeof(*prop)); 6158 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6159 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6160 prop->sadb_prop_replay = 32; /* XXX */ 6161 6162 return m; 6163 } 6164 6165 /* 6166 * SADB_ACQUIRE processing called by key_checkrequest() and key_api_acquire(). 6167 * send 6168 * <base, SA, address(SD), (address(P)), x_policy, 6169 * (identity(SD),) (sensitivity,) proposal> 6170 * to KMD, and expect to receive 6171 * <base> with SADB_ACQUIRE if error occurred, 6172 * or 6173 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6174 * from KMD by PF_KEY. 6175 * 6176 * XXX x_policy is outside of RFC2367 (KAME extension). 6177 * XXX sensitivity is not supported. 6178 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6179 * see comment for key_getcomb_ipcomp(). 6180 * 6181 * OUT: 6182 * 0 : succeed 6183 * others: error number 6184 */ 6185 static int 6186 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6187 { 6188 struct mbuf *result = NULL, *m; 6189 #ifndef IPSEC_NONBLOCK_ACQUIRE 6190 struct secacq *newacq; 6191 #endif 6192 u_int8_t satype; 6193 int error = -1; 6194 u_int32_t seq; 6195 6196 /* sanity check */ 6197 KASSERT(saidx != NULL); 6198 satype = key_proto2satype(saidx->proto); 6199 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6200 6201 #ifndef IPSEC_NONBLOCK_ACQUIRE 6202 /* 6203 * We never do anything about acquirng SA. There is anather 6204 * solution that kernel blocks to send SADB_ACQUIRE message until 6205 * getting something message from IKEd. In later case, to be 6206 * managed with ACQUIRING list. 6207 */ 6208 /* Get an entry to check whether sending message or not. */ 6209 mutex_enter(&key_mtx); 6210 newacq = key_getacq(saidx); 6211 if (newacq != NULL) { 6212 if (key_blockacq_count < newacq->count) { 6213 /* reset counter and do send message. */ 6214 newacq->count = 0; 6215 } else { 6216 /* increment counter and do nothing. */ 6217 newacq->count++; 6218 mutex_exit(&key_mtx); 6219 return 0; 6220 } 6221 } else { 6222 /* make new entry for blocking to send SADB_ACQUIRE. */ 6223 newacq = key_newacq(saidx); 6224 if (newacq == NULL) 6225 return ENOBUFS; 6226 6227 /* add to acqtree */ 6228 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6229 } 6230 6231 seq = newacq->seq; 6232 mutex_exit(&key_mtx); 6233 #else 6234 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6235 #endif 6236 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6237 if (!m) { 6238 error = ENOBUFS; 6239 goto fail; 6240 } 6241 result = m; 6242 6243 /* set sadb_address for saidx's. */ 6244 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &saidx->src.sa, FULLMASK, 6245 IPSEC_ULPROTO_ANY); 6246 if (!m) { 6247 error = ENOBUFS; 6248 goto fail; 6249 } 6250 m_cat(result, m); 6251 6252 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &saidx->dst.sa, FULLMASK, 6253 IPSEC_ULPROTO_ANY); 6254 if (!m) { 6255 error = ENOBUFS; 6256 goto fail; 6257 } 6258 m_cat(result, m); 6259 6260 /* XXX proxy address (optional) */ 6261 6262 /* set sadb_x_policy */ 6263 if (sp) { 6264 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6265 if (!m) { 6266 error = ENOBUFS; 6267 goto fail; 6268 } 6269 m_cat(result, m); 6270 } 6271 6272 /* XXX identity (optional) */ 6273 #if 0 6274 if (idexttype && fqdn) { 6275 /* create identity extension (FQDN) */ 6276 struct sadb_ident *id; 6277 int fqdnlen; 6278 6279 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6280 id = (struct sadb_ident *)p; 6281 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6282 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6283 id->sadb_ident_exttype = idexttype; 6284 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6285 memcpy(id + 1, fqdn, fqdnlen); 6286 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6287 } 6288 6289 if (idexttype) { 6290 /* create identity extension (USERFQDN) */ 6291 struct sadb_ident *id; 6292 int userfqdnlen; 6293 6294 if (userfqdn) { 6295 /* +1 for terminating-NUL */ 6296 userfqdnlen = strlen(userfqdn) + 1; 6297 } else 6298 userfqdnlen = 0; 6299 id = (struct sadb_ident *)p; 6300 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6301 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6302 id->sadb_ident_exttype = idexttype; 6303 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6304 /* XXX is it correct? */ 6305 if (curlwp) 6306 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6307 if (userfqdn && userfqdnlen) 6308 memcpy(id + 1, userfqdn, userfqdnlen); 6309 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6310 } 6311 #endif 6312 6313 /* XXX sensitivity (optional) */ 6314 6315 /* create proposal/combination extension */ 6316 m = key_getprop(saidx); 6317 #if 0 6318 /* 6319 * spec conformant: always attach proposal/combination extension, 6320 * the problem is that we have no way to attach it for ipcomp, 6321 * due to the way sadb_comb is declared in RFC2367. 6322 */ 6323 if (!m) { 6324 error = ENOBUFS; 6325 goto fail; 6326 } 6327 m_cat(result, m); 6328 #else 6329 /* 6330 * outside of spec; make proposal/combination extension optional. 6331 */ 6332 if (m) 6333 m_cat(result, m); 6334 #endif 6335 6336 if ((result->m_flags & M_PKTHDR) == 0) { 6337 error = EINVAL; 6338 goto fail; 6339 } 6340 6341 if (result->m_len < sizeof(struct sadb_msg)) { 6342 result = m_pullup(result, sizeof(struct sadb_msg)); 6343 if (result == NULL) { 6344 error = ENOBUFS; 6345 goto fail; 6346 } 6347 } 6348 6349 result->m_pkthdr.len = 0; 6350 for (m = result; m; m = m->m_next) 6351 result->m_pkthdr.len += m->m_len; 6352 6353 mtod(result, struct sadb_msg *)->sadb_msg_len = 6354 PFKEY_UNIT64(result->m_pkthdr.len); 6355 6356 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6357 6358 fail: 6359 if (result) 6360 m_freem(result); 6361 return error; 6362 } 6363 6364 #ifndef IPSEC_NONBLOCK_ACQUIRE 6365 static struct secacq * 6366 key_newacq(const struct secasindex *saidx) 6367 { 6368 struct secacq *newacq; 6369 6370 /* get new entry */ 6371 newacq = kmem_intr_zalloc(sizeof(struct secacq), KM_NOSLEEP); 6372 if (newacq == NULL) { 6373 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6374 return NULL; 6375 } 6376 6377 /* copy secindex */ 6378 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6379 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6380 newacq->created = time_uptime; 6381 newacq->count = 0; 6382 6383 return newacq; 6384 } 6385 6386 static struct secacq * 6387 key_getacq(const struct secasindex *saidx) 6388 { 6389 struct secacq *acq; 6390 6391 KASSERT(mutex_owned(&key_mtx)); 6392 6393 LIST_FOREACH(acq, &acqtree, chain) { 6394 if (key_saidx_match(saidx, &acq->saidx, CMP_EXACTLY)) 6395 return acq; 6396 } 6397 6398 return NULL; 6399 } 6400 6401 static struct secacq * 6402 key_getacqbyseq(u_int32_t seq) 6403 { 6404 struct secacq *acq; 6405 6406 KASSERT(mutex_owned(&key_mtx)); 6407 6408 LIST_FOREACH(acq, &acqtree, chain) { 6409 if (acq->seq == seq) 6410 return acq; 6411 } 6412 6413 return NULL; 6414 } 6415 #endif 6416 6417 #ifdef notyet 6418 static struct secspacq * 6419 key_newspacq(const struct secpolicyindex *spidx) 6420 { 6421 struct secspacq *acq; 6422 6423 /* get new entry */ 6424 acq = kmem_intr_zalloc(sizeof(struct secspacq), KM_NOSLEEP); 6425 if (acq == NULL) { 6426 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6427 return NULL; 6428 } 6429 6430 /* copy secindex */ 6431 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6432 acq->created = time_uptime; 6433 acq->count = 0; 6434 6435 return acq; 6436 } 6437 6438 static struct secspacq * 6439 key_getspacq(const struct secpolicyindex *spidx) 6440 { 6441 struct secspacq *acq; 6442 6443 LIST_FOREACH(acq, &spacqtree, chain) { 6444 if (key_spidx_match_exactly(spidx, &acq->spidx)) 6445 return acq; 6446 } 6447 6448 return NULL; 6449 } 6450 #endif /* notyet */ 6451 6452 /* 6453 * SADB_ACQUIRE processing, 6454 * in first situation, is receiving 6455 * <base> 6456 * from the ikmpd, and clear sequence of its secasvar entry. 6457 * 6458 * In second situation, is receiving 6459 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6460 * from a user land process, and return 6461 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6462 * to the socket. 6463 * 6464 * m will always be freed. 6465 */ 6466 static int 6467 key_api_acquire(struct socket *so, struct mbuf *m, 6468 const struct sadb_msghdr *mhp) 6469 { 6470 const struct sockaddr *src, *dst; 6471 struct secasindex saidx; 6472 struct secashead *sah; 6473 u_int16_t proto; 6474 int error; 6475 6476 /* 6477 * Error message from KMd. 6478 * We assume that if error was occurred in IKEd, the length of PFKEY 6479 * message is equal to the size of sadb_msg structure. 6480 * We do not raise error even if error occurred in this function. 6481 */ 6482 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6483 #ifndef IPSEC_NONBLOCK_ACQUIRE 6484 struct secacq *acq; 6485 6486 /* check sequence number */ 6487 if (mhp->msg->sadb_msg_seq == 0) { 6488 IPSECLOG(LOG_DEBUG, "must specify sequence number.\n"); 6489 m_freem(m); 6490 return 0; 6491 } 6492 6493 mutex_enter(&key_mtx); 6494 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 6495 if (acq == NULL) { 6496 mutex_exit(&key_mtx); 6497 /* 6498 * the specified larval SA is already gone, or we got 6499 * a bogus sequence number. we can silently ignore it. 6500 */ 6501 m_freem(m); 6502 return 0; 6503 } 6504 6505 /* reset acq counter in order to deletion by timehander. */ 6506 acq->created = time_uptime; 6507 acq->count = 0; 6508 mutex_exit(&key_mtx); 6509 #endif 6510 m_freem(m); 6511 return 0; 6512 } 6513 6514 /* 6515 * This message is from user land. 6516 */ 6517 6518 /* map satype to proto */ 6519 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6520 if (proto == 0) { 6521 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6522 return key_senderror(so, m, EINVAL); 6523 } 6524 6525 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6526 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6527 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6528 /* error */ 6529 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6530 return key_senderror(so, m, EINVAL); 6531 } 6532 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6533 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6534 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6535 /* error */ 6536 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6537 return key_senderror(so, m, EINVAL); 6538 } 6539 6540 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6541 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6542 6543 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6544 if (error != 0) 6545 return key_senderror(so, m, EINVAL); 6546 6547 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6548 if (error != 0) 6549 return key_senderror(so, m, EINVAL); 6550 6551 /* get a SA index */ 6552 sah = key_getsah(&saidx, CMP_MODE_REQID); 6553 if (sah != NULL) { 6554 IPSECLOG(LOG_DEBUG, "a SA exists already.\n"); 6555 return key_senderror(so, m, EEXIST); 6556 } 6557 6558 error = key_acquire(&saidx, NULL); 6559 if (error != 0) { 6560 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 6561 error); 6562 return key_senderror(so, m, error); 6563 } 6564 6565 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6566 } 6567 6568 /* 6569 * SADB_REGISTER processing. 6570 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6571 * receive 6572 * <base> 6573 * from the ikmpd, and register a socket to send PF_KEY messages, 6574 * and send 6575 * <base, supported> 6576 * to KMD by PF_KEY. 6577 * If socket is detached, must free from regnode. 6578 * 6579 * m will always be freed. 6580 */ 6581 static int 6582 key_api_register(struct socket *so, struct mbuf *m, 6583 const struct sadb_msghdr *mhp) 6584 { 6585 struct secreg *reg, *newreg = 0; 6586 6587 /* check for invalid register message */ 6588 if (mhp->msg->sadb_msg_satype >= __arraycount(regtree)) 6589 return key_senderror(so, m, EINVAL); 6590 6591 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6592 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6593 goto setmsg; 6594 6595 /* Allocate regnode in advance, out of mutex */ 6596 newreg = kmem_zalloc(sizeof(*newreg), KM_SLEEP); 6597 6598 /* check whether existing or not */ 6599 mutex_enter(&key_mtx); 6600 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6601 if (reg->so == so) { 6602 IPSECLOG(LOG_DEBUG, "socket exists already.\n"); 6603 mutex_exit(&key_mtx); 6604 kmem_free(newreg, sizeof(*newreg)); 6605 return key_senderror(so, m, EEXIST); 6606 } 6607 } 6608 6609 newreg->so = so; 6610 ((struct keycb *)sotorawcb(so))->kp_registered++; 6611 6612 /* add regnode to regtree. */ 6613 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6614 mutex_exit(&key_mtx); 6615 6616 setmsg: 6617 { 6618 struct mbuf *n; 6619 struct sadb_supported *sup; 6620 u_int len, alen, elen; 6621 int off; 6622 int i; 6623 struct sadb_alg *alg; 6624 6625 /* create new sadb_msg to reply. */ 6626 alen = 0; 6627 for (i = 1; i <= SADB_AALG_MAX; i++) { 6628 if (ah_algorithm_lookup(i)) 6629 alen += sizeof(struct sadb_alg); 6630 } 6631 if (alen) 6632 alen += sizeof(struct sadb_supported); 6633 elen = 0; 6634 for (i = 1; i <= SADB_EALG_MAX; i++) { 6635 if (esp_algorithm_lookup(i)) 6636 elen += sizeof(struct sadb_alg); 6637 } 6638 if (elen) 6639 elen += sizeof(struct sadb_supported); 6640 6641 len = sizeof(struct sadb_msg) + alen + elen; 6642 6643 if (len > MCLBYTES) 6644 return key_senderror(so, m, ENOBUFS); 6645 6646 MGETHDR(n, M_DONTWAIT, MT_DATA); 6647 if (len > MHLEN) { 6648 MCLGET(n, M_DONTWAIT); 6649 if ((n->m_flags & M_EXT) == 0) { 6650 m_freem(n); 6651 n = NULL; 6652 } 6653 } 6654 if (!n) 6655 return key_senderror(so, m, ENOBUFS); 6656 6657 n->m_pkthdr.len = n->m_len = len; 6658 n->m_next = NULL; 6659 off = 0; 6660 6661 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6662 n = key_fill_replymsg(n, 0); 6663 if (n == NULL) 6664 return key_senderror(so, m, ENOBUFS); 6665 6666 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6667 6668 /* for authentication algorithm */ 6669 if (alen) { 6670 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6671 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6672 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6673 off += PFKEY_ALIGN8(sizeof(*sup)); 6674 6675 for (i = 1; i <= SADB_AALG_MAX; i++) { 6676 const struct auth_hash *aalgo; 6677 u_int16_t minkeysize, maxkeysize; 6678 6679 aalgo = ah_algorithm_lookup(i); 6680 if (!aalgo) 6681 continue; 6682 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6683 alg->sadb_alg_id = i; 6684 alg->sadb_alg_ivlen = 0; 6685 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6686 alg->sadb_alg_minbits = _BITS(minkeysize); 6687 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6688 off += PFKEY_ALIGN8(sizeof(*alg)); 6689 } 6690 } 6691 6692 /* for encryption algorithm */ 6693 if (elen) { 6694 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6695 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6696 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6697 off += PFKEY_ALIGN8(sizeof(*sup)); 6698 6699 for (i = 1; i <= SADB_EALG_MAX; i++) { 6700 const struct enc_xform *ealgo; 6701 6702 ealgo = esp_algorithm_lookup(i); 6703 if (!ealgo) 6704 continue; 6705 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6706 alg->sadb_alg_id = i; 6707 alg->sadb_alg_ivlen = ealgo->blocksize; 6708 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6709 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6710 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6711 } 6712 } 6713 6714 KASSERTMSG(off == len, "length inconsistency"); 6715 6716 m_freem(m); 6717 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6718 } 6719 } 6720 6721 /* 6722 * free secreg entry registered. 6723 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6724 */ 6725 void 6726 key_freereg(struct socket *so) 6727 { 6728 struct secreg *reg; 6729 int i; 6730 6731 KASSERT(!cpu_softintr_p()); 6732 KASSERT(so != NULL); 6733 6734 /* 6735 * check whether existing or not. 6736 * check all type of SA, because there is a potential that 6737 * one socket is registered to multiple type of SA. 6738 */ 6739 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6740 mutex_enter(&key_mtx); 6741 LIST_FOREACH(reg, ®tree[i], chain) { 6742 if (reg->so == so) { 6743 LIST_REMOVE(reg, chain); 6744 break; 6745 } 6746 } 6747 mutex_exit(&key_mtx); 6748 if (reg != NULL) 6749 kmem_free(reg, sizeof(*reg)); 6750 } 6751 6752 return; 6753 } 6754 6755 /* 6756 * SADB_EXPIRE processing 6757 * send 6758 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6759 * to KMD by PF_KEY. 6760 * NOTE: We send only soft lifetime extension. 6761 * 6762 * OUT: 0 : succeed 6763 * others : error number 6764 */ 6765 static int 6766 key_expire(struct secasvar *sav) 6767 { 6768 int s; 6769 int satype; 6770 struct mbuf *result = NULL, *m; 6771 int len; 6772 int error = -1; 6773 struct sadb_lifetime *lt; 6774 6775 /* XXX: Why do we lock ? */ 6776 s = splsoftnet(); /*called from softclock()*/ 6777 6778 KASSERT(sav != NULL); 6779 KASSERT(sav->sah != NULL); 6780 6781 satype = key_proto2satype(sav->sah->saidx.proto); 6782 KASSERTMSG(satype != 0, "invalid proto is passed"); 6783 6784 /* set msg header */ 6785 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6786 if (!m) { 6787 error = ENOBUFS; 6788 goto fail; 6789 } 6790 result = m; 6791 6792 /* create SA extension */ 6793 m = key_setsadbsa(sav); 6794 if (!m) { 6795 error = ENOBUFS; 6796 goto fail; 6797 } 6798 m_cat(result, m); 6799 6800 /* create SA extension */ 6801 m = key_setsadbxsa2(sav->sah->saidx.mode, 6802 sav->replay ? sav->replay->count : 0, sav->sah->saidx.reqid); 6803 if (!m) { 6804 error = ENOBUFS; 6805 goto fail; 6806 } 6807 m_cat(result, m); 6808 6809 /* create lifetime extension (current and soft) */ 6810 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6811 m = key_alloc_mbuf(len); 6812 if (!m || m->m_next) { /*XXX*/ 6813 if (m) 6814 m_freem(m); 6815 error = ENOBUFS; 6816 goto fail; 6817 } 6818 memset(mtod(m, void *), 0, len); 6819 lt = mtod(m, struct sadb_lifetime *); 6820 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6821 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6822 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6823 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6824 lt->sadb_lifetime_addtime = 6825 time_mono_to_wall(sav->lft_c->sadb_lifetime_addtime); 6826 lt->sadb_lifetime_usetime = 6827 time_mono_to_wall(sav->lft_c->sadb_lifetime_usetime); 6828 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6829 memcpy(lt, sav->lft_s, sizeof(*lt)); 6830 m_cat(result, m); 6831 6832 /* set sadb_address for source */ 6833 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 6834 FULLMASK, IPSEC_ULPROTO_ANY); 6835 if (!m) { 6836 error = ENOBUFS; 6837 goto fail; 6838 } 6839 m_cat(result, m); 6840 6841 /* set sadb_address for destination */ 6842 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.dst.sa, 6843 FULLMASK, IPSEC_ULPROTO_ANY); 6844 if (!m) { 6845 error = ENOBUFS; 6846 goto fail; 6847 } 6848 m_cat(result, m); 6849 6850 if ((result->m_flags & M_PKTHDR) == 0) { 6851 error = EINVAL; 6852 goto fail; 6853 } 6854 6855 if (result->m_len < sizeof(struct sadb_msg)) { 6856 result = m_pullup(result, sizeof(struct sadb_msg)); 6857 if (result == NULL) { 6858 error = ENOBUFS; 6859 goto fail; 6860 } 6861 } 6862 6863 result->m_pkthdr.len = 0; 6864 for (m = result; m; m = m->m_next) 6865 result->m_pkthdr.len += m->m_len; 6866 6867 mtod(result, struct sadb_msg *)->sadb_msg_len = 6868 PFKEY_UNIT64(result->m_pkthdr.len); 6869 6870 splx(s); 6871 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6872 6873 fail: 6874 if (result) 6875 m_freem(result); 6876 splx(s); 6877 return error; 6878 } 6879 6880 /* 6881 * SADB_FLUSH processing 6882 * receive 6883 * <base> 6884 * from the ikmpd, and free all entries in secastree. 6885 * and send, 6886 * <base> 6887 * to the ikmpd. 6888 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6889 * 6890 * m will always be freed. 6891 */ 6892 static int 6893 key_api_flush(struct socket *so, struct mbuf *m, 6894 const struct sadb_msghdr *mhp) 6895 { 6896 struct sadb_msg *newmsg; 6897 struct secashead *sah; 6898 struct secasvar *sav, *nextsav; 6899 u_int16_t proto; 6900 u_int8_t state; 6901 6902 /* map satype to proto */ 6903 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6904 if (proto == 0) { 6905 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6906 return key_senderror(so, m, EINVAL); 6907 } 6908 6909 /* no SATYPE specified, i.e. flushing all SA. */ 6910 LIST_FOREACH(sah, &sahtree, chain) { 6911 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && 6912 proto != sah->saidx.proto) 6913 continue; 6914 6915 SASTATE_ALIVE_FOREACH(state) { 6916 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 6917 nextsav) { 6918 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6919 KEY_FREESAV(&sav); 6920 } 6921 } 6922 6923 sah->state = SADB_SASTATE_DEAD; 6924 } 6925 6926 if (m->m_len < sizeof(struct sadb_msg) || 6927 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6928 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6929 return key_senderror(so, m, ENOBUFS); 6930 } 6931 6932 if (m->m_next) 6933 m_freem(m->m_next); 6934 m->m_next = NULL; 6935 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6936 newmsg = mtod(m, struct sadb_msg *); 6937 newmsg->sadb_msg_errno = 0; 6938 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6939 6940 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6941 } 6942 6943 6944 static struct mbuf * 6945 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6946 { 6947 struct secashead *sah; 6948 struct secasvar *sav; 6949 u_int16_t proto; 6950 u_int8_t satype; 6951 u_int8_t state; 6952 int cnt; 6953 struct mbuf *m, *n, *prev; 6954 6955 *lenp = 0; 6956 6957 /* map satype to proto */ 6958 proto = key_satype2proto(req_satype); 6959 if (proto == 0) { 6960 *errorp = EINVAL; 6961 return (NULL); 6962 } 6963 6964 /* count sav entries to be sent to userland. */ 6965 cnt = 0; 6966 LIST_FOREACH(sah, &sahtree, chain) { 6967 if (req_satype != SADB_SATYPE_UNSPEC && 6968 proto != sah->saidx.proto) 6969 continue; 6970 6971 SASTATE_ANY_FOREACH(state) { 6972 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6973 cnt++; 6974 } 6975 } 6976 } 6977 6978 if (cnt == 0) { 6979 *errorp = ENOENT; 6980 return (NULL); 6981 } 6982 6983 /* send this to the userland, one at a time. */ 6984 m = NULL; 6985 prev = m; 6986 LIST_FOREACH(sah, &sahtree, chain) { 6987 if (req_satype != SADB_SATYPE_UNSPEC && 6988 proto != sah->saidx.proto) 6989 continue; 6990 6991 /* map proto to satype */ 6992 satype = key_proto2satype(sah->saidx.proto); 6993 if (satype == 0) { 6994 m_freem(m); 6995 *errorp = EINVAL; 6996 return (NULL); 6997 } 6998 6999 SASTATE_ANY_FOREACH(state) { 7000 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7001 n = key_setdumpsa(sav, SADB_DUMP, satype, 7002 --cnt, pid); 7003 if (!n) { 7004 m_freem(m); 7005 *errorp = ENOBUFS; 7006 return (NULL); 7007 } 7008 7009 if (!m) 7010 m = n; 7011 else 7012 prev->m_nextpkt = n; 7013 prev = n; 7014 } 7015 } 7016 } 7017 7018 if (!m) { 7019 *errorp = EINVAL; 7020 return (NULL); 7021 } 7022 7023 if ((m->m_flags & M_PKTHDR) != 0) { 7024 m->m_pkthdr.len = 0; 7025 for (n = m; n; n = n->m_next) 7026 m->m_pkthdr.len += n->m_len; 7027 } 7028 7029 *errorp = 0; 7030 return (m); 7031 } 7032 7033 /* 7034 * SADB_DUMP processing 7035 * dump all entries including status of DEAD in SAD. 7036 * receive 7037 * <base> 7038 * from the ikmpd, and dump all secasvar leaves 7039 * and send, 7040 * <base> ..... 7041 * to the ikmpd. 7042 * 7043 * m will always be freed. 7044 */ 7045 static int 7046 key_api_dump(struct socket *so, struct mbuf *m0, 7047 const struct sadb_msghdr *mhp) 7048 { 7049 u_int16_t proto; 7050 u_int8_t satype; 7051 struct mbuf *n; 7052 int s; 7053 int error, len, ok; 7054 7055 /* map satype to proto */ 7056 satype = mhp->msg->sadb_msg_satype; 7057 proto = key_satype2proto(satype); 7058 if (proto == 0) { 7059 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7060 return key_senderror(so, m0, EINVAL); 7061 } 7062 7063 /* 7064 * If the requestor has insufficient socket-buffer space 7065 * for the entire chain, nobody gets any response to the DUMP. 7066 * XXX For now, only the requestor ever gets anything. 7067 * Moreover, if the requestor has any space at all, they receive 7068 * the entire chain, otherwise the request is refused with ENOBUFS. 7069 */ 7070 if (sbspace(&so->so_rcv) <= 0) { 7071 return key_senderror(so, m0, ENOBUFS); 7072 } 7073 7074 s = splsoftnet(); 7075 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7076 splx(s); 7077 7078 if (n == NULL) { 7079 return key_senderror(so, m0, ENOENT); 7080 } 7081 { 7082 uint64_t *ps = PFKEY_STAT_GETREF(); 7083 ps[PFKEY_STAT_IN_TOTAL]++; 7084 ps[PFKEY_STAT_IN_BYTES] += len; 7085 PFKEY_STAT_PUTREF(); 7086 } 7087 7088 /* 7089 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7090 * The requestor receives either the entire chain, or an 7091 * error message with ENOBUFS. 7092 * 7093 * sbappendaddrchain() takes the chain of entries, one 7094 * packet-record per SPD entry, prepends the key_src sockaddr 7095 * to each packet-record, links the sockaddr mbufs into a new 7096 * list of records, then appends the entire resulting 7097 * list to the requesting socket. 7098 */ 7099 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 7100 SB_PRIO_ONESHOT_OVERFLOW); 7101 7102 if (!ok) { 7103 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7104 m_freem(n); 7105 return key_senderror(so, m0, ENOBUFS); 7106 } 7107 7108 m_freem(m0); 7109 return 0; 7110 } 7111 7112 /* 7113 * SADB_X_PROMISC processing 7114 * 7115 * m will always be freed. 7116 */ 7117 static int 7118 key_api_promisc(struct socket *so, struct mbuf *m, 7119 const struct sadb_msghdr *mhp) 7120 { 7121 int olen; 7122 7123 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7124 7125 if (olen < sizeof(struct sadb_msg)) { 7126 #if 1 7127 return key_senderror(so, m, EINVAL); 7128 #else 7129 m_freem(m); 7130 return 0; 7131 #endif 7132 } else if (olen == sizeof(struct sadb_msg)) { 7133 /* enable/disable promisc mode */ 7134 struct keycb *kp = (struct keycb *)sotorawcb(so); 7135 if (kp == NULL) 7136 return key_senderror(so, m, EINVAL); 7137 mhp->msg->sadb_msg_errno = 0; 7138 switch (mhp->msg->sadb_msg_satype) { 7139 case 0: 7140 case 1: 7141 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7142 break; 7143 default: 7144 return key_senderror(so, m, EINVAL); 7145 } 7146 7147 /* send the original message back to everyone */ 7148 mhp->msg->sadb_msg_errno = 0; 7149 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7150 } else { 7151 /* send packet as is */ 7152 7153 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7154 7155 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7156 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7157 } 7158 } 7159 7160 static int (*key_api_typesw[]) (struct socket *, struct mbuf *, 7161 const struct sadb_msghdr *) = { 7162 NULL, /* SADB_RESERVED */ 7163 key_api_getspi, /* SADB_GETSPI */ 7164 key_api_update, /* SADB_UPDATE */ 7165 key_api_add, /* SADB_ADD */ 7166 key_api_delete, /* SADB_DELETE */ 7167 key_api_get, /* SADB_GET */ 7168 key_api_acquire, /* SADB_ACQUIRE */ 7169 key_api_register, /* SADB_REGISTER */ 7170 NULL, /* SADB_EXPIRE */ 7171 key_api_flush, /* SADB_FLUSH */ 7172 key_api_dump, /* SADB_DUMP */ 7173 key_api_promisc, /* SADB_X_PROMISC */ 7174 NULL, /* SADB_X_PCHANGE */ 7175 key_api_spdadd, /* SADB_X_SPDUPDATE */ 7176 key_api_spdadd, /* SADB_X_SPDADD */ 7177 key_api_spddelete, /* SADB_X_SPDDELETE */ 7178 key_api_spdget, /* SADB_X_SPDGET */ 7179 NULL, /* SADB_X_SPDACQUIRE */ 7180 key_api_spddump, /* SADB_X_SPDDUMP */ 7181 key_api_spdflush, /* SADB_X_SPDFLUSH */ 7182 key_api_spdadd, /* SADB_X_SPDSETIDX */ 7183 NULL, /* SADB_X_SPDEXPIRE */ 7184 key_api_spddelete2, /* SADB_X_SPDDELETE2 */ 7185 key_api_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7186 }; 7187 7188 /* 7189 * parse sadb_msg buffer to process PFKEYv2, 7190 * and create a data to response if needed. 7191 * I think to be dealed with mbuf directly. 7192 * IN: 7193 * msgp : pointer to pointer to a received buffer pulluped. 7194 * This is rewrited to response. 7195 * so : pointer to socket. 7196 * OUT: 7197 * length for buffer to send to user process. 7198 */ 7199 int 7200 key_parse(struct mbuf *m, struct socket *so) 7201 { 7202 struct sadb_msg *msg; 7203 struct sadb_msghdr mh; 7204 u_int orglen; 7205 int error; 7206 7207 KASSERT(m != NULL); 7208 KASSERT(so != NULL); 7209 7210 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7211 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7212 IPSECLOG(LOG_DEBUG, "passed sadb_msg\n"); 7213 kdebug_sadb(msg); 7214 } 7215 #endif 7216 7217 if (m->m_len < sizeof(struct sadb_msg)) { 7218 m = m_pullup(m, sizeof(struct sadb_msg)); 7219 if (!m) 7220 return ENOBUFS; 7221 } 7222 msg = mtod(m, struct sadb_msg *); 7223 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7224 7225 if ((m->m_flags & M_PKTHDR) == 0 || 7226 m->m_pkthdr.len != orglen) { 7227 IPSECLOG(LOG_DEBUG, "invalid message length.\n"); 7228 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7229 error = EINVAL; 7230 goto senderror; 7231 } 7232 7233 if (msg->sadb_msg_version != PF_KEY_V2) { 7234 IPSECLOG(LOG_DEBUG, "PF_KEY version %u is mismatched.\n", 7235 msg->sadb_msg_version); 7236 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7237 error = EINVAL; 7238 goto senderror; 7239 } 7240 7241 if (msg->sadb_msg_type > SADB_MAX) { 7242 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7243 msg->sadb_msg_type); 7244 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7245 error = EINVAL; 7246 goto senderror; 7247 } 7248 7249 /* for old-fashioned code - should be nuked */ 7250 if (m->m_pkthdr.len > MCLBYTES) { 7251 m_freem(m); 7252 return ENOBUFS; 7253 } 7254 if (m->m_next) { 7255 struct mbuf *n; 7256 7257 MGETHDR(n, M_DONTWAIT, MT_DATA); 7258 if (n && m->m_pkthdr.len > MHLEN) { 7259 MCLGET(n, M_DONTWAIT); 7260 if ((n->m_flags & M_EXT) == 0) { 7261 m_free(n); 7262 n = NULL; 7263 } 7264 } 7265 if (!n) { 7266 m_freem(m); 7267 return ENOBUFS; 7268 } 7269 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7270 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7271 n->m_next = NULL; 7272 m_freem(m); 7273 m = n; 7274 } 7275 7276 /* align the mbuf chain so that extensions are in contiguous region. */ 7277 error = key_align(m, &mh); 7278 if (error) 7279 return error; 7280 7281 if (m->m_next) { /*XXX*/ 7282 m_freem(m); 7283 return ENOBUFS; 7284 } 7285 7286 msg = mh.msg; 7287 7288 /* check SA type */ 7289 switch (msg->sadb_msg_satype) { 7290 case SADB_SATYPE_UNSPEC: 7291 switch (msg->sadb_msg_type) { 7292 case SADB_GETSPI: 7293 case SADB_UPDATE: 7294 case SADB_ADD: 7295 case SADB_DELETE: 7296 case SADB_GET: 7297 case SADB_ACQUIRE: 7298 case SADB_EXPIRE: 7299 IPSECLOG(LOG_DEBUG, 7300 "must specify satype when msg type=%u.\n", 7301 msg->sadb_msg_type); 7302 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7303 error = EINVAL; 7304 goto senderror; 7305 } 7306 break; 7307 case SADB_SATYPE_AH: 7308 case SADB_SATYPE_ESP: 7309 case SADB_X_SATYPE_IPCOMP: 7310 case SADB_X_SATYPE_TCPSIGNATURE: 7311 switch (msg->sadb_msg_type) { 7312 case SADB_X_SPDADD: 7313 case SADB_X_SPDDELETE: 7314 case SADB_X_SPDGET: 7315 case SADB_X_SPDDUMP: 7316 case SADB_X_SPDFLUSH: 7317 case SADB_X_SPDSETIDX: 7318 case SADB_X_SPDUPDATE: 7319 case SADB_X_SPDDELETE2: 7320 IPSECLOG(LOG_DEBUG, "illegal satype=%u\n", 7321 msg->sadb_msg_type); 7322 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7323 error = EINVAL; 7324 goto senderror; 7325 } 7326 break; 7327 case SADB_SATYPE_RSVP: 7328 case SADB_SATYPE_OSPFV2: 7329 case SADB_SATYPE_RIPV2: 7330 case SADB_SATYPE_MIP: 7331 IPSECLOG(LOG_DEBUG, "type %u isn't supported.\n", 7332 msg->sadb_msg_satype); 7333 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7334 error = EOPNOTSUPP; 7335 goto senderror; 7336 case 1: /* XXX: What does it do? */ 7337 if (msg->sadb_msg_type == SADB_X_PROMISC) 7338 break; 7339 /*FALLTHROUGH*/ 7340 default: 7341 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7342 msg->sadb_msg_satype); 7343 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7344 error = EINVAL; 7345 goto senderror; 7346 } 7347 7348 /* check field of upper layer protocol and address family */ 7349 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL && 7350 mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7351 struct sadb_address *src0, *dst0; 7352 u_int plen; 7353 7354 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7355 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7356 7357 /* check upper layer protocol */ 7358 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7359 IPSECLOG(LOG_DEBUG, "upper layer protocol mismatched.\n"); 7360 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7361 error = EINVAL; 7362 goto senderror; 7363 } 7364 7365 /* check family */ 7366 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7367 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7368 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 7369 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7370 error = EINVAL; 7371 goto senderror; 7372 } 7373 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7374 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7375 IPSECLOG(LOG_DEBUG, 7376 "address struct size mismatched.\n"); 7377 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7378 error = EINVAL; 7379 goto senderror; 7380 } 7381 7382 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7383 case AF_INET: 7384 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7385 sizeof(struct sockaddr_in)) { 7386 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7387 error = EINVAL; 7388 goto senderror; 7389 } 7390 break; 7391 case AF_INET6: 7392 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7393 sizeof(struct sockaddr_in6)) { 7394 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7395 error = EINVAL; 7396 goto senderror; 7397 } 7398 break; 7399 default: 7400 IPSECLOG(LOG_DEBUG, "unsupported address family.\n"); 7401 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7402 error = EAFNOSUPPORT; 7403 goto senderror; 7404 } 7405 7406 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7407 case AF_INET: 7408 plen = sizeof(struct in_addr) << 3; 7409 break; 7410 case AF_INET6: 7411 plen = sizeof(struct in6_addr) << 3; 7412 break; 7413 default: 7414 plen = 0; /*fool gcc*/ 7415 break; 7416 } 7417 7418 /* check max prefix length */ 7419 if (src0->sadb_address_prefixlen > plen || 7420 dst0->sadb_address_prefixlen > plen) { 7421 IPSECLOG(LOG_DEBUG, "illegal prefixlen.\n"); 7422 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7423 error = EINVAL; 7424 goto senderror; 7425 } 7426 7427 /* 7428 * prefixlen == 0 is valid because there can be a case when 7429 * all addresses are matched. 7430 */ 7431 } 7432 7433 if (msg->sadb_msg_type >= __arraycount(key_api_typesw) || 7434 key_api_typesw[msg->sadb_msg_type] == NULL) { 7435 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7436 error = EINVAL; 7437 goto senderror; 7438 } 7439 7440 return (*key_api_typesw[msg->sadb_msg_type])(so, m, &mh); 7441 7442 senderror: 7443 return key_senderror(so, m, error); 7444 } 7445 7446 static int 7447 key_senderror(struct socket *so, struct mbuf *m, int code) 7448 { 7449 struct sadb_msg *msg; 7450 7451 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7452 7453 msg = mtod(m, struct sadb_msg *); 7454 msg->sadb_msg_errno = code; 7455 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7456 } 7457 7458 /* 7459 * set the pointer to each header into message buffer. 7460 * m will be freed on error. 7461 * XXX larger-than-MCLBYTES extension? 7462 */ 7463 static int 7464 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7465 { 7466 struct mbuf *n; 7467 struct sadb_ext *ext; 7468 size_t off, end; 7469 int extlen; 7470 int toff; 7471 7472 KASSERT(m != NULL); 7473 KASSERT(mhp != NULL); 7474 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7475 7476 /* initialize */ 7477 memset(mhp, 0, sizeof(*mhp)); 7478 7479 mhp->msg = mtod(m, struct sadb_msg *); 7480 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7481 7482 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7483 extlen = end; /*just in case extlen is not updated*/ 7484 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7485 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7486 if (!n) { 7487 /* m is already freed */ 7488 return ENOBUFS; 7489 } 7490 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7491 7492 /* set pointer */ 7493 switch (ext->sadb_ext_type) { 7494 case SADB_EXT_SA: 7495 case SADB_EXT_ADDRESS_SRC: 7496 case SADB_EXT_ADDRESS_DST: 7497 case SADB_EXT_ADDRESS_PROXY: 7498 case SADB_EXT_LIFETIME_CURRENT: 7499 case SADB_EXT_LIFETIME_HARD: 7500 case SADB_EXT_LIFETIME_SOFT: 7501 case SADB_EXT_KEY_AUTH: 7502 case SADB_EXT_KEY_ENCRYPT: 7503 case SADB_EXT_IDENTITY_SRC: 7504 case SADB_EXT_IDENTITY_DST: 7505 case SADB_EXT_SENSITIVITY: 7506 case SADB_EXT_PROPOSAL: 7507 case SADB_EXT_SUPPORTED_AUTH: 7508 case SADB_EXT_SUPPORTED_ENCRYPT: 7509 case SADB_EXT_SPIRANGE: 7510 case SADB_X_EXT_POLICY: 7511 case SADB_X_EXT_SA2: 7512 case SADB_X_EXT_NAT_T_TYPE: 7513 case SADB_X_EXT_NAT_T_SPORT: 7514 case SADB_X_EXT_NAT_T_DPORT: 7515 case SADB_X_EXT_NAT_T_OAI: 7516 case SADB_X_EXT_NAT_T_OAR: 7517 case SADB_X_EXT_NAT_T_FRAG: 7518 /* duplicate check */ 7519 /* 7520 * XXX Are there duplication payloads of either 7521 * KEY_AUTH or KEY_ENCRYPT ? 7522 */ 7523 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7524 IPSECLOG(LOG_DEBUG, 7525 "duplicate ext_type %u is passed.\n", 7526 ext->sadb_ext_type); 7527 m_freem(m); 7528 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7529 return EINVAL; 7530 } 7531 break; 7532 default: 7533 IPSECLOG(LOG_DEBUG, "invalid ext_type %u is passed.\n", 7534 ext->sadb_ext_type); 7535 m_freem(m); 7536 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7537 return EINVAL; 7538 } 7539 7540 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7541 7542 if (key_validate_ext(ext, extlen)) { 7543 m_freem(m); 7544 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7545 return EINVAL; 7546 } 7547 7548 n = m_pulldown(m, off, extlen, &toff); 7549 if (!n) { 7550 /* m is already freed */ 7551 return ENOBUFS; 7552 } 7553 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7554 7555 mhp->ext[ext->sadb_ext_type] = ext; 7556 mhp->extoff[ext->sadb_ext_type] = off; 7557 mhp->extlen[ext->sadb_ext_type] = extlen; 7558 } 7559 7560 if (off != end) { 7561 m_freem(m); 7562 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7563 return EINVAL; 7564 } 7565 7566 return 0; 7567 } 7568 7569 static int 7570 key_validate_ext(const struct sadb_ext *ext, int len) 7571 { 7572 const struct sockaddr *sa; 7573 enum { NONE, ADDR } checktype = NONE; 7574 int baselen = 0; 7575 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7576 7577 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7578 return EINVAL; 7579 7580 /* if it does not match minimum/maximum length, bail */ 7581 if (ext->sadb_ext_type >= __arraycount(minsize) || 7582 ext->sadb_ext_type >= __arraycount(maxsize)) 7583 return EINVAL; 7584 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7585 return EINVAL; 7586 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7587 return EINVAL; 7588 7589 /* more checks based on sadb_ext_type XXX need more */ 7590 switch (ext->sadb_ext_type) { 7591 case SADB_EXT_ADDRESS_SRC: 7592 case SADB_EXT_ADDRESS_DST: 7593 case SADB_EXT_ADDRESS_PROXY: 7594 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7595 checktype = ADDR; 7596 break; 7597 case SADB_EXT_IDENTITY_SRC: 7598 case SADB_EXT_IDENTITY_DST: 7599 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7600 SADB_X_IDENTTYPE_ADDR) { 7601 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7602 checktype = ADDR; 7603 } else 7604 checktype = NONE; 7605 break; 7606 default: 7607 checktype = NONE; 7608 break; 7609 } 7610 7611 switch (checktype) { 7612 case NONE: 7613 break; 7614 case ADDR: 7615 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7616 if (len < baselen + sal) 7617 return EINVAL; 7618 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7619 return EINVAL; 7620 break; 7621 } 7622 7623 return 0; 7624 } 7625 7626 static int 7627 key_do_init(void) 7628 { 7629 int i, error; 7630 7631 mutex_init(&key_mtx, MUTEX_DEFAULT, IPL_NONE); 7632 7633 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7634 7635 callout_init(&key_timehandler_ch, 0); 7636 error = workqueue_create(&key_timehandler_wq, "key_timehandler", 7637 key_timehandler_work, NULL, PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 7638 if (error != 0) 7639 panic("%s: workqueue_create failed (%d)\n", __func__, error); 7640 7641 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7642 LIST_INIT(&sptree[i]); 7643 } 7644 7645 LIST_INIT(&sahtree); 7646 7647 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7648 LIST_INIT(®tree[i]); 7649 } 7650 7651 #ifndef IPSEC_NONBLOCK_ACQUIRE 7652 LIST_INIT(&acqtree); 7653 #endif 7654 #ifdef notyet 7655 LIST_INIT(&spacqtree); 7656 #endif 7657 7658 /* system default */ 7659 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7660 ip4_def_policy.refcnt++; /*never reclaim this*/ 7661 7662 #ifdef INET6 7663 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7664 ip6_def_policy.refcnt++; /*never reclaim this*/ 7665 #endif 7666 7667 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7668 7669 /* initialize key statistics */ 7670 keystat.getspi_count = 1; 7671 7672 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7673 7674 return (0); 7675 } 7676 7677 void 7678 key_init(void) 7679 { 7680 static ONCE_DECL(key_init_once); 7681 7682 sysctl_net_keyv2_setup(NULL); 7683 sysctl_net_key_compat_setup(NULL); 7684 7685 RUN_ONCE(&key_init_once, key_do_init); 7686 } 7687 7688 /* 7689 * XXX: maybe This function is called after INBOUND IPsec processing. 7690 * 7691 * Special check for tunnel-mode packets. 7692 * We must make some checks for consistency between inner and outer IP header. 7693 * 7694 * xxx more checks to be provided 7695 */ 7696 int 7697 key_checktunnelsanity( 7698 struct secasvar *sav, 7699 u_int family, 7700 void *src, 7701 void *dst 7702 ) 7703 { 7704 7705 KASSERT(sav->sah != NULL); 7706 7707 /* XXX: check inner IP header */ 7708 7709 return 1; 7710 } 7711 7712 #if 0 7713 #define hostnamelen strlen(hostname) 7714 7715 /* 7716 * Get FQDN for the host. 7717 * If the administrator configured hostname (by hostname(1)) without 7718 * domain name, returns nothing. 7719 */ 7720 static const char * 7721 key_getfqdn(void) 7722 { 7723 int i; 7724 int hasdot; 7725 static char fqdn[MAXHOSTNAMELEN + 1]; 7726 7727 if (!hostnamelen) 7728 return NULL; 7729 7730 /* check if it comes with domain name. */ 7731 hasdot = 0; 7732 for (i = 0; i < hostnamelen; i++) { 7733 if (hostname[i] == '.') 7734 hasdot++; 7735 } 7736 if (!hasdot) 7737 return NULL; 7738 7739 /* NOTE: hostname may not be NUL-terminated. */ 7740 memset(fqdn, 0, sizeof(fqdn)); 7741 memcpy(fqdn, hostname, hostnamelen); 7742 fqdn[hostnamelen] = '\0'; 7743 return fqdn; 7744 } 7745 7746 /* 7747 * get username@FQDN for the host/user. 7748 */ 7749 static const char * 7750 key_getuserfqdn(void) 7751 { 7752 const char *host; 7753 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7754 struct proc *p = curproc; 7755 char *q; 7756 7757 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7758 return NULL; 7759 if (!(host = key_getfqdn())) 7760 return NULL; 7761 7762 /* NOTE: s_login may not be-NUL terminated. */ 7763 memset(userfqdn, 0, sizeof(userfqdn)); 7764 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7765 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7766 q = userfqdn + strlen(userfqdn); 7767 *q++ = '@'; 7768 memcpy(q, host, strlen(host)); 7769 q += strlen(host); 7770 *q++ = '\0'; 7771 7772 return userfqdn; 7773 } 7774 #endif 7775 7776 /* record data transfer on SA, and update timestamps */ 7777 void 7778 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7779 { 7780 7781 KASSERT(sav != NULL); 7782 KASSERT(m != NULL); 7783 if (!sav->lft_c) 7784 return; 7785 7786 /* 7787 * XXX Currently, there is a difference of bytes size 7788 * between inbound and outbound processing. 7789 */ 7790 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7791 /* to check bytes lifetime is done in key_timehandler(). */ 7792 7793 /* 7794 * We use the number of packets as the unit of 7795 * sadb_lifetime_allocations. We increment the variable 7796 * whenever {esp,ah}_{in,out}put is called. 7797 */ 7798 sav->lft_c->sadb_lifetime_allocations++; 7799 /* XXX check for expires? */ 7800 7801 /* 7802 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7803 * in seconds. HARD and SOFT lifetime are measured by the time 7804 * difference (again in seconds) from sadb_lifetime_usetime. 7805 * 7806 * usetime 7807 * v expire expire 7808 * -----+-----+--------+---> t 7809 * <--------------> HARD 7810 * <-----> SOFT 7811 */ 7812 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7813 /* XXX check for expires? */ 7814 7815 return; 7816 } 7817 7818 /* dumb version */ 7819 void 7820 key_sa_routechange(struct sockaddr *dst) 7821 { 7822 struct secashead *sah; 7823 struct route *ro; 7824 const struct sockaddr *sa; 7825 7826 LIST_FOREACH(sah, &sahtree, chain) { 7827 ro = &sah->sa_route; 7828 sa = rtcache_getdst(ro); 7829 if (sa != NULL && dst->sa_len == sa->sa_len && 7830 memcmp(dst, sa, dst->sa_len) == 0) 7831 rtcache_free(ro); 7832 } 7833 7834 return; 7835 } 7836 7837 static void 7838 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7839 { 7840 7841 KASSERT(sav != NULL); 7842 7843 if (sav->state == state) 7844 return; 7845 7846 KASSERT(__LIST_CHAINED(sav)); 7847 LIST_REMOVE(sav, chain); 7848 7849 sav->state = state; 7850 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7851 } 7852 7853 /* XXX too much? */ 7854 static struct mbuf * 7855 key_alloc_mbuf(int l) 7856 { 7857 struct mbuf *m = NULL, *n; 7858 int len, t; 7859 7860 len = l; 7861 while (len > 0) { 7862 MGET(n, M_DONTWAIT, MT_DATA); 7863 if (n && len > MLEN) 7864 MCLGET(n, M_DONTWAIT); 7865 if (!n) { 7866 m_freem(m); 7867 return NULL; 7868 } 7869 7870 n->m_next = NULL; 7871 n->m_len = 0; 7872 n->m_len = M_TRAILINGSPACE(n); 7873 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7874 if (n->m_len > len) { 7875 t = (n->m_len - len) & ~(sizeof(long) - 1); 7876 n->m_data += t; 7877 n->m_len = len; 7878 } 7879 7880 len -= n->m_len; 7881 7882 if (m) 7883 m_cat(m, n); 7884 else 7885 m = n; 7886 } 7887 7888 return m; 7889 } 7890 7891 static struct mbuf * 7892 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7893 { 7894 struct secashead *sah; 7895 struct secasvar *sav; 7896 u_int16_t proto; 7897 u_int8_t satype; 7898 u_int8_t state; 7899 int cnt; 7900 struct mbuf *m, *n; 7901 7902 /* map satype to proto */ 7903 proto = key_satype2proto(req_satype); 7904 if (proto == 0) { 7905 *errorp = EINVAL; 7906 return (NULL); 7907 } 7908 7909 /* count sav entries to be sent to the userland. */ 7910 cnt = 0; 7911 LIST_FOREACH(sah, &sahtree, chain) { 7912 if (req_satype != SADB_SATYPE_UNSPEC && 7913 proto != sah->saidx.proto) 7914 continue; 7915 7916 SASTATE_ANY_FOREACH(state) { 7917 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7918 cnt++; 7919 } 7920 } 7921 } 7922 7923 if (cnt == 0) { 7924 *errorp = ENOENT; 7925 return (NULL); 7926 } 7927 7928 /* send this to the userland, one at a time. */ 7929 m = NULL; 7930 LIST_FOREACH(sah, &sahtree, chain) { 7931 if (req_satype != SADB_SATYPE_UNSPEC && 7932 proto != sah->saidx.proto) 7933 continue; 7934 7935 /* map proto to satype */ 7936 satype = key_proto2satype(sah->saidx.proto); 7937 if (satype == 0) { 7938 m_freem(m); 7939 *errorp = EINVAL; 7940 return (NULL); 7941 } 7942 7943 SASTATE_ANY_FOREACH(state) { 7944 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7945 n = key_setdumpsa(sav, SADB_DUMP, satype, 7946 --cnt, pid); 7947 if (!n) { 7948 m_freem(m); 7949 *errorp = ENOBUFS; 7950 return (NULL); 7951 } 7952 7953 if (!m) 7954 m = n; 7955 else 7956 m_cat(m, n); 7957 } 7958 } 7959 } 7960 7961 if (!m) { 7962 *errorp = EINVAL; 7963 return (NULL); 7964 } 7965 7966 if ((m->m_flags & M_PKTHDR) != 0) { 7967 m->m_pkthdr.len = 0; 7968 for (n = m; n; n = n->m_next) 7969 m->m_pkthdr.len += n->m_len; 7970 } 7971 7972 *errorp = 0; 7973 return (m); 7974 } 7975 7976 static struct mbuf * 7977 key_setspddump(int *errorp, pid_t pid) 7978 { 7979 struct secpolicy *sp; 7980 int cnt; 7981 u_int dir; 7982 struct mbuf *m, *n; 7983 7984 /* search SPD entry and get buffer size. */ 7985 cnt = 0; 7986 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7987 LIST_FOREACH(sp, &sptree[dir], chain) { 7988 cnt++; 7989 } 7990 } 7991 7992 if (cnt == 0) { 7993 *errorp = ENOENT; 7994 return (NULL); 7995 } 7996 7997 m = NULL; 7998 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7999 LIST_FOREACH(sp, &sptree[dir], chain) { 8000 --cnt; 8001 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8002 8003 if (!n) { 8004 *errorp = ENOBUFS; 8005 m_freem(m); 8006 return (NULL); 8007 } 8008 if (!m) 8009 m = n; 8010 else { 8011 m->m_pkthdr.len += n->m_pkthdr.len; 8012 m_cat(m, n); 8013 } 8014 } 8015 } 8016 8017 *errorp = 0; 8018 return (m); 8019 } 8020 8021 int 8022 key_get_used(void) { 8023 return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || 8024 !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); 8025 } 8026 8027 void 8028 key_update_used(void) 8029 { 8030 switch (ipsec_enabled) { 8031 default: 8032 case 0: 8033 #ifdef notyet 8034 /* XXX: racy */ 8035 ipsec_used = 0; 8036 #endif 8037 break; 8038 case 1: 8039 #ifndef notyet 8040 /* XXX: racy */ 8041 if (!ipsec_used) 8042 #endif 8043 ipsec_used = key_get_used(); 8044 break; 8045 case 2: 8046 ipsec_used = 1; 8047 break; 8048 } 8049 } 8050 8051 static int 8052 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8053 { 8054 struct mbuf *m, *n; 8055 int err2 = 0; 8056 char *p, *ep; 8057 size_t len; 8058 int s, error; 8059 8060 if (newp) 8061 return (EPERM); 8062 if (namelen != 1) 8063 return (EINVAL); 8064 8065 s = splsoftnet(); 8066 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8067 splx(s); 8068 if (!m) 8069 return (error); 8070 if (!oldp) 8071 *oldlenp = m->m_pkthdr.len; 8072 else { 8073 p = oldp; 8074 if (*oldlenp < m->m_pkthdr.len) { 8075 err2 = ENOMEM; 8076 ep = p + *oldlenp; 8077 } else { 8078 *oldlenp = m->m_pkthdr.len; 8079 ep = p + m->m_pkthdr.len; 8080 } 8081 for (n = m; n; n = n->m_next) { 8082 len = (ep - p < n->m_len) ? 8083 ep - p : n->m_len; 8084 error = copyout(mtod(n, const void *), p, len); 8085 p += len; 8086 if (error) 8087 break; 8088 } 8089 if (error == 0) 8090 error = err2; 8091 } 8092 m_freem(m); 8093 8094 return (error); 8095 } 8096 8097 static int 8098 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8099 { 8100 struct mbuf *m, *n; 8101 int err2 = 0; 8102 char *p, *ep; 8103 size_t len; 8104 int s, error; 8105 8106 if (newp) 8107 return (EPERM); 8108 if (namelen != 0) 8109 return (EINVAL); 8110 8111 s = splsoftnet(); 8112 m = key_setspddump(&error, l->l_proc->p_pid); 8113 splx(s); 8114 if (!m) 8115 return (error); 8116 if (!oldp) 8117 *oldlenp = m->m_pkthdr.len; 8118 else { 8119 p = oldp; 8120 if (*oldlenp < m->m_pkthdr.len) { 8121 err2 = ENOMEM; 8122 ep = p + *oldlenp; 8123 } else { 8124 *oldlenp = m->m_pkthdr.len; 8125 ep = p + m->m_pkthdr.len; 8126 } 8127 for (n = m; n; n = n->m_next) { 8128 len = (ep - p < n->m_len) ? ep - p : n->m_len; 8129 error = copyout(mtod(n, const void *), p, len); 8130 p += len; 8131 if (error) 8132 break; 8133 } 8134 if (error == 0) 8135 error = err2; 8136 } 8137 m_freem(m); 8138 8139 return (error); 8140 } 8141 8142 /* 8143 * Create sysctl tree for native IPSEC key knobs, originally 8144 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8145 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8146 * and in any case the part of our sysctl namespace used for dumping the 8147 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8148 * namespace, for API reasons. 8149 * 8150 * Pending a consensus on the right way to fix this, add a level of 8151 * indirection in how we number the `native' IPSEC key nodes; 8152 * and (as requested by Andrew Brown) move registration of the 8153 * KAME-compatible names to a separate function. 8154 */ 8155 #if 0 8156 # define IPSEC_PFKEY PF_KEY_V2 8157 # define IPSEC_PFKEY_NAME "keyv2" 8158 #else 8159 # define IPSEC_PFKEY PF_KEY 8160 # define IPSEC_PFKEY_NAME "key" 8161 #endif 8162 8163 static int 8164 sysctl_net_key_stats(SYSCTLFN_ARGS) 8165 { 8166 8167 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8168 } 8169 8170 static void 8171 sysctl_net_keyv2_setup(struct sysctllog **clog) 8172 { 8173 8174 sysctl_createv(clog, 0, NULL, NULL, 8175 CTLFLAG_PERMANENT, 8176 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8177 NULL, 0, NULL, 0, 8178 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8179 8180 sysctl_createv(clog, 0, NULL, NULL, 8181 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8182 CTLTYPE_INT, "debug", NULL, 8183 NULL, 0, &key_debug_level, 0, 8184 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8185 sysctl_createv(clog, 0, NULL, NULL, 8186 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8187 CTLTYPE_INT, "spi_try", NULL, 8188 NULL, 0, &key_spi_trycnt, 0, 8189 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8190 sysctl_createv(clog, 0, NULL, NULL, 8191 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8192 CTLTYPE_INT, "spi_min_value", NULL, 8193 NULL, 0, &key_spi_minval, 0, 8194 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8195 sysctl_createv(clog, 0, NULL, NULL, 8196 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8197 CTLTYPE_INT, "spi_max_value", NULL, 8198 NULL, 0, &key_spi_maxval, 0, 8199 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8200 sysctl_createv(clog, 0, NULL, NULL, 8201 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8202 CTLTYPE_INT, "random_int", NULL, 8203 NULL, 0, &key_int_random, 0, 8204 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8205 sysctl_createv(clog, 0, NULL, NULL, 8206 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8207 CTLTYPE_INT, "larval_lifetime", NULL, 8208 NULL, 0, &key_larval_lifetime, 0, 8209 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8210 sysctl_createv(clog, 0, NULL, NULL, 8211 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8212 CTLTYPE_INT, "blockacq_count", NULL, 8213 NULL, 0, &key_blockacq_count, 0, 8214 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8215 sysctl_createv(clog, 0, NULL, NULL, 8216 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8217 CTLTYPE_INT, "blockacq_lifetime", NULL, 8218 NULL, 0, &key_blockacq_lifetime, 0, 8219 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8220 sysctl_createv(clog, 0, NULL, NULL, 8221 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8222 CTLTYPE_INT, "esp_keymin", NULL, 8223 NULL, 0, &ipsec_esp_keymin, 0, 8224 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8225 sysctl_createv(clog, 0, NULL, NULL, 8226 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8227 CTLTYPE_INT, "prefered_oldsa", NULL, 8228 NULL, 0, &key_prefered_oldsa, 0, 8229 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8230 sysctl_createv(clog, 0, NULL, NULL, 8231 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8232 CTLTYPE_INT, "esp_auth", NULL, 8233 NULL, 0, &ipsec_esp_auth, 0, 8234 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8235 sysctl_createv(clog, 0, NULL, NULL, 8236 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8237 CTLTYPE_INT, "ah_keymin", NULL, 8238 NULL, 0, &ipsec_ah_keymin, 0, 8239 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8240 sysctl_createv(clog, 0, NULL, NULL, 8241 CTLFLAG_PERMANENT, 8242 CTLTYPE_STRUCT, "stats", 8243 SYSCTL_DESCR("PF_KEY statistics"), 8244 sysctl_net_key_stats, 0, NULL, 0, 8245 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8246 } 8247 8248 /* 8249 * Register sysctl names used by setkey(8). For historical reasons, 8250 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8251 * for both IPSEC and KAME IPSEC. 8252 */ 8253 static void 8254 sysctl_net_key_compat_setup(struct sysctllog **clog) 8255 { 8256 8257 sysctl_createv(clog, 0, NULL, NULL, 8258 CTLFLAG_PERMANENT, 8259 CTLTYPE_NODE, "key", NULL, 8260 NULL, 0, NULL, 0, 8261 CTL_NET, PF_KEY, CTL_EOL); 8262 8263 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8264 sysctl_createv(clog, 0, NULL, NULL, 8265 CTLFLAG_PERMANENT, 8266 CTLTYPE_STRUCT, "dumpsa", NULL, 8267 sysctl_net_key_dumpsa, 0, NULL, 0, 8268 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8269 sysctl_createv(clog, 0, NULL, NULL, 8270 CTLFLAG_PERMANENT, 8271 CTLTYPE_STRUCT, "dumpsp", NULL, 8272 sysctl_net_key_dumpsp, 0, NULL, 0, 8273 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8274 } 8275
Indexes created Tue Sep 23 14:10:03 GMT 2025