key.c revision 1.178
1 /* $NetBSD: key.c,v 1.178 2017/07/12 03:59:32 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 1.178 2017/07/12 03:59:32 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 *, int *, const char*, int); 426 #define KEY_NEWSAV(m, sadb, e) \ 427 key_newsav(m, sadb, e, __func__, __LINE__) 428 static void key_delsav (struct secasvar *); 429 static struct secashead *key_getsah(const struct secasindex *, int); 430 static bool key_checkspidup(const struct secasindex *, u_int32_t); 431 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 432 static int key_setsaval (struct secasvar *, struct mbuf *, 433 const struct sadb_msghdr *); 434 static void key_freesaval(struct secasvar *); 435 static int key_init_xform(struct secasvar *); 436 static void key_clear_xform(struct secasvar *); 437 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 438 u_int8_t, u_int32_t, u_int32_t); 439 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 440 static struct mbuf *key_setsadbxtype (u_int16_t); 441 static struct mbuf *key_setsadbxfrag (u_int16_t); 442 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 443 static int key_checksalen (const union sockaddr_union *); 444 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 445 u_int32_t, pid_t, u_int16_t); 446 static struct mbuf *key_setsadbsa (struct secasvar *); 447 static struct mbuf *key_setsadbaddr (u_int16_t, 448 const struct sockaddr *, u_int8_t, u_int16_t); 449 #if 0 450 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 451 int, u_int64_t); 452 #endif 453 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 454 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 455 u_int32_t); 456 static void *key_newbuf (const void *, u_int); 457 #ifdef INET6 458 static int key_ismyaddr6 (const struct sockaddr_in6 *); 459 #endif 460 461 static void sysctl_net_keyv2_setup(struct sysctllog **); 462 static void sysctl_net_key_compat_setup(struct sysctllog **); 463 464 /* flags for key_saidx_match() */ 465 #define CMP_HEAD 1 /* protocol, addresses. */ 466 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 467 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 468 #define CMP_EXACTLY 4 /* all elements. */ 469 static int key_saidx_match(const struct secasindex *, 470 const struct secasindex *, int); 471 472 static int key_sockaddr_match(const struct sockaddr *, 473 const struct sockaddr *, int); 474 static int key_bb_match_withmask(const void *, const void *, u_int); 475 static u_int16_t key_satype2proto (u_int8_t); 476 static u_int8_t key_proto2satype (u_int16_t); 477 478 static int key_spidx_match_exactly(const struct secpolicyindex *, 479 const struct secpolicyindex *); 480 static int key_spidx_match_withmask(const struct secpolicyindex *, 481 const struct secpolicyindex *); 482 483 static int key_api_getspi(struct socket *, struct mbuf *, 484 const struct sadb_msghdr *); 485 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 486 const struct secasindex *); 487 static int key_handle_natt_info (struct secasvar *, 488 const struct sadb_msghdr *); 489 static int key_set_natt_ports (union sockaddr_union *, 490 union sockaddr_union *, 491 const struct sadb_msghdr *); 492 static int key_api_update(struct socket *, struct mbuf *, 493 const struct sadb_msghdr *); 494 #ifdef IPSEC_DOSEQCHECK 495 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 496 #endif 497 static int key_api_add(struct socket *, struct mbuf *, 498 const struct sadb_msghdr *); 499 static int key_setident (struct secashead *, struct mbuf *, 500 const struct sadb_msghdr *); 501 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 502 const struct sadb_msghdr *); 503 static int key_api_delete(struct socket *, struct mbuf *, 504 const struct sadb_msghdr *); 505 static int key_api_get(struct socket *, struct mbuf *, 506 const struct sadb_msghdr *); 507 508 static void key_getcomb_setlifetime (struct sadb_comb *); 509 static struct mbuf *key_getcomb_esp (void); 510 static struct mbuf *key_getcomb_ah (void); 511 static struct mbuf *key_getcomb_ipcomp (void); 512 static struct mbuf *key_getprop (const struct secasindex *); 513 514 static int key_acquire (const struct secasindex *, struct secpolicy *); 515 #ifndef IPSEC_NONBLOCK_ACQUIRE 516 static struct secacq *key_newacq (const struct secasindex *); 517 static struct secacq *key_getacq (const struct secasindex *); 518 static struct secacq *key_getacqbyseq (u_int32_t); 519 #endif 520 #ifdef notyet 521 static struct secspacq *key_newspacq (const struct secpolicyindex *); 522 static struct secspacq *key_getspacq (const struct secpolicyindex *); 523 #endif 524 static int key_api_acquire(struct socket *, struct mbuf *, 525 const struct sadb_msghdr *); 526 static int key_api_register(struct socket *, struct mbuf *, 527 const struct sadb_msghdr *); 528 static int key_expire (struct secasvar *); 529 static int key_api_flush(struct socket *, struct mbuf *, 530 const struct sadb_msghdr *); 531 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 532 int *lenp, pid_t pid); 533 static int key_api_dump(struct socket *, struct mbuf *, 534 const struct sadb_msghdr *); 535 static int key_api_promisc(struct socket *, struct mbuf *, 536 const struct sadb_msghdr *); 537 static int key_senderror (struct socket *, struct mbuf *, int); 538 static int key_validate_ext (const struct sadb_ext *, int); 539 static int key_align (struct mbuf *, struct sadb_msghdr *); 540 #if 0 541 static const char *key_getfqdn (void); 542 static const char *key_getuserfqdn (void); 543 #endif 544 static void key_sa_chgstate (struct secasvar *, u_int8_t); 545 static inline void key_sp_dead (struct secpolicy *); 546 static void key_sp_unlink (struct secpolicy *sp); 547 548 static struct mbuf *key_alloc_mbuf (int); 549 550 static void key_timehandler(void *); 551 static void key_timehandler_work(struct work *, void *); 552 static struct callout key_timehandler_ch; 553 static struct workqueue *key_timehandler_wq; 554 static struct work key_timehandler_wk; 555 556 #ifdef IPSEC_REF_DEBUG 557 #define REFLOG(label, p, where, tag) \ 558 log(LOG_DEBUG, "%s:%d: " label " : refcnt=%d (%p)\n.", \ 559 (where), (tag), (p)->refcnt, (p)) 560 #else 561 #define REFLOG(label, p, where, tag) do {} while (0) 562 #endif 563 564 #define SA_ADDREF(p) do { \ 565 atomic_inc_uint(&(p)->refcnt); \ 566 REFLOG("SA_ADDREF", (p), __func__, __LINE__); \ 567 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 568 } while (0) 569 #define SA_ADDREF2(p, where, tag) do { \ 570 atomic_inc_uint(&(p)->refcnt); \ 571 REFLOG("SA_ADDREF", (p), (where), (tag)); \ 572 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 573 } while (0) 574 #define SA_DELREF(p) do { \ 575 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 576 atomic_dec_uint(&(p)->refcnt); \ 577 REFLOG("SA_DELREF", (p), __func__, __LINE__); \ 578 } while (0) 579 #define SA_DELREF2(p, nv, where, tag) do { \ 580 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 581 nv = atomic_dec_uint_nv(&(p)->refcnt); \ 582 REFLOG("SA_DELREF", (p), (where), (tag)); \ 583 } while (0) 584 585 #define SP_ADDREF(p) do { \ 586 atomic_inc_uint(&(p)->refcnt); \ 587 REFLOG("SP_ADDREF", (p), __func__, __LINE__); \ 588 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 589 } while (0) 590 #define SP_ADDREF2(p, where, tag) do { \ 591 atomic_inc_uint(&(p)->refcnt); \ 592 REFLOG("SP_ADDREF", (p), (where), (tag)); \ 593 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 594 } while (0) 595 #define SP_DELREF(p) do { \ 596 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 597 atomic_dec_uint(&(p)->refcnt); \ 598 REFLOG("SP_DELREF", (p), __func__, __LINE__); \ 599 } while (0) 600 #define SP_DELREF2(p, nv, where, tag) do { \ 601 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 602 nv = atomic_dec_uint_nv(&(p)->refcnt); \ 603 REFLOG("SP_DELREF", (p), (where), (tag)); \ 604 } while (0) 605 606 607 static inline void 608 key_sp_dead(struct secpolicy *sp) 609 { 610 611 /* mark the SP dead */ 612 sp->state = IPSEC_SPSTATE_DEAD; 613 } 614 615 static void 616 key_sp_unlink(struct secpolicy *sp) 617 { 618 619 /* remove from SP index */ 620 KASSERT(__LIST_CHAINED(sp)); 621 LIST_REMOVE(sp, chain); 622 /* Release refcount held just for being on chain */ 623 KEY_FREESP(&sp); 624 } 625 626 627 /* 628 * Return 0 when there are known to be no SP's for the specified 629 * direction. Otherwise return 1. This is used by IPsec code 630 * to optimize performance. 631 */ 632 int 633 key_havesp(u_int dir) 634 { 635 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 636 !LIST_EMPTY(&sptree[dir]) : 1); 637 } 638 639 /* %%% IPsec policy management */ 640 /* 641 * allocating a SP for OUTBOUND or INBOUND packet. 642 * Must call key_freesp() later. 643 * OUT: NULL: not found 644 * others: found and return the pointer. 645 */ 646 struct secpolicy * 647 key_lookup_sp_byspidx(const struct secpolicyindex *spidx, 648 u_int dir, const char* where, int tag) 649 { 650 struct secpolicy *sp; 651 int s; 652 653 KASSERT(spidx != NULL); 654 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 655 656 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 657 658 /* get a SP entry */ 659 s = splsoftnet(); /*called from softclock()*/ 660 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 661 printf("*** objects\n"); 662 kdebug_secpolicyindex(spidx); 663 } 664 665 LIST_FOREACH(sp, &sptree[dir], chain) { 666 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 667 printf("*** in SPD\n"); 668 kdebug_secpolicyindex(&sp->spidx); 669 } 670 671 if (sp->state == IPSEC_SPSTATE_DEAD) 672 continue; 673 if (key_spidx_match_withmask(&sp->spidx, spidx)) 674 goto found; 675 } 676 sp = NULL; 677 found: 678 if (sp) { 679 /* sanity check */ 680 KEY_CHKSPDIR(sp->spidx.dir, dir); 681 682 /* found a SPD entry */ 683 sp->lastused = time_uptime; 684 SP_ADDREF2(sp, where, tag); 685 } 686 splx(s); 687 688 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 689 "DP return SP:%p (ID=%u) refcnt %u\n", 690 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 691 return sp; 692 } 693 694 /* 695 * allocating a SP for OUTBOUND or INBOUND packet. 696 * Must call key_freesp() later. 697 * OUT: NULL: not found 698 * others: found and return the pointer. 699 */ 700 struct secpolicy * 701 key_lookup_sp(u_int32_t spi, 702 const union sockaddr_union *dst, 703 u_int8_t proto, 704 u_int dir, 705 const char* where, int tag) 706 { 707 struct secpolicy *sp; 708 int s; 709 710 KASSERT(dst != NULL); 711 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 712 713 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 714 715 /* get a SP entry */ 716 s = splsoftnet(); /*called from softclock()*/ 717 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 718 printf("*** objects\n"); 719 printf("spi %u proto %u dir %u\n", spi, proto, dir); 720 kdebug_sockaddr(&dst->sa); 721 } 722 723 LIST_FOREACH(sp, &sptree[dir], chain) { 724 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 725 printf("*** in SPD\n"); 726 kdebug_secpolicyindex(&sp->spidx); 727 } 728 729 if (sp->state == IPSEC_SPSTATE_DEAD) 730 continue; 731 /* compare simple values, then dst address */ 732 if (sp->spidx.ul_proto != proto) 733 continue; 734 /* NB: spi's must exist and match */ 735 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 736 continue; 737 if (key_sockaddr_match(&sp->spidx.dst.sa, &dst->sa, PORT_STRICT)) 738 goto found; 739 } 740 sp = NULL; 741 found: 742 if (sp) { 743 /* sanity check */ 744 KEY_CHKSPDIR(sp->spidx.dir, dir); 745 746 /* found a SPD entry */ 747 sp->lastused = time_uptime; 748 SP_ADDREF2(sp, where, tag); 749 } 750 splx(s); 751 752 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 753 "DP return SP:%p (ID=%u) refcnt %u\n", 754 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 755 return sp; 756 } 757 758 /* 759 * return a policy that matches this particular inbound packet. 760 * XXX slow 761 */ 762 struct secpolicy * 763 key_gettunnel(const struct sockaddr *osrc, 764 const struct sockaddr *odst, 765 const struct sockaddr *isrc, 766 const struct sockaddr *idst, 767 const char* where, int tag) 768 { 769 struct secpolicy *sp; 770 const int dir = IPSEC_DIR_INBOUND; 771 int s; 772 struct ipsecrequest *r1, *r2, *p; 773 struct secpolicyindex spidx; 774 775 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 776 777 if (isrc->sa_family != idst->sa_family) { 778 IPSECLOG(LOG_ERR, "protocol family mismatched %d != %d\n.", 779 isrc->sa_family, idst->sa_family); 780 sp = NULL; 781 goto done; 782 } 783 784 s = splsoftnet(); /*called from softclock()*/ 785 LIST_FOREACH(sp, &sptree[dir], chain) { 786 if (sp->state == IPSEC_SPSTATE_DEAD) 787 continue; 788 789 r1 = r2 = NULL; 790 for (p = sp->req; p; p = p->next) { 791 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 792 continue; 793 794 r1 = r2; 795 r2 = p; 796 797 if (!r1) { 798 /* here we look at address matches only */ 799 spidx = sp->spidx; 800 if (isrc->sa_len > sizeof(spidx.src) || 801 idst->sa_len > sizeof(spidx.dst)) 802 continue; 803 memcpy(&spidx.src, isrc, isrc->sa_len); 804 memcpy(&spidx.dst, idst, idst->sa_len); 805 if (!key_spidx_match_withmask(&sp->spidx, &spidx)) 806 continue; 807 } else { 808 if (!key_sockaddr_match(&r1->saidx.src.sa, isrc, PORT_NONE) || 809 !key_sockaddr_match(&r1->saidx.dst.sa, idst, PORT_NONE)) 810 continue; 811 } 812 813 if (!key_sockaddr_match(&r2->saidx.src.sa, osrc, PORT_NONE) || 814 !key_sockaddr_match(&r2->saidx.dst.sa, odst, PORT_NONE)) 815 continue; 816 817 goto found; 818 } 819 } 820 sp = NULL; 821 found: 822 if (sp) { 823 sp->lastused = time_uptime; 824 SP_ADDREF2(sp, where, tag); 825 } 826 splx(s); 827 done: 828 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 829 "DP return SP:%p (ID=%u) refcnt %u\n", 830 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 831 return sp; 832 } 833 834 /* 835 * allocating an SA entry for an *OUTBOUND* packet. 836 * checking each request entries in SP, and acquire an SA if need. 837 * OUT: 0: there are valid requests. 838 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 839 */ 840 int 841 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 842 { 843 u_int level; 844 int error; 845 struct secasvar *oldsav = NULL; 846 847 KASSERT(isr != NULL); 848 KASSERT(saidx != NULL); 849 KASSERTMSG(saidx->mode == IPSEC_MODE_TRANSPORT || 850 saidx->mode == IPSEC_MODE_TUNNEL, 851 "unexpected policy %u", saidx->mode); 852 853 /* get current level */ 854 level = ipsec_get_reqlevel(isr); 855 856 /* 857 * XXX guard against protocol callbacks from the crypto 858 * thread as they reference ipsecrequest.sav which we 859 * temporarily null out below. Need to rethink how we 860 * handle bundled SA's in the callback thread. 861 */ 862 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 863 #if 0 864 /* 865 * We do allocate new SA only if the state of SA in the holder is 866 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 867 */ 868 if (isr->sav != NULL) { 869 if (isr->sav->sah == NULL) 870 panic("key_checkrequest: sah is null"); 871 if (isr->sav == (struct secasvar *)LIST_FIRST( 872 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 873 KEY_FREESAV(&isr->sav); 874 isr->sav = NULL; 875 } 876 } 877 #else 878 /* 879 * we free any SA stashed in the IPsec request because a different 880 * SA may be involved each time this request is checked, either 881 * because new SAs are being configured, or this request is 882 * associated with an unconnected datagram socket, or this request 883 * is associated with a system default policy. 884 * 885 * The operation may have negative impact to performance. We may 886 * want to check cached SA carefully, rather than picking new SA 887 * every time. 888 */ 889 if (isr->sav != NULL) 890 oldsav = isr->sav; 891 #endif 892 893 /* 894 * new SA allocation if no SA found. 895 * key_allocsa_policy should allocate the oldest SA available. 896 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 897 */ 898 isr->sav = key_allocsa_policy(saidx); 899 membar_producer(); 900 if (oldsav != NULL) 901 KEY_FREESAV(&oldsav); 902 903 /* When there is SA. */ 904 if (isr->sav != NULL) { 905 if (isr->sav->state != SADB_SASTATE_MATURE && 906 isr->sav->state != SADB_SASTATE_DYING) 907 return EINVAL; 908 return 0; 909 } 910 911 /* there is no SA */ 912 error = key_acquire(saidx, isr->sp); 913 if (error != 0) { 914 /* XXX What should I do ? */ 915 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 916 error); 917 return error; 918 } 919 920 if (level != IPSEC_LEVEL_REQUIRE) { 921 /* XXX sigh, the interface to this routine is botched */ 922 KASSERTMSG(isr->sav == NULL, "unexpected SA"); 923 return 0; 924 } else { 925 return ENOENT; 926 } 927 } 928 929 /* 930 * allocating a SA for policy entry from SAD. 931 * NOTE: searching SAD of aliving state. 932 * OUT: NULL: not found. 933 * others: found and return the pointer. 934 */ 935 static struct secasvar * 936 key_allocsa_policy(const struct secasindex *saidx) 937 { 938 struct secashead *sah; 939 struct secasvar *sav; 940 u_int stateidx, state; 941 const u_int *saorder_state_valid; 942 int arraysize; 943 944 sah = key_getsah(saidx, CMP_MODE_REQID); 945 if (sah == NULL) 946 return NULL; 947 948 /* 949 * search a valid state list for outbound packet. 950 * This search order is important. 951 */ 952 if (key_prefered_oldsa) { 953 saorder_state_valid = saorder_state_valid_prefer_old; 954 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 955 } else { 956 saorder_state_valid = saorder_state_valid_prefer_new; 957 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 958 } 959 960 /* search valid state */ 961 for (stateidx = 0; 962 stateidx < arraysize; 963 stateidx++) { 964 965 state = saorder_state_valid[stateidx]; 966 967 sav = key_do_allocsa_policy(sah, state); 968 if (sav != NULL) 969 return sav; 970 } 971 972 return NULL; 973 } 974 975 static void 976 key_sendup_message_delete(struct secasvar *sav) 977 { 978 struct mbuf *m, *result = 0; 979 uint8_t satype; 980 981 satype = key_proto2satype(sav->sah->saidx.proto); 982 if (satype == 0) 983 goto msgfail; 984 985 m = key_setsadbmsg(SADB_DELETE, 0, satype, 0, 0, sav->refcnt - 1); 986 if (m == NULL) 987 goto msgfail; 988 result = m; 989 990 /* set sadb_address for saidx's. */ 991 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 992 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 993 if (m == NULL) 994 goto msgfail; 995 m_cat(result, m); 996 997 /* set sadb_address for saidx's. */ 998 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.src.sa, 999 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 1000 if (m == NULL) 1001 goto msgfail; 1002 m_cat(result, m); 1003 1004 /* create SA extension */ 1005 m = key_setsadbsa(sav); 1006 if (m == NULL) 1007 goto msgfail; 1008 m_cat(result, m); 1009 1010 if (result->m_len < sizeof(struct sadb_msg)) { 1011 result = m_pullup(result, sizeof(struct sadb_msg)); 1012 if (result == NULL) 1013 goto msgfail; 1014 } 1015 1016 result->m_pkthdr.len = 0; 1017 for (m = result; m; m = m->m_next) 1018 result->m_pkthdr.len += m->m_len; 1019 mtod(result, struct sadb_msg *)->sadb_msg_len = 1020 PFKEY_UNIT64(result->m_pkthdr.len); 1021 1022 key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 1023 result = NULL; 1024 msgfail: 1025 if (result) 1026 m_freem(result); 1027 } 1028 1029 /* 1030 * searching SAD with direction, protocol, mode and state. 1031 * called by key_allocsa_policy(). 1032 * OUT: 1033 * NULL : not found 1034 * others : found, pointer to a SA. 1035 */ 1036 static struct secasvar * 1037 key_do_allocsa_policy(struct secashead *sah, u_int state) 1038 { 1039 struct secasvar *sav, *candidate, *d; 1040 1041 /* initilize */ 1042 candidate = NULL; 1043 1044 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1045 /* sanity check */ 1046 KEY_CHKSASTATE(sav->state, state); 1047 1048 /* initialize */ 1049 if (candidate == NULL) { 1050 candidate = sav; 1051 continue; 1052 } 1053 1054 /* Which SA is the better ? */ 1055 1056 /* sanity check 2 */ 1057 KASSERT(candidate->lft_c != NULL); 1058 KASSERT(sav->lft_c != NULL); 1059 1060 /* What the best method is to compare ? */ 1061 if (key_prefered_oldsa) { 1062 if (candidate->lft_c->sadb_lifetime_addtime > 1063 sav->lft_c->sadb_lifetime_addtime) { 1064 candidate = sav; 1065 } 1066 continue; 1067 /*NOTREACHED*/ 1068 } 1069 1070 /* prefered new sa rather than old sa */ 1071 if (candidate->lft_c->sadb_lifetime_addtime < 1072 sav->lft_c->sadb_lifetime_addtime) { 1073 d = candidate; 1074 candidate = sav; 1075 } else 1076 d = sav; 1077 1078 /* 1079 * prepared to delete the SA when there is more 1080 * suitable candidate and the lifetime of the SA is not 1081 * permanent. 1082 */ 1083 if (d->lft_c->sadb_lifetime_addtime != 0) { 1084 key_sa_chgstate(d, SADB_SASTATE_DEAD); 1085 KASSERT(d->refcnt > 0); 1086 key_sendup_message_delete(d); 1087 KEY_FREESAV(&d); 1088 } 1089 } 1090 1091 if (candidate) { 1092 SA_ADDREF(candidate); 1093 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1094 "DP cause refcnt++:%d SA:%p\n", 1095 candidate->refcnt, candidate); 1096 } 1097 return candidate; 1098 } 1099 1100 /* 1101 * allocating a usable SA entry for a *INBOUND* packet. 1102 * Must call key_freesav() later. 1103 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1104 * NULL: not found, or error occurred. 1105 * 1106 * In the comparison, no source address is used--for RFC2401 conformance. 1107 * To quote, from section 4.1: 1108 * A security association is uniquely identified by a triple consisting 1109 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1110 * security protocol (AH or ESP) identifier. 1111 * Note that, however, we do need to keep source address in IPsec SA. 1112 * IKE specification and PF_KEY specification do assume that we 1113 * keep source address in IPsec SA. We see a tricky situation here. 1114 * 1115 * sport and dport are used for NAT-T. network order is always used. 1116 */ 1117 struct secasvar * 1118 key_lookup_sa( 1119 const union sockaddr_union *dst, 1120 u_int proto, 1121 u_int32_t spi, 1122 u_int16_t sport, 1123 u_int16_t dport, 1124 const char* where, int tag) 1125 { 1126 struct secashead *sah; 1127 struct secasvar *sav; 1128 u_int stateidx, state; 1129 const u_int *saorder_state_valid; 1130 int arraysize, chkport; 1131 int s; 1132 1133 int must_check_spi = 1; 1134 int must_check_alg = 0; 1135 u_int16_t cpi = 0; 1136 u_int8_t algo = 0; 1137 1138 if ((sport != 0) && (dport != 0)) 1139 chkport = PORT_STRICT; 1140 else 1141 chkport = PORT_NONE; 1142 1143 KASSERT(dst != NULL); 1144 1145 /* 1146 * XXX IPCOMP case 1147 * We use cpi to define spi here. In the case where cpi <= 1148 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1149 * the real spi. In this case, don't check the spi but check the 1150 * algorithm 1151 */ 1152 1153 if (proto == IPPROTO_IPCOMP) { 1154 u_int32_t tmp; 1155 tmp = ntohl(spi); 1156 cpi = (u_int16_t) tmp; 1157 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1158 algo = (u_int8_t) cpi; 1159 must_check_spi = 0; 1160 must_check_alg = 1; 1161 } 1162 } 1163 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1164 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1165 where, tag, must_check_spi, must_check_alg); 1166 1167 1168 /* 1169 * searching SAD. 1170 * XXX: to be checked internal IP header somewhere. Also when 1171 * IPsec tunnel packet is received. But ESP tunnel mode is 1172 * encrypted so we can't check internal IP header. 1173 */ 1174 s = splsoftnet(); /*called from softclock()*/ 1175 if (key_prefered_oldsa) { 1176 saorder_state_valid = saorder_state_valid_prefer_old; 1177 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1178 } else { 1179 saorder_state_valid = saorder_state_valid_prefer_new; 1180 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1181 } 1182 LIST_FOREACH(sah, &sahtree, chain) { 1183 /* search valid state */ 1184 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1185 state = saorder_state_valid[stateidx]; 1186 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1187 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1188 "try match spi %#x, %#x\n", 1189 ntohl(spi), ntohl(sav->spi)); 1190 /* sanity check */ 1191 KEY_CHKSASTATE(sav->state, state); 1192 /* do not return entries w/ unusable state */ 1193 if (!SADB_SASTATE_USABLE_P(sav)) { 1194 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1195 "bad state %d\n", sav->state); 1196 continue; 1197 } 1198 if (proto != sav->sah->saidx.proto) { 1199 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1200 "proto fail %d != %d\n", 1201 proto, sav->sah->saidx.proto); 1202 continue; 1203 } 1204 if (must_check_spi && spi != sav->spi) { 1205 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1206 "spi fail %#x != %#x\n", 1207 ntohl(spi), ntohl(sav->spi)); 1208 continue; 1209 } 1210 /* XXX only on the ipcomp case */ 1211 if (must_check_alg && algo != sav->alg_comp) { 1212 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1213 "algo fail %d != %d\n", 1214 algo, sav->alg_comp); 1215 continue; 1216 } 1217 1218 #if 0 /* don't check src */ 1219 /* Fix port in src->sa */ 1220 1221 /* check src address */ 1222 if (!key_sockaddr_match(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE)) 1223 continue; 1224 #endif 1225 /* fix port of dst address XXX*/ 1226 key_porttosaddr(__UNCONST(dst), dport); 1227 /* check dst address */ 1228 if (!key_sockaddr_match(&dst->sa, &sav->sah->saidx.dst.sa, chkport)) 1229 continue; 1230 SA_ADDREF2(sav, where, tag); 1231 goto done; 1232 } 1233 } 1234 } 1235 sav = NULL; 1236 done: 1237 splx(s); 1238 1239 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1240 "DP return SA:%p; refcnt %u\n", sav, sav ? sav->refcnt : 0); 1241 return sav; 1242 } 1243 1244 void 1245 key_sp_ref(struct secpolicy *sp, const char* where, int tag) 1246 { 1247 1248 SP_ADDREF2(sp, where, tag); 1249 1250 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1251 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1252 sp, sp->id, where, tag, sp->refcnt); 1253 } 1254 1255 /* 1256 * Must be called after calling key_lookup_sp*(). 1257 * For both the packet without socket and key_freeso(). 1258 */ 1259 void 1260 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1261 { 1262 struct secpolicy *sp = *spp; 1263 unsigned int nv; 1264 1265 KASSERT(sp != NULL); 1266 1267 SP_DELREF2(sp, nv, where, tag); 1268 1269 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1270 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1271 sp, sp->id, where, tag, nv); 1272 1273 if (nv == 0) { 1274 *spp = NULL; 1275 key_delsp(sp); 1276 } 1277 } 1278 1279 #if 0 1280 /* 1281 * Must be called after calling key_lookup_sp*(). 1282 * For the packet with socket. 1283 */ 1284 static void 1285 key_freeso(struct socket *so) 1286 { 1287 /* sanity check */ 1288 KASSERT(so != NULL); 1289 1290 switch (so->so_proto->pr_domain->dom_family) { 1291 #ifdef INET 1292 case PF_INET: 1293 { 1294 struct inpcb *pcb = sotoinpcb(so); 1295 1296 /* Does it have a PCB ? */ 1297 if (pcb == NULL) 1298 return; 1299 1300 struct inpcbpolicy *sp = pcb->inp_sp; 1301 key_freesp_so(&sp->sp_in); 1302 key_freesp_so(&sp->sp_out); 1303 } 1304 break; 1305 #endif 1306 #ifdef INET6 1307 case PF_INET6: 1308 { 1309 #ifdef HAVE_NRL_INPCB 1310 struct inpcb *pcb = sotoinpcb(so); 1311 struct inpcbpolicy *sp = pcb->inp_sp; 1312 1313 /* Does it have a PCB ? */ 1314 if (pcb == NULL) 1315 return; 1316 key_freesp_so(&sp->sp_in); 1317 key_freesp_so(&sp->sp_out); 1318 #else 1319 struct in6pcb *pcb = sotoin6pcb(so); 1320 1321 /* Does it have a PCB ? */ 1322 if (pcb == NULL) 1323 return; 1324 key_freesp_so(&pcb->in6p_sp->sp_in); 1325 key_freesp_so(&pcb->in6p_sp->sp_out); 1326 #endif 1327 } 1328 break; 1329 #endif /* INET6 */ 1330 default: 1331 IPSECLOG(LOG_DEBUG, "unknown address family=%d.\n", 1332 so->so_proto->pr_domain->dom_family); 1333 return; 1334 } 1335 } 1336 1337 static void 1338 key_freesp_so(struct secpolicy **sp) 1339 { 1340 1341 KASSERT(sp != NULL); 1342 KASSERT(*sp != NULL); 1343 1344 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1345 (*sp)->policy == IPSEC_POLICY_BYPASS) 1346 return; 1347 1348 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1349 "invalid policy %u", (*sp)->policy); 1350 KEY_FREESP(sp); 1351 } 1352 #endif 1353 1354 /* 1355 * Must be called after calling key_lookup_sa(). 1356 * This function is called by key_freesp() to free some SA allocated 1357 * for a policy. 1358 */ 1359 void 1360 key_freesav(struct secasvar **psav, const char* where, int tag) 1361 { 1362 struct secasvar *sav = *psav; 1363 unsigned int nv; 1364 1365 KASSERT(sav != NULL); 1366 1367 SA_DELREF2(sav, nv, where, tag); 1368 1369 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1370 "DP SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1371 sav, (u_long)ntohl(sav->spi), where, tag, nv); 1372 1373 if (nv == 0) { 1374 *psav = NULL; 1375 1376 /* remove from SA header */ 1377 KASSERT(__LIST_CHAINED(sav)); 1378 LIST_REMOVE(sav, chain); 1379 1380 key_delsav(sav); 1381 } 1382 } 1383 1384 /* %%% SPD management */ 1385 /* 1386 * free security policy entry. 1387 */ 1388 static void 1389 key_delsp(struct secpolicy *sp) 1390 { 1391 int s; 1392 1393 KASSERT(sp != NULL); 1394 1395 key_sp_dead(sp); 1396 1397 KASSERTMSG(sp->refcnt == 0, 1398 "SP with references deleted (refcnt %u)", sp->refcnt); 1399 1400 s = splsoftnet(); /*called from softclock()*/ 1401 1402 { 1403 struct ipsecrequest *isr = sp->req, *nextisr; 1404 1405 while (isr != NULL) { 1406 if (isr->sav != NULL) { 1407 KEY_FREESAV(&isr->sav); 1408 isr->sav = NULL; 1409 } 1410 1411 nextisr = isr->next; 1412 kmem_intr_free(isr, sizeof(*isr)); 1413 isr = nextisr; 1414 } 1415 } 1416 1417 kmem_intr_free(sp, sizeof(*sp)); 1418 1419 splx(s); 1420 } 1421 1422 /* 1423 * search SPD 1424 * OUT: NULL : not found 1425 * others : found, pointer to a SP. 1426 */ 1427 static struct secpolicy * 1428 key_getsp(const struct secpolicyindex *spidx) 1429 { 1430 struct secpolicy *sp; 1431 1432 KASSERT(spidx != NULL); 1433 1434 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1435 if (sp->state == IPSEC_SPSTATE_DEAD) 1436 continue; 1437 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1438 SP_ADDREF(sp); 1439 return sp; 1440 } 1441 } 1442 1443 return NULL; 1444 } 1445 1446 /* 1447 * get SP by index. 1448 * OUT: NULL : not found 1449 * others : found, pointer to a SP. 1450 */ 1451 static struct secpolicy * 1452 key_getspbyid(u_int32_t id) 1453 { 1454 struct secpolicy *sp; 1455 1456 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1457 if (sp->state == IPSEC_SPSTATE_DEAD) 1458 continue; 1459 if (sp->id == id) { 1460 SP_ADDREF(sp); 1461 return sp; 1462 } 1463 } 1464 1465 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1466 if (sp->state == IPSEC_SPSTATE_DEAD) 1467 continue; 1468 if (sp->id == id) { 1469 SP_ADDREF(sp); 1470 return sp; 1471 } 1472 } 1473 1474 return NULL; 1475 } 1476 1477 struct secpolicy * 1478 key_newsp(const char* where, int tag) 1479 { 1480 struct secpolicy *newsp = NULL; 1481 1482 newsp = kmem_intr_zalloc(sizeof(struct secpolicy), KM_NOSLEEP); 1483 if (newsp != NULL) 1484 newsp->refcnt = 1; 1485 1486 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1487 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1488 return newsp; 1489 } 1490 1491 /* 1492 * create secpolicy structure from sadb_x_policy structure. 1493 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1494 * so must be set properly later. 1495 */ 1496 struct secpolicy * 1497 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1498 { 1499 struct secpolicy *newsp; 1500 1501 KASSERT(!cpu_softintr_p()); 1502 KASSERT(xpl0 != NULL); 1503 KASSERT(len >= sizeof(*xpl0)); 1504 1505 if (len != PFKEY_EXTLEN(xpl0)) { 1506 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1507 *error = EINVAL; 1508 return NULL; 1509 } 1510 1511 newsp = KEY_NEWSP(); 1512 if (newsp == NULL) { 1513 *error = ENOBUFS; 1514 return NULL; 1515 } 1516 1517 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1518 newsp->policy = xpl0->sadb_x_policy_type; 1519 1520 /* check policy */ 1521 switch (xpl0->sadb_x_policy_type) { 1522 case IPSEC_POLICY_DISCARD: 1523 case IPSEC_POLICY_NONE: 1524 case IPSEC_POLICY_ENTRUST: 1525 case IPSEC_POLICY_BYPASS: 1526 newsp->req = NULL; 1527 *error = 0; 1528 return newsp; 1529 1530 case IPSEC_POLICY_IPSEC: 1531 /* Continued */ 1532 break; 1533 default: 1534 IPSECLOG(LOG_DEBUG, "invalid policy type.\n"); 1535 KEY_FREESP(&newsp); 1536 *error = EINVAL; 1537 return NULL; 1538 } 1539 1540 /* IPSEC_POLICY_IPSEC */ 1541 { 1542 int tlen; 1543 const struct sadb_x_ipsecrequest *xisr; 1544 uint16_t xisr_reqid; 1545 struct ipsecrequest **p_isr = &newsp->req; 1546 1547 /* validity check */ 1548 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1549 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1550 *error = EINVAL; 1551 goto free_exit; 1552 } 1553 1554 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1555 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1556 1557 while (tlen > 0) { 1558 /* length check */ 1559 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1560 IPSECLOG(LOG_DEBUG, "invalid ipsecrequest length.\n"); 1561 *error = EINVAL; 1562 goto free_exit; 1563 } 1564 1565 /* allocate request buffer */ 1566 *p_isr = kmem_zalloc(sizeof(**p_isr), KM_SLEEP); 1567 1568 /* set values */ 1569 (*p_isr)->next = NULL; 1570 1571 switch (xisr->sadb_x_ipsecrequest_proto) { 1572 case IPPROTO_ESP: 1573 case IPPROTO_AH: 1574 case IPPROTO_IPCOMP: 1575 break; 1576 default: 1577 IPSECLOG(LOG_DEBUG, "invalid proto type=%u\n", 1578 xisr->sadb_x_ipsecrequest_proto); 1579 *error = EPROTONOSUPPORT; 1580 goto free_exit; 1581 } 1582 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1583 1584 switch (xisr->sadb_x_ipsecrequest_mode) { 1585 case IPSEC_MODE_TRANSPORT: 1586 case IPSEC_MODE_TUNNEL: 1587 break; 1588 case IPSEC_MODE_ANY: 1589 default: 1590 IPSECLOG(LOG_DEBUG, "invalid mode=%u\n", 1591 xisr->sadb_x_ipsecrequest_mode); 1592 *error = EINVAL; 1593 goto free_exit; 1594 } 1595 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1596 1597 switch (xisr->sadb_x_ipsecrequest_level) { 1598 case IPSEC_LEVEL_DEFAULT: 1599 case IPSEC_LEVEL_USE: 1600 case IPSEC_LEVEL_REQUIRE: 1601 break; 1602 case IPSEC_LEVEL_UNIQUE: 1603 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1604 /* validity check */ 1605 /* 1606 * If range violation of reqid, kernel will 1607 * update it, don't refuse it. 1608 */ 1609 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1610 IPSECLOG(LOG_DEBUG, 1611 "reqid=%d range " 1612 "violation, updated by kernel.\n", 1613 xisr_reqid); 1614 xisr_reqid = 0; 1615 } 1616 1617 /* allocate new reqid id if reqid is zero. */ 1618 if (xisr_reqid == 0) { 1619 u_int16_t reqid = key_newreqid(); 1620 if (reqid == 0) { 1621 *error = ENOBUFS; 1622 goto free_exit; 1623 } 1624 (*p_isr)->saidx.reqid = reqid; 1625 } else { 1626 /* set it for manual keying. */ 1627 (*p_isr)->saidx.reqid = xisr_reqid; 1628 } 1629 break; 1630 1631 default: 1632 IPSECLOG(LOG_DEBUG, "invalid level=%u\n", 1633 xisr->sadb_x_ipsecrequest_level); 1634 *error = EINVAL; 1635 goto free_exit; 1636 } 1637 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1638 1639 /* set IP addresses if there */ 1640 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1641 const struct sockaddr *paddr; 1642 1643 paddr = (const struct sockaddr *)(xisr + 1); 1644 1645 /* validity check */ 1646 if (paddr->sa_len > sizeof((*p_isr)->saidx.src)) { 1647 IPSECLOG(LOG_DEBUG, "invalid request " 1648 "address length.\n"); 1649 *error = EINVAL; 1650 goto free_exit; 1651 } 1652 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1653 1654 paddr = (const struct sockaddr *)((const char *)paddr 1655 + paddr->sa_len); 1656 1657 /* validity check */ 1658 if (paddr->sa_len > sizeof((*p_isr)->saidx.dst)) { 1659 IPSECLOG(LOG_DEBUG, "invalid request " 1660 "address length.\n"); 1661 *error = EINVAL; 1662 goto free_exit; 1663 } 1664 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1665 } 1666 1667 (*p_isr)->sav = NULL; 1668 (*p_isr)->sp = newsp; 1669 1670 /* initialization for the next. */ 1671 p_isr = &(*p_isr)->next; 1672 tlen -= xisr->sadb_x_ipsecrequest_len; 1673 1674 /* validity check */ 1675 if (tlen < 0) { 1676 IPSECLOG(LOG_DEBUG, "becoming tlen < 0.\n"); 1677 *error = EINVAL; 1678 goto free_exit; 1679 } 1680 1681 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr + 1682 xisr->sadb_x_ipsecrequest_len); 1683 } 1684 } 1685 1686 *error = 0; 1687 return newsp; 1688 1689 free_exit: 1690 KEY_FREESP(&newsp); 1691 return NULL; 1692 } 1693 1694 static u_int16_t 1695 key_newreqid(void) 1696 { 1697 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1698 1699 auto_reqid = (auto_reqid == 0xffff ? 1700 IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1701 1702 /* XXX should be unique check */ 1703 1704 return auto_reqid; 1705 } 1706 1707 /* 1708 * copy secpolicy struct to sadb_x_policy structure indicated. 1709 */ 1710 struct mbuf * 1711 key_sp2msg(const struct secpolicy *sp) 1712 { 1713 struct sadb_x_policy *xpl; 1714 int tlen; 1715 char *p; 1716 struct mbuf *m; 1717 1718 KASSERT(sp != NULL); 1719 1720 tlen = key_getspreqmsglen(sp); 1721 1722 m = key_alloc_mbuf(tlen); 1723 if (!m || m->m_next) { /*XXX*/ 1724 if (m) 1725 m_freem(m); 1726 return NULL; 1727 } 1728 1729 m->m_len = tlen; 1730 m->m_next = NULL; 1731 xpl = mtod(m, struct sadb_x_policy *); 1732 memset(xpl, 0, tlen); 1733 1734 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1735 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1736 xpl->sadb_x_policy_type = sp->policy; 1737 xpl->sadb_x_policy_dir = sp->spidx.dir; 1738 xpl->sadb_x_policy_id = sp->id; 1739 p = (char *)xpl + sizeof(*xpl); 1740 1741 /* if is the policy for ipsec ? */ 1742 if (sp->policy == IPSEC_POLICY_IPSEC) { 1743 struct sadb_x_ipsecrequest *xisr; 1744 struct ipsecrequest *isr; 1745 1746 for (isr = sp->req; isr != NULL; isr = isr->next) { 1747 1748 xisr = (struct sadb_x_ipsecrequest *)p; 1749 1750 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1751 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1752 xisr->sadb_x_ipsecrequest_level = isr->level; 1753 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1754 1755 p += sizeof(*xisr); 1756 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1757 p += isr->saidx.src.sa.sa_len; 1758 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1759 p += isr->saidx.src.sa.sa_len; 1760 1761 xisr->sadb_x_ipsecrequest_len = 1762 PFKEY_ALIGN8(sizeof(*xisr) 1763 + isr->saidx.src.sa.sa_len 1764 + isr->saidx.dst.sa.sa_len); 1765 } 1766 } 1767 1768 return m; 1769 } 1770 1771 /* m will not be freed nor modified */ 1772 static struct mbuf * 1773 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1774 int ndeep, int nitem, ...) 1775 { 1776 va_list ap; 1777 int idx; 1778 int i; 1779 struct mbuf *result = NULL, *n; 1780 int len; 1781 1782 KASSERT(m != NULL); 1783 KASSERT(mhp != NULL); 1784 1785 va_start(ap, nitem); 1786 for (i = 0; i < nitem; i++) { 1787 idx = va_arg(ap, int); 1788 if (idx < 0 || idx > SADB_EXT_MAX) 1789 goto fail; 1790 /* don't attempt to pull empty extension */ 1791 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1792 continue; 1793 if (idx != SADB_EXT_RESERVED && 1794 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1795 continue; 1796 1797 if (idx == SADB_EXT_RESERVED) { 1798 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 1799 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1800 MGETHDR(n, M_DONTWAIT, MT_DATA); 1801 if (!n) 1802 goto fail; 1803 n->m_len = len; 1804 n->m_next = NULL; 1805 m_copydata(m, 0, sizeof(struct sadb_msg), 1806 mtod(n, void *)); 1807 } else if (i < ndeep) { 1808 len = mhp->extlen[idx]; 1809 n = key_alloc_mbuf(len); 1810 if (!n || n->m_next) { /*XXX*/ 1811 if (n) 1812 m_freem(n); 1813 goto fail; 1814 } 1815 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1816 mtod(n, void *)); 1817 } else { 1818 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1819 M_DONTWAIT); 1820 } 1821 if (n == NULL) 1822 goto fail; 1823 1824 if (result) 1825 m_cat(result, n); 1826 else 1827 result = n; 1828 } 1829 va_end(ap); 1830 1831 if (result && (result->m_flags & M_PKTHDR) != 0) { 1832 result->m_pkthdr.len = 0; 1833 for (n = result; n; n = n->m_next) 1834 result->m_pkthdr.len += n->m_len; 1835 } 1836 1837 return result; 1838 1839 fail: 1840 va_end(ap); 1841 m_freem(result); 1842 return NULL; 1843 } 1844 1845 /* 1846 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1847 * add an entry to SP database, when received 1848 * <base, address(SD), (lifetime(H),) policy> 1849 * from the user(?). 1850 * Adding to SP database, 1851 * and send 1852 * <base, address(SD), (lifetime(H),) policy> 1853 * to the socket which was send. 1854 * 1855 * SPDADD set a unique policy entry. 1856 * SPDSETIDX like SPDADD without a part of policy requests. 1857 * SPDUPDATE replace a unique policy entry. 1858 * 1859 * m will always be freed. 1860 */ 1861 static int 1862 key_api_spdadd(struct socket *so, struct mbuf *m, 1863 const struct sadb_msghdr *mhp) 1864 { 1865 const struct sockaddr *src, *dst; 1866 const struct sadb_x_policy *xpl0; 1867 struct sadb_x_policy *xpl; 1868 const struct sadb_lifetime *lft = NULL; 1869 struct secpolicyindex spidx; 1870 struct secpolicy *newsp; 1871 int error; 1872 1873 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1874 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1875 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1876 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1877 return key_senderror(so, m, EINVAL); 1878 } 1879 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1880 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1881 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1882 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1883 return key_senderror(so, m, EINVAL); 1884 } 1885 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1886 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < 1887 sizeof(struct sadb_lifetime)) { 1888 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1889 return key_senderror(so, m, EINVAL); 1890 } 1891 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1892 } 1893 1894 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1895 1896 /* checking the direciton. */ 1897 switch (xpl0->sadb_x_policy_dir) { 1898 case IPSEC_DIR_INBOUND: 1899 case IPSEC_DIR_OUTBOUND: 1900 break; 1901 default: 1902 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 1903 return key_senderror(so, m, EINVAL); 1904 } 1905 1906 /* check policy */ 1907 /* key_api_spdadd() accepts DISCARD, NONE and IPSEC. */ 1908 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST || 1909 xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1910 IPSECLOG(LOG_DEBUG, "Invalid policy type.\n"); 1911 return key_senderror(so, m, EINVAL); 1912 } 1913 1914 /* policy requests are mandatory when action is ipsec. */ 1915 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && 1916 xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 1917 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1918 IPSECLOG(LOG_DEBUG, "some policy requests part required.\n"); 1919 return key_senderror(so, m, EINVAL); 1920 } 1921 1922 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 1923 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 1924 1925 /* sanity check on addr pair */ 1926 if (src->sa_family != dst->sa_family) 1927 return key_senderror(so, m, EINVAL); 1928 if (src->sa_len != dst->sa_len) 1929 return key_senderror(so, m, EINVAL); 1930 1931 key_init_spidx_bymsghdr(&spidx, mhp); 1932 1933 /* 1934 * checking there is SP already or not. 1935 * SPDUPDATE doesn't depend on whether there is a SP or not. 1936 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1937 * then error. 1938 */ 1939 { 1940 struct secpolicy *sp; 1941 1942 sp = key_getsp(&spidx); 1943 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1944 if (sp) { 1945 key_sp_dead(sp); 1946 key_sp_unlink(sp); /* XXX jrs ordering */ 1947 KEY_FREESP(&sp); 1948 } 1949 } else { 1950 if (sp != NULL) { 1951 KEY_FREESP(&sp); 1952 IPSECLOG(LOG_DEBUG, "a SP entry exists already.\n"); 1953 return key_senderror(so, m, EEXIST); 1954 } 1955 } 1956 } 1957 1958 /* allocation new SP entry */ 1959 newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error); 1960 if (newsp == NULL) { 1961 return key_senderror(so, m, error); 1962 } 1963 1964 newsp->id = key_getnewspid(); 1965 if (newsp->id == 0) { 1966 kmem_free(newsp, sizeof(*newsp)); 1967 return key_senderror(so, m, ENOBUFS); 1968 } 1969 1970 newsp->spidx = spidx; 1971 newsp->created = time_uptime; 1972 newsp->lastused = newsp->created; 1973 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1974 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1975 1976 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1977 newsp->state = IPSEC_SPSTATE_ALIVE; 1978 if (newsp->policy == IPSEC_POLICY_IPSEC) 1979 KASSERT(newsp->req != NULL); 1980 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1981 1982 #ifdef notyet 1983 /* delete the entry in spacqtree */ 1984 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1985 struct secspacq *spacq = key_getspacq(&spidx); 1986 if (spacq != NULL) { 1987 /* reset counter in order to deletion by timehandler. */ 1988 spacq->created = time_uptime; 1989 spacq->count = 0; 1990 } 1991 } 1992 #endif 1993 1994 /* Invalidate all cached SPD pointers in the PCBs. */ 1995 ipsec_invalpcbcacheall(); 1996 1997 #if defined(GATEWAY) 1998 /* Invalidate the ipflow cache, as well. */ 1999 ipflow_invalidate_all(0); 2000 #ifdef INET6 2001 if (in6_present) 2002 ip6flow_invalidate_all(0); 2003 #endif /* INET6 */ 2004 #endif /* GATEWAY */ 2005 2006 { 2007 struct mbuf *n, *mpolicy; 2008 int off; 2009 2010 /* create new sadb_msg to reply. */ 2011 if (lft) { 2012 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 2013 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 2014 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2015 } else { 2016 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2017 SADB_X_EXT_POLICY, 2018 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2019 } 2020 if (!n) 2021 return key_senderror(so, m, ENOBUFS); 2022 2023 n = key_fill_replymsg(n, 0); 2024 if (n == NULL) 2025 return key_senderror(so, m, ENOBUFS); 2026 2027 off = 0; 2028 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2029 sizeof(*xpl), &off); 2030 if (mpolicy == NULL) { 2031 /* n is already freed */ 2032 return key_senderror(so, m, ENOBUFS); 2033 } 2034 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2035 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2036 m_freem(n); 2037 return key_senderror(so, m, EINVAL); 2038 } 2039 xpl->sadb_x_policy_id = newsp->id; 2040 2041 m_freem(m); 2042 key_update_used(); 2043 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2044 } 2045 } 2046 2047 /* 2048 * get new policy id. 2049 * OUT: 2050 * 0: failure. 2051 * others: success. 2052 */ 2053 static u_int32_t 2054 key_getnewspid(void) 2055 { 2056 u_int32_t newid = 0; 2057 int count = key_spi_trycnt; /* XXX */ 2058 struct secpolicy *sp; 2059 2060 /* when requesting to allocate spi ranged */ 2061 while (count--) { 2062 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2063 2064 sp = key_getspbyid(newid); 2065 if (sp == NULL) 2066 break; 2067 2068 KEY_FREESP(&sp); 2069 } 2070 2071 if (count == 0 || newid == 0) { 2072 IPSECLOG(LOG_DEBUG, "to allocate policy id is failed.\n"); 2073 return 0; 2074 } 2075 2076 return newid; 2077 } 2078 2079 /* 2080 * SADB_SPDDELETE processing 2081 * receive 2082 * <base, address(SD), policy(*)> 2083 * from the user(?), and set SADB_SASTATE_DEAD, 2084 * and send, 2085 * <base, address(SD), policy(*)> 2086 * to the ikmpd. 2087 * policy(*) including direction of policy. 2088 * 2089 * m will always be freed. 2090 */ 2091 static int 2092 key_api_spddelete(struct socket *so, struct mbuf *m, 2093 const struct sadb_msghdr *mhp) 2094 { 2095 struct sadb_x_policy *xpl0; 2096 struct secpolicyindex spidx; 2097 struct secpolicy *sp; 2098 2099 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2100 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2101 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2102 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2103 return key_senderror(so, m, EINVAL); 2104 } 2105 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2106 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2107 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2108 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2109 return key_senderror(so, m, EINVAL); 2110 } 2111 2112 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2113 2114 /* checking the direciton. */ 2115 switch (xpl0->sadb_x_policy_dir) { 2116 case IPSEC_DIR_INBOUND: 2117 case IPSEC_DIR_OUTBOUND: 2118 break; 2119 default: 2120 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2121 return key_senderror(so, m, EINVAL); 2122 } 2123 2124 /* make secindex */ 2125 key_init_spidx_bymsghdr(&spidx, mhp); 2126 2127 /* Is there SP in SPD ? */ 2128 sp = key_getsp(&spidx); 2129 if (sp == NULL) { 2130 IPSECLOG(LOG_DEBUG, "no SP found.\n"); 2131 return key_senderror(so, m, EINVAL); 2132 } 2133 2134 /* save policy id to buffer to be returned. */ 2135 xpl0->sadb_x_policy_id = sp->id; 2136 2137 key_sp_dead(sp); 2138 key_sp_unlink(sp); /* XXX jrs ordering */ 2139 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2140 2141 /* Invalidate all cached SPD pointers in the PCBs. */ 2142 ipsec_invalpcbcacheall(); 2143 2144 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2145 2146 { 2147 struct mbuf *n; 2148 2149 /* create new sadb_msg to reply. */ 2150 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2151 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2152 if (!n) 2153 return key_senderror(so, m, ENOBUFS); 2154 2155 n = key_fill_replymsg(n, 0); 2156 if (n == NULL) 2157 return key_senderror(so, m, ENOBUFS); 2158 2159 m_freem(m); 2160 key_update_used(); 2161 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2162 } 2163 } 2164 2165 /* 2166 * SADB_SPDDELETE2 processing 2167 * receive 2168 * <base, policy(*)> 2169 * from the user(?), and set SADB_SASTATE_DEAD, 2170 * and send, 2171 * <base, policy(*)> 2172 * to the ikmpd. 2173 * policy(*) including direction of policy. 2174 * 2175 * m will always be freed. 2176 */ 2177 static int 2178 key_api_spddelete2(struct socket *so, struct mbuf *m, 2179 const struct sadb_msghdr *mhp) 2180 { 2181 u_int32_t id; 2182 struct secpolicy *sp; 2183 2184 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2185 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2186 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2187 return key_senderror(so, m, EINVAL); 2188 } 2189 2190 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2191 2192 /* Is there SP in SPD ? */ 2193 sp = key_getspbyid(id); 2194 if (sp == NULL) { 2195 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2196 return key_senderror(so, m, EINVAL); 2197 } 2198 2199 key_sp_dead(sp); 2200 key_sp_unlink(sp); /* XXX jrs ordering */ 2201 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2202 sp = NULL; 2203 2204 /* Invalidate all cached SPD pointers in the PCBs. */ 2205 ipsec_invalpcbcacheall(); 2206 2207 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2208 2209 { 2210 struct mbuf *n, *nn; 2211 int off, len; 2212 2213 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 2214 2215 /* create new sadb_msg to reply. */ 2216 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2217 2218 MGETHDR(n, M_DONTWAIT, MT_DATA); 2219 if (n && len > MHLEN) { 2220 MCLGET(n, M_DONTWAIT); 2221 if ((n->m_flags & M_EXT) == 0) { 2222 m_freem(n); 2223 n = NULL; 2224 } 2225 } 2226 if (!n) 2227 return key_senderror(so, m, ENOBUFS); 2228 2229 n->m_len = len; 2230 n->m_next = NULL; 2231 off = 0; 2232 2233 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2234 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2235 2236 KASSERTMSG(off == len, "length inconsistency"); 2237 2238 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2239 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2240 if (!n->m_next) { 2241 m_freem(n); 2242 return key_senderror(so, m, ENOBUFS); 2243 } 2244 2245 n->m_pkthdr.len = 0; 2246 for (nn = n; nn; nn = nn->m_next) 2247 n->m_pkthdr.len += nn->m_len; 2248 2249 n = key_fill_replymsg(n, 0); 2250 if (n == NULL) 2251 return key_senderror(so, m, ENOBUFS); 2252 2253 m_freem(m); 2254 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2255 } 2256 } 2257 2258 /* 2259 * SADB_X_GET processing 2260 * receive 2261 * <base, policy(*)> 2262 * from the user(?), 2263 * and send, 2264 * <base, address(SD), policy> 2265 * to the ikmpd. 2266 * policy(*) including direction of policy. 2267 * 2268 * m will always be freed. 2269 */ 2270 static int 2271 key_api_spdget(struct socket *so, struct mbuf *m, 2272 const struct sadb_msghdr *mhp) 2273 { 2274 u_int32_t id; 2275 struct secpolicy *sp; 2276 struct mbuf *n; 2277 2278 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2279 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2280 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2281 return key_senderror(so, m, EINVAL); 2282 } 2283 2284 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2285 2286 /* Is there SP in SPD ? */ 2287 sp = key_getspbyid(id); 2288 if (sp == NULL) { 2289 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2290 return key_senderror(so, m, ENOENT); 2291 } 2292 2293 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2294 mhp->msg->sadb_msg_pid); 2295 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2296 if (n != NULL) { 2297 m_freem(m); 2298 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2299 } else 2300 return key_senderror(so, m, ENOBUFS); 2301 } 2302 2303 #ifdef notyet 2304 /* 2305 * SADB_X_SPDACQUIRE processing. 2306 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2307 * send 2308 * <base, policy(*)> 2309 * to KMD, and expect to receive 2310 * <base> with SADB_X_SPDACQUIRE if error occurred, 2311 * or 2312 * <base, policy> 2313 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2314 * policy(*) is without policy requests. 2315 * 2316 * 0 : succeed 2317 * others: error number 2318 */ 2319 int 2320 key_spdacquire(const struct secpolicy *sp) 2321 { 2322 struct mbuf *result = NULL, *m; 2323 struct secspacq *newspacq; 2324 int error; 2325 2326 KASSERT(sp != NULL); 2327 KASSERTMSG(sp->req == NULL, "called but there is request"); 2328 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2329 "policy mismathed. IPsec is expected"); 2330 2331 /* Get an entry to check whether sent message or not. */ 2332 newspacq = key_getspacq(&sp->spidx); 2333 if (newspacq != NULL) { 2334 if (key_blockacq_count < newspacq->count) { 2335 /* reset counter and do send message. */ 2336 newspacq->count = 0; 2337 } else { 2338 /* increment counter and do nothing. */ 2339 newspacq->count++; 2340 return 0; 2341 } 2342 } else { 2343 /* make new entry for blocking to send SADB_ACQUIRE. */ 2344 newspacq = key_newspacq(&sp->spidx); 2345 if (newspacq == NULL) 2346 return ENOBUFS; 2347 2348 /* add to acqtree */ 2349 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2350 } 2351 2352 /* create new sadb_msg to reply. */ 2353 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2354 if (!m) { 2355 error = ENOBUFS; 2356 goto fail; 2357 } 2358 result = m; 2359 2360 result->m_pkthdr.len = 0; 2361 for (m = result; m; m = m->m_next) 2362 result->m_pkthdr.len += m->m_len; 2363 2364 mtod(result, struct sadb_msg *)->sadb_msg_len = 2365 PFKEY_UNIT64(result->m_pkthdr.len); 2366 2367 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2368 2369 fail: 2370 if (result) 2371 m_freem(result); 2372 return error; 2373 } 2374 #endif /* notyet */ 2375 2376 /* 2377 * SADB_SPDFLUSH processing 2378 * receive 2379 * <base> 2380 * from the user, and free all entries in secpctree. 2381 * and send, 2382 * <base> 2383 * to the user. 2384 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2385 * 2386 * m will always be freed. 2387 */ 2388 static int 2389 key_api_spdflush(struct socket *so, struct mbuf *m, 2390 const struct sadb_msghdr *mhp) 2391 { 2392 struct sadb_msg *newmsg; 2393 struct secpolicy *sp; 2394 u_int dir; 2395 2396 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2397 return key_senderror(so, m, EINVAL); 2398 2399 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2400 struct secpolicy * nextsp; 2401 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 2402 if (sp->state == IPSEC_SPSTATE_DEAD) 2403 continue; 2404 key_sp_dead(sp); 2405 key_sp_unlink(sp); 2406 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2407 continue; 2408 } 2409 } 2410 2411 /* Invalidate all cached SPD pointers in the PCBs. */ 2412 ipsec_invalpcbcacheall(); 2413 2414 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2415 2416 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2417 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 2418 return key_senderror(so, m, ENOBUFS); 2419 } 2420 2421 if (m->m_next) 2422 m_freem(m->m_next); 2423 m->m_next = NULL; 2424 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2425 newmsg = mtod(m, struct sadb_msg *); 2426 newmsg->sadb_msg_errno = 0; 2427 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2428 2429 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2430 } 2431 2432 static struct sockaddr key_src = { 2433 .sa_len = 2, 2434 .sa_family = PF_KEY, 2435 }; 2436 2437 static struct mbuf * 2438 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2439 { 2440 struct secpolicy *sp; 2441 int cnt; 2442 u_int dir; 2443 struct mbuf *m, *n, *prev; 2444 int totlen; 2445 2446 *lenp = 0; 2447 2448 /* search SPD entry and get buffer size. */ 2449 cnt = 0; 2450 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2451 LIST_FOREACH(sp, &sptree[dir], chain) { 2452 cnt++; 2453 } 2454 } 2455 2456 if (cnt == 0) { 2457 *errorp = ENOENT; 2458 return (NULL); 2459 } 2460 2461 m = NULL; 2462 prev = m; 2463 totlen = 0; 2464 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2465 LIST_FOREACH(sp, &sptree[dir], chain) { 2466 --cnt; 2467 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2468 2469 if (!n) { 2470 *errorp = ENOBUFS; 2471 if (m) 2472 m_freem(m); 2473 return (NULL); 2474 } 2475 2476 totlen += n->m_pkthdr.len; 2477 if (!m) { 2478 m = n; 2479 } else { 2480 prev->m_nextpkt = n; 2481 } 2482 prev = n; 2483 } 2484 } 2485 2486 *lenp = totlen; 2487 *errorp = 0; 2488 return (m); 2489 } 2490 2491 /* 2492 * SADB_SPDDUMP processing 2493 * receive 2494 * <base> 2495 * from the user, and dump all SP leaves 2496 * and send, 2497 * <base> ..... 2498 * to the ikmpd. 2499 * 2500 * m will always be freed. 2501 */ 2502 static int 2503 key_api_spddump(struct socket *so, struct mbuf *m0, 2504 const struct sadb_msghdr *mhp) 2505 { 2506 struct mbuf *n; 2507 int error, len; 2508 int ok, s; 2509 pid_t pid; 2510 2511 pid = mhp->msg->sadb_msg_pid; 2512 /* 2513 * If the requestor has insufficient socket-buffer space 2514 * for the entire chain, nobody gets any response to the DUMP. 2515 * XXX For now, only the requestor ever gets anything. 2516 * Moreover, if the requestor has any space at all, they receive 2517 * the entire chain, otherwise the request is refused with ENOBUFS. 2518 */ 2519 if (sbspace(&so->so_rcv) <= 0) { 2520 return key_senderror(so, m0, ENOBUFS); 2521 } 2522 2523 s = splsoftnet(); 2524 n = key_setspddump_chain(&error, &len, pid); 2525 splx(s); 2526 2527 if (n == NULL) { 2528 return key_senderror(so, m0, ENOENT); 2529 } 2530 { 2531 uint64_t *ps = PFKEY_STAT_GETREF(); 2532 ps[PFKEY_STAT_IN_TOTAL]++; 2533 ps[PFKEY_STAT_IN_BYTES] += len; 2534 PFKEY_STAT_PUTREF(); 2535 } 2536 2537 /* 2538 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2539 * The requestor receives either the entire chain, or an 2540 * error message with ENOBUFS. 2541 */ 2542 2543 /* 2544 * sbappendchainwith record takes the chain of entries, one 2545 * packet-record per SPD entry, prepends the key_src sockaddr 2546 * to each packet-record, links the sockaddr mbufs into a new 2547 * list of records, then appends the entire resulting 2548 * list to the requesting socket. 2549 */ 2550 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 2551 SB_PRIO_ONESHOT_OVERFLOW); 2552 2553 if (!ok) { 2554 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2555 m_freem(n); 2556 return key_senderror(so, m0, ENOBUFS); 2557 } 2558 2559 m_freem(m0); 2560 return error; 2561 } 2562 2563 /* 2564 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2565 */ 2566 static int 2567 key_api_nat_map(struct socket *so, struct mbuf *m, 2568 const struct sadb_msghdr *mhp) 2569 { 2570 struct sadb_x_nat_t_type *type; 2571 struct sadb_x_nat_t_port *sport; 2572 struct sadb_x_nat_t_port *dport; 2573 struct sadb_address *iaddr, *raddr; 2574 struct sadb_x_nat_t_frag *frag; 2575 2576 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2577 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2578 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2579 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2580 return key_senderror(so, m, EINVAL); 2581 } 2582 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2583 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2584 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2585 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2586 return key_senderror(so, m, EINVAL); 2587 } 2588 2589 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2590 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2591 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2592 return key_senderror(so, m, EINVAL); 2593 } 2594 2595 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2596 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2597 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2598 return key_senderror(so, m, EINVAL); 2599 } 2600 2601 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2602 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2603 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2604 return key_senderror(so, m, EINVAL); 2605 } 2606 2607 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2608 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2609 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2610 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2611 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2612 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2613 2614 /* 2615 * XXX handle that, it should also contain a SA, or anything 2616 * that enable to update the SA information. 2617 */ 2618 2619 return 0; 2620 } 2621 2622 static struct mbuf * 2623 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2624 { 2625 struct mbuf *result = NULL, *m; 2626 2627 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2628 if (!m) 2629 goto fail; 2630 result = m; 2631 2632 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2633 &sp->spidx.src.sa, sp->spidx.prefs, sp->spidx.ul_proto); 2634 if (!m) 2635 goto fail; 2636 m_cat(result, m); 2637 2638 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2639 &sp->spidx.dst.sa, sp->spidx.prefd, sp->spidx.ul_proto); 2640 if (!m) 2641 goto fail; 2642 m_cat(result, m); 2643 2644 m = key_sp2msg(sp); 2645 if (!m) 2646 goto fail; 2647 m_cat(result, m); 2648 2649 if ((result->m_flags & M_PKTHDR) == 0) 2650 goto fail; 2651 2652 if (result->m_len < sizeof(struct sadb_msg)) { 2653 result = m_pullup(result, sizeof(struct sadb_msg)); 2654 if (result == NULL) 2655 goto fail; 2656 } 2657 2658 result->m_pkthdr.len = 0; 2659 for (m = result; m; m = m->m_next) 2660 result->m_pkthdr.len += m->m_len; 2661 2662 mtod(result, struct sadb_msg *)->sadb_msg_len = 2663 PFKEY_UNIT64(result->m_pkthdr.len); 2664 2665 return result; 2666 2667 fail: 2668 m_freem(result); 2669 return NULL; 2670 } 2671 2672 /* 2673 * get PFKEY message length for security policy and request. 2674 */ 2675 static u_int 2676 key_getspreqmsglen(const struct secpolicy *sp) 2677 { 2678 u_int tlen; 2679 2680 tlen = sizeof(struct sadb_x_policy); 2681 2682 /* if is the policy for ipsec ? */ 2683 if (sp->policy != IPSEC_POLICY_IPSEC) 2684 return tlen; 2685 2686 /* get length of ipsec requests */ 2687 { 2688 const struct ipsecrequest *isr; 2689 int len; 2690 2691 for (isr = sp->req; isr != NULL; isr = isr->next) { 2692 len = sizeof(struct sadb_x_ipsecrequest) 2693 + isr->saidx.src.sa.sa_len + isr->saidx.dst.sa.sa_len; 2694 2695 tlen += PFKEY_ALIGN8(len); 2696 } 2697 } 2698 2699 return tlen; 2700 } 2701 2702 /* 2703 * SADB_SPDEXPIRE processing 2704 * send 2705 * <base, address(SD), lifetime(CH), policy> 2706 * to KMD by PF_KEY. 2707 * 2708 * OUT: 0 : succeed 2709 * others : error number 2710 */ 2711 static int 2712 key_spdexpire(struct secpolicy *sp) 2713 { 2714 int s; 2715 struct mbuf *result = NULL, *m; 2716 int len; 2717 int error = -1; 2718 struct sadb_lifetime *lt; 2719 2720 /* XXX: Why do we lock ? */ 2721 s = splsoftnet(); /*called from softclock()*/ 2722 2723 KASSERT(sp != NULL); 2724 2725 /* set msg header */ 2726 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2727 if (!m) { 2728 error = ENOBUFS; 2729 goto fail; 2730 } 2731 result = m; 2732 2733 /* create lifetime extension (current and hard) */ 2734 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2735 m = key_alloc_mbuf(len); 2736 if (!m || m->m_next) { /*XXX*/ 2737 if (m) 2738 m_freem(m); 2739 error = ENOBUFS; 2740 goto fail; 2741 } 2742 memset(mtod(m, void *), 0, len); 2743 lt = mtod(m, struct sadb_lifetime *); 2744 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2745 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2746 lt->sadb_lifetime_allocations = 0; 2747 lt->sadb_lifetime_bytes = 0; 2748 lt->sadb_lifetime_addtime = time_mono_to_wall(sp->created); 2749 lt->sadb_lifetime_usetime = time_mono_to_wall(sp->lastused); 2750 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2751 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2752 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2753 lt->sadb_lifetime_allocations = 0; 2754 lt->sadb_lifetime_bytes = 0; 2755 lt->sadb_lifetime_addtime = sp->lifetime; 2756 lt->sadb_lifetime_usetime = sp->validtime; 2757 m_cat(result, m); 2758 2759 /* set sadb_address for source */ 2760 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sp->spidx.src.sa, 2761 sp->spidx.prefs, sp->spidx.ul_proto); 2762 if (!m) { 2763 error = ENOBUFS; 2764 goto fail; 2765 } 2766 m_cat(result, m); 2767 2768 /* set sadb_address for destination */ 2769 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sp->spidx.dst.sa, 2770 sp->spidx.prefd, sp->spidx.ul_proto); 2771 if (!m) { 2772 error = ENOBUFS; 2773 goto fail; 2774 } 2775 m_cat(result, m); 2776 2777 /* set secpolicy */ 2778 m = key_sp2msg(sp); 2779 if (!m) { 2780 error = ENOBUFS; 2781 goto fail; 2782 } 2783 m_cat(result, m); 2784 2785 if ((result->m_flags & M_PKTHDR) == 0) { 2786 error = EINVAL; 2787 goto fail; 2788 } 2789 2790 if (result->m_len < sizeof(struct sadb_msg)) { 2791 result = m_pullup(result, sizeof(struct sadb_msg)); 2792 if (result == NULL) { 2793 error = ENOBUFS; 2794 goto fail; 2795 } 2796 } 2797 2798 result->m_pkthdr.len = 0; 2799 for (m = result; m; m = m->m_next) 2800 result->m_pkthdr.len += m->m_len; 2801 2802 mtod(result, struct sadb_msg *)->sadb_msg_len = 2803 PFKEY_UNIT64(result->m_pkthdr.len); 2804 2805 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2806 2807 fail: 2808 if (result) 2809 m_freem(result); 2810 splx(s); 2811 return error; 2812 } 2813 2814 /* %%% SAD management */ 2815 /* 2816 * allocating a memory for new SA head, and copy from the values of mhp. 2817 * OUT: NULL : failure due to the lack of memory. 2818 * others : pointer to new SA head. 2819 */ 2820 static struct secashead * 2821 key_newsah(const struct secasindex *saidx) 2822 { 2823 struct secashead *newsah; 2824 int i; 2825 2826 KASSERT(saidx != NULL); 2827 2828 newsah = kmem_zalloc(sizeof(struct secashead), KM_SLEEP); 2829 for (i = 0; i < __arraycount(newsah->savtree); i++) 2830 LIST_INIT(&newsah->savtree[i]); 2831 newsah->saidx = *saidx; 2832 2833 /* add to saidxtree */ 2834 newsah->state = SADB_SASTATE_MATURE; 2835 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2836 2837 return newsah; 2838 } 2839 2840 /* 2841 * delete SA index and all SA registerd. 2842 */ 2843 static void 2844 key_delsah(struct secashead *sah) 2845 { 2846 struct secasvar *sav; 2847 u_int state; 2848 int s; 2849 int zombie = 0; 2850 2851 KASSERT(!cpu_softintr_p()); 2852 KASSERT(sah != NULL); 2853 2854 s = splsoftnet(); 2855 2856 /* searching all SA registerd in the secindex. */ 2857 SASTATE_ANY_FOREACH(state) { 2858 LIST_FOREACH(sav, &sah->savtree[state], chain) { 2859 /* give up to delete this sa */ 2860 zombie++; 2861 } 2862 } 2863 2864 /* don't delete sah only if there are savs. */ 2865 if (zombie) { 2866 splx(s); 2867 return; 2868 } 2869 2870 rtcache_free(&sah->sa_route); 2871 2872 /* remove from tree of SA index */ 2873 KASSERT(__LIST_CHAINED(sah)); 2874 LIST_REMOVE(sah, chain); 2875 2876 if (sah->idents != NULL) 2877 kmem_free(sah->idents, sah->idents_len); 2878 if (sah->identd != NULL) 2879 kmem_free(sah->identd, sah->identd_len); 2880 2881 kmem_free(sah, sizeof(*sah)); 2882 2883 splx(s); 2884 return; 2885 } 2886 2887 /* 2888 * allocating a new SA with LARVAL state. 2889 * key_api_add() and key_api_getspi() call, 2890 * and copy the values of mhp into new buffer. 2891 * When SAD message type is GETSPI: 2892 * to set sequence number from acq_seq++, 2893 * to set zero to SPI. 2894 * not to call key_setsava(). 2895 * OUT: NULL : fail 2896 * others : pointer to new secasvar. 2897 * 2898 * does not modify mbuf. does not free mbuf on error. 2899 */ 2900 static struct secasvar * 2901 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2902 int *errp, const char* where, int tag) 2903 { 2904 struct secasvar *newsav; 2905 const struct sadb_sa *xsa; 2906 2907 KASSERT(!cpu_softintr_p()); 2908 KASSERT(m != NULL); 2909 KASSERT(mhp != NULL); 2910 KASSERT(mhp->msg != NULL); 2911 2912 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 2913 2914 switch (mhp->msg->sadb_msg_type) { 2915 case SADB_GETSPI: 2916 newsav->spi = 0; 2917 2918 #ifdef IPSEC_DOSEQCHECK 2919 /* sync sequence number */ 2920 if (mhp->msg->sadb_msg_seq == 0) 2921 newsav->seq = 2922 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2923 else 2924 #endif 2925 newsav->seq = mhp->msg->sadb_msg_seq; 2926 break; 2927 2928 case SADB_ADD: 2929 /* sanity check */ 2930 if (mhp->ext[SADB_EXT_SA] == NULL) { 2931 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2932 *errp = EINVAL; 2933 goto error; 2934 } 2935 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2936 newsav->spi = xsa->sadb_sa_spi; 2937 newsav->seq = mhp->msg->sadb_msg_seq; 2938 break; 2939 default: 2940 *errp = EINVAL; 2941 goto error; 2942 } 2943 2944 /* copy sav values */ 2945 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2946 *errp = key_setsaval(newsav, m, mhp); 2947 if (*errp) 2948 goto error; 2949 } 2950 2951 /* reset created */ 2952 newsav->created = time_uptime; 2953 newsav->pid = mhp->msg->sadb_msg_pid; 2954 2955 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 2956 "DP from %s:%u return SA:%p\n", where, tag, newsav); 2957 return newsav; 2958 2959 error: 2960 KASSERT(*errp != 0); 2961 kmem_free(newsav, sizeof(*newsav)); 2962 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 2963 "DP from %s:%u return SA:NULL\n", where, tag); 2964 return NULL; 2965 } 2966 2967 2968 static void 2969 key_clear_xform(struct secasvar *sav) 2970 { 2971 2972 /* 2973 * Cleanup xform state. Note that zeroize'ing causes the 2974 * keys to be cleared; otherwise we must do it ourself. 2975 */ 2976 if (sav->tdb_xform != NULL) { 2977 sav->tdb_xform->xf_zeroize(sav); 2978 sav->tdb_xform = NULL; 2979 } else { 2980 if (sav->key_auth != NULL) 2981 explicit_memset(_KEYBUF(sav->key_auth), 0, 2982 _KEYLEN(sav->key_auth)); 2983 if (sav->key_enc != NULL) 2984 explicit_memset(_KEYBUF(sav->key_enc), 0, 2985 _KEYLEN(sav->key_enc)); 2986 } 2987 } 2988 2989 /* 2990 * free() SA variable entry. 2991 */ 2992 static void 2993 key_delsav(struct secasvar *sav) 2994 { 2995 2996 KASSERT(sav != NULL); 2997 KASSERTMSG(sav->refcnt == 0, "reference count %u > 0", sav->refcnt); 2998 2999 key_clear_xform(sav); 3000 key_freesaval(sav); 3001 kmem_intr_free(sav, sizeof(*sav)); 3002 3003 return; 3004 } 3005 3006 /* 3007 * search SAD. 3008 * OUT: 3009 * NULL : not found 3010 * others : found, pointer to a SA. 3011 */ 3012 static struct secashead * 3013 key_getsah(const struct secasindex *saidx, int flag) 3014 { 3015 struct secashead *sah; 3016 3017 LIST_FOREACH(sah, &sahtree, chain) { 3018 if (sah->state == SADB_SASTATE_DEAD) 3019 continue; 3020 if (key_saidx_match(&sah->saidx, saidx, flag)) 3021 return sah; 3022 } 3023 3024 return NULL; 3025 } 3026 3027 /* 3028 * check not to be duplicated SPI. 3029 * NOTE: this function is too slow due to searching all SAD. 3030 * OUT: 3031 * NULL : not found 3032 * others : found, pointer to a SA. 3033 */ 3034 static bool 3035 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3036 { 3037 struct secashead *sah; 3038 struct secasvar *sav; 3039 3040 /* check address family */ 3041 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3042 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 3043 return false; 3044 } 3045 3046 /* check all SAD */ 3047 LIST_FOREACH(sah, &sahtree, chain) { 3048 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3049 continue; 3050 sav = key_getsavbyspi(sah, spi); 3051 if (sav != NULL) { 3052 KEY_FREESAV(&sav); 3053 return true; 3054 } 3055 } 3056 3057 return false; 3058 } 3059 3060 /* 3061 * search SAD litmited alive SA, protocol, SPI. 3062 * OUT: 3063 * NULL : not found 3064 * others : found, pointer to a SA. 3065 */ 3066 static struct secasvar * 3067 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3068 { 3069 struct secasvar *sav; 3070 u_int state; 3071 3072 /* search all status */ 3073 SASTATE_ALIVE_FOREACH(state) { 3074 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3075 3076 /* sanity check */ 3077 if (sav->state != state) { 3078 IPSECLOG(LOG_DEBUG, 3079 "invalid sav->state (queue: %d SA: %d)\n", 3080 state, sav->state); 3081 continue; 3082 } 3083 3084 if (sav->spi == spi) { 3085 SA_ADDREF(sav); 3086 return sav; 3087 } 3088 } 3089 } 3090 3091 return NULL; 3092 } 3093 3094 /* 3095 * Free allocated data to member variables of sav: 3096 * sav->replay, sav->key_* and sav->lft_*. 3097 */ 3098 static void 3099 key_freesaval(struct secasvar *sav) 3100 { 3101 3102 KASSERT(sav->refcnt == 0); 3103 3104 if (sav->replay != NULL) 3105 kmem_intr_free(sav->replay, sav->replay_len); 3106 if (sav->key_auth != NULL) 3107 kmem_intr_free(sav->key_auth, sav->key_auth_len); 3108 if (sav->key_enc != NULL) 3109 kmem_intr_free(sav->key_enc, sav->key_enc_len); 3110 if (sav->lft_c != NULL) 3111 kmem_intr_free(sav->lft_c, sizeof(*(sav->lft_c))); 3112 if (sav->lft_h != NULL) 3113 kmem_intr_free(sav->lft_h, sizeof(*(sav->lft_h))); 3114 if (sav->lft_s != NULL) 3115 kmem_intr_free(sav->lft_s, sizeof(*(sav->lft_s))); 3116 } 3117 3118 /* 3119 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3120 * You must update these if need. 3121 * OUT: 0: success. 3122 * !0: failure. 3123 * 3124 * does not modify mbuf. does not free mbuf on error. 3125 */ 3126 static int 3127 key_setsaval(struct secasvar *sav, struct mbuf *m, 3128 const struct sadb_msghdr *mhp) 3129 { 3130 int error = 0; 3131 3132 KASSERT(!cpu_softintr_p()); 3133 KASSERT(m != NULL); 3134 KASSERT(mhp != NULL); 3135 KASSERT(mhp->msg != NULL); 3136 3137 /* We shouldn't initialize sav variables while someone uses it. */ 3138 KASSERT(sav->refcnt == 0); 3139 3140 /* SA */ 3141 if (mhp->ext[SADB_EXT_SA] != NULL) { 3142 const struct sadb_sa *sa0; 3143 3144 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3145 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3146 error = EINVAL; 3147 goto fail; 3148 } 3149 3150 sav->alg_auth = sa0->sadb_sa_auth; 3151 sav->alg_enc = sa0->sadb_sa_encrypt; 3152 sav->flags = sa0->sadb_sa_flags; 3153 3154 /* replay window */ 3155 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3156 size_t len = sizeof(struct secreplay) + 3157 sa0->sadb_sa_replay; 3158 sav->replay = kmem_zalloc(len, KM_SLEEP); 3159 sav->replay_len = len; 3160 if (sa0->sadb_sa_replay != 0) 3161 sav->replay->bitmap = (char*)(sav->replay+1); 3162 sav->replay->wsize = sa0->sadb_sa_replay; 3163 } 3164 } 3165 3166 /* Authentication keys */ 3167 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3168 const struct sadb_key *key0; 3169 int len; 3170 3171 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3172 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3173 3174 error = 0; 3175 if (len < sizeof(*key0)) { 3176 error = EINVAL; 3177 goto fail; 3178 } 3179 switch (mhp->msg->sadb_msg_satype) { 3180 case SADB_SATYPE_AH: 3181 case SADB_SATYPE_ESP: 3182 case SADB_X_SATYPE_TCPSIGNATURE: 3183 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3184 sav->alg_auth != SADB_X_AALG_NULL) 3185 error = EINVAL; 3186 break; 3187 case SADB_X_SATYPE_IPCOMP: 3188 default: 3189 error = EINVAL; 3190 break; 3191 } 3192 if (error) { 3193 IPSECLOG(LOG_DEBUG, "invalid key_auth values.\n"); 3194 goto fail; 3195 } 3196 3197 sav->key_auth = key_newbuf(key0, len); 3198 sav->key_auth_len = len; 3199 } 3200 3201 /* Encryption key */ 3202 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3203 const struct sadb_key *key0; 3204 int len; 3205 3206 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3207 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3208 3209 error = 0; 3210 if (len < sizeof(*key0)) { 3211 error = EINVAL; 3212 goto fail; 3213 } 3214 switch (mhp->msg->sadb_msg_satype) { 3215 case SADB_SATYPE_ESP: 3216 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3217 sav->alg_enc != SADB_EALG_NULL) { 3218 error = EINVAL; 3219 break; 3220 } 3221 sav->key_enc = key_newbuf(key0, len); 3222 sav->key_enc_len = len; 3223 break; 3224 case SADB_X_SATYPE_IPCOMP: 3225 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3226 error = EINVAL; 3227 sav->key_enc = NULL; /*just in case*/ 3228 break; 3229 case SADB_SATYPE_AH: 3230 case SADB_X_SATYPE_TCPSIGNATURE: 3231 default: 3232 error = EINVAL; 3233 break; 3234 } 3235 if (error) { 3236 IPSECLOG(LOG_DEBUG, "invalid key_enc value.\n"); 3237 goto fail; 3238 } 3239 } 3240 3241 /* set iv */ 3242 sav->ivlen = 0; 3243 3244 switch (mhp->msg->sadb_msg_satype) { 3245 case SADB_SATYPE_AH: 3246 error = xform_init(sav, XF_AH); 3247 break; 3248 case SADB_SATYPE_ESP: 3249 error = xform_init(sav, XF_ESP); 3250 break; 3251 case SADB_X_SATYPE_IPCOMP: 3252 error = xform_init(sav, XF_IPCOMP); 3253 break; 3254 case SADB_X_SATYPE_TCPSIGNATURE: 3255 error = xform_init(sav, XF_TCPSIGNATURE); 3256 break; 3257 } 3258 if (error) { 3259 IPSECLOG(LOG_DEBUG, "unable to initialize SA type %u.\n", 3260 mhp->msg->sadb_msg_satype); 3261 goto fail; 3262 } 3263 3264 /* reset created */ 3265 sav->created = time_uptime; 3266 3267 /* make lifetime for CURRENT */ 3268 sav->lft_c = kmem_alloc(sizeof(struct sadb_lifetime), KM_SLEEP); 3269 3270 sav->lft_c->sadb_lifetime_len = 3271 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3272 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3273 sav->lft_c->sadb_lifetime_allocations = 0; 3274 sav->lft_c->sadb_lifetime_bytes = 0; 3275 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3276 sav->lft_c->sadb_lifetime_usetime = 0; 3277 3278 /* lifetimes for HARD and SOFT */ 3279 { 3280 const struct sadb_lifetime *lft0; 3281 3282 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3283 if (lft0 != NULL) { 3284 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3285 error = EINVAL; 3286 goto fail; 3287 } 3288 sav->lft_h = key_newbuf(lft0, sizeof(*lft0)); 3289 } 3290 3291 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3292 if (lft0 != NULL) { 3293 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3294 error = EINVAL; 3295 goto fail; 3296 } 3297 sav->lft_s = key_newbuf(lft0, sizeof(*lft0)); 3298 /* to be initialize ? */ 3299 } 3300 } 3301 3302 return 0; 3303 3304 fail: 3305 key_clear_xform(sav); 3306 key_freesaval(sav); 3307 3308 return error; 3309 } 3310 3311 /* 3312 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3313 * OUT: 0: valid 3314 * other: errno 3315 */ 3316 static int 3317 key_init_xform(struct secasvar *sav) 3318 { 3319 int error; 3320 3321 /* We shouldn't initialize sav variables while someone uses it. */ 3322 KASSERT(sav->refcnt == 0); 3323 3324 /* check SPI value */ 3325 switch (sav->sah->saidx.proto) { 3326 case IPPROTO_ESP: 3327 case IPPROTO_AH: 3328 if (ntohl(sav->spi) <= 255) { 3329 IPSECLOG(LOG_DEBUG, "illegal range of SPI %u.\n", 3330 (u_int32_t)ntohl(sav->spi)); 3331 return EINVAL; 3332 } 3333 break; 3334 } 3335 3336 /* check satype */ 3337 switch (sav->sah->saidx.proto) { 3338 case IPPROTO_ESP: 3339 /* check flags */ 3340 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3341 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3342 IPSECLOG(LOG_DEBUG, 3343 "invalid flag (derived) given to old-esp.\n"); 3344 return EINVAL; 3345 } 3346 error = xform_init(sav, XF_ESP); 3347 break; 3348 case IPPROTO_AH: 3349 /* check flags */ 3350 if (sav->flags & SADB_X_EXT_DERIV) { 3351 IPSECLOG(LOG_DEBUG, 3352 "invalid flag (derived) given to AH SA.\n"); 3353 return EINVAL; 3354 } 3355 if (sav->alg_enc != SADB_EALG_NONE) { 3356 IPSECLOG(LOG_DEBUG, 3357 "protocol and algorithm mismated.\n"); 3358 return(EINVAL); 3359 } 3360 error = xform_init(sav, XF_AH); 3361 break; 3362 case IPPROTO_IPCOMP: 3363 if (sav->alg_auth != SADB_AALG_NONE) { 3364 IPSECLOG(LOG_DEBUG, 3365 "protocol and algorithm mismated.\n"); 3366 return(EINVAL); 3367 } 3368 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3369 && ntohl(sav->spi) >= 0x10000) { 3370 IPSECLOG(LOG_DEBUG, "invalid cpi for IPComp.\n"); 3371 return(EINVAL); 3372 } 3373 error = xform_init(sav, XF_IPCOMP); 3374 break; 3375 case IPPROTO_TCP: 3376 if (sav->alg_enc != SADB_EALG_NONE) { 3377 IPSECLOG(LOG_DEBUG, 3378 "protocol and algorithm mismated.\n"); 3379 return(EINVAL); 3380 } 3381 error = xform_init(sav, XF_TCPSIGNATURE); 3382 break; 3383 default: 3384 IPSECLOG(LOG_DEBUG, "Invalid satype.\n"); 3385 error = EPROTONOSUPPORT; 3386 break; 3387 } 3388 3389 return error; 3390 } 3391 3392 /* 3393 * subroutine for SADB_GET and SADB_DUMP. 3394 */ 3395 static struct mbuf * 3396 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3397 u_int32_t seq, u_int32_t pid) 3398 { 3399 struct mbuf *result = NULL, *tres = NULL, *m; 3400 int l = 0; 3401 int i; 3402 void *p; 3403 struct sadb_lifetime lt; 3404 int dumporder[] = { 3405 SADB_EXT_SA, SADB_X_EXT_SA2, 3406 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3407 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3408 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3409 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3410 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3411 SADB_X_EXT_NAT_T_TYPE, 3412 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3413 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3414 SADB_X_EXT_NAT_T_FRAG, 3415 3416 }; 3417 3418 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3419 if (m == NULL) 3420 goto fail; 3421 result = m; 3422 3423 for (i = __arraycount(dumporder) - 1; i >= 0; i--) { 3424 m = NULL; 3425 p = NULL; 3426 switch (dumporder[i]) { 3427 case SADB_EXT_SA: 3428 m = key_setsadbsa(sav); 3429 break; 3430 3431 case SADB_X_EXT_SA2: 3432 m = key_setsadbxsa2(sav->sah->saidx.mode, 3433 sav->replay ? sav->replay->count : 0, 3434 sav->sah->saidx.reqid); 3435 break; 3436 3437 case SADB_EXT_ADDRESS_SRC: 3438 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3439 &sav->sah->saidx.src.sa, 3440 FULLMASK, IPSEC_ULPROTO_ANY); 3441 break; 3442 3443 case SADB_EXT_ADDRESS_DST: 3444 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3445 &sav->sah->saidx.dst.sa, 3446 FULLMASK, IPSEC_ULPROTO_ANY); 3447 break; 3448 3449 case SADB_EXT_KEY_AUTH: 3450 if (!sav->key_auth) 3451 continue; 3452 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3453 p = sav->key_auth; 3454 break; 3455 3456 case SADB_EXT_KEY_ENCRYPT: 3457 if (!sav->key_enc) 3458 continue; 3459 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3460 p = sav->key_enc; 3461 break; 3462 3463 case SADB_EXT_LIFETIME_CURRENT: 3464 KASSERT(sav->lft_c != NULL); 3465 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3466 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3467 lt.sadb_lifetime_addtime = 3468 time_mono_to_wall(lt.sadb_lifetime_addtime); 3469 lt.sadb_lifetime_usetime = 3470 time_mono_to_wall(lt.sadb_lifetime_usetime); 3471 p = < 3472 break; 3473 3474 case SADB_EXT_LIFETIME_HARD: 3475 if (!sav->lft_h) 3476 continue; 3477 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3478 p = sav->lft_h; 3479 break; 3480 3481 case SADB_EXT_LIFETIME_SOFT: 3482 if (!sav->lft_s) 3483 continue; 3484 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3485 p = sav->lft_s; 3486 break; 3487 3488 case SADB_X_EXT_NAT_T_TYPE: 3489 m = key_setsadbxtype(sav->natt_type); 3490 break; 3491 3492 case SADB_X_EXT_NAT_T_DPORT: 3493 if (sav->natt_type == 0) 3494 continue; 3495 m = key_setsadbxport( 3496 key_portfromsaddr(&sav->sah->saidx.dst), 3497 SADB_X_EXT_NAT_T_DPORT); 3498 break; 3499 3500 case SADB_X_EXT_NAT_T_SPORT: 3501 if (sav->natt_type == 0) 3502 continue; 3503 m = key_setsadbxport( 3504 key_portfromsaddr(&sav->sah->saidx.src), 3505 SADB_X_EXT_NAT_T_SPORT); 3506 break; 3507 3508 case SADB_X_EXT_NAT_T_FRAG: 3509 /* don't send frag info if not set */ 3510 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3511 continue; 3512 m = key_setsadbxfrag(sav->esp_frag); 3513 break; 3514 3515 case SADB_X_EXT_NAT_T_OAI: 3516 case SADB_X_EXT_NAT_T_OAR: 3517 continue; 3518 3519 case SADB_EXT_ADDRESS_PROXY: 3520 case SADB_EXT_IDENTITY_SRC: 3521 case SADB_EXT_IDENTITY_DST: 3522 /* XXX: should we brought from SPD ? */ 3523 case SADB_EXT_SENSITIVITY: 3524 default: 3525 continue; 3526 } 3527 3528 KASSERT(!(m && p)); 3529 if (!m && !p) 3530 goto fail; 3531 if (p && tres) { 3532 M_PREPEND(tres, l, M_DONTWAIT); 3533 if (!tres) 3534 goto fail; 3535 memcpy(mtod(tres, void *), p, l); 3536 continue; 3537 } 3538 if (p) { 3539 m = key_alloc_mbuf(l); 3540 if (!m) 3541 goto fail; 3542 m_copyback(m, 0, l, p); 3543 } 3544 3545 if (tres) 3546 m_cat(m, tres); 3547 tres = m; 3548 } 3549 3550 m_cat(result, tres); 3551 tres = NULL; /* avoid free on error below */ 3552 3553 if (result->m_len < sizeof(struct sadb_msg)) { 3554 result = m_pullup(result, sizeof(struct sadb_msg)); 3555 if (result == NULL) 3556 goto fail; 3557 } 3558 3559 result->m_pkthdr.len = 0; 3560 for (m = result; m; m = m->m_next) 3561 result->m_pkthdr.len += m->m_len; 3562 3563 mtod(result, struct sadb_msg *)->sadb_msg_len = 3564 PFKEY_UNIT64(result->m_pkthdr.len); 3565 3566 return result; 3567 3568 fail: 3569 m_freem(result); 3570 m_freem(tres); 3571 return NULL; 3572 } 3573 3574 3575 /* 3576 * set a type in sadb_x_nat_t_type 3577 */ 3578 static struct mbuf * 3579 key_setsadbxtype(u_int16_t type) 3580 { 3581 struct mbuf *m; 3582 size_t len; 3583 struct sadb_x_nat_t_type *p; 3584 3585 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3586 3587 m = key_alloc_mbuf(len); 3588 if (!m || m->m_next) { /*XXX*/ 3589 if (m) 3590 m_freem(m); 3591 return NULL; 3592 } 3593 3594 p = mtod(m, struct sadb_x_nat_t_type *); 3595 3596 memset(p, 0, len); 3597 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3598 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3599 p->sadb_x_nat_t_type_type = type; 3600 3601 return m; 3602 } 3603 /* 3604 * set a port in sadb_x_nat_t_port. port is in network order 3605 */ 3606 static struct mbuf * 3607 key_setsadbxport(u_int16_t port, u_int16_t type) 3608 { 3609 struct mbuf *m; 3610 size_t len; 3611 struct sadb_x_nat_t_port *p; 3612 3613 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3614 3615 m = key_alloc_mbuf(len); 3616 if (!m || m->m_next) { /*XXX*/ 3617 if (m) 3618 m_freem(m); 3619 return NULL; 3620 } 3621 3622 p = mtod(m, struct sadb_x_nat_t_port *); 3623 3624 memset(p, 0, len); 3625 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3626 p->sadb_x_nat_t_port_exttype = type; 3627 p->sadb_x_nat_t_port_port = port; 3628 3629 return m; 3630 } 3631 3632 /* 3633 * set fragmentation info in sadb_x_nat_t_frag 3634 */ 3635 static struct mbuf * 3636 key_setsadbxfrag(u_int16_t flen) 3637 { 3638 struct mbuf *m; 3639 size_t len; 3640 struct sadb_x_nat_t_frag *p; 3641 3642 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3643 3644 m = key_alloc_mbuf(len); 3645 if (!m || m->m_next) { /*XXX*/ 3646 if (m) 3647 m_freem(m); 3648 return NULL; 3649 } 3650 3651 p = mtod(m, struct sadb_x_nat_t_frag *); 3652 3653 memset(p, 0, len); 3654 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3655 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3656 p->sadb_x_nat_t_frag_fraglen = flen; 3657 3658 return m; 3659 } 3660 3661 /* 3662 * Get port from sockaddr, port is in network order 3663 */ 3664 u_int16_t 3665 key_portfromsaddr(const union sockaddr_union *saddr) 3666 { 3667 u_int16_t port; 3668 3669 switch (saddr->sa.sa_family) { 3670 case AF_INET: { 3671 port = saddr->sin.sin_port; 3672 break; 3673 } 3674 #ifdef INET6 3675 case AF_INET6: { 3676 port = saddr->sin6.sin6_port; 3677 break; 3678 } 3679 #endif 3680 default: 3681 printf("%s: unexpected address family\n", __func__); 3682 port = 0; 3683 break; 3684 } 3685 3686 return port; 3687 } 3688 3689 3690 /* 3691 * Set port is struct sockaddr. port is in network order 3692 */ 3693 static void 3694 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3695 { 3696 switch (saddr->sa.sa_family) { 3697 case AF_INET: { 3698 saddr->sin.sin_port = port; 3699 break; 3700 } 3701 #ifdef INET6 3702 case AF_INET6: { 3703 saddr->sin6.sin6_port = port; 3704 break; 3705 } 3706 #endif 3707 default: 3708 printf("%s: unexpected address family %d\n", __func__, 3709 saddr->sa.sa_family); 3710 break; 3711 } 3712 3713 return; 3714 } 3715 3716 /* 3717 * Safety check sa_len 3718 */ 3719 static int 3720 key_checksalen(const union sockaddr_union *saddr) 3721 { 3722 switch (saddr->sa.sa_family) { 3723 case AF_INET: 3724 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3725 return -1; 3726 break; 3727 #ifdef INET6 3728 case AF_INET6: 3729 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3730 return -1; 3731 break; 3732 #endif 3733 default: 3734 printf("%s: unexpected sa_family %d\n", __func__, 3735 saddr->sa.sa_family); 3736 return -1; 3737 break; 3738 } 3739 return 0; 3740 } 3741 3742 3743 /* 3744 * set data into sadb_msg. 3745 */ 3746 static struct mbuf * 3747 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3748 u_int32_t seq, pid_t pid, u_int16_t reserved) 3749 { 3750 struct mbuf *m; 3751 struct sadb_msg *p; 3752 int len; 3753 3754 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 3755 3756 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3757 3758 MGETHDR(m, M_DONTWAIT, MT_DATA); 3759 if (m && len > MHLEN) { 3760 MCLGET(m, M_DONTWAIT); 3761 if ((m->m_flags & M_EXT) == 0) { 3762 m_freem(m); 3763 m = NULL; 3764 } 3765 } 3766 if (!m) 3767 return NULL; 3768 m->m_pkthdr.len = m->m_len = len; 3769 m->m_next = NULL; 3770 3771 p = mtod(m, struct sadb_msg *); 3772 3773 memset(p, 0, len); 3774 p->sadb_msg_version = PF_KEY_V2; 3775 p->sadb_msg_type = type; 3776 p->sadb_msg_errno = 0; 3777 p->sadb_msg_satype = satype; 3778 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3779 p->sadb_msg_reserved = reserved; 3780 p->sadb_msg_seq = seq; 3781 p->sadb_msg_pid = (u_int32_t)pid; 3782 3783 return m; 3784 } 3785 3786 /* 3787 * copy secasvar data into sadb_address. 3788 */ 3789 static struct mbuf * 3790 key_setsadbsa(struct secasvar *sav) 3791 { 3792 struct mbuf *m; 3793 struct sadb_sa *p; 3794 int len; 3795 3796 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3797 m = key_alloc_mbuf(len); 3798 if (!m || m->m_next) { /*XXX*/ 3799 if (m) 3800 m_freem(m); 3801 return NULL; 3802 } 3803 3804 p = mtod(m, struct sadb_sa *); 3805 3806 memset(p, 0, len); 3807 p->sadb_sa_len = PFKEY_UNIT64(len); 3808 p->sadb_sa_exttype = SADB_EXT_SA; 3809 p->sadb_sa_spi = sav->spi; 3810 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3811 p->sadb_sa_state = sav->state; 3812 p->sadb_sa_auth = sav->alg_auth; 3813 p->sadb_sa_encrypt = sav->alg_enc; 3814 p->sadb_sa_flags = sav->flags; 3815 3816 return m; 3817 } 3818 3819 /* 3820 * set data into sadb_address. 3821 */ 3822 static struct mbuf * 3823 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3824 u_int8_t prefixlen, u_int16_t ul_proto) 3825 { 3826 struct mbuf *m; 3827 struct sadb_address *p; 3828 size_t len; 3829 3830 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3831 PFKEY_ALIGN8(saddr->sa_len); 3832 m = key_alloc_mbuf(len); 3833 if (!m || m->m_next) { /*XXX*/ 3834 if (m) 3835 m_freem(m); 3836 return NULL; 3837 } 3838 3839 p = mtod(m, struct sadb_address *); 3840 3841 memset(p, 0, len); 3842 p->sadb_address_len = PFKEY_UNIT64(len); 3843 p->sadb_address_exttype = exttype; 3844 p->sadb_address_proto = ul_proto; 3845 if (prefixlen == FULLMASK) { 3846 switch (saddr->sa_family) { 3847 case AF_INET: 3848 prefixlen = sizeof(struct in_addr) << 3; 3849 break; 3850 case AF_INET6: 3851 prefixlen = sizeof(struct in6_addr) << 3; 3852 break; 3853 default: 3854 ; /*XXX*/ 3855 } 3856 } 3857 p->sadb_address_prefixlen = prefixlen; 3858 p->sadb_address_reserved = 0; 3859 3860 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3861 saddr, saddr->sa_len); 3862 3863 return m; 3864 } 3865 3866 #if 0 3867 /* 3868 * set data into sadb_ident. 3869 */ 3870 static struct mbuf * 3871 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3872 void *string, int stringlen, u_int64_t id) 3873 { 3874 struct mbuf *m; 3875 struct sadb_ident *p; 3876 size_t len; 3877 3878 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3879 m = key_alloc_mbuf(len); 3880 if (!m || m->m_next) { /*XXX*/ 3881 if (m) 3882 m_freem(m); 3883 return NULL; 3884 } 3885 3886 p = mtod(m, struct sadb_ident *); 3887 3888 memset(p, 0, len); 3889 p->sadb_ident_len = PFKEY_UNIT64(len); 3890 p->sadb_ident_exttype = exttype; 3891 p->sadb_ident_type = idtype; 3892 p->sadb_ident_reserved = 0; 3893 p->sadb_ident_id = id; 3894 3895 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3896 string, stringlen); 3897 3898 return m; 3899 } 3900 #endif 3901 3902 /* 3903 * set data into sadb_x_sa2. 3904 */ 3905 static struct mbuf * 3906 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 3907 { 3908 struct mbuf *m; 3909 struct sadb_x_sa2 *p; 3910 size_t len; 3911 3912 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3913 m = key_alloc_mbuf(len); 3914 if (!m || m->m_next) { /*XXX*/ 3915 if (m) 3916 m_freem(m); 3917 return NULL; 3918 } 3919 3920 p = mtod(m, struct sadb_x_sa2 *); 3921 3922 memset(p, 0, len); 3923 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3924 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3925 p->sadb_x_sa2_mode = mode; 3926 p->sadb_x_sa2_reserved1 = 0; 3927 p->sadb_x_sa2_reserved2 = 0; 3928 p->sadb_x_sa2_sequence = seq; 3929 p->sadb_x_sa2_reqid = reqid; 3930 3931 return m; 3932 } 3933 3934 /* 3935 * set data into sadb_x_policy 3936 */ 3937 static struct mbuf * 3938 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3939 { 3940 struct mbuf *m; 3941 struct sadb_x_policy *p; 3942 size_t len; 3943 3944 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3945 m = key_alloc_mbuf(len); 3946 if (!m || m->m_next) { /*XXX*/ 3947 if (m) 3948 m_freem(m); 3949 return NULL; 3950 } 3951 3952 p = mtod(m, struct sadb_x_policy *); 3953 3954 memset(p, 0, len); 3955 p->sadb_x_policy_len = PFKEY_UNIT64(len); 3956 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3957 p->sadb_x_policy_type = type; 3958 p->sadb_x_policy_dir = dir; 3959 p->sadb_x_policy_id = id; 3960 3961 return m; 3962 } 3963 3964 /* %%% utilities */ 3965 /* 3966 * copy a buffer into the new buffer allocated. 3967 */ 3968 static void * 3969 key_newbuf(const void *src, u_int len) 3970 { 3971 void *new; 3972 3973 new = kmem_alloc(len, KM_SLEEP); 3974 memcpy(new, src, len); 3975 3976 return new; 3977 } 3978 3979 /* compare my own address 3980 * OUT: 1: true, i.e. my address. 3981 * 0: false 3982 */ 3983 int 3984 key_ismyaddr(const struct sockaddr *sa) 3985 { 3986 #ifdef INET 3987 const struct sockaddr_in *sin; 3988 const struct in_ifaddr *ia; 3989 int s; 3990 #endif 3991 3992 KASSERT(sa != NULL); 3993 3994 switch (sa->sa_family) { 3995 #ifdef INET 3996 case AF_INET: 3997 sin = (const struct sockaddr_in *)sa; 3998 s = pserialize_read_enter(); 3999 IN_ADDRLIST_READER_FOREACH(ia) { 4000 if (sin->sin_family == ia->ia_addr.sin_family && 4001 sin->sin_len == ia->ia_addr.sin_len && 4002 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4003 { 4004 pserialize_read_exit(s); 4005 return 1; 4006 } 4007 } 4008 pserialize_read_exit(s); 4009 break; 4010 #endif 4011 #ifdef INET6 4012 case AF_INET6: 4013 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4014 #endif 4015 } 4016 4017 return 0; 4018 } 4019 4020 #ifdef INET6 4021 /* 4022 * compare my own address for IPv6. 4023 * 1: ours 4024 * 0: other 4025 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4026 */ 4027 #include <netinet6/in6_var.h> 4028 4029 static int 4030 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4031 { 4032 struct in6_ifaddr *ia; 4033 int s; 4034 struct psref psref; 4035 int bound; 4036 int ours = 1; 4037 4038 bound = curlwp_bind(); 4039 s = pserialize_read_enter(); 4040 IN6_ADDRLIST_READER_FOREACH(ia) { 4041 bool ingroup; 4042 4043 if (key_sockaddr_match((const struct sockaddr *)&sin6, 4044 (const struct sockaddr *)&ia->ia_addr, 0)) { 4045 pserialize_read_exit(s); 4046 goto ours; 4047 } 4048 ia6_acquire(ia, &psref); 4049 pserialize_read_exit(s); 4050 4051 /* 4052 * XXX Multicast 4053 * XXX why do we care about multlicast here while we don't care 4054 * about IPv4 multicast?? 4055 * XXX scope 4056 */ 4057 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4058 if (ingroup) { 4059 ia6_release(ia, &psref); 4060 goto ours; 4061 } 4062 4063 s = pserialize_read_enter(); 4064 ia6_release(ia, &psref); 4065 } 4066 pserialize_read_exit(s); 4067 4068 /* loopback, just for safety */ 4069 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4070 goto ours; 4071 4072 ours = 0; 4073 ours: 4074 curlwp_bindx(bound); 4075 4076 return ours; 4077 } 4078 #endif /*INET6*/ 4079 4080 /* 4081 * compare two secasindex structure. 4082 * flag can specify to compare 2 saidxes. 4083 * compare two secasindex structure without both mode and reqid. 4084 * don't compare port. 4085 * IN: 4086 * saidx0: source, it can be in SAD. 4087 * saidx1: object. 4088 * OUT: 4089 * 1 : equal 4090 * 0 : not equal 4091 */ 4092 static int 4093 key_saidx_match( 4094 const struct secasindex *saidx0, 4095 const struct secasindex *saidx1, 4096 int flag) 4097 { 4098 int chkport; 4099 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4100 4101 KASSERT(saidx0 != NULL); 4102 KASSERT(saidx1 != NULL); 4103 4104 /* sanity */ 4105 if (saidx0->proto != saidx1->proto) 4106 return 0; 4107 4108 if (flag == CMP_EXACTLY) { 4109 if (saidx0->mode != saidx1->mode) 4110 return 0; 4111 if (saidx0->reqid != saidx1->reqid) 4112 return 0; 4113 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4114 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4115 return 0; 4116 } else { 4117 4118 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4119 if (flag == CMP_MODE_REQID ||flag == CMP_REQID) { 4120 /* 4121 * If reqid of SPD is non-zero, unique SA is required. 4122 * The result must be of same reqid in this case. 4123 */ 4124 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4125 return 0; 4126 } 4127 4128 if (flag == CMP_MODE_REQID) { 4129 if (saidx0->mode != IPSEC_MODE_ANY && 4130 saidx0->mode != saidx1->mode) 4131 return 0; 4132 } 4133 4134 4135 sa0src = &saidx0->src.sa; 4136 sa0dst = &saidx0->dst.sa; 4137 sa1src = &saidx1->src.sa; 4138 sa1dst = &saidx1->dst.sa; 4139 /* 4140 * If NAT-T is enabled, check ports for tunnel mode. 4141 * Don't do it for transport mode, as there is no 4142 * port information available in the SP. 4143 * Also don't check ports if they are set to zero 4144 * in the SPD: This means we have a non-generated 4145 * SPD which can't know UDP ports. 4146 */ 4147 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4148 chkport = PORT_LOOSE; 4149 else 4150 chkport = PORT_NONE; 4151 4152 if (!key_sockaddr_match(sa0src, sa1src, chkport)) { 4153 return 0; 4154 } 4155 if (!key_sockaddr_match(sa0dst, sa1dst, chkport)) { 4156 return 0; 4157 } 4158 } 4159 4160 return 1; 4161 } 4162 4163 /* 4164 * compare two secindex structure exactly. 4165 * IN: 4166 * spidx0: source, it is often in SPD. 4167 * spidx1: object, it is often from PFKEY message. 4168 * OUT: 4169 * 1 : equal 4170 * 0 : not equal 4171 */ 4172 static int 4173 key_spidx_match_exactly( 4174 const struct secpolicyindex *spidx0, 4175 const struct secpolicyindex *spidx1) 4176 { 4177 4178 KASSERT(spidx0 != NULL); 4179 KASSERT(spidx1 != NULL); 4180 4181 /* sanity */ 4182 if (spidx0->prefs != spidx1->prefs || 4183 spidx0->prefd != spidx1->prefd || 4184 spidx0->ul_proto != spidx1->ul_proto) 4185 return 0; 4186 4187 return key_sockaddr_match(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) && 4188 key_sockaddr_match(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT); 4189 } 4190 4191 /* 4192 * compare two secindex structure with mask. 4193 * IN: 4194 * spidx0: source, it is often in SPD. 4195 * spidx1: object, it is often from IP header. 4196 * OUT: 4197 * 1 : equal 4198 * 0 : not equal 4199 */ 4200 static int 4201 key_spidx_match_withmask( 4202 const struct secpolicyindex *spidx0, 4203 const struct secpolicyindex *spidx1) 4204 { 4205 4206 KASSERT(spidx0 != NULL); 4207 KASSERT(spidx1 != NULL); 4208 4209 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4210 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4211 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4212 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4213 return 0; 4214 4215 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4216 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY && 4217 spidx0->ul_proto != spidx1->ul_proto) 4218 return 0; 4219 4220 switch (spidx0->src.sa.sa_family) { 4221 case AF_INET: 4222 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY && 4223 spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4224 return 0; 4225 if (!key_bb_match_withmask(&spidx0->src.sin.sin_addr, 4226 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4227 return 0; 4228 break; 4229 case AF_INET6: 4230 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY && 4231 spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4232 return 0; 4233 /* 4234 * scope_id check. if sin6_scope_id is 0, we regard it 4235 * as a wildcard scope, which matches any scope zone ID. 4236 */ 4237 if (spidx0->src.sin6.sin6_scope_id && 4238 spidx1->src.sin6.sin6_scope_id && 4239 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4240 return 0; 4241 if (!key_bb_match_withmask(&spidx0->src.sin6.sin6_addr, 4242 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4243 return 0; 4244 break; 4245 default: 4246 /* XXX */ 4247 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4248 return 0; 4249 break; 4250 } 4251 4252 switch (spidx0->dst.sa.sa_family) { 4253 case AF_INET: 4254 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY && 4255 spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4256 return 0; 4257 if (!key_bb_match_withmask(&spidx0->dst.sin.sin_addr, 4258 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4259 return 0; 4260 break; 4261 case AF_INET6: 4262 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY && 4263 spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4264 return 0; 4265 /* 4266 * scope_id check. if sin6_scope_id is 0, we regard it 4267 * as a wildcard scope, which matches any scope zone ID. 4268 */ 4269 if (spidx0->src.sin6.sin6_scope_id && 4270 spidx1->src.sin6.sin6_scope_id && 4271 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4272 return 0; 4273 if (!key_bb_match_withmask(&spidx0->dst.sin6.sin6_addr, 4274 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4275 return 0; 4276 break; 4277 default: 4278 /* XXX */ 4279 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4280 return 0; 4281 break; 4282 } 4283 4284 /* XXX Do we check other field ? e.g. flowinfo */ 4285 4286 return 1; 4287 } 4288 4289 /* returns 0 on match */ 4290 static int 4291 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4292 { 4293 switch (howport) { 4294 case PORT_NONE: 4295 return 0; 4296 case PORT_LOOSE: 4297 if (port1 == 0 || port2 == 0) 4298 return 0; 4299 /*FALLTHROUGH*/ 4300 case PORT_STRICT: 4301 if (port1 != port2) { 4302 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4303 "port fail %d != %d\n", port1, port2); 4304 return 1; 4305 } 4306 return 0; 4307 default: 4308 KASSERT(0); 4309 return 1; 4310 } 4311 } 4312 4313 /* returns 1 on match */ 4314 static int 4315 key_sockaddr_match( 4316 const struct sockaddr *sa1, 4317 const struct sockaddr *sa2, 4318 int howport) 4319 { 4320 const struct sockaddr_in *sin1, *sin2; 4321 const struct sockaddr_in6 *sin61, *sin62; 4322 4323 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4324 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4325 "fam/len fail %d != %d || %d != %d\n", 4326 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4327 sa2->sa_len); 4328 return 0; 4329 } 4330 4331 switch (sa1->sa_family) { 4332 case AF_INET: 4333 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4334 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4335 "len fail %d != %zu\n", 4336 sa1->sa_len, sizeof(struct sockaddr_in)); 4337 return 0; 4338 } 4339 sin1 = (const struct sockaddr_in *)sa1; 4340 sin2 = (const struct sockaddr_in *)sa2; 4341 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4342 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4343 "addr fail %#x != %#x\n", 4344 sin1->sin_addr.s_addr, sin2->sin_addr.s_addr); 4345 return 0; 4346 } 4347 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4348 return 0; 4349 } 4350 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4351 "addr success %#x[%d] == %#x[%d]\n", 4352 sin1->sin_addr.s_addr, sin1->sin_port, 4353 sin2->sin_addr.s_addr, sin2->sin_port); 4354 break; 4355 case AF_INET6: 4356 sin61 = (const struct sockaddr_in6 *)sa1; 4357 sin62 = (const struct sockaddr_in6 *)sa2; 4358 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4359 return 0; /*EINVAL*/ 4360 4361 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4362 return 0; 4363 } 4364 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4365 return 0; 4366 } 4367 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4368 return 0; 4369 } 4370 break; 4371 default: 4372 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4373 return 0; 4374 break; 4375 } 4376 4377 return 1; 4378 } 4379 4380 /* 4381 * compare two buffers with mask. 4382 * IN: 4383 * addr1: source 4384 * addr2: object 4385 * bits: Number of bits to compare 4386 * OUT: 4387 * 1 : equal 4388 * 0 : not equal 4389 */ 4390 static int 4391 key_bb_match_withmask(const void *a1, const void *a2, u_int bits) 4392 { 4393 const unsigned char *p1 = a1; 4394 const unsigned char *p2 = a2; 4395 4396 /* XXX: This could be considerably faster if we compare a word 4397 * at a time, but it is complicated on LSB Endian machines */ 4398 4399 /* Handle null pointers */ 4400 if (p1 == NULL || p2 == NULL) 4401 return (p1 == p2); 4402 4403 while (bits >= 8) { 4404 if (*p1++ != *p2++) 4405 return 0; 4406 bits -= 8; 4407 } 4408 4409 if (bits > 0) { 4410 u_int8_t mask = ~((1<<(8-bits))-1); 4411 if ((*p1 & mask) != (*p2 & mask)) 4412 return 0; 4413 } 4414 return 1; /* Match! */ 4415 } 4416 4417 static void 4418 key_timehandler_spd(time_t now) 4419 { 4420 u_int dir; 4421 struct secpolicy *sp, *nextsp; 4422 4423 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4424 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 4425 if (sp->state == IPSEC_SPSTATE_DEAD) { 4426 key_sp_unlink(sp); /*XXX*/ 4427 4428 /* 'sp' dead; continue transfers to 4429 * 'sp = nextsp' 4430 */ 4431 continue; 4432 } 4433 4434 if (sp->lifetime == 0 && sp->validtime == 0) 4435 continue; 4436 4437 /* the deletion will occur next time */ 4438 if ((sp->lifetime && now - sp->created > sp->lifetime) || 4439 (sp->validtime && now - sp->lastused > sp->validtime)) { 4440 key_sp_dead(sp); 4441 key_spdexpire(sp); 4442 continue; 4443 } 4444 } 4445 } 4446 } 4447 4448 static void 4449 key_timehandler_sad(time_t now) 4450 { 4451 struct secashead *sah, *nextsah; 4452 struct secasvar *sav, *nextsav; 4453 4454 LIST_FOREACH_SAFE(sah, &sahtree, chain, nextsah) { 4455 /* if sah has been dead, then delete it and process next sah. */ 4456 if (sah->state == SADB_SASTATE_DEAD) { 4457 key_delsah(sah); 4458 continue; 4459 } 4460 4461 /* if LARVAL entry doesn't become MATURE, delete it. */ 4462 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], 4463 chain, nextsav) { 4464 if (now - sav->created > key_larval_lifetime) { 4465 KEY_FREESAV(&sav); 4466 } 4467 } 4468 4469 /* 4470 * check MATURE entry to start to send expire message 4471 * whether or not. 4472 */ 4473 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], 4474 chain, nextsav) { 4475 /* we don't need to check. */ 4476 if (sav->lft_s == NULL) 4477 continue; 4478 4479 /* sanity check */ 4480 KASSERT(sav->lft_c != NULL); 4481 4482 /* check SOFT lifetime */ 4483 if (sav->lft_s->sadb_lifetime_addtime != 0 && 4484 now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4485 /* 4486 * check SA to be used whether or not. 4487 * when SA hasn't been used, delete it. 4488 */ 4489 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4490 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4491 KEY_FREESAV(&sav); 4492 } else { 4493 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4494 /* 4495 * XXX If we keep to send expire 4496 * message in the status of 4497 * DYING. Do remove below code. 4498 */ 4499 key_expire(sav); 4500 } 4501 } 4502 /* check SOFT lifetime by bytes */ 4503 /* 4504 * XXX I don't know the way to delete this SA 4505 * when new SA is installed. Caution when it's 4506 * installed too big lifetime by time. 4507 */ 4508 else if (sav->lft_s->sadb_lifetime_bytes != 0 && 4509 sav->lft_s->sadb_lifetime_bytes < 4510 sav->lft_c->sadb_lifetime_bytes) { 4511 4512 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4513 /* 4514 * XXX If we keep to send expire 4515 * message in the status of 4516 * DYING. Do remove below code. 4517 */ 4518 key_expire(sav); 4519 } 4520 } 4521 4522 /* check DYING entry to change status to DEAD. */ 4523 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], 4524 chain, nextsav) { 4525 /* we don't need to check. */ 4526 if (sav->lft_h == NULL) 4527 continue; 4528 4529 /* sanity check */ 4530 KASSERT(sav->lft_c != NULL); 4531 4532 if (sav->lft_h->sadb_lifetime_addtime != 0 && 4533 now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4534 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4535 KEY_FREESAV(&sav); 4536 } 4537 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4538 else if (sav->lft_s != NULL 4539 && sav->lft_s->sadb_lifetime_addtime != 0 4540 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4541 /* 4542 * XXX: should be checked to be 4543 * installed the valid SA. 4544 */ 4545 4546 /* 4547 * If there is no SA then sending 4548 * expire message. 4549 */ 4550 key_expire(sav); 4551 } 4552 #endif 4553 /* check HARD lifetime by bytes */ 4554 else if (sav->lft_h->sadb_lifetime_bytes != 0 && 4555 sav->lft_h->sadb_lifetime_bytes < 4556 sav->lft_c->sadb_lifetime_bytes) { 4557 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4558 KEY_FREESAV(&sav); 4559 } 4560 } 4561 4562 /* delete entry in DEAD */ 4563 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], 4564 chain, nextsav) { 4565 /* sanity check */ 4566 if (sav->state != SADB_SASTATE_DEAD) { 4567 IPSECLOG(LOG_DEBUG, 4568 "invalid sav->state (queue: %d SA: %d): " 4569 "kill it anyway\n", 4570 SADB_SASTATE_DEAD, sav->state); 4571 } 4572 4573 /* 4574 * do not call key_freesav() here. 4575 * sav should already be freed, and sav->refcnt 4576 * shows other references to sav 4577 * (such as from SPD). 4578 */ 4579 } 4580 } 4581 } 4582 4583 static void 4584 key_timehandler_acq(time_t now) 4585 { 4586 #ifndef IPSEC_NONBLOCK_ACQUIRE 4587 struct secacq *acq, *nextacq; 4588 4589 restart: 4590 mutex_enter(&key_mtx); 4591 LIST_FOREACH_SAFE(acq, &acqtree, chain, nextacq) { 4592 if (now - acq->created > key_blockacq_lifetime) { 4593 LIST_REMOVE(acq, chain); 4594 mutex_exit(&key_mtx); 4595 kmem_free(acq, sizeof(*acq)); 4596 goto restart; 4597 } 4598 } 4599 mutex_exit(&key_mtx); 4600 #endif 4601 } 4602 4603 static void 4604 key_timehandler_spacq(time_t now) 4605 { 4606 #ifdef notyet 4607 struct secspacq *acq, *nextacq; 4608 4609 LIST_FOREACH_SAFE(acq, &spacqtree, chain, nextacq) { 4610 if (now - acq->created > key_blockacq_lifetime) { 4611 KASSERT(__LIST_CHAINED(acq)); 4612 LIST_REMOVE(acq, chain); 4613 kmem_free(acq, sizeof(*acq)); 4614 } 4615 } 4616 #endif 4617 } 4618 4619 /* 4620 * time handler. 4621 * scanning SPD and SAD to check status for each entries, 4622 * and do to remove or to expire. 4623 */ 4624 static void 4625 key_timehandler_work(struct work *wk, void *arg) 4626 { 4627 int s; 4628 time_t now = time_uptime; 4629 4630 s = splsoftnet(); 4631 mutex_enter(softnet_lock); 4632 4633 key_timehandler_spd(now); 4634 key_timehandler_sad(now); 4635 key_timehandler_acq(now); 4636 key_timehandler_spacq(now); 4637 4638 /* do exchange to tick time !! */ 4639 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4640 4641 mutex_exit(softnet_lock); 4642 splx(s); 4643 return; 4644 } 4645 4646 static void 4647 key_timehandler(void *arg) 4648 { 4649 4650 workqueue_enqueue(key_timehandler_wq, &key_timehandler_wk, NULL); 4651 } 4652 4653 u_long 4654 key_random(void) 4655 { 4656 u_long value; 4657 4658 key_randomfill(&value, sizeof(value)); 4659 return value; 4660 } 4661 4662 void 4663 key_randomfill(void *p, size_t l) 4664 { 4665 4666 cprng_fast(p, l); 4667 } 4668 4669 /* 4670 * map SADB_SATYPE_* to IPPROTO_*. 4671 * if satype == SADB_SATYPE then satype is mapped to ~0. 4672 * OUT: 4673 * 0: invalid satype. 4674 */ 4675 static u_int16_t 4676 key_satype2proto(u_int8_t satype) 4677 { 4678 switch (satype) { 4679 case SADB_SATYPE_UNSPEC: 4680 return IPSEC_PROTO_ANY; 4681 case SADB_SATYPE_AH: 4682 return IPPROTO_AH; 4683 case SADB_SATYPE_ESP: 4684 return IPPROTO_ESP; 4685 case SADB_X_SATYPE_IPCOMP: 4686 return IPPROTO_IPCOMP; 4687 case SADB_X_SATYPE_TCPSIGNATURE: 4688 return IPPROTO_TCP; 4689 default: 4690 return 0; 4691 } 4692 /* NOTREACHED */ 4693 } 4694 4695 /* 4696 * map IPPROTO_* to SADB_SATYPE_* 4697 * OUT: 4698 * 0: invalid protocol type. 4699 */ 4700 static u_int8_t 4701 key_proto2satype(u_int16_t proto) 4702 { 4703 switch (proto) { 4704 case IPPROTO_AH: 4705 return SADB_SATYPE_AH; 4706 case IPPROTO_ESP: 4707 return SADB_SATYPE_ESP; 4708 case IPPROTO_IPCOMP: 4709 return SADB_X_SATYPE_IPCOMP; 4710 case IPPROTO_TCP: 4711 return SADB_X_SATYPE_TCPSIGNATURE; 4712 default: 4713 return 0; 4714 } 4715 /* NOTREACHED */ 4716 } 4717 4718 static int 4719 key_setsecasidx(int proto, int mode, int reqid, 4720 const struct sockaddr *src, const struct sockaddr *dst, 4721 struct secasindex * saidx) 4722 { 4723 const union sockaddr_union *src_u = (const union sockaddr_union *)src; 4724 const union sockaddr_union *dst_u = (const union sockaddr_union *)dst; 4725 4726 /* sa len safety check */ 4727 if (key_checksalen(src_u) != 0) 4728 return -1; 4729 if (key_checksalen(dst_u) != 0) 4730 return -1; 4731 4732 memset(saidx, 0, sizeof(*saidx)); 4733 saidx->proto = proto; 4734 saidx->mode = mode; 4735 saidx->reqid = reqid; 4736 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4737 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4738 4739 key_porttosaddr(&((saidx)->src), 0); 4740 key_porttosaddr(&((saidx)->dst), 0); 4741 return 0; 4742 } 4743 4744 static void 4745 key_init_spidx_bymsghdr(struct secpolicyindex *spidx, 4746 const struct sadb_msghdr *mhp) 4747 { 4748 const struct sadb_address *src0, *dst0; 4749 const struct sockaddr *src, *dst; 4750 const struct sadb_x_policy *xpl0; 4751 4752 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 4753 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 4754 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4755 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4756 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 4757 4758 memset(spidx, 0, sizeof(*spidx)); 4759 spidx->dir = xpl0->sadb_x_policy_dir; 4760 spidx->prefs = src0->sadb_address_prefixlen; 4761 spidx->prefd = dst0->sadb_address_prefixlen; 4762 spidx->ul_proto = src0->sadb_address_proto; 4763 /* XXX boundary check against sa_len */ 4764 memcpy(&spidx->src, src, src->sa_len); 4765 memcpy(&spidx->dst, dst, dst->sa_len); 4766 } 4767 4768 /* %%% PF_KEY */ 4769 /* 4770 * SADB_GETSPI processing is to receive 4771 * <base, (SA2), src address, dst address, (SPI range)> 4772 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4773 * tree with the status of LARVAL, and send 4774 * <base, SA(*), address(SD)> 4775 * to the IKMPd. 4776 * 4777 * IN: mhp: pointer to the pointer to each header. 4778 * OUT: NULL if fail. 4779 * other if success, return pointer to the message to send. 4780 */ 4781 static int 4782 key_api_getspi(struct socket *so, struct mbuf *m, 4783 const struct sadb_msghdr *mhp) 4784 { 4785 const struct sockaddr *src, *dst; 4786 struct secasindex saidx; 4787 struct secashead *newsah; 4788 struct secasvar *newsav; 4789 u_int8_t proto; 4790 u_int32_t spi; 4791 u_int8_t mode; 4792 u_int16_t reqid; 4793 int error; 4794 4795 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4796 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4797 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4798 return key_senderror(so, m, EINVAL); 4799 } 4800 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4801 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4802 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4803 return key_senderror(so, m, EINVAL); 4804 } 4805 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4806 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4807 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4808 } else { 4809 mode = IPSEC_MODE_ANY; 4810 reqid = 0; 4811 } 4812 4813 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4814 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4815 4816 /* map satype to proto */ 4817 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 4818 if (proto == 0) { 4819 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 4820 return key_senderror(so, m, EINVAL); 4821 } 4822 4823 4824 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 4825 if (error != 0) 4826 return key_senderror(so, m, EINVAL); 4827 4828 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 4829 if (error != 0) 4830 return key_senderror(so, m, EINVAL); 4831 4832 /* SPI allocation */ 4833 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4834 &saidx); 4835 if (spi == 0) 4836 return key_senderror(so, m, EINVAL); 4837 4838 /* get a SA index */ 4839 newsah = key_getsah(&saidx, CMP_REQID); 4840 if (newsah == NULL) { 4841 /* create a new SA index */ 4842 newsah = key_newsah(&saidx); 4843 if (newsah == NULL) { 4844 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 4845 return key_senderror(so, m, ENOBUFS); 4846 } 4847 } 4848 4849 /* get a new SA */ 4850 /* XXX rewrite */ 4851 newsav = KEY_NEWSAV(m, mhp, &error); 4852 if (newsav == NULL) { 4853 /* XXX don't free new SA index allocated in above. */ 4854 return key_senderror(so, m, error); 4855 } 4856 4857 /* set spi */ 4858 newsav->spi = htonl(spi); 4859 4860 /* add to satree */ 4861 newsav->refcnt = 1; 4862 newsav->sah = newsah; 4863 newsav->state = SADB_SASTATE_LARVAL; 4864 LIST_INSERT_TAIL(&newsah->savtree[SADB_SASTATE_LARVAL], newsav, 4865 secasvar, chain); 4866 4867 #ifndef IPSEC_NONBLOCK_ACQUIRE 4868 /* delete the entry in acqtree */ 4869 if (mhp->msg->sadb_msg_seq != 0) { 4870 struct secacq *acq; 4871 mutex_enter(&key_mtx); 4872 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 4873 if (acq != NULL) { 4874 /* reset counter in order to deletion by timehandler. */ 4875 acq->created = time_uptime; 4876 acq->count = 0; 4877 } 4878 mutex_exit(&key_mtx); 4879 } 4880 #endif 4881 4882 { 4883 struct mbuf *n, *nn; 4884 struct sadb_sa *m_sa; 4885 int off, len; 4886 4887 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4888 PFKEY_ALIGN8(sizeof(struct sadb_sa)) <= MCLBYTES); 4889 4890 /* create new sadb_msg to reply. */ 4891 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4892 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4893 4894 MGETHDR(n, M_DONTWAIT, MT_DATA); 4895 if (len > MHLEN) { 4896 MCLGET(n, M_DONTWAIT); 4897 if ((n->m_flags & M_EXT) == 0) { 4898 m_freem(n); 4899 n = NULL; 4900 } 4901 } 4902 if (!n) 4903 return key_senderror(so, m, ENOBUFS); 4904 4905 n->m_len = len; 4906 n->m_next = NULL; 4907 off = 0; 4908 4909 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4910 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4911 4912 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4913 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4914 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4915 m_sa->sadb_sa_spi = htonl(spi); 4916 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4917 4918 KASSERTMSG(off == len, "length inconsistency"); 4919 4920 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4921 SADB_EXT_ADDRESS_DST); 4922 if (!n->m_next) { 4923 m_freem(n); 4924 return key_senderror(so, m, ENOBUFS); 4925 } 4926 4927 if (n->m_len < sizeof(struct sadb_msg)) { 4928 n = m_pullup(n, sizeof(struct sadb_msg)); 4929 if (n == NULL) 4930 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4931 } 4932 4933 n->m_pkthdr.len = 0; 4934 for (nn = n; nn; nn = nn->m_next) 4935 n->m_pkthdr.len += nn->m_len; 4936 4937 key_fill_replymsg(n, newsav->seq); 4938 4939 m_freem(m); 4940 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4941 } 4942 } 4943 4944 /* 4945 * allocating new SPI 4946 * called by key_api_getspi(). 4947 * OUT: 4948 * 0: failure. 4949 * others: success. 4950 */ 4951 static u_int32_t 4952 key_do_getnewspi(const struct sadb_spirange *spirange, 4953 const struct secasindex *saidx) 4954 { 4955 u_int32_t newspi; 4956 u_int32_t spmin, spmax; 4957 int count = key_spi_trycnt; 4958 4959 /* set spi range to allocate */ 4960 if (spirange != NULL) { 4961 spmin = spirange->sadb_spirange_min; 4962 spmax = spirange->sadb_spirange_max; 4963 } else { 4964 spmin = key_spi_minval; 4965 spmax = key_spi_maxval; 4966 } 4967 /* IPCOMP needs 2-byte SPI */ 4968 if (saidx->proto == IPPROTO_IPCOMP) { 4969 u_int32_t t; 4970 if (spmin >= 0x10000) 4971 spmin = 0xffff; 4972 if (spmax >= 0x10000) 4973 spmax = 0xffff; 4974 if (spmin > spmax) { 4975 t = spmin; spmin = spmax; spmax = t; 4976 } 4977 } 4978 4979 if (spmin == spmax) { 4980 if (key_checkspidup(saidx, htonl(spmin))) { 4981 IPSECLOG(LOG_DEBUG, "SPI %u exists already.\n", spmin); 4982 return 0; 4983 } 4984 4985 count--; /* taking one cost. */ 4986 newspi = spmin; 4987 4988 } else { 4989 4990 /* init SPI */ 4991 newspi = 0; 4992 4993 /* when requesting to allocate spi ranged */ 4994 while (count--) { 4995 /* generate pseudo-random SPI value ranged. */ 4996 newspi = spmin + (key_random() % (spmax - spmin + 1)); 4997 4998 if (!key_checkspidup(saidx, htonl(newspi))) 4999 break; 5000 } 5001 5002 if (count == 0 || newspi == 0) { 5003 IPSECLOG(LOG_DEBUG, "to allocate spi is failed.\n"); 5004 return 0; 5005 } 5006 } 5007 5008 /* statistics */ 5009 keystat.getspi_count = 5010 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5011 5012 return newspi; 5013 } 5014 5015 static int 5016 key_handle_natt_info(struct secasvar *sav, 5017 const struct sadb_msghdr *mhp) 5018 { 5019 const char *msg = "?" ; 5020 struct sadb_x_nat_t_type *type; 5021 struct sadb_x_nat_t_port *sport, *dport; 5022 struct sadb_address *iaddr, *raddr; 5023 struct sadb_x_nat_t_frag *frag; 5024 5025 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5026 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5027 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5028 return 0; 5029 5030 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5031 msg = "TYPE"; 5032 goto bad; 5033 } 5034 5035 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5036 msg = "SPORT"; 5037 goto bad; 5038 } 5039 5040 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5041 msg = "DPORT"; 5042 goto bad; 5043 } 5044 5045 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5046 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5047 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5048 msg = "OAI"; 5049 goto bad; 5050 } 5051 } 5052 5053 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5054 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5055 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5056 msg = "OAR"; 5057 goto bad; 5058 } 5059 } 5060 5061 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5062 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5063 msg = "FRAG"; 5064 goto bad; 5065 } 5066 } 5067 5068 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5069 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5070 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5071 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5072 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5073 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5074 5075 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5076 type->sadb_x_nat_t_type_type, 5077 ntohs(sport->sadb_x_nat_t_port_port), 5078 ntohs(dport->sadb_x_nat_t_port_port)); 5079 5080 sav->natt_type = type->sadb_x_nat_t_type_type; 5081 key_porttosaddr(&sav->sah->saidx.src, sport->sadb_x_nat_t_port_port); 5082 key_porttosaddr(&sav->sah->saidx.dst, dport->sadb_x_nat_t_port_port); 5083 if (frag) 5084 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5085 else 5086 sav->esp_frag = IP_MAXPACKET; 5087 5088 return 0; 5089 bad: 5090 IPSECLOG(LOG_DEBUG, "invalid message %s\n", msg); 5091 __USE(msg); 5092 return -1; 5093 } 5094 5095 /* Just update the IPSEC_NAT_T ports if present */ 5096 static int 5097 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5098 const struct sadb_msghdr *mhp) 5099 { 5100 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5101 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5102 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5103 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5104 5105 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5106 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5107 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5108 struct sadb_x_nat_t_type *type; 5109 struct sadb_x_nat_t_port *sport; 5110 struct sadb_x_nat_t_port *dport; 5111 5112 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5113 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5114 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5115 IPSECLOG(LOG_DEBUG, "invalid message\n"); 5116 return -1; 5117 } 5118 5119 type = (struct sadb_x_nat_t_type *) 5120 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5121 sport = (struct sadb_x_nat_t_port *) 5122 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5123 dport = (struct sadb_x_nat_t_port *) 5124 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5125 5126 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5127 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5128 5129 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5130 type->sadb_x_nat_t_type_type, 5131 ntohs(sport->sadb_x_nat_t_port_port), 5132 ntohs(dport->sadb_x_nat_t_port_port)); 5133 } 5134 5135 return 0; 5136 } 5137 5138 5139 /* 5140 * SADB_UPDATE processing 5141 * receive 5142 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5143 * key(AE), (identity(SD),) (sensitivity)> 5144 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5145 * and send 5146 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5147 * (identity(SD),) (sensitivity)> 5148 * to the ikmpd. 5149 * 5150 * m will always be freed. 5151 */ 5152 static int 5153 key_api_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5154 { 5155 struct sadb_sa *sa0; 5156 const struct sockaddr *src, *dst; 5157 struct secasindex saidx; 5158 struct secashead *sah; 5159 struct secasvar *sav, *newsav; 5160 u_int16_t proto; 5161 u_int8_t mode; 5162 u_int16_t reqid; 5163 int error; 5164 5165 /* map satype to proto */ 5166 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5167 if (proto == 0) { 5168 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5169 return key_senderror(so, m, EINVAL); 5170 } 5171 5172 if (mhp->ext[SADB_EXT_SA] == NULL || 5173 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5174 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5175 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5176 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5177 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5178 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5179 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5180 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5181 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5182 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5183 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5184 return key_senderror(so, m, EINVAL); 5185 } 5186 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5187 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5188 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5189 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5190 return key_senderror(so, m, EINVAL); 5191 } 5192 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5193 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5194 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5195 } else { 5196 mode = IPSEC_MODE_ANY; 5197 reqid = 0; 5198 } 5199 /* XXX boundary checking for other extensions */ 5200 5201 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5202 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5203 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5204 5205 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5206 if (error != 0) 5207 return key_senderror(so, m, EINVAL); 5208 5209 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5210 if (error != 0) 5211 return key_senderror(so, m, EINVAL); 5212 5213 /* get a SA header */ 5214 sah = key_getsah(&saidx, CMP_REQID); 5215 if (sah == NULL) { 5216 IPSECLOG(LOG_DEBUG, "no SA index found.\n"); 5217 return key_senderror(so, m, ENOENT); 5218 } 5219 5220 /* set spidx if there */ 5221 /* XXX rewrite */ 5222 error = key_setident(sah, m, mhp); 5223 if (error) 5224 return key_senderror(so, m, error); 5225 5226 /* find a SA with sequence number. */ 5227 #ifdef IPSEC_DOSEQCHECK 5228 if (mhp->msg->sadb_msg_seq != 0) { 5229 sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq); 5230 if (sav == NULL) { 5231 IPSECLOG(LOG_DEBUG, 5232 "no larval SA with sequence %u exists.\n", 5233 mhp->msg->sadb_msg_seq); 5234 return key_senderror(so, m, ENOENT); 5235 } 5236 } 5237 #else 5238 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5239 if (sav == NULL) { 5240 IPSECLOG(LOG_DEBUG, "no such a SA found (spi:%u)\n", 5241 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5242 return key_senderror(so, m, EINVAL); 5243 } 5244 #endif 5245 5246 /* validity check */ 5247 if (sav->sah->saidx.proto != proto) { 5248 IPSECLOG(LOG_DEBUG, "protocol mismatched (DB=%u param=%u)\n", 5249 sav->sah->saidx.proto, proto); 5250 error = EINVAL; 5251 goto error; 5252 } 5253 #ifdef IPSEC_DOSEQCHECK 5254 if (sav->spi != sa0->sadb_sa_spi) { 5255 IPSECLOG(LOG_DEBUG, "SPI mismatched (DB:%u param:%u)\n", 5256 (u_int32_t)ntohl(sav->spi), 5257 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5258 error = EINVAL; 5259 goto error; 5260 } 5261 #endif 5262 if (sav->pid != mhp->msg->sadb_msg_pid) { 5263 IPSECLOG(LOG_DEBUG, "pid mismatched (DB:%u param:%u)\n", 5264 sav->pid, mhp->msg->sadb_msg_pid); 5265 error = EINVAL; 5266 goto error; 5267 } 5268 5269 /* 5270 * Allocate a new SA instead of modifying the existing SA directly 5271 * to avoid race conditions. 5272 */ 5273 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 5274 5275 /* copy sav values */ 5276 newsav->spi = sav->spi; 5277 newsav->seq = sav->seq; 5278 newsav->created = sav->created; 5279 newsav->pid = sav->pid; 5280 newsav->sah = sav->sah; 5281 5282 error = key_setsaval(newsav, m, mhp); 5283 if (error) { 5284 key_delsav(newsav); 5285 goto error; 5286 } 5287 5288 error = key_handle_natt_info(newsav, mhp); 5289 if (error != 0) { 5290 key_delsav(newsav); 5291 goto error; 5292 } 5293 5294 error = key_init_xform(newsav); 5295 if (error != 0) { 5296 key_delsav(newsav); 5297 goto error; 5298 } 5299 5300 /* add to satree */ 5301 newsav->refcnt = 1; 5302 newsav->state = SADB_SASTATE_MATURE; 5303 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_MATURE], newsav, 5304 secasvar, chain); 5305 5306 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5307 KEY_FREESAV(&sav); 5308 KEY_FREESAV(&sav); 5309 5310 { 5311 struct mbuf *n; 5312 5313 /* set msg buf from mhp */ 5314 n = key_getmsgbuf_x1(m, mhp); 5315 if (n == NULL) { 5316 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5317 return key_senderror(so, m, ENOBUFS); 5318 } 5319 5320 m_freem(m); 5321 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5322 } 5323 error: 5324 KEY_FREESAV(&sav); 5325 return key_senderror(so, m, error); 5326 } 5327 5328 /* 5329 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5330 * only called by key_api_update(). 5331 * OUT: 5332 * NULL : not found 5333 * others : found, pointer to a SA. 5334 */ 5335 #ifdef IPSEC_DOSEQCHECK 5336 static struct secasvar * 5337 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5338 { 5339 struct secasvar *sav; 5340 u_int state; 5341 5342 state = SADB_SASTATE_LARVAL; 5343 5344 /* search SAD with sequence number ? */ 5345 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5346 5347 KEY_CHKSASTATE(state, sav->state); 5348 5349 if (sav->seq == seq) { 5350 SA_ADDREF(sav); 5351 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5352 "DP cause refcnt++:%d SA:%p\n", 5353 sav->refcnt, sav); 5354 return sav; 5355 } 5356 } 5357 5358 return NULL; 5359 } 5360 #endif 5361 5362 /* 5363 * SADB_ADD processing 5364 * add an entry to SA database, when received 5365 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5366 * key(AE), (identity(SD),) (sensitivity)> 5367 * from the ikmpd, 5368 * and send 5369 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5370 * (identity(SD),) (sensitivity)> 5371 * to the ikmpd. 5372 * 5373 * IGNORE identity and sensitivity messages. 5374 * 5375 * m will always be freed. 5376 */ 5377 static int 5378 key_api_add(struct socket *so, struct mbuf *m, 5379 const struct sadb_msghdr *mhp) 5380 { 5381 struct sadb_sa *sa0; 5382 const struct sockaddr *src, *dst; 5383 struct secasindex saidx; 5384 struct secashead *newsah; 5385 struct secasvar *newsav; 5386 u_int16_t proto; 5387 u_int8_t mode; 5388 u_int16_t reqid; 5389 int error; 5390 5391 /* map satype to proto */ 5392 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5393 if (proto == 0) { 5394 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5395 return key_senderror(so, m, EINVAL); 5396 } 5397 5398 if (mhp->ext[SADB_EXT_SA] == NULL || 5399 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5400 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5401 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5402 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5403 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5404 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5405 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5406 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5407 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5408 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5409 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5410 return key_senderror(so, m, EINVAL); 5411 } 5412 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5413 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5414 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5415 /* XXX need more */ 5416 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5417 return key_senderror(so, m, EINVAL); 5418 } 5419 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5420 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5421 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5422 } else { 5423 mode = IPSEC_MODE_ANY; 5424 reqid = 0; 5425 } 5426 5427 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5428 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5429 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5430 5431 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5432 if (error != 0) 5433 return key_senderror(so, m, EINVAL); 5434 5435 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5436 if (error != 0) 5437 return key_senderror(so, m, EINVAL); 5438 5439 /* get a SA header */ 5440 newsah = key_getsah(&saidx, CMP_REQID); 5441 if (newsah == NULL) { 5442 /* create a new SA header */ 5443 newsah = key_newsah(&saidx); 5444 if (newsah == NULL) { 5445 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5446 return key_senderror(so, m, ENOBUFS); 5447 } 5448 } 5449 5450 /* set spidx if there */ 5451 /* XXX rewrite */ 5452 error = key_setident(newsah, m, mhp); 5453 if (error) { 5454 return key_senderror(so, m, error); 5455 } 5456 5457 { 5458 struct secasvar *sav; 5459 5460 /* We can create new SA only if SPI is differenct. */ 5461 sav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 5462 if (sav != NULL) { 5463 KEY_FREESAV(&sav); 5464 IPSECLOG(LOG_DEBUG, "SA already exists.\n"); 5465 return key_senderror(so, m, EEXIST); 5466 } 5467 } 5468 5469 /* create new SA entry. */ 5470 newsav = KEY_NEWSAV(m, mhp, &error); 5471 if (newsav == NULL) { 5472 return key_senderror(so, m, error); 5473 } 5474 newsav->sah = newsah; 5475 5476 error = key_handle_natt_info(newsav, mhp); 5477 if (error != 0) { 5478 key_delsav(newsav); 5479 return key_senderror(so, m, EINVAL); 5480 } 5481 5482 error = key_init_xform(newsav); 5483 if (error != 0) { 5484 key_delsav(newsav); 5485 return key_senderror(so, m, error); 5486 } 5487 5488 /* add to satree */ 5489 newsav->refcnt = 1; 5490 newsav->state = SADB_SASTATE_MATURE; 5491 LIST_INSERT_TAIL(&newsah->savtree[SADB_SASTATE_MATURE], newsav, 5492 secasvar, chain); 5493 5494 /* 5495 * don't call key_freesav() here, as we would like to keep the SA 5496 * in the database on success. 5497 */ 5498 5499 { 5500 struct mbuf *n; 5501 5502 /* set msg buf from mhp */ 5503 n = key_getmsgbuf_x1(m, mhp); 5504 if (n == NULL) { 5505 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5506 return key_senderror(so, m, ENOBUFS); 5507 } 5508 5509 m_freem(m); 5510 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5511 } 5512 } 5513 5514 /* m is retained */ 5515 static int 5516 key_setident(struct secashead *sah, struct mbuf *m, 5517 const struct sadb_msghdr *mhp) 5518 { 5519 const struct sadb_ident *idsrc, *iddst; 5520 int idsrclen, iddstlen; 5521 5522 KASSERT(!cpu_softintr_p()); 5523 KASSERT(sah != NULL); 5524 KASSERT(m != NULL); 5525 KASSERT(mhp != NULL); 5526 KASSERT(mhp->msg != NULL); 5527 5528 /* 5529 * Can be called with an existing sah from key_api_update(). 5530 */ 5531 if (sah->idents != NULL) { 5532 kmem_free(sah->idents, sah->idents_len); 5533 sah->idents = NULL; 5534 sah->idents_len = 0; 5535 } 5536 if (sah->identd != NULL) { 5537 kmem_free(sah->identd, sah->identd_len); 5538 sah->identd = NULL; 5539 sah->identd_len = 0; 5540 } 5541 5542 /* don't make buffer if not there */ 5543 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5544 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5545 sah->idents = NULL; 5546 sah->identd = NULL; 5547 return 0; 5548 } 5549 5550 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5551 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5552 IPSECLOG(LOG_DEBUG, "invalid identity.\n"); 5553 return EINVAL; 5554 } 5555 5556 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5557 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5558 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5559 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5560 5561 /* validity check */ 5562 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5563 IPSECLOG(LOG_DEBUG, "ident type mismatch.\n"); 5564 return EINVAL; 5565 } 5566 5567 switch (idsrc->sadb_ident_type) { 5568 case SADB_IDENTTYPE_PREFIX: 5569 case SADB_IDENTTYPE_FQDN: 5570 case SADB_IDENTTYPE_USERFQDN: 5571 default: 5572 /* XXX do nothing */ 5573 sah->idents = NULL; 5574 sah->identd = NULL; 5575 return 0; 5576 } 5577 5578 /* make structure */ 5579 sah->idents = kmem_alloc(idsrclen, KM_SLEEP); 5580 sah->idents_len = idsrclen; 5581 sah->identd = kmem_alloc(iddstlen, KM_SLEEP); 5582 sah->identd_len = iddstlen; 5583 memcpy(sah->idents, idsrc, idsrclen); 5584 memcpy(sah->identd, iddst, iddstlen); 5585 5586 return 0; 5587 } 5588 5589 /* 5590 * m will not be freed on return. 5591 * it is caller's responsibility to free the result. 5592 */ 5593 static struct mbuf * 5594 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5595 { 5596 struct mbuf *n; 5597 5598 KASSERT(m != NULL); 5599 KASSERT(mhp != NULL); 5600 KASSERT(mhp->msg != NULL); 5601 5602 /* create new sadb_msg to reply. */ 5603 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5604 SADB_EXT_SA, SADB_X_EXT_SA2, 5605 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5606 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5607 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5608 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5609 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5610 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5611 if (!n) 5612 return NULL; 5613 5614 if (n->m_len < sizeof(struct sadb_msg)) { 5615 n = m_pullup(n, sizeof(struct sadb_msg)); 5616 if (n == NULL) 5617 return NULL; 5618 } 5619 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5620 mtod(n, struct sadb_msg *)->sadb_msg_len = 5621 PFKEY_UNIT64(n->m_pkthdr.len); 5622 5623 return n; 5624 } 5625 5626 static int key_delete_all (struct socket *, struct mbuf *, 5627 const struct sadb_msghdr *, u_int16_t); 5628 5629 /* 5630 * SADB_DELETE processing 5631 * receive 5632 * <base, SA(*), address(SD)> 5633 * from the ikmpd, and set SADB_SASTATE_DEAD, 5634 * and send, 5635 * <base, SA(*), address(SD)> 5636 * to the ikmpd. 5637 * 5638 * m will always be freed. 5639 */ 5640 static int 5641 key_api_delete(struct socket *so, struct mbuf *m, 5642 const struct sadb_msghdr *mhp) 5643 { 5644 struct sadb_sa *sa0; 5645 const struct sockaddr *src, *dst; 5646 struct secasindex saidx; 5647 struct secashead *sah; 5648 struct secasvar *sav = NULL; 5649 u_int16_t proto; 5650 int error; 5651 5652 /* map satype to proto */ 5653 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5654 if (proto == 0) { 5655 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5656 return key_senderror(so, m, EINVAL); 5657 } 5658 5659 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5660 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5661 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5662 return key_senderror(so, m, EINVAL); 5663 } 5664 5665 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5666 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5667 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5668 return key_senderror(so, m, EINVAL); 5669 } 5670 5671 if (mhp->ext[SADB_EXT_SA] == NULL) { 5672 /* 5673 * Caller wants us to delete all non-LARVAL SAs 5674 * that match the src/dst. This is used during 5675 * IKE INITIAL-CONTACT. 5676 */ 5677 IPSECLOG(LOG_DEBUG, "doing delete all.\n"); 5678 return key_delete_all(so, m, mhp, proto); 5679 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5680 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5681 return key_senderror(so, m, EINVAL); 5682 } 5683 5684 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5685 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5686 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5687 5688 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5689 if (error != 0) 5690 return key_senderror(so, m, EINVAL); 5691 5692 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5693 if (error != 0) 5694 return key_senderror(so, m, EINVAL); 5695 5696 /* get a SA header */ 5697 sah = key_getsah(&saidx, CMP_HEAD); 5698 if (sah != NULL) { 5699 /* get a SA with SPI. */ 5700 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5701 } 5702 5703 if (sav == NULL) { 5704 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5705 return key_senderror(so, m, ENOENT); 5706 } 5707 5708 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5709 KEY_FREESAV(&sav); 5710 KEY_FREESAV(&sav); 5711 5712 { 5713 struct mbuf *n; 5714 5715 /* create new sadb_msg to reply. */ 5716 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5717 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5718 if (!n) 5719 return key_senderror(so, m, ENOBUFS); 5720 5721 n = key_fill_replymsg(n, 0); 5722 if (n == NULL) 5723 return key_senderror(so, m, ENOBUFS); 5724 5725 m_freem(m); 5726 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5727 } 5728 } 5729 5730 /* 5731 * delete all SAs for src/dst. Called from key_api_delete(). 5732 */ 5733 static int 5734 key_delete_all(struct socket *so, struct mbuf *m, 5735 const struct sadb_msghdr *mhp, u_int16_t proto) 5736 { 5737 const struct sockaddr *src, *dst; 5738 struct secasindex saidx; 5739 struct secashead *sah; 5740 struct secasvar *sav, *nextsav; 5741 u_int state; 5742 int error; 5743 5744 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5745 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5746 5747 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5748 if (error != 0) 5749 return key_senderror(so, m, EINVAL); 5750 5751 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5752 if (error != 0) 5753 return key_senderror(so, m, EINVAL); 5754 5755 sah = key_getsah(&saidx, CMP_HEAD); 5756 if (sah != NULL) { 5757 /* Delete all non-LARVAL SAs. */ 5758 SASTATE_ALIVE_FOREACH(state) { 5759 if (state == SADB_SASTATE_LARVAL) 5760 continue; 5761 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 5762 nextsav) { 5763 /* sanity check */ 5764 if (sav->state != state) { 5765 IPSECLOG(LOG_DEBUG, 5766 "invalid sav->state " 5767 "(queue: %d SA: %d)\n", 5768 state, sav->state); 5769 continue; 5770 } 5771 5772 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5773 KEY_FREESAV(&sav); 5774 } 5775 } 5776 } 5777 { 5778 struct mbuf *n; 5779 5780 /* create new sadb_msg to reply. */ 5781 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5782 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5783 if (!n) 5784 return key_senderror(so, m, ENOBUFS); 5785 5786 n = key_fill_replymsg(n, 0); 5787 if (n == NULL) 5788 return key_senderror(so, m, ENOBUFS); 5789 5790 m_freem(m); 5791 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5792 } 5793 } 5794 5795 /* 5796 * SADB_GET processing 5797 * receive 5798 * <base, SA(*), address(SD)> 5799 * from the ikmpd, and get a SP and a SA to respond, 5800 * and send, 5801 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5802 * (identity(SD),) (sensitivity)> 5803 * to the ikmpd. 5804 * 5805 * m will always be freed. 5806 */ 5807 static int 5808 key_api_get(struct socket *so, struct mbuf *m, 5809 const struct sadb_msghdr *mhp) 5810 { 5811 struct sadb_sa *sa0; 5812 const struct sockaddr *src, *dst; 5813 struct secasindex saidx; 5814 struct secashead *sah; 5815 struct secasvar *sav = NULL; 5816 u_int16_t proto; 5817 int error; 5818 5819 /* map satype to proto */ 5820 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5821 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5822 return key_senderror(so, m, EINVAL); 5823 } 5824 5825 if (mhp->ext[SADB_EXT_SA] == NULL || 5826 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5827 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5828 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5829 return key_senderror(so, m, EINVAL); 5830 } 5831 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5832 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5833 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5834 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5835 return key_senderror(so, m, EINVAL); 5836 } 5837 5838 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5839 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5840 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5841 5842 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5843 if (error != 0) 5844 return key_senderror(so, m, EINVAL); 5845 5846 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5847 if (error != 0) 5848 return key_senderror(so, m, EINVAL); 5849 5850 /* get a SA header */ 5851 sah = key_getsah(&saidx, CMP_HEAD); 5852 if (sah != NULL) { 5853 /* get a SA with SPI. */ 5854 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5855 } 5856 if (sav == NULL) { 5857 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5858 return key_senderror(so, m, ENOENT); 5859 } 5860 5861 { 5862 struct mbuf *n; 5863 u_int8_t satype; 5864 5865 /* map proto to satype */ 5866 satype = key_proto2satype(sah->saidx.proto); 5867 if (satype == 0) { 5868 KEY_FREESAV(&sav); 5869 IPSECLOG(LOG_DEBUG, "there was invalid proto in SAD.\n"); 5870 return key_senderror(so, m, EINVAL); 5871 } 5872 5873 /* create new sadb_msg to reply. */ 5874 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5875 mhp->msg->sadb_msg_pid); 5876 KEY_FREESAV(&sav); 5877 if (!n) 5878 return key_senderror(so, m, ENOBUFS); 5879 5880 m_freem(m); 5881 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5882 } 5883 } 5884 5885 /* XXX make it sysctl-configurable? */ 5886 static void 5887 key_getcomb_setlifetime(struct sadb_comb *comb) 5888 { 5889 5890 comb->sadb_comb_soft_allocations = 1; 5891 comb->sadb_comb_hard_allocations = 1; 5892 comb->sadb_comb_soft_bytes = 0; 5893 comb->sadb_comb_hard_bytes = 0; 5894 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5895 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5896 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5897 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5898 } 5899 5900 /* 5901 * XXX reorder combinations by preference 5902 * XXX no idea if the user wants ESP authentication or not 5903 */ 5904 static struct mbuf * 5905 key_getcomb_esp(void) 5906 { 5907 struct sadb_comb *comb; 5908 const struct enc_xform *algo; 5909 struct mbuf *result = NULL, *m, *n; 5910 int encmin; 5911 int i, off, o; 5912 int totlen; 5913 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5914 5915 m = NULL; 5916 for (i = 1; i <= SADB_EALG_MAX; i++) { 5917 algo = esp_algorithm_lookup(i); 5918 if (algo == NULL) 5919 continue; 5920 5921 /* discard algorithms with key size smaller than system min */ 5922 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5923 continue; 5924 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5925 encmin = ipsec_esp_keymin; 5926 else 5927 encmin = _BITS(algo->minkey); 5928 5929 if (ipsec_esp_auth) 5930 m = key_getcomb_ah(); 5931 else { 5932 KASSERTMSG(l <= MLEN, 5933 "l=%u > MLEN=%lu", l, (u_long) MLEN); 5934 MGET(m, M_DONTWAIT, MT_DATA); 5935 if (m) { 5936 M_ALIGN(m, l); 5937 m->m_len = l; 5938 m->m_next = NULL; 5939 memset(mtod(m, void *), 0, m->m_len); 5940 } 5941 } 5942 if (!m) 5943 goto fail; 5944 5945 totlen = 0; 5946 for (n = m; n; n = n->m_next) 5947 totlen += n->m_len; 5948 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 5949 5950 for (off = 0; off < totlen; off += l) { 5951 n = m_pulldown(m, off, l, &o); 5952 if (!n) { 5953 /* m is already freed */ 5954 goto fail; 5955 } 5956 comb = (struct sadb_comb *)(mtod(n, char *) + o); 5957 memset(comb, 0, sizeof(*comb)); 5958 key_getcomb_setlifetime(comb); 5959 comb->sadb_comb_encrypt = i; 5960 comb->sadb_comb_encrypt_minbits = encmin; 5961 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5962 } 5963 5964 if (!result) 5965 result = m; 5966 else 5967 m_cat(result, m); 5968 } 5969 5970 return result; 5971 5972 fail: 5973 if (result) 5974 m_freem(result); 5975 return NULL; 5976 } 5977 5978 static void 5979 key_getsizes_ah(const struct auth_hash *ah, int alg, 5980 u_int16_t* ksmin, u_int16_t* ksmax) 5981 { 5982 *ksmin = *ksmax = ah->keysize; 5983 if (ah->keysize == 0) { 5984 /* 5985 * Transform takes arbitrary key size but algorithm 5986 * key size is restricted. Enforce this here. 5987 */ 5988 switch (alg) { 5989 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 5990 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 5991 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 5992 default: 5993 IPSECLOG(LOG_DEBUG, "unknown AH algorithm %u\n", alg); 5994 break; 5995 } 5996 } 5997 } 5998 5999 /* 6000 * XXX reorder combinations by preference 6001 */ 6002 static struct mbuf * 6003 key_getcomb_ah(void) 6004 { 6005 struct sadb_comb *comb; 6006 const struct auth_hash *algo; 6007 struct mbuf *m; 6008 u_int16_t minkeysize, maxkeysize; 6009 int i; 6010 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6011 6012 m = NULL; 6013 for (i = 1; i <= SADB_AALG_MAX; i++) { 6014 #if 1 6015 /* we prefer HMAC algorithms, not old algorithms */ 6016 if (i != SADB_AALG_SHA1HMAC && 6017 i != SADB_AALG_MD5HMAC && 6018 i != SADB_X_AALG_SHA2_256 && 6019 i != SADB_X_AALG_SHA2_384 && 6020 i != SADB_X_AALG_SHA2_512) 6021 continue; 6022 #endif 6023 algo = ah_algorithm_lookup(i); 6024 if (!algo) 6025 continue; 6026 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6027 /* discard algorithms with key size smaller than system min */ 6028 if (_BITS(minkeysize) < ipsec_ah_keymin) 6029 continue; 6030 6031 if (!m) { 6032 KASSERTMSG(l <= MLEN, 6033 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6034 MGET(m, M_DONTWAIT, MT_DATA); 6035 if (m) { 6036 M_ALIGN(m, l); 6037 m->m_len = l; 6038 m->m_next = NULL; 6039 } 6040 } else 6041 M_PREPEND(m, l, M_DONTWAIT); 6042 if (!m) 6043 return NULL; 6044 6045 if (m->m_len < sizeof(struct sadb_comb)) { 6046 m = m_pullup(m, sizeof(struct sadb_comb)); 6047 if (m == NULL) 6048 return NULL; 6049 } 6050 6051 comb = mtod(m, struct sadb_comb *); 6052 memset(comb, 0, sizeof(*comb)); 6053 key_getcomb_setlifetime(comb); 6054 comb->sadb_comb_auth = i; 6055 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6056 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6057 } 6058 6059 return m; 6060 } 6061 6062 /* 6063 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6064 * XXX reorder combinations by preference 6065 */ 6066 static struct mbuf * 6067 key_getcomb_ipcomp(void) 6068 { 6069 struct sadb_comb *comb; 6070 const struct comp_algo *algo; 6071 struct mbuf *m; 6072 int i; 6073 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6074 6075 m = NULL; 6076 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6077 algo = ipcomp_algorithm_lookup(i); 6078 if (!algo) 6079 continue; 6080 6081 if (!m) { 6082 KASSERTMSG(l <= MLEN, 6083 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6084 MGET(m, M_DONTWAIT, MT_DATA); 6085 if (m) { 6086 M_ALIGN(m, l); 6087 m->m_len = l; 6088 m->m_next = NULL; 6089 } 6090 } else 6091 M_PREPEND(m, l, M_DONTWAIT); 6092 if (!m) 6093 return NULL; 6094 6095 if (m->m_len < sizeof(struct sadb_comb)) { 6096 m = m_pullup(m, sizeof(struct sadb_comb)); 6097 if (m == NULL) 6098 return NULL; 6099 } 6100 6101 comb = mtod(m, struct sadb_comb *); 6102 memset(comb, 0, sizeof(*comb)); 6103 key_getcomb_setlifetime(comb); 6104 comb->sadb_comb_encrypt = i; 6105 /* what should we set into sadb_comb_*_{min,max}bits? */ 6106 } 6107 6108 return m; 6109 } 6110 6111 /* 6112 * XXX no way to pass mode (transport/tunnel) to userland 6113 * XXX replay checking? 6114 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6115 */ 6116 static struct mbuf * 6117 key_getprop(const struct secasindex *saidx) 6118 { 6119 struct sadb_prop *prop; 6120 struct mbuf *m, *n; 6121 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6122 int totlen; 6123 6124 switch (saidx->proto) { 6125 case IPPROTO_ESP: 6126 m = key_getcomb_esp(); 6127 break; 6128 case IPPROTO_AH: 6129 m = key_getcomb_ah(); 6130 break; 6131 case IPPROTO_IPCOMP: 6132 m = key_getcomb_ipcomp(); 6133 break; 6134 default: 6135 return NULL; 6136 } 6137 6138 if (!m) 6139 return NULL; 6140 M_PREPEND(m, l, M_DONTWAIT); 6141 if (!m) 6142 return NULL; 6143 6144 totlen = 0; 6145 for (n = m; n; n = n->m_next) 6146 totlen += n->m_len; 6147 6148 prop = mtod(m, struct sadb_prop *); 6149 memset(prop, 0, sizeof(*prop)); 6150 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6151 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6152 prop->sadb_prop_replay = 32; /* XXX */ 6153 6154 return m; 6155 } 6156 6157 /* 6158 * SADB_ACQUIRE processing called by key_checkrequest() and key_api_acquire(). 6159 * send 6160 * <base, SA, address(SD), (address(P)), x_policy, 6161 * (identity(SD),) (sensitivity,) proposal> 6162 * to KMD, and expect to receive 6163 * <base> with SADB_ACQUIRE if error occurred, 6164 * or 6165 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6166 * from KMD by PF_KEY. 6167 * 6168 * XXX x_policy is outside of RFC2367 (KAME extension). 6169 * XXX sensitivity is not supported. 6170 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6171 * see comment for key_getcomb_ipcomp(). 6172 * 6173 * OUT: 6174 * 0 : succeed 6175 * others: error number 6176 */ 6177 static int 6178 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6179 { 6180 struct mbuf *result = NULL, *m; 6181 #ifndef IPSEC_NONBLOCK_ACQUIRE 6182 struct secacq *newacq; 6183 #endif 6184 u_int8_t satype; 6185 int error = -1; 6186 u_int32_t seq; 6187 6188 /* sanity check */ 6189 KASSERT(saidx != NULL); 6190 satype = key_proto2satype(saidx->proto); 6191 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6192 6193 #ifndef IPSEC_NONBLOCK_ACQUIRE 6194 /* 6195 * We never do anything about acquirng SA. There is anather 6196 * solution that kernel blocks to send SADB_ACQUIRE message until 6197 * getting something message from IKEd. In later case, to be 6198 * managed with ACQUIRING list. 6199 */ 6200 /* Get an entry to check whether sending message or not. */ 6201 mutex_enter(&key_mtx); 6202 newacq = key_getacq(saidx); 6203 if (newacq != NULL) { 6204 if (key_blockacq_count < newacq->count) { 6205 /* reset counter and do send message. */ 6206 newacq->count = 0; 6207 } else { 6208 /* increment counter and do nothing. */ 6209 newacq->count++; 6210 mutex_exit(&key_mtx); 6211 return 0; 6212 } 6213 } else { 6214 /* make new entry for blocking to send SADB_ACQUIRE. */ 6215 newacq = key_newacq(saidx); 6216 if (newacq == NULL) 6217 return ENOBUFS; 6218 6219 /* add to acqtree */ 6220 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6221 } 6222 6223 seq = newacq->seq; 6224 mutex_exit(&key_mtx); 6225 #else 6226 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6227 #endif 6228 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6229 if (!m) { 6230 error = ENOBUFS; 6231 goto fail; 6232 } 6233 result = m; 6234 6235 /* set sadb_address for saidx's. */ 6236 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &saidx->src.sa, FULLMASK, 6237 IPSEC_ULPROTO_ANY); 6238 if (!m) { 6239 error = ENOBUFS; 6240 goto fail; 6241 } 6242 m_cat(result, m); 6243 6244 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &saidx->dst.sa, FULLMASK, 6245 IPSEC_ULPROTO_ANY); 6246 if (!m) { 6247 error = ENOBUFS; 6248 goto fail; 6249 } 6250 m_cat(result, m); 6251 6252 /* XXX proxy address (optional) */ 6253 6254 /* set sadb_x_policy */ 6255 if (sp) { 6256 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6257 if (!m) { 6258 error = ENOBUFS; 6259 goto fail; 6260 } 6261 m_cat(result, m); 6262 } 6263 6264 /* XXX identity (optional) */ 6265 #if 0 6266 if (idexttype && fqdn) { 6267 /* create identity extension (FQDN) */ 6268 struct sadb_ident *id; 6269 int fqdnlen; 6270 6271 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6272 id = (struct sadb_ident *)p; 6273 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6274 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6275 id->sadb_ident_exttype = idexttype; 6276 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6277 memcpy(id + 1, fqdn, fqdnlen); 6278 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6279 } 6280 6281 if (idexttype) { 6282 /* create identity extension (USERFQDN) */ 6283 struct sadb_ident *id; 6284 int userfqdnlen; 6285 6286 if (userfqdn) { 6287 /* +1 for terminating-NUL */ 6288 userfqdnlen = strlen(userfqdn) + 1; 6289 } else 6290 userfqdnlen = 0; 6291 id = (struct sadb_ident *)p; 6292 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6293 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6294 id->sadb_ident_exttype = idexttype; 6295 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6296 /* XXX is it correct? */ 6297 if (curlwp) 6298 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6299 if (userfqdn && userfqdnlen) 6300 memcpy(id + 1, userfqdn, userfqdnlen); 6301 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6302 } 6303 #endif 6304 6305 /* XXX sensitivity (optional) */ 6306 6307 /* create proposal/combination extension */ 6308 m = key_getprop(saidx); 6309 #if 0 6310 /* 6311 * spec conformant: always attach proposal/combination extension, 6312 * the problem is that we have no way to attach it for ipcomp, 6313 * due to the way sadb_comb is declared in RFC2367. 6314 */ 6315 if (!m) { 6316 error = ENOBUFS; 6317 goto fail; 6318 } 6319 m_cat(result, m); 6320 #else 6321 /* 6322 * outside of spec; make proposal/combination extension optional. 6323 */ 6324 if (m) 6325 m_cat(result, m); 6326 #endif 6327 6328 if ((result->m_flags & M_PKTHDR) == 0) { 6329 error = EINVAL; 6330 goto fail; 6331 } 6332 6333 if (result->m_len < sizeof(struct sadb_msg)) { 6334 result = m_pullup(result, sizeof(struct sadb_msg)); 6335 if (result == NULL) { 6336 error = ENOBUFS; 6337 goto fail; 6338 } 6339 } 6340 6341 result->m_pkthdr.len = 0; 6342 for (m = result; m; m = m->m_next) 6343 result->m_pkthdr.len += m->m_len; 6344 6345 mtod(result, struct sadb_msg *)->sadb_msg_len = 6346 PFKEY_UNIT64(result->m_pkthdr.len); 6347 6348 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6349 6350 fail: 6351 if (result) 6352 m_freem(result); 6353 return error; 6354 } 6355 6356 #ifndef IPSEC_NONBLOCK_ACQUIRE 6357 static struct secacq * 6358 key_newacq(const struct secasindex *saidx) 6359 { 6360 struct secacq *newacq; 6361 6362 /* get new entry */ 6363 newacq = kmem_intr_zalloc(sizeof(struct secacq), KM_NOSLEEP); 6364 if (newacq == NULL) { 6365 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6366 return NULL; 6367 } 6368 6369 /* copy secindex */ 6370 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6371 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6372 newacq->created = time_uptime; 6373 newacq->count = 0; 6374 6375 return newacq; 6376 } 6377 6378 static struct secacq * 6379 key_getacq(const struct secasindex *saidx) 6380 { 6381 struct secacq *acq; 6382 6383 KASSERT(mutex_owned(&key_mtx)); 6384 6385 LIST_FOREACH(acq, &acqtree, chain) { 6386 if (key_saidx_match(saidx, &acq->saidx, CMP_EXACTLY)) 6387 return acq; 6388 } 6389 6390 return NULL; 6391 } 6392 6393 static struct secacq * 6394 key_getacqbyseq(u_int32_t seq) 6395 { 6396 struct secacq *acq; 6397 6398 KASSERT(mutex_owned(&key_mtx)); 6399 6400 LIST_FOREACH(acq, &acqtree, chain) { 6401 if (acq->seq == seq) 6402 return acq; 6403 } 6404 6405 return NULL; 6406 } 6407 #endif 6408 6409 #ifdef notyet 6410 static struct secspacq * 6411 key_newspacq(const struct secpolicyindex *spidx) 6412 { 6413 struct secspacq *acq; 6414 6415 /* get new entry */ 6416 acq = kmem_intr_zalloc(sizeof(struct secspacq), KM_NOSLEEP); 6417 if (acq == NULL) { 6418 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6419 return NULL; 6420 } 6421 6422 /* copy secindex */ 6423 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6424 acq->created = time_uptime; 6425 acq->count = 0; 6426 6427 return acq; 6428 } 6429 6430 static struct secspacq * 6431 key_getspacq(const struct secpolicyindex *spidx) 6432 { 6433 struct secspacq *acq; 6434 6435 LIST_FOREACH(acq, &spacqtree, chain) { 6436 if (key_spidx_match_exactly(spidx, &acq->spidx)) 6437 return acq; 6438 } 6439 6440 return NULL; 6441 } 6442 #endif /* notyet */ 6443 6444 /* 6445 * SADB_ACQUIRE processing, 6446 * in first situation, is receiving 6447 * <base> 6448 * from the ikmpd, and clear sequence of its secasvar entry. 6449 * 6450 * In second situation, is receiving 6451 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6452 * from a user land process, and return 6453 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6454 * to the socket. 6455 * 6456 * m will always be freed. 6457 */ 6458 static int 6459 key_api_acquire(struct socket *so, struct mbuf *m, 6460 const struct sadb_msghdr *mhp) 6461 { 6462 const struct sockaddr *src, *dst; 6463 struct secasindex saidx; 6464 struct secashead *sah; 6465 u_int16_t proto; 6466 int error; 6467 6468 /* 6469 * Error message from KMd. 6470 * We assume that if error was occurred in IKEd, the length of PFKEY 6471 * message is equal to the size of sadb_msg structure. 6472 * We do not raise error even if error occurred in this function. 6473 */ 6474 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6475 #ifndef IPSEC_NONBLOCK_ACQUIRE 6476 struct secacq *acq; 6477 6478 /* check sequence number */ 6479 if (mhp->msg->sadb_msg_seq == 0) { 6480 IPSECLOG(LOG_DEBUG, "must specify sequence number.\n"); 6481 m_freem(m); 6482 return 0; 6483 } 6484 6485 mutex_enter(&key_mtx); 6486 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 6487 if (acq == NULL) { 6488 mutex_exit(&key_mtx); 6489 /* 6490 * the specified larval SA is already gone, or we got 6491 * a bogus sequence number. we can silently ignore it. 6492 */ 6493 m_freem(m); 6494 return 0; 6495 } 6496 6497 /* reset acq counter in order to deletion by timehander. */ 6498 acq->created = time_uptime; 6499 acq->count = 0; 6500 mutex_exit(&key_mtx); 6501 #endif 6502 m_freem(m); 6503 return 0; 6504 } 6505 6506 /* 6507 * This message is from user land. 6508 */ 6509 6510 /* map satype to proto */ 6511 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6512 if (proto == 0) { 6513 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6514 return key_senderror(so, m, EINVAL); 6515 } 6516 6517 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6518 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6519 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6520 /* error */ 6521 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6522 return key_senderror(so, m, EINVAL); 6523 } 6524 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6525 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6526 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6527 /* error */ 6528 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6529 return key_senderror(so, m, EINVAL); 6530 } 6531 6532 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6533 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6534 6535 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6536 if (error != 0) 6537 return key_senderror(so, m, EINVAL); 6538 6539 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6540 if (error != 0) 6541 return key_senderror(so, m, EINVAL); 6542 6543 /* get a SA index */ 6544 sah = key_getsah(&saidx, CMP_MODE_REQID); 6545 if (sah != NULL) { 6546 IPSECLOG(LOG_DEBUG, "a SA exists already.\n"); 6547 return key_senderror(so, m, EEXIST); 6548 } 6549 6550 error = key_acquire(&saidx, NULL); 6551 if (error != 0) { 6552 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 6553 error); 6554 return key_senderror(so, m, error); 6555 } 6556 6557 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6558 } 6559 6560 /* 6561 * SADB_REGISTER processing. 6562 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6563 * receive 6564 * <base> 6565 * from the ikmpd, and register a socket to send PF_KEY messages, 6566 * and send 6567 * <base, supported> 6568 * to KMD by PF_KEY. 6569 * If socket is detached, must free from regnode. 6570 * 6571 * m will always be freed. 6572 */ 6573 static int 6574 key_api_register(struct socket *so, struct mbuf *m, 6575 const struct sadb_msghdr *mhp) 6576 { 6577 struct secreg *reg, *newreg = 0; 6578 6579 /* check for invalid register message */ 6580 if (mhp->msg->sadb_msg_satype >= __arraycount(regtree)) 6581 return key_senderror(so, m, EINVAL); 6582 6583 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6584 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6585 goto setmsg; 6586 6587 /* Allocate regnode in advance, out of mutex */ 6588 newreg = kmem_zalloc(sizeof(*newreg), KM_SLEEP); 6589 6590 /* check whether existing or not */ 6591 mutex_enter(&key_mtx); 6592 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6593 if (reg->so == so) { 6594 IPSECLOG(LOG_DEBUG, "socket exists already.\n"); 6595 mutex_exit(&key_mtx); 6596 kmem_free(newreg, sizeof(*newreg)); 6597 return key_senderror(so, m, EEXIST); 6598 } 6599 } 6600 6601 newreg->so = so; 6602 ((struct keycb *)sotorawcb(so))->kp_registered++; 6603 6604 /* add regnode to regtree. */ 6605 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6606 mutex_exit(&key_mtx); 6607 6608 setmsg: 6609 { 6610 struct mbuf *n; 6611 struct sadb_supported *sup; 6612 u_int len, alen, elen; 6613 int off; 6614 int i; 6615 struct sadb_alg *alg; 6616 6617 /* create new sadb_msg to reply. */ 6618 alen = 0; 6619 for (i = 1; i <= SADB_AALG_MAX; i++) { 6620 if (ah_algorithm_lookup(i)) 6621 alen += sizeof(struct sadb_alg); 6622 } 6623 if (alen) 6624 alen += sizeof(struct sadb_supported); 6625 elen = 0; 6626 for (i = 1; i <= SADB_EALG_MAX; i++) { 6627 if (esp_algorithm_lookup(i)) 6628 elen += sizeof(struct sadb_alg); 6629 } 6630 if (elen) 6631 elen += sizeof(struct sadb_supported); 6632 6633 len = sizeof(struct sadb_msg) + alen + elen; 6634 6635 if (len > MCLBYTES) 6636 return key_senderror(so, m, ENOBUFS); 6637 6638 MGETHDR(n, M_DONTWAIT, MT_DATA); 6639 if (len > MHLEN) { 6640 MCLGET(n, M_DONTWAIT); 6641 if ((n->m_flags & M_EXT) == 0) { 6642 m_freem(n); 6643 n = NULL; 6644 } 6645 } 6646 if (!n) 6647 return key_senderror(so, m, ENOBUFS); 6648 6649 n->m_pkthdr.len = n->m_len = len; 6650 n->m_next = NULL; 6651 off = 0; 6652 6653 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6654 n = key_fill_replymsg(n, 0); 6655 if (n == NULL) 6656 return key_senderror(so, m, ENOBUFS); 6657 6658 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6659 6660 /* for authentication algorithm */ 6661 if (alen) { 6662 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6663 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6664 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6665 off += PFKEY_ALIGN8(sizeof(*sup)); 6666 6667 for (i = 1; i <= SADB_AALG_MAX; i++) { 6668 const struct auth_hash *aalgo; 6669 u_int16_t minkeysize, maxkeysize; 6670 6671 aalgo = ah_algorithm_lookup(i); 6672 if (!aalgo) 6673 continue; 6674 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6675 alg->sadb_alg_id = i; 6676 alg->sadb_alg_ivlen = 0; 6677 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6678 alg->sadb_alg_minbits = _BITS(minkeysize); 6679 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6680 off += PFKEY_ALIGN8(sizeof(*alg)); 6681 } 6682 } 6683 6684 /* for encryption algorithm */ 6685 if (elen) { 6686 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6687 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6688 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6689 off += PFKEY_ALIGN8(sizeof(*sup)); 6690 6691 for (i = 1; i <= SADB_EALG_MAX; i++) { 6692 const struct enc_xform *ealgo; 6693 6694 ealgo = esp_algorithm_lookup(i); 6695 if (!ealgo) 6696 continue; 6697 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6698 alg->sadb_alg_id = i; 6699 alg->sadb_alg_ivlen = ealgo->blocksize; 6700 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6701 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6702 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6703 } 6704 } 6705 6706 KASSERTMSG(off == len, "length inconsistency"); 6707 6708 m_freem(m); 6709 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6710 } 6711 } 6712 6713 /* 6714 * free secreg entry registered. 6715 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6716 */ 6717 void 6718 key_freereg(struct socket *so) 6719 { 6720 struct secreg *reg; 6721 int i; 6722 6723 KASSERT(!cpu_softintr_p()); 6724 KASSERT(so != NULL); 6725 6726 /* 6727 * check whether existing or not. 6728 * check all type of SA, because there is a potential that 6729 * one socket is registered to multiple type of SA. 6730 */ 6731 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6732 mutex_enter(&key_mtx); 6733 LIST_FOREACH(reg, ®tree[i], chain) { 6734 if (reg->so == so) { 6735 LIST_REMOVE(reg, chain); 6736 break; 6737 } 6738 } 6739 mutex_exit(&key_mtx); 6740 if (reg != NULL) 6741 kmem_free(reg, sizeof(*reg)); 6742 } 6743 6744 return; 6745 } 6746 6747 /* 6748 * SADB_EXPIRE processing 6749 * send 6750 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6751 * to KMD by PF_KEY. 6752 * NOTE: We send only soft lifetime extension. 6753 * 6754 * OUT: 0 : succeed 6755 * others : error number 6756 */ 6757 static int 6758 key_expire(struct secasvar *sav) 6759 { 6760 int s; 6761 int satype; 6762 struct mbuf *result = NULL, *m; 6763 int len; 6764 int error = -1; 6765 struct sadb_lifetime *lt; 6766 6767 /* XXX: Why do we lock ? */ 6768 s = splsoftnet(); /*called from softclock()*/ 6769 6770 KASSERT(sav != NULL); 6771 KASSERT(sav->sah != NULL); 6772 6773 satype = key_proto2satype(sav->sah->saidx.proto); 6774 KASSERTMSG(satype != 0, "invalid proto is passed"); 6775 6776 /* set msg header */ 6777 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6778 if (!m) { 6779 error = ENOBUFS; 6780 goto fail; 6781 } 6782 result = m; 6783 6784 /* create SA extension */ 6785 m = key_setsadbsa(sav); 6786 if (!m) { 6787 error = ENOBUFS; 6788 goto fail; 6789 } 6790 m_cat(result, m); 6791 6792 /* create SA extension */ 6793 m = key_setsadbxsa2(sav->sah->saidx.mode, 6794 sav->replay ? sav->replay->count : 0, sav->sah->saidx.reqid); 6795 if (!m) { 6796 error = ENOBUFS; 6797 goto fail; 6798 } 6799 m_cat(result, m); 6800 6801 /* create lifetime extension (current and soft) */ 6802 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6803 m = key_alloc_mbuf(len); 6804 if (!m || m->m_next) { /*XXX*/ 6805 if (m) 6806 m_freem(m); 6807 error = ENOBUFS; 6808 goto fail; 6809 } 6810 memset(mtod(m, void *), 0, len); 6811 lt = mtod(m, struct sadb_lifetime *); 6812 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6813 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6814 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6815 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6816 lt->sadb_lifetime_addtime = 6817 time_mono_to_wall(sav->lft_c->sadb_lifetime_addtime); 6818 lt->sadb_lifetime_usetime = 6819 time_mono_to_wall(sav->lft_c->sadb_lifetime_usetime); 6820 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6821 memcpy(lt, sav->lft_s, sizeof(*lt)); 6822 m_cat(result, m); 6823 6824 /* set sadb_address for source */ 6825 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 6826 FULLMASK, IPSEC_ULPROTO_ANY); 6827 if (!m) { 6828 error = ENOBUFS; 6829 goto fail; 6830 } 6831 m_cat(result, m); 6832 6833 /* set sadb_address for destination */ 6834 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.dst.sa, 6835 FULLMASK, IPSEC_ULPROTO_ANY); 6836 if (!m) { 6837 error = ENOBUFS; 6838 goto fail; 6839 } 6840 m_cat(result, m); 6841 6842 if ((result->m_flags & M_PKTHDR) == 0) { 6843 error = EINVAL; 6844 goto fail; 6845 } 6846 6847 if (result->m_len < sizeof(struct sadb_msg)) { 6848 result = m_pullup(result, sizeof(struct sadb_msg)); 6849 if (result == NULL) { 6850 error = ENOBUFS; 6851 goto fail; 6852 } 6853 } 6854 6855 result->m_pkthdr.len = 0; 6856 for (m = result; m; m = m->m_next) 6857 result->m_pkthdr.len += m->m_len; 6858 6859 mtod(result, struct sadb_msg *)->sadb_msg_len = 6860 PFKEY_UNIT64(result->m_pkthdr.len); 6861 6862 splx(s); 6863 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6864 6865 fail: 6866 if (result) 6867 m_freem(result); 6868 splx(s); 6869 return error; 6870 } 6871 6872 /* 6873 * SADB_FLUSH processing 6874 * receive 6875 * <base> 6876 * from the ikmpd, and free all entries in secastree. 6877 * and send, 6878 * <base> 6879 * to the ikmpd. 6880 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6881 * 6882 * m will always be freed. 6883 */ 6884 static int 6885 key_api_flush(struct socket *so, struct mbuf *m, 6886 const struct sadb_msghdr *mhp) 6887 { 6888 struct sadb_msg *newmsg; 6889 struct secashead *sah; 6890 struct secasvar *sav, *nextsav; 6891 u_int16_t proto; 6892 u_int8_t state; 6893 6894 /* map satype to proto */ 6895 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6896 if (proto == 0) { 6897 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6898 return key_senderror(so, m, EINVAL); 6899 } 6900 6901 /* no SATYPE specified, i.e. flushing all SA. */ 6902 LIST_FOREACH(sah, &sahtree, chain) { 6903 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && 6904 proto != sah->saidx.proto) 6905 continue; 6906 6907 SASTATE_ALIVE_FOREACH(state) { 6908 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 6909 nextsav) { 6910 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6911 KEY_FREESAV(&sav); 6912 } 6913 } 6914 6915 sah->state = SADB_SASTATE_DEAD; 6916 } 6917 6918 if (m->m_len < sizeof(struct sadb_msg) || 6919 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6920 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6921 return key_senderror(so, m, ENOBUFS); 6922 } 6923 6924 if (m->m_next) 6925 m_freem(m->m_next); 6926 m->m_next = NULL; 6927 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6928 newmsg = mtod(m, struct sadb_msg *); 6929 newmsg->sadb_msg_errno = 0; 6930 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6931 6932 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6933 } 6934 6935 6936 static struct mbuf * 6937 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6938 { 6939 struct secashead *sah; 6940 struct secasvar *sav; 6941 u_int16_t proto; 6942 u_int8_t satype; 6943 u_int8_t state; 6944 int cnt; 6945 struct mbuf *m, *n, *prev; 6946 6947 *lenp = 0; 6948 6949 /* map satype to proto */ 6950 proto = key_satype2proto(req_satype); 6951 if (proto == 0) { 6952 *errorp = EINVAL; 6953 return (NULL); 6954 } 6955 6956 /* count sav entries to be sent to userland. */ 6957 cnt = 0; 6958 LIST_FOREACH(sah, &sahtree, chain) { 6959 if (req_satype != SADB_SATYPE_UNSPEC && 6960 proto != sah->saidx.proto) 6961 continue; 6962 6963 SASTATE_ANY_FOREACH(state) { 6964 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6965 cnt++; 6966 } 6967 } 6968 } 6969 6970 if (cnt == 0) { 6971 *errorp = ENOENT; 6972 return (NULL); 6973 } 6974 6975 /* send this to the userland, one at a time. */ 6976 m = NULL; 6977 prev = m; 6978 LIST_FOREACH(sah, &sahtree, chain) { 6979 if (req_satype != SADB_SATYPE_UNSPEC && 6980 proto != sah->saidx.proto) 6981 continue; 6982 6983 /* map proto to satype */ 6984 satype = key_proto2satype(sah->saidx.proto); 6985 if (satype == 0) { 6986 m_freem(m); 6987 *errorp = EINVAL; 6988 return (NULL); 6989 } 6990 6991 SASTATE_ANY_FOREACH(state) { 6992 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6993 n = key_setdumpsa(sav, SADB_DUMP, satype, 6994 --cnt, pid); 6995 if (!n) { 6996 m_freem(m); 6997 *errorp = ENOBUFS; 6998 return (NULL); 6999 } 7000 7001 if (!m) 7002 m = n; 7003 else 7004 prev->m_nextpkt = n; 7005 prev = n; 7006 } 7007 } 7008 } 7009 7010 if (!m) { 7011 *errorp = EINVAL; 7012 return (NULL); 7013 } 7014 7015 if ((m->m_flags & M_PKTHDR) != 0) { 7016 m->m_pkthdr.len = 0; 7017 for (n = m; n; n = n->m_next) 7018 m->m_pkthdr.len += n->m_len; 7019 } 7020 7021 *errorp = 0; 7022 return (m); 7023 } 7024 7025 /* 7026 * SADB_DUMP processing 7027 * dump all entries including status of DEAD in SAD. 7028 * receive 7029 * <base> 7030 * from the ikmpd, and dump all secasvar leaves 7031 * and send, 7032 * <base> ..... 7033 * to the ikmpd. 7034 * 7035 * m will always be freed. 7036 */ 7037 static int 7038 key_api_dump(struct socket *so, struct mbuf *m0, 7039 const struct sadb_msghdr *mhp) 7040 { 7041 u_int16_t proto; 7042 u_int8_t satype; 7043 struct mbuf *n; 7044 int s; 7045 int error, len, ok; 7046 7047 /* map satype to proto */ 7048 satype = mhp->msg->sadb_msg_satype; 7049 proto = key_satype2proto(satype); 7050 if (proto == 0) { 7051 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7052 return key_senderror(so, m0, EINVAL); 7053 } 7054 7055 /* 7056 * If the requestor has insufficient socket-buffer space 7057 * for the entire chain, nobody gets any response to the DUMP. 7058 * XXX For now, only the requestor ever gets anything. 7059 * Moreover, if the requestor has any space at all, they receive 7060 * the entire chain, otherwise the request is refused with ENOBUFS. 7061 */ 7062 if (sbspace(&so->so_rcv) <= 0) { 7063 return key_senderror(so, m0, ENOBUFS); 7064 } 7065 7066 s = splsoftnet(); 7067 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7068 splx(s); 7069 7070 if (n == NULL) { 7071 return key_senderror(so, m0, ENOENT); 7072 } 7073 { 7074 uint64_t *ps = PFKEY_STAT_GETREF(); 7075 ps[PFKEY_STAT_IN_TOTAL]++; 7076 ps[PFKEY_STAT_IN_BYTES] += len; 7077 PFKEY_STAT_PUTREF(); 7078 } 7079 7080 /* 7081 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7082 * The requestor receives either the entire chain, or an 7083 * error message with ENOBUFS. 7084 * 7085 * sbappendaddrchain() takes the chain of entries, one 7086 * packet-record per SPD entry, prepends the key_src sockaddr 7087 * to each packet-record, links the sockaddr mbufs into a new 7088 * list of records, then appends the entire resulting 7089 * list to the requesting socket. 7090 */ 7091 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 7092 SB_PRIO_ONESHOT_OVERFLOW); 7093 7094 if (!ok) { 7095 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7096 m_freem(n); 7097 return key_senderror(so, m0, ENOBUFS); 7098 } 7099 7100 m_freem(m0); 7101 return 0; 7102 } 7103 7104 /* 7105 * SADB_X_PROMISC processing 7106 * 7107 * m will always be freed. 7108 */ 7109 static int 7110 key_api_promisc(struct socket *so, struct mbuf *m, 7111 const struct sadb_msghdr *mhp) 7112 { 7113 int olen; 7114 7115 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7116 7117 if (olen < sizeof(struct sadb_msg)) { 7118 #if 1 7119 return key_senderror(so, m, EINVAL); 7120 #else 7121 m_freem(m); 7122 return 0; 7123 #endif 7124 } else if (olen == sizeof(struct sadb_msg)) { 7125 /* enable/disable promisc mode */ 7126 struct keycb *kp = (struct keycb *)sotorawcb(so); 7127 if (kp == NULL) 7128 return key_senderror(so, m, EINVAL); 7129 mhp->msg->sadb_msg_errno = 0; 7130 switch (mhp->msg->sadb_msg_satype) { 7131 case 0: 7132 case 1: 7133 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7134 break; 7135 default: 7136 return key_senderror(so, m, EINVAL); 7137 } 7138 7139 /* send the original message back to everyone */ 7140 mhp->msg->sadb_msg_errno = 0; 7141 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7142 } else { 7143 /* send packet as is */ 7144 7145 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7146 7147 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7148 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7149 } 7150 } 7151 7152 static int (*key_api_typesw[]) (struct socket *, struct mbuf *, 7153 const struct sadb_msghdr *) = { 7154 NULL, /* SADB_RESERVED */ 7155 key_api_getspi, /* SADB_GETSPI */ 7156 key_api_update, /* SADB_UPDATE */ 7157 key_api_add, /* SADB_ADD */ 7158 key_api_delete, /* SADB_DELETE */ 7159 key_api_get, /* SADB_GET */ 7160 key_api_acquire, /* SADB_ACQUIRE */ 7161 key_api_register, /* SADB_REGISTER */ 7162 NULL, /* SADB_EXPIRE */ 7163 key_api_flush, /* SADB_FLUSH */ 7164 key_api_dump, /* SADB_DUMP */ 7165 key_api_promisc, /* SADB_X_PROMISC */ 7166 NULL, /* SADB_X_PCHANGE */ 7167 key_api_spdadd, /* SADB_X_SPDUPDATE */ 7168 key_api_spdadd, /* SADB_X_SPDADD */ 7169 key_api_spddelete, /* SADB_X_SPDDELETE */ 7170 key_api_spdget, /* SADB_X_SPDGET */ 7171 NULL, /* SADB_X_SPDACQUIRE */ 7172 key_api_spddump, /* SADB_X_SPDDUMP */ 7173 key_api_spdflush, /* SADB_X_SPDFLUSH */ 7174 key_api_spdadd, /* SADB_X_SPDSETIDX */ 7175 NULL, /* SADB_X_SPDEXPIRE */ 7176 key_api_spddelete2, /* SADB_X_SPDDELETE2 */ 7177 key_api_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7178 }; 7179 7180 /* 7181 * parse sadb_msg buffer to process PFKEYv2, 7182 * and create a data to response if needed. 7183 * I think to be dealed with mbuf directly. 7184 * IN: 7185 * msgp : pointer to pointer to a received buffer pulluped. 7186 * This is rewrited to response. 7187 * so : pointer to socket. 7188 * OUT: 7189 * length for buffer to send to user process. 7190 */ 7191 int 7192 key_parse(struct mbuf *m, struct socket *so) 7193 { 7194 struct sadb_msg *msg; 7195 struct sadb_msghdr mh; 7196 u_int orglen; 7197 int error; 7198 7199 KASSERT(m != NULL); 7200 KASSERT(so != NULL); 7201 7202 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7203 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7204 IPSECLOG(LOG_DEBUG, "passed sadb_msg\n"); 7205 kdebug_sadb(msg); 7206 } 7207 #endif 7208 7209 if (m->m_len < sizeof(struct sadb_msg)) { 7210 m = m_pullup(m, sizeof(struct sadb_msg)); 7211 if (!m) 7212 return ENOBUFS; 7213 } 7214 msg = mtod(m, struct sadb_msg *); 7215 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7216 7217 if ((m->m_flags & M_PKTHDR) == 0 || 7218 m->m_pkthdr.len != orglen) { 7219 IPSECLOG(LOG_DEBUG, "invalid message length.\n"); 7220 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7221 error = EINVAL; 7222 goto senderror; 7223 } 7224 7225 if (msg->sadb_msg_version != PF_KEY_V2) { 7226 IPSECLOG(LOG_DEBUG, "PF_KEY version %u is mismatched.\n", 7227 msg->sadb_msg_version); 7228 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7229 error = EINVAL; 7230 goto senderror; 7231 } 7232 7233 if (msg->sadb_msg_type > SADB_MAX) { 7234 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7235 msg->sadb_msg_type); 7236 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7237 error = EINVAL; 7238 goto senderror; 7239 } 7240 7241 /* for old-fashioned code - should be nuked */ 7242 if (m->m_pkthdr.len > MCLBYTES) { 7243 m_freem(m); 7244 return ENOBUFS; 7245 } 7246 if (m->m_next) { 7247 struct mbuf *n; 7248 7249 MGETHDR(n, M_DONTWAIT, MT_DATA); 7250 if (n && m->m_pkthdr.len > MHLEN) { 7251 MCLGET(n, M_DONTWAIT); 7252 if ((n->m_flags & M_EXT) == 0) { 7253 m_free(n); 7254 n = NULL; 7255 } 7256 } 7257 if (!n) { 7258 m_freem(m); 7259 return ENOBUFS; 7260 } 7261 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7262 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7263 n->m_next = NULL; 7264 m_freem(m); 7265 m = n; 7266 } 7267 7268 /* align the mbuf chain so that extensions are in contiguous region. */ 7269 error = key_align(m, &mh); 7270 if (error) 7271 return error; 7272 7273 if (m->m_next) { /*XXX*/ 7274 m_freem(m); 7275 return ENOBUFS; 7276 } 7277 7278 msg = mh.msg; 7279 7280 /* check SA type */ 7281 switch (msg->sadb_msg_satype) { 7282 case SADB_SATYPE_UNSPEC: 7283 switch (msg->sadb_msg_type) { 7284 case SADB_GETSPI: 7285 case SADB_UPDATE: 7286 case SADB_ADD: 7287 case SADB_DELETE: 7288 case SADB_GET: 7289 case SADB_ACQUIRE: 7290 case SADB_EXPIRE: 7291 IPSECLOG(LOG_DEBUG, 7292 "must specify satype when msg type=%u.\n", 7293 msg->sadb_msg_type); 7294 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7295 error = EINVAL; 7296 goto senderror; 7297 } 7298 break; 7299 case SADB_SATYPE_AH: 7300 case SADB_SATYPE_ESP: 7301 case SADB_X_SATYPE_IPCOMP: 7302 case SADB_X_SATYPE_TCPSIGNATURE: 7303 switch (msg->sadb_msg_type) { 7304 case SADB_X_SPDADD: 7305 case SADB_X_SPDDELETE: 7306 case SADB_X_SPDGET: 7307 case SADB_X_SPDDUMP: 7308 case SADB_X_SPDFLUSH: 7309 case SADB_X_SPDSETIDX: 7310 case SADB_X_SPDUPDATE: 7311 case SADB_X_SPDDELETE2: 7312 IPSECLOG(LOG_DEBUG, "illegal satype=%u\n", 7313 msg->sadb_msg_type); 7314 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7315 error = EINVAL; 7316 goto senderror; 7317 } 7318 break; 7319 case SADB_SATYPE_RSVP: 7320 case SADB_SATYPE_OSPFV2: 7321 case SADB_SATYPE_RIPV2: 7322 case SADB_SATYPE_MIP: 7323 IPSECLOG(LOG_DEBUG, "type %u isn't supported.\n", 7324 msg->sadb_msg_satype); 7325 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7326 error = EOPNOTSUPP; 7327 goto senderror; 7328 case 1: /* XXX: What does it do? */ 7329 if (msg->sadb_msg_type == SADB_X_PROMISC) 7330 break; 7331 /*FALLTHROUGH*/ 7332 default: 7333 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7334 msg->sadb_msg_satype); 7335 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7336 error = EINVAL; 7337 goto senderror; 7338 } 7339 7340 /* check field of upper layer protocol and address family */ 7341 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL && 7342 mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7343 struct sadb_address *src0, *dst0; 7344 u_int plen; 7345 7346 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7347 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7348 7349 /* check upper layer protocol */ 7350 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7351 IPSECLOG(LOG_DEBUG, "upper layer protocol mismatched.\n"); 7352 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7353 error = EINVAL; 7354 goto senderror; 7355 } 7356 7357 /* check family */ 7358 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7359 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7360 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 7361 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7362 error = EINVAL; 7363 goto senderror; 7364 } 7365 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7366 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7367 IPSECLOG(LOG_DEBUG, 7368 "address struct size mismatched.\n"); 7369 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7370 error = EINVAL; 7371 goto senderror; 7372 } 7373 7374 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7375 case AF_INET: 7376 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7377 sizeof(struct sockaddr_in)) { 7378 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7379 error = EINVAL; 7380 goto senderror; 7381 } 7382 break; 7383 case AF_INET6: 7384 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7385 sizeof(struct sockaddr_in6)) { 7386 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7387 error = EINVAL; 7388 goto senderror; 7389 } 7390 break; 7391 default: 7392 IPSECLOG(LOG_DEBUG, "unsupported address family.\n"); 7393 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7394 error = EAFNOSUPPORT; 7395 goto senderror; 7396 } 7397 7398 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7399 case AF_INET: 7400 plen = sizeof(struct in_addr) << 3; 7401 break; 7402 case AF_INET6: 7403 plen = sizeof(struct in6_addr) << 3; 7404 break; 7405 default: 7406 plen = 0; /*fool gcc*/ 7407 break; 7408 } 7409 7410 /* check max prefix length */ 7411 if (src0->sadb_address_prefixlen > plen || 7412 dst0->sadb_address_prefixlen > plen) { 7413 IPSECLOG(LOG_DEBUG, "illegal prefixlen.\n"); 7414 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7415 error = EINVAL; 7416 goto senderror; 7417 } 7418 7419 /* 7420 * prefixlen == 0 is valid because there can be a case when 7421 * all addresses are matched. 7422 */ 7423 } 7424 7425 if (msg->sadb_msg_type >= __arraycount(key_api_typesw) || 7426 key_api_typesw[msg->sadb_msg_type] == NULL) { 7427 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7428 error = EINVAL; 7429 goto senderror; 7430 } 7431 7432 return (*key_api_typesw[msg->sadb_msg_type])(so, m, &mh); 7433 7434 senderror: 7435 return key_senderror(so, m, error); 7436 } 7437 7438 static int 7439 key_senderror(struct socket *so, struct mbuf *m, int code) 7440 { 7441 struct sadb_msg *msg; 7442 7443 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7444 7445 msg = mtod(m, struct sadb_msg *); 7446 msg->sadb_msg_errno = code; 7447 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7448 } 7449 7450 /* 7451 * set the pointer to each header into message buffer. 7452 * m will be freed on error. 7453 * XXX larger-than-MCLBYTES extension? 7454 */ 7455 static int 7456 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7457 { 7458 struct mbuf *n; 7459 struct sadb_ext *ext; 7460 size_t off, end; 7461 int extlen; 7462 int toff; 7463 7464 KASSERT(m != NULL); 7465 KASSERT(mhp != NULL); 7466 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7467 7468 /* initialize */ 7469 memset(mhp, 0, sizeof(*mhp)); 7470 7471 mhp->msg = mtod(m, struct sadb_msg *); 7472 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7473 7474 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7475 extlen = end; /*just in case extlen is not updated*/ 7476 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7477 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7478 if (!n) { 7479 /* m is already freed */ 7480 return ENOBUFS; 7481 } 7482 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7483 7484 /* set pointer */ 7485 switch (ext->sadb_ext_type) { 7486 case SADB_EXT_SA: 7487 case SADB_EXT_ADDRESS_SRC: 7488 case SADB_EXT_ADDRESS_DST: 7489 case SADB_EXT_ADDRESS_PROXY: 7490 case SADB_EXT_LIFETIME_CURRENT: 7491 case SADB_EXT_LIFETIME_HARD: 7492 case SADB_EXT_LIFETIME_SOFT: 7493 case SADB_EXT_KEY_AUTH: 7494 case SADB_EXT_KEY_ENCRYPT: 7495 case SADB_EXT_IDENTITY_SRC: 7496 case SADB_EXT_IDENTITY_DST: 7497 case SADB_EXT_SENSITIVITY: 7498 case SADB_EXT_PROPOSAL: 7499 case SADB_EXT_SUPPORTED_AUTH: 7500 case SADB_EXT_SUPPORTED_ENCRYPT: 7501 case SADB_EXT_SPIRANGE: 7502 case SADB_X_EXT_POLICY: 7503 case SADB_X_EXT_SA2: 7504 case SADB_X_EXT_NAT_T_TYPE: 7505 case SADB_X_EXT_NAT_T_SPORT: 7506 case SADB_X_EXT_NAT_T_DPORT: 7507 case SADB_X_EXT_NAT_T_OAI: 7508 case SADB_X_EXT_NAT_T_OAR: 7509 case SADB_X_EXT_NAT_T_FRAG: 7510 /* duplicate check */ 7511 /* 7512 * XXX Are there duplication payloads of either 7513 * KEY_AUTH or KEY_ENCRYPT ? 7514 */ 7515 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7516 IPSECLOG(LOG_DEBUG, 7517 "duplicate ext_type %u is passed.\n", 7518 ext->sadb_ext_type); 7519 m_freem(m); 7520 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7521 return EINVAL; 7522 } 7523 break; 7524 default: 7525 IPSECLOG(LOG_DEBUG, "invalid ext_type %u is passed.\n", 7526 ext->sadb_ext_type); 7527 m_freem(m); 7528 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7529 return EINVAL; 7530 } 7531 7532 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7533 7534 if (key_validate_ext(ext, extlen)) { 7535 m_freem(m); 7536 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7537 return EINVAL; 7538 } 7539 7540 n = m_pulldown(m, off, extlen, &toff); 7541 if (!n) { 7542 /* m is already freed */ 7543 return ENOBUFS; 7544 } 7545 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7546 7547 mhp->ext[ext->sadb_ext_type] = ext; 7548 mhp->extoff[ext->sadb_ext_type] = off; 7549 mhp->extlen[ext->sadb_ext_type] = extlen; 7550 } 7551 7552 if (off != end) { 7553 m_freem(m); 7554 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7555 return EINVAL; 7556 } 7557 7558 return 0; 7559 } 7560 7561 static int 7562 key_validate_ext(const struct sadb_ext *ext, int len) 7563 { 7564 const struct sockaddr *sa; 7565 enum { NONE, ADDR } checktype = NONE; 7566 int baselen = 0; 7567 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7568 7569 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7570 return EINVAL; 7571 7572 /* if it does not match minimum/maximum length, bail */ 7573 if (ext->sadb_ext_type >= __arraycount(minsize) || 7574 ext->sadb_ext_type >= __arraycount(maxsize)) 7575 return EINVAL; 7576 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7577 return EINVAL; 7578 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7579 return EINVAL; 7580 7581 /* more checks based on sadb_ext_type XXX need more */ 7582 switch (ext->sadb_ext_type) { 7583 case SADB_EXT_ADDRESS_SRC: 7584 case SADB_EXT_ADDRESS_DST: 7585 case SADB_EXT_ADDRESS_PROXY: 7586 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7587 checktype = ADDR; 7588 break; 7589 case SADB_EXT_IDENTITY_SRC: 7590 case SADB_EXT_IDENTITY_DST: 7591 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7592 SADB_X_IDENTTYPE_ADDR) { 7593 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7594 checktype = ADDR; 7595 } else 7596 checktype = NONE; 7597 break; 7598 default: 7599 checktype = NONE; 7600 break; 7601 } 7602 7603 switch (checktype) { 7604 case NONE: 7605 break; 7606 case ADDR: 7607 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7608 if (len < baselen + sal) 7609 return EINVAL; 7610 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7611 return EINVAL; 7612 break; 7613 } 7614 7615 return 0; 7616 } 7617 7618 static int 7619 key_do_init(void) 7620 { 7621 int i, error; 7622 7623 mutex_init(&key_mtx, MUTEX_DEFAULT, IPL_NONE); 7624 7625 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7626 7627 callout_init(&key_timehandler_ch, 0); 7628 error = workqueue_create(&key_timehandler_wq, "key_timehandler", 7629 key_timehandler_work, NULL, PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 7630 if (error != 0) 7631 panic("%s: workqueue_create failed (%d)\n", __func__, error); 7632 7633 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7634 LIST_INIT(&sptree[i]); 7635 } 7636 7637 LIST_INIT(&sahtree); 7638 7639 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7640 LIST_INIT(®tree[i]); 7641 } 7642 7643 #ifndef IPSEC_NONBLOCK_ACQUIRE 7644 LIST_INIT(&acqtree); 7645 #endif 7646 #ifdef notyet 7647 LIST_INIT(&spacqtree); 7648 #endif 7649 7650 /* system default */ 7651 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7652 ip4_def_policy.refcnt++; /*never reclaim this*/ 7653 7654 #ifdef INET6 7655 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7656 ip6_def_policy.refcnt++; /*never reclaim this*/ 7657 #endif 7658 7659 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7660 7661 /* initialize key statistics */ 7662 keystat.getspi_count = 1; 7663 7664 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7665 7666 return (0); 7667 } 7668 7669 void 7670 key_init(void) 7671 { 7672 static ONCE_DECL(key_init_once); 7673 7674 sysctl_net_keyv2_setup(NULL); 7675 sysctl_net_key_compat_setup(NULL); 7676 7677 RUN_ONCE(&key_init_once, key_do_init); 7678 } 7679 7680 /* 7681 * XXX: maybe This function is called after INBOUND IPsec processing. 7682 * 7683 * Special check for tunnel-mode packets. 7684 * We must make some checks for consistency between inner and outer IP header. 7685 * 7686 * xxx more checks to be provided 7687 */ 7688 int 7689 key_checktunnelsanity( 7690 struct secasvar *sav, 7691 u_int family, 7692 void *src, 7693 void *dst 7694 ) 7695 { 7696 7697 KASSERT(sav->sah != NULL); 7698 7699 /* XXX: check inner IP header */ 7700 7701 return 1; 7702 } 7703 7704 #if 0 7705 #define hostnamelen strlen(hostname) 7706 7707 /* 7708 * Get FQDN for the host. 7709 * If the administrator configured hostname (by hostname(1)) without 7710 * domain name, returns nothing. 7711 */ 7712 static const char * 7713 key_getfqdn(void) 7714 { 7715 int i; 7716 int hasdot; 7717 static char fqdn[MAXHOSTNAMELEN + 1]; 7718 7719 if (!hostnamelen) 7720 return NULL; 7721 7722 /* check if it comes with domain name. */ 7723 hasdot = 0; 7724 for (i = 0; i < hostnamelen; i++) { 7725 if (hostname[i] == '.') 7726 hasdot++; 7727 } 7728 if (!hasdot) 7729 return NULL; 7730 7731 /* NOTE: hostname may not be NUL-terminated. */ 7732 memset(fqdn, 0, sizeof(fqdn)); 7733 memcpy(fqdn, hostname, hostnamelen); 7734 fqdn[hostnamelen] = '\0'; 7735 return fqdn; 7736 } 7737 7738 /* 7739 * get username@FQDN for the host/user. 7740 */ 7741 static const char * 7742 key_getuserfqdn(void) 7743 { 7744 const char *host; 7745 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7746 struct proc *p = curproc; 7747 char *q; 7748 7749 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7750 return NULL; 7751 if (!(host = key_getfqdn())) 7752 return NULL; 7753 7754 /* NOTE: s_login may not be-NUL terminated. */ 7755 memset(userfqdn, 0, sizeof(userfqdn)); 7756 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7757 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7758 q = userfqdn + strlen(userfqdn); 7759 *q++ = '@'; 7760 memcpy(q, host, strlen(host)); 7761 q += strlen(host); 7762 *q++ = '\0'; 7763 7764 return userfqdn; 7765 } 7766 #endif 7767 7768 /* record data transfer on SA, and update timestamps */ 7769 void 7770 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7771 { 7772 7773 KASSERT(sav != NULL); 7774 KASSERT(sav->lft_c != NULL); 7775 KASSERT(m != NULL); 7776 7777 /* 7778 * XXX Currently, there is a difference of bytes size 7779 * between inbound and outbound processing. 7780 */ 7781 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7782 /* to check bytes lifetime is done in key_timehandler(). */ 7783 7784 /* 7785 * We use the number of packets as the unit of 7786 * sadb_lifetime_allocations. We increment the variable 7787 * whenever {esp,ah}_{in,out}put is called. 7788 */ 7789 sav->lft_c->sadb_lifetime_allocations++; 7790 /* XXX check for expires? */ 7791 7792 /* 7793 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7794 * in seconds. HARD and SOFT lifetime are measured by the time 7795 * difference (again in seconds) from sadb_lifetime_usetime. 7796 * 7797 * usetime 7798 * v expire expire 7799 * -----+-----+--------+---> t 7800 * <--------------> HARD 7801 * <-----> SOFT 7802 */ 7803 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7804 /* XXX check for expires? */ 7805 7806 return; 7807 } 7808 7809 /* dumb version */ 7810 void 7811 key_sa_routechange(struct sockaddr *dst) 7812 { 7813 struct secashead *sah; 7814 struct route *ro; 7815 const struct sockaddr *sa; 7816 7817 LIST_FOREACH(sah, &sahtree, chain) { 7818 ro = &sah->sa_route; 7819 sa = rtcache_getdst(ro); 7820 if (sa != NULL && dst->sa_len == sa->sa_len && 7821 memcmp(dst, sa, dst->sa_len) == 0) 7822 rtcache_free(ro); 7823 } 7824 7825 return; 7826 } 7827 7828 static void 7829 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7830 { 7831 7832 KASSERT(sav != NULL); 7833 7834 if (sav->state == state) 7835 return; 7836 7837 KASSERT(__LIST_CHAINED(sav)); 7838 LIST_REMOVE(sav, chain); 7839 7840 sav->state = state; 7841 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7842 } 7843 7844 /* XXX too much? */ 7845 static struct mbuf * 7846 key_alloc_mbuf(int l) 7847 { 7848 struct mbuf *m = NULL, *n; 7849 int len, t; 7850 7851 len = l; 7852 while (len > 0) { 7853 MGET(n, M_DONTWAIT, MT_DATA); 7854 if (n && len > MLEN) 7855 MCLGET(n, M_DONTWAIT); 7856 if (!n) { 7857 m_freem(m); 7858 return NULL; 7859 } 7860 7861 n->m_next = NULL; 7862 n->m_len = 0; 7863 n->m_len = M_TRAILINGSPACE(n); 7864 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7865 if (n->m_len > len) { 7866 t = (n->m_len - len) & ~(sizeof(long) - 1); 7867 n->m_data += t; 7868 n->m_len = len; 7869 } 7870 7871 len -= n->m_len; 7872 7873 if (m) 7874 m_cat(m, n); 7875 else 7876 m = n; 7877 } 7878 7879 return m; 7880 } 7881 7882 static struct mbuf * 7883 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7884 { 7885 struct secashead *sah; 7886 struct secasvar *sav; 7887 u_int16_t proto; 7888 u_int8_t satype; 7889 u_int8_t state; 7890 int cnt; 7891 struct mbuf *m, *n; 7892 7893 /* map satype to proto */ 7894 proto = key_satype2proto(req_satype); 7895 if (proto == 0) { 7896 *errorp = EINVAL; 7897 return (NULL); 7898 } 7899 7900 /* count sav entries to be sent to the userland. */ 7901 cnt = 0; 7902 LIST_FOREACH(sah, &sahtree, chain) { 7903 if (req_satype != SADB_SATYPE_UNSPEC && 7904 proto != sah->saidx.proto) 7905 continue; 7906 7907 SASTATE_ANY_FOREACH(state) { 7908 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7909 cnt++; 7910 } 7911 } 7912 } 7913 7914 if (cnt == 0) { 7915 *errorp = ENOENT; 7916 return (NULL); 7917 } 7918 7919 /* send this to the userland, one at a time. */ 7920 m = NULL; 7921 LIST_FOREACH(sah, &sahtree, chain) { 7922 if (req_satype != SADB_SATYPE_UNSPEC && 7923 proto != sah->saidx.proto) 7924 continue; 7925 7926 /* map proto to satype */ 7927 satype = key_proto2satype(sah->saidx.proto); 7928 if (satype == 0) { 7929 m_freem(m); 7930 *errorp = EINVAL; 7931 return (NULL); 7932 } 7933 7934 SASTATE_ANY_FOREACH(state) { 7935 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7936 n = key_setdumpsa(sav, SADB_DUMP, satype, 7937 --cnt, pid); 7938 if (!n) { 7939 m_freem(m); 7940 *errorp = ENOBUFS; 7941 return (NULL); 7942 } 7943 7944 if (!m) 7945 m = n; 7946 else 7947 m_cat(m, n); 7948 } 7949 } 7950 } 7951 7952 if (!m) { 7953 *errorp = EINVAL; 7954 return (NULL); 7955 } 7956 7957 if ((m->m_flags & M_PKTHDR) != 0) { 7958 m->m_pkthdr.len = 0; 7959 for (n = m; n; n = n->m_next) 7960 m->m_pkthdr.len += n->m_len; 7961 } 7962 7963 *errorp = 0; 7964 return (m); 7965 } 7966 7967 static struct mbuf * 7968 key_setspddump(int *errorp, pid_t pid) 7969 { 7970 struct secpolicy *sp; 7971 int cnt; 7972 u_int dir; 7973 struct mbuf *m, *n; 7974 7975 /* search SPD entry and get buffer size. */ 7976 cnt = 0; 7977 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7978 LIST_FOREACH(sp, &sptree[dir], chain) { 7979 cnt++; 7980 } 7981 } 7982 7983 if (cnt == 0) { 7984 *errorp = ENOENT; 7985 return (NULL); 7986 } 7987 7988 m = NULL; 7989 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7990 LIST_FOREACH(sp, &sptree[dir], chain) { 7991 --cnt; 7992 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 7993 7994 if (!n) { 7995 *errorp = ENOBUFS; 7996 m_freem(m); 7997 return (NULL); 7998 } 7999 if (!m) 8000 m = n; 8001 else { 8002 m->m_pkthdr.len += n->m_pkthdr.len; 8003 m_cat(m, n); 8004 } 8005 } 8006 } 8007 8008 *errorp = 0; 8009 return (m); 8010 } 8011 8012 int 8013 key_get_used(void) { 8014 return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || 8015 !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); 8016 } 8017 8018 void 8019 key_update_used(void) 8020 { 8021 switch (ipsec_enabled) { 8022 default: 8023 case 0: 8024 #ifdef notyet 8025 /* XXX: racy */ 8026 ipsec_used = 0; 8027 #endif 8028 break; 8029 case 1: 8030 #ifndef notyet 8031 /* XXX: racy */ 8032 if (!ipsec_used) 8033 #endif 8034 ipsec_used = key_get_used(); 8035 break; 8036 case 2: 8037 ipsec_used = 1; 8038 break; 8039 } 8040 } 8041 8042 static int 8043 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8044 { 8045 struct mbuf *m, *n; 8046 int err2 = 0; 8047 char *p, *ep; 8048 size_t len; 8049 int s, error; 8050 8051 if (newp) 8052 return (EPERM); 8053 if (namelen != 1) 8054 return (EINVAL); 8055 8056 s = splsoftnet(); 8057 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8058 splx(s); 8059 if (!m) 8060 return (error); 8061 if (!oldp) 8062 *oldlenp = m->m_pkthdr.len; 8063 else { 8064 p = oldp; 8065 if (*oldlenp < m->m_pkthdr.len) { 8066 err2 = ENOMEM; 8067 ep = p + *oldlenp; 8068 } else { 8069 *oldlenp = m->m_pkthdr.len; 8070 ep = p + m->m_pkthdr.len; 8071 } 8072 for (n = m; n; n = n->m_next) { 8073 len = (ep - p < n->m_len) ? 8074 ep - p : n->m_len; 8075 error = copyout(mtod(n, const void *), p, len); 8076 p += len; 8077 if (error) 8078 break; 8079 } 8080 if (error == 0) 8081 error = err2; 8082 } 8083 m_freem(m); 8084 8085 return (error); 8086 } 8087 8088 static int 8089 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8090 { 8091 struct mbuf *m, *n; 8092 int err2 = 0; 8093 char *p, *ep; 8094 size_t len; 8095 int s, error; 8096 8097 if (newp) 8098 return (EPERM); 8099 if (namelen != 0) 8100 return (EINVAL); 8101 8102 s = splsoftnet(); 8103 m = key_setspddump(&error, l->l_proc->p_pid); 8104 splx(s); 8105 if (!m) 8106 return (error); 8107 if (!oldp) 8108 *oldlenp = m->m_pkthdr.len; 8109 else { 8110 p = oldp; 8111 if (*oldlenp < m->m_pkthdr.len) { 8112 err2 = ENOMEM; 8113 ep = p + *oldlenp; 8114 } else { 8115 *oldlenp = m->m_pkthdr.len; 8116 ep = p + m->m_pkthdr.len; 8117 } 8118 for (n = m; n; n = n->m_next) { 8119 len = (ep - p < n->m_len) ? ep - p : n->m_len; 8120 error = copyout(mtod(n, const void *), p, len); 8121 p += len; 8122 if (error) 8123 break; 8124 } 8125 if (error == 0) 8126 error = err2; 8127 } 8128 m_freem(m); 8129 8130 return (error); 8131 } 8132 8133 /* 8134 * Create sysctl tree for native IPSEC key knobs, originally 8135 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8136 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8137 * and in any case the part of our sysctl namespace used for dumping the 8138 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8139 * namespace, for API reasons. 8140 * 8141 * Pending a consensus on the right way to fix this, add a level of 8142 * indirection in how we number the `native' IPSEC key nodes; 8143 * and (as requested by Andrew Brown) move registration of the 8144 * KAME-compatible names to a separate function. 8145 */ 8146 #if 0 8147 # define IPSEC_PFKEY PF_KEY_V2 8148 # define IPSEC_PFKEY_NAME "keyv2" 8149 #else 8150 # define IPSEC_PFKEY PF_KEY 8151 # define IPSEC_PFKEY_NAME "key" 8152 #endif 8153 8154 static int 8155 sysctl_net_key_stats(SYSCTLFN_ARGS) 8156 { 8157 8158 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8159 } 8160 8161 static void 8162 sysctl_net_keyv2_setup(struct sysctllog **clog) 8163 { 8164 8165 sysctl_createv(clog, 0, NULL, NULL, 8166 CTLFLAG_PERMANENT, 8167 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8168 NULL, 0, NULL, 0, 8169 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8170 8171 sysctl_createv(clog, 0, NULL, NULL, 8172 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8173 CTLTYPE_INT, "debug", NULL, 8174 NULL, 0, &key_debug_level, 0, 8175 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8176 sysctl_createv(clog, 0, NULL, NULL, 8177 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8178 CTLTYPE_INT, "spi_try", NULL, 8179 NULL, 0, &key_spi_trycnt, 0, 8180 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8181 sysctl_createv(clog, 0, NULL, NULL, 8182 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8183 CTLTYPE_INT, "spi_min_value", NULL, 8184 NULL, 0, &key_spi_minval, 0, 8185 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8186 sysctl_createv(clog, 0, NULL, NULL, 8187 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8188 CTLTYPE_INT, "spi_max_value", NULL, 8189 NULL, 0, &key_spi_maxval, 0, 8190 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8191 sysctl_createv(clog, 0, NULL, NULL, 8192 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8193 CTLTYPE_INT, "random_int", NULL, 8194 NULL, 0, &key_int_random, 0, 8195 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8196 sysctl_createv(clog, 0, NULL, NULL, 8197 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8198 CTLTYPE_INT, "larval_lifetime", NULL, 8199 NULL, 0, &key_larval_lifetime, 0, 8200 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8201 sysctl_createv(clog, 0, NULL, NULL, 8202 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8203 CTLTYPE_INT, "blockacq_count", NULL, 8204 NULL, 0, &key_blockacq_count, 0, 8205 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8206 sysctl_createv(clog, 0, NULL, NULL, 8207 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8208 CTLTYPE_INT, "blockacq_lifetime", NULL, 8209 NULL, 0, &key_blockacq_lifetime, 0, 8210 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8211 sysctl_createv(clog, 0, NULL, NULL, 8212 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8213 CTLTYPE_INT, "esp_keymin", NULL, 8214 NULL, 0, &ipsec_esp_keymin, 0, 8215 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8216 sysctl_createv(clog, 0, NULL, NULL, 8217 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8218 CTLTYPE_INT, "prefered_oldsa", NULL, 8219 NULL, 0, &key_prefered_oldsa, 0, 8220 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8221 sysctl_createv(clog, 0, NULL, NULL, 8222 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8223 CTLTYPE_INT, "esp_auth", NULL, 8224 NULL, 0, &ipsec_esp_auth, 0, 8225 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8226 sysctl_createv(clog, 0, NULL, NULL, 8227 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8228 CTLTYPE_INT, "ah_keymin", NULL, 8229 NULL, 0, &ipsec_ah_keymin, 0, 8230 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8231 sysctl_createv(clog, 0, NULL, NULL, 8232 CTLFLAG_PERMANENT, 8233 CTLTYPE_STRUCT, "stats", 8234 SYSCTL_DESCR("PF_KEY statistics"), 8235 sysctl_net_key_stats, 0, NULL, 0, 8236 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8237 } 8238 8239 /* 8240 * Register sysctl names used by setkey(8). For historical reasons, 8241 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8242 * for both IPSEC and KAME IPSEC. 8243 */ 8244 static void 8245 sysctl_net_key_compat_setup(struct sysctllog **clog) 8246 { 8247 8248 sysctl_createv(clog, 0, NULL, NULL, 8249 CTLFLAG_PERMANENT, 8250 CTLTYPE_NODE, "key", NULL, 8251 NULL, 0, NULL, 0, 8252 CTL_NET, PF_KEY, CTL_EOL); 8253 8254 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8255 sysctl_createv(clog, 0, NULL, NULL, 8256 CTLFLAG_PERMANENT, 8257 CTLTYPE_STRUCT, "dumpsa", NULL, 8258 sysctl_net_key_dumpsa, 0, NULL, 0, 8259 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8260 sysctl_createv(clog, 0, NULL, NULL, 8261 CTLFLAG_PERMANENT, 8262 CTLTYPE_STRUCT, "dumpsp", NULL, 8263 sysctl_net_key_dumpsp, 0, NULL, 0, 8264 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8265 } 8266
Indexes created Tue Sep 23 02:09:52 GMT 2025