key.c revision 1.182
1 /* $NetBSD: key.c,v 1.182 2017/07/14 01:24:23 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 1.182 2017/07/14 01:24:23 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) 842 { 843 u_int level; 844 int error; 845 struct secasvar *oldsav = NULL; 846 const struct secasindex *saidx = &isr->saidx; 847 848 KASSERT(isr != 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 == (struct secasvar *)LIST_FIRST( 870 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 871 KEY_FREESAV(&isr->sav); 872 isr->sav = NULL; 873 } 874 } 875 #else 876 /* 877 * we free any SA stashed in the IPsec request because a different 878 * SA may be involved each time this request is checked, either 879 * because new SAs are being configured, or this request is 880 * associated with an unconnected datagram socket, or this request 881 * is associated with a system default policy. 882 * 883 * The operation may have negative impact to performance. We may 884 * want to check cached SA carefully, rather than picking new SA 885 * every time. 886 */ 887 if (isr->sav != NULL) 888 oldsav = isr->sav; 889 #endif 890 891 /* 892 * new SA allocation if no SA found. 893 * key_allocsa_policy should allocate the oldest SA available. 894 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 895 */ 896 isr->sav = key_allocsa_policy(saidx); 897 membar_producer(); 898 if (oldsav != NULL) 899 KEY_FREESAV(&oldsav); 900 901 /* When there is SA. */ 902 if (isr->sav != NULL) 903 return 0; 904 905 /* there is no SA */ 906 error = key_acquire(saidx, isr->sp); 907 if (error != 0) { 908 /* XXX What should I do ? */ 909 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 910 error); 911 return error; 912 } 913 914 if (level != IPSEC_LEVEL_REQUIRE) { 915 /* XXX sigh, the interface to this routine is botched */ 916 KASSERTMSG(isr->sav == NULL, "unexpected SA"); 917 return 0; 918 } else { 919 return ENOENT; 920 } 921 } 922 923 /* 924 * allocating a SA for policy entry from SAD. 925 * NOTE: searching SAD of aliving state. 926 * OUT: NULL: not found. 927 * others: found and return the pointer. 928 */ 929 static struct secasvar * 930 key_allocsa_policy(const struct secasindex *saidx) 931 { 932 struct secashead *sah; 933 struct secasvar *sav; 934 u_int stateidx, state; 935 const u_int *saorder_state_valid; 936 int arraysize; 937 938 sah = key_getsah(saidx, CMP_MODE_REQID); 939 if (sah == NULL) 940 return NULL; 941 942 /* 943 * search a valid state list for outbound packet. 944 * This search order is important. 945 */ 946 if (key_prefered_oldsa) { 947 saorder_state_valid = saorder_state_valid_prefer_old; 948 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 949 } else { 950 saorder_state_valid = saorder_state_valid_prefer_new; 951 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 952 } 953 954 /* search valid state */ 955 for (stateidx = 0; 956 stateidx < arraysize; 957 stateidx++) { 958 959 state = saorder_state_valid[stateidx]; 960 961 sav = key_do_allocsa_policy(sah, state); 962 if (sav != NULL) 963 return sav; 964 } 965 966 return NULL; 967 } 968 969 static void 970 key_sendup_message_delete(struct secasvar *sav) 971 { 972 struct mbuf *m, *result = 0; 973 uint8_t satype; 974 975 satype = key_proto2satype(sav->sah->saidx.proto); 976 if (satype == 0) 977 goto msgfail; 978 979 m = key_setsadbmsg(SADB_DELETE, 0, satype, 0, 0, sav->refcnt - 1); 980 if (m == NULL) 981 goto msgfail; 982 result = m; 983 984 /* set sadb_address for saidx's. */ 985 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 986 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 987 if (m == NULL) 988 goto msgfail; 989 m_cat(result, m); 990 991 /* set sadb_address for saidx's. */ 992 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.src.sa, 993 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 994 if (m == NULL) 995 goto msgfail; 996 m_cat(result, m); 997 998 /* create SA extension */ 999 m = key_setsadbsa(sav); 1000 if (m == NULL) 1001 goto msgfail; 1002 m_cat(result, m); 1003 1004 if (result->m_len < sizeof(struct sadb_msg)) { 1005 result = m_pullup(result, sizeof(struct sadb_msg)); 1006 if (result == NULL) 1007 goto msgfail; 1008 } 1009 1010 result->m_pkthdr.len = 0; 1011 for (m = result; m; m = m->m_next) 1012 result->m_pkthdr.len += m->m_len; 1013 mtod(result, struct sadb_msg *)->sadb_msg_len = 1014 PFKEY_UNIT64(result->m_pkthdr.len); 1015 1016 key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 1017 result = NULL; 1018 msgfail: 1019 if (result) 1020 m_freem(result); 1021 } 1022 1023 /* 1024 * searching SAD with direction, protocol, mode and state. 1025 * called by key_allocsa_policy(). 1026 * OUT: 1027 * NULL : not found 1028 * others : found, pointer to a SA. 1029 */ 1030 static struct secasvar * 1031 key_do_allocsa_policy(struct secashead *sah, u_int state) 1032 { 1033 struct secasvar *sav, *candidate, *d; 1034 1035 /* initilize */ 1036 candidate = NULL; 1037 1038 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1039 /* sanity check */ 1040 KEY_CHKSASTATE(sav->state, state); 1041 1042 /* initialize */ 1043 if (candidate == NULL) { 1044 candidate = sav; 1045 continue; 1046 } 1047 1048 /* Which SA is the better ? */ 1049 1050 /* sanity check 2 */ 1051 KASSERT(candidate->lft_c != NULL); 1052 KASSERT(sav->lft_c != NULL); 1053 1054 /* What the best method is to compare ? */ 1055 if (key_prefered_oldsa) { 1056 if (candidate->lft_c->sadb_lifetime_addtime > 1057 sav->lft_c->sadb_lifetime_addtime) { 1058 candidate = sav; 1059 } 1060 continue; 1061 /*NOTREACHED*/ 1062 } 1063 1064 /* prefered new sa rather than old sa */ 1065 if (candidate->lft_c->sadb_lifetime_addtime < 1066 sav->lft_c->sadb_lifetime_addtime) { 1067 d = candidate; 1068 candidate = sav; 1069 } else 1070 d = sav; 1071 1072 /* 1073 * prepared to delete the SA when there is more 1074 * suitable candidate and the lifetime of the SA is not 1075 * permanent. 1076 */ 1077 if (d->lft_c->sadb_lifetime_addtime != 0) { 1078 key_sa_chgstate(d, SADB_SASTATE_DEAD); 1079 KASSERT(d->refcnt > 0); 1080 key_sendup_message_delete(d); 1081 KEY_FREESAV(&d); 1082 } 1083 } 1084 1085 if (candidate) { 1086 SA_ADDREF(candidate); 1087 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1088 "DP cause refcnt++:%d SA:%p\n", 1089 candidate->refcnt, candidate); 1090 } 1091 return candidate; 1092 } 1093 1094 /* 1095 * allocating a usable SA entry for a *INBOUND* packet. 1096 * Must call key_freesav() later. 1097 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1098 * NULL: not found, or error occurred. 1099 * 1100 * In the comparison, no source address is used--for RFC2401 conformance. 1101 * To quote, from section 4.1: 1102 * A security association is uniquely identified by a triple consisting 1103 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1104 * security protocol (AH or ESP) identifier. 1105 * Note that, however, we do need to keep source address in IPsec SA. 1106 * IKE specification and PF_KEY specification do assume that we 1107 * keep source address in IPsec SA. We see a tricky situation here. 1108 * 1109 * sport and dport are used for NAT-T. network order is always used. 1110 */ 1111 struct secasvar * 1112 key_lookup_sa( 1113 const union sockaddr_union *dst, 1114 u_int proto, 1115 u_int32_t spi, 1116 u_int16_t sport, 1117 u_int16_t dport, 1118 const char* where, int tag) 1119 { 1120 struct secashead *sah; 1121 struct secasvar *sav; 1122 u_int stateidx, state; 1123 const u_int *saorder_state_valid; 1124 int arraysize, chkport; 1125 int s; 1126 1127 int must_check_spi = 1; 1128 int must_check_alg = 0; 1129 u_int16_t cpi = 0; 1130 u_int8_t algo = 0; 1131 1132 if ((sport != 0) && (dport != 0)) 1133 chkport = PORT_STRICT; 1134 else 1135 chkport = PORT_NONE; 1136 1137 KASSERT(dst != NULL); 1138 1139 /* 1140 * XXX IPCOMP case 1141 * We use cpi to define spi here. In the case where cpi <= 1142 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1143 * the real spi. In this case, don't check the spi but check the 1144 * algorithm 1145 */ 1146 1147 if (proto == IPPROTO_IPCOMP) { 1148 u_int32_t tmp; 1149 tmp = ntohl(spi); 1150 cpi = (u_int16_t) tmp; 1151 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1152 algo = (u_int8_t) cpi; 1153 must_check_spi = 0; 1154 must_check_alg = 1; 1155 } 1156 } 1157 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1158 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1159 where, tag, must_check_spi, must_check_alg); 1160 1161 1162 /* 1163 * searching SAD. 1164 * XXX: to be checked internal IP header somewhere. Also when 1165 * IPsec tunnel packet is received. But ESP tunnel mode is 1166 * encrypted so we can't check internal IP header. 1167 */ 1168 s = splsoftnet(); /*called from softclock()*/ 1169 if (key_prefered_oldsa) { 1170 saorder_state_valid = saorder_state_valid_prefer_old; 1171 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1172 } else { 1173 saorder_state_valid = saorder_state_valid_prefer_new; 1174 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1175 } 1176 LIST_FOREACH(sah, &sahtree, chain) { 1177 /* search valid state */ 1178 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1179 state = saorder_state_valid[stateidx]; 1180 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1181 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1182 "try match spi %#x, %#x\n", 1183 ntohl(spi), ntohl(sav->spi)); 1184 /* sanity check */ 1185 KEY_CHKSASTATE(sav->state, state); 1186 /* do not return entries w/ unusable state */ 1187 if (!SADB_SASTATE_USABLE_P(sav)) { 1188 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1189 "bad state %d\n", sav->state); 1190 continue; 1191 } 1192 if (proto != sav->sah->saidx.proto) { 1193 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1194 "proto fail %d != %d\n", 1195 proto, sav->sah->saidx.proto); 1196 continue; 1197 } 1198 if (must_check_spi && spi != sav->spi) { 1199 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1200 "spi fail %#x != %#x\n", 1201 ntohl(spi), ntohl(sav->spi)); 1202 continue; 1203 } 1204 /* XXX only on the ipcomp case */ 1205 if (must_check_alg && algo != sav->alg_comp) { 1206 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1207 "algo fail %d != %d\n", 1208 algo, sav->alg_comp); 1209 continue; 1210 } 1211 1212 #if 0 /* don't check src */ 1213 /* Fix port in src->sa */ 1214 1215 /* check src address */ 1216 if (!key_sockaddr_match(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE)) 1217 continue; 1218 #endif 1219 /* fix port of dst address XXX*/ 1220 key_porttosaddr(__UNCONST(dst), dport); 1221 /* check dst address */ 1222 if (!key_sockaddr_match(&dst->sa, &sav->sah->saidx.dst.sa, chkport)) 1223 continue; 1224 SA_ADDREF2(sav, where, tag); 1225 goto done; 1226 } 1227 } 1228 } 1229 sav = NULL; 1230 done: 1231 splx(s); 1232 1233 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1234 "DP return SA:%p; refcnt %u\n", sav, sav ? sav->refcnt : 0); 1235 return sav; 1236 } 1237 1238 void 1239 key_sp_ref(struct secpolicy *sp, const char* where, int tag) 1240 { 1241 1242 SP_ADDREF2(sp, where, tag); 1243 1244 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1245 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1246 sp, sp->id, where, tag, sp->refcnt); 1247 } 1248 1249 void 1250 key_sa_ref(struct secasvar *sav, const char* where, int tag) 1251 { 1252 1253 SA_ADDREF2(sav, where, tag); 1254 1255 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1256 "DP cause refcnt++:%d SA:%p from %s:%u\n", 1257 sav->refcnt, sav, where, tag); 1258 } 1259 1260 /* 1261 * Must be called after calling key_lookup_sp*(). 1262 * For both the packet without socket and key_freeso(). 1263 */ 1264 void 1265 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1266 { 1267 struct secpolicy *sp = *spp; 1268 unsigned int nv; 1269 1270 KASSERT(sp != NULL); 1271 1272 SP_DELREF2(sp, nv, where, tag); 1273 1274 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1275 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1276 sp, sp->id, where, tag, nv); 1277 1278 if (nv == 0) { 1279 *spp = NULL; 1280 key_delsp(sp); 1281 } 1282 } 1283 1284 #if 0 1285 /* 1286 * Must be called after calling key_lookup_sp*(). 1287 * For the packet with socket. 1288 */ 1289 static void 1290 key_freeso(struct socket *so) 1291 { 1292 /* sanity check */ 1293 KASSERT(so != NULL); 1294 1295 switch (so->so_proto->pr_domain->dom_family) { 1296 #ifdef INET 1297 case PF_INET: 1298 { 1299 struct inpcb *pcb = sotoinpcb(so); 1300 1301 /* Does it have a PCB ? */ 1302 if (pcb == NULL) 1303 return; 1304 1305 struct inpcbpolicy *sp = pcb->inp_sp; 1306 key_freesp_so(&sp->sp_in); 1307 key_freesp_so(&sp->sp_out); 1308 } 1309 break; 1310 #endif 1311 #ifdef INET6 1312 case PF_INET6: 1313 { 1314 #ifdef HAVE_NRL_INPCB 1315 struct inpcb *pcb = sotoinpcb(so); 1316 struct inpcbpolicy *sp = pcb->inp_sp; 1317 1318 /* Does it have a PCB ? */ 1319 if (pcb == NULL) 1320 return; 1321 key_freesp_so(&sp->sp_in); 1322 key_freesp_so(&sp->sp_out); 1323 #else 1324 struct in6pcb *pcb = sotoin6pcb(so); 1325 1326 /* Does it have a PCB ? */ 1327 if (pcb == NULL) 1328 return; 1329 key_freesp_so(&pcb->in6p_sp->sp_in); 1330 key_freesp_so(&pcb->in6p_sp->sp_out); 1331 #endif 1332 } 1333 break; 1334 #endif /* INET6 */ 1335 default: 1336 IPSECLOG(LOG_DEBUG, "unknown address family=%d.\n", 1337 so->so_proto->pr_domain->dom_family); 1338 return; 1339 } 1340 } 1341 1342 static void 1343 key_freesp_so(struct secpolicy **sp) 1344 { 1345 1346 KASSERT(sp != NULL); 1347 KASSERT(*sp != NULL); 1348 1349 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1350 (*sp)->policy == IPSEC_POLICY_BYPASS) 1351 return; 1352 1353 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1354 "invalid policy %u", (*sp)->policy); 1355 KEY_FREESP(sp); 1356 } 1357 #endif 1358 1359 /* 1360 * Must be called after calling key_lookup_sa(). 1361 * This function is called by key_freesp() to free some SA allocated 1362 * for a policy. 1363 */ 1364 void 1365 key_freesav(struct secasvar **psav, const char* where, int tag) 1366 { 1367 struct secasvar *sav = *psav; 1368 unsigned int nv; 1369 1370 KASSERT(sav != NULL); 1371 1372 SA_DELREF2(sav, nv, where, tag); 1373 1374 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1375 "DP SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1376 sav, (u_long)ntohl(sav->spi), where, tag, nv); 1377 1378 if (nv == 0) { 1379 *psav = NULL; 1380 1381 /* remove from SA header */ 1382 KASSERT(__LIST_CHAINED(sav)); 1383 LIST_REMOVE(sav, chain); 1384 1385 key_delsav(sav); 1386 } 1387 } 1388 1389 /* %%% SPD management */ 1390 /* 1391 * free security policy entry. 1392 */ 1393 static void 1394 key_delsp(struct secpolicy *sp) 1395 { 1396 int s; 1397 1398 KASSERT(sp != NULL); 1399 1400 key_sp_dead(sp); 1401 1402 KASSERTMSG(sp->refcnt == 0, 1403 "SP with references deleted (refcnt %u)", sp->refcnt); 1404 1405 s = splsoftnet(); /*called from softclock()*/ 1406 1407 { 1408 struct ipsecrequest *isr = sp->req, *nextisr; 1409 1410 while (isr != NULL) { 1411 if (isr->sav != NULL) { 1412 KEY_FREESAV(&isr->sav); 1413 isr->sav = NULL; 1414 } 1415 1416 nextisr = isr->next; 1417 kmem_intr_free(isr, sizeof(*isr)); 1418 isr = nextisr; 1419 } 1420 } 1421 1422 kmem_intr_free(sp, sizeof(*sp)); 1423 1424 splx(s); 1425 } 1426 1427 /* 1428 * search SPD 1429 * OUT: NULL : not found 1430 * others : found, pointer to a SP. 1431 */ 1432 static struct secpolicy * 1433 key_getsp(const struct secpolicyindex *spidx) 1434 { 1435 struct secpolicy *sp; 1436 1437 KASSERT(spidx != NULL); 1438 1439 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1440 if (sp->state == IPSEC_SPSTATE_DEAD) 1441 continue; 1442 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1443 SP_ADDREF(sp); 1444 return sp; 1445 } 1446 } 1447 1448 return NULL; 1449 } 1450 1451 /* 1452 * get SP by index. 1453 * OUT: NULL : not found 1454 * others : found, pointer to a SP. 1455 */ 1456 static struct secpolicy * 1457 key_getspbyid(u_int32_t id) 1458 { 1459 struct secpolicy *sp; 1460 1461 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1462 if (sp->state == IPSEC_SPSTATE_DEAD) 1463 continue; 1464 if (sp->id == id) { 1465 SP_ADDREF(sp); 1466 return sp; 1467 } 1468 } 1469 1470 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1471 if (sp->state == IPSEC_SPSTATE_DEAD) 1472 continue; 1473 if (sp->id == id) { 1474 SP_ADDREF(sp); 1475 return sp; 1476 } 1477 } 1478 1479 return NULL; 1480 } 1481 1482 struct secpolicy * 1483 key_newsp(const char* where, int tag) 1484 { 1485 struct secpolicy *newsp = NULL; 1486 1487 newsp = kmem_intr_zalloc(sizeof(struct secpolicy), KM_NOSLEEP); 1488 if (newsp != NULL) 1489 newsp->refcnt = 1; 1490 1491 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1492 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1493 return newsp; 1494 } 1495 1496 /* 1497 * create secpolicy structure from sadb_x_policy structure. 1498 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1499 * so must be set properly later. 1500 */ 1501 struct secpolicy * 1502 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1503 { 1504 struct secpolicy *newsp; 1505 1506 KASSERT(!cpu_softintr_p()); 1507 KASSERT(xpl0 != NULL); 1508 KASSERT(len >= sizeof(*xpl0)); 1509 1510 if (len != PFKEY_EXTLEN(xpl0)) { 1511 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1512 *error = EINVAL; 1513 return NULL; 1514 } 1515 1516 newsp = KEY_NEWSP(); 1517 if (newsp == NULL) { 1518 *error = ENOBUFS; 1519 return NULL; 1520 } 1521 1522 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1523 newsp->policy = xpl0->sadb_x_policy_type; 1524 1525 /* check policy */ 1526 switch (xpl0->sadb_x_policy_type) { 1527 case IPSEC_POLICY_DISCARD: 1528 case IPSEC_POLICY_NONE: 1529 case IPSEC_POLICY_ENTRUST: 1530 case IPSEC_POLICY_BYPASS: 1531 newsp->req = NULL; 1532 *error = 0; 1533 return newsp; 1534 1535 case IPSEC_POLICY_IPSEC: 1536 /* Continued */ 1537 break; 1538 default: 1539 IPSECLOG(LOG_DEBUG, "invalid policy type.\n"); 1540 KEY_FREESP(&newsp); 1541 *error = EINVAL; 1542 return NULL; 1543 } 1544 1545 /* IPSEC_POLICY_IPSEC */ 1546 { 1547 int tlen; 1548 const struct sadb_x_ipsecrequest *xisr; 1549 uint16_t xisr_reqid; 1550 struct ipsecrequest **p_isr = &newsp->req; 1551 1552 /* validity check */ 1553 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1554 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1555 *error = EINVAL; 1556 goto free_exit; 1557 } 1558 1559 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1560 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1561 1562 while (tlen > 0) { 1563 /* length check */ 1564 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1565 IPSECLOG(LOG_DEBUG, "invalid ipsecrequest length.\n"); 1566 *error = EINVAL; 1567 goto free_exit; 1568 } 1569 1570 /* allocate request buffer */ 1571 *p_isr = kmem_zalloc(sizeof(**p_isr), KM_SLEEP); 1572 1573 /* set values */ 1574 (*p_isr)->next = NULL; 1575 1576 switch (xisr->sadb_x_ipsecrequest_proto) { 1577 case IPPROTO_ESP: 1578 case IPPROTO_AH: 1579 case IPPROTO_IPCOMP: 1580 break; 1581 default: 1582 IPSECLOG(LOG_DEBUG, "invalid proto type=%u\n", 1583 xisr->sadb_x_ipsecrequest_proto); 1584 *error = EPROTONOSUPPORT; 1585 goto free_exit; 1586 } 1587 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1588 1589 switch (xisr->sadb_x_ipsecrequest_mode) { 1590 case IPSEC_MODE_TRANSPORT: 1591 case IPSEC_MODE_TUNNEL: 1592 break; 1593 case IPSEC_MODE_ANY: 1594 default: 1595 IPSECLOG(LOG_DEBUG, "invalid mode=%u\n", 1596 xisr->sadb_x_ipsecrequest_mode); 1597 *error = EINVAL; 1598 goto free_exit; 1599 } 1600 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1601 1602 switch (xisr->sadb_x_ipsecrequest_level) { 1603 case IPSEC_LEVEL_DEFAULT: 1604 case IPSEC_LEVEL_USE: 1605 case IPSEC_LEVEL_REQUIRE: 1606 break; 1607 case IPSEC_LEVEL_UNIQUE: 1608 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1609 /* validity check */ 1610 /* 1611 * If range violation of reqid, kernel will 1612 * update it, don't refuse it. 1613 */ 1614 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1615 IPSECLOG(LOG_DEBUG, 1616 "reqid=%d range " 1617 "violation, updated by kernel.\n", 1618 xisr_reqid); 1619 xisr_reqid = 0; 1620 } 1621 1622 /* allocate new reqid id if reqid is zero. */ 1623 if (xisr_reqid == 0) { 1624 u_int16_t reqid = key_newreqid(); 1625 if (reqid == 0) { 1626 *error = ENOBUFS; 1627 goto free_exit; 1628 } 1629 (*p_isr)->saidx.reqid = reqid; 1630 } else { 1631 /* set it for manual keying. */ 1632 (*p_isr)->saidx.reqid = xisr_reqid; 1633 } 1634 break; 1635 1636 default: 1637 IPSECLOG(LOG_DEBUG, "invalid level=%u\n", 1638 xisr->sadb_x_ipsecrequest_level); 1639 *error = EINVAL; 1640 goto free_exit; 1641 } 1642 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1643 1644 /* set IP addresses if there */ 1645 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1646 const struct sockaddr *paddr; 1647 1648 paddr = (const struct sockaddr *)(xisr + 1); 1649 1650 /* validity check */ 1651 if (paddr->sa_len > sizeof((*p_isr)->saidx.src)) { 1652 IPSECLOG(LOG_DEBUG, "invalid request " 1653 "address length.\n"); 1654 *error = EINVAL; 1655 goto free_exit; 1656 } 1657 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1658 1659 paddr = (const struct sockaddr *)((const char *)paddr 1660 + paddr->sa_len); 1661 1662 /* validity check */ 1663 if (paddr->sa_len > sizeof((*p_isr)->saidx.dst)) { 1664 IPSECLOG(LOG_DEBUG, "invalid request " 1665 "address length.\n"); 1666 *error = EINVAL; 1667 goto free_exit; 1668 } 1669 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1670 } 1671 1672 (*p_isr)->sav = NULL; 1673 (*p_isr)->sp = newsp; 1674 1675 /* initialization for the next. */ 1676 p_isr = &(*p_isr)->next; 1677 tlen -= xisr->sadb_x_ipsecrequest_len; 1678 1679 /* validity check */ 1680 if (tlen < 0) { 1681 IPSECLOG(LOG_DEBUG, "becoming tlen < 0.\n"); 1682 *error = EINVAL; 1683 goto free_exit; 1684 } 1685 1686 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr + 1687 xisr->sadb_x_ipsecrequest_len); 1688 } 1689 } 1690 1691 *error = 0; 1692 return newsp; 1693 1694 free_exit: 1695 KEY_FREESP(&newsp); 1696 return NULL; 1697 } 1698 1699 static u_int16_t 1700 key_newreqid(void) 1701 { 1702 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1703 1704 auto_reqid = (auto_reqid == 0xffff ? 1705 IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1706 1707 /* XXX should be unique check */ 1708 1709 return auto_reqid; 1710 } 1711 1712 /* 1713 * copy secpolicy struct to sadb_x_policy structure indicated. 1714 */ 1715 struct mbuf * 1716 key_sp2msg(const struct secpolicy *sp) 1717 { 1718 struct sadb_x_policy *xpl; 1719 int tlen; 1720 char *p; 1721 struct mbuf *m; 1722 1723 KASSERT(sp != NULL); 1724 1725 tlen = key_getspreqmsglen(sp); 1726 1727 m = key_alloc_mbuf(tlen); 1728 if (!m || m->m_next) { /*XXX*/ 1729 if (m) 1730 m_freem(m); 1731 return NULL; 1732 } 1733 1734 m->m_len = tlen; 1735 m->m_next = NULL; 1736 xpl = mtod(m, struct sadb_x_policy *); 1737 memset(xpl, 0, tlen); 1738 1739 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1740 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1741 xpl->sadb_x_policy_type = sp->policy; 1742 xpl->sadb_x_policy_dir = sp->spidx.dir; 1743 xpl->sadb_x_policy_id = sp->id; 1744 p = (char *)xpl + sizeof(*xpl); 1745 1746 /* if is the policy for ipsec ? */ 1747 if (sp->policy == IPSEC_POLICY_IPSEC) { 1748 struct sadb_x_ipsecrequest *xisr; 1749 struct ipsecrequest *isr; 1750 1751 for (isr = sp->req; isr != NULL; isr = isr->next) { 1752 1753 xisr = (struct sadb_x_ipsecrequest *)p; 1754 1755 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1756 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1757 xisr->sadb_x_ipsecrequest_level = isr->level; 1758 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1759 1760 p += sizeof(*xisr); 1761 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1762 p += isr->saidx.src.sa.sa_len; 1763 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1764 p += isr->saidx.src.sa.sa_len; 1765 1766 xisr->sadb_x_ipsecrequest_len = 1767 PFKEY_ALIGN8(sizeof(*xisr) 1768 + isr->saidx.src.sa.sa_len 1769 + isr->saidx.dst.sa.sa_len); 1770 } 1771 } 1772 1773 return m; 1774 } 1775 1776 /* m will not be freed nor modified */ 1777 static struct mbuf * 1778 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1779 int ndeep, int nitem, ...) 1780 { 1781 va_list ap; 1782 int idx; 1783 int i; 1784 struct mbuf *result = NULL, *n; 1785 int len; 1786 1787 KASSERT(m != NULL); 1788 KASSERT(mhp != NULL); 1789 1790 va_start(ap, nitem); 1791 for (i = 0; i < nitem; i++) { 1792 idx = va_arg(ap, int); 1793 if (idx < 0 || idx > SADB_EXT_MAX) 1794 goto fail; 1795 /* don't attempt to pull empty extension */ 1796 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1797 continue; 1798 if (idx != SADB_EXT_RESERVED && 1799 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1800 continue; 1801 1802 if (idx == SADB_EXT_RESERVED) { 1803 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 1804 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1805 MGETHDR(n, M_DONTWAIT, MT_DATA); 1806 if (!n) 1807 goto fail; 1808 n->m_len = len; 1809 n->m_next = NULL; 1810 m_copydata(m, 0, sizeof(struct sadb_msg), 1811 mtod(n, void *)); 1812 } else if (i < ndeep) { 1813 len = mhp->extlen[idx]; 1814 n = key_alloc_mbuf(len); 1815 if (!n || n->m_next) { /*XXX*/ 1816 if (n) 1817 m_freem(n); 1818 goto fail; 1819 } 1820 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1821 mtod(n, void *)); 1822 } else { 1823 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1824 M_DONTWAIT); 1825 } 1826 if (n == NULL) 1827 goto fail; 1828 1829 if (result) 1830 m_cat(result, n); 1831 else 1832 result = n; 1833 } 1834 va_end(ap); 1835 1836 if (result && (result->m_flags & M_PKTHDR) != 0) { 1837 result->m_pkthdr.len = 0; 1838 for (n = result; n; n = n->m_next) 1839 result->m_pkthdr.len += n->m_len; 1840 } 1841 1842 return result; 1843 1844 fail: 1845 va_end(ap); 1846 m_freem(result); 1847 return NULL; 1848 } 1849 1850 /* 1851 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1852 * add an entry to SP database, when received 1853 * <base, address(SD), (lifetime(H),) policy> 1854 * from the user(?). 1855 * Adding to SP database, 1856 * and send 1857 * <base, address(SD), (lifetime(H),) policy> 1858 * to the socket which was send. 1859 * 1860 * SPDADD set a unique policy entry. 1861 * SPDSETIDX like SPDADD without a part of policy requests. 1862 * SPDUPDATE replace a unique policy entry. 1863 * 1864 * m will always be freed. 1865 */ 1866 static int 1867 key_api_spdadd(struct socket *so, struct mbuf *m, 1868 const struct sadb_msghdr *mhp) 1869 { 1870 const struct sockaddr *src, *dst; 1871 const struct sadb_x_policy *xpl0; 1872 struct sadb_x_policy *xpl; 1873 const struct sadb_lifetime *lft = NULL; 1874 struct secpolicyindex spidx; 1875 struct secpolicy *newsp; 1876 int error; 1877 1878 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1879 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1880 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1881 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1882 return key_senderror(so, m, EINVAL); 1883 } 1884 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1885 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1886 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1887 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1888 return key_senderror(so, m, EINVAL); 1889 } 1890 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1891 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < 1892 sizeof(struct sadb_lifetime)) { 1893 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1894 return key_senderror(so, m, EINVAL); 1895 } 1896 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1897 } 1898 1899 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1900 1901 /* checking the direciton. */ 1902 switch (xpl0->sadb_x_policy_dir) { 1903 case IPSEC_DIR_INBOUND: 1904 case IPSEC_DIR_OUTBOUND: 1905 break; 1906 default: 1907 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 1908 return key_senderror(so, m, EINVAL); 1909 } 1910 1911 /* check policy */ 1912 /* key_api_spdadd() accepts DISCARD, NONE and IPSEC. */ 1913 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST || 1914 xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1915 IPSECLOG(LOG_DEBUG, "Invalid policy type.\n"); 1916 return key_senderror(so, m, EINVAL); 1917 } 1918 1919 /* policy requests are mandatory when action is ipsec. */ 1920 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && 1921 xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 1922 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1923 IPSECLOG(LOG_DEBUG, "some policy requests part required.\n"); 1924 return key_senderror(so, m, EINVAL); 1925 } 1926 1927 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 1928 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 1929 1930 /* sanity check on addr pair */ 1931 if (src->sa_family != dst->sa_family) 1932 return key_senderror(so, m, EINVAL); 1933 if (src->sa_len != dst->sa_len) 1934 return key_senderror(so, m, EINVAL); 1935 1936 key_init_spidx_bymsghdr(&spidx, mhp); 1937 1938 /* 1939 * checking there is SP already or not. 1940 * SPDUPDATE doesn't depend on whether there is a SP or not. 1941 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1942 * then error. 1943 */ 1944 { 1945 struct secpolicy *sp; 1946 1947 sp = key_getsp(&spidx); 1948 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1949 if (sp) { 1950 key_sp_dead(sp); 1951 key_sp_unlink(sp); /* XXX jrs ordering */ 1952 KEY_FREESP(&sp); 1953 } 1954 } else { 1955 if (sp != NULL) { 1956 KEY_FREESP(&sp); 1957 IPSECLOG(LOG_DEBUG, "a SP entry exists already.\n"); 1958 return key_senderror(so, m, EEXIST); 1959 } 1960 } 1961 } 1962 1963 /* allocation new SP entry */ 1964 newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error); 1965 if (newsp == NULL) { 1966 return key_senderror(so, m, error); 1967 } 1968 1969 newsp->id = key_getnewspid(); 1970 if (newsp->id == 0) { 1971 kmem_free(newsp, sizeof(*newsp)); 1972 return key_senderror(so, m, ENOBUFS); 1973 } 1974 1975 newsp->spidx = spidx; 1976 newsp->created = time_uptime; 1977 newsp->lastused = newsp->created; 1978 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1979 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1980 1981 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1982 newsp->state = IPSEC_SPSTATE_ALIVE; 1983 if (newsp->policy == IPSEC_POLICY_IPSEC) 1984 KASSERT(newsp->req != NULL); 1985 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1986 1987 #ifdef notyet 1988 /* delete the entry in spacqtree */ 1989 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1990 struct secspacq *spacq = key_getspacq(&spidx); 1991 if (spacq != NULL) { 1992 /* reset counter in order to deletion by timehandler. */ 1993 spacq->created = time_uptime; 1994 spacq->count = 0; 1995 } 1996 } 1997 #endif 1998 1999 /* Invalidate all cached SPD pointers in the PCBs. */ 2000 ipsec_invalpcbcacheall(); 2001 2002 #if defined(GATEWAY) 2003 /* Invalidate the ipflow cache, as well. */ 2004 ipflow_invalidate_all(0); 2005 #ifdef INET6 2006 if (in6_present) 2007 ip6flow_invalidate_all(0); 2008 #endif /* INET6 */ 2009 #endif /* GATEWAY */ 2010 2011 { 2012 struct mbuf *n, *mpolicy; 2013 int off; 2014 2015 /* create new sadb_msg to reply. */ 2016 if (lft) { 2017 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 2018 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 2019 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2020 } else { 2021 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2022 SADB_X_EXT_POLICY, 2023 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2024 } 2025 if (!n) 2026 return key_senderror(so, m, ENOBUFS); 2027 2028 n = key_fill_replymsg(n, 0); 2029 if (n == NULL) 2030 return key_senderror(so, m, ENOBUFS); 2031 2032 off = 0; 2033 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2034 sizeof(*xpl), &off); 2035 if (mpolicy == NULL) { 2036 /* n is already freed */ 2037 return key_senderror(so, m, ENOBUFS); 2038 } 2039 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2040 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2041 m_freem(n); 2042 return key_senderror(so, m, EINVAL); 2043 } 2044 xpl->sadb_x_policy_id = newsp->id; 2045 2046 m_freem(m); 2047 key_update_used(); 2048 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2049 } 2050 } 2051 2052 /* 2053 * get new policy id. 2054 * OUT: 2055 * 0: failure. 2056 * others: success. 2057 */ 2058 static u_int32_t 2059 key_getnewspid(void) 2060 { 2061 u_int32_t newid = 0; 2062 int count = key_spi_trycnt; /* XXX */ 2063 struct secpolicy *sp; 2064 2065 /* when requesting to allocate spi ranged */ 2066 while (count--) { 2067 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2068 2069 sp = key_getspbyid(newid); 2070 if (sp == NULL) 2071 break; 2072 2073 KEY_FREESP(&sp); 2074 } 2075 2076 if (count == 0 || newid == 0) { 2077 IPSECLOG(LOG_DEBUG, "to allocate policy id is failed.\n"); 2078 return 0; 2079 } 2080 2081 return newid; 2082 } 2083 2084 /* 2085 * SADB_SPDDELETE processing 2086 * receive 2087 * <base, address(SD), policy(*)> 2088 * from the user(?), and set SADB_SASTATE_DEAD, 2089 * and send, 2090 * <base, address(SD), policy(*)> 2091 * to the ikmpd. 2092 * policy(*) including direction of policy. 2093 * 2094 * m will always be freed. 2095 */ 2096 static int 2097 key_api_spddelete(struct socket *so, struct mbuf *m, 2098 const struct sadb_msghdr *mhp) 2099 { 2100 struct sadb_x_policy *xpl0; 2101 struct secpolicyindex spidx; 2102 struct secpolicy *sp; 2103 2104 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2105 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2106 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2107 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2108 return key_senderror(so, m, EINVAL); 2109 } 2110 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2111 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2112 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2113 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2114 return key_senderror(so, m, EINVAL); 2115 } 2116 2117 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2118 2119 /* checking the direciton. */ 2120 switch (xpl0->sadb_x_policy_dir) { 2121 case IPSEC_DIR_INBOUND: 2122 case IPSEC_DIR_OUTBOUND: 2123 break; 2124 default: 2125 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2126 return key_senderror(so, m, EINVAL); 2127 } 2128 2129 /* make secindex */ 2130 key_init_spidx_bymsghdr(&spidx, mhp); 2131 2132 /* Is there SP in SPD ? */ 2133 sp = key_getsp(&spidx); 2134 if (sp == NULL) { 2135 IPSECLOG(LOG_DEBUG, "no SP found.\n"); 2136 return key_senderror(so, m, EINVAL); 2137 } 2138 2139 /* save policy id to buffer to be returned. */ 2140 xpl0->sadb_x_policy_id = sp->id; 2141 2142 key_sp_dead(sp); 2143 key_sp_unlink(sp); /* XXX jrs ordering */ 2144 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2145 2146 /* Invalidate all cached SPD pointers in the PCBs. */ 2147 ipsec_invalpcbcacheall(); 2148 2149 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2150 2151 { 2152 struct mbuf *n; 2153 2154 /* create new sadb_msg to reply. */ 2155 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2156 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2157 if (!n) 2158 return key_senderror(so, m, ENOBUFS); 2159 2160 n = key_fill_replymsg(n, 0); 2161 if (n == NULL) 2162 return key_senderror(so, m, ENOBUFS); 2163 2164 m_freem(m); 2165 key_update_used(); 2166 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2167 } 2168 } 2169 2170 /* 2171 * SADB_SPDDELETE2 processing 2172 * receive 2173 * <base, policy(*)> 2174 * from the user(?), and set SADB_SASTATE_DEAD, 2175 * and send, 2176 * <base, policy(*)> 2177 * to the ikmpd. 2178 * policy(*) including direction of policy. 2179 * 2180 * m will always be freed. 2181 */ 2182 static int 2183 key_api_spddelete2(struct socket *so, struct mbuf *m, 2184 const struct sadb_msghdr *mhp) 2185 { 2186 u_int32_t id; 2187 struct secpolicy *sp; 2188 2189 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2190 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2191 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2192 return key_senderror(so, m, EINVAL); 2193 } 2194 2195 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2196 2197 /* Is there SP in SPD ? */ 2198 sp = key_getspbyid(id); 2199 if (sp == NULL) { 2200 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2201 return key_senderror(so, m, EINVAL); 2202 } 2203 2204 key_sp_dead(sp); 2205 key_sp_unlink(sp); /* XXX jrs ordering */ 2206 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2207 sp = NULL; 2208 2209 /* Invalidate all cached SPD pointers in the PCBs. */ 2210 ipsec_invalpcbcacheall(); 2211 2212 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2213 2214 { 2215 struct mbuf *n, *nn; 2216 int off, len; 2217 2218 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 2219 2220 /* create new sadb_msg to reply. */ 2221 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2222 2223 MGETHDR(n, M_DONTWAIT, MT_DATA); 2224 if (n && len > MHLEN) { 2225 MCLGET(n, M_DONTWAIT); 2226 if ((n->m_flags & M_EXT) == 0) { 2227 m_freem(n); 2228 n = NULL; 2229 } 2230 } 2231 if (!n) 2232 return key_senderror(so, m, ENOBUFS); 2233 2234 n->m_len = len; 2235 n->m_next = NULL; 2236 off = 0; 2237 2238 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2239 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2240 2241 KASSERTMSG(off == len, "length inconsistency"); 2242 2243 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2244 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2245 if (!n->m_next) { 2246 m_freem(n); 2247 return key_senderror(so, m, ENOBUFS); 2248 } 2249 2250 n->m_pkthdr.len = 0; 2251 for (nn = n; nn; nn = nn->m_next) 2252 n->m_pkthdr.len += nn->m_len; 2253 2254 n = key_fill_replymsg(n, 0); 2255 if (n == NULL) 2256 return key_senderror(so, m, ENOBUFS); 2257 2258 m_freem(m); 2259 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2260 } 2261 } 2262 2263 /* 2264 * SADB_X_GET processing 2265 * receive 2266 * <base, policy(*)> 2267 * from the user(?), 2268 * and send, 2269 * <base, address(SD), policy> 2270 * to the ikmpd. 2271 * policy(*) including direction of policy. 2272 * 2273 * m will always be freed. 2274 */ 2275 static int 2276 key_api_spdget(struct socket *so, struct mbuf *m, 2277 const struct sadb_msghdr *mhp) 2278 { 2279 u_int32_t id; 2280 struct secpolicy *sp; 2281 struct mbuf *n; 2282 2283 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2284 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2285 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2286 return key_senderror(so, m, EINVAL); 2287 } 2288 2289 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2290 2291 /* Is there SP in SPD ? */ 2292 sp = key_getspbyid(id); 2293 if (sp == NULL) { 2294 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2295 return key_senderror(so, m, ENOENT); 2296 } 2297 2298 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2299 mhp->msg->sadb_msg_pid); 2300 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2301 if (n != NULL) { 2302 m_freem(m); 2303 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2304 } else 2305 return key_senderror(so, m, ENOBUFS); 2306 } 2307 2308 #ifdef notyet 2309 /* 2310 * SADB_X_SPDACQUIRE processing. 2311 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2312 * send 2313 * <base, policy(*)> 2314 * to KMD, and expect to receive 2315 * <base> with SADB_X_SPDACQUIRE if error occurred, 2316 * or 2317 * <base, policy> 2318 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2319 * policy(*) is without policy requests. 2320 * 2321 * 0 : succeed 2322 * others: error number 2323 */ 2324 int 2325 key_spdacquire(const struct secpolicy *sp) 2326 { 2327 struct mbuf *result = NULL, *m; 2328 struct secspacq *newspacq; 2329 int error; 2330 2331 KASSERT(sp != NULL); 2332 KASSERTMSG(sp->req == NULL, "called but there is request"); 2333 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2334 "policy mismathed. IPsec is expected"); 2335 2336 /* Get an entry to check whether sent message or not. */ 2337 newspacq = key_getspacq(&sp->spidx); 2338 if (newspacq != NULL) { 2339 if (key_blockacq_count < newspacq->count) { 2340 /* reset counter and do send message. */ 2341 newspacq->count = 0; 2342 } else { 2343 /* increment counter and do nothing. */ 2344 newspacq->count++; 2345 return 0; 2346 } 2347 } else { 2348 /* make new entry for blocking to send SADB_ACQUIRE. */ 2349 newspacq = key_newspacq(&sp->spidx); 2350 if (newspacq == NULL) 2351 return ENOBUFS; 2352 2353 /* add to acqtree */ 2354 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2355 } 2356 2357 /* create new sadb_msg to reply. */ 2358 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2359 if (!m) { 2360 error = ENOBUFS; 2361 goto fail; 2362 } 2363 result = m; 2364 2365 result->m_pkthdr.len = 0; 2366 for (m = result; m; m = m->m_next) 2367 result->m_pkthdr.len += m->m_len; 2368 2369 mtod(result, struct sadb_msg *)->sadb_msg_len = 2370 PFKEY_UNIT64(result->m_pkthdr.len); 2371 2372 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2373 2374 fail: 2375 if (result) 2376 m_freem(result); 2377 return error; 2378 } 2379 #endif /* notyet */ 2380 2381 /* 2382 * SADB_SPDFLUSH processing 2383 * receive 2384 * <base> 2385 * from the user, and free all entries in secpctree. 2386 * and send, 2387 * <base> 2388 * to the user. 2389 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2390 * 2391 * m will always be freed. 2392 */ 2393 static int 2394 key_api_spdflush(struct socket *so, struct mbuf *m, 2395 const struct sadb_msghdr *mhp) 2396 { 2397 struct sadb_msg *newmsg; 2398 struct secpolicy *sp; 2399 u_int dir; 2400 2401 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2402 return key_senderror(so, m, EINVAL); 2403 2404 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2405 struct secpolicy * nextsp; 2406 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 2407 if (sp->state == IPSEC_SPSTATE_DEAD) 2408 continue; 2409 key_sp_dead(sp); 2410 key_sp_unlink(sp); 2411 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2412 continue; 2413 } 2414 } 2415 2416 /* Invalidate all cached SPD pointers in the PCBs. */ 2417 ipsec_invalpcbcacheall(); 2418 2419 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2420 2421 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2422 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 2423 return key_senderror(so, m, ENOBUFS); 2424 } 2425 2426 if (m->m_next) 2427 m_freem(m->m_next); 2428 m->m_next = NULL; 2429 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2430 newmsg = mtod(m, struct sadb_msg *); 2431 newmsg->sadb_msg_errno = 0; 2432 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2433 2434 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2435 } 2436 2437 static struct sockaddr key_src = { 2438 .sa_len = 2, 2439 .sa_family = PF_KEY, 2440 }; 2441 2442 static struct mbuf * 2443 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2444 { 2445 struct secpolicy *sp; 2446 int cnt; 2447 u_int dir; 2448 struct mbuf *m, *n, *prev; 2449 int totlen; 2450 2451 *lenp = 0; 2452 2453 /* search SPD entry and get buffer size. */ 2454 cnt = 0; 2455 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2456 LIST_FOREACH(sp, &sptree[dir], chain) { 2457 cnt++; 2458 } 2459 } 2460 2461 if (cnt == 0) { 2462 *errorp = ENOENT; 2463 return (NULL); 2464 } 2465 2466 m = NULL; 2467 prev = m; 2468 totlen = 0; 2469 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2470 LIST_FOREACH(sp, &sptree[dir], chain) { 2471 --cnt; 2472 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2473 2474 if (!n) { 2475 *errorp = ENOBUFS; 2476 if (m) 2477 m_freem(m); 2478 return (NULL); 2479 } 2480 2481 totlen += n->m_pkthdr.len; 2482 if (!m) { 2483 m = n; 2484 } else { 2485 prev->m_nextpkt = n; 2486 } 2487 prev = n; 2488 } 2489 } 2490 2491 *lenp = totlen; 2492 *errorp = 0; 2493 return (m); 2494 } 2495 2496 /* 2497 * SADB_SPDDUMP processing 2498 * receive 2499 * <base> 2500 * from the user, and dump all SP leaves 2501 * and send, 2502 * <base> ..... 2503 * to the ikmpd. 2504 * 2505 * m will always be freed. 2506 */ 2507 static int 2508 key_api_spddump(struct socket *so, struct mbuf *m0, 2509 const struct sadb_msghdr *mhp) 2510 { 2511 struct mbuf *n; 2512 int error, len; 2513 int ok, s; 2514 pid_t pid; 2515 2516 pid = mhp->msg->sadb_msg_pid; 2517 /* 2518 * If the requestor has insufficient socket-buffer space 2519 * for the entire chain, nobody gets any response to the DUMP. 2520 * XXX For now, only the requestor ever gets anything. 2521 * Moreover, if the requestor has any space at all, they receive 2522 * the entire chain, otherwise the request is refused with ENOBUFS. 2523 */ 2524 if (sbspace(&so->so_rcv) <= 0) { 2525 return key_senderror(so, m0, ENOBUFS); 2526 } 2527 2528 s = splsoftnet(); 2529 n = key_setspddump_chain(&error, &len, pid); 2530 splx(s); 2531 2532 if (n == NULL) { 2533 return key_senderror(so, m0, ENOENT); 2534 } 2535 { 2536 uint64_t *ps = PFKEY_STAT_GETREF(); 2537 ps[PFKEY_STAT_IN_TOTAL]++; 2538 ps[PFKEY_STAT_IN_BYTES] += len; 2539 PFKEY_STAT_PUTREF(); 2540 } 2541 2542 /* 2543 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2544 * The requestor receives either the entire chain, or an 2545 * error message with ENOBUFS. 2546 */ 2547 2548 /* 2549 * sbappendchainwith record takes the chain of entries, one 2550 * packet-record per SPD entry, prepends the key_src sockaddr 2551 * to each packet-record, links the sockaddr mbufs into a new 2552 * list of records, then appends the entire resulting 2553 * list to the requesting socket. 2554 */ 2555 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 2556 SB_PRIO_ONESHOT_OVERFLOW); 2557 2558 if (!ok) { 2559 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2560 m_freem(n); 2561 return key_senderror(so, m0, ENOBUFS); 2562 } 2563 2564 m_freem(m0); 2565 return error; 2566 } 2567 2568 /* 2569 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2570 */ 2571 static int 2572 key_api_nat_map(struct socket *so, struct mbuf *m, 2573 const struct sadb_msghdr *mhp) 2574 { 2575 struct sadb_x_nat_t_type *type; 2576 struct sadb_x_nat_t_port *sport; 2577 struct sadb_x_nat_t_port *dport; 2578 struct sadb_address *iaddr, *raddr; 2579 struct sadb_x_nat_t_frag *frag; 2580 2581 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2582 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2583 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2584 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2585 return key_senderror(so, m, EINVAL); 2586 } 2587 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2588 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2589 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2590 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2591 return key_senderror(so, m, EINVAL); 2592 } 2593 2594 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2595 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2596 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2597 return key_senderror(so, m, EINVAL); 2598 } 2599 2600 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2601 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2602 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2603 return key_senderror(so, m, EINVAL); 2604 } 2605 2606 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2607 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2608 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2609 return key_senderror(so, m, EINVAL); 2610 } 2611 2612 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2613 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2614 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2615 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2616 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2617 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2618 2619 /* 2620 * XXX handle that, it should also contain a SA, or anything 2621 * that enable to update the SA information. 2622 */ 2623 2624 return 0; 2625 } 2626 2627 static struct mbuf * 2628 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2629 { 2630 struct mbuf *result = NULL, *m; 2631 2632 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2633 if (!m) 2634 goto fail; 2635 result = m; 2636 2637 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2638 &sp->spidx.src.sa, sp->spidx.prefs, sp->spidx.ul_proto); 2639 if (!m) 2640 goto fail; 2641 m_cat(result, m); 2642 2643 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2644 &sp->spidx.dst.sa, sp->spidx.prefd, sp->spidx.ul_proto); 2645 if (!m) 2646 goto fail; 2647 m_cat(result, m); 2648 2649 m = key_sp2msg(sp); 2650 if (!m) 2651 goto fail; 2652 m_cat(result, m); 2653 2654 if ((result->m_flags & M_PKTHDR) == 0) 2655 goto fail; 2656 2657 if (result->m_len < sizeof(struct sadb_msg)) { 2658 result = m_pullup(result, sizeof(struct sadb_msg)); 2659 if (result == NULL) 2660 goto fail; 2661 } 2662 2663 result->m_pkthdr.len = 0; 2664 for (m = result; m; m = m->m_next) 2665 result->m_pkthdr.len += m->m_len; 2666 2667 mtod(result, struct sadb_msg *)->sadb_msg_len = 2668 PFKEY_UNIT64(result->m_pkthdr.len); 2669 2670 return result; 2671 2672 fail: 2673 m_freem(result); 2674 return NULL; 2675 } 2676 2677 /* 2678 * get PFKEY message length for security policy and request. 2679 */ 2680 static u_int 2681 key_getspreqmsglen(const struct secpolicy *sp) 2682 { 2683 u_int tlen; 2684 2685 tlen = sizeof(struct sadb_x_policy); 2686 2687 /* if is the policy for ipsec ? */ 2688 if (sp->policy != IPSEC_POLICY_IPSEC) 2689 return tlen; 2690 2691 /* get length of ipsec requests */ 2692 { 2693 const struct ipsecrequest *isr; 2694 int len; 2695 2696 for (isr = sp->req; isr != NULL; isr = isr->next) { 2697 len = sizeof(struct sadb_x_ipsecrequest) 2698 + isr->saidx.src.sa.sa_len + isr->saidx.dst.sa.sa_len; 2699 2700 tlen += PFKEY_ALIGN8(len); 2701 } 2702 } 2703 2704 return tlen; 2705 } 2706 2707 /* 2708 * SADB_SPDEXPIRE processing 2709 * send 2710 * <base, address(SD), lifetime(CH), policy> 2711 * to KMD by PF_KEY. 2712 * 2713 * OUT: 0 : succeed 2714 * others : error number 2715 */ 2716 static int 2717 key_spdexpire(struct secpolicy *sp) 2718 { 2719 int s; 2720 struct mbuf *result = NULL, *m; 2721 int len; 2722 int error = -1; 2723 struct sadb_lifetime *lt; 2724 2725 /* XXX: Why do we lock ? */ 2726 s = splsoftnet(); /*called from softclock()*/ 2727 2728 KASSERT(sp != NULL); 2729 2730 /* set msg header */ 2731 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2732 if (!m) { 2733 error = ENOBUFS; 2734 goto fail; 2735 } 2736 result = m; 2737 2738 /* create lifetime extension (current and hard) */ 2739 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2740 m = key_alloc_mbuf(len); 2741 if (!m || m->m_next) { /*XXX*/ 2742 if (m) 2743 m_freem(m); 2744 error = ENOBUFS; 2745 goto fail; 2746 } 2747 memset(mtod(m, void *), 0, len); 2748 lt = mtod(m, struct sadb_lifetime *); 2749 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2750 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2751 lt->sadb_lifetime_allocations = 0; 2752 lt->sadb_lifetime_bytes = 0; 2753 lt->sadb_lifetime_addtime = time_mono_to_wall(sp->created); 2754 lt->sadb_lifetime_usetime = time_mono_to_wall(sp->lastused); 2755 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2756 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2757 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2758 lt->sadb_lifetime_allocations = 0; 2759 lt->sadb_lifetime_bytes = 0; 2760 lt->sadb_lifetime_addtime = sp->lifetime; 2761 lt->sadb_lifetime_usetime = sp->validtime; 2762 m_cat(result, m); 2763 2764 /* set sadb_address for source */ 2765 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sp->spidx.src.sa, 2766 sp->spidx.prefs, sp->spidx.ul_proto); 2767 if (!m) { 2768 error = ENOBUFS; 2769 goto fail; 2770 } 2771 m_cat(result, m); 2772 2773 /* set sadb_address for destination */ 2774 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sp->spidx.dst.sa, 2775 sp->spidx.prefd, sp->spidx.ul_proto); 2776 if (!m) { 2777 error = ENOBUFS; 2778 goto fail; 2779 } 2780 m_cat(result, m); 2781 2782 /* set secpolicy */ 2783 m = key_sp2msg(sp); 2784 if (!m) { 2785 error = ENOBUFS; 2786 goto fail; 2787 } 2788 m_cat(result, m); 2789 2790 if ((result->m_flags & M_PKTHDR) == 0) { 2791 error = EINVAL; 2792 goto fail; 2793 } 2794 2795 if (result->m_len < sizeof(struct sadb_msg)) { 2796 result = m_pullup(result, sizeof(struct sadb_msg)); 2797 if (result == NULL) { 2798 error = ENOBUFS; 2799 goto fail; 2800 } 2801 } 2802 2803 result->m_pkthdr.len = 0; 2804 for (m = result; m; m = m->m_next) 2805 result->m_pkthdr.len += m->m_len; 2806 2807 mtod(result, struct sadb_msg *)->sadb_msg_len = 2808 PFKEY_UNIT64(result->m_pkthdr.len); 2809 2810 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2811 2812 fail: 2813 if (result) 2814 m_freem(result); 2815 splx(s); 2816 return error; 2817 } 2818 2819 /* %%% SAD management */ 2820 /* 2821 * allocating a memory for new SA head, and copy from the values of mhp. 2822 * OUT: NULL : failure due to the lack of memory. 2823 * others : pointer to new SA head. 2824 */ 2825 static struct secashead * 2826 key_newsah(const struct secasindex *saidx) 2827 { 2828 struct secashead *newsah; 2829 int i; 2830 2831 KASSERT(saidx != NULL); 2832 2833 newsah = kmem_zalloc(sizeof(struct secashead), KM_SLEEP); 2834 for (i = 0; i < __arraycount(newsah->savtree); i++) 2835 LIST_INIT(&newsah->savtree[i]); 2836 newsah->saidx = *saidx; 2837 2838 /* add to saidxtree */ 2839 newsah->state = SADB_SASTATE_MATURE; 2840 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2841 2842 return newsah; 2843 } 2844 2845 /* 2846 * delete SA index and all SA registerd. 2847 */ 2848 static void 2849 key_delsah(struct secashead *sah) 2850 { 2851 struct secasvar *sav; 2852 u_int state; 2853 int s; 2854 int zombie = 0; 2855 2856 KASSERT(!cpu_softintr_p()); 2857 KASSERT(sah != NULL); 2858 2859 s = splsoftnet(); 2860 2861 /* searching all SA registerd in the secindex. */ 2862 SASTATE_ANY_FOREACH(state) { 2863 LIST_FOREACH(sav, &sah->savtree[state], chain) { 2864 /* give up to delete this sa */ 2865 zombie++; 2866 } 2867 } 2868 2869 /* don't delete sah only if there are savs. */ 2870 if (zombie) { 2871 splx(s); 2872 return; 2873 } 2874 2875 rtcache_free(&sah->sa_route); 2876 2877 /* remove from tree of SA index */ 2878 KASSERT(__LIST_CHAINED(sah)); 2879 LIST_REMOVE(sah, chain); 2880 2881 if (sah->idents != NULL) 2882 kmem_free(sah->idents, sah->idents_len); 2883 if (sah->identd != NULL) 2884 kmem_free(sah->identd, sah->identd_len); 2885 2886 kmem_free(sah, sizeof(*sah)); 2887 2888 splx(s); 2889 return; 2890 } 2891 2892 /* 2893 * allocating a new SA with LARVAL state. 2894 * key_api_add() and key_api_getspi() call, 2895 * and copy the values of mhp into new buffer. 2896 * When SAD message type is GETSPI: 2897 * to set sequence number from acq_seq++, 2898 * to set zero to SPI. 2899 * not to call key_setsava(). 2900 * OUT: NULL : fail 2901 * others : pointer to new secasvar. 2902 * 2903 * does not modify mbuf. does not free mbuf on error. 2904 */ 2905 static struct secasvar * 2906 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2907 int *errp, const char* where, int tag) 2908 { 2909 struct secasvar *newsav; 2910 const struct sadb_sa *xsa; 2911 2912 KASSERT(!cpu_softintr_p()); 2913 KASSERT(m != NULL); 2914 KASSERT(mhp != NULL); 2915 KASSERT(mhp->msg != NULL); 2916 2917 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 2918 2919 switch (mhp->msg->sadb_msg_type) { 2920 case SADB_GETSPI: 2921 newsav->spi = 0; 2922 2923 #ifdef IPSEC_DOSEQCHECK 2924 /* sync sequence number */ 2925 if (mhp->msg->sadb_msg_seq == 0) 2926 newsav->seq = 2927 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2928 else 2929 #endif 2930 newsav->seq = mhp->msg->sadb_msg_seq; 2931 break; 2932 2933 case SADB_ADD: 2934 /* sanity check */ 2935 if (mhp->ext[SADB_EXT_SA] == NULL) { 2936 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2937 *errp = EINVAL; 2938 goto error; 2939 } 2940 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2941 newsav->spi = xsa->sadb_sa_spi; 2942 newsav->seq = mhp->msg->sadb_msg_seq; 2943 break; 2944 default: 2945 *errp = EINVAL; 2946 goto error; 2947 } 2948 2949 /* copy sav values */ 2950 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2951 *errp = key_setsaval(newsav, m, mhp); 2952 if (*errp) 2953 goto error; 2954 } 2955 2956 /* reset created */ 2957 newsav->created = time_uptime; 2958 newsav->pid = mhp->msg->sadb_msg_pid; 2959 2960 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 2961 "DP from %s:%u return SA:%p\n", where, tag, newsav); 2962 return newsav; 2963 2964 error: 2965 KASSERT(*errp != 0); 2966 kmem_free(newsav, sizeof(*newsav)); 2967 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 2968 "DP from %s:%u return SA:NULL\n", where, tag); 2969 return NULL; 2970 } 2971 2972 2973 static void 2974 key_clear_xform(struct secasvar *sav) 2975 { 2976 2977 /* 2978 * Cleanup xform state. Note that zeroize'ing causes the 2979 * keys to be cleared; otherwise we must do it ourself. 2980 */ 2981 if (sav->tdb_xform != NULL) { 2982 sav->tdb_xform->xf_zeroize(sav); 2983 sav->tdb_xform = NULL; 2984 } else { 2985 if (sav->key_auth != NULL) 2986 explicit_memset(_KEYBUF(sav->key_auth), 0, 2987 _KEYLEN(sav->key_auth)); 2988 if (sav->key_enc != NULL) 2989 explicit_memset(_KEYBUF(sav->key_enc), 0, 2990 _KEYLEN(sav->key_enc)); 2991 } 2992 } 2993 2994 /* 2995 * free() SA variable entry. 2996 */ 2997 static void 2998 key_delsav(struct secasvar *sav) 2999 { 3000 3001 KASSERT(sav != NULL); 3002 KASSERTMSG(sav->refcnt == 0, "reference count %u > 0", sav->refcnt); 3003 3004 key_clear_xform(sav); 3005 key_freesaval(sav); 3006 kmem_intr_free(sav, sizeof(*sav)); 3007 3008 return; 3009 } 3010 3011 /* 3012 * search SAD. 3013 * OUT: 3014 * NULL : not found 3015 * others : found, pointer to a SA. 3016 */ 3017 static struct secashead * 3018 key_getsah(const struct secasindex *saidx, int flag) 3019 { 3020 struct secashead *sah; 3021 3022 LIST_FOREACH(sah, &sahtree, chain) { 3023 if (sah->state == SADB_SASTATE_DEAD) 3024 continue; 3025 if (key_saidx_match(&sah->saidx, saidx, flag)) 3026 return sah; 3027 } 3028 3029 return NULL; 3030 } 3031 3032 /* 3033 * check not to be duplicated SPI. 3034 * NOTE: this function is too slow due to searching all SAD. 3035 * OUT: 3036 * NULL : not found 3037 * others : found, pointer to a SA. 3038 */ 3039 static bool 3040 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3041 { 3042 struct secashead *sah; 3043 struct secasvar *sav; 3044 3045 /* check address family */ 3046 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3047 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 3048 return false; 3049 } 3050 3051 /* check all SAD */ 3052 LIST_FOREACH(sah, &sahtree, chain) { 3053 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3054 continue; 3055 sav = key_getsavbyspi(sah, spi); 3056 if (sav != NULL) { 3057 KEY_FREESAV(&sav); 3058 return true; 3059 } 3060 } 3061 3062 return false; 3063 } 3064 3065 /* 3066 * search SAD litmited alive SA, protocol, SPI. 3067 * OUT: 3068 * NULL : not found 3069 * others : found, pointer to a SA. 3070 */ 3071 static struct secasvar * 3072 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3073 { 3074 struct secasvar *sav; 3075 u_int state; 3076 3077 /* search all status */ 3078 SASTATE_ALIVE_FOREACH(state) { 3079 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3080 3081 /* sanity check */ 3082 if (sav->state != state) { 3083 IPSECLOG(LOG_DEBUG, 3084 "invalid sav->state (queue: %d SA: %d)\n", 3085 state, sav->state); 3086 continue; 3087 } 3088 3089 if (sav->spi == spi) { 3090 SA_ADDREF(sav); 3091 return sav; 3092 } 3093 } 3094 } 3095 3096 return NULL; 3097 } 3098 3099 /* 3100 * Free allocated data to member variables of sav: 3101 * sav->replay, sav->key_* and sav->lft_*. 3102 */ 3103 static void 3104 key_freesaval(struct secasvar *sav) 3105 { 3106 3107 KASSERT(sav->refcnt == 0); 3108 3109 if (sav->replay != NULL) 3110 kmem_intr_free(sav->replay, sav->replay_len); 3111 if (sav->key_auth != NULL) 3112 kmem_intr_free(sav->key_auth, sav->key_auth_len); 3113 if (sav->key_enc != NULL) 3114 kmem_intr_free(sav->key_enc, sav->key_enc_len); 3115 if (sav->lft_c != NULL) 3116 kmem_intr_free(sav->lft_c, sizeof(*(sav->lft_c))); 3117 if (sav->lft_h != NULL) 3118 kmem_intr_free(sav->lft_h, sizeof(*(sav->lft_h))); 3119 if (sav->lft_s != NULL) 3120 kmem_intr_free(sav->lft_s, sizeof(*(sav->lft_s))); 3121 } 3122 3123 /* 3124 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3125 * You must update these if need. 3126 * OUT: 0: success. 3127 * !0: failure. 3128 * 3129 * does not modify mbuf. does not free mbuf on error. 3130 */ 3131 static int 3132 key_setsaval(struct secasvar *sav, struct mbuf *m, 3133 const struct sadb_msghdr *mhp) 3134 { 3135 int error = 0; 3136 3137 KASSERT(!cpu_softintr_p()); 3138 KASSERT(m != NULL); 3139 KASSERT(mhp != NULL); 3140 KASSERT(mhp->msg != NULL); 3141 3142 /* We shouldn't initialize sav variables while someone uses it. */ 3143 KASSERT(sav->refcnt == 0); 3144 3145 /* SA */ 3146 if (mhp->ext[SADB_EXT_SA] != NULL) { 3147 const struct sadb_sa *sa0; 3148 3149 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3150 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3151 error = EINVAL; 3152 goto fail; 3153 } 3154 3155 sav->alg_auth = sa0->sadb_sa_auth; 3156 sav->alg_enc = sa0->sadb_sa_encrypt; 3157 sav->flags = sa0->sadb_sa_flags; 3158 3159 /* replay window */ 3160 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3161 size_t len = sizeof(struct secreplay) + 3162 sa0->sadb_sa_replay; 3163 sav->replay = kmem_zalloc(len, KM_SLEEP); 3164 sav->replay_len = len; 3165 if (sa0->sadb_sa_replay != 0) 3166 sav->replay->bitmap = (char*)(sav->replay+1); 3167 sav->replay->wsize = sa0->sadb_sa_replay; 3168 } 3169 } 3170 3171 /* Authentication keys */ 3172 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3173 const struct sadb_key *key0; 3174 int len; 3175 3176 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3177 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3178 3179 error = 0; 3180 if (len < sizeof(*key0)) { 3181 error = EINVAL; 3182 goto fail; 3183 } 3184 switch (mhp->msg->sadb_msg_satype) { 3185 case SADB_SATYPE_AH: 3186 case SADB_SATYPE_ESP: 3187 case SADB_X_SATYPE_TCPSIGNATURE: 3188 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3189 sav->alg_auth != SADB_X_AALG_NULL) 3190 error = EINVAL; 3191 break; 3192 case SADB_X_SATYPE_IPCOMP: 3193 default: 3194 error = EINVAL; 3195 break; 3196 } 3197 if (error) { 3198 IPSECLOG(LOG_DEBUG, "invalid key_auth values.\n"); 3199 goto fail; 3200 } 3201 3202 sav->key_auth = key_newbuf(key0, len); 3203 sav->key_auth_len = len; 3204 } 3205 3206 /* Encryption key */ 3207 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3208 const struct sadb_key *key0; 3209 int len; 3210 3211 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3212 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3213 3214 error = 0; 3215 if (len < sizeof(*key0)) { 3216 error = EINVAL; 3217 goto fail; 3218 } 3219 switch (mhp->msg->sadb_msg_satype) { 3220 case SADB_SATYPE_ESP: 3221 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3222 sav->alg_enc != SADB_EALG_NULL) { 3223 error = EINVAL; 3224 break; 3225 } 3226 sav->key_enc = key_newbuf(key0, len); 3227 sav->key_enc_len = len; 3228 break; 3229 case SADB_X_SATYPE_IPCOMP: 3230 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3231 error = EINVAL; 3232 sav->key_enc = NULL; /*just in case*/ 3233 break; 3234 case SADB_SATYPE_AH: 3235 case SADB_X_SATYPE_TCPSIGNATURE: 3236 default: 3237 error = EINVAL; 3238 break; 3239 } 3240 if (error) { 3241 IPSECLOG(LOG_DEBUG, "invalid key_enc value.\n"); 3242 goto fail; 3243 } 3244 } 3245 3246 /* set iv */ 3247 sav->ivlen = 0; 3248 3249 switch (mhp->msg->sadb_msg_satype) { 3250 case SADB_SATYPE_AH: 3251 error = xform_init(sav, XF_AH); 3252 break; 3253 case SADB_SATYPE_ESP: 3254 error = xform_init(sav, XF_ESP); 3255 break; 3256 case SADB_X_SATYPE_IPCOMP: 3257 error = xform_init(sav, XF_IPCOMP); 3258 break; 3259 case SADB_X_SATYPE_TCPSIGNATURE: 3260 error = xform_init(sav, XF_TCPSIGNATURE); 3261 break; 3262 } 3263 if (error) { 3264 IPSECLOG(LOG_DEBUG, "unable to initialize SA type %u.\n", 3265 mhp->msg->sadb_msg_satype); 3266 goto fail; 3267 } 3268 3269 /* reset created */ 3270 sav->created = time_uptime; 3271 3272 /* make lifetime for CURRENT */ 3273 sav->lft_c = kmem_alloc(sizeof(struct sadb_lifetime), KM_SLEEP); 3274 3275 sav->lft_c->sadb_lifetime_len = 3276 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3277 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3278 sav->lft_c->sadb_lifetime_allocations = 0; 3279 sav->lft_c->sadb_lifetime_bytes = 0; 3280 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3281 sav->lft_c->sadb_lifetime_usetime = 0; 3282 3283 /* lifetimes for HARD and SOFT */ 3284 { 3285 const struct sadb_lifetime *lft0; 3286 3287 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3288 if (lft0 != NULL) { 3289 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3290 error = EINVAL; 3291 goto fail; 3292 } 3293 sav->lft_h = key_newbuf(lft0, sizeof(*lft0)); 3294 } 3295 3296 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3297 if (lft0 != NULL) { 3298 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3299 error = EINVAL; 3300 goto fail; 3301 } 3302 sav->lft_s = key_newbuf(lft0, sizeof(*lft0)); 3303 /* to be initialize ? */ 3304 } 3305 } 3306 3307 return 0; 3308 3309 fail: 3310 key_clear_xform(sav); 3311 key_freesaval(sav); 3312 3313 return error; 3314 } 3315 3316 /* 3317 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3318 * OUT: 0: valid 3319 * other: errno 3320 */ 3321 static int 3322 key_init_xform(struct secasvar *sav) 3323 { 3324 int error; 3325 3326 /* We shouldn't initialize sav variables while someone uses it. */ 3327 KASSERT(sav->refcnt == 0); 3328 3329 /* check SPI value */ 3330 switch (sav->sah->saidx.proto) { 3331 case IPPROTO_ESP: 3332 case IPPROTO_AH: 3333 if (ntohl(sav->spi) <= 255) { 3334 IPSECLOG(LOG_DEBUG, "illegal range of SPI %u.\n", 3335 (u_int32_t)ntohl(sav->spi)); 3336 return EINVAL; 3337 } 3338 break; 3339 } 3340 3341 /* check satype */ 3342 switch (sav->sah->saidx.proto) { 3343 case IPPROTO_ESP: 3344 /* check flags */ 3345 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3346 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3347 IPSECLOG(LOG_DEBUG, 3348 "invalid flag (derived) given to old-esp.\n"); 3349 return EINVAL; 3350 } 3351 error = xform_init(sav, XF_ESP); 3352 break; 3353 case IPPROTO_AH: 3354 /* check flags */ 3355 if (sav->flags & SADB_X_EXT_DERIV) { 3356 IPSECLOG(LOG_DEBUG, 3357 "invalid flag (derived) given to AH SA.\n"); 3358 return EINVAL; 3359 } 3360 if (sav->alg_enc != SADB_EALG_NONE) { 3361 IPSECLOG(LOG_DEBUG, 3362 "protocol and algorithm mismated.\n"); 3363 return(EINVAL); 3364 } 3365 error = xform_init(sav, XF_AH); 3366 break; 3367 case IPPROTO_IPCOMP: 3368 if (sav->alg_auth != SADB_AALG_NONE) { 3369 IPSECLOG(LOG_DEBUG, 3370 "protocol and algorithm mismated.\n"); 3371 return(EINVAL); 3372 } 3373 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3374 && ntohl(sav->spi) >= 0x10000) { 3375 IPSECLOG(LOG_DEBUG, "invalid cpi for IPComp.\n"); 3376 return(EINVAL); 3377 } 3378 error = xform_init(sav, XF_IPCOMP); 3379 break; 3380 case IPPROTO_TCP: 3381 if (sav->alg_enc != SADB_EALG_NONE) { 3382 IPSECLOG(LOG_DEBUG, 3383 "protocol and algorithm mismated.\n"); 3384 return(EINVAL); 3385 } 3386 error = xform_init(sav, XF_TCPSIGNATURE); 3387 break; 3388 default: 3389 IPSECLOG(LOG_DEBUG, "Invalid satype.\n"); 3390 error = EPROTONOSUPPORT; 3391 break; 3392 } 3393 3394 return error; 3395 } 3396 3397 /* 3398 * subroutine for SADB_GET and SADB_DUMP. 3399 */ 3400 static struct mbuf * 3401 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3402 u_int32_t seq, u_int32_t pid) 3403 { 3404 struct mbuf *result = NULL, *tres = NULL, *m; 3405 int l = 0; 3406 int i; 3407 void *p; 3408 struct sadb_lifetime lt; 3409 int dumporder[] = { 3410 SADB_EXT_SA, SADB_X_EXT_SA2, 3411 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3412 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3413 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3414 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3415 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3416 SADB_X_EXT_NAT_T_TYPE, 3417 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3418 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3419 SADB_X_EXT_NAT_T_FRAG, 3420 3421 }; 3422 3423 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3424 if (m == NULL) 3425 goto fail; 3426 result = m; 3427 3428 for (i = __arraycount(dumporder) - 1; i >= 0; i--) { 3429 m = NULL; 3430 p = NULL; 3431 switch (dumporder[i]) { 3432 case SADB_EXT_SA: 3433 m = key_setsadbsa(sav); 3434 break; 3435 3436 case SADB_X_EXT_SA2: 3437 m = key_setsadbxsa2(sav->sah->saidx.mode, 3438 sav->replay ? sav->replay->count : 0, 3439 sav->sah->saidx.reqid); 3440 break; 3441 3442 case SADB_EXT_ADDRESS_SRC: 3443 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3444 &sav->sah->saidx.src.sa, 3445 FULLMASK, IPSEC_ULPROTO_ANY); 3446 break; 3447 3448 case SADB_EXT_ADDRESS_DST: 3449 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3450 &sav->sah->saidx.dst.sa, 3451 FULLMASK, IPSEC_ULPROTO_ANY); 3452 break; 3453 3454 case SADB_EXT_KEY_AUTH: 3455 if (!sav->key_auth) 3456 continue; 3457 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3458 p = sav->key_auth; 3459 break; 3460 3461 case SADB_EXT_KEY_ENCRYPT: 3462 if (!sav->key_enc) 3463 continue; 3464 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3465 p = sav->key_enc; 3466 break; 3467 3468 case SADB_EXT_LIFETIME_CURRENT: 3469 KASSERT(sav->lft_c != NULL); 3470 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3471 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3472 lt.sadb_lifetime_addtime = 3473 time_mono_to_wall(lt.sadb_lifetime_addtime); 3474 lt.sadb_lifetime_usetime = 3475 time_mono_to_wall(lt.sadb_lifetime_usetime); 3476 p = < 3477 break; 3478 3479 case SADB_EXT_LIFETIME_HARD: 3480 if (!sav->lft_h) 3481 continue; 3482 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3483 p = sav->lft_h; 3484 break; 3485 3486 case SADB_EXT_LIFETIME_SOFT: 3487 if (!sav->lft_s) 3488 continue; 3489 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3490 p = sav->lft_s; 3491 break; 3492 3493 case SADB_X_EXT_NAT_T_TYPE: 3494 m = key_setsadbxtype(sav->natt_type); 3495 break; 3496 3497 case SADB_X_EXT_NAT_T_DPORT: 3498 if (sav->natt_type == 0) 3499 continue; 3500 m = key_setsadbxport( 3501 key_portfromsaddr(&sav->sah->saidx.dst), 3502 SADB_X_EXT_NAT_T_DPORT); 3503 break; 3504 3505 case SADB_X_EXT_NAT_T_SPORT: 3506 if (sav->natt_type == 0) 3507 continue; 3508 m = key_setsadbxport( 3509 key_portfromsaddr(&sav->sah->saidx.src), 3510 SADB_X_EXT_NAT_T_SPORT); 3511 break; 3512 3513 case SADB_X_EXT_NAT_T_FRAG: 3514 /* don't send frag info if not set */ 3515 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3516 continue; 3517 m = key_setsadbxfrag(sav->esp_frag); 3518 break; 3519 3520 case SADB_X_EXT_NAT_T_OAI: 3521 case SADB_X_EXT_NAT_T_OAR: 3522 continue; 3523 3524 case SADB_EXT_ADDRESS_PROXY: 3525 case SADB_EXT_IDENTITY_SRC: 3526 case SADB_EXT_IDENTITY_DST: 3527 /* XXX: should we brought from SPD ? */ 3528 case SADB_EXT_SENSITIVITY: 3529 default: 3530 continue; 3531 } 3532 3533 KASSERT(!(m && p)); 3534 if (!m && !p) 3535 goto fail; 3536 if (p && tres) { 3537 M_PREPEND(tres, l, M_DONTWAIT); 3538 if (!tres) 3539 goto fail; 3540 memcpy(mtod(tres, void *), p, l); 3541 continue; 3542 } 3543 if (p) { 3544 m = key_alloc_mbuf(l); 3545 if (!m) 3546 goto fail; 3547 m_copyback(m, 0, l, p); 3548 } 3549 3550 if (tres) 3551 m_cat(m, tres); 3552 tres = m; 3553 } 3554 3555 m_cat(result, tres); 3556 tres = NULL; /* avoid free on error below */ 3557 3558 if (result->m_len < sizeof(struct sadb_msg)) { 3559 result = m_pullup(result, sizeof(struct sadb_msg)); 3560 if (result == NULL) 3561 goto fail; 3562 } 3563 3564 result->m_pkthdr.len = 0; 3565 for (m = result; m; m = m->m_next) 3566 result->m_pkthdr.len += m->m_len; 3567 3568 mtod(result, struct sadb_msg *)->sadb_msg_len = 3569 PFKEY_UNIT64(result->m_pkthdr.len); 3570 3571 return result; 3572 3573 fail: 3574 m_freem(result); 3575 m_freem(tres); 3576 return NULL; 3577 } 3578 3579 3580 /* 3581 * set a type in sadb_x_nat_t_type 3582 */ 3583 static struct mbuf * 3584 key_setsadbxtype(u_int16_t type) 3585 { 3586 struct mbuf *m; 3587 size_t len; 3588 struct sadb_x_nat_t_type *p; 3589 3590 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3591 3592 m = key_alloc_mbuf(len); 3593 if (!m || m->m_next) { /*XXX*/ 3594 if (m) 3595 m_freem(m); 3596 return NULL; 3597 } 3598 3599 p = mtod(m, struct sadb_x_nat_t_type *); 3600 3601 memset(p, 0, len); 3602 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3603 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3604 p->sadb_x_nat_t_type_type = type; 3605 3606 return m; 3607 } 3608 /* 3609 * set a port in sadb_x_nat_t_port. port is in network order 3610 */ 3611 static struct mbuf * 3612 key_setsadbxport(u_int16_t port, u_int16_t type) 3613 { 3614 struct mbuf *m; 3615 size_t len; 3616 struct sadb_x_nat_t_port *p; 3617 3618 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3619 3620 m = key_alloc_mbuf(len); 3621 if (!m || m->m_next) { /*XXX*/ 3622 if (m) 3623 m_freem(m); 3624 return NULL; 3625 } 3626 3627 p = mtod(m, struct sadb_x_nat_t_port *); 3628 3629 memset(p, 0, len); 3630 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3631 p->sadb_x_nat_t_port_exttype = type; 3632 p->sadb_x_nat_t_port_port = port; 3633 3634 return m; 3635 } 3636 3637 /* 3638 * set fragmentation info in sadb_x_nat_t_frag 3639 */ 3640 static struct mbuf * 3641 key_setsadbxfrag(u_int16_t flen) 3642 { 3643 struct mbuf *m; 3644 size_t len; 3645 struct sadb_x_nat_t_frag *p; 3646 3647 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3648 3649 m = key_alloc_mbuf(len); 3650 if (!m || m->m_next) { /*XXX*/ 3651 if (m) 3652 m_freem(m); 3653 return NULL; 3654 } 3655 3656 p = mtod(m, struct sadb_x_nat_t_frag *); 3657 3658 memset(p, 0, len); 3659 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3660 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3661 p->sadb_x_nat_t_frag_fraglen = flen; 3662 3663 return m; 3664 } 3665 3666 /* 3667 * Get port from sockaddr, port is in network order 3668 */ 3669 u_int16_t 3670 key_portfromsaddr(const union sockaddr_union *saddr) 3671 { 3672 u_int16_t port; 3673 3674 switch (saddr->sa.sa_family) { 3675 case AF_INET: { 3676 port = saddr->sin.sin_port; 3677 break; 3678 } 3679 #ifdef INET6 3680 case AF_INET6: { 3681 port = saddr->sin6.sin6_port; 3682 break; 3683 } 3684 #endif 3685 default: 3686 printf("%s: unexpected address family\n", __func__); 3687 port = 0; 3688 break; 3689 } 3690 3691 return port; 3692 } 3693 3694 3695 /* 3696 * Set port is struct sockaddr. port is in network order 3697 */ 3698 static void 3699 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3700 { 3701 switch (saddr->sa.sa_family) { 3702 case AF_INET: { 3703 saddr->sin.sin_port = port; 3704 break; 3705 } 3706 #ifdef INET6 3707 case AF_INET6: { 3708 saddr->sin6.sin6_port = port; 3709 break; 3710 } 3711 #endif 3712 default: 3713 printf("%s: unexpected address family %d\n", __func__, 3714 saddr->sa.sa_family); 3715 break; 3716 } 3717 3718 return; 3719 } 3720 3721 /* 3722 * Safety check sa_len 3723 */ 3724 static int 3725 key_checksalen(const union sockaddr_union *saddr) 3726 { 3727 switch (saddr->sa.sa_family) { 3728 case AF_INET: 3729 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3730 return -1; 3731 break; 3732 #ifdef INET6 3733 case AF_INET6: 3734 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3735 return -1; 3736 break; 3737 #endif 3738 default: 3739 printf("%s: unexpected sa_family %d\n", __func__, 3740 saddr->sa.sa_family); 3741 return -1; 3742 break; 3743 } 3744 return 0; 3745 } 3746 3747 3748 /* 3749 * set data into sadb_msg. 3750 */ 3751 static struct mbuf * 3752 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3753 u_int32_t seq, pid_t pid, u_int16_t reserved) 3754 { 3755 struct mbuf *m; 3756 struct sadb_msg *p; 3757 int len; 3758 3759 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 3760 3761 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3762 3763 MGETHDR(m, M_DONTWAIT, MT_DATA); 3764 if (m && len > MHLEN) { 3765 MCLGET(m, M_DONTWAIT); 3766 if ((m->m_flags & M_EXT) == 0) { 3767 m_freem(m); 3768 m = NULL; 3769 } 3770 } 3771 if (!m) 3772 return NULL; 3773 m->m_pkthdr.len = m->m_len = len; 3774 m->m_next = NULL; 3775 3776 p = mtod(m, struct sadb_msg *); 3777 3778 memset(p, 0, len); 3779 p->sadb_msg_version = PF_KEY_V2; 3780 p->sadb_msg_type = type; 3781 p->sadb_msg_errno = 0; 3782 p->sadb_msg_satype = satype; 3783 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3784 p->sadb_msg_reserved = reserved; 3785 p->sadb_msg_seq = seq; 3786 p->sadb_msg_pid = (u_int32_t)pid; 3787 3788 return m; 3789 } 3790 3791 /* 3792 * copy secasvar data into sadb_address. 3793 */ 3794 static struct mbuf * 3795 key_setsadbsa(struct secasvar *sav) 3796 { 3797 struct mbuf *m; 3798 struct sadb_sa *p; 3799 int len; 3800 3801 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3802 m = key_alloc_mbuf(len); 3803 if (!m || m->m_next) { /*XXX*/ 3804 if (m) 3805 m_freem(m); 3806 return NULL; 3807 } 3808 3809 p = mtod(m, struct sadb_sa *); 3810 3811 memset(p, 0, len); 3812 p->sadb_sa_len = PFKEY_UNIT64(len); 3813 p->sadb_sa_exttype = SADB_EXT_SA; 3814 p->sadb_sa_spi = sav->spi; 3815 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3816 p->sadb_sa_state = sav->state; 3817 p->sadb_sa_auth = sav->alg_auth; 3818 p->sadb_sa_encrypt = sav->alg_enc; 3819 p->sadb_sa_flags = sav->flags; 3820 3821 return m; 3822 } 3823 3824 /* 3825 * set data into sadb_address. 3826 */ 3827 static struct mbuf * 3828 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3829 u_int8_t prefixlen, u_int16_t ul_proto) 3830 { 3831 struct mbuf *m; 3832 struct sadb_address *p; 3833 size_t len; 3834 3835 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3836 PFKEY_ALIGN8(saddr->sa_len); 3837 m = key_alloc_mbuf(len); 3838 if (!m || m->m_next) { /*XXX*/ 3839 if (m) 3840 m_freem(m); 3841 return NULL; 3842 } 3843 3844 p = mtod(m, struct sadb_address *); 3845 3846 memset(p, 0, len); 3847 p->sadb_address_len = PFKEY_UNIT64(len); 3848 p->sadb_address_exttype = exttype; 3849 p->sadb_address_proto = ul_proto; 3850 if (prefixlen == FULLMASK) { 3851 switch (saddr->sa_family) { 3852 case AF_INET: 3853 prefixlen = sizeof(struct in_addr) << 3; 3854 break; 3855 case AF_INET6: 3856 prefixlen = sizeof(struct in6_addr) << 3; 3857 break; 3858 default: 3859 ; /*XXX*/ 3860 } 3861 } 3862 p->sadb_address_prefixlen = prefixlen; 3863 p->sadb_address_reserved = 0; 3864 3865 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3866 saddr, saddr->sa_len); 3867 3868 return m; 3869 } 3870 3871 #if 0 3872 /* 3873 * set data into sadb_ident. 3874 */ 3875 static struct mbuf * 3876 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3877 void *string, int stringlen, u_int64_t id) 3878 { 3879 struct mbuf *m; 3880 struct sadb_ident *p; 3881 size_t len; 3882 3883 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3884 m = key_alloc_mbuf(len); 3885 if (!m || m->m_next) { /*XXX*/ 3886 if (m) 3887 m_freem(m); 3888 return NULL; 3889 } 3890 3891 p = mtod(m, struct sadb_ident *); 3892 3893 memset(p, 0, len); 3894 p->sadb_ident_len = PFKEY_UNIT64(len); 3895 p->sadb_ident_exttype = exttype; 3896 p->sadb_ident_type = idtype; 3897 p->sadb_ident_reserved = 0; 3898 p->sadb_ident_id = id; 3899 3900 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3901 string, stringlen); 3902 3903 return m; 3904 } 3905 #endif 3906 3907 /* 3908 * set data into sadb_x_sa2. 3909 */ 3910 static struct mbuf * 3911 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 3912 { 3913 struct mbuf *m; 3914 struct sadb_x_sa2 *p; 3915 size_t len; 3916 3917 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3918 m = key_alloc_mbuf(len); 3919 if (!m || m->m_next) { /*XXX*/ 3920 if (m) 3921 m_freem(m); 3922 return NULL; 3923 } 3924 3925 p = mtod(m, struct sadb_x_sa2 *); 3926 3927 memset(p, 0, len); 3928 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3929 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3930 p->sadb_x_sa2_mode = mode; 3931 p->sadb_x_sa2_reserved1 = 0; 3932 p->sadb_x_sa2_reserved2 = 0; 3933 p->sadb_x_sa2_sequence = seq; 3934 p->sadb_x_sa2_reqid = reqid; 3935 3936 return m; 3937 } 3938 3939 /* 3940 * set data into sadb_x_policy 3941 */ 3942 static struct mbuf * 3943 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3944 { 3945 struct mbuf *m; 3946 struct sadb_x_policy *p; 3947 size_t len; 3948 3949 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3950 m = key_alloc_mbuf(len); 3951 if (!m || m->m_next) { /*XXX*/ 3952 if (m) 3953 m_freem(m); 3954 return NULL; 3955 } 3956 3957 p = mtod(m, struct sadb_x_policy *); 3958 3959 memset(p, 0, len); 3960 p->sadb_x_policy_len = PFKEY_UNIT64(len); 3961 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3962 p->sadb_x_policy_type = type; 3963 p->sadb_x_policy_dir = dir; 3964 p->sadb_x_policy_id = id; 3965 3966 return m; 3967 } 3968 3969 /* %%% utilities */ 3970 /* 3971 * copy a buffer into the new buffer allocated. 3972 */ 3973 static void * 3974 key_newbuf(const void *src, u_int len) 3975 { 3976 void *new; 3977 3978 new = kmem_alloc(len, KM_SLEEP); 3979 memcpy(new, src, len); 3980 3981 return new; 3982 } 3983 3984 /* compare my own address 3985 * OUT: 1: true, i.e. my address. 3986 * 0: false 3987 */ 3988 int 3989 key_ismyaddr(const struct sockaddr *sa) 3990 { 3991 #ifdef INET 3992 const struct sockaddr_in *sin; 3993 const struct in_ifaddr *ia; 3994 int s; 3995 #endif 3996 3997 KASSERT(sa != NULL); 3998 3999 switch (sa->sa_family) { 4000 #ifdef INET 4001 case AF_INET: 4002 sin = (const struct sockaddr_in *)sa; 4003 s = pserialize_read_enter(); 4004 IN_ADDRLIST_READER_FOREACH(ia) { 4005 if (sin->sin_family == ia->ia_addr.sin_family && 4006 sin->sin_len == ia->ia_addr.sin_len && 4007 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4008 { 4009 pserialize_read_exit(s); 4010 return 1; 4011 } 4012 } 4013 pserialize_read_exit(s); 4014 break; 4015 #endif 4016 #ifdef INET6 4017 case AF_INET6: 4018 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4019 #endif 4020 } 4021 4022 return 0; 4023 } 4024 4025 #ifdef INET6 4026 /* 4027 * compare my own address for IPv6. 4028 * 1: ours 4029 * 0: other 4030 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4031 */ 4032 #include <netinet6/in6_var.h> 4033 4034 static int 4035 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4036 { 4037 struct in6_ifaddr *ia; 4038 int s; 4039 struct psref psref; 4040 int bound; 4041 int ours = 1; 4042 4043 bound = curlwp_bind(); 4044 s = pserialize_read_enter(); 4045 IN6_ADDRLIST_READER_FOREACH(ia) { 4046 bool ingroup; 4047 4048 if (key_sockaddr_match((const struct sockaddr *)&sin6, 4049 (const struct sockaddr *)&ia->ia_addr, 0)) { 4050 pserialize_read_exit(s); 4051 goto ours; 4052 } 4053 ia6_acquire(ia, &psref); 4054 pserialize_read_exit(s); 4055 4056 /* 4057 * XXX Multicast 4058 * XXX why do we care about multlicast here while we don't care 4059 * about IPv4 multicast?? 4060 * XXX scope 4061 */ 4062 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4063 if (ingroup) { 4064 ia6_release(ia, &psref); 4065 goto ours; 4066 } 4067 4068 s = pserialize_read_enter(); 4069 ia6_release(ia, &psref); 4070 } 4071 pserialize_read_exit(s); 4072 4073 /* loopback, just for safety */ 4074 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4075 goto ours; 4076 4077 ours = 0; 4078 ours: 4079 curlwp_bindx(bound); 4080 4081 return ours; 4082 } 4083 #endif /*INET6*/ 4084 4085 /* 4086 * compare two secasindex structure. 4087 * flag can specify to compare 2 saidxes. 4088 * compare two secasindex structure without both mode and reqid. 4089 * don't compare port. 4090 * IN: 4091 * saidx0: source, it can be in SAD. 4092 * saidx1: object. 4093 * OUT: 4094 * 1 : equal 4095 * 0 : not equal 4096 */ 4097 static int 4098 key_saidx_match( 4099 const struct secasindex *saidx0, 4100 const struct secasindex *saidx1, 4101 int flag) 4102 { 4103 int chkport; 4104 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4105 4106 KASSERT(saidx0 != NULL); 4107 KASSERT(saidx1 != NULL); 4108 4109 /* sanity */ 4110 if (saidx0->proto != saidx1->proto) 4111 return 0; 4112 4113 if (flag == CMP_EXACTLY) { 4114 if (saidx0->mode != saidx1->mode) 4115 return 0; 4116 if (saidx0->reqid != saidx1->reqid) 4117 return 0; 4118 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4119 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4120 return 0; 4121 } else { 4122 4123 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4124 if (flag == CMP_MODE_REQID ||flag == CMP_REQID) { 4125 /* 4126 * If reqid of SPD is non-zero, unique SA is required. 4127 * The result must be of same reqid in this case. 4128 */ 4129 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4130 return 0; 4131 } 4132 4133 if (flag == CMP_MODE_REQID) { 4134 if (saidx0->mode != IPSEC_MODE_ANY && 4135 saidx0->mode != saidx1->mode) 4136 return 0; 4137 } 4138 4139 4140 sa0src = &saidx0->src.sa; 4141 sa0dst = &saidx0->dst.sa; 4142 sa1src = &saidx1->src.sa; 4143 sa1dst = &saidx1->dst.sa; 4144 /* 4145 * If NAT-T is enabled, check ports for tunnel mode. 4146 * Don't do it for transport mode, as there is no 4147 * port information available in the SP. 4148 * Also don't check ports if they are set to zero 4149 * in the SPD: This means we have a non-generated 4150 * SPD which can't know UDP ports. 4151 */ 4152 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4153 chkport = PORT_LOOSE; 4154 else 4155 chkport = PORT_NONE; 4156 4157 if (!key_sockaddr_match(sa0src, sa1src, chkport)) { 4158 return 0; 4159 } 4160 if (!key_sockaddr_match(sa0dst, sa1dst, chkport)) { 4161 return 0; 4162 } 4163 } 4164 4165 return 1; 4166 } 4167 4168 /* 4169 * compare two secindex structure exactly. 4170 * IN: 4171 * spidx0: source, it is often in SPD. 4172 * spidx1: object, it is often from PFKEY message. 4173 * OUT: 4174 * 1 : equal 4175 * 0 : not equal 4176 */ 4177 static int 4178 key_spidx_match_exactly( 4179 const struct secpolicyindex *spidx0, 4180 const struct secpolicyindex *spidx1) 4181 { 4182 4183 KASSERT(spidx0 != NULL); 4184 KASSERT(spidx1 != NULL); 4185 4186 /* sanity */ 4187 if (spidx0->prefs != spidx1->prefs || 4188 spidx0->prefd != spidx1->prefd || 4189 spidx0->ul_proto != spidx1->ul_proto) 4190 return 0; 4191 4192 return key_sockaddr_match(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) && 4193 key_sockaddr_match(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT); 4194 } 4195 4196 /* 4197 * compare two secindex structure with mask. 4198 * IN: 4199 * spidx0: source, it is often in SPD. 4200 * spidx1: object, it is often from IP header. 4201 * OUT: 4202 * 1 : equal 4203 * 0 : not equal 4204 */ 4205 static int 4206 key_spidx_match_withmask( 4207 const struct secpolicyindex *spidx0, 4208 const struct secpolicyindex *spidx1) 4209 { 4210 4211 KASSERT(spidx0 != NULL); 4212 KASSERT(spidx1 != NULL); 4213 4214 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4215 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4216 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4217 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4218 return 0; 4219 4220 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4221 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY && 4222 spidx0->ul_proto != spidx1->ul_proto) 4223 return 0; 4224 4225 switch (spidx0->src.sa.sa_family) { 4226 case AF_INET: 4227 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY && 4228 spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4229 return 0; 4230 if (!key_bb_match_withmask(&spidx0->src.sin.sin_addr, 4231 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4232 return 0; 4233 break; 4234 case AF_INET6: 4235 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY && 4236 spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4237 return 0; 4238 /* 4239 * scope_id check. if sin6_scope_id is 0, we regard it 4240 * as a wildcard scope, which matches any scope zone ID. 4241 */ 4242 if (spidx0->src.sin6.sin6_scope_id && 4243 spidx1->src.sin6.sin6_scope_id && 4244 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4245 return 0; 4246 if (!key_bb_match_withmask(&spidx0->src.sin6.sin6_addr, 4247 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4248 return 0; 4249 break; 4250 default: 4251 /* XXX */ 4252 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4253 return 0; 4254 break; 4255 } 4256 4257 switch (spidx0->dst.sa.sa_family) { 4258 case AF_INET: 4259 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY && 4260 spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4261 return 0; 4262 if (!key_bb_match_withmask(&spidx0->dst.sin.sin_addr, 4263 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4264 return 0; 4265 break; 4266 case AF_INET6: 4267 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY && 4268 spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4269 return 0; 4270 /* 4271 * scope_id check. if sin6_scope_id is 0, we regard it 4272 * as a wildcard scope, which matches any scope zone ID. 4273 */ 4274 if (spidx0->src.sin6.sin6_scope_id && 4275 spidx1->src.sin6.sin6_scope_id && 4276 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4277 return 0; 4278 if (!key_bb_match_withmask(&spidx0->dst.sin6.sin6_addr, 4279 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4280 return 0; 4281 break; 4282 default: 4283 /* XXX */ 4284 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4285 return 0; 4286 break; 4287 } 4288 4289 /* XXX Do we check other field ? e.g. flowinfo */ 4290 4291 return 1; 4292 } 4293 4294 /* returns 0 on match */ 4295 static int 4296 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4297 { 4298 switch (howport) { 4299 case PORT_NONE: 4300 return 0; 4301 case PORT_LOOSE: 4302 if (port1 == 0 || port2 == 0) 4303 return 0; 4304 /*FALLTHROUGH*/ 4305 case PORT_STRICT: 4306 if (port1 != port2) { 4307 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4308 "port fail %d != %d\n", port1, port2); 4309 return 1; 4310 } 4311 return 0; 4312 default: 4313 KASSERT(0); 4314 return 1; 4315 } 4316 } 4317 4318 /* returns 1 on match */ 4319 static int 4320 key_sockaddr_match( 4321 const struct sockaddr *sa1, 4322 const struct sockaddr *sa2, 4323 int howport) 4324 { 4325 const struct sockaddr_in *sin1, *sin2; 4326 const struct sockaddr_in6 *sin61, *sin62; 4327 4328 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4329 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4330 "fam/len fail %d != %d || %d != %d\n", 4331 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4332 sa2->sa_len); 4333 return 0; 4334 } 4335 4336 switch (sa1->sa_family) { 4337 case AF_INET: 4338 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4339 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4340 "len fail %d != %zu\n", 4341 sa1->sa_len, sizeof(struct sockaddr_in)); 4342 return 0; 4343 } 4344 sin1 = (const struct sockaddr_in *)sa1; 4345 sin2 = (const struct sockaddr_in *)sa2; 4346 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4347 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4348 "addr fail %#x != %#x\n", 4349 sin1->sin_addr.s_addr, sin2->sin_addr.s_addr); 4350 return 0; 4351 } 4352 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4353 return 0; 4354 } 4355 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4356 "addr success %#x[%d] == %#x[%d]\n", 4357 sin1->sin_addr.s_addr, sin1->sin_port, 4358 sin2->sin_addr.s_addr, sin2->sin_port); 4359 break; 4360 case AF_INET6: 4361 sin61 = (const struct sockaddr_in6 *)sa1; 4362 sin62 = (const struct sockaddr_in6 *)sa2; 4363 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4364 return 0; /*EINVAL*/ 4365 4366 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4367 return 0; 4368 } 4369 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4370 return 0; 4371 } 4372 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4373 return 0; 4374 } 4375 break; 4376 default: 4377 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4378 return 0; 4379 break; 4380 } 4381 4382 return 1; 4383 } 4384 4385 /* 4386 * compare two buffers with mask. 4387 * IN: 4388 * addr1: source 4389 * addr2: object 4390 * bits: Number of bits to compare 4391 * OUT: 4392 * 1 : equal 4393 * 0 : not equal 4394 */ 4395 static int 4396 key_bb_match_withmask(const void *a1, const void *a2, u_int bits) 4397 { 4398 const unsigned char *p1 = a1; 4399 const unsigned char *p2 = a2; 4400 4401 /* XXX: This could be considerably faster if we compare a word 4402 * at a time, but it is complicated on LSB Endian machines */ 4403 4404 /* Handle null pointers */ 4405 if (p1 == NULL || p2 == NULL) 4406 return (p1 == p2); 4407 4408 while (bits >= 8) { 4409 if (*p1++ != *p2++) 4410 return 0; 4411 bits -= 8; 4412 } 4413 4414 if (bits > 0) { 4415 u_int8_t mask = ~((1<<(8-bits))-1); 4416 if ((*p1 & mask) != (*p2 & mask)) 4417 return 0; 4418 } 4419 return 1; /* Match! */ 4420 } 4421 4422 static void 4423 key_timehandler_spd(time_t now) 4424 { 4425 u_int dir; 4426 struct secpolicy *sp, *nextsp; 4427 4428 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4429 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 4430 if (sp->state == IPSEC_SPSTATE_DEAD) { 4431 key_sp_unlink(sp); /*XXX*/ 4432 4433 /* 'sp' dead; continue transfers to 4434 * 'sp = nextsp' 4435 */ 4436 continue; 4437 } 4438 4439 if (sp->lifetime == 0 && sp->validtime == 0) 4440 continue; 4441 4442 /* the deletion will occur next time */ 4443 if ((sp->lifetime && now - sp->created > sp->lifetime) || 4444 (sp->validtime && now - sp->lastused > sp->validtime)) { 4445 key_sp_dead(sp); 4446 key_spdexpire(sp); 4447 continue; 4448 } 4449 } 4450 } 4451 } 4452 4453 static void 4454 key_timehandler_sad(time_t now) 4455 { 4456 struct secashead *sah, *nextsah; 4457 struct secasvar *sav, *nextsav; 4458 4459 LIST_FOREACH_SAFE(sah, &sahtree, chain, nextsah) { 4460 /* if sah has been dead, then delete it and process next sah. */ 4461 if (sah->state == SADB_SASTATE_DEAD) { 4462 key_delsah(sah); 4463 continue; 4464 } 4465 4466 /* if LARVAL entry doesn't become MATURE, delete it. */ 4467 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], 4468 chain, nextsav) { 4469 if (now - sav->created > key_larval_lifetime) { 4470 KEY_FREESAV(&sav); 4471 } 4472 } 4473 4474 /* 4475 * check MATURE entry to start to send expire message 4476 * whether or not. 4477 */ 4478 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], 4479 chain, nextsav) { 4480 /* we don't need to check. */ 4481 if (sav->lft_s == NULL) 4482 continue; 4483 4484 /* sanity check */ 4485 KASSERT(sav->lft_c != NULL); 4486 4487 /* check SOFT lifetime */ 4488 if (sav->lft_s->sadb_lifetime_addtime != 0 && 4489 now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4490 /* 4491 * check SA to be used whether or not. 4492 * when SA hasn't been used, delete it. 4493 */ 4494 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4495 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4496 KEY_FREESAV(&sav); 4497 } else { 4498 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4499 /* 4500 * XXX If we keep to send expire 4501 * message in the status of 4502 * DYING. Do remove below code. 4503 */ 4504 key_expire(sav); 4505 } 4506 } 4507 /* check SOFT lifetime by bytes */ 4508 /* 4509 * XXX I don't know the way to delete this SA 4510 * when new SA is installed. Caution when it's 4511 * installed too big lifetime by time. 4512 */ 4513 else if (sav->lft_s->sadb_lifetime_bytes != 0 && 4514 sav->lft_s->sadb_lifetime_bytes < 4515 sav->lft_c->sadb_lifetime_bytes) { 4516 4517 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4518 /* 4519 * XXX If we keep to send expire 4520 * message in the status of 4521 * DYING. Do remove below code. 4522 */ 4523 key_expire(sav); 4524 } 4525 } 4526 4527 /* check DYING entry to change status to DEAD. */ 4528 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], 4529 chain, nextsav) { 4530 /* we don't need to check. */ 4531 if (sav->lft_h == NULL) 4532 continue; 4533 4534 /* sanity check */ 4535 KASSERT(sav->lft_c != NULL); 4536 4537 if (sav->lft_h->sadb_lifetime_addtime != 0 && 4538 now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4539 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4540 KEY_FREESAV(&sav); 4541 } 4542 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4543 else if (sav->lft_s != NULL 4544 && sav->lft_s->sadb_lifetime_addtime != 0 4545 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4546 /* 4547 * XXX: should be checked to be 4548 * installed the valid SA. 4549 */ 4550 4551 /* 4552 * If there is no SA then sending 4553 * expire message. 4554 */ 4555 key_expire(sav); 4556 } 4557 #endif 4558 /* check HARD lifetime by bytes */ 4559 else if (sav->lft_h->sadb_lifetime_bytes != 0 && 4560 sav->lft_h->sadb_lifetime_bytes < 4561 sav->lft_c->sadb_lifetime_bytes) { 4562 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4563 KEY_FREESAV(&sav); 4564 } 4565 } 4566 4567 /* delete entry in DEAD */ 4568 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], 4569 chain, nextsav) { 4570 /* sanity check */ 4571 if (sav->state != SADB_SASTATE_DEAD) { 4572 IPSECLOG(LOG_DEBUG, 4573 "invalid sav->state (queue: %d SA: %d): " 4574 "kill it anyway\n", 4575 SADB_SASTATE_DEAD, sav->state); 4576 } 4577 4578 /* 4579 * do not call key_freesav() here. 4580 * sav should already be freed, and sav->refcnt 4581 * shows other references to sav 4582 * (such as from SPD). 4583 */ 4584 } 4585 } 4586 } 4587 4588 static void 4589 key_timehandler_acq(time_t now) 4590 { 4591 #ifndef IPSEC_NONBLOCK_ACQUIRE 4592 struct secacq *acq, *nextacq; 4593 4594 restart: 4595 mutex_enter(&key_mtx); 4596 LIST_FOREACH_SAFE(acq, &acqtree, chain, nextacq) { 4597 if (now - acq->created > key_blockacq_lifetime) { 4598 LIST_REMOVE(acq, chain); 4599 mutex_exit(&key_mtx); 4600 kmem_free(acq, sizeof(*acq)); 4601 goto restart; 4602 } 4603 } 4604 mutex_exit(&key_mtx); 4605 #endif 4606 } 4607 4608 static void 4609 key_timehandler_spacq(time_t now) 4610 { 4611 #ifdef notyet 4612 struct secspacq *acq, *nextacq; 4613 4614 LIST_FOREACH_SAFE(acq, &spacqtree, chain, nextacq) { 4615 if (now - acq->created > key_blockacq_lifetime) { 4616 KASSERT(__LIST_CHAINED(acq)); 4617 LIST_REMOVE(acq, chain); 4618 kmem_free(acq, sizeof(*acq)); 4619 } 4620 } 4621 #endif 4622 } 4623 4624 /* 4625 * time handler. 4626 * scanning SPD and SAD to check status for each entries, 4627 * and do to remove or to expire. 4628 */ 4629 static void 4630 key_timehandler_work(struct work *wk, void *arg) 4631 { 4632 int s; 4633 time_t now = time_uptime; 4634 4635 s = splsoftnet(); 4636 mutex_enter(softnet_lock); 4637 4638 key_timehandler_spd(now); 4639 key_timehandler_sad(now); 4640 key_timehandler_acq(now); 4641 key_timehandler_spacq(now); 4642 4643 /* do exchange to tick time !! */ 4644 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4645 4646 mutex_exit(softnet_lock); 4647 splx(s); 4648 return; 4649 } 4650 4651 static void 4652 key_timehandler(void *arg) 4653 { 4654 4655 workqueue_enqueue(key_timehandler_wq, &key_timehandler_wk, NULL); 4656 } 4657 4658 u_long 4659 key_random(void) 4660 { 4661 u_long value; 4662 4663 key_randomfill(&value, sizeof(value)); 4664 return value; 4665 } 4666 4667 void 4668 key_randomfill(void *p, size_t l) 4669 { 4670 4671 cprng_fast(p, l); 4672 } 4673 4674 /* 4675 * map SADB_SATYPE_* to IPPROTO_*. 4676 * if satype == SADB_SATYPE then satype is mapped to ~0. 4677 * OUT: 4678 * 0: invalid satype. 4679 */ 4680 static u_int16_t 4681 key_satype2proto(u_int8_t satype) 4682 { 4683 switch (satype) { 4684 case SADB_SATYPE_UNSPEC: 4685 return IPSEC_PROTO_ANY; 4686 case SADB_SATYPE_AH: 4687 return IPPROTO_AH; 4688 case SADB_SATYPE_ESP: 4689 return IPPROTO_ESP; 4690 case SADB_X_SATYPE_IPCOMP: 4691 return IPPROTO_IPCOMP; 4692 case SADB_X_SATYPE_TCPSIGNATURE: 4693 return IPPROTO_TCP; 4694 default: 4695 return 0; 4696 } 4697 /* NOTREACHED */ 4698 } 4699 4700 /* 4701 * map IPPROTO_* to SADB_SATYPE_* 4702 * OUT: 4703 * 0: invalid protocol type. 4704 */ 4705 static u_int8_t 4706 key_proto2satype(u_int16_t proto) 4707 { 4708 switch (proto) { 4709 case IPPROTO_AH: 4710 return SADB_SATYPE_AH; 4711 case IPPROTO_ESP: 4712 return SADB_SATYPE_ESP; 4713 case IPPROTO_IPCOMP: 4714 return SADB_X_SATYPE_IPCOMP; 4715 case IPPROTO_TCP: 4716 return SADB_X_SATYPE_TCPSIGNATURE; 4717 default: 4718 return 0; 4719 } 4720 /* NOTREACHED */ 4721 } 4722 4723 static int 4724 key_setsecasidx(int proto, int mode, int reqid, 4725 const struct sockaddr *src, const struct sockaddr *dst, 4726 struct secasindex * saidx) 4727 { 4728 const union sockaddr_union *src_u = (const union sockaddr_union *)src; 4729 const union sockaddr_union *dst_u = (const union sockaddr_union *)dst; 4730 4731 /* sa len safety check */ 4732 if (key_checksalen(src_u) != 0) 4733 return -1; 4734 if (key_checksalen(dst_u) != 0) 4735 return -1; 4736 4737 memset(saidx, 0, sizeof(*saidx)); 4738 saidx->proto = proto; 4739 saidx->mode = mode; 4740 saidx->reqid = reqid; 4741 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4742 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4743 4744 key_porttosaddr(&((saidx)->src), 0); 4745 key_porttosaddr(&((saidx)->dst), 0); 4746 return 0; 4747 } 4748 4749 static void 4750 key_init_spidx_bymsghdr(struct secpolicyindex *spidx, 4751 const struct sadb_msghdr *mhp) 4752 { 4753 const struct sadb_address *src0, *dst0; 4754 const struct sockaddr *src, *dst; 4755 const struct sadb_x_policy *xpl0; 4756 4757 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 4758 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 4759 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4760 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4761 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 4762 4763 memset(spidx, 0, sizeof(*spidx)); 4764 spidx->dir = xpl0->sadb_x_policy_dir; 4765 spidx->prefs = src0->sadb_address_prefixlen; 4766 spidx->prefd = dst0->sadb_address_prefixlen; 4767 spidx->ul_proto = src0->sadb_address_proto; 4768 /* XXX boundary check against sa_len */ 4769 memcpy(&spidx->src, src, src->sa_len); 4770 memcpy(&spidx->dst, dst, dst->sa_len); 4771 } 4772 4773 /* %%% PF_KEY */ 4774 /* 4775 * SADB_GETSPI processing is to receive 4776 * <base, (SA2), src address, dst address, (SPI range)> 4777 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4778 * tree with the status of LARVAL, and send 4779 * <base, SA(*), address(SD)> 4780 * to the IKMPd. 4781 * 4782 * IN: mhp: pointer to the pointer to each header. 4783 * OUT: NULL if fail. 4784 * other if success, return pointer to the message to send. 4785 */ 4786 static int 4787 key_api_getspi(struct socket *so, struct mbuf *m, 4788 const struct sadb_msghdr *mhp) 4789 { 4790 const struct sockaddr *src, *dst; 4791 struct secasindex saidx; 4792 struct secashead *newsah; 4793 struct secasvar *newsav; 4794 u_int8_t proto; 4795 u_int32_t spi; 4796 u_int8_t mode; 4797 u_int16_t reqid; 4798 int error; 4799 4800 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4801 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4802 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4803 return key_senderror(so, m, EINVAL); 4804 } 4805 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4806 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4807 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4808 return key_senderror(so, m, EINVAL); 4809 } 4810 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4811 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4812 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4813 } else { 4814 mode = IPSEC_MODE_ANY; 4815 reqid = 0; 4816 } 4817 4818 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4819 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4820 4821 /* map satype to proto */ 4822 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 4823 if (proto == 0) { 4824 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 4825 return key_senderror(so, m, EINVAL); 4826 } 4827 4828 4829 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 4830 if (error != 0) 4831 return key_senderror(so, m, EINVAL); 4832 4833 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 4834 if (error != 0) 4835 return key_senderror(so, m, EINVAL); 4836 4837 /* SPI allocation */ 4838 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4839 &saidx); 4840 if (spi == 0) 4841 return key_senderror(so, m, EINVAL); 4842 4843 /* get a SA index */ 4844 newsah = key_getsah(&saidx, CMP_REQID); 4845 if (newsah == NULL) { 4846 /* create a new SA index */ 4847 newsah = key_newsah(&saidx); 4848 if (newsah == NULL) { 4849 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 4850 return key_senderror(so, m, ENOBUFS); 4851 } 4852 } 4853 4854 /* get a new SA */ 4855 /* XXX rewrite */ 4856 newsav = KEY_NEWSAV(m, mhp, &error); 4857 if (newsav == NULL) { 4858 /* XXX don't free new SA index allocated in above. */ 4859 return key_senderror(so, m, error); 4860 } 4861 4862 /* set spi */ 4863 newsav->spi = htonl(spi); 4864 4865 /* add to satree */ 4866 newsav->refcnt = 1; 4867 newsav->sah = newsah; 4868 newsav->state = SADB_SASTATE_LARVAL; 4869 LIST_INSERT_TAIL(&newsah->savtree[SADB_SASTATE_LARVAL], newsav, 4870 secasvar, chain); 4871 4872 #ifndef IPSEC_NONBLOCK_ACQUIRE 4873 /* delete the entry in acqtree */ 4874 if (mhp->msg->sadb_msg_seq != 0) { 4875 struct secacq *acq; 4876 mutex_enter(&key_mtx); 4877 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 4878 if (acq != NULL) { 4879 /* reset counter in order to deletion by timehandler. */ 4880 acq->created = time_uptime; 4881 acq->count = 0; 4882 } 4883 mutex_exit(&key_mtx); 4884 } 4885 #endif 4886 4887 { 4888 struct mbuf *n, *nn; 4889 struct sadb_sa *m_sa; 4890 int off, len; 4891 4892 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4893 PFKEY_ALIGN8(sizeof(struct sadb_sa)) <= MCLBYTES); 4894 4895 /* create new sadb_msg to reply. */ 4896 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4897 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4898 4899 MGETHDR(n, M_DONTWAIT, MT_DATA); 4900 if (len > MHLEN) { 4901 MCLGET(n, M_DONTWAIT); 4902 if ((n->m_flags & M_EXT) == 0) { 4903 m_freem(n); 4904 n = NULL; 4905 } 4906 } 4907 if (!n) 4908 return key_senderror(so, m, ENOBUFS); 4909 4910 n->m_len = len; 4911 n->m_next = NULL; 4912 off = 0; 4913 4914 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4915 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4916 4917 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4918 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4919 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4920 m_sa->sadb_sa_spi = htonl(spi); 4921 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4922 4923 KASSERTMSG(off == len, "length inconsistency"); 4924 4925 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4926 SADB_EXT_ADDRESS_DST); 4927 if (!n->m_next) { 4928 m_freem(n); 4929 return key_senderror(so, m, ENOBUFS); 4930 } 4931 4932 if (n->m_len < sizeof(struct sadb_msg)) { 4933 n = m_pullup(n, sizeof(struct sadb_msg)); 4934 if (n == NULL) 4935 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4936 } 4937 4938 n->m_pkthdr.len = 0; 4939 for (nn = n; nn; nn = nn->m_next) 4940 n->m_pkthdr.len += nn->m_len; 4941 4942 key_fill_replymsg(n, newsav->seq); 4943 4944 m_freem(m); 4945 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4946 } 4947 } 4948 4949 /* 4950 * allocating new SPI 4951 * called by key_api_getspi(). 4952 * OUT: 4953 * 0: failure. 4954 * others: success. 4955 */ 4956 static u_int32_t 4957 key_do_getnewspi(const struct sadb_spirange *spirange, 4958 const struct secasindex *saidx) 4959 { 4960 u_int32_t newspi; 4961 u_int32_t spmin, spmax; 4962 int count = key_spi_trycnt; 4963 4964 /* set spi range to allocate */ 4965 if (spirange != NULL) { 4966 spmin = spirange->sadb_spirange_min; 4967 spmax = spirange->sadb_spirange_max; 4968 } else { 4969 spmin = key_spi_minval; 4970 spmax = key_spi_maxval; 4971 } 4972 /* IPCOMP needs 2-byte SPI */ 4973 if (saidx->proto == IPPROTO_IPCOMP) { 4974 u_int32_t t; 4975 if (spmin >= 0x10000) 4976 spmin = 0xffff; 4977 if (spmax >= 0x10000) 4978 spmax = 0xffff; 4979 if (spmin > spmax) { 4980 t = spmin; spmin = spmax; spmax = t; 4981 } 4982 } 4983 4984 if (spmin == spmax) { 4985 if (key_checkspidup(saidx, htonl(spmin))) { 4986 IPSECLOG(LOG_DEBUG, "SPI %u exists already.\n", spmin); 4987 return 0; 4988 } 4989 4990 count--; /* taking one cost. */ 4991 newspi = spmin; 4992 4993 } else { 4994 4995 /* init SPI */ 4996 newspi = 0; 4997 4998 /* when requesting to allocate spi ranged */ 4999 while (count--) { 5000 /* generate pseudo-random SPI value ranged. */ 5001 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5002 5003 if (!key_checkspidup(saidx, htonl(newspi))) 5004 break; 5005 } 5006 5007 if (count == 0 || newspi == 0) { 5008 IPSECLOG(LOG_DEBUG, "to allocate spi is failed.\n"); 5009 return 0; 5010 } 5011 } 5012 5013 /* statistics */ 5014 keystat.getspi_count = 5015 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5016 5017 return newspi; 5018 } 5019 5020 static int 5021 key_handle_natt_info(struct secasvar *sav, 5022 const struct sadb_msghdr *mhp) 5023 { 5024 const char *msg = "?" ; 5025 struct sadb_x_nat_t_type *type; 5026 struct sadb_x_nat_t_port *sport, *dport; 5027 struct sadb_address *iaddr, *raddr; 5028 struct sadb_x_nat_t_frag *frag; 5029 5030 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5031 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5032 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5033 return 0; 5034 5035 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5036 msg = "TYPE"; 5037 goto bad; 5038 } 5039 5040 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5041 msg = "SPORT"; 5042 goto bad; 5043 } 5044 5045 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5046 msg = "DPORT"; 5047 goto bad; 5048 } 5049 5050 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5051 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5052 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5053 msg = "OAI"; 5054 goto bad; 5055 } 5056 } 5057 5058 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5059 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5060 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5061 msg = "OAR"; 5062 goto bad; 5063 } 5064 } 5065 5066 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5067 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5068 msg = "FRAG"; 5069 goto bad; 5070 } 5071 } 5072 5073 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5074 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5075 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5076 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5077 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5078 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5079 5080 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5081 type->sadb_x_nat_t_type_type, 5082 ntohs(sport->sadb_x_nat_t_port_port), 5083 ntohs(dport->sadb_x_nat_t_port_port)); 5084 5085 sav->natt_type = type->sadb_x_nat_t_type_type; 5086 key_porttosaddr(&sav->sah->saidx.src, sport->sadb_x_nat_t_port_port); 5087 key_porttosaddr(&sav->sah->saidx.dst, dport->sadb_x_nat_t_port_port); 5088 if (frag) 5089 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5090 else 5091 sav->esp_frag = IP_MAXPACKET; 5092 5093 return 0; 5094 bad: 5095 IPSECLOG(LOG_DEBUG, "invalid message %s\n", msg); 5096 __USE(msg); 5097 return -1; 5098 } 5099 5100 /* Just update the IPSEC_NAT_T ports if present */ 5101 static int 5102 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5103 const struct sadb_msghdr *mhp) 5104 { 5105 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5106 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5107 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5108 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5109 5110 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5111 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5112 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5113 struct sadb_x_nat_t_type *type; 5114 struct sadb_x_nat_t_port *sport; 5115 struct sadb_x_nat_t_port *dport; 5116 5117 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5118 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5119 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5120 IPSECLOG(LOG_DEBUG, "invalid message\n"); 5121 return -1; 5122 } 5123 5124 type = (struct sadb_x_nat_t_type *) 5125 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5126 sport = (struct sadb_x_nat_t_port *) 5127 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5128 dport = (struct sadb_x_nat_t_port *) 5129 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5130 5131 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5132 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5133 5134 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5135 type->sadb_x_nat_t_type_type, 5136 ntohs(sport->sadb_x_nat_t_port_port), 5137 ntohs(dport->sadb_x_nat_t_port_port)); 5138 } 5139 5140 return 0; 5141 } 5142 5143 5144 /* 5145 * SADB_UPDATE processing 5146 * receive 5147 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5148 * key(AE), (identity(SD),) (sensitivity)> 5149 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5150 * and send 5151 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5152 * (identity(SD),) (sensitivity)> 5153 * to the ikmpd. 5154 * 5155 * m will always be freed. 5156 */ 5157 static int 5158 key_api_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5159 { 5160 struct sadb_sa *sa0; 5161 const struct sockaddr *src, *dst; 5162 struct secasindex saidx; 5163 struct secashead *sah; 5164 struct secasvar *sav, *newsav; 5165 u_int16_t proto; 5166 u_int8_t mode; 5167 u_int16_t reqid; 5168 int error; 5169 5170 /* map satype to proto */ 5171 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5172 if (proto == 0) { 5173 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5174 return key_senderror(so, m, EINVAL); 5175 } 5176 5177 if (mhp->ext[SADB_EXT_SA] == NULL || 5178 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5179 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5180 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5181 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5182 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5183 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5184 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5185 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5186 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5187 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5188 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5189 return key_senderror(so, m, EINVAL); 5190 } 5191 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5192 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5193 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5194 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5195 return key_senderror(so, m, EINVAL); 5196 } 5197 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5198 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5199 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5200 } else { 5201 mode = IPSEC_MODE_ANY; 5202 reqid = 0; 5203 } 5204 /* XXX boundary checking for other extensions */ 5205 5206 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5207 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5208 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5209 5210 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5211 if (error != 0) 5212 return key_senderror(so, m, EINVAL); 5213 5214 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5215 if (error != 0) 5216 return key_senderror(so, m, EINVAL); 5217 5218 /* get a SA header */ 5219 sah = key_getsah(&saidx, CMP_REQID); 5220 if (sah == NULL) { 5221 IPSECLOG(LOG_DEBUG, "no SA index found.\n"); 5222 return key_senderror(so, m, ENOENT); 5223 } 5224 5225 /* set spidx if there */ 5226 /* XXX rewrite */ 5227 error = key_setident(sah, m, mhp); 5228 if (error) 5229 return key_senderror(so, m, error); 5230 5231 /* find a SA with sequence number. */ 5232 #ifdef IPSEC_DOSEQCHECK 5233 if (mhp->msg->sadb_msg_seq != 0) { 5234 sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq); 5235 if (sav == NULL) { 5236 IPSECLOG(LOG_DEBUG, 5237 "no larval SA with sequence %u exists.\n", 5238 mhp->msg->sadb_msg_seq); 5239 return key_senderror(so, m, ENOENT); 5240 } 5241 } 5242 #else 5243 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5244 if (sav == NULL) { 5245 IPSECLOG(LOG_DEBUG, "no such a SA found (spi:%u)\n", 5246 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5247 return key_senderror(so, m, EINVAL); 5248 } 5249 #endif 5250 5251 /* validity check */ 5252 if (sav->sah->saidx.proto != proto) { 5253 IPSECLOG(LOG_DEBUG, "protocol mismatched (DB=%u param=%u)\n", 5254 sav->sah->saidx.proto, proto); 5255 error = EINVAL; 5256 goto error; 5257 } 5258 #ifdef IPSEC_DOSEQCHECK 5259 if (sav->spi != sa0->sadb_sa_spi) { 5260 IPSECLOG(LOG_DEBUG, "SPI mismatched (DB:%u param:%u)\n", 5261 (u_int32_t)ntohl(sav->spi), 5262 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5263 error = EINVAL; 5264 goto error; 5265 } 5266 #endif 5267 if (sav->pid != mhp->msg->sadb_msg_pid) { 5268 IPSECLOG(LOG_DEBUG, "pid mismatched (DB:%u param:%u)\n", 5269 sav->pid, mhp->msg->sadb_msg_pid); 5270 error = EINVAL; 5271 goto error; 5272 } 5273 5274 /* 5275 * Allocate a new SA instead of modifying the existing SA directly 5276 * to avoid race conditions. 5277 */ 5278 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 5279 5280 /* copy sav values */ 5281 newsav->spi = sav->spi; 5282 newsav->seq = sav->seq; 5283 newsav->created = sav->created; 5284 newsav->pid = sav->pid; 5285 newsav->sah = sav->sah; 5286 5287 error = key_setsaval(newsav, m, mhp); 5288 if (error) { 5289 key_delsav(newsav); 5290 goto error; 5291 } 5292 5293 error = key_handle_natt_info(newsav, mhp); 5294 if (error != 0) { 5295 key_delsav(newsav); 5296 goto error; 5297 } 5298 5299 error = key_init_xform(newsav); 5300 if (error != 0) { 5301 key_delsav(newsav); 5302 goto error; 5303 } 5304 5305 /* add to satree */ 5306 newsav->refcnt = 1; 5307 newsav->state = SADB_SASTATE_MATURE; 5308 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_MATURE], newsav, 5309 secasvar, chain); 5310 5311 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5312 KEY_FREESAV(&sav); 5313 KEY_FREESAV(&sav); 5314 5315 { 5316 struct mbuf *n; 5317 5318 /* set msg buf from mhp */ 5319 n = key_getmsgbuf_x1(m, mhp); 5320 if (n == NULL) { 5321 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5322 return key_senderror(so, m, ENOBUFS); 5323 } 5324 5325 m_freem(m); 5326 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5327 } 5328 error: 5329 KEY_FREESAV(&sav); 5330 return key_senderror(so, m, error); 5331 } 5332 5333 /* 5334 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5335 * only called by key_api_update(). 5336 * OUT: 5337 * NULL : not found 5338 * others : found, pointer to a SA. 5339 */ 5340 #ifdef IPSEC_DOSEQCHECK 5341 static struct secasvar * 5342 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5343 { 5344 struct secasvar *sav; 5345 u_int state; 5346 5347 state = SADB_SASTATE_LARVAL; 5348 5349 /* search SAD with sequence number ? */ 5350 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5351 5352 KEY_CHKSASTATE(state, sav->state); 5353 5354 if (sav->seq == seq) { 5355 SA_ADDREF(sav); 5356 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5357 "DP cause refcnt++:%d SA:%p\n", 5358 sav->refcnt, sav); 5359 return sav; 5360 } 5361 } 5362 5363 return NULL; 5364 } 5365 #endif 5366 5367 /* 5368 * SADB_ADD processing 5369 * add an entry to SA database, when received 5370 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5371 * key(AE), (identity(SD),) (sensitivity)> 5372 * from the ikmpd, 5373 * and send 5374 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5375 * (identity(SD),) (sensitivity)> 5376 * to the ikmpd. 5377 * 5378 * IGNORE identity and sensitivity messages. 5379 * 5380 * m will always be freed. 5381 */ 5382 static int 5383 key_api_add(struct socket *so, struct mbuf *m, 5384 const struct sadb_msghdr *mhp) 5385 { 5386 struct sadb_sa *sa0; 5387 const struct sockaddr *src, *dst; 5388 struct secasindex saidx; 5389 struct secashead *newsah; 5390 struct secasvar *newsav; 5391 u_int16_t proto; 5392 u_int8_t mode; 5393 u_int16_t reqid; 5394 int error; 5395 5396 /* map satype to proto */ 5397 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5398 if (proto == 0) { 5399 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5400 return key_senderror(so, m, EINVAL); 5401 } 5402 5403 if (mhp->ext[SADB_EXT_SA] == NULL || 5404 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5405 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5406 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5407 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5408 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5409 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5410 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5411 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5412 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5413 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5414 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5415 return key_senderror(so, m, EINVAL); 5416 } 5417 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5418 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5419 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5420 /* XXX need more */ 5421 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5422 return key_senderror(so, m, EINVAL); 5423 } 5424 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5425 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5426 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5427 } else { 5428 mode = IPSEC_MODE_ANY; 5429 reqid = 0; 5430 } 5431 5432 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5433 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5434 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5435 5436 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5437 if (error != 0) 5438 return key_senderror(so, m, EINVAL); 5439 5440 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5441 if (error != 0) 5442 return key_senderror(so, m, EINVAL); 5443 5444 /* get a SA header */ 5445 newsah = key_getsah(&saidx, CMP_REQID); 5446 if (newsah == NULL) { 5447 /* create a new SA header */ 5448 newsah = key_newsah(&saidx); 5449 if (newsah == NULL) { 5450 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5451 return key_senderror(so, m, ENOBUFS); 5452 } 5453 } 5454 5455 /* set spidx if there */ 5456 /* XXX rewrite */ 5457 error = key_setident(newsah, m, mhp); 5458 if (error) { 5459 return key_senderror(so, m, error); 5460 } 5461 5462 { 5463 struct secasvar *sav; 5464 5465 /* We can create new SA only if SPI is differenct. */ 5466 sav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 5467 if (sav != NULL) { 5468 KEY_FREESAV(&sav); 5469 IPSECLOG(LOG_DEBUG, "SA already exists.\n"); 5470 return key_senderror(so, m, EEXIST); 5471 } 5472 } 5473 5474 /* create new SA entry. */ 5475 newsav = KEY_NEWSAV(m, mhp, &error); 5476 if (newsav == NULL) { 5477 return key_senderror(so, m, error); 5478 } 5479 newsav->sah = newsah; 5480 5481 error = key_handle_natt_info(newsav, mhp); 5482 if (error != 0) { 5483 key_delsav(newsav); 5484 return key_senderror(so, m, EINVAL); 5485 } 5486 5487 error = key_init_xform(newsav); 5488 if (error != 0) { 5489 key_delsav(newsav); 5490 return key_senderror(so, m, error); 5491 } 5492 5493 /* add to satree */ 5494 newsav->refcnt = 1; 5495 newsav->state = SADB_SASTATE_MATURE; 5496 LIST_INSERT_TAIL(&newsah->savtree[SADB_SASTATE_MATURE], newsav, 5497 secasvar, chain); 5498 5499 /* 5500 * don't call key_freesav() here, as we would like to keep the SA 5501 * in the database on success. 5502 */ 5503 5504 { 5505 struct mbuf *n; 5506 5507 /* set msg buf from mhp */ 5508 n = key_getmsgbuf_x1(m, mhp); 5509 if (n == NULL) { 5510 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5511 return key_senderror(so, m, ENOBUFS); 5512 } 5513 5514 m_freem(m); 5515 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5516 } 5517 } 5518 5519 /* m is retained */ 5520 static int 5521 key_setident(struct secashead *sah, struct mbuf *m, 5522 const struct sadb_msghdr *mhp) 5523 { 5524 const struct sadb_ident *idsrc, *iddst; 5525 int idsrclen, iddstlen; 5526 5527 KASSERT(!cpu_softintr_p()); 5528 KASSERT(sah != NULL); 5529 KASSERT(m != NULL); 5530 KASSERT(mhp != NULL); 5531 KASSERT(mhp->msg != NULL); 5532 5533 /* 5534 * Can be called with an existing sah from key_api_update(). 5535 */ 5536 if (sah->idents != NULL) { 5537 kmem_free(sah->idents, sah->idents_len); 5538 sah->idents = NULL; 5539 sah->idents_len = 0; 5540 } 5541 if (sah->identd != NULL) { 5542 kmem_free(sah->identd, sah->identd_len); 5543 sah->identd = NULL; 5544 sah->identd_len = 0; 5545 } 5546 5547 /* don't make buffer if not there */ 5548 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5549 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5550 sah->idents = NULL; 5551 sah->identd = NULL; 5552 return 0; 5553 } 5554 5555 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5556 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5557 IPSECLOG(LOG_DEBUG, "invalid identity.\n"); 5558 return EINVAL; 5559 } 5560 5561 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5562 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5563 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5564 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5565 5566 /* validity check */ 5567 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5568 IPSECLOG(LOG_DEBUG, "ident type mismatch.\n"); 5569 return EINVAL; 5570 } 5571 5572 switch (idsrc->sadb_ident_type) { 5573 case SADB_IDENTTYPE_PREFIX: 5574 case SADB_IDENTTYPE_FQDN: 5575 case SADB_IDENTTYPE_USERFQDN: 5576 default: 5577 /* XXX do nothing */ 5578 sah->idents = NULL; 5579 sah->identd = NULL; 5580 return 0; 5581 } 5582 5583 /* make structure */ 5584 sah->idents = kmem_alloc(idsrclen, KM_SLEEP); 5585 sah->idents_len = idsrclen; 5586 sah->identd = kmem_alloc(iddstlen, KM_SLEEP); 5587 sah->identd_len = iddstlen; 5588 memcpy(sah->idents, idsrc, idsrclen); 5589 memcpy(sah->identd, iddst, iddstlen); 5590 5591 return 0; 5592 } 5593 5594 /* 5595 * m will not be freed on return. 5596 * it is caller's responsibility to free the result. 5597 */ 5598 static struct mbuf * 5599 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5600 { 5601 struct mbuf *n; 5602 5603 KASSERT(m != NULL); 5604 KASSERT(mhp != NULL); 5605 KASSERT(mhp->msg != NULL); 5606 5607 /* create new sadb_msg to reply. */ 5608 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5609 SADB_EXT_SA, SADB_X_EXT_SA2, 5610 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5611 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5612 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5613 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5614 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5615 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5616 if (!n) 5617 return NULL; 5618 5619 if (n->m_len < sizeof(struct sadb_msg)) { 5620 n = m_pullup(n, sizeof(struct sadb_msg)); 5621 if (n == NULL) 5622 return NULL; 5623 } 5624 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5625 mtod(n, struct sadb_msg *)->sadb_msg_len = 5626 PFKEY_UNIT64(n->m_pkthdr.len); 5627 5628 return n; 5629 } 5630 5631 static int key_delete_all (struct socket *, struct mbuf *, 5632 const struct sadb_msghdr *, u_int16_t); 5633 5634 /* 5635 * SADB_DELETE processing 5636 * receive 5637 * <base, SA(*), address(SD)> 5638 * from the ikmpd, and set SADB_SASTATE_DEAD, 5639 * and send, 5640 * <base, SA(*), address(SD)> 5641 * to the ikmpd. 5642 * 5643 * m will always be freed. 5644 */ 5645 static int 5646 key_api_delete(struct socket *so, struct mbuf *m, 5647 const struct sadb_msghdr *mhp) 5648 { 5649 struct sadb_sa *sa0; 5650 const struct sockaddr *src, *dst; 5651 struct secasindex saidx; 5652 struct secashead *sah; 5653 struct secasvar *sav = NULL; 5654 u_int16_t proto; 5655 int error; 5656 5657 /* map satype to proto */ 5658 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5659 if (proto == 0) { 5660 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5661 return key_senderror(so, m, EINVAL); 5662 } 5663 5664 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5665 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5666 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5667 return key_senderror(so, m, EINVAL); 5668 } 5669 5670 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5671 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5672 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5673 return key_senderror(so, m, EINVAL); 5674 } 5675 5676 if (mhp->ext[SADB_EXT_SA] == NULL) { 5677 /* 5678 * Caller wants us to delete all non-LARVAL SAs 5679 * that match the src/dst. This is used during 5680 * IKE INITIAL-CONTACT. 5681 */ 5682 IPSECLOG(LOG_DEBUG, "doing delete all.\n"); 5683 return key_delete_all(so, m, mhp, proto); 5684 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5685 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5686 return key_senderror(so, m, EINVAL); 5687 } 5688 5689 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5690 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5691 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5692 5693 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5694 if (error != 0) 5695 return key_senderror(so, m, EINVAL); 5696 5697 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5698 if (error != 0) 5699 return key_senderror(so, m, EINVAL); 5700 5701 /* get a SA header */ 5702 sah = key_getsah(&saidx, CMP_HEAD); 5703 if (sah != NULL) { 5704 /* get a SA with SPI. */ 5705 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5706 } 5707 5708 if (sav == NULL) { 5709 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5710 return key_senderror(so, m, ENOENT); 5711 } 5712 5713 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5714 KEY_FREESAV(&sav); 5715 KEY_FREESAV(&sav); 5716 5717 { 5718 struct mbuf *n; 5719 5720 /* create new sadb_msg to reply. */ 5721 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5722 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5723 if (!n) 5724 return key_senderror(so, m, ENOBUFS); 5725 5726 n = key_fill_replymsg(n, 0); 5727 if (n == NULL) 5728 return key_senderror(so, m, ENOBUFS); 5729 5730 m_freem(m); 5731 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5732 } 5733 } 5734 5735 /* 5736 * delete all SAs for src/dst. Called from key_api_delete(). 5737 */ 5738 static int 5739 key_delete_all(struct socket *so, struct mbuf *m, 5740 const struct sadb_msghdr *mhp, u_int16_t proto) 5741 { 5742 const struct sockaddr *src, *dst; 5743 struct secasindex saidx; 5744 struct secashead *sah; 5745 struct secasvar *sav, *nextsav; 5746 u_int state; 5747 int error; 5748 5749 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5750 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5751 5752 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5753 if (error != 0) 5754 return key_senderror(so, m, EINVAL); 5755 5756 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5757 if (error != 0) 5758 return key_senderror(so, m, EINVAL); 5759 5760 sah = key_getsah(&saidx, CMP_HEAD); 5761 if (sah != NULL) { 5762 /* Delete all non-LARVAL SAs. */ 5763 SASTATE_ALIVE_FOREACH(state) { 5764 if (state == SADB_SASTATE_LARVAL) 5765 continue; 5766 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 5767 nextsav) { 5768 /* sanity check */ 5769 if (sav->state != state) { 5770 IPSECLOG(LOG_DEBUG, 5771 "invalid sav->state " 5772 "(queue: %d SA: %d)\n", 5773 state, sav->state); 5774 continue; 5775 } 5776 5777 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5778 KEY_FREESAV(&sav); 5779 } 5780 } 5781 } 5782 { 5783 struct mbuf *n; 5784 5785 /* create new sadb_msg to reply. */ 5786 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5787 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5788 if (!n) 5789 return key_senderror(so, m, ENOBUFS); 5790 5791 n = key_fill_replymsg(n, 0); 5792 if (n == NULL) 5793 return key_senderror(so, m, ENOBUFS); 5794 5795 m_freem(m); 5796 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5797 } 5798 } 5799 5800 /* 5801 * SADB_GET processing 5802 * receive 5803 * <base, SA(*), address(SD)> 5804 * from the ikmpd, and get a SP and a SA to respond, 5805 * and send, 5806 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5807 * (identity(SD),) (sensitivity)> 5808 * to the ikmpd. 5809 * 5810 * m will always be freed. 5811 */ 5812 static int 5813 key_api_get(struct socket *so, struct mbuf *m, 5814 const struct sadb_msghdr *mhp) 5815 { 5816 struct sadb_sa *sa0; 5817 const struct sockaddr *src, *dst; 5818 struct secasindex saidx; 5819 struct secashead *sah; 5820 struct secasvar *sav = NULL; 5821 u_int16_t proto; 5822 int error; 5823 5824 /* map satype to proto */ 5825 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5826 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5827 return key_senderror(so, m, EINVAL); 5828 } 5829 5830 if (mhp->ext[SADB_EXT_SA] == NULL || 5831 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5832 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5833 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5834 return key_senderror(so, m, EINVAL); 5835 } 5836 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5837 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5838 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5839 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5840 return key_senderror(so, m, EINVAL); 5841 } 5842 5843 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5844 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5845 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5846 5847 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5848 if (error != 0) 5849 return key_senderror(so, m, EINVAL); 5850 5851 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5852 if (error != 0) 5853 return key_senderror(so, m, EINVAL); 5854 5855 /* get a SA header */ 5856 sah = key_getsah(&saidx, CMP_HEAD); 5857 if (sah != NULL) { 5858 /* get a SA with SPI. */ 5859 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5860 } 5861 if (sav == NULL) { 5862 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5863 return key_senderror(so, m, ENOENT); 5864 } 5865 5866 { 5867 struct mbuf *n; 5868 u_int8_t satype; 5869 5870 /* map proto to satype */ 5871 satype = key_proto2satype(sah->saidx.proto); 5872 if (satype == 0) { 5873 KEY_FREESAV(&sav); 5874 IPSECLOG(LOG_DEBUG, "there was invalid proto in SAD.\n"); 5875 return key_senderror(so, m, EINVAL); 5876 } 5877 5878 /* create new sadb_msg to reply. */ 5879 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5880 mhp->msg->sadb_msg_pid); 5881 KEY_FREESAV(&sav); 5882 if (!n) 5883 return key_senderror(so, m, ENOBUFS); 5884 5885 m_freem(m); 5886 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5887 } 5888 } 5889 5890 /* XXX make it sysctl-configurable? */ 5891 static void 5892 key_getcomb_setlifetime(struct sadb_comb *comb) 5893 { 5894 5895 comb->sadb_comb_soft_allocations = 1; 5896 comb->sadb_comb_hard_allocations = 1; 5897 comb->sadb_comb_soft_bytes = 0; 5898 comb->sadb_comb_hard_bytes = 0; 5899 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5900 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5901 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5902 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5903 } 5904 5905 /* 5906 * XXX reorder combinations by preference 5907 * XXX no idea if the user wants ESP authentication or not 5908 */ 5909 static struct mbuf * 5910 key_getcomb_esp(void) 5911 { 5912 struct sadb_comb *comb; 5913 const struct enc_xform *algo; 5914 struct mbuf *result = NULL, *m, *n; 5915 int encmin; 5916 int i, off, o; 5917 int totlen; 5918 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5919 5920 m = NULL; 5921 for (i = 1; i <= SADB_EALG_MAX; i++) { 5922 algo = esp_algorithm_lookup(i); 5923 if (algo == NULL) 5924 continue; 5925 5926 /* discard algorithms with key size smaller than system min */ 5927 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5928 continue; 5929 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5930 encmin = ipsec_esp_keymin; 5931 else 5932 encmin = _BITS(algo->minkey); 5933 5934 if (ipsec_esp_auth) 5935 m = key_getcomb_ah(); 5936 else { 5937 KASSERTMSG(l <= MLEN, 5938 "l=%u > MLEN=%lu", l, (u_long) MLEN); 5939 MGET(m, M_DONTWAIT, MT_DATA); 5940 if (m) { 5941 M_ALIGN(m, l); 5942 m->m_len = l; 5943 m->m_next = NULL; 5944 memset(mtod(m, void *), 0, m->m_len); 5945 } 5946 } 5947 if (!m) 5948 goto fail; 5949 5950 totlen = 0; 5951 for (n = m; n; n = n->m_next) 5952 totlen += n->m_len; 5953 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 5954 5955 for (off = 0; off < totlen; off += l) { 5956 n = m_pulldown(m, off, l, &o); 5957 if (!n) { 5958 /* m is already freed */ 5959 goto fail; 5960 } 5961 comb = (struct sadb_comb *)(mtod(n, char *) + o); 5962 memset(comb, 0, sizeof(*comb)); 5963 key_getcomb_setlifetime(comb); 5964 comb->sadb_comb_encrypt = i; 5965 comb->sadb_comb_encrypt_minbits = encmin; 5966 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5967 } 5968 5969 if (!result) 5970 result = m; 5971 else 5972 m_cat(result, m); 5973 } 5974 5975 return result; 5976 5977 fail: 5978 if (result) 5979 m_freem(result); 5980 return NULL; 5981 } 5982 5983 static void 5984 key_getsizes_ah(const struct auth_hash *ah, int alg, 5985 u_int16_t* ksmin, u_int16_t* ksmax) 5986 { 5987 *ksmin = *ksmax = ah->keysize; 5988 if (ah->keysize == 0) { 5989 /* 5990 * Transform takes arbitrary key size but algorithm 5991 * key size is restricted. Enforce this here. 5992 */ 5993 switch (alg) { 5994 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 5995 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 5996 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 5997 default: 5998 IPSECLOG(LOG_DEBUG, "unknown AH algorithm %u\n", alg); 5999 break; 6000 } 6001 } 6002 } 6003 6004 /* 6005 * XXX reorder combinations by preference 6006 */ 6007 static struct mbuf * 6008 key_getcomb_ah(void) 6009 { 6010 struct sadb_comb *comb; 6011 const struct auth_hash *algo; 6012 struct mbuf *m; 6013 u_int16_t minkeysize, maxkeysize; 6014 int i; 6015 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6016 6017 m = NULL; 6018 for (i = 1; i <= SADB_AALG_MAX; i++) { 6019 #if 1 6020 /* we prefer HMAC algorithms, not old algorithms */ 6021 if (i != SADB_AALG_SHA1HMAC && 6022 i != SADB_AALG_MD5HMAC && 6023 i != SADB_X_AALG_SHA2_256 && 6024 i != SADB_X_AALG_SHA2_384 && 6025 i != SADB_X_AALG_SHA2_512) 6026 continue; 6027 #endif 6028 algo = ah_algorithm_lookup(i); 6029 if (!algo) 6030 continue; 6031 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6032 /* discard algorithms with key size smaller than system min */ 6033 if (_BITS(minkeysize) < ipsec_ah_keymin) 6034 continue; 6035 6036 if (!m) { 6037 KASSERTMSG(l <= MLEN, 6038 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6039 MGET(m, M_DONTWAIT, MT_DATA); 6040 if (m) { 6041 M_ALIGN(m, l); 6042 m->m_len = l; 6043 m->m_next = NULL; 6044 } 6045 } else 6046 M_PREPEND(m, l, M_DONTWAIT); 6047 if (!m) 6048 return NULL; 6049 6050 if (m->m_len < sizeof(struct sadb_comb)) { 6051 m = m_pullup(m, sizeof(struct sadb_comb)); 6052 if (m == NULL) 6053 return NULL; 6054 } 6055 6056 comb = mtod(m, struct sadb_comb *); 6057 memset(comb, 0, sizeof(*comb)); 6058 key_getcomb_setlifetime(comb); 6059 comb->sadb_comb_auth = i; 6060 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6061 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6062 } 6063 6064 return m; 6065 } 6066 6067 /* 6068 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6069 * XXX reorder combinations by preference 6070 */ 6071 static struct mbuf * 6072 key_getcomb_ipcomp(void) 6073 { 6074 struct sadb_comb *comb; 6075 const struct comp_algo *algo; 6076 struct mbuf *m; 6077 int i; 6078 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6079 6080 m = NULL; 6081 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6082 algo = ipcomp_algorithm_lookup(i); 6083 if (!algo) 6084 continue; 6085 6086 if (!m) { 6087 KASSERTMSG(l <= MLEN, 6088 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6089 MGET(m, M_DONTWAIT, MT_DATA); 6090 if (m) { 6091 M_ALIGN(m, l); 6092 m->m_len = l; 6093 m->m_next = NULL; 6094 } 6095 } else 6096 M_PREPEND(m, l, M_DONTWAIT); 6097 if (!m) 6098 return NULL; 6099 6100 if (m->m_len < sizeof(struct sadb_comb)) { 6101 m = m_pullup(m, sizeof(struct sadb_comb)); 6102 if (m == NULL) 6103 return NULL; 6104 } 6105 6106 comb = mtod(m, struct sadb_comb *); 6107 memset(comb, 0, sizeof(*comb)); 6108 key_getcomb_setlifetime(comb); 6109 comb->sadb_comb_encrypt = i; 6110 /* what should we set into sadb_comb_*_{min,max}bits? */ 6111 } 6112 6113 return m; 6114 } 6115 6116 /* 6117 * XXX no way to pass mode (transport/tunnel) to userland 6118 * XXX replay checking? 6119 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6120 */ 6121 static struct mbuf * 6122 key_getprop(const struct secasindex *saidx) 6123 { 6124 struct sadb_prop *prop; 6125 struct mbuf *m, *n; 6126 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6127 int totlen; 6128 6129 switch (saidx->proto) { 6130 case IPPROTO_ESP: 6131 m = key_getcomb_esp(); 6132 break; 6133 case IPPROTO_AH: 6134 m = key_getcomb_ah(); 6135 break; 6136 case IPPROTO_IPCOMP: 6137 m = key_getcomb_ipcomp(); 6138 break; 6139 default: 6140 return NULL; 6141 } 6142 6143 if (!m) 6144 return NULL; 6145 M_PREPEND(m, l, M_DONTWAIT); 6146 if (!m) 6147 return NULL; 6148 6149 totlen = 0; 6150 for (n = m; n; n = n->m_next) 6151 totlen += n->m_len; 6152 6153 prop = mtod(m, struct sadb_prop *); 6154 memset(prop, 0, sizeof(*prop)); 6155 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6156 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6157 prop->sadb_prop_replay = 32; /* XXX */ 6158 6159 return m; 6160 } 6161 6162 /* 6163 * SADB_ACQUIRE processing called by key_checkrequest() and key_api_acquire(). 6164 * send 6165 * <base, SA, address(SD), (address(P)), x_policy, 6166 * (identity(SD),) (sensitivity,) proposal> 6167 * to KMD, and expect to receive 6168 * <base> with SADB_ACQUIRE if error occurred, 6169 * or 6170 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6171 * from KMD by PF_KEY. 6172 * 6173 * XXX x_policy is outside of RFC2367 (KAME extension). 6174 * XXX sensitivity is not supported. 6175 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6176 * see comment for key_getcomb_ipcomp(). 6177 * 6178 * OUT: 6179 * 0 : succeed 6180 * others: error number 6181 */ 6182 static int 6183 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6184 { 6185 struct mbuf *result = NULL, *m; 6186 #ifndef IPSEC_NONBLOCK_ACQUIRE 6187 struct secacq *newacq; 6188 #endif 6189 u_int8_t satype; 6190 int error = -1; 6191 u_int32_t seq; 6192 6193 /* sanity check */ 6194 KASSERT(saidx != NULL); 6195 satype = key_proto2satype(saidx->proto); 6196 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6197 6198 #ifndef IPSEC_NONBLOCK_ACQUIRE 6199 /* 6200 * We never do anything about acquirng SA. There is anather 6201 * solution that kernel blocks to send SADB_ACQUIRE message until 6202 * getting something message from IKEd. In later case, to be 6203 * managed with ACQUIRING list. 6204 */ 6205 /* Get an entry to check whether sending message or not. */ 6206 mutex_enter(&key_mtx); 6207 newacq = key_getacq(saidx); 6208 if (newacq != NULL) { 6209 if (key_blockacq_count < newacq->count) { 6210 /* reset counter and do send message. */ 6211 newacq->count = 0; 6212 } else { 6213 /* increment counter and do nothing. */ 6214 newacq->count++; 6215 mutex_exit(&key_mtx); 6216 return 0; 6217 } 6218 } else { 6219 /* make new entry for blocking to send SADB_ACQUIRE. */ 6220 newacq = key_newacq(saidx); 6221 if (newacq == NULL) 6222 return ENOBUFS; 6223 6224 /* add to acqtree */ 6225 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6226 } 6227 6228 seq = newacq->seq; 6229 mutex_exit(&key_mtx); 6230 #else 6231 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6232 #endif 6233 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6234 if (!m) { 6235 error = ENOBUFS; 6236 goto fail; 6237 } 6238 result = m; 6239 6240 /* set sadb_address for saidx's. */ 6241 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &saidx->src.sa, FULLMASK, 6242 IPSEC_ULPROTO_ANY); 6243 if (!m) { 6244 error = ENOBUFS; 6245 goto fail; 6246 } 6247 m_cat(result, m); 6248 6249 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &saidx->dst.sa, FULLMASK, 6250 IPSEC_ULPROTO_ANY); 6251 if (!m) { 6252 error = ENOBUFS; 6253 goto fail; 6254 } 6255 m_cat(result, m); 6256 6257 /* XXX proxy address (optional) */ 6258 6259 /* set sadb_x_policy */ 6260 if (sp) { 6261 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6262 if (!m) { 6263 error = ENOBUFS; 6264 goto fail; 6265 } 6266 m_cat(result, m); 6267 } 6268 6269 /* XXX identity (optional) */ 6270 #if 0 6271 if (idexttype && fqdn) { 6272 /* create identity extension (FQDN) */ 6273 struct sadb_ident *id; 6274 int fqdnlen; 6275 6276 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6277 id = (struct sadb_ident *)p; 6278 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6279 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6280 id->sadb_ident_exttype = idexttype; 6281 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6282 memcpy(id + 1, fqdn, fqdnlen); 6283 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6284 } 6285 6286 if (idexttype) { 6287 /* create identity extension (USERFQDN) */ 6288 struct sadb_ident *id; 6289 int userfqdnlen; 6290 6291 if (userfqdn) { 6292 /* +1 for terminating-NUL */ 6293 userfqdnlen = strlen(userfqdn) + 1; 6294 } else 6295 userfqdnlen = 0; 6296 id = (struct sadb_ident *)p; 6297 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6298 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6299 id->sadb_ident_exttype = idexttype; 6300 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6301 /* XXX is it correct? */ 6302 if (curlwp) 6303 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6304 if (userfqdn && userfqdnlen) 6305 memcpy(id + 1, userfqdn, userfqdnlen); 6306 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6307 } 6308 #endif 6309 6310 /* XXX sensitivity (optional) */ 6311 6312 /* create proposal/combination extension */ 6313 m = key_getprop(saidx); 6314 #if 0 6315 /* 6316 * spec conformant: always attach proposal/combination extension, 6317 * the problem is that we have no way to attach it for ipcomp, 6318 * due to the way sadb_comb is declared in RFC2367. 6319 */ 6320 if (!m) { 6321 error = ENOBUFS; 6322 goto fail; 6323 } 6324 m_cat(result, m); 6325 #else 6326 /* 6327 * outside of spec; make proposal/combination extension optional. 6328 */ 6329 if (m) 6330 m_cat(result, m); 6331 #endif 6332 6333 if ((result->m_flags & M_PKTHDR) == 0) { 6334 error = EINVAL; 6335 goto fail; 6336 } 6337 6338 if (result->m_len < sizeof(struct sadb_msg)) { 6339 result = m_pullup(result, sizeof(struct sadb_msg)); 6340 if (result == NULL) { 6341 error = ENOBUFS; 6342 goto fail; 6343 } 6344 } 6345 6346 result->m_pkthdr.len = 0; 6347 for (m = result; m; m = m->m_next) 6348 result->m_pkthdr.len += m->m_len; 6349 6350 mtod(result, struct sadb_msg *)->sadb_msg_len = 6351 PFKEY_UNIT64(result->m_pkthdr.len); 6352 6353 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6354 6355 fail: 6356 if (result) 6357 m_freem(result); 6358 return error; 6359 } 6360 6361 #ifndef IPSEC_NONBLOCK_ACQUIRE 6362 static struct secacq * 6363 key_newacq(const struct secasindex *saidx) 6364 { 6365 struct secacq *newacq; 6366 6367 /* get new entry */ 6368 newacq = kmem_intr_zalloc(sizeof(struct secacq), KM_NOSLEEP); 6369 if (newacq == NULL) { 6370 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6371 return NULL; 6372 } 6373 6374 /* copy secindex */ 6375 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6376 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6377 newacq->created = time_uptime; 6378 newacq->count = 0; 6379 6380 return newacq; 6381 } 6382 6383 static struct secacq * 6384 key_getacq(const struct secasindex *saidx) 6385 { 6386 struct secacq *acq; 6387 6388 KASSERT(mutex_owned(&key_mtx)); 6389 6390 LIST_FOREACH(acq, &acqtree, chain) { 6391 if (key_saidx_match(saidx, &acq->saidx, CMP_EXACTLY)) 6392 return acq; 6393 } 6394 6395 return NULL; 6396 } 6397 6398 static struct secacq * 6399 key_getacqbyseq(u_int32_t seq) 6400 { 6401 struct secacq *acq; 6402 6403 KASSERT(mutex_owned(&key_mtx)); 6404 6405 LIST_FOREACH(acq, &acqtree, chain) { 6406 if (acq->seq == seq) 6407 return acq; 6408 } 6409 6410 return NULL; 6411 } 6412 #endif 6413 6414 #ifdef notyet 6415 static struct secspacq * 6416 key_newspacq(const struct secpolicyindex *spidx) 6417 { 6418 struct secspacq *acq; 6419 6420 /* get new entry */ 6421 acq = kmem_intr_zalloc(sizeof(struct secspacq), KM_NOSLEEP); 6422 if (acq == NULL) { 6423 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6424 return NULL; 6425 } 6426 6427 /* copy secindex */ 6428 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6429 acq->created = time_uptime; 6430 acq->count = 0; 6431 6432 return acq; 6433 } 6434 6435 static struct secspacq * 6436 key_getspacq(const struct secpolicyindex *spidx) 6437 { 6438 struct secspacq *acq; 6439 6440 LIST_FOREACH(acq, &spacqtree, chain) { 6441 if (key_spidx_match_exactly(spidx, &acq->spidx)) 6442 return acq; 6443 } 6444 6445 return NULL; 6446 } 6447 #endif /* notyet */ 6448 6449 /* 6450 * SADB_ACQUIRE processing, 6451 * in first situation, is receiving 6452 * <base> 6453 * from the ikmpd, and clear sequence of its secasvar entry. 6454 * 6455 * In second situation, is receiving 6456 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6457 * from a user land process, and return 6458 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6459 * to the socket. 6460 * 6461 * m will always be freed. 6462 */ 6463 static int 6464 key_api_acquire(struct socket *so, struct mbuf *m, 6465 const struct sadb_msghdr *mhp) 6466 { 6467 const struct sockaddr *src, *dst; 6468 struct secasindex saidx; 6469 struct secashead *sah; 6470 u_int16_t proto; 6471 int error; 6472 6473 /* 6474 * Error message from KMd. 6475 * We assume that if error was occurred in IKEd, the length of PFKEY 6476 * message is equal to the size of sadb_msg structure. 6477 * We do not raise error even if error occurred in this function. 6478 */ 6479 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6480 #ifndef IPSEC_NONBLOCK_ACQUIRE 6481 struct secacq *acq; 6482 6483 /* check sequence number */ 6484 if (mhp->msg->sadb_msg_seq == 0) { 6485 IPSECLOG(LOG_DEBUG, "must specify sequence number.\n"); 6486 m_freem(m); 6487 return 0; 6488 } 6489 6490 mutex_enter(&key_mtx); 6491 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 6492 if (acq == NULL) { 6493 mutex_exit(&key_mtx); 6494 /* 6495 * the specified larval SA is already gone, or we got 6496 * a bogus sequence number. we can silently ignore it. 6497 */ 6498 m_freem(m); 6499 return 0; 6500 } 6501 6502 /* reset acq counter in order to deletion by timehander. */ 6503 acq->created = time_uptime; 6504 acq->count = 0; 6505 mutex_exit(&key_mtx); 6506 #endif 6507 m_freem(m); 6508 return 0; 6509 } 6510 6511 /* 6512 * This message is from user land. 6513 */ 6514 6515 /* map satype to proto */ 6516 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6517 if (proto == 0) { 6518 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6519 return key_senderror(so, m, EINVAL); 6520 } 6521 6522 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6523 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6524 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6525 /* error */ 6526 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6527 return key_senderror(so, m, EINVAL); 6528 } 6529 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6530 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6531 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6532 /* error */ 6533 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6534 return key_senderror(so, m, EINVAL); 6535 } 6536 6537 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6538 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6539 6540 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6541 if (error != 0) 6542 return key_senderror(so, m, EINVAL); 6543 6544 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6545 if (error != 0) 6546 return key_senderror(so, m, EINVAL); 6547 6548 /* get a SA index */ 6549 sah = key_getsah(&saidx, CMP_MODE_REQID); 6550 if (sah != NULL) { 6551 IPSECLOG(LOG_DEBUG, "a SA exists already.\n"); 6552 return key_senderror(so, m, EEXIST); 6553 } 6554 6555 error = key_acquire(&saidx, NULL); 6556 if (error != 0) { 6557 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 6558 error); 6559 return key_senderror(so, m, error); 6560 } 6561 6562 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6563 } 6564 6565 /* 6566 * SADB_REGISTER processing. 6567 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6568 * receive 6569 * <base> 6570 * from the ikmpd, and register a socket to send PF_KEY messages, 6571 * and send 6572 * <base, supported> 6573 * to KMD by PF_KEY. 6574 * If socket is detached, must free from regnode. 6575 * 6576 * m will always be freed. 6577 */ 6578 static int 6579 key_api_register(struct socket *so, struct mbuf *m, 6580 const struct sadb_msghdr *mhp) 6581 { 6582 struct secreg *reg, *newreg = 0; 6583 6584 /* check for invalid register message */ 6585 if (mhp->msg->sadb_msg_satype >= __arraycount(regtree)) 6586 return key_senderror(so, m, EINVAL); 6587 6588 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6589 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6590 goto setmsg; 6591 6592 /* Allocate regnode in advance, out of mutex */ 6593 newreg = kmem_zalloc(sizeof(*newreg), KM_SLEEP); 6594 6595 /* check whether existing or not */ 6596 mutex_enter(&key_mtx); 6597 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6598 if (reg->so == so) { 6599 IPSECLOG(LOG_DEBUG, "socket exists already.\n"); 6600 mutex_exit(&key_mtx); 6601 kmem_free(newreg, sizeof(*newreg)); 6602 return key_senderror(so, m, EEXIST); 6603 } 6604 } 6605 6606 newreg->so = so; 6607 ((struct keycb *)sotorawcb(so))->kp_registered++; 6608 6609 /* add regnode to regtree. */ 6610 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6611 mutex_exit(&key_mtx); 6612 6613 setmsg: 6614 { 6615 struct mbuf *n; 6616 struct sadb_supported *sup; 6617 u_int len, alen, elen; 6618 int off; 6619 int i; 6620 struct sadb_alg *alg; 6621 6622 /* create new sadb_msg to reply. */ 6623 alen = 0; 6624 for (i = 1; i <= SADB_AALG_MAX; i++) { 6625 if (ah_algorithm_lookup(i)) 6626 alen += sizeof(struct sadb_alg); 6627 } 6628 if (alen) 6629 alen += sizeof(struct sadb_supported); 6630 elen = 0; 6631 for (i = 1; i <= SADB_EALG_MAX; i++) { 6632 if (esp_algorithm_lookup(i)) 6633 elen += sizeof(struct sadb_alg); 6634 } 6635 if (elen) 6636 elen += sizeof(struct sadb_supported); 6637 6638 len = sizeof(struct sadb_msg) + alen + elen; 6639 6640 if (len > MCLBYTES) 6641 return key_senderror(so, m, ENOBUFS); 6642 6643 MGETHDR(n, M_DONTWAIT, MT_DATA); 6644 if (len > MHLEN) { 6645 MCLGET(n, M_DONTWAIT); 6646 if ((n->m_flags & M_EXT) == 0) { 6647 m_freem(n); 6648 n = NULL; 6649 } 6650 } 6651 if (!n) 6652 return key_senderror(so, m, ENOBUFS); 6653 6654 n->m_pkthdr.len = n->m_len = len; 6655 n->m_next = NULL; 6656 off = 0; 6657 6658 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6659 n = key_fill_replymsg(n, 0); 6660 if (n == NULL) 6661 return key_senderror(so, m, ENOBUFS); 6662 6663 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6664 6665 /* for authentication algorithm */ 6666 if (alen) { 6667 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6668 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6669 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6670 off += PFKEY_ALIGN8(sizeof(*sup)); 6671 6672 for (i = 1; i <= SADB_AALG_MAX; i++) { 6673 const struct auth_hash *aalgo; 6674 u_int16_t minkeysize, maxkeysize; 6675 6676 aalgo = ah_algorithm_lookup(i); 6677 if (!aalgo) 6678 continue; 6679 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6680 alg->sadb_alg_id = i; 6681 alg->sadb_alg_ivlen = 0; 6682 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6683 alg->sadb_alg_minbits = _BITS(minkeysize); 6684 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6685 off += PFKEY_ALIGN8(sizeof(*alg)); 6686 } 6687 } 6688 6689 /* for encryption algorithm */ 6690 if (elen) { 6691 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6692 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6693 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6694 off += PFKEY_ALIGN8(sizeof(*sup)); 6695 6696 for (i = 1; i <= SADB_EALG_MAX; i++) { 6697 const struct enc_xform *ealgo; 6698 6699 ealgo = esp_algorithm_lookup(i); 6700 if (!ealgo) 6701 continue; 6702 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6703 alg->sadb_alg_id = i; 6704 alg->sadb_alg_ivlen = ealgo->blocksize; 6705 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6706 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6707 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6708 } 6709 } 6710 6711 KASSERTMSG(off == len, "length inconsistency"); 6712 6713 m_freem(m); 6714 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6715 } 6716 } 6717 6718 /* 6719 * free secreg entry registered. 6720 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6721 */ 6722 void 6723 key_freereg(struct socket *so) 6724 { 6725 struct secreg *reg; 6726 int i; 6727 6728 KASSERT(!cpu_softintr_p()); 6729 KASSERT(so != NULL); 6730 6731 /* 6732 * check whether existing or not. 6733 * check all type of SA, because there is a potential that 6734 * one socket is registered to multiple type of SA. 6735 */ 6736 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6737 mutex_enter(&key_mtx); 6738 LIST_FOREACH(reg, ®tree[i], chain) { 6739 if (reg->so == so) { 6740 LIST_REMOVE(reg, chain); 6741 break; 6742 } 6743 } 6744 mutex_exit(&key_mtx); 6745 if (reg != NULL) 6746 kmem_free(reg, sizeof(*reg)); 6747 } 6748 6749 return; 6750 } 6751 6752 /* 6753 * SADB_EXPIRE processing 6754 * send 6755 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6756 * to KMD by PF_KEY. 6757 * NOTE: We send only soft lifetime extension. 6758 * 6759 * OUT: 0 : succeed 6760 * others : error number 6761 */ 6762 static int 6763 key_expire(struct secasvar *sav) 6764 { 6765 int s; 6766 int satype; 6767 struct mbuf *result = NULL, *m; 6768 int len; 6769 int error = -1; 6770 struct sadb_lifetime *lt; 6771 6772 /* XXX: Why do we lock ? */ 6773 s = splsoftnet(); /*called from softclock()*/ 6774 6775 KASSERT(sav != NULL); 6776 6777 satype = key_proto2satype(sav->sah->saidx.proto); 6778 KASSERTMSG(satype != 0, "invalid proto is passed"); 6779 6780 /* set msg header */ 6781 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6782 if (!m) { 6783 error = ENOBUFS; 6784 goto fail; 6785 } 6786 result = m; 6787 6788 /* create SA extension */ 6789 m = key_setsadbsa(sav); 6790 if (!m) { 6791 error = ENOBUFS; 6792 goto fail; 6793 } 6794 m_cat(result, m); 6795 6796 /* create SA extension */ 6797 m = key_setsadbxsa2(sav->sah->saidx.mode, 6798 sav->replay ? sav->replay->count : 0, sav->sah->saidx.reqid); 6799 if (!m) { 6800 error = ENOBUFS; 6801 goto fail; 6802 } 6803 m_cat(result, m); 6804 6805 /* create lifetime extension (current and soft) */ 6806 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6807 m = key_alloc_mbuf(len); 6808 if (!m || m->m_next) { /*XXX*/ 6809 if (m) 6810 m_freem(m); 6811 error = ENOBUFS; 6812 goto fail; 6813 } 6814 memset(mtod(m, void *), 0, len); 6815 lt = mtod(m, struct sadb_lifetime *); 6816 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6817 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6818 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6819 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6820 lt->sadb_lifetime_addtime = 6821 time_mono_to_wall(sav->lft_c->sadb_lifetime_addtime); 6822 lt->sadb_lifetime_usetime = 6823 time_mono_to_wall(sav->lft_c->sadb_lifetime_usetime); 6824 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6825 memcpy(lt, sav->lft_s, sizeof(*lt)); 6826 m_cat(result, m); 6827 6828 /* set sadb_address for source */ 6829 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 6830 FULLMASK, IPSEC_ULPROTO_ANY); 6831 if (!m) { 6832 error = ENOBUFS; 6833 goto fail; 6834 } 6835 m_cat(result, m); 6836 6837 /* set sadb_address for destination */ 6838 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.dst.sa, 6839 FULLMASK, IPSEC_ULPROTO_ANY); 6840 if (!m) { 6841 error = ENOBUFS; 6842 goto fail; 6843 } 6844 m_cat(result, m); 6845 6846 if ((result->m_flags & M_PKTHDR) == 0) { 6847 error = EINVAL; 6848 goto fail; 6849 } 6850 6851 if (result->m_len < sizeof(struct sadb_msg)) { 6852 result = m_pullup(result, sizeof(struct sadb_msg)); 6853 if (result == NULL) { 6854 error = ENOBUFS; 6855 goto fail; 6856 } 6857 } 6858 6859 result->m_pkthdr.len = 0; 6860 for (m = result; m; m = m->m_next) 6861 result->m_pkthdr.len += m->m_len; 6862 6863 mtod(result, struct sadb_msg *)->sadb_msg_len = 6864 PFKEY_UNIT64(result->m_pkthdr.len); 6865 6866 splx(s); 6867 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6868 6869 fail: 6870 if (result) 6871 m_freem(result); 6872 splx(s); 6873 return error; 6874 } 6875 6876 /* 6877 * SADB_FLUSH processing 6878 * receive 6879 * <base> 6880 * from the ikmpd, and free all entries in secastree. 6881 * and send, 6882 * <base> 6883 * to the ikmpd. 6884 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6885 * 6886 * m will always be freed. 6887 */ 6888 static int 6889 key_api_flush(struct socket *so, struct mbuf *m, 6890 const struct sadb_msghdr *mhp) 6891 { 6892 struct sadb_msg *newmsg; 6893 struct secashead *sah; 6894 struct secasvar *sav, *nextsav; 6895 u_int16_t proto; 6896 u_int8_t state; 6897 6898 /* map satype to proto */ 6899 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6900 if (proto == 0) { 6901 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6902 return key_senderror(so, m, EINVAL); 6903 } 6904 6905 /* no SATYPE specified, i.e. flushing all SA. */ 6906 LIST_FOREACH(sah, &sahtree, chain) { 6907 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && 6908 proto != sah->saidx.proto) 6909 continue; 6910 6911 SASTATE_ALIVE_FOREACH(state) { 6912 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 6913 nextsav) { 6914 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6915 KEY_FREESAV(&sav); 6916 } 6917 } 6918 6919 sah->state = SADB_SASTATE_DEAD; 6920 } 6921 6922 if (m->m_len < sizeof(struct sadb_msg) || 6923 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6924 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6925 return key_senderror(so, m, ENOBUFS); 6926 } 6927 6928 if (m->m_next) 6929 m_freem(m->m_next); 6930 m->m_next = NULL; 6931 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6932 newmsg = mtod(m, struct sadb_msg *); 6933 newmsg->sadb_msg_errno = 0; 6934 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6935 6936 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6937 } 6938 6939 6940 static struct mbuf * 6941 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6942 { 6943 struct secashead *sah; 6944 struct secasvar *sav; 6945 u_int16_t proto; 6946 u_int8_t satype; 6947 u_int8_t state; 6948 int cnt; 6949 struct mbuf *m, *n, *prev; 6950 6951 *lenp = 0; 6952 6953 /* map satype to proto */ 6954 proto = key_satype2proto(req_satype); 6955 if (proto == 0) { 6956 *errorp = EINVAL; 6957 return (NULL); 6958 } 6959 6960 /* count sav entries to be sent to userland. */ 6961 cnt = 0; 6962 LIST_FOREACH(sah, &sahtree, chain) { 6963 if (req_satype != SADB_SATYPE_UNSPEC && 6964 proto != sah->saidx.proto) 6965 continue; 6966 6967 SASTATE_ANY_FOREACH(state) { 6968 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6969 cnt++; 6970 } 6971 } 6972 } 6973 6974 if (cnt == 0) { 6975 *errorp = ENOENT; 6976 return (NULL); 6977 } 6978 6979 /* send this to the userland, one at a time. */ 6980 m = NULL; 6981 prev = m; 6982 LIST_FOREACH(sah, &sahtree, chain) { 6983 if (req_satype != SADB_SATYPE_UNSPEC && 6984 proto != sah->saidx.proto) 6985 continue; 6986 6987 /* map proto to satype */ 6988 satype = key_proto2satype(sah->saidx.proto); 6989 if (satype == 0) { 6990 m_freem(m); 6991 *errorp = EINVAL; 6992 return (NULL); 6993 } 6994 6995 SASTATE_ANY_FOREACH(state) { 6996 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6997 n = key_setdumpsa(sav, SADB_DUMP, satype, 6998 --cnt, pid); 6999 if (!n) { 7000 m_freem(m); 7001 *errorp = ENOBUFS; 7002 return (NULL); 7003 } 7004 7005 if (!m) 7006 m = n; 7007 else 7008 prev->m_nextpkt = n; 7009 prev = n; 7010 } 7011 } 7012 } 7013 7014 if (!m) { 7015 *errorp = EINVAL; 7016 return (NULL); 7017 } 7018 7019 if ((m->m_flags & M_PKTHDR) != 0) { 7020 m->m_pkthdr.len = 0; 7021 for (n = m; n; n = n->m_next) 7022 m->m_pkthdr.len += n->m_len; 7023 } 7024 7025 *errorp = 0; 7026 return (m); 7027 } 7028 7029 /* 7030 * SADB_DUMP processing 7031 * dump all entries including status of DEAD in SAD. 7032 * receive 7033 * <base> 7034 * from the ikmpd, and dump all secasvar leaves 7035 * and send, 7036 * <base> ..... 7037 * to the ikmpd. 7038 * 7039 * m will always be freed. 7040 */ 7041 static int 7042 key_api_dump(struct socket *so, struct mbuf *m0, 7043 const struct sadb_msghdr *mhp) 7044 { 7045 u_int16_t proto; 7046 u_int8_t satype; 7047 struct mbuf *n; 7048 int s; 7049 int error, len, ok; 7050 7051 /* map satype to proto */ 7052 satype = mhp->msg->sadb_msg_satype; 7053 proto = key_satype2proto(satype); 7054 if (proto == 0) { 7055 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7056 return key_senderror(so, m0, EINVAL); 7057 } 7058 7059 /* 7060 * If the requestor has insufficient socket-buffer space 7061 * for the entire chain, nobody gets any response to the DUMP. 7062 * XXX For now, only the requestor ever gets anything. 7063 * Moreover, if the requestor has any space at all, they receive 7064 * the entire chain, otherwise the request is refused with ENOBUFS. 7065 */ 7066 if (sbspace(&so->so_rcv) <= 0) { 7067 return key_senderror(so, m0, ENOBUFS); 7068 } 7069 7070 s = splsoftnet(); 7071 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7072 splx(s); 7073 7074 if (n == NULL) { 7075 return key_senderror(so, m0, ENOENT); 7076 } 7077 { 7078 uint64_t *ps = PFKEY_STAT_GETREF(); 7079 ps[PFKEY_STAT_IN_TOTAL]++; 7080 ps[PFKEY_STAT_IN_BYTES] += len; 7081 PFKEY_STAT_PUTREF(); 7082 } 7083 7084 /* 7085 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7086 * The requestor receives either the entire chain, or an 7087 * error message with ENOBUFS. 7088 * 7089 * sbappendaddrchain() takes the chain of entries, one 7090 * packet-record per SPD entry, prepends the key_src sockaddr 7091 * to each packet-record, links the sockaddr mbufs into a new 7092 * list of records, then appends the entire resulting 7093 * list to the requesting socket. 7094 */ 7095 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 7096 SB_PRIO_ONESHOT_OVERFLOW); 7097 7098 if (!ok) { 7099 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7100 m_freem(n); 7101 return key_senderror(so, m0, ENOBUFS); 7102 } 7103 7104 m_freem(m0); 7105 return 0; 7106 } 7107 7108 /* 7109 * SADB_X_PROMISC processing 7110 * 7111 * m will always be freed. 7112 */ 7113 static int 7114 key_api_promisc(struct socket *so, struct mbuf *m, 7115 const struct sadb_msghdr *mhp) 7116 { 7117 int olen; 7118 7119 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7120 7121 if (olen < sizeof(struct sadb_msg)) { 7122 #if 1 7123 return key_senderror(so, m, EINVAL); 7124 #else 7125 m_freem(m); 7126 return 0; 7127 #endif 7128 } else if (olen == sizeof(struct sadb_msg)) { 7129 /* enable/disable promisc mode */ 7130 struct keycb *kp = (struct keycb *)sotorawcb(so); 7131 if (kp == NULL) 7132 return key_senderror(so, m, EINVAL); 7133 mhp->msg->sadb_msg_errno = 0; 7134 switch (mhp->msg->sadb_msg_satype) { 7135 case 0: 7136 case 1: 7137 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7138 break; 7139 default: 7140 return key_senderror(so, m, EINVAL); 7141 } 7142 7143 /* send the original message back to everyone */ 7144 mhp->msg->sadb_msg_errno = 0; 7145 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7146 } else { 7147 /* send packet as is */ 7148 7149 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7150 7151 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7152 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7153 } 7154 } 7155 7156 static int (*key_api_typesw[]) (struct socket *, struct mbuf *, 7157 const struct sadb_msghdr *) = { 7158 NULL, /* SADB_RESERVED */ 7159 key_api_getspi, /* SADB_GETSPI */ 7160 key_api_update, /* SADB_UPDATE */ 7161 key_api_add, /* SADB_ADD */ 7162 key_api_delete, /* SADB_DELETE */ 7163 key_api_get, /* SADB_GET */ 7164 key_api_acquire, /* SADB_ACQUIRE */ 7165 key_api_register, /* SADB_REGISTER */ 7166 NULL, /* SADB_EXPIRE */ 7167 key_api_flush, /* SADB_FLUSH */ 7168 key_api_dump, /* SADB_DUMP */ 7169 key_api_promisc, /* SADB_X_PROMISC */ 7170 NULL, /* SADB_X_PCHANGE */ 7171 key_api_spdadd, /* SADB_X_SPDUPDATE */ 7172 key_api_spdadd, /* SADB_X_SPDADD */ 7173 key_api_spddelete, /* SADB_X_SPDDELETE */ 7174 key_api_spdget, /* SADB_X_SPDGET */ 7175 NULL, /* SADB_X_SPDACQUIRE */ 7176 key_api_spddump, /* SADB_X_SPDDUMP */ 7177 key_api_spdflush, /* SADB_X_SPDFLUSH */ 7178 key_api_spdadd, /* SADB_X_SPDSETIDX */ 7179 NULL, /* SADB_X_SPDEXPIRE */ 7180 key_api_spddelete2, /* SADB_X_SPDDELETE2 */ 7181 key_api_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7182 }; 7183 7184 /* 7185 * parse sadb_msg buffer to process PFKEYv2, 7186 * and create a data to response if needed. 7187 * I think to be dealed with mbuf directly. 7188 * IN: 7189 * msgp : pointer to pointer to a received buffer pulluped. 7190 * This is rewrited to response. 7191 * so : pointer to socket. 7192 * OUT: 7193 * length for buffer to send to user process. 7194 */ 7195 int 7196 key_parse(struct mbuf *m, struct socket *so) 7197 { 7198 struct sadb_msg *msg; 7199 struct sadb_msghdr mh; 7200 u_int orglen; 7201 int error; 7202 7203 KASSERT(m != NULL); 7204 KASSERT(so != NULL); 7205 7206 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7207 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7208 IPSECLOG(LOG_DEBUG, "passed sadb_msg\n"); 7209 kdebug_sadb(msg); 7210 } 7211 #endif 7212 7213 if (m->m_len < sizeof(struct sadb_msg)) { 7214 m = m_pullup(m, sizeof(struct sadb_msg)); 7215 if (!m) 7216 return ENOBUFS; 7217 } 7218 msg = mtod(m, struct sadb_msg *); 7219 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7220 7221 if ((m->m_flags & M_PKTHDR) == 0 || 7222 m->m_pkthdr.len != orglen) { 7223 IPSECLOG(LOG_DEBUG, "invalid message length.\n"); 7224 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7225 error = EINVAL; 7226 goto senderror; 7227 } 7228 7229 if (msg->sadb_msg_version != PF_KEY_V2) { 7230 IPSECLOG(LOG_DEBUG, "PF_KEY version %u is mismatched.\n", 7231 msg->sadb_msg_version); 7232 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7233 error = EINVAL; 7234 goto senderror; 7235 } 7236 7237 if (msg->sadb_msg_type > SADB_MAX) { 7238 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7239 msg->sadb_msg_type); 7240 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7241 error = EINVAL; 7242 goto senderror; 7243 } 7244 7245 /* for old-fashioned code - should be nuked */ 7246 if (m->m_pkthdr.len > MCLBYTES) { 7247 m_freem(m); 7248 return ENOBUFS; 7249 } 7250 if (m->m_next) { 7251 struct mbuf *n; 7252 7253 MGETHDR(n, M_DONTWAIT, MT_DATA); 7254 if (n && m->m_pkthdr.len > MHLEN) { 7255 MCLGET(n, M_DONTWAIT); 7256 if ((n->m_flags & M_EXT) == 0) { 7257 m_free(n); 7258 n = NULL; 7259 } 7260 } 7261 if (!n) { 7262 m_freem(m); 7263 return ENOBUFS; 7264 } 7265 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7266 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7267 n->m_next = NULL; 7268 m_freem(m); 7269 m = n; 7270 } 7271 7272 /* align the mbuf chain so that extensions are in contiguous region. */ 7273 error = key_align(m, &mh); 7274 if (error) 7275 return error; 7276 7277 if (m->m_next) { /*XXX*/ 7278 m_freem(m); 7279 return ENOBUFS; 7280 } 7281 7282 msg = mh.msg; 7283 7284 /* check SA type */ 7285 switch (msg->sadb_msg_satype) { 7286 case SADB_SATYPE_UNSPEC: 7287 switch (msg->sadb_msg_type) { 7288 case SADB_GETSPI: 7289 case SADB_UPDATE: 7290 case SADB_ADD: 7291 case SADB_DELETE: 7292 case SADB_GET: 7293 case SADB_ACQUIRE: 7294 case SADB_EXPIRE: 7295 IPSECLOG(LOG_DEBUG, 7296 "must specify satype when msg type=%u.\n", 7297 msg->sadb_msg_type); 7298 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7299 error = EINVAL; 7300 goto senderror; 7301 } 7302 break; 7303 case SADB_SATYPE_AH: 7304 case SADB_SATYPE_ESP: 7305 case SADB_X_SATYPE_IPCOMP: 7306 case SADB_X_SATYPE_TCPSIGNATURE: 7307 switch (msg->sadb_msg_type) { 7308 case SADB_X_SPDADD: 7309 case SADB_X_SPDDELETE: 7310 case SADB_X_SPDGET: 7311 case SADB_X_SPDDUMP: 7312 case SADB_X_SPDFLUSH: 7313 case SADB_X_SPDSETIDX: 7314 case SADB_X_SPDUPDATE: 7315 case SADB_X_SPDDELETE2: 7316 IPSECLOG(LOG_DEBUG, "illegal satype=%u\n", 7317 msg->sadb_msg_type); 7318 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7319 error = EINVAL; 7320 goto senderror; 7321 } 7322 break; 7323 case SADB_SATYPE_RSVP: 7324 case SADB_SATYPE_OSPFV2: 7325 case SADB_SATYPE_RIPV2: 7326 case SADB_SATYPE_MIP: 7327 IPSECLOG(LOG_DEBUG, "type %u isn't supported.\n", 7328 msg->sadb_msg_satype); 7329 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7330 error = EOPNOTSUPP; 7331 goto senderror; 7332 case 1: /* XXX: What does it do? */ 7333 if (msg->sadb_msg_type == SADB_X_PROMISC) 7334 break; 7335 /*FALLTHROUGH*/ 7336 default: 7337 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7338 msg->sadb_msg_satype); 7339 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7340 error = EINVAL; 7341 goto senderror; 7342 } 7343 7344 /* check field of upper layer protocol and address family */ 7345 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL && 7346 mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7347 struct sadb_address *src0, *dst0; 7348 u_int plen; 7349 7350 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7351 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7352 7353 /* check upper layer protocol */ 7354 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7355 IPSECLOG(LOG_DEBUG, "upper layer protocol mismatched.\n"); 7356 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7357 error = EINVAL; 7358 goto senderror; 7359 } 7360 7361 /* check family */ 7362 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7363 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7364 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 7365 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7366 error = EINVAL; 7367 goto senderror; 7368 } 7369 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7370 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7371 IPSECLOG(LOG_DEBUG, 7372 "address struct size mismatched.\n"); 7373 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7374 error = EINVAL; 7375 goto senderror; 7376 } 7377 7378 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7379 case AF_INET: 7380 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7381 sizeof(struct sockaddr_in)) { 7382 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7383 error = EINVAL; 7384 goto senderror; 7385 } 7386 break; 7387 case AF_INET6: 7388 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7389 sizeof(struct sockaddr_in6)) { 7390 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7391 error = EINVAL; 7392 goto senderror; 7393 } 7394 break; 7395 default: 7396 IPSECLOG(LOG_DEBUG, "unsupported address family.\n"); 7397 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7398 error = EAFNOSUPPORT; 7399 goto senderror; 7400 } 7401 7402 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7403 case AF_INET: 7404 plen = sizeof(struct in_addr) << 3; 7405 break; 7406 case AF_INET6: 7407 plen = sizeof(struct in6_addr) << 3; 7408 break; 7409 default: 7410 plen = 0; /*fool gcc*/ 7411 break; 7412 } 7413 7414 /* check max prefix length */ 7415 if (src0->sadb_address_prefixlen > plen || 7416 dst0->sadb_address_prefixlen > plen) { 7417 IPSECLOG(LOG_DEBUG, "illegal prefixlen.\n"); 7418 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7419 error = EINVAL; 7420 goto senderror; 7421 } 7422 7423 /* 7424 * prefixlen == 0 is valid because there can be a case when 7425 * all addresses are matched. 7426 */ 7427 } 7428 7429 if (msg->sadb_msg_type >= __arraycount(key_api_typesw) || 7430 key_api_typesw[msg->sadb_msg_type] == NULL) { 7431 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7432 error = EINVAL; 7433 goto senderror; 7434 } 7435 7436 return (*key_api_typesw[msg->sadb_msg_type])(so, m, &mh); 7437 7438 senderror: 7439 return key_senderror(so, m, error); 7440 } 7441 7442 static int 7443 key_senderror(struct socket *so, struct mbuf *m, int code) 7444 { 7445 struct sadb_msg *msg; 7446 7447 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7448 7449 msg = mtod(m, struct sadb_msg *); 7450 msg->sadb_msg_errno = code; 7451 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7452 } 7453 7454 /* 7455 * set the pointer to each header into message buffer. 7456 * m will be freed on error. 7457 * XXX larger-than-MCLBYTES extension? 7458 */ 7459 static int 7460 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7461 { 7462 struct mbuf *n; 7463 struct sadb_ext *ext; 7464 size_t off, end; 7465 int extlen; 7466 int toff; 7467 7468 KASSERT(m != NULL); 7469 KASSERT(mhp != NULL); 7470 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7471 7472 /* initialize */ 7473 memset(mhp, 0, sizeof(*mhp)); 7474 7475 mhp->msg = mtod(m, struct sadb_msg *); 7476 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7477 7478 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7479 extlen = end; /*just in case extlen is not updated*/ 7480 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7481 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7482 if (!n) { 7483 /* m is already freed */ 7484 return ENOBUFS; 7485 } 7486 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7487 7488 /* set pointer */ 7489 switch (ext->sadb_ext_type) { 7490 case SADB_EXT_SA: 7491 case SADB_EXT_ADDRESS_SRC: 7492 case SADB_EXT_ADDRESS_DST: 7493 case SADB_EXT_ADDRESS_PROXY: 7494 case SADB_EXT_LIFETIME_CURRENT: 7495 case SADB_EXT_LIFETIME_HARD: 7496 case SADB_EXT_LIFETIME_SOFT: 7497 case SADB_EXT_KEY_AUTH: 7498 case SADB_EXT_KEY_ENCRYPT: 7499 case SADB_EXT_IDENTITY_SRC: 7500 case SADB_EXT_IDENTITY_DST: 7501 case SADB_EXT_SENSITIVITY: 7502 case SADB_EXT_PROPOSAL: 7503 case SADB_EXT_SUPPORTED_AUTH: 7504 case SADB_EXT_SUPPORTED_ENCRYPT: 7505 case SADB_EXT_SPIRANGE: 7506 case SADB_X_EXT_POLICY: 7507 case SADB_X_EXT_SA2: 7508 case SADB_X_EXT_NAT_T_TYPE: 7509 case SADB_X_EXT_NAT_T_SPORT: 7510 case SADB_X_EXT_NAT_T_DPORT: 7511 case SADB_X_EXT_NAT_T_OAI: 7512 case SADB_X_EXT_NAT_T_OAR: 7513 case SADB_X_EXT_NAT_T_FRAG: 7514 /* duplicate check */ 7515 /* 7516 * XXX Are there duplication payloads of either 7517 * KEY_AUTH or KEY_ENCRYPT ? 7518 */ 7519 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7520 IPSECLOG(LOG_DEBUG, 7521 "duplicate ext_type %u is passed.\n", 7522 ext->sadb_ext_type); 7523 m_freem(m); 7524 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7525 return EINVAL; 7526 } 7527 break; 7528 default: 7529 IPSECLOG(LOG_DEBUG, "invalid ext_type %u is passed.\n", 7530 ext->sadb_ext_type); 7531 m_freem(m); 7532 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7533 return EINVAL; 7534 } 7535 7536 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7537 7538 if (key_validate_ext(ext, extlen)) { 7539 m_freem(m); 7540 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7541 return EINVAL; 7542 } 7543 7544 n = m_pulldown(m, off, extlen, &toff); 7545 if (!n) { 7546 /* m is already freed */ 7547 return ENOBUFS; 7548 } 7549 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7550 7551 mhp->ext[ext->sadb_ext_type] = ext; 7552 mhp->extoff[ext->sadb_ext_type] = off; 7553 mhp->extlen[ext->sadb_ext_type] = extlen; 7554 } 7555 7556 if (off != end) { 7557 m_freem(m); 7558 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7559 return EINVAL; 7560 } 7561 7562 return 0; 7563 } 7564 7565 static int 7566 key_validate_ext(const struct sadb_ext *ext, int len) 7567 { 7568 const struct sockaddr *sa; 7569 enum { NONE, ADDR } checktype = NONE; 7570 int baselen = 0; 7571 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7572 7573 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7574 return EINVAL; 7575 7576 /* if it does not match minimum/maximum length, bail */ 7577 if (ext->sadb_ext_type >= __arraycount(minsize) || 7578 ext->sadb_ext_type >= __arraycount(maxsize)) 7579 return EINVAL; 7580 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7581 return EINVAL; 7582 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7583 return EINVAL; 7584 7585 /* more checks based on sadb_ext_type XXX need more */ 7586 switch (ext->sadb_ext_type) { 7587 case SADB_EXT_ADDRESS_SRC: 7588 case SADB_EXT_ADDRESS_DST: 7589 case SADB_EXT_ADDRESS_PROXY: 7590 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7591 checktype = ADDR; 7592 break; 7593 case SADB_EXT_IDENTITY_SRC: 7594 case SADB_EXT_IDENTITY_DST: 7595 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7596 SADB_X_IDENTTYPE_ADDR) { 7597 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7598 checktype = ADDR; 7599 } else 7600 checktype = NONE; 7601 break; 7602 default: 7603 checktype = NONE; 7604 break; 7605 } 7606 7607 switch (checktype) { 7608 case NONE: 7609 break; 7610 case ADDR: 7611 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7612 if (len < baselen + sal) 7613 return EINVAL; 7614 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7615 return EINVAL; 7616 break; 7617 } 7618 7619 return 0; 7620 } 7621 7622 static int 7623 key_do_init(void) 7624 { 7625 int i, error; 7626 7627 mutex_init(&key_mtx, MUTEX_DEFAULT, IPL_NONE); 7628 7629 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7630 7631 callout_init(&key_timehandler_ch, 0); 7632 error = workqueue_create(&key_timehandler_wq, "key_timehandler", 7633 key_timehandler_work, NULL, PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 7634 if (error != 0) 7635 panic("%s: workqueue_create failed (%d)\n", __func__, error); 7636 7637 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7638 LIST_INIT(&sptree[i]); 7639 } 7640 7641 LIST_INIT(&sahtree); 7642 7643 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7644 LIST_INIT(®tree[i]); 7645 } 7646 7647 #ifndef IPSEC_NONBLOCK_ACQUIRE 7648 LIST_INIT(&acqtree); 7649 #endif 7650 #ifdef notyet 7651 LIST_INIT(&spacqtree); 7652 #endif 7653 7654 /* system default */ 7655 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7656 ip4_def_policy.refcnt++; /*never reclaim this*/ 7657 7658 #ifdef INET6 7659 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7660 ip6_def_policy.refcnt++; /*never reclaim this*/ 7661 #endif 7662 7663 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7664 7665 /* initialize key statistics */ 7666 keystat.getspi_count = 1; 7667 7668 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7669 7670 return (0); 7671 } 7672 7673 void 7674 key_init(void) 7675 { 7676 static ONCE_DECL(key_init_once); 7677 7678 sysctl_net_keyv2_setup(NULL); 7679 sysctl_net_key_compat_setup(NULL); 7680 7681 RUN_ONCE(&key_init_once, key_do_init); 7682 } 7683 7684 /* 7685 * XXX: maybe This function is called after INBOUND IPsec processing. 7686 * 7687 * Special check for tunnel-mode packets. 7688 * We must make some checks for consistency between inner and outer IP header. 7689 * 7690 * xxx more checks to be provided 7691 */ 7692 int 7693 key_checktunnelsanity( 7694 struct secasvar *sav, 7695 u_int family, 7696 void *src, 7697 void *dst 7698 ) 7699 { 7700 7701 /* XXX: check inner IP header */ 7702 7703 return 1; 7704 } 7705 7706 #if 0 7707 #define hostnamelen strlen(hostname) 7708 7709 /* 7710 * Get FQDN for the host. 7711 * If the administrator configured hostname (by hostname(1)) without 7712 * domain name, returns nothing. 7713 */ 7714 static const char * 7715 key_getfqdn(void) 7716 { 7717 int i; 7718 int hasdot; 7719 static char fqdn[MAXHOSTNAMELEN + 1]; 7720 7721 if (!hostnamelen) 7722 return NULL; 7723 7724 /* check if it comes with domain name. */ 7725 hasdot = 0; 7726 for (i = 0; i < hostnamelen; i++) { 7727 if (hostname[i] == '.') 7728 hasdot++; 7729 } 7730 if (!hasdot) 7731 return NULL; 7732 7733 /* NOTE: hostname may not be NUL-terminated. */ 7734 memset(fqdn, 0, sizeof(fqdn)); 7735 memcpy(fqdn, hostname, hostnamelen); 7736 fqdn[hostnamelen] = '\0'; 7737 return fqdn; 7738 } 7739 7740 /* 7741 * get username@FQDN for the host/user. 7742 */ 7743 static const char * 7744 key_getuserfqdn(void) 7745 { 7746 const char *host; 7747 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7748 struct proc *p = curproc; 7749 char *q; 7750 7751 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7752 return NULL; 7753 if (!(host = key_getfqdn())) 7754 return NULL; 7755 7756 /* NOTE: s_login may not be-NUL terminated. */ 7757 memset(userfqdn, 0, sizeof(userfqdn)); 7758 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7759 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7760 q = userfqdn + strlen(userfqdn); 7761 *q++ = '@'; 7762 memcpy(q, host, strlen(host)); 7763 q += strlen(host); 7764 *q++ = '\0'; 7765 7766 return userfqdn; 7767 } 7768 #endif 7769 7770 /* record data transfer on SA, and update timestamps */ 7771 void 7772 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7773 { 7774 7775 KASSERT(sav != NULL); 7776 KASSERT(sav->lft_c != NULL); 7777 KASSERT(m != NULL); 7778 7779 /* 7780 * XXX Currently, there is a difference of bytes size 7781 * between inbound and outbound processing. 7782 */ 7783 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7784 /* to check bytes lifetime is done in key_timehandler(). */ 7785 7786 /* 7787 * We use the number of packets as the unit of 7788 * sadb_lifetime_allocations. We increment the variable 7789 * whenever {esp,ah}_{in,out}put is called. 7790 */ 7791 sav->lft_c->sadb_lifetime_allocations++; 7792 /* XXX check for expires? */ 7793 7794 /* 7795 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7796 * in seconds. HARD and SOFT lifetime are measured by the time 7797 * difference (again in seconds) from sadb_lifetime_usetime. 7798 * 7799 * usetime 7800 * v expire expire 7801 * -----+-----+--------+---> t 7802 * <--------------> HARD 7803 * <-----> SOFT 7804 */ 7805 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7806 /* XXX check for expires? */ 7807 7808 return; 7809 } 7810 7811 /* dumb version */ 7812 void 7813 key_sa_routechange(struct sockaddr *dst) 7814 { 7815 struct secashead *sah; 7816 struct route *ro; 7817 const struct sockaddr *sa; 7818 7819 LIST_FOREACH(sah, &sahtree, chain) { 7820 ro = &sah->sa_route; 7821 sa = rtcache_getdst(ro); 7822 if (sa != NULL && dst->sa_len == sa->sa_len && 7823 memcmp(dst, sa, dst->sa_len) == 0) 7824 rtcache_free(ro); 7825 } 7826 7827 return; 7828 } 7829 7830 static void 7831 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7832 { 7833 7834 KASSERT(sav != NULL); 7835 7836 if (sav->state == state) 7837 return; 7838 7839 KASSERT(__LIST_CHAINED(sav)); 7840 LIST_REMOVE(sav, chain); 7841 7842 sav->state = state; 7843 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7844 } 7845 7846 /* XXX too much? */ 7847 static struct mbuf * 7848 key_alloc_mbuf(int l) 7849 { 7850 struct mbuf *m = NULL, *n; 7851 int len, t; 7852 7853 len = l; 7854 while (len > 0) { 7855 MGET(n, M_DONTWAIT, MT_DATA); 7856 if (n && len > MLEN) 7857 MCLGET(n, M_DONTWAIT); 7858 if (!n) { 7859 m_freem(m); 7860 return NULL; 7861 } 7862 7863 n->m_next = NULL; 7864 n->m_len = 0; 7865 n->m_len = M_TRAILINGSPACE(n); 7866 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7867 if (n->m_len > len) { 7868 t = (n->m_len - len) & ~(sizeof(long) - 1); 7869 n->m_data += t; 7870 n->m_len = len; 7871 } 7872 7873 len -= n->m_len; 7874 7875 if (m) 7876 m_cat(m, n); 7877 else 7878 m = n; 7879 } 7880 7881 return m; 7882 } 7883 7884 static struct mbuf * 7885 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7886 { 7887 struct secashead *sah; 7888 struct secasvar *sav; 7889 u_int16_t proto; 7890 u_int8_t satype; 7891 u_int8_t state; 7892 int cnt; 7893 struct mbuf *m, *n; 7894 7895 /* map satype to proto */ 7896 proto = key_satype2proto(req_satype); 7897 if (proto == 0) { 7898 *errorp = EINVAL; 7899 return (NULL); 7900 } 7901 7902 /* count sav entries to be sent to the userland. */ 7903 cnt = 0; 7904 LIST_FOREACH(sah, &sahtree, chain) { 7905 if (req_satype != SADB_SATYPE_UNSPEC && 7906 proto != sah->saidx.proto) 7907 continue; 7908 7909 SASTATE_ANY_FOREACH(state) { 7910 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7911 cnt++; 7912 } 7913 } 7914 } 7915 7916 if (cnt == 0) { 7917 *errorp = ENOENT; 7918 return (NULL); 7919 } 7920 7921 /* send this to the userland, one at a time. */ 7922 m = NULL; 7923 LIST_FOREACH(sah, &sahtree, chain) { 7924 if (req_satype != SADB_SATYPE_UNSPEC && 7925 proto != sah->saidx.proto) 7926 continue; 7927 7928 /* map proto to satype */ 7929 satype = key_proto2satype(sah->saidx.proto); 7930 if (satype == 0) { 7931 m_freem(m); 7932 *errorp = EINVAL; 7933 return (NULL); 7934 } 7935 7936 SASTATE_ANY_FOREACH(state) { 7937 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7938 n = key_setdumpsa(sav, SADB_DUMP, satype, 7939 --cnt, pid); 7940 if (!n) { 7941 m_freem(m); 7942 *errorp = ENOBUFS; 7943 return (NULL); 7944 } 7945 7946 if (!m) 7947 m = n; 7948 else 7949 m_cat(m, n); 7950 } 7951 } 7952 } 7953 7954 if (!m) { 7955 *errorp = EINVAL; 7956 return (NULL); 7957 } 7958 7959 if ((m->m_flags & M_PKTHDR) != 0) { 7960 m->m_pkthdr.len = 0; 7961 for (n = m; n; n = n->m_next) 7962 m->m_pkthdr.len += n->m_len; 7963 } 7964 7965 *errorp = 0; 7966 return (m); 7967 } 7968 7969 static struct mbuf * 7970 key_setspddump(int *errorp, pid_t pid) 7971 { 7972 struct secpolicy *sp; 7973 int cnt; 7974 u_int dir; 7975 struct mbuf *m, *n; 7976 7977 /* search SPD entry and get buffer size. */ 7978 cnt = 0; 7979 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7980 LIST_FOREACH(sp, &sptree[dir], chain) { 7981 cnt++; 7982 } 7983 } 7984 7985 if (cnt == 0) { 7986 *errorp = ENOENT; 7987 return (NULL); 7988 } 7989 7990 m = NULL; 7991 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7992 LIST_FOREACH(sp, &sptree[dir], chain) { 7993 --cnt; 7994 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 7995 7996 if (!n) { 7997 *errorp = ENOBUFS; 7998 m_freem(m); 7999 return (NULL); 8000 } 8001 if (!m) 8002 m = n; 8003 else { 8004 m->m_pkthdr.len += n->m_pkthdr.len; 8005 m_cat(m, n); 8006 } 8007 } 8008 } 8009 8010 *errorp = 0; 8011 return (m); 8012 } 8013 8014 int 8015 key_get_used(void) { 8016 return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || 8017 !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); 8018 } 8019 8020 void 8021 key_update_used(void) 8022 { 8023 switch (ipsec_enabled) { 8024 default: 8025 case 0: 8026 #ifdef notyet 8027 /* XXX: racy */ 8028 ipsec_used = 0; 8029 #endif 8030 break; 8031 case 1: 8032 #ifndef notyet 8033 /* XXX: racy */ 8034 if (!ipsec_used) 8035 #endif 8036 ipsec_used = key_get_used(); 8037 break; 8038 case 2: 8039 ipsec_used = 1; 8040 break; 8041 } 8042 } 8043 8044 static int 8045 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8046 { 8047 struct mbuf *m, *n; 8048 int err2 = 0; 8049 char *p, *ep; 8050 size_t len; 8051 int s, error; 8052 8053 if (newp) 8054 return (EPERM); 8055 if (namelen != 1) 8056 return (EINVAL); 8057 8058 s = splsoftnet(); 8059 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8060 splx(s); 8061 if (!m) 8062 return (error); 8063 if (!oldp) 8064 *oldlenp = m->m_pkthdr.len; 8065 else { 8066 p = oldp; 8067 if (*oldlenp < m->m_pkthdr.len) { 8068 err2 = ENOMEM; 8069 ep = p + *oldlenp; 8070 } else { 8071 *oldlenp = m->m_pkthdr.len; 8072 ep = p + m->m_pkthdr.len; 8073 } 8074 for (n = m; n; n = n->m_next) { 8075 len = (ep - p < n->m_len) ? 8076 ep - p : n->m_len; 8077 error = copyout(mtod(n, const void *), p, len); 8078 p += len; 8079 if (error) 8080 break; 8081 } 8082 if (error == 0) 8083 error = err2; 8084 } 8085 m_freem(m); 8086 8087 return (error); 8088 } 8089 8090 static int 8091 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8092 { 8093 struct mbuf *m, *n; 8094 int err2 = 0; 8095 char *p, *ep; 8096 size_t len; 8097 int s, error; 8098 8099 if (newp) 8100 return (EPERM); 8101 if (namelen != 0) 8102 return (EINVAL); 8103 8104 s = splsoftnet(); 8105 m = key_setspddump(&error, l->l_proc->p_pid); 8106 splx(s); 8107 if (!m) 8108 return (error); 8109 if (!oldp) 8110 *oldlenp = m->m_pkthdr.len; 8111 else { 8112 p = oldp; 8113 if (*oldlenp < m->m_pkthdr.len) { 8114 err2 = ENOMEM; 8115 ep = p + *oldlenp; 8116 } else { 8117 *oldlenp = m->m_pkthdr.len; 8118 ep = p + m->m_pkthdr.len; 8119 } 8120 for (n = m; n; n = n->m_next) { 8121 len = (ep - p < n->m_len) ? ep - p : n->m_len; 8122 error = copyout(mtod(n, const void *), p, len); 8123 p += len; 8124 if (error) 8125 break; 8126 } 8127 if (error == 0) 8128 error = err2; 8129 } 8130 m_freem(m); 8131 8132 return (error); 8133 } 8134 8135 /* 8136 * Create sysctl tree for native IPSEC key knobs, originally 8137 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8138 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8139 * and in any case the part of our sysctl namespace used for dumping the 8140 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8141 * namespace, for API reasons. 8142 * 8143 * Pending a consensus on the right way to fix this, add a level of 8144 * indirection in how we number the `native' IPSEC key nodes; 8145 * and (as requested by Andrew Brown) move registration of the 8146 * KAME-compatible names to a separate function. 8147 */ 8148 #if 0 8149 # define IPSEC_PFKEY PF_KEY_V2 8150 # define IPSEC_PFKEY_NAME "keyv2" 8151 #else 8152 # define IPSEC_PFKEY PF_KEY 8153 # define IPSEC_PFKEY_NAME "key" 8154 #endif 8155 8156 static int 8157 sysctl_net_key_stats(SYSCTLFN_ARGS) 8158 { 8159 8160 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8161 } 8162 8163 static void 8164 sysctl_net_keyv2_setup(struct sysctllog **clog) 8165 { 8166 8167 sysctl_createv(clog, 0, NULL, NULL, 8168 CTLFLAG_PERMANENT, 8169 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8170 NULL, 0, NULL, 0, 8171 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8172 8173 sysctl_createv(clog, 0, NULL, NULL, 8174 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8175 CTLTYPE_INT, "debug", NULL, 8176 NULL, 0, &key_debug_level, 0, 8177 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8178 sysctl_createv(clog, 0, NULL, NULL, 8179 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8180 CTLTYPE_INT, "spi_try", NULL, 8181 NULL, 0, &key_spi_trycnt, 0, 8182 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8183 sysctl_createv(clog, 0, NULL, NULL, 8184 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8185 CTLTYPE_INT, "spi_min_value", NULL, 8186 NULL, 0, &key_spi_minval, 0, 8187 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8188 sysctl_createv(clog, 0, NULL, NULL, 8189 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8190 CTLTYPE_INT, "spi_max_value", NULL, 8191 NULL, 0, &key_spi_maxval, 0, 8192 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8193 sysctl_createv(clog, 0, NULL, NULL, 8194 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8195 CTLTYPE_INT, "random_int", NULL, 8196 NULL, 0, &key_int_random, 0, 8197 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8198 sysctl_createv(clog, 0, NULL, NULL, 8199 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8200 CTLTYPE_INT, "larval_lifetime", NULL, 8201 NULL, 0, &key_larval_lifetime, 0, 8202 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8203 sysctl_createv(clog, 0, NULL, NULL, 8204 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8205 CTLTYPE_INT, "blockacq_count", NULL, 8206 NULL, 0, &key_blockacq_count, 0, 8207 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8208 sysctl_createv(clog, 0, NULL, NULL, 8209 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8210 CTLTYPE_INT, "blockacq_lifetime", NULL, 8211 NULL, 0, &key_blockacq_lifetime, 0, 8212 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8213 sysctl_createv(clog, 0, NULL, NULL, 8214 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8215 CTLTYPE_INT, "esp_keymin", NULL, 8216 NULL, 0, &ipsec_esp_keymin, 0, 8217 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8218 sysctl_createv(clog, 0, NULL, NULL, 8219 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8220 CTLTYPE_INT, "prefered_oldsa", NULL, 8221 NULL, 0, &key_prefered_oldsa, 0, 8222 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8223 sysctl_createv(clog, 0, NULL, NULL, 8224 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8225 CTLTYPE_INT, "esp_auth", NULL, 8226 NULL, 0, &ipsec_esp_auth, 0, 8227 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8228 sysctl_createv(clog, 0, NULL, NULL, 8229 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8230 CTLTYPE_INT, "ah_keymin", NULL, 8231 NULL, 0, &ipsec_ah_keymin, 0, 8232 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8233 sysctl_createv(clog, 0, NULL, NULL, 8234 CTLFLAG_PERMANENT, 8235 CTLTYPE_STRUCT, "stats", 8236 SYSCTL_DESCR("PF_KEY statistics"), 8237 sysctl_net_key_stats, 0, NULL, 0, 8238 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8239 } 8240 8241 /* 8242 * Register sysctl names used by setkey(8). For historical reasons, 8243 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8244 * for both IPSEC and KAME IPSEC. 8245 */ 8246 static void 8247 sysctl_net_key_compat_setup(struct sysctllog **clog) 8248 { 8249 8250 sysctl_createv(clog, 0, NULL, NULL, 8251 CTLFLAG_PERMANENT, 8252 CTLTYPE_NODE, "key", NULL, 8253 NULL, 0, NULL, 0, 8254 CTL_NET, PF_KEY, CTL_EOL); 8255 8256 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8257 sysctl_createv(clog, 0, NULL, NULL, 8258 CTLFLAG_PERMANENT, 8259 CTLTYPE_STRUCT, "dumpsa", NULL, 8260 sysctl_net_key_dumpsa, 0, NULL, 0, 8261 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8262 sysctl_createv(clog, 0, NULL, NULL, 8263 CTLFLAG_PERMANENT, 8264 CTLTYPE_STRUCT, "dumpsp", NULL, 8265 sysctl_net_key_dumpsp, 0, NULL, 0, 8266 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8267 } 8268
Indexes created Tue Sep 23 02:09:52 GMT 2025