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sys/netipsec/key.c
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1 /* $FreeBSD: releng/10.1/sys/netipsec/key.c 270053 2014-08-16 13:55:44Z bz $ */ 2 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ 3 4 /*- 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * This code is referd to RFC 2367 35 */ 36 37 #include "opt_inet.h" 38 #include "opt_inet6.h" 39 #include "opt_ipsec.h" 40 41 #include <sys/types.h> 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/lock.h> 46 #include <sys/mutex.h> 47 #include <sys/mbuf.h> 48 #include <sys/domain.h> 49 #include <sys/protosw.h> 50 #include <sys/malloc.h> 51 #include <sys/socket.h> 52 #include <sys/socketvar.h> 53 #include <sys/sysctl.h> 54 #include <sys/errno.h> 55 #include <sys/proc.h> 56 #include <sys/queue.h> 57 #include <sys/refcount.h> 58 #include <sys/syslog.h> 59 60 #include <net/if.h> 61 #include <net/route.h> 62 #include <net/raw_cb.h> 63 #include <net/vnet.h> 64 65 #include <netinet/in.h> 66 #include <netinet/in_systm.h> 67 #include <netinet/ip.h> 68 #include <netinet/in_var.h> 69 70 #ifdef INET6 71 #include <netinet/ip6.h> 72 #include <netinet6/in6_var.h> 73 #include <netinet6/ip6_var.h> 74 #endif /* INET6 */ 75 76 #if defined(INET) || defined(INET6) 77 #include <netinet/in_pcb.h> 78 #endif 79 #ifdef INET6 80 #include <netinet6/in6_pcb.h> 81 #endif /* INET6 */ 82 83 #include <net/pfkeyv2.h> 84 #include <netipsec/keydb.h> 85 #include <netipsec/key.h> 86 #include <netipsec/keysock.h> 87 #include <netipsec/key_debug.h> 88 89 #include <netipsec/ipsec.h> 90 #ifdef INET6 91 #include <netipsec/ipsec6.h> 92 #endif 93 94 #include <netipsec/xform.h> 95 96 #include <machine/stdarg.h> 97 98 /* randomness */ 99 #include <sys/random.h> 100 101 #define FULLMASK 0xff 102 #define _BITS(bytes) ((bytes) << 3) 103 104 /* 105 * Note on SA reference counting: 106 * - SAs that are not in DEAD state will have (total external reference + 1) 107 * following value in reference count field. they cannot be freed and are 108 * referenced from SA header. 109 * - SAs that are in DEAD state will have (total external reference) 110 * in reference count field. they are ready to be freed. reference from 111 * SA header will be removed in key_delsav(), when the reference count 112 * field hits 0 (= no external reference other than from SA header. 113 */ 114 115 VNET_DEFINE(u_int32_t, key_debug_level) = 0; 116 static VNET_DEFINE(u_int, key_spi_trycnt) = 1000; 117 static VNET_DEFINE(u_int32_t, key_spi_minval) = 0x100; 118 static VNET_DEFINE(u_int32_t, key_spi_maxval) = 0x0fffffff; /* XXX */ 119 static VNET_DEFINE(u_int32_t, policy_id) = 0; 120 /*interval to initialize randseed,1(m)*/ 121 static VNET_DEFINE(u_int, key_int_random) = 60; 122 /* interval to expire acquiring, 30(s)*/ 123 static VNET_DEFINE(u_int, key_larval_lifetime) = 30; 124 /* counter for blocking SADB_ACQUIRE.*/ 125 static VNET_DEFINE(int, key_blockacq_count) = 10; 126 /* lifetime for blocking SADB_ACQUIRE.*/ 127 static VNET_DEFINE(int, key_blockacq_lifetime) = 20; 128 /* preferred old sa rather than new sa.*/ 129 static VNET_DEFINE(int, key_preferred_oldsa) = 1; 130 #define V_key_spi_trycnt VNET(key_spi_trycnt) 131 #define V_key_spi_minval VNET(key_spi_minval) 132 #define V_key_spi_maxval VNET(key_spi_maxval) 133 #define V_policy_id VNET(policy_id) 134 #define V_key_int_random VNET(key_int_random) 135 #define V_key_larval_lifetime VNET(key_larval_lifetime) 136 #define V_key_blockacq_count VNET(key_blockacq_count) 137 #define V_key_blockacq_lifetime VNET(key_blockacq_lifetime) 138 #define V_key_preferred_oldsa VNET(key_preferred_oldsa) 139 140 static VNET_DEFINE(u_int32_t, acq_seq) = 0; 141 #define V_acq_seq VNET(acq_seq) 142 143 /* SPD */ 144 static VNET_DEFINE(LIST_HEAD(_sptree, secpolicy), sptree[IPSEC_DIR_MAX]); 145 #define V_sptree VNET(sptree) 146 static struct mtx sptree_lock; 147 #define SPTREE_LOCK_INIT() \ 148 mtx_init(&sptree_lock, "sptree", \ 149 "fast ipsec security policy database", MTX_DEF) 150 #define SPTREE_LOCK_DESTROY() mtx_destroy(&sptree_lock) 151 #define SPTREE_LOCK() mtx_lock(&sptree_lock) 152 #define SPTREE_UNLOCK() mtx_unlock(&sptree_lock) 153 #define SPTREE_LOCK_ASSERT() mtx_assert(&sptree_lock, MA_OWNED) 154 155 static VNET_DEFINE(LIST_HEAD(_sahtree, secashead), sahtree); /* SAD */ 156 #define V_sahtree VNET(sahtree) 157 static struct mtx sahtree_lock; 158 #define SAHTREE_LOCK_INIT() \ 159 mtx_init(&sahtree_lock, "sahtree", \ 160 "fast ipsec security association database", MTX_DEF) 161 #define SAHTREE_LOCK_DESTROY() mtx_destroy(&sahtree_lock) 162 #define SAHTREE_LOCK() mtx_lock(&sahtree_lock) 163 #define SAHTREE_UNLOCK() mtx_unlock(&sahtree_lock) 164 #define SAHTREE_LOCK_ASSERT() mtx_assert(&sahtree_lock, MA_OWNED) 165 166 /* registed list */ 167 static VNET_DEFINE(LIST_HEAD(_regtree, secreg), regtree[SADB_SATYPE_MAX + 1]); 168 #define V_regtree VNET(regtree) 169 static struct mtx regtree_lock; 170 #define REGTREE_LOCK_INIT() \ 171 mtx_init(®tree_lock, "regtree", "fast ipsec regtree", MTX_DEF) 172 #define REGTREE_LOCK_DESTROY() mtx_destroy(®tree_lock) 173 #define REGTREE_LOCK() mtx_lock(®tree_lock) 174 #define REGTREE_UNLOCK() mtx_unlock(®tree_lock) 175 #define REGTREE_LOCK_ASSERT() mtx_assert(®tree_lock, MA_OWNED) 176 177 static VNET_DEFINE(LIST_HEAD(_acqtree, secacq), acqtree); /* acquiring list */ 178 #define V_acqtree VNET(acqtree) 179 static struct mtx acq_lock; 180 #define ACQ_LOCK_INIT() \ 181 mtx_init(&acq_lock, "acqtree", "fast ipsec acquire list", MTX_DEF) 182 #define ACQ_LOCK_DESTROY() mtx_destroy(&acq_lock) 183 #define ACQ_LOCK() mtx_lock(&acq_lock) 184 #define ACQ_UNLOCK() mtx_unlock(&acq_lock) 185 #define ACQ_LOCK_ASSERT() mtx_assert(&acq_lock, MA_OWNED) 186 187 /* SP acquiring list */ 188 static VNET_DEFINE(LIST_HEAD(_spacqtree, secspacq), spacqtree); 189 #define V_spacqtree VNET(spacqtree) 190 static struct mtx spacq_lock; 191 #define SPACQ_LOCK_INIT() \ 192 mtx_init(&spacq_lock, "spacqtree", \ 193 "fast ipsec security policy acquire list", MTX_DEF) 194 #define SPACQ_LOCK_DESTROY() mtx_destroy(&spacq_lock) 195 #define SPACQ_LOCK() mtx_lock(&spacq_lock) 196 #define SPACQ_UNLOCK() mtx_unlock(&spacq_lock) 197 #define SPACQ_LOCK_ASSERT() mtx_assert(&spacq_lock, MA_OWNED) 198 199 /* search order for SAs */ 200 static const u_int saorder_state_valid_prefer_old[] = { 201 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 202 }; 203 static const u_int saorder_state_valid_prefer_new[] = { 204 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 205 }; 206 static const u_int saorder_state_alive[] = { 207 /* except DEAD */ 208 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 209 }; 210 static const u_int saorder_state_any[] = { 211 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 212 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 213 }; 214 215 static const int minsize[] = { 216 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 217 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 218 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 219 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 220 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 221 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 222 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 223 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 224 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 225 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 226 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 227 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 228 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 229 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 230 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 231 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 232 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 233 0, /* SADB_X_EXT_KMPRIVATE */ 234 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 235 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 236 sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */ 237 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */ 238 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */ 239 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 240 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 241 sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */ 242 }; 243 static const int maxsize[] = { 244 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 245 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 246 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 247 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 248 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 249 0, /* SADB_EXT_ADDRESS_SRC */ 250 0, /* SADB_EXT_ADDRESS_DST */ 251 0, /* SADB_EXT_ADDRESS_PROXY */ 252 0, /* SADB_EXT_KEY_AUTH */ 253 0, /* SADB_EXT_KEY_ENCRYPT */ 254 0, /* SADB_EXT_IDENTITY_SRC */ 255 0, /* SADB_EXT_IDENTITY_DST */ 256 0, /* SADB_EXT_SENSITIVITY */ 257 0, /* SADB_EXT_PROPOSAL */ 258 0, /* SADB_EXT_SUPPORTED_AUTH */ 259 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 260 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 261 0, /* SADB_X_EXT_KMPRIVATE */ 262 0, /* SADB_X_EXT_POLICY */ 263 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 264 sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */ 265 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */ 266 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */ 267 0, /* SADB_X_EXT_NAT_T_OAI */ 268 0, /* SADB_X_EXT_NAT_T_OAR */ 269 sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */ 270 }; 271 272 static VNET_DEFINE(int, ipsec_esp_keymin) = 256; 273 static VNET_DEFINE(int, ipsec_esp_auth) = 0; 274 static VNET_DEFINE(int, ipsec_ah_keymin) = 128; 275 276 #define V_ipsec_esp_keymin VNET(ipsec_esp_keymin) 277 #define V_ipsec_esp_auth VNET(ipsec_esp_auth) 278 #define V_ipsec_ah_keymin VNET(ipsec_ah_keymin) 279 280 #ifdef SYSCTL_DECL 281 SYSCTL_DECL(_net_key); 282 #endif 283 284 SYSCTL_VNET_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, 285 CTLFLAG_RW, &VNET_NAME(key_debug_level), 0, ""); 286 287 /* max count of trial for the decision of spi value */ 288 SYSCTL_VNET_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, 289 CTLFLAG_RW, &VNET_NAME(key_spi_trycnt), 0, ""); 290 291 /* minimum spi value to allocate automatically. */ 292 SYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MIN_VALUE, 293 spi_minval, CTLFLAG_RW, &VNET_NAME(key_spi_minval), 0, ""); 294 295 /* maximun spi value to allocate automatically. */ 296 SYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MAX_VALUE, 297 spi_maxval, CTLFLAG_RW, &VNET_NAME(key_spi_maxval), 0, ""); 298 299 /* interval to initialize randseed */ 300 SYSCTL_VNET_INT(_net_key, KEYCTL_RANDOM_INT, 301 int_random, CTLFLAG_RW, &VNET_NAME(key_int_random), 0, ""); 302 303 /* lifetime for larval SA */ 304 SYSCTL_VNET_INT(_net_key, KEYCTL_LARVAL_LIFETIME, 305 larval_lifetime, CTLFLAG_RW, &VNET_NAME(key_larval_lifetime), 0, ""); 306 307 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 308 SYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, 309 blockacq_count, CTLFLAG_RW, &VNET_NAME(key_blockacq_count), 0, ""); 310 311 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 312 SYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, 313 blockacq_lifetime, CTLFLAG_RW, &VNET_NAME(key_blockacq_lifetime), 0, ""); 314 315 /* ESP auth */ 316 SYSCTL_VNET_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, 317 CTLFLAG_RW, &VNET_NAME(ipsec_esp_auth), 0, ""); 318 319 /* minimum ESP key length */ 320 SYSCTL_VNET_INT(_net_key, KEYCTL_ESP_KEYMIN, 321 esp_keymin, CTLFLAG_RW, &VNET_NAME(ipsec_esp_keymin), 0, ""); 322 323 /* minimum AH key length */ 324 SYSCTL_VNET_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, 325 CTLFLAG_RW, &VNET_NAME(ipsec_ah_keymin), 0, ""); 326 327 /* perfered old SA rather than new SA */ 328 SYSCTL_VNET_INT(_net_key, KEYCTL_PREFERED_OLDSA, 329 preferred_oldsa, CTLFLAG_RW, &VNET_NAME(key_preferred_oldsa), 0, ""); 330 331 #define __LIST_CHAINED(elm) \ 332 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 333 #define LIST_INSERT_TAIL(head, elm, type, field) \ 334 do {\ 335 struct type *curelm = LIST_FIRST(head); \ 336 if (curelm == NULL) {\ 337 LIST_INSERT_HEAD(head, elm, field); \ 338 } else { \ 339 while (LIST_NEXT(curelm, field)) \ 340 curelm = LIST_NEXT(curelm, field);\ 341 LIST_INSERT_AFTER(curelm, elm, field);\ 342 }\ 343 } while (0) 344 345 #define KEY_CHKSASTATE(head, sav, name) \ 346 do { \ 347 if ((head) != (sav)) { \ 348 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 349 (name), (head), (sav))); \ 350 continue; \ 351 } \ 352 } while (0) 353 354 #define KEY_CHKSPDIR(head, sp, name) \ 355 do { \ 356 if ((head) != (sp)) { \ 357 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 358 "anyway continue.\n", \ 359 (name), (head), (sp))); \ 360 } \ 361 } while (0) 362 363 MALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association"); 364 MALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head"); 365 MALLOC_DEFINE(M_IPSEC_SP, "ipsecpolicy", "ipsec security policy"); 366 MALLOC_DEFINE(M_IPSEC_SR, "ipsecrequest", "ipsec security request"); 367 MALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous"); 368 MALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire"); 369 MALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire"); 370 371 /* 372 * set parameters into secpolicyindex buffer. 373 * Must allocate secpolicyindex buffer passed to this function. 374 */ 375 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 376 do { \ 377 bzero((idx), sizeof(struct secpolicyindex)); \ 378 (idx)->dir = (_dir); \ 379 (idx)->prefs = (ps); \ 380 (idx)->prefd = (pd); \ 381 (idx)->ul_proto = (ulp); \ 382 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 383 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 384 } while (0) 385 386 /* 387 * set parameters into secasindex buffer. 388 * Must allocate secasindex buffer before calling this function. 389 */ 390 #define KEY_SETSECASIDX(p, m, r, s, d, idx) \ 391 do { \ 392 bzero((idx), sizeof(struct secasindex)); \ 393 (idx)->proto = (p); \ 394 (idx)->mode = (m); \ 395 (idx)->reqid = (r); \ 396 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 397 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 398 } while (0) 399 400 /* key statistics */ 401 struct _keystat { 402 u_long getspi_count; /* the avarage of count to try to get new SPI */ 403 } keystat; 404 405 struct sadb_msghdr { 406 struct sadb_msg *msg; 407 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 408 int extoff[SADB_EXT_MAX + 1]; 409 int extlen[SADB_EXT_MAX + 1]; 410 }; 411 412 static struct secasvar *key_allocsa_policy __P((const struct secasindex *)); 413 static void key_freesp_so __P((struct secpolicy **)); 414 static struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int)); 415 static void key_delsp __P((struct secpolicy *)); 416 static struct secpolicy *key_getsp __P((struct secpolicyindex *)); 417 static void _key_delsp(struct secpolicy *sp); 418 static struct secpolicy *key_getspbyid __P((u_int32_t)); 419 static u_int32_t key_newreqid __P((void)); 420 static struct mbuf *key_gather_mbuf __P((struct mbuf *, 421 const struct sadb_msghdr *, int, int, ...)); 422 static int key_spdadd __P((struct socket *, struct mbuf *, 423 const struct sadb_msghdr *)); 424 static u_int32_t key_getnewspid __P((void)); 425 static int key_spddelete __P((struct socket *, struct mbuf *, 426 const struct sadb_msghdr *)); 427 static int key_spddelete2 __P((struct socket *, struct mbuf *, 428 const struct sadb_msghdr *)); 429 static int key_spdget __P((struct socket *, struct mbuf *, 430 const struct sadb_msghdr *)); 431 static int key_spdflush __P((struct socket *, struct mbuf *, 432 const struct sadb_msghdr *)); 433 static int key_spddump __P((struct socket *, struct mbuf *, 434 const struct sadb_msghdr *)); 435 static struct mbuf *key_setdumpsp __P((struct secpolicy *, 436 u_int8_t, u_int32_t, u_int32_t)); 437 static u_int key_getspreqmsglen __P((struct secpolicy *)); 438 static int key_spdexpire __P((struct secpolicy *)); 439 static struct secashead *key_newsah __P((struct secasindex *)); 440 static void key_delsah __P((struct secashead *)); 441 static struct secasvar *key_newsav __P((struct mbuf *, 442 const struct sadb_msghdr *, struct secashead *, int *, 443 const char*, int)); 444 #define KEY_NEWSAV(m, sadb, sah, e) \ 445 key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 446 static void key_delsav __P((struct secasvar *)); 447 static struct secashead *key_getsah __P((struct secasindex *)); 448 static struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t)); 449 static struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t)); 450 static int key_setsaval __P((struct secasvar *, struct mbuf *, 451 const struct sadb_msghdr *)); 452 static int key_mature __P((struct secasvar *)); 453 static struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t, 454 u_int8_t, u_int32_t, u_int32_t)); 455 static struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t, 456 u_int32_t, pid_t, u_int16_t)); 457 static struct mbuf *key_setsadbsa __P((struct secasvar *)); 458 static struct mbuf *key_setsadbaddr __P((u_int16_t, 459 const struct sockaddr *, u_int8_t, u_int16_t)); 460 #ifdef IPSEC_NAT_T 461 static struct mbuf *key_setsadbxport(u_int16_t, u_int16_t); 462 static struct mbuf *key_setsadbxtype(u_int16_t); 463 #endif 464 static void key_porttosaddr(struct sockaddr *, u_int16_t); 465 #define KEY_PORTTOSADDR(saddr, port) \ 466 key_porttosaddr((struct sockaddr *)(saddr), (port)) 467 static struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int32_t)); 468 static struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t, 469 u_int32_t)); 470 static struct seckey *key_dup_keymsg(const struct sadb_key *, u_int, 471 struct malloc_type *); 472 static struct seclifetime *key_dup_lifemsg(const struct sadb_lifetime *src, 473 struct malloc_type *type); 474 #ifdef INET6 475 static int key_ismyaddr6 __P((struct sockaddr_in6 *)); 476 #endif 477 478 /* flags for key_cmpsaidx() */ 479 #define CMP_HEAD 1 /* protocol, addresses. */ 480 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 481 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 482 #define CMP_EXACTLY 4 /* all elements. */ 483 static int key_cmpsaidx 484 __P((const struct secasindex *, const struct secasindex *, int)); 485 486 static int key_cmpspidx_exactly 487 __P((struct secpolicyindex *, struct secpolicyindex *)); 488 static int key_cmpspidx_withmask 489 __P((struct secpolicyindex *, struct secpolicyindex *)); 490 static int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int)); 491 static int key_bbcmp __P((const void *, const void *, u_int)); 492 static u_int16_t key_satype2proto __P((u_int8_t)); 493 static u_int8_t key_proto2satype __P((u_int16_t)); 494 495 static int key_getspi __P((struct socket *, struct mbuf *, 496 const struct sadb_msghdr *)); 497 static u_int32_t key_do_getnewspi __P((struct sadb_spirange *, 498 struct secasindex *)); 499 static int key_update __P((struct socket *, struct mbuf *, 500 const struct sadb_msghdr *)); 501 #ifdef IPSEC_DOSEQCHECK 502 static struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t)); 503 #endif 504 static int key_add __P((struct socket *, struct mbuf *, 505 const struct sadb_msghdr *)); 506 static int key_setident __P((struct secashead *, struct mbuf *, 507 const struct sadb_msghdr *)); 508 static struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *, 509 const struct sadb_msghdr *)); 510 static int key_delete __P((struct socket *, struct mbuf *, 511 const struct sadb_msghdr *)); 512 static int key_get __P((struct socket *, struct mbuf *, 513 const struct sadb_msghdr *)); 514 515 static void key_getcomb_setlifetime __P((struct sadb_comb *)); 516 static struct mbuf *key_getcomb_esp __P((void)); 517 static struct mbuf *key_getcomb_ah __P((void)); 518 static struct mbuf *key_getcomb_ipcomp __P((void)); 519 static struct mbuf *key_getprop __P((const struct secasindex *)); 520 521 static int key_acquire __P((const struct secasindex *, struct secpolicy *)); 522 static struct secacq *key_newacq __P((const struct secasindex *)); 523 static struct secacq *key_getacq __P((const struct secasindex *)); 524 static struct secacq *key_getacqbyseq __P((u_int32_t)); 525 static struct secspacq *key_newspacq __P((struct secpolicyindex *)); 526 static struct secspacq *key_getspacq __P((struct secpolicyindex *)); 527 static int key_acquire2 __P((struct socket *, struct mbuf *, 528 const struct sadb_msghdr *)); 529 static int key_register __P((struct socket *, struct mbuf *, 530 const struct sadb_msghdr *)); 531 static int key_expire __P((struct secasvar *)); 532 static int key_flush __P((struct socket *, struct mbuf *, 533 const struct sadb_msghdr *)); 534 static int key_dump __P((struct socket *, struct mbuf *, 535 const struct sadb_msghdr *)); 536 static int key_promisc __P((struct socket *, struct mbuf *, 537 const struct sadb_msghdr *)); 538 static int key_senderror __P((struct socket *, struct mbuf *, int)); 539 static int key_validate_ext __P((const struct sadb_ext *, int)); 540 static int key_align __P((struct mbuf *, struct sadb_msghdr *)); 541 static struct mbuf *key_setlifetime(struct seclifetime *src, 542 u_int16_t exttype); 543 static struct mbuf *key_setkey(struct seckey *src, u_int16_t exttype); 544 545 #if 0 546 static const char *key_getfqdn __P((void)); 547 static const char *key_getuserfqdn __P((void)); 548 #endif 549 static void key_sa_chgstate __P((struct secasvar *, u_int8_t)); 550 551 static __inline void 552 sa_initref(struct secasvar *sav) 553 { 554 555 refcount_init(&sav->refcnt, 1); 556 } 557 static __inline void 558 sa_addref(struct secasvar *sav) 559 { 560 561 refcount_acquire(&sav->refcnt); 562 IPSEC_ASSERT(sav->refcnt != 0, ("SA refcnt overflow")); 563 } 564 static __inline int 565 sa_delref(struct secasvar *sav) 566 { 567 568 IPSEC_ASSERT(sav->refcnt > 0, ("SA refcnt underflow")); 569 return (refcount_release(&sav->refcnt)); 570 } 571 572 #define SP_ADDREF(p) do { \ 573 (p)->refcnt++; \ 574 IPSEC_ASSERT((p)->refcnt != 0, ("SP refcnt overflow")); \ 575 } while (0) 576 #define SP_DELREF(p) do { \ 577 IPSEC_ASSERT((p)->refcnt > 0, ("SP refcnt underflow")); \ 578 (p)->refcnt--; \ 579 } while (0) 580 581 582 /* 583 * Update the refcnt while holding the SPTREE lock. 584 */ 585 void 586 key_addref(struct secpolicy *sp) 587 { 588 SPTREE_LOCK(); 589 SP_ADDREF(sp); 590 SPTREE_UNLOCK(); 591 } 592 593 /* 594 * Return 0 when there are known to be no SP's for the specified 595 * direction. Otherwise return 1. This is used by IPsec code 596 * to optimize performance. 597 */ 598 int 599 key_havesp(u_int dir) 600 { 601 602 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 603 LIST_FIRST(&V_sptree[dir]) != NULL : 1); 604 } 605 606 /* %%% IPsec policy management */ 607 /* 608 * allocating a SP for OUTBOUND or INBOUND packet. 609 * Must call key_freesp() later. 610 * OUT: NULL: not found 611 * others: found and return the pointer. 612 */ 613 struct secpolicy * 614 key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 615 { 616 struct secpolicy *sp; 617 618 IPSEC_ASSERT(spidx != NULL, ("null spidx")); 619 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 620 ("invalid direction %u", dir)); 621 622 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 623 printf("DP %s from %s:%u\n", __func__, where, tag)); 624 625 /* get a SP entry */ 626 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 627 printf("*** objects\n"); 628 kdebug_secpolicyindex(spidx)); 629 630 SPTREE_LOCK(); 631 LIST_FOREACH(sp, &V_sptree[dir], chain) { 632 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 633 printf("*** in SPD\n"); 634 kdebug_secpolicyindex(&sp->spidx)); 635 636 if (sp->state == IPSEC_SPSTATE_DEAD) 637 continue; 638 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 639 goto found; 640 } 641 sp = NULL; 642 found: 643 if (sp) { 644 /* sanity check */ 645 KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 646 647 /* found a SPD entry */ 648 sp->lastused = time_second; 649 SP_ADDREF(sp); 650 } 651 SPTREE_UNLOCK(); 652 653 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 654 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 655 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 656 return sp; 657 } 658 659 /* 660 * allocating a SP for OUTBOUND or INBOUND packet. 661 * Must call key_freesp() later. 662 * OUT: NULL: not found 663 * others: found and return the pointer. 664 */ 665 struct secpolicy * 666 key_allocsp2(u_int32_t spi, 667 union sockaddr_union *dst, 668 u_int8_t proto, 669 u_int dir, 670 const char* where, int tag) 671 { 672 struct secpolicy *sp; 673 674 IPSEC_ASSERT(dst != NULL, ("null dst")); 675 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 676 ("invalid direction %u", dir)); 677 678 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 679 printf("DP %s from %s:%u\n", __func__, where, tag)); 680 681 /* get a SP entry */ 682 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 683 printf("*** objects\n"); 684 printf("spi %u proto %u dir %u\n", spi, proto, dir); 685 kdebug_sockaddr(&dst->sa)); 686 687 SPTREE_LOCK(); 688 LIST_FOREACH(sp, &V_sptree[dir], chain) { 689 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 690 printf("*** in SPD\n"); 691 kdebug_secpolicyindex(&sp->spidx)); 692 693 if (sp->state == IPSEC_SPSTATE_DEAD) 694 continue; 695 /* compare simple values, then dst address */ 696 if (sp->spidx.ul_proto != proto) 697 continue; 698 /* NB: spi's must exist and match */ 699 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 700 continue; 701 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 702 goto found; 703 } 704 sp = NULL; 705 found: 706 if (sp) { 707 /* sanity check */ 708 KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 709 710 /* found a SPD entry */ 711 sp->lastused = time_second; 712 SP_ADDREF(sp); 713 } 714 SPTREE_UNLOCK(); 715 716 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 717 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 718 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 719 return sp; 720 } 721 722 #if 0 723 /* 724 * return a policy that matches this particular inbound packet. 725 * XXX slow 726 */ 727 struct secpolicy * 728 key_gettunnel(const struct sockaddr *osrc, 729 const struct sockaddr *odst, 730 const struct sockaddr *isrc, 731 const struct sockaddr *idst, 732 const char* where, int tag) 733 { 734 struct secpolicy *sp; 735 const int dir = IPSEC_DIR_INBOUND; 736 struct ipsecrequest *r1, *r2, *p; 737 struct secpolicyindex spidx; 738 739 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 740 printf("DP %s from %s:%u\n", __func__, where, tag)); 741 742 if (isrc->sa_family != idst->sa_family) { 743 ipseclog((LOG_ERR, "%s: protocol family mismatched %d != %d\n.", 744 __func__, isrc->sa_family, idst->sa_family)); 745 sp = NULL; 746 goto done; 747 } 748 749 SPTREE_LOCK(); 750 LIST_FOREACH(sp, &V_sptree[dir], chain) { 751 if (sp->state == IPSEC_SPSTATE_DEAD) 752 continue; 753 754 r1 = r2 = NULL; 755 for (p = sp->req; p; p = p->next) { 756 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 757 continue; 758 759 r1 = r2; 760 r2 = p; 761 762 if (!r1) { 763 /* here we look at address matches only */ 764 spidx = sp->spidx; 765 if (isrc->sa_len > sizeof(spidx.src) || 766 idst->sa_len > sizeof(spidx.dst)) 767 continue; 768 bcopy(isrc, &spidx.src, isrc->sa_len); 769 bcopy(idst, &spidx.dst, idst->sa_len); 770 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 771 continue; 772 } else { 773 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 774 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 775 continue; 776 } 777 778 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 779 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 780 continue; 781 782 goto found; 783 } 784 } 785 sp = NULL; 786 found: 787 if (sp) { 788 sp->lastused = time_second; 789 SP_ADDREF(sp); 790 } 791 SPTREE_UNLOCK(); 792 done: 793 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 794 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 795 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 796 return sp; 797 } 798 #endif 799 800 /* 801 * allocating an SA entry for an *OUTBOUND* packet. 802 * checking each request entries in SP, and acquire an SA if need. 803 * OUT: 0: there are valid requests. 804 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 805 */ 806 int 807 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 808 { 809 u_int level; 810 int error; 811 struct secasvar *sav; 812 813 IPSEC_ASSERT(isr != NULL, ("null isr")); 814 IPSEC_ASSERT(saidx != NULL, ("null saidx")); 815 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 816 saidx->mode == IPSEC_MODE_TUNNEL, 817 ("unexpected policy %u", saidx->mode)); 818 819 /* 820 * XXX guard against protocol callbacks from the crypto 821 * thread as they reference ipsecrequest.sav which we 822 * temporarily null out below. Need to rethink how we 823 * handle bundled SA's in the callback thread. 824 */ 825 IPSECREQUEST_LOCK_ASSERT(isr); 826 827 /* get current level */ 828 level = ipsec_get_reqlevel(isr); 829 830 /* 831 * We check new SA in the IPsec request because a different 832 * SA may be involved each time this request is checked, either 833 * because new SAs are being configured, or this request is 834 * associated with an unconnected datagram socket, or this request 835 * is associated with a system default policy. 836 * 837 * key_allocsa_policy should allocate the oldest SA available. 838 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 839 */ 840 sav = key_allocsa_policy(saidx); 841 if (sav != isr->sav) { 842 /* SA need to be updated. */ 843 if (!IPSECREQUEST_UPGRADE(isr)) { 844 /* Kick everyone off. */ 845 IPSECREQUEST_UNLOCK(isr); 846 IPSECREQUEST_WLOCK(isr); 847 } 848 if (isr->sav != NULL) 849 KEY_FREESAV(&isr->sav); 850 isr->sav = sav; 851 IPSECREQUEST_DOWNGRADE(isr); 852 } else if (sav != NULL) 853 KEY_FREESAV(&sav); 854 855 /* When there is SA. */ 856 if (isr->sav != NULL) { 857 if (isr->sav->state != SADB_SASTATE_MATURE && 858 isr->sav->state != SADB_SASTATE_DYING) 859 return EINVAL; 860 return 0; 861 } 862 863 /* there is no SA */ 864 error = key_acquire(saidx, isr->sp); 865 if (error != 0) { 866 /* XXX What should I do ? */ 867 ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 868 __func__, error)); 869 return error; 870 } 871 872 if (level != IPSEC_LEVEL_REQUIRE) { 873 /* XXX sigh, the interface to this routine is botched */ 874 IPSEC_ASSERT(isr->sav == NULL, ("unexpected SA")); 875 return 0; 876 } else { 877 return ENOENT; 878 } 879 } 880 881 /* 882 * allocating a SA for policy entry from SAD. 883 * NOTE: searching SAD of aliving state. 884 * OUT: NULL: not found. 885 * others: found and return the pointer. 886 */ 887 static struct secasvar * 888 key_allocsa_policy(const struct secasindex *saidx) 889 { 890 #define N(a) _ARRAYLEN(a) 891 struct secashead *sah; 892 struct secasvar *sav; 893 u_int stateidx, arraysize; 894 const u_int *state_valid; 895 896 state_valid = NULL; /* silence gcc */ 897 arraysize = 0; /* silence gcc */ 898 899 SAHTREE_LOCK(); 900 LIST_FOREACH(sah, &V_sahtree, chain) { 901 if (sah->state == SADB_SASTATE_DEAD) 902 continue; 903 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) { 904 if (V_key_preferred_oldsa) { 905 state_valid = saorder_state_valid_prefer_old; 906 arraysize = N(saorder_state_valid_prefer_old); 907 } else { 908 state_valid = saorder_state_valid_prefer_new; 909 arraysize = N(saorder_state_valid_prefer_new); 910 } 911 break; 912 } 913 } 914 SAHTREE_UNLOCK(); 915 if (sah == NULL) 916 return NULL; 917 918 /* search valid state */ 919 for (stateidx = 0; stateidx < arraysize; stateidx++) { 920 sav = key_do_allocsa_policy(sah, state_valid[stateidx]); 921 if (sav != NULL) 922 return sav; 923 } 924 925 return NULL; 926 #undef N 927 } 928 929 /* 930 * searching SAD with direction, protocol, mode and state. 931 * called by key_allocsa_policy(). 932 * OUT: 933 * NULL : not found 934 * others : found, pointer to a SA. 935 */ 936 static struct secasvar * 937 key_do_allocsa_policy(struct secashead *sah, u_int state) 938 { 939 struct secasvar *sav, *nextsav, *candidate, *d; 940 941 /* initilize */ 942 candidate = NULL; 943 944 SAHTREE_LOCK(); 945 for (sav = LIST_FIRST(&sah->savtree[state]); 946 sav != NULL; 947 sav = nextsav) { 948 949 nextsav = LIST_NEXT(sav, chain); 950 951 /* sanity check */ 952 KEY_CHKSASTATE(sav->state, state, __func__); 953 954 /* initialize */ 955 if (candidate == NULL) { 956 candidate = sav; 957 continue; 958 } 959 960 /* Which SA is the better ? */ 961 962 IPSEC_ASSERT(candidate->lft_c != NULL, 963 ("null candidate lifetime")); 964 IPSEC_ASSERT(sav->lft_c != NULL, ("null sav lifetime")); 965 966 /* What the best method is to compare ? */ 967 if (V_key_preferred_oldsa) { 968 if (candidate->lft_c->addtime > 969 sav->lft_c->addtime) { 970 candidate = sav; 971 } 972 continue; 973 /*NOTREACHED*/ 974 } 975 976 /* preferred new sa rather than old sa */ 977 if (candidate->lft_c->addtime < 978 sav->lft_c->addtime) { 979 d = candidate; 980 candidate = sav; 981 } else 982 d = sav; 983 984 /* 985 * prepared to delete the SA when there is more 986 * suitable candidate and the lifetime of the SA is not 987 * permanent. 988 */ 989 if (d->lft_h->addtime != 0) { 990 struct mbuf *m, *result; 991 u_int8_t satype; 992 993 key_sa_chgstate(d, SADB_SASTATE_DEAD); 994 995 IPSEC_ASSERT(d->refcnt > 0, ("bogus ref count")); 996 997 satype = key_proto2satype(d->sah->saidx.proto); 998 if (satype == 0) 999 goto msgfail; 1000 1001 m = key_setsadbmsg(SADB_DELETE, 0, 1002 satype, 0, 0, d->refcnt - 1); 1003 if (!m) 1004 goto msgfail; 1005 result = m; 1006 1007 /* set sadb_address for saidx's. */ 1008 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1009 &d->sah->saidx.src.sa, 1010 d->sah->saidx.src.sa.sa_len << 3, 1011 IPSEC_ULPROTO_ANY); 1012 if (!m) 1013 goto msgfail; 1014 m_cat(result, m); 1015 1016 /* set sadb_address for saidx's. */ 1017 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1018 &d->sah->saidx.dst.sa, 1019 d->sah->saidx.dst.sa.sa_len << 3, 1020 IPSEC_ULPROTO_ANY); 1021 if (!m) 1022 goto msgfail; 1023 m_cat(result, m); 1024 1025 /* create SA extension */ 1026 m = key_setsadbsa(d); 1027 if (!m) 1028 goto msgfail; 1029 m_cat(result, m); 1030 1031 if (result->m_len < sizeof(struct sadb_msg)) { 1032 result = m_pullup(result, 1033 sizeof(struct sadb_msg)); 1034 if (result == NULL) 1035 goto msgfail; 1036 } 1037 1038 result->m_pkthdr.len = 0; 1039 for (m = result; m; m = m->m_next) 1040 result->m_pkthdr.len += m->m_len; 1041 mtod(result, struct sadb_msg *)->sadb_msg_len = 1042 PFKEY_UNIT64(result->m_pkthdr.len); 1043 1044 if (key_sendup_mbuf(NULL, result, 1045 KEY_SENDUP_REGISTERED)) 1046 goto msgfail; 1047 msgfail: 1048 KEY_FREESAV(&d); 1049 } 1050 } 1051 if (candidate) { 1052 sa_addref(candidate); 1053 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1054 printf("DP %s cause refcnt++:%d SA:%p\n", 1055 __func__, candidate->refcnt, candidate)); 1056 } 1057 SAHTREE_UNLOCK(); 1058 1059 return candidate; 1060 } 1061 1062 /* 1063 * allocating a usable SA entry for a *INBOUND* packet. 1064 * Must call key_freesav() later. 1065 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1066 * NULL: not found, or error occured. 1067 * 1068 * In the comparison, no source address is used--for RFC2401 conformance. 1069 * To quote, from section 4.1: 1070 * A security association is uniquely identified by a triple consisting 1071 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1072 * security protocol (AH or ESP) identifier. 1073 * Note that, however, we do need to keep source address in IPsec SA. 1074 * IKE specification and PF_KEY specification do assume that we 1075 * keep source address in IPsec SA. We see a tricky situation here. 1076 */ 1077 struct secasvar * 1078 key_allocsa( 1079 union sockaddr_union *dst, 1080 u_int proto, 1081 u_int32_t spi, 1082 const char* where, int tag) 1083 { 1084 struct secashead *sah; 1085 struct secasvar *sav; 1086 u_int stateidx, arraysize, state; 1087 const u_int *saorder_state_valid; 1088 #ifdef IPSEC_NAT_T 1089 int natt_chkport; 1090 #endif 1091 1092 IPSEC_ASSERT(dst != NULL, ("null dst address")); 1093 1094 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1095 printf("DP %s from %s:%u\n", __func__, where, tag)); 1096 1097 #ifdef IPSEC_NAT_T 1098 natt_chkport = (dst->sa.sa_family == AF_INET && 1099 dst->sa.sa_len == sizeof(struct sockaddr_in) && 1100 dst->sin.sin_port != 0); 1101 #endif 1102 1103 /* 1104 * searching SAD. 1105 * XXX: to be checked internal IP header somewhere. Also when 1106 * IPsec tunnel packet is received. But ESP tunnel mode is 1107 * encrypted so we can't check internal IP header. 1108 */ 1109 SAHTREE_LOCK(); 1110 if (V_key_preferred_oldsa) { 1111 saorder_state_valid = saorder_state_valid_prefer_old; 1112 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1113 } else { 1114 saorder_state_valid = saorder_state_valid_prefer_new; 1115 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1116 } 1117 LIST_FOREACH(sah, &V_sahtree, chain) { 1118 int checkport; 1119 1120 /* search valid state */ 1121 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1122 state = saorder_state_valid[stateidx]; 1123 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1124 /* sanity check */ 1125 KEY_CHKSASTATE(sav->state, state, __func__); 1126 /* do not return entries w/ unusable state */ 1127 if (sav->state != SADB_SASTATE_MATURE && 1128 sav->state != SADB_SASTATE_DYING) 1129 continue; 1130 if (proto != sav->sah->saidx.proto) 1131 continue; 1132 if (spi != sav->spi) 1133 continue; 1134 checkport = 0; 1135 #ifdef IPSEC_NAT_T 1136 /* 1137 * Really only check ports when this is a NAT-T 1138 * SA. Otherwise other lookups providing ports 1139 * might suffer. 1140 */ 1141 if (sav->natt_type && natt_chkport) 1142 checkport = 1; 1143 #endif 1144 #if 0 /* don't check src */ 1145 /* check src address */ 1146 if (key_sockaddrcmp(&src->sa, 1147 &sav->sah->saidx.src.sa, checkport) != 0) 1148 continue; 1149 #endif 1150 /* check dst address */ 1151 if (key_sockaddrcmp(&dst->sa, 1152 &sav->sah->saidx.dst.sa, checkport) != 0) 1153 continue; 1154 sa_addref(sav); 1155 goto done; 1156 } 1157 } 1158 } 1159 sav = NULL; 1160 done: 1161 SAHTREE_UNLOCK(); 1162 1163 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1164 printf("DP %s return SA:%p; refcnt %u\n", __func__, 1165 sav, sav ? sav->refcnt : 0)); 1166 return sav; 1167 } 1168 1169 /* 1170 * Must be called after calling key_allocsp(). 1171 * For both the packet without socket and key_freeso(). 1172 */ 1173 void 1174 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1175 { 1176 struct secpolicy *sp = *spp; 1177 1178 IPSEC_ASSERT(sp != NULL, ("null sp")); 1179 1180 SPTREE_LOCK(); 1181 SP_DELREF(sp); 1182 1183 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1184 printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1185 __func__, sp, sp->id, where, tag, sp->refcnt)); 1186 1187 if (sp->refcnt == 0) { 1188 *spp = NULL; 1189 key_delsp(sp); 1190 } 1191 SPTREE_UNLOCK(); 1192 } 1193 1194 /* 1195 * Must be called after calling key_allocsp(). 1196 * For the packet with socket. 1197 */ 1198 void 1199 key_freeso(struct socket *so) 1200 { 1201 IPSEC_ASSERT(so != NULL, ("null so")); 1202 1203 switch (so->so_proto->pr_domain->dom_family) { 1204 #if defined(INET) || defined(INET6) 1205 #ifdef INET 1206 case PF_INET: 1207 #endif 1208 #ifdef INET6 1209 case PF_INET6: 1210 #endif 1211 { 1212 struct inpcb *pcb = sotoinpcb(so); 1213 1214 /* Does it have a PCB ? */ 1215 if (pcb == NULL) 1216 return; 1217 key_freesp_so(&pcb->inp_sp->sp_in); 1218 key_freesp_so(&pcb->inp_sp->sp_out); 1219 } 1220 break; 1221 #endif /* INET || INET6 */ 1222 default: 1223 ipseclog((LOG_DEBUG, "%s: unknown address family=%d.\n", 1224 __func__, so->so_proto->pr_domain->dom_family)); 1225 return; 1226 } 1227 } 1228 1229 static void 1230 key_freesp_so(struct secpolicy **sp) 1231 { 1232 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("null sp")); 1233 1234 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1235 (*sp)->policy == IPSEC_POLICY_BYPASS) 1236 return; 1237 1238 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1239 ("invalid policy %u", (*sp)->policy)); 1240 KEY_FREESP(sp); 1241 } 1242 1243 void 1244 key_addrefsa(struct secasvar *sav, const char* where, int tag) 1245 { 1246 1247 IPSEC_ASSERT(sav != NULL, ("null sav")); 1248 IPSEC_ASSERT(sav->refcnt > 0, ("refcount must exist")); 1249 1250 sa_addref(sav); 1251 } 1252 1253 /* 1254 * Must be called after calling key_allocsa(). 1255 * This function is called by key_freesp() to free some SA allocated 1256 * for a policy. 1257 */ 1258 void 1259 key_freesav(struct secasvar **psav, const char* where, int tag) 1260 { 1261 struct secasvar *sav = *psav; 1262 1263 IPSEC_ASSERT(sav != NULL, ("null sav")); 1264 1265 if (sa_delref(sav)) { 1266 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1267 printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1268 __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1269 *psav = NULL; 1270 key_delsav(sav); 1271 } else { 1272 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1273 printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1274 __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1275 } 1276 } 1277 1278 /* %%% SPD management */ 1279 /* 1280 * free security policy entry. 1281 */ 1282 static void 1283 key_delsp(struct secpolicy *sp) 1284 { 1285 struct ipsecrequest *isr, *nextisr; 1286 1287 IPSEC_ASSERT(sp != NULL, ("null sp")); 1288 SPTREE_LOCK_ASSERT(); 1289 1290 sp->state = IPSEC_SPSTATE_DEAD; 1291 1292 IPSEC_ASSERT(sp->refcnt == 0, 1293 ("SP with references deleted (refcnt %u)", sp->refcnt)); 1294 1295 /* remove from SP index */ 1296 if (__LIST_CHAINED(sp)) 1297 LIST_REMOVE(sp, chain); 1298 1299 for (isr = sp->req; isr != NULL; isr = nextisr) { 1300 if (isr->sav != NULL) { 1301 KEY_FREESAV(&isr->sav); 1302 isr->sav = NULL; 1303 } 1304 1305 nextisr = isr->next; 1306 ipsec_delisr(isr); 1307 } 1308 _key_delsp(sp); 1309 } 1310 1311 /* 1312 * search SPD 1313 * OUT: NULL : not found 1314 * others : found, pointer to a SP. 1315 */ 1316 static struct secpolicy * 1317 key_getsp(struct secpolicyindex *spidx) 1318 { 1319 struct secpolicy *sp; 1320 1321 IPSEC_ASSERT(spidx != NULL, ("null spidx")); 1322 1323 SPTREE_LOCK(); 1324 LIST_FOREACH(sp, &V_sptree[spidx->dir], chain) { 1325 if (sp->state == IPSEC_SPSTATE_DEAD) 1326 continue; 1327 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1328 SP_ADDREF(sp); 1329 break; 1330 } 1331 } 1332 SPTREE_UNLOCK(); 1333 1334 return sp; 1335 } 1336 1337 /* 1338 * get SP by index. 1339 * OUT: NULL : not found 1340 * others : found, pointer to a SP. 1341 */ 1342 static struct secpolicy * 1343 key_getspbyid(u_int32_t id) 1344 { 1345 struct secpolicy *sp; 1346 1347 SPTREE_LOCK(); 1348 LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_INBOUND], chain) { 1349 if (sp->state == IPSEC_SPSTATE_DEAD) 1350 continue; 1351 if (sp->id == id) { 1352 SP_ADDREF(sp); 1353 goto done; 1354 } 1355 } 1356 1357 LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_OUTBOUND], chain) { 1358 if (sp->state == IPSEC_SPSTATE_DEAD) 1359 continue; 1360 if (sp->id == id) { 1361 SP_ADDREF(sp); 1362 goto done; 1363 } 1364 } 1365 done: 1366 SPTREE_UNLOCK(); 1367 1368 return sp; 1369 } 1370 1371 struct secpolicy * 1372 key_newsp(const char* where, int tag) 1373 { 1374 struct secpolicy *newsp = NULL; 1375 1376 newsp = (struct secpolicy *) 1377 malloc(sizeof(struct secpolicy), M_IPSEC_SP, M_NOWAIT|M_ZERO); 1378 if (newsp) { 1379 SECPOLICY_LOCK_INIT(newsp); 1380 newsp->refcnt = 1; 1381 newsp->req = NULL; 1382 } 1383 1384 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1385 printf("DP %s from %s:%u return SP:%p\n", __func__, 1386 where, tag, newsp)); 1387 return newsp; 1388 } 1389 1390 static void 1391 _key_delsp(struct secpolicy *sp) 1392 { 1393 SECPOLICY_LOCK_DESTROY(sp); 1394 free(sp, M_IPSEC_SP); 1395 } 1396 1397 /* 1398 * create secpolicy structure from sadb_x_policy structure. 1399 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1400 * so must be set properly later. 1401 */ 1402 struct secpolicy * 1403 key_msg2sp(xpl0, len, error) 1404 struct sadb_x_policy *xpl0; 1405 size_t len; 1406 int *error; 1407 { 1408 struct secpolicy *newsp; 1409 1410 IPSEC_ASSERT(xpl0 != NULL, ("null xpl0")); 1411 IPSEC_ASSERT(len >= sizeof(*xpl0), ("policy too short: %zu", len)); 1412 1413 if (len != PFKEY_EXTLEN(xpl0)) { 1414 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__)); 1415 *error = EINVAL; 1416 return NULL; 1417 } 1418 1419 if ((newsp = KEY_NEWSP()) == NULL) { 1420 *error = ENOBUFS; 1421 return NULL; 1422 } 1423 1424 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1425 newsp->policy = xpl0->sadb_x_policy_type; 1426 1427 /* check policy */ 1428 switch (xpl0->sadb_x_policy_type) { 1429 case IPSEC_POLICY_DISCARD: 1430 case IPSEC_POLICY_NONE: 1431 case IPSEC_POLICY_ENTRUST: 1432 case IPSEC_POLICY_BYPASS: 1433 newsp->req = NULL; 1434 break; 1435 1436 case IPSEC_POLICY_IPSEC: 1437 { 1438 int tlen; 1439 struct sadb_x_ipsecrequest *xisr; 1440 struct ipsecrequest **p_isr = &newsp->req; 1441 1442 /* validity check */ 1443 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1444 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", 1445 __func__)); 1446 KEY_FREESP(&newsp); 1447 *error = EINVAL; 1448 return NULL; 1449 } 1450 1451 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1452 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1); 1453 1454 while (tlen > 0) { 1455 /* length check */ 1456 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1457 ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest " 1458 "length.\n", __func__)); 1459 KEY_FREESP(&newsp); 1460 *error = EINVAL; 1461 return NULL; 1462 } 1463 1464 /* allocate request buffer */ 1465 /* NB: data structure is zero'd */ 1466 *p_isr = ipsec_newisr(); 1467 if ((*p_isr) == NULL) { 1468 ipseclog((LOG_DEBUG, 1469 "%s: No more memory.\n", __func__)); 1470 KEY_FREESP(&newsp); 1471 *error = ENOBUFS; 1472 return NULL; 1473 } 1474 1475 /* set values */ 1476 switch (xisr->sadb_x_ipsecrequest_proto) { 1477 case IPPROTO_ESP: 1478 case IPPROTO_AH: 1479 case IPPROTO_IPCOMP: 1480 break; 1481 default: 1482 ipseclog((LOG_DEBUG, 1483 "%s: invalid proto type=%u\n", __func__, 1484 xisr->sadb_x_ipsecrequest_proto)); 1485 KEY_FREESP(&newsp); 1486 *error = EPROTONOSUPPORT; 1487 return NULL; 1488 } 1489 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1490 1491 switch (xisr->sadb_x_ipsecrequest_mode) { 1492 case IPSEC_MODE_TRANSPORT: 1493 case IPSEC_MODE_TUNNEL: 1494 break; 1495 case IPSEC_MODE_ANY: 1496 default: 1497 ipseclog((LOG_DEBUG, 1498 "%s: invalid mode=%u\n", __func__, 1499 xisr->sadb_x_ipsecrequest_mode)); 1500 KEY_FREESP(&newsp); 1501 *error = EINVAL; 1502 return NULL; 1503 } 1504 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1505 1506 switch (xisr->sadb_x_ipsecrequest_level) { 1507 case IPSEC_LEVEL_DEFAULT: 1508 case IPSEC_LEVEL_USE: 1509 case IPSEC_LEVEL_REQUIRE: 1510 break; 1511 case IPSEC_LEVEL_UNIQUE: 1512 /* validity check */ 1513 /* 1514 * If range violation of reqid, kernel will 1515 * update it, don't refuse it. 1516 */ 1517 if (xisr->sadb_x_ipsecrequest_reqid 1518 > IPSEC_MANUAL_REQID_MAX) { 1519 ipseclog((LOG_DEBUG, 1520 "%s: reqid=%d range " 1521 "violation, updated by kernel.\n", 1522 __func__, 1523 xisr->sadb_x_ipsecrequest_reqid)); 1524 xisr->sadb_x_ipsecrequest_reqid = 0; 1525 } 1526 1527 /* allocate new reqid id if reqid is zero. */ 1528 if (xisr->sadb_x_ipsecrequest_reqid == 0) { 1529 u_int32_t reqid; 1530 if ((reqid = key_newreqid()) == 0) { 1531 KEY_FREESP(&newsp); 1532 *error = ENOBUFS; 1533 return NULL; 1534 } 1535 (*p_isr)->saidx.reqid = reqid; 1536 xisr->sadb_x_ipsecrequest_reqid = reqid; 1537 } else { 1538 /* set it for manual keying. */ 1539 (*p_isr)->saidx.reqid = 1540 xisr->sadb_x_ipsecrequest_reqid; 1541 } 1542 break; 1543 1544 default: 1545 ipseclog((LOG_DEBUG, "%s: invalid level=%u\n", 1546 __func__, 1547 xisr->sadb_x_ipsecrequest_level)); 1548 KEY_FREESP(&newsp); 1549 *error = EINVAL; 1550 return NULL; 1551 } 1552 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1553 1554 /* set IP addresses if there */ 1555 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1556 struct sockaddr *paddr; 1557 1558 paddr = (struct sockaddr *)(xisr + 1); 1559 1560 /* validity check */ 1561 if (paddr->sa_len 1562 > sizeof((*p_isr)->saidx.src)) { 1563 ipseclog((LOG_DEBUG, "%s: invalid " 1564 "request address length.\n", 1565 __func__)); 1566 KEY_FREESP(&newsp); 1567 *error = EINVAL; 1568 return NULL; 1569 } 1570 bcopy(paddr, &(*p_isr)->saidx.src, 1571 paddr->sa_len); 1572 1573 paddr = (struct sockaddr *)((caddr_t)paddr 1574 + paddr->sa_len); 1575 1576 /* validity check */ 1577 if (paddr->sa_len 1578 > sizeof((*p_isr)->saidx.dst)) { 1579 ipseclog((LOG_DEBUG, "%s: invalid " 1580 "request address length.\n", 1581 __func__)); 1582 KEY_FREESP(&newsp); 1583 *error = EINVAL; 1584 return NULL; 1585 } 1586 bcopy(paddr, &(*p_isr)->saidx.dst, 1587 paddr->sa_len); 1588 } 1589 1590 (*p_isr)->sp = newsp; 1591 1592 /* initialization for the next. */ 1593 p_isr = &(*p_isr)->next; 1594 tlen -= xisr->sadb_x_ipsecrequest_len; 1595 1596 /* validity check */ 1597 if (tlen < 0) { 1598 ipseclog((LOG_DEBUG, "%s: becoming tlen < 0.\n", 1599 __func__)); 1600 KEY_FREESP(&newsp); 1601 *error = EINVAL; 1602 return NULL; 1603 } 1604 1605 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr 1606 + xisr->sadb_x_ipsecrequest_len); 1607 } 1608 } 1609 break; 1610 default: 1611 ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__)); 1612 KEY_FREESP(&newsp); 1613 *error = EINVAL; 1614 return NULL; 1615 } 1616 1617 *error = 0; 1618 return newsp; 1619 } 1620 1621 static u_int32_t 1622 key_newreqid() 1623 { 1624 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1625 1626 auto_reqid = (auto_reqid == ~0 1627 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1628 1629 /* XXX should be unique check */ 1630 1631 return auto_reqid; 1632 } 1633 1634 /* 1635 * copy secpolicy struct to sadb_x_policy structure indicated. 1636 */ 1637 struct mbuf * 1638 key_sp2msg(sp) 1639 struct secpolicy *sp; 1640 { 1641 struct sadb_x_policy *xpl; 1642 int tlen; 1643 caddr_t p; 1644 struct mbuf *m; 1645 1646 IPSEC_ASSERT(sp != NULL, ("null policy")); 1647 1648 tlen = key_getspreqmsglen(sp); 1649 1650 m = m_get2(tlen, M_NOWAIT, MT_DATA, 0); 1651 if (m == NULL) 1652 return (NULL); 1653 m_align(m, tlen); 1654 m->m_len = tlen; 1655 xpl = mtod(m, struct sadb_x_policy *); 1656 bzero(xpl, tlen); 1657 1658 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1659 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1660 xpl->sadb_x_policy_type = sp->policy; 1661 xpl->sadb_x_policy_dir = sp->spidx.dir; 1662 xpl->sadb_x_policy_id = sp->id; 1663 p = (caddr_t)xpl + sizeof(*xpl); 1664 1665 /* if is the policy for ipsec ? */ 1666 if (sp->policy == IPSEC_POLICY_IPSEC) { 1667 struct sadb_x_ipsecrequest *xisr; 1668 struct ipsecrequest *isr; 1669 1670 for (isr = sp->req; isr != NULL; isr = isr->next) { 1671 1672 xisr = (struct sadb_x_ipsecrequest *)p; 1673 1674 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1675 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1676 xisr->sadb_x_ipsecrequest_level = isr->level; 1677 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1678 1679 p += sizeof(*xisr); 1680 bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len); 1681 p += isr->saidx.src.sa.sa_len; 1682 bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len); 1683 p += isr->saidx.src.sa.sa_len; 1684 1685 xisr->sadb_x_ipsecrequest_len = 1686 PFKEY_ALIGN8(sizeof(*xisr) 1687 + isr->saidx.src.sa.sa_len 1688 + isr->saidx.dst.sa.sa_len); 1689 } 1690 } 1691 1692 return m; 1693 } 1694 1695 /* m will not be freed nor modified */ 1696 static struct mbuf * 1697 #ifdef __STDC__ 1698 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1699 int ndeep, int nitem, ...) 1700 #else 1701 key_gather_mbuf(m, mhp, ndeep, nitem, va_alist) 1702 struct mbuf *m; 1703 const struct sadb_msghdr *mhp; 1704 int ndeep; 1705 int nitem; 1706 va_dcl 1707 #endif 1708 { 1709 va_list ap; 1710 int idx; 1711 int i; 1712 struct mbuf *result = NULL, *n; 1713 int len; 1714 1715 IPSEC_ASSERT(m != NULL, ("null mbuf")); 1716 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1717 1718 va_start(ap, nitem); 1719 for (i = 0; i < nitem; i++) { 1720 idx = va_arg(ap, int); 1721 if (idx < 0 || idx > SADB_EXT_MAX) 1722 goto fail; 1723 /* don't attempt to pull empty extension */ 1724 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1725 continue; 1726 if (idx != SADB_EXT_RESERVED && 1727 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1728 continue; 1729 1730 if (idx == SADB_EXT_RESERVED) { 1731 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1732 1733 IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len)); 1734 1735 MGETHDR(n, M_NOWAIT, MT_DATA); 1736 if (!n) 1737 goto fail; 1738 n->m_len = len; 1739 n->m_next = NULL; 1740 m_copydata(m, 0, sizeof(struct sadb_msg), 1741 mtod(n, caddr_t)); 1742 } else if (i < ndeep) { 1743 len = mhp->extlen[idx]; 1744 n = m_get2(len, M_NOWAIT, MT_DATA, 0); 1745 if (n == NULL) 1746 goto fail; 1747 m_align(n, len); 1748 n->m_len = len; 1749 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1750 mtod(n, caddr_t)); 1751 } else { 1752 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1753 M_NOWAIT); 1754 } 1755 if (n == NULL) 1756 goto fail; 1757 1758 if (result) 1759 m_cat(result, n); 1760 else 1761 result = n; 1762 } 1763 va_end(ap); 1764 1765 if ((result->m_flags & M_PKTHDR) != 0) { 1766 result->m_pkthdr.len = 0; 1767 for (n = result; n; n = n->m_next) 1768 result->m_pkthdr.len += n->m_len; 1769 } 1770 1771 return result; 1772 1773 fail: 1774 m_freem(result); 1775 va_end(ap); 1776 return NULL; 1777 } 1778 1779 /* 1780 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1781 * add an entry to SP database, when received 1782 * <base, address(SD), (lifetime(H),) policy> 1783 * from the user(?). 1784 * Adding to SP database, 1785 * and send 1786 * <base, address(SD), (lifetime(H),) policy> 1787 * to the socket which was send. 1788 * 1789 * SPDADD set a unique policy entry. 1790 * SPDSETIDX like SPDADD without a part of policy requests. 1791 * SPDUPDATE replace a unique policy entry. 1792 * 1793 * m will always be freed. 1794 */ 1795 static int 1796 key_spdadd(so, m, mhp) 1797 struct socket *so; 1798 struct mbuf *m; 1799 const struct sadb_msghdr *mhp; 1800 { 1801 struct sadb_address *src0, *dst0; 1802 struct sadb_x_policy *xpl0, *xpl; 1803 struct sadb_lifetime *lft = NULL; 1804 struct secpolicyindex spidx; 1805 struct secpolicy *newsp; 1806 int error; 1807 1808 IPSEC_ASSERT(so != NULL, ("null socket")); 1809 IPSEC_ASSERT(m != NULL, ("null mbuf")); 1810 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1811 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 1812 1813 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1814 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1815 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1816 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1817 return key_senderror(so, m, EINVAL); 1818 } 1819 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1820 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1821 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1822 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1823 __func__)); 1824 return key_senderror(so, m, EINVAL); 1825 } 1826 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1827 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1828 < sizeof(struct sadb_lifetime)) { 1829 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1830 __func__)); 1831 return key_senderror(so, m, EINVAL); 1832 } 1833 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1834 } 1835 1836 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1837 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1838 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1839 1840 /* 1841 * Note: do not parse SADB_X_EXT_NAT_T_* here: 1842 * we are processing traffic endpoints. 1843 */ 1844 1845 /* make secindex */ 1846 /* XXX boundary check against sa_len */ 1847 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1848 src0 + 1, 1849 dst0 + 1, 1850 src0->sadb_address_prefixlen, 1851 dst0->sadb_address_prefixlen, 1852 src0->sadb_address_proto, 1853 &spidx); 1854 1855 /* checking the direciton. */ 1856 switch (xpl0->sadb_x_policy_dir) { 1857 case IPSEC_DIR_INBOUND: 1858 case IPSEC_DIR_OUTBOUND: 1859 break; 1860 default: 1861 ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 1862 mhp->msg->sadb_msg_errno = EINVAL; 1863 return 0; 1864 } 1865 1866 /* check policy */ 1867 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1868 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1869 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1870 ipseclog((LOG_DEBUG, "%s: Invalid policy type.\n", __func__)); 1871 return key_senderror(so, m, EINVAL); 1872 } 1873 1874 /* policy requests are mandatory when action is ipsec. */ 1875 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1876 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1877 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1878 ipseclog((LOG_DEBUG, "%s: some policy requests part required\n", 1879 __func__)); 1880 return key_senderror(so, m, EINVAL); 1881 } 1882 1883 /* 1884 * checking there is SP already or not. 1885 * SPDUPDATE doesn't depend on whether there is a SP or not. 1886 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1887 * then error. 1888 */ 1889 newsp = key_getsp(&spidx); 1890 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1891 if (newsp) { 1892 SPTREE_LOCK(); 1893 newsp->state = IPSEC_SPSTATE_DEAD; 1894 SPTREE_UNLOCK(); 1895 KEY_FREESP(&newsp); 1896 } 1897 } else { 1898 if (newsp != NULL) { 1899 KEY_FREESP(&newsp); 1900 ipseclog((LOG_DEBUG, "%s: a SP entry exists already.\n", 1901 __func__)); 1902 return key_senderror(so, m, EEXIST); 1903 } 1904 } 1905 1906 /* allocation new SP entry */ 1907 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1908 return key_senderror(so, m, error); 1909 } 1910 1911 if ((newsp->id = key_getnewspid()) == 0) { 1912 _key_delsp(newsp); 1913 return key_senderror(so, m, ENOBUFS); 1914 } 1915 1916 /* XXX boundary check against sa_len */ 1917 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1918 src0 + 1, 1919 dst0 + 1, 1920 src0->sadb_address_prefixlen, 1921 dst0->sadb_address_prefixlen, 1922 src0->sadb_address_proto, 1923 &newsp->spidx); 1924 1925 /* sanity check on addr pair */ 1926 if (((struct sockaddr *)(src0 + 1))->sa_family != 1927 ((struct sockaddr *)(dst0+ 1))->sa_family) { 1928 _key_delsp(newsp); 1929 return key_senderror(so, m, EINVAL); 1930 } 1931 if (((struct sockaddr *)(src0 + 1))->sa_len != 1932 ((struct sockaddr *)(dst0+ 1))->sa_len) { 1933 _key_delsp(newsp); 1934 return key_senderror(so, m, EINVAL); 1935 } 1936 #if 1 1937 if (newsp->req && newsp->req->saidx.src.sa.sa_family && newsp->req->saidx.dst.sa.sa_family) { 1938 if (newsp->req->saidx.src.sa.sa_family != newsp->req->saidx.dst.sa.sa_family) { 1939 _key_delsp(newsp); 1940 return key_senderror(so, m, EINVAL); 1941 } 1942 } 1943 #endif 1944 1945 newsp->created = time_second; 1946 newsp->lastused = newsp->created; 1947 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1948 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1949 1950 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1951 newsp->state = IPSEC_SPSTATE_ALIVE; 1952 LIST_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1953 1954 /* delete the entry in spacqtree */ 1955 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1956 struct secspacq *spacq = key_getspacq(&spidx); 1957 if (spacq != NULL) { 1958 /* reset counter in order to deletion by timehandler. */ 1959 spacq->created = time_second; 1960 spacq->count = 0; 1961 SPACQ_UNLOCK(); 1962 } 1963 } 1964 1965 { 1966 struct mbuf *n, *mpolicy; 1967 struct sadb_msg *newmsg; 1968 int off; 1969 1970 /* 1971 * Note: do not send SADB_X_EXT_NAT_T_* here: 1972 * we are sending traffic endpoints. 1973 */ 1974 1975 /* create new sadb_msg to reply. */ 1976 if (lft) { 1977 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1978 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1979 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1980 } else { 1981 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1982 SADB_X_EXT_POLICY, 1983 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1984 } 1985 if (!n) 1986 return key_senderror(so, m, ENOBUFS); 1987 1988 if (n->m_len < sizeof(*newmsg)) { 1989 n = m_pullup(n, sizeof(*newmsg)); 1990 if (!n) 1991 return key_senderror(so, m, ENOBUFS); 1992 } 1993 newmsg = mtod(n, struct sadb_msg *); 1994 newmsg->sadb_msg_errno = 0; 1995 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1996 1997 off = 0; 1998 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1999 sizeof(*xpl), &off); 2000 if (mpolicy == NULL) { 2001 /* n is already freed */ 2002 return key_senderror(so, m, ENOBUFS); 2003 } 2004 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off); 2005 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2006 m_freem(n); 2007 return key_senderror(so, m, EINVAL); 2008 } 2009 xpl->sadb_x_policy_id = newsp->id; 2010 2011 m_freem(m); 2012 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2013 } 2014 } 2015 2016 /* 2017 * get new policy id. 2018 * OUT: 2019 * 0: failure. 2020 * others: success. 2021 */ 2022 static u_int32_t 2023 key_getnewspid() 2024 { 2025 u_int32_t newid = 0; 2026 int count = V_key_spi_trycnt; /* XXX */ 2027 struct secpolicy *sp; 2028 2029 /* when requesting to allocate spi ranged */ 2030 while (count--) { 2031 newid = (V_policy_id = (V_policy_id == ~0 ? 1 : V_policy_id + 1)); 2032 2033 if ((sp = key_getspbyid(newid)) == NULL) 2034 break; 2035 2036 KEY_FREESP(&sp); 2037 } 2038 2039 if (count == 0 || newid == 0) { 2040 ipseclog((LOG_DEBUG, "%s: to allocate policy id is failed.\n", 2041 __func__)); 2042 return 0; 2043 } 2044 2045 return newid; 2046 } 2047 2048 /* 2049 * SADB_SPDDELETE processing 2050 * receive 2051 * <base, address(SD), policy(*)> 2052 * from the user(?), and set SADB_SASTATE_DEAD, 2053 * and send, 2054 * <base, address(SD), policy(*)> 2055 * to the ikmpd. 2056 * policy(*) including direction of policy. 2057 * 2058 * m will always be freed. 2059 */ 2060 static int 2061 key_spddelete(so, m, mhp) 2062 struct socket *so; 2063 struct mbuf *m; 2064 const struct sadb_msghdr *mhp; 2065 { 2066 struct sadb_address *src0, *dst0; 2067 struct sadb_x_policy *xpl0; 2068 struct secpolicyindex spidx; 2069 struct secpolicy *sp; 2070 2071 IPSEC_ASSERT(so != NULL, ("null so")); 2072 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2073 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2074 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2075 2076 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2077 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2078 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2079 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2080 __func__)); 2081 return key_senderror(so, m, EINVAL); 2082 } 2083 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2084 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2085 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2086 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2087 __func__)); 2088 return key_senderror(so, m, EINVAL); 2089 } 2090 2091 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2092 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2093 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2094 2095 /* 2096 * Note: do not parse SADB_X_EXT_NAT_T_* here: 2097 * we are processing traffic endpoints. 2098 */ 2099 2100 /* make secindex */ 2101 /* XXX boundary check against sa_len */ 2102 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2103 src0 + 1, 2104 dst0 + 1, 2105 src0->sadb_address_prefixlen, 2106 dst0->sadb_address_prefixlen, 2107 src0->sadb_address_proto, 2108 &spidx); 2109 2110 /* checking the direciton. */ 2111 switch (xpl0->sadb_x_policy_dir) { 2112 case IPSEC_DIR_INBOUND: 2113 case IPSEC_DIR_OUTBOUND: 2114 break; 2115 default: 2116 ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 2117 return key_senderror(so, m, EINVAL); 2118 } 2119 2120 /* Is there SP in SPD ? */ 2121 if ((sp = key_getsp(&spidx)) == NULL) { 2122 ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__)); 2123 return key_senderror(so, m, EINVAL); 2124 } 2125 2126 /* save policy id to buffer to be returned. */ 2127 xpl0->sadb_x_policy_id = sp->id; 2128 2129 SPTREE_LOCK(); 2130 sp->state = IPSEC_SPSTATE_DEAD; 2131 SPTREE_UNLOCK(); 2132 KEY_FREESP(&sp); 2133 2134 { 2135 struct mbuf *n; 2136 struct sadb_msg *newmsg; 2137 2138 /* 2139 * Note: do not send SADB_X_EXT_NAT_T_* here: 2140 * we are sending traffic endpoints. 2141 */ 2142 2143 /* create new sadb_msg to reply. */ 2144 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2145 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2146 if (!n) 2147 return key_senderror(so, m, ENOBUFS); 2148 2149 newmsg = mtod(n, struct sadb_msg *); 2150 newmsg->sadb_msg_errno = 0; 2151 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2152 2153 m_freem(m); 2154 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2155 } 2156 } 2157 2158 /* 2159 * SADB_SPDDELETE2 processing 2160 * receive 2161 * <base, policy(*)> 2162 * from the user(?), and set SADB_SASTATE_DEAD, 2163 * and send, 2164 * <base, policy(*)> 2165 * to the ikmpd. 2166 * policy(*) including direction of policy. 2167 * 2168 * m will always be freed. 2169 */ 2170 static int 2171 key_spddelete2(so, m, mhp) 2172 struct socket *so; 2173 struct mbuf *m; 2174 const struct sadb_msghdr *mhp; 2175 { 2176 u_int32_t id; 2177 struct secpolicy *sp; 2178 2179 IPSEC_ASSERT(so != NULL, ("null socket")); 2180 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2181 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2182 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2183 2184 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2185 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2186 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", __func__)); 2187 return key_senderror(so, m, EINVAL); 2188 } 2189 2190 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2191 2192 /* Is there SP in SPD ? */ 2193 if ((sp = key_getspbyid(id)) == NULL) { 2194 ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2195 return key_senderror(so, m, EINVAL); 2196 } 2197 2198 SPTREE_LOCK(); 2199 sp->state = IPSEC_SPSTATE_DEAD; 2200 SPTREE_UNLOCK(); 2201 KEY_FREESP(&sp); 2202 2203 { 2204 struct mbuf *n, *nn; 2205 struct sadb_msg *newmsg; 2206 int off, len; 2207 2208 /* create new sadb_msg to reply. */ 2209 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2210 2211 MGETHDR(n, M_NOWAIT, MT_DATA); 2212 if (n && len > MHLEN) { 2213 MCLGET(n, M_NOWAIT); 2214 if ((n->m_flags & M_EXT) == 0) { 2215 m_freem(n); 2216 n = NULL; 2217 } 2218 } 2219 if (!n) 2220 return key_senderror(so, m, ENOBUFS); 2221 2222 n->m_len = len; 2223 n->m_next = NULL; 2224 off = 0; 2225 2226 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 2227 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2228 2229 IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)", 2230 off, len)); 2231 2232 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2233 mhp->extlen[SADB_X_EXT_POLICY], M_NOWAIT); 2234 if (!n->m_next) { 2235 m_freem(n); 2236 return key_senderror(so, m, ENOBUFS); 2237 } 2238 2239 n->m_pkthdr.len = 0; 2240 for (nn = n; nn; nn = nn->m_next) 2241 n->m_pkthdr.len += nn->m_len; 2242 2243 newmsg = mtod(n, struct sadb_msg *); 2244 newmsg->sadb_msg_errno = 0; 2245 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2246 2247 m_freem(m); 2248 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2249 } 2250 } 2251 2252 /* 2253 * SADB_X_GET processing 2254 * receive 2255 * <base, policy(*)> 2256 * from the user(?), 2257 * and send, 2258 * <base, address(SD), policy> 2259 * to the ikmpd. 2260 * policy(*) including direction of policy. 2261 * 2262 * m will always be freed. 2263 */ 2264 static int 2265 key_spdget(so, m, mhp) 2266 struct socket *so; 2267 struct mbuf *m; 2268 const struct sadb_msghdr *mhp; 2269 { 2270 u_int32_t id; 2271 struct secpolicy *sp; 2272 struct mbuf *n; 2273 2274 IPSEC_ASSERT(so != NULL, ("null socket")); 2275 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2276 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2277 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2278 2279 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2280 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2281 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2282 __func__)); 2283 return key_senderror(so, m, EINVAL); 2284 } 2285 2286 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2287 2288 /* Is there SP in SPD ? */ 2289 if ((sp = key_getspbyid(id)) == NULL) { 2290 ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2291 return key_senderror(so, m, ENOENT); 2292 } 2293 2294 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); 2295 KEY_FREESP(&sp); 2296 if (n != NULL) { 2297 m_freem(m); 2298 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2299 } else 2300 return key_senderror(so, m, ENOBUFS); 2301 } 2302 2303 /* 2304 * SADB_X_SPDACQUIRE processing. 2305 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2306 * send 2307 * <base, policy(*)> 2308 * to KMD, and expect to receive 2309 * <base> with SADB_X_SPDACQUIRE if error occured, 2310 * or 2311 * <base, policy> 2312 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2313 * policy(*) is without policy requests. 2314 * 2315 * 0 : succeed 2316 * others: error number 2317 */ 2318 int 2319 key_spdacquire(sp) 2320 struct secpolicy *sp; 2321 { 2322 struct mbuf *result = NULL, *m; 2323 struct secspacq *newspacq; 2324 2325 IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2326 IPSEC_ASSERT(sp->req == NULL, ("policy exists")); 2327 IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC, 2328 ("policy not IPSEC %u", sp->policy)); 2329 2330 /* Get an entry to check whether sent message or not. */ 2331 newspacq = key_getspacq(&sp->spidx); 2332 if (newspacq != NULL) { 2333 if (V_key_blockacq_count < newspacq->count) { 2334 /* reset counter and do send message. */ 2335 newspacq->count = 0; 2336 } else { 2337 /* increment counter and do nothing. */ 2338 newspacq->count++; 2339 return 0; 2340 } 2341 SPACQ_UNLOCK(); 2342 } else { 2343 /* make new entry for blocking to send SADB_ACQUIRE. */ 2344 newspacq = key_newspacq(&sp->spidx); 2345 if (newspacq == NULL) 2346 return ENOBUFS; 2347 } 2348 2349 /* create new sadb_msg to reply. */ 2350 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2351 if (!m) 2352 return ENOBUFS; 2353 2354 result = m; 2355 2356 result->m_pkthdr.len = 0; 2357 for (m = result; m; m = m->m_next) 2358 result->m_pkthdr.len += m->m_len; 2359 2360 mtod(result, struct sadb_msg *)->sadb_msg_len = 2361 PFKEY_UNIT64(result->m_pkthdr.len); 2362 2363 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2364 } 2365 2366 /* 2367 * SADB_SPDFLUSH processing 2368 * receive 2369 * <base> 2370 * from the user, and free all entries in secpctree. 2371 * and send, 2372 * <base> 2373 * to the user. 2374 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2375 * 2376 * m will always be freed. 2377 */ 2378 static int 2379 key_spdflush(so, m, mhp) 2380 struct socket *so; 2381 struct mbuf *m; 2382 const struct sadb_msghdr *mhp; 2383 { 2384 struct sadb_msg *newmsg; 2385 struct secpolicy *sp; 2386 u_int dir; 2387 2388 IPSEC_ASSERT(so != NULL, ("null socket")); 2389 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2390 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2391 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2392 2393 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2394 return key_senderror(so, m, EINVAL); 2395 2396 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2397 SPTREE_LOCK(); 2398 LIST_FOREACH(sp, &V_sptree[dir], chain) 2399 sp->state = IPSEC_SPSTATE_DEAD; 2400 SPTREE_UNLOCK(); 2401 } 2402 2403 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2404 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2405 return key_senderror(so, m, ENOBUFS); 2406 } 2407 2408 if (m->m_next) 2409 m_freem(m->m_next); 2410 m->m_next = NULL; 2411 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2412 newmsg = mtod(m, struct sadb_msg *); 2413 newmsg->sadb_msg_errno = 0; 2414 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2415 2416 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2417 } 2418 2419 /* 2420 * SADB_SPDDUMP processing 2421 * receive 2422 * <base> 2423 * from the user, and dump all SP leaves 2424 * and send, 2425 * <base> ..... 2426 * to the ikmpd. 2427 * 2428 * m will always be freed. 2429 */ 2430 static int 2431 key_spddump(so, m, mhp) 2432 struct socket *so; 2433 struct mbuf *m; 2434 const struct sadb_msghdr *mhp; 2435 { 2436 struct secpolicy *sp; 2437 int cnt; 2438 u_int dir; 2439 struct mbuf *n; 2440 2441 IPSEC_ASSERT(so != NULL, ("null socket")); 2442 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2443 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2444 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2445 2446 /* search SPD entry and get buffer size. */ 2447 cnt = 0; 2448 SPTREE_LOCK(); 2449 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2450 LIST_FOREACH(sp, &V_sptree[dir], chain) { 2451 cnt++; 2452 } 2453 } 2454 2455 if (cnt == 0) { 2456 SPTREE_UNLOCK(); 2457 return key_senderror(so, m, ENOENT); 2458 } 2459 2460 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2461 LIST_FOREACH(sp, &V_sptree[dir], chain) { 2462 --cnt; 2463 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, 2464 mhp->msg->sadb_msg_pid); 2465 2466 if (n) 2467 key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2468 } 2469 } 2470 2471 SPTREE_UNLOCK(); 2472 m_freem(m); 2473 return 0; 2474 } 2475 2476 static struct mbuf * 2477 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, u_int32_t pid) 2478 { 2479 struct mbuf *result = NULL, *m; 2480 struct seclifetime lt; 2481 2482 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2483 if (!m) 2484 goto fail; 2485 result = m; 2486 2487 /* 2488 * Note: do not send SADB_X_EXT_NAT_T_* here: 2489 * we are sending traffic endpoints. 2490 */ 2491 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2492 &sp->spidx.src.sa, sp->spidx.prefs, 2493 sp->spidx.ul_proto); 2494 if (!m) 2495 goto fail; 2496 m_cat(result, m); 2497 2498 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2499 &sp->spidx.dst.sa, sp->spidx.prefd, 2500 sp->spidx.ul_proto); 2501 if (!m) 2502 goto fail; 2503 m_cat(result, m); 2504 2505 m = key_sp2msg(sp); 2506 if (!m) 2507 goto fail; 2508 m_cat(result, m); 2509 2510 if(sp->lifetime){ 2511 lt.addtime=sp->created; 2512 lt.usetime= sp->lastused; 2513 m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT); 2514 if (!m) 2515 goto fail; 2516 m_cat(result, m); 2517 2518 lt.addtime=sp->lifetime; 2519 lt.usetime= sp->validtime; 2520 m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD); 2521 if (!m) 2522 goto fail; 2523 m_cat(result, m); 2524 } 2525 2526 if ((result->m_flags & M_PKTHDR) == 0) 2527 goto fail; 2528 2529 if (result->m_len < sizeof(struct sadb_msg)) { 2530 result = m_pullup(result, sizeof(struct sadb_msg)); 2531 if (result == NULL) 2532 goto fail; 2533 } 2534 2535 result->m_pkthdr.len = 0; 2536 for (m = result; m; m = m->m_next) 2537 result->m_pkthdr.len += m->m_len; 2538 2539 mtod(result, struct sadb_msg *)->sadb_msg_len = 2540 PFKEY_UNIT64(result->m_pkthdr.len); 2541 2542 return result; 2543 2544 fail: 2545 m_freem(result); 2546 return NULL; 2547 } 2548 2549 /* 2550 * get PFKEY message length for security policy and request. 2551 */ 2552 static u_int 2553 key_getspreqmsglen(sp) 2554 struct secpolicy *sp; 2555 { 2556 u_int tlen; 2557 2558 tlen = sizeof(struct sadb_x_policy); 2559 2560 /* if is the policy for ipsec ? */ 2561 if (sp->policy != IPSEC_POLICY_IPSEC) 2562 return tlen; 2563 2564 /* get length of ipsec requests */ 2565 { 2566 struct ipsecrequest *isr; 2567 int len; 2568 2569 for (isr = sp->req; isr != NULL; isr = isr->next) { 2570 len = sizeof(struct sadb_x_ipsecrequest) 2571 + isr->saidx.src.sa.sa_len 2572 + isr->saidx.dst.sa.sa_len; 2573 2574 tlen += PFKEY_ALIGN8(len); 2575 } 2576 } 2577 2578 return tlen; 2579 } 2580 2581 /* 2582 * SADB_SPDEXPIRE processing 2583 * send 2584 * <base, address(SD), lifetime(CH), policy> 2585 * to KMD by PF_KEY. 2586 * 2587 * OUT: 0 : succeed 2588 * others : error number 2589 */ 2590 static int 2591 key_spdexpire(sp) 2592 struct secpolicy *sp; 2593 { 2594 struct mbuf *result = NULL, *m; 2595 int len; 2596 int error = -1; 2597 struct sadb_lifetime *lt; 2598 2599 /* XXX: Why do we lock ? */ 2600 2601 IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2602 2603 /* set msg header */ 2604 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2605 if (!m) { 2606 error = ENOBUFS; 2607 goto fail; 2608 } 2609 result = m; 2610 2611 /* create lifetime extension (current and hard) */ 2612 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2613 m = m_get2(len, M_NOWAIT, MT_DATA, 0); 2614 if (m == NULL) { 2615 error = ENOBUFS; 2616 goto fail; 2617 } 2618 m_align(m, len); 2619 m->m_len = len; 2620 bzero(mtod(m, caddr_t), len); 2621 lt = mtod(m, struct sadb_lifetime *); 2622 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2623 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2624 lt->sadb_lifetime_allocations = 0; 2625 lt->sadb_lifetime_bytes = 0; 2626 lt->sadb_lifetime_addtime = sp->created; 2627 lt->sadb_lifetime_usetime = sp->lastused; 2628 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 2629 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2630 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2631 lt->sadb_lifetime_allocations = 0; 2632 lt->sadb_lifetime_bytes = 0; 2633 lt->sadb_lifetime_addtime = sp->lifetime; 2634 lt->sadb_lifetime_usetime = sp->validtime; 2635 m_cat(result, m); 2636 2637 /* 2638 * Note: do not send SADB_X_EXT_NAT_T_* here: 2639 * we are sending traffic endpoints. 2640 */ 2641 2642 /* set sadb_address for source */ 2643 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2644 &sp->spidx.src.sa, 2645 sp->spidx.prefs, sp->spidx.ul_proto); 2646 if (!m) { 2647 error = ENOBUFS; 2648 goto fail; 2649 } 2650 m_cat(result, m); 2651 2652 /* set sadb_address for destination */ 2653 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2654 &sp->spidx.dst.sa, 2655 sp->spidx.prefd, sp->spidx.ul_proto); 2656 if (!m) { 2657 error = ENOBUFS; 2658 goto fail; 2659 } 2660 m_cat(result, m); 2661 2662 /* set secpolicy */ 2663 m = key_sp2msg(sp); 2664 if (!m) { 2665 error = ENOBUFS; 2666 goto fail; 2667 } 2668 m_cat(result, m); 2669 2670 if ((result->m_flags & M_PKTHDR) == 0) { 2671 error = EINVAL; 2672 goto fail; 2673 } 2674 2675 if (result->m_len < sizeof(struct sadb_msg)) { 2676 result = m_pullup(result, sizeof(struct sadb_msg)); 2677 if (result == NULL) { 2678 error = ENOBUFS; 2679 goto fail; 2680 } 2681 } 2682 2683 result->m_pkthdr.len = 0; 2684 for (m = result; m; m = m->m_next) 2685 result->m_pkthdr.len += m->m_len; 2686 2687 mtod(result, struct sadb_msg *)->sadb_msg_len = 2688 PFKEY_UNIT64(result->m_pkthdr.len); 2689 2690 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2691 2692 fail: 2693 if (result) 2694 m_freem(result); 2695 return error; 2696 } 2697 2698 /* %%% SAD management */ 2699 /* 2700 * allocating a memory for new SA head, and copy from the values of mhp. 2701 * OUT: NULL : failure due to the lack of memory. 2702 * others : pointer to new SA head. 2703 */ 2704 static struct secashead * 2705 key_newsah(saidx) 2706 struct secasindex *saidx; 2707 { 2708 struct secashead *newsah; 2709 2710 IPSEC_ASSERT(saidx != NULL, ("null saidx")); 2711 2712 newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO); 2713 if (newsah != NULL) { 2714 int i; 2715 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2716 LIST_INIT(&newsah->savtree[i]); 2717 newsah->saidx = *saidx; 2718 2719 /* add to saidxtree */ 2720 newsah->state = SADB_SASTATE_MATURE; 2721 2722 SAHTREE_LOCK(); 2723 LIST_INSERT_HEAD(&V_sahtree, newsah, chain); 2724 SAHTREE_UNLOCK(); 2725 } 2726 return(newsah); 2727 } 2728 2729 /* 2730 * delete SA index and all SA registerd. 2731 */ 2732 static void 2733 key_delsah(sah) 2734 struct secashead *sah; 2735 { 2736 struct secasvar *sav, *nextsav; 2737 u_int stateidx; 2738 int zombie = 0; 2739 2740 IPSEC_ASSERT(sah != NULL, ("NULL sah")); 2741 SAHTREE_LOCK_ASSERT(); 2742 2743 /* searching all SA registerd in the secindex. */ 2744 for (stateidx = 0; 2745 stateidx < _ARRAYLEN(saorder_state_any); 2746 stateidx++) { 2747 u_int state = saorder_state_any[stateidx]; 2748 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2749 if (sav->refcnt == 0) { 2750 /* sanity check */ 2751 KEY_CHKSASTATE(state, sav->state, __func__); 2752 /* 2753 * do NOT call KEY_FREESAV here: 2754 * it will only delete the sav if refcnt == 1, 2755 * where we already know that refcnt == 0 2756 */ 2757 key_delsav(sav); 2758 } else { 2759 /* give up to delete this sa */ 2760 zombie++; 2761 } 2762 } 2763 } 2764 if (!zombie) { /* delete only if there are savs */ 2765 /* remove from tree of SA index */ 2766 if (__LIST_CHAINED(sah)) 2767 LIST_REMOVE(sah, chain); 2768 if (sah->route_cache.sa_route.ro_rt) { 2769 RTFREE(sah->route_cache.sa_route.ro_rt); 2770 sah->route_cache.sa_route.ro_rt = (struct rtentry *)NULL; 2771 } 2772 free(sah, M_IPSEC_SAH); 2773 } 2774 } 2775 2776 /* 2777 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2778 * and copy the values of mhp into new buffer. 2779 * When SAD message type is GETSPI: 2780 * to set sequence number from acq_seq++, 2781 * to set zero to SPI. 2782 * not to call key_setsava(). 2783 * OUT: NULL : fail 2784 * others : pointer to new secasvar. 2785 * 2786 * does not modify mbuf. does not free mbuf on error. 2787 */ 2788 static struct secasvar * 2789 key_newsav(m, mhp, sah, errp, where, tag) 2790 struct mbuf *m; 2791 const struct sadb_msghdr *mhp; 2792 struct secashead *sah; 2793 int *errp; 2794 const char* where; 2795 int tag; 2796 { 2797 struct secasvar *newsav; 2798 const struct sadb_sa *xsa; 2799 2800 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2801 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2802 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2803 IPSEC_ASSERT(sah != NULL, ("null secashead")); 2804 2805 newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO); 2806 if (newsav == NULL) { 2807 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2808 *errp = ENOBUFS; 2809 goto done; 2810 } 2811 2812 switch (mhp->msg->sadb_msg_type) { 2813 case SADB_GETSPI: 2814 newsav->spi = 0; 2815 2816 #ifdef IPSEC_DOSEQCHECK 2817 /* sync sequence number */ 2818 if (mhp->msg->sadb_msg_seq == 0) 2819 newsav->seq = 2820 (V_acq_seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq)); 2821 else 2822 #endif 2823 newsav->seq = mhp->msg->sadb_msg_seq; 2824 break; 2825 2826 case SADB_ADD: 2827 /* sanity check */ 2828 if (mhp->ext[SADB_EXT_SA] == NULL) { 2829 free(newsav, M_IPSEC_SA); 2830 newsav = NULL; 2831 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2832 __func__)); 2833 *errp = EINVAL; 2834 goto done; 2835 } 2836 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2837 newsav->spi = xsa->sadb_sa_spi; 2838 newsav->seq = mhp->msg->sadb_msg_seq; 2839 break; 2840 default: 2841 free(newsav, M_IPSEC_SA); 2842 newsav = NULL; 2843 *errp = EINVAL; 2844 goto done; 2845 } 2846 2847 2848 /* copy sav values */ 2849 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2850 *errp = key_setsaval(newsav, m, mhp); 2851 if (*errp) { 2852 free(newsav, M_IPSEC_SA); 2853 newsav = NULL; 2854 goto done; 2855 } 2856 } 2857 2858 SECASVAR_LOCK_INIT(newsav); 2859 2860 /* reset created */ 2861 newsav->created = time_second; 2862 newsav->pid = mhp->msg->sadb_msg_pid; 2863 2864 /* add to satree */ 2865 newsav->sah = sah; 2866 sa_initref(newsav); 2867 newsav->state = SADB_SASTATE_LARVAL; 2868 2869 SAHTREE_LOCK(); 2870 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2871 secasvar, chain); 2872 SAHTREE_UNLOCK(); 2873 done: 2874 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2875 printf("DP %s from %s:%u return SP:%p\n", __func__, 2876 where, tag, newsav)); 2877 2878 return newsav; 2879 } 2880 2881 /* 2882 * free() SA variable entry. 2883 */ 2884 static void 2885 key_cleansav(struct secasvar *sav) 2886 { 2887 /* 2888 * Cleanup xform state. Note that zeroize'ing causes the 2889 * keys to be cleared; otherwise we must do it ourself. 2890 */ 2891 if (sav->tdb_xform != NULL) { 2892 sav->tdb_xform->xf_zeroize(sav); 2893 sav->tdb_xform = NULL; 2894 } else { 2895 KASSERT(sav->iv == NULL, ("iv but no xform")); 2896 if (sav->key_auth != NULL) 2897 bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth)); 2898 if (sav->key_enc != NULL) 2899 bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc)); 2900 } 2901 if (sav->key_auth != NULL) { 2902 if (sav->key_auth->key_data != NULL) 2903 free(sav->key_auth->key_data, M_IPSEC_MISC); 2904 free(sav->key_auth, M_IPSEC_MISC); 2905 sav->key_auth = NULL; 2906 } 2907 if (sav->key_enc != NULL) { 2908 if (sav->key_enc->key_data != NULL) 2909 free(sav->key_enc->key_data, M_IPSEC_MISC); 2910 free(sav->key_enc, M_IPSEC_MISC); 2911 sav->key_enc = NULL; 2912 } 2913 if (sav->sched) { 2914 bzero(sav->sched, sav->schedlen); 2915 free(sav->sched, M_IPSEC_MISC); 2916 sav->sched = NULL; 2917 } 2918 if (sav->replay != NULL) { 2919 free(sav->replay, M_IPSEC_MISC); 2920 sav->replay = NULL; 2921 } 2922 if (sav->lft_c != NULL) { 2923 free(sav->lft_c, M_IPSEC_MISC); 2924 sav->lft_c = NULL; 2925 } 2926 if (sav->lft_h != NULL) { 2927 free(sav->lft_h, M_IPSEC_MISC); 2928 sav->lft_h = NULL; 2929 } 2930 if (sav->lft_s != NULL) { 2931 free(sav->lft_s, M_IPSEC_MISC); 2932 sav->lft_s = NULL; 2933 } 2934 } 2935 2936 /* 2937 * free() SA variable entry. 2938 */ 2939 static void 2940 key_delsav(sav) 2941 struct secasvar *sav; 2942 { 2943 IPSEC_ASSERT(sav != NULL, ("null sav")); 2944 IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt)); 2945 2946 /* remove from SA header */ 2947 if (__LIST_CHAINED(sav)) 2948 LIST_REMOVE(sav, chain); 2949 key_cleansav(sav); 2950 SECASVAR_LOCK_DESTROY(sav); 2951 free(sav, M_IPSEC_SA); 2952 } 2953 2954 /* 2955 * search SAD. 2956 * OUT: 2957 * NULL : not found 2958 * others : found, pointer to a SA. 2959 */ 2960 static struct secashead * 2961 key_getsah(saidx) 2962 struct secasindex *saidx; 2963 { 2964 struct secashead *sah; 2965 2966 SAHTREE_LOCK(); 2967 LIST_FOREACH(sah, &V_sahtree, chain) { 2968 if (sah->state == SADB_SASTATE_DEAD) 2969 continue; 2970 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 2971 break; 2972 } 2973 SAHTREE_UNLOCK(); 2974 2975 return sah; 2976 } 2977 2978 /* 2979 * check not to be duplicated SPI. 2980 * NOTE: this function is too slow due to searching all SAD. 2981 * OUT: 2982 * NULL : not found 2983 * others : found, pointer to a SA. 2984 */ 2985 static struct secasvar * 2986 key_checkspidup(saidx, spi) 2987 struct secasindex *saidx; 2988 u_int32_t spi; 2989 { 2990 struct secashead *sah; 2991 struct secasvar *sav; 2992 2993 /* check address family */ 2994 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 2995 ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 2996 __func__)); 2997 return NULL; 2998 } 2999 3000 sav = NULL; 3001 /* check all SAD */ 3002 SAHTREE_LOCK(); 3003 LIST_FOREACH(sah, &V_sahtree, chain) { 3004 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3005 continue; 3006 sav = key_getsavbyspi(sah, spi); 3007 if (sav != NULL) 3008 break; 3009 } 3010 SAHTREE_UNLOCK(); 3011 3012 return sav; 3013 } 3014 3015 /* 3016 * search SAD litmited alive SA, protocol, SPI. 3017 * OUT: 3018 * NULL : not found 3019 * others : found, pointer to a SA. 3020 */ 3021 static struct secasvar * 3022 key_getsavbyspi(sah, spi) 3023 struct secashead *sah; 3024 u_int32_t spi; 3025 { 3026 struct secasvar *sav; 3027 u_int stateidx, state; 3028 3029 sav = NULL; 3030 SAHTREE_LOCK_ASSERT(); 3031 /* search all status */ 3032 for (stateidx = 0; 3033 stateidx < _ARRAYLEN(saorder_state_alive); 3034 stateidx++) { 3035 3036 state = saorder_state_alive[stateidx]; 3037 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3038 3039 /* sanity check */ 3040 if (sav->state != state) { 3041 ipseclog((LOG_DEBUG, "%s: " 3042 "invalid sav->state (queue: %d SA: %d)\n", 3043 __func__, state, sav->state)); 3044 continue; 3045 } 3046 3047 if (sav->spi == spi) 3048 return sav; 3049 } 3050 } 3051 3052 return NULL; 3053 } 3054 3055 /* 3056 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3057 * You must update these if need. 3058 * OUT: 0: success. 3059 * !0: failure. 3060 * 3061 * does not modify mbuf. does not free mbuf on error. 3062 */ 3063 static int 3064 key_setsaval(sav, m, mhp) 3065 struct secasvar *sav; 3066 struct mbuf *m; 3067 const struct sadb_msghdr *mhp; 3068 { 3069 int error = 0; 3070 3071 IPSEC_ASSERT(m != NULL, ("null mbuf")); 3072 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 3073 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 3074 3075 /* initialization */ 3076 sav->replay = NULL; 3077 sav->key_auth = NULL; 3078 sav->key_enc = NULL; 3079 sav->sched = NULL; 3080 sav->schedlen = 0; 3081 sav->iv = NULL; 3082 sav->lft_c = NULL; 3083 sav->lft_h = NULL; 3084 sav->lft_s = NULL; 3085 sav->tdb_xform = NULL; /* transform */ 3086 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3087 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3088 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3089 /* Initialize even if NAT-T not compiled in: */ 3090 sav->natt_type = 0; 3091 sav->natt_esp_frag_len = 0; 3092 3093 /* SA */ 3094 if (mhp->ext[SADB_EXT_SA] != NULL) { 3095 const struct sadb_sa *sa0; 3096 3097 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3098 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3099 error = EINVAL; 3100 goto fail; 3101 } 3102 3103 sav->alg_auth = sa0->sadb_sa_auth; 3104 sav->alg_enc = sa0->sadb_sa_encrypt; 3105 sav->flags = sa0->sadb_sa_flags; 3106 3107 /* replay window */ 3108 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3109 sav->replay = (struct secreplay *) 3110 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO); 3111 if (sav->replay == NULL) { 3112 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3113 __func__)); 3114 error = ENOBUFS; 3115 goto fail; 3116 } 3117 if (sa0->sadb_sa_replay != 0) 3118 sav->replay->bitmap = (caddr_t)(sav->replay+1); 3119 sav->replay->wsize = sa0->sadb_sa_replay; 3120 } 3121 } 3122 3123 /* Authentication keys */ 3124 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3125 const struct sadb_key *key0; 3126 int len; 3127 3128 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3129 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3130 3131 error = 0; 3132 if (len < sizeof(*key0)) { 3133 error = EINVAL; 3134 goto fail; 3135 } 3136 switch (mhp->msg->sadb_msg_satype) { 3137 case SADB_SATYPE_AH: 3138 case SADB_SATYPE_ESP: 3139 case SADB_X_SATYPE_TCPSIGNATURE: 3140 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3141 sav->alg_auth != SADB_X_AALG_NULL) 3142 error = EINVAL; 3143 break; 3144 case SADB_X_SATYPE_IPCOMP: 3145 default: 3146 error = EINVAL; 3147 break; 3148 } 3149 if (error) { 3150 ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n", 3151 __func__)); 3152 goto fail; 3153 } 3154 3155 sav->key_auth = (struct seckey *)key_dup_keymsg(key0, len, 3156 M_IPSEC_MISC); 3157 if (sav->key_auth == NULL ) { 3158 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3159 __func__)); 3160 error = ENOBUFS; 3161 goto fail; 3162 } 3163 } 3164 3165 /* Encryption key */ 3166 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3167 const struct sadb_key *key0; 3168 int len; 3169 3170 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3171 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3172 3173 error = 0; 3174 if (len < sizeof(*key0)) { 3175 error = EINVAL; 3176 goto fail; 3177 } 3178 switch (mhp->msg->sadb_msg_satype) { 3179 case SADB_SATYPE_ESP: 3180 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3181 sav->alg_enc != SADB_EALG_NULL) { 3182 error = EINVAL; 3183 break; 3184 } 3185 sav->key_enc = (struct seckey *)key_dup_keymsg(key0, 3186 len, 3187 M_IPSEC_MISC); 3188 if (sav->key_enc == NULL) { 3189 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3190 __func__)); 3191 error = ENOBUFS; 3192 goto fail; 3193 } 3194 break; 3195 case SADB_X_SATYPE_IPCOMP: 3196 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3197 error = EINVAL; 3198 sav->key_enc = NULL; /*just in case*/ 3199 break; 3200 case SADB_SATYPE_AH: 3201 case SADB_X_SATYPE_TCPSIGNATURE: 3202 default: 3203 error = EINVAL; 3204 break; 3205 } 3206 if (error) { 3207 ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n", 3208 __func__)); 3209 goto fail; 3210 } 3211 } 3212 3213 /* set iv */ 3214 sav->ivlen = 0; 3215 3216 switch (mhp->msg->sadb_msg_satype) { 3217 case SADB_SATYPE_AH: 3218 error = xform_init(sav, XF_AH); 3219 break; 3220 case SADB_SATYPE_ESP: 3221 error = xform_init(sav, XF_ESP); 3222 break; 3223 case SADB_X_SATYPE_IPCOMP: 3224 error = xform_init(sav, XF_IPCOMP); 3225 break; 3226 case SADB_X_SATYPE_TCPSIGNATURE: 3227 error = xform_init(sav, XF_TCPSIGNATURE); 3228 break; 3229 } 3230 if (error) { 3231 ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n", 3232 __func__, mhp->msg->sadb_msg_satype)); 3233 goto fail; 3234 } 3235 3236 /* reset created */ 3237 sav->created = time_second; 3238 3239 /* make lifetime for CURRENT */ 3240 sav->lft_c = malloc(sizeof(struct seclifetime), M_IPSEC_MISC, M_NOWAIT); 3241 if (sav->lft_c == NULL) { 3242 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3243 error = ENOBUFS; 3244 goto fail; 3245 } 3246 3247 sav->lft_c->allocations = 0; 3248 sav->lft_c->bytes = 0; 3249 sav->lft_c->addtime = time_second; 3250 sav->lft_c->usetime = 0; 3251 3252 /* lifetimes for HARD and SOFT */ 3253 { 3254 const struct sadb_lifetime *lft0; 3255 3256 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3257 if (lft0 != NULL) { 3258 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3259 error = EINVAL; 3260 goto fail; 3261 } 3262 sav->lft_h = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3263 if (sav->lft_h == NULL) { 3264 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3265 error = ENOBUFS; 3266 goto fail; 3267 } 3268 /* to be initialize ? */ 3269 } 3270 3271 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3272 if (lft0 != NULL) { 3273 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3274 error = EINVAL; 3275 goto fail; 3276 } 3277 sav->lft_s = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3278 if (sav->lft_s == NULL) { 3279 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3280 error = ENOBUFS; 3281 goto fail; 3282 } 3283 /* to be initialize ? */ 3284 } 3285 } 3286 3287 return 0; 3288 3289 fail: 3290 /* initialization */ 3291 key_cleansav(sav); 3292 3293 return error; 3294 } 3295 3296 /* 3297 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3298 * OUT: 0: valid 3299 * other: errno 3300 */ 3301 static int 3302 key_mature(struct secasvar *sav) 3303 { 3304 int error; 3305 3306 /* check SPI value */ 3307 switch (sav->sah->saidx.proto) { 3308 case IPPROTO_ESP: 3309 case IPPROTO_AH: 3310 /* 3311 * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values 3312 * 1-255 reserved by IANA for future use, 3313 * 0 for implementation specific, local use. 3314 */ 3315 if (ntohl(sav->spi) <= 255) { 3316 ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n", 3317 __func__, (u_int32_t)ntohl(sav->spi))); 3318 return EINVAL; 3319 } 3320 break; 3321 } 3322 3323 /* check satype */ 3324 switch (sav->sah->saidx.proto) { 3325 case IPPROTO_ESP: 3326 /* check flags */ 3327 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3328 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3329 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3330 "given to old-esp.\n", __func__)); 3331 return EINVAL; 3332 } 3333 error = xform_init(sav, XF_ESP); 3334 break; 3335 case IPPROTO_AH: 3336 /* check flags */ 3337 if (sav->flags & SADB_X_EXT_DERIV) { 3338 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3339 "given to AH SA.\n", __func__)); 3340 return EINVAL; 3341 } 3342 if (sav->alg_enc != SADB_EALG_NONE) { 3343 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3344 "mismated.\n", __func__)); 3345 return(EINVAL); 3346 } 3347 error = xform_init(sav, XF_AH); 3348 break; 3349 case IPPROTO_IPCOMP: 3350 if (sav->alg_auth != SADB_AALG_NONE) { 3351 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3352 "mismated.\n", __func__)); 3353 return(EINVAL); 3354 } 3355 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3356 && ntohl(sav->spi) >= 0x10000) { 3357 ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n", 3358 __func__)); 3359 return(EINVAL); 3360 } 3361 error = xform_init(sav, XF_IPCOMP); 3362 break; 3363 case IPPROTO_TCP: 3364 if (sav->alg_enc != SADB_EALG_NONE) { 3365 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3366 "mismated.\n", __func__)); 3367 return(EINVAL); 3368 } 3369 error = xform_init(sav, XF_TCPSIGNATURE); 3370 break; 3371 default: 3372 ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__)); 3373 error = EPROTONOSUPPORT; 3374 break; 3375 } 3376 if (error == 0) { 3377 SAHTREE_LOCK(); 3378 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3379 SAHTREE_UNLOCK(); 3380 } 3381 return (error); 3382 } 3383 3384 /* 3385 * subroutine for SADB_GET and SADB_DUMP. 3386 */ 3387 static struct mbuf * 3388 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3389 u_int32_t seq, u_int32_t pid) 3390 { 3391 struct mbuf *result = NULL, *tres = NULL, *m; 3392 int i; 3393 int dumporder[] = { 3394 SADB_EXT_SA, SADB_X_EXT_SA2, 3395 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3396 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3397 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3398 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3399 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3400 #ifdef IPSEC_NAT_T 3401 SADB_X_EXT_NAT_T_TYPE, 3402 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3403 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3404 SADB_X_EXT_NAT_T_FRAG, 3405 #endif 3406 }; 3407 3408 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3409 if (m == NULL) 3410 goto fail; 3411 result = m; 3412 3413 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3414 m = NULL; 3415 switch (dumporder[i]) { 3416 case SADB_EXT_SA: 3417 m = key_setsadbsa(sav); 3418 if (!m) 3419 goto fail; 3420 break; 3421 3422 case SADB_X_EXT_SA2: 3423 m = key_setsadbxsa2(sav->sah->saidx.mode, 3424 sav->replay ? sav->replay->count : 0, 3425 sav->sah->saidx.reqid); 3426 if (!m) 3427 goto fail; 3428 break; 3429 3430 case SADB_EXT_ADDRESS_SRC: 3431 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3432 &sav->sah->saidx.src.sa, 3433 FULLMASK, IPSEC_ULPROTO_ANY); 3434 if (!m) 3435 goto fail; 3436 break; 3437 3438 case SADB_EXT_ADDRESS_DST: 3439 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3440 &sav->sah->saidx.dst.sa, 3441 FULLMASK, IPSEC_ULPROTO_ANY); 3442 if (!m) 3443 goto fail; 3444 break; 3445 3446 case SADB_EXT_KEY_AUTH: 3447 if (!sav->key_auth) 3448 continue; 3449 m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH); 3450 if (!m) 3451 goto fail; 3452 break; 3453 3454 case SADB_EXT_KEY_ENCRYPT: 3455 if (!sav->key_enc) 3456 continue; 3457 m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT); 3458 if (!m) 3459 goto fail; 3460 break; 3461 3462 case SADB_EXT_LIFETIME_CURRENT: 3463 if (!sav->lft_c) 3464 continue; 3465 m = key_setlifetime(sav->lft_c, 3466 SADB_EXT_LIFETIME_CURRENT); 3467 if (!m) 3468 goto fail; 3469 break; 3470 3471 case SADB_EXT_LIFETIME_HARD: 3472 if (!sav->lft_h) 3473 continue; 3474 m = key_setlifetime(sav->lft_h, 3475 SADB_EXT_LIFETIME_HARD); 3476 if (!m) 3477 goto fail; 3478 break; 3479 3480 case SADB_EXT_LIFETIME_SOFT: 3481 if (!sav->lft_s) 3482 continue; 3483 m = key_setlifetime(sav->lft_s, 3484 SADB_EXT_LIFETIME_SOFT); 3485 3486 if (!m) 3487 goto fail; 3488 break; 3489 3490 #ifdef IPSEC_NAT_T 3491 case SADB_X_EXT_NAT_T_TYPE: 3492 m = key_setsadbxtype(sav->natt_type); 3493 if (!m) 3494 goto fail; 3495 break; 3496 3497 case SADB_X_EXT_NAT_T_DPORT: 3498 m = key_setsadbxport( 3499 KEY_PORTFROMSADDR(&sav->sah->saidx.dst), 3500 SADB_X_EXT_NAT_T_DPORT); 3501 if (!m) 3502 goto fail; 3503 break; 3504 3505 case SADB_X_EXT_NAT_T_SPORT: 3506 m = key_setsadbxport( 3507 KEY_PORTFROMSADDR(&sav->sah->saidx.src), 3508 SADB_X_EXT_NAT_T_SPORT); 3509 if (!m) 3510 goto fail; 3511 break; 3512 3513 case SADB_X_EXT_NAT_T_OAI: 3514 case SADB_X_EXT_NAT_T_OAR: 3515 case SADB_X_EXT_NAT_T_FRAG: 3516 /* We do not (yet) support those. */ 3517 continue; 3518 #endif 3519 3520 case SADB_EXT_ADDRESS_PROXY: 3521 case SADB_EXT_IDENTITY_SRC: 3522 case SADB_EXT_IDENTITY_DST: 3523 /* XXX: should we brought from SPD ? */ 3524 case SADB_EXT_SENSITIVITY: 3525 default: 3526 continue; 3527 } 3528 3529 if (!m) 3530 goto fail; 3531 if (tres) 3532 m_cat(m, tres); 3533 tres = m; 3534 3535 } 3536 3537 m_cat(result, tres); 3538 if (result->m_len < sizeof(struct sadb_msg)) { 3539 result = m_pullup(result, sizeof(struct sadb_msg)); 3540 if (result == NULL) 3541 goto fail; 3542 } 3543 3544 result->m_pkthdr.len = 0; 3545 for (m = result; m; m = m->m_next) 3546 result->m_pkthdr.len += m->m_len; 3547 3548 mtod(result, struct sadb_msg *)->sadb_msg_len = 3549 PFKEY_UNIT64(result->m_pkthdr.len); 3550 3551 return result; 3552 3553 fail: 3554 m_freem(result); 3555 m_freem(tres); 3556 return NULL; 3557 } 3558 3559 /* 3560 * set data into sadb_msg. 3561 */ 3562 static struct mbuf * 3563 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq, 3564 pid_t pid, u_int16_t reserved) 3565 { 3566 struct mbuf *m; 3567 struct sadb_msg *p; 3568 int len; 3569 3570 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3571 if (len > MCLBYTES) 3572 return NULL; 3573 MGETHDR(m, M_NOWAIT, MT_DATA); 3574 if (m && len > MHLEN) { 3575 MCLGET(m, M_NOWAIT); 3576 if ((m->m_flags & M_EXT) == 0) { 3577 m_freem(m); 3578 m = NULL; 3579 } 3580 } 3581 if (!m) 3582 return NULL; 3583 m->m_pkthdr.len = m->m_len = len; 3584 m->m_next = NULL; 3585 3586 p = mtod(m, struct sadb_msg *); 3587 3588 bzero(p, len); 3589 p->sadb_msg_version = PF_KEY_V2; 3590 p->sadb_msg_type = type; 3591 p->sadb_msg_errno = 0; 3592 p->sadb_msg_satype = satype; 3593 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3594 p->sadb_msg_reserved = reserved; 3595 p->sadb_msg_seq = seq; 3596 p->sadb_msg_pid = (u_int32_t)pid; 3597 3598 return m; 3599 } 3600 3601 /* 3602 * copy secasvar data into sadb_address. 3603 */ 3604 static struct mbuf * 3605 key_setsadbsa(sav) 3606 struct secasvar *sav; 3607 { 3608 struct mbuf *m; 3609 struct sadb_sa *p; 3610 int len; 3611 3612 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3613 m = m_get2(len, M_NOWAIT, MT_DATA, 0); 3614 if (m == NULL) 3615 return (NULL); 3616 m_align(m, len); 3617 m->m_len = len; 3618 p = mtod(m, struct sadb_sa *); 3619 bzero(p, len); 3620 p->sadb_sa_len = PFKEY_UNIT64(len); 3621 p->sadb_sa_exttype = SADB_EXT_SA; 3622 p->sadb_sa_spi = sav->spi; 3623 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3624 p->sadb_sa_state = sav->state; 3625 p->sadb_sa_auth = sav->alg_auth; 3626 p->sadb_sa_encrypt = sav->alg_enc; 3627 p->sadb_sa_flags = sav->flags; 3628 3629 return m; 3630 } 3631 3632 /* 3633 * set data into sadb_address. 3634 */ 3635 static struct mbuf * 3636 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto) 3637 { 3638 struct mbuf *m; 3639 struct sadb_address *p; 3640 size_t len; 3641 3642 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3643 PFKEY_ALIGN8(saddr->sa_len); 3644 m = m_get2(len, M_NOWAIT, MT_DATA, 0); 3645 if (m == NULL) 3646 return (NULL); 3647 m_align(m, len); 3648 m->m_len = len; 3649 p = mtod(m, struct sadb_address *); 3650 3651 bzero(p, len); 3652 p->sadb_address_len = PFKEY_UNIT64(len); 3653 p->sadb_address_exttype = exttype; 3654 p->sadb_address_proto = ul_proto; 3655 if (prefixlen == FULLMASK) { 3656 switch (saddr->sa_family) { 3657 case AF_INET: 3658 prefixlen = sizeof(struct in_addr) << 3; 3659 break; 3660 case AF_INET6: 3661 prefixlen = sizeof(struct in6_addr) << 3; 3662 break; 3663 default: 3664 ; /*XXX*/ 3665 } 3666 } 3667 p->sadb_address_prefixlen = prefixlen; 3668 p->sadb_address_reserved = 0; 3669 3670 bcopy(saddr, 3671 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3672 saddr->sa_len); 3673 3674 return m; 3675 } 3676 3677 /* 3678 * set data into sadb_x_sa2. 3679 */ 3680 static struct mbuf * 3681 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid) 3682 { 3683 struct mbuf *m; 3684 struct sadb_x_sa2 *p; 3685 size_t len; 3686 3687 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3688 m = m_get2(len, M_NOWAIT, MT_DATA, 0); 3689 if (m == NULL) 3690 return (NULL); 3691 m_align(m, len); 3692 m->m_len = len; 3693 p = mtod(m, struct sadb_x_sa2 *); 3694 3695 bzero(p, len); 3696 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3697 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3698 p->sadb_x_sa2_mode = mode; 3699 p->sadb_x_sa2_reserved1 = 0; 3700 p->sadb_x_sa2_reserved2 = 0; 3701 p->sadb_x_sa2_sequence = seq; 3702 p->sadb_x_sa2_reqid = reqid; 3703 3704 return m; 3705 } 3706 3707 #ifdef IPSEC_NAT_T 3708 /* 3709 * Set a type in sadb_x_nat_t_type. 3710 */ 3711 static struct mbuf * 3712 key_setsadbxtype(u_int16_t type) 3713 { 3714 struct mbuf *m; 3715 size_t len; 3716 struct sadb_x_nat_t_type *p; 3717 3718 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3719 3720 m = m_get2(len, M_NOWAIT, MT_DATA, 0); 3721 if (m == NULL) 3722 return (NULL); 3723 m_align(m, len); 3724 m->m_len = len; 3725 p = mtod(m, struct sadb_x_nat_t_type *); 3726 3727 bzero(p, len); 3728 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3729 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3730 p->sadb_x_nat_t_type_type = type; 3731 3732 return (m); 3733 } 3734 /* 3735 * Set a port in sadb_x_nat_t_port. 3736 * In contrast to default RFC 2367 behaviour, port is in network byte order. 3737 */ 3738 static struct mbuf * 3739 key_setsadbxport(u_int16_t port, u_int16_t type) 3740 { 3741 struct mbuf *m; 3742 size_t len; 3743 struct sadb_x_nat_t_port *p; 3744 3745 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3746 3747 m = m_get2(len, M_NOWAIT, MT_DATA, 0); 3748 if (m == NULL) 3749 return (NULL); 3750 m_align(m, len); 3751 m->m_len = len; 3752 p = mtod(m, struct sadb_x_nat_t_port *); 3753 3754 bzero(p, len); 3755 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3756 p->sadb_x_nat_t_port_exttype = type; 3757 p->sadb_x_nat_t_port_port = port; 3758 3759 return (m); 3760 } 3761 3762 /* 3763 * Get port from sockaddr. Port is in network byte order. 3764 */ 3765 u_int16_t 3766 key_portfromsaddr(struct sockaddr *sa) 3767 { 3768 3769 switch (sa->sa_family) { 3770 #ifdef INET 3771 case AF_INET: 3772 return ((struct sockaddr_in *)sa)->sin_port; 3773 #endif 3774 #ifdef INET6 3775 case AF_INET6: 3776 return ((struct sockaddr_in6 *)sa)->sin6_port; 3777 #endif 3778 } 3779 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3780 printf("DP %s unexpected address family %d\n", 3781 __func__, sa->sa_family)); 3782 return (0); 3783 } 3784 #endif /* IPSEC_NAT_T */ 3785 3786 /* 3787 * Set port in struct sockaddr. Port is in network byte order. 3788 */ 3789 static void 3790 key_porttosaddr(struct sockaddr *sa, u_int16_t port) 3791 { 3792 3793 switch (sa->sa_family) { 3794 #ifdef INET 3795 case AF_INET: 3796 ((struct sockaddr_in *)sa)->sin_port = port; 3797 break; 3798 #endif 3799 #ifdef INET6 3800 case AF_INET6: 3801 ((struct sockaddr_in6 *)sa)->sin6_port = port; 3802 break; 3803 #endif 3804 default: 3805 ipseclog((LOG_DEBUG, "%s: unexpected address family %d.\n", 3806 __func__, sa->sa_family)); 3807 break; 3808 } 3809 } 3810 3811 /* 3812 * set data into sadb_x_policy 3813 */ 3814 static struct mbuf * 3815 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3816 { 3817 struct mbuf *m; 3818 struct sadb_x_policy *p; 3819 size_t len; 3820 3821 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3822 m = m_get2(len, M_NOWAIT, MT_DATA, 0); 3823 if (m == NULL) 3824 return (NULL); 3825 m_align(m, len); 3826 m->m_len = len; 3827 p = mtod(m, struct sadb_x_policy *); 3828 3829 bzero(p, len); 3830 p->sadb_x_policy_len = PFKEY_UNIT64(len); 3831 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3832 p->sadb_x_policy_type = type; 3833 p->sadb_x_policy_dir = dir; 3834 p->sadb_x_policy_id = id; 3835 3836 return m; 3837 } 3838 3839 /* %%% utilities */ 3840 /* Take a key message (sadb_key) from the socket and turn it into one 3841 * of the kernel's key structures (seckey). 3842 * 3843 * IN: pointer to the src 3844 * OUT: NULL no more memory 3845 */ 3846 struct seckey * 3847 key_dup_keymsg(const struct sadb_key *src, u_int len, 3848 struct malloc_type *type) 3849 { 3850 struct seckey *dst; 3851 dst = (struct seckey *)malloc(sizeof(struct seckey), type, M_NOWAIT); 3852 if (dst != NULL) { 3853 dst->bits = src->sadb_key_bits; 3854 dst->key_data = (char *)malloc(len, type, M_NOWAIT); 3855 if (dst->key_data != NULL) { 3856 bcopy((const char *)src + sizeof(struct sadb_key), 3857 dst->key_data, len); 3858 } else { 3859 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3860 __func__)); 3861 free(dst, type); 3862 dst = NULL; 3863 } 3864 } else { 3865 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3866 __func__)); 3867 3868 } 3869 return dst; 3870 } 3871 3872 /* Take a lifetime message (sadb_lifetime) passed in on a socket and 3873 * turn it into one of the kernel's lifetime structures (seclifetime). 3874 * 3875 * IN: pointer to the destination, source and malloc type 3876 * OUT: NULL, no more memory 3877 */ 3878 3879 static struct seclifetime * 3880 key_dup_lifemsg(const struct sadb_lifetime *src, 3881 struct malloc_type *type) 3882 { 3883 struct seclifetime *dst = NULL; 3884 3885 dst = (struct seclifetime *)malloc(sizeof(struct seclifetime), 3886 type, M_NOWAIT); 3887 if (dst == NULL) { 3888 /* XXX counter */ 3889 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3890 } else { 3891 dst->allocations = src->sadb_lifetime_allocations; 3892 dst->bytes = src->sadb_lifetime_bytes; 3893 dst->addtime = src->sadb_lifetime_addtime; 3894 dst->usetime = src->sadb_lifetime_usetime; 3895 } 3896 return dst; 3897 } 3898 3899 /* compare my own address 3900 * OUT: 1: true, i.e. my address. 3901 * 0: false 3902 */ 3903 int 3904 key_ismyaddr(sa) 3905 struct sockaddr *sa; 3906 { 3907 #ifdef INET 3908 struct sockaddr_in *sin; 3909 struct in_ifaddr *ia; 3910 #endif 3911 3912 IPSEC_ASSERT(sa != NULL, ("null sockaddr")); 3913 3914 switch (sa->sa_family) { 3915 #ifdef INET 3916 case AF_INET: 3917 sin = (struct sockaddr_in *)sa; 3918 IN_IFADDR_RLOCK(); 3919 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) 3920 { 3921 if (sin->sin_family == ia->ia_addr.sin_family && 3922 sin->sin_len == ia->ia_addr.sin_len && 3923 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3924 { 3925 IN_IFADDR_RUNLOCK(); 3926 return 1; 3927 } 3928 } 3929 IN_IFADDR_RUNLOCK(); 3930 break; 3931 #endif 3932 #ifdef INET6 3933 case AF_INET6: 3934 return key_ismyaddr6((struct sockaddr_in6 *)sa); 3935 #endif 3936 } 3937 3938 return 0; 3939 } 3940 3941 #ifdef INET6 3942 /* 3943 * compare my own address for IPv6. 3944 * 1: ours 3945 * 0: other 3946 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3947 */ 3948 #include <netinet6/in6_var.h> 3949 3950 static int 3951 key_ismyaddr6(sin6) 3952 struct sockaddr_in6 *sin6; 3953 { 3954 struct in6_ifaddr *ia; 3955 #if 0 3956 struct in6_multi *in6m; 3957 #endif 3958 3959 IN6_IFADDR_RLOCK(); 3960 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 3961 if (key_sockaddrcmp((struct sockaddr *)&sin6, 3962 (struct sockaddr *)&ia->ia_addr, 0) == 0) { 3963 IN6_IFADDR_RUNLOCK(); 3964 return 1; 3965 } 3966 3967 #if 0 3968 /* 3969 * XXX Multicast 3970 * XXX why do we care about multlicast here while we don't care 3971 * about IPv4 multicast?? 3972 * XXX scope 3973 */ 3974 in6m = NULL; 3975 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3976 if (in6m) { 3977 IN6_IFADDR_RUNLOCK(); 3978 return 1; 3979 } 3980 #endif 3981 } 3982 IN6_IFADDR_RUNLOCK(); 3983 3984 /* loopback, just for safety */ 3985 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 3986 return 1; 3987 3988 return 0; 3989 } 3990 #endif /*INET6*/ 3991 3992 /* 3993 * compare two secasindex structure. 3994 * flag can specify to compare 2 saidxes. 3995 * compare two secasindex structure without both mode and reqid. 3996 * don't compare port. 3997 * IN: 3998 * saidx0: source, it can be in SAD. 3999 * saidx1: object. 4000 * OUT: 4001 * 1 : equal 4002 * 0 : not equal 4003 */ 4004 static int 4005 key_cmpsaidx( 4006 const struct secasindex *saidx0, 4007 const struct secasindex *saidx1, 4008 int flag) 4009 { 4010 int chkport = 0; 4011 4012 /* sanity */ 4013 if (saidx0 == NULL && saidx1 == NULL) 4014 return 1; 4015 4016 if (saidx0 == NULL || saidx1 == NULL) 4017 return 0; 4018 4019 if (saidx0->proto != saidx1->proto) 4020 return 0; 4021 4022 if (flag == CMP_EXACTLY) { 4023 if (saidx0->mode != saidx1->mode) 4024 return 0; 4025 if (saidx0->reqid != saidx1->reqid) 4026 return 0; 4027 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4028 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4029 return 0; 4030 } else { 4031 4032 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4033 if (flag == CMP_MODE_REQID 4034 ||flag == CMP_REQID) { 4035 /* 4036 * If reqid of SPD is non-zero, unique SA is required. 4037 * The result must be of same reqid in this case. 4038 */ 4039 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4040 return 0; 4041 } 4042 4043 if (flag == CMP_MODE_REQID) { 4044 if (saidx0->mode != IPSEC_MODE_ANY 4045 && saidx0->mode != saidx1->mode) 4046 return 0; 4047 } 4048 4049 #ifdef IPSEC_NAT_T 4050 /* 4051 * If NAT-T is enabled, check ports for tunnel mode. 4052 * Do not check ports if they are set to zero in the SPD. 4053 * Also do not do it for native transport mode, as there 4054 * is no port information available in the SP. 4055 */ 4056 if ((saidx1->mode == IPSEC_MODE_TUNNEL || 4057 (saidx1->mode == IPSEC_MODE_TRANSPORT && 4058 saidx1->proto == IPPROTO_ESP)) && 4059 saidx1->src.sa.sa_family == AF_INET && 4060 saidx1->dst.sa.sa_family == AF_INET && 4061 ((const struct sockaddr_in *)(&saidx1->src))->sin_port && 4062 ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) 4063 chkport = 1; 4064 #endif /* IPSEC_NAT_T */ 4065 4066 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4067 return 0; 4068 } 4069 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4070 return 0; 4071 } 4072 } 4073 4074 return 1; 4075 } 4076 4077 /* 4078 * compare two secindex structure exactly. 4079 * IN: 4080 * spidx0: source, it is often in SPD. 4081 * spidx1: object, it is often from PFKEY message. 4082 * OUT: 4083 * 1 : equal 4084 * 0 : not equal 4085 */ 4086 static int 4087 key_cmpspidx_exactly( 4088 struct secpolicyindex *spidx0, 4089 struct secpolicyindex *spidx1) 4090 { 4091 /* sanity */ 4092 if (spidx0 == NULL && spidx1 == NULL) 4093 return 1; 4094 4095 if (spidx0 == NULL || spidx1 == NULL) 4096 return 0; 4097 4098 if (spidx0->prefs != spidx1->prefs 4099 || spidx0->prefd != spidx1->prefd 4100 || spidx0->ul_proto != spidx1->ul_proto) 4101 return 0; 4102 4103 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4104 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4105 } 4106 4107 /* 4108 * compare two secindex structure with mask. 4109 * IN: 4110 * spidx0: source, it is often in SPD. 4111 * spidx1: object, it is often from IP header. 4112 * OUT: 4113 * 1 : equal 4114 * 0 : not equal 4115 */ 4116 static int 4117 key_cmpspidx_withmask( 4118 struct secpolicyindex *spidx0, 4119 struct secpolicyindex *spidx1) 4120 { 4121 /* sanity */ 4122 if (spidx0 == NULL && spidx1 == NULL) 4123 return 1; 4124 4125 if (spidx0 == NULL || spidx1 == NULL) 4126 return 0; 4127 4128 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4129 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4130 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4131 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4132 return 0; 4133 4134 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4135 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4136 && spidx0->ul_proto != spidx1->ul_proto) 4137 return 0; 4138 4139 switch (spidx0->src.sa.sa_family) { 4140 case AF_INET: 4141 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4142 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4143 return 0; 4144 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4145 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4146 return 0; 4147 break; 4148 case AF_INET6: 4149 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4150 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4151 return 0; 4152 /* 4153 * scope_id check. if sin6_scope_id is 0, we regard it 4154 * as a wildcard scope, which matches any scope zone ID. 4155 */ 4156 if (spidx0->src.sin6.sin6_scope_id && 4157 spidx1->src.sin6.sin6_scope_id && 4158 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4159 return 0; 4160 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4161 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4162 return 0; 4163 break; 4164 default: 4165 /* XXX */ 4166 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4167 return 0; 4168 break; 4169 } 4170 4171 switch (spidx0->dst.sa.sa_family) { 4172 case AF_INET: 4173 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4174 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4175 return 0; 4176 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4177 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4178 return 0; 4179 break; 4180 case AF_INET6: 4181 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4182 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4183 return 0; 4184 /* 4185 * scope_id check. if sin6_scope_id is 0, we regard it 4186 * as a wildcard scope, which matches any scope zone ID. 4187 */ 4188 if (spidx0->dst.sin6.sin6_scope_id && 4189 spidx1->dst.sin6.sin6_scope_id && 4190 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4191 return 0; 4192 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4193 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4194 return 0; 4195 break; 4196 default: 4197 /* XXX */ 4198 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4199 return 0; 4200 break; 4201 } 4202 4203 /* XXX Do we check other field ? e.g. flowinfo */ 4204 4205 return 1; 4206 } 4207 4208 /* returns 0 on match */ 4209 static int 4210 key_sockaddrcmp( 4211 const struct sockaddr *sa1, 4212 const struct sockaddr *sa2, 4213 int port) 4214 { 4215 #ifdef satosin 4216 #undef satosin 4217 #endif 4218 #define satosin(s) ((const struct sockaddr_in *)s) 4219 #ifdef satosin6 4220 #undef satosin6 4221 #endif 4222 #define satosin6(s) ((const struct sockaddr_in6 *)s) 4223 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4224 return 1; 4225 4226 switch (sa1->sa_family) { 4227 case AF_INET: 4228 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4229 return 1; 4230 if (satosin(sa1)->sin_addr.s_addr != 4231 satosin(sa2)->sin_addr.s_addr) { 4232 return 1; 4233 } 4234 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4235 return 1; 4236 break; 4237 case AF_INET6: 4238 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4239 return 1; /*EINVAL*/ 4240 if (satosin6(sa1)->sin6_scope_id != 4241 satosin6(sa2)->sin6_scope_id) { 4242 return 1; 4243 } 4244 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4245 &satosin6(sa2)->sin6_addr)) { 4246 return 1; 4247 } 4248 if (port && 4249 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4250 return 1; 4251 } 4252 break; 4253 default: 4254 if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4255 return 1; 4256 break; 4257 } 4258 4259 return 0; 4260 #undef satosin 4261 #undef satosin6 4262 } 4263 4264 /* 4265 * compare two buffers with mask. 4266 * IN: 4267 * addr1: source 4268 * addr2: object 4269 * bits: Number of bits to compare 4270 * OUT: 4271 * 1 : equal 4272 * 0 : not equal 4273 */ 4274 static int 4275 key_bbcmp(const void *a1, const void *a2, u_int bits) 4276 { 4277 const unsigned char *p1 = a1; 4278 const unsigned char *p2 = a2; 4279 4280 /* XXX: This could be considerably faster if we compare a word 4281 * at a time, but it is complicated on LSB Endian machines */ 4282 4283 /* Handle null pointers */ 4284 if (p1 == NULL || p2 == NULL) 4285 return (p1 == p2); 4286 4287 while (bits >= 8) { 4288 if (*p1++ != *p2++) 4289 return 0; 4290 bits -= 8; 4291 } 4292 4293 if (bits > 0) { 4294 u_int8_t mask = ~((1<<(8-bits))-1); 4295 if ((*p1 & mask) != (*p2 & mask)) 4296 return 0; 4297 } 4298 return 1; /* Match! */ 4299 } 4300 4301 static void 4302 key_flush_spd(time_t now) 4303 { 4304 static u_int16_t sptree_scangen = 0; 4305 u_int16_t gen = sptree_scangen++; 4306 struct secpolicy *sp; 4307 u_int dir; 4308 4309 /* SPD */ 4310 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4311 restart: 4312 SPTREE_LOCK(); 4313 LIST_FOREACH(sp, &V_sptree[dir], chain) { 4314 if (sp->scangen == gen) /* previously handled */ 4315 continue; 4316 sp->scangen = gen; 4317 if (sp->state == IPSEC_SPSTATE_DEAD && 4318 sp->refcnt == 1) { 4319 /* 4320 * Ensure that we only decrease refcnt once, 4321 * when we're the last consumer. 4322 * Directly call SP_DELREF/key_delsp instead 4323 * of KEY_FREESP to avoid unlocking/relocking 4324 * SPTREE_LOCK before key_delsp: may refcnt 4325 * be increased again during that time ? 4326 * NB: also clean entries created by 4327 * key_spdflush 4328 */ 4329 SP_DELREF(sp); 4330 key_delsp(sp); 4331 SPTREE_UNLOCK(); 4332 goto restart; 4333 } 4334 if (sp->lifetime == 0 && sp->validtime == 0) 4335 continue; 4336 if ((sp->lifetime && now - sp->created > sp->lifetime) 4337 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4338 sp->state = IPSEC_SPSTATE_DEAD; 4339 SPTREE_UNLOCK(); 4340 key_spdexpire(sp); 4341 goto restart; 4342 } 4343 } 4344 SPTREE_UNLOCK(); 4345 } 4346 } 4347 4348 static void 4349 key_flush_sad(time_t now) 4350 { 4351 struct secashead *sah, *nextsah; 4352 struct secasvar *sav, *nextsav; 4353 4354 /* SAD */ 4355 SAHTREE_LOCK(); 4356 LIST_FOREACH_SAFE(sah, &V_sahtree, chain, nextsah) { 4357 /* if sah has been dead, then delete it and process next sah. */ 4358 if (sah->state == SADB_SASTATE_DEAD) { 4359 key_delsah(sah); 4360 continue; 4361 } 4362 4363 /* if LARVAL entry doesn't become MATURE, delete it. */ 4364 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) { 4365 /* Need to also check refcnt for a larval SA ??? */ 4366 if (now - sav->created > V_key_larval_lifetime) 4367 KEY_FREESAV(&sav); 4368 } 4369 4370 /* 4371 * check MATURE entry to start to send expire message 4372 * whether or not. 4373 */ 4374 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) { 4375 /* we don't need to check. */ 4376 if (sav->lft_s == NULL) 4377 continue; 4378 4379 /* sanity check */ 4380 if (sav->lft_c == NULL) { 4381 ipseclog((LOG_DEBUG,"%s: there is no CURRENT " 4382 "time, why?\n", __func__)); 4383 continue; 4384 } 4385 4386 /* check SOFT lifetime */ 4387 if (sav->lft_s->addtime != 0 && 4388 now - sav->created > sav->lft_s->addtime) { 4389 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4390 /* 4391 * Actually, only send expire message if 4392 * SA has been used, as it was done before, 4393 * but should we always send such message, 4394 * and let IKE daemon decide if it should be 4395 * renegotiated or not ? 4396 * XXX expire message will actually NOT be 4397 * sent if SA is only used after soft 4398 * lifetime has been reached, see below 4399 * (DYING state) 4400 */ 4401 if (sav->lft_c->usetime != 0) 4402 key_expire(sav); 4403 } 4404 /* check SOFT lifetime by bytes */ 4405 /* 4406 * XXX I don't know the way to delete this SA 4407 * when new SA is installed. Caution when it's 4408 * installed too big lifetime by time. 4409 */ 4410 else if (sav->lft_s->bytes != 0 && 4411 sav->lft_s->bytes < sav->lft_c->bytes) { 4412 4413 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4414 /* 4415 * XXX If we keep to send expire 4416 * message in the status of 4417 * DYING. Do remove below code. 4418 */ 4419 key_expire(sav); 4420 } 4421 } 4422 4423 /* check DYING entry to change status to DEAD. */ 4424 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) { 4425 /* we don't need to check. */ 4426 if (sav->lft_h == NULL) 4427 continue; 4428 4429 /* sanity check */ 4430 if (sav->lft_c == NULL) { 4431 ipseclog((LOG_DEBUG, "%s: there is no CURRENT " 4432 "time, why?\n", __func__)); 4433 continue; 4434 } 4435 4436 if (sav->lft_h->addtime != 0 && 4437 now - sav->created > sav->lft_h->addtime) { 4438 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4439 KEY_FREESAV(&sav); 4440 } 4441 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4442 else if (sav->lft_s != NULL 4443 && sav->lft_s->addtime != 0 4444 && now - sav->created > sav->lft_s->addtime) { 4445 /* 4446 * XXX: should be checked to be 4447 * installed the valid SA. 4448 */ 4449 4450 /* 4451 * If there is no SA then sending 4452 * expire message. 4453 */ 4454 key_expire(sav); 4455 } 4456 #endif 4457 /* check HARD lifetime by bytes */ 4458 else if (sav->lft_h->bytes != 0 && 4459 sav->lft_h->bytes < sav->lft_c->bytes) { 4460 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4461 KEY_FREESAV(&sav); 4462 } 4463 } 4464 4465 /* delete entry in DEAD */ 4466 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) { 4467 /* sanity check */ 4468 if (sav->state != SADB_SASTATE_DEAD) { 4469 ipseclog((LOG_DEBUG, "%s: invalid sav->state " 4470 "(queue: %d SA: %d): kill it anyway\n", 4471 __func__, 4472 SADB_SASTATE_DEAD, sav->state)); 4473 } 4474 /* 4475 * do not call key_freesav() here. 4476 * sav should already be freed, and sav->refcnt 4477 * shows other references to sav 4478 * (such as from SPD). 4479 */ 4480 } 4481 } 4482 SAHTREE_UNLOCK(); 4483 } 4484 4485 static void 4486 key_flush_acq(time_t now) 4487 { 4488 struct secacq *acq, *nextacq; 4489 4490 /* ACQ tree */ 4491 ACQ_LOCK(); 4492 for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 4493 nextacq = LIST_NEXT(acq, chain); 4494 if (now - acq->created > V_key_blockacq_lifetime 4495 && __LIST_CHAINED(acq)) { 4496 LIST_REMOVE(acq, chain); 4497 free(acq, M_IPSEC_SAQ); 4498 } 4499 } 4500 ACQ_UNLOCK(); 4501 } 4502 4503 static void 4504 key_flush_spacq(time_t now) 4505 { 4506 struct secspacq *acq, *nextacq; 4507 4508 /* SP ACQ tree */ 4509 SPACQ_LOCK(); 4510 for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 4511 nextacq = LIST_NEXT(acq, chain); 4512 if (now - acq->created > V_key_blockacq_lifetime 4513 && __LIST_CHAINED(acq)) { 4514 LIST_REMOVE(acq, chain); 4515 free(acq, M_IPSEC_SAQ); 4516 } 4517 } 4518 SPACQ_UNLOCK(); 4519 } 4520 4521 /* 4522 * time handler. 4523 * scanning SPD and SAD to check status for each entries, 4524 * and do to remove or to expire. 4525 * XXX: year 2038 problem may remain. 4526 */ 4527 void 4528 key_timehandler(void) 4529 { 4530 VNET_ITERATOR_DECL(vnet_iter); 4531 time_t now = time_second; 4532 4533 VNET_LIST_RLOCK_NOSLEEP(); 4534 VNET_FOREACH(vnet_iter) { 4535 CURVNET_SET(vnet_iter); 4536 key_flush_spd(now); 4537 key_flush_sad(now); 4538 key_flush_acq(now); 4539 key_flush_spacq(now); 4540 CURVNET_RESTORE(); 4541 } 4542 VNET_LIST_RUNLOCK_NOSLEEP(); 4543 4544 #ifndef IPSEC_DEBUG2 4545 /* do exchange to tick time !! */ 4546 (void)timeout((void *)key_timehandler, (void *)0, hz); 4547 #endif /* IPSEC_DEBUG2 */ 4548 } 4549 4550 u_long 4551 key_random() 4552 { 4553 u_long value; 4554 4555 key_randomfill(&value, sizeof(value)); 4556 return value; 4557 } 4558 4559 void 4560 key_randomfill(p, l) 4561 void *p; 4562 size_t l; 4563 { 4564 size_t n; 4565 u_long v; 4566 static int warn = 1; 4567 4568 n = 0; 4569 n = (size_t)read_random(p, (u_int)l); 4570 /* last resort */ 4571 while (n < l) { 4572 v = random(); 4573 bcopy(&v, (u_int8_t *)p + n, 4574 l - n < sizeof(v) ? l - n : sizeof(v)); 4575 n += sizeof(v); 4576 4577 if (warn) { 4578 printf("WARNING: pseudo-random number generator " 4579 "used for IPsec processing\n"); 4580 warn = 0; 4581 } 4582 } 4583 } 4584 4585 /* 4586 * map SADB_SATYPE_* to IPPROTO_*. 4587 * if satype == SADB_SATYPE then satype is mapped to ~0. 4588 * OUT: 4589 * 0: invalid satype. 4590 */ 4591 static u_int16_t 4592 key_satype2proto(u_int8_t satype) 4593 { 4594 switch (satype) { 4595 case SADB_SATYPE_UNSPEC: 4596 return IPSEC_PROTO_ANY; 4597 case SADB_SATYPE_AH: 4598 return IPPROTO_AH; 4599 case SADB_SATYPE_ESP: 4600 return IPPROTO_ESP; 4601 case SADB_X_SATYPE_IPCOMP: 4602 return IPPROTO_IPCOMP; 4603 case SADB_X_SATYPE_TCPSIGNATURE: 4604 return IPPROTO_TCP; 4605 default: 4606 return 0; 4607 } 4608 /* NOTREACHED */ 4609 } 4610 4611 /* 4612 * map IPPROTO_* to SADB_SATYPE_* 4613 * OUT: 4614 * 0: invalid protocol type. 4615 */ 4616 static u_int8_t 4617 key_proto2satype(u_int16_t proto) 4618 { 4619 switch (proto) { 4620 case IPPROTO_AH: 4621 return SADB_SATYPE_AH; 4622 case IPPROTO_ESP: 4623 return SADB_SATYPE_ESP; 4624 case IPPROTO_IPCOMP: 4625 return SADB_X_SATYPE_IPCOMP; 4626 case IPPROTO_TCP: 4627 return SADB_X_SATYPE_TCPSIGNATURE; 4628 default: 4629 return 0; 4630 } 4631 /* NOTREACHED */ 4632 } 4633 4634 /* %%% PF_KEY */ 4635 /* 4636 * SADB_GETSPI processing is to receive 4637 * <base, (SA2), src address, dst address, (SPI range)> 4638 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4639 * tree with the status of LARVAL, and send 4640 * <base, SA(*), address(SD)> 4641 * to the IKMPd. 4642 * 4643 * IN: mhp: pointer to the pointer to each header. 4644 * OUT: NULL if fail. 4645 * other if success, return pointer to the message to send. 4646 */ 4647 static int 4648 key_getspi(so, m, mhp) 4649 struct socket *so; 4650 struct mbuf *m; 4651 const struct sadb_msghdr *mhp; 4652 { 4653 struct sadb_address *src0, *dst0; 4654 struct secasindex saidx; 4655 struct secashead *newsah; 4656 struct secasvar *newsav; 4657 u_int8_t proto; 4658 u_int32_t spi; 4659 u_int8_t mode; 4660 u_int32_t reqid; 4661 int error; 4662 4663 IPSEC_ASSERT(so != NULL, ("null socket")); 4664 IPSEC_ASSERT(m != NULL, ("null mbuf")); 4665 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4666 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4667 4668 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4669 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4670 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4671 __func__)); 4672 return key_senderror(so, m, EINVAL); 4673 } 4674 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4675 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4676 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4677 __func__)); 4678 return key_senderror(so, m, EINVAL); 4679 } 4680 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4681 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4682 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4683 } else { 4684 mode = IPSEC_MODE_ANY; 4685 reqid = 0; 4686 } 4687 4688 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4689 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4690 4691 /* map satype to proto */ 4692 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4693 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4694 __func__)); 4695 return key_senderror(so, m, EINVAL); 4696 } 4697 4698 /* 4699 * Make sure the port numbers are zero. 4700 * In case of NAT-T we will update them later if needed. 4701 */ 4702 switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4703 case AF_INET: 4704 if (((struct sockaddr *)(src0 + 1))->sa_len != 4705 sizeof(struct sockaddr_in)) 4706 return key_senderror(so, m, EINVAL); 4707 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4708 break; 4709 case AF_INET6: 4710 if (((struct sockaddr *)(src0 + 1))->sa_len != 4711 sizeof(struct sockaddr_in6)) 4712 return key_senderror(so, m, EINVAL); 4713 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4714 break; 4715 default: 4716 ; /*???*/ 4717 } 4718 switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4719 case AF_INET: 4720 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4721 sizeof(struct sockaddr_in)) 4722 return key_senderror(so, m, EINVAL); 4723 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4724 break; 4725 case AF_INET6: 4726 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4727 sizeof(struct sockaddr_in6)) 4728 return key_senderror(so, m, EINVAL); 4729 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4730 break; 4731 default: 4732 ; /*???*/ 4733 } 4734 4735 /* XXX boundary check against sa_len */ 4736 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4737 4738 #ifdef IPSEC_NAT_T 4739 /* 4740 * Handle NAT-T info if present. 4741 * We made sure the port numbers are zero above, so we do 4742 * not have to worry in case we do not update them. 4743 */ 4744 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 4745 ipseclog((LOG_DEBUG, "%s: NAT-T OAi present\n", __func__)); 4746 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 4747 ipseclog((LOG_DEBUG, "%s: NAT-T OAr present\n", __func__)); 4748 4749 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 4750 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 4751 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 4752 struct sadb_x_nat_t_type *type; 4753 struct sadb_x_nat_t_port *sport, *dport; 4754 4755 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 4756 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 4757 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 4758 ipseclog((LOG_DEBUG, "%s: invalid nat-t message " 4759 "passed.\n", __func__)); 4760 return key_senderror(so, m, EINVAL); 4761 } 4762 4763 sport = (struct sadb_x_nat_t_port *) 4764 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 4765 dport = (struct sadb_x_nat_t_port *) 4766 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 4767 4768 if (sport) 4769 KEY_PORTTOSADDR(&saidx.src, sport->sadb_x_nat_t_port_port); 4770 if (dport) 4771 KEY_PORTTOSADDR(&saidx.dst, dport->sadb_x_nat_t_port_port); 4772 } 4773 #endif 4774 4775 /* SPI allocation */ 4776 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4777 &saidx); 4778 if (spi == 0) 4779 return key_senderror(so, m, EINVAL); 4780 4781 /* get a SA index */ 4782 if ((newsah = key_getsah(&saidx)) == NULL) { 4783 /* create a new SA index */ 4784 if ((newsah = key_newsah(&saidx)) == NULL) { 4785 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4786 return key_senderror(so, m, ENOBUFS); 4787 } 4788 } 4789 4790 /* get a new SA */ 4791 /* XXX rewrite */ 4792 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4793 if (newsav == NULL) { 4794 /* XXX don't free new SA index allocated in above. */ 4795 return key_senderror(so, m, error); 4796 } 4797 4798 /* set spi */ 4799 newsav->spi = htonl(spi); 4800 4801 /* delete the entry in acqtree */ 4802 if (mhp->msg->sadb_msg_seq != 0) { 4803 struct secacq *acq; 4804 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4805 /* reset counter in order to deletion by timehandler. */ 4806 acq->created = time_second; 4807 acq->count = 0; 4808 } 4809 } 4810 4811 { 4812 struct mbuf *n, *nn; 4813 struct sadb_sa *m_sa; 4814 struct sadb_msg *newmsg; 4815 int off, len; 4816 4817 /* create new sadb_msg to reply. */ 4818 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4819 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4820 4821 MGETHDR(n, M_NOWAIT, MT_DATA); 4822 if (len > MHLEN) { 4823 MCLGET(n, M_NOWAIT); 4824 if ((n->m_flags & M_EXT) == 0) { 4825 m_freem(n); 4826 n = NULL; 4827 } 4828 } 4829 if (!n) 4830 return key_senderror(so, m, ENOBUFS); 4831 4832 n->m_len = len; 4833 n->m_next = NULL; 4834 off = 0; 4835 4836 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 4837 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4838 4839 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); 4840 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4841 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4842 m_sa->sadb_sa_spi = htonl(spi); 4843 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4844 4845 IPSEC_ASSERT(off == len, 4846 ("length inconsistency (off %u len %u)", off, len)); 4847 4848 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4849 SADB_EXT_ADDRESS_DST); 4850 if (!n->m_next) { 4851 m_freem(n); 4852 return key_senderror(so, m, ENOBUFS); 4853 } 4854 4855 if (n->m_len < sizeof(struct sadb_msg)) { 4856 n = m_pullup(n, sizeof(struct sadb_msg)); 4857 if (n == NULL) 4858 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4859 } 4860 4861 n->m_pkthdr.len = 0; 4862 for (nn = n; nn; nn = nn->m_next) 4863 n->m_pkthdr.len += nn->m_len; 4864 4865 newmsg = mtod(n, struct sadb_msg *); 4866 newmsg->sadb_msg_seq = newsav->seq; 4867 newmsg->sadb_msg_errno = 0; 4868 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4869 4870 m_freem(m); 4871 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4872 } 4873 } 4874 4875 /* 4876 * allocating new SPI 4877 * called by key_getspi(). 4878 * OUT: 4879 * 0: failure. 4880 * others: success. 4881 */ 4882 static u_int32_t 4883 key_do_getnewspi(spirange, saidx) 4884 struct sadb_spirange *spirange; 4885 struct secasindex *saidx; 4886 { 4887 u_int32_t newspi; 4888 u_int32_t min, max; 4889 int count = V_key_spi_trycnt; 4890 4891 /* set spi range to allocate */ 4892 if (spirange != NULL) { 4893 min = spirange->sadb_spirange_min; 4894 max = spirange->sadb_spirange_max; 4895 } else { 4896 min = V_key_spi_minval; 4897 max = V_key_spi_maxval; 4898 } 4899 /* IPCOMP needs 2-byte SPI */ 4900 if (saidx->proto == IPPROTO_IPCOMP) { 4901 u_int32_t t; 4902 if (min >= 0x10000) 4903 min = 0xffff; 4904 if (max >= 0x10000) 4905 max = 0xffff; 4906 if (min > max) { 4907 t = min; min = max; max = t; 4908 } 4909 } 4910 4911 if (min == max) { 4912 if (key_checkspidup(saidx, min) != NULL) { 4913 ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n", 4914 __func__, min)); 4915 return 0; 4916 } 4917 4918 count--; /* taking one cost. */ 4919 newspi = min; 4920 4921 } else { 4922 4923 /* init SPI */ 4924 newspi = 0; 4925 4926 /* when requesting to allocate spi ranged */ 4927 while (count--) { 4928 /* generate pseudo-random SPI value ranged. */ 4929 newspi = min + (key_random() % (max - min + 1)); 4930 4931 if (key_checkspidup(saidx, newspi) == NULL) 4932 break; 4933 } 4934 4935 if (count == 0 || newspi == 0) { 4936 ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n", 4937 __func__)); 4938 return 0; 4939 } 4940 } 4941 4942 /* statistics */ 4943 keystat.getspi_count = 4944 (keystat.getspi_count + V_key_spi_trycnt - count) / 2; 4945 4946 return newspi; 4947 } 4948 4949 /* 4950 * SADB_UPDATE processing 4951 * receive 4952 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4953 * key(AE), (identity(SD),) (sensitivity)> 4954 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4955 * and send 4956 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4957 * (identity(SD),) (sensitivity)> 4958 * to the ikmpd. 4959 * 4960 * m will always be freed. 4961 */ 4962 static int 4963 key_update(so, m, mhp) 4964 struct socket *so; 4965 struct mbuf *m; 4966 const struct sadb_msghdr *mhp; 4967 { 4968 struct sadb_sa *sa0; 4969 struct sadb_address *src0, *dst0; 4970 #ifdef IPSEC_NAT_T 4971 struct sadb_x_nat_t_type *type; 4972 struct sadb_x_nat_t_port *sport, *dport; 4973 struct sadb_address *iaddr, *raddr; 4974 struct sadb_x_nat_t_frag *frag; 4975 #endif 4976 struct secasindex saidx; 4977 struct secashead *sah; 4978 struct secasvar *sav; 4979 u_int16_t proto; 4980 u_int8_t mode; 4981 u_int32_t reqid; 4982 int error; 4983 4984 IPSEC_ASSERT(so != NULL, ("null socket")); 4985 IPSEC_ASSERT(m != NULL, ("null mbuf")); 4986 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4987 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4988 4989 /* map satype to proto */ 4990 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4991 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4992 __func__)); 4993 return key_senderror(so, m, EINVAL); 4994 } 4995 4996 if (mhp->ext[SADB_EXT_SA] == NULL || 4997 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4998 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4999 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5000 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5001 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5002 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5003 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5004 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5005 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5006 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5007 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5008 __func__)); 5009 return key_senderror(so, m, EINVAL); 5010 } 5011 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5012 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5013 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5014 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5015 __func__)); 5016 return key_senderror(so, m, EINVAL); 5017 } 5018 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5019 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5020 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5021 } else { 5022 mode = IPSEC_MODE_ANY; 5023 reqid = 0; 5024 } 5025 /* XXX boundary checking for other extensions */ 5026 5027 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5028 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5029 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5030 5031 /* XXX boundary check against sa_len */ 5032 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5033 5034 /* 5035 * Make sure the port numbers are zero. 5036 * In case of NAT-T we will update them later if needed. 5037 */ 5038 KEY_PORTTOSADDR(&saidx.src, 0); 5039 KEY_PORTTOSADDR(&saidx.dst, 0); 5040 5041 #ifdef IPSEC_NAT_T 5042 /* 5043 * Handle NAT-T info if present. 5044 */ 5045 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5046 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5047 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5048 5049 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5050 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5051 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5052 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5053 __func__)); 5054 return key_senderror(so, m, EINVAL); 5055 } 5056 5057 type = (struct sadb_x_nat_t_type *) 5058 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5059 sport = (struct sadb_x_nat_t_port *) 5060 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5061 dport = (struct sadb_x_nat_t_port *) 5062 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5063 } else { 5064 type = 0; 5065 sport = dport = 0; 5066 } 5067 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5068 mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5069 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5070 mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5071 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5072 __func__)); 5073 return key_senderror(so, m, EINVAL); 5074 } 5075 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5076 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5077 ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5078 } else { 5079 iaddr = raddr = NULL; 5080 } 5081 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5082 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5083 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5084 __func__)); 5085 return key_senderror(so, m, EINVAL); 5086 } 5087 frag = (struct sadb_x_nat_t_frag *) 5088 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5089 } else { 5090 frag = 0; 5091 } 5092 #endif 5093 5094 /* get a SA header */ 5095 if ((sah = key_getsah(&saidx)) == NULL) { 5096 ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__)); 5097 return key_senderror(so, m, ENOENT); 5098 } 5099 5100 /* set spidx if there */ 5101 /* XXX rewrite */ 5102 error = key_setident(sah, m, mhp); 5103 if (error) 5104 return key_senderror(so, m, error); 5105 5106 /* find a SA with sequence number. */ 5107 #ifdef IPSEC_DOSEQCHECK 5108 if (mhp->msg->sadb_msg_seq != 0 5109 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5110 ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u " 5111 "exists.\n", __func__, mhp->msg->sadb_msg_seq)); 5112 return key_senderror(so, m, ENOENT); 5113 } 5114 #else 5115 SAHTREE_LOCK(); 5116 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5117 SAHTREE_UNLOCK(); 5118 if (sav == NULL) { 5119 ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n", 5120 __func__, (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5121 return key_senderror(so, m, EINVAL); 5122 } 5123 #endif 5124 5125 /* validity check */ 5126 if (sav->sah->saidx.proto != proto) { 5127 ipseclog((LOG_DEBUG, "%s: protocol mismatched " 5128 "(DB=%u param=%u)\n", __func__, 5129 sav->sah->saidx.proto, proto)); 5130 return key_senderror(so, m, EINVAL); 5131 } 5132 #ifdef IPSEC_DOSEQCHECK 5133 if (sav->spi != sa0->sadb_sa_spi) { 5134 ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n", 5135 __func__, 5136 (u_int32_t)ntohl(sav->spi), 5137 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5138 return key_senderror(so, m, EINVAL); 5139 } 5140 #endif 5141 if (sav->pid != mhp->msg->sadb_msg_pid) { 5142 ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n", 5143 __func__, sav->pid, mhp->msg->sadb_msg_pid)); 5144 return key_senderror(so, m, EINVAL); 5145 } 5146 5147 /* copy sav values */ 5148 error = key_setsaval(sav, m, mhp); 5149 if (error) { 5150 KEY_FREESAV(&sav); 5151 return key_senderror(so, m, error); 5152 } 5153 5154 #ifdef IPSEC_NAT_T 5155 /* 5156 * Handle more NAT-T info if present, 5157 * now that we have a sav to fill. 5158 */ 5159 if (type) 5160 sav->natt_type = type->sadb_x_nat_t_type_type; 5161 5162 if (sport) 5163 KEY_PORTTOSADDR(&sav->sah->saidx.src, 5164 sport->sadb_x_nat_t_port_port); 5165 if (dport) 5166 KEY_PORTTOSADDR(&sav->sah->saidx.dst, 5167 dport->sadb_x_nat_t_port_port); 5168 5169 #if 0 5170 /* 5171 * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5172 * We should actually check for a minimum MTU here, if we 5173 * want to support it in ip_output. 5174 */ 5175 if (frag) 5176 sav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5177 #endif 5178 #endif 5179 5180 /* check SA values to be mature. */ 5181 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5182 KEY_FREESAV(&sav); 5183 return key_senderror(so, m, 0); 5184 } 5185 5186 { 5187 struct mbuf *n; 5188 5189 /* set msg buf from mhp */ 5190 n = key_getmsgbuf_x1(m, mhp); 5191 if (n == NULL) { 5192 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5193 return key_senderror(so, m, ENOBUFS); 5194 } 5195 5196 m_freem(m); 5197 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5198 } 5199 } 5200 5201 /* 5202 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5203 * only called by key_update(). 5204 * OUT: 5205 * NULL : not found 5206 * others : found, pointer to a SA. 5207 */ 5208 #ifdef IPSEC_DOSEQCHECK 5209 static struct secasvar * 5210 key_getsavbyseq(sah, seq) 5211 struct secashead *sah; 5212 u_int32_t seq; 5213 { 5214 struct secasvar *sav; 5215 u_int state; 5216 5217 state = SADB_SASTATE_LARVAL; 5218 5219 /* search SAD with sequence number ? */ 5220 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5221 5222 KEY_CHKSASTATE(state, sav->state, __func__); 5223 5224 if (sav->seq == seq) { 5225 sa_addref(sav); 5226 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5227 printf("DP %s cause refcnt++:%d SA:%p\n", 5228 __func__, sav->refcnt, sav)); 5229 return sav; 5230 } 5231 } 5232 5233 return NULL; 5234 } 5235 #endif 5236 5237 /* 5238 * SADB_ADD processing 5239 * add an entry to SA database, when received 5240 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5241 * key(AE), (identity(SD),) (sensitivity)> 5242 * from the ikmpd, 5243 * and send 5244 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5245 * (identity(SD),) (sensitivity)> 5246 * to the ikmpd. 5247 * 5248 * IGNORE identity and sensitivity messages. 5249 * 5250 * m will always be freed. 5251 */ 5252 static int 5253 key_add(so, m, mhp) 5254 struct socket *so; 5255 struct mbuf *m; 5256 const struct sadb_msghdr *mhp; 5257 { 5258 struct sadb_sa *sa0; 5259 struct sadb_address *src0, *dst0; 5260 #ifdef IPSEC_NAT_T 5261 struct sadb_x_nat_t_type *type; 5262 struct sadb_address *iaddr, *raddr; 5263 struct sadb_x_nat_t_frag *frag; 5264 #endif 5265 struct secasindex saidx; 5266 struct secashead *newsah; 5267 struct secasvar *newsav; 5268 u_int16_t proto; 5269 u_int8_t mode; 5270 u_int32_t reqid; 5271 int error; 5272 5273 IPSEC_ASSERT(so != NULL, ("null socket")); 5274 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5275 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5276 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5277 5278 /* map satype to proto */ 5279 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5280 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5281 __func__)); 5282 return key_senderror(so, m, EINVAL); 5283 } 5284 5285 if (mhp->ext[SADB_EXT_SA] == NULL || 5286 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5287 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5288 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5289 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5290 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5291 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5292 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5293 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5294 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5295 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5296 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5297 __func__)); 5298 return key_senderror(so, m, EINVAL); 5299 } 5300 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5301 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5302 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5303 /* XXX need more */ 5304 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5305 __func__)); 5306 return key_senderror(so, m, EINVAL); 5307 } 5308 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5309 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5310 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5311 } else { 5312 mode = IPSEC_MODE_ANY; 5313 reqid = 0; 5314 } 5315 5316 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5317 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5318 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5319 5320 /* XXX boundary check against sa_len */ 5321 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5322 5323 /* 5324 * Make sure the port numbers are zero. 5325 * In case of NAT-T we will update them later if needed. 5326 */ 5327 KEY_PORTTOSADDR(&saidx.src, 0); 5328 KEY_PORTTOSADDR(&saidx.dst, 0); 5329 5330 #ifdef IPSEC_NAT_T 5331 /* 5332 * Handle NAT-T info if present. 5333 */ 5334 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5335 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5336 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5337 struct sadb_x_nat_t_port *sport, *dport; 5338 5339 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5340 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5341 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5342 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5343 __func__)); 5344 return key_senderror(so, m, EINVAL); 5345 } 5346 5347 type = (struct sadb_x_nat_t_type *) 5348 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5349 sport = (struct sadb_x_nat_t_port *) 5350 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5351 dport = (struct sadb_x_nat_t_port *) 5352 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5353 5354 if (sport) 5355 KEY_PORTTOSADDR(&saidx.src, 5356 sport->sadb_x_nat_t_port_port); 5357 if (dport) 5358 KEY_PORTTOSADDR(&saidx.dst, 5359 dport->sadb_x_nat_t_port_port); 5360 } else { 5361 type = 0; 5362 } 5363 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5364 mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5365 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5366 mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5367 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5368 __func__)); 5369 return key_senderror(so, m, EINVAL); 5370 } 5371 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5372 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5373 ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5374 } else { 5375 iaddr = raddr = NULL; 5376 } 5377 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5378 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5379 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5380 __func__)); 5381 return key_senderror(so, m, EINVAL); 5382 } 5383 frag = (struct sadb_x_nat_t_frag *) 5384 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5385 } else { 5386 frag = 0; 5387 } 5388 #endif 5389 5390 /* get a SA header */ 5391 if ((newsah = key_getsah(&saidx)) == NULL) { 5392 /* create a new SA header */ 5393 if ((newsah = key_newsah(&saidx)) == NULL) { 5394 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 5395 return key_senderror(so, m, ENOBUFS); 5396 } 5397 } 5398 5399 /* set spidx if there */ 5400 /* XXX rewrite */ 5401 error = key_setident(newsah, m, mhp); 5402 if (error) { 5403 return key_senderror(so, m, error); 5404 } 5405 5406 /* create new SA entry. */ 5407 /* We can create new SA only if SPI is differenct. */ 5408 SAHTREE_LOCK(); 5409 newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 5410 SAHTREE_UNLOCK(); 5411 if (newsav != NULL) { 5412 ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__)); 5413 return key_senderror(so, m, EEXIST); 5414 } 5415 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5416 if (newsav == NULL) { 5417 return key_senderror(so, m, error); 5418 } 5419 5420 #ifdef IPSEC_NAT_T 5421 /* 5422 * Handle more NAT-T info if present, 5423 * now that we have a sav to fill. 5424 */ 5425 if (type) 5426 newsav->natt_type = type->sadb_x_nat_t_type_type; 5427 5428 #if 0 5429 /* 5430 * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5431 * We should actually check for a minimum MTU here, if we 5432 * want to support it in ip_output. 5433 */ 5434 if (frag) 5435 newsav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5436 #endif 5437 #endif 5438 5439 /* check SA values to be mature. */ 5440 if ((error = key_mature(newsav)) != 0) { 5441 KEY_FREESAV(&newsav); 5442 return key_senderror(so, m, error); 5443 } 5444 5445 /* 5446 * don't call key_freesav() here, as we would like to keep the SA 5447 * in the database on success. 5448 */ 5449 5450 { 5451 struct mbuf *n; 5452 5453 /* set msg buf from mhp */ 5454 n = key_getmsgbuf_x1(m, mhp); 5455 if (n == NULL) { 5456 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5457 return key_senderror(so, m, ENOBUFS); 5458 } 5459 5460 m_freem(m); 5461 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5462 } 5463 } 5464 5465 /* m is retained */ 5466 static int 5467 key_setident(sah, m, mhp) 5468 struct secashead *sah; 5469 struct mbuf *m; 5470 const struct sadb_msghdr *mhp; 5471 { 5472 const struct sadb_ident *idsrc, *iddst; 5473 int idsrclen, iddstlen; 5474 5475 IPSEC_ASSERT(sah != NULL, ("null secashead")); 5476 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5477 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5478 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5479 5480 /* don't make buffer if not there */ 5481 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5482 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5483 sah->idents = NULL; 5484 sah->identd = NULL; 5485 return 0; 5486 } 5487 5488 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5489 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5490 ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__)); 5491 return EINVAL; 5492 } 5493 5494 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5495 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5496 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5497 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5498 5499 /* validity check */ 5500 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5501 ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__)); 5502 return EINVAL; 5503 } 5504 5505 switch (idsrc->sadb_ident_type) { 5506 case SADB_IDENTTYPE_PREFIX: 5507 case SADB_IDENTTYPE_FQDN: 5508 case SADB_IDENTTYPE_USERFQDN: 5509 default: 5510 /* XXX do nothing */ 5511 sah->idents = NULL; 5512 sah->identd = NULL; 5513 return 0; 5514 } 5515 5516 /* make structure */ 5517 sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5518 if (sah->idents == NULL) { 5519 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5520 return ENOBUFS; 5521 } 5522 sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5523 if (sah->identd == NULL) { 5524 free(sah->idents, M_IPSEC_MISC); 5525 sah->idents = NULL; 5526 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5527 return ENOBUFS; 5528 } 5529 sah->idents->type = idsrc->sadb_ident_type; 5530 sah->idents->id = idsrc->sadb_ident_id; 5531 5532 sah->identd->type = iddst->sadb_ident_type; 5533 sah->identd->id = iddst->sadb_ident_id; 5534 5535 return 0; 5536 } 5537 5538 /* 5539 * m will not be freed on return. 5540 * it is caller's responsibility to free the result. 5541 */ 5542 static struct mbuf * 5543 key_getmsgbuf_x1(m, mhp) 5544 struct mbuf *m; 5545 const struct sadb_msghdr *mhp; 5546 { 5547 struct mbuf *n; 5548 5549 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5550 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5551 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5552 5553 /* create new sadb_msg to reply. */ 5554 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5555 SADB_EXT_SA, SADB_X_EXT_SA2, 5556 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5557 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5558 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5559 if (!n) 5560 return NULL; 5561 5562 if (n->m_len < sizeof(struct sadb_msg)) { 5563 n = m_pullup(n, sizeof(struct sadb_msg)); 5564 if (n == NULL) 5565 return NULL; 5566 } 5567 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5568 mtod(n, struct sadb_msg *)->sadb_msg_len = 5569 PFKEY_UNIT64(n->m_pkthdr.len); 5570 5571 return n; 5572 } 5573 5574 static int key_delete_all __P((struct socket *, struct mbuf *, 5575 const struct sadb_msghdr *, u_int16_t)); 5576 5577 /* 5578 * SADB_DELETE processing 5579 * receive 5580 * <base, SA(*), address(SD)> 5581 * from the ikmpd, and set SADB_SASTATE_DEAD, 5582 * and send, 5583 * <base, SA(*), address(SD)> 5584 * to the ikmpd. 5585 * 5586 * m will always be freed. 5587 */ 5588 static int 5589 key_delete(so, m, mhp) 5590 struct socket *so; 5591 struct mbuf *m; 5592 const struct sadb_msghdr *mhp; 5593 { 5594 struct sadb_sa *sa0; 5595 struct sadb_address *src0, *dst0; 5596 struct secasindex saidx; 5597 struct secashead *sah; 5598 struct secasvar *sav = NULL; 5599 u_int16_t proto; 5600 5601 IPSEC_ASSERT(so != NULL, ("null socket")); 5602 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5603 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5604 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5605 5606 /* map satype to proto */ 5607 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5608 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5609 __func__)); 5610 return key_senderror(so, m, EINVAL); 5611 } 5612 5613 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5614 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5615 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5616 __func__)); 5617 return key_senderror(so, m, EINVAL); 5618 } 5619 5620 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5621 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5622 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5623 __func__)); 5624 return key_senderror(so, m, EINVAL); 5625 } 5626 5627 if (mhp->ext[SADB_EXT_SA] == NULL) { 5628 /* 5629 * Caller wants us to delete all non-LARVAL SAs 5630 * that match the src/dst. This is used during 5631 * IKE INITIAL-CONTACT. 5632 */ 5633 ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__)); 5634 return key_delete_all(so, m, mhp, proto); 5635 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5636 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5637 __func__)); 5638 return key_senderror(so, m, EINVAL); 5639 } 5640 5641 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5642 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5643 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5644 5645 /* XXX boundary check against sa_len */ 5646 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5647 5648 /* 5649 * Make sure the port numbers are zero. 5650 * In case of NAT-T we will update them later if needed. 5651 */ 5652 KEY_PORTTOSADDR(&saidx.src, 0); 5653 KEY_PORTTOSADDR(&saidx.dst, 0); 5654 5655 #ifdef IPSEC_NAT_T 5656 /* 5657 * Handle NAT-T info if present. 5658 */ 5659 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5660 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5661 struct sadb_x_nat_t_port *sport, *dport; 5662 5663 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5664 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5665 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5666 __func__)); 5667 return key_senderror(so, m, EINVAL); 5668 } 5669 5670 sport = (struct sadb_x_nat_t_port *) 5671 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5672 dport = (struct sadb_x_nat_t_port *) 5673 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5674 5675 if (sport) 5676 KEY_PORTTOSADDR(&saidx.src, 5677 sport->sadb_x_nat_t_port_port); 5678 if (dport) 5679 KEY_PORTTOSADDR(&saidx.dst, 5680 dport->sadb_x_nat_t_port_port); 5681 } 5682 #endif 5683 5684 /* get a SA header */ 5685 SAHTREE_LOCK(); 5686 LIST_FOREACH(sah, &V_sahtree, chain) { 5687 if (sah->state == SADB_SASTATE_DEAD) 5688 continue; 5689 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5690 continue; 5691 5692 /* get a SA with SPI. */ 5693 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5694 if (sav) 5695 break; 5696 } 5697 if (sah == NULL) { 5698 SAHTREE_UNLOCK(); 5699 ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5700 return key_senderror(so, m, ENOENT); 5701 } 5702 5703 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5704 KEY_FREESAV(&sav); 5705 SAHTREE_UNLOCK(); 5706 5707 { 5708 struct mbuf *n; 5709 struct sadb_msg *newmsg; 5710 5711 /* create new sadb_msg to reply. */ 5712 /* XXX-BZ NAT-T extensions? */ 5713 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5714 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5715 if (!n) 5716 return key_senderror(so, m, ENOBUFS); 5717 5718 if (n->m_len < sizeof(struct sadb_msg)) { 5719 n = m_pullup(n, sizeof(struct sadb_msg)); 5720 if (n == NULL) 5721 return key_senderror(so, m, ENOBUFS); 5722 } 5723 newmsg = mtod(n, struct sadb_msg *); 5724 newmsg->sadb_msg_errno = 0; 5725 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5726 5727 m_freem(m); 5728 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5729 } 5730 } 5731 5732 /* 5733 * delete all SAs for src/dst. Called from key_delete(). 5734 */ 5735 static int 5736 key_delete_all(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp, 5737 u_int16_t proto) 5738 { 5739 struct sadb_address *src0, *dst0; 5740 struct secasindex saidx; 5741 struct secashead *sah; 5742 struct secasvar *sav, *nextsav; 5743 u_int stateidx, state; 5744 5745 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5746 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5747 5748 /* XXX boundary check against sa_len */ 5749 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5750 5751 /* 5752 * Make sure the port numbers are zero. 5753 * In case of NAT-T we will update them later if needed. 5754 */ 5755 KEY_PORTTOSADDR(&saidx.src, 0); 5756 KEY_PORTTOSADDR(&saidx.dst, 0); 5757 5758 #ifdef IPSEC_NAT_T 5759 /* 5760 * Handle NAT-T info if present. 5761 */ 5762 5763 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5764 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5765 struct sadb_x_nat_t_port *sport, *dport; 5766 5767 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5768 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5769 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5770 __func__)); 5771 return key_senderror(so, m, EINVAL); 5772 } 5773 5774 sport = (struct sadb_x_nat_t_port *) 5775 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5776 dport = (struct sadb_x_nat_t_port *) 5777 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5778 5779 if (sport) 5780 KEY_PORTTOSADDR(&saidx.src, 5781 sport->sadb_x_nat_t_port_port); 5782 if (dport) 5783 KEY_PORTTOSADDR(&saidx.dst, 5784 dport->sadb_x_nat_t_port_port); 5785 } 5786 #endif 5787 5788 SAHTREE_LOCK(); 5789 LIST_FOREACH(sah, &V_sahtree, chain) { 5790 if (sah->state == SADB_SASTATE_DEAD) 5791 continue; 5792 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5793 continue; 5794 5795 /* Delete all non-LARVAL SAs. */ 5796 for (stateidx = 0; 5797 stateidx < _ARRAYLEN(saorder_state_alive); 5798 stateidx++) { 5799 state = saorder_state_alive[stateidx]; 5800 if (state == SADB_SASTATE_LARVAL) 5801 continue; 5802 for (sav = LIST_FIRST(&sah->savtree[state]); 5803 sav != NULL; sav = nextsav) { 5804 nextsav = LIST_NEXT(sav, chain); 5805 /* sanity check */ 5806 if (sav->state != state) { 5807 ipseclog((LOG_DEBUG, "%s: invalid " 5808 "sav->state (queue %d SA %d)\n", 5809 __func__, state, sav->state)); 5810 continue; 5811 } 5812 5813 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5814 KEY_FREESAV(&sav); 5815 } 5816 } 5817 } 5818 SAHTREE_UNLOCK(); 5819 { 5820 struct mbuf *n; 5821 struct sadb_msg *newmsg; 5822 5823 /* create new sadb_msg to reply. */ 5824 /* XXX-BZ NAT-T extensions? */ 5825 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5826 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5827 if (!n) 5828 return key_senderror(so, m, ENOBUFS); 5829 5830 if (n->m_len < sizeof(struct sadb_msg)) { 5831 n = m_pullup(n, sizeof(struct sadb_msg)); 5832 if (n == NULL) 5833 return key_senderror(so, m, ENOBUFS); 5834 } 5835 newmsg = mtod(n, struct sadb_msg *); 5836 newmsg->sadb_msg_errno = 0; 5837 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5838 5839 m_freem(m); 5840 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5841 } 5842 } 5843 5844 /* 5845 * SADB_GET processing 5846 * receive 5847 * <base, SA(*), address(SD)> 5848 * from the ikmpd, and get a SP and a SA to respond, 5849 * and send, 5850 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5851 * (identity(SD),) (sensitivity)> 5852 * to the ikmpd. 5853 * 5854 * m will always be freed. 5855 */ 5856 static int 5857 key_get(so, m, mhp) 5858 struct socket *so; 5859 struct mbuf *m; 5860 const struct sadb_msghdr *mhp; 5861 { 5862 struct sadb_sa *sa0; 5863 struct sadb_address *src0, *dst0; 5864 struct secasindex saidx; 5865 struct secashead *sah; 5866 struct secasvar *sav = NULL; 5867 u_int16_t proto; 5868 5869 IPSEC_ASSERT(so != NULL, ("null socket")); 5870 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5871 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5872 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5873 5874 /* map satype to proto */ 5875 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5876 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5877 __func__)); 5878 return key_senderror(so, m, EINVAL); 5879 } 5880 5881 if (mhp->ext[SADB_EXT_SA] == NULL || 5882 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5883 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5884 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5885 __func__)); 5886 return key_senderror(so, m, EINVAL); 5887 } 5888 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5889 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5890 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5891 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5892 __func__)); 5893 return key_senderror(so, m, EINVAL); 5894 } 5895 5896 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5897 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5898 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5899 5900 /* XXX boundary check against sa_len */ 5901 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5902 5903 /* 5904 * Make sure the port numbers are zero. 5905 * In case of NAT-T we will update them later if needed. 5906 */ 5907 KEY_PORTTOSADDR(&saidx.src, 0); 5908 KEY_PORTTOSADDR(&saidx.dst, 0); 5909 5910 #ifdef IPSEC_NAT_T 5911 /* 5912 * Handle NAT-T info if present. 5913 */ 5914 5915 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5916 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5917 struct sadb_x_nat_t_port *sport, *dport; 5918 5919 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5920 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5921 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5922 __func__)); 5923 return key_senderror(so, m, EINVAL); 5924 } 5925 5926 sport = (struct sadb_x_nat_t_port *) 5927 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5928 dport = (struct sadb_x_nat_t_port *) 5929 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5930 5931 if (sport) 5932 KEY_PORTTOSADDR(&saidx.src, 5933 sport->sadb_x_nat_t_port_port); 5934 if (dport) 5935 KEY_PORTTOSADDR(&saidx.dst, 5936 dport->sadb_x_nat_t_port_port); 5937 } 5938 #endif 5939 5940 /* get a SA header */ 5941 SAHTREE_LOCK(); 5942 LIST_FOREACH(sah, &V_sahtree, chain) { 5943 if (sah->state == SADB_SASTATE_DEAD) 5944 continue; 5945 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5946 continue; 5947 5948 /* get a SA with SPI. */ 5949 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5950 if (sav) 5951 break; 5952 } 5953 SAHTREE_UNLOCK(); 5954 if (sah == NULL) { 5955 ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5956 return key_senderror(so, m, ENOENT); 5957 } 5958 5959 { 5960 struct mbuf *n; 5961 u_int8_t satype; 5962 5963 /* map proto to satype */ 5964 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5965 ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n", 5966 __func__)); 5967 return key_senderror(so, m, EINVAL); 5968 } 5969 5970 /* create new sadb_msg to reply. */ 5971 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5972 mhp->msg->sadb_msg_pid); 5973 if (!n) 5974 return key_senderror(so, m, ENOBUFS); 5975 5976 m_freem(m); 5977 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5978 } 5979 } 5980 5981 /* XXX make it sysctl-configurable? */ 5982 static void 5983 key_getcomb_setlifetime(comb) 5984 struct sadb_comb *comb; 5985 { 5986 5987 comb->sadb_comb_soft_allocations = 1; 5988 comb->sadb_comb_hard_allocations = 1; 5989 comb->sadb_comb_soft_bytes = 0; 5990 comb->sadb_comb_hard_bytes = 0; 5991 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5992 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5993 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5994 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5995 } 5996 5997 /* 5998 * XXX reorder combinations by preference 5999 * XXX no idea if the user wants ESP authentication or not 6000 */ 6001 static struct mbuf * 6002 key_getcomb_esp() 6003 { 6004 struct sadb_comb *comb; 6005 struct enc_xform *algo; 6006 struct mbuf *result = NULL, *m, *n; 6007 int encmin; 6008 int i, off, o; 6009 int totlen; 6010 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6011 6012 m = NULL; 6013 for (i = 1; i <= SADB_EALG_MAX; i++) { 6014 algo = esp_algorithm_lookup(i); 6015 if (algo == NULL) 6016 continue; 6017 6018 /* discard algorithms with key size smaller than system min */ 6019 if (_BITS(algo->maxkey) < V_ipsec_esp_keymin) 6020 continue; 6021 if (_BITS(algo->minkey) < V_ipsec_esp_keymin) 6022 encmin = V_ipsec_esp_keymin; 6023 else 6024 encmin = _BITS(algo->minkey); 6025 6026 if (V_ipsec_esp_auth) 6027 m = key_getcomb_ah(); 6028 else { 6029 IPSEC_ASSERT(l <= MLEN, 6030 ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6031 MGET(m, M_NOWAIT, MT_DATA); 6032 if (m) { 6033 M_ALIGN(m, l); 6034 m->m_len = l; 6035 m->m_next = NULL; 6036 bzero(mtod(m, caddr_t), m->m_len); 6037 } 6038 } 6039 if (!m) 6040 goto fail; 6041 6042 totlen = 0; 6043 for (n = m; n; n = n->m_next) 6044 totlen += n->m_len; 6045 IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l)); 6046 6047 for (off = 0; off < totlen; off += l) { 6048 n = m_pulldown(m, off, l, &o); 6049 if (!n) { 6050 /* m is already freed */ 6051 goto fail; 6052 } 6053 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); 6054 bzero(comb, sizeof(*comb)); 6055 key_getcomb_setlifetime(comb); 6056 comb->sadb_comb_encrypt = i; 6057 comb->sadb_comb_encrypt_minbits = encmin; 6058 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6059 } 6060 6061 if (!result) 6062 result = m; 6063 else 6064 m_cat(result, m); 6065 } 6066 6067 return result; 6068 6069 fail: 6070 if (result) 6071 m_freem(result); 6072 return NULL; 6073 } 6074 6075 static void 6076 key_getsizes_ah( 6077 const struct auth_hash *ah, 6078 int alg, 6079 u_int16_t* min, 6080 u_int16_t* max) 6081 { 6082 6083 *min = *max = ah->keysize; 6084 if (ah->keysize == 0) { 6085 /* 6086 * Transform takes arbitrary key size but algorithm 6087 * key size is restricted. Enforce this here. 6088 */ 6089 switch (alg) { 6090 case SADB_X_AALG_MD5: *min = *max = 16; break; 6091 case SADB_X_AALG_SHA: *min = *max = 20; break; 6092 case SADB_X_AALG_NULL: *min = 1; *max = 256; break; 6093 case SADB_X_AALG_SHA2_256: *min = *max = 32; break; 6094 case SADB_X_AALG_SHA2_384: *min = *max = 48; break; 6095 case SADB_X_AALG_SHA2_512: *min = *max = 64; break; 6096 default: 6097 DPRINTF(("%s: unknown AH algorithm %u\n", 6098 __func__, alg)); 6099 break; 6100 } 6101 } 6102 } 6103 6104 /* 6105 * XXX reorder combinations by preference 6106 */ 6107 static struct mbuf * 6108 key_getcomb_ah() 6109 { 6110 struct sadb_comb *comb; 6111 struct auth_hash *algo; 6112 struct mbuf *m; 6113 u_int16_t minkeysize, maxkeysize; 6114 int i; 6115 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6116 6117 m = NULL; 6118 for (i = 1; i <= SADB_AALG_MAX; i++) { 6119 #if 1 6120 /* we prefer HMAC algorithms, not old algorithms */ 6121 if (i != SADB_AALG_SHA1HMAC && 6122 i != SADB_AALG_MD5HMAC && 6123 i != SADB_X_AALG_SHA2_256 && 6124 i != SADB_X_AALG_SHA2_384 && 6125 i != SADB_X_AALG_SHA2_512) 6126 continue; 6127 #endif 6128 algo = ah_algorithm_lookup(i); 6129 if (!algo) 6130 continue; 6131 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6132 /* discard algorithms with key size smaller than system min */ 6133 if (_BITS(minkeysize) < V_ipsec_ah_keymin) 6134 continue; 6135 6136 if (!m) { 6137 IPSEC_ASSERT(l <= MLEN, 6138 ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6139 MGET(m, M_NOWAIT, MT_DATA); 6140 if (m) { 6141 M_ALIGN(m, l); 6142 m->m_len = l; 6143 m->m_next = NULL; 6144 } 6145 } else 6146 M_PREPEND(m, l, M_NOWAIT); 6147 if (!m) 6148 return NULL; 6149 6150 comb = mtod(m, struct sadb_comb *); 6151 bzero(comb, sizeof(*comb)); 6152 key_getcomb_setlifetime(comb); 6153 comb->sadb_comb_auth = i; 6154 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6155 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6156 } 6157 6158 return m; 6159 } 6160 6161 /* 6162 * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 6163 * XXX reorder combinations by preference 6164 */ 6165 static struct mbuf * 6166 key_getcomb_ipcomp() 6167 { 6168 struct sadb_comb *comb; 6169 struct comp_algo *algo; 6170 struct mbuf *m; 6171 int i; 6172 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6173 6174 m = NULL; 6175 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6176 algo = ipcomp_algorithm_lookup(i); 6177 if (!algo) 6178 continue; 6179 6180 if (!m) { 6181 IPSEC_ASSERT(l <= MLEN, 6182 ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6183 MGET(m, M_NOWAIT, MT_DATA); 6184 if (m) { 6185 M_ALIGN(m, l); 6186 m->m_len = l; 6187 m->m_next = NULL; 6188 } 6189 } else 6190 M_PREPEND(m, l, M_NOWAIT); 6191 if (!m) 6192 return NULL; 6193 6194 comb = mtod(m, struct sadb_comb *); 6195 bzero(comb, sizeof(*comb)); 6196 key_getcomb_setlifetime(comb); 6197 comb->sadb_comb_encrypt = i; 6198 /* what should we set into sadb_comb_*_{min,max}bits? */ 6199 } 6200 6201 return m; 6202 } 6203 6204 /* 6205 * XXX no way to pass mode (transport/tunnel) to userland 6206 * XXX replay checking? 6207 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6208 */ 6209 static struct mbuf * 6210 key_getprop(saidx) 6211 const struct secasindex *saidx; 6212 { 6213 struct sadb_prop *prop; 6214 struct mbuf *m, *n; 6215 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6216 int totlen; 6217 6218 switch (saidx->proto) { 6219 case IPPROTO_ESP: 6220 m = key_getcomb_esp(); 6221 break; 6222 case IPPROTO_AH: 6223 m = key_getcomb_ah(); 6224 break; 6225 case IPPROTO_IPCOMP: 6226 m = key_getcomb_ipcomp(); 6227 break; 6228 default: 6229 return NULL; 6230 } 6231 6232 if (!m) 6233 return NULL; 6234 M_PREPEND(m, l, M_NOWAIT); 6235 if (!m) 6236 return NULL; 6237 6238 totlen = 0; 6239 for (n = m; n; n = n->m_next) 6240 totlen += n->m_len; 6241 6242 prop = mtod(m, struct sadb_prop *); 6243 bzero(prop, sizeof(*prop)); 6244 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6245 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6246 prop->sadb_prop_replay = 32; /* XXX */ 6247 6248 return m; 6249 } 6250 6251 /* 6252 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6253 * send 6254 * <base, SA, address(SD), (address(P)), x_policy, 6255 * (identity(SD),) (sensitivity,) proposal> 6256 * to KMD, and expect to receive 6257 * <base> with SADB_ACQUIRE if error occured, 6258 * or 6259 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6260 * from KMD by PF_KEY. 6261 * 6262 * XXX x_policy is outside of RFC2367 (KAME extension). 6263 * XXX sensitivity is not supported. 6264 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6265 * see comment for key_getcomb_ipcomp(). 6266 * 6267 * OUT: 6268 * 0 : succeed 6269 * others: error number 6270 */ 6271 static int 6272 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6273 { 6274 struct mbuf *result = NULL, *m; 6275 struct secacq *newacq; 6276 u_int8_t satype; 6277 int error = -1; 6278 u_int32_t seq; 6279 6280 IPSEC_ASSERT(saidx != NULL, ("null saidx")); 6281 satype = key_proto2satype(saidx->proto); 6282 IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto)); 6283 6284 /* 6285 * We never do anything about acquirng SA. There is anather 6286 * solution that kernel blocks to send SADB_ACQUIRE message until 6287 * getting something message from IKEd. In later case, to be 6288 * managed with ACQUIRING list. 6289 */ 6290 /* Get an entry to check whether sending message or not. */ 6291 if ((newacq = key_getacq(saidx)) != NULL) { 6292 if (V_key_blockacq_count < newacq->count) { 6293 /* reset counter and do send message. */ 6294 newacq->count = 0; 6295 } else { 6296 /* increment counter and do nothing. */ 6297 newacq->count++; 6298 return 0; 6299 } 6300 } else { 6301 /* make new entry for blocking to send SADB_ACQUIRE. */ 6302 if ((newacq = key_newacq(saidx)) == NULL) 6303 return ENOBUFS; 6304 } 6305 6306 6307 seq = newacq->seq; 6308 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6309 if (!m) { 6310 error = ENOBUFS; 6311 goto fail; 6312 } 6313 result = m; 6314 6315 /* 6316 * No SADB_X_EXT_NAT_T_* here: we do not know 6317 * anything related to NAT-T at this time. 6318 */ 6319 6320 /* set sadb_address for saidx's. */ 6321 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6322 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6323 if (!m) { 6324 error = ENOBUFS; 6325 goto fail; 6326 } 6327 m_cat(result, m); 6328 6329 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6330 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6331 if (!m) { 6332 error = ENOBUFS; 6333 goto fail; 6334 } 6335 m_cat(result, m); 6336 6337 /* XXX proxy address (optional) */ 6338 6339 /* set sadb_x_policy */ 6340 if (sp) { 6341 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6342 if (!m) { 6343 error = ENOBUFS; 6344 goto fail; 6345 } 6346 m_cat(result, m); 6347 } 6348 6349 /* XXX identity (optional) */ 6350 #if 0 6351 if (idexttype && fqdn) { 6352 /* create identity extension (FQDN) */ 6353 struct sadb_ident *id; 6354 int fqdnlen; 6355 6356 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6357 id = (struct sadb_ident *)p; 6358 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6359 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6360 id->sadb_ident_exttype = idexttype; 6361 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6362 bcopy(fqdn, id + 1, fqdnlen); 6363 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6364 } 6365 6366 if (idexttype) { 6367 /* create identity extension (USERFQDN) */ 6368 struct sadb_ident *id; 6369 int userfqdnlen; 6370 6371 if (userfqdn) { 6372 /* +1 for terminating-NUL */ 6373 userfqdnlen = strlen(userfqdn) + 1; 6374 } else 6375 userfqdnlen = 0; 6376 id = (struct sadb_ident *)p; 6377 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6378 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6379 id->sadb_ident_exttype = idexttype; 6380 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6381 /* XXX is it correct? */ 6382 if (curproc && curproc->p_cred) 6383 id->sadb_ident_id = curproc->p_cred->p_ruid; 6384 if (userfqdn && userfqdnlen) 6385 bcopy(userfqdn, id + 1, userfqdnlen); 6386 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6387 } 6388 #endif 6389 6390 /* XXX sensitivity (optional) */ 6391 6392 /* create proposal/combination extension */ 6393 m = key_getprop(saidx); 6394 #if 0 6395 /* 6396 * spec conformant: always attach proposal/combination extension, 6397 * the problem is that we have no way to attach it for ipcomp, 6398 * due to the way sadb_comb is declared in RFC2367. 6399 */ 6400 if (!m) { 6401 error = ENOBUFS; 6402 goto fail; 6403 } 6404 m_cat(result, m); 6405 #else 6406 /* 6407 * outside of spec; make proposal/combination extension optional. 6408 */ 6409 if (m) 6410 m_cat(result, m); 6411 #endif 6412 6413 if ((result->m_flags & M_PKTHDR) == 0) { 6414 error = EINVAL; 6415 goto fail; 6416 } 6417 6418 if (result->m_len < sizeof(struct sadb_msg)) { 6419 result = m_pullup(result, sizeof(struct sadb_msg)); 6420 if (result == NULL) { 6421 error = ENOBUFS; 6422 goto fail; 6423 } 6424 } 6425 6426 result->m_pkthdr.len = 0; 6427 for (m = result; m; m = m->m_next) 6428 result->m_pkthdr.len += m->m_len; 6429 6430 mtod(result, struct sadb_msg *)->sadb_msg_len = 6431 PFKEY_UNIT64(result->m_pkthdr.len); 6432 6433 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6434 6435 fail: 6436 if (result) 6437 m_freem(result); 6438 return error; 6439 } 6440 6441 static struct secacq * 6442 key_newacq(const struct secasindex *saidx) 6443 { 6444 struct secacq *newacq; 6445 6446 /* get new entry */ 6447 newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6448 if (newacq == NULL) { 6449 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6450 return NULL; 6451 } 6452 6453 /* copy secindex */ 6454 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 6455 newacq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq); 6456 newacq->created = time_second; 6457 newacq->count = 0; 6458 6459 /* add to acqtree */ 6460 ACQ_LOCK(); 6461 LIST_INSERT_HEAD(&V_acqtree, newacq, chain); 6462 ACQ_UNLOCK(); 6463 6464 return newacq; 6465 } 6466 6467 static struct secacq * 6468 key_getacq(const struct secasindex *saidx) 6469 { 6470 struct secacq *acq; 6471 6472 ACQ_LOCK(); 6473 LIST_FOREACH(acq, &V_acqtree, chain) { 6474 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6475 break; 6476 } 6477 ACQ_UNLOCK(); 6478 6479 return acq; 6480 } 6481 6482 static struct secacq * 6483 key_getacqbyseq(seq) 6484 u_int32_t seq; 6485 { 6486 struct secacq *acq; 6487 6488 ACQ_LOCK(); 6489 LIST_FOREACH(acq, &V_acqtree, chain) { 6490 if (acq->seq == seq) 6491 break; 6492 } 6493 ACQ_UNLOCK(); 6494 6495 return acq; 6496 } 6497 6498 static struct secspacq * 6499 key_newspacq(spidx) 6500 struct secpolicyindex *spidx; 6501 { 6502 struct secspacq *acq; 6503 6504 /* get new entry */ 6505 acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6506 if (acq == NULL) { 6507 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6508 return NULL; 6509 } 6510 6511 /* copy secindex */ 6512 bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 6513 acq->created = time_second; 6514 acq->count = 0; 6515 6516 /* add to spacqtree */ 6517 SPACQ_LOCK(); 6518 LIST_INSERT_HEAD(&V_spacqtree, acq, chain); 6519 SPACQ_UNLOCK(); 6520 6521 return acq; 6522 } 6523 6524 static struct secspacq * 6525 key_getspacq(spidx) 6526 struct secpolicyindex *spidx; 6527 { 6528 struct secspacq *acq; 6529 6530 SPACQ_LOCK(); 6531 LIST_FOREACH(acq, &V_spacqtree, chain) { 6532 if (key_cmpspidx_exactly(spidx, &acq->spidx)) { 6533 /* NB: return holding spacq_lock */ 6534 return acq; 6535 } 6536 } 6537 SPACQ_UNLOCK(); 6538 6539 return NULL; 6540 } 6541 6542 /* 6543 * SADB_ACQUIRE processing, 6544 * in first situation, is receiving 6545 * <base> 6546 * from the ikmpd, and clear sequence of its secasvar entry. 6547 * 6548 * In second situation, is receiving 6549 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6550 * from a user land process, and return 6551 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6552 * to the socket. 6553 * 6554 * m will always be freed. 6555 */ 6556 static int 6557 key_acquire2(so, m, mhp) 6558 struct socket *so; 6559 struct mbuf *m; 6560 const struct sadb_msghdr *mhp; 6561 { 6562 const struct sadb_address *src0, *dst0; 6563 struct secasindex saidx; 6564 struct secashead *sah; 6565 u_int16_t proto; 6566 int error; 6567 6568 IPSEC_ASSERT(so != NULL, ("null socket")); 6569 IPSEC_ASSERT(m != NULL, ("null mbuf")); 6570 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6571 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6572 6573 /* 6574 * Error message from KMd. 6575 * We assume that if error was occured in IKEd, the length of PFKEY 6576 * message is equal to the size of sadb_msg structure. 6577 * We do not raise error even if error occured in this function. 6578 */ 6579 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6580 struct secacq *acq; 6581 6582 /* check sequence number */ 6583 if (mhp->msg->sadb_msg_seq == 0) { 6584 ipseclog((LOG_DEBUG, "%s: must specify sequence " 6585 "number.\n", __func__)); 6586 m_freem(m); 6587 return 0; 6588 } 6589 6590 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6591 /* 6592 * the specified larval SA is already gone, or we got 6593 * a bogus sequence number. we can silently ignore it. 6594 */ 6595 m_freem(m); 6596 return 0; 6597 } 6598 6599 /* reset acq counter in order to deletion by timehander. */ 6600 acq->created = time_second; 6601 acq->count = 0; 6602 m_freem(m); 6603 return 0; 6604 } 6605 6606 /* 6607 * This message is from user land. 6608 */ 6609 6610 /* map satype to proto */ 6611 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6612 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6613 __func__)); 6614 return key_senderror(so, m, EINVAL); 6615 } 6616 6617 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6618 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6619 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6620 /* error */ 6621 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6622 __func__)); 6623 return key_senderror(so, m, EINVAL); 6624 } 6625 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6626 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6627 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6628 /* error */ 6629 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6630 __func__)); 6631 return key_senderror(so, m, EINVAL); 6632 } 6633 6634 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6635 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6636 6637 /* XXX boundary check against sa_len */ 6638 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6639 6640 /* 6641 * Make sure the port numbers are zero. 6642 * In case of NAT-T we will update them later if needed. 6643 */ 6644 KEY_PORTTOSADDR(&saidx.src, 0); 6645 KEY_PORTTOSADDR(&saidx.dst, 0); 6646 6647 #ifndef IPSEC_NAT_T 6648 /* 6649 * Handle NAT-T info if present. 6650 */ 6651 6652 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 6653 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 6654 struct sadb_x_nat_t_port *sport, *dport; 6655 6656 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 6657 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 6658 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 6659 __func__)); 6660 return key_senderror(so, m, EINVAL); 6661 } 6662 6663 sport = (struct sadb_x_nat_t_port *) 6664 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 6665 dport = (struct sadb_x_nat_t_port *) 6666 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 6667 6668 if (sport) 6669 KEY_PORTTOSADDR(&saidx.src, 6670 sport->sadb_x_nat_t_port_port); 6671 if (dport) 6672 KEY_PORTTOSADDR(&saidx.dst, 6673 dport->sadb_x_nat_t_port_port); 6674 } 6675 #endif 6676 6677 /* get a SA index */ 6678 SAHTREE_LOCK(); 6679 LIST_FOREACH(sah, &V_sahtree, chain) { 6680 if (sah->state == SADB_SASTATE_DEAD) 6681 continue; 6682 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6683 break; 6684 } 6685 SAHTREE_UNLOCK(); 6686 if (sah != NULL) { 6687 ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__)); 6688 return key_senderror(so, m, EEXIST); 6689 } 6690 6691 error = key_acquire(&saidx, NULL); 6692 if (error != 0) { 6693 ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 6694 __func__, mhp->msg->sadb_msg_errno)); 6695 return key_senderror(so, m, error); 6696 } 6697 6698 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6699 } 6700 6701 /* 6702 * SADB_REGISTER processing. 6703 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6704 * receive 6705 * <base> 6706 * from the ikmpd, and register a socket to send PF_KEY messages, 6707 * and send 6708 * <base, supported> 6709 * to KMD by PF_KEY. 6710 * If socket is detached, must free from regnode. 6711 * 6712 * m will always be freed. 6713 */ 6714 static int 6715 key_register(so, m, mhp) 6716 struct socket *so; 6717 struct mbuf *m; 6718 const struct sadb_msghdr *mhp; 6719 { 6720 struct secreg *reg, *newreg = 0; 6721 6722 IPSEC_ASSERT(so != NULL, ("null socket")); 6723 IPSEC_ASSERT(m != NULL, ("null mbuf")); 6724 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6725 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6726 6727 /* check for invalid register message */ 6728 if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0])) 6729 return key_senderror(so, m, EINVAL); 6730 6731 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6732 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6733 goto setmsg; 6734 6735 /* check whether existing or not */ 6736 REGTREE_LOCK(); 6737 LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) { 6738 if (reg->so == so) { 6739 REGTREE_UNLOCK(); 6740 ipseclog((LOG_DEBUG, "%s: socket exists already.\n", 6741 __func__)); 6742 return key_senderror(so, m, EEXIST); 6743 } 6744 } 6745 6746 /* create regnode */ 6747 newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO); 6748 if (newreg == NULL) { 6749 REGTREE_UNLOCK(); 6750 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6751 return key_senderror(so, m, ENOBUFS); 6752 } 6753 6754 newreg->so = so; 6755 ((struct keycb *)sotorawcb(so))->kp_registered++; 6756 6757 /* add regnode to regtree. */ 6758 LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain); 6759 REGTREE_UNLOCK(); 6760 6761 setmsg: 6762 { 6763 struct mbuf *n; 6764 struct sadb_msg *newmsg; 6765 struct sadb_supported *sup; 6766 u_int len, alen, elen; 6767 int off; 6768 int i; 6769 struct sadb_alg *alg; 6770 6771 /* create new sadb_msg to reply. */ 6772 alen = 0; 6773 for (i = 1; i <= SADB_AALG_MAX; i++) { 6774 if (ah_algorithm_lookup(i)) 6775 alen += sizeof(struct sadb_alg); 6776 } 6777 if (alen) 6778 alen += sizeof(struct sadb_supported); 6779 elen = 0; 6780 for (i = 1; i <= SADB_EALG_MAX; i++) { 6781 if (esp_algorithm_lookup(i)) 6782 elen += sizeof(struct sadb_alg); 6783 } 6784 if (elen) 6785 elen += sizeof(struct sadb_supported); 6786 6787 len = sizeof(struct sadb_msg) + alen + elen; 6788 6789 if (len > MCLBYTES) 6790 return key_senderror(so, m, ENOBUFS); 6791 6792 MGETHDR(n, M_NOWAIT, MT_DATA); 6793 if (len > MHLEN) { 6794 MCLGET(n, M_NOWAIT); 6795 if ((n->m_flags & M_EXT) == 0) { 6796 m_freem(n); 6797 n = NULL; 6798 } 6799 } 6800 if (!n) 6801 return key_senderror(so, m, ENOBUFS); 6802 6803 n->m_pkthdr.len = n->m_len = len; 6804 n->m_next = NULL; 6805 off = 0; 6806 6807 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 6808 newmsg = mtod(n, struct sadb_msg *); 6809 newmsg->sadb_msg_errno = 0; 6810 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6811 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6812 6813 /* for authentication algorithm */ 6814 if (alen) { 6815 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6816 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6817 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6818 off += PFKEY_ALIGN8(sizeof(*sup)); 6819 6820 for (i = 1; i <= SADB_AALG_MAX; i++) { 6821 struct auth_hash *aalgo; 6822 u_int16_t minkeysize, maxkeysize; 6823 6824 aalgo = ah_algorithm_lookup(i); 6825 if (!aalgo) 6826 continue; 6827 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6828 alg->sadb_alg_id = i; 6829 alg->sadb_alg_ivlen = 0; 6830 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6831 alg->sadb_alg_minbits = _BITS(minkeysize); 6832 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6833 off += PFKEY_ALIGN8(sizeof(*alg)); 6834 } 6835 } 6836 6837 /* for encryption algorithm */ 6838 if (elen) { 6839 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6840 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6841 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6842 off += PFKEY_ALIGN8(sizeof(*sup)); 6843 6844 for (i = 1; i <= SADB_EALG_MAX; i++) { 6845 struct enc_xform *ealgo; 6846 6847 ealgo = esp_algorithm_lookup(i); 6848 if (!ealgo) 6849 continue; 6850 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6851 alg->sadb_alg_id = i; 6852 alg->sadb_alg_ivlen = ealgo->blocksize; 6853 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6854 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6855 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6856 } 6857 } 6858 6859 IPSEC_ASSERT(off == len, 6860 ("length assumption failed (off %u len %u)", off, len)); 6861 6862 m_freem(m); 6863 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6864 } 6865 } 6866 6867 /* 6868 * free secreg entry registered. 6869 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6870 */ 6871 void 6872 key_freereg(struct socket *so) 6873 { 6874 struct secreg *reg; 6875 int i; 6876 6877 IPSEC_ASSERT(so != NULL, ("NULL so")); 6878 6879 /* 6880 * check whether existing or not. 6881 * check all type of SA, because there is a potential that 6882 * one socket is registered to multiple type of SA. 6883 */ 6884 REGTREE_LOCK(); 6885 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6886 LIST_FOREACH(reg, &V_regtree[i], chain) { 6887 if (reg->so == so && __LIST_CHAINED(reg)) { 6888 LIST_REMOVE(reg, chain); 6889 free(reg, M_IPSEC_SAR); 6890 break; 6891 } 6892 } 6893 } 6894 REGTREE_UNLOCK(); 6895 } 6896 6897 /* 6898 * SADB_EXPIRE processing 6899 * send 6900 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6901 * to KMD by PF_KEY. 6902 * NOTE: We send only soft lifetime extension. 6903 * 6904 * OUT: 0 : succeed 6905 * others : error number 6906 */ 6907 static int 6908 key_expire(struct secasvar *sav) 6909 { 6910 int satype; 6911 struct mbuf *result = NULL, *m; 6912 int len; 6913 int error = -1; 6914 struct sadb_lifetime *lt; 6915 6916 IPSEC_ASSERT (sav != NULL, ("null sav")); 6917 IPSEC_ASSERT (sav->sah != NULL, ("null sa header")); 6918 6919 /* set msg header */ 6920 satype = key_proto2satype(sav->sah->saidx.proto); 6921 IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype)); 6922 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6923 if (!m) { 6924 error = ENOBUFS; 6925 goto fail; 6926 } 6927 result = m; 6928 6929 /* create SA extension */ 6930 m = key_setsadbsa(sav); 6931 if (!m) { 6932 error = ENOBUFS; 6933 goto fail; 6934 } 6935 m_cat(result, m); 6936 6937 /* create SA extension */ 6938 m = key_setsadbxsa2(sav->sah->saidx.mode, 6939 sav->replay ? sav->replay->count : 0, 6940 sav->sah->saidx.reqid); 6941 if (!m) { 6942 error = ENOBUFS; 6943 goto fail; 6944 } 6945 m_cat(result, m); 6946 6947 /* create lifetime extension (current and soft) */ 6948 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6949 m = m_get2(len, M_NOWAIT, MT_DATA, 0); 6950 if (m == NULL) { 6951 error = ENOBUFS; 6952 goto fail; 6953 } 6954 m_align(m, len); 6955 m->m_len = len; 6956 bzero(mtod(m, caddr_t), len); 6957 lt = mtod(m, struct sadb_lifetime *); 6958 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6959 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6960 lt->sadb_lifetime_allocations = sav->lft_c->allocations; 6961 lt->sadb_lifetime_bytes = sav->lft_c->bytes; 6962 lt->sadb_lifetime_addtime = sav->lft_c->addtime; 6963 lt->sadb_lifetime_usetime = sav->lft_c->usetime; 6964 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 6965 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6966 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 6967 lt->sadb_lifetime_allocations = sav->lft_s->allocations; 6968 lt->sadb_lifetime_bytes = sav->lft_s->bytes; 6969 lt->sadb_lifetime_addtime = sav->lft_s->addtime; 6970 lt->sadb_lifetime_usetime = sav->lft_s->usetime; 6971 m_cat(result, m); 6972 6973 /* set sadb_address for source */ 6974 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6975 &sav->sah->saidx.src.sa, 6976 FULLMASK, IPSEC_ULPROTO_ANY); 6977 if (!m) { 6978 error = ENOBUFS; 6979 goto fail; 6980 } 6981 m_cat(result, m); 6982 6983 /* set sadb_address for destination */ 6984 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6985 &sav->sah->saidx.dst.sa, 6986 FULLMASK, IPSEC_ULPROTO_ANY); 6987 if (!m) { 6988 error = ENOBUFS; 6989 goto fail; 6990 } 6991 m_cat(result, m); 6992 6993 /* 6994 * XXX-BZ Handle NAT-T extensions here. 6995 */ 6996 6997 if ((result->m_flags & M_PKTHDR) == 0) { 6998 error = EINVAL; 6999 goto fail; 7000 } 7001 7002 if (result->m_len < sizeof(struct sadb_msg)) { 7003 result = m_pullup(result, sizeof(struct sadb_msg)); 7004 if (result == NULL) { 7005 error = ENOBUFS; 7006 goto fail; 7007 } 7008 } 7009 7010 result->m_pkthdr.len = 0; 7011 for (m = result; m; m = m->m_next) 7012 result->m_pkthdr.len += m->m_len; 7013 7014 mtod(result, struct sadb_msg *)->sadb_msg_len = 7015 PFKEY_UNIT64(result->m_pkthdr.len); 7016 7017 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 7018 7019 fail: 7020 if (result) 7021 m_freem(result); 7022 return error; 7023 } 7024 7025 /* 7026 * SADB_FLUSH processing 7027 * receive 7028 * <base> 7029 * from the ikmpd, and free all entries in secastree. 7030 * and send, 7031 * <base> 7032 * to the ikmpd. 7033 * NOTE: to do is only marking SADB_SASTATE_DEAD. 7034 * 7035 * m will always be freed. 7036 */ 7037 static int 7038 key_flush(so, m, mhp) 7039 struct socket *so; 7040 struct mbuf *m; 7041 const struct sadb_msghdr *mhp; 7042 { 7043 struct sadb_msg *newmsg; 7044 struct secashead *sah, *nextsah; 7045 struct secasvar *sav, *nextsav; 7046 u_int16_t proto; 7047 u_int8_t state; 7048 u_int stateidx; 7049 7050 IPSEC_ASSERT(so != NULL, ("null socket")); 7051 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7052 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7053 7054 /* map satype to proto */ 7055 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7056 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7057 __func__)); 7058 return key_senderror(so, m, EINVAL); 7059 } 7060 7061 /* no SATYPE specified, i.e. flushing all SA. */ 7062 SAHTREE_LOCK(); 7063 for (sah = LIST_FIRST(&V_sahtree); 7064 sah != NULL; 7065 sah = nextsah) { 7066 nextsah = LIST_NEXT(sah, chain); 7067 7068 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7069 && proto != sah->saidx.proto) 7070 continue; 7071 7072 for (stateidx = 0; 7073 stateidx < _ARRAYLEN(saorder_state_alive); 7074 stateidx++) { 7075 state = saorder_state_any[stateidx]; 7076 for (sav = LIST_FIRST(&sah->savtree[state]); 7077 sav != NULL; 7078 sav = nextsav) { 7079 7080 nextsav = LIST_NEXT(sav, chain); 7081 7082 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7083 KEY_FREESAV(&sav); 7084 } 7085 } 7086 7087 sah->state = SADB_SASTATE_DEAD; 7088 } 7089 SAHTREE_UNLOCK(); 7090 7091 if (m->m_len < sizeof(struct sadb_msg) || 7092 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7093 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 7094 return key_senderror(so, m, ENOBUFS); 7095 } 7096 7097 if (m->m_next) 7098 m_freem(m->m_next); 7099 m->m_next = NULL; 7100 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7101 newmsg = mtod(m, struct sadb_msg *); 7102 newmsg->sadb_msg_errno = 0; 7103 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7104 7105 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7106 } 7107 7108 /* 7109 * SADB_DUMP processing 7110 * dump all entries including status of DEAD in SAD. 7111 * receive 7112 * <base> 7113 * from the ikmpd, and dump all secasvar leaves 7114 * and send, 7115 * <base> ..... 7116 * to the ikmpd. 7117 * 7118 * m will always be freed. 7119 */ 7120 static int 7121 key_dump(so, m, mhp) 7122 struct socket *so; 7123 struct mbuf *m; 7124 const struct sadb_msghdr *mhp; 7125 { 7126 struct secashead *sah; 7127 struct secasvar *sav; 7128 u_int16_t proto; 7129 u_int stateidx; 7130 u_int8_t satype; 7131 u_int8_t state; 7132 int cnt; 7133 struct sadb_msg *newmsg; 7134 struct mbuf *n; 7135 7136 IPSEC_ASSERT(so != NULL, ("null socket")); 7137 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7138 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7139 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7140 7141 /* map satype to proto */ 7142 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7143 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7144 __func__)); 7145 return key_senderror(so, m, EINVAL); 7146 } 7147 7148 /* count sav entries to be sent to the userland. */ 7149 cnt = 0; 7150 SAHTREE_LOCK(); 7151 LIST_FOREACH(sah, &V_sahtree, chain) { 7152 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7153 && proto != sah->saidx.proto) 7154 continue; 7155 7156 for (stateidx = 0; 7157 stateidx < _ARRAYLEN(saorder_state_any); 7158 stateidx++) { 7159 state = saorder_state_any[stateidx]; 7160 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7161 cnt++; 7162 } 7163 } 7164 } 7165 7166 if (cnt == 0) { 7167 SAHTREE_UNLOCK(); 7168 return key_senderror(so, m, ENOENT); 7169 } 7170 7171 /* send this to the userland, one at a time. */ 7172 newmsg = NULL; 7173 LIST_FOREACH(sah, &V_sahtree, chain) { 7174 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7175 && proto != sah->saidx.proto) 7176 continue; 7177 7178 /* map proto to satype */ 7179 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7180 SAHTREE_UNLOCK(); 7181 ipseclog((LOG_DEBUG, "%s: there was invalid proto in " 7182 "SAD.\n", __func__)); 7183 return key_senderror(so, m, EINVAL); 7184 } 7185 7186 for (stateidx = 0; 7187 stateidx < _ARRAYLEN(saorder_state_any); 7188 stateidx++) { 7189 state = saorder_state_any[stateidx]; 7190 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7191 n = key_setdumpsa(sav, SADB_DUMP, satype, 7192 --cnt, mhp->msg->sadb_msg_pid); 7193 if (!n) { 7194 SAHTREE_UNLOCK(); 7195 return key_senderror(so, m, ENOBUFS); 7196 } 7197 key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 7198 } 7199 } 7200 } 7201 SAHTREE_UNLOCK(); 7202 7203 m_freem(m); 7204 return 0; 7205 } 7206 7207 /* 7208 * SADB_X_PROMISC processing 7209 * 7210 * m will always be freed. 7211 */ 7212 static int 7213 key_promisc(so, m, mhp) 7214 struct socket *so; 7215 struct mbuf *m; 7216 const struct sadb_msghdr *mhp; 7217 { 7218 int olen; 7219 7220 IPSEC_ASSERT(so != NULL, ("null socket")); 7221 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7222 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7223 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7224 7225 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7226 7227 if (olen < sizeof(struct sadb_msg)) { 7228 #if 1 7229 return key_senderror(so, m, EINVAL); 7230 #else 7231 m_freem(m); 7232 return 0; 7233 #endif 7234 } else if (olen == sizeof(struct sadb_msg)) { 7235 /* enable/disable promisc mode */ 7236 struct keycb *kp; 7237 7238 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7239 return key_senderror(so, m, EINVAL); 7240 mhp->msg->sadb_msg_errno = 0; 7241 switch (mhp->msg->sadb_msg_satype) { 7242 case 0: 7243 case 1: 7244 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7245 break; 7246 default: 7247 return key_senderror(so, m, EINVAL); 7248 } 7249 7250 /* send the original message back to everyone */ 7251 mhp->msg->sadb_msg_errno = 0; 7252 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7253 } else { 7254 /* send packet as is */ 7255 7256 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7257 7258 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7259 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7260 } 7261 } 7262 7263 static int (*key_typesw[]) __P((struct socket *, struct mbuf *, 7264 const struct sadb_msghdr *)) = { 7265 NULL, /* SADB_RESERVED */ 7266 key_getspi, /* SADB_GETSPI */ 7267 key_update, /* SADB_UPDATE */ 7268 key_add, /* SADB_ADD */ 7269 key_delete, /* SADB_DELETE */ 7270 key_get, /* SADB_GET */ 7271 key_acquire2, /* SADB_ACQUIRE */ 7272 key_register, /* SADB_REGISTER */ 7273 NULL, /* SADB_EXPIRE */ 7274 key_flush, /* SADB_FLUSH */ 7275 key_dump, /* SADB_DUMP */ 7276 key_promisc, /* SADB_X_PROMISC */ 7277 NULL, /* SADB_X_PCHANGE */ 7278 key_spdadd, /* SADB_X_SPDUPDATE */ 7279 key_spdadd, /* SADB_X_SPDADD */ 7280 key_spddelete, /* SADB_X_SPDDELETE */ 7281 key_spdget, /* SADB_X_SPDGET */ 7282 NULL, /* SADB_X_SPDACQUIRE */ 7283 key_spddump, /* SADB_X_SPDDUMP */ 7284 key_spdflush, /* SADB_X_SPDFLUSH */ 7285 key_spdadd, /* SADB_X_SPDSETIDX */ 7286 NULL, /* SADB_X_SPDEXPIRE */ 7287 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7288 }; 7289 7290 /* 7291 * parse sadb_msg buffer to process PFKEYv2, 7292 * and create a data to response if needed. 7293 * I think to be dealed with mbuf directly. 7294 * IN: 7295 * msgp : pointer to pointer to a received buffer pulluped. 7296 * This is rewrited to response. 7297 * so : pointer to socket. 7298 * OUT: 7299 * length for buffer to send to user process. 7300 */ 7301 int 7302 key_parse(m, so) 7303 struct mbuf *m; 7304 struct socket *so; 7305 { 7306 struct sadb_msg *msg; 7307 struct sadb_msghdr mh; 7308 u_int orglen; 7309 int error; 7310 int target; 7311 7312 IPSEC_ASSERT(so != NULL, ("null socket")); 7313 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7314 7315 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7316 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7317 ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__)); 7318 kdebug_sadb(msg)); 7319 #endif 7320 7321 if (m->m_len < sizeof(struct sadb_msg)) { 7322 m = m_pullup(m, sizeof(struct sadb_msg)); 7323 if (!m) 7324 return ENOBUFS; 7325 } 7326 msg = mtod(m, struct sadb_msg *); 7327 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7328 target = KEY_SENDUP_ONE; 7329 7330 if ((m->m_flags & M_PKTHDR) == 0 || 7331 m->m_pkthdr.len != m->m_pkthdr.len) { 7332 ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__)); 7333 PFKEYSTAT_INC(out_invlen); 7334 error = EINVAL; 7335 goto senderror; 7336 } 7337 7338 if (msg->sadb_msg_version != PF_KEY_V2) { 7339 ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n", 7340 __func__, msg->sadb_msg_version)); 7341 PFKEYSTAT_INC(out_invver); 7342 error = EINVAL; 7343 goto senderror; 7344 } 7345 7346 if (msg->sadb_msg_type > SADB_MAX) { 7347 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7348 __func__, msg->sadb_msg_type)); 7349 PFKEYSTAT_INC(out_invmsgtype); 7350 error = EINVAL; 7351 goto senderror; 7352 } 7353 7354 /* for old-fashioned code - should be nuked */ 7355 if (m->m_pkthdr.len > MCLBYTES) { 7356 m_freem(m); 7357 return ENOBUFS; 7358 } 7359 if (m->m_next) { 7360 struct mbuf *n; 7361 7362 MGETHDR(n, M_NOWAIT, MT_DATA); 7363 if (n && m->m_pkthdr.len > MHLEN) { 7364 MCLGET(n, M_NOWAIT); 7365 if ((n->m_flags & M_EXT) == 0) { 7366 m_free(n); 7367 n = NULL; 7368 } 7369 } 7370 if (!n) { 7371 m_freem(m); 7372 return ENOBUFS; 7373 } 7374 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); 7375 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7376 n->m_next = NULL; 7377 m_freem(m); 7378 m = n; 7379 } 7380 7381 /* align the mbuf chain so that extensions are in contiguous region. */ 7382 error = key_align(m, &mh); 7383 if (error) 7384 return error; 7385 7386 msg = mh.msg; 7387 7388 /* check SA type */ 7389 switch (msg->sadb_msg_satype) { 7390 case SADB_SATYPE_UNSPEC: 7391 switch (msg->sadb_msg_type) { 7392 case SADB_GETSPI: 7393 case SADB_UPDATE: 7394 case SADB_ADD: 7395 case SADB_DELETE: 7396 case SADB_GET: 7397 case SADB_ACQUIRE: 7398 case SADB_EXPIRE: 7399 ipseclog((LOG_DEBUG, "%s: must specify satype " 7400 "when msg type=%u.\n", __func__, 7401 msg->sadb_msg_type)); 7402 PFKEYSTAT_INC(out_invsatype); 7403 error = EINVAL; 7404 goto senderror; 7405 } 7406 break; 7407 case SADB_SATYPE_AH: 7408 case SADB_SATYPE_ESP: 7409 case SADB_X_SATYPE_IPCOMP: 7410 case SADB_X_SATYPE_TCPSIGNATURE: 7411 switch (msg->sadb_msg_type) { 7412 case SADB_X_SPDADD: 7413 case SADB_X_SPDDELETE: 7414 case SADB_X_SPDGET: 7415 case SADB_X_SPDDUMP: 7416 case SADB_X_SPDFLUSH: 7417 case SADB_X_SPDSETIDX: 7418 case SADB_X_SPDUPDATE: 7419 case SADB_X_SPDDELETE2: 7420 ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", 7421 __func__, msg->sadb_msg_type)); 7422 PFKEYSTAT_INC(out_invsatype); 7423 error = EINVAL; 7424 goto senderror; 7425 } 7426 break; 7427 case SADB_SATYPE_RSVP: 7428 case SADB_SATYPE_OSPFV2: 7429 case SADB_SATYPE_RIPV2: 7430 case SADB_SATYPE_MIP: 7431 ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n", 7432 __func__, msg->sadb_msg_satype)); 7433 PFKEYSTAT_INC(out_invsatype); 7434 error = EOPNOTSUPP; 7435 goto senderror; 7436 case 1: /* XXX: What does it do? */ 7437 if (msg->sadb_msg_type == SADB_X_PROMISC) 7438 break; 7439 /*FALLTHROUGH*/ 7440 default: 7441 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7442 __func__, msg->sadb_msg_satype)); 7443 PFKEYSTAT_INC(out_invsatype); 7444 error = EINVAL; 7445 goto senderror; 7446 } 7447 7448 /* check field of upper layer protocol and address family */ 7449 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7450 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7451 struct sadb_address *src0, *dst0; 7452 u_int plen; 7453 7454 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7455 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7456 7457 /* check upper layer protocol */ 7458 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7459 ipseclog((LOG_DEBUG, "%s: upper layer protocol " 7460 "mismatched.\n", __func__)); 7461 PFKEYSTAT_INC(out_invaddr); 7462 error = EINVAL; 7463 goto senderror; 7464 } 7465 7466 /* check family */ 7467 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7468 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7469 ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 7470 __func__)); 7471 PFKEYSTAT_INC(out_invaddr); 7472 error = EINVAL; 7473 goto senderror; 7474 } 7475 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7476 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7477 ipseclog((LOG_DEBUG, "%s: address struct size " 7478 "mismatched.\n", __func__)); 7479 PFKEYSTAT_INC(out_invaddr); 7480 error = EINVAL; 7481 goto senderror; 7482 } 7483 7484 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7485 case AF_INET: 7486 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7487 sizeof(struct sockaddr_in)) { 7488 PFKEYSTAT_INC(out_invaddr); 7489 error = EINVAL; 7490 goto senderror; 7491 } 7492 break; 7493 case AF_INET6: 7494 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7495 sizeof(struct sockaddr_in6)) { 7496 PFKEYSTAT_INC(out_invaddr); 7497 error = EINVAL; 7498 goto senderror; 7499 } 7500 break; 7501 default: 7502 ipseclog((LOG_DEBUG, "%s: unsupported address family\n", 7503 __func__)); 7504 PFKEYSTAT_INC(out_invaddr); 7505 error = EAFNOSUPPORT; 7506 goto senderror; 7507 } 7508 7509 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7510 case AF_INET: 7511 plen = sizeof(struct in_addr) << 3; 7512 break; 7513 case AF_INET6: 7514 plen = sizeof(struct in6_addr) << 3; 7515 break; 7516 default: 7517 plen = 0; /*fool gcc*/ 7518 break; 7519 } 7520 7521 /* check max prefix length */ 7522 if (src0->sadb_address_prefixlen > plen || 7523 dst0->sadb_address_prefixlen > plen) { 7524 ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n", 7525 __func__)); 7526 PFKEYSTAT_INC(out_invaddr); 7527 error = EINVAL; 7528 goto senderror; 7529 } 7530 7531 /* 7532 * prefixlen == 0 is valid because there can be a case when 7533 * all addresses are matched. 7534 */ 7535 } 7536 7537 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7538 key_typesw[msg->sadb_msg_type] == NULL) { 7539 PFKEYSTAT_INC(out_invmsgtype); 7540 error = EINVAL; 7541 goto senderror; 7542 } 7543 7544 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7545 7546 senderror: 7547 msg->sadb_msg_errno = error; 7548 return key_sendup_mbuf(so, m, target); 7549 } 7550 7551 static int 7552 key_senderror(so, m, code) 7553 struct socket *so; 7554 struct mbuf *m; 7555 int code; 7556 { 7557 struct sadb_msg *msg; 7558 7559 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7560 ("mbuf too small, len %u", m->m_len)); 7561 7562 msg = mtod(m, struct sadb_msg *); 7563 msg->sadb_msg_errno = code; 7564 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7565 } 7566 7567 /* 7568 * set the pointer to each header into message buffer. 7569 * m will be freed on error. 7570 * XXX larger-than-MCLBYTES extension? 7571 */ 7572 static int 7573 key_align(m, mhp) 7574 struct mbuf *m; 7575 struct sadb_msghdr *mhp; 7576 { 7577 struct mbuf *n; 7578 struct sadb_ext *ext; 7579 size_t off, end; 7580 int extlen; 7581 int toff; 7582 7583 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7584 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7585 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7586 ("mbuf too small, len %u", m->m_len)); 7587 7588 /* initialize */ 7589 bzero(mhp, sizeof(*mhp)); 7590 7591 mhp->msg = mtod(m, struct sadb_msg *); 7592 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7593 7594 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7595 extlen = end; /*just in case extlen is not updated*/ 7596 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7597 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7598 if (!n) { 7599 /* m is already freed */ 7600 return ENOBUFS; 7601 } 7602 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7603 7604 /* set pointer */ 7605 switch (ext->sadb_ext_type) { 7606 case SADB_EXT_SA: 7607 case SADB_EXT_ADDRESS_SRC: 7608 case SADB_EXT_ADDRESS_DST: 7609 case SADB_EXT_ADDRESS_PROXY: 7610 case SADB_EXT_LIFETIME_CURRENT: 7611 case SADB_EXT_LIFETIME_HARD: 7612 case SADB_EXT_LIFETIME_SOFT: 7613 case SADB_EXT_KEY_AUTH: 7614 case SADB_EXT_KEY_ENCRYPT: 7615 case SADB_EXT_IDENTITY_SRC: 7616 case SADB_EXT_IDENTITY_DST: 7617 case SADB_EXT_SENSITIVITY: 7618 case SADB_EXT_PROPOSAL: 7619 case SADB_EXT_SUPPORTED_AUTH: 7620 case SADB_EXT_SUPPORTED_ENCRYPT: 7621 case SADB_EXT_SPIRANGE: 7622 case SADB_X_EXT_POLICY: 7623 case SADB_X_EXT_SA2: 7624 #ifdef IPSEC_NAT_T 7625 case SADB_X_EXT_NAT_T_TYPE: 7626 case SADB_X_EXT_NAT_T_SPORT: 7627 case SADB_X_EXT_NAT_T_DPORT: 7628 case SADB_X_EXT_NAT_T_OAI: 7629 case SADB_X_EXT_NAT_T_OAR: 7630 case SADB_X_EXT_NAT_T_FRAG: 7631 #endif 7632 /* duplicate check */ 7633 /* 7634 * XXX Are there duplication payloads of either 7635 * KEY_AUTH or KEY_ENCRYPT ? 7636 */ 7637 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7638 ipseclog((LOG_DEBUG, "%s: duplicate ext_type " 7639 "%u\n", __func__, ext->sadb_ext_type)); 7640 m_freem(m); 7641 PFKEYSTAT_INC(out_dupext); 7642 return EINVAL; 7643 } 7644 break; 7645 default: 7646 ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n", 7647 __func__, ext->sadb_ext_type)); 7648 m_freem(m); 7649 PFKEYSTAT_INC(out_invexttype); 7650 return EINVAL; 7651 } 7652 7653 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7654 7655 if (key_validate_ext(ext, extlen)) { 7656 m_freem(m); 7657 PFKEYSTAT_INC(out_invlen); 7658 return EINVAL; 7659 } 7660 7661 n = m_pulldown(m, off, extlen, &toff); 7662 if (!n) { 7663 /* m is already freed */ 7664 return ENOBUFS; 7665 } 7666 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7667 7668 mhp->ext[ext->sadb_ext_type] = ext; 7669 mhp->extoff[ext->sadb_ext_type] = off; 7670 mhp->extlen[ext->sadb_ext_type] = extlen; 7671 } 7672 7673 if (off != end) { 7674 m_freem(m); 7675 PFKEYSTAT_INC(out_invlen); 7676 return EINVAL; 7677 } 7678 7679 return 0; 7680 } 7681 7682 static int 7683 key_validate_ext(ext, len) 7684 const struct sadb_ext *ext; 7685 int len; 7686 { 7687 const struct sockaddr *sa; 7688 enum { NONE, ADDR } checktype = NONE; 7689 int baselen = 0; 7690 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7691 7692 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7693 return EINVAL; 7694 7695 /* if it does not match minimum/maximum length, bail */ 7696 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7697 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7698 return EINVAL; 7699 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7700 return EINVAL; 7701 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7702 return EINVAL; 7703 7704 /* more checks based on sadb_ext_type XXX need more */ 7705 switch (ext->sadb_ext_type) { 7706 case SADB_EXT_ADDRESS_SRC: 7707 case SADB_EXT_ADDRESS_DST: 7708 case SADB_EXT_ADDRESS_PROXY: 7709 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7710 checktype = ADDR; 7711 break; 7712 case SADB_EXT_IDENTITY_SRC: 7713 case SADB_EXT_IDENTITY_DST: 7714 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7715 SADB_X_IDENTTYPE_ADDR) { 7716 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7717 checktype = ADDR; 7718 } else 7719 checktype = NONE; 7720 break; 7721 default: 7722 checktype = NONE; 7723 break; 7724 } 7725 7726 switch (checktype) { 7727 case NONE: 7728 break; 7729 case ADDR: 7730 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7731 if (len < baselen + sal) 7732 return EINVAL; 7733 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7734 return EINVAL; 7735 break; 7736 } 7737 7738 return 0; 7739 } 7740 7741 void 7742 key_init(void) 7743 { 7744 int i; 7745 7746 for (i = 0; i < IPSEC_DIR_MAX; i++) 7747 LIST_INIT(&V_sptree[i]); 7748 7749 LIST_INIT(&V_sahtree); 7750 7751 for (i = 0; i <= SADB_SATYPE_MAX; i++) 7752 LIST_INIT(&V_regtree[i]); 7753 7754 LIST_INIT(&V_acqtree); 7755 LIST_INIT(&V_spacqtree); 7756 7757 /* system default */ 7758 V_ip4_def_policy.policy = IPSEC_POLICY_NONE; 7759 V_ip4_def_policy.refcnt++; /*never reclaim this*/ 7760 7761 if (!IS_DEFAULT_VNET(curvnet)) 7762 return; 7763 7764 SPTREE_LOCK_INIT(); 7765 REGTREE_LOCK_INIT(); 7766 SAHTREE_LOCK_INIT(); 7767 ACQ_LOCK_INIT(); 7768 SPACQ_LOCK_INIT(); 7769 7770 #ifndef IPSEC_DEBUG2 7771 timeout((void *)key_timehandler, (void *)0, hz); 7772 #endif /*IPSEC_DEBUG2*/ 7773 7774 /* initialize key statistics */ 7775 keystat.getspi_count = 1; 7776 7777 printf("IPsec: Initialized Security Association Processing.\n"); 7778 } 7779 7780 #ifdef VIMAGE 7781 void 7782 key_destroy(void) 7783 { 7784 struct secpolicy *sp, *nextsp; 7785 struct secacq *acq, *nextacq; 7786 struct secspacq *spacq, *nextspacq; 7787 struct secashead *sah, *nextsah; 7788 struct secreg *reg; 7789 int i; 7790 7791 SPTREE_LOCK(); 7792 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7793 for (sp = LIST_FIRST(&V_sptree[i]); 7794 sp != NULL; sp = nextsp) { 7795 nextsp = LIST_NEXT(sp, chain); 7796 if (__LIST_CHAINED(sp)) { 7797 LIST_REMOVE(sp, chain); 7798 free(sp, M_IPSEC_SP); 7799 } 7800 } 7801 } 7802 SPTREE_UNLOCK(); 7803 7804 SAHTREE_LOCK(); 7805 for (sah = LIST_FIRST(&V_sahtree); sah != NULL; sah = nextsah) { 7806 nextsah = LIST_NEXT(sah, chain); 7807 if (__LIST_CHAINED(sah)) { 7808 LIST_REMOVE(sah, chain); 7809 free(sah, M_IPSEC_SAH); 7810 } 7811 } 7812 SAHTREE_UNLOCK(); 7813 7814 REGTREE_LOCK(); 7815 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7816 LIST_FOREACH(reg, &V_regtree[i], chain) { 7817 if (__LIST_CHAINED(reg)) { 7818 LIST_REMOVE(reg, chain); 7819 free(reg, M_IPSEC_SAR); 7820 break; 7821 } 7822 } 7823 } 7824 REGTREE_UNLOCK(); 7825 7826 ACQ_LOCK(); 7827 for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 7828 nextacq = LIST_NEXT(acq, chain); 7829 if (__LIST_CHAINED(acq)) { 7830 LIST_REMOVE(acq, chain); 7831 free(acq, M_IPSEC_SAQ); 7832 } 7833 } 7834 ACQ_UNLOCK(); 7835 7836 SPACQ_LOCK(); 7837 for (spacq = LIST_FIRST(&V_spacqtree); spacq != NULL; 7838 spacq = nextspacq) { 7839 nextspacq = LIST_NEXT(spacq, chain); 7840 if (__LIST_CHAINED(spacq)) { 7841 LIST_REMOVE(spacq, chain); 7842 free(spacq, M_IPSEC_SAQ); 7843 } 7844 } 7845 SPACQ_UNLOCK(); 7846 } 7847 #endif 7848 7849 /* 7850 * XXX: maybe This function is called after INBOUND IPsec processing. 7851 * 7852 * Special check for tunnel-mode packets. 7853 * We must make some checks for consistency between inner and outer IP header. 7854 * 7855 * xxx more checks to be provided 7856 */ 7857 int 7858 key_checktunnelsanity(sav, family, src, dst) 7859 struct secasvar *sav; 7860 u_int family; 7861 caddr_t src; 7862 caddr_t dst; 7863 { 7864 IPSEC_ASSERT(sav->sah != NULL, ("null SA header")); 7865 7866 /* XXX: check inner IP header */ 7867 7868 return 1; 7869 } 7870 7871 /* record data transfer on SA, and update timestamps */ 7872 void 7873 key_sa_recordxfer(sav, m) 7874 struct secasvar *sav; 7875 struct mbuf *m; 7876 { 7877 IPSEC_ASSERT(sav != NULL, ("Null secasvar")); 7878 IPSEC_ASSERT(m != NULL, ("Null mbuf")); 7879 if (!sav->lft_c) 7880 return; 7881 7882 /* 7883 * XXX Currently, there is a difference of bytes size 7884 * between inbound and outbound processing. 7885 */ 7886 sav->lft_c->bytes += m->m_pkthdr.len; 7887 /* to check bytes lifetime is done in key_timehandler(). */ 7888 7889 /* 7890 * We use the number of packets as the unit of 7891 * allocations. We increment the variable 7892 * whenever {esp,ah}_{in,out}put is called. 7893 */ 7894 sav->lft_c->allocations++; 7895 /* XXX check for expires? */ 7896 7897 /* 7898 * NOTE: We record CURRENT usetime by using wall clock, 7899 * in seconds. HARD and SOFT lifetime are measured by the time 7900 * difference (again in seconds) from usetime. 7901 * 7902 * usetime 7903 * v expire expire 7904 * -----+-----+--------+---> t 7905 * <--------------> HARD 7906 * <-----> SOFT 7907 */ 7908 sav->lft_c->usetime = time_second; 7909 /* XXX check for expires? */ 7910 7911 return; 7912 } 7913 7914 /* dumb version */ 7915 void 7916 key_sa_routechange(dst) 7917 struct sockaddr *dst; 7918 { 7919 struct secashead *sah; 7920 struct route *ro; 7921 7922 SAHTREE_LOCK(); 7923 LIST_FOREACH(sah, &V_sahtree, chain) { 7924 ro = &sah->route_cache.sa_route; 7925 if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len 7926 && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { 7927 RTFREE(ro->ro_rt); 7928 ro->ro_rt = (struct rtentry *)NULL; 7929 } 7930 } 7931 SAHTREE_UNLOCK(); 7932 } 7933 7934 static void 7935 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7936 { 7937 IPSEC_ASSERT(sav != NULL, ("NULL sav")); 7938 SAHTREE_LOCK_ASSERT(); 7939 7940 if (sav->state != state) { 7941 if (__LIST_CHAINED(sav)) 7942 LIST_REMOVE(sav, chain); 7943 sav->state = state; 7944 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7945 } 7946 } 7947 7948 void 7949 key_sa_stir_iv(sav) 7950 struct secasvar *sav; 7951 { 7952 7953 IPSEC_ASSERT(sav->iv != NULL, ("null IV")); 7954 key_randomfill(sav->iv, sav->ivlen); 7955 } 7956 7957 /* 7958 * Take one of the kernel's security keys and convert it into a PF_KEY 7959 * structure within an mbuf, suitable for sending up to a waiting 7960 * application in user land. 7961 * 7962 * IN: 7963 * src: A pointer to a kernel security key. 7964 * exttype: Which type of key this is. Refer to the PF_KEY data structures. 7965 * OUT: 7966 * a valid mbuf or NULL indicating an error 7967 * 7968 */ 7969 7970 static struct mbuf * 7971 key_setkey(struct seckey *src, u_int16_t exttype) 7972 { 7973 struct mbuf *m; 7974 struct sadb_key *p; 7975 int len; 7976 7977 if (src == NULL) 7978 return NULL; 7979 7980 len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src)); 7981 m = m_get2(len, M_NOWAIT, MT_DATA, 0); 7982 if (m == NULL) 7983 return NULL; 7984 m_align(m, len); 7985 m->m_len = len; 7986 p = mtod(m, struct sadb_key *); 7987 bzero(p, len); 7988 p->sadb_key_len = PFKEY_UNIT64(len); 7989 p->sadb_key_exttype = exttype; 7990 p->sadb_key_bits = src->bits; 7991 bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src)); 7992 7993 return m; 7994 } 7995 7996 /* 7997 * Take one of the kernel's lifetime data structures and convert it 7998 * into a PF_KEY structure within an mbuf, suitable for sending up to 7999 * a waiting application in user land. 8000 * 8001 * IN: 8002 * src: A pointer to a kernel lifetime structure. 8003 * exttype: Which type of lifetime this is. Refer to the PF_KEY 8004 * data structures for more information. 8005 * OUT: 8006 * a valid mbuf or NULL indicating an error 8007 * 8008 */ 8009 8010 static struct mbuf * 8011 key_setlifetime(struct seclifetime *src, u_int16_t exttype) 8012 { 8013 struct mbuf *m = NULL; 8014 struct sadb_lifetime *p; 8015 int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime)); 8016 8017 if (src == NULL) 8018 return NULL; 8019 8020 m = m_get2(len, M_NOWAIT, MT_DATA, 0); 8021 if (m == NULL) 8022 return m; 8023 m_align(m, len); 8024 m->m_len = len; 8025 p = mtod(m, struct sadb_lifetime *); 8026 8027 bzero(p, len); 8028 p->sadb_lifetime_len = PFKEY_UNIT64(len); 8029 p->sadb_lifetime_exttype = exttype; 8030 p->sadb_lifetime_allocations = src->allocations; 8031 p->sadb_lifetime_bytes = src->bytes; 8032 p->sadb_lifetime_addtime = src->addtime; 8033 p->sadb_lifetime_usetime = src->usetime; 8034 8035 return m; 8036 8037 }
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