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sys/netipsec/key.c
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1 /* $FreeBSD: releng/8.3/sys/netipsec/key.c 226392 2011-10-15 13:03:25Z brueffer $ */ 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 #ifdef INET 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 static struct mbuf *key_alloc_mbuf __P((int)); 551 552 static __inline void 553 sa_initref(struct secasvar *sav) 554 { 555 556 refcount_init(&sav->refcnt, 1); 557 } 558 static __inline void 559 sa_addref(struct secasvar *sav) 560 { 561 562 refcount_acquire(&sav->refcnt); 563 IPSEC_ASSERT(sav->refcnt != 0, ("SA refcnt overflow")); 564 } 565 static __inline int 566 sa_delref(struct secasvar *sav) 567 { 568 569 IPSEC_ASSERT(sav->refcnt > 0, ("SA refcnt underflow")); 570 return (refcount_release(&sav->refcnt)); 571 } 572 573 #define SP_ADDREF(p) do { \ 574 (p)->refcnt++; \ 575 IPSEC_ASSERT((p)->refcnt != 0, ("SP refcnt overflow")); \ 576 } while (0) 577 #define SP_DELREF(p) do { \ 578 IPSEC_ASSERT((p)->refcnt > 0, ("SP refcnt underflow")); \ 579 (p)->refcnt--; \ 580 } while (0) 581 582 583 /* 584 * Update the refcnt while holding the SPTREE lock. 585 */ 586 void 587 key_addref(struct secpolicy *sp) 588 { 589 SPTREE_LOCK(); 590 SP_ADDREF(sp); 591 SPTREE_UNLOCK(); 592 } 593 594 /* 595 * Return 0 when there are known to be no SP's for the specified 596 * direction. Otherwise return 1. This is used by IPsec code 597 * to optimize performance. 598 */ 599 int 600 key_havesp(u_int dir) 601 { 602 603 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 604 LIST_FIRST(&V_sptree[dir]) != NULL : 1); 605 } 606 607 /* %%% IPsec policy management */ 608 /* 609 * allocating a SP for OUTBOUND or INBOUND packet. 610 * Must call key_freesp() later. 611 * OUT: NULL: not found 612 * others: found and return the pointer. 613 */ 614 struct secpolicy * 615 key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 616 { 617 struct secpolicy *sp; 618 619 IPSEC_ASSERT(spidx != NULL, ("null spidx")); 620 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 621 ("invalid direction %u", dir)); 622 623 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 624 printf("DP %s from %s:%u\n", __func__, where, tag)); 625 626 /* get a SP entry */ 627 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 628 printf("*** objects\n"); 629 kdebug_secpolicyindex(spidx)); 630 631 SPTREE_LOCK(); 632 LIST_FOREACH(sp, &V_sptree[dir], chain) { 633 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 634 printf("*** in SPD\n"); 635 kdebug_secpolicyindex(&sp->spidx)); 636 637 if (sp->state == IPSEC_SPSTATE_DEAD) 638 continue; 639 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 640 goto found; 641 } 642 sp = NULL; 643 found: 644 if (sp) { 645 /* sanity check */ 646 KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 647 648 /* found a SPD entry */ 649 sp->lastused = time_second; 650 SP_ADDREF(sp); 651 } 652 SPTREE_UNLOCK(); 653 654 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 655 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 656 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 657 return sp; 658 } 659 660 /* 661 * allocating a SP for OUTBOUND or INBOUND packet. 662 * Must call key_freesp() later. 663 * OUT: NULL: not found 664 * others: found and return the pointer. 665 */ 666 struct secpolicy * 667 key_allocsp2(u_int32_t spi, 668 union sockaddr_union *dst, 669 u_int8_t proto, 670 u_int dir, 671 const char* where, int tag) 672 { 673 struct secpolicy *sp; 674 675 IPSEC_ASSERT(dst != NULL, ("null dst")); 676 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 677 ("invalid direction %u", dir)); 678 679 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 680 printf("DP %s from %s:%u\n", __func__, where, tag)); 681 682 /* get a SP entry */ 683 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 684 printf("*** objects\n"); 685 printf("spi %u proto %u dir %u\n", spi, proto, dir); 686 kdebug_sockaddr(&dst->sa)); 687 688 SPTREE_LOCK(); 689 LIST_FOREACH(sp, &V_sptree[dir], chain) { 690 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 691 printf("*** in SPD\n"); 692 kdebug_secpolicyindex(&sp->spidx)); 693 694 if (sp->state == IPSEC_SPSTATE_DEAD) 695 continue; 696 /* compare simple values, then dst address */ 697 if (sp->spidx.ul_proto != proto) 698 continue; 699 /* NB: spi's must exist and match */ 700 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 701 continue; 702 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 703 goto found; 704 } 705 sp = NULL; 706 found: 707 if (sp) { 708 /* sanity check */ 709 KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 710 711 /* found a SPD entry */ 712 sp->lastused = time_second; 713 SP_ADDREF(sp); 714 } 715 SPTREE_UNLOCK(); 716 717 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 718 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 719 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 720 return sp; 721 } 722 723 #if 0 724 /* 725 * return a policy that matches this particular inbound packet. 726 * XXX slow 727 */ 728 struct secpolicy * 729 key_gettunnel(const struct sockaddr *osrc, 730 const struct sockaddr *odst, 731 const struct sockaddr *isrc, 732 const struct sockaddr *idst, 733 const char* where, int tag) 734 { 735 struct secpolicy *sp; 736 const int dir = IPSEC_DIR_INBOUND; 737 struct ipsecrequest *r1, *r2, *p; 738 struct secpolicyindex spidx; 739 740 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 741 printf("DP %s from %s:%u\n", __func__, where, tag)); 742 743 if (isrc->sa_family != idst->sa_family) { 744 ipseclog((LOG_ERR, "%s: protocol family mismatched %d != %d\n.", 745 __func__, isrc->sa_family, idst->sa_family)); 746 sp = NULL; 747 goto done; 748 } 749 750 SPTREE_LOCK(); 751 LIST_FOREACH(sp, &V_sptree[dir], chain) { 752 if (sp->state == IPSEC_SPSTATE_DEAD) 753 continue; 754 755 r1 = r2 = NULL; 756 for (p = sp->req; p; p = p->next) { 757 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 758 continue; 759 760 r1 = r2; 761 r2 = p; 762 763 if (!r1) { 764 /* here we look at address matches only */ 765 spidx = sp->spidx; 766 if (isrc->sa_len > sizeof(spidx.src) || 767 idst->sa_len > sizeof(spidx.dst)) 768 continue; 769 bcopy(isrc, &spidx.src, isrc->sa_len); 770 bcopy(idst, &spidx.dst, idst->sa_len); 771 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 772 continue; 773 } else { 774 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 775 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 776 continue; 777 } 778 779 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 780 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 781 continue; 782 783 goto found; 784 } 785 } 786 sp = NULL; 787 found: 788 if (sp) { 789 sp->lastused = time_second; 790 SP_ADDREF(sp); 791 } 792 SPTREE_UNLOCK(); 793 done: 794 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 795 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 796 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 797 return sp; 798 } 799 #endif 800 801 /* 802 * allocating an SA entry for an *OUTBOUND* packet. 803 * checking each request entries in SP, and acquire an SA if need. 804 * OUT: 0: there are valid requests. 805 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 806 */ 807 int 808 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 809 { 810 u_int level; 811 int error; 812 struct secasvar *sav; 813 814 IPSEC_ASSERT(isr != NULL, ("null isr")); 815 IPSEC_ASSERT(saidx != NULL, ("null saidx")); 816 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 817 saidx->mode == IPSEC_MODE_TUNNEL, 818 ("unexpected policy %u", saidx->mode)); 819 820 /* 821 * XXX guard against protocol callbacks from the crypto 822 * thread as they reference ipsecrequest.sav which we 823 * temporarily null out below. Need to rethink how we 824 * handle bundled SA's in the callback thread. 825 */ 826 IPSECREQUEST_LOCK_ASSERT(isr); 827 828 /* get current level */ 829 level = ipsec_get_reqlevel(isr); 830 831 /* 832 * We check new SA in the IPsec request because a different 833 * SA may be involved each time this request is checked, either 834 * because new SAs are being configured, or this request is 835 * associated with an unconnected datagram socket, or this request 836 * is associated with a system default policy. 837 * 838 * key_allocsa_policy should allocate the oldest SA available. 839 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 840 */ 841 sav = key_allocsa_policy(saidx); 842 if (sav != isr->sav) { 843 /* SA need to be updated. */ 844 if (!IPSECREQUEST_UPGRADE(isr)) { 845 /* Kick everyone off. */ 846 IPSECREQUEST_UNLOCK(isr); 847 IPSECREQUEST_WLOCK(isr); 848 } 849 if (isr->sav != NULL) 850 KEY_FREESAV(&isr->sav); 851 isr->sav = sav; 852 IPSECREQUEST_DOWNGRADE(isr); 853 } else if (sav != NULL) 854 KEY_FREESAV(&sav); 855 856 /* When there is SA. */ 857 if (isr->sav != NULL) { 858 if (isr->sav->state != SADB_SASTATE_MATURE && 859 isr->sav->state != SADB_SASTATE_DYING) 860 return EINVAL; 861 return 0; 862 } 863 864 /* there is no SA */ 865 error = key_acquire(saidx, isr->sp); 866 if (error != 0) { 867 /* XXX What should I do ? */ 868 ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 869 __func__, error)); 870 return error; 871 } 872 873 if (level != IPSEC_LEVEL_REQUIRE) { 874 /* XXX sigh, the interface to this routine is botched */ 875 IPSEC_ASSERT(isr->sav == NULL, ("unexpected SA")); 876 return 0; 877 } else { 878 return ENOENT; 879 } 880 } 881 882 /* 883 * allocating a SA for policy entry from SAD. 884 * NOTE: searching SAD of aliving state. 885 * OUT: NULL: not found. 886 * others: found and return the pointer. 887 */ 888 static struct secasvar * 889 key_allocsa_policy(const struct secasindex *saidx) 890 { 891 #define N(a) _ARRAYLEN(a) 892 struct secashead *sah; 893 struct secasvar *sav; 894 u_int stateidx, arraysize; 895 const u_int *state_valid; 896 897 SAHTREE_LOCK(); 898 LIST_FOREACH(sah, &V_sahtree, chain) { 899 if (sah->state == SADB_SASTATE_DEAD) 900 continue; 901 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) { 902 if (V_key_preferred_oldsa) { 903 state_valid = saorder_state_valid_prefer_old; 904 arraysize = N(saorder_state_valid_prefer_old); 905 } else { 906 state_valid = saorder_state_valid_prefer_new; 907 arraysize = N(saorder_state_valid_prefer_new); 908 } 909 SAHTREE_UNLOCK(); 910 goto found; 911 } 912 } 913 SAHTREE_UNLOCK(); 914 915 return NULL; 916 917 found: 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 int chkport; 1089 1090 IPSEC_ASSERT(dst != NULL, ("null dst address")); 1091 1092 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1093 printf("DP %s from %s:%u\n", __func__, where, tag)); 1094 1095 #ifdef IPSEC_NAT_T 1096 chkport = (dst->sa.sa_family == AF_INET && 1097 dst->sa.sa_len == sizeof(struct sockaddr_in) && 1098 dst->sin.sin_port != 0); 1099 #else 1100 chkport = 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 /* search valid state */ 1119 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1120 state = saorder_state_valid[stateidx]; 1121 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1122 /* sanity check */ 1123 KEY_CHKSASTATE(sav->state, state, __func__); 1124 /* do not return entries w/ unusable state */ 1125 if (sav->state != SADB_SASTATE_MATURE && 1126 sav->state != SADB_SASTATE_DYING) 1127 continue; 1128 if (proto != sav->sah->saidx.proto) 1129 continue; 1130 if (spi != sav->spi) 1131 continue; 1132 #if 0 /* don't check src */ 1133 /* check src address */ 1134 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, chkport) != 0) 1135 continue; 1136 #endif 1137 /* check dst address */ 1138 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1139 continue; 1140 sa_addref(sav); 1141 goto done; 1142 } 1143 } 1144 } 1145 sav = NULL; 1146 done: 1147 SAHTREE_UNLOCK(); 1148 1149 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1150 printf("DP %s return SA:%p; refcnt %u\n", __func__, 1151 sav, sav ? sav->refcnt : 0)); 1152 return sav; 1153 } 1154 1155 /* 1156 * Must be called after calling key_allocsp(). 1157 * For both the packet without socket and key_freeso(). 1158 */ 1159 void 1160 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1161 { 1162 struct secpolicy *sp = *spp; 1163 1164 IPSEC_ASSERT(sp != NULL, ("null sp")); 1165 1166 SPTREE_LOCK(); 1167 SP_DELREF(sp); 1168 1169 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1170 printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1171 __func__, sp, sp->id, where, tag, sp->refcnt)); 1172 1173 if (sp->refcnt == 0) { 1174 *spp = NULL; 1175 key_delsp(sp); 1176 } 1177 SPTREE_UNLOCK(); 1178 } 1179 1180 /* 1181 * Must be called after calling key_allocsp(). 1182 * For the packet with socket. 1183 */ 1184 void 1185 key_freeso(struct socket *so) 1186 { 1187 IPSEC_ASSERT(so != NULL, ("null so")); 1188 1189 switch (so->so_proto->pr_domain->dom_family) { 1190 #if defined(INET) || defined(INET6) 1191 #ifdef INET 1192 case PF_INET: 1193 #endif 1194 #ifdef INET6 1195 case PF_INET6: 1196 #endif 1197 { 1198 struct inpcb *pcb = sotoinpcb(so); 1199 1200 /* Does it have a PCB ? */ 1201 if (pcb == NULL) 1202 return; 1203 key_freesp_so(&pcb->inp_sp->sp_in); 1204 key_freesp_so(&pcb->inp_sp->sp_out); 1205 } 1206 break; 1207 #endif /* INET || INET6 */ 1208 default: 1209 ipseclog((LOG_DEBUG, "%s: unknown address family=%d.\n", 1210 __func__, so->so_proto->pr_domain->dom_family)); 1211 return; 1212 } 1213 } 1214 1215 static void 1216 key_freesp_so(struct secpolicy **sp) 1217 { 1218 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("null sp")); 1219 1220 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1221 (*sp)->policy == IPSEC_POLICY_BYPASS) 1222 return; 1223 1224 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1225 ("invalid policy %u", (*sp)->policy)); 1226 KEY_FREESP(sp); 1227 } 1228 1229 void 1230 key_addrefsa(struct secasvar *sav, const char* where, int tag) 1231 { 1232 1233 IPSEC_ASSERT(sav != NULL, ("null sav")); 1234 IPSEC_ASSERT(sav->refcnt > 0, ("refcount must exist")); 1235 1236 sa_addref(sav); 1237 } 1238 1239 /* 1240 * Must be called after calling key_allocsa(). 1241 * This function is called by key_freesp() to free some SA allocated 1242 * for a policy. 1243 */ 1244 void 1245 key_freesav(struct secasvar **psav, const char* where, int tag) 1246 { 1247 struct secasvar *sav = *psav; 1248 1249 IPSEC_ASSERT(sav != NULL, ("null sav")); 1250 1251 if (sa_delref(sav)) { 1252 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1253 printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1254 __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1255 *psav = NULL; 1256 key_delsav(sav); 1257 } else { 1258 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1259 printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1260 __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1261 } 1262 } 1263 1264 /* %%% SPD management */ 1265 /* 1266 * free security policy entry. 1267 */ 1268 static void 1269 key_delsp(struct secpolicy *sp) 1270 { 1271 struct ipsecrequest *isr, *nextisr; 1272 1273 IPSEC_ASSERT(sp != NULL, ("null sp")); 1274 SPTREE_LOCK_ASSERT(); 1275 1276 sp->state = IPSEC_SPSTATE_DEAD; 1277 1278 IPSEC_ASSERT(sp->refcnt == 0, 1279 ("SP with references deleted (refcnt %u)", sp->refcnt)); 1280 1281 /* remove from SP index */ 1282 if (__LIST_CHAINED(sp)) 1283 LIST_REMOVE(sp, chain); 1284 1285 for (isr = sp->req; isr != NULL; isr = nextisr) { 1286 if (isr->sav != NULL) { 1287 KEY_FREESAV(&isr->sav); 1288 isr->sav = NULL; 1289 } 1290 1291 nextisr = isr->next; 1292 ipsec_delisr(isr); 1293 } 1294 _key_delsp(sp); 1295 } 1296 1297 /* 1298 * search SPD 1299 * OUT: NULL : not found 1300 * others : found, pointer to a SP. 1301 */ 1302 static struct secpolicy * 1303 key_getsp(struct secpolicyindex *spidx) 1304 { 1305 struct secpolicy *sp; 1306 1307 IPSEC_ASSERT(spidx != NULL, ("null spidx")); 1308 1309 SPTREE_LOCK(); 1310 LIST_FOREACH(sp, &V_sptree[spidx->dir], chain) { 1311 if (sp->state == IPSEC_SPSTATE_DEAD) 1312 continue; 1313 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1314 SP_ADDREF(sp); 1315 break; 1316 } 1317 } 1318 SPTREE_UNLOCK(); 1319 1320 return sp; 1321 } 1322 1323 /* 1324 * get SP by index. 1325 * OUT: NULL : not found 1326 * others : found, pointer to a SP. 1327 */ 1328 static struct secpolicy * 1329 key_getspbyid(u_int32_t id) 1330 { 1331 struct secpolicy *sp; 1332 1333 SPTREE_LOCK(); 1334 LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_INBOUND], chain) { 1335 if (sp->state == IPSEC_SPSTATE_DEAD) 1336 continue; 1337 if (sp->id == id) { 1338 SP_ADDREF(sp); 1339 goto done; 1340 } 1341 } 1342 1343 LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_OUTBOUND], chain) { 1344 if (sp->state == IPSEC_SPSTATE_DEAD) 1345 continue; 1346 if (sp->id == id) { 1347 SP_ADDREF(sp); 1348 goto done; 1349 } 1350 } 1351 done: 1352 SPTREE_UNLOCK(); 1353 1354 return sp; 1355 } 1356 1357 struct secpolicy * 1358 key_newsp(const char* where, int tag) 1359 { 1360 struct secpolicy *newsp = NULL; 1361 1362 newsp = (struct secpolicy *) 1363 malloc(sizeof(struct secpolicy), M_IPSEC_SP, M_NOWAIT|M_ZERO); 1364 if (newsp) { 1365 SECPOLICY_LOCK_INIT(newsp); 1366 newsp->refcnt = 1; 1367 newsp->req = NULL; 1368 } 1369 1370 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1371 printf("DP %s from %s:%u return SP:%p\n", __func__, 1372 where, tag, newsp)); 1373 return newsp; 1374 } 1375 1376 static void 1377 _key_delsp(struct secpolicy *sp) 1378 { 1379 SECPOLICY_LOCK_DESTROY(sp); 1380 free(sp, M_IPSEC_SP); 1381 } 1382 1383 /* 1384 * create secpolicy structure from sadb_x_policy structure. 1385 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1386 * so must be set properly later. 1387 */ 1388 struct secpolicy * 1389 key_msg2sp(xpl0, len, error) 1390 struct sadb_x_policy *xpl0; 1391 size_t len; 1392 int *error; 1393 { 1394 struct secpolicy *newsp; 1395 1396 IPSEC_ASSERT(xpl0 != NULL, ("null xpl0")); 1397 IPSEC_ASSERT(len >= sizeof(*xpl0), ("policy too short: %zu", len)); 1398 1399 if (len != PFKEY_EXTLEN(xpl0)) { 1400 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__)); 1401 *error = EINVAL; 1402 return NULL; 1403 } 1404 1405 if ((newsp = KEY_NEWSP()) == NULL) { 1406 *error = ENOBUFS; 1407 return NULL; 1408 } 1409 1410 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1411 newsp->policy = xpl0->sadb_x_policy_type; 1412 1413 /* check policy */ 1414 switch (xpl0->sadb_x_policy_type) { 1415 case IPSEC_POLICY_DISCARD: 1416 case IPSEC_POLICY_NONE: 1417 case IPSEC_POLICY_ENTRUST: 1418 case IPSEC_POLICY_BYPASS: 1419 newsp->req = NULL; 1420 break; 1421 1422 case IPSEC_POLICY_IPSEC: 1423 { 1424 int tlen; 1425 struct sadb_x_ipsecrequest *xisr; 1426 struct ipsecrequest **p_isr = &newsp->req; 1427 1428 /* validity check */ 1429 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1430 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", 1431 __func__)); 1432 KEY_FREESP(&newsp); 1433 *error = EINVAL; 1434 return NULL; 1435 } 1436 1437 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1438 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1); 1439 1440 while (tlen > 0) { 1441 /* length check */ 1442 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1443 ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest " 1444 "length.\n", __func__)); 1445 KEY_FREESP(&newsp); 1446 *error = EINVAL; 1447 return NULL; 1448 } 1449 1450 /* allocate request buffer */ 1451 /* NB: data structure is zero'd */ 1452 *p_isr = ipsec_newisr(); 1453 if ((*p_isr) == NULL) { 1454 ipseclog((LOG_DEBUG, 1455 "%s: No more memory.\n", __func__)); 1456 KEY_FREESP(&newsp); 1457 *error = ENOBUFS; 1458 return NULL; 1459 } 1460 1461 /* set values */ 1462 switch (xisr->sadb_x_ipsecrequest_proto) { 1463 case IPPROTO_ESP: 1464 case IPPROTO_AH: 1465 case IPPROTO_IPCOMP: 1466 break; 1467 default: 1468 ipseclog((LOG_DEBUG, 1469 "%s: invalid proto type=%u\n", __func__, 1470 xisr->sadb_x_ipsecrequest_proto)); 1471 KEY_FREESP(&newsp); 1472 *error = EPROTONOSUPPORT; 1473 return NULL; 1474 } 1475 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1476 1477 switch (xisr->sadb_x_ipsecrequest_mode) { 1478 case IPSEC_MODE_TRANSPORT: 1479 case IPSEC_MODE_TUNNEL: 1480 break; 1481 case IPSEC_MODE_ANY: 1482 default: 1483 ipseclog((LOG_DEBUG, 1484 "%s: invalid mode=%u\n", __func__, 1485 xisr->sadb_x_ipsecrequest_mode)); 1486 KEY_FREESP(&newsp); 1487 *error = EINVAL; 1488 return NULL; 1489 } 1490 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1491 1492 switch (xisr->sadb_x_ipsecrequest_level) { 1493 case IPSEC_LEVEL_DEFAULT: 1494 case IPSEC_LEVEL_USE: 1495 case IPSEC_LEVEL_REQUIRE: 1496 break; 1497 case IPSEC_LEVEL_UNIQUE: 1498 /* validity check */ 1499 /* 1500 * If range violation of reqid, kernel will 1501 * update it, don't refuse it. 1502 */ 1503 if (xisr->sadb_x_ipsecrequest_reqid 1504 > IPSEC_MANUAL_REQID_MAX) { 1505 ipseclog((LOG_DEBUG, 1506 "%s: reqid=%d range " 1507 "violation, updated by kernel.\n", 1508 __func__, 1509 xisr->sadb_x_ipsecrequest_reqid)); 1510 xisr->sadb_x_ipsecrequest_reqid = 0; 1511 } 1512 1513 /* allocate new reqid id if reqid is zero. */ 1514 if (xisr->sadb_x_ipsecrequest_reqid == 0) { 1515 u_int32_t reqid; 1516 if ((reqid = key_newreqid()) == 0) { 1517 KEY_FREESP(&newsp); 1518 *error = ENOBUFS; 1519 return NULL; 1520 } 1521 (*p_isr)->saidx.reqid = reqid; 1522 xisr->sadb_x_ipsecrequest_reqid = reqid; 1523 } else { 1524 /* set it for manual keying. */ 1525 (*p_isr)->saidx.reqid = 1526 xisr->sadb_x_ipsecrequest_reqid; 1527 } 1528 break; 1529 1530 default: 1531 ipseclog((LOG_DEBUG, "%s: invalid level=%u\n", 1532 __func__, 1533 xisr->sadb_x_ipsecrequest_level)); 1534 KEY_FREESP(&newsp); 1535 *error = EINVAL; 1536 return NULL; 1537 } 1538 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1539 1540 /* set IP addresses if there */ 1541 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1542 struct sockaddr *paddr; 1543 1544 paddr = (struct sockaddr *)(xisr + 1); 1545 1546 /* validity check */ 1547 if (paddr->sa_len 1548 > sizeof((*p_isr)->saidx.src)) { 1549 ipseclog((LOG_DEBUG, "%s: invalid " 1550 "request address length.\n", 1551 __func__)); 1552 KEY_FREESP(&newsp); 1553 *error = EINVAL; 1554 return NULL; 1555 } 1556 bcopy(paddr, &(*p_isr)->saidx.src, 1557 paddr->sa_len); 1558 1559 paddr = (struct sockaddr *)((caddr_t)paddr 1560 + paddr->sa_len); 1561 1562 /* validity check */ 1563 if (paddr->sa_len 1564 > sizeof((*p_isr)->saidx.dst)) { 1565 ipseclog((LOG_DEBUG, "%s: invalid " 1566 "request address length.\n", 1567 __func__)); 1568 KEY_FREESP(&newsp); 1569 *error = EINVAL; 1570 return NULL; 1571 } 1572 bcopy(paddr, &(*p_isr)->saidx.dst, 1573 paddr->sa_len); 1574 } 1575 1576 (*p_isr)->sp = newsp; 1577 1578 /* initialization for the next. */ 1579 p_isr = &(*p_isr)->next; 1580 tlen -= xisr->sadb_x_ipsecrequest_len; 1581 1582 /* validity check */ 1583 if (tlen < 0) { 1584 ipseclog((LOG_DEBUG, "%s: becoming tlen < 0.\n", 1585 __func__)); 1586 KEY_FREESP(&newsp); 1587 *error = EINVAL; 1588 return NULL; 1589 } 1590 1591 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr 1592 + xisr->sadb_x_ipsecrequest_len); 1593 } 1594 } 1595 break; 1596 default: 1597 ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__)); 1598 KEY_FREESP(&newsp); 1599 *error = EINVAL; 1600 return NULL; 1601 } 1602 1603 *error = 0; 1604 return newsp; 1605 } 1606 1607 static u_int32_t 1608 key_newreqid() 1609 { 1610 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1611 1612 auto_reqid = (auto_reqid == ~0 1613 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1614 1615 /* XXX should be unique check */ 1616 1617 return auto_reqid; 1618 } 1619 1620 /* 1621 * copy secpolicy struct to sadb_x_policy structure indicated. 1622 */ 1623 struct mbuf * 1624 key_sp2msg(sp) 1625 struct secpolicy *sp; 1626 { 1627 struct sadb_x_policy *xpl; 1628 int tlen; 1629 caddr_t p; 1630 struct mbuf *m; 1631 1632 IPSEC_ASSERT(sp != NULL, ("null policy")); 1633 1634 tlen = key_getspreqmsglen(sp); 1635 1636 m = key_alloc_mbuf(tlen); 1637 if (!m || m->m_next) { /*XXX*/ 1638 if (m) 1639 m_freem(m); 1640 return NULL; 1641 } 1642 1643 m->m_len = tlen; 1644 m->m_next = NULL; 1645 xpl = mtod(m, struct sadb_x_policy *); 1646 bzero(xpl, tlen); 1647 1648 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1649 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1650 xpl->sadb_x_policy_type = sp->policy; 1651 xpl->sadb_x_policy_dir = sp->spidx.dir; 1652 xpl->sadb_x_policy_id = sp->id; 1653 p = (caddr_t)xpl + sizeof(*xpl); 1654 1655 /* if is the policy for ipsec ? */ 1656 if (sp->policy == IPSEC_POLICY_IPSEC) { 1657 struct sadb_x_ipsecrequest *xisr; 1658 struct ipsecrequest *isr; 1659 1660 for (isr = sp->req; isr != NULL; isr = isr->next) { 1661 1662 xisr = (struct sadb_x_ipsecrequest *)p; 1663 1664 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1665 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1666 xisr->sadb_x_ipsecrequest_level = isr->level; 1667 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1668 1669 p += sizeof(*xisr); 1670 bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len); 1671 p += isr->saidx.src.sa.sa_len; 1672 bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len); 1673 p += isr->saidx.src.sa.sa_len; 1674 1675 xisr->sadb_x_ipsecrequest_len = 1676 PFKEY_ALIGN8(sizeof(*xisr) 1677 + isr->saidx.src.sa.sa_len 1678 + isr->saidx.dst.sa.sa_len); 1679 } 1680 } 1681 1682 return m; 1683 } 1684 1685 /* m will not be freed nor modified */ 1686 static struct mbuf * 1687 #ifdef __STDC__ 1688 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1689 int ndeep, int nitem, ...) 1690 #else 1691 key_gather_mbuf(m, mhp, ndeep, nitem, va_alist) 1692 struct mbuf *m; 1693 const struct sadb_msghdr *mhp; 1694 int ndeep; 1695 int nitem; 1696 va_dcl 1697 #endif 1698 { 1699 va_list ap; 1700 int idx; 1701 int i; 1702 struct mbuf *result = NULL, *n; 1703 int len; 1704 1705 IPSEC_ASSERT(m != NULL, ("null mbuf")); 1706 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1707 1708 va_start(ap, nitem); 1709 for (i = 0; i < nitem; i++) { 1710 idx = va_arg(ap, int); 1711 if (idx < 0 || idx > SADB_EXT_MAX) 1712 goto fail; 1713 /* don't attempt to pull empty extension */ 1714 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1715 continue; 1716 if (idx != SADB_EXT_RESERVED && 1717 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1718 continue; 1719 1720 if (idx == SADB_EXT_RESERVED) { 1721 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1722 1723 IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len)); 1724 1725 MGETHDR(n, M_DONTWAIT, MT_DATA); 1726 if (!n) 1727 goto fail; 1728 n->m_len = len; 1729 n->m_next = NULL; 1730 m_copydata(m, 0, sizeof(struct sadb_msg), 1731 mtod(n, caddr_t)); 1732 } else if (i < ndeep) { 1733 len = mhp->extlen[idx]; 1734 n = key_alloc_mbuf(len); 1735 if (!n || n->m_next) { /*XXX*/ 1736 if (n) 1737 m_freem(n); 1738 goto fail; 1739 } 1740 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1741 mtod(n, caddr_t)); 1742 } else { 1743 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1744 M_DONTWAIT); 1745 } 1746 if (n == NULL) 1747 goto fail; 1748 1749 if (result) 1750 m_cat(result, n); 1751 else 1752 result = n; 1753 } 1754 va_end(ap); 1755 1756 if ((result->m_flags & M_PKTHDR) != 0) { 1757 result->m_pkthdr.len = 0; 1758 for (n = result; n; n = n->m_next) 1759 result->m_pkthdr.len += n->m_len; 1760 } 1761 1762 return result; 1763 1764 fail: 1765 m_freem(result); 1766 va_end(ap); 1767 return NULL; 1768 } 1769 1770 /* 1771 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1772 * add an entry to SP database, when received 1773 * <base, address(SD), (lifetime(H),) policy> 1774 * from the user(?). 1775 * Adding to SP database, 1776 * and send 1777 * <base, address(SD), (lifetime(H),) policy> 1778 * to the socket which was send. 1779 * 1780 * SPDADD set a unique policy entry. 1781 * SPDSETIDX like SPDADD without a part of policy requests. 1782 * SPDUPDATE replace a unique policy entry. 1783 * 1784 * m will always be freed. 1785 */ 1786 static int 1787 key_spdadd(so, m, mhp) 1788 struct socket *so; 1789 struct mbuf *m; 1790 const struct sadb_msghdr *mhp; 1791 { 1792 struct sadb_address *src0, *dst0; 1793 struct sadb_x_policy *xpl0, *xpl; 1794 struct sadb_lifetime *lft = NULL; 1795 struct secpolicyindex spidx; 1796 struct secpolicy *newsp; 1797 int error; 1798 1799 IPSEC_ASSERT(so != NULL, ("null socket")); 1800 IPSEC_ASSERT(m != NULL, ("null mbuf")); 1801 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1802 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 1803 1804 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1805 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1806 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1807 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1808 return key_senderror(so, m, EINVAL); 1809 } 1810 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1811 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1812 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1813 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1814 __func__)); 1815 return key_senderror(so, m, EINVAL); 1816 } 1817 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1818 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1819 < sizeof(struct sadb_lifetime)) { 1820 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1821 __func__)); 1822 return key_senderror(so, m, EINVAL); 1823 } 1824 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1825 } 1826 1827 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1828 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1829 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1830 1831 /* 1832 * Note: do not parse SADB_X_EXT_NAT_T_* here: 1833 * we are processing traffic endpoints. 1834 */ 1835 1836 /* make secindex */ 1837 /* XXX boundary check against sa_len */ 1838 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1839 src0 + 1, 1840 dst0 + 1, 1841 src0->sadb_address_prefixlen, 1842 dst0->sadb_address_prefixlen, 1843 src0->sadb_address_proto, 1844 &spidx); 1845 1846 /* checking the direciton. */ 1847 switch (xpl0->sadb_x_policy_dir) { 1848 case IPSEC_DIR_INBOUND: 1849 case IPSEC_DIR_OUTBOUND: 1850 break; 1851 default: 1852 ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 1853 mhp->msg->sadb_msg_errno = EINVAL; 1854 return 0; 1855 } 1856 1857 /* check policy */ 1858 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1859 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1860 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1861 ipseclog((LOG_DEBUG, "%s: Invalid policy type.\n", __func__)); 1862 return key_senderror(so, m, EINVAL); 1863 } 1864 1865 /* policy requests are mandatory when action is ipsec. */ 1866 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1867 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1868 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1869 ipseclog((LOG_DEBUG, "%s: some policy requests part required\n", 1870 __func__)); 1871 return key_senderror(so, m, EINVAL); 1872 } 1873 1874 /* 1875 * checking there is SP already or not. 1876 * SPDUPDATE doesn't depend on whether there is a SP or not. 1877 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1878 * then error. 1879 */ 1880 newsp = key_getsp(&spidx); 1881 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1882 if (newsp) { 1883 SPTREE_LOCK(); 1884 newsp->state = IPSEC_SPSTATE_DEAD; 1885 SPTREE_UNLOCK(); 1886 KEY_FREESP(&newsp); 1887 } 1888 } else { 1889 if (newsp != NULL) { 1890 KEY_FREESP(&newsp); 1891 ipseclog((LOG_DEBUG, "%s: a SP entry exists already.\n", 1892 __func__)); 1893 return key_senderror(so, m, EEXIST); 1894 } 1895 } 1896 1897 /* allocation new SP entry */ 1898 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1899 return key_senderror(so, m, error); 1900 } 1901 1902 if ((newsp->id = key_getnewspid()) == 0) { 1903 _key_delsp(newsp); 1904 return key_senderror(so, m, ENOBUFS); 1905 } 1906 1907 /* XXX boundary check against sa_len */ 1908 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1909 src0 + 1, 1910 dst0 + 1, 1911 src0->sadb_address_prefixlen, 1912 dst0->sadb_address_prefixlen, 1913 src0->sadb_address_proto, 1914 &newsp->spidx); 1915 1916 /* sanity check on addr pair */ 1917 if (((struct sockaddr *)(src0 + 1))->sa_family != 1918 ((struct sockaddr *)(dst0+ 1))->sa_family) { 1919 _key_delsp(newsp); 1920 return key_senderror(so, m, EINVAL); 1921 } 1922 if (((struct sockaddr *)(src0 + 1))->sa_len != 1923 ((struct sockaddr *)(dst0+ 1))->sa_len) { 1924 _key_delsp(newsp); 1925 return key_senderror(so, m, EINVAL); 1926 } 1927 #if 1 1928 if (newsp->req && newsp->req->saidx.src.sa.sa_family) { 1929 struct sockaddr *sa; 1930 sa = (struct sockaddr *)(src0 + 1); 1931 if (sa->sa_family != newsp->req->saidx.src.sa.sa_family) { 1932 _key_delsp(newsp); 1933 return key_senderror(so, m, EINVAL); 1934 } 1935 } 1936 if (newsp->req && newsp->req->saidx.dst.sa.sa_family) { 1937 struct sockaddr *sa; 1938 sa = (struct sockaddr *)(dst0 + 1); 1939 if (sa->sa_family != newsp->req->saidx.dst.sa.sa_family) { 1940 _key_delsp(newsp); 1941 return key_senderror(so, m, EINVAL); 1942 } 1943 } 1944 #endif 1945 1946 newsp->created = time_second; 1947 newsp->lastused = newsp->created; 1948 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1949 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1950 1951 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1952 newsp->state = IPSEC_SPSTATE_ALIVE; 1953 LIST_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1954 1955 /* delete the entry in spacqtree */ 1956 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1957 struct secspacq *spacq = key_getspacq(&spidx); 1958 if (spacq != NULL) { 1959 /* reset counter in order to deletion by timehandler. */ 1960 spacq->created = time_second; 1961 spacq->count = 0; 1962 SPACQ_UNLOCK(); 1963 } 1964 } 1965 1966 { 1967 struct mbuf *n, *mpolicy; 1968 struct sadb_msg *newmsg; 1969 int off; 1970 1971 /* 1972 * Note: do not send SADB_X_EXT_NAT_T_* here: 1973 * we are sending traffic endpoints. 1974 */ 1975 1976 /* create new sadb_msg to reply. */ 1977 if (lft) { 1978 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1979 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1980 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1981 } else { 1982 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1983 SADB_X_EXT_POLICY, 1984 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1985 } 1986 if (!n) 1987 return key_senderror(so, m, ENOBUFS); 1988 1989 if (n->m_len < sizeof(*newmsg)) { 1990 n = m_pullup(n, sizeof(*newmsg)); 1991 if (!n) 1992 return key_senderror(so, m, ENOBUFS); 1993 } 1994 newmsg = mtod(n, struct sadb_msg *); 1995 newmsg->sadb_msg_errno = 0; 1996 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1997 1998 off = 0; 1999 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2000 sizeof(*xpl), &off); 2001 if (mpolicy == NULL) { 2002 /* n is already freed */ 2003 return key_senderror(so, m, ENOBUFS); 2004 } 2005 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off); 2006 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2007 m_freem(n); 2008 return key_senderror(so, m, EINVAL); 2009 } 2010 xpl->sadb_x_policy_id = newsp->id; 2011 2012 m_freem(m); 2013 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2014 } 2015 } 2016 2017 /* 2018 * get new policy id. 2019 * OUT: 2020 * 0: failure. 2021 * others: success. 2022 */ 2023 static u_int32_t 2024 key_getnewspid() 2025 { 2026 u_int32_t newid = 0; 2027 int count = V_key_spi_trycnt; /* XXX */ 2028 struct secpolicy *sp; 2029 2030 /* when requesting to allocate spi ranged */ 2031 while (count--) { 2032 newid = (V_policy_id = (V_policy_id == ~0 ? 1 : V_policy_id + 1)); 2033 2034 if ((sp = key_getspbyid(newid)) == NULL) 2035 break; 2036 2037 KEY_FREESP(&sp); 2038 } 2039 2040 if (count == 0 || newid == 0) { 2041 ipseclog((LOG_DEBUG, "%s: to allocate policy id is failed.\n", 2042 __func__)); 2043 return 0; 2044 } 2045 2046 return newid; 2047 } 2048 2049 /* 2050 * SADB_SPDDELETE processing 2051 * receive 2052 * <base, address(SD), policy(*)> 2053 * from the user(?), and set SADB_SASTATE_DEAD, 2054 * and send, 2055 * <base, address(SD), policy(*)> 2056 * to the ikmpd. 2057 * policy(*) including direction of policy. 2058 * 2059 * m will always be freed. 2060 */ 2061 static int 2062 key_spddelete(so, m, mhp) 2063 struct socket *so; 2064 struct mbuf *m; 2065 const struct sadb_msghdr *mhp; 2066 { 2067 struct sadb_address *src0, *dst0; 2068 struct sadb_x_policy *xpl0; 2069 struct secpolicyindex spidx; 2070 struct secpolicy *sp; 2071 2072 IPSEC_ASSERT(so != NULL, ("null so")); 2073 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2074 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2075 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2076 2077 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2078 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2079 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2080 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2081 __func__)); 2082 return key_senderror(so, m, EINVAL); 2083 } 2084 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2085 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2086 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2087 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2088 __func__)); 2089 return key_senderror(so, m, EINVAL); 2090 } 2091 2092 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2093 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2094 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2095 2096 /* 2097 * Note: do not parse SADB_X_EXT_NAT_T_* here: 2098 * we are processing traffic endpoints. 2099 */ 2100 2101 /* make secindex */ 2102 /* XXX boundary check against sa_len */ 2103 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2104 src0 + 1, 2105 dst0 + 1, 2106 src0->sadb_address_prefixlen, 2107 dst0->sadb_address_prefixlen, 2108 src0->sadb_address_proto, 2109 &spidx); 2110 2111 /* checking the direciton. */ 2112 switch (xpl0->sadb_x_policy_dir) { 2113 case IPSEC_DIR_INBOUND: 2114 case IPSEC_DIR_OUTBOUND: 2115 break; 2116 default: 2117 ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 2118 return key_senderror(so, m, EINVAL); 2119 } 2120 2121 /* Is there SP in SPD ? */ 2122 if ((sp = key_getsp(&spidx)) == NULL) { 2123 ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__)); 2124 return key_senderror(so, m, EINVAL); 2125 } 2126 2127 /* save policy id to buffer to be returned. */ 2128 xpl0->sadb_x_policy_id = sp->id; 2129 2130 SPTREE_LOCK(); 2131 sp->state = IPSEC_SPSTATE_DEAD; 2132 SPTREE_UNLOCK(); 2133 KEY_FREESP(&sp); 2134 2135 { 2136 struct mbuf *n; 2137 struct sadb_msg *newmsg; 2138 2139 /* 2140 * Note: do not send SADB_X_EXT_NAT_T_* here: 2141 * we are sending traffic endpoints. 2142 */ 2143 2144 /* create new sadb_msg to reply. */ 2145 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2146 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2147 if (!n) 2148 return key_senderror(so, m, ENOBUFS); 2149 2150 newmsg = mtod(n, struct sadb_msg *); 2151 newmsg->sadb_msg_errno = 0; 2152 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2153 2154 m_freem(m); 2155 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2156 } 2157 } 2158 2159 /* 2160 * SADB_SPDDELETE2 processing 2161 * receive 2162 * <base, policy(*)> 2163 * from the user(?), and set SADB_SASTATE_DEAD, 2164 * and send, 2165 * <base, policy(*)> 2166 * to the ikmpd. 2167 * policy(*) including direction of policy. 2168 * 2169 * m will always be freed. 2170 */ 2171 static int 2172 key_spddelete2(so, m, mhp) 2173 struct socket *so; 2174 struct mbuf *m; 2175 const struct sadb_msghdr *mhp; 2176 { 2177 u_int32_t id; 2178 struct secpolicy *sp; 2179 2180 IPSEC_ASSERT(so != NULL, ("null socket")); 2181 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2182 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2183 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2184 2185 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2186 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2187 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", __func__)); 2188 return key_senderror(so, m, EINVAL); 2189 } 2190 2191 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2192 2193 /* Is there SP in SPD ? */ 2194 if ((sp = key_getspbyid(id)) == NULL) { 2195 ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2196 return key_senderror(so, m, EINVAL); 2197 } 2198 2199 SPTREE_LOCK(); 2200 sp->state = IPSEC_SPSTATE_DEAD; 2201 SPTREE_UNLOCK(); 2202 KEY_FREESP(&sp); 2203 2204 { 2205 struct mbuf *n, *nn; 2206 struct sadb_msg *newmsg; 2207 int off, len; 2208 2209 /* create new sadb_msg to reply. */ 2210 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2211 2212 MGETHDR(n, M_DONTWAIT, MT_DATA); 2213 if (n && len > MHLEN) { 2214 MCLGET(n, M_DONTWAIT); 2215 if ((n->m_flags & M_EXT) == 0) { 2216 m_freem(n); 2217 n = NULL; 2218 } 2219 } 2220 if (!n) 2221 return key_senderror(so, m, ENOBUFS); 2222 2223 n->m_len = len; 2224 n->m_next = NULL; 2225 off = 0; 2226 2227 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 2228 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2229 2230 IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)", 2231 off, len)); 2232 2233 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2234 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2235 if (!n->m_next) { 2236 m_freem(n); 2237 return key_senderror(so, m, ENOBUFS); 2238 } 2239 2240 n->m_pkthdr.len = 0; 2241 for (nn = n; nn; nn = nn->m_next) 2242 n->m_pkthdr.len += nn->m_len; 2243 2244 newmsg = mtod(n, struct sadb_msg *); 2245 newmsg->sadb_msg_errno = 0; 2246 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2247 2248 m_freem(m); 2249 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2250 } 2251 } 2252 2253 /* 2254 * SADB_X_GET processing 2255 * receive 2256 * <base, policy(*)> 2257 * from the user(?), 2258 * and send, 2259 * <base, address(SD), policy> 2260 * to the ikmpd. 2261 * policy(*) including direction of policy. 2262 * 2263 * m will always be freed. 2264 */ 2265 static int 2266 key_spdget(so, m, mhp) 2267 struct socket *so; 2268 struct mbuf *m; 2269 const struct sadb_msghdr *mhp; 2270 { 2271 u_int32_t id; 2272 struct secpolicy *sp; 2273 struct mbuf *n; 2274 2275 IPSEC_ASSERT(so != NULL, ("null socket")); 2276 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2277 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2278 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2279 2280 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2281 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2282 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2283 __func__)); 2284 return key_senderror(so, m, EINVAL); 2285 } 2286 2287 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2288 2289 /* Is there SP in SPD ? */ 2290 if ((sp = key_getspbyid(id)) == NULL) { 2291 ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2292 return key_senderror(so, m, ENOENT); 2293 } 2294 2295 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); 2296 KEY_FREESP(&sp); 2297 if (n != NULL) { 2298 m_freem(m); 2299 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2300 } else 2301 return key_senderror(so, m, ENOBUFS); 2302 } 2303 2304 /* 2305 * SADB_X_SPDACQUIRE processing. 2306 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2307 * send 2308 * <base, policy(*)> 2309 * to KMD, and expect to receive 2310 * <base> with SADB_X_SPDACQUIRE if error occured, 2311 * or 2312 * <base, policy> 2313 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2314 * policy(*) is without policy requests. 2315 * 2316 * 0 : succeed 2317 * others: error number 2318 */ 2319 int 2320 key_spdacquire(sp) 2321 struct secpolicy *sp; 2322 { 2323 struct mbuf *result = NULL, *m; 2324 struct secspacq *newspacq; 2325 2326 IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2327 IPSEC_ASSERT(sp->req == NULL, ("policy exists")); 2328 IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC, 2329 ("policy not IPSEC %u", sp->policy)); 2330 2331 /* Get an entry to check whether sent message or not. */ 2332 newspacq = key_getspacq(&sp->spidx); 2333 if (newspacq != NULL) { 2334 if (V_key_blockacq_count < newspacq->count) { 2335 /* reset counter and do send message. */ 2336 newspacq->count = 0; 2337 } else { 2338 /* increment counter and do nothing. */ 2339 newspacq->count++; 2340 return 0; 2341 } 2342 SPACQ_UNLOCK(); 2343 } else { 2344 /* make new entry for blocking to send SADB_ACQUIRE. */ 2345 newspacq = key_newspacq(&sp->spidx); 2346 if (newspacq == NULL) 2347 return ENOBUFS; 2348 } 2349 2350 /* create new sadb_msg to reply. */ 2351 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2352 if (!m) 2353 return ENOBUFS; 2354 2355 result = m; 2356 2357 result->m_pkthdr.len = 0; 2358 for (m = result; m; m = m->m_next) 2359 result->m_pkthdr.len += m->m_len; 2360 2361 mtod(result, struct sadb_msg *)->sadb_msg_len = 2362 PFKEY_UNIT64(result->m_pkthdr.len); 2363 2364 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2365 } 2366 2367 /* 2368 * SADB_SPDFLUSH processing 2369 * receive 2370 * <base> 2371 * from the user, and free all entries in secpctree. 2372 * and send, 2373 * <base> 2374 * to the user. 2375 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2376 * 2377 * m will always be freed. 2378 */ 2379 static int 2380 key_spdflush(so, m, mhp) 2381 struct socket *so; 2382 struct mbuf *m; 2383 const struct sadb_msghdr *mhp; 2384 { 2385 struct sadb_msg *newmsg; 2386 struct secpolicy *sp; 2387 u_int dir; 2388 2389 IPSEC_ASSERT(so != NULL, ("null socket")); 2390 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2391 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2392 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2393 2394 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2395 return key_senderror(so, m, EINVAL); 2396 2397 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2398 SPTREE_LOCK(); 2399 LIST_FOREACH(sp, &V_sptree[dir], chain) 2400 sp->state = IPSEC_SPSTATE_DEAD; 2401 SPTREE_UNLOCK(); 2402 } 2403 2404 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2405 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2406 return key_senderror(so, m, ENOBUFS); 2407 } 2408 2409 if (m->m_next) 2410 m_freem(m->m_next); 2411 m->m_next = NULL; 2412 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2413 newmsg = mtod(m, struct sadb_msg *); 2414 newmsg->sadb_msg_errno = 0; 2415 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2416 2417 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2418 } 2419 2420 /* 2421 * SADB_SPDDUMP processing 2422 * receive 2423 * <base> 2424 * from the user, and dump all SP leaves 2425 * and send, 2426 * <base> ..... 2427 * to the ikmpd. 2428 * 2429 * m will always be freed. 2430 */ 2431 static int 2432 key_spddump(so, m, mhp) 2433 struct socket *so; 2434 struct mbuf *m; 2435 const struct sadb_msghdr *mhp; 2436 { 2437 struct secpolicy *sp; 2438 int cnt; 2439 u_int dir; 2440 struct mbuf *n; 2441 2442 IPSEC_ASSERT(so != NULL, ("null socket")); 2443 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2444 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2445 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2446 2447 /* search SPD entry and get buffer size. */ 2448 cnt = 0; 2449 SPTREE_LOCK(); 2450 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2451 LIST_FOREACH(sp, &V_sptree[dir], chain) { 2452 cnt++; 2453 } 2454 } 2455 2456 if (cnt == 0) { 2457 SPTREE_UNLOCK(); 2458 return key_senderror(so, m, ENOENT); 2459 } 2460 2461 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2462 LIST_FOREACH(sp, &V_sptree[dir], chain) { 2463 --cnt; 2464 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, 2465 mhp->msg->sadb_msg_pid); 2466 2467 if (n) 2468 key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2469 } 2470 } 2471 2472 SPTREE_UNLOCK(); 2473 m_freem(m); 2474 return 0; 2475 } 2476 2477 static struct mbuf * 2478 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, u_int32_t pid) 2479 { 2480 struct mbuf *result = NULL, *m; 2481 struct seclifetime lt; 2482 2483 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2484 if (!m) 2485 goto fail; 2486 result = m; 2487 2488 /* 2489 * Note: do not send SADB_X_EXT_NAT_T_* here: 2490 * we are sending traffic endpoints. 2491 */ 2492 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2493 &sp->spidx.src.sa, sp->spidx.prefs, 2494 sp->spidx.ul_proto); 2495 if (!m) 2496 goto fail; 2497 m_cat(result, m); 2498 2499 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2500 &sp->spidx.dst.sa, sp->spidx.prefd, 2501 sp->spidx.ul_proto); 2502 if (!m) 2503 goto fail; 2504 m_cat(result, m); 2505 2506 m = key_sp2msg(sp); 2507 if (!m) 2508 goto fail; 2509 m_cat(result, m); 2510 2511 if(sp->lifetime){ 2512 lt.addtime=sp->created; 2513 lt.usetime= sp->lastused; 2514 m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT); 2515 if (!m) 2516 goto fail; 2517 m_cat(result, m); 2518 2519 lt.addtime=sp->lifetime; 2520 lt.usetime= sp->validtime; 2521 m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD); 2522 if (!m) 2523 goto fail; 2524 m_cat(result, m); 2525 } 2526 2527 if ((result->m_flags & M_PKTHDR) == 0) 2528 goto fail; 2529 2530 if (result->m_len < sizeof(struct sadb_msg)) { 2531 result = m_pullup(result, sizeof(struct sadb_msg)); 2532 if (result == NULL) 2533 goto fail; 2534 } 2535 2536 result->m_pkthdr.len = 0; 2537 for (m = result; m; m = m->m_next) 2538 result->m_pkthdr.len += m->m_len; 2539 2540 mtod(result, struct sadb_msg *)->sadb_msg_len = 2541 PFKEY_UNIT64(result->m_pkthdr.len); 2542 2543 return result; 2544 2545 fail: 2546 m_freem(result); 2547 return NULL; 2548 } 2549 2550 /* 2551 * get PFKEY message length for security policy and request. 2552 */ 2553 static u_int 2554 key_getspreqmsglen(sp) 2555 struct secpolicy *sp; 2556 { 2557 u_int tlen; 2558 2559 tlen = sizeof(struct sadb_x_policy); 2560 2561 /* if is the policy for ipsec ? */ 2562 if (sp->policy != IPSEC_POLICY_IPSEC) 2563 return tlen; 2564 2565 /* get length of ipsec requests */ 2566 { 2567 struct ipsecrequest *isr; 2568 int len; 2569 2570 for (isr = sp->req; isr != NULL; isr = isr->next) { 2571 len = sizeof(struct sadb_x_ipsecrequest) 2572 + isr->saidx.src.sa.sa_len 2573 + isr->saidx.dst.sa.sa_len; 2574 2575 tlen += PFKEY_ALIGN8(len); 2576 } 2577 } 2578 2579 return tlen; 2580 } 2581 2582 /* 2583 * SADB_SPDEXPIRE processing 2584 * send 2585 * <base, address(SD), lifetime(CH), policy> 2586 * to KMD by PF_KEY. 2587 * 2588 * OUT: 0 : succeed 2589 * others : error number 2590 */ 2591 static int 2592 key_spdexpire(sp) 2593 struct secpolicy *sp; 2594 { 2595 struct mbuf *result = NULL, *m; 2596 int len; 2597 int error = -1; 2598 struct sadb_lifetime *lt; 2599 2600 /* XXX: Why do we lock ? */ 2601 2602 IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2603 2604 /* set msg header */ 2605 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2606 if (!m) { 2607 error = ENOBUFS; 2608 goto fail; 2609 } 2610 result = m; 2611 2612 /* create lifetime extension (current and hard) */ 2613 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2614 m = key_alloc_mbuf(len); 2615 if (!m || m->m_next) { /*XXX*/ 2616 if (m) 2617 m_freem(m); 2618 error = ENOBUFS; 2619 goto fail; 2620 } 2621 bzero(mtod(m, caddr_t), len); 2622 lt = mtod(m, struct sadb_lifetime *); 2623 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2624 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2625 lt->sadb_lifetime_allocations = 0; 2626 lt->sadb_lifetime_bytes = 0; 2627 lt->sadb_lifetime_addtime = sp->created; 2628 lt->sadb_lifetime_usetime = sp->lastused; 2629 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 2630 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2631 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2632 lt->sadb_lifetime_allocations = 0; 2633 lt->sadb_lifetime_bytes = 0; 2634 lt->sadb_lifetime_addtime = sp->lifetime; 2635 lt->sadb_lifetime_usetime = sp->validtime; 2636 m_cat(result, m); 2637 2638 /* 2639 * Note: do not send SADB_X_EXT_NAT_T_* here: 2640 * we are sending traffic endpoints. 2641 */ 2642 2643 /* set sadb_address for source */ 2644 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2645 &sp->spidx.src.sa, 2646 sp->spidx.prefs, sp->spidx.ul_proto); 2647 if (!m) { 2648 error = ENOBUFS; 2649 goto fail; 2650 } 2651 m_cat(result, m); 2652 2653 /* set sadb_address for destination */ 2654 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2655 &sp->spidx.dst.sa, 2656 sp->spidx.prefd, sp->spidx.ul_proto); 2657 if (!m) { 2658 error = ENOBUFS; 2659 goto fail; 2660 } 2661 m_cat(result, m); 2662 2663 /* set secpolicy */ 2664 m = key_sp2msg(sp); 2665 if (!m) { 2666 error = ENOBUFS; 2667 goto fail; 2668 } 2669 m_cat(result, m); 2670 2671 if ((result->m_flags & M_PKTHDR) == 0) { 2672 error = EINVAL; 2673 goto fail; 2674 } 2675 2676 if (result->m_len < sizeof(struct sadb_msg)) { 2677 result = m_pullup(result, sizeof(struct sadb_msg)); 2678 if (result == NULL) { 2679 error = ENOBUFS; 2680 goto fail; 2681 } 2682 } 2683 2684 result->m_pkthdr.len = 0; 2685 for (m = result; m; m = m->m_next) 2686 result->m_pkthdr.len += m->m_len; 2687 2688 mtod(result, struct sadb_msg *)->sadb_msg_len = 2689 PFKEY_UNIT64(result->m_pkthdr.len); 2690 2691 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2692 2693 fail: 2694 if (result) 2695 m_freem(result); 2696 return error; 2697 } 2698 2699 /* %%% SAD management */ 2700 /* 2701 * allocating a memory for new SA head, and copy from the values of mhp. 2702 * OUT: NULL : failure due to the lack of memory. 2703 * others : pointer to new SA head. 2704 */ 2705 static struct secashead * 2706 key_newsah(saidx) 2707 struct secasindex *saidx; 2708 { 2709 struct secashead *newsah; 2710 2711 IPSEC_ASSERT(saidx != NULL, ("null saidx")); 2712 2713 newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO); 2714 if (newsah != NULL) { 2715 int i; 2716 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2717 LIST_INIT(&newsah->savtree[i]); 2718 newsah->saidx = *saidx; 2719 2720 /* add to saidxtree */ 2721 newsah->state = SADB_SASTATE_MATURE; 2722 2723 SAHTREE_LOCK(); 2724 LIST_INSERT_HEAD(&V_sahtree, newsah, chain); 2725 SAHTREE_UNLOCK(); 2726 } 2727 return(newsah); 2728 } 2729 2730 /* 2731 * delete SA index and all SA registerd. 2732 */ 2733 static void 2734 key_delsah(sah) 2735 struct secashead *sah; 2736 { 2737 struct secasvar *sav, *nextsav; 2738 u_int stateidx; 2739 int zombie = 0; 2740 2741 IPSEC_ASSERT(sah != NULL, ("NULL sah")); 2742 SAHTREE_LOCK_ASSERT(); 2743 2744 /* searching all SA registerd in the secindex. */ 2745 for (stateidx = 0; 2746 stateidx < _ARRAYLEN(saorder_state_any); 2747 stateidx++) { 2748 u_int state = saorder_state_any[stateidx]; 2749 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2750 if (sav->refcnt == 0) { 2751 /* sanity check */ 2752 KEY_CHKSASTATE(state, sav->state, __func__); 2753 /* 2754 * do NOT call KEY_FREESAV here: 2755 * it will only delete the sav if refcnt == 1, 2756 * where we already know that refcnt == 0 2757 */ 2758 key_delsav(sav); 2759 } else { 2760 /* give up to delete this sa */ 2761 zombie++; 2762 } 2763 } 2764 } 2765 if (!zombie) { /* delete only if there are savs */ 2766 /* remove from tree of SA index */ 2767 if (__LIST_CHAINED(sah)) 2768 LIST_REMOVE(sah, chain); 2769 if (sah->route_cache.sa_route.ro_rt) { 2770 RTFREE(sah->route_cache.sa_route.ro_rt); 2771 sah->route_cache.sa_route.ro_rt = (struct rtentry *)NULL; 2772 } 2773 free(sah, M_IPSEC_SAH); 2774 } 2775 } 2776 2777 /* 2778 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2779 * and copy the values of mhp into new buffer. 2780 * When SAD message type is GETSPI: 2781 * to set sequence number from acq_seq++, 2782 * to set zero to SPI. 2783 * not to call key_setsava(). 2784 * OUT: NULL : fail 2785 * others : pointer to new secasvar. 2786 * 2787 * does not modify mbuf. does not free mbuf on error. 2788 */ 2789 static struct secasvar * 2790 key_newsav(m, mhp, sah, errp, where, tag) 2791 struct mbuf *m; 2792 const struct sadb_msghdr *mhp; 2793 struct secashead *sah; 2794 int *errp; 2795 const char* where; 2796 int tag; 2797 { 2798 struct secasvar *newsav; 2799 const struct sadb_sa *xsa; 2800 2801 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2802 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2803 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2804 IPSEC_ASSERT(sah != NULL, ("null secashead")); 2805 2806 newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO); 2807 if (newsav == NULL) { 2808 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2809 *errp = ENOBUFS; 2810 goto done; 2811 } 2812 2813 switch (mhp->msg->sadb_msg_type) { 2814 case SADB_GETSPI: 2815 newsav->spi = 0; 2816 2817 #ifdef IPSEC_DOSEQCHECK 2818 /* sync sequence number */ 2819 if (mhp->msg->sadb_msg_seq == 0) 2820 newsav->seq = 2821 (V_acq_seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq)); 2822 else 2823 #endif 2824 newsav->seq = mhp->msg->sadb_msg_seq; 2825 break; 2826 2827 case SADB_ADD: 2828 /* sanity check */ 2829 if (mhp->ext[SADB_EXT_SA] == NULL) { 2830 free(newsav, M_IPSEC_SA); 2831 newsav = NULL; 2832 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2833 __func__)); 2834 *errp = EINVAL; 2835 goto done; 2836 } 2837 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2838 newsav->spi = xsa->sadb_sa_spi; 2839 newsav->seq = mhp->msg->sadb_msg_seq; 2840 break; 2841 default: 2842 free(newsav, M_IPSEC_SA); 2843 newsav = NULL; 2844 *errp = EINVAL; 2845 goto done; 2846 } 2847 2848 2849 /* copy sav values */ 2850 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2851 *errp = key_setsaval(newsav, m, mhp); 2852 if (*errp) { 2853 free(newsav, M_IPSEC_SA); 2854 newsav = NULL; 2855 goto done; 2856 } 2857 } 2858 2859 SECASVAR_LOCK_INIT(newsav); 2860 2861 /* reset created */ 2862 newsav->created = time_second; 2863 newsav->pid = mhp->msg->sadb_msg_pid; 2864 2865 /* add to satree */ 2866 newsav->sah = sah; 2867 sa_initref(newsav); 2868 newsav->state = SADB_SASTATE_LARVAL; 2869 2870 SAHTREE_LOCK(); 2871 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2872 secasvar, chain); 2873 SAHTREE_UNLOCK(); 2874 done: 2875 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2876 printf("DP %s from %s:%u return SP:%p\n", __func__, 2877 where, tag, newsav)); 2878 2879 return newsav; 2880 } 2881 2882 /* 2883 * free() SA variable entry. 2884 */ 2885 static void 2886 key_cleansav(struct secasvar *sav) 2887 { 2888 /* 2889 * Cleanup xform state. Note that zeroize'ing causes the 2890 * keys to be cleared; otherwise we must do it ourself. 2891 */ 2892 if (sav->tdb_xform != NULL) { 2893 sav->tdb_xform->xf_zeroize(sav); 2894 sav->tdb_xform = NULL; 2895 } else { 2896 KASSERT(sav->iv == NULL, ("iv but no xform")); 2897 if (sav->key_auth != NULL) 2898 bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth)); 2899 if (sav->key_enc != NULL) 2900 bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc)); 2901 } 2902 if (sav->key_auth != NULL) { 2903 if (sav->key_auth->key_data != NULL) 2904 free(sav->key_auth->key_data, M_IPSEC_MISC); 2905 free(sav->key_auth, M_IPSEC_MISC); 2906 sav->key_auth = NULL; 2907 } 2908 if (sav->key_enc != NULL) { 2909 if (sav->key_enc->key_data != NULL) 2910 free(sav->key_enc->key_data, M_IPSEC_MISC); 2911 free(sav->key_enc, M_IPSEC_MISC); 2912 sav->key_enc = NULL; 2913 } 2914 if (sav->sched) { 2915 bzero(sav->sched, sav->schedlen); 2916 free(sav->sched, M_IPSEC_MISC); 2917 sav->sched = NULL; 2918 } 2919 if (sav->replay != NULL) { 2920 free(sav->replay, M_IPSEC_MISC); 2921 sav->replay = NULL; 2922 } 2923 if (sav->lft_c != NULL) { 2924 free(sav->lft_c, M_IPSEC_MISC); 2925 sav->lft_c = NULL; 2926 } 2927 if (sav->lft_h != NULL) { 2928 free(sav->lft_h, M_IPSEC_MISC); 2929 sav->lft_h = NULL; 2930 } 2931 if (sav->lft_s != NULL) { 2932 free(sav->lft_s, M_IPSEC_MISC); 2933 sav->lft_s = NULL; 2934 } 2935 } 2936 2937 /* 2938 * free() SA variable entry. 2939 */ 2940 static void 2941 key_delsav(sav) 2942 struct secasvar *sav; 2943 { 2944 IPSEC_ASSERT(sav != NULL, ("null sav")); 2945 IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt)); 2946 2947 /* remove from SA header */ 2948 if (__LIST_CHAINED(sav)) 2949 LIST_REMOVE(sav, chain); 2950 key_cleansav(sav); 2951 SECASVAR_LOCK_DESTROY(sav); 2952 free(sav, M_IPSEC_SA); 2953 } 2954 2955 /* 2956 * search SAD. 2957 * OUT: 2958 * NULL : not found 2959 * others : found, pointer to a SA. 2960 */ 2961 static struct secashead * 2962 key_getsah(saidx) 2963 struct secasindex *saidx; 2964 { 2965 struct secashead *sah; 2966 2967 SAHTREE_LOCK(); 2968 LIST_FOREACH(sah, &V_sahtree, chain) { 2969 if (sah->state == SADB_SASTATE_DEAD) 2970 continue; 2971 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 2972 break; 2973 } 2974 SAHTREE_UNLOCK(); 2975 2976 return sah; 2977 } 2978 2979 /* 2980 * check not to be duplicated SPI. 2981 * NOTE: this function is too slow due to searching all SAD. 2982 * OUT: 2983 * NULL : not found 2984 * others : found, pointer to a SA. 2985 */ 2986 static struct secasvar * 2987 key_checkspidup(saidx, spi) 2988 struct secasindex *saidx; 2989 u_int32_t spi; 2990 { 2991 struct secashead *sah; 2992 struct secasvar *sav; 2993 2994 /* check address family */ 2995 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 2996 ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 2997 __func__)); 2998 return NULL; 2999 } 3000 3001 sav = NULL; 3002 /* check all SAD */ 3003 SAHTREE_LOCK(); 3004 LIST_FOREACH(sah, &V_sahtree, chain) { 3005 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3006 continue; 3007 sav = key_getsavbyspi(sah, spi); 3008 if (sav != NULL) 3009 break; 3010 } 3011 SAHTREE_UNLOCK(); 3012 3013 return sav; 3014 } 3015 3016 /* 3017 * search SAD litmited alive SA, protocol, SPI. 3018 * OUT: 3019 * NULL : not found 3020 * others : found, pointer to a SA. 3021 */ 3022 static struct secasvar * 3023 key_getsavbyspi(sah, spi) 3024 struct secashead *sah; 3025 u_int32_t spi; 3026 { 3027 struct secasvar *sav; 3028 u_int stateidx, state; 3029 3030 sav = NULL; 3031 SAHTREE_LOCK_ASSERT(); 3032 /* search all status */ 3033 for (stateidx = 0; 3034 stateidx < _ARRAYLEN(saorder_state_alive); 3035 stateidx++) { 3036 3037 state = saorder_state_alive[stateidx]; 3038 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3039 3040 /* sanity check */ 3041 if (sav->state != state) { 3042 ipseclog((LOG_DEBUG, "%s: " 3043 "invalid sav->state (queue: %d SA: %d)\n", 3044 __func__, state, sav->state)); 3045 continue; 3046 } 3047 3048 if (sav->spi == spi) 3049 return sav; 3050 } 3051 } 3052 3053 return NULL; 3054 } 3055 3056 /* 3057 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3058 * You must update these if need. 3059 * OUT: 0: success. 3060 * !0: failure. 3061 * 3062 * does not modify mbuf. does not free mbuf on error. 3063 */ 3064 static int 3065 key_setsaval(sav, m, mhp) 3066 struct secasvar *sav; 3067 struct mbuf *m; 3068 const struct sadb_msghdr *mhp; 3069 { 3070 int error = 0; 3071 3072 IPSEC_ASSERT(m != NULL, ("null mbuf")); 3073 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 3074 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 3075 3076 /* initialization */ 3077 sav->replay = NULL; 3078 sav->key_auth = NULL; 3079 sav->key_enc = NULL; 3080 sav->sched = NULL; 3081 sav->schedlen = 0; 3082 sav->iv = NULL; 3083 sav->lft_c = NULL; 3084 sav->lft_h = NULL; 3085 sav->lft_s = NULL; 3086 sav->tdb_xform = NULL; /* transform */ 3087 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3088 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3089 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3090 /* Initialize even if NAT-T not compiled in: */ 3091 sav->natt_type = 0; 3092 sav->natt_esp_frag_len = 0; 3093 3094 /* SA */ 3095 if (mhp->ext[SADB_EXT_SA] != NULL) { 3096 const struct sadb_sa *sa0; 3097 3098 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3099 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3100 error = EINVAL; 3101 goto fail; 3102 } 3103 3104 sav->alg_auth = sa0->sadb_sa_auth; 3105 sav->alg_enc = sa0->sadb_sa_encrypt; 3106 sav->flags = sa0->sadb_sa_flags; 3107 3108 /* replay window */ 3109 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3110 sav->replay = (struct secreplay *) 3111 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO); 3112 if (sav->replay == NULL) { 3113 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3114 __func__)); 3115 error = ENOBUFS; 3116 goto fail; 3117 } 3118 if (sa0->sadb_sa_replay != 0) 3119 sav->replay->bitmap = (caddr_t)(sav->replay+1); 3120 sav->replay->wsize = sa0->sadb_sa_replay; 3121 } 3122 } 3123 3124 /* Authentication keys */ 3125 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3126 const struct sadb_key *key0; 3127 int len; 3128 3129 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3130 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3131 3132 error = 0; 3133 if (len < sizeof(*key0)) { 3134 error = EINVAL; 3135 goto fail; 3136 } 3137 switch (mhp->msg->sadb_msg_satype) { 3138 case SADB_SATYPE_AH: 3139 case SADB_SATYPE_ESP: 3140 case SADB_X_SATYPE_TCPSIGNATURE: 3141 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3142 sav->alg_auth != SADB_X_AALG_NULL) 3143 error = EINVAL; 3144 break; 3145 case SADB_X_SATYPE_IPCOMP: 3146 default: 3147 error = EINVAL; 3148 break; 3149 } 3150 if (error) { 3151 ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n", 3152 __func__)); 3153 goto fail; 3154 } 3155 3156 sav->key_auth = (struct seckey *)key_dup_keymsg(key0, len, 3157 M_IPSEC_MISC); 3158 if (sav->key_auth == NULL ) { 3159 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3160 __func__)); 3161 error = ENOBUFS; 3162 goto fail; 3163 } 3164 } 3165 3166 /* Encryption key */ 3167 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3168 const struct sadb_key *key0; 3169 int len; 3170 3171 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3172 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3173 3174 error = 0; 3175 if (len < sizeof(*key0)) { 3176 error = EINVAL; 3177 goto fail; 3178 } 3179 switch (mhp->msg->sadb_msg_satype) { 3180 case SADB_SATYPE_ESP: 3181 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3182 sav->alg_enc != SADB_EALG_NULL) { 3183 error = EINVAL; 3184 break; 3185 } 3186 sav->key_enc = (struct seckey *)key_dup_keymsg(key0, 3187 len, 3188 M_IPSEC_MISC); 3189 if (sav->key_enc == NULL) { 3190 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3191 __func__)); 3192 error = ENOBUFS; 3193 goto fail; 3194 } 3195 break; 3196 case SADB_X_SATYPE_IPCOMP: 3197 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3198 error = EINVAL; 3199 sav->key_enc = NULL; /*just in case*/ 3200 break; 3201 case SADB_SATYPE_AH: 3202 case SADB_X_SATYPE_TCPSIGNATURE: 3203 default: 3204 error = EINVAL; 3205 break; 3206 } 3207 if (error) { 3208 ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n", 3209 __func__)); 3210 goto fail; 3211 } 3212 } 3213 3214 /* set iv */ 3215 sav->ivlen = 0; 3216 3217 switch (mhp->msg->sadb_msg_satype) { 3218 case SADB_SATYPE_AH: 3219 error = xform_init(sav, XF_AH); 3220 break; 3221 case SADB_SATYPE_ESP: 3222 error = xform_init(sav, XF_ESP); 3223 break; 3224 case SADB_X_SATYPE_IPCOMP: 3225 error = xform_init(sav, XF_IPCOMP); 3226 break; 3227 case SADB_X_SATYPE_TCPSIGNATURE: 3228 error = xform_init(sav, XF_TCPSIGNATURE); 3229 break; 3230 } 3231 if (error) { 3232 ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n", 3233 __func__, mhp->msg->sadb_msg_satype)); 3234 goto fail; 3235 } 3236 3237 /* reset created */ 3238 sav->created = time_second; 3239 3240 /* make lifetime for CURRENT */ 3241 sav->lft_c = malloc(sizeof(struct seclifetime), M_IPSEC_MISC, M_NOWAIT); 3242 if (sav->lft_c == NULL) { 3243 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3244 error = ENOBUFS; 3245 goto fail; 3246 } 3247 3248 sav->lft_c->allocations = 0; 3249 sav->lft_c->bytes = 0; 3250 sav->lft_c->addtime = time_second; 3251 sav->lft_c->usetime = 0; 3252 3253 /* lifetimes for HARD and SOFT */ 3254 { 3255 const struct sadb_lifetime *lft0; 3256 3257 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3258 if (lft0 != NULL) { 3259 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3260 error = EINVAL; 3261 goto fail; 3262 } 3263 sav->lft_h = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3264 if (sav->lft_h == NULL) { 3265 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3266 error = ENOBUFS; 3267 goto fail; 3268 } 3269 /* to be initialize ? */ 3270 } 3271 3272 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3273 if (lft0 != NULL) { 3274 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3275 error = EINVAL; 3276 goto fail; 3277 } 3278 sav->lft_s = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3279 if (sav->lft_s == NULL) { 3280 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3281 error = ENOBUFS; 3282 goto fail; 3283 } 3284 /* to be initialize ? */ 3285 } 3286 } 3287 3288 return 0; 3289 3290 fail: 3291 /* initialization */ 3292 key_cleansav(sav); 3293 3294 return error; 3295 } 3296 3297 /* 3298 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3299 * OUT: 0: valid 3300 * other: errno 3301 */ 3302 static int 3303 key_mature(struct secasvar *sav) 3304 { 3305 int error; 3306 3307 /* check SPI value */ 3308 switch (sav->sah->saidx.proto) { 3309 case IPPROTO_ESP: 3310 case IPPROTO_AH: 3311 /* 3312 * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values 3313 * 1-255 reserved by IANA for future use, 3314 * 0 for implementation specific, local use. 3315 */ 3316 if (ntohl(sav->spi) <= 255) { 3317 ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n", 3318 __func__, (u_int32_t)ntohl(sav->spi))); 3319 return EINVAL; 3320 } 3321 break; 3322 } 3323 3324 /* check satype */ 3325 switch (sav->sah->saidx.proto) { 3326 case IPPROTO_ESP: 3327 /* check flags */ 3328 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3329 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3330 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3331 "given to old-esp.\n", __func__)); 3332 return EINVAL; 3333 } 3334 error = xform_init(sav, XF_ESP); 3335 break; 3336 case IPPROTO_AH: 3337 /* check flags */ 3338 if (sav->flags & SADB_X_EXT_DERIV) { 3339 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3340 "given to AH SA.\n", __func__)); 3341 return EINVAL; 3342 } 3343 if (sav->alg_enc != SADB_EALG_NONE) { 3344 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3345 "mismated.\n", __func__)); 3346 return(EINVAL); 3347 } 3348 error = xform_init(sav, XF_AH); 3349 break; 3350 case IPPROTO_IPCOMP: 3351 if (sav->alg_auth != SADB_AALG_NONE) { 3352 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3353 "mismated.\n", __func__)); 3354 return(EINVAL); 3355 } 3356 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3357 && ntohl(sav->spi) >= 0x10000) { 3358 ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n", 3359 __func__)); 3360 return(EINVAL); 3361 } 3362 error = xform_init(sav, XF_IPCOMP); 3363 break; 3364 case IPPROTO_TCP: 3365 if (sav->alg_enc != SADB_EALG_NONE) { 3366 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3367 "mismated.\n", __func__)); 3368 return(EINVAL); 3369 } 3370 error = xform_init(sav, XF_TCPSIGNATURE); 3371 break; 3372 default: 3373 ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__)); 3374 error = EPROTONOSUPPORT; 3375 break; 3376 } 3377 if (error == 0) { 3378 SAHTREE_LOCK(); 3379 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3380 SAHTREE_UNLOCK(); 3381 } 3382 return (error); 3383 } 3384 3385 /* 3386 * subroutine for SADB_GET and SADB_DUMP. 3387 */ 3388 static struct mbuf * 3389 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3390 u_int32_t seq, u_int32_t pid) 3391 { 3392 struct mbuf *result = NULL, *tres = NULL, *m; 3393 int i; 3394 int dumporder[] = { 3395 SADB_EXT_SA, SADB_X_EXT_SA2, 3396 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3397 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3398 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3399 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3400 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3401 #ifdef IPSEC_NAT_T 3402 SADB_X_EXT_NAT_T_TYPE, 3403 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3404 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3405 SADB_X_EXT_NAT_T_FRAG, 3406 #endif 3407 }; 3408 3409 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3410 if (m == NULL) 3411 goto fail; 3412 result = m; 3413 3414 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3415 m = NULL; 3416 switch (dumporder[i]) { 3417 case SADB_EXT_SA: 3418 m = key_setsadbsa(sav); 3419 if (!m) 3420 goto fail; 3421 break; 3422 3423 case SADB_X_EXT_SA2: 3424 m = key_setsadbxsa2(sav->sah->saidx.mode, 3425 sav->replay ? sav->replay->count : 0, 3426 sav->sah->saidx.reqid); 3427 if (!m) 3428 goto fail; 3429 break; 3430 3431 case SADB_EXT_ADDRESS_SRC: 3432 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3433 &sav->sah->saidx.src.sa, 3434 FULLMASK, IPSEC_ULPROTO_ANY); 3435 if (!m) 3436 goto fail; 3437 break; 3438 3439 case SADB_EXT_ADDRESS_DST: 3440 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3441 &sav->sah->saidx.dst.sa, 3442 FULLMASK, IPSEC_ULPROTO_ANY); 3443 if (!m) 3444 goto fail; 3445 break; 3446 3447 case SADB_EXT_KEY_AUTH: 3448 if (!sav->key_auth) 3449 continue; 3450 m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH); 3451 if (!m) 3452 goto fail; 3453 break; 3454 3455 case SADB_EXT_KEY_ENCRYPT: 3456 if (!sav->key_enc) 3457 continue; 3458 m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT); 3459 if (!m) 3460 goto fail; 3461 break; 3462 3463 case SADB_EXT_LIFETIME_CURRENT: 3464 if (!sav->lft_c) 3465 continue; 3466 m = key_setlifetime(sav->lft_c, 3467 SADB_EXT_LIFETIME_CURRENT); 3468 if (!m) 3469 goto fail; 3470 break; 3471 3472 case SADB_EXT_LIFETIME_HARD: 3473 if (!sav->lft_h) 3474 continue; 3475 m = key_setlifetime(sav->lft_h, 3476 SADB_EXT_LIFETIME_HARD); 3477 if (!m) 3478 goto fail; 3479 break; 3480 3481 case SADB_EXT_LIFETIME_SOFT: 3482 if (!sav->lft_s) 3483 continue; 3484 m = key_setlifetime(sav->lft_s, 3485 SADB_EXT_LIFETIME_SOFT); 3486 3487 if (!m) 3488 goto fail; 3489 break; 3490 3491 #ifdef IPSEC_NAT_T 3492 case SADB_X_EXT_NAT_T_TYPE: 3493 m = key_setsadbxtype(sav->natt_type); 3494 if (!m) 3495 goto fail; 3496 break; 3497 3498 case SADB_X_EXT_NAT_T_DPORT: 3499 m = key_setsadbxport( 3500 KEY_PORTFROMSADDR(&sav->sah->saidx.dst), 3501 SADB_X_EXT_NAT_T_DPORT); 3502 if (!m) 3503 goto fail; 3504 break; 3505 3506 case SADB_X_EXT_NAT_T_SPORT: 3507 m = key_setsadbxport( 3508 KEY_PORTFROMSADDR(&sav->sah->saidx.src), 3509 SADB_X_EXT_NAT_T_SPORT); 3510 if (!m) 3511 goto fail; 3512 break; 3513 3514 case SADB_X_EXT_NAT_T_OAI: 3515 case SADB_X_EXT_NAT_T_OAR: 3516 case SADB_X_EXT_NAT_T_FRAG: 3517 /* We do not (yet) support those. */ 3518 continue; 3519 #endif 3520 3521 case SADB_EXT_ADDRESS_PROXY: 3522 case SADB_EXT_IDENTITY_SRC: 3523 case SADB_EXT_IDENTITY_DST: 3524 /* XXX: should we brought from SPD ? */ 3525 case SADB_EXT_SENSITIVITY: 3526 default: 3527 continue; 3528 } 3529 3530 if (!m) 3531 goto fail; 3532 if (tres) 3533 m_cat(m, tres); 3534 tres = m; 3535 3536 } 3537 3538 m_cat(result, tres); 3539 if (result->m_len < sizeof(struct sadb_msg)) { 3540 result = m_pullup(result, sizeof(struct sadb_msg)); 3541 if (result == NULL) 3542 goto fail; 3543 } 3544 3545 result->m_pkthdr.len = 0; 3546 for (m = result; m; m = m->m_next) 3547 result->m_pkthdr.len += m->m_len; 3548 3549 mtod(result, struct sadb_msg *)->sadb_msg_len = 3550 PFKEY_UNIT64(result->m_pkthdr.len); 3551 3552 return result; 3553 3554 fail: 3555 m_freem(result); 3556 m_freem(tres); 3557 return NULL; 3558 } 3559 3560 /* 3561 * set data into sadb_msg. 3562 */ 3563 static struct mbuf * 3564 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq, 3565 pid_t pid, u_int16_t reserved) 3566 { 3567 struct mbuf *m; 3568 struct sadb_msg *p; 3569 int len; 3570 3571 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3572 if (len > MCLBYTES) 3573 return NULL; 3574 MGETHDR(m, M_DONTWAIT, MT_DATA); 3575 if (m && len > MHLEN) { 3576 MCLGET(m, M_DONTWAIT); 3577 if ((m->m_flags & M_EXT) == 0) { 3578 m_freem(m); 3579 m = NULL; 3580 } 3581 } 3582 if (!m) 3583 return NULL; 3584 m->m_pkthdr.len = m->m_len = len; 3585 m->m_next = NULL; 3586 3587 p = mtod(m, struct sadb_msg *); 3588 3589 bzero(p, len); 3590 p->sadb_msg_version = PF_KEY_V2; 3591 p->sadb_msg_type = type; 3592 p->sadb_msg_errno = 0; 3593 p->sadb_msg_satype = satype; 3594 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3595 p->sadb_msg_reserved = reserved; 3596 p->sadb_msg_seq = seq; 3597 p->sadb_msg_pid = (u_int32_t)pid; 3598 3599 return m; 3600 } 3601 3602 /* 3603 * copy secasvar data into sadb_address. 3604 */ 3605 static struct mbuf * 3606 key_setsadbsa(sav) 3607 struct secasvar *sav; 3608 { 3609 struct mbuf *m; 3610 struct sadb_sa *p; 3611 int len; 3612 3613 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3614 m = key_alloc_mbuf(len); 3615 if (!m || m->m_next) { /*XXX*/ 3616 if (m) 3617 m_freem(m); 3618 return NULL; 3619 } 3620 3621 p = mtod(m, struct sadb_sa *); 3622 3623 bzero(p, len); 3624 p->sadb_sa_len = PFKEY_UNIT64(len); 3625 p->sadb_sa_exttype = SADB_EXT_SA; 3626 p->sadb_sa_spi = sav->spi; 3627 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3628 p->sadb_sa_state = sav->state; 3629 p->sadb_sa_auth = sav->alg_auth; 3630 p->sadb_sa_encrypt = sav->alg_enc; 3631 p->sadb_sa_flags = sav->flags; 3632 3633 return m; 3634 } 3635 3636 /* 3637 * set data into sadb_address. 3638 */ 3639 static struct mbuf * 3640 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto) 3641 { 3642 struct mbuf *m; 3643 struct sadb_address *p; 3644 size_t len; 3645 3646 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3647 PFKEY_ALIGN8(saddr->sa_len); 3648 m = key_alloc_mbuf(len); 3649 if (!m || m->m_next) { /*XXX*/ 3650 if (m) 3651 m_freem(m); 3652 return NULL; 3653 } 3654 3655 p = mtod(m, struct sadb_address *); 3656 3657 bzero(p, len); 3658 p->sadb_address_len = PFKEY_UNIT64(len); 3659 p->sadb_address_exttype = exttype; 3660 p->sadb_address_proto = ul_proto; 3661 if (prefixlen == FULLMASK) { 3662 switch (saddr->sa_family) { 3663 case AF_INET: 3664 prefixlen = sizeof(struct in_addr) << 3; 3665 break; 3666 case AF_INET6: 3667 prefixlen = sizeof(struct in6_addr) << 3; 3668 break; 3669 default: 3670 ; /*XXX*/ 3671 } 3672 } 3673 p->sadb_address_prefixlen = prefixlen; 3674 p->sadb_address_reserved = 0; 3675 3676 bcopy(saddr, 3677 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3678 saddr->sa_len); 3679 3680 return m; 3681 } 3682 3683 /* 3684 * set data into sadb_x_sa2. 3685 */ 3686 static struct mbuf * 3687 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid) 3688 { 3689 struct mbuf *m; 3690 struct sadb_x_sa2 *p; 3691 size_t len; 3692 3693 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3694 m = key_alloc_mbuf(len); 3695 if (!m || m->m_next) { /*XXX*/ 3696 if (m) 3697 m_freem(m); 3698 return NULL; 3699 } 3700 3701 p = mtod(m, struct sadb_x_sa2 *); 3702 3703 bzero(p, len); 3704 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3705 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3706 p->sadb_x_sa2_mode = mode; 3707 p->sadb_x_sa2_reserved1 = 0; 3708 p->sadb_x_sa2_reserved2 = 0; 3709 p->sadb_x_sa2_sequence = seq; 3710 p->sadb_x_sa2_reqid = reqid; 3711 3712 return m; 3713 } 3714 3715 #ifdef IPSEC_NAT_T 3716 /* 3717 * Set a type in sadb_x_nat_t_type. 3718 */ 3719 static struct mbuf * 3720 key_setsadbxtype(u_int16_t type) 3721 { 3722 struct mbuf *m; 3723 size_t len; 3724 struct sadb_x_nat_t_type *p; 3725 3726 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3727 3728 m = key_alloc_mbuf(len); 3729 if (!m || m->m_next) { /*XXX*/ 3730 if (m) 3731 m_freem(m); 3732 return (NULL); 3733 } 3734 3735 p = mtod(m, struct sadb_x_nat_t_type *); 3736 3737 bzero(p, len); 3738 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3739 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3740 p->sadb_x_nat_t_type_type = type; 3741 3742 return (m); 3743 } 3744 /* 3745 * Set a port in sadb_x_nat_t_port. 3746 * In contrast to default RFC 2367 behaviour, port is in network byte order. 3747 */ 3748 static struct mbuf * 3749 key_setsadbxport(u_int16_t port, u_int16_t type) 3750 { 3751 struct mbuf *m; 3752 size_t len; 3753 struct sadb_x_nat_t_port *p; 3754 3755 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3756 3757 m = key_alloc_mbuf(len); 3758 if (!m || m->m_next) { /*XXX*/ 3759 if (m) 3760 m_freem(m); 3761 return (NULL); 3762 } 3763 3764 p = mtod(m, struct sadb_x_nat_t_port *); 3765 3766 bzero(p, len); 3767 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3768 p->sadb_x_nat_t_port_exttype = type; 3769 p->sadb_x_nat_t_port_port = port; 3770 3771 return (m); 3772 } 3773 3774 /* 3775 * Get port from sockaddr. Port is in network byte order. 3776 */ 3777 u_int16_t 3778 key_portfromsaddr(struct sockaddr *sa) 3779 { 3780 3781 switch (sa->sa_family) { 3782 #ifdef INET 3783 case AF_INET: 3784 return ((struct sockaddr_in *)sa)->sin_port; 3785 #endif 3786 #ifdef INET6 3787 case AF_INET6: 3788 return ((struct sockaddr_in6 *)sa)->sin6_port; 3789 #endif 3790 } 3791 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3792 printf("DP %s unexpected address family %d\n", 3793 __func__, sa->sa_family)); 3794 return (0); 3795 } 3796 #endif /* IPSEC_NAT_T */ 3797 3798 /* 3799 * Set port in struct sockaddr. Port is in network byte order. 3800 */ 3801 static void 3802 key_porttosaddr(struct sockaddr *sa, u_int16_t port) 3803 { 3804 3805 switch (sa->sa_family) { 3806 #ifdef INET 3807 case AF_INET: 3808 ((struct sockaddr_in *)sa)->sin_port = port; 3809 break; 3810 #endif 3811 #ifdef INET6 3812 case AF_INET6: 3813 ((struct sockaddr_in6 *)sa)->sin6_port = port; 3814 break; 3815 #endif 3816 default: 3817 ipseclog((LOG_DEBUG, "%s: unexpected address family %d.\n", 3818 __func__, sa->sa_family)); 3819 break; 3820 } 3821 } 3822 3823 /* 3824 * set data into sadb_x_policy 3825 */ 3826 static struct mbuf * 3827 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3828 { 3829 struct mbuf *m; 3830 struct sadb_x_policy *p; 3831 size_t len; 3832 3833 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3834 m = key_alloc_mbuf(len); 3835 if (!m || m->m_next) { /*XXX*/ 3836 if (m) 3837 m_freem(m); 3838 return NULL; 3839 } 3840 3841 p = mtod(m, struct sadb_x_policy *); 3842 3843 bzero(p, len); 3844 p->sadb_x_policy_len = PFKEY_UNIT64(len); 3845 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3846 p->sadb_x_policy_type = type; 3847 p->sadb_x_policy_dir = dir; 3848 p->sadb_x_policy_id = id; 3849 3850 return m; 3851 } 3852 3853 /* %%% utilities */ 3854 /* Take a key message (sadb_key) from the socket and turn it into one 3855 * of the kernel's key structures (seckey). 3856 * 3857 * IN: pointer to the src 3858 * OUT: NULL no more memory 3859 */ 3860 struct seckey * 3861 key_dup_keymsg(const struct sadb_key *src, u_int len, 3862 struct malloc_type *type) 3863 { 3864 struct seckey *dst; 3865 dst = (struct seckey *)malloc(sizeof(struct seckey), type, M_NOWAIT); 3866 if (dst != NULL) { 3867 dst->bits = src->sadb_key_bits; 3868 dst->key_data = (char *)malloc(len, type, M_NOWAIT); 3869 if (dst->key_data != NULL) { 3870 bcopy((const char *)src + sizeof(struct sadb_key), 3871 dst->key_data, len); 3872 } else { 3873 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3874 __func__)); 3875 free(dst, type); 3876 dst = NULL; 3877 } 3878 } else { 3879 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3880 __func__)); 3881 3882 } 3883 return dst; 3884 } 3885 3886 /* Take a lifetime message (sadb_lifetime) passed in on a socket and 3887 * turn it into one of the kernel's lifetime structures (seclifetime). 3888 * 3889 * IN: pointer to the destination, source and malloc type 3890 * OUT: NULL, no more memory 3891 */ 3892 3893 static struct seclifetime * 3894 key_dup_lifemsg(const struct sadb_lifetime *src, 3895 struct malloc_type *type) 3896 { 3897 struct seclifetime *dst = NULL; 3898 3899 dst = (struct seclifetime *)malloc(sizeof(struct seclifetime), 3900 type, M_NOWAIT); 3901 if (dst == NULL) { 3902 /* XXX counter */ 3903 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3904 } else { 3905 dst->allocations = src->sadb_lifetime_allocations; 3906 dst->bytes = src->sadb_lifetime_bytes; 3907 dst->addtime = src->sadb_lifetime_addtime; 3908 dst->usetime = src->sadb_lifetime_usetime; 3909 } 3910 return dst; 3911 } 3912 3913 /* compare my own address 3914 * OUT: 1: true, i.e. my address. 3915 * 0: false 3916 */ 3917 int 3918 key_ismyaddr(sa) 3919 struct sockaddr *sa; 3920 { 3921 #ifdef INET 3922 struct sockaddr_in *sin; 3923 struct in_ifaddr *ia; 3924 #endif 3925 3926 IPSEC_ASSERT(sa != NULL, ("null sockaddr")); 3927 3928 switch (sa->sa_family) { 3929 #ifdef INET 3930 case AF_INET: 3931 sin = (struct sockaddr_in *)sa; 3932 IN_IFADDR_RLOCK(); 3933 for (ia = V_in_ifaddrhead.tqh_first; ia; 3934 ia = ia->ia_link.tqe_next) 3935 { 3936 if (sin->sin_family == ia->ia_addr.sin_family && 3937 sin->sin_len == ia->ia_addr.sin_len && 3938 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3939 { 3940 IN_IFADDR_RUNLOCK(); 3941 return 1; 3942 } 3943 } 3944 IN_IFADDR_RUNLOCK(); 3945 break; 3946 #endif 3947 #ifdef INET6 3948 case AF_INET6: 3949 return key_ismyaddr6((struct sockaddr_in6 *)sa); 3950 #endif 3951 } 3952 3953 return 0; 3954 } 3955 3956 #ifdef INET6 3957 /* 3958 * compare my own address for IPv6. 3959 * 1: ours 3960 * 0: other 3961 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3962 */ 3963 #include <netinet6/in6_var.h> 3964 3965 static int 3966 key_ismyaddr6(sin6) 3967 struct sockaddr_in6 *sin6; 3968 { 3969 struct in6_ifaddr *ia; 3970 #if 0 3971 struct in6_multi *in6m; 3972 #endif 3973 3974 IN6_IFADDR_RLOCK(); 3975 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 3976 if (key_sockaddrcmp((struct sockaddr *)&sin6, 3977 (struct sockaddr *)&ia->ia_addr, 0) == 0) { 3978 IN6_IFADDR_RUNLOCK(); 3979 return 1; 3980 } 3981 3982 #if 0 3983 /* 3984 * XXX Multicast 3985 * XXX why do we care about multlicast here while we don't care 3986 * about IPv4 multicast?? 3987 * XXX scope 3988 */ 3989 in6m = NULL; 3990 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3991 if (in6m) { 3992 IN6_IFADDR_RUNLOCK(); 3993 return 1; 3994 } 3995 #endif 3996 } 3997 IN6_IFADDR_RUNLOCK(); 3998 3999 /* loopback, just for safety */ 4000 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4001 return 1; 4002 4003 return 0; 4004 } 4005 #endif /*INET6*/ 4006 4007 /* 4008 * compare two secasindex structure. 4009 * flag can specify to compare 2 saidxes. 4010 * compare two secasindex structure without both mode and reqid. 4011 * don't compare port. 4012 * IN: 4013 * saidx0: source, it can be in SAD. 4014 * saidx1: object. 4015 * OUT: 4016 * 1 : equal 4017 * 0 : not equal 4018 */ 4019 static int 4020 key_cmpsaidx( 4021 const struct secasindex *saidx0, 4022 const struct secasindex *saidx1, 4023 int flag) 4024 { 4025 int chkport = 0; 4026 4027 /* sanity */ 4028 if (saidx0 == NULL && saidx1 == NULL) 4029 return 1; 4030 4031 if (saidx0 == NULL || saidx1 == NULL) 4032 return 0; 4033 4034 if (saidx0->proto != saidx1->proto) 4035 return 0; 4036 4037 if (flag == CMP_EXACTLY) { 4038 if (saidx0->mode != saidx1->mode) 4039 return 0; 4040 if (saidx0->reqid != saidx1->reqid) 4041 return 0; 4042 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4043 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4044 return 0; 4045 } else { 4046 4047 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4048 if (flag == CMP_MODE_REQID 4049 ||flag == CMP_REQID) { 4050 /* 4051 * If reqid of SPD is non-zero, unique SA is required. 4052 * The result must be of same reqid in this case. 4053 */ 4054 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4055 return 0; 4056 } 4057 4058 if (flag == CMP_MODE_REQID) { 4059 if (saidx0->mode != IPSEC_MODE_ANY 4060 && saidx0->mode != saidx1->mode) 4061 return 0; 4062 } 4063 4064 #ifdef IPSEC_NAT_T 4065 /* 4066 * If NAT-T is enabled, check ports for tunnel mode. 4067 * Do not check ports if they are set to zero in the SPD. 4068 * Also do not do it for transport mode, as there is no 4069 * port information available in the SP. 4070 */ 4071 if (saidx1->mode == IPSEC_MODE_TUNNEL && 4072 saidx1->src.sa.sa_family == AF_INET && 4073 saidx1->dst.sa.sa_family == AF_INET && 4074 ((const struct sockaddr_in *)(&saidx1->src))->sin_port && 4075 ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) 4076 chkport = 1; 4077 #endif /* IPSEC_NAT_T */ 4078 4079 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4080 return 0; 4081 } 4082 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4083 return 0; 4084 } 4085 } 4086 4087 return 1; 4088 } 4089 4090 /* 4091 * compare two secindex structure exactly. 4092 * IN: 4093 * spidx0: source, it is often in SPD. 4094 * spidx1: object, it is often from PFKEY message. 4095 * OUT: 4096 * 1 : equal 4097 * 0 : not equal 4098 */ 4099 static int 4100 key_cmpspidx_exactly( 4101 struct secpolicyindex *spidx0, 4102 struct secpolicyindex *spidx1) 4103 { 4104 /* sanity */ 4105 if (spidx0 == NULL && spidx1 == NULL) 4106 return 1; 4107 4108 if (spidx0 == NULL || spidx1 == NULL) 4109 return 0; 4110 4111 if (spidx0->prefs != spidx1->prefs 4112 || spidx0->prefd != spidx1->prefd 4113 || spidx0->ul_proto != spidx1->ul_proto) 4114 return 0; 4115 4116 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4117 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4118 } 4119 4120 /* 4121 * compare two secindex structure with mask. 4122 * IN: 4123 * spidx0: source, it is often in SPD. 4124 * spidx1: object, it is often from IP header. 4125 * OUT: 4126 * 1 : equal 4127 * 0 : not equal 4128 */ 4129 static int 4130 key_cmpspidx_withmask( 4131 struct secpolicyindex *spidx0, 4132 struct secpolicyindex *spidx1) 4133 { 4134 /* sanity */ 4135 if (spidx0 == NULL && spidx1 == NULL) 4136 return 1; 4137 4138 if (spidx0 == NULL || spidx1 == NULL) 4139 return 0; 4140 4141 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4142 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4143 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4144 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4145 return 0; 4146 4147 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4148 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4149 && spidx0->ul_proto != spidx1->ul_proto) 4150 return 0; 4151 4152 switch (spidx0->src.sa.sa_family) { 4153 case AF_INET: 4154 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4155 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4156 return 0; 4157 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4158 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4159 return 0; 4160 break; 4161 case AF_INET6: 4162 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4163 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4164 return 0; 4165 /* 4166 * scope_id check. if sin6_scope_id is 0, we regard it 4167 * as a wildcard scope, which matches any scope zone ID. 4168 */ 4169 if (spidx0->src.sin6.sin6_scope_id && 4170 spidx1->src.sin6.sin6_scope_id && 4171 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4172 return 0; 4173 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4174 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4175 return 0; 4176 break; 4177 default: 4178 /* XXX */ 4179 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4180 return 0; 4181 break; 4182 } 4183 4184 switch (spidx0->dst.sa.sa_family) { 4185 case AF_INET: 4186 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4187 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4188 return 0; 4189 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4190 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4191 return 0; 4192 break; 4193 case AF_INET6: 4194 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4195 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4196 return 0; 4197 /* 4198 * scope_id check. if sin6_scope_id is 0, we regard it 4199 * as a wildcard scope, which matches any scope zone ID. 4200 */ 4201 if (spidx0->dst.sin6.sin6_scope_id && 4202 spidx1->dst.sin6.sin6_scope_id && 4203 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4204 return 0; 4205 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4206 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4207 return 0; 4208 break; 4209 default: 4210 /* XXX */ 4211 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4212 return 0; 4213 break; 4214 } 4215 4216 /* XXX Do we check other field ? e.g. flowinfo */ 4217 4218 return 1; 4219 } 4220 4221 /* returns 0 on match */ 4222 static int 4223 key_sockaddrcmp( 4224 const struct sockaddr *sa1, 4225 const struct sockaddr *sa2, 4226 int port) 4227 { 4228 #ifdef satosin 4229 #undef satosin 4230 #endif 4231 #define satosin(s) ((const struct sockaddr_in *)s) 4232 #ifdef satosin6 4233 #undef satosin6 4234 #endif 4235 #define satosin6(s) ((const struct sockaddr_in6 *)s) 4236 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4237 return 1; 4238 4239 switch (sa1->sa_family) { 4240 case AF_INET: 4241 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4242 return 1; 4243 if (satosin(sa1)->sin_addr.s_addr != 4244 satosin(sa2)->sin_addr.s_addr) { 4245 return 1; 4246 } 4247 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4248 return 1; 4249 break; 4250 case AF_INET6: 4251 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4252 return 1; /*EINVAL*/ 4253 if (satosin6(sa1)->sin6_scope_id != 4254 satosin6(sa2)->sin6_scope_id) { 4255 return 1; 4256 } 4257 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4258 &satosin6(sa2)->sin6_addr)) { 4259 return 1; 4260 } 4261 if (port && 4262 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4263 return 1; 4264 } 4265 break; 4266 default: 4267 if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4268 return 1; 4269 break; 4270 } 4271 4272 return 0; 4273 #undef satosin 4274 #undef satosin6 4275 } 4276 4277 /* 4278 * compare two buffers with mask. 4279 * IN: 4280 * addr1: source 4281 * addr2: object 4282 * bits: Number of bits to compare 4283 * OUT: 4284 * 1 : equal 4285 * 0 : not equal 4286 */ 4287 static int 4288 key_bbcmp(const void *a1, const void *a2, u_int bits) 4289 { 4290 const unsigned char *p1 = a1; 4291 const unsigned char *p2 = a2; 4292 4293 /* XXX: This could be considerably faster if we compare a word 4294 * at a time, but it is complicated on LSB Endian machines */ 4295 4296 /* Handle null pointers */ 4297 if (p1 == NULL || p2 == NULL) 4298 return (p1 == p2); 4299 4300 while (bits >= 8) { 4301 if (*p1++ != *p2++) 4302 return 0; 4303 bits -= 8; 4304 } 4305 4306 if (bits > 0) { 4307 u_int8_t mask = ~((1<<(8-bits))-1); 4308 if ((*p1 & mask) != (*p2 & mask)) 4309 return 0; 4310 } 4311 return 1; /* Match! */ 4312 } 4313 4314 static void 4315 key_flush_spd(time_t now) 4316 { 4317 static u_int16_t sptree_scangen = 0; 4318 u_int16_t gen = sptree_scangen++; 4319 struct secpolicy *sp; 4320 u_int dir; 4321 4322 /* SPD */ 4323 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4324 restart: 4325 SPTREE_LOCK(); 4326 LIST_FOREACH(sp, &V_sptree[dir], chain) { 4327 if (sp->scangen == gen) /* previously handled */ 4328 continue; 4329 sp->scangen = gen; 4330 if (sp->state == IPSEC_SPSTATE_DEAD && 4331 sp->refcnt == 1) { 4332 /* 4333 * Ensure that we only decrease refcnt once, 4334 * when we're the last consumer. 4335 * Directly call SP_DELREF/key_delsp instead 4336 * of KEY_FREESP to avoid unlocking/relocking 4337 * SPTREE_LOCK before key_delsp: may refcnt 4338 * be increased again during that time ? 4339 * NB: also clean entries created by 4340 * key_spdflush 4341 */ 4342 SP_DELREF(sp); 4343 key_delsp(sp); 4344 SPTREE_UNLOCK(); 4345 goto restart; 4346 } 4347 if (sp->lifetime == 0 && sp->validtime == 0) 4348 continue; 4349 if ((sp->lifetime && now - sp->created > sp->lifetime) 4350 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4351 sp->state = IPSEC_SPSTATE_DEAD; 4352 SPTREE_UNLOCK(); 4353 key_spdexpire(sp); 4354 goto restart; 4355 } 4356 } 4357 SPTREE_UNLOCK(); 4358 } 4359 } 4360 4361 static void 4362 key_flush_sad(time_t now) 4363 { 4364 struct secashead *sah, *nextsah; 4365 struct secasvar *sav, *nextsav; 4366 4367 /* SAD */ 4368 SAHTREE_LOCK(); 4369 LIST_FOREACH_SAFE(sah, &V_sahtree, chain, nextsah) { 4370 /* if sah has been dead, then delete it and process next sah. */ 4371 if (sah->state == SADB_SASTATE_DEAD) { 4372 key_delsah(sah); 4373 continue; 4374 } 4375 4376 /* if LARVAL entry doesn't become MATURE, delete it. */ 4377 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) { 4378 /* Need to also check refcnt for a larval SA ??? */ 4379 if (now - sav->created > V_key_larval_lifetime) 4380 KEY_FREESAV(&sav); 4381 } 4382 4383 /* 4384 * check MATURE entry to start to send expire message 4385 * whether or not. 4386 */ 4387 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) { 4388 /* we don't need to check. */ 4389 if (sav->lft_s == NULL) 4390 continue; 4391 4392 /* sanity check */ 4393 if (sav->lft_c == NULL) { 4394 ipseclog((LOG_DEBUG,"%s: there is no CURRENT " 4395 "time, why?\n", __func__)); 4396 continue; 4397 } 4398 4399 /* check SOFT lifetime */ 4400 if (sav->lft_s->addtime != 0 && 4401 now - sav->created > sav->lft_s->addtime) { 4402 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4403 /* 4404 * Actually, only send expire message if 4405 * SA has been used, as it was done before, 4406 * but should we always send such message, 4407 * and let IKE daemon decide if it should be 4408 * renegotiated or not ? 4409 * XXX expire message will actually NOT be 4410 * sent if SA is only used after soft 4411 * lifetime has been reached, see below 4412 * (DYING state) 4413 */ 4414 if (sav->lft_c->usetime != 0) 4415 key_expire(sav); 4416 } 4417 /* check SOFT lifetime by bytes */ 4418 /* 4419 * XXX I don't know the way to delete this SA 4420 * when new SA is installed. Caution when it's 4421 * installed too big lifetime by time. 4422 */ 4423 else if (sav->lft_s->bytes != 0 && 4424 sav->lft_s->bytes < sav->lft_c->bytes) { 4425 4426 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4427 /* 4428 * XXX If we keep to send expire 4429 * message in the status of 4430 * DYING. Do remove below code. 4431 */ 4432 key_expire(sav); 4433 } 4434 } 4435 4436 /* check DYING entry to change status to DEAD. */ 4437 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) { 4438 /* we don't need to check. */ 4439 if (sav->lft_h == NULL) 4440 continue; 4441 4442 /* sanity check */ 4443 if (sav->lft_c == NULL) { 4444 ipseclog((LOG_DEBUG, "%s: there is no CURRENT " 4445 "time, why?\n", __func__)); 4446 continue; 4447 } 4448 4449 if (sav->lft_h->addtime != 0 && 4450 now - sav->created > sav->lft_h->addtime) { 4451 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4452 KEY_FREESAV(&sav); 4453 } 4454 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4455 else if (sav->lft_s != NULL 4456 && sav->lft_s->addtime != 0 4457 && now - sav->created > sav->lft_s->addtime) { 4458 /* 4459 * XXX: should be checked to be 4460 * installed the valid SA. 4461 */ 4462 4463 /* 4464 * If there is no SA then sending 4465 * expire message. 4466 */ 4467 key_expire(sav); 4468 } 4469 #endif 4470 /* check HARD lifetime by bytes */ 4471 else if (sav->lft_h->bytes != 0 && 4472 sav->lft_h->bytes < sav->lft_c->bytes) { 4473 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4474 KEY_FREESAV(&sav); 4475 } 4476 } 4477 4478 /* delete entry in DEAD */ 4479 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) { 4480 /* sanity check */ 4481 if (sav->state != SADB_SASTATE_DEAD) { 4482 ipseclog((LOG_DEBUG, "%s: invalid sav->state " 4483 "(queue: %d SA: %d): kill it anyway\n", 4484 __func__, 4485 SADB_SASTATE_DEAD, sav->state)); 4486 } 4487 /* 4488 * do not call key_freesav() here. 4489 * sav should already be freed, and sav->refcnt 4490 * shows other references to sav 4491 * (such as from SPD). 4492 */ 4493 } 4494 } 4495 SAHTREE_UNLOCK(); 4496 } 4497 4498 static void 4499 key_flush_acq(time_t now) 4500 { 4501 struct secacq *acq, *nextacq; 4502 4503 /* ACQ tree */ 4504 ACQ_LOCK(); 4505 for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 4506 nextacq = LIST_NEXT(acq, chain); 4507 if (now - acq->created > V_key_blockacq_lifetime 4508 && __LIST_CHAINED(acq)) { 4509 LIST_REMOVE(acq, chain); 4510 free(acq, M_IPSEC_SAQ); 4511 } 4512 } 4513 ACQ_UNLOCK(); 4514 } 4515 4516 static void 4517 key_flush_spacq(time_t now) 4518 { 4519 struct secspacq *acq, *nextacq; 4520 4521 /* SP ACQ tree */ 4522 SPACQ_LOCK(); 4523 for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 4524 nextacq = LIST_NEXT(acq, chain); 4525 if (now - acq->created > V_key_blockacq_lifetime 4526 && __LIST_CHAINED(acq)) { 4527 LIST_REMOVE(acq, chain); 4528 free(acq, M_IPSEC_SAQ); 4529 } 4530 } 4531 SPACQ_UNLOCK(); 4532 } 4533 4534 /* 4535 * time handler. 4536 * scanning SPD and SAD to check status for each entries, 4537 * and do to remove or to expire. 4538 * XXX: year 2038 problem may remain. 4539 */ 4540 void 4541 key_timehandler(void) 4542 { 4543 VNET_ITERATOR_DECL(vnet_iter); 4544 time_t now = time_second; 4545 4546 VNET_LIST_RLOCK_NOSLEEP(); 4547 VNET_FOREACH(vnet_iter) { 4548 CURVNET_SET(vnet_iter); 4549 key_flush_spd(now); 4550 key_flush_sad(now); 4551 key_flush_acq(now); 4552 key_flush_spacq(now); 4553 CURVNET_RESTORE(); 4554 } 4555 VNET_LIST_RUNLOCK_NOSLEEP(); 4556 4557 #ifndef IPSEC_DEBUG2 4558 /* do exchange to tick time !! */ 4559 (void)timeout((void *)key_timehandler, (void *)0, hz); 4560 #endif /* IPSEC_DEBUG2 */ 4561 } 4562 4563 u_long 4564 key_random() 4565 { 4566 u_long value; 4567 4568 key_randomfill(&value, sizeof(value)); 4569 return value; 4570 } 4571 4572 void 4573 key_randomfill(p, l) 4574 void *p; 4575 size_t l; 4576 { 4577 size_t n; 4578 u_long v; 4579 static int warn = 1; 4580 4581 n = 0; 4582 n = (size_t)read_random(p, (u_int)l); 4583 /* last resort */ 4584 while (n < l) { 4585 v = random(); 4586 bcopy(&v, (u_int8_t *)p + n, 4587 l - n < sizeof(v) ? l - n : sizeof(v)); 4588 n += sizeof(v); 4589 4590 if (warn) { 4591 printf("WARNING: pseudo-random number generator " 4592 "used for IPsec processing\n"); 4593 warn = 0; 4594 } 4595 } 4596 } 4597 4598 /* 4599 * map SADB_SATYPE_* to IPPROTO_*. 4600 * if satype == SADB_SATYPE then satype is mapped to ~0. 4601 * OUT: 4602 * 0: invalid satype. 4603 */ 4604 static u_int16_t 4605 key_satype2proto(u_int8_t satype) 4606 { 4607 switch (satype) { 4608 case SADB_SATYPE_UNSPEC: 4609 return IPSEC_PROTO_ANY; 4610 case SADB_SATYPE_AH: 4611 return IPPROTO_AH; 4612 case SADB_SATYPE_ESP: 4613 return IPPROTO_ESP; 4614 case SADB_X_SATYPE_IPCOMP: 4615 return IPPROTO_IPCOMP; 4616 case SADB_X_SATYPE_TCPSIGNATURE: 4617 return IPPROTO_TCP; 4618 default: 4619 return 0; 4620 } 4621 /* NOTREACHED */ 4622 } 4623 4624 /* 4625 * map IPPROTO_* to SADB_SATYPE_* 4626 * OUT: 4627 * 0: invalid protocol type. 4628 */ 4629 static u_int8_t 4630 key_proto2satype(u_int16_t proto) 4631 { 4632 switch (proto) { 4633 case IPPROTO_AH: 4634 return SADB_SATYPE_AH; 4635 case IPPROTO_ESP: 4636 return SADB_SATYPE_ESP; 4637 case IPPROTO_IPCOMP: 4638 return SADB_X_SATYPE_IPCOMP; 4639 case IPPROTO_TCP: 4640 return SADB_X_SATYPE_TCPSIGNATURE; 4641 default: 4642 return 0; 4643 } 4644 /* NOTREACHED */ 4645 } 4646 4647 /* %%% PF_KEY */ 4648 /* 4649 * SADB_GETSPI processing is to receive 4650 * <base, (SA2), src address, dst address, (SPI range)> 4651 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4652 * tree with the status of LARVAL, and send 4653 * <base, SA(*), address(SD)> 4654 * to the IKMPd. 4655 * 4656 * IN: mhp: pointer to the pointer to each header. 4657 * OUT: NULL if fail. 4658 * other if success, return pointer to the message to send. 4659 */ 4660 static int 4661 key_getspi(so, m, mhp) 4662 struct socket *so; 4663 struct mbuf *m; 4664 const struct sadb_msghdr *mhp; 4665 { 4666 struct sadb_address *src0, *dst0; 4667 struct secasindex saidx; 4668 struct secashead *newsah; 4669 struct secasvar *newsav; 4670 u_int8_t proto; 4671 u_int32_t spi; 4672 u_int8_t mode; 4673 u_int32_t reqid; 4674 int error; 4675 4676 IPSEC_ASSERT(so != NULL, ("null socket")); 4677 IPSEC_ASSERT(m != NULL, ("null mbuf")); 4678 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4679 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4680 4681 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4682 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4683 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4684 __func__)); 4685 return key_senderror(so, m, EINVAL); 4686 } 4687 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4688 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4689 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4690 __func__)); 4691 return key_senderror(so, m, EINVAL); 4692 } 4693 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4694 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4695 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4696 } else { 4697 mode = IPSEC_MODE_ANY; 4698 reqid = 0; 4699 } 4700 4701 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4702 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4703 4704 /* map satype to proto */ 4705 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4706 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4707 __func__)); 4708 return key_senderror(so, m, EINVAL); 4709 } 4710 4711 /* 4712 * Make sure the port numbers are zero. 4713 * In case of NAT-T we will update them later if needed. 4714 */ 4715 switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4716 case AF_INET: 4717 if (((struct sockaddr *)(src0 + 1))->sa_len != 4718 sizeof(struct sockaddr_in)) 4719 return key_senderror(so, m, EINVAL); 4720 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4721 break; 4722 case AF_INET6: 4723 if (((struct sockaddr *)(src0 + 1))->sa_len != 4724 sizeof(struct sockaddr_in6)) 4725 return key_senderror(so, m, EINVAL); 4726 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4727 break; 4728 default: 4729 ; /*???*/ 4730 } 4731 switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4732 case AF_INET: 4733 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4734 sizeof(struct sockaddr_in)) 4735 return key_senderror(so, m, EINVAL); 4736 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4737 break; 4738 case AF_INET6: 4739 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4740 sizeof(struct sockaddr_in6)) 4741 return key_senderror(so, m, EINVAL); 4742 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4743 break; 4744 default: 4745 ; /*???*/ 4746 } 4747 4748 /* XXX boundary check against sa_len */ 4749 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4750 4751 #ifdef IPSEC_NAT_T 4752 /* 4753 * Handle NAT-T info if present. 4754 * We made sure the port numbers are zero above, so we do 4755 * not have to worry in case we do not update them. 4756 */ 4757 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 4758 ipseclog((LOG_DEBUG, "%s: NAT-T OAi present\n", __func__)); 4759 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 4760 ipseclog((LOG_DEBUG, "%s: NAT-T OAr present\n", __func__)); 4761 4762 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 4763 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 4764 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 4765 struct sadb_x_nat_t_type *type; 4766 struct sadb_x_nat_t_port *sport, *dport; 4767 4768 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 4769 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 4770 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 4771 ipseclog((LOG_DEBUG, "%s: invalid nat-t message " 4772 "passed.\n", __func__)); 4773 return key_senderror(so, m, EINVAL); 4774 } 4775 4776 sport = (struct sadb_x_nat_t_port *) 4777 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 4778 dport = (struct sadb_x_nat_t_port *) 4779 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 4780 4781 if (sport) 4782 KEY_PORTTOSADDR(&saidx.src, sport->sadb_x_nat_t_port_port); 4783 if (dport) 4784 KEY_PORTTOSADDR(&saidx.dst, dport->sadb_x_nat_t_port_port); 4785 } 4786 #endif 4787 4788 /* SPI allocation */ 4789 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4790 &saidx); 4791 if (spi == 0) 4792 return key_senderror(so, m, EINVAL); 4793 4794 /* get a SA index */ 4795 if ((newsah = key_getsah(&saidx)) == NULL) { 4796 /* create a new SA index */ 4797 if ((newsah = key_newsah(&saidx)) == NULL) { 4798 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4799 return key_senderror(so, m, ENOBUFS); 4800 } 4801 } 4802 4803 /* get a new SA */ 4804 /* XXX rewrite */ 4805 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4806 if (newsav == NULL) { 4807 /* XXX don't free new SA index allocated in above. */ 4808 return key_senderror(so, m, error); 4809 } 4810 4811 /* set spi */ 4812 newsav->spi = htonl(spi); 4813 4814 /* delete the entry in acqtree */ 4815 if (mhp->msg->sadb_msg_seq != 0) { 4816 struct secacq *acq; 4817 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4818 /* reset counter in order to deletion by timehandler. */ 4819 acq->created = time_second; 4820 acq->count = 0; 4821 } 4822 } 4823 4824 { 4825 struct mbuf *n, *nn; 4826 struct sadb_sa *m_sa; 4827 struct sadb_msg *newmsg; 4828 int off, len; 4829 4830 /* create new sadb_msg to reply. */ 4831 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4832 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4833 4834 MGETHDR(n, M_DONTWAIT, MT_DATA); 4835 if (len > MHLEN) { 4836 MCLGET(n, M_DONTWAIT); 4837 if ((n->m_flags & M_EXT) == 0) { 4838 m_freem(n); 4839 n = NULL; 4840 } 4841 } 4842 if (!n) 4843 return key_senderror(so, m, ENOBUFS); 4844 4845 n->m_len = len; 4846 n->m_next = NULL; 4847 off = 0; 4848 4849 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 4850 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4851 4852 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); 4853 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4854 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4855 m_sa->sadb_sa_spi = htonl(spi); 4856 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4857 4858 IPSEC_ASSERT(off == len, 4859 ("length inconsistency (off %u len %u)", off, len)); 4860 4861 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4862 SADB_EXT_ADDRESS_DST); 4863 if (!n->m_next) { 4864 m_freem(n); 4865 return key_senderror(so, m, ENOBUFS); 4866 } 4867 4868 if (n->m_len < sizeof(struct sadb_msg)) { 4869 n = m_pullup(n, sizeof(struct sadb_msg)); 4870 if (n == NULL) 4871 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4872 } 4873 4874 n->m_pkthdr.len = 0; 4875 for (nn = n; nn; nn = nn->m_next) 4876 n->m_pkthdr.len += nn->m_len; 4877 4878 newmsg = mtod(n, struct sadb_msg *); 4879 newmsg->sadb_msg_seq = newsav->seq; 4880 newmsg->sadb_msg_errno = 0; 4881 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4882 4883 m_freem(m); 4884 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4885 } 4886 } 4887 4888 /* 4889 * allocating new SPI 4890 * called by key_getspi(). 4891 * OUT: 4892 * 0: failure. 4893 * others: success. 4894 */ 4895 static u_int32_t 4896 key_do_getnewspi(spirange, saidx) 4897 struct sadb_spirange *spirange; 4898 struct secasindex *saidx; 4899 { 4900 u_int32_t newspi; 4901 u_int32_t min, max; 4902 int count = V_key_spi_trycnt; 4903 4904 /* set spi range to allocate */ 4905 if (spirange != NULL) { 4906 min = spirange->sadb_spirange_min; 4907 max = spirange->sadb_spirange_max; 4908 } else { 4909 min = V_key_spi_minval; 4910 max = V_key_spi_maxval; 4911 } 4912 /* IPCOMP needs 2-byte SPI */ 4913 if (saidx->proto == IPPROTO_IPCOMP) { 4914 u_int32_t t; 4915 if (min >= 0x10000) 4916 min = 0xffff; 4917 if (max >= 0x10000) 4918 max = 0xffff; 4919 if (min > max) { 4920 t = min; min = max; max = t; 4921 } 4922 } 4923 4924 if (min == max) { 4925 if (key_checkspidup(saidx, min) != NULL) { 4926 ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n", 4927 __func__, min)); 4928 return 0; 4929 } 4930 4931 count--; /* taking one cost. */ 4932 newspi = min; 4933 4934 } else { 4935 4936 /* init SPI */ 4937 newspi = 0; 4938 4939 /* when requesting to allocate spi ranged */ 4940 while (count--) { 4941 /* generate pseudo-random SPI value ranged. */ 4942 newspi = min + (key_random() % (max - min + 1)); 4943 4944 if (key_checkspidup(saidx, newspi) == NULL) 4945 break; 4946 } 4947 4948 if (count == 0 || newspi == 0) { 4949 ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n", 4950 __func__)); 4951 return 0; 4952 } 4953 } 4954 4955 /* statistics */ 4956 keystat.getspi_count = 4957 (keystat.getspi_count + V_key_spi_trycnt - count) / 2; 4958 4959 return newspi; 4960 } 4961 4962 /* 4963 * SADB_UPDATE processing 4964 * receive 4965 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4966 * key(AE), (identity(SD),) (sensitivity)> 4967 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4968 * and send 4969 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4970 * (identity(SD),) (sensitivity)> 4971 * to the ikmpd. 4972 * 4973 * m will always be freed. 4974 */ 4975 static int 4976 key_update(so, m, mhp) 4977 struct socket *so; 4978 struct mbuf *m; 4979 const struct sadb_msghdr *mhp; 4980 { 4981 struct sadb_sa *sa0; 4982 struct sadb_address *src0, *dst0; 4983 #ifdef IPSEC_NAT_T 4984 struct sadb_x_nat_t_type *type; 4985 struct sadb_x_nat_t_port *sport, *dport; 4986 struct sadb_address *iaddr, *raddr; 4987 struct sadb_x_nat_t_frag *frag; 4988 #endif 4989 struct secasindex saidx; 4990 struct secashead *sah; 4991 struct secasvar *sav; 4992 u_int16_t proto; 4993 u_int8_t mode; 4994 u_int32_t reqid; 4995 int error; 4996 4997 IPSEC_ASSERT(so != NULL, ("null socket")); 4998 IPSEC_ASSERT(m != NULL, ("null mbuf")); 4999 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5000 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5001 5002 /* map satype to proto */ 5003 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5004 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5005 __func__)); 5006 return key_senderror(so, m, EINVAL); 5007 } 5008 5009 if (mhp->ext[SADB_EXT_SA] == NULL || 5010 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5011 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5012 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5013 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5014 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5015 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5016 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5017 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5018 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5019 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5020 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5021 __func__)); 5022 return key_senderror(so, m, EINVAL); 5023 } 5024 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5025 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5026 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5027 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5028 __func__)); 5029 return key_senderror(so, m, EINVAL); 5030 } 5031 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5032 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5033 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5034 } else { 5035 mode = IPSEC_MODE_ANY; 5036 reqid = 0; 5037 } 5038 /* XXX boundary checking for other extensions */ 5039 5040 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5041 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5042 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5043 5044 /* XXX boundary check against sa_len */ 5045 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5046 5047 /* 5048 * Make sure the port numbers are zero. 5049 * In case of NAT-T we will update them later if needed. 5050 */ 5051 KEY_PORTTOSADDR(&saidx.src, 0); 5052 KEY_PORTTOSADDR(&saidx.dst, 0); 5053 5054 #ifdef IPSEC_NAT_T 5055 /* 5056 * Handle NAT-T info if present. 5057 */ 5058 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5059 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5060 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5061 5062 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5063 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5064 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5065 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5066 __func__)); 5067 return key_senderror(so, m, EINVAL); 5068 } 5069 5070 type = (struct sadb_x_nat_t_type *) 5071 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5072 sport = (struct sadb_x_nat_t_port *) 5073 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5074 dport = (struct sadb_x_nat_t_port *) 5075 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5076 } else { 5077 type = 0; 5078 sport = dport = 0; 5079 } 5080 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5081 mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5082 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5083 mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5084 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5085 __func__)); 5086 return key_senderror(so, m, EINVAL); 5087 } 5088 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5089 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5090 ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5091 } else { 5092 iaddr = raddr = NULL; 5093 } 5094 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5095 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5096 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5097 __func__)); 5098 return key_senderror(so, m, EINVAL); 5099 } 5100 frag = (struct sadb_x_nat_t_frag *) 5101 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5102 } else { 5103 frag = 0; 5104 } 5105 #endif 5106 5107 /* get a SA header */ 5108 if ((sah = key_getsah(&saidx)) == NULL) { 5109 ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__)); 5110 return key_senderror(so, m, ENOENT); 5111 } 5112 5113 /* set spidx if there */ 5114 /* XXX rewrite */ 5115 error = key_setident(sah, m, mhp); 5116 if (error) 5117 return key_senderror(so, m, error); 5118 5119 /* find a SA with sequence number. */ 5120 #ifdef IPSEC_DOSEQCHECK 5121 if (mhp->msg->sadb_msg_seq != 0 5122 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5123 ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u " 5124 "exists.\n", __func__, mhp->msg->sadb_msg_seq)); 5125 return key_senderror(so, m, ENOENT); 5126 } 5127 #else 5128 SAHTREE_LOCK(); 5129 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5130 SAHTREE_UNLOCK(); 5131 if (sav == NULL) { 5132 ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n", 5133 __func__, (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5134 return key_senderror(so, m, EINVAL); 5135 } 5136 #endif 5137 5138 /* validity check */ 5139 if (sav->sah->saidx.proto != proto) { 5140 ipseclog((LOG_DEBUG, "%s: protocol mismatched " 5141 "(DB=%u param=%u)\n", __func__, 5142 sav->sah->saidx.proto, proto)); 5143 return key_senderror(so, m, EINVAL); 5144 } 5145 #ifdef IPSEC_DOSEQCHECK 5146 if (sav->spi != sa0->sadb_sa_spi) { 5147 ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n", 5148 __func__, 5149 (u_int32_t)ntohl(sav->spi), 5150 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5151 return key_senderror(so, m, EINVAL); 5152 } 5153 #endif 5154 if (sav->pid != mhp->msg->sadb_msg_pid) { 5155 ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n", 5156 __func__, sav->pid, mhp->msg->sadb_msg_pid)); 5157 return key_senderror(so, m, EINVAL); 5158 } 5159 5160 /* copy sav values */ 5161 error = key_setsaval(sav, m, mhp); 5162 if (error) { 5163 KEY_FREESAV(&sav); 5164 return key_senderror(so, m, error); 5165 } 5166 5167 #ifdef IPSEC_NAT_T 5168 /* 5169 * Handle more NAT-T info if present, 5170 * now that we have a sav to fill. 5171 */ 5172 if (type) 5173 sav->natt_type = type->sadb_x_nat_t_type_type; 5174 5175 if (sport) 5176 KEY_PORTTOSADDR(&sav->sah->saidx.src, 5177 sport->sadb_x_nat_t_port_port); 5178 if (dport) 5179 KEY_PORTTOSADDR(&sav->sah->saidx.dst, 5180 dport->sadb_x_nat_t_port_port); 5181 5182 #if 0 5183 /* 5184 * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5185 * We should actually check for a minimum MTU here, if we 5186 * want to support it in ip_output. 5187 */ 5188 if (frag) 5189 sav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5190 #endif 5191 #endif 5192 5193 /* check SA values to be mature. */ 5194 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5195 KEY_FREESAV(&sav); 5196 return key_senderror(so, m, 0); 5197 } 5198 5199 { 5200 struct mbuf *n; 5201 5202 /* set msg buf from mhp */ 5203 n = key_getmsgbuf_x1(m, mhp); 5204 if (n == NULL) { 5205 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5206 return key_senderror(so, m, ENOBUFS); 5207 } 5208 5209 m_freem(m); 5210 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5211 } 5212 } 5213 5214 /* 5215 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5216 * only called by key_update(). 5217 * OUT: 5218 * NULL : not found 5219 * others : found, pointer to a SA. 5220 */ 5221 #ifdef IPSEC_DOSEQCHECK 5222 static struct secasvar * 5223 key_getsavbyseq(sah, seq) 5224 struct secashead *sah; 5225 u_int32_t seq; 5226 { 5227 struct secasvar *sav; 5228 u_int state; 5229 5230 state = SADB_SASTATE_LARVAL; 5231 5232 /* search SAD with sequence number ? */ 5233 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5234 5235 KEY_CHKSASTATE(state, sav->state, __func__); 5236 5237 if (sav->seq == seq) { 5238 sa_addref(sav); 5239 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5240 printf("DP %s cause refcnt++:%d SA:%p\n", 5241 __func__, sav->refcnt, sav)); 5242 return sav; 5243 } 5244 } 5245 5246 return NULL; 5247 } 5248 #endif 5249 5250 /* 5251 * SADB_ADD processing 5252 * add an entry to SA database, when received 5253 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5254 * key(AE), (identity(SD),) (sensitivity)> 5255 * from the ikmpd, 5256 * and send 5257 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5258 * (identity(SD),) (sensitivity)> 5259 * to the ikmpd. 5260 * 5261 * IGNORE identity and sensitivity messages. 5262 * 5263 * m will always be freed. 5264 */ 5265 static int 5266 key_add(so, m, mhp) 5267 struct socket *so; 5268 struct mbuf *m; 5269 const struct sadb_msghdr *mhp; 5270 { 5271 struct sadb_sa *sa0; 5272 struct sadb_address *src0, *dst0; 5273 #ifdef IPSEC_NAT_T 5274 struct sadb_x_nat_t_type *type; 5275 struct sadb_address *iaddr, *raddr; 5276 struct sadb_x_nat_t_frag *frag; 5277 #endif 5278 struct secasindex saidx; 5279 struct secashead *newsah; 5280 struct secasvar *newsav; 5281 u_int16_t proto; 5282 u_int8_t mode; 5283 u_int32_t reqid; 5284 int error; 5285 5286 IPSEC_ASSERT(so != NULL, ("null socket")); 5287 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5288 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5289 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5290 5291 /* map satype to proto */ 5292 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5293 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5294 __func__)); 5295 return key_senderror(so, m, EINVAL); 5296 } 5297 5298 if (mhp->ext[SADB_EXT_SA] == NULL || 5299 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5300 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5301 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5302 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5303 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5304 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5305 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5306 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5307 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5308 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5309 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5310 __func__)); 5311 return key_senderror(so, m, EINVAL); 5312 } 5313 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5314 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5315 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5316 /* XXX need more */ 5317 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5318 __func__)); 5319 return key_senderror(so, m, EINVAL); 5320 } 5321 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5322 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5323 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5324 } else { 5325 mode = IPSEC_MODE_ANY; 5326 reqid = 0; 5327 } 5328 5329 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5330 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5331 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5332 5333 /* XXX boundary check against sa_len */ 5334 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5335 5336 /* 5337 * Make sure the port numbers are zero. 5338 * In case of NAT-T we will update them later if needed. 5339 */ 5340 KEY_PORTTOSADDR(&saidx.src, 0); 5341 KEY_PORTTOSADDR(&saidx.dst, 0); 5342 5343 #ifdef IPSEC_NAT_T 5344 /* 5345 * Handle NAT-T info if present. 5346 */ 5347 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5348 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5349 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5350 struct sadb_x_nat_t_port *sport, *dport; 5351 5352 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5353 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5354 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5355 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5356 __func__)); 5357 return key_senderror(so, m, EINVAL); 5358 } 5359 5360 type = (struct sadb_x_nat_t_type *) 5361 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5362 sport = (struct sadb_x_nat_t_port *) 5363 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5364 dport = (struct sadb_x_nat_t_port *) 5365 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5366 5367 if (sport) 5368 KEY_PORTTOSADDR(&saidx.src, 5369 sport->sadb_x_nat_t_port_port); 5370 if (dport) 5371 KEY_PORTTOSADDR(&saidx.dst, 5372 dport->sadb_x_nat_t_port_port); 5373 } else { 5374 type = 0; 5375 } 5376 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5377 mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5378 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5379 mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5380 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5381 __func__)); 5382 return key_senderror(so, m, EINVAL); 5383 } 5384 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5385 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5386 ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5387 } else { 5388 iaddr = raddr = NULL; 5389 } 5390 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5391 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5392 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5393 __func__)); 5394 return key_senderror(so, m, EINVAL); 5395 } 5396 frag = (struct sadb_x_nat_t_frag *) 5397 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5398 } else { 5399 frag = 0; 5400 } 5401 #endif 5402 5403 /* get a SA header */ 5404 if ((newsah = key_getsah(&saidx)) == NULL) { 5405 /* create a new SA header */ 5406 if ((newsah = key_newsah(&saidx)) == NULL) { 5407 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 5408 return key_senderror(so, m, ENOBUFS); 5409 } 5410 } 5411 5412 /* set spidx if there */ 5413 /* XXX rewrite */ 5414 error = key_setident(newsah, m, mhp); 5415 if (error) { 5416 return key_senderror(so, m, error); 5417 } 5418 5419 /* create new SA entry. */ 5420 /* We can create new SA only if SPI is differenct. */ 5421 SAHTREE_LOCK(); 5422 newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 5423 SAHTREE_UNLOCK(); 5424 if (newsav != NULL) { 5425 ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__)); 5426 return key_senderror(so, m, EEXIST); 5427 } 5428 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5429 if (newsav == NULL) { 5430 return key_senderror(so, m, error); 5431 } 5432 5433 #ifdef IPSEC_NAT_T 5434 /* 5435 * Handle more NAT-T info if present, 5436 * now that we have a sav to fill. 5437 */ 5438 if (type) 5439 newsav->natt_type = type->sadb_x_nat_t_type_type; 5440 5441 #if 0 5442 /* 5443 * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5444 * We should actually check for a minimum MTU here, if we 5445 * want to support it in ip_output. 5446 */ 5447 if (frag) 5448 newsav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5449 #endif 5450 #endif 5451 5452 /* check SA values to be mature. */ 5453 if ((error = key_mature(newsav)) != 0) { 5454 KEY_FREESAV(&newsav); 5455 return key_senderror(so, m, error); 5456 } 5457 5458 /* 5459 * don't call key_freesav() here, as we would like to keep the SA 5460 * in the database on success. 5461 */ 5462 5463 { 5464 struct mbuf *n; 5465 5466 /* set msg buf from mhp */ 5467 n = key_getmsgbuf_x1(m, mhp); 5468 if (n == NULL) { 5469 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5470 return key_senderror(so, m, ENOBUFS); 5471 } 5472 5473 m_freem(m); 5474 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5475 } 5476 } 5477 5478 /* m is retained */ 5479 static int 5480 key_setident(sah, m, mhp) 5481 struct secashead *sah; 5482 struct mbuf *m; 5483 const struct sadb_msghdr *mhp; 5484 { 5485 const struct sadb_ident *idsrc, *iddst; 5486 int idsrclen, iddstlen; 5487 5488 IPSEC_ASSERT(sah != NULL, ("null secashead")); 5489 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5490 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5491 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5492 5493 /* don't make buffer if not there */ 5494 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5495 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5496 sah->idents = NULL; 5497 sah->identd = NULL; 5498 return 0; 5499 } 5500 5501 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5502 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5503 ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__)); 5504 return EINVAL; 5505 } 5506 5507 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5508 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5509 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5510 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5511 5512 /* validity check */ 5513 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5514 ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__)); 5515 return EINVAL; 5516 } 5517 5518 switch (idsrc->sadb_ident_type) { 5519 case SADB_IDENTTYPE_PREFIX: 5520 case SADB_IDENTTYPE_FQDN: 5521 case SADB_IDENTTYPE_USERFQDN: 5522 default: 5523 /* XXX do nothing */ 5524 sah->idents = NULL; 5525 sah->identd = NULL; 5526 return 0; 5527 } 5528 5529 /* make structure */ 5530 sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5531 if (sah->idents == NULL) { 5532 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5533 return ENOBUFS; 5534 } 5535 sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5536 if (sah->identd == NULL) { 5537 free(sah->idents, M_IPSEC_MISC); 5538 sah->idents = NULL; 5539 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5540 return ENOBUFS; 5541 } 5542 sah->idents->type = idsrc->sadb_ident_type; 5543 sah->idents->id = idsrc->sadb_ident_id; 5544 5545 sah->identd->type = iddst->sadb_ident_type; 5546 sah->identd->id = iddst->sadb_ident_id; 5547 5548 return 0; 5549 } 5550 5551 /* 5552 * m will not be freed on return. 5553 * it is caller's responsibility to free the result. 5554 */ 5555 static struct mbuf * 5556 key_getmsgbuf_x1(m, mhp) 5557 struct mbuf *m; 5558 const struct sadb_msghdr *mhp; 5559 { 5560 struct mbuf *n; 5561 5562 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5563 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5564 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5565 5566 /* create new sadb_msg to reply. */ 5567 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5568 SADB_EXT_SA, SADB_X_EXT_SA2, 5569 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5570 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5571 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5572 if (!n) 5573 return NULL; 5574 5575 if (n->m_len < sizeof(struct sadb_msg)) { 5576 n = m_pullup(n, sizeof(struct sadb_msg)); 5577 if (n == NULL) 5578 return NULL; 5579 } 5580 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5581 mtod(n, struct sadb_msg *)->sadb_msg_len = 5582 PFKEY_UNIT64(n->m_pkthdr.len); 5583 5584 return n; 5585 } 5586 5587 static int key_delete_all __P((struct socket *, struct mbuf *, 5588 const struct sadb_msghdr *, u_int16_t)); 5589 5590 /* 5591 * SADB_DELETE processing 5592 * receive 5593 * <base, SA(*), address(SD)> 5594 * from the ikmpd, and set SADB_SASTATE_DEAD, 5595 * and send, 5596 * <base, SA(*), address(SD)> 5597 * to the ikmpd. 5598 * 5599 * m will always be freed. 5600 */ 5601 static int 5602 key_delete(so, m, mhp) 5603 struct socket *so; 5604 struct mbuf *m; 5605 const struct sadb_msghdr *mhp; 5606 { 5607 struct sadb_sa *sa0; 5608 struct sadb_address *src0, *dst0; 5609 struct secasindex saidx; 5610 struct secashead *sah; 5611 struct secasvar *sav = NULL; 5612 u_int16_t proto; 5613 5614 IPSEC_ASSERT(so != NULL, ("null socket")); 5615 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5616 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5617 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5618 5619 /* map satype to proto */ 5620 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5621 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5622 __func__)); 5623 return key_senderror(so, m, EINVAL); 5624 } 5625 5626 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5627 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5628 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5629 __func__)); 5630 return key_senderror(so, m, EINVAL); 5631 } 5632 5633 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5634 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5635 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5636 __func__)); 5637 return key_senderror(so, m, EINVAL); 5638 } 5639 5640 if (mhp->ext[SADB_EXT_SA] == NULL) { 5641 /* 5642 * Caller wants us to delete all non-LARVAL SAs 5643 * that match the src/dst. This is used during 5644 * IKE INITIAL-CONTACT. 5645 */ 5646 ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__)); 5647 return key_delete_all(so, m, mhp, proto); 5648 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5649 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5650 __func__)); 5651 return key_senderror(so, m, EINVAL); 5652 } 5653 5654 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5655 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5656 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5657 5658 /* XXX boundary check against sa_len */ 5659 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5660 5661 /* 5662 * Make sure the port numbers are zero. 5663 * In case of NAT-T we will update them later if needed. 5664 */ 5665 KEY_PORTTOSADDR(&saidx.src, 0); 5666 KEY_PORTTOSADDR(&saidx.dst, 0); 5667 5668 #ifdef IPSEC_NAT_T 5669 /* 5670 * Handle NAT-T info if present. 5671 */ 5672 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5673 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5674 struct sadb_x_nat_t_port *sport, *dport; 5675 5676 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5677 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5678 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5679 __func__)); 5680 return key_senderror(so, m, EINVAL); 5681 } 5682 5683 sport = (struct sadb_x_nat_t_port *) 5684 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5685 dport = (struct sadb_x_nat_t_port *) 5686 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5687 5688 if (sport) 5689 KEY_PORTTOSADDR(&saidx.src, 5690 sport->sadb_x_nat_t_port_port); 5691 if (dport) 5692 KEY_PORTTOSADDR(&saidx.dst, 5693 dport->sadb_x_nat_t_port_port); 5694 } 5695 #endif 5696 5697 /* get a SA header */ 5698 SAHTREE_LOCK(); 5699 LIST_FOREACH(sah, &V_sahtree, chain) { 5700 if (sah->state == SADB_SASTATE_DEAD) 5701 continue; 5702 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5703 continue; 5704 5705 /* get a SA with SPI. */ 5706 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5707 if (sav) 5708 break; 5709 } 5710 if (sah == NULL) { 5711 SAHTREE_UNLOCK(); 5712 ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5713 return key_senderror(so, m, ENOENT); 5714 } 5715 5716 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5717 KEY_FREESAV(&sav); 5718 SAHTREE_UNLOCK(); 5719 5720 { 5721 struct mbuf *n; 5722 struct sadb_msg *newmsg; 5723 5724 /* create new sadb_msg to reply. */ 5725 /* XXX-BZ NAT-T extensions? */ 5726 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5727 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5728 if (!n) 5729 return key_senderror(so, m, ENOBUFS); 5730 5731 if (n->m_len < sizeof(struct sadb_msg)) { 5732 n = m_pullup(n, sizeof(struct sadb_msg)); 5733 if (n == NULL) 5734 return key_senderror(so, m, ENOBUFS); 5735 } 5736 newmsg = mtod(n, struct sadb_msg *); 5737 newmsg->sadb_msg_errno = 0; 5738 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5739 5740 m_freem(m); 5741 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5742 } 5743 } 5744 5745 /* 5746 * delete all SAs for src/dst. Called from key_delete(). 5747 */ 5748 static int 5749 key_delete_all(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp, 5750 u_int16_t proto) 5751 { 5752 struct sadb_address *src0, *dst0; 5753 struct secasindex saidx; 5754 struct secashead *sah; 5755 struct secasvar *sav, *nextsav; 5756 u_int stateidx, state; 5757 5758 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5759 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5760 5761 /* XXX boundary check against sa_len */ 5762 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5763 5764 /* 5765 * Make sure the port numbers are zero. 5766 * In case of NAT-T we will update them later if needed. 5767 */ 5768 KEY_PORTTOSADDR(&saidx.src, 0); 5769 KEY_PORTTOSADDR(&saidx.dst, 0); 5770 5771 #ifdef IPSEC_NAT_T 5772 /* 5773 * Handle NAT-T info if present. 5774 */ 5775 5776 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5777 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5778 struct sadb_x_nat_t_port *sport, *dport; 5779 5780 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5781 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5782 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5783 __func__)); 5784 return key_senderror(so, m, EINVAL); 5785 } 5786 5787 sport = (struct sadb_x_nat_t_port *) 5788 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5789 dport = (struct sadb_x_nat_t_port *) 5790 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5791 5792 if (sport) 5793 KEY_PORTTOSADDR(&saidx.src, 5794 sport->sadb_x_nat_t_port_port); 5795 if (dport) 5796 KEY_PORTTOSADDR(&saidx.dst, 5797 dport->sadb_x_nat_t_port_port); 5798 } 5799 #endif 5800 5801 SAHTREE_LOCK(); 5802 LIST_FOREACH(sah, &V_sahtree, chain) { 5803 if (sah->state == SADB_SASTATE_DEAD) 5804 continue; 5805 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5806 continue; 5807 5808 /* Delete all non-LARVAL SAs. */ 5809 for (stateidx = 0; 5810 stateidx < _ARRAYLEN(saorder_state_alive); 5811 stateidx++) { 5812 state = saorder_state_alive[stateidx]; 5813 if (state == SADB_SASTATE_LARVAL) 5814 continue; 5815 for (sav = LIST_FIRST(&sah->savtree[state]); 5816 sav != NULL; sav = nextsav) { 5817 nextsav = LIST_NEXT(sav, chain); 5818 /* sanity check */ 5819 if (sav->state != state) { 5820 ipseclog((LOG_DEBUG, "%s: invalid " 5821 "sav->state (queue %d SA %d)\n", 5822 __func__, state, sav->state)); 5823 continue; 5824 } 5825 5826 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5827 KEY_FREESAV(&sav); 5828 } 5829 } 5830 } 5831 SAHTREE_UNLOCK(); 5832 { 5833 struct mbuf *n; 5834 struct sadb_msg *newmsg; 5835 5836 /* create new sadb_msg to reply. */ 5837 /* XXX-BZ NAT-T extensions? */ 5838 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5839 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5840 if (!n) 5841 return key_senderror(so, m, ENOBUFS); 5842 5843 if (n->m_len < sizeof(struct sadb_msg)) { 5844 n = m_pullup(n, sizeof(struct sadb_msg)); 5845 if (n == NULL) 5846 return key_senderror(so, m, ENOBUFS); 5847 } 5848 newmsg = mtod(n, struct sadb_msg *); 5849 newmsg->sadb_msg_errno = 0; 5850 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5851 5852 m_freem(m); 5853 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5854 } 5855 } 5856 5857 /* 5858 * SADB_GET processing 5859 * receive 5860 * <base, SA(*), address(SD)> 5861 * from the ikmpd, and get a SP and a SA to respond, 5862 * and send, 5863 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5864 * (identity(SD),) (sensitivity)> 5865 * to the ikmpd. 5866 * 5867 * m will always be freed. 5868 */ 5869 static int 5870 key_get(so, m, mhp) 5871 struct socket *so; 5872 struct mbuf *m; 5873 const struct sadb_msghdr *mhp; 5874 { 5875 struct sadb_sa *sa0; 5876 struct sadb_address *src0, *dst0; 5877 struct secasindex saidx; 5878 struct secashead *sah; 5879 struct secasvar *sav = NULL; 5880 u_int16_t proto; 5881 5882 IPSEC_ASSERT(so != NULL, ("null socket")); 5883 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5884 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5885 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5886 5887 /* map satype to proto */ 5888 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5889 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5890 __func__)); 5891 return key_senderror(so, m, EINVAL); 5892 } 5893 5894 if (mhp->ext[SADB_EXT_SA] == NULL || 5895 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5896 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5897 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5898 __func__)); 5899 return key_senderror(so, m, EINVAL); 5900 } 5901 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5902 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5903 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5904 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5905 __func__)); 5906 return key_senderror(so, m, EINVAL); 5907 } 5908 5909 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5910 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5911 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5912 5913 /* XXX boundary check against sa_len */ 5914 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5915 5916 /* 5917 * Make sure the port numbers are zero. 5918 * In case of NAT-T we will update them later if needed. 5919 */ 5920 KEY_PORTTOSADDR(&saidx.src, 0); 5921 KEY_PORTTOSADDR(&saidx.dst, 0); 5922 5923 #ifdef IPSEC_NAT_T 5924 /* 5925 * Handle NAT-T info if present. 5926 */ 5927 5928 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5929 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5930 struct sadb_x_nat_t_port *sport, *dport; 5931 5932 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5933 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5934 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5935 __func__)); 5936 return key_senderror(so, m, EINVAL); 5937 } 5938 5939 sport = (struct sadb_x_nat_t_port *) 5940 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5941 dport = (struct sadb_x_nat_t_port *) 5942 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5943 5944 if (sport) 5945 KEY_PORTTOSADDR(&saidx.src, 5946 sport->sadb_x_nat_t_port_port); 5947 if (dport) 5948 KEY_PORTTOSADDR(&saidx.dst, 5949 dport->sadb_x_nat_t_port_port); 5950 } 5951 #endif 5952 5953 /* get a SA header */ 5954 SAHTREE_LOCK(); 5955 LIST_FOREACH(sah, &V_sahtree, chain) { 5956 if (sah->state == SADB_SASTATE_DEAD) 5957 continue; 5958 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5959 continue; 5960 5961 /* get a SA with SPI. */ 5962 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5963 if (sav) 5964 break; 5965 } 5966 SAHTREE_UNLOCK(); 5967 if (sah == NULL) { 5968 ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5969 return key_senderror(so, m, ENOENT); 5970 } 5971 5972 { 5973 struct mbuf *n; 5974 u_int8_t satype; 5975 5976 /* map proto to satype */ 5977 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5978 ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n", 5979 __func__)); 5980 return key_senderror(so, m, EINVAL); 5981 } 5982 5983 /* create new sadb_msg to reply. */ 5984 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5985 mhp->msg->sadb_msg_pid); 5986 if (!n) 5987 return key_senderror(so, m, ENOBUFS); 5988 5989 m_freem(m); 5990 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5991 } 5992 } 5993 5994 /* XXX make it sysctl-configurable? */ 5995 static void 5996 key_getcomb_setlifetime(comb) 5997 struct sadb_comb *comb; 5998 { 5999 6000 comb->sadb_comb_soft_allocations = 1; 6001 comb->sadb_comb_hard_allocations = 1; 6002 comb->sadb_comb_soft_bytes = 0; 6003 comb->sadb_comb_hard_bytes = 0; 6004 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 6005 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 6006 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 6007 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 6008 } 6009 6010 /* 6011 * XXX reorder combinations by preference 6012 * XXX no idea if the user wants ESP authentication or not 6013 */ 6014 static struct mbuf * 6015 key_getcomb_esp() 6016 { 6017 struct sadb_comb *comb; 6018 struct enc_xform *algo; 6019 struct mbuf *result = NULL, *m, *n; 6020 int encmin; 6021 int i, off, o; 6022 int totlen; 6023 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6024 6025 m = NULL; 6026 for (i = 1; i <= SADB_EALG_MAX; i++) { 6027 algo = esp_algorithm_lookup(i); 6028 if (algo == NULL) 6029 continue; 6030 6031 /* discard algorithms with key size smaller than system min */ 6032 if (_BITS(algo->maxkey) < V_ipsec_esp_keymin) 6033 continue; 6034 if (_BITS(algo->minkey) < V_ipsec_esp_keymin) 6035 encmin = V_ipsec_esp_keymin; 6036 else 6037 encmin = _BITS(algo->minkey); 6038 6039 if (V_ipsec_esp_auth) 6040 m = key_getcomb_ah(); 6041 else { 6042 IPSEC_ASSERT(l <= MLEN, 6043 ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6044 MGET(m, M_DONTWAIT, MT_DATA); 6045 if (m) { 6046 M_ALIGN(m, l); 6047 m->m_len = l; 6048 m->m_next = NULL; 6049 bzero(mtod(m, caddr_t), m->m_len); 6050 } 6051 } 6052 if (!m) 6053 goto fail; 6054 6055 totlen = 0; 6056 for (n = m; n; n = n->m_next) 6057 totlen += n->m_len; 6058 IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l)); 6059 6060 for (off = 0; off < totlen; off += l) { 6061 n = m_pulldown(m, off, l, &o); 6062 if (!n) { 6063 /* m is already freed */ 6064 goto fail; 6065 } 6066 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); 6067 bzero(comb, sizeof(*comb)); 6068 key_getcomb_setlifetime(comb); 6069 comb->sadb_comb_encrypt = i; 6070 comb->sadb_comb_encrypt_minbits = encmin; 6071 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6072 } 6073 6074 if (!result) 6075 result = m; 6076 else 6077 m_cat(result, m); 6078 } 6079 6080 return result; 6081 6082 fail: 6083 if (result) 6084 m_freem(result); 6085 return NULL; 6086 } 6087 6088 static void 6089 key_getsizes_ah( 6090 const struct auth_hash *ah, 6091 int alg, 6092 u_int16_t* min, 6093 u_int16_t* max) 6094 { 6095 6096 *min = *max = ah->keysize; 6097 if (ah->keysize == 0) { 6098 /* 6099 * Transform takes arbitrary key size but algorithm 6100 * key size is restricted. Enforce this here. 6101 */ 6102 switch (alg) { 6103 case SADB_X_AALG_MD5: *min = *max = 16; break; 6104 case SADB_X_AALG_SHA: *min = *max = 20; break; 6105 case SADB_X_AALG_NULL: *min = 1; *max = 256; break; 6106 case SADB_X_AALG_SHA2_256: *min = *max = 32; break; 6107 case SADB_X_AALG_SHA2_384: *min = *max = 48; break; 6108 case SADB_X_AALG_SHA2_512: *min = *max = 64; break; 6109 default: 6110 DPRINTF(("%s: unknown AH algorithm %u\n", 6111 __func__, alg)); 6112 break; 6113 } 6114 } 6115 } 6116 6117 /* 6118 * XXX reorder combinations by preference 6119 */ 6120 static struct mbuf * 6121 key_getcomb_ah() 6122 { 6123 struct sadb_comb *comb; 6124 struct auth_hash *algo; 6125 struct mbuf *m; 6126 u_int16_t minkeysize, maxkeysize; 6127 int i; 6128 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6129 6130 m = NULL; 6131 for (i = 1; i <= SADB_AALG_MAX; i++) { 6132 #if 1 6133 /* we prefer HMAC algorithms, not old algorithms */ 6134 if (i != SADB_AALG_SHA1HMAC && 6135 i != SADB_AALG_MD5HMAC && 6136 i != SADB_X_AALG_SHA2_256 && 6137 i != SADB_X_AALG_SHA2_384 && 6138 i != SADB_X_AALG_SHA2_512) 6139 continue; 6140 #endif 6141 algo = ah_algorithm_lookup(i); 6142 if (!algo) 6143 continue; 6144 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6145 /* discard algorithms with key size smaller than system min */ 6146 if (_BITS(minkeysize) < V_ipsec_ah_keymin) 6147 continue; 6148 6149 if (!m) { 6150 IPSEC_ASSERT(l <= MLEN, 6151 ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6152 MGET(m, M_DONTWAIT, MT_DATA); 6153 if (m) { 6154 M_ALIGN(m, l); 6155 m->m_len = l; 6156 m->m_next = NULL; 6157 } 6158 } else 6159 M_PREPEND(m, l, M_DONTWAIT); 6160 if (!m) 6161 return NULL; 6162 6163 comb = mtod(m, struct sadb_comb *); 6164 bzero(comb, sizeof(*comb)); 6165 key_getcomb_setlifetime(comb); 6166 comb->sadb_comb_auth = i; 6167 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6168 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6169 } 6170 6171 return m; 6172 } 6173 6174 /* 6175 * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 6176 * XXX reorder combinations by preference 6177 */ 6178 static struct mbuf * 6179 key_getcomb_ipcomp() 6180 { 6181 struct sadb_comb *comb; 6182 struct comp_algo *algo; 6183 struct mbuf *m; 6184 int i; 6185 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6186 6187 m = NULL; 6188 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6189 algo = ipcomp_algorithm_lookup(i); 6190 if (!algo) 6191 continue; 6192 6193 if (!m) { 6194 IPSEC_ASSERT(l <= MLEN, 6195 ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6196 MGET(m, M_DONTWAIT, MT_DATA); 6197 if (m) { 6198 M_ALIGN(m, l); 6199 m->m_len = l; 6200 m->m_next = NULL; 6201 } 6202 } else 6203 M_PREPEND(m, l, M_DONTWAIT); 6204 if (!m) 6205 return NULL; 6206 6207 comb = mtod(m, struct sadb_comb *); 6208 bzero(comb, sizeof(*comb)); 6209 key_getcomb_setlifetime(comb); 6210 comb->sadb_comb_encrypt = i; 6211 /* what should we set into sadb_comb_*_{min,max}bits? */ 6212 } 6213 6214 return m; 6215 } 6216 6217 /* 6218 * XXX no way to pass mode (transport/tunnel) to userland 6219 * XXX replay checking? 6220 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6221 */ 6222 static struct mbuf * 6223 key_getprop(saidx) 6224 const struct secasindex *saidx; 6225 { 6226 struct sadb_prop *prop; 6227 struct mbuf *m, *n; 6228 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6229 int totlen; 6230 6231 switch (saidx->proto) { 6232 case IPPROTO_ESP: 6233 m = key_getcomb_esp(); 6234 break; 6235 case IPPROTO_AH: 6236 m = key_getcomb_ah(); 6237 break; 6238 case IPPROTO_IPCOMP: 6239 m = key_getcomb_ipcomp(); 6240 break; 6241 default: 6242 return NULL; 6243 } 6244 6245 if (!m) 6246 return NULL; 6247 M_PREPEND(m, l, M_DONTWAIT); 6248 if (!m) 6249 return NULL; 6250 6251 totlen = 0; 6252 for (n = m; n; n = n->m_next) 6253 totlen += n->m_len; 6254 6255 prop = mtod(m, struct sadb_prop *); 6256 bzero(prop, sizeof(*prop)); 6257 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6258 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6259 prop->sadb_prop_replay = 32; /* XXX */ 6260 6261 return m; 6262 } 6263 6264 /* 6265 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6266 * send 6267 * <base, SA, address(SD), (address(P)), x_policy, 6268 * (identity(SD),) (sensitivity,) proposal> 6269 * to KMD, and expect to receive 6270 * <base> with SADB_ACQUIRE if error occured, 6271 * or 6272 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6273 * from KMD by PF_KEY. 6274 * 6275 * XXX x_policy is outside of RFC2367 (KAME extension). 6276 * XXX sensitivity is not supported. 6277 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6278 * see comment for key_getcomb_ipcomp(). 6279 * 6280 * OUT: 6281 * 0 : succeed 6282 * others: error number 6283 */ 6284 static int 6285 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6286 { 6287 struct mbuf *result = NULL, *m; 6288 struct secacq *newacq; 6289 u_int8_t satype; 6290 int error = -1; 6291 u_int32_t seq; 6292 6293 IPSEC_ASSERT(saidx != NULL, ("null saidx")); 6294 satype = key_proto2satype(saidx->proto); 6295 IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto)); 6296 6297 /* 6298 * We never do anything about acquirng SA. There is anather 6299 * solution that kernel blocks to send SADB_ACQUIRE message until 6300 * getting something message from IKEd. In later case, to be 6301 * managed with ACQUIRING list. 6302 */ 6303 /* Get an entry to check whether sending message or not. */ 6304 if ((newacq = key_getacq(saidx)) != NULL) { 6305 if (V_key_blockacq_count < newacq->count) { 6306 /* reset counter and do send message. */ 6307 newacq->count = 0; 6308 } else { 6309 /* increment counter and do nothing. */ 6310 newacq->count++; 6311 return 0; 6312 } 6313 } else { 6314 /* make new entry for blocking to send SADB_ACQUIRE. */ 6315 if ((newacq = key_newacq(saidx)) == NULL) 6316 return ENOBUFS; 6317 } 6318 6319 6320 seq = newacq->seq; 6321 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6322 if (!m) { 6323 error = ENOBUFS; 6324 goto fail; 6325 } 6326 result = m; 6327 6328 /* 6329 * No SADB_X_EXT_NAT_T_* here: we do not know 6330 * anything related to NAT-T at this time. 6331 */ 6332 6333 /* set sadb_address for saidx's. */ 6334 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6335 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6336 if (!m) { 6337 error = ENOBUFS; 6338 goto fail; 6339 } 6340 m_cat(result, m); 6341 6342 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6343 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6344 if (!m) { 6345 error = ENOBUFS; 6346 goto fail; 6347 } 6348 m_cat(result, m); 6349 6350 /* XXX proxy address (optional) */ 6351 6352 /* set sadb_x_policy */ 6353 if (sp) { 6354 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6355 if (!m) { 6356 error = ENOBUFS; 6357 goto fail; 6358 } 6359 m_cat(result, m); 6360 } 6361 6362 /* XXX identity (optional) */ 6363 #if 0 6364 if (idexttype && fqdn) { 6365 /* create identity extension (FQDN) */ 6366 struct sadb_ident *id; 6367 int fqdnlen; 6368 6369 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6370 id = (struct sadb_ident *)p; 6371 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6372 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6373 id->sadb_ident_exttype = idexttype; 6374 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6375 bcopy(fqdn, id + 1, fqdnlen); 6376 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6377 } 6378 6379 if (idexttype) { 6380 /* create identity extension (USERFQDN) */ 6381 struct sadb_ident *id; 6382 int userfqdnlen; 6383 6384 if (userfqdn) { 6385 /* +1 for terminating-NUL */ 6386 userfqdnlen = strlen(userfqdn) + 1; 6387 } else 6388 userfqdnlen = 0; 6389 id = (struct sadb_ident *)p; 6390 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6391 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6392 id->sadb_ident_exttype = idexttype; 6393 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6394 /* XXX is it correct? */ 6395 if (curproc && curproc->p_cred) 6396 id->sadb_ident_id = curproc->p_cred->p_ruid; 6397 if (userfqdn && userfqdnlen) 6398 bcopy(userfqdn, id + 1, userfqdnlen); 6399 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6400 } 6401 #endif 6402 6403 /* XXX sensitivity (optional) */ 6404 6405 /* create proposal/combination extension */ 6406 m = key_getprop(saidx); 6407 #if 0 6408 /* 6409 * spec conformant: always attach proposal/combination extension, 6410 * the problem is that we have no way to attach it for ipcomp, 6411 * due to the way sadb_comb is declared in RFC2367. 6412 */ 6413 if (!m) { 6414 error = ENOBUFS; 6415 goto fail; 6416 } 6417 m_cat(result, m); 6418 #else 6419 /* 6420 * outside of spec; make proposal/combination extension optional. 6421 */ 6422 if (m) 6423 m_cat(result, m); 6424 #endif 6425 6426 if ((result->m_flags & M_PKTHDR) == 0) { 6427 error = EINVAL; 6428 goto fail; 6429 } 6430 6431 if (result->m_len < sizeof(struct sadb_msg)) { 6432 result = m_pullup(result, sizeof(struct sadb_msg)); 6433 if (result == NULL) { 6434 error = ENOBUFS; 6435 goto fail; 6436 } 6437 } 6438 6439 result->m_pkthdr.len = 0; 6440 for (m = result; m; m = m->m_next) 6441 result->m_pkthdr.len += m->m_len; 6442 6443 mtod(result, struct sadb_msg *)->sadb_msg_len = 6444 PFKEY_UNIT64(result->m_pkthdr.len); 6445 6446 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6447 6448 fail: 6449 if (result) 6450 m_freem(result); 6451 return error; 6452 } 6453 6454 static struct secacq * 6455 key_newacq(const struct secasindex *saidx) 6456 { 6457 struct secacq *newacq; 6458 6459 /* get new entry */ 6460 newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6461 if (newacq == NULL) { 6462 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6463 return NULL; 6464 } 6465 6466 /* copy secindex */ 6467 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 6468 newacq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq); 6469 newacq->created = time_second; 6470 newacq->count = 0; 6471 6472 /* add to acqtree */ 6473 ACQ_LOCK(); 6474 LIST_INSERT_HEAD(&V_acqtree, newacq, chain); 6475 ACQ_UNLOCK(); 6476 6477 return newacq; 6478 } 6479 6480 static struct secacq * 6481 key_getacq(const struct secasindex *saidx) 6482 { 6483 struct secacq *acq; 6484 6485 ACQ_LOCK(); 6486 LIST_FOREACH(acq, &V_acqtree, chain) { 6487 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6488 break; 6489 } 6490 ACQ_UNLOCK(); 6491 6492 return acq; 6493 } 6494 6495 static struct secacq * 6496 key_getacqbyseq(seq) 6497 u_int32_t seq; 6498 { 6499 struct secacq *acq; 6500 6501 ACQ_LOCK(); 6502 LIST_FOREACH(acq, &V_acqtree, chain) { 6503 if (acq->seq == seq) 6504 break; 6505 } 6506 ACQ_UNLOCK(); 6507 6508 return acq; 6509 } 6510 6511 static struct secspacq * 6512 key_newspacq(spidx) 6513 struct secpolicyindex *spidx; 6514 { 6515 struct secspacq *acq; 6516 6517 /* get new entry */ 6518 acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6519 if (acq == NULL) { 6520 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6521 return NULL; 6522 } 6523 6524 /* copy secindex */ 6525 bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 6526 acq->created = time_second; 6527 acq->count = 0; 6528 6529 /* add to spacqtree */ 6530 SPACQ_LOCK(); 6531 LIST_INSERT_HEAD(&V_spacqtree, acq, chain); 6532 SPACQ_UNLOCK(); 6533 6534 return acq; 6535 } 6536 6537 static struct secspacq * 6538 key_getspacq(spidx) 6539 struct secpolicyindex *spidx; 6540 { 6541 struct secspacq *acq; 6542 6543 SPACQ_LOCK(); 6544 LIST_FOREACH(acq, &V_spacqtree, chain) { 6545 if (key_cmpspidx_exactly(spidx, &acq->spidx)) { 6546 /* NB: return holding spacq_lock */ 6547 return acq; 6548 } 6549 } 6550 SPACQ_UNLOCK(); 6551 6552 return NULL; 6553 } 6554 6555 /* 6556 * SADB_ACQUIRE processing, 6557 * in first situation, is receiving 6558 * <base> 6559 * from the ikmpd, and clear sequence of its secasvar entry. 6560 * 6561 * In second situation, is receiving 6562 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6563 * from a user land process, and return 6564 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6565 * to the socket. 6566 * 6567 * m will always be freed. 6568 */ 6569 static int 6570 key_acquire2(so, m, mhp) 6571 struct socket *so; 6572 struct mbuf *m; 6573 const struct sadb_msghdr *mhp; 6574 { 6575 const struct sadb_address *src0, *dst0; 6576 struct secasindex saidx; 6577 struct secashead *sah; 6578 u_int16_t proto; 6579 int error; 6580 6581 IPSEC_ASSERT(so != NULL, ("null socket")); 6582 IPSEC_ASSERT(m != NULL, ("null mbuf")); 6583 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6584 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6585 6586 /* 6587 * Error message from KMd. 6588 * We assume that if error was occured in IKEd, the length of PFKEY 6589 * message is equal to the size of sadb_msg structure. 6590 * We do not raise error even if error occured in this function. 6591 */ 6592 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6593 struct secacq *acq; 6594 6595 /* check sequence number */ 6596 if (mhp->msg->sadb_msg_seq == 0) { 6597 ipseclog((LOG_DEBUG, "%s: must specify sequence " 6598 "number.\n", __func__)); 6599 m_freem(m); 6600 return 0; 6601 } 6602 6603 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6604 /* 6605 * the specified larval SA is already gone, or we got 6606 * a bogus sequence number. we can silently ignore it. 6607 */ 6608 m_freem(m); 6609 return 0; 6610 } 6611 6612 /* reset acq counter in order to deletion by timehander. */ 6613 acq->created = time_second; 6614 acq->count = 0; 6615 m_freem(m); 6616 return 0; 6617 } 6618 6619 /* 6620 * This message is from user land. 6621 */ 6622 6623 /* map satype to proto */ 6624 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6625 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6626 __func__)); 6627 return key_senderror(so, m, EINVAL); 6628 } 6629 6630 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6631 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6632 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6633 /* error */ 6634 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6635 __func__)); 6636 return key_senderror(so, m, EINVAL); 6637 } 6638 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6639 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6640 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6641 /* error */ 6642 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6643 __func__)); 6644 return key_senderror(so, m, EINVAL); 6645 } 6646 6647 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6648 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6649 6650 /* XXX boundary check against sa_len */ 6651 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6652 6653 /* 6654 * Make sure the port numbers are zero. 6655 * In case of NAT-T we will update them later if needed. 6656 */ 6657 KEY_PORTTOSADDR(&saidx.src, 0); 6658 KEY_PORTTOSADDR(&saidx.dst, 0); 6659 6660 #ifndef IPSEC_NAT_T 6661 /* 6662 * Handle NAT-T info if present. 6663 */ 6664 6665 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 6666 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 6667 struct sadb_x_nat_t_port *sport, *dport; 6668 6669 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 6670 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 6671 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 6672 __func__)); 6673 return key_senderror(so, m, EINVAL); 6674 } 6675 6676 sport = (struct sadb_x_nat_t_port *) 6677 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 6678 dport = (struct sadb_x_nat_t_port *) 6679 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 6680 6681 if (sport) 6682 KEY_PORTTOSADDR(&saidx.src, 6683 sport->sadb_x_nat_t_port_port); 6684 if (dport) 6685 KEY_PORTTOSADDR(&saidx.dst, 6686 dport->sadb_x_nat_t_port_port); 6687 } 6688 #endif 6689 6690 /* get a SA index */ 6691 SAHTREE_LOCK(); 6692 LIST_FOREACH(sah, &V_sahtree, chain) { 6693 if (sah->state == SADB_SASTATE_DEAD) 6694 continue; 6695 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6696 break; 6697 } 6698 SAHTREE_UNLOCK(); 6699 if (sah != NULL) { 6700 ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__)); 6701 return key_senderror(so, m, EEXIST); 6702 } 6703 6704 error = key_acquire(&saidx, NULL); 6705 if (error != 0) { 6706 ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 6707 __func__, mhp->msg->sadb_msg_errno)); 6708 return key_senderror(so, m, error); 6709 } 6710 6711 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6712 } 6713 6714 /* 6715 * SADB_REGISTER processing. 6716 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6717 * receive 6718 * <base> 6719 * from the ikmpd, and register a socket to send PF_KEY messages, 6720 * and send 6721 * <base, supported> 6722 * to KMD by PF_KEY. 6723 * If socket is detached, must free from regnode. 6724 * 6725 * m will always be freed. 6726 */ 6727 static int 6728 key_register(so, m, mhp) 6729 struct socket *so; 6730 struct mbuf *m; 6731 const struct sadb_msghdr *mhp; 6732 { 6733 struct secreg *reg, *newreg = 0; 6734 6735 IPSEC_ASSERT(so != NULL, ("null socket")); 6736 IPSEC_ASSERT(m != NULL, ("null mbuf")); 6737 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6738 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6739 6740 /* check for invalid register message */ 6741 if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0])) 6742 return key_senderror(so, m, EINVAL); 6743 6744 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6745 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6746 goto setmsg; 6747 6748 /* check whether existing or not */ 6749 REGTREE_LOCK(); 6750 LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) { 6751 if (reg->so == so) { 6752 REGTREE_UNLOCK(); 6753 ipseclog((LOG_DEBUG, "%s: socket exists already.\n", 6754 __func__)); 6755 return key_senderror(so, m, EEXIST); 6756 } 6757 } 6758 6759 /* create regnode */ 6760 newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO); 6761 if (newreg == NULL) { 6762 REGTREE_UNLOCK(); 6763 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6764 return key_senderror(so, m, ENOBUFS); 6765 } 6766 6767 newreg->so = so; 6768 ((struct keycb *)sotorawcb(so))->kp_registered++; 6769 6770 /* add regnode to regtree. */ 6771 LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain); 6772 REGTREE_UNLOCK(); 6773 6774 setmsg: 6775 { 6776 struct mbuf *n; 6777 struct sadb_msg *newmsg; 6778 struct sadb_supported *sup; 6779 u_int len, alen, elen; 6780 int off; 6781 int i; 6782 struct sadb_alg *alg; 6783 6784 /* create new sadb_msg to reply. */ 6785 alen = 0; 6786 for (i = 1; i <= SADB_AALG_MAX; i++) { 6787 if (ah_algorithm_lookup(i)) 6788 alen += sizeof(struct sadb_alg); 6789 } 6790 if (alen) 6791 alen += sizeof(struct sadb_supported); 6792 elen = 0; 6793 for (i = 1; i <= SADB_EALG_MAX; i++) { 6794 if (esp_algorithm_lookup(i)) 6795 elen += sizeof(struct sadb_alg); 6796 } 6797 if (elen) 6798 elen += sizeof(struct sadb_supported); 6799 6800 len = sizeof(struct sadb_msg) + alen + elen; 6801 6802 if (len > MCLBYTES) 6803 return key_senderror(so, m, ENOBUFS); 6804 6805 MGETHDR(n, M_DONTWAIT, MT_DATA); 6806 if (len > MHLEN) { 6807 MCLGET(n, M_DONTWAIT); 6808 if ((n->m_flags & M_EXT) == 0) { 6809 m_freem(n); 6810 n = NULL; 6811 } 6812 } 6813 if (!n) 6814 return key_senderror(so, m, ENOBUFS); 6815 6816 n->m_pkthdr.len = n->m_len = len; 6817 n->m_next = NULL; 6818 off = 0; 6819 6820 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 6821 newmsg = mtod(n, struct sadb_msg *); 6822 newmsg->sadb_msg_errno = 0; 6823 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6824 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6825 6826 /* for authentication algorithm */ 6827 if (alen) { 6828 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6829 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6830 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6831 off += PFKEY_ALIGN8(sizeof(*sup)); 6832 6833 for (i = 1; i <= SADB_AALG_MAX; i++) { 6834 struct auth_hash *aalgo; 6835 u_int16_t minkeysize, maxkeysize; 6836 6837 aalgo = ah_algorithm_lookup(i); 6838 if (!aalgo) 6839 continue; 6840 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6841 alg->sadb_alg_id = i; 6842 alg->sadb_alg_ivlen = 0; 6843 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6844 alg->sadb_alg_minbits = _BITS(minkeysize); 6845 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6846 off += PFKEY_ALIGN8(sizeof(*alg)); 6847 } 6848 } 6849 6850 /* for encryption algorithm */ 6851 if (elen) { 6852 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6853 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6854 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6855 off += PFKEY_ALIGN8(sizeof(*sup)); 6856 6857 for (i = 1; i <= SADB_EALG_MAX; i++) { 6858 struct enc_xform *ealgo; 6859 6860 ealgo = esp_algorithm_lookup(i); 6861 if (!ealgo) 6862 continue; 6863 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6864 alg->sadb_alg_id = i; 6865 alg->sadb_alg_ivlen = ealgo->blocksize; 6866 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6867 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6868 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6869 } 6870 } 6871 6872 IPSEC_ASSERT(off == len, 6873 ("length assumption failed (off %u len %u)", off, len)); 6874 6875 m_freem(m); 6876 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6877 } 6878 } 6879 6880 /* 6881 * free secreg entry registered. 6882 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6883 */ 6884 void 6885 key_freereg(struct socket *so) 6886 { 6887 struct secreg *reg; 6888 int i; 6889 6890 IPSEC_ASSERT(so != NULL, ("NULL so")); 6891 6892 /* 6893 * check whether existing or not. 6894 * check all type of SA, because there is a potential that 6895 * one socket is registered to multiple type of SA. 6896 */ 6897 REGTREE_LOCK(); 6898 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6899 LIST_FOREACH(reg, &V_regtree[i], chain) { 6900 if (reg->so == so && __LIST_CHAINED(reg)) { 6901 LIST_REMOVE(reg, chain); 6902 free(reg, M_IPSEC_SAR); 6903 break; 6904 } 6905 } 6906 } 6907 REGTREE_UNLOCK(); 6908 } 6909 6910 /* 6911 * SADB_EXPIRE processing 6912 * send 6913 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6914 * to KMD by PF_KEY. 6915 * NOTE: We send only soft lifetime extension. 6916 * 6917 * OUT: 0 : succeed 6918 * others : error number 6919 */ 6920 static int 6921 key_expire(struct secasvar *sav) 6922 { 6923 int s; 6924 int satype; 6925 struct mbuf *result = NULL, *m; 6926 int len; 6927 int error = -1; 6928 struct sadb_lifetime *lt; 6929 6930 /* XXX: Why do we lock ? */ 6931 s = splnet(); /*called from softclock()*/ 6932 6933 IPSEC_ASSERT (sav != NULL, ("null sav")); 6934 IPSEC_ASSERT (sav->sah != NULL, ("null sa header")); 6935 6936 /* set msg header */ 6937 satype = key_proto2satype(sav->sah->saidx.proto); 6938 IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype)); 6939 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6940 if (!m) { 6941 error = ENOBUFS; 6942 goto fail; 6943 } 6944 result = m; 6945 6946 /* create SA extension */ 6947 m = key_setsadbsa(sav); 6948 if (!m) { 6949 error = ENOBUFS; 6950 goto fail; 6951 } 6952 m_cat(result, m); 6953 6954 /* create SA extension */ 6955 m = key_setsadbxsa2(sav->sah->saidx.mode, 6956 sav->replay ? sav->replay->count : 0, 6957 sav->sah->saidx.reqid); 6958 if (!m) { 6959 error = ENOBUFS; 6960 goto fail; 6961 } 6962 m_cat(result, m); 6963 6964 /* create lifetime extension (current and soft) */ 6965 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6966 m = key_alloc_mbuf(len); 6967 if (!m || m->m_next) { /*XXX*/ 6968 if (m) 6969 m_freem(m); 6970 error = ENOBUFS; 6971 goto fail; 6972 } 6973 bzero(mtod(m, caddr_t), len); 6974 lt = mtod(m, struct sadb_lifetime *); 6975 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6976 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6977 lt->sadb_lifetime_allocations = sav->lft_c->allocations; 6978 lt->sadb_lifetime_bytes = sav->lft_c->bytes; 6979 lt->sadb_lifetime_addtime = sav->lft_c->addtime; 6980 lt->sadb_lifetime_usetime = sav->lft_c->usetime; 6981 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 6982 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6983 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 6984 lt->sadb_lifetime_allocations = sav->lft_s->allocations; 6985 lt->sadb_lifetime_bytes = sav->lft_s->bytes; 6986 lt->sadb_lifetime_addtime = sav->lft_s->addtime; 6987 lt->sadb_lifetime_usetime = sav->lft_s->usetime; 6988 m_cat(result, m); 6989 6990 /* set sadb_address for source */ 6991 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6992 &sav->sah->saidx.src.sa, 6993 FULLMASK, IPSEC_ULPROTO_ANY); 6994 if (!m) { 6995 error = ENOBUFS; 6996 goto fail; 6997 } 6998 m_cat(result, m); 6999 7000 /* set sadb_address for destination */ 7001 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 7002 &sav->sah->saidx.dst.sa, 7003 FULLMASK, IPSEC_ULPROTO_ANY); 7004 if (!m) { 7005 error = ENOBUFS; 7006 goto fail; 7007 } 7008 m_cat(result, m); 7009 7010 /* 7011 * XXX-BZ Handle NAT-T extensions here. 7012 */ 7013 7014 if ((result->m_flags & M_PKTHDR) == 0) { 7015 error = EINVAL; 7016 goto fail; 7017 } 7018 7019 if (result->m_len < sizeof(struct sadb_msg)) { 7020 result = m_pullup(result, sizeof(struct sadb_msg)); 7021 if (result == NULL) { 7022 error = ENOBUFS; 7023 goto fail; 7024 } 7025 } 7026 7027 result->m_pkthdr.len = 0; 7028 for (m = result; m; m = m->m_next) 7029 result->m_pkthdr.len += m->m_len; 7030 7031 mtod(result, struct sadb_msg *)->sadb_msg_len = 7032 PFKEY_UNIT64(result->m_pkthdr.len); 7033 7034 splx(s); 7035 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 7036 7037 fail: 7038 if (result) 7039 m_freem(result); 7040 splx(s); 7041 return error; 7042 } 7043 7044 /* 7045 * SADB_FLUSH processing 7046 * receive 7047 * <base> 7048 * from the ikmpd, and free all entries in secastree. 7049 * and send, 7050 * <base> 7051 * to the ikmpd. 7052 * NOTE: to do is only marking SADB_SASTATE_DEAD. 7053 * 7054 * m will always be freed. 7055 */ 7056 static int 7057 key_flush(so, m, mhp) 7058 struct socket *so; 7059 struct mbuf *m; 7060 const struct sadb_msghdr *mhp; 7061 { 7062 struct sadb_msg *newmsg; 7063 struct secashead *sah, *nextsah; 7064 struct secasvar *sav, *nextsav; 7065 u_int16_t proto; 7066 u_int8_t state; 7067 u_int stateidx; 7068 7069 IPSEC_ASSERT(so != NULL, ("null socket")); 7070 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7071 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7072 7073 /* map satype to proto */ 7074 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7075 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7076 __func__)); 7077 return key_senderror(so, m, EINVAL); 7078 } 7079 7080 /* no SATYPE specified, i.e. flushing all SA. */ 7081 SAHTREE_LOCK(); 7082 for (sah = LIST_FIRST(&V_sahtree); 7083 sah != NULL; 7084 sah = nextsah) { 7085 nextsah = LIST_NEXT(sah, chain); 7086 7087 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7088 && proto != sah->saidx.proto) 7089 continue; 7090 7091 for (stateidx = 0; 7092 stateidx < _ARRAYLEN(saorder_state_alive); 7093 stateidx++) { 7094 state = saorder_state_any[stateidx]; 7095 for (sav = LIST_FIRST(&sah->savtree[state]); 7096 sav != NULL; 7097 sav = nextsav) { 7098 7099 nextsav = LIST_NEXT(sav, chain); 7100 7101 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7102 KEY_FREESAV(&sav); 7103 } 7104 } 7105 7106 sah->state = SADB_SASTATE_DEAD; 7107 } 7108 SAHTREE_UNLOCK(); 7109 7110 if (m->m_len < sizeof(struct sadb_msg) || 7111 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7112 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 7113 return key_senderror(so, m, ENOBUFS); 7114 } 7115 7116 if (m->m_next) 7117 m_freem(m->m_next); 7118 m->m_next = NULL; 7119 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7120 newmsg = mtod(m, struct sadb_msg *); 7121 newmsg->sadb_msg_errno = 0; 7122 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7123 7124 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7125 } 7126 7127 /* 7128 * SADB_DUMP processing 7129 * dump all entries including status of DEAD in SAD. 7130 * receive 7131 * <base> 7132 * from the ikmpd, and dump all secasvar leaves 7133 * and send, 7134 * <base> ..... 7135 * to the ikmpd. 7136 * 7137 * m will always be freed. 7138 */ 7139 static int 7140 key_dump(so, m, mhp) 7141 struct socket *so; 7142 struct mbuf *m; 7143 const struct sadb_msghdr *mhp; 7144 { 7145 struct secashead *sah; 7146 struct secasvar *sav; 7147 u_int16_t proto; 7148 u_int stateidx; 7149 u_int8_t satype; 7150 u_int8_t state; 7151 int cnt; 7152 struct sadb_msg *newmsg; 7153 struct mbuf *n; 7154 7155 IPSEC_ASSERT(so != NULL, ("null socket")); 7156 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7157 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7158 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7159 7160 /* map satype to proto */ 7161 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7162 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7163 __func__)); 7164 return key_senderror(so, m, EINVAL); 7165 } 7166 7167 /* count sav entries to be sent to the userland. */ 7168 cnt = 0; 7169 SAHTREE_LOCK(); 7170 LIST_FOREACH(sah, &V_sahtree, chain) { 7171 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7172 && proto != sah->saidx.proto) 7173 continue; 7174 7175 for (stateidx = 0; 7176 stateidx < _ARRAYLEN(saorder_state_any); 7177 stateidx++) { 7178 state = saorder_state_any[stateidx]; 7179 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7180 cnt++; 7181 } 7182 } 7183 } 7184 7185 if (cnt == 0) { 7186 SAHTREE_UNLOCK(); 7187 return key_senderror(so, m, ENOENT); 7188 } 7189 7190 /* send this to the userland, one at a time. */ 7191 newmsg = NULL; 7192 LIST_FOREACH(sah, &V_sahtree, chain) { 7193 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7194 && proto != sah->saidx.proto) 7195 continue; 7196 7197 /* map proto to satype */ 7198 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7199 SAHTREE_UNLOCK(); 7200 ipseclog((LOG_DEBUG, "%s: there was invalid proto in " 7201 "SAD.\n", __func__)); 7202 return key_senderror(so, m, EINVAL); 7203 } 7204 7205 for (stateidx = 0; 7206 stateidx < _ARRAYLEN(saorder_state_any); 7207 stateidx++) { 7208 state = saorder_state_any[stateidx]; 7209 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7210 n = key_setdumpsa(sav, SADB_DUMP, satype, 7211 --cnt, mhp->msg->sadb_msg_pid); 7212 if (!n) { 7213 SAHTREE_UNLOCK(); 7214 return key_senderror(so, m, ENOBUFS); 7215 } 7216 key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 7217 } 7218 } 7219 } 7220 SAHTREE_UNLOCK(); 7221 7222 m_freem(m); 7223 return 0; 7224 } 7225 7226 /* 7227 * SADB_X_PROMISC processing 7228 * 7229 * m will always be freed. 7230 */ 7231 static int 7232 key_promisc(so, m, mhp) 7233 struct socket *so; 7234 struct mbuf *m; 7235 const struct sadb_msghdr *mhp; 7236 { 7237 int olen; 7238 7239 IPSEC_ASSERT(so != NULL, ("null socket")); 7240 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7241 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7242 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7243 7244 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7245 7246 if (olen < sizeof(struct sadb_msg)) { 7247 #if 1 7248 return key_senderror(so, m, EINVAL); 7249 #else 7250 m_freem(m); 7251 return 0; 7252 #endif 7253 } else if (olen == sizeof(struct sadb_msg)) { 7254 /* enable/disable promisc mode */ 7255 struct keycb *kp; 7256 7257 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7258 return key_senderror(so, m, EINVAL); 7259 mhp->msg->sadb_msg_errno = 0; 7260 switch (mhp->msg->sadb_msg_satype) { 7261 case 0: 7262 case 1: 7263 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7264 break; 7265 default: 7266 return key_senderror(so, m, EINVAL); 7267 } 7268 7269 /* send the original message back to everyone */ 7270 mhp->msg->sadb_msg_errno = 0; 7271 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7272 } else { 7273 /* send packet as is */ 7274 7275 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7276 7277 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7278 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7279 } 7280 } 7281 7282 static int (*key_typesw[]) __P((struct socket *, struct mbuf *, 7283 const struct sadb_msghdr *)) = { 7284 NULL, /* SADB_RESERVED */ 7285 key_getspi, /* SADB_GETSPI */ 7286 key_update, /* SADB_UPDATE */ 7287 key_add, /* SADB_ADD */ 7288 key_delete, /* SADB_DELETE */ 7289 key_get, /* SADB_GET */ 7290 key_acquire2, /* SADB_ACQUIRE */ 7291 key_register, /* SADB_REGISTER */ 7292 NULL, /* SADB_EXPIRE */ 7293 key_flush, /* SADB_FLUSH */ 7294 key_dump, /* SADB_DUMP */ 7295 key_promisc, /* SADB_X_PROMISC */ 7296 NULL, /* SADB_X_PCHANGE */ 7297 key_spdadd, /* SADB_X_SPDUPDATE */ 7298 key_spdadd, /* SADB_X_SPDADD */ 7299 key_spddelete, /* SADB_X_SPDDELETE */ 7300 key_spdget, /* SADB_X_SPDGET */ 7301 NULL, /* SADB_X_SPDACQUIRE */ 7302 key_spddump, /* SADB_X_SPDDUMP */ 7303 key_spdflush, /* SADB_X_SPDFLUSH */ 7304 key_spdadd, /* SADB_X_SPDSETIDX */ 7305 NULL, /* SADB_X_SPDEXPIRE */ 7306 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7307 }; 7308 7309 /* 7310 * parse sadb_msg buffer to process PFKEYv2, 7311 * and create a data to response if needed. 7312 * I think to be dealed with mbuf directly. 7313 * IN: 7314 * msgp : pointer to pointer to a received buffer pulluped. 7315 * This is rewrited to response. 7316 * so : pointer to socket. 7317 * OUT: 7318 * length for buffer to send to user process. 7319 */ 7320 int 7321 key_parse(m, so) 7322 struct mbuf *m; 7323 struct socket *so; 7324 { 7325 struct sadb_msg *msg; 7326 struct sadb_msghdr mh; 7327 u_int orglen; 7328 int error; 7329 int target; 7330 7331 IPSEC_ASSERT(so != NULL, ("null socket")); 7332 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7333 7334 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7335 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7336 ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__)); 7337 kdebug_sadb(msg)); 7338 #endif 7339 7340 if (m->m_len < sizeof(struct sadb_msg)) { 7341 m = m_pullup(m, sizeof(struct sadb_msg)); 7342 if (!m) 7343 return ENOBUFS; 7344 } 7345 msg = mtod(m, struct sadb_msg *); 7346 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7347 target = KEY_SENDUP_ONE; 7348 7349 if ((m->m_flags & M_PKTHDR) == 0 || 7350 m->m_pkthdr.len != m->m_pkthdr.len) { 7351 ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__)); 7352 V_pfkeystat.out_invlen++; 7353 error = EINVAL; 7354 goto senderror; 7355 } 7356 7357 if (msg->sadb_msg_version != PF_KEY_V2) { 7358 ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n", 7359 __func__, msg->sadb_msg_version)); 7360 V_pfkeystat.out_invver++; 7361 error = EINVAL; 7362 goto senderror; 7363 } 7364 7365 if (msg->sadb_msg_type > SADB_MAX) { 7366 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7367 __func__, msg->sadb_msg_type)); 7368 V_pfkeystat.out_invmsgtype++; 7369 error = EINVAL; 7370 goto senderror; 7371 } 7372 7373 /* for old-fashioned code - should be nuked */ 7374 if (m->m_pkthdr.len > MCLBYTES) { 7375 m_freem(m); 7376 return ENOBUFS; 7377 } 7378 if (m->m_next) { 7379 struct mbuf *n; 7380 7381 MGETHDR(n, M_DONTWAIT, MT_DATA); 7382 if (n && m->m_pkthdr.len > MHLEN) { 7383 MCLGET(n, M_DONTWAIT); 7384 if ((n->m_flags & M_EXT) == 0) { 7385 m_free(n); 7386 n = NULL; 7387 } 7388 } 7389 if (!n) { 7390 m_freem(m); 7391 return ENOBUFS; 7392 } 7393 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); 7394 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7395 n->m_next = NULL; 7396 m_freem(m); 7397 m = n; 7398 } 7399 7400 /* align the mbuf chain so that extensions are in contiguous region. */ 7401 error = key_align(m, &mh); 7402 if (error) 7403 return error; 7404 7405 msg = mh.msg; 7406 7407 /* check SA type */ 7408 switch (msg->sadb_msg_satype) { 7409 case SADB_SATYPE_UNSPEC: 7410 switch (msg->sadb_msg_type) { 7411 case SADB_GETSPI: 7412 case SADB_UPDATE: 7413 case SADB_ADD: 7414 case SADB_DELETE: 7415 case SADB_GET: 7416 case SADB_ACQUIRE: 7417 case SADB_EXPIRE: 7418 ipseclog((LOG_DEBUG, "%s: must specify satype " 7419 "when msg type=%u.\n", __func__, 7420 msg->sadb_msg_type)); 7421 V_pfkeystat.out_invsatype++; 7422 error = EINVAL; 7423 goto senderror; 7424 } 7425 break; 7426 case SADB_SATYPE_AH: 7427 case SADB_SATYPE_ESP: 7428 case SADB_X_SATYPE_IPCOMP: 7429 case SADB_X_SATYPE_TCPSIGNATURE: 7430 switch (msg->sadb_msg_type) { 7431 case SADB_X_SPDADD: 7432 case SADB_X_SPDDELETE: 7433 case SADB_X_SPDGET: 7434 case SADB_X_SPDDUMP: 7435 case SADB_X_SPDFLUSH: 7436 case SADB_X_SPDSETIDX: 7437 case SADB_X_SPDUPDATE: 7438 case SADB_X_SPDDELETE2: 7439 ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", 7440 __func__, msg->sadb_msg_type)); 7441 V_pfkeystat.out_invsatype++; 7442 error = EINVAL; 7443 goto senderror; 7444 } 7445 break; 7446 case SADB_SATYPE_RSVP: 7447 case SADB_SATYPE_OSPFV2: 7448 case SADB_SATYPE_RIPV2: 7449 case SADB_SATYPE_MIP: 7450 ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n", 7451 __func__, msg->sadb_msg_satype)); 7452 V_pfkeystat.out_invsatype++; 7453 error = EOPNOTSUPP; 7454 goto senderror; 7455 case 1: /* XXX: What does it do? */ 7456 if (msg->sadb_msg_type == SADB_X_PROMISC) 7457 break; 7458 /*FALLTHROUGH*/ 7459 default: 7460 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7461 __func__, msg->sadb_msg_satype)); 7462 V_pfkeystat.out_invsatype++; 7463 error = EINVAL; 7464 goto senderror; 7465 } 7466 7467 /* check field of upper layer protocol and address family */ 7468 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7469 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7470 struct sadb_address *src0, *dst0; 7471 u_int plen; 7472 7473 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7474 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7475 7476 /* check upper layer protocol */ 7477 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7478 ipseclog((LOG_DEBUG, "%s: upper layer protocol " 7479 "mismatched.\n", __func__)); 7480 V_pfkeystat.out_invaddr++; 7481 error = EINVAL; 7482 goto senderror; 7483 } 7484 7485 /* check family */ 7486 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7487 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7488 ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 7489 __func__)); 7490 V_pfkeystat.out_invaddr++; 7491 error = EINVAL; 7492 goto senderror; 7493 } 7494 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7495 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7496 ipseclog((LOG_DEBUG, "%s: address struct size " 7497 "mismatched.\n", __func__)); 7498 V_pfkeystat.out_invaddr++; 7499 error = EINVAL; 7500 goto senderror; 7501 } 7502 7503 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7504 case AF_INET: 7505 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7506 sizeof(struct sockaddr_in)) { 7507 V_pfkeystat.out_invaddr++; 7508 error = EINVAL; 7509 goto senderror; 7510 } 7511 break; 7512 case AF_INET6: 7513 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7514 sizeof(struct sockaddr_in6)) { 7515 V_pfkeystat.out_invaddr++; 7516 error = EINVAL; 7517 goto senderror; 7518 } 7519 break; 7520 default: 7521 ipseclog((LOG_DEBUG, "%s: unsupported address family\n", 7522 __func__)); 7523 V_pfkeystat.out_invaddr++; 7524 error = EAFNOSUPPORT; 7525 goto senderror; 7526 } 7527 7528 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7529 case AF_INET: 7530 plen = sizeof(struct in_addr) << 3; 7531 break; 7532 case AF_INET6: 7533 plen = sizeof(struct in6_addr) << 3; 7534 break; 7535 default: 7536 plen = 0; /*fool gcc*/ 7537 break; 7538 } 7539 7540 /* check max prefix length */ 7541 if (src0->sadb_address_prefixlen > plen || 7542 dst0->sadb_address_prefixlen > plen) { 7543 ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n", 7544 __func__)); 7545 V_pfkeystat.out_invaddr++; 7546 error = EINVAL; 7547 goto senderror; 7548 } 7549 7550 /* 7551 * prefixlen == 0 is valid because there can be a case when 7552 * all addresses are matched. 7553 */ 7554 } 7555 7556 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7557 key_typesw[msg->sadb_msg_type] == NULL) { 7558 V_pfkeystat.out_invmsgtype++; 7559 error = EINVAL; 7560 goto senderror; 7561 } 7562 7563 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7564 7565 senderror: 7566 msg->sadb_msg_errno = error; 7567 return key_sendup_mbuf(so, m, target); 7568 } 7569 7570 static int 7571 key_senderror(so, m, code) 7572 struct socket *so; 7573 struct mbuf *m; 7574 int code; 7575 { 7576 struct sadb_msg *msg; 7577 7578 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7579 ("mbuf too small, len %u", m->m_len)); 7580 7581 msg = mtod(m, struct sadb_msg *); 7582 msg->sadb_msg_errno = code; 7583 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7584 } 7585 7586 /* 7587 * set the pointer to each header into message buffer. 7588 * m will be freed on error. 7589 * XXX larger-than-MCLBYTES extension? 7590 */ 7591 static int 7592 key_align(m, mhp) 7593 struct mbuf *m; 7594 struct sadb_msghdr *mhp; 7595 { 7596 struct mbuf *n; 7597 struct sadb_ext *ext; 7598 size_t off, end; 7599 int extlen; 7600 int toff; 7601 7602 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7603 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7604 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7605 ("mbuf too small, len %u", m->m_len)); 7606 7607 /* initialize */ 7608 bzero(mhp, sizeof(*mhp)); 7609 7610 mhp->msg = mtod(m, struct sadb_msg *); 7611 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7612 7613 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7614 extlen = end; /*just in case extlen is not updated*/ 7615 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7616 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7617 if (!n) { 7618 /* m is already freed */ 7619 return ENOBUFS; 7620 } 7621 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7622 7623 /* set pointer */ 7624 switch (ext->sadb_ext_type) { 7625 case SADB_EXT_SA: 7626 case SADB_EXT_ADDRESS_SRC: 7627 case SADB_EXT_ADDRESS_DST: 7628 case SADB_EXT_ADDRESS_PROXY: 7629 case SADB_EXT_LIFETIME_CURRENT: 7630 case SADB_EXT_LIFETIME_HARD: 7631 case SADB_EXT_LIFETIME_SOFT: 7632 case SADB_EXT_KEY_AUTH: 7633 case SADB_EXT_KEY_ENCRYPT: 7634 case SADB_EXT_IDENTITY_SRC: 7635 case SADB_EXT_IDENTITY_DST: 7636 case SADB_EXT_SENSITIVITY: 7637 case SADB_EXT_PROPOSAL: 7638 case SADB_EXT_SUPPORTED_AUTH: 7639 case SADB_EXT_SUPPORTED_ENCRYPT: 7640 case SADB_EXT_SPIRANGE: 7641 case SADB_X_EXT_POLICY: 7642 case SADB_X_EXT_SA2: 7643 #ifdef IPSEC_NAT_T 7644 case SADB_X_EXT_NAT_T_TYPE: 7645 case SADB_X_EXT_NAT_T_SPORT: 7646 case SADB_X_EXT_NAT_T_DPORT: 7647 case SADB_X_EXT_NAT_T_OAI: 7648 case SADB_X_EXT_NAT_T_OAR: 7649 case SADB_X_EXT_NAT_T_FRAG: 7650 #endif 7651 /* duplicate check */ 7652 /* 7653 * XXX Are there duplication payloads of either 7654 * KEY_AUTH or KEY_ENCRYPT ? 7655 */ 7656 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7657 ipseclog((LOG_DEBUG, "%s: duplicate ext_type " 7658 "%u\n", __func__, ext->sadb_ext_type)); 7659 m_freem(m); 7660 V_pfkeystat.out_dupext++; 7661 return EINVAL; 7662 } 7663 break; 7664 default: 7665 ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n", 7666 __func__, ext->sadb_ext_type)); 7667 m_freem(m); 7668 V_pfkeystat.out_invexttype++; 7669 return EINVAL; 7670 } 7671 7672 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7673 7674 if (key_validate_ext(ext, extlen)) { 7675 m_freem(m); 7676 V_pfkeystat.out_invlen++; 7677 return EINVAL; 7678 } 7679 7680 n = m_pulldown(m, off, extlen, &toff); 7681 if (!n) { 7682 /* m is already freed */ 7683 return ENOBUFS; 7684 } 7685 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7686 7687 mhp->ext[ext->sadb_ext_type] = ext; 7688 mhp->extoff[ext->sadb_ext_type] = off; 7689 mhp->extlen[ext->sadb_ext_type] = extlen; 7690 } 7691 7692 if (off != end) { 7693 m_freem(m); 7694 V_pfkeystat.out_invlen++; 7695 return EINVAL; 7696 } 7697 7698 return 0; 7699 } 7700 7701 static int 7702 key_validate_ext(ext, len) 7703 const struct sadb_ext *ext; 7704 int len; 7705 { 7706 const struct sockaddr *sa; 7707 enum { NONE, ADDR } checktype = NONE; 7708 int baselen = 0; 7709 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7710 7711 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7712 return EINVAL; 7713 7714 /* if it does not match minimum/maximum length, bail */ 7715 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7716 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7717 return EINVAL; 7718 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7719 return EINVAL; 7720 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7721 return EINVAL; 7722 7723 /* more checks based on sadb_ext_type XXX need more */ 7724 switch (ext->sadb_ext_type) { 7725 case SADB_EXT_ADDRESS_SRC: 7726 case SADB_EXT_ADDRESS_DST: 7727 case SADB_EXT_ADDRESS_PROXY: 7728 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7729 checktype = ADDR; 7730 break; 7731 case SADB_EXT_IDENTITY_SRC: 7732 case SADB_EXT_IDENTITY_DST: 7733 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7734 SADB_X_IDENTTYPE_ADDR) { 7735 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7736 checktype = ADDR; 7737 } else 7738 checktype = NONE; 7739 break; 7740 default: 7741 checktype = NONE; 7742 break; 7743 } 7744 7745 switch (checktype) { 7746 case NONE: 7747 break; 7748 case ADDR: 7749 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7750 if (len < baselen + sal) 7751 return EINVAL; 7752 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7753 return EINVAL; 7754 break; 7755 } 7756 7757 return 0; 7758 } 7759 7760 void 7761 key_init(void) 7762 { 7763 int i; 7764 7765 for (i = 0; i < IPSEC_DIR_MAX; i++) 7766 LIST_INIT(&V_sptree[i]); 7767 7768 LIST_INIT(&V_sahtree); 7769 7770 for (i = 0; i <= SADB_SATYPE_MAX; i++) 7771 LIST_INIT(&V_regtree[i]); 7772 7773 LIST_INIT(&V_acqtree); 7774 LIST_INIT(&V_spacqtree); 7775 7776 /* system default */ 7777 V_ip4_def_policy.policy = IPSEC_POLICY_NONE; 7778 V_ip4_def_policy.refcnt++; /*never reclaim this*/ 7779 7780 if (!IS_DEFAULT_VNET(curvnet)) 7781 return; 7782 7783 SPTREE_LOCK_INIT(); 7784 REGTREE_LOCK_INIT(); 7785 SAHTREE_LOCK_INIT(); 7786 ACQ_LOCK_INIT(); 7787 SPACQ_LOCK_INIT(); 7788 7789 #ifndef IPSEC_DEBUG2 7790 timeout((void *)key_timehandler, (void *)0, hz); 7791 #endif /*IPSEC_DEBUG2*/ 7792 7793 /* initialize key statistics */ 7794 keystat.getspi_count = 1; 7795 7796 printf("IPsec: Initialized Security Association Processing.\n"); 7797 } 7798 7799 #ifdef VIMAGE 7800 void 7801 key_destroy(void) 7802 { 7803 struct secpolicy *sp, *nextsp; 7804 struct secacq *acq, *nextacq; 7805 struct secspacq *spacq, *nextspacq; 7806 struct secashead *sah, *nextsah; 7807 struct secreg *reg; 7808 int i; 7809 7810 SPTREE_LOCK(); 7811 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7812 for (sp = LIST_FIRST(&V_sptree[i]); 7813 sp != NULL; sp = nextsp) { 7814 nextsp = LIST_NEXT(sp, chain); 7815 if (__LIST_CHAINED(sp)) { 7816 LIST_REMOVE(sp, chain); 7817 free(sp, M_IPSEC_SP); 7818 } 7819 } 7820 } 7821 SPTREE_UNLOCK(); 7822 7823 SAHTREE_LOCK(); 7824 for (sah = LIST_FIRST(&V_sahtree); sah != NULL; sah = nextsah) { 7825 nextsah = LIST_NEXT(sah, chain); 7826 if (__LIST_CHAINED(sah)) { 7827 LIST_REMOVE(sah, chain); 7828 free(sah, M_IPSEC_SAH); 7829 } 7830 } 7831 SAHTREE_UNLOCK(); 7832 7833 REGTREE_LOCK(); 7834 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7835 LIST_FOREACH(reg, &V_regtree[i], chain) { 7836 if (__LIST_CHAINED(reg)) { 7837 LIST_REMOVE(reg, chain); 7838 free(reg, M_IPSEC_SAR); 7839 break; 7840 } 7841 } 7842 } 7843 REGTREE_UNLOCK(); 7844 7845 ACQ_LOCK(); 7846 for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 7847 nextacq = LIST_NEXT(acq, chain); 7848 if (__LIST_CHAINED(acq)) { 7849 LIST_REMOVE(acq, chain); 7850 free(acq, M_IPSEC_SAQ); 7851 } 7852 } 7853 ACQ_UNLOCK(); 7854 7855 SPACQ_LOCK(); 7856 for (spacq = LIST_FIRST(&V_spacqtree); spacq != NULL; 7857 spacq = nextspacq) { 7858 nextspacq = LIST_NEXT(spacq, chain); 7859 if (__LIST_CHAINED(spacq)) { 7860 LIST_REMOVE(spacq, chain); 7861 free(spacq, M_IPSEC_SAQ); 7862 } 7863 } 7864 SPACQ_UNLOCK(); 7865 } 7866 #endif 7867 7868 /* 7869 * XXX: maybe This function is called after INBOUND IPsec processing. 7870 * 7871 * Special check for tunnel-mode packets. 7872 * We must make some checks for consistency between inner and outer IP header. 7873 * 7874 * xxx more checks to be provided 7875 */ 7876 int 7877 key_checktunnelsanity(sav, family, src, dst) 7878 struct secasvar *sav; 7879 u_int family; 7880 caddr_t src; 7881 caddr_t dst; 7882 { 7883 IPSEC_ASSERT(sav->sah != NULL, ("null SA header")); 7884 7885 /* XXX: check inner IP header */ 7886 7887 return 1; 7888 } 7889 7890 /* record data transfer on SA, and update timestamps */ 7891 void 7892 key_sa_recordxfer(sav, m) 7893 struct secasvar *sav; 7894 struct mbuf *m; 7895 { 7896 IPSEC_ASSERT(sav != NULL, ("Null secasvar")); 7897 IPSEC_ASSERT(m != NULL, ("Null mbuf")); 7898 if (!sav->lft_c) 7899 return; 7900 7901 /* 7902 * XXX Currently, there is a difference of bytes size 7903 * between inbound and outbound processing. 7904 */ 7905 sav->lft_c->bytes += m->m_pkthdr.len; 7906 /* to check bytes lifetime is done in key_timehandler(). */ 7907 7908 /* 7909 * We use the number of packets as the unit of 7910 * allocations. We increment the variable 7911 * whenever {esp,ah}_{in,out}put is called. 7912 */ 7913 sav->lft_c->allocations++; 7914 /* XXX check for expires? */ 7915 7916 /* 7917 * NOTE: We record CURRENT usetime by using wall clock, 7918 * in seconds. HARD and SOFT lifetime are measured by the time 7919 * difference (again in seconds) from usetime. 7920 * 7921 * usetime 7922 * v expire expire 7923 * -----+-----+--------+---> t 7924 * <--------------> HARD 7925 * <-----> SOFT 7926 */ 7927 sav->lft_c->usetime = time_second; 7928 /* XXX check for expires? */ 7929 7930 return; 7931 } 7932 7933 /* dumb version */ 7934 void 7935 key_sa_routechange(dst) 7936 struct sockaddr *dst; 7937 { 7938 struct secashead *sah; 7939 struct route *ro; 7940 7941 SAHTREE_LOCK(); 7942 LIST_FOREACH(sah, &V_sahtree, chain) { 7943 ro = &sah->route_cache.sa_route; 7944 if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len 7945 && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { 7946 RTFREE(ro->ro_rt); 7947 ro->ro_rt = (struct rtentry *)NULL; 7948 } 7949 } 7950 SAHTREE_UNLOCK(); 7951 } 7952 7953 static void 7954 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7955 { 7956 IPSEC_ASSERT(sav != NULL, ("NULL sav")); 7957 SAHTREE_LOCK_ASSERT(); 7958 7959 if (sav->state != state) { 7960 if (__LIST_CHAINED(sav)) 7961 LIST_REMOVE(sav, chain); 7962 sav->state = state; 7963 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7964 } 7965 } 7966 7967 void 7968 key_sa_stir_iv(sav) 7969 struct secasvar *sav; 7970 { 7971 7972 IPSEC_ASSERT(sav->iv != NULL, ("null IV")); 7973 key_randomfill(sav->iv, sav->ivlen); 7974 } 7975 7976 /* XXX too much? */ 7977 static struct mbuf * 7978 key_alloc_mbuf(l) 7979 int l; 7980 { 7981 struct mbuf *m = NULL, *n; 7982 int len, t; 7983 7984 len = l; 7985 while (len > 0) { 7986 MGET(n, M_DONTWAIT, MT_DATA); 7987 if (n && len > MLEN) 7988 MCLGET(n, M_DONTWAIT); 7989 if (!n) { 7990 m_freem(m); 7991 return NULL; 7992 } 7993 7994 n->m_next = NULL; 7995 n->m_len = 0; 7996 n->m_len = M_TRAILINGSPACE(n); 7997 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7998 if (n->m_len > len) { 7999 t = (n->m_len - len) & ~(sizeof(long) - 1); 8000 n->m_data += t; 8001 n->m_len = len; 8002 } 8003 8004 len -= n->m_len; 8005 8006 if (m) 8007 m_cat(m, n); 8008 else 8009 m = n; 8010 } 8011 8012 return m; 8013 } 8014 8015 /* 8016 * Take one of the kernel's security keys and convert it into a PF_KEY 8017 * structure within an mbuf, suitable for sending up to a waiting 8018 * application in user land. 8019 * 8020 * IN: 8021 * src: A pointer to a kernel security key. 8022 * exttype: Which type of key this is. Refer to the PF_KEY data structures. 8023 * OUT: 8024 * a valid mbuf or NULL indicating an error 8025 * 8026 */ 8027 8028 static struct mbuf * 8029 key_setkey(struct seckey *src, u_int16_t exttype) 8030 { 8031 struct mbuf *m; 8032 struct sadb_key *p; 8033 int len; 8034 8035 if (src == NULL) 8036 return NULL; 8037 8038 len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src)); 8039 m = key_alloc_mbuf(len); 8040 if (m == NULL) 8041 return NULL; 8042 p = mtod(m, struct sadb_key *); 8043 bzero(p, len); 8044 p->sadb_key_len = PFKEY_UNIT64(len); 8045 p->sadb_key_exttype = exttype; 8046 p->sadb_key_bits = src->bits; 8047 bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src)); 8048 8049 return m; 8050 } 8051 8052 /* 8053 * Take one of the kernel's lifetime data structures and convert it 8054 * into a PF_KEY structure within an mbuf, suitable for sending up to 8055 * a waiting application in user land. 8056 * 8057 * IN: 8058 * src: A pointer to a kernel lifetime structure. 8059 * exttype: Which type of lifetime this is. Refer to the PF_KEY 8060 * data structures for more information. 8061 * OUT: 8062 * a valid mbuf or NULL indicating an error 8063 * 8064 */ 8065 8066 static struct mbuf * 8067 key_setlifetime(struct seclifetime *src, u_int16_t exttype) 8068 { 8069 struct mbuf *m = NULL; 8070 struct sadb_lifetime *p; 8071 int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime)); 8072 8073 if (src == NULL) 8074 return NULL; 8075 8076 m = key_alloc_mbuf(len); 8077 if (m == NULL) 8078 return m; 8079 p = mtod(m, struct sadb_lifetime *); 8080 8081 bzero(p, len); 8082 p->sadb_lifetime_len = PFKEY_UNIT64(len); 8083 p->sadb_lifetime_exttype = exttype; 8084 p->sadb_lifetime_allocations = src->allocations; 8085 p->sadb_lifetime_bytes = src->bytes; 8086 p->sadb_lifetime_addtime = src->addtime; 8087 p->sadb_lifetime_usetime = src->usetime; 8088 8089 return m; 8090 8091 }
Cache object: 8505282321c303ef544fd08305901686
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