1 /* $NetBSD: key.c,v 1.87 2014/05/19 02:51:25 rmind Exp $ */ 2 /* $FreeBSD: src/sys/netipsec/key.c,v 1.3.2.3 2004/02/14 22:23:23 bms Exp $ */ 3 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: key.c,v 1.87 2014/05/19 02:51:25 rmind Exp $"); 36 37 /* 38 * This code is referd to RFC 2367 39 */ 40 41 #include "opt_inet.h" 42 #ifdef __FreeBSD__ 43 #include "opt_inet6.h" 44 #endif 45 #include "opt_ipsec.h" 46 #ifdef __NetBSD__ 47 #include "opt_gateway.h" 48 #endif 49 50 #include <sys/types.h> 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/callout.h> 54 #include <sys/kernel.h> 55 #include <sys/mbuf.h> 56 #include <sys/domain.h> 57 #include <sys/protosw.h> 58 #include <sys/malloc.h> 59 #include <sys/socket.h> 60 #include <sys/socketvar.h> 61 #include <sys/sysctl.h> 62 #include <sys/errno.h> 63 #include <sys/proc.h> 64 #include <sys/queue.h> 65 #include <sys/syslog.h> 66 #include <sys/once.h> 67 #include <sys/cprng.h> 68 69 #include <net/if.h> 70 #include <net/route.h> 71 #include <net/raw_cb.h> 72 73 #include <netinet/in.h> 74 #include <netinet/in_systm.h> 75 #include <netinet/ip.h> 76 #include <netinet/in_var.h> 77 #ifdef INET 78 #include <netinet/ip_var.h> 79 #endif 80 81 #ifdef INET6 82 #include <netinet/ip6.h> 83 #include <netinet6/in6_var.h> 84 #include <netinet6/ip6_var.h> 85 #endif /* INET6 */ 86 87 #ifdef INET 88 #include <netinet/in_pcb.h> 89 #endif 90 #ifdef INET6 91 #include <netinet6/in6_pcb.h> 92 #endif /* INET6 */ 93 94 #include <net/pfkeyv2.h> 95 #include <netipsec/keydb.h> 96 #include <netipsec/key.h> 97 #include <netipsec/keysock.h> 98 #include <netipsec/key_debug.h> 99 100 #include <netipsec/ipsec.h> 101 #ifdef INET6 102 #include <netipsec/ipsec6.h> 103 #endif 104 #include <netipsec/ipsec_private.h> 105 106 #include <netipsec/xform.h> 107 #include <netipsec/ipsec_osdep.h> 108 #include <netipsec/ipcomp.h> 109 110 111 #include <net/net_osdep.h> 112 113 #define FULLMASK 0xff 114 #define _BITS(bytes) ((bytes) << 3) 115 116 percpu_t *pfkeystat_percpu; 117 118 /* 119 * Note on SA reference counting: 120 * - SAs that are not in DEAD state will have (total external reference + 1) 121 * following value in reference count field. they cannot be freed and are 122 * referenced from SA header. 123 * - SAs that are in DEAD state will have (total external reference) 124 * in reference count field. they are ready to be freed. reference from 125 * SA header will be removed in key_delsav(), when the reference count 126 * field hits 0 (= no external reference other than from SA header. 127 */ 128 129 u_int32_t key_debug_level = 0; 130 static u_int key_spi_trycnt = 1000; 131 static u_int32_t key_spi_minval = 0x100; 132 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 133 static u_int32_t policy_id = 0; 134 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 135 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 136 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 137 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 138 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 139 140 static u_int32_t acq_seq = 0; 141 142 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 143 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 144 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 145 /* registed list */ 146 #ifndef IPSEC_NONBLOCK_ACQUIRE 147 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 148 #endif 149 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 150 151 /* search order for SAs */ 152 /* 153 * This order is important because we must select the oldest SA 154 * for outbound processing. For inbound, This is not important. 155 */ 156 static const u_int saorder_state_valid_prefer_old[] = { 157 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 158 }; 159 static const u_int saorder_state_valid_prefer_new[] = { 160 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 161 }; 162 163 static const u_int saorder_state_alive[] = { 164 /* except DEAD */ 165 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 166 }; 167 static const u_int saorder_state_any[] = { 168 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 169 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 170 }; 171 172 static const int minsize[] = { 173 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 174 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 175 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 176 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 177 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 178 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 179 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 180 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 181 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 182 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 183 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 184 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 185 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 186 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 187 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 188 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 189 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 190 0, /* SADB_X_EXT_KMPRIVATE */ 191 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 192 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 193 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 194 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 195 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 196 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 197 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 198 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 199 }; 200 static const int maxsize[] = { 201 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 202 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 203 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 204 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 205 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 206 0, /* SADB_EXT_ADDRESS_SRC */ 207 0, /* SADB_EXT_ADDRESS_DST */ 208 0, /* SADB_EXT_ADDRESS_PROXY */ 209 0, /* SADB_EXT_KEY_AUTH */ 210 0, /* SADB_EXT_KEY_ENCRYPT */ 211 0, /* SADB_EXT_IDENTITY_SRC */ 212 0, /* SADB_EXT_IDENTITY_DST */ 213 0, /* SADB_EXT_SENSITIVITY */ 214 0, /* SADB_EXT_PROPOSAL */ 215 0, /* SADB_EXT_SUPPORTED_AUTH */ 216 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 217 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 218 0, /* SADB_X_EXT_KMPRIVATE */ 219 0, /* SADB_X_EXT_POLICY */ 220 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 221 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 222 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 223 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 224 0, /* SADB_X_EXT_NAT_T_OAI */ 225 0, /* SADB_X_EXT_NAT_T_OAR */ 226 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 227 }; 228 229 static int ipsec_esp_keymin = 256; 230 static int ipsec_esp_auth = 0; 231 static int ipsec_ah_keymin = 128; 232 233 #ifdef SYSCTL_DECL 234 SYSCTL_DECL(_net_key); 235 #endif 236 237 #ifdef SYSCTL_INT 238 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 239 &key_debug_level, 0, ""); 240 241 /* max count of trial for the decision of spi value */ 242 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 243 &key_spi_trycnt, 0, ""); 244 245 /* minimum spi value to allocate automatically. */ 246 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 247 &key_spi_minval, 0, ""); 248 249 /* maximun spi value to allocate automatically. */ 250 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 251 &key_spi_maxval, 0, ""); 252 253 /* interval to initialize randseed */ 254 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 255 &key_int_random, 0, ""); 256 257 /* lifetime for larval SA */ 258 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 259 &key_larval_lifetime, 0, ""); 260 261 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 262 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 263 &key_blockacq_count, 0, ""); 264 265 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 266 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 267 &key_blockacq_lifetime, 0, ""); 268 269 /* ESP auth */ 270 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 271 &ipsec_esp_auth, 0, ""); 272 273 /* minimum ESP key length */ 274 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 275 &ipsec_esp_keymin, 0, ""); 276 277 /* minimum AH key length */ 278 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 279 &ipsec_ah_keymin, 0, ""); 280 281 /* perfered old SA rather than new SA */ 282 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 283 &key_prefered_oldsa, 0, ""); 284 #endif /* SYSCTL_INT */ 285 286 #ifndef LIST_FOREACH 287 #define LIST_FOREACH(elm, head, field) \ 288 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field)) 289 #endif 290 #define __LIST_CHAINED(elm) \ 291 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 292 #define LIST_INSERT_TAIL(head, elm, type, field) \ 293 do {\ 294 struct type *curelm = LIST_FIRST(head); \ 295 if (curelm == NULL) {\ 296 LIST_INSERT_HEAD(head, elm, field); \ 297 } else { \ 298 while (LIST_NEXT(curelm, field)) \ 299 curelm = LIST_NEXT(curelm, field);\ 300 LIST_INSERT_AFTER(curelm, elm, field);\ 301 }\ 302 } while (0) 303 304 #define KEY_CHKSASTATE(head, sav, name) \ 305 /* do */ { \ 306 if ((head) != (sav)) { \ 307 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 308 (name), (head), (sav))); \ 309 continue; \ 310 } \ 311 } /* while (0) */ 312 313 #define KEY_CHKSPDIR(head, sp, name) \ 314 do { \ 315 if ((head) != (sp)) { \ 316 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 317 "anyway continue.\n", \ 318 (name), (head), (sp))); \ 319 } \ 320 } while (0) 321 322 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management"); 323 324 #if 1 325 #define KMALLOC(p, t, n) \ 326 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT)) 327 #define KFREE(p) \ 328 free((p), M_SECA) 329 #else 330 #define KMALLOC(p, t, n) \ 331 do { \ 332 ((p) = malloc((unsigned long)(n), M_SECA, M_NOWAIT)); \ 333 printf("%s %d: %p <- KMALLOC(%s, %d)\n", \ 334 __FILE__, __LINE__, (p), #t, n); \ 335 } while (0) 336 337 #define KFREE(p) \ 338 do { \ 339 printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \ 340 free((p), M_SECA); \ 341 } while (0) 342 #endif 343 344 /* 345 * set parameters into secpolicyindex buffer. 346 * Must allocate secpolicyindex buffer passed to this function. 347 */ 348 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 349 do { \ 350 memset((idx), 0, sizeof(struct secpolicyindex)); \ 351 (idx)->dir = (_dir); \ 352 (idx)->prefs = (ps); \ 353 (idx)->prefd = (pd); \ 354 (idx)->ul_proto = (ulp); \ 355 memcpy(&(idx)->src, (s), ((const struct sockaddr *)(s))->sa_len); \ 356 memcpy(&(idx)->dst, (d), ((const struct sockaddr *)(d))->sa_len); \ 357 } while (0) 358 359 /* 360 * set parameters into secasindex buffer. 361 * Must allocate secasindex buffer before calling this function. 362 */ 363 static int 364 key_setsecasidx (int, int, int, const struct sadb_address *, 365 const struct sadb_address *, struct secasindex *); 366 367 /* key statistics */ 368 struct _keystat { 369 u_long getspi_count; /* the avarage of count to try to get new SPI */ 370 } keystat; 371 372 struct sadb_msghdr { 373 struct sadb_msg *msg; 374 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 375 int extoff[SADB_EXT_MAX + 1]; 376 int extlen[SADB_EXT_MAX + 1]; 377 }; 378 379 static struct secasvar *key_allocsa_policy (const struct secasindex *); 380 static void key_freesp_so (struct secpolicy **); 381 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int); 382 static void key_delsp (struct secpolicy *); 383 static struct secpolicy *key_getsp (const struct secpolicyindex *); 384 static struct secpolicy *key_getspbyid (u_int32_t); 385 static u_int16_t key_newreqid (void); 386 static struct mbuf *key_gather_mbuf (struct mbuf *, 387 const struct sadb_msghdr *, int, int, ...); 388 static int key_spdadd (struct socket *, struct mbuf *, 389 const struct sadb_msghdr *); 390 static u_int32_t key_getnewspid (void); 391 static int key_spddelete (struct socket *, struct mbuf *, 392 const struct sadb_msghdr *); 393 static int key_spddelete2 (struct socket *, struct mbuf *, 394 const struct sadb_msghdr *); 395 static int key_spdget (struct socket *, struct mbuf *, 396 const struct sadb_msghdr *); 397 static int key_spdflush (struct socket *, struct mbuf *, 398 const struct sadb_msghdr *); 399 static int key_spddump (struct socket *, struct mbuf *, 400 const struct sadb_msghdr *); 401 static struct mbuf * key_setspddump (int *errorp, pid_t); 402 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 403 static int key_nat_map (struct socket *, struct mbuf *, 404 const struct sadb_msghdr *); 405 static struct mbuf *key_setdumpsp (struct secpolicy *, 406 u_int8_t, u_int32_t, pid_t); 407 static u_int key_getspreqmsglen (const struct secpolicy *); 408 static int key_spdexpire (struct secpolicy *); 409 static struct secashead *key_newsah (const struct secasindex *); 410 static void key_delsah (struct secashead *); 411 static struct secasvar *key_newsav (struct mbuf *, 412 const struct sadb_msghdr *, struct secashead *, int *, 413 const char*, int); 414 #define KEY_NEWSAV(m, sadb, sah, e) \ 415 key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 416 static void key_delsav (struct secasvar *); 417 static struct secashead *key_getsah (const struct secasindex *); 418 static struct secasvar *key_checkspidup (const struct secasindex *, u_int32_t); 419 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 420 static int key_setsaval (struct secasvar *, struct mbuf *, 421 const struct sadb_msghdr *); 422 static int key_mature (struct secasvar *); 423 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 424 u_int8_t, u_int32_t, u_int32_t); 425 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 426 static struct mbuf *key_setsadbxtype (u_int16_t); 427 static struct mbuf *key_setsadbxfrag (u_int16_t); 428 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 429 static int key_checksalen (const union sockaddr_union *); 430 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 431 u_int32_t, pid_t, u_int16_t); 432 static struct mbuf *key_setsadbsa (struct secasvar *); 433 static struct mbuf *key_setsadbaddr (u_int16_t, 434 const struct sockaddr *, u_int8_t, u_int16_t); 435 #if 0 436 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 437 int, u_int64_t); 438 #endif 439 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 440 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 441 u_int32_t); 442 static void *key_newbuf (const void *, u_int); 443 #ifdef INET6 444 static int key_ismyaddr6 (const struct sockaddr_in6 *); 445 #endif 446 447 /* flags for key_cmpsaidx() */ 448 #define CMP_HEAD 1 /* protocol, addresses. */ 449 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 450 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 451 #define CMP_EXACTLY 4 /* all elements. */ 452 static int key_cmpsaidx 453 (const struct secasindex *, const struct secasindex *, int); 454 455 static int key_sockaddrcmp (const struct sockaddr *, const struct sockaddr *, int); 456 static int key_bbcmp (const void *, const void *, u_int); 457 static u_int16_t key_satype2proto (u_int8_t); 458 static u_int8_t key_proto2satype (u_int16_t); 459 460 static int key_getspi (struct socket *, struct mbuf *, 461 const struct sadb_msghdr *); 462 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 463 const struct secasindex *); 464 static int key_handle_natt_info (struct secasvar *, 465 const struct sadb_msghdr *); 466 static int key_set_natt_ports (union sockaddr_union *, 467 union sockaddr_union *, 468 const struct sadb_msghdr *); 469 static int key_update (struct socket *, struct mbuf *, 470 const struct sadb_msghdr *); 471 #ifdef IPSEC_DOSEQCHECK 472 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 473 #endif 474 static int key_add (struct socket *, struct mbuf *, 475 const struct sadb_msghdr *); 476 static int key_setident (struct secashead *, struct mbuf *, 477 const struct sadb_msghdr *); 478 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 479 const struct sadb_msghdr *); 480 static int key_delete (struct socket *, struct mbuf *, 481 const struct sadb_msghdr *); 482 static int key_get (struct socket *, struct mbuf *, 483 const struct sadb_msghdr *); 484 485 static void key_getcomb_setlifetime (struct sadb_comb *); 486 static struct mbuf *key_getcomb_esp (void); 487 static struct mbuf *key_getcomb_ah (void); 488 static struct mbuf *key_getcomb_ipcomp (void); 489 static struct mbuf *key_getprop (const struct secasindex *); 490 491 static int key_acquire (const struct secasindex *, struct secpolicy *); 492 #ifndef IPSEC_NONBLOCK_ACQUIRE 493 static struct secacq *key_newacq (const struct secasindex *); 494 static struct secacq *key_getacq (const struct secasindex *); 495 static struct secacq *key_getacqbyseq (u_int32_t); 496 #endif 497 static struct secspacq *key_newspacq (const struct secpolicyindex *); 498 static struct secspacq *key_getspacq (const struct secpolicyindex *); 499 static int key_acquire2 (struct socket *, struct mbuf *, 500 const struct sadb_msghdr *); 501 static int key_register (struct socket *, struct mbuf *, 502 const struct sadb_msghdr *); 503 static int key_expire (struct secasvar *); 504 static int key_flush (struct socket *, struct mbuf *, 505 const struct sadb_msghdr *); 506 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 507 int *lenp, pid_t pid); 508 static int key_dump (struct socket *, struct mbuf *, 509 const struct sadb_msghdr *); 510 static int key_promisc (struct socket *, struct mbuf *, 511 const struct sadb_msghdr *); 512 static int key_senderror (struct socket *, struct mbuf *, int); 513 static int key_validate_ext (const struct sadb_ext *, int); 514 static int key_align (struct mbuf *, struct sadb_msghdr *); 515 #if 0 516 static const char *key_getfqdn (void); 517 static const char *key_getuserfqdn (void); 518 #endif 519 static void key_sa_chgstate (struct secasvar *, u_int8_t); 520 static inline void key_sp_dead (struct secpolicy *); 521 static void key_sp_unlink (struct secpolicy *sp); 522 523 static struct mbuf *key_alloc_mbuf (int); 524 struct callout key_timehandler_ch; 525 526 #define SA_ADDREF(p) do { \ 527 (p)->refcnt++; \ 528 IPSEC_ASSERT((p)->refcnt != 0, \ 529 ("SA refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 530 } while (0) 531 #define SA_DELREF(p) do { \ 532 IPSEC_ASSERT((p)->refcnt > 0, \ 533 ("SA refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 534 (p)->refcnt--; \ 535 } while (0) 536 537 #define SP_ADDREF(p) do { \ 538 (p)->refcnt++; \ 539 IPSEC_ASSERT((p)->refcnt != 0, \ 540 ("SP refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 541 } while (0) 542 #define SP_DELREF(p) do { \ 543 IPSEC_ASSERT((p)->refcnt > 0, \ 544 ("SP refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 545 (p)->refcnt--; \ 546 } while (0) 547 548 549 static inline void 550 key_sp_dead(struct secpolicy *sp) 551 { 552 553 /* mark the SP dead */ 554 sp->state = IPSEC_SPSTATE_DEAD; 555 } 556 557 static void 558 key_sp_unlink(struct secpolicy *sp) 559 { 560 561 /* remove from SP index */ 562 if (__LIST_CHAINED(sp)) { 563 LIST_REMOVE(sp, chain); 564 /* Release refcount held just for being on chain */ 565 KEY_FREESP(&sp); 566 } 567 } 568 569 570 /* 571 * Return 0 when there are known to be no SP's for the specified 572 * direction. Otherwise return 1. This is used by IPsec code 573 * to optimize performance. 574 */ 575 int 576 key_havesp(u_int dir) 577 { 578 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 579 LIST_FIRST(&sptree[dir]) != NULL : 1); 580 } 581 582 /* %%% IPsec policy management */ 583 /* 584 * allocating a SP for OUTBOUND or INBOUND packet. 585 * Must call key_freesp() later. 586 * OUT: NULL: not found 587 * others: found and return the pointer. 588 */ 589 struct secpolicy * 590 key_allocsp(const struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 591 { 592 struct secpolicy *sp; 593 int s; 594 595 IPSEC_ASSERT(spidx != NULL, ("key_allocsp: null spidx")); 596 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 597 ("key_allocsp: invalid direction %u", dir)); 598 599 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 600 printf("DP %s from %s:%u\n", __func__, where, tag)); 601 602 /* get a SP entry */ 603 s = splsoftnet(); /*called from softclock()*/ 604 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 605 printf("*** objects\n"); 606 kdebug_secpolicyindex(spidx)); 607 608 LIST_FOREACH(sp, &sptree[dir], chain) { 609 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 610 printf("*** in SPD\n"); 611 kdebug_secpolicyindex(&sp->spidx)); 612 613 if (sp->state == IPSEC_SPSTATE_DEAD) 614 continue; 615 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 616 goto found; 617 } 618 sp = NULL; 619 found: 620 if (sp) { 621 /* sanity check */ 622 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp"); 623 624 /* found a SPD entry */ 625 sp->lastused = time_uptime; 626 SP_ADDREF(sp); 627 } 628 splx(s); 629 630 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 631 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 632 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 633 return sp; 634 } 635 636 /* 637 * allocating a SP for OUTBOUND or INBOUND packet. 638 * Must call key_freesp() later. 639 * OUT: NULL: not found 640 * others: found and return the pointer. 641 */ 642 struct secpolicy * 643 key_allocsp2(u_int32_t spi, 644 const union sockaddr_union *dst, 645 u_int8_t proto, 646 u_int dir, 647 const char* where, int tag) 648 { 649 struct secpolicy *sp; 650 int s; 651 652 IPSEC_ASSERT(dst != NULL, ("key_allocsp2: null dst")); 653 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 654 ("key_allocsp2: invalid direction %u", dir)); 655 656 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 657 printf("DP %s from %s:%u\n", __func__, where, tag)); 658 659 /* get a SP entry */ 660 s = splsoftnet(); /*called from softclock()*/ 661 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 662 printf("*** objects\n"); 663 printf("spi %u proto %u dir %u\n", spi, proto, dir); 664 kdebug_sockaddr(&dst->sa)); 665 666 LIST_FOREACH(sp, &sptree[dir], chain) { 667 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 668 printf("*** in SPD\n"); 669 kdebug_secpolicyindex(&sp->spidx)); 670 671 if (sp->state == IPSEC_SPSTATE_DEAD) 672 continue; 673 /* compare simple values, then dst address */ 674 if (sp->spidx.ul_proto != proto) 675 continue; 676 /* NB: spi's must exist and match */ 677 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 678 continue; 679 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 680 goto found; 681 } 682 sp = NULL; 683 found: 684 if (sp) { 685 /* sanity check */ 686 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2"); 687 688 /* found a SPD entry */ 689 sp->lastused = time_uptime; 690 SP_ADDREF(sp); 691 } 692 splx(s); 693 694 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 695 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 696 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 697 return sp; 698 } 699 700 /* 701 * return a policy that matches this particular inbound packet. 702 * XXX slow 703 */ 704 struct secpolicy * 705 key_gettunnel(const struct sockaddr *osrc, 706 const struct sockaddr *odst, 707 const struct sockaddr *isrc, 708 const struct sockaddr *idst, 709 const char* where, int tag) 710 { 711 struct secpolicy *sp; 712 const int dir = IPSEC_DIR_INBOUND; 713 int s; 714 struct ipsecrequest *r1, *r2, *p; 715 struct secpolicyindex spidx; 716 717 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 718 printf("DP %s from %s:%u\n", __func__, where, tag)); 719 720 if (isrc->sa_family != idst->sa_family) { 721 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.", 722 isrc->sa_family, idst->sa_family)); 723 sp = NULL; 724 goto done; 725 } 726 727 s = splsoftnet(); /*called from softclock()*/ 728 LIST_FOREACH(sp, &sptree[dir], chain) { 729 if (sp->state == IPSEC_SPSTATE_DEAD) 730 continue; 731 732 r1 = r2 = NULL; 733 for (p = sp->req; p; p = p->next) { 734 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 735 continue; 736 737 r1 = r2; 738 r2 = p; 739 740 if (!r1) { 741 /* here we look at address matches only */ 742 spidx = sp->spidx; 743 if (isrc->sa_len > sizeof(spidx.src) || 744 idst->sa_len > sizeof(spidx.dst)) 745 continue; 746 memcpy(&spidx.src, isrc, isrc->sa_len); 747 memcpy(&spidx.dst, idst, idst->sa_len); 748 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 749 continue; 750 } else { 751 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 752 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 753 continue; 754 } 755 756 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 757 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 758 continue; 759 760 goto found; 761 } 762 } 763 sp = NULL; 764 found: 765 if (sp) { 766 sp->lastused = time_uptime; 767 SP_ADDREF(sp); 768 } 769 splx(s); 770 done: 771 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 772 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 773 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 774 return sp; 775 } 776 777 /* 778 * allocating an SA entry for an *OUTBOUND* packet. 779 * checking each request entries in SP, and acquire an SA if need. 780 * OUT: 0: there are valid requests. 781 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 782 */ 783 int 784 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 785 { 786 u_int level; 787 int error; 788 789 IPSEC_ASSERT(isr != NULL, ("key_checkrequest: null isr")); 790 IPSEC_ASSERT(saidx != NULL, ("key_checkrequest: null saidx")); 791 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 792 saidx->mode == IPSEC_MODE_TUNNEL, 793 ("key_checkrequest: unexpected policy %u", saidx->mode)); 794 795 /* get current level */ 796 level = ipsec_get_reqlevel(isr); 797 798 /* 799 * XXX guard against protocol callbacks from the crypto 800 * thread as they reference ipsecrequest.sav which we 801 * temporarily null out below. Need to rethink how we 802 * handle bundled SA's in the callback thread. 803 */ 804 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 805 #if 0 806 /* 807 * We do allocate new SA only if the state of SA in the holder is 808 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 809 */ 810 if (isr->sav != NULL) { 811 if (isr->sav->sah == NULL) 812 panic("key_checkrequest: sah is null"); 813 if (isr->sav == (struct secasvar *)LIST_FIRST( 814 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 815 KEY_FREESAV(&isr->sav); 816 isr->sav = NULL; 817 } 818 } 819 #else 820 /* 821 * we free any SA stashed in the IPsec request because a different 822 * SA may be involved each time this request is checked, either 823 * because new SAs are being configured, or this request is 824 * associated with an unconnected datagram socket, or this request 825 * is associated with a system default policy. 826 * 827 * The operation may have negative impact to performance. We may 828 * want to check cached SA carefully, rather than picking new SA 829 * every time. 830 */ 831 if (isr->sav != NULL) { 832 KEY_FREESAV(&isr->sav); 833 isr->sav = NULL; 834 } 835 #endif 836 837 /* 838 * new SA allocation if no SA found. 839 * key_allocsa_policy should allocate the oldest SA available. 840 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 841 */ 842 if (isr->sav == NULL) 843 isr->sav = key_allocsa_policy(saidx); 844 845 /* When there is SA. */ 846 if (isr->sav != NULL) { 847 if (isr->sav->state != SADB_SASTATE_MATURE && 848 isr->sav->state != SADB_SASTATE_DYING) 849 return EINVAL; 850 return 0; 851 } 852 853 /* there is no SA */ 854 error = key_acquire(saidx, isr->sp); 855 if (error != 0) { 856 /* XXX What should I do ? */ 857 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " 858 "from key_acquire.\n", error)); 859 return error; 860 } 861 862 if (level != IPSEC_LEVEL_REQUIRE) { 863 /* XXX sigh, the interface to this routine is botched */ 864 IPSEC_ASSERT(isr->sav == NULL, ("key_checkrequest: unexpected SA")); 865 return 0; 866 } else { 867 return ENOENT; 868 } 869 } 870 871 /* 872 * allocating a SA for policy entry from SAD. 873 * NOTE: searching SAD of aliving state. 874 * OUT: NULL: not found. 875 * others: found and return the pointer. 876 */ 877 static struct secasvar * 878 key_allocsa_policy(const struct secasindex *saidx) 879 { 880 struct secashead *sah; 881 struct secasvar *sav; 882 u_int stateidx, state; 883 const u_int *saorder_state_valid; 884 int arraysize; 885 886 LIST_FOREACH(sah, &sahtree, chain) { 887 if (sah->state == SADB_SASTATE_DEAD) 888 continue; 889 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) 890 goto found; 891 } 892 893 return NULL; 894 895 found: 896 897 /* 898 * search a valid state list for outbound packet. 899 * This search order is important. 900 */ 901 if (key_prefered_oldsa) { 902 saorder_state_valid = saorder_state_valid_prefer_old; 903 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 904 } else { 905 saorder_state_valid = saorder_state_valid_prefer_new; 906 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 907 } 908 909 /* search valid state */ 910 for (stateidx = 0; 911 stateidx < arraysize; 912 stateidx++) { 913 914 state = saorder_state_valid[stateidx]; 915 916 sav = key_do_allocsa_policy(sah, state); 917 if (sav != NULL) 918 return sav; 919 } 920 921 return NULL; 922 } 923 924 /* 925 * searching SAD with direction, protocol, mode and state. 926 * called by key_allocsa_policy(). 927 * OUT: 928 * NULL : not found 929 * others : found, pointer to a SA. 930 */ 931 static struct secasvar * 932 key_do_allocsa_policy(struct secashead *sah, u_int state) 933 { 934 struct secasvar *sav, *nextsav, *candidate, *d; 935 936 /* initilize */ 937 candidate = NULL; 938 939 for (sav = LIST_FIRST(&sah->savtree[state]); 940 sav != NULL; 941 sav = nextsav) { 942 943 nextsav = LIST_NEXT(sav, chain); 944 945 /* sanity check */ 946 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy"); 947 948 /* initialize */ 949 if (candidate == NULL) { 950 candidate = sav; 951 continue; 952 } 953 954 /* Which SA is the better ? */ 955 956 /* sanity check 2 */ 957 if (candidate->lft_c == NULL || sav->lft_c == NULL) 958 panic("key_do_allocsa_policy: " 959 "lifetime_current is NULL"); 960 961 /* What the best method is to compare ? */ 962 if (key_prefered_oldsa) { 963 if (candidate->lft_c->sadb_lifetime_addtime > 964 sav->lft_c->sadb_lifetime_addtime) { 965 candidate = sav; 966 } 967 continue; 968 /*NOTREACHED*/ 969 } 970 971 /* prefered new sa rather than old sa */ 972 if (candidate->lft_c->sadb_lifetime_addtime < 973 sav->lft_c->sadb_lifetime_addtime) { 974 d = candidate; 975 candidate = sav; 976 } else 977 d = sav; 978 979 /* 980 * prepared to delete the SA when there is more 981 * suitable candidate and the lifetime of the SA is not 982 * permanent. 983 */ 984 if (d->lft_c->sadb_lifetime_addtime != 0) { 985 struct mbuf *m, *result = 0; 986 uint8_t satype; 987 988 key_sa_chgstate(d, SADB_SASTATE_DEAD); 989 990 IPSEC_ASSERT(d->refcnt > 0, 991 ("key_do_allocsa_policy: bogus ref count")); 992 993 satype = key_proto2satype(d->sah->saidx.proto); 994 if (satype == 0) 995 goto msgfail; 996 997 m = key_setsadbmsg(SADB_DELETE, 0, 998 satype, 0, 0, d->refcnt - 1); 999 if (!m) 1000 goto msgfail; 1001 result = m; 1002 1003 /* set sadb_address for saidx's. */ 1004 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1005 &d->sah->saidx.src.sa, 1006 d->sah->saidx.src.sa.sa_len << 3, 1007 IPSEC_ULPROTO_ANY); 1008 if (!m) 1009 goto msgfail; 1010 m_cat(result, m); 1011 1012 /* set sadb_address for saidx's. */ 1013 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1014 &d->sah->saidx.src.sa, 1015 d->sah->saidx.src.sa.sa_len << 3, 1016 IPSEC_ULPROTO_ANY); 1017 if (!m) 1018 goto msgfail; 1019 m_cat(result, m); 1020 1021 /* create SA extension */ 1022 m = key_setsadbsa(d); 1023 if (!m) 1024 goto msgfail; 1025 m_cat(result, m); 1026 1027 if (result->m_len < sizeof(struct sadb_msg)) { 1028 result = m_pullup(result, 1029 sizeof(struct sadb_msg)); 1030 if (result == NULL) 1031 goto msgfail; 1032 } 1033 1034 result->m_pkthdr.len = 0; 1035 for (m = result; m; m = m->m_next) 1036 result->m_pkthdr.len += m->m_len; 1037 mtod(result, struct sadb_msg *)->sadb_msg_len = 1038 PFKEY_UNIT64(result->m_pkthdr.len); 1039 1040 key_sendup_mbuf(NULL, result, 1041 KEY_SENDUP_REGISTERED); 1042 result = 0; 1043 msgfail: 1044 if (result) 1045 m_freem(result); 1046 KEY_FREESAV(&d); 1047 } 1048 } 1049 1050 if (candidate) { 1051 SA_ADDREF(candidate); 1052 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1053 printf("DP %s cause refcnt++:%d SA:%p\n", __func__, 1054 candidate->refcnt, candidate)); 1055 } 1056 return candidate; 1057 } 1058 1059 /* 1060 * allocating a usable SA entry for a *INBOUND* packet. 1061 * Must call key_freesav() later. 1062 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1063 * NULL: not found, or error occurred. 1064 * 1065 * In the comparison, no source address is used--for RFC2401 conformance. 1066 * To quote, from section 4.1: 1067 * A security association is uniquely identified by a triple consisting 1068 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1069 * security protocol (AH or ESP) identifier. 1070 * Note that, however, we do need to keep source address in IPsec SA. 1071 * IKE specification and PF_KEY specification do assume that we 1072 * keep source address in IPsec SA. We see a tricky situation here. 1073 * 1074 * sport and dport are used for NAT-T. network order is always used. 1075 */ 1076 struct secasvar * 1077 key_allocsa( 1078 const union sockaddr_union *dst, 1079 u_int proto, 1080 u_int32_t spi, 1081 u_int16_t sport, 1082 u_int16_t dport, 1083 const char* where, int tag) 1084 { 1085 struct secashead *sah; 1086 struct secasvar *sav; 1087 u_int stateidx, state; 1088 const u_int *saorder_state_valid; 1089 int arraysize; 1090 int s; 1091 int chkport = 0; 1092 1093 int must_check_spi = 1; 1094 int must_check_alg = 0; 1095 u_int16_t cpi = 0; 1096 u_int8_t algo = 0; 1097 1098 if ((sport != 0) && (dport != 0)) 1099 chkport = 1; 1100 1101 IPSEC_ASSERT(dst != NULL, ("key_allocsa: null dst address")); 1102 1103 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1104 printf("DP %s from %s:%u\n", __func__, where, tag)); 1105 1106 /* 1107 * XXX IPCOMP case 1108 * We use cpi to define spi here. In the case where cpi <= 1109 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1110 * the real spi. In this case, don't check the spi but check the 1111 * algorithm 1112 */ 1113 1114 if (proto == IPPROTO_IPCOMP) { 1115 u_int32_t tmp; 1116 tmp = ntohl(spi); 1117 cpi = (u_int16_t) tmp; 1118 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1119 algo = (u_int8_t) cpi; 1120 must_check_spi = 0; 1121 must_check_alg = 1; 1122 } 1123 } 1124 1125 /* 1126 * searching SAD. 1127 * XXX: to be checked internal IP header somewhere. Also when 1128 * IPsec tunnel packet is received. But ESP tunnel mode is 1129 * encrypted so we can't check internal IP header. 1130 */ 1131 s = splsoftnet(); /*called from softclock()*/ 1132 if (key_prefered_oldsa) { 1133 saorder_state_valid = saorder_state_valid_prefer_old; 1134 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1135 } else { 1136 saorder_state_valid = saorder_state_valid_prefer_new; 1137 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1138 } 1139 LIST_FOREACH(sah, &sahtree, chain) { 1140 /* search valid state */ 1141 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1142 state = saorder_state_valid[stateidx]; 1143 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1144 /* sanity check */ 1145 KEY_CHKSASTATE(sav->state, state, "key_allocsav"); 1146 /* do not return entries w/ unusable state */ 1147 if (sav->state != SADB_SASTATE_MATURE && 1148 sav->state != SADB_SASTATE_DYING) 1149 continue; 1150 if (proto != sav->sah->saidx.proto) 1151 continue; 1152 if (must_check_spi && spi != sav->spi) 1153 continue; 1154 /* XXX only on the ipcomp case */ 1155 if (must_check_alg && algo != sav->alg_comp) 1156 continue; 1157 1158 #if 0 /* don't check src */ 1159 /* Fix port in src->sa */ 1160 1161 /* check src address */ 1162 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0) 1163 continue; 1164 #endif 1165 /* fix port of dst address XXX*/ 1166 key_porttosaddr(__UNCONST(dst), dport); 1167 /* check dst address */ 1168 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1169 continue; 1170 SA_ADDREF(sav); 1171 goto done; 1172 } 1173 } 1174 } 1175 sav = NULL; 1176 done: 1177 splx(s); 1178 1179 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1180 printf("DP %s return SA:%p; refcnt %u\n", __func__, 1181 sav, sav ? sav->refcnt : 0)); 1182 return sav; 1183 } 1184 1185 /* 1186 * Must be called after calling key_allocsp(). 1187 * For both the packet without socket and key_freeso(). 1188 */ 1189 void 1190 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1191 { 1192 struct secpolicy *sp = *spp; 1193 1194 IPSEC_ASSERT(sp != NULL, ("key_freesp: null sp")); 1195 1196 SP_DELREF(sp); 1197 1198 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1199 printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1200 __func__, sp, sp->id, where, tag, sp->refcnt)); 1201 1202 if (sp->refcnt == 0) { 1203 *spp = NULL; 1204 key_delsp(sp); 1205 } 1206 } 1207 1208 /* 1209 * Must be called after calling key_allocsp(). 1210 * For the packet with socket. 1211 */ 1212 void 1213 key_freeso(struct socket *so) 1214 { 1215 /* sanity check */ 1216 IPSEC_ASSERT(so != NULL, ("key_freeso: null so")); 1217 1218 switch (so->so_proto->pr_domain->dom_family) { 1219 #ifdef INET 1220 case PF_INET: 1221 { 1222 struct inpcb *pcb = sotoinpcb(so); 1223 struct inpcbpolicy *sp = pcb->inp_sp; 1224 1225 /* Does it have a PCB ? */ 1226 if (pcb == NULL) 1227 return; 1228 key_freesp_so(&sp->sp_in); 1229 key_freesp_so(&sp->sp_out); 1230 } 1231 break; 1232 #endif 1233 #ifdef INET6 1234 case PF_INET6: 1235 { 1236 #ifdef HAVE_NRL_INPCB 1237 struct inpcb *pcb = sotoinpcb(so); 1238 struct inpcbpolicy *sp = pcb->inp_sp; 1239 1240 /* Does it have a PCB ? */ 1241 if (pcb == NULL) 1242 return; 1243 key_freesp_so(&sp->sp_in); 1244 key_freesp_so(&sp->sp_out); 1245 #else 1246 struct in6pcb *pcb = sotoin6pcb(so); 1247 1248 /* Does it have a PCB ? */ 1249 if (pcb == NULL) 1250 return; 1251 key_freesp_so(&pcb->in6p_sp->sp_in); 1252 key_freesp_so(&pcb->in6p_sp->sp_out); 1253 #endif 1254 } 1255 break; 1256 #endif /* INET6 */ 1257 default: 1258 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1259 so->so_proto->pr_domain->dom_family)); 1260 return; 1261 } 1262 } 1263 1264 static void 1265 key_freesp_so(struct secpolicy **sp) 1266 { 1267 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp")); 1268 1269 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1270 (*sp)->policy == IPSEC_POLICY_BYPASS) 1271 return; 1272 1273 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1274 ("key_freesp_so: invalid policy %u", (*sp)->policy)); 1275 KEY_FREESP(sp); 1276 } 1277 1278 /* 1279 * Must be called after calling key_allocsa(). 1280 * This function is called by key_freesp() to free some SA allocated 1281 * for a policy. 1282 */ 1283 void 1284 key_freesav(struct secasvar **psav, const char* where, int tag) 1285 { 1286 struct secasvar *sav = *psav; 1287 1288 IPSEC_ASSERT(sav != NULL, ("key_freesav: null sav")); 1289 1290 SA_DELREF(sav); 1291 1292 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1293 printf("DP %s SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1294 __func__, sav, (u_long)ntohl(sav->spi), where, tag, 1295 sav->refcnt)); 1296 1297 if (sav->refcnt == 0) { 1298 *psav = NULL; 1299 key_delsav(sav); 1300 } 1301 } 1302 1303 /* %%% SPD management */ 1304 /* 1305 * free security policy entry. 1306 */ 1307 static void 1308 key_delsp(struct secpolicy *sp) 1309 { 1310 int s; 1311 1312 IPSEC_ASSERT(sp != NULL, ("key_delsp: null sp")); 1313 1314 key_sp_dead(sp); 1315 1316 IPSEC_ASSERT(sp->refcnt == 0, 1317 ("key_delsp: SP with references deleted (refcnt %u)", 1318 sp->refcnt)); 1319 1320 s = splsoftnet(); /*called from softclock()*/ 1321 1322 { 1323 struct ipsecrequest *isr = sp->req, *nextisr; 1324 1325 while (isr != NULL) { 1326 if (isr->sav != NULL) { 1327 KEY_FREESAV(&isr->sav); 1328 isr->sav = NULL; 1329 } 1330 1331 nextisr = isr->next; 1332 KFREE(isr); 1333 isr = nextisr; 1334 } 1335 } 1336 1337 KFREE(sp); 1338 1339 splx(s); 1340 } 1341 1342 /* 1343 * search SPD 1344 * OUT: NULL : not found 1345 * others : found, pointer to a SP. 1346 */ 1347 static struct secpolicy * 1348 key_getsp(const struct secpolicyindex *spidx) 1349 { 1350 struct secpolicy *sp; 1351 1352 IPSEC_ASSERT(spidx != NULL, ("key_getsp: null spidx")); 1353 1354 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1355 if (sp->state == IPSEC_SPSTATE_DEAD) 1356 continue; 1357 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1358 SP_ADDREF(sp); 1359 return sp; 1360 } 1361 } 1362 1363 return NULL; 1364 } 1365 1366 /* 1367 * get SP by index. 1368 * OUT: NULL : not found 1369 * others : found, pointer to a SP. 1370 */ 1371 static struct secpolicy * 1372 key_getspbyid(u_int32_t id) 1373 { 1374 struct secpolicy *sp; 1375 1376 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1377 if (sp->state == IPSEC_SPSTATE_DEAD) 1378 continue; 1379 if (sp->id == id) { 1380 SP_ADDREF(sp); 1381 return sp; 1382 } 1383 } 1384 1385 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1386 if (sp->state == IPSEC_SPSTATE_DEAD) 1387 continue; 1388 if (sp->id == id) { 1389 SP_ADDREF(sp); 1390 return sp; 1391 } 1392 } 1393 1394 return NULL; 1395 } 1396 1397 struct secpolicy * 1398 key_newsp(const char* where, int tag) 1399 { 1400 struct secpolicy *newsp = NULL; 1401 1402 newsp = (struct secpolicy *) 1403 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); 1404 if (newsp) { 1405 newsp->refcnt = 1; 1406 newsp->req = NULL; 1407 } 1408 1409 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1410 printf("DP %s from %s:%u return SP:%p\n", __func__, 1411 where, tag, newsp)); 1412 return newsp; 1413 } 1414 1415 /* 1416 * create secpolicy structure from sadb_x_policy structure. 1417 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1418 * so must be set properly later. 1419 */ 1420 struct secpolicy * 1421 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1422 { 1423 struct secpolicy *newsp; 1424 1425 /* sanity check */ 1426 if (xpl0 == NULL) 1427 panic("key_msg2sp: NULL pointer was passed"); 1428 if (len < sizeof(*xpl0)) 1429 panic("key_msg2sp: invalid length"); 1430 if (len != PFKEY_EXTLEN(xpl0)) { 1431 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1432 *error = EINVAL; 1433 return NULL; 1434 } 1435 1436 if ((newsp = KEY_NEWSP()) == NULL) { 1437 *error = ENOBUFS; 1438 return NULL; 1439 } 1440 1441 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1442 newsp->policy = xpl0->sadb_x_policy_type; 1443 1444 /* check policy */ 1445 switch (xpl0->sadb_x_policy_type) { 1446 case IPSEC_POLICY_DISCARD: 1447 case IPSEC_POLICY_NONE: 1448 case IPSEC_POLICY_ENTRUST: 1449 case IPSEC_POLICY_BYPASS: 1450 newsp->req = NULL; 1451 break; 1452 1453 case IPSEC_POLICY_IPSEC: 1454 { 1455 int tlen; 1456 const struct sadb_x_ipsecrequest *xisr; 1457 uint16_t xisr_reqid; 1458 struct ipsecrequest **p_isr = &newsp->req; 1459 1460 /* validity check */ 1461 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1462 ipseclog((LOG_DEBUG, 1463 "key_msg2sp: Invalid msg length.\n")); 1464 KEY_FREESP(&newsp); 1465 *error = EINVAL; 1466 return NULL; 1467 } 1468 1469 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1470 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1471 1472 while (tlen > 0) { 1473 /* length check */ 1474 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1475 ipseclog((LOG_DEBUG, "key_msg2sp: " 1476 "invalid ipsecrequest length.\n")); 1477 KEY_FREESP(&newsp); 1478 *error = EINVAL; 1479 return NULL; 1480 } 1481 1482 /* allocate request buffer */ 1483 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); 1484 if ((*p_isr) == NULL) { 1485 ipseclog((LOG_DEBUG, 1486 "key_msg2sp: No more memory.\n")); 1487 KEY_FREESP(&newsp); 1488 *error = ENOBUFS; 1489 return NULL; 1490 } 1491 memset(*p_isr, 0, sizeof(**p_isr)); 1492 1493 /* set values */ 1494 (*p_isr)->next = NULL; 1495 1496 switch (xisr->sadb_x_ipsecrequest_proto) { 1497 case IPPROTO_ESP: 1498 case IPPROTO_AH: 1499 case IPPROTO_IPCOMP: 1500 break; 1501 default: 1502 ipseclog((LOG_DEBUG, 1503 "key_msg2sp: invalid proto type=%u\n", 1504 xisr->sadb_x_ipsecrequest_proto)); 1505 KEY_FREESP(&newsp); 1506 *error = EPROTONOSUPPORT; 1507 return NULL; 1508 } 1509 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1510 1511 switch (xisr->sadb_x_ipsecrequest_mode) { 1512 case IPSEC_MODE_TRANSPORT: 1513 case IPSEC_MODE_TUNNEL: 1514 break; 1515 case IPSEC_MODE_ANY: 1516 default: 1517 ipseclog((LOG_DEBUG, 1518 "key_msg2sp: invalid mode=%u\n", 1519 xisr->sadb_x_ipsecrequest_mode)); 1520 KEY_FREESP(&newsp); 1521 *error = EINVAL; 1522 return NULL; 1523 } 1524 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1525 1526 switch (xisr->sadb_x_ipsecrequest_level) { 1527 case IPSEC_LEVEL_DEFAULT: 1528 case IPSEC_LEVEL_USE: 1529 case IPSEC_LEVEL_REQUIRE: 1530 break; 1531 case IPSEC_LEVEL_UNIQUE: 1532 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1533 /* validity check */ 1534 /* 1535 * If range violation of reqid, kernel will 1536 * update it, don't refuse it. 1537 */ 1538 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1539 ipseclog((LOG_DEBUG, 1540 "key_msg2sp: reqid=%d range " 1541 "violation, updated by kernel.\n", 1542 xisr_reqid)); 1543 xisr_reqid = 0; 1544 } 1545 1546 /* allocate new reqid id if reqid is zero. */ 1547 if (xisr_reqid == 0) { 1548 u_int16_t reqid; 1549 if ((reqid = key_newreqid()) == 0) { 1550 KEY_FREESP(&newsp); 1551 *error = ENOBUFS; 1552 return NULL; 1553 } 1554 (*p_isr)->saidx.reqid = reqid; 1555 } else { 1556 /* set it for manual keying. */ 1557 (*p_isr)->saidx.reqid = xisr_reqid; 1558 } 1559 break; 1560 1561 default: 1562 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1563 xisr->sadb_x_ipsecrequest_level)); 1564 KEY_FREESP(&newsp); 1565 *error = EINVAL; 1566 return NULL; 1567 } 1568 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1569 1570 /* set IP addresses if there */ 1571 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1572 const struct sockaddr *paddr; 1573 1574 paddr = (const struct sockaddr *)(xisr + 1); 1575 1576 /* validity check */ 1577 if (paddr->sa_len 1578 > sizeof((*p_isr)->saidx.src)) { 1579 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1580 "address length.\n")); 1581 KEY_FREESP(&newsp); 1582 *error = EINVAL; 1583 return NULL; 1584 } 1585 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1586 1587 paddr = (const struct sockaddr *)((const char *)paddr 1588 + paddr->sa_len); 1589 1590 /* validity check */ 1591 if (paddr->sa_len 1592 > sizeof((*p_isr)->saidx.dst)) { 1593 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1594 "address length.\n")); 1595 KEY_FREESP(&newsp); 1596 *error = EINVAL; 1597 return NULL; 1598 } 1599 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1600 } 1601 1602 (*p_isr)->sav = NULL; 1603 (*p_isr)->sp = newsp; 1604 1605 /* initialization for the next. */ 1606 p_isr = &(*p_isr)->next; 1607 tlen -= xisr->sadb_x_ipsecrequest_len; 1608 1609 /* validity check */ 1610 if (tlen < 0) { 1611 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1612 KEY_FREESP(&newsp); 1613 *error = EINVAL; 1614 return NULL; 1615 } 1616 1617 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr 1618 + xisr->sadb_x_ipsecrequest_len); 1619 } 1620 } 1621 break; 1622 default: 1623 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1624 KEY_FREESP(&newsp); 1625 *error = EINVAL; 1626 return NULL; 1627 } 1628 1629 *error = 0; 1630 return newsp; 1631 } 1632 1633 static u_int16_t 1634 key_newreqid(void) 1635 { 1636 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1637 1638 auto_reqid = (auto_reqid == 0xffff 1639 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1640 1641 /* XXX should be unique check */ 1642 1643 return auto_reqid; 1644 } 1645 1646 /* 1647 * copy secpolicy struct to sadb_x_policy structure indicated. 1648 */ 1649 struct mbuf * 1650 key_sp2msg(const struct secpolicy *sp) 1651 { 1652 struct sadb_x_policy *xpl; 1653 int tlen; 1654 char *p; 1655 struct mbuf *m; 1656 1657 /* sanity check. */ 1658 if (sp == NULL) 1659 panic("key_sp2msg: NULL pointer was passed"); 1660 1661 tlen = key_getspreqmsglen(sp); 1662 1663 m = key_alloc_mbuf(tlen); 1664 if (!m || m->m_next) { /*XXX*/ 1665 if (m) 1666 m_freem(m); 1667 return NULL; 1668 } 1669 1670 m->m_len = tlen; 1671 m->m_next = NULL; 1672 xpl = mtod(m, struct sadb_x_policy *); 1673 memset(xpl, 0, tlen); 1674 1675 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1676 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1677 xpl->sadb_x_policy_type = sp->policy; 1678 xpl->sadb_x_policy_dir = sp->spidx.dir; 1679 xpl->sadb_x_policy_id = sp->id; 1680 p = (char *)xpl + sizeof(*xpl); 1681 1682 /* if is the policy for ipsec ? */ 1683 if (sp->policy == IPSEC_POLICY_IPSEC) { 1684 struct sadb_x_ipsecrequest *xisr; 1685 struct ipsecrequest *isr; 1686 1687 for (isr = sp->req; isr != NULL; isr = isr->next) { 1688 1689 xisr = (struct sadb_x_ipsecrequest *)p; 1690 1691 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1692 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1693 xisr->sadb_x_ipsecrequest_level = isr->level; 1694 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1695 1696 p += sizeof(*xisr); 1697 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1698 p += isr->saidx.src.sa.sa_len; 1699 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1700 p += isr->saidx.src.sa.sa_len; 1701 1702 xisr->sadb_x_ipsecrequest_len = 1703 PFKEY_ALIGN8(sizeof(*xisr) 1704 + isr->saidx.src.sa.sa_len 1705 + isr->saidx.dst.sa.sa_len); 1706 } 1707 } 1708 1709 return m; 1710 } 1711 1712 /* m will not be freed nor modified */ 1713 static struct mbuf * 1714 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1715 int ndeep, int nitem, ...) 1716 { 1717 va_list ap; 1718 int idx; 1719 int i; 1720 struct mbuf *result = NULL, *n; 1721 int len; 1722 1723 if (m == NULL || mhp == NULL) 1724 panic("null pointer passed to key_gather"); 1725 1726 va_start(ap, nitem); 1727 for (i = 0; i < nitem; i++) { 1728 idx = va_arg(ap, int); 1729 if (idx < 0 || idx > SADB_EXT_MAX) 1730 goto fail; 1731 /* don't attempt to pull empty extension */ 1732 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1733 continue; 1734 if (idx != SADB_EXT_RESERVED && 1735 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1736 continue; 1737 1738 if (idx == SADB_EXT_RESERVED) { 1739 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1740 #ifdef DIAGNOSTIC 1741 if (len > MHLEN) 1742 panic("assumption failed"); 1743 #endif 1744 MGETHDR(n, M_DONTWAIT, MT_DATA); 1745 if (!n) 1746 goto fail; 1747 n->m_len = len; 1748 n->m_next = NULL; 1749 m_copydata(m, 0, sizeof(struct sadb_msg), 1750 mtod(n, void *)); 1751 } else if (i < ndeep) { 1752 len = mhp->extlen[idx]; 1753 n = key_alloc_mbuf(len); 1754 if (!n || n->m_next) { /*XXX*/ 1755 if (n) 1756 m_freem(n); 1757 goto fail; 1758 } 1759 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1760 mtod(n, void *)); 1761 } else { 1762 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1763 M_DONTWAIT); 1764 } 1765 if (n == NULL) 1766 goto fail; 1767 1768 if (result) 1769 m_cat(result, n); 1770 else 1771 result = n; 1772 } 1773 va_end(ap); 1774 1775 if ((result->m_flags & M_PKTHDR) != 0) { 1776 result->m_pkthdr.len = 0; 1777 for (n = result; n; n = n->m_next) 1778 result->m_pkthdr.len += n->m_len; 1779 } 1780 1781 return result; 1782 1783 fail: 1784 va_end(ap); 1785 m_freem(result); 1786 return NULL; 1787 } 1788 1789 /* 1790 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1791 * add an entry to SP database, when received 1792 * <base, address(SD), (lifetime(H),) policy> 1793 * from the user(?). 1794 * Adding to SP database, 1795 * and send 1796 * <base, address(SD), (lifetime(H),) policy> 1797 * to the socket which was send. 1798 * 1799 * SPDADD set a unique policy entry. 1800 * SPDSETIDX like SPDADD without a part of policy requests. 1801 * SPDUPDATE replace a unique policy entry. 1802 * 1803 * m will always be freed. 1804 */ 1805 static int 1806 key_spdadd(struct socket *so, struct mbuf *m, 1807 const struct sadb_msghdr *mhp) 1808 { 1809 const struct sadb_address *src0, *dst0; 1810 const struct sadb_x_policy *xpl0; 1811 struct sadb_x_policy *xpl; 1812 const struct sadb_lifetime *lft = NULL; 1813 struct secpolicyindex spidx; 1814 struct secpolicy *newsp; 1815 int error; 1816 1817 /* sanity check */ 1818 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 1819 panic("key_spdadd: NULL pointer is passed"); 1820 1821 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1822 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1823 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1824 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1825 return key_senderror(so, m, EINVAL); 1826 } 1827 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1828 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1829 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1830 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1831 return key_senderror(so, m, EINVAL); 1832 } 1833 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1834 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1835 < sizeof(struct sadb_lifetime)) { 1836 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1837 return key_senderror(so, m, EINVAL); 1838 } 1839 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1840 } 1841 1842 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1843 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1844 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1845 1846 /* make secindex */ 1847 /* XXX boundary check against sa_len */ 1848 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1849 src0 + 1, 1850 dst0 + 1, 1851 src0->sadb_address_prefixlen, 1852 dst0->sadb_address_prefixlen, 1853 src0->sadb_address_proto, 1854 &spidx); 1855 1856 /* checking the direciton. */ 1857 switch (xpl0->sadb_x_policy_dir) { 1858 case IPSEC_DIR_INBOUND: 1859 case IPSEC_DIR_OUTBOUND: 1860 break; 1861 default: 1862 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1863 mhp->msg->sadb_msg_errno = EINVAL; 1864 return 0; 1865 } 1866 1867 /* check policy */ 1868 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1869 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1870 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1871 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1872 return key_senderror(so, m, EINVAL); 1873 } 1874 1875 /* policy requests are mandatory when action is ipsec. */ 1876 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1877 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1878 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1879 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1880 return key_senderror(so, m, EINVAL); 1881 } 1882 1883 /* 1884 * checking there is SP already or not. 1885 * SPDUPDATE doesn't depend on whether there is a SP or not. 1886 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1887 * then error. 1888 */ 1889 newsp = key_getsp(&spidx); 1890 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1891 if (newsp) { 1892 key_sp_dead(newsp); 1893 key_sp_unlink(newsp); /* XXX jrs ordering */ 1894 KEY_FREESP(&newsp); 1895 newsp = NULL; 1896 } 1897 } else { 1898 if (newsp != NULL) { 1899 KEY_FREESP(&newsp); 1900 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1901 return key_senderror(so, m, EEXIST); 1902 } 1903 } 1904 1905 /* allocation new SP entry */ 1906 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1907 return key_senderror(so, m, error); 1908 } 1909 1910 if ((newsp->id = key_getnewspid()) == 0) { 1911 KFREE(newsp); 1912 return key_senderror(so, m, ENOBUFS); 1913 } 1914 1915 /* XXX boundary check against sa_len */ 1916 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1917 src0 + 1, 1918 dst0 + 1, 1919 src0->sadb_address_prefixlen, 1920 dst0->sadb_address_prefixlen, 1921 src0->sadb_address_proto, 1922 &newsp->spidx); 1923 1924 /* sanity check on addr pair */ 1925 if (((const struct sockaddr *)(src0 + 1))->sa_family != 1926 ((const struct sockaddr *)(dst0+ 1))->sa_family) { 1927 KFREE(newsp); 1928 return key_senderror(so, m, EINVAL); 1929 } 1930 if (((const struct sockaddr *)(src0 + 1))->sa_len != 1931 ((const struct sockaddr *)(dst0+ 1))->sa_len) { 1932 KFREE(newsp); 1933 return key_senderror(so, m, EINVAL); 1934 } 1935 1936 newsp->created = time_uptime; 1937 newsp->lastused = newsp->created; 1938 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1939 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1940 1941 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1942 newsp->state = IPSEC_SPSTATE_ALIVE; 1943 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1944 1945 /* delete the entry in spacqtree */ 1946 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1947 struct secspacq *spacq; 1948 if ((spacq = key_getspacq(&spidx)) != NULL) { 1949 /* reset counter in order to deletion by timehandler. */ 1950 spacq->created = time_uptime; 1951 spacq->count = 0; 1952 } 1953 } 1954 1955 #if defined(__NetBSD__) 1956 /* Invalidate all cached SPD pointers in the PCBs. */ 1957 ipsec_invalpcbcacheall(); 1958 1959 #if defined(GATEWAY) 1960 /* Invalidate the ipflow cache, as well. */ 1961 ipflow_invalidate_all(0); 1962 #ifdef INET6 1963 ip6flow_invalidate_all(0); 1964 #endif /* INET6 */ 1965 #endif /* GATEWAY */ 1966 #endif /* __NetBSD__ */ 1967 1968 { 1969 struct mbuf *n, *mpolicy; 1970 struct sadb_msg *newmsg; 1971 int off; 1972 1973 /* create new sadb_msg to reply. */ 1974 if (lft) { 1975 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1976 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1977 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1978 } else { 1979 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1980 SADB_X_EXT_POLICY, 1981 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1982 } 1983 if (!n) 1984 return key_senderror(so, m, ENOBUFS); 1985 1986 if (n->m_len < sizeof(*newmsg)) { 1987 n = m_pullup(n, sizeof(*newmsg)); 1988 if (!n) 1989 return key_senderror(so, m, ENOBUFS); 1990 } 1991 newmsg = mtod(n, struct sadb_msg *); 1992 newmsg->sadb_msg_errno = 0; 1993 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1994 1995 off = 0; 1996 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1997 sizeof(*xpl), &off); 1998 if (mpolicy == NULL) { 1999 /* n is already freed */ 2000 return key_senderror(so, m, ENOBUFS); 2001 } 2002 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2003 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2004 m_freem(n); 2005 return key_senderror(so, m, EINVAL); 2006 } 2007 xpl->sadb_x_policy_id = newsp->id; 2008 2009 m_freem(m); 2010 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2011 } 2012 } 2013 2014 /* 2015 * get new policy id. 2016 * OUT: 2017 * 0: failure. 2018 * others: success. 2019 */ 2020 static u_int32_t 2021 key_getnewspid(void) 2022 { 2023 u_int32_t newid = 0; 2024 int count = key_spi_trycnt; /* XXX */ 2025 struct secpolicy *sp; 2026 2027 /* when requesting to allocate spi ranged */ 2028 while (count--) { 2029 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2030 2031 if ((sp = key_getspbyid(newid)) == NULL) 2032 break; 2033 2034 KEY_FREESP(&sp); 2035 } 2036 2037 if (count == 0 || newid == 0) { 2038 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2039 return 0; 2040 } 2041 2042 return newid; 2043 } 2044 2045 /* 2046 * SADB_SPDDELETE processing 2047 * receive 2048 * <base, address(SD), policy(*)> 2049 * from the user(?), and set SADB_SASTATE_DEAD, 2050 * and send, 2051 * <base, address(SD), policy(*)> 2052 * to the ikmpd. 2053 * policy(*) including direction of policy. 2054 * 2055 * m will always be freed. 2056 */ 2057 static int 2058 key_spddelete(struct socket *so, struct mbuf *m, 2059 const struct sadb_msghdr *mhp) 2060 { 2061 struct sadb_address *src0, *dst0; 2062 struct sadb_x_policy *xpl0; 2063 struct secpolicyindex spidx; 2064 struct secpolicy *sp; 2065 2066 /* sanity check */ 2067 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2068 panic("key_spddelete: NULL pointer is passed"); 2069 2070 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2071 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2072 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2073 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2074 return key_senderror(so, m, EINVAL); 2075 } 2076 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2077 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2078 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2079 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2080 return key_senderror(so, m, EINVAL); 2081 } 2082 2083 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2084 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2085 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2086 2087 /* make secindex */ 2088 /* XXX boundary check against sa_len */ 2089 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2090 src0 + 1, 2091 dst0 + 1, 2092 src0->sadb_address_prefixlen, 2093 dst0->sadb_address_prefixlen, 2094 src0->sadb_address_proto, 2095 &spidx); 2096 2097 /* checking the direciton. */ 2098 switch (xpl0->sadb_x_policy_dir) { 2099 case IPSEC_DIR_INBOUND: 2100 case IPSEC_DIR_OUTBOUND: 2101 break; 2102 default: 2103 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2104 return key_senderror(so, m, EINVAL); 2105 } 2106 2107 /* Is there SP in SPD ? */ 2108 if ((sp = key_getsp(&spidx)) == NULL) { 2109 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2110 return key_senderror(so, m, EINVAL); 2111 } 2112 2113 /* save policy id to buffer to be returned. */ 2114 xpl0->sadb_x_policy_id = sp->id; 2115 2116 key_sp_dead(sp); 2117 key_sp_unlink(sp); /* XXX jrs ordering */ 2118 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2119 2120 #if defined(__NetBSD__) 2121 /* Invalidate all cached SPD pointers in the PCBs. */ 2122 ipsec_invalpcbcacheall(); 2123 2124 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2125 #endif /* __NetBSD__ */ 2126 2127 { 2128 struct mbuf *n; 2129 struct sadb_msg *newmsg; 2130 2131 /* create new sadb_msg to reply. */ 2132 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2133 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2134 if (!n) 2135 return key_senderror(so, m, ENOBUFS); 2136 2137 newmsg = mtod(n, struct sadb_msg *); 2138 newmsg->sadb_msg_errno = 0; 2139 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2140 2141 m_freem(m); 2142 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2143 } 2144 } 2145 2146 /* 2147 * SADB_SPDDELETE2 processing 2148 * receive 2149 * <base, policy(*)> 2150 * from the user(?), and set SADB_SASTATE_DEAD, 2151 * and send, 2152 * <base, policy(*)> 2153 * to the ikmpd. 2154 * policy(*) including direction of policy. 2155 * 2156 * m will always be freed. 2157 */ 2158 static int 2159 key_spddelete2(struct socket *so, struct mbuf *m, 2160 const struct sadb_msghdr *mhp) 2161 { 2162 u_int32_t id; 2163 struct secpolicy *sp; 2164 2165 /* sanity check */ 2166 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2167 panic("key_spddelete2: NULL pointer is passed"); 2168 2169 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2170 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2171 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2172 key_senderror(so, m, EINVAL); 2173 return 0; 2174 } 2175 2176 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2177 2178 /* Is there SP in SPD ? */ 2179 if ((sp = key_getspbyid(id)) == NULL) { 2180 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2181 return key_senderror(so, m, EINVAL); 2182 } 2183 2184 key_sp_dead(sp); 2185 key_sp_unlink(sp); /* XXX jrs ordering */ 2186 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2187 sp = NULL; 2188 2189 #if defined(__NetBSD__) 2190 /* Invalidate all cached SPD pointers in the PCBs. */ 2191 ipsec_invalpcbcacheall(); 2192 2193 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2194 #endif /* __NetBSD__ */ 2195 2196 { 2197 struct mbuf *n, *nn; 2198 struct sadb_msg *newmsg; 2199 int off, len; 2200 2201 /* create new sadb_msg to reply. */ 2202 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2203 2204 if (len > MCLBYTES) 2205 return key_senderror(so, m, ENOBUFS); 2206 MGETHDR(n, M_DONTWAIT, MT_DATA); 2207 if (n && len > MHLEN) { 2208 MCLGET(n, M_DONTWAIT); 2209 if ((n->m_flags & M_EXT) == 0) { 2210 m_freem(n); 2211 n = NULL; 2212 } 2213 } 2214 if (!n) 2215 return key_senderror(so, m, ENOBUFS); 2216 2217 n->m_len = len; 2218 n->m_next = NULL; 2219 off = 0; 2220 2221 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2222 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2223 2224 #ifdef DIAGNOSTIC 2225 if (off != len) 2226 panic("length inconsistency in key_spddelete2"); 2227 #endif 2228 2229 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2230 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2231 if (!n->m_next) { 2232 m_freem(n); 2233 return key_senderror(so, m, ENOBUFS); 2234 } 2235 2236 n->m_pkthdr.len = 0; 2237 for (nn = n; nn; nn = nn->m_next) 2238 n->m_pkthdr.len += nn->m_len; 2239 2240 newmsg = mtod(n, struct sadb_msg *); 2241 newmsg->sadb_msg_errno = 0; 2242 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2243 2244 m_freem(m); 2245 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2246 } 2247 } 2248 2249 /* 2250 * SADB_X_GET processing 2251 * receive 2252 * <base, policy(*)> 2253 * from the user(?), 2254 * and send, 2255 * <base, address(SD), policy> 2256 * to the ikmpd. 2257 * policy(*) including direction of policy. 2258 * 2259 * m will always be freed. 2260 */ 2261 static int 2262 key_spdget(struct socket *so, struct mbuf *m, 2263 const struct sadb_msghdr *mhp) 2264 { 2265 u_int32_t id; 2266 struct secpolicy *sp; 2267 struct mbuf *n; 2268 2269 /* sanity check */ 2270 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2271 panic("key_spdget: NULL pointer is passed"); 2272 2273 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2274 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2275 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2276 return key_senderror(so, m, EINVAL); 2277 } 2278 2279 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2280 2281 /* Is there SP in SPD ? */ 2282 if ((sp = key_getspbyid(id)) == NULL) { 2283 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2284 return key_senderror(so, m, ENOENT); 2285 } 2286 2287 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2288 mhp->msg->sadb_msg_pid); 2289 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2290 if (n != NULL) { 2291 m_freem(m); 2292 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2293 } else 2294 return key_senderror(so, m, ENOBUFS); 2295 } 2296 2297 /* 2298 * SADB_X_SPDACQUIRE processing. 2299 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2300 * send 2301 * <base, policy(*)> 2302 * to KMD, and expect to receive 2303 * <base> with SADB_X_SPDACQUIRE if error occurred, 2304 * or 2305 * <base, policy> 2306 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2307 * policy(*) is without policy requests. 2308 * 2309 * 0 : succeed 2310 * others: error number 2311 */ 2312 int 2313 key_spdacquire(const struct secpolicy *sp) 2314 { 2315 struct mbuf *result = NULL, *m; 2316 struct secspacq *newspacq; 2317 int error; 2318 2319 /* sanity check */ 2320 if (sp == NULL) 2321 panic("key_spdacquire: NULL pointer is passed"); 2322 if (sp->req != NULL) 2323 panic("key_spdacquire: called but there is request"); 2324 if (sp->policy != IPSEC_POLICY_IPSEC) 2325 panic("key_spdacquire: policy mismathed. IPsec is expected"); 2326 2327 /* Get an entry to check whether sent message or not. */ 2328 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2329 if (key_blockacq_count < newspacq->count) { 2330 /* reset counter and do send message. */ 2331 newspacq->count = 0; 2332 } else { 2333 /* increment counter and do nothing. */ 2334 newspacq->count++; 2335 return 0; 2336 } 2337 } else { 2338 /* make new entry for blocking to send SADB_ACQUIRE. */ 2339 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2340 return ENOBUFS; 2341 2342 /* add to acqtree */ 2343 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2344 } 2345 2346 /* create new sadb_msg to reply. */ 2347 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2348 if (!m) { 2349 error = ENOBUFS; 2350 goto fail; 2351 } 2352 result = m; 2353 2354 result->m_pkthdr.len = 0; 2355 for (m = result; m; m = m->m_next) 2356 result->m_pkthdr.len += m->m_len; 2357 2358 mtod(result, struct sadb_msg *)->sadb_msg_len = 2359 PFKEY_UNIT64(result->m_pkthdr.len); 2360 2361 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2362 2363 fail: 2364 if (result) 2365 m_freem(result); 2366 return error; 2367 } 2368 2369 /* 2370 * SADB_SPDFLUSH processing 2371 * receive 2372 * <base> 2373 * from the user, and free all entries in secpctree. 2374 * and send, 2375 * <base> 2376 * to the user. 2377 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2378 * 2379 * m will always be freed. 2380 */ 2381 static int 2382 key_spdflush(struct socket *so, 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 /* sanity check */ 2390 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2391 panic("key_spdflush: NULL pointer is passed"); 2392 2393 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2394 return key_senderror(so, m, EINVAL); 2395 2396 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2397 struct secpolicy * nextsp; 2398 for (sp = LIST_FIRST(&sptree[dir]); 2399 sp != NULL; 2400 sp = nextsp) { 2401 2402 nextsp = LIST_NEXT(sp, chain); 2403 if (sp->state == IPSEC_SPSTATE_DEAD) 2404 continue; 2405 key_sp_dead(sp); 2406 key_sp_unlink(sp); 2407 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2408 continue; 2409 } 2410 } 2411 2412 #if defined(__NetBSD__) 2413 /* Invalidate all cached SPD pointers in the PCBs. */ 2414 ipsec_invalpcbcacheall(); 2415 2416 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2417 #endif /* __NetBSD__ */ 2418 2419 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2420 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2421 return key_senderror(so, m, ENOBUFS); 2422 } 2423 2424 if (m->m_next) 2425 m_freem(m->m_next); 2426 m->m_next = NULL; 2427 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2428 newmsg = mtod(m, struct sadb_msg *); 2429 newmsg->sadb_msg_errno = 0; 2430 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2431 2432 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2433 } 2434 2435 static struct sockaddr key_src = { 2436 .sa_len = 2, 2437 .sa_family = PF_KEY, 2438 }; 2439 2440 static struct mbuf * 2441 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2442 { 2443 struct secpolicy *sp; 2444 int cnt; 2445 u_int dir; 2446 struct mbuf *m, *n, *prev; 2447 int totlen; 2448 2449 *lenp = 0; 2450 2451 /* search SPD entry and get buffer size. */ 2452 cnt = 0; 2453 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2454 LIST_FOREACH(sp, &sptree[dir], chain) { 2455 cnt++; 2456 } 2457 } 2458 2459 if (cnt == 0) { 2460 *errorp = ENOENT; 2461 return (NULL); 2462 } 2463 2464 m = NULL; 2465 prev = m; 2466 totlen = 0; 2467 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2468 LIST_FOREACH(sp, &sptree[dir], chain) { 2469 --cnt; 2470 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2471 2472 if (!n) { 2473 *errorp = ENOBUFS; 2474 if (m) m_freem(m); 2475 return (NULL); 2476 } 2477 2478 totlen += n->m_pkthdr.len; 2479 if (!m) { 2480 m = n; 2481 } else { 2482 prev->m_nextpkt = n; 2483 } 2484 prev = n; 2485 } 2486 } 2487 2488 *lenp = totlen; 2489 *errorp = 0; 2490 return (m); 2491 } 2492 2493 /* 2494 * SADB_SPDDUMP processing 2495 * receive 2496 * <base> 2497 * from the user, and dump all SP leaves 2498 * and send, 2499 * <base> ..... 2500 * to the ikmpd. 2501 * 2502 * m will always be freed. 2503 */ 2504 static int 2505 key_spddump(struct socket *so, struct mbuf *m0, 2506 const struct sadb_msghdr *mhp) 2507 { 2508 struct mbuf *n; 2509 int error, len; 2510 int ok, s; 2511 pid_t pid; 2512 2513 /* sanity check */ 2514 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 2515 panic("key_spddump: NULL pointer is passed"); 2516 2517 2518 pid = mhp->msg->sadb_msg_pid; 2519 /* 2520 * If the requestor has insufficient socket-buffer space 2521 * for the entire chain, nobody gets any response to the DUMP. 2522 * XXX For now, only the requestor ever gets anything. 2523 * Moreover, if the requestor has any space at all, they receive 2524 * the entire chain, otherwise the request is refused with ENOBUFS. 2525 */ 2526 if (sbspace(&so->so_rcv) <= 0) { 2527 return key_senderror(so, m0, ENOBUFS); 2528 } 2529 2530 s = splsoftnet(); 2531 n = key_setspddump_chain(&error, &len, pid); 2532 splx(s); 2533 2534 if (n == NULL) { 2535 return key_senderror(so, m0, ENOENT); 2536 } 2537 { 2538 uint64_t *ps = PFKEY_STAT_GETREF(); 2539 ps[PFKEY_STAT_IN_TOTAL]++; 2540 ps[PFKEY_STAT_IN_BYTES] += len; 2541 PFKEY_STAT_PUTREF(); 2542 } 2543 2544 /* 2545 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2546 * The requestor receives either the entire chain, or an 2547 * error message with ENOBUFS. 2548 */ 2549 2550 /* 2551 * sbappendchainwith record takes the chain of entries, one 2552 * packet-record per SPD entry, prepends the key_src sockaddr 2553 * to each packet-record, links the sockaddr mbufs into a new 2554 * list of records, then appends the entire resulting 2555 * list to the requesting socket. 2556 */ 2557 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2558 n, SB_PRIO_ONESHOT_OVERFLOW); 2559 2560 if (!ok) { 2561 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2562 m_freem(n); 2563 return key_senderror(so, m0, ENOBUFS); 2564 } 2565 2566 m_freem(m0); 2567 return error; 2568 } 2569 2570 /* 2571 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2572 */ 2573 static int 2574 key_nat_map(struct socket *so, struct mbuf *m, 2575 const struct sadb_msghdr *mhp) 2576 { 2577 struct sadb_x_nat_t_type *type; 2578 struct sadb_x_nat_t_port *sport; 2579 struct sadb_x_nat_t_port *dport; 2580 struct sadb_address *iaddr, *raddr; 2581 struct sadb_x_nat_t_frag *frag; 2582 2583 /* sanity check */ 2584 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2585 panic("key_nat_map: NULL pointer is passed."); 2586 2587 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2588 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2589 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2590 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2591 return key_senderror(so, m, EINVAL); 2592 } 2593 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2594 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2595 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2596 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2597 return key_senderror(so, m, EINVAL); 2598 } 2599 2600 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2601 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2602 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2603 return key_senderror(so, m, EINVAL); 2604 } 2605 2606 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2607 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2608 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2609 return key_senderror(so, m, EINVAL); 2610 } 2611 2612 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2613 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2614 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2615 return key_senderror(so, m, EINVAL); 2616 } 2617 2618 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2619 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2620 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2621 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2622 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2623 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2624 2625 /* 2626 * XXX handle that, it should also contain a SA, or anything 2627 * that enable to update the SA information. 2628 */ 2629 2630 return 0; 2631 } 2632 2633 static struct mbuf * 2634 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2635 { 2636 struct mbuf *result = NULL, *m; 2637 2638 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2639 if (!m) 2640 goto fail; 2641 result = m; 2642 2643 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2644 &sp->spidx.src.sa, sp->spidx.prefs, 2645 sp->spidx.ul_proto); 2646 if (!m) 2647 goto fail; 2648 m_cat(result, m); 2649 2650 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2651 &sp->spidx.dst.sa, sp->spidx.prefd, 2652 sp->spidx.ul_proto); 2653 if (!m) 2654 goto fail; 2655 m_cat(result, m); 2656 2657 m = key_sp2msg(sp); 2658 if (!m) 2659 goto fail; 2660 m_cat(result, m); 2661 2662 if ((result->m_flags & M_PKTHDR) == 0) 2663 goto fail; 2664 2665 if (result->m_len < sizeof(struct sadb_msg)) { 2666 result = m_pullup(result, sizeof(struct sadb_msg)); 2667 if (result == NULL) 2668 goto fail; 2669 } 2670 2671 result->m_pkthdr.len = 0; 2672 for (m = result; m; m = m->m_next) 2673 result->m_pkthdr.len += m->m_len; 2674 2675 mtod(result, struct sadb_msg *)->sadb_msg_len = 2676 PFKEY_UNIT64(result->m_pkthdr.len); 2677 2678 return result; 2679 2680 fail: 2681 m_freem(result); 2682 return NULL; 2683 } 2684 2685 /* 2686 * get PFKEY message length for security policy and request. 2687 */ 2688 static u_int 2689 key_getspreqmsglen(const struct secpolicy *sp) 2690 { 2691 u_int tlen; 2692 2693 tlen = sizeof(struct sadb_x_policy); 2694 2695 /* if is the policy for ipsec ? */ 2696 if (sp->policy != IPSEC_POLICY_IPSEC) 2697 return tlen; 2698 2699 /* get length of ipsec requests */ 2700 { 2701 const struct ipsecrequest *isr; 2702 int len; 2703 2704 for (isr = sp->req; isr != NULL; isr = isr->next) { 2705 len = sizeof(struct sadb_x_ipsecrequest) 2706 + isr->saidx.src.sa.sa_len 2707 + isr->saidx.dst.sa.sa_len; 2708 2709 tlen += PFKEY_ALIGN8(len); 2710 } 2711 } 2712 2713 return tlen; 2714 } 2715 2716 /* 2717 * SADB_SPDEXPIRE processing 2718 * send 2719 * <base, address(SD), lifetime(CH), policy> 2720 * to KMD by PF_KEY. 2721 * 2722 * OUT: 0 : succeed 2723 * others : error number 2724 */ 2725 static int 2726 key_spdexpire(struct secpolicy *sp) 2727 { 2728 int s; 2729 struct mbuf *result = NULL, *m; 2730 int len; 2731 int error = -1; 2732 struct sadb_lifetime *lt; 2733 2734 /* XXX: Why do we lock ? */ 2735 s = splsoftnet(); /*called from softclock()*/ 2736 2737 /* sanity check */ 2738 if (sp == NULL) 2739 panic("key_spdexpire: NULL pointer is passed"); 2740 2741 /* set msg header */ 2742 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2743 if (!m) { 2744 error = ENOBUFS; 2745 goto fail; 2746 } 2747 result = m; 2748 2749 /* create lifetime extension (current and hard) */ 2750 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2751 m = key_alloc_mbuf(len); 2752 if (!m || m->m_next) { /*XXX*/ 2753 if (m) 2754 m_freem(m); 2755 error = ENOBUFS; 2756 goto fail; 2757 } 2758 memset(mtod(m, void *), 0, len); 2759 lt = mtod(m, struct sadb_lifetime *); 2760 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2761 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2762 lt->sadb_lifetime_allocations = 0; 2763 lt->sadb_lifetime_bytes = 0; 2764 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2765 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2766 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2767 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2768 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2769 lt->sadb_lifetime_allocations = 0; 2770 lt->sadb_lifetime_bytes = 0; 2771 lt->sadb_lifetime_addtime = sp->lifetime; 2772 lt->sadb_lifetime_usetime = sp->validtime; 2773 m_cat(result, m); 2774 2775 /* set sadb_address for source */ 2776 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2777 &sp->spidx.src.sa, 2778 sp->spidx.prefs, sp->spidx.ul_proto); 2779 if (!m) { 2780 error = ENOBUFS; 2781 goto fail; 2782 } 2783 m_cat(result, m); 2784 2785 /* set sadb_address for destination */ 2786 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2787 &sp->spidx.dst.sa, 2788 sp->spidx.prefd, sp->spidx.ul_proto); 2789 if (!m) { 2790 error = ENOBUFS; 2791 goto fail; 2792 } 2793 m_cat(result, m); 2794 2795 /* set secpolicy */ 2796 m = key_sp2msg(sp); 2797 if (!m) { 2798 error = ENOBUFS; 2799 goto fail; 2800 } 2801 m_cat(result, m); 2802 2803 if ((result->m_flags & M_PKTHDR) == 0) { 2804 error = EINVAL; 2805 goto fail; 2806 } 2807 2808 if (result->m_len < sizeof(struct sadb_msg)) { 2809 result = m_pullup(result, sizeof(struct sadb_msg)); 2810 if (result == NULL) { 2811 error = ENOBUFS; 2812 goto fail; 2813 } 2814 } 2815 2816 result->m_pkthdr.len = 0; 2817 for (m = result; m; m = m->m_next) 2818 result->m_pkthdr.len += m->m_len; 2819 2820 mtod(result, struct sadb_msg *)->sadb_msg_len = 2821 PFKEY_UNIT64(result->m_pkthdr.len); 2822 2823 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2824 2825 fail: 2826 if (result) 2827 m_freem(result); 2828 splx(s); 2829 return error; 2830 } 2831 2832 /* %%% SAD management */ 2833 /* 2834 * allocating a memory for new SA head, and copy from the values of mhp. 2835 * OUT: NULL : failure due to the lack of memory. 2836 * others : pointer to new SA head. 2837 */ 2838 static struct secashead * 2839 key_newsah(const struct secasindex *saidx) 2840 { 2841 struct secashead *newsah; 2842 2843 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx")); 2844 2845 newsah = (struct secashead *) 2846 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2847 if (newsah != NULL) { 2848 int i; 2849 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2850 LIST_INIT(&newsah->savtree[i]); 2851 newsah->saidx = *saidx; 2852 2853 /* add to saidxtree */ 2854 newsah->state = SADB_SASTATE_MATURE; 2855 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2856 } 2857 return(newsah); 2858 } 2859 2860 /* 2861 * delete SA index and all SA registerd. 2862 */ 2863 static void 2864 key_delsah(struct secashead *sah) 2865 { 2866 struct secasvar *sav, *nextsav; 2867 u_int stateidx, state; 2868 int s; 2869 int zombie = 0; 2870 2871 /* sanity check */ 2872 if (sah == NULL) 2873 panic("key_delsah: NULL pointer is passed"); 2874 2875 s = splsoftnet(); /*called from softclock()*/ 2876 2877 /* searching all SA registerd in the secindex. */ 2878 for (stateidx = 0; 2879 stateidx < _ARRAYLEN(saorder_state_any); 2880 stateidx++) { 2881 2882 state = saorder_state_any[stateidx]; 2883 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2884 sav != NULL; 2885 sav = nextsav) { 2886 2887 nextsav = LIST_NEXT(sav, chain); 2888 2889 if (sav->refcnt == 0) { 2890 /* sanity check */ 2891 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2892 KEY_FREESAV(&sav); 2893 } else { 2894 /* give up to delete this sa */ 2895 zombie++; 2896 } 2897 } 2898 } 2899 2900 /* don't delete sah only if there are savs. */ 2901 if (zombie) { 2902 splx(s); 2903 return; 2904 } 2905 2906 rtcache_free(&sah->sa_route); 2907 2908 /* remove from tree of SA index */ 2909 if (__LIST_CHAINED(sah)) 2910 LIST_REMOVE(sah, chain); 2911 2912 KFREE(sah); 2913 2914 splx(s); 2915 return; 2916 } 2917 2918 /* 2919 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2920 * and copy the values of mhp into new buffer. 2921 * When SAD message type is GETSPI: 2922 * to set sequence number from acq_seq++, 2923 * to set zero to SPI. 2924 * not to call key_setsava(). 2925 * OUT: NULL : fail 2926 * others : pointer to new secasvar. 2927 * 2928 * does not modify mbuf. does not free mbuf on error. 2929 */ 2930 static struct secasvar * 2931 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2932 struct secashead *sah, int *errp, 2933 const char* where, int tag) 2934 { 2935 struct secasvar *newsav; 2936 const struct sadb_sa *xsa; 2937 2938 /* sanity check */ 2939 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) 2940 panic("key_newsa: NULL pointer is passed"); 2941 2942 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2943 if (newsav == NULL) { 2944 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2945 *errp = ENOBUFS; 2946 goto done; 2947 } 2948 memset(newsav, 0, sizeof(struct secasvar)); 2949 2950 switch (mhp->msg->sadb_msg_type) { 2951 case SADB_GETSPI: 2952 newsav->spi = 0; 2953 2954 #ifdef IPSEC_DOSEQCHECK 2955 /* sync sequence number */ 2956 if (mhp->msg->sadb_msg_seq == 0) 2957 newsav->seq = 2958 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2959 else 2960 #endif 2961 newsav->seq = mhp->msg->sadb_msg_seq; 2962 break; 2963 2964 case SADB_ADD: 2965 /* sanity check */ 2966 if (mhp->ext[SADB_EXT_SA] == NULL) { 2967 KFREE(newsav), newsav = NULL; 2968 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2969 *errp = EINVAL; 2970 goto done; 2971 } 2972 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2973 newsav->spi = xsa->sadb_sa_spi; 2974 newsav->seq = mhp->msg->sadb_msg_seq; 2975 break; 2976 default: 2977 KFREE(newsav), newsav = NULL; 2978 *errp = EINVAL; 2979 goto done; 2980 } 2981 2982 /* copy sav values */ 2983 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2984 *errp = key_setsaval(newsav, m, mhp); 2985 if (*errp) { 2986 KFREE(newsav), newsav = NULL; 2987 goto done; 2988 } 2989 } 2990 2991 /* reset created */ 2992 newsav->created = time_uptime; 2993 newsav->pid = mhp->msg->sadb_msg_pid; 2994 2995 /* add to satree */ 2996 newsav->sah = sah; 2997 newsav->refcnt = 1; 2998 newsav->state = SADB_SASTATE_LARVAL; 2999 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 3000 secasvar, chain); 3001 done: 3002 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3003 printf("DP %s from %s:%u return SP:%p\n", __func__, 3004 where, tag, newsav)); 3005 3006 return newsav; 3007 } 3008 3009 /* 3010 * free() SA variable entry. 3011 */ 3012 static void 3013 key_delsav(struct secasvar *sav) 3014 { 3015 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav")); 3016 IPSEC_ASSERT(sav->refcnt == 0, 3017 ("key_delsav: reference count %u > 0", sav->refcnt)); 3018 3019 /* remove from SA header */ 3020 if (__LIST_CHAINED(sav)) 3021 LIST_REMOVE(sav, chain); 3022 3023 /* 3024 * Cleanup xform state. Note that zeroize'ing causes the 3025 * keys to be cleared; otherwise we must do it ourself. 3026 */ 3027 if (sav->tdb_xform != NULL) { 3028 sav->tdb_xform->xf_zeroize(sav); 3029 sav->tdb_xform = NULL; 3030 } else { 3031 if (sav->key_auth != NULL) 3032 explicit_memset(_KEYBUF(sav->key_auth), 0, 3033 _KEYLEN(sav->key_auth)); 3034 if (sav->key_enc != NULL) 3035 explicit_memset(_KEYBUF(sav->key_enc), 0, 3036 _KEYLEN(sav->key_enc)); 3037 } 3038 if (sav->key_auth != NULL) { 3039 KFREE(sav->key_auth); 3040 sav->key_auth = NULL; 3041 } 3042 if (sav->key_enc != NULL) { 3043 KFREE(sav->key_enc); 3044 sav->key_enc = NULL; 3045 } 3046 if (sav->replay != NULL) { 3047 KFREE(sav->replay); 3048 sav->replay = NULL; 3049 } 3050 if (sav->lft_c != NULL) { 3051 KFREE(sav->lft_c); 3052 sav->lft_c = NULL; 3053 } 3054 if (sav->lft_h != NULL) { 3055 KFREE(sav->lft_h); 3056 sav->lft_h = NULL; 3057 } 3058 if (sav->lft_s != NULL) { 3059 KFREE(sav->lft_s); 3060 sav->lft_s = NULL; 3061 } 3062 3063 KFREE(sav); 3064 3065 return; 3066 } 3067 3068 /* 3069 * search SAD. 3070 * OUT: 3071 * NULL : not found 3072 * others : found, pointer to a SA. 3073 */ 3074 static struct secashead * 3075 key_getsah(const struct secasindex *saidx) 3076 { 3077 struct secashead *sah; 3078 3079 LIST_FOREACH(sah, &sahtree, chain) { 3080 if (sah->state == SADB_SASTATE_DEAD) 3081 continue; 3082 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3083 return sah; 3084 } 3085 3086 return NULL; 3087 } 3088 3089 /* 3090 * check not to be duplicated SPI. 3091 * NOTE: this function is too slow due to searching all SAD. 3092 * OUT: 3093 * NULL : not found 3094 * others : found, pointer to a SA. 3095 */ 3096 static struct secasvar * 3097 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3098 { 3099 struct secashead *sah; 3100 struct secasvar *sav; 3101 3102 /* check address family */ 3103 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3104 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3105 return NULL; 3106 } 3107 3108 /* check all SAD */ 3109 LIST_FOREACH(sah, &sahtree, chain) { 3110 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3111 continue; 3112 sav = key_getsavbyspi(sah, spi); 3113 if (sav != NULL) 3114 return sav; 3115 } 3116 3117 return NULL; 3118 } 3119 3120 /* 3121 * search SAD litmited alive SA, protocol, SPI. 3122 * OUT: 3123 * NULL : not found 3124 * others : found, pointer to a SA. 3125 */ 3126 static struct secasvar * 3127 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3128 { 3129 struct secasvar *sav; 3130 u_int stateidx, state; 3131 3132 /* search all status */ 3133 for (stateidx = 0; 3134 stateidx < _ARRAYLEN(saorder_state_alive); 3135 stateidx++) { 3136 3137 state = saorder_state_alive[stateidx]; 3138 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3139 3140 /* sanity check */ 3141 if (sav->state != state) { 3142 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3143 "invalid sav->state (queue: %d SA: %d)\n", 3144 state, sav->state)); 3145 continue; 3146 } 3147 3148 if (sav->spi == spi) 3149 return sav; 3150 } 3151 } 3152 3153 return NULL; 3154 } 3155 3156 /* 3157 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3158 * You must update these if need. 3159 * OUT: 0: success. 3160 * !0: failure. 3161 * 3162 * does not modify mbuf. does not free mbuf on error. 3163 */ 3164 static int 3165 key_setsaval(struct secasvar *sav, struct mbuf *m, 3166 const struct sadb_msghdr *mhp) 3167 { 3168 int error = 0; 3169 3170 /* sanity check */ 3171 if (m == NULL || mhp == NULL || mhp->msg == NULL) 3172 panic("key_setsaval: NULL pointer is passed"); 3173 3174 /* initialization */ 3175 sav->replay = NULL; 3176 sav->key_auth = NULL; 3177 sav->key_enc = NULL; 3178 sav->lft_c = NULL; 3179 sav->lft_h = NULL; 3180 sav->lft_s = NULL; 3181 sav->tdb_xform = NULL; /* transform */ 3182 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3183 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3184 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3185 sav->natt_type = 0; 3186 sav->esp_frag = 0; 3187 3188 /* SA */ 3189 if (mhp->ext[SADB_EXT_SA] != NULL) { 3190 const struct sadb_sa *sa0; 3191 3192 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3193 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3194 error = EINVAL; 3195 goto fail; 3196 } 3197 3198 sav->alg_auth = sa0->sadb_sa_auth; 3199 sav->alg_enc = sa0->sadb_sa_encrypt; 3200 sav->flags = sa0->sadb_sa_flags; 3201 3202 /* replay window */ 3203 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3204 sav->replay = (struct secreplay *) 3205 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3206 if (sav->replay == NULL) { 3207 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3208 error = ENOBUFS; 3209 goto fail; 3210 } 3211 if (sa0->sadb_sa_replay != 0) 3212 sav->replay->bitmap = (char*)(sav->replay+1); 3213 sav->replay->wsize = sa0->sadb_sa_replay; 3214 } 3215 } 3216 3217 /* Authentication keys */ 3218 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3219 const struct sadb_key *key0; 3220 int len; 3221 3222 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3223 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3224 3225 error = 0; 3226 if (len < sizeof(*key0)) { 3227 error = EINVAL; 3228 goto fail; 3229 } 3230 switch (mhp->msg->sadb_msg_satype) { 3231 case SADB_SATYPE_AH: 3232 case SADB_SATYPE_ESP: 3233 case SADB_X_SATYPE_TCPSIGNATURE: 3234 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3235 sav->alg_auth != SADB_X_AALG_NULL) 3236 error = EINVAL; 3237 break; 3238 case SADB_X_SATYPE_IPCOMP: 3239 default: 3240 error = EINVAL; 3241 break; 3242 } 3243 if (error) { 3244 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3245 goto fail; 3246 } 3247 3248 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3249 if (sav->key_auth == NULL) { 3250 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3251 error = ENOBUFS; 3252 goto fail; 3253 } 3254 } 3255 3256 /* Encryption key */ 3257 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3258 const struct sadb_key *key0; 3259 int len; 3260 3261 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3262 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3263 3264 error = 0; 3265 if (len < sizeof(*key0)) { 3266 error = EINVAL; 3267 goto fail; 3268 } 3269 switch (mhp->msg->sadb_msg_satype) { 3270 case SADB_SATYPE_ESP: 3271 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3272 sav->alg_enc != SADB_EALG_NULL) { 3273 error = EINVAL; 3274 break; 3275 } 3276 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3277 if (sav->key_enc == NULL) { 3278 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3279 error = ENOBUFS; 3280 goto fail; 3281 } 3282 break; 3283 case SADB_X_SATYPE_IPCOMP: 3284 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3285 error = EINVAL; 3286 sav->key_enc = NULL; /*just in case*/ 3287 break; 3288 case SADB_SATYPE_AH: 3289 case SADB_X_SATYPE_TCPSIGNATURE: 3290 default: 3291 error = EINVAL; 3292 break; 3293 } 3294 if (error) { 3295 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3296 goto fail; 3297 } 3298 } 3299 3300 /* set iv */ 3301 sav->ivlen = 0; 3302 3303 switch (mhp->msg->sadb_msg_satype) { 3304 case SADB_SATYPE_AH: 3305 error = xform_init(sav, XF_AH); 3306 break; 3307 case SADB_SATYPE_ESP: 3308 error = xform_init(sav, XF_ESP); 3309 break; 3310 case SADB_X_SATYPE_IPCOMP: 3311 error = xform_init(sav, XF_IPCOMP); 3312 break; 3313 case SADB_X_SATYPE_TCPSIGNATURE: 3314 error = xform_init(sav, XF_TCPSIGNATURE); 3315 break; 3316 } 3317 if (error) { 3318 ipseclog((LOG_DEBUG, 3319 "key_setsaval: unable to initialize SA type %u.\n", 3320 mhp->msg->sadb_msg_satype)); 3321 goto fail; 3322 } 3323 3324 /* reset created */ 3325 sav->created = time_uptime; 3326 3327 /* make lifetime for CURRENT */ 3328 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3329 sizeof(struct sadb_lifetime)); 3330 if (sav->lft_c == NULL) { 3331 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3332 error = ENOBUFS; 3333 goto fail; 3334 } 3335 3336 sav->lft_c->sadb_lifetime_len = 3337 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3338 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3339 sav->lft_c->sadb_lifetime_allocations = 0; 3340 sav->lft_c->sadb_lifetime_bytes = 0; 3341 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3342 sav->lft_c->sadb_lifetime_usetime = 0; 3343 3344 /* lifetimes for HARD and SOFT */ 3345 { 3346 const struct sadb_lifetime *lft0; 3347 3348 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3349 if (lft0 != NULL) { 3350 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3351 error = EINVAL; 3352 goto fail; 3353 } 3354 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3355 sizeof(*lft0)); 3356 if (sav->lft_h == NULL) { 3357 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3358 error = ENOBUFS; 3359 goto fail; 3360 } 3361 /* to be initialize ? */ 3362 } 3363 3364 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3365 if (lft0 != NULL) { 3366 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3367 error = EINVAL; 3368 goto fail; 3369 } 3370 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3371 sizeof(*lft0)); 3372 if (sav->lft_s == NULL) { 3373 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3374 error = ENOBUFS; 3375 goto fail; 3376 } 3377 /* to be initialize ? */ 3378 } 3379 } 3380 3381 return 0; 3382 3383 fail: 3384 /* initialization */ 3385 if (sav->replay != NULL) { 3386 KFREE(sav->replay); 3387 sav->replay = NULL; 3388 } 3389 if (sav->key_auth != NULL) { 3390 KFREE(sav->key_auth); 3391 sav->key_auth = NULL; 3392 } 3393 if (sav->key_enc != NULL) { 3394 KFREE(sav->key_enc); 3395 sav->key_enc = NULL; 3396 } 3397 if (sav->lft_c != NULL) { 3398 KFREE(sav->lft_c); 3399 sav->lft_c = NULL; 3400 } 3401 if (sav->lft_h != NULL) { 3402 KFREE(sav->lft_h); 3403 sav->lft_h = NULL; 3404 } 3405 if (sav->lft_s != NULL) { 3406 KFREE(sav->lft_s); 3407 sav->lft_s = NULL; 3408 } 3409 3410 return error; 3411 } 3412 3413 /* 3414 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3415 * OUT: 0: valid 3416 * other: errno 3417 */ 3418 static int 3419 key_mature(struct secasvar *sav) 3420 { 3421 int error; 3422 3423 /* check SPI value */ 3424 switch (sav->sah->saidx.proto) { 3425 case IPPROTO_ESP: 3426 case IPPROTO_AH: 3427 if (ntohl(sav->spi) <= 255) { 3428 ipseclog((LOG_DEBUG, 3429 "key_mature: illegal range of SPI %u.\n", 3430 (u_int32_t)ntohl(sav->spi))); 3431 return EINVAL; 3432 } 3433 break; 3434 } 3435 3436 /* check satype */ 3437 switch (sav->sah->saidx.proto) { 3438 case IPPROTO_ESP: 3439 /* check flags */ 3440 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3441 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3442 ipseclog((LOG_DEBUG, "key_mature: " 3443 "invalid flag (derived) given to old-esp.\n")); 3444 return EINVAL; 3445 } 3446 error = xform_init(sav, XF_ESP); 3447 break; 3448 case IPPROTO_AH: 3449 /* check flags */ 3450 if (sav->flags & SADB_X_EXT_DERIV) { 3451 ipseclog((LOG_DEBUG, "key_mature: " 3452 "invalid flag (derived) given to AH SA.\n")); 3453 return EINVAL; 3454 } 3455 if (sav->alg_enc != SADB_EALG_NONE) { 3456 ipseclog((LOG_DEBUG, "key_mature: " 3457 "protocol and algorithm mismated.\n")); 3458 return(EINVAL); 3459 } 3460 error = xform_init(sav, XF_AH); 3461 break; 3462 case IPPROTO_IPCOMP: 3463 if (sav->alg_auth != SADB_AALG_NONE) { 3464 ipseclog((LOG_DEBUG, "key_mature: " 3465 "protocol and algorithm mismated.\n")); 3466 return(EINVAL); 3467 } 3468 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3469 && ntohl(sav->spi) >= 0x10000) { 3470 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3471 return(EINVAL); 3472 } 3473 error = xform_init(sav, XF_IPCOMP); 3474 break; 3475 case IPPROTO_TCP: 3476 if (sav->alg_enc != SADB_EALG_NONE) { 3477 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3478 "mismated.\n", __func__)); 3479 return(EINVAL); 3480 } 3481 error = xform_init(sav, XF_TCPSIGNATURE); 3482 break; 3483 default: 3484 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3485 error = EPROTONOSUPPORT; 3486 break; 3487 } 3488 if (error == 0) 3489 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3490 return (error); 3491 } 3492 3493 /* 3494 * subroutine for SADB_GET and SADB_DUMP. 3495 */ 3496 static struct mbuf * 3497 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3498 u_int32_t seq, u_int32_t pid) 3499 { 3500 struct mbuf *result = NULL, *tres = NULL, *m; 3501 int l = 0; 3502 int i; 3503 void *p; 3504 struct sadb_lifetime lt; 3505 int dumporder[] = { 3506 SADB_EXT_SA, SADB_X_EXT_SA2, 3507 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3508 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3509 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3510 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3511 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3512 SADB_X_EXT_NAT_T_TYPE, 3513 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3514 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3515 SADB_X_EXT_NAT_T_FRAG, 3516 3517 }; 3518 3519 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3520 if (m == NULL) 3521 goto fail; 3522 result = m; 3523 3524 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3525 m = NULL; 3526 p = NULL; 3527 switch (dumporder[i]) { 3528 case SADB_EXT_SA: 3529 m = key_setsadbsa(sav); 3530 break; 3531 3532 case SADB_X_EXT_SA2: 3533 m = key_setsadbxsa2(sav->sah->saidx.mode, 3534 sav->replay ? sav->replay->count : 0, 3535 sav->sah->saidx.reqid); 3536 break; 3537 3538 case SADB_EXT_ADDRESS_SRC: 3539 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3540 &sav->sah->saidx.src.sa, 3541 FULLMASK, IPSEC_ULPROTO_ANY); 3542 break; 3543 3544 case SADB_EXT_ADDRESS_DST: 3545 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3546 &sav->sah->saidx.dst.sa, 3547 FULLMASK, IPSEC_ULPROTO_ANY); 3548 break; 3549 3550 case SADB_EXT_KEY_AUTH: 3551 if (!sav->key_auth) 3552 continue; 3553 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3554 p = sav->key_auth; 3555 break; 3556 3557 case SADB_EXT_KEY_ENCRYPT: 3558 if (!sav->key_enc) 3559 continue; 3560 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3561 p = sav->key_enc; 3562 break; 3563 3564 case SADB_EXT_LIFETIME_CURRENT: 3565 if (!sav->lft_c) 3566 continue; 3567 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3568 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3569 lt.sadb_lifetime_addtime += time_second - time_uptime; 3570 lt.sadb_lifetime_usetime += time_second - time_uptime; 3571 p = < 3572 break; 3573 3574 case SADB_EXT_LIFETIME_HARD: 3575 if (!sav->lft_h) 3576 continue; 3577 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3578 p = sav->lft_h; 3579 break; 3580 3581 case SADB_EXT_LIFETIME_SOFT: 3582 if (!sav->lft_s) 3583 continue; 3584 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3585 p = sav->lft_s; 3586 break; 3587 3588 case SADB_X_EXT_NAT_T_TYPE: 3589 m = key_setsadbxtype(sav->natt_type); 3590 break; 3591 3592 case SADB_X_EXT_NAT_T_DPORT: 3593 if (sav->natt_type == 0) 3594 continue; 3595 m = key_setsadbxport( 3596 key_portfromsaddr(&sav->sah->saidx.dst), 3597 SADB_X_EXT_NAT_T_DPORT); 3598 break; 3599 3600 case SADB_X_EXT_NAT_T_SPORT: 3601 if (sav->natt_type == 0) 3602 continue; 3603 m = key_setsadbxport( 3604 key_portfromsaddr(&sav->sah->saidx.src), 3605 SADB_X_EXT_NAT_T_SPORT); 3606 break; 3607 3608 case SADB_X_EXT_NAT_T_FRAG: 3609 /* don't send frag info if not set */ 3610 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3611 continue; 3612 m = key_setsadbxfrag(sav->esp_frag); 3613 break; 3614 3615 case SADB_X_EXT_NAT_T_OAI: 3616 case SADB_X_EXT_NAT_T_OAR: 3617 continue; 3618 3619 case SADB_EXT_ADDRESS_PROXY: 3620 case SADB_EXT_IDENTITY_SRC: 3621 case SADB_EXT_IDENTITY_DST: 3622 /* XXX: should we brought from SPD ? */ 3623 case SADB_EXT_SENSITIVITY: 3624 default: 3625 continue; 3626 } 3627 3628 KASSERT(!(m && p)); 3629 if (!m && !p) 3630 goto fail; 3631 if (p && tres) { 3632 M_PREPEND(tres, l, M_DONTWAIT); 3633 if (!tres) 3634 goto fail; 3635 memcpy(mtod(tres, void *), p, l); 3636 continue; 3637 } 3638 if (p) { 3639 m = key_alloc_mbuf(l); 3640 if (!m) 3641 goto fail; 3642 m_copyback(m, 0, l, p); 3643 } 3644 3645 if (tres) 3646 m_cat(m, tres); 3647 tres = m; 3648 } 3649 3650 m_cat(result, tres); 3651 tres = NULL; /* avoid free on error below */ 3652 3653 if (result->m_len < sizeof(struct sadb_msg)) { 3654 result = m_pullup(result, sizeof(struct sadb_msg)); 3655 if (result == NULL) 3656 goto fail; 3657 } 3658 3659 result->m_pkthdr.len = 0; 3660 for (m = result; m; m = m->m_next) 3661 result->m_pkthdr.len += m->m_len; 3662 3663 mtod(result, struct sadb_msg *)->sadb_msg_len = 3664 PFKEY_UNIT64(result->m_pkthdr.len); 3665 3666 return result; 3667 3668 fail: 3669 m_freem(result); 3670 m_freem(tres); 3671 return NULL; 3672 } 3673 3674 3675 /* 3676 * set a type in sadb_x_nat_t_type 3677 */ 3678 static struct mbuf * 3679 key_setsadbxtype(u_int16_t type) 3680 { 3681 struct mbuf *m; 3682 size_t len; 3683 struct sadb_x_nat_t_type *p; 3684 3685 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3686 3687 m = key_alloc_mbuf(len); 3688 if (!m || m->m_next) { /*XXX*/ 3689 if (m) 3690 m_freem(m); 3691 return NULL; 3692 } 3693 3694 p = mtod(m, struct sadb_x_nat_t_type *); 3695 3696 memset(p, 0, len); 3697 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3698 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3699 p->sadb_x_nat_t_type_type = type; 3700 3701 return m; 3702 } 3703 /* 3704 * set a port in sadb_x_nat_t_port. port is in network order 3705 */ 3706 static struct mbuf * 3707 key_setsadbxport(u_int16_t port, u_int16_t type) 3708 { 3709 struct mbuf *m; 3710 size_t len; 3711 struct sadb_x_nat_t_port *p; 3712 3713 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3714 3715 m = key_alloc_mbuf(len); 3716 if (!m || m->m_next) { /*XXX*/ 3717 if (m) 3718 m_freem(m); 3719 return NULL; 3720 } 3721 3722 p = mtod(m, struct sadb_x_nat_t_port *); 3723 3724 memset(p, 0, len); 3725 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3726 p->sadb_x_nat_t_port_exttype = type; 3727 p->sadb_x_nat_t_port_port = port; 3728 3729 return m; 3730 } 3731 3732 /* 3733 * set fragmentation info in sadb_x_nat_t_frag 3734 */ 3735 static struct mbuf * 3736 key_setsadbxfrag(u_int16_t flen) 3737 { 3738 struct mbuf *m; 3739 size_t len; 3740 struct sadb_x_nat_t_frag *p; 3741 3742 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3743 3744 m = key_alloc_mbuf(len); 3745 if (!m || m->m_next) { /*XXX*/ 3746 if (m) 3747 m_freem(m); 3748 return NULL; 3749 } 3750 3751 p = mtod(m, struct sadb_x_nat_t_frag *); 3752 3753 memset(p, 0, len); 3754 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3755 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3756 p->sadb_x_nat_t_frag_fraglen = flen; 3757 3758 return m; 3759 } 3760 3761 /* 3762 * Get port from sockaddr, port is in network order 3763 */ 3764 u_int16_t 3765 key_portfromsaddr(const union sockaddr_union *saddr) 3766 { 3767 u_int16_t port; 3768 3769 switch (saddr->sa.sa_family) { 3770 case AF_INET: { 3771 port = saddr->sin.sin_port; 3772 break; 3773 } 3774 #ifdef INET6 3775 case AF_INET6: { 3776 port = saddr->sin6.sin6_port; 3777 break; 3778 } 3779 #endif 3780 default: 3781 printf("%s: unexpected address family\n", __func__); 3782 port = 0; 3783 break; 3784 } 3785 3786 return port; 3787 } 3788 3789 3790 /* 3791 * Set port is struct sockaddr. port is in network order 3792 */ 3793 static void 3794 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3795 { 3796 switch (saddr->sa.sa_family) { 3797 case AF_INET: { 3798 saddr->sin.sin_port = port; 3799 break; 3800 } 3801 #ifdef INET6 3802 case AF_INET6: { 3803 saddr->sin6.sin6_port = port; 3804 break; 3805 } 3806 #endif 3807 default: 3808 printf("%s: unexpected address family %d\n", __func__, 3809 saddr->sa.sa_family); 3810 break; 3811 } 3812 3813 return; 3814 } 3815 3816 /* 3817 * Safety check sa_len 3818 */ 3819 static int 3820 key_checksalen(const union sockaddr_union *saddr) 3821 { 3822 switch (saddr->sa.sa_family) { 3823 case AF_INET: 3824 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3825 return -1; 3826 break; 3827 #ifdef INET6 3828 case AF_INET6: 3829 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3830 return -1; 3831 break; 3832 #endif 3833 default: 3834 printf("%s: unexpected sa_family %d\n", __func__, 3835 saddr->sa.sa_family); 3836 return -1; 3837 break; 3838 } 3839 return 0; 3840 } 3841 3842 3843 /* 3844 * set data into sadb_msg. 3845 */ 3846 static struct mbuf * 3847 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3848 u_int32_t seq, pid_t pid, u_int16_t reserved) 3849 { 3850 struct mbuf *m; 3851 struct sadb_msg *p; 3852 int len; 3853 3854 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3855 if (len > MCLBYTES) 3856 return NULL; 3857 MGETHDR(m, M_DONTWAIT, MT_DATA); 3858 if (m && len > MHLEN) { 3859 MCLGET(m, M_DONTWAIT); 3860 if ((m->m_flags & M_EXT) == 0) { 3861 m_freem(m); 3862 m = NULL; 3863 } 3864 } 3865 if (!m) 3866 return NULL; 3867 m->m_pkthdr.len = m->m_len = len; 3868 m->m_next = NULL; 3869 3870 p = mtod(m, struct sadb_msg *); 3871 3872 memset(p, 0, len); 3873 p->sadb_msg_version = PF_KEY_V2; 3874 p->sadb_msg_type = type; 3875 p->sadb_msg_errno = 0; 3876 p->sadb_msg_satype = satype; 3877 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3878 p->sadb_msg_reserved = reserved; 3879 p->sadb_msg_seq = seq; 3880 p->sadb_msg_pid = (u_int32_t)pid; 3881 3882 return m; 3883 } 3884 3885 /* 3886 * copy secasvar data into sadb_address. 3887 */ 3888 static struct mbuf * 3889 key_setsadbsa(struct secasvar *sav) 3890 { 3891 struct mbuf *m; 3892 struct sadb_sa *p; 3893 int len; 3894 3895 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3896 m = key_alloc_mbuf(len); 3897 if (!m || m->m_next) { /*XXX*/ 3898 if (m) 3899 m_freem(m); 3900 return NULL; 3901 } 3902 3903 p = mtod(m, struct sadb_sa *); 3904 3905 memset(p, 0, len); 3906 p->sadb_sa_len = PFKEY_UNIT64(len); 3907 p->sadb_sa_exttype = SADB_EXT_SA; 3908 p->sadb_sa_spi = sav->spi; 3909 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3910 p->sadb_sa_state = sav->state; 3911 p->sadb_sa_auth = sav->alg_auth; 3912 p->sadb_sa_encrypt = sav->alg_enc; 3913 p->sadb_sa_flags = sav->flags; 3914 3915 return m; 3916 } 3917 3918 /* 3919 * set data into sadb_address. 3920 */ 3921 static struct mbuf * 3922 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3923 u_int8_t prefixlen, u_int16_t ul_proto) 3924 { 3925 struct mbuf *m; 3926 struct sadb_address *p; 3927 size_t len; 3928 3929 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3930 PFKEY_ALIGN8(saddr->sa_len); 3931 m = key_alloc_mbuf(len); 3932 if (!m || m->m_next) { /*XXX*/ 3933 if (m) 3934 m_freem(m); 3935 return NULL; 3936 } 3937 3938 p = mtod(m, struct sadb_address *); 3939 3940 memset(p, 0, len); 3941 p->sadb_address_len = PFKEY_UNIT64(len); 3942 p->sadb_address_exttype = exttype; 3943 p->sadb_address_proto = ul_proto; 3944 if (prefixlen == FULLMASK) { 3945 switch (saddr->sa_family) { 3946 case AF_INET: 3947 prefixlen = sizeof(struct in_addr) << 3; 3948 break; 3949 case AF_INET6: 3950 prefixlen = sizeof(struct in6_addr) << 3; 3951 break; 3952 default: 3953 ; /*XXX*/ 3954 } 3955 } 3956 p->sadb_address_prefixlen = prefixlen; 3957 p->sadb_address_reserved = 0; 3958 3959 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3960 saddr, saddr->sa_len); 3961 3962 return m; 3963 } 3964 3965 #if 0 3966 /* 3967 * set data into sadb_ident. 3968 */ 3969 static struct mbuf * 3970 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3971 void *string, int stringlen, u_int64_t id) 3972 { 3973 struct mbuf *m; 3974 struct sadb_ident *p; 3975 size_t len; 3976 3977 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3978 m = key_alloc_mbuf(len); 3979 if (!m || m->m_next) { /*XXX*/ 3980 if (m) 3981 m_freem(m); 3982 return NULL; 3983 } 3984 3985 p = mtod(m, struct sadb_ident *); 3986 3987 memset(p, 0, len); 3988 p->sadb_ident_len = PFKEY_UNIT64(len); 3989 p->sadb_ident_exttype = exttype; 3990 p->sadb_ident_type = idtype; 3991 p->sadb_ident_reserved = 0; 3992 p->sadb_ident_id = id; 3993 3994 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3995 string, stringlen); 3996 3997 return m; 3998 } 3999 #endif 4000 4001 /* 4002 * set data into sadb_x_sa2. 4003 */ 4004 static struct mbuf * 4005 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 4006 { 4007 struct mbuf *m; 4008 struct sadb_x_sa2 *p; 4009 size_t len; 4010 4011 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4012 m = key_alloc_mbuf(len); 4013 if (!m || m->m_next) { /*XXX*/ 4014 if (m) 4015 m_freem(m); 4016 return NULL; 4017 } 4018 4019 p = mtod(m, struct sadb_x_sa2 *); 4020 4021 memset(p, 0, len); 4022 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4023 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4024 p->sadb_x_sa2_mode = mode; 4025 p->sadb_x_sa2_reserved1 = 0; 4026 p->sadb_x_sa2_reserved2 = 0; 4027 p->sadb_x_sa2_sequence = seq; 4028 p->sadb_x_sa2_reqid = reqid; 4029 4030 return m; 4031 } 4032 4033 /* 4034 * set data into sadb_x_policy 4035 */ 4036 static struct mbuf * 4037 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 4038 { 4039 struct mbuf *m; 4040 struct sadb_x_policy *p; 4041 size_t len; 4042 4043 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4044 m = key_alloc_mbuf(len); 4045 if (!m || m->m_next) { /*XXX*/ 4046 if (m) 4047 m_freem(m); 4048 return NULL; 4049 } 4050 4051 p = mtod(m, struct sadb_x_policy *); 4052 4053 memset(p, 0, len); 4054 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4055 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4056 p->sadb_x_policy_type = type; 4057 p->sadb_x_policy_dir = dir; 4058 p->sadb_x_policy_id = id; 4059 4060 return m; 4061 } 4062 4063 /* %%% utilities */ 4064 /* 4065 * copy a buffer into the new buffer allocated. 4066 */ 4067 static void * 4068 key_newbuf(const void *src, u_int len) 4069 { 4070 void *new; 4071 4072 KMALLOC(new, void *, len); 4073 if (new == NULL) { 4074 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 4075 return NULL; 4076 } 4077 memcpy(new, src, len); 4078 4079 return new; 4080 } 4081 4082 /* compare my own address 4083 * OUT: 1: true, i.e. my address. 4084 * 0: false 4085 */ 4086 int 4087 key_ismyaddr(const struct sockaddr *sa) 4088 { 4089 #ifdef INET 4090 const struct sockaddr_in *sin; 4091 const struct in_ifaddr *ia; 4092 #endif 4093 4094 /* sanity check */ 4095 if (sa == NULL) 4096 panic("key_ismyaddr: NULL pointer is passed"); 4097 4098 switch (sa->sa_family) { 4099 #ifdef INET 4100 case AF_INET: 4101 sin = (const struct sockaddr_in *)sa; 4102 for (ia = in_ifaddrhead.tqh_first; ia; 4103 ia = ia->ia_link.tqe_next) 4104 { 4105 if (sin->sin_family == ia->ia_addr.sin_family && 4106 sin->sin_len == ia->ia_addr.sin_len && 4107 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4108 { 4109 return 1; 4110 } 4111 } 4112 break; 4113 #endif 4114 #ifdef INET6 4115 case AF_INET6: 4116 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4117 #endif 4118 } 4119 4120 return 0; 4121 } 4122 4123 #ifdef INET6 4124 /* 4125 * compare my own address for IPv6. 4126 * 1: ours 4127 * 0: other 4128 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4129 */ 4130 #include <netinet6/in6_var.h> 4131 4132 static int 4133 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4134 { 4135 const struct in6_ifaddr *ia; 4136 const struct in6_multi *in6m; 4137 4138 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 4139 if (key_sockaddrcmp((const struct sockaddr *)&sin6, 4140 (const struct sockaddr *)&ia->ia_addr, 0) == 0) 4141 return 1; 4142 4143 /* 4144 * XXX Multicast 4145 * XXX why do we care about multlicast here while we don't care 4146 * about IPv4 multicast?? 4147 * XXX scope 4148 */ 4149 in6m = NULL; 4150 #ifdef __FreeBSD__ 4151 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 4152 #else 4153 for ((in6m) = ia->ia6_multiaddrs.lh_first; 4154 (in6m) != NULL && 4155 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); 4156 (in6m) = in6m->in6m_entry.le_next) 4157 continue; 4158 #endif 4159 if (in6m) 4160 return 1; 4161 } 4162 4163 /* loopback, just for safety */ 4164 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4165 return 1; 4166 4167 return 0; 4168 } 4169 #endif /*INET6*/ 4170 4171 /* 4172 * compare two secasindex structure. 4173 * flag can specify to compare 2 saidxes. 4174 * compare two secasindex structure without both mode and reqid. 4175 * don't compare port. 4176 * IN: 4177 * saidx0: source, it can be in SAD. 4178 * saidx1: object. 4179 * OUT: 4180 * 1 : equal 4181 * 0 : not equal 4182 */ 4183 static int 4184 key_cmpsaidx( 4185 const struct secasindex *saidx0, 4186 const struct secasindex *saidx1, 4187 int flag) 4188 { 4189 int chkport = 0; 4190 4191 /* sanity */ 4192 if (saidx0 == NULL && saidx1 == NULL) 4193 return 1; 4194 4195 if (saidx0 == NULL || saidx1 == NULL) 4196 return 0; 4197 4198 if (saidx0->proto != saidx1->proto) 4199 return 0; 4200 4201 if (flag == CMP_EXACTLY) { 4202 if (saidx0->mode != saidx1->mode) 4203 return 0; 4204 if (saidx0->reqid != saidx1->reqid) 4205 return 0; 4206 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4207 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4208 return 0; 4209 } else { 4210 4211 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4212 if (flag == CMP_MODE_REQID 4213 ||flag == CMP_REQID) { 4214 /* 4215 * If reqid of SPD is non-zero, unique SA is required. 4216 * The result must be of same reqid in this case. 4217 */ 4218 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4219 return 0; 4220 } 4221 4222 if (flag == CMP_MODE_REQID) { 4223 if (saidx0->mode != IPSEC_MODE_ANY 4224 && saidx0->mode != saidx1->mode) 4225 return 0; 4226 } 4227 4228 /* 4229 * If NAT-T is enabled, check ports for tunnel mode. 4230 * Don't do it for transport mode, as there is no 4231 * port information available in the SP. 4232 * Also don't check ports if they are set to zero 4233 * in the SPD: This means we have a non-generated 4234 * SPD which can't know UDP ports. 4235 */ 4236 if (saidx1->mode == IPSEC_MODE_TUNNEL && 4237 ((((const struct sockaddr *)(&saidx1->src))->sa_family == AF_INET && 4238 ((const struct sockaddr *)(&saidx1->dst))->sa_family == AF_INET && 4239 ((const struct sockaddr_in *)(&saidx1->src))->sin_port && 4240 ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) || 4241 (((const struct sockaddr *)(&saidx1->src))->sa_family == AF_INET6 && 4242 ((const struct sockaddr *)(&saidx1->dst))->sa_family == AF_INET6 && 4243 ((const struct sockaddr_in6 *)(&saidx1->src))->sin6_port && 4244 ((const struct sockaddr_in6 *)(&saidx1->dst))->sin6_port))) 4245 chkport = 1; 4246 4247 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4248 return 0; 4249 } 4250 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4251 return 0; 4252 } 4253 } 4254 4255 return 1; 4256 } 4257 4258 /* 4259 * compare two secindex structure exactly. 4260 * IN: 4261 * spidx0: source, it is often in SPD. 4262 * spidx1: object, it is often from PFKEY message. 4263 * OUT: 4264 * 1 : equal 4265 * 0 : not equal 4266 */ 4267 int 4268 key_cmpspidx_exactly( 4269 const struct secpolicyindex *spidx0, 4270 const struct secpolicyindex *spidx1) 4271 { 4272 /* sanity */ 4273 if (spidx0 == NULL && spidx1 == NULL) 4274 return 1; 4275 4276 if (spidx0 == NULL || spidx1 == NULL) 4277 return 0; 4278 4279 if (spidx0->prefs != spidx1->prefs 4280 || spidx0->prefd != spidx1->prefd 4281 || spidx0->ul_proto != spidx1->ul_proto) 4282 return 0; 4283 4284 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4285 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4286 } 4287 4288 /* 4289 * compare two secindex structure with mask. 4290 * IN: 4291 * spidx0: source, it is often in SPD. 4292 * spidx1: object, it is often from IP header. 4293 * OUT: 4294 * 1 : equal 4295 * 0 : not equal 4296 */ 4297 int 4298 key_cmpspidx_withmask( 4299 const struct secpolicyindex *spidx0, 4300 const struct secpolicyindex *spidx1) 4301 { 4302 /* sanity */ 4303 if (spidx0 == NULL && spidx1 == NULL) 4304 return 1; 4305 4306 if (spidx0 == NULL || spidx1 == NULL) 4307 return 0; 4308 4309 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4310 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4311 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4312 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4313 return 0; 4314 4315 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4316 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4317 && spidx0->ul_proto != spidx1->ul_proto) 4318 return 0; 4319 4320 switch (spidx0->src.sa.sa_family) { 4321 case AF_INET: 4322 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4323 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4324 return 0; 4325 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4326 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4327 return 0; 4328 break; 4329 case AF_INET6: 4330 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4331 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4332 return 0; 4333 /* 4334 * scope_id check. if sin6_scope_id is 0, we regard it 4335 * as a wildcard scope, which matches any scope zone ID. 4336 */ 4337 if (spidx0->src.sin6.sin6_scope_id && 4338 spidx1->src.sin6.sin6_scope_id && 4339 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4340 return 0; 4341 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4342 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4343 return 0; 4344 break; 4345 default: 4346 /* XXX */ 4347 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4348 return 0; 4349 break; 4350 } 4351 4352 switch (spidx0->dst.sa.sa_family) { 4353 case AF_INET: 4354 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4355 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4356 return 0; 4357 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4358 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4359 return 0; 4360 break; 4361 case AF_INET6: 4362 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4363 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4364 return 0; 4365 /* 4366 * scope_id check. if sin6_scope_id is 0, we regard it 4367 * as a wildcard scope, which matches any scope zone ID. 4368 */ 4369 if (spidx0->src.sin6.sin6_scope_id && 4370 spidx1->src.sin6.sin6_scope_id && 4371 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4372 return 0; 4373 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4374 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4375 return 0; 4376 break; 4377 default: 4378 /* XXX */ 4379 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4380 return 0; 4381 break; 4382 } 4383 4384 /* XXX Do we check other field ? e.g. flowinfo */ 4385 4386 return 1; 4387 } 4388 4389 /* returns 0 on match */ 4390 static int 4391 key_sockaddrcmp( 4392 const struct sockaddr *sa1, 4393 const struct sockaddr *sa2, 4394 int port) 4395 { 4396 #ifdef satosin 4397 #undef satosin 4398 #endif 4399 #define satosin(s) ((const struct sockaddr_in *)s) 4400 #ifdef satosin6 4401 #undef satosin6 4402 #endif 4403 #define satosin6(s) ((const struct sockaddr_in6 *)s) 4404 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4405 return 1; 4406 4407 switch (sa1->sa_family) { 4408 case AF_INET: 4409 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4410 return 1; 4411 if (satosin(sa1)->sin_addr.s_addr != 4412 satosin(sa2)->sin_addr.s_addr) { 4413 return 1; 4414 } 4415 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4416 return 1; 4417 break; 4418 case AF_INET6: 4419 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4420 return 1; /*EINVAL*/ 4421 if (satosin6(sa1)->sin6_scope_id != 4422 satosin6(sa2)->sin6_scope_id) { 4423 return 1; 4424 } 4425 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4426 &satosin6(sa2)->sin6_addr)) { 4427 return 1; 4428 } 4429 if (port && 4430 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4431 return 1; 4432 } 4433 break; 4434 default: 4435 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4436 return 1; 4437 break; 4438 } 4439 4440 return 0; 4441 #undef satosin 4442 #undef satosin6 4443 } 4444 4445 /* 4446 * compare two buffers with mask. 4447 * IN: 4448 * addr1: source 4449 * addr2: object 4450 * bits: Number of bits to compare 4451 * OUT: 4452 * 1 : equal 4453 * 0 : not equal 4454 */ 4455 static int 4456 key_bbcmp(const void *a1, const void *a2, u_int bits) 4457 { 4458 const unsigned char *p1 = a1; 4459 const unsigned char *p2 = a2; 4460 4461 /* XXX: This could be considerably faster if we compare a word 4462 * at a time, but it is complicated on LSB Endian machines */ 4463 4464 /* Handle null pointers */ 4465 if (p1 == NULL || p2 == NULL) 4466 return (p1 == p2); 4467 4468 while (bits >= 8) { 4469 if (*p1++ != *p2++) 4470 return 0; 4471 bits -= 8; 4472 } 4473 4474 if (bits > 0) { 4475 u_int8_t mask = ~((1<<(8-bits))-1); 4476 if ((*p1 & mask) != (*p2 & mask)) 4477 return 0; 4478 } 4479 return 1; /* Match! */ 4480 } 4481 4482 /* 4483 * time handler. 4484 * scanning SPD and SAD to check status for each entries, 4485 * and do to remove or to expire. 4486 */ 4487 void 4488 key_timehandler(void* arg) 4489 { 4490 u_int dir; 4491 int s; 4492 time_t now = time_uptime; 4493 4494 s = splsoftnet(); /*called from softclock()*/ 4495 mutex_enter(softnet_lock); 4496 4497 /* SPD */ 4498 { 4499 struct secpolicy *sp, *nextsp; 4500 4501 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4502 for (sp = LIST_FIRST(&sptree[dir]); 4503 sp != NULL; 4504 sp = nextsp) { 4505 4506 nextsp = LIST_NEXT(sp, chain); 4507 4508 if (sp->state == IPSEC_SPSTATE_DEAD) { 4509 key_sp_unlink(sp); /*XXX*/ 4510 4511 /* 'sp' dead; continue transfers to 4512 * 'sp = nextsp' 4513 */ 4514 continue; 4515 } 4516 4517 if (sp->lifetime == 0 && sp->validtime == 0) 4518 continue; 4519 4520 /* the deletion will occur next time */ 4521 if ((sp->lifetime && now - sp->created > sp->lifetime) 4522 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4523 key_sp_dead(sp); 4524 key_spdexpire(sp); 4525 continue; 4526 } 4527 } 4528 } 4529 } 4530 4531 /* SAD */ 4532 { 4533 struct secashead *sah, *nextsah; 4534 struct secasvar *sav, *nextsav; 4535 4536 for (sah = LIST_FIRST(&sahtree); 4537 sah != NULL; 4538 sah = nextsah) { 4539 4540 nextsah = LIST_NEXT(sah, chain); 4541 4542 /* if sah has been dead, then delete it and process next sah. */ 4543 if (sah->state == SADB_SASTATE_DEAD) { 4544 key_delsah(sah); 4545 continue; 4546 } 4547 4548 /* if LARVAL entry doesn't become MATURE, delete it. */ 4549 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4550 sav != NULL; 4551 sav = nextsav) { 4552 4553 nextsav = LIST_NEXT(sav, chain); 4554 4555 if (now - sav->created > key_larval_lifetime) { 4556 KEY_FREESAV(&sav); 4557 } 4558 } 4559 4560 /* 4561 * check MATURE entry to start to send expire message 4562 * whether or not. 4563 */ 4564 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4565 sav != NULL; 4566 sav = nextsav) { 4567 4568 nextsav = LIST_NEXT(sav, chain); 4569 4570 /* we don't need to check. */ 4571 if (sav->lft_s == NULL) 4572 continue; 4573 4574 /* sanity check */ 4575 if (sav->lft_c == NULL) { 4576 ipseclog((LOG_DEBUG,"key_timehandler: " 4577 "There is no CURRENT time, why?\n")); 4578 continue; 4579 } 4580 4581 /* check SOFT lifetime */ 4582 if (sav->lft_s->sadb_lifetime_addtime != 0 4583 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4584 /* 4585 * check SA to be used whether or not. 4586 * when SA hasn't been used, delete it. 4587 */ 4588 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4589 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4590 KEY_FREESAV(&sav); 4591 } else { 4592 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4593 /* 4594 * XXX If we keep to send expire 4595 * message in the status of 4596 * DYING. Do remove below code. 4597 */ 4598 key_expire(sav); 4599 } 4600 } 4601 /* check SOFT lifetime by bytes */ 4602 /* 4603 * XXX I don't know the way to delete this SA 4604 * when new SA is installed. Caution when it's 4605 * installed too big lifetime by time. 4606 */ 4607 else if (sav->lft_s->sadb_lifetime_bytes != 0 4608 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4609 4610 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4611 /* 4612 * XXX If we keep to send expire 4613 * message in the status of 4614 * DYING. Do remove below code. 4615 */ 4616 key_expire(sav); 4617 } 4618 } 4619 4620 /* check DYING entry to change status to DEAD. */ 4621 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4622 sav != NULL; 4623 sav = nextsav) { 4624 4625 nextsav = LIST_NEXT(sav, chain); 4626 4627 /* we don't need to check. */ 4628 if (sav->lft_h == NULL) 4629 continue; 4630 4631 /* sanity check */ 4632 if (sav->lft_c == NULL) { 4633 ipseclog((LOG_DEBUG, "key_timehandler: " 4634 "There is no CURRENT time, why?\n")); 4635 continue; 4636 } 4637 4638 if (sav->lft_h->sadb_lifetime_addtime != 0 4639 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4640 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4641 KEY_FREESAV(&sav); 4642 } 4643 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4644 else if (sav->lft_s != NULL 4645 && sav->lft_s->sadb_lifetime_addtime != 0 4646 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4647 /* 4648 * XXX: should be checked to be 4649 * installed the valid SA. 4650 */ 4651 4652 /* 4653 * If there is no SA then sending 4654 * expire message. 4655 */ 4656 key_expire(sav); 4657 } 4658 #endif 4659 /* check HARD lifetime by bytes */ 4660 else if (sav->lft_h->sadb_lifetime_bytes != 0 4661 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4662 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4663 KEY_FREESAV(&sav); 4664 } 4665 } 4666 4667 /* delete entry in DEAD */ 4668 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4669 sav != NULL; 4670 sav = nextsav) { 4671 4672 nextsav = LIST_NEXT(sav, chain); 4673 4674 /* sanity check */ 4675 if (sav->state != SADB_SASTATE_DEAD) { 4676 ipseclog((LOG_DEBUG, "key_timehandler: " 4677 "invalid sav->state " 4678 "(queue: %d SA: %d): " 4679 "kill it anyway\n", 4680 SADB_SASTATE_DEAD, sav->state)); 4681 } 4682 4683 /* 4684 * do not call key_freesav() here. 4685 * sav should already be freed, and sav->refcnt 4686 * shows other references to sav 4687 * (such as from SPD). 4688 */ 4689 } 4690 } 4691 } 4692 4693 #ifndef IPSEC_NONBLOCK_ACQUIRE 4694 /* ACQ tree */ 4695 { 4696 struct secacq *acq, *nextacq; 4697 4698 for (acq = LIST_FIRST(&acqtree); 4699 acq != NULL; 4700 acq = nextacq) { 4701 4702 nextacq = LIST_NEXT(acq, chain); 4703 4704 if (now - acq->created > key_blockacq_lifetime 4705 && __LIST_CHAINED(acq)) { 4706 LIST_REMOVE(acq, chain); 4707 KFREE(acq); 4708 } 4709 } 4710 } 4711 #endif 4712 4713 /* SP ACQ tree */ 4714 { 4715 struct secspacq *acq, *nextacq; 4716 4717 for (acq = LIST_FIRST(&spacqtree); 4718 acq != NULL; 4719 acq = nextacq) { 4720 4721 nextacq = LIST_NEXT(acq, chain); 4722 4723 if (now - acq->created > key_blockacq_lifetime 4724 && __LIST_CHAINED(acq)) { 4725 LIST_REMOVE(acq, chain); 4726 KFREE(acq); 4727 } 4728 } 4729 } 4730 4731 #ifndef IPSEC_DEBUG2 4732 /* do exchange to tick time !! */ 4733 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4734 #endif /* IPSEC_DEBUG2 */ 4735 4736 mutex_exit(softnet_lock); 4737 splx(s); 4738 return; 4739 } 4740 4741 u_long 4742 key_random(void) 4743 { 4744 u_long value; 4745 4746 key_randomfill(&value, sizeof(value)); 4747 return value; 4748 } 4749 4750 void 4751 key_randomfill(void *p, size_t l) 4752 { 4753 4754 cprng_fast(p, l); 4755 } 4756 4757 /* 4758 * map SADB_SATYPE_* to IPPROTO_*. 4759 * if satype == SADB_SATYPE then satype is mapped to ~0. 4760 * OUT: 4761 * 0: invalid satype. 4762 */ 4763 static u_int16_t 4764 key_satype2proto(u_int8_t satype) 4765 { 4766 switch (satype) { 4767 case SADB_SATYPE_UNSPEC: 4768 return IPSEC_PROTO_ANY; 4769 case SADB_SATYPE_AH: 4770 return IPPROTO_AH; 4771 case SADB_SATYPE_ESP: 4772 return IPPROTO_ESP; 4773 case SADB_X_SATYPE_IPCOMP: 4774 return IPPROTO_IPCOMP; 4775 case SADB_X_SATYPE_TCPSIGNATURE: 4776 return IPPROTO_TCP; 4777 default: 4778 return 0; 4779 } 4780 /* NOTREACHED */ 4781 } 4782 4783 /* 4784 * map IPPROTO_* to SADB_SATYPE_* 4785 * OUT: 4786 * 0: invalid protocol type. 4787 */ 4788 static u_int8_t 4789 key_proto2satype(u_int16_t proto) 4790 { 4791 switch (proto) { 4792 case IPPROTO_AH: 4793 return SADB_SATYPE_AH; 4794 case IPPROTO_ESP: 4795 return SADB_SATYPE_ESP; 4796 case IPPROTO_IPCOMP: 4797 return SADB_X_SATYPE_IPCOMP; 4798 case IPPROTO_TCP: 4799 return SADB_X_SATYPE_TCPSIGNATURE; 4800 default: 4801 return 0; 4802 } 4803 /* NOTREACHED */ 4804 } 4805 4806 static int 4807 key_setsecasidx(int proto, int mode, int reqid, 4808 const struct sadb_address * src, 4809 const struct sadb_address * dst, 4810 struct secasindex * saidx) 4811 { 4812 const union sockaddr_union * src_u = 4813 (const union sockaddr_union *) src; 4814 const union sockaddr_union * dst_u = 4815 (const union sockaddr_union *) dst; 4816 4817 /* sa len safety check */ 4818 if (key_checksalen(src_u) != 0) 4819 return -1; 4820 if (key_checksalen(dst_u) != 0) 4821 return -1; 4822 4823 memset(saidx, 0, sizeof(*saidx)); 4824 saidx->proto = proto; 4825 saidx->mode = mode; 4826 saidx->reqid = reqid; 4827 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4828 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4829 4830 key_porttosaddr(&((saidx)->src),0); 4831 key_porttosaddr(&((saidx)->dst),0); 4832 return 0; 4833 } 4834 4835 /* %%% PF_KEY */ 4836 /* 4837 * SADB_GETSPI processing is to receive 4838 * <base, (SA2), src address, dst address, (SPI range)> 4839 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4840 * tree with the status of LARVAL, and send 4841 * <base, SA(*), address(SD)> 4842 * to the IKMPd. 4843 * 4844 * IN: mhp: pointer to the pointer to each header. 4845 * OUT: NULL if fail. 4846 * other if success, return pointer to the message to send. 4847 */ 4848 static int 4849 key_getspi(struct socket *so, struct mbuf *m, 4850 const struct sadb_msghdr *mhp) 4851 { 4852 struct sadb_address *src0, *dst0; 4853 struct secasindex saidx; 4854 struct secashead *newsah; 4855 struct secasvar *newsav; 4856 u_int8_t proto; 4857 u_int32_t spi; 4858 u_int8_t mode; 4859 u_int16_t reqid; 4860 int error; 4861 4862 /* sanity check */ 4863 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4864 panic("key_getspi: NULL pointer is passed"); 4865 4866 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4867 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4868 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4869 return key_senderror(so, m, EINVAL); 4870 } 4871 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4872 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4873 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4874 return key_senderror(so, m, EINVAL); 4875 } 4876 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4877 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4878 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4879 } else { 4880 mode = IPSEC_MODE_ANY; 4881 reqid = 0; 4882 } 4883 4884 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4885 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4886 4887 /* map satype to proto */ 4888 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4889 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4890 return key_senderror(so, m, EINVAL); 4891 } 4892 4893 4894 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 4895 dst0 + 1, &saidx)) != 0) 4896 return key_senderror(so, m, EINVAL); 4897 4898 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 4899 return key_senderror(so, m, EINVAL); 4900 4901 /* SPI allocation */ 4902 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4903 &saidx); 4904 if (spi == 0) 4905 return key_senderror(so, m, EINVAL); 4906 4907 /* get a SA index */ 4908 if ((newsah = key_getsah(&saidx)) == NULL) { 4909 /* create a new SA index */ 4910 if ((newsah = key_newsah(&saidx)) == NULL) { 4911 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4912 return key_senderror(so, m, ENOBUFS); 4913 } 4914 } 4915 4916 /* get a new SA */ 4917 /* XXX rewrite */ 4918 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4919 if (newsav == NULL) { 4920 /* XXX don't free new SA index allocated in above. */ 4921 return key_senderror(so, m, error); 4922 } 4923 4924 /* set spi */ 4925 newsav->spi = htonl(spi); 4926 4927 #ifndef IPSEC_NONBLOCK_ACQUIRE 4928 /* delete the entry in acqtree */ 4929 if (mhp->msg->sadb_msg_seq != 0) { 4930 struct secacq *acq; 4931 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4932 /* reset counter in order to deletion by timehandler. */ 4933 acq->created = time_uptime; 4934 acq->count = 0; 4935 } 4936 } 4937 #endif 4938 4939 { 4940 struct mbuf *n, *nn; 4941 struct sadb_sa *m_sa; 4942 struct sadb_msg *newmsg; 4943 int off, len; 4944 4945 /* create new sadb_msg to reply. */ 4946 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4947 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4948 if (len > MCLBYTES) 4949 return key_senderror(so, m, ENOBUFS); 4950 4951 MGETHDR(n, M_DONTWAIT, MT_DATA); 4952 if (len > MHLEN) { 4953 MCLGET(n, M_DONTWAIT); 4954 if ((n->m_flags & M_EXT) == 0) { 4955 m_freem(n); 4956 n = NULL; 4957 } 4958 } 4959 if (!n) 4960 return key_senderror(so, m, ENOBUFS); 4961 4962 n->m_len = len; 4963 n->m_next = NULL; 4964 off = 0; 4965 4966 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4967 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4968 4969 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4970 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4971 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4972 m_sa->sadb_sa_spi = htonl(spi); 4973 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4974 4975 #ifdef DIAGNOSTIC 4976 if (off != len) 4977 panic("length inconsistency in key_getspi"); 4978 #endif 4979 4980 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4981 SADB_EXT_ADDRESS_DST); 4982 if (!n->m_next) { 4983 m_freem(n); 4984 return key_senderror(so, m, ENOBUFS); 4985 } 4986 4987 if (n->m_len < sizeof(struct sadb_msg)) { 4988 n = m_pullup(n, sizeof(struct sadb_msg)); 4989 if (n == NULL) 4990 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4991 } 4992 4993 n->m_pkthdr.len = 0; 4994 for (nn = n; nn; nn = nn->m_next) 4995 n->m_pkthdr.len += nn->m_len; 4996 4997 newmsg = mtod(n, struct sadb_msg *); 4998 newmsg->sadb_msg_seq = newsav->seq; 4999 newmsg->sadb_msg_errno = 0; 5000 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5001 5002 m_freem(m); 5003 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5004 } 5005 } 5006 5007 /* 5008 * allocating new SPI 5009 * called by key_getspi(). 5010 * OUT: 5011 * 0: failure. 5012 * others: success. 5013 */ 5014 static u_int32_t 5015 key_do_getnewspi(const struct sadb_spirange *spirange, 5016 const struct secasindex *saidx) 5017 { 5018 u_int32_t newspi; 5019 u_int32_t spmin, spmax; 5020 int count = key_spi_trycnt; 5021 5022 /* set spi range to allocate */ 5023 if (spirange != NULL) { 5024 spmin = spirange->sadb_spirange_min; 5025 spmax = spirange->sadb_spirange_max; 5026 } else { 5027 spmin = key_spi_minval; 5028 spmax = key_spi_maxval; 5029 } 5030 /* IPCOMP needs 2-byte SPI */ 5031 if (saidx->proto == IPPROTO_IPCOMP) { 5032 u_int32_t t; 5033 if (spmin >= 0x10000) 5034 spmin = 0xffff; 5035 if (spmax >= 0x10000) 5036 spmax = 0xffff; 5037 if (spmin > spmax) { 5038 t = spmin; spmin = spmax; spmax = t; 5039 } 5040 } 5041 5042 if (spmin == spmax) { 5043 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5044 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 5045 return 0; 5046 } 5047 5048 count--; /* taking one cost. */ 5049 newspi = spmin; 5050 5051 } else { 5052 5053 /* init SPI */ 5054 newspi = 0; 5055 5056 /* when requesting to allocate spi ranged */ 5057 while (count--) { 5058 /* generate pseudo-random SPI value ranged. */ 5059 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5060 5061 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5062 break; 5063 } 5064 5065 if (count == 0 || newspi == 0) { 5066 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 5067 return 0; 5068 } 5069 } 5070 5071 /* statistics */ 5072 keystat.getspi_count = 5073 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5074 5075 return newspi; 5076 } 5077 5078 static int 5079 key_handle_natt_info(struct secasvar *sav, 5080 const struct sadb_msghdr *mhp) 5081 { 5082 5083 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5084 ipseclog((LOG_DEBUG,"update: NAT-T OAi present\n")); 5085 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5086 ipseclog((LOG_DEBUG,"update: NAT-T OAr present\n")); 5087 5088 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5089 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5090 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5091 struct sadb_x_nat_t_type *type; 5092 struct sadb_x_nat_t_port *sport; 5093 struct sadb_x_nat_t_port *dport; 5094 struct sadb_address *iaddr, *raddr; 5095 struct sadb_x_nat_t_frag *frag; 5096 5097 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5098 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5099 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5100 ipseclog((LOG_DEBUG, "key_update: " 5101 "invalid message.\n")); 5102 return -1; 5103 } 5104 5105 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 5106 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 5107 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5108 return -1; 5109 } 5110 5111 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 5112 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 5113 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5114 return -1; 5115 } 5116 5117 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 5118 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 5119 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5120 return -1; 5121 } 5122 5123 type = (struct sadb_x_nat_t_type *) 5124 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5125 sport = (struct sadb_x_nat_t_port *) 5126 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5127 dport = (struct sadb_x_nat_t_port *) 5128 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5129 iaddr = (struct sadb_address *) 5130 mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5131 raddr = (struct sadb_address *) 5132 mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5133 frag = (struct sadb_x_nat_t_frag *) 5134 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5135 5136 ipseclog((LOG_DEBUG, 5137 "key_update: type %d, sport = %d, dport = %d\n", 5138 type->sadb_x_nat_t_type_type, 5139 sport->sadb_x_nat_t_port_port, 5140 dport->sadb_x_nat_t_port_port)); 5141 5142 if (type) 5143 sav->natt_type = type->sadb_x_nat_t_type_type; 5144 if (sport) 5145 key_porttosaddr(&sav->sah->saidx.src, 5146 sport->sadb_x_nat_t_port_port); 5147 if (dport) 5148 key_porttosaddr(&sav->sah->saidx.dst, 5149 dport->sadb_x_nat_t_port_port); 5150 if (frag) 5151 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5152 else 5153 sav->esp_frag = IP_MAXPACKET; 5154 } 5155 5156 return 0; 5157 } 5158 5159 /* Just update the IPSEC_NAT_T ports if present */ 5160 static int 5161 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5162 const struct sadb_msghdr *mhp) 5163 { 5164 5165 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5166 ipseclog((LOG_DEBUG,"update: NAT-T OAi present\n")); 5167 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5168 ipseclog((LOG_DEBUG,"update: NAT-T OAr present\n")); 5169 5170 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5171 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5172 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5173 struct sadb_x_nat_t_type *type; 5174 struct sadb_x_nat_t_port *sport; 5175 struct sadb_x_nat_t_port *dport; 5176 5177 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5178 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5179 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5180 ipseclog((LOG_DEBUG, "key_update: " 5181 "invalid message.\n")); 5182 return -1; 5183 } 5184 5185 sport = (struct sadb_x_nat_t_port *) 5186 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5187 dport = (struct sadb_x_nat_t_port *) 5188 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5189 5190 if (sport) 5191 key_porttosaddr(src, 5192 sport->sadb_x_nat_t_port_port); 5193 if (dport) 5194 key_porttosaddr(dst, 5195 dport->sadb_x_nat_t_port_port); 5196 } 5197 5198 return 0; 5199 } 5200 5201 5202 /* 5203 * SADB_UPDATE processing 5204 * receive 5205 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5206 * key(AE), (identity(SD),) (sensitivity)> 5207 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5208 * and send 5209 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5210 * (identity(SD),) (sensitivity)> 5211 * to the ikmpd. 5212 * 5213 * m will always be freed. 5214 */ 5215 static int 5216 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5217 { 5218 struct sadb_sa *sa0; 5219 struct sadb_address *src0, *dst0; 5220 struct secasindex saidx; 5221 struct secashead *sah; 5222 struct secasvar *sav; 5223 u_int16_t proto; 5224 u_int8_t mode; 5225 u_int16_t reqid; 5226 int error; 5227 5228 /* sanity check */ 5229 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5230 panic("key_update: NULL pointer is passed"); 5231 5232 /* map satype to proto */ 5233 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5234 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 5235 return key_senderror(so, m, EINVAL); 5236 } 5237 5238 if (mhp->ext[SADB_EXT_SA] == NULL || 5239 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5240 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5241 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5242 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5243 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5244 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5245 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5246 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5247 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5248 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5249 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5250 return key_senderror(so, m, EINVAL); 5251 } 5252 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5253 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5254 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5255 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5256 return key_senderror(so, m, EINVAL); 5257 } 5258 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5259 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5260 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5261 } else { 5262 mode = IPSEC_MODE_ANY; 5263 reqid = 0; 5264 } 5265 /* XXX boundary checking for other extensions */ 5266 5267 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5268 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5269 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5270 5271 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5272 dst0 + 1, &saidx)) != 0) 5273 return key_senderror(so, m, EINVAL); 5274 5275 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5276 return key_senderror(so, m, EINVAL); 5277 5278 /* get a SA header */ 5279 if ((sah = key_getsah(&saidx)) == NULL) { 5280 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 5281 return key_senderror(so, m, ENOENT); 5282 } 5283 5284 /* set spidx if there */ 5285 /* XXX rewrite */ 5286 error = key_setident(sah, m, mhp); 5287 if (error) 5288 return key_senderror(so, m, error); 5289 5290 /* find a SA with sequence number. */ 5291 #ifdef IPSEC_DOSEQCHECK 5292 if (mhp->msg->sadb_msg_seq != 0 5293 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5294 ipseclog((LOG_DEBUG, 5295 "key_update: no larval SA with sequence %u exists.\n", 5296 mhp->msg->sadb_msg_seq)); 5297 return key_senderror(so, m, ENOENT); 5298 } 5299 #else 5300 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 5301 ipseclog((LOG_DEBUG, 5302 "key_update: no such a SA found (spi:%u)\n", 5303 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5304 return key_senderror(so, m, EINVAL); 5305 } 5306 #endif 5307 5308 /* validity check */ 5309 if (sav->sah->saidx.proto != proto) { 5310 ipseclog((LOG_DEBUG, 5311 "key_update: protocol mismatched (DB=%u param=%u)\n", 5312 sav->sah->saidx.proto, proto)); 5313 return key_senderror(so, m, EINVAL); 5314 } 5315 #ifdef IPSEC_DOSEQCHECK 5316 if (sav->spi != sa0->sadb_sa_spi) { 5317 ipseclog((LOG_DEBUG, 5318 "key_update: SPI mismatched (DB:%u param:%u)\n", 5319 (u_int32_t)ntohl(sav->spi), 5320 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5321 return key_senderror(so, m, EINVAL); 5322 } 5323 #endif 5324 if (sav->pid != mhp->msg->sadb_msg_pid) { 5325 ipseclog((LOG_DEBUG, 5326 "key_update: pid mismatched (DB:%u param:%u)\n", 5327 sav->pid, mhp->msg->sadb_msg_pid)); 5328 return key_senderror(so, m, EINVAL); 5329 } 5330 5331 /* copy sav values */ 5332 error = key_setsaval(sav, m, mhp); 5333 if (error) { 5334 KEY_FREESAV(&sav); 5335 return key_senderror(so, m, error); 5336 } 5337 5338 if ((error = key_handle_natt_info(sav,mhp)) != 0) 5339 return key_senderror(so, m, EINVAL); 5340 5341 /* check SA values to be mature. */ 5342 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5343 KEY_FREESAV(&sav); 5344 return key_senderror(so, m, 0); 5345 } 5346 5347 { 5348 struct mbuf *n; 5349 5350 /* set msg buf from mhp */ 5351 n = key_getmsgbuf_x1(m, mhp); 5352 if (n == NULL) { 5353 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5354 return key_senderror(so, m, ENOBUFS); 5355 } 5356 5357 m_freem(m); 5358 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5359 } 5360 } 5361 5362 /* 5363 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5364 * only called by key_update(). 5365 * OUT: 5366 * NULL : not found 5367 * others : found, pointer to a SA. 5368 */ 5369 #ifdef IPSEC_DOSEQCHECK 5370 static struct secasvar * 5371 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5372 { 5373 struct secasvar *sav; 5374 u_int state; 5375 5376 state = SADB_SASTATE_LARVAL; 5377 5378 /* search SAD with sequence number ? */ 5379 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5380 5381 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5382 5383 if (sav->seq == seq) { 5384 SA_ADDREF(sav); 5385 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5386 printf("DP %s cause refcnt++:%d SA:%p\n", 5387 __func__, sav->refcnt, sav)); 5388 return sav; 5389 } 5390 } 5391 5392 return NULL; 5393 } 5394 #endif 5395 5396 /* 5397 * SADB_ADD processing 5398 * add an entry to SA database, when received 5399 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5400 * key(AE), (identity(SD),) (sensitivity)> 5401 * from the ikmpd, 5402 * and send 5403 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5404 * (identity(SD),) (sensitivity)> 5405 * to the ikmpd. 5406 * 5407 * IGNORE identity and sensitivity messages. 5408 * 5409 * m will always be freed. 5410 */ 5411 static int 5412 key_add(struct socket *so, struct mbuf *m, 5413 const struct sadb_msghdr *mhp) 5414 { 5415 struct sadb_sa *sa0; 5416 struct sadb_address *src0, *dst0; 5417 struct secasindex saidx; 5418 struct secashead *newsah; 5419 struct secasvar *newsav; 5420 u_int16_t proto; 5421 u_int8_t mode; 5422 u_int16_t reqid; 5423 int error; 5424 5425 /* sanity check */ 5426 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5427 panic("key_add: NULL pointer is passed"); 5428 5429 /* map satype to proto */ 5430 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5431 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5432 return key_senderror(so, m, EINVAL); 5433 } 5434 5435 if (mhp->ext[SADB_EXT_SA] == NULL || 5436 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5437 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5438 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5439 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5440 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5441 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5442 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5443 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5444 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5445 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5446 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5447 return key_senderror(so, m, EINVAL); 5448 } 5449 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5450 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5451 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5452 /* XXX need more */ 5453 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5454 return key_senderror(so, m, EINVAL); 5455 } 5456 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5457 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5458 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5459 } else { 5460 mode = IPSEC_MODE_ANY; 5461 reqid = 0; 5462 } 5463 5464 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5465 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5466 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5467 5468 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5469 dst0 + 1, &saidx)) != 0) 5470 return key_senderror(so, m, EINVAL); 5471 5472 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5473 return key_senderror(so, m, EINVAL); 5474 5475 /* get a SA header */ 5476 if ((newsah = key_getsah(&saidx)) == NULL) { 5477 /* create a new SA header */ 5478 if ((newsah = key_newsah(&saidx)) == NULL) { 5479 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5480 return key_senderror(so, m, ENOBUFS); 5481 } 5482 } 5483 5484 /* set spidx if there */ 5485 /* XXX rewrite */ 5486 error = key_setident(newsah, m, mhp); 5487 if (error) { 5488 return key_senderror(so, m, error); 5489 } 5490 5491 /* create new SA entry. */ 5492 /* We can create new SA only if SPI is differenct. */ 5493 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5494 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5495 return key_senderror(so, m, EEXIST); 5496 } 5497 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5498 if (newsav == NULL) { 5499 return key_senderror(so, m, error); 5500 } 5501 5502 if ((error = key_handle_natt_info(newsav, mhp)) != 0) 5503 return key_senderror(so, m, EINVAL); 5504 5505 /* check SA values to be mature. */ 5506 if ((error = key_mature(newsav)) != 0) { 5507 KEY_FREESAV(&newsav); 5508 return key_senderror(so, m, error); 5509 } 5510 5511 /* 5512 * don't call key_freesav() here, as we would like to keep the SA 5513 * in the database on success. 5514 */ 5515 5516 { 5517 struct mbuf *n; 5518 5519 /* set msg buf from mhp */ 5520 n = key_getmsgbuf_x1(m, mhp); 5521 if (n == NULL) { 5522 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5523 return key_senderror(so, m, ENOBUFS); 5524 } 5525 5526 m_freem(m); 5527 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5528 } 5529 } 5530 5531 /* m is retained */ 5532 static int 5533 key_setident(struct secashead *sah, struct mbuf *m, 5534 const struct sadb_msghdr *mhp) 5535 { 5536 const struct sadb_ident *idsrc, *iddst; 5537 int idsrclen, iddstlen; 5538 5539 /* sanity check */ 5540 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5541 panic("key_setident: NULL pointer is passed"); 5542 5543 /* don't make buffer if not there */ 5544 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5545 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5546 sah->idents = NULL; 5547 sah->identd = NULL; 5548 return 0; 5549 } 5550 5551 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5552 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5553 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5554 return EINVAL; 5555 } 5556 5557 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5558 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5559 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5560 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5561 5562 /* validity check */ 5563 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5564 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5565 return EINVAL; 5566 } 5567 5568 switch (idsrc->sadb_ident_type) { 5569 case SADB_IDENTTYPE_PREFIX: 5570 case SADB_IDENTTYPE_FQDN: 5571 case SADB_IDENTTYPE_USERFQDN: 5572 default: 5573 /* XXX do nothing */ 5574 sah->idents = NULL; 5575 sah->identd = NULL; 5576 return 0; 5577 } 5578 5579 /* make structure */ 5580 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5581 if (sah->idents == NULL) { 5582 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5583 return ENOBUFS; 5584 } 5585 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5586 if (sah->identd == NULL) { 5587 KFREE(sah->idents); 5588 sah->idents = NULL; 5589 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5590 return ENOBUFS; 5591 } 5592 memcpy(sah->idents, idsrc, idsrclen); 5593 memcpy(sah->identd, iddst, iddstlen); 5594 5595 return 0; 5596 } 5597 5598 /* 5599 * m will not be freed on return. 5600 * it is caller's responsibility to free the result. 5601 */ 5602 static struct mbuf * 5603 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5604 { 5605 struct mbuf *n; 5606 5607 /* sanity check */ 5608 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5609 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5610 5611 /* create new sadb_msg to reply. */ 5612 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5613 SADB_EXT_SA, SADB_X_EXT_SA2, 5614 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5615 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5616 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5617 if (!n) 5618 return NULL; 5619 5620 if (n->m_len < sizeof(struct sadb_msg)) { 5621 n = m_pullup(n, sizeof(struct sadb_msg)); 5622 if (n == NULL) 5623 return NULL; 5624 } 5625 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5626 mtod(n, struct sadb_msg *)->sadb_msg_len = 5627 PFKEY_UNIT64(n->m_pkthdr.len); 5628 5629 return n; 5630 } 5631 5632 static int key_delete_all (struct socket *, struct mbuf *, 5633 const struct sadb_msghdr *, u_int16_t); 5634 5635 /* 5636 * SADB_DELETE processing 5637 * receive 5638 * <base, SA(*), address(SD)> 5639 * from the ikmpd, and set SADB_SASTATE_DEAD, 5640 * and send, 5641 * <base, SA(*), address(SD)> 5642 * to the ikmpd. 5643 * 5644 * m will always be freed. 5645 */ 5646 static int 5647 key_delete(struct socket *so, struct mbuf *m, 5648 const struct sadb_msghdr *mhp) 5649 { 5650 struct sadb_sa *sa0; 5651 struct sadb_address *src0, *dst0; 5652 struct secasindex saidx; 5653 struct secashead *sah; 5654 struct secasvar *sav = NULL; 5655 u_int16_t proto; 5656 int error; 5657 5658 /* sanity check */ 5659 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5660 panic("key_delete: NULL pointer is passed"); 5661 5662 /* map satype to proto */ 5663 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5664 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5665 return key_senderror(so, m, EINVAL); 5666 } 5667 5668 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5669 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5670 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5671 return key_senderror(so, m, EINVAL); 5672 } 5673 5674 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5675 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5676 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5677 return key_senderror(so, m, EINVAL); 5678 } 5679 5680 if (mhp->ext[SADB_EXT_SA] == NULL) { 5681 /* 5682 * Caller wants us to delete all non-LARVAL SAs 5683 * that match the src/dst. This is used during 5684 * IKE INITIAL-CONTACT. 5685 */ 5686 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5687 return key_delete_all(so, m, mhp, proto); 5688 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5689 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5690 return key_senderror(so, m, EINVAL); 5691 } 5692 5693 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5694 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5695 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5696 5697 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5698 dst0 + 1, &saidx)) != 0) 5699 return key_senderror(so, m, EINVAL); 5700 5701 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5702 return key_senderror(so, m, EINVAL); 5703 5704 /* get a SA header */ 5705 LIST_FOREACH(sah, &sahtree, chain) { 5706 if (sah->state == SADB_SASTATE_DEAD) 5707 continue; 5708 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5709 continue; 5710 5711 /* get a SA with SPI. */ 5712 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5713 if (sav) 5714 break; 5715 } 5716 if (sah == NULL) { 5717 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5718 return key_senderror(so, m, ENOENT); 5719 } 5720 5721 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5722 KEY_FREESAV(&sav); 5723 5724 { 5725 struct mbuf *n; 5726 struct sadb_msg *newmsg; 5727 5728 /* create new sadb_msg to reply. */ 5729 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5730 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5731 if (!n) 5732 return key_senderror(so, m, ENOBUFS); 5733 5734 if (n->m_len < sizeof(struct sadb_msg)) { 5735 n = m_pullup(n, sizeof(struct sadb_msg)); 5736 if (n == NULL) 5737 return key_senderror(so, m, ENOBUFS); 5738 } 5739 newmsg = mtod(n, struct sadb_msg *); 5740 newmsg->sadb_msg_errno = 0; 5741 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5742 5743 m_freem(m); 5744 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5745 } 5746 } 5747 5748 /* 5749 * delete all SAs for src/dst. Called from key_delete(). 5750 */ 5751 static int 5752 key_delete_all(struct socket *so, struct mbuf *m, 5753 const struct sadb_msghdr *mhp, u_int16_t proto) 5754 { 5755 struct sadb_address *src0, *dst0; 5756 struct secasindex saidx; 5757 struct secashead *sah; 5758 struct secasvar *sav, *nextsav; 5759 u_int stateidx, state; 5760 int error; 5761 5762 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5763 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5764 5765 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5766 dst0 + 1, &saidx)) != 0) 5767 return key_senderror(so, m, EINVAL); 5768 5769 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5770 return key_senderror(so, m, EINVAL); 5771 5772 LIST_FOREACH(sah, &sahtree, chain) { 5773 if (sah->state == SADB_SASTATE_DEAD) 5774 continue; 5775 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5776 continue; 5777 5778 /* Delete all non-LARVAL SAs. */ 5779 for (stateidx = 0; 5780 stateidx < _ARRAYLEN(saorder_state_alive); 5781 stateidx++) { 5782 state = saorder_state_alive[stateidx]; 5783 if (state == SADB_SASTATE_LARVAL) 5784 continue; 5785 for (sav = LIST_FIRST(&sah->savtree[state]); 5786 sav != NULL; sav = nextsav) { 5787 nextsav = LIST_NEXT(sav, chain); 5788 /* sanity check */ 5789 if (sav->state != state) { 5790 ipseclog((LOG_DEBUG, "key_delete_all: " 5791 "invalid sav->state " 5792 "(queue: %d SA: %d)\n", 5793 state, sav->state)); 5794 continue; 5795 } 5796 5797 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5798 KEY_FREESAV(&sav); 5799 } 5800 } 5801 } 5802 { 5803 struct mbuf *n; 5804 struct sadb_msg *newmsg; 5805 5806 /* create new sadb_msg to reply. */ 5807 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5808 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5809 if (!n) 5810 return key_senderror(so, m, ENOBUFS); 5811 5812 if (n->m_len < sizeof(struct sadb_msg)) { 5813 n = m_pullup(n, sizeof(struct sadb_msg)); 5814 if (n == NULL) 5815 return key_senderror(so, m, ENOBUFS); 5816 } 5817 newmsg = mtod(n, struct sadb_msg *); 5818 newmsg->sadb_msg_errno = 0; 5819 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5820 5821 m_freem(m); 5822 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5823 } 5824 } 5825 5826 /* 5827 * SADB_GET processing 5828 * receive 5829 * <base, SA(*), address(SD)> 5830 * from the ikmpd, and get a SP and a SA to respond, 5831 * and send, 5832 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5833 * (identity(SD),) (sensitivity)> 5834 * to the ikmpd. 5835 * 5836 * m will always be freed. 5837 */ 5838 static int 5839 key_get(struct socket *so, struct mbuf *m, 5840 const struct sadb_msghdr *mhp) 5841 { 5842 struct sadb_sa *sa0; 5843 struct sadb_address *src0, *dst0; 5844 struct secasindex saidx; 5845 struct secashead *sah; 5846 struct secasvar *sav = NULL; 5847 u_int16_t proto; 5848 int error; 5849 5850 /* sanity check */ 5851 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5852 panic("key_get: NULL pointer is passed"); 5853 5854 /* map satype to proto */ 5855 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5856 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5857 return key_senderror(so, m, EINVAL); 5858 } 5859 5860 if (mhp->ext[SADB_EXT_SA] == NULL || 5861 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5862 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5863 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5864 return key_senderror(so, m, EINVAL); 5865 } 5866 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5867 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5868 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5869 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5870 return key_senderror(so, m, EINVAL); 5871 } 5872 5873 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5874 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5875 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5876 5877 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5878 dst0 + 1, &saidx)) != 0) 5879 return key_senderror(so, m, EINVAL); 5880 5881 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5882 return key_senderror(so, m, EINVAL); 5883 5884 /* get a SA header */ 5885 LIST_FOREACH(sah, &sahtree, chain) { 5886 if (sah->state == SADB_SASTATE_DEAD) 5887 continue; 5888 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5889 continue; 5890 5891 /* get a SA with SPI. */ 5892 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5893 if (sav) 5894 break; 5895 } 5896 if (sah == NULL) { 5897 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5898 return key_senderror(so, m, ENOENT); 5899 } 5900 5901 { 5902 struct mbuf *n; 5903 u_int8_t satype; 5904 5905 /* map proto to satype */ 5906 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5907 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5908 return key_senderror(so, m, EINVAL); 5909 } 5910 5911 /* create new sadb_msg to reply. */ 5912 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5913 mhp->msg->sadb_msg_pid); 5914 if (!n) 5915 return key_senderror(so, m, ENOBUFS); 5916 5917 m_freem(m); 5918 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5919 } 5920 } 5921 5922 /* XXX make it sysctl-configurable? */ 5923 static void 5924 key_getcomb_setlifetime(struct sadb_comb *comb) 5925 { 5926 5927 comb->sadb_comb_soft_allocations = 1; 5928 comb->sadb_comb_hard_allocations = 1; 5929 comb->sadb_comb_soft_bytes = 0; 5930 comb->sadb_comb_hard_bytes = 0; 5931 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5932 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5933 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5934 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5935 } 5936 5937 /* 5938 * XXX reorder combinations by preference 5939 * XXX no idea if the user wants ESP authentication or not 5940 */ 5941 static struct mbuf * 5942 key_getcomb_esp(void) 5943 { 5944 struct sadb_comb *comb; 5945 const struct enc_xform *algo; 5946 struct mbuf *result = NULL, *m, *n; 5947 int encmin; 5948 int i, off, o; 5949 int totlen; 5950 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5951 5952 m = NULL; 5953 for (i = 1; i <= SADB_EALG_MAX; i++) { 5954 algo = esp_algorithm_lookup(i); 5955 if (algo == NULL) 5956 continue; 5957 5958 /* discard algorithms with key size smaller than system min */ 5959 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5960 continue; 5961 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5962 encmin = ipsec_esp_keymin; 5963 else 5964 encmin = _BITS(algo->minkey); 5965 5966 if (ipsec_esp_auth) 5967 m = key_getcomb_ah(); 5968 else { 5969 IPSEC_ASSERT(l <= MLEN, 5970 ("key_getcomb_esp: l=%u > MLEN=%lu", 5971 l, (u_long) MLEN)); 5972 MGET(m, M_DONTWAIT, MT_DATA); 5973 if (m) { 5974 M_ALIGN(m, l); 5975 m->m_len = l; 5976 m->m_next = NULL; 5977 memset(mtod(m, void *), 0, m->m_len); 5978 } 5979 } 5980 if (!m) 5981 goto fail; 5982 5983 totlen = 0; 5984 for (n = m; n; n = n->m_next) 5985 totlen += n->m_len; 5986 IPSEC_ASSERT((totlen % l) == 0, 5987 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 5988 5989 for (off = 0; off < totlen; off += l) { 5990 n = m_pulldown(m, off, l, &o); 5991 if (!n) { 5992 /* m is already freed */ 5993 goto fail; 5994 } 5995 comb = (struct sadb_comb *)(mtod(n, char *) + o); 5996 memset(comb, 0, sizeof(*comb)); 5997 key_getcomb_setlifetime(comb); 5998 comb->sadb_comb_encrypt = i; 5999 comb->sadb_comb_encrypt_minbits = encmin; 6000 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6001 } 6002 6003 if (!result) 6004 result = m; 6005 else 6006 m_cat(result, m); 6007 } 6008 6009 return result; 6010 6011 fail: 6012 if (result) 6013 m_freem(result); 6014 return NULL; 6015 } 6016 6017 static void 6018 key_getsizes_ah(const struct auth_hash *ah, int alg, 6019 u_int16_t* ksmin, u_int16_t* ksmax) 6020 { 6021 *ksmin = *ksmax = ah->keysize; 6022 if (ah->keysize == 0) { 6023 /* 6024 * Transform takes arbitrary key size but algorithm 6025 * key size is restricted. Enforce this here. 6026 */ 6027 switch (alg) { 6028 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6029 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6030 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 6031 default: 6032 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 6033 alg)); 6034 break; 6035 } 6036 } 6037 } 6038 6039 /* 6040 * XXX reorder combinations by preference 6041 */ 6042 static struct mbuf * 6043 key_getcomb_ah(void) 6044 { 6045 struct sadb_comb *comb; 6046 const struct auth_hash *algo; 6047 struct mbuf *m; 6048 u_int16_t minkeysize, maxkeysize; 6049 int i; 6050 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6051 6052 m = NULL; 6053 for (i = 1; i <= SADB_AALG_MAX; i++) { 6054 #if 1 6055 /* we prefer HMAC algorithms, not old algorithms */ 6056 if (i != SADB_AALG_SHA1HMAC && 6057 i != SADB_AALG_MD5HMAC && 6058 i != SADB_X_AALG_SHA2_256 && 6059 i != SADB_X_AALG_SHA2_384 && 6060 i != SADB_X_AALG_SHA2_512) 6061 continue; 6062 #endif 6063 algo = ah_algorithm_lookup(i); 6064 if (!algo) 6065 continue; 6066 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6067 /* discard algorithms with key size smaller than system min */ 6068 if (_BITS(minkeysize) < ipsec_ah_keymin) 6069 continue; 6070 6071 if (!m) { 6072 IPSEC_ASSERT(l <= MLEN, 6073 ("key_getcomb_ah: l=%u > MLEN=%lu", 6074 l, (u_long) MLEN)); 6075 MGET(m, M_DONTWAIT, MT_DATA); 6076 if (m) { 6077 M_ALIGN(m, l); 6078 m->m_len = l; 6079 m->m_next = NULL; 6080 } 6081 } else 6082 M_PREPEND(m, l, M_DONTWAIT); 6083 if (!m) 6084 return NULL; 6085 6086 comb = mtod(m, struct sadb_comb *); 6087 memset(comb, 0, sizeof(*comb)); 6088 key_getcomb_setlifetime(comb); 6089 comb->sadb_comb_auth = i; 6090 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6091 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6092 } 6093 6094 return m; 6095 } 6096 6097 /* 6098 * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 6099 * XXX reorder combinations by preference 6100 */ 6101 static struct mbuf * 6102 key_getcomb_ipcomp(void) 6103 { 6104 struct sadb_comb *comb; 6105 const struct comp_algo *algo; 6106 struct mbuf *m; 6107 int i; 6108 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6109 6110 m = NULL; 6111 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6112 algo = ipcomp_algorithm_lookup(i); 6113 if (!algo) 6114 continue; 6115 6116 if (!m) { 6117 IPSEC_ASSERT(l <= MLEN, 6118 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 6119 l, (u_long) MLEN)); 6120 MGET(m, M_DONTWAIT, MT_DATA); 6121 if (m) { 6122 M_ALIGN(m, l); 6123 m->m_len = l; 6124 m->m_next = NULL; 6125 } 6126 } else 6127 M_PREPEND(m, l, M_DONTWAIT); 6128 if (!m) 6129 return NULL; 6130 6131 comb = mtod(m, struct sadb_comb *); 6132 memset(comb, 0, sizeof(*comb)); 6133 key_getcomb_setlifetime(comb); 6134 comb->sadb_comb_encrypt = i; 6135 /* what should we set into sadb_comb_*_{min,max}bits? */ 6136 } 6137 6138 return m; 6139 } 6140 6141 /* 6142 * XXX no way to pass mode (transport/tunnel) to userland 6143 * XXX replay checking? 6144 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6145 */ 6146 static struct mbuf * 6147 key_getprop(const struct secasindex *saidx) 6148 { 6149 struct sadb_prop *prop; 6150 struct mbuf *m, *n; 6151 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6152 int totlen; 6153 6154 switch (saidx->proto) { 6155 case IPPROTO_ESP: 6156 m = key_getcomb_esp(); 6157 break; 6158 case IPPROTO_AH: 6159 m = key_getcomb_ah(); 6160 break; 6161 case IPPROTO_IPCOMP: 6162 m = key_getcomb_ipcomp(); 6163 break; 6164 default: 6165 return NULL; 6166 } 6167 6168 if (!m) 6169 return NULL; 6170 M_PREPEND(m, l, M_DONTWAIT); 6171 if (!m) 6172 return NULL; 6173 6174 totlen = 0; 6175 for (n = m; n; n = n->m_next) 6176 totlen += n->m_len; 6177 6178 prop = mtod(m, struct sadb_prop *); 6179 memset(prop, 0, sizeof(*prop)); 6180 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6181 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6182 prop->sadb_prop_replay = 32; /* XXX */ 6183 6184 return m; 6185 } 6186 6187 /* 6188 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6189 * send 6190 * <base, SA, address(SD), (address(P)), x_policy, 6191 * (identity(SD),) (sensitivity,) proposal> 6192 * to KMD, and expect to receive 6193 * <base> with SADB_ACQUIRE if error occurred, 6194 * or 6195 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6196 * from KMD by PF_KEY. 6197 * 6198 * XXX x_policy is outside of RFC2367 (KAME extension). 6199 * XXX sensitivity is not supported. 6200 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6201 * see comment for key_getcomb_ipcomp(). 6202 * 6203 * OUT: 6204 * 0 : succeed 6205 * others: error number 6206 */ 6207 static int 6208 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6209 { 6210 struct mbuf *result = NULL, *m; 6211 #ifndef IPSEC_NONBLOCK_ACQUIRE 6212 struct secacq *newacq; 6213 #endif 6214 u_int8_t satype; 6215 int error = -1; 6216 u_int32_t seq; 6217 6218 /* sanity check */ 6219 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 6220 satype = key_proto2satype(saidx->proto); 6221 IPSEC_ASSERT(satype != 0, 6222 ("key_acquire: null satype, protocol %u", saidx->proto)); 6223 6224 #ifndef IPSEC_NONBLOCK_ACQUIRE 6225 /* 6226 * We never do anything about acquirng SA. There is anather 6227 * solution that kernel blocks to send SADB_ACQUIRE message until 6228 * getting something message from IKEd. In later case, to be 6229 * managed with ACQUIRING list. 6230 */ 6231 /* Get an entry to check whether sending message or not. */ 6232 if ((newacq = key_getacq(saidx)) != NULL) { 6233 if (key_blockacq_count < newacq->count) { 6234 /* reset counter and do send message. */ 6235 newacq->count = 0; 6236 } else { 6237 /* increment counter and do nothing. */ 6238 newacq->count++; 6239 return 0; 6240 } 6241 } else { 6242 /* make new entry for blocking to send SADB_ACQUIRE. */ 6243 if ((newacq = key_newacq(saidx)) == NULL) 6244 return ENOBUFS; 6245 6246 /* add to acqtree */ 6247 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6248 } 6249 #endif 6250 6251 6252 #ifndef IPSEC_NONBLOCK_ACQUIRE 6253 seq = newacq->seq; 6254 #else 6255 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6256 #endif 6257 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6258 if (!m) { 6259 error = ENOBUFS; 6260 goto fail; 6261 } 6262 result = m; 6263 6264 /* set sadb_address for saidx's. */ 6265 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6266 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6267 if (!m) { 6268 error = ENOBUFS; 6269 goto fail; 6270 } 6271 m_cat(result, m); 6272 6273 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6274 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6275 if (!m) { 6276 error = ENOBUFS; 6277 goto fail; 6278 } 6279 m_cat(result, m); 6280 6281 /* XXX proxy address (optional) */ 6282 6283 /* set sadb_x_policy */ 6284 if (sp) { 6285 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6286 if (!m) { 6287 error = ENOBUFS; 6288 goto fail; 6289 } 6290 m_cat(result, m); 6291 } 6292 6293 /* XXX identity (optional) */ 6294 #if 0 6295 if (idexttype && fqdn) { 6296 /* create identity extension (FQDN) */ 6297 struct sadb_ident *id; 6298 int fqdnlen; 6299 6300 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6301 id = (struct sadb_ident *)p; 6302 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6303 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6304 id->sadb_ident_exttype = idexttype; 6305 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6306 memcpy(id + 1, fqdn, fqdnlen); 6307 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6308 } 6309 6310 if (idexttype) { 6311 /* create identity extension (USERFQDN) */ 6312 struct sadb_ident *id; 6313 int userfqdnlen; 6314 6315 if (userfqdn) { 6316 /* +1 for terminating-NUL */ 6317 userfqdnlen = strlen(userfqdn) + 1; 6318 } else 6319 userfqdnlen = 0; 6320 id = (struct sadb_ident *)p; 6321 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6322 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6323 id->sadb_ident_exttype = idexttype; 6324 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6325 /* XXX is it correct? */ 6326 if (curlwp) 6327 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6328 if (userfqdn && userfqdnlen) 6329 memcpy(id + 1, userfqdn, userfqdnlen); 6330 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6331 } 6332 #endif 6333 6334 /* XXX sensitivity (optional) */ 6335 6336 /* create proposal/combination extension */ 6337 m = key_getprop(saidx); 6338 #if 0 6339 /* 6340 * spec conformant: always attach proposal/combination extension, 6341 * the problem is that we have no way to attach it for ipcomp, 6342 * due to the way sadb_comb is declared in RFC2367. 6343 */ 6344 if (!m) { 6345 error = ENOBUFS; 6346 goto fail; 6347 } 6348 m_cat(result, m); 6349 #else 6350 /* 6351 * outside of spec; make proposal/combination extension optional. 6352 */ 6353 if (m) 6354 m_cat(result, m); 6355 #endif 6356 6357 if ((result->m_flags & M_PKTHDR) == 0) { 6358 error = EINVAL; 6359 goto fail; 6360 } 6361 6362 if (result->m_len < sizeof(struct sadb_msg)) { 6363 result = m_pullup(result, sizeof(struct sadb_msg)); 6364 if (result == NULL) { 6365 error = ENOBUFS; 6366 goto fail; 6367 } 6368 } 6369 6370 result->m_pkthdr.len = 0; 6371 for (m = result; m; m = m->m_next) 6372 result->m_pkthdr.len += m->m_len; 6373 6374 mtod(result, struct sadb_msg *)->sadb_msg_len = 6375 PFKEY_UNIT64(result->m_pkthdr.len); 6376 6377 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6378 6379 fail: 6380 if (result) 6381 m_freem(result); 6382 return error; 6383 } 6384 6385 #ifndef IPSEC_NONBLOCK_ACQUIRE 6386 static struct secacq * 6387 key_newacq(const struct secasindex *saidx) 6388 { 6389 struct secacq *newacq; 6390 6391 /* get new entry */ 6392 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6393 if (newacq == NULL) { 6394 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6395 return NULL; 6396 } 6397 memset(newacq, 0, sizeof(*newacq)); 6398 6399 /* copy secindex */ 6400 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6401 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6402 newacq->created = time_uptime; 6403 newacq->count = 0; 6404 6405 return newacq; 6406 } 6407 6408 static struct secacq * 6409 key_getacq(const struct secasindex *saidx) 6410 { 6411 struct secacq *acq; 6412 6413 LIST_FOREACH(acq, &acqtree, chain) { 6414 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6415 return acq; 6416 } 6417 6418 return NULL; 6419 } 6420 6421 static struct secacq * 6422 key_getacqbyseq(u_int32_t seq) 6423 { 6424 struct secacq *acq; 6425 6426 LIST_FOREACH(acq, &acqtree, chain) { 6427 if (acq->seq == seq) 6428 return acq; 6429 } 6430 6431 return NULL; 6432 } 6433 #endif 6434 6435 static struct secspacq * 6436 key_newspacq(const struct secpolicyindex *spidx) 6437 { 6438 struct secspacq *acq; 6439 6440 /* get new entry */ 6441 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6442 if (acq == NULL) { 6443 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6444 return NULL; 6445 } 6446 memset(acq, 0, sizeof(*acq)); 6447 6448 /* copy secindex */ 6449 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6450 acq->created = time_uptime; 6451 acq->count = 0; 6452 6453 return acq; 6454 } 6455 6456 static struct secspacq * 6457 key_getspacq(const struct secpolicyindex *spidx) 6458 { 6459 struct secspacq *acq; 6460 6461 LIST_FOREACH(acq, &spacqtree, chain) { 6462 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6463 return acq; 6464 } 6465 6466 return NULL; 6467 } 6468 6469 /* 6470 * SADB_ACQUIRE processing, 6471 * in first situation, is receiving 6472 * <base> 6473 * from the ikmpd, and clear sequence of its secasvar entry. 6474 * 6475 * In second situation, is receiving 6476 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6477 * from a user land process, and return 6478 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6479 * to the socket. 6480 * 6481 * m will always be freed. 6482 */ 6483 static int 6484 key_acquire2(struct socket *so, struct mbuf *m, 6485 const struct sadb_msghdr *mhp) 6486 { 6487 const struct sadb_address *src0, *dst0; 6488 struct secasindex saidx; 6489 struct secashead *sah; 6490 u_int16_t proto; 6491 int error; 6492 6493 /* sanity check */ 6494 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6495 panic("key_acquire2: NULL pointer is passed"); 6496 6497 /* 6498 * Error message from KMd. 6499 * We assume that if error was occurred in IKEd, the length of PFKEY 6500 * message is equal to the size of sadb_msg structure. 6501 * We do not raise error even if error occurred in this function. 6502 */ 6503 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6504 #ifndef IPSEC_NONBLOCK_ACQUIRE 6505 struct secacq *acq; 6506 6507 /* check sequence number */ 6508 if (mhp->msg->sadb_msg_seq == 0) { 6509 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6510 m_freem(m); 6511 return 0; 6512 } 6513 6514 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6515 /* 6516 * the specified larval SA is already gone, or we got 6517 * a bogus sequence number. we can silently ignore it. 6518 */ 6519 m_freem(m); 6520 return 0; 6521 } 6522 6523 /* reset acq counter in order to deletion by timehander. */ 6524 acq->created = time_uptime; 6525 acq->count = 0; 6526 #endif 6527 m_freem(m); 6528 return 0; 6529 } 6530 6531 /* 6532 * This message is from user land. 6533 */ 6534 6535 /* map satype to proto */ 6536 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6537 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6538 return key_senderror(so, m, EINVAL); 6539 } 6540 6541 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6542 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6543 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6544 /* error */ 6545 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6546 return key_senderror(so, m, EINVAL); 6547 } 6548 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6549 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6550 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6551 /* error */ 6552 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6553 return key_senderror(so, m, EINVAL); 6554 } 6555 6556 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6557 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6558 6559 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 6560 dst0 + 1, &saidx)) != 0) 6561 return key_senderror(so, m, EINVAL); 6562 6563 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 6564 return key_senderror(so, m, EINVAL); 6565 6566 /* get a SA index */ 6567 LIST_FOREACH(sah, &sahtree, chain) { 6568 if (sah->state == SADB_SASTATE_DEAD) 6569 continue; 6570 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6571 break; 6572 } 6573 if (sah != NULL) { 6574 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6575 return key_senderror(so, m, EEXIST); 6576 } 6577 6578 error = key_acquire(&saidx, NULL); 6579 if (error != 0) { 6580 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6581 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6582 return key_senderror(so, m, error); 6583 } 6584 6585 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6586 } 6587 6588 /* 6589 * SADB_REGISTER processing. 6590 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6591 * receive 6592 * <base> 6593 * from the ikmpd, and register a socket to send PF_KEY messages, 6594 * and send 6595 * <base, supported> 6596 * to KMD by PF_KEY. 6597 * If socket is detached, must free from regnode. 6598 * 6599 * m will always be freed. 6600 */ 6601 static int 6602 key_register(struct socket *so, struct mbuf *m, 6603 const struct sadb_msghdr *mhp) 6604 { 6605 struct secreg *reg, *newreg = 0; 6606 6607 /* sanity check */ 6608 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6609 panic("key_register: NULL pointer is passed"); 6610 6611 /* check for invalid register message */ 6612 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6613 return key_senderror(so, m, EINVAL); 6614 6615 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6616 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6617 goto setmsg; 6618 6619 /* check whether existing or not */ 6620 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6621 if (reg->so == so) { 6622 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6623 return key_senderror(so, m, EEXIST); 6624 } 6625 } 6626 6627 /* create regnode */ 6628 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6629 if (newreg == NULL) { 6630 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6631 return key_senderror(so, m, ENOBUFS); 6632 } 6633 memset(newreg, 0, sizeof(*newreg)); 6634 6635 newreg->so = so; 6636 ((struct keycb *)sotorawcb(so))->kp_registered++; 6637 6638 /* add regnode to regtree. */ 6639 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6640 6641 setmsg: 6642 { 6643 struct mbuf *n; 6644 struct sadb_msg *newmsg; 6645 struct sadb_supported *sup; 6646 u_int len, alen, elen; 6647 int off; 6648 int i; 6649 struct sadb_alg *alg; 6650 6651 /* create new sadb_msg to reply. */ 6652 alen = 0; 6653 for (i = 1; i <= SADB_AALG_MAX; i++) { 6654 if (ah_algorithm_lookup(i)) 6655 alen += sizeof(struct sadb_alg); 6656 } 6657 if (alen) 6658 alen += sizeof(struct sadb_supported); 6659 elen = 0; 6660 for (i = 1; i <= SADB_EALG_MAX; i++) { 6661 if (esp_algorithm_lookup(i)) 6662 elen += sizeof(struct sadb_alg); 6663 } 6664 if (elen) 6665 elen += sizeof(struct sadb_supported); 6666 6667 len = sizeof(struct sadb_msg) + alen + elen; 6668 6669 if (len > MCLBYTES) 6670 return key_senderror(so, m, ENOBUFS); 6671 6672 MGETHDR(n, M_DONTWAIT, MT_DATA); 6673 if (len > MHLEN) { 6674 MCLGET(n, M_DONTWAIT); 6675 if ((n->m_flags & M_EXT) == 0) { 6676 m_freem(n); 6677 n = NULL; 6678 } 6679 } 6680 if (!n) 6681 return key_senderror(so, m, ENOBUFS); 6682 6683 n->m_pkthdr.len = n->m_len = len; 6684 n->m_next = NULL; 6685 off = 0; 6686 6687 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6688 newmsg = mtod(n, struct sadb_msg *); 6689 newmsg->sadb_msg_errno = 0; 6690 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6691 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6692 6693 /* for authentication algorithm */ 6694 if (alen) { 6695 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6696 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6697 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6698 off += PFKEY_ALIGN8(sizeof(*sup)); 6699 6700 for (i = 1; i <= SADB_AALG_MAX; i++) { 6701 const struct auth_hash *aalgo; 6702 u_int16_t minkeysize, maxkeysize; 6703 6704 aalgo = ah_algorithm_lookup(i); 6705 if (!aalgo) 6706 continue; 6707 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6708 alg->sadb_alg_id = i; 6709 alg->sadb_alg_ivlen = 0; 6710 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6711 alg->sadb_alg_minbits = _BITS(minkeysize); 6712 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6713 off += PFKEY_ALIGN8(sizeof(*alg)); 6714 } 6715 } 6716 6717 /* for encryption algorithm */ 6718 if (elen) { 6719 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6720 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6721 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6722 off += PFKEY_ALIGN8(sizeof(*sup)); 6723 6724 for (i = 1; i <= SADB_EALG_MAX; i++) { 6725 const struct enc_xform *ealgo; 6726 6727 ealgo = esp_algorithm_lookup(i); 6728 if (!ealgo) 6729 continue; 6730 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6731 alg->sadb_alg_id = i; 6732 alg->sadb_alg_ivlen = ealgo->blocksize; 6733 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6734 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6735 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6736 } 6737 } 6738 6739 #ifdef DIAGNOSTIC 6740 if (off != len) 6741 panic("length assumption failed in key_register"); 6742 #endif 6743 6744 m_freem(m); 6745 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6746 } 6747 } 6748 6749 /* 6750 * free secreg entry registered. 6751 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6752 */ 6753 void 6754 key_freereg(struct socket *so) 6755 { 6756 struct secreg *reg; 6757 int i; 6758 6759 /* sanity check */ 6760 if (so == NULL) 6761 panic("key_freereg: NULL pointer is passed"); 6762 6763 /* 6764 * check whether existing or not. 6765 * check all type of SA, because there is a potential that 6766 * one socket is registered to multiple type of SA. 6767 */ 6768 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6769 LIST_FOREACH(reg, ®tree[i], chain) { 6770 if (reg->so == so 6771 && __LIST_CHAINED(reg)) { 6772 LIST_REMOVE(reg, chain); 6773 KFREE(reg); 6774 break; 6775 } 6776 } 6777 } 6778 6779 return; 6780 } 6781 6782 /* 6783 * SADB_EXPIRE processing 6784 * send 6785 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6786 * to KMD by PF_KEY. 6787 * NOTE: We send only soft lifetime extension. 6788 * 6789 * OUT: 0 : succeed 6790 * others : error number 6791 */ 6792 static int 6793 key_expire(struct secasvar *sav) 6794 { 6795 int s; 6796 int satype; 6797 struct mbuf *result = NULL, *m; 6798 int len; 6799 int error = -1; 6800 struct sadb_lifetime *lt; 6801 6802 /* XXX: Why do we lock ? */ 6803 s = splsoftnet(); /*called from softclock()*/ 6804 6805 /* sanity check */ 6806 if (sav == NULL) 6807 panic("key_expire: NULL pointer is passed"); 6808 if (sav->sah == NULL) 6809 panic("key_expire: Why was SA index in SA NULL"); 6810 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6811 panic("key_expire: invalid proto is passed"); 6812 6813 /* set msg header */ 6814 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6815 if (!m) { 6816 error = ENOBUFS; 6817 goto fail; 6818 } 6819 result = m; 6820 6821 /* create SA extension */ 6822 m = key_setsadbsa(sav); 6823 if (!m) { 6824 error = ENOBUFS; 6825 goto fail; 6826 } 6827 m_cat(result, m); 6828 6829 /* create SA extension */ 6830 m = key_setsadbxsa2(sav->sah->saidx.mode, 6831 sav->replay ? sav->replay->count : 0, 6832 sav->sah->saidx.reqid); 6833 if (!m) { 6834 error = ENOBUFS; 6835 goto fail; 6836 } 6837 m_cat(result, m); 6838 6839 /* create lifetime extension (current and soft) */ 6840 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6841 m = key_alloc_mbuf(len); 6842 if (!m || m->m_next) { /*XXX*/ 6843 if (m) 6844 m_freem(m); 6845 error = ENOBUFS; 6846 goto fail; 6847 } 6848 memset(mtod(m, void *), 0, len); 6849 lt = mtod(m, struct sadb_lifetime *); 6850 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6851 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6852 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6853 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6854 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime 6855 + time_second - time_uptime; 6856 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime 6857 + time_second - time_uptime; 6858 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6859 memcpy(lt, sav->lft_s, sizeof(*lt)); 6860 m_cat(result, m); 6861 6862 /* set sadb_address for source */ 6863 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6864 &sav->sah->saidx.src.sa, 6865 FULLMASK, IPSEC_ULPROTO_ANY); 6866 if (!m) { 6867 error = ENOBUFS; 6868 goto fail; 6869 } 6870 m_cat(result, m); 6871 6872 /* set sadb_address for destination */ 6873 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6874 &sav->sah->saidx.dst.sa, 6875 FULLMASK, IPSEC_ULPROTO_ANY); 6876 if (!m) { 6877 error = ENOBUFS; 6878 goto fail; 6879 } 6880 m_cat(result, m); 6881 6882 if ((result->m_flags & M_PKTHDR) == 0) { 6883 error = EINVAL; 6884 goto fail; 6885 } 6886 6887 if (result->m_len < sizeof(struct sadb_msg)) { 6888 result = m_pullup(result, sizeof(struct sadb_msg)); 6889 if (result == NULL) { 6890 error = ENOBUFS; 6891 goto fail; 6892 } 6893 } 6894 6895 result->m_pkthdr.len = 0; 6896 for (m = result; m; m = m->m_next) 6897 result->m_pkthdr.len += m->m_len; 6898 6899 mtod(result, struct sadb_msg *)->sadb_msg_len = 6900 PFKEY_UNIT64(result->m_pkthdr.len); 6901 6902 splx(s); 6903 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6904 6905 fail: 6906 if (result) 6907 m_freem(result); 6908 splx(s); 6909 return error; 6910 } 6911 6912 /* 6913 * SADB_FLUSH processing 6914 * receive 6915 * <base> 6916 * from the ikmpd, and free all entries in secastree. 6917 * and send, 6918 * <base> 6919 * to the ikmpd. 6920 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6921 * 6922 * m will always be freed. 6923 */ 6924 static int 6925 key_flush(struct socket *so, struct mbuf *m, 6926 const struct sadb_msghdr *mhp) 6927 { 6928 struct sadb_msg *newmsg; 6929 struct secashead *sah, *nextsah; 6930 struct secasvar *sav, *nextsav; 6931 u_int16_t proto; 6932 u_int8_t state; 6933 u_int stateidx; 6934 6935 /* sanity check */ 6936 if (so == NULL || mhp == NULL || mhp->msg == NULL) 6937 panic("key_flush: NULL pointer is passed"); 6938 6939 /* map satype to proto */ 6940 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6941 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6942 return key_senderror(so, m, EINVAL); 6943 } 6944 6945 /* no SATYPE specified, i.e. flushing all SA. */ 6946 for (sah = LIST_FIRST(&sahtree); 6947 sah != NULL; 6948 sah = nextsah) { 6949 nextsah = LIST_NEXT(sah, chain); 6950 6951 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6952 && proto != sah->saidx.proto) 6953 continue; 6954 6955 for (stateidx = 0; 6956 stateidx < _ARRAYLEN(saorder_state_alive); 6957 stateidx++) { 6958 state = saorder_state_any[stateidx]; 6959 for (sav = LIST_FIRST(&sah->savtree[state]); 6960 sav != NULL; 6961 sav = nextsav) { 6962 6963 nextsav = LIST_NEXT(sav, chain); 6964 6965 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6966 KEY_FREESAV(&sav); 6967 } 6968 } 6969 6970 sah->state = SADB_SASTATE_DEAD; 6971 } 6972 6973 if (m->m_len < sizeof(struct sadb_msg) || 6974 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6975 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 6976 return key_senderror(so, m, ENOBUFS); 6977 } 6978 6979 if (m->m_next) 6980 m_freem(m->m_next); 6981 m->m_next = NULL; 6982 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6983 newmsg = mtod(m, struct sadb_msg *); 6984 newmsg->sadb_msg_errno = 0; 6985 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6986 6987 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6988 } 6989 6990 6991 static struct mbuf * 6992 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6993 { 6994 struct secashead *sah; 6995 struct secasvar *sav; 6996 u_int16_t proto; 6997 u_int stateidx; 6998 u_int8_t satype; 6999 u_int8_t state; 7000 int cnt; 7001 struct mbuf *m, *n, *prev; 7002 7003 *lenp = 0; 7004 7005 /* map satype to proto */ 7006 if ((proto = key_satype2proto(req_satype)) == 0) { 7007 *errorp = EINVAL; 7008 return (NULL); 7009 } 7010 7011 /* count sav entries to be sent to userland. */ 7012 cnt = 0; 7013 LIST_FOREACH(sah, &sahtree, chain) { 7014 if (req_satype != SADB_SATYPE_UNSPEC && 7015 proto != sah->saidx.proto) 7016 continue; 7017 7018 for (stateidx = 0; 7019 stateidx < _ARRAYLEN(saorder_state_any); 7020 stateidx++) { 7021 state = saorder_state_any[stateidx]; 7022 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7023 cnt++; 7024 } 7025 } 7026 } 7027 7028 if (cnt == 0) { 7029 *errorp = ENOENT; 7030 return (NULL); 7031 } 7032 7033 /* send this to the userland, one at a time. */ 7034 m = NULL; 7035 prev = m; 7036 LIST_FOREACH(sah, &sahtree, chain) { 7037 if (req_satype != SADB_SATYPE_UNSPEC && 7038 proto != sah->saidx.proto) 7039 continue; 7040 7041 /* map proto to satype */ 7042 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7043 m_freem(m); 7044 *errorp = EINVAL; 7045 return (NULL); 7046 } 7047 7048 for (stateidx = 0; 7049 stateidx < _ARRAYLEN(saorder_state_any); 7050 stateidx++) { 7051 state = saorder_state_any[stateidx]; 7052 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7053 n = key_setdumpsa(sav, SADB_DUMP, satype, 7054 --cnt, pid); 7055 if (!n) { 7056 m_freem(m); 7057 *errorp = ENOBUFS; 7058 return (NULL); 7059 } 7060 7061 if (!m) 7062 m = n; 7063 else 7064 prev->m_nextpkt = n; 7065 prev = n; 7066 } 7067 } 7068 } 7069 7070 if (!m) { 7071 *errorp = EINVAL; 7072 return (NULL); 7073 } 7074 7075 if ((m->m_flags & M_PKTHDR) != 0) { 7076 m->m_pkthdr.len = 0; 7077 for (n = m; n; n = n->m_next) 7078 m->m_pkthdr.len += n->m_len; 7079 } 7080 7081 *errorp = 0; 7082 return (m); 7083 } 7084 7085 /* 7086 * SADB_DUMP processing 7087 * dump all entries including status of DEAD in SAD. 7088 * receive 7089 * <base> 7090 * from the ikmpd, and dump all secasvar leaves 7091 * and send, 7092 * <base> ..... 7093 * to the ikmpd. 7094 * 7095 * m will always be freed. 7096 */ 7097 static int 7098 key_dump(struct socket *so, struct mbuf *m0, 7099 const struct sadb_msghdr *mhp) 7100 { 7101 u_int16_t proto; 7102 u_int8_t satype; 7103 struct mbuf *n; 7104 int s; 7105 int error, len, ok; 7106 7107 /* sanity check */ 7108 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 7109 panic("key_dump: NULL pointer is passed"); 7110 7111 /* map satype to proto */ 7112 satype = mhp->msg->sadb_msg_satype; 7113 if ((proto = key_satype2proto(satype)) == 0) { 7114 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 7115 return key_senderror(so, m0, EINVAL); 7116 } 7117 7118 /* 7119 * If the requestor has insufficient socket-buffer space 7120 * for the entire chain, nobody gets any response to the DUMP. 7121 * XXX For now, only the requestor ever gets anything. 7122 * Moreover, if the requestor has any space at all, they receive 7123 * the entire chain, otherwise the request is refused with ENOBUFS. 7124 */ 7125 if (sbspace(&so->so_rcv) <= 0) { 7126 return key_senderror(so, m0, ENOBUFS); 7127 } 7128 7129 s = splsoftnet(); 7130 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7131 splx(s); 7132 7133 if (n == NULL) { 7134 return key_senderror(so, m0, ENOENT); 7135 } 7136 { 7137 uint64_t *ps = PFKEY_STAT_GETREF(); 7138 ps[PFKEY_STAT_IN_TOTAL]++; 7139 ps[PFKEY_STAT_IN_BYTES] += len; 7140 PFKEY_STAT_PUTREF(); 7141 } 7142 7143 /* 7144 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7145 * The requestor receives either the entire chain, or an 7146 * error message with ENOBUFS. 7147 * 7148 * sbappendaddrchain() takes the chain of entries, one 7149 * packet-record per SPD entry, prepends the key_src sockaddr 7150 * to each packet-record, links the sockaddr mbufs into a new 7151 * list of records, then appends the entire resulting 7152 * list to the requesting socket. 7153 */ 7154 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 7155 n, SB_PRIO_ONESHOT_OVERFLOW); 7156 7157 if (!ok) { 7158 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7159 m_freem(n); 7160 return key_senderror(so, m0, ENOBUFS); 7161 } 7162 7163 m_freem(m0); 7164 return 0; 7165 } 7166 7167 /* 7168 * SADB_X_PROMISC processing 7169 * 7170 * m will always be freed. 7171 */ 7172 static int 7173 key_promisc(struct socket *so, struct mbuf *m, 7174 const struct sadb_msghdr *mhp) 7175 { 7176 int olen; 7177 7178 /* sanity check */ 7179 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 7180 panic("key_promisc: NULL pointer is passed"); 7181 7182 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7183 7184 if (olen < sizeof(struct sadb_msg)) { 7185 #if 1 7186 return key_senderror(so, m, EINVAL); 7187 #else 7188 m_freem(m); 7189 return 0; 7190 #endif 7191 } else if (olen == sizeof(struct sadb_msg)) { 7192 /* enable/disable promisc mode */ 7193 struct keycb *kp; 7194 7195 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7196 return key_senderror(so, m, EINVAL); 7197 mhp->msg->sadb_msg_errno = 0; 7198 switch (mhp->msg->sadb_msg_satype) { 7199 case 0: 7200 case 1: 7201 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7202 break; 7203 default: 7204 return key_senderror(so, m, EINVAL); 7205 } 7206 7207 /* send the original message back to everyone */ 7208 mhp->msg->sadb_msg_errno = 0; 7209 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7210 } else { 7211 /* send packet as is */ 7212 7213 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7214 7215 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7216 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7217 } 7218 } 7219 7220 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7221 const struct sadb_msghdr *) = { 7222 NULL, /* SADB_RESERVED */ 7223 key_getspi, /* SADB_GETSPI */ 7224 key_update, /* SADB_UPDATE */ 7225 key_add, /* SADB_ADD */ 7226 key_delete, /* SADB_DELETE */ 7227 key_get, /* SADB_GET */ 7228 key_acquire2, /* SADB_ACQUIRE */ 7229 key_register, /* SADB_REGISTER */ 7230 NULL, /* SADB_EXPIRE */ 7231 key_flush, /* SADB_FLUSH */ 7232 key_dump, /* SADB_DUMP */ 7233 key_promisc, /* SADB_X_PROMISC */ 7234 NULL, /* SADB_X_PCHANGE */ 7235 key_spdadd, /* SADB_X_SPDUPDATE */ 7236 key_spdadd, /* SADB_X_SPDADD */ 7237 key_spddelete, /* SADB_X_SPDDELETE */ 7238 key_spdget, /* SADB_X_SPDGET */ 7239 NULL, /* SADB_X_SPDACQUIRE */ 7240 key_spddump, /* SADB_X_SPDDUMP */ 7241 key_spdflush, /* SADB_X_SPDFLUSH */ 7242 key_spdadd, /* SADB_X_SPDSETIDX */ 7243 NULL, /* SADB_X_SPDEXPIRE */ 7244 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7245 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7246 }; 7247 7248 /* 7249 * parse sadb_msg buffer to process PFKEYv2, 7250 * and create a data to response if needed. 7251 * I think to be dealed with mbuf directly. 7252 * IN: 7253 * msgp : pointer to pointer to a received buffer pulluped. 7254 * This is rewrited to response. 7255 * so : pointer to socket. 7256 * OUT: 7257 * length for buffer to send to user process. 7258 */ 7259 int 7260 key_parse(struct mbuf *m, struct socket *so) 7261 { 7262 struct sadb_msg *msg; 7263 struct sadb_msghdr mh; 7264 int error; 7265 int target; 7266 7267 /* sanity check */ 7268 if (m == NULL || so == NULL) 7269 panic("key_parse: NULL pointer is passed"); 7270 7271 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7272 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7273 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 7274 kdebug_sadb(msg)); 7275 #endif 7276 7277 if (m->m_len < sizeof(struct sadb_msg)) { 7278 m = m_pullup(m, sizeof(struct sadb_msg)); 7279 if (!m) 7280 return ENOBUFS; 7281 } 7282 msg = mtod(m, struct sadb_msg *); 7283 target = KEY_SENDUP_ONE; 7284 7285 if ((m->m_flags & M_PKTHDR) == 0 || 7286 m->m_pkthdr.len != m->m_pkthdr.len) { 7287 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 7288 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7289 error = EINVAL; 7290 goto senderror; 7291 } 7292 7293 if (msg->sadb_msg_version != PF_KEY_V2) { 7294 ipseclog((LOG_DEBUG, 7295 "key_parse: PF_KEY version %u is mismatched.\n", 7296 msg->sadb_msg_version)); 7297 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7298 error = EINVAL; 7299 goto senderror; 7300 } 7301 7302 if (msg->sadb_msg_type > SADB_MAX) { 7303 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7304 msg->sadb_msg_type)); 7305 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7306 error = EINVAL; 7307 goto senderror; 7308 } 7309 7310 /* for old-fashioned code - should be nuked */ 7311 if (m->m_pkthdr.len > MCLBYTES) { 7312 m_freem(m); 7313 return ENOBUFS; 7314 } 7315 if (m->m_next) { 7316 struct mbuf *n; 7317 7318 MGETHDR(n, M_DONTWAIT, MT_DATA); 7319 if (n && m->m_pkthdr.len > MHLEN) { 7320 MCLGET(n, M_DONTWAIT); 7321 if ((n->m_flags & M_EXT) == 0) { 7322 m_free(n); 7323 n = NULL; 7324 } 7325 } 7326 if (!n) { 7327 m_freem(m); 7328 return ENOBUFS; 7329 } 7330 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7331 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7332 n->m_next = NULL; 7333 m_freem(m); 7334 m = n; 7335 } 7336 7337 /* align the mbuf chain so that extensions are in contiguous region. */ 7338 error = key_align(m, &mh); 7339 if (error) 7340 return error; 7341 7342 if (m->m_next) { /*XXX*/ 7343 m_freem(m); 7344 return ENOBUFS; 7345 } 7346 7347 msg = mh.msg; 7348 7349 /* check SA type */ 7350 switch (msg->sadb_msg_satype) { 7351 case SADB_SATYPE_UNSPEC: 7352 switch (msg->sadb_msg_type) { 7353 case SADB_GETSPI: 7354 case SADB_UPDATE: 7355 case SADB_ADD: 7356 case SADB_DELETE: 7357 case SADB_GET: 7358 case SADB_ACQUIRE: 7359 case SADB_EXPIRE: 7360 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7361 "when msg type=%u.\n", msg->sadb_msg_type)); 7362 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7363 error = EINVAL; 7364 goto senderror; 7365 } 7366 break; 7367 case SADB_SATYPE_AH: 7368 case SADB_SATYPE_ESP: 7369 case SADB_X_SATYPE_IPCOMP: 7370 case SADB_X_SATYPE_TCPSIGNATURE: 7371 switch (msg->sadb_msg_type) { 7372 case SADB_X_SPDADD: 7373 case SADB_X_SPDDELETE: 7374 case SADB_X_SPDGET: 7375 case SADB_X_SPDDUMP: 7376 case SADB_X_SPDFLUSH: 7377 case SADB_X_SPDSETIDX: 7378 case SADB_X_SPDUPDATE: 7379 case SADB_X_SPDDELETE2: 7380 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7381 msg->sadb_msg_type)); 7382 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7383 error = EINVAL; 7384 goto senderror; 7385 } 7386 break; 7387 case SADB_SATYPE_RSVP: 7388 case SADB_SATYPE_OSPFV2: 7389 case SADB_SATYPE_RIPV2: 7390 case SADB_SATYPE_MIP: 7391 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7392 msg->sadb_msg_satype)); 7393 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7394 error = EOPNOTSUPP; 7395 goto senderror; 7396 case 1: /* XXX: What does it do? */ 7397 if (msg->sadb_msg_type == SADB_X_PROMISC) 7398 break; 7399 /*FALLTHROUGH*/ 7400 default: 7401 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7402 msg->sadb_msg_satype)); 7403 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7404 error = EINVAL; 7405 goto senderror; 7406 } 7407 7408 /* check field of upper layer protocol and address family */ 7409 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7410 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7411 struct sadb_address *src0, *dst0; 7412 u_int plen; 7413 7414 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7415 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7416 7417 /* check upper layer protocol */ 7418 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7419 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7420 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7421 error = EINVAL; 7422 goto senderror; 7423 } 7424 7425 /* check family */ 7426 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7427 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7428 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7429 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7430 error = EINVAL; 7431 goto senderror; 7432 } 7433 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7434 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7435 ipseclog((LOG_DEBUG, 7436 "key_parse: address struct size mismatched.\n")); 7437 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7438 error = EINVAL; 7439 goto senderror; 7440 } 7441 7442 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7443 case AF_INET: 7444 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7445 sizeof(struct sockaddr_in)) { 7446 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7447 error = EINVAL; 7448 goto senderror; 7449 } 7450 break; 7451 case AF_INET6: 7452 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7453 sizeof(struct sockaddr_in6)) { 7454 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7455 error = EINVAL; 7456 goto senderror; 7457 } 7458 break; 7459 default: 7460 ipseclog((LOG_DEBUG, 7461 "key_parse: unsupported address family.\n")); 7462 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7463 error = EAFNOSUPPORT; 7464 goto senderror; 7465 } 7466 7467 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7468 case AF_INET: 7469 plen = sizeof(struct in_addr) << 3; 7470 break; 7471 case AF_INET6: 7472 plen = sizeof(struct in6_addr) << 3; 7473 break; 7474 default: 7475 plen = 0; /*fool gcc*/ 7476 break; 7477 } 7478 7479 /* check max prefix length */ 7480 if (src0->sadb_address_prefixlen > plen || 7481 dst0->sadb_address_prefixlen > plen) { 7482 ipseclog((LOG_DEBUG, 7483 "key_parse: illegal prefixlen.\n")); 7484 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7485 error = EINVAL; 7486 goto senderror; 7487 } 7488 7489 /* 7490 * prefixlen == 0 is valid because there can be a case when 7491 * all addresses are matched. 7492 */ 7493 } 7494 7495 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7496 key_typesw[msg->sadb_msg_type] == NULL) { 7497 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7498 error = EINVAL; 7499 goto senderror; 7500 } 7501 7502 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7503 7504 senderror: 7505 msg->sadb_msg_errno = error; 7506 return key_sendup_mbuf(so, m, target); 7507 } 7508 7509 static int 7510 key_senderror(struct socket *so, struct mbuf *m, int code) 7511 { 7512 struct sadb_msg *msg; 7513 7514 if (m->m_len < sizeof(struct sadb_msg)) 7515 panic("invalid mbuf passed to key_senderror"); 7516 7517 msg = mtod(m, struct sadb_msg *); 7518 msg->sadb_msg_errno = code; 7519 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7520 } 7521 7522 /* 7523 * set the pointer to each header into message buffer. 7524 * m will be freed on error. 7525 * XXX larger-than-MCLBYTES extension? 7526 */ 7527 static int 7528 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7529 { 7530 struct mbuf *n; 7531 struct sadb_ext *ext; 7532 size_t off, end; 7533 int extlen; 7534 int toff; 7535 7536 /* sanity check */ 7537 if (m == NULL || mhp == NULL) 7538 panic("key_align: NULL pointer is passed"); 7539 if (m->m_len < sizeof(struct sadb_msg)) 7540 panic("invalid mbuf passed to key_align"); 7541 7542 /* initialize */ 7543 memset(mhp, 0, sizeof(*mhp)); 7544 7545 mhp->msg = mtod(m, struct sadb_msg *); 7546 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7547 7548 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7549 extlen = end; /*just in case extlen is not updated*/ 7550 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7551 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7552 if (!n) { 7553 /* m is already freed */ 7554 return ENOBUFS; 7555 } 7556 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7557 7558 /* set pointer */ 7559 switch (ext->sadb_ext_type) { 7560 case SADB_EXT_SA: 7561 case SADB_EXT_ADDRESS_SRC: 7562 case SADB_EXT_ADDRESS_DST: 7563 case SADB_EXT_ADDRESS_PROXY: 7564 case SADB_EXT_LIFETIME_CURRENT: 7565 case SADB_EXT_LIFETIME_HARD: 7566 case SADB_EXT_LIFETIME_SOFT: 7567 case SADB_EXT_KEY_AUTH: 7568 case SADB_EXT_KEY_ENCRYPT: 7569 case SADB_EXT_IDENTITY_SRC: 7570 case SADB_EXT_IDENTITY_DST: 7571 case SADB_EXT_SENSITIVITY: 7572 case SADB_EXT_PROPOSAL: 7573 case SADB_EXT_SUPPORTED_AUTH: 7574 case SADB_EXT_SUPPORTED_ENCRYPT: 7575 case SADB_EXT_SPIRANGE: 7576 case SADB_X_EXT_POLICY: 7577 case SADB_X_EXT_SA2: 7578 case SADB_X_EXT_NAT_T_TYPE: 7579 case SADB_X_EXT_NAT_T_SPORT: 7580 case SADB_X_EXT_NAT_T_DPORT: 7581 case SADB_X_EXT_NAT_T_OAI: 7582 case SADB_X_EXT_NAT_T_OAR: 7583 case SADB_X_EXT_NAT_T_FRAG: 7584 /* duplicate check */ 7585 /* 7586 * XXX Are there duplication payloads of either 7587 * KEY_AUTH or KEY_ENCRYPT ? 7588 */ 7589 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7590 ipseclog((LOG_DEBUG, 7591 "key_align: duplicate ext_type %u " 7592 "is passed.\n", ext->sadb_ext_type)); 7593 m_freem(m); 7594 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7595 return EINVAL; 7596 } 7597 break; 7598 default: 7599 ipseclog((LOG_DEBUG, 7600 "key_align: invalid ext_type %u is passed.\n", 7601 ext->sadb_ext_type)); 7602 m_freem(m); 7603 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7604 return EINVAL; 7605 } 7606 7607 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7608 7609 if (key_validate_ext(ext, extlen)) { 7610 m_freem(m); 7611 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7612 return EINVAL; 7613 } 7614 7615 n = m_pulldown(m, off, extlen, &toff); 7616 if (!n) { 7617 /* m is already freed */ 7618 return ENOBUFS; 7619 } 7620 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7621 7622 mhp->ext[ext->sadb_ext_type] = ext; 7623 mhp->extoff[ext->sadb_ext_type] = off; 7624 mhp->extlen[ext->sadb_ext_type] = extlen; 7625 } 7626 7627 if (off != end) { 7628 m_freem(m); 7629 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7630 return EINVAL; 7631 } 7632 7633 return 0; 7634 } 7635 7636 static int 7637 key_validate_ext(const struct sadb_ext *ext, int len) 7638 { 7639 const struct sockaddr *sa; 7640 enum { NONE, ADDR } checktype = NONE; 7641 int baselen = 0; 7642 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7643 7644 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7645 return EINVAL; 7646 7647 /* if it does not match minimum/maximum length, bail */ 7648 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7649 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7650 return EINVAL; 7651 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7652 return EINVAL; 7653 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7654 return EINVAL; 7655 7656 /* more checks based on sadb_ext_type XXX need more */ 7657 switch (ext->sadb_ext_type) { 7658 case SADB_EXT_ADDRESS_SRC: 7659 case SADB_EXT_ADDRESS_DST: 7660 case SADB_EXT_ADDRESS_PROXY: 7661 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7662 checktype = ADDR; 7663 break; 7664 case SADB_EXT_IDENTITY_SRC: 7665 case SADB_EXT_IDENTITY_DST: 7666 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7667 SADB_X_IDENTTYPE_ADDR) { 7668 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7669 checktype = ADDR; 7670 } else 7671 checktype = NONE; 7672 break; 7673 default: 7674 checktype = NONE; 7675 break; 7676 } 7677 7678 switch (checktype) { 7679 case NONE: 7680 break; 7681 case ADDR: 7682 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7683 if (len < baselen + sal) 7684 return EINVAL; 7685 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7686 return EINVAL; 7687 break; 7688 } 7689 7690 return 0; 7691 } 7692 7693 static int 7694 key_do_init(void) 7695 { 7696 int i; 7697 7698 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7699 7700 callout_init(&key_timehandler_ch, 0); 7701 7702 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7703 LIST_INIT(&sptree[i]); 7704 } 7705 7706 LIST_INIT(&sahtree); 7707 7708 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7709 LIST_INIT(®tree[i]); 7710 } 7711 7712 #ifndef IPSEC_NONBLOCK_ACQUIRE 7713 LIST_INIT(&acqtree); 7714 #endif 7715 LIST_INIT(&spacqtree); 7716 7717 /* system default */ 7718 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7719 ip4_def_policy.refcnt++; /*never reclaim this*/ 7720 7721 #ifdef INET6 7722 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7723 ip6_def_policy.refcnt++; /*never reclaim this*/ 7724 #endif 7725 7726 7727 #ifndef IPSEC_DEBUG2 7728 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7729 #endif /*IPSEC_DEBUG2*/ 7730 7731 /* initialize key statistics */ 7732 keystat.getspi_count = 1; 7733 7734 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7735 7736 return (0); 7737 } 7738 7739 void 7740 key_init(void) 7741 { 7742 static ONCE_DECL(key_init_once); 7743 7744 RUN_ONCE(&key_init_once, key_do_init); 7745 } 7746 7747 /* 7748 * XXX: maybe This function is called after INBOUND IPsec processing. 7749 * 7750 * Special check for tunnel-mode packets. 7751 * We must make some checks for consistency between inner and outer IP header. 7752 * 7753 * xxx more checks to be provided 7754 */ 7755 int 7756 key_checktunnelsanity( 7757 struct secasvar *sav, 7758 u_int family, 7759 void *src, 7760 void *dst 7761 ) 7762 { 7763 /* sanity check */ 7764 if (sav->sah == NULL) 7765 panic("sav->sah == NULL at key_checktunnelsanity"); 7766 7767 /* XXX: check inner IP header */ 7768 7769 return 1; 7770 } 7771 7772 #if 0 7773 #define hostnamelen strlen(hostname) 7774 7775 /* 7776 * Get FQDN for the host. 7777 * If the administrator configured hostname (by hostname(1)) without 7778 * domain name, returns nothing. 7779 */ 7780 static const char * 7781 key_getfqdn(void) 7782 { 7783 int i; 7784 int hasdot; 7785 static char fqdn[MAXHOSTNAMELEN + 1]; 7786 7787 if (!hostnamelen) 7788 return NULL; 7789 7790 /* check if it comes with domain name. */ 7791 hasdot = 0; 7792 for (i = 0; i < hostnamelen; i++) { 7793 if (hostname[i] == '.') 7794 hasdot++; 7795 } 7796 if (!hasdot) 7797 return NULL; 7798 7799 /* NOTE: hostname may not be NUL-terminated. */ 7800 memset(fqdn, 0, sizeof(fqdn)); 7801 memcpy(fqdn, hostname, hostnamelen); 7802 fqdn[hostnamelen] = '\0'; 7803 return fqdn; 7804 } 7805 7806 /* 7807 * get username@FQDN for the host/user. 7808 */ 7809 static const char * 7810 key_getuserfqdn(void) 7811 { 7812 const char *host; 7813 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7814 struct proc *p = curproc; 7815 char *q; 7816 7817 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7818 return NULL; 7819 if (!(host = key_getfqdn())) 7820 return NULL; 7821 7822 /* NOTE: s_login may not be-NUL terminated. */ 7823 memset(userfqdn, 0, sizeof(userfqdn)); 7824 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7825 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7826 q = userfqdn + strlen(userfqdn); 7827 *q++ = '@'; 7828 memcpy(q, host, strlen(host)); 7829 q += strlen(host); 7830 *q++ = '\0'; 7831 7832 return userfqdn; 7833 } 7834 #endif 7835 7836 /* record data transfer on SA, and update timestamps */ 7837 void 7838 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7839 { 7840 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7841 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7842 if (!sav->lft_c) 7843 return; 7844 7845 /* 7846 * XXX Currently, there is a difference of bytes size 7847 * between inbound and outbound processing. 7848 */ 7849 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7850 /* to check bytes lifetime is done in key_timehandler(). */ 7851 7852 /* 7853 * We use the number of packets as the unit of 7854 * sadb_lifetime_allocations. We increment the variable 7855 * whenever {esp,ah}_{in,out}put is called. 7856 */ 7857 sav->lft_c->sadb_lifetime_allocations++; 7858 /* XXX check for expires? */ 7859 7860 /* 7861 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7862 * in seconds. HARD and SOFT lifetime are measured by the time 7863 * difference (again in seconds) from sadb_lifetime_usetime. 7864 * 7865 * usetime 7866 * v expire expire 7867 * -----+-----+--------+---> t 7868 * <--------------> HARD 7869 * <-----> SOFT 7870 */ 7871 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7872 /* XXX check for expires? */ 7873 7874 return; 7875 } 7876 7877 /* dumb version */ 7878 void 7879 key_sa_routechange(struct sockaddr *dst) 7880 { 7881 struct secashead *sah; 7882 struct route *ro; 7883 const struct sockaddr *sa; 7884 7885 LIST_FOREACH(sah, &sahtree, chain) { 7886 ro = &sah->sa_route; 7887 sa = rtcache_getdst(ro); 7888 if (sa != NULL && dst->sa_len == sa->sa_len && 7889 memcmp(dst, sa, dst->sa_len) == 0) 7890 rtcache_free(ro); 7891 } 7892 7893 return; 7894 } 7895 7896 static void 7897 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7898 { 7899 if (sav == NULL) 7900 panic("key_sa_chgstate called with sav == NULL"); 7901 7902 if (sav->state == state) 7903 return; 7904 7905 if (__LIST_CHAINED(sav)) 7906 LIST_REMOVE(sav, chain); 7907 7908 sav->state = state; 7909 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7910 } 7911 7912 /* XXX too much? */ 7913 static struct mbuf * 7914 key_alloc_mbuf(int l) 7915 { 7916 struct mbuf *m = NULL, *n; 7917 int len, t; 7918 7919 len = l; 7920 while (len > 0) { 7921 MGET(n, M_DONTWAIT, MT_DATA); 7922 if (n && len > MLEN) 7923 MCLGET(n, M_DONTWAIT); 7924 if (!n) { 7925 m_freem(m); 7926 return NULL; 7927 } 7928 7929 n->m_next = NULL; 7930 n->m_len = 0; 7931 n->m_len = M_TRAILINGSPACE(n); 7932 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7933 if (n->m_len > len) { 7934 t = (n->m_len - len) & ~(sizeof(long) - 1); 7935 n->m_data += t; 7936 n->m_len = len; 7937 } 7938 7939 len -= n->m_len; 7940 7941 if (m) 7942 m_cat(m, n); 7943 else 7944 m = n; 7945 } 7946 7947 return m; 7948 } 7949 7950 static struct mbuf * 7951 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7952 { 7953 struct secashead *sah; 7954 struct secasvar *sav; 7955 u_int16_t proto; 7956 u_int stateidx; 7957 u_int8_t satype; 7958 u_int8_t state; 7959 int cnt; 7960 struct mbuf *m, *n; 7961 7962 /* map satype to proto */ 7963 if ((proto = key_satype2proto(req_satype)) == 0) { 7964 *errorp = EINVAL; 7965 return (NULL); 7966 } 7967 7968 /* count sav entries to be sent to the userland. */ 7969 cnt = 0; 7970 LIST_FOREACH(sah, &sahtree, chain) { 7971 if (req_satype != SADB_SATYPE_UNSPEC && 7972 proto != sah->saidx.proto) 7973 continue; 7974 7975 for (stateidx = 0; 7976 stateidx < _ARRAYLEN(saorder_state_any); 7977 stateidx++) { 7978 state = saorder_state_any[stateidx]; 7979 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7980 cnt++; 7981 } 7982 } 7983 } 7984 7985 if (cnt == 0) { 7986 *errorp = ENOENT; 7987 return (NULL); 7988 } 7989 7990 /* send this to the userland, one at a time. */ 7991 m = NULL; 7992 LIST_FOREACH(sah, &sahtree, chain) { 7993 if (req_satype != SADB_SATYPE_UNSPEC && 7994 proto != sah->saidx.proto) 7995 continue; 7996 7997 /* map proto to satype */ 7998 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7999 m_freem(m); 8000 *errorp = EINVAL; 8001 return (NULL); 8002 } 8003 8004 for (stateidx = 0; 8005 stateidx < _ARRAYLEN(saorder_state_any); 8006 stateidx++) { 8007 state = saorder_state_any[stateidx]; 8008 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8009 n = key_setdumpsa(sav, SADB_DUMP, satype, 8010 --cnt, pid); 8011 if (!n) { 8012 m_freem(m); 8013 *errorp = ENOBUFS; 8014 return (NULL); 8015 } 8016 8017 if (!m) 8018 m = n; 8019 else 8020 m_cat(m, n); 8021 } 8022 } 8023 } 8024 8025 if (!m) { 8026 *errorp = EINVAL; 8027 return (NULL); 8028 } 8029 8030 if ((m->m_flags & M_PKTHDR) != 0) { 8031 m->m_pkthdr.len = 0; 8032 for (n = m; n; n = n->m_next) 8033 m->m_pkthdr.len += n->m_len; 8034 } 8035 8036 *errorp = 0; 8037 return (m); 8038 } 8039 8040 static struct mbuf * 8041 key_setspddump(int *errorp, pid_t pid) 8042 { 8043 struct secpolicy *sp; 8044 int cnt; 8045 u_int dir; 8046 struct mbuf *m, *n; 8047 8048 /* search SPD entry and get buffer size. */ 8049 cnt = 0; 8050 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8051 LIST_FOREACH(sp, &sptree[dir], chain) { 8052 cnt++; 8053 } 8054 } 8055 8056 if (cnt == 0) { 8057 *errorp = ENOENT; 8058 return (NULL); 8059 } 8060 8061 m = NULL; 8062 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8063 LIST_FOREACH(sp, &sptree[dir], chain) { 8064 --cnt; 8065 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8066 8067 if (!n) { 8068 *errorp = ENOBUFS; 8069 m_freem(m); 8070 return (NULL); 8071 } 8072 if (!m) 8073 m = n; 8074 else { 8075 m->m_pkthdr.len += n->m_pkthdr.len; 8076 m_cat(m, n); 8077 } 8078 } 8079 } 8080 8081 *errorp = 0; 8082 return (m); 8083 } 8084 8085 static int 8086 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8087 { 8088 struct mbuf *m, *n; 8089 int err2 = 0; 8090 char *p, *ep; 8091 size_t len; 8092 int s, error; 8093 8094 if (newp) 8095 return (EPERM); 8096 if (namelen != 1) 8097 return (EINVAL); 8098 8099 s = splsoftnet(); 8100 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8101 splx(s); 8102 if (!m) 8103 return (error); 8104 if (!oldp) 8105 *oldlenp = m->m_pkthdr.len; 8106 else { 8107 p = oldp; 8108 if (*oldlenp < m->m_pkthdr.len) { 8109 err2 = ENOMEM; 8110 ep = p + *oldlenp; 8111 } else { 8112 *oldlenp = m->m_pkthdr.len; 8113 ep = p + m->m_pkthdr.len; 8114 } 8115 for (n = m; n; n = n->m_next) { 8116 len = (ep - p < n->m_len) ? 8117 ep - p : n->m_len; 8118 error = copyout(mtod(n, const void *), p, len); 8119 p += len; 8120 if (error) 8121 break; 8122 } 8123 if (error == 0) 8124 error = err2; 8125 } 8126 m_freem(m); 8127 8128 return (error); 8129 } 8130 8131 static int 8132 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8133 { 8134 struct mbuf *m, *n; 8135 int err2 = 0; 8136 char *p, *ep; 8137 size_t len; 8138 int s, error; 8139 8140 if (newp) 8141 return (EPERM); 8142 if (namelen != 0) 8143 return (EINVAL); 8144 8145 s = splsoftnet(); 8146 m = key_setspddump(&error, l->l_proc->p_pid); 8147 splx(s); 8148 if (!m) 8149 return (error); 8150 if (!oldp) 8151 *oldlenp = m->m_pkthdr.len; 8152 else { 8153 p = oldp; 8154 if (*oldlenp < m->m_pkthdr.len) { 8155 err2 = ENOMEM; 8156 ep = p + *oldlenp; 8157 } else { 8158 *oldlenp = m->m_pkthdr.len; 8159 ep = p + m->m_pkthdr.len; 8160 } 8161 for (n = m; n; n = n->m_next) { 8162 len = (ep - p < n->m_len) ? 8163 ep - p : n->m_len; 8164 error = copyout(mtod(n, const void *), p, len); 8165 p += len; 8166 if (error) 8167 break; 8168 } 8169 if (error == 0) 8170 error = err2; 8171 } 8172 m_freem(m); 8173 8174 return (error); 8175 } 8176 8177 /* 8178 * Create sysctl tree for native IPSEC key knobs, originally 8179 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8180 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8181 * and in any case the part of our sysctl namespace used for dumping the 8182 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8183 * namespace, for API reasons. 8184 * 8185 * Pending a consensus on the right way to fix this, add a level of 8186 * indirection in how we number the `native' IPSEC key nodes; 8187 * and (as requested by Andrew Brown) move registration of the 8188 * KAME-compatible names to a separate function. 8189 */ 8190 #if 0 8191 # define IPSEC_PFKEY PF_KEY_V2 8192 # define IPSEC_PFKEY_NAME "keyv2" 8193 #else 8194 # define IPSEC_PFKEY PF_KEY 8195 # define IPSEC_PFKEY_NAME "key" 8196 #endif 8197 8198 static int 8199 sysctl_net_key_stats(SYSCTLFN_ARGS) 8200 { 8201 8202 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8203 } 8204 8205 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 8206 { 8207 8208 sysctl_createv(clog, 0, NULL, NULL, 8209 CTLFLAG_PERMANENT, 8210 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8211 NULL, 0, NULL, 0, 8212 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8213 8214 sysctl_createv(clog, 0, NULL, NULL, 8215 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8216 CTLTYPE_INT, "debug", NULL, 8217 NULL, 0, &key_debug_level, 0, 8218 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8219 sysctl_createv(clog, 0, NULL, NULL, 8220 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8221 CTLTYPE_INT, "spi_try", NULL, 8222 NULL, 0, &key_spi_trycnt, 0, 8223 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8224 sysctl_createv(clog, 0, NULL, NULL, 8225 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8226 CTLTYPE_INT, "spi_min_value", NULL, 8227 NULL, 0, &key_spi_minval, 0, 8228 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8229 sysctl_createv(clog, 0, NULL, NULL, 8230 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8231 CTLTYPE_INT, "spi_max_value", NULL, 8232 NULL, 0, &key_spi_maxval, 0, 8233 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8234 sysctl_createv(clog, 0, NULL, NULL, 8235 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8236 CTLTYPE_INT, "random_int", NULL, 8237 NULL, 0, &key_int_random, 0, 8238 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8239 sysctl_createv(clog, 0, NULL, NULL, 8240 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8241 CTLTYPE_INT, "larval_lifetime", NULL, 8242 NULL, 0, &key_larval_lifetime, 0, 8243 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8244 sysctl_createv(clog, 0, NULL, NULL, 8245 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8246 CTLTYPE_INT, "blockacq_count", NULL, 8247 NULL, 0, &key_blockacq_count, 0, 8248 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8249 sysctl_createv(clog, 0, NULL, NULL, 8250 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8251 CTLTYPE_INT, "blockacq_lifetime", NULL, 8252 NULL, 0, &key_blockacq_lifetime, 0, 8253 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8254 sysctl_createv(clog, 0, NULL, NULL, 8255 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8256 CTLTYPE_INT, "esp_keymin", NULL, 8257 NULL, 0, &ipsec_esp_keymin, 0, 8258 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8259 sysctl_createv(clog, 0, NULL, NULL, 8260 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8261 CTLTYPE_INT, "prefered_oldsa", NULL, 8262 NULL, 0, &key_prefered_oldsa, 0, 8263 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8264 sysctl_createv(clog, 0, NULL, NULL, 8265 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8266 CTLTYPE_INT, "esp_auth", NULL, 8267 NULL, 0, &ipsec_esp_auth, 0, 8268 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8269 sysctl_createv(clog, 0, NULL, NULL, 8270 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8271 CTLTYPE_INT, "ah_keymin", NULL, 8272 NULL, 0, &ipsec_ah_keymin, 0, 8273 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8274 sysctl_createv(clog, 0, NULL, NULL, 8275 CTLFLAG_PERMANENT, 8276 CTLTYPE_STRUCT, "stats", 8277 SYSCTL_DESCR("PF_KEY statistics"), 8278 sysctl_net_key_stats, 0, NULL, 0, 8279 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8280 } 8281 8282 /* 8283 * Register sysctl names used by setkey(8). For historical reasons, 8284 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8285 * for both IPSEC and KAME IPSEC. 8286 */ 8287 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for IPSEC") 8288 { 8289 8290 sysctl_createv(clog, 0, NULL, NULL, 8291 CTLFLAG_PERMANENT, 8292 CTLTYPE_NODE, "key", NULL, 8293 NULL, 0, NULL, 0, 8294 CTL_NET, PF_KEY, CTL_EOL); 8295 8296 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8297 sysctl_createv(clog, 0, NULL, NULL, 8298 CTLFLAG_PERMANENT, 8299 CTLTYPE_STRUCT, "dumpsa", NULL, 8300 sysctl_net_key_dumpsa, 0, NULL, 0, 8301 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8302 sysctl_createv(clog, 0, NULL, NULL, 8303 CTLFLAG_PERMANENT, 8304 CTLTYPE_STRUCT, "dumpsp", NULL, 8305 sysctl_net_key_dumpsp, 0, NULL, 0, 8306 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8307 } 8308