1 /* $NetBSD: key.c,v 1.91 2014/06/16 03:34:45 christos 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 1.91 2014/06/16 03:34:45 christos 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 1224 /* Does it have a PCB ? */ 1225 if (pcb == NULL) 1226 return; 1227 1228 struct inpcbpolicy *sp = pcb->inp_sp; 1229 key_freesp_so(&sp->sp_in); 1230 key_freesp_so(&sp->sp_out); 1231 } 1232 break; 1233 #endif 1234 #ifdef INET6 1235 case PF_INET6: 1236 { 1237 #ifdef HAVE_NRL_INPCB 1238 struct inpcb *pcb = sotoinpcb(so); 1239 struct inpcbpolicy *sp = pcb->inp_sp; 1240 1241 /* Does it have a PCB ? */ 1242 if (pcb == NULL) 1243 return; 1244 key_freesp_so(&sp->sp_in); 1245 key_freesp_so(&sp->sp_out); 1246 #else 1247 struct in6pcb *pcb = sotoin6pcb(so); 1248 1249 /* Does it have a PCB ? */ 1250 if (pcb == NULL) 1251 return; 1252 key_freesp_so(&pcb->in6p_sp->sp_in); 1253 key_freesp_so(&pcb->in6p_sp->sp_out); 1254 #endif 1255 } 1256 break; 1257 #endif /* INET6 */ 1258 default: 1259 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1260 so->so_proto->pr_domain->dom_family)); 1261 return; 1262 } 1263 } 1264 1265 static void 1266 key_freesp_so(struct secpolicy **sp) 1267 { 1268 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp")); 1269 1270 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1271 (*sp)->policy == IPSEC_POLICY_BYPASS) 1272 return; 1273 1274 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1275 ("key_freesp_so: invalid policy %u", (*sp)->policy)); 1276 KEY_FREESP(sp); 1277 } 1278 1279 /* 1280 * Must be called after calling key_allocsa(). 1281 * This function is called by key_freesp() to free some SA allocated 1282 * for a policy. 1283 */ 1284 void 1285 key_freesav(struct secasvar **psav, const char* where, int tag) 1286 { 1287 struct secasvar *sav = *psav; 1288 1289 IPSEC_ASSERT(sav != NULL, ("key_freesav: null sav")); 1290 1291 SA_DELREF(sav); 1292 1293 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1294 printf("DP %s SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1295 __func__, sav, (u_long)ntohl(sav->spi), where, tag, 1296 sav->refcnt)); 1297 1298 if (sav->refcnt == 0) { 1299 *psav = NULL; 1300 key_delsav(sav); 1301 } 1302 } 1303 1304 /* %%% SPD management */ 1305 /* 1306 * free security policy entry. 1307 */ 1308 static void 1309 key_delsp(struct secpolicy *sp) 1310 { 1311 int s; 1312 1313 IPSEC_ASSERT(sp != NULL, ("key_delsp: null sp")); 1314 1315 key_sp_dead(sp); 1316 1317 IPSEC_ASSERT(sp->refcnt == 0, 1318 ("key_delsp: SP with references deleted (refcnt %u)", 1319 sp->refcnt)); 1320 1321 s = splsoftnet(); /*called from softclock()*/ 1322 1323 { 1324 struct ipsecrequest *isr = sp->req, *nextisr; 1325 1326 while (isr != NULL) { 1327 if (isr->sav != NULL) { 1328 KEY_FREESAV(&isr->sav); 1329 isr->sav = NULL; 1330 } 1331 1332 nextisr = isr->next; 1333 KFREE(isr); 1334 isr = nextisr; 1335 } 1336 } 1337 1338 KFREE(sp); 1339 1340 splx(s); 1341 } 1342 1343 /* 1344 * search SPD 1345 * OUT: NULL : not found 1346 * others : found, pointer to a SP. 1347 */ 1348 static struct secpolicy * 1349 key_getsp(const struct secpolicyindex *spidx) 1350 { 1351 struct secpolicy *sp; 1352 1353 IPSEC_ASSERT(spidx != NULL, ("key_getsp: null spidx")); 1354 1355 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1356 if (sp->state == IPSEC_SPSTATE_DEAD) 1357 continue; 1358 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1359 SP_ADDREF(sp); 1360 return sp; 1361 } 1362 } 1363 1364 return NULL; 1365 } 1366 1367 /* 1368 * get SP by index. 1369 * OUT: NULL : not found 1370 * others : found, pointer to a SP. 1371 */ 1372 static struct secpolicy * 1373 key_getspbyid(u_int32_t id) 1374 { 1375 struct secpolicy *sp; 1376 1377 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1378 if (sp->state == IPSEC_SPSTATE_DEAD) 1379 continue; 1380 if (sp->id == id) { 1381 SP_ADDREF(sp); 1382 return sp; 1383 } 1384 } 1385 1386 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1387 if (sp->state == IPSEC_SPSTATE_DEAD) 1388 continue; 1389 if (sp->id == id) { 1390 SP_ADDREF(sp); 1391 return sp; 1392 } 1393 } 1394 1395 return NULL; 1396 } 1397 1398 struct secpolicy * 1399 key_newsp(const char* where, int tag) 1400 { 1401 struct secpolicy *newsp = NULL; 1402 1403 newsp = (struct secpolicy *) 1404 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); 1405 if (newsp) { 1406 newsp->refcnt = 1; 1407 newsp->req = NULL; 1408 } 1409 1410 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1411 printf("DP %s from %s:%u return SP:%p\n", __func__, 1412 where, tag, newsp)); 1413 return newsp; 1414 } 1415 1416 /* 1417 * create secpolicy structure from sadb_x_policy structure. 1418 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1419 * so must be set properly later. 1420 */ 1421 struct secpolicy * 1422 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1423 { 1424 struct secpolicy *newsp; 1425 1426 /* sanity check */ 1427 if (xpl0 == NULL) 1428 panic("key_msg2sp: NULL pointer was passed"); 1429 if (len < sizeof(*xpl0)) 1430 panic("key_msg2sp: invalid length"); 1431 if (len != PFKEY_EXTLEN(xpl0)) { 1432 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1433 *error = EINVAL; 1434 return NULL; 1435 } 1436 1437 if ((newsp = KEY_NEWSP()) == NULL) { 1438 *error = ENOBUFS; 1439 return NULL; 1440 } 1441 1442 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1443 newsp->policy = xpl0->sadb_x_policy_type; 1444 1445 /* check policy */ 1446 switch (xpl0->sadb_x_policy_type) { 1447 case IPSEC_POLICY_DISCARD: 1448 case IPSEC_POLICY_NONE: 1449 case IPSEC_POLICY_ENTRUST: 1450 case IPSEC_POLICY_BYPASS: 1451 newsp->req = NULL; 1452 break; 1453 1454 case IPSEC_POLICY_IPSEC: 1455 { 1456 int tlen; 1457 const struct sadb_x_ipsecrequest *xisr; 1458 uint16_t xisr_reqid; 1459 struct ipsecrequest **p_isr = &newsp->req; 1460 1461 /* validity check */ 1462 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1463 ipseclog((LOG_DEBUG, 1464 "key_msg2sp: Invalid msg length.\n")); 1465 KEY_FREESP(&newsp); 1466 *error = EINVAL; 1467 return NULL; 1468 } 1469 1470 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1471 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1472 1473 while (tlen > 0) { 1474 /* length check */ 1475 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1476 ipseclog((LOG_DEBUG, "key_msg2sp: " 1477 "invalid ipsecrequest length.\n")); 1478 KEY_FREESP(&newsp); 1479 *error = EINVAL; 1480 return NULL; 1481 } 1482 1483 /* allocate request buffer */ 1484 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); 1485 if ((*p_isr) == NULL) { 1486 ipseclog((LOG_DEBUG, 1487 "key_msg2sp: No more memory.\n")); 1488 KEY_FREESP(&newsp); 1489 *error = ENOBUFS; 1490 return NULL; 1491 } 1492 memset(*p_isr, 0, sizeof(**p_isr)); 1493 1494 /* set values */ 1495 (*p_isr)->next = NULL; 1496 1497 switch (xisr->sadb_x_ipsecrequest_proto) { 1498 case IPPROTO_ESP: 1499 case IPPROTO_AH: 1500 case IPPROTO_IPCOMP: 1501 break; 1502 default: 1503 ipseclog((LOG_DEBUG, 1504 "key_msg2sp: invalid proto type=%u\n", 1505 xisr->sadb_x_ipsecrequest_proto)); 1506 KEY_FREESP(&newsp); 1507 *error = EPROTONOSUPPORT; 1508 return NULL; 1509 } 1510 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1511 1512 switch (xisr->sadb_x_ipsecrequest_mode) { 1513 case IPSEC_MODE_TRANSPORT: 1514 case IPSEC_MODE_TUNNEL: 1515 break; 1516 case IPSEC_MODE_ANY: 1517 default: 1518 ipseclog((LOG_DEBUG, 1519 "key_msg2sp: invalid mode=%u\n", 1520 xisr->sadb_x_ipsecrequest_mode)); 1521 KEY_FREESP(&newsp); 1522 *error = EINVAL; 1523 return NULL; 1524 } 1525 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1526 1527 switch (xisr->sadb_x_ipsecrequest_level) { 1528 case IPSEC_LEVEL_DEFAULT: 1529 case IPSEC_LEVEL_USE: 1530 case IPSEC_LEVEL_REQUIRE: 1531 break; 1532 case IPSEC_LEVEL_UNIQUE: 1533 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1534 /* validity check */ 1535 /* 1536 * If range violation of reqid, kernel will 1537 * update it, don't refuse it. 1538 */ 1539 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1540 ipseclog((LOG_DEBUG, 1541 "key_msg2sp: reqid=%d range " 1542 "violation, updated by kernel.\n", 1543 xisr_reqid)); 1544 xisr_reqid = 0; 1545 } 1546 1547 /* allocate new reqid id if reqid is zero. */ 1548 if (xisr_reqid == 0) { 1549 u_int16_t reqid; 1550 if ((reqid = key_newreqid()) == 0) { 1551 KEY_FREESP(&newsp); 1552 *error = ENOBUFS; 1553 return NULL; 1554 } 1555 (*p_isr)->saidx.reqid = reqid; 1556 } else { 1557 /* set it for manual keying. */ 1558 (*p_isr)->saidx.reqid = xisr_reqid; 1559 } 1560 break; 1561 1562 default: 1563 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1564 xisr->sadb_x_ipsecrequest_level)); 1565 KEY_FREESP(&newsp); 1566 *error = EINVAL; 1567 return NULL; 1568 } 1569 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1570 1571 /* set IP addresses if there */ 1572 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1573 const struct sockaddr *paddr; 1574 1575 paddr = (const struct sockaddr *)(xisr + 1); 1576 1577 /* validity check */ 1578 if (paddr->sa_len 1579 > sizeof((*p_isr)->saidx.src)) { 1580 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1581 "address length.\n")); 1582 KEY_FREESP(&newsp); 1583 *error = EINVAL; 1584 return NULL; 1585 } 1586 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1587 1588 paddr = (const struct sockaddr *)((const char *)paddr 1589 + paddr->sa_len); 1590 1591 /* validity check */ 1592 if (paddr->sa_len 1593 > sizeof((*p_isr)->saidx.dst)) { 1594 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1595 "address length.\n")); 1596 KEY_FREESP(&newsp); 1597 *error = EINVAL; 1598 return NULL; 1599 } 1600 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1601 } 1602 1603 (*p_isr)->sav = NULL; 1604 (*p_isr)->sp = newsp; 1605 1606 /* initialization for the next. */ 1607 p_isr = &(*p_isr)->next; 1608 tlen -= xisr->sadb_x_ipsecrequest_len; 1609 1610 /* validity check */ 1611 if (tlen < 0) { 1612 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1613 KEY_FREESP(&newsp); 1614 *error = EINVAL; 1615 return NULL; 1616 } 1617 1618 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr 1619 + xisr->sadb_x_ipsecrequest_len); 1620 } 1621 } 1622 break; 1623 default: 1624 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1625 KEY_FREESP(&newsp); 1626 *error = EINVAL; 1627 return NULL; 1628 } 1629 1630 *error = 0; 1631 return newsp; 1632 } 1633 1634 static u_int16_t 1635 key_newreqid(void) 1636 { 1637 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1638 1639 auto_reqid = (auto_reqid == 0xffff 1640 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1641 1642 /* XXX should be unique check */ 1643 1644 return auto_reqid; 1645 } 1646 1647 /* 1648 * copy secpolicy struct to sadb_x_policy structure indicated. 1649 */ 1650 struct mbuf * 1651 key_sp2msg(const struct secpolicy *sp) 1652 { 1653 struct sadb_x_policy *xpl; 1654 int tlen; 1655 char *p; 1656 struct mbuf *m; 1657 1658 /* sanity check. */ 1659 if (sp == NULL) 1660 panic("key_sp2msg: NULL pointer was passed"); 1661 1662 tlen = key_getspreqmsglen(sp); 1663 1664 m = key_alloc_mbuf(tlen); 1665 if (!m || m->m_next) { /*XXX*/ 1666 if (m) 1667 m_freem(m); 1668 return NULL; 1669 } 1670 1671 m->m_len = tlen; 1672 m->m_next = NULL; 1673 xpl = mtod(m, struct sadb_x_policy *); 1674 memset(xpl, 0, tlen); 1675 1676 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1677 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1678 xpl->sadb_x_policy_type = sp->policy; 1679 xpl->sadb_x_policy_dir = sp->spidx.dir; 1680 xpl->sadb_x_policy_id = sp->id; 1681 p = (char *)xpl + sizeof(*xpl); 1682 1683 /* if is the policy for ipsec ? */ 1684 if (sp->policy == IPSEC_POLICY_IPSEC) { 1685 struct sadb_x_ipsecrequest *xisr; 1686 struct ipsecrequest *isr; 1687 1688 for (isr = sp->req; isr != NULL; isr = isr->next) { 1689 1690 xisr = (struct sadb_x_ipsecrequest *)p; 1691 1692 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1693 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1694 xisr->sadb_x_ipsecrequest_level = isr->level; 1695 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1696 1697 p += sizeof(*xisr); 1698 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1699 p += isr->saidx.src.sa.sa_len; 1700 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1701 p += isr->saidx.src.sa.sa_len; 1702 1703 xisr->sadb_x_ipsecrequest_len = 1704 PFKEY_ALIGN8(sizeof(*xisr) 1705 + isr->saidx.src.sa.sa_len 1706 + isr->saidx.dst.sa.sa_len); 1707 } 1708 } 1709 1710 return m; 1711 } 1712 1713 /* m will not be freed nor modified */ 1714 static struct mbuf * 1715 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1716 int ndeep, int nitem, ...) 1717 { 1718 va_list ap; 1719 int idx; 1720 int i; 1721 struct mbuf *result = NULL, *n; 1722 int len; 1723 1724 if (m == NULL || mhp == NULL) 1725 panic("null pointer passed to key_gather"); 1726 1727 va_start(ap, nitem); 1728 for (i = 0; i < nitem; i++) { 1729 idx = va_arg(ap, int); 1730 if (idx < 0 || idx > SADB_EXT_MAX) 1731 goto fail; 1732 /* don't attempt to pull empty extension */ 1733 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1734 continue; 1735 if (idx != SADB_EXT_RESERVED && 1736 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1737 continue; 1738 1739 if (idx == SADB_EXT_RESERVED) { 1740 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1741 #ifdef DIAGNOSTIC 1742 if (len > MHLEN) 1743 panic("assumption failed"); 1744 #endif 1745 MGETHDR(n, M_DONTWAIT, MT_DATA); 1746 if (!n) 1747 goto fail; 1748 n->m_len = len; 1749 n->m_next = NULL; 1750 m_copydata(m, 0, sizeof(struct sadb_msg), 1751 mtod(n, void *)); 1752 } else if (i < ndeep) { 1753 len = mhp->extlen[idx]; 1754 n = key_alloc_mbuf(len); 1755 if (!n || n->m_next) { /*XXX*/ 1756 if (n) 1757 m_freem(n); 1758 goto fail; 1759 } 1760 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1761 mtod(n, void *)); 1762 } else { 1763 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1764 M_DONTWAIT); 1765 } 1766 if (n == NULL) 1767 goto fail; 1768 1769 if (result) 1770 m_cat(result, n); 1771 else 1772 result = n; 1773 } 1774 va_end(ap); 1775 1776 if (result && (result->m_flags & M_PKTHDR) != 0) { 1777 result->m_pkthdr.len = 0; 1778 for (n = result; n; n = n->m_next) 1779 result->m_pkthdr.len += n->m_len; 1780 } 1781 1782 return result; 1783 1784 fail: 1785 va_end(ap); 1786 m_freem(result); 1787 return NULL; 1788 } 1789 1790 /* 1791 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1792 * add an entry to SP database, when received 1793 * <base, address(SD), (lifetime(H),) policy> 1794 * from the user(?). 1795 * Adding to SP database, 1796 * and send 1797 * <base, address(SD), (lifetime(H),) policy> 1798 * to the socket which was send. 1799 * 1800 * SPDADD set a unique policy entry. 1801 * SPDSETIDX like SPDADD without a part of policy requests. 1802 * SPDUPDATE replace a unique policy entry. 1803 * 1804 * m will always be freed. 1805 */ 1806 static int 1807 key_spdadd(struct socket *so, struct mbuf *m, 1808 const struct sadb_msghdr *mhp) 1809 { 1810 const struct sadb_address *src0, *dst0; 1811 const struct sadb_x_policy *xpl0; 1812 struct sadb_x_policy *xpl; 1813 const struct sadb_lifetime *lft = NULL; 1814 struct secpolicyindex spidx; 1815 struct secpolicy *newsp; 1816 int error; 1817 1818 /* sanity check */ 1819 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 1820 panic("key_spdadd: NULL pointer is passed"); 1821 1822 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1823 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1824 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1825 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1826 return key_senderror(so, m, EINVAL); 1827 } 1828 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1829 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1830 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1831 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1832 return key_senderror(so, m, EINVAL); 1833 } 1834 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1835 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1836 < sizeof(struct sadb_lifetime)) { 1837 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1838 return key_senderror(so, m, EINVAL); 1839 } 1840 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1841 } 1842 1843 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1844 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1845 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1846 1847 /* make secindex */ 1848 /* XXX boundary check against sa_len */ 1849 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1850 src0 + 1, 1851 dst0 + 1, 1852 src0->sadb_address_prefixlen, 1853 dst0->sadb_address_prefixlen, 1854 src0->sadb_address_proto, 1855 &spidx); 1856 1857 /* checking the direciton. */ 1858 switch (xpl0->sadb_x_policy_dir) { 1859 case IPSEC_DIR_INBOUND: 1860 case IPSEC_DIR_OUTBOUND: 1861 break; 1862 default: 1863 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1864 mhp->msg->sadb_msg_errno = EINVAL; 1865 return 0; 1866 } 1867 1868 /* check policy */ 1869 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1870 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1871 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1872 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1873 return key_senderror(so, m, EINVAL); 1874 } 1875 1876 /* policy requests are mandatory when action is ipsec. */ 1877 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1878 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1879 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1880 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1881 return key_senderror(so, m, EINVAL); 1882 } 1883 1884 /* 1885 * checking there is SP already or not. 1886 * SPDUPDATE doesn't depend on whether there is a SP or not. 1887 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1888 * then error. 1889 */ 1890 newsp = key_getsp(&spidx); 1891 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1892 if (newsp) { 1893 key_sp_dead(newsp); 1894 key_sp_unlink(newsp); /* XXX jrs ordering */ 1895 KEY_FREESP(&newsp); 1896 newsp = NULL; 1897 } 1898 } else { 1899 if (newsp != NULL) { 1900 KEY_FREESP(&newsp); 1901 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1902 return key_senderror(so, m, EEXIST); 1903 } 1904 } 1905 1906 /* allocation new SP entry */ 1907 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1908 return key_senderror(so, m, error); 1909 } 1910 1911 if ((newsp->id = key_getnewspid()) == 0) { 1912 KFREE(newsp); 1913 return key_senderror(so, m, ENOBUFS); 1914 } 1915 1916 /* XXX boundary check against sa_len */ 1917 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1918 src0 + 1, 1919 dst0 + 1, 1920 src0->sadb_address_prefixlen, 1921 dst0->sadb_address_prefixlen, 1922 src0->sadb_address_proto, 1923 &newsp->spidx); 1924 1925 /* sanity check on addr pair */ 1926 if (((const struct sockaddr *)(src0 + 1))->sa_family != 1927 ((const struct sockaddr *)(dst0+ 1))->sa_family) { 1928 KFREE(newsp); 1929 return key_senderror(so, m, EINVAL); 1930 } 1931 if (((const struct sockaddr *)(src0 + 1))->sa_len != 1932 ((const struct sockaddr *)(dst0+ 1))->sa_len) { 1933 KFREE(newsp); 1934 return key_senderror(so, m, EINVAL); 1935 } 1936 1937 newsp->created = time_uptime; 1938 newsp->lastused = newsp->created; 1939 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1940 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1941 1942 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1943 newsp->state = IPSEC_SPSTATE_ALIVE; 1944 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1945 1946 /* delete the entry in spacqtree */ 1947 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1948 struct secspacq *spacq; 1949 if ((spacq = key_getspacq(&spidx)) != NULL) { 1950 /* reset counter in order to deletion by timehandler. */ 1951 spacq->created = time_uptime; 1952 spacq->count = 0; 1953 } 1954 } 1955 1956 #if defined(__NetBSD__) 1957 /* Invalidate all cached SPD pointers in the PCBs. */ 1958 ipsec_invalpcbcacheall(); 1959 1960 #if defined(GATEWAY) 1961 /* Invalidate the ipflow cache, as well. */ 1962 ipflow_invalidate_all(0); 1963 #ifdef INET6 1964 ip6flow_invalidate_all(0); 1965 #endif /* INET6 */ 1966 #endif /* GATEWAY */ 1967 #endif /* __NetBSD__ */ 1968 1969 { 1970 struct mbuf *n, *mpolicy; 1971 struct sadb_msg *newmsg; 1972 int off; 1973 1974 /* create new sadb_msg to reply. */ 1975 if (lft) { 1976 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1977 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1978 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1979 } else { 1980 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1981 SADB_X_EXT_POLICY, 1982 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1983 } 1984 if (!n) 1985 return key_senderror(so, m, ENOBUFS); 1986 1987 if (n->m_len < sizeof(*newmsg)) { 1988 n = m_pullup(n, sizeof(*newmsg)); 1989 if (!n) 1990 return key_senderror(so, m, ENOBUFS); 1991 } 1992 newmsg = mtod(n, struct sadb_msg *); 1993 newmsg->sadb_msg_errno = 0; 1994 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1995 1996 off = 0; 1997 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1998 sizeof(*xpl), &off); 1999 if (mpolicy == NULL) { 2000 /* n is already freed */ 2001 return key_senderror(so, m, ENOBUFS); 2002 } 2003 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2004 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2005 m_freem(n); 2006 return key_senderror(so, m, EINVAL); 2007 } 2008 xpl->sadb_x_policy_id = newsp->id; 2009 2010 m_freem(m); 2011 key_update_used(); 2012 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2013 } 2014 } 2015 2016 /* 2017 * get new policy id. 2018 * OUT: 2019 * 0: failure. 2020 * others: success. 2021 */ 2022 static u_int32_t 2023 key_getnewspid(void) 2024 { 2025 u_int32_t newid = 0; 2026 int count = key_spi_trycnt; /* XXX */ 2027 struct secpolicy *sp; 2028 2029 /* when requesting to allocate spi ranged */ 2030 while (count--) { 2031 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2032 2033 if ((sp = key_getspbyid(newid)) == NULL) 2034 break; 2035 2036 KEY_FREESP(&sp); 2037 } 2038 2039 if (count == 0 || newid == 0) { 2040 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2041 return 0; 2042 } 2043 2044 return newid; 2045 } 2046 2047 /* 2048 * SADB_SPDDELETE processing 2049 * receive 2050 * <base, address(SD), policy(*)> 2051 * from the user(?), and set SADB_SASTATE_DEAD, 2052 * and send, 2053 * <base, address(SD), policy(*)> 2054 * to the ikmpd. 2055 * policy(*) including direction of policy. 2056 * 2057 * m will always be freed. 2058 */ 2059 static int 2060 key_spddelete(struct socket *so, struct mbuf *m, 2061 const struct sadb_msghdr *mhp) 2062 { 2063 struct sadb_address *src0, *dst0; 2064 struct sadb_x_policy *xpl0; 2065 struct secpolicyindex spidx; 2066 struct secpolicy *sp; 2067 2068 /* sanity check */ 2069 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2070 panic("key_spddelete: NULL pointer is passed"); 2071 2072 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2073 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2074 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2075 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2076 return key_senderror(so, m, EINVAL); 2077 } 2078 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2079 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2080 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2081 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2082 return key_senderror(so, m, EINVAL); 2083 } 2084 2085 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2086 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2087 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2088 2089 /* make secindex */ 2090 /* XXX boundary check against sa_len */ 2091 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2092 src0 + 1, 2093 dst0 + 1, 2094 src0->sadb_address_prefixlen, 2095 dst0->sadb_address_prefixlen, 2096 src0->sadb_address_proto, 2097 &spidx); 2098 2099 /* checking the direciton. */ 2100 switch (xpl0->sadb_x_policy_dir) { 2101 case IPSEC_DIR_INBOUND: 2102 case IPSEC_DIR_OUTBOUND: 2103 break; 2104 default: 2105 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2106 return key_senderror(so, m, EINVAL); 2107 } 2108 2109 /* Is there SP in SPD ? */ 2110 if ((sp = key_getsp(&spidx)) == NULL) { 2111 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2112 return key_senderror(so, m, EINVAL); 2113 } 2114 2115 /* save policy id to buffer to be returned. */ 2116 xpl0->sadb_x_policy_id = sp->id; 2117 2118 key_sp_dead(sp); 2119 key_sp_unlink(sp); /* XXX jrs ordering */ 2120 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2121 2122 #if defined(__NetBSD__) 2123 /* Invalidate all cached SPD pointers in the PCBs. */ 2124 ipsec_invalpcbcacheall(); 2125 2126 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2127 #endif /* __NetBSD__ */ 2128 2129 { 2130 struct mbuf *n; 2131 struct sadb_msg *newmsg; 2132 2133 /* create new sadb_msg to reply. */ 2134 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2135 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2136 if (!n) 2137 return key_senderror(so, m, ENOBUFS); 2138 2139 newmsg = mtod(n, struct sadb_msg *); 2140 newmsg->sadb_msg_errno = 0; 2141 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2142 2143 m_freem(m); 2144 key_update_used(); 2145 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2146 } 2147 } 2148 2149 /* 2150 * SADB_SPDDELETE2 processing 2151 * receive 2152 * <base, policy(*)> 2153 * from the user(?), and set SADB_SASTATE_DEAD, 2154 * and send, 2155 * <base, policy(*)> 2156 * to the ikmpd. 2157 * policy(*) including direction of policy. 2158 * 2159 * m will always be freed. 2160 */ 2161 static int 2162 key_spddelete2(struct socket *so, struct mbuf *m, 2163 const struct sadb_msghdr *mhp) 2164 { 2165 u_int32_t id; 2166 struct secpolicy *sp; 2167 2168 /* sanity check */ 2169 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2170 panic("key_spddelete2: NULL pointer is passed"); 2171 2172 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2173 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2174 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2175 key_senderror(so, m, EINVAL); 2176 return 0; 2177 } 2178 2179 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2180 2181 /* Is there SP in SPD ? */ 2182 if ((sp = key_getspbyid(id)) == NULL) { 2183 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2184 return key_senderror(so, m, EINVAL); 2185 } 2186 2187 key_sp_dead(sp); 2188 key_sp_unlink(sp); /* XXX jrs ordering */ 2189 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2190 sp = NULL; 2191 2192 #if defined(__NetBSD__) 2193 /* Invalidate all cached SPD pointers in the PCBs. */ 2194 ipsec_invalpcbcacheall(); 2195 2196 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2197 #endif /* __NetBSD__ */ 2198 2199 { 2200 struct mbuf *n, *nn; 2201 struct sadb_msg *newmsg; 2202 int off, len; 2203 2204 /* create new sadb_msg to reply. */ 2205 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2206 2207 if (len > MCLBYTES) 2208 return key_senderror(so, m, ENOBUFS); 2209 MGETHDR(n, M_DONTWAIT, MT_DATA); 2210 if (n && len > MHLEN) { 2211 MCLGET(n, M_DONTWAIT); 2212 if ((n->m_flags & M_EXT) == 0) { 2213 m_freem(n); 2214 n = NULL; 2215 } 2216 } 2217 if (!n) 2218 return key_senderror(so, m, ENOBUFS); 2219 2220 n->m_len = len; 2221 n->m_next = NULL; 2222 off = 0; 2223 2224 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2225 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2226 2227 #ifdef DIAGNOSTIC 2228 if (off != len) 2229 panic("length inconsistency in key_spddelete2"); 2230 #endif 2231 2232 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2233 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2234 if (!n->m_next) { 2235 m_freem(n); 2236 return key_senderror(so, m, ENOBUFS); 2237 } 2238 2239 n->m_pkthdr.len = 0; 2240 for (nn = n; nn; nn = nn->m_next) 2241 n->m_pkthdr.len += nn->m_len; 2242 2243 newmsg = mtod(n, struct sadb_msg *); 2244 newmsg->sadb_msg_errno = 0; 2245 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2246 2247 m_freem(m); 2248 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2249 } 2250 } 2251 2252 /* 2253 * SADB_X_GET processing 2254 * receive 2255 * <base, policy(*)> 2256 * from the user(?), 2257 * and send, 2258 * <base, address(SD), policy> 2259 * to the ikmpd. 2260 * policy(*) including direction of policy. 2261 * 2262 * m will always be freed. 2263 */ 2264 static int 2265 key_spdget(struct socket *so, struct mbuf *m, 2266 const struct sadb_msghdr *mhp) 2267 { 2268 u_int32_t id; 2269 struct secpolicy *sp; 2270 struct mbuf *n; 2271 2272 /* sanity check */ 2273 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2274 panic("key_spdget: NULL pointer is passed"); 2275 2276 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2277 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2278 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2279 return key_senderror(so, m, EINVAL); 2280 } 2281 2282 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2283 2284 /* Is there SP in SPD ? */ 2285 if ((sp = key_getspbyid(id)) == NULL) { 2286 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2287 return key_senderror(so, m, ENOENT); 2288 } 2289 2290 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2291 mhp->msg->sadb_msg_pid); 2292 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2293 if (n != NULL) { 2294 m_freem(m); 2295 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2296 } else 2297 return key_senderror(so, m, ENOBUFS); 2298 } 2299 2300 /* 2301 * SADB_X_SPDACQUIRE processing. 2302 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2303 * send 2304 * <base, policy(*)> 2305 * to KMD, and expect to receive 2306 * <base> with SADB_X_SPDACQUIRE if error occurred, 2307 * or 2308 * <base, policy> 2309 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2310 * policy(*) is without policy requests. 2311 * 2312 * 0 : succeed 2313 * others: error number 2314 */ 2315 int 2316 key_spdacquire(const struct secpolicy *sp) 2317 { 2318 struct mbuf *result = NULL, *m; 2319 struct secspacq *newspacq; 2320 int error; 2321 2322 /* sanity check */ 2323 if (sp == NULL) 2324 panic("key_spdacquire: NULL pointer is passed"); 2325 if (sp->req != NULL) 2326 panic("key_spdacquire: called but there is request"); 2327 if (sp->policy != IPSEC_POLICY_IPSEC) 2328 panic("key_spdacquire: policy mismathed. IPsec is expected"); 2329 2330 /* Get an entry to check whether sent message or not. */ 2331 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2332 if (key_blockacq_count < newspacq->count) { 2333 /* reset counter and do send message. */ 2334 newspacq->count = 0; 2335 } else { 2336 /* increment counter and do nothing. */ 2337 newspacq->count++; 2338 return 0; 2339 } 2340 } else { 2341 /* make new entry for blocking to send SADB_ACQUIRE. */ 2342 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2343 return ENOBUFS; 2344 2345 /* add to acqtree */ 2346 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2347 } 2348 2349 /* create new sadb_msg to reply. */ 2350 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2351 if (!m) { 2352 error = ENOBUFS; 2353 goto fail; 2354 } 2355 result = m; 2356 2357 result->m_pkthdr.len = 0; 2358 for (m = result; m; m = m->m_next) 2359 result->m_pkthdr.len += m->m_len; 2360 2361 mtod(result, struct sadb_msg *)->sadb_msg_len = 2362 PFKEY_UNIT64(result->m_pkthdr.len); 2363 2364 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2365 2366 fail: 2367 if (result) 2368 m_freem(result); 2369 return error; 2370 } 2371 2372 /* 2373 * SADB_SPDFLUSH processing 2374 * receive 2375 * <base> 2376 * from the user, and free all entries in secpctree. 2377 * and send, 2378 * <base> 2379 * to the user. 2380 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2381 * 2382 * m will always be freed. 2383 */ 2384 static int 2385 key_spdflush(struct socket *so, struct mbuf *m, 2386 const struct sadb_msghdr *mhp) 2387 { 2388 struct sadb_msg *newmsg; 2389 struct secpolicy *sp; 2390 u_int dir; 2391 2392 /* sanity check */ 2393 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2394 panic("key_spdflush: NULL pointer is passed"); 2395 2396 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2397 return key_senderror(so, m, EINVAL); 2398 2399 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2400 struct secpolicy * nextsp; 2401 for (sp = LIST_FIRST(&sptree[dir]); 2402 sp != NULL; 2403 sp = nextsp) { 2404 2405 nextsp = LIST_NEXT(sp, chain); 2406 if (sp->state == IPSEC_SPSTATE_DEAD) 2407 continue; 2408 key_sp_dead(sp); 2409 key_sp_unlink(sp); 2410 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2411 continue; 2412 } 2413 } 2414 2415 #if defined(__NetBSD__) 2416 /* Invalidate all cached SPD pointers in the PCBs. */ 2417 ipsec_invalpcbcacheall(); 2418 2419 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2420 #endif /* __NetBSD__ */ 2421 2422 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2423 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2424 return key_senderror(so, m, ENOBUFS); 2425 } 2426 2427 if (m->m_next) 2428 m_freem(m->m_next); 2429 m->m_next = NULL; 2430 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2431 newmsg = mtod(m, struct sadb_msg *); 2432 newmsg->sadb_msg_errno = 0; 2433 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2434 2435 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2436 } 2437 2438 static struct sockaddr key_src = { 2439 .sa_len = 2, 2440 .sa_family = PF_KEY, 2441 }; 2442 2443 static struct mbuf * 2444 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2445 { 2446 struct secpolicy *sp; 2447 int cnt; 2448 u_int dir; 2449 struct mbuf *m, *n, *prev; 2450 int totlen; 2451 2452 *lenp = 0; 2453 2454 /* search SPD entry and get buffer size. */ 2455 cnt = 0; 2456 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2457 LIST_FOREACH(sp, &sptree[dir], chain) { 2458 cnt++; 2459 } 2460 } 2461 2462 if (cnt == 0) { 2463 *errorp = ENOENT; 2464 return (NULL); 2465 } 2466 2467 m = NULL; 2468 prev = m; 2469 totlen = 0; 2470 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2471 LIST_FOREACH(sp, &sptree[dir], chain) { 2472 --cnt; 2473 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2474 2475 if (!n) { 2476 *errorp = ENOBUFS; 2477 if (m) m_freem(m); 2478 return (NULL); 2479 } 2480 2481 totlen += n->m_pkthdr.len; 2482 if (!m) { 2483 m = n; 2484 } else { 2485 prev->m_nextpkt = n; 2486 } 2487 prev = n; 2488 } 2489 } 2490 2491 *lenp = totlen; 2492 *errorp = 0; 2493 return (m); 2494 } 2495 2496 /* 2497 * SADB_SPDDUMP processing 2498 * receive 2499 * <base> 2500 * from the user, and dump all SP leaves 2501 * and send, 2502 * <base> ..... 2503 * to the ikmpd. 2504 * 2505 * m will always be freed. 2506 */ 2507 static int 2508 key_spddump(struct socket *so, struct mbuf *m0, 2509 const struct sadb_msghdr *mhp) 2510 { 2511 struct mbuf *n; 2512 int error, len; 2513 int ok, s; 2514 pid_t pid; 2515 2516 /* sanity check */ 2517 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 2518 panic("key_spddump: NULL pointer is passed"); 2519 2520 2521 pid = mhp->msg->sadb_msg_pid; 2522 /* 2523 * If the requestor has insufficient socket-buffer space 2524 * for the entire chain, nobody gets any response to the DUMP. 2525 * XXX For now, only the requestor ever gets anything. 2526 * Moreover, if the requestor has any space at all, they receive 2527 * the entire chain, otherwise the request is refused with ENOBUFS. 2528 */ 2529 if (sbspace(&so->so_rcv) <= 0) { 2530 return key_senderror(so, m0, ENOBUFS); 2531 } 2532 2533 s = splsoftnet(); 2534 n = key_setspddump_chain(&error, &len, pid); 2535 splx(s); 2536 2537 if (n == NULL) { 2538 return key_senderror(so, m0, ENOENT); 2539 } 2540 { 2541 uint64_t *ps = PFKEY_STAT_GETREF(); 2542 ps[PFKEY_STAT_IN_TOTAL]++; 2543 ps[PFKEY_STAT_IN_BYTES] += len; 2544 PFKEY_STAT_PUTREF(); 2545 } 2546 2547 /* 2548 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2549 * The requestor receives either the entire chain, or an 2550 * error message with ENOBUFS. 2551 */ 2552 2553 /* 2554 * sbappendchainwith record takes the chain of entries, one 2555 * packet-record per SPD entry, prepends the key_src sockaddr 2556 * to each packet-record, links the sockaddr mbufs into a new 2557 * list of records, then appends the entire resulting 2558 * list to the requesting socket. 2559 */ 2560 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2561 n, SB_PRIO_ONESHOT_OVERFLOW); 2562 2563 if (!ok) { 2564 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2565 m_freem(n); 2566 return key_senderror(so, m0, ENOBUFS); 2567 } 2568 2569 m_freem(m0); 2570 return error; 2571 } 2572 2573 /* 2574 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2575 */ 2576 static int 2577 key_nat_map(struct socket *so, struct mbuf *m, 2578 const struct sadb_msghdr *mhp) 2579 { 2580 struct sadb_x_nat_t_type *type; 2581 struct sadb_x_nat_t_port *sport; 2582 struct sadb_x_nat_t_port *dport; 2583 struct sadb_address *iaddr, *raddr; 2584 struct sadb_x_nat_t_frag *frag; 2585 2586 /* sanity check */ 2587 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2588 panic("key_nat_map: NULL pointer is passed."); 2589 2590 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2591 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2592 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2593 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2594 return key_senderror(so, m, EINVAL); 2595 } 2596 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2597 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2598 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2599 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2600 return key_senderror(so, m, EINVAL); 2601 } 2602 2603 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2604 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2605 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2606 return key_senderror(so, m, EINVAL); 2607 } 2608 2609 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2610 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2611 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2612 return key_senderror(so, m, EINVAL); 2613 } 2614 2615 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2616 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2617 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2618 return key_senderror(so, m, EINVAL); 2619 } 2620 2621 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2622 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2623 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2624 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2625 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2626 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2627 2628 /* 2629 * XXX handle that, it should also contain a SA, or anything 2630 * that enable to update the SA information. 2631 */ 2632 2633 return 0; 2634 } 2635 2636 static struct mbuf * 2637 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2638 { 2639 struct mbuf *result = NULL, *m; 2640 2641 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2642 if (!m) 2643 goto fail; 2644 result = m; 2645 2646 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2647 &sp->spidx.src.sa, sp->spidx.prefs, 2648 sp->spidx.ul_proto); 2649 if (!m) 2650 goto fail; 2651 m_cat(result, m); 2652 2653 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2654 &sp->spidx.dst.sa, sp->spidx.prefd, 2655 sp->spidx.ul_proto); 2656 if (!m) 2657 goto fail; 2658 m_cat(result, m); 2659 2660 m = key_sp2msg(sp); 2661 if (!m) 2662 goto fail; 2663 m_cat(result, m); 2664 2665 if ((result->m_flags & M_PKTHDR) == 0) 2666 goto fail; 2667 2668 if (result->m_len < sizeof(struct sadb_msg)) { 2669 result = m_pullup(result, sizeof(struct sadb_msg)); 2670 if (result == NULL) 2671 goto fail; 2672 } 2673 2674 result->m_pkthdr.len = 0; 2675 for (m = result; m; m = m->m_next) 2676 result->m_pkthdr.len += m->m_len; 2677 2678 mtod(result, struct sadb_msg *)->sadb_msg_len = 2679 PFKEY_UNIT64(result->m_pkthdr.len); 2680 2681 return result; 2682 2683 fail: 2684 m_freem(result); 2685 return NULL; 2686 } 2687 2688 /* 2689 * get PFKEY message length for security policy and request. 2690 */ 2691 static u_int 2692 key_getspreqmsglen(const struct secpolicy *sp) 2693 { 2694 u_int tlen; 2695 2696 tlen = sizeof(struct sadb_x_policy); 2697 2698 /* if is the policy for ipsec ? */ 2699 if (sp->policy != IPSEC_POLICY_IPSEC) 2700 return tlen; 2701 2702 /* get length of ipsec requests */ 2703 { 2704 const struct ipsecrequest *isr; 2705 int len; 2706 2707 for (isr = sp->req; isr != NULL; isr = isr->next) { 2708 len = sizeof(struct sadb_x_ipsecrequest) 2709 + isr->saidx.src.sa.sa_len 2710 + isr->saidx.dst.sa.sa_len; 2711 2712 tlen += PFKEY_ALIGN8(len); 2713 } 2714 } 2715 2716 return tlen; 2717 } 2718 2719 /* 2720 * SADB_SPDEXPIRE processing 2721 * send 2722 * <base, address(SD), lifetime(CH), policy> 2723 * to KMD by PF_KEY. 2724 * 2725 * OUT: 0 : succeed 2726 * others : error number 2727 */ 2728 static int 2729 key_spdexpire(struct secpolicy *sp) 2730 { 2731 int s; 2732 struct mbuf *result = NULL, *m; 2733 int len; 2734 int error = -1; 2735 struct sadb_lifetime *lt; 2736 2737 /* XXX: Why do we lock ? */ 2738 s = splsoftnet(); /*called from softclock()*/ 2739 2740 /* sanity check */ 2741 if (sp == NULL) 2742 panic("key_spdexpire: NULL pointer is passed"); 2743 2744 /* set msg header */ 2745 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2746 if (!m) { 2747 error = ENOBUFS; 2748 goto fail; 2749 } 2750 result = m; 2751 2752 /* create lifetime extension (current and hard) */ 2753 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2754 m = key_alloc_mbuf(len); 2755 if (!m || m->m_next) { /*XXX*/ 2756 if (m) 2757 m_freem(m); 2758 error = ENOBUFS; 2759 goto fail; 2760 } 2761 memset(mtod(m, void *), 0, len); 2762 lt = mtod(m, struct sadb_lifetime *); 2763 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2764 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2765 lt->sadb_lifetime_allocations = 0; 2766 lt->sadb_lifetime_bytes = 0; 2767 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2768 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2769 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2770 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2771 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2772 lt->sadb_lifetime_allocations = 0; 2773 lt->sadb_lifetime_bytes = 0; 2774 lt->sadb_lifetime_addtime = sp->lifetime; 2775 lt->sadb_lifetime_usetime = sp->validtime; 2776 m_cat(result, m); 2777 2778 /* set sadb_address for source */ 2779 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2780 &sp->spidx.src.sa, 2781 sp->spidx.prefs, sp->spidx.ul_proto); 2782 if (!m) { 2783 error = ENOBUFS; 2784 goto fail; 2785 } 2786 m_cat(result, m); 2787 2788 /* set sadb_address for destination */ 2789 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2790 &sp->spidx.dst.sa, 2791 sp->spidx.prefd, sp->spidx.ul_proto); 2792 if (!m) { 2793 error = ENOBUFS; 2794 goto fail; 2795 } 2796 m_cat(result, m); 2797 2798 /* set secpolicy */ 2799 m = key_sp2msg(sp); 2800 if (!m) { 2801 error = ENOBUFS; 2802 goto fail; 2803 } 2804 m_cat(result, m); 2805 2806 if ((result->m_flags & M_PKTHDR) == 0) { 2807 error = EINVAL; 2808 goto fail; 2809 } 2810 2811 if (result->m_len < sizeof(struct sadb_msg)) { 2812 result = m_pullup(result, sizeof(struct sadb_msg)); 2813 if (result == NULL) { 2814 error = ENOBUFS; 2815 goto fail; 2816 } 2817 } 2818 2819 result->m_pkthdr.len = 0; 2820 for (m = result; m; m = m->m_next) 2821 result->m_pkthdr.len += m->m_len; 2822 2823 mtod(result, struct sadb_msg *)->sadb_msg_len = 2824 PFKEY_UNIT64(result->m_pkthdr.len); 2825 2826 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2827 2828 fail: 2829 if (result) 2830 m_freem(result); 2831 splx(s); 2832 return error; 2833 } 2834 2835 /* %%% SAD management */ 2836 /* 2837 * allocating a memory for new SA head, and copy from the values of mhp. 2838 * OUT: NULL : failure due to the lack of memory. 2839 * others : pointer to new SA head. 2840 */ 2841 static struct secashead * 2842 key_newsah(const struct secasindex *saidx) 2843 { 2844 struct secashead *newsah; 2845 2846 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx")); 2847 2848 newsah = (struct secashead *) 2849 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2850 if (newsah != NULL) { 2851 int i; 2852 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2853 LIST_INIT(&newsah->savtree[i]); 2854 newsah->saidx = *saidx; 2855 2856 /* add to saidxtree */ 2857 newsah->state = SADB_SASTATE_MATURE; 2858 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2859 } 2860 return(newsah); 2861 } 2862 2863 /* 2864 * delete SA index and all SA registerd. 2865 */ 2866 static void 2867 key_delsah(struct secashead *sah) 2868 { 2869 struct secasvar *sav, *nextsav; 2870 u_int stateidx, state; 2871 int s; 2872 int zombie = 0; 2873 2874 /* sanity check */ 2875 if (sah == NULL) 2876 panic("key_delsah: NULL pointer is passed"); 2877 2878 s = splsoftnet(); /*called from softclock()*/ 2879 2880 /* searching all SA registerd in the secindex. */ 2881 for (stateidx = 0; 2882 stateidx < _ARRAYLEN(saorder_state_any); 2883 stateidx++) { 2884 2885 state = saorder_state_any[stateidx]; 2886 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2887 sav != NULL; 2888 sav = nextsav) { 2889 2890 nextsav = LIST_NEXT(sav, chain); 2891 2892 if (sav->refcnt == 0) { 2893 /* sanity check */ 2894 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2895 KEY_FREESAV(&sav); 2896 } else { 2897 /* give up to delete this sa */ 2898 zombie++; 2899 } 2900 } 2901 } 2902 2903 /* don't delete sah only if there are savs. */ 2904 if (zombie) { 2905 splx(s); 2906 return; 2907 } 2908 2909 rtcache_free(&sah->sa_route); 2910 2911 /* remove from tree of SA index */ 2912 if (__LIST_CHAINED(sah)) 2913 LIST_REMOVE(sah, chain); 2914 2915 KFREE(sah); 2916 2917 splx(s); 2918 return; 2919 } 2920 2921 /* 2922 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2923 * and copy the values of mhp into new buffer. 2924 * When SAD message type is GETSPI: 2925 * to set sequence number from acq_seq++, 2926 * to set zero to SPI. 2927 * not to call key_setsava(). 2928 * OUT: NULL : fail 2929 * others : pointer to new secasvar. 2930 * 2931 * does not modify mbuf. does not free mbuf on error. 2932 */ 2933 static struct secasvar * 2934 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2935 struct secashead *sah, int *errp, 2936 const char* where, int tag) 2937 { 2938 struct secasvar *newsav; 2939 const struct sadb_sa *xsa; 2940 2941 /* sanity check */ 2942 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) 2943 panic("key_newsa: NULL pointer is passed"); 2944 2945 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2946 if (newsav == NULL) { 2947 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2948 *errp = ENOBUFS; 2949 goto done; 2950 } 2951 memset(newsav, 0, sizeof(struct secasvar)); 2952 2953 switch (mhp->msg->sadb_msg_type) { 2954 case SADB_GETSPI: 2955 newsav->spi = 0; 2956 2957 #ifdef IPSEC_DOSEQCHECK 2958 /* sync sequence number */ 2959 if (mhp->msg->sadb_msg_seq == 0) 2960 newsav->seq = 2961 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2962 else 2963 #endif 2964 newsav->seq = mhp->msg->sadb_msg_seq; 2965 break; 2966 2967 case SADB_ADD: 2968 /* sanity check */ 2969 if (mhp->ext[SADB_EXT_SA] == NULL) { 2970 KFREE(newsav), newsav = NULL; 2971 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2972 *errp = EINVAL; 2973 goto done; 2974 } 2975 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2976 newsav->spi = xsa->sadb_sa_spi; 2977 newsav->seq = mhp->msg->sadb_msg_seq; 2978 break; 2979 default: 2980 KFREE(newsav), newsav = NULL; 2981 *errp = EINVAL; 2982 goto done; 2983 } 2984 2985 /* copy sav values */ 2986 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2987 *errp = key_setsaval(newsav, m, mhp); 2988 if (*errp) { 2989 KFREE(newsav), newsav = NULL; 2990 goto done; 2991 } 2992 } 2993 2994 /* reset created */ 2995 newsav->created = time_uptime; 2996 newsav->pid = mhp->msg->sadb_msg_pid; 2997 2998 /* add to satree */ 2999 newsav->sah = sah; 3000 newsav->refcnt = 1; 3001 newsav->state = SADB_SASTATE_LARVAL; 3002 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 3003 secasvar, chain); 3004 done: 3005 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3006 printf("DP %s from %s:%u return SP:%p\n", __func__, 3007 where, tag, newsav)); 3008 3009 return newsav; 3010 } 3011 3012 /* 3013 * free() SA variable entry. 3014 */ 3015 static void 3016 key_delsav(struct secasvar *sav) 3017 { 3018 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav")); 3019 IPSEC_ASSERT(sav->refcnt == 0, 3020 ("key_delsav: reference count %u > 0", sav->refcnt)); 3021 3022 /* remove from SA header */ 3023 if (__LIST_CHAINED(sav)) 3024 LIST_REMOVE(sav, chain); 3025 3026 /* 3027 * Cleanup xform state. Note that zeroize'ing causes the 3028 * keys to be cleared; otherwise we must do it ourself. 3029 */ 3030 if (sav->tdb_xform != NULL) { 3031 sav->tdb_xform->xf_zeroize(sav); 3032 sav->tdb_xform = NULL; 3033 } else { 3034 if (sav->key_auth != NULL) 3035 explicit_memset(_KEYBUF(sav->key_auth), 0, 3036 _KEYLEN(sav->key_auth)); 3037 if (sav->key_enc != NULL) 3038 explicit_memset(_KEYBUF(sav->key_enc), 0, 3039 _KEYLEN(sav->key_enc)); 3040 } 3041 if (sav->key_auth != NULL) { 3042 KFREE(sav->key_auth); 3043 sav->key_auth = NULL; 3044 } 3045 if (sav->key_enc != NULL) { 3046 KFREE(sav->key_enc); 3047 sav->key_enc = NULL; 3048 } 3049 if (sav->replay != NULL) { 3050 KFREE(sav->replay); 3051 sav->replay = NULL; 3052 } 3053 if (sav->lft_c != NULL) { 3054 KFREE(sav->lft_c); 3055 sav->lft_c = NULL; 3056 } 3057 if (sav->lft_h != NULL) { 3058 KFREE(sav->lft_h); 3059 sav->lft_h = NULL; 3060 } 3061 if (sav->lft_s != NULL) { 3062 KFREE(sav->lft_s); 3063 sav->lft_s = NULL; 3064 } 3065 3066 KFREE(sav); 3067 3068 return; 3069 } 3070 3071 /* 3072 * search SAD. 3073 * OUT: 3074 * NULL : not found 3075 * others : found, pointer to a SA. 3076 */ 3077 static struct secashead * 3078 key_getsah(const struct secasindex *saidx) 3079 { 3080 struct secashead *sah; 3081 3082 LIST_FOREACH(sah, &sahtree, chain) { 3083 if (sah->state == SADB_SASTATE_DEAD) 3084 continue; 3085 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3086 return sah; 3087 } 3088 3089 return NULL; 3090 } 3091 3092 /* 3093 * check not to be duplicated SPI. 3094 * NOTE: this function is too slow due to searching all SAD. 3095 * OUT: 3096 * NULL : not found 3097 * others : found, pointer to a SA. 3098 */ 3099 static struct secasvar * 3100 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3101 { 3102 struct secashead *sah; 3103 struct secasvar *sav; 3104 3105 /* check address family */ 3106 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3107 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3108 return NULL; 3109 } 3110 3111 /* check all SAD */ 3112 LIST_FOREACH(sah, &sahtree, chain) { 3113 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3114 continue; 3115 sav = key_getsavbyspi(sah, spi); 3116 if (sav != NULL) 3117 return sav; 3118 } 3119 3120 return NULL; 3121 } 3122 3123 /* 3124 * search SAD litmited alive SA, protocol, SPI. 3125 * OUT: 3126 * NULL : not found 3127 * others : found, pointer to a SA. 3128 */ 3129 static struct secasvar * 3130 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3131 { 3132 struct secasvar *sav; 3133 u_int stateidx, state; 3134 3135 /* search all status */ 3136 for (stateidx = 0; 3137 stateidx < _ARRAYLEN(saorder_state_alive); 3138 stateidx++) { 3139 3140 state = saorder_state_alive[stateidx]; 3141 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3142 3143 /* sanity check */ 3144 if (sav->state != state) { 3145 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3146 "invalid sav->state (queue: %d SA: %d)\n", 3147 state, sav->state)); 3148 continue; 3149 } 3150 3151 if (sav->spi == spi) 3152 return sav; 3153 } 3154 } 3155 3156 return NULL; 3157 } 3158 3159 /* 3160 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3161 * You must update these if need. 3162 * OUT: 0: success. 3163 * !0: failure. 3164 * 3165 * does not modify mbuf. does not free mbuf on error. 3166 */ 3167 static int 3168 key_setsaval(struct secasvar *sav, struct mbuf *m, 3169 const struct sadb_msghdr *mhp) 3170 { 3171 int error = 0; 3172 3173 /* sanity check */ 3174 if (m == NULL || mhp == NULL || mhp->msg == NULL) 3175 panic("key_setsaval: NULL pointer is passed"); 3176 3177 /* initialization */ 3178 sav->replay = NULL; 3179 sav->key_auth = NULL; 3180 sav->key_enc = NULL; 3181 sav->lft_c = NULL; 3182 sav->lft_h = NULL; 3183 sav->lft_s = NULL; 3184 sav->tdb_xform = NULL; /* transform */ 3185 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3186 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3187 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3188 sav->natt_type = 0; 3189 sav->esp_frag = 0; 3190 3191 /* SA */ 3192 if (mhp->ext[SADB_EXT_SA] != NULL) { 3193 const struct sadb_sa *sa0; 3194 3195 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3196 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3197 error = EINVAL; 3198 goto fail; 3199 } 3200 3201 sav->alg_auth = sa0->sadb_sa_auth; 3202 sav->alg_enc = sa0->sadb_sa_encrypt; 3203 sav->flags = sa0->sadb_sa_flags; 3204 3205 /* replay window */ 3206 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3207 sav->replay = (struct secreplay *) 3208 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3209 if (sav->replay == NULL) { 3210 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3211 error = ENOBUFS; 3212 goto fail; 3213 } 3214 if (sa0->sadb_sa_replay != 0) 3215 sav->replay->bitmap = (char*)(sav->replay+1); 3216 sav->replay->wsize = sa0->sadb_sa_replay; 3217 } 3218 } 3219 3220 /* Authentication keys */ 3221 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3222 const struct sadb_key *key0; 3223 int len; 3224 3225 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3226 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3227 3228 error = 0; 3229 if (len < sizeof(*key0)) { 3230 error = EINVAL; 3231 goto fail; 3232 } 3233 switch (mhp->msg->sadb_msg_satype) { 3234 case SADB_SATYPE_AH: 3235 case SADB_SATYPE_ESP: 3236 case SADB_X_SATYPE_TCPSIGNATURE: 3237 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3238 sav->alg_auth != SADB_X_AALG_NULL) 3239 error = EINVAL; 3240 break; 3241 case SADB_X_SATYPE_IPCOMP: 3242 default: 3243 error = EINVAL; 3244 break; 3245 } 3246 if (error) { 3247 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3248 goto fail; 3249 } 3250 3251 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3252 if (sav->key_auth == NULL) { 3253 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3254 error = ENOBUFS; 3255 goto fail; 3256 } 3257 } 3258 3259 /* Encryption key */ 3260 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3261 const struct sadb_key *key0; 3262 int len; 3263 3264 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3265 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3266 3267 error = 0; 3268 if (len < sizeof(*key0)) { 3269 error = EINVAL; 3270 goto fail; 3271 } 3272 switch (mhp->msg->sadb_msg_satype) { 3273 case SADB_SATYPE_ESP: 3274 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3275 sav->alg_enc != SADB_EALG_NULL) { 3276 error = EINVAL; 3277 break; 3278 } 3279 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3280 if (sav->key_enc == NULL) { 3281 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3282 error = ENOBUFS; 3283 goto fail; 3284 } 3285 break; 3286 case SADB_X_SATYPE_IPCOMP: 3287 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3288 error = EINVAL; 3289 sav->key_enc = NULL; /*just in case*/ 3290 break; 3291 case SADB_SATYPE_AH: 3292 case SADB_X_SATYPE_TCPSIGNATURE: 3293 default: 3294 error = EINVAL; 3295 break; 3296 } 3297 if (error) { 3298 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3299 goto fail; 3300 } 3301 } 3302 3303 /* set iv */ 3304 sav->ivlen = 0; 3305 3306 switch (mhp->msg->sadb_msg_satype) { 3307 case SADB_SATYPE_AH: 3308 error = xform_init(sav, XF_AH); 3309 break; 3310 case SADB_SATYPE_ESP: 3311 error = xform_init(sav, XF_ESP); 3312 break; 3313 case SADB_X_SATYPE_IPCOMP: 3314 error = xform_init(sav, XF_IPCOMP); 3315 break; 3316 case SADB_X_SATYPE_TCPSIGNATURE: 3317 error = xform_init(sav, XF_TCPSIGNATURE); 3318 break; 3319 } 3320 if (error) { 3321 ipseclog((LOG_DEBUG, 3322 "key_setsaval: unable to initialize SA type %u.\n", 3323 mhp->msg->sadb_msg_satype)); 3324 goto fail; 3325 } 3326 3327 /* reset created */ 3328 sav->created = time_uptime; 3329 3330 /* make lifetime for CURRENT */ 3331 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3332 sizeof(struct sadb_lifetime)); 3333 if (sav->lft_c == NULL) { 3334 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3335 error = ENOBUFS; 3336 goto fail; 3337 } 3338 3339 sav->lft_c->sadb_lifetime_len = 3340 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3341 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3342 sav->lft_c->sadb_lifetime_allocations = 0; 3343 sav->lft_c->sadb_lifetime_bytes = 0; 3344 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3345 sav->lft_c->sadb_lifetime_usetime = 0; 3346 3347 /* lifetimes for HARD and SOFT */ 3348 { 3349 const struct sadb_lifetime *lft0; 3350 3351 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3352 if (lft0 != NULL) { 3353 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3354 error = EINVAL; 3355 goto fail; 3356 } 3357 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3358 sizeof(*lft0)); 3359 if (sav->lft_h == NULL) { 3360 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3361 error = ENOBUFS; 3362 goto fail; 3363 } 3364 /* to be initialize ? */ 3365 } 3366 3367 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3368 if (lft0 != NULL) { 3369 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3370 error = EINVAL; 3371 goto fail; 3372 } 3373 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3374 sizeof(*lft0)); 3375 if (sav->lft_s == NULL) { 3376 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3377 error = ENOBUFS; 3378 goto fail; 3379 } 3380 /* to be initialize ? */ 3381 } 3382 } 3383 3384 return 0; 3385 3386 fail: 3387 /* initialization */ 3388 if (sav->replay != NULL) { 3389 KFREE(sav->replay); 3390 sav->replay = NULL; 3391 } 3392 if (sav->key_auth != NULL) { 3393 KFREE(sav->key_auth); 3394 sav->key_auth = NULL; 3395 } 3396 if (sav->key_enc != NULL) { 3397 KFREE(sav->key_enc); 3398 sav->key_enc = NULL; 3399 } 3400 if (sav->lft_c != NULL) { 3401 KFREE(sav->lft_c); 3402 sav->lft_c = NULL; 3403 } 3404 if (sav->lft_h != NULL) { 3405 KFREE(sav->lft_h); 3406 sav->lft_h = NULL; 3407 } 3408 if (sav->lft_s != NULL) { 3409 KFREE(sav->lft_s); 3410 sav->lft_s = NULL; 3411 } 3412 3413 return error; 3414 } 3415 3416 /* 3417 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3418 * OUT: 0: valid 3419 * other: errno 3420 */ 3421 static int 3422 key_mature(struct secasvar *sav) 3423 { 3424 int error; 3425 3426 /* check SPI value */ 3427 switch (sav->sah->saidx.proto) { 3428 case IPPROTO_ESP: 3429 case IPPROTO_AH: 3430 if (ntohl(sav->spi) <= 255) { 3431 ipseclog((LOG_DEBUG, 3432 "key_mature: illegal range of SPI %u.\n", 3433 (u_int32_t)ntohl(sav->spi))); 3434 return EINVAL; 3435 } 3436 break; 3437 } 3438 3439 /* check satype */ 3440 switch (sav->sah->saidx.proto) { 3441 case IPPROTO_ESP: 3442 /* check flags */ 3443 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3444 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3445 ipseclog((LOG_DEBUG, "key_mature: " 3446 "invalid flag (derived) given to old-esp.\n")); 3447 return EINVAL; 3448 } 3449 error = xform_init(sav, XF_ESP); 3450 break; 3451 case IPPROTO_AH: 3452 /* check flags */ 3453 if (sav->flags & SADB_X_EXT_DERIV) { 3454 ipseclog((LOG_DEBUG, "key_mature: " 3455 "invalid flag (derived) given to AH SA.\n")); 3456 return EINVAL; 3457 } 3458 if (sav->alg_enc != SADB_EALG_NONE) { 3459 ipseclog((LOG_DEBUG, "key_mature: " 3460 "protocol and algorithm mismated.\n")); 3461 return(EINVAL); 3462 } 3463 error = xform_init(sav, XF_AH); 3464 break; 3465 case IPPROTO_IPCOMP: 3466 if (sav->alg_auth != SADB_AALG_NONE) { 3467 ipseclog((LOG_DEBUG, "key_mature: " 3468 "protocol and algorithm mismated.\n")); 3469 return(EINVAL); 3470 } 3471 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3472 && ntohl(sav->spi) >= 0x10000) { 3473 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3474 return(EINVAL); 3475 } 3476 error = xform_init(sav, XF_IPCOMP); 3477 break; 3478 case IPPROTO_TCP: 3479 if (sav->alg_enc != SADB_EALG_NONE) { 3480 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3481 "mismated.\n", __func__)); 3482 return(EINVAL); 3483 } 3484 error = xform_init(sav, XF_TCPSIGNATURE); 3485 break; 3486 default: 3487 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3488 error = EPROTONOSUPPORT; 3489 break; 3490 } 3491 if (error == 0) 3492 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3493 return (error); 3494 } 3495 3496 /* 3497 * subroutine for SADB_GET and SADB_DUMP. 3498 */ 3499 static struct mbuf * 3500 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3501 u_int32_t seq, u_int32_t pid) 3502 { 3503 struct mbuf *result = NULL, *tres = NULL, *m; 3504 int l = 0; 3505 int i; 3506 void *p; 3507 struct sadb_lifetime lt; 3508 int dumporder[] = { 3509 SADB_EXT_SA, SADB_X_EXT_SA2, 3510 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3511 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3512 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3513 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3514 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3515 SADB_X_EXT_NAT_T_TYPE, 3516 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3517 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3518 SADB_X_EXT_NAT_T_FRAG, 3519 3520 }; 3521 3522 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3523 if (m == NULL) 3524 goto fail; 3525 result = m; 3526 3527 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3528 m = NULL; 3529 p = NULL; 3530 switch (dumporder[i]) { 3531 case SADB_EXT_SA: 3532 m = key_setsadbsa(sav); 3533 break; 3534 3535 case SADB_X_EXT_SA2: 3536 m = key_setsadbxsa2(sav->sah->saidx.mode, 3537 sav->replay ? sav->replay->count : 0, 3538 sav->sah->saidx.reqid); 3539 break; 3540 3541 case SADB_EXT_ADDRESS_SRC: 3542 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3543 &sav->sah->saidx.src.sa, 3544 FULLMASK, IPSEC_ULPROTO_ANY); 3545 break; 3546 3547 case SADB_EXT_ADDRESS_DST: 3548 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3549 &sav->sah->saidx.dst.sa, 3550 FULLMASK, IPSEC_ULPROTO_ANY); 3551 break; 3552 3553 case SADB_EXT_KEY_AUTH: 3554 if (!sav->key_auth) 3555 continue; 3556 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3557 p = sav->key_auth; 3558 break; 3559 3560 case SADB_EXT_KEY_ENCRYPT: 3561 if (!sav->key_enc) 3562 continue; 3563 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3564 p = sav->key_enc; 3565 break; 3566 3567 case SADB_EXT_LIFETIME_CURRENT: 3568 if (!sav->lft_c) 3569 continue; 3570 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3571 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3572 lt.sadb_lifetime_addtime += time_second - time_uptime; 3573 lt.sadb_lifetime_usetime += time_second - time_uptime; 3574 p = < 3575 break; 3576 3577 case SADB_EXT_LIFETIME_HARD: 3578 if (!sav->lft_h) 3579 continue; 3580 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3581 p = sav->lft_h; 3582 break; 3583 3584 case SADB_EXT_LIFETIME_SOFT: 3585 if (!sav->lft_s) 3586 continue; 3587 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3588 p = sav->lft_s; 3589 break; 3590 3591 case SADB_X_EXT_NAT_T_TYPE: 3592 m = key_setsadbxtype(sav->natt_type); 3593 break; 3594 3595 case SADB_X_EXT_NAT_T_DPORT: 3596 if (sav->natt_type == 0) 3597 continue; 3598 m = key_setsadbxport( 3599 key_portfromsaddr(&sav->sah->saidx.dst), 3600 SADB_X_EXT_NAT_T_DPORT); 3601 break; 3602 3603 case SADB_X_EXT_NAT_T_SPORT: 3604 if (sav->natt_type == 0) 3605 continue; 3606 m = key_setsadbxport( 3607 key_portfromsaddr(&sav->sah->saidx.src), 3608 SADB_X_EXT_NAT_T_SPORT); 3609 break; 3610 3611 case SADB_X_EXT_NAT_T_FRAG: 3612 /* don't send frag info if not set */ 3613 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3614 continue; 3615 m = key_setsadbxfrag(sav->esp_frag); 3616 break; 3617 3618 case SADB_X_EXT_NAT_T_OAI: 3619 case SADB_X_EXT_NAT_T_OAR: 3620 continue; 3621 3622 case SADB_EXT_ADDRESS_PROXY: 3623 case SADB_EXT_IDENTITY_SRC: 3624 case SADB_EXT_IDENTITY_DST: 3625 /* XXX: should we brought from SPD ? */ 3626 case SADB_EXT_SENSITIVITY: 3627 default: 3628 continue; 3629 } 3630 3631 KASSERT(!(m && p)); 3632 if (!m && !p) 3633 goto fail; 3634 if (p && tres) { 3635 M_PREPEND(tres, l, M_DONTWAIT); 3636 if (!tres) 3637 goto fail; 3638 memcpy(mtod(tres, void *), p, l); 3639 continue; 3640 } 3641 if (p) { 3642 m = key_alloc_mbuf(l); 3643 if (!m) 3644 goto fail; 3645 m_copyback(m, 0, l, p); 3646 } 3647 3648 if (tres) 3649 m_cat(m, tres); 3650 tres = m; 3651 } 3652 3653 m_cat(result, tres); 3654 tres = NULL; /* avoid free on error below */ 3655 3656 if (result->m_len < sizeof(struct sadb_msg)) { 3657 result = m_pullup(result, sizeof(struct sadb_msg)); 3658 if (result == NULL) 3659 goto fail; 3660 } 3661 3662 result->m_pkthdr.len = 0; 3663 for (m = result; m; m = m->m_next) 3664 result->m_pkthdr.len += m->m_len; 3665 3666 mtod(result, struct sadb_msg *)->sadb_msg_len = 3667 PFKEY_UNIT64(result->m_pkthdr.len); 3668 3669 return result; 3670 3671 fail: 3672 m_freem(result); 3673 m_freem(tres); 3674 return NULL; 3675 } 3676 3677 3678 /* 3679 * set a type in sadb_x_nat_t_type 3680 */ 3681 static struct mbuf * 3682 key_setsadbxtype(u_int16_t type) 3683 { 3684 struct mbuf *m; 3685 size_t len; 3686 struct sadb_x_nat_t_type *p; 3687 3688 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3689 3690 m = key_alloc_mbuf(len); 3691 if (!m || m->m_next) { /*XXX*/ 3692 if (m) 3693 m_freem(m); 3694 return NULL; 3695 } 3696 3697 p = mtod(m, struct sadb_x_nat_t_type *); 3698 3699 memset(p, 0, len); 3700 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3701 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3702 p->sadb_x_nat_t_type_type = type; 3703 3704 return m; 3705 } 3706 /* 3707 * set a port in sadb_x_nat_t_port. port is in network order 3708 */ 3709 static struct mbuf * 3710 key_setsadbxport(u_int16_t port, u_int16_t type) 3711 { 3712 struct mbuf *m; 3713 size_t len; 3714 struct sadb_x_nat_t_port *p; 3715 3716 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3717 3718 m = key_alloc_mbuf(len); 3719 if (!m || m->m_next) { /*XXX*/ 3720 if (m) 3721 m_freem(m); 3722 return NULL; 3723 } 3724 3725 p = mtod(m, struct sadb_x_nat_t_port *); 3726 3727 memset(p, 0, len); 3728 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3729 p->sadb_x_nat_t_port_exttype = type; 3730 p->sadb_x_nat_t_port_port = port; 3731 3732 return m; 3733 } 3734 3735 /* 3736 * set fragmentation info in sadb_x_nat_t_frag 3737 */ 3738 static struct mbuf * 3739 key_setsadbxfrag(u_int16_t flen) 3740 { 3741 struct mbuf *m; 3742 size_t len; 3743 struct sadb_x_nat_t_frag *p; 3744 3745 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3746 3747 m = key_alloc_mbuf(len); 3748 if (!m || m->m_next) { /*XXX*/ 3749 if (m) 3750 m_freem(m); 3751 return NULL; 3752 } 3753 3754 p = mtod(m, struct sadb_x_nat_t_frag *); 3755 3756 memset(p, 0, len); 3757 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3758 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3759 p->sadb_x_nat_t_frag_fraglen = flen; 3760 3761 return m; 3762 } 3763 3764 /* 3765 * Get port from sockaddr, port is in network order 3766 */ 3767 u_int16_t 3768 key_portfromsaddr(const union sockaddr_union *saddr) 3769 { 3770 u_int16_t port; 3771 3772 switch (saddr->sa.sa_family) { 3773 case AF_INET: { 3774 port = saddr->sin.sin_port; 3775 break; 3776 } 3777 #ifdef INET6 3778 case AF_INET6: { 3779 port = saddr->sin6.sin6_port; 3780 break; 3781 } 3782 #endif 3783 default: 3784 printf("%s: unexpected address family\n", __func__); 3785 port = 0; 3786 break; 3787 } 3788 3789 return port; 3790 } 3791 3792 3793 /* 3794 * Set port is struct sockaddr. port is in network order 3795 */ 3796 static void 3797 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3798 { 3799 switch (saddr->sa.sa_family) { 3800 case AF_INET: { 3801 saddr->sin.sin_port = port; 3802 break; 3803 } 3804 #ifdef INET6 3805 case AF_INET6: { 3806 saddr->sin6.sin6_port = port; 3807 break; 3808 } 3809 #endif 3810 default: 3811 printf("%s: unexpected address family %d\n", __func__, 3812 saddr->sa.sa_family); 3813 break; 3814 } 3815 3816 return; 3817 } 3818 3819 /* 3820 * Safety check sa_len 3821 */ 3822 static int 3823 key_checksalen(const union sockaddr_union *saddr) 3824 { 3825 switch (saddr->sa.sa_family) { 3826 case AF_INET: 3827 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3828 return -1; 3829 break; 3830 #ifdef INET6 3831 case AF_INET6: 3832 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3833 return -1; 3834 break; 3835 #endif 3836 default: 3837 printf("%s: unexpected sa_family %d\n", __func__, 3838 saddr->sa.sa_family); 3839 return -1; 3840 break; 3841 } 3842 return 0; 3843 } 3844 3845 3846 /* 3847 * set data into sadb_msg. 3848 */ 3849 static struct mbuf * 3850 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3851 u_int32_t seq, pid_t pid, u_int16_t reserved) 3852 { 3853 struct mbuf *m; 3854 struct sadb_msg *p; 3855 int len; 3856 3857 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3858 if (len > MCLBYTES) 3859 return NULL; 3860 MGETHDR(m, M_DONTWAIT, MT_DATA); 3861 if (m && len > MHLEN) { 3862 MCLGET(m, M_DONTWAIT); 3863 if ((m->m_flags & M_EXT) == 0) { 3864 m_freem(m); 3865 m = NULL; 3866 } 3867 } 3868 if (!m) 3869 return NULL; 3870 m->m_pkthdr.len = m->m_len = len; 3871 m->m_next = NULL; 3872 3873 p = mtod(m, struct sadb_msg *); 3874 3875 memset(p, 0, len); 3876 p->sadb_msg_version = PF_KEY_V2; 3877 p->sadb_msg_type = type; 3878 p->sadb_msg_errno = 0; 3879 p->sadb_msg_satype = satype; 3880 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3881 p->sadb_msg_reserved = reserved; 3882 p->sadb_msg_seq = seq; 3883 p->sadb_msg_pid = (u_int32_t)pid; 3884 3885 return m; 3886 } 3887 3888 /* 3889 * copy secasvar data into sadb_address. 3890 */ 3891 static struct mbuf * 3892 key_setsadbsa(struct secasvar *sav) 3893 { 3894 struct mbuf *m; 3895 struct sadb_sa *p; 3896 int len; 3897 3898 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3899 m = key_alloc_mbuf(len); 3900 if (!m || m->m_next) { /*XXX*/ 3901 if (m) 3902 m_freem(m); 3903 return NULL; 3904 } 3905 3906 p = mtod(m, struct sadb_sa *); 3907 3908 memset(p, 0, len); 3909 p->sadb_sa_len = PFKEY_UNIT64(len); 3910 p->sadb_sa_exttype = SADB_EXT_SA; 3911 p->sadb_sa_spi = sav->spi; 3912 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3913 p->sadb_sa_state = sav->state; 3914 p->sadb_sa_auth = sav->alg_auth; 3915 p->sadb_sa_encrypt = sav->alg_enc; 3916 p->sadb_sa_flags = sav->flags; 3917 3918 return m; 3919 } 3920 3921 /* 3922 * set data into sadb_address. 3923 */ 3924 static struct mbuf * 3925 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3926 u_int8_t prefixlen, u_int16_t ul_proto) 3927 { 3928 struct mbuf *m; 3929 struct sadb_address *p; 3930 size_t len; 3931 3932 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3933 PFKEY_ALIGN8(saddr->sa_len); 3934 m = key_alloc_mbuf(len); 3935 if (!m || m->m_next) { /*XXX*/ 3936 if (m) 3937 m_freem(m); 3938 return NULL; 3939 } 3940 3941 p = mtod(m, struct sadb_address *); 3942 3943 memset(p, 0, len); 3944 p->sadb_address_len = PFKEY_UNIT64(len); 3945 p->sadb_address_exttype = exttype; 3946 p->sadb_address_proto = ul_proto; 3947 if (prefixlen == FULLMASK) { 3948 switch (saddr->sa_family) { 3949 case AF_INET: 3950 prefixlen = sizeof(struct in_addr) << 3; 3951 break; 3952 case AF_INET6: 3953 prefixlen = sizeof(struct in6_addr) << 3; 3954 break; 3955 default: 3956 ; /*XXX*/ 3957 } 3958 } 3959 p->sadb_address_prefixlen = prefixlen; 3960 p->sadb_address_reserved = 0; 3961 3962 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3963 saddr, saddr->sa_len); 3964 3965 return m; 3966 } 3967 3968 #if 0 3969 /* 3970 * set data into sadb_ident. 3971 */ 3972 static struct mbuf * 3973 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3974 void *string, int stringlen, u_int64_t id) 3975 { 3976 struct mbuf *m; 3977 struct sadb_ident *p; 3978 size_t len; 3979 3980 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3981 m = key_alloc_mbuf(len); 3982 if (!m || m->m_next) { /*XXX*/ 3983 if (m) 3984 m_freem(m); 3985 return NULL; 3986 } 3987 3988 p = mtod(m, struct sadb_ident *); 3989 3990 memset(p, 0, len); 3991 p->sadb_ident_len = PFKEY_UNIT64(len); 3992 p->sadb_ident_exttype = exttype; 3993 p->sadb_ident_type = idtype; 3994 p->sadb_ident_reserved = 0; 3995 p->sadb_ident_id = id; 3996 3997 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3998 string, stringlen); 3999 4000 return m; 4001 } 4002 #endif 4003 4004 /* 4005 * set data into sadb_x_sa2. 4006 */ 4007 static struct mbuf * 4008 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 4009 { 4010 struct mbuf *m; 4011 struct sadb_x_sa2 *p; 4012 size_t len; 4013 4014 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4015 m = key_alloc_mbuf(len); 4016 if (!m || m->m_next) { /*XXX*/ 4017 if (m) 4018 m_freem(m); 4019 return NULL; 4020 } 4021 4022 p = mtod(m, struct sadb_x_sa2 *); 4023 4024 memset(p, 0, len); 4025 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4026 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4027 p->sadb_x_sa2_mode = mode; 4028 p->sadb_x_sa2_reserved1 = 0; 4029 p->sadb_x_sa2_reserved2 = 0; 4030 p->sadb_x_sa2_sequence = seq; 4031 p->sadb_x_sa2_reqid = reqid; 4032 4033 return m; 4034 } 4035 4036 /* 4037 * set data into sadb_x_policy 4038 */ 4039 static struct mbuf * 4040 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 4041 { 4042 struct mbuf *m; 4043 struct sadb_x_policy *p; 4044 size_t len; 4045 4046 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4047 m = key_alloc_mbuf(len); 4048 if (!m || m->m_next) { /*XXX*/ 4049 if (m) 4050 m_freem(m); 4051 return NULL; 4052 } 4053 4054 p = mtod(m, struct sadb_x_policy *); 4055 4056 memset(p, 0, len); 4057 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4058 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4059 p->sadb_x_policy_type = type; 4060 p->sadb_x_policy_dir = dir; 4061 p->sadb_x_policy_id = id; 4062 4063 return m; 4064 } 4065 4066 /* %%% utilities */ 4067 /* 4068 * copy a buffer into the new buffer allocated. 4069 */ 4070 static void * 4071 key_newbuf(const void *src, u_int len) 4072 { 4073 void *new; 4074 4075 KMALLOC(new, void *, len); 4076 if (new == NULL) { 4077 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 4078 return NULL; 4079 } 4080 memcpy(new, src, len); 4081 4082 return new; 4083 } 4084 4085 /* compare my own address 4086 * OUT: 1: true, i.e. my address. 4087 * 0: false 4088 */ 4089 int 4090 key_ismyaddr(const struct sockaddr *sa) 4091 { 4092 #ifdef INET 4093 const struct sockaddr_in *sin; 4094 const struct in_ifaddr *ia; 4095 #endif 4096 4097 /* sanity check */ 4098 if (sa == NULL) 4099 panic("key_ismyaddr: NULL pointer is passed"); 4100 4101 switch (sa->sa_family) { 4102 #ifdef INET 4103 case AF_INET: 4104 sin = (const struct sockaddr_in *)sa; 4105 for (ia = in_ifaddrhead.tqh_first; ia; 4106 ia = ia->ia_link.tqe_next) 4107 { 4108 if (sin->sin_family == ia->ia_addr.sin_family && 4109 sin->sin_len == ia->ia_addr.sin_len && 4110 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4111 { 4112 return 1; 4113 } 4114 } 4115 break; 4116 #endif 4117 #ifdef INET6 4118 case AF_INET6: 4119 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4120 #endif 4121 } 4122 4123 return 0; 4124 } 4125 4126 #ifdef INET6 4127 /* 4128 * compare my own address for IPv6. 4129 * 1: ours 4130 * 0: other 4131 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4132 */ 4133 #include <netinet6/in6_var.h> 4134 4135 static int 4136 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4137 { 4138 const struct in6_ifaddr *ia; 4139 const struct in6_multi *in6m; 4140 4141 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 4142 if (key_sockaddrcmp((const struct sockaddr *)&sin6, 4143 (const struct sockaddr *)&ia->ia_addr, 0) == 0) 4144 return 1; 4145 4146 /* 4147 * XXX Multicast 4148 * XXX why do we care about multlicast here while we don't care 4149 * about IPv4 multicast?? 4150 * XXX scope 4151 */ 4152 in6m = NULL; 4153 #ifdef __FreeBSD__ 4154 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 4155 #else 4156 for ((in6m) = ia->ia6_multiaddrs.lh_first; 4157 (in6m) != NULL && 4158 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); 4159 (in6m) = in6m->in6m_entry.le_next) 4160 continue; 4161 #endif 4162 if (in6m) 4163 return 1; 4164 } 4165 4166 /* loopback, just for safety */ 4167 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4168 return 1; 4169 4170 return 0; 4171 } 4172 #endif /*INET6*/ 4173 4174 /* 4175 * compare two secasindex structure. 4176 * flag can specify to compare 2 saidxes. 4177 * compare two secasindex structure without both mode and reqid. 4178 * don't compare port. 4179 * IN: 4180 * saidx0: source, it can be in SAD. 4181 * saidx1: object. 4182 * OUT: 4183 * 1 : equal 4184 * 0 : not equal 4185 */ 4186 static int 4187 key_cmpsaidx( 4188 const struct secasindex *saidx0, 4189 const struct secasindex *saidx1, 4190 int flag) 4191 { 4192 int chkport = 0; 4193 4194 /* sanity */ 4195 if (saidx0 == NULL && saidx1 == NULL) 4196 return 1; 4197 4198 if (saidx0 == NULL || saidx1 == NULL) 4199 return 0; 4200 4201 if (saidx0->proto != saidx1->proto) 4202 return 0; 4203 4204 if (flag == CMP_EXACTLY) { 4205 if (saidx0->mode != saidx1->mode) 4206 return 0; 4207 if (saidx0->reqid != saidx1->reqid) 4208 return 0; 4209 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4210 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4211 return 0; 4212 } else { 4213 4214 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4215 if (flag == CMP_MODE_REQID 4216 ||flag == CMP_REQID) { 4217 /* 4218 * If reqid of SPD is non-zero, unique SA is required. 4219 * The result must be of same reqid in this case. 4220 */ 4221 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4222 return 0; 4223 } 4224 4225 if (flag == CMP_MODE_REQID) { 4226 if (saidx0->mode != IPSEC_MODE_ANY 4227 && saidx0->mode != saidx1->mode) 4228 return 0; 4229 } 4230 4231 /* 4232 * If NAT-T is enabled, check ports for tunnel mode. 4233 * Don't do it for transport mode, as there is no 4234 * port information available in the SP. 4235 * Also don't check ports if they are set to zero 4236 * in the SPD: This means we have a non-generated 4237 * SPD which can't know UDP ports. 4238 */ 4239 if (saidx1->mode == IPSEC_MODE_TUNNEL && 4240 ((((const struct sockaddr *)(&saidx1->src))->sa_family == AF_INET && 4241 ((const struct sockaddr *)(&saidx1->dst))->sa_family == AF_INET && 4242 ((const struct sockaddr_in *)(&saidx1->src))->sin_port && 4243 ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) || 4244 (((const struct sockaddr *)(&saidx1->src))->sa_family == AF_INET6 && 4245 ((const struct sockaddr *)(&saidx1->dst))->sa_family == AF_INET6 && 4246 ((const struct sockaddr_in6 *)(&saidx1->src))->sin6_port && 4247 ((const struct sockaddr_in6 *)(&saidx1->dst))->sin6_port))) 4248 chkport = 1; 4249 4250 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4251 return 0; 4252 } 4253 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4254 return 0; 4255 } 4256 } 4257 4258 return 1; 4259 } 4260 4261 /* 4262 * compare two secindex structure exactly. 4263 * IN: 4264 * spidx0: source, it is often in SPD. 4265 * spidx1: object, it is often from PFKEY message. 4266 * OUT: 4267 * 1 : equal 4268 * 0 : not equal 4269 */ 4270 int 4271 key_cmpspidx_exactly( 4272 const struct secpolicyindex *spidx0, 4273 const struct secpolicyindex *spidx1) 4274 { 4275 /* sanity */ 4276 if (spidx0 == NULL && spidx1 == NULL) 4277 return 1; 4278 4279 if (spidx0 == NULL || spidx1 == NULL) 4280 return 0; 4281 4282 if (spidx0->prefs != spidx1->prefs 4283 || spidx0->prefd != spidx1->prefd 4284 || spidx0->ul_proto != spidx1->ul_proto) 4285 return 0; 4286 4287 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4288 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4289 } 4290 4291 /* 4292 * compare two secindex structure with mask. 4293 * IN: 4294 * spidx0: source, it is often in SPD. 4295 * spidx1: object, it is often from IP header. 4296 * OUT: 4297 * 1 : equal 4298 * 0 : not equal 4299 */ 4300 int 4301 key_cmpspidx_withmask( 4302 const struct secpolicyindex *spidx0, 4303 const struct secpolicyindex *spidx1) 4304 { 4305 /* sanity */ 4306 if (spidx0 == NULL && spidx1 == NULL) 4307 return 1; 4308 4309 if (spidx0 == NULL || spidx1 == NULL) 4310 return 0; 4311 4312 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4313 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4314 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4315 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4316 return 0; 4317 4318 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4319 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4320 && spidx0->ul_proto != spidx1->ul_proto) 4321 return 0; 4322 4323 switch (spidx0->src.sa.sa_family) { 4324 case AF_INET: 4325 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4326 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4327 return 0; 4328 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4329 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4330 return 0; 4331 break; 4332 case AF_INET6: 4333 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4334 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4335 return 0; 4336 /* 4337 * scope_id check. if sin6_scope_id is 0, we regard it 4338 * as a wildcard scope, which matches any scope zone ID. 4339 */ 4340 if (spidx0->src.sin6.sin6_scope_id && 4341 spidx1->src.sin6.sin6_scope_id && 4342 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4343 return 0; 4344 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4345 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4346 return 0; 4347 break; 4348 default: 4349 /* XXX */ 4350 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4351 return 0; 4352 break; 4353 } 4354 4355 switch (spidx0->dst.sa.sa_family) { 4356 case AF_INET: 4357 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4358 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4359 return 0; 4360 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4361 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4362 return 0; 4363 break; 4364 case AF_INET6: 4365 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4366 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4367 return 0; 4368 /* 4369 * scope_id check. if sin6_scope_id is 0, we regard it 4370 * as a wildcard scope, which matches any scope zone ID. 4371 */ 4372 if (spidx0->src.sin6.sin6_scope_id && 4373 spidx1->src.sin6.sin6_scope_id && 4374 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4375 return 0; 4376 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4377 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4378 return 0; 4379 break; 4380 default: 4381 /* XXX */ 4382 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4383 return 0; 4384 break; 4385 } 4386 4387 /* XXX Do we check other field ? e.g. flowinfo */ 4388 4389 return 1; 4390 } 4391 4392 /* returns 0 on match */ 4393 static int 4394 key_sockaddrcmp( 4395 const struct sockaddr *sa1, 4396 const struct sockaddr *sa2, 4397 int port) 4398 { 4399 #ifdef satosin 4400 #undef satosin 4401 #endif 4402 #define satosin(s) ((const struct sockaddr_in *)s) 4403 #ifdef satosin6 4404 #undef satosin6 4405 #endif 4406 #define satosin6(s) ((const struct sockaddr_in6 *)s) 4407 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4408 return 1; 4409 4410 switch (sa1->sa_family) { 4411 case AF_INET: 4412 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4413 return 1; 4414 if (satosin(sa1)->sin_addr.s_addr != 4415 satosin(sa2)->sin_addr.s_addr) { 4416 return 1; 4417 } 4418 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4419 return 1; 4420 break; 4421 case AF_INET6: 4422 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4423 return 1; /*EINVAL*/ 4424 if (satosin6(sa1)->sin6_scope_id != 4425 satosin6(sa2)->sin6_scope_id) { 4426 return 1; 4427 } 4428 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4429 &satosin6(sa2)->sin6_addr)) { 4430 return 1; 4431 } 4432 if (port && 4433 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4434 return 1; 4435 } 4436 break; 4437 default: 4438 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4439 return 1; 4440 break; 4441 } 4442 4443 return 0; 4444 #undef satosin 4445 #undef satosin6 4446 } 4447 4448 /* 4449 * compare two buffers with mask. 4450 * IN: 4451 * addr1: source 4452 * addr2: object 4453 * bits: Number of bits to compare 4454 * OUT: 4455 * 1 : equal 4456 * 0 : not equal 4457 */ 4458 static int 4459 key_bbcmp(const void *a1, const void *a2, u_int bits) 4460 { 4461 const unsigned char *p1 = a1; 4462 const unsigned char *p2 = a2; 4463 4464 /* XXX: This could be considerably faster if we compare a word 4465 * at a time, but it is complicated on LSB Endian machines */ 4466 4467 /* Handle null pointers */ 4468 if (p1 == NULL || p2 == NULL) 4469 return (p1 == p2); 4470 4471 while (bits >= 8) { 4472 if (*p1++ != *p2++) 4473 return 0; 4474 bits -= 8; 4475 } 4476 4477 if (bits > 0) { 4478 u_int8_t mask = ~((1<<(8-bits))-1); 4479 if ((*p1 & mask) != (*p2 & mask)) 4480 return 0; 4481 } 4482 return 1; /* Match! */ 4483 } 4484 4485 /* 4486 * time handler. 4487 * scanning SPD and SAD to check status for each entries, 4488 * and do to remove or to expire. 4489 */ 4490 void 4491 key_timehandler(void* arg) 4492 { 4493 u_int dir; 4494 int s; 4495 time_t now = time_uptime; 4496 4497 s = splsoftnet(); /*called from softclock()*/ 4498 mutex_enter(softnet_lock); 4499 4500 /* SPD */ 4501 { 4502 struct secpolicy *sp, *nextsp; 4503 4504 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4505 for (sp = LIST_FIRST(&sptree[dir]); 4506 sp != NULL; 4507 sp = nextsp) { 4508 4509 nextsp = LIST_NEXT(sp, chain); 4510 4511 if (sp->state == IPSEC_SPSTATE_DEAD) { 4512 key_sp_unlink(sp); /*XXX*/ 4513 4514 /* 'sp' dead; continue transfers to 4515 * 'sp = nextsp' 4516 */ 4517 continue; 4518 } 4519 4520 if (sp->lifetime == 0 && sp->validtime == 0) 4521 continue; 4522 4523 /* the deletion will occur next time */ 4524 if ((sp->lifetime && now - sp->created > sp->lifetime) 4525 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4526 key_sp_dead(sp); 4527 key_spdexpire(sp); 4528 continue; 4529 } 4530 } 4531 } 4532 } 4533 4534 /* SAD */ 4535 { 4536 struct secashead *sah, *nextsah; 4537 struct secasvar *sav, *nextsav; 4538 4539 for (sah = LIST_FIRST(&sahtree); 4540 sah != NULL; 4541 sah = nextsah) { 4542 4543 nextsah = LIST_NEXT(sah, chain); 4544 4545 /* if sah has been dead, then delete it and process next sah. */ 4546 if (sah->state == SADB_SASTATE_DEAD) { 4547 key_delsah(sah); 4548 continue; 4549 } 4550 4551 /* if LARVAL entry doesn't become MATURE, delete it. */ 4552 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4553 sav != NULL; 4554 sav = nextsav) { 4555 4556 nextsav = LIST_NEXT(sav, chain); 4557 4558 if (now - sav->created > key_larval_lifetime) { 4559 KEY_FREESAV(&sav); 4560 } 4561 } 4562 4563 /* 4564 * check MATURE entry to start to send expire message 4565 * whether or not. 4566 */ 4567 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4568 sav != NULL; 4569 sav = nextsav) { 4570 4571 nextsav = LIST_NEXT(sav, chain); 4572 4573 /* we don't need to check. */ 4574 if (sav->lft_s == NULL) 4575 continue; 4576 4577 /* sanity check */ 4578 if (sav->lft_c == NULL) { 4579 ipseclog((LOG_DEBUG,"key_timehandler: " 4580 "There is no CURRENT time, why?\n")); 4581 continue; 4582 } 4583 4584 /* check SOFT lifetime */ 4585 if (sav->lft_s->sadb_lifetime_addtime != 0 4586 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4587 /* 4588 * check SA to be used whether or not. 4589 * when SA hasn't been used, delete it. 4590 */ 4591 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4592 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4593 KEY_FREESAV(&sav); 4594 } else { 4595 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4596 /* 4597 * XXX If we keep to send expire 4598 * message in the status of 4599 * DYING. Do remove below code. 4600 */ 4601 key_expire(sav); 4602 } 4603 } 4604 /* check SOFT lifetime by bytes */ 4605 /* 4606 * XXX I don't know the way to delete this SA 4607 * when new SA is installed. Caution when it's 4608 * installed too big lifetime by time. 4609 */ 4610 else if (sav->lft_s->sadb_lifetime_bytes != 0 4611 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4612 4613 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4614 /* 4615 * XXX If we keep to send expire 4616 * message in the status of 4617 * DYING. Do remove below code. 4618 */ 4619 key_expire(sav); 4620 } 4621 } 4622 4623 /* check DYING entry to change status to DEAD. */ 4624 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4625 sav != NULL; 4626 sav = nextsav) { 4627 4628 nextsav = LIST_NEXT(sav, chain); 4629 4630 /* we don't need to check. */ 4631 if (sav->lft_h == NULL) 4632 continue; 4633 4634 /* sanity check */ 4635 if (sav->lft_c == NULL) { 4636 ipseclog((LOG_DEBUG, "key_timehandler: " 4637 "There is no CURRENT time, why?\n")); 4638 continue; 4639 } 4640 4641 if (sav->lft_h->sadb_lifetime_addtime != 0 4642 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4643 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4644 KEY_FREESAV(&sav); 4645 } 4646 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4647 else if (sav->lft_s != NULL 4648 && sav->lft_s->sadb_lifetime_addtime != 0 4649 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4650 /* 4651 * XXX: should be checked to be 4652 * installed the valid SA. 4653 */ 4654 4655 /* 4656 * If there is no SA then sending 4657 * expire message. 4658 */ 4659 key_expire(sav); 4660 } 4661 #endif 4662 /* check HARD lifetime by bytes */ 4663 else if (sav->lft_h->sadb_lifetime_bytes != 0 4664 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4665 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4666 KEY_FREESAV(&sav); 4667 } 4668 } 4669 4670 /* delete entry in DEAD */ 4671 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4672 sav != NULL; 4673 sav = nextsav) { 4674 4675 nextsav = LIST_NEXT(sav, chain); 4676 4677 /* sanity check */ 4678 if (sav->state != SADB_SASTATE_DEAD) { 4679 ipseclog((LOG_DEBUG, "key_timehandler: " 4680 "invalid sav->state " 4681 "(queue: %d SA: %d): " 4682 "kill it anyway\n", 4683 SADB_SASTATE_DEAD, sav->state)); 4684 } 4685 4686 /* 4687 * do not call key_freesav() here. 4688 * sav should already be freed, and sav->refcnt 4689 * shows other references to sav 4690 * (such as from SPD). 4691 */ 4692 } 4693 } 4694 } 4695 4696 #ifndef IPSEC_NONBLOCK_ACQUIRE 4697 /* ACQ tree */ 4698 { 4699 struct secacq *acq, *nextacq; 4700 4701 for (acq = LIST_FIRST(&acqtree); 4702 acq != NULL; 4703 acq = nextacq) { 4704 4705 nextacq = LIST_NEXT(acq, chain); 4706 4707 if (now - acq->created > key_blockacq_lifetime 4708 && __LIST_CHAINED(acq)) { 4709 LIST_REMOVE(acq, chain); 4710 KFREE(acq); 4711 } 4712 } 4713 } 4714 #endif 4715 4716 /* SP ACQ tree */ 4717 { 4718 struct secspacq *acq, *nextacq; 4719 4720 for (acq = LIST_FIRST(&spacqtree); 4721 acq != NULL; 4722 acq = nextacq) { 4723 4724 nextacq = LIST_NEXT(acq, chain); 4725 4726 if (now - acq->created > key_blockacq_lifetime 4727 && __LIST_CHAINED(acq)) { 4728 LIST_REMOVE(acq, chain); 4729 KFREE(acq); 4730 } 4731 } 4732 } 4733 4734 #ifndef IPSEC_DEBUG2 4735 /* do exchange to tick time !! */ 4736 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4737 #endif /* IPSEC_DEBUG2 */ 4738 4739 mutex_exit(softnet_lock); 4740 splx(s); 4741 return; 4742 } 4743 4744 u_long 4745 key_random(void) 4746 { 4747 u_long value; 4748 4749 key_randomfill(&value, sizeof(value)); 4750 return value; 4751 } 4752 4753 void 4754 key_randomfill(void *p, size_t l) 4755 { 4756 4757 cprng_fast(p, l); 4758 } 4759 4760 /* 4761 * map SADB_SATYPE_* to IPPROTO_*. 4762 * if satype == SADB_SATYPE then satype is mapped to ~0. 4763 * OUT: 4764 * 0: invalid satype. 4765 */ 4766 static u_int16_t 4767 key_satype2proto(u_int8_t satype) 4768 { 4769 switch (satype) { 4770 case SADB_SATYPE_UNSPEC: 4771 return IPSEC_PROTO_ANY; 4772 case SADB_SATYPE_AH: 4773 return IPPROTO_AH; 4774 case SADB_SATYPE_ESP: 4775 return IPPROTO_ESP; 4776 case SADB_X_SATYPE_IPCOMP: 4777 return IPPROTO_IPCOMP; 4778 case SADB_X_SATYPE_TCPSIGNATURE: 4779 return IPPROTO_TCP; 4780 default: 4781 return 0; 4782 } 4783 /* NOTREACHED */ 4784 } 4785 4786 /* 4787 * map IPPROTO_* to SADB_SATYPE_* 4788 * OUT: 4789 * 0: invalid protocol type. 4790 */ 4791 static u_int8_t 4792 key_proto2satype(u_int16_t proto) 4793 { 4794 switch (proto) { 4795 case IPPROTO_AH: 4796 return SADB_SATYPE_AH; 4797 case IPPROTO_ESP: 4798 return SADB_SATYPE_ESP; 4799 case IPPROTO_IPCOMP: 4800 return SADB_X_SATYPE_IPCOMP; 4801 case IPPROTO_TCP: 4802 return SADB_X_SATYPE_TCPSIGNATURE; 4803 default: 4804 return 0; 4805 } 4806 /* NOTREACHED */ 4807 } 4808 4809 static int 4810 key_setsecasidx(int proto, int mode, int reqid, 4811 const struct sadb_address * src, 4812 const struct sadb_address * dst, 4813 struct secasindex * saidx) 4814 { 4815 const union sockaddr_union * src_u = 4816 (const union sockaddr_union *) src; 4817 const union sockaddr_union * dst_u = 4818 (const union sockaddr_union *) dst; 4819 4820 /* sa len safety check */ 4821 if (key_checksalen(src_u) != 0) 4822 return -1; 4823 if (key_checksalen(dst_u) != 0) 4824 return -1; 4825 4826 memset(saidx, 0, sizeof(*saidx)); 4827 saidx->proto = proto; 4828 saidx->mode = mode; 4829 saidx->reqid = reqid; 4830 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4831 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4832 4833 key_porttosaddr(&((saidx)->src),0); 4834 key_porttosaddr(&((saidx)->dst),0); 4835 return 0; 4836 } 4837 4838 /* %%% PF_KEY */ 4839 /* 4840 * SADB_GETSPI processing is to receive 4841 * <base, (SA2), src address, dst address, (SPI range)> 4842 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4843 * tree with the status of LARVAL, and send 4844 * <base, SA(*), address(SD)> 4845 * to the IKMPd. 4846 * 4847 * IN: mhp: pointer to the pointer to each header. 4848 * OUT: NULL if fail. 4849 * other if success, return pointer to the message to send. 4850 */ 4851 static int 4852 key_getspi(struct socket *so, struct mbuf *m, 4853 const struct sadb_msghdr *mhp) 4854 { 4855 struct sadb_address *src0, *dst0; 4856 struct secasindex saidx; 4857 struct secashead *newsah; 4858 struct secasvar *newsav; 4859 u_int8_t proto; 4860 u_int32_t spi; 4861 u_int8_t mode; 4862 u_int16_t reqid; 4863 int error; 4864 4865 /* sanity check */ 4866 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4867 panic("key_getspi: NULL pointer is passed"); 4868 4869 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4870 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4871 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4872 return key_senderror(so, m, EINVAL); 4873 } 4874 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4875 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4876 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4877 return key_senderror(so, m, EINVAL); 4878 } 4879 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4880 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4881 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4882 } else { 4883 mode = IPSEC_MODE_ANY; 4884 reqid = 0; 4885 } 4886 4887 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4888 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4889 4890 /* map satype to proto */ 4891 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4892 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4893 return key_senderror(so, m, EINVAL); 4894 } 4895 4896 4897 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 4898 dst0 + 1, &saidx)) != 0) 4899 return key_senderror(so, m, EINVAL); 4900 4901 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 4902 return key_senderror(so, m, EINVAL); 4903 4904 /* SPI allocation */ 4905 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4906 &saidx); 4907 if (spi == 0) 4908 return key_senderror(so, m, EINVAL); 4909 4910 /* get a SA index */ 4911 if ((newsah = key_getsah(&saidx)) == NULL) { 4912 /* create a new SA index */ 4913 if ((newsah = key_newsah(&saidx)) == NULL) { 4914 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4915 return key_senderror(so, m, ENOBUFS); 4916 } 4917 } 4918 4919 /* get a new SA */ 4920 /* XXX rewrite */ 4921 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4922 if (newsav == NULL) { 4923 /* XXX don't free new SA index allocated in above. */ 4924 return key_senderror(so, m, error); 4925 } 4926 4927 /* set spi */ 4928 newsav->spi = htonl(spi); 4929 4930 #ifndef IPSEC_NONBLOCK_ACQUIRE 4931 /* delete the entry in acqtree */ 4932 if (mhp->msg->sadb_msg_seq != 0) { 4933 struct secacq *acq; 4934 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4935 /* reset counter in order to deletion by timehandler. */ 4936 acq->created = time_uptime; 4937 acq->count = 0; 4938 } 4939 } 4940 #endif 4941 4942 { 4943 struct mbuf *n, *nn; 4944 struct sadb_sa *m_sa; 4945 struct sadb_msg *newmsg; 4946 int off, len; 4947 4948 /* create new sadb_msg to reply. */ 4949 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4950 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4951 if (len > MCLBYTES) 4952 return key_senderror(so, m, ENOBUFS); 4953 4954 MGETHDR(n, M_DONTWAIT, MT_DATA); 4955 if (len > MHLEN) { 4956 MCLGET(n, M_DONTWAIT); 4957 if ((n->m_flags & M_EXT) == 0) { 4958 m_freem(n); 4959 n = NULL; 4960 } 4961 } 4962 if (!n) 4963 return key_senderror(so, m, ENOBUFS); 4964 4965 n->m_len = len; 4966 n->m_next = NULL; 4967 off = 0; 4968 4969 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4970 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4971 4972 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4973 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4974 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4975 m_sa->sadb_sa_spi = htonl(spi); 4976 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4977 4978 #ifdef DIAGNOSTIC 4979 if (off != len) 4980 panic("length inconsistency in key_getspi"); 4981 #endif 4982 4983 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4984 SADB_EXT_ADDRESS_DST); 4985 if (!n->m_next) { 4986 m_freem(n); 4987 return key_senderror(so, m, ENOBUFS); 4988 } 4989 4990 if (n->m_len < sizeof(struct sadb_msg)) { 4991 n = m_pullup(n, sizeof(struct sadb_msg)); 4992 if (n == NULL) 4993 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4994 } 4995 4996 n->m_pkthdr.len = 0; 4997 for (nn = n; nn; nn = nn->m_next) 4998 n->m_pkthdr.len += nn->m_len; 4999 5000 newmsg = mtod(n, struct sadb_msg *); 5001 newmsg->sadb_msg_seq = newsav->seq; 5002 newmsg->sadb_msg_errno = 0; 5003 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5004 5005 m_freem(m); 5006 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5007 } 5008 } 5009 5010 /* 5011 * allocating new SPI 5012 * called by key_getspi(). 5013 * OUT: 5014 * 0: failure. 5015 * others: success. 5016 */ 5017 static u_int32_t 5018 key_do_getnewspi(const struct sadb_spirange *spirange, 5019 const struct secasindex *saidx) 5020 { 5021 u_int32_t newspi; 5022 u_int32_t spmin, spmax; 5023 int count = key_spi_trycnt; 5024 5025 /* set spi range to allocate */ 5026 if (spirange != NULL) { 5027 spmin = spirange->sadb_spirange_min; 5028 spmax = spirange->sadb_spirange_max; 5029 } else { 5030 spmin = key_spi_minval; 5031 spmax = key_spi_maxval; 5032 } 5033 /* IPCOMP needs 2-byte SPI */ 5034 if (saidx->proto == IPPROTO_IPCOMP) { 5035 u_int32_t t; 5036 if (spmin >= 0x10000) 5037 spmin = 0xffff; 5038 if (spmax >= 0x10000) 5039 spmax = 0xffff; 5040 if (spmin > spmax) { 5041 t = spmin; spmin = spmax; spmax = t; 5042 } 5043 } 5044 5045 if (spmin == spmax) { 5046 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5047 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 5048 return 0; 5049 } 5050 5051 count--; /* taking one cost. */ 5052 newspi = spmin; 5053 5054 } else { 5055 5056 /* init SPI */ 5057 newspi = 0; 5058 5059 /* when requesting to allocate spi ranged */ 5060 while (count--) { 5061 /* generate pseudo-random SPI value ranged. */ 5062 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5063 5064 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5065 break; 5066 } 5067 5068 if (count == 0 || newspi == 0) { 5069 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 5070 return 0; 5071 } 5072 } 5073 5074 /* statistics */ 5075 keystat.getspi_count = 5076 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5077 5078 return newspi; 5079 } 5080 5081 static int 5082 key_handle_natt_info(struct secasvar *sav, 5083 const struct sadb_msghdr *mhp) 5084 { 5085 const char *msg = "?" ; 5086 struct sadb_x_nat_t_type *type; 5087 struct sadb_x_nat_t_port *sport, *dport; 5088 struct sadb_address *iaddr, *raddr; 5089 struct sadb_x_nat_t_frag *frag; 5090 5091 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5092 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5093 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5094 return 0; 5095 5096 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5097 msg = "TYPE"; 5098 goto bad; 5099 } 5100 5101 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5102 msg = "SPORT"; 5103 goto bad; 5104 } 5105 5106 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5107 msg = "DPORT"; 5108 goto bad; 5109 } 5110 5111 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5112 ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n", __func__)); 5113 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5114 msg = "OAI"; 5115 goto bad; 5116 } 5117 } 5118 5119 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5120 ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n", __func__)); 5121 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5122 msg = "OAR"; 5123 goto bad; 5124 } 5125 } 5126 5127 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5128 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5129 msg = "FRAG"; 5130 goto bad; 5131 } 5132 } 5133 5134 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5135 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5136 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5137 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5138 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5139 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5140 5141 ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n", 5142 __func__, type->sadb_x_nat_t_type_type, 5143 ntohs(sport->sadb_x_nat_t_port_port), 5144 ntohs(dport->sadb_x_nat_t_port_port))); 5145 5146 sav->natt_type = type->sadb_x_nat_t_type_type; 5147 key_porttosaddr(&sav->sah->saidx.src, 5148 sport->sadb_x_nat_t_port_port); 5149 key_porttosaddr(&sav->sah->saidx.dst, 5150 dport->sadb_x_nat_t_port_port); 5151 if (frag) 5152 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5153 else 5154 sav->esp_frag = IP_MAXPACKET; 5155 5156 return 0; 5157 bad: 5158 ipseclog((LOG_DEBUG, "%s: invalid message %s\n", __func__, msg)); 5159 __USE(msg); 5160 return -1; 5161 } 5162 5163 /* Just update the IPSEC_NAT_T ports if present */ 5164 static int 5165 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5166 const struct sadb_msghdr *mhp) 5167 { 5168 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5169 ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n", __func__)); 5170 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5171 ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n", __func__)); 5172 5173 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5174 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5175 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5176 struct sadb_x_nat_t_type *type; 5177 struct sadb_x_nat_t_port *sport; 5178 struct sadb_x_nat_t_port *dport; 5179 5180 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5181 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5182 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5183 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5184 __func__)); 5185 return -1; 5186 } 5187 5188 type = (struct sadb_x_nat_t_type *) 5189 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5190 sport = (struct sadb_x_nat_t_port *) 5191 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5192 dport = (struct sadb_x_nat_t_port *) 5193 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5194 5195 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5196 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5197 5198 ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n", 5199 __func__, type->sadb_x_nat_t_type_type, 5200 ntohs(sport->sadb_x_nat_t_port_port), 5201 ntohs(dport->sadb_x_nat_t_port_port))); 5202 } 5203 5204 return 0; 5205 } 5206 5207 5208 /* 5209 * SADB_UPDATE processing 5210 * receive 5211 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5212 * key(AE), (identity(SD),) (sensitivity)> 5213 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5214 * and send 5215 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5216 * (identity(SD),) (sensitivity)> 5217 * to the ikmpd. 5218 * 5219 * m will always be freed. 5220 */ 5221 static int 5222 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5223 { 5224 struct sadb_sa *sa0; 5225 struct sadb_address *src0, *dst0; 5226 struct secasindex saidx; 5227 struct secashead *sah; 5228 struct secasvar *sav; 5229 u_int16_t proto; 5230 u_int8_t mode; 5231 u_int16_t reqid; 5232 int error; 5233 5234 /* sanity check */ 5235 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5236 panic("key_update: NULL pointer is passed"); 5237 5238 /* map satype to proto */ 5239 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5240 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 5241 return key_senderror(so, m, EINVAL); 5242 } 5243 5244 if (mhp->ext[SADB_EXT_SA] == NULL || 5245 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5246 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5247 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5248 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5249 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5250 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5251 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5252 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5253 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5254 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5255 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5256 return key_senderror(so, m, EINVAL); 5257 } 5258 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5259 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5260 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5261 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5262 return key_senderror(so, m, EINVAL); 5263 } 5264 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5265 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5266 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5267 } else { 5268 mode = IPSEC_MODE_ANY; 5269 reqid = 0; 5270 } 5271 /* XXX boundary checking for other extensions */ 5272 5273 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5274 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5275 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5276 5277 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5278 dst0 + 1, &saidx)) != 0) 5279 return key_senderror(so, m, EINVAL); 5280 5281 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5282 return key_senderror(so, m, EINVAL); 5283 5284 /* get a SA header */ 5285 if ((sah = key_getsah(&saidx)) == NULL) { 5286 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 5287 return key_senderror(so, m, ENOENT); 5288 } 5289 5290 /* set spidx if there */ 5291 /* XXX rewrite */ 5292 error = key_setident(sah, m, mhp); 5293 if (error) 5294 return key_senderror(so, m, error); 5295 5296 /* find a SA with sequence number. */ 5297 #ifdef IPSEC_DOSEQCHECK 5298 if (mhp->msg->sadb_msg_seq != 0 5299 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5300 ipseclog((LOG_DEBUG, 5301 "key_update: no larval SA with sequence %u exists.\n", 5302 mhp->msg->sadb_msg_seq)); 5303 return key_senderror(so, m, ENOENT); 5304 } 5305 #else 5306 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 5307 ipseclog((LOG_DEBUG, 5308 "key_update: no such a SA found (spi:%u)\n", 5309 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5310 return key_senderror(so, m, EINVAL); 5311 } 5312 #endif 5313 5314 /* validity check */ 5315 if (sav->sah->saidx.proto != proto) { 5316 ipseclog((LOG_DEBUG, 5317 "key_update: protocol mismatched (DB=%u param=%u)\n", 5318 sav->sah->saidx.proto, proto)); 5319 return key_senderror(so, m, EINVAL); 5320 } 5321 #ifdef IPSEC_DOSEQCHECK 5322 if (sav->spi != sa0->sadb_sa_spi) { 5323 ipseclog((LOG_DEBUG, 5324 "key_update: SPI mismatched (DB:%u param:%u)\n", 5325 (u_int32_t)ntohl(sav->spi), 5326 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5327 return key_senderror(so, m, EINVAL); 5328 } 5329 #endif 5330 if (sav->pid != mhp->msg->sadb_msg_pid) { 5331 ipseclog((LOG_DEBUG, 5332 "key_update: pid mismatched (DB:%u param:%u)\n", 5333 sav->pid, mhp->msg->sadb_msg_pid)); 5334 return key_senderror(so, m, EINVAL); 5335 } 5336 5337 /* copy sav values */ 5338 error = key_setsaval(sav, m, mhp); 5339 if (error) { 5340 KEY_FREESAV(&sav); 5341 return key_senderror(so, m, error); 5342 } 5343 5344 if ((error = key_handle_natt_info(sav,mhp)) != 0) 5345 return key_senderror(so, m, EINVAL); 5346 5347 /* check SA values to be mature. */ 5348 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5349 KEY_FREESAV(&sav); 5350 return key_senderror(so, m, 0); 5351 } 5352 5353 { 5354 struct mbuf *n; 5355 5356 /* set msg buf from mhp */ 5357 n = key_getmsgbuf_x1(m, mhp); 5358 if (n == NULL) { 5359 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5360 return key_senderror(so, m, ENOBUFS); 5361 } 5362 5363 m_freem(m); 5364 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5365 } 5366 } 5367 5368 /* 5369 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5370 * only called by key_update(). 5371 * OUT: 5372 * NULL : not found 5373 * others : found, pointer to a SA. 5374 */ 5375 #ifdef IPSEC_DOSEQCHECK 5376 static struct secasvar * 5377 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5378 { 5379 struct secasvar *sav; 5380 u_int state; 5381 5382 state = SADB_SASTATE_LARVAL; 5383 5384 /* search SAD with sequence number ? */ 5385 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5386 5387 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5388 5389 if (sav->seq == seq) { 5390 SA_ADDREF(sav); 5391 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5392 printf("DP %s cause refcnt++:%d SA:%p\n", 5393 __func__, sav->refcnt, sav)); 5394 return sav; 5395 } 5396 } 5397 5398 return NULL; 5399 } 5400 #endif 5401 5402 /* 5403 * SADB_ADD processing 5404 * add an entry to SA database, when received 5405 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5406 * key(AE), (identity(SD),) (sensitivity)> 5407 * from the ikmpd, 5408 * and send 5409 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5410 * (identity(SD),) (sensitivity)> 5411 * to the ikmpd. 5412 * 5413 * IGNORE identity and sensitivity messages. 5414 * 5415 * m will always be freed. 5416 */ 5417 static int 5418 key_add(struct socket *so, struct mbuf *m, 5419 const struct sadb_msghdr *mhp) 5420 { 5421 struct sadb_sa *sa0; 5422 struct sadb_address *src0, *dst0; 5423 struct secasindex saidx; 5424 struct secashead *newsah; 5425 struct secasvar *newsav; 5426 u_int16_t proto; 5427 u_int8_t mode; 5428 u_int16_t reqid; 5429 int error; 5430 5431 /* sanity check */ 5432 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5433 panic("key_add: NULL pointer is passed"); 5434 5435 /* map satype to proto */ 5436 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5437 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5438 return key_senderror(so, m, EINVAL); 5439 } 5440 5441 if (mhp->ext[SADB_EXT_SA] == NULL || 5442 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5443 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5444 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5445 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5446 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5447 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5448 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5449 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5450 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5451 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5452 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5453 return key_senderror(so, m, EINVAL); 5454 } 5455 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5456 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5457 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5458 /* XXX need more */ 5459 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5460 return key_senderror(so, m, EINVAL); 5461 } 5462 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5463 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5464 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5465 } else { 5466 mode = IPSEC_MODE_ANY; 5467 reqid = 0; 5468 } 5469 5470 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5471 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5472 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5473 5474 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5475 dst0 + 1, &saidx)) != 0) 5476 return key_senderror(so, m, EINVAL); 5477 5478 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5479 return key_senderror(so, m, EINVAL); 5480 5481 /* get a SA header */ 5482 if ((newsah = key_getsah(&saidx)) == NULL) { 5483 /* create a new SA header */ 5484 if ((newsah = key_newsah(&saidx)) == NULL) { 5485 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5486 return key_senderror(so, m, ENOBUFS); 5487 } 5488 } 5489 5490 /* set spidx if there */ 5491 /* XXX rewrite */ 5492 error = key_setident(newsah, m, mhp); 5493 if (error) { 5494 return key_senderror(so, m, error); 5495 } 5496 5497 /* create new SA entry. */ 5498 /* We can create new SA only if SPI is differenct. */ 5499 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5500 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5501 return key_senderror(so, m, EEXIST); 5502 } 5503 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5504 if (newsav == NULL) { 5505 return key_senderror(so, m, error); 5506 } 5507 5508 if ((error = key_handle_natt_info(newsav, mhp)) != 0) 5509 return key_senderror(so, m, EINVAL); 5510 5511 /* check SA values to be mature. */ 5512 if ((error = key_mature(newsav)) != 0) { 5513 KEY_FREESAV(&newsav); 5514 return key_senderror(so, m, error); 5515 } 5516 5517 /* 5518 * don't call key_freesav() here, as we would like to keep the SA 5519 * in the database on success. 5520 */ 5521 5522 { 5523 struct mbuf *n; 5524 5525 /* set msg buf from mhp */ 5526 n = key_getmsgbuf_x1(m, mhp); 5527 if (n == NULL) { 5528 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5529 return key_senderror(so, m, ENOBUFS); 5530 } 5531 5532 m_freem(m); 5533 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5534 } 5535 } 5536 5537 /* m is retained */ 5538 static int 5539 key_setident(struct secashead *sah, struct mbuf *m, 5540 const struct sadb_msghdr *mhp) 5541 { 5542 const struct sadb_ident *idsrc, *iddst; 5543 int idsrclen, iddstlen; 5544 5545 /* sanity check */ 5546 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5547 panic("key_setident: NULL pointer is passed"); 5548 5549 /* don't make buffer if not there */ 5550 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5551 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5552 sah->idents = NULL; 5553 sah->identd = NULL; 5554 return 0; 5555 } 5556 5557 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5558 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5559 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5560 return EINVAL; 5561 } 5562 5563 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5564 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5565 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5566 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5567 5568 /* validity check */ 5569 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5570 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5571 return EINVAL; 5572 } 5573 5574 switch (idsrc->sadb_ident_type) { 5575 case SADB_IDENTTYPE_PREFIX: 5576 case SADB_IDENTTYPE_FQDN: 5577 case SADB_IDENTTYPE_USERFQDN: 5578 default: 5579 /* XXX do nothing */ 5580 sah->idents = NULL; 5581 sah->identd = NULL; 5582 return 0; 5583 } 5584 5585 /* make structure */ 5586 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5587 if (sah->idents == NULL) { 5588 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5589 return ENOBUFS; 5590 } 5591 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5592 if (sah->identd == NULL) { 5593 KFREE(sah->idents); 5594 sah->idents = NULL; 5595 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5596 return ENOBUFS; 5597 } 5598 memcpy(sah->idents, idsrc, idsrclen); 5599 memcpy(sah->identd, iddst, iddstlen); 5600 5601 return 0; 5602 } 5603 5604 /* 5605 * m will not be freed on return. 5606 * it is caller's responsibility to free the result. 5607 */ 5608 static struct mbuf * 5609 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5610 { 5611 struct mbuf *n; 5612 5613 /* sanity check */ 5614 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5615 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5616 5617 /* create new sadb_msg to reply. */ 5618 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5619 SADB_EXT_SA, SADB_X_EXT_SA2, 5620 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5621 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5622 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5623 if (!n) 5624 return NULL; 5625 5626 if (n->m_len < sizeof(struct sadb_msg)) { 5627 n = m_pullup(n, sizeof(struct sadb_msg)); 5628 if (n == NULL) 5629 return NULL; 5630 } 5631 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5632 mtod(n, struct sadb_msg *)->sadb_msg_len = 5633 PFKEY_UNIT64(n->m_pkthdr.len); 5634 5635 return n; 5636 } 5637 5638 static int key_delete_all (struct socket *, struct mbuf *, 5639 const struct sadb_msghdr *, u_int16_t); 5640 5641 /* 5642 * SADB_DELETE processing 5643 * receive 5644 * <base, SA(*), address(SD)> 5645 * from the ikmpd, and set SADB_SASTATE_DEAD, 5646 * and send, 5647 * <base, SA(*), address(SD)> 5648 * to the ikmpd. 5649 * 5650 * m will always be freed. 5651 */ 5652 static int 5653 key_delete(struct socket *so, struct mbuf *m, 5654 const struct sadb_msghdr *mhp) 5655 { 5656 struct sadb_sa *sa0; 5657 struct sadb_address *src0, *dst0; 5658 struct secasindex saidx; 5659 struct secashead *sah; 5660 struct secasvar *sav = NULL; 5661 u_int16_t proto; 5662 int error; 5663 5664 /* sanity check */ 5665 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5666 panic("key_delete: NULL pointer is passed"); 5667 5668 /* map satype to proto */ 5669 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5670 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5671 return key_senderror(so, m, EINVAL); 5672 } 5673 5674 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5675 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5676 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5677 return key_senderror(so, m, EINVAL); 5678 } 5679 5680 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5681 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5682 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5683 return key_senderror(so, m, EINVAL); 5684 } 5685 5686 if (mhp->ext[SADB_EXT_SA] == NULL) { 5687 /* 5688 * Caller wants us to delete all non-LARVAL SAs 5689 * that match the src/dst. This is used during 5690 * IKE INITIAL-CONTACT. 5691 */ 5692 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5693 return key_delete_all(so, m, mhp, proto); 5694 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5695 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5696 return key_senderror(so, m, EINVAL); 5697 } 5698 5699 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5700 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5701 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5702 5703 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5704 dst0 + 1, &saidx)) != 0) 5705 return key_senderror(so, m, EINVAL); 5706 5707 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5708 return key_senderror(so, m, EINVAL); 5709 5710 /* get a SA header */ 5711 LIST_FOREACH(sah, &sahtree, chain) { 5712 if (sah->state == SADB_SASTATE_DEAD) 5713 continue; 5714 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5715 continue; 5716 5717 /* get a SA with SPI. */ 5718 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5719 if (sav) 5720 break; 5721 } 5722 if (sah == NULL) { 5723 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5724 return key_senderror(so, m, ENOENT); 5725 } 5726 5727 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5728 KEY_FREESAV(&sav); 5729 5730 { 5731 struct mbuf *n; 5732 struct sadb_msg *newmsg; 5733 5734 /* create new sadb_msg to reply. */ 5735 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5736 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5737 if (!n) 5738 return key_senderror(so, m, ENOBUFS); 5739 5740 if (n->m_len < sizeof(struct sadb_msg)) { 5741 n = m_pullup(n, sizeof(struct sadb_msg)); 5742 if (n == NULL) 5743 return key_senderror(so, m, ENOBUFS); 5744 } 5745 newmsg = mtod(n, struct sadb_msg *); 5746 newmsg->sadb_msg_errno = 0; 5747 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5748 5749 m_freem(m); 5750 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5751 } 5752 } 5753 5754 /* 5755 * delete all SAs for src/dst. Called from key_delete(). 5756 */ 5757 static int 5758 key_delete_all(struct socket *so, struct mbuf *m, 5759 const struct sadb_msghdr *mhp, u_int16_t proto) 5760 { 5761 struct sadb_address *src0, *dst0; 5762 struct secasindex saidx; 5763 struct secashead *sah; 5764 struct secasvar *sav, *nextsav; 5765 u_int stateidx, state; 5766 int error; 5767 5768 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5769 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5770 5771 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5772 dst0 + 1, &saidx)) != 0) 5773 return key_senderror(so, m, EINVAL); 5774 5775 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5776 return key_senderror(so, m, EINVAL); 5777 5778 LIST_FOREACH(sah, &sahtree, chain) { 5779 if (sah->state == SADB_SASTATE_DEAD) 5780 continue; 5781 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5782 continue; 5783 5784 /* Delete all non-LARVAL SAs. */ 5785 for (stateidx = 0; 5786 stateidx < _ARRAYLEN(saorder_state_alive); 5787 stateidx++) { 5788 state = saorder_state_alive[stateidx]; 5789 if (state == SADB_SASTATE_LARVAL) 5790 continue; 5791 for (sav = LIST_FIRST(&sah->savtree[state]); 5792 sav != NULL; sav = nextsav) { 5793 nextsav = LIST_NEXT(sav, chain); 5794 /* sanity check */ 5795 if (sav->state != state) { 5796 ipseclog((LOG_DEBUG, "key_delete_all: " 5797 "invalid sav->state " 5798 "(queue: %d SA: %d)\n", 5799 state, sav->state)); 5800 continue; 5801 } 5802 5803 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5804 KEY_FREESAV(&sav); 5805 } 5806 } 5807 } 5808 { 5809 struct mbuf *n; 5810 struct sadb_msg *newmsg; 5811 5812 /* create new sadb_msg to reply. */ 5813 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5814 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5815 if (!n) 5816 return key_senderror(so, m, ENOBUFS); 5817 5818 if (n->m_len < sizeof(struct sadb_msg)) { 5819 n = m_pullup(n, sizeof(struct sadb_msg)); 5820 if (n == NULL) 5821 return key_senderror(so, m, ENOBUFS); 5822 } 5823 newmsg = mtod(n, struct sadb_msg *); 5824 newmsg->sadb_msg_errno = 0; 5825 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5826 5827 m_freem(m); 5828 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5829 } 5830 } 5831 5832 /* 5833 * SADB_GET processing 5834 * receive 5835 * <base, SA(*), address(SD)> 5836 * from the ikmpd, and get a SP and a SA to respond, 5837 * and send, 5838 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5839 * (identity(SD),) (sensitivity)> 5840 * to the ikmpd. 5841 * 5842 * m will always be freed. 5843 */ 5844 static int 5845 key_get(struct socket *so, struct mbuf *m, 5846 const struct sadb_msghdr *mhp) 5847 { 5848 struct sadb_sa *sa0; 5849 struct sadb_address *src0, *dst0; 5850 struct secasindex saidx; 5851 struct secashead *sah; 5852 struct secasvar *sav = NULL; 5853 u_int16_t proto; 5854 int error; 5855 5856 /* sanity check */ 5857 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5858 panic("key_get: NULL pointer is passed"); 5859 5860 /* map satype to proto */ 5861 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5862 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5863 return key_senderror(so, m, EINVAL); 5864 } 5865 5866 if (mhp->ext[SADB_EXT_SA] == NULL || 5867 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5868 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5869 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5870 return key_senderror(so, m, EINVAL); 5871 } 5872 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5873 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5874 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5875 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5876 return key_senderror(so, m, EINVAL); 5877 } 5878 5879 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5880 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5881 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5882 5883 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5884 dst0 + 1, &saidx)) != 0) 5885 return key_senderror(so, m, EINVAL); 5886 5887 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5888 return key_senderror(so, m, EINVAL); 5889 5890 /* get a SA header */ 5891 LIST_FOREACH(sah, &sahtree, chain) { 5892 if (sah->state == SADB_SASTATE_DEAD) 5893 continue; 5894 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5895 continue; 5896 5897 /* get a SA with SPI. */ 5898 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5899 if (sav) 5900 break; 5901 } 5902 if (sah == NULL) { 5903 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5904 return key_senderror(so, m, ENOENT); 5905 } 5906 5907 { 5908 struct mbuf *n; 5909 u_int8_t satype; 5910 5911 /* map proto to satype */ 5912 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5913 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5914 return key_senderror(so, m, EINVAL); 5915 } 5916 5917 /* create new sadb_msg to reply. */ 5918 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5919 mhp->msg->sadb_msg_pid); 5920 if (!n) 5921 return key_senderror(so, m, ENOBUFS); 5922 5923 m_freem(m); 5924 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5925 } 5926 } 5927 5928 /* XXX make it sysctl-configurable? */ 5929 static void 5930 key_getcomb_setlifetime(struct sadb_comb *comb) 5931 { 5932 5933 comb->sadb_comb_soft_allocations = 1; 5934 comb->sadb_comb_hard_allocations = 1; 5935 comb->sadb_comb_soft_bytes = 0; 5936 comb->sadb_comb_hard_bytes = 0; 5937 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5938 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5939 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5940 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5941 } 5942 5943 /* 5944 * XXX reorder combinations by preference 5945 * XXX no idea if the user wants ESP authentication or not 5946 */ 5947 static struct mbuf * 5948 key_getcomb_esp(void) 5949 { 5950 struct sadb_comb *comb; 5951 const struct enc_xform *algo; 5952 struct mbuf *result = NULL, *m, *n; 5953 int encmin; 5954 int i, off, o; 5955 int totlen; 5956 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5957 5958 m = NULL; 5959 for (i = 1; i <= SADB_EALG_MAX; i++) { 5960 algo = esp_algorithm_lookup(i); 5961 if (algo == NULL) 5962 continue; 5963 5964 /* discard algorithms with key size smaller than system min */ 5965 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5966 continue; 5967 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5968 encmin = ipsec_esp_keymin; 5969 else 5970 encmin = _BITS(algo->minkey); 5971 5972 if (ipsec_esp_auth) 5973 m = key_getcomb_ah(); 5974 else { 5975 IPSEC_ASSERT(l <= MLEN, 5976 ("key_getcomb_esp: l=%u > MLEN=%lu", 5977 l, (u_long) MLEN)); 5978 MGET(m, M_DONTWAIT, MT_DATA); 5979 if (m) { 5980 M_ALIGN(m, l); 5981 m->m_len = l; 5982 m->m_next = NULL; 5983 memset(mtod(m, void *), 0, m->m_len); 5984 } 5985 } 5986 if (!m) 5987 goto fail; 5988 5989 totlen = 0; 5990 for (n = m; n; n = n->m_next) 5991 totlen += n->m_len; 5992 IPSEC_ASSERT((totlen % l) == 0, 5993 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 5994 5995 for (off = 0; off < totlen; off += l) { 5996 n = m_pulldown(m, off, l, &o); 5997 if (!n) { 5998 /* m is already freed */ 5999 goto fail; 6000 } 6001 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6002 memset(comb, 0, sizeof(*comb)); 6003 key_getcomb_setlifetime(comb); 6004 comb->sadb_comb_encrypt = i; 6005 comb->sadb_comb_encrypt_minbits = encmin; 6006 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6007 } 6008 6009 if (!result) 6010 result = m; 6011 else 6012 m_cat(result, m); 6013 } 6014 6015 return result; 6016 6017 fail: 6018 if (result) 6019 m_freem(result); 6020 return NULL; 6021 } 6022 6023 static void 6024 key_getsizes_ah(const struct auth_hash *ah, int alg, 6025 u_int16_t* ksmin, u_int16_t* ksmax) 6026 { 6027 *ksmin = *ksmax = ah->keysize; 6028 if (ah->keysize == 0) { 6029 /* 6030 * Transform takes arbitrary key size but algorithm 6031 * key size is restricted. Enforce this here. 6032 */ 6033 switch (alg) { 6034 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6035 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6036 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 6037 default: 6038 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 6039 alg)); 6040 break; 6041 } 6042 } 6043 } 6044 6045 /* 6046 * XXX reorder combinations by preference 6047 */ 6048 static struct mbuf * 6049 key_getcomb_ah(void) 6050 { 6051 struct sadb_comb *comb; 6052 const struct auth_hash *algo; 6053 struct mbuf *m; 6054 u_int16_t minkeysize, maxkeysize; 6055 int i; 6056 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6057 6058 m = NULL; 6059 for (i = 1; i <= SADB_AALG_MAX; i++) { 6060 #if 1 6061 /* we prefer HMAC algorithms, not old algorithms */ 6062 if (i != SADB_AALG_SHA1HMAC && 6063 i != SADB_AALG_MD5HMAC && 6064 i != SADB_X_AALG_SHA2_256 && 6065 i != SADB_X_AALG_SHA2_384 && 6066 i != SADB_X_AALG_SHA2_512) 6067 continue; 6068 #endif 6069 algo = ah_algorithm_lookup(i); 6070 if (!algo) 6071 continue; 6072 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6073 /* discard algorithms with key size smaller than system min */ 6074 if (_BITS(minkeysize) < ipsec_ah_keymin) 6075 continue; 6076 6077 if (!m) { 6078 IPSEC_ASSERT(l <= MLEN, 6079 ("key_getcomb_ah: l=%u > MLEN=%lu", 6080 l, (u_long) MLEN)); 6081 MGET(m, M_DONTWAIT, MT_DATA); 6082 if (m) { 6083 M_ALIGN(m, l); 6084 m->m_len = l; 6085 m->m_next = NULL; 6086 } 6087 } else 6088 M_PREPEND(m, l, M_DONTWAIT); 6089 if (!m) 6090 return NULL; 6091 6092 comb = mtod(m, struct sadb_comb *); 6093 memset(comb, 0, sizeof(*comb)); 6094 key_getcomb_setlifetime(comb); 6095 comb->sadb_comb_auth = i; 6096 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6097 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6098 } 6099 6100 return m; 6101 } 6102 6103 /* 6104 * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 6105 * XXX reorder combinations by preference 6106 */ 6107 static struct mbuf * 6108 key_getcomb_ipcomp(void) 6109 { 6110 struct sadb_comb *comb; 6111 const struct comp_algo *algo; 6112 struct mbuf *m; 6113 int i; 6114 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6115 6116 m = NULL; 6117 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6118 algo = ipcomp_algorithm_lookup(i); 6119 if (!algo) 6120 continue; 6121 6122 if (!m) { 6123 IPSEC_ASSERT(l <= MLEN, 6124 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 6125 l, (u_long) MLEN)); 6126 MGET(m, M_DONTWAIT, MT_DATA); 6127 if (m) { 6128 M_ALIGN(m, l); 6129 m->m_len = l; 6130 m->m_next = NULL; 6131 } 6132 } else 6133 M_PREPEND(m, l, M_DONTWAIT); 6134 if (!m) 6135 return NULL; 6136 6137 comb = mtod(m, struct sadb_comb *); 6138 memset(comb, 0, sizeof(*comb)); 6139 key_getcomb_setlifetime(comb); 6140 comb->sadb_comb_encrypt = i; 6141 /* what should we set into sadb_comb_*_{min,max}bits? */ 6142 } 6143 6144 return m; 6145 } 6146 6147 /* 6148 * XXX no way to pass mode (transport/tunnel) to userland 6149 * XXX replay checking? 6150 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6151 */ 6152 static struct mbuf * 6153 key_getprop(const struct secasindex *saidx) 6154 { 6155 struct sadb_prop *prop; 6156 struct mbuf *m, *n; 6157 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6158 int totlen; 6159 6160 switch (saidx->proto) { 6161 case IPPROTO_ESP: 6162 m = key_getcomb_esp(); 6163 break; 6164 case IPPROTO_AH: 6165 m = key_getcomb_ah(); 6166 break; 6167 case IPPROTO_IPCOMP: 6168 m = key_getcomb_ipcomp(); 6169 break; 6170 default: 6171 return NULL; 6172 } 6173 6174 if (!m) 6175 return NULL; 6176 M_PREPEND(m, l, M_DONTWAIT); 6177 if (!m) 6178 return NULL; 6179 6180 totlen = 0; 6181 for (n = m; n; n = n->m_next) 6182 totlen += n->m_len; 6183 6184 prop = mtod(m, struct sadb_prop *); 6185 memset(prop, 0, sizeof(*prop)); 6186 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6187 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6188 prop->sadb_prop_replay = 32; /* XXX */ 6189 6190 return m; 6191 } 6192 6193 /* 6194 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6195 * send 6196 * <base, SA, address(SD), (address(P)), x_policy, 6197 * (identity(SD),) (sensitivity,) proposal> 6198 * to KMD, and expect to receive 6199 * <base> with SADB_ACQUIRE if error occurred, 6200 * or 6201 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6202 * from KMD by PF_KEY. 6203 * 6204 * XXX x_policy is outside of RFC2367 (KAME extension). 6205 * XXX sensitivity is not supported. 6206 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6207 * see comment for key_getcomb_ipcomp(). 6208 * 6209 * OUT: 6210 * 0 : succeed 6211 * others: error number 6212 */ 6213 static int 6214 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6215 { 6216 struct mbuf *result = NULL, *m; 6217 #ifndef IPSEC_NONBLOCK_ACQUIRE 6218 struct secacq *newacq; 6219 #endif 6220 u_int8_t satype; 6221 int error = -1; 6222 u_int32_t seq; 6223 6224 /* sanity check */ 6225 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 6226 satype = key_proto2satype(saidx->proto); 6227 IPSEC_ASSERT(satype != 0, 6228 ("key_acquire: null satype, protocol %u", saidx->proto)); 6229 6230 #ifndef IPSEC_NONBLOCK_ACQUIRE 6231 /* 6232 * We never do anything about acquirng SA. There is anather 6233 * solution that kernel blocks to send SADB_ACQUIRE message until 6234 * getting something message from IKEd. In later case, to be 6235 * managed with ACQUIRING list. 6236 */ 6237 /* Get an entry to check whether sending message or not. */ 6238 if ((newacq = key_getacq(saidx)) != NULL) { 6239 if (key_blockacq_count < newacq->count) { 6240 /* reset counter and do send message. */ 6241 newacq->count = 0; 6242 } else { 6243 /* increment counter and do nothing. */ 6244 newacq->count++; 6245 return 0; 6246 } 6247 } else { 6248 /* make new entry for blocking to send SADB_ACQUIRE. */ 6249 if ((newacq = key_newacq(saidx)) == NULL) 6250 return ENOBUFS; 6251 6252 /* add to acqtree */ 6253 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6254 } 6255 #endif 6256 6257 6258 #ifndef IPSEC_NONBLOCK_ACQUIRE 6259 seq = newacq->seq; 6260 #else 6261 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6262 #endif 6263 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6264 if (!m) { 6265 error = ENOBUFS; 6266 goto fail; 6267 } 6268 result = m; 6269 6270 /* set sadb_address for saidx's. */ 6271 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6272 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6273 if (!m) { 6274 error = ENOBUFS; 6275 goto fail; 6276 } 6277 m_cat(result, m); 6278 6279 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6280 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6281 if (!m) { 6282 error = ENOBUFS; 6283 goto fail; 6284 } 6285 m_cat(result, m); 6286 6287 /* XXX proxy address (optional) */ 6288 6289 /* set sadb_x_policy */ 6290 if (sp) { 6291 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6292 if (!m) { 6293 error = ENOBUFS; 6294 goto fail; 6295 } 6296 m_cat(result, m); 6297 } 6298 6299 /* XXX identity (optional) */ 6300 #if 0 6301 if (idexttype && fqdn) { 6302 /* create identity extension (FQDN) */ 6303 struct sadb_ident *id; 6304 int fqdnlen; 6305 6306 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6307 id = (struct sadb_ident *)p; 6308 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6309 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6310 id->sadb_ident_exttype = idexttype; 6311 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6312 memcpy(id + 1, fqdn, fqdnlen); 6313 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6314 } 6315 6316 if (idexttype) { 6317 /* create identity extension (USERFQDN) */ 6318 struct sadb_ident *id; 6319 int userfqdnlen; 6320 6321 if (userfqdn) { 6322 /* +1 for terminating-NUL */ 6323 userfqdnlen = strlen(userfqdn) + 1; 6324 } else 6325 userfqdnlen = 0; 6326 id = (struct sadb_ident *)p; 6327 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6328 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6329 id->sadb_ident_exttype = idexttype; 6330 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6331 /* XXX is it correct? */ 6332 if (curlwp) 6333 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6334 if (userfqdn && userfqdnlen) 6335 memcpy(id + 1, userfqdn, userfqdnlen); 6336 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6337 } 6338 #endif 6339 6340 /* XXX sensitivity (optional) */ 6341 6342 /* create proposal/combination extension */ 6343 m = key_getprop(saidx); 6344 #if 0 6345 /* 6346 * spec conformant: always attach proposal/combination extension, 6347 * the problem is that we have no way to attach it for ipcomp, 6348 * due to the way sadb_comb is declared in RFC2367. 6349 */ 6350 if (!m) { 6351 error = ENOBUFS; 6352 goto fail; 6353 } 6354 m_cat(result, m); 6355 #else 6356 /* 6357 * outside of spec; make proposal/combination extension optional. 6358 */ 6359 if (m) 6360 m_cat(result, m); 6361 #endif 6362 6363 if ((result->m_flags & M_PKTHDR) == 0) { 6364 error = EINVAL; 6365 goto fail; 6366 } 6367 6368 if (result->m_len < sizeof(struct sadb_msg)) { 6369 result = m_pullup(result, sizeof(struct sadb_msg)); 6370 if (result == NULL) { 6371 error = ENOBUFS; 6372 goto fail; 6373 } 6374 } 6375 6376 result->m_pkthdr.len = 0; 6377 for (m = result; m; m = m->m_next) 6378 result->m_pkthdr.len += m->m_len; 6379 6380 mtod(result, struct sadb_msg *)->sadb_msg_len = 6381 PFKEY_UNIT64(result->m_pkthdr.len); 6382 6383 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6384 6385 fail: 6386 if (result) 6387 m_freem(result); 6388 return error; 6389 } 6390 6391 #ifndef IPSEC_NONBLOCK_ACQUIRE 6392 static struct secacq * 6393 key_newacq(const struct secasindex *saidx) 6394 { 6395 struct secacq *newacq; 6396 6397 /* get new entry */ 6398 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6399 if (newacq == NULL) { 6400 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6401 return NULL; 6402 } 6403 memset(newacq, 0, sizeof(*newacq)); 6404 6405 /* copy secindex */ 6406 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6407 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6408 newacq->created = time_uptime; 6409 newacq->count = 0; 6410 6411 return newacq; 6412 } 6413 6414 static struct secacq * 6415 key_getacq(const struct secasindex *saidx) 6416 { 6417 struct secacq *acq; 6418 6419 LIST_FOREACH(acq, &acqtree, chain) { 6420 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6421 return acq; 6422 } 6423 6424 return NULL; 6425 } 6426 6427 static struct secacq * 6428 key_getacqbyseq(u_int32_t seq) 6429 { 6430 struct secacq *acq; 6431 6432 LIST_FOREACH(acq, &acqtree, chain) { 6433 if (acq->seq == seq) 6434 return acq; 6435 } 6436 6437 return NULL; 6438 } 6439 #endif 6440 6441 static struct secspacq * 6442 key_newspacq(const struct secpolicyindex *spidx) 6443 { 6444 struct secspacq *acq; 6445 6446 /* get new entry */ 6447 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6448 if (acq == NULL) { 6449 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6450 return NULL; 6451 } 6452 memset(acq, 0, sizeof(*acq)); 6453 6454 /* copy secindex */ 6455 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6456 acq->created = time_uptime; 6457 acq->count = 0; 6458 6459 return acq; 6460 } 6461 6462 static struct secspacq * 6463 key_getspacq(const struct secpolicyindex *spidx) 6464 { 6465 struct secspacq *acq; 6466 6467 LIST_FOREACH(acq, &spacqtree, chain) { 6468 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6469 return acq; 6470 } 6471 6472 return NULL; 6473 } 6474 6475 /* 6476 * SADB_ACQUIRE processing, 6477 * in first situation, is receiving 6478 * <base> 6479 * from the ikmpd, and clear sequence of its secasvar entry. 6480 * 6481 * In second situation, is receiving 6482 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6483 * from a user land process, and return 6484 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6485 * to the socket. 6486 * 6487 * m will always be freed. 6488 */ 6489 static int 6490 key_acquire2(struct socket *so, struct mbuf *m, 6491 const struct sadb_msghdr *mhp) 6492 { 6493 const struct sadb_address *src0, *dst0; 6494 struct secasindex saidx; 6495 struct secashead *sah; 6496 u_int16_t proto; 6497 int error; 6498 6499 /* sanity check */ 6500 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6501 panic("key_acquire2: NULL pointer is passed"); 6502 6503 /* 6504 * Error message from KMd. 6505 * We assume that if error was occurred in IKEd, the length of PFKEY 6506 * message is equal to the size of sadb_msg structure. 6507 * We do not raise error even if error occurred in this function. 6508 */ 6509 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6510 #ifndef IPSEC_NONBLOCK_ACQUIRE 6511 struct secacq *acq; 6512 6513 /* check sequence number */ 6514 if (mhp->msg->sadb_msg_seq == 0) { 6515 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6516 m_freem(m); 6517 return 0; 6518 } 6519 6520 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6521 /* 6522 * the specified larval SA is already gone, or we got 6523 * a bogus sequence number. we can silently ignore it. 6524 */ 6525 m_freem(m); 6526 return 0; 6527 } 6528 6529 /* reset acq counter in order to deletion by timehander. */ 6530 acq->created = time_uptime; 6531 acq->count = 0; 6532 #endif 6533 m_freem(m); 6534 return 0; 6535 } 6536 6537 /* 6538 * This message is from user land. 6539 */ 6540 6541 /* map satype to proto */ 6542 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6543 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6544 return key_senderror(so, m, EINVAL); 6545 } 6546 6547 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6548 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6549 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6550 /* error */ 6551 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6552 return key_senderror(so, m, EINVAL); 6553 } 6554 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6555 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6556 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6557 /* error */ 6558 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6559 return key_senderror(so, m, EINVAL); 6560 } 6561 6562 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6563 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6564 6565 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 6566 dst0 + 1, &saidx)) != 0) 6567 return key_senderror(so, m, EINVAL); 6568 6569 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 6570 return key_senderror(so, m, EINVAL); 6571 6572 /* get a SA index */ 6573 LIST_FOREACH(sah, &sahtree, chain) { 6574 if (sah->state == SADB_SASTATE_DEAD) 6575 continue; 6576 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6577 break; 6578 } 6579 if (sah != NULL) { 6580 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6581 return key_senderror(so, m, EEXIST); 6582 } 6583 6584 error = key_acquire(&saidx, NULL); 6585 if (error != 0) { 6586 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6587 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6588 return key_senderror(so, m, error); 6589 } 6590 6591 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6592 } 6593 6594 /* 6595 * SADB_REGISTER processing. 6596 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6597 * receive 6598 * <base> 6599 * from the ikmpd, and register a socket to send PF_KEY messages, 6600 * and send 6601 * <base, supported> 6602 * to KMD by PF_KEY. 6603 * If socket is detached, must free from regnode. 6604 * 6605 * m will always be freed. 6606 */ 6607 static int 6608 key_register(struct socket *so, struct mbuf *m, 6609 const struct sadb_msghdr *mhp) 6610 { 6611 struct secreg *reg, *newreg = 0; 6612 6613 /* sanity check */ 6614 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6615 panic("key_register: NULL pointer is passed"); 6616 6617 /* check for invalid register message */ 6618 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6619 return key_senderror(so, m, EINVAL); 6620 6621 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6622 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6623 goto setmsg; 6624 6625 /* check whether existing or not */ 6626 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6627 if (reg->so == so) { 6628 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6629 return key_senderror(so, m, EEXIST); 6630 } 6631 } 6632 6633 /* create regnode */ 6634 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6635 if (newreg == NULL) { 6636 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6637 return key_senderror(so, m, ENOBUFS); 6638 } 6639 memset(newreg, 0, sizeof(*newreg)); 6640 6641 newreg->so = so; 6642 ((struct keycb *)sotorawcb(so))->kp_registered++; 6643 6644 /* add regnode to regtree. */ 6645 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6646 6647 setmsg: 6648 { 6649 struct mbuf *n; 6650 struct sadb_msg *newmsg; 6651 struct sadb_supported *sup; 6652 u_int len, alen, elen; 6653 int off; 6654 int i; 6655 struct sadb_alg *alg; 6656 6657 /* create new sadb_msg to reply. */ 6658 alen = 0; 6659 for (i = 1; i <= SADB_AALG_MAX; i++) { 6660 if (ah_algorithm_lookup(i)) 6661 alen += sizeof(struct sadb_alg); 6662 } 6663 if (alen) 6664 alen += sizeof(struct sadb_supported); 6665 elen = 0; 6666 for (i = 1; i <= SADB_EALG_MAX; i++) { 6667 if (esp_algorithm_lookup(i)) 6668 elen += sizeof(struct sadb_alg); 6669 } 6670 if (elen) 6671 elen += sizeof(struct sadb_supported); 6672 6673 len = sizeof(struct sadb_msg) + alen + elen; 6674 6675 if (len > MCLBYTES) 6676 return key_senderror(so, m, ENOBUFS); 6677 6678 MGETHDR(n, M_DONTWAIT, MT_DATA); 6679 if (len > MHLEN) { 6680 MCLGET(n, M_DONTWAIT); 6681 if ((n->m_flags & M_EXT) == 0) { 6682 m_freem(n); 6683 n = NULL; 6684 } 6685 } 6686 if (!n) 6687 return key_senderror(so, m, ENOBUFS); 6688 6689 n->m_pkthdr.len = n->m_len = len; 6690 n->m_next = NULL; 6691 off = 0; 6692 6693 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6694 newmsg = mtod(n, struct sadb_msg *); 6695 newmsg->sadb_msg_errno = 0; 6696 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6697 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6698 6699 /* for authentication algorithm */ 6700 if (alen) { 6701 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6702 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6703 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6704 off += PFKEY_ALIGN8(sizeof(*sup)); 6705 6706 for (i = 1; i <= SADB_AALG_MAX; i++) { 6707 const struct auth_hash *aalgo; 6708 u_int16_t minkeysize, maxkeysize; 6709 6710 aalgo = ah_algorithm_lookup(i); 6711 if (!aalgo) 6712 continue; 6713 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6714 alg->sadb_alg_id = i; 6715 alg->sadb_alg_ivlen = 0; 6716 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6717 alg->sadb_alg_minbits = _BITS(minkeysize); 6718 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6719 off += PFKEY_ALIGN8(sizeof(*alg)); 6720 } 6721 } 6722 6723 /* for encryption algorithm */ 6724 if (elen) { 6725 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6726 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6727 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6728 off += PFKEY_ALIGN8(sizeof(*sup)); 6729 6730 for (i = 1; i <= SADB_EALG_MAX; i++) { 6731 const struct enc_xform *ealgo; 6732 6733 ealgo = esp_algorithm_lookup(i); 6734 if (!ealgo) 6735 continue; 6736 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6737 alg->sadb_alg_id = i; 6738 alg->sadb_alg_ivlen = ealgo->blocksize; 6739 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6740 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6741 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6742 } 6743 } 6744 6745 #ifdef DIAGNOSTIC 6746 if (off != len) 6747 panic("length assumption failed in key_register"); 6748 #endif 6749 6750 m_freem(m); 6751 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6752 } 6753 } 6754 6755 /* 6756 * free secreg entry registered. 6757 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6758 */ 6759 void 6760 key_freereg(struct socket *so) 6761 { 6762 struct secreg *reg; 6763 int i; 6764 6765 /* sanity check */ 6766 if (so == NULL) 6767 panic("key_freereg: NULL pointer is passed"); 6768 6769 /* 6770 * check whether existing or not. 6771 * check all type of SA, because there is a potential that 6772 * one socket is registered to multiple type of SA. 6773 */ 6774 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6775 LIST_FOREACH(reg, ®tree[i], chain) { 6776 if (reg->so == so 6777 && __LIST_CHAINED(reg)) { 6778 LIST_REMOVE(reg, chain); 6779 KFREE(reg); 6780 break; 6781 } 6782 } 6783 } 6784 6785 return; 6786 } 6787 6788 /* 6789 * SADB_EXPIRE processing 6790 * send 6791 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6792 * to KMD by PF_KEY. 6793 * NOTE: We send only soft lifetime extension. 6794 * 6795 * OUT: 0 : succeed 6796 * others : error number 6797 */ 6798 static int 6799 key_expire(struct secasvar *sav) 6800 { 6801 int s; 6802 int satype; 6803 struct mbuf *result = NULL, *m; 6804 int len; 6805 int error = -1; 6806 struct sadb_lifetime *lt; 6807 6808 /* XXX: Why do we lock ? */ 6809 s = splsoftnet(); /*called from softclock()*/ 6810 6811 /* sanity check */ 6812 if (sav == NULL) 6813 panic("key_expire: NULL pointer is passed"); 6814 if (sav->sah == NULL) 6815 panic("key_expire: Why was SA index in SA NULL"); 6816 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6817 panic("key_expire: invalid proto is passed"); 6818 6819 /* set msg header */ 6820 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6821 if (!m) { 6822 error = ENOBUFS; 6823 goto fail; 6824 } 6825 result = m; 6826 6827 /* create SA extension */ 6828 m = key_setsadbsa(sav); 6829 if (!m) { 6830 error = ENOBUFS; 6831 goto fail; 6832 } 6833 m_cat(result, m); 6834 6835 /* create SA extension */ 6836 m = key_setsadbxsa2(sav->sah->saidx.mode, 6837 sav->replay ? sav->replay->count : 0, 6838 sav->sah->saidx.reqid); 6839 if (!m) { 6840 error = ENOBUFS; 6841 goto fail; 6842 } 6843 m_cat(result, m); 6844 6845 /* create lifetime extension (current and soft) */ 6846 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6847 m = key_alloc_mbuf(len); 6848 if (!m || m->m_next) { /*XXX*/ 6849 if (m) 6850 m_freem(m); 6851 error = ENOBUFS; 6852 goto fail; 6853 } 6854 memset(mtod(m, void *), 0, len); 6855 lt = mtod(m, struct sadb_lifetime *); 6856 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6857 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6858 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6859 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6860 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime 6861 + time_second - time_uptime; 6862 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime 6863 + time_second - time_uptime; 6864 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6865 memcpy(lt, sav->lft_s, sizeof(*lt)); 6866 m_cat(result, m); 6867 6868 /* set sadb_address for source */ 6869 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6870 &sav->sah->saidx.src.sa, 6871 FULLMASK, IPSEC_ULPROTO_ANY); 6872 if (!m) { 6873 error = ENOBUFS; 6874 goto fail; 6875 } 6876 m_cat(result, m); 6877 6878 /* set sadb_address for destination */ 6879 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6880 &sav->sah->saidx.dst.sa, 6881 FULLMASK, IPSEC_ULPROTO_ANY); 6882 if (!m) { 6883 error = ENOBUFS; 6884 goto fail; 6885 } 6886 m_cat(result, m); 6887 6888 if ((result->m_flags & M_PKTHDR) == 0) { 6889 error = EINVAL; 6890 goto fail; 6891 } 6892 6893 if (result->m_len < sizeof(struct sadb_msg)) { 6894 result = m_pullup(result, sizeof(struct sadb_msg)); 6895 if (result == NULL) { 6896 error = ENOBUFS; 6897 goto fail; 6898 } 6899 } 6900 6901 result->m_pkthdr.len = 0; 6902 for (m = result; m; m = m->m_next) 6903 result->m_pkthdr.len += m->m_len; 6904 6905 mtod(result, struct sadb_msg *)->sadb_msg_len = 6906 PFKEY_UNIT64(result->m_pkthdr.len); 6907 6908 splx(s); 6909 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6910 6911 fail: 6912 if (result) 6913 m_freem(result); 6914 splx(s); 6915 return error; 6916 } 6917 6918 /* 6919 * SADB_FLUSH processing 6920 * receive 6921 * <base> 6922 * from the ikmpd, and free all entries in secastree. 6923 * and send, 6924 * <base> 6925 * to the ikmpd. 6926 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6927 * 6928 * m will always be freed. 6929 */ 6930 static int 6931 key_flush(struct socket *so, struct mbuf *m, 6932 const struct sadb_msghdr *mhp) 6933 { 6934 struct sadb_msg *newmsg; 6935 struct secashead *sah, *nextsah; 6936 struct secasvar *sav, *nextsav; 6937 u_int16_t proto; 6938 u_int8_t state; 6939 u_int stateidx; 6940 6941 /* sanity check */ 6942 if (so == NULL || mhp == NULL || mhp->msg == NULL) 6943 panic("key_flush: NULL pointer is passed"); 6944 6945 /* map satype to proto */ 6946 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6947 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6948 return key_senderror(so, m, EINVAL); 6949 } 6950 6951 /* no SATYPE specified, i.e. flushing all SA. */ 6952 for (sah = LIST_FIRST(&sahtree); 6953 sah != NULL; 6954 sah = nextsah) { 6955 nextsah = LIST_NEXT(sah, chain); 6956 6957 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6958 && proto != sah->saidx.proto) 6959 continue; 6960 6961 for (stateidx = 0; 6962 stateidx < _ARRAYLEN(saorder_state_alive); 6963 stateidx++) { 6964 state = saorder_state_any[stateidx]; 6965 for (sav = LIST_FIRST(&sah->savtree[state]); 6966 sav != NULL; 6967 sav = nextsav) { 6968 6969 nextsav = LIST_NEXT(sav, chain); 6970 6971 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6972 KEY_FREESAV(&sav); 6973 } 6974 } 6975 6976 sah->state = SADB_SASTATE_DEAD; 6977 } 6978 6979 if (m->m_len < sizeof(struct sadb_msg) || 6980 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6981 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 6982 return key_senderror(so, m, ENOBUFS); 6983 } 6984 6985 if (m->m_next) 6986 m_freem(m->m_next); 6987 m->m_next = NULL; 6988 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6989 newmsg = mtod(m, struct sadb_msg *); 6990 newmsg->sadb_msg_errno = 0; 6991 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6992 6993 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6994 } 6995 6996 6997 static struct mbuf * 6998 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6999 { 7000 struct secashead *sah; 7001 struct secasvar *sav; 7002 u_int16_t proto; 7003 u_int stateidx; 7004 u_int8_t satype; 7005 u_int8_t state; 7006 int cnt; 7007 struct mbuf *m, *n, *prev; 7008 7009 *lenp = 0; 7010 7011 /* map satype to proto */ 7012 if ((proto = key_satype2proto(req_satype)) == 0) { 7013 *errorp = EINVAL; 7014 return (NULL); 7015 } 7016 7017 /* count sav entries to be sent to userland. */ 7018 cnt = 0; 7019 LIST_FOREACH(sah, &sahtree, chain) { 7020 if (req_satype != SADB_SATYPE_UNSPEC && 7021 proto != sah->saidx.proto) 7022 continue; 7023 7024 for (stateidx = 0; 7025 stateidx < _ARRAYLEN(saorder_state_any); 7026 stateidx++) { 7027 state = saorder_state_any[stateidx]; 7028 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7029 cnt++; 7030 } 7031 } 7032 } 7033 7034 if (cnt == 0) { 7035 *errorp = ENOENT; 7036 return (NULL); 7037 } 7038 7039 /* send this to the userland, one at a time. */ 7040 m = NULL; 7041 prev = m; 7042 LIST_FOREACH(sah, &sahtree, chain) { 7043 if (req_satype != SADB_SATYPE_UNSPEC && 7044 proto != sah->saidx.proto) 7045 continue; 7046 7047 /* map proto to satype */ 7048 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7049 m_freem(m); 7050 *errorp = EINVAL; 7051 return (NULL); 7052 } 7053 7054 for (stateidx = 0; 7055 stateidx < _ARRAYLEN(saorder_state_any); 7056 stateidx++) { 7057 state = saorder_state_any[stateidx]; 7058 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7059 n = key_setdumpsa(sav, SADB_DUMP, satype, 7060 --cnt, pid); 7061 if (!n) { 7062 m_freem(m); 7063 *errorp = ENOBUFS; 7064 return (NULL); 7065 } 7066 7067 if (!m) 7068 m = n; 7069 else 7070 prev->m_nextpkt = n; 7071 prev = n; 7072 } 7073 } 7074 } 7075 7076 if (!m) { 7077 *errorp = EINVAL; 7078 return (NULL); 7079 } 7080 7081 if ((m->m_flags & M_PKTHDR) != 0) { 7082 m->m_pkthdr.len = 0; 7083 for (n = m; n; n = n->m_next) 7084 m->m_pkthdr.len += n->m_len; 7085 } 7086 7087 *errorp = 0; 7088 return (m); 7089 } 7090 7091 /* 7092 * SADB_DUMP processing 7093 * dump all entries including status of DEAD in SAD. 7094 * receive 7095 * <base> 7096 * from the ikmpd, and dump all secasvar leaves 7097 * and send, 7098 * <base> ..... 7099 * to the ikmpd. 7100 * 7101 * m will always be freed. 7102 */ 7103 static int 7104 key_dump(struct socket *so, struct mbuf *m0, 7105 const struct sadb_msghdr *mhp) 7106 { 7107 u_int16_t proto; 7108 u_int8_t satype; 7109 struct mbuf *n; 7110 int s; 7111 int error, len, ok; 7112 7113 /* sanity check */ 7114 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 7115 panic("key_dump: NULL pointer is passed"); 7116 7117 /* map satype to proto */ 7118 satype = mhp->msg->sadb_msg_satype; 7119 if ((proto = key_satype2proto(satype)) == 0) { 7120 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 7121 return key_senderror(so, m0, EINVAL); 7122 } 7123 7124 /* 7125 * If the requestor has insufficient socket-buffer space 7126 * for the entire chain, nobody gets any response to the DUMP. 7127 * XXX For now, only the requestor ever gets anything. 7128 * Moreover, if the requestor has any space at all, they receive 7129 * the entire chain, otherwise the request is refused with ENOBUFS. 7130 */ 7131 if (sbspace(&so->so_rcv) <= 0) { 7132 return key_senderror(so, m0, ENOBUFS); 7133 } 7134 7135 s = splsoftnet(); 7136 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7137 splx(s); 7138 7139 if (n == NULL) { 7140 return key_senderror(so, m0, ENOENT); 7141 } 7142 { 7143 uint64_t *ps = PFKEY_STAT_GETREF(); 7144 ps[PFKEY_STAT_IN_TOTAL]++; 7145 ps[PFKEY_STAT_IN_BYTES] += len; 7146 PFKEY_STAT_PUTREF(); 7147 } 7148 7149 /* 7150 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7151 * The requestor receives either the entire chain, or an 7152 * error message with ENOBUFS. 7153 * 7154 * sbappendaddrchain() takes the chain of entries, one 7155 * packet-record per SPD entry, prepends the key_src sockaddr 7156 * to each packet-record, links the sockaddr mbufs into a new 7157 * list of records, then appends the entire resulting 7158 * list to the requesting socket. 7159 */ 7160 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 7161 n, SB_PRIO_ONESHOT_OVERFLOW); 7162 7163 if (!ok) { 7164 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7165 m_freem(n); 7166 return key_senderror(so, m0, ENOBUFS); 7167 } 7168 7169 m_freem(m0); 7170 return 0; 7171 } 7172 7173 /* 7174 * SADB_X_PROMISC processing 7175 * 7176 * m will always be freed. 7177 */ 7178 static int 7179 key_promisc(struct socket *so, struct mbuf *m, 7180 const struct sadb_msghdr *mhp) 7181 { 7182 int olen; 7183 7184 /* sanity check */ 7185 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 7186 panic("key_promisc: NULL pointer is passed"); 7187 7188 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7189 7190 if (olen < sizeof(struct sadb_msg)) { 7191 #if 1 7192 return key_senderror(so, m, EINVAL); 7193 #else 7194 m_freem(m); 7195 return 0; 7196 #endif 7197 } else if (olen == sizeof(struct sadb_msg)) { 7198 /* enable/disable promisc mode */ 7199 struct keycb *kp; 7200 7201 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7202 return key_senderror(so, m, EINVAL); 7203 mhp->msg->sadb_msg_errno = 0; 7204 switch (mhp->msg->sadb_msg_satype) { 7205 case 0: 7206 case 1: 7207 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7208 break; 7209 default: 7210 return key_senderror(so, m, EINVAL); 7211 } 7212 7213 /* send the original message back to everyone */ 7214 mhp->msg->sadb_msg_errno = 0; 7215 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7216 } else { 7217 /* send packet as is */ 7218 7219 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7220 7221 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7222 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7223 } 7224 } 7225 7226 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7227 const struct sadb_msghdr *) = { 7228 NULL, /* SADB_RESERVED */ 7229 key_getspi, /* SADB_GETSPI */ 7230 key_update, /* SADB_UPDATE */ 7231 key_add, /* SADB_ADD */ 7232 key_delete, /* SADB_DELETE */ 7233 key_get, /* SADB_GET */ 7234 key_acquire2, /* SADB_ACQUIRE */ 7235 key_register, /* SADB_REGISTER */ 7236 NULL, /* SADB_EXPIRE */ 7237 key_flush, /* SADB_FLUSH */ 7238 key_dump, /* SADB_DUMP */ 7239 key_promisc, /* SADB_X_PROMISC */ 7240 NULL, /* SADB_X_PCHANGE */ 7241 key_spdadd, /* SADB_X_SPDUPDATE */ 7242 key_spdadd, /* SADB_X_SPDADD */ 7243 key_spddelete, /* SADB_X_SPDDELETE */ 7244 key_spdget, /* SADB_X_SPDGET */ 7245 NULL, /* SADB_X_SPDACQUIRE */ 7246 key_spddump, /* SADB_X_SPDDUMP */ 7247 key_spdflush, /* SADB_X_SPDFLUSH */ 7248 key_spdadd, /* SADB_X_SPDSETIDX */ 7249 NULL, /* SADB_X_SPDEXPIRE */ 7250 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7251 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7252 }; 7253 7254 /* 7255 * parse sadb_msg buffer to process PFKEYv2, 7256 * and create a data to response if needed. 7257 * I think to be dealed with mbuf directly. 7258 * IN: 7259 * msgp : pointer to pointer to a received buffer pulluped. 7260 * This is rewrited to response. 7261 * so : pointer to socket. 7262 * OUT: 7263 * length for buffer to send to user process. 7264 */ 7265 int 7266 key_parse(struct mbuf *m, struct socket *so) 7267 { 7268 struct sadb_msg *msg; 7269 struct sadb_msghdr mh; 7270 int error; 7271 int target; 7272 7273 /* sanity check */ 7274 if (m == NULL || so == NULL) 7275 panic("key_parse: NULL pointer is passed"); 7276 7277 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7278 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7279 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 7280 kdebug_sadb(msg)); 7281 #endif 7282 7283 if (m->m_len < sizeof(struct sadb_msg)) { 7284 m = m_pullup(m, sizeof(struct sadb_msg)); 7285 if (!m) 7286 return ENOBUFS; 7287 } 7288 msg = mtod(m, struct sadb_msg *); 7289 target = KEY_SENDUP_ONE; 7290 7291 if ((m->m_flags & M_PKTHDR) == 0 || 7292 m->m_pkthdr.len != m->m_pkthdr.len) { 7293 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 7294 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7295 error = EINVAL; 7296 goto senderror; 7297 } 7298 7299 if (msg->sadb_msg_version != PF_KEY_V2) { 7300 ipseclog((LOG_DEBUG, 7301 "key_parse: PF_KEY version %u is mismatched.\n", 7302 msg->sadb_msg_version)); 7303 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7304 error = EINVAL; 7305 goto senderror; 7306 } 7307 7308 if (msg->sadb_msg_type > SADB_MAX) { 7309 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7310 msg->sadb_msg_type)); 7311 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7312 error = EINVAL; 7313 goto senderror; 7314 } 7315 7316 /* for old-fashioned code - should be nuked */ 7317 if (m->m_pkthdr.len > MCLBYTES) { 7318 m_freem(m); 7319 return ENOBUFS; 7320 } 7321 if (m->m_next) { 7322 struct mbuf *n; 7323 7324 MGETHDR(n, M_DONTWAIT, MT_DATA); 7325 if (n && m->m_pkthdr.len > MHLEN) { 7326 MCLGET(n, M_DONTWAIT); 7327 if ((n->m_flags & M_EXT) == 0) { 7328 m_free(n); 7329 n = NULL; 7330 } 7331 } 7332 if (!n) { 7333 m_freem(m); 7334 return ENOBUFS; 7335 } 7336 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7337 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7338 n->m_next = NULL; 7339 m_freem(m); 7340 m = n; 7341 } 7342 7343 /* align the mbuf chain so that extensions are in contiguous region. */ 7344 error = key_align(m, &mh); 7345 if (error) 7346 return error; 7347 7348 if (m->m_next) { /*XXX*/ 7349 m_freem(m); 7350 return ENOBUFS; 7351 } 7352 7353 msg = mh.msg; 7354 7355 /* check SA type */ 7356 switch (msg->sadb_msg_satype) { 7357 case SADB_SATYPE_UNSPEC: 7358 switch (msg->sadb_msg_type) { 7359 case SADB_GETSPI: 7360 case SADB_UPDATE: 7361 case SADB_ADD: 7362 case SADB_DELETE: 7363 case SADB_GET: 7364 case SADB_ACQUIRE: 7365 case SADB_EXPIRE: 7366 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7367 "when msg type=%u.\n", msg->sadb_msg_type)); 7368 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7369 error = EINVAL; 7370 goto senderror; 7371 } 7372 break; 7373 case SADB_SATYPE_AH: 7374 case SADB_SATYPE_ESP: 7375 case SADB_X_SATYPE_IPCOMP: 7376 case SADB_X_SATYPE_TCPSIGNATURE: 7377 switch (msg->sadb_msg_type) { 7378 case SADB_X_SPDADD: 7379 case SADB_X_SPDDELETE: 7380 case SADB_X_SPDGET: 7381 case SADB_X_SPDDUMP: 7382 case SADB_X_SPDFLUSH: 7383 case SADB_X_SPDSETIDX: 7384 case SADB_X_SPDUPDATE: 7385 case SADB_X_SPDDELETE2: 7386 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7387 msg->sadb_msg_type)); 7388 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7389 error = EINVAL; 7390 goto senderror; 7391 } 7392 break; 7393 case SADB_SATYPE_RSVP: 7394 case SADB_SATYPE_OSPFV2: 7395 case SADB_SATYPE_RIPV2: 7396 case SADB_SATYPE_MIP: 7397 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7398 msg->sadb_msg_satype)); 7399 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7400 error = EOPNOTSUPP; 7401 goto senderror; 7402 case 1: /* XXX: What does it do? */ 7403 if (msg->sadb_msg_type == SADB_X_PROMISC) 7404 break; 7405 /*FALLTHROUGH*/ 7406 default: 7407 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7408 msg->sadb_msg_satype)); 7409 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7410 error = EINVAL; 7411 goto senderror; 7412 } 7413 7414 /* check field of upper layer protocol and address family */ 7415 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7416 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7417 struct sadb_address *src0, *dst0; 7418 u_int plen; 7419 7420 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7421 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7422 7423 /* check upper layer protocol */ 7424 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7425 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7426 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7427 error = EINVAL; 7428 goto senderror; 7429 } 7430 7431 /* check family */ 7432 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7433 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7434 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7435 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7436 error = EINVAL; 7437 goto senderror; 7438 } 7439 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7440 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7441 ipseclog((LOG_DEBUG, 7442 "key_parse: address struct size mismatched.\n")); 7443 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7444 error = EINVAL; 7445 goto senderror; 7446 } 7447 7448 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7449 case AF_INET: 7450 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7451 sizeof(struct sockaddr_in)) { 7452 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7453 error = EINVAL; 7454 goto senderror; 7455 } 7456 break; 7457 case AF_INET6: 7458 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7459 sizeof(struct sockaddr_in6)) { 7460 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7461 error = EINVAL; 7462 goto senderror; 7463 } 7464 break; 7465 default: 7466 ipseclog((LOG_DEBUG, 7467 "key_parse: unsupported address family.\n")); 7468 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7469 error = EAFNOSUPPORT; 7470 goto senderror; 7471 } 7472 7473 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7474 case AF_INET: 7475 plen = sizeof(struct in_addr) << 3; 7476 break; 7477 case AF_INET6: 7478 plen = sizeof(struct in6_addr) << 3; 7479 break; 7480 default: 7481 plen = 0; /*fool gcc*/ 7482 break; 7483 } 7484 7485 /* check max prefix length */ 7486 if (src0->sadb_address_prefixlen > plen || 7487 dst0->sadb_address_prefixlen > plen) { 7488 ipseclog((LOG_DEBUG, 7489 "key_parse: illegal prefixlen.\n")); 7490 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7491 error = EINVAL; 7492 goto senderror; 7493 } 7494 7495 /* 7496 * prefixlen == 0 is valid because there can be a case when 7497 * all addresses are matched. 7498 */ 7499 } 7500 7501 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7502 key_typesw[msg->sadb_msg_type] == NULL) { 7503 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7504 error = EINVAL; 7505 goto senderror; 7506 } 7507 7508 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7509 7510 senderror: 7511 msg->sadb_msg_errno = error; 7512 return key_sendup_mbuf(so, m, target); 7513 } 7514 7515 static int 7516 key_senderror(struct socket *so, struct mbuf *m, int code) 7517 { 7518 struct sadb_msg *msg; 7519 7520 if (m->m_len < sizeof(struct sadb_msg)) 7521 panic("invalid mbuf passed to key_senderror"); 7522 7523 msg = mtod(m, struct sadb_msg *); 7524 msg->sadb_msg_errno = code; 7525 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7526 } 7527 7528 /* 7529 * set the pointer to each header into message buffer. 7530 * m will be freed on error. 7531 * XXX larger-than-MCLBYTES extension? 7532 */ 7533 static int 7534 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7535 { 7536 struct mbuf *n; 7537 struct sadb_ext *ext; 7538 size_t off, end; 7539 int extlen; 7540 int toff; 7541 7542 /* sanity check */ 7543 if (m == NULL || mhp == NULL) 7544 panic("key_align: NULL pointer is passed"); 7545 if (m->m_len < sizeof(struct sadb_msg)) 7546 panic("invalid mbuf passed to key_align"); 7547 7548 /* initialize */ 7549 memset(mhp, 0, sizeof(*mhp)); 7550 7551 mhp->msg = mtod(m, struct sadb_msg *); 7552 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7553 7554 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7555 extlen = end; /*just in case extlen is not updated*/ 7556 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7557 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7558 if (!n) { 7559 /* m is already freed */ 7560 return ENOBUFS; 7561 } 7562 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7563 7564 /* set pointer */ 7565 switch (ext->sadb_ext_type) { 7566 case SADB_EXT_SA: 7567 case SADB_EXT_ADDRESS_SRC: 7568 case SADB_EXT_ADDRESS_DST: 7569 case SADB_EXT_ADDRESS_PROXY: 7570 case SADB_EXT_LIFETIME_CURRENT: 7571 case SADB_EXT_LIFETIME_HARD: 7572 case SADB_EXT_LIFETIME_SOFT: 7573 case SADB_EXT_KEY_AUTH: 7574 case SADB_EXT_KEY_ENCRYPT: 7575 case SADB_EXT_IDENTITY_SRC: 7576 case SADB_EXT_IDENTITY_DST: 7577 case SADB_EXT_SENSITIVITY: 7578 case SADB_EXT_PROPOSAL: 7579 case SADB_EXT_SUPPORTED_AUTH: 7580 case SADB_EXT_SUPPORTED_ENCRYPT: 7581 case SADB_EXT_SPIRANGE: 7582 case SADB_X_EXT_POLICY: 7583 case SADB_X_EXT_SA2: 7584 case SADB_X_EXT_NAT_T_TYPE: 7585 case SADB_X_EXT_NAT_T_SPORT: 7586 case SADB_X_EXT_NAT_T_DPORT: 7587 case SADB_X_EXT_NAT_T_OAI: 7588 case SADB_X_EXT_NAT_T_OAR: 7589 case SADB_X_EXT_NAT_T_FRAG: 7590 /* duplicate check */ 7591 /* 7592 * XXX Are there duplication payloads of either 7593 * KEY_AUTH or KEY_ENCRYPT ? 7594 */ 7595 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7596 ipseclog((LOG_DEBUG, 7597 "key_align: duplicate ext_type %u " 7598 "is passed.\n", ext->sadb_ext_type)); 7599 m_freem(m); 7600 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7601 return EINVAL; 7602 } 7603 break; 7604 default: 7605 ipseclog((LOG_DEBUG, 7606 "key_align: invalid ext_type %u is passed.\n", 7607 ext->sadb_ext_type)); 7608 m_freem(m); 7609 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7610 return EINVAL; 7611 } 7612 7613 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7614 7615 if (key_validate_ext(ext, extlen)) { 7616 m_freem(m); 7617 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7618 return EINVAL; 7619 } 7620 7621 n = m_pulldown(m, off, extlen, &toff); 7622 if (!n) { 7623 /* m is already freed */ 7624 return ENOBUFS; 7625 } 7626 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7627 7628 mhp->ext[ext->sadb_ext_type] = ext; 7629 mhp->extoff[ext->sadb_ext_type] = off; 7630 mhp->extlen[ext->sadb_ext_type] = extlen; 7631 } 7632 7633 if (off != end) { 7634 m_freem(m); 7635 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7636 return EINVAL; 7637 } 7638 7639 return 0; 7640 } 7641 7642 static int 7643 key_validate_ext(const struct sadb_ext *ext, int len) 7644 { 7645 const struct sockaddr *sa; 7646 enum { NONE, ADDR } checktype = NONE; 7647 int baselen = 0; 7648 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7649 7650 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7651 return EINVAL; 7652 7653 /* if it does not match minimum/maximum length, bail */ 7654 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7655 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7656 return EINVAL; 7657 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7658 return EINVAL; 7659 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7660 return EINVAL; 7661 7662 /* more checks based on sadb_ext_type XXX need more */ 7663 switch (ext->sadb_ext_type) { 7664 case SADB_EXT_ADDRESS_SRC: 7665 case SADB_EXT_ADDRESS_DST: 7666 case SADB_EXT_ADDRESS_PROXY: 7667 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7668 checktype = ADDR; 7669 break; 7670 case SADB_EXT_IDENTITY_SRC: 7671 case SADB_EXT_IDENTITY_DST: 7672 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7673 SADB_X_IDENTTYPE_ADDR) { 7674 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7675 checktype = ADDR; 7676 } else 7677 checktype = NONE; 7678 break; 7679 default: 7680 checktype = NONE; 7681 break; 7682 } 7683 7684 switch (checktype) { 7685 case NONE: 7686 break; 7687 case ADDR: 7688 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7689 if (len < baselen + sal) 7690 return EINVAL; 7691 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7692 return EINVAL; 7693 break; 7694 } 7695 7696 return 0; 7697 } 7698 7699 static int 7700 key_do_init(void) 7701 { 7702 int i; 7703 7704 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7705 7706 callout_init(&key_timehandler_ch, 0); 7707 7708 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7709 LIST_INIT(&sptree[i]); 7710 } 7711 7712 LIST_INIT(&sahtree); 7713 7714 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7715 LIST_INIT(®tree[i]); 7716 } 7717 7718 #ifndef IPSEC_NONBLOCK_ACQUIRE 7719 LIST_INIT(&acqtree); 7720 #endif 7721 LIST_INIT(&spacqtree); 7722 7723 /* system default */ 7724 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7725 ip4_def_policy.refcnt++; /*never reclaim this*/ 7726 7727 #ifdef INET6 7728 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7729 ip6_def_policy.refcnt++; /*never reclaim this*/ 7730 #endif 7731 7732 7733 #ifndef IPSEC_DEBUG2 7734 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7735 #endif /*IPSEC_DEBUG2*/ 7736 7737 /* initialize key statistics */ 7738 keystat.getspi_count = 1; 7739 7740 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7741 7742 return (0); 7743 } 7744 7745 void 7746 key_init(void) 7747 { 7748 static ONCE_DECL(key_init_once); 7749 7750 RUN_ONCE(&key_init_once, key_do_init); 7751 } 7752 7753 /* 7754 * XXX: maybe This function is called after INBOUND IPsec processing. 7755 * 7756 * Special check for tunnel-mode packets. 7757 * We must make some checks for consistency between inner and outer IP header. 7758 * 7759 * xxx more checks to be provided 7760 */ 7761 int 7762 key_checktunnelsanity( 7763 struct secasvar *sav, 7764 u_int family, 7765 void *src, 7766 void *dst 7767 ) 7768 { 7769 /* sanity check */ 7770 if (sav->sah == NULL) 7771 panic("sav->sah == NULL at key_checktunnelsanity"); 7772 7773 /* XXX: check inner IP header */ 7774 7775 return 1; 7776 } 7777 7778 #if 0 7779 #define hostnamelen strlen(hostname) 7780 7781 /* 7782 * Get FQDN for the host. 7783 * If the administrator configured hostname (by hostname(1)) without 7784 * domain name, returns nothing. 7785 */ 7786 static const char * 7787 key_getfqdn(void) 7788 { 7789 int i; 7790 int hasdot; 7791 static char fqdn[MAXHOSTNAMELEN + 1]; 7792 7793 if (!hostnamelen) 7794 return NULL; 7795 7796 /* check if it comes with domain name. */ 7797 hasdot = 0; 7798 for (i = 0; i < hostnamelen; i++) { 7799 if (hostname[i] == '.') 7800 hasdot++; 7801 } 7802 if (!hasdot) 7803 return NULL; 7804 7805 /* NOTE: hostname may not be NUL-terminated. */ 7806 memset(fqdn, 0, sizeof(fqdn)); 7807 memcpy(fqdn, hostname, hostnamelen); 7808 fqdn[hostnamelen] = '\0'; 7809 return fqdn; 7810 } 7811 7812 /* 7813 * get username@FQDN for the host/user. 7814 */ 7815 static const char * 7816 key_getuserfqdn(void) 7817 { 7818 const char *host; 7819 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7820 struct proc *p = curproc; 7821 char *q; 7822 7823 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7824 return NULL; 7825 if (!(host = key_getfqdn())) 7826 return NULL; 7827 7828 /* NOTE: s_login may not be-NUL terminated. */ 7829 memset(userfqdn, 0, sizeof(userfqdn)); 7830 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7831 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7832 q = userfqdn + strlen(userfqdn); 7833 *q++ = '@'; 7834 memcpy(q, host, strlen(host)); 7835 q += strlen(host); 7836 *q++ = '\0'; 7837 7838 return userfqdn; 7839 } 7840 #endif 7841 7842 /* record data transfer on SA, and update timestamps */ 7843 void 7844 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7845 { 7846 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7847 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7848 if (!sav->lft_c) 7849 return; 7850 7851 /* 7852 * XXX Currently, there is a difference of bytes size 7853 * between inbound and outbound processing. 7854 */ 7855 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7856 /* to check bytes lifetime is done in key_timehandler(). */ 7857 7858 /* 7859 * We use the number of packets as the unit of 7860 * sadb_lifetime_allocations. We increment the variable 7861 * whenever {esp,ah}_{in,out}put is called. 7862 */ 7863 sav->lft_c->sadb_lifetime_allocations++; 7864 /* XXX check for expires? */ 7865 7866 /* 7867 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7868 * in seconds. HARD and SOFT lifetime are measured by the time 7869 * difference (again in seconds) from sadb_lifetime_usetime. 7870 * 7871 * usetime 7872 * v expire expire 7873 * -----+-----+--------+---> t 7874 * <--------------> HARD 7875 * <-----> SOFT 7876 */ 7877 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7878 /* XXX check for expires? */ 7879 7880 return; 7881 } 7882 7883 /* dumb version */ 7884 void 7885 key_sa_routechange(struct sockaddr *dst) 7886 { 7887 struct secashead *sah; 7888 struct route *ro; 7889 const struct sockaddr *sa; 7890 7891 LIST_FOREACH(sah, &sahtree, chain) { 7892 ro = &sah->sa_route; 7893 sa = rtcache_getdst(ro); 7894 if (sa != NULL && dst->sa_len == sa->sa_len && 7895 memcmp(dst, sa, dst->sa_len) == 0) 7896 rtcache_free(ro); 7897 } 7898 7899 return; 7900 } 7901 7902 static void 7903 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7904 { 7905 if (sav == NULL) 7906 panic("key_sa_chgstate called with sav == NULL"); 7907 7908 if (sav->state == state) 7909 return; 7910 7911 if (__LIST_CHAINED(sav)) 7912 LIST_REMOVE(sav, chain); 7913 7914 sav->state = state; 7915 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7916 } 7917 7918 /* XXX too much? */ 7919 static struct mbuf * 7920 key_alloc_mbuf(int l) 7921 { 7922 struct mbuf *m = NULL, *n; 7923 int len, t; 7924 7925 len = l; 7926 while (len > 0) { 7927 MGET(n, M_DONTWAIT, MT_DATA); 7928 if (n && len > MLEN) 7929 MCLGET(n, M_DONTWAIT); 7930 if (!n) { 7931 m_freem(m); 7932 return NULL; 7933 } 7934 7935 n->m_next = NULL; 7936 n->m_len = 0; 7937 n->m_len = M_TRAILINGSPACE(n); 7938 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7939 if (n->m_len > len) { 7940 t = (n->m_len - len) & ~(sizeof(long) - 1); 7941 n->m_data += t; 7942 n->m_len = len; 7943 } 7944 7945 len -= n->m_len; 7946 7947 if (m) 7948 m_cat(m, n); 7949 else 7950 m = n; 7951 } 7952 7953 return m; 7954 } 7955 7956 static struct mbuf * 7957 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7958 { 7959 struct secashead *sah; 7960 struct secasvar *sav; 7961 u_int16_t proto; 7962 u_int stateidx; 7963 u_int8_t satype; 7964 u_int8_t state; 7965 int cnt; 7966 struct mbuf *m, *n; 7967 7968 /* map satype to proto */ 7969 if ((proto = key_satype2proto(req_satype)) == 0) { 7970 *errorp = EINVAL; 7971 return (NULL); 7972 } 7973 7974 /* count sav entries to be sent to the userland. */ 7975 cnt = 0; 7976 LIST_FOREACH(sah, &sahtree, chain) { 7977 if (req_satype != SADB_SATYPE_UNSPEC && 7978 proto != sah->saidx.proto) 7979 continue; 7980 7981 for (stateidx = 0; 7982 stateidx < _ARRAYLEN(saorder_state_any); 7983 stateidx++) { 7984 state = saorder_state_any[stateidx]; 7985 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7986 cnt++; 7987 } 7988 } 7989 } 7990 7991 if (cnt == 0) { 7992 *errorp = ENOENT; 7993 return (NULL); 7994 } 7995 7996 /* send this to the userland, one at a time. */ 7997 m = NULL; 7998 LIST_FOREACH(sah, &sahtree, chain) { 7999 if (req_satype != SADB_SATYPE_UNSPEC && 8000 proto != sah->saidx.proto) 8001 continue; 8002 8003 /* map proto to satype */ 8004 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 8005 m_freem(m); 8006 *errorp = EINVAL; 8007 return (NULL); 8008 } 8009 8010 for (stateidx = 0; 8011 stateidx < _ARRAYLEN(saorder_state_any); 8012 stateidx++) { 8013 state = saorder_state_any[stateidx]; 8014 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8015 n = key_setdumpsa(sav, SADB_DUMP, satype, 8016 --cnt, pid); 8017 if (!n) { 8018 m_freem(m); 8019 *errorp = ENOBUFS; 8020 return (NULL); 8021 } 8022 8023 if (!m) 8024 m = n; 8025 else 8026 m_cat(m, n); 8027 } 8028 } 8029 } 8030 8031 if (!m) { 8032 *errorp = EINVAL; 8033 return (NULL); 8034 } 8035 8036 if ((m->m_flags & M_PKTHDR) != 0) { 8037 m->m_pkthdr.len = 0; 8038 for (n = m; n; n = n->m_next) 8039 m->m_pkthdr.len += n->m_len; 8040 } 8041 8042 *errorp = 0; 8043 return (m); 8044 } 8045 8046 static struct mbuf * 8047 key_setspddump(int *errorp, pid_t pid) 8048 { 8049 struct secpolicy *sp; 8050 int cnt; 8051 u_int dir; 8052 struct mbuf *m, *n; 8053 8054 /* search SPD entry and get buffer size. */ 8055 cnt = 0; 8056 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8057 LIST_FOREACH(sp, &sptree[dir], chain) { 8058 cnt++; 8059 } 8060 } 8061 8062 if (cnt == 0) { 8063 *errorp = ENOENT; 8064 return (NULL); 8065 } 8066 8067 m = NULL; 8068 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8069 LIST_FOREACH(sp, &sptree[dir], chain) { 8070 --cnt; 8071 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8072 8073 if (!n) { 8074 *errorp = ENOBUFS; 8075 m_freem(m); 8076 return (NULL); 8077 } 8078 if (!m) 8079 m = n; 8080 else { 8081 m->m_pkthdr.len += n->m_pkthdr.len; 8082 m_cat(m, n); 8083 } 8084 } 8085 } 8086 8087 *errorp = 0; 8088 return (m); 8089 } 8090 8091 int 8092 key_get_used(void) { 8093 return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || 8094 !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); 8095 } 8096 8097 void 8098 key_update_used(void) 8099 { 8100 switch (ipsec_enabled) { 8101 default: 8102 case 0: 8103 #ifdef notyet 8104 /* XXX: racy */ 8105 ipsec_used = 0; 8106 #endif 8107 break; 8108 case 1: 8109 #ifndef notyet 8110 /* XXX: racy */ 8111 if (!ipsec_used) 8112 #endif 8113 ipsec_used = key_get_used(); 8114 break; 8115 case 2: 8116 ipsec_used = 1; 8117 break; 8118 } 8119 } 8120 8121 static int 8122 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8123 { 8124 struct mbuf *m, *n; 8125 int err2 = 0; 8126 char *p, *ep; 8127 size_t len; 8128 int s, error; 8129 8130 if (newp) 8131 return (EPERM); 8132 if (namelen != 1) 8133 return (EINVAL); 8134 8135 s = splsoftnet(); 8136 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8137 splx(s); 8138 if (!m) 8139 return (error); 8140 if (!oldp) 8141 *oldlenp = m->m_pkthdr.len; 8142 else { 8143 p = oldp; 8144 if (*oldlenp < m->m_pkthdr.len) { 8145 err2 = ENOMEM; 8146 ep = p + *oldlenp; 8147 } else { 8148 *oldlenp = m->m_pkthdr.len; 8149 ep = p + m->m_pkthdr.len; 8150 } 8151 for (n = m; n; n = n->m_next) { 8152 len = (ep - p < n->m_len) ? 8153 ep - p : n->m_len; 8154 error = copyout(mtod(n, const void *), p, len); 8155 p += len; 8156 if (error) 8157 break; 8158 } 8159 if (error == 0) 8160 error = err2; 8161 } 8162 m_freem(m); 8163 8164 return (error); 8165 } 8166 8167 static int 8168 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8169 { 8170 struct mbuf *m, *n; 8171 int err2 = 0; 8172 char *p, *ep; 8173 size_t len; 8174 int s, error; 8175 8176 if (newp) 8177 return (EPERM); 8178 if (namelen != 0) 8179 return (EINVAL); 8180 8181 s = splsoftnet(); 8182 m = key_setspddump(&error, l->l_proc->p_pid); 8183 splx(s); 8184 if (!m) 8185 return (error); 8186 if (!oldp) 8187 *oldlenp = m->m_pkthdr.len; 8188 else { 8189 p = oldp; 8190 if (*oldlenp < m->m_pkthdr.len) { 8191 err2 = ENOMEM; 8192 ep = p + *oldlenp; 8193 } else { 8194 *oldlenp = m->m_pkthdr.len; 8195 ep = p + m->m_pkthdr.len; 8196 } 8197 for (n = m; n; n = n->m_next) { 8198 len = (ep - p < n->m_len) ? 8199 ep - p : n->m_len; 8200 error = copyout(mtod(n, const void *), p, len); 8201 p += len; 8202 if (error) 8203 break; 8204 } 8205 if (error == 0) 8206 error = err2; 8207 } 8208 m_freem(m); 8209 8210 return (error); 8211 } 8212 8213 /* 8214 * Create sysctl tree for native IPSEC key knobs, originally 8215 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8216 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8217 * and in any case the part of our sysctl namespace used for dumping the 8218 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8219 * namespace, for API reasons. 8220 * 8221 * Pending a consensus on the right way to fix this, add a level of 8222 * indirection in how we number the `native' IPSEC key nodes; 8223 * and (as requested by Andrew Brown) move registration of the 8224 * KAME-compatible names to a separate function. 8225 */ 8226 #if 0 8227 # define IPSEC_PFKEY PF_KEY_V2 8228 # define IPSEC_PFKEY_NAME "keyv2" 8229 #else 8230 # define IPSEC_PFKEY PF_KEY 8231 # define IPSEC_PFKEY_NAME "key" 8232 #endif 8233 8234 static int 8235 sysctl_net_key_stats(SYSCTLFN_ARGS) 8236 { 8237 8238 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8239 } 8240 8241 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 8242 { 8243 8244 sysctl_createv(clog, 0, NULL, NULL, 8245 CTLFLAG_PERMANENT, 8246 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8247 NULL, 0, NULL, 0, 8248 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8249 8250 sysctl_createv(clog, 0, NULL, NULL, 8251 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8252 CTLTYPE_INT, "debug", NULL, 8253 NULL, 0, &key_debug_level, 0, 8254 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8255 sysctl_createv(clog, 0, NULL, NULL, 8256 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8257 CTLTYPE_INT, "spi_try", NULL, 8258 NULL, 0, &key_spi_trycnt, 0, 8259 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8260 sysctl_createv(clog, 0, NULL, NULL, 8261 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8262 CTLTYPE_INT, "spi_min_value", NULL, 8263 NULL, 0, &key_spi_minval, 0, 8264 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8265 sysctl_createv(clog, 0, NULL, NULL, 8266 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8267 CTLTYPE_INT, "spi_max_value", NULL, 8268 NULL, 0, &key_spi_maxval, 0, 8269 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8270 sysctl_createv(clog, 0, NULL, NULL, 8271 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8272 CTLTYPE_INT, "random_int", NULL, 8273 NULL, 0, &key_int_random, 0, 8274 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8275 sysctl_createv(clog, 0, NULL, NULL, 8276 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8277 CTLTYPE_INT, "larval_lifetime", NULL, 8278 NULL, 0, &key_larval_lifetime, 0, 8279 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8280 sysctl_createv(clog, 0, NULL, NULL, 8281 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8282 CTLTYPE_INT, "blockacq_count", NULL, 8283 NULL, 0, &key_blockacq_count, 0, 8284 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8285 sysctl_createv(clog, 0, NULL, NULL, 8286 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8287 CTLTYPE_INT, "blockacq_lifetime", NULL, 8288 NULL, 0, &key_blockacq_lifetime, 0, 8289 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8290 sysctl_createv(clog, 0, NULL, NULL, 8291 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8292 CTLTYPE_INT, "esp_keymin", NULL, 8293 NULL, 0, &ipsec_esp_keymin, 0, 8294 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8295 sysctl_createv(clog, 0, NULL, NULL, 8296 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8297 CTLTYPE_INT, "prefered_oldsa", NULL, 8298 NULL, 0, &key_prefered_oldsa, 0, 8299 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8300 sysctl_createv(clog, 0, NULL, NULL, 8301 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8302 CTLTYPE_INT, "esp_auth", NULL, 8303 NULL, 0, &ipsec_esp_auth, 0, 8304 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8305 sysctl_createv(clog, 0, NULL, NULL, 8306 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8307 CTLTYPE_INT, "ah_keymin", NULL, 8308 NULL, 0, &ipsec_ah_keymin, 0, 8309 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8310 sysctl_createv(clog, 0, NULL, NULL, 8311 CTLFLAG_PERMANENT, 8312 CTLTYPE_STRUCT, "stats", 8313 SYSCTL_DESCR("PF_KEY statistics"), 8314 sysctl_net_key_stats, 0, NULL, 0, 8315 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8316 } 8317 8318 /* 8319 * Register sysctl names used by setkey(8). For historical reasons, 8320 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8321 * for both IPSEC and KAME IPSEC. 8322 */ 8323 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for IPSEC") 8324 { 8325 8326 sysctl_createv(clog, 0, NULL, NULL, 8327 CTLFLAG_PERMANENT, 8328 CTLTYPE_NODE, "key", NULL, 8329 NULL, 0, NULL, 0, 8330 CTL_NET, PF_KEY, CTL_EOL); 8331 8332 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8333 sysctl_createv(clog, 0, NULL, NULL, 8334 CTLFLAG_PERMANENT, 8335 CTLTYPE_STRUCT, "dumpsa", NULL, 8336 sysctl_net_key_dumpsa, 0, NULL, 0, 8337 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8338 sysctl_createv(clog, 0, NULL, NULL, 8339 CTLFLAG_PERMANENT, 8340 CTLTYPE_STRUCT, "dumpsp", NULL, 8341 sysctl_net_key_dumpsp, 0, NULL, 0, 8342 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8343 } 8344