key.c revision 1.89
1 /* $NetBSD: key.c,v 1.89 2014/06/05 17:11:54 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 1.89 2014/06/05 17:11:54 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 struct inpcbpolicy *sp = pcb->inp_sp; 1224 1225 /* Does it have a PCB ? */ 1226 if (pcb == NULL) 1227 return; 1228 key_freesp_so(&sp->sp_in); 1229 key_freesp_so(&sp->sp_out); 1230 } 1231 break; 1232 #endif 1233 #ifdef INET6 1234 case PF_INET6: 1235 { 1236 #ifdef HAVE_NRL_INPCB 1237 struct inpcb *pcb = sotoinpcb(so); 1238 struct inpcbpolicy *sp = pcb->inp_sp; 1239 1240 /* Does it have a PCB ? */ 1241 if (pcb == NULL) 1242 return; 1243 key_freesp_so(&sp->sp_in); 1244 key_freesp_so(&sp->sp_out); 1245 #else 1246 struct in6pcb *pcb = sotoin6pcb(so); 1247 1248 /* Does it have a PCB ? */ 1249 if (pcb == NULL) 1250 return; 1251 key_freesp_so(&pcb->in6p_sp->sp_in); 1252 key_freesp_so(&pcb->in6p_sp->sp_out); 1253 #endif 1254 } 1255 break; 1256 #endif /* INET6 */ 1257 default: 1258 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1259 so->so_proto->pr_domain->dom_family)); 1260 return; 1261 } 1262 } 1263 1264 static void 1265 key_freesp_so(struct secpolicy **sp) 1266 { 1267 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp")); 1268 1269 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1270 (*sp)->policy == IPSEC_POLICY_BYPASS) 1271 return; 1272 1273 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1274 ("key_freesp_so: invalid policy %u", (*sp)->policy)); 1275 KEY_FREESP(sp); 1276 } 1277 1278 /* 1279 * Must be called after calling key_allocsa(). 1280 * This function is called by key_freesp() to free some SA allocated 1281 * for a policy. 1282 */ 1283 void 1284 key_freesav(struct secasvar **psav, const char* where, int tag) 1285 { 1286 struct secasvar *sav = *psav; 1287 1288 IPSEC_ASSERT(sav != NULL, ("key_freesav: null sav")); 1289 1290 SA_DELREF(sav); 1291 1292 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1293 printf("DP %s SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1294 __func__, sav, (u_long)ntohl(sav->spi), where, tag, 1295 sav->refcnt)); 1296 1297 if (sav->refcnt == 0) { 1298 *psav = NULL; 1299 key_delsav(sav); 1300 } 1301 } 1302 1303 /* %%% SPD management */ 1304 /* 1305 * free security policy entry. 1306 */ 1307 static void 1308 key_delsp(struct secpolicy *sp) 1309 { 1310 int s; 1311 1312 IPSEC_ASSERT(sp != NULL, ("key_delsp: null sp")); 1313 1314 key_sp_dead(sp); 1315 1316 IPSEC_ASSERT(sp->refcnt == 0, 1317 ("key_delsp: SP with references deleted (refcnt %u)", 1318 sp->refcnt)); 1319 1320 s = splsoftnet(); /*called from softclock()*/ 1321 1322 { 1323 struct ipsecrequest *isr = sp->req, *nextisr; 1324 1325 while (isr != NULL) { 1326 if (isr->sav != NULL) { 1327 KEY_FREESAV(&isr->sav); 1328 isr->sav = NULL; 1329 } 1330 1331 nextisr = isr->next; 1332 KFREE(isr); 1333 isr = nextisr; 1334 } 1335 } 1336 1337 KFREE(sp); 1338 1339 splx(s); 1340 } 1341 1342 /* 1343 * search SPD 1344 * OUT: NULL : not found 1345 * others : found, pointer to a SP. 1346 */ 1347 static struct secpolicy * 1348 key_getsp(const struct secpolicyindex *spidx) 1349 { 1350 struct secpolicy *sp; 1351 1352 IPSEC_ASSERT(spidx != NULL, ("key_getsp: null spidx")); 1353 1354 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1355 if (sp->state == IPSEC_SPSTATE_DEAD) 1356 continue; 1357 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1358 SP_ADDREF(sp); 1359 return sp; 1360 } 1361 } 1362 1363 return NULL; 1364 } 1365 1366 /* 1367 * get SP by index. 1368 * OUT: NULL : not found 1369 * others : found, pointer to a SP. 1370 */ 1371 static struct secpolicy * 1372 key_getspbyid(u_int32_t id) 1373 { 1374 struct secpolicy *sp; 1375 1376 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1377 if (sp->state == IPSEC_SPSTATE_DEAD) 1378 continue; 1379 if (sp->id == id) { 1380 SP_ADDREF(sp); 1381 return sp; 1382 } 1383 } 1384 1385 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1386 if (sp->state == IPSEC_SPSTATE_DEAD) 1387 continue; 1388 if (sp->id == id) { 1389 SP_ADDREF(sp); 1390 return sp; 1391 } 1392 } 1393 1394 return NULL; 1395 } 1396 1397 struct secpolicy * 1398 key_newsp(const char* where, int tag) 1399 { 1400 struct secpolicy *newsp = NULL; 1401 1402 newsp = (struct secpolicy *) 1403 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); 1404 if (newsp) { 1405 newsp->refcnt = 1; 1406 newsp->req = NULL; 1407 } 1408 1409 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1410 printf("DP %s from %s:%u return SP:%p\n", __func__, 1411 where, tag, newsp)); 1412 return newsp; 1413 } 1414 1415 /* 1416 * create secpolicy structure from sadb_x_policy structure. 1417 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1418 * so must be set properly later. 1419 */ 1420 struct secpolicy * 1421 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1422 { 1423 struct secpolicy *newsp; 1424 1425 /* sanity check */ 1426 if (xpl0 == NULL) 1427 panic("key_msg2sp: NULL pointer was passed"); 1428 if (len < sizeof(*xpl0)) 1429 panic("key_msg2sp: invalid length"); 1430 if (len != PFKEY_EXTLEN(xpl0)) { 1431 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1432 *error = EINVAL; 1433 return NULL; 1434 } 1435 1436 if ((newsp = KEY_NEWSP()) == NULL) { 1437 *error = ENOBUFS; 1438 return NULL; 1439 } 1440 1441 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1442 newsp->policy = xpl0->sadb_x_policy_type; 1443 1444 /* check policy */ 1445 switch (xpl0->sadb_x_policy_type) { 1446 case IPSEC_POLICY_DISCARD: 1447 case IPSEC_POLICY_NONE: 1448 case IPSEC_POLICY_ENTRUST: 1449 case IPSEC_POLICY_BYPASS: 1450 newsp->req = NULL; 1451 break; 1452 1453 case IPSEC_POLICY_IPSEC: 1454 { 1455 int tlen; 1456 const struct sadb_x_ipsecrequest *xisr; 1457 uint16_t xisr_reqid; 1458 struct ipsecrequest **p_isr = &newsp->req; 1459 1460 /* validity check */ 1461 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1462 ipseclog((LOG_DEBUG, 1463 "key_msg2sp: Invalid msg length.\n")); 1464 KEY_FREESP(&newsp); 1465 *error = EINVAL; 1466 return NULL; 1467 } 1468 1469 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1470 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1471 1472 while (tlen > 0) { 1473 /* length check */ 1474 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1475 ipseclog((LOG_DEBUG, "key_msg2sp: " 1476 "invalid ipsecrequest length.\n")); 1477 KEY_FREESP(&newsp); 1478 *error = EINVAL; 1479 return NULL; 1480 } 1481 1482 /* allocate request buffer */ 1483 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); 1484 if ((*p_isr) == NULL) { 1485 ipseclog((LOG_DEBUG, 1486 "key_msg2sp: No more memory.\n")); 1487 KEY_FREESP(&newsp); 1488 *error = ENOBUFS; 1489 return NULL; 1490 } 1491 memset(*p_isr, 0, sizeof(**p_isr)); 1492 1493 /* set values */ 1494 (*p_isr)->next = NULL; 1495 1496 switch (xisr->sadb_x_ipsecrequest_proto) { 1497 case IPPROTO_ESP: 1498 case IPPROTO_AH: 1499 case IPPROTO_IPCOMP: 1500 break; 1501 default: 1502 ipseclog((LOG_DEBUG, 1503 "key_msg2sp: invalid proto type=%u\n", 1504 xisr->sadb_x_ipsecrequest_proto)); 1505 KEY_FREESP(&newsp); 1506 *error = EPROTONOSUPPORT; 1507 return NULL; 1508 } 1509 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1510 1511 switch (xisr->sadb_x_ipsecrequest_mode) { 1512 case IPSEC_MODE_TRANSPORT: 1513 case IPSEC_MODE_TUNNEL: 1514 break; 1515 case IPSEC_MODE_ANY: 1516 default: 1517 ipseclog((LOG_DEBUG, 1518 "key_msg2sp: invalid mode=%u\n", 1519 xisr->sadb_x_ipsecrequest_mode)); 1520 KEY_FREESP(&newsp); 1521 *error = EINVAL; 1522 return NULL; 1523 } 1524 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1525 1526 switch (xisr->sadb_x_ipsecrequest_level) { 1527 case IPSEC_LEVEL_DEFAULT: 1528 case IPSEC_LEVEL_USE: 1529 case IPSEC_LEVEL_REQUIRE: 1530 break; 1531 case IPSEC_LEVEL_UNIQUE: 1532 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1533 /* validity check */ 1534 /* 1535 * If range violation of reqid, kernel will 1536 * update it, don't refuse it. 1537 */ 1538 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1539 ipseclog((LOG_DEBUG, 1540 "key_msg2sp: reqid=%d range " 1541 "violation, updated by kernel.\n", 1542 xisr_reqid)); 1543 xisr_reqid = 0; 1544 } 1545 1546 /* allocate new reqid id if reqid is zero. */ 1547 if (xisr_reqid == 0) { 1548 u_int16_t reqid; 1549 if ((reqid = key_newreqid()) == 0) { 1550 KEY_FREESP(&newsp); 1551 *error = ENOBUFS; 1552 return NULL; 1553 } 1554 (*p_isr)->saidx.reqid = reqid; 1555 } else { 1556 /* set it for manual keying. */ 1557 (*p_isr)->saidx.reqid = xisr_reqid; 1558 } 1559 break; 1560 1561 default: 1562 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1563 xisr->sadb_x_ipsecrequest_level)); 1564 KEY_FREESP(&newsp); 1565 *error = EINVAL; 1566 return NULL; 1567 } 1568 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1569 1570 /* set IP addresses if there */ 1571 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1572 const struct sockaddr *paddr; 1573 1574 paddr = (const struct sockaddr *)(xisr + 1); 1575 1576 /* validity check */ 1577 if (paddr->sa_len 1578 > sizeof((*p_isr)->saidx.src)) { 1579 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1580 "address length.\n")); 1581 KEY_FREESP(&newsp); 1582 *error = EINVAL; 1583 return NULL; 1584 } 1585 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1586 1587 paddr = (const struct sockaddr *)((const char *)paddr 1588 + paddr->sa_len); 1589 1590 /* validity check */ 1591 if (paddr->sa_len 1592 > sizeof((*p_isr)->saidx.dst)) { 1593 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1594 "address length.\n")); 1595 KEY_FREESP(&newsp); 1596 *error = EINVAL; 1597 return NULL; 1598 } 1599 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1600 } 1601 1602 (*p_isr)->sav = NULL; 1603 (*p_isr)->sp = newsp; 1604 1605 /* initialization for the next. */ 1606 p_isr = &(*p_isr)->next; 1607 tlen -= xisr->sadb_x_ipsecrequest_len; 1608 1609 /* validity check */ 1610 if (tlen < 0) { 1611 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1612 KEY_FREESP(&newsp); 1613 *error = EINVAL; 1614 return NULL; 1615 } 1616 1617 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr 1618 + xisr->sadb_x_ipsecrequest_len); 1619 } 1620 } 1621 break; 1622 default: 1623 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1624 KEY_FREESP(&newsp); 1625 *error = EINVAL; 1626 return NULL; 1627 } 1628 1629 *error = 0; 1630 return newsp; 1631 } 1632 1633 static u_int16_t 1634 key_newreqid(void) 1635 { 1636 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1637 1638 auto_reqid = (auto_reqid == 0xffff 1639 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1640 1641 /* XXX should be unique check */ 1642 1643 return auto_reqid; 1644 } 1645 1646 /* 1647 * copy secpolicy struct to sadb_x_policy structure indicated. 1648 */ 1649 struct mbuf * 1650 key_sp2msg(const struct secpolicy *sp) 1651 { 1652 struct sadb_x_policy *xpl; 1653 int tlen; 1654 char *p; 1655 struct mbuf *m; 1656 1657 /* sanity check. */ 1658 if (sp == NULL) 1659 panic("key_sp2msg: NULL pointer was passed"); 1660 1661 tlen = key_getspreqmsglen(sp); 1662 1663 m = key_alloc_mbuf(tlen); 1664 if (!m || m->m_next) { /*XXX*/ 1665 if (m) 1666 m_freem(m); 1667 return NULL; 1668 } 1669 1670 m->m_len = tlen; 1671 m->m_next = NULL; 1672 xpl = mtod(m, struct sadb_x_policy *); 1673 memset(xpl, 0, tlen); 1674 1675 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1676 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1677 xpl->sadb_x_policy_type = sp->policy; 1678 xpl->sadb_x_policy_dir = sp->spidx.dir; 1679 xpl->sadb_x_policy_id = sp->id; 1680 p = (char *)xpl + sizeof(*xpl); 1681 1682 /* if is the policy for ipsec ? */ 1683 if (sp->policy == IPSEC_POLICY_IPSEC) { 1684 struct sadb_x_ipsecrequest *xisr; 1685 struct ipsecrequest *isr; 1686 1687 for (isr = sp->req; isr != NULL; isr = isr->next) { 1688 1689 xisr = (struct sadb_x_ipsecrequest *)p; 1690 1691 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1692 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1693 xisr->sadb_x_ipsecrequest_level = isr->level; 1694 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1695 1696 p += sizeof(*xisr); 1697 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1698 p += isr->saidx.src.sa.sa_len; 1699 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1700 p += isr->saidx.src.sa.sa_len; 1701 1702 xisr->sadb_x_ipsecrequest_len = 1703 PFKEY_ALIGN8(sizeof(*xisr) 1704 + isr->saidx.src.sa.sa_len 1705 + isr->saidx.dst.sa.sa_len); 1706 } 1707 } 1708 1709 return m; 1710 } 1711 1712 /* m will not be freed nor modified */ 1713 static struct mbuf * 1714 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1715 int ndeep, int nitem, ...) 1716 { 1717 va_list ap; 1718 int idx; 1719 int i; 1720 struct mbuf *result = NULL, *n; 1721 int len; 1722 1723 if (m == NULL || mhp == NULL) 1724 panic("null pointer passed to key_gather"); 1725 1726 va_start(ap, nitem); 1727 for (i = 0; i < nitem; i++) { 1728 idx = va_arg(ap, int); 1729 if (idx < 0 || idx > SADB_EXT_MAX) 1730 goto fail; 1731 /* don't attempt to pull empty extension */ 1732 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1733 continue; 1734 if (idx != SADB_EXT_RESERVED && 1735 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1736 continue; 1737 1738 if (idx == SADB_EXT_RESERVED) { 1739 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1740 #ifdef DIAGNOSTIC 1741 if (len > MHLEN) 1742 panic("assumption failed"); 1743 #endif 1744 MGETHDR(n, M_DONTWAIT, MT_DATA); 1745 if (!n) 1746 goto fail; 1747 n->m_len = len; 1748 n->m_next = NULL; 1749 m_copydata(m, 0, sizeof(struct sadb_msg), 1750 mtod(n, void *)); 1751 } else if (i < ndeep) { 1752 len = mhp->extlen[idx]; 1753 n = key_alloc_mbuf(len); 1754 if (!n || n->m_next) { /*XXX*/ 1755 if (n) 1756 m_freem(n); 1757 goto fail; 1758 } 1759 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1760 mtod(n, void *)); 1761 } else { 1762 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1763 M_DONTWAIT); 1764 } 1765 if (n == NULL) 1766 goto fail; 1767 1768 if (result) 1769 m_cat(result, n); 1770 else 1771 result = n; 1772 } 1773 va_end(ap); 1774 1775 if (result && (result->m_flags & M_PKTHDR) != 0) { 1776 result->m_pkthdr.len = 0; 1777 for (n = result; n; n = n->m_next) 1778 result->m_pkthdr.len += n->m_len; 1779 } 1780 1781 return result; 1782 1783 fail: 1784 va_end(ap); 1785 m_freem(result); 1786 return NULL; 1787 } 1788 1789 /* 1790 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1791 * add an entry to SP database, when received 1792 * <base, address(SD), (lifetime(H),) policy> 1793 * from the user(?). 1794 * Adding to SP database, 1795 * and send 1796 * <base, address(SD), (lifetime(H),) policy> 1797 * to the socket which was send. 1798 * 1799 * SPDADD set a unique policy entry. 1800 * SPDSETIDX like SPDADD without a part of policy requests. 1801 * SPDUPDATE replace a unique policy entry. 1802 * 1803 * m will always be freed. 1804 */ 1805 static int 1806 key_spdadd(struct socket *so, struct mbuf *m, 1807 const struct sadb_msghdr *mhp) 1808 { 1809 const struct sadb_address *src0, *dst0; 1810 const struct sadb_x_policy *xpl0; 1811 struct sadb_x_policy *xpl; 1812 const struct sadb_lifetime *lft = NULL; 1813 struct secpolicyindex spidx; 1814 struct secpolicy *newsp; 1815 int error; 1816 1817 /* sanity check */ 1818 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 1819 panic("key_spdadd: NULL pointer is passed"); 1820 1821 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1822 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1823 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1824 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1825 return key_senderror(so, m, EINVAL); 1826 } 1827 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1828 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1829 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1830 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1831 return key_senderror(so, m, EINVAL); 1832 } 1833 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1834 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1835 < sizeof(struct sadb_lifetime)) { 1836 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1837 return key_senderror(so, m, EINVAL); 1838 } 1839 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1840 } 1841 1842 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1843 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1844 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1845 1846 /* make secindex */ 1847 /* XXX boundary check against sa_len */ 1848 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1849 src0 + 1, 1850 dst0 + 1, 1851 src0->sadb_address_prefixlen, 1852 dst0->sadb_address_prefixlen, 1853 src0->sadb_address_proto, 1854 &spidx); 1855 1856 /* checking the direciton. */ 1857 switch (xpl0->sadb_x_policy_dir) { 1858 case IPSEC_DIR_INBOUND: 1859 case IPSEC_DIR_OUTBOUND: 1860 break; 1861 default: 1862 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1863 mhp->msg->sadb_msg_errno = EINVAL; 1864 return 0; 1865 } 1866 1867 /* check policy */ 1868 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1869 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1870 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1871 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1872 return key_senderror(so, m, EINVAL); 1873 } 1874 1875 /* policy requests are mandatory when action is ipsec. */ 1876 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1877 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1878 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1879 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1880 return key_senderror(so, m, EINVAL); 1881 } 1882 1883 /* 1884 * checking there is SP already or not. 1885 * SPDUPDATE doesn't depend on whether there is a SP or not. 1886 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1887 * then error. 1888 */ 1889 newsp = key_getsp(&spidx); 1890 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1891 if (newsp) { 1892 key_sp_dead(newsp); 1893 key_sp_unlink(newsp); /* XXX jrs ordering */ 1894 KEY_FREESP(&newsp); 1895 newsp = NULL; 1896 } 1897 } else { 1898 if (newsp != NULL) { 1899 KEY_FREESP(&newsp); 1900 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1901 return key_senderror(so, m, EEXIST); 1902 } 1903 } 1904 1905 /* allocation new SP entry */ 1906 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1907 return key_senderror(so, m, error); 1908 } 1909 1910 if ((newsp->id = key_getnewspid()) == 0) { 1911 KFREE(newsp); 1912 return key_senderror(so, m, ENOBUFS); 1913 } 1914 1915 /* XXX boundary check against sa_len */ 1916 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1917 src0 + 1, 1918 dst0 + 1, 1919 src0->sadb_address_prefixlen, 1920 dst0->sadb_address_prefixlen, 1921 src0->sadb_address_proto, 1922 &newsp->spidx); 1923 1924 /* sanity check on addr pair */ 1925 if (((const struct sockaddr *)(src0 + 1))->sa_family != 1926 ((const struct sockaddr *)(dst0+ 1))->sa_family) { 1927 KFREE(newsp); 1928 return key_senderror(so, m, EINVAL); 1929 } 1930 if (((const struct sockaddr *)(src0 + 1))->sa_len != 1931 ((const struct sockaddr *)(dst0+ 1))->sa_len) { 1932 KFREE(newsp); 1933 return key_senderror(so, m, EINVAL); 1934 } 1935 1936 newsp->created = time_uptime; 1937 newsp->lastused = newsp->created; 1938 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1939 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1940 1941 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1942 newsp->state = IPSEC_SPSTATE_ALIVE; 1943 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1944 1945 /* delete the entry in spacqtree */ 1946 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1947 struct secspacq *spacq; 1948 if ((spacq = key_getspacq(&spidx)) != NULL) { 1949 /* reset counter in order to deletion by timehandler. */ 1950 spacq->created = time_uptime; 1951 spacq->count = 0; 1952 } 1953 } 1954 1955 #if defined(__NetBSD__) 1956 /* Invalidate all cached SPD pointers in the PCBs. */ 1957 ipsec_invalpcbcacheall(); 1958 1959 #if defined(GATEWAY) 1960 /* Invalidate the ipflow cache, as well. */ 1961 ipflow_invalidate_all(0); 1962 #ifdef INET6 1963 ip6flow_invalidate_all(0); 1964 #endif /* INET6 */ 1965 #endif /* GATEWAY */ 1966 #endif /* __NetBSD__ */ 1967 1968 { 1969 struct mbuf *n, *mpolicy; 1970 struct sadb_msg *newmsg; 1971 int off; 1972 1973 /* create new sadb_msg to reply. */ 1974 if (lft) { 1975 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1976 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1977 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1978 } else { 1979 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1980 SADB_X_EXT_POLICY, 1981 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1982 } 1983 if (!n) 1984 return key_senderror(so, m, ENOBUFS); 1985 1986 if (n->m_len < sizeof(*newmsg)) { 1987 n = m_pullup(n, sizeof(*newmsg)); 1988 if (!n) 1989 return key_senderror(so, m, ENOBUFS); 1990 } 1991 newmsg = mtod(n, struct sadb_msg *); 1992 newmsg->sadb_msg_errno = 0; 1993 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1994 1995 off = 0; 1996 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1997 sizeof(*xpl), &off); 1998 if (mpolicy == NULL) { 1999 /* n is already freed */ 2000 return key_senderror(so, m, ENOBUFS); 2001 } 2002 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2003 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2004 m_freem(n); 2005 return key_senderror(so, m, EINVAL); 2006 } 2007 xpl->sadb_x_policy_id = newsp->id; 2008 2009 m_freem(m); 2010 key_update_used(); 2011 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2012 } 2013 } 2014 2015 /* 2016 * get new policy id. 2017 * OUT: 2018 * 0: failure. 2019 * others: success. 2020 */ 2021 static u_int32_t 2022 key_getnewspid(void) 2023 { 2024 u_int32_t newid = 0; 2025 int count = key_spi_trycnt; /* XXX */ 2026 struct secpolicy *sp; 2027 2028 /* when requesting to allocate spi ranged */ 2029 while (count--) { 2030 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2031 2032 if ((sp = key_getspbyid(newid)) == NULL) 2033 break; 2034 2035 KEY_FREESP(&sp); 2036 } 2037 2038 if (count == 0 || newid == 0) { 2039 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2040 return 0; 2041 } 2042 2043 return newid; 2044 } 2045 2046 /* 2047 * SADB_SPDDELETE processing 2048 * receive 2049 * <base, address(SD), policy(*)> 2050 * from the user(?), and set SADB_SASTATE_DEAD, 2051 * and send, 2052 * <base, address(SD), policy(*)> 2053 * to the ikmpd. 2054 * policy(*) including direction of policy. 2055 * 2056 * m will always be freed. 2057 */ 2058 static int 2059 key_spddelete(struct socket *so, struct mbuf *m, 2060 const struct sadb_msghdr *mhp) 2061 { 2062 struct sadb_address *src0, *dst0; 2063 struct sadb_x_policy *xpl0; 2064 struct secpolicyindex spidx; 2065 struct secpolicy *sp; 2066 2067 /* sanity check */ 2068 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2069 panic("key_spddelete: NULL pointer is passed"); 2070 2071 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2072 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2073 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2074 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2075 return key_senderror(so, m, EINVAL); 2076 } 2077 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2078 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2079 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2080 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2081 return key_senderror(so, m, EINVAL); 2082 } 2083 2084 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2085 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2086 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2087 2088 /* make secindex */ 2089 /* XXX boundary check against sa_len */ 2090 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2091 src0 + 1, 2092 dst0 + 1, 2093 src0->sadb_address_prefixlen, 2094 dst0->sadb_address_prefixlen, 2095 src0->sadb_address_proto, 2096 &spidx); 2097 2098 /* checking the direciton. */ 2099 switch (xpl0->sadb_x_policy_dir) { 2100 case IPSEC_DIR_INBOUND: 2101 case IPSEC_DIR_OUTBOUND: 2102 break; 2103 default: 2104 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2105 return key_senderror(so, m, EINVAL); 2106 } 2107 2108 /* Is there SP in SPD ? */ 2109 if ((sp = key_getsp(&spidx)) == NULL) { 2110 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2111 return key_senderror(so, m, EINVAL); 2112 } 2113 2114 /* save policy id to buffer to be returned. */ 2115 xpl0->sadb_x_policy_id = sp->id; 2116 2117 key_sp_dead(sp); 2118 key_sp_unlink(sp); /* XXX jrs ordering */ 2119 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2120 2121 #if defined(__NetBSD__) 2122 /* Invalidate all cached SPD pointers in the PCBs. */ 2123 ipsec_invalpcbcacheall(); 2124 2125 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2126 #endif /* __NetBSD__ */ 2127 2128 { 2129 struct mbuf *n; 2130 struct sadb_msg *newmsg; 2131 2132 /* create new sadb_msg to reply. */ 2133 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2134 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2135 if (!n) 2136 return key_senderror(so, m, ENOBUFS); 2137 2138 newmsg = mtod(n, struct sadb_msg *); 2139 newmsg->sadb_msg_errno = 0; 2140 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2141 2142 m_freem(m); 2143 key_update_used(); 2144 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2145 } 2146 } 2147 2148 /* 2149 * SADB_SPDDELETE2 processing 2150 * receive 2151 * <base, policy(*)> 2152 * from the user(?), and set SADB_SASTATE_DEAD, 2153 * and send, 2154 * <base, policy(*)> 2155 * to the ikmpd. 2156 * policy(*) including direction of policy. 2157 * 2158 * m will always be freed. 2159 */ 2160 static int 2161 key_spddelete2(struct socket *so, struct mbuf *m, 2162 const struct sadb_msghdr *mhp) 2163 { 2164 u_int32_t id; 2165 struct secpolicy *sp; 2166 2167 /* sanity check */ 2168 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2169 panic("key_spddelete2: NULL pointer is passed"); 2170 2171 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2172 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2173 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2174 key_senderror(so, m, EINVAL); 2175 return 0; 2176 } 2177 2178 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2179 2180 /* Is there SP in SPD ? */ 2181 if ((sp = key_getspbyid(id)) == NULL) { 2182 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2183 return key_senderror(so, m, EINVAL); 2184 } 2185 2186 key_sp_dead(sp); 2187 key_sp_unlink(sp); /* XXX jrs ordering */ 2188 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2189 sp = NULL; 2190 2191 #if defined(__NetBSD__) 2192 /* Invalidate all cached SPD pointers in the PCBs. */ 2193 ipsec_invalpcbcacheall(); 2194 2195 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2196 #endif /* __NetBSD__ */ 2197 2198 { 2199 struct mbuf *n, *nn; 2200 struct sadb_msg *newmsg; 2201 int off, len; 2202 2203 /* create new sadb_msg to reply. */ 2204 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2205 2206 if (len > MCLBYTES) 2207 return key_senderror(so, m, ENOBUFS); 2208 MGETHDR(n, M_DONTWAIT, MT_DATA); 2209 if (n && len > MHLEN) { 2210 MCLGET(n, M_DONTWAIT); 2211 if ((n->m_flags & M_EXT) == 0) { 2212 m_freem(n); 2213 n = NULL; 2214 } 2215 } 2216 if (!n) 2217 return key_senderror(so, m, ENOBUFS); 2218 2219 n->m_len = len; 2220 n->m_next = NULL; 2221 off = 0; 2222 2223 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2224 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2225 2226 #ifdef DIAGNOSTIC 2227 if (off != len) 2228 panic("length inconsistency in key_spddelete2"); 2229 #endif 2230 2231 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2232 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2233 if (!n->m_next) { 2234 m_freem(n); 2235 return key_senderror(so, m, ENOBUFS); 2236 } 2237 2238 n->m_pkthdr.len = 0; 2239 for (nn = n; nn; nn = nn->m_next) 2240 n->m_pkthdr.len += nn->m_len; 2241 2242 newmsg = mtod(n, struct sadb_msg *); 2243 newmsg->sadb_msg_errno = 0; 2244 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2245 2246 m_freem(m); 2247 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2248 } 2249 } 2250 2251 /* 2252 * SADB_X_GET processing 2253 * receive 2254 * <base, policy(*)> 2255 * from the user(?), 2256 * and send, 2257 * <base, address(SD), policy> 2258 * to the ikmpd. 2259 * policy(*) including direction of policy. 2260 * 2261 * m will always be freed. 2262 */ 2263 static int 2264 key_spdget(struct socket *so, struct mbuf *m, 2265 const struct sadb_msghdr *mhp) 2266 { 2267 u_int32_t id; 2268 struct secpolicy *sp; 2269 struct mbuf *n; 2270 2271 /* sanity check */ 2272 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2273 panic("key_spdget: NULL pointer is passed"); 2274 2275 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2276 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2277 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2278 return key_senderror(so, m, EINVAL); 2279 } 2280 2281 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2282 2283 /* Is there SP in SPD ? */ 2284 if ((sp = key_getspbyid(id)) == NULL) { 2285 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2286 return key_senderror(so, m, ENOENT); 2287 } 2288 2289 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2290 mhp->msg->sadb_msg_pid); 2291 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2292 if (n != NULL) { 2293 m_freem(m); 2294 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2295 } else 2296 return key_senderror(so, m, ENOBUFS); 2297 } 2298 2299 /* 2300 * SADB_X_SPDACQUIRE processing. 2301 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2302 * send 2303 * <base, policy(*)> 2304 * to KMD, and expect to receive 2305 * <base> with SADB_X_SPDACQUIRE if error occurred, 2306 * or 2307 * <base, policy> 2308 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2309 * policy(*) is without policy requests. 2310 * 2311 * 0 : succeed 2312 * others: error number 2313 */ 2314 int 2315 key_spdacquire(const struct secpolicy *sp) 2316 { 2317 struct mbuf *result = NULL, *m; 2318 struct secspacq *newspacq; 2319 int error; 2320 2321 /* sanity check */ 2322 if (sp == NULL) 2323 panic("key_spdacquire: NULL pointer is passed"); 2324 if (sp->req != NULL) 2325 panic("key_spdacquire: called but there is request"); 2326 if (sp->policy != IPSEC_POLICY_IPSEC) 2327 panic("key_spdacquire: policy mismathed. IPsec is expected"); 2328 2329 /* Get an entry to check whether sent message or not. */ 2330 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2331 if (key_blockacq_count < newspacq->count) { 2332 /* reset counter and do send message. */ 2333 newspacq->count = 0; 2334 } else { 2335 /* increment counter and do nothing. */ 2336 newspacq->count++; 2337 return 0; 2338 } 2339 } else { 2340 /* make new entry for blocking to send SADB_ACQUIRE. */ 2341 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2342 return ENOBUFS; 2343 2344 /* add to acqtree */ 2345 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2346 } 2347 2348 /* create new sadb_msg to reply. */ 2349 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2350 if (!m) { 2351 error = ENOBUFS; 2352 goto fail; 2353 } 2354 result = m; 2355 2356 result->m_pkthdr.len = 0; 2357 for (m = result; m; m = m->m_next) 2358 result->m_pkthdr.len += m->m_len; 2359 2360 mtod(result, struct sadb_msg *)->sadb_msg_len = 2361 PFKEY_UNIT64(result->m_pkthdr.len); 2362 2363 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2364 2365 fail: 2366 if (result) 2367 m_freem(result); 2368 return error; 2369 } 2370 2371 /* 2372 * SADB_SPDFLUSH processing 2373 * receive 2374 * <base> 2375 * from the user, and free all entries in secpctree. 2376 * and send, 2377 * <base> 2378 * to the user. 2379 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2380 * 2381 * m will always be freed. 2382 */ 2383 static int 2384 key_spdflush(struct socket *so, struct mbuf *m, 2385 const struct sadb_msghdr *mhp) 2386 { 2387 struct sadb_msg *newmsg; 2388 struct secpolicy *sp; 2389 u_int dir; 2390 2391 /* sanity check */ 2392 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2393 panic("key_spdflush: NULL pointer is passed"); 2394 2395 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2396 return key_senderror(so, m, EINVAL); 2397 2398 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2399 struct secpolicy * nextsp; 2400 for (sp = LIST_FIRST(&sptree[dir]); 2401 sp != NULL; 2402 sp = nextsp) { 2403 2404 nextsp = LIST_NEXT(sp, chain); 2405 if (sp->state == IPSEC_SPSTATE_DEAD) 2406 continue; 2407 key_sp_dead(sp); 2408 key_sp_unlink(sp); 2409 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2410 continue; 2411 } 2412 } 2413 2414 #if defined(__NetBSD__) 2415 /* Invalidate all cached SPD pointers in the PCBs. */ 2416 ipsec_invalpcbcacheall(); 2417 2418 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2419 #endif /* __NetBSD__ */ 2420 2421 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2422 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2423 return key_senderror(so, m, ENOBUFS); 2424 } 2425 2426 if (m->m_next) 2427 m_freem(m->m_next); 2428 m->m_next = NULL; 2429 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2430 newmsg = mtod(m, struct sadb_msg *); 2431 newmsg->sadb_msg_errno = 0; 2432 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2433 2434 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2435 } 2436 2437 static struct sockaddr key_src = { 2438 .sa_len = 2, 2439 .sa_family = PF_KEY, 2440 }; 2441 2442 static struct mbuf * 2443 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2444 { 2445 struct secpolicy *sp; 2446 int cnt; 2447 u_int dir; 2448 struct mbuf *m, *n, *prev; 2449 int totlen; 2450 2451 *lenp = 0; 2452 2453 /* search SPD entry and get buffer size. */ 2454 cnt = 0; 2455 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2456 LIST_FOREACH(sp, &sptree[dir], chain) { 2457 cnt++; 2458 } 2459 } 2460 2461 if (cnt == 0) { 2462 *errorp = ENOENT; 2463 return (NULL); 2464 } 2465 2466 m = NULL; 2467 prev = m; 2468 totlen = 0; 2469 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2470 LIST_FOREACH(sp, &sptree[dir], chain) { 2471 --cnt; 2472 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2473 2474 if (!n) { 2475 *errorp = ENOBUFS; 2476 if (m) m_freem(m); 2477 return (NULL); 2478 } 2479 2480 totlen += n->m_pkthdr.len; 2481 if (!m) { 2482 m = n; 2483 } else { 2484 prev->m_nextpkt = n; 2485 } 2486 prev = n; 2487 } 2488 } 2489 2490 *lenp = totlen; 2491 *errorp = 0; 2492 return (m); 2493 } 2494 2495 /* 2496 * SADB_SPDDUMP processing 2497 * receive 2498 * <base> 2499 * from the user, and dump all SP leaves 2500 * and send, 2501 * <base> ..... 2502 * to the ikmpd. 2503 * 2504 * m will always be freed. 2505 */ 2506 static int 2507 key_spddump(struct socket *so, struct mbuf *m0, 2508 const struct sadb_msghdr *mhp) 2509 { 2510 struct mbuf *n; 2511 int error, len; 2512 int ok, s; 2513 pid_t pid; 2514 2515 /* sanity check */ 2516 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 2517 panic("key_spddump: NULL pointer is passed"); 2518 2519 2520 pid = mhp->msg->sadb_msg_pid; 2521 /* 2522 * If the requestor has insufficient socket-buffer space 2523 * for the entire chain, nobody gets any response to the DUMP. 2524 * XXX For now, only the requestor ever gets anything. 2525 * Moreover, if the requestor has any space at all, they receive 2526 * the entire chain, otherwise the request is refused with ENOBUFS. 2527 */ 2528 if (sbspace(&so->so_rcv) <= 0) { 2529 return key_senderror(so, m0, ENOBUFS); 2530 } 2531 2532 s = splsoftnet(); 2533 n = key_setspddump_chain(&error, &len, pid); 2534 splx(s); 2535 2536 if (n == NULL) { 2537 return key_senderror(so, m0, ENOENT); 2538 } 2539 { 2540 uint64_t *ps = PFKEY_STAT_GETREF(); 2541 ps[PFKEY_STAT_IN_TOTAL]++; 2542 ps[PFKEY_STAT_IN_BYTES] += len; 2543 PFKEY_STAT_PUTREF(); 2544 } 2545 2546 /* 2547 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2548 * The requestor receives either the entire chain, or an 2549 * error message with ENOBUFS. 2550 */ 2551 2552 /* 2553 * sbappendchainwith record takes the chain of entries, one 2554 * packet-record per SPD entry, prepends the key_src sockaddr 2555 * to each packet-record, links the sockaddr mbufs into a new 2556 * list of records, then appends the entire resulting 2557 * list to the requesting socket. 2558 */ 2559 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2560 n, SB_PRIO_ONESHOT_OVERFLOW); 2561 2562 if (!ok) { 2563 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2564 m_freem(n); 2565 return key_senderror(so, m0, ENOBUFS); 2566 } 2567 2568 m_freem(m0); 2569 return error; 2570 } 2571 2572 /* 2573 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2574 */ 2575 static int 2576 key_nat_map(struct socket *so, struct mbuf *m, 2577 const struct sadb_msghdr *mhp) 2578 { 2579 struct sadb_x_nat_t_type *type; 2580 struct sadb_x_nat_t_port *sport; 2581 struct sadb_x_nat_t_port *dport; 2582 struct sadb_address *iaddr, *raddr; 2583 struct sadb_x_nat_t_frag *frag; 2584 2585 /* sanity check */ 2586 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2587 panic("key_nat_map: NULL pointer is passed."); 2588 2589 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2590 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2591 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2592 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2593 return key_senderror(so, m, EINVAL); 2594 } 2595 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2596 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2597 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2598 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2599 return key_senderror(so, m, EINVAL); 2600 } 2601 2602 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2603 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2604 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2605 return key_senderror(so, m, EINVAL); 2606 } 2607 2608 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2609 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2610 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2611 return key_senderror(so, m, EINVAL); 2612 } 2613 2614 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2615 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2616 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2617 return key_senderror(so, m, EINVAL); 2618 } 2619 2620 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2621 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2622 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2623 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2624 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2625 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2626 2627 /* 2628 * XXX handle that, it should also contain a SA, or anything 2629 * that enable to update the SA information. 2630 */ 2631 2632 return 0; 2633 } 2634 2635 static struct mbuf * 2636 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2637 { 2638 struct mbuf *result = NULL, *m; 2639 2640 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2641 if (!m) 2642 goto fail; 2643 result = m; 2644 2645 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2646 &sp->spidx.src.sa, sp->spidx.prefs, 2647 sp->spidx.ul_proto); 2648 if (!m) 2649 goto fail; 2650 m_cat(result, m); 2651 2652 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2653 &sp->spidx.dst.sa, sp->spidx.prefd, 2654 sp->spidx.ul_proto); 2655 if (!m) 2656 goto fail; 2657 m_cat(result, m); 2658 2659 m = key_sp2msg(sp); 2660 if (!m) 2661 goto fail; 2662 m_cat(result, m); 2663 2664 if ((result->m_flags & M_PKTHDR) == 0) 2665 goto fail; 2666 2667 if (result->m_len < sizeof(struct sadb_msg)) { 2668 result = m_pullup(result, sizeof(struct sadb_msg)); 2669 if (result == NULL) 2670 goto fail; 2671 } 2672 2673 result->m_pkthdr.len = 0; 2674 for (m = result; m; m = m->m_next) 2675 result->m_pkthdr.len += m->m_len; 2676 2677 mtod(result, struct sadb_msg *)->sadb_msg_len = 2678 PFKEY_UNIT64(result->m_pkthdr.len); 2679 2680 return result; 2681 2682 fail: 2683 m_freem(result); 2684 return NULL; 2685 } 2686 2687 /* 2688 * get PFKEY message length for security policy and request. 2689 */ 2690 static u_int 2691 key_getspreqmsglen(const struct secpolicy *sp) 2692 { 2693 u_int tlen; 2694 2695 tlen = sizeof(struct sadb_x_policy); 2696 2697 /* if is the policy for ipsec ? */ 2698 if (sp->policy != IPSEC_POLICY_IPSEC) 2699 return tlen; 2700 2701 /* get length of ipsec requests */ 2702 { 2703 const struct ipsecrequest *isr; 2704 int len; 2705 2706 for (isr = sp->req; isr != NULL; isr = isr->next) { 2707 len = sizeof(struct sadb_x_ipsecrequest) 2708 + isr->saidx.src.sa.sa_len 2709 + isr->saidx.dst.sa.sa_len; 2710 2711 tlen += PFKEY_ALIGN8(len); 2712 } 2713 } 2714 2715 return tlen; 2716 } 2717 2718 /* 2719 * SADB_SPDEXPIRE processing 2720 * send 2721 * <base, address(SD), lifetime(CH), policy> 2722 * to KMD by PF_KEY. 2723 * 2724 * OUT: 0 : succeed 2725 * others : error number 2726 */ 2727 static int 2728 key_spdexpire(struct secpolicy *sp) 2729 { 2730 int s; 2731 struct mbuf *result = NULL, *m; 2732 int len; 2733 int error = -1; 2734 struct sadb_lifetime *lt; 2735 2736 /* XXX: Why do we lock ? */ 2737 s = splsoftnet(); /*called from softclock()*/ 2738 2739 /* sanity check */ 2740 if (sp == NULL) 2741 panic("key_spdexpire: NULL pointer is passed"); 2742 2743 /* set msg header */ 2744 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2745 if (!m) { 2746 error = ENOBUFS; 2747 goto fail; 2748 } 2749 result = m; 2750 2751 /* create lifetime extension (current and hard) */ 2752 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2753 m = key_alloc_mbuf(len); 2754 if (!m || m->m_next) { /*XXX*/ 2755 if (m) 2756 m_freem(m); 2757 error = ENOBUFS; 2758 goto fail; 2759 } 2760 memset(mtod(m, void *), 0, len); 2761 lt = mtod(m, struct sadb_lifetime *); 2762 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2763 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2764 lt->sadb_lifetime_allocations = 0; 2765 lt->sadb_lifetime_bytes = 0; 2766 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2767 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2768 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2769 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2770 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2771 lt->sadb_lifetime_allocations = 0; 2772 lt->sadb_lifetime_bytes = 0; 2773 lt->sadb_lifetime_addtime = sp->lifetime; 2774 lt->sadb_lifetime_usetime = sp->validtime; 2775 m_cat(result, m); 2776 2777 /* set sadb_address for source */ 2778 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2779 &sp->spidx.src.sa, 2780 sp->spidx.prefs, sp->spidx.ul_proto); 2781 if (!m) { 2782 error = ENOBUFS; 2783 goto fail; 2784 } 2785 m_cat(result, m); 2786 2787 /* set sadb_address for destination */ 2788 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2789 &sp->spidx.dst.sa, 2790 sp->spidx.prefd, sp->spidx.ul_proto); 2791 if (!m) { 2792 error = ENOBUFS; 2793 goto fail; 2794 } 2795 m_cat(result, m); 2796 2797 /* set secpolicy */ 2798 m = key_sp2msg(sp); 2799 if (!m) { 2800 error = ENOBUFS; 2801 goto fail; 2802 } 2803 m_cat(result, m); 2804 2805 if ((result->m_flags & M_PKTHDR) == 0) { 2806 error = EINVAL; 2807 goto fail; 2808 } 2809 2810 if (result->m_len < sizeof(struct sadb_msg)) { 2811 result = m_pullup(result, sizeof(struct sadb_msg)); 2812 if (result == NULL) { 2813 error = ENOBUFS; 2814 goto fail; 2815 } 2816 } 2817 2818 result->m_pkthdr.len = 0; 2819 for (m = result; m; m = m->m_next) 2820 result->m_pkthdr.len += m->m_len; 2821 2822 mtod(result, struct sadb_msg *)->sadb_msg_len = 2823 PFKEY_UNIT64(result->m_pkthdr.len); 2824 2825 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2826 2827 fail: 2828 if (result) 2829 m_freem(result); 2830 splx(s); 2831 return error; 2832 } 2833 2834 /* %%% SAD management */ 2835 /* 2836 * allocating a memory for new SA head, and copy from the values of mhp. 2837 * OUT: NULL : failure due to the lack of memory. 2838 * others : pointer to new SA head. 2839 */ 2840 static struct secashead * 2841 key_newsah(const struct secasindex *saidx) 2842 { 2843 struct secashead *newsah; 2844 2845 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx")); 2846 2847 newsah = (struct secashead *) 2848 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2849 if (newsah != NULL) { 2850 int i; 2851 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2852 LIST_INIT(&newsah->savtree[i]); 2853 newsah->saidx = *saidx; 2854 2855 /* add to saidxtree */ 2856 newsah->state = SADB_SASTATE_MATURE; 2857 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2858 } 2859 return(newsah); 2860 } 2861 2862 /* 2863 * delete SA index and all SA registerd. 2864 */ 2865 static void 2866 key_delsah(struct secashead *sah) 2867 { 2868 struct secasvar *sav, *nextsav; 2869 u_int stateidx, state; 2870 int s; 2871 int zombie = 0; 2872 2873 /* sanity check */ 2874 if (sah == NULL) 2875 panic("key_delsah: NULL pointer is passed"); 2876 2877 s = splsoftnet(); /*called from softclock()*/ 2878 2879 /* searching all SA registerd in the secindex. */ 2880 for (stateidx = 0; 2881 stateidx < _ARRAYLEN(saorder_state_any); 2882 stateidx++) { 2883 2884 state = saorder_state_any[stateidx]; 2885 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2886 sav != NULL; 2887 sav = nextsav) { 2888 2889 nextsav = LIST_NEXT(sav, chain); 2890 2891 if (sav->refcnt == 0) { 2892 /* sanity check */ 2893 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2894 KEY_FREESAV(&sav); 2895 } else { 2896 /* give up to delete this sa */ 2897 zombie++; 2898 } 2899 } 2900 } 2901 2902 /* don't delete sah only if there are savs. */ 2903 if (zombie) { 2904 splx(s); 2905 return; 2906 } 2907 2908 rtcache_free(&sah->sa_route); 2909 2910 /* remove from tree of SA index */ 2911 if (__LIST_CHAINED(sah)) 2912 LIST_REMOVE(sah, chain); 2913 2914 KFREE(sah); 2915 2916 splx(s); 2917 return; 2918 } 2919 2920 /* 2921 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2922 * and copy the values of mhp into new buffer. 2923 * When SAD message type is GETSPI: 2924 * to set sequence number from acq_seq++, 2925 * to set zero to SPI. 2926 * not to call key_setsava(). 2927 * OUT: NULL : fail 2928 * others : pointer to new secasvar. 2929 * 2930 * does not modify mbuf. does not free mbuf on error. 2931 */ 2932 static struct secasvar * 2933 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2934 struct secashead *sah, int *errp, 2935 const char* where, int tag) 2936 { 2937 struct secasvar *newsav; 2938 const struct sadb_sa *xsa; 2939 2940 /* sanity check */ 2941 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) 2942 panic("key_newsa: NULL pointer is passed"); 2943 2944 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2945 if (newsav == NULL) { 2946 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2947 *errp = ENOBUFS; 2948 goto done; 2949 } 2950 memset(newsav, 0, sizeof(struct secasvar)); 2951 2952 switch (mhp->msg->sadb_msg_type) { 2953 case SADB_GETSPI: 2954 newsav->spi = 0; 2955 2956 #ifdef IPSEC_DOSEQCHECK 2957 /* sync sequence number */ 2958 if (mhp->msg->sadb_msg_seq == 0) 2959 newsav->seq = 2960 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2961 else 2962 #endif 2963 newsav->seq = mhp->msg->sadb_msg_seq; 2964 break; 2965 2966 case SADB_ADD: 2967 /* sanity check */ 2968 if (mhp->ext[SADB_EXT_SA] == NULL) { 2969 KFREE(newsav), newsav = NULL; 2970 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2971 *errp = EINVAL; 2972 goto done; 2973 } 2974 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2975 newsav->spi = xsa->sadb_sa_spi; 2976 newsav->seq = mhp->msg->sadb_msg_seq; 2977 break; 2978 default: 2979 KFREE(newsav), newsav = NULL; 2980 *errp = EINVAL; 2981 goto done; 2982 } 2983 2984 /* copy sav values */ 2985 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2986 *errp = key_setsaval(newsav, m, mhp); 2987 if (*errp) { 2988 KFREE(newsav), newsav = NULL; 2989 goto done; 2990 } 2991 } 2992 2993 /* reset created */ 2994 newsav->created = time_uptime; 2995 newsav->pid = mhp->msg->sadb_msg_pid; 2996 2997 /* add to satree */ 2998 newsav->sah = sah; 2999 newsav->refcnt = 1; 3000 newsav->state = SADB_SASTATE_LARVAL; 3001 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 3002 secasvar, chain); 3003 done: 3004 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3005 printf("DP %s from %s:%u return SP:%p\n", __func__, 3006 where, tag, newsav)); 3007 3008 return newsav; 3009 } 3010 3011 /* 3012 * free() SA variable entry. 3013 */ 3014 static void 3015 key_delsav(struct secasvar *sav) 3016 { 3017 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav")); 3018 IPSEC_ASSERT(sav->refcnt == 0, 3019 ("key_delsav: reference count %u > 0", sav->refcnt)); 3020 3021 /* remove from SA header */ 3022 if (__LIST_CHAINED(sav)) 3023 LIST_REMOVE(sav, chain); 3024 3025 /* 3026 * Cleanup xform state. Note that zeroize'ing causes the 3027 * keys to be cleared; otherwise we must do it ourself. 3028 */ 3029 if (sav->tdb_xform != NULL) { 3030 sav->tdb_xform->xf_zeroize(sav); 3031 sav->tdb_xform = NULL; 3032 } else { 3033 if (sav->key_auth != NULL) 3034 explicit_memset(_KEYBUF(sav->key_auth), 0, 3035 _KEYLEN(sav->key_auth)); 3036 if (sav->key_enc != NULL) 3037 explicit_memset(_KEYBUF(sav->key_enc), 0, 3038 _KEYLEN(sav->key_enc)); 3039 } 3040 if (sav->key_auth != NULL) { 3041 KFREE(sav->key_auth); 3042 sav->key_auth = NULL; 3043 } 3044 if (sav->key_enc != NULL) { 3045 KFREE(sav->key_enc); 3046 sav->key_enc = NULL; 3047 } 3048 if (sav->replay != NULL) { 3049 KFREE(sav->replay); 3050 sav->replay = NULL; 3051 } 3052 if (sav->lft_c != NULL) { 3053 KFREE(sav->lft_c); 3054 sav->lft_c = NULL; 3055 } 3056 if (sav->lft_h != NULL) { 3057 KFREE(sav->lft_h); 3058 sav->lft_h = NULL; 3059 } 3060 if (sav->lft_s != NULL) { 3061 KFREE(sav->lft_s); 3062 sav->lft_s = NULL; 3063 } 3064 3065 KFREE(sav); 3066 3067 return; 3068 } 3069 3070 /* 3071 * search SAD. 3072 * OUT: 3073 * NULL : not found 3074 * others : found, pointer to a SA. 3075 */ 3076 static struct secashead * 3077 key_getsah(const struct secasindex *saidx) 3078 { 3079 struct secashead *sah; 3080 3081 LIST_FOREACH(sah, &sahtree, chain) { 3082 if (sah->state == SADB_SASTATE_DEAD) 3083 continue; 3084 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3085 return sah; 3086 } 3087 3088 return NULL; 3089 } 3090 3091 /* 3092 * check not to be duplicated SPI. 3093 * NOTE: this function is too slow due to searching all SAD. 3094 * OUT: 3095 * NULL : not found 3096 * others : found, pointer to a SA. 3097 */ 3098 static struct secasvar * 3099 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3100 { 3101 struct secashead *sah; 3102 struct secasvar *sav; 3103 3104 /* check address family */ 3105 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3106 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3107 return NULL; 3108 } 3109 3110 /* check all SAD */ 3111 LIST_FOREACH(sah, &sahtree, chain) { 3112 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3113 continue; 3114 sav = key_getsavbyspi(sah, spi); 3115 if (sav != NULL) 3116 return sav; 3117 } 3118 3119 return NULL; 3120 } 3121 3122 /* 3123 * search SAD litmited alive SA, protocol, SPI. 3124 * OUT: 3125 * NULL : not found 3126 * others : found, pointer to a SA. 3127 */ 3128 static struct secasvar * 3129 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3130 { 3131 struct secasvar *sav; 3132 u_int stateidx, state; 3133 3134 /* search all status */ 3135 for (stateidx = 0; 3136 stateidx < _ARRAYLEN(saorder_state_alive); 3137 stateidx++) { 3138 3139 state = saorder_state_alive[stateidx]; 3140 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3141 3142 /* sanity check */ 3143 if (sav->state != state) { 3144 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3145 "invalid sav->state (queue: %d SA: %d)\n", 3146 state, sav->state)); 3147 continue; 3148 } 3149 3150 if (sav->spi == spi) 3151 return sav; 3152 } 3153 } 3154 3155 return NULL; 3156 } 3157 3158 /* 3159 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3160 * You must update these if need. 3161 * OUT: 0: success. 3162 * !0: failure. 3163 * 3164 * does not modify mbuf. does not free mbuf on error. 3165 */ 3166 static int 3167 key_setsaval(struct secasvar *sav, struct mbuf *m, 3168 const struct sadb_msghdr *mhp) 3169 { 3170 int error = 0; 3171 3172 /* sanity check */ 3173 if (m == NULL || mhp == NULL || mhp->msg == NULL) 3174 panic("key_setsaval: NULL pointer is passed"); 3175 3176 /* initialization */ 3177 sav->replay = NULL; 3178 sav->key_auth = NULL; 3179 sav->key_enc = NULL; 3180 sav->lft_c = NULL; 3181 sav->lft_h = NULL; 3182 sav->lft_s = NULL; 3183 sav->tdb_xform = NULL; /* transform */ 3184 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3185 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3186 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3187 sav->natt_type = 0; 3188 sav->esp_frag = 0; 3189 3190 /* SA */ 3191 if (mhp->ext[SADB_EXT_SA] != NULL) { 3192 const struct sadb_sa *sa0; 3193 3194 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3195 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3196 error = EINVAL; 3197 goto fail; 3198 } 3199 3200 sav->alg_auth = sa0->sadb_sa_auth; 3201 sav->alg_enc = sa0->sadb_sa_encrypt; 3202 sav->flags = sa0->sadb_sa_flags; 3203 3204 /* replay window */ 3205 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3206 sav->replay = (struct secreplay *) 3207 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3208 if (sav->replay == NULL) { 3209 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3210 error = ENOBUFS; 3211 goto fail; 3212 } 3213 if (sa0->sadb_sa_replay != 0) 3214 sav->replay->bitmap = (char*)(sav->replay+1); 3215 sav->replay->wsize = sa0->sadb_sa_replay; 3216 } 3217 } 3218 3219 /* Authentication keys */ 3220 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3221 const struct sadb_key *key0; 3222 int len; 3223 3224 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3225 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3226 3227 error = 0; 3228 if (len < sizeof(*key0)) { 3229 error = EINVAL; 3230 goto fail; 3231 } 3232 switch (mhp->msg->sadb_msg_satype) { 3233 case SADB_SATYPE_AH: 3234 case SADB_SATYPE_ESP: 3235 case SADB_X_SATYPE_TCPSIGNATURE: 3236 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3237 sav->alg_auth != SADB_X_AALG_NULL) 3238 error = EINVAL; 3239 break; 3240 case SADB_X_SATYPE_IPCOMP: 3241 default: 3242 error = EINVAL; 3243 break; 3244 } 3245 if (error) { 3246 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3247 goto fail; 3248 } 3249 3250 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3251 if (sav->key_auth == NULL) { 3252 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3253 error = ENOBUFS; 3254 goto fail; 3255 } 3256 } 3257 3258 /* Encryption key */ 3259 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3260 const struct sadb_key *key0; 3261 int len; 3262 3263 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3264 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3265 3266 error = 0; 3267 if (len < sizeof(*key0)) { 3268 error = EINVAL; 3269 goto fail; 3270 } 3271 switch (mhp->msg->sadb_msg_satype) { 3272 case SADB_SATYPE_ESP: 3273 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3274 sav->alg_enc != SADB_EALG_NULL) { 3275 error = EINVAL; 3276 break; 3277 } 3278 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3279 if (sav->key_enc == NULL) { 3280 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3281 error = ENOBUFS; 3282 goto fail; 3283 } 3284 break; 3285 case SADB_X_SATYPE_IPCOMP: 3286 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3287 error = EINVAL; 3288 sav->key_enc = NULL; /*just in case*/ 3289 break; 3290 case SADB_SATYPE_AH: 3291 case SADB_X_SATYPE_TCPSIGNATURE: 3292 default: 3293 error = EINVAL; 3294 break; 3295 } 3296 if (error) { 3297 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3298 goto fail; 3299 } 3300 } 3301 3302 /* set iv */ 3303 sav->ivlen = 0; 3304 3305 switch (mhp->msg->sadb_msg_satype) { 3306 case SADB_SATYPE_AH: 3307 error = xform_init(sav, XF_AH); 3308 break; 3309 case SADB_SATYPE_ESP: 3310 error = xform_init(sav, XF_ESP); 3311 break; 3312 case SADB_X_SATYPE_IPCOMP: 3313 error = xform_init(sav, XF_IPCOMP); 3314 break; 3315 case SADB_X_SATYPE_TCPSIGNATURE: 3316 error = xform_init(sav, XF_TCPSIGNATURE); 3317 break; 3318 } 3319 if (error) { 3320 ipseclog((LOG_DEBUG, 3321 "key_setsaval: unable to initialize SA type %u.\n", 3322 mhp->msg->sadb_msg_satype)); 3323 goto fail; 3324 } 3325 3326 /* reset created */ 3327 sav->created = time_uptime; 3328 3329 /* make lifetime for CURRENT */ 3330 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3331 sizeof(struct sadb_lifetime)); 3332 if (sav->lft_c == NULL) { 3333 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3334 error = ENOBUFS; 3335 goto fail; 3336 } 3337 3338 sav->lft_c->sadb_lifetime_len = 3339 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3340 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3341 sav->lft_c->sadb_lifetime_allocations = 0; 3342 sav->lft_c->sadb_lifetime_bytes = 0; 3343 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3344 sav->lft_c->sadb_lifetime_usetime = 0; 3345 3346 /* lifetimes for HARD and SOFT */ 3347 { 3348 const struct sadb_lifetime *lft0; 3349 3350 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3351 if (lft0 != NULL) { 3352 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3353 error = EINVAL; 3354 goto fail; 3355 } 3356 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3357 sizeof(*lft0)); 3358 if (sav->lft_h == NULL) { 3359 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3360 error = ENOBUFS; 3361 goto fail; 3362 } 3363 /* to be initialize ? */ 3364 } 3365 3366 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3367 if (lft0 != NULL) { 3368 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3369 error = EINVAL; 3370 goto fail; 3371 } 3372 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3373 sizeof(*lft0)); 3374 if (sav->lft_s == NULL) { 3375 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3376 error = ENOBUFS; 3377 goto fail; 3378 } 3379 /* to be initialize ? */ 3380 } 3381 } 3382 3383 return 0; 3384 3385 fail: 3386 /* initialization */ 3387 if (sav->replay != NULL) { 3388 KFREE(sav->replay); 3389 sav->replay = NULL; 3390 } 3391 if (sav->key_auth != NULL) { 3392 KFREE(sav->key_auth); 3393 sav->key_auth = NULL; 3394 } 3395 if (sav->key_enc != NULL) { 3396 KFREE(sav->key_enc); 3397 sav->key_enc = NULL; 3398 } 3399 if (sav->lft_c != NULL) { 3400 KFREE(sav->lft_c); 3401 sav->lft_c = NULL; 3402 } 3403 if (sav->lft_h != NULL) { 3404 KFREE(sav->lft_h); 3405 sav->lft_h = NULL; 3406 } 3407 if (sav->lft_s != NULL) { 3408 KFREE(sav->lft_s); 3409 sav->lft_s = NULL; 3410 } 3411 3412 return error; 3413 } 3414 3415 /* 3416 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3417 * OUT: 0: valid 3418 * other: errno 3419 */ 3420 static int 3421 key_mature(struct secasvar *sav) 3422 { 3423 int error; 3424 3425 /* check SPI value */ 3426 switch (sav->sah->saidx.proto) { 3427 case IPPROTO_ESP: 3428 case IPPROTO_AH: 3429 if (ntohl(sav->spi) <= 255) { 3430 ipseclog((LOG_DEBUG, 3431 "key_mature: illegal range of SPI %u.\n", 3432 (u_int32_t)ntohl(sav->spi))); 3433 return EINVAL; 3434 } 3435 break; 3436 } 3437 3438 /* check satype */ 3439 switch (sav->sah->saidx.proto) { 3440 case IPPROTO_ESP: 3441 /* check flags */ 3442 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3443 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3444 ipseclog((LOG_DEBUG, "key_mature: " 3445 "invalid flag (derived) given to old-esp.\n")); 3446 return EINVAL; 3447 } 3448 error = xform_init(sav, XF_ESP); 3449 break; 3450 case IPPROTO_AH: 3451 /* check flags */ 3452 if (sav->flags & SADB_X_EXT_DERIV) { 3453 ipseclog((LOG_DEBUG, "key_mature: " 3454 "invalid flag (derived) given to AH SA.\n")); 3455 return EINVAL; 3456 } 3457 if (sav->alg_enc != SADB_EALG_NONE) { 3458 ipseclog((LOG_DEBUG, "key_mature: " 3459 "protocol and algorithm mismated.\n")); 3460 return(EINVAL); 3461 } 3462 error = xform_init(sav, XF_AH); 3463 break; 3464 case IPPROTO_IPCOMP: 3465 if (sav->alg_auth != SADB_AALG_NONE) { 3466 ipseclog((LOG_DEBUG, "key_mature: " 3467 "protocol and algorithm mismated.\n")); 3468 return(EINVAL); 3469 } 3470 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3471 && ntohl(sav->spi) >= 0x10000) { 3472 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3473 return(EINVAL); 3474 } 3475 error = xform_init(sav, XF_IPCOMP); 3476 break; 3477 case IPPROTO_TCP: 3478 if (sav->alg_enc != SADB_EALG_NONE) { 3479 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3480 "mismated.\n", __func__)); 3481 return(EINVAL); 3482 } 3483 error = xform_init(sav, XF_TCPSIGNATURE); 3484 break; 3485 default: 3486 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3487 error = EPROTONOSUPPORT; 3488 break; 3489 } 3490 if (error == 0) 3491 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3492 return (error); 3493 } 3494 3495 /* 3496 * subroutine for SADB_GET and SADB_DUMP. 3497 */ 3498 static struct mbuf * 3499 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3500 u_int32_t seq, u_int32_t pid) 3501 { 3502 struct mbuf *result = NULL, *tres = NULL, *m; 3503 int l = 0; 3504 int i; 3505 void *p; 3506 struct sadb_lifetime lt; 3507 int dumporder[] = { 3508 SADB_EXT_SA, SADB_X_EXT_SA2, 3509 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3510 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3511 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3512 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3513 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3514 SADB_X_EXT_NAT_T_TYPE, 3515 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3516 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3517 SADB_X_EXT_NAT_T_FRAG, 3518 3519 }; 3520 3521 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3522 if (m == NULL) 3523 goto fail; 3524 result = m; 3525 3526 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3527 m = NULL; 3528 p = NULL; 3529 switch (dumporder[i]) { 3530 case SADB_EXT_SA: 3531 m = key_setsadbsa(sav); 3532 break; 3533 3534 case SADB_X_EXT_SA2: 3535 m = key_setsadbxsa2(sav->sah->saidx.mode, 3536 sav->replay ? sav->replay->count : 0, 3537 sav->sah->saidx.reqid); 3538 break; 3539 3540 case SADB_EXT_ADDRESS_SRC: 3541 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3542 &sav->sah->saidx.src.sa, 3543 FULLMASK, IPSEC_ULPROTO_ANY); 3544 break; 3545 3546 case SADB_EXT_ADDRESS_DST: 3547 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3548 &sav->sah->saidx.dst.sa, 3549 FULLMASK, IPSEC_ULPROTO_ANY); 3550 break; 3551 3552 case SADB_EXT_KEY_AUTH: 3553 if (!sav->key_auth) 3554 continue; 3555 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3556 p = sav->key_auth; 3557 break; 3558 3559 case SADB_EXT_KEY_ENCRYPT: 3560 if (!sav->key_enc) 3561 continue; 3562 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3563 p = sav->key_enc; 3564 break; 3565 3566 case SADB_EXT_LIFETIME_CURRENT: 3567 if (!sav->lft_c) 3568 continue; 3569 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3570 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3571 lt.sadb_lifetime_addtime += time_second - time_uptime; 3572 lt.sadb_lifetime_usetime += time_second - time_uptime; 3573 p = < 3574 break; 3575 3576 case SADB_EXT_LIFETIME_HARD: 3577 if (!sav->lft_h) 3578 continue; 3579 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3580 p = sav->lft_h; 3581 break; 3582 3583 case SADB_EXT_LIFETIME_SOFT: 3584 if (!sav->lft_s) 3585 continue; 3586 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3587 p = sav->lft_s; 3588 break; 3589 3590 case SADB_X_EXT_NAT_T_TYPE: 3591 m = key_setsadbxtype(sav->natt_type); 3592 break; 3593 3594 case SADB_X_EXT_NAT_T_DPORT: 3595 if (sav->natt_type == 0) 3596 continue; 3597 m = key_setsadbxport( 3598 key_portfromsaddr(&sav->sah->saidx.dst), 3599 SADB_X_EXT_NAT_T_DPORT); 3600 break; 3601 3602 case SADB_X_EXT_NAT_T_SPORT: 3603 if (sav->natt_type == 0) 3604 continue; 3605 m = key_setsadbxport( 3606 key_portfromsaddr(&sav->sah->saidx.src), 3607 SADB_X_EXT_NAT_T_SPORT); 3608 break; 3609 3610 case SADB_X_EXT_NAT_T_FRAG: 3611 /* don't send frag info if not set */ 3612 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3613 continue; 3614 m = key_setsadbxfrag(sav->esp_frag); 3615 break; 3616 3617 case SADB_X_EXT_NAT_T_OAI: 3618 case SADB_X_EXT_NAT_T_OAR: 3619 continue; 3620 3621 case SADB_EXT_ADDRESS_PROXY: 3622 case SADB_EXT_IDENTITY_SRC: 3623 case SADB_EXT_IDENTITY_DST: 3624 /* XXX: should we brought from SPD ? */ 3625 case SADB_EXT_SENSITIVITY: 3626 default: 3627 continue; 3628 } 3629 3630 KASSERT(!(m && p)); 3631 if (!m && !p) 3632 goto fail; 3633 if (p && tres) { 3634 M_PREPEND(tres, l, M_DONTWAIT); 3635 if (!tres) 3636 goto fail; 3637 memcpy(mtod(tres, void *), p, l); 3638 continue; 3639 } 3640 if (p) { 3641 m = key_alloc_mbuf(l); 3642 if (!m) 3643 goto fail; 3644 m_copyback(m, 0, l, p); 3645 } 3646 3647 if (tres) 3648 m_cat(m, tres); 3649 tres = m; 3650 } 3651 3652 m_cat(result, tres); 3653 tres = NULL; /* avoid free on error below */ 3654 3655 if (result->m_len < sizeof(struct sadb_msg)) { 3656 result = m_pullup(result, sizeof(struct sadb_msg)); 3657 if (result == NULL) 3658 goto fail; 3659 } 3660 3661 result->m_pkthdr.len = 0; 3662 for (m = result; m; m = m->m_next) 3663 result->m_pkthdr.len += m->m_len; 3664 3665 mtod(result, struct sadb_msg *)->sadb_msg_len = 3666 PFKEY_UNIT64(result->m_pkthdr.len); 3667 3668 return result; 3669 3670 fail: 3671 m_freem(result); 3672 m_freem(tres); 3673 return NULL; 3674 } 3675 3676 3677 /* 3678 * set a type in sadb_x_nat_t_type 3679 */ 3680 static struct mbuf * 3681 key_setsadbxtype(u_int16_t type) 3682 { 3683 struct mbuf *m; 3684 size_t len; 3685 struct sadb_x_nat_t_type *p; 3686 3687 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3688 3689 m = key_alloc_mbuf(len); 3690 if (!m || m->m_next) { /*XXX*/ 3691 if (m) 3692 m_freem(m); 3693 return NULL; 3694 } 3695 3696 p = mtod(m, struct sadb_x_nat_t_type *); 3697 3698 memset(p, 0, len); 3699 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3700 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3701 p->sadb_x_nat_t_type_type = type; 3702 3703 return m; 3704 } 3705 /* 3706 * set a port in sadb_x_nat_t_port. port is in network order 3707 */ 3708 static struct mbuf * 3709 key_setsadbxport(u_int16_t port, u_int16_t type) 3710 { 3711 struct mbuf *m; 3712 size_t len; 3713 struct sadb_x_nat_t_port *p; 3714 3715 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3716 3717 m = key_alloc_mbuf(len); 3718 if (!m || m->m_next) { /*XXX*/ 3719 if (m) 3720 m_freem(m); 3721 return NULL; 3722 } 3723 3724 p = mtod(m, struct sadb_x_nat_t_port *); 3725 3726 memset(p, 0, len); 3727 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3728 p->sadb_x_nat_t_port_exttype = type; 3729 p->sadb_x_nat_t_port_port = port; 3730 3731 return m; 3732 } 3733 3734 /* 3735 * set fragmentation info in sadb_x_nat_t_frag 3736 */ 3737 static struct mbuf * 3738 key_setsadbxfrag(u_int16_t flen) 3739 { 3740 struct mbuf *m; 3741 size_t len; 3742 struct sadb_x_nat_t_frag *p; 3743 3744 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3745 3746 m = key_alloc_mbuf(len); 3747 if (!m || m->m_next) { /*XXX*/ 3748 if (m) 3749 m_freem(m); 3750 return NULL; 3751 } 3752 3753 p = mtod(m, struct sadb_x_nat_t_frag *); 3754 3755 memset(p, 0, len); 3756 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3757 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3758 p->sadb_x_nat_t_frag_fraglen = flen; 3759 3760 return m; 3761 } 3762 3763 /* 3764 * Get port from sockaddr, port is in network order 3765 */ 3766 u_int16_t 3767 key_portfromsaddr(const union sockaddr_union *saddr) 3768 { 3769 u_int16_t port; 3770 3771 switch (saddr->sa.sa_family) { 3772 case AF_INET: { 3773 port = saddr->sin.sin_port; 3774 break; 3775 } 3776 #ifdef INET6 3777 case AF_INET6: { 3778 port = saddr->sin6.sin6_port; 3779 break; 3780 } 3781 #endif 3782 default: 3783 printf("%s: unexpected address family\n", __func__); 3784 port = 0; 3785 break; 3786 } 3787 3788 return port; 3789 } 3790 3791 3792 /* 3793 * Set port is struct sockaddr. port is in network order 3794 */ 3795 static void 3796 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3797 { 3798 switch (saddr->sa.sa_family) { 3799 case AF_INET: { 3800 saddr->sin.sin_port = port; 3801 break; 3802 } 3803 #ifdef INET6 3804 case AF_INET6: { 3805 saddr->sin6.sin6_port = port; 3806 break; 3807 } 3808 #endif 3809 default: 3810 printf("%s: unexpected address family %d\n", __func__, 3811 saddr->sa.sa_family); 3812 break; 3813 } 3814 3815 return; 3816 } 3817 3818 /* 3819 * Safety check sa_len 3820 */ 3821 static int 3822 key_checksalen(const union sockaddr_union *saddr) 3823 { 3824 switch (saddr->sa.sa_family) { 3825 case AF_INET: 3826 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3827 return -1; 3828 break; 3829 #ifdef INET6 3830 case AF_INET6: 3831 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3832 return -1; 3833 break; 3834 #endif 3835 default: 3836 printf("%s: unexpected sa_family %d\n", __func__, 3837 saddr->sa.sa_family); 3838 return -1; 3839 break; 3840 } 3841 return 0; 3842 } 3843 3844 3845 /* 3846 * set data into sadb_msg. 3847 */ 3848 static struct mbuf * 3849 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3850 u_int32_t seq, pid_t pid, u_int16_t reserved) 3851 { 3852 struct mbuf *m; 3853 struct sadb_msg *p; 3854 int len; 3855 3856 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3857 if (len > MCLBYTES) 3858 return NULL; 3859 MGETHDR(m, M_DONTWAIT, MT_DATA); 3860 if (m && len > MHLEN) { 3861 MCLGET(m, M_DONTWAIT); 3862 if ((m->m_flags & M_EXT) == 0) { 3863 m_freem(m); 3864 m = NULL; 3865 } 3866 } 3867 if (!m) 3868 return NULL; 3869 m->m_pkthdr.len = m->m_len = len; 3870 m->m_next = NULL; 3871 3872 p = mtod(m, struct sadb_msg *); 3873 3874 memset(p, 0, len); 3875 p->sadb_msg_version = PF_KEY_V2; 3876 p->sadb_msg_type = type; 3877 p->sadb_msg_errno = 0; 3878 p->sadb_msg_satype = satype; 3879 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3880 p->sadb_msg_reserved = reserved; 3881 p->sadb_msg_seq = seq; 3882 p->sadb_msg_pid = (u_int32_t)pid; 3883 3884 return m; 3885 } 3886 3887 /* 3888 * copy secasvar data into sadb_address. 3889 */ 3890 static struct mbuf * 3891 key_setsadbsa(struct secasvar *sav) 3892 { 3893 struct mbuf *m; 3894 struct sadb_sa *p; 3895 int len; 3896 3897 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3898 m = key_alloc_mbuf(len); 3899 if (!m || m->m_next) { /*XXX*/ 3900 if (m) 3901 m_freem(m); 3902 return NULL; 3903 } 3904 3905 p = mtod(m, struct sadb_sa *); 3906 3907 memset(p, 0, len); 3908 p->sadb_sa_len = PFKEY_UNIT64(len); 3909 p->sadb_sa_exttype = SADB_EXT_SA; 3910 p->sadb_sa_spi = sav->spi; 3911 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3912 p->sadb_sa_state = sav->state; 3913 p->sadb_sa_auth = sav->alg_auth; 3914 p->sadb_sa_encrypt = sav->alg_enc; 3915 p->sadb_sa_flags = sav->flags; 3916 3917 return m; 3918 } 3919 3920 /* 3921 * set data into sadb_address. 3922 */ 3923 static struct mbuf * 3924 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3925 u_int8_t prefixlen, u_int16_t ul_proto) 3926 { 3927 struct mbuf *m; 3928 struct sadb_address *p; 3929 size_t len; 3930 3931 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3932 PFKEY_ALIGN8(saddr->sa_len); 3933 m = key_alloc_mbuf(len); 3934 if (!m || m->m_next) { /*XXX*/ 3935 if (m) 3936 m_freem(m); 3937 return NULL; 3938 } 3939 3940 p = mtod(m, struct sadb_address *); 3941 3942 memset(p, 0, len); 3943 p->sadb_address_len = PFKEY_UNIT64(len); 3944 p->sadb_address_exttype = exttype; 3945 p->sadb_address_proto = ul_proto; 3946 if (prefixlen == FULLMASK) { 3947 switch (saddr->sa_family) { 3948 case AF_INET: 3949 prefixlen = sizeof(struct in_addr) << 3; 3950 break; 3951 case AF_INET6: 3952 prefixlen = sizeof(struct in6_addr) << 3; 3953 break; 3954 default: 3955 ; /*XXX*/ 3956 } 3957 } 3958 p->sadb_address_prefixlen = prefixlen; 3959 p->sadb_address_reserved = 0; 3960 3961 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3962 saddr, saddr->sa_len); 3963 3964 return m; 3965 } 3966 3967 #if 0 3968 /* 3969 * set data into sadb_ident. 3970 */ 3971 static struct mbuf * 3972 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3973 void *string, int stringlen, u_int64_t id) 3974 { 3975 struct mbuf *m; 3976 struct sadb_ident *p; 3977 size_t len; 3978 3979 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3980 m = key_alloc_mbuf(len); 3981 if (!m || m->m_next) { /*XXX*/ 3982 if (m) 3983 m_freem(m); 3984 return NULL; 3985 } 3986 3987 p = mtod(m, struct sadb_ident *); 3988 3989 memset(p, 0, len); 3990 p->sadb_ident_len = PFKEY_UNIT64(len); 3991 p->sadb_ident_exttype = exttype; 3992 p->sadb_ident_type = idtype; 3993 p->sadb_ident_reserved = 0; 3994 p->sadb_ident_id = id; 3995 3996 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3997 string, stringlen); 3998 3999 return m; 4000 } 4001 #endif 4002 4003 /* 4004 * set data into sadb_x_sa2. 4005 */ 4006 static struct mbuf * 4007 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 4008 { 4009 struct mbuf *m; 4010 struct sadb_x_sa2 *p; 4011 size_t len; 4012 4013 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4014 m = key_alloc_mbuf(len); 4015 if (!m || m->m_next) { /*XXX*/ 4016 if (m) 4017 m_freem(m); 4018 return NULL; 4019 } 4020 4021 p = mtod(m, struct sadb_x_sa2 *); 4022 4023 memset(p, 0, len); 4024 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4025 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4026 p->sadb_x_sa2_mode = mode; 4027 p->sadb_x_sa2_reserved1 = 0; 4028 p->sadb_x_sa2_reserved2 = 0; 4029 p->sadb_x_sa2_sequence = seq; 4030 p->sadb_x_sa2_reqid = reqid; 4031 4032 return m; 4033 } 4034 4035 /* 4036 * set data into sadb_x_policy 4037 */ 4038 static struct mbuf * 4039 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 4040 { 4041 struct mbuf *m; 4042 struct sadb_x_policy *p; 4043 size_t len; 4044 4045 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4046 m = key_alloc_mbuf(len); 4047 if (!m || m->m_next) { /*XXX*/ 4048 if (m) 4049 m_freem(m); 4050 return NULL; 4051 } 4052 4053 p = mtod(m, struct sadb_x_policy *); 4054 4055 memset(p, 0, len); 4056 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4057 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4058 p->sadb_x_policy_type = type; 4059 p->sadb_x_policy_dir = dir; 4060 p->sadb_x_policy_id = id; 4061 4062 return m; 4063 } 4064 4065 /* %%% utilities */ 4066 /* 4067 * copy a buffer into the new buffer allocated. 4068 */ 4069 static void * 4070 key_newbuf(const void *src, u_int len) 4071 { 4072 void *new; 4073 4074 KMALLOC(new, void *, len); 4075 if (new == NULL) { 4076 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 4077 return NULL; 4078 } 4079 memcpy(new, src, len); 4080 4081 return new; 4082 } 4083 4084 /* compare my own address 4085 * OUT: 1: true, i.e. my address. 4086 * 0: false 4087 */ 4088 int 4089 key_ismyaddr(const struct sockaddr *sa) 4090 { 4091 #ifdef INET 4092 const struct sockaddr_in *sin; 4093 const struct in_ifaddr *ia; 4094 #endif 4095 4096 /* sanity check */ 4097 if (sa == NULL) 4098 panic("key_ismyaddr: NULL pointer is passed"); 4099 4100 switch (sa->sa_family) { 4101 #ifdef INET 4102 case AF_INET: 4103 sin = (const struct sockaddr_in *)sa; 4104 for (ia = in_ifaddrhead.tqh_first; ia; 4105 ia = ia->ia_link.tqe_next) 4106 { 4107 if (sin->sin_family == ia->ia_addr.sin_family && 4108 sin->sin_len == ia->ia_addr.sin_len && 4109 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4110 { 4111 return 1; 4112 } 4113 } 4114 break; 4115 #endif 4116 #ifdef INET6 4117 case AF_INET6: 4118 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4119 #endif 4120 } 4121 4122 return 0; 4123 } 4124 4125 #ifdef INET6 4126 /* 4127 * compare my own address for IPv6. 4128 * 1: ours 4129 * 0: other 4130 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4131 */ 4132 #include <netinet6/in6_var.h> 4133 4134 static int 4135 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4136 { 4137 const struct in6_ifaddr *ia; 4138 const struct in6_multi *in6m; 4139 4140 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 4141 if (key_sockaddrcmp((const struct sockaddr *)&sin6, 4142 (const struct sockaddr *)&ia->ia_addr, 0) == 0) 4143 return 1; 4144 4145 /* 4146 * XXX Multicast 4147 * XXX why do we care about multlicast here while we don't care 4148 * about IPv4 multicast?? 4149 * XXX scope 4150 */ 4151 in6m = NULL; 4152 #ifdef __FreeBSD__ 4153 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 4154 #else 4155 for ((in6m) = ia->ia6_multiaddrs.lh_first; 4156 (in6m) != NULL && 4157 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); 4158 (in6m) = in6m->in6m_entry.le_next) 4159 continue; 4160 #endif 4161 if (in6m) 4162 return 1; 4163 } 4164 4165 /* loopback, just for safety */ 4166 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4167 return 1; 4168 4169 return 0; 4170 } 4171 #endif /*INET6*/ 4172 4173 /* 4174 * compare two secasindex structure. 4175 * flag can specify to compare 2 saidxes. 4176 * compare two secasindex structure without both mode and reqid. 4177 * don't compare port. 4178 * IN: 4179 * saidx0: source, it can be in SAD. 4180 * saidx1: object. 4181 * OUT: 4182 * 1 : equal 4183 * 0 : not equal 4184 */ 4185 static int 4186 key_cmpsaidx( 4187 const struct secasindex *saidx0, 4188 const struct secasindex *saidx1, 4189 int flag) 4190 { 4191 int chkport = 0; 4192 4193 /* sanity */ 4194 if (saidx0 == NULL && saidx1 == NULL) 4195 return 1; 4196 4197 if (saidx0 == NULL || saidx1 == NULL) 4198 return 0; 4199 4200 if (saidx0->proto != saidx1->proto) 4201 return 0; 4202 4203 if (flag == CMP_EXACTLY) { 4204 if (saidx0->mode != saidx1->mode) 4205 return 0; 4206 if (saidx0->reqid != saidx1->reqid) 4207 return 0; 4208 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4209 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4210 return 0; 4211 } else { 4212 4213 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4214 if (flag == CMP_MODE_REQID 4215 ||flag == CMP_REQID) { 4216 /* 4217 * If reqid of SPD is non-zero, unique SA is required. 4218 * The result must be of same reqid in this case. 4219 */ 4220 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4221 return 0; 4222 } 4223 4224 if (flag == CMP_MODE_REQID) { 4225 if (saidx0->mode != IPSEC_MODE_ANY 4226 && saidx0->mode != saidx1->mode) 4227 return 0; 4228 } 4229 4230 /* 4231 * If NAT-T is enabled, check ports for tunnel mode. 4232 * Don't do it for transport mode, as there is no 4233 * port information available in the SP. 4234 * Also don't check ports if they are set to zero 4235 * in the SPD: This means we have a non-generated 4236 * SPD which can't know UDP ports. 4237 */ 4238 if (saidx1->mode == IPSEC_MODE_TUNNEL && 4239 ((((const struct sockaddr *)(&saidx1->src))->sa_family == AF_INET && 4240 ((const struct sockaddr *)(&saidx1->dst))->sa_family == AF_INET && 4241 ((const struct sockaddr_in *)(&saidx1->src))->sin_port && 4242 ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) || 4243 (((const struct sockaddr *)(&saidx1->src))->sa_family == AF_INET6 && 4244 ((const struct sockaddr *)(&saidx1->dst))->sa_family == AF_INET6 && 4245 ((const struct sockaddr_in6 *)(&saidx1->src))->sin6_port && 4246 ((const struct sockaddr_in6 *)(&saidx1->dst))->sin6_port))) 4247 chkport = 1; 4248 4249 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4250 return 0; 4251 } 4252 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4253 return 0; 4254 } 4255 } 4256 4257 return 1; 4258 } 4259 4260 /* 4261 * compare two secindex structure exactly. 4262 * IN: 4263 * spidx0: source, it is often in SPD. 4264 * spidx1: object, it is often from PFKEY message. 4265 * OUT: 4266 * 1 : equal 4267 * 0 : not equal 4268 */ 4269 int 4270 key_cmpspidx_exactly( 4271 const struct secpolicyindex *spidx0, 4272 const struct secpolicyindex *spidx1) 4273 { 4274 /* sanity */ 4275 if (spidx0 == NULL && spidx1 == NULL) 4276 return 1; 4277 4278 if (spidx0 == NULL || spidx1 == NULL) 4279 return 0; 4280 4281 if (spidx0->prefs != spidx1->prefs 4282 || spidx0->prefd != spidx1->prefd 4283 || spidx0->ul_proto != spidx1->ul_proto) 4284 return 0; 4285 4286 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4287 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4288 } 4289 4290 /* 4291 * compare two secindex structure with mask. 4292 * IN: 4293 * spidx0: source, it is often in SPD. 4294 * spidx1: object, it is often from IP header. 4295 * OUT: 4296 * 1 : equal 4297 * 0 : not equal 4298 */ 4299 int 4300 key_cmpspidx_withmask( 4301 const struct secpolicyindex *spidx0, 4302 const struct secpolicyindex *spidx1) 4303 { 4304 /* sanity */ 4305 if (spidx0 == NULL && spidx1 == NULL) 4306 return 1; 4307 4308 if (spidx0 == NULL || spidx1 == NULL) 4309 return 0; 4310 4311 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4312 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4313 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4314 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4315 return 0; 4316 4317 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4318 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4319 && spidx0->ul_proto != spidx1->ul_proto) 4320 return 0; 4321 4322 switch (spidx0->src.sa.sa_family) { 4323 case AF_INET: 4324 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4325 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4326 return 0; 4327 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4328 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4329 return 0; 4330 break; 4331 case AF_INET6: 4332 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4333 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4334 return 0; 4335 /* 4336 * scope_id check. if sin6_scope_id is 0, we regard it 4337 * as a wildcard scope, which matches any scope zone ID. 4338 */ 4339 if (spidx0->src.sin6.sin6_scope_id && 4340 spidx1->src.sin6.sin6_scope_id && 4341 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4342 return 0; 4343 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4344 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4345 return 0; 4346 break; 4347 default: 4348 /* XXX */ 4349 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4350 return 0; 4351 break; 4352 } 4353 4354 switch (spidx0->dst.sa.sa_family) { 4355 case AF_INET: 4356 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4357 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4358 return 0; 4359 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4360 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4361 return 0; 4362 break; 4363 case AF_INET6: 4364 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4365 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4366 return 0; 4367 /* 4368 * scope_id check. if sin6_scope_id is 0, we regard it 4369 * as a wildcard scope, which matches any scope zone ID. 4370 */ 4371 if (spidx0->src.sin6.sin6_scope_id && 4372 spidx1->src.sin6.sin6_scope_id && 4373 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4374 return 0; 4375 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4376 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4377 return 0; 4378 break; 4379 default: 4380 /* XXX */ 4381 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4382 return 0; 4383 break; 4384 } 4385 4386 /* XXX Do we check other field ? e.g. flowinfo */ 4387 4388 return 1; 4389 } 4390 4391 /* returns 0 on match */ 4392 static int 4393 key_sockaddrcmp( 4394 const struct sockaddr *sa1, 4395 const struct sockaddr *sa2, 4396 int port) 4397 { 4398 #ifdef satosin 4399 #undef satosin 4400 #endif 4401 #define satosin(s) ((const struct sockaddr_in *)s) 4402 #ifdef satosin6 4403 #undef satosin6 4404 #endif 4405 #define satosin6(s) ((const struct sockaddr_in6 *)s) 4406 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4407 return 1; 4408 4409 switch (sa1->sa_family) { 4410 case AF_INET: 4411 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4412 return 1; 4413 if (satosin(sa1)->sin_addr.s_addr != 4414 satosin(sa2)->sin_addr.s_addr) { 4415 return 1; 4416 } 4417 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4418 return 1; 4419 break; 4420 case AF_INET6: 4421 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4422 return 1; /*EINVAL*/ 4423 if (satosin6(sa1)->sin6_scope_id != 4424 satosin6(sa2)->sin6_scope_id) { 4425 return 1; 4426 } 4427 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4428 &satosin6(sa2)->sin6_addr)) { 4429 return 1; 4430 } 4431 if (port && 4432 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4433 return 1; 4434 } 4435 break; 4436 default: 4437 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4438 return 1; 4439 break; 4440 } 4441 4442 return 0; 4443 #undef satosin 4444 #undef satosin6 4445 } 4446 4447 /* 4448 * compare two buffers with mask. 4449 * IN: 4450 * addr1: source 4451 * addr2: object 4452 * bits: Number of bits to compare 4453 * OUT: 4454 * 1 : equal 4455 * 0 : not equal 4456 */ 4457 static int 4458 key_bbcmp(const void *a1, const void *a2, u_int bits) 4459 { 4460 const unsigned char *p1 = a1; 4461 const unsigned char *p2 = a2; 4462 4463 /* XXX: This could be considerably faster if we compare a word 4464 * at a time, but it is complicated on LSB Endian machines */ 4465 4466 /* Handle null pointers */ 4467 if (p1 == NULL || p2 == NULL) 4468 return (p1 == p2); 4469 4470 while (bits >= 8) { 4471 if (*p1++ != *p2++) 4472 return 0; 4473 bits -= 8; 4474 } 4475 4476 if (bits > 0) { 4477 u_int8_t mask = ~((1<<(8-bits))-1); 4478 if ((*p1 & mask) != (*p2 & mask)) 4479 return 0; 4480 } 4481 return 1; /* Match! */ 4482 } 4483 4484 /* 4485 * time handler. 4486 * scanning SPD and SAD to check status for each entries, 4487 * and do to remove or to expire. 4488 */ 4489 void 4490 key_timehandler(void* arg) 4491 { 4492 u_int dir; 4493 int s; 4494 time_t now = time_uptime; 4495 4496 s = splsoftnet(); /*called from softclock()*/ 4497 mutex_enter(softnet_lock); 4498 4499 /* SPD */ 4500 { 4501 struct secpolicy *sp, *nextsp; 4502 4503 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4504 for (sp = LIST_FIRST(&sptree[dir]); 4505 sp != NULL; 4506 sp = nextsp) { 4507 4508 nextsp = LIST_NEXT(sp, chain); 4509 4510 if (sp->state == IPSEC_SPSTATE_DEAD) { 4511 key_sp_unlink(sp); /*XXX*/ 4512 4513 /* 'sp' dead; continue transfers to 4514 * 'sp = nextsp' 4515 */ 4516 continue; 4517 } 4518 4519 if (sp->lifetime == 0 && sp->validtime == 0) 4520 continue; 4521 4522 /* the deletion will occur next time */ 4523 if ((sp->lifetime && now - sp->created > sp->lifetime) 4524 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4525 key_sp_dead(sp); 4526 key_spdexpire(sp); 4527 continue; 4528 } 4529 } 4530 } 4531 } 4532 4533 /* SAD */ 4534 { 4535 struct secashead *sah, *nextsah; 4536 struct secasvar *sav, *nextsav; 4537 4538 for (sah = LIST_FIRST(&sahtree); 4539 sah != NULL; 4540 sah = nextsah) { 4541 4542 nextsah = LIST_NEXT(sah, chain); 4543 4544 /* if sah has been dead, then delete it and process next sah. */ 4545 if (sah->state == SADB_SASTATE_DEAD) { 4546 key_delsah(sah); 4547 continue; 4548 } 4549 4550 /* if LARVAL entry doesn't become MATURE, delete it. */ 4551 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4552 sav != NULL; 4553 sav = nextsav) { 4554 4555 nextsav = LIST_NEXT(sav, chain); 4556 4557 if (now - sav->created > key_larval_lifetime) { 4558 KEY_FREESAV(&sav); 4559 } 4560 } 4561 4562 /* 4563 * check MATURE entry to start to send expire message 4564 * whether or not. 4565 */ 4566 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4567 sav != NULL; 4568 sav = nextsav) { 4569 4570 nextsav = LIST_NEXT(sav, chain); 4571 4572 /* we don't need to check. */ 4573 if (sav->lft_s == NULL) 4574 continue; 4575 4576 /* sanity check */ 4577 if (sav->lft_c == NULL) { 4578 ipseclog((LOG_DEBUG,"key_timehandler: " 4579 "There is no CURRENT time, why?\n")); 4580 continue; 4581 } 4582 4583 /* check SOFT lifetime */ 4584 if (sav->lft_s->sadb_lifetime_addtime != 0 4585 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4586 /* 4587 * check SA to be used whether or not. 4588 * when SA hasn't been used, delete it. 4589 */ 4590 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4591 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4592 KEY_FREESAV(&sav); 4593 } else { 4594 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4595 /* 4596 * XXX If we keep to send expire 4597 * message in the status of 4598 * DYING. Do remove below code. 4599 */ 4600 key_expire(sav); 4601 } 4602 } 4603 /* check SOFT lifetime by bytes */ 4604 /* 4605 * XXX I don't know the way to delete this SA 4606 * when new SA is installed. Caution when it's 4607 * installed too big lifetime by time. 4608 */ 4609 else if (sav->lft_s->sadb_lifetime_bytes != 0 4610 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4611 4612 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4613 /* 4614 * XXX If we keep to send expire 4615 * message in the status of 4616 * DYING. Do remove below code. 4617 */ 4618 key_expire(sav); 4619 } 4620 } 4621 4622 /* check DYING entry to change status to DEAD. */ 4623 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4624 sav != NULL; 4625 sav = nextsav) { 4626 4627 nextsav = LIST_NEXT(sav, chain); 4628 4629 /* we don't need to check. */ 4630 if (sav->lft_h == NULL) 4631 continue; 4632 4633 /* sanity check */ 4634 if (sav->lft_c == NULL) { 4635 ipseclog((LOG_DEBUG, "key_timehandler: " 4636 "There is no CURRENT time, why?\n")); 4637 continue; 4638 } 4639 4640 if (sav->lft_h->sadb_lifetime_addtime != 0 4641 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4642 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4643 KEY_FREESAV(&sav); 4644 } 4645 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4646 else if (sav->lft_s != NULL 4647 && sav->lft_s->sadb_lifetime_addtime != 0 4648 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4649 /* 4650 * XXX: should be checked to be 4651 * installed the valid SA. 4652 */ 4653 4654 /* 4655 * If there is no SA then sending 4656 * expire message. 4657 */ 4658 key_expire(sav); 4659 } 4660 #endif 4661 /* check HARD lifetime by bytes */ 4662 else if (sav->lft_h->sadb_lifetime_bytes != 0 4663 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4664 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4665 KEY_FREESAV(&sav); 4666 } 4667 } 4668 4669 /* delete entry in DEAD */ 4670 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4671 sav != NULL; 4672 sav = nextsav) { 4673 4674 nextsav = LIST_NEXT(sav, chain); 4675 4676 /* sanity check */ 4677 if (sav->state != SADB_SASTATE_DEAD) { 4678 ipseclog((LOG_DEBUG, "key_timehandler: " 4679 "invalid sav->state " 4680 "(queue: %d SA: %d): " 4681 "kill it anyway\n", 4682 SADB_SASTATE_DEAD, sav->state)); 4683 } 4684 4685 /* 4686 * do not call key_freesav() here. 4687 * sav should already be freed, and sav->refcnt 4688 * shows other references to sav 4689 * (such as from SPD). 4690 */ 4691 } 4692 } 4693 } 4694 4695 #ifndef IPSEC_NONBLOCK_ACQUIRE 4696 /* ACQ tree */ 4697 { 4698 struct secacq *acq, *nextacq; 4699 4700 for (acq = LIST_FIRST(&acqtree); 4701 acq != NULL; 4702 acq = nextacq) { 4703 4704 nextacq = LIST_NEXT(acq, chain); 4705 4706 if (now - acq->created > key_blockacq_lifetime 4707 && __LIST_CHAINED(acq)) { 4708 LIST_REMOVE(acq, chain); 4709 KFREE(acq); 4710 } 4711 } 4712 } 4713 #endif 4714 4715 /* SP ACQ tree */ 4716 { 4717 struct secspacq *acq, *nextacq; 4718 4719 for (acq = LIST_FIRST(&spacqtree); 4720 acq != NULL; 4721 acq = nextacq) { 4722 4723 nextacq = LIST_NEXT(acq, chain); 4724 4725 if (now - acq->created > key_blockacq_lifetime 4726 && __LIST_CHAINED(acq)) { 4727 LIST_REMOVE(acq, chain); 4728 KFREE(acq); 4729 } 4730 } 4731 } 4732 4733 #ifndef IPSEC_DEBUG2 4734 /* do exchange to tick time !! */ 4735 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4736 #endif /* IPSEC_DEBUG2 */ 4737 4738 mutex_exit(softnet_lock); 4739 splx(s); 4740 return; 4741 } 4742 4743 u_long 4744 key_random(void) 4745 { 4746 u_long value; 4747 4748 key_randomfill(&value, sizeof(value)); 4749 return value; 4750 } 4751 4752 void 4753 key_randomfill(void *p, size_t l) 4754 { 4755 4756 cprng_fast(p, l); 4757 } 4758 4759 /* 4760 * map SADB_SATYPE_* to IPPROTO_*. 4761 * if satype == SADB_SATYPE then satype is mapped to ~0. 4762 * OUT: 4763 * 0: invalid satype. 4764 */ 4765 static u_int16_t 4766 key_satype2proto(u_int8_t satype) 4767 { 4768 switch (satype) { 4769 case SADB_SATYPE_UNSPEC: 4770 return IPSEC_PROTO_ANY; 4771 case SADB_SATYPE_AH: 4772 return IPPROTO_AH; 4773 case SADB_SATYPE_ESP: 4774 return IPPROTO_ESP; 4775 case SADB_X_SATYPE_IPCOMP: 4776 return IPPROTO_IPCOMP; 4777 case SADB_X_SATYPE_TCPSIGNATURE: 4778 return IPPROTO_TCP; 4779 default: 4780 return 0; 4781 } 4782 /* NOTREACHED */ 4783 } 4784 4785 /* 4786 * map IPPROTO_* to SADB_SATYPE_* 4787 * OUT: 4788 * 0: invalid protocol type. 4789 */ 4790 static u_int8_t 4791 key_proto2satype(u_int16_t proto) 4792 { 4793 switch (proto) { 4794 case IPPROTO_AH: 4795 return SADB_SATYPE_AH; 4796 case IPPROTO_ESP: 4797 return SADB_SATYPE_ESP; 4798 case IPPROTO_IPCOMP: 4799 return SADB_X_SATYPE_IPCOMP; 4800 case IPPROTO_TCP: 4801 return SADB_X_SATYPE_TCPSIGNATURE; 4802 default: 4803 return 0; 4804 } 4805 /* NOTREACHED */ 4806 } 4807 4808 static int 4809 key_setsecasidx(int proto, int mode, int reqid, 4810 const struct sadb_address * src, 4811 const struct sadb_address * dst, 4812 struct secasindex * saidx) 4813 { 4814 const union sockaddr_union * src_u = 4815 (const union sockaddr_union *) src; 4816 const union sockaddr_union * dst_u = 4817 (const union sockaddr_union *) dst; 4818 4819 /* sa len safety check */ 4820 if (key_checksalen(src_u) != 0) 4821 return -1; 4822 if (key_checksalen(dst_u) != 0) 4823 return -1; 4824 4825 memset(saidx, 0, sizeof(*saidx)); 4826 saidx->proto = proto; 4827 saidx->mode = mode; 4828 saidx->reqid = reqid; 4829 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4830 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4831 4832 key_porttosaddr(&((saidx)->src),0); 4833 key_porttosaddr(&((saidx)->dst),0); 4834 return 0; 4835 } 4836 4837 /* %%% PF_KEY */ 4838 /* 4839 * SADB_GETSPI processing is to receive 4840 * <base, (SA2), src address, dst address, (SPI range)> 4841 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4842 * tree with the status of LARVAL, and send 4843 * <base, SA(*), address(SD)> 4844 * to the IKMPd. 4845 * 4846 * IN: mhp: pointer to the pointer to each header. 4847 * OUT: NULL if fail. 4848 * other if success, return pointer to the message to send. 4849 */ 4850 static int 4851 key_getspi(struct socket *so, struct mbuf *m, 4852 const struct sadb_msghdr *mhp) 4853 { 4854 struct sadb_address *src0, *dst0; 4855 struct secasindex saidx; 4856 struct secashead *newsah; 4857 struct secasvar *newsav; 4858 u_int8_t proto; 4859 u_int32_t spi; 4860 u_int8_t mode; 4861 u_int16_t reqid; 4862 int error; 4863 4864 /* sanity check */ 4865 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4866 panic("key_getspi: NULL pointer is passed"); 4867 4868 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4869 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4870 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4871 return key_senderror(so, m, EINVAL); 4872 } 4873 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4874 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4875 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4876 return key_senderror(so, m, EINVAL); 4877 } 4878 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4879 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4880 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4881 } else { 4882 mode = IPSEC_MODE_ANY; 4883 reqid = 0; 4884 } 4885 4886 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4887 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4888 4889 /* map satype to proto */ 4890 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4891 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4892 return key_senderror(so, m, EINVAL); 4893 } 4894 4895 4896 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 4897 dst0 + 1, &saidx)) != 0) 4898 return key_senderror(so, m, EINVAL); 4899 4900 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 4901 return key_senderror(so, m, EINVAL); 4902 4903 /* SPI allocation */ 4904 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4905 &saidx); 4906 if (spi == 0) 4907 return key_senderror(so, m, EINVAL); 4908 4909 /* get a SA index */ 4910 if ((newsah = key_getsah(&saidx)) == NULL) { 4911 /* create a new SA index */ 4912 if ((newsah = key_newsah(&saidx)) == NULL) { 4913 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4914 return key_senderror(so, m, ENOBUFS); 4915 } 4916 } 4917 4918 /* get a new SA */ 4919 /* XXX rewrite */ 4920 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4921 if (newsav == NULL) { 4922 /* XXX don't free new SA index allocated in above. */ 4923 return key_senderror(so, m, error); 4924 } 4925 4926 /* set spi */ 4927 newsav->spi = htonl(spi); 4928 4929 #ifndef IPSEC_NONBLOCK_ACQUIRE 4930 /* delete the entry in acqtree */ 4931 if (mhp->msg->sadb_msg_seq != 0) { 4932 struct secacq *acq; 4933 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4934 /* reset counter in order to deletion by timehandler. */ 4935 acq->created = time_uptime; 4936 acq->count = 0; 4937 } 4938 } 4939 #endif 4940 4941 { 4942 struct mbuf *n, *nn; 4943 struct sadb_sa *m_sa; 4944 struct sadb_msg *newmsg; 4945 int off, len; 4946 4947 /* create new sadb_msg to reply. */ 4948 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4949 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4950 if (len > MCLBYTES) 4951 return key_senderror(so, m, ENOBUFS); 4952 4953 MGETHDR(n, M_DONTWAIT, MT_DATA); 4954 if (len > MHLEN) { 4955 MCLGET(n, M_DONTWAIT); 4956 if ((n->m_flags & M_EXT) == 0) { 4957 m_freem(n); 4958 n = NULL; 4959 } 4960 } 4961 if (!n) 4962 return key_senderror(so, m, ENOBUFS); 4963 4964 n->m_len = len; 4965 n->m_next = NULL; 4966 off = 0; 4967 4968 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4969 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4970 4971 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4972 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4973 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4974 m_sa->sadb_sa_spi = htonl(spi); 4975 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4976 4977 #ifdef DIAGNOSTIC 4978 if (off != len) 4979 panic("length inconsistency in key_getspi"); 4980 #endif 4981 4982 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4983 SADB_EXT_ADDRESS_DST); 4984 if (!n->m_next) { 4985 m_freem(n); 4986 return key_senderror(so, m, ENOBUFS); 4987 } 4988 4989 if (n->m_len < sizeof(struct sadb_msg)) { 4990 n = m_pullup(n, sizeof(struct sadb_msg)); 4991 if (n == NULL) 4992 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4993 } 4994 4995 n->m_pkthdr.len = 0; 4996 for (nn = n; nn; nn = nn->m_next) 4997 n->m_pkthdr.len += nn->m_len; 4998 4999 newmsg = mtod(n, struct sadb_msg *); 5000 newmsg->sadb_msg_seq = newsav->seq; 5001 newmsg->sadb_msg_errno = 0; 5002 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5003 5004 m_freem(m); 5005 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5006 } 5007 } 5008 5009 /* 5010 * allocating new SPI 5011 * called by key_getspi(). 5012 * OUT: 5013 * 0: failure. 5014 * others: success. 5015 */ 5016 static u_int32_t 5017 key_do_getnewspi(const struct sadb_spirange *spirange, 5018 const struct secasindex *saidx) 5019 { 5020 u_int32_t newspi; 5021 u_int32_t spmin, spmax; 5022 int count = key_spi_trycnt; 5023 5024 /* set spi range to allocate */ 5025 if (spirange != NULL) { 5026 spmin = spirange->sadb_spirange_min; 5027 spmax = spirange->sadb_spirange_max; 5028 } else { 5029 spmin = key_spi_minval; 5030 spmax = key_spi_maxval; 5031 } 5032 /* IPCOMP needs 2-byte SPI */ 5033 if (saidx->proto == IPPROTO_IPCOMP) { 5034 u_int32_t t; 5035 if (spmin >= 0x10000) 5036 spmin = 0xffff; 5037 if (spmax >= 0x10000) 5038 spmax = 0xffff; 5039 if (spmin > spmax) { 5040 t = spmin; spmin = spmax; spmax = t; 5041 } 5042 } 5043 5044 if (spmin == spmax) { 5045 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5046 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 5047 return 0; 5048 } 5049 5050 count--; /* taking one cost. */ 5051 newspi = spmin; 5052 5053 } else { 5054 5055 /* init SPI */ 5056 newspi = 0; 5057 5058 /* when requesting to allocate spi ranged */ 5059 while (count--) { 5060 /* generate pseudo-random SPI value ranged. */ 5061 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5062 5063 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5064 break; 5065 } 5066 5067 if (count == 0 || newspi == 0) { 5068 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 5069 return 0; 5070 } 5071 } 5072 5073 /* statistics */ 5074 keystat.getspi_count = 5075 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5076 5077 return newspi; 5078 } 5079 5080 static int 5081 key_handle_natt_info(struct secasvar *sav, 5082 const struct sadb_msghdr *mhp) 5083 { 5084 5085 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5086 ipseclog((LOG_DEBUG,"update: NAT-T OAi present\n")); 5087 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5088 ipseclog((LOG_DEBUG,"update: NAT-T OAr present\n")); 5089 5090 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5091 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5092 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5093 struct sadb_x_nat_t_type *type; 5094 struct sadb_x_nat_t_port *sport; 5095 struct sadb_x_nat_t_port *dport; 5096 struct sadb_address *iaddr, *raddr; 5097 struct sadb_x_nat_t_frag *frag; 5098 5099 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5100 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5101 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5102 ipseclog((LOG_DEBUG, "key_update: " 5103 "invalid message.\n")); 5104 return -1; 5105 } 5106 5107 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 5108 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 5109 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5110 return -1; 5111 } 5112 5113 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 5114 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 5115 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5116 return -1; 5117 } 5118 5119 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 5120 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 5121 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5122 return -1; 5123 } 5124 5125 type = (struct sadb_x_nat_t_type *) 5126 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5127 sport = (struct sadb_x_nat_t_port *) 5128 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5129 dport = (struct sadb_x_nat_t_port *) 5130 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5131 iaddr = (struct sadb_address *) 5132 mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5133 raddr = (struct sadb_address *) 5134 mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5135 frag = (struct sadb_x_nat_t_frag *) 5136 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5137 5138 ipseclog((LOG_DEBUG, 5139 "key_update: type %d, sport = %d, dport = %d\n", 5140 type->sadb_x_nat_t_type_type, 5141 sport->sadb_x_nat_t_port_port, 5142 dport->sadb_x_nat_t_port_port)); 5143 5144 if (type) 5145 sav->natt_type = type->sadb_x_nat_t_type_type; 5146 if (sport) 5147 key_porttosaddr(&sav->sah->saidx.src, 5148 sport->sadb_x_nat_t_port_port); 5149 if (dport) 5150 key_porttosaddr(&sav->sah->saidx.dst, 5151 dport->sadb_x_nat_t_port_port); 5152 if (frag) 5153 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5154 else 5155 sav->esp_frag = IP_MAXPACKET; 5156 } 5157 5158 return 0; 5159 } 5160 5161 /* Just update the IPSEC_NAT_T ports if present */ 5162 static int 5163 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5164 const struct sadb_msghdr *mhp) 5165 { 5166 5167 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5168 ipseclog((LOG_DEBUG,"update: NAT-T OAi present\n")); 5169 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5170 ipseclog((LOG_DEBUG,"update: NAT-T OAr present\n")); 5171 5172 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5173 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5174 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5175 struct sadb_x_nat_t_type *type; 5176 struct sadb_x_nat_t_port *sport; 5177 struct sadb_x_nat_t_port *dport; 5178 5179 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5180 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5181 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5182 ipseclog((LOG_DEBUG, "key_update: " 5183 "invalid message.\n")); 5184 return -1; 5185 } 5186 5187 sport = (struct sadb_x_nat_t_port *) 5188 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5189 dport = (struct sadb_x_nat_t_port *) 5190 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5191 5192 if (sport) 5193 key_porttosaddr(src, 5194 sport->sadb_x_nat_t_port_port); 5195 if (dport) 5196 key_porttosaddr(dst, 5197 dport->sadb_x_nat_t_port_port); 5198 } 5199 5200 return 0; 5201 } 5202 5203 5204 /* 5205 * SADB_UPDATE processing 5206 * receive 5207 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5208 * key(AE), (identity(SD),) (sensitivity)> 5209 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5210 * and send 5211 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5212 * (identity(SD),) (sensitivity)> 5213 * to the ikmpd. 5214 * 5215 * m will always be freed. 5216 */ 5217 static int 5218 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5219 { 5220 struct sadb_sa *sa0; 5221 struct sadb_address *src0, *dst0; 5222 struct secasindex saidx; 5223 struct secashead *sah; 5224 struct secasvar *sav; 5225 u_int16_t proto; 5226 u_int8_t mode; 5227 u_int16_t reqid; 5228 int error; 5229 5230 /* sanity check */ 5231 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5232 panic("key_update: NULL pointer is passed"); 5233 5234 /* map satype to proto */ 5235 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5236 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 5237 return key_senderror(so, m, EINVAL); 5238 } 5239 5240 if (mhp->ext[SADB_EXT_SA] == NULL || 5241 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5242 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5243 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5244 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5245 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5246 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5247 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5248 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5249 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5250 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5251 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5252 return key_senderror(so, m, EINVAL); 5253 } 5254 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5255 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5256 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5257 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5258 return key_senderror(so, m, EINVAL); 5259 } 5260 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5261 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5262 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5263 } else { 5264 mode = IPSEC_MODE_ANY; 5265 reqid = 0; 5266 } 5267 /* XXX boundary checking for other extensions */ 5268 5269 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5270 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5271 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5272 5273 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5274 dst0 + 1, &saidx)) != 0) 5275 return key_senderror(so, m, EINVAL); 5276 5277 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5278 return key_senderror(so, m, EINVAL); 5279 5280 /* get a SA header */ 5281 if ((sah = key_getsah(&saidx)) == NULL) { 5282 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 5283 return key_senderror(so, m, ENOENT); 5284 } 5285 5286 /* set spidx if there */ 5287 /* XXX rewrite */ 5288 error = key_setident(sah, m, mhp); 5289 if (error) 5290 return key_senderror(so, m, error); 5291 5292 /* find a SA with sequence number. */ 5293 #ifdef IPSEC_DOSEQCHECK 5294 if (mhp->msg->sadb_msg_seq != 0 5295 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5296 ipseclog((LOG_DEBUG, 5297 "key_update: no larval SA with sequence %u exists.\n", 5298 mhp->msg->sadb_msg_seq)); 5299 return key_senderror(so, m, ENOENT); 5300 } 5301 #else 5302 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 5303 ipseclog((LOG_DEBUG, 5304 "key_update: no such a SA found (spi:%u)\n", 5305 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5306 return key_senderror(so, m, EINVAL); 5307 } 5308 #endif 5309 5310 /* validity check */ 5311 if (sav->sah->saidx.proto != proto) { 5312 ipseclog((LOG_DEBUG, 5313 "key_update: protocol mismatched (DB=%u param=%u)\n", 5314 sav->sah->saidx.proto, proto)); 5315 return key_senderror(so, m, EINVAL); 5316 } 5317 #ifdef IPSEC_DOSEQCHECK 5318 if (sav->spi != sa0->sadb_sa_spi) { 5319 ipseclog((LOG_DEBUG, 5320 "key_update: SPI mismatched (DB:%u param:%u)\n", 5321 (u_int32_t)ntohl(sav->spi), 5322 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5323 return key_senderror(so, m, EINVAL); 5324 } 5325 #endif 5326 if (sav->pid != mhp->msg->sadb_msg_pid) { 5327 ipseclog((LOG_DEBUG, 5328 "key_update: pid mismatched (DB:%u param:%u)\n", 5329 sav->pid, mhp->msg->sadb_msg_pid)); 5330 return key_senderror(so, m, EINVAL); 5331 } 5332 5333 /* copy sav values */ 5334 error = key_setsaval(sav, m, mhp); 5335 if (error) { 5336 KEY_FREESAV(&sav); 5337 return key_senderror(so, m, error); 5338 } 5339 5340 if ((error = key_handle_natt_info(sav,mhp)) != 0) 5341 return key_senderror(so, m, EINVAL); 5342 5343 /* check SA values to be mature. */ 5344 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5345 KEY_FREESAV(&sav); 5346 return key_senderror(so, m, 0); 5347 } 5348 5349 { 5350 struct mbuf *n; 5351 5352 /* set msg buf from mhp */ 5353 n = key_getmsgbuf_x1(m, mhp); 5354 if (n == NULL) { 5355 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5356 return key_senderror(so, m, ENOBUFS); 5357 } 5358 5359 m_freem(m); 5360 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5361 } 5362 } 5363 5364 /* 5365 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5366 * only called by key_update(). 5367 * OUT: 5368 * NULL : not found 5369 * others : found, pointer to a SA. 5370 */ 5371 #ifdef IPSEC_DOSEQCHECK 5372 static struct secasvar * 5373 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5374 { 5375 struct secasvar *sav; 5376 u_int state; 5377 5378 state = SADB_SASTATE_LARVAL; 5379 5380 /* search SAD with sequence number ? */ 5381 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5382 5383 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5384 5385 if (sav->seq == seq) { 5386 SA_ADDREF(sav); 5387 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5388 printf("DP %s cause refcnt++:%d SA:%p\n", 5389 __func__, sav->refcnt, sav)); 5390 return sav; 5391 } 5392 } 5393 5394 return NULL; 5395 } 5396 #endif 5397 5398 /* 5399 * SADB_ADD processing 5400 * add an entry to SA database, when received 5401 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5402 * key(AE), (identity(SD),) (sensitivity)> 5403 * from the ikmpd, 5404 * and send 5405 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5406 * (identity(SD),) (sensitivity)> 5407 * to the ikmpd. 5408 * 5409 * IGNORE identity and sensitivity messages. 5410 * 5411 * m will always be freed. 5412 */ 5413 static int 5414 key_add(struct socket *so, struct mbuf *m, 5415 const struct sadb_msghdr *mhp) 5416 { 5417 struct sadb_sa *sa0; 5418 struct sadb_address *src0, *dst0; 5419 struct secasindex saidx; 5420 struct secashead *newsah; 5421 struct secasvar *newsav; 5422 u_int16_t proto; 5423 u_int8_t mode; 5424 u_int16_t reqid; 5425 int error; 5426 5427 /* sanity check */ 5428 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5429 panic("key_add: NULL pointer is passed"); 5430 5431 /* map satype to proto */ 5432 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5433 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5434 return key_senderror(so, m, EINVAL); 5435 } 5436 5437 if (mhp->ext[SADB_EXT_SA] == NULL || 5438 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5439 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5440 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5441 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5442 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5443 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5444 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5445 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5446 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5447 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5448 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5449 return key_senderror(so, m, EINVAL); 5450 } 5451 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5452 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5453 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5454 /* XXX need more */ 5455 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5456 return key_senderror(so, m, EINVAL); 5457 } 5458 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5459 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5460 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5461 } else { 5462 mode = IPSEC_MODE_ANY; 5463 reqid = 0; 5464 } 5465 5466 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5467 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5468 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5469 5470 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5471 dst0 + 1, &saidx)) != 0) 5472 return key_senderror(so, m, EINVAL); 5473 5474 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5475 return key_senderror(so, m, EINVAL); 5476 5477 /* get a SA header */ 5478 if ((newsah = key_getsah(&saidx)) == NULL) { 5479 /* create a new SA header */ 5480 if ((newsah = key_newsah(&saidx)) == NULL) { 5481 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5482 return key_senderror(so, m, ENOBUFS); 5483 } 5484 } 5485 5486 /* set spidx if there */ 5487 /* XXX rewrite */ 5488 error = key_setident(newsah, m, mhp); 5489 if (error) { 5490 return key_senderror(so, m, error); 5491 } 5492 5493 /* create new SA entry. */ 5494 /* We can create new SA only if SPI is differenct. */ 5495 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5496 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5497 return key_senderror(so, m, EEXIST); 5498 } 5499 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5500 if (newsav == NULL) { 5501 return key_senderror(so, m, error); 5502 } 5503 5504 if ((error = key_handle_natt_info(newsav, mhp)) != 0) 5505 return key_senderror(so, m, EINVAL); 5506 5507 /* check SA values to be mature. */ 5508 if ((error = key_mature(newsav)) != 0) { 5509 KEY_FREESAV(&newsav); 5510 return key_senderror(so, m, error); 5511 } 5512 5513 /* 5514 * don't call key_freesav() here, as we would like to keep the SA 5515 * in the database on success. 5516 */ 5517 5518 { 5519 struct mbuf *n; 5520 5521 /* set msg buf from mhp */ 5522 n = key_getmsgbuf_x1(m, mhp); 5523 if (n == NULL) { 5524 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5525 return key_senderror(so, m, ENOBUFS); 5526 } 5527 5528 m_freem(m); 5529 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5530 } 5531 } 5532 5533 /* m is retained */ 5534 static int 5535 key_setident(struct secashead *sah, struct mbuf *m, 5536 const struct sadb_msghdr *mhp) 5537 { 5538 const struct sadb_ident *idsrc, *iddst; 5539 int idsrclen, iddstlen; 5540 5541 /* sanity check */ 5542 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5543 panic("key_setident: NULL pointer is passed"); 5544 5545 /* don't make buffer if not there */ 5546 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5547 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5548 sah->idents = NULL; 5549 sah->identd = NULL; 5550 return 0; 5551 } 5552 5553 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5554 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5555 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5556 return EINVAL; 5557 } 5558 5559 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5560 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5561 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5562 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5563 5564 /* validity check */ 5565 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5566 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5567 return EINVAL; 5568 } 5569 5570 switch (idsrc->sadb_ident_type) { 5571 case SADB_IDENTTYPE_PREFIX: 5572 case SADB_IDENTTYPE_FQDN: 5573 case SADB_IDENTTYPE_USERFQDN: 5574 default: 5575 /* XXX do nothing */ 5576 sah->idents = NULL; 5577 sah->identd = NULL; 5578 return 0; 5579 } 5580 5581 /* make structure */ 5582 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5583 if (sah->idents == NULL) { 5584 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5585 return ENOBUFS; 5586 } 5587 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5588 if (sah->identd == NULL) { 5589 KFREE(sah->idents); 5590 sah->idents = NULL; 5591 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5592 return ENOBUFS; 5593 } 5594 memcpy(sah->idents, idsrc, idsrclen); 5595 memcpy(sah->identd, iddst, iddstlen); 5596 5597 return 0; 5598 } 5599 5600 /* 5601 * m will not be freed on return. 5602 * it is caller's responsibility to free the result. 5603 */ 5604 static struct mbuf * 5605 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5606 { 5607 struct mbuf *n; 5608 5609 /* sanity check */ 5610 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5611 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5612 5613 /* create new sadb_msg to reply. */ 5614 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5615 SADB_EXT_SA, SADB_X_EXT_SA2, 5616 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5617 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5618 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5619 if (!n) 5620 return NULL; 5621 5622 if (n->m_len < sizeof(struct sadb_msg)) { 5623 n = m_pullup(n, sizeof(struct sadb_msg)); 5624 if (n == NULL) 5625 return NULL; 5626 } 5627 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5628 mtod(n, struct sadb_msg *)->sadb_msg_len = 5629 PFKEY_UNIT64(n->m_pkthdr.len); 5630 5631 return n; 5632 } 5633 5634 static int key_delete_all (struct socket *, struct mbuf *, 5635 const struct sadb_msghdr *, u_int16_t); 5636 5637 /* 5638 * SADB_DELETE processing 5639 * receive 5640 * <base, SA(*), address(SD)> 5641 * from the ikmpd, and set SADB_SASTATE_DEAD, 5642 * and send, 5643 * <base, SA(*), address(SD)> 5644 * to the ikmpd. 5645 * 5646 * m will always be freed. 5647 */ 5648 static int 5649 key_delete(struct socket *so, struct mbuf *m, 5650 const struct sadb_msghdr *mhp) 5651 { 5652 struct sadb_sa *sa0; 5653 struct sadb_address *src0, *dst0; 5654 struct secasindex saidx; 5655 struct secashead *sah; 5656 struct secasvar *sav = NULL; 5657 u_int16_t proto; 5658 int error; 5659 5660 /* sanity check */ 5661 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5662 panic("key_delete: NULL pointer is passed"); 5663 5664 /* map satype to proto */ 5665 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5666 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5667 return key_senderror(so, m, EINVAL); 5668 } 5669 5670 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5671 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5672 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5673 return key_senderror(so, m, EINVAL); 5674 } 5675 5676 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5677 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5678 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5679 return key_senderror(so, m, EINVAL); 5680 } 5681 5682 if (mhp->ext[SADB_EXT_SA] == NULL) { 5683 /* 5684 * Caller wants us to delete all non-LARVAL SAs 5685 * that match the src/dst. This is used during 5686 * IKE INITIAL-CONTACT. 5687 */ 5688 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5689 return key_delete_all(so, m, mhp, proto); 5690 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5691 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5692 return key_senderror(so, m, EINVAL); 5693 } 5694 5695 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5696 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5697 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5698 5699 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5700 dst0 + 1, &saidx)) != 0) 5701 return key_senderror(so, m, EINVAL); 5702 5703 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5704 return key_senderror(so, m, EINVAL); 5705 5706 /* get a SA header */ 5707 LIST_FOREACH(sah, &sahtree, chain) { 5708 if (sah->state == SADB_SASTATE_DEAD) 5709 continue; 5710 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5711 continue; 5712 5713 /* get a SA with SPI. */ 5714 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5715 if (sav) 5716 break; 5717 } 5718 if (sah == NULL) { 5719 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5720 return key_senderror(so, m, ENOENT); 5721 } 5722 5723 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5724 KEY_FREESAV(&sav); 5725 5726 { 5727 struct mbuf *n; 5728 struct sadb_msg *newmsg; 5729 5730 /* create new sadb_msg to reply. */ 5731 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5732 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5733 if (!n) 5734 return key_senderror(so, m, ENOBUFS); 5735 5736 if (n->m_len < sizeof(struct sadb_msg)) { 5737 n = m_pullup(n, sizeof(struct sadb_msg)); 5738 if (n == NULL) 5739 return key_senderror(so, m, ENOBUFS); 5740 } 5741 newmsg = mtod(n, struct sadb_msg *); 5742 newmsg->sadb_msg_errno = 0; 5743 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5744 5745 m_freem(m); 5746 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5747 } 5748 } 5749 5750 /* 5751 * delete all SAs for src/dst. Called from key_delete(). 5752 */ 5753 static int 5754 key_delete_all(struct socket *so, struct mbuf *m, 5755 const struct sadb_msghdr *mhp, u_int16_t proto) 5756 { 5757 struct sadb_address *src0, *dst0; 5758 struct secasindex saidx; 5759 struct secashead *sah; 5760 struct secasvar *sav, *nextsav; 5761 u_int stateidx, state; 5762 int error; 5763 5764 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5765 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5766 5767 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5768 dst0 + 1, &saidx)) != 0) 5769 return key_senderror(so, m, EINVAL); 5770 5771 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5772 return key_senderror(so, m, EINVAL); 5773 5774 LIST_FOREACH(sah, &sahtree, chain) { 5775 if (sah->state == SADB_SASTATE_DEAD) 5776 continue; 5777 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5778 continue; 5779 5780 /* Delete all non-LARVAL SAs. */ 5781 for (stateidx = 0; 5782 stateidx < _ARRAYLEN(saorder_state_alive); 5783 stateidx++) { 5784 state = saorder_state_alive[stateidx]; 5785 if (state == SADB_SASTATE_LARVAL) 5786 continue; 5787 for (sav = LIST_FIRST(&sah->savtree[state]); 5788 sav != NULL; sav = nextsav) { 5789 nextsav = LIST_NEXT(sav, chain); 5790 /* sanity check */ 5791 if (sav->state != state) { 5792 ipseclog((LOG_DEBUG, "key_delete_all: " 5793 "invalid sav->state " 5794 "(queue: %d SA: %d)\n", 5795 state, sav->state)); 5796 continue; 5797 } 5798 5799 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5800 KEY_FREESAV(&sav); 5801 } 5802 } 5803 } 5804 { 5805 struct mbuf *n; 5806 struct sadb_msg *newmsg; 5807 5808 /* create new sadb_msg to reply. */ 5809 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5810 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5811 if (!n) 5812 return key_senderror(so, m, ENOBUFS); 5813 5814 if (n->m_len < sizeof(struct sadb_msg)) { 5815 n = m_pullup(n, sizeof(struct sadb_msg)); 5816 if (n == NULL) 5817 return key_senderror(so, m, ENOBUFS); 5818 } 5819 newmsg = mtod(n, struct sadb_msg *); 5820 newmsg->sadb_msg_errno = 0; 5821 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5822 5823 m_freem(m); 5824 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5825 } 5826 } 5827 5828 /* 5829 * SADB_GET processing 5830 * receive 5831 * <base, SA(*), address(SD)> 5832 * from the ikmpd, and get a SP and a SA to respond, 5833 * and send, 5834 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5835 * (identity(SD),) (sensitivity)> 5836 * to the ikmpd. 5837 * 5838 * m will always be freed. 5839 */ 5840 static int 5841 key_get(struct socket *so, struct mbuf *m, 5842 const struct sadb_msghdr *mhp) 5843 { 5844 struct sadb_sa *sa0; 5845 struct sadb_address *src0, *dst0; 5846 struct secasindex saidx; 5847 struct secashead *sah; 5848 struct secasvar *sav = NULL; 5849 u_int16_t proto; 5850 int error; 5851 5852 /* sanity check */ 5853 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5854 panic("key_get: NULL pointer is passed"); 5855 5856 /* map satype to proto */ 5857 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5858 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5859 return key_senderror(so, m, EINVAL); 5860 } 5861 5862 if (mhp->ext[SADB_EXT_SA] == NULL || 5863 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5864 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5865 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5866 return key_senderror(so, m, EINVAL); 5867 } 5868 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5869 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5870 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5871 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5872 return key_senderror(so, m, EINVAL); 5873 } 5874 5875 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5876 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5877 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5878 5879 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5880 dst0 + 1, &saidx)) != 0) 5881 return key_senderror(so, m, EINVAL); 5882 5883 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5884 return key_senderror(so, m, EINVAL); 5885 5886 /* get a SA header */ 5887 LIST_FOREACH(sah, &sahtree, chain) { 5888 if (sah->state == SADB_SASTATE_DEAD) 5889 continue; 5890 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5891 continue; 5892 5893 /* get a SA with SPI. */ 5894 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5895 if (sav) 5896 break; 5897 } 5898 if (sah == NULL) { 5899 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5900 return key_senderror(so, m, ENOENT); 5901 } 5902 5903 { 5904 struct mbuf *n; 5905 u_int8_t satype; 5906 5907 /* map proto to satype */ 5908 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5909 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5910 return key_senderror(so, m, EINVAL); 5911 } 5912 5913 /* create new sadb_msg to reply. */ 5914 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5915 mhp->msg->sadb_msg_pid); 5916 if (!n) 5917 return key_senderror(so, m, ENOBUFS); 5918 5919 m_freem(m); 5920 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5921 } 5922 } 5923 5924 /* XXX make it sysctl-configurable? */ 5925 static void 5926 key_getcomb_setlifetime(struct sadb_comb *comb) 5927 { 5928 5929 comb->sadb_comb_soft_allocations = 1; 5930 comb->sadb_comb_hard_allocations = 1; 5931 comb->sadb_comb_soft_bytes = 0; 5932 comb->sadb_comb_hard_bytes = 0; 5933 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5934 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5935 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5936 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5937 } 5938 5939 /* 5940 * XXX reorder combinations by preference 5941 * XXX no idea if the user wants ESP authentication or not 5942 */ 5943 static struct mbuf * 5944 key_getcomb_esp(void) 5945 { 5946 struct sadb_comb *comb; 5947 const struct enc_xform *algo; 5948 struct mbuf *result = NULL, *m, *n; 5949 int encmin; 5950 int i, off, o; 5951 int totlen; 5952 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5953 5954 m = NULL; 5955 for (i = 1; i <= SADB_EALG_MAX; i++) { 5956 algo = esp_algorithm_lookup(i); 5957 if (algo == NULL) 5958 continue; 5959 5960 /* discard algorithms with key size smaller than system min */ 5961 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5962 continue; 5963 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5964 encmin = ipsec_esp_keymin; 5965 else 5966 encmin = _BITS(algo->minkey); 5967 5968 if (ipsec_esp_auth) 5969 m = key_getcomb_ah(); 5970 else { 5971 IPSEC_ASSERT(l <= MLEN, 5972 ("key_getcomb_esp: l=%u > MLEN=%lu", 5973 l, (u_long) MLEN)); 5974 MGET(m, M_DONTWAIT, MT_DATA); 5975 if (m) { 5976 M_ALIGN(m, l); 5977 m->m_len = l; 5978 m->m_next = NULL; 5979 memset(mtod(m, void *), 0, m->m_len); 5980 } 5981 } 5982 if (!m) 5983 goto fail; 5984 5985 totlen = 0; 5986 for (n = m; n; n = n->m_next) 5987 totlen += n->m_len; 5988 IPSEC_ASSERT((totlen % l) == 0, 5989 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 5990 5991 for (off = 0; off < totlen; off += l) { 5992 n = m_pulldown(m, off, l, &o); 5993 if (!n) { 5994 /* m is already freed */ 5995 goto fail; 5996 } 5997 comb = (struct sadb_comb *)(mtod(n, char *) + o); 5998 memset(comb, 0, sizeof(*comb)); 5999 key_getcomb_setlifetime(comb); 6000 comb->sadb_comb_encrypt = i; 6001 comb->sadb_comb_encrypt_minbits = encmin; 6002 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6003 } 6004 6005 if (!result) 6006 result = m; 6007 else 6008 m_cat(result, m); 6009 } 6010 6011 return result; 6012 6013 fail: 6014 if (result) 6015 m_freem(result); 6016 return NULL; 6017 } 6018 6019 static void 6020 key_getsizes_ah(const struct auth_hash *ah, int alg, 6021 u_int16_t* ksmin, u_int16_t* ksmax) 6022 { 6023 *ksmin = *ksmax = ah->keysize; 6024 if (ah->keysize == 0) { 6025 /* 6026 * Transform takes arbitrary key size but algorithm 6027 * key size is restricted. Enforce this here. 6028 */ 6029 switch (alg) { 6030 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6031 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6032 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 6033 default: 6034 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 6035 alg)); 6036 break; 6037 } 6038 } 6039 } 6040 6041 /* 6042 * XXX reorder combinations by preference 6043 */ 6044 static struct mbuf * 6045 key_getcomb_ah(void) 6046 { 6047 struct sadb_comb *comb; 6048 const struct auth_hash *algo; 6049 struct mbuf *m; 6050 u_int16_t minkeysize, maxkeysize; 6051 int i; 6052 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6053 6054 m = NULL; 6055 for (i = 1; i <= SADB_AALG_MAX; i++) { 6056 #if 1 6057 /* we prefer HMAC algorithms, not old algorithms */ 6058 if (i != SADB_AALG_SHA1HMAC && 6059 i != SADB_AALG_MD5HMAC && 6060 i != SADB_X_AALG_SHA2_256 && 6061 i != SADB_X_AALG_SHA2_384 && 6062 i != SADB_X_AALG_SHA2_512) 6063 continue; 6064 #endif 6065 algo = ah_algorithm_lookup(i); 6066 if (!algo) 6067 continue; 6068 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6069 /* discard algorithms with key size smaller than system min */ 6070 if (_BITS(minkeysize) < ipsec_ah_keymin) 6071 continue; 6072 6073 if (!m) { 6074 IPSEC_ASSERT(l <= MLEN, 6075 ("key_getcomb_ah: l=%u > MLEN=%lu", 6076 l, (u_long) MLEN)); 6077 MGET(m, M_DONTWAIT, MT_DATA); 6078 if (m) { 6079 M_ALIGN(m, l); 6080 m->m_len = l; 6081 m->m_next = NULL; 6082 } 6083 } else 6084 M_PREPEND(m, l, M_DONTWAIT); 6085 if (!m) 6086 return NULL; 6087 6088 comb = mtod(m, struct sadb_comb *); 6089 memset(comb, 0, sizeof(*comb)); 6090 key_getcomb_setlifetime(comb); 6091 comb->sadb_comb_auth = i; 6092 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6093 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6094 } 6095 6096 return m; 6097 } 6098 6099 /* 6100 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6101 * XXX reorder combinations by preference 6102 */ 6103 static struct mbuf * 6104 key_getcomb_ipcomp(void) 6105 { 6106 struct sadb_comb *comb; 6107 const struct comp_algo *algo; 6108 struct mbuf *m; 6109 int i; 6110 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6111 6112 m = NULL; 6113 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6114 algo = ipcomp_algorithm_lookup(i); 6115 if (!algo) 6116 continue; 6117 6118 if (!m) { 6119 IPSEC_ASSERT(l <= MLEN, 6120 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 6121 l, (u_long) MLEN)); 6122 MGET(m, M_DONTWAIT, MT_DATA); 6123 if (m) { 6124 M_ALIGN(m, l); 6125 m->m_len = l; 6126 m->m_next = NULL; 6127 } 6128 } else 6129 M_PREPEND(m, l, M_DONTWAIT); 6130 if (!m) 6131 return NULL; 6132 6133 comb = mtod(m, struct sadb_comb *); 6134 memset(comb, 0, sizeof(*comb)); 6135 key_getcomb_setlifetime(comb); 6136 comb->sadb_comb_encrypt = i; 6137 /* what should we set into sadb_comb_*_{min,max}bits? */ 6138 } 6139 6140 return m; 6141 } 6142 6143 /* 6144 * XXX no way to pass mode (transport/tunnel) to userland 6145 * XXX replay checking? 6146 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6147 */ 6148 static struct mbuf * 6149 key_getprop(const struct secasindex *saidx) 6150 { 6151 struct sadb_prop *prop; 6152 struct mbuf *m, *n; 6153 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6154 int totlen; 6155 6156 switch (saidx->proto) { 6157 case IPPROTO_ESP: 6158 m = key_getcomb_esp(); 6159 break; 6160 case IPPROTO_AH: 6161 m = key_getcomb_ah(); 6162 break; 6163 case IPPROTO_IPCOMP: 6164 m = key_getcomb_ipcomp(); 6165 break; 6166 default: 6167 return NULL; 6168 } 6169 6170 if (!m) 6171 return NULL; 6172 M_PREPEND(m, l, M_DONTWAIT); 6173 if (!m) 6174 return NULL; 6175 6176 totlen = 0; 6177 for (n = m; n; n = n->m_next) 6178 totlen += n->m_len; 6179 6180 prop = mtod(m, struct sadb_prop *); 6181 memset(prop, 0, sizeof(*prop)); 6182 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6183 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6184 prop->sadb_prop_replay = 32; /* XXX */ 6185 6186 return m; 6187 } 6188 6189 /* 6190 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6191 * send 6192 * <base, SA, address(SD), (address(P)), x_policy, 6193 * (identity(SD),) (sensitivity,) proposal> 6194 * to KMD, and expect to receive 6195 * <base> with SADB_ACQUIRE if error occurred, 6196 * or 6197 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6198 * from KMD by PF_KEY. 6199 * 6200 * XXX x_policy is outside of RFC2367 (KAME extension). 6201 * XXX sensitivity is not supported. 6202 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6203 * see comment for key_getcomb_ipcomp(). 6204 * 6205 * OUT: 6206 * 0 : succeed 6207 * others: error number 6208 */ 6209 static int 6210 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6211 { 6212 struct mbuf *result = NULL, *m; 6213 #ifndef IPSEC_NONBLOCK_ACQUIRE 6214 struct secacq *newacq; 6215 #endif 6216 u_int8_t satype; 6217 int error = -1; 6218 u_int32_t seq; 6219 6220 /* sanity check */ 6221 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 6222 satype = key_proto2satype(saidx->proto); 6223 IPSEC_ASSERT(satype != 0, 6224 ("key_acquire: null satype, protocol %u", saidx->proto)); 6225 6226 #ifndef IPSEC_NONBLOCK_ACQUIRE 6227 /* 6228 * We never do anything about acquirng SA. There is anather 6229 * solution that kernel blocks to send SADB_ACQUIRE message until 6230 * getting something message from IKEd. In later case, to be 6231 * managed with ACQUIRING list. 6232 */ 6233 /* Get an entry to check whether sending message or not. */ 6234 if ((newacq = key_getacq(saidx)) != NULL) { 6235 if (key_blockacq_count < newacq->count) { 6236 /* reset counter and do send message. */ 6237 newacq->count = 0; 6238 } else { 6239 /* increment counter and do nothing. */ 6240 newacq->count++; 6241 return 0; 6242 } 6243 } else { 6244 /* make new entry for blocking to send SADB_ACQUIRE. */ 6245 if ((newacq = key_newacq(saidx)) == NULL) 6246 return ENOBUFS; 6247 6248 /* add to acqtree */ 6249 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6250 } 6251 #endif 6252 6253 6254 #ifndef IPSEC_NONBLOCK_ACQUIRE 6255 seq = newacq->seq; 6256 #else 6257 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6258 #endif 6259 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6260 if (!m) { 6261 error = ENOBUFS; 6262 goto fail; 6263 } 6264 result = m; 6265 6266 /* set sadb_address for saidx's. */ 6267 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6268 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6269 if (!m) { 6270 error = ENOBUFS; 6271 goto fail; 6272 } 6273 m_cat(result, m); 6274 6275 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6276 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6277 if (!m) { 6278 error = ENOBUFS; 6279 goto fail; 6280 } 6281 m_cat(result, m); 6282 6283 /* XXX proxy address (optional) */ 6284 6285 /* set sadb_x_policy */ 6286 if (sp) { 6287 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6288 if (!m) { 6289 error = ENOBUFS; 6290 goto fail; 6291 } 6292 m_cat(result, m); 6293 } 6294 6295 /* XXX identity (optional) */ 6296 #if 0 6297 if (idexttype && fqdn) { 6298 /* create identity extension (FQDN) */ 6299 struct sadb_ident *id; 6300 int fqdnlen; 6301 6302 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6303 id = (struct sadb_ident *)p; 6304 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6305 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6306 id->sadb_ident_exttype = idexttype; 6307 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6308 memcpy(id + 1, fqdn, fqdnlen); 6309 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6310 } 6311 6312 if (idexttype) { 6313 /* create identity extension (USERFQDN) */ 6314 struct sadb_ident *id; 6315 int userfqdnlen; 6316 6317 if (userfqdn) { 6318 /* +1 for terminating-NUL */ 6319 userfqdnlen = strlen(userfqdn) + 1; 6320 } else 6321 userfqdnlen = 0; 6322 id = (struct sadb_ident *)p; 6323 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6324 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6325 id->sadb_ident_exttype = idexttype; 6326 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6327 /* XXX is it correct? */ 6328 if (curlwp) 6329 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6330 if (userfqdn && userfqdnlen) 6331 memcpy(id + 1, userfqdn, userfqdnlen); 6332 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6333 } 6334 #endif 6335 6336 /* XXX sensitivity (optional) */ 6337 6338 /* create proposal/combination extension */ 6339 m = key_getprop(saidx); 6340 #if 0 6341 /* 6342 * spec conformant: always attach proposal/combination extension, 6343 * the problem is that we have no way to attach it for ipcomp, 6344 * due to the way sadb_comb is declared in RFC2367. 6345 */ 6346 if (!m) { 6347 error = ENOBUFS; 6348 goto fail; 6349 } 6350 m_cat(result, m); 6351 #else 6352 /* 6353 * outside of spec; make proposal/combination extension optional. 6354 */ 6355 if (m) 6356 m_cat(result, m); 6357 #endif 6358 6359 if ((result->m_flags & M_PKTHDR) == 0) { 6360 error = EINVAL; 6361 goto fail; 6362 } 6363 6364 if (result->m_len < sizeof(struct sadb_msg)) { 6365 result = m_pullup(result, sizeof(struct sadb_msg)); 6366 if (result == NULL) { 6367 error = ENOBUFS; 6368 goto fail; 6369 } 6370 } 6371 6372 result->m_pkthdr.len = 0; 6373 for (m = result; m; m = m->m_next) 6374 result->m_pkthdr.len += m->m_len; 6375 6376 mtod(result, struct sadb_msg *)->sadb_msg_len = 6377 PFKEY_UNIT64(result->m_pkthdr.len); 6378 6379 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6380 6381 fail: 6382 if (result) 6383 m_freem(result); 6384 return error; 6385 } 6386 6387 #ifndef IPSEC_NONBLOCK_ACQUIRE 6388 static struct secacq * 6389 key_newacq(const struct secasindex *saidx) 6390 { 6391 struct secacq *newacq; 6392 6393 /* get new entry */ 6394 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6395 if (newacq == NULL) { 6396 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6397 return NULL; 6398 } 6399 memset(newacq, 0, sizeof(*newacq)); 6400 6401 /* copy secindex */ 6402 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6403 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6404 newacq->created = time_uptime; 6405 newacq->count = 0; 6406 6407 return newacq; 6408 } 6409 6410 static struct secacq * 6411 key_getacq(const struct secasindex *saidx) 6412 { 6413 struct secacq *acq; 6414 6415 LIST_FOREACH(acq, &acqtree, chain) { 6416 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6417 return acq; 6418 } 6419 6420 return NULL; 6421 } 6422 6423 static struct secacq * 6424 key_getacqbyseq(u_int32_t seq) 6425 { 6426 struct secacq *acq; 6427 6428 LIST_FOREACH(acq, &acqtree, chain) { 6429 if (acq->seq == seq) 6430 return acq; 6431 } 6432 6433 return NULL; 6434 } 6435 #endif 6436 6437 static struct secspacq * 6438 key_newspacq(const struct secpolicyindex *spidx) 6439 { 6440 struct secspacq *acq; 6441 6442 /* get new entry */ 6443 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6444 if (acq == NULL) { 6445 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6446 return NULL; 6447 } 6448 memset(acq, 0, sizeof(*acq)); 6449 6450 /* copy secindex */ 6451 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6452 acq->created = time_uptime; 6453 acq->count = 0; 6454 6455 return acq; 6456 } 6457 6458 static struct secspacq * 6459 key_getspacq(const struct secpolicyindex *spidx) 6460 { 6461 struct secspacq *acq; 6462 6463 LIST_FOREACH(acq, &spacqtree, chain) { 6464 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6465 return acq; 6466 } 6467 6468 return NULL; 6469 } 6470 6471 /* 6472 * SADB_ACQUIRE processing, 6473 * in first situation, is receiving 6474 * <base> 6475 * from the ikmpd, and clear sequence of its secasvar entry. 6476 * 6477 * In second situation, is receiving 6478 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6479 * from a user land process, and return 6480 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6481 * to the socket. 6482 * 6483 * m will always be freed. 6484 */ 6485 static int 6486 key_acquire2(struct socket *so, struct mbuf *m, 6487 const struct sadb_msghdr *mhp) 6488 { 6489 const struct sadb_address *src0, *dst0; 6490 struct secasindex saidx; 6491 struct secashead *sah; 6492 u_int16_t proto; 6493 int error; 6494 6495 /* sanity check */ 6496 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6497 panic("key_acquire2: NULL pointer is passed"); 6498 6499 /* 6500 * Error message from KMd. 6501 * We assume that if error was occurred in IKEd, the length of PFKEY 6502 * message is equal to the size of sadb_msg structure. 6503 * We do not raise error even if error occurred in this function. 6504 */ 6505 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6506 #ifndef IPSEC_NONBLOCK_ACQUIRE 6507 struct secacq *acq; 6508 6509 /* check sequence number */ 6510 if (mhp->msg->sadb_msg_seq == 0) { 6511 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6512 m_freem(m); 6513 return 0; 6514 } 6515 6516 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6517 /* 6518 * the specified larval SA is already gone, or we got 6519 * a bogus sequence number. we can silently ignore it. 6520 */ 6521 m_freem(m); 6522 return 0; 6523 } 6524 6525 /* reset acq counter in order to deletion by timehander. */ 6526 acq->created = time_uptime; 6527 acq->count = 0; 6528 #endif 6529 m_freem(m); 6530 return 0; 6531 } 6532 6533 /* 6534 * This message is from user land. 6535 */ 6536 6537 /* map satype to proto */ 6538 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6539 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6540 return key_senderror(so, m, EINVAL); 6541 } 6542 6543 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6544 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6545 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6546 /* error */ 6547 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6548 return key_senderror(so, m, EINVAL); 6549 } 6550 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6551 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6552 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6553 /* error */ 6554 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6555 return key_senderror(so, m, EINVAL); 6556 } 6557 6558 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6559 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6560 6561 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 6562 dst0 + 1, &saidx)) != 0) 6563 return key_senderror(so, m, EINVAL); 6564 6565 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 6566 return key_senderror(so, m, EINVAL); 6567 6568 /* get a SA index */ 6569 LIST_FOREACH(sah, &sahtree, chain) { 6570 if (sah->state == SADB_SASTATE_DEAD) 6571 continue; 6572 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6573 break; 6574 } 6575 if (sah != NULL) { 6576 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6577 return key_senderror(so, m, EEXIST); 6578 } 6579 6580 error = key_acquire(&saidx, NULL); 6581 if (error != 0) { 6582 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6583 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6584 return key_senderror(so, m, error); 6585 } 6586 6587 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6588 } 6589 6590 /* 6591 * SADB_REGISTER processing. 6592 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6593 * receive 6594 * <base> 6595 * from the ikmpd, and register a socket to send PF_KEY messages, 6596 * and send 6597 * <base, supported> 6598 * to KMD by PF_KEY. 6599 * If socket is detached, must free from regnode. 6600 * 6601 * m will always be freed. 6602 */ 6603 static int 6604 key_register(struct socket *so, struct mbuf *m, 6605 const struct sadb_msghdr *mhp) 6606 { 6607 struct secreg *reg, *newreg = 0; 6608 6609 /* sanity check */ 6610 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6611 panic("key_register: NULL pointer is passed"); 6612 6613 /* check for invalid register message */ 6614 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6615 return key_senderror(so, m, EINVAL); 6616 6617 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6618 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6619 goto setmsg; 6620 6621 /* check whether existing or not */ 6622 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6623 if (reg->so == so) { 6624 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6625 return key_senderror(so, m, EEXIST); 6626 } 6627 } 6628 6629 /* create regnode */ 6630 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6631 if (newreg == NULL) { 6632 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6633 return key_senderror(so, m, ENOBUFS); 6634 } 6635 memset(newreg, 0, sizeof(*newreg)); 6636 6637 newreg->so = so; 6638 ((struct keycb *)sotorawcb(so))->kp_registered++; 6639 6640 /* add regnode to regtree. */ 6641 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6642 6643 setmsg: 6644 { 6645 struct mbuf *n; 6646 struct sadb_msg *newmsg; 6647 struct sadb_supported *sup; 6648 u_int len, alen, elen; 6649 int off; 6650 int i; 6651 struct sadb_alg *alg; 6652 6653 /* create new sadb_msg to reply. */ 6654 alen = 0; 6655 for (i = 1; i <= SADB_AALG_MAX; i++) { 6656 if (ah_algorithm_lookup(i)) 6657 alen += sizeof(struct sadb_alg); 6658 } 6659 if (alen) 6660 alen += sizeof(struct sadb_supported); 6661 elen = 0; 6662 for (i = 1; i <= SADB_EALG_MAX; i++) { 6663 if (esp_algorithm_lookup(i)) 6664 elen += sizeof(struct sadb_alg); 6665 } 6666 if (elen) 6667 elen += sizeof(struct sadb_supported); 6668 6669 len = sizeof(struct sadb_msg) + alen + elen; 6670 6671 if (len > MCLBYTES) 6672 return key_senderror(so, m, ENOBUFS); 6673 6674 MGETHDR(n, M_DONTWAIT, MT_DATA); 6675 if (len > MHLEN) { 6676 MCLGET(n, M_DONTWAIT); 6677 if ((n->m_flags & M_EXT) == 0) { 6678 m_freem(n); 6679 n = NULL; 6680 } 6681 } 6682 if (!n) 6683 return key_senderror(so, m, ENOBUFS); 6684 6685 n->m_pkthdr.len = n->m_len = len; 6686 n->m_next = NULL; 6687 off = 0; 6688 6689 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6690 newmsg = mtod(n, struct sadb_msg *); 6691 newmsg->sadb_msg_errno = 0; 6692 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6693 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6694 6695 /* for authentication algorithm */ 6696 if (alen) { 6697 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6698 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6699 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6700 off += PFKEY_ALIGN8(sizeof(*sup)); 6701 6702 for (i = 1; i <= SADB_AALG_MAX; i++) { 6703 const struct auth_hash *aalgo; 6704 u_int16_t minkeysize, maxkeysize; 6705 6706 aalgo = ah_algorithm_lookup(i); 6707 if (!aalgo) 6708 continue; 6709 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6710 alg->sadb_alg_id = i; 6711 alg->sadb_alg_ivlen = 0; 6712 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6713 alg->sadb_alg_minbits = _BITS(minkeysize); 6714 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6715 off += PFKEY_ALIGN8(sizeof(*alg)); 6716 } 6717 } 6718 6719 /* for encryption algorithm */ 6720 if (elen) { 6721 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6722 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6723 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6724 off += PFKEY_ALIGN8(sizeof(*sup)); 6725 6726 for (i = 1; i <= SADB_EALG_MAX; i++) { 6727 const struct enc_xform *ealgo; 6728 6729 ealgo = esp_algorithm_lookup(i); 6730 if (!ealgo) 6731 continue; 6732 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6733 alg->sadb_alg_id = i; 6734 alg->sadb_alg_ivlen = ealgo->blocksize; 6735 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6736 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6737 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6738 } 6739 } 6740 6741 #ifdef DIAGNOSTIC 6742 if (off != len) 6743 panic("length assumption failed in key_register"); 6744 #endif 6745 6746 m_freem(m); 6747 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6748 } 6749 } 6750 6751 /* 6752 * free secreg entry registered. 6753 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6754 */ 6755 void 6756 key_freereg(struct socket *so) 6757 { 6758 struct secreg *reg; 6759 int i; 6760 6761 /* sanity check */ 6762 if (so == NULL) 6763 panic("key_freereg: NULL pointer is passed"); 6764 6765 /* 6766 * check whether existing or not. 6767 * check all type of SA, because there is a potential that 6768 * one socket is registered to multiple type of SA. 6769 */ 6770 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6771 LIST_FOREACH(reg, ®tree[i], chain) { 6772 if (reg->so == so 6773 && __LIST_CHAINED(reg)) { 6774 LIST_REMOVE(reg, chain); 6775 KFREE(reg); 6776 break; 6777 } 6778 } 6779 } 6780 6781 return; 6782 } 6783 6784 /* 6785 * SADB_EXPIRE processing 6786 * send 6787 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6788 * to KMD by PF_KEY. 6789 * NOTE: We send only soft lifetime extension. 6790 * 6791 * OUT: 0 : succeed 6792 * others : error number 6793 */ 6794 static int 6795 key_expire(struct secasvar *sav) 6796 { 6797 int s; 6798 int satype; 6799 struct mbuf *result = NULL, *m; 6800 int len; 6801 int error = -1; 6802 struct sadb_lifetime *lt; 6803 6804 /* XXX: Why do we lock ? */ 6805 s = splsoftnet(); /*called from softclock()*/ 6806 6807 /* sanity check */ 6808 if (sav == NULL) 6809 panic("key_expire: NULL pointer is passed"); 6810 if (sav->sah == NULL) 6811 panic("key_expire: Why was SA index in SA NULL"); 6812 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6813 panic("key_expire: invalid proto is passed"); 6814 6815 /* set msg header */ 6816 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6817 if (!m) { 6818 error = ENOBUFS; 6819 goto fail; 6820 } 6821 result = m; 6822 6823 /* create SA extension */ 6824 m = key_setsadbsa(sav); 6825 if (!m) { 6826 error = ENOBUFS; 6827 goto fail; 6828 } 6829 m_cat(result, m); 6830 6831 /* create SA extension */ 6832 m = key_setsadbxsa2(sav->sah->saidx.mode, 6833 sav->replay ? sav->replay->count : 0, 6834 sav->sah->saidx.reqid); 6835 if (!m) { 6836 error = ENOBUFS; 6837 goto fail; 6838 } 6839 m_cat(result, m); 6840 6841 /* create lifetime extension (current and soft) */ 6842 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6843 m = key_alloc_mbuf(len); 6844 if (!m || m->m_next) { /*XXX*/ 6845 if (m) 6846 m_freem(m); 6847 error = ENOBUFS; 6848 goto fail; 6849 } 6850 memset(mtod(m, void *), 0, len); 6851 lt = mtod(m, struct sadb_lifetime *); 6852 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6853 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6854 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6855 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6856 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime 6857 + time_second - time_uptime; 6858 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime 6859 + time_second - time_uptime; 6860 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6861 memcpy(lt, sav->lft_s, sizeof(*lt)); 6862 m_cat(result, m); 6863 6864 /* set sadb_address for source */ 6865 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6866 &sav->sah->saidx.src.sa, 6867 FULLMASK, IPSEC_ULPROTO_ANY); 6868 if (!m) { 6869 error = ENOBUFS; 6870 goto fail; 6871 } 6872 m_cat(result, m); 6873 6874 /* set sadb_address for destination */ 6875 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6876 &sav->sah->saidx.dst.sa, 6877 FULLMASK, IPSEC_ULPROTO_ANY); 6878 if (!m) { 6879 error = ENOBUFS; 6880 goto fail; 6881 } 6882 m_cat(result, m); 6883 6884 if ((result->m_flags & M_PKTHDR) == 0) { 6885 error = EINVAL; 6886 goto fail; 6887 } 6888 6889 if (result->m_len < sizeof(struct sadb_msg)) { 6890 result = m_pullup(result, sizeof(struct sadb_msg)); 6891 if (result == NULL) { 6892 error = ENOBUFS; 6893 goto fail; 6894 } 6895 } 6896 6897 result->m_pkthdr.len = 0; 6898 for (m = result; m; m = m->m_next) 6899 result->m_pkthdr.len += m->m_len; 6900 6901 mtod(result, struct sadb_msg *)->sadb_msg_len = 6902 PFKEY_UNIT64(result->m_pkthdr.len); 6903 6904 splx(s); 6905 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6906 6907 fail: 6908 if (result) 6909 m_freem(result); 6910 splx(s); 6911 return error; 6912 } 6913 6914 /* 6915 * SADB_FLUSH processing 6916 * receive 6917 * <base> 6918 * from the ikmpd, and free all entries in secastree. 6919 * and send, 6920 * <base> 6921 * to the ikmpd. 6922 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6923 * 6924 * m will always be freed. 6925 */ 6926 static int 6927 key_flush(struct socket *so, struct mbuf *m, 6928 const struct sadb_msghdr *mhp) 6929 { 6930 struct sadb_msg *newmsg; 6931 struct secashead *sah, *nextsah; 6932 struct secasvar *sav, *nextsav; 6933 u_int16_t proto; 6934 u_int8_t state; 6935 u_int stateidx; 6936 6937 /* sanity check */ 6938 if (so == NULL || mhp == NULL || mhp->msg == NULL) 6939 panic("key_flush: NULL pointer is passed"); 6940 6941 /* map satype to proto */ 6942 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6943 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6944 return key_senderror(so, m, EINVAL); 6945 } 6946 6947 /* no SATYPE specified, i.e. flushing all SA. */ 6948 for (sah = LIST_FIRST(&sahtree); 6949 sah != NULL; 6950 sah = nextsah) { 6951 nextsah = LIST_NEXT(sah, chain); 6952 6953 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6954 && proto != sah->saidx.proto) 6955 continue; 6956 6957 for (stateidx = 0; 6958 stateidx < _ARRAYLEN(saorder_state_alive); 6959 stateidx++) { 6960 state = saorder_state_any[stateidx]; 6961 for (sav = LIST_FIRST(&sah->savtree[state]); 6962 sav != NULL; 6963 sav = nextsav) { 6964 6965 nextsav = LIST_NEXT(sav, chain); 6966 6967 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6968 KEY_FREESAV(&sav); 6969 } 6970 } 6971 6972 sah->state = SADB_SASTATE_DEAD; 6973 } 6974 6975 if (m->m_len < sizeof(struct sadb_msg) || 6976 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6977 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 6978 return key_senderror(so, m, ENOBUFS); 6979 } 6980 6981 if (m->m_next) 6982 m_freem(m->m_next); 6983 m->m_next = NULL; 6984 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6985 newmsg = mtod(m, struct sadb_msg *); 6986 newmsg->sadb_msg_errno = 0; 6987 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6988 6989 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6990 } 6991 6992 6993 static struct mbuf * 6994 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6995 { 6996 struct secashead *sah; 6997 struct secasvar *sav; 6998 u_int16_t proto; 6999 u_int stateidx; 7000 u_int8_t satype; 7001 u_int8_t state; 7002 int cnt; 7003 struct mbuf *m, *n, *prev; 7004 7005 *lenp = 0; 7006 7007 /* map satype to proto */ 7008 if ((proto = key_satype2proto(req_satype)) == 0) { 7009 *errorp = EINVAL; 7010 return (NULL); 7011 } 7012 7013 /* count sav entries to be sent to userland. */ 7014 cnt = 0; 7015 LIST_FOREACH(sah, &sahtree, chain) { 7016 if (req_satype != SADB_SATYPE_UNSPEC && 7017 proto != sah->saidx.proto) 7018 continue; 7019 7020 for (stateidx = 0; 7021 stateidx < _ARRAYLEN(saorder_state_any); 7022 stateidx++) { 7023 state = saorder_state_any[stateidx]; 7024 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7025 cnt++; 7026 } 7027 } 7028 } 7029 7030 if (cnt == 0) { 7031 *errorp = ENOENT; 7032 return (NULL); 7033 } 7034 7035 /* send this to the userland, one at a time. */ 7036 m = NULL; 7037 prev = m; 7038 LIST_FOREACH(sah, &sahtree, chain) { 7039 if (req_satype != SADB_SATYPE_UNSPEC && 7040 proto != sah->saidx.proto) 7041 continue; 7042 7043 /* map proto to satype */ 7044 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7045 m_freem(m); 7046 *errorp = EINVAL; 7047 return (NULL); 7048 } 7049 7050 for (stateidx = 0; 7051 stateidx < _ARRAYLEN(saorder_state_any); 7052 stateidx++) { 7053 state = saorder_state_any[stateidx]; 7054 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7055 n = key_setdumpsa(sav, SADB_DUMP, satype, 7056 --cnt, pid); 7057 if (!n) { 7058 m_freem(m); 7059 *errorp = ENOBUFS; 7060 return (NULL); 7061 } 7062 7063 if (!m) 7064 m = n; 7065 else 7066 prev->m_nextpkt = n; 7067 prev = n; 7068 } 7069 } 7070 } 7071 7072 if (!m) { 7073 *errorp = EINVAL; 7074 return (NULL); 7075 } 7076 7077 if ((m->m_flags & M_PKTHDR) != 0) { 7078 m->m_pkthdr.len = 0; 7079 for (n = m; n; n = n->m_next) 7080 m->m_pkthdr.len += n->m_len; 7081 } 7082 7083 *errorp = 0; 7084 return (m); 7085 } 7086 7087 /* 7088 * SADB_DUMP processing 7089 * dump all entries including status of DEAD in SAD. 7090 * receive 7091 * <base> 7092 * from the ikmpd, and dump all secasvar leaves 7093 * and send, 7094 * <base> ..... 7095 * to the ikmpd. 7096 * 7097 * m will always be freed. 7098 */ 7099 static int 7100 key_dump(struct socket *so, struct mbuf *m0, 7101 const struct sadb_msghdr *mhp) 7102 { 7103 u_int16_t proto; 7104 u_int8_t satype; 7105 struct mbuf *n; 7106 int s; 7107 int error, len, ok; 7108 7109 /* sanity check */ 7110 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 7111 panic("key_dump: NULL pointer is passed"); 7112 7113 /* map satype to proto */ 7114 satype = mhp->msg->sadb_msg_satype; 7115 if ((proto = key_satype2proto(satype)) == 0) { 7116 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 7117 return key_senderror(so, m0, EINVAL); 7118 } 7119 7120 /* 7121 * If the requestor has insufficient socket-buffer space 7122 * for the entire chain, nobody gets any response to the DUMP. 7123 * XXX For now, only the requestor ever gets anything. 7124 * Moreover, if the requestor has any space at all, they receive 7125 * the entire chain, otherwise the request is refused with ENOBUFS. 7126 */ 7127 if (sbspace(&so->so_rcv) <= 0) { 7128 return key_senderror(so, m0, ENOBUFS); 7129 } 7130 7131 s = splsoftnet(); 7132 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7133 splx(s); 7134 7135 if (n == NULL) { 7136 return key_senderror(so, m0, ENOENT); 7137 } 7138 { 7139 uint64_t *ps = PFKEY_STAT_GETREF(); 7140 ps[PFKEY_STAT_IN_TOTAL]++; 7141 ps[PFKEY_STAT_IN_BYTES] += len; 7142 PFKEY_STAT_PUTREF(); 7143 } 7144 7145 /* 7146 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7147 * The requestor receives either the entire chain, or an 7148 * error message with ENOBUFS. 7149 * 7150 * sbappendaddrchain() takes the chain of entries, one 7151 * packet-record per SPD entry, prepends the key_src sockaddr 7152 * to each packet-record, links the sockaddr mbufs into a new 7153 * list of records, then appends the entire resulting 7154 * list to the requesting socket. 7155 */ 7156 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 7157 n, SB_PRIO_ONESHOT_OVERFLOW); 7158 7159 if (!ok) { 7160 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7161 m_freem(n); 7162 return key_senderror(so, m0, ENOBUFS); 7163 } 7164 7165 m_freem(m0); 7166 return 0; 7167 } 7168 7169 /* 7170 * SADB_X_PROMISC processing 7171 * 7172 * m will always be freed. 7173 */ 7174 static int 7175 key_promisc(struct socket *so, struct mbuf *m, 7176 const struct sadb_msghdr *mhp) 7177 { 7178 int olen; 7179 7180 /* sanity check */ 7181 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 7182 panic("key_promisc: NULL pointer is passed"); 7183 7184 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7185 7186 if (olen < sizeof(struct sadb_msg)) { 7187 #if 1 7188 return key_senderror(so, m, EINVAL); 7189 #else 7190 m_freem(m); 7191 return 0; 7192 #endif 7193 } else if (olen == sizeof(struct sadb_msg)) { 7194 /* enable/disable promisc mode */ 7195 struct keycb *kp; 7196 7197 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7198 return key_senderror(so, m, EINVAL); 7199 mhp->msg->sadb_msg_errno = 0; 7200 switch (mhp->msg->sadb_msg_satype) { 7201 case 0: 7202 case 1: 7203 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7204 break; 7205 default: 7206 return key_senderror(so, m, EINVAL); 7207 } 7208 7209 /* send the original message back to everyone */ 7210 mhp->msg->sadb_msg_errno = 0; 7211 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7212 } else { 7213 /* send packet as is */ 7214 7215 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7216 7217 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7218 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7219 } 7220 } 7221 7222 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7223 const struct sadb_msghdr *) = { 7224 NULL, /* SADB_RESERVED */ 7225 key_getspi, /* SADB_GETSPI */ 7226 key_update, /* SADB_UPDATE */ 7227 key_add, /* SADB_ADD */ 7228 key_delete, /* SADB_DELETE */ 7229 key_get, /* SADB_GET */ 7230 key_acquire2, /* SADB_ACQUIRE */ 7231 key_register, /* SADB_REGISTER */ 7232 NULL, /* SADB_EXPIRE */ 7233 key_flush, /* SADB_FLUSH */ 7234 key_dump, /* SADB_DUMP */ 7235 key_promisc, /* SADB_X_PROMISC */ 7236 NULL, /* SADB_X_PCHANGE */ 7237 key_spdadd, /* SADB_X_SPDUPDATE */ 7238 key_spdadd, /* SADB_X_SPDADD */ 7239 key_spddelete, /* SADB_X_SPDDELETE */ 7240 key_spdget, /* SADB_X_SPDGET */ 7241 NULL, /* SADB_X_SPDACQUIRE */ 7242 key_spddump, /* SADB_X_SPDDUMP */ 7243 key_spdflush, /* SADB_X_SPDFLUSH */ 7244 key_spdadd, /* SADB_X_SPDSETIDX */ 7245 NULL, /* SADB_X_SPDEXPIRE */ 7246 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7247 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7248 }; 7249 7250 /* 7251 * parse sadb_msg buffer to process PFKEYv2, 7252 * and create a data to response if needed. 7253 * I think to be dealed with mbuf directly. 7254 * IN: 7255 * msgp : pointer to pointer to a received buffer pulluped. 7256 * This is rewrited to response. 7257 * so : pointer to socket. 7258 * OUT: 7259 * length for buffer to send to user process. 7260 */ 7261 int 7262 key_parse(struct mbuf *m, struct socket *so) 7263 { 7264 struct sadb_msg *msg; 7265 struct sadb_msghdr mh; 7266 int error; 7267 int target; 7268 7269 /* sanity check */ 7270 if (m == NULL || so == NULL) 7271 panic("key_parse: NULL pointer is passed"); 7272 7273 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7274 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7275 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 7276 kdebug_sadb(msg)); 7277 #endif 7278 7279 if (m->m_len < sizeof(struct sadb_msg)) { 7280 m = m_pullup(m, sizeof(struct sadb_msg)); 7281 if (!m) 7282 return ENOBUFS; 7283 } 7284 msg = mtod(m, struct sadb_msg *); 7285 target = KEY_SENDUP_ONE; 7286 7287 if ((m->m_flags & M_PKTHDR) == 0 || 7288 m->m_pkthdr.len != m->m_pkthdr.len) { 7289 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 7290 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7291 error = EINVAL; 7292 goto senderror; 7293 } 7294 7295 if (msg->sadb_msg_version != PF_KEY_V2) { 7296 ipseclog((LOG_DEBUG, 7297 "key_parse: PF_KEY version %u is mismatched.\n", 7298 msg->sadb_msg_version)); 7299 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7300 error = EINVAL; 7301 goto senderror; 7302 } 7303 7304 if (msg->sadb_msg_type > SADB_MAX) { 7305 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7306 msg->sadb_msg_type)); 7307 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7308 error = EINVAL; 7309 goto senderror; 7310 } 7311 7312 /* for old-fashioned code - should be nuked */ 7313 if (m->m_pkthdr.len > MCLBYTES) { 7314 m_freem(m); 7315 return ENOBUFS; 7316 } 7317 if (m->m_next) { 7318 struct mbuf *n; 7319 7320 MGETHDR(n, M_DONTWAIT, MT_DATA); 7321 if (n && m->m_pkthdr.len > MHLEN) { 7322 MCLGET(n, M_DONTWAIT); 7323 if ((n->m_flags & M_EXT) == 0) { 7324 m_free(n); 7325 n = NULL; 7326 } 7327 } 7328 if (!n) { 7329 m_freem(m); 7330 return ENOBUFS; 7331 } 7332 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7333 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7334 n->m_next = NULL; 7335 m_freem(m); 7336 m = n; 7337 } 7338 7339 /* align the mbuf chain so that extensions are in contiguous region. */ 7340 error = key_align(m, &mh); 7341 if (error) 7342 return error; 7343 7344 if (m->m_next) { /*XXX*/ 7345 m_freem(m); 7346 return ENOBUFS; 7347 } 7348 7349 msg = mh.msg; 7350 7351 /* check SA type */ 7352 switch (msg->sadb_msg_satype) { 7353 case SADB_SATYPE_UNSPEC: 7354 switch (msg->sadb_msg_type) { 7355 case SADB_GETSPI: 7356 case SADB_UPDATE: 7357 case SADB_ADD: 7358 case SADB_DELETE: 7359 case SADB_GET: 7360 case SADB_ACQUIRE: 7361 case SADB_EXPIRE: 7362 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7363 "when msg type=%u.\n", msg->sadb_msg_type)); 7364 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7365 error = EINVAL; 7366 goto senderror; 7367 } 7368 break; 7369 case SADB_SATYPE_AH: 7370 case SADB_SATYPE_ESP: 7371 case SADB_X_SATYPE_IPCOMP: 7372 case SADB_X_SATYPE_TCPSIGNATURE: 7373 switch (msg->sadb_msg_type) { 7374 case SADB_X_SPDADD: 7375 case SADB_X_SPDDELETE: 7376 case SADB_X_SPDGET: 7377 case SADB_X_SPDDUMP: 7378 case SADB_X_SPDFLUSH: 7379 case SADB_X_SPDSETIDX: 7380 case SADB_X_SPDUPDATE: 7381 case SADB_X_SPDDELETE2: 7382 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7383 msg->sadb_msg_type)); 7384 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7385 error = EINVAL; 7386 goto senderror; 7387 } 7388 break; 7389 case SADB_SATYPE_RSVP: 7390 case SADB_SATYPE_OSPFV2: 7391 case SADB_SATYPE_RIPV2: 7392 case SADB_SATYPE_MIP: 7393 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7394 msg->sadb_msg_satype)); 7395 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7396 error = EOPNOTSUPP; 7397 goto senderror; 7398 case 1: /* XXX: What does it do? */ 7399 if (msg->sadb_msg_type == SADB_X_PROMISC) 7400 break; 7401 /*FALLTHROUGH*/ 7402 default: 7403 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7404 msg->sadb_msg_satype)); 7405 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7406 error = EINVAL; 7407 goto senderror; 7408 } 7409 7410 /* check field of upper layer protocol and address family */ 7411 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7412 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7413 struct sadb_address *src0, *dst0; 7414 u_int plen; 7415 7416 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7417 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7418 7419 /* check upper layer protocol */ 7420 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7421 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7422 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7423 error = EINVAL; 7424 goto senderror; 7425 } 7426 7427 /* check family */ 7428 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7429 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7430 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7431 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7432 error = EINVAL; 7433 goto senderror; 7434 } 7435 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7436 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7437 ipseclog((LOG_DEBUG, 7438 "key_parse: address struct size mismatched.\n")); 7439 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7440 error = EINVAL; 7441 goto senderror; 7442 } 7443 7444 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7445 case AF_INET: 7446 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7447 sizeof(struct sockaddr_in)) { 7448 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7449 error = EINVAL; 7450 goto senderror; 7451 } 7452 break; 7453 case AF_INET6: 7454 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7455 sizeof(struct sockaddr_in6)) { 7456 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7457 error = EINVAL; 7458 goto senderror; 7459 } 7460 break; 7461 default: 7462 ipseclog((LOG_DEBUG, 7463 "key_parse: unsupported address family.\n")); 7464 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7465 error = EAFNOSUPPORT; 7466 goto senderror; 7467 } 7468 7469 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7470 case AF_INET: 7471 plen = sizeof(struct in_addr) << 3; 7472 break; 7473 case AF_INET6: 7474 plen = sizeof(struct in6_addr) << 3; 7475 break; 7476 default: 7477 plen = 0; /*fool gcc*/ 7478 break; 7479 } 7480 7481 /* check max prefix length */ 7482 if (src0->sadb_address_prefixlen > plen || 7483 dst0->sadb_address_prefixlen > plen) { 7484 ipseclog((LOG_DEBUG, 7485 "key_parse: illegal prefixlen.\n")); 7486 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7487 error = EINVAL; 7488 goto senderror; 7489 } 7490 7491 /* 7492 * prefixlen == 0 is valid because there can be a case when 7493 * all addresses are matched. 7494 */ 7495 } 7496 7497 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7498 key_typesw[msg->sadb_msg_type] == NULL) { 7499 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7500 error = EINVAL; 7501 goto senderror; 7502 } 7503 7504 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7505 7506 senderror: 7507 msg->sadb_msg_errno = error; 7508 return key_sendup_mbuf(so, m, target); 7509 } 7510 7511 static int 7512 key_senderror(struct socket *so, struct mbuf *m, int code) 7513 { 7514 struct sadb_msg *msg; 7515 7516 if (m->m_len < sizeof(struct sadb_msg)) 7517 panic("invalid mbuf passed to key_senderror"); 7518 7519 msg = mtod(m, struct sadb_msg *); 7520 msg->sadb_msg_errno = code; 7521 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7522 } 7523 7524 /* 7525 * set the pointer to each header into message buffer. 7526 * m will be freed on error. 7527 * XXX larger-than-MCLBYTES extension? 7528 */ 7529 static int 7530 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7531 { 7532 struct mbuf *n; 7533 struct sadb_ext *ext; 7534 size_t off, end; 7535 int extlen; 7536 int toff; 7537 7538 /* sanity check */ 7539 if (m == NULL || mhp == NULL) 7540 panic("key_align: NULL pointer is passed"); 7541 if (m->m_len < sizeof(struct sadb_msg)) 7542 panic("invalid mbuf passed to key_align"); 7543 7544 /* initialize */ 7545 memset(mhp, 0, sizeof(*mhp)); 7546 7547 mhp->msg = mtod(m, struct sadb_msg *); 7548 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7549 7550 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7551 extlen = end; /*just in case extlen is not updated*/ 7552 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7553 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7554 if (!n) { 7555 /* m is already freed */ 7556 return ENOBUFS; 7557 } 7558 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7559 7560 /* set pointer */ 7561 switch (ext->sadb_ext_type) { 7562 case SADB_EXT_SA: 7563 case SADB_EXT_ADDRESS_SRC: 7564 case SADB_EXT_ADDRESS_DST: 7565 case SADB_EXT_ADDRESS_PROXY: 7566 case SADB_EXT_LIFETIME_CURRENT: 7567 case SADB_EXT_LIFETIME_HARD: 7568 case SADB_EXT_LIFETIME_SOFT: 7569 case SADB_EXT_KEY_AUTH: 7570 case SADB_EXT_KEY_ENCRYPT: 7571 case SADB_EXT_IDENTITY_SRC: 7572 case SADB_EXT_IDENTITY_DST: 7573 case SADB_EXT_SENSITIVITY: 7574 case SADB_EXT_PROPOSAL: 7575 case SADB_EXT_SUPPORTED_AUTH: 7576 case SADB_EXT_SUPPORTED_ENCRYPT: 7577 case SADB_EXT_SPIRANGE: 7578 case SADB_X_EXT_POLICY: 7579 case SADB_X_EXT_SA2: 7580 case SADB_X_EXT_NAT_T_TYPE: 7581 case SADB_X_EXT_NAT_T_SPORT: 7582 case SADB_X_EXT_NAT_T_DPORT: 7583 case SADB_X_EXT_NAT_T_OAI: 7584 case SADB_X_EXT_NAT_T_OAR: 7585 case SADB_X_EXT_NAT_T_FRAG: 7586 /* duplicate check */ 7587 /* 7588 * XXX Are there duplication payloads of either 7589 * KEY_AUTH or KEY_ENCRYPT ? 7590 */ 7591 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7592 ipseclog((LOG_DEBUG, 7593 "key_align: duplicate ext_type %u " 7594 "is passed.\n", ext->sadb_ext_type)); 7595 m_freem(m); 7596 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7597 return EINVAL; 7598 } 7599 break; 7600 default: 7601 ipseclog((LOG_DEBUG, 7602 "key_align: invalid ext_type %u is passed.\n", 7603 ext->sadb_ext_type)); 7604 m_freem(m); 7605 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7606 return EINVAL; 7607 } 7608 7609 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7610 7611 if (key_validate_ext(ext, extlen)) { 7612 m_freem(m); 7613 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7614 return EINVAL; 7615 } 7616 7617 n = m_pulldown(m, off, extlen, &toff); 7618 if (!n) { 7619 /* m is already freed */ 7620 return ENOBUFS; 7621 } 7622 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7623 7624 mhp->ext[ext->sadb_ext_type] = ext; 7625 mhp->extoff[ext->sadb_ext_type] = off; 7626 mhp->extlen[ext->sadb_ext_type] = extlen; 7627 } 7628 7629 if (off != end) { 7630 m_freem(m); 7631 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7632 return EINVAL; 7633 } 7634 7635 return 0; 7636 } 7637 7638 static int 7639 key_validate_ext(const struct sadb_ext *ext, int len) 7640 { 7641 const struct sockaddr *sa; 7642 enum { NONE, ADDR } checktype = NONE; 7643 int baselen = 0; 7644 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7645 7646 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7647 return EINVAL; 7648 7649 /* if it does not match minimum/maximum length, bail */ 7650 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7651 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7652 return EINVAL; 7653 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7654 return EINVAL; 7655 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7656 return EINVAL; 7657 7658 /* more checks based on sadb_ext_type XXX need more */ 7659 switch (ext->sadb_ext_type) { 7660 case SADB_EXT_ADDRESS_SRC: 7661 case SADB_EXT_ADDRESS_DST: 7662 case SADB_EXT_ADDRESS_PROXY: 7663 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7664 checktype = ADDR; 7665 break; 7666 case SADB_EXT_IDENTITY_SRC: 7667 case SADB_EXT_IDENTITY_DST: 7668 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7669 SADB_X_IDENTTYPE_ADDR) { 7670 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7671 checktype = ADDR; 7672 } else 7673 checktype = NONE; 7674 break; 7675 default: 7676 checktype = NONE; 7677 break; 7678 } 7679 7680 switch (checktype) { 7681 case NONE: 7682 break; 7683 case ADDR: 7684 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7685 if (len < baselen + sal) 7686 return EINVAL; 7687 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7688 return EINVAL; 7689 break; 7690 } 7691 7692 return 0; 7693 } 7694 7695 static int 7696 key_do_init(void) 7697 { 7698 int i; 7699 7700 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7701 7702 callout_init(&key_timehandler_ch, 0); 7703 7704 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7705 LIST_INIT(&sptree[i]); 7706 } 7707 7708 LIST_INIT(&sahtree); 7709 7710 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7711 LIST_INIT(®tree[i]); 7712 } 7713 7714 #ifndef IPSEC_NONBLOCK_ACQUIRE 7715 LIST_INIT(&acqtree); 7716 #endif 7717 LIST_INIT(&spacqtree); 7718 7719 /* system default */ 7720 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7721 ip4_def_policy.refcnt++; /*never reclaim this*/ 7722 7723 #ifdef INET6 7724 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7725 ip6_def_policy.refcnt++; /*never reclaim this*/ 7726 #endif 7727 7728 7729 #ifndef IPSEC_DEBUG2 7730 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7731 #endif /*IPSEC_DEBUG2*/ 7732 7733 /* initialize key statistics */ 7734 keystat.getspi_count = 1; 7735 7736 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7737 7738 return (0); 7739 } 7740 7741 void 7742 key_init(void) 7743 { 7744 static ONCE_DECL(key_init_once); 7745 7746 RUN_ONCE(&key_init_once, key_do_init); 7747 } 7748 7749 /* 7750 * XXX: maybe This function is called after INBOUND IPsec processing. 7751 * 7752 * Special check for tunnel-mode packets. 7753 * We must make some checks for consistency between inner and outer IP header. 7754 * 7755 * xxx more checks to be provided 7756 */ 7757 int 7758 key_checktunnelsanity( 7759 struct secasvar *sav, 7760 u_int family, 7761 void *src, 7762 void *dst 7763 ) 7764 { 7765 /* sanity check */ 7766 if (sav->sah == NULL) 7767 panic("sav->sah == NULL at key_checktunnelsanity"); 7768 7769 /* XXX: check inner IP header */ 7770 7771 return 1; 7772 } 7773 7774 #if 0 7775 #define hostnamelen strlen(hostname) 7776 7777 /* 7778 * Get FQDN for the host. 7779 * If the administrator configured hostname (by hostname(1)) without 7780 * domain name, returns nothing. 7781 */ 7782 static const char * 7783 key_getfqdn(void) 7784 { 7785 int i; 7786 int hasdot; 7787 static char fqdn[MAXHOSTNAMELEN + 1]; 7788 7789 if (!hostnamelen) 7790 return NULL; 7791 7792 /* check if it comes with domain name. */ 7793 hasdot = 0; 7794 for (i = 0; i < hostnamelen; i++) { 7795 if (hostname[i] == '.') 7796 hasdot++; 7797 } 7798 if (!hasdot) 7799 return NULL; 7800 7801 /* NOTE: hostname may not be NUL-terminated. */ 7802 memset(fqdn, 0, sizeof(fqdn)); 7803 memcpy(fqdn, hostname, hostnamelen); 7804 fqdn[hostnamelen] = '\0'; 7805 return fqdn; 7806 } 7807 7808 /* 7809 * get username@FQDN for the host/user. 7810 */ 7811 static const char * 7812 key_getuserfqdn(void) 7813 { 7814 const char *host; 7815 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7816 struct proc *p = curproc; 7817 char *q; 7818 7819 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7820 return NULL; 7821 if (!(host = key_getfqdn())) 7822 return NULL; 7823 7824 /* NOTE: s_login may not be-NUL terminated. */ 7825 memset(userfqdn, 0, sizeof(userfqdn)); 7826 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7827 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7828 q = userfqdn + strlen(userfqdn); 7829 *q++ = '@'; 7830 memcpy(q, host, strlen(host)); 7831 q += strlen(host); 7832 *q++ = '\0'; 7833 7834 return userfqdn; 7835 } 7836 #endif 7837 7838 /* record data transfer on SA, and update timestamps */ 7839 void 7840 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7841 { 7842 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7843 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7844 if (!sav->lft_c) 7845 return; 7846 7847 /* 7848 * XXX Currently, there is a difference of bytes size 7849 * between inbound and outbound processing. 7850 */ 7851 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7852 /* to check bytes lifetime is done in key_timehandler(). */ 7853 7854 /* 7855 * We use the number of packets as the unit of 7856 * sadb_lifetime_allocations. We increment the variable 7857 * whenever {esp,ah}_{in,out}put is called. 7858 */ 7859 sav->lft_c->sadb_lifetime_allocations++; 7860 /* XXX check for expires? */ 7861 7862 /* 7863 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7864 * in seconds. HARD and SOFT lifetime are measured by the time 7865 * difference (again in seconds) from sadb_lifetime_usetime. 7866 * 7867 * usetime 7868 * v expire expire 7869 * -----+-----+--------+---> t 7870 * <--------------> HARD 7871 * <-----> SOFT 7872 */ 7873 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7874 /* XXX check for expires? */ 7875 7876 return; 7877 } 7878 7879 /* dumb version */ 7880 void 7881 key_sa_routechange(struct sockaddr *dst) 7882 { 7883 struct secashead *sah; 7884 struct route *ro; 7885 const struct sockaddr *sa; 7886 7887 LIST_FOREACH(sah, &sahtree, chain) { 7888 ro = &sah->sa_route; 7889 sa = rtcache_getdst(ro); 7890 if (sa != NULL && dst->sa_len == sa->sa_len && 7891 memcmp(dst, sa, dst->sa_len) == 0) 7892 rtcache_free(ro); 7893 } 7894 7895 return; 7896 } 7897 7898 static void 7899 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7900 { 7901 if (sav == NULL) 7902 panic("key_sa_chgstate called with sav == NULL"); 7903 7904 if (sav->state == state) 7905 return; 7906 7907 if (__LIST_CHAINED(sav)) 7908 LIST_REMOVE(sav, chain); 7909 7910 sav->state = state; 7911 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7912 } 7913 7914 /* XXX too much? */ 7915 static struct mbuf * 7916 key_alloc_mbuf(int l) 7917 { 7918 struct mbuf *m = NULL, *n; 7919 int len, t; 7920 7921 len = l; 7922 while (len > 0) { 7923 MGET(n, M_DONTWAIT, MT_DATA); 7924 if (n && len > MLEN) 7925 MCLGET(n, M_DONTWAIT); 7926 if (!n) { 7927 m_freem(m); 7928 return NULL; 7929 } 7930 7931 n->m_next = NULL; 7932 n->m_len = 0; 7933 n->m_len = M_TRAILINGSPACE(n); 7934 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7935 if (n->m_len > len) { 7936 t = (n->m_len - len) & ~(sizeof(long) - 1); 7937 n->m_data += t; 7938 n->m_len = len; 7939 } 7940 7941 len -= n->m_len; 7942 7943 if (m) 7944 m_cat(m, n); 7945 else 7946 m = n; 7947 } 7948 7949 return m; 7950 } 7951 7952 static struct mbuf * 7953 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7954 { 7955 struct secashead *sah; 7956 struct secasvar *sav; 7957 u_int16_t proto; 7958 u_int stateidx; 7959 u_int8_t satype; 7960 u_int8_t state; 7961 int cnt; 7962 struct mbuf *m, *n; 7963 7964 /* map satype to proto */ 7965 if ((proto = key_satype2proto(req_satype)) == 0) { 7966 *errorp = EINVAL; 7967 return (NULL); 7968 } 7969 7970 /* count sav entries to be sent to the userland. */ 7971 cnt = 0; 7972 LIST_FOREACH(sah, &sahtree, chain) { 7973 if (req_satype != SADB_SATYPE_UNSPEC && 7974 proto != sah->saidx.proto) 7975 continue; 7976 7977 for (stateidx = 0; 7978 stateidx < _ARRAYLEN(saorder_state_any); 7979 stateidx++) { 7980 state = saorder_state_any[stateidx]; 7981 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7982 cnt++; 7983 } 7984 } 7985 } 7986 7987 if (cnt == 0) { 7988 *errorp = ENOENT; 7989 return (NULL); 7990 } 7991 7992 /* send this to the userland, one at a time. */ 7993 m = NULL; 7994 LIST_FOREACH(sah, &sahtree, chain) { 7995 if (req_satype != SADB_SATYPE_UNSPEC && 7996 proto != sah->saidx.proto) 7997 continue; 7998 7999 /* map proto to satype */ 8000 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 8001 m_freem(m); 8002 *errorp = EINVAL; 8003 return (NULL); 8004 } 8005 8006 for (stateidx = 0; 8007 stateidx < _ARRAYLEN(saorder_state_any); 8008 stateidx++) { 8009 state = saorder_state_any[stateidx]; 8010 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8011 n = key_setdumpsa(sav, SADB_DUMP, satype, 8012 --cnt, pid); 8013 if (!n) { 8014 m_freem(m); 8015 *errorp = ENOBUFS; 8016 return (NULL); 8017 } 8018 8019 if (!m) 8020 m = n; 8021 else 8022 m_cat(m, n); 8023 } 8024 } 8025 } 8026 8027 if (!m) { 8028 *errorp = EINVAL; 8029 return (NULL); 8030 } 8031 8032 if ((m->m_flags & M_PKTHDR) != 0) { 8033 m->m_pkthdr.len = 0; 8034 for (n = m; n; n = n->m_next) 8035 m->m_pkthdr.len += n->m_len; 8036 } 8037 8038 *errorp = 0; 8039 return (m); 8040 } 8041 8042 static struct mbuf * 8043 key_setspddump(int *errorp, pid_t pid) 8044 { 8045 struct secpolicy *sp; 8046 int cnt; 8047 u_int dir; 8048 struct mbuf *m, *n; 8049 8050 /* search SPD entry and get buffer size. */ 8051 cnt = 0; 8052 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8053 LIST_FOREACH(sp, &sptree[dir], chain) { 8054 cnt++; 8055 } 8056 } 8057 8058 if (cnt == 0) { 8059 *errorp = ENOENT; 8060 return (NULL); 8061 } 8062 8063 m = NULL; 8064 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8065 LIST_FOREACH(sp, &sptree[dir], chain) { 8066 --cnt; 8067 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8068 8069 if (!n) { 8070 *errorp = ENOBUFS; 8071 m_freem(m); 8072 return (NULL); 8073 } 8074 if (!m) 8075 m = n; 8076 else { 8077 m->m_pkthdr.len += n->m_pkthdr.len; 8078 m_cat(m, n); 8079 } 8080 } 8081 } 8082 8083 *errorp = 0; 8084 return (m); 8085 } 8086 8087 int 8088 key_get_used(void) { 8089 return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || 8090 !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); 8091 } 8092 8093 void 8094 key_update_used(void) 8095 { 8096 switch (ipsec_enabled) { 8097 default: 8098 case 0: 8099 #ifdef notyet 8100 /* XXX: racy */ 8101 ipsec_used = 0; 8102 #endif 8103 break; 8104 case 1: 8105 #ifndef notyet 8106 /* XXX: racy */ 8107 if (!ipsec_used) 8108 #endif 8109 ipsec_used = key_get_used(); 8110 break; 8111 case 2: 8112 ipsec_used = 1; 8113 break; 8114 } 8115 } 8116 8117 static int 8118 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8119 { 8120 struct mbuf *m, *n; 8121 int err2 = 0; 8122 char *p, *ep; 8123 size_t len; 8124 int s, error; 8125 8126 if (newp) 8127 return (EPERM); 8128 if (namelen != 1) 8129 return (EINVAL); 8130 8131 s = splsoftnet(); 8132 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8133 splx(s); 8134 if (!m) 8135 return (error); 8136 if (!oldp) 8137 *oldlenp = m->m_pkthdr.len; 8138 else { 8139 p = oldp; 8140 if (*oldlenp < m->m_pkthdr.len) { 8141 err2 = ENOMEM; 8142 ep = p + *oldlenp; 8143 } else { 8144 *oldlenp = m->m_pkthdr.len; 8145 ep = p + m->m_pkthdr.len; 8146 } 8147 for (n = m; n; n = n->m_next) { 8148 len = (ep - p < n->m_len) ? 8149 ep - p : n->m_len; 8150 error = copyout(mtod(n, const void *), p, len); 8151 p += len; 8152 if (error) 8153 break; 8154 } 8155 if (error == 0) 8156 error = err2; 8157 } 8158 m_freem(m); 8159 8160 return (error); 8161 } 8162 8163 static int 8164 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8165 { 8166 struct mbuf *m, *n; 8167 int err2 = 0; 8168 char *p, *ep; 8169 size_t len; 8170 int s, error; 8171 8172 if (newp) 8173 return (EPERM); 8174 if (namelen != 0) 8175 return (EINVAL); 8176 8177 s = splsoftnet(); 8178 m = key_setspddump(&error, l->l_proc->p_pid); 8179 splx(s); 8180 if (!m) 8181 return (error); 8182 if (!oldp) 8183 *oldlenp = m->m_pkthdr.len; 8184 else { 8185 p = oldp; 8186 if (*oldlenp < m->m_pkthdr.len) { 8187 err2 = ENOMEM; 8188 ep = p + *oldlenp; 8189 } else { 8190 *oldlenp = m->m_pkthdr.len; 8191 ep = p + m->m_pkthdr.len; 8192 } 8193 for (n = m; n; n = n->m_next) { 8194 len = (ep - p < n->m_len) ? 8195 ep - p : n->m_len; 8196 error = copyout(mtod(n, const void *), p, len); 8197 p += len; 8198 if (error) 8199 break; 8200 } 8201 if (error == 0) 8202 error = err2; 8203 } 8204 m_freem(m); 8205 8206 return (error); 8207 } 8208 8209 /* 8210 * Create sysctl tree for native IPSEC key knobs, originally 8211 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8212 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8213 * and in any case the part of our sysctl namespace used for dumping the 8214 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8215 * namespace, for API reasons. 8216 * 8217 * Pending a consensus on the right way to fix this, add a level of 8218 * indirection in how we number the `native' IPSEC key nodes; 8219 * and (as requested by Andrew Brown) move registration of the 8220 * KAME-compatible names to a separate function. 8221 */ 8222 #if 0 8223 # define IPSEC_PFKEY PF_KEY_V2 8224 # define IPSEC_PFKEY_NAME "keyv2" 8225 #else 8226 # define IPSEC_PFKEY PF_KEY 8227 # define IPSEC_PFKEY_NAME "key" 8228 #endif 8229 8230 static int 8231 sysctl_net_key_stats(SYSCTLFN_ARGS) 8232 { 8233 8234 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8235 } 8236 8237 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 8238 { 8239 8240 sysctl_createv(clog, 0, NULL, NULL, 8241 CTLFLAG_PERMANENT, 8242 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8243 NULL, 0, NULL, 0, 8244 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8245 8246 sysctl_createv(clog, 0, NULL, NULL, 8247 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8248 CTLTYPE_INT, "debug", NULL, 8249 NULL, 0, &key_debug_level, 0, 8250 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8251 sysctl_createv(clog, 0, NULL, NULL, 8252 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8253 CTLTYPE_INT, "spi_try", NULL, 8254 NULL, 0, &key_spi_trycnt, 0, 8255 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8256 sysctl_createv(clog, 0, NULL, NULL, 8257 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8258 CTLTYPE_INT, "spi_min_value", NULL, 8259 NULL, 0, &key_spi_minval, 0, 8260 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8261 sysctl_createv(clog, 0, NULL, NULL, 8262 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8263 CTLTYPE_INT, "spi_max_value", NULL, 8264 NULL, 0, &key_spi_maxval, 0, 8265 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8266 sysctl_createv(clog, 0, NULL, NULL, 8267 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8268 CTLTYPE_INT, "random_int", NULL, 8269 NULL, 0, &key_int_random, 0, 8270 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8271 sysctl_createv(clog, 0, NULL, NULL, 8272 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8273 CTLTYPE_INT, "larval_lifetime", NULL, 8274 NULL, 0, &key_larval_lifetime, 0, 8275 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8276 sysctl_createv(clog, 0, NULL, NULL, 8277 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8278 CTLTYPE_INT, "blockacq_count", NULL, 8279 NULL, 0, &key_blockacq_count, 0, 8280 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8281 sysctl_createv(clog, 0, NULL, NULL, 8282 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8283 CTLTYPE_INT, "blockacq_lifetime", NULL, 8284 NULL, 0, &key_blockacq_lifetime, 0, 8285 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8286 sysctl_createv(clog, 0, NULL, NULL, 8287 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8288 CTLTYPE_INT, "esp_keymin", NULL, 8289 NULL, 0, &ipsec_esp_keymin, 0, 8290 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8291 sysctl_createv(clog, 0, NULL, NULL, 8292 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8293 CTLTYPE_INT, "prefered_oldsa", NULL, 8294 NULL, 0, &key_prefered_oldsa, 0, 8295 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8296 sysctl_createv(clog, 0, NULL, NULL, 8297 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8298 CTLTYPE_INT, "esp_auth", NULL, 8299 NULL, 0, &ipsec_esp_auth, 0, 8300 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8301 sysctl_createv(clog, 0, NULL, NULL, 8302 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8303 CTLTYPE_INT, "ah_keymin", NULL, 8304 NULL, 0, &ipsec_ah_keymin, 0, 8305 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8306 sysctl_createv(clog, 0, NULL, NULL, 8307 CTLFLAG_PERMANENT, 8308 CTLTYPE_STRUCT, "stats", 8309 SYSCTL_DESCR("PF_KEY statistics"), 8310 sysctl_net_key_stats, 0, NULL, 0, 8311 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8312 } 8313 8314 /* 8315 * Register sysctl names used by setkey(8). For historical reasons, 8316 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8317 * for both IPSEC and KAME IPSEC. 8318 */ 8319 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for IPSEC") 8320 { 8321 8322 sysctl_createv(clog, 0, NULL, NULL, 8323 CTLFLAG_PERMANENT, 8324 CTLTYPE_NODE, "key", NULL, 8325 NULL, 0, NULL, 0, 8326 CTL_NET, PF_KEY, CTL_EOL); 8327 8328 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8329 sysctl_createv(clog, 0, NULL, NULL, 8330 CTLFLAG_PERMANENT, 8331 CTLTYPE_STRUCT, "dumpsa", NULL, 8332 sysctl_net_key_dumpsa, 0, NULL, 0, 8333 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8334 sysctl_createv(clog, 0, NULL, NULL, 8335 CTLFLAG_PERMANENT, 8336 CTLTYPE_STRUCT, "dumpsp", NULL, 8337 sysctl_net_key_dumpsp, 0, NULL, 0, 8338 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8339 } 8340
Indexes created Tue Sep 23 20:09:58 GMT 2025