key.c revision 1.74
1 /* $NetBSD: key.c,v 1.74 2011/07/17 20:54:54 joerg 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 1.74 2011/07/17 20:54:54 joerg 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 68 #include <net/if.h> 69 #include <net/route.h> 70 #include <net/raw_cb.h> 71 72 #include <netinet/in.h> 73 #include <netinet/in_systm.h> 74 #include <netinet/ip.h> 75 #include <netinet/in_var.h> 76 #ifdef INET 77 #include <netinet/ip_var.h> 78 #endif 79 80 #ifdef INET6 81 #include <netinet/ip6.h> 82 #include <netinet6/in6_var.h> 83 #include <netinet6/ip6_var.h> 84 #endif /* INET6 */ 85 86 #ifdef INET 87 #include <netinet/in_pcb.h> 88 #endif 89 #ifdef INET6 90 #include <netinet6/in6_pcb.h> 91 #endif /* INET6 */ 92 93 #include <net/pfkeyv2.h> 94 #include <netipsec/keydb.h> 95 #include <netipsec/key.h> 96 #include <netipsec/keysock.h> 97 #include <netipsec/key_debug.h> 98 99 #include <netipsec/ipsec.h> 100 #ifdef INET6 101 #include <netipsec/ipsec6.h> 102 #endif 103 #include <netipsec/ipsec_private.h> 104 105 #include <netipsec/xform.h> 106 #include <netipsec/ipsec_osdep.h> 107 #include <netipsec/ipcomp.h> 108 109 110 #include <net/net_osdep.h> 111 112 #define FULLMASK 0xff 113 #define _BITS(bytes) ((bytes) << 3) 114 115 percpu_t *pfkeystat_percpu; 116 117 /* 118 * Note on SA reference counting: 119 * - SAs that are not in DEAD state will have (total external reference + 1) 120 * following value in reference count field. they cannot be freed and are 121 * referenced from SA header. 122 * - SAs that are in DEAD state will have (total external reference) 123 * in reference count field. they are ready to be freed. reference from 124 * SA header will be removed in key_delsav(), when the reference count 125 * field hits 0 (= no external reference other than from SA header. 126 */ 127 128 u_int32_t key_debug_level = 0; 129 static u_int key_spi_trycnt = 1000; 130 static u_int32_t key_spi_minval = 0x100; 131 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 132 static u_int32_t policy_id = 0; 133 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 134 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 135 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 136 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 137 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 138 139 static u_int32_t acq_seq = 0; 140 static int key_tick_init_random = 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) = (t)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 #ifdef IPSEC_NAT_T 404 static int key_nat_map (struct socket *, struct mbuf *, 405 const struct sadb_msghdr *); 406 #endif 407 static struct mbuf *key_setdumpsp (struct secpolicy *, 408 u_int8_t, u_int32_t, pid_t); 409 static u_int key_getspreqmsglen (const struct secpolicy *); 410 static int key_spdexpire (struct secpolicy *); 411 static struct secashead *key_newsah (const struct secasindex *); 412 static void key_delsah (struct secashead *); 413 static struct secasvar *key_newsav (struct mbuf *, 414 const struct sadb_msghdr *, struct secashead *, int *, 415 const char*, int); 416 #define KEY_NEWSAV(m, sadb, sah, e) \ 417 key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 418 static void key_delsav (struct secasvar *); 419 static struct secashead *key_getsah (const struct secasindex *); 420 static struct secasvar *key_checkspidup (const struct secasindex *, u_int32_t); 421 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 422 static int key_setsaval (struct secasvar *, struct mbuf *, 423 const struct sadb_msghdr *); 424 static int key_mature (struct secasvar *); 425 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 426 u_int8_t, u_int32_t, u_int32_t); 427 #ifdef IPSEC_NAT_T 428 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 429 static struct mbuf *key_setsadbxtype (u_int16_t); 430 #endif 431 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 432 static int key_checksalen (const union sockaddr_union *); 433 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 434 u_int32_t, pid_t, u_int16_t); 435 static struct mbuf *key_setsadbsa (struct secasvar *); 436 static struct mbuf *key_setsadbaddr (u_int16_t, 437 const struct sockaddr *, u_int8_t, u_int16_t); 438 #if 0 439 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 440 int, u_int64_t); 441 #endif 442 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 443 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 444 u_int32_t); 445 static void *key_newbuf (const void *, u_int); 446 #ifdef INET6 447 static int key_ismyaddr6 (const struct sockaddr_in6 *); 448 #endif 449 450 /* flags for key_cmpsaidx() */ 451 #define CMP_HEAD 1 /* protocol, addresses. */ 452 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 453 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 454 #define CMP_EXACTLY 4 /* all elements. */ 455 static int key_cmpsaidx 456 (const struct secasindex *, const struct secasindex *, int); 457 458 static int key_sockaddrcmp (const struct sockaddr *, const struct sockaddr *, int); 459 static int key_bbcmp (const void *, const void *, u_int); 460 static void key_srandom (void); 461 static u_int16_t key_satype2proto (u_int8_t); 462 static u_int8_t key_proto2satype (u_int16_t); 463 464 static int key_getspi (struct socket *, struct mbuf *, 465 const struct sadb_msghdr *); 466 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 467 const struct secasindex *); 468 #ifdef IPSEC_NAT_T 469 static int key_handle_natt_info (struct secasvar *, 470 const struct sadb_msghdr *); 471 static int key_set_natt_ports (union sockaddr_union *, 472 union sockaddr_union *, 473 const struct sadb_msghdr *); 474 #endif 475 static int key_update (struct socket *, struct mbuf *, 476 const struct sadb_msghdr *); 477 #ifdef IPSEC_DOSEQCHECK 478 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 479 #endif 480 static int key_add (struct socket *, struct mbuf *, 481 const struct sadb_msghdr *); 482 static int key_setident (struct secashead *, struct mbuf *, 483 const struct sadb_msghdr *); 484 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 485 const struct sadb_msghdr *); 486 static int key_delete (struct socket *, struct mbuf *, 487 const struct sadb_msghdr *); 488 static int key_get (struct socket *, struct mbuf *, 489 const struct sadb_msghdr *); 490 491 static void key_getcomb_setlifetime (struct sadb_comb *); 492 static struct mbuf *key_getcomb_esp (void); 493 static struct mbuf *key_getcomb_ah (void); 494 static struct mbuf *key_getcomb_ipcomp (void); 495 static struct mbuf *key_getprop (const struct secasindex *); 496 497 static int key_acquire (const struct secasindex *, struct secpolicy *); 498 #ifndef IPSEC_NONBLOCK_ACQUIRE 499 static struct secacq *key_newacq (const struct secasindex *); 500 static struct secacq *key_getacq (const struct secasindex *); 501 static struct secacq *key_getacqbyseq (u_int32_t); 502 #endif 503 static struct secspacq *key_newspacq (const struct secpolicyindex *); 504 static struct secspacq *key_getspacq (const struct secpolicyindex *); 505 static int key_acquire2 (struct socket *, struct mbuf *, 506 const struct sadb_msghdr *); 507 static int key_register (struct socket *, struct mbuf *, 508 const struct sadb_msghdr *); 509 static int key_expire (struct secasvar *); 510 static int key_flush (struct socket *, struct mbuf *, 511 const struct sadb_msghdr *); 512 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 513 int *lenp, pid_t pid); 514 static int key_dump (struct socket *, struct mbuf *, 515 const struct sadb_msghdr *); 516 static int key_promisc (struct socket *, struct mbuf *, 517 const struct sadb_msghdr *); 518 static int key_senderror (struct socket *, struct mbuf *, int); 519 static int key_validate_ext (const struct sadb_ext *, int); 520 static int key_align (struct mbuf *, struct sadb_msghdr *); 521 #if 0 522 static const char *key_getfqdn (void); 523 static const char *key_getuserfqdn (void); 524 #endif 525 static void key_sa_chgstate (struct secasvar *, u_int8_t); 526 static inline void key_sp_dead (struct secpolicy *); 527 static void key_sp_unlink (struct secpolicy *sp); 528 529 static struct mbuf *key_alloc_mbuf (int); 530 struct callout key_timehandler_ch; 531 532 #define SA_ADDREF(p) do { \ 533 (p)->refcnt++; \ 534 IPSEC_ASSERT((p)->refcnt != 0, \ 535 ("SA refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 536 } while (0) 537 #define SA_DELREF(p) do { \ 538 IPSEC_ASSERT((p)->refcnt > 0, \ 539 ("SA refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 540 (p)->refcnt--; \ 541 } while (0) 542 543 #define SP_ADDREF(p) do { \ 544 (p)->refcnt++; \ 545 IPSEC_ASSERT((p)->refcnt != 0, \ 546 ("SP refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 547 } while (0) 548 #define SP_DELREF(p) do { \ 549 IPSEC_ASSERT((p)->refcnt > 0, \ 550 ("SP refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 551 (p)->refcnt--; \ 552 } while (0) 553 554 555 static inline void 556 key_sp_dead(struct secpolicy *sp) 557 { 558 559 /* mark the SP dead */ 560 sp->state = IPSEC_SPSTATE_DEAD; 561 } 562 563 static void 564 key_sp_unlink(struct secpolicy *sp) 565 { 566 567 /* remove from SP index */ 568 if (__LIST_CHAINED(sp)) { 569 LIST_REMOVE(sp, chain); 570 /* Release refcount held just for being on chain */ 571 KEY_FREESP(&sp); 572 } 573 } 574 575 576 /* 577 * Return 0 when there are known to be no SP's for the specified 578 * direction. Otherwise return 1. This is used by IPsec code 579 * to optimize performance. 580 */ 581 int 582 key_havesp(u_int dir) 583 { 584 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 585 LIST_FIRST(&sptree[dir]) != NULL : 1); 586 } 587 588 /* %%% IPsec policy management */ 589 /* 590 * allocating a SP for OUTBOUND or INBOUND packet. 591 * Must call key_freesp() later. 592 * OUT: NULL: not found 593 * others: found and return the pointer. 594 */ 595 struct secpolicy * 596 key_allocsp(const struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 597 { 598 struct secpolicy *sp; 599 int s; 600 601 IPSEC_ASSERT(spidx != NULL, ("key_allocsp: null spidx")); 602 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 603 ("key_allocsp: invalid direction %u", dir)); 604 605 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 606 printf("DP key_allocsp from %s:%u\n", where, tag)); 607 608 /* get a SP entry */ 609 s = splsoftnet(); /*called from softclock()*/ 610 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 611 printf("*** objects\n"); 612 kdebug_secpolicyindex(spidx)); 613 614 LIST_FOREACH(sp, &sptree[dir], chain) { 615 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 616 printf("*** in SPD\n"); 617 kdebug_secpolicyindex(&sp->spidx)); 618 619 if (sp->state == IPSEC_SPSTATE_DEAD) 620 continue; 621 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 622 goto found; 623 } 624 sp = NULL; 625 found: 626 if (sp) { 627 /* sanity check */ 628 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp"); 629 630 /* found a SPD entry */ 631 sp->lastused = time_uptime; 632 SP_ADDREF(sp); 633 } 634 splx(s); 635 636 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 637 printf("DP key_allocsp return SP:%p (ID=%u) refcnt %u\n", 638 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 639 return sp; 640 } 641 642 /* 643 * allocating a SP for OUTBOUND or INBOUND packet. 644 * Must call key_freesp() later. 645 * OUT: NULL: not found 646 * others: found and return the pointer. 647 */ 648 struct secpolicy * 649 key_allocsp2(u_int32_t spi, 650 const union sockaddr_union *dst, 651 u_int8_t proto, 652 u_int dir, 653 const char* where, int tag) 654 { 655 struct secpolicy *sp; 656 int s; 657 658 IPSEC_ASSERT(dst != NULL, ("key_allocsp2: null dst")); 659 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 660 ("key_allocsp2: invalid direction %u", dir)); 661 662 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 663 printf("DP key_allocsp2 from %s:%u\n", where, tag)); 664 665 /* get a SP entry */ 666 s = splsoftnet(); /*called from softclock()*/ 667 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 668 printf("*** objects\n"); 669 printf("spi %u proto %u dir %u\n", spi, proto, dir); 670 kdebug_sockaddr(&dst->sa)); 671 672 LIST_FOREACH(sp, &sptree[dir], chain) { 673 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 674 printf("*** in SPD\n"); 675 kdebug_secpolicyindex(&sp->spidx)); 676 677 if (sp->state == IPSEC_SPSTATE_DEAD) 678 continue; 679 /* compare simple values, then dst address */ 680 if (sp->spidx.ul_proto != proto) 681 continue; 682 /* NB: spi's must exist and match */ 683 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 684 continue; 685 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 686 goto found; 687 } 688 sp = NULL; 689 found: 690 if (sp) { 691 /* sanity check */ 692 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2"); 693 694 /* found a SPD entry */ 695 sp->lastused = time_uptime; 696 SP_ADDREF(sp); 697 } 698 splx(s); 699 700 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 701 printf("DP key_allocsp2 return SP:%p (ID=%u) refcnt %u\n", 702 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 703 return sp; 704 } 705 706 /* 707 * return a policy that matches this particular inbound packet. 708 * XXX slow 709 */ 710 struct secpolicy * 711 key_gettunnel(const struct sockaddr *osrc, 712 const struct sockaddr *odst, 713 const struct sockaddr *isrc, 714 const struct sockaddr *idst, 715 const char* where, int tag) 716 { 717 struct secpolicy *sp; 718 const int dir = IPSEC_DIR_INBOUND; 719 int s; 720 struct ipsecrequest *r1, *r2, *p; 721 struct secpolicyindex spidx; 722 723 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 724 printf("DP key_gettunnel from %s:%u\n", where, tag)); 725 726 if (isrc->sa_family != idst->sa_family) { 727 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.", 728 isrc->sa_family, idst->sa_family)); 729 sp = NULL; 730 goto done; 731 } 732 733 s = splsoftnet(); /*called from softclock()*/ 734 LIST_FOREACH(sp, &sptree[dir], chain) { 735 if (sp->state == IPSEC_SPSTATE_DEAD) 736 continue; 737 738 r1 = r2 = NULL; 739 for (p = sp->req; p; p = p->next) { 740 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 741 continue; 742 743 r1 = r2; 744 r2 = p; 745 746 if (!r1) { 747 /* here we look at address matches only */ 748 spidx = sp->spidx; 749 if (isrc->sa_len > sizeof(spidx.src) || 750 idst->sa_len > sizeof(spidx.dst)) 751 continue; 752 memcpy(&spidx.src, isrc, isrc->sa_len); 753 memcpy(&spidx.dst, idst, idst->sa_len); 754 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 755 continue; 756 } else { 757 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 758 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 759 continue; 760 } 761 762 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 763 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 764 continue; 765 766 goto found; 767 } 768 } 769 sp = NULL; 770 found: 771 if (sp) { 772 sp->lastused = time_uptime; 773 SP_ADDREF(sp); 774 } 775 splx(s); 776 done: 777 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 778 printf("DP key_gettunnel return SP:%p (ID=%u) refcnt %u\n", 779 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 780 return sp; 781 } 782 783 /* 784 * allocating an SA entry for an *OUTBOUND* packet. 785 * checking each request entries in SP, and acquire an SA if need. 786 * OUT: 0: there are valid requests. 787 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 788 */ 789 int 790 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 791 { 792 u_int level; 793 int error; 794 795 IPSEC_ASSERT(isr != NULL, ("key_checkrequest: null isr")); 796 IPSEC_ASSERT(saidx != NULL, ("key_checkrequest: null saidx")); 797 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 798 saidx->mode == IPSEC_MODE_TUNNEL, 799 ("key_checkrequest: unexpected policy %u", saidx->mode)); 800 801 /* get current level */ 802 level = ipsec_get_reqlevel(isr); 803 804 /* 805 * XXX guard against protocol callbacks from the crypto 806 * thread as they reference ipsecrequest.sav which we 807 * temporarily null out below. Need to rethink how we 808 * handle bundled SA's in the callback thread. 809 */ 810 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 811 #if 0 812 /* 813 * We do allocate new SA only if the state of SA in the holder is 814 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 815 */ 816 if (isr->sav != NULL) { 817 if (isr->sav->sah == NULL) 818 panic("key_checkrequest: sah is null"); 819 if (isr->sav == (struct secasvar *)LIST_FIRST( 820 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 821 KEY_FREESAV(&isr->sav); 822 isr->sav = NULL; 823 } 824 } 825 #else 826 /* 827 * we free any SA stashed in the IPsec request because a different 828 * SA may be involved each time this request is checked, either 829 * because new SAs are being configured, or this request is 830 * associated with an unconnected datagram socket, or this request 831 * is associated with a system default policy. 832 * 833 * The operation may have negative impact to performance. We may 834 * want to check cached SA carefully, rather than picking new SA 835 * every time. 836 */ 837 if (isr->sav != NULL) { 838 KEY_FREESAV(&isr->sav); 839 isr->sav = NULL; 840 } 841 #endif 842 843 /* 844 * new SA allocation if no SA found. 845 * key_allocsa_policy should allocate the oldest SA available. 846 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 847 */ 848 if (isr->sav == NULL) 849 isr->sav = key_allocsa_policy(saidx); 850 851 /* When there is SA. */ 852 if (isr->sav != NULL) { 853 if (isr->sav->state != SADB_SASTATE_MATURE && 854 isr->sav->state != SADB_SASTATE_DYING) 855 return EINVAL; 856 return 0; 857 } 858 859 /* there is no SA */ 860 error = key_acquire(saidx, isr->sp); 861 if (error != 0) { 862 /* XXX What should I do ? */ 863 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " 864 "from key_acquire.\n", error)); 865 return error; 866 } 867 868 if (level != IPSEC_LEVEL_REQUIRE) { 869 /* XXX sigh, the interface to this routine is botched */ 870 IPSEC_ASSERT(isr->sav == NULL, ("key_checkrequest: unexpected SA")); 871 return 0; 872 } else { 873 return ENOENT; 874 } 875 } 876 877 /* 878 * allocating a SA for policy entry from SAD. 879 * NOTE: searching SAD of aliving state. 880 * OUT: NULL: not found. 881 * others: found and return the pointer. 882 */ 883 static struct secasvar * 884 key_allocsa_policy(const struct secasindex *saidx) 885 { 886 struct secashead *sah; 887 struct secasvar *sav; 888 u_int stateidx, state; 889 const u_int *saorder_state_valid; 890 int arraysize; 891 892 LIST_FOREACH(sah, &sahtree, chain) { 893 if (sah->state == SADB_SASTATE_DEAD) 894 continue; 895 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) 896 goto found; 897 } 898 899 return NULL; 900 901 found: 902 903 /* 904 * search a valid state list for outbound packet. 905 * This search order is important. 906 */ 907 if (key_prefered_oldsa) { 908 saorder_state_valid = saorder_state_valid_prefer_old; 909 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 910 } else { 911 saorder_state_valid = saorder_state_valid_prefer_new; 912 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 913 } 914 915 /* search valid state */ 916 for (stateidx = 0; 917 stateidx < arraysize; 918 stateidx++) { 919 920 state = saorder_state_valid[stateidx]; 921 922 sav = key_do_allocsa_policy(sah, state); 923 if (sav != NULL) 924 return sav; 925 } 926 927 return NULL; 928 } 929 930 /* 931 * searching SAD with direction, protocol, mode and state. 932 * called by key_allocsa_policy(). 933 * OUT: 934 * NULL : not found 935 * others : found, pointer to a SA. 936 */ 937 static struct secasvar * 938 key_do_allocsa_policy(struct secashead *sah, u_int state) 939 { 940 struct secasvar *sav, *nextsav, *candidate, *d; 941 942 /* initilize */ 943 candidate = NULL; 944 945 for (sav = LIST_FIRST(&sah->savtree[state]); 946 sav != NULL; 947 sav = nextsav) { 948 949 nextsav = LIST_NEXT(sav, chain); 950 951 /* sanity check */ 952 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy"); 953 954 /* initialize */ 955 if (candidate == NULL) { 956 candidate = sav; 957 continue; 958 } 959 960 /* Which SA is the better ? */ 961 962 /* sanity check 2 */ 963 if (candidate->lft_c == NULL || sav->lft_c == NULL) 964 panic("key_do_allocsa_policy: " 965 "lifetime_current is NULL"); 966 967 /* What the best method is to compare ? */ 968 if (key_prefered_oldsa) { 969 if (candidate->lft_c->sadb_lifetime_addtime > 970 sav->lft_c->sadb_lifetime_addtime) { 971 candidate = sav; 972 } 973 continue; 974 /*NOTREACHED*/ 975 } 976 977 /* prefered new sa rather than old sa */ 978 if (candidate->lft_c->sadb_lifetime_addtime < 979 sav->lft_c->sadb_lifetime_addtime) { 980 d = candidate; 981 candidate = sav; 982 } else 983 d = sav; 984 985 /* 986 * prepared to delete the SA when there is more 987 * suitable candidate and the lifetime of the SA is not 988 * permanent. 989 */ 990 if (d->lft_c->sadb_lifetime_addtime != 0) { 991 struct mbuf *m, *result = 0; 992 uint8_t satype; 993 994 key_sa_chgstate(d, SADB_SASTATE_DEAD); 995 996 IPSEC_ASSERT(d->refcnt > 0, 997 ("key_do_allocsa_policy: bogus ref count")); 998 999 satype = key_proto2satype(d->sah->saidx.proto); 1000 if (satype == 0) 1001 goto msgfail; 1002 1003 m = key_setsadbmsg(SADB_DELETE, 0, 1004 satype, 0, 0, d->refcnt - 1); 1005 if (!m) 1006 goto msgfail; 1007 result = m; 1008 1009 /* set sadb_address for saidx's. */ 1010 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1011 &d->sah->saidx.src.sa, 1012 d->sah->saidx.src.sa.sa_len << 3, 1013 IPSEC_ULPROTO_ANY); 1014 if (!m) 1015 goto msgfail; 1016 m_cat(result, m); 1017 1018 /* set sadb_address for saidx's. */ 1019 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1020 &d->sah->saidx.src.sa, 1021 d->sah->saidx.src.sa.sa_len << 3, 1022 IPSEC_ULPROTO_ANY); 1023 if (!m) 1024 goto msgfail; 1025 m_cat(result, m); 1026 1027 /* create SA extension */ 1028 m = key_setsadbsa(d); 1029 if (!m) 1030 goto msgfail; 1031 m_cat(result, m); 1032 1033 if (result->m_len < sizeof(struct sadb_msg)) { 1034 result = m_pullup(result, 1035 sizeof(struct sadb_msg)); 1036 if (result == NULL) 1037 goto msgfail; 1038 } 1039 1040 result->m_pkthdr.len = 0; 1041 for (m = result; m; m = m->m_next) 1042 result->m_pkthdr.len += m->m_len; 1043 mtod(result, struct sadb_msg *)->sadb_msg_len = 1044 PFKEY_UNIT64(result->m_pkthdr.len); 1045 1046 key_sendup_mbuf(NULL, result, 1047 KEY_SENDUP_REGISTERED); 1048 result = 0; 1049 msgfail: 1050 if (result) 1051 m_freem(result); 1052 KEY_FREESAV(&d); 1053 } 1054 } 1055 1056 if (candidate) { 1057 SA_ADDREF(candidate); 1058 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1059 printf("DP allocsa_policy cause " 1060 "refcnt++:%d SA:%p\n", 1061 candidate->refcnt, candidate)); 1062 } 1063 return candidate; 1064 } 1065 1066 /* 1067 * allocating a usable SA entry for a *INBOUND* packet. 1068 * Must call key_freesav() later. 1069 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1070 * NULL: not found, or error occurred. 1071 * 1072 * In the comparison, no source address is used--for RFC2401 conformance. 1073 * To quote, from section 4.1: 1074 * A security association is uniquely identified by a triple consisting 1075 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1076 * security protocol (AH or ESP) identifier. 1077 * Note that, however, we do need to keep source address in IPsec SA. 1078 * IKE specification and PF_KEY specification do assume that we 1079 * keep source address in IPsec SA. We see a tricky situation here. 1080 * 1081 * sport and dport are used for NAT-T. network order is always used. 1082 */ 1083 struct secasvar * 1084 key_allocsa( 1085 const union sockaddr_union *dst, 1086 u_int proto, 1087 u_int32_t spi, 1088 u_int16_t sport, 1089 u_int16_t dport, 1090 const char* where, int tag) 1091 { 1092 struct secashead *sah; 1093 struct secasvar *sav; 1094 u_int stateidx, state; 1095 const u_int *saorder_state_valid; 1096 int arraysize; 1097 int s; 1098 int chkport = 0; 1099 1100 int must_check_spi = 1; 1101 int must_check_alg = 0; 1102 u_int16_t cpi = 0; 1103 u_int8_t algo = 0; 1104 1105 #ifdef IPSEC_NAT_T 1106 if ((sport != 0) && (dport != 0)) 1107 chkport = 1; 1108 #endif 1109 1110 IPSEC_ASSERT(dst != NULL, ("key_allocsa: null dst address")); 1111 1112 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1113 printf("DP key_allocsa from %s:%u\n", where, tag)); 1114 1115 /* 1116 * XXX IPCOMP case 1117 * We use cpi to define spi here. In the case where cpi <= 1118 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1119 * the real spi. In this case, don't check the spi but check the 1120 * algorithm 1121 */ 1122 1123 if (proto == IPPROTO_IPCOMP) { 1124 u_int32_t tmp; 1125 tmp = ntohl(spi); 1126 cpi = (u_int16_t) tmp; 1127 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1128 algo = (u_int8_t) cpi; 1129 must_check_spi = 0; 1130 must_check_alg = 1; 1131 } 1132 } 1133 1134 /* 1135 * searching SAD. 1136 * XXX: to be checked internal IP header somewhere. Also when 1137 * IPsec tunnel packet is received. But ESP tunnel mode is 1138 * encrypted so we can't check internal IP header. 1139 */ 1140 s = splsoftnet(); /*called from softclock()*/ 1141 if (key_prefered_oldsa) { 1142 saorder_state_valid = saorder_state_valid_prefer_old; 1143 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1144 } else { 1145 saorder_state_valid = saorder_state_valid_prefer_new; 1146 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1147 } 1148 LIST_FOREACH(sah, &sahtree, chain) { 1149 /* search valid state */ 1150 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1151 state = saorder_state_valid[stateidx]; 1152 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1153 /* sanity check */ 1154 KEY_CHKSASTATE(sav->state, state, "key_allocsav"); 1155 /* do not return entries w/ unusable state */ 1156 if (sav->state != SADB_SASTATE_MATURE && 1157 sav->state != SADB_SASTATE_DYING) 1158 continue; 1159 if (proto != sav->sah->saidx.proto) 1160 continue; 1161 if (must_check_spi && spi != sav->spi) 1162 continue; 1163 /* XXX only on the ipcomp case */ 1164 if (must_check_alg && algo != sav->alg_comp) 1165 continue; 1166 1167 #if 0 /* don't check src */ 1168 /* Fix port in src->sa */ 1169 1170 /* check src address */ 1171 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0) 1172 continue; 1173 #endif 1174 /* fix port of dst address XXX*/ 1175 key_porttosaddr(__UNCONST(dst), dport); 1176 /* check dst address */ 1177 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1178 continue; 1179 SA_ADDREF(sav); 1180 goto done; 1181 } 1182 } 1183 } 1184 sav = NULL; 1185 done: 1186 splx(s); 1187 1188 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1189 printf("DP key_allocsa return SA:%p; refcnt %u\n", 1190 sav, sav ? sav->refcnt : 0)); 1191 return sav; 1192 } 1193 1194 /* 1195 * Must be called after calling key_allocsp(). 1196 * For both the packet without socket and key_freeso(). 1197 */ 1198 void 1199 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1200 { 1201 struct secpolicy *sp = *spp; 1202 1203 IPSEC_ASSERT(sp != NULL, ("key_freesp: null sp")); 1204 1205 SP_DELREF(sp); 1206 1207 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1208 printf("DP key_freesp SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1209 sp, sp->id, where, tag, sp->refcnt)); 1210 1211 if (sp->refcnt == 0) { 1212 *spp = NULL; 1213 key_delsp(sp); 1214 } 1215 } 1216 1217 /* 1218 * Must be called after calling key_allocsp(). 1219 * For the packet with socket. 1220 */ 1221 void 1222 key_freeso(struct socket *so) 1223 { 1224 /* sanity check */ 1225 IPSEC_ASSERT(so != NULL, ("key_freeso: null so")); 1226 1227 switch (so->so_proto->pr_domain->dom_family) { 1228 #ifdef INET 1229 case PF_INET: 1230 { 1231 struct inpcb *pcb = sotoinpcb(so); 1232 1233 /* Does it have a PCB ? */ 1234 if (pcb == NULL) 1235 return; 1236 key_freesp_so(&pcb->inp_sp->sp_in); 1237 key_freesp_so(&pcb->inp_sp->sp_out); 1238 } 1239 break; 1240 #endif 1241 #ifdef INET6 1242 case PF_INET6: 1243 { 1244 #ifdef HAVE_NRL_INPCB 1245 struct inpcb *pcb = sotoinpcb(so); 1246 1247 /* Does it have a PCB ? */ 1248 if (pcb == NULL) 1249 return; 1250 key_freesp_so(&pcb->inp_sp->sp_in); 1251 key_freesp_so(&pcb->inp_sp->sp_out); 1252 #else 1253 struct in6pcb *pcb = sotoin6pcb(so); 1254 1255 /* Does it have a PCB ? */ 1256 if (pcb == NULL) 1257 return; 1258 key_freesp_so(&pcb->in6p_sp->sp_in); 1259 key_freesp_so(&pcb->in6p_sp->sp_out); 1260 #endif 1261 } 1262 break; 1263 #endif /* INET6 */ 1264 default: 1265 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1266 so->so_proto->pr_domain->dom_family)); 1267 return; 1268 } 1269 } 1270 1271 static void 1272 key_freesp_so(struct secpolicy **sp) 1273 { 1274 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp")); 1275 1276 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1277 (*sp)->policy == IPSEC_POLICY_BYPASS) 1278 return; 1279 1280 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1281 ("key_freesp_so: invalid policy %u", (*sp)->policy)); 1282 KEY_FREESP(sp); 1283 } 1284 1285 /* 1286 * Must be called after calling key_allocsa(). 1287 * This function is called by key_freesp() to free some SA allocated 1288 * for a policy. 1289 */ 1290 void 1291 key_freesav(struct secasvar **psav, const char* where, int tag) 1292 { 1293 struct secasvar *sav = *psav; 1294 1295 IPSEC_ASSERT(sav != NULL, ("key_freesav: null sav")); 1296 1297 SA_DELREF(sav); 1298 1299 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1300 printf("DP key_freesav SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1301 sav, (u_long)ntohl(sav->spi), 1302 where, tag, sav->refcnt)); 1303 1304 if (sav->refcnt == 0) { 1305 *psav = NULL; 1306 key_delsav(sav); 1307 } 1308 } 1309 1310 /* %%% SPD management */ 1311 /* 1312 * free security policy entry. 1313 */ 1314 static void 1315 key_delsp(struct secpolicy *sp) 1316 { 1317 int s; 1318 1319 IPSEC_ASSERT(sp != NULL, ("key_delsp: null sp")); 1320 1321 key_sp_dead(sp); 1322 1323 IPSEC_ASSERT(sp->refcnt == 0, 1324 ("key_delsp: SP with references deleted (refcnt %u)", 1325 sp->refcnt)); 1326 1327 s = splsoftnet(); /*called from softclock()*/ 1328 1329 { 1330 struct ipsecrequest *isr = sp->req, *nextisr; 1331 1332 while (isr != NULL) { 1333 if (isr->sav != NULL) { 1334 KEY_FREESAV(&isr->sav); 1335 isr->sav = NULL; 1336 } 1337 1338 nextisr = isr->next; 1339 KFREE(isr); 1340 isr = nextisr; 1341 } 1342 } 1343 1344 KFREE(sp); 1345 1346 splx(s); 1347 } 1348 1349 /* 1350 * search SPD 1351 * OUT: NULL : not found 1352 * others : found, pointer to a SP. 1353 */ 1354 static struct secpolicy * 1355 key_getsp(const struct secpolicyindex *spidx) 1356 { 1357 struct secpolicy *sp; 1358 1359 IPSEC_ASSERT(spidx != NULL, ("key_getsp: null spidx")); 1360 1361 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1362 if (sp->state == IPSEC_SPSTATE_DEAD) 1363 continue; 1364 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1365 SP_ADDREF(sp); 1366 return sp; 1367 } 1368 } 1369 1370 return NULL; 1371 } 1372 1373 /* 1374 * get SP by index. 1375 * OUT: NULL : not found 1376 * others : found, pointer to a SP. 1377 */ 1378 static struct secpolicy * 1379 key_getspbyid(u_int32_t id) 1380 { 1381 struct secpolicy *sp; 1382 1383 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1384 if (sp->state == IPSEC_SPSTATE_DEAD) 1385 continue; 1386 if (sp->id == id) { 1387 SP_ADDREF(sp); 1388 return sp; 1389 } 1390 } 1391 1392 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1393 if (sp->state == IPSEC_SPSTATE_DEAD) 1394 continue; 1395 if (sp->id == id) { 1396 SP_ADDREF(sp); 1397 return sp; 1398 } 1399 } 1400 1401 return NULL; 1402 } 1403 1404 struct secpolicy * 1405 key_newsp(const char* where, int tag) 1406 { 1407 struct secpolicy *newsp = NULL; 1408 1409 newsp = (struct secpolicy *) 1410 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); 1411 if (newsp) { 1412 newsp->refcnt = 1; 1413 newsp->req = NULL; 1414 } 1415 1416 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1417 printf("DP key_newsp from %s:%u return SP:%p\n", 1418 where, tag, newsp)); 1419 return newsp; 1420 } 1421 1422 /* 1423 * create secpolicy structure from sadb_x_policy structure. 1424 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1425 * so must be set properly later. 1426 */ 1427 struct secpolicy * 1428 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1429 { 1430 struct secpolicy *newsp; 1431 1432 /* sanity check */ 1433 if (xpl0 == NULL) 1434 panic("key_msg2sp: NULL pointer was passed"); 1435 if (len < sizeof(*xpl0)) 1436 panic("key_msg2sp: invalid length"); 1437 if (len != PFKEY_EXTLEN(xpl0)) { 1438 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1439 *error = EINVAL; 1440 return NULL; 1441 } 1442 1443 if ((newsp = KEY_NEWSP()) == NULL) { 1444 *error = ENOBUFS; 1445 return NULL; 1446 } 1447 1448 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1449 newsp->policy = xpl0->sadb_x_policy_type; 1450 1451 /* check policy */ 1452 switch (xpl0->sadb_x_policy_type) { 1453 case IPSEC_POLICY_DISCARD: 1454 case IPSEC_POLICY_NONE: 1455 case IPSEC_POLICY_ENTRUST: 1456 case IPSEC_POLICY_BYPASS: 1457 newsp->req = NULL; 1458 break; 1459 1460 case IPSEC_POLICY_IPSEC: 1461 { 1462 int tlen; 1463 const struct sadb_x_ipsecrequest *xisr; 1464 uint16_t xisr_reqid; 1465 struct ipsecrequest **p_isr = &newsp->req; 1466 1467 /* validity check */ 1468 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1469 ipseclog((LOG_DEBUG, 1470 "key_msg2sp: Invalid msg length.\n")); 1471 KEY_FREESP(&newsp); 1472 *error = EINVAL; 1473 return NULL; 1474 } 1475 1476 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1477 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1478 1479 while (tlen > 0) { 1480 /* length check */ 1481 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1482 ipseclog((LOG_DEBUG, "key_msg2sp: " 1483 "invalid ipsecrequest length.\n")); 1484 KEY_FREESP(&newsp); 1485 *error = EINVAL; 1486 return NULL; 1487 } 1488 1489 /* allocate request buffer */ 1490 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); 1491 if ((*p_isr) == NULL) { 1492 ipseclog((LOG_DEBUG, 1493 "key_msg2sp: No more memory.\n")); 1494 KEY_FREESP(&newsp); 1495 *error = ENOBUFS; 1496 return NULL; 1497 } 1498 memset(*p_isr, 0, sizeof(**p_isr)); 1499 1500 /* set values */ 1501 (*p_isr)->next = NULL; 1502 1503 switch (xisr->sadb_x_ipsecrequest_proto) { 1504 case IPPROTO_ESP: 1505 case IPPROTO_AH: 1506 case IPPROTO_IPCOMP: 1507 break; 1508 default: 1509 ipseclog((LOG_DEBUG, 1510 "key_msg2sp: invalid proto type=%u\n", 1511 xisr->sadb_x_ipsecrequest_proto)); 1512 KEY_FREESP(&newsp); 1513 *error = EPROTONOSUPPORT; 1514 return NULL; 1515 } 1516 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1517 1518 switch (xisr->sadb_x_ipsecrequest_mode) { 1519 case IPSEC_MODE_TRANSPORT: 1520 case IPSEC_MODE_TUNNEL: 1521 break; 1522 case IPSEC_MODE_ANY: 1523 default: 1524 ipseclog((LOG_DEBUG, 1525 "key_msg2sp: invalid mode=%u\n", 1526 xisr->sadb_x_ipsecrequest_mode)); 1527 KEY_FREESP(&newsp); 1528 *error = EINVAL; 1529 return NULL; 1530 } 1531 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1532 1533 switch (xisr->sadb_x_ipsecrequest_level) { 1534 case IPSEC_LEVEL_DEFAULT: 1535 case IPSEC_LEVEL_USE: 1536 case IPSEC_LEVEL_REQUIRE: 1537 break; 1538 case IPSEC_LEVEL_UNIQUE: 1539 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1540 /* validity check */ 1541 /* 1542 * If range violation of reqid, kernel will 1543 * update it, don't refuse it. 1544 */ 1545 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1546 ipseclog((LOG_DEBUG, 1547 "key_msg2sp: reqid=%d range " 1548 "violation, updated by kernel.\n", 1549 xisr_reqid)); 1550 xisr_reqid = 0; 1551 } 1552 1553 /* allocate new reqid id if reqid is zero. */ 1554 if (xisr_reqid == 0) { 1555 u_int16_t reqid; 1556 if ((reqid = key_newreqid()) == 0) { 1557 KEY_FREESP(&newsp); 1558 *error = ENOBUFS; 1559 return NULL; 1560 } 1561 (*p_isr)->saidx.reqid = reqid; 1562 } else { 1563 /* set it for manual keying. */ 1564 (*p_isr)->saidx.reqid = xisr_reqid; 1565 } 1566 break; 1567 1568 default: 1569 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1570 xisr->sadb_x_ipsecrequest_level)); 1571 KEY_FREESP(&newsp); 1572 *error = EINVAL; 1573 return NULL; 1574 } 1575 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1576 1577 /* set IP addresses if there */ 1578 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1579 const struct sockaddr *paddr; 1580 1581 paddr = (const struct sockaddr *)(xisr + 1); 1582 1583 /* validity check */ 1584 if (paddr->sa_len 1585 > sizeof((*p_isr)->saidx.src)) { 1586 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1587 "address length.\n")); 1588 KEY_FREESP(&newsp); 1589 *error = EINVAL; 1590 return NULL; 1591 } 1592 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1593 1594 paddr = (const struct sockaddr *)((const char *)paddr 1595 + paddr->sa_len); 1596 1597 /* validity check */ 1598 if (paddr->sa_len 1599 > sizeof((*p_isr)->saidx.dst)) { 1600 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1601 "address length.\n")); 1602 KEY_FREESP(&newsp); 1603 *error = EINVAL; 1604 return NULL; 1605 } 1606 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1607 } 1608 1609 (*p_isr)->sav = NULL; 1610 (*p_isr)->sp = newsp; 1611 1612 /* initialization for the next. */ 1613 p_isr = &(*p_isr)->next; 1614 tlen -= xisr->sadb_x_ipsecrequest_len; 1615 1616 /* validity check */ 1617 if (tlen < 0) { 1618 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1619 KEY_FREESP(&newsp); 1620 *error = EINVAL; 1621 return NULL; 1622 } 1623 1624 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr 1625 + xisr->sadb_x_ipsecrequest_len); 1626 } 1627 } 1628 break; 1629 default: 1630 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1631 KEY_FREESP(&newsp); 1632 *error = EINVAL; 1633 return NULL; 1634 } 1635 1636 *error = 0; 1637 return newsp; 1638 } 1639 1640 static u_int16_t 1641 key_newreqid(void) 1642 { 1643 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1644 1645 auto_reqid = (auto_reqid == 0xffff 1646 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1647 1648 /* XXX should be unique check */ 1649 1650 return auto_reqid; 1651 } 1652 1653 /* 1654 * copy secpolicy struct to sadb_x_policy structure indicated. 1655 */ 1656 struct mbuf * 1657 key_sp2msg(const struct secpolicy *sp) 1658 { 1659 struct sadb_x_policy *xpl; 1660 int tlen; 1661 char *p; 1662 struct mbuf *m; 1663 1664 /* sanity check. */ 1665 if (sp == NULL) 1666 panic("key_sp2msg: NULL pointer was passed"); 1667 1668 tlen = key_getspreqmsglen(sp); 1669 1670 m = key_alloc_mbuf(tlen); 1671 if (!m || m->m_next) { /*XXX*/ 1672 if (m) 1673 m_freem(m); 1674 return NULL; 1675 } 1676 1677 m->m_len = tlen; 1678 m->m_next = NULL; 1679 xpl = mtod(m, struct sadb_x_policy *); 1680 memset(xpl, 0, tlen); 1681 1682 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1683 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1684 xpl->sadb_x_policy_type = sp->policy; 1685 xpl->sadb_x_policy_dir = sp->spidx.dir; 1686 xpl->sadb_x_policy_id = sp->id; 1687 p = (char *)xpl + sizeof(*xpl); 1688 1689 /* if is the policy for ipsec ? */ 1690 if (sp->policy == IPSEC_POLICY_IPSEC) { 1691 struct sadb_x_ipsecrequest *xisr; 1692 struct ipsecrequest *isr; 1693 1694 for (isr = sp->req; isr != NULL; isr = isr->next) { 1695 1696 xisr = (struct sadb_x_ipsecrequest *)p; 1697 1698 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1699 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1700 xisr->sadb_x_ipsecrequest_level = isr->level; 1701 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1702 1703 p += sizeof(*xisr); 1704 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1705 p += isr->saidx.src.sa.sa_len; 1706 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1707 p += isr->saidx.src.sa.sa_len; 1708 1709 xisr->sadb_x_ipsecrequest_len = 1710 PFKEY_ALIGN8(sizeof(*xisr) 1711 + isr->saidx.src.sa.sa_len 1712 + isr->saidx.dst.sa.sa_len); 1713 } 1714 } 1715 1716 return m; 1717 } 1718 1719 /* m will not be freed nor modified */ 1720 static struct mbuf * 1721 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1722 int ndeep, int nitem, ...) 1723 { 1724 va_list ap; 1725 int idx; 1726 int i; 1727 struct mbuf *result = NULL, *n; 1728 int len; 1729 1730 if (m == NULL || mhp == NULL) 1731 panic("null pointer passed to key_gather"); 1732 1733 va_start(ap, nitem); 1734 for (i = 0; i < nitem; i++) { 1735 idx = va_arg(ap, int); 1736 if (idx < 0 || idx > SADB_EXT_MAX) 1737 goto fail; 1738 /* don't attempt to pull empty extension */ 1739 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1740 continue; 1741 if (idx != SADB_EXT_RESERVED && 1742 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1743 continue; 1744 1745 if (idx == SADB_EXT_RESERVED) { 1746 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1747 #ifdef DIAGNOSTIC 1748 if (len > MHLEN) 1749 panic("assumption failed"); 1750 #endif 1751 MGETHDR(n, M_DONTWAIT, MT_DATA); 1752 if (!n) 1753 goto fail; 1754 n->m_len = len; 1755 n->m_next = NULL; 1756 m_copydata(m, 0, sizeof(struct sadb_msg), 1757 mtod(n, void *)); 1758 } else if (i < ndeep) { 1759 len = mhp->extlen[idx]; 1760 n = key_alloc_mbuf(len); 1761 if (!n || n->m_next) { /*XXX*/ 1762 if (n) 1763 m_freem(n); 1764 goto fail; 1765 } 1766 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1767 mtod(n, void *)); 1768 } else { 1769 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1770 M_DONTWAIT); 1771 } 1772 if (n == NULL) 1773 goto fail; 1774 1775 if (result) 1776 m_cat(result, n); 1777 else 1778 result = n; 1779 } 1780 va_end(ap); 1781 1782 if ((result->m_flags & M_PKTHDR) != 0) { 1783 result->m_pkthdr.len = 0; 1784 for (n = result; n; n = n->m_next) 1785 result->m_pkthdr.len += n->m_len; 1786 } 1787 1788 return result; 1789 1790 fail: 1791 va_end(ap); 1792 m_freem(result); 1793 return NULL; 1794 } 1795 1796 /* 1797 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1798 * add an entry to SP database, when received 1799 * <base, address(SD), (lifetime(H),) policy> 1800 * from the user(?). 1801 * Adding to SP database, 1802 * and send 1803 * <base, address(SD), (lifetime(H),) policy> 1804 * to the socket which was send. 1805 * 1806 * SPDADD set a unique policy entry. 1807 * SPDSETIDX like SPDADD without a part of policy requests. 1808 * SPDUPDATE replace a unique policy entry. 1809 * 1810 * m will always be freed. 1811 */ 1812 static int 1813 key_spdadd(struct socket *so, struct mbuf *m, 1814 const struct sadb_msghdr *mhp) 1815 { 1816 const struct sadb_address *src0, *dst0; 1817 const struct sadb_x_policy *xpl0; 1818 struct sadb_x_policy *xpl; 1819 const struct sadb_lifetime *lft = NULL; 1820 struct secpolicyindex spidx; 1821 struct secpolicy *newsp; 1822 int error; 1823 1824 /* sanity check */ 1825 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 1826 panic("key_spdadd: NULL pointer is passed"); 1827 1828 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1829 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1830 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1831 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1832 return key_senderror(so, m, EINVAL); 1833 } 1834 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1835 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1836 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1837 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1838 return key_senderror(so, m, EINVAL); 1839 } 1840 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1841 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1842 < sizeof(struct sadb_lifetime)) { 1843 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1844 return key_senderror(so, m, EINVAL); 1845 } 1846 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1847 } 1848 1849 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1850 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1851 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1852 1853 /* make secindex */ 1854 /* XXX boundary check against sa_len */ 1855 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1856 src0 + 1, 1857 dst0 + 1, 1858 src0->sadb_address_prefixlen, 1859 dst0->sadb_address_prefixlen, 1860 src0->sadb_address_proto, 1861 &spidx); 1862 1863 /* checking the direciton. */ 1864 switch (xpl0->sadb_x_policy_dir) { 1865 case IPSEC_DIR_INBOUND: 1866 case IPSEC_DIR_OUTBOUND: 1867 break; 1868 default: 1869 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1870 mhp->msg->sadb_msg_errno = EINVAL; 1871 return 0; 1872 } 1873 1874 /* check policy */ 1875 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1876 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1877 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1878 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1879 return key_senderror(so, m, EINVAL); 1880 } 1881 1882 /* policy requests are mandatory when action is ipsec. */ 1883 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1884 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1885 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1886 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1887 return key_senderror(so, m, EINVAL); 1888 } 1889 1890 /* 1891 * checking there is SP already or not. 1892 * SPDUPDATE doesn't depend on whether there is a SP or not. 1893 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1894 * then error. 1895 */ 1896 newsp = key_getsp(&spidx); 1897 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1898 if (newsp) { 1899 key_sp_dead(newsp); 1900 key_sp_unlink(newsp); /* XXX jrs ordering */ 1901 KEY_FREESP(&newsp); 1902 newsp = NULL; 1903 } 1904 } else { 1905 if (newsp != NULL) { 1906 KEY_FREESP(&newsp); 1907 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1908 return key_senderror(so, m, EEXIST); 1909 } 1910 } 1911 1912 /* allocation new SP entry */ 1913 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1914 return key_senderror(so, m, error); 1915 } 1916 1917 if ((newsp->id = key_getnewspid()) == 0) { 1918 KFREE(newsp); 1919 return key_senderror(so, m, ENOBUFS); 1920 } 1921 1922 /* XXX boundary check against sa_len */ 1923 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1924 src0 + 1, 1925 dst0 + 1, 1926 src0->sadb_address_prefixlen, 1927 dst0->sadb_address_prefixlen, 1928 src0->sadb_address_proto, 1929 &newsp->spidx); 1930 1931 /* sanity check on addr pair */ 1932 if (((const struct sockaddr *)(src0 + 1))->sa_family != 1933 ((const struct sockaddr *)(dst0+ 1))->sa_family) { 1934 KFREE(newsp); 1935 return key_senderror(so, m, EINVAL); 1936 } 1937 if (((const struct sockaddr *)(src0 + 1))->sa_len != 1938 ((const struct sockaddr *)(dst0+ 1))->sa_len) { 1939 KFREE(newsp); 1940 return key_senderror(so, m, EINVAL); 1941 } 1942 1943 newsp->created = time_uptime; 1944 newsp->lastused = newsp->created; 1945 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1946 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1947 1948 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1949 newsp->state = IPSEC_SPSTATE_ALIVE; 1950 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1951 1952 /* delete the entry in spacqtree */ 1953 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1954 struct secspacq *spacq; 1955 if ((spacq = key_getspacq(&spidx)) != NULL) { 1956 /* reset counter in order to deletion by timehandler. */ 1957 spacq->created = time_uptime; 1958 spacq->count = 0; 1959 } 1960 } 1961 1962 #if defined(__NetBSD__) 1963 /* Invalidate all cached SPD pointers in the PCBs. */ 1964 ipsec_invalpcbcacheall(); 1965 1966 #if defined(GATEWAY) 1967 /* Invalidate the ipflow cache, as well. */ 1968 ipflow_invalidate_all(0); 1969 #ifdef INET6 1970 ip6flow_invalidate_all(0); 1971 #endif /* INET6 */ 1972 #endif /* GATEWAY */ 1973 #endif /* __NetBSD__ */ 1974 1975 { 1976 struct mbuf *n, *mpolicy; 1977 struct sadb_msg *newmsg; 1978 int off; 1979 1980 /* create new sadb_msg to reply. */ 1981 if (lft) { 1982 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1983 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1984 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1985 } else { 1986 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1987 SADB_X_EXT_POLICY, 1988 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1989 } 1990 if (!n) 1991 return key_senderror(so, m, ENOBUFS); 1992 1993 if (n->m_len < sizeof(*newmsg)) { 1994 n = m_pullup(n, sizeof(*newmsg)); 1995 if (!n) 1996 return key_senderror(so, m, ENOBUFS); 1997 } 1998 newmsg = mtod(n, struct sadb_msg *); 1999 newmsg->sadb_msg_errno = 0; 2000 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2001 2002 off = 0; 2003 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2004 sizeof(*xpl), &off); 2005 if (mpolicy == NULL) { 2006 /* n is already freed */ 2007 return key_senderror(so, m, ENOBUFS); 2008 } 2009 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2010 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2011 m_freem(n); 2012 return key_senderror(so, m, EINVAL); 2013 } 2014 xpl->sadb_x_policy_id = newsp->id; 2015 2016 m_freem(m); 2017 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2018 } 2019 } 2020 2021 /* 2022 * get new policy id. 2023 * OUT: 2024 * 0: failure. 2025 * others: success. 2026 */ 2027 static u_int32_t 2028 key_getnewspid(void) 2029 { 2030 u_int32_t newid = 0; 2031 int count = key_spi_trycnt; /* XXX */ 2032 struct secpolicy *sp; 2033 2034 /* when requesting to allocate spi ranged */ 2035 while (count--) { 2036 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2037 2038 if ((sp = key_getspbyid(newid)) == NULL) 2039 break; 2040 2041 KEY_FREESP(&sp); 2042 } 2043 2044 if (count == 0 || newid == 0) { 2045 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2046 return 0; 2047 } 2048 2049 return newid; 2050 } 2051 2052 /* 2053 * SADB_SPDDELETE processing 2054 * receive 2055 * <base, address(SD), policy(*)> 2056 * from the user(?), and set SADB_SASTATE_DEAD, 2057 * and send, 2058 * <base, address(SD), policy(*)> 2059 * to the ikmpd. 2060 * policy(*) including direction of policy. 2061 * 2062 * m will always be freed. 2063 */ 2064 static int 2065 key_spddelete(struct socket *so, struct mbuf *m, 2066 const struct sadb_msghdr *mhp) 2067 { 2068 struct sadb_address *src0, *dst0; 2069 struct sadb_x_policy *xpl0; 2070 struct secpolicyindex spidx; 2071 struct secpolicy *sp; 2072 2073 /* sanity check */ 2074 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2075 panic("key_spddelete: NULL pointer is passed"); 2076 2077 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2078 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2079 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2080 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2081 return key_senderror(so, m, EINVAL); 2082 } 2083 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2084 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2085 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2086 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2087 return key_senderror(so, m, EINVAL); 2088 } 2089 2090 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2091 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2092 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2093 2094 /* make secindex */ 2095 /* XXX boundary check against sa_len */ 2096 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2097 src0 + 1, 2098 dst0 + 1, 2099 src0->sadb_address_prefixlen, 2100 dst0->sadb_address_prefixlen, 2101 src0->sadb_address_proto, 2102 &spidx); 2103 2104 /* checking the direciton. */ 2105 switch (xpl0->sadb_x_policy_dir) { 2106 case IPSEC_DIR_INBOUND: 2107 case IPSEC_DIR_OUTBOUND: 2108 break; 2109 default: 2110 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2111 return key_senderror(so, m, EINVAL); 2112 } 2113 2114 /* Is there SP in SPD ? */ 2115 if ((sp = key_getsp(&spidx)) == NULL) { 2116 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2117 return key_senderror(so, m, EINVAL); 2118 } 2119 2120 /* save policy id to buffer to be returned. */ 2121 xpl0->sadb_x_policy_id = sp->id; 2122 2123 key_sp_dead(sp); 2124 key_sp_unlink(sp); /* XXX jrs ordering */ 2125 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2126 2127 #if defined(__NetBSD__) 2128 /* Invalidate all cached SPD pointers in the PCBs. */ 2129 ipsec_invalpcbcacheall(); 2130 2131 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2132 #endif /* __NetBSD__ */ 2133 2134 { 2135 struct mbuf *n; 2136 struct sadb_msg *newmsg; 2137 2138 /* create new sadb_msg to reply. */ 2139 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2140 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2141 if (!n) 2142 return key_senderror(so, m, ENOBUFS); 2143 2144 newmsg = mtod(n, struct sadb_msg *); 2145 newmsg->sadb_msg_errno = 0; 2146 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2147 2148 m_freem(m); 2149 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2150 } 2151 } 2152 2153 /* 2154 * SADB_SPDDELETE2 processing 2155 * receive 2156 * <base, policy(*)> 2157 * from the user(?), and set SADB_SASTATE_DEAD, 2158 * and send, 2159 * <base, policy(*)> 2160 * to the ikmpd. 2161 * policy(*) including direction of policy. 2162 * 2163 * m will always be freed. 2164 */ 2165 static int 2166 key_spddelete2(struct socket *so, struct mbuf *m, 2167 const struct sadb_msghdr *mhp) 2168 { 2169 u_int32_t id; 2170 struct secpolicy *sp; 2171 2172 /* sanity check */ 2173 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2174 panic("key_spddelete2: NULL pointer is passed"); 2175 2176 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2177 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2178 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2179 key_senderror(so, m, EINVAL); 2180 return 0; 2181 } 2182 2183 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2184 2185 /* Is there SP in SPD ? */ 2186 if ((sp = key_getspbyid(id)) == NULL) { 2187 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2188 return key_senderror(so, m, EINVAL); 2189 } 2190 2191 key_sp_dead(sp); 2192 key_sp_unlink(sp); /* XXX jrs ordering */ 2193 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2194 sp = NULL; 2195 2196 #if defined(__NetBSD__) 2197 /* Invalidate all cached SPD pointers in the PCBs. */ 2198 ipsec_invalpcbcacheall(); 2199 2200 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2201 #endif /* __NetBSD__ */ 2202 2203 { 2204 struct mbuf *n, *nn; 2205 struct sadb_msg *newmsg; 2206 int off, len; 2207 2208 /* create new sadb_msg to reply. */ 2209 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2210 2211 if (len > MCLBYTES) 2212 return key_senderror(so, m, ENOBUFS); 2213 MGETHDR(n, M_DONTWAIT, MT_DATA); 2214 if (n && len > MHLEN) { 2215 MCLGET(n, M_DONTWAIT); 2216 if ((n->m_flags & M_EXT) == 0) { 2217 m_freem(n); 2218 n = NULL; 2219 } 2220 } 2221 if (!n) 2222 return key_senderror(so, m, ENOBUFS); 2223 2224 n->m_len = len; 2225 n->m_next = NULL; 2226 off = 0; 2227 2228 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2229 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2230 2231 #ifdef DIAGNOSTIC 2232 if (off != len) 2233 panic("length inconsistency in key_spddelete2"); 2234 #endif 2235 2236 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2237 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2238 if (!n->m_next) { 2239 m_freem(n); 2240 return key_senderror(so, m, ENOBUFS); 2241 } 2242 2243 n->m_pkthdr.len = 0; 2244 for (nn = n; nn; nn = nn->m_next) 2245 n->m_pkthdr.len += nn->m_len; 2246 2247 newmsg = mtod(n, struct sadb_msg *); 2248 newmsg->sadb_msg_errno = 0; 2249 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2250 2251 m_freem(m); 2252 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2253 } 2254 } 2255 2256 /* 2257 * SADB_X_GET processing 2258 * receive 2259 * <base, policy(*)> 2260 * from the user(?), 2261 * and send, 2262 * <base, address(SD), policy> 2263 * to the ikmpd. 2264 * policy(*) including direction of policy. 2265 * 2266 * m will always be freed. 2267 */ 2268 static int 2269 key_spdget(struct socket *so, struct mbuf *m, 2270 const struct sadb_msghdr *mhp) 2271 { 2272 u_int32_t id; 2273 struct secpolicy *sp; 2274 struct mbuf *n; 2275 2276 /* sanity check */ 2277 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2278 panic("key_spdget: NULL pointer is passed"); 2279 2280 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2281 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2282 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2283 return key_senderror(so, m, EINVAL); 2284 } 2285 2286 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2287 2288 /* Is there SP in SPD ? */ 2289 if ((sp = key_getspbyid(id)) == NULL) { 2290 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2291 return key_senderror(so, m, ENOENT); 2292 } 2293 2294 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2295 mhp->msg->sadb_msg_pid); 2296 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2297 if (n != NULL) { 2298 m_freem(m); 2299 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2300 } else 2301 return key_senderror(so, m, ENOBUFS); 2302 } 2303 2304 /* 2305 * SADB_X_SPDACQUIRE processing. 2306 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2307 * send 2308 * <base, policy(*)> 2309 * to KMD, and expect to receive 2310 * <base> with SADB_X_SPDACQUIRE if error occurred, 2311 * or 2312 * <base, policy> 2313 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2314 * policy(*) is without policy requests. 2315 * 2316 * 0 : succeed 2317 * others: error number 2318 */ 2319 int 2320 key_spdacquire(const struct secpolicy *sp) 2321 { 2322 struct mbuf *result = NULL, *m; 2323 struct secspacq *newspacq; 2324 int error; 2325 2326 /* sanity check */ 2327 if (sp == NULL) 2328 panic("key_spdacquire: NULL pointer is passed"); 2329 if (sp->req != NULL) 2330 panic("key_spdacquire: called but there is request"); 2331 if (sp->policy != IPSEC_POLICY_IPSEC) 2332 panic("key_spdacquire: policy mismathed. IPsec is expected"); 2333 2334 /* Get an entry to check whether sent message or not. */ 2335 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2336 if (key_blockacq_count < newspacq->count) { 2337 /* reset counter and do send message. */ 2338 newspacq->count = 0; 2339 } else { 2340 /* increment counter and do nothing. */ 2341 newspacq->count++; 2342 return 0; 2343 } 2344 } else { 2345 /* make new entry for blocking to send SADB_ACQUIRE. */ 2346 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2347 return ENOBUFS; 2348 2349 /* add to acqtree */ 2350 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2351 } 2352 2353 /* create new sadb_msg to reply. */ 2354 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2355 if (!m) { 2356 error = ENOBUFS; 2357 goto fail; 2358 } 2359 result = m; 2360 2361 result->m_pkthdr.len = 0; 2362 for (m = result; m; m = m->m_next) 2363 result->m_pkthdr.len += m->m_len; 2364 2365 mtod(result, struct sadb_msg *)->sadb_msg_len = 2366 PFKEY_UNIT64(result->m_pkthdr.len); 2367 2368 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2369 2370 fail: 2371 if (result) 2372 m_freem(result); 2373 return error; 2374 } 2375 2376 /* 2377 * SADB_SPDFLUSH processing 2378 * receive 2379 * <base> 2380 * from the user, and free all entries in secpctree. 2381 * and send, 2382 * <base> 2383 * to the user. 2384 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2385 * 2386 * m will always be freed. 2387 */ 2388 static int 2389 key_spdflush(struct socket *so, struct mbuf *m, 2390 const struct sadb_msghdr *mhp) 2391 { 2392 struct sadb_msg *newmsg; 2393 struct secpolicy *sp; 2394 u_int dir; 2395 2396 /* sanity check */ 2397 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2398 panic("key_spdflush: NULL pointer is passed"); 2399 2400 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2401 return key_senderror(so, m, EINVAL); 2402 2403 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2404 struct secpolicy * nextsp; 2405 for (sp = LIST_FIRST(&sptree[dir]); 2406 sp != NULL; 2407 sp = nextsp) { 2408 2409 nextsp = LIST_NEXT(sp, chain); 2410 if (sp->state == IPSEC_SPSTATE_DEAD) 2411 continue; 2412 key_sp_dead(sp); 2413 key_sp_unlink(sp); 2414 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2415 continue; 2416 } 2417 } 2418 2419 #if defined(__NetBSD__) 2420 /* Invalidate all cached SPD pointers in the PCBs. */ 2421 ipsec_invalpcbcacheall(); 2422 2423 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2424 #endif /* __NetBSD__ */ 2425 2426 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2427 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2428 return key_senderror(so, m, ENOBUFS); 2429 } 2430 2431 if (m->m_next) 2432 m_freem(m->m_next); 2433 m->m_next = NULL; 2434 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2435 newmsg = mtod(m, struct sadb_msg *); 2436 newmsg->sadb_msg_errno = 0; 2437 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2438 2439 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2440 } 2441 2442 static struct sockaddr key_src = { 2443 .sa_len = 2, 2444 .sa_family = PF_KEY, 2445 }; 2446 2447 static struct mbuf * 2448 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2449 { 2450 struct secpolicy *sp; 2451 int cnt; 2452 u_int dir; 2453 struct mbuf *m, *n, *prev; 2454 int totlen; 2455 2456 *lenp = 0; 2457 2458 /* search SPD entry and get buffer size. */ 2459 cnt = 0; 2460 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2461 LIST_FOREACH(sp, &sptree[dir], chain) { 2462 cnt++; 2463 } 2464 } 2465 2466 if (cnt == 0) { 2467 *errorp = ENOENT; 2468 return (NULL); 2469 } 2470 2471 m = NULL; 2472 prev = m; 2473 totlen = 0; 2474 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2475 LIST_FOREACH(sp, &sptree[dir], chain) { 2476 --cnt; 2477 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2478 2479 if (!n) { 2480 *errorp = ENOBUFS; 2481 if (m) m_freem(m); 2482 return (NULL); 2483 } 2484 2485 totlen += n->m_pkthdr.len; 2486 if (!m) { 2487 m = n; 2488 } else { 2489 prev->m_nextpkt = n; 2490 } 2491 prev = n; 2492 } 2493 } 2494 2495 *lenp = totlen; 2496 *errorp = 0; 2497 return (m); 2498 } 2499 2500 /* 2501 * SADB_SPDDUMP processing 2502 * receive 2503 * <base> 2504 * from the user, and dump all SP leaves 2505 * and send, 2506 * <base> ..... 2507 * to the ikmpd. 2508 * 2509 * m will always be freed. 2510 */ 2511 static int 2512 key_spddump(struct socket *so, struct mbuf *m0, 2513 const struct sadb_msghdr *mhp) 2514 { 2515 struct mbuf *n; 2516 int error, len; 2517 int ok, s; 2518 pid_t pid; 2519 2520 /* sanity check */ 2521 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 2522 panic("key_spddump: NULL pointer is passed"); 2523 2524 2525 pid = mhp->msg->sadb_msg_pid; 2526 /* 2527 * If the requestor has insufficient socket-buffer space 2528 * for the entire chain, nobody gets any response to the DUMP. 2529 * XXX For now, only the requestor ever gets anything. 2530 * Moreover, if the requestor has any space at all, they receive 2531 * the entire chain, otherwise the request is refused with ENOBUFS. 2532 */ 2533 if (sbspace(&so->so_rcv) <= 0) { 2534 return key_senderror(so, m0, ENOBUFS); 2535 } 2536 2537 s = splsoftnet(); 2538 n = key_setspddump_chain(&error, &len, pid); 2539 splx(s); 2540 2541 if (n == NULL) { 2542 return key_senderror(so, m0, ENOENT); 2543 } 2544 { 2545 uint64_t *ps = PFKEY_STAT_GETREF(); 2546 ps[PFKEY_STAT_IN_TOTAL]++; 2547 ps[PFKEY_STAT_IN_BYTES] += len; 2548 PFKEY_STAT_PUTREF(); 2549 } 2550 2551 /* 2552 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2553 * The requestor receives either the entire chain, or an 2554 * error message with ENOBUFS. 2555 */ 2556 2557 /* 2558 * sbappendchainwith record takes the chain of entries, one 2559 * packet-record per SPD entry, prepends the key_src sockaddr 2560 * to each packet-record, links the sockaddr mbufs into a new 2561 * list of records, then appends the entire resulting 2562 * list to the requesting socket. 2563 */ 2564 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2565 n, SB_PRIO_ONESHOT_OVERFLOW); 2566 2567 if (!ok) { 2568 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2569 m_freem(n); 2570 return key_senderror(so, m0, ENOBUFS); 2571 } 2572 2573 m_freem(m0); 2574 return error; 2575 } 2576 2577 #ifdef IPSEC_NAT_T 2578 /* 2579 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2580 */ 2581 static int 2582 key_nat_map(struct socket *so, struct mbuf *m, 2583 const struct sadb_msghdr *mhp) 2584 { 2585 struct sadb_x_nat_t_type *type; 2586 struct sadb_x_nat_t_port *sport; 2587 struct sadb_x_nat_t_port *dport; 2588 struct sadb_address *iaddr, *raddr; 2589 struct sadb_x_nat_t_frag *frag; 2590 2591 /* sanity check */ 2592 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2593 panic("key_nat_map: NULL pointer is passed."); 2594 2595 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2596 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2597 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2598 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2599 return key_senderror(so, m, EINVAL); 2600 } 2601 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2602 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2603 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 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_OAI] != NULL) && 2609 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 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_OAR] != NULL) && 2615 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2616 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2617 return key_senderror(so, m, EINVAL); 2618 } 2619 2620 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2621 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2622 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2623 return key_senderror(so, m, EINVAL); 2624 } 2625 2626 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2627 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2628 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2629 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2630 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2631 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2632 2633 printf("sadb_nat_map called\n"); 2634 2635 /* 2636 * XXX handle that, it should also contain a SA, or anything 2637 * that enable to update the SA information. 2638 */ 2639 2640 return 0; 2641 } 2642 #endif /* IPSEC_NAT_T */ 2643 2644 static struct mbuf * 2645 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2646 { 2647 struct mbuf *result = NULL, *m; 2648 2649 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2650 if (!m) 2651 goto fail; 2652 result = m; 2653 2654 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2655 &sp->spidx.src.sa, sp->spidx.prefs, 2656 sp->spidx.ul_proto); 2657 if (!m) 2658 goto fail; 2659 m_cat(result, m); 2660 2661 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2662 &sp->spidx.dst.sa, sp->spidx.prefd, 2663 sp->spidx.ul_proto); 2664 if (!m) 2665 goto fail; 2666 m_cat(result, m); 2667 2668 m = key_sp2msg(sp); 2669 if (!m) 2670 goto fail; 2671 m_cat(result, m); 2672 2673 if ((result->m_flags & M_PKTHDR) == 0) 2674 goto fail; 2675 2676 if (result->m_len < sizeof(struct sadb_msg)) { 2677 result = m_pullup(result, sizeof(struct sadb_msg)); 2678 if (result == NULL) 2679 goto fail; 2680 } 2681 2682 result->m_pkthdr.len = 0; 2683 for (m = result; m; m = m->m_next) 2684 result->m_pkthdr.len += m->m_len; 2685 2686 mtod(result, struct sadb_msg *)->sadb_msg_len = 2687 PFKEY_UNIT64(result->m_pkthdr.len); 2688 2689 return result; 2690 2691 fail: 2692 m_freem(result); 2693 return NULL; 2694 } 2695 2696 /* 2697 * get PFKEY message length for security policy and request. 2698 */ 2699 static u_int 2700 key_getspreqmsglen(const struct secpolicy *sp) 2701 { 2702 u_int tlen; 2703 2704 tlen = sizeof(struct sadb_x_policy); 2705 2706 /* if is the policy for ipsec ? */ 2707 if (sp->policy != IPSEC_POLICY_IPSEC) 2708 return tlen; 2709 2710 /* get length of ipsec requests */ 2711 { 2712 const struct ipsecrequest *isr; 2713 int len; 2714 2715 for (isr = sp->req; isr != NULL; isr = isr->next) { 2716 len = sizeof(struct sadb_x_ipsecrequest) 2717 + isr->saidx.src.sa.sa_len 2718 + isr->saidx.dst.sa.sa_len; 2719 2720 tlen += PFKEY_ALIGN8(len); 2721 } 2722 } 2723 2724 return tlen; 2725 } 2726 2727 /* 2728 * SADB_SPDEXPIRE processing 2729 * send 2730 * <base, address(SD), lifetime(CH), policy> 2731 * to KMD by PF_KEY. 2732 * 2733 * OUT: 0 : succeed 2734 * others : error number 2735 */ 2736 static int 2737 key_spdexpire(struct secpolicy *sp) 2738 { 2739 int s; 2740 struct mbuf *result = NULL, *m; 2741 int len; 2742 int error = -1; 2743 struct sadb_lifetime *lt; 2744 2745 /* XXX: Why do we lock ? */ 2746 s = splsoftnet(); /*called from softclock()*/ 2747 2748 /* sanity check */ 2749 if (sp == NULL) 2750 panic("key_spdexpire: NULL pointer is passed"); 2751 2752 /* set msg header */ 2753 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2754 if (!m) { 2755 error = ENOBUFS; 2756 goto fail; 2757 } 2758 result = m; 2759 2760 /* create lifetime extension (current and hard) */ 2761 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2762 m = key_alloc_mbuf(len); 2763 if (!m || m->m_next) { /*XXX*/ 2764 if (m) 2765 m_freem(m); 2766 error = ENOBUFS; 2767 goto fail; 2768 } 2769 memset(mtod(m, void *), 0, len); 2770 lt = mtod(m, struct sadb_lifetime *); 2771 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2772 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2773 lt->sadb_lifetime_allocations = 0; 2774 lt->sadb_lifetime_bytes = 0; 2775 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2776 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2777 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2778 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2779 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2780 lt->sadb_lifetime_allocations = 0; 2781 lt->sadb_lifetime_bytes = 0; 2782 lt->sadb_lifetime_addtime = sp->lifetime; 2783 lt->sadb_lifetime_usetime = sp->validtime; 2784 m_cat(result, m); 2785 2786 /* set sadb_address for source */ 2787 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2788 &sp->spidx.src.sa, 2789 sp->spidx.prefs, sp->spidx.ul_proto); 2790 if (!m) { 2791 error = ENOBUFS; 2792 goto fail; 2793 } 2794 m_cat(result, m); 2795 2796 /* set sadb_address for destination */ 2797 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2798 &sp->spidx.dst.sa, 2799 sp->spidx.prefd, sp->spidx.ul_proto); 2800 if (!m) { 2801 error = ENOBUFS; 2802 goto fail; 2803 } 2804 m_cat(result, m); 2805 2806 /* set secpolicy */ 2807 m = key_sp2msg(sp); 2808 if (!m) { 2809 error = ENOBUFS; 2810 goto fail; 2811 } 2812 m_cat(result, m); 2813 2814 if ((result->m_flags & M_PKTHDR) == 0) { 2815 error = EINVAL; 2816 goto fail; 2817 } 2818 2819 if (result->m_len < sizeof(struct sadb_msg)) { 2820 result = m_pullup(result, sizeof(struct sadb_msg)); 2821 if (result == NULL) { 2822 error = ENOBUFS; 2823 goto fail; 2824 } 2825 } 2826 2827 result->m_pkthdr.len = 0; 2828 for (m = result; m; m = m->m_next) 2829 result->m_pkthdr.len += m->m_len; 2830 2831 mtod(result, struct sadb_msg *)->sadb_msg_len = 2832 PFKEY_UNIT64(result->m_pkthdr.len); 2833 2834 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2835 2836 fail: 2837 if (result) 2838 m_freem(result); 2839 splx(s); 2840 return error; 2841 } 2842 2843 /* %%% SAD management */ 2844 /* 2845 * allocating a memory for new SA head, and copy from the values of mhp. 2846 * OUT: NULL : failure due to the lack of memory. 2847 * others : pointer to new SA head. 2848 */ 2849 static struct secashead * 2850 key_newsah(const struct secasindex *saidx) 2851 { 2852 struct secashead *newsah; 2853 2854 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx")); 2855 2856 newsah = (struct secashead *) 2857 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2858 if (newsah != NULL) { 2859 int i; 2860 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2861 LIST_INIT(&newsah->savtree[i]); 2862 newsah->saidx = *saidx; 2863 2864 /* add to saidxtree */ 2865 newsah->state = SADB_SASTATE_MATURE; 2866 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2867 } 2868 return(newsah); 2869 } 2870 2871 /* 2872 * delete SA index and all SA registerd. 2873 */ 2874 static void 2875 key_delsah(struct secashead *sah) 2876 { 2877 struct secasvar *sav, *nextsav; 2878 u_int stateidx, state; 2879 int s; 2880 int zombie = 0; 2881 2882 /* sanity check */ 2883 if (sah == NULL) 2884 panic("key_delsah: NULL pointer is passed"); 2885 2886 s = splsoftnet(); /*called from softclock()*/ 2887 2888 /* searching all SA registerd in the secindex. */ 2889 for (stateidx = 0; 2890 stateidx < _ARRAYLEN(saorder_state_any); 2891 stateidx++) { 2892 2893 state = saorder_state_any[stateidx]; 2894 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2895 sav != NULL; 2896 sav = nextsav) { 2897 2898 nextsav = LIST_NEXT(sav, chain); 2899 2900 if (sav->refcnt == 0) { 2901 /* sanity check */ 2902 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2903 KEY_FREESAV(&sav); 2904 } else { 2905 /* give up to delete this sa */ 2906 zombie++; 2907 } 2908 } 2909 } 2910 2911 /* don't delete sah only if there are savs. */ 2912 if (zombie) { 2913 splx(s); 2914 return; 2915 } 2916 2917 rtcache_free(&sah->sa_route); 2918 2919 /* remove from tree of SA index */ 2920 if (__LIST_CHAINED(sah)) 2921 LIST_REMOVE(sah, chain); 2922 2923 KFREE(sah); 2924 2925 splx(s); 2926 return; 2927 } 2928 2929 /* 2930 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2931 * and copy the values of mhp into new buffer. 2932 * When SAD message type is GETSPI: 2933 * to set sequence number from acq_seq++, 2934 * to set zero to SPI. 2935 * not to call key_setsava(). 2936 * OUT: NULL : fail 2937 * others : pointer to new secasvar. 2938 * 2939 * does not modify mbuf. does not free mbuf on error. 2940 */ 2941 static struct secasvar * 2942 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2943 struct secashead *sah, int *errp, 2944 const char* where, int tag) 2945 { 2946 struct secasvar *newsav; 2947 const struct sadb_sa *xsa; 2948 2949 /* sanity check */ 2950 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) 2951 panic("key_newsa: NULL pointer is passed"); 2952 2953 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2954 if (newsav == NULL) { 2955 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2956 *errp = ENOBUFS; 2957 goto done; 2958 } 2959 memset(newsav, 0, sizeof(struct secasvar)); 2960 2961 switch (mhp->msg->sadb_msg_type) { 2962 case SADB_GETSPI: 2963 newsav->spi = 0; 2964 2965 #ifdef IPSEC_DOSEQCHECK 2966 /* sync sequence number */ 2967 if (mhp->msg->sadb_msg_seq == 0) 2968 newsav->seq = 2969 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2970 else 2971 #endif 2972 newsav->seq = mhp->msg->sadb_msg_seq; 2973 break; 2974 2975 case SADB_ADD: 2976 /* sanity check */ 2977 if (mhp->ext[SADB_EXT_SA] == NULL) { 2978 KFREE(newsav), newsav = NULL; 2979 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2980 *errp = EINVAL; 2981 goto done; 2982 } 2983 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2984 newsav->spi = xsa->sadb_sa_spi; 2985 newsav->seq = mhp->msg->sadb_msg_seq; 2986 break; 2987 default: 2988 KFREE(newsav), newsav = NULL; 2989 *errp = EINVAL; 2990 goto done; 2991 } 2992 2993 /* copy sav values */ 2994 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2995 *errp = key_setsaval(newsav, m, mhp); 2996 if (*errp) { 2997 KFREE(newsav), newsav = NULL; 2998 goto done; 2999 } 3000 } 3001 3002 /* reset created */ 3003 newsav->created = time_uptime; 3004 newsav->pid = mhp->msg->sadb_msg_pid; 3005 3006 /* add to satree */ 3007 newsav->sah = sah; 3008 newsav->refcnt = 1; 3009 newsav->state = SADB_SASTATE_LARVAL; 3010 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 3011 secasvar, chain); 3012 done: 3013 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3014 printf("DP key_newsav from %s:%u return SP:%p\n", 3015 where, tag, newsav)); 3016 3017 return newsav; 3018 } 3019 3020 /* 3021 * free() SA variable entry. 3022 */ 3023 static void 3024 key_delsav(struct secasvar *sav) 3025 { 3026 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav")); 3027 IPSEC_ASSERT(sav->refcnt == 0, 3028 ("key_delsav: reference count %u > 0", sav->refcnt)); 3029 3030 /* remove from SA header */ 3031 if (__LIST_CHAINED(sav)) 3032 LIST_REMOVE(sav, chain); 3033 3034 /* 3035 * Cleanup xform state. Note that zeroize'ing causes the 3036 * keys to be cleared; otherwise we must do it ourself. 3037 */ 3038 if (sav->tdb_xform != NULL) { 3039 sav->tdb_xform->xf_zeroize(sav); 3040 sav->tdb_xform = NULL; 3041 } else { 3042 if (sav->key_auth != NULL) 3043 memset(_KEYBUF(sav->key_auth), 0, _KEYLEN(sav->key_auth)); 3044 if (sav->key_enc != NULL) 3045 memset(_KEYBUF(sav->key_enc), 0, _KEYLEN(sav->key_enc)); 3046 } 3047 if (sav->key_auth != NULL) { 3048 KFREE(sav->key_auth); 3049 sav->key_auth = NULL; 3050 } 3051 if (sav->key_enc != NULL) { 3052 KFREE(sav->key_enc); 3053 sav->key_enc = NULL; 3054 } 3055 if (sav->sched) { 3056 memset(sav->sched, 0, sav->schedlen); 3057 KFREE(sav->sched); 3058 sav->sched = NULL; 3059 } 3060 if (sav->replay != NULL) { 3061 KFREE(sav->replay); 3062 sav->replay = NULL; 3063 } 3064 if (sav->lft_c != NULL) { 3065 KFREE(sav->lft_c); 3066 sav->lft_c = NULL; 3067 } 3068 if (sav->lft_h != NULL) { 3069 KFREE(sav->lft_h); 3070 sav->lft_h = NULL; 3071 } 3072 if (sav->lft_s != NULL) { 3073 KFREE(sav->lft_s); 3074 sav->lft_s = NULL; 3075 } 3076 3077 KFREE(sav); 3078 3079 return; 3080 } 3081 3082 /* 3083 * search SAD. 3084 * OUT: 3085 * NULL : not found 3086 * others : found, pointer to a SA. 3087 */ 3088 static struct secashead * 3089 key_getsah(const struct secasindex *saidx) 3090 { 3091 struct secashead *sah; 3092 3093 LIST_FOREACH(sah, &sahtree, chain) { 3094 if (sah->state == SADB_SASTATE_DEAD) 3095 continue; 3096 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3097 return sah; 3098 } 3099 3100 return NULL; 3101 } 3102 3103 /* 3104 * check not to be duplicated SPI. 3105 * NOTE: this function is too slow due to searching all SAD. 3106 * OUT: 3107 * NULL : not found 3108 * others : found, pointer to a SA. 3109 */ 3110 static struct secasvar * 3111 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3112 { 3113 struct secashead *sah; 3114 struct secasvar *sav; 3115 3116 /* check address family */ 3117 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3118 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3119 return NULL; 3120 } 3121 3122 /* check all SAD */ 3123 LIST_FOREACH(sah, &sahtree, chain) { 3124 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3125 continue; 3126 sav = key_getsavbyspi(sah, spi); 3127 if (sav != NULL) 3128 return sav; 3129 } 3130 3131 return NULL; 3132 } 3133 3134 /* 3135 * search SAD litmited alive SA, protocol, SPI. 3136 * OUT: 3137 * NULL : not found 3138 * others : found, pointer to a SA. 3139 */ 3140 static struct secasvar * 3141 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3142 { 3143 struct secasvar *sav; 3144 u_int stateidx, state; 3145 3146 /* search all status */ 3147 for (stateidx = 0; 3148 stateidx < _ARRAYLEN(saorder_state_alive); 3149 stateidx++) { 3150 3151 state = saorder_state_alive[stateidx]; 3152 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3153 3154 /* sanity check */ 3155 if (sav->state != state) { 3156 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3157 "invalid sav->state (queue: %d SA: %d)\n", 3158 state, sav->state)); 3159 continue; 3160 } 3161 3162 if (sav->spi == spi) 3163 return sav; 3164 } 3165 } 3166 3167 return NULL; 3168 } 3169 3170 /* 3171 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3172 * You must update these if need. 3173 * OUT: 0: success. 3174 * !0: failure. 3175 * 3176 * does not modify mbuf. does not free mbuf on error. 3177 */ 3178 static int 3179 key_setsaval(struct secasvar *sav, struct mbuf *m, 3180 const struct sadb_msghdr *mhp) 3181 { 3182 int error = 0; 3183 3184 /* sanity check */ 3185 if (m == NULL || mhp == NULL || mhp->msg == NULL) 3186 panic("key_setsaval: NULL pointer is passed"); 3187 3188 /* initialization */ 3189 sav->replay = NULL; 3190 sav->key_auth = NULL; 3191 sav->key_enc = NULL; 3192 sav->sched = NULL; 3193 sav->schedlen = 0; 3194 sav->lft_c = NULL; 3195 sav->lft_h = NULL; 3196 sav->lft_s = NULL; 3197 sav->tdb_xform = NULL; /* transform */ 3198 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3199 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3200 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3201 #ifdef IPSEC_NAT_T 3202 sav->natt_type = 0; 3203 sav->esp_frag = 0; 3204 #endif 3205 3206 /* SA */ 3207 if (mhp->ext[SADB_EXT_SA] != NULL) { 3208 const struct sadb_sa *sa0; 3209 3210 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3211 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3212 error = EINVAL; 3213 goto fail; 3214 } 3215 3216 sav->alg_auth = sa0->sadb_sa_auth; 3217 sav->alg_enc = sa0->sadb_sa_encrypt; 3218 sav->flags = sa0->sadb_sa_flags; 3219 3220 /* replay window */ 3221 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3222 sav->replay = (struct secreplay *) 3223 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3224 if (sav->replay == NULL) { 3225 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3226 error = ENOBUFS; 3227 goto fail; 3228 } 3229 if (sa0->sadb_sa_replay != 0) 3230 sav->replay->bitmap = (char*)(sav->replay+1); 3231 sav->replay->wsize = sa0->sadb_sa_replay; 3232 } 3233 } 3234 3235 /* Authentication keys */ 3236 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3237 const struct sadb_key *key0; 3238 int len; 3239 3240 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3241 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3242 3243 error = 0; 3244 if (len < sizeof(*key0)) { 3245 error = EINVAL; 3246 goto fail; 3247 } 3248 switch (mhp->msg->sadb_msg_satype) { 3249 case SADB_SATYPE_AH: 3250 case SADB_SATYPE_ESP: 3251 case SADB_X_SATYPE_TCPSIGNATURE: 3252 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3253 sav->alg_auth != SADB_X_AALG_NULL) 3254 error = EINVAL; 3255 break; 3256 case SADB_X_SATYPE_IPCOMP: 3257 default: 3258 error = EINVAL; 3259 break; 3260 } 3261 if (error) { 3262 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3263 goto fail; 3264 } 3265 3266 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3267 if (sav->key_auth == NULL) { 3268 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3269 error = ENOBUFS; 3270 goto fail; 3271 } 3272 } 3273 3274 /* Encryption key */ 3275 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3276 const struct sadb_key *key0; 3277 int len; 3278 3279 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3280 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3281 3282 error = 0; 3283 if (len < sizeof(*key0)) { 3284 error = EINVAL; 3285 goto fail; 3286 } 3287 switch (mhp->msg->sadb_msg_satype) { 3288 case SADB_SATYPE_ESP: 3289 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3290 sav->alg_enc != SADB_EALG_NULL) { 3291 error = EINVAL; 3292 break; 3293 } 3294 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3295 if (sav->key_enc == NULL) { 3296 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3297 error = ENOBUFS; 3298 goto fail; 3299 } 3300 break; 3301 case SADB_X_SATYPE_IPCOMP: 3302 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3303 error = EINVAL; 3304 sav->key_enc = NULL; /*just in case*/ 3305 break; 3306 case SADB_SATYPE_AH: 3307 case SADB_X_SATYPE_TCPSIGNATURE: 3308 default: 3309 error = EINVAL; 3310 break; 3311 } 3312 if (error) { 3313 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3314 goto fail; 3315 } 3316 } 3317 3318 /* set iv */ 3319 sav->ivlen = 0; 3320 3321 switch (mhp->msg->sadb_msg_satype) { 3322 case SADB_SATYPE_AH: 3323 error = xform_init(sav, XF_AH); 3324 break; 3325 case SADB_SATYPE_ESP: 3326 error = xform_init(sav, XF_ESP); 3327 break; 3328 case SADB_X_SATYPE_IPCOMP: 3329 error = xform_init(sav, XF_IPCOMP); 3330 break; 3331 case SADB_X_SATYPE_TCPSIGNATURE: 3332 error = xform_init(sav, XF_TCPSIGNATURE); 3333 break; 3334 } 3335 if (error) { 3336 ipseclog((LOG_DEBUG, 3337 "key_setsaval: unable to initialize SA type %u.\n", 3338 mhp->msg->sadb_msg_satype)); 3339 goto fail; 3340 } 3341 3342 /* reset created */ 3343 sav->created = time_uptime; 3344 3345 /* make lifetime for CURRENT */ 3346 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3347 sizeof(struct sadb_lifetime)); 3348 if (sav->lft_c == NULL) { 3349 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3350 error = ENOBUFS; 3351 goto fail; 3352 } 3353 3354 sav->lft_c->sadb_lifetime_len = 3355 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3356 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3357 sav->lft_c->sadb_lifetime_allocations = 0; 3358 sav->lft_c->sadb_lifetime_bytes = 0; 3359 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3360 sav->lft_c->sadb_lifetime_usetime = 0; 3361 3362 /* lifetimes for HARD and SOFT */ 3363 { 3364 const struct sadb_lifetime *lft0; 3365 3366 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3367 if (lft0 != NULL) { 3368 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3369 error = EINVAL; 3370 goto fail; 3371 } 3372 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3373 sizeof(*lft0)); 3374 if (sav->lft_h == 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 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3383 if (lft0 != NULL) { 3384 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3385 error = EINVAL; 3386 goto fail; 3387 } 3388 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3389 sizeof(*lft0)); 3390 if (sav->lft_s == NULL) { 3391 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3392 error = ENOBUFS; 3393 goto fail; 3394 } 3395 /* to be initialize ? */ 3396 } 3397 } 3398 3399 return 0; 3400 3401 fail: 3402 /* initialization */ 3403 if (sav->replay != NULL) { 3404 KFREE(sav->replay); 3405 sav->replay = NULL; 3406 } 3407 if (sav->key_auth != NULL) { 3408 KFREE(sav->key_auth); 3409 sav->key_auth = NULL; 3410 } 3411 if (sav->key_enc != NULL) { 3412 KFREE(sav->key_enc); 3413 sav->key_enc = NULL; 3414 } 3415 if (sav->sched) { 3416 KFREE(sav->sched); 3417 sav->sched = NULL; 3418 } 3419 if (sav->lft_c != NULL) { 3420 KFREE(sav->lft_c); 3421 sav->lft_c = NULL; 3422 } 3423 if (sav->lft_h != NULL) { 3424 KFREE(sav->lft_h); 3425 sav->lft_h = NULL; 3426 } 3427 if (sav->lft_s != NULL) { 3428 KFREE(sav->lft_s); 3429 sav->lft_s = NULL; 3430 } 3431 3432 return error; 3433 } 3434 3435 /* 3436 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3437 * OUT: 0: valid 3438 * other: errno 3439 */ 3440 static int 3441 key_mature(struct secasvar *sav) 3442 { 3443 int error; 3444 3445 /* check SPI value */ 3446 switch (sav->sah->saidx.proto) { 3447 case IPPROTO_ESP: 3448 case IPPROTO_AH: 3449 if (ntohl(sav->spi) <= 255) { 3450 ipseclog((LOG_DEBUG, 3451 "key_mature: illegal range of SPI %u.\n", 3452 (u_int32_t)ntohl(sav->spi))); 3453 return EINVAL; 3454 } 3455 break; 3456 } 3457 3458 /* check satype */ 3459 switch (sav->sah->saidx.proto) { 3460 case IPPROTO_ESP: 3461 /* check flags */ 3462 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3463 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3464 ipseclog((LOG_DEBUG, "key_mature: " 3465 "invalid flag (derived) given to old-esp.\n")); 3466 return EINVAL; 3467 } 3468 error = xform_init(sav, XF_ESP); 3469 break; 3470 case IPPROTO_AH: 3471 /* check flags */ 3472 if (sav->flags & SADB_X_EXT_DERIV) { 3473 ipseclog((LOG_DEBUG, "key_mature: " 3474 "invalid flag (derived) given to AH SA.\n")); 3475 return EINVAL; 3476 } 3477 if (sav->alg_enc != SADB_EALG_NONE) { 3478 ipseclog((LOG_DEBUG, "key_mature: " 3479 "protocol and algorithm mismated.\n")); 3480 return(EINVAL); 3481 } 3482 error = xform_init(sav, XF_AH); 3483 break; 3484 case IPPROTO_IPCOMP: 3485 if (sav->alg_auth != SADB_AALG_NONE) { 3486 ipseclog((LOG_DEBUG, "key_mature: " 3487 "protocol and algorithm mismated.\n")); 3488 return(EINVAL); 3489 } 3490 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3491 && ntohl(sav->spi) >= 0x10000) { 3492 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3493 return(EINVAL); 3494 } 3495 error = xform_init(sav, XF_IPCOMP); 3496 break; 3497 case IPPROTO_TCP: 3498 if (sav->alg_enc != SADB_EALG_NONE) { 3499 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3500 "mismated.\n", __func__)); 3501 return(EINVAL); 3502 } 3503 error = xform_init(sav, XF_TCPSIGNATURE); 3504 break; 3505 default: 3506 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3507 error = EPROTONOSUPPORT; 3508 break; 3509 } 3510 if (error == 0) 3511 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3512 return (error); 3513 } 3514 3515 /* 3516 * subroutine for SADB_GET and SADB_DUMP. 3517 */ 3518 static struct mbuf * 3519 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3520 u_int32_t seq, u_int32_t pid) 3521 { 3522 struct mbuf *result = NULL, *tres = NULL, *m; 3523 int l = 0; 3524 int i; 3525 void *p; 3526 struct sadb_lifetime lt; 3527 int dumporder[] = { 3528 SADB_EXT_SA, SADB_X_EXT_SA2, 3529 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3530 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3531 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3532 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3533 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3534 #ifdef IPSEC_NAT_T 3535 SADB_X_EXT_NAT_T_TYPE, 3536 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3537 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3538 SADB_X_EXT_NAT_T_FRAG, 3539 #endif 3540 3541 }; 3542 3543 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3544 if (m == NULL) 3545 goto fail; 3546 result = m; 3547 3548 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3549 m = NULL; 3550 p = NULL; 3551 switch (dumporder[i]) { 3552 case SADB_EXT_SA: 3553 m = key_setsadbsa(sav); 3554 break; 3555 3556 case SADB_X_EXT_SA2: 3557 m = key_setsadbxsa2(sav->sah->saidx.mode, 3558 sav->replay ? sav->replay->count : 0, 3559 sav->sah->saidx.reqid); 3560 break; 3561 3562 case SADB_EXT_ADDRESS_SRC: 3563 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3564 &sav->sah->saidx.src.sa, 3565 FULLMASK, IPSEC_ULPROTO_ANY); 3566 break; 3567 3568 case SADB_EXT_ADDRESS_DST: 3569 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3570 &sav->sah->saidx.dst.sa, 3571 FULLMASK, IPSEC_ULPROTO_ANY); 3572 break; 3573 3574 case SADB_EXT_KEY_AUTH: 3575 if (!sav->key_auth) 3576 continue; 3577 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3578 p = sav->key_auth; 3579 break; 3580 3581 case SADB_EXT_KEY_ENCRYPT: 3582 if (!sav->key_enc) 3583 continue; 3584 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3585 p = sav->key_enc; 3586 break; 3587 3588 case SADB_EXT_LIFETIME_CURRENT: 3589 if (!sav->lft_c) 3590 continue; 3591 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3592 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3593 lt.sadb_lifetime_addtime += time_second - time_uptime; 3594 lt.sadb_lifetime_usetime += time_second - time_uptime; 3595 p = < 3596 break; 3597 3598 case SADB_EXT_LIFETIME_HARD: 3599 if (!sav->lft_h) 3600 continue; 3601 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3602 p = sav->lft_h; 3603 break; 3604 3605 case SADB_EXT_LIFETIME_SOFT: 3606 if (!sav->lft_s) 3607 continue; 3608 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3609 p = sav->lft_s; 3610 break; 3611 3612 #ifdef IPSEC_NAT_T 3613 case SADB_X_EXT_NAT_T_TYPE: 3614 m = key_setsadbxtype(sav->natt_type); 3615 break; 3616 3617 case SADB_X_EXT_NAT_T_DPORT: 3618 if (sav->natt_type == 0) 3619 continue; 3620 m = key_setsadbxport( 3621 key_portfromsaddr(&sav->sah->saidx.dst), 3622 SADB_X_EXT_NAT_T_DPORT); 3623 break; 3624 3625 case SADB_X_EXT_NAT_T_SPORT: 3626 if (sav->natt_type == 0) 3627 continue; 3628 m = key_setsadbxport( 3629 key_portfromsaddr(&sav->sah->saidx.src), 3630 SADB_X_EXT_NAT_T_SPORT); 3631 break; 3632 3633 case SADB_X_EXT_NAT_T_OAI: 3634 case SADB_X_EXT_NAT_T_OAR: 3635 case SADB_X_EXT_NAT_T_FRAG: 3636 continue; 3637 #endif 3638 3639 case SADB_EXT_ADDRESS_PROXY: 3640 case SADB_EXT_IDENTITY_SRC: 3641 case SADB_EXT_IDENTITY_DST: 3642 /* XXX: should we brought from SPD ? */ 3643 case SADB_EXT_SENSITIVITY: 3644 default: 3645 continue; 3646 } 3647 3648 KASSERT(!(m && p)); 3649 if (!m && !p) 3650 goto fail; 3651 if (p && tres) { 3652 M_PREPEND(tres, l, M_DONTWAIT); 3653 if (!tres) 3654 goto fail; 3655 memcpy(mtod(tres, void *), p, l); 3656 continue; 3657 } 3658 if (p) { 3659 m = key_alloc_mbuf(l); 3660 if (!m) 3661 goto fail; 3662 m_copyback(m, 0, l, p); 3663 } 3664 3665 if (tres) 3666 m_cat(m, tres); 3667 tres = m; 3668 } 3669 3670 m_cat(result, tres); 3671 tres = NULL; /* avoid free on error below */ 3672 3673 if (result->m_len < sizeof(struct sadb_msg)) { 3674 result = m_pullup(result, sizeof(struct sadb_msg)); 3675 if (result == NULL) 3676 goto fail; 3677 } 3678 3679 result->m_pkthdr.len = 0; 3680 for (m = result; m; m = m->m_next) 3681 result->m_pkthdr.len += m->m_len; 3682 3683 mtod(result, struct sadb_msg *)->sadb_msg_len = 3684 PFKEY_UNIT64(result->m_pkthdr.len); 3685 3686 return result; 3687 3688 fail: 3689 m_freem(result); 3690 m_freem(tres); 3691 return NULL; 3692 } 3693 3694 3695 #ifdef IPSEC_NAT_T 3696 /* 3697 * set a type in sadb_x_nat_t_type 3698 */ 3699 static struct mbuf * 3700 key_setsadbxtype(u_int16_t type) 3701 { 3702 struct mbuf *m; 3703 size_t len; 3704 struct sadb_x_nat_t_type *p; 3705 3706 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3707 3708 m = key_alloc_mbuf(len); 3709 if (!m || m->m_next) { /*XXX*/ 3710 if (m) 3711 m_freem(m); 3712 return NULL; 3713 } 3714 3715 p = mtod(m, struct sadb_x_nat_t_type *); 3716 3717 memset(p, 0, len); 3718 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3719 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3720 p->sadb_x_nat_t_type_type = type; 3721 3722 return m; 3723 } 3724 /* 3725 * set a port in sadb_x_nat_t_port. port is in network order 3726 */ 3727 static struct mbuf * 3728 key_setsadbxport(u_int16_t port, u_int16_t type) 3729 { 3730 struct mbuf *m; 3731 size_t len; 3732 struct sadb_x_nat_t_port *p; 3733 3734 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3735 3736 m = key_alloc_mbuf(len); 3737 if (!m || m->m_next) { /*XXX*/ 3738 if (m) 3739 m_freem(m); 3740 return NULL; 3741 } 3742 3743 p = mtod(m, struct sadb_x_nat_t_port *); 3744 3745 memset(p, 0, len); 3746 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3747 p->sadb_x_nat_t_port_exttype = type; 3748 p->sadb_x_nat_t_port_port = port; 3749 3750 return m; 3751 } 3752 3753 /* 3754 * Get port from sockaddr, port is in network order 3755 */ 3756 u_int16_t 3757 key_portfromsaddr(const union sockaddr_union *saddr) 3758 { 3759 u_int16_t port; 3760 3761 switch (saddr->sa.sa_family) { 3762 case AF_INET: { 3763 port = saddr->sin.sin_port; 3764 break; 3765 } 3766 #ifdef INET6 3767 case AF_INET6: { 3768 port = saddr->sin6.sin6_port; 3769 break; 3770 } 3771 #endif 3772 default: 3773 printf("key_portfromsaddr: unexpected address family\n"); 3774 port = 0; 3775 break; 3776 } 3777 3778 return port; 3779 } 3780 3781 #endif /* IPSEC_NAT_T */ 3782 3783 /* 3784 * Set port is struct sockaddr. port is in network order 3785 */ 3786 static void 3787 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3788 { 3789 switch (saddr->sa.sa_family) { 3790 case AF_INET: { 3791 saddr->sin.sin_port = port; 3792 break; 3793 } 3794 #ifdef INET6 3795 case AF_INET6: { 3796 saddr->sin6.sin6_port = port; 3797 break; 3798 } 3799 #endif 3800 default: 3801 printf("key_porttosaddr: unexpected address family %d\n", 3802 saddr->sa.sa_family); 3803 break; 3804 } 3805 3806 return; 3807 } 3808 3809 /* 3810 * Safety check sa_len 3811 */ 3812 static int 3813 key_checksalen(const union sockaddr_union *saddr) 3814 { 3815 switch (saddr->sa.sa_family) { 3816 case AF_INET: 3817 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3818 return -1; 3819 break; 3820 #ifdef INET6 3821 case AF_INET6: 3822 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3823 return -1; 3824 break; 3825 #endif 3826 default: 3827 printf("key_checksalen: unexpected sa_family %d\n", 3828 saddr->sa.sa_family); 3829 return -1; 3830 break; 3831 } 3832 return 0; 3833 } 3834 3835 3836 /* 3837 * set data into sadb_msg. 3838 */ 3839 static struct mbuf * 3840 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3841 u_int32_t seq, pid_t pid, u_int16_t reserved) 3842 { 3843 struct mbuf *m; 3844 struct sadb_msg *p; 3845 int len; 3846 3847 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3848 if (len > MCLBYTES) 3849 return NULL; 3850 MGETHDR(m, M_DONTWAIT, MT_DATA); 3851 if (m && len > MHLEN) { 3852 MCLGET(m, M_DONTWAIT); 3853 if ((m->m_flags & M_EXT) == 0) { 3854 m_freem(m); 3855 m = NULL; 3856 } 3857 } 3858 if (!m) 3859 return NULL; 3860 m->m_pkthdr.len = m->m_len = len; 3861 m->m_next = NULL; 3862 3863 p = mtod(m, struct sadb_msg *); 3864 3865 memset(p, 0, len); 3866 p->sadb_msg_version = PF_KEY_V2; 3867 p->sadb_msg_type = type; 3868 p->sadb_msg_errno = 0; 3869 p->sadb_msg_satype = satype; 3870 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3871 p->sadb_msg_reserved = reserved; 3872 p->sadb_msg_seq = seq; 3873 p->sadb_msg_pid = (u_int32_t)pid; 3874 3875 return m; 3876 } 3877 3878 /* 3879 * copy secasvar data into sadb_address. 3880 */ 3881 static struct mbuf * 3882 key_setsadbsa(struct secasvar *sav) 3883 { 3884 struct mbuf *m; 3885 struct sadb_sa *p; 3886 int len; 3887 3888 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3889 m = key_alloc_mbuf(len); 3890 if (!m || m->m_next) { /*XXX*/ 3891 if (m) 3892 m_freem(m); 3893 return NULL; 3894 } 3895 3896 p = mtod(m, struct sadb_sa *); 3897 3898 memset(p, 0, len); 3899 p->sadb_sa_len = PFKEY_UNIT64(len); 3900 p->sadb_sa_exttype = SADB_EXT_SA; 3901 p->sadb_sa_spi = sav->spi; 3902 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3903 p->sadb_sa_state = sav->state; 3904 p->sadb_sa_auth = sav->alg_auth; 3905 p->sadb_sa_encrypt = sav->alg_enc; 3906 p->sadb_sa_flags = sav->flags; 3907 3908 return m; 3909 } 3910 3911 /* 3912 * set data into sadb_address. 3913 */ 3914 static struct mbuf * 3915 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3916 u_int8_t prefixlen, u_int16_t ul_proto) 3917 { 3918 struct mbuf *m; 3919 struct sadb_address *p; 3920 size_t len; 3921 3922 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3923 PFKEY_ALIGN8(saddr->sa_len); 3924 m = key_alloc_mbuf(len); 3925 if (!m || m->m_next) { /*XXX*/ 3926 if (m) 3927 m_freem(m); 3928 return NULL; 3929 } 3930 3931 p = mtod(m, struct sadb_address *); 3932 3933 memset(p, 0, len); 3934 p->sadb_address_len = PFKEY_UNIT64(len); 3935 p->sadb_address_exttype = exttype; 3936 p->sadb_address_proto = ul_proto; 3937 if (prefixlen == FULLMASK) { 3938 switch (saddr->sa_family) { 3939 case AF_INET: 3940 prefixlen = sizeof(struct in_addr) << 3; 3941 break; 3942 case AF_INET6: 3943 prefixlen = sizeof(struct in6_addr) << 3; 3944 break; 3945 default: 3946 ; /*XXX*/ 3947 } 3948 } 3949 p->sadb_address_prefixlen = prefixlen; 3950 p->sadb_address_reserved = 0; 3951 3952 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3953 saddr, saddr->sa_len); 3954 3955 return m; 3956 } 3957 3958 #if 0 3959 /* 3960 * set data into sadb_ident. 3961 */ 3962 static struct mbuf * 3963 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3964 void *string, int stringlen, u_int64_t id) 3965 { 3966 struct mbuf *m; 3967 struct sadb_ident *p; 3968 size_t len; 3969 3970 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3971 m = key_alloc_mbuf(len); 3972 if (!m || m->m_next) { /*XXX*/ 3973 if (m) 3974 m_freem(m); 3975 return NULL; 3976 } 3977 3978 p = mtod(m, struct sadb_ident *); 3979 3980 memset(p, 0, len); 3981 p->sadb_ident_len = PFKEY_UNIT64(len); 3982 p->sadb_ident_exttype = exttype; 3983 p->sadb_ident_type = idtype; 3984 p->sadb_ident_reserved = 0; 3985 p->sadb_ident_id = id; 3986 3987 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3988 string, stringlen); 3989 3990 return m; 3991 } 3992 #endif 3993 3994 /* 3995 * set data into sadb_x_sa2. 3996 */ 3997 static struct mbuf * 3998 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 3999 { 4000 struct mbuf *m; 4001 struct sadb_x_sa2 *p; 4002 size_t len; 4003 4004 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4005 m = key_alloc_mbuf(len); 4006 if (!m || m->m_next) { /*XXX*/ 4007 if (m) 4008 m_freem(m); 4009 return NULL; 4010 } 4011 4012 p = mtod(m, struct sadb_x_sa2 *); 4013 4014 memset(p, 0, len); 4015 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4016 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4017 p->sadb_x_sa2_mode = mode; 4018 p->sadb_x_sa2_reserved1 = 0; 4019 p->sadb_x_sa2_reserved2 = 0; 4020 p->sadb_x_sa2_sequence = seq; 4021 p->sadb_x_sa2_reqid = reqid; 4022 4023 return m; 4024 } 4025 4026 /* 4027 * set data into sadb_x_policy 4028 */ 4029 static struct mbuf * 4030 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 4031 { 4032 struct mbuf *m; 4033 struct sadb_x_policy *p; 4034 size_t len; 4035 4036 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4037 m = key_alloc_mbuf(len); 4038 if (!m || m->m_next) { /*XXX*/ 4039 if (m) 4040 m_freem(m); 4041 return NULL; 4042 } 4043 4044 p = mtod(m, struct sadb_x_policy *); 4045 4046 memset(p, 0, len); 4047 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4048 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4049 p->sadb_x_policy_type = type; 4050 p->sadb_x_policy_dir = dir; 4051 p->sadb_x_policy_id = id; 4052 4053 return m; 4054 } 4055 4056 /* %%% utilities */ 4057 /* 4058 * copy a buffer into the new buffer allocated. 4059 */ 4060 static void * 4061 key_newbuf(const void *src, u_int len) 4062 { 4063 void *new; 4064 4065 KMALLOC(new, void *, len); 4066 if (new == NULL) { 4067 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 4068 return NULL; 4069 } 4070 memcpy(new, src, len); 4071 4072 return new; 4073 } 4074 4075 /* compare my own address 4076 * OUT: 1: true, i.e. my address. 4077 * 0: false 4078 */ 4079 int 4080 key_ismyaddr(const struct sockaddr *sa) 4081 { 4082 #ifdef INET 4083 const struct sockaddr_in *sin; 4084 const struct in_ifaddr *ia; 4085 #endif 4086 4087 /* sanity check */ 4088 if (sa == NULL) 4089 panic("key_ismyaddr: NULL pointer is passed"); 4090 4091 switch (sa->sa_family) { 4092 #ifdef INET 4093 case AF_INET: 4094 sin = (const struct sockaddr_in *)sa; 4095 for (ia = in_ifaddrhead.tqh_first; ia; 4096 ia = ia->ia_link.tqe_next) 4097 { 4098 if (sin->sin_family == ia->ia_addr.sin_family && 4099 sin->sin_len == ia->ia_addr.sin_len && 4100 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4101 { 4102 return 1; 4103 } 4104 } 4105 break; 4106 #endif 4107 #ifdef INET6 4108 case AF_INET6: 4109 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4110 #endif 4111 } 4112 4113 return 0; 4114 } 4115 4116 #ifdef INET6 4117 /* 4118 * compare my own address for IPv6. 4119 * 1: ours 4120 * 0: other 4121 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4122 */ 4123 #include <netinet6/in6_var.h> 4124 4125 static int 4126 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4127 { 4128 const struct in6_ifaddr *ia; 4129 const struct in6_multi *in6m; 4130 4131 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 4132 if (key_sockaddrcmp((const struct sockaddr *)&sin6, 4133 (const struct sockaddr *)&ia->ia_addr, 0) == 0) 4134 return 1; 4135 4136 /* 4137 * XXX Multicast 4138 * XXX why do we care about multlicast here while we don't care 4139 * about IPv4 multicast?? 4140 * XXX scope 4141 */ 4142 in6m = NULL; 4143 #ifdef __FreeBSD__ 4144 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 4145 #else 4146 for ((in6m) = ia->ia6_multiaddrs.lh_first; 4147 (in6m) != NULL && 4148 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); 4149 (in6m) = in6m->in6m_entry.le_next) 4150 continue; 4151 #endif 4152 if (in6m) 4153 return 1; 4154 } 4155 4156 /* loopback, just for safety */ 4157 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4158 return 1; 4159 4160 return 0; 4161 } 4162 #endif /*INET6*/ 4163 4164 /* 4165 * compare two secasindex structure. 4166 * flag can specify to compare 2 saidxes. 4167 * compare two secasindex structure without both mode and reqid. 4168 * don't compare port. 4169 * IN: 4170 * saidx0: source, it can be in SAD. 4171 * saidx1: object. 4172 * OUT: 4173 * 1 : equal 4174 * 0 : not equal 4175 */ 4176 static int 4177 key_cmpsaidx( 4178 const struct secasindex *saidx0, 4179 const struct secasindex *saidx1, 4180 int flag) 4181 { 4182 int chkport = 0; 4183 4184 /* sanity */ 4185 if (saidx0 == NULL && saidx1 == NULL) 4186 return 1; 4187 4188 if (saidx0 == NULL || saidx1 == NULL) 4189 return 0; 4190 4191 if (saidx0->proto != saidx1->proto) 4192 return 0; 4193 4194 if (flag == CMP_EXACTLY) { 4195 if (saidx0->mode != saidx1->mode) 4196 return 0; 4197 if (saidx0->reqid != saidx1->reqid) 4198 return 0; 4199 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4200 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4201 return 0; 4202 } else { 4203 4204 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4205 if (flag == CMP_MODE_REQID 4206 ||flag == CMP_REQID) { 4207 /* 4208 * If reqid of SPD is non-zero, unique SA is required. 4209 * The result must be of same reqid in this case. 4210 */ 4211 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4212 return 0; 4213 } 4214 4215 if (flag == CMP_MODE_REQID) { 4216 if (saidx0->mode != IPSEC_MODE_ANY 4217 && saidx0->mode != saidx1->mode) 4218 return 0; 4219 } 4220 4221 /* 4222 * If NAT-T is enabled, check ports for tunnel mode. 4223 * Don't do it for transport mode, as there is no 4224 * port information available in the SP. 4225 * Also don't check ports if they are set to zero 4226 * in the SPD: This means we have a non-generated 4227 * SPD which can't know UDP ports. 4228 */ 4229 #ifdef IPSEC_NAT_T 4230 if (saidx1->mode == IPSEC_MODE_TUNNEL && 4231 ((((const struct sockaddr *)(&saidx1->src))->sa_family == AF_INET && 4232 ((const struct sockaddr *)(&saidx1->dst))->sa_family == AF_INET && 4233 ((const struct sockaddr_in *)(&saidx1->src))->sin_port && 4234 ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) || 4235 (((const struct sockaddr *)(&saidx1->src))->sa_family == AF_INET6 && 4236 ((const struct sockaddr *)(&saidx1->dst))->sa_family == AF_INET6 && 4237 ((const struct sockaddr_in6 *)(&saidx1->src))->sin6_port && 4238 ((const struct sockaddr_in6 *)(&saidx1->dst))->sin6_port))) 4239 chkport = 1; 4240 #endif 4241 4242 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4243 return 0; 4244 } 4245 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4246 return 0; 4247 } 4248 } 4249 4250 return 1; 4251 } 4252 4253 /* 4254 * compare two secindex structure exactly. 4255 * IN: 4256 * spidx0: source, it is often in SPD. 4257 * spidx1: object, it is often from PFKEY message. 4258 * OUT: 4259 * 1 : equal 4260 * 0 : not equal 4261 */ 4262 int 4263 key_cmpspidx_exactly( 4264 const struct secpolicyindex *spidx0, 4265 const struct secpolicyindex *spidx1) 4266 { 4267 /* sanity */ 4268 if (spidx0 == NULL && spidx1 == NULL) 4269 return 1; 4270 4271 if (spidx0 == NULL || spidx1 == NULL) 4272 return 0; 4273 4274 if (spidx0->prefs != spidx1->prefs 4275 || spidx0->prefd != spidx1->prefd 4276 || spidx0->ul_proto != spidx1->ul_proto) 4277 return 0; 4278 4279 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4280 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4281 } 4282 4283 /* 4284 * compare two secindex structure with mask. 4285 * IN: 4286 * spidx0: source, it is often in SPD. 4287 * spidx1: object, it is often from IP header. 4288 * OUT: 4289 * 1 : equal 4290 * 0 : not equal 4291 */ 4292 int 4293 key_cmpspidx_withmask( 4294 const struct secpolicyindex *spidx0, 4295 const struct secpolicyindex *spidx1) 4296 { 4297 /* sanity */ 4298 if (spidx0 == NULL && spidx1 == NULL) 4299 return 1; 4300 4301 if (spidx0 == NULL || spidx1 == NULL) 4302 return 0; 4303 4304 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4305 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4306 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4307 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4308 return 0; 4309 4310 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4311 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4312 && spidx0->ul_proto != spidx1->ul_proto) 4313 return 0; 4314 4315 switch (spidx0->src.sa.sa_family) { 4316 case AF_INET: 4317 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4318 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4319 return 0; 4320 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4321 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4322 return 0; 4323 break; 4324 case AF_INET6: 4325 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4326 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4327 return 0; 4328 /* 4329 * scope_id check. if sin6_scope_id is 0, we regard it 4330 * as a wildcard scope, which matches any scope zone ID. 4331 */ 4332 if (spidx0->src.sin6.sin6_scope_id && 4333 spidx1->src.sin6.sin6_scope_id && 4334 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4335 return 0; 4336 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4337 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4338 return 0; 4339 break; 4340 default: 4341 /* XXX */ 4342 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4343 return 0; 4344 break; 4345 } 4346 4347 switch (spidx0->dst.sa.sa_family) { 4348 case AF_INET: 4349 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4350 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4351 return 0; 4352 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4353 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4354 return 0; 4355 break; 4356 case AF_INET6: 4357 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4358 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4359 return 0; 4360 /* 4361 * scope_id check. if sin6_scope_id is 0, we regard it 4362 * as a wildcard scope, which matches any scope zone ID. 4363 */ 4364 if (spidx0->src.sin6.sin6_scope_id && 4365 spidx1->src.sin6.sin6_scope_id && 4366 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4367 return 0; 4368 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4369 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4370 return 0; 4371 break; 4372 default: 4373 /* XXX */ 4374 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4375 return 0; 4376 break; 4377 } 4378 4379 /* XXX Do we check other field ? e.g. flowinfo */ 4380 4381 return 1; 4382 } 4383 4384 /* returns 0 on match */ 4385 static int 4386 key_sockaddrcmp( 4387 const struct sockaddr *sa1, 4388 const struct sockaddr *sa2, 4389 int port) 4390 { 4391 #ifdef satosin 4392 #undef satosin 4393 #endif 4394 #define satosin(s) ((const struct sockaddr_in *)s) 4395 #ifdef satosin6 4396 #undef satosin6 4397 #endif 4398 #define satosin6(s) ((const struct sockaddr_in6 *)s) 4399 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4400 return 1; 4401 4402 switch (sa1->sa_family) { 4403 case AF_INET: 4404 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4405 return 1; 4406 if (satosin(sa1)->sin_addr.s_addr != 4407 satosin(sa2)->sin_addr.s_addr) { 4408 return 1; 4409 } 4410 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4411 return 1; 4412 break; 4413 case AF_INET6: 4414 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4415 return 1; /*EINVAL*/ 4416 if (satosin6(sa1)->sin6_scope_id != 4417 satosin6(sa2)->sin6_scope_id) { 4418 return 1; 4419 } 4420 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4421 &satosin6(sa2)->sin6_addr)) { 4422 return 1; 4423 } 4424 if (port && 4425 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4426 return 1; 4427 } 4428 break; 4429 default: 4430 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4431 return 1; 4432 break; 4433 } 4434 4435 return 0; 4436 #undef satosin 4437 #undef satosin6 4438 } 4439 4440 /* 4441 * compare two buffers with mask. 4442 * IN: 4443 * addr1: source 4444 * addr2: object 4445 * bits: Number of bits to compare 4446 * OUT: 4447 * 1 : equal 4448 * 0 : not equal 4449 */ 4450 static int 4451 key_bbcmp(const void *a1, const void *a2, u_int bits) 4452 { 4453 const unsigned char *p1 = a1; 4454 const unsigned char *p2 = a2; 4455 4456 /* XXX: This could be considerably faster if we compare a word 4457 * at a time, but it is complicated on LSB Endian machines */ 4458 4459 /* Handle null pointers */ 4460 if (p1 == NULL || p2 == NULL) 4461 return (p1 == p2); 4462 4463 while (bits >= 8) { 4464 if (*p1++ != *p2++) 4465 return 0; 4466 bits -= 8; 4467 } 4468 4469 if (bits > 0) { 4470 u_int8_t mask = ~((1<<(8-bits))-1); 4471 if ((*p1 & mask) != (*p2 & mask)) 4472 return 0; 4473 } 4474 return 1; /* Match! */ 4475 } 4476 4477 /* 4478 * time handler. 4479 * scanning SPD and SAD to check status for each entries, 4480 * and do to remove or to expire. 4481 */ 4482 void 4483 key_timehandler(void* arg) 4484 { 4485 u_int dir; 4486 int s; 4487 time_t now = time_uptime; 4488 4489 s = splsoftnet(); /*called from softclock()*/ 4490 mutex_enter(softnet_lock); 4491 4492 /* SPD */ 4493 { 4494 struct secpolicy *sp, *nextsp; 4495 4496 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4497 for (sp = LIST_FIRST(&sptree[dir]); 4498 sp != NULL; 4499 sp = nextsp) { 4500 4501 nextsp = LIST_NEXT(sp, chain); 4502 4503 if (sp->state == IPSEC_SPSTATE_DEAD) { 4504 key_sp_unlink(sp); /*XXX*/ 4505 4506 /* 'sp' dead; continue transfers to 4507 * 'sp = nextsp' 4508 */ 4509 continue; 4510 } 4511 4512 if (sp->lifetime == 0 && sp->validtime == 0) 4513 continue; 4514 4515 /* the deletion will occur next time */ 4516 if ((sp->lifetime && now - sp->created > sp->lifetime) 4517 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4518 key_sp_dead(sp); 4519 key_spdexpire(sp); 4520 continue; 4521 } 4522 } 4523 } 4524 } 4525 4526 /* SAD */ 4527 { 4528 struct secashead *sah, *nextsah; 4529 struct secasvar *sav, *nextsav; 4530 4531 for (sah = LIST_FIRST(&sahtree); 4532 sah != NULL; 4533 sah = nextsah) { 4534 4535 nextsah = LIST_NEXT(sah, chain); 4536 4537 /* if sah has been dead, then delete it and process next sah. */ 4538 if (sah->state == SADB_SASTATE_DEAD) { 4539 key_delsah(sah); 4540 continue; 4541 } 4542 4543 /* if LARVAL entry doesn't become MATURE, delete it. */ 4544 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4545 sav != NULL; 4546 sav = nextsav) { 4547 4548 nextsav = LIST_NEXT(sav, chain); 4549 4550 if (now - sav->created > key_larval_lifetime) { 4551 KEY_FREESAV(&sav); 4552 } 4553 } 4554 4555 /* 4556 * check MATURE entry to start to send expire message 4557 * whether or not. 4558 */ 4559 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4560 sav != NULL; 4561 sav = nextsav) { 4562 4563 nextsav = LIST_NEXT(sav, chain); 4564 4565 /* we don't need to check. */ 4566 if (sav->lft_s == NULL) 4567 continue; 4568 4569 /* sanity check */ 4570 if (sav->lft_c == NULL) { 4571 ipseclog((LOG_DEBUG,"key_timehandler: " 4572 "There is no CURRENT time, why?\n")); 4573 continue; 4574 } 4575 4576 /* check SOFT lifetime */ 4577 if (sav->lft_s->sadb_lifetime_addtime != 0 4578 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4579 /* 4580 * check SA to be used whether or not. 4581 * when SA hasn't been used, delete it. 4582 */ 4583 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4584 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4585 KEY_FREESAV(&sav); 4586 } else { 4587 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4588 /* 4589 * XXX If we keep to send expire 4590 * message in the status of 4591 * DYING. Do remove below code. 4592 */ 4593 key_expire(sav); 4594 } 4595 } 4596 /* check SOFT lifetime by bytes */ 4597 /* 4598 * XXX I don't know the way to delete this SA 4599 * when new SA is installed. Caution when it's 4600 * installed too big lifetime by time. 4601 */ 4602 else if (sav->lft_s->sadb_lifetime_bytes != 0 4603 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4604 4605 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4606 /* 4607 * XXX If we keep to send expire 4608 * message in the status of 4609 * DYING. Do remove below code. 4610 */ 4611 key_expire(sav); 4612 } 4613 } 4614 4615 /* check DYING entry to change status to DEAD. */ 4616 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4617 sav != NULL; 4618 sav = nextsav) { 4619 4620 nextsav = LIST_NEXT(sav, chain); 4621 4622 /* we don't need to check. */ 4623 if (sav->lft_h == NULL) 4624 continue; 4625 4626 /* sanity check */ 4627 if (sav->lft_c == NULL) { 4628 ipseclog((LOG_DEBUG, "key_timehandler: " 4629 "There is no CURRENT time, why?\n")); 4630 continue; 4631 } 4632 4633 if (sav->lft_h->sadb_lifetime_addtime != 0 4634 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4635 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4636 KEY_FREESAV(&sav); 4637 } 4638 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4639 else if (sav->lft_s != NULL 4640 && sav->lft_s->sadb_lifetime_addtime != 0 4641 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4642 /* 4643 * XXX: should be checked to be 4644 * installed the valid SA. 4645 */ 4646 4647 /* 4648 * If there is no SA then sending 4649 * expire message. 4650 */ 4651 key_expire(sav); 4652 } 4653 #endif 4654 /* check HARD lifetime by bytes */ 4655 else if (sav->lft_h->sadb_lifetime_bytes != 0 4656 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4657 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4658 KEY_FREESAV(&sav); 4659 } 4660 } 4661 4662 /* delete entry in DEAD */ 4663 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4664 sav != NULL; 4665 sav = nextsav) { 4666 4667 nextsav = LIST_NEXT(sav, chain); 4668 4669 /* sanity check */ 4670 if (sav->state != SADB_SASTATE_DEAD) { 4671 ipseclog((LOG_DEBUG, "key_timehandler: " 4672 "invalid sav->state " 4673 "(queue: %d SA: %d): " 4674 "kill it anyway\n", 4675 SADB_SASTATE_DEAD, sav->state)); 4676 } 4677 4678 /* 4679 * do not call key_freesav() here. 4680 * sav should already be freed, and sav->refcnt 4681 * shows other references to sav 4682 * (such as from SPD). 4683 */ 4684 } 4685 } 4686 } 4687 4688 #ifndef IPSEC_NONBLOCK_ACQUIRE 4689 /* ACQ tree */ 4690 { 4691 struct secacq *acq, *nextacq; 4692 4693 for (acq = LIST_FIRST(&acqtree); 4694 acq != NULL; 4695 acq = nextacq) { 4696 4697 nextacq = LIST_NEXT(acq, chain); 4698 4699 if (now - acq->created > key_blockacq_lifetime 4700 && __LIST_CHAINED(acq)) { 4701 LIST_REMOVE(acq, chain); 4702 KFREE(acq); 4703 } 4704 } 4705 } 4706 #endif 4707 4708 /* SP ACQ tree */ 4709 { 4710 struct secspacq *acq, *nextacq; 4711 4712 for (acq = LIST_FIRST(&spacqtree); 4713 acq != NULL; 4714 acq = nextacq) { 4715 4716 nextacq = LIST_NEXT(acq, chain); 4717 4718 if (now - acq->created > key_blockacq_lifetime 4719 && __LIST_CHAINED(acq)) { 4720 LIST_REMOVE(acq, chain); 4721 KFREE(acq); 4722 } 4723 } 4724 } 4725 4726 /* initialize random seed */ 4727 if (key_tick_init_random++ > key_int_random) { 4728 key_tick_init_random = 0; 4729 key_srandom(); 4730 } 4731 4732 #ifndef IPSEC_DEBUG2 4733 /* do exchange to tick time !! */ 4734 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4735 #endif /* IPSEC_DEBUG2 */ 4736 4737 mutex_exit(softnet_lock); 4738 splx(s); 4739 return; 4740 } 4741 4742 #ifdef __NetBSD__ 4743 void srandom(int); 4744 void srandom(int arg) {return;} 4745 #endif 4746 4747 /* 4748 * to initialize a seed for random() 4749 */ 4750 static void 4751 key_srandom(void) 4752 { 4753 srandom(time_second); 4754 } 4755 4756 u_long 4757 key_random(void) 4758 { 4759 u_long value; 4760 4761 key_randomfill(&value, sizeof(value)); 4762 return value; 4763 } 4764 4765 void 4766 key_randomfill(void *p, size_t l) 4767 { 4768 size_t n; 4769 u_long v; 4770 static int warn = 1; 4771 4772 n = 0; 4773 n = (size_t)read_random(p, (u_int)l); 4774 /* last resort */ 4775 while (n < l) { 4776 v = random(); 4777 memcpy((u_int8_t *)p + n, &v, 4778 l - n < sizeof(v) ? l - n : sizeof(v)); 4779 n += sizeof(v); 4780 4781 if (warn) { 4782 printf("WARNING: pseudo-random number generator " 4783 "used for IPsec processing\n"); 4784 warn = 0; 4785 } 4786 } 4787 } 4788 4789 /* 4790 * map SADB_SATYPE_* to IPPROTO_*. 4791 * if satype == SADB_SATYPE then satype is mapped to ~0. 4792 * OUT: 4793 * 0: invalid satype. 4794 */ 4795 static u_int16_t 4796 key_satype2proto(u_int8_t satype) 4797 { 4798 switch (satype) { 4799 case SADB_SATYPE_UNSPEC: 4800 return IPSEC_PROTO_ANY; 4801 case SADB_SATYPE_AH: 4802 return IPPROTO_AH; 4803 case SADB_SATYPE_ESP: 4804 return IPPROTO_ESP; 4805 case SADB_X_SATYPE_IPCOMP: 4806 return IPPROTO_IPCOMP; 4807 case SADB_X_SATYPE_TCPSIGNATURE: 4808 return IPPROTO_TCP; 4809 default: 4810 return 0; 4811 } 4812 /* NOTREACHED */ 4813 } 4814 4815 /* 4816 * map IPPROTO_* to SADB_SATYPE_* 4817 * OUT: 4818 * 0: invalid protocol type. 4819 */ 4820 static u_int8_t 4821 key_proto2satype(u_int16_t proto) 4822 { 4823 switch (proto) { 4824 case IPPROTO_AH: 4825 return SADB_SATYPE_AH; 4826 case IPPROTO_ESP: 4827 return SADB_SATYPE_ESP; 4828 case IPPROTO_IPCOMP: 4829 return SADB_X_SATYPE_IPCOMP; 4830 case IPPROTO_TCP: 4831 return SADB_X_SATYPE_TCPSIGNATURE; 4832 default: 4833 return 0; 4834 } 4835 /* NOTREACHED */ 4836 } 4837 4838 static int 4839 key_setsecasidx(int proto, int mode, int reqid, 4840 const struct sadb_address * src, 4841 const struct sadb_address * dst, 4842 struct secasindex * saidx) 4843 { 4844 const union sockaddr_union * src_u = 4845 (const union sockaddr_union *) src; 4846 const union sockaddr_union * dst_u = 4847 (const union sockaddr_union *) dst; 4848 4849 /* sa len safety check */ 4850 if (key_checksalen(src_u) != 0) 4851 return -1; 4852 if (key_checksalen(dst_u) != 0) 4853 return -1; 4854 4855 memset(saidx, 0, sizeof(*saidx)); 4856 saidx->proto = proto; 4857 saidx->mode = mode; 4858 saidx->reqid = reqid; 4859 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4860 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4861 4862 #ifndef IPSEC_NAT_T 4863 key_porttosaddr(&((saidx)->src),0); 4864 key_porttosaddr(&((saidx)->dst),0); 4865 #endif 4866 return 0; 4867 } 4868 4869 /* %%% PF_KEY */ 4870 /* 4871 * SADB_GETSPI processing is to receive 4872 * <base, (SA2), src address, dst address, (SPI range)> 4873 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4874 * tree with the status of LARVAL, and send 4875 * <base, SA(*), address(SD)> 4876 * to the IKMPd. 4877 * 4878 * IN: mhp: pointer to the pointer to each header. 4879 * OUT: NULL if fail. 4880 * other if success, return pointer to the message to send. 4881 */ 4882 static int 4883 key_getspi(struct socket *so, struct mbuf *m, 4884 const struct sadb_msghdr *mhp) 4885 { 4886 struct sadb_address *src0, *dst0; 4887 struct secasindex saidx; 4888 struct secashead *newsah; 4889 struct secasvar *newsav; 4890 u_int8_t proto; 4891 u_int32_t spi; 4892 u_int8_t mode; 4893 u_int16_t reqid; 4894 int error; 4895 4896 /* sanity check */ 4897 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4898 panic("key_getspi: NULL pointer is passed"); 4899 4900 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4901 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4902 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4903 return key_senderror(so, m, EINVAL); 4904 } 4905 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4906 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4907 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4908 return key_senderror(so, m, EINVAL); 4909 } 4910 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4911 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4912 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4913 } else { 4914 mode = IPSEC_MODE_ANY; 4915 reqid = 0; 4916 } 4917 4918 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4919 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4920 4921 /* map satype to proto */ 4922 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4923 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4924 return key_senderror(so, m, EINVAL); 4925 } 4926 4927 4928 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 4929 dst0 + 1, &saidx)) != 0) 4930 return key_senderror(so, m, EINVAL); 4931 4932 #ifdef IPSEC_NAT_T 4933 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 4934 return key_senderror(so, m, EINVAL); 4935 #endif 4936 4937 /* SPI allocation */ 4938 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4939 &saidx); 4940 if (spi == 0) 4941 return key_senderror(so, m, EINVAL); 4942 4943 /* get a SA index */ 4944 if ((newsah = key_getsah(&saidx)) == NULL) { 4945 /* create a new SA index */ 4946 if ((newsah = key_newsah(&saidx)) == NULL) { 4947 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4948 return key_senderror(so, m, ENOBUFS); 4949 } 4950 } 4951 4952 /* get a new SA */ 4953 /* XXX rewrite */ 4954 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4955 if (newsav == NULL) { 4956 /* XXX don't free new SA index allocated in above. */ 4957 return key_senderror(so, m, error); 4958 } 4959 4960 /* set spi */ 4961 newsav->spi = htonl(spi); 4962 4963 #ifndef IPSEC_NONBLOCK_ACQUIRE 4964 /* delete the entry in acqtree */ 4965 if (mhp->msg->sadb_msg_seq != 0) { 4966 struct secacq *acq; 4967 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4968 /* reset counter in order to deletion by timehandler. */ 4969 acq->created = time_uptime; 4970 acq->count = 0; 4971 } 4972 } 4973 #endif 4974 4975 { 4976 struct mbuf *n, *nn; 4977 struct sadb_sa *m_sa; 4978 struct sadb_msg *newmsg; 4979 int off, len; 4980 4981 /* create new sadb_msg to reply. */ 4982 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4983 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4984 if (len > MCLBYTES) 4985 return key_senderror(so, m, ENOBUFS); 4986 4987 MGETHDR(n, M_DONTWAIT, MT_DATA); 4988 if (len > MHLEN) { 4989 MCLGET(n, M_DONTWAIT); 4990 if ((n->m_flags & M_EXT) == 0) { 4991 m_freem(n); 4992 n = NULL; 4993 } 4994 } 4995 if (!n) 4996 return key_senderror(so, m, ENOBUFS); 4997 4998 n->m_len = len; 4999 n->m_next = NULL; 5000 off = 0; 5001 5002 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 5003 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 5004 5005 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 5006 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 5007 m_sa->sadb_sa_exttype = SADB_EXT_SA; 5008 m_sa->sadb_sa_spi = htonl(spi); 5009 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5010 5011 #ifdef DIAGNOSTIC 5012 if (off != len) 5013 panic("length inconsistency in key_getspi"); 5014 #endif 5015 5016 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 5017 SADB_EXT_ADDRESS_DST); 5018 if (!n->m_next) { 5019 m_freem(n); 5020 return key_senderror(so, m, ENOBUFS); 5021 } 5022 5023 if (n->m_len < sizeof(struct sadb_msg)) { 5024 n = m_pullup(n, sizeof(struct sadb_msg)); 5025 if (n == NULL) 5026 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 5027 } 5028 5029 n->m_pkthdr.len = 0; 5030 for (nn = n; nn; nn = nn->m_next) 5031 n->m_pkthdr.len += nn->m_len; 5032 5033 newmsg = mtod(n, struct sadb_msg *); 5034 newmsg->sadb_msg_seq = newsav->seq; 5035 newmsg->sadb_msg_errno = 0; 5036 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5037 5038 m_freem(m); 5039 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5040 } 5041 } 5042 5043 /* 5044 * allocating new SPI 5045 * called by key_getspi(). 5046 * OUT: 5047 * 0: failure. 5048 * others: success. 5049 */ 5050 static u_int32_t 5051 key_do_getnewspi(const struct sadb_spirange *spirange, 5052 const struct secasindex *saidx) 5053 { 5054 u_int32_t newspi; 5055 u_int32_t spmin, spmax; 5056 int count = key_spi_trycnt; 5057 5058 /* set spi range to allocate */ 5059 if (spirange != NULL) { 5060 spmin = spirange->sadb_spirange_min; 5061 spmax = spirange->sadb_spirange_max; 5062 } else { 5063 spmin = key_spi_minval; 5064 spmax = key_spi_maxval; 5065 } 5066 /* IPCOMP needs 2-byte SPI */ 5067 if (saidx->proto == IPPROTO_IPCOMP) { 5068 u_int32_t t; 5069 if (spmin >= 0x10000) 5070 spmin = 0xffff; 5071 if (spmax >= 0x10000) 5072 spmax = 0xffff; 5073 if (spmin > spmax) { 5074 t = spmin; spmin = spmax; spmax = t; 5075 } 5076 } 5077 5078 if (spmin == spmax) { 5079 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5080 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 5081 return 0; 5082 } 5083 5084 count--; /* taking one cost. */ 5085 newspi = spmin; 5086 5087 } else { 5088 5089 /* init SPI */ 5090 newspi = 0; 5091 5092 /* when requesting to allocate spi ranged */ 5093 while (count--) { 5094 /* generate pseudo-random SPI value ranged. */ 5095 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5096 5097 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5098 break; 5099 } 5100 5101 if (count == 0 || newspi == 0) { 5102 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 5103 return 0; 5104 } 5105 } 5106 5107 /* statistics */ 5108 keystat.getspi_count = 5109 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5110 5111 return newspi; 5112 } 5113 5114 #ifdef IPSEC_NAT_T 5115 /* Handle IPSEC_NAT_T info if present */ 5116 static int 5117 key_handle_natt_info(struct secasvar *sav, 5118 const struct sadb_msghdr *mhp) 5119 { 5120 5121 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5122 ipseclog((LOG_DEBUG,"update: NAT-T OAi present\n")); 5123 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5124 ipseclog((LOG_DEBUG,"update: NAT-T OAr present\n")); 5125 5126 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5127 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5128 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5129 struct sadb_x_nat_t_type *type; 5130 struct sadb_x_nat_t_port *sport; 5131 struct sadb_x_nat_t_port *dport; 5132 struct sadb_address *iaddr, *raddr; 5133 struct sadb_x_nat_t_frag *frag; 5134 5135 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5136 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5137 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5138 ipseclog((LOG_DEBUG, "key_update: " 5139 "invalid message.\n")); 5140 return -1; 5141 } 5142 5143 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 5144 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 5145 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5146 return -1; 5147 } 5148 5149 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 5150 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 5151 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5152 return -1; 5153 } 5154 5155 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 5156 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 5157 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5158 return -1; 5159 } 5160 5161 type = (struct sadb_x_nat_t_type *) 5162 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5163 sport = (struct sadb_x_nat_t_port *) 5164 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5165 dport = (struct sadb_x_nat_t_port *) 5166 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5167 iaddr = (struct sadb_address *) 5168 mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5169 raddr = (struct sadb_address *) 5170 mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5171 frag = (struct sadb_x_nat_t_frag *) 5172 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5173 5174 ipseclog((LOG_DEBUG, 5175 "key_update: type %d, sport = %d, dport = %d\n", 5176 type->sadb_x_nat_t_type_type, 5177 sport->sadb_x_nat_t_port_port, 5178 dport->sadb_x_nat_t_port_port)); 5179 5180 if (type) 5181 sav->natt_type = type->sadb_x_nat_t_type_type; 5182 if (sport) 5183 key_porttosaddr(&sav->sah->saidx.src, 5184 sport->sadb_x_nat_t_port_port); 5185 if (dport) 5186 key_porttosaddr(&sav->sah->saidx.dst, 5187 dport->sadb_x_nat_t_port_port); 5188 if (frag) 5189 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5190 else 5191 sav->esp_frag = IP_MAXPACKET; 5192 } 5193 5194 return 0; 5195 } 5196 5197 /* Just update the IPSEC_NAT_T ports if present */ 5198 static int 5199 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5200 const struct sadb_msghdr *mhp) 5201 { 5202 5203 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5204 ipseclog((LOG_DEBUG,"update: NAT-T OAi present\n")); 5205 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5206 ipseclog((LOG_DEBUG,"update: NAT-T OAr present\n")); 5207 5208 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5209 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5210 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5211 struct sadb_x_nat_t_type *type; 5212 struct sadb_x_nat_t_port *sport; 5213 struct sadb_x_nat_t_port *dport; 5214 5215 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5216 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5217 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5218 ipseclog((LOG_DEBUG, "key_update: " 5219 "invalid message.\n")); 5220 return -1; 5221 } 5222 5223 sport = (struct sadb_x_nat_t_port *) 5224 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5225 dport = (struct sadb_x_nat_t_port *) 5226 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5227 5228 if (sport) 5229 key_porttosaddr(src, 5230 sport->sadb_x_nat_t_port_port); 5231 if (dport) 5232 key_porttosaddr(dst, 5233 dport->sadb_x_nat_t_port_port); 5234 } 5235 5236 return 0; 5237 } 5238 #endif 5239 5240 5241 /* 5242 * SADB_UPDATE processing 5243 * receive 5244 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5245 * key(AE), (identity(SD),) (sensitivity)> 5246 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5247 * and send 5248 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5249 * (identity(SD),) (sensitivity)> 5250 * to the ikmpd. 5251 * 5252 * m will always be freed. 5253 */ 5254 static int 5255 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5256 { 5257 struct sadb_sa *sa0; 5258 struct sadb_address *src0, *dst0; 5259 struct secasindex saidx; 5260 struct secashead *sah; 5261 struct secasvar *sav; 5262 u_int16_t proto; 5263 u_int8_t mode; 5264 u_int16_t reqid; 5265 int error; 5266 5267 /* sanity check */ 5268 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5269 panic("key_update: NULL pointer is passed"); 5270 5271 /* map satype to proto */ 5272 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5273 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 5274 return key_senderror(so, m, EINVAL); 5275 } 5276 5277 if (mhp->ext[SADB_EXT_SA] == NULL || 5278 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5279 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5280 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5281 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5282 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5283 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5284 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5285 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5286 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5287 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5288 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5289 return key_senderror(so, m, EINVAL); 5290 } 5291 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5292 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5293 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5294 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5295 return key_senderror(so, m, EINVAL); 5296 } 5297 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5298 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5299 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5300 } else { 5301 mode = IPSEC_MODE_ANY; 5302 reqid = 0; 5303 } 5304 /* XXX boundary checking for other extensions */ 5305 5306 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5307 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5308 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5309 5310 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5311 dst0 + 1, &saidx)) != 0) 5312 return key_senderror(so, m, EINVAL); 5313 5314 #ifdef IPSEC_NAT_T 5315 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5316 return key_senderror(so, m, EINVAL); 5317 #endif 5318 5319 /* get a SA header */ 5320 if ((sah = key_getsah(&saidx)) == NULL) { 5321 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 5322 return key_senderror(so, m, ENOENT); 5323 } 5324 5325 /* set spidx if there */ 5326 /* XXX rewrite */ 5327 error = key_setident(sah, m, mhp); 5328 if (error) 5329 return key_senderror(so, m, error); 5330 5331 /* find a SA with sequence number. */ 5332 #ifdef IPSEC_DOSEQCHECK 5333 if (mhp->msg->sadb_msg_seq != 0 5334 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5335 ipseclog((LOG_DEBUG, 5336 "key_update: no larval SA with sequence %u exists.\n", 5337 mhp->msg->sadb_msg_seq)); 5338 return key_senderror(so, m, ENOENT); 5339 } 5340 #else 5341 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 5342 ipseclog((LOG_DEBUG, 5343 "key_update: no such a SA found (spi:%u)\n", 5344 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5345 return key_senderror(so, m, EINVAL); 5346 } 5347 #endif 5348 5349 /* validity check */ 5350 if (sav->sah->saidx.proto != proto) { 5351 ipseclog((LOG_DEBUG, 5352 "key_update: protocol mismatched (DB=%u param=%u)\n", 5353 sav->sah->saidx.proto, proto)); 5354 return key_senderror(so, m, EINVAL); 5355 } 5356 #ifdef IPSEC_DOSEQCHECK 5357 if (sav->spi != sa0->sadb_sa_spi) { 5358 ipseclog((LOG_DEBUG, 5359 "key_update: SPI mismatched (DB:%u param:%u)\n", 5360 (u_int32_t)ntohl(sav->spi), 5361 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5362 return key_senderror(so, m, EINVAL); 5363 } 5364 #endif 5365 if (sav->pid != mhp->msg->sadb_msg_pid) { 5366 ipseclog((LOG_DEBUG, 5367 "key_update: pid mismatched (DB:%u param:%u)\n", 5368 sav->pid, mhp->msg->sadb_msg_pid)); 5369 return key_senderror(so, m, EINVAL); 5370 } 5371 5372 /* copy sav values */ 5373 error = key_setsaval(sav, m, mhp); 5374 if (error) { 5375 KEY_FREESAV(&sav); 5376 return key_senderror(so, m, error); 5377 } 5378 5379 #ifdef IPSEC_NAT_T 5380 if ((error = key_handle_natt_info(sav,mhp)) != 0) 5381 return key_senderror(so, m, EINVAL); 5382 #endif /* IPSEC_NAT_T */ 5383 5384 /* check SA values to be mature. */ 5385 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5386 KEY_FREESAV(&sav); 5387 return key_senderror(so, m, 0); 5388 } 5389 5390 { 5391 struct mbuf *n; 5392 5393 /* set msg buf from mhp */ 5394 n = key_getmsgbuf_x1(m, mhp); 5395 if (n == NULL) { 5396 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5397 return key_senderror(so, m, ENOBUFS); 5398 } 5399 5400 m_freem(m); 5401 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5402 } 5403 } 5404 5405 /* 5406 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5407 * only called by key_update(). 5408 * OUT: 5409 * NULL : not found 5410 * others : found, pointer to a SA. 5411 */ 5412 #ifdef IPSEC_DOSEQCHECK 5413 static struct secasvar * 5414 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5415 { 5416 struct secasvar *sav; 5417 u_int state; 5418 5419 state = SADB_SASTATE_LARVAL; 5420 5421 /* search SAD with sequence number ? */ 5422 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5423 5424 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5425 5426 if (sav->seq == seq) { 5427 SA_ADDREF(sav); 5428 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5429 printf("DP key_getsavbyseq cause " 5430 "refcnt++:%d SA:%p\n", 5431 sav->refcnt, sav)); 5432 return sav; 5433 } 5434 } 5435 5436 return NULL; 5437 } 5438 #endif 5439 5440 /* 5441 * SADB_ADD processing 5442 * add an entry to SA database, when received 5443 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5444 * key(AE), (identity(SD),) (sensitivity)> 5445 * from the ikmpd, 5446 * and send 5447 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5448 * (identity(SD),) (sensitivity)> 5449 * to the ikmpd. 5450 * 5451 * IGNORE identity and sensitivity messages. 5452 * 5453 * m will always be freed. 5454 */ 5455 static int 5456 key_add(struct socket *so, struct mbuf *m, 5457 const struct sadb_msghdr *mhp) 5458 { 5459 struct sadb_sa *sa0; 5460 struct sadb_address *src0, *dst0; 5461 struct secasindex saidx; 5462 struct secashead *newsah; 5463 struct secasvar *newsav; 5464 u_int16_t proto; 5465 u_int8_t mode; 5466 u_int16_t reqid; 5467 int error; 5468 5469 /* sanity check */ 5470 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5471 panic("key_add: NULL pointer is passed"); 5472 5473 /* map satype to proto */ 5474 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5475 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5476 return key_senderror(so, m, EINVAL); 5477 } 5478 5479 if (mhp->ext[SADB_EXT_SA] == NULL || 5480 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5481 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5482 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5483 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5484 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5485 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5486 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5487 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5488 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5489 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5490 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5491 return key_senderror(so, m, EINVAL); 5492 } 5493 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5494 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5495 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5496 /* XXX need more */ 5497 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5498 return key_senderror(so, m, EINVAL); 5499 } 5500 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5501 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5502 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5503 } else { 5504 mode = IPSEC_MODE_ANY; 5505 reqid = 0; 5506 } 5507 5508 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5509 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5510 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5511 5512 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5513 dst0 + 1, &saidx)) != 0) 5514 return key_senderror(so, m, EINVAL); 5515 5516 #ifdef IPSEC_NAT_T 5517 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5518 return key_senderror(so, m, EINVAL); 5519 #endif 5520 5521 /* get a SA header */ 5522 if ((newsah = key_getsah(&saidx)) == NULL) { 5523 /* create a new SA header */ 5524 if ((newsah = key_newsah(&saidx)) == NULL) { 5525 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5526 return key_senderror(so, m, ENOBUFS); 5527 } 5528 } 5529 5530 /* set spidx if there */ 5531 /* XXX rewrite */ 5532 error = key_setident(newsah, m, mhp); 5533 if (error) { 5534 return key_senderror(so, m, error); 5535 } 5536 5537 /* create new SA entry. */ 5538 /* We can create new SA only if SPI is differenct. */ 5539 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5540 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5541 return key_senderror(so, m, EEXIST); 5542 } 5543 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5544 if (newsav == NULL) { 5545 return key_senderror(so, m, error); 5546 } 5547 5548 #ifdef IPSEC_NAT_T 5549 if ((error = key_handle_natt_info(newsav, mhp)) != 0) 5550 return key_senderror(so, m, EINVAL); 5551 #endif /* IPSEC_NAT_T */ 5552 5553 /* check SA values to be mature. */ 5554 if ((error = key_mature(newsav)) != 0) { 5555 KEY_FREESAV(&newsav); 5556 return key_senderror(so, m, error); 5557 } 5558 5559 /* 5560 * don't call key_freesav() here, as we would like to keep the SA 5561 * in the database on success. 5562 */ 5563 5564 { 5565 struct mbuf *n; 5566 5567 /* set msg buf from mhp */ 5568 n = key_getmsgbuf_x1(m, mhp); 5569 if (n == NULL) { 5570 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5571 return key_senderror(so, m, ENOBUFS); 5572 } 5573 5574 m_freem(m); 5575 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5576 } 5577 } 5578 5579 /* m is retained */ 5580 static int 5581 key_setident(struct secashead *sah, struct mbuf *m, 5582 const struct sadb_msghdr *mhp) 5583 { 5584 const struct sadb_ident *idsrc, *iddst; 5585 int idsrclen, iddstlen; 5586 5587 /* sanity check */ 5588 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5589 panic("key_setident: NULL pointer is passed"); 5590 5591 /* don't make buffer if not there */ 5592 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5593 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5594 sah->idents = NULL; 5595 sah->identd = NULL; 5596 return 0; 5597 } 5598 5599 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5600 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5601 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5602 return EINVAL; 5603 } 5604 5605 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5606 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5607 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5608 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5609 5610 /* validity check */ 5611 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5612 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5613 return EINVAL; 5614 } 5615 5616 switch (idsrc->sadb_ident_type) { 5617 case SADB_IDENTTYPE_PREFIX: 5618 case SADB_IDENTTYPE_FQDN: 5619 case SADB_IDENTTYPE_USERFQDN: 5620 default: 5621 /* XXX do nothing */ 5622 sah->idents = NULL; 5623 sah->identd = NULL; 5624 return 0; 5625 } 5626 5627 /* make structure */ 5628 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5629 if (sah->idents == NULL) { 5630 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5631 return ENOBUFS; 5632 } 5633 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5634 if (sah->identd == NULL) { 5635 KFREE(sah->idents); 5636 sah->idents = NULL; 5637 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5638 return ENOBUFS; 5639 } 5640 memcpy(sah->idents, idsrc, idsrclen); 5641 memcpy(sah->identd, iddst, iddstlen); 5642 5643 return 0; 5644 } 5645 5646 /* 5647 * m will not be freed on return. 5648 * it is caller's responsibility to free the result. 5649 */ 5650 static struct mbuf * 5651 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5652 { 5653 struct mbuf *n; 5654 5655 /* sanity check */ 5656 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5657 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5658 5659 /* create new sadb_msg to reply. */ 5660 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5661 SADB_EXT_SA, SADB_X_EXT_SA2, 5662 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5663 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5664 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5665 if (!n) 5666 return NULL; 5667 5668 if (n->m_len < sizeof(struct sadb_msg)) { 5669 n = m_pullup(n, sizeof(struct sadb_msg)); 5670 if (n == NULL) 5671 return NULL; 5672 } 5673 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5674 mtod(n, struct sadb_msg *)->sadb_msg_len = 5675 PFKEY_UNIT64(n->m_pkthdr.len); 5676 5677 return n; 5678 } 5679 5680 static int key_delete_all (struct socket *, struct mbuf *, 5681 const struct sadb_msghdr *, u_int16_t); 5682 5683 /* 5684 * SADB_DELETE processing 5685 * receive 5686 * <base, SA(*), address(SD)> 5687 * from the ikmpd, and set SADB_SASTATE_DEAD, 5688 * and send, 5689 * <base, SA(*), address(SD)> 5690 * to the ikmpd. 5691 * 5692 * m will always be freed. 5693 */ 5694 static int 5695 key_delete(struct socket *so, struct mbuf *m, 5696 const struct sadb_msghdr *mhp) 5697 { 5698 struct sadb_sa *sa0; 5699 struct sadb_address *src0, *dst0; 5700 struct secasindex saidx; 5701 struct secashead *sah; 5702 struct secasvar *sav = NULL; 5703 u_int16_t proto; 5704 int error; 5705 5706 /* sanity check */ 5707 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5708 panic("key_delete: NULL pointer is passed"); 5709 5710 /* map satype to proto */ 5711 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5712 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5713 return key_senderror(so, m, EINVAL); 5714 } 5715 5716 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5717 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5718 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5719 return key_senderror(so, m, EINVAL); 5720 } 5721 5722 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5723 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5724 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5725 return key_senderror(so, m, EINVAL); 5726 } 5727 5728 if (mhp->ext[SADB_EXT_SA] == NULL) { 5729 /* 5730 * Caller wants us to delete all non-LARVAL SAs 5731 * that match the src/dst. This is used during 5732 * IKE INITIAL-CONTACT. 5733 */ 5734 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5735 return key_delete_all(so, m, mhp, proto); 5736 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5737 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5738 return key_senderror(so, m, EINVAL); 5739 } 5740 5741 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5742 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5743 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5744 5745 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5746 dst0 + 1, &saidx)) != 0) 5747 return key_senderror(so, m, EINVAL); 5748 5749 #ifdef IPSEC_NAT_T 5750 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5751 return key_senderror(so, m, EINVAL); 5752 #endif 5753 5754 /* get a SA header */ 5755 LIST_FOREACH(sah, &sahtree, chain) { 5756 if (sah->state == SADB_SASTATE_DEAD) 5757 continue; 5758 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5759 continue; 5760 5761 /* get a SA with SPI. */ 5762 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5763 if (sav) 5764 break; 5765 } 5766 if (sah == NULL) { 5767 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5768 return key_senderror(so, m, ENOENT); 5769 } 5770 5771 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5772 KEY_FREESAV(&sav); 5773 5774 { 5775 struct mbuf *n; 5776 struct sadb_msg *newmsg; 5777 5778 /* create new sadb_msg to reply. */ 5779 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5780 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5781 if (!n) 5782 return key_senderror(so, m, ENOBUFS); 5783 5784 if (n->m_len < sizeof(struct sadb_msg)) { 5785 n = m_pullup(n, sizeof(struct sadb_msg)); 5786 if (n == NULL) 5787 return key_senderror(so, m, ENOBUFS); 5788 } 5789 newmsg = mtod(n, struct sadb_msg *); 5790 newmsg->sadb_msg_errno = 0; 5791 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5792 5793 m_freem(m); 5794 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5795 } 5796 } 5797 5798 /* 5799 * delete all SAs for src/dst. Called from key_delete(). 5800 */ 5801 static int 5802 key_delete_all(struct socket *so, struct mbuf *m, 5803 const struct sadb_msghdr *mhp, u_int16_t proto) 5804 { 5805 struct sadb_address *src0, *dst0; 5806 struct secasindex saidx; 5807 struct secashead *sah; 5808 struct secasvar *sav, *nextsav; 5809 u_int stateidx, state; 5810 int error; 5811 5812 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5813 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5814 5815 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5816 dst0 + 1, &saidx)) != 0) 5817 return key_senderror(so, m, EINVAL); 5818 5819 #ifdef IPSEC_NAT_T 5820 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5821 return key_senderror(so, m, EINVAL); 5822 #endif 5823 5824 LIST_FOREACH(sah, &sahtree, chain) { 5825 if (sah->state == SADB_SASTATE_DEAD) 5826 continue; 5827 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5828 continue; 5829 5830 /* Delete all non-LARVAL SAs. */ 5831 for (stateidx = 0; 5832 stateidx < _ARRAYLEN(saorder_state_alive); 5833 stateidx++) { 5834 state = saorder_state_alive[stateidx]; 5835 if (state == SADB_SASTATE_LARVAL) 5836 continue; 5837 for (sav = LIST_FIRST(&sah->savtree[state]); 5838 sav != NULL; sav = nextsav) { 5839 nextsav = LIST_NEXT(sav, chain); 5840 /* sanity check */ 5841 if (sav->state != state) { 5842 ipseclog((LOG_DEBUG, "key_delete_all: " 5843 "invalid sav->state " 5844 "(queue: %d SA: %d)\n", 5845 state, sav->state)); 5846 continue; 5847 } 5848 5849 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5850 KEY_FREESAV(&sav); 5851 } 5852 } 5853 } 5854 { 5855 struct mbuf *n; 5856 struct sadb_msg *newmsg; 5857 5858 /* create new sadb_msg to reply. */ 5859 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5860 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5861 if (!n) 5862 return key_senderror(so, m, ENOBUFS); 5863 5864 if (n->m_len < sizeof(struct sadb_msg)) { 5865 n = m_pullup(n, sizeof(struct sadb_msg)); 5866 if (n == NULL) 5867 return key_senderror(so, m, ENOBUFS); 5868 } 5869 newmsg = mtod(n, struct sadb_msg *); 5870 newmsg->sadb_msg_errno = 0; 5871 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5872 5873 m_freem(m); 5874 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5875 } 5876 } 5877 5878 /* 5879 * SADB_GET processing 5880 * receive 5881 * <base, SA(*), address(SD)> 5882 * from the ikmpd, and get a SP and a SA to respond, 5883 * and send, 5884 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5885 * (identity(SD),) (sensitivity)> 5886 * to the ikmpd. 5887 * 5888 * m will always be freed. 5889 */ 5890 static int 5891 key_get(struct socket *so, struct mbuf *m, 5892 const struct sadb_msghdr *mhp) 5893 { 5894 struct sadb_sa *sa0; 5895 struct sadb_address *src0, *dst0; 5896 struct secasindex saidx; 5897 struct secashead *sah; 5898 struct secasvar *sav = NULL; 5899 u_int16_t proto; 5900 int error; 5901 5902 /* sanity check */ 5903 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5904 panic("key_get: NULL pointer is passed"); 5905 5906 /* map satype to proto */ 5907 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5908 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5909 return key_senderror(so, m, EINVAL); 5910 } 5911 5912 if (mhp->ext[SADB_EXT_SA] == NULL || 5913 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5914 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5915 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5916 return key_senderror(so, m, EINVAL); 5917 } 5918 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5919 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5920 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5921 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5922 return key_senderror(so, m, EINVAL); 5923 } 5924 5925 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5926 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5927 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5928 5929 5930 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5931 dst0 + 1, &saidx)) != 0) 5932 return key_senderror(so, m, EINVAL); 5933 5934 #ifdef IPSEC_NAT_T 5935 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5936 return key_senderror(so, m, EINVAL); 5937 #endif 5938 5939 /* get a SA header */ 5940 LIST_FOREACH(sah, &sahtree, chain) { 5941 if (sah->state == SADB_SASTATE_DEAD) 5942 continue; 5943 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5944 continue; 5945 5946 /* get a SA with SPI. */ 5947 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5948 if (sav) 5949 break; 5950 } 5951 if (sah == NULL) { 5952 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5953 return key_senderror(so, m, ENOENT); 5954 } 5955 5956 { 5957 struct mbuf *n; 5958 u_int8_t satype; 5959 5960 /* map proto to satype */ 5961 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5962 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5963 return key_senderror(so, m, EINVAL); 5964 } 5965 5966 /* create new sadb_msg to reply. */ 5967 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5968 mhp->msg->sadb_msg_pid); 5969 if (!n) 5970 return key_senderror(so, m, ENOBUFS); 5971 5972 m_freem(m); 5973 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5974 } 5975 } 5976 5977 /* XXX make it sysctl-configurable? */ 5978 static void 5979 key_getcomb_setlifetime(struct sadb_comb *comb) 5980 { 5981 5982 comb->sadb_comb_soft_allocations = 1; 5983 comb->sadb_comb_hard_allocations = 1; 5984 comb->sadb_comb_soft_bytes = 0; 5985 comb->sadb_comb_hard_bytes = 0; 5986 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5987 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5988 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5989 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5990 } 5991 5992 /* 5993 * XXX reorder combinations by preference 5994 * XXX no idea if the user wants ESP authentication or not 5995 */ 5996 static struct mbuf * 5997 key_getcomb_esp(void) 5998 { 5999 struct sadb_comb *comb; 6000 const struct enc_xform *algo; 6001 struct mbuf *result = NULL, *m, *n; 6002 int encmin; 6003 int i, off, o; 6004 int totlen; 6005 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6006 6007 m = NULL; 6008 for (i = 1; i <= SADB_EALG_MAX; i++) { 6009 algo = esp_algorithm_lookup(i); 6010 if (algo == NULL) 6011 continue; 6012 6013 /* discard algorithms with key size smaller than system min */ 6014 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 6015 continue; 6016 if (_BITS(algo->minkey) < ipsec_esp_keymin) 6017 encmin = ipsec_esp_keymin; 6018 else 6019 encmin = _BITS(algo->minkey); 6020 6021 if (ipsec_esp_auth) 6022 m = key_getcomb_ah(); 6023 else { 6024 IPSEC_ASSERT(l <= MLEN, 6025 ("key_getcomb_esp: l=%u > MLEN=%lu", 6026 l, (u_long) MLEN)); 6027 MGET(m, M_DONTWAIT, MT_DATA); 6028 if (m) { 6029 M_ALIGN(m, l); 6030 m->m_len = l; 6031 m->m_next = NULL; 6032 memset(mtod(m, void *), 0, m->m_len); 6033 } 6034 } 6035 if (!m) 6036 goto fail; 6037 6038 totlen = 0; 6039 for (n = m; n; n = n->m_next) 6040 totlen += n->m_len; 6041 IPSEC_ASSERT((totlen % l) == 0, 6042 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 6043 6044 for (off = 0; off < totlen; off += l) { 6045 n = m_pulldown(m, off, l, &o); 6046 if (!n) { 6047 /* m is already freed */ 6048 goto fail; 6049 } 6050 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6051 memset(comb, 0, sizeof(*comb)); 6052 key_getcomb_setlifetime(comb); 6053 comb->sadb_comb_encrypt = i; 6054 comb->sadb_comb_encrypt_minbits = encmin; 6055 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6056 } 6057 6058 if (!result) 6059 result = m; 6060 else 6061 m_cat(result, m); 6062 } 6063 6064 return result; 6065 6066 fail: 6067 if (result) 6068 m_freem(result); 6069 return NULL; 6070 } 6071 6072 static void 6073 key_getsizes_ah(const struct auth_hash *ah, int alg, 6074 u_int16_t* ksmin, u_int16_t* ksmax) 6075 { 6076 *ksmin = *ksmax = ah->keysize; 6077 if (ah->keysize == 0) { 6078 /* 6079 * Transform takes arbitrary key size but algorithm 6080 * key size is restricted. Enforce this here. 6081 */ 6082 switch (alg) { 6083 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6084 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6085 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 6086 default: 6087 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 6088 alg)); 6089 break; 6090 } 6091 } 6092 } 6093 6094 /* 6095 * XXX reorder combinations by preference 6096 */ 6097 static struct mbuf * 6098 key_getcomb_ah(void) 6099 { 6100 struct sadb_comb *comb; 6101 const struct auth_hash *algo; 6102 struct mbuf *m; 6103 u_int16_t minkeysize, maxkeysize; 6104 int i; 6105 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6106 6107 m = NULL; 6108 for (i = 1; i <= SADB_AALG_MAX; i++) { 6109 #if 1 6110 /* we prefer HMAC algorithms, not old algorithms */ 6111 if (i != SADB_AALG_SHA1HMAC && 6112 i != SADB_AALG_MD5HMAC && 6113 i != SADB_X_AALG_SHA2_256 && 6114 i != SADB_X_AALG_SHA2_384 && 6115 i != SADB_X_AALG_SHA2_512) 6116 continue; 6117 #endif 6118 algo = ah_algorithm_lookup(i); 6119 if (!algo) 6120 continue; 6121 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6122 /* discard algorithms with key size smaller than system min */ 6123 if (_BITS(minkeysize) < ipsec_ah_keymin) 6124 continue; 6125 6126 if (!m) { 6127 IPSEC_ASSERT(l <= MLEN, 6128 ("key_getcomb_ah: l=%u > MLEN=%lu", 6129 l, (u_long) MLEN)); 6130 MGET(m, M_DONTWAIT, MT_DATA); 6131 if (m) { 6132 M_ALIGN(m, l); 6133 m->m_len = l; 6134 m->m_next = NULL; 6135 } 6136 } else 6137 M_PREPEND(m, l, M_DONTWAIT); 6138 if (!m) 6139 return NULL; 6140 6141 comb = mtod(m, struct sadb_comb *); 6142 memset(comb, 0, sizeof(*comb)); 6143 key_getcomb_setlifetime(comb); 6144 comb->sadb_comb_auth = i; 6145 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6146 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6147 } 6148 6149 return m; 6150 } 6151 6152 /* 6153 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6154 * XXX reorder combinations by preference 6155 */ 6156 static struct mbuf * 6157 key_getcomb_ipcomp(void) 6158 { 6159 struct sadb_comb *comb; 6160 const struct comp_algo *algo; 6161 struct mbuf *m; 6162 int i; 6163 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6164 6165 m = NULL; 6166 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6167 algo = ipcomp_algorithm_lookup(i); 6168 if (!algo) 6169 continue; 6170 6171 if (!m) { 6172 IPSEC_ASSERT(l <= MLEN, 6173 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 6174 l, (u_long) MLEN)); 6175 MGET(m, M_DONTWAIT, MT_DATA); 6176 if (m) { 6177 M_ALIGN(m, l); 6178 m->m_len = l; 6179 m->m_next = NULL; 6180 } 6181 } else 6182 M_PREPEND(m, l, M_DONTWAIT); 6183 if (!m) 6184 return NULL; 6185 6186 comb = mtod(m, struct sadb_comb *); 6187 memset(comb, 0, sizeof(*comb)); 6188 key_getcomb_setlifetime(comb); 6189 comb->sadb_comb_encrypt = i; 6190 /* what should we set into sadb_comb_*_{min,max}bits? */ 6191 } 6192 6193 return m; 6194 } 6195 6196 /* 6197 * XXX no way to pass mode (transport/tunnel) to userland 6198 * XXX replay checking? 6199 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6200 */ 6201 static struct mbuf * 6202 key_getprop(const struct secasindex *saidx) 6203 { 6204 struct sadb_prop *prop; 6205 struct mbuf *m, *n; 6206 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6207 int totlen; 6208 6209 switch (saidx->proto) { 6210 case IPPROTO_ESP: 6211 m = key_getcomb_esp(); 6212 break; 6213 case IPPROTO_AH: 6214 m = key_getcomb_ah(); 6215 break; 6216 case IPPROTO_IPCOMP: 6217 m = key_getcomb_ipcomp(); 6218 break; 6219 default: 6220 return NULL; 6221 } 6222 6223 if (!m) 6224 return NULL; 6225 M_PREPEND(m, l, M_DONTWAIT); 6226 if (!m) 6227 return NULL; 6228 6229 totlen = 0; 6230 for (n = m; n; n = n->m_next) 6231 totlen += n->m_len; 6232 6233 prop = mtod(m, struct sadb_prop *); 6234 memset(prop, 0, sizeof(*prop)); 6235 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6236 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6237 prop->sadb_prop_replay = 32; /* XXX */ 6238 6239 return m; 6240 } 6241 6242 /* 6243 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6244 * send 6245 * <base, SA, address(SD), (address(P)), x_policy, 6246 * (identity(SD),) (sensitivity,) proposal> 6247 * to KMD, and expect to receive 6248 * <base> with SADB_ACQUIRE if error occurred, 6249 * or 6250 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6251 * from KMD by PF_KEY. 6252 * 6253 * XXX x_policy is outside of RFC2367 (KAME extension). 6254 * XXX sensitivity is not supported. 6255 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6256 * see comment for key_getcomb_ipcomp(). 6257 * 6258 * OUT: 6259 * 0 : succeed 6260 * others: error number 6261 */ 6262 static int 6263 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6264 { 6265 struct mbuf *result = NULL, *m; 6266 #ifndef IPSEC_NONBLOCK_ACQUIRE 6267 struct secacq *newacq; 6268 #endif 6269 u_int8_t satype; 6270 int error = -1; 6271 u_int32_t seq; 6272 6273 /* sanity check */ 6274 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 6275 satype = key_proto2satype(saidx->proto); 6276 IPSEC_ASSERT(satype != 0, 6277 ("key_acquire: null satype, protocol %u", saidx->proto)); 6278 6279 #ifndef IPSEC_NONBLOCK_ACQUIRE 6280 /* 6281 * We never do anything about acquirng SA. There is anather 6282 * solution that kernel blocks to send SADB_ACQUIRE message until 6283 * getting something message from IKEd. In later case, to be 6284 * managed with ACQUIRING list. 6285 */ 6286 /* Get an entry to check whether sending message or not. */ 6287 if ((newacq = key_getacq(saidx)) != NULL) { 6288 if (key_blockacq_count < newacq->count) { 6289 /* reset counter and do send message. */ 6290 newacq->count = 0; 6291 } else { 6292 /* increment counter and do nothing. */ 6293 newacq->count++; 6294 return 0; 6295 } 6296 } else { 6297 /* make new entry for blocking to send SADB_ACQUIRE. */ 6298 if ((newacq = key_newacq(saidx)) == NULL) 6299 return ENOBUFS; 6300 6301 /* add to acqtree */ 6302 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6303 } 6304 #endif 6305 6306 6307 #ifndef IPSEC_NONBLOCK_ACQUIRE 6308 seq = newacq->seq; 6309 #else 6310 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6311 #endif 6312 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6313 if (!m) { 6314 error = ENOBUFS; 6315 goto fail; 6316 } 6317 result = m; 6318 6319 /* set sadb_address for saidx's. */ 6320 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6321 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6322 if (!m) { 6323 error = ENOBUFS; 6324 goto fail; 6325 } 6326 m_cat(result, m); 6327 6328 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6329 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6330 if (!m) { 6331 error = ENOBUFS; 6332 goto fail; 6333 } 6334 m_cat(result, m); 6335 6336 /* XXX proxy address (optional) */ 6337 6338 /* set sadb_x_policy */ 6339 if (sp) { 6340 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6341 if (!m) { 6342 error = ENOBUFS; 6343 goto fail; 6344 } 6345 m_cat(result, m); 6346 } 6347 6348 /* XXX identity (optional) */ 6349 #if 0 6350 if (idexttype && fqdn) { 6351 /* create identity extension (FQDN) */ 6352 struct sadb_ident *id; 6353 int fqdnlen; 6354 6355 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6356 id = (struct sadb_ident *)p; 6357 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6358 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6359 id->sadb_ident_exttype = idexttype; 6360 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6361 memcpy(id + 1, fqdn, fqdnlen); 6362 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6363 } 6364 6365 if (idexttype) { 6366 /* create identity extension (USERFQDN) */ 6367 struct sadb_ident *id; 6368 int userfqdnlen; 6369 6370 if (userfqdn) { 6371 /* +1 for terminating-NUL */ 6372 userfqdnlen = strlen(userfqdn) + 1; 6373 } else 6374 userfqdnlen = 0; 6375 id = (struct sadb_ident *)p; 6376 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6377 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6378 id->sadb_ident_exttype = idexttype; 6379 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6380 /* XXX is it correct? */ 6381 if (curlwp) 6382 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6383 if (userfqdn && userfqdnlen) 6384 memcpy(id + 1, userfqdn, userfqdnlen); 6385 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6386 } 6387 #endif 6388 6389 /* XXX sensitivity (optional) */ 6390 6391 /* create proposal/combination extension */ 6392 m = key_getprop(saidx); 6393 #if 0 6394 /* 6395 * spec conformant: always attach proposal/combination extension, 6396 * the problem is that we have no way to attach it for ipcomp, 6397 * due to the way sadb_comb is declared in RFC2367. 6398 */ 6399 if (!m) { 6400 error = ENOBUFS; 6401 goto fail; 6402 } 6403 m_cat(result, m); 6404 #else 6405 /* 6406 * outside of spec; make proposal/combination extension optional. 6407 */ 6408 if (m) 6409 m_cat(result, m); 6410 #endif 6411 6412 if ((result->m_flags & M_PKTHDR) == 0) { 6413 error = EINVAL; 6414 goto fail; 6415 } 6416 6417 if (result->m_len < sizeof(struct sadb_msg)) { 6418 result = m_pullup(result, sizeof(struct sadb_msg)); 6419 if (result == NULL) { 6420 error = ENOBUFS; 6421 goto fail; 6422 } 6423 } 6424 6425 result->m_pkthdr.len = 0; 6426 for (m = result; m; m = m->m_next) 6427 result->m_pkthdr.len += m->m_len; 6428 6429 mtod(result, struct sadb_msg *)->sadb_msg_len = 6430 PFKEY_UNIT64(result->m_pkthdr.len); 6431 6432 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6433 6434 fail: 6435 if (result) 6436 m_freem(result); 6437 return error; 6438 } 6439 6440 #ifndef IPSEC_NONBLOCK_ACQUIRE 6441 static struct secacq * 6442 key_newacq(const struct secasindex *saidx) 6443 { 6444 struct secacq *newacq; 6445 6446 /* get new entry */ 6447 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6448 if (newacq == NULL) { 6449 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6450 return NULL; 6451 } 6452 memset(newacq, 0, sizeof(*newacq)); 6453 6454 /* copy secindex */ 6455 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6456 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6457 newacq->created = time_uptime; 6458 newacq->count = 0; 6459 6460 return newacq; 6461 } 6462 6463 static struct secacq * 6464 key_getacq(const struct secasindex *saidx) 6465 { 6466 struct secacq *acq; 6467 6468 LIST_FOREACH(acq, &acqtree, chain) { 6469 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6470 return acq; 6471 } 6472 6473 return NULL; 6474 } 6475 6476 static struct secacq * 6477 key_getacqbyseq(u_int32_t seq) 6478 { 6479 struct secacq *acq; 6480 6481 LIST_FOREACH(acq, &acqtree, chain) { 6482 if (acq->seq == seq) 6483 return acq; 6484 } 6485 6486 return NULL; 6487 } 6488 #endif 6489 6490 static struct secspacq * 6491 key_newspacq(const struct secpolicyindex *spidx) 6492 { 6493 struct secspacq *acq; 6494 6495 /* get new entry */ 6496 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6497 if (acq == NULL) { 6498 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6499 return NULL; 6500 } 6501 memset(acq, 0, sizeof(*acq)); 6502 6503 /* copy secindex */ 6504 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6505 acq->created = time_uptime; 6506 acq->count = 0; 6507 6508 return acq; 6509 } 6510 6511 static struct secspacq * 6512 key_getspacq(const struct secpolicyindex *spidx) 6513 { 6514 struct secspacq *acq; 6515 6516 LIST_FOREACH(acq, &spacqtree, chain) { 6517 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6518 return acq; 6519 } 6520 6521 return NULL; 6522 } 6523 6524 /* 6525 * SADB_ACQUIRE processing, 6526 * in first situation, is receiving 6527 * <base> 6528 * from the ikmpd, and clear sequence of its secasvar entry. 6529 * 6530 * In second situation, is receiving 6531 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6532 * from a user land process, and return 6533 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6534 * to the socket. 6535 * 6536 * m will always be freed. 6537 */ 6538 static int 6539 key_acquire2(struct socket *so, struct mbuf *m, 6540 const struct sadb_msghdr *mhp) 6541 { 6542 const struct sadb_address *src0, *dst0; 6543 struct secasindex saidx; 6544 struct secashead *sah; 6545 u_int16_t proto; 6546 int error; 6547 6548 /* sanity check */ 6549 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6550 panic("key_acquire2: NULL pointer is passed"); 6551 6552 /* 6553 * Error message from KMd. 6554 * We assume that if error was occurred in IKEd, the length of PFKEY 6555 * message is equal to the size of sadb_msg structure. 6556 * We do not raise error even if error occurred in this function. 6557 */ 6558 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6559 #ifndef IPSEC_NONBLOCK_ACQUIRE 6560 struct secacq *acq; 6561 6562 /* check sequence number */ 6563 if (mhp->msg->sadb_msg_seq == 0) { 6564 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6565 m_freem(m); 6566 return 0; 6567 } 6568 6569 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6570 /* 6571 * the specified larval SA is already gone, or we got 6572 * a bogus sequence number. we can silently ignore it. 6573 */ 6574 m_freem(m); 6575 return 0; 6576 } 6577 6578 /* reset acq counter in order to deletion by timehander. */ 6579 acq->created = time_uptime; 6580 acq->count = 0; 6581 #endif 6582 m_freem(m); 6583 return 0; 6584 } 6585 6586 /* 6587 * This message is from user land. 6588 */ 6589 6590 /* map satype to proto */ 6591 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6592 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6593 return key_senderror(so, m, EINVAL); 6594 } 6595 6596 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6597 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6598 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6599 /* error */ 6600 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6601 return key_senderror(so, m, EINVAL); 6602 } 6603 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6604 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6605 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6606 /* error */ 6607 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6608 return key_senderror(so, m, EINVAL); 6609 } 6610 6611 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6612 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6613 6614 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 6615 dst0 + 1, &saidx)) != 0) 6616 return key_senderror(so, m, EINVAL); 6617 6618 #ifdef IPSEC_NAT_T 6619 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 6620 return key_senderror(so, m, EINVAL); 6621 #endif 6622 6623 /* get a SA index */ 6624 LIST_FOREACH(sah, &sahtree, chain) { 6625 if (sah->state == SADB_SASTATE_DEAD) 6626 continue; 6627 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6628 break; 6629 } 6630 if (sah != NULL) { 6631 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6632 return key_senderror(so, m, EEXIST); 6633 } 6634 6635 error = key_acquire(&saidx, NULL); 6636 if (error != 0) { 6637 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6638 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6639 return key_senderror(so, m, error); 6640 } 6641 6642 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6643 } 6644 6645 /* 6646 * SADB_REGISTER processing. 6647 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6648 * receive 6649 * <base> 6650 * from the ikmpd, and register a socket to send PF_KEY messages, 6651 * and send 6652 * <base, supported> 6653 * to KMD by PF_KEY. 6654 * If socket is detached, must free from regnode. 6655 * 6656 * m will always be freed. 6657 */ 6658 static int 6659 key_register(struct socket *so, struct mbuf *m, 6660 const struct sadb_msghdr *mhp) 6661 { 6662 struct secreg *reg, *newreg = 0; 6663 6664 /* sanity check */ 6665 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6666 panic("key_register: NULL pointer is passed"); 6667 6668 /* check for invalid register message */ 6669 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6670 return key_senderror(so, m, EINVAL); 6671 6672 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6673 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6674 goto setmsg; 6675 6676 /* check whether existing or not */ 6677 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6678 if (reg->so == so) { 6679 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6680 return key_senderror(so, m, EEXIST); 6681 } 6682 } 6683 6684 /* create regnode */ 6685 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6686 if (newreg == NULL) { 6687 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6688 return key_senderror(so, m, ENOBUFS); 6689 } 6690 memset(newreg, 0, sizeof(*newreg)); 6691 6692 newreg->so = so; 6693 ((struct keycb *)sotorawcb(so))->kp_registered++; 6694 6695 /* add regnode to regtree. */ 6696 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6697 6698 setmsg: 6699 { 6700 struct mbuf *n; 6701 struct sadb_msg *newmsg; 6702 struct sadb_supported *sup; 6703 u_int len, alen, elen; 6704 int off; 6705 int i; 6706 struct sadb_alg *alg; 6707 6708 /* create new sadb_msg to reply. */ 6709 alen = 0; 6710 for (i = 1; i <= SADB_AALG_MAX; i++) { 6711 if (ah_algorithm_lookup(i)) 6712 alen += sizeof(struct sadb_alg); 6713 } 6714 if (alen) 6715 alen += sizeof(struct sadb_supported); 6716 elen = 0; 6717 for (i = 1; i <= SADB_EALG_MAX; i++) { 6718 if (esp_algorithm_lookup(i)) 6719 elen += sizeof(struct sadb_alg); 6720 } 6721 if (elen) 6722 elen += sizeof(struct sadb_supported); 6723 6724 len = sizeof(struct sadb_msg) + alen + elen; 6725 6726 if (len > MCLBYTES) 6727 return key_senderror(so, m, ENOBUFS); 6728 6729 MGETHDR(n, M_DONTWAIT, MT_DATA); 6730 if (len > MHLEN) { 6731 MCLGET(n, M_DONTWAIT); 6732 if ((n->m_flags & M_EXT) == 0) { 6733 m_freem(n); 6734 n = NULL; 6735 } 6736 } 6737 if (!n) 6738 return key_senderror(so, m, ENOBUFS); 6739 6740 n->m_pkthdr.len = n->m_len = len; 6741 n->m_next = NULL; 6742 off = 0; 6743 6744 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6745 newmsg = mtod(n, struct sadb_msg *); 6746 newmsg->sadb_msg_errno = 0; 6747 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6748 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6749 6750 /* for authentication algorithm */ 6751 if (alen) { 6752 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6753 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6754 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6755 off += PFKEY_ALIGN8(sizeof(*sup)); 6756 6757 for (i = 1; i <= SADB_AALG_MAX; i++) { 6758 const struct auth_hash *aalgo; 6759 u_int16_t minkeysize, maxkeysize; 6760 6761 aalgo = ah_algorithm_lookup(i); 6762 if (!aalgo) 6763 continue; 6764 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6765 alg->sadb_alg_id = i; 6766 alg->sadb_alg_ivlen = 0; 6767 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6768 alg->sadb_alg_minbits = _BITS(minkeysize); 6769 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6770 off += PFKEY_ALIGN8(sizeof(*alg)); 6771 } 6772 } 6773 6774 /* for encryption algorithm */ 6775 if (elen) { 6776 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6777 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6778 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6779 off += PFKEY_ALIGN8(sizeof(*sup)); 6780 6781 for (i = 1; i <= SADB_EALG_MAX; i++) { 6782 const struct enc_xform *ealgo; 6783 6784 ealgo = esp_algorithm_lookup(i); 6785 if (!ealgo) 6786 continue; 6787 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6788 alg->sadb_alg_id = i; 6789 alg->sadb_alg_ivlen = ealgo->blocksize; 6790 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6791 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6792 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6793 } 6794 } 6795 6796 #ifdef DIAGNOSTIC 6797 if (off != len) 6798 panic("length assumption failed in key_register"); 6799 #endif 6800 6801 m_freem(m); 6802 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6803 } 6804 } 6805 6806 /* 6807 * free secreg entry registered. 6808 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6809 */ 6810 void 6811 key_freereg(struct socket *so) 6812 { 6813 struct secreg *reg; 6814 int i; 6815 6816 /* sanity check */ 6817 if (so == NULL) 6818 panic("key_freereg: NULL pointer is passed"); 6819 6820 /* 6821 * check whether existing or not. 6822 * check all type of SA, because there is a potential that 6823 * one socket is registered to multiple type of SA. 6824 */ 6825 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6826 LIST_FOREACH(reg, ®tree[i], chain) { 6827 if (reg->so == so 6828 && __LIST_CHAINED(reg)) { 6829 LIST_REMOVE(reg, chain); 6830 KFREE(reg); 6831 break; 6832 } 6833 } 6834 } 6835 6836 return; 6837 } 6838 6839 /* 6840 * SADB_EXPIRE processing 6841 * send 6842 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6843 * to KMD by PF_KEY. 6844 * NOTE: We send only soft lifetime extension. 6845 * 6846 * OUT: 0 : succeed 6847 * others : error number 6848 */ 6849 static int 6850 key_expire(struct secasvar *sav) 6851 { 6852 int s; 6853 int satype; 6854 struct mbuf *result = NULL, *m; 6855 int len; 6856 int error = -1; 6857 struct sadb_lifetime *lt; 6858 6859 /* XXX: Why do we lock ? */ 6860 s = splsoftnet(); /*called from softclock()*/ 6861 6862 /* sanity check */ 6863 if (sav == NULL) 6864 panic("key_expire: NULL pointer is passed"); 6865 if (sav->sah == NULL) 6866 panic("key_expire: Why was SA index in SA NULL"); 6867 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6868 panic("key_expire: invalid proto is passed"); 6869 6870 /* set msg header */ 6871 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6872 if (!m) { 6873 error = ENOBUFS; 6874 goto fail; 6875 } 6876 result = m; 6877 6878 /* create SA extension */ 6879 m = key_setsadbsa(sav); 6880 if (!m) { 6881 error = ENOBUFS; 6882 goto fail; 6883 } 6884 m_cat(result, m); 6885 6886 /* create SA extension */ 6887 m = key_setsadbxsa2(sav->sah->saidx.mode, 6888 sav->replay ? sav->replay->count : 0, 6889 sav->sah->saidx.reqid); 6890 if (!m) { 6891 error = ENOBUFS; 6892 goto fail; 6893 } 6894 m_cat(result, m); 6895 6896 /* create lifetime extension (current and soft) */ 6897 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6898 m = key_alloc_mbuf(len); 6899 if (!m || m->m_next) { /*XXX*/ 6900 if (m) 6901 m_freem(m); 6902 error = ENOBUFS; 6903 goto fail; 6904 } 6905 memset(mtod(m, void *), 0, len); 6906 lt = mtod(m, struct sadb_lifetime *); 6907 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6908 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6909 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6910 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6911 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime 6912 + time_second - time_uptime; 6913 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime 6914 + time_second - time_uptime; 6915 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6916 memcpy(lt, sav->lft_s, sizeof(*lt)); 6917 m_cat(result, m); 6918 6919 /* set sadb_address for source */ 6920 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6921 &sav->sah->saidx.src.sa, 6922 FULLMASK, IPSEC_ULPROTO_ANY); 6923 if (!m) { 6924 error = ENOBUFS; 6925 goto fail; 6926 } 6927 m_cat(result, m); 6928 6929 /* set sadb_address for destination */ 6930 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6931 &sav->sah->saidx.dst.sa, 6932 FULLMASK, IPSEC_ULPROTO_ANY); 6933 if (!m) { 6934 error = ENOBUFS; 6935 goto fail; 6936 } 6937 m_cat(result, m); 6938 6939 if ((result->m_flags & M_PKTHDR) == 0) { 6940 error = EINVAL; 6941 goto fail; 6942 } 6943 6944 if (result->m_len < sizeof(struct sadb_msg)) { 6945 result = m_pullup(result, sizeof(struct sadb_msg)); 6946 if (result == NULL) { 6947 error = ENOBUFS; 6948 goto fail; 6949 } 6950 } 6951 6952 result->m_pkthdr.len = 0; 6953 for (m = result; m; m = m->m_next) 6954 result->m_pkthdr.len += m->m_len; 6955 6956 mtod(result, struct sadb_msg *)->sadb_msg_len = 6957 PFKEY_UNIT64(result->m_pkthdr.len); 6958 6959 splx(s); 6960 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6961 6962 fail: 6963 if (result) 6964 m_freem(result); 6965 splx(s); 6966 return error; 6967 } 6968 6969 /* 6970 * SADB_FLUSH processing 6971 * receive 6972 * <base> 6973 * from the ikmpd, and free all entries in secastree. 6974 * and send, 6975 * <base> 6976 * to the ikmpd. 6977 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6978 * 6979 * m will always be freed. 6980 */ 6981 static int 6982 key_flush(struct socket *so, struct mbuf *m, 6983 const struct sadb_msghdr *mhp) 6984 { 6985 struct sadb_msg *newmsg; 6986 struct secashead *sah, *nextsah; 6987 struct secasvar *sav, *nextsav; 6988 u_int16_t proto; 6989 u_int8_t state; 6990 u_int stateidx; 6991 6992 /* sanity check */ 6993 if (so == NULL || mhp == NULL || mhp->msg == NULL) 6994 panic("key_flush: NULL pointer is passed"); 6995 6996 /* map satype to proto */ 6997 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6998 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6999 return key_senderror(so, m, EINVAL); 7000 } 7001 7002 /* no SATYPE specified, i.e. flushing all SA. */ 7003 for (sah = LIST_FIRST(&sahtree); 7004 sah != NULL; 7005 sah = nextsah) { 7006 nextsah = LIST_NEXT(sah, chain); 7007 7008 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7009 && proto != sah->saidx.proto) 7010 continue; 7011 7012 for (stateidx = 0; 7013 stateidx < _ARRAYLEN(saorder_state_alive); 7014 stateidx++) { 7015 state = saorder_state_any[stateidx]; 7016 for (sav = LIST_FIRST(&sah->savtree[state]); 7017 sav != NULL; 7018 sav = nextsav) { 7019 7020 nextsav = LIST_NEXT(sav, chain); 7021 7022 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7023 KEY_FREESAV(&sav); 7024 } 7025 } 7026 7027 sah->state = SADB_SASTATE_DEAD; 7028 } 7029 7030 if (m->m_len < sizeof(struct sadb_msg) || 7031 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7032 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 7033 return key_senderror(so, m, ENOBUFS); 7034 } 7035 7036 if (m->m_next) 7037 m_freem(m->m_next); 7038 m->m_next = NULL; 7039 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7040 newmsg = mtod(m, struct sadb_msg *); 7041 newmsg->sadb_msg_errno = 0; 7042 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7043 7044 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7045 } 7046 7047 7048 static struct mbuf * 7049 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 7050 { 7051 struct secashead *sah; 7052 struct secasvar *sav; 7053 u_int16_t proto; 7054 u_int stateidx; 7055 u_int8_t satype; 7056 u_int8_t state; 7057 int cnt; 7058 struct mbuf *m, *n, *prev; 7059 int totlen; 7060 7061 *lenp = 0; 7062 7063 /* map satype to proto */ 7064 if ((proto = key_satype2proto(req_satype)) == 0) { 7065 *errorp = EINVAL; 7066 return (NULL); 7067 } 7068 7069 /* count sav entries to be sent to userland. */ 7070 cnt = 0; 7071 LIST_FOREACH(sah, &sahtree, chain) { 7072 if (req_satype != SADB_SATYPE_UNSPEC && 7073 proto != sah->saidx.proto) 7074 continue; 7075 7076 for (stateidx = 0; 7077 stateidx < _ARRAYLEN(saorder_state_any); 7078 stateidx++) { 7079 state = saorder_state_any[stateidx]; 7080 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7081 cnt++; 7082 } 7083 } 7084 } 7085 7086 if (cnt == 0) { 7087 *errorp = ENOENT; 7088 return (NULL); 7089 } 7090 7091 /* send this to the userland, one at a time. */ 7092 m = NULL; 7093 prev = m; 7094 LIST_FOREACH(sah, &sahtree, chain) { 7095 if (req_satype != SADB_SATYPE_UNSPEC && 7096 proto != sah->saidx.proto) 7097 continue; 7098 7099 /* map proto to satype */ 7100 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7101 m_freem(m); 7102 *errorp = EINVAL; 7103 return (NULL); 7104 } 7105 7106 for (stateidx = 0; 7107 stateidx < _ARRAYLEN(saorder_state_any); 7108 stateidx++) { 7109 state = saorder_state_any[stateidx]; 7110 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7111 n = key_setdumpsa(sav, SADB_DUMP, satype, 7112 --cnt, pid); 7113 if (!n) { 7114 m_freem(m); 7115 *errorp = ENOBUFS; 7116 return (NULL); 7117 } 7118 7119 totlen += n->m_pkthdr.len; 7120 if (!m) 7121 m = n; 7122 else 7123 prev->m_nextpkt = n; 7124 prev = n; 7125 } 7126 } 7127 } 7128 7129 if (!m) { 7130 *errorp = EINVAL; 7131 return (NULL); 7132 } 7133 7134 if ((m->m_flags & M_PKTHDR) != 0) { 7135 m->m_pkthdr.len = 0; 7136 for (n = m; n; n = n->m_next) 7137 m->m_pkthdr.len += n->m_len; 7138 } 7139 7140 *errorp = 0; 7141 return (m); 7142 } 7143 7144 /* 7145 * SADB_DUMP processing 7146 * dump all entries including status of DEAD in SAD. 7147 * receive 7148 * <base> 7149 * from the ikmpd, and dump all secasvar leaves 7150 * and send, 7151 * <base> ..... 7152 * to the ikmpd. 7153 * 7154 * m will always be freed. 7155 */ 7156 static int 7157 key_dump(struct socket *so, struct mbuf *m0, 7158 const struct sadb_msghdr *mhp) 7159 { 7160 u_int16_t proto; 7161 u_int8_t satype; 7162 struct mbuf *n; 7163 int s; 7164 int error, len, ok; 7165 7166 /* sanity check */ 7167 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 7168 panic("key_dump: NULL pointer is passed"); 7169 7170 /* map satype to proto */ 7171 satype = mhp->msg->sadb_msg_satype; 7172 if ((proto = key_satype2proto(satype)) == 0) { 7173 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 7174 return key_senderror(so, m0, EINVAL); 7175 } 7176 7177 /* 7178 * If the requestor has insufficient socket-buffer space 7179 * for the entire chain, nobody gets any response to the DUMP. 7180 * XXX For now, only the requestor ever gets anything. 7181 * Moreover, if the requestor has any space at all, they receive 7182 * the entire chain, otherwise the request is refused with ENOBUFS. 7183 */ 7184 if (sbspace(&so->so_rcv) <= 0) { 7185 return key_senderror(so, m0, ENOBUFS); 7186 } 7187 7188 s = splsoftnet(); 7189 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7190 splx(s); 7191 7192 if (n == NULL) { 7193 return key_senderror(so, m0, ENOENT); 7194 } 7195 { 7196 uint64_t *ps = PFKEY_STAT_GETREF(); 7197 ps[PFKEY_STAT_IN_TOTAL]++; 7198 ps[PFKEY_STAT_IN_BYTES] += len; 7199 PFKEY_STAT_PUTREF(); 7200 } 7201 7202 /* 7203 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7204 * The requestor receives either the entire chain, or an 7205 * error message with ENOBUFS. 7206 * 7207 * sbappendaddrchain() takes the chain of entries, one 7208 * packet-record per SPD entry, prepends the key_src sockaddr 7209 * to each packet-record, links the sockaddr mbufs into a new 7210 * list of records, then appends the entire resulting 7211 * list to the requesting socket. 7212 */ 7213 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 7214 n, SB_PRIO_ONESHOT_OVERFLOW); 7215 7216 if (!ok) { 7217 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7218 m_freem(n); 7219 return key_senderror(so, m0, ENOBUFS); 7220 } 7221 7222 m_freem(m0); 7223 return 0; 7224 } 7225 7226 /* 7227 * SADB_X_PROMISC processing 7228 * 7229 * m will always be freed. 7230 */ 7231 static int 7232 key_promisc(struct socket *so, struct mbuf *m, 7233 const struct sadb_msghdr *mhp) 7234 { 7235 int olen; 7236 7237 /* sanity check */ 7238 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 7239 panic("key_promisc: NULL pointer is passed"); 7240 7241 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7242 7243 if (olen < sizeof(struct sadb_msg)) { 7244 #if 1 7245 return key_senderror(so, m, EINVAL); 7246 #else 7247 m_freem(m); 7248 return 0; 7249 #endif 7250 } else if (olen == sizeof(struct sadb_msg)) { 7251 /* enable/disable promisc mode */ 7252 struct keycb *kp; 7253 7254 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7255 return key_senderror(so, m, EINVAL); 7256 mhp->msg->sadb_msg_errno = 0; 7257 switch (mhp->msg->sadb_msg_satype) { 7258 case 0: 7259 case 1: 7260 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7261 break; 7262 default: 7263 return key_senderror(so, m, EINVAL); 7264 } 7265 7266 /* send the original message back to everyone */ 7267 mhp->msg->sadb_msg_errno = 0; 7268 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7269 } else { 7270 /* send packet as is */ 7271 7272 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7273 7274 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7275 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7276 } 7277 } 7278 7279 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7280 const struct sadb_msghdr *) = { 7281 NULL, /* SADB_RESERVED */ 7282 key_getspi, /* SADB_GETSPI */ 7283 key_update, /* SADB_UPDATE */ 7284 key_add, /* SADB_ADD */ 7285 key_delete, /* SADB_DELETE */ 7286 key_get, /* SADB_GET */ 7287 key_acquire2, /* SADB_ACQUIRE */ 7288 key_register, /* SADB_REGISTER */ 7289 NULL, /* SADB_EXPIRE */ 7290 key_flush, /* SADB_FLUSH */ 7291 key_dump, /* SADB_DUMP */ 7292 key_promisc, /* SADB_X_PROMISC */ 7293 NULL, /* SADB_X_PCHANGE */ 7294 key_spdadd, /* SADB_X_SPDUPDATE */ 7295 key_spdadd, /* SADB_X_SPDADD */ 7296 key_spddelete, /* SADB_X_SPDDELETE */ 7297 key_spdget, /* SADB_X_SPDGET */ 7298 NULL, /* SADB_X_SPDACQUIRE */ 7299 key_spddump, /* SADB_X_SPDDUMP */ 7300 key_spdflush, /* SADB_X_SPDFLUSH */ 7301 key_spdadd, /* SADB_X_SPDSETIDX */ 7302 NULL, /* SADB_X_SPDEXPIRE */ 7303 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7304 #ifdef IPSEC_NAT_T 7305 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7306 #endif 7307 }; 7308 7309 /* 7310 * parse sadb_msg buffer to process PFKEYv2, 7311 * and create a data to response if needed. 7312 * I think to be dealed with mbuf directly. 7313 * IN: 7314 * msgp : pointer to pointer to a received buffer pulluped. 7315 * This is rewrited to response. 7316 * so : pointer to socket. 7317 * OUT: 7318 * length for buffer to send to user process. 7319 */ 7320 int 7321 key_parse(struct mbuf *m, struct socket *so) 7322 { 7323 struct sadb_msg *msg; 7324 struct sadb_msghdr mh; 7325 u_int orglen; 7326 int error; 7327 int target; 7328 7329 /* sanity check */ 7330 if (m == NULL || so == NULL) 7331 panic("key_parse: NULL pointer is passed"); 7332 7333 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7334 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7335 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 7336 kdebug_sadb(msg)); 7337 #endif 7338 7339 if (m->m_len < sizeof(struct sadb_msg)) { 7340 m = m_pullup(m, sizeof(struct sadb_msg)); 7341 if (!m) 7342 return ENOBUFS; 7343 } 7344 msg = mtod(m, struct sadb_msg *); 7345 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7346 target = KEY_SENDUP_ONE; 7347 7348 if ((m->m_flags & M_PKTHDR) == 0 || 7349 m->m_pkthdr.len != m->m_pkthdr.len) { 7350 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 7351 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7352 error = EINVAL; 7353 goto senderror; 7354 } 7355 7356 if (msg->sadb_msg_version != PF_KEY_V2) { 7357 ipseclog((LOG_DEBUG, 7358 "key_parse: PF_KEY version %u is mismatched.\n", 7359 msg->sadb_msg_version)); 7360 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7361 error = EINVAL; 7362 goto senderror; 7363 } 7364 7365 if (msg->sadb_msg_type > SADB_MAX) { 7366 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7367 msg->sadb_msg_type)); 7368 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7369 error = EINVAL; 7370 goto senderror; 7371 } 7372 7373 /* for old-fashioned code - should be nuked */ 7374 if (m->m_pkthdr.len > MCLBYTES) { 7375 m_freem(m); 7376 return ENOBUFS; 7377 } 7378 if (m->m_next) { 7379 struct mbuf *n; 7380 7381 MGETHDR(n, M_DONTWAIT, MT_DATA); 7382 if (n && m->m_pkthdr.len > MHLEN) { 7383 MCLGET(n, M_DONTWAIT); 7384 if ((n->m_flags & M_EXT) == 0) { 7385 m_free(n); 7386 n = NULL; 7387 } 7388 } 7389 if (!n) { 7390 m_freem(m); 7391 return ENOBUFS; 7392 } 7393 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7394 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7395 n->m_next = NULL; 7396 m_freem(m); 7397 m = n; 7398 } 7399 7400 /* align the mbuf chain so that extensions are in contiguous region. */ 7401 error = key_align(m, &mh); 7402 if (error) 7403 return error; 7404 7405 if (m->m_next) { /*XXX*/ 7406 m_freem(m); 7407 return ENOBUFS; 7408 } 7409 7410 msg = mh.msg; 7411 7412 /* check SA type */ 7413 switch (msg->sadb_msg_satype) { 7414 case SADB_SATYPE_UNSPEC: 7415 switch (msg->sadb_msg_type) { 7416 case SADB_GETSPI: 7417 case SADB_UPDATE: 7418 case SADB_ADD: 7419 case SADB_DELETE: 7420 case SADB_GET: 7421 case SADB_ACQUIRE: 7422 case SADB_EXPIRE: 7423 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7424 "when msg type=%u.\n", msg->sadb_msg_type)); 7425 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7426 error = EINVAL; 7427 goto senderror; 7428 } 7429 break; 7430 case SADB_SATYPE_AH: 7431 case SADB_SATYPE_ESP: 7432 case SADB_X_SATYPE_IPCOMP: 7433 case SADB_X_SATYPE_TCPSIGNATURE: 7434 switch (msg->sadb_msg_type) { 7435 case SADB_X_SPDADD: 7436 case SADB_X_SPDDELETE: 7437 case SADB_X_SPDGET: 7438 case SADB_X_SPDDUMP: 7439 case SADB_X_SPDFLUSH: 7440 case SADB_X_SPDSETIDX: 7441 case SADB_X_SPDUPDATE: 7442 case SADB_X_SPDDELETE2: 7443 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7444 msg->sadb_msg_type)); 7445 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7446 error = EINVAL; 7447 goto senderror; 7448 } 7449 break; 7450 case SADB_SATYPE_RSVP: 7451 case SADB_SATYPE_OSPFV2: 7452 case SADB_SATYPE_RIPV2: 7453 case SADB_SATYPE_MIP: 7454 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7455 msg->sadb_msg_satype)); 7456 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7457 error = EOPNOTSUPP; 7458 goto senderror; 7459 case 1: /* XXX: What does it do? */ 7460 if (msg->sadb_msg_type == SADB_X_PROMISC) 7461 break; 7462 /*FALLTHROUGH*/ 7463 default: 7464 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7465 msg->sadb_msg_satype)); 7466 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7467 error = EINVAL; 7468 goto senderror; 7469 } 7470 7471 /* check field of upper layer protocol and address family */ 7472 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7473 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7474 struct sadb_address *src0, *dst0; 7475 u_int plen; 7476 7477 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7478 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7479 7480 /* check upper layer protocol */ 7481 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7482 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7483 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7484 error = EINVAL; 7485 goto senderror; 7486 } 7487 7488 /* check family */ 7489 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7490 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7491 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7492 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7493 error = EINVAL; 7494 goto senderror; 7495 } 7496 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7497 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7498 ipseclog((LOG_DEBUG, 7499 "key_parse: address struct size mismatched.\n")); 7500 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7501 error = EINVAL; 7502 goto senderror; 7503 } 7504 7505 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7506 case AF_INET: 7507 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7508 sizeof(struct sockaddr_in)) { 7509 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7510 error = EINVAL; 7511 goto senderror; 7512 } 7513 break; 7514 case AF_INET6: 7515 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7516 sizeof(struct sockaddr_in6)) { 7517 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7518 error = EINVAL; 7519 goto senderror; 7520 } 7521 break; 7522 default: 7523 ipseclog((LOG_DEBUG, 7524 "key_parse: unsupported address family.\n")); 7525 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7526 error = EAFNOSUPPORT; 7527 goto senderror; 7528 } 7529 7530 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7531 case AF_INET: 7532 plen = sizeof(struct in_addr) << 3; 7533 break; 7534 case AF_INET6: 7535 plen = sizeof(struct in6_addr) << 3; 7536 break; 7537 default: 7538 plen = 0; /*fool gcc*/ 7539 break; 7540 } 7541 7542 /* check max prefix length */ 7543 if (src0->sadb_address_prefixlen > plen || 7544 dst0->sadb_address_prefixlen > plen) { 7545 ipseclog((LOG_DEBUG, 7546 "key_parse: illegal prefixlen.\n")); 7547 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7548 error = EINVAL; 7549 goto senderror; 7550 } 7551 7552 /* 7553 * prefixlen == 0 is valid because there can be a case when 7554 * all addresses are matched. 7555 */ 7556 } 7557 7558 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7559 key_typesw[msg->sadb_msg_type] == NULL) { 7560 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7561 error = EINVAL; 7562 goto senderror; 7563 } 7564 7565 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7566 7567 senderror: 7568 msg->sadb_msg_errno = error; 7569 return key_sendup_mbuf(so, m, target); 7570 } 7571 7572 static int 7573 key_senderror(struct socket *so, struct mbuf *m, int code) 7574 { 7575 struct sadb_msg *msg; 7576 7577 if (m->m_len < sizeof(struct sadb_msg)) 7578 panic("invalid mbuf passed to key_senderror"); 7579 7580 msg = mtod(m, struct sadb_msg *); 7581 msg->sadb_msg_errno = code; 7582 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7583 } 7584 7585 /* 7586 * set the pointer to each header into message buffer. 7587 * m will be freed on error. 7588 * XXX larger-than-MCLBYTES extension? 7589 */ 7590 static int 7591 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7592 { 7593 struct mbuf *n; 7594 struct sadb_ext *ext; 7595 size_t off, end; 7596 int extlen; 7597 int toff; 7598 7599 /* sanity check */ 7600 if (m == NULL || mhp == NULL) 7601 panic("key_align: NULL pointer is passed"); 7602 if (m->m_len < sizeof(struct sadb_msg)) 7603 panic("invalid mbuf passed to key_align"); 7604 7605 /* initialize */ 7606 memset(mhp, 0, sizeof(*mhp)); 7607 7608 mhp->msg = mtod(m, struct sadb_msg *); 7609 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7610 7611 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7612 extlen = end; /*just in case extlen is not updated*/ 7613 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7614 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7615 if (!n) { 7616 /* m is already freed */ 7617 return ENOBUFS; 7618 } 7619 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7620 7621 /* set pointer */ 7622 switch (ext->sadb_ext_type) { 7623 case SADB_EXT_SA: 7624 case SADB_EXT_ADDRESS_SRC: 7625 case SADB_EXT_ADDRESS_DST: 7626 case SADB_EXT_ADDRESS_PROXY: 7627 case SADB_EXT_LIFETIME_CURRENT: 7628 case SADB_EXT_LIFETIME_HARD: 7629 case SADB_EXT_LIFETIME_SOFT: 7630 case SADB_EXT_KEY_AUTH: 7631 case SADB_EXT_KEY_ENCRYPT: 7632 case SADB_EXT_IDENTITY_SRC: 7633 case SADB_EXT_IDENTITY_DST: 7634 case SADB_EXT_SENSITIVITY: 7635 case SADB_EXT_PROPOSAL: 7636 case SADB_EXT_SUPPORTED_AUTH: 7637 case SADB_EXT_SUPPORTED_ENCRYPT: 7638 case SADB_EXT_SPIRANGE: 7639 case SADB_X_EXT_POLICY: 7640 case SADB_X_EXT_SA2: 7641 #ifdef IPSEC_NAT_T 7642 case SADB_X_EXT_NAT_T_TYPE: 7643 case SADB_X_EXT_NAT_T_SPORT: 7644 case SADB_X_EXT_NAT_T_DPORT: 7645 case SADB_X_EXT_NAT_T_OAI: 7646 case SADB_X_EXT_NAT_T_OAR: 7647 case SADB_X_EXT_NAT_T_FRAG: 7648 #endif 7649 /* duplicate check */ 7650 /* 7651 * XXX Are there duplication payloads of either 7652 * KEY_AUTH or KEY_ENCRYPT ? 7653 */ 7654 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7655 ipseclog((LOG_DEBUG, 7656 "key_align: duplicate ext_type %u " 7657 "is passed.\n", ext->sadb_ext_type)); 7658 m_freem(m); 7659 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7660 return EINVAL; 7661 } 7662 break; 7663 default: 7664 ipseclog((LOG_DEBUG, 7665 "key_align: invalid ext_type %u is passed.\n", 7666 ext->sadb_ext_type)); 7667 m_freem(m); 7668 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7669 return EINVAL; 7670 } 7671 7672 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7673 7674 if (key_validate_ext(ext, extlen)) { 7675 m_freem(m); 7676 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7677 return EINVAL; 7678 } 7679 7680 n = m_pulldown(m, off, extlen, &toff); 7681 if (!n) { 7682 /* m is already freed */ 7683 return ENOBUFS; 7684 } 7685 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7686 7687 mhp->ext[ext->sadb_ext_type] = ext; 7688 mhp->extoff[ext->sadb_ext_type] = off; 7689 mhp->extlen[ext->sadb_ext_type] = extlen; 7690 } 7691 7692 if (off != end) { 7693 m_freem(m); 7694 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7695 return EINVAL; 7696 } 7697 7698 return 0; 7699 } 7700 7701 static int 7702 key_validate_ext(const struct sadb_ext *ext, int len) 7703 { 7704 const struct sockaddr *sa; 7705 enum { NONE, ADDR } checktype = NONE; 7706 int baselen = 0; 7707 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7708 7709 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7710 return EINVAL; 7711 7712 /* if it does not match minimum/maximum length, bail */ 7713 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7714 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7715 return EINVAL; 7716 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7717 return EINVAL; 7718 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7719 return EINVAL; 7720 7721 /* more checks based on sadb_ext_type XXX need more */ 7722 switch (ext->sadb_ext_type) { 7723 case SADB_EXT_ADDRESS_SRC: 7724 case SADB_EXT_ADDRESS_DST: 7725 case SADB_EXT_ADDRESS_PROXY: 7726 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7727 checktype = ADDR; 7728 break; 7729 case SADB_EXT_IDENTITY_SRC: 7730 case SADB_EXT_IDENTITY_DST: 7731 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7732 SADB_X_IDENTTYPE_ADDR) { 7733 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7734 checktype = ADDR; 7735 } else 7736 checktype = NONE; 7737 break; 7738 default: 7739 checktype = NONE; 7740 break; 7741 } 7742 7743 switch (checktype) { 7744 case NONE: 7745 break; 7746 case ADDR: 7747 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7748 if (len < baselen + sal) 7749 return EINVAL; 7750 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7751 return EINVAL; 7752 break; 7753 } 7754 7755 return 0; 7756 } 7757 7758 static int 7759 key_do_init(void) 7760 { 7761 int i; 7762 7763 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7764 7765 callout_init(&key_timehandler_ch, 0); 7766 7767 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7768 LIST_INIT(&sptree[i]); 7769 } 7770 7771 LIST_INIT(&sahtree); 7772 7773 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7774 LIST_INIT(®tree[i]); 7775 } 7776 7777 #ifndef IPSEC_NONBLOCK_ACQUIRE 7778 LIST_INIT(&acqtree); 7779 #endif 7780 LIST_INIT(&spacqtree); 7781 7782 /* system default */ 7783 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7784 ip4_def_policy.refcnt++; /*never reclaim this*/ 7785 7786 #ifdef INET6 7787 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7788 ip6_def_policy.refcnt++; /*never reclaim this*/ 7789 #endif 7790 7791 7792 #ifndef IPSEC_DEBUG2 7793 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7794 #endif /*IPSEC_DEBUG2*/ 7795 7796 /* initialize key statistics */ 7797 keystat.getspi_count = 1; 7798 7799 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7800 7801 return (0); 7802 } 7803 7804 void 7805 key_init(void) 7806 { 7807 static ONCE_DECL(key_init_once); 7808 7809 RUN_ONCE(&key_init_once, key_do_init); 7810 } 7811 7812 /* 7813 * XXX: maybe This function is called after INBOUND IPsec processing. 7814 * 7815 * Special check for tunnel-mode packets. 7816 * We must make some checks for consistency between inner and outer IP header. 7817 * 7818 * xxx more checks to be provided 7819 */ 7820 int 7821 key_checktunnelsanity( 7822 struct secasvar *sav, 7823 u_int family, 7824 void *src, 7825 void *dst 7826 ) 7827 { 7828 /* sanity check */ 7829 if (sav->sah == NULL) 7830 panic("sav->sah == NULL at key_checktunnelsanity"); 7831 7832 /* XXX: check inner IP header */ 7833 7834 return 1; 7835 } 7836 7837 #if 0 7838 #define hostnamelen strlen(hostname) 7839 7840 /* 7841 * Get FQDN for the host. 7842 * If the administrator configured hostname (by hostname(1)) without 7843 * domain name, returns nothing. 7844 */ 7845 static const char * 7846 key_getfqdn(void) 7847 { 7848 int i; 7849 int hasdot; 7850 static char fqdn[MAXHOSTNAMELEN + 1]; 7851 7852 if (!hostnamelen) 7853 return NULL; 7854 7855 /* check if it comes with domain name. */ 7856 hasdot = 0; 7857 for (i = 0; i < hostnamelen; i++) { 7858 if (hostname[i] == '.') 7859 hasdot++; 7860 } 7861 if (!hasdot) 7862 return NULL; 7863 7864 /* NOTE: hostname may not be NUL-terminated. */ 7865 memset(fqdn, 0, sizeof(fqdn)); 7866 memcpy(fqdn, hostname, hostnamelen); 7867 fqdn[hostnamelen] = '\0'; 7868 return fqdn; 7869 } 7870 7871 /* 7872 * get username@FQDN for the host/user. 7873 */ 7874 static const char * 7875 key_getuserfqdn(void) 7876 { 7877 const char *host; 7878 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7879 struct proc *p = curproc; 7880 char *q; 7881 7882 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7883 return NULL; 7884 if (!(host = key_getfqdn())) 7885 return NULL; 7886 7887 /* NOTE: s_login may not be-NUL terminated. */ 7888 memset(userfqdn, 0, sizeof(userfqdn)); 7889 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7890 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7891 q = userfqdn + strlen(userfqdn); 7892 *q++ = '@'; 7893 memcpy(q, host, strlen(host)); 7894 q += strlen(host); 7895 *q++ = '\0'; 7896 7897 return userfqdn; 7898 } 7899 #endif 7900 7901 /* record data transfer on SA, and update timestamps */ 7902 void 7903 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7904 { 7905 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7906 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7907 if (!sav->lft_c) 7908 return; 7909 7910 /* 7911 * XXX Currently, there is a difference of bytes size 7912 * between inbound and outbound processing. 7913 */ 7914 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7915 /* to check bytes lifetime is done in key_timehandler(). */ 7916 7917 /* 7918 * We use the number of packets as the unit of 7919 * sadb_lifetime_allocations. We increment the variable 7920 * whenever {esp,ah}_{in,out}put is called. 7921 */ 7922 sav->lft_c->sadb_lifetime_allocations++; 7923 /* XXX check for expires? */ 7924 7925 /* 7926 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7927 * in seconds. HARD and SOFT lifetime are measured by the time 7928 * difference (again in seconds) from sadb_lifetime_usetime. 7929 * 7930 * usetime 7931 * v expire expire 7932 * -----+-----+--------+---> t 7933 * <--------------> HARD 7934 * <-----> SOFT 7935 */ 7936 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7937 /* XXX check for expires? */ 7938 7939 return; 7940 } 7941 7942 /* dumb version */ 7943 void 7944 key_sa_routechange(struct sockaddr *dst) 7945 { 7946 struct secashead *sah; 7947 struct route *ro; 7948 const struct sockaddr *sa; 7949 7950 LIST_FOREACH(sah, &sahtree, chain) { 7951 ro = &sah->sa_route; 7952 sa = rtcache_getdst(ro); 7953 if (sa != NULL && dst->sa_len == sa->sa_len && 7954 memcmp(dst, sa, dst->sa_len) == 0) 7955 rtcache_free(ro); 7956 } 7957 7958 return; 7959 } 7960 7961 static void 7962 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7963 { 7964 if (sav == NULL) 7965 panic("key_sa_chgstate called with sav == NULL"); 7966 7967 if (sav->state == state) 7968 return; 7969 7970 if (__LIST_CHAINED(sav)) 7971 LIST_REMOVE(sav, chain); 7972 7973 sav->state = state; 7974 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7975 } 7976 7977 /* XXX too much? */ 7978 static struct mbuf * 7979 key_alloc_mbuf(int l) 7980 { 7981 struct mbuf *m = NULL, *n; 7982 int len, t; 7983 7984 len = l; 7985 while (len > 0) { 7986 MGET(n, M_DONTWAIT, MT_DATA); 7987 if (n && len > MLEN) 7988 MCLGET(n, M_DONTWAIT); 7989 if (!n) { 7990 m_freem(m); 7991 return NULL; 7992 } 7993 7994 n->m_next = NULL; 7995 n->m_len = 0; 7996 n->m_len = M_TRAILINGSPACE(n); 7997 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7998 if (n->m_len > len) { 7999 t = (n->m_len - len) & ~(sizeof(long) - 1); 8000 n->m_data += t; 8001 n->m_len = len; 8002 } 8003 8004 len -= n->m_len; 8005 8006 if (m) 8007 m_cat(m, n); 8008 else 8009 m = n; 8010 } 8011 8012 return m; 8013 } 8014 8015 static struct mbuf * 8016 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 8017 { 8018 struct secashead *sah; 8019 struct secasvar *sav; 8020 u_int16_t proto; 8021 u_int stateidx; 8022 u_int8_t satype; 8023 u_int8_t state; 8024 int cnt; 8025 struct mbuf *m, *n; 8026 8027 /* map satype to proto */ 8028 if ((proto = key_satype2proto(req_satype)) == 0) { 8029 *errorp = EINVAL; 8030 return (NULL); 8031 } 8032 8033 /* count sav entries to be sent to the userland. */ 8034 cnt = 0; 8035 LIST_FOREACH(sah, &sahtree, chain) { 8036 if (req_satype != SADB_SATYPE_UNSPEC && 8037 proto != sah->saidx.proto) 8038 continue; 8039 8040 for (stateidx = 0; 8041 stateidx < _ARRAYLEN(saorder_state_any); 8042 stateidx++) { 8043 state = saorder_state_any[stateidx]; 8044 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8045 cnt++; 8046 } 8047 } 8048 } 8049 8050 if (cnt == 0) { 8051 *errorp = ENOENT; 8052 return (NULL); 8053 } 8054 8055 /* send this to the userland, one at a time. */ 8056 m = NULL; 8057 LIST_FOREACH(sah, &sahtree, chain) { 8058 if (req_satype != SADB_SATYPE_UNSPEC && 8059 proto != sah->saidx.proto) 8060 continue; 8061 8062 /* map proto to satype */ 8063 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 8064 m_freem(m); 8065 *errorp = EINVAL; 8066 return (NULL); 8067 } 8068 8069 for (stateidx = 0; 8070 stateidx < _ARRAYLEN(saorder_state_any); 8071 stateidx++) { 8072 state = saorder_state_any[stateidx]; 8073 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8074 n = key_setdumpsa(sav, SADB_DUMP, satype, 8075 --cnt, pid); 8076 if (!n) { 8077 m_freem(m); 8078 *errorp = ENOBUFS; 8079 return (NULL); 8080 } 8081 8082 if (!m) 8083 m = n; 8084 else 8085 m_cat(m, n); 8086 } 8087 } 8088 } 8089 8090 if (!m) { 8091 *errorp = EINVAL; 8092 return (NULL); 8093 } 8094 8095 if ((m->m_flags & M_PKTHDR) != 0) { 8096 m->m_pkthdr.len = 0; 8097 for (n = m; n; n = n->m_next) 8098 m->m_pkthdr.len += n->m_len; 8099 } 8100 8101 *errorp = 0; 8102 return (m); 8103 } 8104 8105 static struct mbuf * 8106 key_setspddump(int *errorp, pid_t pid) 8107 { 8108 struct secpolicy *sp; 8109 int cnt; 8110 u_int dir; 8111 struct mbuf *m, *n; 8112 8113 /* search SPD entry and get buffer size. */ 8114 cnt = 0; 8115 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8116 LIST_FOREACH(sp, &sptree[dir], chain) { 8117 cnt++; 8118 } 8119 } 8120 8121 if (cnt == 0) { 8122 *errorp = ENOENT; 8123 return (NULL); 8124 } 8125 8126 m = NULL; 8127 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8128 LIST_FOREACH(sp, &sptree[dir], chain) { 8129 --cnt; 8130 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8131 8132 if (!n) { 8133 *errorp = ENOBUFS; 8134 m_freem(m); 8135 return (NULL); 8136 } 8137 if (!m) 8138 m = n; 8139 else { 8140 m->m_pkthdr.len += n->m_pkthdr.len; 8141 m_cat(m, n); 8142 } 8143 } 8144 } 8145 8146 *errorp = 0; 8147 return (m); 8148 } 8149 8150 static int 8151 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8152 { 8153 struct mbuf *m, *n; 8154 int err2 = 0; 8155 char *p, *ep; 8156 size_t len; 8157 int s, error; 8158 8159 if (newp) 8160 return (EPERM); 8161 if (namelen != 1) 8162 return (EINVAL); 8163 8164 s = splsoftnet(); 8165 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8166 splx(s); 8167 if (!m) 8168 return (error); 8169 if (!oldp) 8170 *oldlenp = m->m_pkthdr.len; 8171 else { 8172 p = oldp; 8173 if (*oldlenp < m->m_pkthdr.len) { 8174 err2 = ENOMEM; 8175 ep = p + *oldlenp; 8176 } else { 8177 *oldlenp = m->m_pkthdr.len; 8178 ep = p + m->m_pkthdr.len; 8179 } 8180 for (n = m; n; n = n->m_next) { 8181 len = (ep - p < n->m_len) ? 8182 ep - p : n->m_len; 8183 error = copyout(mtod(n, const void *), p, len); 8184 p += len; 8185 if (error) 8186 break; 8187 } 8188 if (error == 0) 8189 error = err2; 8190 } 8191 m_freem(m); 8192 8193 return (error); 8194 } 8195 8196 static int 8197 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8198 { 8199 struct mbuf *m, *n; 8200 int err2 = 0; 8201 char *p, *ep; 8202 size_t len; 8203 int s, error; 8204 8205 if (newp) 8206 return (EPERM); 8207 if (namelen != 0) 8208 return (EINVAL); 8209 8210 s = splsoftnet(); 8211 m = key_setspddump(&error, l->l_proc->p_pid); 8212 splx(s); 8213 if (!m) 8214 return (error); 8215 if (!oldp) 8216 *oldlenp = m->m_pkthdr.len; 8217 else { 8218 p = oldp; 8219 if (*oldlenp < m->m_pkthdr.len) { 8220 err2 = ENOMEM; 8221 ep = p + *oldlenp; 8222 } else { 8223 *oldlenp = m->m_pkthdr.len; 8224 ep = p + m->m_pkthdr.len; 8225 } 8226 for (n = m; n; n = n->m_next) { 8227 len = (ep - p < n->m_len) ? 8228 ep - p : n->m_len; 8229 error = copyout(mtod(n, const void *), p, len); 8230 p += len; 8231 if (error) 8232 break; 8233 } 8234 if (error == 0) 8235 error = err2; 8236 } 8237 m_freem(m); 8238 8239 return (error); 8240 } 8241 8242 /* 8243 * Create sysctl tree for native FAST_IPSEC key knobs, originally 8244 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8245 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8246 * and in any case the part of our sysctl namespace used for dumping the 8247 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8248 * namespace, for API reasons. 8249 * 8250 * Pending a consensus on the right way to fix this, add a level of 8251 * indirection in how we number the `native' FAST_IPSEC key nodes; 8252 * and (as requested by Andrew Brown) move registration of the 8253 * KAME-compatible names to a separate function. 8254 */ 8255 #if 0 8256 # define FAST_IPSEC_PFKEY PF_KEY_V2 8257 # define FAST_IPSEC_PFKEY_NAME "keyv2" 8258 #else 8259 # define FAST_IPSEC_PFKEY PF_KEY 8260 # define FAST_IPSEC_PFKEY_NAME "key" 8261 #endif 8262 8263 static int 8264 sysctl_net_key_stats(SYSCTLFN_ARGS) 8265 { 8266 8267 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8268 } 8269 8270 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 8271 { 8272 8273 sysctl_createv(clog, 0, NULL, NULL, 8274 CTLFLAG_PERMANENT, 8275 CTLTYPE_NODE, "net", NULL, 8276 NULL, 0, NULL, 0, 8277 CTL_NET, CTL_EOL); 8278 sysctl_createv(clog, 0, NULL, NULL, 8279 CTLFLAG_PERMANENT, 8280 CTLTYPE_NODE, FAST_IPSEC_PFKEY_NAME, NULL, 8281 NULL, 0, NULL, 0, 8282 CTL_NET, FAST_IPSEC_PFKEY, CTL_EOL); 8283 8284 sysctl_createv(clog, 0, NULL, NULL, 8285 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8286 CTLTYPE_INT, "debug", NULL, 8287 NULL, 0, &key_debug_level, 0, 8288 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8289 sysctl_createv(clog, 0, NULL, NULL, 8290 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8291 CTLTYPE_INT, "spi_try", NULL, 8292 NULL, 0, &key_spi_trycnt, 0, 8293 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8294 sysctl_createv(clog, 0, NULL, NULL, 8295 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8296 CTLTYPE_INT, "spi_min_value", NULL, 8297 NULL, 0, &key_spi_minval, 0, 8298 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8299 sysctl_createv(clog, 0, NULL, NULL, 8300 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8301 CTLTYPE_INT, "spi_max_value", NULL, 8302 NULL, 0, &key_spi_maxval, 0, 8303 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8304 sysctl_createv(clog, 0, NULL, NULL, 8305 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8306 CTLTYPE_INT, "random_int", NULL, 8307 NULL, 0, &key_int_random, 0, 8308 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8309 sysctl_createv(clog, 0, NULL, NULL, 8310 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8311 CTLTYPE_INT, "larval_lifetime", NULL, 8312 NULL, 0, &key_larval_lifetime, 0, 8313 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8314 sysctl_createv(clog, 0, NULL, NULL, 8315 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8316 CTLTYPE_INT, "blockacq_count", NULL, 8317 NULL, 0, &key_blockacq_count, 0, 8318 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8319 sysctl_createv(clog, 0, NULL, NULL, 8320 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8321 CTLTYPE_INT, "blockacq_lifetime", NULL, 8322 NULL, 0, &key_blockacq_lifetime, 0, 8323 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8324 sysctl_createv(clog, 0, NULL, NULL, 8325 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8326 CTLTYPE_INT, "esp_keymin", NULL, 8327 NULL, 0, &ipsec_esp_keymin, 0, 8328 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8329 sysctl_createv(clog, 0, NULL, NULL, 8330 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8331 CTLTYPE_INT, "prefered_oldsa", NULL, 8332 NULL, 0, &key_prefered_oldsa, 0, 8333 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8334 sysctl_createv(clog, 0, NULL, NULL, 8335 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8336 CTLTYPE_INT, "esp_auth", NULL, 8337 NULL, 0, &ipsec_esp_auth, 0, 8338 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8339 sysctl_createv(clog, 0, NULL, NULL, 8340 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8341 CTLTYPE_INT, "ah_keymin", NULL, 8342 NULL, 0, &ipsec_ah_keymin, 0, 8343 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8344 sysctl_createv(clog, 0, NULL, NULL, 8345 CTLFLAG_PERMANENT, 8346 CTLTYPE_STRUCT, "stats", 8347 SYSCTL_DESCR("PF_KEY statistics"), 8348 sysctl_net_key_stats, 0, NULL, 0, 8349 CTL_NET, FAST_IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8350 } 8351 8352 /* 8353 * Register sysctl names used by setkey(8). For historical reasons, 8354 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8355 * for both FAST_IPSEC and KAME IPSEC. 8356 */ 8357 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for FAST_IPSEC") 8358 { 8359 8360 /* Make sure net.key exists before we register nodes underneath it. */ 8361 sysctl_createv(clog, 0, NULL, NULL, 8362 CTLFLAG_PERMANENT, 8363 CTLTYPE_NODE, "net", NULL, 8364 NULL, 0, NULL, 0, 8365 CTL_NET, CTL_EOL); 8366 sysctl_createv(clog, 0, NULL, NULL, 8367 CTLFLAG_PERMANENT, 8368 CTLTYPE_NODE, "key", NULL, 8369 NULL, 0, NULL, 0, 8370 CTL_NET, PF_KEY, CTL_EOL); 8371 8372 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8373 sysctl_createv(clog, 0, NULL, NULL, 8374 CTLFLAG_PERMANENT, 8375 CTLTYPE_STRUCT, "dumpsa", NULL, 8376 sysctl_net_key_dumpsa, 0, NULL, 0, 8377 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8378 sysctl_createv(clog, 0, NULL, NULL, 8379 CTLFLAG_PERMANENT, 8380 CTLTYPE_STRUCT, "dumpsp", NULL, 8381 sysctl_net_key_dumpsp, 0, NULL, 0, 8382 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8383 } 8384
Indexes created Tue Oct 28 12:10:06 GMT 2025