key.c revision 1.53
1 /* $NetBSD: key.c,v 1.53 2008/04/24 11:38:38 ad 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 1.53 2008/04/24 11:38:38 ad 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 <machine/stdarg.h> 111 112 113 #include <net/net_osdep.h> 114 115 #define FULLMASK 0xff 116 #define _BITS(bytes) ((bytes) << 3) 117 118 percpu_t *pfkeystat_percpu; 119 120 /* 121 * Note on SA reference counting: 122 * - SAs that are not in DEAD state will have (total external reference + 1) 123 * following value in reference count field. they cannot be freed and are 124 * referenced from SA header. 125 * - SAs that are in DEAD state will have (total external reference) 126 * in reference count field. they are ready to be freed. reference from 127 * SA header will be removed in key_delsav(), when the reference count 128 * field hits 0 (= no external reference other than from SA header. 129 */ 130 131 u_int32_t key_debug_level = 0; 132 static u_int key_spi_trycnt = 1000; 133 static u_int32_t key_spi_minval = 0x100; 134 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 135 static u_int32_t policy_id = 0; 136 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 137 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 138 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 139 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 140 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 141 142 static u_int32_t acq_seq = 0; 143 static int key_tick_init_random = 0; 144 145 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 146 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 147 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 148 /* registed list */ 149 #ifndef IPSEC_NONBLOCK_ACQUIRE 150 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 151 #endif 152 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 153 154 /* search order for SAs */ 155 static u_int saorder_state_valid[] = { 156 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 157 /* 158 * This order is important because we must select the oldest SA 159 * for outbound processing. For inbound, This is not important. 160 */ 161 }; 162 static u_int saorder_state_alive[] = { 163 /* except DEAD */ 164 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 165 }; 166 static u_int saorder_state_any[] = { 167 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 168 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 169 }; 170 171 static const int minsize[] = { 172 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 173 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 174 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 175 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 176 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 177 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 178 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 179 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 180 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 181 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 182 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 183 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 184 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 185 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 186 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 187 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 188 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 189 0, /* SADB_X_EXT_KMPRIVATE */ 190 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 191 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 192 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 193 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 194 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 195 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OA */ 196 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 197 }; 198 static const int maxsize[] = { 199 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 200 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 201 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 202 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 203 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 204 0, /* SADB_EXT_ADDRESS_SRC */ 205 0, /* SADB_EXT_ADDRESS_DST */ 206 0, /* SADB_EXT_ADDRESS_PROXY */ 207 0, /* SADB_EXT_KEY_AUTH */ 208 0, /* SADB_EXT_KEY_ENCRYPT */ 209 0, /* SADB_EXT_IDENTITY_SRC */ 210 0, /* SADB_EXT_IDENTITY_DST */ 211 0, /* SADB_EXT_SENSITIVITY */ 212 0, /* SADB_EXT_PROPOSAL */ 213 0, /* SADB_EXT_SUPPORTED_AUTH */ 214 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 215 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 216 0, /* SADB_X_EXT_KMPRIVATE */ 217 0, /* SADB_X_EXT_POLICY */ 218 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 219 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 220 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 221 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 222 0, /* SADB_X_EXT_NAT_T_OA */ 223 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 224 }; 225 226 static int ipsec_esp_keymin = 256; 227 static int ipsec_esp_auth = 0; 228 static int ipsec_ah_keymin = 128; 229 230 #ifdef SYSCTL_DECL 231 SYSCTL_DECL(_net_key); 232 #endif 233 234 #ifdef SYSCTL_INT 235 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 236 &key_debug_level, 0, ""); 237 238 /* max count of trial for the decision of spi value */ 239 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 240 &key_spi_trycnt, 0, ""); 241 242 /* minimum spi value to allocate automatically. */ 243 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 244 &key_spi_minval, 0, ""); 245 246 /* maximun spi value to allocate automatically. */ 247 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 248 &key_spi_maxval, 0, ""); 249 250 /* interval to initialize randseed */ 251 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 252 &key_int_random, 0, ""); 253 254 /* lifetime for larval SA */ 255 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 256 &key_larval_lifetime, 0, ""); 257 258 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 259 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 260 &key_blockacq_count, 0, ""); 261 262 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 263 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 264 &key_blockacq_lifetime, 0, ""); 265 266 /* ESP auth */ 267 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 268 &ipsec_esp_auth, 0, ""); 269 270 /* minimum ESP key length */ 271 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 272 &ipsec_esp_keymin, 0, ""); 273 274 /* minimum AH key length */ 275 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 276 &ipsec_ah_keymin, 0, ""); 277 278 /* perfered old SA rather than new SA */ 279 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 280 &key_prefered_oldsa, 0, ""); 281 #endif /* SYSCTL_INT */ 282 283 #ifndef LIST_FOREACH 284 #define LIST_FOREACH(elm, head, field) \ 285 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field)) 286 #endif 287 #define __LIST_CHAINED(elm) \ 288 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 289 #define LIST_INSERT_TAIL(head, elm, type, field) \ 290 do {\ 291 struct type *curelm = LIST_FIRST(head); \ 292 if (curelm == NULL) {\ 293 LIST_INSERT_HEAD(head, elm, field); \ 294 } else { \ 295 while (LIST_NEXT(curelm, field)) \ 296 curelm = LIST_NEXT(curelm, field);\ 297 LIST_INSERT_AFTER(curelm, elm, field);\ 298 }\ 299 } while (0) 300 301 #define KEY_CHKSASTATE(head, sav, name) \ 302 do { \ 303 if ((head) != (sav)) { \ 304 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 305 (name), (head), (sav))); \ 306 continue; \ 307 } \ 308 } while (0) 309 310 #define KEY_CHKSPDIR(head, sp, name) \ 311 do { \ 312 if ((head) != (sp)) { \ 313 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 314 "anyway continue.\n", \ 315 (name), (head), (sp))); \ 316 } \ 317 } while (0) 318 319 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management"); 320 321 #if 1 322 #define KMALLOC(p, t, n) \ 323 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT)) 324 #define KFREE(p) \ 325 free((p), M_SECA) 326 #else 327 #define KMALLOC(p, t, n) \ 328 do { \ 329 ((p) = (t)malloc((unsigned long)(n), M_SECA, M_NOWAIT)); \ 330 printf("%s %d: %p <- KMALLOC(%s, %d)\n", \ 331 __FILE__, __LINE__, (p), #t, n); \ 332 } while (0) 333 334 #define KFREE(p) \ 335 do { \ 336 printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \ 337 free((p), M_SECA); \ 338 } while (0) 339 #endif 340 341 /* 342 * set parameters into secpolicyindex buffer. 343 * Must allocate secpolicyindex buffer passed to this function. 344 */ 345 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 346 do { \ 347 memset((idx), 0, sizeof(struct secpolicyindex)); \ 348 (idx)->dir = (_dir); \ 349 (idx)->prefs = (ps); \ 350 (idx)->prefd = (pd); \ 351 (idx)->ul_proto = (ulp); \ 352 memcpy(&(idx)->src, (s), ((const struct sockaddr *)(s))->sa_len); \ 353 memcpy(&(idx)->dst, (d), ((const struct sockaddr *)(d))->sa_len); \ 354 } while (0) 355 356 /* 357 * set parameters into secasindex buffer. 358 * Must allocate secasindex buffer before calling this function. 359 */ 360 static int 361 key_setsecasidx (int, int, int, const struct sadb_address *, 362 const struct sadb_address *, struct secasindex *); 363 364 /* key statistics */ 365 struct _keystat { 366 u_long getspi_count; /* the avarage of count to try to get new SPI */ 367 } keystat; 368 369 struct sadb_msghdr { 370 struct sadb_msg *msg; 371 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 372 int extoff[SADB_EXT_MAX + 1]; 373 int extlen[SADB_EXT_MAX + 1]; 374 }; 375 376 static struct secasvar *key_allocsa_policy (const struct secasindex *); 377 static void key_freesp_so (struct secpolicy **); 378 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int); 379 static void key_delsp (struct secpolicy *); 380 static struct secpolicy *key_getsp (struct secpolicyindex *); 381 static struct secpolicy *key_getspbyid (u_int32_t); 382 static u_int16_t key_newreqid (void); 383 static struct mbuf *key_gather_mbuf (struct mbuf *, 384 const struct sadb_msghdr *, int, int, ...); 385 static int key_spdadd (struct socket *, struct mbuf *, 386 const struct sadb_msghdr *); 387 static u_int32_t key_getnewspid (void); 388 static int key_spddelete (struct socket *, struct mbuf *, 389 const struct sadb_msghdr *); 390 static int key_spddelete2 (struct socket *, struct mbuf *, 391 const struct sadb_msghdr *); 392 static int key_spdget (struct socket *, struct mbuf *, 393 const struct sadb_msghdr *); 394 static int key_spdflush (struct socket *, struct mbuf *, 395 const struct sadb_msghdr *); 396 static int key_spddump (struct socket *, struct mbuf *, 397 const struct sadb_msghdr *); 398 static struct mbuf * key_setspddump (int *errorp, pid_t); 399 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 400 #ifdef IPSEC_NAT_T 401 static int key_nat_map (struct socket *, struct mbuf *, 402 const struct sadb_msghdr *); 403 #endif 404 static struct mbuf *key_setdumpsp (struct secpolicy *, 405 u_int8_t, u_int32_t, pid_t); 406 static u_int key_getspreqmsglen (struct secpolicy *); 407 static int key_spdexpire (struct secpolicy *); 408 static struct secashead *key_newsah (struct secasindex *); 409 static void key_delsah (struct secashead *); 410 static struct secasvar *key_newsav (struct mbuf *, 411 const struct sadb_msghdr *, struct secashead *, int *, 412 const char*, int); 413 #define KEY_NEWSAV(m, sadb, sah, e) \ 414 key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 415 static void key_delsav (struct secasvar *); 416 static struct secashead *key_getsah (struct secasindex *); 417 static struct secasvar *key_checkspidup (struct secasindex *, u_int32_t); 418 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 419 static int key_setsaval (struct secasvar *, struct mbuf *, 420 const struct sadb_msghdr *); 421 static int key_mature (struct secasvar *); 422 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 423 u_int8_t, u_int32_t, u_int32_t); 424 #ifdef IPSEC_NAT_T 425 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 426 static struct mbuf *key_setsadbxtype (u_int16_t); 427 #endif 428 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 429 static int key_checksalen (const union sockaddr_union *); 430 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 431 u_int32_t, pid_t, u_int16_t); 432 static struct mbuf *key_setsadbsa (struct secasvar *); 433 static struct mbuf *key_setsadbaddr (u_int16_t, 434 const struct sockaddr *, u_int8_t, u_int16_t); 435 #if 0 436 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 437 int, u_int64_t); 438 #endif 439 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 440 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 441 u_int32_t); 442 static void *key_newbuf (const void *, u_int); 443 #ifdef INET6 444 static int key_ismyaddr6 (struct sockaddr_in6 *); 445 #endif 446 447 /* flags for key_cmpsaidx() */ 448 #define CMP_HEAD 1 /* protocol, addresses. */ 449 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 450 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 451 #define CMP_EXACTLY 4 /* all elements. */ 452 static int key_cmpsaidx 453 (const struct secasindex *, const struct secasindex *, int); 454 455 static int key_sockaddrcmp (const struct sockaddr *, const struct sockaddr *, int); 456 static int key_bbcmp (const void *, const void *, u_int); 457 static void key_srandom (void); 458 static u_int16_t key_satype2proto (u_int8_t); 459 static u_int8_t key_proto2satype (u_int16_t); 460 461 static int key_getspi (struct socket *, struct mbuf *, 462 const struct sadb_msghdr *); 463 static u_int32_t key_do_getnewspi (struct sadb_spirange *, 464 struct secasindex *); 465 #ifdef IPSEC_NAT_T 466 static int key_handle_natt_info (struct secasvar *, 467 const struct sadb_msghdr *); 468 #endif 469 static int key_update (struct socket *, struct mbuf *, 470 const struct sadb_msghdr *); 471 #ifdef IPSEC_DOSEQCHECK 472 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 473 #endif 474 static int key_add (struct socket *, struct mbuf *, 475 const struct sadb_msghdr *); 476 static int key_setident (struct secashead *, struct mbuf *, 477 const struct sadb_msghdr *); 478 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 479 const struct sadb_msghdr *); 480 static int key_delete (struct socket *, struct mbuf *, 481 const struct sadb_msghdr *); 482 static int key_get (struct socket *, struct mbuf *, 483 const struct sadb_msghdr *); 484 485 static void key_getcomb_setlifetime (struct sadb_comb *); 486 static struct mbuf *key_getcomb_esp (void); 487 static struct mbuf *key_getcomb_ah (void); 488 static struct mbuf *key_getcomb_ipcomp (void); 489 static struct mbuf *key_getprop (const struct secasindex *); 490 491 static int key_acquire (const struct secasindex *, struct secpolicy *); 492 #ifndef IPSEC_NONBLOCK_ACQUIRE 493 static struct secacq *key_newacq (const struct secasindex *); 494 static struct secacq *key_getacq (const struct secasindex *); 495 static struct secacq *key_getacqbyseq (u_int32_t); 496 #endif 497 static struct secspacq *key_newspacq (struct secpolicyindex *); 498 static struct secspacq *key_getspacq (struct secpolicyindex *); 499 static int key_acquire2 (struct socket *, struct mbuf *, 500 const struct sadb_msghdr *); 501 static int key_register (struct socket *, struct mbuf *, 502 const struct sadb_msghdr *); 503 static int key_expire (struct secasvar *); 504 static int key_flush (struct socket *, struct mbuf *, 505 const struct sadb_msghdr *); 506 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 507 int *lenp, pid_t pid); 508 static int key_dump (struct socket *, struct mbuf *, 509 const struct sadb_msghdr *); 510 static int key_promisc (struct socket *, struct mbuf *, 511 const struct sadb_msghdr *); 512 static int key_senderror (struct socket *, struct mbuf *, int); 513 static int key_validate_ext (const struct sadb_ext *, int); 514 static int key_align (struct mbuf *, struct sadb_msghdr *); 515 #if 0 516 static const char *key_getfqdn (void); 517 static const char *key_getuserfqdn (void); 518 #endif 519 static void key_sa_chgstate (struct secasvar *, u_int8_t); 520 static inline void key_sp_dead (struct secpolicy *); 521 static void key_sp_unlink (struct secpolicy *sp); 522 523 static struct mbuf *key_alloc_mbuf (int); 524 struct callout key_timehandler_ch; 525 526 #define SA_ADDREF(p) do { \ 527 (p)->refcnt++; \ 528 IPSEC_ASSERT((p)->refcnt != 0, \ 529 ("SA refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 530 } while (0) 531 #define SA_DELREF(p) do { \ 532 IPSEC_ASSERT((p)->refcnt > 0, \ 533 ("SA refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 534 (p)->refcnt--; \ 535 } while (0) 536 537 #define SP_ADDREF(p) do { \ 538 (p)->refcnt++; \ 539 IPSEC_ASSERT((p)->refcnt != 0, \ 540 ("SP refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 541 } while (0) 542 #define SP_DELREF(p) do { \ 543 IPSEC_ASSERT((p)->refcnt > 0, \ 544 ("SP refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 545 (p)->refcnt--; \ 546 } while (0) 547 548 549 static inline void 550 key_sp_dead(struct secpolicy *sp) 551 { 552 553 /* mark the SP dead */ 554 sp->state = IPSEC_SPSTATE_DEAD; 555 } 556 557 static void 558 key_sp_unlink(struct secpolicy *sp) 559 { 560 561 /* remove from SP index */ 562 if (__LIST_CHAINED(sp)) { 563 LIST_REMOVE(sp, chain); 564 /* Release refcount held just for being on chain */ 565 KEY_FREESP(&sp); 566 } 567 } 568 569 570 /* 571 * Return 0 when there are known to be no SP's for the specified 572 * direction. Otherwise return 1. This is used by IPsec code 573 * to optimize performance. 574 */ 575 int 576 key_havesp(u_int dir) 577 { 578 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 579 LIST_FIRST(&sptree[dir]) != NULL : 1); 580 } 581 582 /* %%% IPsec policy management */ 583 /* 584 * allocating a SP for OUTBOUND or INBOUND packet. 585 * Must call key_freesp() later. 586 * OUT: NULL: not found 587 * others: found and return the pointer. 588 */ 589 struct secpolicy * 590 key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 591 { 592 struct secpolicy *sp; 593 int s; 594 595 IPSEC_ASSERT(spidx != NULL, ("key_allocsp: null spidx")); 596 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 597 ("key_allocsp: invalid direction %u", dir)); 598 599 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 600 printf("DP key_allocsp from %s:%u\n", where, tag)); 601 602 /* get a SP entry */ 603 s = splsoftnet(); /*called from softclock()*/ 604 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 605 printf("*** objects\n"); 606 kdebug_secpolicyindex(spidx)); 607 608 LIST_FOREACH(sp, &sptree[dir], chain) { 609 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 610 printf("*** in SPD\n"); 611 kdebug_secpolicyindex(&sp->spidx)); 612 613 if (sp->state == IPSEC_SPSTATE_DEAD) 614 continue; 615 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 616 goto found; 617 } 618 sp = NULL; 619 found: 620 if (sp) { 621 /* sanity check */ 622 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp"); 623 624 /* found a SPD entry */ 625 sp->lastused = time_second; 626 SP_ADDREF(sp); 627 } 628 splx(s); 629 630 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 631 printf("DP key_allocsp return SP:%p (ID=%u) refcnt %u\n", 632 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 633 return sp; 634 } 635 636 /* 637 * allocating a SP for OUTBOUND or INBOUND packet. 638 * Must call key_freesp() later. 639 * OUT: NULL: not found 640 * others: found and return the pointer. 641 */ 642 struct secpolicy * 643 key_allocsp2(u_int32_t spi, 644 union sockaddr_union *dst, 645 u_int8_t proto, 646 u_int dir, 647 const char* where, int tag) 648 { 649 struct secpolicy *sp; 650 int s; 651 652 IPSEC_ASSERT(dst != NULL, ("key_allocsp2: null dst")); 653 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 654 ("key_allocsp2: invalid direction %u", dir)); 655 656 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 657 printf("DP key_allocsp2 from %s:%u\n", where, tag)); 658 659 /* get a SP entry */ 660 s = splsoftnet(); /*called from softclock()*/ 661 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 662 printf("*** objects\n"); 663 printf("spi %u proto %u dir %u\n", spi, proto, dir); 664 kdebug_sockaddr(&dst->sa)); 665 666 LIST_FOREACH(sp, &sptree[dir], chain) { 667 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 668 printf("*** in SPD\n"); 669 kdebug_secpolicyindex(&sp->spidx)); 670 671 if (sp->state == IPSEC_SPSTATE_DEAD) 672 continue; 673 /* compare simple values, then dst address */ 674 if (sp->spidx.ul_proto != proto) 675 continue; 676 /* NB: spi's must exist and match */ 677 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 678 continue; 679 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 680 goto found; 681 } 682 sp = NULL; 683 found: 684 if (sp) { 685 /* sanity check */ 686 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2"); 687 688 /* found a SPD entry */ 689 sp->lastused = time_second; 690 SP_ADDREF(sp); 691 } 692 splx(s); 693 694 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 695 printf("DP key_allocsp2 return SP:%p (ID=%u) refcnt %u\n", 696 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 697 return sp; 698 } 699 700 /* 701 * return a policy that matches this particular inbound packet. 702 * XXX slow 703 */ 704 struct secpolicy * 705 key_gettunnel(const struct sockaddr *osrc, 706 const struct sockaddr *odst, 707 const struct sockaddr *isrc, 708 const struct sockaddr *idst, 709 const char* where, int tag) 710 { 711 struct secpolicy *sp; 712 const int dir = IPSEC_DIR_INBOUND; 713 int s; 714 struct ipsecrequest *r1, *r2, *p; 715 struct secpolicyindex spidx; 716 717 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 718 printf("DP key_gettunnel from %s:%u\n", where, tag)); 719 720 if (isrc->sa_family != idst->sa_family) { 721 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.", 722 isrc->sa_family, idst->sa_family)); 723 sp = NULL; 724 goto done; 725 } 726 727 s = splsoftnet(); /*called from softclock()*/ 728 LIST_FOREACH(sp, &sptree[dir], chain) { 729 if (sp->state == IPSEC_SPSTATE_DEAD) 730 continue; 731 732 r1 = r2 = NULL; 733 for (p = sp->req; p; p = p->next) { 734 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 735 continue; 736 737 r1 = r2; 738 r2 = p; 739 740 if (!r1) { 741 /* here we look at address matches only */ 742 spidx = sp->spidx; 743 if (isrc->sa_len > sizeof(spidx.src) || 744 idst->sa_len > sizeof(spidx.dst)) 745 continue; 746 memcpy(&spidx.src, isrc, isrc->sa_len); 747 memcpy(&spidx.dst, idst, idst->sa_len); 748 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 749 continue; 750 } else { 751 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 752 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 753 continue; 754 } 755 756 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 757 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 758 continue; 759 760 goto found; 761 } 762 } 763 sp = NULL; 764 found: 765 if (sp) { 766 sp->lastused = time_second; 767 SP_ADDREF(sp); 768 } 769 splx(s); 770 done: 771 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 772 printf("DP key_gettunnel return SP:%p (ID=%u) refcnt %u\n", 773 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 774 return sp; 775 } 776 777 /* 778 * allocating an SA entry for an *OUTBOUND* packet. 779 * checking each request entries in SP, and acquire an SA if need. 780 * OUT: 0: there are valid requests. 781 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 782 */ 783 int 784 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 785 { 786 u_int level; 787 int error; 788 789 IPSEC_ASSERT(isr != NULL, ("key_checkrequest: null isr")); 790 IPSEC_ASSERT(saidx != NULL, ("key_checkrequest: null saidx")); 791 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 792 saidx->mode == IPSEC_MODE_TUNNEL, 793 ("key_checkrequest: unexpected policy %u", saidx->mode)); 794 795 /* get current level */ 796 level = ipsec_get_reqlevel(isr); 797 798 /* 799 * XXX guard against protocol callbacks from the crypto 800 * thread as they reference ipsecrequest.sav which we 801 * temporarily null out below. Need to rethink how we 802 * handle bundled SA's in the callback thread. 803 */ 804 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 805 #if 0 806 /* 807 * We do allocate new SA only if the state of SA in the holder is 808 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 809 */ 810 if (isr->sav != NULL) { 811 if (isr->sav->sah == NULL) 812 panic("key_checkrequest: sah is null"); 813 if (isr->sav == (struct secasvar *)LIST_FIRST( 814 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 815 KEY_FREESAV(&isr->sav); 816 isr->sav = NULL; 817 } 818 } 819 #else 820 /* 821 * we free any SA stashed in the IPsec request because a different 822 * SA may be involved each time this request is checked, either 823 * because new SAs are being configured, or this request is 824 * associated with an unconnected datagram socket, or this request 825 * is associated with a system default policy. 826 * 827 * The operation may have negative impact to performance. We may 828 * want to check cached SA carefully, rather than picking new SA 829 * every time. 830 */ 831 if (isr->sav != NULL) { 832 KEY_FREESAV(&isr->sav); 833 isr->sav = NULL; 834 } 835 #endif 836 837 /* 838 * new SA allocation if no SA found. 839 * key_allocsa_policy should allocate the oldest SA available. 840 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 841 */ 842 if (isr->sav == NULL) 843 isr->sav = key_allocsa_policy(saidx); 844 845 /* When there is SA. */ 846 if (isr->sav != NULL) { 847 if (isr->sav->state != SADB_SASTATE_MATURE && 848 isr->sav->state != SADB_SASTATE_DYING) 849 return EINVAL; 850 return 0; 851 } 852 853 /* there is no SA */ 854 error = key_acquire(saidx, isr->sp); 855 if (error != 0) { 856 /* XXX What should I do ? */ 857 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " 858 "from key_acquire.\n", error)); 859 return error; 860 } 861 862 if (level != IPSEC_LEVEL_REQUIRE) { 863 /* XXX sigh, the interface to this routine is botched */ 864 IPSEC_ASSERT(isr->sav == NULL, ("key_checkrequest: unexpected SA")); 865 return 0; 866 } else { 867 return ENOENT; 868 } 869 } 870 871 /* 872 * allocating a SA for policy entry from SAD. 873 * NOTE: searching SAD of aliving state. 874 * OUT: NULL: not found. 875 * others: found and return the pointer. 876 */ 877 static struct secasvar * 878 key_allocsa_policy(const struct secasindex *saidx) 879 { 880 struct secashead *sah; 881 struct secasvar *sav; 882 u_int stateidx, state; 883 884 LIST_FOREACH(sah, &sahtree, chain) { 885 if (sah->state == SADB_SASTATE_DEAD) 886 continue; 887 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) 888 goto found; 889 } 890 891 return NULL; 892 893 found: 894 895 /* search valid state */ 896 for (stateidx = 0; 897 stateidx < _ARRAYLEN(saorder_state_valid); 898 stateidx++) { 899 900 state = saorder_state_valid[stateidx]; 901 902 sav = key_do_allocsa_policy(sah, state); 903 if (sav != NULL) 904 return sav; 905 } 906 907 return NULL; 908 } 909 910 /* 911 * searching SAD with direction, protocol, mode and state. 912 * called by key_allocsa_policy(). 913 * OUT: 914 * NULL : not found 915 * others : found, pointer to a SA. 916 */ 917 static struct secasvar * 918 key_do_allocsa_policy(struct secashead *sah, u_int state) 919 { 920 struct secasvar *sav, *nextsav, *candidate, *d; 921 922 /* initilize */ 923 candidate = NULL; 924 925 for (sav = LIST_FIRST(&sah->savtree[state]); 926 sav != NULL; 927 sav = nextsav) { 928 929 nextsav = LIST_NEXT(sav, chain); 930 931 /* sanity check */ 932 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy"); 933 934 /* initialize */ 935 if (candidate == NULL) { 936 candidate = sav; 937 continue; 938 } 939 940 /* Which SA is the better ? */ 941 942 /* sanity check 2 */ 943 if (candidate->lft_c == NULL || sav->lft_c == NULL) 944 panic("key_do_allocsa_policy: " 945 "lifetime_current is NULL"); 946 947 /* What the best method is to compare ? */ 948 if (key_prefered_oldsa) { 949 if (candidate->lft_c->sadb_lifetime_addtime > 950 sav->lft_c->sadb_lifetime_addtime) { 951 candidate = sav; 952 } 953 continue; 954 /*NOTREACHED*/ 955 } 956 957 /* prefered new sa rather than old sa */ 958 if (candidate->lft_c->sadb_lifetime_addtime < 959 sav->lft_c->sadb_lifetime_addtime) { 960 d = candidate; 961 candidate = sav; 962 } else 963 d = sav; 964 965 /* 966 * prepared to delete the SA when there is more 967 * suitable candidate and the lifetime of the SA is not 968 * permanent. 969 */ 970 if (d->lft_c->sadb_lifetime_addtime != 0) { 971 struct mbuf *m, *result; 972 973 key_sa_chgstate(d, SADB_SASTATE_DEAD); 974 975 IPSEC_ASSERT(d->refcnt > 0, 976 ("key_do_allocsa_policy: bogus ref count")); 977 m = key_setsadbmsg(SADB_DELETE, 0, 978 d->sah->saidx.proto, 0, 0, d->refcnt - 1); 979 if (!m) 980 goto msgfail; 981 result = m; 982 983 /* set sadb_address for saidx's. */ 984 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 985 &d->sah->saidx.src.sa, 986 d->sah->saidx.src.sa.sa_len << 3, 987 IPSEC_ULPROTO_ANY); 988 if (!m) 989 goto msgfail; 990 m_cat(result, m); 991 992 /* set sadb_address for saidx's. */ 993 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 994 &d->sah->saidx.src.sa, 995 d->sah->saidx.src.sa.sa_len << 3, 996 IPSEC_ULPROTO_ANY); 997 if (!m) 998 goto msgfail; 999 m_cat(result, m); 1000 1001 /* create SA extension */ 1002 m = key_setsadbsa(d); 1003 if (!m) 1004 goto msgfail; 1005 m_cat(result, m); 1006 1007 if (result->m_len < sizeof(struct sadb_msg)) { 1008 result = m_pullup(result, 1009 sizeof(struct sadb_msg)); 1010 if (result == NULL) 1011 goto msgfail; 1012 } 1013 1014 result->m_pkthdr.len = 0; 1015 for (m = result; m; m = m->m_next) 1016 result->m_pkthdr.len += m->m_len; 1017 mtod(result, struct sadb_msg *)->sadb_msg_len = 1018 PFKEY_UNIT64(result->m_pkthdr.len); 1019 1020 if (key_sendup_mbuf(NULL, result, 1021 KEY_SENDUP_REGISTERED)) 1022 goto msgfail; 1023 msgfail: 1024 KEY_FREESAV(&d); 1025 } 1026 } 1027 1028 if (candidate) { 1029 SA_ADDREF(candidate); 1030 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1031 printf("DP allocsa_policy cause " 1032 "refcnt++:%d SA:%p\n", 1033 candidate->refcnt, candidate)); 1034 } 1035 return candidate; 1036 } 1037 1038 /* 1039 * allocating a usable SA entry for a *INBOUND* packet. 1040 * Must call key_freesav() later. 1041 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1042 * NULL: not found, or error occurred. 1043 * 1044 * In the comparison, no source address is used--for RFC2401 conformance. 1045 * To quote, from section 4.1: 1046 * A security association is uniquely identified by a triple consisting 1047 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1048 * security protocol (AH or ESP) identifier. 1049 * Note that, however, we do need to keep source address in IPsec SA. 1050 * IKE specification and PF_KEY specification do assume that we 1051 * keep source address in IPsec SA. We see a tricky situation here. 1052 * 1053 * sport and dport are used for NAT-T. network order is always used. 1054 */ 1055 struct secasvar * 1056 key_allocsa( 1057 const union sockaddr_union *dst, 1058 u_int proto, 1059 u_int32_t spi, 1060 u_int16_t sport, 1061 u_int16_t dport, 1062 const char* where, int tag) 1063 { 1064 struct secashead *sah; 1065 struct secasvar *sav; 1066 u_int stateidx, state; 1067 int s; 1068 int chkport = 0; 1069 1070 int must_check_spi = 1; 1071 int must_check_alg = 0; 1072 u_int16_t cpi = 0; 1073 u_int8_t algo = 0; 1074 1075 #ifdef IPSEC_NAT_T 1076 if ((sport != 0) && (dport != 0)) 1077 chkport = 1; 1078 #endif 1079 1080 IPSEC_ASSERT(dst != NULL, ("key_allocsa: null dst address")); 1081 1082 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1083 printf("DP key_allocsa from %s:%u\n", where, tag)); 1084 1085 /* 1086 * XXX IPCOMP case 1087 * We use cpi to define spi here. In the case where cpi <= 1088 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1089 * the real spi. In this case, don't check the spi but check the 1090 * algorithm 1091 */ 1092 1093 if (proto == IPPROTO_IPCOMP) { 1094 u_int32_t tmp; 1095 tmp = ntohl(spi); 1096 cpi = (u_int16_t) tmp; 1097 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1098 algo = (u_int8_t) cpi; 1099 must_check_spi = 0; 1100 must_check_alg = 1; 1101 } 1102 } 1103 1104 /* 1105 * searching SAD. 1106 * XXX: to be checked internal IP header somewhere. Also when 1107 * IPsec tunnel packet is received. But ESP tunnel mode is 1108 * encrypted so we can't check internal IP header. 1109 */ 1110 s = splsoftnet(); /*called from softclock()*/ 1111 LIST_FOREACH(sah, &sahtree, chain) { 1112 /* search valid state */ 1113 for (stateidx = 0; 1114 stateidx < _ARRAYLEN(saorder_state_valid); 1115 stateidx++) { 1116 state = saorder_state_valid[stateidx]; 1117 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1118 /* sanity check */ 1119 KEY_CHKSASTATE(sav->state, state, "key_allocsav"); 1120 /* do not return entries w/ unusable state */ 1121 if (sav->state != SADB_SASTATE_MATURE && 1122 sav->state != SADB_SASTATE_DYING) 1123 continue; 1124 if (proto != sav->sah->saidx.proto) 1125 continue; 1126 if (must_check_spi && spi != sav->spi) 1127 continue; 1128 /* XXX only on the ipcomp case */ 1129 if (must_check_alg && algo != sav->alg_comp) 1130 continue; 1131 1132 #if 0 /* don't check src */ 1133 /* Fix port in src->sa */ 1134 1135 /* check src address */ 1136 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0) 1137 continue; 1138 #endif 1139 /* fix port of dst address XXX*/ 1140 key_porttosaddr(__UNCONST(dst), dport); 1141 /* check dst address */ 1142 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1143 continue; 1144 SA_ADDREF(sav); 1145 goto done; 1146 } 1147 } 1148 } 1149 sav = NULL; 1150 done: 1151 splx(s); 1152 1153 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1154 printf("DP key_allocsa return SA:%p; refcnt %u\n", 1155 sav, sav ? sav->refcnt : 0)); 1156 return sav; 1157 } 1158 1159 /* 1160 * Must be called after calling key_allocsp(). 1161 * For both the packet without socket and key_freeso(). 1162 */ 1163 void 1164 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1165 { 1166 struct secpolicy *sp = *spp; 1167 1168 IPSEC_ASSERT(sp != NULL, ("key_freesp: null sp")); 1169 1170 SP_DELREF(sp); 1171 1172 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1173 printf("DP key_freesp SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1174 sp, sp->id, where, tag, sp->refcnt)); 1175 1176 if (sp->refcnt == 0) { 1177 *spp = NULL; 1178 key_delsp(sp); 1179 } 1180 } 1181 1182 /* 1183 * Must be called after calling key_allocsp(). 1184 * For the packet with socket. 1185 */ 1186 void 1187 key_freeso(struct socket *so) 1188 { 1189 /* sanity check */ 1190 IPSEC_ASSERT(so != NULL, ("key_freeso: null so")); 1191 1192 switch (so->so_proto->pr_domain->dom_family) { 1193 #ifdef INET 1194 case PF_INET: 1195 { 1196 struct inpcb *pcb = sotoinpcb(so); 1197 1198 /* Does it have a PCB ? */ 1199 if (pcb == NULL) 1200 return; 1201 key_freesp_so(&pcb->inp_sp->sp_in); 1202 key_freesp_so(&pcb->inp_sp->sp_out); 1203 } 1204 break; 1205 #endif 1206 #ifdef INET6 1207 case PF_INET6: 1208 { 1209 #ifdef HAVE_NRL_INPCB 1210 struct inpcb *pcb = sotoinpcb(so); 1211 1212 /* Does it have a PCB ? */ 1213 if (pcb == NULL) 1214 return; 1215 key_freesp_so(&pcb->inp_sp->sp_in); 1216 key_freesp_so(&pcb->inp_sp->sp_out); 1217 #else 1218 struct in6pcb *pcb = sotoin6pcb(so); 1219 1220 /* Does it have a PCB ? */ 1221 if (pcb == NULL) 1222 return; 1223 key_freesp_so(&pcb->in6p_sp->sp_in); 1224 key_freesp_so(&pcb->in6p_sp->sp_out); 1225 #endif 1226 } 1227 break; 1228 #endif /* INET6 */ 1229 default: 1230 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1231 so->so_proto->pr_domain->dom_family)); 1232 return; 1233 } 1234 } 1235 1236 static void 1237 key_freesp_so(struct secpolicy **sp) 1238 { 1239 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp")); 1240 1241 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1242 (*sp)->policy == IPSEC_POLICY_BYPASS) 1243 return; 1244 1245 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1246 ("key_freesp_so: invalid policy %u", (*sp)->policy)); 1247 KEY_FREESP(sp); 1248 } 1249 1250 /* 1251 * Must be called after calling key_allocsa(). 1252 * This function is called by key_freesp() to free some SA allocated 1253 * for a policy. 1254 */ 1255 void 1256 key_freesav(struct secasvar **psav, const char* where, int tag) 1257 { 1258 struct secasvar *sav = *psav; 1259 1260 IPSEC_ASSERT(sav != NULL, ("key_freesav: null sav")); 1261 1262 SA_DELREF(sav); 1263 1264 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1265 printf("DP key_freesav SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1266 sav, (u_long)ntohl(sav->spi), 1267 where, tag, sav->refcnt)); 1268 1269 if (sav->refcnt == 0) { 1270 *psav = NULL; 1271 key_delsav(sav); 1272 } 1273 } 1274 1275 /* %%% SPD management */ 1276 /* 1277 * free security policy entry. 1278 */ 1279 static void 1280 key_delsp(struct secpolicy *sp) 1281 { 1282 int s; 1283 1284 IPSEC_ASSERT(sp != NULL, ("key_delsp: null sp")); 1285 1286 key_sp_dead(sp); 1287 1288 IPSEC_ASSERT(sp->refcnt == 0, 1289 ("key_delsp: SP with references deleted (refcnt %u)", 1290 sp->refcnt)); 1291 1292 s = splsoftnet(); /*called from softclock()*/ 1293 1294 { 1295 struct ipsecrequest *isr = sp->req, *nextisr; 1296 1297 while (isr != NULL) { 1298 if (isr->sav != NULL) { 1299 KEY_FREESAV(&isr->sav); 1300 isr->sav = NULL; 1301 } 1302 1303 nextisr = isr->next; 1304 KFREE(isr); 1305 isr = nextisr; 1306 } 1307 } 1308 1309 KFREE(sp); 1310 1311 splx(s); 1312 } 1313 1314 /* 1315 * search SPD 1316 * OUT: NULL : not found 1317 * others : found, pointer to a SP. 1318 */ 1319 static struct secpolicy * 1320 key_getsp(struct secpolicyindex *spidx) 1321 { 1322 struct secpolicy *sp; 1323 1324 IPSEC_ASSERT(spidx != NULL, ("key_getsp: null spidx")); 1325 1326 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1327 if (sp->state == IPSEC_SPSTATE_DEAD) 1328 continue; 1329 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1330 SP_ADDREF(sp); 1331 return sp; 1332 } 1333 } 1334 1335 return NULL; 1336 } 1337 1338 /* 1339 * get SP by index. 1340 * OUT: NULL : not found 1341 * others : found, pointer to a SP. 1342 */ 1343 static struct secpolicy * 1344 key_getspbyid(u_int32_t id) 1345 { 1346 struct secpolicy *sp; 1347 1348 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1349 if (sp->state == IPSEC_SPSTATE_DEAD) 1350 continue; 1351 if (sp->id == id) { 1352 SP_ADDREF(sp); 1353 return sp; 1354 } 1355 } 1356 1357 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1358 if (sp->state == IPSEC_SPSTATE_DEAD) 1359 continue; 1360 if (sp->id == id) { 1361 SP_ADDREF(sp); 1362 return sp; 1363 } 1364 } 1365 1366 return NULL; 1367 } 1368 1369 struct secpolicy * 1370 key_newsp(const char* where, int tag) 1371 { 1372 struct secpolicy *newsp = NULL; 1373 1374 newsp = (struct secpolicy *) 1375 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); 1376 if (newsp) { 1377 newsp->refcnt = 1; 1378 newsp->req = NULL; 1379 } 1380 1381 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1382 printf("DP key_newsp from %s:%u return SP:%p\n", 1383 where, tag, newsp)); 1384 return newsp; 1385 } 1386 1387 /* 1388 * create secpolicy structure from sadb_x_policy structure. 1389 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1390 * so must be set properly later. 1391 */ 1392 struct secpolicy * 1393 key_msg2sp(struct sadb_x_policy *xpl0, size_t len, int *error) 1394 { 1395 struct secpolicy *newsp; 1396 1397 /* sanity check */ 1398 if (xpl0 == NULL) 1399 panic("key_msg2sp: NULL pointer was passed"); 1400 if (len < sizeof(*xpl0)) 1401 panic("key_msg2sp: invalid length"); 1402 if (len != PFKEY_EXTLEN(xpl0)) { 1403 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1404 *error = EINVAL; 1405 return NULL; 1406 } 1407 1408 if ((newsp = KEY_NEWSP()) == NULL) { 1409 *error = ENOBUFS; 1410 return NULL; 1411 } 1412 1413 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1414 newsp->policy = xpl0->sadb_x_policy_type; 1415 1416 /* check policy */ 1417 switch (xpl0->sadb_x_policy_type) { 1418 case IPSEC_POLICY_DISCARD: 1419 case IPSEC_POLICY_NONE: 1420 case IPSEC_POLICY_ENTRUST: 1421 case IPSEC_POLICY_BYPASS: 1422 newsp->req = NULL; 1423 break; 1424 1425 case IPSEC_POLICY_IPSEC: 1426 { 1427 int tlen; 1428 struct sadb_x_ipsecrequest *xisr; 1429 struct ipsecrequest **p_isr = &newsp->req; 1430 1431 /* validity check */ 1432 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1433 ipseclog((LOG_DEBUG, 1434 "key_msg2sp: Invalid msg length.\n")); 1435 KEY_FREESP(&newsp); 1436 *error = EINVAL; 1437 return NULL; 1438 } 1439 1440 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1441 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1); 1442 1443 while (tlen > 0) { 1444 /* length check */ 1445 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1446 ipseclog((LOG_DEBUG, "key_msg2sp: " 1447 "invalid ipsecrequest length.\n")); 1448 KEY_FREESP(&newsp); 1449 *error = EINVAL; 1450 return NULL; 1451 } 1452 1453 /* allocate request buffer */ 1454 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); 1455 if ((*p_isr) == NULL) { 1456 ipseclog((LOG_DEBUG, 1457 "key_msg2sp: No more memory.\n")); 1458 KEY_FREESP(&newsp); 1459 *error = ENOBUFS; 1460 return NULL; 1461 } 1462 memset(*p_isr, 0, sizeof(**p_isr)); 1463 1464 /* set values */ 1465 (*p_isr)->next = NULL; 1466 1467 switch (xisr->sadb_x_ipsecrequest_proto) { 1468 case IPPROTO_ESP: 1469 case IPPROTO_AH: 1470 case IPPROTO_IPCOMP: 1471 break; 1472 default: 1473 ipseclog((LOG_DEBUG, 1474 "key_msg2sp: invalid proto type=%u\n", 1475 xisr->sadb_x_ipsecrequest_proto)); 1476 KEY_FREESP(&newsp); 1477 *error = EPROTONOSUPPORT; 1478 return NULL; 1479 } 1480 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1481 1482 switch (xisr->sadb_x_ipsecrequest_mode) { 1483 case IPSEC_MODE_TRANSPORT: 1484 case IPSEC_MODE_TUNNEL: 1485 break; 1486 case IPSEC_MODE_ANY: 1487 default: 1488 ipseclog((LOG_DEBUG, 1489 "key_msg2sp: invalid mode=%u\n", 1490 xisr->sadb_x_ipsecrequest_mode)); 1491 KEY_FREESP(&newsp); 1492 *error = EINVAL; 1493 return NULL; 1494 } 1495 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1496 1497 switch (xisr->sadb_x_ipsecrequest_level) { 1498 case IPSEC_LEVEL_DEFAULT: 1499 case IPSEC_LEVEL_USE: 1500 case IPSEC_LEVEL_REQUIRE: 1501 break; 1502 case IPSEC_LEVEL_UNIQUE: 1503 /* validity check */ 1504 /* 1505 * If range violation of reqid, kernel will 1506 * update it, don't refuse it. 1507 */ 1508 if (xisr->sadb_x_ipsecrequest_reqid 1509 > IPSEC_MANUAL_REQID_MAX) { 1510 ipseclog((LOG_DEBUG, 1511 "key_msg2sp: reqid=%d range " 1512 "violation, updated by kernel.\n", 1513 xisr->sadb_x_ipsecrequest_reqid)); 1514 xisr->sadb_x_ipsecrequest_reqid = 0; 1515 } 1516 1517 /* allocate new reqid id if reqid is zero. */ 1518 if (xisr->sadb_x_ipsecrequest_reqid == 0) { 1519 u_int16_t reqid; 1520 if ((reqid = key_newreqid()) == 0) { 1521 KEY_FREESP(&newsp); 1522 *error = ENOBUFS; 1523 return NULL; 1524 } 1525 (*p_isr)->saidx.reqid = reqid; 1526 xisr->sadb_x_ipsecrequest_reqid = reqid; 1527 } else { 1528 /* set it for manual keying. */ 1529 (*p_isr)->saidx.reqid = 1530 xisr->sadb_x_ipsecrequest_reqid; 1531 } 1532 break; 1533 1534 default: 1535 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1536 xisr->sadb_x_ipsecrequest_level)); 1537 KEY_FREESP(&newsp); 1538 *error = EINVAL; 1539 return NULL; 1540 } 1541 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1542 1543 /* set IP addresses if there */ 1544 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1545 struct sockaddr *paddr; 1546 1547 paddr = (struct sockaddr *)(xisr + 1); 1548 1549 /* validity check */ 1550 if (paddr->sa_len 1551 > sizeof((*p_isr)->saidx.src)) { 1552 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1553 "address length.\n")); 1554 KEY_FREESP(&newsp); 1555 *error = EINVAL; 1556 return NULL; 1557 } 1558 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1559 1560 paddr = (struct sockaddr *)((char *)paddr 1561 + paddr->sa_len); 1562 1563 /* validity check */ 1564 if (paddr->sa_len 1565 > sizeof((*p_isr)->saidx.dst)) { 1566 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1567 "address length.\n")); 1568 KEY_FREESP(&newsp); 1569 *error = EINVAL; 1570 return NULL; 1571 } 1572 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1573 } 1574 1575 (*p_isr)->sav = NULL; 1576 (*p_isr)->sp = newsp; 1577 1578 /* initialization for the next. */ 1579 p_isr = &(*p_isr)->next; 1580 tlen -= xisr->sadb_x_ipsecrequest_len; 1581 1582 /* validity check */ 1583 if (tlen < 0) { 1584 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1585 KEY_FREESP(&newsp); 1586 *error = EINVAL; 1587 return NULL; 1588 } 1589 1590 xisr = (struct sadb_x_ipsecrequest *)((char *)xisr 1591 + xisr->sadb_x_ipsecrequest_len); 1592 } 1593 } 1594 break; 1595 default: 1596 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1597 KEY_FREESP(&newsp); 1598 *error = EINVAL; 1599 return NULL; 1600 } 1601 1602 *error = 0; 1603 return newsp; 1604 } 1605 1606 static u_int16_t 1607 key_newreqid() 1608 { 1609 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1610 1611 auto_reqid = (auto_reqid == 0xffff 1612 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1613 1614 /* XXX should be unique check */ 1615 1616 return auto_reqid; 1617 } 1618 1619 /* 1620 * copy secpolicy struct to sadb_x_policy structure indicated. 1621 */ 1622 struct mbuf * 1623 key_sp2msg(struct secpolicy *sp) 1624 { 1625 struct sadb_x_policy *xpl; 1626 int tlen; 1627 char *p; 1628 struct mbuf *m; 1629 1630 /* sanity check. */ 1631 if (sp == NULL) 1632 panic("key_sp2msg: NULL pointer was passed"); 1633 1634 tlen = key_getspreqmsglen(sp); 1635 1636 m = key_alloc_mbuf(tlen); 1637 if (!m || m->m_next) { /*XXX*/ 1638 if (m) 1639 m_freem(m); 1640 return NULL; 1641 } 1642 1643 m->m_len = tlen; 1644 m->m_next = NULL; 1645 xpl = mtod(m, struct sadb_x_policy *); 1646 memset(xpl, 0, tlen); 1647 1648 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1649 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1650 xpl->sadb_x_policy_type = sp->policy; 1651 xpl->sadb_x_policy_dir = sp->spidx.dir; 1652 xpl->sadb_x_policy_id = sp->id; 1653 p = (char *)xpl + sizeof(*xpl); 1654 1655 /* if is the policy for ipsec ? */ 1656 if (sp->policy == IPSEC_POLICY_IPSEC) { 1657 struct sadb_x_ipsecrequest *xisr; 1658 struct ipsecrequest *isr; 1659 1660 for (isr = sp->req; isr != NULL; isr = isr->next) { 1661 1662 xisr = (struct sadb_x_ipsecrequest *)p; 1663 1664 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1665 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1666 xisr->sadb_x_ipsecrequest_level = isr->level; 1667 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1668 1669 p += sizeof(*xisr); 1670 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1671 p += isr->saidx.src.sa.sa_len; 1672 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1673 p += isr->saidx.src.sa.sa_len; 1674 1675 xisr->sadb_x_ipsecrequest_len = 1676 PFKEY_ALIGN8(sizeof(*xisr) 1677 + isr->saidx.src.sa.sa_len 1678 + isr->saidx.dst.sa.sa_len); 1679 } 1680 } 1681 1682 return m; 1683 } 1684 1685 /* m will not be freed nor modified */ 1686 static struct mbuf * 1687 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1688 int ndeep, int nitem, ...) 1689 { 1690 va_list ap; 1691 int idx; 1692 int i; 1693 struct mbuf *result = NULL, *n; 1694 int len; 1695 1696 if (m == NULL || mhp == NULL) 1697 panic("null pointer passed to key_gather"); 1698 1699 va_start(ap, nitem); 1700 for (i = 0; i < nitem; i++) { 1701 idx = va_arg(ap, int); 1702 if (idx < 0 || idx > SADB_EXT_MAX) 1703 goto fail; 1704 /* don't attempt to pull empty extension */ 1705 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1706 continue; 1707 if (idx != SADB_EXT_RESERVED && 1708 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1709 continue; 1710 1711 if (idx == SADB_EXT_RESERVED) { 1712 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1713 #ifdef DIAGNOSTIC 1714 if (len > MHLEN) 1715 panic("assumption failed"); 1716 #endif 1717 MGETHDR(n, M_DONTWAIT, MT_DATA); 1718 if (!n) 1719 goto fail; 1720 n->m_len = len; 1721 n->m_next = NULL; 1722 m_copydata(m, 0, sizeof(struct sadb_msg), 1723 mtod(n, void *)); 1724 } else if (i < ndeep) { 1725 len = mhp->extlen[idx]; 1726 n = key_alloc_mbuf(len); 1727 if (!n || n->m_next) { /*XXX*/ 1728 if (n) 1729 m_freem(n); 1730 goto fail; 1731 } 1732 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1733 mtod(n, void *)); 1734 } else { 1735 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1736 M_DONTWAIT); 1737 } 1738 if (n == NULL) 1739 goto fail; 1740 1741 if (result) 1742 m_cat(result, n); 1743 else 1744 result = n; 1745 } 1746 va_end(ap); 1747 1748 if ((result->m_flags & M_PKTHDR) != 0) { 1749 result->m_pkthdr.len = 0; 1750 for (n = result; n; n = n->m_next) 1751 result->m_pkthdr.len += n->m_len; 1752 } 1753 1754 return result; 1755 1756 fail: 1757 va_end(ap); 1758 m_freem(result); 1759 return NULL; 1760 } 1761 1762 /* 1763 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1764 * add an entry to SP database, when received 1765 * <base, address(SD), (lifetime(H),) policy> 1766 * from the user(?). 1767 * Adding to SP database, 1768 * and send 1769 * <base, address(SD), (lifetime(H),) policy> 1770 * to the socket which was send. 1771 * 1772 * SPDADD set a unique policy entry. 1773 * SPDSETIDX like SPDADD without a part of policy requests. 1774 * SPDUPDATE replace a unique policy entry. 1775 * 1776 * m will always be freed. 1777 */ 1778 static int 1779 key_spdadd(struct socket *so, struct mbuf *m, 1780 const struct sadb_msghdr *mhp) 1781 { 1782 struct sadb_address *src0, *dst0; 1783 struct sadb_x_policy *xpl0, *xpl; 1784 struct sadb_lifetime *lft = NULL; 1785 struct secpolicyindex spidx; 1786 struct secpolicy *newsp; 1787 int error; 1788 1789 /* sanity check */ 1790 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 1791 panic("key_spdadd: NULL pointer is passed"); 1792 1793 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1794 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1795 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1796 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1797 return key_senderror(so, m, EINVAL); 1798 } 1799 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1800 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1801 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1802 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1803 return key_senderror(so, m, EINVAL); 1804 } 1805 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1806 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1807 < sizeof(struct sadb_lifetime)) { 1808 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1809 return key_senderror(so, m, EINVAL); 1810 } 1811 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1812 } 1813 1814 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1815 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1816 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1817 1818 /* make secindex */ 1819 /* XXX boundary check against sa_len */ 1820 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1821 src0 + 1, 1822 dst0 + 1, 1823 src0->sadb_address_prefixlen, 1824 dst0->sadb_address_prefixlen, 1825 src0->sadb_address_proto, 1826 &spidx); 1827 1828 /* checking the direciton. */ 1829 switch (xpl0->sadb_x_policy_dir) { 1830 case IPSEC_DIR_INBOUND: 1831 case IPSEC_DIR_OUTBOUND: 1832 break; 1833 default: 1834 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1835 mhp->msg->sadb_msg_errno = EINVAL; 1836 return 0; 1837 } 1838 1839 /* check policy */ 1840 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1841 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1842 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1843 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1844 return key_senderror(so, m, EINVAL); 1845 } 1846 1847 /* policy requests are mandatory when action is ipsec. */ 1848 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1849 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1850 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1851 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1852 return key_senderror(so, m, EINVAL); 1853 } 1854 1855 /* 1856 * checking there is SP already or not. 1857 * SPDUPDATE doesn't depend on whether there is a SP or not. 1858 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1859 * then error. 1860 */ 1861 newsp = key_getsp(&spidx); 1862 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1863 if (newsp) { 1864 key_sp_dead(newsp); 1865 key_sp_unlink(newsp); /* XXX jrs ordering */ 1866 KEY_FREESP(&newsp); 1867 newsp = NULL; 1868 } 1869 } else { 1870 if (newsp != NULL) { 1871 KEY_FREESP(&newsp); 1872 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1873 return key_senderror(so, m, EEXIST); 1874 } 1875 } 1876 1877 /* allocation new SP entry */ 1878 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1879 return key_senderror(so, m, error); 1880 } 1881 1882 if ((newsp->id = key_getnewspid()) == 0) { 1883 KFREE(newsp); 1884 return key_senderror(so, m, ENOBUFS); 1885 } 1886 1887 /* XXX boundary check against sa_len */ 1888 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1889 src0 + 1, 1890 dst0 + 1, 1891 src0->sadb_address_prefixlen, 1892 dst0->sadb_address_prefixlen, 1893 src0->sadb_address_proto, 1894 &newsp->spidx); 1895 1896 /* sanity check on addr pair */ 1897 if (((struct sockaddr *)(src0 + 1))->sa_family != 1898 ((struct sockaddr *)(dst0+ 1))->sa_family) { 1899 KFREE(newsp); 1900 return key_senderror(so, m, EINVAL); 1901 } 1902 if (((struct sockaddr *)(src0 + 1))->sa_len != 1903 ((struct sockaddr *)(dst0+ 1))->sa_len) { 1904 KFREE(newsp); 1905 return key_senderror(so, m, EINVAL); 1906 } 1907 #if 1 1908 if (newsp->req && newsp->req->saidx.src.sa.sa_family) { 1909 struct sockaddr *sa; 1910 sa = (struct sockaddr *)(src0 + 1); 1911 if (sa->sa_family != newsp->req->saidx.src.sa.sa_family) { 1912 KFREE(newsp); 1913 return key_senderror(so, m, EINVAL); 1914 } 1915 } 1916 if (newsp->req && newsp->req->saidx.dst.sa.sa_family) { 1917 struct sockaddr *sa; 1918 sa = (struct sockaddr *)(dst0 + 1); 1919 if (sa->sa_family != newsp->req->saidx.dst.sa.sa_family) { 1920 KFREE(newsp); 1921 return key_senderror(so, m, EINVAL); 1922 } 1923 } 1924 #endif 1925 1926 newsp->created = time_second; 1927 newsp->lastused = newsp->created; 1928 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1929 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1930 1931 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1932 newsp->state = IPSEC_SPSTATE_ALIVE; 1933 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1934 1935 /* delete the entry in spacqtree */ 1936 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1937 struct secspacq *spacq; 1938 if ((spacq = key_getspacq(&spidx)) != NULL) { 1939 /* reset counter in order to deletion by timehandler. */ 1940 spacq->created = time_second; 1941 spacq->count = 0; 1942 } 1943 } 1944 1945 #if defined(__NetBSD__) 1946 /* Invalidate all cached SPD pointers in the PCBs. */ 1947 ipsec_invalpcbcacheall(); 1948 1949 #if defined(GATEWAY) 1950 /* Invalidate the ipflow cache, as well. */ 1951 ipflow_invalidate_all(0); 1952 #ifdef INET6 1953 ip6flow_invalidate_all(0); 1954 #endif /* INET6 */ 1955 #endif /* GATEWAY */ 1956 #endif /* __NetBSD__ */ 1957 1958 { 1959 struct mbuf *n, *mpolicy; 1960 struct sadb_msg *newmsg; 1961 int off; 1962 1963 /* create new sadb_msg to reply. */ 1964 if (lft) { 1965 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1966 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1967 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1968 } else { 1969 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1970 SADB_X_EXT_POLICY, 1971 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1972 } 1973 if (!n) 1974 return key_senderror(so, m, ENOBUFS); 1975 1976 if (n->m_len < sizeof(*newmsg)) { 1977 n = m_pullup(n, sizeof(*newmsg)); 1978 if (!n) 1979 return key_senderror(so, m, ENOBUFS); 1980 } 1981 newmsg = mtod(n, struct sadb_msg *); 1982 newmsg->sadb_msg_errno = 0; 1983 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1984 1985 off = 0; 1986 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1987 sizeof(*xpl), &off); 1988 if (mpolicy == NULL) { 1989 /* n is already freed */ 1990 return key_senderror(so, m, ENOBUFS); 1991 } 1992 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 1993 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 1994 m_freem(n); 1995 return key_senderror(so, m, EINVAL); 1996 } 1997 xpl->sadb_x_policy_id = newsp->id; 1998 1999 m_freem(m); 2000 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2001 } 2002 } 2003 2004 /* 2005 * get new policy id. 2006 * OUT: 2007 * 0: failure. 2008 * others: success. 2009 */ 2010 static u_int32_t 2011 key_getnewspid() 2012 { 2013 u_int32_t newid = 0; 2014 int count = key_spi_trycnt; /* XXX */ 2015 struct secpolicy *sp; 2016 2017 /* when requesting to allocate spi ranged */ 2018 while (count--) { 2019 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2020 2021 if ((sp = key_getspbyid(newid)) == NULL) 2022 break; 2023 2024 KEY_FREESP(&sp); 2025 } 2026 2027 if (count == 0 || newid == 0) { 2028 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2029 return 0; 2030 } 2031 2032 return newid; 2033 } 2034 2035 /* 2036 * SADB_SPDDELETE processing 2037 * receive 2038 * <base, address(SD), policy(*)> 2039 * from the user(?), and set SADB_SASTATE_DEAD, 2040 * and send, 2041 * <base, address(SD), policy(*)> 2042 * to the ikmpd. 2043 * policy(*) including direction of policy. 2044 * 2045 * m will always be freed. 2046 */ 2047 static int 2048 key_spddelete(struct socket *so, struct mbuf *m, 2049 const struct sadb_msghdr *mhp) 2050 { 2051 struct sadb_address *src0, *dst0; 2052 struct sadb_x_policy *xpl0; 2053 struct secpolicyindex spidx; 2054 struct secpolicy *sp; 2055 2056 /* sanity check */ 2057 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2058 panic("key_spddelete: NULL pointer is passed"); 2059 2060 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2061 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2062 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2063 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2064 return key_senderror(so, m, EINVAL); 2065 } 2066 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2067 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2068 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2069 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2070 return key_senderror(so, m, EINVAL); 2071 } 2072 2073 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2074 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2075 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2076 2077 /* make secindex */ 2078 /* XXX boundary check against sa_len */ 2079 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2080 src0 + 1, 2081 dst0 + 1, 2082 src0->sadb_address_prefixlen, 2083 dst0->sadb_address_prefixlen, 2084 src0->sadb_address_proto, 2085 &spidx); 2086 2087 /* checking the direciton. */ 2088 switch (xpl0->sadb_x_policy_dir) { 2089 case IPSEC_DIR_INBOUND: 2090 case IPSEC_DIR_OUTBOUND: 2091 break; 2092 default: 2093 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2094 return key_senderror(so, m, EINVAL); 2095 } 2096 2097 /* Is there SP in SPD ? */ 2098 if ((sp = key_getsp(&spidx)) == NULL) { 2099 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2100 return key_senderror(so, m, EINVAL); 2101 } 2102 2103 /* save policy id to buffer to be returned. */ 2104 xpl0->sadb_x_policy_id = sp->id; 2105 2106 key_sp_dead(sp); 2107 key_sp_unlink(sp); /* XXX jrs ordering */ 2108 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2109 2110 #if defined(__NetBSD__) 2111 /* Invalidate all cached SPD pointers in the PCBs. */ 2112 ipsec_invalpcbcacheall(); 2113 2114 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2115 #endif /* __NetBSD__ */ 2116 2117 { 2118 struct mbuf *n; 2119 struct sadb_msg *newmsg; 2120 2121 /* create new sadb_msg to reply. */ 2122 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2123 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2124 if (!n) 2125 return key_senderror(so, m, ENOBUFS); 2126 2127 newmsg = mtod(n, struct sadb_msg *); 2128 newmsg->sadb_msg_errno = 0; 2129 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2130 2131 m_freem(m); 2132 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2133 } 2134 } 2135 2136 /* 2137 * SADB_SPDDELETE2 processing 2138 * receive 2139 * <base, policy(*)> 2140 * from the user(?), and set SADB_SASTATE_DEAD, 2141 * and send, 2142 * <base, policy(*)> 2143 * to the ikmpd. 2144 * policy(*) including direction of policy. 2145 * 2146 * m will always be freed. 2147 */ 2148 static int 2149 key_spddelete2(struct socket *so, struct mbuf *m, 2150 const struct sadb_msghdr *mhp) 2151 { 2152 u_int32_t id; 2153 struct secpolicy *sp; 2154 2155 /* sanity check */ 2156 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2157 panic("key_spddelete2: NULL pointer is passed"); 2158 2159 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2160 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2161 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2162 key_senderror(so, m, EINVAL); 2163 return 0; 2164 } 2165 2166 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2167 2168 /* Is there SP in SPD ? */ 2169 if ((sp = key_getspbyid(id)) == NULL) { 2170 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2171 return key_senderror(so, m, EINVAL); 2172 } 2173 2174 key_sp_dead(sp); 2175 key_sp_unlink(sp); /* XXX jrs ordering */ 2176 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2177 sp = NULL; 2178 2179 #if defined(__NetBSD__) 2180 /* Invalidate all cached SPD pointers in the PCBs. */ 2181 ipsec_invalpcbcacheall(); 2182 2183 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2184 #endif /* __NetBSD__ */ 2185 2186 { 2187 struct mbuf *n, *nn; 2188 struct sadb_msg *newmsg; 2189 int off, len; 2190 2191 /* create new sadb_msg to reply. */ 2192 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2193 2194 if (len > MCLBYTES) 2195 return key_senderror(so, m, ENOBUFS); 2196 MGETHDR(n, M_DONTWAIT, MT_DATA); 2197 if (n && len > MHLEN) { 2198 MCLGET(n, M_DONTWAIT); 2199 if ((n->m_flags & M_EXT) == 0) { 2200 m_freem(n); 2201 n = NULL; 2202 } 2203 } 2204 if (!n) 2205 return key_senderror(so, m, ENOBUFS); 2206 2207 n->m_len = len; 2208 n->m_next = NULL; 2209 off = 0; 2210 2211 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2212 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2213 2214 #ifdef DIAGNOSTIC 2215 if (off != len) 2216 panic("length inconsistency in key_spddelete2"); 2217 #endif 2218 2219 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2220 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2221 if (!n->m_next) { 2222 m_freem(n); 2223 return key_senderror(so, m, ENOBUFS); 2224 } 2225 2226 n->m_pkthdr.len = 0; 2227 for (nn = n; nn; nn = nn->m_next) 2228 n->m_pkthdr.len += nn->m_len; 2229 2230 newmsg = mtod(n, struct sadb_msg *); 2231 newmsg->sadb_msg_errno = 0; 2232 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2233 2234 m_freem(m); 2235 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2236 } 2237 } 2238 2239 /* 2240 * SADB_X_GET processing 2241 * receive 2242 * <base, policy(*)> 2243 * from the user(?), 2244 * and send, 2245 * <base, address(SD), policy> 2246 * to the ikmpd. 2247 * policy(*) including direction of policy. 2248 * 2249 * m will always be freed. 2250 */ 2251 static int 2252 key_spdget(struct socket *so, struct mbuf *m, 2253 const struct sadb_msghdr *mhp) 2254 { 2255 u_int32_t id; 2256 struct secpolicy *sp; 2257 struct mbuf *n; 2258 2259 /* sanity check */ 2260 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2261 panic("key_spdget: NULL pointer is passed"); 2262 2263 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2264 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2265 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2266 return key_senderror(so, m, EINVAL); 2267 } 2268 2269 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2270 2271 /* Is there SP in SPD ? */ 2272 if ((sp = key_getspbyid(id)) == NULL) { 2273 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2274 return key_senderror(so, m, ENOENT); 2275 } 2276 2277 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2278 mhp->msg->sadb_msg_pid); 2279 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2280 if (n != NULL) { 2281 m_freem(m); 2282 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2283 } else 2284 return key_senderror(so, m, ENOBUFS); 2285 } 2286 2287 /* 2288 * SADB_X_SPDACQUIRE processing. 2289 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2290 * send 2291 * <base, policy(*)> 2292 * to KMD, and expect to receive 2293 * <base> with SADB_X_SPDACQUIRE if error occurred, 2294 * or 2295 * <base, policy> 2296 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2297 * policy(*) is without policy requests. 2298 * 2299 * 0 : succeed 2300 * others: error number 2301 */ 2302 int 2303 key_spdacquire(struct secpolicy *sp) 2304 { 2305 struct mbuf *result = NULL, *m; 2306 struct secspacq *newspacq; 2307 int error; 2308 2309 /* sanity check */ 2310 if (sp == NULL) 2311 panic("key_spdacquire: NULL pointer is passed"); 2312 if (sp->req != NULL) 2313 panic("key_spdacquire: called but there is request"); 2314 if (sp->policy != IPSEC_POLICY_IPSEC) 2315 panic("key_spdacquire: policy mismathed. IPsec is expected"); 2316 2317 /* Get an entry to check whether sent message or not. */ 2318 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2319 if (key_blockacq_count < newspacq->count) { 2320 /* reset counter and do send message. */ 2321 newspacq->count = 0; 2322 } else { 2323 /* increment counter and do nothing. */ 2324 newspacq->count++; 2325 return 0; 2326 } 2327 } else { 2328 /* make new entry for blocking to send SADB_ACQUIRE. */ 2329 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2330 return ENOBUFS; 2331 2332 /* add to acqtree */ 2333 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2334 } 2335 2336 /* create new sadb_msg to reply. */ 2337 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2338 if (!m) { 2339 error = ENOBUFS; 2340 goto fail; 2341 } 2342 result = m; 2343 2344 result->m_pkthdr.len = 0; 2345 for (m = result; m; m = m->m_next) 2346 result->m_pkthdr.len += m->m_len; 2347 2348 mtod(result, struct sadb_msg *)->sadb_msg_len = 2349 PFKEY_UNIT64(result->m_pkthdr.len); 2350 2351 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2352 2353 fail: 2354 if (result) 2355 m_freem(result); 2356 return error; 2357 } 2358 2359 /* 2360 * SADB_SPDFLUSH processing 2361 * receive 2362 * <base> 2363 * from the user, and free all entries in secpctree. 2364 * and send, 2365 * <base> 2366 * to the user. 2367 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2368 * 2369 * m will always be freed. 2370 */ 2371 static int 2372 key_spdflush(struct socket *so, struct mbuf *m, 2373 const struct sadb_msghdr *mhp) 2374 { 2375 struct sadb_msg *newmsg; 2376 struct secpolicy *sp; 2377 u_int dir; 2378 2379 /* sanity check */ 2380 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2381 panic("key_spdflush: NULL pointer is passed"); 2382 2383 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2384 return key_senderror(so, m, EINVAL); 2385 2386 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2387 struct secpolicy * nextsp; 2388 for (sp = LIST_FIRST(&sptree[dir]); 2389 sp != NULL; 2390 sp = nextsp) { 2391 2392 nextsp = LIST_NEXT(sp, chain); 2393 if (sp->state == IPSEC_SPSTATE_DEAD) 2394 continue; 2395 key_sp_dead(sp); 2396 key_sp_unlink(sp); 2397 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2398 continue; 2399 } 2400 } 2401 2402 #if defined(__NetBSD__) 2403 /* Invalidate all cached SPD pointers in the PCBs. */ 2404 ipsec_invalpcbcacheall(); 2405 2406 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2407 #endif /* __NetBSD__ */ 2408 2409 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2410 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2411 return key_senderror(so, m, ENOBUFS); 2412 } 2413 2414 if (m->m_next) 2415 m_freem(m->m_next); 2416 m->m_next = NULL; 2417 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2418 newmsg = mtod(m, struct sadb_msg *); 2419 newmsg->sadb_msg_errno = 0; 2420 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2421 2422 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2423 } 2424 2425 static struct sockaddr key_src = { 2426 .sa_len = 2, 2427 .sa_family = PF_KEY, 2428 }; 2429 2430 static struct mbuf * 2431 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2432 { 2433 struct secpolicy *sp; 2434 int cnt; 2435 u_int dir; 2436 struct mbuf *m, *n, *prev; 2437 int totlen; 2438 2439 *lenp = 0; 2440 2441 /* search SPD entry and get buffer size. */ 2442 cnt = 0; 2443 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2444 LIST_FOREACH(sp, &sptree[dir], chain) { 2445 cnt++; 2446 } 2447 } 2448 2449 if (cnt == 0) { 2450 *errorp = ENOENT; 2451 return (NULL); 2452 } 2453 2454 m = NULL; 2455 prev = m; 2456 totlen = 0; 2457 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2458 LIST_FOREACH(sp, &sptree[dir], chain) { 2459 --cnt; 2460 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2461 2462 if (!n) { 2463 *errorp = ENOBUFS; 2464 if (m) m_freem(m); 2465 return (NULL); 2466 } 2467 2468 totlen += n->m_pkthdr.len; 2469 if (!m) { 2470 m = n; 2471 } else { 2472 prev->m_nextpkt = n; 2473 } 2474 prev = n; 2475 } 2476 } 2477 2478 *lenp = totlen; 2479 *errorp = 0; 2480 return (m); 2481 } 2482 2483 /* 2484 * SADB_SPDDUMP processing 2485 * receive 2486 * <base> 2487 * from the user, and dump all SP leaves 2488 * and send, 2489 * <base> ..... 2490 * to the ikmpd. 2491 * 2492 * m will always be freed. 2493 */ 2494 static int 2495 key_spddump(struct socket *so, struct mbuf *m0, 2496 const struct sadb_msghdr *mhp) 2497 { 2498 struct mbuf *n; 2499 int error, len; 2500 int ok, s; 2501 pid_t pid; 2502 2503 /* sanity check */ 2504 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 2505 panic("key_spddump: NULL pointer is passed"); 2506 2507 2508 pid = mhp->msg->sadb_msg_pid; 2509 /* 2510 * If the requestor has insufficient socket-buffer space 2511 * for the entire chain, nobody gets any response to the DUMP. 2512 * XXX For now, only the requestor ever gets anything. 2513 * Moreover, if the requestor has any space at all, they receive 2514 * the entire chain, otherwise the request is refused with ENOBUFS. 2515 */ 2516 if (sbspace(&so->so_rcv) <= 0) { 2517 return key_senderror(so, m0, ENOBUFS); 2518 } 2519 2520 s = splsoftnet(); 2521 n = key_setspddump_chain(&error, &len, pid); 2522 splx(s); 2523 2524 if (n == NULL) { 2525 return key_senderror(so, m0, ENOENT); 2526 } 2527 { 2528 uint64_t *ps = PFKEY_STAT_GETREF(); 2529 ps[PFKEY_STAT_IN_TOTAL]++; 2530 ps[PFKEY_STAT_IN_BYTES] += len; 2531 PFKEY_STAT_PUTREF(); 2532 } 2533 2534 /* 2535 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2536 * The requestor receives either the entire chain, or an 2537 * error message with ENOBUFS. 2538 */ 2539 2540 /* 2541 * sbappendchainwith record takes the chain of entries, one 2542 * packet-record per SPD entry, prepends the key_src sockaddr 2543 * to each packet-record, links the sockaddr mbufs into a new 2544 * list of records, then appends the entire resulting 2545 * list to the requesting socket. 2546 */ 2547 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2548 n, SB_PRIO_ONESHOT_OVERFLOW); 2549 2550 if (!ok) { 2551 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2552 m_freem(n); 2553 return key_senderror(so, m0, ENOBUFS); 2554 } 2555 2556 m_freem(m0); 2557 return error; 2558 } 2559 2560 #ifdef IPSEC_NAT_T 2561 /* 2562 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2563 */ 2564 static int 2565 key_nat_map(struct socket *so, struct mbuf *m, 2566 const struct sadb_msghdr *mhp) 2567 { 2568 struct sadb_x_nat_t_type *type; 2569 struct sadb_x_nat_t_port *sport; 2570 struct sadb_x_nat_t_port *dport; 2571 struct sadb_address *addr; 2572 struct sadb_x_nat_t_frag *frag; 2573 2574 /* sanity check */ 2575 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2576 panic("key_nat_map: NULL pointer is passed."); 2577 2578 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2579 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2580 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2581 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2582 return key_senderror(so, m, EINVAL); 2583 } 2584 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2585 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2586 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2587 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2588 return key_senderror(so, m, EINVAL); 2589 } 2590 2591 if ((mhp->ext[SADB_X_EXT_NAT_T_OA] != NULL) && 2592 (mhp->extlen[SADB_X_EXT_NAT_T_OA] < sizeof(*addr))) { 2593 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2594 return key_senderror(so, m, EINVAL); 2595 } 2596 2597 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2598 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2599 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2600 return key_senderror(so, m, EINVAL); 2601 } 2602 2603 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2604 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2605 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2606 addr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OA]; 2607 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2608 2609 printf("sadb_nat_map called\n"); 2610 2611 /* 2612 * XXX handle that, it should also contain a SA, or anything 2613 * that enable to update the SA information. 2614 */ 2615 2616 return 0; 2617 } 2618 #endif /* IPSEC_NAT_T */ 2619 2620 static struct mbuf * 2621 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2622 { 2623 struct mbuf *result = NULL, *m; 2624 2625 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2626 if (!m) 2627 goto fail; 2628 result = m; 2629 2630 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2631 &sp->spidx.src.sa, sp->spidx.prefs, 2632 sp->spidx.ul_proto); 2633 if (!m) 2634 goto fail; 2635 m_cat(result, m); 2636 2637 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2638 &sp->spidx.dst.sa, sp->spidx.prefd, 2639 sp->spidx.ul_proto); 2640 if (!m) 2641 goto fail; 2642 m_cat(result, m); 2643 2644 m = key_sp2msg(sp); 2645 if (!m) 2646 goto fail; 2647 m_cat(result, m); 2648 2649 if ((result->m_flags & M_PKTHDR) == 0) 2650 goto fail; 2651 2652 if (result->m_len < sizeof(struct sadb_msg)) { 2653 result = m_pullup(result, sizeof(struct sadb_msg)); 2654 if (result == NULL) 2655 goto fail; 2656 } 2657 2658 result->m_pkthdr.len = 0; 2659 for (m = result; m; m = m->m_next) 2660 result->m_pkthdr.len += m->m_len; 2661 2662 mtod(result, struct sadb_msg *)->sadb_msg_len = 2663 PFKEY_UNIT64(result->m_pkthdr.len); 2664 2665 return result; 2666 2667 fail: 2668 m_freem(result); 2669 return NULL; 2670 } 2671 2672 /* 2673 * get PFKEY message length for security policy and request. 2674 */ 2675 static u_int 2676 key_getspreqmsglen(struct secpolicy *sp) 2677 { 2678 u_int tlen; 2679 2680 tlen = sizeof(struct sadb_x_policy); 2681 2682 /* if is the policy for ipsec ? */ 2683 if (sp->policy != IPSEC_POLICY_IPSEC) 2684 return tlen; 2685 2686 /* get length of ipsec requests */ 2687 { 2688 struct ipsecrequest *isr; 2689 int len; 2690 2691 for (isr = sp->req; isr != NULL; isr = isr->next) { 2692 len = sizeof(struct sadb_x_ipsecrequest) 2693 + isr->saidx.src.sa.sa_len 2694 + isr->saidx.dst.sa.sa_len; 2695 2696 tlen += PFKEY_ALIGN8(len); 2697 } 2698 } 2699 2700 return tlen; 2701 } 2702 2703 /* 2704 * SADB_SPDEXPIRE processing 2705 * send 2706 * <base, address(SD), lifetime(CH), policy> 2707 * to KMD by PF_KEY. 2708 * 2709 * OUT: 0 : succeed 2710 * others : error number 2711 */ 2712 static int 2713 key_spdexpire(struct secpolicy *sp) 2714 { 2715 int s; 2716 struct mbuf *result = NULL, *m; 2717 int len; 2718 int error = -1; 2719 struct sadb_lifetime *lt; 2720 2721 /* XXX: Why do we lock ? */ 2722 s = splsoftnet(); /*called from softclock()*/ 2723 2724 /* sanity check */ 2725 if (sp == NULL) 2726 panic("key_spdexpire: NULL pointer is passed"); 2727 2728 /* set msg header */ 2729 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2730 if (!m) { 2731 error = ENOBUFS; 2732 goto fail; 2733 } 2734 result = m; 2735 2736 /* create lifetime extension (current and hard) */ 2737 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2738 m = key_alloc_mbuf(len); 2739 if (!m || m->m_next) { /*XXX*/ 2740 if (m) 2741 m_freem(m); 2742 error = ENOBUFS; 2743 goto fail; 2744 } 2745 memset(mtod(m, void *), 0, len); 2746 lt = mtod(m, struct sadb_lifetime *); 2747 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2748 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2749 lt->sadb_lifetime_allocations = 0; 2750 lt->sadb_lifetime_bytes = 0; 2751 lt->sadb_lifetime_addtime = sp->created; 2752 lt->sadb_lifetime_usetime = sp->lastused; 2753 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2754 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2755 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2756 lt->sadb_lifetime_allocations = 0; 2757 lt->sadb_lifetime_bytes = 0; 2758 lt->sadb_lifetime_addtime = sp->lifetime; 2759 lt->sadb_lifetime_usetime = sp->validtime; 2760 m_cat(result, m); 2761 2762 /* set sadb_address for source */ 2763 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2764 &sp->spidx.src.sa, 2765 sp->spidx.prefs, sp->spidx.ul_proto); 2766 if (!m) { 2767 error = ENOBUFS; 2768 goto fail; 2769 } 2770 m_cat(result, m); 2771 2772 /* set sadb_address for destination */ 2773 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2774 &sp->spidx.dst.sa, 2775 sp->spidx.prefd, sp->spidx.ul_proto); 2776 if (!m) { 2777 error = ENOBUFS; 2778 goto fail; 2779 } 2780 m_cat(result, m); 2781 2782 /* set secpolicy */ 2783 m = key_sp2msg(sp); 2784 if (!m) { 2785 error = ENOBUFS; 2786 goto fail; 2787 } 2788 m_cat(result, m); 2789 2790 if ((result->m_flags & M_PKTHDR) == 0) { 2791 error = EINVAL; 2792 goto fail; 2793 } 2794 2795 if (result->m_len < sizeof(struct sadb_msg)) { 2796 result = m_pullup(result, sizeof(struct sadb_msg)); 2797 if (result == NULL) { 2798 error = ENOBUFS; 2799 goto fail; 2800 } 2801 } 2802 2803 result->m_pkthdr.len = 0; 2804 for (m = result; m; m = m->m_next) 2805 result->m_pkthdr.len += m->m_len; 2806 2807 mtod(result, struct sadb_msg *)->sadb_msg_len = 2808 PFKEY_UNIT64(result->m_pkthdr.len); 2809 2810 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2811 2812 fail: 2813 if (result) 2814 m_freem(result); 2815 splx(s); 2816 return error; 2817 } 2818 2819 /* %%% SAD management */ 2820 /* 2821 * allocating a memory for new SA head, and copy from the values of mhp. 2822 * OUT: NULL : failure due to the lack of memory. 2823 * others : pointer to new SA head. 2824 */ 2825 static struct secashead * 2826 key_newsah(struct secasindex *saidx) 2827 { 2828 struct secashead *newsah; 2829 2830 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx")); 2831 2832 newsah = (struct secashead *) 2833 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2834 if (newsah != NULL) { 2835 int i; 2836 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2837 LIST_INIT(&newsah->savtree[i]); 2838 newsah->saidx = *saidx; 2839 2840 /* add to saidxtree */ 2841 newsah->state = SADB_SASTATE_MATURE; 2842 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2843 } 2844 return(newsah); 2845 } 2846 2847 /* 2848 * delete SA index and all SA registerd. 2849 */ 2850 static void 2851 key_delsah(struct secashead *sah) 2852 { 2853 struct secasvar *sav, *nextsav; 2854 u_int stateidx, state; 2855 int s; 2856 int zombie = 0; 2857 2858 /* sanity check */ 2859 if (sah == NULL) 2860 panic("key_delsah: NULL pointer is passed"); 2861 2862 s = splsoftnet(); /*called from softclock()*/ 2863 2864 /* searching all SA registerd in the secindex. */ 2865 for (stateidx = 0; 2866 stateidx < _ARRAYLEN(saorder_state_any); 2867 stateidx++) { 2868 2869 state = saorder_state_any[stateidx]; 2870 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2871 sav != NULL; 2872 sav = nextsav) { 2873 2874 nextsav = LIST_NEXT(sav, chain); 2875 2876 if (sav->refcnt == 0) { 2877 /* sanity check */ 2878 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2879 KEY_FREESAV(&sav); 2880 } else { 2881 /* give up to delete this sa */ 2882 zombie++; 2883 } 2884 } 2885 } 2886 2887 /* don't delete sah only if there are savs. */ 2888 if (zombie) { 2889 splx(s); 2890 return; 2891 } 2892 2893 rtcache_free(&sah->sa_route); 2894 2895 /* remove from tree of SA index */ 2896 if (__LIST_CHAINED(sah)) 2897 LIST_REMOVE(sah, chain); 2898 2899 KFREE(sah); 2900 2901 splx(s); 2902 return; 2903 } 2904 2905 /* 2906 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2907 * and copy the values of mhp into new buffer. 2908 * When SAD message type is GETSPI: 2909 * to set sequence number from acq_seq++, 2910 * to set zero to SPI. 2911 * not to call key_setsava(). 2912 * OUT: NULL : fail 2913 * others : pointer to new secasvar. 2914 * 2915 * does not modify mbuf. does not free mbuf on error. 2916 */ 2917 static struct secasvar * 2918 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2919 struct secashead *sah, int *errp, 2920 const char* where, int tag) 2921 { 2922 struct secasvar *newsav; 2923 const struct sadb_sa *xsa; 2924 2925 /* sanity check */ 2926 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) 2927 panic("key_newsa: NULL pointer is passed"); 2928 2929 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2930 if (newsav == NULL) { 2931 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2932 *errp = ENOBUFS; 2933 goto done; 2934 } 2935 memset(newsav, 0, sizeof(struct secasvar)); 2936 2937 switch (mhp->msg->sadb_msg_type) { 2938 case SADB_GETSPI: 2939 newsav->spi = 0; 2940 2941 #ifdef IPSEC_DOSEQCHECK 2942 /* sync sequence number */ 2943 if (mhp->msg->sadb_msg_seq == 0) 2944 newsav->seq = 2945 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2946 else 2947 #endif 2948 newsav->seq = mhp->msg->sadb_msg_seq; 2949 break; 2950 2951 case SADB_ADD: 2952 /* sanity check */ 2953 if (mhp->ext[SADB_EXT_SA] == NULL) { 2954 KFREE(newsav), newsav = NULL; 2955 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2956 *errp = EINVAL; 2957 goto done; 2958 } 2959 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2960 newsav->spi = xsa->sadb_sa_spi; 2961 newsav->seq = mhp->msg->sadb_msg_seq; 2962 break; 2963 default: 2964 KFREE(newsav), newsav = NULL; 2965 *errp = EINVAL; 2966 goto done; 2967 } 2968 2969 /* copy sav values */ 2970 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2971 *errp = key_setsaval(newsav, m, mhp); 2972 if (*errp) { 2973 KFREE(newsav), newsav = NULL; 2974 goto done; 2975 } 2976 } 2977 2978 /* reset created */ 2979 newsav->created = time_second; 2980 newsav->pid = mhp->msg->sadb_msg_pid; 2981 2982 /* add to satree */ 2983 newsav->sah = sah; 2984 newsav->refcnt = 1; 2985 newsav->state = SADB_SASTATE_LARVAL; 2986 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2987 secasvar, chain); 2988 done: 2989 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2990 printf("DP key_newsav from %s:%u return SP:%p\n", 2991 where, tag, newsav)); 2992 2993 return newsav; 2994 } 2995 2996 /* 2997 * free() SA variable entry. 2998 */ 2999 static void 3000 key_delsav(struct secasvar *sav) 3001 { 3002 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav")); 3003 IPSEC_ASSERT(sav->refcnt == 0, 3004 ("key_delsav: reference count %u > 0", sav->refcnt)); 3005 3006 /* remove from SA header */ 3007 if (__LIST_CHAINED(sav)) 3008 LIST_REMOVE(sav, chain); 3009 3010 /* 3011 * Cleanup xform state. Note that zeroize'ing causes the 3012 * keys to be cleared; otherwise we must do it ourself. 3013 */ 3014 if (sav->tdb_xform != NULL) { 3015 sav->tdb_xform->xf_zeroize(sav); 3016 sav->tdb_xform = NULL; 3017 } else { 3018 if (sav->key_auth != NULL) 3019 memset(_KEYBUF(sav->key_auth), 0, _KEYLEN(sav->key_auth)); 3020 if (sav->key_enc != NULL) 3021 memset(_KEYBUF(sav->key_enc), 0, _KEYLEN(sav->key_enc)); 3022 } 3023 if (sav->key_auth != NULL) { 3024 KFREE(sav->key_auth); 3025 sav->key_auth = NULL; 3026 } 3027 if (sav->key_enc != NULL) { 3028 KFREE(sav->key_enc); 3029 sav->key_enc = NULL; 3030 } 3031 if (sav->sched) { 3032 memset(sav->sched, 0, sav->schedlen); 3033 KFREE(sav->sched); 3034 sav->sched = NULL; 3035 } 3036 if (sav->replay != NULL) { 3037 KFREE(sav->replay); 3038 sav->replay = NULL; 3039 } 3040 if (sav->lft_c != NULL) { 3041 KFREE(sav->lft_c); 3042 sav->lft_c = NULL; 3043 } 3044 if (sav->lft_h != NULL) { 3045 KFREE(sav->lft_h); 3046 sav->lft_h = NULL; 3047 } 3048 if (sav->lft_s != NULL) { 3049 KFREE(sav->lft_s); 3050 sav->lft_s = NULL; 3051 } 3052 if (sav->iv != NULL) { 3053 KFREE(sav->iv); 3054 sav->iv = NULL; 3055 } 3056 3057 KFREE(sav); 3058 3059 return; 3060 } 3061 3062 /* 3063 * search SAD. 3064 * OUT: 3065 * NULL : not found 3066 * others : found, pointer to a SA. 3067 */ 3068 static struct secashead * 3069 key_getsah(struct secasindex *saidx) 3070 { 3071 struct secashead *sah; 3072 3073 LIST_FOREACH(sah, &sahtree, chain) { 3074 if (sah->state == SADB_SASTATE_DEAD) 3075 continue; 3076 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3077 return sah; 3078 } 3079 3080 return NULL; 3081 } 3082 3083 /* 3084 * check not to be duplicated SPI. 3085 * NOTE: this function is too slow due to searching all SAD. 3086 * OUT: 3087 * NULL : not found 3088 * others : found, pointer to a SA. 3089 */ 3090 static struct secasvar * 3091 key_checkspidup(struct secasindex *saidx, u_int32_t spi) 3092 { 3093 struct secashead *sah; 3094 struct secasvar *sav; 3095 3096 /* check address family */ 3097 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3098 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3099 return NULL; 3100 } 3101 3102 /* check all SAD */ 3103 LIST_FOREACH(sah, &sahtree, chain) { 3104 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3105 continue; 3106 sav = key_getsavbyspi(sah, spi); 3107 if (sav != NULL) 3108 return sav; 3109 } 3110 3111 return NULL; 3112 } 3113 3114 /* 3115 * search SAD litmited alive SA, protocol, SPI. 3116 * OUT: 3117 * NULL : not found 3118 * others : found, pointer to a SA. 3119 */ 3120 static struct secasvar * 3121 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3122 { 3123 struct secasvar *sav; 3124 u_int stateidx, state; 3125 3126 /* search all status */ 3127 for (stateidx = 0; 3128 stateidx < _ARRAYLEN(saorder_state_alive); 3129 stateidx++) { 3130 3131 state = saorder_state_alive[stateidx]; 3132 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3133 3134 /* sanity check */ 3135 if (sav->state != state) { 3136 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3137 "invalid sav->state (queue: %d SA: %d)\n", 3138 state, sav->state)); 3139 continue; 3140 } 3141 3142 if (sav->spi == spi) 3143 return sav; 3144 } 3145 } 3146 3147 return NULL; 3148 } 3149 3150 /* 3151 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3152 * You must update these if need. 3153 * OUT: 0: success. 3154 * !0: failure. 3155 * 3156 * does not modify mbuf. does not free mbuf on error. 3157 */ 3158 static int 3159 key_setsaval(struct secasvar *sav, struct mbuf *m, 3160 const struct sadb_msghdr *mhp) 3161 { 3162 int error = 0; 3163 3164 /* sanity check */ 3165 if (m == NULL || mhp == NULL || mhp->msg == NULL) 3166 panic("key_setsaval: NULL pointer is passed"); 3167 3168 /* initialization */ 3169 sav->replay = NULL; 3170 sav->key_auth = NULL; 3171 sav->key_enc = NULL; 3172 sav->sched = NULL; 3173 sav->schedlen = 0; 3174 sav->iv = NULL; 3175 sav->lft_c = NULL; 3176 sav->lft_h = NULL; 3177 sav->lft_s = NULL; 3178 sav->tdb_xform = NULL; /* transform */ 3179 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3180 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3181 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3182 #ifdef IPSEC_NAT_T 3183 sav->natt_type = 0; 3184 sav->esp_frag = 0; 3185 #endif 3186 3187 /* SA */ 3188 if (mhp->ext[SADB_EXT_SA] != NULL) { 3189 const struct sadb_sa *sa0; 3190 3191 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3192 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3193 error = EINVAL; 3194 goto fail; 3195 } 3196 3197 sav->alg_auth = sa0->sadb_sa_auth; 3198 sav->alg_enc = sa0->sadb_sa_encrypt; 3199 sav->flags = sa0->sadb_sa_flags; 3200 3201 /* replay window */ 3202 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3203 sav->replay = (struct secreplay *) 3204 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3205 if (sav->replay == NULL) { 3206 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3207 error = ENOBUFS; 3208 goto fail; 3209 } 3210 if (sa0->sadb_sa_replay != 0) 3211 sav->replay->bitmap = (char*)(sav->replay+1); 3212 sav->replay->wsize = sa0->sadb_sa_replay; 3213 } 3214 } 3215 3216 /* Authentication keys */ 3217 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3218 const struct sadb_key *key0; 3219 int len; 3220 3221 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3222 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3223 3224 error = 0; 3225 if (len < sizeof(*key0)) { 3226 error = EINVAL; 3227 goto fail; 3228 } 3229 switch (mhp->msg->sadb_msg_satype) { 3230 case SADB_SATYPE_AH: 3231 case SADB_SATYPE_ESP: 3232 case SADB_X_SATYPE_TCPSIGNATURE: 3233 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3234 sav->alg_auth != SADB_X_AALG_NULL) 3235 error = EINVAL; 3236 break; 3237 case SADB_X_SATYPE_IPCOMP: 3238 default: 3239 error = EINVAL; 3240 break; 3241 } 3242 if (error) { 3243 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3244 goto fail; 3245 } 3246 3247 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3248 if (sav->key_auth == NULL) { 3249 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3250 error = ENOBUFS; 3251 goto fail; 3252 } 3253 } 3254 3255 /* Encryption key */ 3256 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3257 const struct sadb_key *key0; 3258 int len; 3259 3260 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3261 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3262 3263 error = 0; 3264 if (len < sizeof(*key0)) { 3265 error = EINVAL; 3266 goto fail; 3267 } 3268 switch (mhp->msg->sadb_msg_satype) { 3269 case SADB_SATYPE_ESP: 3270 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3271 sav->alg_enc != SADB_EALG_NULL) { 3272 error = EINVAL; 3273 break; 3274 } 3275 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3276 if (sav->key_enc == NULL) { 3277 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3278 error = ENOBUFS; 3279 goto fail; 3280 } 3281 break; 3282 case SADB_X_SATYPE_IPCOMP: 3283 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3284 error = EINVAL; 3285 sav->key_enc = NULL; /*just in case*/ 3286 break; 3287 case SADB_SATYPE_AH: 3288 case SADB_X_SATYPE_TCPSIGNATURE: 3289 default: 3290 error = EINVAL; 3291 break; 3292 } 3293 if (error) { 3294 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3295 goto fail; 3296 } 3297 } 3298 3299 /* set iv */ 3300 sav->ivlen = 0; 3301 3302 switch (mhp->msg->sadb_msg_satype) { 3303 case SADB_SATYPE_AH: 3304 error = xform_init(sav, XF_AH); 3305 break; 3306 case SADB_SATYPE_ESP: 3307 error = xform_init(sav, XF_ESP); 3308 break; 3309 case SADB_X_SATYPE_IPCOMP: 3310 error = xform_init(sav, XF_IPCOMP); 3311 break; 3312 case SADB_X_SATYPE_TCPSIGNATURE: 3313 error = xform_init(sav, XF_TCPSIGNATURE); 3314 break; 3315 } 3316 if (error) { 3317 ipseclog((LOG_DEBUG, 3318 "key_setsaval: unable to initialize SA type %u.\n", 3319 mhp->msg->sadb_msg_satype)); 3320 goto fail; 3321 } 3322 3323 /* reset created */ 3324 sav->created = time_second; 3325 3326 /* make lifetime for CURRENT */ 3327 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3328 sizeof(struct sadb_lifetime)); 3329 if (sav->lft_c == NULL) { 3330 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3331 error = ENOBUFS; 3332 goto fail; 3333 } 3334 3335 sav->lft_c->sadb_lifetime_len = 3336 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3337 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3338 sav->lft_c->sadb_lifetime_allocations = 0; 3339 sav->lft_c->sadb_lifetime_bytes = 0; 3340 sav->lft_c->sadb_lifetime_addtime = time_second; 3341 sav->lft_c->sadb_lifetime_usetime = 0; 3342 3343 /* lifetimes for HARD and SOFT */ 3344 { 3345 const struct sadb_lifetime *lft0; 3346 3347 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3348 if (lft0 != NULL) { 3349 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3350 error = EINVAL; 3351 goto fail; 3352 } 3353 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3354 sizeof(*lft0)); 3355 if (sav->lft_h == NULL) { 3356 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3357 error = ENOBUFS; 3358 goto fail; 3359 } 3360 /* to be initialize ? */ 3361 } 3362 3363 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3364 if (lft0 != NULL) { 3365 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3366 error = EINVAL; 3367 goto fail; 3368 } 3369 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3370 sizeof(*lft0)); 3371 if (sav->lft_s == NULL) { 3372 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3373 error = ENOBUFS; 3374 goto fail; 3375 } 3376 /* to be initialize ? */ 3377 } 3378 } 3379 3380 return 0; 3381 3382 fail: 3383 /* initialization */ 3384 if (sav->replay != NULL) { 3385 KFREE(sav->replay); 3386 sav->replay = NULL; 3387 } 3388 if (sav->key_auth != NULL) { 3389 KFREE(sav->key_auth); 3390 sav->key_auth = NULL; 3391 } 3392 if (sav->key_enc != NULL) { 3393 KFREE(sav->key_enc); 3394 sav->key_enc = NULL; 3395 } 3396 if (sav->sched) { 3397 KFREE(sav->sched); 3398 sav->sched = NULL; 3399 } 3400 if (sav->iv != NULL) { 3401 KFREE(sav->iv); 3402 sav->iv = NULL; 3403 } 3404 if (sav->lft_c != NULL) { 3405 KFREE(sav->lft_c); 3406 sav->lft_c = NULL; 3407 } 3408 if (sav->lft_h != NULL) { 3409 KFREE(sav->lft_h); 3410 sav->lft_h = NULL; 3411 } 3412 if (sav->lft_s != NULL) { 3413 KFREE(sav->lft_s); 3414 sav->lft_s = NULL; 3415 } 3416 3417 return error; 3418 } 3419 3420 /* 3421 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3422 * OUT: 0: valid 3423 * other: errno 3424 */ 3425 static int 3426 key_mature(struct secasvar *sav) 3427 { 3428 int error; 3429 3430 /* check SPI value */ 3431 switch (sav->sah->saidx.proto) { 3432 case IPPROTO_ESP: 3433 case IPPROTO_AH: 3434 if (ntohl(sav->spi) <= 255) { 3435 ipseclog((LOG_DEBUG, 3436 "key_mature: illegal range of SPI %u.\n", 3437 (u_int32_t)ntohl(sav->spi))); 3438 return EINVAL; 3439 } 3440 break; 3441 } 3442 3443 /* check satype */ 3444 switch (sav->sah->saidx.proto) { 3445 case IPPROTO_ESP: 3446 /* check flags */ 3447 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3448 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3449 ipseclog((LOG_DEBUG, "key_mature: " 3450 "invalid flag (derived) given to old-esp.\n")); 3451 return EINVAL; 3452 } 3453 error = xform_init(sav, XF_ESP); 3454 break; 3455 case IPPROTO_AH: 3456 /* check flags */ 3457 if (sav->flags & SADB_X_EXT_DERIV) { 3458 ipseclog((LOG_DEBUG, "key_mature: " 3459 "invalid flag (derived) given to AH SA.\n")); 3460 return EINVAL; 3461 } 3462 if (sav->alg_enc != SADB_EALG_NONE) { 3463 ipseclog((LOG_DEBUG, "key_mature: " 3464 "protocol and algorithm mismated.\n")); 3465 return(EINVAL); 3466 } 3467 error = xform_init(sav, XF_AH); 3468 break; 3469 case IPPROTO_IPCOMP: 3470 if (sav->alg_auth != SADB_AALG_NONE) { 3471 ipseclog((LOG_DEBUG, "key_mature: " 3472 "protocol and algorithm mismated.\n")); 3473 return(EINVAL); 3474 } 3475 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3476 && ntohl(sav->spi) >= 0x10000) { 3477 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3478 return(EINVAL); 3479 } 3480 error = xform_init(sav, XF_IPCOMP); 3481 break; 3482 case IPPROTO_TCP: 3483 if (sav->alg_enc != SADB_EALG_NONE) { 3484 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3485 "mismated.\n", __func__)); 3486 return(EINVAL); 3487 } 3488 error = xform_init(sav, XF_TCPSIGNATURE); 3489 break; 3490 default: 3491 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3492 error = EPROTONOSUPPORT; 3493 break; 3494 } 3495 if (error == 0) 3496 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3497 return (error); 3498 } 3499 3500 /* 3501 * subroutine for SADB_GET and SADB_DUMP. 3502 */ 3503 static struct mbuf * 3504 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3505 u_int32_t seq, u_int32_t pid) 3506 { 3507 struct mbuf *result = NULL, *tres = NULL, *m; 3508 int l = 0; 3509 int i; 3510 void *p; 3511 int dumporder[] = { 3512 SADB_EXT_SA, SADB_X_EXT_SA2, 3513 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3514 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3515 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3516 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3517 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3518 #ifdef IPSEC_NAT_T 3519 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 3520 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OA, 3521 SADB_X_EXT_NAT_T_FRAG, 3522 #endif 3523 3524 }; 3525 3526 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3527 if (m == NULL) 3528 goto fail; 3529 result = m; 3530 3531 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3532 m = NULL; 3533 p = NULL; 3534 switch (dumporder[i]) { 3535 case SADB_EXT_SA: 3536 m = key_setsadbsa(sav); 3537 if (!m) 3538 goto fail; 3539 break; 3540 3541 case SADB_X_EXT_SA2: 3542 m = key_setsadbxsa2(sav->sah->saidx.mode, 3543 sav->replay ? sav->replay->count : 0, 3544 sav->sah->saidx.reqid); 3545 if (!m) 3546 goto fail; 3547 break; 3548 3549 case SADB_EXT_ADDRESS_SRC: 3550 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3551 &sav->sah->saidx.src.sa, 3552 FULLMASK, IPSEC_ULPROTO_ANY); 3553 if (!m) 3554 goto fail; 3555 break; 3556 3557 case SADB_EXT_ADDRESS_DST: 3558 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3559 &sav->sah->saidx.dst.sa, 3560 FULLMASK, IPSEC_ULPROTO_ANY); 3561 if (!m) 3562 goto fail; 3563 break; 3564 3565 case SADB_EXT_KEY_AUTH: 3566 if (!sav->key_auth) 3567 continue; 3568 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3569 p = sav->key_auth; 3570 break; 3571 3572 case SADB_EXT_KEY_ENCRYPT: 3573 if (!sav->key_enc) 3574 continue; 3575 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3576 p = sav->key_enc; 3577 break; 3578 3579 case SADB_EXT_LIFETIME_CURRENT: 3580 if (!sav->lft_c) 3581 continue; 3582 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3583 p = sav->lft_c; 3584 break; 3585 3586 case SADB_EXT_LIFETIME_HARD: 3587 if (!sav->lft_h) 3588 continue; 3589 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3590 p = sav->lft_h; 3591 break; 3592 3593 case SADB_EXT_LIFETIME_SOFT: 3594 if (!sav->lft_s) 3595 continue; 3596 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3597 p = sav->lft_s; 3598 break; 3599 3600 #ifdef IPSEC_NAT_T 3601 case SADB_X_EXT_NAT_T_TYPE: 3602 if ((m = key_setsadbxtype(sav->natt_type)) == NULL) 3603 goto fail; 3604 break; 3605 3606 case SADB_X_EXT_NAT_T_DPORT: 3607 if ((m = key_setsadbxport( 3608 key_portfromsaddr(&sav->sah->saidx.dst), 3609 SADB_X_EXT_NAT_T_DPORT)) == NULL) 3610 goto fail; 3611 break; 3612 3613 case SADB_X_EXT_NAT_T_SPORT: 3614 if ((m = key_setsadbxport( 3615 key_portfromsaddr(&sav->sah->saidx.src), 3616 SADB_X_EXT_NAT_T_SPORT)) == NULL) 3617 goto fail; 3618 break; 3619 3620 case SADB_X_EXT_NAT_T_OA: 3621 case SADB_X_EXT_NAT_T_FRAG: 3622 continue; 3623 #endif 3624 3625 case SADB_EXT_ADDRESS_PROXY: 3626 case SADB_EXT_IDENTITY_SRC: 3627 case SADB_EXT_IDENTITY_DST: 3628 /* XXX: should we brought from SPD ? */ 3629 case SADB_EXT_SENSITIVITY: 3630 default: 3631 continue; 3632 } 3633 3634 if ((!m && !p) || (m && p)) 3635 goto fail; 3636 if (p && tres) { 3637 M_PREPEND(tres, l, M_DONTWAIT); 3638 if (!tres) 3639 goto fail; 3640 memcpy(mtod(tres, void *), p, l); 3641 continue; 3642 } 3643 if (p) { 3644 m = key_alloc_mbuf(l); 3645 if (!m) 3646 goto fail; 3647 m_copyback(m, 0, l, p); 3648 } 3649 3650 if (tres) 3651 m_cat(m, tres); 3652 tres = m; 3653 } 3654 3655 m_cat(result, tres); 3656 3657 if (result->m_len < sizeof(struct sadb_msg)) { 3658 result = m_pullup(result, sizeof(struct sadb_msg)); 3659 if (result == NULL) 3660 goto fail; 3661 } 3662 3663 result->m_pkthdr.len = 0; 3664 for (m = result; m; m = m->m_next) 3665 result->m_pkthdr.len += m->m_len; 3666 3667 mtod(result, struct sadb_msg *)->sadb_msg_len = 3668 PFKEY_UNIT64(result->m_pkthdr.len); 3669 3670 return result; 3671 3672 fail: 3673 m_freem(result); 3674 m_freem(tres); 3675 return NULL; 3676 } 3677 3678 3679 #ifdef IPSEC_NAT_T 3680 /* 3681 * set a type in sadb_x_nat_t_type 3682 */ 3683 static struct mbuf * 3684 key_setsadbxtype(u_int16_t type) 3685 { 3686 struct mbuf *m; 3687 size_t len; 3688 struct sadb_x_nat_t_type *p; 3689 3690 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3691 3692 m = key_alloc_mbuf(len); 3693 if (!m || m->m_next) { /*XXX*/ 3694 if (m) 3695 m_freem(m); 3696 return NULL; 3697 } 3698 3699 p = mtod(m, struct sadb_x_nat_t_type *); 3700 3701 memset(p, 0, len); 3702 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3703 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3704 p->sadb_x_nat_t_type_type = type; 3705 3706 return m; 3707 } 3708 /* 3709 * set a port in sadb_x_nat_t_port. port is in network order 3710 */ 3711 static struct mbuf * 3712 key_setsadbxport(u_int16_t port, u_int16_t type) 3713 { 3714 struct mbuf *m; 3715 size_t len; 3716 struct sadb_x_nat_t_port *p; 3717 3718 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3719 3720 m = key_alloc_mbuf(len); 3721 if (!m || m->m_next) { /*XXX*/ 3722 if (m) 3723 m_freem(m); 3724 return NULL; 3725 } 3726 3727 p = mtod(m, struct sadb_x_nat_t_port *); 3728 3729 memset(p, 0, len); 3730 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3731 p->sadb_x_nat_t_port_exttype = type; 3732 p->sadb_x_nat_t_port_port = port; 3733 3734 return m; 3735 } 3736 3737 /* 3738 * Get port from sockaddr, port is in network order 3739 */ 3740 u_int16_t 3741 key_portfromsaddr(const union sockaddr_union *saddr) 3742 { 3743 u_int16_t port; 3744 3745 switch (saddr->sa.sa_family) { 3746 case AF_INET: { 3747 port = saddr->sin.sin_port; 3748 break; 3749 } 3750 #ifdef INET6 3751 case AF_INET6: { 3752 port = saddr->sin6.sin6_port; 3753 break; 3754 } 3755 #endif 3756 default: 3757 printf("key_portfromsaddr: unexpected address family\n"); 3758 port = 0; 3759 break; 3760 } 3761 3762 return port; 3763 } 3764 3765 #endif /* IPSEC_NAT_T */ 3766 3767 /* 3768 * Set port is struct sockaddr. port is in network order 3769 */ 3770 static void 3771 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3772 { 3773 switch (saddr->sa.sa_family) { 3774 case AF_INET: { 3775 saddr->sin.sin_port = port; 3776 break; 3777 } 3778 #ifdef INET6 3779 case AF_INET6: { 3780 saddr->sin6.sin6_port = port; 3781 break; 3782 } 3783 #endif 3784 default: 3785 printf("key_porttosaddr: unexpected address family %d\n", 3786 saddr->sa.sa_family); 3787 break; 3788 } 3789 3790 return; 3791 } 3792 3793 /* 3794 * Safety check sa_len 3795 */ 3796 static int 3797 key_checksalen(const union sockaddr_union *saddr) 3798 { 3799 switch (saddr->sa.sa_family) { 3800 case AF_INET: 3801 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3802 return -1; 3803 break; 3804 #ifdef INET6 3805 case AF_INET6: 3806 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3807 return -1; 3808 break; 3809 #endif 3810 default: 3811 printf("key_checksalen: unexpected sa_family %d\n", 3812 saddr->sa.sa_family); 3813 return -1; 3814 break; 3815 } 3816 return 0; 3817 } 3818 3819 3820 /* 3821 * set data into sadb_msg. 3822 */ 3823 static struct mbuf * 3824 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3825 u_int32_t seq, pid_t pid, u_int16_t reserved) 3826 { 3827 struct mbuf *m; 3828 struct sadb_msg *p; 3829 int len; 3830 3831 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3832 if (len > MCLBYTES) 3833 return NULL; 3834 MGETHDR(m, M_DONTWAIT, MT_DATA); 3835 if (m && len > MHLEN) { 3836 MCLGET(m, M_DONTWAIT); 3837 if ((m->m_flags & M_EXT) == 0) { 3838 m_freem(m); 3839 m = NULL; 3840 } 3841 } 3842 if (!m) 3843 return NULL; 3844 m->m_pkthdr.len = m->m_len = len; 3845 m->m_next = NULL; 3846 3847 p = mtod(m, struct sadb_msg *); 3848 3849 memset(p, 0, len); 3850 p->sadb_msg_version = PF_KEY_V2; 3851 p->sadb_msg_type = type; 3852 p->sadb_msg_errno = 0; 3853 p->sadb_msg_satype = satype; 3854 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3855 p->sadb_msg_reserved = reserved; 3856 p->sadb_msg_seq = seq; 3857 p->sadb_msg_pid = (u_int32_t)pid; 3858 3859 return m; 3860 } 3861 3862 /* 3863 * copy secasvar data into sadb_address. 3864 */ 3865 static struct mbuf * 3866 key_setsadbsa(struct secasvar *sav) 3867 { 3868 struct mbuf *m; 3869 struct sadb_sa *p; 3870 int len; 3871 3872 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3873 m = key_alloc_mbuf(len); 3874 if (!m || m->m_next) { /*XXX*/ 3875 if (m) 3876 m_freem(m); 3877 return NULL; 3878 } 3879 3880 p = mtod(m, struct sadb_sa *); 3881 3882 memset(p, 0, len); 3883 p->sadb_sa_len = PFKEY_UNIT64(len); 3884 p->sadb_sa_exttype = SADB_EXT_SA; 3885 p->sadb_sa_spi = sav->spi; 3886 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3887 p->sadb_sa_state = sav->state; 3888 p->sadb_sa_auth = sav->alg_auth; 3889 p->sadb_sa_encrypt = sav->alg_enc; 3890 p->sadb_sa_flags = sav->flags; 3891 3892 return m; 3893 } 3894 3895 /* 3896 * set data into sadb_address. 3897 */ 3898 static struct mbuf * 3899 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3900 u_int8_t prefixlen, u_int16_t ul_proto) 3901 { 3902 struct mbuf *m; 3903 struct sadb_address *p; 3904 size_t len; 3905 3906 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3907 PFKEY_ALIGN8(saddr->sa_len); 3908 m = key_alloc_mbuf(len); 3909 if (!m || m->m_next) { /*XXX*/ 3910 if (m) 3911 m_freem(m); 3912 return NULL; 3913 } 3914 3915 p = mtod(m, struct sadb_address *); 3916 3917 memset(p, 0, len); 3918 p->sadb_address_len = PFKEY_UNIT64(len); 3919 p->sadb_address_exttype = exttype; 3920 p->sadb_address_proto = ul_proto; 3921 if (prefixlen == FULLMASK) { 3922 switch (saddr->sa_family) { 3923 case AF_INET: 3924 prefixlen = sizeof(struct in_addr) << 3; 3925 break; 3926 case AF_INET6: 3927 prefixlen = sizeof(struct in6_addr) << 3; 3928 break; 3929 default: 3930 ; /*XXX*/ 3931 } 3932 } 3933 p->sadb_address_prefixlen = prefixlen; 3934 p->sadb_address_reserved = 0; 3935 3936 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3937 saddr, saddr->sa_len); 3938 3939 return m; 3940 } 3941 3942 #if 0 3943 /* 3944 * set data into sadb_ident. 3945 */ 3946 static struct mbuf * 3947 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3948 void *string, int stringlen, u_int64_t id) 3949 { 3950 struct mbuf *m; 3951 struct sadb_ident *p; 3952 size_t len; 3953 3954 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3955 m = key_alloc_mbuf(len); 3956 if (!m || m->m_next) { /*XXX*/ 3957 if (m) 3958 m_freem(m); 3959 return NULL; 3960 } 3961 3962 p = mtod(m, struct sadb_ident *); 3963 3964 memset(p, 0, len); 3965 p->sadb_ident_len = PFKEY_UNIT64(len); 3966 p->sadb_ident_exttype = exttype; 3967 p->sadb_ident_type = idtype; 3968 p->sadb_ident_reserved = 0; 3969 p->sadb_ident_id = id; 3970 3971 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3972 string, stringlen); 3973 3974 return m; 3975 } 3976 #endif 3977 3978 /* 3979 * set data into sadb_x_sa2. 3980 */ 3981 static struct mbuf * 3982 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 3983 { 3984 struct mbuf *m; 3985 struct sadb_x_sa2 *p; 3986 size_t len; 3987 3988 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3989 m = key_alloc_mbuf(len); 3990 if (!m || m->m_next) { /*XXX*/ 3991 if (m) 3992 m_freem(m); 3993 return NULL; 3994 } 3995 3996 p = mtod(m, struct sadb_x_sa2 *); 3997 3998 memset(p, 0, len); 3999 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4000 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4001 p->sadb_x_sa2_mode = mode; 4002 p->sadb_x_sa2_reserved1 = 0; 4003 p->sadb_x_sa2_reserved2 = 0; 4004 p->sadb_x_sa2_sequence = seq; 4005 p->sadb_x_sa2_reqid = reqid; 4006 4007 return m; 4008 } 4009 4010 /* 4011 * set data into sadb_x_policy 4012 */ 4013 static struct mbuf * 4014 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 4015 { 4016 struct mbuf *m; 4017 struct sadb_x_policy *p; 4018 size_t len; 4019 4020 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4021 m = key_alloc_mbuf(len); 4022 if (!m || m->m_next) { /*XXX*/ 4023 if (m) 4024 m_freem(m); 4025 return NULL; 4026 } 4027 4028 p = mtod(m, struct sadb_x_policy *); 4029 4030 memset(p, 0, len); 4031 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4032 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4033 p->sadb_x_policy_type = type; 4034 p->sadb_x_policy_dir = dir; 4035 p->sadb_x_policy_id = id; 4036 4037 return m; 4038 } 4039 4040 /* %%% utilities */ 4041 /* 4042 * copy a buffer into the new buffer allocated. 4043 */ 4044 static void * 4045 key_newbuf(const void *src, u_int len) 4046 { 4047 void *new; 4048 4049 KMALLOC(new, void *, len); 4050 if (new == NULL) { 4051 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 4052 return NULL; 4053 } 4054 memcpy(new, src, len); 4055 4056 return new; 4057 } 4058 4059 /* compare my own address 4060 * OUT: 1: true, i.e. my address. 4061 * 0: false 4062 */ 4063 int 4064 key_ismyaddr(struct sockaddr *sa) 4065 { 4066 #ifdef INET 4067 struct sockaddr_in *sin; 4068 struct in_ifaddr *ia; 4069 #endif 4070 4071 /* sanity check */ 4072 if (sa == NULL) 4073 panic("key_ismyaddr: NULL pointer is passed"); 4074 4075 switch (sa->sa_family) { 4076 #ifdef INET 4077 case AF_INET: 4078 sin = (struct sockaddr_in *)sa; 4079 for (ia = in_ifaddrhead.tqh_first; ia; 4080 ia = ia->ia_link.tqe_next) 4081 { 4082 if (sin->sin_family == ia->ia_addr.sin_family && 4083 sin->sin_len == ia->ia_addr.sin_len && 4084 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4085 { 4086 return 1; 4087 } 4088 } 4089 break; 4090 #endif 4091 #ifdef INET6 4092 case AF_INET6: 4093 return key_ismyaddr6((struct sockaddr_in6 *)sa); 4094 #endif 4095 } 4096 4097 return 0; 4098 } 4099 4100 #ifdef INET6 4101 /* 4102 * compare my own address for IPv6. 4103 * 1: ours 4104 * 0: other 4105 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4106 */ 4107 #include <netinet6/in6_var.h> 4108 4109 static int 4110 key_ismyaddr6(struct sockaddr_in6 *sin6) 4111 { 4112 struct in6_ifaddr *ia; 4113 struct in6_multi *in6m; 4114 4115 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 4116 if (key_sockaddrcmp((struct sockaddr *)&sin6, 4117 (struct sockaddr *)&ia->ia_addr, 0) == 0) 4118 return 1; 4119 4120 /* 4121 * XXX Multicast 4122 * XXX why do we care about multlicast here while we don't care 4123 * about IPv4 multicast?? 4124 * XXX scope 4125 */ 4126 in6m = NULL; 4127 #ifdef __FreeBSD__ 4128 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 4129 #else 4130 for ((in6m) = ia->ia6_multiaddrs.lh_first; 4131 (in6m) != NULL && 4132 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); 4133 (in6m) = in6m->in6m_entry.le_next) 4134 continue; 4135 #endif 4136 if (in6m) 4137 return 1; 4138 } 4139 4140 /* loopback, just for safety */ 4141 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4142 return 1; 4143 4144 return 0; 4145 } 4146 #endif /*INET6*/ 4147 4148 /* 4149 * compare two secasindex structure. 4150 * flag can specify to compare 2 saidxes. 4151 * compare two secasindex structure without both mode and reqid. 4152 * don't compare port. 4153 * IN: 4154 * saidx0: source, it can be in SAD. 4155 * saidx1: object. 4156 * OUT: 4157 * 1 : equal 4158 * 0 : not equal 4159 */ 4160 static int 4161 key_cmpsaidx( 4162 const struct secasindex *saidx0, 4163 const struct secasindex *saidx1, 4164 int flag) 4165 { 4166 int chkport = 0; 4167 4168 /* sanity */ 4169 if (saidx0 == NULL && saidx1 == NULL) 4170 return 1; 4171 4172 if (saidx0 == NULL || saidx1 == NULL) 4173 return 0; 4174 4175 if (saidx0->proto != saidx1->proto) 4176 return 0; 4177 4178 if (flag == CMP_EXACTLY) { 4179 if (saidx0->mode != saidx1->mode) 4180 return 0; 4181 if (saidx0->reqid != saidx1->reqid) 4182 return 0; 4183 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4184 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4185 return 0; 4186 } else { 4187 4188 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4189 if (flag == CMP_MODE_REQID 4190 ||flag == CMP_REQID) { 4191 /* 4192 * If reqid of SPD is non-zero, unique SA is required. 4193 * The result must be of same reqid in this case. 4194 */ 4195 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4196 return 0; 4197 } 4198 4199 if (flag == CMP_MODE_REQID) { 4200 if (saidx0->mode != IPSEC_MODE_ANY 4201 && saidx0->mode != saidx1->mode) 4202 return 0; 4203 } 4204 4205 /* 4206 * If NAT-T is enabled, check ports for tunnel mode. 4207 * Don't do it for transport mode, as there is no 4208 * port information available in the SP. 4209 */ 4210 #ifdef IPSEC_NAT_T 4211 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4212 chkport = 1; 4213 #endif 4214 4215 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4216 return 0; 4217 } 4218 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4219 return 0; 4220 } 4221 } 4222 4223 return 1; 4224 } 4225 4226 /* 4227 * compare two secindex structure exactly. 4228 * IN: 4229 * spidx0: source, it is often in SPD. 4230 * spidx1: object, it is often from PFKEY message. 4231 * OUT: 4232 * 1 : equal 4233 * 0 : not equal 4234 */ 4235 int 4236 key_cmpspidx_exactly( 4237 struct secpolicyindex *spidx0, 4238 struct secpolicyindex *spidx1) 4239 { 4240 /* sanity */ 4241 if (spidx0 == NULL && spidx1 == NULL) 4242 return 1; 4243 4244 if (spidx0 == NULL || spidx1 == NULL) 4245 return 0; 4246 4247 if (spidx0->prefs != spidx1->prefs 4248 || spidx0->prefd != spidx1->prefd 4249 || spidx0->ul_proto != spidx1->ul_proto) 4250 return 0; 4251 4252 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4253 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4254 } 4255 4256 /* 4257 * compare two secindex structure with mask. 4258 * IN: 4259 * spidx0: source, it is often in SPD. 4260 * spidx1: object, it is often from IP header. 4261 * OUT: 4262 * 1 : equal 4263 * 0 : not equal 4264 */ 4265 int 4266 key_cmpspidx_withmask( 4267 struct secpolicyindex *spidx0, 4268 struct secpolicyindex *spidx1) 4269 { 4270 /* sanity */ 4271 if (spidx0 == NULL && spidx1 == NULL) 4272 return 1; 4273 4274 if (spidx0 == NULL || spidx1 == NULL) 4275 return 0; 4276 4277 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4278 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4279 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4280 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4281 return 0; 4282 4283 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4284 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4285 && spidx0->ul_proto != spidx1->ul_proto) 4286 return 0; 4287 4288 switch (spidx0->src.sa.sa_family) { 4289 case AF_INET: 4290 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4291 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4292 return 0; 4293 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4294 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4295 return 0; 4296 break; 4297 case AF_INET6: 4298 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4299 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4300 return 0; 4301 /* 4302 * scope_id check. if sin6_scope_id is 0, we regard it 4303 * as a wildcard scope, which matches any scope zone ID. 4304 */ 4305 if (spidx0->src.sin6.sin6_scope_id && 4306 spidx1->src.sin6.sin6_scope_id && 4307 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4308 return 0; 4309 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4310 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4311 return 0; 4312 break; 4313 default: 4314 /* XXX */ 4315 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4316 return 0; 4317 break; 4318 } 4319 4320 switch (spidx0->dst.sa.sa_family) { 4321 case AF_INET: 4322 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4323 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4324 return 0; 4325 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4326 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4327 return 0; 4328 break; 4329 case AF_INET6: 4330 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4331 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4332 return 0; 4333 /* 4334 * scope_id check. if sin6_scope_id is 0, we regard it 4335 * as a wildcard scope, which matches any scope zone ID. 4336 */ 4337 if (spidx0->src.sin6.sin6_scope_id && 4338 spidx1->src.sin6.sin6_scope_id && 4339 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4340 return 0; 4341 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4342 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4343 return 0; 4344 break; 4345 default: 4346 /* XXX */ 4347 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4348 return 0; 4349 break; 4350 } 4351 4352 /* XXX Do we check other field ? e.g. flowinfo */ 4353 4354 return 1; 4355 } 4356 4357 /* returns 0 on match */ 4358 static int 4359 key_sockaddrcmp( 4360 const struct sockaddr *sa1, 4361 const struct sockaddr *sa2, 4362 int port) 4363 { 4364 #ifdef satosin 4365 #undef satosin 4366 #endif 4367 #define satosin(s) ((const struct sockaddr_in *)s) 4368 #ifdef satosin6 4369 #undef satosin6 4370 #endif 4371 #define satosin6(s) ((const struct sockaddr_in6 *)s) 4372 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4373 return 1; 4374 4375 switch (sa1->sa_family) { 4376 case AF_INET: 4377 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4378 return 1; 4379 if (satosin(sa1)->sin_addr.s_addr != 4380 satosin(sa2)->sin_addr.s_addr) { 4381 return 1; 4382 } 4383 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4384 return 1; 4385 break; 4386 case AF_INET6: 4387 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4388 return 1; /*EINVAL*/ 4389 if (satosin6(sa1)->sin6_scope_id != 4390 satosin6(sa2)->sin6_scope_id) { 4391 return 1; 4392 } 4393 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4394 &satosin6(sa2)->sin6_addr)) { 4395 return 1; 4396 } 4397 if (port && 4398 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4399 return 1; 4400 } 4401 break; 4402 default: 4403 if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4404 return 1; 4405 break; 4406 } 4407 4408 return 0; 4409 #undef satosin 4410 #undef satosin6 4411 } 4412 4413 /* 4414 * compare two buffers with mask. 4415 * IN: 4416 * addr1: source 4417 * addr2: object 4418 * bits: Number of bits to compare 4419 * OUT: 4420 * 1 : equal 4421 * 0 : not equal 4422 */ 4423 static int 4424 key_bbcmp(const void *a1, const void *a2, u_int bits) 4425 { 4426 const unsigned char *p1 = a1; 4427 const unsigned char *p2 = a2; 4428 4429 /* XXX: This could be considerably faster if we compare a word 4430 * at a time, but it is complicated on LSB Endian machines */ 4431 4432 /* Handle null pointers */ 4433 if (p1 == NULL || p2 == NULL) 4434 return (p1 == p2); 4435 4436 while (bits >= 8) { 4437 if (*p1++ != *p2++) 4438 return 0; 4439 bits -= 8; 4440 } 4441 4442 if (bits > 0) { 4443 u_int8_t mask = ~((1<<(8-bits))-1); 4444 if ((*p1 & mask) != (*p2 & mask)) 4445 return 0; 4446 } 4447 return 1; /* Match! */ 4448 } 4449 4450 /* 4451 * time handler. 4452 * scanning SPD and SAD to check status for each entries, 4453 * and do to remove or to expire. 4454 * XXX2038: year 2038 problem may remain. 4455 */ 4456 void 4457 key_timehandler(void* arg) 4458 { 4459 u_int dir; 4460 int s; 4461 time_t now = time_second; 4462 4463 s = splsoftnet(); /*called from softclock()*/ 4464 mutex_enter(softnet_lock); 4465 4466 /* SPD */ 4467 { 4468 struct secpolicy *sp, *nextsp; 4469 4470 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4471 for (sp = LIST_FIRST(&sptree[dir]); 4472 sp != NULL; 4473 sp = nextsp) { 4474 4475 nextsp = LIST_NEXT(sp, chain); 4476 4477 if (sp->state == IPSEC_SPSTATE_DEAD) { 4478 key_sp_unlink(sp); /*XXX*/ 4479 4480 /* 'sp' dead; continue transfers to 4481 * 'sp = nextsp' 4482 */ 4483 continue; 4484 } 4485 4486 if (sp->lifetime == 0 && sp->validtime == 0) 4487 continue; 4488 4489 /* the deletion will occur next time */ 4490 if ((sp->lifetime && now - sp->created > sp->lifetime) 4491 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4492 key_sp_dead(sp); 4493 key_spdexpire(sp); 4494 continue; 4495 } 4496 } 4497 } 4498 } 4499 4500 /* SAD */ 4501 { 4502 struct secashead *sah, *nextsah; 4503 struct secasvar *sav, *nextsav; 4504 4505 for (sah = LIST_FIRST(&sahtree); 4506 sah != NULL; 4507 sah = nextsah) { 4508 4509 nextsah = LIST_NEXT(sah, chain); 4510 4511 /* if sah has been dead, then delete it and process next sah. */ 4512 if (sah->state == SADB_SASTATE_DEAD) { 4513 key_delsah(sah); 4514 continue; 4515 } 4516 4517 /* if LARVAL entry doesn't become MATURE, delete it. */ 4518 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4519 sav != NULL; 4520 sav = nextsav) { 4521 4522 nextsav = LIST_NEXT(sav, chain); 4523 4524 if (now - sav->created > key_larval_lifetime) { 4525 KEY_FREESAV(&sav); 4526 } 4527 } 4528 4529 /* 4530 * check MATURE entry to start to send expire message 4531 * whether or not. 4532 */ 4533 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4534 sav != NULL; 4535 sav = nextsav) { 4536 4537 nextsav = LIST_NEXT(sav, chain); 4538 4539 /* we don't need to check. */ 4540 if (sav->lft_s == NULL) 4541 continue; 4542 4543 /* sanity check */ 4544 if (sav->lft_c == NULL) { 4545 ipseclog((LOG_DEBUG,"key_timehandler: " 4546 "There is no CURRENT time, why?\n")); 4547 continue; 4548 } 4549 4550 /* check SOFT lifetime */ 4551 if (sav->lft_s->sadb_lifetime_addtime != 0 4552 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4553 /* 4554 * check SA to be used whether or not. 4555 * when SA hasn't been used, delete it. 4556 */ 4557 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4558 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4559 KEY_FREESAV(&sav); 4560 } else { 4561 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4562 /* 4563 * XXX If we keep to send expire 4564 * message in the status of 4565 * DYING. Do remove below code. 4566 */ 4567 key_expire(sav); 4568 } 4569 } 4570 /* check SOFT lifetime by bytes */ 4571 /* 4572 * XXX I don't know the way to delete this SA 4573 * when new SA is installed. Caution when it's 4574 * installed too big lifetime by time. 4575 */ 4576 else if (sav->lft_s->sadb_lifetime_bytes != 0 4577 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4578 4579 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4580 /* 4581 * XXX If we keep to send expire 4582 * message in the status of 4583 * DYING. Do remove below code. 4584 */ 4585 key_expire(sav); 4586 } 4587 } 4588 4589 /* check DYING entry to change status to DEAD. */ 4590 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4591 sav != NULL; 4592 sav = nextsav) { 4593 4594 nextsav = LIST_NEXT(sav, chain); 4595 4596 /* we don't need to check. */ 4597 if (sav->lft_h == NULL) 4598 continue; 4599 4600 /* sanity check */ 4601 if (sav->lft_c == NULL) { 4602 ipseclog((LOG_DEBUG, "key_timehandler: " 4603 "There is no CURRENT time, why?\n")); 4604 continue; 4605 } 4606 4607 if (sav->lft_h->sadb_lifetime_addtime != 0 4608 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4609 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4610 KEY_FREESAV(&sav); 4611 } 4612 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4613 else if (sav->lft_s != NULL 4614 && sav->lft_s->sadb_lifetime_addtime != 0 4615 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4616 /* 4617 * XXX: should be checked to be 4618 * installed the valid SA. 4619 */ 4620 4621 /* 4622 * If there is no SA then sending 4623 * expire message. 4624 */ 4625 key_expire(sav); 4626 } 4627 #endif 4628 /* check HARD lifetime by bytes */ 4629 else if (sav->lft_h->sadb_lifetime_bytes != 0 4630 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4631 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4632 KEY_FREESAV(&sav); 4633 } 4634 } 4635 4636 /* delete entry in DEAD */ 4637 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4638 sav != NULL; 4639 sav = nextsav) { 4640 4641 nextsav = LIST_NEXT(sav, chain); 4642 4643 /* sanity check */ 4644 if (sav->state != SADB_SASTATE_DEAD) { 4645 ipseclog((LOG_DEBUG, "key_timehandler: " 4646 "invalid sav->state " 4647 "(queue: %d SA: %d): " 4648 "kill it anyway\n", 4649 SADB_SASTATE_DEAD, sav->state)); 4650 } 4651 4652 /* 4653 * do not call key_freesav() here. 4654 * sav should already be freed, and sav->refcnt 4655 * shows other references to sav 4656 * (such as from SPD). 4657 */ 4658 } 4659 } 4660 } 4661 4662 #ifndef IPSEC_NONBLOCK_ACQUIRE 4663 /* ACQ tree */ 4664 { 4665 struct secacq *acq, *nextacq; 4666 4667 for (acq = LIST_FIRST(&acqtree); 4668 acq != NULL; 4669 acq = nextacq) { 4670 4671 nextacq = LIST_NEXT(acq, chain); 4672 4673 if (now - acq->created > key_blockacq_lifetime 4674 && __LIST_CHAINED(acq)) { 4675 LIST_REMOVE(acq, chain); 4676 KFREE(acq); 4677 } 4678 } 4679 } 4680 #endif 4681 4682 /* SP ACQ tree */ 4683 { 4684 struct secspacq *acq, *nextacq; 4685 4686 for (acq = LIST_FIRST(&spacqtree); 4687 acq != NULL; 4688 acq = nextacq) { 4689 4690 nextacq = LIST_NEXT(acq, chain); 4691 4692 if (now - acq->created > key_blockacq_lifetime 4693 && __LIST_CHAINED(acq)) { 4694 LIST_REMOVE(acq, chain); 4695 KFREE(acq); 4696 } 4697 } 4698 } 4699 4700 /* initialize random seed */ 4701 if (key_tick_init_random++ > key_int_random) { 4702 key_tick_init_random = 0; 4703 key_srandom(); 4704 } 4705 4706 #ifndef IPSEC_DEBUG2 4707 /* do exchange to tick time !! */ 4708 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4709 #endif /* IPSEC_DEBUG2 */ 4710 4711 mutex_exit(softnet_lock); 4712 splx(s); 4713 return; 4714 } 4715 4716 #ifdef __NetBSD__ 4717 void srandom(int); 4718 void srandom(int arg) {return;} 4719 #endif 4720 4721 /* 4722 * to initialize a seed for random() 4723 */ 4724 static void 4725 key_srandom() 4726 { 4727 srandom(time_second); 4728 } 4729 4730 u_long 4731 key_random() 4732 { 4733 u_long value; 4734 4735 key_randomfill(&value, sizeof(value)); 4736 return value; 4737 } 4738 4739 void 4740 key_randomfill(void *p, size_t l) 4741 { 4742 size_t n; 4743 u_long v; 4744 static int warn = 1; 4745 4746 n = 0; 4747 n = (size_t)read_random(p, (u_int)l); 4748 /* last resort */ 4749 while (n < l) { 4750 v = random(); 4751 memcpy((u_int8_t *)p + n, &v, 4752 l - n < sizeof(v) ? l - n : sizeof(v)); 4753 n += sizeof(v); 4754 4755 if (warn) { 4756 printf("WARNING: pseudo-random number generator " 4757 "used for IPsec processing\n"); 4758 warn = 0; 4759 } 4760 } 4761 } 4762 4763 /* 4764 * map SADB_SATYPE_* to IPPROTO_*. 4765 * if satype == SADB_SATYPE then satype is mapped to ~0. 4766 * OUT: 4767 * 0: invalid satype. 4768 */ 4769 static u_int16_t 4770 key_satype2proto(u_int8_t satype) 4771 { 4772 switch (satype) { 4773 case SADB_SATYPE_UNSPEC: 4774 return IPSEC_PROTO_ANY; 4775 case SADB_SATYPE_AH: 4776 return IPPROTO_AH; 4777 case SADB_SATYPE_ESP: 4778 return IPPROTO_ESP; 4779 case SADB_X_SATYPE_IPCOMP: 4780 return IPPROTO_IPCOMP; 4781 case SADB_X_SATYPE_TCPSIGNATURE: 4782 return IPPROTO_TCP; 4783 default: 4784 return 0; 4785 } 4786 /* NOTREACHED */ 4787 } 4788 4789 /* 4790 * map IPPROTO_* to SADB_SATYPE_* 4791 * OUT: 4792 * 0: invalid protocol type. 4793 */ 4794 static u_int8_t 4795 key_proto2satype(u_int16_t proto) 4796 { 4797 switch (proto) { 4798 case IPPROTO_AH: 4799 return SADB_SATYPE_AH; 4800 case IPPROTO_ESP: 4801 return SADB_SATYPE_ESP; 4802 case IPPROTO_IPCOMP: 4803 return SADB_X_SATYPE_IPCOMP; 4804 case IPPROTO_TCP: 4805 return SADB_X_SATYPE_TCPSIGNATURE; 4806 default: 4807 return 0; 4808 } 4809 /* NOTREACHED */ 4810 } 4811 4812 static int 4813 key_setsecasidx(int proto, int mode, int reqid, 4814 const struct sadb_address * src, 4815 const struct sadb_address * dst, 4816 struct secasindex * saidx) 4817 { 4818 const union sockaddr_union * src_u = 4819 (const union sockaddr_union *) src; 4820 const union sockaddr_union * dst_u = 4821 (const union sockaddr_union *) dst; 4822 4823 /* sa len safety check */ 4824 if (key_checksalen(src_u) != 0) 4825 return -1; 4826 if (key_checksalen(dst_u) != 0) 4827 return -1; 4828 4829 memset(saidx, 0, sizeof(*saidx)); 4830 saidx->proto = proto; 4831 saidx->mode = mode; 4832 saidx->reqid = reqid; 4833 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4834 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4835 4836 #ifndef IPSEC_NAT_T 4837 key_porttosaddr(&((saidx)->src),0); 4838 key_porttosaddr(&((saidx)->dst),0); 4839 #endif 4840 return 0; 4841 } 4842 4843 /* %%% PF_KEY */ 4844 /* 4845 * SADB_GETSPI processing is to receive 4846 * <base, (SA2), src address, dst address, (SPI range)> 4847 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4848 * tree with the status of LARVAL, and send 4849 * <base, SA(*), address(SD)> 4850 * to the IKMPd. 4851 * 4852 * IN: mhp: pointer to the pointer to each header. 4853 * OUT: NULL if fail. 4854 * other if success, return pointer to the message to send. 4855 */ 4856 static int 4857 key_getspi(struct socket *so, struct mbuf *m, 4858 const struct sadb_msghdr *mhp) 4859 { 4860 struct sadb_address *src0, *dst0; 4861 struct secasindex saidx; 4862 struct secashead *newsah; 4863 struct secasvar *newsav; 4864 u_int8_t proto; 4865 u_int32_t spi; 4866 u_int8_t mode; 4867 u_int16_t reqid; 4868 int error; 4869 4870 /* sanity check */ 4871 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4872 panic("key_getspi: NULL pointer is passed"); 4873 4874 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4875 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4876 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4877 return key_senderror(so, m, EINVAL); 4878 } 4879 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4880 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4881 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4882 return key_senderror(so, m, EINVAL); 4883 } 4884 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4885 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4886 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4887 } else { 4888 mode = IPSEC_MODE_ANY; 4889 reqid = 0; 4890 } 4891 4892 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4893 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4894 4895 /* map satype to proto */ 4896 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4897 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4898 return key_senderror(so, m, EINVAL); 4899 } 4900 4901 4902 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 4903 dst0 + 1, &saidx)) != 0) 4904 return key_senderror(so, m, EINVAL); 4905 4906 /* SPI allocation */ 4907 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4908 &saidx); 4909 if (spi == 0) 4910 return key_senderror(so, m, EINVAL); 4911 4912 /* get a SA index */ 4913 if ((newsah = key_getsah(&saidx)) == NULL) { 4914 /* create a new SA index */ 4915 if ((newsah = key_newsah(&saidx)) == NULL) { 4916 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4917 return key_senderror(so, m, ENOBUFS); 4918 } 4919 } 4920 4921 /* get a new SA */ 4922 /* XXX rewrite */ 4923 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4924 if (newsav == NULL) { 4925 /* XXX don't free new SA index allocated in above. */ 4926 return key_senderror(so, m, error); 4927 } 4928 4929 /* set spi */ 4930 newsav->spi = htonl(spi); 4931 4932 #ifndef IPSEC_NONBLOCK_ACQUIRE 4933 /* delete the entry in acqtree */ 4934 if (mhp->msg->sadb_msg_seq != 0) { 4935 struct secacq *acq; 4936 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4937 /* reset counter in order to deletion by timehandler. */ 4938 acq->created = time_second; 4939 acq->count = 0; 4940 } 4941 } 4942 #endif 4943 4944 { 4945 struct mbuf *n, *nn; 4946 struct sadb_sa *m_sa; 4947 struct sadb_msg *newmsg; 4948 int off, len; 4949 4950 /* create new sadb_msg to reply. */ 4951 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4952 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4953 if (len > MCLBYTES) 4954 return key_senderror(so, m, ENOBUFS); 4955 4956 MGETHDR(n, M_DONTWAIT, MT_DATA); 4957 if (len > MHLEN) { 4958 MCLGET(n, M_DONTWAIT); 4959 if ((n->m_flags & M_EXT) == 0) { 4960 m_freem(n); 4961 n = NULL; 4962 } 4963 } 4964 if (!n) 4965 return key_senderror(so, m, ENOBUFS); 4966 4967 n->m_len = len; 4968 n->m_next = NULL; 4969 off = 0; 4970 4971 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4972 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4973 4974 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4975 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4976 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4977 m_sa->sadb_sa_spi = htonl(spi); 4978 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4979 4980 #ifdef DIAGNOSTIC 4981 if (off != len) 4982 panic("length inconsistency in key_getspi"); 4983 #endif 4984 4985 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4986 SADB_EXT_ADDRESS_DST); 4987 if (!n->m_next) { 4988 m_freem(n); 4989 return key_senderror(so, m, ENOBUFS); 4990 } 4991 4992 if (n->m_len < sizeof(struct sadb_msg)) { 4993 n = m_pullup(n, sizeof(struct sadb_msg)); 4994 if (n == NULL) 4995 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4996 } 4997 4998 n->m_pkthdr.len = 0; 4999 for (nn = n; nn; nn = nn->m_next) 5000 n->m_pkthdr.len += nn->m_len; 5001 5002 newmsg = mtod(n, struct sadb_msg *); 5003 newmsg->sadb_msg_seq = newsav->seq; 5004 newmsg->sadb_msg_errno = 0; 5005 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5006 5007 m_freem(m); 5008 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5009 } 5010 } 5011 5012 /* 5013 * allocating new SPI 5014 * called by key_getspi(). 5015 * OUT: 5016 * 0: failure. 5017 * others: success. 5018 */ 5019 static u_int32_t 5020 key_do_getnewspi(struct sadb_spirange *spirange, 5021 struct secasindex *saidx) 5022 { 5023 u_int32_t newspi; 5024 u_int32_t spmin, spmax; 5025 int count = key_spi_trycnt; 5026 5027 /* set spi range to allocate */ 5028 if (spirange != NULL) { 5029 spmin = spirange->sadb_spirange_min; 5030 spmax = spirange->sadb_spirange_max; 5031 } else { 5032 spmin = key_spi_minval; 5033 spmax = key_spi_maxval; 5034 } 5035 /* IPCOMP needs 2-byte SPI */ 5036 if (saidx->proto == IPPROTO_IPCOMP) { 5037 u_int32_t t; 5038 if (spmin >= 0x10000) 5039 spmin = 0xffff; 5040 if (spmax >= 0x10000) 5041 spmax = 0xffff; 5042 if (spmin > spmax) { 5043 t = spmin; spmin = spmax; spmax = t; 5044 } 5045 } 5046 5047 if (spmin == spmax) { 5048 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5049 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 5050 return 0; 5051 } 5052 5053 count--; /* taking one cost. */ 5054 newspi = spmin; 5055 5056 } else { 5057 5058 /* init SPI */ 5059 newspi = 0; 5060 5061 /* when requesting to allocate spi ranged */ 5062 while (count--) { 5063 /* generate pseudo-random SPI value ranged. */ 5064 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5065 5066 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5067 break; 5068 } 5069 5070 if (count == 0 || newspi == 0) { 5071 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 5072 return 0; 5073 } 5074 } 5075 5076 /* statistics */ 5077 keystat.getspi_count = 5078 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5079 5080 return newspi; 5081 } 5082 5083 #ifdef IPSEC_NAT_T 5084 /* Handle IPSEC_NAT_T info if present */ 5085 static int 5086 key_handle_natt_info(struct secasvar *sav, 5087 const struct sadb_msghdr *mhp) 5088 { 5089 5090 if (mhp->ext[SADB_X_EXT_NAT_T_OA] != NULL) 5091 printf("update: NAT-T OA present\n"); 5092 5093 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5094 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5095 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5096 struct sadb_x_nat_t_type *type; 5097 struct sadb_x_nat_t_port *sport; 5098 struct sadb_x_nat_t_port *dport; 5099 struct sadb_address *addr; 5100 struct sadb_x_nat_t_frag *frag; 5101 5102 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5103 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5104 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5105 ipseclog((LOG_DEBUG, "key_update: " 5106 "invalid message.\n")); 5107 return -1; 5108 } 5109 5110 if ((mhp->ext[SADB_X_EXT_NAT_T_OA] != NULL) && 5111 (mhp->extlen[SADB_X_EXT_NAT_T_OA] < sizeof(*addr))) { 5112 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5113 return -1; 5114 } 5115 5116 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 5117 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 5118 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5119 return -1; 5120 } 5121 5122 type = (struct sadb_x_nat_t_type *) 5123 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5124 sport = (struct sadb_x_nat_t_port *) 5125 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5126 dport = (struct sadb_x_nat_t_port *) 5127 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5128 addr = (struct sadb_address *) 5129 mhp->ext[SADB_X_EXT_NAT_T_OA]; 5130 frag = (struct sadb_x_nat_t_frag *) 5131 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5132 5133 if (type) 5134 sav->natt_type = type->sadb_x_nat_t_type_type; 5135 if (sport) 5136 key_porttosaddr(&sav->sah->saidx.src, 5137 sport->sadb_x_nat_t_port_port); 5138 if (dport) 5139 key_porttosaddr(&sav->sah->saidx.dst, 5140 dport->sadb_x_nat_t_port_port); 5141 if (frag) 5142 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5143 else 5144 sav->esp_frag = IP_MAXPACKET; 5145 } 5146 5147 return 0; 5148 } 5149 #endif 5150 5151 5152 /* 5153 * SADB_UPDATE processing 5154 * receive 5155 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5156 * key(AE), (identity(SD),) (sensitivity)> 5157 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5158 * and send 5159 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5160 * (identity(SD),) (sensitivity)> 5161 * to the ikmpd. 5162 * 5163 * m will always be freed. 5164 */ 5165 static int 5166 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5167 { 5168 struct sadb_sa *sa0; 5169 struct sadb_address *src0, *dst0; 5170 struct secasindex saidx; 5171 struct secashead *sah; 5172 struct secasvar *sav; 5173 u_int16_t proto; 5174 u_int8_t mode; 5175 u_int16_t reqid; 5176 int error; 5177 5178 /* sanity check */ 5179 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5180 panic("key_update: NULL pointer is passed"); 5181 5182 /* map satype to proto */ 5183 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5184 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 5185 return key_senderror(so, m, EINVAL); 5186 } 5187 5188 if (mhp->ext[SADB_EXT_SA] == NULL || 5189 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5190 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5191 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5192 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5193 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5194 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5195 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5196 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5197 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5198 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5199 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5200 return key_senderror(so, m, EINVAL); 5201 } 5202 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5203 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5204 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5205 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5206 return key_senderror(so, m, EINVAL); 5207 } 5208 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5209 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5210 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5211 } else { 5212 mode = IPSEC_MODE_ANY; 5213 reqid = 0; 5214 } 5215 /* XXX boundary checking for other extensions */ 5216 5217 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5218 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5219 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5220 5221 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5222 dst0 + 1, &saidx)) != 0) 5223 return key_senderror(so, m, EINVAL); 5224 5225 5226 /* get a SA header */ 5227 if ((sah = key_getsah(&saidx)) == NULL) { 5228 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 5229 return key_senderror(so, m, ENOENT); 5230 } 5231 5232 /* set spidx if there */ 5233 /* XXX rewrite */ 5234 error = key_setident(sah, m, mhp); 5235 if (error) 5236 return key_senderror(so, m, error); 5237 5238 /* find a SA with sequence number. */ 5239 #ifdef IPSEC_DOSEQCHECK 5240 if (mhp->msg->sadb_msg_seq != 0 5241 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5242 ipseclog((LOG_DEBUG, 5243 "key_update: no larval SA with sequence %u exists.\n", 5244 mhp->msg->sadb_msg_seq)); 5245 return key_senderror(so, m, ENOENT); 5246 } 5247 #else 5248 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 5249 ipseclog((LOG_DEBUG, 5250 "key_update: no such a SA found (spi:%u)\n", 5251 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5252 return key_senderror(so, m, EINVAL); 5253 } 5254 #endif 5255 5256 /* validity check */ 5257 if (sav->sah->saidx.proto != proto) { 5258 ipseclog((LOG_DEBUG, 5259 "key_update: protocol mismatched (DB=%u param=%u)\n", 5260 sav->sah->saidx.proto, proto)); 5261 return key_senderror(so, m, EINVAL); 5262 } 5263 #ifdef IPSEC_DOSEQCHECK 5264 if (sav->spi != sa0->sadb_sa_spi) { 5265 ipseclog((LOG_DEBUG, 5266 "key_update: SPI mismatched (DB:%u param:%u)\n", 5267 (u_int32_t)ntohl(sav->spi), 5268 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5269 return key_senderror(so, m, EINVAL); 5270 } 5271 #endif 5272 if (sav->pid != mhp->msg->sadb_msg_pid) { 5273 ipseclog((LOG_DEBUG, 5274 "key_update: pid mismatched (DB:%u param:%u)\n", 5275 sav->pid, mhp->msg->sadb_msg_pid)); 5276 return key_senderror(so, m, EINVAL); 5277 } 5278 5279 /* copy sav values */ 5280 error = key_setsaval(sav, m, mhp); 5281 if (error) { 5282 KEY_FREESAV(&sav); 5283 return key_senderror(so, m, error); 5284 } 5285 5286 /* check SA values to be mature. */ 5287 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5288 KEY_FREESAV(&sav); 5289 return key_senderror(so, m, 0); 5290 } 5291 5292 #ifdef IPSEC_NAT_T 5293 if ((error = key_handle_natt_info(sav,mhp)) != 0) 5294 return key_senderror(so, m, EINVAL); 5295 #endif /* IPSEC_NAT_T */ 5296 5297 { 5298 struct mbuf *n; 5299 5300 /* set msg buf from mhp */ 5301 n = key_getmsgbuf_x1(m, mhp); 5302 if (n == NULL) { 5303 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5304 return key_senderror(so, m, ENOBUFS); 5305 } 5306 5307 m_freem(m); 5308 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5309 } 5310 } 5311 5312 /* 5313 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5314 * only called by key_update(). 5315 * OUT: 5316 * NULL : not found 5317 * others : found, pointer to a SA. 5318 */ 5319 #ifdef IPSEC_DOSEQCHECK 5320 static struct secasvar * 5321 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5322 { 5323 struct secasvar *sav; 5324 u_int state; 5325 5326 state = SADB_SASTATE_LARVAL; 5327 5328 /* search SAD with sequence number ? */ 5329 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5330 5331 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5332 5333 if (sav->seq == seq) { 5334 SA_ADDREF(sav); 5335 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5336 printf("DP key_getsavbyseq cause " 5337 "refcnt++:%d SA:%p\n", 5338 sav->refcnt, sav)); 5339 return sav; 5340 } 5341 } 5342 5343 return NULL; 5344 } 5345 #endif 5346 5347 /* 5348 * SADB_ADD processing 5349 * add an entry to SA database, when received 5350 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5351 * key(AE), (identity(SD),) (sensitivity)> 5352 * from the ikmpd, 5353 * and send 5354 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5355 * (identity(SD),) (sensitivity)> 5356 * to the ikmpd. 5357 * 5358 * IGNORE identity and sensitivity messages. 5359 * 5360 * m will always be freed. 5361 */ 5362 static int 5363 key_add(struct socket *so, struct mbuf *m, 5364 const struct sadb_msghdr *mhp) 5365 { 5366 struct sadb_sa *sa0; 5367 struct sadb_address *src0, *dst0; 5368 struct secasindex saidx; 5369 struct secashead *newsah; 5370 struct secasvar *newsav; 5371 u_int16_t proto; 5372 u_int8_t mode; 5373 u_int16_t reqid; 5374 int error; 5375 5376 /* sanity check */ 5377 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5378 panic("key_add: NULL pointer is passed"); 5379 5380 /* map satype to proto */ 5381 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5382 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5383 return key_senderror(so, m, EINVAL); 5384 } 5385 5386 if (mhp->ext[SADB_EXT_SA] == NULL || 5387 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5388 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5389 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5390 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5391 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5392 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5393 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5394 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5395 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5396 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5397 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5398 return key_senderror(so, m, EINVAL); 5399 } 5400 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5401 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5402 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5403 /* XXX need more */ 5404 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5405 return key_senderror(so, m, EINVAL); 5406 } 5407 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5408 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5409 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5410 } else { 5411 mode = IPSEC_MODE_ANY; 5412 reqid = 0; 5413 } 5414 5415 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5416 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5417 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5418 5419 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5420 dst0 + 1, &saidx)) != 0) 5421 return key_senderror(so, m, EINVAL); 5422 5423 /* get a SA header */ 5424 if ((newsah = key_getsah(&saidx)) == NULL) { 5425 /* create a new SA header */ 5426 if ((newsah = key_newsah(&saidx)) == NULL) { 5427 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5428 return key_senderror(so, m, ENOBUFS); 5429 } 5430 } 5431 5432 /* set spidx if there */ 5433 /* XXX rewrite */ 5434 error = key_setident(newsah, m, mhp); 5435 if (error) { 5436 return key_senderror(so, m, error); 5437 } 5438 5439 /* create new SA entry. */ 5440 /* We can create new SA only if SPI is differenct. */ 5441 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5442 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5443 return key_senderror(so, m, EEXIST); 5444 } 5445 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5446 if (newsav == NULL) { 5447 return key_senderror(so, m, error); 5448 } 5449 5450 /* check SA values to be mature. */ 5451 if ((error = key_mature(newsav)) != 0) { 5452 KEY_FREESAV(&newsav); 5453 return key_senderror(so, m, error); 5454 } 5455 5456 #ifdef IPSEC_NAT_T 5457 if ((error = key_handle_natt_info(newsav, mhp)) != 0) 5458 return key_senderror(so, m, EINVAL); 5459 #endif /* IPSEC_NAT_T */ 5460 5461 /* 5462 * don't call key_freesav() here, as we would like to keep the SA 5463 * in the database on success. 5464 */ 5465 5466 { 5467 struct mbuf *n; 5468 5469 /* set msg buf from mhp */ 5470 n = key_getmsgbuf_x1(m, mhp); 5471 if (n == NULL) { 5472 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5473 return key_senderror(so, m, ENOBUFS); 5474 } 5475 5476 m_freem(m); 5477 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5478 } 5479 } 5480 5481 /* m is retained */ 5482 static int 5483 key_setident(struct secashead *sah, struct mbuf *m, 5484 const struct sadb_msghdr *mhp) 5485 { 5486 const struct sadb_ident *idsrc, *iddst; 5487 int idsrclen, iddstlen; 5488 5489 /* sanity check */ 5490 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5491 panic("key_setident: NULL pointer is passed"); 5492 5493 /* don't make buffer if not there */ 5494 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5495 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5496 sah->idents = NULL; 5497 sah->identd = NULL; 5498 return 0; 5499 } 5500 5501 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5502 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5503 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5504 return EINVAL; 5505 } 5506 5507 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5508 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5509 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5510 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5511 5512 /* validity check */ 5513 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5514 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5515 return EINVAL; 5516 } 5517 5518 switch (idsrc->sadb_ident_type) { 5519 case SADB_IDENTTYPE_PREFIX: 5520 case SADB_IDENTTYPE_FQDN: 5521 case SADB_IDENTTYPE_USERFQDN: 5522 default: 5523 /* XXX do nothing */ 5524 sah->idents = NULL; 5525 sah->identd = NULL; 5526 return 0; 5527 } 5528 5529 /* make structure */ 5530 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5531 if (sah->idents == NULL) { 5532 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5533 return ENOBUFS; 5534 } 5535 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5536 if (sah->identd == NULL) { 5537 KFREE(sah->idents); 5538 sah->idents = NULL; 5539 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5540 return ENOBUFS; 5541 } 5542 memcpy(sah->idents, idsrc, idsrclen); 5543 memcpy(sah->identd, iddst, iddstlen); 5544 5545 return 0; 5546 } 5547 5548 /* 5549 * m will not be freed on return. 5550 * it is caller's responsibility to free the result. 5551 */ 5552 static struct mbuf * 5553 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5554 { 5555 struct mbuf *n; 5556 5557 /* sanity check */ 5558 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5559 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5560 5561 /* create new sadb_msg to reply. */ 5562 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5563 SADB_EXT_SA, SADB_X_EXT_SA2, 5564 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5565 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5566 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5567 if (!n) 5568 return NULL; 5569 5570 if (n->m_len < sizeof(struct sadb_msg)) { 5571 n = m_pullup(n, sizeof(struct sadb_msg)); 5572 if (n == NULL) 5573 return NULL; 5574 } 5575 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5576 mtod(n, struct sadb_msg *)->sadb_msg_len = 5577 PFKEY_UNIT64(n->m_pkthdr.len); 5578 5579 return n; 5580 } 5581 5582 static int key_delete_all (struct socket *, struct mbuf *, 5583 const struct sadb_msghdr *, u_int16_t); 5584 5585 /* 5586 * SADB_DELETE processing 5587 * receive 5588 * <base, SA(*), address(SD)> 5589 * from the ikmpd, and set SADB_SASTATE_DEAD, 5590 * and send, 5591 * <base, SA(*), address(SD)> 5592 * to the ikmpd. 5593 * 5594 * m will always be freed. 5595 */ 5596 static int 5597 key_delete(struct socket *so, struct mbuf *m, 5598 const struct sadb_msghdr *mhp) 5599 { 5600 struct sadb_sa *sa0; 5601 struct sadb_address *src0, *dst0; 5602 struct secasindex saidx; 5603 struct secashead *sah; 5604 struct secasvar *sav = NULL; 5605 u_int16_t proto; 5606 int error; 5607 5608 /* sanity check */ 5609 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5610 panic("key_delete: NULL pointer is passed"); 5611 5612 /* map satype to proto */ 5613 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5614 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5615 return key_senderror(so, m, EINVAL); 5616 } 5617 5618 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5619 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5620 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5621 return key_senderror(so, m, EINVAL); 5622 } 5623 5624 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5625 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5626 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5627 return key_senderror(so, m, EINVAL); 5628 } 5629 5630 if (mhp->ext[SADB_EXT_SA] == NULL) { 5631 /* 5632 * Caller wants us to delete all non-LARVAL SAs 5633 * that match the src/dst. This is used during 5634 * IKE INITIAL-CONTACT. 5635 */ 5636 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5637 return key_delete_all(so, m, mhp, proto); 5638 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5639 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5640 return key_senderror(so, m, EINVAL); 5641 } 5642 5643 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5644 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5645 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5646 5647 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5648 dst0 + 1, &saidx)) != 0) 5649 return key_senderror(so, m, EINVAL); 5650 5651 /* get a SA header */ 5652 LIST_FOREACH(sah, &sahtree, chain) { 5653 if (sah->state == SADB_SASTATE_DEAD) 5654 continue; 5655 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5656 continue; 5657 5658 /* get a SA with SPI. */ 5659 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5660 if (sav) 5661 break; 5662 } 5663 if (sah == NULL) { 5664 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5665 return key_senderror(so, m, ENOENT); 5666 } 5667 5668 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5669 KEY_FREESAV(&sav); 5670 5671 { 5672 struct mbuf *n; 5673 struct sadb_msg *newmsg; 5674 5675 /* create new sadb_msg to reply. */ 5676 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5677 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5678 if (!n) 5679 return key_senderror(so, m, ENOBUFS); 5680 5681 if (n->m_len < sizeof(struct sadb_msg)) { 5682 n = m_pullup(n, sizeof(struct sadb_msg)); 5683 if (n == NULL) 5684 return key_senderror(so, m, ENOBUFS); 5685 } 5686 newmsg = mtod(n, struct sadb_msg *); 5687 newmsg->sadb_msg_errno = 0; 5688 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5689 5690 m_freem(m); 5691 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5692 } 5693 } 5694 5695 /* 5696 * delete all SAs for src/dst. Called from key_delete(). 5697 */ 5698 static int 5699 key_delete_all(struct socket *so, struct mbuf *m, 5700 const struct sadb_msghdr *mhp, u_int16_t proto) 5701 { 5702 struct sadb_address *src0, *dst0; 5703 struct secasindex saidx; 5704 struct secashead *sah; 5705 struct secasvar *sav, *nextsav; 5706 u_int stateidx, state; 5707 int error; 5708 5709 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5710 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5711 5712 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5713 dst0 + 1, &saidx)) != 0) 5714 return key_senderror(so, m, EINVAL); 5715 5716 LIST_FOREACH(sah, &sahtree, chain) { 5717 if (sah->state == SADB_SASTATE_DEAD) 5718 continue; 5719 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5720 continue; 5721 5722 /* Delete all non-LARVAL SAs. */ 5723 for (stateidx = 0; 5724 stateidx < _ARRAYLEN(saorder_state_alive); 5725 stateidx++) { 5726 state = saorder_state_alive[stateidx]; 5727 if (state == SADB_SASTATE_LARVAL) 5728 continue; 5729 for (sav = LIST_FIRST(&sah->savtree[state]); 5730 sav != NULL; sav = nextsav) { 5731 nextsav = LIST_NEXT(sav, chain); 5732 /* sanity check */ 5733 if (sav->state != state) { 5734 ipseclog((LOG_DEBUG, "key_delete_all: " 5735 "invalid sav->state " 5736 "(queue: %d SA: %d)\n", 5737 state, sav->state)); 5738 continue; 5739 } 5740 5741 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5742 KEY_FREESAV(&sav); 5743 } 5744 } 5745 } 5746 { 5747 struct mbuf *n; 5748 struct sadb_msg *newmsg; 5749 5750 /* create new sadb_msg to reply. */ 5751 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5752 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5753 if (!n) 5754 return key_senderror(so, m, ENOBUFS); 5755 5756 if (n->m_len < sizeof(struct sadb_msg)) { 5757 n = m_pullup(n, sizeof(struct sadb_msg)); 5758 if (n == NULL) 5759 return key_senderror(so, m, ENOBUFS); 5760 } 5761 newmsg = mtod(n, struct sadb_msg *); 5762 newmsg->sadb_msg_errno = 0; 5763 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5764 5765 m_freem(m); 5766 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5767 } 5768 } 5769 5770 /* 5771 * SADB_GET processing 5772 * receive 5773 * <base, SA(*), address(SD)> 5774 * from the ikmpd, and get a SP and a SA to respond, 5775 * and send, 5776 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5777 * (identity(SD),) (sensitivity)> 5778 * to the ikmpd. 5779 * 5780 * m will always be freed. 5781 */ 5782 static int 5783 key_get(struct socket *so, struct mbuf *m, 5784 const struct sadb_msghdr *mhp) 5785 { 5786 struct sadb_sa *sa0; 5787 struct sadb_address *src0, *dst0; 5788 struct secasindex saidx; 5789 struct secashead *sah; 5790 struct secasvar *sav = NULL; 5791 u_int16_t proto; 5792 int error; 5793 5794 /* sanity check */ 5795 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5796 panic("key_get: NULL pointer is passed"); 5797 5798 /* map satype to proto */ 5799 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5800 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5801 return key_senderror(so, m, EINVAL); 5802 } 5803 5804 if (mhp->ext[SADB_EXT_SA] == NULL || 5805 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5806 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5807 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5808 return key_senderror(so, m, EINVAL); 5809 } 5810 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5811 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5812 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5813 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5814 return key_senderror(so, m, EINVAL); 5815 } 5816 5817 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5818 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5819 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5820 5821 5822 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5823 dst0 + 1, &saidx)) != 0) 5824 return key_senderror(so, m, EINVAL); 5825 5826 /* get a SA header */ 5827 LIST_FOREACH(sah, &sahtree, chain) { 5828 if (sah->state == SADB_SASTATE_DEAD) 5829 continue; 5830 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5831 continue; 5832 5833 /* get a SA with SPI. */ 5834 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5835 if (sav) 5836 break; 5837 } 5838 if (sah == NULL) { 5839 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5840 return key_senderror(so, m, ENOENT); 5841 } 5842 5843 { 5844 struct mbuf *n; 5845 u_int8_t satype; 5846 5847 /* map proto to satype */ 5848 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5849 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5850 return key_senderror(so, m, EINVAL); 5851 } 5852 5853 /* create new sadb_msg to reply. */ 5854 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5855 mhp->msg->sadb_msg_pid); 5856 if (!n) 5857 return key_senderror(so, m, ENOBUFS); 5858 5859 m_freem(m); 5860 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5861 } 5862 } 5863 5864 /* XXX make it sysctl-configurable? */ 5865 static void 5866 key_getcomb_setlifetime(struct sadb_comb *comb) 5867 { 5868 5869 comb->sadb_comb_soft_allocations = 1; 5870 comb->sadb_comb_hard_allocations = 1; 5871 comb->sadb_comb_soft_bytes = 0; 5872 comb->sadb_comb_hard_bytes = 0; 5873 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5874 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5875 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5876 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5877 } 5878 5879 /* 5880 * XXX reorder combinations by preference 5881 * XXX no idea if the user wants ESP authentication or not 5882 */ 5883 static struct mbuf * 5884 key_getcomb_esp() 5885 { 5886 struct sadb_comb *comb; 5887 struct enc_xform *algo; 5888 struct mbuf *result = NULL, *m, *n; 5889 int encmin; 5890 int i, off, o; 5891 int totlen; 5892 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5893 5894 m = NULL; 5895 for (i = 1; i <= SADB_EALG_MAX; i++) { 5896 algo = esp_algorithm_lookup(i); 5897 if (algo == NULL) 5898 continue; 5899 5900 /* discard algorithms with key size smaller than system min */ 5901 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5902 continue; 5903 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5904 encmin = ipsec_esp_keymin; 5905 else 5906 encmin = _BITS(algo->minkey); 5907 5908 if (ipsec_esp_auth) 5909 m = key_getcomb_ah(); 5910 else { 5911 IPSEC_ASSERT(l <= MLEN, 5912 ("key_getcomb_esp: l=%u > MLEN=%lu", 5913 l, (u_long) MLEN)); 5914 MGET(m, M_DONTWAIT, MT_DATA); 5915 if (m) { 5916 M_ALIGN(m, l); 5917 m->m_len = l; 5918 m->m_next = NULL; 5919 memset(mtod(m, void *), 0, m->m_len); 5920 } 5921 } 5922 if (!m) 5923 goto fail; 5924 5925 totlen = 0; 5926 for (n = m; n; n = n->m_next) 5927 totlen += n->m_len; 5928 IPSEC_ASSERT((totlen % l) == 0, 5929 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 5930 5931 for (off = 0; off < totlen; off += l) { 5932 n = m_pulldown(m, off, l, &o); 5933 if (!n) { 5934 /* m is already freed */ 5935 goto fail; 5936 } 5937 comb = (struct sadb_comb *)(mtod(n, char *) + o); 5938 memset(comb, 0, sizeof(*comb)); 5939 key_getcomb_setlifetime(comb); 5940 comb->sadb_comb_encrypt = i; 5941 comb->sadb_comb_encrypt_minbits = encmin; 5942 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5943 } 5944 5945 if (!result) 5946 result = m; 5947 else 5948 m_cat(result, m); 5949 } 5950 5951 return result; 5952 5953 fail: 5954 if (result) 5955 m_freem(result); 5956 return NULL; 5957 } 5958 5959 static void 5960 key_getsizes_ah(const struct auth_hash *ah, int alg, 5961 u_int16_t* ksmin, u_int16_t* ksmax) 5962 { 5963 *ksmin = *ksmax = ah->keysize; 5964 if (ah->keysize == 0) { 5965 /* 5966 * Transform takes arbitrary key size but algorithm 5967 * key size is restricted. Enforce this here. 5968 */ 5969 switch (alg) { 5970 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 5971 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 5972 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 5973 default: 5974 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 5975 alg)); 5976 break; 5977 } 5978 } 5979 } 5980 5981 /* 5982 * XXX reorder combinations by preference 5983 */ 5984 static struct mbuf * 5985 key_getcomb_ah() 5986 { 5987 struct sadb_comb *comb; 5988 struct auth_hash *algo; 5989 struct mbuf *m; 5990 u_int16_t minkeysize, maxkeysize; 5991 int i; 5992 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5993 5994 m = NULL; 5995 for (i = 1; i <= SADB_AALG_MAX; i++) { 5996 #if 1 5997 /* we prefer HMAC algorithms, not old algorithms */ 5998 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 5999 continue; 6000 #endif 6001 algo = ah_algorithm_lookup(i); 6002 if (!algo) 6003 continue; 6004 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6005 /* discard algorithms with key size smaller than system min */ 6006 if (_BITS(minkeysize) < ipsec_ah_keymin) 6007 continue; 6008 6009 if (!m) { 6010 IPSEC_ASSERT(l <= MLEN, 6011 ("key_getcomb_ah: l=%u > MLEN=%lu", 6012 l, (u_long) MLEN)); 6013 MGET(m, M_DONTWAIT, MT_DATA); 6014 if (m) { 6015 M_ALIGN(m, l); 6016 m->m_len = l; 6017 m->m_next = NULL; 6018 } 6019 } else 6020 M_PREPEND(m, l, M_DONTWAIT); 6021 if (!m) 6022 return NULL; 6023 6024 comb = mtod(m, struct sadb_comb *); 6025 memset(comb, 0, sizeof(*comb)); 6026 key_getcomb_setlifetime(comb); 6027 comb->sadb_comb_auth = i; 6028 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6029 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6030 } 6031 6032 return m; 6033 } 6034 6035 /* 6036 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6037 * XXX reorder combinations by preference 6038 */ 6039 static struct mbuf * 6040 key_getcomb_ipcomp() 6041 { 6042 struct sadb_comb *comb; 6043 struct comp_algo *algo; 6044 struct mbuf *m; 6045 int i; 6046 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6047 6048 m = NULL; 6049 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6050 algo = ipcomp_algorithm_lookup(i); 6051 if (!algo) 6052 continue; 6053 6054 if (!m) { 6055 IPSEC_ASSERT(l <= MLEN, 6056 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 6057 l, (u_long) MLEN)); 6058 MGET(m, M_DONTWAIT, MT_DATA); 6059 if (m) { 6060 M_ALIGN(m, l); 6061 m->m_len = l; 6062 m->m_next = NULL; 6063 } 6064 } else 6065 M_PREPEND(m, l, M_DONTWAIT); 6066 if (!m) 6067 return NULL; 6068 6069 comb = mtod(m, struct sadb_comb *); 6070 memset(comb, 0, sizeof(*comb)); 6071 key_getcomb_setlifetime(comb); 6072 comb->sadb_comb_encrypt = i; 6073 /* what should we set into sadb_comb_*_{min,max}bits? */ 6074 } 6075 6076 return m; 6077 } 6078 6079 /* 6080 * XXX no way to pass mode (transport/tunnel) to userland 6081 * XXX replay checking? 6082 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6083 */ 6084 static struct mbuf * 6085 key_getprop(const struct secasindex *saidx) 6086 { 6087 struct sadb_prop *prop; 6088 struct mbuf *m, *n; 6089 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6090 int totlen; 6091 6092 switch (saidx->proto) { 6093 case IPPROTO_ESP: 6094 m = key_getcomb_esp(); 6095 break; 6096 case IPPROTO_AH: 6097 m = key_getcomb_ah(); 6098 break; 6099 case IPPROTO_IPCOMP: 6100 m = key_getcomb_ipcomp(); 6101 break; 6102 default: 6103 return NULL; 6104 } 6105 6106 if (!m) 6107 return NULL; 6108 M_PREPEND(m, l, M_DONTWAIT); 6109 if (!m) 6110 return NULL; 6111 6112 totlen = 0; 6113 for (n = m; n; n = n->m_next) 6114 totlen += n->m_len; 6115 6116 prop = mtod(m, struct sadb_prop *); 6117 memset(prop, 0, sizeof(*prop)); 6118 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6119 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6120 prop->sadb_prop_replay = 32; /* XXX */ 6121 6122 return m; 6123 } 6124 6125 /* 6126 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6127 * send 6128 * <base, SA, address(SD), (address(P)), x_policy, 6129 * (identity(SD),) (sensitivity,) proposal> 6130 * to KMD, and expect to receive 6131 * <base> with SADB_ACQUIRE if error occurred, 6132 * or 6133 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6134 * from KMD by PF_KEY. 6135 * 6136 * XXX x_policy is outside of RFC2367 (KAME extension). 6137 * XXX sensitivity is not supported. 6138 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6139 * see comment for key_getcomb_ipcomp(). 6140 * 6141 * OUT: 6142 * 0 : succeed 6143 * others: error number 6144 */ 6145 static int 6146 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6147 { 6148 struct mbuf *result = NULL, *m; 6149 #ifndef IPSEC_NONBLOCK_ACQUIRE 6150 struct secacq *newacq; 6151 #endif 6152 u_int8_t satype; 6153 int error = -1; 6154 u_int32_t seq; 6155 6156 /* sanity check */ 6157 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 6158 satype = key_proto2satype(saidx->proto); 6159 IPSEC_ASSERT(satype != 0, 6160 ("key_acquire: null satype, protocol %u", saidx->proto)); 6161 6162 #ifndef IPSEC_NONBLOCK_ACQUIRE 6163 /* 6164 * We never do anything about acquirng SA. There is anather 6165 * solution that kernel blocks to send SADB_ACQUIRE message until 6166 * getting something message from IKEd. In later case, to be 6167 * managed with ACQUIRING list. 6168 */ 6169 /* Get an entry to check whether sending message or not. */ 6170 if ((newacq = key_getacq(saidx)) != NULL) { 6171 if (key_blockacq_count < newacq->count) { 6172 /* reset counter and do send message. */ 6173 newacq->count = 0; 6174 } else { 6175 /* increment counter and do nothing. */ 6176 newacq->count++; 6177 return 0; 6178 } 6179 } else { 6180 /* make new entry for blocking to send SADB_ACQUIRE. */ 6181 if ((newacq = key_newacq(saidx)) == NULL) 6182 return ENOBUFS; 6183 6184 /* add to acqtree */ 6185 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6186 } 6187 #endif 6188 6189 6190 #ifndef IPSEC_NONBLOCK_ACQUIRE 6191 seq = newacq->seq; 6192 #else 6193 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6194 #endif 6195 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6196 if (!m) { 6197 error = ENOBUFS; 6198 goto fail; 6199 } 6200 result = m; 6201 6202 /* set sadb_address for saidx's. */ 6203 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6204 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6205 if (!m) { 6206 error = ENOBUFS; 6207 goto fail; 6208 } 6209 m_cat(result, m); 6210 6211 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6212 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6213 if (!m) { 6214 error = ENOBUFS; 6215 goto fail; 6216 } 6217 m_cat(result, m); 6218 6219 /* XXX proxy address (optional) */ 6220 6221 /* set sadb_x_policy */ 6222 if (sp) { 6223 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6224 if (!m) { 6225 error = ENOBUFS; 6226 goto fail; 6227 } 6228 m_cat(result, m); 6229 } 6230 6231 /* XXX identity (optional) */ 6232 #if 0 6233 if (idexttype && fqdn) { 6234 /* create identity extension (FQDN) */ 6235 struct sadb_ident *id; 6236 int fqdnlen; 6237 6238 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6239 id = (struct sadb_ident *)p; 6240 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6241 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6242 id->sadb_ident_exttype = idexttype; 6243 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6244 memcpy(id + 1, fqdn, fqdnlen); 6245 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6246 } 6247 6248 if (idexttype) { 6249 /* create identity extension (USERFQDN) */ 6250 struct sadb_ident *id; 6251 int userfqdnlen; 6252 6253 if (userfqdn) { 6254 /* +1 for terminating-NUL */ 6255 userfqdnlen = strlen(userfqdn) + 1; 6256 } else 6257 userfqdnlen = 0; 6258 id = (struct sadb_ident *)p; 6259 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6260 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6261 id->sadb_ident_exttype = idexttype; 6262 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6263 /* XXX is it correct? */ 6264 if (curlwp) 6265 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6266 if (userfqdn && userfqdnlen) 6267 memcpy(id + 1, userfqdn, userfqdnlen); 6268 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6269 } 6270 #endif 6271 6272 /* XXX sensitivity (optional) */ 6273 6274 /* create proposal/combination extension */ 6275 m = key_getprop(saidx); 6276 #if 0 6277 /* 6278 * spec conformant: always attach proposal/combination extension, 6279 * the problem is that we have no way to attach it for ipcomp, 6280 * due to the way sadb_comb is declared in RFC2367. 6281 */ 6282 if (!m) { 6283 error = ENOBUFS; 6284 goto fail; 6285 } 6286 m_cat(result, m); 6287 #else 6288 /* 6289 * outside of spec; make proposal/combination extension optional. 6290 */ 6291 if (m) 6292 m_cat(result, m); 6293 #endif 6294 6295 if ((result->m_flags & M_PKTHDR) == 0) { 6296 error = EINVAL; 6297 goto fail; 6298 } 6299 6300 if (result->m_len < sizeof(struct sadb_msg)) { 6301 result = m_pullup(result, sizeof(struct sadb_msg)); 6302 if (result == NULL) { 6303 error = ENOBUFS; 6304 goto fail; 6305 } 6306 } 6307 6308 result->m_pkthdr.len = 0; 6309 for (m = result; m; m = m->m_next) 6310 result->m_pkthdr.len += m->m_len; 6311 6312 mtod(result, struct sadb_msg *)->sadb_msg_len = 6313 PFKEY_UNIT64(result->m_pkthdr.len); 6314 6315 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6316 6317 fail: 6318 if (result) 6319 m_freem(result); 6320 return error; 6321 } 6322 6323 #ifndef IPSEC_NONBLOCK_ACQUIRE 6324 static struct secacq * 6325 key_newacq(const struct secasindex *saidx) 6326 { 6327 struct secacq *newacq; 6328 6329 /* get new entry */ 6330 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6331 if (newacq == NULL) { 6332 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6333 return NULL; 6334 } 6335 memset(newacq, 0, sizeof(*newacq)); 6336 6337 /* copy secindex */ 6338 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6339 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6340 newacq->created = time_second; 6341 newacq->count = 0; 6342 6343 return newacq; 6344 } 6345 6346 static struct secacq * 6347 key_getacq(const struct secasindex *saidx) 6348 { 6349 struct secacq *acq; 6350 6351 LIST_FOREACH(acq, &acqtree, chain) { 6352 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6353 return acq; 6354 } 6355 6356 return NULL; 6357 } 6358 6359 static struct secacq * 6360 key_getacqbyseq(u_int32_t seq) 6361 { 6362 struct secacq *acq; 6363 6364 LIST_FOREACH(acq, &acqtree, chain) { 6365 if (acq->seq == seq) 6366 return acq; 6367 } 6368 6369 return NULL; 6370 } 6371 #endif 6372 6373 static struct secspacq * 6374 key_newspacq(struct secpolicyindex *spidx) 6375 { 6376 struct secspacq *acq; 6377 6378 /* get new entry */ 6379 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6380 if (acq == NULL) { 6381 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6382 return NULL; 6383 } 6384 memset(acq, 0, sizeof(*acq)); 6385 6386 /* copy secindex */ 6387 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6388 acq->created = time_second; 6389 acq->count = 0; 6390 6391 return acq; 6392 } 6393 6394 static struct secspacq * 6395 key_getspacq(struct secpolicyindex *spidx) 6396 { 6397 struct secspacq *acq; 6398 6399 LIST_FOREACH(acq, &spacqtree, chain) { 6400 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6401 return acq; 6402 } 6403 6404 return NULL; 6405 } 6406 6407 /* 6408 * SADB_ACQUIRE processing, 6409 * in first situation, is receiving 6410 * <base> 6411 * from the ikmpd, and clear sequence of its secasvar entry. 6412 * 6413 * In second situation, is receiving 6414 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6415 * from a user land process, and return 6416 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6417 * to the socket. 6418 * 6419 * m will always be freed. 6420 */ 6421 static int 6422 key_acquire2(struct socket *so, struct mbuf *m, 6423 const struct sadb_msghdr *mhp) 6424 { 6425 const struct sadb_address *src0, *dst0; 6426 struct secasindex saidx; 6427 struct secashead *sah; 6428 u_int16_t proto; 6429 int error; 6430 6431 /* sanity check */ 6432 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6433 panic("key_acquire2: NULL pointer is passed"); 6434 6435 /* 6436 * Error message from KMd. 6437 * We assume that if error was occurred in IKEd, the length of PFKEY 6438 * message is equal to the size of sadb_msg structure. 6439 * We do not raise error even if error occurred in this function. 6440 */ 6441 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6442 #ifndef IPSEC_NONBLOCK_ACQUIRE 6443 struct secacq *acq; 6444 6445 /* check sequence number */ 6446 if (mhp->msg->sadb_msg_seq == 0) { 6447 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6448 m_freem(m); 6449 return 0; 6450 } 6451 6452 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6453 /* 6454 * the specified larval SA is already gone, or we got 6455 * a bogus sequence number. we can silently ignore it. 6456 */ 6457 m_freem(m); 6458 return 0; 6459 } 6460 6461 /* reset acq counter in order to deletion by timehander. */ 6462 acq->created = time_second; 6463 acq->count = 0; 6464 #endif 6465 m_freem(m); 6466 return 0; 6467 } 6468 6469 /* 6470 * This message is from user land. 6471 */ 6472 6473 /* map satype to proto */ 6474 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6475 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6476 return key_senderror(so, m, EINVAL); 6477 } 6478 6479 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6480 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6481 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6482 /* error */ 6483 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6484 return key_senderror(so, m, EINVAL); 6485 } 6486 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6487 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6488 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6489 /* error */ 6490 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6491 return key_senderror(so, m, EINVAL); 6492 } 6493 6494 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6495 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6496 6497 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 6498 dst0 + 1, &saidx)) != 0) 6499 return key_senderror(so, m, EINVAL); 6500 6501 /* get a SA index */ 6502 LIST_FOREACH(sah, &sahtree, chain) { 6503 if (sah->state == SADB_SASTATE_DEAD) 6504 continue; 6505 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6506 break; 6507 } 6508 if (sah != NULL) { 6509 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6510 return key_senderror(so, m, EEXIST); 6511 } 6512 6513 error = key_acquire(&saidx, NULL); 6514 if (error != 0) { 6515 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6516 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6517 return key_senderror(so, m, error); 6518 } 6519 6520 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6521 } 6522 6523 /* 6524 * SADB_REGISTER processing. 6525 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6526 * receive 6527 * <base> 6528 * from the ikmpd, and register a socket to send PF_KEY messages, 6529 * and send 6530 * <base, supported> 6531 * to KMD by PF_KEY. 6532 * If socket is detached, must free from regnode. 6533 * 6534 * m will always be freed. 6535 */ 6536 static int 6537 key_register(struct socket *so, struct mbuf *m, 6538 const struct sadb_msghdr *mhp) 6539 { 6540 struct secreg *reg, *newreg = 0; 6541 6542 /* sanity check */ 6543 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6544 panic("key_register: NULL pointer is passed"); 6545 6546 /* check for invalid register message */ 6547 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6548 return key_senderror(so, m, EINVAL); 6549 6550 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6551 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6552 goto setmsg; 6553 6554 /* check whether existing or not */ 6555 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6556 if (reg->so == so) { 6557 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6558 return key_senderror(so, m, EEXIST); 6559 } 6560 } 6561 6562 /* create regnode */ 6563 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6564 if (newreg == NULL) { 6565 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6566 return key_senderror(so, m, ENOBUFS); 6567 } 6568 memset(newreg, 0, sizeof(*newreg)); 6569 6570 newreg->so = so; 6571 ((struct keycb *)sotorawcb(so))->kp_registered++; 6572 6573 /* add regnode to regtree. */ 6574 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6575 6576 setmsg: 6577 { 6578 struct mbuf *n; 6579 struct sadb_msg *newmsg; 6580 struct sadb_supported *sup; 6581 u_int len, alen, elen; 6582 int off; 6583 int i; 6584 struct sadb_alg *alg; 6585 6586 /* create new sadb_msg to reply. */ 6587 alen = 0; 6588 for (i = 1; i <= SADB_AALG_MAX; i++) { 6589 if (ah_algorithm_lookup(i)) 6590 alen += sizeof(struct sadb_alg); 6591 } 6592 if (alen) 6593 alen += sizeof(struct sadb_supported); 6594 elen = 0; 6595 for (i = 1; i <= SADB_EALG_MAX; i++) { 6596 if (esp_algorithm_lookup(i)) 6597 elen += sizeof(struct sadb_alg); 6598 } 6599 if (elen) 6600 elen += sizeof(struct sadb_supported); 6601 6602 len = sizeof(struct sadb_msg) + alen + elen; 6603 6604 if (len > MCLBYTES) 6605 return key_senderror(so, m, ENOBUFS); 6606 6607 MGETHDR(n, M_DONTWAIT, MT_DATA); 6608 if (len > MHLEN) { 6609 MCLGET(n, M_DONTWAIT); 6610 if ((n->m_flags & M_EXT) == 0) { 6611 m_freem(n); 6612 n = NULL; 6613 } 6614 } 6615 if (!n) 6616 return key_senderror(so, m, ENOBUFS); 6617 6618 n->m_pkthdr.len = n->m_len = len; 6619 n->m_next = NULL; 6620 off = 0; 6621 6622 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6623 newmsg = mtod(n, struct sadb_msg *); 6624 newmsg->sadb_msg_errno = 0; 6625 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6626 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6627 6628 /* for authentication algorithm */ 6629 if (alen) { 6630 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6631 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6632 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6633 off += PFKEY_ALIGN8(sizeof(*sup)); 6634 6635 for (i = 1; i <= SADB_AALG_MAX; i++) { 6636 struct auth_hash *aalgo; 6637 u_int16_t minkeysize, maxkeysize; 6638 6639 aalgo = ah_algorithm_lookup(i); 6640 if (!aalgo) 6641 continue; 6642 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6643 alg->sadb_alg_id = i; 6644 alg->sadb_alg_ivlen = 0; 6645 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6646 alg->sadb_alg_minbits = _BITS(minkeysize); 6647 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6648 off += PFKEY_ALIGN8(sizeof(*alg)); 6649 } 6650 } 6651 6652 /* for encryption algorithm */ 6653 if (elen) { 6654 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6655 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6656 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6657 off += PFKEY_ALIGN8(sizeof(*sup)); 6658 6659 for (i = 1; i <= SADB_EALG_MAX; i++) { 6660 struct enc_xform *ealgo; 6661 6662 ealgo = esp_algorithm_lookup(i); 6663 if (!ealgo) 6664 continue; 6665 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6666 alg->sadb_alg_id = i; 6667 alg->sadb_alg_ivlen = ealgo->blocksize; 6668 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6669 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6670 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6671 } 6672 } 6673 6674 #ifdef DIAGNOSTIC 6675 if (off != len) 6676 panic("length assumption failed in key_register"); 6677 #endif 6678 6679 m_freem(m); 6680 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6681 } 6682 } 6683 6684 /* 6685 * free secreg entry registered. 6686 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6687 */ 6688 void 6689 key_freereg(struct socket *so) 6690 { 6691 struct secreg *reg; 6692 int i; 6693 6694 /* sanity check */ 6695 if (so == NULL) 6696 panic("key_freereg: NULL pointer is passed"); 6697 6698 /* 6699 * check whether existing or not. 6700 * check all type of SA, because there is a potential that 6701 * one socket is registered to multiple type of SA. 6702 */ 6703 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6704 LIST_FOREACH(reg, ®tree[i], chain) { 6705 if (reg->so == so 6706 && __LIST_CHAINED(reg)) { 6707 LIST_REMOVE(reg, chain); 6708 KFREE(reg); 6709 break; 6710 } 6711 } 6712 } 6713 6714 return; 6715 } 6716 6717 /* 6718 * SADB_EXPIRE processing 6719 * send 6720 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6721 * to KMD by PF_KEY. 6722 * NOTE: We send only soft lifetime extension. 6723 * 6724 * OUT: 0 : succeed 6725 * others : error number 6726 */ 6727 static int 6728 key_expire(struct secasvar *sav) 6729 { 6730 int s; 6731 int satype; 6732 struct mbuf *result = NULL, *m; 6733 int len; 6734 int error = -1; 6735 struct sadb_lifetime *lt; 6736 6737 /* XXX: Why do we lock ? */ 6738 s = splsoftnet(); /*called from softclock()*/ 6739 6740 /* sanity check */ 6741 if (sav == NULL) 6742 panic("key_expire: NULL pointer is passed"); 6743 if (sav->sah == NULL) 6744 panic("key_expire: Why was SA index in SA NULL"); 6745 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6746 panic("key_expire: invalid proto is passed"); 6747 6748 /* set msg header */ 6749 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6750 if (!m) { 6751 error = ENOBUFS; 6752 goto fail; 6753 } 6754 result = m; 6755 6756 /* create SA extension */ 6757 m = key_setsadbsa(sav); 6758 if (!m) { 6759 error = ENOBUFS; 6760 goto fail; 6761 } 6762 m_cat(result, m); 6763 6764 /* create SA extension */ 6765 m = key_setsadbxsa2(sav->sah->saidx.mode, 6766 sav->replay ? sav->replay->count : 0, 6767 sav->sah->saidx.reqid); 6768 if (!m) { 6769 error = ENOBUFS; 6770 goto fail; 6771 } 6772 m_cat(result, m); 6773 6774 /* create lifetime extension (current and soft) */ 6775 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6776 m = key_alloc_mbuf(len); 6777 if (!m || m->m_next) { /*XXX*/ 6778 if (m) 6779 m_freem(m); 6780 error = ENOBUFS; 6781 goto fail; 6782 } 6783 memset(mtod(m, void *), 0, len); 6784 lt = mtod(m, struct sadb_lifetime *); 6785 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6786 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6787 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6788 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6789 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime; 6790 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime; 6791 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6792 memcpy(lt, sav->lft_s, sizeof(*lt)); 6793 m_cat(result, m); 6794 6795 /* set sadb_address for source */ 6796 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6797 &sav->sah->saidx.src.sa, 6798 FULLMASK, IPSEC_ULPROTO_ANY); 6799 if (!m) { 6800 error = ENOBUFS; 6801 goto fail; 6802 } 6803 m_cat(result, m); 6804 6805 /* set sadb_address for destination */ 6806 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6807 &sav->sah->saidx.dst.sa, 6808 FULLMASK, IPSEC_ULPROTO_ANY); 6809 if (!m) { 6810 error = ENOBUFS; 6811 goto fail; 6812 } 6813 m_cat(result, m); 6814 6815 if ((result->m_flags & M_PKTHDR) == 0) { 6816 error = EINVAL; 6817 goto fail; 6818 } 6819 6820 if (result->m_len < sizeof(struct sadb_msg)) { 6821 result = m_pullup(result, sizeof(struct sadb_msg)); 6822 if (result == NULL) { 6823 error = ENOBUFS; 6824 goto fail; 6825 } 6826 } 6827 6828 result->m_pkthdr.len = 0; 6829 for (m = result; m; m = m->m_next) 6830 result->m_pkthdr.len += m->m_len; 6831 6832 mtod(result, struct sadb_msg *)->sadb_msg_len = 6833 PFKEY_UNIT64(result->m_pkthdr.len); 6834 6835 splx(s); 6836 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6837 6838 fail: 6839 if (result) 6840 m_freem(result); 6841 splx(s); 6842 return error; 6843 } 6844 6845 /* 6846 * SADB_FLUSH processing 6847 * receive 6848 * <base> 6849 * from the ikmpd, and free all entries in secastree. 6850 * and send, 6851 * <base> 6852 * to the ikmpd. 6853 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6854 * 6855 * m will always be freed. 6856 */ 6857 static int 6858 key_flush(struct socket *so, struct mbuf *m, 6859 const struct sadb_msghdr *mhp) 6860 { 6861 struct sadb_msg *newmsg; 6862 struct secashead *sah, *nextsah; 6863 struct secasvar *sav, *nextsav; 6864 u_int16_t proto; 6865 u_int8_t state; 6866 u_int stateidx; 6867 6868 /* sanity check */ 6869 if (so == NULL || mhp == NULL || mhp->msg == NULL) 6870 panic("key_flush: NULL pointer is passed"); 6871 6872 /* map satype to proto */ 6873 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6874 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6875 return key_senderror(so, m, EINVAL); 6876 } 6877 6878 /* no SATYPE specified, i.e. flushing all SA. */ 6879 for (sah = LIST_FIRST(&sahtree); 6880 sah != NULL; 6881 sah = nextsah) { 6882 nextsah = LIST_NEXT(sah, chain); 6883 6884 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6885 && proto != sah->saidx.proto) 6886 continue; 6887 6888 for (stateidx = 0; 6889 stateidx < _ARRAYLEN(saorder_state_alive); 6890 stateidx++) { 6891 state = saorder_state_any[stateidx]; 6892 for (sav = LIST_FIRST(&sah->savtree[state]); 6893 sav != NULL; 6894 sav = nextsav) { 6895 6896 nextsav = LIST_NEXT(sav, chain); 6897 6898 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6899 KEY_FREESAV(&sav); 6900 } 6901 } 6902 6903 sah->state = SADB_SASTATE_DEAD; 6904 } 6905 6906 if (m->m_len < sizeof(struct sadb_msg) || 6907 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6908 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 6909 return key_senderror(so, m, ENOBUFS); 6910 } 6911 6912 if (m->m_next) 6913 m_freem(m->m_next); 6914 m->m_next = NULL; 6915 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6916 newmsg = mtod(m, struct sadb_msg *); 6917 newmsg->sadb_msg_errno = 0; 6918 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6919 6920 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6921 } 6922 6923 6924 static struct mbuf * 6925 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6926 { 6927 struct secashead *sah; 6928 struct secasvar *sav; 6929 u_int16_t proto; 6930 u_int stateidx; 6931 u_int8_t satype; 6932 u_int8_t state; 6933 int cnt; 6934 struct mbuf *m, *n, *prev; 6935 int totlen; 6936 6937 *lenp = 0; 6938 6939 /* map satype to proto */ 6940 if ((proto = key_satype2proto(req_satype)) == 0) { 6941 *errorp = EINVAL; 6942 return (NULL); 6943 } 6944 6945 /* count sav entries to be sent to userland. */ 6946 cnt = 0; 6947 LIST_FOREACH(sah, &sahtree, chain) { 6948 if (req_satype != SADB_SATYPE_UNSPEC && 6949 proto != sah->saidx.proto) 6950 continue; 6951 6952 for (stateidx = 0; 6953 stateidx < _ARRAYLEN(saorder_state_any); 6954 stateidx++) { 6955 state = saorder_state_any[stateidx]; 6956 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6957 cnt++; 6958 } 6959 } 6960 } 6961 6962 if (cnt == 0) { 6963 *errorp = ENOENT; 6964 return (NULL); 6965 } 6966 6967 /* send this to the userland, one at a time. */ 6968 m = NULL; 6969 prev = m; 6970 LIST_FOREACH(sah, &sahtree, chain) { 6971 if (req_satype != SADB_SATYPE_UNSPEC && 6972 proto != sah->saidx.proto) 6973 continue; 6974 6975 /* map proto to satype */ 6976 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 6977 m_freem(m); 6978 *errorp = EINVAL; 6979 return (NULL); 6980 } 6981 6982 for (stateidx = 0; 6983 stateidx < _ARRAYLEN(saorder_state_any); 6984 stateidx++) { 6985 state = saorder_state_any[stateidx]; 6986 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6987 n = key_setdumpsa(sav, SADB_DUMP, satype, 6988 --cnt, pid); 6989 if (!n) { 6990 m_freem(m); 6991 *errorp = ENOBUFS; 6992 return (NULL); 6993 } 6994 6995 totlen += n->m_pkthdr.len; 6996 if (!m) 6997 m = n; 6998 else 6999 prev->m_nextpkt = n; 7000 prev = n; 7001 } 7002 } 7003 } 7004 7005 if (!m) { 7006 *errorp = EINVAL; 7007 return (NULL); 7008 } 7009 7010 if ((m->m_flags & M_PKTHDR) != 0) { 7011 m->m_pkthdr.len = 0; 7012 for (n = m; n; n = n->m_next) 7013 m->m_pkthdr.len += n->m_len; 7014 } 7015 7016 *errorp = 0; 7017 return (m); 7018 } 7019 7020 /* 7021 * SADB_DUMP processing 7022 * dump all entries including status of DEAD in SAD. 7023 * receive 7024 * <base> 7025 * from the ikmpd, and dump all secasvar leaves 7026 * and send, 7027 * <base> ..... 7028 * to the ikmpd. 7029 * 7030 * m will always be freed. 7031 */ 7032 static int 7033 key_dump(struct socket *so, struct mbuf *m0, 7034 const struct sadb_msghdr *mhp) 7035 { 7036 u_int16_t proto; 7037 u_int8_t satype; 7038 struct mbuf *n; 7039 int s; 7040 int error, len, ok; 7041 7042 /* sanity check */ 7043 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 7044 panic("key_dump: NULL pointer is passed"); 7045 7046 /* map satype to proto */ 7047 satype = mhp->msg->sadb_msg_satype; 7048 if ((proto = key_satype2proto(satype)) == 0) { 7049 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 7050 return key_senderror(so, m0, EINVAL); 7051 } 7052 7053 /* 7054 * If the requestor has insufficient socket-buffer space 7055 * for the entire chain, nobody gets any response to the DUMP. 7056 * XXX For now, only the requestor ever gets anything. 7057 * Moreover, if the requestor has any space at all, they receive 7058 * the entire chain, otherwise the request is refused with ENOBUFS. 7059 */ 7060 if (sbspace(&so->so_rcv) <= 0) { 7061 return key_senderror(so, m0, ENOBUFS); 7062 } 7063 7064 s = splsoftnet(); 7065 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7066 splx(s); 7067 7068 if (n == NULL) { 7069 return key_senderror(so, m0, ENOENT); 7070 } 7071 { 7072 uint64_t *ps = PFKEY_STAT_GETREF(); 7073 ps[PFKEY_STAT_IN_TOTAL]++; 7074 ps[PFKEY_STAT_IN_BYTES] += len; 7075 PFKEY_STAT_PUTREF(); 7076 } 7077 7078 /* 7079 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7080 * The requestor receives either the entire chain, or an 7081 * error message with ENOBUFS. 7082 * 7083 * sbappendaddrchain() takes the chain of entries, one 7084 * packet-record per SPD entry, prepends the key_src sockaddr 7085 * to each packet-record, links the sockaddr mbufs into a new 7086 * list of records, then appends the entire resulting 7087 * list to the requesting socket. 7088 */ 7089 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 7090 n, SB_PRIO_ONESHOT_OVERFLOW); 7091 7092 if (!ok) { 7093 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7094 m_freem(n); 7095 return key_senderror(so, m0, ENOBUFS); 7096 } 7097 7098 m_freem(m0); 7099 return 0; 7100 } 7101 7102 /* 7103 * SADB_X_PROMISC processing 7104 * 7105 * m will always be freed. 7106 */ 7107 static int 7108 key_promisc(struct socket *so, struct mbuf *m, 7109 const struct sadb_msghdr *mhp) 7110 { 7111 int olen; 7112 7113 /* sanity check */ 7114 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 7115 panic("key_promisc: NULL pointer is passed"); 7116 7117 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7118 7119 if (olen < sizeof(struct sadb_msg)) { 7120 #if 1 7121 return key_senderror(so, m, EINVAL); 7122 #else 7123 m_freem(m); 7124 return 0; 7125 #endif 7126 } else if (olen == sizeof(struct sadb_msg)) { 7127 /* enable/disable promisc mode */ 7128 struct keycb *kp; 7129 7130 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7131 return key_senderror(so, m, EINVAL); 7132 mhp->msg->sadb_msg_errno = 0; 7133 switch (mhp->msg->sadb_msg_satype) { 7134 case 0: 7135 case 1: 7136 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7137 break; 7138 default: 7139 return key_senderror(so, m, EINVAL); 7140 } 7141 7142 /* send the original message back to everyone */ 7143 mhp->msg->sadb_msg_errno = 0; 7144 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7145 } else { 7146 /* send packet as is */ 7147 7148 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7149 7150 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7151 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7152 } 7153 } 7154 7155 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7156 const struct sadb_msghdr *) = { 7157 NULL, /* SADB_RESERVED */ 7158 key_getspi, /* SADB_GETSPI */ 7159 key_update, /* SADB_UPDATE */ 7160 key_add, /* SADB_ADD */ 7161 key_delete, /* SADB_DELETE */ 7162 key_get, /* SADB_GET */ 7163 key_acquire2, /* SADB_ACQUIRE */ 7164 key_register, /* SADB_REGISTER */ 7165 NULL, /* SADB_EXPIRE */ 7166 key_flush, /* SADB_FLUSH */ 7167 key_dump, /* SADB_DUMP */ 7168 key_promisc, /* SADB_X_PROMISC */ 7169 NULL, /* SADB_X_PCHANGE */ 7170 key_spdadd, /* SADB_X_SPDUPDATE */ 7171 key_spdadd, /* SADB_X_SPDADD */ 7172 key_spddelete, /* SADB_X_SPDDELETE */ 7173 key_spdget, /* SADB_X_SPDGET */ 7174 NULL, /* SADB_X_SPDACQUIRE */ 7175 key_spddump, /* SADB_X_SPDDUMP */ 7176 key_spdflush, /* SADB_X_SPDFLUSH */ 7177 key_spdadd, /* SADB_X_SPDSETIDX */ 7178 NULL, /* SADB_X_SPDEXPIRE */ 7179 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7180 #ifdef IPSEC_NAT_T 7181 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7182 #endif 7183 }; 7184 7185 /* 7186 * parse sadb_msg buffer to process PFKEYv2, 7187 * and create a data to response if needed. 7188 * I think to be dealed with mbuf directly. 7189 * IN: 7190 * msgp : pointer to pointer to a received buffer pulluped. 7191 * This is rewrited to response. 7192 * so : pointer to socket. 7193 * OUT: 7194 * length for buffer to send to user process. 7195 */ 7196 int 7197 key_parse(struct mbuf *m, struct socket *so) 7198 { 7199 struct sadb_msg *msg; 7200 struct sadb_msghdr mh; 7201 u_int orglen; 7202 int error; 7203 int target; 7204 7205 /* sanity check */ 7206 if (m == NULL || so == NULL) 7207 panic("key_parse: NULL pointer is passed"); 7208 7209 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7210 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7211 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 7212 kdebug_sadb(msg)); 7213 #endif 7214 7215 if (m->m_len < sizeof(struct sadb_msg)) { 7216 m = m_pullup(m, sizeof(struct sadb_msg)); 7217 if (!m) 7218 return ENOBUFS; 7219 } 7220 msg = mtod(m, struct sadb_msg *); 7221 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7222 target = KEY_SENDUP_ONE; 7223 7224 if ((m->m_flags & M_PKTHDR) == 0 || 7225 m->m_pkthdr.len != m->m_pkthdr.len) { 7226 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 7227 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7228 error = EINVAL; 7229 goto senderror; 7230 } 7231 7232 if (msg->sadb_msg_version != PF_KEY_V2) { 7233 ipseclog((LOG_DEBUG, 7234 "key_parse: PF_KEY version %u is mismatched.\n", 7235 msg->sadb_msg_version)); 7236 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7237 error = EINVAL; 7238 goto senderror; 7239 } 7240 7241 if (msg->sadb_msg_type > SADB_MAX) { 7242 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7243 msg->sadb_msg_type)); 7244 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7245 error = EINVAL; 7246 goto senderror; 7247 } 7248 7249 /* for old-fashioned code - should be nuked */ 7250 if (m->m_pkthdr.len > MCLBYTES) { 7251 m_freem(m); 7252 return ENOBUFS; 7253 } 7254 if (m->m_next) { 7255 struct mbuf *n; 7256 7257 MGETHDR(n, M_DONTWAIT, MT_DATA); 7258 if (n && m->m_pkthdr.len > MHLEN) { 7259 MCLGET(n, M_DONTWAIT); 7260 if ((n->m_flags & M_EXT) == 0) { 7261 m_free(n); 7262 n = NULL; 7263 } 7264 } 7265 if (!n) { 7266 m_freem(m); 7267 return ENOBUFS; 7268 } 7269 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7270 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7271 n->m_next = NULL; 7272 m_freem(m); 7273 m = n; 7274 } 7275 7276 /* align the mbuf chain so that extensions are in contiguous region. */ 7277 error = key_align(m, &mh); 7278 if (error) 7279 return error; 7280 7281 if (m->m_next) { /*XXX*/ 7282 m_freem(m); 7283 return ENOBUFS; 7284 } 7285 7286 msg = mh.msg; 7287 7288 /* check SA type */ 7289 switch (msg->sadb_msg_satype) { 7290 case SADB_SATYPE_UNSPEC: 7291 switch (msg->sadb_msg_type) { 7292 case SADB_GETSPI: 7293 case SADB_UPDATE: 7294 case SADB_ADD: 7295 case SADB_DELETE: 7296 case SADB_GET: 7297 case SADB_ACQUIRE: 7298 case SADB_EXPIRE: 7299 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7300 "when msg type=%u.\n", msg->sadb_msg_type)); 7301 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7302 error = EINVAL; 7303 goto senderror; 7304 } 7305 break; 7306 case SADB_SATYPE_AH: 7307 case SADB_SATYPE_ESP: 7308 case SADB_X_SATYPE_IPCOMP: 7309 case SADB_X_SATYPE_TCPSIGNATURE: 7310 switch (msg->sadb_msg_type) { 7311 case SADB_X_SPDADD: 7312 case SADB_X_SPDDELETE: 7313 case SADB_X_SPDGET: 7314 case SADB_X_SPDDUMP: 7315 case SADB_X_SPDFLUSH: 7316 case SADB_X_SPDSETIDX: 7317 case SADB_X_SPDUPDATE: 7318 case SADB_X_SPDDELETE2: 7319 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7320 msg->sadb_msg_type)); 7321 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7322 error = EINVAL; 7323 goto senderror; 7324 } 7325 break; 7326 case SADB_SATYPE_RSVP: 7327 case SADB_SATYPE_OSPFV2: 7328 case SADB_SATYPE_RIPV2: 7329 case SADB_SATYPE_MIP: 7330 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7331 msg->sadb_msg_satype)); 7332 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7333 error = EOPNOTSUPP; 7334 goto senderror; 7335 case 1: /* XXX: What does it do? */ 7336 if (msg->sadb_msg_type == SADB_X_PROMISC) 7337 break; 7338 /*FALLTHROUGH*/ 7339 default: 7340 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7341 msg->sadb_msg_satype)); 7342 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7343 error = EINVAL; 7344 goto senderror; 7345 } 7346 7347 /* check field of upper layer protocol and address family */ 7348 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7349 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7350 struct sadb_address *src0, *dst0; 7351 u_int plen; 7352 7353 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7354 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7355 7356 /* check upper layer protocol */ 7357 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7358 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7359 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7360 error = EINVAL; 7361 goto senderror; 7362 } 7363 7364 /* check family */ 7365 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7366 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7367 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7368 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7369 error = EINVAL; 7370 goto senderror; 7371 } 7372 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7373 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7374 ipseclog((LOG_DEBUG, 7375 "key_parse: address struct size mismatched.\n")); 7376 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7377 error = EINVAL; 7378 goto senderror; 7379 } 7380 7381 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7382 case AF_INET: 7383 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7384 sizeof(struct sockaddr_in)) { 7385 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7386 error = EINVAL; 7387 goto senderror; 7388 } 7389 break; 7390 case AF_INET6: 7391 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7392 sizeof(struct sockaddr_in6)) { 7393 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7394 error = EINVAL; 7395 goto senderror; 7396 } 7397 break; 7398 default: 7399 ipseclog((LOG_DEBUG, 7400 "key_parse: unsupported address family.\n")); 7401 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7402 error = EAFNOSUPPORT; 7403 goto senderror; 7404 } 7405 7406 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7407 case AF_INET: 7408 plen = sizeof(struct in_addr) << 3; 7409 break; 7410 case AF_INET6: 7411 plen = sizeof(struct in6_addr) << 3; 7412 break; 7413 default: 7414 plen = 0; /*fool gcc*/ 7415 break; 7416 } 7417 7418 /* check max prefix length */ 7419 if (src0->sadb_address_prefixlen > plen || 7420 dst0->sadb_address_prefixlen > plen) { 7421 ipseclog((LOG_DEBUG, 7422 "key_parse: illegal prefixlen.\n")); 7423 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7424 error = EINVAL; 7425 goto senderror; 7426 } 7427 7428 /* 7429 * prefixlen == 0 is valid because there can be a case when 7430 * all addresses are matched. 7431 */ 7432 } 7433 7434 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7435 key_typesw[msg->sadb_msg_type] == NULL) { 7436 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7437 error = EINVAL; 7438 goto senderror; 7439 } 7440 7441 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7442 7443 senderror: 7444 msg->sadb_msg_errno = error; 7445 return key_sendup_mbuf(so, m, target); 7446 } 7447 7448 static int 7449 key_senderror(struct socket *so, struct mbuf *m, int code) 7450 { 7451 struct sadb_msg *msg; 7452 7453 if (m->m_len < sizeof(struct sadb_msg)) 7454 panic("invalid mbuf passed to key_senderror"); 7455 7456 msg = mtod(m, struct sadb_msg *); 7457 msg->sadb_msg_errno = code; 7458 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7459 } 7460 7461 /* 7462 * set the pointer to each header into message buffer. 7463 * m will be freed on error. 7464 * XXX larger-than-MCLBYTES extension? 7465 */ 7466 static int 7467 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7468 { 7469 struct mbuf *n; 7470 struct sadb_ext *ext; 7471 size_t off, end; 7472 int extlen; 7473 int toff; 7474 7475 /* sanity check */ 7476 if (m == NULL || mhp == NULL) 7477 panic("key_align: NULL pointer is passed"); 7478 if (m->m_len < sizeof(struct sadb_msg)) 7479 panic("invalid mbuf passed to key_align"); 7480 7481 /* initialize */ 7482 memset(mhp, 0, sizeof(*mhp)); 7483 7484 mhp->msg = mtod(m, struct sadb_msg *); 7485 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7486 7487 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7488 extlen = end; /*just in case extlen is not updated*/ 7489 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7490 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7491 if (!n) { 7492 /* m is already freed */ 7493 return ENOBUFS; 7494 } 7495 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7496 7497 /* set pointer */ 7498 switch (ext->sadb_ext_type) { 7499 case SADB_EXT_SA: 7500 case SADB_EXT_ADDRESS_SRC: 7501 case SADB_EXT_ADDRESS_DST: 7502 case SADB_EXT_ADDRESS_PROXY: 7503 case SADB_EXT_LIFETIME_CURRENT: 7504 case SADB_EXT_LIFETIME_HARD: 7505 case SADB_EXT_LIFETIME_SOFT: 7506 case SADB_EXT_KEY_AUTH: 7507 case SADB_EXT_KEY_ENCRYPT: 7508 case SADB_EXT_IDENTITY_SRC: 7509 case SADB_EXT_IDENTITY_DST: 7510 case SADB_EXT_SENSITIVITY: 7511 case SADB_EXT_PROPOSAL: 7512 case SADB_EXT_SUPPORTED_AUTH: 7513 case SADB_EXT_SUPPORTED_ENCRYPT: 7514 case SADB_EXT_SPIRANGE: 7515 case SADB_X_EXT_POLICY: 7516 case SADB_X_EXT_SA2: 7517 #ifdef IPSEC_NAT_T 7518 case SADB_X_EXT_NAT_T_TYPE: 7519 case SADB_X_EXT_NAT_T_SPORT: 7520 case SADB_X_EXT_NAT_T_DPORT: 7521 case SADB_X_EXT_NAT_T_OA: 7522 case SADB_X_EXT_NAT_T_FRAG: 7523 #endif 7524 /* duplicate check */ 7525 /* 7526 * XXX Are there duplication payloads of either 7527 * KEY_AUTH or KEY_ENCRYPT ? 7528 */ 7529 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7530 ipseclog((LOG_DEBUG, 7531 "key_align: duplicate ext_type %u " 7532 "is passed.\n", ext->sadb_ext_type)); 7533 m_freem(m); 7534 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7535 return EINVAL; 7536 } 7537 break; 7538 default: 7539 ipseclog((LOG_DEBUG, 7540 "key_align: invalid ext_type %u is passed.\n", 7541 ext->sadb_ext_type)); 7542 m_freem(m); 7543 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7544 return EINVAL; 7545 } 7546 7547 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7548 7549 if (key_validate_ext(ext, extlen)) { 7550 m_freem(m); 7551 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7552 return EINVAL; 7553 } 7554 7555 n = m_pulldown(m, off, extlen, &toff); 7556 if (!n) { 7557 /* m is already freed */ 7558 return ENOBUFS; 7559 } 7560 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7561 7562 mhp->ext[ext->sadb_ext_type] = ext; 7563 mhp->extoff[ext->sadb_ext_type] = off; 7564 mhp->extlen[ext->sadb_ext_type] = extlen; 7565 } 7566 7567 if (off != end) { 7568 m_freem(m); 7569 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7570 return EINVAL; 7571 } 7572 7573 return 0; 7574 } 7575 7576 static int 7577 key_validate_ext(const struct sadb_ext *ext, int len) 7578 { 7579 const struct sockaddr *sa; 7580 enum { NONE, ADDR } checktype = NONE; 7581 int baselen = 0; 7582 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7583 7584 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7585 return EINVAL; 7586 7587 /* if it does not match minimum/maximum length, bail */ 7588 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7589 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7590 return EINVAL; 7591 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7592 return EINVAL; 7593 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7594 return EINVAL; 7595 7596 /* more checks based on sadb_ext_type XXX need more */ 7597 switch (ext->sadb_ext_type) { 7598 case SADB_EXT_ADDRESS_SRC: 7599 case SADB_EXT_ADDRESS_DST: 7600 case SADB_EXT_ADDRESS_PROXY: 7601 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7602 checktype = ADDR; 7603 break; 7604 case SADB_EXT_IDENTITY_SRC: 7605 case SADB_EXT_IDENTITY_DST: 7606 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7607 SADB_X_IDENTTYPE_ADDR) { 7608 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7609 checktype = ADDR; 7610 } else 7611 checktype = NONE; 7612 break; 7613 default: 7614 checktype = NONE; 7615 break; 7616 } 7617 7618 switch (checktype) { 7619 case NONE: 7620 break; 7621 case ADDR: 7622 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7623 if (len < baselen + sal) 7624 return EINVAL; 7625 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7626 return EINVAL; 7627 break; 7628 } 7629 7630 return 0; 7631 } 7632 7633 static int 7634 key_do_init(void) 7635 { 7636 int i; 7637 7638 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7639 7640 callout_init(&key_timehandler_ch, 0); 7641 7642 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7643 LIST_INIT(&sptree[i]); 7644 } 7645 7646 LIST_INIT(&sahtree); 7647 7648 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7649 LIST_INIT(®tree[i]); 7650 } 7651 7652 #ifndef IPSEC_NONBLOCK_ACQUIRE 7653 LIST_INIT(&acqtree); 7654 #endif 7655 LIST_INIT(&spacqtree); 7656 7657 /* system default */ 7658 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7659 ip4_def_policy.refcnt++; /*never reclaim this*/ 7660 7661 #ifdef INET6 7662 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7663 ip6_def_policy.refcnt++; /*never reclaim this*/ 7664 #endif 7665 7666 7667 #ifndef IPSEC_DEBUG2 7668 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7669 #endif /*IPSEC_DEBUG2*/ 7670 7671 /* initialize key statistics */ 7672 keystat.getspi_count = 1; 7673 7674 printf("IPsec: Initialized Security Association Processing.\n"); 7675 7676 return (0); 7677 } 7678 7679 void 7680 key_init(void) 7681 { 7682 static ONCE_DECL(key_init_once); 7683 7684 RUN_ONCE(&key_init_once, key_do_init); 7685 } 7686 7687 /* 7688 * XXX: maybe This function is called after INBOUND IPsec processing. 7689 * 7690 * Special check for tunnel-mode packets. 7691 * We must make some checks for consistency between inner and outer IP header. 7692 * 7693 * xxx more checks to be provided 7694 */ 7695 int 7696 key_checktunnelsanity( 7697 struct secasvar *sav, 7698 u_int family, 7699 void *src, 7700 void *dst 7701 ) 7702 { 7703 /* sanity check */ 7704 if (sav->sah == NULL) 7705 panic("sav->sah == NULL at key_checktunnelsanity"); 7706 7707 /* XXX: check inner IP header */ 7708 7709 return 1; 7710 } 7711 7712 #if 0 7713 #define hostnamelen strlen(hostname) 7714 7715 /* 7716 * Get FQDN for the host. 7717 * If the administrator configured hostname (by hostname(1)) without 7718 * domain name, returns nothing. 7719 */ 7720 static const char * 7721 key_getfqdn() 7722 { 7723 int i; 7724 int hasdot; 7725 static char fqdn[MAXHOSTNAMELEN + 1]; 7726 7727 if (!hostnamelen) 7728 return NULL; 7729 7730 /* check if it comes with domain name. */ 7731 hasdot = 0; 7732 for (i = 0; i < hostnamelen; i++) { 7733 if (hostname[i] == '.') 7734 hasdot++; 7735 } 7736 if (!hasdot) 7737 return NULL; 7738 7739 /* NOTE: hostname may not be NUL-terminated. */ 7740 memset(fqdn, 0, sizeof(fqdn)); 7741 memcpy(fqdn, hostname, hostnamelen); 7742 fqdn[hostnamelen] = '\0'; 7743 return fqdn; 7744 } 7745 7746 /* 7747 * get username@FQDN for the host/user. 7748 */ 7749 static const char * 7750 key_getuserfqdn() 7751 { 7752 const char *host; 7753 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7754 struct proc *p = curproc; 7755 char *q; 7756 7757 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7758 return NULL; 7759 if (!(host = key_getfqdn())) 7760 return NULL; 7761 7762 /* NOTE: s_login may not be-NUL terminated. */ 7763 memset(userfqdn, 0, sizeof(userfqdn)); 7764 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7765 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7766 q = userfqdn + strlen(userfqdn); 7767 *q++ = '@'; 7768 memcpy(q, host, strlen(host)); 7769 q += strlen(host); 7770 *q++ = '\0'; 7771 7772 return userfqdn; 7773 } 7774 #endif 7775 7776 /* record data transfer on SA, and update timestamps */ 7777 void 7778 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7779 { 7780 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7781 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7782 if (!sav->lft_c) 7783 return; 7784 7785 /* 7786 * XXX Currently, there is a difference of bytes size 7787 * between inbound and outbound processing. 7788 */ 7789 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7790 /* to check bytes lifetime is done in key_timehandler(). */ 7791 7792 /* 7793 * We use the number of packets as the unit of 7794 * sadb_lifetime_allocations. We increment the variable 7795 * whenever {esp,ah}_{in,out}put is called. 7796 */ 7797 sav->lft_c->sadb_lifetime_allocations++; 7798 /* XXX check for expires? */ 7799 7800 /* 7801 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7802 * in seconds. HARD and SOFT lifetime are measured by the time 7803 * difference (again in seconds) from sadb_lifetime_usetime. 7804 * 7805 * usetime 7806 * v expire expire 7807 * -----+-----+--------+---> t 7808 * <--------------> HARD 7809 * <-----> SOFT 7810 */ 7811 sav->lft_c->sadb_lifetime_usetime = time_second; 7812 /* XXX check for expires? */ 7813 7814 return; 7815 } 7816 7817 /* dumb version */ 7818 void 7819 key_sa_routechange(struct sockaddr *dst) 7820 { 7821 struct secashead *sah; 7822 struct route *ro; 7823 7824 LIST_FOREACH(sah, &sahtree, chain) { 7825 ro = &sah->sa_route; 7826 if (dst->sa_len == rtcache_getdst(ro)->sa_len && 7827 memcmp(dst, rtcache_getdst(ro), dst->sa_len) == 0) 7828 rtcache_free(ro); 7829 } 7830 7831 return; 7832 } 7833 7834 static void 7835 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7836 { 7837 if (sav == NULL) 7838 panic("key_sa_chgstate called with sav == NULL"); 7839 7840 if (sav->state == state) 7841 return; 7842 7843 if (__LIST_CHAINED(sav)) 7844 LIST_REMOVE(sav, chain); 7845 7846 sav->state = state; 7847 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7848 } 7849 7850 void 7851 key_sa_stir_iv(struct secasvar *sav) 7852 { 7853 7854 if (!sav->iv) 7855 panic("key_sa_stir_iv called with sav == NULL"); 7856 key_randomfill(sav->iv, sav->ivlen); 7857 } 7858 7859 /* XXX too much? */ 7860 static struct mbuf * 7861 key_alloc_mbuf(int l) 7862 { 7863 struct mbuf *m = NULL, *n; 7864 int len, t; 7865 7866 len = l; 7867 while (len > 0) { 7868 MGET(n, M_DONTWAIT, MT_DATA); 7869 if (n && len > MLEN) 7870 MCLGET(n, M_DONTWAIT); 7871 if (!n) { 7872 m_freem(m); 7873 return NULL; 7874 } 7875 7876 n->m_next = NULL; 7877 n->m_len = 0; 7878 n->m_len = M_TRAILINGSPACE(n); 7879 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7880 if (n->m_len > len) { 7881 t = (n->m_len - len) & ~(sizeof(long) - 1); 7882 n->m_data += t; 7883 n->m_len = len; 7884 } 7885 7886 len -= n->m_len; 7887 7888 if (m) 7889 m_cat(m, n); 7890 else 7891 m = n; 7892 } 7893 7894 return m; 7895 } 7896 7897 static struct mbuf * 7898 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7899 { 7900 struct secashead *sah; 7901 struct secasvar *sav; 7902 u_int16_t proto; 7903 u_int stateidx; 7904 u_int8_t satype; 7905 u_int8_t state; 7906 int cnt; 7907 struct mbuf *m, *n; 7908 7909 /* map satype to proto */ 7910 if ((proto = key_satype2proto(req_satype)) == 0) { 7911 *errorp = EINVAL; 7912 return (NULL); 7913 } 7914 7915 /* count sav entries to be sent to the userland. */ 7916 cnt = 0; 7917 LIST_FOREACH(sah, &sahtree, chain) { 7918 if (req_satype != SADB_SATYPE_UNSPEC && 7919 proto != sah->saidx.proto) 7920 continue; 7921 7922 for (stateidx = 0; 7923 stateidx < _ARRAYLEN(saorder_state_any); 7924 stateidx++) { 7925 state = saorder_state_any[stateidx]; 7926 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7927 cnt++; 7928 } 7929 } 7930 } 7931 7932 if (cnt == 0) { 7933 *errorp = ENOENT; 7934 return (NULL); 7935 } 7936 7937 /* send this to the userland, one at a time. */ 7938 m = NULL; 7939 LIST_FOREACH(sah, &sahtree, chain) { 7940 if (req_satype != SADB_SATYPE_UNSPEC && 7941 proto != sah->saidx.proto) 7942 continue; 7943 7944 /* map proto to satype */ 7945 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7946 m_freem(m); 7947 *errorp = EINVAL; 7948 return (NULL); 7949 } 7950 7951 for (stateidx = 0; 7952 stateidx < _ARRAYLEN(saorder_state_any); 7953 stateidx++) { 7954 state = saorder_state_any[stateidx]; 7955 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7956 n = key_setdumpsa(sav, SADB_DUMP, satype, 7957 --cnt, pid); 7958 if (!n) { 7959 m_freem(m); 7960 *errorp = ENOBUFS; 7961 return (NULL); 7962 } 7963 7964 if (!m) 7965 m = n; 7966 else 7967 m_cat(m, n); 7968 } 7969 } 7970 } 7971 7972 if (!m) { 7973 *errorp = EINVAL; 7974 return (NULL); 7975 } 7976 7977 if ((m->m_flags & M_PKTHDR) != 0) { 7978 m->m_pkthdr.len = 0; 7979 for (n = m; n; n = n->m_next) 7980 m->m_pkthdr.len += n->m_len; 7981 } 7982 7983 *errorp = 0; 7984 return (m); 7985 } 7986 7987 static struct mbuf * 7988 key_setspddump(int *errorp, pid_t pid) 7989 { 7990 struct secpolicy *sp; 7991 int cnt; 7992 u_int dir; 7993 struct mbuf *m, *n; 7994 7995 /* search SPD entry and get buffer size. */ 7996 cnt = 0; 7997 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7998 LIST_FOREACH(sp, &sptree[dir], chain) { 7999 cnt++; 8000 } 8001 } 8002 8003 if (cnt == 0) { 8004 *errorp = ENOENT; 8005 return (NULL); 8006 } 8007 8008 m = NULL; 8009 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8010 LIST_FOREACH(sp, &sptree[dir], chain) { 8011 --cnt; 8012 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8013 8014 if (!n) { 8015 *errorp = ENOBUFS; 8016 m_freem(m); 8017 return (NULL); 8018 } 8019 if (!m) 8020 m = n; 8021 else { 8022 m->m_pkthdr.len += n->m_pkthdr.len; 8023 m_cat(m, n); 8024 } 8025 } 8026 } 8027 8028 *errorp = 0; 8029 return (m); 8030 } 8031 8032 static int 8033 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8034 { 8035 struct mbuf *m, *n; 8036 int err2 = 0; 8037 char *p, *ep; 8038 size_t len; 8039 int s, error; 8040 8041 if (newp) 8042 return (EPERM); 8043 if (namelen != 1) 8044 return (EINVAL); 8045 8046 s = splsoftnet(); 8047 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8048 splx(s); 8049 if (!m) 8050 return (error); 8051 if (!oldp) 8052 *oldlenp = m->m_pkthdr.len; 8053 else { 8054 p = oldp; 8055 if (*oldlenp < m->m_pkthdr.len) { 8056 err2 = ENOMEM; 8057 ep = p + *oldlenp; 8058 } else { 8059 *oldlenp = m->m_pkthdr.len; 8060 ep = p + m->m_pkthdr.len; 8061 } 8062 for (n = m; n; n = n->m_next) { 8063 len = (ep - p < n->m_len) ? 8064 ep - p : n->m_len; 8065 error = copyout(mtod(n, const void *), p, len); 8066 p += len; 8067 if (error) 8068 break; 8069 } 8070 if (error == 0) 8071 error = err2; 8072 } 8073 m_freem(m); 8074 8075 return (error); 8076 } 8077 8078 static int 8079 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8080 { 8081 struct mbuf *m, *n; 8082 int err2 = 0; 8083 char *p, *ep; 8084 size_t len; 8085 int s, error; 8086 8087 if (newp) 8088 return (EPERM); 8089 if (namelen != 0) 8090 return (EINVAL); 8091 8092 s = splsoftnet(); 8093 m = key_setspddump(&error, l->l_proc->p_pid); 8094 splx(s); 8095 if (!m) 8096 return (error); 8097 if (!oldp) 8098 *oldlenp = m->m_pkthdr.len; 8099 else { 8100 p = oldp; 8101 if (*oldlenp < m->m_pkthdr.len) { 8102 err2 = ENOMEM; 8103 ep = p + *oldlenp; 8104 } else { 8105 *oldlenp = m->m_pkthdr.len; 8106 ep = p + m->m_pkthdr.len; 8107 } 8108 for (n = m; n; n = n->m_next) { 8109 len = (ep - p < n->m_len) ? 8110 ep - p : n->m_len; 8111 error = copyout(mtod(n, const void *), p, len); 8112 p += len; 8113 if (error) 8114 break; 8115 } 8116 if (error == 0) 8117 error = err2; 8118 } 8119 m_freem(m); 8120 8121 return (error); 8122 } 8123 8124 /* 8125 * Create sysctl tree for native FAST_IPSEC key knobs, originally 8126 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8127 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8128 * and in any case the part of our sysctl namespace used for dumping the 8129 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8130 * namespace, for API reasons. 8131 * 8132 * Pending a consensus on the right way to fix this, add a level of 8133 * indirection in how we number the `native' FAST_IPSEC key nodes; 8134 * and (as requested by Andrew Brown) move registration of the 8135 * KAME-compatible names to a separate function. 8136 */ 8137 #if 0 8138 # define FAST_IPSEC_PFKEY PF_KEY_V2 8139 # define FAST_IPSEC_PFKEY_NAME "keyv2" 8140 #else 8141 # define FAST_IPSEC_PFKEY PF_KEY 8142 # define FAST_IPSEC_PFKEY_NAME "key" 8143 #endif 8144 8145 static int 8146 sysctl_net_key_stats(SYSCTLFN_ARGS) 8147 { 8148 netstat_sysctl_context ctx; 8149 uint64_t ps[PFKEY_NSTATS]; 8150 8151 ctx.ctx_stat = pfkeystat_percpu; 8152 ctx.ctx_counters = ps; 8153 ctx.ctx_ncounters = PFKEY_NSTATS; 8154 return (NETSTAT_SYSCTL(&ctx)); 8155 } 8156 8157 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 8158 { 8159 8160 sysctl_createv(clog, 0, NULL, NULL, 8161 CTLFLAG_PERMANENT, 8162 CTLTYPE_NODE, "net", NULL, 8163 NULL, 0, NULL, 0, 8164 CTL_NET, CTL_EOL); 8165 sysctl_createv(clog, 0, NULL, NULL, 8166 CTLFLAG_PERMANENT, 8167 CTLTYPE_NODE, FAST_IPSEC_PFKEY_NAME, NULL, 8168 NULL, 0, NULL, 0, 8169 CTL_NET, FAST_IPSEC_PFKEY, CTL_EOL); 8170 8171 sysctl_createv(clog, 0, NULL, NULL, 8172 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8173 CTLTYPE_INT, "debug", NULL, 8174 NULL, 0, &key_debug_level, 0, 8175 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8176 sysctl_createv(clog, 0, NULL, NULL, 8177 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8178 CTLTYPE_INT, "spi_try", NULL, 8179 NULL, 0, &key_spi_trycnt, 0, 8180 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8181 sysctl_createv(clog, 0, NULL, NULL, 8182 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8183 CTLTYPE_INT, "spi_min_value", NULL, 8184 NULL, 0, &key_spi_minval, 0, 8185 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8186 sysctl_createv(clog, 0, NULL, NULL, 8187 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8188 CTLTYPE_INT, "spi_max_value", NULL, 8189 NULL, 0, &key_spi_maxval, 0, 8190 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8191 sysctl_createv(clog, 0, NULL, NULL, 8192 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8193 CTLTYPE_INT, "random_int", NULL, 8194 NULL, 0, &key_int_random, 0, 8195 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8196 sysctl_createv(clog, 0, NULL, NULL, 8197 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8198 CTLTYPE_INT, "larval_lifetime", NULL, 8199 NULL, 0, &key_larval_lifetime, 0, 8200 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8201 sysctl_createv(clog, 0, NULL, NULL, 8202 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8203 CTLTYPE_INT, "blockacq_count", NULL, 8204 NULL, 0, &key_blockacq_count, 0, 8205 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8206 sysctl_createv(clog, 0, NULL, NULL, 8207 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8208 CTLTYPE_INT, "blockacq_lifetime", NULL, 8209 NULL, 0, &key_blockacq_lifetime, 0, 8210 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8211 sysctl_createv(clog, 0, NULL, NULL, 8212 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8213 CTLTYPE_INT, "esp_keymin", NULL, 8214 NULL, 0, &ipsec_esp_keymin, 0, 8215 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8216 sysctl_createv(clog, 0, NULL, NULL, 8217 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8218 CTLTYPE_INT, "prefered_oldsa", NULL, 8219 NULL, 0, &key_prefered_oldsa, 0, 8220 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8221 sysctl_createv(clog, 0, NULL, NULL, 8222 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8223 CTLTYPE_INT, "esp_auth", NULL, 8224 NULL, 0, &ipsec_esp_auth, 0, 8225 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8226 sysctl_createv(clog, 0, NULL, NULL, 8227 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8228 CTLTYPE_INT, "ah_keymin", NULL, 8229 NULL, 0, &ipsec_ah_keymin, 0, 8230 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8231 sysctl_createv(clog, 0, NULL, NULL, 8232 CTLFLAG_PERMANENT, 8233 CTLTYPE_STRUCT, "stats", 8234 SYSCTL_DESCR("PF_KEY statistics"), 8235 sysctl_net_key_stats, 0, NULL, 0, 8236 CTL_NET, FAST_IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8237 } 8238 8239 /* 8240 * Register sysctl names used by setkey(8). For historical reasons, 8241 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8242 * for both FAST_IPSEC and KAME IPSEC. 8243 */ 8244 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for FAST_IPSEC") 8245 { 8246 8247 /* Make sure net.key exists before we register nodes underneath it. */ 8248 sysctl_createv(clog, 0, NULL, NULL, 8249 CTLFLAG_PERMANENT, 8250 CTLTYPE_NODE, "net", NULL, 8251 NULL, 0, NULL, 0, 8252 CTL_NET, CTL_EOL); 8253 sysctl_createv(clog, 0, NULL, NULL, 8254 CTLFLAG_PERMANENT, 8255 CTLTYPE_NODE, "key", NULL, 8256 NULL, 0, NULL, 0, 8257 CTL_NET, PF_KEY, CTL_EOL); 8258 8259 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8260 sysctl_createv(clog, 0, NULL, NULL, 8261 CTLFLAG_PERMANENT, 8262 CTLTYPE_STRUCT, "dumpsa", NULL, 8263 sysctl_net_key_dumpsa, 0, NULL, 0, 8264 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8265 sysctl_createv(clog, 0, NULL, NULL, 8266 CTLFLAG_PERMANENT, 8267 CTLTYPE_STRUCT, "dumpsp", NULL, 8268 sysctl_net_key_dumpsp, 0, NULL, 0, 8269 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8270 } 8271
Indexes created Tue Sep 23 20:09:58 GMT 2025