1 /* $NetBSD: key.c,v 1.78 2012/08/30 12:16:49 drochner 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 1.78 2012/08/30 12:16:49 drochner Exp $"); 36 37 /* 38 * This code is referd to RFC 2367 39 */ 40 41 #include "opt_inet.h" 42 #ifdef __FreeBSD__ 43 #include "opt_inet6.h" 44 #endif 45 #include "opt_ipsec.h" 46 #ifdef __NetBSD__ 47 #include "opt_gateway.h" 48 #endif 49 50 #include <sys/types.h> 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/callout.h> 54 #include <sys/kernel.h> 55 #include <sys/mbuf.h> 56 #include <sys/domain.h> 57 #include <sys/protosw.h> 58 #include <sys/malloc.h> 59 #include <sys/socket.h> 60 #include <sys/socketvar.h> 61 #include <sys/sysctl.h> 62 #include <sys/errno.h> 63 #include <sys/proc.h> 64 #include <sys/queue.h> 65 #include <sys/syslog.h> 66 #include <sys/once.h> 67 #include <sys/cprng.h> 68 69 #include <net/if.h> 70 #include <net/route.h> 71 #include <net/raw_cb.h> 72 73 #include <netinet/in.h> 74 #include <netinet/in_systm.h> 75 #include <netinet/ip.h> 76 #include <netinet/in_var.h> 77 #ifdef INET 78 #include <netinet/ip_var.h> 79 #endif 80 81 #ifdef INET6 82 #include <netinet/ip6.h> 83 #include <netinet6/in6_var.h> 84 #include <netinet6/ip6_var.h> 85 #endif /* INET6 */ 86 87 #ifdef INET 88 #include <netinet/in_pcb.h> 89 #endif 90 #ifdef INET6 91 #include <netinet6/in6_pcb.h> 92 #endif /* INET6 */ 93 94 #include <net/pfkeyv2.h> 95 #include <netipsec/keydb.h> 96 #include <netipsec/key.h> 97 #include <netipsec/keysock.h> 98 #include <netipsec/key_debug.h> 99 100 #include <netipsec/ipsec.h> 101 #ifdef INET6 102 #include <netipsec/ipsec6.h> 103 #endif 104 #include <netipsec/ipsec_private.h> 105 106 #include <netipsec/xform.h> 107 #include <netipsec/ipsec_osdep.h> 108 #include <netipsec/ipcomp.h> 109 110 111 #include <net/net_osdep.h> 112 113 #define FULLMASK 0xff 114 #define _BITS(bytes) ((bytes) << 3) 115 116 percpu_t *pfkeystat_percpu; 117 118 /* 119 * Note on SA reference counting: 120 * - SAs that are not in DEAD state will have (total external reference + 1) 121 * following value in reference count field. they cannot be freed and are 122 * referenced from SA header. 123 * - SAs that are in DEAD state will have (total external reference) 124 * in reference count field. they are ready to be freed. reference from 125 * SA header will be removed in key_delsav(), when the reference count 126 * field hits 0 (= no external reference other than from SA header. 127 */ 128 129 u_int32_t key_debug_level = 0; 130 static u_int key_spi_trycnt = 1000; 131 static u_int32_t key_spi_minval = 0x100; 132 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 133 static u_int32_t policy_id = 0; 134 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 135 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 136 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 137 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 138 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 139 140 static u_int32_t acq_seq = 0; 141 142 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 143 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 144 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 145 /* registed list */ 146 #ifndef IPSEC_NONBLOCK_ACQUIRE 147 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 148 #endif 149 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 150 151 /* search order for SAs */ 152 /* 153 * This order is important because we must select the oldest SA 154 * for outbound processing. For inbound, This is not important. 155 */ 156 static const u_int saorder_state_valid_prefer_old[] = { 157 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 158 }; 159 static const u_int saorder_state_valid_prefer_new[] = { 160 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 161 }; 162 163 static const u_int saorder_state_alive[] = { 164 /* except DEAD */ 165 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 166 }; 167 static const u_int saorder_state_any[] = { 168 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 169 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 170 }; 171 172 static const int minsize[] = { 173 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 174 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 175 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 176 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 177 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 178 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 179 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 180 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 181 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 182 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 183 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 184 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 185 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 186 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 187 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 188 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 189 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 190 0, /* SADB_X_EXT_KMPRIVATE */ 191 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 192 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 193 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 194 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 195 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 196 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 197 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 198 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 199 }; 200 static const int maxsize[] = { 201 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 202 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 203 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 204 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 205 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 206 0, /* SADB_EXT_ADDRESS_SRC */ 207 0, /* SADB_EXT_ADDRESS_DST */ 208 0, /* SADB_EXT_ADDRESS_PROXY */ 209 0, /* SADB_EXT_KEY_AUTH */ 210 0, /* SADB_EXT_KEY_ENCRYPT */ 211 0, /* SADB_EXT_IDENTITY_SRC */ 212 0, /* SADB_EXT_IDENTITY_DST */ 213 0, /* SADB_EXT_SENSITIVITY */ 214 0, /* SADB_EXT_PROPOSAL */ 215 0, /* SADB_EXT_SUPPORTED_AUTH */ 216 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 217 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 218 0, /* SADB_X_EXT_KMPRIVATE */ 219 0, /* SADB_X_EXT_POLICY */ 220 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 221 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 222 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 223 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 224 0, /* SADB_X_EXT_NAT_T_OAI */ 225 0, /* SADB_X_EXT_NAT_T_OAR */ 226 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 227 }; 228 229 static int ipsec_esp_keymin = 256; 230 static int ipsec_esp_auth = 0; 231 static int ipsec_ah_keymin = 128; 232 233 #ifdef SYSCTL_DECL 234 SYSCTL_DECL(_net_key); 235 #endif 236 237 #ifdef SYSCTL_INT 238 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 239 &key_debug_level, 0, ""); 240 241 /* max count of trial for the decision of spi value */ 242 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 243 &key_spi_trycnt, 0, ""); 244 245 /* minimum spi value to allocate automatically. */ 246 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 247 &key_spi_minval, 0, ""); 248 249 /* maximun spi value to allocate automatically. */ 250 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 251 &key_spi_maxval, 0, ""); 252 253 /* interval to initialize randseed */ 254 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 255 &key_int_random, 0, ""); 256 257 /* lifetime for larval SA */ 258 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 259 &key_larval_lifetime, 0, ""); 260 261 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 262 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 263 &key_blockacq_count, 0, ""); 264 265 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 266 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 267 &key_blockacq_lifetime, 0, ""); 268 269 /* ESP auth */ 270 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 271 &ipsec_esp_auth, 0, ""); 272 273 /* minimum ESP key length */ 274 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 275 &ipsec_esp_keymin, 0, ""); 276 277 /* minimum AH key length */ 278 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 279 &ipsec_ah_keymin, 0, ""); 280 281 /* perfered old SA rather than new SA */ 282 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 283 &key_prefered_oldsa, 0, ""); 284 #endif /* SYSCTL_INT */ 285 286 #ifndef LIST_FOREACH 287 #define LIST_FOREACH(elm, head, field) \ 288 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field)) 289 #endif 290 #define __LIST_CHAINED(elm) \ 291 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 292 #define LIST_INSERT_TAIL(head, elm, type, field) \ 293 do {\ 294 struct type *curelm = LIST_FIRST(head); \ 295 if (curelm == NULL) {\ 296 LIST_INSERT_HEAD(head, elm, field); \ 297 } else { \ 298 while (LIST_NEXT(curelm, field)) \ 299 curelm = LIST_NEXT(curelm, field);\ 300 LIST_INSERT_AFTER(curelm, elm, field);\ 301 }\ 302 } while (0) 303 304 #define KEY_CHKSASTATE(head, sav, name) \ 305 /* do */ { \ 306 if ((head) != (sav)) { \ 307 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 308 (name), (head), (sav))); \ 309 continue; \ 310 } \ 311 } /* while (0) */ 312 313 #define KEY_CHKSPDIR(head, sp, name) \ 314 do { \ 315 if ((head) != (sp)) { \ 316 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 317 "anyway continue.\n", \ 318 (name), (head), (sp))); \ 319 } \ 320 } while (0) 321 322 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management"); 323 324 #if 1 325 #define KMALLOC(p, t, n) \ 326 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT)) 327 #define KFREE(p) \ 328 free((p), M_SECA) 329 #else 330 #define KMALLOC(p, t, n) \ 331 do { \ 332 ((p) = (t)malloc((unsigned long)(n), M_SECA, M_NOWAIT)); \ 333 printf("%s %d: %p <- KMALLOC(%s, %d)\n", \ 334 __FILE__, __LINE__, (p), #t, n); \ 335 } while (0) 336 337 #define KFREE(p) \ 338 do { \ 339 printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \ 340 free((p), M_SECA); \ 341 } while (0) 342 #endif 343 344 /* 345 * set parameters into secpolicyindex buffer. 346 * Must allocate secpolicyindex buffer passed to this function. 347 */ 348 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 349 do { \ 350 memset((idx), 0, sizeof(struct secpolicyindex)); \ 351 (idx)->dir = (_dir); \ 352 (idx)->prefs = (ps); \ 353 (idx)->prefd = (pd); \ 354 (idx)->ul_proto = (ulp); \ 355 memcpy(&(idx)->src, (s), ((const struct sockaddr *)(s))->sa_len); \ 356 memcpy(&(idx)->dst, (d), ((const struct sockaddr *)(d))->sa_len); \ 357 } while (0) 358 359 /* 360 * set parameters into secasindex buffer. 361 * Must allocate secasindex buffer before calling this function. 362 */ 363 static int 364 key_setsecasidx (int, int, int, const struct sadb_address *, 365 const struct sadb_address *, struct secasindex *); 366 367 /* key statistics */ 368 struct _keystat { 369 u_long getspi_count; /* the avarage of count to try to get new SPI */ 370 } keystat; 371 372 struct sadb_msghdr { 373 struct sadb_msg *msg; 374 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 375 int extoff[SADB_EXT_MAX + 1]; 376 int extlen[SADB_EXT_MAX + 1]; 377 }; 378 379 static struct secasvar *key_allocsa_policy (const struct secasindex *); 380 static void key_freesp_so (struct secpolicy **); 381 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int); 382 static void key_delsp (struct secpolicy *); 383 static struct secpolicy *key_getsp (const struct secpolicyindex *); 384 static struct secpolicy *key_getspbyid (u_int32_t); 385 static u_int16_t key_newreqid (void); 386 static struct mbuf *key_gather_mbuf (struct mbuf *, 387 const struct sadb_msghdr *, int, int, ...); 388 static int key_spdadd (struct socket *, struct mbuf *, 389 const struct sadb_msghdr *); 390 static u_int32_t key_getnewspid (void); 391 static int key_spddelete (struct socket *, struct mbuf *, 392 const struct sadb_msghdr *); 393 static int key_spddelete2 (struct socket *, struct mbuf *, 394 const struct sadb_msghdr *); 395 static int key_spdget (struct socket *, struct mbuf *, 396 const struct sadb_msghdr *); 397 static int key_spdflush (struct socket *, struct mbuf *, 398 const struct sadb_msghdr *); 399 static int key_spddump (struct socket *, struct mbuf *, 400 const struct sadb_msghdr *); 401 static struct mbuf * key_setspddump (int *errorp, pid_t); 402 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 403 #ifdef IPSEC_NAT_T 404 static int key_nat_map (struct socket *, struct mbuf *, 405 const struct sadb_msghdr *); 406 #endif 407 static struct mbuf *key_setdumpsp (struct secpolicy *, 408 u_int8_t, u_int32_t, pid_t); 409 static u_int key_getspreqmsglen (const struct secpolicy *); 410 static int key_spdexpire (struct secpolicy *); 411 static struct secashead *key_newsah (const struct secasindex *); 412 static void key_delsah (struct secashead *); 413 static struct secasvar *key_newsav (struct mbuf *, 414 const struct sadb_msghdr *, struct secashead *, int *, 415 const char*, int); 416 #define KEY_NEWSAV(m, sadb, sah, e) \ 417 key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 418 static void key_delsav (struct secasvar *); 419 static struct secashead *key_getsah (const struct secasindex *); 420 static struct secasvar *key_checkspidup (const struct secasindex *, u_int32_t); 421 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 422 static int key_setsaval (struct secasvar *, struct mbuf *, 423 const struct sadb_msghdr *); 424 static int key_mature (struct secasvar *); 425 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 426 u_int8_t, u_int32_t, u_int32_t); 427 #ifdef IPSEC_NAT_T 428 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 429 static struct mbuf *key_setsadbxtype (u_int16_t); 430 static struct mbuf *key_setsadbxfrag (u_int16_t); 431 #endif 432 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 433 static int key_checksalen (const union sockaddr_union *); 434 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 435 u_int32_t, pid_t, u_int16_t); 436 static struct mbuf *key_setsadbsa (struct secasvar *); 437 static struct mbuf *key_setsadbaddr (u_int16_t, 438 const struct sockaddr *, u_int8_t, u_int16_t); 439 #if 0 440 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 441 int, u_int64_t); 442 #endif 443 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 444 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 445 u_int32_t); 446 static void *key_newbuf (const void *, u_int); 447 #ifdef INET6 448 static int key_ismyaddr6 (const struct sockaddr_in6 *); 449 #endif 450 451 /* flags for key_cmpsaidx() */ 452 #define CMP_HEAD 1 /* protocol, addresses. */ 453 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 454 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 455 #define CMP_EXACTLY 4 /* all elements. */ 456 static int key_cmpsaidx 457 (const struct secasindex *, const struct secasindex *, int); 458 459 static int key_sockaddrcmp (const struct sockaddr *, const struct sockaddr *, int); 460 static int key_bbcmp (const void *, const void *, u_int); 461 static u_int16_t key_satype2proto (u_int8_t); 462 static u_int8_t key_proto2satype (u_int16_t); 463 464 static int key_getspi (struct socket *, struct mbuf *, 465 const struct sadb_msghdr *); 466 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 467 const struct secasindex *); 468 #ifdef IPSEC_NAT_T 469 static int key_handle_natt_info (struct secasvar *, 470 const struct sadb_msghdr *); 471 static int key_set_natt_ports (union sockaddr_union *, 472 union sockaddr_union *, 473 const struct sadb_msghdr *); 474 #endif 475 static int key_update (struct socket *, struct mbuf *, 476 const struct sadb_msghdr *); 477 #ifdef IPSEC_DOSEQCHECK 478 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 479 #endif 480 static int key_add (struct socket *, struct mbuf *, 481 const struct sadb_msghdr *); 482 static int key_setident (struct secashead *, struct mbuf *, 483 const struct sadb_msghdr *); 484 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 485 const struct sadb_msghdr *); 486 static int key_delete (struct socket *, struct mbuf *, 487 const struct sadb_msghdr *); 488 static int key_get (struct socket *, struct mbuf *, 489 const struct sadb_msghdr *); 490 491 static void key_getcomb_setlifetime (struct sadb_comb *); 492 static struct mbuf *key_getcomb_esp (void); 493 static struct mbuf *key_getcomb_ah (void); 494 static struct mbuf *key_getcomb_ipcomp (void); 495 static struct mbuf *key_getprop (const struct secasindex *); 496 497 static int key_acquire (const struct secasindex *, struct secpolicy *); 498 #ifndef IPSEC_NONBLOCK_ACQUIRE 499 static struct secacq *key_newacq (const struct secasindex *); 500 static struct secacq *key_getacq (const struct secasindex *); 501 static struct secacq *key_getacqbyseq (u_int32_t); 502 #endif 503 static struct secspacq *key_newspacq (const struct secpolicyindex *); 504 static struct secspacq *key_getspacq (const struct secpolicyindex *); 505 static int key_acquire2 (struct socket *, struct mbuf *, 506 const struct sadb_msghdr *); 507 static int key_register (struct socket *, struct mbuf *, 508 const struct sadb_msghdr *); 509 static int key_expire (struct secasvar *); 510 static int key_flush (struct socket *, struct mbuf *, 511 const struct sadb_msghdr *); 512 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 513 int *lenp, pid_t pid); 514 static int key_dump (struct socket *, struct mbuf *, 515 const struct sadb_msghdr *); 516 static int key_promisc (struct socket *, struct mbuf *, 517 const struct sadb_msghdr *); 518 static int key_senderror (struct socket *, struct mbuf *, int); 519 static int key_validate_ext (const struct sadb_ext *, int); 520 static int key_align (struct mbuf *, struct sadb_msghdr *); 521 #if 0 522 static const char *key_getfqdn (void); 523 static const char *key_getuserfqdn (void); 524 #endif 525 static void key_sa_chgstate (struct secasvar *, u_int8_t); 526 static inline void key_sp_dead (struct secpolicy *); 527 static void key_sp_unlink (struct secpolicy *sp); 528 529 static struct mbuf *key_alloc_mbuf (int); 530 struct callout key_timehandler_ch; 531 532 #define SA_ADDREF(p) do { \ 533 (p)->refcnt++; \ 534 IPSEC_ASSERT((p)->refcnt != 0, \ 535 ("SA refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 536 } while (0) 537 #define SA_DELREF(p) do { \ 538 IPSEC_ASSERT((p)->refcnt > 0, \ 539 ("SA refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 540 (p)->refcnt--; \ 541 } while (0) 542 543 #define SP_ADDREF(p) do { \ 544 (p)->refcnt++; \ 545 IPSEC_ASSERT((p)->refcnt != 0, \ 546 ("SP refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 547 } while (0) 548 #define SP_DELREF(p) do { \ 549 IPSEC_ASSERT((p)->refcnt > 0, \ 550 ("SP refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 551 (p)->refcnt--; \ 552 } while (0) 553 554 555 static inline void 556 key_sp_dead(struct secpolicy *sp) 557 { 558 559 /* mark the SP dead */ 560 sp->state = IPSEC_SPSTATE_DEAD; 561 } 562 563 static void 564 key_sp_unlink(struct secpolicy *sp) 565 { 566 567 /* remove from SP index */ 568 if (__LIST_CHAINED(sp)) { 569 LIST_REMOVE(sp, chain); 570 /* Release refcount held just for being on chain */ 571 KEY_FREESP(&sp); 572 } 573 } 574 575 576 /* 577 * Return 0 when there are known to be no SP's for the specified 578 * direction. Otherwise return 1. This is used by IPsec code 579 * to optimize performance. 580 */ 581 int 582 key_havesp(u_int dir) 583 { 584 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 585 LIST_FIRST(&sptree[dir]) != NULL : 1); 586 } 587 588 /* %%% IPsec policy management */ 589 /* 590 * allocating a SP for OUTBOUND or INBOUND packet. 591 * Must call key_freesp() later. 592 * OUT: NULL: not found 593 * others: found and return the pointer. 594 */ 595 struct secpolicy * 596 key_allocsp(const struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 597 { 598 struct secpolicy *sp; 599 int s; 600 601 IPSEC_ASSERT(spidx != NULL, ("key_allocsp: null spidx")); 602 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 603 ("key_allocsp: invalid direction %u", dir)); 604 605 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 606 printf("DP key_allocsp from %s:%u\n", where, tag)); 607 608 /* get a SP entry */ 609 s = splsoftnet(); /*called from softclock()*/ 610 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 611 printf("*** objects\n"); 612 kdebug_secpolicyindex(spidx)); 613 614 LIST_FOREACH(sp, &sptree[dir], chain) { 615 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 616 printf("*** in SPD\n"); 617 kdebug_secpolicyindex(&sp->spidx)); 618 619 if (sp->state == IPSEC_SPSTATE_DEAD) 620 continue; 621 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 622 goto found; 623 } 624 sp = NULL; 625 found: 626 if (sp) { 627 /* sanity check */ 628 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp"); 629 630 /* found a SPD entry */ 631 sp->lastused = time_uptime; 632 SP_ADDREF(sp); 633 } 634 splx(s); 635 636 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 637 printf("DP key_allocsp return SP:%p (ID=%u) refcnt %u\n", 638 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 639 return sp; 640 } 641 642 /* 643 * allocating a SP for OUTBOUND or INBOUND packet. 644 * Must call key_freesp() later. 645 * OUT: NULL: not found 646 * others: found and return the pointer. 647 */ 648 struct secpolicy * 649 key_allocsp2(u_int32_t spi, 650 const union sockaddr_union *dst, 651 u_int8_t proto, 652 u_int dir, 653 const char* where, int tag) 654 { 655 struct secpolicy *sp; 656 int s; 657 658 IPSEC_ASSERT(dst != NULL, ("key_allocsp2: null dst")); 659 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 660 ("key_allocsp2: invalid direction %u", dir)); 661 662 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 663 printf("DP key_allocsp2 from %s:%u\n", where, tag)); 664 665 /* get a SP entry */ 666 s = splsoftnet(); /*called from softclock()*/ 667 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 668 printf("*** objects\n"); 669 printf("spi %u proto %u dir %u\n", spi, proto, dir); 670 kdebug_sockaddr(&dst->sa)); 671 672 LIST_FOREACH(sp, &sptree[dir], chain) { 673 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 674 printf("*** in SPD\n"); 675 kdebug_secpolicyindex(&sp->spidx)); 676 677 if (sp->state == IPSEC_SPSTATE_DEAD) 678 continue; 679 /* compare simple values, then dst address */ 680 if (sp->spidx.ul_proto != proto) 681 continue; 682 /* NB: spi's must exist and match */ 683 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 684 continue; 685 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 686 goto found; 687 } 688 sp = NULL; 689 found: 690 if (sp) { 691 /* sanity check */ 692 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2"); 693 694 /* found a SPD entry */ 695 sp->lastused = time_uptime; 696 SP_ADDREF(sp); 697 } 698 splx(s); 699 700 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 701 printf("DP key_allocsp2 return SP:%p (ID=%u) refcnt %u\n", 702 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 703 return sp; 704 } 705 706 /* 707 * return a policy that matches this particular inbound packet. 708 * XXX slow 709 */ 710 struct secpolicy * 711 key_gettunnel(const struct sockaddr *osrc, 712 const struct sockaddr *odst, 713 const struct sockaddr *isrc, 714 const struct sockaddr *idst, 715 const char* where, int tag) 716 { 717 struct secpolicy *sp; 718 const int dir = IPSEC_DIR_INBOUND; 719 int s; 720 struct ipsecrequest *r1, *r2, *p; 721 struct secpolicyindex spidx; 722 723 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 724 printf("DP key_gettunnel from %s:%u\n", where, tag)); 725 726 if (isrc->sa_family != idst->sa_family) { 727 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.", 728 isrc->sa_family, idst->sa_family)); 729 sp = NULL; 730 goto done; 731 } 732 733 s = splsoftnet(); /*called from softclock()*/ 734 LIST_FOREACH(sp, &sptree[dir], chain) { 735 if (sp->state == IPSEC_SPSTATE_DEAD) 736 continue; 737 738 r1 = r2 = NULL; 739 for (p = sp->req; p; p = p->next) { 740 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 741 continue; 742 743 r1 = r2; 744 r2 = p; 745 746 if (!r1) { 747 /* here we look at address matches only */ 748 spidx = sp->spidx; 749 if (isrc->sa_len > sizeof(spidx.src) || 750 idst->sa_len > sizeof(spidx.dst)) 751 continue; 752 memcpy(&spidx.src, isrc, isrc->sa_len); 753 memcpy(&spidx.dst, idst, idst->sa_len); 754 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 755 continue; 756 } else { 757 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 758 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 759 continue; 760 } 761 762 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 763 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 764 continue; 765 766 goto found; 767 } 768 } 769 sp = NULL; 770 found: 771 if (sp) { 772 sp->lastused = time_uptime; 773 SP_ADDREF(sp); 774 } 775 splx(s); 776 done: 777 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 778 printf("DP key_gettunnel return SP:%p (ID=%u) refcnt %u\n", 779 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 780 return sp; 781 } 782 783 /* 784 * allocating an SA entry for an *OUTBOUND* packet. 785 * checking each request entries in SP, and acquire an SA if need. 786 * OUT: 0: there are valid requests. 787 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 788 */ 789 int 790 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 791 { 792 u_int level; 793 int error; 794 795 IPSEC_ASSERT(isr != NULL, ("key_checkrequest: null isr")); 796 IPSEC_ASSERT(saidx != NULL, ("key_checkrequest: null saidx")); 797 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 798 saidx->mode == IPSEC_MODE_TUNNEL, 799 ("key_checkrequest: unexpected policy %u", saidx->mode)); 800 801 /* get current level */ 802 level = ipsec_get_reqlevel(isr); 803 804 /* 805 * XXX guard against protocol callbacks from the crypto 806 * thread as they reference ipsecrequest.sav which we 807 * temporarily null out below. Need to rethink how we 808 * handle bundled SA's in the callback thread. 809 */ 810 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 811 #if 0 812 /* 813 * We do allocate new SA only if the state of SA in the holder is 814 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 815 */ 816 if (isr->sav != NULL) { 817 if (isr->sav->sah == NULL) 818 panic("key_checkrequest: sah is null"); 819 if (isr->sav == (struct secasvar *)LIST_FIRST( 820 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 821 KEY_FREESAV(&isr->sav); 822 isr->sav = NULL; 823 } 824 } 825 #else 826 /* 827 * we free any SA stashed in the IPsec request because a different 828 * SA may be involved each time this request is checked, either 829 * because new SAs are being configured, or this request is 830 * associated with an unconnected datagram socket, or this request 831 * is associated with a system default policy. 832 * 833 * The operation may have negative impact to performance. We may 834 * want to check cached SA carefully, rather than picking new SA 835 * every time. 836 */ 837 if (isr->sav != NULL) { 838 KEY_FREESAV(&isr->sav); 839 isr->sav = NULL; 840 } 841 #endif 842 843 /* 844 * new SA allocation if no SA found. 845 * key_allocsa_policy should allocate the oldest SA available. 846 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 847 */ 848 if (isr->sav == NULL) 849 isr->sav = key_allocsa_policy(saidx); 850 851 /* When there is SA. */ 852 if (isr->sav != NULL) { 853 if (isr->sav->state != SADB_SASTATE_MATURE && 854 isr->sav->state != SADB_SASTATE_DYING) 855 return EINVAL; 856 return 0; 857 } 858 859 /* there is no SA */ 860 error = key_acquire(saidx, isr->sp); 861 if (error != 0) { 862 /* XXX What should I do ? */ 863 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " 864 "from key_acquire.\n", error)); 865 return error; 866 } 867 868 if (level != IPSEC_LEVEL_REQUIRE) { 869 /* XXX sigh, the interface to this routine is botched */ 870 IPSEC_ASSERT(isr->sav == NULL, ("key_checkrequest: unexpected SA")); 871 return 0; 872 } else { 873 return ENOENT; 874 } 875 } 876 877 /* 878 * allocating a SA for policy entry from SAD. 879 * NOTE: searching SAD of aliving state. 880 * OUT: NULL: not found. 881 * others: found and return the pointer. 882 */ 883 static struct secasvar * 884 key_allocsa_policy(const struct secasindex *saidx) 885 { 886 struct secashead *sah; 887 struct secasvar *sav; 888 u_int stateidx, state; 889 const u_int *saorder_state_valid; 890 int arraysize; 891 892 LIST_FOREACH(sah, &sahtree, chain) { 893 if (sah->state == SADB_SASTATE_DEAD) 894 continue; 895 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) 896 goto found; 897 } 898 899 return NULL; 900 901 found: 902 903 /* 904 * search a valid state list for outbound packet. 905 * This search order is important. 906 */ 907 if (key_prefered_oldsa) { 908 saorder_state_valid = saorder_state_valid_prefer_old; 909 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 910 } else { 911 saorder_state_valid = saorder_state_valid_prefer_new; 912 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 913 } 914 915 /* search valid state */ 916 for (stateidx = 0; 917 stateidx < arraysize; 918 stateidx++) { 919 920 state = saorder_state_valid[stateidx]; 921 922 sav = key_do_allocsa_policy(sah, state); 923 if (sav != NULL) 924 return sav; 925 } 926 927 return NULL; 928 } 929 930 /* 931 * searching SAD with direction, protocol, mode and state. 932 * called by key_allocsa_policy(). 933 * OUT: 934 * NULL : not found 935 * others : found, pointer to a SA. 936 */ 937 static struct secasvar * 938 key_do_allocsa_policy(struct secashead *sah, u_int state) 939 { 940 struct secasvar *sav, *nextsav, *candidate, *d; 941 942 /* initilize */ 943 candidate = NULL; 944 945 for (sav = LIST_FIRST(&sah->savtree[state]); 946 sav != NULL; 947 sav = nextsav) { 948 949 nextsav = LIST_NEXT(sav, chain); 950 951 /* sanity check */ 952 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy"); 953 954 /* initialize */ 955 if (candidate == NULL) { 956 candidate = sav; 957 continue; 958 } 959 960 /* Which SA is the better ? */ 961 962 /* sanity check 2 */ 963 if (candidate->lft_c == NULL || sav->lft_c == NULL) 964 panic("key_do_allocsa_policy: " 965 "lifetime_current is NULL"); 966 967 /* What the best method is to compare ? */ 968 if (key_prefered_oldsa) { 969 if (candidate->lft_c->sadb_lifetime_addtime > 970 sav->lft_c->sadb_lifetime_addtime) { 971 candidate = sav; 972 } 973 continue; 974 /*NOTREACHED*/ 975 } 976 977 /* prefered new sa rather than old sa */ 978 if (candidate->lft_c->sadb_lifetime_addtime < 979 sav->lft_c->sadb_lifetime_addtime) { 980 d = candidate; 981 candidate = sav; 982 } else 983 d = sav; 984 985 /* 986 * prepared to delete the SA when there is more 987 * suitable candidate and the lifetime of the SA is not 988 * permanent. 989 */ 990 if (d->lft_c->sadb_lifetime_addtime != 0) { 991 struct mbuf *m, *result = 0; 992 uint8_t satype; 993 994 key_sa_chgstate(d, SADB_SASTATE_DEAD); 995 996 IPSEC_ASSERT(d->refcnt > 0, 997 ("key_do_allocsa_policy: bogus ref count")); 998 999 satype = key_proto2satype(d->sah->saidx.proto); 1000 if (satype == 0) 1001 goto msgfail; 1002 1003 m = key_setsadbmsg(SADB_DELETE, 0, 1004 satype, 0, 0, d->refcnt - 1); 1005 if (!m) 1006 goto msgfail; 1007 result = m; 1008 1009 /* set sadb_address for saidx's. */ 1010 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1011 &d->sah->saidx.src.sa, 1012 d->sah->saidx.src.sa.sa_len << 3, 1013 IPSEC_ULPROTO_ANY); 1014 if (!m) 1015 goto msgfail; 1016 m_cat(result, m); 1017 1018 /* set sadb_address for saidx's. */ 1019 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1020 &d->sah->saidx.src.sa, 1021 d->sah->saidx.src.sa.sa_len << 3, 1022 IPSEC_ULPROTO_ANY); 1023 if (!m) 1024 goto msgfail; 1025 m_cat(result, m); 1026 1027 /* create SA extension */ 1028 m = key_setsadbsa(d); 1029 if (!m) 1030 goto msgfail; 1031 m_cat(result, m); 1032 1033 if (result->m_len < sizeof(struct sadb_msg)) { 1034 result = m_pullup(result, 1035 sizeof(struct sadb_msg)); 1036 if (result == NULL) 1037 goto msgfail; 1038 } 1039 1040 result->m_pkthdr.len = 0; 1041 for (m = result; m; m = m->m_next) 1042 result->m_pkthdr.len += m->m_len; 1043 mtod(result, struct sadb_msg *)->sadb_msg_len = 1044 PFKEY_UNIT64(result->m_pkthdr.len); 1045 1046 key_sendup_mbuf(NULL, result, 1047 KEY_SENDUP_REGISTERED); 1048 result = 0; 1049 msgfail: 1050 if (result) 1051 m_freem(result); 1052 KEY_FREESAV(&d); 1053 } 1054 } 1055 1056 if (candidate) { 1057 SA_ADDREF(candidate); 1058 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1059 printf("DP allocsa_policy cause " 1060 "refcnt++:%d SA:%p\n", 1061 candidate->refcnt, candidate)); 1062 } 1063 return candidate; 1064 } 1065 1066 /* 1067 * allocating a usable SA entry for a *INBOUND* packet. 1068 * Must call key_freesav() later. 1069 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1070 * NULL: not found, or error occurred. 1071 * 1072 * In the comparison, no source address is used--for RFC2401 conformance. 1073 * To quote, from section 4.1: 1074 * A security association is uniquely identified by a triple consisting 1075 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1076 * security protocol (AH or ESP) identifier. 1077 * Note that, however, we do need to keep source address in IPsec SA. 1078 * IKE specification and PF_KEY specification do assume that we 1079 * keep source address in IPsec SA. We see a tricky situation here. 1080 * 1081 * sport and dport are used for NAT-T. network order is always used. 1082 */ 1083 struct secasvar * 1084 key_allocsa( 1085 const union sockaddr_union *dst, 1086 u_int proto, 1087 u_int32_t spi, 1088 u_int16_t sport, 1089 u_int16_t dport, 1090 const char* where, int tag) 1091 { 1092 struct secashead *sah; 1093 struct secasvar *sav; 1094 u_int stateidx, state; 1095 const u_int *saorder_state_valid; 1096 int arraysize; 1097 int s; 1098 int chkport = 0; 1099 1100 int must_check_spi = 1; 1101 int must_check_alg = 0; 1102 u_int16_t cpi = 0; 1103 u_int8_t algo = 0; 1104 1105 #ifdef IPSEC_NAT_T 1106 if ((sport != 0) && (dport != 0)) 1107 chkport = 1; 1108 #endif 1109 1110 IPSEC_ASSERT(dst != NULL, ("key_allocsa: null dst address")); 1111 1112 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1113 printf("DP key_allocsa from %s:%u\n", where, tag)); 1114 1115 /* 1116 * XXX IPCOMP case 1117 * We use cpi to define spi here. In the case where cpi <= 1118 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1119 * the real spi. In this case, don't check the spi but check the 1120 * algorithm 1121 */ 1122 1123 if (proto == IPPROTO_IPCOMP) { 1124 u_int32_t tmp; 1125 tmp = ntohl(spi); 1126 cpi = (u_int16_t) tmp; 1127 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1128 algo = (u_int8_t) cpi; 1129 must_check_spi = 0; 1130 must_check_alg = 1; 1131 } 1132 } 1133 1134 /* 1135 * searching SAD. 1136 * XXX: to be checked internal IP header somewhere. Also when 1137 * IPsec tunnel packet is received. But ESP tunnel mode is 1138 * encrypted so we can't check internal IP header. 1139 */ 1140 s = splsoftnet(); /*called from softclock()*/ 1141 if (key_prefered_oldsa) { 1142 saorder_state_valid = saorder_state_valid_prefer_old; 1143 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1144 } else { 1145 saorder_state_valid = saorder_state_valid_prefer_new; 1146 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1147 } 1148 LIST_FOREACH(sah, &sahtree, chain) { 1149 /* search valid state */ 1150 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1151 state = saorder_state_valid[stateidx]; 1152 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1153 /* sanity check */ 1154 KEY_CHKSASTATE(sav->state, state, "key_allocsav"); 1155 /* do not return entries w/ unusable state */ 1156 if (sav->state != SADB_SASTATE_MATURE && 1157 sav->state != SADB_SASTATE_DYING) 1158 continue; 1159 if (proto != sav->sah->saidx.proto) 1160 continue; 1161 if (must_check_spi && spi != sav->spi) 1162 continue; 1163 /* XXX only on the ipcomp case */ 1164 if (must_check_alg && algo != sav->alg_comp) 1165 continue; 1166 1167 #if 0 /* don't check src */ 1168 /* Fix port in src->sa */ 1169 1170 /* check src address */ 1171 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0) 1172 continue; 1173 #endif 1174 /* fix port of dst address XXX*/ 1175 key_porttosaddr(__UNCONST(dst), dport); 1176 /* check dst address */ 1177 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1178 continue; 1179 SA_ADDREF(sav); 1180 goto done; 1181 } 1182 } 1183 } 1184 sav = NULL; 1185 done: 1186 splx(s); 1187 1188 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1189 printf("DP key_allocsa return SA:%p; refcnt %u\n", 1190 sav, sav ? sav->refcnt : 0)); 1191 return sav; 1192 } 1193 1194 /* 1195 * Must be called after calling key_allocsp(). 1196 * For both the packet without socket and key_freeso(). 1197 */ 1198 void 1199 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1200 { 1201 struct secpolicy *sp = *spp; 1202 1203 IPSEC_ASSERT(sp != NULL, ("key_freesp: null sp")); 1204 1205 SP_DELREF(sp); 1206 1207 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1208 printf("DP key_freesp SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1209 sp, sp->id, where, tag, sp->refcnt)); 1210 1211 if (sp->refcnt == 0) { 1212 *spp = NULL; 1213 key_delsp(sp); 1214 } 1215 } 1216 1217 /* 1218 * Must be called after calling key_allocsp(). 1219 * For the packet with socket. 1220 */ 1221 void 1222 key_freeso(struct socket *so) 1223 { 1224 /* sanity check */ 1225 IPSEC_ASSERT(so != NULL, ("key_freeso: null so")); 1226 1227 switch (so->so_proto->pr_domain->dom_family) { 1228 #ifdef INET 1229 case PF_INET: 1230 { 1231 struct inpcb *pcb = sotoinpcb(so); 1232 1233 /* Does it have a PCB ? */ 1234 if (pcb == NULL) 1235 return; 1236 key_freesp_so(&pcb->inp_sp->sp_in); 1237 key_freesp_so(&pcb->inp_sp->sp_out); 1238 } 1239 break; 1240 #endif 1241 #ifdef INET6 1242 case PF_INET6: 1243 { 1244 #ifdef HAVE_NRL_INPCB 1245 struct inpcb *pcb = sotoinpcb(so); 1246 1247 /* Does it have a PCB ? */ 1248 if (pcb == NULL) 1249 return; 1250 key_freesp_so(&pcb->inp_sp->sp_in); 1251 key_freesp_so(&pcb->inp_sp->sp_out); 1252 #else 1253 struct in6pcb *pcb = sotoin6pcb(so); 1254 1255 /* Does it have a PCB ? */ 1256 if (pcb == NULL) 1257 return; 1258 key_freesp_so(&pcb->in6p_sp->sp_in); 1259 key_freesp_so(&pcb->in6p_sp->sp_out); 1260 #endif 1261 } 1262 break; 1263 #endif /* INET6 */ 1264 default: 1265 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1266 so->so_proto->pr_domain->dom_family)); 1267 return; 1268 } 1269 } 1270 1271 static void 1272 key_freesp_so(struct secpolicy **sp) 1273 { 1274 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp")); 1275 1276 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1277 (*sp)->policy == IPSEC_POLICY_BYPASS) 1278 return; 1279 1280 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1281 ("key_freesp_so: invalid policy %u", (*sp)->policy)); 1282 KEY_FREESP(sp); 1283 } 1284 1285 /* 1286 * Must be called after calling key_allocsa(). 1287 * This function is called by key_freesp() to free some SA allocated 1288 * for a policy. 1289 */ 1290 void 1291 key_freesav(struct secasvar **psav, const char* where, int tag) 1292 { 1293 struct secasvar *sav = *psav; 1294 1295 IPSEC_ASSERT(sav != NULL, ("key_freesav: null sav")); 1296 1297 SA_DELREF(sav); 1298 1299 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1300 printf("DP key_freesav SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1301 sav, (u_long)ntohl(sav->spi), 1302 where, tag, sav->refcnt)); 1303 1304 if (sav->refcnt == 0) { 1305 *psav = NULL; 1306 key_delsav(sav); 1307 } 1308 } 1309 1310 /* %%% SPD management */ 1311 /* 1312 * free security policy entry. 1313 */ 1314 static void 1315 key_delsp(struct secpolicy *sp) 1316 { 1317 int s; 1318 1319 IPSEC_ASSERT(sp != NULL, ("key_delsp: null sp")); 1320 1321 key_sp_dead(sp); 1322 1323 IPSEC_ASSERT(sp->refcnt == 0, 1324 ("key_delsp: SP with references deleted (refcnt %u)", 1325 sp->refcnt)); 1326 1327 s = splsoftnet(); /*called from softclock()*/ 1328 1329 { 1330 struct ipsecrequest *isr = sp->req, *nextisr; 1331 1332 while (isr != NULL) { 1333 if (isr->sav != NULL) { 1334 KEY_FREESAV(&isr->sav); 1335 isr->sav = NULL; 1336 } 1337 1338 nextisr = isr->next; 1339 KFREE(isr); 1340 isr = nextisr; 1341 } 1342 } 1343 1344 KFREE(sp); 1345 1346 splx(s); 1347 } 1348 1349 /* 1350 * search SPD 1351 * OUT: NULL : not found 1352 * others : found, pointer to a SP. 1353 */ 1354 static struct secpolicy * 1355 key_getsp(const struct secpolicyindex *spidx) 1356 { 1357 struct secpolicy *sp; 1358 1359 IPSEC_ASSERT(spidx != NULL, ("key_getsp: null spidx")); 1360 1361 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1362 if (sp->state == IPSEC_SPSTATE_DEAD) 1363 continue; 1364 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1365 SP_ADDREF(sp); 1366 return sp; 1367 } 1368 } 1369 1370 return NULL; 1371 } 1372 1373 /* 1374 * get SP by index. 1375 * OUT: NULL : not found 1376 * others : found, pointer to a SP. 1377 */ 1378 static struct secpolicy * 1379 key_getspbyid(u_int32_t id) 1380 { 1381 struct secpolicy *sp; 1382 1383 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1384 if (sp->state == IPSEC_SPSTATE_DEAD) 1385 continue; 1386 if (sp->id == id) { 1387 SP_ADDREF(sp); 1388 return sp; 1389 } 1390 } 1391 1392 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1393 if (sp->state == IPSEC_SPSTATE_DEAD) 1394 continue; 1395 if (sp->id == id) { 1396 SP_ADDREF(sp); 1397 return sp; 1398 } 1399 } 1400 1401 return NULL; 1402 } 1403 1404 struct secpolicy * 1405 key_newsp(const char* where, int tag) 1406 { 1407 struct secpolicy *newsp = NULL; 1408 1409 newsp = (struct secpolicy *) 1410 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); 1411 if (newsp) { 1412 newsp->refcnt = 1; 1413 newsp->req = NULL; 1414 } 1415 1416 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1417 printf("DP key_newsp from %s:%u return SP:%p\n", 1418 where, tag, newsp)); 1419 return newsp; 1420 } 1421 1422 /* 1423 * create secpolicy structure from sadb_x_policy structure. 1424 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1425 * so must be set properly later. 1426 */ 1427 struct secpolicy * 1428 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1429 { 1430 struct secpolicy *newsp; 1431 1432 /* sanity check */ 1433 if (xpl0 == NULL) 1434 panic("key_msg2sp: NULL pointer was passed"); 1435 if (len < sizeof(*xpl0)) 1436 panic("key_msg2sp: invalid length"); 1437 if (len != PFKEY_EXTLEN(xpl0)) { 1438 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1439 *error = EINVAL; 1440 return NULL; 1441 } 1442 1443 if ((newsp = KEY_NEWSP()) == NULL) { 1444 *error = ENOBUFS; 1445 return NULL; 1446 } 1447 1448 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1449 newsp->policy = xpl0->sadb_x_policy_type; 1450 1451 /* check policy */ 1452 switch (xpl0->sadb_x_policy_type) { 1453 case IPSEC_POLICY_DISCARD: 1454 case IPSEC_POLICY_NONE: 1455 case IPSEC_POLICY_ENTRUST: 1456 case IPSEC_POLICY_BYPASS: 1457 newsp->req = NULL; 1458 break; 1459 1460 case IPSEC_POLICY_IPSEC: 1461 { 1462 int tlen; 1463 const struct sadb_x_ipsecrequest *xisr; 1464 uint16_t xisr_reqid; 1465 struct ipsecrequest **p_isr = &newsp->req; 1466 1467 /* validity check */ 1468 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1469 ipseclog((LOG_DEBUG, 1470 "key_msg2sp: Invalid msg length.\n")); 1471 KEY_FREESP(&newsp); 1472 *error = EINVAL; 1473 return NULL; 1474 } 1475 1476 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1477 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1478 1479 while (tlen > 0) { 1480 /* length check */ 1481 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1482 ipseclog((LOG_DEBUG, "key_msg2sp: " 1483 "invalid ipsecrequest length.\n")); 1484 KEY_FREESP(&newsp); 1485 *error = EINVAL; 1486 return NULL; 1487 } 1488 1489 /* allocate request buffer */ 1490 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); 1491 if ((*p_isr) == NULL) { 1492 ipseclog((LOG_DEBUG, 1493 "key_msg2sp: No more memory.\n")); 1494 KEY_FREESP(&newsp); 1495 *error = ENOBUFS; 1496 return NULL; 1497 } 1498 memset(*p_isr, 0, sizeof(**p_isr)); 1499 1500 /* set values */ 1501 (*p_isr)->next = NULL; 1502 1503 switch (xisr->sadb_x_ipsecrequest_proto) { 1504 case IPPROTO_ESP: 1505 case IPPROTO_AH: 1506 case IPPROTO_IPCOMP: 1507 break; 1508 default: 1509 ipseclog((LOG_DEBUG, 1510 "key_msg2sp: invalid proto type=%u\n", 1511 xisr->sadb_x_ipsecrequest_proto)); 1512 KEY_FREESP(&newsp); 1513 *error = EPROTONOSUPPORT; 1514 return NULL; 1515 } 1516 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1517 1518 switch (xisr->sadb_x_ipsecrequest_mode) { 1519 case IPSEC_MODE_TRANSPORT: 1520 case IPSEC_MODE_TUNNEL: 1521 break; 1522 case IPSEC_MODE_ANY: 1523 default: 1524 ipseclog((LOG_DEBUG, 1525 "key_msg2sp: invalid mode=%u\n", 1526 xisr->sadb_x_ipsecrequest_mode)); 1527 KEY_FREESP(&newsp); 1528 *error = EINVAL; 1529 return NULL; 1530 } 1531 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1532 1533 switch (xisr->sadb_x_ipsecrequest_level) { 1534 case IPSEC_LEVEL_DEFAULT: 1535 case IPSEC_LEVEL_USE: 1536 case IPSEC_LEVEL_REQUIRE: 1537 break; 1538 case IPSEC_LEVEL_UNIQUE: 1539 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1540 /* validity check */ 1541 /* 1542 * If range violation of reqid, kernel will 1543 * update it, don't refuse it. 1544 */ 1545 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1546 ipseclog((LOG_DEBUG, 1547 "key_msg2sp: reqid=%d range " 1548 "violation, updated by kernel.\n", 1549 xisr_reqid)); 1550 xisr_reqid = 0; 1551 } 1552 1553 /* allocate new reqid id if reqid is zero. */ 1554 if (xisr_reqid == 0) { 1555 u_int16_t reqid; 1556 if ((reqid = key_newreqid()) == 0) { 1557 KEY_FREESP(&newsp); 1558 *error = ENOBUFS; 1559 return NULL; 1560 } 1561 (*p_isr)->saidx.reqid = reqid; 1562 } else { 1563 /* set it for manual keying. */ 1564 (*p_isr)->saidx.reqid = xisr_reqid; 1565 } 1566 break; 1567 1568 default: 1569 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1570 xisr->sadb_x_ipsecrequest_level)); 1571 KEY_FREESP(&newsp); 1572 *error = EINVAL; 1573 return NULL; 1574 } 1575 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1576 1577 /* set IP addresses if there */ 1578 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1579 const struct sockaddr *paddr; 1580 1581 paddr = (const struct sockaddr *)(xisr + 1); 1582 1583 /* validity check */ 1584 if (paddr->sa_len 1585 > sizeof((*p_isr)->saidx.src)) { 1586 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1587 "address length.\n")); 1588 KEY_FREESP(&newsp); 1589 *error = EINVAL; 1590 return NULL; 1591 } 1592 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1593 1594 paddr = (const struct sockaddr *)((const char *)paddr 1595 + paddr->sa_len); 1596 1597 /* validity check */ 1598 if (paddr->sa_len 1599 > sizeof((*p_isr)->saidx.dst)) { 1600 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1601 "address length.\n")); 1602 KEY_FREESP(&newsp); 1603 *error = EINVAL; 1604 return NULL; 1605 } 1606 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1607 } 1608 1609 (*p_isr)->sav = NULL; 1610 (*p_isr)->sp = newsp; 1611 1612 /* initialization for the next. */ 1613 p_isr = &(*p_isr)->next; 1614 tlen -= xisr->sadb_x_ipsecrequest_len; 1615 1616 /* validity check */ 1617 if (tlen < 0) { 1618 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1619 KEY_FREESP(&newsp); 1620 *error = EINVAL; 1621 return NULL; 1622 } 1623 1624 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr 1625 + xisr->sadb_x_ipsecrequest_len); 1626 } 1627 } 1628 break; 1629 default: 1630 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1631 KEY_FREESP(&newsp); 1632 *error = EINVAL; 1633 return NULL; 1634 } 1635 1636 *error = 0; 1637 return newsp; 1638 } 1639 1640 static u_int16_t 1641 key_newreqid(void) 1642 { 1643 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1644 1645 auto_reqid = (auto_reqid == 0xffff 1646 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1647 1648 /* XXX should be unique check */ 1649 1650 return auto_reqid; 1651 } 1652 1653 /* 1654 * copy secpolicy struct to sadb_x_policy structure indicated. 1655 */ 1656 struct mbuf * 1657 key_sp2msg(const struct secpolicy *sp) 1658 { 1659 struct sadb_x_policy *xpl; 1660 int tlen; 1661 char *p; 1662 struct mbuf *m; 1663 1664 /* sanity check. */ 1665 if (sp == NULL) 1666 panic("key_sp2msg: NULL pointer was passed"); 1667 1668 tlen = key_getspreqmsglen(sp); 1669 1670 m = key_alloc_mbuf(tlen); 1671 if (!m || m->m_next) { /*XXX*/ 1672 if (m) 1673 m_freem(m); 1674 return NULL; 1675 } 1676 1677 m->m_len = tlen; 1678 m->m_next = NULL; 1679 xpl = mtod(m, struct sadb_x_policy *); 1680 memset(xpl, 0, tlen); 1681 1682 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1683 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1684 xpl->sadb_x_policy_type = sp->policy; 1685 xpl->sadb_x_policy_dir = sp->spidx.dir; 1686 xpl->sadb_x_policy_id = sp->id; 1687 p = (char *)xpl + sizeof(*xpl); 1688 1689 /* if is the policy for ipsec ? */ 1690 if (sp->policy == IPSEC_POLICY_IPSEC) { 1691 struct sadb_x_ipsecrequest *xisr; 1692 struct ipsecrequest *isr; 1693 1694 for (isr = sp->req; isr != NULL; isr = isr->next) { 1695 1696 xisr = (struct sadb_x_ipsecrequest *)p; 1697 1698 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1699 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1700 xisr->sadb_x_ipsecrequest_level = isr->level; 1701 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1702 1703 p += sizeof(*xisr); 1704 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1705 p += isr->saidx.src.sa.sa_len; 1706 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1707 p += isr->saidx.src.sa.sa_len; 1708 1709 xisr->sadb_x_ipsecrequest_len = 1710 PFKEY_ALIGN8(sizeof(*xisr) 1711 + isr->saidx.src.sa.sa_len 1712 + isr->saidx.dst.sa.sa_len); 1713 } 1714 } 1715 1716 return m; 1717 } 1718 1719 /* m will not be freed nor modified */ 1720 static struct mbuf * 1721 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1722 int ndeep, int nitem, ...) 1723 { 1724 va_list ap; 1725 int idx; 1726 int i; 1727 struct mbuf *result = NULL, *n; 1728 int len; 1729 1730 if (m == NULL || mhp == NULL) 1731 panic("null pointer passed to key_gather"); 1732 1733 va_start(ap, nitem); 1734 for (i = 0; i < nitem; i++) { 1735 idx = va_arg(ap, int); 1736 if (idx < 0 || idx > SADB_EXT_MAX) 1737 goto fail; 1738 /* don't attempt to pull empty extension */ 1739 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1740 continue; 1741 if (idx != SADB_EXT_RESERVED && 1742 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1743 continue; 1744 1745 if (idx == SADB_EXT_RESERVED) { 1746 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1747 #ifdef DIAGNOSTIC 1748 if (len > MHLEN) 1749 panic("assumption failed"); 1750 #endif 1751 MGETHDR(n, M_DONTWAIT, MT_DATA); 1752 if (!n) 1753 goto fail; 1754 n->m_len = len; 1755 n->m_next = NULL; 1756 m_copydata(m, 0, sizeof(struct sadb_msg), 1757 mtod(n, void *)); 1758 } else if (i < ndeep) { 1759 len = mhp->extlen[idx]; 1760 n = key_alloc_mbuf(len); 1761 if (!n || n->m_next) { /*XXX*/ 1762 if (n) 1763 m_freem(n); 1764 goto fail; 1765 } 1766 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1767 mtod(n, void *)); 1768 } else { 1769 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1770 M_DONTWAIT); 1771 } 1772 if (n == NULL) 1773 goto fail; 1774 1775 if (result) 1776 m_cat(result, n); 1777 else 1778 result = n; 1779 } 1780 va_end(ap); 1781 1782 if ((result->m_flags & M_PKTHDR) != 0) { 1783 result->m_pkthdr.len = 0; 1784 for (n = result; n; n = n->m_next) 1785 result->m_pkthdr.len += n->m_len; 1786 } 1787 1788 return result; 1789 1790 fail: 1791 va_end(ap); 1792 m_freem(result); 1793 return NULL; 1794 } 1795 1796 /* 1797 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1798 * add an entry to SP database, when received 1799 * <base, address(SD), (lifetime(H),) policy> 1800 * from the user(?). 1801 * Adding to SP database, 1802 * and send 1803 * <base, address(SD), (lifetime(H),) policy> 1804 * to the socket which was send. 1805 * 1806 * SPDADD set a unique policy entry. 1807 * SPDSETIDX like SPDADD without a part of policy requests. 1808 * SPDUPDATE replace a unique policy entry. 1809 * 1810 * m will always be freed. 1811 */ 1812 static int 1813 key_spdadd(struct socket *so, struct mbuf *m, 1814 const struct sadb_msghdr *mhp) 1815 { 1816 const struct sadb_address *src0, *dst0; 1817 const struct sadb_x_policy *xpl0; 1818 struct sadb_x_policy *xpl; 1819 const struct sadb_lifetime *lft = NULL; 1820 struct secpolicyindex spidx; 1821 struct secpolicy *newsp; 1822 int error; 1823 1824 /* sanity check */ 1825 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 1826 panic("key_spdadd: NULL pointer is passed"); 1827 1828 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1829 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1830 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1831 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1832 return key_senderror(so, m, EINVAL); 1833 } 1834 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1835 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1836 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1837 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1838 return key_senderror(so, m, EINVAL); 1839 } 1840 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1841 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1842 < sizeof(struct sadb_lifetime)) { 1843 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1844 return key_senderror(so, m, EINVAL); 1845 } 1846 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1847 } 1848 1849 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1850 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1851 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1852 1853 /* make secindex */ 1854 /* XXX boundary check against sa_len */ 1855 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1856 src0 + 1, 1857 dst0 + 1, 1858 src0->sadb_address_prefixlen, 1859 dst0->sadb_address_prefixlen, 1860 src0->sadb_address_proto, 1861 &spidx); 1862 1863 /* checking the direciton. */ 1864 switch (xpl0->sadb_x_policy_dir) { 1865 case IPSEC_DIR_INBOUND: 1866 case IPSEC_DIR_OUTBOUND: 1867 break; 1868 default: 1869 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1870 mhp->msg->sadb_msg_errno = EINVAL; 1871 return 0; 1872 } 1873 1874 /* check policy */ 1875 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1876 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1877 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1878 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1879 return key_senderror(so, m, EINVAL); 1880 } 1881 1882 /* policy requests are mandatory when action is ipsec. */ 1883 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1884 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1885 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1886 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1887 return key_senderror(so, m, EINVAL); 1888 } 1889 1890 /* 1891 * checking there is SP already or not. 1892 * SPDUPDATE doesn't depend on whether there is a SP or not. 1893 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1894 * then error. 1895 */ 1896 newsp = key_getsp(&spidx); 1897 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1898 if (newsp) { 1899 key_sp_dead(newsp); 1900 key_sp_unlink(newsp); /* XXX jrs ordering */ 1901 KEY_FREESP(&newsp); 1902 newsp = NULL; 1903 } 1904 } else { 1905 if (newsp != NULL) { 1906 KEY_FREESP(&newsp); 1907 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1908 return key_senderror(so, m, EEXIST); 1909 } 1910 } 1911 1912 /* allocation new SP entry */ 1913 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1914 return key_senderror(so, m, error); 1915 } 1916 1917 if ((newsp->id = key_getnewspid()) == 0) { 1918 KFREE(newsp); 1919 return key_senderror(so, m, ENOBUFS); 1920 } 1921 1922 /* XXX boundary check against sa_len */ 1923 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1924 src0 + 1, 1925 dst0 + 1, 1926 src0->sadb_address_prefixlen, 1927 dst0->sadb_address_prefixlen, 1928 src0->sadb_address_proto, 1929 &newsp->spidx); 1930 1931 /* sanity check on addr pair */ 1932 if (((const struct sockaddr *)(src0 + 1))->sa_family != 1933 ((const struct sockaddr *)(dst0+ 1))->sa_family) { 1934 KFREE(newsp); 1935 return key_senderror(so, m, EINVAL); 1936 } 1937 if (((const struct sockaddr *)(src0 + 1))->sa_len != 1938 ((const struct sockaddr *)(dst0+ 1))->sa_len) { 1939 KFREE(newsp); 1940 return key_senderror(so, m, EINVAL); 1941 } 1942 1943 newsp->created = time_uptime; 1944 newsp->lastused = newsp->created; 1945 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1946 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1947 1948 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1949 newsp->state = IPSEC_SPSTATE_ALIVE; 1950 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1951 1952 /* delete the entry in spacqtree */ 1953 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1954 struct secspacq *spacq; 1955 if ((spacq = key_getspacq(&spidx)) != NULL) { 1956 /* reset counter in order to deletion by timehandler. */ 1957 spacq->created = time_uptime; 1958 spacq->count = 0; 1959 } 1960 } 1961 1962 #if defined(__NetBSD__) 1963 /* Invalidate all cached SPD pointers in the PCBs. */ 1964 ipsec_invalpcbcacheall(); 1965 1966 #if defined(GATEWAY) 1967 /* Invalidate the ipflow cache, as well. */ 1968 ipflow_invalidate_all(0); 1969 #ifdef INET6 1970 ip6flow_invalidate_all(0); 1971 #endif /* INET6 */ 1972 #endif /* GATEWAY */ 1973 #endif /* __NetBSD__ */ 1974 1975 { 1976 struct mbuf *n, *mpolicy; 1977 struct sadb_msg *newmsg; 1978 int off; 1979 1980 /* create new sadb_msg to reply. */ 1981 if (lft) { 1982 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1983 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1984 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1985 } else { 1986 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1987 SADB_X_EXT_POLICY, 1988 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1989 } 1990 if (!n) 1991 return key_senderror(so, m, ENOBUFS); 1992 1993 if (n->m_len < sizeof(*newmsg)) { 1994 n = m_pullup(n, sizeof(*newmsg)); 1995 if (!n) 1996 return key_senderror(so, m, ENOBUFS); 1997 } 1998 newmsg = mtod(n, struct sadb_msg *); 1999 newmsg->sadb_msg_errno = 0; 2000 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2001 2002 off = 0; 2003 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2004 sizeof(*xpl), &off); 2005 if (mpolicy == NULL) { 2006 /* n is already freed */ 2007 return key_senderror(so, m, ENOBUFS); 2008 } 2009 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2010 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2011 m_freem(n); 2012 return key_senderror(so, m, EINVAL); 2013 } 2014 xpl->sadb_x_policy_id = newsp->id; 2015 2016 m_freem(m); 2017 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2018 } 2019 } 2020 2021 /* 2022 * get new policy id. 2023 * OUT: 2024 * 0: failure. 2025 * others: success. 2026 */ 2027 static u_int32_t 2028 key_getnewspid(void) 2029 { 2030 u_int32_t newid = 0; 2031 int count = key_spi_trycnt; /* XXX */ 2032 struct secpolicy *sp; 2033 2034 /* when requesting to allocate spi ranged */ 2035 while (count--) { 2036 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2037 2038 if ((sp = key_getspbyid(newid)) == NULL) 2039 break; 2040 2041 KEY_FREESP(&sp); 2042 } 2043 2044 if (count == 0 || newid == 0) { 2045 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2046 return 0; 2047 } 2048 2049 return newid; 2050 } 2051 2052 /* 2053 * SADB_SPDDELETE processing 2054 * receive 2055 * <base, address(SD), policy(*)> 2056 * from the user(?), and set SADB_SASTATE_DEAD, 2057 * and send, 2058 * <base, address(SD), policy(*)> 2059 * to the ikmpd. 2060 * policy(*) including direction of policy. 2061 * 2062 * m will always be freed. 2063 */ 2064 static int 2065 key_spddelete(struct socket *so, struct mbuf *m, 2066 const struct sadb_msghdr *mhp) 2067 { 2068 struct sadb_address *src0, *dst0; 2069 struct sadb_x_policy *xpl0; 2070 struct secpolicyindex spidx; 2071 struct secpolicy *sp; 2072 2073 /* sanity check */ 2074 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2075 panic("key_spddelete: NULL pointer is passed"); 2076 2077 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2078 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2079 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2080 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2081 return key_senderror(so, m, EINVAL); 2082 } 2083 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2084 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2085 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2086 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2087 return key_senderror(so, m, EINVAL); 2088 } 2089 2090 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2091 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2092 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2093 2094 /* make secindex */ 2095 /* XXX boundary check against sa_len */ 2096 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2097 src0 + 1, 2098 dst0 + 1, 2099 src0->sadb_address_prefixlen, 2100 dst0->sadb_address_prefixlen, 2101 src0->sadb_address_proto, 2102 &spidx); 2103 2104 /* checking the direciton. */ 2105 switch (xpl0->sadb_x_policy_dir) { 2106 case IPSEC_DIR_INBOUND: 2107 case IPSEC_DIR_OUTBOUND: 2108 break; 2109 default: 2110 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2111 return key_senderror(so, m, EINVAL); 2112 } 2113 2114 /* Is there SP in SPD ? */ 2115 if ((sp = key_getsp(&spidx)) == NULL) { 2116 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2117 return key_senderror(so, m, EINVAL); 2118 } 2119 2120 /* save policy id to buffer to be returned. */ 2121 xpl0->sadb_x_policy_id = sp->id; 2122 2123 key_sp_dead(sp); 2124 key_sp_unlink(sp); /* XXX jrs ordering */ 2125 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2126 2127 #if defined(__NetBSD__) 2128 /* Invalidate all cached SPD pointers in the PCBs. */ 2129 ipsec_invalpcbcacheall(); 2130 2131 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2132 #endif /* __NetBSD__ */ 2133 2134 { 2135 struct mbuf *n; 2136 struct sadb_msg *newmsg; 2137 2138 /* create new sadb_msg to reply. */ 2139 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2140 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2141 if (!n) 2142 return key_senderror(so, m, ENOBUFS); 2143 2144 newmsg = mtod(n, struct sadb_msg *); 2145 newmsg->sadb_msg_errno = 0; 2146 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2147 2148 m_freem(m); 2149 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2150 } 2151 } 2152 2153 /* 2154 * SADB_SPDDELETE2 processing 2155 * receive 2156 * <base, policy(*)> 2157 * from the user(?), and set SADB_SASTATE_DEAD, 2158 * and send, 2159 * <base, policy(*)> 2160 * to the ikmpd. 2161 * policy(*) including direction of policy. 2162 * 2163 * m will always be freed. 2164 */ 2165 static int 2166 key_spddelete2(struct socket *so, struct mbuf *m, 2167 const struct sadb_msghdr *mhp) 2168 { 2169 u_int32_t id; 2170 struct secpolicy *sp; 2171 2172 /* sanity check */ 2173 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2174 panic("key_spddelete2: NULL pointer is passed"); 2175 2176 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2177 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2178 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2179 key_senderror(so, m, EINVAL); 2180 return 0; 2181 } 2182 2183 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2184 2185 /* Is there SP in SPD ? */ 2186 if ((sp = key_getspbyid(id)) == NULL) { 2187 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2188 return key_senderror(so, m, EINVAL); 2189 } 2190 2191 key_sp_dead(sp); 2192 key_sp_unlink(sp); /* XXX jrs ordering */ 2193 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2194 sp = NULL; 2195 2196 #if defined(__NetBSD__) 2197 /* Invalidate all cached SPD pointers in the PCBs. */ 2198 ipsec_invalpcbcacheall(); 2199 2200 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2201 #endif /* __NetBSD__ */ 2202 2203 { 2204 struct mbuf *n, *nn; 2205 struct sadb_msg *newmsg; 2206 int off, len; 2207 2208 /* create new sadb_msg to reply. */ 2209 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2210 2211 if (len > MCLBYTES) 2212 return key_senderror(so, m, ENOBUFS); 2213 MGETHDR(n, M_DONTWAIT, MT_DATA); 2214 if (n && len > MHLEN) { 2215 MCLGET(n, M_DONTWAIT); 2216 if ((n->m_flags & M_EXT) == 0) { 2217 m_freem(n); 2218 n = NULL; 2219 } 2220 } 2221 if (!n) 2222 return key_senderror(so, m, ENOBUFS); 2223 2224 n->m_len = len; 2225 n->m_next = NULL; 2226 off = 0; 2227 2228 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2229 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2230 2231 #ifdef DIAGNOSTIC 2232 if (off != len) 2233 panic("length inconsistency in key_spddelete2"); 2234 #endif 2235 2236 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2237 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2238 if (!n->m_next) { 2239 m_freem(n); 2240 return key_senderror(so, m, ENOBUFS); 2241 } 2242 2243 n->m_pkthdr.len = 0; 2244 for (nn = n; nn; nn = nn->m_next) 2245 n->m_pkthdr.len += nn->m_len; 2246 2247 newmsg = mtod(n, struct sadb_msg *); 2248 newmsg->sadb_msg_errno = 0; 2249 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2250 2251 m_freem(m); 2252 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2253 } 2254 } 2255 2256 /* 2257 * SADB_X_GET processing 2258 * receive 2259 * <base, policy(*)> 2260 * from the user(?), 2261 * and send, 2262 * <base, address(SD), policy> 2263 * to the ikmpd. 2264 * policy(*) including direction of policy. 2265 * 2266 * m will always be freed. 2267 */ 2268 static int 2269 key_spdget(struct socket *so, struct mbuf *m, 2270 const struct sadb_msghdr *mhp) 2271 { 2272 u_int32_t id; 2273 struct secpolicy *sp; 2274 struct mbuf *n; 2275 2276 /* sanity check */ 2277 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2278 panic("key_spdget: NULL pointer is passed"); 2279 2280 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2281 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2282 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2283 return key_senderror(so, m, EINVAL); 2284 } 2285 2286 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2287 2288 /* Is there SP in SPD ? */ 2289 if ((sp = key_getspbyid(id)) == NULL) { 2290 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2291 return key_senderror(so, m, ENOENT); 2292 } 2293 2294 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2295 mhp->msg->sadb_msg_pid); 2296 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2297 if (n != NULL) { 2298 m_freem(m); 2299 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2300 } else 2301 return key_senderror(so, m, ENOBUFS); 2302 } 2303 2304 /* 2305 * SADB_X_SPDACQUIRE processing. 2306 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2307 * send 2308 * <base, policy(*)> 2309 * to KMD, and expect to receive 2310 * <base> with SADB_X_SPDACQUIRE if error occurred, 2311 * or 2312 * <base, policy> 2313 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2314 * policy(*) is without policy requests. 2315 * 2316 * 0 : succeed 2317 * others: error number 2318 */ 2319 int 2320 key_spdacquire(const struct secpolicy *sp) 2321 { 2322 struct mbuf *result = NULL, *m; 2323 struct secspacq *newspacq; 2324 int error; 2325 2326 /* sanity check */ 2327 if (sp == NULL) 2328 panic("key_spdacquire: NULL pointer is passed"); 2329 if (sp->req != NULL) 2330 panic("key_spdacquire: called but there is request"); 2331 if (sp->policy != IPSEC_POLICY_IPSEC) 2332 panic("key_spdacquire: policy mismathed. IPsec is expected"); 2333 2334 /* Get an entry to check whether sent message or not. */ 2335 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2336 if (key_blockacq_count < newspacq->count) { 2337 /* reset counter and do send message. */ 2338 newspacq->count = 0; 2339 } else { 2340 /* increment counter and do nothing. */ 2341 newspacq->count++; 2342 return 0; 2343 } 2344 } else { 2345 /* make new entry for blocking to send SADB_ACQUIRE. */ 2346 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2347 return ENOBUFS; 2348 2349 /* add to acqtree */ 2350 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2351 } 2352 2353 /* create new sadb_msg to reply. */ 2354 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2355 if (!m) { 2356 error = ENOBUFS; 2357 goto fail; 2358 } 2359 result = m; 2360 2361 result->m_pkthdr.len = 0; 2362 for (m = result; m; m = m->m_next) 2363 result->m_pkthdr.len += m->m_len; 2364 2365 mtod(result, struct sadb_msg *)->sadb_msg_len = 2366 PFKEY_UNIT64(result->m_pkthdr.len); 2367 2368 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2369 2370 fail: 2371 if (result) 2372 m_freem(result); 2373 return error; 2374 } 2375 2376 /* 2377 * SADB_SPDFLUSH processing 2378 * receive 2379 * <base> 2380 * from the user, and free all entries in secpctree. 2381 * and send, 2382 * <base> 2383 * to the user. 2384 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2385 * 2386 * m will always be freed. 2387 */ 2388 static int 2389 key_spdflush(struct socket *so, struct mbuf *m, 2390 const struct sadb_msghdr *mhp) 2391 { 2392 struct sadb_msg *newmsg; 2393 struct secpolicy *sp; 2394 u_int dir; 2395 2396 /* sanity check */ 2397 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2398 panic("key_spdflush: NULL pointer is passed"); 2399 2400 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2401 return key_senderror(so, m, EINVAL); 2402 2403 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2404 struct secpolicy * nextsp; 2405 for (sp = LIST_FIRST(&sptree[dir]); 2406 sp != NULL; 2407 sp = nextsp) { 2408 2409 nextsp = LIST_NEXT(sp, chain); 2410 if (sp->state == IPSEC_SPSTATE_DEAD) 2411 continue; 2412 key_sp_dead(sp); 2413 key_sp_unlink(sp); 2414 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2415 continue; 2416 } 2417 } 2418 2419 #if defined(__NetBSD__) 2420 /* Invalidate all cached SPD pointers in the PCBs. */ 2421 ipsec_invalpcbcacheall(); 2422 2423 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2424 #endif /* __NetBSD__ */ 2425 2426 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2427 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2428 return key_senderror(so, m, ENOBUFS); 2429 } 2430 2431 if (m->m_next) 2432 m_freem(m->m_next); 2433 m->m_next = NULL; 2434 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2435 newmsg = mtod(m, struct sadb_msg *); 2436 newmsg->sadb_msg_errno = 0; 2437 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2438 2439 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2440 } 2441 2442 static struct sockaddr key_src = { 2443 .sa_len = 2, 2444 .sa_family = PF_KEY, 2445 }; 2446 2447 static struct mbuf * 2448 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2449 { 2450 struct secpolicy *sp; 2451 int cnt; 2452 u_int dir; 2453 struct mbuf *m, *n, *prev; 2454 int totlen; 2455 2456 *lenp = 0; 2457 2458 /* search SPD entry and get buffer size. */ 2459 cnt = 0; 2460 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2461 LIST_FOREACH(sp, &sptree[dir], chain) { 2462 cnt++; 2463 } 2464 } 2465 2466 if (cnt == 0) { 2467 *errorp = ENOENT; 2468 return (NULL); 2469 } 2470 2471 m = NULL; 2472 prev = m; 2473 totlen = 0; 2474 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2475 LIST_FOREACH(sp, &sptree[dir], chain) { 2476 --cnt; 2477 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2478 2479 if (!n) { 2480 *errorp = ENOBUFS; 2481 if (m) m_freem(m); 2482 return (NULL); 2483 } 2484 2485 totlen += n->m_pkthdr.len; 2486 if (!m) { 2487 m = n; 2488 } else { 2489 prev->m_nextpkt = n; 2490 } 2491 prev = n; 2492 } 2493 } 2494 2495 *lenp = totlen; 2496 *errorp = 0; 2497 return (m); 2498 } 2499 2500 /* 2501 * SADB_SPDDUMP processing 2502 * receive 2503 * <base> 2504 * from the user, and dump all SP leaves 2505 * and send, 2506 * <base> ..... 2507 * to the ikmpd. 2508 * 2509 * m will always be freed. 2510 */ 2511 static int 2512 key_spddump(struct socket *so, struct mbuf *m0, 2513 const struct sadb_msghdr *mhp) 2514 { 2515 struct mbuf *n; 2516 int error, len; 2517 int ok, s; 2518 pid_t pid; 2519 2520 /* sanity check */ 2521 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 2522 panic("key_spddump: NULL pointer is passed"); 2523 2524 2525 pid = mhp->msg->sadb_msg_pid; 2526 /* 2527 * If the requestor has insufficient socket-buffer space 2528 * for the entire chain, nobody gets any response to the DUMP. 2529 * XXX For now, only the requestor ever gets anything. 2530 * Moreover, if the requestor has any space at all, they receive 2531 * the entire chain, otherwise the request is refused with ENOBUFS. 2532 */ 2533 if (sbspace(&so->so_rcv) <= 0) { 2534 return key_senderror(so, m0, ENOBUFS); 2535 } 2536 2537 s = splsoftnet(); 2538 n = key_setspddump_chain(&error, &len, pid); 2539 splx(s); 2540 2541 if (n == NULL) { 2542 return key_senderror(so, m0, ENOENT); 2543 } 2544 { 2545 uint64_t *ps = PFKEY_STAT_GETREF(); 2546 ps[PFKEY_STAT_IN_TOTAL]++; 2547 ps[PFKEY_STAT_IN_BYTES] += len; 2548 PFKEY_STAT_PUTREF(); 2549 } 2550 2551 /* 2552 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2553 * The requestor receives either the entire chain, or an 2554 * error message with ENOBUFS. 2555 */ 2556 2557 /* 2558 * sbappendchainwith record takes the chain of entries, one 2559 * packet-record per SPD entry, prepends the key_src sockaddr 2560 * to each packet-record, links the sockaddr mbufs into a new 2561 * list of records, then appends the entire resulting 2562 * list to the requesting socket. 2563 */ 2564 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2565 n, SB_PRIO_ONESHOT_OVERFLOW); 2566 2567 if (!ok) { 2568 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2569 m_freem(n); 2570 return key_senderror(so, m0, ENOBUFS); 2571 } 2572 2573 m_freem(m0); 2574 return error; 2575 } 2576 2577 #ifdef IPSEC_NAT_T 2578 /* 2579 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2580 */ 2581 static int 2582 key_nat_map(struct socket *so, struct mbuf *m, 2583 const struct sadb_msghdr *mhp) 2584 { 2585 struct sadb_x_nat_t_type *type; 2586 struct sadb_x_nat_t_port *sport; 2587 struct sadb_x_nat_t_port *dport; 2588 struct sadb_address *iaddr, *raddr; 2589 struct sadb_x_nat_t_frag *frag; 2590 2591 /* sanity check */ 2592 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2593 panic("key_nat_map: NULL pointer is passed."); 2594 2595 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2596 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2597 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2598 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2599 return key_senderror(so, m, EINVAL); 2600 } 2601 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2602 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2603 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2604 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2605 return key_senderror(so, m, EINVAL); 2606 } 2607 2608 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2609 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2610 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2611 return key_senderror(so, m, EINVAL); 2612 } 2613 2614 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2615 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2616 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2617 return key_senderror(so, m, EINVAL); 2618 } 2619 2620 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2621 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2622 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2623 return key_senderror(so, m, EINVAL); 2624 } 2625 2626 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2627 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2628 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2629 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2630 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2631 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2632 2633 printf("sadb_nat_map called\n"); 2634 2635 /* 2636 * XXX handle that, it should also contain a SA, or anything 2637 * that enable to update the SA information. 2638 */ 2639 2640 return 0; 2641 } 2642 #endif /* IPSEC_NAT_T */ 2643 2644 static struct mbuf * 2645 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2646 { 2647 struct mbuf *result = NULL, *m; 2648 2649 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2650 if (!m) 2651 goto fail; 2652 result = m; 2653 2654 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2655 &sp->spidx.src.sa, sp->spidx.prefs, 2656 sp->spidx.ul_proto); 2657 if (!m) 2658 goto fail; 2659 m_cat(result, m); 2660 2661 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2662 &sp->spidx.dst.sa, sp->spidx.prefd, 2663 sp->spidx.ul_proto); 2664 if (!m) 2665 goto fail; 2666 m_cat(result, m); 2667 2668 m = key_sp2msg(sp); 2669 if (!m) 2670 goto fail; 2671 m_cat(result, m); 2672 2673 if ((result->m_flags & M_PKTHDR) == 0) 2674 goto fail; 2675 2676 if (result->m_len < sizeof(struct sadb_msg)) { 2677 result = m_pullup(result, sizeof(struct sadb_msg)); 2678 if (result == NULL) 2679 goto fail; 2680 } 2681 2682 result->m_pkthdr.len = 0; 2683 for (m = result; m; m = m->m_next) 2684 result->m_pkthdr.len += m->m_len; 2685 2686 mtod(result, struct sadb_msg *)->sadb_msg_len = 2687 PFKEY_UNIT64(result->m_pkthdr.len); 2688 2689 return result; 2690 2691 fail: 2692 m_freem(result); 2693 return NULL; 2694 } 2695 2696 /* 2697 * get PFKEY message length for security policy and request. 2698 */ 2699 static u_int 2700 key_getspreqmsglen(const struct secpolicy *sp) 2701 { 2702 u_int tlen; 2703 2704 tlen = sizeof(struct sadb_x_policy); 2705 2706 /* if is the policy for ipsec ? */ 2707 if (sp->policy != IPSEC_POLICY_IPSEC) 2708 return tlen; 2709 2710 /* get length of ipsec requests */ 2711 { 2712 const struct ipsecrequest *isr; 2713 int len; 2714 2715 for (isr = sp->req; isr != NULL; isr = isr->next) { 2716 len = sizeof(struct sadb_x_ipsecrequest) 2717 + isr->saidx.src.sa.sa_len 2718 + isr->saidx.dst.sa.sa_len; 2719 2720 tlen += PFKEY_ALIGN8(len); 2721 } 2722 } 2723 2724 return tlen; 2725 } 2726 2727 /* 2728 * SADB_SPDEXPIRE processing 2729 * send 2730 * <base, address(SD), lifetime(CH), policy> 2731 * to KMD by PF_KEY. 2732 * 2733 * OUT: 0 : succeed 2734 * others : error number 2735 */ 2736 static int 2737 key_spdexpire(struct secpolicy *sp) 2738 { 2739 int s; 2740 struct mbuf *result = NULL, *m; 2741 int len; 2742 int error = -1; 2743 struct sadb_lifetime *lt; 2744 2745 /* XXX: Why do we lock ? */ 2746 s = splsoftnet(); /*called from softclock()*/ 2747 2748 /* sanity check */ 2749 if (sp == NULL) 2750 panic("key_spdexpire: NULL pointer is passed"); 2751 2752 /* set msg header */ 2753 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2754 if (!m) { 2755 error = ENOBUFS; 2756 goto fail; 2757 } 2758 result = m; 2759 2760 /* create lifetime extension (current and hard) */ 2761 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2762 m = key_alloc_mbuf(len); 2763 if (!m || m->m_next) { /*XXX*/ 2764 if (m) 2765 m_freem(m); 2766 error = ENOBUFS; 2767 goto fail; 2768 } 2769 memset(mtod(m, void *), 0, len); 2770 lt = mtod(m, struct sadb_lifetime *); 2771 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2772 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2773 lt->sadb_lifetime_allocations = 0; 2774 lt->sadb_lifetime_bytes = 0; 2775 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2776 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2777 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2778 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2779 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2780 lt->sadb_lifetime_allocations = 0; 2781 lt->sadb_lifetime_bytes = 0; 2782 lt->sadb_lifetime_addtime = sp->lifetime; 2783 lt->sadb_lifetime_usetime = sp->validtime; 2784 m_cat(result, m); 2785 2786 /* set sadb_address for source */ 2787 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2788 &sp->spidx.src.sa, 2789 sp->spidx.prefs, sp->spidx.ul_proto); 2790 if (!m) { 2791 error = ENOBUFS; 2792 goto fail; 2793 } 2794 m_cat(result, m); 2795 2796 /* set sadb_address for destination */ 2797 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2798 &sp->spidx.dst.sa, 2799 sp->spidx.prefd, sp->spidx.ul_proto); 2800 if (!m) { 2801 error = ENOBUFS; 2802 goto fail; 2803 } 2804 m_cat(result, m); 2805 2806 /* set secpolicy */ 2807 m = key_sp2msg(sp); 2808 if (!m) { 2809 error = ENOBUFS; 2810 goto fail; 2811 } 2812 m_cat(result, m); 2813 2814 if ((result->m_flags & M_PKTHDR) == 0) { 2815 error = EINVAL; 2816 goto fail; 2817 } 2818 2819 if (result->m_len < sizeof(struct sadb_msg)) { 2820 result = m_pullup(result, sizeof(struct sadb_msg)); 2821 if (result == NULL) { 2822 error = ENOBUFS; 2823 goto fail; 2824 } 2825 } 2826 2827 result->m_pkthdr.len = 0; 2828 for (m = result; m; m = m->m_next) 2829 result->m_pkthdr.len += m->m_len; 2830 2831 mtod(result, struct sadb_msg *)->sadb_msg_len = 2832 PFKEY_UNIT64(result->m_pkthdr.len); 2833 2834 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2835 2836 fail: 2837 if (result) 2838 m_freem(result); 2839 splx(s); 2840 return error; 2841 } 2842 2843 /* %%% SAD management */ 2844 /* 2845 * allocating a memory for new SA head, and copy from the values of mhp. 2846 * OUT: NULL : failure due to the lack of memory. 2847 * others : pointer to new SA head. 2848 */ 2849 static struct secashead * 2850 key_newsah(const struct secasindex *saidx) 2851 { 2852 struct secashead *newsah; 2853 2854 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx")); 2855 2856 newsah = (struct secashead *) 2857 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2858 if (newsah != NULL) { 2859 int i; 2860 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2861 LIST_INIT(&newsah->savtree[i]); 2862 newsah->saidx = *saidx; 2863 2864 /* add to saidxtree */ 2865 newsah->state = SADB_SASTATE_MATURE; 2866 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2867 } 2868 return(newsah); 2869 } 2870 2871 /* 2872 * delete SA index and all SA registerd. 2873 */ 2874 static void 2875 key_delsah(struct secashead *sah) 2876 { 2877 struct secasvar *sav, *nextsav; 2878 u_int stateidx, state; 2879 int s; 2880 int zombie = 0; 2881 2882 /* sanity check */ 2883 if (sah == NULL) 2884 panic("key_delsah: NULL pointer is passed"); 2885 2886 s = splsoftnet(); /*called from softclock()*/ 2887 2888 /* searching all SA registerd in the secindex. */ 2889 for (stateidx = 0; 2890 stateidx < _ARRAYLEN(saorder_state_any); 2891 stateidx++) { 2892 2893 state = saorder_state_any[stateidx]; 2894 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2895 sav != NULL; 2896 sav = nextsav) { 2897 2898 nextsav = LIST_NEXT(sav, chain); 2899 2900 if (sav->refcnt == 0) { 2901 /* sanity check */ 2902 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2903 KEY_FREESAV(&sav); 2904 } else { 2905 /* give up to delete this sa */ 2906 zombie++; 2907 } 2908 } 2909 } 2910 2911 /* don't delete sah only if there are savs. */ 2912 if (zombie) { 2913 splx(s); 2914 return; 2915 } 2916 2917 rtcache_free(&sah->sa_route); 2918 2919 /* remove from tree of SA index */ 2920 if (__LIST_CHAINED(sah)) 2921 LIST_REMOVE(sah, chain); 2922 2923 KFREE(sah); 2924 2925 splx(s); 2926 return; 2927 } 2928 2929 /* 2930 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2931 * and copy the values of mhp into new buffer. 2932 * When SAD message type is GETSPI: 2933 * to set sequence number from acq_seq++, 2934 * to set zero to SPI. 2935 * not to call key_setsava(). 2936 * OUT: NULL : fail 2937 * others : pointer to new secasvar. 2938 * 2939 * does not modify mbuf. does not free mbuf on error. 2940 */ 2941 static struct secasvar * 2942 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2943 struct secashead *sah, int *errp, 2944 const char* where, int tag) 2945 { 2946 struct secasvar *newsav; 2947 const struct sadb_sa *xsa; 2948 2949 /* sanity check */ 2950 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) 2951 panic("key_newsa: NULL pointer is passed"); 2952 2953 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2954 if (newsav == NULL) { 2955 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2956 *errp = ENOBUFS; 2957 goto done; 2958 } 2959 memset(newsav, 0, sizeof(struct secasvar)); 2960 2961 switch (mhp->msg->sadb_msg_type) { 2962 case SADB_GETSPI: 2963 newsav->spi = 0; 2964 2965 #ifdef IPSEC_DOSEQCHECK 2966 /* sync sequence number */ 2967 if (mhp->msg->sadb_msg_seq == 0) 2968 newsav->seq = 2969 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2970 else 2971 #endif 2972 newsav->seq = mhp->msg->sadb_msg_seq; 2973 break; 2974 2975 case SADB_ADD: 2976 /* sanity check */ 2977 if (mhp->ext[SADB_EXT_SA] == NULL) { 2978 KFREE(newsav), newsav = NULL; 2979 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2980 *errp = EINVAL; 2981 goto done; 2982 } 2983 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2984 newsav->spi = xsa->sadb_sa_spi; 2985 newsav->seq = mhp->msg->sadb_msg_seq; 2986 break; 2987 default: 2988 KFREE(newsav), newsav = NULL; 2989 *errp = EINVAL; 2990 goto done; 2991 } 2992 2993 /* copy sav values */ 2994 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2995 *errp = key_setsaval(newsav, m, mhp); 2996 if (*errp) { 2997 KFREE(newsav), newsav = NULL; 2998 goto done; 2999 } 3000 } 3001 3002 /* reset created */ 3003 newsav->created = time_uptime; 3004 newsav->pid = mhp->msg->sadb_msg_pid; 3005 3006 /* add to satree */ 3007 newsav->sah = sah; 3008 newsav->refcnt = 1; 3009 newsav->state = SADB_SASTATE_LARVAL; 3010 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 3011 secasvar, chain); 3012 done: 3013 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3014 printf("DP key_newsav from %s:%u return SP:%p\n", 3015 where, tag, newsav)); 3016 3017 return newsav; 3018 } 3019 3020 /* 3021 * free() SA variable entry. 3022 */ 3023 static void 3024 key_delsav(struct secasvar *sav) 3025 { 3026 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav")); 3027 IPSEC_ASSERT(sav->refcnt == 0, 3028 ("key_delsav: reference count %u > 0", sav->refcnt)); 3029 3030 /* remove from SA header */ 3031 if (__LIST_CHAINED(sav)) 3032 LIST_REMOVE(sav, chain); 3033 3034 /* 3035 * Cleanup xform state. Note that zeroize'ing causes the 3036 * keys to be cleared; otherwise we must do it ourself. 3037 */ 3038 if (sav->tdb_xform != NULL) { 3039 sav->tdb_xform->xf_zeroize(sav); 3040 sav->tdb_xform = NULL; 3041 } else { 3042 if (sav->key_auth != NULL) 3043 explicit_bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth)); 3044 if (sav->key_enc != NULL) 3045 explicit_bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc)); 3046 } 3047 if (sav->key_auth != NULL) { 3048 KFREE(sav->key_auth); 3049 sav->key_auth = NULL; 3050 } 3051 if (sav->key_enc != NULL) { 3052 KFREE(sav->key_enc); 3053 sav->key_enc = NULL; 3054 } 3055 if (sav->replay != NULL) { 3056 KFREE(sav->replay); 3057 sav->replay = NULL; 3058 } 3059 if (sav->lft_c != NULL) { 3060 KFREE(sav->lft_c); 3061 sav->lft_c = NULL; 3062 } 3063 if (sav->lft_h != NULL) { 3064 KFREE(sav->lft_h); 3065 sav->lft_h = NULL; 3066 } 3067 if (sav->lft_s != NULL) { 3068 KFREE(sav->lft_s); 3069 sav->lft_s = NULL; 3070 } 3071 3072 KFREE(sav); 3073 3074 return; 3075 } 3076 3077 /* 3078 * search SAD. 3079 * OUT: 3080 * NULL : not found 3081 * others : found, pointer to a SA. 3082 */ 3083 static struct secashead * 3084 key_getsah(const struct secasindex *saidx) 3085 { 3086 struct secashead *sah; 3087 3088 LIST_FOREACH(sah, &sahtree, chain) { 3089 if (sah->state == SADB_SASTATE_DEAD) 3090 continue; 3091 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3092 return sah; 3093 } 3094 3095 return NULL; 3096 } 3097 3098 /* 3099 * check not to be duplicated SPI. 3100 * NOTE: this function is too slow due to searching all SAD. 3101 * OUT: 3102 * NULL : not found 3103 * others : found, pointer to a SA. 3104 */ 3105 static struct secasvar * 3106 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3107 { 3108 struct secashead *sah; 3109 struct secasvar *sav; 3110 3111 /* check address family */ 3112 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3113 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3114 return NULL; 3115 } 3116 3117 /* check all SAD */ 3118 LIST_FOREACH(sah, &sahtree, chain) { 3119 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3120 continue; 3121 sav = key_getsavbyspi(sah, spi); 3122 if (sav != NULL) 3123 return sav; 3124 } 3125 3126 return NULL; 3127 } 3128 3129 /* 3130 * search SAD litmited alive SA, protocol, SPI. 3131 * OUT: 3132 * NULL : not found 3133 * others : found, pointer to a SA. 3134 */ 3135 static struct secasvar * 3136 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3137 { 3138 struct secasvar *sav; 3139 u_int stateidx, state; 3140 3141 /* search all status */ 3142 for (stateidx = 0; 3143 stateidx < _ARRAYLEN(saorder_state_alive); 3144 stateidx++) { 3145 3146 state = saorder_state_alive[stateidx]; 3147 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3148 3149 /* sanity check */ 3150 if (sav->state != state) { 3151 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3152 "invalid sav->state (queue: %d SA: %d)\n", 3153 state, sav->state)); 3154 continue; 3155 } 3156 3157 if (sav->spi == spi) 3158 return sav; 3159 } 3160 } 3161 3162 return NULL; 3163 } 3164 3165 /* 3166 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3167 * You must update these if need. 3168 * OUT: 0: success. 3169 * !0: failure. 3170 * 3171 * does not modify mbuf. does not free mbuf on error. 3172 */ 3173 static int 3174 key_setsaval(struct secasvar *sav, struct mbuf *m, 3175 const struct sadb_msghdr *mhp) 3176 { 3177 int error = 0; 3178 3179 /* sanity check */ 3180 if (m == NULL || mhp == NULL || mhp->msg == NULL) 3181 panic("key_setsaval: NULL pointer is passed"); 3182 3183 /* initialization */ 3184 sav->replay = NULL; 3185 sav->key_auth = NULL; 3186 sav->key_enc = NULL; 3187 sav->lft_c = NULL; 3188 sav->lft_h = NULL; 3189 sav->lft_s = NULL; 3190 sav->tdb_xform = NULL; /* transform */ 3191 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3192 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3193 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3194 #ifdef IPSEC_NAT_T 3195 sav->natt_type = 0; 3196 sav->esp_frag = 0; 3197 #endif 3198 3199 /* SA */ 3200 if (mhp->ext[SADB_EXT_SA] != NULL) { 3201 const struct sadb_sa *sa0; 3202 3203 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3204 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3205 error = EINVAL; 3206 goto fail; 3207 } 3208 3209 sav->alg_auth = sa0->sadb_sa_auth; 3210 sav->alg_enc = sa0->sadb_sa_encrypt; 3211 sav->flags = sa0->sadb_sa_flags; 3212 3213 /* replay window */ 3214 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3215 sav->replay = (struct secreplay *) 3216 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3217 if (sav->replay == NULL) { 3218 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3219 error = ENOBUFS; 3220 goto fail; 3221 } 3222 if (sa0->sadb_sa_replay != 0) 3223 sav->replay->bitmap = (char*)(sav->replay+1); 3224 sav->replay->wsize = sa0->sadb_sa_replay; 3225 } 3226 } 3227 3228 /* Authentication keys */ 3229 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3230 const struct sadb_key *key0; 3231 int len; 3232 3233 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3234 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3235 3236 error = 0; 3237 if (len < sizeof(*key0)) { 3238 error = EINVAL; 3239 goto fail; 3240 } 3241 switch (mhp->msg->sadb_msg_satype) { 3242 case SADB_SATYPE_AH: 3243 case SADB_SATYPE_ESP: 3244 case SADB_X_SATYPE_TCPSIGNATURE: 3245 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3246 sav->alg_auth != SADB_X_AALG_NULL) 3247 error = EINVAL; 3248 break; 3249 case SADB_X_SATYPE_IPCOMP: 3250 default: 3251 error = EINVAL; 3252 break; 3253 } 3254 if (error) { 3255 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3256 goto fail; 3257 } 3258 3259 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3260 if (sav->key_auth == NULL) { 3261 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3262 error = ENOBUFS; 3263 goto fail; 3264 } 3265 } 3266 3267 /* Encryption key */ 3268 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3269 const struct sadb_key *key0; 3270 int len; 3271 3272 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3273 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3274 3275 error = 0; 3276 if (len < sizeof(*key0)) { 3277 error = EINVAL; 3278 goto fail; 3279 } 3280 switch (mhp->msg->sadb_msg_satype) { 3281 case SADB_SATYPE_ESP: 3282 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3283 sav->alg_enc != SADB_EALG_NULL) { 3284 error = EINVAL; 3285 break; 3286 } 3287 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3288 if (sav->key_enc == NULL) { 3289 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3290 error = ENOBUFS; 3291 goto fail; 3292 } 3293 break; 3294 case SADB_X_SATYPE_IPCOMP: 3295 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3296 error = EINVAL; 3297 sav->key_enc = NULL; /*just in case*/ 3298 break; 3299 case SADB_SATYPE_AH: 3300 case SADB_X_SATYPE_TCPSIGNATURE: 3301 default: 3302 error = EINVAL; 3303 break; 3304 } 3305 if (error) { 3306 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3307 goto fail; 3308 } 3309 } 3310 3311 /* set iv */ 3312 sav->ivlen = 0; 3313 3314 switch (mhp->msg->sadb_msg_satype) { 3315 case SADB_SATYPE_AH: 3316 error = xform_init(sav, XF_AH); 3317 break; 3318 case SADB_SATYPE_ESP: 3319 error = xform_init(sav, XF_ESP); 3320 break; 3321 case SADB_X_SATYPE_IPCOMP: 3322 error = xform_init(sav, XF_IPCOMP); 3323 break; 3324 case SADB_X_SATYPE_TCPSIGNATURE: 3325 error = xform_init(sav, XF_TCPSIGNATURE); 3326 break; 3327 } 3328 if (error) { 3329 ipseclog((LOG_DEBUG, 3330 "key_setsaval: unable to initialize SA type %u.\n", 3331 mhp->msg->sadb_msg_satype)); 3332 goto fail; 3333 } 3334 3335 /* reset created */ 3336 sav->created = time_uptime; 3337 3338 /* make lifetime for CURRENT */ 3339 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3340 sizeof(struct sadb_lifetime)); 3341 if (sav->lft_c == NULL) { 3342 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3343 error = ENOBUFS; 3344 goto fail; 3345 } 3346 3347 sav->lft_c->sadb_lifetime_len = 3348 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3349 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3350 sav->lft_c->sadb_lifetime_allocations = 0; 3351 sav->lft_c->sadb_lifetime_bytes = 0; 3352 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3353 sav->lft_c->sadb_lifetime_usetime = 0; 3354 3355 /* lifetimes for HARD and SOFT */ 3356 { 3357 const struct sadb_lifetime *lft0; 3358 3359 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3360 if (lft0 != NULL) { 3361 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3362 error = EINVAL; 3363 goto fail; 3364 } 3365 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3366 sizeof(*lft0)); 3367 if (sav->lft_h == NULL) { 3368 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3369 error = ENOBUFS; 3370 goto fail; 3371 } 3372 /* to be initialize ? */ 3373 } 3374 3375 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3376 if (lft0 != NULL) { 3377 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3378 error = EINVAL; 3379 goto fail; 3380 } 3381 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3382 sizeof(*lft0)); 3383 if (sav->lft_s == NULL) { 3384 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3385 error = ENOBUFS; 3386 goto fail; 3387 } 3388 /* to be initialize ? */ 3389 } 3390 } 3391 3392 return 0; 3393 3394 fail: 3395 /* initialization */ 3396 if (sav->replay != NULL) { 3397 KFREE(sav->replay); 3398 sav->replay = NULL; 3399 } 3400 if (sav->key_auth != NULL) { 3401 KFREE(sav->key_auth); 3402 sav->key_auth = NULL; 3403 } 3404 if (sav->key_enc != NULL) { 3405 KFREE(sav->key_enc); 3406 sav->key_enc = NULL; 3407 } 3408 if (sav->lft_c != NULL) { 3409 KFREE(sav->lft_c); 3410 sav->lft_c = NULL; 3411 } 3412 if (sav->lft_h != NULL) { 3413 KFREE(sav->lft_h); 3414 sav->lft_h = NULL; 3415 } 3416 if (sav->lft_s != NULL) { 3417 KFREE(sav->lft_s); 3418 sav->lft_s = NULL; 3419 } 3420 3421 return error; 3422 } 3423 3424 /* 3425 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3426 * OUT: 0: valid 3427 * other: errno 3428 */ 3429 static int 3430 key_mature(struct secasvar *sav) 3431 { 3432 int error; 3433 3434 /* check SPI value */ 3435 switch (sav->sah->saidx.proto) { 3436 case IPPROTO_ESP: 3437 case IPPROTO_AH: 3438 if (ntohl(sav->spi) <= 255) { 3439 ipseclog((LOG_DEBUG, 3440 "key_mature: illegal range of SPI %u.\n", 3441 (u_int32_t)ntohl(sav->spi))); 3442 return EINVAL; 3443 } 3444 break; 3445 } 3446 3447 /* check satype */ 3448 switch (sav->sah->saidx.proto) { 3449 case IPPROTO_ESP: 3450 /* check flags */ 3451 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3452 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3453 ipseclog((LOG_DEBUG, "key_mature: " 3454 "invalid flag (derived) given to old-esp.\n")); 3455 return EINVAL; 3456 } 3457 error = xform_init(sav, XF_ESP); 3458 break; 3459 case IPPROTO_AH: 3460 /* check flags */ 3461 if (sav->flags & SADB_X_EXT_DERIV) { 3462 ipseclog((LOG_DEBUG, "key_mature: " 3463 "invalid flag (derived) given to AH SA.\n")); 3464 return EINVAL; 3465 } 3466 if (sav->alg_enc != SADB_EALG_NONE) { 3467 ipseclog((LOG_DEBUG, "key_mature: " 3468 "protocol and algorithm mismated.\n")); 3469 return(EINVAL); 3470 } 3471 error = xform_init(sav, XF_AH); 3472 break; 3473 case IPPROTO_IPCOMP: 3474 if (sav->alg_auth != SADB_AALG_NONE) { 3475 ipseclog((LOG_DEBUG, "key_mature: " 3476 "protocol and algorithm mismated.\n")); 3477 return(EINVAL); 3478 } 3479 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3480 && ntohl(sav->spi) >= 0x10000) { 3481 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3482 return(EINVAL); 3483 } 3484 error = xform_init(sav, XF_IPCOMP); 3485 break; 3486 case IPPROTO_TCP: 3487 if (sav->alg_enc != SADB_EALG_NONE) { 3488 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3489 "mismated.\n", __func__)); 3490 return(EINVAL); 3491 } 3492 error = xform_init(sav, XF_TCPSIGNATURE); 3493 break; 3494 default: 3495 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3496 error = EPROTONOSUPPORT; 3497 break; 3498 } 3499 if (error == 0) 3500 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3501 return (error); 3502 } 3503 3504 /* 3505 * subroutine for SADB_GET and SADB_DUMP. 3506 */ 3507 static struct mbuf * 3508 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3509 u_int32_t seq, u_int32_t pid) 3510 { 3511 struct mbuf *result = NULL, *tres = NULL, *m; 3512 int l = 0; 3513 int i; 3514 void *p; 3515 struct sadb_lifetime lt; 3516 int dumporder[] = { 3517 SADB_EXT_SA, SADB_X_EXT_SA2, 3518 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3519 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3520 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3521 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3522 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3523 #ifdef IPSEC_NAT_T 3524 SADB_X_EXT_NAT_T_TYPE, 3525 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3526 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3527 SADB_X_EXT_NAT_T_FRAG, 3528 #endif 3529 3530 }; 3531 3532 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3533 if (m == NULL) 3534 goto fail; 3535 result = m; 3536 3537 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3538 m = NULL; 3539 p = NULL; 3540 switch (dumporder[i]) { 3541 case SADB_EXT_SA: 3542 m = key_setsadbsa(sav); 3543 break; 3544 3545 case SADB_X_EXT_SA2: 3546 m = key_setsadbxsa2(sav->sah->saidx.mode, 3547 sav->replay ? sav->replay->count : 0, 3548 sav->sah->saidx.reqid); 3549 break; 3550 3551 case SADB_EXT_ADDRESS_SRC: 3552 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3553 &sav->sah->saidx.src.sa, 3554 FULLMASK, IPSEC_ULPROTO_ANY); 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 break; 3562 3563 case SADB_EXT_KEY_AUTH: 3564 if (!sav->key_auth) 3565 continue; 3566 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3567 p = sav->key_auth; 3568 break; 3569 3570 case SADB_EXT_KEY_ENCRYPT: 3571 if (!sav->key_enc) 3572 continue; 3573 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3574 p = sav->key_enc; 3575 break; 3576 3577 case SADB_EXT_LIFETIME_CURRENT: 3578 if (!sav->lft_c) 3579 continue; 3580 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3581 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3582 lt.sadb_lifetime_addtime += time_second - time_uptime; 3583 lt.sadb_lifetime_usetime += time_second - time_uptime; 3584 p = < 3585 break; 3586 3587 case SADB_EXT_LIFETIME_HARD: 3588 if (!sav->lft_h) 3589 continue; 3590 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3591 p = sav->lft_h; 3592 break; 3593 3594 case SADB_EXT_LIFETIME_SOFT: 3595 if (!sav->lft_s) 3596 continue; 3597 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3598 p = sav->lft_s; 3599 break; 3600 3601 #ifdef IPSEC_NAT_T 3602 case SADB_X_EXT_NAT_T_TYPE: 3603 m = key_setsadbxtype(sav->natt_type); 3604 break; 3605 3606 case SADB_X_EXT_NAT_T_DPORT: 3607 if (sav->natt_type == 0) 3608 continue; 3609 m = key_setsadbxport( 3610 key_portfromsaddr(&sav->sah->saidx.dst), 3611 SADB_X_EXT_NAT_T_DPORT); 3612 break; 3613 3614 case SADB_X_EXT_NAT_T_SPORT: 3615 if (sav->natt_type == 0) 3616 continue; 3617 m = key_setsadbxport( 3618 key_portfromsaddr(&sav->sah->saidx.src), 3619 SADB_X_EXT_NAT_T_SPORT); 3620 break; 3621 3622 case SADB_X_EXT_NAT_T_FRAG: 3623 /* don't send frag info if not set */ 3624 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3625 continue; 3626 m = key_setsadbxfrag(sav->esp_frag); 3627 break; 3628 3629 case SADB_X_EXT_NAT_T_OAI: 3630 case SADB_X_EXT_NAT_T_OAR: 3631 continue; 3632 #endif 3633 3634 case SADB_EXT_ADDRESS_PROXY: 3635 case SADB_EXT_IDENTITY_SRC: 3636 case SADB_EXT_IDENTITY_DST: 3637 /* XXX: should we brought from SPD ? */ 3638 case SADB_EXT_SENSITIVITY: 3639 default: 3640 continue; 3641 } 3642 3643 KASSERT(!(m && p)); 3644 if (!m && !p) 3645 goto fail; 3646 if (p && tres) { 3647 M_PREPEND(tres, l, M_DONTWAIT); 3648 if (!tres) 3649 goto fail; 3650 memcpy(mtod(tres, void *), p, l); 3651 continue; 3652 } 3653 if (p) { 3654 m = key_alloc_mbuf(l); 3655 if (!m) 3656 goto fail; 3657 m_copyback(m, 0, l, p); 3658 } 3659 3660 if (tres) 3661 m_cat(m, tres); 3662 tres = m; 3663 } 3664 3665 m_cat(result, tres); 3666 tres = NULL; /* avoid free on error below */ 3667 3668 if (result->m_len < sizeof(struct sadb_msg)) { 3669 result = m_pullup(result, sizeof(struct sadb_msg)); 3670 if (result == NULL) 3671 goto fail; 3672 } 3673 3674 result->m_pkthdr.len = 0; 3675 for (m = result; m; m = m->m_next) 3676 result->m_pkthdr.len += m->m_len; 3677 3678 mtod(result, struct sadb_msg *)->sadb_msg_len = 3679 PFKEY_UNIT64(result->m_pkthdr.len); 3680 3681 return result; 3682 3683 fail: 3684 m_freem(result); 3685 m_freem(tres); 3686 return NULL; 3687 } 3688 3689 3690 #ifdef IPSEC_NAT_T 3691 /* 3692 * set a type in sadb_x_nat_t_type 3693 */ 3694 static struct mbuf * 3695 key_setsadbxtype(u_int16_t type) 3696 { 3697 struct mbuf *m; 3698 size_t len; 3699 struct sadb_x_nat_t_type *p; 3700 3701 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3702 3703 m = key_alloc_mbuf(len); 3704 if (!m || m->m_next) { /*XXX*/ 3705 if (m) 3706 m_freem(m); 3707 return NULL; 3708 } 3709 3710 p = mtod(m, struct sadb_x_nat_t_type *); 3711 3712 memset(p, 0, len); 3713 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3714 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3715 p->sadb_x_nat_t_type_type = type; 3716 3717 return m; 3718 } 3719 /* 3720 * set a port in sadb_x_nat_t_port. port is in network order 3721 */ 3722 static struct mbuf * 3723 key_setsadbxport(u_int16_t port, u_int16_t type) 3724 { 3725 struct mbuf *m; 3726 size_t len; 3727 struct sadb_x_nat_t_port *p; 3728 3729 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3730 3731 m = key_alloc_mbuf(len); 3732 if (!m || m->m_next) { /*XXX*/ 3733 if (m) 3734 m_freem(m); 3735 return NULL; 3736 } 3737 3738 p = mtod(m, struct sadb_x_nat_t_port *); 3739 3740 memset(p, 0, len); 3741 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3742 p->sadb_x_nat_t_port_exttype = type; 3743 p->sadb_x_nat_t_port_port = port; 3744 3745 return m; 3746 } 3747 3748 /* 3749 * set fragmentation info in sadb_x_nat_t_frag 3750 */ 3751 static struct mbuf * 3752 key_setsadbxfrag(u_int16_t flen) 3753 { 3754 struct mbuf *m; 3755 size_t len; 3756 struct sadb_x_nat_t_frag *p; 3757 3758 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3759 3760 m = key_alloc_mbuf(len); 3761 if (!m || m->m_next) { /*XXX*/ 3762 if (m) 3763 m_freem(m); 3764 return NULL; 3765 } 3766 3767 p = mtod(m, struct sadb_x_nat_t_frag *); 3768 3769 memset(p, 0, len); 3770 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3771 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3772 p->sadb_x_nat_t_frag_fraglen = flen; 3773 3774 return m; 3775 } 3776 3777 /* 3778 * Get port from sockaddr, port is in network order 3779 */ 3780 u_int16_t 3781 key_portfromsaddr(const union sockaddr_union *saddr) 3782 { 3783 u_int16_t port; 3784 3785 switch (saddr->sa.sa_family) { 3786 case AF_INET: { 3787 port = saddr->sin.sin_port; 3788 break; 3789 } 3790 #ifdef INET6 3791 case AF_INET6: { 3792 port = saddr->sin6.sin6_port; 3793 break; 3794 } 3795 #endif 3796 default: 3797 printf("key_portfromsaddr: unexpected address family\n"); 3798 port = 0; 3799 break; 3800 } 3801 3802 return port; 3803 } 3804 3805 #endif /* IPSEC_NAT_T */ 3806 3807 /* 3808 * Set port is struct sockaddr. port is in network order 3809 */ 3810 static void 3811 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3812 { 3813 switch (saddr->sa.sa_family) { 3814 case AF_INET: { 3815 saddr->sin.sin_port = port; 3816 break; 3817 } 3818 #ifdef INET6 3819 case AF_INET6: { 3820 saddr->sin6.sin6_port = port; 3821 break; 3822 } 3823 #endif 3824 default: 3825 printf("key_porttosaddr: unexpected address family %d\n", 3826 saddr->sa.sa_family); 3827 break; 3828 } 3829 3830 return; 3831 } 3832 3833 /* 3834 * Safety check sa_len 3835 */ 3836 static int 3837 key_checksalen(const union sockaddr_union *saddr) 3838 { 3839 switch (saddr->sa.sa_family) { 3840 case AF_INET: 3841 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3842 return -1; 3843 break; 3844 #ifdef INET6 3845 case AF_INET6: 3846 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3847 return -1; 3848 break; 3849 #endif 3850 default: 3851 printf("key_checksalen: unexpected sa_family %d\n", 3852 saddr->sa.sa_family); 3853 return -1; 3854 break; 3855 } 3856 return 0; 3857 } 3858 3859 3860 /* 3861 * set data into sadb_msg. 3862 */ 3863 static struct mbuf * 3864 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3865 u_int32_t seq, pid_t pid, u_int16_t reserved) 3866 { 3867 struct mbuf *m; 3868 struct sadb_msg *p; 3869 int len; 3870 3871 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3872 if (len > MCLBYTES) 3873 return NULL; 3874 MGETHDR(m, M_DONTWAIT, MT_DATA); 3875 if (m && len > MHLEN) { 3876 MCLGET(m, M_DONTWAIT); 3877 if ((m->m_flags & M_EXT) == 0) { 3878 m_freem(m); 3879 m = NULL; 3880 } 3881 } 3882 if (!m) 3883 return NULL; 3884 m->m_pkthdr.len = m->m_len = len; 3885 m->m_next = NULL; 3886 3887 p = mtod(m, struct sadb_msg *); 3888 3889 memset(p, 0, len); 3890 p->sadb_msg_version = PF_KEY_V2; 3891 p->sadb_msg_type = type; 3892 p->sadb_msg_errno = 0; 3893 p->sadb_msg_satype = satype; 3894 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3895 p->sadb_msg_reserved = reserved; 3896 p->sadb_msg_seq = seq; 3897 p->sadb_msg_pid = (u_int32_t)pid; 3898 3899 return m; 3900 } 3901 3902 /* 3903 * copy secasvar data into sadb_address. 3904 */ 3905 static struct mbuf * 3906 key_setsadbsa(struct secasvar *sav) 3907 { 3908 struct mbuf *m; 3909 struct sadb_sa *p; 3910 int len; 3911 3912 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3913 m = key_alloc_mbuf(len); 3914 if (!m || m->m_next) { /*XXX*/ 3915 if (m) 3916 m_freem(m); 3917 return NULL; 3918 } 3919 3920 p = mtod(m, struct sadb_sa *); 3921 3922 memset(p, 0, len); 3923 p->sadb_sa_len = PFKEY_UNIT64(len); 3924 p->sadb_sa_exttype = SADB_EXT_SA; 3925 p->sadb_sa_spi = sav->spi; 3926 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3927 p->sadb_sa_state = sav->state; 3928 p->sadb_sa_auth = sav->alg_auth; 3929 p->sadb_sa_encrypt = sav->alg_enc; 3930 p->sadb_sa_flags = sav->flags; 3931 3932 return m; 3933 } 3934 3935 /* 3936 * set data into sadb_address. 3937 */ 3938 static struct mbuf * 3939 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3940 u_int8_t prefixlen, u_int16_t ul_proto) 3941 { 3942 struct mbuf *m; 3943 struct sadb_address *p; 3944 size_t len; 3945 3946 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3947 PFKEY_ALIGN8(saddr->sa_len); 3948 m = key_alloc_mbuf(len); 3949 if (!m || m->m_next) { /*XXX*/ 3950 if (m) 3951 m_freem(m); 3952 return NULL; 3953 } 3954 3955 p = mtod(m, struct sadb_address *); 3956 3957 memset(p, 0, len); 3958 p->sadb_address_len = PFKEY_UNIT64(len); 3959 p->sadb_address_exttype = exttype; 3960 p->sadb_address_proto = ul_proto; 3961 if (prefixlen == FULLMASK) { 3962 switch (saddr->sa_family) { 3963 case AF_INET: 3964 prefixlen = sizeof(struct in_addr) << 3; 3965 break; 3966 case AF_INET6: 3967 prefixlen = sizeof(struct in6_addr) << 3; 3968 break; 3969 default: 3970 ; /*XXX*/ 3971 } 3972 } 3973 p->sadb_address_prefixlen = prefixlen; 3974 p->sadb_address_reserved = 0; 3975 3976 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3977 saddr, saddr->sa_len); 3978 3979 return m; 3980 } 3981 3982 #if 0 3983 /* 3984 * set data into sadb_ident. 3985 */ 3986 static struct mbuf * 3987 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3988 void *string, int stringlen, u_int64_t id) 3989 { 3990 struct mbuf *m; 3991 struct sadb_ident *p; 3992 size_t len; 3993 3994 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3995 m = key_alloc_mbuf(len); 3996 if (!m || m->m_next) { /*XXX*/ 3997 if (m) 3998 m_freem(m); 3999 return NULL; 4000 } 4001 4002 p = mtod(m, struct sadb_ident *); 4003 4004 memset(p, 0, len); 4005 p->sadb_ident_len = PFKEY_UNIT64(len); 4006 p->sadb_ident_exttype = exttype; 4007 p->sadb_ident_type = idtype; 4008 p->sadb_ident_reserved = 0; 4009 p->sadb_ident_id = id; 4010 4011 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 4012 string, stringlen); 4013 4014 return m; 4015 } 4016 #endif 4017 4018 /* 4019 * set data into sadb_x_sa2. 4020 */ 4021 static struct mbuf * 4022 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 4023 { 4024 struct mbuf *m; 4025 struct sadb_x_sa2 *p; 4026 size_t len; 4027 4028 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4029 m = key_alloc_mbuf(len); 4030 if (!m || m->m_next) { /*XXX*/ 4031 if (m) 4032 m_freem(m); 4033 return NULL; 4034 } 4035 4036 p = mtod(m, struct sadb_x_sa2 *); 4037 4038 memset(p, 0, len); 4039 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4040 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4041 p->sadb_x_sa2_mode = mode; 4042 p->sadb_x_sa2_reserved1 = 0; 4043 p->sadb_x_sa2_reserved2 = 0; 4044 p->sadb_x_sa2_sequence = seq; 4045 p->sadb_x_sa2_reqid = reqid; 4046 4047 return m; 4048 } 4049 4050 /* 4051 * set data into sadb_x_policy 4052 */ 4053 static struct mbuf * 4054 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 4055 { 4056 struct mbuf *m; 4057 struct sadb_x_policy *p; 4058 size_t len; 4059 4060 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4061 m = key_alloc_mbuf(len); 4062 if (!m || m->m_next) { /*XXX*/ 4063 if (m) 4064 m_freem(m); 4065 return NULL; 4066 } 4067 4068 p = mtod(m, struct sadb_x_policy *); 4069 4070 memset(p, 0, len); 4071 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4072 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4073 p->sadb_x_policy_type = type; 4074 p->sadb_x_policy_dir = dir; 4075 p->sadb_x_policy_id = id; 4076 4077 return m; 4078 } 4079 4080 /* %%% utilities */ 4081 /* 4082 * copy a buffer into the new buffer allocated. 4083 */ 4084 static void * 4085 key_newbuf(const void *src, u_int len) 4086 { 4087 void *new; 4088 4089 KMALLOC(new, void *, len); 4090 if (new == NULL) { 4091 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 4092 return NULL; 4093 } 4094 memcpy(new, src, len); 4095 4096 return new; 4097 } 4098 4099 /* compare my own address 4100 * OUT: 1: true, i.e. my address. 4101 * 0: false 4102 */ 4103 int 4104 key_ismyaddr(const struct sockaddr *sa) 4105 { 4106 #ifdef INET 4107 const struct sockaddr_in *sin; 4108 const struct in_ifaddr *ia; 4109 #endif 4110 4111 /* sanity check */ 4112 if (sa == NULL) 4113 panic("key_ismyaddr: NULL pointer is passed"); 4114 4115 switch (sa->sa_family) { 4116 #ifdef INET 4117 case AF_INET: 4118 sin = (const struct sockaddr_in *)sa; 4119 for (ia = in_ifaddrhead.tqh_first; ia; 4120 ia = ia->ia_link.tqe_next) 4121 { 4122 if (sin->sin_family == ia->ia_addr.sin_family && 4123 sin->sin_len == ia->ia_addr.sin_len && 4124 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4125 { 4126 return 1; 4127 } 4128 } 4129 break; 4130 #endif 4131 #ifdef INET6 4132 case AF_INET6: 4133 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4134 #endif 4135 } 4136 4137 return 0; 4138 } 4139 4140 #ifdef INET6 4141 /* 4142 * compare my own address for IPv6. 4143 * 1: ours 4144 * 0: other 4145 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4146 */ 4147 #include <netinet6/in6_var.h> 4148 4149 static int 4150 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4151 { 4152 const struct in6_ifaddr *ia; 4153 const struct in6_multi *in6m; 4154 4155 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 4156 if (key_sockaddrcmp((const struct sockaddr *)&sin6, 4157 (const struct sockaddr *)&ia->ia_addr, 0) == 0) 4158 return 1; 4159 4160 /* 4161 * XXX Multicast 4162 * XXX why do we care about multlicast here while we don't care 4163 * about IPv4 multicast?? 4164 * XXX scope 4165 */ 4166 in6m = NULL; 4167 #ifdef __FreeBSD__ 4168 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 4169 #else 4170 for ((in6m) = ia->ia6_multiaddrs.lh_first; 4171 (in6m) != NULL && 4172 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); 4173 (in6m) = in6m->in6m_entry.le_next) 4174 continue; 4175 #endif 4176 if (in6m) 4177 return 1; 4178 } 4179 4180 /* loopback, just for safety */ 4181 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4182 return 1; 4183 4184 return 0; 4185 } 4186 #endif /*INET6*/ 4187 4188 /* 4189 * compare two secasindex structure. 4190 * flag can specify to compare 2 saidxes. 4191 * compare two secasindex structure without both mode and reqid. 4192 * don't compare port. 4193 * IN: 4194 * saidx0: source, it can be in SAD. 4195 * saidx1: object. 4196 * OUT: 4197 * 1 : equal 4198 * 0 : not equal 4199 */ 4200 static int 4201 key_cmpsaidx( 4202 const struct secasindex *saidx0, 4203 const struct secasindex *saidx1, 4204 int flag) 4205 { 4206 int chkport = 0; 4207 4208 /* sanity */ 4209 if (saidx0 == NULL && saidx1 == NULL) 4210 return 1; 4211 4212 if (saidx0 == NULL || saidx1 == NULL) 4213 return 0; 4214 4215 if (saidx0->proto != saidx1->proto) 4216 return 0; 4217 4218 if (flag == CMP_EXACTLY) { 4219 if (saidx0->mode != saidx1->mode) 4220 return 0; 4221 if (saidx0->reqid != saidx1->reqid) 4222 return 0; 4223 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4224 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4225 return 0; 4226 } else { 4227 4228 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4229 if (flag == CMP_MODE_REQID 4230 ||flag == CMP_REQID) { 4231 /* 4232 * If reqid of SPD is non-zero, unique SA is required. 4233 * The result must be of same reqid in this case. 4234 */ 4235 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4236 return 0; 4237 } 4238 4239 if (flag == CMP_MODE_REQID) { 4240 if (saidx0->mode != IPSEC_MODE_ANY 4241 && saidx0->mode != saidx1->mode) 4242 return 0; 4243 } 4244 4245 /* 4246 * If NAT-T is enabled, check ports for tunnel mode. 4247 * Don't do it for transport mode, as there is no 4248 * port information available in the SP. 4249 * Also don't check ports if they are set to zero 4250 * in the SPD: This means we have a non-generated 4251 * SPD which can't know UDP ports. 4252 */ 4253 #ifdef IPSEC_NAT_T 4254 if (saidx1->mode == IPSEC_MODE_TUNNEL && 4255 ((((const struct sockaddr *)(&saidx1->src))->sa_family == AF_INET && 4256 ((const struct sockaddr *)(&saidx1->dst))->sa_family == AF_INET && 4257 ((const struct sockaddr_in *)(&saidx1->src))->sin_port && 4258 ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) || 4259 (((const struct sockaddr *)(&saidx1->src))->sa_family == AF_INET6 && 4260 ((const struct sockaddr *)(&saidx1->dst))->sa_family == AF_INET6 && 4261 ((const struct sockaddr_in6 *)(&saidx1->src))->sin6_port && 4262 ((const struct sockaddr_in6 *)(&saidx1->dst))->sin6_port))) 4263 chkport = 1; 4264 #endif 4265 4266 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4267 return 0; 4268 } 4269 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4270 return 0; 4271 } 4272 } 4273 4274 return 1; 4275 } 4276 4277 /* 4278 * compare two secindex structure exactly. 4279 * IN: 4280 * spidx0: source, it is often in SPD. 4281 * spidx1: object, it is often from PFKEY message. 4282 * OUT: 4283 * 1 : equal 4284 * 0 : not equal 4285 */ 4286 int 4287 key_cmpspidx_exactly( 4288 const struct secpolicyindex *spidx0, 4289 const struct secpolicyindex *spidx1) 4290 { 4291 /* sanity */ 4292 if (spidx0 == NULL && spidx1 == NULL) 4293 return 1; 4294 4295 if (spidx0 == NULL || spidx1 == NULL) 4296 return 0; 4297 4298 if (spidx0->prefs != spidx1->prefs 4299 || spidx0->prefd != spidx1->prefd 4300 || spidx0->ul_proto != spidx1->ul_proto) 4301 return 0; 4302 4303 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4304 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4305 } 4306 4307 /* 4308 * compare two secindex structure with mask. 4309 * IN: 4310 * spidx0: source, it is often in SPD. 4311 * spidx1: object, it is often from IP header. 4312 * OUT: 4313 * 1 : equal 4314 * 0 : not equal 4315 */ 4316 int 4317 key_cmpspidx_withmask( 4318 const struct secpolicyindex *spidx0, 4319 const struct secpolicyindex *spidx1) 4320 { 4321 /* sanity */ 4322 if (spidx0 == NULL && spidx1 == NULL) 4323 return 1; 4324 4325 if (spidx0 == NULL || spidx1 == NULL) 4326 return 0; 4327 4328 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4329 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4330 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4331 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4332 return 0; 4333 4334 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4335 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4336 && spidx0->ul_proto != spidx1->ul_proto) 4337 return 0; 4338 4339 switch (spidx0->src.sa.sa_family) { 4340 case AF_INET: 4341 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4342 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4343 return 0; 4344 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4345 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4346 return 0; 4347 break; 4348 case AF_INET6: 4349 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4350 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4351 return 0; 4352 /* 4353 * scope_id check. if sin6_scope_id is 0, we regard it 4354 * as a wildcard scope, which matches any scope zone ID. 4355 */ 4356 if (spidx0->src.sin6.sin6_scope_id && 4357 spidx1->src.sin6.sin6_scope_id && 4358 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4359 return 0; 4360 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4361 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4362 return 0; 4363 break; 4364 default: 4365 /* XXX */ 4366 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4367 return 0; 4368 break; 4369 } 4370 4371 switch (spidx0->dst.sa.sa_family) { 4372 case AF_INET: 4373 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4374 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4375 return 0; 4376 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4377 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4378 return 0; 4379 break; 4380 case AF_INET6: 4381 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4382 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4383 return 0; 4384 /* 4385 * scope_id check. if sin6_scope_id is 0, we regard it 4386 * as a wildcard scope, which matches any scope zone ID. 4387 */ 4388 if (spidx0->src.sin6.sin6_scope_id && 4389 spidx1->src.sin6.sin6_scope_id && 4390 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4391 return 0; 4392 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4393 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4394 return 0; 4395 break; 4396 default: 4397 /* XXX */ 4398 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4399 return 0; 4400 break; 4401 } 4402 4403 /* XXX Do we check other field ? e.g. flowinfo */ 4404 4405 return 1; 4406 } 4407 4408 /* returns 0 on match */ 4409 static int 4410 key_sockaddrcmp( 4411 const struct sockaddr *sa1, 4412 const struct sockaddr *sa2, 4413 int port) 4414 { 4415 #ifdef satosin 4416 #undef satosin 4417 #endif 4418 #define satosin(s) ((const struct sockaddr_in *)s) 4419 #ifdef satosin6 4420 #undef satosin6 4421 #endif 4422 #define satosin6(s) ((const struct sockaddr_in6 *)s) 4423 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4424 return 1; 4425 4426 switch (sa1->sa_family) { 4427 case AF_INET: 4428 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4429 return 1; 4430 if (satosin(sa1)->sin_addr.s_addr != 4431 satosin(sa2)->sin_addr.s_addr) { 4432 return 1; 4433 } 4434 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4435 return 1; 4436 break; 4437 case AF_INET6: 4438 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4439 return 1; /*EINVAL*/ 4440 if (satosin6(sa1)->sin6_scope_id != 4441 satosin6(sa2)->sin6_scope_id) { 4442 return 1; 4443 } 4444 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4445 &satosin6(sa2)->sin6_addr)) { 4446 return 1; 4447 } 4448 if (port && 4449 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4450 return 1; 4451 } 4452 break; 4453 default: 4454 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4455 return 1; 4456 break; 4457 } 4458 4459 return 0; 4460 #undef satosin 4461 #undef satosin6 4462 } 4463 4464 /* 4465 * compare two buffers with mask. 4466 * IN: 4467 * addr1: source 4468 * addr2: object 4469 * bits: Number of bits to compare 4470 * OUT: 4471 * 1 : equal 4472 * 0 : not equal 4473 */ 4474 static int 4475 key_bbcmp(const void *a1, const void *a2, u_int bits) 4476 { 4477 const unsigned char *p1 = a1; 4478 const unsigned char *p2 = a2; 4479 4480 /* XXX: This could be considerably faster if we compare a word 4481 * at a time, but it is complicated on LSB Endian machines */ 4482 4483 /* Handle null pointers */ 4484 if (p1 == NULL || p2 == NULL) 4485 return (p1 == p2); 4486 4487 while (bits >= 8) { 4488 if (*p1++ != *p2++) 4489 return 0; 4490 bits -= 8; 4491 } 4492 4493 if (bits > 0) { 4494 u_int8_t mask = ~((1<<(8-bits))-1); 4495 if ((*p1 & mask) != (*p2 & mask)) 4496 return 0; 4497 } 4498 return 1; /* Match! */ 4499 } 4500 4501 /* 4502 * time handler. 4503 * scanning SPD and SAD to check status for each entries, 4504 * and do to remove or to expire. 4505 */ 4506 void 4507 key_timehandler(void* arg) 4508 { 4509 u_int dir; 4510 int s; 4511 time_t now = time_uptime; 4512 4513 s = splsoftnet(); /*called from softclock()*/ 4514 mutex_enter(softnet_lock); 4515 4516 /* SPD */ 4517 { 4518 struct secpolicy *sp, *nextsp; 4519 4520 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4521 for (sp = LIST_FIRST(&sptree[dir]); 4522 sp != NULL; 4523 sp = nextsp) { 4524 4525 nextsp = LIST_NEXT(sp, chain); 4526 4527 if (sp->state == IPSEC_SPSTATE_DEAD) { 4528 key_sp_unlink(sp); /*XXX*/ 4529 4530 /* 'sp' dead; continue transfers to 4531 * 'sp = nextsp' 4532 */ 4533 continue; 4534 } 4535 4536 if (sp->lifetime == 0 && sp->validtime == 0) 4537 continue; 4538 4539 /* the deletion will occur next time */ 4540 if ((sp->lifetime && now - sp->created > sp->lifetime) 4541 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4542 key_sp_dead(sp); 4543 key_spdexpire(sp); 4544 continue; 4545 } 4546 } 4547 } 4548 } 4549 4550 /* SAD */ 4551 { 4552 struct secashead *sah, *nextsah; 4553 struct secasvar *sav, *nextsav; 4554 4555 for (sah = LIST_FIRST(&sahtree); 4556 sah != NULL; 4557 sah = nextsah) { 4558 4559 nextsah = LIST_NEXT(sah, chain); 4560 4561 /* if sah has been dead, then delete it and process next sah. */ 4562 if (sah->state == SADB_SASTATE_DEAD) { 4563 key_delsah(sah); 4564 continue; 4565 } 4566 4567 /* if LARVAL entry doesn't become MATURE, delete it. */ 4568 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4569 sav != NULL; 4570 sav = nextsav) { 4571 4572 nextsav = LIST_NEXT(sav, chain); 4573 4574 if (now - sav->created > key_larval_lifetime) { 4575 KEY_FREESAV(&sav); 4576 } 4577 } 4578 4579 /* 4580 * check MATURE entry to start to send expire message 4581 * whether or not. 4582 */ 4583 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4584 sav != NULL; 4585 sav = nextsav) { 4586 4587 nextsav = LIST_NEXT(sav, chain); 4588 4589 /* we don't need to check. */ 4590 if (sav->lft_s == NULL) 4591 continue; 4592 4593 /* sanity check */ 4594 if (sav->lft_c == NULL) { 4595 ipseclog((LOG_DEBUG,"key_timehandler: " 4596 "There is no CURRENT time, why?\n")); 4597 continue; 4598 } 4599 4600 /* check SOFT lifetime */ 4601 if (sav->lft_s->sadb_lifetime_addtime != 0 4602 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4603 /* 4604 * check SA to be used whether or not. 4605 * when SA hasn't been used, delete it. 4606 */ 4607 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4608 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4609 KEY_FREESAV(&sav); 4610 } else { 4611 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4612 /* 4613 * XXX If we keep to send expire 4614 * message in the status of 4615 * DYING. Do remove below code. 4616 */ 4617 key_expire(sav); 4618 } 4619 } 4620 /* check SOFT lifetime by bytes */ 4621 /* 4622 * XXX I don't know the way to delete this SA 4623 * when new SA is installed. Caution when it's 4624 * installed too big lifetime by time. 4625 */ 4626 else if (sav->lft_s->sadb_lifetime_bytes != 0 4627 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4628 4629 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4630 /* 4631 * XXX If we keep to send expire 4632 * message in the status of 4633 * DYING. Do remove below code. 4634 */ 4635 key_expire(sav); 4636 } 4637 } 4638 4639 /* check DYING entry to change status to DEAD. */ 4640 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4641 sav != NULL; 4642 sav = nextsav) { 4643 4644 nextsav = LIST_NEXT(sav, chain); 4645 4646 /* we don't need to check. */ 4647 if (sav->lft_h == NULL) 4648 continue; 4649 4650 /* sanity check */ 4651 if (sav->lft_c == NULL) { 4652 ipseclog((LOG_DEBUG, "key_timehandler: " 4653 "There is no CURRENT time, why?\n")); 4654 continue; 4655 } 4656 4657 if (sav->lft_h->sadb_lifetime_addtime != 0 4658 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4659 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4660 KEY_FREESAV(&sav); 4661 } 4662 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4663 else if (sav->lft_s != NULL 4664 && sav->lft_s->sadb_lifetime_addtime != 0 4665 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4666 /* 4667 * XXX: should be checked to be 4668 * installed the valid SA. 4669 */ 4670 4671 /* 4672 * If there is no SA then sending 4673 * expire message. 4674 */ 4675 key_expire(sav); 4676 } 4677 #endif 4678 /* check HARD lifetime by bytes */ 4679 else if (sav->lft_h->sadb_lifetime_bytes != 0 4680 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4681 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4682 KEY_FREESAV(&sav); 4683 } 4684 } 4685 4686 /* delete entry in DEAD */ 4687 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4688 sav != NULL; 4689 sav = nextsav) { 4690 4691 nextsav = LIST_NEXT(sav, chain); 4692 4693 /* sanity check */ 4694 if (sav->state != SADB_SASTATE_DEAD) { 4695 ipseclog((LOG_DEBUG, "key_timehandler: " 4696 "invalid sav->state " 4697 "(queue: %d SA: %d): " 4698 "kill it anyway\n", 4699 SADB_SASTATE_DEAD, sav->state)); 4700 } 4701 4702 /* 4703 * do not call key_freesav() here. 4704 * sav should already be freed, and sav->refcnt 4705 * shows other references to sav 4706 * (such as from SPD). 4707 */ 4708 } 4709 } 4710 } 4711 4712 #ifndef IPSEC_NONBLOCK_ACQUIRE 4713 /* ACQ tree */ 4714 { 4715 struct secacq *acq, *nextacq; 4716 4717 for (acq = LIST_FIRST(&acqtree); 4718 acq != NULL; 4719 acq = nextacq) { 4720 4721 nextacq = LIST_NEXT(acq, chain); 4722 4723 if (now - acq->created > key_blockacq_lifetime 4724 && __LIST_CHAINED(acq)) { 4725 LIST_REMOVE(acq, chain); 4726 KFREE(acq); 4727 } 4728 } 4729 } 4730 #endif 4731 4732 /* SP ACQ tree */ 4733 { 4734 struct secspacq *acq, *nextacq; 4735 4736 for (acq = LIST_FIRST(&spacqtree); 4737 acq != NULL; 4738 acq = nextacq) { 4739 4740 nextacq = LIST_NEXT(acq, chain); 4741 4742 if (now - acq->created > key_blockacq_lifetime 4743 && __LIST_CHAINED(acq)) { 4744 LIST_REMOVE(acq, chain); 4745 KFREE(acq); 4746 } 4747 } 4748 } 4749 4750 #ifndef IPSEC_DEBUG2 4751 /* do exchange to tick time !! */ 4752 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4753 #endif /* IPSEC_DEBUG2 */ 4754 4755 mutex_exit(softnet_lock); 4756 splx(s); 4757 return; 4758 } 4759 4760 u_long 4761 key_random(void) 4762 { 4763 u_long value; 4764 4765 key_randomfill(&value, sizeof(value)); 4766 return value; 4767 } 4768 4769 void 4770 key_randomfill(void *p, size_t l) 4771 { 4772 4773 cprng_fast(p, l); 4774 } 4775 4776 /* 4777 * map SADB_SATYPE_* to IPPROTO_*. 4778 * if satype == SADB_SATYPE then satype is mapped to ~0. 4779 * OUT: 4780 * 0: invalid satype. 4781 */ 4782 static u_int16_t 4783 key_satype2proto(u_int8_t satype) 4784 { 4785 switch (satype) { 4786 case SADB_SATYPE_UNSPEC: 4787 return IPSEC_PROTO_ANY; 4788 case SADB_SATYPE_AH: 4789 return IPPROTO_AH; 4790 case SADB_SATYPE_ESP: 4791 return IPPROTO_ESP; 4792 case SADB_X_SATYPE_IPCOMP: 4793 return IPPROTO_IPCOMP; 4794 case SADB_X_SATYPE_TCPSIGNATURE: 4795 return IPPROTO_TCP; 4796 default: 4797 return 0; 4798 } 4799 /* NOTREACHED */ 4800 } 4801 4802 /* 4803 * map IPPROTO_* to SADB_SATYPE_* 4804 * OUT: 4805 * 0: invalid protocol type. 4806 */ 4807 static u_int8_t 4808 key_proto2satype(u_int16_t proto) 4809 { 4810 switch (proto) { 4811 case IPPROTO_AH: 4812 return SADB_SATYPE_AH; 4813 case IPPROTO_ESP: 4814 return SADB_SATYPE_ESP; 4815 case IPPROTO_IPCOMP: 4816 return SADB_X_SATYPE_IPCOMP; 4817 case IPPROTO_TCP: 4818 return SADB_X_SATYPE_TCPSIGNATURE; 4819 default: 4820 return 0; 4821 } 4822 /* NOTREACHED */ 4823 } 4824 4825 static int 4826 key_setsecasidx(int proto, int mode, int reqid, 4827 const struct sadb_address * src, 4828 const struct sadb_address * dst, 4829 struct secasindex * saidx) 4830 { 4831 const union sockaddr_union * src_u = 4832 (const union sockaddr_union *) src; 4833 const union sockaddr_union * dst_u = 4834 (const union sockaddr_union *) dst; 4835 4836 /* sa len safety check */ 4837 if (key_checksalen(src_u) != 0) 4838 return -1; 4839 if (key_checksalen(dst_u) != 0) 4840 return -1; 4841 4842 memset(saidx, 0, sizeof(*saidx)); 4843 saidx->proto = proto; 4844 saidx->mode = mode; 4845 saidx->reqid = reqid; 4846 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4847 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4848 4849 #ifndef IPSEC_NAT_T 4850 key_porttosaddr(&((saidx)->src),0); 4851 key_porttosaddr(&((saidx)->dst),0); 4852 #endif 4853 return 0; 4854 } 4855 4856 /* %%% PF_KEY */ 4857 /* 4858 * SADB_GETSPI processing is to receive 4859 * <base, (SA2), src address, dst address, (SPI range)> 4860 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4861 * tree with the status of LARVAL, and send 4862 * <base, SA(*), address(SD)> 4863 * to the IKMPd. 4864 * 4865 * IN: mhp: pointer to the pointer to each header. 4866 * OUT: NULL if fail. 4867 * other if success, return pointer to the message to send. 4868 */ 4869 static int 4870 key_getspi(struct socket *so, struct mbuf *m, 4871 const struct sadb_msghdr *mhp) 4872 { 4873 struct sadb_address *src0, *dst0; 4874 struct secasindex saidx; 4875 struct secashead *newsah; 4876 struct secasvar *newsav; 4877 u_int8_t proto; 4878 u_int32_t spi; 4879 u_int8_t mode; 4880 u_int16_t reqid; 4881 int error; 4882 4883 /* sanity check */ 4884 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4885 panic("key_getspi: NULL pointer is passed"); 4886 4887 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4888 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4889 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4890 return key_senderror(so, m, EINVAL); 4891 } 4892 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4893 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4894 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4895 return key_senderror(so, m, EINVAL); 4896 } 4897 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4898 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4899 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4900 } else { 4901 mode = IPSEC_MODE_ANY; 4902 reqid = 0; 4903 } 4904 4905 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4906 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4907 4908 /* map satype to proto */ 4909 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4910 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4911 return key_senderror(so, m, EINVAL); 4912 } 4913 4914 4915 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 4916 dst0 + 1, &saidx)) != 0) 4917 return key_senderror(so, m, EINVAL); 4918 4919 #ifdef IPSEC_NAT_T 4920 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 4921 return key_senderror(so, m, EINVAL); 4922 #endif 4923 4924 /* SPI allocation */ 4925 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4926 &saidx); 4927 if (spi == 0) 4928 return key_senderror(so, m, EINVAL); 4929 4930 /* get a SA index */ 4931 if ((newsah = key_getsah(&saidx)) == NULL) { 4932 /* create a new SA index */ 4933 if ((newsah = key_newsah(&saidx)) == NULL) { 4934 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4935 return key_senderror(so, m, ENOBUFS); 4936 } 4937 } 4938 4939 /* get a new SA */ 4940 /* XXX rewrite */ 4941 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4942 if (newsav == NULL) { 4943 /* XXX don't free new SA index allocated in above. */ 4944 return key_senderror(so, m, error); 4945 } 4946 4947 /* set spi */ 4948 newsav->spi = htonl(spi); 4949 4950 #ifndef IPSEC_NONBLOCK_ACQUIRE 4951 /* delete the entry in acqtree */ 4952 if (mhp->msg->sadb_msg_seq != 0) { 4953 struct secacq *acq; 4954 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4955 /* reset counter in order to deletion by timehandler. */ 4956 acq->created = time_uptime; 4957 acq->count = 0; 4958 } 4959 } 4960 #endif 4961 4962 { 4963 struct mbuf *n, *nn; 4964 struct sadb_sa *m_sa; 4965 struct sadb_msg *newmsg; 4966 int off, len; 4967 4968 /* create new sadb_msg to reply. */ 4969 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4970 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4971 if (len > MCLBYTES) 4972 return key_senderror(so, m, ENOBUFS); 4973 4974 MGETHDR(n, M_DONTWAIT, MT_DATA); 4975 if (len > MHLEN) { 4976 MCLGET(n, M_DONTWAIT); 4977 if ((n->m_flags & M_EXT) == 0) { 4978 m_freem(n); 4979 n = NULL; 4980 } 4981 } 4982 if (!n) 4983 return key_senderror(so, m, ENOBUFS); 4984 4985 n->m_len = len; 4986 n->m_next = NULL; 4987 off = 0; 4988 4989 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4990 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4991 4992 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4993 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4994 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4995 m_sa->sadb_sa_spi = htonl(spi); 4996 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4997 4998 #ifdef DIAGNOSTIC 4999 if (off != len) 5000 panic("length inconsistency in key_getspi"); 5001 #endif 5002 5003 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 5004 SADB_EXT_ADDRESS_DST); 5005 if (!n->m_next) { 5006 m_freem(n); 5007 return key_senderror(so, m, ENOBUFS); 5008 } 5009 5010 if (n->m_len < sizeof(struct sadb_msg)) { 5011 n = m_pullup(n, sizeof(struct sadb_msg)); 5012 if (n == NULL) 5013 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 5014 } 5015 5016 n->m_pkthdr.len = 0; 5017 for (nn = n; nn; nn = nn->m_next) 5018 n->m_pkthdr.len += nn->m_len; 5019 5020 newmsg = mtod(n, struct sadb_msg *); 5021 newmsg->sadb_msg_seq = newsav->seq; 5022 newmsg->sadb_msg_errno = 0; 5023 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5024 5025 m_freem(m); 5026 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5027 } 5028 } 5029 5030 /* 5031 * allocating new SPI 5032 * called by key_getspi(). 5033 * OUT: 5034 * 0: failure. 5035 * others: success. 5036 */ 5037 static u_int32_t 5038 key_do_getnewspi(const struct sadb_spirange *spirange, 5039 const struct secasindex *saidx) 5040 { 5041 u_int32_t newspi; 5042 u_int32_t spmin, spmax; 5043 int count = key_spi_trycnt; 5044 5045 /* set spi range to allocate */ 5046 if (spirange != NULL) { 5047 spmin = spirange->sadb_spirange_min; 5048 spmax = spirange->sadb_spirange_max; 5049 } else { 5050 spmin = key_spi_minval; 5051 spmax = key_spi_maxval; 5052 } 5053 /* IPCOMP needs 2-byte SPI */ 5054 if (saidx->proto == IPPROTO_IPCOMP) { 5055 u_int32_t t; 5056 if (spmin >= 0x10000) 5057 spmin = 0xffff; 5058 if (spmax >= 0x10000) 5059 spmax = 0xffff; 5060 if (spmin > spmax) { 5061 t = spmin; spmin = spmax; spmax = t; 5062 } 5063 } 5064 5065 if (spmin == spmax) { 5066 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5067 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 5068 return 0; 5069 } 5070 5071 count--; /* taking one cost. */ 5072 newspi = spmin; 5073 5074 } else { 5075 5076 /* init SPI */ 5077 newspi = 0; 5078 5079 /* when requesting to allocate spi ranged */ 5080 while (count--) { 5081 /* generate pseudo-random SPI value ranged. */ 5082 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5083 5084 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5085 break; 5086 } 5087 5088 if (count == 0 || newspi == 0) { 5089 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 5090 return 0; 5091 } 5092 } 5093 5094 /* statistics */ 5095 keystat.getspi_count = 5096 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5097 5098 return newspi; 5099 } 5100 5101 #ifdef IPSEC_NAT_T 5102 /* Handle IPSEC_NAT_T info if present */ 5103 static int 5104 key_handle_natt_info(struct secasvar *sav, 5105 const struct sadb_msghdr *mhp) 5106 { 5107 5108 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5109 ipseclog((LOG_DEBUG,"update: NAT-T OAi present\n")); 5110 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5111 ipseclog((LOG_DEBUG,"update: NAT-T OAr present\n")); 5112 5113 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5114 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5115 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5116 struct sadb_x_nat_t_type *type; 5117 struct sadb_x_nat_t_port *sport; 5118 struct sadb_x_nat_t_port *dport; 5119 struct sadb_address *iaddr, *raddr; 5120 struct sadb_x_nat_t_frag *frag; 5121 5122 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5123 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5124 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5125 ipseclog((LOG_DEBUG, "key_update: " 5126 "invalid message.\n")); 5127 return -1; 5128 } 5129 5130 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 5131 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 5132 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5133 return -1; 5134 } 5135 5136 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 5137 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 5138 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5139 return -1; 5140 } 5141 5142 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 5143 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 5144 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5145 return -1; 5146 } 5147 5148 type = (struct sadb_x_nat_t_type *) 5149 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5150 sport = (struct sadb_x_nat_t_port *) 5151 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5152 dport = (struct sadb_x_nat_t_port *) 5153 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5154 iaddr = (struct sadb_address *) 5155 mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5156 raddr = (struct sadb_address *) 5157 mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5158 frag = (struct sadb_x_nat_t_frag *) 5159 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5160 5161 ipseclog((LOG_DEBUG, 5162 "key_update: type %d, sport = %d, dport = %d\n", 5163 type->sadb_x_nat_t_type_type, 5164 sport->sadb_x_nat_t_port_port, 5165 dport->sadb_x_nat_t_port_port)); 5166 5167 if (type) 5168 sav->natt_type = type->sadb_x_nat_t_type_type; 5169 if (sport) 5170 key_porttosaddr(&sav->sah->saidx.src, 5171 sport->sadb_x_nat_t_port_port); 5172 if (dport) 5173 key_porttosaddr(&sav->sah->saidx.dst, 5174 dport->sadb_x_nat_t_port_port); 5175 if (frag) 5176 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5177 else 5178 sav->esp_frag = IP_MAXPACKET; 5179 } 5180 5181 return 0; 5182 } 5183 5184 /* Just update the IPSEC_NAT_T ports if present */ 5185 static int 5186 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5187 const struct sadb_msghdr *mhp) 5188 { 5189 5190 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5191 ipseclog((LOG_DEBUG,"update: NAT-T OAi present\n")); 5192 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5193 ipseclog((LOG_DEBUG,"update: NAT-T OAr present\n")); 5194 5195 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5196 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5197 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5198 struct sadb_x_nat_t_type *type; 5199 struct sadb_x_nat_t_port *sport; 5200 struct sadb_x_nat_t_port *dport; 5201 5202 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5203 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5204 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5205 ipseclog((LOG_DEBUG, "key_update: " 5206 "invalid message.\n")); 5207 return -1; 5208 } 5209 5210 sport = (struct sadb_x_nat_t_port *) 5211 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5212 dport = (struct sadb_x_nat_t_port *) 5213 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5214 5215 if (sport) 5216 key_porttosaddr(src, 5217 sport->sadb_x_nat_t_port_port); 5218 if (dport) 5219 key_porttosaddr(dst, 5220 dport->sadb_x_nat_t_port_port); 5221 } 5222 5223 return 0; 5224 } 5225 #endif 5226 5227 5228 /* 5229 * SADB_UPDATE processing 5230 * receive 5231 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5232 * key(AE), (identity(SD),) (sensitivity)> 5233 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5234 * and send 5235 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5236 * (identity(SD),) (sensitivity)> 5237 * to the ikmpd. 5238 * 5239 * m will always be freed. 5240 */ 5241 static int 5242 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5243 { 5244 struct sadb_sa *sa0; 5245 struct sadb_address *src0, *dst0; 5246 struct secasindex saidx; 5247 struct secashead *sah; 5248 struct secasvar *sav; 5249 u_int16_t proto; 5250 u_int8_t mode; 5251 u_int16_t reqid; 5252 int error; 5253 5254 /* sanity check */ 5255 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5256 panic("key_update: NULL pointer is passed"); 5257 5258 /* map satype to proto */ 5259 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5260 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 5261 return key_senderror(so, m, EINVAL); 5262 } 5263 5264 if (mhp->ext[SADB_EXT_SA] == NULL || 5265 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5266 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5267 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5268 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5269 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5270 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5271 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5272 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5273 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5274 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5275 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5276 return key_senderror(so, m, EINVAL); 5277 } 5278 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5279 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5280 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5281 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5282 return key_senderror(so, m, EINVAL); 5283 } 5284 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5285 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5286 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5287 } else { 5288 mode = IPSEC_MODE_ANY; 5289 reqid = 0; 5290 } 5291 /* XXX boundary checking for other extensions */ 5292 5293 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5294 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5295 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5296 5297 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5298 dst0 + 1, &saidx)) != 0) 5299 return key_senderror(so, m, EINVAL); 5300 5301 #ifdef IPSEC_NAT_T 5302 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5303 return key_senderror(so, m, EINVAL); 5304 #endif 5305 5306 /* get a SA header */ 5307 if ((sah = key_getsah(&saidx)) == NULL) { 5308 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 5309 return key_senderror(so, m, ENOENT); 5310 } 5311 5312 /* set spidx if there */ 5313 /* XXX rewrite */ 5314 error = key_setident(sah, m, mhp); 5315 if (error) 5316 return key_senderror(so, m, error); 5317 5318 /* find a SA with sequence number. */ 5319 #ifdef IPSEC_DOSEQCHECK 5320 if (mhp->msg->sadb_msg_seq != 0 5321 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5322 ipseclog((LOG_DEBUG, 5323 "key_update: no larval SA with sequence %u exists.\n", 5324 mhp->msg->sadb_msg_seq)); 5325 return key_senderror(so, m, ENOENT); 5326 } 5327 #else 5328 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 5329 ipseclog((LOG_DEBUG, 5330 "key_update: no such a SA found (spi:%u)\n", 5331 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5332 return key_senderror(so, m, EINVAL); 5333 } 5334 #endif 5335 5336 /* validity check */ 5337 if (sav->sah->saidx.proto != proto) { 5338 ipseclog((LOG_DEBUG, 5339 "key_update: protocol mismatched (DB=%u param=%u)\n", 5340 sav->sah->saidx.proto, proto)); 5341 return key_senderror(so, m, EINVAL); 5342 } 5343 #ifdef IPSEC_DOSEQCHECK 5344 if (sav->spi != sa0->sadb_sa_spi) { 5345 ipseclog((LOG_DEBUG, 5346 "key_update: SPI mismatched (DB:%u param:%u)\n", 5347 (u_int32_t)ntohl(sav->spi), 5348 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5349 return key_senderror(so, m, EINVAL); 5350 } 5351 #endif 5352 if (sav->pid != mhp->msg->sadb_msg_pid) { 5353 ipseclog((LOG_DEBUG, 5354 "key_update: pid mismatched (DB:%u param:%u)\n", 5355 sav->pid, mhp->msg->sadb_msg_pid)); 5356 return key_senderror(so, m, EINVAL); 5357 } 5358 5359 /* copy sav values */ 5360 error = key_setsaval(sav, m, mhp); 5361 if (error) { 5362 KEY_FREESAV(&sav); 5363 return key_senderror(so, m, error); 5364 } 5365 5366 #ifdef IPSEC_NAT_T 5367 if ((error = key_handle_natt_info(sav,mhp)) != 0) 5368 return key_senderror(so, m, EINVAL); 5369 #endif /* IPSEC_NAT_T */ 5370 5371 /* check SA values to be mature. */ 5372 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5373 KEY_FREESAV(&sav); 5374 return key_senderror(so, m, 0); 5375 } 5376 5377 { 5378 struct mbuf *n; 5379 5380 /* set msg buf from mhp */ 5381 n = key_getmsgbuf_x1(m, mhp); 5382 if (n == NULL) { 5383 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5384 return key_senderror(so, m, ENOBUFS); 5385 } 5386 5387 m_freem(m); 5388 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5389 } 5390 } 5391 5392 /* 5393 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5394 * only called by key_update(). 5395 * OUT: 5396 * NULL : not found 5397 * others : found, pointer to a SA. 5398 */ 5399 #ifdef IPSEC_DOSEQCHECK 5400 static struct secasvar * 5401 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5402 { 5403 struct secasvar *sav; 5404 u_int state; 5405 5406 state = SADB_SASTATE_LARVAL; 5407 5408 /* search SAD with sequence number ? */ 5409 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5410 5411 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5412 5413 if (sav->seq == seq) { 5414 SA_ADDREF(sav); 5415 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5416 printf("DP key_getsavbyseq cause " 5417 "refcnt++:%d SA:%p\n", 5418 sav->refcnt, sav)); 5419 return sav; 5420 } 5421 } 5422 5423 return NULL; 5424 } 5425 #endif 5426 5427 /* 5428 * SADB_ADD processing 5429 * add an entry to SA database, when received 5430 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5431 * key(AE), (identity(SD),) (sensitivity)> 5432 * from the ikmpd, 5433 * and send 5434 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5435 * (identity(SD),) (sensitivity)> 5436 * to the ikmpd. 5437 * 5438 * IGNORE identity and sensitivity messages. 5439 * 5440 * m will always be freed. 5441 */ 5442 static int 5443 key_add(struct socket *so, struct mbuf *m, 5444 const struct sadb_msghdr *mhp) 5445 { 5446 struct sadb_sa *sa0; 5447 struct sadb_address *src0, *dst0; 5448 struct secasindex saidx; 5449 struct secashead *newsah; 5450 struct secasvar *newsav; 5451 u_int16_t proto; 5452 u_int8_t mode; 5453 u_int16_t reqid; 5454 int error; 5455 5456 /* sanity check */ 5457 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5458 panic("key_add: NULL pointer is passed"); 5459 5460 /* map satype to proto */ 5461 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5462 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5463 return key_senderror(so, m, EINVAL); 5464 } 5465 5466 if (mhp->ext[SADB_EXT_SA] == NULL || 5467 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5468 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5469 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5470 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5471 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5472 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5473 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5474 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5475 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5476 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5477 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5478 return key_senderror(so, m, EINVAL); 5479 } 5480 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5481 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5482 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5483 /* XXX need more */ 5484 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5485 return key_senderror(so, m, EINVAL); 5486 } 5487 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5488 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5489 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5490 } else { 5491 mode = IPSEC_MODE_ANY; 5492 reqid = 0; 5493 } 5494 5495 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5496 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5497 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5498 5499 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5500 dst0 + 1, &saidx)) != 0) 5501 return key_senderror(so, m, EINVAL); 5502 5503 #ifdef IPSEC_NAT_T 5504 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5505 return key_senderror(so, m, EINVAL); 5506 #endif 5507 5508 /* get a SA header */ 5509 if ((newsah = key_getsah(&saidx)) == NULL) { 5510 /* create a new SA header */ 5511 if ((newsah = key_newsah(&saidx)) == NULL) { 5512 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5513 return key_senderror(so, m, ENOBUFS); 5514 } 5515 } 5516 5517 /* set spidx if there */ 5518 /* XXX rewrite */ 5519 error = key_setident(newsah, m, mhp); 5520 if (error) { 5521 return key_senderror(so, m, error); 5522 } 5523 5524 /* create new SA entry. */ 5525 /* We can create new SA only if SPI is differenct. */ 5526 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5527 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5528 return key_senderror(so, m, EEXIST); 5529 } 5530 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5531 if (newsav == NULL) { 5532 return key_senderror(so, m, error); 5533 } 5534 5535 #ifdef IPSEC_NAT_T 5536 if ((error = key_handle_natt_info(newsav, mhp)) != 0) 5537 return key_senderror(so, m, EINVAL); 5538 #endif /* IPSEC_NAT_T */ 5539 5540 /* check SA values to be mature. */ 5541 if ((error = key_mature(newsav)) != 0) { 5542 KEY_FREESAV(&newsav); 5543 return key_senderror(so, m, error); 5544 } 5545 5546 /* 5547 * don't call key_freesav() here, as we would like to keep the SA 5548 * in the database on success. 5549 */ 5550 5551 { 5552 struct mbuf *n; 5553 5554 /* set msg buf from mhp */ 5555 n = key_getmsgbuf_x1(m, mhp); 5556 if (n == NULL) { 5557 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5558 return key_senderror(so, m, ENOBUFS); 5559 } 5560 5561 m_freem(m); 5562 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5563 } 5564 } 5565 5566 /* m is retained */ 5567 static int 5568 key_setident(struct secashead *sah, struct mbuf *m, 5569 const struct sadb_msghdr *mhp) 5570 { 5571 const struct sadb_ident *idsrc, *iddst; 5572 int idsrclen, iddstlen; 5573 5574 /* sanity check */ 5575 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5576 panic("key_setident: NULL pointer is passed"); 5577 5578 /* don't make buffer if not there */ 5579 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5580 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5581 sah->idents = NULL; 5582 sah->identd = NULL; 5583 return 0; 5584 } 5585 5586 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5587 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5588 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5589 return EINVAL; 5590 } 5591 5592 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5593 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5594 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5595 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5596 5597 /* validity check */ 5598 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5599 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5600 return EINVAL; 5601 } 5602 5603 switch (idsrc->sadb_ident_type) { 5604 case SADB_IDENTTYPE_PREFIX: 5605 case SADB_IDENTTYPE_FQDN: 5606 case SADB_IDENTTYPE_USERFQDN: 5607 default: 5608 /* XXX do nothing */ 5609 sah->idents = NULL; 5610 sah->identd = NULL; 5611 return 0; 5612 } 5613 5614 /* make structure */ 5615 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5616 if (sah->idents == NULL) { 5617 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5618 return ENOBUFS; 5619 } 5620 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5621 if (sah->identd == NULL) { 5622 KFREE(sah->idents); 5623 sah->idents = NULL; 5624 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5625 return ENOBUFS; 5626 } 5627 memcpy(sah->idents, idsrc, idsrclen); 5628 memcpy(sah->identd, iddst, iddstlen); 5629 5630 return 0; 5631 } 5632 5633 /* 5634 * m will not be freed on return. 5635 * it is caller's responsibility to free the result. 5636 */ 5637 static struct mbuf * 5638 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5639 { 5640 struct mbuf *n; 5641 5642 /* sanity check */ 5643 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5644 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5645 5646 /* create new sadb_msg to reply. */ 5647 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5648 SADB_EXT_SA, SADB_X_EXT_SA2, 5649 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5650 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5651 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5652 if (!n) 5653 return NULL; 5654 5655 if (n->m_len < sizeof(struct sadb_msg)) { 5656 n = m_pullup(n, sizeof(struct sadb_msg)); 5657 if (n == NULL) 5658 return NULL; 5659 } 5660 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5661 mtod(n, struct sadb_msg *)->sadb_msg_len = 5662 PFKEY_UNIT64(n->m_pkthdr.len); 5663 5664 return n; 5665 } 5666 5667 static int key_delete_all (struct socket *, struct mbuf *, 5668 const struct sadb_msghdr *, u_int16_t); 5669 5670 /* 5671 * SADB_DELETE processing 5672 * receive 5673 * <base, SA(*), address(SD)> 5674 * from the ikmpd, and set SADB_SASTATE_DEAD, 5675 * and send, 5676 * <base, SA(*), address(SD)> 5677 * to the ikmpd. 5678 * 5679 * m will always be freed. 5680 */ 5681 static int 5682 key_delete(struct socket *so, struct mbuf *m, 5683 const struct sadb_msghdr *mhp) 5684 { 5685 struct sadb_sa *sa0; 5686 struct sadb_address *src0, *dst0; 5687 struct secasindex saidx; 5688 struct secashead *sah; 5689 struct secasvar *sav = NULL; 5690 u_int16_t proto; 5691 int error; 5692 5693 /* sanity check */ 5694 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5695 panic("key_delete: NULL pointer is passed"); 5696 5697 /* map satype to proto */ 5698 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5699 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5700 return key_senderror(so, m, EINVAL); 5701 } 5702 5703 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5704 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5705 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5706 return key_senderror(so, m, EINVAL); 5707 } 5708 5709 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5710 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5711 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5712 return key_senderror(so, m, EINVAL); 5713 } 5714 5715 if (mhp->ext[SADB_EXT_SA] == NULL) { 5716 /* 5717 * Caller wants us to delete all non-LARVAL SAs 5718 * that match the src/dst. This is used during 5719 * IKE INITIAL-CONTACT. 5720 */ 5721 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5722 return key_delete_all(so, m, mhp, proto); 5723 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5724 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5725 return key_senderror(so, m, EINVAL); 5726 } 5727 5728 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5729 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5730 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5731 5732 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5733 dst0 + 1, &saidx)) != 0) 5734 return key_senderror(so, m, EINVAL); 5735 5736 #ifdef IPSEC_NAT_T 5737 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5738 return key_senderror(so, m, EINVAL); 5739 #endif 5740 5741 /* get a SA header */ 5742 LIST_FOREACH(sah, &sahtree, chain) { 5743 if (sah->state == SADB_SASTATE_DEAD) 5744 continue; 5745 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5746 continue; 5747 5748 /* get a SA with SPI. */ 5749 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5750 if (sav) 5751 break; 5752 } 5753 if (sah == NULL) { 5754 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5755 return key_senderror(so, m, ENOENT); 5756 } 5757 5758 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5759 KEY_FREESAV(&sav); 5760 5761 { 5762 struct mbuf *n; 5763 struct sadb_msg *newmsg; 5764 5765 /* create new sadb_msg to reply. */ 5766 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5767 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5768 if (!n) 5769 return key_senderror(so, m, ENOBUFS); 5770 5771 if (n->m_len < sizeof(struct sadb_msg)) { 5772 n = m_pullup(n, sizeof(struct sadb_msg)); 5773 if (n == NULL) 5774 return key_senderror(so, m, ENOBUFS); 5775 } 5776 newmsg = mtod(n, struct sadb_msg *); 5777 newmsg->sadb_msg_errno = 0; 5778 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5779 5780 m_freem(m); 5781 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5782 } 5783 } 5784 5785 /* 5786 * delete all SAs for src/dst. Called from key_delete(). 5787 */ 5788 static int 5789 key_delete_all(struct socket *so, struct mbuf *m, 5790 const struct sadb_msghdr *mhp, u_int16_t proto) 5791 { 5792 struct sadb_address *src0, *dst0; 5793 struct secasindex saidx; 5794 struct secashead *sah; 5795 struct secasvar *sav, *nextsav; 5796 u_int stateidx, state; 5797 int error; 5798 5799 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5800 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5801 5802 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5803 dst0 + 1, &saidx)) != 0) 5804 return key_senderror(so, m, EINVAL); 5805 5806 #ifdef IPSEC_NAT_T 5807 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5808 return key_senderror(so, m, EINVAL); 5809 #endif 5810 5811 LIST_FOREACH(sah, &sahtree, chain) { 5812 if (sah->state == SADB_SASTATE_DEAD) 5813 continue; 5814 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5815 continue; 5816 5817 /* Delete all non-LARVAL SAs. */ 5818 for (stateidx = 0; 5819 stateidx < _ARRAYLEN(saorder_state_alive); 5820 stateidx++) { 5821 state = saorder_state_alive[stateidx]; 5822 if (state == SADB_SASTATE_LARVAL) 5823 continue; 5824 for (sav = LIST_FIRST(&sah->savtree[state]); 5825 sav != NULL; sav = nextsav) { 5826 nextsav = LIST_NEXT(sav, chain); 5827 /* sanity check */ 5828 if (sav->state != state) { 5829 ipseclog((LOG_DEBUG, "key_delete_all: " 5830 "invalid sav->state " 5831 "(queue: %d SA: %d)\n", 5832 state, sav->state)); 5833 continue; 5834 } 5835 5836 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5837 KEY_FREESAV(&sav); 5838 } 5839 } 5840 } 5841 { 5842 struct mbuf *n; 5843 struct sadb_msg *newmsg; 5844 5845 /* create new sadb_msg to reply. */ 5846 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5847 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5848 if (!n) 5849 return key_senderror(so, m, ENOBUFS); 5850 5851 if (n->m_len < sizeof(struct sadb_msg)) { 5852 n = m_pullup(n, sizeof(struct sadb_msg)); 5853 if (n == NULL) 5854 return key_senderror(so, m, ENOBUFS); 5855 } 5856 newmsg = mtod(n, struct sadb_msg *); 5857 newmsg->sadb_msg_errno = 0; 5858 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5859 5860 m_freem(m); 5861 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5862 } 5863 } 5864 5865 /* 5866 * SADB_GET processing 5867 * receive 5868 * <base, SA(*), address(SD)> 5869 * from the ikmpd, and get a SP and a SA to respond, 5870 * and send, 5871 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5872 * (identity(SD),) (sensitivity)> 5873 * to the ikmpd. 5874 * 5875 * m will always be freed. 5876 */ 5877 static int 5878 key_get(struct socket *so, struct mbuf *m, 5879 const struct sadb_msghdr *mhp) 5880 { 5881 struct sadb_sa *sa0; 5882 struct sadb_address *src0, *dst0; 5883 struct secasindex saidx; 5884 struct secashead *sah; 5885 struct secasvar *sav = NULL; 5886 u_int16_t proto; 5887 int error; 5888 5889 /* sanity check */ 5890 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5891 panic("key_get: NULL pointer is passed"); 5892 5893 /* map satype to proto */ 5894 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5895 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5896 return key_senderror(so, m, EINVAL); 5897 } 5898 5899 if (mhp->ext[SADB_EXT_SA] == NULL || 5900 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5901 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5902 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5903 return key_senderror(so, m, EINVAL); 5904 } 5905 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5906 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5907 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5908 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5909 return key_senderror(so, m, EINVAL); 5910 } 5911 5912 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5913 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5914 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5915 5916 5917 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5918 dst0 + 1, &saidx)) != 0) 5919 return key_senderror(so, m, EINVAL); 5920 5921 #ifdef IPSEC_NAT_T 5922 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5923 return key_senderror(so, m, EINVAL); 5924 #endif 5925 5926 /* get a SA header */ 5927 LIST_FOREACH(sah, &sahtree, chain) { 5928 if (sah->state == SADB_SASTATE_DEAD) 5929 continue; 5930 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5931 continue; 5932 5933 /* get a SA with SPI. */ 5934 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5935 if (sav) 5936 break; 5937 } 5938 if (sah == NULL) { 5939 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5940 return key_senderror(so, m, ENOENT); 5941 } 5942 5943 { 5944 struct mbuf *n; 5945 u_int8_t satype; 5946 5947 /* map proto to satype */ 5948 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5949 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5950 return key_senderror(so, m, EINVAL); 5951 } 5952 5953 /* create new sadb_msg to reply. */ 5954 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5955 mhp->msg->sadb_msg_pid); 5956 if (!n) 5957 return key_senderror(so, m, ENOBUFS); 5958 5959 m_freem(m); 5960 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5961 } 5962 } 5963 5964 /* XXX make it sysctl-configurable? */ 5965 static void 5966 key_getcomb_setlifetime(struct sadb_comb *comb) 5967 { 5968 5969 comb->sadb_comb_soft_allocations = 1; 5970 comb->sadb_comb_hard_allocations = 1; 5971 comb->sadb_comb_soft_bytes = 0; 5972 comb->sadb_comb_hard_bytes = 0; 5973 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5974 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5975 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5976 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5977 } 5978 5979 /* 5980 * XXX reorder combinations by preference 5981 * XXX no idea if the user wants ESP authentication or not 5982 */ 5983 static struct mbuf * 5984 key_getcomb_esp(void) 5985 { 5986 struct sadb_comb *comb; 5987 const struct enc_xform *algo; 5988 struct mbuf *result = NULL, *m, *n; 5989 int encmin; 5990 int i, off, o; 5991 int totlen; 5992 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5993 5994 m = NULL; 5995 for (i = 1; i <= SADB_EALG_MAX; i++) { 5996 algo = esp_algorithm_lookup(i); 5997 if (algo == NULL) 5998 continue; 5999 6000 /* discard algorithms with key size smaller than system min */ 6001 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 6002 continue; 6003 if (_BITS(algo->minkey) < ipsec_esp_keymin) 6004 encmin = ipsec_esp_keymin; 6005 else 6006 encmin = _BITS(algo->minkey); 6007 6008 if (ipsec_esp_auth) 6009 m = key_getcomb_ah(); 6010 else { 6011 IPSEC_ASSERT(l <= MLEN, 6012 ("key_getcomb_esp: l=%u > MLEN=%lu", 6013 l, (u_long) MLEN)); 6014 MGET(m, M_DONTWAIT, MT_DATA); 6015 if (m) { 6016 M_ALIGN(m, l); 6017 m->m_len = l; 6018 m->m_next = NULL; 6019 memset(mtod(m, void *), 0, m->m_len); 6020 } 6021 } 6022 if (!m) 6023 goto fail; 6024 6025 totlen = 0; 6026 for (n = m; n; n = n->m_next) 6027 totlen += n->m_len; 6028 IPSEC_ASSERT((totlen % l) == 0, 6029 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 6030 6031 for (off = 0; off < totlen; off += l) { 6032 n = m_pulldown(m, off, l, &o); 6033 if (!n) { 6034 /* m is already freed */ 6035 goto fail; 6036 } 6037 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6038 memset(comb, 0, sizeof(*comb)); 6039 key_getcomb_setlifetime(comb); 6040 comb->sadb_comb_encrypt = i; 6041 comb->sadb_comb_encrypt_minbits = encmin; 6042 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6043 } 6044 6045 if (!result) 6046 result = m; 6047 else 6048 m_cat(result, m); 6049 } 6050 6051 return result; 6052 6053 fail: 6054 if (result) 6055 m_freem(result); 6056 return NULL; 6057 } 6058 6059 static void 6060 key_getsizes_ah(const struct auth_hash *ah, int alg, 6061 u_int16_t* ksmin, u_int16_t* ksmax) 6062 { 6063 *ksmin = *ksmax = ah->keysize; 6064 if (ah->keysize == 0) { 6065 /* 6066 * Transform takes arbitrary key size but algorithm 6067 * key size is restricted. Enforce this here. 6068 */ 6069 switch (alg) { 6070 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6071 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6072 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 6073 default: 6074 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 6075 alg)); 6076 break; 6077 } 6078 } 6079 } 6080 6081 /* 6082 * XXX reorder combinations by preference 6083 */ 6084 static struct mbuf * 6085 key_getcomb_ah(void) 6086 { 6087 struct sadb_comb *comb; 6088 const struct auth_hash *algo; 6089 struct mbuf *m; 6090 u_int16_t minkeysize, maxkeysize; 6091 int i; 6092 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6093 6094 m = NULL; 6095 for (i = 1; i <= SADB_AALG_MAX; i++) { 6096 #if 1 6097 /* we prefer HMAC algorithms, not old algorithms */ 6098 if (i != SADB_AALG_SHA1HMAC && 6099 i != SADB_AALG_MD5HMAC && 6100 i != SADB_X_AALG_SHA2_256 && 6101 i != SADB_X_AALG_SHA2_384 && 6102 i != SADB_X_AALG_SHA2_512) 6103 continue; 6104 #endif 6105 algo = ah_algorithm_lookup(i); 6106 if (!algo) 6107 continue; 6108 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6109 /* discard algorithms with key size smaller than system min */ 6110 if (_BITS(minkeysize) < ipsec_ah_keymin) 6111 continue; 6112 6113 if (!m) { 6114 IPSEC_ASSERT(l <= MLEN, 6115 ("key_getcomb_ah: l=%u > MLEN=%lu", 6116 l, (u_long) MLEN)); 6117 MGET(m, M_DONTWAIT, MT_DATA); 6118 if (m) { 6119 M_ALIGN(m, l); 6120 m->m_len = l; 6121 m->m_next = NULL; 6122 } 6123 } else 6124 M_PREPEND(m, l, M_DONTWAIT); 6125 if (!m) 6126 return NULL; 6127 6128 comb = mtod(m, struct sadb_comb *); 6129 memset(comb, 0, sizeof(*comb)); 6130 key_getcomb_setlifetime(comb); 6131 comb->sadb_comb_auth = i; 6132 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6133 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6134 } 6135 6136 return m; 6137 } 6138 6139 /* 6140 * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 6141 * XXX reorder combinations by preference 6142 */ 6143 static struct mbuf * 6144 key_getcomb_ipcomp(void) 6145 { 6146 struct sadb_comb *comb; 6147 const struct comp_algo *algo; 6148 struct mbuf *m; 6149 int i; 6150 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6151 6152 m = NULL; 6153 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6154 algo = ipcomp_algorithm_lookup(i); 6155 if (!algo) 6156 continue; 6157 6158 if (!m) { 6159 IPSEC_ASSERT(l <= MLEN, 6160 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 6161 l, (u_long) MLEN)); 6162 MGET(m, M_DONTWAIT, MT_DATA); 6163 if (m) { 6164 M_ALIGN(m, l); 6165 m->m_len = l; 6166 m->m_next = NULL; 6167 } 6168 } else 6169 M_PREPEND(m, l, M_DONTWAIT); 6170 if (!m) 6171 return NULL; 6172 6173 comb = mtod(m, struct sadb_comb *); 6174 memset(comb, 0, sizeof(*comb)); 6175 key_getcomb_setlifetime(comb); 6176 comb->sadb_comb_encrypt = i; 6177 /* what should we set into sadb_comb_*_{min,max}bits? */ 6178 } 6179 6180 return m; 6181 } 6182 6183 /* 6184 * XXX no way to pass mode (transport/tunnel) to userland 6185 * XXX replay checking? 6186 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6187 */ 6188 static struct mbuf * 6189 key_getprop(const struct secasindex *saidx) 6190 { 6191 struct sadb_prop *prop; 6192 struct mbuf *m, *n; 6193 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6194 int totlen; 6195 6196 switch (saidx->proto) { 6197 case IPPROTO_ESP: 6198 m = key_getcomb_esp(); 6199 break; 6200 case IPPROTO_AH: 6201 m = key_getcomb_ah(); 6202 break; 6203 case IPPROTO_IPCOMP: 6204 m = key_getcomb_ipcomp(); 6205 break; 6206 default: 6207 return NULL; 6208 } 6209 6210 if (!m) 6211 return NULL; 6212 M_PREPEND(m, l, M_DONTWAIT); 6213 if (!m) 6214 return NULL; 6215 6216 totlen = 0; 6217 for (n = m; n; n = n->m_next) 6218 totlen += n->m_len; 6219 6220 prop = mtod(m, struct sadb_prop *); 6221 memset(prop, 0, sizeof(*prop)); 6222 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6223 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6224 prop->sadb_prop_replay = 32; /* XXX */ 6225 6226 return m; 6227 } 6228 6229 /* 6230 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6231 * send 6232 * <base, SA, address(SD), (address(P)), x_policy, 6233 * (identity(SD),) (sensitivity,) proposal> 6234 * to KMD, and expect to receive 6235 * <base> with SADB_ACQUIRE if error occurred, 6236 * or 6237 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6238 * from KMD by PF_KEY. 6239 * 6240 * XXX x_policy is outside of RFC2367 (KAME extension). 6241 * XXX sensitivity is not supported. 6242 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6243 * see comment for key_getcomb_ipcomp(). 6244 * 6245 * OUT: 6246 * 0 : succeed 6247 * others: error number 6248 */ 6249 static int 6250 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6251 { 6252 struct mbuf *result = NULL, *m; 6253 #ifndef IPSEC_NONBLOCK_ACQUIRE 6254 struct secacq *newacq; 6255 #endif 6256 u_int8_t satype; 6257 int error = -1; 6258 u_int32_t seq; 6259 6260 /* sanity check */ 6261 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 6262 satype = key_proto2satype(saidx->proto); 6263 IPSEC_ASSERT(satype != 0, 6264 ("key_acquire: null satype, protocol %u", saidx->proto)); 6265 6266 #ifndef IPSEC_NONBLOCK_ACQUIRE 6267 /* 6268 * We never do anything about acquirng SA. There is anather 6269 * solution that kernel blocks to send SADB_ACQUIRE message until 6270 * getting something message from IKEd. In later case, to be 6271 * managed with ACQUIRING list. 6272 */ 6273 /* Get an entry to check whether sending message or not. */ 6274 if ((newacq = key_getacq(saidx)) != NULL) { 6275 if (key_blockacq_count < newacq->count) { 6276 /* reset counter and do send message. */ 6277 newacq->count = 0; 6278 } else { 6279 /* increment counter and do nothing. */ 6280 newacq->count++; 6281 return 0; 6282 } 6283 } else { 6284 /* make new entry for blocking to send SADB_ACQUIRE. */ 6285 if ((newacq = key_newacq(saidx)) == NULL) 6286 return ENOBUFS; 6287 6288 /* add to acqtree */ 6289 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6290 } 6291 #endif 6292 6293 6294 #ifndef IPSEC_NONBLOCK_ACQUIRE 6295 seq = newacq->seq; 6296 #else 6297 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6298 #endif 6299 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6300 if (!m) { 6301 error = ENOBUFS; 6302 goto fail; 6303 } 6304 result = m; 6305 6306 /* set sadb_address for saidx's. */ 6307 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6308 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6309 if (!m) { 6310 error = ENOBUFS; 6311 goto fail; 6312 } 6313 m_cat(result, m); 6314 6315 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6316 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6317 if (!m) { 6318 error = ENOBUFS; 6319 goto fail; 6320 } 6321 m_cat(result, m); 6322 6323 /* XXX proxy address (optional) */ 6324 6325 /* set sadb_x_policy */ 6326 if (sp) { 6327 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6328 if (!m) { 6329 error = ENOBUFS; 6330 goto fail; 6331 } 6332 m_cat(result, m); 6333 } 6334 6335 /* XXX identity (optional) */ 6336 #if 0 6337 if (idexttype && fqdn) { 6338 /* create identity extension (FQDN) */ 6339 struct sadb_ident *id; 6340 int fqdnlen; 6341 6342 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6343 id = (struct sadb_ident *)p; 6344 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6345 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6346 id->sadb_ident_exttype = idexttype; 6347 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6348 memcpy(id + 1, fqdn, fqdnlen); 6349 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6350 } 6351 6352 if (idexttype) { 6353 /* create identity extension (USERFQDN) */ 6354 struct sadb_ident *id; 6355 int userfqdnlen; 6356 6357 if (userfqdn) { 6358 /* +1 for terminating-NUL */ 6359 userfqdnlen = strlen(userfqdn) + 1; 6360 } else 6361 userfqdnlen = 0; 6362 id = (struct sadb_ident *)p; 6363 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6364 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6365 id->sadb_ident_exttype = idexttype; 6366 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6367 /* XXX is it correct? */ 6368 if (curlwp) 6369 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6370 if (userfqdn && userfqdnlen) 6371 memcpy(id + 1, userfqdn, userfqdnlen); 6372 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6373 } 6374 #endif 6375 6376 /* XXX sensitivity (optional) */ 6377 6378 /* create proposal/combination extension */ 6379 m = key_getprop(saidx); 6380 #if 0 6381 /* 6382 * spec conformant: always attach proposal/combination extension, 6383 * the problem is that we have no way to attach it for ipcomp, 6384 * due to the way sadb_comb is declared in RFC2367. 6385 */ 6386 if (!m) { 6387 error = ENOBUFS; 6388 goto fail; 6389 } 6390 m_cat(result, m); 6391 #else 6392 /* 6393 * outside of spec; make proposal/combination extension optional. 6394 */ 6395 if (m) 6396 m_cat(result, m); 6397 #endif 6398 6399 if ((result->m_flags & M_PKTHDR) == 0) { 6400 error = EINVAL; 6401 goto fail; 6402 } 6403 6404 if (result->m_len < sizeof(struct sadb_msg)) { 6405 result = m_pullup(result, sizeof(struct sadb_msg)); 6406 if (result == NULL) { 6407 error = ENOBUFS; 6408 goto fail; 6409 } 6410 } 6411 6412 result->m_pkthdr.len = 0; 6413 for (m = result; m; m = m->m_next) 6414 result->m_pkthdr.len += m->m_len; 6415 6416 mtod(result, struct sadb_msg *)->sadb_msg_len = 6417 PFKEY_UNIT64(result->m_pkthdr.len); 6418 6419 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6420 6421 fail: 6422 if (result) 6423 m_freem(result); 6424 return error; 6425 } 6426 6427 #ifndef IPSEC_NONBLOCK_ACQUIRE 6428 static struct secacq * 6429 key_newacq(const struct secasindex *saidx) 6430 { 6431 struct secacq *newacq; 6432 6433 /* get new entry */ 6434 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6435 if (newacq == NULL) { 6436 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6437 return NULL; 6438 } 6439 memset(newacq, 0, sizeof(*newacq)); 6440 6441 /* copy secindex */ 6442 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6443 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6444 newacq->created = time_uptime; 6445 newacq->count = 0; 6446 6447 return newacq; 6448 } 6449 6450 static struct secacq * 6451 key_getacq(const struct secasindex *saidx) 6452 { 6453 struct secacq *acq; 6454 6455 LIST_FOREACH(acq, &acqtree, chain) { 6456 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6457 return acq; 6458 } 6459 6460 return NULL; 6461 } 6462 6463 static struct secacq * 6464 key_getacqbyseq(u_int32_t seq) 6465 { 6466 struct secacq *acq; 6467 6468 LIST_FOREACH(acq, &acqtree, chain) { 6469 if (acq->seq == seq) 6470 return acq; 6471 } 6472 6473 return NULL; 6474 } 6475 #endif 6476 6477 static struct secspacq * 6478 key_newspacq(const struct secpolicyindex *spidx) 6479 { 6480 struct secspacq *acq; 6481 6482 /* get new entry */ 6483 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6484 if (acq == NULL) { 6485 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6486 return NULL; 6487 } 6488 memset(acq, 0, sizeof(*acq)); 6489 6490 /* copy secindex */ 6491 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6492 acq->created = time_uptime; 6493 acq->count = 0; 6494 6495 return acq; 6496 } 6497 6498 static struct secspacq * 6499 key_getspacq(const struct secpolicyindex *spidx) 6500 { 6501 struct secspacq *acq; 6502 6503 LIST_FOREACH(acq, &spacqtree, chain) { 6504 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6505 return acq; 6506 } 6507 6508 return NULL; 6509 } 6510 6511 /* 6512 * SADB_ACQUIRE processing, 6513 * in first situation, is receiving 6514 * <base> 6515 * from the ikmpd, and clear sequence of its secasvar entry. 6516 * 6517 * In second situation, is receiving 6518 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6519 * from a user land process, and return 6520 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6521 * to the socket. 6522 * 6523 * m will always be freed. 6524 */ 6525 static int 6526 key_acquire2(struct socket *so, struct mbuf *m, 6527 const struct sadb_msghdr *mhp) 6528 { 6529 const struct sadb_address *src0, *dst0; 6530 struct secasindex saidx; 6531 struct secashead *sah; 6532 u_int16_t proto; 6533 int error; 6534 6535 /* sanity check */ 6536 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6537 panic("key_acquire2: NULL pointer is passed"); 6538 6539 /* 6540 * Error message from KMd. 6541 * We assume that if error was occurred in IKEd, the length of PFKEY 6542 * message is equal to the size of sadb_msg structure. 6543 * We do not raise error even if error occurred in this function. 6544 */ 6545 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6546 #ifndef IPSEC_NONBLOCK_ACQUIRE 6547 struct secacq *acq; 6548 6549 /* check sequence number */ 6550 if (mhp->msg->sadb_msg_seq == 0) { 6551 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6552 m_freem(m); 6553 return 0; 6554 } 6555 6556 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6557 /* 6558 * the specified larval SA is already gone, or we got 6559 * a bogus sequence number. we can silently ignore it. 6560 */ 6561 m_freem(m); 6562 return 0; 6563 } 6564 6565 /* reset acq counter in order to deletion by timehander. */ 6566 acq->created = time_uptime; 6567 acq->count = 0; 6568 #endif 6569 m_freem(m); 6570 return 0; 6571 } 6572 6573 /* 6574 * This message is from user land. 6575 */ 6576 6577 /* map satype to proto */ 6578 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6579 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6580 return key_senderror(so, m, EINVAL); 6581 } 6582 6583 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6584 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6585 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6586 /* error */ 6587 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6588 return key_senderror(so, m, EINVAL); 6589 } 6590 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6591 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6592 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6593 /* error */ 6594 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6595 return key_senderror(so, m, EINVAL); 6596 } 6597 6598 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6599 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6600 6601 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 6602 dst0 + 1, &saidx)) != 0) 6603 return key_senderror(so, m, EINVAL); 6604 6605 #ifdef IPSEC_NAT_T 6606 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 6607 return key_senderror(so, m, EINVAL); 6608 #endif 6609 6610 /* get a SA index */ 6611 LIST_FOREACH(sah, &sahtree, chain) { 6612 if (sah->state == SADB_SASTATE_DEAD) 6613 continue; 6614 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6615 break; 6616 } 6617 if (sah != NULL) { 6618 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6619 return key_senderror(so, m, EEXIST); 6620 } 6621 6622 error = key_acquire(&saidx, NULL); 6623 if (error != 0) { 6624 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6625 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6626 return key_senderror(so, m, error); 6627 } 6628 6629 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6630 } 6631 6632 /* 6633 * SADB_REGISTER processing. 6634 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6635 * receive 6636 * <base> 6637 * from the ikmpd, and register a socket to send PF_KEY messages, 6638 * and send 6639 * <base, supported> 6640 * to KMD by PF_KEY. 6641 * If socket is detached, must free from regnode. 6642 * 6643 * m will always be freed. 6644 */ 6645 static int 6646 key_register(struct socket *so, struct mbuf *m, 6647 const struct sadb_msghdr *mhp) 6648 { 6649 struct secreg *reg, *newreg = 0; 6650 6651 /* sanity check */ 6652 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6653 panic("key_register: NULL pointer is passed"); 6654 6655 /* check for invalid register message */ 6656 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6657 return key_senderror(so, m, EINVAL); 6658 6659 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6660 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6661 goto setmsg; 6662 6663 /* check whether existing or not */ 6664 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6665 if (reg->so == so) { 6666 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6667 return key_senderror(so, m, EEXIST); 6668 } 6669 } 6670 6671 /* create regnode */ 6672 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6673 if (newreg == NULL) { 6674 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6675 return key_senderror(so, m, ENOBUFS); 6676 } 6677 memset(newreg, 0, sizeof(*newreg)); 6678 6679 newreg->so = so; 6680 ((struct keycb *)sotorawcb(so))->kp_registered++; 6681 6682 /* add regnode to regtree. */ 6683 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6684 6685 setmsg: 6686 { 6687 struct mbuf *n; 6688 struct sadb_msg *newmsg; 6689 struct sadb_supported *sup; 6690 u_int len, alen, elen; 6691 int off; 6692 int i; 6693 struct sadb_alg *alg; 6694 6695 /* create new sadb_msg to reply. */ 6696 alen = 0; 6697 for (i = 1; i <= SADB_AALG_MAX; i++) { 6698 if (ah_algorithm_lookup(i)) 6699 alen += sizeof(struct sadb_alg); 6700 } 6701 if (alen) 6702 alen += sizeof(struct sadb_supported); 6703 elen = 0; 6704 for (i = 1; i <= SADB_EALG_MAX; i++) { 6705 if (esp_algorithm_lookup(i)) 6706 elen += sizeof(struct sadb_alg); 6707 } 6708 if (elen) 6709 elen += sizeof(struct sadb_supported); 6710 6711 len = sizeof(struct sadb_msg) + alen + elen; 6712 6713 if (len > MCLBYTES) 6714 return key_senderror(so, m, ENOBUFS); 6715 6716 MGETHDR(n, M_DONTWAIT, MT_DATA); 6717 if (len > MHLEN) { 6718 MCLGET(n, M_DONTWAIT); 6719 if ((n->m_flags & M_EXT) == 0) { 6720 m_freem(n); 6721 n = NULL; 6722 } 6723 } 6724 if (!n) 6725 return key_senderror(so, m, ENOBUFS); 6726 6727 n->m_pkthdr.len = n->m_len = len; 6728 n->m_next = NULL; 6729 off = 0; 6730 6731 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6732 newmsg = mtod(n, struct sadb_msg *); 6733 newmsg->sadb_msg_errno = 0; 6734 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6735 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6736 6737 /* for authentication algorithm */ 6738 if (alen) { 6739 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6740 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6741 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6742 off += PFKEY_ALIGN8(sizeof(*sup)); 6743 6744 for (i = 1; i <= SADB_AALG_MAX; i++) { 6745 const struct auth_hash *aalgo; 6746 u_int16_t minkeysize, maxkeysize; 6747 6748 aalgo = ah_algorithm_lookup(i); 6749 if (!aalgo) 6750 continue; 6751 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6752 alg->sadb_alg_id = i; 6753 alg->sadb_alg_ivlen = 0; 6754 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6755 alg->sadb_alg_minbits = _BITS(minkeysize); 6756 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6757 off += PFKEY_ALIGN8(sizeof(*alg)); 6758 } 6759 } 6760 6761 /* for encryption algorithm */ 6762 if (elen) { 6763 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6764 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6765 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6766 off += PFKEY_ALIGN8(sizeof(*sup)); 6767 6768 for (i = 1; i <= SADB_EALG_MAX; i++) { 6769 const struct enc_xform *ealgo; 6770 6771 ealgo = esp_algorithm_lookup(i); 6772 if (!ealgo) 6773 continue; 6774 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6775 alg->sadb_alg_id = i; 6776 alg->sadb_alg_ivlen = ealgo->blocksize; 6777 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6778 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6779 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6780 } 6781 } 6782 6783 #ifdef DIAGNOSTIC 6784 if (off != len) 6785 panic("length assumption failed in key_register"); 6786 #endif 6787 6788 m_freem(m); 6789 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6790 } 6791 } 6792 6793 /* 6794 * free secreg entry registered. 6795 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6796 */ 6797 void 6798 key_freereg(struct socket *so) 6799 { 6800 struct secreg *reg; 6801 int i; 6802 6803 /* sanity check */ 6804 if (so == NULL) 6805 panic("key_freereg: NULL pointer is passed"); 6806 6807 /* 6808 * check whether existing or not. 6809 * check all type of SA, because there is a potential that 6810 * one socket is registered to multiple type of SA. 6811 */ 6812 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6813 LIST_FOREACH(reg, ®tree[i], chain) { 6814 if (reg->so == so 6815 && __LIST_CHAINED(reg)) { 6816 LIST_REMOVE(reg, chain); 6817 KFREE(reg); 6818 break; 6819 } 6820 } 6821 } 6822 6823 return; 6824 } 6825 6826 /* 6827 * SADB_EXPIRE processing 6828 * send 6829 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6830 * to KMD by PF_KEY. 6831 * NOTE: We send only soft lifetime extension. 6832 * 6833 * OUT: 0 : succeed 6834 * others : error number 6835 */ 6836 static int 6837 key_expire(struct secasvar *sav) 6838 { 6839 int s; 6840 int satype; 6841 struct mbuf *result = NULL, *m; 6842 int len; 6843 int error = -1; 6844 struct sadb_lifetime *lt; 6845 6846 /* XXX: Why do we lock ? */ 6847 s = splsoftnet(); /*called from softclock()*/ 6848 6849 /* sanity check */ 6850 if (sav == NULL) 6851 panic("key_expire: NULL pointer is passed"); 6852 if (sav->sah == NULL) 6853 panic("key_expire: Why was SA index in SA NULL"); 6854 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6855 panic("key_expire: invalid proto is passed"); 6856 6857 /* set msg header */ 6858 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6859 if (!m) { 6860 error = ENOBUFS; 6861 goto fail; 6862 } 6863 result = m; 6864 6865 /* create SA extension */ 6866 m = key_setsadbsa(sav); 6867 if (!m) { 6868 error = ENOBUFS; 6869 goto fail; 6870 } 6871 m_cat(result, m); 6872 6873 /* create SA extension */ 6874 m = key_setsadbxsa2(sav->sah->saidx.mode, 6875 sav->replay ? sav->replay->count : 0, 6876 sav->sah->saidx.reqid); 6877 if (!m) { 6878 error = ENOBUFS; 6879 goto fail; 6880 } 6881 m_cat(result, m); 6882 6883 /* create lifetime extension (current and soft) */ 6884 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6885 m = key_alloc_mbuf(len); 6886 if (!m || m->m_next) { /*XXX*/ 6887 if (m) 6888 m_freem(m); 6889 error = ENOBUFS; 6890 goto fail; 6891 } 6892 memset(mtod(m, void *), 0, len); 6893 lt = mtod(m, struct sadb_lifetime *); 6894 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6895 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6896 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6897 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6898 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime 6899 + time_second - time_uptime; 6900 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime 6901 + time_second - time_uptime; 6902 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6903 memcpy(lt, sav->lft_s, sizeof(*lt)); 6904 m_cat(result, m); 6905 6906 /* set sadb_address for source */ 6907 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6908 &sav->sah->saidx.src.sa, 6909 FULLMASK, IPSEC_ULPROTO_ANY); 6910 if (!m) { 6911 error = ENOBUFS; 6912 goto fail; 6913 } 6914 m_cat(result, m); 6915 6916 /* set sadb_address for destination */ 6917 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6918 &sav->sah->saidx.dst.sa, 6919 FULLMASK, IPSEC_ULPROTO_ANY); 6920 if (!m) { 6921 error = ENOBUFS; 6922 goto fail; 6923 } 6924 m_cat(result, m); 6925 6926 if ((result->m_flags & M_PKTHDR) == 0) { 6927 error = EINVAL; 6928 goto fail; 6929 } 6930 6931 if (result->m_len < sizeof(struct sadb_msg)) { 6932 result = m_pullup(result, sizeof(struct sadb_msg)); 6933 if (result == NULL) { 6934 error = ENOBUFS; 6935 goto fail; 6936 } 6937 } 6938 6939 result->m_pkthdr.len = 0; 6940 for (m = result; m; m = m->m_next) 6941 result->m_pkthdr.len += m->m_len; 6942 6943 mtod(result, struct sadb_msg *)->sadb_msg_len = 6944 PFKEY_UNIT64(result->m_pkthdr.len); 6945 6946 splx(s); 6947 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6948 6949 fail: 6950 if (result) 6951 m_freem(result); 6952 splx(s); 6953 return error; 6954 } 6955 6956 /* 6957 * SADB_FLUSH processing 6958 * receive 6959 * <base> 6960 * from the ikmpd, and free all entries in secastree. 6961 * and send, 6962 * <base> 6963 * to the ikmpd. 6964 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6965 * 6966 * m will always be freed. 6967 */ 6968 static int 6969 key_flush(struct socket *so, struct mbuf *m, 6970 const struct sadb_msghdr *mhp) 6971 { 6972 struct sadb_msg *newmsg; 6973 struct secashead *sah, *nextsah; 6974 struct secasvar *sav, *nextsav; 6975 u_int16_t proto; 6976 u_int8_t state; 6977 u_int stateidx; 6978 6979 /* sanity check */ 6980 if (so == NULL || mhp == NULL || mhp->msg == NULL) 6981 panic("key_flush: NULL pointer is passed"); 6982 6983 /* map satype to proto */ 6984 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6985 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6986 return key_senderror(so, m, EINVAL); 6987 } 6988 6989 /* no SATYPE specified, i.e. flushing all SA. */ 6990 for (sah = LIST_FIRST(&sahtree); 6991 sah != NULL; 6992 sah = nextsah) { 6993 nextsah = LIST_NEXT(sah, chain); 6994 6995 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6996 && proto != sah->saidx.proto) 6997 continue; 6998 6999 for (stateidx = 0; 7000 stateidx < _ARRAYLEN(saorder_state_alive); 7001 stateidx++) { 7002 state = saorder_state_any[stateidx]; 7003 for (sav = LIST_FIRST(&sah->savtree[state]); 7004 sav != NULL; 7005 sav = nextsav) { 7006 7007 nextsav = LIST_NEXT(sav, chain); 7008 7009 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7010 KEY_FREESAV(&sav); 7011 } 7012 } 7013 7014 sah->state = SADB_SASTATE_DEAD; 7015 } 7016 7017 if (m->m_len < sizeof(struct sadb_msg) || 7018 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7019 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 7020 return key_senderror(so, m, ENOBUFS); 7021 } 7022 7023 if (m->m_next) 7024 m_freem(m->m_next); 7025 m->m_next = NULL; 7026 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7027 newmsg = mtod(m, struct sadb_msg *); 7028 newmsg->sadb_msg_errno = 0; 7029 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7030 7031 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7032 } 7033 7034 7035 static struct mbuf * 7036 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 7037 { 7038 struct secashead *sah; 7039 struct secasvar *sav; 7040 u_int16_t proto; 7041 u_int stateidx; 7042 u_int8_t satype; 7043 u_int8_t state; 7044 int cnt; 7045 struct mbuf *m, *n, *prev; 7046 int totlen; 7047 7048 *lenp = 0; 7049 7050 /* map satype to proto */ 7051 if ((proto = key_satype2proto(req_satype)) == 0) { 7052 *errorp = EINVAL; 7053 return (NULL); 7054 } 7055 7056 /* count sav entries to be sent to userland. */ 7057 cnt = 0; 7058 LIST_FOREACH(sah, &sahtree, chain) { 7059 if (req_satype != SADB_SATYPE_UNSPEC && 7060 proto != sah->saidx.proto) 7061 continue; 7062 7063 for (stateidx = 0; 7064 stateidx < _ARRAYLEN(saorder_state_any); 7065 stateidx++) { 7066 state = saorder_state_any[stateidx]; 7067 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7068 cnt++; 7069 } 7070 } 7071 } 7072 7073 if (cnt == 0) { 7074 *errorp = ENOENT; 7075 return (NULL); 7076 } 7077 7078 /* send this to the userland, one at a time. */ 7079 m = NULL; 7080 prev = m; 7081 LIST_FOREACH(sah, &sahtree, chain) { 7082 if (req_satype != SADB_SATYPE_UNSPEC && 7083 proto != sah->saidx.proto) 7084 continue; 7085 7086 /* map proto to satype */ 7087 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7088 m_freem(m); 7089 *errorp = EINVAL; 7090 return (NULL); 7091 } 7092 7093 for (stateidx = 0; 7094 stateidx < _ARRAYLEN(saorder_state_any); 7095 stateidx++) { 7096 state = saorder_state_any[stateidx]; 7097 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7098 n = key_setdumpsa(sav, SADB_DUMP, satype, 7099 --cnt, pid); 7100 if (!n) { 7101 m_freem(m); 7102 *errorp = ENOBUFS; 7103 return (NULL); 7104 } 7105 7106 totlen += n->m_pkthdr.len; 7107 if (!m) 7108 m = n; 7109 else 7110 prev->m_nextpkt = n; 7111 prev = n; 7112 } 7113 } 7114 } 7115 7116 if (!m) { 7117 *errorp = EINVAL; 7118 return (NULL); 7119 } 7120 7121 if ((m->m_flags & M_PKTHDR) != 0) { 7122 m->m_pkthdr.len = 0; 7123 for (n = m; n; n = n->m_next) 7124 m->m_pkthdr.len += n->m_len; 7125 } 7126 7127 *errorp = 0; 7128 return (m); 7129 } 7130 7131 /* 7132 * SADB_DUMP processing 7133 * dump all entries including status of DEAD in SAD. 7134 * receive 7135 * <base> 7136 * from the ikmpd, and dump all secasvar leaves 7137 * and send, 7138 * <base> ..... 7139 * to the ikmpd. 7140 * 7141 * m will always be freed. 7142 */ 7143 static int 7144 key_dump(struct socket *so, struct mbuf *m0, 7145 const struct sadb_msghdr *mhp) 7146 { 7147 u_int16_t proto; 7148 u_int8_t satype; 7149 struct mbuf *n; 7150 int s; 7151 int error, len, ok; 7152 7153 /* sanity check */ 7154 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 7155 panic("key_dump: NULL pointer is passed"); 7156 7157 /* map satype to proto */ 7158 satype = mhp->msg->sadb_msg_satype; 7159 if ((proto = key_satype2proto(satype)) == 0) { 7160 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 7161 return key_senderror(so, m0, EINVAL); 7162 } 7163 7164 /* 7165 * If the requestor has insufficient socket-buffer space 7166 * for the entire chain, nobody gets any response to the DUMP. 7167 * XXX For now, only the requestor ever gets anything. 7168 * Moreover, if the requestor has any space at all, they receive 7169 * the entire chain, otherwise the request is refused with ENOBUFS. 7170 */ 7171 if (sbspace(&so->so_rcv) <= 0) { 7172 return key_senderror(so, m0, ENOBUFS); 7173 } 7174 7175 s = splsoftnet(); 7176 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7177 splx(s); 7178 7179 if (n == NULL) { 7180 return key_senderror(so, m0, ENOENT); 7181 } 7182 { 7183 uint64_t *ps = PFKEY_STAT_GETREF(); 7184 ps[PFKEY_STAT_IN_TOTAL]++; 7185 ps[PFKEY_STAT_IN_BYTES] += len; 7186 PFKEY_STAT_PUTREF(); 7187 } 7188 7189 /* 7190 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7191 * The requestor receives either the entire chain, or an 7192 * error message with ENOBUFS. 7193 * 7194 * sbappendaddrchain() takes the chain of entries, one 7195 * packet-record per SPD entry, prepends the key_src sockaddr 7196 * to each packet-record, links the sockaddr mbufs into a new 7197 * list of records, then appends the entire resulting 7198 * list to the requesting socket. 7199 */ 7200 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 7201 n, SB_PRIO_ONESHOT_OVERFLOW); 7202 7203 if (!ok) { 7204 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7205 m_freem(n); 7206 return key_senderror(so, m0, ENOBUFS); 7207 } 7208 7209 m_freem(m0); 7210 return 0; 7211 } 7212 7213 /* 7214 * SADB_X_PROMISC processing 7215 * 7216 * m will always be freed. 7217 */ 7218 static int 7219 key_promisc(struct socket *so, struct mbuf *m, 7220 const struct sadb_msghdr *mhp) 7221 { 7222 int olen; 7223 7224 /* sanity check */ 7225 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 7226 panic("key_promisc: NULL pointer is passed"); 7227 7228 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7229 7230 if (olen < sizeof(struct sadb_msg)) { 7231 #if 1 7232 return key_senderror(so, m, EINVAL); 7233 #else 7234 m_freem(m); 7235 return 0; 7236 #endif 7237 } else if (olen == sizeof(struct sadb_msg)) { 7238 /* enable/disable promisc mode */ 7239 struct keycb *kp; 7240 7241 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7242 return key_senderror(so, m, EINVAL); 7243 mhp->msg->sadb_msg_errno = 0; 7244 switch (mhp->msg->sadb_msg_satype) { 7245 case 0: 7246 case 1: 7247 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7248 break; 7249 default: 7250 return key_senderror(so, m, EINVAL); 7251 } 7252 7253 /* send the original message back to everyone */ 7254 mhp->msg->sadb_msg_errno = 0; 7255 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7256 } else { 7257 /* send packet as is */ 7258 7259 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7260 7261 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7262 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7263 } 7264 } 7265 7266 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7267 const struct sadb_msghdr *) = { 7268 NULL, /* SADB_RESERVED */ 7269 key_getspi, /* SADB_GETSPI */ 7270 key_update, /* SADB_UPDATE */ 7271 key_add, /* SADB_ADD */ 7272 key_delete, /* SADB_DELETE */ 7273 key_get, /* SADB_GET */ 7274 key_acquire2, /* SADB_ACQUIRE */ 7275 key_register, /* SADB_REGISTER */ 7276 NULL, /* SADB_EXPIRE */ 7277 key_flush, /* SADB_FLUSH */ 7278 key_dump, /* SADB_DUMP */ 7279 key_promisc, /* SADB_X_PROMISC */ 7280 NULL, /* SADB_X_PCHANGE */ 7281 key_spdadd, /* SADB_X_SPDUPDATE */ 7282 key_spdadd, /* SADB_X_SPDADD */ 7283 key_spddelete, /* SADB_X_SPDDELETE */ 7284 key_spdget, /* SADB_X_SPDGET */ 7285 NULL, /* SADB_X_SPDACQUIRE */ 7286 key_spddump, /* SADB_X_SPDDUMP */ 7287 key_spdflush, /* SADB_X_SPDFLUSH */ 7288 key_spdadd, /* SADB_X_SPDSETIDX */ 7289 NULL, /* SADB_X_SPDEXPIRE */ 7290 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7291 #ifdef IPSEC_NAT_T 7292 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7293 #endif 7294 }; 7295 7296 /* 7297 * parse sadb_msg buffer to process PFKEYv2, 7298 * and create a data to response if needed. 7299 * I think to be dealed with mbuf directly. 7300 * IN: 7301 * msgp : pointer to pointer to a received buffer pulluped. 7302 * This is rewrited to response. 7303 * so : pointer to socket. 7304 * OUT: 7305 * length for buffer to send to user process. 7306 */ 7307 int 7308 key_parse(struct mbuf *m, struct socket *so) 7309 { 7310 struct sadb_msg *msg; 7311 struct sadb_msghdr mh; 7312 u_int orglen; 7313 int error; 7314 int target; 7315 7316 /* sanity check */ 7317 if (m == NULL || so == NULL) 7318 panic("key_parse: NULL pointer is passed"); 7319 7320 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7321 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7322 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 7323 kdebug_sadb(msg)); 7324 #endif 7325 7326 if (m->m_len < sizeof(struct sadb_msg)) { 7327 m = m_pullup(m, sizeof(struct sadb_msg)); 7328 if (!m) 7329 return ENOBUFS; 7330 } 7331 msg = mtod(m, struct sadb_msg *); 7332 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7333 target = KEY_SENDUP_ONE; 7334 7335 if ((m->m_flags & M_PKTHDR) == 0 || 7336 m->m_pkthdr.len != m->m_pkthdr.len) { 7337 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 7338 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7339 error = EINVAL; 7340 goto senderror; 7341 } 7342 7343 if (msg->sadb_msg_version != PF_KEY_V2) { 7344 ipseclog((LOG_DEBUG, 7345 "key_parse: PF_KEY version %u is mismatched.\n", 7346 msg->sadb_msg_version)); 7347 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7348 error = EINVAL; 7349 goto senderror; 7350 } 7351 7352 if (msg->sadb_msg_type > SADB_MAX) { 7353 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7354 msg->sadb_msg_type)); 7355 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7356 error = EINVAL; 7357 goto senderror; 7358 } 7359 7360 /* for old-fashioned code - should be nuked */ 7361 if (m->m_pkthdr.len > MCLBYTES) { 7362 m_freem(m); 7363 return ENOBUFS; 7364 } 7365 if (m->m_next) { 7366 struct mbuf *n; 7367 7368 MGETHDR(n, M_DONTWAIT, MT_DATA); 7369 if (n && m->m_pkthdr.len > MHLEN) { 7370 MCLGET(n, M_DONTWAIT); 7371 if ((n->m_flags & M_EXT) == 0) { 7372 m_free(n); 7373 n = NULL; 7374 } 7375 } 7376 if (!n) { 7377 m_freem(m); 7378 return ENOBUFS; 7379 } 7380 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7381 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7382 n->m_next = NULL; 7383 m_freem(m); 7384 m = n; 7385 } 7386 7387 /* align the mbuf chain so that extensions are in contiguous region. */ 7388 error = key_align(m, &mh); 7389 if (error) 7390 return error; 7391 7392 if (m->m_next) { /*XXX*/ 7393 m_freem(m); 7394 return ENOBUFS; 7395 } 7396 7397 msg = mh.msg; 7398 7399 /* check SA type */ 7400 switch (msg->sadb_msg_satype) { 7401 case SADB_SATYPE_UNSPEC: 7402 switch (msg->sadb_msg_type) { 7403 case SADB_GETSPI: 7404 case SADB_UPDATE: 7405 case SADB_ADD: 7406 case SADB_DELETE: 7407 case SADB_GET: 7408 case SADB_ACQUIRE: 7409 case SADB_EXPIRE: 7410 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7411 "when msg type=%u.\n", msg->sadb_msg_type)); 7412 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7413 error = EINVAL; 7414 goto senderror; 7415 } 7416 break; 7417 case SADB_SATYPE_AH: 7418 case SADB_SATYPE_ESP: 7419 case SADB_X_SATYPE_IPCOMP: 7420 case SADB_X_SATYPE_TCPSIGNATURE: 7421 switch (msg->sadb_msg_type) { 7422 case SADB_X_SPDADD: 7423 case SADB_X_SPDDELETE: 7424 case SADB_X_SPDGET: 7425 case SADB_X_SPDDUMP: 7426 case SADB_X_SPDFLUSH: 7427 case SADB_X_SPDSETIDX: 7428 case SADB_X_SPDUPDATE: 7429 case SADB_X_SPDDELETE2: 7430 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7431 msg->sadb_msg_type)); 7432 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7433 error = EINVAL; 7434 goto senderror; 7435 } 7436 break; 7437 case SADB_SATYPE_RSVP: 7438 case SADB_SATYPE_OSPFV2: 7439 case SADB_SATYPE_RIPV2: 7440 case SADB_SATYPE_MIP: 7441 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7442 msg->sadb_msg_satype)); 7443 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7444 error = EOPNOTSUPP; 7445 goto senderror; 7446 case 1: /* XXX: What does it do? */ 7447 if (msg->sadb_msg_type == SADB_X_PROMISC) 7448 break; 7449 /*FALLTHROUGH*/ 7450 default: 7451 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7452 msg->sadb_msg_satype)); 7453 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7454 error = EINVAL; 7455 goto senderror; 7456 } 7457 7458 /* check field of upper layer protocol and address family */ 7459 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7460 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7461 struct sadb_address *src0, *dst0; 7462 u_int plen; 7463 7464 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7465 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7466 7467 /* check upper layer protocol */ 7468 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7469 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7470 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7471 error = EINVAL; 7472 goto senderror; 7473 } 7474 7475 /* check family */ 7476 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7477 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7478 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7479 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7480 error = EINVAL; 7481 goto senderror; 7482 } 7483 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7484 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7485 ipseclog((LOG_DEBUG, 7486 "key_parse: address struct size mismatched.\n")); 7487 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7488 error = EINVAL; 7489 goto senderror; 7490 } 7491 7492 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7493 case AF_INET: 7494 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7495 sizeof(struct sockaddr_in)) { 7496 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7497 error = EINVAL; 7498 goto senderror; 7499 } 7500 break; 7501 case AF_INET6: 7502 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7503 sizeof(struct sockaddr_in6)) { 7504 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7505 error = EINVAL; 7506 goto senderror; 7507 } 7508 break; 7509 default: 7510 ipseclog((LOG_DEBUG, 7511 "key_parse: unsupported address family.\n")); 7512 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7513 error = EAFNOSUPPORT; 7514 goto senderror; 7515 } 7516 7517 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7518 case AF_INET: 7519 plen = sizeof(struct in_addr) << 3; 7520 break; 7521 case AF_INET6: 7522 plen = sizeof(struct in6_addr) << 3; 7523 break; 7524 default: 7525 plen = 0; /*fool gcc*/ 7526 break; 7527 } 7528 7529 /* check max prefix length */ 7530 if (src0->sadb_address_prefixlen > plen || 7531 dst0->sadb_address_prefixlen > plen) { 7532 ipseclog((LOG_DEBUG, 7533 "key_parse: illegal prefixlen.\n")); 7534 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7535 error = EINVAL; 7536 goto senderror; 7537 } 7538 7539 /* 7540 * prefixlen == 0 is valid because there can be a case when 7541 * all addresses are matched. 7542 */ 7543 } 7544 7545 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7546 key_typesw[msg->sadb_msg_type] == NULL) { 7547 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7548 error = EINVAL; 7549 goto senderror; 7550 } 7551 7552 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7553 7554 senderror: 7555 msg->sadb_msg_errno = error; 7556 return key_sendup_mbuf(so, m, target); 7557 } 7558 7559 static int 7560 key_senderror(struct socket *so, struct mbuf *m, int code) 7561 { 7562 struct sadb_msg *msg; 7563 7564 if (m->m_len < sizeof(struct sadb_msg)) 7565 panic("invalid mbuf passed to key_senderror"); 7566 7567 msg = mtod(m, struct sadb_msg *); 7568 msg->sadb_msg_errno = code; 7569 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7570 } 7571 7572 /* 7573 * set the pointer to each header into message buffer. 7574 * m will be freed on error. 7575 * XXX larger-than-MCLBYTES extension? 7576 */ 7577 static int 7578 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7579 { 7580 struct mbuf *n; 7581 struct sadb_ext *ext; 7582 size_t off, end; 7583 int extlen; 7584 int toff; 7585 7586 /* sanity check */ 7587 if (m == NULL || mhp == NULL) 7588 panic("key_align: NULL pointer is passed"); 7589 if (m->m_len < sizeof(struct sadb_msg)) 7590 panic("invalid mbuf passed to key_align"); 7591 7592 /* initialize */ 7593 memset(mhp, 0, sizeof(*mhp)); 7594 7595 mhp->msg = mtod(m, struct sadb_msg *); 7596 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7597 7598 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7599 extlen = end; /*just in case extlen is not updated*/ 7600 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7601 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7602 if (!n) { 7603 /* m is already freed */ 7604 return ENOBUFS; 7605 } 7606 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7607 7608 /* set pointer */ 7609 switch (ext->sadb_ext_type) { 7610 case SADB_EXT_SA: 7611 case SADB_EXT_ADDRESS_SRC: 7612 case SADB_EXT_ADDRESS_DST: 7613 case SADB_EXT_ADDRESS_PROXY: 7614 case SADB_EXT_LIFETIME_CURRENT: 7615 case SADB_EXT_LIFETIME_HARD: 7616 case SADB_EXT_LIFETIME_SOFT: 7617 case SADB_EXT_KEY_AUTH: 7618 case SADB_EXT_KEY_ENCRYPT: 7619 case SADB_EXT_IDENTITY_SRC: 7620 case SADB_EXT_IDENTITY_DST: 7621 case SADB_EXT_SENSITIVITY: 7622 case SADB_EXT_PROPOSAL: 7623 case SADB_EXT_SUPPORTED_AUTH: 7624 case SADB_EXT_SUPPORTED_ENCRYPT: 7625 case SADB_EXT_SPIRANGE: 7626 case SADB_X_EXT_POLICY: 7627 case SADB_X_EXT_SA2: 7628 #ifdef IPSEC_NAT_T 7629 case SADB_X_EXT_NAT_T_TYPE: 7630 case SADB_X_EXT_NAT_T_SPORT: 7631 case SADB_X_EXT_NAT_T_DPORT: 7632 case SADB_X_EXT_NAT_T_OAI: 7633 case SADB_X_EXT_NAT_T_OAR: 7634 case SADB_X_EXT_NAT_T_FRAG: 7635 #endif 7636 /* duplicate check */ 7637 /* 7638 * XXX Are there duplication payloads of either 7639 * KEY_AUTH or KEY_ENCRYPT ? 7640 */ 7641 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7642 ipseclog((LOG_DEBUG, 7643 "key_align: duplicate ext_type %u " 7644 "is passed.\n", ext->sadb_ext_type)); 7645 m_freem(m); 7646 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7647 return EINVAL; 7648 } 7649 break; 7650 default: 7651 ipseclog((LOG_DEBUG, 7652 "key_align: invalid ext_type %u is passed.\n", 7653 ext->sadb_ext_type)); 7654 m_freem(m); 7655 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7656 return EINVAL; 7657 } 7658 7659 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7660 7661 if (key_validate_ext(ext, extlen)) { 7662 m_freem(m); 7663 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7664 return EINVAL; 7665 } 7666 7667 n = m_pulldown(m, off, extlen, &toff); 7668 if (!n) { 7669 /* m is already freed */ 7670 return ENOBUFS; 7671 } 7672 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7673 7674 mhp->ext[ext->sadb_ext_type] = ext; 7675 mhp->extoff[ext->sadb_ext_type] = off; 7676 mhp->extlen[ext->sadb_ext_type] = extlen; 7677 } 7678 7679 if (off != end) { 7680 m_freem(m); 7681 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7682 return EINVAL; 7683 } 7684 7685 return 0; 7686 } 7687 7688 static int 7689 key_validate_ext(const struct sadb_ext *ext, int len) 7690 { 7691 const struct sockaddr *sa; 7692 enum { NONE, ADDR } checktype = NONE; 7693 int baselen = 0; 7694 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7695 7696 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7697 return EINVAL; 7698 7699 /* if it does not match minimum/maximum length, bail */ 7700 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7701 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7702 return EINVAL; 7703 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7704 return EINVAL; 7705 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7706 return EINVAL; 7707 7708 /* more checks based on sadb_ext_type XXX need more */ 7709 switch (ext->sadb_ext_type) { 7710 case SADB_EXT_ADDRESS_SRC: 7711 case SADB_EXT_ADDRESS_DST: 7712 case SADB_EXT_ADDRESS_PROXY: 7713 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7714 checktype = ADDR; 7715 break; 7716 case SADB_EXT_IDENTITY_SRC: 7717 case SADB_EXT_IDENTITY_DST: 7718 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7719 SADB_X_IDENTTYPE_ADDR) { 7720 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7721 checktype = ADDR; 7722 } else 7723 checktype = NONE; 7724 break; 7725 default: 7726 checktype = NONE; 7727 break; 7728 } 7729 7730 switch (checktype) { 7731 case NONE: 7732 break; 7733 case ADDR: 7734 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7735 if (len < baselen + sal) 7736 return EINVAL; 7737 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7738 return EINVAL; 7739 break; 7740 } 7741 7742 return 0; 7743 } 7744 7745 static int 7746 key_do_init(void) 7747 { 7748 int i; 7749 7750 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7751 7752 callout_init(&key_timehandler_ch, 0); 7753 7754 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7755 LIST_INIT(&sptree[i]); 7756 } 7757 7758 LIST_INIT(&sahtree); 7759 7760 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7761 LIST_INIT(®tree[i]); 7762 } 7763 7764 #ifndef IPSEC_NONBLOCK_ACQUIRE 7765 LIST_INIT(&acqtree); 7766 #endif 7767 LIST_INIT(&spacqtree); 7768 7769 /* system default */ 7770 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7771 ip4_def_policy.refcnt++; /*never reclaim this*/ 7772 7773 #ifdef INET6 7774 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7775 ip6_def_policy.refcnt++; /*never reclaim this*/ 7776 #endif 7777 7778 7779 #ifndef IPSEC_DEBUG2 7780 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7781 #endif /*IPSEC_DEBUG2*/ 7782 7783 /* initialize key statistics */ 7784 keystat.getspi_count = 1; 7785 7786 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7787 7788 return (0); 7789 } 7790 7791 void 7792 key_init(void) 7793 { 7794 static ONCE_DECL(key_init_once); 7795 7796 RUN_ONCE(&key_init_once, key_do_init); 7797 } 7798 7799 /* 7800 * XXX: maybe This function is called after INBOUND IPsec processing. 7801 * 7802 * Special check for tunnel-mode packets. 7803 * We must make some checks for consistency between inner and outer IP header. 7804 * 7805 * xxx more checks to be provided 7806 */ 7807 int 7808 key_checktunnelsanity( 7809 struct secasvar *sav, 7810 u_int family, 7811 void *src, 7812 void *dst 7813 ) 7814 { 7815 /* sanity check */ 7816 if (sav->sah == NULL) 7817 panic("sav->sah == NULL at key_checktunnelsanity"); 7818 7819 /* XXX: check inner IP header */ 7820 7821 return 1; 7822 } 7823 7824 #if 0 7825 #define hostnamelen strlen(hostname) 7826 7827 /* 7828 * Get FQDN for the host. 7829 * If the administrator configured hostname (by hostname(1)) without 7830 * domain name, returns nothing. 7831 */ 7832 static const char * 7833 key_getfqdn(void) 7834 { 7835 int i; 7836 int hasdot; 7837 static char fqdn[MAXHOSTNAMELEN + 1]; 7838 7839 if (!hostnamelen) 7840 return NULL; 7841 7842 /* check if it comes with domain name. */ 7843 hasdot = 0; 7844 for (i = 0; i < hostnamelen; i++) { 7845 if (hostname[i] == '.') 7846 hasdot++; 7847 } 7848 if (!hasdot) 7849 return NULL; 7850 7851 /* NOTE: hostname may not be NUL-terminated. */ 7852 memset(fqdn, 0, sizeof(fqdn)); 7853 memcpy(fqdn, hostname, hostnamelen); 7854 fqdn[hostnamelen] = '\0'; 7855 return fqdn; 7856 } 7857 7858 /* 7859 * get username@FQDN for the host/user. 7860 */ 7861 static const char * 7862 key_getuserfqdn(void) 7863 { 7864 const char *host; 7865 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7866 struct proc *p = curproc; 7867 char *q; 7868 7869 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7870 return NULL; 7871 if (!(host = key_getfqdn())) 7872 return NULL; 7873 7874 /* NOTE: s_login may not be-NUL terminated. */ 7875 memset(userfqdn, 0, sizeof(userfqdn)); 7876 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7877 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7878 q = userfqdn + strlen(userfqdn); 7879 *q++ = '@'; 7880 memcpy(q, host, strlen(host)); 7881 q += strlen(host); 7882 *q++ = '\0'; 7883 7884 return userfqdn; 7885 } 7886 #endif 7887 7888 /* record data transfer on SA, and update timestamps */ 7889 void 7890 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7891 { 7892 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7893 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7894 if (!sav->lft_c) 7895 return; 7896 7897 /* 7898 * XXX Currently, there is a difference of bytes size 7899 * between inbound and outbound processing. 7900 */ 7901 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7902 /* to check bytes lifetime is done in key_timehandler(). */ 7903 7904 /* 7905 * We use the number of packets as the unit of 7906 * sadb_lifetime_allocations. We increment the variable 7907 * whenever {esp,ah}_{in,out}put is called. 7908 */ 7909 sav->lft_c->sadb_lifetime_allocations++; 7910 /* XXX check for expires? */ 7911 7912 /* 7913 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7914 * in seconds. HARD and SOFT lifetime are measured by the time 7915 * difference (again in seconds) from sadb_lifetime_usetime. 7916 * 7917 * usetime 7918 * v expire expire 7919 * -----+-----+--------+---> t 7920 * <--------------> HARD 7921 * <-----> SOFT 7922 */ 7923 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7924 /* XXX check for expires? */ 7925 7926 return; 7927 } 7928 7929 /* dumb version */ 7930 void 7931 key_sa_routechange(struct sockaddr *dst) 7932 { 7933 struct secashead *sah; 7934 struct route *ro; 7935 const struct sockaddr *sa; 7936 7937 LIST_FOREACH(sah, &sahtree, chain) { 7938 ro = &sah->sa_route; 7939 sa = rtcache_getdst(ro); 7940 if (sa != NULL && dst->sa_len == sa->sa_len && 7941 memcmp(dst, sa, dst->sa_len) == 0) 7942 rtcache_free(ro); 7943 } 7944 7945 return; 7946 } 7947 7948 static void 7949 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7950 { 7951 if (sav == NULL) 7952 panic("key_sa_chgstate called with sav == NULL"); 7953 7954 if (sav->state == state) 7955 return; 7956 7957 if (__LIST_CHAINED(sav)) 7958 LIST_REMOVE(sav, chain); 7959 7960 sav->state = state; 7961 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7962 } 7963 7964 /* XXX too much? */ 7965 static struct mbuf * 7966 key_alloc_mbuf(int l) 7967 { 7968 struct mbuf *m = NULL, *n; 7969 int len, t; 7970 7971 len = l; 7972 while (len > 0) { 7973 MGET(n, M_DONTWAIT, MT_DATA); 7974 if (n && len > MLEN) 7975 MCLGET(n, M_DONTWAIT); 7976 if (!n) { 7977 m_freem(m); 7978 return NULL; 7979 } 7980 7981 n->m_next = NULL; 7982 n->m_len = 0; 7983 n->m_len = M_TRAILINGSPACE(n); 7984 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7985 if (n->m_len > len) { 7986 t = (n->m_len - len) & ~(sizeof(long) - 1); 7987 n->m_data += t; 7988 n->m_len = len; 7989 } 7990 7991 len -= n->m_len; 7992 7993 if (m) 7994 m_cat(m, n); 7995 else 7996 m = n; 7997 } 7998 7999 return m; 8000 } 8001 8002 static struct mbuf * 8003 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 8004 { 8005 struct secashead *sah; 8006 struct secasvar *sav; 8007 u_int16_t proto; 8008 u_int stateidx; 8009 u_int8_t satype; 8010 u_int8_t state; 8011 int cnt; 8012 struct mbuf *m, *n; 8013 8014 /* map satype to proto */ 8015 if ((proto = key_satype2proto(req_satype)) == 0) { 8016 *errorp = EINVAL; 8017 return (NULL); 8018 } 8019 8020 /* count sav entries to be sent to the userland. */ 8021 cnt = 0; 8022 LIST_FOREACH(sah, &sahtree, chain) { 8023 if (req_satype != SADB_SATYPE_UNSPEC && 8024 proto != sah->saidx.proto) 8025 continue; 8026 8027 for (stateidx = 0; 8028 stateidx < _ARRAYLEN(saorder_state_any); 8029 stateidx++) { 8030 state = saorder_state_any[stateidx]; 8031 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8032 cnt++; 8033 } 8034 } 8035 } 8036 8037 if (cnt == 0) { 8038 *errorp = ENOENT; 8039 return (NULL); 8040 } 8041 8042 /* send this to the userland, one at a time. */ 8043 m = NULL; 8044 LIST_FOREACH(sah, &sahtree, chain) { 8045 if (req_satype != SADB_SATYPE_UNSPEC && 8046 proto != sah->saidx.proto) 8047 continue; 8048 8049 /* map proto to satype */ 8050 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 8051 m_freem(m); 8052 *errorp = EINVAL; 8053 return (NULL); 8054 } 8055 8056 for (stateidx = 0; 8057 stateidx < _ARRAYLEN(saorder_state_any); 8058 stateidx++) { 8059 state = saorder_state_any[stateidx]; 8060 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8061 n = key_setdumpsa(sav, SADB_DUMP, satype, 8062 --cnt, pid); 8063 if (!n) { 8064 m_freem(m); 8065 *errorp = ENOBUFS; 8066 return (NULL); 8067 } 8068 8069 if (!m) 8070 m = n; 8071 else 8072 m_cat(m, n); 8073 } 8074 } 8075 } 8076 8077 if (!m) { 8078 *errorp = EINVAL; 8079 return (NULL); 8080 } 8081 8082 if ((m->m_flags & M_PKTHDR) != 0) { 8083 m->m_pkthdr.len = 0; 8084 for (n = m; n; n = n->m_next) 8085 m->m_pkthdr.len += n->m_len; 8086 } 8087 8088 *errorp = 0; 8089 return (m); 8090 } 8091 8092 static struct mbuf * 8093 key_setspddump(int *errorp, pid_t pid) 8094 { 8095 struct secpolicy *sp; 8096 int cnt; 8097 u_int dir; 8098 struct mbuf *m, *n; 8099 8100 /* search SPD entry and get buffer size. */ 8101 cnt = 0; 8102 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8103 LIST_FOREACH(sp, &sptree[dir], chain) { 8104 cnt++; 8105 } 8106 } 8107 8108 if (cnt == 0) { 8109 *errorp = ENOENT; 8110 return (NULL); 8111 } 8112 8113 m = NULL; 8114 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8115 LIST_FOREACH(sp, &sptree[dir], chain) { 8116 --cnt; 8117 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8118 8119 if (!n) { 8120 *errorp = ENOBUFS; 8121 m_freem(m); 8122 return (NULL); 8123 } 8124 if (!m) 8125 m = n; 8126 else { 8127 m->m_pkthdr.len += n->m_pkthdr.len; 8128 m_cat(m, n); 8129 } 8130 } 8131 } 8132 8133 *errorp = 0; 8134 return (m); 8135 } 8136 8137 static int 8138 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8139 { 8140 struct mbuf *m, *n; 8141 int err2 = 0; 8142 char *p, *ep; 8143 size_t len; 8144 int s, error; 8145 8146 if (newp) 8147 return (EPERM); 8148 if (namelen != 1) 8149 return (EINVAL); 8150 8151 s = splsoftnet(); 8152 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8153 splx(s); 8154 if (!m) 8155 return (error); 8156 if (!oldp) 8157 *oldlenp = m->m_pkthdr.len; 8158 else { 8159 p = oldp; 8160 if (*oldlenp < m->m_pkthdr.len) { 8161 err2 = ENOMEM; 8162 ep = p + *oldlenp; 8163 } else { 8164 *oldlenp = m->m_pkthdr.len; 8165 ep = p + m->m_pkthdr.len; 8166 } 8167 for (n = m; n; n = n->m_next) { 8168 len = (ep - p < n->m_len) ? 8169 ep - p : n->m_len; 8170 error = copyout(mtod(n, const void *), p, len); 8171 p += len; 8172 if (error) 8173 break; 8174 } 8175 if (error == 0) 8176 error = err2; 8177 } 8178 m_freem(m); 8179 8180 return (error); 8181 } 8182 8183 static int 8184 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8185 { 8186 struct mbuf *m, *n; 8187 int err2 = 0; 8188 char *p, *ep; 8189 size_t len; 8190 int s, error; 8191 8192 if (newp) 8193 return (EPERM); 8194 if (namelen != 0) 8195 return (EINVAL); 8196 8197 s = splsoftnet(); 8198 m = key_setspddump(&error, l->l_proc->p_pid); 8199 splx(s); 8200 if (!m) 8201 return (error); 8202 if (!oldp) 8203 *oldlenp = m->m_pkthdr.len; 8204 else { 8205 p = oldp; 8206 if (*oldlenp < m->m_pkthdr.len) { 8207 err2 = ENOMEM; 8208 ep = p + *oldlenp; 8209 } else { 8210 *oldlenp = m->m_pkthdr.len; 8211 ep = p + m->m_pkthdr.len; 8212 } 8213 for (n = m; n; n = n->m_next) { 8214 len = (ep - p < n->m_len) ? 8215 ep - p : n->m_len; 8216 error = copyout(mtod(n, const void *), p, len); 8217 p += len; 8218 if (error) 8219 break; 8220 } 8221 if (error == 0) 8222 error = err2; 8223 } 8224 m_freem(m); 8225 8226 return (error); 8227 } 8228 8229 /* 8230 * Create sysctl tree for native FAST_IPSEC key knobs, originally 8231 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8232 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8233 * and in any case the part of our sysctl namespace used for dumping the 8234 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8235 * namespace, for API reasons. 8236 * 8237 * Pending a consensus on the right way to fix this, add a level of 8238 * indirection in how we number the `native' FAST_IPSEC key nodes; 8239 * and (as requested by Andrew Brown) move registration of the 8240 * KAME-compatible names to a separate function. 8241 */ 8242 #if 0 8243 # define FAST_IPSEC_PFKEY PF_KEY_V2 8244 # define FAST_IPSEC_PFKEY_NAME "keyv2" 8245 #else 8246 # define FAST_IPSEC_PFKEY PF_KEY 8247 # define FAST_IPSEC_PFKEY_NAME "key" 8248 #endif 8249 8250 static int 8251 sysctl_net_key_stats(SYSCTLFN_ARGS) 8252 { 8253 8254 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8255 } 8256 8257 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 8258 { 8259 8260 sysctl_createv(clog, 0, NULL, NULL, 8261 CTLFLAG_PERMANENT, 8262 CTLTYPE_NODE, "net", NULL, 8263 NULL, 0, NULL, 0, 8264 CTL_NET, CTL_EOL); 8265 sysctl_createv(clog, 0, NULL, NULL, 8266 CTLFLAG_PERMANENT, 8267 CTLTYPE_NODE, FAST_IPSEC_PFKEY_NAME, NULL, 8268 NULL, 0, NULL, 0, 8269 CTL_NET, FAST_IPSEC_PFKEY, CTL_EOL); 8270 8271 sysctl_createv(clog, 0, NULL, NULL, 8272 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8273 CTLTYPE_INT, "debug", NULL, 8274 NULL, 0, &key_debug_level, 0, 8275 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8276 sysctl_createv(clog, 0, NULL, NULL, 8277 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8278 CTLTYPE_INT, "spi_try", NULL, 8279 NULL, 0, &key_spi_trycnt, 0, 8280 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8281 sysctl_createv(clog, 0, NULL, NULL, 8282 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8283 CTLTYPE_INT, "spi_min_value", NULL, 8284 NULL, 0, &key_spi_minval, 0, 8285 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8286 sysctl_createv(clog, 0, NULL, NULL, 8287 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8288 CTLTYPE_INT, "spi_max_value", NULL, 8289 NULL, 0, &key_spi_maxval, 0, 8290 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8291 sysctl_createv(clog, 0, NULL, NULL, 8292 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8293 CTLTYPE_INT, "random_int", NULL, 8294 NULL, 0, &key_int_random, 0, 8295 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8296 sysctl_createv(clog, 0, NULL, NULL, 8297 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8298 CTLTYPE_INT, "larval_lifetime", NULL, 8299 NULL, 0, &key_larval_lifetime, 0, 8300 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8301 sysctl_createv(clog, 0, NULL, NULL, 8302 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8303 CTLTYPE_INT, "blockacq_count", NULL, 8304 NULL, 0, &key_blockacq_count, 0, 8305 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8306 sysctl_createv(clog, 0, NULL, NULL, 8307 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8308 CTLTYPE_INT, "blockacq_lifetime", NULL, 8309 NULL, 0, &key_blockacq_lifetime, 0, 8310 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8311 sysctl_createv(clog, 0, NULL, NULL, 8312 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8313 CTLTYPE_INT, "esp_keymin", NULL, 8314 NULL, 0, &ipsec_esp_keymin, 0, 8315 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8316 sysctl_createv(clog, 0, NULL, NULL, 8317 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8318 CTLTYPE_INT, "prefered_oldsa", NULL, 8319 NULL, 0, &key_prefered_oldsa, 0, 8320 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8321 sysctl_createv(clog, 0, NULL, NULL, 8322 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8323 CTLTYPE_INT, "esp_auth", NULL, 8324 NULL, 0, &ipsec_esp_auth, 0, 8325 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8326 sysctl_createv(clog, 0, NULL, NULL, 8327 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8328 CTLTYPE_INT, "ah_keymin", NULL, 8329 NULL, 0, &ipsec_ah_keymin, 0, 8330 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8331 sysctl_createv(clog, 0, NULL, NULL, 8332 CTLFLAG_PERMANENT, 8333 CTLTYPE_STRUCT, "stats", 8334 SYSCTL_DESCR("PF_KEY statistics"), 8335 sysctl_net_key_stats, 0, NULL, 0, 8336 CTL_NET, FAST_IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8337 } 8338 8339 /* 8340 * Register sysctl names used by setkey(8). For historical reasons, 8341 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8342 * for both FAST_IPSEC and KAME IPSEC. 8343 */ 8344 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for FAST_IPSEC") 8345 { 8346 8347 /* Make sure net.key exists before we register nodes underneath it. */ 8348 sysctl_createv(clog, 0, NULL, NULL, 8349 CTLFLAG_PERMANENT, 8350 CTLTYPE_NODE, "net", NULL, 8351 NULL, 0, NULL, 0, 8352 CTL_NET, CTL_EOL); 8353 sysctl_createv(clog, 0, NULL, NULL, 8354 CTLFLAG_PERMANENT, 8355 CTLTYPE_NODE, "key", NULL, 8356 NULL, 0, NULL, 0, 8357 CTL_NET, PF_KEY, CTL_EOL); 8358 8359 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8360 sysctl_createv(clog, 0, NULL, NULL, 8361 CTLFLAG_PERMANENT, 8362 CTLTYPE_STRUCT, "dumpsa", NULL, 8363 sysctl_net_key_dumpsa, 0, NULL, 0, 8364 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8365 sysctl_createv(clog, 0, NULL, NULL, 8366 CTLFLAG_PERMANENT, 8367 CTLTYPE_STRUCT, "dumpsp", NULL, 8368 sysctl_net_key_dumpsp, 0, NULL, 0, 8369 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8370 } 8371