key.c revision 1.113
1 /* $NetBSD: key.c,v 1.113 2017/04/19 09:22:17 ozaki-r 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 1.113 2017/04/19 09:22:17 ozaki-r Exp $"); 36 37 /* 38 * This code is referd to RFC 2367 39 */ 40 41 #if defined(_KERNEL_OPT) 42 #include "opt_inet.h" 43 #include "opt_ipsec.h" 44 #include "opt_gateway.h" 45 #endif 46 47 #include <sys/types.h> 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/callout.h> 51 #include <sys/kernel.h> 52 #include <sys/mbuf.h> 53 #include <sys/domain.h> 54 #include <sys/protosw.h> 55 #include <sys/malloc.h> 56 #include <sys/socket.h> 57 #include <sys/socketvar.h> 58 #include <sys/sysctl.h> 59 #include <sys/errno.h> 60 #include <sys/proc.h> 61 #include <sys/queue.h> 62 #include <sys/syslog.h> 63 #include <sys/once.h> 64 #include <sys/cprng.h> 65 #include <sys/psref.h> 66 #include <sys/lwp.h> 67 68 #include <net/if.h> 69 #include <net/route.h> 70 #include <net/raw_cb.h> 71 72 #include <netinet/in.h> 73 #include <netinet/in_systm.h> 74 #include <netinet/ip.h> 75 #include <netinet/in_var.h> 76 #ifdef INET 77 #include <netinet/ip_var.h> 78 #endif 79 80 #ifdef INET6 81 #include <netinet/ip6.h> 82 #include <netinet6/in6_var.h> 83 #include <netinet6/ip6_var.h> 84 #endif /* INET6 */ 85 86 #ifdef INET 87 #include <netinet/in_pcb.h> 88 #endif 89 #ifdef INET6 90 #include <netinet6/in6_pcb.h> 91 #endif /* INET6 */ 92 93 #include <net/pfkeyv2.h> 94 #include <netipsec/keydb.h> 95 #include <netipsec/key.h> 96 #include <netipsec/keysock.h> 97 #include <netipsec/key_debug.h> 98 99 #include <netipsec/ipsec.h> 100 #ifdef INET6 101 #include <netipsec/ipsec6.h> 102 #endif 103 #include <netipsec/ipsec_private.h> 104 105 #include <netipsec/xform.h> 106 #include <netipsec/ipcomp.h> 107 108 109 #include <net/net_osdep.h> 110 111 #define FULLMASK 0xff 112 #define _BITS(bytes) ((bytes) << 3) 113 114 #define PORT_NONE 0 115 #define PORT_LOOSE 1 116 #define PORT_STRICT 2 117 118 percpu_t *pfkeystat_percpu; 119 120 /* 121 * Note on SA reference counting: 122 * - SAs that are not in DEAD state will have (total external reference + 1) 123 * following value in reference count field. they cannot be freed and are 124 * referenced from SA header. 125 * - SAs that are in DEAD state will have (total external reference) 126 * in reference count field. they are ready to be freed. reference from 127 * SA header will be removed in key_delsav(), when the reference count 128 * field hits 0 (= no external reference other than from SA header. 129 */ 130 131 u_int32_t key_debug_level = 0; 132 static u_int key_spi_trycnt = 1000; 133 static u_int32_t key_spi_minval = 0x100; 134 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 135 static u_int32_t policy_id = 0; 136 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 137 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 138 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 139 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 140 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 141 142 static u_int32_t acq_seq = 0; 143 144 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 145 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 146 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 147 /* registed list */ 148 #ifndef IPSEC_NONBLOCK_ACQUIRE 149 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 150 #endif 151 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 152 153 /* search order for SAs */ 154 /* 155 * This order is important because we must select the oldest SA 156 * for outbound processing. For inbound, This is not important. 157 */ 158 static const u_int saorder_state_valid_prefer_old[] = { 159 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 160 }; 161 static const u_int saorder_state_valid_prefer_new[] = { 162 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 163 }; 164 165 static const u_int saorder_state_alive[] = { 166 /* except DEAD */ 167 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 168 }; 169 static const u_int saorder_state_any[] = { 170 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 171 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 172 }; 173 174 static const int minsize[] = { 175 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 176 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 177 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 178 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 179 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 180 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 181 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 182 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 183 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 184 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 185 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 186 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 187 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 188 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 189 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 190 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 191 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 192 0, /* SADB_X_EXT_KMPRIVATE */ 193 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 194 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 195 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 196 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 197 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 198 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 199 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 200 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 201 }; 202 static const int maxsize[] = { 203 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 204 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 205 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 206 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 207 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 208 0, /* SADB_EXT_ADDRESS_SRC */ 209 0, /* SADB_EXT_ADDRESS_DST */ 210 0, /* SADB_EXT_ADDRESS_PROXY */ 211 0, /* SADB_EXT_KEY_AUTH */ 212 0, /* SADB_EXT_KEY_ENCRYPT */ 213 0, /* SADB_EXT_IDENTITY_SRC */ 214 0, /* SADB_EXT_IDENTITY_DST */ 215 0, /* SADB_EXT_SENSITIVITY */ 216 0, /* SADB_EXT_PROPOSAL */ 217 0, /* SADB_EXT_SUPPORTED_AUTH */ 218 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 219 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 220 0, /* SADB_X_EXT_KMPRIVATE */ 221 0, /* SADB_X_EXT_POLICY */ 222 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 223 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 224 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 225 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 226 0, /* SADB_X_EXT_NAT_T_OAI */ 227 0, /* SADB_X_EXT_NAT_T_OAR */ 228 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 229 }; 230 231 static int ipsec_esp_keymin = 256; 232 static int ipsec_esp_auth = 0; 233 static int ipsec_ah_keymin = 128; 234 235 #ifdef SYSCTL_DECL 236 SYSCTL_DECL(_net_key); 237 #endif 238 239 #ifdef SYSCTL_INT 240 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 241 &key_debug_level, 0, ""); 242 243 /* max count of trial for the decision of spi value */ 244 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 245 &key_spi_trycnt, 0, ""); 246 247 /* minimum spi value to allocate automatically. */ 248 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 249 &key_spi_minval, 0, ""); 250 251 /* maximun spi value to allocate automatically. */ 252 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 253 &key_spi_maxval, 0, ""); 254 255 /* interval to initialize randseed */ 256 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 257 &key_int_random, 0, ""); 258 259 /* lifetime for larval SA */ 260 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 261 &key_larval_lifetime, 0, ""); 262 263 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 264 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 265 &key_blockacq_count, 0, ""); 266 267 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 268 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 269 &key_blockacq_lifetime, 0, ""); 270 271 /* ESP auth */ 272 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 273 &ipsec_esp_auth, 0, ""); 274 275 /* minimum ESP key length */ 276 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 277 &ipsec_esp_keymin, 0, ""); 278 279 /* minimum AH key length */ 280 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 281 &ipsec_ah_keymin, 0, ""); 282 283 /* perfered old SA rather than new SA */ 284 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 285 &key_prefered_oldsa, 0, ""); 286 #endif /* SYSCTL_INT */ 287 288 #ifndef LIST_FOREACH 289 #define LIST_FOREACH(elm, head, field) \ 290 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field)) 291 #endif 292 #define __LIST_CHAINED(elm) \ 293 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 294 #define LIST_INSERT_TAIL(head, elm, type, field) \ 295 do {\ 296 struct type *curelm = LIST_FIRST(head); \ 297 if (curelm == NULL) {\ 298 LIST_INSERT_HEAD(head, elm, field); \ 299 } else { \ 300 while (LIST_NEXT(curelm, field)) \ 301 curelm = LIST_NEXT(curelm, field);\ 302 LIST_INSERT_AFTER(curelm, elm, field);\ 303 }\ 304 } while (0) 305 306 #define KEY_CHKSASTATE(head, sav, name) \ 307 /* do */ { \ 308 if ((head) != (sav)) { \ 309 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 310 (name), (head), (sav))); \ 311 continue; \ 312 } \ 313 } /* while (0) */ 314 315 #define KEY_CHKSPDIR(head, sp, name) \ 316 do { \ 317 if ((head) != (sp)) { \ 318 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 319 "anyway continue.\n", \ 320 (name), (head), (sp))); \ 321 } \ 322 } while (0) 323 324 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management"); 325 326 #if 1 327 #define KMALLOC(p, t, n) \ 328 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT)) 329 #define KFREE(p) \ 330 free((p), M_SECA) 331 #else 332 #define KMALLOC(p, t, n) \ 333 do { \ 334 ((p) = malloc((unsigned long)(n), M_SECA, M_NOWAIT)); \ 335 printf("%s %d: %p <- KMALLOC(%s, %d)\n", \ 336 __FILE__, __LINE__, (p), #t, n); \ 337 } while (0) 338 339 #define KFREE(p) \ 340 do { \ 341 printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \ 342 free((p), M_SECA); \ 343 } while (0) 344 #endif 345 346 /* 347 * set parameters into secpolicyindex buffer. 348 * Must allocate secpolicyindex buffer passed to this function. 349 */ 350 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 351 do { \ 352 memset((idx), 0, sizeof(struct secpolicyindex)); \ 353 (idx)->dir = (_dir); \ 354 (idx)->prefs = (ps); \ 355 (idx)->prefd = (pd); \ 356 (idx)->ul_proto = (ulp); \ 357 memcpy(&(idx)->src, (s), ((const struct sockaddr *)(s))->sa_len); \ 358 memcpy(&(idx)->dst, (d), ((const struct sockaddr *)(d))->sa_len); \ 359 } while (0) 360 361 /* 362 * set parameters into secasindex buffer. 363 * Must allocate secasindex buffer before calling this function. 364 */ 365 static int 366 key_setsecasidx (int, int, int, const struct sadb_address *, 367 const struct sadb_address *, struct secasindex *); 368 369 /* key statistics */ 370 struct _keystat { 371 u_long getspi_count; /* the avarage of count to try to get new SPI */ 372 } keystat; 373 374 struct sadb_msghdr { 375 struct sadb_msg *msg; 376 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 377 int extoff[SADB_EXT_MAX + 1]; 378 int extlen[SADB_EXT_MAX + 1]; 379 }; 380 381 static struct secasvar *key_allocsa_policy (const struct secasindex *); 382 static void key_freesp_so (struct secpolicy **); 383 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int); 384 static void key_delsp (struct secpolicy *); 385 static struct secpolicy *key_getsp (const struct secpolicyindex *); 386 static struct secpolicy *key_getspbyid (u_int32_t); 387 static u_int16_t key_newreqid (void); 388 static struct mbuf *key_gather_mbuf (struct mbuf *, 389 const struct sadb_msghdr *, int, int, ...); 390 static int key_spdadd (struct socket *, struct mbuf *, 391 const struct sadb_msghdr *); 392 static u_int32_t key_getnewspid (void); 393 static int key_spddelete (struct socket *, struct mbuf *, 394 const struct sadb_msghdr *); 395 static int key_spddelete2 (struct socket *, struct mbuf *, 396 const struct sadb_msghdr *); 397 static int key_spdget (struct socket *, struct mbuf *, 398 const struct sadb_msghdr *); 399 static int key_spdflush (struct socket *, struct mbuf *, 400 const struct sadb_msghdr *); 401 static int key_spddump (struct socket *, struct mbuf *, 402 const struct sadb_msghdr *); 403 static struct mbuf * key_setspddump (int *errorp, pid_t); 404 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 405 static int key_nat_map (struct socket *, struct mbuf *, 406 const struct sadb_msghdr *); 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 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 428 static struct mbuf *key_setsadbxtype (u_int16_t); 429 static struct mbuf *key_setsadbxfrag (u_int16_t); 430 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 431 static int key_checksalen (const union sockaddr_union *); 432 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 433 u_int32_t, pid_t, u_int16_t); 434 static struct mbuf *key_setsadbsa (struct secasvar *); 435 static struct mbuf *key_setsadbaddr (u_int16_t, 436 const struct sockaddr *, u_int8_t, u_int16_t); 437 #if 0 438 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 439 int, u_int64_t); 440 #endif 441 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 442 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 443 u_int32_t); 444 static void *key_newbuf (const void *, u_int); 445 #ifdef INET6 446 static int key_ismyaddr6 (const struct sockaddr_in6 *); 447 #endif 448 449 static void sysctl_net_keyv2_setup(struct sysctllog **); 450 static void sysctl_net_key_compat_setup(struct sysctllog **); 451 452 /* flags for key_cmpsaidx() */ 453 #define CMP_HEAD 1 /* protocol, addresses. */ 454 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 455 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 456 #define CMP_EXACTLY 4 /* all elements. */ 457 static int key_cmpsaidx 458 (const struct secasindex *, const struct secasindex *, int); 459 460 static int key_sockaddrcmp (const struct sockaddr *, const struct sockaddr *, int); 461 static int key_bbcmp (const void *, const void *, u_int); 462 static u_int16_t key_satype2proto (u_int8_t); 463 static u_int8_t key_proto2satype (u_int16_t); 464 465 static int key_getspi (struct socket *, struct mbuf *, 466 const struct sadb_msghdr *); 467 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 468 const struct secasindex *); 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 static int key_update (struct socket *, struct mbuf *, 475 const struct sadb_msghdr *); 476 #ifdef IPSEC_DOSEQCHECK 477 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 478 #endif 479 static int key_add (struct socket *, struct mbuf *, 480 const struct sadb_msghdr *); 481 static int key_setident (struct secashead *, struct mbuf *, 482 const struct sadb_msghdr *); 483 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 484 const struct sadb_msghdr *); 485 static int key_delete (struct socket *, struct mbuf *, 486 const struct sadb_msghdr *); 487 static int key_get (struct socket *, struct mbuf *, 488 const struct sadb_msghdr *); 489 490 static void key_getcomb_setlifetime (struct sadb_comb *); 491 static struct mbuf *key_getcomb_esp (void); 492 static struct mbuf *key_getcomb_ah (void); 493 static struct mbuf *key_getcomb_ipcomp (void); 494 static struct mbuf *key_getprop (const struct secasindex *); 495 496 static int key_acquire (const struct secasindex *, struct secpolicy *); 497 #ifndef IPSEC_NONBLOCK_ACQUIRE 498 static struct secacq *key_newacq (const struct secasindex *); 499 static struct secacq *key_getacq (const struct secasindex *); 500 static struct secacq *key_getacqbyseq (u_int32_t); 501 #endif 502 static struct secspacq *key_newspacq (const struct secpolicyindex *); 503 static struct secspacq *key_getspacq (const struct secpolicyindex *); 504 static int key_acquire2 (struct socket *, struct mbuf *, 505 const struct sadb_msghdr *); 506 static int key_register (struct socket *, struct mbuf *, 507 const struct sadb_msghdr *); 508 static int key_expire (struct secasvar *); 509 static int key_flush (struct socket *, struct mbuf *, 510 const struct sadb_msghdr *); 511 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 512 int *lenp, pid_t pid); 513 static int key_dump (struct socket *, struct mbuf *, 514 const struct sadb_msghdr *); 515 static int key_promisc (struct socket *, struct mbuf *, 516 const struct sadb_msghdr *); 517 static int key_senderror (struct socket *, struct mbuf *, int); 518 static int key_validate_ext (const struct sadb_ext *, int); 519 static int key_align (struct mbuf *, struct sadb_msghdr *); 520 #if 0 521 static const char *key_getfqdn (void); 522 static const char *key_getuserfqdn (void); 523 #endif 524 static void key_sa_chgstate (struct secasvar *, u_int8_t); 525 static inline void key_sp_dead (struct secpolicy *); 526 static void key_sp_unlink (struct secpolicy *sp); 527 528 static struct mbuf *key_alloc_mbuf (int); 529 struct callout key_timehandler_ch; 530 531 #define SA_ADDREF(p) do { \ 532 (p)->refcnt++; \ 533 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 534 } while (0) 535 #define SA_DELREF(p) do { \ 536 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 537 (p)->refcnt--; \ 538 } while (0) 539 540 #define SP_ADDREF(p) do { \ 541 (p)->refcnt++; \ 542 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 543 } while (0) 544 #define SP_DELREF(p) do { \ 545 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 546 (p)->refcnt--; \ 547 } while (0) 548 549 550 static inline void 551 key_sp_dead(struct secpolicy *sp) 552 { 553 554 /* mark the SP dead */ 555 sp->state = IPSEC_SPSTATE_DEAD; 556 } 557 558 static void 559 key_sp_unlink(struct secpolicy *sp) 560 { 561 562 /* remove from SP index */ 563 if (__LIST_CHAINED(sp)) { 564 LIST_REMOVE(sp, chain); 565 /* Release refcount held just for being on chain */ 566 KEY_FREESP(&sp); 567 } 568 } 569 570 571 /* 572 * Return 0 when there are known to be no SP's for the specified 573 * direction. Otherwise return 1. This is used by IPsec code 574 * to optimize performance. 575 */ 576 int 577 key_havesp(u_int dir) 578 { 579 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 580 LIST_FIRST(&sptree[dir]) != NULL : 1); 581 } 582 583 /* %%% IPsec policy management */ 584 /* 585 * allocating a SP for OUTBOUND or INBOUND packet. 586 * Must call key_freesp() later. 587 * OUT: NULL: not found 588 * others: found and return the pointer. 589 */ 590 struct secpolicy * 591 key_allocsp(const struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 592 { 593 struct secpolicy *sp; 594 int s; 595 596 KASSERT(spidx != NULL); 597 KASSERTMSG(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 598 "invalid direction %u", dir); 599 600 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 601 602 /* get a SP entry */ 603 s = splsoftnet(); /*called from softclock()*/ 604 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 605 printf("*** objects\n"); 606 kdebug_secpolicyindex(spidx); 607 } 608 609 LIST_FOREACH(sp, &sptree[dir], chain) { 610 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 611 printf("*** in SPD\n"); 612 kdebug_secpolicyindex(&sp->spidx); 613 } 614 615 if (sp->state == IPSEC_SPSTATE_DEAD) 616 continue; 617 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 618 goto found; 619 } 620 sp = NULL; 621 found: 622 if (sp) { 623 /* sanity check */ 624 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp"); 625 626 /* found a SPD entry */ 627 sp->lastused = time_uptime; 628 SP_ADDREF(sp); 629 } 630 splx(s); 631 632 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 633 "DP return SP:%p (ID=%u) refcnt %u\n", 634 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 635 return sp; 636 } 637 638 /* 639 * allocating a SP for OUTBOUND or INBOUND packet. 640 * Must call key_freesp() later. 641 * OUT: NULL: not found 642 * others: found and return the pointer. 643 */ 644 struct secpolicy * 645 key_allocsp2(u_int32_t spi, 646 const union sockaddr_union *dst, 647 u_int8_t proto, 648 u_int dir, 649 const char* where, int tag) 650 { 651 struct secpolicy *sp; 652 int s; 653 654 KASSERT(dst != NULL); 655 KASSERTMSG(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 656 "invalid direction %u", dir); 657 658 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 659 660 /* get a SP entry */ 661 s = splsoftnet(); /*called from softclock()*/ 662 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 663 printf("*** objects\n"); 664 printf("spi %u proto %u dir %u\n", spi, proto, dir); 665 kdebug_sockaddr(&dst->sa); 666 } 667 668 LIST_FOREACH(sp, &sptree[dir], chain) { 669 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 670 printf("*** in SPD\n"); 671 kdebug_secpolicyindex(&sp->spidx); 672 } 673 674 if (sp->state == IPSEC_SPSTATE_DEAD) 675 continue; 676 /* compare simple values, then dst address */ 677 if (sp->spidx.ul_proto != proto) 678 continue; 679 /* NB: spi's must exist and match */ 680 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 681 continue; 682 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, PORT_STRICT) == 0) 683 goto found; 684 } 685 sp = NULL; 686 found: 687 if (sp) { 688 /* sanity check */ 689 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2"); 690 691 /* found a SPD entry */ 692 sp->lastused = time_uptime; 693 SP_ADDREF(sp); 694 } 695 splx(s); 696 697 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 698 "DP return SP:%p (ID=%u) refcnt %u\n", 699 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 700 return sp; 701 } 702 703 /* 704 * return a policy that matches this particular inbound packet. 705 * XXX slow 706 */ 707 struct secpolicy * 708 key_gettunnel(const struct sockaddr *osrc, 709 const struct sockaddr *odst, 710 const struct sockaddr *isrc, 711 const struct sockaddr *idst, 712 const char* where, int tag) 713 { 714 struct secpolicy *sp; 715 const int dir = IPSEC_DIR_INBOUND; 716 int s; 717 struct ipsecrequest *r1, *r2, *p; 718 struct secpolicyindex spidx; 719 720 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 721 722 if (isrc->sa_family != idst->sa_family) { 723 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.", 724 isrc->sa_family, idst->sa_family)); 725 sp = NULL; 726 goto done; 727 } 728 729 s = splsoftnet(); /*called from softclock()*/ 730 LIST_FOREACH(sp, &sptree[dir], chain) { 731 if (sp->state == IPSEC_SPSTATE_DEAD) 732 continue; 733 734 r1 = r2 = NULL; 735 for (p = sp->req; p; p = p->next) { 736 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 737 continue; 738 739 r1 = r2; 740 r2 = p; 741 742 if (!r1) { 743 /* here we look at address matches only */ 744 spidx = sp->spidx; 745 if (isrc->sa_len > sizeof(spidx.src) || 746 idst->sa_len > sizeof(spidx.dst)) 747 continue; 748 memcpy(&spidx.src, isrc, isrc->sa_len); 749 memcpy(&spidx.dst, idst, idst->sa_len); 750 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 751 continue; 752 } else { 753 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, PORT_NONE) || 754 key_sockaddrcmp(&r1->saidx.dst.sa, idst, PORT_NONE)) 755 continue; 756 } 757 758 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, PORT_NONE) || 759 key_sockaddrcmp(&r2->saidx.dst.sa, odst, PORT_NONE)) 760 continue; 761 762 goto found; 763 } 764 } 765 sp = NULL; 766 found: 767 if (sp) { 768 sp->lastused = time_uptime; 769 SP_ADDREF(sp); 770 } 771 splx(s); 772 done: 773 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 774 "DP return SP:%p (ID=%u) refcnt %u\n", 775 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 776 return sp; 777 } 778 779 /* 780 * allocating an SA entry for an *OUTBOUND* packet. 781 * checking each request entries in SP, and acquire an SA if need. 782 * OUT: 0: there are valid requests. 783 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 784 */ 785 int 786 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 787 { 788 u_int level; 789 int error; 790 791 KASSERT(isr != NULL); 792 KASSERT(saidx != NULL); 793 KASSERTMSG(saidx->mode == IPSEC_MODE_TRANSPORT || 794 saidx->mode == IPSEC_MODE_TUNNEL, 795 "unexpected policy %u", saidx->mode); 796 797 /* get current level */ 798 level = ipsec_get_reqlevel(isr); 799 800 /* 801 * XXX guard against protocol callbacks from the crypto 802 * thread as they reference ipsecrequest.sav which we 803 * temporarily null out below. Need to rethink how we 804 * handle bundled SA's in the callback thread. 805 */ 806 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 807 #if 0 808 /* 809 * We do allocate new SA only if the state of SA in the holder is 810 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 811 */ 812 if (isr->sav != NULL) { 813 if (isr->sav->sah == NULL) 814 panic("key_checkrequest: sah is null"); 815 if (isr->sav == (struct secasvar *)LIST_FIRST( 816 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 817 KEY_FREESAV(&isr->sav); 818 isr->sav = NULL; 819 } 820 } 821 #else 822 /* 823 * we free any SA stashed in the IPsec request because a different 824 * SA may be involved each time this request is checked, either 825 * because new SAs are being configured, or this request is 826 * associated with an unconnected datagram socket, or this request 827 * is associated with a system default policy. 828 * 829 * The operation may have negative impact to performance. We may 830 * want to check cached SA carefully, rather than picking new SA 831 * every time. 832 */ 833 if (isr->sav != NULL) { 834 KEY_FREESAV(&isr->sav); 835 isr->sav = NULL; 836 } 837 #endif 838 839 /* 840 * new SA allocation if no SA found. 841 * key_allocsa_policy should allocate the oldest SA available. 842 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 843 */ 844 if (isr->sav == NULL) 845 isr->sav = key_allocsa_policy(saidx); 846 847 /* When there is SA. */ 848 if (isr->sav != NULL) { 849 if (isr->sav->state != SADB_SASTATE_MATURE && 850 isr->sav->state != SADB_SASTATE_DYING) 851 return EINVAL; 852 return 0; 853 } 854 855 /* there is no SA */ 856 error = key_acquire(saidx, isr->sp); 857 if (error != 0) { 858 /* XXX What should I do ? */ 859 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " 860 "from key_acquire.\n", error)); 861 return error; 862 } 863 864 if (level != IPSEC_LEVEL_REQUIRE) { 865 /* XXX sigh, the interface to this routine is botched */ 866 KASSERTMSG(isr->sav == NULL, "unexpected SA"); 867 return 0; 868 } else { 869 return ENOENT; 870 } 871 } 872 873 /* 874 * allocating a SA for policy entry from SAD. 875 * NOTE: searching SAD of aliving state. 876 * OUT: NULL: not found. 877 * others: found and return the pointer. 878 */ 879 static struct secasvar * 880 key_allocsa_policy(const struct secasindex *saidx) 881 { 882 struct secashead *sah; 883 struct secasvar *sav; 884 u_int stateidx, state; 885 const u_int *saorder_state_valid; 886 int arraysize; 887 888 LIST_FOREACH(sah, &sahtree, chain) { 889 if (sah->state == SADB_SASTATE_DEAD) 890 continue; 891 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) 892 goto found; 893 } 894 895 return NULL; 896 897 found: 898 899 /* 900 * search a valid state list for outbound packet. 901 * This search order is important. 902 */ 903 if (key_prefered_oldsa) { 904 saorder_state_valid = saorder_state_valid_prefer_old; 905 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 906 } else { 907 saorder_state_valid = saorder_state_valid_prefer_new; 908 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 909 } 910 911 /* search valid state */ 912 for (stateidx = 0; 913 stateidx < arraysize; 914 stateidx++) { 915 916 state = saorder_state_valid[stateidx]; 917 918 sav = key_do_allocsa_policy(sah, state); 919 if (sav != NULL) 920 return sav; 921 } 922 923 return NULL; 924 } 925 926 /* 927 * searching SAD with direction, protocol, mode and state. 928 * called by key_allocsa_policy(). 929 * OUT: 930 * NULL : not found 931 * others : found, pointer to a SA. 932 */ 933 static struct secasvar * 934 key_do_allocsa_policy(struct secashead *sah, u_int state) 935 { 936 struct secasvar *sav, *nextsav, *candidate, *d; 937 938 /* initilize */ 939 candidate = NULL; 940 941 for (sav = LIST_FIRST(&sah->savtree[state]); 942 sav != NULL; 943 sav = nextsav) { 944 945 nextsav = LIST_NEXT(sav, chain); 946 947 /* sanity check */ 948 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy"); 949 950 /* initialize */ 951 if (candidate == NULL) { 952 candidate = sav; 953 continue; 954 } 955 956 /* Which SA is the better ? */ 957 958 /* sanity check 2 */ 959 KASSERT(candidate->lft_c != NULL); 960 KASSERT(sav->lft_c != NULL); 961 962 /* What the best method is to compare ? */ 963 if (key_prefered_oldsa) { 964 if (candidate->lft_c->sadb_lifetime_addtime > 965 sav->lft_c->sadb_lifetime_addtime) { 966 candidate = sav; 967 } 968 continue; 969 /*NOTREACHED*/ 970 } 971 972 /* prefered new sa rather than old sa */ 973 if (candidate->lft_c->sadb_lifetime_addtime < 974 sav->lft_c->sadb_lifetime_addtime) { 975 d = candidate; 976 candidate = sav; 977 } else 978 d = sav; 979 980 /* 981 * prepared to delete the SA when there is more 982 * suitable candidate and the lifetime of the SA is not 983 * permanent. 984 */ 985 if (d->lft_c->sadb_lifetime_addtime != 0) { 986 struct mbuf *m, *result = 0; 987 uint8_t satype; 988 989 key_sa_chgstate(d, SADB_SASTATE_DEAD); 990 991 KASSERT(d->refcnt > 0); 992 993 satype = key_proto2satype(d->sah->saidx.proto); 994 if (satype == 0) 995 goto msgfail; 996 997 m = key_setsadbmsg(SADB_DELETE, 0, 998 satype, 0, 0, d->refcnt - 1); 999 if (!m) 1000 goto msgfail; 1001 result = m; 1002 1003 /* set sadb_address for saidx's. */ 1004 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1005 &d->sah->saidx.src.sa, 1006 d->sah->saidx.src.sa.sa_len << 3, 1007 IPSEC_ULPROTO_ANY); 1008 if (!m) 1009 goto msgfail; 1010 m_cat(result, m); 1011 1012 /* set sadb_address for saidx's. */ 1013 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1014 &d->sah->saidx.src.sa, 1015 d->sah->saidx.src.sa.sa_len << 3, 1016 IPSEC_ULPROTO_ANY); 1017 if (!m) 1018 goto msgfail; 1019 m_cat(result, m); 1020 1021 /* create SA extension */ 1022 m = key_setsadbsa(d); 1023 if (!m) 1024 goto msgfail; 1025 m_cat(result, m); 1026 1027 if (result->m_len < sizeof(struct sadb_msg)) { 1028 result = m_pullup(result, 1029 sizeof(struct sadb_msg)); 1030 if (result == NULL) 1031 goto msgfail; 1032 } 1033 1034 result->m_pkthdr.len = 0; 1035 for (m = result; m; m = m->m_next) 1036 result->m_pkthdr.len += m->m_len; 1037 mtod(result, struct sadb_msg *)->sadb_msg_len = 1038 PFKEY_UNIT64(result->m_pkthdr.len); 1039 1040 key_sendup_mbuf(NULL, result, 1041 KEY_SENDUP_REGISTERED); 1042 result = 0; 1043 msgfail: 1044 if (result) 1045 m_freem(result); 1046 KEY_FREESAV(&d); 1047 } 1048 } 1049 1050 if (candidate) { 1051 SA_ADDREF(candidate); 1052 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1053 "DP cause refcnt++:%d SA:%p\n", 1054 candidate->refcnt, candidate); 1055 } 1056 return candidate; 1057 } 1058 1059 /* 1060 * allocating a usable SA entry for a *INBOUND* packet. 1061 * Must call key_freesav() later. 1062 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1063 * NULL: not found, or error occurred. 1064 * 1065 * In the comparison, no source address is used--for RFC2401 conformance. 1066 * To quote, from section 4.1: 1067 * A security association is uniquely identified by a triple consisting 1068 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1069 * security protocol (AH or ESP) identifier. 1070 * Note that, however, we do need to keep source address in IPsec SA. 1071 * IKE specification and PF_KEY specification do assume that we 1072 * keep source address in IPsec SA. We see a tricky situation here. 1073 * 1074 * sport and dport are used for NAT-T. network order is always used. 1075 */ 1076 struct secasvar * 1077 key_allocsa( 1078 const union sockaddr_union *dst, 1079 u_int proto, 1080 u_int32_t spi, 1081 u_int16_t sport, 1082 u_int16_t dport, 1083 const char* where, int tag) 1084 { 1085 struct secashead *sah; 1086 struct secasvar *sav; 1087 u_int stateidx, state; 1088 const u_int *saorder_state_valid; 1089 int arraysize, chkport; 1090 int s; 1091 1092 int must_check_spi = 1; 1093 int must_check_alg = 0; 1094 u_int16_t cpi = 0; 1095 u_int8_t algo = 0; 1096 1097 if ((sport != 0) && (dport != 0)) 1098 chkport = PORT_STRICT; 1099 else 1100 chkport = PORT_NONE; 1101 1102 KASSERT(dst != NULL); 1103 1104 /* 1105 * XXX IPCOMP case 1106 * We use cpi to define spi here. In the case where cpi <= 1107 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1108 * the real spi. In this case, don't check the spi but check the 1109 * algorithm 1110 */ 1111 1112 if (proto == IPPROTO_IPCOMP) { 1113 u_int32_t tmp; 1114 tmp = ntohl(spi); 1115 cpi = (u_int16_t) tmp; 1116 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1117 algo = (u_int8_t) cpi; 1118 must_check_spi = 0; 1119 must_check_alg = 1; 1120 } 1121 } 1122 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1123 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1124 where, tag, must_check_spi, must_check_alg); 1125 1126 1127 /* 1128 * searching SAD. 1129 * XXX: to be checked internal IP header somewhere. Also when 1130 * IPsec tunnel packet is received. But ESP tunnel mode is 1131 * encrypted so we can't check internal IP header. 1132 */ 1133 s = splsoftnet(); /*called from softclock()*/ 1134 if (key_prefered_oldsa) { 1135 saorder_state_valid = saorder_state_valid_prefer_old; 1136 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1137 } else { 1138 saorder_state_valid = saorder_state_valid_prefer_new; 1139 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1140 } 1141 LIST_FOREACH(sah, &sahtree, chain) { 1142 /* search valid state */ 1143 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1144 state = saorder_state_valid[stateidx]; 1145 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1146 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1147 "try match spi %#x, %#x\n", 1148 ntohl(spi), ntohl(sav->spi)); 1149 /* sanity check */ 1150 KEY_CHKSASTATE(sav->state, state, "key_allocsav"); 1151 /* do not return entries w/ unusable state */ 1152 if (sav->state != SADB_SASTATE_MATURE && 1153 sav->state != SADB_SASTATE_DYING) { 1154 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1155 "bad state %d\n", sav->state); 1156 continue; 1157 } 1158 if (proto != sav->sah->saidx.proto) { 1159 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1160 "proto fail %d != %d\n", 1161 proto, sav->sah->saidx.proto); 1162 continue; 1163 } 1164 if (must_check_spi && spi != sav->spi) { 1165 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1166 "spi fail %#x != %#x\n", 1167 ntohl(spi), ntohl(sav->spi)); 1168 continue; 1169 } 1170 /* XXX only on the ipcomp case */ 1171 if (must_check_alg && algo != sav->alg_comp) { 1172 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1173 "algo fail %d != %d\n", 1174 algo, sav->alg_comp); 1175 continue; 1176 } 1177 1178 #if 0 /* don't check src */ 1179 /* Fix port in src->sa */ 1180 1181 /* check src address */ 1182 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE) != 0) 1183 continue; 1184 #endif 1185 /* fix port of dst address XXX*/ 1186 key_porttosaddr(__UNCONST(dst), dport); 1187 /* check dst address */ 1188 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1189 continue; 1190 SA_ADDREF(sav); 1191 goto done; 1192 } 1193 } 1194 } 1195 sav = NULL; 1196 done: 1197 splx(s); 1198 1199 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1200 "DP return SA:%p; refcnt %u\n", sav, sav ? sav->refcnt : 0); 1201 return sav; 1202 } 1203 1204 /* 1205 * Must be called after calling key_allocsp(). 1206 * For both the packet without socket and key_freeso(). 1207 */ 1208 void 1209 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1210 { 1211 struct secpolicy *sp = *spp; 1212 1213 KASSERT(sp != NULL); 1214 1215 SP_DELREF(sp); 1216 1217 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1218 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1219 sp, sp->id, where, tag, sp->refcnt); 1220 1221 if (sp->refcnt == 0) { 1222 *spp = NULL; 1223 key_delsp(sp); 1224 } 1225 } 1226 1227 /* 1228 * Must be called after calling key_allocsp(). 1229 * For the packet with socket. 1230 */ 1231 void 1232 key_freeso(struct socket *so) 1233 { 1234 /* sanity check */ 1235 KASSERT(so != NULL); 1236 1237 switch (so->so_proto->pr_domain->dom_family) { 1238 #ifdef INET 1239 case PF_INET: 1240 { 1241 struct inpcb *pcb = sotoinpcb(so); 1242 1243 /* Does it have a PCB ? */ 1244 if (pcb == NULL) 1245 return; 1246 1247 struct inpcbpolicy *sp = pcb->inp_sp; 1248 key_freesp_so(&sp->sp_in); 1249 key_freesp_so(&sp->sp_out); 1250 } 1251 break; 1252 #endif 1253 #ifdef INET6 1254 case PF_INET6: 1255 { 1256 #ifdef HAVE_NRL_INPCB 1257 struct inpcb *pcb = sotoinpcb(so); 1258 struct inpcbpolicy *sp = pcb->inp_sp; 1259 1260 /* Does it have a PCB ? */ 1261 if (pcb == NULL) 1262 return; 1263 key_freesp_so(&sp->sp_in); 1264 key_freesp_so(&sp->sp_out); 1265 #else 1266 struct in6pcb *pcb = sotoin6pcb(so); 1267 1268 /* Does it have a PCB ? */ 1269 if (pcb == NULL) 1270 return; 1271 key_freesp_so(&pcb->in6p_sp->sp_in); 1272 key_freesp_so(&pcb->in6p_sp->sp_out); 1273 #endif 1274 } 1275 break; 1276 #endif /* INET6 */ 1277 default: 1278 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1279 so->so_proto->pr_domain->dom_family)); 1280 return; 1281 } 1282 } 1283 1284 static void 1285 key_freesp_so(struct secpolicy **sp) 1286 { 1287 1288 KASSERT(sp != NULL); 1289 KASSERT(*sp != NULL); 1290 1291 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1292 (*sp)->policy == IPSEC_POLICY_BYPASS) 1293 return; 1294 1295 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1296 "invalid policy %u", (*sp)->policy); 1297 KEY_FREESP(sp); 1298 } 1299 1300 /* 1301 * Must be called after calling key_allocsa(). 1302 * This function is called by key_freesp() to free some SA allocated 1303 * for a policy. 1304 */ 1305 void 1306 key_freesav(struct secasvar **psav, const char* where, int tag) 1307 { 1308 struct secasvar *sav = *psav; 1309 1310 KASSERT(sav != NULL); 1311 1312 SA_DELREF(sav); 1313 1314 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1315 "DP SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1316 sav, (u_long)ntohl(sav->spi), where, tag, sav->refcnt); 1317 1318 if (sav->refcnt == 0) { 1319 *psav = NULL; 1320 key_delsav(sav); 1321 } 1322 } 1323 1324 /* %%% SPD management */ 1325 /* 1326 * free security policy entry. 1327 */ 1328 static void 1329 key_delsp(struct secpolicy *sp) 1330 { 1331 int s; 1332 1333 KASSERT(sp != NULL); 1334 1335 key_sp_dead(sp); 1336 1337 KASSERTMSG(sp->refcnt == 0, 1338 "SP with references deleted (refcnt %u)", sp->refcnt); 1339 1340 s = splsoftnet(); /*called from softclock()*/ 1341 1342 { 1343 struct ipsecrequest *isr = sp->req, *nextisr; 1344 1345 while (isr != NULL) { 1346 if (isr->sav != NULL) { 1347 KEY_FREESAV(&isr->sav); 1348 isr->sav = NULL; 1349 } 1350 1351 nextisr = isr->next; 1352 KFREE(isr); 1353 isr = nextisr; 1354 } 1355 } 1356 1357 KFREE(sp); 1358 1359 splx(s); 1360 } 1361 1362 /* 1363 * search SPD 1364 * OUT: NULL : not found 1365 * others : found, pointer to a SP. 1366 */ 1367 static struct secpolicy * 1368 key_getsp(const struct secpolicyindex *spidx) 1369 { 1370 struct secpolicy *sp; 1371 1372 KASSERT(spidx != NULL); 1373 1374 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1375 if (sp->state == IPSEC_SPSTATE_DEAD) 1376 continue; 1377 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1378 SP_ADDREF(sp); 1379 return sp; 1380 } 1381 } 1382 1383 return NULL; 1384 } 1385 1386 /* 1387 * get SP by index. 1388 * OUT: NULL : not found 1389 * others : found, pointer to a SP. 1390 */ 1391 static struct secpolicy * 1392 key_getspbyid(u_int32_t id) 1393 { 1394 struct secpolicy *sp; 1395 1396 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1397 if (sp->state == IPSEC_SPSTATE_DEAD) 1398 continue; 1399 if (sp->id == id) { 1400 SP_ADDREF(sp); 1401 return sp; 1402 } 1403 } 1404 1405 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1406 if (sp->state == IPSEC_SPSTATE_DEAD) 1407 continue; 1408 if (sp->id == id) { 1409 SP_ADDREF(sp); 1410 return sp; 1411 } 1412 } 1413 1414 return NULL; 1415 } 1416 1417 struct secpolicy * 1418 key_newsp(const char* where, int tag) 1419 { 1420 struct secpolicy *newsp = NULL; 1421 1422 newsp = (struct secpolicy *) 1423 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); 1424 if (newsp) { 1425 newsp->refcnt = 1; 1426 newsp->req = NULL; 1427 } 1428 1429 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1430 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1431 return newsp; 1432 } 1433 1434 /* 1435 * create secpolicy structure from sadb_x_policy structure. 1436 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1437 * so must be set properly later. 1438 */ 1439 struct secpolicy * 1440 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1441 { 1442 struct secpolicy *newsp; 1443 1444 KASSERT(xpl0 != NULL); 1445 KASSERT(len >= sizeof(*xpl0)); 1446 1447 if (len != PFKEY_EXTLEN(xpl0)) { 1448 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1449 *error = EINVAL; 1450 return NULL; 1451 } 1452 1453 if ((newsp = KEY_NEWSP()) == NULL) { 1454 *error = ENOBUFS; 1455 return NULL; 1456 } 1457 1458 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1459 newsp->policy = xpl0->sadb_x_policy_type; 1460 1461 /* check policy */ 1462 switch (xpl0->sadb_x_policy_type) { 1463 case IPSEC_POLICY_DISCARD: 1464 case IPSEC_POLICY_NONE: 1465 case IPSEC_POLICY_ENTRUST: 1466 case IPSEC_POLICY_BYPASS: 1467 newsp->req = NULL; 1468 *error = 0; 1469 return newsp; 1470 1471 case IPSEC_POLICY_IPSEC: 1472 /* Continued */ 1473 break; 1474 default: 1475 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1476 KEY_FREESP(&newsp); 1477 *error = EINVAL; 1478 return NULL; 1479 } 1480 1481 /* IPSEC_POLICY_IPSEC */ 1482 { 1483 int tlen; 1484 const struct sadb_x_ipsecrequest *xisr; 1485 uint16_t xisr_reqid; 1486 struct ipsecrequest **p_isr = &newsp->req; 1487 1488 /* validity check */ 1489 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1490 ipseclog((LOG_DEBUG, 1491 "key_msg2sp: Invalid msg length.\n")); 1492 KEY_FREESP(&newsp); 1493 *error = EINVAL; 1494 return NULL; 1495 } 1496 1497 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1498 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1499 1500 while (tlen > 0) { 1501 /* length check */ 1502 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1503 ipseclog((LOG_DEBUG, "key_msg2sp: " 1504 "invalid ipsecrequest length.\n")); 1505 KEY_FREESP(&newsp); 1506 *error = EINVAL; 1507 return NULL; 1508 } 1509 1510 /* allocate request buffer */ 1511 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); 1512 if ((*p_isr) == NULL) { 1513 ipseclog((LOG_DEBUG, 1514 "key_msg2sp: No more memory.\n")); 1515 KEY_FREESP(&newsp); 1516 *error = ENOBUFS; 1517 return NULL; 1518 } 1519 memset(*p_isr, 0, sizeof(**p_isr)); 1520 1521 /* set values */ 1522 (*p_isr)->next = NULL; 1523 1524 switch (xisr->sadb_x_ipsecrequest_proto) { 1525 case IPPROTO_ESP: 1526 case IPPROTO_AH: 1527 case IPPROTO_IPCOMP: 1528 break; 1529 default: 1530 ipseclog((LOG_DEBUG, 1531 "key_msg2sp: invalid proto type=%u\n", 1532 xisr->sadb_x_ipsecrequest_proto)); 1533 KEY_FREESP(&newsp); 1534 *error = EPROTONOSUPPORT; 1535 return NULL; 1536 } 1537 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1538 1539 switch (xisr->sadb_x_ipsecrequest_mode) { 1540 case IPSEC_MODE_TRANSPORT: 1541 case IPSEC_MODE_TUNNEL: 1542 break; 1543 case IPSEC_MODE_ANY: 1544 default: 1545 ipseclog((LOG_DEBUG, 1546 "key_msg2sp: invalid mode=%u\n", 1547 xisr->sadb_x_ipsecrequest_mode)); 1548 KEY_FREESP(&newsp); 1549 *error = EINVAL; 1550 return NULL; 1551 } 1552 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1553 1554 switch (xisr->sadb_x_ipsecrequest_level) { 1555 case IPSEC_LEVEL_DEFAULT: 1556 case IPSEC_LEVEL_USE: 1557 case IPSEC_LEVEL_REQUIRE: 1558 break; 1559 case IPSEC_LEVEL_UNIQUE: 1560 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1561 /* validity check */ 1562 /* 1563 * If range violation of reqid, kernel will 1564 * update it, don't refuse it. 1565 */ 1566 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1567 ipseclog((LOG_DEBUG, 1568 "key_msg2sp: reqid=%d range " 1569 "violation, updated by kernel.\n", 1570 xisr_reqid)); 1571 xisr_reqid = 0; 1572 } 1573 1574 /* allocate new reqid id if reqid is zero. */ 1575 if (xisr_reqid == 0) { 1576 u_int16_t reqid; 1577 if ((reqid = key_newreqid()) == 0) { 1578 KEY_FREESP(&newsp); 1579 *error = ENOBUFS; 1580 return NULL; 1581 } 1582 (*p_isr)->saidx.reqid = reqid; 1583 } else { 1584 /* set it for manual keying. */ 1585 (*p_isr)->saidx.reqid = xisr_reqid; 1586 } 1587 break; 1588 1589 default: 1590 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1591 xisr->sadb_x_ipsecrequest_level)); 1592 KEY_FREESP(&newsp); 1593 *error = EINVAL; 1594 return NULL; 1595 } 1596 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1597 1598 /* set IP addresses if there */ 1599 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1600 const struct sockaddr *paddr; 1601 1602 paddr = (const struct sockaddr *)(xisr + 1); 1603 1604 /* validity check */ 1605 if (paddr->sa_len 1606 > sizeof((*p_isr)->saidx.src)) { 1607 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1608 "address length.\n")); 1609 KEY_FREESP(&newsp); 1610 *error = EINVAL; 1611 return NULL; 1612 } 1613 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1614 1615 paddr = (const struct sockaddr *)((const char *)paddr 1616 + paddr->sa_len); 1617 1618 /* validity check */ 1619 if (paddr->sa_len 1620 > sizeof((*p_isr)->saidx.dst)) { 1621 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1622 "address length.\n")); 1623 KEY_FREESP(&newsp); 1624 *error = EINVAL; 1625 return NULL; 1626 } 1627 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1628 } 1629 1630 (*p_isr)->sav = NULL; 1631 (*p_isr)->sp = newsp; 1632 1633 /* initialization for the next. */ 1634 p_isr = &(*p_isr)->next; 1635 tlen -= xisr->sadb_x_ipsecrequest_len; 1636 1637 /* validity check */ 1638 if (tlen < 0) { 1639 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1640 KEY_FREESP(&newsp); 1641 *error = EINVAL; 1642 return NULL; 1643 } 1644 1645 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr 1646 + xisr->sadb_x_ipsecrequest_len); 1647 } 1648 } 1649 1650 *error = 0; 1651 return newsp; 1652 } 1653 1654 static u_int16_t 1655 key_newreqid(void) 1656 { 1657 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1658 1659 auto_reqid = (auto_reqid == 0xffff 1660 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1661 1662 /* XXX should be unique check */ 1663 1664 return auto_reqid; 1665 } 1666 1667 /* 1668 * copy secpolicy struct to sadb_x_policy structure indicated. 1669 */ 1670 struct mbuf * 1671 key_sp2msg(const struct secpolicy *sp) 1672 { 1673 struct sadb_x_policy *xpl; 1674 int tlen; 1675 char *p; 1676 struct mbuf *m; 1677 1678 KASSERT(sp != NULL); 1679 1680 tlen = key_getspreqmsglen(sp); 1681 1682 m = key_alloc_mbuf(tlen); 1683 if (!m || m->m_next) { /*XXX*/ 1684 if (m) 1685 m_freem(m); 1686 return NULL; 1687 } 1688 1689 m->m_len = tlen; 1690 m->m_next = NULL; 1691 xpl = mtod(m, struct sadb_x_policy *); 1692 memset(xpl, 0, tlen); 1693 1694 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1695 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1696 xpl->sadb_x_policy_type = sp->policy; 1697 xpl->sadb_x_policy_dir = sp->spidx.dir; 1698 xpl->sadb_x_policy_id = sp->id; 1699 p = (char *)xpl + sizeof(*xpl); 1700 1701 /* if is the policy for ipsec ? */ 1702 if (sp->policy == IPSEC_POLICY_IPSEC) { 1703 struct sadb_x_ipsecrequest *xisr; 1704 struct ipsecrequest *isr; 1705 1706 for (isr = sp->req; isr != NULL; isr = isr->next) { 1707 1708 xisr = (struct sadb_x_ipsecrequest *)p; 1709 1710 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1711 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1712 xisr->sadb_x_ipsecrequest_level = isr->level; 1713 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1714 1715 p += sizeof(*xisr); 1716 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1717 p += isr->saidx.src.sa.sa_len; 1718 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1719 p += isr->saidx.src.sa.sa_len; 1720 1721 xisr->sadb_x_ipsecrequest_len = 1722 PFKEY_ALIGN8(sizeof(*xisr) 1723 + isr->saidx.src.sa.sa_len 1724 + isr->saidx.dst.sa.sa_len); 1725 } 1726 } 1727 1728 return m; 1729 } 1730 1731 /* m will not be freed nor modified */ 1732 static struct mbuf * 1733 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1734 int ndeep, int nitem, ...) 1735 { 1736 va_list ap; 1737 int idx; 1738 int i; 1739 struct mbuf *result = NULL, *n; 1740 int len; 1741 1742 KASSERT(m != NULL); 1743 KASSERT(mhp != NULL); 1744 1745 va_start(ap, nitem); 1746 for (i = 0; i < nitem; i++) { 1747 idx = va_arg(ap, int); 1748 if (idx < 0 || idx > SADB_EXT_MAX) 1749 goto fail; 1750 /* don't attempt to pull empty extension */ 1751 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1752 continue; 1753 if (idx != SADB_EXT_RESERVED && 1754 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1755 continue; 1756 1757 if (idx == SADB_EXT_RESERVED) { 1758 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 1759 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1760 MGETHDR(n, M_DONTWAIT, MT_DATA); 1761 if (!n) 1762 goto fail; 1763 n->m_len = len; 1764 n->m_next = NULL; 1765 m_copydata(m, 0, sizeof(struct sadb_msg), 1766 mtod(n, void *)); 1767 } else if (i < ndeep) { 1768 len = mhp->extlen[idx]; 1769 n = key_alloc_mbuf(len); 1770 if (!n || n->m_next) { /*XXX*/ 1771 if (n) 1772 m_freem(n); 1773 goto fail; 1774 } 1775 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1776 mtod(n, void *)); 1777 } else { 1778 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1779 M_DONTWAIT); 1780 } 1781 if (n == NULL) 1782 goto fail; 1783 1784 if (result) 1785 m_cat(result, n); 1786 else 1787 result = n; 1788 } 1789 va_end(ap); 1790 1791 if (result && (result->m_flags & M_PKTHDR) != 0) { 1792 result->m_pkthdr.len = 0; 1793 for (n = result; n; n = n->m_next) 1794 result->m_pkthdr.len += n->m_len; 1795 } 1796 1797 return result; 1798 1799 fail: 1800 va_end(ap); 1801 m_freem(result); 1802 return NULL; 1803 } 1804 1805 /* 1806 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1807 * add an entry to SP database, when received 1808 * <base, address(SD), (lifetime(H),) policy> 1809 * from the user(?). 1810 * Adding to SP database, 1811 * and send 1812 * <base, address(SD), (lifetime(H),) policy> 1813 * to the socket which was send. 1814 * 1815 * SPDADD set a unique policy entry. 1816 * SPDSETIDX like SPDADD without a part of policy requests. 1817 * SPDUPDATE replace a unique policy entry. 1818 * 1819 * m will always be freed. 1820 */ 1821 static int 1822 key_spdadd(struct socket *so, struct mbuf *m, 1823 const struct sadb_msghdr *mhp) 1824 { 1825 const struct sadb_address *src0, *dst0; 1826 const struct sadb_x_policy *xpl0; 1827 struct sadb_x_policy *xpl; 1828 const struct sadb_lifetime *lft = NULL; 1829 struct secpolicyindex spidx; 1830 struct secpolicy *newsp; 1831 int error; 1832 1833 KASSERT(so != NULL); 1834 KASSERT(m != NULL); 1835 KASSERT(mhp != NULL); 1836 KASSERT(mhp->msg != NULL); 1837 1838 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1839 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1840 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1841 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1842 return key_senderror(so, m, EINVAL); 1843 } 1844 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1845 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1846 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1847 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1848 return key_senderror(so, m, EINVAL); 1849 } 1850 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1851 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1852 < sizeof(struct sadb_lifetime)) { 1853 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1854 return key_senderror(so, m, EINVAL); 1855 } 1856 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1857 } 1858 1859 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1860 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1861 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1862 1863 /* make secindex */ 1864 /* XXX boundary check against sa_len */ 1865 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1866 src0 + 1, 1867 dst0 + 1, 1868 src0->sadb_address_prefixlen, 1869 dst0->sadb_address_prefixlen, 1870 src0->sadb_address_proto, 1871 &spidx); 1872 1873 /* checking the direciton. */ 1874 switch (xpl0->sadb_x_policy_dir) { 1875 case IPSEC_DIR_INBOUND: 1876 case IPSEC_DIR_OUTBOUND: 1877 break; 1878 default: 1879 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1880 mhp->msg->sadb_msg_errno = EINVAL; 1881 return 0; 1882 } 1883 1884 /* check policy */ 1885 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1886 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1887 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1888 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1889 return key_senderror(so, m, EINVAL); 1890 } 1891 1892 /* policy requests are mandatory when action is ipsec. */ 1893 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1894 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1895 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1896 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1897 return key_senderror(so, m, EINVAL); 1898 } 1899 1900 /* 1901 * checking there is SP already or not. 1902 * SPDUPDATE doesn't depend on whether there is a SP or not. 1903 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1904 * then error. 1905 */ 1906 newsp = key_getsp(&spidx); 1907 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1908 if (newsp) { 1909 key_sp_dead(newsp); 1910 key_sp_unlink(newsp); /* XXX jrs ordering */ 1911 KEY_FREESP(&newsp); 1912 newsp = NULL; 1913 } 1914 } else { 1915 if (newsp != NULL) { 1916 KEY_FREESP(&newsp); 1917 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1918 return key_senderror(so, m, EEXIST); 1919 } 1920 } 1921 1922 /* allocation new SP entry */ 1923 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1924 return key_senderror(so, m, error); 1925 } 1926 1927 if ((newsp->id = key_getnewspid()) == 0) { 1928 KFREE(newsp); 1929 return key_senderror(so, m, ENOBUFS); 1930 } 1931 1932 /* XXX boundary check against sa_len */ 1933 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1934 src0 + 1, 1935 dst0 + 1, 1936 src0->sadb_address_prefixlen, 1937 dst0->sadb_address_prefixlen, 1938 src0->sadb_address_proto, 1939 &newsp->spidx); 1940 1941 /* sanity check on addr pair */ 1942 if (((const struct sockaddr *)(src0 + 1))->sa_family != 1943 ((const struct sockaddr *)(dst0+ 1))->sa_family) { 1944 KFREE(newsp); 1945 return key_senderror(so, m, EINVAL); 1946 } 1947 if (((const struct sockaddr *)(src0 + 1))->sa_len != 1948 ((const struct sockaddr *)(dst0+ 1))->sa_len) { 1949 KFREE(newsp); 1950 return key_senderror(so, m, EINVAL); 1951 } 1952 1953 newsp->created = time_uptime; 1954 newsp->lastused = newsp->created; 1955 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1956 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1957 1958 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1959 newsp->state = IPSEC_SPSTATE_ALIVE; 1960 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1961 1962 /* delete the entry in spacqtree */ 1963 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1964 struct secspacq *spacq; 1965 if ((spacq = key_getspacq(&spidx)) != NULL) { 1966 /* reset counter in order to deletion by timehandler. */ 1967 spacq->created = time_uptime; 1968 spacq->count = 0; 1969 } 1970 } 1971 1972 /* Invalidate all cached SPD pointers in the PCBs. */ 1973 ipsec_invalpcbcacheall(); 1974 1975 #if defined(GATEWAY) 1976 /* Invalidate the ipflow cache, as well. */ 1977 ipflow_invalidate_all(0); 1978 #ifdef INET6 1979 if (in6_present) 1980 ip6flow_invalidate_all(0); 1981 #endif /* INET6 */ 1982 #endif /* GATEWAY */ 1983 1984 { 1985 struct mbuf *n, *mpolicy; 1986 struct sadb_msg *newmsg; 1987 int off; 1988 1989 /* create new sadb_msg to reply. */ 1990 if (lft) { 1991 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1992 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1993 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1994 } else { 1995 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1996 SADB_X_EXT_POLICY, 1997 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1998 } 1999 if (!n) 2000 return key_senderror(so, m, ENOBUFS); 2001 2002 if (n->m_len < sizeof(*newmsg)) { 2003 n = m_pullup(n, sizeof(*newmsg)); 2004 if (!n) 2005 return key_senderror(so, m, ENOBUFS); 2006 } 2007 newmsg = mtod(n, struct sadb_msg *); 2008 newmsg->sadb_msg_errno = 0; 2009 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2010 2011 off = 0; 2012 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2013 sizeof(*xpl), &off); 2014 if (mpolicy == NULL) { 2015 /* n is already freed */ 2016 return key_senderror(so, m, ENOBUFS); 2017 } 2018 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2019 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2020 m_freem(n); 2021 return key_senderror(so, m, EINVAL); 2022 } 2023 xpl->sadb_x_policy_id = newsp->id; 2024 2025 m_freem(m); 2026 key_update_used(); 2027 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2028 } 2029 } 2030 2031 /* 2032 * get new policy id. 2033 * OUT: 2034 * 0: failure. 2035 * others: success. 2036 */ 2037 static u_int32_t 2038 key_getnewspid(void) 2039 { 2040 u_int32_t newid = 0; 2041 int count = key_spi_trycnt; /* XXX */ 2042 struct secpolicy *sp; 2043 2044 /* when requesting to allocate spi ranged */ 2045 while (count--) { 2046 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2047 2048 if ((sp = key_getspbyid(newid)) == NULL) 2049 break; 2050 2051 KEY_FREESP(&sp); 2052 } 2053 2054 if (count == 0 || newid == 0) { 2055 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2056 return 0; 2057 } 2058 2059 return newid; 2060 } 2061 2062 /* 2063 * SADB_SPDDELETE processing 2064 * receive 2065 * <base, address(SD), policy(*)> 2066 * from the user(?), and set SADB_SASTATE_DEAD, 2067 * and send, 2068 * <base, address(SD), policy(*)> 2069 * to the ikmpd. 2070 * policy(*) including direction of policy. 2071 * 2072 * m will always be freed. 2073 */ 2074 static int 2075 key_spddelete(struct socket *so, struct mbuf *m, 2076 const struct sadb_msghdr *mhp) 2077 { 2078 struct sadb_address *src0, *dst0; 2079 struct sadb_x_policy *xpl0; 2080 struct secpolicyindex spidx; 2081 struct secpolicy *sp; 2082 2083 KASSERT(so != NULL); 2084 KASSERT(m != NULL); 2085 KASSERT(mhp != NULL); 2086 KASSERT(mhp->msg != NULL); 2087 2088 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2089 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2090 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2091 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2092 return key_senderror(so, m, EINVAL); 2093 } 2094 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2095 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2096 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2097 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2098 return key_senderror(so, m, EINVAL); 2099 } 2100 2101 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2102 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2103 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2104 2105 /* make secindex */ 2106 /* XXX boundary check against sa_len */ 2107 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2108 src0 + 1, 2109 dst0 + 1, 2110 src0->sadb_address_prefixlen, 2111 dst0->sadb_address_prefixlen, 2112 src0->sadb_address_proto, 2113 &spidx); 2114 2115 /* checking the direciton. */ 2116 switch (xpl0->sadb_x_policy_dir) { 2117 case IPSEC_DIR_INBOUND: 2118 case IPSEC_DIR_OUTBOUND: 2119 break; 2120 default: 2121 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2122 return key_senderror(so, m, EINVAL); 2123 } 2124 2125 /* Is there SP in SPD ? */ 2126 if ((sp = key_getsp(&spidx)) == NULL) { 2127 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2128 return key_senderror(so, m, EINVAL); 2129 } 2130 2131 /* save policy id to buffer to be returned. */ 2132 xpl0->sadb_x_policy_id = sp->id; 2133 2134 key_sp_dead(sp); 2135 key_sp_unlink(sp); /* XXX jrs ordering */ 2136 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2137 2138 /* Invalidate all cached SPD pointers in the PCBs. */ 2139 ipsec_invalpcbcacheall(); 2140 2141 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2142 2143 { 2144 struct mbuf *n; 2145 struct sadb_msg *newmsg; 2146 2147 /* create new sadb_msg to reply. */ 2148 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2149 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2150 if (!n) 2151 return key_senderror(so, m, ENOBUFS); 2152 2153 newmsg = mtod(n, struct sadb_msg *); 2154 newmsg->sadb_msg_errno = 0; 2155 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2156 2157 m_freem(m); 2158 key_update_used(); 2159 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2160 } 2161 } 2162 2163 /* 2164 * SADB_SPDDELETE2 processing 2165 * receive 2166 * <base, policy(*)> 2167 * from the user(?), and set SADB_SASTATE_DEAD, 2168 * and send, 2169 * <base, policy(*)> 2170 * to the ikmpd. 2171 * policy(*) including direction of policy. 2172 * 2173 * m will always be freed. 2174 */ 2175 static int 2176 key_spddelete2(struct socket *so, struct mbuf *m, 2177 const struct sadb_msghdr *mhp) 2178 { 2179 u_int32_t id; 2180 struct secpolicy *sp; 2181 2182 KASSERT(so != NULL); 2183 KASSERT(m != NULL); 2184 KASSERT(mhp != NULL); 2185 KASSERT(mhp->msg != NULL); 2186 2187 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2188 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2189 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2190 key_senderror(so, m, EINVAL); 2191 return 0; 2192 } 2193 2194 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2195 2196 /* Is there SP in SPD ? */ 2197 if ((sp = key_getspbyid(id)) == NULL) { 2198 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2199 return key_senderror(so, m, EINVAL); 2200 } 2201 2202 key_sp_dead(sp); 2203 key_sp_unlink(sp); /* XXX jrs ordering */ 2204 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2205 sp = NULL; 2206 2207 /* Invalidate all cached SPD pointers in the PCBs. */ 2208 ipsec_invalpcbcacheall(); 2209 2210 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2211 2212 { 2213 struct mbuf *n, *nn; 2214 struct sadb_msg *newmsg; 2215 int off, len; 2216 2217 /* create new sadb_msg to reply. */ 2218 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2219 2220 if (len > MCLBYTES) 2221 return key_senderror(so, m, ENOBUFS); 2222 MGETHDR(n, M_DONTWAIT, MT_DATA); 2223 if (n && len > MHLEN) { 2224 MCLGET(n, M_DONTWAIT); 2225 if ((n->m_flags & M_EXT) == 0) { 2226 m_freem(n); 2227 n = NULL; 2228 } 2229 } 2230 if (!n) 2231 return key_senderror(so, m, ENOBUFS); 2232 2233 n->m_len = len; 2234 n->m_next = NULL; 2235 off = 0; 2236 2237 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2238 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2239 2240 KASSERTMSG(off == len, "length inconsistency"); 2241 2242 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2243 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2244 if (!n->m_next) { 2245 m_freem(n); 2246 return key_senderror(so, m, ENOBUFS); 2247 } 2248 2249 n->m_pkthdr.len = 0; 2250 for (nn = n; nn; nn = nn->m_next) 2251 n->m_pkthdr.len += nn->m_len; 2252 2253 newmsg = mtod(n, struct sadb_msg *); 2254 newmsg->sadb_msg_errno = 0; 2255 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2256 2257 m_freem(m); 2258 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2259 } 2260 } 2261 2262 /* 2263 * SADB_X_GET processing 2264 * receive 2265 * <base, policy(*)> 2266 * from the user(?), 2267 * and send, 2268 * <base, address(SD), policy> 2269 * to the ikmpd. 2270 * policy(*) including direction of policy. 2271 * 2272 * m will always be freed. 2273 */ 2274 static int 2275 key_spdget(struct socket *so, struct mbuf *m, 2276 const struct sadb_msghdr *mhp) 2277 { 2278 u_int32_t id; 2279 struct secpolicy *sp; 2280 struct mbuf *n; 2281 2282 KASSERT(so != NULL); 2283 KASSERT(m != NULL); 2284 KASSERT(mhp != NULL); 2285 KASSERT(mhp->msg != NULL); 2286 2287 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2288 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2289 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2290 return key_senderror(so, m, EINVAL); 2291 } 2292 2293 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2294 2295 /* Is there SP in SPD ? */ 2296 if ((sp = key_getspbyid(id)) == NULL) { 2297 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2298 return key_senderror(so, m, ENOENT); 2299 } 2300 2301 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2302 mhp->msg->sadb_msg_pid); 2303 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2304 if (n != NULL) { 2305 m_freem(m); 2306 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2307 } else 2308 return key_senderror(so, m, ENOBUFS); 2309 } 2310 2311 /* 2312 * SADB_X_SPDACQUIRE processing. 2313 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2314 * send 2315 * <base, policy(*)> 2316 * to KMD, and expect to receive 2317 * <base> with SADB_X_SPDACQUIRE if error occurred, 2318 * or 2319 * <base, policy> 2320 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2321 * policy(*) is without policy requests. 2322 * 2323 * 0 : succeed 2324 * others: error number 2325 */ 2326 int 2327 key_spdacquire(const struct secpolicy *sp) 2328 { 2329 struct mbuf *result = NULL, *m; 2330 struct secspacq *newspacq; 2331 int error; 2332 2333 KASSERT(sp != NULL); 2334 KASSERTMSG(sp->req == NULL, "called but there is request"); 2335 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2336 "policy mismathed. IPsec is expected"); 2337 2338 /* Get an entry to check whether sent message or not. */ 2339 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2340 if (key_blockacq_count < newspacq->count) { 2341 /* reset counter and do send message. */ 2342 newspacq->count = 0; 2343 } else { 2344 /* increment counter and do nothing. */ 2345 newspacq->count++; 2346 return 0; 2347 } 2348 } else { 2349 /* make new entry for blocking to send SADB_ACQUIRE. */ 2350 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2351 return ENOBUFS; 2352 2353 /* add to acqtree */ 2354 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2355 } 2356 2357 /* create new sadb_msg to reply. */ 2358 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2359 if (!m) { 2360 error = ENOBUFS; 2361 goto fail; 2362 } 2363 result = m; 2364 2365 result->m_pkthdr.len = 0; 2366 for (m = result; m; m = m->m_next) 2367 result->m_pkthdr.len += m->m_len; 2368 2369 mtod(result, struct sadb_msg *)->sadb_msg_len = 2370 PFKEY_UNIT64(result->m_pkthdr.len); 2371 2372 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2373 2374 fail: 2375 if (result) 2376 m_freem(result); 2377 return error; 2378 } 2379 2380 /* 2381 * SADB_SPDFLUSH processing 2382 * receive 2383 * <base> 2384 * from the user, and free all entries in secpctree. 2385 * and send, 2386 * <base> 2387 * to the user. 2388 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2389 * 2390 * m will always be freed. 2391 */ 2392 static int 2393 key_spdflush(struct socket *so, struct mbuf *m, 2394 const struct sadb_msghdr *mhp) 2395 { 2396 struct sadb_msg *newmsg; 2397 struct secpolicy *sp; 2398 u_int dir; 2399 2400 KASSERT(so != NULL); 2401 KASSERT(m != NULL); 2402 KASSERT(mhp != NULL); 2403 KASSERT(mhp->msg != NULL); 2404 2405 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2406 return key_senderror(so, m, EINVAL); 2407 2408 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2409 struct secpolicy * nextsp; 2410 for (sp = LIST_FIRST(&sptree[dir]); 2411 sp != NULL; 2412 sp = nextsp) { 2413 2414 nextsp = LIST_NEXT(sp, chain); 2415 if (sp->state == IPSEC_SPSTATE_DEAD) 2416 continue; 2417 key_sp_dead(sp); 2418 key_sp_unlink(sp); 2419 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2420 continue; 2421 } 2422 } 2423 2424 /* Invalidate all cached SPD pointers in the PCBs. */ 2425 ipsec_invalpcbcacheall(); 2426 2427 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2428 2429 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2430 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2431 return key_senderror(so, m, ENOBUFS); 2432 } 2433 2434 if (m->m_next) 2435 m_freem(m->m_next); 2436 m->m_next = NULL; 2437 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2438 newmsg = mtod(m, struct sadb_msg *); 2439 newmsg->sadb_msg_errno = 0; 2440 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2441 2442 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2443 } 2444 2445 static struct sockaddr key_src = { 2446 .sa_len = 2, 2447 .sa_family = PF_KEY, 2448 }; 2449 2450 static struct mbuf * 2451 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2452 { 2453 struct secpolicy *sp; 2454 int cnt; 2455 u_int dir; 2456 struct mbuf *m, *n, *prev; 2457 int totlen; 2458 2459 *lenp = 0; 2460 2461 /* search SPD entry and get buffer size. */ 2462 cnt = 0; 2463 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2464 LIST_FOREACH(sp, &sptree[dir], chain) { 2465 cnt++; 2466 } 2467 } 2468 2469 if (cnt == 0) { 2470 *errorp = ENOENT; 2471 return (NULL); 2472 } 2473 2474 m = NULL; 2475 prev = m; 2476 totlen = 0; 2477 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2478 LIST_FOREACH(sp, &sptree[dir], chain) { 2479 --cnt; 2480 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2481 2482 if (!n) { 2483 *errorp = ENOBUFS; 2484 if (m) m_freem(m); 2485 return (NULL); 2486 } 2487 2488 totlen += n->m_pkthdr.len; 2489 if (!m) { 2490 m = n; 2491 } else { 2492 prev->m_nextpkt = n; 2493 } 2494 prev = n; 2495 } 2496 } 2497 2498 *lenp = totlen; 2499 *errorp = 0; 2500 return (m); 2501 } 2502 2503 /* 2504 * SADB_SPDDUMP processing 2505 * receive 2506 * <base> 2507 * from the user, and dump all SP leaves 2508 * and send, 2509 * <base> ..... 2510 * to the ikmpd. 2511 * 2512 * m will always be freed. 2513 */ 2514 static int 2515 key_spddump(struct socket *so, struct mbuf *m0, 2516 const struct sadb_msghdr *mhp) 2517 { 2518 struct mbuf *n; 2519 int error, len; 2520 int ok, s; 2521 pid_t pid; 2522 2523 KASSERT(so != NULL); 2524 KASSERT(m0 != NULL); 2525 KASSERT(mhp != NULL); 2526 KASSERT(mhp->msg != NULL); 2527 2528 pid = mhp->msg->sadb_msg_pid; 2529 /* 2530 * If the requestor has insufficient socket-buffer space 2531 * for the entire chain, nobody gets any response to the DUMP. 2532 * XXX For now, only the requestor ever gets anything. 2533 * Moreover, if the requestor has any space at all, they receive 2534 * the entire chain, otherwise the request is refused with ENOBUFS. 2535 */ 2536 if (sbspace(&so->so_rcv) <= 0) { 2537 return key_senderror(so, m0, ENOBUFS); 2538 } 2539 2540 s = splsoftnet(); 2541 n = key_setspddump_chain(&error, &len, pid); 2542 splx(s); 2543 2544 if (n == NULL) { 2545 return key_senderror(so, m0, ENOENT); 2546 } 2547 { 2548 uint64_t *ps = PFKEY_STAT_GETREF(); 2549 ps[PFKEY_STAT_IN_TOTAL]++; 2550 ps[PFKEY_STAT_IN_BYTES] += len; 2551 PFKEY_STAT_PUTREF(); 2552 } 2553 2554 /* 2555 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2556 * The requestor receives either the entire chain, or an 2557 * error message with ENOBUFS. 2558 */ 2559 2560 /* 2561 * sbappendchainwith record takes the chain of entries, one 2562 * packet-record per SPD entry, prepends the key_src sockaddr 2563 * to each packet-record, links the sockaddr mbufs into a new 2564 * list of records, then appends the entire resulting 2565 * list to the requesting socket. 2566 */ 2567 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2568 n, SB_PRIO_ONESHOT_OVERFLOW); 2569 2570 if (!ok) { 2571 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2572 m_freem(n); 2573 return key_senderror(so, m0, ENOBUFS); 2574 } 2575 2576 m_freem(m0); 2577 return error; 2578 } 2579 2580 /* 2581 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2582 */ 2583 static int 2584 key_nat_map(struct socket *so, struct mbuf *m, 2585 const struct sadb_msghdr *mhp) 2586 { 2587 struct sadb_x_nat_t_type *type; 2588 struct sadb_x_nat_t_port *sport; 2589 struct sadb_x_nat_t_port *dport; 2590 struct sadb_address *iaddr, *raddr; 2591 struct sadb_x_nat_t_frag *frag; 2592 2593 KASSERT(so != NULL); 2594 KASSERT(m != NULL); 2595 KASSERT(mhp != NULL); 2596 KASSERT(mhp->msg != NULL); 2597 2598 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2599 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2600 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2601 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2602 return key_senderror(so, m, EINVAL); 2603 } 2604 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2605 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2606 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2607 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2608 return key_senderror(so, m, EINVAL); 2609 } 2610 2611 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2612 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2613 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2614 return key_senderror(so, m, EINVAL); 2615 } 2616 2617 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2618 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2619 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2620 return key_senderror(so, m, EINVAL); 2621 } 2622 2623 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2624 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2625 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2626 return key_senderror(so, m, EINVAL); 2627 } 2628 2629 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2630 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2631 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2632 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2633 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2634 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2635 2636 /* 2637 * XXX handle that, it should also contain a SA, or anything 2638 * that enable to update the SA information. 2639 */ 2640 2641 return 0; 2642 } 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 KASSERT(sp != NULL); 2749 2750 /* set msg header */ 2751 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2752 if (!m) { 2753 error = ENOBUFS; 2754 goto fail; 2755 } 2756 result = m; 2757 2758 /* create lifetime extension (current and hard) */ 2759 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2760 m = key_alloc_mbuf(len); 2761 if (!m || m->m_next) { /*XXX*/ 2762 if (m) 2763 m_freem(m); 2764 error = ENOBUFS; 2765 goto fail; 2766 } 2767 memset(mtod(m, void *), 0, len); 2768 lt = mtod(m, struct sadb_lifetime *); 2769 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2770 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2771 lt->sadb_lifetime_allocations = 0; 2772 lt->sadb_lifetime_bytes = 0; 2773 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2774 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2775 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2776 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2777 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2778 lt->sadb_lifetime_allocations = 0; 2779 lt->sadb_lifetime_bytes = 0; 2780 lt->sadb_lifetime_addtime = sp->lifetime; 2781 lt->sadb_lifetime_usetime = sp->validtime; 2782 m_cat(result, m); 2783 2784 /* set sadb_address for source */ 2785 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2786 &sp->spidx.src.sa, 2787 sp->spidx.prefs, sp->spidx.ul_proto); 2788 if (!m) { 2789 error = ENOBUFS; 2790 goto fail; 2791 } 2792 m_cat(result, m); 2793 2794 /* set sadb_address for destination */ 2795 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2796 &sp->spidx.dst.sa, 2797 sp->spidx.prefd, sp->spidx.ul_proto); 2798 if (!m) { 2799 error = ENOBUFS; 2800 goto fail; 2801 } 2802 m_cat(result, m); 2803 2804 /* set secpolicy */ 2805 m = key_sp2msg(sp); 2806 if (!m) { 2807 error = ENOBUFS; 2808 goto fail; 2809 } 2810 m_cat(result, m); 2811 2812 if ((result->m_flags & M_PKTHDR) == 0) { 2813 error = EINVAL; 2814 goto fail; 2815 } 2816 2817 if (result->m_len < sizeof(struct sadb_msg)) { 2818 result = m_pullup(result, sizeof(struct sadb_msg)); 2819 if (result == NULL) { 2820 error = ENOBUFS; 2821 goto fail; 2822 } 2823 } 2824 2825 result->m_pkthdr.len = 0; 2826 for (m = result; m; m = m->m_next) 2827 result->m_pkthdr.len += m->m_len; 2828 2829 mtod(result, struct sadb_msg *)->sadb_msg_len = 2830 PFKEY_UNIT64(result->m_pkthdr.len); 2831 2832 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2833 2834 fail: 2835 if (result) 2836 m_freem(result); 2837 splx(s); 2838 return error; 2839 } 2840 2841 /* %%% SAD management */ 2842 /* 2843 * allocating a memory for new SA head, and copy from the values of mhp. 2844 * OUT: NULL : failure due to the lack of memory. 2845 * others : pointer to new SA head. 2846 */ 2847 static struct secashead * 2848 key_newsah(const struct secasindex *saidx) 2849 { 2850 struct secashead *newsah; 2851 2852 KASSERT(saidx != NULL); 2853 2854 newsah = (struct secashead *) 2855 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2856 if (newsah != NULL) { 2857 int i; 2858 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2859 LIST_INIT(&newsah->savtree[i]); 2860 newsah->saidx = *saidx; 2861 2862 /* add to saidxtree */ 2863 newsah->state = SADB_SASTATE_MATURE; 2864 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2865 } 2866 return(newsah); 2867 } 2868 2869 /* 2870 * delete SA index and all SA registerd. 2871 */ 2872 static void 2873 key_delsah(struct secashead *sah) 2874 { 2875 struct secasvar *sav, *nextsav; 2876 u_int stateidx, state; 2877 int s; 2878 int zombie = 0; 2879 2880 KASSERT(sah != NULL); 2881 2882 s = splsoftnet(); /*called from softclock()*/ 2883 2884 /* searching all SA registerd in the secindex. */ 2885 for (stateidx = 0; 2886 stateidx < _ARRAYLEN(saorder_state_any); 2887 stateidx++) { 2888 2889 state = saorder_state_any[stateidx]; 2890 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2891 sav != NULL; 2892 sav = nextsav) { 2893 2894 nextsav = LIST_NEXT(sav, chain); 2895 2896 if (sav->refcnt == 0) { 2897 /* sanity check */ 2898 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2899 KEY_FREESAV(&sav); 2900 } else { 2901 /* give up to delete this sa */ 2902 zombie++; 2903 } 2904 } 2905 } 2906 2907 /* don't delete sah only if there are savs. */ 2908 if (zombie) { 2909 splx(s); 2910 return; 2911 } 2912 2913 rtcache_free(&sah->sa_route); 2914 2915 /* remove from tree of SA index */ 2916 if (__LIST_CHAINED(sah)) 2917 LIST_REMOVE(sah, chain); 2918 2919 KFREE(sah); 2920 2921 splx(s); 2922 return; 2923 } 2924 2925 /* 2926 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2927 * and copy the values of mhp into new buffer. 2928 * When SAD message type is GETSPI: 2929 * to set sequence number from acq_seq++, 2930 * to set zero to SPI. 2931 * not to call key_setsava(). 2932 * OUT: NULL : fail 2933 * others : pointer to new secasvar. 2934 * 2935 * does not modify mbuf. does not free mbuf on error. 2936 */ 2937 static struct secasvar * 2938 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2939 struct secashead *sah, int *errp, 2940 const char* where, int tag) 2941 { 2942 struct secasvar *newsav; 2943 const struct sadb_sa *xsa; 2944 2945 KASSERT(m != NULL); 2946 KASSERT(mhp != NULL); 2947 KASSERT(mhp->msg != NULL); 2948 KASSERT(sah != NULL); 2949 2950 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2951 if (newsav == NULL) { 2952 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2953 *errp = ENOBUFS; 2954 goto done; 2955 } 2956 memset(newsav, 0, sizeof(struct secasvar)); 2957 2958 switch (mhp->msg->sadb_msg_type) { 2959 case SADB_GETSPI: 2960 newsav->spi = 0; 2961 2962 #ifdef IPSEC_DOSEQCHECK 2963 /* sync sequence number */ 2964 if (mhp->msg->sadb_msg_seq == 0) 2965 newsav->seq = 2966 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2967 else 2968 #endif 2969 newsav->seq = mhp->msg->sadb_msg_seq; 2970 break; 2971 2972 case SADB_ADD: 2973 /* sanity check */ 2974 if (mhp->ext[SADB_EXT_SA] == NULL) { 2975 KFREE(newsav), newsav = NULL; 2976 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2977 *errp = EINVAL; 2978 goto done; 2979 } 2980 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2981 newsav->spi = xsa->sadb_sa_spi; 2982 newsav->seq = mhp->msg->sadb_msg_seq; 2983 break; 2984 default: 2985 KFREE(newsav), newsav = NULL; 2986 *errp = EINVAL; 2987 goto done; 2988 } 2989 2990 /* copy sav values */ 2991 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2992 *errp = key_setsaval(newsav, m, mhp); 2993 if (*errp) { 2994 KFREE(newsav), newsav = NULL; 2995 goto done; 2996 } 2997 } 2998 2999 /* reset created */ 3000 newsav->created = time_uptime; 3001 newsav->pid = mhp->msg->sadb_msg_pid; 3002 3003 /* add to satree */ 3004 newsav->sah = sah; 3005 newsav->refcnt = 1; 3006 newsav->state = SADB_SASTATE_LARVAL; 3007 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 3008 secasvar, chain); 3009 done: 3010 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3011 "DP from %s:%u return SP:%p\n", where, tag, newsav); 3012 3013 return newsav; 3014 } 3015 3016 /* 3017 * free() SA variable entry. 3018 */ 3019 static void 3020 key_delsav(struct secasvar *sav) 3021 { 3022 3023 KASSERT(sav != NULL); 3024 KASSERTMSG(sav->refcnt == 0, 3025 "reference count %u > 0", sav->refcnt); 3026 3027 /* remove from SA header */ 3028 if (__LIST_CHAINED(sav)) 3029 LIST_REMOVE(sav, chain); 3030 3031 /* 3032 * Cleanup xform state. Note that zeroize'ing causes the 3033 * keys to be cleared; otherwise we must do it ourself. 3034 */ 3035 if (sav->tdb_xform != NULL) { 3036 sav->tdb_xform->xf_zeroize(sav); 3037 sav->tdb_xform = NULL; 3038 } else { 3039 if (sav->key_auth != NULL) 3040 explicit_memset(_KEYBUF(sav->key_auth), 0, 3041 _KEYLEN(sav->key_auth)); 3042 if (sav->key_enc != NULL) 3043 explicit_memset(_KEYBUF(sav->key_enc), 0, 3044 _KEYLEN(sav->key_enc)); 3045 } 3046 if (sav->key_auth != NULL) { 3047 KFREE(sav->key_auth); 3048 sav->key_auth = NULL; 3049 } 3050 if (sav->key_enc != NULL) { 3051 KFREE(sav->key_enc); 3052 sav->key_enc = NULL; 3053 } 3054 if (sav->replay != NULL) { 3055 KFREE(sav->replay); 3056 sav->replay = NULL; 3057 } 3058 if (sav->lft_c != NULL) { 3059 KFREE(sav->lft_c); 3060 sav->lft_c = NULL; 3061 } 3062 if (sav->lft_h != NULL) { 3063 KFREE(sav->lft_h); 3064 sav->lft_h = NULL; 3065 } 3066 if (sav->lft_s != NULL) { 3067 KFREE(sav->lft_s); 3068 sav->lft_s = NULL; 3069 } 3070 3071 KFREE(sav); 3072 3073 return; 3074 } 3075 3076 /* 3077 * search SAD. 3078 * OUT: 3079 * NULL : not found 3080 * others : found, pointer to a SA. 3081 */ 3082 static struct secashead * 3083 key_getsah(const struct secasindex *saidx) 3084 { 3085 struct secashead *sah; 3086 3087 LIST_FOREACH(sah, &sahtree, chain) { 3088 if (sah->state == SADB_SASTATE_DEAD) 3089 continue; 3090 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3091 return sah; 3092 } 3093 3094 return NULL; 3095 } 3096 3097 /* 3098 * check not to be duplicated SPI. 3099 * NOTE: this function is too slow due to searching all SAD. 3100 * OUT: 3101 * NULL : not found 3102 * others : found, pointer to a SA. 3103 */ 3104 static struct secasvar * 3105 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3106 { 3107 struct secashead *sah; 3108 struct secasvar *sav; 3109 3110 /* check address family */ 3111 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3112 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3113 return NULL; 3114 } 3115 3116 /* check all SAD */ 3117 LIST_FOREACH(sah, &sahtree, chain) { 3118 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3119 continue; 3120 sav = key_getsavbyspi(sah, spi); 3121 if (sav != NULL) 3122 return sav; 3123 } 3124 3125 return NULL; 3126 } 3127 3128 /* 3129 * search SAD litmited alive SA, protocol, SPI. 3130 * OUT: 3131 * NULL : not found 3132 * others : found, pointer to a SA. 3133 */ 3134 static struct secasvar * 3135 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3136 { 3137 struct secasvar *sav; 3138 u_int stateidx, state; 3139 3140 /* search all status */ 3141 for (stateidx = 0; 3142 stateidx < _ARRAYLEN(saorder_state_alive); 3143 stateidx++) { 3144 3145 state = saorder_state_alive[stateidx]; 3146 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3147 3148 /* sanity check */ 3149 if (sav->state != state) { 3150 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3151 "invalid sav->state (queue: %d SA: %d)\n", 3152 state, sav->state)); 3153 continue; 3154 } 3155 3156 if (sav->spi == spi) 3157 return sav; 3158 } 3159 } 3160 3161 return NULL; 3162 } 3163 3164 /* 3165 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3166 * You must update these if need. 3167 * OUT: 0: success. 3168 * !0: failure. 3169 * 3170 * does not modify mbuf. does not free mbuf on error. 3171 */ 3172 static int 3173 key_setsaval(struct secasvar *sav, struct mbuf *m, 3174 const struct sadb_msghdr *mhp) 3175 { 3176 int error = 0; 3177 3178 KASSERT(m != NULL); 3179 KASSERT(mhp != NULL); 3180 KASSERT(mhp->msg != NULL); 3181 3182 /* initialization */ 3183 sav->replay = NULL; 3184 sav->key_auth = NULL; 3185 sav->key_enc = NULL; 3186 sav->lft_c = NULL; 3187 sav->lft_h = NULL; 3188 sav->lft_s = NULL; 3189 sav->tdb_xform = NULL; /* transform */ 3190 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3191 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3192 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3193 sav->natt_type = 0; 3194 sav->esp_frag = 0; 3195 3196 /* SA */ 3197 if (mhp->ext[SADB_EXT_SA] != NULL) { 3198 const struct sadb_sa *sa0; 3199 3200 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3201 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3202 error = EINVAL; 3203 goto fail; 3204 } 3205 3206 sav->alg_auth = sa0->sadb_sa_auth; 3207 sav->alg_enc = sa0->sadb_sa_encrypt; 3208 sav->flags = sa0->sadb_sa_flags; 3209 3210 /* replay window */ 3211 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3212 sav->replay = (struct secreplay *) 3213 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3214 if (sav->replay == NULL) { 3215 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3216 error = ENOBUFS; 3217 goto fail; 3218 } 3219 if (sa0->sadb_sa_replay != 0) 3220 sav->replay->bitmap = (char*)(sav->replay+1); 3221 sav->replay->wsize = sa0->sadb_sa_replay; 3222 } 3223 } 3224 3225 /* Authentication keys */ 3226 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3227 const struct sadb_key *key0; 3228 int len; 3229 3230 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3231 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3232 3233 error = 0; 3234 if (len < sizeof(*key0)) { 3235 error = EINVAL; 3236 goto fail; 3237 } 3238 switch (mhp->msg->sadb_msg_satype) { 3239 case SADB_SATYPE_AH: 3240 case SADB_SATYPE_ESP: 3241 case SADB_X_SATYPE_TCPSIGNATURE: 3242 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3243 sav->alg_auth != SADB_X_AALG_NULL) 3244 error = EINVAL; 3245 break; 3246 case SADB_X_SATYPE_IPCOMP: 3247 default: 3248 error = EINVAL; 3249 break; 3250 } 3251 if (error) { 3252 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3253 goto fail; 3254 } 3255 3256 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3257 if (sav->key_auth == NULL) { 3258 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3259 error = ENOBUFS; 3260 goto fail; 3261 } 3262 } 3263 3264 /* Encryption key */ 3265 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3266 const struct sadb_key *key0; 3267 int len; 3268 3269 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3270 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3271 3272 error = 0; 3273 if (len < sizeof(*key0)) { 3274 error = EINVAL; 3275 goto fail; 3276 } 3277 switch (mhp->msg->sadb_msg_satype) { 3278 case SADB_SATYPE_ESP: 3279 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3280 sav->alg_enc != SADB_EALG_NULL) { 3281 error = EINVAL; 3282 break; 3283 } 3284 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3285 if (sav->key_enc == NULL) { 3286 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3287 error = ENOBUFS; 3288 goto fail; 3289 } 3290 break; 3291 case SADB_X_SATYPE_IPCOMP: 3292 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3293 error = EINVAL; 3294 sav->key_enc = NULL; /*just in case*/ 3295 break; 3296 case SADB_SATYPE_AH: 3297 case SADB_X_SATYPE_TCPSIGNATURE: 3298 default: 3299 error = EINVAL; 3300 break; 3301 } 3302 if (error) { 3303 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3304 goto fail; 3305 } 3306 } 3307 3308 /* set iv */ 3309 sav->ivlen = 0; 3310 3311 switch (mhp->msg->sadb_msg_satype) { 3312 case SADB_SATYPE_AH: 3313 error = xform_init(sav, XF_AH); 3314 break; 3315 case SADB_SATYPE_ESP: 3316 error = xform_init(sav, XF_ESP); 3317 break; 3318 case SADB_X_SATYPE_IPCOMP: 3319 error = xform_init(sav, XF_IPCOMP); 3320 break; 3321 case SADB_X_SATYPE_TCPSIGNATURE: 3322 error = xform_init(sav, XF_TCPSIGNATURE); 3323 break; 3324 } 3325 if (error) { 3326 ipseclog((LOG_DEBUG, 3327 "key_setsaval: unable to initialize SA type %u.\n", 3328 mhp->msg->sadb_msg_satype)); 3329 goto fail; 3330 } 3331 3332 /* reset created */ 3333 sav->created = time_uptime; 3334 3335 /* make lifetime for CURRENT */ 3336 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3337 sizeof(struct sadb_lifetime)); 3338 if (sav->lft_c == NULL) { 3339 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3340 error = ENOBUFS; 3341 goto fail; 3342 } 3343 3344 sav->lft_c->sadb_lifetime_len = 3345 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3346 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3347 sav->lft_c->sadb_lifetime_allocations = 0; 3348 sav->lft_c->sadb_lifetime_bytes = 0; 3349 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3350 sav->lft_c->sadb_lifetime_usetime = 0; 3351 3352 /* lifetimes for HARD and SOFT */ 3353 { 3354 const struct sadb_lifetime *lft0; 3355 3356 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3357 if (lft0 != NULL) { 3358 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3359 error = EINVAL; 3360 goto fail; 3361 } 3362 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3363 sizeof(*lft0)); 3364 if (sav->lft_h == NULL) { 3365 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3366 error = ENOBUFS; 3367 goto fail; 3368 } 3369 /* to be initialize ? */ 3370 } 3371 3372 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3373 if (lft0 != NULL) { 3374 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3375 error = EINVAL; 3376 goto fail; 3377 } 3378 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3379 sizeof(*lft0)); 3380 if (sav->lft_s == NULL) { 3381 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3382 error = ENOBUFS; 3383 goto fail; 3384 } 3385 /* to be initialize ? */ 3386 } 3387 } 3388 3389 return 0; 3390 3391 fail: 3392 /* initialization */ 3393 if (sav->replay != NULL) { 3394 KFREE(sav->replay); 3395 sav->replay = NULL; 3396 } 3397 if (sav->key_auth != NULL) { 3398 KFREE(sav->key_auth); 3399 sav->key_auth = NULL; 3400 } 3401 if (sav->key_enc != NULL) { 3402 KFREE(sav->key_enc); 3403 sav->key_enc = NULL; 3404 } 3405 if (sav->lft_c != NULL) { 3406 KFREE(sav->lft_c); 3407 sav->lft_c = NULL; 3408 } 3409 if (sav->lft_h != NULL) { 3410 KFREE(sav->lft_h); 3411 sav->lft_h = NULL; 3412 } 3413 if (sav->lft_s != NULL) { 3414 KFREE(sav->lft_s); 3415 sav->lft_s = NULL; 3416 } 3417 3418 return error; 3419 } 3420 3421 /* 3422 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3423 * OUT: 0: valid 3424 * other: errno 3425 */ 3426 static int 3427 key_mature(struct secasvar *sav) 3428 { 3429 int error; 3430 3431 /* check SPI value */ 3432 switch (sav->sah->saidx.proto) { 3433 case IPPROTO_ESP: 3434 case IPPROTO_AH: 3435 if (ntohl(sav->spi) <= 255) { 3436 ipseclog((LOG_DEBUG, 3437 "key_mature: illegal range of SPI %u.\n", 3438 (u_int32_t)ntohl(sav->spi))); 3439 return EINVAL; 3440 } 3441 break; 3442 } 3443 3444 /* check satype */ 3445 switch (sav->sah->saidx.proto) { 3446 case IPPROTO_ESP: 3447 /* check flags */ 3448 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3449 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3450 ipseclog((LOG_DEBUG, "key_mature: " 3451 "invalid flag (derived) given to old-esp.\n")); 3452 return EINVAL; 3453 } 3454 error = xform_init(sav, XF_ESP); 3455 break; 3456 case IPPROTO_AH: 3457 /* check flags */ 3458 if (sav->flags & SADB_X_EXT_DERIV) { 3459 ipseclog((LOG_DEBUG, "key_mature: " 3460 "invalid flag (derived) given to AH SA.\n")); 3461 return EINVAL; 3462 } 3463 if (sav->alg_enc != SADB_EALG_NONE) { 3464 ipseclog((LOG_DEBUG, "key_mature: " 3465 "protocol and algorithm mismated.\n")); 3466 return(EINVAL); 3467 } 3468 error = xform_init(sav, XF_AH); 3469 break; 3470 case IPPROTO_IPCOMP: 3471 if (sav->alg_auth != SADB_AALG_NONE) { 3472 ipseclog((LOG_DEBUG, "key_mature: " 3473 "protocol and algorithm mismated.\n")); 3474 return(EINVAL); 3475 } 3476 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3477 && ntohl(sav->spi) >= 0x10000) { 3478 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3479 return(EINVAL); 3480 } 3481 error = xform_init(sav, XF_IPCOMP); 3482 break; 3483 case IPPROTO_TCP: 3484 if (sav->alg_enc != SADB_EALG_NONE) { 3485 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3486 "mismated.\n", __func__)); 3487 return(EINVAL); 3488 } 3489 error = xform_init(sav, XF_TCPSIGNATURE); 3490 break; 3491 default: 3492 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3493 error = EPROTONOSUPPORT; 3494 break; 3495 } 3496 if (error == 0) 3497 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3498 return (error); 3499 } 3500 3501 /* 3502 * subroutine for SADB_GET and SADB_DUMP. 3503 */ 3504 static struct mbuf * 3505 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3506 u_int32_t seq, u_int32_t pid) 3507 { 3508 struct mbuf *result = NULL, *tres = NULL, *m; 3509 int l = 0; 3510 int i; 3511 void *p; 3512 struct sadb_lifetime lt; 3513 int dumporder[] = { 3514 SADB_EXT_SA, SADB_X_EXT_SA2, 3515 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3516 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3517 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3518 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3519 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3520 SADB_X_EXT_NAT_T_TYPE, 3521 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3522 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3523 SADB_X_EXT_NAT_T_FRAG, 3524 3525 }; 3526 3527 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3528 if (m == NULL) 3529 goto fail; 3530 result = m; 3531 3532 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3533 m = NULL; 3534 p = NULL; 3535 switch (dumporder[i]) { 3536 case SADB_EXT_SA: 3537 m = key_setsadbsa(sav); 3538 break; 3539 3540 case SADB_X_EXT_SA2: 3541 m = key_setsadbxsa2(sav->sah->saidx.mode, 3542 sav->replay ? sav->replay->count : 0, 3543 sav->sah->saidx.reqid); 3544 break; 3545 3546 case SADB_EXT_ADDRESS_SRC: 3547 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3548 &sav->sah->saidx.src.sa, 3549 FULLMASK, IPSEC_ULPROTO_ANY); 3550 break; 3551 3552 case SADB_EXT_ADDRESS_DST: 3553 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3554 &sav->sah->saidx.dst.sa, 3555 FULLMASK, IPSEC_ULPROTO_ANY); 3556 break; 3557 3558 case SADB_EXT_KEY_AUTH: 3559 if (!sav->key_auth) 3560 continue; 3561 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3562 p = sav->key_auth; 3563 break; 3564 3565 case SADB_EXT_KEY_ENCRYPT: 3566 if (!sav->key_enc) 3567 continue; 3568 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3569 p = sav->key_enc; 3570 break; 3571 3572 case SADB_EXT_LIFETIME_CURRENT: 3573 if (!sav->lft_c) 3574 continue; 3575 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3576 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3577 lt.sadb_lifetime_addtime += time_second - time_uptime; 3578 lt.sadb_lifetime_usetime += time_second - time_uptime; 3579 p = < 3580 break; 3581 3582 case SADB_EXT_LIFETIME_HARD: 3583 if (!sav->lft_h) 3584 continue; 3585 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3586 p = sav->lft_h; 3587 break; 3588 3589 case SADB_EXT_LIFETIME_SOFT: 3590 if (!sav->lft_s) 3591 continue; 3592 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3593 p = sav->lft_s; 3594 break; 3595 3596 case SADB_X_EXT_NAT_T_TYPE: 3597 m = key_setsadbxtype(sav->natt_type); 3598 break; 3599 3600 case SADB_X_EXT_NAT_T_DPORT: 3601 if (sav->natt_type == 0) 3602 continue; 3603 m = key_setsadbxport( 3604 key_portfromsaddr(&sav->sah->saidx.dst), 3605 SADB_X_EXT_NAT_T_DPORT); 3606 break; 3607 3608 case SADB_X_EXT_NAT_T_SPORT: 3609 if (sav->natt_type == 0) 3610 continue; 3611 m = key_setsadbxport( 3612 key_portfromsaddr(&sav->sah->saidx.src), 3613 SADB_X_EXT_NAT_T_SPORT); 3614 break; 3615 3616 case SADB_X_EXT_NAT_T_FRAG: 3617 /* don't send frag info if not set */ 3618 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3619 continue; 3620 m = key_setsadbxfrag(sav->esp_frag); 3621 break; 3622 3623 case SADB_X_EXT_NAT_T_OAI: 3624 case SADB_X_EXT_NAT_T_OAR: 3625 continue; 3626 3627 case SADB_EXT_ADDRESS_PROXY: 3628 case SADB_EXT_IDENTITY_SRC: 3629 case SADB_EXT_IDENTITY_DST: 3630 /* XXX: should we brought from SPD ? */ 3631 case SADB_EXT_SENSITIVITY: 3632 default: 3633 continue; 3634 } 3635 3636 KASSERT(!(m && p)); 3637 if (!m && !p) 3638 goto fail; 3639 if (p && tres) { 3640 M_PREPEND(tres, l, M_DONTWAIT); 3641 if (!tres) 3642 goto fail; 3643 memcpy(mtod(tres, void *), p, l); 3644 continue; 3645 } 3646 if (p) { 3647 m = key_alloc_mbuf(l); 3648 if (!m) 3649 goto fail; 3650 m_copyback(m, 0, l, p); 3651 } 3652 3653 if (tres) 3654 m_cat(m, tres); 3655 tres = m; 3656 } 3657 3658 m_cat(result, tres); 3659 tres = NULL; /* avoid free on error below */ 3660 3661 if (result->m_len < sizeof(struct sadb_msg)) { 3662 result = m_pullup(result, sizeof(struct sadb_msg)); 3663 if (result == NULL) 3664 goto fail; 3665 } 3666 3667 result->m_pkthdr.len = 0; 3668 for (m = result; m; m = m->m_next) 3669 result->m_pkthdr.len += m->m_len; 3670 3671 mtod(result, struct sadb_msg *)->sadb_msg_len = 3672 PFKEY_UNIT64(result->m_pkthdr.len); 3673 3674 return result; 3675 3676 fail: 3677 m_freem(result); 3678 m_freem(tres); 3679 return NULL; 3680 } 3681 3682 3683 /* 3684 * set a type in sadb_x_nat_t_type 3685 */ 3686 static struct mbuf * 3687 key_setsadbxtype(u_int16_t type) 3688 { 3689 struct mbuf *m; 3690 size_t len; 3691 struct sadb_x_nat_t_type *p; 3692 3693 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3694 3695 m = key_alloc_mbuf(len); 3696 if (!m || m->m_next) { /*XXX*/ 3697 if (m) 3698 m_freem(m); 3699 return NULL; 3700 } 3701 3702 p = mtod(m, struct sadb_x_nat_t_type *); 3703 3704 memset(p, 0, len); 3705 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3706 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3707 p->sadb_x_nat_t_type_type = type; 3708 3709 return m; 3710 } 3711 /* 3712 * set a port in sadb_x_nat_t_port. port is in network order 3713 */ 3714 static struct mbuf * 3715 key_setsadbxport(u_int16_t port, u_int16_t type) 3716 { 3717 struct mbuf *m; 3718 size_t len; 3719 struct sadb_x_nat_t_port *p; 3720 3721 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3722 3723 m = key_alloc_mbuf(len); 3724 if (!m || m->m_next) { /*XXX*/ 3725 if (m) 3726 m_freem(m); 3727 return NULL; 3728 } 3729 3730 p = mtod(m, struct sadb_x_nat_t_port *); 3731 3732 memset(p, 0, len); 3733 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3734 p->sadb_x_nat_t_port_exttype = type; 3735 p->sadb_x_nat_t_port_port = port; 3736 3737 return m; 3738 } 3739 3740 /* 3741 * set fragmentation info in sadb_x_nat_t_frag 3742 */ 3743 static struct mbuf * 3744 key_setsadbxfrag(u_int16_t flen) 3745 { 3746 struct mbuf *m; 3747 size_t len; 3748 struct sadb_x_nat_t_frag *p; 3749 3750 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3751 3752 m = key_alloc_mbuf(len); 3753 if (!m || m->m_next) { /*XXX*/ 3754 if (m) 3755 m_freem(m); 3756 return NULL; 3757 } 3758 3759 p = mtod(m, struct sadb_x_nat_t_frag *); 3760 3761 memset(p, 0, len); 3762 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3763 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3764 p->sadb_x_nat_t_frag_fraglen = flen; 3765 3766 return m; 3767 } 3768 3769 /* 3770 * Get port from sockaddr, port is in network order 3771 */ 3772 u_int16_t 3773 key_portfromsaddr(const union sockaddr_union *saddr) 3774 { 3775 u_int16_t port; 3776 3777 switch (saddr->sa.sa_family) { 3778 case AF_INET: { 3779 port = saddr->sin.sin_port; 3780 break; 3781 } 3782 #ifdef INET6 3783 case AF_INET6: { 3784 port = saddr->sin6.sin6_port; 3785 break; 3786 } 3787 #endif 3788 default: 3789 printf("%s: unexpected address family\n", __func__); 3790 port = 0; 3791 break; 3792 } 3793 3794 return port; 3795 } 3796 3797 3798 /* 3799 * Set port is struct sockaddr. port is in network order 3800 */ 3801 static void 3802 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3803 { 3804 switch (saddr->sa.sa_family) { 3805 case AF_INET: { 3806 saddr->sin.sin_port = port; 3807 break; 3808 } 3809 #ifdef INET6 3810 case AF_INET6: { 3811 saddr->sin6.sin6_port = port; 3812 break; 3813 } 3814 #endif 3815 default: 3816 printf("%s: unexpected address family %d\n", __func__, 3817 saddr->sa.sa_family); 3818 break; 3819 } 3820 3821 return; 3822 } 3823 3824 /* 3825 * Safety check sa_len 3826 */ 3827 static int 3828 key_checksalen(const union sockaddr_union *saddr) 3829 { 3830 switch (saddr->sa.sa_family) { 3831 case AF_INET: 3832 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3833 return -1; 3834 break; 3835 #ifdef INET6 3836 case AF_INET6: 3837 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3838 return -1; 3839 break; 3840 #endif 3841 default: 3842 printf("%s: unexpected sa_family %d\n", __func__, 3843 saddr->sa.sa_family); 3844 return -1; 3845 break; 3846 } 3847 return 0; 3848 } 3849 3850 3851 /* 3852 * set data into sadb_msg. 3853 */ 3854 static struct mbuf * 3855 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3856 u_int32_t seq, pid_t pid, u_int16_t reserved) 3857 { 3858 struct mbuf *m; 3859 struct sadb_msg *p; 3860 int len; 3861 3862 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3863 if (len > MCLBYTES) 3864 return NULL; 3865 MGETHDR(m, M_DONTWAIT, MT_DATA); 3866 if (m && len > MHLEN) { 3867 MCLGET(m, M_DONTWAIT); 3868 if ((m->m_flags & M_EXT) == 0) { 3869 m_freem(m); 3870 m = NULL; 3871 } 3872 } 3873 if (!m) 3874 return NULL; 3875 m->m_pkthdr.len = m->m_len = len; 3876 m->m_next = NULL; 3877 3878 p = mtod(m, struct sadb_msg *); 3879 3880 memset(p, 0, len); 3881 p->sadb_msg_version = PF_KEY_V2; 3882 p->sadb_msg_type = type; 3883 p->sadb_msg_errno = 0; 3884 p->sadb_msg_satype = satype; 3885 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3886 p->sadb_msg_reserved = reserved; 3887 p->sadb_msg_seq = seq; 3888 p->sadb_msg_pid = (u_int32_t)pid; 3889 3890 return m; 3891 } 3892 3893 /* 3894 * copy secasvar data into sadb_address. 3895 */ 3896 static struct mbuf * 3897 key_setsadbsa(struct secasvar *sav) 3898 { 3899 struct mbuf *m; 3900 struct sadb_sa *p; 3901 int len; 3902 3903 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3904 m = key_alloc_mbuf(len); 3905 if (!m || m->m_next) { /*XXX*/ 3906 if (m) 3907 m_freem(m); 3908 return NULL; 3909 } 3910 3911 p = mtod(m, struct sadb_sa *); 3912 3913 memset(p, 0, len); 3914 p->sadb_sa_len = PFKEY_UNIT64(len); 3915 p->sadb_sa_exttype = SADB_EXT_SA; 3916 p->sadb_sa_spi = sav->spi; 3917 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3918 p->sadb_sa_state = sav->state; 3919 p->sadb_sa_auth = sav->alg_auth; 3920 p->sadb_sa_encrypt = sav->alg_enc; 3921 p->sadb_sa_flags = sav->flags; 3922 3923 return m; 3924 } 3925 3926 /* 3927 * set data into sadb_address. 3928 */ 3929 static struct mbuf * 3930 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3931 u_int8_t prefixlen, u_int16_t ul_proto) 3932 { 3933 struct mbuf *m; 3934 struct sadb_address *p; 3935 size_t len; 3936 3937 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3938 PFKEY_ALIGN8(saddr->sa_len); 3939 m = key_alloc_mbuf(len); 3940 if (!m || m->m_next) { /*XXX*/ 3941 if (m) 3942 m_freem(m); 3943 return NULL; 3944 } 3945 3946 p = mtod(m, struct sadb_address *); 3947 3948 memset(p, 0, len); 3949 p->sadb_address_len = PFKEY_UNIT64(len); 3950 p->sadb_address_exttype = exttype; 3951 p->sadb_address_proto = ul_proto; 3952 if (prefixlen == FULLMASK) { 3953 switch (saddr->sa_family) { 3954 case AF_INET: 3955 prefixlen = sizeof(struct in_addr) << 3; 3956 break; 3957 case AF_INET6: 3958 prefixlen = sizeof(struct in6_addr) << 3; 3959 break; 3960 default: 3961 ; /*XXX*/ 3962 } 3963 } 3964 p->sadb_address_prefixlen = prefixlen; 3965 p->sadb_address_reserved = 0; 3966 3967 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3968 saddr, saddr->sa_len); 3969 3970 return m; 3971 } 3972 3973 #if 0 3974 /* 3975 * set data into sadb_ident. 3976 */ 3977 static struct mbuf * 3978 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3979 void *string, int stringlen, u_int64_t id) 3980 { 3981 struct mbuf *m; 3982 struct sadb_ident *p; 3983 size_t len; 3984 3985 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3986 m = key_alloc_mbuf(len); 3987 if (!m || m->m_next) { /*XXX*/ 3988 if (m) 3989 m_freem(m); 3990 return NULL; 3991 } 3992 3993 p = mtod(m, struct sadb_ident *); 3994 3995 memset(p, 0, len); 3996 p->sadb_ident_len = PFKEY_UNIT64(len); 3997 p->sadb_ident_exttype = exttype; 3998 p->sadb_ident_type = idtype; 3999 p->sadb_ident_reserved = 0; 4000 p->sadb_ident_id = id; 4001 4002 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 4003 string, stringlen); 4004 4005 return m; 4006 } 4007 #endif 4008 4009 /* 4010 * set data into sadb_x_sa2. 4011 */ 4012 static struct mbuf * 4013 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 4014 { 4015 struct mbuf *m; 4016 struct sadb_x_sa2 *p; 4017 size_t len; 4018 4019 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4020 m = key_alloc_mbuf(len); 4021 if (!m || m->m_next) { /*XXX*/ 4022 if (m) 4023 m_freem(m); 4024 return NULL; 4025 } 4026 4027 p = mtod(m, struct sadb_x_sa2 *); 4028 4029 memset(p, 0, len); 4030 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4031 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4032 p->sadb_x_sa2_mode = mode; 4033 p->sadb_x_sa2_reserved1 = 0; 4034 p->sadb_x_sa2_reserved2 = 0; 4035 p->sadb_x_sa2_sequence = seq; 4036 p->sadb_x_sa2_reqid = reqid; 4037 4038 return m; 4039 } 4040 4041 /* 4042 * set data into sadb_x_policy 4043 */ 4044 static struct mbuf * 4045 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 4046 { 4047 struct mbuf *m; 4048 struct sadb_x_policy *p; 4049 size_t len; 4050 4051 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4052 m = key_alloc_mbuf(len); 4053 if (!m || m->m_next) { /*XXX*/ 4054 if (m) 4055 m_freem(m); 4056 return NULL; 4057 } 4058 4059 p = mtod(m, struct sadb_x_policy *); 4060 4061 memset(p, 0, len); 4062 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4063 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4064 p->sadb_x_policy_type = type; 4065 p->sadb_x_policy_dir = dir; 4066 p->sadb_x_policy_id = id; 4067 4068 return m; 4069 } 4070 4071 /* %%% utilities */ 4072 /* 4073 * copy a buffer into the new buffer allocated. 4074 */ 4075 static void * 4076 key_newbuf(const void *src, u_int len) 4077 { 4078 void *new; 4079 4080 KMALLOC(new, void *, len); 4081 if (new == NULL) { 4082 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 4083 return NULL; 4084 } 4085 memcpy(new, src, len); 4086 4087 return new; 4088 } 4089 4090 /* compare my own address 4091 * OUT: 1: true, i.e. my address. 4092 * 0: false 4093 */ 4094 int 4095 key_ismyaddr(const struct sockaddr *sa) 4096 { 4097 #ifdef INET 4098 const struct sockaddr_in *sin; 4099 const struct in_ifaddr *ia; 4100 int s; 4101 #endif 4102 4103 KASSERT(sa != NULL); 4104 4105 switch (sa->sa_family) { 4106 #ifdef INET 4107 case AF_INET: 4108 sin = (const struct sockaddr_in *)sa; 4109 s = pserialize_read_enter(); 4110 IN_ADDRLIST_READER_FOREACH(ia) { 4111 if (sin->sin_family == ia->ia_addr.sin_family && 4112 sin->sin_len == ia->ia_addr.sin_len && 4113 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4114 { 4115 pserialize_read_exit(s); 4116 return 1; 4117 } 4118 } 4119 pserialize_read_exit(s); 4120 break; 4121 #endif 4122 #ifdef INET6 4123 case AF_INET6: 4124 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4125 #endif 4126 } 4127 4128 return 0; 4129 } 4130 4131 #ifdef INET6 4132 /* 4133 * compare my own address for IPv6. 4134 * 1: ours 4135 * 0: other 4136 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4137 */ 4138 #include <netinet6/in6_var.h> 4139 4140 static int 4141 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4142 { 4143 struct in6_ifaddr *ia; 4144 int s; 4145 struct psref psref; 4146 int bound; 4147 int ours = 1; 4148 4149 bound = curlwp_bind(); 4150 s = pserialize_read_enter(); 4151 IN6_ADDRLIST_READER_FOREACH(ia) { 4152 bool ingroup; 4153 4154 if (key_sockaddrcmp((const struct sockaddr *)&sin6, 4155 (const struct sockaddr *)&ia->ia_addr, 0) == 0) { 4156 pserialize_read_exit(s); 4157 goto ours; 4158 } 4159 ia6_acquire(ia, &psref); 4160 pserialize_read_exit(s); 4161 4162 /* 4163 * XXX Multicast 4164 * XXX why do we care about multlicast here while we don't care 4165 * about IPv4 multicast?? 4166 * XXX scope 4167 */ 4168 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4169 if (ingroup) { 4170 ia6_release(ia, &psref); 4171 goto ours; 4172 } 4173 4174 s = pserialize_read_enter(); 4175 ia6_release(ia, &psref); 4176 } 4177 pserialize_read_exit(s); 4178 4179 /* loopback, just for safety */ 4180 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4181 goto ours; 4182 4183 ours = 0; 4184 ours: 4185 curlwp_bindx(bound); 4186 4187 return ours; 4188 } 4189 #endif /*INET6*/ 4190 4191 /* 4192 * compare two secasindex structure. 4193 * flag can specify to compare 2 saidxes. 4194 * compare two secasindex structure without both mode and reqid. 4195 * don't compare port. 4196 * IN: 4197 * saidx0: source, it can be in SAD. 4198 * saidx1: object. 4199 * OUT: 4200 * 1 : equal 4201 * 0 : not equal 4202 */ 4203 static int 4204 key_cmpsaidx( 4205 const struct secasindex *saidx0, 4206 const struct secasindex *saidx1, 4207 int flag) 4208 { 4209 int chkport; 4210 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4211 4212 /* sanity */ 4213 if (saidx0 == NULL && saidx1 == NULL) 4214 return 1; 4215 4216 if (saidx0 == NULL || saidx1 == NULL) 4217 return 0; 4218 4219 if (saidx0->proto != saidx1->proto) 4220 return 0; 4221 4222 if (flag == CMP_EXACTLY) { 4223 if (saidx0->mode != saidx1->mode) 4224 return 0; 4225 if (saidx0->reqid != saidx1->reqid) 4226 return 0; 4227 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4228 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4229 return 0; 4230 } else { 4231 4232 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4233 if (flag == CMP_MODE_REQID 4234 ||flag == CMP_REQID) { 4235 /* 4236 * If reqid of SPD is non-zero, unique SA is required. 4237 * The result must be of same reqid in this case. 4238 */ 4239 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4240 return 0; 4241 } 4242 4243 if (flag == CMP_MODE_REQID) { 4244 if (saidx0->mode != IPSEC_MODE_ANY 4245 && saidx0->mode != saidx1->mode) 4246 return 0; 4247 } 4248 4249 4250 sa0src = &saidx0->src.sa; 4251 sa0dst = &saidx0->dst.sa; 4252 sa1src = &saidx1->src.sa; 4253 sa1dst = &saidx1->dst.sa; 4254 /* 4255 * If NAT-T is enabled, check ports for tunnel mode. 4256 * Don't do it for transport mode, as there is no 4257 * port information available in the SP. 4258 * Also don't check ports if they are set to zero 4259 * in the SPD: This means we have a non-generated 4260 * SPD which can't know UDP ports. 4261 */ 4262 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4263 chkport = PORT_LOOSE; 4264 else 4265 chkport = PORT_NONE; 4266 4267 if (key_sockaddrcmp(sa0src, sa1src, chkport) != 0) { 4268 return 0; 4269 } 4270 if (key_sockaddrcmp(sa0dst, sa1dst, chkport) != 0) { 4271 return 0; 4272 } 4273 } 4274 4275 return 1; 4276 } 4277 4278 /* 4279 * compare two secindex structure exactly. 4280 * IN: 4281 * spidx0: source, it is often in SPD. 4282 * spidx1: object, it is often from PFKEY message. 4283 * OUT: 4284 * 1 : equal 4285 * 0 : not equal 4286 */ 4287 int 4288 key_cmpspidx_exactly( 4289 const struct secpolicyindex *spidx0, 4290 const struct secpolicyindex *spidx1) 4291 { 4292 /* sanity */ 4293 if (spidx0 == NULL && spidx1 == NULL) 4294 return 1; 4295 4296 if (spidx0 == NULL || spidx1 == NULL) 4297 return 0; 4298 4299 if (spidx0->prefs != spidx1->prefs 4300 || spidx0->prefd != spidx1->prefd 4301 || spidx0->ul_proto != spidx1->ul_proto) 4302 return 0; 4303 4304 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) == 0 && 4305 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT) == 0; 4306 } 4307 4308 /* 4309 * compare two secindex structure with mask. 4310 * IN: 4311 * spidx0: source, it is often in SPD. 4312 * spidx1: object, it is often from IP header. 4313 * OUT: 4314 * 1 : equal 4315 * 0 : not equal 4316 */ 4317 int 4318 key_cmpspidx_withmask( 4319 const struct secpolicyindex *spidx0, 4320 const struct secpolicyindex *spidx1) 4321 { 4322 /* sanity */ 4323 if (spidx0 == NULL && spidx1 == NULL) 4324 return 1; 4325 4326 if (spidx0 == NULL || spidx1 == NULL) 4327 return 0; 4328 4329 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4330 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4331 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4332 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4333 return 0; 4334 4335 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4336 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4337 && spidx0->ul_proto != spidx1->ul_proto) 4338 return 0; 4339 4340 switch (spidx0->src.sa.sa_family) { 4341 case AF_INET: 4342 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4343 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4344 return 0; 4345 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4346 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4347 return 0; 4348 break; 4349 case AF_INET6: 4350 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4351 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4352 return 0; 4353 /* 4354 * scope_id check. if sin6_scope_id is 0, we regard it 4355 * as a wildcard scope, which matches any scope zone ID. 4356 */ 4357 if (spidx0->src.sin6.sin6_scope_id && 4358 spidx1->src.sin6.sin6_scope_id && 4359 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4360 return 0; 4361 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4362 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4363 return 0; 4364 break; 4365 default: 4366 /* XXX */ 4367 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4368 return 0; 4369 break; 4370 } 4371 4372 switch (spidx0->dst.sa.sa_family) { 4373 case AF_INET: 4374 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4375 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4376 return 0; 4377 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4378 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4379 return 0; 4380 break; 4381 case AF_INET6: 4382 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4383 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4384 return 0; 4385 /* 4386 * scope_id check. if sin6_scope_id is 0, we regard it 4387 * as a wildcard scope, which matches any scope zone ID. 4388 */ 4389 if (spidx0->src.sin6.sin6_scope_id && 4390 spidx1->src.sin6.sin6_scope_id && 4391 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4392 return 0; 4393 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4394 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4395 return 0; 4396 break; 4397 default: 4398 /* XXX */ 4399 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4400 return 0; 4401 break; 4402 } 4403 4404 /* XXX Do we check other field ? e.g. flowinfo */ 4405 4406 return 1; 4407 } 4408 4409 /* returns 0 on match */ 4410 static int 4411 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4412 { 4413 switch (howport) { 4414 case PORT_NONE: 4415 return 0; 4416 case PORT_LOOSE: 4417 if (port1 == 0 || port2 == 0) 4418 return 0; 4419 /*FALLTHROUGH*/ 4420 case PORT_STRICT: 4421 if (port1 != port2) { 4422 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4423 "port fail %d != %d\n", port1, port2); 4424 return 1; 4425 } 4426 return 0; 4427 default: 4428 KASSERT(0); 4429 return 1; 4430 } 4431 } 4432 4433 /* returns 0 on match */ 4434 static int 4435 key_sockaddrcmp( 4436 const struct sockaddr *sa1, 4437 const struct sockaddr *sa2, 4438 int howport) 4439 { 4440 const struct sockaddr_in *sin1, *sin2; 4441 const struct sockaddr_in6 *sin61, *sin62; 4442 4443 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4444 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4445 "fam/len fail %d != %d || %d != %d\n", 4446 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4447 sa2->sa_len); 4448 return 1; 4449 } 4450 4451 switch (sa1->sa_family) { 4452 case AF_INET: 4453 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4454 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4455 "len fail %d != %zu\n", 4456 sa1->sa_len, sizeof(struct sockaddr_in)); 4457 return 1; 4458 } 4459 sin1 = (const struct sockaddr_in *)sa1; 4460 sin2 = (const struct sockaddr_in *)sa2; 4461 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4462 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4463 "addr fail %#x != %#x\n", 4464 sin1->sin_addr.s_addr, sin2->sin_addr.s_addr); 4465 return 1; 4466 } 4467 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4468 return 1; 4469 } 4470 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4471 "addr success %#x[%d] == %#x[%d]\n", 4472 sin1->sin_addr.s_addr, sin1->sin_port, 4473 sin2->sin_addr.s_addr, sin2->sin_port); 4474 break; 4475 case AF_INET6: 4476 sin61 = (const struct sockaddr_in6 *)sa1; 4477 sin62 = (const struct sockaddr_in6 *)sa2; 4478 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4479 return 1; /*EINVAL*/ 4480 4481 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4482 return 1; 4483 } 4484 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4485 return 1; 4486 } 4487 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4488 return 1; 4489 } 4490 break; 4491 default: 4492 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4493 return 1; 4494 break; 4495 } 4496 4497 return 0; 4498 } 4499 4500 /* 4501 * compare two buffers with mask. 4502 * IN: 4503 * addr1: source 4504 * addr2: object 4505 * bits: Number of bits to compare 4506 * OUT: 4507 * 1 : equal 4508 * 0 : not equal 4509 */ 4510 static int 4511 key_bbcmp(const void *a1, const void *a2, u_int bits) 4512 { 4513 const unsigned char *p1 = a1; 4514 const unsigned char *p2 = a2; 4515 4516 /* XXX: This could be considerably faster if we compare a word 4517 * at a time, but it is complicated on LSB Endian machines */ 4518 4519 /* Handle null pointers */ 4520 if (p1 == NULL || p2 == NULL) 4521 return (p1 == p2); 4522 4523 while (bits >= 8) { 4524 if (*p1++ != *p2++) 4525 return 0; 4526 bits -= 8; 4527 } 4528 4529 if (bits > 0) { 4530 u_int8_t mask = ~((1<<(8-bits))-1); 4531 if ((*p1 & mask) != (*p2 & mask)) 4532 return 0; 4533 } 4534 return 1; /* Match! */ 4535 } 4536 4537 /* 4538 * time handler. 4539 * scanning SPD and SAD to check status for each entries, 4540 * and do to remove or to expire. 4541 */ 4542 void 4543 key_timehandler(void* arg) 4544 { 4545 u_int dir; 4546 int s; 4547 time_t now = time_uptime; 4548 4549 s = splsoftnet(); /*called from softclock()*/ 4550 mutex_enter(softnet_lock); 4551 4552 /* SPD */ 4553 { 4554 struct secpolicy *sp, *nextsp; 4555 4556 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4557 for (sp = LIST_FIRST(&sptree[dir]); 4558 sp != NULL; 4559 sp = nextsp) { 4560 4561 nextsp = LIST_NEXT(sp, chain); 4562 4563 if (sp->state == IPSEC_SPSTATE_DEAD) { 4564 key_sp_unlink(sp); /*XXX*/ 4565 4566 /* 'sp' dead; continue transfers to 4567 * 'sp = nextsp' 4568 */ 4569 continue; 4570 } 4571 4572 if (sp->lifetime == 0 && sp->validtime == 0) 4573 continue; 4574 4575 /* the deletion will occur next time */ 4576 if ((sp->lifetime && now - sp->created > sp->lifetime) 4577 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4578 key_sp_dead(sp); 4579 key_spdexpire(sp); 4580 continue; 4581 } 4582 } 4583 } 4584 } 4585 4586 /* SAD */ 4587 { 4588 struct secashead *sah, *nextsah; 4589 struct secasvar *sav, *nextsav; 4590 4591 for (sah = LIST_FIRST(&sahtree); 4592 sah != NULL; 4593 sah = nextsah) { 4594 4595 nextsah = LIST_NEXT(sah, chain); 4596 4597 /* if sah has been dead, then delete it and process next sah. */ 4598 if (sah->state == SADB_SASTATE_DEAD) { 4599 key_delsah(sah); 4600 continue; 4601 } 4602 4603 /* if LARVAL entry doesn't become MATURE, delete it. */ 4604 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4605 sav != NULL; 4606 sav = nextsav) { 4607 4608 nextsav = LIST_NEXT(sav, chain); 4609 4610 if (now - sav->created > key_larval_lifetime) { 4611 KEY_FREESAV(&sav); 4612 } 4613 } 4614 4615 /* 4616 * check MATURE entry to start to send expire message 4617 * whether or not. 4618 */ 4619 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4620 sav != NULL; 4621 sav = nextsav) { 4622 4623 nextsav = LIST_NEXT(sav, chain); 4624 4625 /* we don't need to check. */ 4626 if (sav->lft_s == NULL) 4627 continue; 4628 4629 /* sanity check */ 4630 if (sav->lft_c == NULL) { 4631 ipseclog((LOG_DEBUG,"key_timehandler: " 4632 "There is no CURRENT time, why?\n")); 4633 continue; 4634 } 4635 4636 /* check SOFT lifetime */ 4637 if (sav->lft_s->sadb_lifetime_addtime != 0 4638 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4639 /* 4640 * check SA to be used whether or not. 4641 * when SA hasn't been used, delete it. 4642 */ 4643 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4644 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4645 KEY_FREESAV(&sav); 4646 } else { 4647 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4648 /* 4649 * XXX If we keep to send expire 4650 * message in the status of 4651 * DYING. Do remove below code. 4652 */ 4653 key_expire(sav); 4654 } 4655 } 4656 /* check SOFT lifetime by bytes */ 4657 /* 4658 * XXX I don't know the way to delete this SA 4659 * when new SA is installed. Caution when it's 4660 * installed too big lifetime by time. 4661 */ 4662 else if (sav->lft_s->sadb_lifetime_bytes != 0 4663 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4664 4665 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4666 /* 4667 * XXX If we keep to send expire 4668 * message in the status of 4669 * DYING. Do remove below code. 4670 */ 4671 key_expire(sav); 4672 } 4673 } 4674 4675 /* check DYING entry to change status to DEAD. */ 4676 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4677 sav != NULL; 4678 sav = nextsav) { 4679 4680 nextsav = LIST_NEXT(sav, chain); 4681 4682 /* we don't need to check. */ 4683 if (sav->lft_h == NULL) 4684 continue; 4685 4686 /* sanity check */ 4687 if (sav->lft_c == NULL) { 4688 ipseclog((LOG_DEBUG, "key_timehandler: " 4689 "There is no CURRENT time, why?\n")); 4690 continue; 4691 } 4692 4693 if (sav->lft_h->sadb_lifetime_addtime != 0 4694 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4695 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4696 KEY_FREESAV(&sav); 4697 } 4698 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4699 else if (sav->lft_s != NULL 4700 && sav->lft_s->sadb_lifetime_addtime != 0 4701 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4702 /* 4703 * XXX: should be checked to be 4704 * installed the valid SA. 4705 */ 4706 4707 /* 4708 * If there is no SA then sending 4709 * expire message. 4710 */ 4711 key_expire(sav); 4712 } 4713 #endif 4714 /* check HARD lifetime by bytes */ 4715 else if (sav->lft_h->sadb_lifetime_bytes != 0 4716 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4717 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4718 KEY_FREESAV(&sav); 4719 } 4720 } 4721 4722 /* delete entry in DEAD */ 4723 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4724 sav != NULL; 4725 sav = nextsav) { 4726 4727 nextsav = LIST_NEXT(sav, chain); 4728 4729 /* sanity check */ 4730 if (sav->state != SADB_SASTATE_DEAD) { 4731 ipseclog((LOG_DEBUG, "key_timehandler: " 4732 "invalid sav->state " 4733 "(queue: %d SA: %d): " 4734 "kill it anyway\n", 4735 SADB_SASTATE_DEAD, sav->state)); 4736 } 4737 4738 /* 4739 * do not call key_freesav() here. 4740 * sav should already be freed, and sav->refcnt 4741 * shows other references to sav 4742 * (such as from SPD). 4743 */ 4744 } 4745 } 4746 } 4747 4748 #ifndef IPSEC_NONBLOCK_ACQUIRE 4749 /* ACQ tree */ 4750 { 4751 struct secacq *acq, *nextacq; 4752 4753 for (acq = LIST_FIRST(&acqtree); 4754 acq != NULL; 4755 acq = nextacq) { 4756 4757 nextacq = LIST_NEXT(acq, chain); 4758 4759 if (now - acq->created > key_blockacq_lifetime 4760 && __LIST_CHAINED(acq)) { 4761 LIST_REMOVE(acq, chain); 4762 KFREE(acq); 4763 } 4764 } 4765 } 4766 #endif 4767 4768 /* SP ACQ tree */ 4769 { 4770 struct secspacq *acq, *nextacq; 4771 4772 for (acq = LIST_FIRST(&spacqtree); 4773 acq != NULL; 4774 acq = nextacq) { 4775 4776 nextacq = LIST_NEXT(acq, chain); 4777 4778 if (now - acq->created > key_blockacq_lifetime 4779 && __LIST_CHAINED(acq)) { 4780 LIST_REMOVE(acq, chain); 4781 KFREE(acq); 4782 } 4783 } 4784 } 4785 4786 #ifndef IPSEC_DEBUG2 4787 /* do exchange to tick time !! */ 4788 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4789 #endif /* IPSEC_DEBUG2 */ 4790 4791 mutex_exit(softnet_lock); 4792 splx(s); 4793 return; 4794 } 4795 4796 u_long 4797 key_random(void) 4798 { 4799 u_long value; 4800 4801 key_randomfill(&value, sizeof(value)); 4802 return value; 4803 } 4804 4805 void 4806 key_randomfill(void *p, size_t l) 4807 { 4808 4809 cprng_fast(p, l); 4810 } 4811 4812 /* 4813 * map SADB_SATYPE_* to IPPROTO_*. 4814 * if satype == SADB_SATYPE then satype is mapped to ~0. 4815 * OUT: 4816 * 0: invalid satype. 4817 */ 4818 static u_int16_t 4819 key_satype2proto(u_int8_t satype) 4820 { 4821 switch (satype) { 4822 case SADB_SATYPE_UNSPEC: 4823 return IPSEC_PROTO_ANY; 4824 case SADB_SATYPE_AH: 4825 return IPPROTO_AH; 4826 case SADB_SATYPE_ESP: 4827 return IPPROTO_ESP; 4828 case SADB_X_SATYPE_IPCOMP: 4829 return IPPROTO_IPCOMP; 4830 case SADB_X_SATYPE_TCPSIGNATURE: 4831 return IPPROTO_TCP; 4832 default: 4833 return 0; 4834 } 4835 /* NOTREACHED */ 4836 } 4837 4838 /* 4839 * map IPPROTO_* to SADB_SATYPE_* 4840 * OUT: 4841 * 0: invalid protocol type. 4842 */ 4843 static u_int8_t 4844 key_proto2satype(u_int16_t proto) 4845 { 4846 switch (proto) { 4847 case IPPROTO_AH: 4848 return SADB_SATYPE_AH; 4849 case IPPROTO_ESP: 4850 return SADB_SATYPE_ESP; 4851 case IPPROTO_IPCOMP: 4852 return SADB_X_SATYPE_IPCOMP; 4853 case IPPROTO_TCP: 4854 return SADB_X_SATYPE_TCPSIGNATURE; 4855 default: 4856 return 0; 4857 } 4858 /* NOTREACHED */ 4859 } 4860 4861 static int 4862 key_setsecasidx(int proto, int mode, int reqid, 4863 const struct sadb_address * src, 4864 const struct sadb_address * dst, 4865 struct secasindex * saidx) 4866 { 4867 const union sockaddr_union * src_u = 4868 (const union sockaddr_union *) src; 4869 const union sockaddr_union * dst_u = 4870 (const union sockaddr_union *) dst; 4871 4872 /* sa len safety check */ 4873 if (key_checksalen(src_u) != 0) 4874 return -1; 4875 if (key_checksalen(dst_u) != 0) 4876 return -1; 4877 4878 memset(saidx, 0, sizeof(*saidx)); 4879 saidx->proto = proto; 4880 saidx->mode = mode; 4881 saidx->reqid = reqid; 4882 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4883 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4884 4885 key_porttosaddr(&((saidx)->src),0); 4886 key_porttosaddr(&((saidx)->dst),0); 4887 return 0; 4888 } 4889 4890 /* %%% PF_KEY */ 4891 /* 4892 * SADB_GETSPI processing is to receive 4893 * <base, (SA2), src address, dst address, (SPI range)> 4894 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4895 * tree with the status of LARVAL, and send 4896 * <base, SA(*), address(SD)> 4897 * to the IKMPd. 4898 * 4899 * IN: mhp: pointer to the pointer to each header. 4900 * OUT: NULL if fail. 4901 * other if success, return pointer to the message to send. 4902 */ 4903 static int 4904 key_getspi(struct socket *so, struct mbuf *m, 4905 const struct sadb_msghdr *mhp) 4906 { 4907 struct sadb_address *src0, *dst0; 4908 struct secasindex saidx; 4909 struct secashead *newsah; 4910 struct secasvar *newsav; 4911 u_int8_t proto; 4912 u_int32_t spi; 4913 u_int8_t mode; 4914 u_int16_t reqid; 4915 int error; 4916 4917 KASSERT(so != NULL); 4918 KASSERT(m != NULL); 4919 KASSERT(mhp != NULL); 4920 KASSERT(mhp->msg != NULL); 4921 4922 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4923 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4924 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4925 return key_senderror(so, m, EINVAL); 4926 } 4927 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4928 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4929 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4930 return key_senderror(so, m, EINVAL); 4931 } 4932 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4933 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4934 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4935 } else { 4936 mode = IPSEC_MODE_ANY; 4937 reqid = 0; 4938 } 4939 4940 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4941 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4942 4943 /* map satype to proto */ 4944 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4945 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4946 return key_senderror(so, m, EINVAL); 4947 } 4948 4949 4950 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 4951 dst0 + 1, &saidx)) != 0) 4952 return key_senderror(so, m, EINVAL); 4953 4954 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 4955 return key_senderror(so, m, EINVAL); 4956 4957 /* SPI allocation */ 4958 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4959 &saidx); 4960 if (spi == 0) 4961 return key_senderror(so, m, EINVAL); 4962 4963 /* get a SA index */ 4964 if ((newsah = key_getsah(&saidx)) == NULL) { 4965 /* create a new SA index */ 4966 if ((newsah = key_newsah(&saidx)) == NULL) { 4967 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4968 return key_senderror(so, m, ENOBUFS); 4969 } 4970 } 4971 4972 /* get a new SA */ 4973 /* XXX rewrite */ 4974 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4975 if (newsav == NULL) { 4976 /* XXX don't free new SA index allocated in above. */ 4977 return key_senderror(so, m, error); 4978 } 4979 4980 /* set spi */ 4981 newsav->spi = htonl(spi); 4982 4983 #ifndef IPSEC_NONBLOCK_ACQUIRE 4984 /* delete the entry in acqtree */ 4985 if (mhp->msg->sadb_msg_seq != 0) { 4986 struct secacq *acq; 4987 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4988 /* reset counter in order to deletion by timehandler. */ 4989 acq->created = time_uptime; 4990 acq->count = 0; 4991 } 4992 } 4993 #endif 4994 4995 { 4996 struct mbuf *n, *nn; 4997 struct sadb_sa *m_sa; 4998 struct sadb_msg *newmsg; 4999 int off, len; 5000 5001 /* create new sadb_msg to reply. */ 5002 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 5003 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5004 if (len > MCLBYTES) 5005 return key_senderror(so, m, ENOBUFS); 5006 5007 MGETHDR(n, M_DONTWAIT, MT_DATA); 5008 if (len > MHLEN) { 5009 MCLGET(n, M_DONTWAIT); 5010 if ((n->m_flags & M_EXT) == 0) { 5011 m_freem(n); 5012 n = NULL; 5013 } 5014 } 5015 if (!n) 5016 return key_senderror(so, m, ENOBUFS); 5017 5018 n->m_len = len; 5019 n->m_next = NULL; 5020 off = 0; 5021 5022 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 5023 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 5024 5025 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 5026 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 5027 m_sa->sadb_sa_exttype = SADB_EXT_SA; 5028 m_sa->sadb_sa_spi = htonl(spi); 5029 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5030 5031 KASSERTMSG(off == len, "length inconsistency"); 5032 5033 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 5034 SADB_EXT_ADDRESS_DST); 5035 if (!n->m_next) { 5036 m_freem(n); 5037 return key_senderror(so, m, ENOBUFS); 5038 } 5039 5040 if (n->m_len < sizeof(struct sadb_msg)) { 5041 n = m_pullup(n, sizeof(struct sadb_msg)); 5042 if (n == NULL) 5043 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 5044 } 5045 5046 n->m_pkthdr.len = 0; 5047 for (nn = n; nn; nn = nn->m_next) 5048 n->m_pkthdr.len += nn->m_len; 5049 5050 newmsg = mtod(n, struct sadb_msg *); 5051 newmsg->sadb_msg_seq = newsav->seq; 5052 newmsg->sadb_msg_errno = 0; 5053 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5054 5055 m_freem(m); 5056 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5057 } 5058 } 5059 5060 /* 5061 * allocating new SPI 5062 * called by key_getspi(). 5063 * OUT: 5064 * 0: failure. 5065 * others: success. 5066 */ 5067 static u_int32_t 5068 key_do_getnewspi(const struct sadb_spirange *spirange, 5069 const struct secasindex *saidx) 5070 { 5071 u_int32_t newspi; 5072 u_int32_t spmin, spmax; 5073 int count = key_spi_trycnt; 5074 5075 /* set spi range to allocate */ 5076 if (spirange != NULL) { 5077 spmin = spirange->sadb_spirange_min; 5078 spmax = spirange->sadb_spirange_max; 5079 } else { 5080 spmin = key_spi_minval; 5081 spmax = key_spi_maxval; 5082 } 5083 /* IPCOMP needs 2-byte SPI */ 5084 if (saidx->proto == IPPROTO_IPCOMP) { 5085 u_int32_t t; 5086 if (spmin >= 0x10000) 5087 spmin = 0xffff; 5088 if (spmax >= 0x10000) 5089 spmax = 0xffff; 5090 if (spmin > spmax) { 5091 t = spmin; spmin = spmax; spmax = t; 5092 } 5093 } 5094 5095 if (spmin == spmax) { 5096 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5097 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 5098 return 0; 5099 } 5100 5101 count--; /* taking one cost. */ 5102 newspi = spmin; 5103 5104 } else { 5105 5106 /* init SPI */ 5107 newspi = 0; 5108 5109 /* when requesting to allocate spi ranged */ 5110 while (count--) { 5111 /* generate pseudo-random SPI value ranged. */ 5112 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5113 5114 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5115 break; 5116 } 5117 5118 if (count == 0 || newspi == 0) { 5119 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 5120 return 0; 5121 } 5122 } 5123 5124 /* statistics */ 5125 keystat.getspi_count = 5126 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5127 5128 return newspi; 5129 } 5130 5131 static int 5132 key_handle_natt_info(struct secasvar *sav, 5133 const struct sadb_msghdr *mhp) 5134 { 5135 const char *msg = "?" ; 5136 struct sadb_x_nat_t_type *type; 5137 struct sadb_x_nat_t_port *sport, *dport; 5138 struct sadb_address *iaddr, *raddr; 5139 struct sadb_x_nat_t_frag *frag; 5140 5141 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5142 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5143 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5144 return 0; 5145 5146 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5147 msg = "TYPE"; 5148 goto bad; 5149 } 5150 5151 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5152 msg = "SPORT"; 5153 goto bad; 5154 } 5155 5156 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5157 msg = "DPORT"; 5158 goto bad; 5159 } 5160 5161 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5162 ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n", __func__)); 5163 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5164 msg = "OAI"; 5165 goto bad; 5166 } 5167 } 5168 5169 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5170 ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n", __func__)); 5171 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5172 msg = "OAR"; 5173 goto bad; 5174 } 5175 } 5176 5177 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5178 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5179 msg = "FRAG"; 5180 goto bad; 5181 } 5182 } 5183 5184 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5185 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5186 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5187 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5188 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5189 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5190 5191 ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n", 5192 __func__, type->sadb_x_nat_t_type_type, 5193 ntohs(sport->sadb_x_nat_t_port_port), 5194 ntohs(dport->sadb_x_nat_t_port_port))); 5195 5196 sav->natt_type = type->sadb_x_nat_t_type_type; 5197 key_porttosaddr(&sav->sah->saidx.src, 5198 sport->sadb_x_nat_t_port_port); 5199 key_porttosaddr(&sav->sah->saidx.dst, 5200 dport->sadb_x_nat_t_port_port); 5201 if (frag) 5202 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5203 else 5204 sav->esp_frag = IP_MAXPACKET; 5205 5206 return 0; 5207 bad: 5208 ipseclog((LOG_DEBUG, "%s: invalid message %s\n", __func__, msg)); 5209 __USE(msg); 5210 return -1; 5211 } 5212 5213 /* Just update the IPSEC_NAT_T ports if present */ 5214 static int 5215 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5216 const struct sadb_msghdr *mhp) 5217 { 5218 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5219 ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n", __func__)); 5220 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5221 ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n", __func__)); 5222 5223 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5224 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5225 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5226 struct sadb_x_nat_t_type *type; 5227 struct sadb_x_nat_t_port *sport; 5228 struct sadb_x_nat_t_port *dport; 5229 5230 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5231 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5232 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5233 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5234 __func__)); 5235 return -1; 5236 } 5237 5238 type = (struct sadb_x_nat_t_type *) 5239 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5240 sport = (struct sadb_x_nat_t_port *) 5241 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5242 dport = (struct sadb_x_nat_t_port *) 5243 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5244 5245 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5246 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5247 5248 ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n", 5249 __func__, type->sadb_x_nat_t_type_type, 5250 ntohs(sport->sadb_x_nat_t_port_port), 5251 ntohs(dport->sadb_x_nat_t_port_port))); 5252 } 5253 5254 return 0; 5255 } 5256 5257 5258 /* 5259 * SADB_UPDATE processing 5260 * receive 5261 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5262 * key(AE), (identity(SD),) (sensitivity)> 5263 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5264 * and send 5265 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5266 * (identity(SD),) (sensitivity)> 5267 * to the ikmpd. 5268 * 5269 * m will always be freed. 5270 */ 5271 static int 5272 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5273 { 5274 struct sadb_sa *sa0; 5275 struct sadb_address *src0, *dst0; 5276 struct secasindex saidx; 5277 struct secashead *sah; 5278 struct secasvar *sav; 5279 u_int16_t proto; 5280 u_int8_t mode; 5281 u_int16_t reqid; 5282 int error; 5283 5284 KASSERT(so != NULL); 5285 KASSERT(m != NULL); 5286 KASSERT(mhp != NULL); 5287 KASSERT(mhp->msg != NULL); 5288 5289 /* map satype to proto */ 5290 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5291 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 5292 return key_senderror(so, m, EINVAL); 5293 } 5294 5295 if (mhp->ext[SADB_EXT_SA] == NULL || 5296 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5297 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5298 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5299 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5300 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5301 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5302 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5303 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5304 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5305 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5306 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5307 return key_senderror(so, m, EINVAL); 5308 } 5309 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5310 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5311 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5312 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5313 return key_senderror(so, m, EINVAL); 5314 } 5315 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5316 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5317 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5318 } else { 5319 mode = IPSEC_MODE_ANY; 5320 reqid = 0; 5321 } 5322 /* XXX boundary checking for other extensions */ 5323 5324 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5325 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5326 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5327 5328 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5329 dst0 + 1, &saidx)) != 0) 5330 return key_senderror(so, m, EINVAL); 5331 5332 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5333 return key_senderror(so, m, EINVAL); 5334 5335 /* get a SA header */ 5336 if ((sah = key_getsah(&saidx)) == NULL) { 5337 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 5338 return key_senderror(so, m, ENOENT); 5339 } 5340 5341 /* set spidx if there */ 5342 /* XXX rewrite */ 5343 error = key_setident(sah, m, mhp); 5344 if (error) 5345 return key_senderror(so, m, error); 5346 5347 /* find a SA with sequence number. */ 5348 #ifdef IPSEC_DOSEQCHECK 5349 if (mhp->msg->sadb_msg_seq != 0 5350 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5351 ipseclog((LOG_DEBUG, 5352 "key_update: no larval SA with sequence %u exists.\n", 5353 mhp->msg->sadb_msg_seq)); 5354 return key_senderror(so, m, ENOENT); 5355 } 5356 #else 5357 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 5358 ipseclog((LOG_DEBUG, 5359 "key_update: no such a SA found (spi:%u)\n", 5360 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5361 return key_senderror(so, m, EINVAL); 5362 } 5363 #endif 5364 5365 /* validity check */ 5366 if (sav->sah->saidx.proto != proto) { 5367 ipseclog((LOG_DEBUG, 5368 "key_update: protocol mismatched (DB=%u param=%u)\n", 5369 sav->sah->saidx.proto, proto)); 5370 return key_senderror(so, m, EINVAL); 5371 } 5372 #ifdef IPSEC_DOSEQCHECK 5373 if (sav->spi != sa0->sadb_sa_spi) { 5374 ipseclog((LOG_DEBUG, 5375 "key_update: SPI mismatched (DB:%u param:%u)\n", 5376 (u_int32_t)ntohl(sav->spi), 5377 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5378 return key_senderror(so, m, EINVAL); 5379 } 5380 #endif 5381 if (sav->pid != mhp->msg->sadb_msg_pid) { 5382 ipseclog((LOG_DEBUG, 5383 "key_update: pid mismatched (DB:%u param:%u)\n", 5384 sav->pid, mhp->msg->sadb_msg_pid)); 5385 return key_senderror(so, m, EINVAL); 5386 } 5387 5388 /* copy sav values */ 5389 error = key_setsaval(sav, m, mhp); 5390 if (error) { 5391 KEY_FREESAV(&sav); 5392 return key_senderror(so, m, error); 5393 } 5394 5395 if ((error = key_handle_natt_info(sav,mhp)) != 0) 5396 return key_senderror(so, m, EINVAL); 5397 5398 /* check SA values to be mature. */ 5399 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5400 KEY_FREESAV(&sav); 5401 return key_senderror(so, m, 0); 5402 } 5403 5404 { 5405 struct mbuf *n; 5406 5407 /* set msg buf from mhp */ 5408 n = key_getmsgbuf_x1(m, mhp); 5409 if (n == NULL) { 5410 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5411 return key_senderror(so, m, ENOBUFS); 5412 } 5413 5414 m_freem(m); 5415 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5416 } 5417 } 5418 5419 /* 5420 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5421 * only called by key_update(). 5422 * OUT: 5423 * NULL : not found 5424 * others : found, pointer to a SA. 5425 */ 5426 #ifdef IPSEC_DOSEQCHECK 5427 static struct secasvar * 5428 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5429 { 5430 struct secasvar *sav; 5431 u_int state; 5432 5433 state = SADB_SASTATE_LARVAL; 5434 5435 /* search SAD with sequence number ? */ 5436 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5437 5438 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5439 5440 if (sav->seq == seq) { 5441 SA_ADDREF(sav); 5442 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5443 "DP cause refcnt++:%d SA:%p\n", 5444 sav->refcnt, sav); 5445 return sav; 5446 } 5447 } 5448 5449 return NULL; 5450 } 5451 #endif 5452 5453 /* 5454 * SADB_ADD processing 5455 * add an entry to SA database, when received 5456 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5457 * key(AE), (identity(SD),) (sensitivity)> 5458 * from the ikmpd, 5459 * and send 5460 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5461 * (identity(SD),) (sensitivity)> 5462 * to the ikmpd. 5463 * 5464 * IGNORE identity and sensitivity messages. 5465 * 5466 * m will always be freed. 5467 */ 5468 static int 5469 key_add(struct socket *so, struct mbuf *m, 5470 const struct sadb_msghdr *mhp) 5471 { 5472 struct sadb_sa *sa0; 5473 struct sadb_address *src0, *dst0; 5474 struct secasindex saidx; 5475 struct secashead *newsah; 5476 struct secasvar *newsav; 5477 u_int16_t proto; 5478 u_int8_t mode; 5479 u_int16_t reqid; 5480 int error; 5481 5482 KASSERT(so != NULL); 5483 KASSERT(m != NULL); 5484 KASSERT(mhp != NULL); 5485 KASSERT(mhp->msg != NULL); 5486 5487 /* map satype to proto */ 5488 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5489 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5490 return key_senderror(so, m, EINVAL); 5491 } 5492 5493 if (mhp->ext[SADB_EXT_SA] == NULL || 5494 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5495 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5496 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5497 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5498 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5499 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5500 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5501 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5502 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5503 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5504 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5505 return key_senderror(so, m, EINVAL); 5506 } 5507 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5508 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5509 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5510 /* XXX need more */ 5511 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5512 return key_senderror(so, m, EINVAL); 5513 } 5514 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5515 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5516 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5517 } else { 5518 mode = IPSEC_MODE_ANY; 5519 reqid = 0; 5520 } 5521 5522 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5523 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5524 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5525 5526 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5527 dst0 + 1, &saidx)) != 0) 5528 return key_senderror(so, m, EINVAL); 5529 5530 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5531 return key_senderror(so, m, EINVAL); 5532 5533 /* get a SA header */ 5534 if ((newsah = key_getsah(&saidx)) == NULL) { 5535 /* create a new SA header */ 5536 if ((newsah = key_newsah(&saidx)) == NULL) { 5537 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5538 return key_senderror(so, m, ENOBUFS); 5539 } 5540 } 5541 5542 /* set spidx if there */ 5543 /* XXX rewrite */ 5544 error = key_setident(newsah, m, mhp); 5545 if (error) { 5546 return key_senderror(so, m, error); 5547 } 5548 5549 /* create new SA entry. */ 5550 /* We can create new SA only if SPI is differenct. */ 5551 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5552 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5553 return key_senderror(so, m, EEXIST); 5554 } 5555 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5556 if (newsav == NULL) { 5557 return key_senderror(so, m, error); 5558 } 5559 5560 if ((error = key_handle_natt_info(newsav, mhp)) != 0) 5561 return key_senderror(so, m, EINVAL); 5562 5563 /* check SA values to be mature. */ 5564 if ((error = key_mature(newsav)) != 0) { 5565 KEY_FREESAV(&newsav); 5566 return key_senderror(so, m, error); 5567 } 5568 5569 /* 5570 * don't call key_freesav() here, as we would like to keep the SA 5571 * in the database on success. 5572 */ 5573 5574 { 5575 struct mbuf *n; 5576 5577 /* set msg buf from mhp */ 5578 n = key_getmsgbuf_x1(m, mhp); 5579 if (n == NULL) { 5580 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5581 return key_senderror(so, m, ENOBUFS); 5582 } 5583 5584 m_freem(m); 5585 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5586 } 5587 } 5588 5589 /* m is retained */ 5590 static int 5591 key_setident(struct secashead *sah, struct mbuf *m, 5592 const struct sadb_msghdr *mhp) 5593 { 5594 const struct sadb_ident *idsrc, *iddst; 5595 int idsrclen, iddstlen; 5596 5597 KASSERT(sah != NULL); 5598 KASSERT(m != NULL); 5599 KASSERT(mhp != NULL); 5600 KASSERT(mhp->msg != NULL); 5601 5602 /* don't make buffer if not there */ 5603 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5604 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5605 sah->idents = NULL; 5606 sah->identd = NULL; 5607 return 0; 5608 } 5609 5610 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5611 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5612 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5613 return EINVAL; 5614 } 5615 5616 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5617 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5618 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5619 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5620 5621 /* validity check */ 5622 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5623 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5624 return EINVAL; 5625 } 5626 5627 switch (idsrc->sadb_ident_type) { 5628 case SADB_IDENTTYPE_PREFIX: 5629 case SADB_IDENTTYPE_FQDN: 5630 case SADB_IDENTTYPE_USERFQDN: 5631 default: 5632 /* XXX do nothing */ 5633 sah->idents = NULL; 5634 sah->identd = NULL; 5635 return 0; 5636 } 5637 5638 /* make structure */ 5639 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5640 if (sah->idents == NULL) { 5641 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5642 return ENOBUFS; 5643 } 5644 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5645 if (sah->identd == NULL) { 5646 KFREE(sah->idents); 5647 sah->idents = NULL; 5648 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5649 return ENOBUFS; 5650 } 5651 memcpy(sah->idents, idsrc, idsrclen); 5652 memcpy(sah->identd, iddst, iddstlen); 5653 5654 return 0; 5655 } 5656 5657 /* 5658 * m will not be freed on return. 5659 * it is caller's responsibility to free the result. 5660 */ 5661 static struct mbuf * 5662 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5663 { 5664 struct mbuf *n; 5665 5666 KASSERT(m != NULL); 5667 KASSERT(mhp != NULL); 5668 KASSERT(mhp->msg != NULL); 5669 5670 /* create new sadb_msg to reply. */ 5671 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5672 SADB_EXT_SA, SADB_X_EXT_SA2, 5673 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5674 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5675 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5676 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5677 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5678 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5679 if (!n) 5680 return NULL; 5681 5682 if (n->m_len < sizeof(struct sadb_msg)) { 5683 n = m_pullup(n, sizeof(struct sadb_msg)); 5684 if (n == NULL) 5685 return NULL; 5686 } 5687 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5688 mtod(n, struct sadb_msg *)->sadb_msg_len = 5689 PFKEY_UNIT64(n->m_pkthdr.len); 5690 5691 return n; 5692 } 5693 5694 static int key_delete_all (struct socket *, struct mbuf *, 5695 const struct sadb_msghdr *, u_int16_t); 5696 5697 /* 5698 * SADB_DELETE processing 5699 * receive 5700 * <base, SA(*), address(SD)> 5701 * from the ikmpd, and set SADB_SASTATE_DEAD, 5702 * and send, 5703 * <base, SA(*), address(SD)> 5704 * to the ikmpd. 5705 * 5706 * m will always be freed. 5707 */ 5708 static int 5709 key_delete(struct socket *so, struct mbuf *m, 5710 const struct sadb_msghdr *mhp) 5711 { 5712 struct sadb_sa *sa0; 5713 struct sadb_address *src0, *dst0; 5714 struct secasindex saidx; 5715 struct secashead *sah; 5716 struct secasvar *sav = NULL; 5717 u_int16_t proto; 5718 int error; 5719 5720 KASSERT(so != NULL); 5721 KASSERT(m != NULL); 5722 KASSERT(mhp != NULL); 5723 KASSERT(mhp->msg != NULL); 5724 5725 /* map satype to proto */ 5726 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5727 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5728 return key_senderror(so, m, EINVAL); 5729 } 5730 5731 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5732 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5733 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5734 return key_senderror(so, m, EINVAL); 5735 } 5736 5737 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5738 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5739 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5740 return key_senderror(so, m, EINVAL); 5741 } 5742 5743 if (mhp->ext[SADB_EXT_SA] == NULL) { 5744 /* 5745 * Caller wants us to delete all non-LARVAL SAs 5746 * that match the src/dst. This is used during 5747 * IKE INITIAL-CONTACT. 5748 */ 5749 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5750 return key_delete_all(so, m, mhp, proto); 5751 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5752 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5753 return key_senderror(so, m, EINVAL); 5754 } 5755 5756 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5757 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5758 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5759 5760 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5761 dst0 + 1, &saidx)) != 0) 5762 return key_senderror(so, m, EINVAL); 5763 5764 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5765 return key_senderror(so, m, EINVAL); 5766 5767 /* get a SA header */ 5768 LIST_FOREACH(sah, &sahtree, chain) { 5769 if (sah->state == SADB_SASTATE_DEAD) 5770 continue; 5771 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5772 continue; 5773 5774 /* get a SA with SPI. */ 5775 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5776 if (sav) 5777 break; 5778 } 5779 if (sah == NULL) { 5780 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5781 return key_senderror(so, m, ENOENT); 5782 } 5783 5784 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5785 KEY_FREESAV(&sav); 5786 5787 { 5788 struct mbuf *n; 5789 struct sadb_msg *newmsg; 5790 5791 /* create new sadb_msg to reply. */ 5792 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5793 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5794 if (!n) 5795 return key_senderror(so, m, ENOBUFS); 5796 5797 if (n->m_len < sizeof(struct sadb_msg)) { 5798 n = m_pullup(n, sizeof(struct sadb_msg)); 5799 if (n == NULL) 5800 return key_senderror(so, m, ENOBUFS); 5801 } 5802 newmsg = mtod(n, struct sadb_msg *); 5803 newmsg->sadb_msg_errno = 0; 5804 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5805 5806 m_freem(m); 5807 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5808 } 5809 } 5810 5811 /* 5812 * delete all SAs for src/dst. Called from key_delete(). 5813 */ 5814 static int 5815 key_delete_all(struct socket *so, struct mbuf *m, 5816 const struct sadb_msghdr *mhp, u_int16_t proto) 5817 { 5818 struct sadb_address *src0, *dst0; 5819 struct secasindex saidx; 5820 struct secashead *sah; 5821 struct secasvar *sav, *nextsav; 5822 u_int stateidx, state; 5823 int error; 5824 5825 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5826 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5827 5828 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5829 dst0 + 1, &saidx)) != 0) 5830 return key_senderror(so, m, EINVAL); 5831 5832 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5833 return key_senderror(so, m, EINVAL); 5834 5835 LIST_FOREACH(sah, &sahtree, chain) { 5836 if (sah->state == SADB_SASTATE_DEAD) 5837 continue; 5838 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5839 continue; 5840 5841 /* Delete all non-LARVAL SAs. */ 5842 for (stateidx = 0; 5843 stateidx < _ARRAYLEN(saorder_state_alive); 5844 stateidx++) { 5845 state = saorder_state_alive[stateidx]; 5846 if (state == SADB_SASTATE_LARVAL) 5847 continue; 5848 for (sav = LIST_FIRST(&sah->savtree[state]); 5849 sav != NULL; sav = nextsav) { 5850 nextsav = LIST_NEXT(sav, chain); 5851 /* sanity check */ 5852 if (sav->state != state) { 5853 ipseclog((LOG_DEBUG, "key_delete_all: " 5854 "invalid sav->state " 5855 "(queue: %d SA: %d)\n", 5856 state, sav->state)); 5857 continue; 5858 } 5859 5860 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5861 KEY_FREESAV(&sav); 5862 } 5863 } 5864 } 5865 { 5866 struct mbuf *n; 5867 struct sadb_msg *newmsg; 5868 5869 /* create new sadb_msg to reply. */ 5870 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5871 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5872 if (!n) 5873 return key_senderror(so, m, ENOBUFS); 5874 5875 if (n->m_len < sizeof(struct sadb_msg)) { 5876 n = m_pullup(n, sizeof(struct sadb_msg)); 5877 if (n == NULL) 5878 return key_senderror(so, m, ENOBUFS); 5879 } 5880 newmsg = mtod(n, struct sadb_msg *); 5881 newmsg->sadb_msg_errno = 0; 5882 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5883 5884 m_freem(m); 5885 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5886 } 5887 } 5888 5889 /* 5890 * SADB_GET processing 5891 * receive 5892 * <base, SA(*), address(SD)> 5893 * from the ikmpd, and get a SP and a SA to respond, 5894 * and send, 5895 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5896 * (identity(SD),) (sensitivity)> 5897 * to the ikmpd. 5898 * 5899 * m will always be freed. 5900 */ 5901 static int 5902 key_get(struct socket *so, struct mbuf *m, 5903 const struct sadb_msghdr *mhp) 5904 { 5905 struct sadb_sa *sa0; 5906 struct sadb_address *src0, *dst0; 5907 struct secasindex saidx; 5908 struct secashead *sah; 5909 struct secasvar *sav = NULL; 5910 u_int16_t proto; 5911 int error; 5912 5913 KASSERT(so != NULL); 5914 KASSERT(m != NULL); 5915 KASSERT(mhp != NULL); 5916 KASSERT(mhp->msg != NULL); 5917 5918 /* map satype to proto */ 5919 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5920 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5921 return key_senderror(so, m, EINVAL); 5922 } 5923 5924 if (mhp->ext[SADB_EXT_SA] == NULL || 5925 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5926 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5927 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5928 return key_senderror(so, m, EINVAL); 5929 } 5930 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5931 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5932 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5933 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5934 return key_senderror(so, m, EINVAL); 5935 } 5936 5937 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5938 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5939 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5940 5941 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5942 dst0 + 1, &saidx)) != 0) 5943 return key_senderror(so, m, EINVAL); 5944 5945 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5946 return key_senderror(so, m, EINVAL); 5947 5948 /* get a SA header */ 5949 LIST_FOREACH(sah, &sahtree, chain) { 5950 if (sah->state == SADB_SASTATE_DEAD) 5951 continue; 5952 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5953 continue; 5954 5955 /* get a SA with SPI. */ 5956 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5957 if (sav) 5958 break; 5959 } 5960 if (sah == NULL) { 5961 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5962 return key_senderror(so, m, ENOENT); 5963 } 5964 5965 { 5966 struct mbuf *n; 5967 u_int8_t satype; 5968 5969 /* map proto to satype */ 5970 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5971 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5972 return key_senderror(so, m, EINVAL); 5973 } 5974 5975 /* create new sadb_msg to reply. */ 5976 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5977 mhp->msg->sadb_msg_pid); 5978 if (!n) 5979 return key_senderror(so, m, ENOBUFS); 5980 5981 m_freem(m); 5982 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5983 } 5984 } 5985 5986 /* XXX make it sysctl-configurable? */ 5987 static void 5988 key_getcomb_setlifetime(struct sadb_comb *comb) 5989 { 5990 5991 comb->sadb_comb_soft_allocations = 1; 5992 comb->sadb_comb_hard_allocations = 1; 5993 comb->sadb_comb_soft_bytes = 0; 5994 comb->sadb_comb_hard_bytes = 0; 5995 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5996 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5997 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5998 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5999 } 6000 6001 /* 6002 * XXX reorder combinations by preference 6003 * XXX no idea if the user wants ESP authentication or not 6004 */ 6005 static struct mbuf * 6006 key_getcomb_esp(void) 6007 { 6008 struct sadb_comb *comb; 6009 const struct enc_xform *algo; 6010 struct mbuf *result = NULL, *m, *n; 6011 int encmin; 6012 int i, off, o; 6013 int totlen; 6014 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6015 6016 m = NULL; 6017 for (i = 1; i <= SADB_EALG_MAX; i++) { 6018 algo = esp_algorithm_lookup(i); 6019 if (algo == NULL) 6020 continue; 6021 6022 /* discard algorithms with key size smaller than system min */ 6023 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 6024 continue; 6025 if (_BITS(algo->minkey) < ipsec_esp_keymin) 6026 encmin = ipsec_esp_keymin; 6027 else 6028 encmin = _BITS(algo->minkey); 6029 6030 if (ipsec_esp_auth) 6031 m = key_getcomb_ah(); 6032 else { 6033 KASSERTMSG(l <= MLEN, 6034 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6035 MGET(m, M_DONTWAIT, MT_DATA); 6036 if (m) { 6037 M_ALIGN(m, l); 6038 m->m_len = l; 6039 m->m_next = NULL; 6040 memset(mtod(m, void *), 0, m->m_len); 6041 } 6042 } 6043 if (!m) 6044 goto fail; 6045 6046 totlen = 0; 6047 for (n = m; n; n = n->m_next) 6048 totlen += n->m_len; 6049 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 6050 6051 for (off = 0; off < totlen; off += l) { 6052 n = m_pulldown(m, off, l, &o); 6053 if (!n) { 6054 /* m is already freed */ 6055 goto fail; 6056 } 6057 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6058 memset(comb, 0, sizeof(*comb)); 6059 key_getcomb_setlifetime(comb); 6060 comb->sadb_comb_encrypt = i; 6061 comb->sadb_comb_encrypt_minbits = encmin; 6062 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6063 } 6064 6065 if (!result) 6066 result = m; 6067 else 6068 m_cat(result, m); 6069 } 6070 6071 return result; 6072 6073 fail: 6074 if (result) 6075 m_freem(result); 6076 return NULL; 6077 } 6078 6079 static void 6080 key_getsizes_ah(const struct auth_hash *ah, int alg, 6081 u_int16_t* ksmin, u_int16_t* ksmax) 6082 { 6083 *ksmin = *ksmax = ah->keysize; 6084 if (ah->keysize == 0) { 6085 /* 6086 * Transform takes arbitrary key size but algorithm 6087 * key size is restricted. Enforce this here. 6088 */ 6089 switch (alg) { 6090 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6091 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6092 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 6093 default: 6094 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 6095 alg)); 6096 break; 6097 } 6098 } 6099 } 6100 6101 /* 6102 * XXX reorder combinations by preference 6103 */ 6104 static struct mbuf * 6105 key_getcomb_ah(void) 6106 { 6107 struct sadb_comb *comb; 6108 const struct auth_hash *algo; 6109 struct mbuf *m; 6110 u_int16_t minkeysize, maxkeysize; 6111 int i; 6112 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6113 6114 m = NULL; 6115 for (i = 1; i <= SADB_AALG_MAX; i++) { 6116 #if 1 6117 /* we prefer HMAC algorithms, not old algorithms */ 6118 if (i != SADB_AALG_SHA1HMAC && 6119 i != SADB_AALG_MD5HMAC && 6120 i != SADB_X_AALG_SHA2_256 && 6121 i != SADB_X_AALG_SHA2_384 && 6122 i != SADB_X_AALG_SHA2_512) 6123 continue; 6124 #endif 6125 algo = ah_algorithm_lookup(i); 6126 if (!algo) 6127 continue; 6128 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6129 /* discard algorithms with key size smaller than system min */ 6130 if (_BITS(minkeysize) < ipsec_ah_keymin) 6131 continue; 6132 6133 if (!m) { 6134 KASSERTMSG(l <= MLEN, 6135 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6136 MGET(m, M_DONTWAIT, MT_DATA); 6137 if (m) { 6138 M_ALIGN(m, l); 6139 m->m_len = l; 6140 m->m_next = NULL; 6141 } 6142 } else 6143 M_PREPEND(m, l, M_DONTWAIT); 6144 if (!m) 6145 return NULL; 6146 6147 comb = mtod(m, struct sadb_comb *); 6148 memset(comb, 0, sizeof(*comb)); 6149 key_getcomb_setlifetime(comb); 6150 comb->sadb_comb_auth = i; 6151 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6152 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6153 } 6154 6155 return m; 6156 } 6157 6158 /* 6159 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6160 * XXX reorder combinations by preference 6161 */ 6162 static struct mbuf * 6163 key_getcomb_ipcomp(void) 6164 { 6165 struct sadb_comb *comb; 6166 const struct comp_algo *algo; 6167 struct mbuf *m; 6168 int i; 6169 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6170 6171 m = NULL; 6172 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6173 algo = ipcomp_algorithm_lookup(i); 6174 if (!algo) 6175 continue; 6176 6177 if (!m) { 6178 KASSERTMSG(l <= MLEN, 6179 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6180 MGET(m, M_DONTWAIT, MT_DATA); 6181 if (m) { 6182 M_ALIGN(m, l); 6183 m->m_len = l; 6184 m->m_next = NULL; 6185 } 6186 } else 6187 M_PREPEND(m, l, M_DONTWAIT); 6188 if (!m) 6189 return NULL; 6190 6191 comb = mtod(m, struct sadb_comb *); 6192 memset(comb, 0, sizeof(*comb)); 6193 key_getcomb_setlifetime(comb); 6194 comb->sadb_comb_encrypt = i; 6195 /* what should we set into sadb_comb_*_{min,max}bits? */ 6196 } 6197 6198 return m; 6199 } 6200 6201 /* 6202 * XXX no way to pass mode (transport/tunnel) to userland 6203 * XXX replay checking? 6204 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6205 */ 6206 static struct mbuf * 6207 key_getprop(const struct secasindex *saidx) 6208 { 6209 struct sadb_prop *prop; 6210 struct mbuf *m, *n; 6211 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6212 int totlen; 6213 6214 switch (saidx->proto) { 6215 case IPPROTO_ESP: 6216 m = key_getcomb_esp(); 6217 break; 6218 case IPPROTO_AH: 6219 m = key_getcomb_ah(); 6220 break; 6221 case IPPROTO_IPCOMP: 6222 m = key_getcomb_ipcomp(); 6223 break; 6224 default: 6225 return NULL; 6226 } 6227 6228 if (!m) 6229 return NULL; 6230 M_PREPEND(m, l, M_DONTWAIT); 6231 if (!m) 6232 return NULL; 6233 6234 totlen = 0; 6235 for (n = m; n; n = n->m_next) 6236 totlen += n->m_len; 6237 6238 prop = mtod(m, struct sadb_prop *); 6239 memset(prop, 0, sizeof(*prop)); 6240 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6241 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6242 prop->sadb_prop_replay = 32; /* XXX */ 6243 6244 return m; 6245 } 6246 6247 /* 6248 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6249 * send 6250 * <base, SA, address(SD), (address(P)), x_policy, 6251 * (identity(SD),) (sensitivity,) proposal> 6252 * to KMD, and expect to receive 6253 * <base> with SADB_ACQUIRE if error occurred, 6254 * or 6255 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6256 * from KMD by PF_KEY. 6257 * 6258 * XXX x_policy is outside of RFC2367 (KAME extension). 6259 * XXX sensitivity is not supported. 6260 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6261 * see comment for key_getcomb_ipcomp(). 6262 * 6263 * OUT: 6264 * 0 : succeed 6265 * others: error number 6266 */ 6267 static int 6268 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6269 { 6270 struct mbuf *result = NULL, *m; 6271 #ifndef IPSEC_NONBLOCK_ACQUIRE 6272 struct secacq *newacq; 6273 #endif 6274 u_int8_t satype; 6275 int error = -1; 6276 u_int32_t seq; 6277 6278 /* sanity check */ 6279 KASSERT(saidx != NULL); 6280 satype = key_proto2satype(saidx->proto); 6281 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6282 6283 #ifndef IPSEC_NONBLOCK_ACQUIRE 6284 /* 6285 * We never do anything about acquirng SA. There is anather 6286 * solution that kernel blocks to send SADB_ACQUIRE message until 6287 * getting something message from IKEd. In later case, to be 6288 * managed with ACQUIRING list. 6289 */ 6290 /* Get an entry to check whether sending message or not. */ 6291 if ((newacq = key_getacq(saidx)) != NULL) { 6292 if (key_blockacq_count < newacq->count) { 6293 /* reset counter and do send message. */ 6294 newacq->count = 0; 6295 } else { 6296 /* increment counter and do nothing. */ 6297 newacq->count++; 6298 return 0; 6299 } 6300 } else { 6301 /* make new entry for blocking to send SADB_ACQUIRE. */ 6302 if ((newacq = key_newacq(saidx)) == NULL) 6303 return ENOBUFS; 6304 6305 /* add to acqtree */ 6306 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6307 } 6308 #endif 6309 6310 6311 #ifndef IPSEC_NONBLOCK_ACQUIRE 6312 seq = newacq->seq; 6313 #else 6314 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6315 #endif 6316 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6317 if (!m) { 6318 error = ENOBUFS; 6319 goto fail; 6320 } 6321 result = m; 6322 6323 /* set sadb_address for saidx's. */ 6324 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6325 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6326 if (!m) { 6327 error = ENOBUFS; 6328 goto fail; 6329 } 6330 m_cat(result, m); 6331 6332 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6333 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6334 if (!m) { 6335 error = ENOBUFS; 6336 goto fail; 6337 } 6338 m_cat(result, m); 6339 6340 /* XXX proxy address (optional) */ 6341 6342 /* set sadb_x_policy */ 6343 if (sp) { 6344 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6345 if (!m) { 6346 error = ENOBUFS; 6347 goto fail; 6348 } 6349 m_cat(result, m); 6350 } 6351 6352 /* XXX identity (optional) */ 6353 #if 0 6354 if (idexttype && fqdn) { 6355 /* create identity extension (FQDN) */ 6356 struct sadb_ident *id; 6357 int fqdnlen; 6358 6359 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6360 id = (struct sadb_ident *)p; 6361 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6362 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6363 id->sadb_ident_exttype = idexttype; 6364 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6365 memcpy(id + 1, fqdn, fqdnlen); 6366 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6367 } 6368 6369 if (idexttype) { 6370 /* create identity extension (USERFQDN) */ 6371 struct sadb_ident *id; 6372 int userfqdnlen; 6373 6374 if (userfqdn) { 6375 /* +1 for terminating-NUL */ 6376 userfqdnlen = strlen(userfqdn) + 1; 6377 } else 6378 userfqdnlen = 0; 6379 id = (struct sadb_ident *)p; 6380 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6381 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6382 id->sadb_ident_exttype = idexttype; 6383 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6384 /* XXX is it correct? */ 6385 if (curlwp) 6386 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6387 if (userfqdn && userfqdnlen) 6388 memcpy(id + 1, userfqdn, userfqdnlen); 6389 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6390 } 6391 #endif 6392 6393 /* XXX sensitivity (optional) */ 6394 6395 /* create proposal/combination extension */ 6396 m = key_getprop(saidx); 6397 #if 0 6398 /* 6399 * spec conformant: always attach proposal/combination extension, 6400 * the problem is that we have no way to attach it for ipcomp, 6401 * due to the way sadb_comb is declared in RFC2367. 6402 */ 6403 if (!m) { 6404 error = ENOBUFS; 6405 goto fail; 6406 } 6407 m_cat(result, m); 6408 #else 6409 /* 6410 * outside of spec; make proposal/combination extension optional. 6411 */ 6412 if (m) 6413 m_cat(result, m); 6414 #endif 6415 6416 if ((result->m_flags & M_PKTHDR) == 0) { 6417 error = EINVAL; 6418 goto fail; 6419 } 6420 6421 if (result->m_len < sizeof(struct sadb_msg)) { 6422 result = m_pullup(result, sizeof(struct sadb_msg)); 6423 if (result == NULL) { 6424 error = ENOBUFS; 6425 goto fail; 6426 } 6427 } 6428 6429 result->m_pkthdr.len = 0; 6430 for (m = result; m; m = m->m_next) 6431 result->m_pkthdr.len += m->m_len; 6432 6433 mtod(result, struct sadb_msg *)->sadb_msg_len = 6434 PFKEY_UNIT64(result->m_pkthdr.len); 6435 6436 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6437 6438 fail: 6439 if (result) 6440 m_freem(result); 6441 return error; 6442 } 6443 6444 #ifndef IPSEC_NONBLOCK_ACQUIRE 6445 static struct secacq * 6446 key_newacq(const struct secasindex *saidx) 6447 { 6448 struct secacq *newacq; 6449 6450 /* get new entry */ 6451 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6452 if (newacq == NULL) { 6453 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6454 return NULL; 6455 } 6456 memset(newacq, 0, sizeof(*newacq)); 6457 6458 /* copy secindex */ 6459 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6460 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6461 newacq->created = time_uptime; 6462 newacq->count = 0; 6463 6464 return newacq; 6465 } 6466 6467 static struct secacq * 6468 key_getacq(const struct secasindex *saidx) 6469 { 6470 struct secacq *acq; 6471 6472 LIST_FOREACH(acq, &acqtree, chain) { 6473 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6474 return acq; 6475 } 6476 6477 return NULL; 6478 } 6479 6480 static struct secacq * 6481 key_getacqbyseq(u_int32_t seq) 6482 { 6483 struct secacq *acq; 6484 6485 LIST_FOREACH(acq, &acqtree, chain) { 6486 if (acq->seq == seq) 6487 return acq; 6488 } 6489 6490 return NULL; 6491 } 6492 #endif 6493 6494 static struct secspacq * 6495 key_newspacq(const struct secpolicyindex *spidx) 6496 { 6497 struct secspacq *acq; 6498 6499 /* get new entry */ 6500 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6501 if (acq == NULL) { 6502 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6503 return NULL; 6504 } 6505 memset(acq, 0, sizeof(*acq)); 6506 6507 /* copy secindex */ 6508 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6509 acq->created = time_uptime; 6510 acq->count = 0; 6511 6512 return acq; 6513 } 6514 6515 static struct secspacq * 6516 key_getspacq(const struct secpolicyindex *spidx) 6517 { 6518 struct secspacq *acq; 6519 6520 LIST_FOREACH(acq, &spacqtree, chain) { 6521 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6522 return acq; 6523 } 6524 6525 return NULL; 6526 } 6527 6528 /* 6529 * SADB_ACQUIRE processing, 6530 * in first situation, is receiving 6531 * <base> 6532 * from the ikmpd, and clear sequence of its secasvar entry. 6533 * 6534 * In second situation, is receiving 6535 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6536 * from a user land process, and return 6537 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6538 * to the socket. 6539 * 6540 * m will always be freed. 6541 */ 6542 static int 6543 key_acquire2(struct socket *so, struct mbuf *m, 6544 const struct sadb_msghdr *mhp) 6545 { 6546 const struct sadb_address *src0, *dst0; 6547 struct secasindex saidx; 6548 struct secashead *sah; 6549 u_int16_t proto; 6550 int error; 6551 6552 KASSERT(so != NULL); 6553 KASSERT(m != NULL); 6554 KASSERT(mhp != NULL); 6555 KASSERT(mhp->msg != NULL); 6556 6557 /* 6558 * Error message from KMd. 6559 * We assume that if error was occurred in IKEd, the length of PFKEY 6560 * message is equal to the size of sadb_msg structure. 6561 * We do not raise error even if error occurred in this function. 6562 */ 6563 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6564 #ifndef IPSEC_NONBLOCK_ACQUIRE 6565 struct secacq *acq; 6566 6567 /* check sequence number */ 6568 if (mhp->msg->sadb_msg_seq == 0) { 6569 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6570 m_freem(m); 6571 return 0; 6572 } 6573 6574 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6575 /* 6576 * the specified larval SA is already gone, or we got 6577 * a bogus sequence number. we can silently ignore it. 6578 */ 6579 m_freem(m); 6580 return 0; 6581 } 6582 6583 /* reset acq counter in order to deletion by timehander. */ 6584 acq->created = time_uptime; 6585 acq->count = 0; 6586 #endif 6587 m_freem(m); 6588 return 0; 6589 } 6590 6591 /* 6592 * This message is from user land. 6593 */ 6594 6595 /* map satype to proto */ 6596 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6597 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6598 return key_senderror(so, m, EINVAL); 6599 } 6600 6601 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6602 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6603 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6604 /* error */ 6605 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6606 return key_senderror(so, m, EINVAL); 6607 } 6608 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6609 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6610 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6611 /* error */ 6612 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6613 return key_senderror(so, m, EINVAL); 6614 } 6615 6616 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6617 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6618 6619 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 6620 dst0 + 1, &saidx)) != 0) 6621 return key_senderror(so, m, EINVAL); 6622 6623 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 6624 return key_senderror(so, m, EINVAL); 6625 6626 /* get a SA index */ 6627 LIST_FOREACH(sah, &sahtree, chain) { 6628 if (sah->state == SADB_SASTATE_DEAD) 6629 continue; 6630 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6631 break; 6632 } 6633 if (sah != NULL) { 6634 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6635 return key_senderror(so, m, EEXIST); 6636 } 6637 6638 error = key_acquire(&saidx, NULL); 6639 if (error != 0) { 6640 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6641 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6642 return key_senderror(so, m, error); 6643 } 6644 6645 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6646 } 6647 6648 /* 6649 * SADB_REGISTER processing. 6650 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6651 * receive 6652 * <base> 6653 * from the ikmpd, and register a socket to send PF_KEY messages, 6654 * and send 6655 * <base, supported> 6656 * to KMD by PF_KEY. 6657 * If socket is detached, must free from regnode. 6658 * 6659 * m will always be freed. 6660 */ 6661 static int 6662 key_register(struct socket *so, struct mbuf *m, 6663 const struct sadb_msghdr *mhp) 6664 { 6665 struct secreg *reg, *newreg = 0; 6666 6667 KASSERT(so != NULL); 6668 KASSERT(m != NULL); 6669 KASSERT(mhp != NULL); 6670 KASSERT(mhp->msg != NULL); 6671 6672 /* check for invalid register message */ 6673 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6674 return key_senderror(so, m, EINVAL); 6675 6676 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6677 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6678 goto setmsg; 6679 6680 /* check whether existing or not */ 6681 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6682 if (reg->so == so) { 6683 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6684 return key_senderror(so, m, EEXIST); 6685 } 6686 } 6687 6688 /* create regnode */ 6689 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6690 if (newreg == NULL) { 6691 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6692 return key_senderror(so, m, ENOBUFS); 6693 } 6694 memset(newreg, 0, sizeof(*newreg)); 6695 6696 newreg->so = so; 6697 ((struct keycb *)sotorawcb(so))->kp_registered++; 6698 6699 /* add regnode to regtree. */ 6700 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6701 6702 setmsg: 6703 { 6704 struct mbuf *n; 6705 struct sadb_msg *newmsg; 6706 struct sadb_supported *sup; 6707 u_int len, alen, elen; 6708 int off; 6709 int i; 6710 struct sadb_alg *alg; 6711 6712 /* create new sadb_msg to reply. */ 6713 alen = 0; 6714 for (i = 1; i <= SADB_AALG_MAX; i++) { 6715 if (ah_algorithm_lookup(i)) 6716 alen += sizeof(struct sadb_alg); 6717 } 6718 if (alen) 6719 alen += sizeof(struct sadb_supported); 6720 elen = 0; 6721 for (i = 1; i <= SADB_EALG_MAX; i++) { 6722 if (esp_algorithm_lookup(i)) 6723 elen += sizeof(struct sadb_alg); 6724 } 6725 if (elen) 6726 elen += sizeof(struct sadb_supported); 6727 6728 len = sizeof(struct sadb_msg) + alen + elen; 6729 6730 if (len > MCLBYTES) 6731 return key_senderror(so, m, ENOBUFS); 6732 6733 MGETHDR(n, M_DONTWAIT, MT_DATA); 6734 if (len > MHLEN) { 6735 MCLGET(n, M_DONTWAIT); 6736 if ((n->m_flags & M_EXT) == 0) { 6737 m_freem(n); 6738 n = NULL; 6739 } 6740 } 6741 if (!n) 6742 return key_senderror(so, m, ENOBUFS); 6743 6744 n->m_pkthdr.len = n->m_len = len; 6745 n->m_next = NULL; 6746 off = 0; 6747 6748 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6749 newmsg = mtod(n, struct sadb_msg *); 6750 newmsg->sadb_msg_errno = 0; 6751 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6752 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6753 6754 /* for authentication algorithm */ 6755 if (alen) { 6756 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6757 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6758 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6759 off += PFKEY_ALIGN8(sizeof(*sup)); 6760 6761 for (i = 1; i <= SADB_AALG_MAX; i++) { 6762 const struct auth_hash *aalgo; 6763 u_int16_t minkeysize, maxkeysize; 6764 6765 aalgo = ah_algorithm_lookup(i); 6766 if (!aalgo) 6767 continue; 6768 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6769 alg->sadb_alg_id = i; 6770 alg->sadb_alg_ivlen = 0; 6771 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6772 alg->sadb_alg_minbits = _BITS(minkeysize); 6773 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6774 off += PFKEY_ALIGN8(sizeof(*alg)); 6775 } 6776 } 6777 6778 /* for encryption algorithm */ 6779 if (elen) { 6780 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6781 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6782 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6783 off += PFKEY_ALIGN8(sizeof(*sup)); 6784 6785 for (i = 1; i <= SADB_EALG_MAX; i++) { 6786 const struct enc_xform *ealgo; 6787 6788 ealgo = esp_algorithm_lookup(i); 6789 if (!ealgo) 6790 continue; 6791 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6792 alg->sadb_alg_id = i; 6793 alg->sadb_alg_ivlen = ealgo->blocksize; 6794 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6795 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6796 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6797 } 6798 } 6799 6800 KASSERTMSG(off == len, "length inconsistency"); 6801 6802 m_freem(m); 6803 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6804 } 6805 } 6806 6807 /* 6808 * free secreg entry registered. 6809 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6810 */ 6811 void 6812 key_freereg(struct socket *so) 6813 { 6814 struct secreg *reg; 6815 int i; 6816 6817 KASSERT(so != NULL); 6818 6819 /* 6820 * check whether existing or not. 6821 * check all type of SA, because there is a potential that 6822 * one socket is registered to multiple type of SA. 6823 */ 6824 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6825 LIST_FOREACH(reg, ®tree[i], chain) { 6826 if (reg->so == so 6827 && __LIST_CHAINED(reg)) { 6828 LIST_REMOVE(reg, chain); 6829 KFREE(reg); 6830 break; 6831 } 6832 } 6833 } 6834 6835 return; 6836 } 6837 6838 /* 6839 * SADB_EXPIRE processing 6840 * send 6841 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6842 * to KMD by PF_KEY. 6843 * NOTE: We send only soft lifetime extension. 6844 * 6845 * OUT: 0 : succeed 6846 * others : error number 6847 */ 6848 static int 6849 key_expire(struct secasvar *sav) 6850 { 6851 int s; 6852 int satype; 6853 struct mbuf *result = NULL, *m; 6854 int len; 6855 int error = -1; 6856 struct sadb_lifetime *lt; 6857 6858 /* XXX: Why do we lock ? */ 6859 s = splsoftnet(); /*called from softclock()*/ 6860 6861 KASSERT(sav != NULL); 6862 KASSERT(sav->sah != NULL); 6863 6864 satype = key_proto2satype(sav->sah->saidx.proto); 6865 KASSERTMSG(satype != 0, "invalid proto is passed"); 6866 6867 /* set msg header */ 6868 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6869 if (!m) { 6870 error = ENOBUFS; 6871 goto fail; 6872 } 6873 result = m; 6874 6875 /* create SA extension */ 6876 m = key_setsadbsa(sav); 6877 if (!m) { 6878 error = ENOBUFS; 6879 goto fail; 6880 } 6881 m_cat(result, m); 6882 6883 /* create SA extension */ 6884 m = key_setsadbxsa2(sav->sah->saidx.mode, 6885 sav->replay ? sav->replay->count : 0, 6886 sav->sah->saidx.reqid); 6887 if (!m) { 6888 error = ENOBUFS; 6889 goto fail; 6890 } 6891 m_cat(result, m); 6892 6893 /* create lifetime extension (current and soft) */ 6894 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6895 m = key_alloc_mbuf(len); 6896 if (!m || m->m_next) { /*XXX*/ 6897 if (m) 6898 m_freem(m); 6899 error = ENOBUFS; 6900 goto fail; 6901 } 6902 memset(mtod(m, void *), 0, len); 6903 lt = mtod(m, struct sadb_lifetime *); 6904 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6905 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6906 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6907 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6908 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime 6909 + time_second - time_uptime; 6910 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime 6911 + time_second - time_uptime; 6912 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6913 memcpy(lt, sav->lft_s, sizeof(*lt)); 6914 m_cat(result, m); 6915 6916 /* set sadb_address for source */ 6917 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6918 &sav->sah->saidx.src.sa, 6919 FULLMASK, IPSEC_ULPROTO_ANY); 6920 if (!m) { 6921 error = ENOBUFS; 6922 goto fail; 6923 } 6924 m_cat(result, m); 6925 6926 /* set sadb_address for destination */ 6927 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6928 &sav->sah->saidx.dst.sa, 6929 FULLMASK, IPSEC_ULPROTO_ANY); 6930 if (!m) { 6931 error = ENOBUFS; 6932 goto fail; 6933 } 6934 m_cat(result, m); 6935 6936 if ((result->m_flags & M_PKTHDR) == 0) { 6937 error = EINVAL; 6938 goto fail; 6939 } 6940 6941 if (result->m_len < sizeof(struct sadb_msg)) { 6942 result = m_pullup(result, sizeof(struct sadb_msg)); 6943 if (result == NULL) { 6944 error = ENOBUFS; 6945 goto fail; 6946 } 6947 } 6948 6949 result->m_pkthdr.len = 0; 6950 for (m = result; m; m = m->m_next) 6951 result->m_pkthdr.len += m->m_len; 6952 6953 mtod(result, struct sadb_msg *)->sadb_msg_len = 6954 PFKEY_UNIT64(result->m_pkthdr.len); 6955 6956 splx(s); 6957 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6958 6959 fail: 6960 if (result) 6961 m_freem(result); 6962 splx(s); 6963 return error; 6964 } 6965 6966 /* 6967 * SADB_FLUSH processing 6968 * receive 6969 * <base> 6970 * from the ikmpd, and free all entries in secastree. 6971 * and send, 6972 * <base> 6973 * to the ikmpd. 6974 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6975 * 6976 * m will always be freed. 6977 */ 6978 static int 6979 key_flush(struct socket *so, struct mbuf *m, 6980 const struct sadb_msghdr *mhp) 6981 { 6982 struct sadb_msg *newmsg; 6983 struct secashead *sah, *nextsah; 6984 struct secasvar *sav, *nextsav; 6985 u_int16_t proto; 6986 u_int8_t state; 6987 u_int stateidx; 6988 6989 KASSERT(so != NULL); 6990 KASSERT(mhp != NULL); 6991 KASSERT(mhp->msg != NULL); 6992 6993 /* map satype to proto */ 6994 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6995 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6996 return key_senderror(so, m, EINVAL); 6997 } 6998 6999 /* no SATYPE specified, i.e. flushing all SA. */ 7000 for (sah = LIST_FIRST(&sahtree); 7001 sah != NULL; 7002 sah = nextsah) { 7003 nextsah = LIST_NEXT(sah, chain); 7004 7005 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7006 && proto != sah->saidx.proto) 7007 continue; 7008 7009 for (stateidx = 0; 7010 stateidx < _ARRAYLEN(saorder_state_alive); 7011 stateidx++) { 7012 state = saorder_state_any[stateidx]; 7013 for (sav = LIST_FIRST(&sah->savtree[state]); 7014 sav != NULL; 7015 sav = nextsav) { 7016 7017 nextsav = LIST_NEXT(sav, chain); 7018 7019 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7020 KEY_FREESAV(&sav); 7021 } 7022 } 7023 7024 sah->state = SADB_SASTATE_DEAD; 7025 } 7026 7027 if (m->m_len < sizeof(struct sadb_msg) || 7028 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7029 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 7030 return key_senderror(so, m, ENOBUFS); 7031 } 7032 7033 if (m->m_next) 7034 m_freem(m->m_next); 7035 m->m_next = NULL; 7036 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7037 newmsg = mtod(m, struct sadb_msg *); 7038 newmsg->sadb_msg_errno = 0; 7039 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7040 7041 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7042 } 7043 7044 7045 static struct mbuf * 7046 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 7047 { 7048 struct secashead *sah; 7049 struct secasvar *sav; 7050 u_int16_t proto; 7051 u_int stateidx; 7052 u_int8_t satype; 7053 u_int8_t state; 7054 int cnt; 7055 struct mbuf *m, *n, *prev; 7056 7057 *lenp = 0; 7058 7059 /* map satype to proto */ 7060 if ((proto = key_satype2proto(req_satype)) == 0) { 7061 *errorp = EINVAL; 7062 return (NULL); 7063 } 7064 7065 /* count sav entries to be sent to userland. */ 7066 cnt = 0; 7067 LIST_FOREACH(sah, &sahtree, chain) { 7068 if (req_satype != SADB_SATYPE_UNSPEC && 7069 proto != sah->saidx.proto) 7070 continue; 7071 7072 for (stateidx = 0; 7073 stateidx < _ARRAYLEN(saorder_state_any); 7074 stateidx++) { 7075 state = saorder_state_any[stateidx]; 7076 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7077 cnt++; 7078 } 7079 } 7080 } 7081 7082 if (cnt == 0) { 7083 *errorp = ENOENT; 7084 return (NULL); 7085 } 7086 7087 /* send this to the userland, one at a time. */ 7088 m = NULL; 7089 prev = m; 7090 LIST_FOREACH(sah, &sahtree, chain) { 7091 if (req_satype != SADB_SATYPE_UNSPEC && 7092 proto != sah->saidx.proto) 7093 continue; 7094 7095 /* map proto to satype */ 7096 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7097 m_freem(m); 7098 *errorp = EINVAL; 7099 return (NULL); 7100 } 7101 7102 for (stateidx = 0; 7103 stateidx < _ARRAYLEN(saorder_state_any); 7104 stateidx++) { 7105 state = saorder_state_any[stateidx]; 7106 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7107 n = key_setdumpsa(sav, SADB_DUMP, satype, 7108 --cnt, pid); 7109 if (!n) { 7110 m_freem(m); 7111 *errorp = ENOBUFS; 7112 return (NULL); 7113 } 7114 7115 if (!m) 7116 m = n; 7117 else 7118 prev->m_nextpkt = n; 7119 prev = n; 7120 } 7121 } 7122 } 7123 7124 if (!m) { 7125 *errorp = EINVAL; 7126 return (NULL); 7127 } 7128 7129 if ((m->m_flags & M_PKTHDR) != 0) { 7130 m->m_pkthdr.len = 0; 7131 for (n = m; n; n = n->m_next) 7132 m->m_pkthdr.len += n->m_len; 7133 } 7134 7135 *errorp = 0; 7136 return (m); 7137 } 7138 7139 /* 7140 * SADB_DUMP processing 7141 * dump all entries including status of DEAD in SAD. 7142 * receive 7143 * <base> 7144 * from the ikmpd, and dump all secasvar leaves 7145 * and send, 7146 * <base> ..... 7147 * to the ikmpd. 7148 * 7149 * m will always be freed. 7150 */ 7151 static int 7152 key_dump(struct socket *so, struct mbuf *m0, 7153 const struct sadb_msghdr *mhp) 7154 { 7155 u_int16_t proto; 7156 u_int8_t satype; 7157 struct mbuf *n; 7158 int s; 7159 int error, len, ok; 7160 7161 KASSERT(so != NULL); 7162 KASSERT(m0 != NULL); 7163 KASSERT(mhp != NULL); 7164 KASSERT(mhp->msg != NULL); 7165 7166 /* map satype to proto */ 7167 satype = mhp->msg->sadb_msg_satype; 7168 if ((proto = key_satype2proto(satype)) == 0) { 7169 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 7170 return key_senderror(so, m0, EINVAL); 7171 } 7172 7173 /* 7174 * If the requestor has insufficient socket-buffer space 7175 * for the entire chain, nobody gets any response to the DUMP. 7176 * XXX For now, only the requestor ever gets anything. 7177 * Moreover, if the requestor has any space at all, they receive 7178 * the entire chain, otherwise the request is refused with ENOBUFS. 7179 */ 7180 if (sbspace(&so->so_rcv) <= 0) { 7181 return key_senderror(so, m0, ENOBUFS); 7182 } 7183 7184 s = splsoftnet(); 7185 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7186 splx(s); 7187 7188 if (n == NULL) { 7189 return key_senderror(so, m0, ENOENT); 7190 } 7191 { 7192 uint64_t *ps = PFKEY_STAT_GETREF(); 7193 ps[PFKEY_STAT_IN_TOTAL]++; 7194 ps[PFKEY_STAT_IN_BYTES] += len; 7195 PFKEY_STAT_PUTREF(); 7196 } 7197 7198 /* 7199 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7200 * The requestor receives either the entire chain, or an 7201 * error message with ENOBUFS. 7202 * 7203 * sbappendaddrchain() takes the chain of entries, one 7204 * packet-record per SPD entry, prepends the key_src sockaddr 7205 * to each packet-record, links the sockaddr mbufs into a new 7206 * list of records, then appends the entire resulting 7207 * list to the requesting socket. 7208 */ 7209 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 7210 n, SB_PRIO_ONESHOT_OVERFLOW); 7211 7212 if (!ok) { 7213 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7214 m_freem(n); 7215 return key_senderror(so, m0, ENOBUFS); 7216 } 7217 7218 m_freem(m0); 7219 return 0; 7220 } 7221 7222 /* 7223 * SADB_X_PROMISC processing 7224 * 7225 * m will always be freed. 7226 */ 7227 static int 7228 key_promisc(struct socket *so, struct mbuf *m, 7229 const struct sadb_msghdr *mhp) 7230 { 7231 int olen; 7232 7233 KASSERT(so != NULL); 7234 KASSERT(m != NULL); 7235 KASSERT(mhp != NULL); 7236 KASSERT(mhp->msg != NULL); 7237 7238 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7239 7240 if (olen < sizeof(struct sadb_msg)) { 7241 #if 1 7242 return key_senderror(so, m, EINVAL); 7243 #else 7244 m_freem(m); 7245 return 0; 7246 #endif 7247 } else if (olen == sizeof(struct sadb_msg)) { 7248 /* enable/disable promisc mode */ 7249 struct keycb *kp; 7250 7251 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7252 return key_senderror(so, m, EINVAL); 7253 mhp->msg->sadb_msg_errno = 0; 7254 switch (mhp->msg->sadb_msg_satype) { 7255 case 0: 7256 case 1: 7257 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7258 break; 7259 default: 7260 return key_senderror(so, m, EINVAL); 7261 } 7262 7263 /* send the original message back to everyone */ 7264 mhp->msg->sadb_msg_errno = 0; 7265 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7266 } else { 7267 /* send packet as is */ 7268 7269 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7270 7271 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7272 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7273 } 7274 } 7275 7276 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7277 const struct sadb_msghdr *) = { 7278 NULL, /* SADB_RESERVED */ 7279 key_getspi, /* SADB_GETSPI */ 7280 key_update, /* SADB_UPDATE */ 7281 key_add, /* SADB_ADD */ 7282 key_delete, /* SADB_DELETE */ 7283 key_get, /* SADB_GET */ 7284 key_acquire2, /* SADB_ACQUIRE */ 7285 key_register, /* SADB_REGISTER */ 7286 NULL, /* SADB_EXPIRE */ 7287 key_flush, /* SADB_FLUSH */ 7288 key_dump, /* SADB_DUMP */ 7289 key_promisc, /* SADB_X_PROMISC */ 7290 NULL, /* SADB_X_PCHANGE */ 7291 key_spdadd, /* SADB_X_SPDUPDATE */ 7292 key_spdadd, /* SADB_X_SPDADD */ 7293 key_spddelete, /* SADB_X_SPDDELETE */ 7294 key_spdget, /* SADB_X_SPDGET */ 7295 NULL, /* SADB_X_SPDACQUIRE */ 7296 key_spddump, /* SADB_X_SPDDUMP */ 7297 key_spdflush, /* SADB_X_SPDFLUSH */ 7298 key_spdadd, /* SADB_X_SPDSETIDX */ 7299 NULL, /* SADB_X_SPDEXPIRE */ 7300 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7301 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7302 }; 7303 7304 /* 7305 * parse sadb_msg buffer to process PFKEYv2, 7306 * and create a data to response if needed. 7307 * I think to be dealed with mbuf directly. 7308 * IN: 7309 * msgp : pointer to pointer to a received buffer pulluped. 7310 * This is rewrited to response. 7311 * so : pointer to socket. 7312 * OUT: 7313 * length for buffer to send to user process. 7314 */ 7315 int 7316 key_parse(struct mbuf *m, struct socket *so) 7317 { 7318 struct sadb_msg *msg; 7319 struct sadb_msghdr mh; 7320 u_int orglen; 7321 int error; 7322 int target; 7323 7324 KASSERT(m != NULL); 7325 KASSERT(so != NULL); 7326 7327 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7328 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7329 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 7330 kdebug_sadb(msg); 7331 } 7332 #endif 7333 7334 if (m->m_len < sizeof(struct sadb_msg)) { 7335 m = m_pullup(m, sizeof(struct sadb_msg)); 7336 if (!m) 7337 return ENOBUFS; 7338 } 7339 msg = mtod(m, struct sadb_msg *); 7340 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7341 target = KEY_SENDUP_ONE; 7342 7343 if ((m->m_flags & M_PKTHDR) == 0 || 7344 m->m_pkthdr.len != orglen) { 7345 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 7346 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7347 error = EINVAL; 7348 goto senderror; 7349 } 7350 7351 if (msg->sadb_msg_version != PF_KEY_V2) { 7352 ipseclog((LOG_DEBUG, 7353 "key_parse: PF_KEY version %u is mismatched.\n", 7354 msg->sadb_msg_version)); 7355 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7356 error = EINVAL; 7357 goto senderror; 7358 } 7359 7360 if (msg->sadb_msg_type > SADB_MAX) { 7361 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7362 msg->sadb_msg_type)); 7363 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7364 error = EINVAL; 7365 goto senderror; 7366 } 7367 7368 /* for old-fashioned code - should be nuked */ 7369 if (m->m_pkthdr.len > MCLBYTES) { 7370 m_freem(m); 7371 return ENOBUFS; 7372 } 7373 if (m->m_next) { 7374 struct mbuf *n; 7375 7376 MGETHDR(n, M_DONTWAIT, MT_DATA); 7377 if (n && m->m_pkthdr.len > MHLEN) { 7378 MCLGET(n, M_DONTWAIT); 7379 if ((n->m_flags & M_EXT) == 0) { 7380 m_free(n); 7381 n = NULL; 7382 } 7383 } 7384 if (!n) { 7385 m_freem(m); 7386 return ENOBUFS; 7387 } 7388 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7389 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7390 n->m_next = NULL; 7391 m_freem(m); 7392 m = n; 7393 } 7394 7395 /* align the mbuf chain so that extensions are in contiguous region. */ 7396 error = key_align(m, &mh); 7397 if (error) 7398 return error; 7399 7400 if (m->m_next) { /*XXX*/ 7401 m_freem(m); 7402 return ENOBUFS; 7403 } 7404 7405 msg = mh.msg; 7406 7407 /* check SA type */ 7408 switch (msg->sadb_msg_satype) { 7409 case SADB_SATYPE_UNSPEC: 7410 switch (msg->sadb_msg_type) { 7411 case SADB_GETSPI: 7412 case SADB_UPDATE: 7413 case SADB_ADD: 7414 case SADB_DELETE: 7415 case SADB_GET: 7416 case SADB_ACQUIRE: 7417 case SADB_EXPIRE: 7418 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7419 "when msg type=%u.\n", msg->sadb_msg_type)); 7420 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7421 error = EINVAL; 7422 goto senderror; 7423 } 7424 break; 7425 case SADB_SATYPE_AH: 7426 case SADB_SATYPE_ESP: 7427 case SADB_X_SATYPE_IPCOMP: 7428 case SADB_X_SATYPE_TCPSIGNATURE: 7429 switch (msg->sadb_msg_type) { 7430 case SADB_X_SPDADD: 7431 case SADB_X_SPDDELETE: 7432 case SADB_X_SPDGET: 7433 case SADB_X_SPDDUMP: 7434 case SADB_X_SPDFLUSH: 7435 case SADB_X_SPDSETIDX: 7436 case SADB_X_SPDUPDATE: 7437 case SADB_X_SPDDELETE2: 7438 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7439 msg->sadb_msg_type)); 7440 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7441 error = EINVAL; 7442 goto senderror; 7443 } 7444 break; 7445 case SADB_SATYPE_RSVP: 7446 case SADB_SATYPE_OSPFV2: 7447 case SADB_SATYPE_RIPV2: 7448 case SADB_SATYPE_MIP: 7449 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7450 msg->sadb_msg_satype)); 7451 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7452 error = EOPNOTSUPP; 7453 goto senderror; 7454 case 1: /* XXX: What does it do? */ 7455 if (msg->sadb_msg_type == SADB_X_PROMISC) 7456 break; 7457 /*FALLTHROUGH*/ 7458 default: 7459 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7460 msg->sadb_msg_satype)); 7461 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7462 error = EINVAL; 7463 goto senderror; 7464 } 7465 7466 /* check field of upper layer protocol and address family */ 7467 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7468 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7469 struct sadb_address *src0, *dst0; 7470 u_int plen; 7471 7472 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7473 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7474 7475 /* check upper layer protocol */ 7476 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7477 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7478 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7479 error = EINVAL; 7480 goto senderror; 7481 } 7482 7483 /* check family */ 7484 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7485 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7486 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7487 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7488 error = EINVAL; 7489 goto senderror; 7490 } 7491 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7492 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7493 ipseclog((LOG_DEBUG, 7494 "key_parse: address struct size mismatched.\n")); 7495 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7496 error = EINVAL; 7497 goto senderror; 7498 } 7499 7500 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7501 case AF_INET: 7502 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7503 sizeof(struct sockaddr_in)) { 7504 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7505 error = EINVAL; 7506 goto senderror; 7507 } 7508 break; 7509 case AF_INET6: 7510 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7511 sizeof(struct sockaddr_in6)) { 7512 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7513 error = EINVAL; 7514 goto senderror; 7515 } 7516 break; 7517 default: 7518 ipseclog((LOG_DEBUG, 7519 "key_parse: unsupported address family.\n")); 7520 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7521 error = EAFNOSUPPORT; 7522 goto senderror; 7523 } 7524 7525 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7526 case AF_INET: 7527 plen = sizeof(struct in_addr) << 3; 7528 break; 7529 case AF_INET6: 7530 plen = sizeof(struct in6_addr) << 3; 7531 break; 7532 default: 7533 plen = 0; /*fool gcc*/ 7534 break; 7535 } 7536 7537 /* check max prefix length */ 7538 if (src0->sadb_address_prefixlen > plen || 7539 dst0->sadb_address_prefixlen > plen) { 7540 ipseclog((LOG_DEBUG, 7541 "key_parse: illegal prefixlen.\n")); 7542 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7543 error = EINVAL; 7544 goto senderror; 7545 } 7546 7547 /* 7548 * prefixlen == 0 is valid because there can be a case when 7549 * all addresses are matched. 7550 */ 7551 } 7552 7553 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7554 key_typesw[msg->sadb_msg_type] == NULL) { 7555 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7556 error = EINVAL; 7557 goto senderror; 7558 } 7559 7560 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7561 7562 senderror: 7563 msg->sadb_msg_errno = error; 7564 return key_sendup_mbuf(so, m, target); 7565 } 7566 7567 static int 7568 key_senderror(struct socket *so, struct mbuf *m, int code) 7569 { 7570 struct sadb_msg *msg; 7571 7572 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7573 7574 msg = mtod(m, struct sadb_msg *); 7575 msg->sadb_msg_errno = code; 7576 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7577 } 7578 7579 /* 7580 * set the pointer to each header into message buffer. 7581 * m will be freed on error. 7582 * XXX larger-than-MCLBYTES extension? 7583 */ 7584 static int 7585 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7586 { 7587 struct mbuf *n; 7588 struct sadb_ext *ext; 7589 size_t off, end; 7590 int extlen; 7591 int toff; 7592 7593 KASSERT(m != NULL); 7594 KASSERT(mhp != NULL); 7595 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7596 7597 /* initialize */ 7598 memset(mhp, 0, sizeof(*mhp)); 7599 7600 mhp->msg = mtod(m, struct sadb_msg *); 7601 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7602 7603 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7604 extlen = end; /*just in case extlen is not updated*/ 7605 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7606 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7607 if (!n) { 7608 /* m is already freed */ 7609 return ENOBUFS; 7610 } 7611 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7612 7613 /* set pointer */ 7614 switch (ext->sadb_ext_type) { 7615 case SADB_EXT_SA: 7616 case SADB_EXT_ADDRESS_SRC: 7617 case SADB_EXT_ADDRESS_DST: 7618 case SADB_EXT_ADDRESS_PROXY: 7619 case SADB_EXT_LIFETIME_CURRENT: 7620 case SADB_EXT_LIFETIME_HARD: 7621 case SADB_EXT_LIFETIME_SOFT: 7622 case SADB_EXT_KEY_AUTH: 7623 case SADB_EXT_KEY_ENCRYPT: 7624 case SADB_EXT_IDENTITY_SRC: 7625 case SADB_EXT_IDENTITY_DST: 7626 case SADB_EXT_SENSITIVITY: 7627 case SADB_EXT_PROPOSAL: 7628 case SADB_EXT_SUPPORTED_AUTH: 7629 case SADB_EXT_SUPPORTED_ENCRYPT: 7630 case SADB_EXT_SPIRANGE: 7631 case SADB_X_EXT_POLICY: 7632 case SADB_X_EXT_SA2: 7633 case SADB_X_EXT_NAT_T_TYPE: 7634 case SADB_X_EXT_NAT_T_SPORT: 7635 case SADB_X_EXT_NAT_T_DPORT: 7636 case SADB_X_EXT_NAT_T_OAI: 7637 case SADB_X_EXT_NAT_T_OAR: 7638 case SADB_X_EXT_NAT_T_FRAG: 7639 /* duplicate check */ 7640 /* 7641 * XXX Are there duplication payloads of either 7642 * KEY_AUTH or KEY_ENCRYPT ? 7643 */ 7644 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7645 ipseclog((LOG_DEBUG, 7646 "key_align: duplicate ext_type %u " 7647 "is passed.\n", ext->sadb_ext_type)); 7648 m_freem(m); 7649 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7650 return EINVAL; 7651 } 7652 break; 7653 default: 7654 ipseclog((LOG_DEBUG, 7655 "key_align: invalid ext_type %u is passed.\n", 7656 ext->sadb_ext_type)); 7657 m_freem(m); 7658 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7659 return EINVAL; 7660 } 7661 7662 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7663 7664 if (key_validate_ext(ext, extlen)) { 7665 m_freem(m); 7666 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7667 return EINVAL; 7668 } 7669 7670 n = m_pulldown(m, off, extlen, &toff); 7671 if (!n) { 7672 /* m is already freed */ 7673 return ENOBUFS; 7674 } 7675 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7676 7677 mhp->ext[ext->sadb_ext_type] = ext; 7678 mhp->extoff[ext->sadb_ext_type] = off; 7679 mhp->extlen[ext->sadb_ext_type] = extlen; 7680 } 7681 7682 if (off != end) { 7683 m_freem(m); 7684 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7685 return EINVAL; 7686 } 7687 7688 return 0; 7689 } 7690 7691 static int 7692 key_validate_ext(const struct sadb_ext *ext, int len) 7693 { 7694 const struct sockaddr *sa; 7695 enum { NONE, ADDR } checktype = NONE; 7696 int baselen = 0; 7697 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7698 7699 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7700 return EINVAL; 7701 7702 /* if it does not match minimum/maximum length, bail */ 7703 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7704 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7705 return EINVAL; 7706 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7707 return EINVAL; 7708 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7709 return EINVAL; 7710 7711 /* more checks based on sadb_ext_type XXX need more */ 7712 switch (ext->sadb_ext_type) { 7713 case SADB_EXT_ADDRESS_SRC: 7714 case SADB_EXT_ADDRESS_DST: 7715 case SADB_EXT_ADDRESS_PROXY: 7716 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7717 checktype = ADDR; 7718 break; 7719 case SADB_EXT_IDENTITY_SRC: 7720 case SADB_EXT_IDENTITY_DST: 7721 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7722 SADB_X_IDENTTYPE_ADDR) { 7723 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7724 checktype = ADDR; 7725 } else 7726 checktype = NONE; 7727 break; 7728 default: 7729 checktype = NONE; 7730 break; 7731 } 7732 7733 switch (checktype) { 7734 case NONE: 7735 break; 7736 case ADDR: 7737 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7738 if (len < baselen + sal) 7739 return EINVAL; 7740 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7741 return EINVAL; 7742 break; 7743 } 7744 7745 return 0; 7746 } 7747 7748 static int 7749 key_do_init(void) 7750 { 7751 int i; 7752 7753 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7754 7755 callout_init(&key_timehandler_ch, 0); 7756 7757 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7758 LIST_INIT(&sptree[i]); 7759 } 7760 7761 LIST_INIT(&sahtree); 7762 7763 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7764 LIST_INIT(®tree[i]); 7765 } 7766 7767 #ifndef IPSEC_NONBLOCK_ACQUIRE 7768 LIST_INIT(&acqtree); 7769 #endif 7770 LIST_INIT(&spacqtree); 7771 7772 /* system default */ 7773 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7774 ip4_def_policy.refcnt++; /*never reclaim this*/ 7775 7776 #ifdef INET6 7777 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7778 ip6_def_policy.refcnt++; /*never reclaim this*/ 7779 #endif 7780 7781 7782 #ifndef IPSEC_DEBUG2 7783 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7784 #endif /*IPSEC_DEBUG2*/ 7785 7786 /* initialize key statistics */ 7787 keystat.getspi_count = 1; 7788 7789 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7790 7791 return (0); 7792 } 7793 7794 void 7795 key_init(void) 7796 { 7797 static ONCE_DECL(key_init_once); 7798 7799 sysctl_net_keyv2_setup(NULL); 7800 sysctl_net_key_compat_setup(NULL); 7801 7802 RUN_ONCE(&key_init_once, key_do_init); 7803 } 7804 7805 /* 7806 * XXX: maybe This function is called after INBOUND IPsec processing. 7807 * 7808 * Special check for tunnel-mode packets. 7809 * We must make some checks for consistency between inner and outer IP header. 7810 * 7811 * xxx more checks to be provided 7812 */ 7813 int 7814 key_checktunnelsanity( 7815 struct secasvar *sav, 7816 u_int family, 7817 void *src, 7818 void *dst 7819 ) 7820 { 7821 7822 KASSERT(sav->sah != NULL); 7823 7824 /* XXX: check inner IP header */ 7825 7826 return 1; 7827 } 7828 7829 #if 0 7830 #define hostnamelen strlen(hostname) 7831 7832 /* 7833 * Get FQDN for the host. 7834 * If the administrator configured hostname (by hostname(1)) without 7835 * domain name, returns nothing. 7836 */ 7837 static const char * 7838 key_getfqdn(void) 7839 { 7840 int i; 7841 int hasdot; 7842 static char fqdn[MAXHOSTNAMELEN + 1]; 7843 7844 if (!hostnamelen) 7845 return NULL; 7846 7847 /* check if it comes with domain name. */ 7848 hasdot = 0; 7849 for (i = 0; i < hostnamelen; i++) { 7850 if (hostname[i] == '.') 7851 hasdot++; 7852 } 7853 if (!hasdot) 7854 return NULL; 7855 7856 /* NOTE: hostname may not be NUL-terminated. */ 7857 memset(fqdn, 0, sizeof(fqdn)); 7858 memcpy(fqdn, hostname, hostnamelen); 7859 fqdn[hostnamelen] = '\0'; 7860 return fqdn; 7861 } 7862 7863 /* 7864 * get username@FQDN for the host/user. 7865 */ 7866 static const char * 7867 key_getuserfqdn(void) 7868 { 7869 const char *host; 7870 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7871 struct proc *p = curproc; 7872 char *q; 7873 7874 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7875 return NULL; 7876 if (!(host = key_getfqdn())) 7877 return NULL; 7878 7879 /* NOTE: s_login may not be-NUL terminated. */ 7880 memset(userfqdn, 0, sizeof(userfqdn)); 7881 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7882 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7883 q = userfqdn + strlen(userfqdn); 7884 *q++ = '@'; 7885 memcpy(q, host, strlen(host)); 7886 q += strlen(host); 7887 *q++ = '\0'; 7888 7889 return userfqdn; 7890 } 7891 #endif 7892 7893 /* record data transfer on SA, and update timestamps */ 7894 void 7895 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7896 { 7897 7898 KASSERT(sav != NULL); 7899 KASSERT(m != NULL); 7900 if (!sav->lft_c) 7901 return; 7902 7903 /* 7904 * XXX Currently, there is a difference of bytes size 7905 * between inbound and outbound processing. 7906 */ 7907 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7908 /* to check bytes lifetime is done in key_timehandler(). */ 7909 7910 /* 7911 * We use the number of packets as the unit of 7912 * sadb_lifetime_allocations. We increment the variable 7913 * whenever {esp,ah}_{in,out}put is called. 7914 */ 7915 sav->lft_c->sadb_lifetime_allocations++; 7916 /* XXX check for expires? */ 7917 7918 /* 7919 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7920 * in seconds. HARD and SOFT lifetime are measured by the time 7921 * difference (again in seconds) from sadb_lifetime_usetime. 7922 * 7923 * usetime 7924 * v expire expire 7925 * -----+-----+--------+---> t 7926 * <--------------> HARD 7927 * <-----> SOFT 7928 */ 7929 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7930 /* XXX check for expires? */ 7931 7932 return; 7933 } 7934 7935 /* dumb version */ 7936 void 7937 key_sa_routechange(struct sockaddr *dst) 7938 { 7939 struct secashead *sah; 7940 struct route *ro; 7941 const struct sockaddr *sa; 7942 7943 LIST_FOREACH(sah, &sahtree, chain) { 7944 ro = &sah->sa_route; 7945 sa = rtcache_getdst(ro); 7946 if (sa != NULL && dst->sa_len == sa->sa_len && 7947 memcmp(dst, sa, dst->sa_len) == 0) 7948 rtcache_free(ro); 7949 } 7950 7951 return; 7952 } 7953 7954 static void 7955 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7956 { 7957 7958 KASSERT(sav != NULL); 7959 7960 if (sav->state == state) 7961 return; 7962 7963 if (__LIST_CHAINED(sav)) 7964 LIST_REMOVE(sav, chain); 7965 7966 sav->state = state; 7967 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7968 } 7969 7970 /* XXX too much? */ 7971 static struct mbuf * 7972 key_alloc_mbuf(int l) 7973 { 7974 struct mbuf *m = NULL, *n; 7975 int len, t; 7976 7977 len = l; 7978 while (len > 0) { 7979 MGET(n, M_DONTWAIT, MT_DATA); 7980 if (n && len > MLEN) 7981 MCLGET(n, M_DONTWAIT); 7982 if (!n) { 7983 m_freem(m); 7984 return NULL; 7985 } 7986 7987 n->m_next = NULL; 7988 n->m_len = 0; 7989 n->m_len = M_TRAILINGSPACE(n); 7990 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7991 if (n->m_len > len) { 7992 t = (n->m_len - len) & ~(sizeof(long) - 1); 7993 n->m_data += t; 7994 n->m_len = len; 7995 } 7996 7997 len -= n->m_len; 7998 7999 if (m) 8000 m_cat(m, n); 8001 else 8002 m = n; 8003 } 8004 8005 return m; 8006 } 8007 8008 static struct mbuf * 8009 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 8010 { 8011 struct secashead *sah; 8012 struct secasvar *sav; 8013 u_int16_t proto; 8014 u_int stateidx; 8015 u_int8_t satype; 8016 u_int8_t state; 8017 int cnt; 8018 struct mbuf *m, *n; 8019 8020 /* map satype to proto */ 8021 if ((proto = key_satype2proto(req_satype)) == 0) { 8022 *errorp = EINVAL; 8023 return (NULL); 8024 } 8025 8026 /* count sav entries to be sent to the userland. */ 8027 cnt = 0; 8028 LIST_FOREACH(sah, &sahtree, chain) { 8029 if (req_satype != SADB_SATYPE_UNSPEC && 8030 proto != sah->saidx.proto) 8031 continue; 8032 8033 for (stateidx = 0; 8034 stateidx < _ARRAYLEN(saorder_state_any); 8035 stateidx++) { 8036 state = saorder_state_any[stateidx]; 8037 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8038 cnt++; 8039 } 8040 } 8041 } 8042 8043 if (cnt == 0) { 8044 *errorp = ENOENT; 8045 return (NULL); 8046 } 8047 8048 /* send this to the userland, one at a time. */ 8049 m = NULL; 8050 LIST_FOREACH(sah, &sahtree, chain) { 8051 if (req_satype != SADB_SATYPE_UNSPEC && 8052 proto != sah->saidx.proto) 8053 continue; 8054 8055 /* map proto to satype */ 8056 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 8057 m_freem(m); 8058 *errorp = EINVAL; 8059 return (NULL); 8060 } 8061 8062 for (stateidx = 0; 8063 stateidx < _ARRAYLEN(saorder_state_any); 8064 stateidx++) { 8065 state = saorder_state_any[stateidx]; 8066 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8067 n = key_setdumpsa(sav, SADB_DUMP, satype, 8068 --cnt, pid); 8069 if (!n) { 8070 m_freem(m); 8071 *errorp = ENOBUFS; 8072 return (NULL); 8073 } 8074 8075 if (!m) 8076 m = n; 8077 else 8078 m_cat(m, n); 8079 } 8080 } 8081 } 8082 8083 if (!m) { 8084 *errorp = EINVAL; 8085 return (NULL); 8086 } 8087 8088 if ((m->m_flags & M_PKTHDR) != 0) { 8089 m->m_pkthdr.len = 0; 8090 for (n = m; n; n = n->m_next) 8091 m->m_pkthdr.len += n->m_len; 8092 } 8093 8094 *errorp = 0; 8095 return (m); 8096 } 8097 8098 static struct mbuf * 8099 key_setspddump(int *errorp, pid_t pid) 8100 { 8101 struct secpolicy *sp; 8102 int cnt; 8103 u_int dir; 8104 struct mbuf *m, *n; 8105 8106 /* search SPD entry and get buffer size. */ 8107 cnt = 0; 8108 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8109 LIST_FOREACH(sp, &sptree[dir], chain) { 8110 cnt++; 8111 } 8112 } 8113 8114 if (cnt == 0) { 8115 *errorp = ENOENT; 8116 return (NULL); 8117 } 8118 8119 m = NULL; 8120 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8121 LIST_FOREACH(sp, &sptree[dir], chain) { 8122 --cnt; 8123 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8124 8125 if (!n) { 8126 *errorp = ENOBUFS; 8127 m_freem(m); 8128 return (NULL); 8129 } 8130 if (!m) 8131 m = n; 8132 else { 8133 m->m_pkthdr.len += n->m_pkthdr.len; 8134 m_cat(m, n); 8135 } 8136 } 8137 } 8138 8139 *errorp = 0; 8140 return (m); 8141 } 8142 8143 int 8144 key_get_used(void) { 8145 return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || 8146 !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); 8147 } 8148 8149 void 8150 key_update_used(void) 8151 { 8152 switch (ipsec_enabled) { 8153 default: 8154 case 0: 8155 #ifdef notyet 8156 /* XXX: racy */ 8157 ipsec_used = 0; 8158 #endif 8159 break; 8160 case 1: 8161 #ifndef notyet 8162 /* XXX: racy */ 8163 if (!ipsec_used) 8164 #endif 8165 ipsec_used = key_get_used(); 8166 break; 8167 case 2: 8168 ipsec_used = 1; 8169 break; 8170 } 8171 } 8172 8173 static int 8174 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8175 { 8176 struct mbuf *m, *n; 8177 int err2 = 0; 8178 char *p, *ep; 8179 size_t len; 8180 int s, error; 8181 8182 if (newp) 8183 return (EPERM); 8184 if (namelen != 1) 8185 return (EINVAL); 8186 8187 s = splsoftnet(); 8188 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8189 splx(s); 8190 if (!m) 8191 return (error); 8192 if (!oldp) 8193 *oldlenp = m->m_pkthdr.len; 8194 else { 8195 p = oldp; 8196 if (*oldlenp < m->m_pkthdr.len) { 8197 err2 = ENOMEM; 8198 ep = p + *oldlenp; 8199 } else { 8200 *oldlenp = m->m_pkthdr.len; 8201 ep = p + m->m_pkthdr.len; 8202 } 8203 for (n = m; n; n = n->m_next) { 8204 len = (ep - p < n->m_len) ? 8205 ep - p : n->m_len; 8206 error = copyout(mtod(n, const void *), p, len); 8207 p += len; 8208 if (error) 8209 break; 8210 } 8211 if (error == 0) 8212 error = err2; 8213 } 8214 m_freem(m); 8215 8216 return (error); 8217 } 8218 8219 static int 8220 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8221 { 8222 struct mbuf *m, *n; 8223 int err2 = 0; 8224 char *p, *ep; 8225 size_t len; 8226 int s, error; 8227 8228 if (newp) 8229 return (EPERM); 8230 if (namelen != 0) 8231 return (EINVAL); 8232 8233 s = splsoftnet(); 8234 m = key_setspddump(&error, l->l_proc->p_pid); 8235 splx(s); 8236 if (!m) 8237 return (error); 8238 if (!oldp) 8239 *oldlenp = m->m_pkthdr.len; 8240 else { 8241 p = oldp; 8242 if (*oldlenp < m->m_pkthdr.len) { 8243 err2 = ENOMEM; 8244 ep = p + *oldlenp; 8245 } else { 8246 *oldlenp = m->m_pkthdr.len; 8247 ep = p + m->m_pkthdr.len; 8248 } 8249 for (n = m; n; n = n->m_next) { 8250 len = (ep - p < n->m_len) ? 8251 ep - p : n->m_len; 8252 error = copyout(mtod(n, const void *), p, len); 8253 p += len; 8254 if (error) 8255 break; 8256 } 8257 if (error == 0) 8258 error = err2; 8259 } 8260 m_freem(m); 8261 8262 return (error); 8263 } 8264 8265 /* 8266 * Create sysctl tree for native IPSEC key knobs, originally 8267 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8268 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8269 * and in any case the part of our sysctl namespace used for dumping the 8270 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8271 * namespace, for API reasons. 8272 * 8273 * Pending a consensus on the right way to fix this, add a level of 8274 * indirection in how we number the `native' IPSEC key nodes; 8275 * and (as requested by Andrew Brown) move registration of the 8276 * KAME-compatible names to a separate function. 8277 */ 8278 #if 0 8279 # define IPSEC_PFKEY PF_KEY_V2 8280 # define IPSEC_PFKEY_NAME "keyv2" 8281 #else 8282 # define IPSEC_PFKEY PF_KEY 8283 # define IPSEC_PFKEY_NAME "key" 8284 #endif 8285 8286 static int 8287 sysctl_net_key_stats(SYSCTLFN_ARGS) 8288 { 8289 8290 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8291 } 8292 8293 static void 8294 sysctl_net_keyv2_setup(struct sysctllog **clog) 8295 { 8296 8297 sysctl_createv(clog, 0, NULL, NULL, 8298 CTLFLAG_PERMANENT, 8299 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8300 NULL, 0, NULL, 0, 8301 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8302 8303 sysctl_createv(clog, 0, NULL, NULL, 8304 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8305 CTLTYPE_INT, "debug", NULL, 8306 NULL, 0, &key_debug_level, 0, 8307 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8308 sysctl_createv(clog, 0, NULL, NULL, 8309 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8310 CTLTYPE_INT, "spi_try", NULL, 8311 NULL, 0, &key_spi_trycnt, 0, 8312 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8313 sysctl_createv(clog, 0, NULL, NULL, 8314 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8315 CTLTYPE_INT, "spi_min_value", NULL, 8316 NULL, 0, &key_spi_minval, 0, 8317 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8318 sysctl_createv(clog, 0, NULL, NULL, 8319 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8320 CTLTYPE_INT, "spi_max_value", NULL, 8321 NULL, 0, &key_spi_maxval, 0, 8322 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8323 sysctl_createv(clog, 0, NULL, NULL, 8324 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8325 CTLTYPE_INT, "random_int", NULL, 8326 NULL, 0, &key_int_random, 0, 8327 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8328 sysctl_createv(clog, 0, NULL, NULL, 8329 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8330 CTLTYPE_INT, "larval_lifetime", NULL, 8331 NULL, 0, &key_larval_lifetime, 0, 8332 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8333 sysctl_createv(clog, 0, NULL, NULL, 8334 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8335 CTLTYPE_INT, "blockacq_count", NULL, 8336 NULL, 0, &key_blockacq_count, 0, 8337 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8338 sysctl_createv(clog, 0, NULL, NULL, 8339 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8340 CTLTYPE_INT, "blockacq_lifetime", NULL, 8341 NULL, 0, &key_blockacq_lifetime, 0, 8342 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8343 sysctl_createv(clog, 0, NULL, NULL, 8344 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8345 CTLTYPE_INT, "esp_keymin", NULL, 8346 NULL, 0, &ipsec_esp_keymin, 0, 8347 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8348 sysctl_createv(clog, 0, NULL, NULL, 8349 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8350 CTLTYPE_INT, "prefered_oldsa", NULL, 8351 NULL, 0, &key_prefered_oldsa, 0, 8352 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8353 sysctl_createv(clog, 0, NULL, NULL, 8354 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8355 CTLTYPE_INT, "esp_auth", NULL, 8356 NULL, 0, &ipsec_esp_auth, 0, 8357 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8358 sysctl_createv(clog, 0, NULL, NULL, 8359 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8360 CTLTYPE_INT, "ah_keymin", NULL, 8361 NULL, 0, &ipsec_ah_keymin, 0, 8362 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8363 sysctl_createv(clog, 0, NULL, NULL, 8364 CTLFLAG_PERMANENT, 8365 CTLTYPE_STRUCT, "stats", 8366 SYSCTL_DESCR("PF_KEY statistics"), 8367 sysctl_net_key_stats, 0, NULL, 0, 8368 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8369 } 8370 8371 /* 8372 * Register sysctl names used by setkey(8). For historical reasons, 8373 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8374 * for both IPSEC and KAME IPSEC. 8375 */ 8376 static void 8377 sysctl_net_key_compat_setup(struct sysctllog **clog) 8378 { 8379 8380 sysctl_createv(clog, 0, NULL, NULL, 8381 CTLFLAG_PERMANENT, 8382 CTLTYPE_NODE, "key", NULL, 8383 NULL, 0, NULL, 0, 8384 CTL_NET, PF_KEY, CTL_EOL); 8385 8386 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8387 sysctl_createv(clog, 0, NULL, NULL, 8388 CTLFLAG_PERMANENT, 8389 CTLTYPE_STRUCT, "dumpsa", NULL, 8390 sysctl_net_key_dumpsa, 0, NULL, 0, 8391 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8392 sysctl_createv(clog, 0, NULL, NULL, 8393 CTLFLAG_PERMANENT, 8394 CTLTYPE_STRUCT, "dumpsp", NULL, 8395 sysctl_net_key_dumpsp, 0, NULL, 0, 8396 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8397 } 8398
Indexes created Wed Sep 24 15:09:51 GMT 2025