key.c revision 1.124
1 /* $NetBSD: key.c,v 1.124 2017/05/15 09:52:05 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 1.124 2017/05/15 09:52:05 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 #define SASTATE_ALIVE_FOREACH(s) \ 175 for (int _i = 0; \ 176 _i < __arraycount(saorder_state_alive) ? \ 177 (s) = saorder_state_alive[_i], true : false; \ 178 _i++) 179 #define SASTATE_ANY_FOREACH(s) \ 180 for (int _i = 0; \ 181 _i < __arraycount(saorder_state_any) ? \ 182 (s) = saorder_state_any[_i], true : false; \ 183 _i++) 184 185 static const int minsize[] = { 186 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 187 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 188 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 189 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 190 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 191 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 192 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 193 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 194 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 195 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 196 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 197 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 198 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 199 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 200 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 201 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 202 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 203 0, /* SADB_X_EXT_KMPRIVATE */ 204 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 205 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 206 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 207 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 208 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 209 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 210 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 211 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 212 }; 213 static const int maxsize[] = { 214 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 215 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 216 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 217 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 218 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 219 0, /* SADB_EXT_ADDRESS_SRC */ 220 0, /* SADB_EXT_ADDRESS_DST */ 221 0, /* SADB_EXT_ADDRESS_PROXY */ 222 0, /* SADB_EXT_KEY_AUTH */ 223 0, /* SADB_EXT_KEY_ENCRYPT */ 224 0, /* SADB_EXT_IDENTITY_SRC */ 225 0, /* SADB_EXT_IDENTITY_DST */ 226 0, /* SADB_EXT_SENSITIVITY */ 227 0, /* SADB_EXT_PROPOSAL */ 228 0, /* SADB_EXT_SUPPORTED_AUTH */ 229 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 230 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 231 0, /* SADB_X_EXT_KMPRIVATE */ 232 0, /* SADB_X_EXT_POLICY */ 233 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 234 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 235 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 236 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 237 0, /* SADB_X_EXT_NAT_T_OAI */ 238 0, /* SADB_X_EXT_NAT_T_OAR */ 239 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 240 }; 241 242 static int ipsec_esp_keymin = 256; 243 static int ipsec_esp_auth = 0; 244 static int ipsec_ah_keymin = 128; 245 246 #ifdef SYSCTL_DECL 247 SYSCTL_DECL(_net_key); 248 #endif 249 250 #ifdef SYSCTL_INT 251 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 252 &key_debug_level, 0, ""); 253 254 /* max count of trial for the decision of spi value */ 255 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 256 &key_spi_trycnt, 0, ""); 257 258 /* minimum spi value to allocate automatically. */ 259 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 260 &key_spi_minval, 0, ""); 261 262 /* maximun spi value to allocate automatically. */ 263 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 264 &key_spi_maxval, 0, ""); 265 266 /* interval to initialize randseed */ 267 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 268 &key_int_random, 0, ""); 269 270 /* lifetime for larval SA */ 271 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 272 &key_larval_lifetime, 0, ""); 273 274 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 275 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 276 &key_blockacq_count, 0, ""); 277 278 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 279 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 280 &key_blockacq_lifetime, 0, ""); 281 282 /* ESP auth */ 283 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 284 &ipsec_esp_auth, 0, ""); 285 286 /* minimum ESP key length */ 287 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 288 &ipsec_esp_keymin, 0, ""); 289 290 /* minimum AH key length */ 291 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 292 &ipsec_ah_keymin, 0, ""); 293 294 /* perfered old SA rather than new SA */ 295 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 296 &key_prefered_oldsa, 0, ""); 297 #endif /* SYSCTL_INT */ 298 299 #define __LIST_CHAINED(elm) \ 300 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 301 #define LIST_INSERT_TAIL(head, elm, type, field) \ 302 do {\ 303 struct type *curelm = LIST_FIRST(head); \ 304 if (curelm == NULL) {\ 305 LIST_INSERT_HEAD(head, elm, field); \ 306 } else { \ 307 while (LIST_NEXT(curelm, field)) \ 308 curelm = LIST_NEXT(curelm, field);\ 309 LIST_INSERT_AFTER(curelm, elm, field);\ 310 }\ 311 } while (0) 312 313 #define KEY_CHKSASTATE(head, sav, name) \ 314 /* do */ { \ 315 if ((head) != (sav)) { \ 316 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 317 (name), (head), (sav))); \ 318 continue; \ 319 } \ 320 } /* while (0) */ 321 322 #define KEY_CHKSPDIR(head, sp, name) \ 323 do { \ 324 if ((head) != (sp)) { \ 325 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 326 "anyway continue.\n", \ 327 (name), (head), (sp))); \ 328 } \ 329 } while (0) 330 331 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management"); 332 333 #if 1 334 #define KMALLOC(p, t, n) \ 335 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT)) 336 #define KFREE(p) \ 337 free((p), M_SECA) 338 #else 339 #define KMALLOC(p, t, n) \ 340 do { \ 341 ((p) = malloc((unsigned long)(n), M_SECA, M_NOWAIT)); \ 342 printf("%s %d: %p <- KMALLOC(%s, %d)\n", \ 343 __FILE__, __LINE__, (p), #t, n); \ 344 } while (0) 345 346 #define KFREE(p) \ 347 do { \ 348 printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \ 349 free((p), M_SECA); \ 350 } while (0) 351 #endif 352 353 /* 354 * set parameters into secpolicyindex buffer. 355 * Must allocate secpolicyindex buffer passed to this function. 356 */ 357 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 358 do { \ 359 memset((idx), 0, sizeof(struct secpolicyindex)); \ 360 (idx)->dir = (_dir); \ 361 (idx)->prefs = (ps); \ 362 (idx)->prefd = (pd); \ 363 (idx)->ul_proto = (ulp); \ 364 memcpy(&(idx)->src, (s), ((const struct sockaddr *)(s))->sa_len); \ 365 memcpy(&(idx)->dst, (d), ((const struct sockaddr *)(d))->sa_len); \ 366 } while (0) 367 368 /* 369 * set parameters into secasindex buffer. 370 * Must allocate secasindex buffer before calling this function. 371 */ 372 static int 373 key_setsecasidx (int, int, int, const struct sadb_address *, 374 const struct sadb_address *, struct secasindex *); 375 376 /* key statistics */ 377 struct _keystat { 378 u_long getspi_count; /* the avarage of count to try to get new SPI */ 379 } keystat; 380 381 struct sadb_msghdr { 382 struct sadb_msg *msg; 383 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 384 int extoff[SADB_EXT_MAX + 1]; 385 int extlen[SADB_EXT_MAX + 1]; 386 }; 387 388 static struct secasvar *key_allocsa_policy (const struct secasindex *); 389 static void key_freesp_so (struct secpolicy **); 390 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int); 391 static void key_delsp (struct secpolicy *); 392 static struct secpolicy *key_getsp (const struct secpolicyindex *); 393 static struct secpolicy *key_getspbyid (u_int32_t); 394 static u_int16_t key_newreqid (void); 395 static struct mbuf *key_gather_mbuf (struct mbuf *, 396 const struct sadb_msghdr *, int, int, ...); 397 static int key_spdadd (struct socket *, struct mbuf *, 398 const struct sadb_msghdr *); 399 static u_int32_t key_getnewspid (void); 400 static int key_spddelete (struct socket *, struct mbuf *, 401 const struct sadb_msghdr *); 402 static int key_spddelete2 (struct socket *, struct mbuf *, 403 const struct sadb_msghdr *); 404 static int key_spdget (struct socket *, struct mbuf *, 405 const struct sadb_msghdr *); 406 static int key_spdflush (struct socket *, struct mbuf *, 407 const struct sadb_msghdr *); 408 static int key_spddump (struct socket *, struct mbuf *, 409 const struct sadb_msghdr *); 410 static struct mbuf * key_setspddump (int *errorp, pid_t); 411 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 412 static int key_nat_map (struct socket *, struct mbuf *, 413 const struct sadb_msghdr *); 414 static struct mbuf *key_setdumpsp (struct secpolicy *, 415 u_int8_t, u_int32_t, pid_t); 416 static u_int key_getspreqmsglen (const struct secpolicy *); 417 static int key_spdexpire (struct secpolicy *); 418 static struct secashead *key_newsah (const struct secasindex *); 419 static void key_delsah (struct secashead *); 420 static struct secasvar *key_newsav (struct mbuf *, 421 const struct sadb_msghdr *, struct secashead *, int *, 422 const char*, int); 423 #define KEY_NEWSAV(m, sadb, sah, e) \ 424 key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 425 static void key_delsav (struct secasvar *); 426 static struct secashead *key_getsah (const struct secasindex *); 427 static struct secasvar *key_checkspidup (const struct secasindex *, u_int32_t); 428 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 429 static int key_setsaval (struct secasvar *, struct mbuf *, 430 const struct sadb_msghdr *); 431 static int key_mature (struct secasvar *); 432 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 433 u_int8_t, u_int32_t, u_int32_t); 434 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 435 static struct mbuf *key_setsadbxtype (u_int16_t); 436 static struct mbuf *key_setsadbxfrag (u_int16_t); 437 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 438 static int key_checksalen (const union sockaddr_union *); 439 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 440 u_int32_t, pid_t, u_int16_t); 441 static struct mbuf *key_setsadbsa (struct secasvar *); 442 static struct mbuf *key_setsadbaddr (u_int16_t, 443 const struct sockaddr *, u_int8_t, u_int16_t); 444 #if 0 445 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 446 int, u_int64_t); 447 #endif 448 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 449 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 450 u_int32_t); 451 static void *key_newbuf (const void *, u_int); 452 #ifdef INET6 453 static int key_ismyaddr6 (const struct sockaddr_in6 *); 454 #endif 455 456 static void sysctl_net_keyv2_setup(struct sysctllog **); 457 static void sysctl_net_key_compat_setup(struct sysctllog **); 458 459 /* flags for key_cmpsaidx() */ 460 #define CMP_HEAD 1 /* protocol, addresses. */ 461 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 462 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 463 #define CMP_EXACTLY 4 /* all elements. */ 464 static int key_cmpsaidx 465 (const struct secasindex *, const struct secasindex *, int); 466 467 static int key_sockaddrcmp (const struct sockaddr *, const struct sockaddr *, int); 468 static int key_bbcmp (const void *, const void *, u_int); 469 static u_int16_t key_satype2proto (u_int8_t); 470 static u_int8_t key_proto2satype (u_int16_t); 471 472 static int key_getspi (struct socket *, struct mbuf *, 473 const struct sadb_msghdr *); 474 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 475 const struct secasindex *); 476 static int key_handle_natt_info (struct secasvar *, 477 const struct sadb_msghdr *); 478 static int key_set_natt_ports (union sockaddr_union *, 479 union sockaddr_union *, 480 const struct sadb_msghdr *); 481 static int key_update (struct socket *, struct mbuf *, 482 const struct sadb_msghdr *); 483 #ifdef IPSEC_DOSEQCHECK 484 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 485 #endif 486 static int key_add (struct socket *, struct mbuf *, 487 const struct sadb_msghdr *); 488 static int key_setident (struct secashead *, struct mbuf *, 489 const struct sadb_msghdr *); 490 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 491 const struct sadb_msghdr *); 492 static int key_delete (struct socket *, struct mbuf *, 493 const struct sadb_msghdr *); 494 static int key_get (struct socket *, struct mbuf *, 495 const struct sadb_msghdr *); 496 497 static void key_getcomb_setlifetime (struct sadb_comb *); 498 static struct mbuf *key_getcomb_esp (void); 499 static struct mbuf *key_getcomb_ah (void); 500 static struct mbuf *key_getcomb_ipcomp (void); 501 static struct mbuf *key_getprop (const struct secasindex *); 502 503 static int key_acquire (const struct secasindex *, struct secpolicy *); 504 #ifndef IPSEC_NONBLOCK_ACQUIRE 505 static struct secacq *key_newacq (const struct secasindex *); 506 static struct secacq *key_getacq (const struct secasindex *); 507 static struct secacq *key_getacqbyseq (u_int32_t); 508 #endif 509 static struct secspacq *key_newspacq (const struct secpolicyindex *); 510 static struct secspacq *key_getspacq (const struct secpolicyindex *); 511 static int key_acquire2 (struct socket *, struct mbuf *, 512 const struct sadb_msghdr *); 513 static int key_register (struct socket *, struct mbuf *, 514 const struct sadb_msghdr *); 515 static int key_expire (struct secasvar *); 516 static int key_flush (struct socket *, struct mbuf *, 517 const struct sadb_msghdr *); 518 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 519 int *lenp, pid_t pid); 520 static int key_dump (struct socket *, struct mbuf *, 521 const struct sadb_msghdr *); 522 static int key_promisc (struct socket *, struct mbuf *, 523 const struct sadb_msghdr *); 524 static int key_senderror (struct socket *, struct mbuf *, int); 525 static int key_validate_ext (const struct sadb_ext *, int); 526 static int key_align (struct mbuf *, struct sadb_msghdr *); 527 #if 0 528 static const char *key_getfqdn (void); 529 static const char *key_getuserfqdn (void); 530 #endif 531 static void key_sa_chgstate (struct secasvar *, u_int8_t); 532 static inline void key_sp_dead (struct secpolicy *); 533 static void key_sp_unlink (struct secpolicy *sp); 534 535 static struct mbuf *key_alloc_mbuf (int); 536 struct callout key_timehandler_ch; 537 538 #ifdef IPSEC_REF_DEBUG 539 #define REFLOG(label, p, where, tag) \ 540 ipseclog((LOG_DEBUG, "%s:%d: " label " : refcnt=%d (%p)\n.", \ 541 (where), (tag), (p)->refcnt, (p))) 542 #else 543 #define REFLOG(label, p, where, tag) do {} while (0) 544 #endif 545 546 #define SA_ADDREF(p) do { \ 547 (p)->refcnt++; \ 548 REFLOG("SA_ADDREF", (p), __func__, __LINE__); \ 549 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 550 } while (0) 551 #define SA_ADDREF2(p, where, tag) do { \ 552 (p)->refcnt++; \ 553 REFLOG("SA_ADDREF", (p), (where), (tag)); \ 554 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 555 } while (0) 556 #define SA_DELREF(p) do { \ 557 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 558 (p)->refcnt--; \ 559 REFLOG("SA_DELREF", (p), __func__, __LINE__); \ 560 } while (0) 561 #define SA_DELREF2(p, where, tag) do { \ 562 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 563 (p)->refcnt--; \ 564 REFLOG("SA_DELREF", (p), (where), (tag)); \ 565 } while (0) 566 567 #define SP_ADDREF(p) do { \ 568 (p)->refcnt++; \ 569 REFLOG("SP_ADDREF", (p), __func__, __LINE__); \ 570 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 571 } while (0) 572 #define SP_ADDREF2(p, where, tag) do { \ 573 (p)->refcnt++; \ 574 REFLOG("SP_ADDREF", (p), (where), (tag)); \ 575 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 576 } while (0) 577 #define SP_DELREF(p) do { \ 578 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 579 (p)->refcnt--; \ 580 REFLOG("SP_DELREF", (p), __func__, __LINE__); \ 581 } while (0) 582 #define SP_DELREF2(p, where, tag) do { \ 583 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 584 (p)->refcnt--; \ 585 REFLOG("SP_DELREF", (p), (where), (tag)); \ 586 } while (0) 587 588 589 static inline void 590 key_sp_dead(struct secpolicy *sp) 591 { 592 593 /* mark the SP dead */ 594 sp->state = IPSEC_SPSTATE_DEAD; 595 } 596 597 static void 598 key_sp_unlink(struct secpolicy *sp) 599 { 600 601 /* remove from SP index */ 602 if (__LIST_CHAINED(sp)) { 603 LIST_REMOVE(sp, chain); 604 /* Release refcount held just for being on chain */ 605 KEY_FREESP(&sp); 606 } 607 } 608 609 610 /* 611 * Return 0 when there are known to be no SP's for the specified 612 * direction. Otherwise return 1. This is used by IPsec code 613 * to optimize performance. 614 */ 615 int 616 key_havesp(u_int dir) 617 { 618 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 619 !LIST_EMPTY(&sptree[dir]) : 1); 620 } 621 622 /* %%% IPsec policy management */ 623 /* 624 * allocating a SP for OUTBOUND or INBOUND packet. 625 * Must call key_freesp() later. 626 * OUT: NULL: not found 627 * others: found and return the pointer. 628 */ 629 struct secpolicy * 630 key_allocsp(const struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 631 { 632 struct secpolicy *sp; 633 int s; 634 635 KASSERT(spidx != NULL); 636 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 637 638 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 639 640 /* get a SP entry */ 641 s = splsoftnet(); /*called from softclock()*/ 642 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 643 printf("*** objects\n"); 644 kdebug_secpolicyindex(spidx); 645 } 646 647 LIST_FOREACH(sp, &sptree[dir], chain) { 648 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 649 printf("*** in SPD\n"); 650 kdebug_secpolicyindex(&sp->spidx); 651 } 652 653 if (sp->state == IPSEC_SPSTATE_DEAD) 654 continue; 655 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 656 goto found; 657 } 658 sp = NULL; 659 found: 660 if (sp) { 661 /* sanity check */ 662 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp"); 663 664 /* found a SPD entry */ 665 sp->lastused = time_uptime; 666 SP_ADDREF2(sp, where, tag); 667 } 668 splx(s); 669 670 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 671 "DP return SP:%p (ID=%u) refcnt %u\n", 672 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 673 return sp; 674 } 675 676 /* 677 * allocating a SP for OUTBOUND or INBOUND packet. 678 * Must call key_freesp() later. 679 * OUT: NULL: not found 680 * others: found and return the pointer. 681 */ 682 struct secpolicy * 683 key_allocsp2(u_int32_t spi, 684 const union sockaddr_union *dst, 685 u_int8_t proto, 686 u_int dir, 687 const char* where, int tag) 688 { 689 struct secpolicy *sp; 690 int s; 691 692 KASSERT(dst != NULL); 693 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 694 695 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 696 697 /* get a SP entry */ 698 s = splsoftnet(); /*called from softclock()*/ 699 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 700 printf("*** objects\n"); 701 printf("spi %u proto %u dir %u\n", spi, proto, dir); 702 kdebug_sockaddr(&dst->sa); 703 } 704 705 LIST_FOREACH(sp, &sptree[dir], chain) { 706 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 707 printf("*** in SPD\n"); 708 kdebug_secpolicyindex(&sp->spidx); 709 } 710 711 if (sp->state == IPSEC_SPSTATE_DEAD) 712 continue; 713 /* compare simple values, then dst address */ 714 if (sp->spidx.ul_proto != proto) 715 continue; 716 /* NB: spi's must exist and match */ 717 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 718 continue; 719 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, PORT_STRICT) == 0) 720 goto found; 721 } 722 sp = NULL; 723 found: 724 if (sp) { 725 /* sanity check */ 726 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2"); 727 728 /* found a SPD entry */ 729 sp->lastused = time_uptime; 730 SP_ADDREF2(sp, where, tag); 731 } 732 splx(s); 733 734 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 735 "DP return SP:%p (ID=%u) refcnt %u\n", 736 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 737 return sp; 738 } 739 740 /* 741 * return a policy that matches this particular inbound packet. 742 * XXX slow 743 */ 744 struct secpolicy * 745 key_gettunnel(const struct sockaddr *osrc, 746 const struct sockaddr *odst, 747 const struct sockaddr *isrc, 748 const struct sockaddr *idst, 749 const char* where, int tag) 750 { 751 struct secpolicy *sp; 752 const int dir = IPSEC_DIR_INBOUND; 753 int s; 754 struct ipsecrequest *r1, *r2, *p; 755 struct secpolicyindex spidx; 756 757 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 758 759 if (isrc->sa_family != idst->sa_family) { 760 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.", 761 isrc->sa_family, idst->sa_family)); 762 sp = NULL; 763 goto done; 764 } 765 766 s = splsoftnet(); /*called from softclock()*/ 767 LIST_FOREACH(sp, &sptree[dir], chain) { 768 if (sp->state == IPSEC_SPSTATE_DEAD) 769 continue; 770 771 r1 = r2 = NULL; 772 for (p = sp->req; p; p = p->next) { 773 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 774 continue; 775 776 r1 = r2; 777 r2 = p; 778 779 if (!r1) { 780 /* here we look at address matches only */ 781 spidx = sp->spidx; 782 if (isrc->sa_len > sizeof(spidx.src) || 783 idst->sa_len > sizeof(spidx.dst)) 784 continue; 785 memcpy(&spidx.src, isrc, isrc->sa_len); 786 memcpy(&spidx.dst, idst, idst->sa_len); 787 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 788 continue; 789 } else { 790 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, PORT_NONE) || 791 key_sockaddrcmp(&r1->saidx.dst.sa, idst, PORT_NONE)) 792 continue; 793 } 794 795 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, PORT_NONE) || 796 key_sockaddrcmp(&r2->saidx.dst.sa, odst, PORT_NONE)) 797 continue; 798 799 goto found; 800 } 801 } 802 sp = NULL; 803 found: 804 if (sp) { 805 sp->lastused = time_uptime; 806 SP_ADDREF2(sp, where, tag); 807 } 808 splx(s); 809 done: 810 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 811 "DP return SP:%p (ID=%u) refcnt %u\n", 812 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 813 return sp; 814 } 815 816 /* 817 * allocating an SA entry for an *OUTBOUND* packet. 818 * checking each request entries in SP, and acquire an SA if need. 819 * OUT: 0: there are valid requests. 820 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 821 */ 822 int 823 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 824 { 825 u_int level; 826 int error; 827 828 KASSERT(isr != NULL); 829 KASSERT(saidx != NULL); 830 KASSERTMSG(saidx->mode == IPSEC_MODE_TRANSPORT || 831 saidx->mode == IPSEC_MODE_TUNNEL, 832 "unexpected policy %u", saidx->mode); 833 834 /* get current level */ 835 level = ipsec_get_reqlevel(isr); 836 837 /* 838 * XXX guard against protocol callbacks from the crypto 839 * thread as they reference ipsecrequest.sav which we 840 * temporarily null out below. Need to rethink how we 841 * handle bundled SA's in the callback thread. 842 */ 843 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 844 #if 0 845 /* 846 * We do allocate new SA only if the state of SA in the holder is 847 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 848 */ 849 if (isr->sav != NULL) { 850 if (isr->sav->sah == NULL) 851 panic("key_checkrequest: sah is null"); 852 if (isr->sav == (struct secasvar *)LIST_FIRST( 853 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 854 KEY_FREESAV(&isr->sav); 855 isr->sav = NULL; 856 } 857 } 858 #else 859 /* 860 * we free any SA stashed in the IPsec request because a different 861 * SA may be involved each time this request is checked, either 862 * because new SAs are being configured, or this request is 863 * associated with an unconnected datagram socket, or this request 864 * is associated with a system default policy. 865 * 866 * The operation may have negative impact to performance. We may 867 * want to check cached SA carefully, rather than picking new SA 868 * every time. 869 */ 870 if (isr->sav != NULL) { 871 KEY_FREESAV(&isr->sav); 872 isr->sav = NULL; 873 } 874 #endif 875 876 /* 877 * new SA allocation if no SA found. 878 * key_allocsa_policy should allocate the oldest SA available. 879 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 880 */ 881 if (isr->sav == NULL) 882 isr->sav = key_allocsa_policy(saidx); 883 884 /* When there is SA. */ 885 if (isr->sav != NULL) { 886 if (isr->sav->state != SADB_SASTATE_MATURE && 887 isr->sav->state != SADB_SASTATE_DYING) 888 return EINVAL; 889 return 0; 890 } 891 892 /* there is no SA */ 893 error = key_acquire(saidx, isr->sp); 894 if (error != 0) { 895 /* XXX What should I do ? */ 896 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " 897 "from key_acquire.\n", error)); 898 return error; 899 } 900 901 if (level != IPSEC_LEVEL_REQUIRE) { 902 /* XXX sigh, the interface to this routine is botched */ 903 KASSERTMSG(isr->sav == NULL, "unexpected SA"); 904 return 0; 905 } else { 906 return ENOENT; 907 } 908 } 909 910 /* 911 * allocating a SA for policy entry from SAD. 912 * NOTE: searching SAD of aliving state. 913 * OUT: NULL: not found. 914 * others: found and return the pointer. 915 */ 916 static struct secasvar * 917 key_allocsa_policy(const struct secasindex *saidx) 918 { 919 struct secashead *sah; 920 struct secasvar *sav; 921 u_int stateidx, state; 922 const u_int *saorder_state_valid; 923 int arraysize; 924 925 LIST_FOREACH(sah, &sahtree, chain) { 926 if (sah->state == SADB_SASTATE_DEAD) 927 continue; 928 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) 929 goto found; 930 } 931 932 return NULL; 933 934 found: 935 936 /* 937 * search a valid state list for outbound packet. 938 * This search order is important. 939 */ 940 if (key_prefered_oldsa) { 941 saorder_state_valid = saorder_state_valid_prefer_old; 942 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 943 } else { 944 saorder_state_valid = saorder_state_valid_prefer_new; 945 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 946 } 947 948 /* search valid state */ 949 for (stateidx = 0; 950 stateidx < arraysize; 951 stateidx++) { 952 953 state = saorder_state_valid[stateidx]; 954 955 sav = key_do_allocsa_policy(sah, state); 956 if (sav != NULL) 957 return sav; 958 } 959 960 return NULL; 961 } 962 963 /* 964 * searching SAD with direction, protocol, mode and state. 965 * called by key_allocsa_policy(). 966 * OUT: 967 * NULL : not found 968 * others : found, pointer to a SA. 969 */ 970 static struct secasvar * 971 key_do_allocsa_policy(struct secashead *sah, u_int state) 972 { 973 struct secasvar *sav, *candidate, *d; 974 975 /* initilize */ 976 candidate = NULL; 977 978 LIST_FOREACH(sav, &sah->savtree[state], chain) { 979 /* sanity check */ 980 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy"); 981 982 /* initialize */ 983 if (candidate == NULL) { 984 candidate = sav; 985 continue; 986 } 987 988 /* Which SA is the better ? */ 989 990 /* sanity check 2 */ 991 KASSERT(candidate->lft_c != NULL); 992 KASSERT(sav->lft_c != NULL); 993 994 /* What the best method is to compare ? */ 995 if (key_prefered_oldsa) { 996 if (candidate->lft_c->sadb_lifetime_addtime > 997 sav->lft_c->sadb_lifetime_addtime) { 998 candidate = sav; 999 } 1000 continue; 1001 /*NOTREACHED*/ 1002 } 1003 1004 /* prefered new sa rather than old sa */ 1005 if (candidate->lft_c->sadb_lifetime_addtime < 1006 sav->lft_c->sadb_lifetime_addtime) { 1007 d = candidate; 1008 candidate = sav; 1009 } else 1010 d = sav; 1011 1012 /* 1013 * prepared to delete the SA when there is more 1014 * suitable candidate and the lifetime of the SA is not 1015 * permanent. 1016 */ 1017 if (d->lft_c->sadb_lifetime_addtime != 0) { 1018 struct mbuf *m, *result = 0; 1019 uint8_t satype; 1020 1021 key_sa_chgstate(d, SADB_SASTATE_DEAD); 1022 1023 KASSERT(d->refcnt > 0); 1024 1025 satype = key_proto2satype(d->sah->saidx.proto); 1026 if (satype == 0) 1027 goto msgfail; 1028 1029 m = key_setsadbmsg(SADB_DELETE, 0, 1030 satype, 0, 0, d->refcnt - 1); 1031 if (!m) 1032 goto msgfail; 1033 result = m; 1034 1035 /* set sadb_address for saidx's. */ 1036 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1037 &d->sah->saidx.src.sa, 1038 d->sah->saidx.src.sa.sa_len << 3, 1039 IPSEC_ULPROTO_ANY); 1040 if (!m) 1041 goto msgfail; 1042 m_cat(result, m); 1043 1044 /* set sadb_address for saidx's. */ 1045 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1046 &d->sah->saidx.src.sa, 1047 d->sah->saidx.src.sa.sa_len << 3, 1048 IPSEC_ULPROTO_ANY); 1049 if (!m) 1050 goto msgfail; 1051 m_cat(result, m); 1052 1053 /* create SA extension */ 1054 m = key_setsadbsa(d); 1055 if (!m) 1056 goto msgfail; 1057 m_cat(result, m); 1058 1059 if (result->m_len < sizeof(struct sadb_msg)) { 1060 result = m_pullup(result, 1061 sizeof(struct sadb_msg)); 1062 if (result == NULL) 1063 goto msgfail; 1064 } 1065 1066 result->m_pkthdr.len = 0; 1067 for (m = result; m; m = m->m_next) 1068 result->m_pkthdr.len += m->m_len; 1069 mtod(result, struct sadb_msg *)->sadb_msg_len = 1070 PFKEY_UNIT64(result->m_pkthdr.len); 1071 1072 key_sendup_mbuf(NULL, result, 1073 KEY_SENDUP_REGISTERED); 1074 result = 0; 1075 msgfail: 1076 if (result) 1077 m_freem(result); 1078 KEY_FREESAV(&d); 1079 } 1080 } 1081 1082 if (candidate) { 1083 SA_ADDREF(candidate); 1084 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1085 "DP cause refcnt++:%d SA:%p\n", 1086 candidate->refcnt, candidate); 1087 } 1088 return candidate; 1089 } 1090 1091 /* 1092 * allocating a usable SA entry for a *INBOUND* packet. 1093 * Must call key_freesav() later. 1094 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1095 * NULL: not found, or error occurred. 1096 * 1097 * In the comparison, no source address is used--for RFC2401 conformance. 1098 * To quote, from section 4.1: 1099 * A security association is uniquely identified by a triple consisting 1100 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1101 * security protocol (AH or ESP) identifier. 1102 * Note that, however, we do need to keep source address in IPsec SA. 1103 * IKE specification and PF_KEY specification do assume that we 1104 * keep source address in IPsec SA. We see a tricky situation here. 1105 * 1106 * sport and dport are used for NAT-T. network order is always used. 1107 */ 1108 struct secasvar * 1109 key_allocsa( 1110 const union sockaddr_union *dst, 1111 u_int proto, 1112 u_int32_t spi, 1113 u_int16_t sport, 1114 u_int16_t dport, 1115 const char* where, int tag) 1116 { 1117 struct secashead *sah; 1118 struct secasvar *sav; 1119 u_int stateidx, state; 1120 const u_int *saorder_state_valid; 1121 int arraysize, chkport; 1122 int s; 1123 1124 int must_check_spi = 1; 1125 int must_check_alg = 0; 1126 u_int16_t cpi = 0; 1127 u_int8_t algo = 0; 1128 1129 if ((sport != 0) && (dport != 0)) 1130 chkport = PORT_STRICT; 1131 else 1132 chkport = PORT_NONE; 1133 1134 KASSERT(dst != NULL); 1135 1136 /* 1137 * XXX IPCOMP case 1138 * We use cpi to define spi here. In the case where cpi <= 1139 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1140 * the real spi. In this case, don't check the spi but check the 1141 * algorithm 1142 */ 1143 1144 if (proto == IPPROTO_IPCOMP) { 1145 u_int32_t tmp; 1146 tmp = ntohl(spi); 1147 cpi = (u_int16_t) tmp; 1148 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1149 algo = (u_int8_t) cpi; 1150 must_check_spi = 0; 1151 must_check_alg = 1; 1152 } 1153 } 1154 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1155 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1156 where, tag, must_check_spi, must_check_alg); 1157 1158 1159 /* 1160 * searching SAD. 1161 * XXX: to be checked internal IP header somewhere. Also when 1162 * IPsec tunnel packet is received. But ESP tunnel mode is 1163 * encrypted so we can't check internal IP header. 1164 */ 1165 s = splsoftnet(); /*called from softclock()*/ 1166 if (key_prefered_oldsa) { 1167 saorder_state_valid = saorder_state_valid_prefer_old; 1168 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1169 } else { 1170 saorder_state_valid = saorder_state_valid_prefer_new; 1171 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1172 } 1173 LIST_FOREACH(sah, &sahtree, chain) { 1174 /* search valid state */ 1175 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1176 state = saorder_state_valid[stateidx]; 1177 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1178 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1179 "try match spi %#x, %#x\n", 1180 ntohl(spi), ntohl(sav->spi)); 1181 /* sanity check */ 1182 KEY_CHKSASTATE(sav->state, state, "key_allocsav"); 1183 /* do not return entries w/ unusable state */ 1184 if (sav->state != SADB_SASTATE_MATURE && 1185 sav->state != SADB_SASTATE_DYING) { 1186 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1187 "bad state %d\n", sav->state); 1188 continue; 1189 } 1190 if (proto != sav->sah->saidx.proto) { 1191 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1192 "proto fail %d != %d\n", 1193 proto, sav->sah->saidx.proto); 1194 continue; 1195 } 1196 if (must_check_spi && spi != sav->spi) { 1197 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1198 "spi fail %#x != %#x\n", 1199 ntohl(spi), ntohl(sav->spi)); 1200 continue; 1201 } 1202 /* XXX only on the ipcomp case */ 1203 if (must_check_alg && algo != sav->alg_comp) { 1204 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1205 "algo fail %d != %d\n", 1206 algo, sav->alg_comp); 1207 continue; 1208 } 1209 1210 #if 0 /* don't check src */ 1211 /* Fix port in src->sa */ 1212 1213 /* check src address */ 1214 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE) != 0) 1215 continue; 1216 #endif 1217 /* fix port of dst address XXX*/ 1218 key_porttosaddr(__UNCONST(dst), dport); 1219 /* check dst address */ 1220 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1221 continue; 1222 SA_ADDREF2(sav, where, tag); 1223 goto done; 1224 } 1225 } 1226 } 1227 sav = NULL; 1228 done: 1229 splx(s); 1230 1231 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1232 "DP return SA:%p; refcnt %u\n", sav, sav ? sav->refcnt : 0); 1233 return sav; 1234 } 1235 1236 /* 1237 * Must be called after calling key_allocsp(). 1238 * For both the packet without socket and key_freeso(). 1239 */ 1240 void 1241 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1242 { 1243 struct secpolicy *sp = *spp; 1244 1245 KASSERT(sp != NULL); 1246 1247 SP_DELREF2(sp, where, tag); 1248 1249 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1250 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1251 sp, sp->id, where, tag, sp->refcnt); 1252 1253 if (sp->refcnt == 0) { 1254 *spp = NULL; 1255 key_delsp(sp); 1256 } 1257 } 1258 1259 /* 1260 * Must be called after calling key_allocsp(). 1261 * For the packet with socket. 1262 */ 1263 void 1264 key_freeso(struct socket *so) 1265 { 1266 /* sanity check */ 1267 KASSERT(so != NULL); 1268 1269 switch (so->so_proto->pr_domain->dom_family) { 1270 #ifdef INET 1271 case PF_INET: 1272 { 1273 struct inpcb *pcb = sotoinpcb(so); 1274 1275 /* Does it have a PCB ? */ 1276 if (pcb == NULL) 1277 return; 1278 1279 struct inpcbpolicy *sp = pcb->inp_sp; 1280 key_freesp_so(&sp->sp_in); 1281 key_freesp_so(&sp->sp_out); 1282 } 1283 break; 1284 #endif 1285 #ifdef INET6 1286 case PF_INET6: 1287 { 1288 #ifdef HAVE_NRL_INPCB 1289 struct inpcb *pcb = sotoinpcb(so); 1290 struct inpcbpolicy *sp = pcb->inp_sp; 1291 1292 /* Does it have a PCB ? */ 1293 if (pcb == NULL) 1294 return; 1295 key_freesp_so(&sp->sp_in); 1296 key_freesp_so(&sp->sp_out); 1297 #else 1298 struct in6pcb *pcb = sotoin6pcb(so); 1299 1300 /* Does it have a PCB ? */ 1301 if (pcb == NULL) 1302 return; 1303 key_freesp_so(&pcb->in6p_sp->sp_in); 1304 key_freesp_so(&pcb->in6p_sp->sp_out); 1305 #endif 1306 } 1307 break; 1308 #endif /* INET6 */ 1309 default: 1310 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1311 so->so_proto->pr_domain->dom_family)); 1312 return; 1313 } 1314 } 1315 1316 static void 1317 key_freesp_so(struct secpolicy **sp) 1318 { 1319 1320 KASSERT(sp != NULL); 1321 KASSERT(*sp != NULL); 1322 1323 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1324 (*sp)->policy == IPSEC_POLICY_BYPASS) 1325 return; 1326 1327 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1328 "invalid policy %u", (*sp)->policy); 1329 KEY_FREESP(sp); 1330 } 1331 1332 /* 1333 * Must be called after calling key_allocsa(). 1334 * This function is called by key_freesp() to free some SA allocated 1335 * for a policy. 1336 */ 1337 void 1338 key_freesav(struct secasvar **psav, const char* where, int tag) 1339 { 1340 struct secasvar *sav = *psav; 1341 1342 KASSERT(sav != NULL); 1343 1344 SA_DELREF2(sav, where, tag); 1345 1346 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1347 "DP SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1348 sav, (u_long)ntohl(sav->spi), where, tag, sav->refcnt); 1349 1350 if (sav->refcnt == 0) { 1351 *psav = NULL; 1352 key_delsav(sav); 1353 } 1354 } 1355 1356 /* %%% SPD management */ 1357 /* 1358 * free security policy entry. 1359 */ 1360 static void 1361 key_delsp(struct secpolicy *sp) 1362 { 1363 int s; 1364 1365 KASSERT(sp != NULL); 1366 1367 key_sp_dead(sp); 1368 1369 KASSERTMSG(sp->refcnt == 0, 1370 "SP with references deleted (refcnt %u)", sp->refcnt); 1371 1372 s = splsoftnet(); /*called from softclock()*/ 1373 1374 { 1375 struct ipsecrequest *isr = sp->req, *nextisr; 1376 1377 while (isr != NULL) { 1378 if (isr->sav != NULL) { 1379 KEY_FREESAV(&isr->sav); 1380 isr->sav = NULL; 1381 } 1382 1383 nextisr = isr->next; 1384 KFREE(isr); 1385 isr = nextisr; 1386 } 1387 } 1388 1389 KFREE(sp); 1390 1391 splx(s); 1392 } 1393 1394 /* 1395 * search SPD 1396 * OUT: NULL : not found 1397 * others : found, pointer to a SP. 1398 */ 1399 static struct secpolicy * 1400 key_getsp(const struct secpolicyindex *spidx) 1401 { 1402 struct secpolicy *sp; 1403 1404 KASSERT(spidx != NULL); 1405 1406 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1407 if (sp->state == IPSEC_SPSTATE_DEAD) 1408 continue; 1409 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1410 SP_ADDREF(sp); 1411 return sp; 1412 } 1413 } 1414 1415 return NULL; 1416 } 1417 1418 /* 1419 * get SP by index. 1420 * OUT: NULL : not found 1421 * others : found, pointer to a SP. 1422 */ 1423 static struct secpolicy * 1424 key_getspbyid(u_int32_t id) 1425 { 1426 struct secpolicy *sp; 1427 1428 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1429 if (sp->state == IPSEC_SPSTATE_DEAD) 1430 continue; 1431 if (sp->id == id) { 1432 SP_ADDREF(sp); 1433 return sp; 1434 } 1435 } 1436 1437 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1438 if (sp->state == IPSEC_SPSTATE_DEAD) 1439 continue; 1440 if (sp->id == id) { 1441 SP_ADDREF(sp); 1442 return sp; 1443 } 1444 } 1445 1446 return NULL; 1447 } 1448 1449 struct secpolicy * 1450 key_newsp(const char* where, int tag) 1451 { 1452 struct secpolicy *newsp = NULL; 1453 1454 newsp = (struct secpolicy *) 1455 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); 1456 if (newsp) { 1457 newsp->refcnt = 1; 1458 newsp->req = NULL; 1459 } 1460 1461 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1462 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1463 return newsp; 1464 } 1465 1466 /* 1467 * create secpolicy structure from sadb_x_policy structure. 1468 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1469 * so must be set properly later. 1470 */ 1471 struct secpolicy * 1472 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1473 { 1474 struct secpolicy *newsp; 1475 1476 KASSERT(xpl0 != NULL); 1477 KASSERT(len >= sizeof(*xpl0)); 1478 1479 if (len != PFKEY_EXTLEN(xpl0)) { 1480 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1481 *error = EINVAL; 1482 return NULL; 1483 } 1484 1485 if ((newsp = KEY_NEWSP()) == NULL) { 1486 *error = ENOBUFS; 1487 return NULL; 1488 } 1489 1490 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1491 newsp->policy = xpl0->sadb_x_policy_type; 1492 1493 /* check policy */ 1494 switch (xpl0->sadb_x_policy_type) { 1495 case IPSEC_POLICY_DISCARD: 1496 case IPSEC_POLICY_NONE: 1497 case IPSEC_POLICY_ENTRUST: 1498 case IPSEC_POLICY_BYPASS: 1499 newsp->req = NULL; 1500 *error = 0; 1501 return newsp; 1502 1503 case IPSEC_POLICY_IPSEC: 1504 /* Continued */ 1505 break; 1506 default: 1507 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1508 KEY_FREESP(&newsp); 1509 *error = EINVAL; 1510 return NULL; 1511 } 1512 1513 /* IPSEC_POLICY_IPSEC */ 1514 { 1515 int tlen; 1516 const struct sadb_x_ipsecrequest *xisr; 1517 uint16_t xisr_reqid; 1518 struct ipsecrequest **p_isr = &newsp->req; 1519 1520 /* validity check */ 1521 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1522 ipseclog((LOG_DEBUG, 1523 "key_msg2sp: Invalid msg length.\n")); 1524 *error = EINVAL; 1525 goto free_exit; 1526 } 1527 1528 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1529 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1530 1531 while (tlen > 0) { 1532 /* length check */ 1533 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1534 ipseclog((LOG_DEBUG, "key_msg2sp: " 1535 "invalid ipsecrequest length.\n")); 1536 *error = EINVAL; 1537 goto free_exit; 1538 } 1539 1540 /* allocate request buffer */ 1541 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); 1542 if ((*p_isr) == NULL) { 1543 ipseclog((LOG_DEBUG, 1544 "key_msg2sp: No more memory.\n")); 1545 *error = ENOBUFS; 1546 goto free_exit; 1547 } 1548 memset(*p_isr, 0, sizeof(**p_isr)); 1549 1550 /* set values */ 1551 (*p_isr)->next = NULL; 1552 1553 switch (xisr->sadb_x_ipsecrequest_proto) { 1554 case IPPROTO_ESP: 1555 case IPPROTO_AH: 1556 case IPPROTO_IPCOMP: 1557 break; 1558 default: 1559 ipseclog((LOG_DEBUG, 1560 "key_msg2sp: invalid proto type=%u\n", 1561 xisr->sadb_x_ipsecrequest_proto)); 1562 *error = EPROTONOSUPPORT; 1563 goto free_exit; 1564 } 1565 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1566 1567 switch (xisr->sadb_x_ipsecrequest_mode) { 1568 case IPSEC_MODE_TRANSPORT: 1569 case IPSEC_MODE_TUNNEL: 1570 break; 1571 case IPSEC_MODE_ANY: 1572 default: 1573 ipseclog((LOG_DEBUG, 1574 "key_msg2sp: invalid mode=%u\n", 1575 xisr->sadb_x_ipsecrequest_mode)); 1576 *error = EINVAL; 1577 goto free_exit; 1578 } 1579 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1580 1581 switch (xisr->sadb_x_ipsecrequest_level) { 1582 case IPSEC_LEVEL_DEFAULT: 1583 case IPSEC_LEVEL_USE: 1584 case IPSEC_LEVEL_REQUIRE: 1585 break; 1586 case IPSEC_LEVEL_UNIQUE: 1587 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1588 /* validity check */ 1589 /* 1590 * If range violation of reqid, kernel will 1591 * update it, don't refuse it. 1592 */ 1593 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1594 ipseclog((LOG_DEBUG, 1595 "key_msg2sp: reqid=%d range " 1596 "violation, updated by kernel.\n", 1597 xisr_reqid)); 1598 xisr_reqid = 0; 1599 } 1600 1601 /* allocate new reqid id if reqid is zero. */ 1602 if (xisr_reqid == 0) { 1603 u_int16_t reqid; 1604 if ((reqid = key_newreqid()) == 0) { 1605 *error = ENOBUFS; 1606 goto free_exit; 1607 } 1608 (*p_isr)->saidx.reqid = reqid; 1609 } else { 1610 /* set it for manual keying. */ 1611 (*p_isr)->saidx.reqid = xisr_reqid; 1612 } 1613 break; 1614 1615 default: 1616 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1617 xisr->sadb_x_ipsecrequest_level)); 1618 *error = EINVAL; 1619 goto free_exit; 1620 } 1621 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1622 1623 /* set IP addresses if there */ 1624 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1625 const struct sockaddr *paddr; 1626 1627 paddr = (const struct sockaddr *)(xisr + 1); 1628 1629 /* validity check */ 1630 if (paddr->sa_len 1631 > sizeof((*p_isr)->saidx.src)) { 1632 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1633 "address length.\n")); 1634 *error = EINVAL; 1635 goto free_exit; 1636 } 1637 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1638 1639 paddr = (const struct sockaddr *)((const char *)paddr 1640 + paddr->sa_len); 1641 1642 /* validity check */ 1643 if (paddr->sa_len 1644 > sizeof((*p_isr)->saidx.dst)) { 1645 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1646 "address length.\n")); 1647 *error = EINVAL; 1648 goto free_exit; 1649 } 1650 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1651 } 1652 1653 (*p_isr)->sav = NULL; 1654 (*p_isr)->sp = newsp; 1655 1656 /* initialization for the next. */ 1657 p_isr = &(*p_isr)->next; 1658 tlen -= xisr->sadb_x_ipsecrequest_len; 1659 1660 /* validity check */ 1661 if (tlen < 0) { 1662 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1663 *error = EINVAL; 1664 goto free_exit; 1665 } 1666 1667 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr 1668 + xisr->sadb_x_ipsecrequest_len); 1669 } 1670 } 1671 1672 *error = 0; 1673 return newsp; 1674 1675 free_exit: 1676 KEY_FREESP(&newsp); 1677 return NULL; 1678 } 1679 1680 static u_int16_t 1681 key_newreqid(void) 1682 { 1683 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1684 1685 auto_reqid = (auto_reqid == 0xffff 1686 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1687 1688 /* XXX should be unique check */ 1689 1690 return auto_reqid; 1691 } 1692 1693 /* 1694 * copy secpolicy struct to sadb_x_policy structure indicated. 1695 */ 1696 struct mbuf * 1697 key_sp2msg(const struct secpolicy *sp) 1698 { 1699 struct sadb_x_policy *xpl; 1700 int tlen; 1701 char *p; 1702 struct mbuf *m; 1703 1704 KASSERT(sp != NULL); 1705 1706 tlen = key_getspreqmsglen(sp); 1707 1708 m = key_alloc_mbuf(tlen); 1709 if (!m || m->m_next) { /*XXX*/ 1710 if (m) 1711 m_freem(m); 1712 return NULL; 1713 } 1714 1715 m->m_len = tlen; 1716 m->m_next = NULL; 1717 xpl = mtod(m, struct sadb_x_policy *); 1718 memset(xpl, 0, tlen); 1719 1720 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1721 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1722 xpl->sadb_x_policy_type = sp->policy; 1723 xpl->sadb_x_policy_dir = sp->spidx.dir; 1724 xpl->sadb_x_policy_id = sp->id; 1725 p = (char *)xpl + sizeof(*xpl); 1726 1727 /* if is the policy for ipsec ? */ 1728 if (sp->policy == IPSEC_POLICY_IPSEC) { 1729 struct sadb_x_ipsecrequest *xisr; 1730 struct ipsecrequest *isr; 1731 1732 for (isr = sp->req; isr != NULL; isr = isr->next) { 1733 1734 xisr = (struct sadb_x_ipsecrequest *)p; 1735 1736 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1737 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1738 xisr->sadb_x_ipsecrequest_level = isr->level; 1739 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1740 1741 p += sizeof(*xisr); 1742 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1743 p += isr->saidx.src.sa.sa_len; 1744 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1745 p += isr->saidx.src.sa.sa_len; 1746 1747 xisr->sadb_x_ipsecrequest_len = 1748 PFKEY_ALIGN8(sizeof(*xisr) 1749 + isr->saidx.src.sa.sa_len 1750 + isr->saidx.dst.sa.sa_len); 1751 } 1752 } 1753 1754 return m; 1755 } 1756 1757 /* m will not be freed nor modified */ 1758 static struct mbuf * 1759 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1760 int ndeep, int nitem, ...) 1761 { 1762 va_list ap; 1763 int idx; 1764 int i; 1765 struct mbuf *result = NULL, *n; 1766 int len; 1767 1768 KASSERT(m != NULL); 1769 KASSERT(mhp != NULL); 1770 1771 va_start(ap, nitem); 1772 for (i = 0; i < nitem; i++) { 1773 idx = va_arg(ap, int); 1774 if (idx < 0 || idx > SADB_EXT_MAX) 1775 goto fail; 1776 /* don't attempt to pull empty extension */ 1777 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1778 continue; 1779 if (idx != SADB_EXT_RESERVED && 1780 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1781 continue; 1782 1783 if (idx == SADB_EXT_RESERVED) { 1784 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 1785 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1786 MGETHDR(n, M_DONTWAIT, MT_DATA); 1787 if (!n) 1788 goto fail; 1789 n->m_len = len; 1790 n->m_next = NULL; 1791 m_copydata(m, 0, sizeof(struct sadb_msg), 1792 mtod(n, void *)); 1793 } else if (i < ndeep) { 1794 len = mhp->extlen[idx]; 1795 n = key_alloc_mbuf(len); 1796 if (!n || n->m_next) { /*XXX*/ 1797 if (n) 1798 m_freem(n); 1799 goto fail; 1800 } 1801 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1802 mtod(n, void *)); 1803 } else { 1804 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1805 M_DONTWAIT); 1806 } 1807 if (n == NULL) 1808 goto fail; 1809 1810 if (result) 1811 m_cat(result, n); 1812 else 1813 result = n; 1814 } 1815 va_end(ap); 1816 1817 if (result && (result->m_flags & M_PKTHDR) != 0) { 1818 result->m_pkthdr.len = 0; 1819 for (n = result; n; n = n->m_next) 1820 result->m_pkthdr.len += n->m_len; 1821 } 1822 1823 return result; 1824 1825 fail: 1826 va_end(ap); 1827 m_freem(result); 1828 return NULL; 1829 } 1830 1831 /* 1832 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1833 * add an entry to SP database, when received 1834 * <base, address(SD), (lifetime(H),) policy> 1835 * from the user(?). 1836 * Adding to SP database, 1837 * and send 1838 * <base, address(SD), (lifetime(H),) policy> 1839 * to the socket which was send. 1840 * 1841 * SPDADD set a unique policy entry. 1842 * SPDSETIDX like SPDADD without a part of policy requests. 1843 * SPDUPDATE replace a unique policy entry. 1844 * 1845 * m will always be freed. 1846 */ 1847 static int 1848 key_spdadd(struct socket *so, struct mbuf *m, 1849 const struct sadb_msghdr *mhp) 1850 { 1851 const struct sadb_address *src0, *dst0; 1852 const struct sadb_x_policy *xpl0; 1853 struct sadb_x_policy *xpl; 1854 const struct sadb_lifetime *lft = NULL; 1855 struct secpolicyindex spidx; 1856 struct secpolicy *newsp; 1857 int error; 1858 1859 KASSERT(so != NULL); 1860 KASSERT(m != NULL); 1861 KASSERT(mhp != NULL); 1862 KASSERT(mhp->msg != NULL); 1863 1864 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1865 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1866 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1867 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1868 return key_senderror(so, m, EINVAL); 1869 } 1870 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1871 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1872 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1873 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1874 return key_senderror(so, m, EINVAL); 1875 } 1876 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1877 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1878 < sizeof(struct sadb_lifetime)) { 1879 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1880 return key_senderror(so, m, EINVAL); 1881 } 1882 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1883 } 1884 1885 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1886 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1887 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1888 1889 /* make secindex */ 1890 /* XXX boundary check against sa_len */ 1891 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1892 src0 + 1, 1893 dst0 + 1, 1894 src0->sadb_address_prefixlen, 1895 dst0->sadb_address_prefixlen, 1896 src0->sadb_address_proto, 1897 &spidx); 1898 1899 /* checking the direciton. */ 1900 switch (xpl0->sadb_x_policy_dir) { 1901 case IPSEC_DIR_INBOUND: 1902 case IPSEC_DIR_OUTBOUND: 1903 break; 1904 default: 1905 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1906 mhp->msg->sadb_msg_errno = EINVAL; 1907 return 0; 1908 } 1909 1910 /* check policy */ 1911 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1912 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1913 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1914 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1915 return key_senderror(so, m, EINVAL); 1916 } 1917 1918 /* policy requests are mandatory when action is ipsec. */ 1919 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && 1920 xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 1921 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1922 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1923 return key_senderror(so, m, EINVAL); 1924 } 1925 1926 /* 1927 * checking there is SP already or not. 1928 * SPDUPDATE doesn't depend on whether there is a SP or not. 1929 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1930 * then error. 1931 */ 1932 newsp = key_getsp(&spidx); 1933 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1934 if (newsp) { 1935 key_sp_dead(newsp); 1936 key_sp_unlink(newsp); /* XXX jrs ordering */ 1937 KEY_FREESP(&newsp); 1938 newsp = NULL; 1939 } 1940 } else { 1941 if (newsp != NULL) { 1942 KEY_FREESP(&newsp); 1943 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1944 return key_senderror(so, m, EEXIST); 1945 } 1946 } 1947 1948 /* allocation new SP entry */ 1949 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1950 return key_senderror(so, m, error); 1951 } 1952 1953 if ((newsp->id = key_getnewspid()) == 0) { 1954 KFREE(newsp); 1955 return key_senderror(so, m, ENOBUFS); 1956 } 1957 1958 /* XXX boundary check against sa_len */ 1959 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1960 src0 + 1, 1961 dst0 + 1, 1962 src0->sadb_address_prefixlen, 1963 dst0->sadb_address_prefixlen, 1964 src0->sadb_address_proto, 1965 &newsp->spidx); 1966 1967 /* sanity check on addr pair */ 1968 if (((const struct sockaddr *)(src0 + 1))->sa_family != 1969 ((const struct sockaddr *)(dst0+ 1))->sa_family) { 1970 KFREE(newsp); 1971 return key_senderror(so, m, EINVAL); 1972 } 1973 if (((const struct sockaddr *)(src0 + 1))->sa_len != 1974 ((const struct sockaddr *)(dst0+ 1))->sa_len) { 1975 KFREE(newsp); 1976 return key_senderror(so, m, EINVAL); 1977 } 1978 1979 newsp->created = time_uptime; 1980 newsp->lastused = newsp->created; 1981 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1982 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1983 1984 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1985 newsp->state = IPSEC_SPSTATE_ALIVE; 1986 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1987 1988 /* delete the entry in spacqtree */ 1989 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1990 struct secspacq *spacq; 1991 if ((spacq = key_getspacq(&spidx)) != NULL) { 1992 /* reset counter in order to deletion by timehandler. */ 1993 spacq->created = time_uptime; 1994 spacq->count = 0; 1995 } 1996 } 1997 1998 /* Invalidate all cached SPD pointers in the PCBs. */ 1999 ipsec_invalpcbcacheall(); 2000 2001 #if defined(GATEWAY) 2002 /* Invalidate the ipflow cache, as well. */ 2003 ipflow_invalidate_all(0); 2004 #ifdef INET6 2005 if (in6_present) 2006 ip6flow_invalidate_all(0); 2007 #endif /* INET6 */ 2008 #endif /* GATEWAY */ 2009 2010 { 2011 struct mbuf *n, *mpolicy; 2012 struct sadb_msg *newmsg; 2013 int off; 2014 2015 /* create new sadb_msg to reply. */ 2016 if (lft) { 2017 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 2018 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 2019 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2020 } else { 2021 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2022 SADB_X_EXT_POLICY, 2023 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2024 } 2025 if (!n) 2026 return key_senderror(so, m, ENOBUFS); 2027 2028 if (n->m_len < sizeof(*newmsg)) { 2029 n = m_pullup(n, sizeof(*newmsg)); 2030 if (!n) 2031 return key_senderror(so, m, ENOBUFS); 2032 } 2033 newmsg = mtod(n, struct sadb_msg *); 2034 newmsg->sadb_msg_errno = 0; 2035 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2036 2037 off = 0; 2038 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2039 sizeof(*xpl), &off); 2040 if (mpolicy == NULL) { 2041 /* n is already freed */ 2042 return key_senderror(so, m, ENOBUFS); 2043 } 2044 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2045 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2046 m_freem(n); 2047 return key_senderror(so, m, EINVAL); 2048 } 2049 xpl->sadb_x_policy_id = newsp->id; 2050 2051 m_freem(m); 2052 key_update_used(); 2053 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2054 } 2055 } 2056 2057 /* 2058 * get new policy id. 2059 * OUT: 2060 * 0: failure. 2061 * others: success. 2062 */ 2063 static u_int32_t 2064 key_getnewspid(void) 2065 { 2066 u_int32_t newid = 0; 2067 int count = key_spi_trycnt; /* XXX */ 2068 struct secpolicy *sp; 2069 2070 /* when requesting to allocate spi ranged */ 2071 while (count--) { 2072 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2073 2074 if ((sp = key_getspbyid(newid)) == NULL) 2075 break; 2076 2077 KEY_FREESP(&sp); 2078 } 2079 2080 if (count == 0 || newid == 0) { 2081 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2082 return 0; 2083 } 2084 2085 return newid; 2086 } 2087 2088 /* 2089 * SADB_SPDDELETE processing 2090 * receive 2091 * <base, address(SD), policy(*)> 2092 * from the user(?), and set SADB_SASTATE_DEAD, 2093 * and send, 2094 * <base, address(SD), policy(*)> 2095 * to the ikmpd. 2096 * policy(*) including direction of policy. 2097 * 2098 * m will always be freed. 2099 */ 2100 static int 2101 key_spddelete(struct socket *so, struct mbuf *m, 2102 const struct sadb_msghdr *mhp) 2103 { 2104 struct sadb_address *src0, *dst0; 2105 struct sadb_x_policy *xpl0; 2106 struct secpolicyindex spidx; 2107 struct secpolicy *sp; 2108 2109 KASSERT(so != NULL); 2110 KASSERT(m != NULL); 2111 KASSERT(mhp != NULL); 2112 KASSERT(mhp->msg != NULL); 2113 2114 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2115 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2116 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2117 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2118 return key_senderror(so, m, EINVAL); 2119 } 2120 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2121 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2122 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2123 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2124 return key_senderror(so, m, EINVAL); 2125 } 2126 2127 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2128 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2129 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2130 2131 /* make secindex */ 2132 /* XXX boundary check against sa_len */ 2133 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2134 src0 + 1, 2135 dst0 + 1, 2136 src0->sadb_address_prefixlen, 2137 dst0->sadb_address_prefixlen, 2138 src0->sadb_address_proto, 2139 &spidx); 2140 2141 /* checking the direciton. */ 2142 switch (xpl0->sadb_x_policy_dir) { 2143 case IPSEC_DIR_INBOUND: 2144 case IPSEC_DIR_OUTBOUND: 2145 break; 2146 default: 2147 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2148 return key_senderror(so, m, EINVAL); 2149 } 2150 2151 /* Is there SP in SPD ? */ 2152 if ((sp = key_getsp(&spidx)) == NULL) { 2153 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2154 return key_senderror(so, m, EINVAL); 2155 } 2156 2157 /* save policy id to buffer to be returned. */ 2158 xpl0->sadb_x_policy_id = sp->id; 2159 2160 key_sp_dead(sp); 2161 key_sp_unlink(sp); /* XXX jrs ordering */ 2162 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2163 2164 /* Invalidate all cached SPD pointers in the PCBs. */ 2165 ipsec_invalpcbcacheall(); 2166 2167 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2168 2169 { 2170 struct mbuf *n; 2171 struct sadb_msg *newmsg; 2172 2173 /* create new sadb_msg to reply. */ 2174 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2175 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2176 if (!n) 2177 return key_senderror(so, m, ENOBUFS); 2178 2179 newmsg = mtod(n, struct sadb_msg *); 2180 newmsg->sadb_msg_errno = 0; 2181 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2182 2183 m_freem(m); 2184 key_update_used(); 2185 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2186 } 2187 } 2188 2189 /* 2190 * SADB_SPDDELETE2 processing 2191 * receive 2192 * <base, policy(*)> 2193 * from the user(?), and set SADB_SASTATE_DEAD, 2194 * and send, 2195 * <base, policy(*)> 2196 * to the ikmpd. 2197 * policy(*) including direction of policy. 2198 * 2199 * m will always be freed. 2200 */ 2201 static int 2202 key_spddelete2(struct socket *so, struct mbuf *m, 2203 const struct sadb_msghdr *mhp) 2204 { 2205 u_int32_t id; 2206 struct secpolicy *sp; 2207 2208 KASSERT(so != NULL); 2209 KASSERT(m != NULL); 2210 KASSERT(mhp != NULL); 2211 KASSERT(mhp->msg != NULL); 2212 2213 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2214 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2215 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2216 key_senderror(so, m, EINVAL); 2217 return 0; 2218 } 2219 2220 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2221 2222 /* Is there SP in SPD ? */ 2223 if ((sp = key_getspbyid(id)) == NULL) { 2224 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2225 return key_senderror(so, m, EINVAL); 2226 } 2227 2228 key_sp_dead(sp); 2229 key_sp_unlink(sp); /* XXX jrs ordering */ 2230 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2231 sp = NULL; 2232 2233 /* Invalidate all cached SPD pointers in the PCBs. */ 2234 ipsec_invalpcbcacheall(); 2235 2236 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2237 2238 { 2239 struct mbuf *n, *nn; 2240 struct sadb_msg *newmsg; 2241 int off, len; 2242 2243 /* create new sadb_msg to reply. */ 2244 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2245 2246 if (len > MCLBYTES) 2247 return key_senderror(so, m, ENOBUFS); 2248 MGETHDR(n, M_DONTWAIT, MT_DATA); 2249 if (n && len > MHLEN) { 2250 MCLGET(n, M_DONTWAIT); 2251 if ((n->m_flags & M_EXT) == 0) { 2252 m_freem(n); 2253 n = NULL; 2254 } 2255 } 2256 if (!n) 2257 return key_senderror(so, m, ENOBUFS); 2258 2259 n->m_len = len; 2260 n->m_next = NULL; 2261 off = 0; 2262 2263 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2264 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2265 2266 KASSERTMSG(off == len, "length inconsistency"); 2267 2268 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2269 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2270 if (!n->m_next) { 2271 m_freem(n); 2272 return key_senderror(so, m, ENOBUFS); 2273 } 2274 2275 n->m_pkthdr.len = 0; 2276 for (nn = n; nn; nn = nn->m_next) 2277 n->m_pkthdr.len += nn->m_len; 2278 2279 newmsg = mtod(n, struct sadb_msg *); 2280 newmsg->sadb_msg_errno = 0; 2281 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2282 2283 m_freem(m); 2284 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2285 } 2286 } 2287 2288 /* 2289 * SADB_X_GET processing 2290 * receive 2291 * <base, policy(*)> 2292 * from the user(?), 2293 * and send, 2294 * <base, address(SD), policy> 2295 * to the ikmpd. 2296 * policy(*) including direction of policy. 2297 * 2298 * m will always be freed. 2299 */ 2300 static int 2301 key_spdget(struct socket *so, struct mbuf *m, 2302 const struct sadb_msghdr *mhp) 2303 { 2304 u_int32_t id; 2305 struct secpolicy *sp; 2306 struct mbuf *n; 2307 2308 KASSERT(so != NULL); 2309 KASSERT(m != NULL); 2310 KASSERT(mhp != NULL); 2311 KASSERT(mhp->msg != NULL); 2312 2313 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2314 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2315 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2316 return key_senderror(so, m, EINVAL); 2317 } 2318 2319 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2320 2321 /* Is there SP in SPD ? */ 2322 if ((sp = key_getspbyid(id)) == NULL) { 2323 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2324 return key_senderror(so, m, ENOENT); 2325 } 2326 2327 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2328 mhp->msg->sadb_msg_pid); 2329 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2330 if (n != NULL) { 2331 m_freem(m); 2332 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2333 } else 2334 return key_senderror(so, m, ENOBUFS); 2335 } 2336 2337 /* 2338 * SADB_X_SPDACQUIRE processing. 2339 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2340 * send 2341 * <base, policy(*)> 2342 * to KMD, and expect to receive 2343 * <base> with SADB_X_SPDACQUIRE if error occurred, 2344 * or 2345 * <base, policy> 2346 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2347 * policy(*) is without policy requests. 2348 * 2349 * 0 : succeed 2350 * others: error number 2351 */ 2352 int 2353 key_spdacquire(const struct secpolicy *sp) 2354 { 2355 struct mbuf *result = NULL, *m; 2356 struct secspacq *newspacq; 2357 int error; 2358 2359 KASSERT(sp != NULL); 2360 KASSERTMSG(sp->req == NULL, "called but there is request"); 2361 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2362 "policy mismathed. IPsec is expected"); 2363 2364 /* Get an entry to check whether sent message or not. */ 2365 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2366 if (key_blockacq_count < newspacq->count) { 2367 /* reset counter and do send message. */ 2368 newspacq->count = 0; 2369 } else { 2370 /* increment counter and do nothing. */ 2371 newspacq->count++; 2372 return 0; 2373 } 2374 } else { 2375 /* make new entry for blocking to send SADB_ACQUIRE. */ 2376 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2377 return ENOBUFS; 2378 2379 /* add to acqtree */ 2380 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2381 } 2382 2383 /* create new sadb_msg to reply. */ 2384 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2385 if (!m) { 2386 error = ENOBUFS; 2387 goto fail; 2388 } 2389 result = m; 2390 2391 result->m_pkthdr.len = 0; 2392 for (m = result; m; m = m->m_next) 2393 result->m_pkthdr.len += m->m_len; 2394 2395 mtod(result, struct sadb_msg *)->sadb_msg_len = 2396 PFKEY_UNIT64(result->m_pkthdr.len); 2397 2398 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2399 2400 fail: 2401 if (result) 2402 m_freem(result); 2403 return error; 2404 } 2405 2406 /* 2407 * SADB_SPDFLUSH processing 2408 * receive 2409 * <base> 2410 * from the user, and free all entries in secpctree. 2411 * and send, 2412 * <base> 2413 * to the user. 2414 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2415 * 2416 * m will always be freed. 2417 */ 2418 static int 2419 key_spdflush(struct socket *so, struct mbuf *m, 2420 const struct sadb_msghdr *mhp) 2421 { 2422 struct sadb_msg *newmsg; 2423 struct secpolicy *sp; 2424 u_int dir; 2425 2426 KASSERT(so != NULL); 2427 KASSERT(m != NULL); 2428 KASSERT(mhp != NULL); 2429 KASSERT(mhp->msg != NULL); 2430 2431 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2432 return key_senderror(so, m, EINVAL); 2433 2434 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2435 struct secpolicy * nextsp; 2436 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 2437 if (sp->state == IPSEC_SPSTATE_DEAD) 2438 continue; 2439 key_sp_dead(sp); 2440 key_sp_unlink(sp); 2441 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2442 continue; 2443 } 2444 } 2445 2446 /* Invalidate all cached SPD pointers in the PCBs. */ 2447 ipsec_invalpcbcacheall(); 2448 2449 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2450 2451 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2452 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2453 return key_senderror(so, m, ENOBUFS); 2454 } 2455 2456 if (m->m_next) 2457 m_freem(m->m_next); 2458 m->m_next = NULL; 2459 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2460 newmsg = mtod(m, struct sadb_msg *); 2461 newmsg->sadb_msg_errno = 0; 2462 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2463 2464 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2465 } 2466 2467 static struct sockaddr key_src = { 2468 .sa_len = 2, 2469 .sa_family = PF_KEY, 2470 }; 2471 2472 static struct mbuf * 2473 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2474 { 2475 struct secpolicy *sp; 2476 int cnt; 2477 u_int dir; 2478 struct mbuf *m, *n, *prev; 2479 int totlen; 2480 2481 *lenp = 0; 2482 2483 /* search SPD entry and get buffer size. */ 2484 cnt = 0; 2485 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2486 LIST_FOREACH(sp, &sptree[dir], chain) { 2487 cnt++; 2488 } 2489 } 2490 2491 if (cnt == 0) { 2492 *errorp = ENOENT; 2493 return (NULL); 2494 } 2495 2496 m = NULL; 2497 prev = m; 2498 totlen = 0; 2499 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2500 LIST_FOREACH(sp, &sptree[dir], chain) { 2501 --cnt; 2502 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2503 2504 if (!n) { 2505 *errorp = ENOBUFS; 2506 if (m) m_freem(m); 2507 return (NULL); 2508 } 2509 2510 totlen += n->m_pkthdr.len; 2511 if (!m) { 2512 m = n; 2513 } else { 2514 prev->m_nextpkt = n; 2515 } 2516 prev = n; 2517 } 2518 } 2519 2520 *lenp = totlen; 2521 *errorp = 0; 2522 return (m); 2523 } 2524 2525 /* 2526 * SADB_SPDDUMP processing 2527 * receive 2528 * <base> 2529 * from the user, and dump all SP leaves 2530 * and send, 2531 * <base> ..... 2532 * to the ikmpd. 2533 * 2534 * m will always be freed. 2535 */ 2536 static int 2537 key_spddump(struct socket *so, struct mbuf *m0, 2538 const struct sadb_msghdr *mhp) 2539 { 2540 struct mbuf *n; 2541 int error, len; 2542 int ok, s; 2543 pid_t pid; 2544 2545 KASSERT(so != NULL); 2546 KASSERT(m0 != NULL); 2547 KASSERT(mhp != NULL); 2548 KASSERT(mhp->msg != NULL); 2549 2550 pid = mhp->msg->sadb_msg_pid; 2551 /* 2552 * If the requestor has insufficient socket-buffer space 2553 * for the entire chain, nobody gets any response to the DUMP. 2554 * XXX For now, only the requestor ever gets anything. 2555 * Moreover, if the requestor has any space at all, they receive 2556 * the entire chain, otherwise the request is refused with ENOBUFS. 2557 */ 2558 if (sbspace(&so->so_rcv) <= 0) { 2559 return key_senderror(so, m0, ENOBUFS); 2560 } 2561 2562 s = splsoftnet(); 2563 n = key_setspddump_chain(&error, &len, pid); 2564 splx(s); 2565 2566 if (n == NULL) { 2567 return key_senderror(so, m0, ENOENT); 2568 } 2569 { 2570 uint64_t *ps = PFKEY_STAT_GETREF(); 2571 ps[PFKEY_STAT_IN_TOTAL]++; 2572 ps[PFKEY_STAT_IN_BYTES] += len; 2573 PFKEY_STAT_PUTREF(); 2574 } 2575 2576 /* 2577 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2578 * The requestor receives either the entire chain, or an 2579 * error message with ENOBUFS. 2580 */ 2581 2582 /* 2583 * sbappendchainwith record takes the chain of entries, one 2584 * packet-record per SPD entry, prepends the key_src sockaddr 2585 * to each packet-record, links the sockaddr mbufs into a new 2586 * list of records, then appends the entire resulting 2587 * list to the requesting socket. 2588 */ 2589 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2590 n, SB_PRIO_ONESHOT_OVERFLOW); 2591 2592 if (!ok) { 2593 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2594 m_freem(n); 2595 return key_senderror(so, m0, ENOBUFS); 2596 } 2597 2598 m_freem(m0); 2599 return error; 2600 } 2601 2602 /* 2603 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2604 */ 2605 static int 2606 key_nat_map(struct socket *so, struct mbuf *m, 2607 const struct sadb_msghdr *mhp) 2608 { 2609 struct sadb_x_nat_t_type *type; 2610 struct sadb_x_nat_t_port *sport; 2611 struct sadb_x_nat_t_port *dport; 2612 struct sadb_address *iaddr, *raddr; 2613 struct sadb_x_nat_t_frag *frag; 2614 2615 KASSERT(so != NULL); 2616 KASSERT(m != NULL); 2617 KASSERT(mhp != NULL); 2618 KASSERT(mhp->msg != NULL); 2619 2620 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2621 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2622 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2623 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2624 return key_senderror(so, m, EINVAL); 2625 } 2626 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2627 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2628 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2629 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2630 return key_senderror(so, m, EINVAL); 2631 } 2632 2633 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2634 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2635 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2636 return key_senderror(so, m, EINVAL); 2637 } 2638 2639 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2640 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2641 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2642 return key_senderror(so, m, EINVAL); 2643 } 2644 2645 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2646 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2647 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2648 return key_senderror(so, m, EINVAL); 2649 } 2650 2651 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2652 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2653 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2654 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2655 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2656 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2657 2658 /* 2659 * XXX handle that, it should also contain a SA, or anything 2660 * that enable to update the SA information. 2661 */ 2662 2663 return 0; 2664 } 2665 2666 static struct mbuf * 2667 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2668 { 2669 struct mbuf *result = NULL, *m; 2670 2671 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2672 if (!m) 2673 goto fail; 2674 result = m; 2675 2676 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2677 &sp->spidx.src.sa, sp->spidx.prefs, 2678 sp->spidx.ul_proto); 2679 if (!m) 2680 goto fail; 2681 m_cat(result, m); 2682 2683 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2684 &sp->spidx.dst.sa, sp->spidx.prefd, 2685 sp->spidx.ul_proto); 2686 if (!m) 2687 goto fail; 2688 m_cat(result, m); 2689 2690 m = key_sp2msg(sp); 2691 if (!m) 2692 goto fail; 2693 m_cat(result, m); 2694 2695 if ((result->m_flags & M_PKTHDR) == 0) 2696 goto fail; 2697 2698 if (result->m_len < sizeof(struct sadb_msg)) { 2699 result = m_pullup(result, sizeof(struct sadb_msg)); 2700 if (result == NULL) 2701 goto fail; 2702 } 2703 2704 result->m_pkthdr.len = 0; 2705 for (m = result; m; m = m->m_next) 2706 result->m_pkthdr.len += m->m_len; 2707 2708 mtod(result, struct sadb_msg *)->sadb_msg_len = 2709 PFKEY_UNIT64(result->m_pkthdr.len); 2710 2711 return result; 2712 2713 fail: 2714 m_freem(result); 2715 return NULL; 2716 } 2717 2718 /* 2719 * get PFKEY message length for security policy and request. 2720 */ 2721 static u_int 2722 key_getspreqmsglen(const struct secpolicy *sp) 2723 { 2724 u_int tlen; 2725 2726 tlen = sizeof(struct sadb_x_policy); 2727 2728 /* if is the policy for ipsec ? */ 2729 if (sp->policy != IPSEC_POLICY_IPSEC) 2730 return tlen; 2731 2732 /* get length of ipsec requests */ 2733 { 2734 const struct ipsecrequest *isr; 2735 int len; 2736 2737 for (isr = sp->req; isr != NULL; isr = isr->next) { 2738 len = sizeof(struct sadb_x_ipsecrequest) 2739 + isr->saidx.src.sa.sa_len 2740 + isr->saidx.dst.sa.sa_len; 2741 2742 tlen += PFKEY_ALIGN8(len); 2743 } 2744 } 2745 2746 return tlen; 2747 } 2748 2749 /* 2750 * SADB_SPDEXPIRE processing 2751 * send 2752 * <base, address(SD), lifetime(CH), policy> 2753 * to KMD by PF_KEY. 2754 * 2755 * OUT: 0 : succeed 2756 * others : error number 2757 */ 2758 static int 2759 key_spdexpire(struct secpolicy *sp) 2760 { 2761 int s; 2762 struct mbuf *result = NULL, *m; 2763 int len; 2764 int error = -1; 2765 struct sadb_lifetime *lt; 2766 2767 /* XXX: Why do we lock ? */ 2768 s = splsoftnet(); /*called from softclock()*/ 2769 2770 KASSERT(sp != NULL); 2771 2772 /* set msg header */ 2773 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2774 if (!m) { 2775 error = ENOBUFS; 2776 goto fail; 2777 } 2778 result = m; 2779 2780 /* create lifetime extension (current and hard) */ 2781 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2782 m = key_alloc_mbuf(len); 2783 if (!m || m->m_next) { /*XXX*/ 2784 if (m) 2785 m_freem(m); 2786 error = ENOBUFS; 2787 goto fail; 2788 } 2789 memset(mtod(m, void *), 0, len); 2790 lt = mtod(m, struct sadb_lifetime *); 2791 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2792 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2793 lt->sadb_lifetime_allocations = 0; 2794 lt->sadb_lifetime_bytes = 0; 2795 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2796 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2797 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2798 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2799 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2800 lt->sadb_lifetime_allocations = 0; 2801 lt->sadb_lifetime_bytes = 0; 2802 lt->sadb_lifetime_addtime = sp->lifetime; 2803 lt->sadb_lifetime_usetime = sp->validtime; 2804 m_cat(result, m); 2805 2806 /* set sadb_address for source */ 2807 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2808 &sp->spidx.src.sa, 2809 sp->spidx.prefs, sp->spidx.ul_proto); 2810 if (!m) { 2811 error = ENOBUFS; 2812 goto fail; 2813 } 2814 m_cat(result, m); 2815 2816 /* set sadb_address for destination */ 2817 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2818 &sp->spidx.dst.sa, 2819 sp->spidx.prefd, sp->spidx.ul_proto); 2820 if (!m) { 2821 error = ENOBUFS; 2822 goto fail; 2823 } 2824 m_cat(result, m); 2825 2826 /* set secpolicy */ 2827 m = key_sp2msg(sp); 2828 if (!m) { 2829 error = ENOBUFS; 2830 goto fail; 2831 } 2832 m_cat(result, m); 2833 2834 if ((result->m_flags & M_PKTHDR) == 0) { 2835 error = EINVAL; 2836 goto fail; 2837 } 2838 2839 if (result->m_len < sizeof(struct sadb_msg)) { 2840 result = m_pullup(result, sizeof(struct sadb_msg)); 2841 if (result == NULL) { 2842 error = ENOBUFS; 2843 goto fail; 2844 } 2845 } 2846 2847 result->m_pkthdr.len = 0; 2848 for (m = result; m; m = m->m_next) 2849 result->m_pkthdr.len += m->m_len; 2850 2851 mtod(result, struct sadb_msg *)->sadb_msg_len = 2852 PFKEY_UNIT64(result->m_pkthdr.len); 2853 2854 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2855 2856 fail: 2857 if (result) 2858 m_freem(result); 2859 splx(s); 2860 return error; 2861 } 2862 2863 /* %%% SAD management */ 2864 /* 2865 * allocating a memory for new SA head, and copy from the values of mhp. 2866 * OUT: NULL : failure due to the lack of memory. 2867 * others : pointer to new SA head. 2868 */ 2869 static struct secashead * 2870 key_newsah(const struct secasindex *saidx) 2871 { 2872 struct secashead *newsah; 2873 2874 KASSERT(saidx != NULL); 2875 2876 newsah = (struct secashead *) 2877 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2878 if (newsah != NULL) { 2879 int i; 2880 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2881 LIST_INIT(&newsah->savtree[i]); 2882 newsah->saidx = *saidx; 2883 2884 /* add to saidxtree */ 2885 newsah->state = SADB_SASTATE_MATURE; 2886 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2887 } 2888 return(newsah); 2889 } 2890 2891 /* 2892 * delete SA index and all SA registerd. 2893 */ 2894 static void 2895 key_delsah(struct secashead *sah) 2896 { 2897 struct secasvar *sav, *nextsav; 2898 u_int state; 2899 int s; 2900 int zombie = 0; 2901 2902 KASSERT(sah != NULL); 2903 2904 s = splsoftnet(); /*called from softclock()*/ 2905 2906 /* searching all SA registerd in the secindex. */ 2907 SASTATE_ANY_FOREACH(state) { 2908 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2909 if (sav->refcnt == 0) { 2910 /* sanity check */ 2911 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2912 KEY_FREESAV(&sav); 2913 } else { 2914 /* give up to delete this sa */ 2915 zombie++; 2916 } 2917 } 2918 } 2919 2920 /* don't delete sah only if there are savs. */ 2921 if (zombie) { 2922 splx(s); 2923 return; 2924 } 2925 2926 rtcache_free(&sah->sa_route); 2927 2928 /* remove from tree of SA index */ 2929 if (__LIST_CHAINED(sah)) 2930 LIST_REMOVE(sah, chain); 2931 2932 KFREE(sah); 2933 2934 splx(s); 2935 return; 2936 } 2937 2938 /* 2939 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2940 * and copy the values of mhp into new buffer. 2941 * When SAD message type is GETSPI: 2942 * to set sequence number from acq_seq++, 2943 * to set zero to SPI. 2944 * not to call key_setsava(). 2945 * OUT: NULL : fail 2946 * others : pointer to new secasvar. 2947 * 2948 * does not modify mbuf. does not free mbuf on error. 2949 */ 2950 static struct secasvar * 2951 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2952 struct secashead *sah, int *errp, 2953 const char* where, int tag) 2954 { 2955 struct secasvar *newsav; 2956 const struct sadb_sa *xsa; 2957 2958 KASSERT(m != NULL); 2959 KASSERT(mhp != NULL); 2960 KASSERT(mhp->msg != NULL); 2961 KASSERT(sah != NULL); 2962 2963 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2964 if (newsav == NULL) { 2965 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2966 *errp = ENOBUFS; 2967 goto done; 2968 } 2969 memset(newsav, 0, sizeof(struct secasvar)); 2970 2971 switch (mhp->msg->sadb_msg_type) { 2972 case SADB_GETSPI: 2973 newsav->spi = 0; 2974 2975 #ifdef IPSEC_DOSEQCHECK 2976 /* sync sequence number */ 2977 if (mhp->msg->sadb_msg_seq == 0) 2978 newsav->seq = 2979 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2980 else 2981 #endif 2982 newsav->seq = mhp->msg->sadb_msg_seq; 2983 break; 2984 2985 case SADB_ADD: 2986 /* sanity check */ 2987 if (mhp->ext[SADB_EXT_SA] == NULL) { 2988 KFREE(newsav), newsav = NULL; 2989 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2990 *errp = EINVAL; 2991 goto done; 2992 } 2993 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2994 newsav->spi = xsa->sadb_sa_spi; 2995 newsav->seq = mhp->msg->sadb_msg_seq; 2996 break; 2997 default: 2998 KFREE(newsav), newsav = NULL; 2999 *errp = EINVAL; 3000 goto done; 3001 } 3002 3003 /* copy sav values */ 3004 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 3005 *errp = key_setsaval(newsav, m, mhp); 3006 if (*errp) { 3007 KFREE(newsav), newsav = NULL; 3008 goto done; 3009 } 3010 } 3011 3012 /* reset created */ 3013 newsav->created = time_uptime; 3014 newsav->pid = mhp->msg->sadb_msg_pid; 3015 3016 /* add to satree */ 3017 newsav->sah = sah; 3018 newsav->refcnt = 1; 3019 newsav->state = SADB_SASTATE_LARVAL; 3020 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 3021 secasvar, chain); 3022 done: 3023 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3024 "DP from %s:%u return SA:%p\n", where, tag, newsav); 3025 3026 return newsav; 3027 } 3028 3029 /* 3030 * free() SA variable entry. 3031 */ 3032 static void 3033 key_delsav(struct secasvar *sav) 3034 { 3035 3036 KASSERT(sav != NULL); 3037 KASSERTMSG(sav->refcnt == 0, 3038 "reference count %u > 0", sav->refcnt); 3039 3040 /* remove from SA header */ 3041 if (__LIST_CHAINED(sav)) 3042 LIST_REMOVE(sav, chain); 3043 3044 /* 3045 * Cleanup xform state. Note that zeroize'ing causes the 3046 * keys to be cleared; otherwise we must do it ourself. 3047 */ 3048 if (sav->tdb_xform != NULL) { 3049 sav->tdb_xform->xf_zeroize(sav); 3050 sav->tdb_xform = NULL; 3051 } else { 3052 if (sav->key_auth != NULL) 3053 explicit_memset(_KEYBUF(sav->key_auth), 0, 3054 _KEYLEN(sav->key_auth)); 3055 if (sav->key_enc != NULL) 3056 explicit_memset(_KEYBUF(sav->key_enc), 0, 3057 _KEYLEN(sav->key_enc)); 3058 } 3059 if (sav->key_auth != NULL) { 3060 KFREE(sav->key_auth); 3061 sav->key_auth = NULL; 3062 } 3063 if (sav->key_enc != NULL) { 3064 KFREE(sav->key_enc); 3065 sav->key_enc = NULL; 3066 } 3067 if (sav->replay != NULL) { 3068 KFREE(sav->replay); 3069 sav->replay = NULL; 3070 } 3071 if (sav->lft_c != NULL) { 3072 KFREE(sav->lft_c); 3073 sav->lft_c = NULL; 3074 } 3075 if (sav->lft_h != NULL) { 3076 KFREE(sav->lft_h); 3077 sav->lft_h = NULL; 3078 } 3079 if (sav->lft_s != NULL) { 3080 KFREE(sav->lft_s); 3081 sav->lft_s = NULL; 3082 } 3083 3084 KFREE(sav); 3085 3086 return; 3087 } 3088 3089 /* 3090 * search SAD. 3091 * OUT: 3092 * NULL : not found 3093 * others : found, pointer to a SA. 3094 */ 3095 static struct secashead * 3096 key_getsah(const struct secasindex *saidx) 3097 { 3098 struct secashead *sah; 3099 3100 LIST_FOREACH(sah, &sahtree, chain) { 3101 if (sah->state == SADB_SASTATE_DEAD) 3102 continue; 3103 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3104 return sah; 3105 } 3106 3107 return NULL; 3108 } 3109 3110 /* 3111 * check not to be duplicated SPI. 3112 * NOTE: this function is too slow due to searching all SAD. 3113 * OUT: 3114 * NULL : not found 3115 * others : found, pointer to a SA. 3116 */ 3117 static struct secasvar * 3118 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3119 { 3120 struct secashead *sah; 3121 struct secasvar *sav; 3122 3123 /* check address family */ 3124 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3125 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3126 return NULL; 3127 } 3128 3129 /* check all SAD */ 3130 LIST_FOREACH(sah, &sahtree, chain) { 3131 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3132 continue; 3133 sav = key_getsavbyspi(sah, spi); 3134 if (sav != NULL) 3135 return sav; 3136 } 3137 3138 return NULL; 3139 } 3140 3141 /* 3142 * search SAD litmited alive SA, protocol, SPI. 3143 * OUT: 3144 * NULL : not found 3145 * others : found, pointer to a SA. 3146 */ 3147 static struct secasvar * 3148 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3149 { 3150 struct secasvar *sav; 3151 u_int state; 3152 3153 /* search all status */ 3154 SASTATE_ALIVE_FOREACH(state) { 3155 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3156 3157 /* sanity check */ 3158 if (sav->state != state) { 3159 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3160 "invalid sav->state (queue: %d SA: %d)\n", 3161 state, sav->state)); 3162 continue; 3163 } 3164 3165 if (sav->spi == spi) 3166 return sav; 3167 } 3168 } 3169 3170 return NULL; 3171 } 3172 3173 /* 3174 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3175 * You must update these if need. 3176 * OUT: 0: success. 3177 * !0: failure. 3178 * 3179 * does not modify mbuf. does not free mbuf on error. 3180 */ 3181 static int 3182 key_setsaval(struct secasvar *sav, struct mbuf *m, 3183 const struct sadb_msghdr *mhp) 3184 { 3185 int error = 0; 3186 3187 KASSERT(m != NULL); 3188 KASSERT(mhp != NULL); 3189 KASSERT(mhp->msg != NULL); 3190 3191 /* initialization */ 3192 sav->replay = NULL; 3193 sav->key_auth = NULL; 3194 sav->key_enc = NULL; 3195 sav->lft_c = NULL; 3196 sav->lft_h = NULL; 3197 sav->lft_s = NULL; 3198 sav->tdb_xform = NULL; /* transform */ 3199 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3200 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3201 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3202 sav->natt_type = 0; 3203 sav->esp_frag = 0; 3204 3205 /* SA */ 3206 if (mhp->ext[SADB_EXT_SA] != NULL) { 3207 const struct sadb_sa *sa0; 3208 3209 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3210 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3211 error = EINVAL; 3212 goto fail; 3213 } 3214 3215 sav->alg_auth = sa0->sadb_sa_auth; 3216 sav->alg_enc = sa0->sadb_sa_encrypt; 3217 sav->flags = sa0->sadb_sa_flags; 3218 3219 /* replay window */ 3220 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3221 sav->replay = (struct secreplay *) 3222 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3223 if (sav->replay == NULL) { 3224 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3225 error = ENOBUFS; 3226 goto fail; 3227 } 3228 if (sa0->sadb_sa_replay != 0) 3229 sav->replay->bitmap = (char*)(sav->replay+1); 3230 sav->replay->wsize = sa0->sadb_sa_replay; 3231 } 3232 } 3233 3234 /* Authentication keys */ 3235 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3236 const struct sadb_key *key0; 3237 int len; 3238 3239 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3240 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3241 3242 error = 0; 3243 if (len < sizeof(*key0)) { 3244 error = EINVAL; 3245 goto fail; 3246 } 3247 switch (mhp->msg->sadb_msg_satype) { 3248 case SADB_SATYPE_AH: 3249 case SADB_SATYPE_ESP: 3250 case SADB_X_SATYPE_TCPSIGNATURE: 3251 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3252 sav->alg_auth != SADB_X_AALG_NULL) 3253 error = EINVAL; 3254 break; 3255 case SADB_X_SATYPE_IPCOMP: 3256 default: 3257 error = EINVAL; 3258 break; 3259 } 3260 if (error) { 3261 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3262 goto fail; 3263 } 3264 3265 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3266 if (sav->key_auth == NULL) { 3267 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3268 error = ENOBUFS; 3269 goto fail; 3270 } 3271 } 3272 3273 /* Encryption key */ 3274 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3275 const struct sadb_key *key0; 3276 int len; 3277 3278 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3279 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3280 3281 error = 0; 3282 if (len < sizeof(*key0)) { 3283 error = EINVAL; 3284 goto fail; 3285 } 3286 switch (mhp->msg->sadb_msg_satype) { 3287 case SADB_SATYPE_ESP: 3288 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3289 sav->alg_enc != SADB_EALG_NULL) { 3290 error = EINVAL; 3291 break; 3292 } 3293 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3294 if (sav->key_enc == NULL) { 3295 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3296 error = ENOBUFS; 3297 goto fail; 3298 } 3299 break; 3300 case SADB_X_SATYPE_IPCOMP: 3301 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3302 error = EINVAL; 3303 sav->key_enc = NULL; /*just in case*/ 3304 break; 3305 case SADB_SATYPE_AH: 3306 case SADB_X_SATYPE_TCPSIGNATURE: 3307 default: 3308 error = EINVAL; 3309 break; 3310 } 3311 if (error) { 3312 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3313 goto fail; 3314 } 3315 } 3316 3317 /* set iv */ 3318 sav->ivlen = 0; 3319 3320 switch (mhp->msg->sadb_msg_satype) { 3321 case SADB_SATYPE_AH: 3322 error = xform_init(sav, XF_AH); 3323 break; 3324 case SADB_SATYPE_ESP: 3325 error = xform_init(sav, XF_ESP); 3326 break; 3327 case SADB_X_SATYPE_IPCOMP: 3328 error = xform_init(sav, XF_IPCOMP); 3329 break; 3330 case SADB_X_SATYPE_TCPSIGNATURE: 3331 error = xform_init(sav, XF_TCPSIGNATURE); 3332 break; 3333 } 3334 if (error) { 3335 ipseclog((LOG_DEBUG, 3336 "key_setsaval: unable to initialize SA type %u.\n", 3337 mhp->msg->sadb_msg_satype)); 3338 goto fail; 3339 } 3340 3341 /* reset created */ 3342 sav->created = time_uptime; 3343 3344 /* make lifetime for CURRENT */ 3345 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3346 sizeof(struct sadb_lifetime)); 3347 if (sav->lft_c == NULL) { 3348 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3349 error = ENOBUFS; 3350 goto fail; 3351 } 3352 3353 sav->lft_c->sadb_lifetime_len = 3354 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3355 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3356 sav->lft_c->sadb_lifetime_allocations = 0; 3357 sav->lft_c->sadb_lifetime_bytes = 0; 3358 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3359 sav->lft_c->sadb_lifetime_usetime = 0; 3360 3361 /* lifetimes for HARD and SOFT */ 3362 { 3363 const struct sadb_lifetime *lft0; 3364 3365 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3366 if (lft0 != NULL) { 3367 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3368 error = EINVAL; 3369 goto fail; 3370 } 3371 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3372 sizeof(*lft0)); 3373 if (sav->lft_h == NULL) { 3374 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3375 error = ENOBUFS; 3376 goto fail; 3377 } 3378 /* to be initialize ? */ 3379 } 3380 3381 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3382 if (lft0 != NULL) { 3383 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3384 error = EINVAL; 3385 goto fail; 3386 } 3387 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3388 sizeof(*lft0)); 3389 if (sav->lft_s == NULL) { 3390 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3391 error = ENOBUFS; 3392 goto fail; 3393 } 3394 /* to be initialize ? */ 3395 } 3396 } 3397 3398 return 0; 3399 3400 fail: 3401 /* initialization */ 3402 if (sav->replay != NULL) { 3403 KFREE(sav->replay); 3404 sav->replay = NULL; 3405 } 3406 if (sav->key_auth != NULL) { 3407 KFREE(sav->key_auth); 3408 sav->key_auth = NULL; 3409 } 3410 if (sav->key_enc != NULL) { 3411 KFREE(sav->key_enc); 3412 sav->key_enc = NULL; 3413 } 3414 if (sav->lft_c != NULL) { 3415 KFREE(sav->lft_c); 3416 sav->lft_c = NULL; 3417 } 3418 if (sav->lft_h != NULL) { 3419 KFREE(sav->lft_h); 3420 sav->lft_h = NULL; 3421 } 3422 if (sav->lft_s != NULL) { 3423 KFREE(sav->lft_s); 3424 sav->lft_s = NULL; 3425 } 3426 3427 return error; 3428 } 3429 3430 /* 3431 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3432 * OUT: 0: valid 3433 * other: errno 3434 */ 3435 static int 3436 key_mature(struct secasvar *sav) 3437 { 3438 int error; 3439 3440 /* check SPI value */ 3441 switch (sav->sah->saidx.proto) { 3442 case IPPROTO_ESP: 3443 case IPPROTO_AH: 3444 if (ntohl(sav->spi) <= 255) { 3445 ipseclog((LOG_DEBUG, 3446 "key_mature: illegal range of SPI %u.\n", 3447 (u_int32_t)ntohl(sav->spi))); 3448 return EINVAL; 3449 } 3450 break; 3451 } 3452 3453 /* check satype */ 3454 switch (sav->sah->saidx.proto) { 3455 case IPPROTO_ESP: 3456 /* check flags */ 3457 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3458 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3459 ipseclog((LOG_DEBUG, "key_mature: " 3460 "invalid flag (derived) given to old-esp.\n")); 3461 return EINVAL; 3462 } 3463 error = xform_init(sav, XF_ESP); 3464 break; 3465 case IPPROTO_AH: 3466 /* check flags */ 3467 if (sav->flags & SADB_X_EXT_DERIV) { 3468 ipseclog((LOG_DEBUG, "key_mature: " 3469 "invalid flag (derived) given to AH SA.\n")); 3470 return EINVAL; 3471 } 3472 if (sav->alg_enc != SADB_EALG_NONE) { 3473 ipseclog((LOG_DEBUG, "key_mature: " 3474 "protocol and algorithm mismated.\n")); 3475 return(EINVAL); 3476 } 3477 error = xform_init(sav, XF_AH); 3478 break; 3479 case IPPROTO_IPCOMP: 3480 if (sav->alg_auth != SADB_AALG_NONE) { 3481 ipseclog((LOG_DEBUG, "key_mature: " 3482 "protocol and algorithm mismated.\n")); 3483 return(EINVAL); 3484 } 3485 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3486 && ntohl(sav->spi) >= 0x10000) { 3487 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3488 return(EINVAL); 3489 } 3490 error = xform_init(sav, XF_IPCOMP); 3491 break; 3492 case IPPROTO_TCP: 3493 if (sav->alg_enc != SADB_EALG_NONE) { 3494 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3495 "mismated.\n", __func__)); 3496 return(EINVAL); 3497 } 3498 error = xform_init(sav, XF_TCPSIGNATURE); 3499 break; 3500 default: 3501 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3502 error = EPROTONOSUPPORT; 3503 break; 3504 } 3505 if (error == 0) 3506 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3507 return (error); 3508 } 3509 3510 /* 3511 * subroutine for SADB_GET and SADB_DUMP. 3512 */ 3513 static struct mbuf * 3514 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3515 u_int32_t seq, u_int32_t pid) 3516 { 3517 struct mbuf *result = NULL, *tres = NULL, *m; 3518 int l = 0; 3519 int i; 3520 void *p; 3521 struct sadb_lifetime lt; 3522 int dumporder[] = { 3523 SADB_EXT_SA, SADB_X_EXT_SA2, 3524 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3525 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3526 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3527 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3528 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3529 SADB_X_EXT_NAT_T_TYPE, 3530 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3531 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3532 SADB_X_EXT_NAT_T_FRAG, 3533 3534 }; 3535 3536 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3537 if (m == NULL) 3538 goto fail; 3539 result = m; 3540 3541 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3542 m = NULL; 3543 p = NULL; 3544 switch (dumporder[i]) { 3545 case SADB_EXT_SA: 3546 m = key_setsadbsa(sav); 3547 break; 3548 3549 case SADB_X_EXT_SA2: 3550 m = key_setsadbxsa2(sav->sah->saidx.mode, 3551 sav->replay ? sav->replay->count : 0, 3552 sav->sah->saidx.reqid); 3553 break; 3554 3555 case SADB_EXT_ADDRESS_SRC: 3556 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3557 &sav->sah->saidx.src.sa, 3558 FULLMASK, IPSEC_ULPROTO_ANY); 3559 break; 3560 3561 case SADB_EXT_ADDRESS_DST: 3562 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3563 &sav->sah->saidx.dst.sa, 3564 FULLMASK, IPSEC_ULPROTO_ANY); 3565 break; 3566 3567 case SADB_EXT_KEY_AUTH: 3568 if (!sav->key_auth) 3569 continue; 3570 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3571 p = sav->key_auth; 3572 break; 3573 3574 case SADB_EXT_KEY_ENCRYPT: 3575 if (!sav->key_enc) 3576 continue; 3577 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3578 p = sav->key_enc; 3579 break; 3580 3581 case SADB_EXT_LIFETIME_CURRENT: 3582 if (!sav->lft_c) 3583 continue; 3584 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3585 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3586 lt.sadb_lifetime_addtime += time_second - time_uptime; 3587 lt.sadb_lifetime_usetime += time_second - time_uptime; 3588 p = < 3589 break; 3590 3591 case SADB_EXT_LIFETIME_HARD: 3592 if (!sav->lft_h) 3593 continue; 3594 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3595 p = sav->lft_h; 3596 break; 3597 3598 case SADB_EXT_LIFETIME_SOFT: 3599 if (!sav->lft_s) 3600 continue; 3601 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3602 p = sav->lft_s; 3603 break; 3604 3605 case SADB_X_EXT_NAT_T_TYPE: 3606 m = key_setsadbxtype(sav->natt_type); 3607 break; 3608 3609 case SADB_X_EXT_NAT_T_DPORT: 3610 if (sav->natt_type == 0) 3611 continue; 3612 m = key_setsadbxport( 3613 key_portfromsaddr(&sav->sah->saidx.dst), 3614 SADB_X_EXT_NAT_T_DPORT); 3615 break; 3616 3617 case SADB_X_EXT_NAT_T_SPORT: 3618 if (sav->natt_type == 0) 3619 continue; 3620 m = key_setsadbxport( 3621 key_portfromsaddr(&sav->sah->saidx.src), 3622 SADB_X_EXT_NAT_T_SPORT); 3623 break; 3624 3625 case SADB_X_EXT_NAT_T_FRAG: 3626 /* don't send frag info if not set */ 3627 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3628 continue; 3629 m = key_setsadbxfrag(sav->esp_frag); 3630 break; 3631 3632 case SADB_X_EXT_NAT_T_OAI: 3633 case SADB_X_EXT_NAT_T_OAR: 3634 continue; 3635 3636 case SADB_EXT_ADDRESS_PROXY: 3637 case SADB_EXT_IDENTITY_SRC: 3638 case SADB_EXT_IDENTITY_DST: 3639 /* XXX: should we brought from SPD ? */ 3640 case SADB_EXT_SENSITIVITY: 3641 default: 3642 continue; 3643 } 3644 3645 KASSERT(!(m && p)); 3646 if (!m && !p) 3647 goto fail; 3648 if (p && tres) { 3649 M_PREPEND(tres, l, M_DONTWAIT); 3650 if (!tres) 3651 goto fail; 3652 memcpy(mtod(tres, void *), p, l); 3653 continue; 3654 } 3655 if (p) { 3656 m = key_alloc_mbuf(l); 3657 if (!m) 3658 goto fail; 3659 m_copyback(m, 0, l, p); 3660 } 3661 3662 if (tres) 3663 m_cat(m, tres); 3664 tres = m; 3665 } 3666 3667 m_cat(result, tres); 3668 tres = NULL; /* avoid free on error below */ 3669 3670 if (result->m_len < sizeof(struct sadb_msg)) { 3671 result = m_pullup(result, sizeof(struct sadb_msg)); 3672 if (result == NULL) 3673 goto fail; 3674 } 3675 3676 result->m_pkthdr.len = 0; 3677 for (m = result; m; m = m->m_next) 3678 result->m_pkthdr.len += m->m_len; 3679 3680 mtod(result, struct sadb_msg *)->sadb_msg_len = 3681 PFKEY_UNIT64(result->m_pkthdr.len); 3682 3683 return result; 3684 3685 fail: 3686 m_freem(result); 3687 m_freem(tres); 3688 return NULL; 3689 } 3690 3691 3692 /* 3693 * set a type in sadb_x_nat_t_type 3694 */ 3695 static struct mbuf * 3696 key_setsadbxtype(u_int16_t type) 3697 { 3698 struct mbuf *m; 3699 size_t len; 3700 struct sadb_x_nat_t_type *p; 3701 3702 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3703 3704 m = key_alloc_mbuf(len); 3705 if (!m || m->m_next) { /*XXX*/ 3706 if (m) 3707 m_freem(m); 3708 return NULL; 3709 } 3710 3711 p = mtod(m, struct sadb_x_nat_t_type *); 3712 3713 memset(p, 0, len); 3714 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3715 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3716 p->sadb_x_nat_t_type_type = type; 3717 3718 return m; 3719 } 3720 /* 3721 * set a port in sadb_x_nat_t_port. port is in network order 3722 */ 3723 static struct mbuf * 3724 key_setsadbxport(u_int16_t port, u_int16_t type) 3725 { 3726 struct mbuf *m; 3727 size_t len; 3728 struct sadb_x_nat_t_port *p; 3729 3730 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3731 3732 m = key_alloc_mbuf(len); 3733 if (!m || m->m_next) { /*XXX*/ 3734 if (m) 3735 m_freem(m); 3736 return NULL; 3737 } 3738 3739 p = mtod(m, struct sadb_x_nat_t_port *); 3740 3741 memset(p, 0, len); 3742 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3743 p->sadb_x_nat_t_port_exttype = type; 3744 p->sadb_x_nat_t_port_port = port; 3745 3746 return m; 3747 } 3748 3749 /* 3750 * set fragmentation info in sadb_x_nat_t_frag 3751 */ 3752 static struct mbuf * 3753 key_setsadbxfrag(u_int16_t flen) 3754 { 3755 struct mbuf *m; 3756 size_t len; 3757 struct sadb_x_nat_t_frag *p; 3758 3759 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3760 3761 m = key_alloc_mbuf(len); 3762 if (!m || m->m_next) { /*XXX*/ 3763 if (m) 3764 m_freem(m); 3765 return NULL; 3766 } 3767 3768 p = mtod(m, struct sadb_x_nat_t_frag *); 3769 3770 memset(p, 0, len); 3771 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3772 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3773 p->sadb_x_nat_t_frag_fraglen = flen; 3774 3775 return m; 3776 } 3777 3778 /* 3779 * Get port from sockaddr, port is in network order 3780 */ 3781 u_int16_t 3782 key_portfromsaddr(const union sockaddr_union *saddr) 3783 { 3784 u_int16_t port; 3785 3786 switch (saddr->sa.sa_family) { 3787 case AF_INET: { 3788 port = saddr->sin.sin_port; 3789 break; 3790 } 3791 #ifdef INET6 3792 case AF_INET6: { 3793 port = saddr->sin6.sin6_port; 3794 break; 3795 } 3796 #endif 3797 default: 3798 printf("%s: unexpected address family\n", __func__); 3799 port = 0; 3800 break; 3801 } 3802 3803 return port; 3804 } 3805 3806 3807 /* 3808 * Set port is struct sockaddr. port is in network order 3809 */ 3810 static void 3811 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3812 { 3813 switch (saddr->sa.sa_family) { 3814 case AF_INET: { 3815 saddr->sin.sin_port = port; 3816 break; 3817 } 3818 #ifdef INET6 3819 case AF_INET6: { 3820 saddr->sin6.sin6_port = port; 3821 break; 3822 } 3823 #endif 3824 default: 3825 printf("%s: unexpected address family %d\n", __func__, 3826 saddr->sa.sa_family); 3827 break; 3828 } 3829 3830 return; 3831 } 3832 3833 /* 3834 * Safety check sa_len 3835 */ 3836 static int 3837 key_checksalen(const union sockaddr_union *saddr) 3838 { 3839 switch (saddr->sa.sa_family) { 3840 case AF_INET: 3841 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3842 return -1; 3843 break; 3844 #ifdef INET6 3845 case AF_INET6: 3846 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3847 return -1; 3848 break; 3849 #endif 3850 default: 3851 printf("%s: unexpected sa_family %d\n", __func__, 3852 saddr->sa.sa_family); 3853 return -1; 3854 break; 3855 } 3856 return 0; 3857 } 3858 3859 3860 /* 3861 * set data into sadb_msg. 3862 */ 3863 static struct mbuf * 3864 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3865 u_int32_t seq, pid_t pid, u_int16_t reserved) 3866 { 3867 struct mbuf *m; 3868 struct sadb_msg *p; 3869 int len; 3870 3871 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3872 if (len > MCLBYTES) 3873 return NULL; 3874 MGETHDR(m, M_DONTWAIT, MT_DATA); 3875 if (m && len > MHLEN) { 3876 MCLGET(m, M_DONTWAIT); 3877 if ((m->m_flags & M_EXT) == 0) { 3878 m_freem(m); 3879 m = NULL; 3880 } 3881 } 3882 if (!m) 3883 return NULL; 3884 m->m_pkthdr.len = m->m_len = len; 3885 m->m_next = NULL; 3886 3887 p = mtod(m, struct sadb_msg *); 3888 3889 memset(p, 0, len); 3890 p->sadb_msg_version = PF_KEY_V2; 3891 p->sadb_msg_type = type; 3892 p->sadb_msg_errno = 0; 3893 p->sadb_msg_satype = satype; 3894 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3895 p->sadb_msg_reserved = reserved; 3896 p->sadb_msg_seq = seq; 3897 p->sadb_msg_pid = (u_int32_t)pid; 3898 3899 return m; 3900 } 3901 3902 /* 3903 * copy secasvar data into sadb_address. 3904 */ 3905 static struct mbuf * 3906 key_setsadbsa(struct secasvar *sav) 3907 { 3908 struct mbuf *m; 3909 struct sadb_sa *p; 3910 int len; 3911 3912 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3913 m = key_alloc_mbuf(len); 3914 if (!m || m->m_next) { /*XXX*/ 3915 if (m) 3916 m_freem(m); 3917 return NULL; 3918 } 3919 3920 p = mtod(m, struct sadb_sa *); 3921 3922 memset(p, 0, len); 3923 p->sadb_sa_len = PFKEY_UNIT64(len); 3924 p->sadb_sa_exttype = SADB_EXT_SA; 3925 p->sadb_sa_spi = sav->spi; 3926 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3927 p->sadb_sa_state = sav->state; 3928 p->sadb_sa_auth = sav->alg_auth; 3929 p->sadb_sa_encrypt = sav->alg_enc; 3930 p->sadb_sa_flags = sav->flags; 3931 3932 return m; 3933 } 3934 3935 /* 3936 * set data into sadb_address. 3937 */ 3938 static struct mbuf * 3939 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3940 u_int8_t prefixlen, u_int16_t ul_proto) 3941 { 3942 struct mbuf *m; 3943 struct sadb_address *p; 3944 size_t len; 3945 3946 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3947 PFKEY_ALIGN8(saddr->sa_len); 3948 m = key_alloc_mbuf(len); 3949 if (!m || m->m_next) { /*XXX*/ 3950 if (m) 3951 m_freem(m); 3952 return NULL; 3953 } 3954 3955 p = mtod(m, struct sadb_address *); 3956 3957 memset(p, 0, len); 3958 p->sadb_address_len = PFKEY_UNIT64(len); 3959 p->sadb_address_exttype = exttype; 3960 p->sadb_address_proto = ul_proto; 3961 if (prefixlen == FULLMASK) { 3962 switch (saddr->sa_family) { 3963 case AF_INET: 3964 prefixlen = sizeof(struct in_addr) << 3; 3965 break; 3966 case AF_INET6: 3967 prefixlen = sizeof(struct in6_addr) << 3; 3968 break; 3969 default: 3970 ; /*XXX*/ 3971 } 3972 } 3973 p->sadb_address_prefixlen = prefixlen; 3974 p->sadb_address_reserved = 0; 3975 3976 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3977 saddr, saddr->sa_len); 3978 3979 return m; 3980 } 3981 3982 #if 0 3983 /* 3984 * set data into sadb_ident. 3985 */ 3986 static struct mbuf * 3987 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3988 void *string, int stringlen, u_int64_t id) 3989 { 3990 struct mbuf *m; 3991 struct sadb_ident *p; 3992 size_t len; 3993 3994 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3995 m = key_alloc_mbuf(len); 3996 if (!m || m->m_next) { /*XXX*/ 3997 if (m) 3998 m_freem(m); 3999 return NULL; 4000 } 4001 4002 p = mtod(m, struct sadb_ident *); 4003 4004 memset(p, 0, len); 4005 p->sadb_ident_len = PFKEY_UNIT64(len); 4006 p->sadb_ident_exttype = exttype; 4007 p->sadb_ident_type = idtype; 4008 p->sadb_ident_reserved = 0; 4009 p->sadb_ident_id = id; 4010 4011 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 4012 string, stringlen); 4013 4014 return m; 4015 } 4016 #endif 4017 4018 /* 4019 * set data into sadb_x_sa2. 4020 */ 4021 static struct mbuf * 4022 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 4023 { 4024 struct mbuf *m; 4025 struct sadb_x_sa2 *p; 4026 size_t len; 4027 4028 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4029 m = key_alloc_mbuf(len); 4030 if (!m || m->m_next) { /*XXX*/ 4031 if (m) 4032 m_freem(m); 4033 return NULL; 4034 } 4035 4036 p = mtod(m, struct sadb_x_sa2 *); 4037 4038 memset(p, 0, len); 4039 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4040 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4041 p->sadb_x_sa2_mode = mode; 4042 p->sadb_x_sa2_reserved1 = 0; 4043 p->sadb_x_sa2_reserved2 = 0; 4044 p->sadb_x_sa2_sequence = seq; 4045 p->sadb_x_sa2_reqid = reqid; 4046 4047 return m; 4048 } 4049 4050 /* 4051 * set data into sadb_x_policy 4052 */ 4053 static struct mbuf * 4054 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 4055 { 4056 struct mbuf *m; 4057 struct sadb_x_policy *p; 4058 size_t len; 4059 4060 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4061 m = key_alloc_mbuf(len); 4062 if (!m || m->m_next) { /*XXX*/ 4063 if (m) 4064 m_freem(m); 4065 return NULL; 4066 } 4067 4068 p = mtod(m, struct sadb_x_policy *); 4069 4070 memset(p, 0, len); 4071 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4072 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4073 p->sadb_x_policy_type = type; 4074 p->sadb_x_policy_dir = dir; 4075 p->sadb_x_policy_id = id; 4076 4077 return m; 4078 } 4079 4080 /* %%% utilities */ 4081 /* 4082 * copy a buffer into the new buffer allocated. 4083 */ 4084 static void * 4085 key_newbuf(const void *src, u_int len) 4086 { 4087 void *new; 4088 4089 KMALLOC(new, void *, len); 4090 if (new == NULL) { 4091 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 4092 return NULL; 4093 } 4094 memcpy(new, src, len); 4095 4096 return new; 4097 } 4098 4099 /* compare my own address 4100 * OUT: 1: true, i.e. my address. 4101 * 0: false 4102 */ 4103 int 4104 key_ismyaddr(const struct sockaddr *sa) 4105 { 4106 #ifdef INET 4107 const struct sockaddr_in *sin; 4108 const struct in_ifaddr *ia; 4109 int s; 4110 #endif 4111 4112 KASSERT(sa != NULL); 4113 4114 switch (sa->sa_family) { 4115 #ifdef INET 4116 case AF_INET: 4117 sin = (const struct sockaddr_in *)sa; 4118 s = pserialize_read_enter(); 4119 IN_ADDRLIST_READER_FOREACH(ia) { 4120 if (sin->sin_family == ia->ia_addr.sin_family && 4121 sin->sin_len == ia->ia_addr.sin_len && 4122 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4123 { 4124 pserialize_read_exit(s); 4125 return 1; 4126 } 4127 } 4128 pserialize_read_exit(s); 4129 break; 4130 #endif 4131 #ifdef INET6 4132 case AF_INET6: 4133 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4134 #endif 4135 } 4136 4137 return 0; 4138 } 4139 4140 #ifdef INET6 4141 /* 4142 * compare my own address for IPv6. 4143 * 1: ours 4144 * 0: other 4145 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4146 */ 4147 #include <netinet6/in6_var.h> 4148 4149 static int 4150 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4151 { 4152 struct in6_ifaddr *ia; 4153 int s; 4154 struct psref psref; 4155 int bound; 4156 int ours = 1; 4157 4158 bound = curlwp_bind(); 4159 s = pserialize_read_enter(); 4160 IN6_ADDRLIST_READER_FOREACH(ia) { 4161 bool ingroup; 4162 4163 if (key_sockaddrcmp((const struct sockaddr *)&sin6, 4164 (const struct sockaddr *)&ia->ia_addr, 0) == 0) { 4165 pserialize_read_exit(s); 4166 goto ours; 4167 } 4168 ia6_acquire(ia, &psref); 4169 pserialize_read_exit(s); 4170 4171 /* 4172 * XXX Multicast 4173 * XXX why do we care about multlicast here while we don't care 4174 * about IPv4 multicast?? 4175 * XXX scope 4176 */ 4177 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4178 if (ingroup) { 4179 ia6_release(ia, &psref); 4180 goto ours; 4181 } 4182 4183 s = pserialize_read_enter(); 4184 ia6_release(ia, &psref); 4185 } 4186 pserialize_read_exit(s); 4187 4188 /* loopback, just for safety */ 4189 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4190 goto ours; 4191 4192 ours = 0; 4193 ours: 4194 curlwp_bindx(bound); 4195 4196 return ours; 4197 } 4198 #endif /*INET6*/ 4199 4200 /* 4201 * compare two secasindex structure. 4202 * flag can specify to compare 2 saidxes. 4203 * compare two secasindex structure without both mode and reqid. 4204 * don't compare port. 4205 * IN: 4206 * saidx0: source, it can be in SAD. 4207 * saidx1: object. 4208 * OUT: 4209 * 1 : equal 4210 * 0 : not equal 4211 */ 4212 static int 4213 key_cmpsaidx( 4214 const struct secasindex *saidx0, 4215 const struct secasindex *saidx1, 4216 int flag) 4217 { 4218 int chkport; 4219 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4220 4221 /* sanity */ 4222 if (saidx0 == NULL && saidx1 == NULL) 4223 return 1; 4224 4225 if (saidx0 == NULL || saidx1 == NULL) 4226 return 0; 4227 4228 if (saidx0->proto != saidx1->proto) 4229 return 0; 4230 4231 if (flag == CMP_EXACTLY) { 4232 if (saidx0->mode != saidx1->mode) 4233 return 0; 4234 if (saidx0->reqid != saidx1->reqid) 4235 return 0; 4236 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4237 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4238 return 0; 4239 } else { 4240 4241 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4242 if (flag == CMP_MODE_REQID 4243 ||flag == CMP_REQID) { 4244 /* 4245 * If reqid of SPD is non-zero, unique SA is required. 4246 * The result must be of same reqid in this case. 4247 */ 4248 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4249 return 0; 4250 } 4251 4252 if (flag == CMP_MODE_REQID) { 4253 if (saidx0->mode != IPSEC_MODE_ANY 4254 && saidx0->mode != saidx1->mode) 4255 return 0; 4256 } 4257 4258 4259 sa0src = &saidx0->src.sa; 4260 sa0dst = &saidx0->dst.sa; 4261 sa1src = &saidx1->src.sa; 4262 sa1dst = &saidx1->dst.sa; 4263 /* 4264 * If NAT-T is enabled, check ports for tunnel mode. 4265 * Don't do it for transport mode, as there is no 4266 * port information available in the SP. 4267 * Also don't check ports if they are set to zero 4268 * in the SPD: This means we have a non-generated 4269 * SPD which can't know UDP ports. 4270 */ 4271 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4272 chkport = PORT_LOOSE; 4273 else 4274 chkport = PORT_NONE; 4275 4276 if (key_sockaddrcmp(sa0src, sa1src, chkport) != 0) { 4277 return 0; 4278 } 4279 if (key_sockaddrcmp(sa0dst, sa1dst, chkport) != 0) { 4280 return 0; 4281 } 4282 } 4283 4284 return 1; 4285 } 4286 4287 /* 4288 * compare two secindex structure exactly. 4289 * IN: 4290 * spidx0: source, it is often in SPD. 4291 * spidx1: object, it is often from PFKEY message. 4292 * OUT: 4293 * 1 : equal 4294 * 0 : not equal 4295 */ 4296 int 4297 key_cmpspidx_exactly( 4298 const struct secpolicyindex *spidx0, 4299 const struct secpolicyindex *spidx1) 4300 { 4301 /* sanity */ 4302 if (spidx0 == NULL && spidx1 == NULL) 4303 return 1; 4304 4305 if (spidx0 == NULL || spidx1 == NULL) 4306 return 0; 4307 4308 if (spidx0->prefs != spidx1->prefs 4309 || spidx0->prefd != spidx1->prefd 4310 || spidx0->ul_proto != spidx1->ul_proto) 4311 return 0; 4312 4313 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) == 0 && 4314 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT) == 0; 4315 } 4316 4317 /* 4318 * compare two secindex structure with mask. 4319 * IN: 4320 * spidx0: source, it is often in SPD. 4321 * spidx1: object, it is often from IP header. 4322 * OUT: 4323 * 1 : equal 4324 * 0 : not equal 4325 */ 4326 int 4327 key_cmpspidx_withmask( 4328 const struct secpolicyindex *spidx0, 4329 const struct secpolicyindex *spidx1) 4330 { 4331 /* sanity */ 4332 if (spidx0 == NULL && spidx1 == NULL) 4333 return 1; 4334 4335 if (spidx0 == NULL || spidx1 == NULL) 4336 return 0; 4337 4338 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4339 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4340 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4341 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4342 return 0; 4343 4344 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4345 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4346 && spidx0->ul_proto != spidx1->ul_proto) 4347 return 0; 4348 4349 switch (spidx0->src.sa.sa_family) { 4350 case AF_INET: 4351 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4352 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4353 return 0; 4354 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4355 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4356 return 0; 4357 break; 4358 case AF_INET6: 4359 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4360 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4361 return 0; 4362 /* 4363 * scope_id check. if sin6_scope_id is 0, we regard it 4364 * as a wildcard scope, which matches any scope zone ID. 4365 */ 4366 if (spidx0->src.sin6.sin6_scope_id && 4367 spidx1->src.sin6.sin6_scope_id && 4368 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4369 return 0; 4370 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4371 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4372 return 0; 4373 break; 4374 default: 4375 /* XXX */ 4376 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4377 return 0; 4378 break; 4379 } 4380 4381 switch (spidx0->dst.sa.sa_family) { 4382 case AF_INET: 4383 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4384 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4385 return 0; 4386 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4387 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4388 return 0; 4389 break; 4390 case AF_INET6: 4391 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4392 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4393 return 0; 4394 /* 4395 * scope_id check. if sin6_scope_id is 0, we regard it 4396 * as a wildcard scope, which matches any scope zone ID. 4397 */ 4398 if (spidx0->src.sin6.sin6_scope_id && 4399 spidx1->src.sin6.sin6_scope_id && 4400 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4401 return 0; 4402 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4403 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4404 return 0; 4405 break; 4406 default: 4407 /* XXX */ 4408 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4409 return 0; 4410 break; 4411 } 4412 4413 /* XXX Do we check other field ? e.g. flowinfo */ 4414 4415 return 1; 4416 } 4417 4418 /* returns 0 on match */ 4419 static int 4420 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4421 { 4422 switch (howport) { 4423 case PORT_NONE: 4424 return 0; 4425 case PORT_LOOSE: 4426 if (port1 == 0 || port2 == 0) 4427 return 0; 4428 /*FALLTHROUGH*/ 4429 case PORT_STRICT: 4430 if (port1 != port2) { 4431 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4432 "port fail %d != %d\n", port1, port2); 4433 return 1; 4434 } 4435 return 0; 4436 default: 4437 KASSERT(0); 4438 return 1; 4439 } 4440 } 4441 4442 /* returns 0 on match */ 4443 static int 4444 key_sockaddrcmp( 4445 const struct sockaddr *sa1, 4446 const struct sockaddr *sa2, 4447 int howport) 4448 { 4449 const struct sockaddr_in *sin1, *sin2; 4450 const struct sockaddr_in6 *sin61, *sin62; 4451 4452 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4453 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4454 "fam/len fail %d != %d || %d != %d\n", 4455 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4456 sa2->sa_len); 4457 return 1; 4458 } 4459 4460 switch (sa1->sa_family) { 4461 case AF_INET: 4462 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4463 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4464 "len fail %d != %zu\n", 4465 sa1->sa_len, sizeof(struct sockaddr_in)); 4466 return 1; 4467 } 4468 sin1 = (const struct sockaddr_in *)sa1; 4469 sin2 = (const struct sockaddr_in *)sa2; 4470 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4471 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4472 "addr fail %#x != %#x\n", 4473 sin1->sin_addr.s_addr, sin2->sin_addr.s_addr); 4474 return 1; 4475 } 4476 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4477 return 1; 4478 } 4479 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4480 "addr success %#x[%d] == %#x[%d]\n", 4481 sin1->sin_addr.s_addr, sin1->sin_port, 4482 sin2->sin_addr.s_addr, sin2->sin_port); 4483 break; 4484 case AF_INET6: 4485 sin61 = (const struct sockaddr_in6 *)sa1; 4486 sin62 = (const struct sockaddr_in6 *)sa2; 4487 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4488 return 1; /*EINVAL*/ 4489 4490 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4491 return 1; 4492 } 4493 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4494 return 1; 4495 } 4496 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4497 return 1; 4498 } 4499 break; 4500 default: 4501 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4502 return 1; 4503 break; 4504 } 4505 4506 return 0; 4507 } 4508 4509 /* 4510 * compare two buffers with mask. 4511 * IN: 4512 * addr1: source 4513 * addr2: object 4514 * bits: Number of bits to compare 4515 * OUT: 4516 * 1 : equal 4517 * 0 : not equal 4518 */ 4519 static int 4520 key_bbcmp(const void *a1, const void *a2, u_int bits) 4521 { 4522 const unsigned char *p1 = a1; 4523 const unsigned char *p2 = a2; 4524 4525 /* XXX: This could be considerably faster if we compare a word 4526 * at a time, but it is complicated on LSB Endian machines */ 4527 4528 /* Handle null pointers */ 4529 if (p1 == NULL || p2 == NULL) 4530 return (p1 == p2); 4531 4532 while (bits >= 8) { 4533 if (*p1++ != *p2++) 4534 return 0; 4535 bits -= 8; 4536 } 4537 4538 if (bits > 0) { 4539 u_int8_t mask = ~((1<<(8-bits))-1); 4540 if ((*p1 & mask) != (*p2 & mask)) 4541 return 0; 4542 } 4543 return 1; /* Match! */ 4544 } 4545 4546 /* 4547 * time handler. 4548 * scanning SPD and SAD to check status for each entries, 4549 * and do to remove or to expire. 4550 */ 4551 void 4552 key_timehandler(void* arg) 4553 { 4554 u_int dir; 4555 int s; 4556 time_t now = time_uptime; 4557 4558 s = splsoftnet(); /*called from softclock()*/ 4559 mutex_enter(softnet_lock); 4560 4561 /* SPD */ 4562 { 4563 struct secpolicy *sp, *nextsp; 4564 4565 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4566 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 4567 if (sp->state == IPSEC_SPSTATE_DEAD) { 4568 key_sp_unlink(sp); /*XXX*/ 4569 4570 /* 'sp' dead; continue transfers to 4571 * 'sp = nextsp' 4572 */ 4573 continue; 4574 } 4575 4576 if (sp->lifetime == 0 && sp->validtime == 0) 4577 continue; 4578 4579 /* the deletion will occur next time */ 4580 if ((sp->lifetime && now - sp->created > sp->lifetime) 4581 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4582 key_sp_dead(sp); 4583 key_spdexpire(sp); 4584 continue; 4585 } 4586 } 4587 } 4588 } 4589 4590 /* SAD */ 4591 { 4592 struct secashead *sah, *nextsah; 4593 struct secasvar *sav, *nextsav; 4594 4595 LIST_FOREACH_SAFE(sah, &sahtree, chain, nextsah) { 4596 /* if sah has been dead, then delete it and process next sah. */ 4597 if (sah->state == SADB_SASTATE_DEAD) { 4598 key_delsah(sah); 4599 continue; 4600 } 4601 4602 /* if LARVAL entry doesn't become MATURE, delete it. */ 4603 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], 4604 chain, nextsav) { 4605 if (now - sav->created > key_larval_lifetime) { 4606 KEY_FREESAV(&sav); 4607 } 4608 } 4609 4610 /* 4611 * check MATURE entry to start to send expire message 4612 * whether or not. 4613 */ 4614 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], 4615 chain, nextsav) { 4616 /* we don't need to check. */ 4617 if (sav->lft_s == NULL) 4618 continue; 4619 4620 /* sanity check */ 4621 if (sav->lft_c == NULL) { 4622 ipseclog((LOG_DEBUG,"key_timehandler: " 4623 "There is no CURRENT time, why?\n")); 4624 continue; 4625 } 4626 4627 /* check SOFT lifetime */ 4628 if (sav->lft_s->sadb_lifetime_addtime != 0 4629 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4630 /* 4631 * check SA to be used whether or not. 4632 * when SA hasn't been used, delete it. 4633 */ 4634 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4635 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4636 KEY_FREESAV(&sav); 4637 } else { 4638 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4639 /* 4640 * XXX If we keep to send expire 4641 * message in the status of 4642 * DYING. Do remove below code. 4643 */ 4644 key_expire(sav); 4645 } 4646 } 4647 /* check SOFT lifetime by bytes */ 4648 /* 4649 * XXX I don't know the way to delete this SA 4650 * when new SA is installed. Caution when it's 4651 * installed too big lifetime by time. 4652 */ 4653 else if (sav->lft_s->sadb_lifetime_bytes != 0 4654 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4655 4656 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4657 /* 4658 * XXX If we keep to send expire 4659 * message in the status of 4660 * DYING. Do remove below code. 4661 */ 4662 key_expire(sav); 4663 } 4664 } 4665 4666 /* check DYING entry to change status to DEAD. */ 4667 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], 4668 chain, nextsav) { 4669 /* we don't need to check. */ 4670 if (sav->lft_h == NULL) 4671 continue; 4672 4673 /* sanity check */ 4674 if (sav->lft_c == NULL) { 4675 ipseclog((LOG_DEBUG, "key_timehandler: " 4676 "There is no CURRENT time, why?\n")); 4677 continue; 4678 } 4679 4680 if (sav->lft_h->sadb_lifetime_addtime != 0 4681 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4682 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4683 KEY_FREESAV(&sav); 4684 } 4685 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4686 else if (sav->lft_s != NULL 4687 && sav->lft_s->sadb_lifetime_addtime != 0 4688 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4689 /* 4690 * XXX: should be checked to be 4691 * installed the valid SA. 4692 */ 4693 4694 /* 4695 * If there is no SA then sending 4696 * expire message. 4697 */ 4698 key_expire(sav); 4699 } 4700 #endif 4701 /* check HARD lifetime by bytes */ 4702 else if (sav->lft_h->sadb_lifetime_bytes != 0 4703 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4704 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4705 KEY_FREESAV(&sav); 4706 } 4707 } 4708 4709 /* delete entry in DEAD */ 4710 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], 4711 chain, nextsav) { 4712 /* sanity check */ 4713 if (sav->state != SADB_SASTATE_DEAD) { 4714 ipseclog((LOG_DEBUG, "key_timehandler: " 4715 "invalid sav->state " 4716 "(queue: %d SA: %d): " 4717 "kill it anyway\n", 4718 SADB_SASTATE_DEAD, sav->state)); 4719 } 4720 4721 /* 4722 * do not call key_freesav() here. 4723 * sav should already be freed, and sav->refcnt 4724 * shows other references to sav 4725 * (such as from SPD). 4726 */ 4727 } 4728 } 4729 } 4730 4731 #ifndef IPSEC_NONBLOCK_ACQUIRE 4732 /* ACQ tree */ 4733 { 4734 struct secacq *acq, *nextacq; 4735 4736 LIST_FOREACH_SAFE(acq, &acqtree, chain, nextacq) { 4737 if (now - acq->created > key_blockacq_lifetime 4738 && __LIST_CHAINED(acq)) { 4739 LIST_REMOVE(acq, chain); 4740 KFREE(acq); 4741 } 4742 } 4743 } 4744 #endif 4745 4746 /* SP ACQ tree */ 4747 { 4748 struct secspacq *acq, *nextacq; 4749 4750 LIST_FOREACH_SAFE(acq, &spacqtree, chain, nextacq) { 4751 if (now - acq->created > key_blockacq_lifetime 4752 && __LIST_CHAINED(acq)) { 4753 LIST_REMOVE(acq, chain); 4754 KFREE(acq); 4755 } 4756 } 4757 } 4758 4759 /* do exchange to tick time !! */ 4760 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4761 4762 mutex_exit(softnet_lock); 4763 splx(s); 4764 return; 4765 } 4766 4767 u_long 4768 key_random(void) 4769 { 4770 u_long value; 4771 4772 key_randomfill(&value, sizeof(value)); 4773 return value; 4774 } 4775 4776 void 4777 key_randomfill(void *p, size_t l) 4778 { 4779 4780 cprng_fast(p, l); 4781 } 4782 4783 /* 4784 * map SADB_SATYPE_* to IPPROTO_*. 4785 * if satype == SADB_SATYPE then satype is mapped to ~0. 4786 * OUT: 4787 * 0: invalid satype. 4788 */ 4789 static u_int16_t 4790 key_satype2proto(u_int8_t satype) 4791 { 4792 switch (satype) { 4793 case SADB_SATYPE_UNSPEC: 4794 return IPSEC_PROTO_ANY; 4795 case SADB_SATYPE_AH: 4796 return IPPROTO_AH; 4797 case SADB_SATYPE_ESP: 4798 return IPPROTO_ESP; 4799 case SADB_X_SATYPE_IPCOMP: 4800 return IPPROTO_IPCOMP; 4801 case SADB_X_SATYPE_TCPSIGNATURE: 4802 return IPPROTO_TCP; 4803 default: 4804 return 0; 4805 } 4806 /* NOTREACHED */ 4807 } 4808 4809 /* 4810 * map IPPROTO_* to SADB_SATYPE_* 4811 * OUT: 4812 * 0: invalid protocol type. 4813 */ 4814 static u_int8_t 4815 key_proto2satype(u_int16_t proto) 4816 { 4817 switch (proto) { 4818 case IPPROTO_AH: 4819 return SADB_SATYPE_AH; 4820 case IPPROTO_ESP: 4821 return SADB_SATYPE_ESP; 4822 case IPPROTO_IPCOMP: 4823 return SADB_X_SATYPE_IPCOMP; 4824 case IPPROTO_TCP: 4825 return SADB_X_SATYPE_TCPSIGNATURE; 4826 default: 4827 return 0; 4828 } 4829 /* NOTREACHED */ 4830 } 4831 4832 static int 4833 key_setsecasidx(int proto, int mode, int reqid, 4834 const struct sadb_address * src, 4835 const struct sadb_address * dst, 4836 struct secasindex * saidx) 4837 { 4838 const union sockaddr_union * src_u = 4839 (const union sockaddr_union *) src; 4840 const union sockaddr_union * dst_u = 4841 (const union sockaddr_union *) dst; 4842 4843 /* sa len safety check */ 4844 if (key_checksalen(src_u) != 0) 4845 return -1; 4846 if (key_checksalen(dst_u) != 0) 4847 return -1; 4848 4849 memset(saidx, 0, sizeof(*saidx)); 4850 saidx->proto = proto; 4851 saidx->mode = mode; 4852 saidx->reqid = reqid; 4853 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4854 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4855 4856 key_porttosaddr(&((saidx)->src),0); 4857 key_porttosaddr(&((saidx)->dst),0); 4858 return 0; 4859 } 4860 4861 /* %%% PF_KEY */ 4862 /* 4863 * SADB_GETSPI processing is to receive 4864 * <base, (SA2), src address, dst address, (SPI range)> 4865 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4866 * tree with the status of LARVAL, and send 4867 * <base, SA(*), address(SD)> 4868 * to the IKMPd. 4869 * 4870 * IN: mhp: pointer to the pointer to each header. 4871 * OUT: NULL if fail. 4872 * other if success, return pointer to the message to send. 4873 */ 4874 static int 4875 key_getspi(struct socket *so, struct mbuf *m, 4876 const struct sadb_msghdr *mhp) 4877 { 4878 struct sadb_address *src0, *dst0; 4879 struct secasindex saidx; 4880 struct secashead *newsah; 4881 struct secasvar *newsav; 4882 u_int8_t proto; 4883 u_int32_t spi; 4884 u_int8_t mode; 4885 u_int16_t reqid; 4886 int error; 4887 4888 KASSERT(so != NULL); 4889 KASSERT(m != NULL); 4890 KASSERT(mhp != NULL); 4891 KASSERT(mhp->msg != NULL); 4892 4893 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4894 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4895 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4896 return key_senderror(so, m, EINVAL); 4897 } 4898 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4899 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4900 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4901 return key_senderror(so, m, EINVAL); 4902 } 4903 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4904 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4905 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4906 } else { 4907 mode = IPSEC_MODE_ANY; 4908 reqid = 0; 4909 } 4910 4911 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4912 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4913 4914 /* map satype to proto */ 4915 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4916 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4917 return key_senderror(so, m, EINVAL); 4918 } 4919 4920 4921 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 4922 dst0 + 1, &saidx)) != 0) 4923 return key_senderror(so, m, EINVAL); 4924 4925 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 4926 return key_senderror(so, m, EINVAL); 4927 4928 /* SPI allocation */ 4929 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4930 &saidx); 4931 if (spi == 0) 4932 return key_senderror(so, m, EINVAL); 4933 4934 /* get a SA index */ 4935 if ((newsah = key_getsah(&saidx)) == NULL) { 4936 /* create a new SA index */ 4937 if ((newsah = key_newsah(&saidx)) == NULL) { 4938 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4939 return key_senderror(so, m, ENOBUFS); 4940 } 4941 } 4942 4943 /* get a new SA */ 4944 /* XXX rewrite */ 4945 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4946 if (newsav == NULL) { 4947 /* XXX don't free new SA index allocated in above. */ 4948 return key_senderror(so, m, error); 4949 } 4950 4951 /* set spi */ 4952 newsav->spi = htonl(spi); 4953 4954 #ifndef IPSEC_NONBLOCK_ACQUIRE 4955 /* delete the entry in acqtree */ 4956 if (mhp->msg->sadb_msg_seq != 0) { 4957 struct secacq *acq; 4958 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4959 /* reset counter in order to deletion by timehandler. */ 4960 acq->created = time_uptime; 4961 acq->count = 0; 4962 } 4963 } 4964 #endif 4965 4966 { 4967 struct mbuf *n, *nn; 4968 struct sadb_sa *m_sa; 4969 struct sadb_msg *newmsg; 4970 int off, len; 4971 4972 /* create new sadb_msg to reply. */ 4973 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4974 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4975 if (len > MCLBYTES) 4976 return key_senderror(so, m, ENOBUFS); 4977 4978 MGETHDR(n, M_DONTWAIT, MT_DATA); 4979 if (len > MHLEN) { 4980 MCLGET(n, M_DONTWAIT); 4981 if ((n->m_flags & M_EXT) == 0) { 4982 m_freem(n); 4983 n = NULL; 4984 } 4985 } 4986 if (!n) 4987 return key_senderror(so, m, ENOBUFS); 4988 4989 n->m_len = len; 4990 n->m_next = NULL; 4991 off = 0; 4992 4993 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4994 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4995 4996 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4997 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4998 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4999 m_sa->sadb_sa_spi = htonl(spi); 5000 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5001 5002 KASSERTMSG(off == len, "length inconsistency"); 5003 5004 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 5005 SADB_EXT_ADDRESS_DST); 5006 if (!n->m_next) { 5007 m_freem(n); 5008 return key_senderror(so, m, ENOBUFS); 5009 } 5010 5011 if (n->m_len < sizeof(struct sadb_msg)) { 5012 n = m_pullup(n, sizeof(struct sadb_msg)); 5013 if (n == NULL) 5014 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 5015 } 5016 5017 n->m_pkthdr.len = 0; 5018 for (nn = n; nn; nn = nn->m_next) 5019 n->m_pkthdr.len += nn->m_len; 5020 5021 newmsg = mtod(n, struct sadb_msg *); 5022 newmsg->sadb_msg_seq = newsav->seq; 5023 newmsg->sadb_msg_errno = 0; 5024 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5025 5026 m_freem(m); 5027 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5028 } 5029 } 5030 5031 /* 5032 * allocating new SPI 5033 * called by key_getspi(). 5034 * OUT: 5035 * 0: failure. 5036 * others: success. 5037 */ 5038 static u_int32_t 5039 key_do_getnewspi(const struct sadb_spirange *spirange, 5040 const struct secasindex *saidx) 5041 { 5042 u_int32_t newspi; 5043 u_int32_t spmin, spmax; 5044 int count = key_spi_trycnt; 5045 5046 /* set spi range to allocate */ 5047 if (spirange != NULL) { 5048 spmin = spirange->sadb_spirange_min; 5049 spmax = spirange->sadb_spirange_max; 5050 } else { 5051 spmin = key_spi_minval; 5052 spmax = key_spi_maxval; 5053 } 5054 /* IPCOMP needs 2-byte SPI */ 5055 if (saidx->proto == IPPROTO_IPCOMP) { 5056 u_int32_t t; 5057 if (spmin >= 0x10000) 5058 spmin = 0xffff; 5059 if (spmax >= 0x10000) 5060 spmax = 0xffff; 5061 if (spmin > spmax) { 5062 t = spmin; spmin = spmax; spmax = t; 5063 } 5064 } 5065 5066 if (spmin == spmax) { 5067 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5068 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 5069 return 0; 5070 } 5071 5072 count--; /* taking one cost. */ 5073 newspi = spmin; 5074 5075 } else { 5076 5077 /* init SPI */ 5078 newspi = 0; 5079 5080 /* when requesting to allocate spi ranged */ 5081 while (count--) { 5082 /* generate pseudo-random SPI value ranged. */ 5083 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5084 5085 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5086 break; 5087 } 5088 5089 if (count == 0 || newspi == 0) { 5090 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 5091 return 0; 5092 } 5093 } 5094 5095 /* statistics */ 5096 keystat.getspi_count = 5097 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5098 5099 return newspi; 5100 } 5101 5102 static int 5103 key_handle_natt_info(struct secasvar *sav, 5104 const struct sadb_msghdr *mhp) 5105 { 5106 const char *msg = "?" ; 5107 struct sadb_x_nat_t_type *type; 5108 struct sadb_x_nat_t_port *sport, *dport; 5109 struct sadb_address *iaddr, *raddr; 5110 struct sadb_x_nat_t_frag *frag; 5111 5112 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5113 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5114 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5115 return 0; 5116 5117 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5118 msg = "TYPE"; 5119 goto bad; 5120 } 5121 5122 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5123 msg = "SPORT"; 5124 goto bad; 5125 } 5126 5127 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5128 msg = "DPORT"; 5129 goto bad; 5130 } 5131 5132 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5133 ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n", __func__)); 5134 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5135 msg = "OAI"; 5136 goto bad; 5137 } 5138 } 5139 5140 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5141 ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n", __func__)); 5142 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5143 msg = "OAR"; 5144 goto bad; 5145 } 5146 } 5147 5148 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5149 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5150 msg = "FRAG"; 5151 goto bad; 5152 } 5153 } 5154 5155 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5156 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5157 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5158 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5159 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5160 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5161 5162 ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n", 5163 __func__, type->sadb_x_nat_t_type_type, 5164 ntohs(sport->sadb_x_nat_t_port_port), 5165 ntohs(dport->sadb_x_nat_t_port_port))); 5166 5167 sav->natt_type = type->sadb_x_nat_t_type_type; 5168 key_porttosaddr(&sav->sah->saidx.src, 5169 sport->sadb_x_nat_t_port_port); 5170 key_porttosaddr(&sav->sah->saidx.dst, 5171 dport->sadb_x_nat_t_port_port); 5172 if (frag) 5173 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5174 else 5175 sav->esp_frag = IP_MAXPACKET; 5176 5177 return 0; 5178 bad: 5179 ipseclog((LOG_DEBUG, "%s: invalid message %s\n", __func__, msg)); 5180 __USE(msg); 5181 return -1; 5182 } 5183 5184 /* Just update the IPSEC_NAT_T ports if present */ 5185 static int 5186 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5187 const struct sadb_msghdr *mhp) 5188 { 5189 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5190 ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n", __func__)); 5191 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5192 ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n", __func__)); 5193 5194 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5195 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5196 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5197 struct sadb_x_nat_t_type *type; 5198 struct sadb_x_nat_t_port *sport; 5199 struct sadb_x_nat_t_port *dport; 5200 5201 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5202 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5203 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5204 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5205 __func__)); 5206 return -1; 5207 } 5208 5209 type = (struct sadb_x_nat_t_type *) 5210 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5211 sport = (struct sadb_x_nat_t_port *) 5212 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5213 dport = (struct sadb_x_nat_t_port *) 5214 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5215 5216 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5217 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5218 5219 ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n", 5220 __func__, type->sadb_x_nat_t_type_type, 5221 ntohs(sport->sadb_x_nat_t_port_port), 5222 ntohs(dport->sadb_x_nat_t_port_port))); 5223 } 5224 5225 return 0; 5226 } 5227 5228 5229 /* 5230 * SADB_UPDATE processing 5231 * receive 5232 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5233 * key(AE), (identity(SD),) (sensitivity)> 5234 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5235 * and send 5236 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5237 * (identity(SD),) (sensitivity)> 5238 * to the ikmpd. 5239 * 5240 * m will always be freed. 5241 */ 5242 static int 5243 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5244 { 5245 struct sadb_sa *sa0; 5246 struct sadb_address *src0, *dst0; 5247 struct secasindex saidx; 5248 struct secashead *sah; 5249 struct secasvar *sav; 5250 u_int16_t proto; 5251 u_int8_t mode; 5252 u_int16_t reqid; 5253 int error; 5254 5255 KASSERT(so != NULL); 5256 KASSERT(m != NULL); 5257 KASSERT(mhp != NULL); 5258 KASSERT(mhp->msg != NULL); 5259 5260 /* map satype to proto */ 5261 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5262 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 5263 return key_senderror(so, m, EINVAL); 5264 } 5265 5266 if (mhp->ext[SADB_EXT_SA] == NULL || 5267 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5268 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5269 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5270 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5271 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5272 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5273 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5274 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5275 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5276 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5277 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5278 return key_senderror(so, m, EINVAL); 5279 } 5280 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5281 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5282 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5283 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5284 return key_senderror(so, m, EINVAL); 5285 } 5286 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5287 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5288 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5289 } else { 5290 mode = IPSEC_MODE_ANY; 5291 reqid = 0; 5292 } 5293 /* XXX boundary checking for other extensions */ 5294 5295 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5296 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5297 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5298 5299 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5300 dst0 + 1, &saidx)) != 0) 5301 return key_senderror(so, m, EINVAL); 5302 5303 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5304 return key_senderror(so, m, EINVAL); 5305 5306 /* get a SA header */ 5307 if ((sah = key_getsah(&saidx)) == NULL) { 5308 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 5309 return key_senderror(so, m, ENOENT); 5310 } 5311 5312 /* set spidx if there */ 5313 /* XXX rewrite */ 5314 error = key_setident(sah, m, mhp); 5315 if (error) 5316 return key_senderror(so, m, error); 5317 5318 /* find a SA with sequence number. */ 5319 #ifdef IPSEC_DOSEQCHECK 5320 if (mhp->msg->sadb_msg_seq != 0 5321 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5322 ipseclog((LOG_DEBUG, 5323 "key_update: no larval SA with sequence %u exists.\n", 5324 mhp->msg->sadb_msg_seq)); 5325 return key_senderror(so, m, ENOENT); 5326 } 5327 #else 5328 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 5329 ipseclog((LOG_DEBUG, 5330 "key_update: no such a SA found (spi:%u)\n", 5331 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5332 return key_senderror(so, m, EINVAL); 5333 } 5334 #endif 5335 5336 /* validity check */ 5337 if (sav->sah->saidx.proto != proto) { 5338 ipseclog((LOG_DEBUG, 5339 "key_update: protocol mismatched (DB=%u param=%u)\n", 5340 sav->sah->saidx.proto, proto)); 5341 return key_senderror(so, m, EINVAL); 5342 } 5343 #ifdef IPSEC_DOSEQCHECK 5344 if (sav->spi != sa0->sadb_sa_spi) { 5345 ipseclog((LOG_DEBUG, 5346 "key_update: SPI mismatched (DB:%u param:%u)\n", 5347 (u_int32_t)ntohl(sav->spi), 5348 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5349 return key_senderror(so, m, EINVAL); 5350 } 5351 #endif 5352 if (sav->pid != mhp->msg->sadb_msg_pid) { 5353 ipseclog((LOG_DEBUG, 5354 "key_update: pid mismatched (DB:%u param:%u)\n", 5355 sav->pid, mhp->msg->sadb_msg_pid)); 5356 return key_senderror(so, m, EINVAL); 5357 } 5358 5359 /* copy sav values */ 5360 error = key_setsaval(sav, m, mhp); 5361 if (error) { 5362 KEY_FREESAV(&sav); 5363 return key_senderror(so, m, error); 5364 } 5365 5366 if ((error = key_handle_natt_info(sav,mhp)) != 0) 5367 return key_senderror(so, m, EINVAL); 5368 5369 /* check SA values to be mature. */ 5370 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5371 KEY_FREESAV(&sav); 5372 return key_senderror(so, m, 0); 5373 } 5374 5375 { 5376 struct mbuf *n; 5377 5378 /* set msg buf from mhp */ 5379 n = key_getmsgbuf_x1(m, mhp); 5380 if (n == NULL) { 5381 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5382 return key_senderror(so, m, ENOBUFS); 5383 } 5384 5385 m_freem(m); 5386 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5387 } 5388 } 5389 5390 /* 5391 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5392 * only called by key_update(). 5393 * OUT: 5394 * NULL : not found 5395 * others : found, pointer to a SA. 5396 */ 5397 #ifdef IPSEC_DOSEQCHECK 5398 static struct secasvar * 5399 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5400 { 5401 struct secasvar *sav; 5402 u_int state; 5403 5404 state = SADB_SASTATE_LARVAL; 5405 5406 /* search SAD with sequence number ? */ 5407 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5408 5409 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5410 5411 if (sav->seq == seq) { 5412 SA_ADDREF(sav); 5413 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5414 "DP cause refcnt++:%d SA:%p\n", 5415 sav->refcnt, sav); 5416 return sav; 5417 } 5418 } 5419 5420 return NULL; 5421 } 5422 #endif 5423 5424 /* 5425 * SADB_ADD processing 5426 * add an entry to SA database, when received 5427 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5428 * key(AE), (identity(SD),) (sensitivity)> 5429 * from the ikmpd, 5430 * and send 5431 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5432 * (identity(SD),) (sensitivity)> 5433 * to the ikmpd. 5434 * 5435 * IGNORE identity and sensitivity messages. 5436 * 5437 * m will always be freed. 5438 */ 5439 static int 5440 key_add(struct socket *so, struct mbuf *m, 5441 const struct sadb_msghdr *mhp) 5442 { 5443 struct sadb_sa *sa0; 5444 struct sadb_address *src0, *dst0; 5445 struct secasindex saidx; 5446 struct secashead *newsah; 5447 struct secasvar *newsav; 5448 u_int16_t proto; 5449 u_int8_t mode; 5450 u_int16_t reqid; 5451 int error; 5452 5453 KASSERT(so != NULL); 5454 KASSERT(m != NULL); 5455 KASSERT(mhp != NULL); 5456 KASSERT(mhp->msg != NULL); 5457 5458 /* map satype to proto */ 5459 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5460 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5461 return key_senderror(so, m, EINVAL); 5462 } 5463 5464 if (mhp->ext[SADB_EXT_SA] == NULL || 5465 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5466 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5467 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5468 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5469 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5470 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5471 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5472 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5473 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5474 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5475 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5476 return key_senderror(so, m, EINVAL); 5477 } 5478 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5479 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5480 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5481 /* XXX need more */ 5482 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5483 return key_senderror(so, m, EINVAL); 5484 } 5485 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5486 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5487 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5488 } else { 5489 mode = IPSEC_MODE_ANY; 5490 reqid = 0; 5491 } 5492 5493 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5494 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5495 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5496 5497 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5498 dst0 + 1, &saidx)) != 0) 5499 return key_senderror(so, m, EINVAL); 5500 5501 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5502 return key_senderror(so, m, EINVAL); 5503 5504 /* get a SA header */ 5505 if ((newsah = key_getsah(&saidx)) == NULL) { 5506 /* create a new SA header */ 5507 if ((newsah = key_newsah(&saidx)) == NULL) { 5508 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5509 return key_senderror(so, m, ENOBUFS); 5510 } 5511 } 5512 5513 /* set spidx if there */ 5514 /* XXX rewrite */ 5515 error = key_setident(newsah, m, mhp); 5516 if (error) { 5517 return key_senderror(so, m, error); 5518 } 5519 5520 /* create new SA entry. */ 5521 /* We can create new SA only if SPI is differenct. */ 5522 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5523 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5524 return key_senderror(so, m, EEXIST); 5525 } 5526 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5527 if (newsav == NULL) { 5528 return key_senderror(so, m, error); 5529 } 5530 5531 if ((error = key_handle_natt_info(newsav, mhp)) != 0) 5532 return key_senderror(so, m, EINVAL); 5533 5534 /* check SA values to be mature. */ 5535 if ((error = key_mature(newsav)) != 0) { 5536 KEY_FREESAV(&newsav); 5537 return key_senderror(so, m, error); 5538 } 5539 5540 /* 5541 * don't call key_freesav() here, as we would like to keep the SA 5542 * in the database on success. 5543 */ 5544 5545 { 5546 struct mbuf *n; 5547 5548 /* set msg buf from mhp */ 5549 n = key_getmsgbuf_x1(m, mhp); 5550 if (n == NULL) { 5551 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5552 return key_senderror(so, m, ENOBUFS); 5553 } 5554 5555 m_freem(m); 5556 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5557 } 5558 } 5559 5560 /* m is retained */ 5561 static int 5562 key_setident(struct secashead *sah, struct mbuf *m, 5563 const struct sadb_msghdr *mhp) 5564 { 5565 const struct sadb_ident *idsrc, *iddst; 5566 int idsrclen, iddstlen; 5567 5568 KASSERT(sah != NULL); 5569 KASSERT(m != NULL); 5570 KASSERT(mhp != NULL); 5571 KASSERT(mhp->msg != NULL); 5572 5573 /* don't make buffer if not there */ 5574 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5575 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5576 sah->idents = NULL; 5577 sah->identd = NULL; 5578 return 0; 5579 } 5580 5581 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5582 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5583 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5584 return EINVAL; 5585 } 5586 5587 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5588 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5589 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5590 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5591 5592 /* validity check */ 5593 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5594 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5595 return EINVAL; 5596 } 5597 5598 switch (idsrc->sadb_ident_type) { 5599 case SADB_IDENTTYPE_PREFIX: 5600 case SADB_IDENTTYPE_FQDN: 5601 case SADB_IDENTTYPE_USERFQDN: 5602 default: 5603 /* XXX do nothing */ 5604 sah->idents = NULL; 5605 sah->identd = NULL; 5606 return 0; 5607 } 5608 5609 /* make structure */ 5610 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5611 if (sah->idents == NULL) { 5612 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5613 return ENOBUFS; 5614 } 5615 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5616 if (sah->identd == NULL) { 5617 KFREE(sah->idents); 5618 sah->idents = NULL; 5619 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5620 return ENOBUFS; 5621 } 5622 memcpy(sah->idents, idsrc, idsrclen); 5623 memcpy(sah->identd, iddst, iddstlen); 5624 5625 return 0; 5626 } 5627 5628 /* 5629 * m will not be freed on return. 5630 * it is caller's responsibility to free the result. 5631 */ 5632 static struct mbuf * 5633 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5634 { 5635 struct mbuf *n; 5636 5637 KASSERT(m != NULL); 5638 KASSERT(mhp != NULL); 5639 KASSERT(mhp->msg != NULL); 5640 5641 /* create new sadb_msg to reply. */ 5642 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5643 SADB_EXT_SA, SADB_X_EXT_SA2, 5644 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5645 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5646 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5647 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5648 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5649 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5650 if (!n) 5651 return NULL; 5652 5653 if (n->m_len < sizeof(struct sadb_msg)) { 5654 n = m_pullup(n, sizeof(struct sadb_msg)); 5655 if (n == NULL) 5656 return NULL; 5657 } 5658 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5659 mtod(n, struct sadb_msg *)->sadb_msg_len = 5660 PFKEY_UNIT64(n->m_pkthdr.len); 5661 5662 return n; 5663 } 5664 5665 static int key_delete_all (struct socket *, struct mbuf *, 5666 const struct sadb_msghdr *, u_int16_t); 5667 5668 /* 5669 * SADB_DELETE processing 5670 * receive 5671 * <base, SA(*), address(SD)> 5672 * from the ikmpd, and set SADB_SASTATE_DEAD, 5673 * and send, 5674 * <base, SA(*), address(SD)> 5675 * to the ikmpd. 5676 * 5677 * m will always be freed. 5678 */ 5679 static int 5680 key_delete(struct socket *so, struct mbuf *m, 5681 const struct sadb_msghdr *mhp) 5682 { 5683 struct sadb_sa *sa0; 5684 struct sadb_address *src0, *dst0; 5685 struct secasindex saidx; 5686 struct secashead *sah; 5687 struct secasvar *sav = NULL; 5688 u_int16_t proto; 5689 int error; 5690 5691 KASSERT(so != NULL); 5692 KASSERT(m != NULL); 5693 KASSERT(mhp != NULL); 5694 KASSERT(mhp->msg != NULL); 5695 5696 /* map satype to proto */ 5697 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5698 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5699 return key_senderror(so, m, EINVAL); 5700 } 5701 5702 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5703 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5704 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5705 return key_senderror(so, m, EINVAL); 5706 } 5707 5708 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5709 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5710 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5711 return key_senderror(so, m, EINVAL); 5712 } 5713 5714 if (mhp->ext[SADB_EXT_SA] == NULL) { 5715 /* 5716 * Caller wants us to delete all non-LARVAL SAs 5717 * that match the src/dst. This is used during 5718 * IKE INITIAL-CONTACT. 5719 */ 5720 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5721 return key_delete_all(so, m, mhp, proto); 5722 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5723 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5724 return key_senderror(so, m, EINVAL); 5725 } 5726 5727 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5728 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5729 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5730 5731 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5732 dst0 + 1, &saidx)) != 0) 5733 return key_senderror(so, m, EINVAL); 5734 5735 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5736 return key_senderror(so, m, EINVAL); 5737 5738 /* get a SA header */ 5739 LIST_FOREACH(sah, &sahtree, chain) { 5740 if (sah->state == SADB_SASTATE_DEAD) 5741 continue; 5742 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5743 continue; 5744 5745 /* get a SA with SPI. */ 5746 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5747 if (sav) 5748 break; 5749 } 5750 if (sah == NULL) { 5751 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5752 return key_senderror(so, m, ENOENT); 5753 } 5754 5755 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5756 KEY_FREESAV(&sav); 5757 5758 { 5759 struct mbuf *n; 5760 struct sadb_msg *newmsg; 5761 5762 /* create new sadb_msg to reply. */ 5763 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5764 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5765 if (!n) 5766 return key_senderror(so, m, ENOBUFS); 5767 5768 if (n->m_len < sizeof(struct sadb_msg)) { 5769 n = m_pullup(n, sizeof(struct sadb_msg)); 5770 if (n == NULL) 5771 return key_senderror(so, m, ENOBUFS); 5772 } 5773 newmsg = mtod(n, struct sadb_msg *); 5774 newmsg->sadb_msg_errno = 0; 5775 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5776 5777 m_freem(m); 5778 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5779 } 5780 } 5781 5782 /* 5783 * delete all SAs for src/dst. Called from key_delete(). 5784 */ 5785 static int 5786 key_delete_all(struct socket *so, struct mbuf *m, 5787 const struct sadb_msghdr *mhp, u_int16_t proto) 5788 { 5789 struct sadb_address *src0, *dst0; 5790 struct secasindex saidx; 5791 struct secashead *sah; 5792 struct secasvar *sav, *nextsav; 5793 u_int state; 5794 int error; 5795 5796 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5797 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5798 5799 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5800 dst0 + 1, &saidx)) != 0) 5801 return key_senderror(so, m, EINVAL); 5802 5803 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5804 return key_senderror(so, m, EINVAL); 5805 5806 LIST_FOREACH(sah, &sahtree, chain) { 5807 if (sah->state == SADB_SASTATE_DEAD) 5808 continue; 5809 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5810 continue; 5811 5812 /* Delete all non-LARVAL SAs. */ 5813 SASTATE_ALIVE_FOREACH(state) { 5814 if (state == SADB_SASTATE_LARVAL) 5815 continue; 5816 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 5817 nextsav) { 5818 /* sanity check */ 5819 if (sav->state != state) { 5820 ipseclog((LOG_DEBUG, "key_delete_all: " 5821 "invalid sav->state " 5822 "(queue: %d SA: %d)\n", 5823 state, sav->state)); 5824 continue; 5825 } 5826 5827 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5828 KEY_FREESAV(&sav); 5829 } 5830 } 5831 } 5832 { 5833 struct mbuf *n; 5834 struct sadb_msg *newmsg; 5835 5836 /* create new sadb_msg to reply. */ 5837 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5838 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5839 if (!n) 5840 return key_senderror(so, m, ENOBUFS); 5841 5842 if (n->m_len < sizeof(struct sadb_msg)) { 5843 n = m_pullup(n, sizeof(struct sadb_msg)); 5844 if (n == NULL) 5845 return key_senderror(so, m, ENOBUFS); 5846 } 5847 newmsg = mtod(n, struct sadb_msg *); 5848 newmsg->sadb_msg_errno = 0; 5849 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5850 5851 m_freem(m); 5852 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5853 } 5854 } 5855 5856 /* 5857 * SADB_GET processing 5858 * receive 5859 * <base, SA(*), address(SD)> 5860 * from the ikmpd, and get a SP and a SA to respond, 5861 * and send, 5862 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5863 * (identity(SD),) (sensitivity)> 5864 * to the ikmpd. 5865 * 5866 * m will always be freed. 5867 */ 5868 static int 5869 key_get(struct socket *so, struct mbuf *m, 5870 const struct sadb_msghdr *mhp) 5871 { 5872 struct sadb_sa *sa0; 5873 struct sadb_address *src0, *dst0; 5874 struct secasindex saidx; 5875 struct secashead *sah; 5876 struct secasvar *sav = NULL; 5877 u_int16_t proto; 5878 int error; 5879 5880 KASSERT(so != NULL); 5881 KASSERT(m != NULL); 5882 KASSERT(mhp != NULL); 5883 KASSERT(mhp->msg != NULL); 5884 5885 /* map satype to proto */ 5886 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5887 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5888 return key_senderror(so, m, EINVAL); 5889 } 5890 5891 if (mhp->ext[SADB_EXT_SA] == NULL || 5892 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5893 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5894 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5895 return key_senderror(so, m, EINVAL); 5896 } 5897 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5898 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5899 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5900 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5901 return key_senderror(so, m, EINVAL); 5902 } 5903 5904 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5905 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5906 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5907 5908 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5909 dst0 + 1, &saidx)) != 0) 5910 return key_senderror(so, m, EINVAL); 5911 5912 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5913 return key_senderror(so, m, EINVAL); 5914 5915 /* get a SA header */ 5916 LIST_FOREACH(sah, &sahtree, chain) { 5917 if (sah->state == SADB_SASTATE_DEAD) 5918 continue; 5919 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5920 continue; 5921 5922 /* get a SA with SPI. */ 5923 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5924 if (sav) 5925 break; 5926 } 5927 if (sah == NULL) { 5928 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5929 return key_senderror(so, m, ENOENT); 5930 } 5931 5932 { 5933 struct mbuf *n; 5934 u_int8_t satype; 5935 5936 /* map proto to satype */ 5937 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5938 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5939 return key_senderror(so, m, EINVAL); 5940 } 5941 5942 /* create new sadb_msg to reply. */ 5943 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5944 mhp->msg->sadb_msg_pid); 5945 if (!n) 5946 return key_senderror(so, m, ENOBUFS); 5947 5948 m_freem(m); 5949 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5950 } 5951 } 5952 5953 /* XXX make it sysctl-configurable? */ 5954 static void 5955 key_getcomb_setlifetime(struct sadb_comb *comb) 5956 { 5957 5958 comb->sadb_comb_soft_allocations = 1; 5959 comb->sadb_comb_hard_allocations = 1; 5960 comb->sadb_comb_soft_bytes = 0; 5961 comb->sadb_comb_hard_bytes = 0; 5962 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5963 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5964 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5965 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5966 } 5967 5968 /* 5969 * XXX reorder combinations by preference 5970 * XXX no idea if the user wants ESP authentication or not 5971 */ 5972 static struct mbuf * 5973 key_getcomb_esp(void) 5974 { 5975 struct sadb_comb *comb; 5976 const struct enc_xform *algo; 5977 struct mbuf *result = NULL, *m, *n; 5978 int encmin; 5979 int i, off, o; 5980 int totlen; 5981 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5982 5983 m = NULL; 5984 for (i = 1; i <= SADB_EALG_MAX; i++) { 5985 algo = esp_algorithm_lookup(i); 5986 if (algo == NULL) 5987 continue; 5988 5989 /* discard algorithms with key size smaller than system min */ 5990 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5991 continue; 5992 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5993 encmin = ipsec_esp_keymin; 5994 else 5995 encmin = _BITS(algo->minkey); 5996 5997 if (ipsec_esp_auth) 5998 m = key_getcomb_ah(); 5999 else { 6000 KASSERTMSG(l <= MLEN, 6001 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6002 MGET(m, M_DONTWAIT, MT_DATA); 6003 if (m) { 6004 M_ALIGN(m, l); 6005 m->m_len = l; 6006 m->m_next = NULL; 6007 memset(mtod(m, void *), 0, m->m_len); 6008 } 6009 } 6010 if (!m) 6011 goto fail; 6012 6013 totlen = 0; 6014 for (n = m; n; n = n->m_next) 6015 totlen += n->m_len; 6016 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 6017 6018 for (off = 0; off < totlen; off += l) { 6019 n = m_pulldown(m, off, l, &o); 6020 if (!n) { 6021 /* m is already freed */ 6022 goto fail; 6023 } 6024 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6025 memset(comb, 0, sizeof(*comb)); 6026 key_getcomb_setlifetime(comb); 6027 comb->sadb_comb_encrypt = i; 6028 comb->sadb_comb_encrypt_minbits = encmin; 6029 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6030 } 6031 6032 if (!result) 6033 result = m; 6034 else 6035 m_cat(result, m); 6036 } 6037 6038 return result; 6039 6040 fail: 6041 if (result) 6042 m_freem(result); 6043 return NULL; 6044 } 6045 6046 static void 6047 key_getsizes_ah(const struct auth_hash *ah, int alg, 6048 u_int16_t* ksmin, u_int16_t* ksmax) 6049 { 6050 *ksmin = *ksmax = ah->keysize; 6051 if (ah->keysize == 0) { 6052 /* 6053 * Transform takes arbitrary key size but algorithm 6054 * key size is restricted. Enforce this here. 6055 */ 6056 switch (alg) { 6057 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6058 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6059 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 6060 default: 6061 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 6062 alg)); 6063 break; 6064 } 6065 } 6066 } 6067 6068 /* 6069 * XXX reorder combinations by preference 6070 */ 6071 static struct mbuf * 6072 key_getcomb_ah(void) 6073 { 6074 struct sadb_comb *comb; 6075 const struct auth_hash *algo; 6076 struct mbuf *m; 6077 u_int16_t minkeysize, maxkeysize; 6078 int i; 6079 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6080 6081 m = NULL; 6082 for (i = 1; i <= SADB_AALG_MAX; i++) { 6083 #if 1 6084 /* we prefer HMAC algorithms, not old algorithms */ 6085 if (i != SADB_AALG_SHA1HMAC && 6086 i != SADB_AALG_MD5HMAC && 6087 i != SADB_X_AALG_SHA2_256 && 6088 i != SADB_X_AALG_SHA2_384 && 6089 i != SADB_X_AALG_SHA2_512) 6090 continue; 6091 #endif 6092 algo = ah_algorithm_lookup(i); 6093 if (!algo) 6094 continue; 6095 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6096 /* discard algorithms with key size smaller than system min */ 6097 if (_BITS(minkeysize) < ipsec_ah_keymin) 6098 continue; 6099 6100 if (!m) { 6101 KASSERTMSG(l <= MLEN, 6102 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6103 MGET(m, M_DONTWAIT, MT_DATA); 6104 if (m) { 6105 M_ALIGN(m, l); 6106 m->m_len = l; 6107 m->m_next = NULL; 6108 } 6109 } else 6110 M_PREPEND(m, l, M_DONTWAIT); 6111 if (!m) 6112 return NULL; 6113 6114 comb = mtod(m, struct sadb_comb *); 6115 memset(comb, 0, sizeof(*comb)); 6116 key_getcomb_setlifetime(comb); 6117 comb->sadb_comb_auth = i; 6118 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6119 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6120 } 6121 6122 return m; 6123 } 6124 6125 /* 6126 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6127 * XXX reorder combinations by preference 6128 */ 6129 static struct mbuf * 6130 key_getcomb_ipcomp(void) 6131 { 6132 struct sadb_comb *comb; 6133 const struct comp_algo *algo; 6134 struct mbuf *m; 6135 int i; 6136 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6137 6138 m = NULL; 6139 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6140 algo = ipcomp_algorithm_lookup(i); 6141 if (!algo) 6142 continue; 6143 6144 if (!m) { 6145 KASSERTMSG(l <= MLEN, 6146 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6147 MGET(m, M_DONTWAIT, MT_DATA); 6148 if (m) { 6149 M_ALIGN(m, l); 6150 m->m_len = l; 6151 m->m_next = NULL; 6152 } 6153 } else 6154 M_PREPEND(m, l, M_DONTWAIT); 6155 if (!m) 6156 return NULL; 6157 6158 comb = mtod(m, struct sadb_comb *); 6159 memset(comb, 0, sizeof(*comb)); 6160 key_getcomb_setlifetime(comb); 6161 comb->sadb_comb_encrypt = i; 6162 /* what should we set into sadb_comb_*_{min,max}bits? */ 6163 } 6164 6165 return m; 6166 } 6167 6168 /* 6169 * XXX no way to pass mode (transport/tunnel) to userland 6170 * XXX replay checking? 6171 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6172 */ 6173 static struct mbuf * 6174 key_getprop(const struct secasindex *saidx) 6175 { 6176 struct sadb_prop *prop; 6177 struct mbuf *m, *n; 6178 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6179 int totlen; 6180 6181 switch (saidx->proto) { 6182 case IPPROTO_ESP: 6183 m = key_getcomb_esp(); 6184 break; 6185 case IPPROTO_AH: 6186 m = key_getcomb_ah(); 6187 break; 6188 case IPPROTO_IPCOMP: 6189 m = key_getcomb_ipcomp(); 6190 break; 6191 default: 6192 return NULL; 6193 } 6194 6195 if (!m) 6196 return NULL; 6197 M_PREPEND(m, l, M_DONTWAIT); 6198 if (!m) 6199 return NULL; 6200 6201 totlen = 0; 6202 for (n = m; n; n = n->m_next) 6203 totlen += n->m_len; 6204 6205 prop = mtod(m, struct sadb_prop *); 6206 memset(prop, 0, sizeof(*prop)); 6207 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6208 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6209 prop->sadb_prop_replay = 32; /* XXX */ 6210 6211 return m; 6212 } 6213 6214 /* 6215 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6216 * send 6217 * <base, SA, address(SD), (address(P)), x_policy, 6218 * (identity(SD),) (sensitivity,) proposal> 6219 * to KMD, and expect to receive 6220 * <base> with SADB_ACQUIRE if error occurred, 6221 * or 6222 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6223 * from KMD by PF_KEY. 6224 * 6225 * XXX x_policy is outside of RFC2367 (KAME extension). 6226 * XXX sensitivity is not supported. 6227 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6228 * see comment for key_getcomb_ipcomp(). 6229 * 6230 * OUT: 6231 * 0 : succeed 6232 * others: error number 6233 */ 6234 static int 6235 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6236 { 6237 struct mbuf *result = NULL, *m; 6238 #ifndef IPSEC_NONBLOCK_ACQUIRE 6239 struct secacq *newacq; 6240 #endif 6241 u_int8_t satype; 6242 int error = -1; 6243 u_int32_t seq; 6244 6245 /* sanity check */ 6246 KASSERT(saidx != NULL); 6247 satype = key_proto2satype(saidx->proto); 6248 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6249 6250 #ifndef IPSEC_NONBLOCK_ACQUIRE 6251 /* 6252 * We never do anything about acquirng SA. There is anather 6253 * solution that kernel blocks to send SADB_ACQUIRE message until 6254 * getting something message from IKEd. In later case, to be 6255 * managed with ACQUIRING list. 6256 */ 6257 /* Get an entry to check whether sending message or not. */ 6258 if ((newacq = key_getacq(saidx)) != NULL) { 6259 if (key_blockacq_count < newacq->count) { 6260 /* reset counter and do send message. */ 6261 newacq->count = 0; 6262 } else { 6263 /* increment counter and do nothing. */ 6264 newacq->count++; 6265 return 0; 6266 } 6267 } else { 6268 /* make new entry for blocking to send SADB_ACQUIRE. */ 6269 if ((newacq = key_newacq(saidx)) == NULL) 6270 return ENOBUFS; 6271 6272 /* add to acqtree */ 6273 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6274 } 6275 #endif 6276 6277 6278 #ifndef IPSEC_NONBLOCK_ACQUIRE 6279 seq = newacq->seq; 6280 #else 6281 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6282 #endif 6283 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6284 if (!m) { 6285 error = ENOBUFS; 6286 goto fail; 6287 } 6288 result = m; 6289 6290 /* set sadb_address for saidx's. */ 6291 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6292 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6293 if (!m) { 6294 error = ENOBUFS; 6295 goto fail; 6296 } 6297 m_cat(result, m); 6298 6299 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6300 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6301 if (!m) { 6302 error = ENOBUFS; 6303 goto fail; 6304 } 6305 m_cat(result, m); 6306 6307 /* XXX proxy address (optional) */ 6308 6309 /* set sadb_x_policy */ 6310 if (sp) { 6311 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6312 if (!m) { 6313 error = ENOBUFS; 6314 goto fail; 6315 } 6316 m_cat(result, m); 6317 } 6318 6319 /* XXX identity (optional) */ 6320 #if 0 6321 if (idexttype && fqdn) { 6322 /* create identity extension (FQDN) */ 6323 struct sadb_ident *id; 6324 int fqdnlen; 6325 6326 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6327 id = (struct sadb_ident *)p; 6328 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6329 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6330 id->sadb_ident_exttype = idexttype; 6331 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6332 memcpy(id + 1, fqdn, fqdnlen); 6333 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6334 } 6335 6336 if (idexttype) { 6337 /* create identity extension (USERFQDN) */ 6338 struct sadb_ident *id; 6339 int userfqdnlen; 6340 6341 if (userfqdn) { 6342 /* +1 for terminating-NUL */ 6343 userfqdnlen = strlen(userfqdn) + 1; 6344 } else 6345 userfqdnlen = 0; 6346 id = (struct sadb_ident *)p; 6347 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6348 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6349 id->sadb_ident_exttype = idexttype; 6350 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6351 /* XXX is it correct? */ 6352 if (curlwp) 6353 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6354 if (userfqdn && userfqdnlen) 6355 memcpy(id + 1, userfqdn, userfqdnlen); 6356 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6357 } 6358 #endif 6359 6360 /* XXX sensitivity (optional) */ 6361 6362 /* create proposal/combination extension */ 6363 m = key_getprop(saidx); 6364 #if 0 6365 /* 6366 * spec conformant: always attach proposal/combination extension, 6367 * the problem is that we have no way to attach it for ipcomp, 6368 * due to the way sadb_comb is declared in RFC2367. 6369 */ 6370 if (!m) { 6371 error = ENOBUFS; 6372 goto fail; 6373 } 6374 m_cat(result, m); 6375 #else 6376 /* 6377 * outside of spec; make proposal/combination extension optional. 6378 */ 6379 if (m) 6380 m_cat(result, m); 6381 #endif 6382 6383 if ((result->m_flags & M_PKTHDR) == 0) { 6384 error = EINVAL; 6385 goto fail; 6386 } 6387 6388 if (result->m_len < sizeof(struct sadb_msg)) { 6389 result = m_pullup(result, sizeof(struct sadb_msg)); 6390 if (result == NULL) { 6391 error = ENOBUFS; 6392 goto fail; 6393 } 6394 } 6395 6396 result->m_pkthdr.len = 0; 6397 for (m = result; m; m = m->m_next) 6398 result->m_pkthdr.len += m->m_len; 6399 6400 mtod(result, struct sadb_msg *)->sadb_msg_len = 6401 PFKEY_UNIT64(result->m_pkthdr.len); 6402 6403 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6404 6405 fail: 6406 if (result) 6407 m_freem(result); 6408 return error; 6409 } 6410 6411 #ifndef IPSEC_NONBLOCK_ACQUIRE 6412 static struct secacq * 6413 key_newacq(const struct secasindex *saidx) 6414 { 6415 struct secacq *newacq; 6416 6417 /* get new entry */ 6418 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6419 if (newacq == NULL) { 6420 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6421 return NULL; 6422 } 6423 memset(newacq, 0, sizeof(*newacq)); 6424 6425 /* copy secindex */ 6426 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6427 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6428 newacq->created = time_uptime; 6429 newacq->count = 0; 6430 6431 return newacq; 6432 } 6433 6434 static struct secacq * 6435 key_getacq(const struct secasindex *saidx) 6436 { 6437 struct secacq *acq; 6438 6439 LIST_FOREACH(acq, &acqtree, chain) { 6440 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6441 return acq; 6442 } 6443 6444 return NULL; 6445 } 6446 6447 static struct secacq * 6448 key_getacqbyseq(u_int32_t seq) 6449 { 6450 struct secacq *acq; 6451 6452 LIST_FOREACH(acq, &acqtree, chain) { 6453 if (acq->seq == seq) 6454 return acq; 6455 } 6456 6457 return NULL; 6458 } 6459 #endif 6460 6461 static struct secspacq * 6462 key_newspacq(const struct secpolicyindex *spidx) 6463 { 6464 struct secspacq *acq; 6465 6466 /* get new entry */ 6467 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6468 if (acq == NULL) { 6469 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6470 return NULL; 6471 } 6472 memset(acq, 0, sizeof(*acq)); 6473 6474 /* copy secindex */ 6475 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6476 acq->created = time_uptime; 6477 acq->count = 0; 6478 6479 return acq; 6480 } 6481 6482 static struct secspacq * 6483 key_getspacq(const struct secpolicyindex *spidx) 6484 { 6485 struct secspacq *acq; 6486 6487 LIST_FOREACH(acq, &spacqtree, chain) { 6488 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6489 return acq; 6490 } 6491 6492 return NULL; 6493 } 6494 6495 /* 6496 * SADB_ACQUIRE processing, 6497 * in first situation, is receiving 6498 * <base> 6499 * from the ikmpd, and clear sequence of its secasvar entry. 6500 * 6501 * In second situation, is receiving 6502 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6503 * from a user land process, and return 6504 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6505 * to the socket. 6506 * 6507 * m will always be freed. 6508 */ 6509 static int 6510 key_acquire2(struct socket *so, struct mbuf *m, 6511 const struct sadb_msghdr *mhp) 6512 { 6513 const struct sadb_address *src0, *dst0; 6514 struct secasindex saidx; 6515 struct secashead *sah; 6516 u_int16_t proto; 6517 int error; 6518 6519 KASSERT(so != NULL); 6520 KASSERT(m != NULL); 6521 KASSERT(mhp != NULL); 6522 KASSERT(mhp->msg != NULL); 6523 6524 /* 6525 * Error message from KMd. 6526 * We assume that if error was occurred in IKEd, the length of PFKEY 6527 * message is equal to the size of sadb_msg structure. 6528 * We do not raise error even if error occurred in this function. 6529 */ 6530 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6531 #ifndef IPSEC_NONBLOCK_ACQUIRE 6532 struct secacq *acq; 6533 6534 /* check sequence number */ 6535 if (mhp->msg->sadb_msg_seq == 0) { 6536 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6537 m_freem(m); 6538 return 0; 6539 } 6540 6541 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6542 /* 6543 * the specified larval SA is already gone, or we got 6544 * a bogus sequence number. we can silently ignore it. 6545 */ 6546 m_freem(m); 6547 return 0; 6548 } 6549 6550 /* reset acq counter in order to deletion by timehander. */ 6551 acq->created = time_uptime; 6552 acq->count = 0; 6553 #endif 6554 m_freem(m); 6555 return 0; 6556 } 6557 6558 /* 6559 * This message is from user land. 6560 */ 6561 6562 /* map satype to proto */ 6563 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6564 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6565 return key_senderror(so, m, EINVAL); 6566 } 6567 6568 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6569 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6570 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6571 /* error */ 6572 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6573 return key_senderror(so, m, EINVAL); 6574 } 6575 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6576 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6577 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6578 /* error */ 6579 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6580 return key_senderror(so, m, EINVAL); 6581 } 6582 6583 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6584 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6585 6586 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 6587 dst0 + 1, &saidx)) != 0) 6588 return key_senderror(so, m, EINVAL); 6589 6590 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 6591 return key_senderror(so, m, EINVAL); 6592 6593 /* get a SA index */ 6594 LIST_FOREACH(sah, &sahtree, chain) { 6595 if (sah->state == SADB_SASTATE_DEAD) 6596 continue; 6597 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6598 break; 6599 } 6600 if (sah != NULL) { 6601 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6602 return key_senderror(so, m, EEXIST); 6603 } 6604 6605 error = key_acquire(&saidx, NULL); 6606 if (error != 0) { 6607 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6608 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6609 return key_senderror(so, m, error); 6610 } 6611 6612 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6613 } 6614 6615 /* 6616 * SADB_REGISTER processing. 6617 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6618 * receive 6619 * <base> 6620 * from the ikmpd, and register a socket to send PF_KEY messages, 6621 * and send 6622 * <base, supported> 6623 * to KMD by PF_KEY. 6624 * If socket is detached, must free from regnode. 6625 * 6626 * m will always be freed. 6627 */ 6628 static int 6629 key_register(struct socket *so, struct mbuf *m, 6630 const struct sadb_msghdr *mhp) 6631 { 6632 struct secreg *reg, *newreg = 0; 6633 6634 KASSERT(so != NULL); 6635 KASSERT(m != NULL); 6636 KASSERT(mhp != NULL); 6637 KASSERT(mhp->msg != NULL); 6638 6639 /* check for invalid register message */ 6640 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6641 return key_senderror(so, m, EINVAL); 6642 6643 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6644 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6645 goto setmsg; 6646 6647 /* check whether existing or not */ 6648 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6649 if (reg->so == so) { 6650 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6651 return key_senderror(so, m, EEXIST); 6652 } 6653 } 6654 6655 /* create regnode */ 6656 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6657 if (newreg == NULL) { 6658 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6659 return key_senderror(so, m, ENOBUFS); 6660 } 6661 memset(newreg, 0, sizeof(*newreg)); 6662 6663 newreg->so = so; 6664 ((struct keycb *)sotorawcb(so))->kp_registered++; 6665 6666 /* add regnode to regtree. */ 6667 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6668 6669 setmsg: 6670 { 6671 struct mbuf *n; 6672 struct sadb_msg *newmsg; 6673 struct sadb_supported *sup; 6674 u_int len, alen, elen; 6675 int off; 6676 int i; 6677 struct sadb_alg *alg; 6678 6679 /* create new sadb_msg to reply. */ 6680 alen = 0; 6681 for (i = 1; i <= SADB_AALG_MAX; i++) { 6682 if (ah_algorithm_lookup(i)) 6683 alen += sizeof(struct sadb_alg); 6684 } 6685 if (alen) 6686 alen += sizeof(struct sadb_supported); 6687 elen = 0; 6688 for (i = 1; i <= SADB_EALG_MAX; i++) { 6689 if (esp_algorithm_lookup(i)) 6690 elen += sizeof(struct sadb_alg); 6691 } 6692 if (elen) 6693 elen += sizeof(struct sadb_supported); 6694 6695 len = sizeof(struct sadb_msg) + alen + elen; 6696 6697 if (len > MCLBYTES) 6698 return key_senderror(so, m, ENOBUFS); 6699 6700 MGETHDR(n, M_DONTWAIT, MT_DATA); 6701 if (len > MHLEN) { 6702 MCLGET(n, M_DONTWAIT); 6703 if ((n->m_flags & M_EXT) == 0) { 6704 m_freem(n); 6705 n = NULL; 6706 } 6707 } 6708 if (!n) 6709 return key_senderror(so, m, ENOBUFS); 6710 6711 n->m_pkthdr.len = n->m_len = len; 6712 n->m_next = NULL; 6713 off = 0; 6714 6715 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6716 newmsg = mtod(n, struct sadb_msg *); 6717 newmsg->sadb_msg_errno = 0; 6718 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6719 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6720 6721 /* for authentication algorithm */ 6722 if (alen) { 6723 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6724 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6725 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6726 off += PFKEY_ALIGN8(sizeof(*sup)); 6727 6728 for (i = 1; i <= SADB_AALG_MAX; i++) { 6729 const struct auth_hash *aalgo; 6730 u_int16_t minkeysize, maxkeysize; 6731 6732 aalgo = ah_algorithm_lookup(i); 6733 if (!aalgo) 6734 continue; 6735 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6736 alg->sadb_alg_id = i; 6737 alg->sadb_alg_ivlen = 0; 6738 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6739 alg->sadb_alg_minbits = _BITS(minkeysize); 6740 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6741 off += PFKEY_ALIGN8(sizeof(*alg)); 6742 } 6743 } 6744 6745 /* for encryption algorithm */ 6746 if (elen) { 6747 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6748 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6749 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6750 off += PFKEY_ALIGN8(sizeof(*sup)); 6751 6752 for (i = 1; i <= SADB_EALG_MAX; i++) { 6753 const struct enc_xform *ealgo; 6754 6755 ealgo = esp_algorithm_lookup(i); 6756 if (!ealgo) 6757 continue; 6758 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6759 alg->sadb_alg_id = i; 6760 alg->sadb_alg_ivlen = ealgo->blocksize; 6761 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6762 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6763 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6764 } 6765 } 6766 6767 KASSERTMSG(off == len, "length inconsistency"); 6768 6769 m_freem(m); 6770 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6771 } 6772 } 6773 6774 /* 6775 * free secreg entry registered. 6776 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6777 */ 6778 void 6779 key_freereg(struct socket *so) 6780 { 6781 struct secreg *reg; 6782 int i; 6783 6784 KASSERT(so != NULL); 6785 6786 /* 6787 * check whether existing or not. 6788 * check all type of SA, because there is a potential that 6789 * one socket is registered to multiple type of SA. 6790 */ 6791 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6792 LIST_FOREACH(reg, ®tree[i], chain) { 6793 if (reg->so == so 6794 && __LIST_CHAINED(reg)) { 6795 LIST_REMOVE(reg, chain); 6796 KFREE(reg); 6797 break; 6798 } 6799 } 6800 } 6801 6802 return; 6803 } 6804 6805 /* 6806 * SADB_EXPIRE processing 6807 * send 6808 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6809 * to KMD by PF_KEY. 6810 * NOTE: We send only soft lifetime extension. 6811 * 6812 * OUT: 0 : succeed 6813 * others : error number 6814 */ 6815 static int 6816 key_expire(struct secasvar *sav) 6817 { 6818 int s; 6819 int satype; 6820 struct mbuf *result = NULL, *m; 6821 int len; 6822 int error = -1; 6823 struct sadb_lifetime *lt; 6824 6825 /* XXX: Why do we lock ? */ 6826 s = splsoftnet(); /*called from softclock()*/ 6827 6828 KASSERT(sav != NULL); 6829 KASSERT(sav->sah != NULL); 6830 6831 satype = key_proto2satype(sav->sah->saidx.proto); 6832 KASSERTMSG(satype != 0, "invalid proto is passed"); 6833 6834 /* set msg header */ 6835 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6836 if (!m) { 6837 error = ENOBUFS; 6838 goto fail; 6839 } 6840 result = m; 6841 6842 /* create SA extension */ 6843 m = key_setsadbsa(sav); 6844 if (!m) { 6845 error = ENOBUFS; 6846 goto fail; 6847 } 6848 m_cat(result, m); 6849 6850 /* create SA extension */ 6851 m = key_setsadbxsa2(sav->sah->saidx.mode, 6852 sav->replay ? sav->replay->count : 0, 6853 sav->sah->saidx.reqid); 6854 if (!m) { 6855 error = ENOBUFS; 6856 goto fail; 6857 } 6858 m_cat(result, m); 6859 6860 /* create lifetime extension (current and soft) */ 6861 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6862 m = key_alloc_mbuf(len); 6863 if (!m || m->m_next) { /*XXX*/ 6864 if (m) 6865 m_freem(m); 6866 error = ENOBUFS; 6867 goto fail; 6868 } 6869 memset(mtod(m, void *), 0, len); 6870 lt = mtod(m, struct sadb_lifetime *); 6871 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6872 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6873 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6874 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6875 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime 6876 + time_second - time_uptime; 6877 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime 6878 + time_second - time_uptime; 6879 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6880 memcpy(lt, sav->lft_s, sizeof(*lt)); 6881 m_cat(result, m); 6882 6883 /* set sadb_address for source */ 6884 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6885 &sav->sah->saidx.src.sa, 6886 FULLMASK, IPSEC_ULPROTO_ANY); 6887 if (!m) { 6888 error = ENOBUFS; 6889 goto fail; 6890 } 6891 m_cat(result, m); 6892 6893 /* set sadb_address for destination */ 6894 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6895 &sav->sah->saidx.dst.sa, 6896 FULLMASK, IPSEC_ULPROTO_ANY); 6897 if (!m) { 6898 error = ENOBUFS; 6899 goto fail; 6900 } 6901 m_cat(result, m); 6902 6903 if ((result->m_flags & M_PKTHDR) == 0) { 6904 error = EINVAL; 6905 goto fail; 6906 } 6907 6908 if (result->m_len < sizeof(struct sadb_msg)) { 6909 result = m_pullup(result, sizeof(struct sadb_msg)); 6910 if (result == NULL) { 6911 error = ENOBUFS; 6912 goto fail; 6913 } 6914 } 6915 6916 result->m_pkthdr.len = 0; 6917 for (m = result; m; m = m->m_next) 6918 result->m_pkthdr.len += m->m_len; 6919 6920 mtod(result, struct sadb_msg *)->sadb_msg_len = 6921 PFKEY_UNIT64(result->m_pkthdr.len); 6922 6923 splx(s); 6924 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6925 6926 fail: 6927 if (result) 6928 m_freem(result); 6929 splx(s); 6930 return error; 6931 } 6932 6933 /* 6934 * SADB_FLUSH processing 6935 * receive 6936 * <base> 6937 * from the ikmpd, and free all entries in secastree. 6938 * and send, 6939 * <base> 6940 * to the ikmpd. 6941 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6942 * 6943 * m will always be freed. 6944 */ 6945 static int 6946 key_flush(struct socket *so, struct mbuf *m, 6947 const struct sadb_msghdr *mhp) 6948 { 6949 struct sadb_msg *newmsg; 6950 struct secashead *sah; 6951 struct secasvar *sav, *nextsav; 6952 u_int16_t proto; 6953 u_int8_t state; 6954 6955 KASSERT(so != NULL); 6956 KASSERT(mhp != NULL); 6957 KASSERT(mhp->msg != NULL); 6958 6959 /* map satype to proto */ 6960 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6961 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6962 return key_senderror(so, m, EINVAL); 6963 } 6964 6965 /* no SATYPE specified, i.e. flushing all SA. */ 6966 LIST_FOREACH(sah, &sahtree, chain) { 6967 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6968 && proto != sah->saidx.proto) 6969 continue; 6970 6971 SASTATE_ALIVE_FOREACH(state) { 6972 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 6973 nextsav) { 6974 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6975 KEY_FREESAV(&sav); 6976 } 6977 } 6978 6979 sah->state = SADB_SASTATE_DEAD; 6980 } 6981 6982 if (m->m_len < sizeof(struct sadb_msg) || 6983 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6984 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 6985 return key_senderror(so, m, ENOBUFS); 6986 } 6987 6988 if (m->m_next) 6989 m_freem(m->m_next); 6990 m->m_next = NULL; 6991 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6992 newmsg = mtod(m, struct sadb_msg *); 6993 newmsg->sadb_msg_errno = 0; 6994 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6995 6996 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6997 } 6998 6999 7000 static struct mbuf * 7001 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 7002 { 7003 struct secashead *sah; 7004 struct secasvar *sav; 7005 u_int16_t proto; 7006 u_int8_t satype; 7007 u_int8_t state; 7008 int cnt; 7009 struct mbuf *m, *n, *prev; 7010 7011 *lenp = 0; 7012 7013 /* map satype to proto */ 7014 if ((proto = key_satype2proto(req_satype)) == 0) { 7015 *errorp = EINVAL; 7016 return (NULL); 7017 } 7018 7019 /* count sav entries to be sent to userland. */ 7020 cnt = 0; 7021 LIST_FOREACH(sah, &sahtree, chain) { 7022 if (req_satype != SADB_SATYPE_UNSPEC && 7023 proto != sah->saidx.proto) 7024 continue; 7025 7026 SASTATE_ANY_FOREACH(state) { 7027 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7028 cnt++; 7029 } 7030 } 7031 } 7032 7033 if (cnt == 0) { 7034 *errorp = ENOENT; 7035 return (NULL); 7036 } 7037 7038 /* send this to the userland, one at a time. */ 7039 m = NULL; 7040 prev = m; 7041 LIST_FOREACH(sah, &sahtree, chain) { 7042 if (req_satype != SADB_SATYPE_UNSPEC && 7043 proto != sah->saidx.proto) 7044 continue; 7045 7046 /* map proto to satype */ 7047 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7048 m_freem(m); 7049 *errorp = EINVAL; 7050 return (NULL); 7051 } 7052 7053 SASTATE_ANY_FOREACH(state) { 7054 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7055 n = key_setdumpsa(sav, SADB_DUMP, satype, 7056 --cnt, pid); 7057 if (!n) { 7058 m_freem(m); 7059 *errorp = ENOBUFS; 7060 return (NULL); 7061 } 7062 7063 if (!m) 7064 m = n; 7065 else 7066 prev->m_nextpkt = n; 7067 prev = n; 7068 } 7069 } 7070 } 7071 7072 if (!m) { 7073 *errorp = EINVAL; 7074 return (NULL); 7075 } 7076 7077 if ((m->m_flags & M_PKTHDR) != 0) { 7078 m->m_pkthdr.len = 0; 7079 for (n = m; n; n = n->m_next) 7080 m->m_pkthdr.len += n->m_len; 7081 } 7082 7083 *errorp = 0; 7084 return (m); 7085 } 7086 7087 /* 7088 * SADB_DUMP processing 7089 * dump all entries including status of DEAD in SAD. 7090 * receive 7091 * <base> 7092 * from the ikmpd, and dump all secasvar leaves 7093 * and send, 7094 * <base> ..... 7095 * to the ikmpd. 7096 * 7097 * m will always be freed. 7098 */ 7099 static int 7100 key_dump(struct socket *so, struct mbuf *m0, 7101 const struct sadb_msghdr *mhp) 7102 { 7103 u_int16_t proto; 7104 u_int8_t satype; 7105 struct mbuf *n; 7106 int s; 7107 int error, len, ok; 7108 7109 KASSERT(so != NULL); 7110 KASSERT(m0 != NULL); 7111 KASSERT(mhp != NULL); 7112 KASSERT(mhp->msg != NULL); 7113 7114 /* map satype to proto */ 7115 satype = mhp->msg->sadb_msg_satype; 7116 if ((proto = key_satype2proto(satype)) == 0) { 7117 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 7118 return key_senderror(so, m0, EINVAL); 7119 } 7120 7121 /* 7122 * If the requestor has insufficient socket-buffer space 7123 * for the entire chain, nobody gets any response to the DUMP. 7124 * XXX For now, only the requestor ever gets anything. 7125 * Moreover, if the requestor has any space at all, they receive 7126 * the entire chain, otherwise the request is refused with ENOBUFS. 7127 */ 7128 if (sbspace(&so->so_rcv) <= 0) { 7129 return key_senderror(so, m0, ENOBUFS); 7130 } 7131 7132 s = splsoftnet(); 7133 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7134 splx(s); 7135 7136 if (n == NULL) { 7137 return key_senderror(so, m0, ENOENT); 7138 } 7139 { 7140 uint64_t *ps = PFKEY_STAT_GETREF(); 7141 ps[PFKEY_STAT_IN_TOTAL]++; 7142 ps[PFKEY_STAT_IN_BYTES] += len; 7143 PFKEY_STAT_PUTREF(); 7144 } 7145 7146 /* 7147 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7148 * The requestor receives either the entire chain, or an 7149 * error message with ENOBUFS. 7150 * 7151 * sbappendaddrchain() takes the chain of entries, one 7152 * packet-record per SPD entry, prepends the key_src sockaddr 7153 * to each packet-record, links the sockaddr mbufs into a new 7154 * list of records, then appends the entire resulting 7155 * list to the requesting socket. 7156 */ 7157 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 7158 n, SB_PRIO_ONESHOT_OVERFLOW); 7159 7160 if (!ok) { 7161 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7162 m_freem(n); 7163 return key_senderror(so, m0, ENOBUFS); 7164 } 7165 7166 m_freem(m0); 7167 return 0; 7168 } 7169 7170 /* 7171 * SADB_X_PROMISC processing 7172 * 7173 * m will always be freed. 7174 */ 7175 static int 7176 key_promisc(struct socket *so, struct mbuf *m, 7177 const struct sadb_msghdr *mhp) 7178 { 7179 int olen; 7180 7181 KASSERT(so != NULL); 7182 KASSERT(m != NULL); 7183 KASSERT(mhp != NULL); 7184 KASSERT(mhp->msg != NULL); 7185 7186 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7187 7188 if (olen < sizeof(struct sadb_msg)) { 7189 #if 1 7190 return key_senderror(so, m, EINVAL); 7191 #else 7192 m_freem(m); 7193 return 0; 7194 #endif 7195 } else if (olen == sizeof(struct sadb_msg)) { 7196 /* enable/disable promisc mode */ 7197 struct keycb *kp; 7198 7199 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7200 return key_senderror(so, m, EINVAL); 7201 mhp->msg->sadb_msg_errno = 0; 7202 switch (mhp->msg->sadb_msg_satype) { 7203 case 0: 7204 case 1: 7205 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7206 break; 7207 default: 7208 return key_senderror(so, m, EINVAL); 7209 } 7210 7211 /* send the original message back to everyone */ 7212 mhp->msg->sadb_msg_errno = 0; 7213 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7214 } else { 7215 /* send packet as is */ 7216 7217 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7218 7219 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7220 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7221 } 7222 } 7223 7224 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7225 const struct sadb_msghdr *) = { 7226 NULL, /* SADB_RESERVED */ 7227 key_getspi, /* SADB_GETSPI */ 7228 key_update, /* SADB_UPDATE */ 7229 key_add, /* SADB_ADD */ 7230 key_delete, /* SADB_DELETE */ 7231 key_get, /* SADB_GET */ 7232 key_acquire2, /* SADB_ACQUIRE */ 7233 key_register, /* SADB_REGISTER */ 7234 NULL, /* SADB_EXPIRE */ 7235 key_flush, /* SADB_FLUSH */ 7236 key_dump, /* SADB_DUMP */ 7237 key_promisc, /* SADB_X_PROMISC */ 7238 NULL, /* SADB_X_PCHANGE */ 7239 key_spdadd, /* SADB_X_SPDUPDATE */ 7240 key_spdadd, /* SADB_X_SPDADD */ 7241 key_spddelete, /* SADB_X_SPDDELETE */ 7242 key_spdget, /* SADB_X_SPDGET */ 7243 NULL, /* SADB_X_SPDACQUIRE */ 7244 key_spddump, /* SADB_X_SPDDUMP */ 7245 key_spdflush, /* SADB_X_SPDFLUSH */ 7246 key_spdadd, /* SADB_X_SPDSETIDX */ 7247 NULL, /* SADB_X_SPDEXPIRE */ 7248 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7249 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7250 }; 7251 7252 /* 7253 * parse sadb_msg buffer to process PFKEYv2, 7254 * and create a data to response if needed. 7255 * I think to be dealed with mbuf directly. 7256 * IN: 7257 * msgp : pointer to pointer to a received buffer pulluped. 7258 * This is rewrited to response. 7259 * so : pointer to socket. 7260 * OUT: 7261 * length for buffer to send to user process. 7262 */ 7263 int 7264 key_parse(struct mbuf *m, struct socket *so) 7265 { 7266 struct sadb_msg *msg; 7267 struct sadb_msghdr mh; 7268 u_int orglen; 7269 int error; 7270 int target; 7271 7272 KASSERT(m != NULL); 7273 KASSERT(so != NULL); 7274 7275 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7276 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7277 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 7278 kdebug_sadb(msg); 7279 } 7280 #endif 7281 7282 if (m->m_len < sizeof(struct sadb_msg)) { 7283 m = m_pullup(m, sizeof(struct sadb_msg)); 7284 if (!m) 7285 return ENOBUFS; 7286 } 7287 msg = mtod(m, struct sadb_msg *); 7288 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7289 target = KEY_SENDUP_ONE; 7290 7291 if ((m->m_flags & M_PKTHDR) == 0 || 7292 m->m_pkthdr.len != orglen) { 7293 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 7294 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7295 error = EINVAL; 7296 goto senderror; 7297 } 7298 7299 if (msg->sadb_msg_version != PF_KEY_V2) { 7300 ipseclog((LOG_DEBUG, 7301 "key_parse: PF_KEY version %u is mismatched.\n", 7302 msg->sadb_msg_version)); 7303 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7304 error = EINVAL; 7305 goto senderror; 7306 } 7307 7308 if (msg->sadb_msg_type > SADB_MAX) { 7309 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7310 msg->sadb_msg_type)); 7311 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7312 error = EINVAL; 7313 goto senderror; 7314 } 7315 7316 /* for old-fashioned code - should be nuked */ 7317 if (m->m_pkthdr.len > MCLBYTES) { 7318 m_freem(m); 7319 return ENOBUFS; 7320 } 7321 if (m->m_next) { 7322 struct mbuf *n; 7323 7324 MGETHDR(n, M_DONTWAIT, MT_DATA); 7325 if (n && m->m_pkthdr.len > MHLEN) { 7326 MCLGET(n, M_DONTWAIT); 7327 if ((n->m_flags & M_EXT) == 0) { 7328 m_free(n); 7329 n = NULL; 7330 } 7331 } 7332 if (!n) { 7333 m_freem(m); 7334 return ENOBUFS; 7335 } 7336 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7337 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7338 n->m_next = NULL; 7339 m_freem(m); 7340 m = n; 7341 } 7342 7343 /* align the mbuf chain so that extensions are in contiguous region. */ 7344 error = key_align(m, &mh); 7345 if (error) 7346 return error; 7347 7348 if (m->m_next) { /*XXX*/ 7349 m_freem(m); 7350 return ENOBUFS; 7351 } 7352 7353 msg = mh.msg; 7354 7355 /* check SA type */ 7356 switch (msg->sadb_msg_satype) { 7357 case SADB_SATYPE_UNSPEC: 7358 switch (msg->sadb_msg_type) { 7359 case SADB_GETSPI: 7360 case SADB_UPDATE: 7361 case SADB_ADD: 7362 case SADB_DELETE: 7363 case SADB_GET: 7364 case SADB_ACQUIRE: 7365 case SADB_EXPIRE: 7366 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7367 "when msg type=%u.\n", msg->sadb_msg_type)); 7368 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7369 error = EINVAL; 7370 goto senderror; 7371 } 7372 break; 7373 case SADB_SATYPE_AH: 7374 case SADB_SATYPE_ESP: 7375 case SADB_X_SATYPE_IPCOMP: 7376 case SADB_X_SATYPE_TCPSIGNATURE: 7377 switch (msg->sadb_msg_type) { 7378 case SADB_X_SPDADD: 7379 case SADB_X_SPDDELETE: 7380 case SADB_X_SPDGET: 7381 case SADB_X_SPDDUMP: 7382 case SADB_X_SPDFLUSH: 7383 case SADB_X_SPDSETIDX: 7384 case SADB_X_SPDUPDATE: 7385 case SADB_X_SPDDELETE2: 7386 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7387 msg->sadb_msg_type)); 7388 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7389 error = EINVAL; 7390 goto senderror; 7391 } 7392 break; 7393 case SADB_SATYPE_RSVP: 7394 case SADB_SATYPE_OSPFV2: 7395 case SADB_SATYPE_RIPV2: 7396 case SADB_SATYPE_MIP: 7397 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7398 msg->sadb_msg_satype)); 7399 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7400 error = EOPNOTSUPP; 7401 goto senderror; 7402 case 1: /* XXX: What does it do? */ 7403 if (msg->sadb_msg_type == SADB_X_PROMISC) 7404 break; 7405 /*FALLTHROUGH*/ 7406 default: 7407 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7408 msg->sadb_msg_satype)); 7409 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7410 error = EINVAL; 7411 goto senderror; 7412 } 7413 7414 /* check field of upper layer protocol and address family */ 7415 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7416 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7417 struct sadb_address *src0, *dst0; 7418 u_int plen; 7419 7420 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7421 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7422 7423 /* check upper layer protocol */ 7424 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7425 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7426 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7427 error = EINVAL; 7428 goto senderror; 7429 } 7430 7431 /* check family */ 7432 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7433 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7434 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7435 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7436 error = EINVAL; 7437 goto senderror; 7438 } 7439 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7440 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7441 ipseclog((LOG_DEBUG, 7442 "key_parse: address struct size mismatched.\n")); 7443 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7444 error = EINVAL; 7445 goto senderror; 7446 } 7447 7448 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7449 case AF_INET: 7450 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7451 sizeof(struct sockaddr_in)) { 7452 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7453 error = EINVAL; 7454 goto senderror; 7455 } 7456 break; 7457 case AF_INET6: 7458 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7459 sizeof(struct sockaddr_in6)) { 7460 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7461 error = EINVAL; 7462 goto senderror; 7463 } 7464 break; 7465 default: 7466 ipseclog((LOG_DEBUG, 7467 "key_parse: unsupported address family.\n")); 7468 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7469 error = EAFNOSUPPORT; 7470 goto senderror; 7471 } 7472 7473 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7474 case AF_INET: 7475 plen = sizeof(struct in_addr) << 3; 7476 break; 7477 case AF_INET6: 7478 plen = sizeof(struct in6_addr) << 3; 7479 break; 7480 default: 7481 plen = 0; /*fool gcc*/ 7482 break; 7483 } 7484 7485 /* check max prefix length */ 7486 if (src0->sadb_address_prefixlen > plen || 7487 dst0->sadb_address_prefixlen > plen) { 7488 ipseclog((LOG_DEBUG, 7489 "key_parse: illegal prefixlen.\n")); 7490 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7491 error = EINVAL; 7492 goto senderror; 7493 } 7494 7495 /* 7496 * prefixlen == 0 is valid because there can be a case when 7497 * all addresses are matched. 7498 */ 7499 } 7500 7501 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7502 key_typesw[msg->sadb_msg_type] == NULL) { 7503 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7504 error = EINVAL; 7505 goto senderror; 7506 } 7507 7508 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7509 7510 senderror: 7511 msg->sadb_msg_errno = error; 7512 return key_sendup_mbuf(so, m, target); 7513 } 7514 7515 static int 7516 key_senderror(struct socket *so, struct mbuf *m, int code) 7517 { 7518 struct sadb_msg *msg; 7519 7520 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7521 7522 msg = mtod(m, struct sadb_msg *); 7523 msg->sadb_msg_errno = code; 7524 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7525 } 7526 7527 /* 7528 * set the pointer to each header into message buffer. 7529 * m will be freed on error. 7530 * XXX larger-than-MCLBYTES extension? 7531 */ 7532 static int 7533 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7534 { 7535 struct mbuf *n; 7536 struct sadb_ext *ext; 7537 size_t off, end; 7538 int extlen; 7539 int toff; 7540 7541 KASSERT(m != NULL); 7542 KASSERT(mhp != NULL); 7543 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7544 7545 /* initialize */ 7546 memset(mhp, 0, sizeof(*mhp)); 7547 7548 mhp->msg = mtod(m, struct sadb_msg *); 7549 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7550 7551 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7552 extlen = end; /*just in case extlen is not updated*/ 7553 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7554 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7555 if (!n) { 7556 /* m is already freed */ 7557 return ENOBUFS; 7558 } 7559 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7560 7561 /* set pointer */ 7562 switch (ext->sadb_ext_type) { 7563 case SADB_EXT_SA: 7564 case SADB_EXT_ADDRESS_SRC: 7565 case SADB_EXT_ADDRESS_DST: 7566 case SADB_EXT_ADDRESS_PROXY: 7567 case SADB_EXT_LIFETIME_CURRENT: 7568 case SADB_EXT_LIFETIME_HARD: 7569 case SADB_EXT_LIFETIME_SOFT: 7570 case SADB_EXT_KEY_AUTH: 7571 case SADB_EXT_KEY_ENCRYPT: 7572 case SADB_EXT_IDENTITY_SRC: 7573 case SADB_EXT_IDENTITY_DST: 7574 case SADB_EXT_SENSITIVITY: 7575 case SADB_EXT_PROPOSAL: 7576 case SADB_EXT_SUPPORTED_AUTH: 7577 case SADB_EXT_SUPPORTED_ENCRYPT: 7578 case SADB_EXT_SPIRANGE: 7579 case SADB_X_EXT_POLICY: 7580 case SADB_X_EXT_SA2: 7581 case SADB_X_EXT_NAT_T_TYPE: 7582 case SADB_X_EXT_NAT_T_SPORT: 7583 case SADB_X_EXT_NAT_T_DPORT: 7584 case SADB_X_EXT_NAT_T_OAI: 7585 case SADB_X_EXT_NAT_T_OAR: 7586 case SADB_X_EXT_NAT_T_FRAG: 7587 /* duplicate check */ 7588 /* 7589 * XXX Are there duplication payloads of either 7590 * KEY_AUTH or KEY_ENCRYPT ? 7591 */ 7592 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7593 ipseclog((LOG_DEBUG, 7594 "key_align: duplicate ext_type %u " 7595 "is passed.\n", ext->sadb_ext_type)); 7596 m_freem(m); 7597 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7598 return EINVAL; 7599 } 7600 break; 7601 default: 7602 ipseclog((LOG_DEBUG, 7603 "key_align: invalid ext_type %u is passed.\n", 7604 ext->sadb_ext_type)); 7605 m_freem(m); 7606 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7607 return EINVAL; 7608 } 7609 7610 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7611 7612 if (key_validate_ext(ext, extlen)) { 7613 m_freem(m); 7614 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7615 return EINVAL; 7616 } 7617 7618 n = m_pulldown(m, off, extlen, &toff); 7619 if (!n) { 7620 /* m is already freed */ 7621 return ENOBUFS; 7622 } 7623 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7624 7625 mhp->ext[ext->sadb_ext_type] = ext; 7626 mhp->extoff[ext->sadb_ext_type] = off; 7627 mhp->extlen[ext->sadb_ext_type] = extlen; 7628 } 7629 7630 if (off != end) { 7631 m_freem(m); 7632 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7633 return EINVAL; 7634 } 7635 7636 return 0; 7637 } 7638 7639 static int 7640 key_validate_ext(const struct sadb_ext *ext, int len) 7641 { 7642 const struct sockaddr *sa; 7643 enum { NONE, ADDR } checktype = NONE; 7644 int baselen = 0; 7645 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7646 7647 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7648 return EINVAL; 7649 7650 /* if it does not match minimum/maximum length, bail */ 7651 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7652 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7653 return EINVAL; 7654 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7655 return EINVAL; 7656 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7657 return EINVAL; 7658 7659 /* more checks based on sadb_ext_type XXX need more */ 7660 switch (ext->sadb_ext_type) { 7661 case SADB_EXT_ADDRESS_SRC: 7662 case SADB_EXT_ADDRESS_DST: 7663 case SADB_EXT_ADDRESS_PROXY: 7664 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7665 checktype = ADDR; 7666 break; 7667 case SADB_EXT_IDENTITY_SRC: 7668 case SADB_EXT_IDENTITY_DST: 7669 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7670 SADB_X_IDENTTYPE_ADDR) { 7671 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7672 checktype = ADDR; 7673 } else 7674 checktype = NONE; 7675 break; 7676 default: 7677 checktype = NONE; 7678 break; 7679 } 7680 7681 switch (checktype) { 7682 case NONE: 7683 break; 7684 case ADDR: 7685 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7686 if (len < baselen + sal) 7687 return EINVAL; 7688 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7689 return EINVAL; 7690 break; 7691 } 7692 7693 return 0; 7694 } 7695 7696 static int 7697 key_do_init(void) 7698 { 7699 int i; 7700 7701 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7702 7703 callout_init(&key_timehandler_ch, 0); 7704 7705 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7706 LIST_INIT(&sptree[i]); 7707 } 7708 7709 LIST_INIT(&sahtree); 7710 7711 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7712 LIST_INIT(®tree[i]); 7713 } 7714 7715 #ifndef IPSEC_NONBLOCK_ACQUIRE 7716 LIST_INIT(&acqtree); 7717 #endif 7718 LIST_INIT(&spacqtree); 7719 7720 /* system default */ 7721 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7722 ip4_def_policy.refcnt++; /*never reclaim this*/ 7723 7724 #ifdef INET6 7725 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7726 ip6_def_policy.refcnt++; /*never reclaim this*/ 7727 #endif 7728 7729 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7730 7731 /* initialize key statistics */ 7732 keystat.getspi_count = 1; 7733 7734 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7735 7736 return (0); 7737 } 7738 7739 void 7740 key_init(void) 7741 { 7742 static ONCE_DECL(key_init_once); 7743 7744 sysctl_net_keyv2_setup(NULL); 7745 sysctl_net_key_compat_setup(NULL); 7746 7747 RUN_ONCE(&key_init_once, key_do_init); 7748 } 7749 7750 /* 7751 * XXX: maybe This function is called after INBOUND IPsec processing. 7752 * 7753 * Special check for tunnel-mode packets. 7754 * We must make some checks for consistency between inner and outer IP header. 7755 * 7756 * xxx more checks to be provided 7757 */ 7758 int 7759 key_checktunnelsanity( 7760 struct secasvar *sav, 7761 u_int family, 7762 void *src, 7763 void *dst 7764 ) 7765 { 7766 7767 KASSERT(sav->sah != NULL); 7768 7769 /* XXX: check inner IP header */ 7770 7771 return 1; 7772 } 7773 7774 #if 0 7775 #define hostnamelen strlen(hostname) 7776 7777 /* 7778 * Get FQDN for the host. 7779 * If the administrator configured hostname (by hostname(1)) without 7780 * domain name, returns nothing. 7781 */ 7782 static const char * 7783 key_getfqdn(void) 7784 { 7785 int i; 7786 int hasdot; 7787 static char fqdn[MAXHOSTNAMELEN + 1]; 7788 7789 if (!hostnamelen) 7790 return NULL; 7791 7792 /* check if it comes with domain name. */ 7793 hasdot = 0; 7794 for (i = 0; i < hostnamelen; i++) { 7795 if (hostname[i] == '.') 7796 hasdot++; 7797 } 7798 if (!hasdot) 7799 return NULL; 7800 7801 /* NOTE: hostname may not be NUL-terminated. */ 7802 memset(fqdn, 0, sizeof(fqdn)); 7803 memcpy(fqdn, hostname, hostnamelen); 7804 fqdn[hostnamelen] = '\0'; 7805 return fqdn; 7806 } 7807 7808 /* 7809 * get username@FQDN for the host/user. 7810 */ 7811 static const char * 7812 key_getuserfqdn(void) 7813 { 7814 const char *host; 7815 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7816 struct proc *p = curproc; 7817 char *q; 7818 7819 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7820 return NULL; 7821 if (!(host = key_getfqdn())) 7822 return NULL; 7823 7824 /* NOTE: s_login may not be-NUL terminated. */ 7825 memset(userfqdn, 0, sizeof(userfqdn)); 7826 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7827 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7828 q = userfqdn + strlen(userfqdn); 7829 *q++ = '@'; 7830 memcpy(q, host, strlen(host)); 7831 q += strlen(host); 7832 *q++ = '\0'; 7833 7834 return userfqdn; 7835 } 7836 #endif 7837 7838 /* record data transfer on SA, and update timestamps */ 7839 void 7840 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7841 { 7842 7843 KASSERT(sav != NULL); 7844 KASSERT(m != NULL); 7845 if (!sav->lft_c) 7846 return; 7847 7848 /* 7849 * XXX Currently, there is a difference of bytes size 7850 * between inbound and outbound processing. 7851 */ 7852 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7853 /* to check bytes lifetime is done in key_timehandler(). */ 7854 7855 /* 7856 * We use the number of packets as the unit of 7857 * sadb_lifetime_allocations. We increment the variable 7858 * whenever {esp,ah}_{in,out}put is called. 7859 */ 7860 sav->lft_c->sadb_lifetime_allocations++; 7861 /* XXX check for expires? */ 7862 7863 /* 7864 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7865 * in seconds. HARD and SOFT lifetime are measured by the time 7866 * difference (again in seconds) from sadb_lifetime_usetime. 7867 * 7868 * usetime 7869 * v expire expire 7870 * -----+-----+--------+---> t 7871 * <--------------> HARD 7872 * <-----> SOFT 7873 */ 7874 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7875 /* XXX check for expires? */ 7876 7877 return; 7878 } 7879 7880 /* dumb version */ 7881 void 7882 key_sa_routechange(struct sockaddr *dst) 7883 { 7884 struct secashead *sah; 7885 struct route *ro; 7886 const struct sockaddr *sa; 7887 7888 LIST_FOREACH(sah, &sahtree, chain) { 7889 ro = &sah->sa_route; 7890 sa = rtcache_getdst(ro); 7891 if (sa != NULL && dst->sa_len == sa->sa_len && 7892 memcmp(dst, sa, dst->sa_len) == 0) 7893 rtcache_free(ro); 7894 } 7895 7896 return; 7897 } 7898 7899 static void 7900 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7901 { 7902 7903 KASSERT(sav != NULL); 7904 7905 if (sav->state == state) 7906 return; 7907 7908 if (__LIST_CHAINED(sav)) 7909 LIST_REMOVE(sav, chain); 7910 7911 sav->state = state; 7912 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7913 } 7914 7915 /* XXX too much? */ 7916 static struct mbuf * 7917 key_alloc_mbuf(int l) 7918 { 7919 struct mbuf *m = NULL, *n; 7920 int len, t; 7921 7922 len = l; 7923 while (len > 0) { 7924 MGET(n, M_DONTWAIT, MT_DATA); 7925 if (n && len > MLEN) 7926 MCLGET(n, M_DONTWAIT); 7927 if (!n) { 7928 m_freem(m); 7929 return NULL; 7930 } 7931 7932 n->m_next = NULL; 7933 n->m_len = 0; 7934 n->m_len = M_TRAILINGSPACE(n); 7935 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7936 if (n->m_len > len) { 7937 t = (n->m_len - len) & ~(sizeof(long) - 1); 7938 n->m_data += t; 7939 n->m_len = len; 7940 } 7941 7942 len -= n->m_len; 7943 7944 if (m) 7945 m_cat(m, n); 7946 else 7947 m = n; 7948 } 7949 7950 return m; 7951 } 7952 7953 static struct mbuf * 7954 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7955 { 7956 struct secashead *sah; 7957 struct secasvar *sav; 7958 u_int16_t proto; 7959 u_int8_t satype; 7960 u_int8_t state; 7961 int cnt; 7962 struct mbuf *m, *n; 7963 7964 /* map satype to proto */ 7965 if ((proto = key_satype2proto(req_satype)) == 0) { 7966 *errorp = EINVAL; 7967 return (NULL); 7968 } 7969 7970 /* count sav entries to be sent to the userland. */ 7971 cnt = 0; 7972 LIST_FOREACH(sah, &sahtree, chain) { 7973 if (req_satype != SADB_SATYPE_UNSPEC && 7974 proto != sah->saidx.proto) 7975 continue; 7976 7977 SASTATE_ANY_FOREACH(state) { 7978 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7979 cnt++; 7980 } 7981 } 7982 } 7983 7984 if (cnt == 0) { 7985 *errorp = ENOENT; 7986 return (NULL); 7987 } 7988 7989 /* send this to the userland, one at a time. */ 7990 m = NULL; 7991 LIST_FOREACH(sah, &sahtree, chain) { 7992 if (req_satype != SADB_SATYPE_UNSPEC && 7993 proto != sah->saidx.proto) 7994 continue; 7995 7996 /* map proto to satype */ 7997 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7998 m_freem(m); 7999 *errorp = EINVAL; 8000 return (NULL); 8001 } 8002 8003 SASTATE_ANY_FOREACH(state) { 8004 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8005 n = key_setdumpsa(sav, SADB_DUMP, satype, 8006 --cnt, pid); 8007 if (!n) { 8008 m_freem(m); 8009 *errorp = ENOBUFS; 8010 return (NULL); 8011 } 8012 8013 if (!m) 8014 m = n; 8015 else 8016 m_cat(m, n); 8017 } 8018 } 8019 } 8020 8021 if (!m) { 8022 *errorp = EINVAL; 8023 return (NULL); 8024 } 8025 8026 if ((m->m_flags & M_PKTHDR) != 0) { 8027 m->m_pkthdr.len = 0; 8028 for (n = m; n; n = n->m_next) 8029 m->m_pkthdr.len += n->m_len; 8030 } 8031 8032 *errorp = 0; 8033 return (m); 8034 } 8035 8036 static struct mbuf * 8037 key_setspddump(int *errorp, pid_t pid) 8038 { 8039 struct secpolicy *sp; 8040 int cnt; 8041 u_int dir; 8042 struct mbuf *m, *n; 8043 8044 /* search SPD entry and get buffer size. */ 8045 cnt = 0; 8046 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8047 LIST_FOREACH(sp, &sptree[dir], chain) { 8048 cnt++; 8049 } 8050 } 8051 8052 if (cnt == 0) { 8053 *errorp = ENOENT; 8054 return (NULL); 8055 } 8056 8057 m = NULL; 8058 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8059 LIST_FOREACH(sp, &sptree[dir], chain) { 8060 --cnt; 8061 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8062 8063 if (!n) { 8064 *errorp = ENOBUFS; 8065 m_freem(m); 8066 return (NULL); 8067 } 8068 if (!m) 8069 m = n; 8070 else { 8071 m->m_pkthdr.len += n->m_pkthdr.len; 8072 m_cat(m, n); 8073 } 8074 } 8075 } 8076 8077 *errorp = 0; 8078 return (m); 8079 } 8080 8081 int 8082 key_get_used(void) { 8083 return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || 8084 !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); 8085 } 8086 8087 void 8088 key_update_used(void) 8089 { 8090 switch (ipsec_enabled) { 8091 default: 8092 case 0: 8093 #ifdef notyet 8094 /* XXX: racy */ 8095 ipsec_used = 0; 8096 #endif 8097 break; 8098 case 1: 8099 #ifndef notyet 8100 /* XXX: racy */ 8101 if (!ipsec_used) 8102 #endif 8103 ipsec_used = key_get_used(); 8104 break; 8105 case 2: 8106 ipsec_used = 1; 8107 break; 8108 } 8109 } 8110 8111 static int 8112 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8113 { 8114 struct mbuf *m, *n; 8115 int err2 = 0; 8116 char *p, *ep; 8117 size_t len; 8118 int s, error; 8119 8120 if (newp) 8121 return (EPERM); 8122 if (namelen != 1) 8123 return (EINVAL); 8124 8125 s = splsoftnet(); 8126 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8127 splx(s); 8128 if (!m) 8129 return (error); 8130 if (!oldp) 8131 *oldlenp = m->m_pkthdr.len; 8132 else { 8133 p = oldp; 8134 if (*oldlenp < m->m_pkthdr.len) { 8135 err2 = ENOMEM; 8136 ep = p + *oldlenp; 8137 } else { 8138 *oldlenp = m->m_pkthdr.len; 8139 ep = p + m->m_pkthdr.len; 8140 } 8141 for (n = m; n; n = n->m_next) { 8142 len = (ep - p < n->m_len) ? 8143 ep - p : n->m_len; 8144 error = copyout(mtod(n, const void *), p, len); 8145 p += len; 8146 if (error) 8147 break; 8148 } 8149 if (error == 0) 8150 error = err2; 8151 } 8152 m_freem(m); 8153 8154 return (error); 8155 } 8156 8157 static int 8158 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8159 { 8160 struct mbuf *m, *n; 8161 int err2 = 0; 8162 char *p, *ep; 8163 size_t len; 8164 int s, error; 8165 8166 if (newp) 8167 return (EPERM); 8168 if (namelen != 0) 8169 return (EINVAL); 8170 8171 s = splsoftnet(); 8172 m = key_setspddump(&error, l->l_proc->p_pid); 8173 splx(s); 8174 if (!m) 8175 return (error); 8176 if (!oldp) 8177 *oldlenp = m->m_pkthdr.len; 8178 else { 8179 p = oldp; 8180 if (*oldlenp < m->m_pkthdr.len) { 8181 err2 = ENOMEM; 8182 ep = p + *oldlenp; 8183 } else { 8184 *oldlenp = m->m_pkthdr.len; 8185 ep = p + m->m_pkthdr.len; 8186 } 8187 for (n = m; n; n = n->m_next) { 8188 len = (ep - p < n->m_len) ? 8189 ep - p : n->m_len; 8190 error = copyout(mtod(n, const void *), p, len); 8191 p += len; 8192 if (error) 8193 break; 8194 } 8195 if (error == 0) 8196 error = err2; 8197 } 8198 m_freem(m); 8199 8200 return (error); 8201 } 8202 8203 /* 8204 * Create sysctl tree for native IPSEC key knobs, originally 8205 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8206 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8207 * and in any case the part of our sysctl namespace used for dumping the 8208 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8209 * namespace, for API reasons. 8210 * 8211 * Pending a consensus on the right way to fix this, add a level of 8212 * indirection in how we number the `native' IPSEC key nodes; 8213 * and (as requested by Andrew Brown) move registration of the 8214 * KAME-compatible names to a separate function. 8215 */ 8216 #if 0 8217 # define IPSEC_PFKEY PF_KEY_V2 8218 # define IPSEC_PFKEY_NAME "keyv2" 8219 #else 8220 # define IPSEC_PFKEY PF_KEY 8221 # define IPSEC_PFKEY_NAME "key" 8222 #endif 8223 8224 static int 8225 sysctl_net_key_stats(SYSCTLFN_ARGS) 8226 { 8227 8228 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8229 } 8230 8231 static void 8232 sysctl_net_keyv2_setup(struct sysctllog **clog) 8233 { 8234 8235 sysctl_createv(clog, 0, NULL, NULL, 8236 CTLFLAG_PERMANENT, 8237 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8238 NULL, 0, NULL, 0, 8239 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8240 8241 sysctl_createv(clog, 0, NULL, NULL, 8242 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8243 CTLTYPE_INT, "debug", NULL, 8244 NULL, 0, &key_debug_level, 0, 8245 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8246 sysctl_createv(clog, 0, NULL, NULL, 8247 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8248 CTLTYPE_INT, "spi_try", NULL, 8249 NULL, 0, &key_spi_trycnt, 0, 8250 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8251 sysctl_createv(clog, 0, NULL, NULL, 8252 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8253 CTLTYPE_INT, "spi_min_value", NULL, 8254 NULL, 0, &key_spi_minval, 0, 8255 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8256 sysctl_createv(clog, 0, NULL, NULL, 8257 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8258 CTLTYPE_INT, "spi_max_value", NULL, 8259 NULL, 0, &key_spi_maxval, 0, 8260 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8261 sysctl_createv(clog, 0, NULL, NULL, 8262 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8263 CTLTYPE_INT, "random_int", NULL, 8264 NULL, 0, &key_int_random, 0, 8265 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8266 sysctl_createv(clog, 0, NULL, NULL, 8267 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8268 CTLTYPE_INT, "larval_lifetime", NULL, 8269 NULL, 0, &key_larval_lifetime, 0, 8270 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8271 sysctl_createv(clog, 0, NULL, NULL, 8272 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8273 CTLTYPE_INT, "blockacq_count", NULL, 8274 NULL, 0, &key_blockacq_count, 0, 8275 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8276 sysctl_createv(clog, 0, NULL, NULL, 8277 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8278 CTLTYPE_INT, "blockacq_lifetime", NULL, 8279 NULL, 0, &key_blockacq_lifetime, 0, 8280 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8281 sysctl_createv(clog, 0, NULL, NULL, 8282 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8283 CTLTYPE_INT, "esp_keymin", NULL, 8284 NULL, 0, &ipsec_esp_keymin, 0, 8285 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8286 sysctl_createv(clog, 0, NULL, NULL, 8287 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8288 CTLTYPE_INT, "prefered_oldsa", NULL, 8289 NULL, 0, &key_prefered_oldsa, 0, 8290 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8291 sysctl_createv(clog, 0, NULL, NULL, 8292 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8293 CTLTYPE_INT, "esp_auth", NULL, 8294 NULL, 0, &ipsec_esp_auth, 0, 8295 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8296 sysctl_createv(clog, 0, NULL, NULL, 8297 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8298 CTLTYPE_INT, "ah_keymin", NULL, 8299 NULL, 0, &ipsec_ah_keymin, 0, 8300 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8301 sysctl_createv(clog, 0, NULL, NULL, 8302 CTLFLAG_PERMANENT, 8303 CTLTYPE_STRUCT, "stats", 8304 SYSCTL_DESCR("PF_KEY statistics"), 8305 sysctl_net_key_stats, 0, NULL, 0, 8306 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8307 } 8308 8309 /* 8310 * Register sysctl names used by setkey(8). For historical reasons, 8311 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8312 * for both IPSEC and KAME IPSEC. 8313 */ 8314 static void 8315 sysctl_net_key_compat_setup(struct sysctllog **clog) 8316 { 8317 8318 sysctl_createv(clog, 0, NULL, NULL, 8319 CTLFLAG_PERMANENT, 8320 CTLTYPE_NODE, "key", NULL, 8321 NULL, 0, NULL, 0, 8322 CTL_NET, PF_KEY, CTL_EOL); 8323 8324 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8325 sysctl_createv(clog, 0, NULL, NULL, 8326 CTLFLAG_PERMANENT, 8327 CTLTYPE_STRUCT, "dumpsa", NULL, 8328 sysctl_net_key_dumpsa, 0, NULL, 0, 8329 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8330 sysctl_createv(clog, 0, NULL, NULL, 8331 CTLFLAG_PERMANENT, 8332 CTLTYPE_STRUCT, "dumpsp", NULL, 8333 sysctl_net_key_dumpsp, 0, NULL, 0, 8334 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8335 } 8336
Indexes created Wed Sep 24 05:09:52 GMT 2025