key.c revision 1.96
1 /* $NetBSD: key.c,v 1.96 2016/03/06 04:19:51 christos 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 1.96 2016/03/06 04:19:51 christos Exp $"); 36 37 /* 38 * This code is referd to RFC 2367 39 */ 40 41 #include "opt_inet.h" 42 #ifdef __FreeBSD__ 43 #include "opt_inet6.h" 44 #endif 45 #include "opt_ipsec.h" 46 #ifdef __NetBSD__ 47 #include "opt_gateway.h" 48 #endif 49 50 #include <sys/types.h> 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/callout.h> 54 #include <sys/kernel.h> 55 #include <sys/mbuf.h> 56 #include <sys/domain.h> 57 #include <sys/protosw.h> 58 #include <sys/malloc.h> 59 #include <sys/socket.h> 60 #include <sys/socketvar.h> 61 #include <sys/sysctl.h> 62 #include <sys/errno.h> 63 #include <sys/proc.h> 64 #include <sys/queue.h> 65 #include <sys/syslog.h> 66 #include <sys/once.h> 67 #include <sys/cprng.h> 68 69 #include <net/if.h> 70 #include <net/route.h> 71 #include <net/raw_cb.h> 72 73 #include <netinet/in.h> 74 #include <netinet/in_systm.h> 75 #include <netinet/ip.h> 76 #include <netinet/in_var.h> 77 #ifdef INET 78 #include <netinet/ip_var.h> 79 #endif 80 81 #ifdef INET6 82 #include <netinet/ip6.h> 83 #include <netinet6/in6_var.h> 84 #include <netinet6/ip6_var.h> 85 #endif /* INET6 */ 86 87 #ifdef INET 88 #include <netinet/in_pcb.h> 89 #endif 90 #ifdef INET6 91 #include <netinet6/in6_pcb.h> 92 #endif /* INET6 */ 93 94 #include <net/pfkeyv2.h> 95 #include <netipsec/keydb.h> 96 #include <netipsec/key.h> 97 #include <netipsec/keysock.h> 98 #include <netipsec/key_debug.h> 99 100 #include <netipsec/ipsec.h> 101 #ifdef INET6 102 #include <netipsec/ipsec6.h> 103 #endif 104 #include <netipsec/ipsec_private.h> 105 106 #include <netipsec/xform.h> 107 #include <netipsec/ipsec_osdep.h> 108 #include <netipsec/ipcomp.h> 109 110 111 #include <net/net_osdep.h> 112 113 #define FULLMASK 0xff 114 #define _BITS(bytes) ((bytes) << 3) 115 116 #define PORT_NONE 0 117 #define PORT_LOOSE 1 118 #define PORT_STRICT 2 119 120 percpu_t *pfkeystat_percpu; 121 122 /* 123 * Note on SA reference counting: 124 * - SAs that are not in DEAD state will have (total external reference + 1) 125 * following value in reference count field. they cannot be freed and are 126 * referenced from SA header. 127 * - SAs that are in DEAD state will have (total external reference) 128 * in reference count field. they are ready to be freed. reference from 129 * SA header will be removed in key_delsav(), when the reference count 130 * field hits 0 (= no external reference other than from SA header. 131 */ 132 133 u_int32_t key_debug_level = 0; 134 static u_int key_spi_trycnt = 1000; 135 static u_int32_t key_spi_minval = 0x100; 136 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 137 static u_int32_t policy_id = 0; 138 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 139 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 140 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 141 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 142 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 143 144 static u_int32_t acq_seq = 0; 145 146 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 147 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 148 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 149 /* registed list */ 150 #ifndef IPSEC_NONBLOCK_ACQUIRE 151 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 152 #endif 153 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 154 155 /* search order for SAs */ 156 /* 157 * This order is important because we must select the oldest SA 158 * for outbound processing. For inbound, This is not important. 159 */ 160 static const u_int saorder_state_valid_prefer_old[] = { 161 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 162 }; 163 static const u_int saorder_state_valid_prefer_new[] = { 164 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 165 }; 166 167 static const u_int saorder_state_alive[] = { 168 /* except DEAD */ 169 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 170 }; 171 static const u_int saorder_state_any[] = { 172 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 173 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 174 }; 175 176 static const int minsize[] = { 177 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 178 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 179 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 180 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 181 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 182 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 183 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 184 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 185 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 186 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 187 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 188 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 189 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 190 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 191 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 192 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 193 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 194 0, /* SADB_X_EXT_KMPRIVATE */ 195 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 196 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 197 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 198 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 199 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 200 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 201 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 202 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 203 }; 204 static const int maxsize[] = { 205 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 206 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 207 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 208 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 209 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 210 0, /* SADB_EXT_ADDRESS_SRC */ 211 0, /* SADB_EXT_ADDRESS_DST */ 212 0, /* SADB_EXT_ADDRESS_PROXY */ 213 0, /* SADB_EXT_KEY_AUTH */ 214 0, /* SADB_EXT_KEY_ENCRYPT */ 215 0, /* SADB_EXT_IDENTITY_SRC */ 216 0, /* SADB_EXT_IDENTITY_DST */ 217 0, /* SADB_EXT_SENSITIVITY */ 218 0, /* SADB_EXT_PROPOSAL */ 219 0, /* SADB_EXT_SUPPORTED_AUTH */ 220 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 221 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 222 0, /* SADB_X_EXT_KMPRIVATE */ 223 0, /* SADB_X_EXT_POLICY */ 224 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 225 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 226 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 227 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 228 0, /* SADB_X_EXT_NAT_T_OAI */ 229 0, /* SADB_X_EXT_NAT_T_OAR */ 230 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 231 }; 232 233 static int ipsec_esp_keymin = 256; 234 static int ipsec_esp_auth = 0; 235 static int ipsec_ah_keymin = 128; 236 237 #ifdef SYSCTL_DECL 238 SYSCTL_DECL(_net_key); 239 #endif 240 241 #ifdef SYSCTL_INT 242 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 243 &key_debug_level, 0, ""); 244 245 /* max count of trial for the decision of spi value */ 246 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 247 &key_spi_trycnt, 0, ""); 248 249 /* minimum spi value to allocate automatically. */ 250 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 251 &key_spi_minval, 0, ""); 252 253 /* maximun spi value to allocate automatically. */ 254 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 255 &key_spi_maxval, 0, ""); 256 257 /* interval to initialize randseed */ 258 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 259 &key_int_random, 0, ""); 260 261 /* lifetime for larval SA */ 262 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 263 &key_larval_lifetime, 0, ""); 264 265 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 266 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 267 &key_blockacq_count, 0, ""); 268 269 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 270 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 271 &key_blockacq_lifetime, 0, ""); 272 273 /* ESP auth */ 274 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 275 &ipsec_esp_auth, 0, ""); 276 277 /* minimum ESP key length */ 278 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 279 &ipsec_esp_keymin, 0, ""); 280 281 /* minimum AH key length */ 282 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 283 &ipsec_ah_keymin, 0, ""); 284 285 /* perfered old SA rather than new SA */ 286 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 287 &key_prefered_oldsa, 0, ""); 288 #endif /* SYSCTL_INT */ 289 290 #ifndef LIST_FOREACH 291 #define LIST_FOREACH(elm, head, field) \ 292 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field)) 293 #endif 294 #define __LIST_CHAINED(elm) \ 295 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 296 #define LIST_INSERT_TAIL(head, elm, type, field) \ 297 do {\ 298 struct type *curelm = LIST_FIRST(head); \ 299 if (curelm == NULL) {\ 300 LIST_INSERT_HEAD(head, elm, field); \ 301 } else { \ 302 while (LIST_NEXT(curelm, field)) \ 303 curelm = LIST_NEXT(curelm, field);\ 304 LIST_INSERT_AFTER(curelm, elm, field);\ 305 }\ 306 } while (0) 307 308 #define KEY_CHKSASTATE(head, sav, name) \ 309 /* do */ { \ 310 if ((head) != (sav)) { \ 311 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 312 (name), (head), (sav))); \ 313 continue; \ 314 } \ 315 } /* while (0) */ 316 317 #define KEY_CHKSPDIR(head, sp, name) \ 318 do { \ 319 if ((head) != (sp)) { \ 320 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 321 "anyway continue.\n", \ 322 (name), (head), (sp))); \ 323 } \ 324 } while (0) 325 326 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management"); 327 328 #if 1 329 #define KMALLOC(p, t, n) \ 330 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT)) 331 #define KFREE(p) \ 332 free((p), M_SECA) 333 #else 334 #define KMALLOC(p, t, n) \ 335 do { \ 336 ((p) = malloc((unsigned long)(n), M_SECA, M_NOWAIT)); \ 337 printf("%s %d: %p <- KMALLOC(%s, %d)\n", \ 338 __FILE__, __LINE__, (p), #t, n); \ 339 } while (0) 340 341 #define KFREE(p) \ 342 do { \ 343 printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \ 344 free((p), M_SECA); \ 345 } while (0) 346 #endif 347 348 /* 349 * set parameters into secpolicyindex buffer. 350 * Must allocate secpolicyindex buffer passed to this function. 351 */ 352 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 353 do { \ 354 memset((idx), 0, sizeof(struct secpolicyindex)); \ 355 (idx)->dir = (_dir); \ 356 (idx)->prefs = (ps); \ 357 (idx)->prefd = (pd); \ 358 (idx)->ul_proto = (ulp); \ 359 memcpy(&(idx)->src, (s), ((const struct sockaddr *)(s))->sa_len); \ 360 memcpy(&(idx)->dst, (d), ((const struct sockaddr *)(d))->sa_len); \ 361 } while (0) 362 363 /* 364 * set parameters into secasindex buffer. 365 * Must allocate secasindex buffer before calling this function. 366 */ 367 static int 368 key_setsecasidx (int, int, int, const struct sadb_address *, 369 const struct sadb_address *, struct secasindex *); 370 371 /* key statistics */ 372 struct _keystat { 373 u_long getspi_count; /* the avarage of count to try to get new SPI */ 374 } keystat; 375 376 struct sadb_msghdr { 377 struct sadb_msg *msg; 378 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 379 int extoff[SADB_EXT_MAX + 1]; 380 int extlen[SADB_EXT_MAX + 1]; 381 }; 382 383 static struct secasvar *key_allocsa_policy (const struct secasindex *); 384 static void key_freesp_so (struct secpolicy **); 385 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int); 386 static void key_delsp (struct secpolicy *); 387 static struct secpolicy *key_getsp (const struct secpolicyindex *); 388 static struct secpolicy *key_getspbyid (u_int32_t); 389 static u_int16_t key_newreqid (void); 390 static struct mbuf *key_gather_mbuf (struct mbuf *, 391 const struct sadb_msghdr *, int, int, ...); 392 static int key_spdadd (struct socket *, struct mbuf *, 393 const struct sadb_msghdr *); 394 static u_int32_t key_getnewspid (void); 395 static int key_spddelete (struct socket *, struct mbuf *, 396 const struct sadb_msghdr *); 397 static int key_spddelete2 (struct socket *, struct mbuf *, 398 const struct sadb_msghdr *); 399 static int key_spdget (struct socket *, struct mbuf *, 400 const struct sadb_msghdr *); 401 static int key_spdflush (struct socket *, struct mbuf *, 402 const struct sadb_msghdr *); 403 static int key_spddump (struct socket *, struct mbuf *, 404 const struct sadb_msghdr *); 405 static struct mbuf * key_setspddump (int *errorp, pid_t); 406 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 407 static int key_nat_map (struct socket *, struct mbuf *, 408 const struct sadb_msghdr *); 409 static struct mbuf *key_setdumpsp (struct secpolicy *, 410 u_int8_t, u_int32_t, pid_t); 411 static u_int key_getspreqmsglen (const struct secpolicy *); 412 static int key_spdexpire (struct secpolicy *); 413 static struct secashead *key_newsah (const struct secasindex *); 414 static void key_delsah (struct secashead *); 415 static struct secasvar *key_newsav (struct mbuf *, 416 const struct sadb_msghdr *, struct secashead *, int *, 417 const char*, int); 418 #define KEY_NEWSAV(m, sadb, sah, e) \ 419 key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 420 static void key_delsav (struct secasvar *); 421 static struct secashead *key_getsah (const struct secasindex *); 422 static struct secasvar *key_checkspidup (const struct secasindex *, u_int32_t); 423 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 424 static int key_setsaval (struct secasvar *, struct mbuf *, 425 const struct sadb_msghdr *); 426 static int key_mature (struct secasvar *); 427 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 428 u_int8_t, u_int32_t, u_int32_t); 429 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 430 static struct mbuf *key_setsadbxtype (u_int16_t); 431 static struct mbuf *key_setsadbxfrag (u_int16_t); 432 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 433 static int key_checksalen (const union sockaddr_union *); 434 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 435 u_int32_t, pid_t, u_int16_t); 436 static struct mbuf *key_setsadbsa (struct secasvar *); 437 static struct mbuf *key_setsadbaddr (u_int16_t, 438 const struct sockaddr *, u_int8_t, u_int16_t); 439 #if 0 440 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 441 int, u_int64_t); 442 #endif 443 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 444 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 445 u_int32_t); 446 static void *key_newbuf (const void *, u_int); 447 #ifdef INET6 448 static int key_ismyaddr6 (const struct sockaddr_in6 *); 449 #endif 450 451 /* flags for key_cmpsaidx() */ 452 #define CMP_HEAD 1 /* protocol, addresses. */ 453 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 454 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 455 #define CMP_EXACTLY 4 /* all elements. */ 456 static int key_cmpsaidx 457 (const struct secasindex *, const struct secasindex *, int); 458 459 static int key_sockaddrcmp (const struct sockaddr *, const struct sockaddr *, int); 460 static int key_bbcmp (const void *, const void *, u_int); 461 static u_int16_t key_satype2proto (u_int8_t); 462 static u_int8_t key_proto2satype (u_int16_t); 463 464 static int key_getspi (struct socket *, struct mbuf *, 465 const struct sadb_msghdr *); 466 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 467 const struct secasindex *); 468 static int key_handle_natt_info (struct secasvar *, 469 const struct sadb_msghdr *); 470 static int key_set_natt_ports (union sockaddr_union *, 471 union sockaddr_union *, 472 const struct sadb_msghdr *); 473 static int key_update (struct socket *, struct mbuf *, 474 const struct sadb_msghdr *); 475 #ifdef IPSEC_DOSEQCHECK 476 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 477 #endif 478 static int key_add (struct socket *, struct mbuf *, 479 const struct sadb_msghdr *); 480 static int key_setident (struct secashead *, struct mbuf *, 481 const struct sadb_msghdr *); 482 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 483 const struct sadb_msghdr *); 484 static int key_delete (struct socket *, struct mbuf *, 485 const struct sadb_msghdr *); 486 static int key_get (struct socket *, struct mbuf *, 487 const struct sadb_msghdr *); 488 489 static void key_getcomb_setlifetime (struct sadb_comb *); 490 static struct mbuf *key_getcomb_esp (void); 491 static struct mbuf *key_getcomb_ah (void); 492 static struct mbuf *key_getcomb_ipcomp (void); 493 static struct mbuf *key_getprop (const struct secasindex *); 494 495 static int key_acquire (const struct secasindex *, struct secpolicy *); 496 #ifndef IPSEC_NONBLOCK_ACQUIRE 497 static struct secacq *key_newacq (const struct secasindex *); 498 static struct secacq *key_getacq (const struct secasindex *); 499 static struct secacq *key_getacqbyseq (u_int32_t); 500 #endif 501 static struct secspacq *key_newspacq (const struct secpolicyindex *); 502 static struct secspacq *key_getspacq (const struct secpolicyindex *); 503 static int key_acquire2 (struct socket *, struct mbuf *, 504 const struct sadb_msghdr *); 505 static int key_register (struct socket *, struct mbuf *, 506 const struct sadb_msghdr *); 507 static int key_expire (struct secasvar *); 508 static int key_flush (struct socket *, struct mbuf *, 509 const struct sadb_msghdr *); 510 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 511 int *lenp, pid_t pid); 512 static int key_dump (struct socket *, struct mbuf *, 513 const struct sadb_msghdr *); 514 static int key_promisc (struct socket *, struct mbuf *, 515 const struct sadb_msghdr *); 516 static int key_senderror (struct socket *, struct mbuf *, int); 517 static int key_validate_ext (const struct sadb_ext *, int); 518 static int key_align (struct mbuf *, struct sadb_msghdr *); 519 #if 0 520 static const char *key_getfqdn (void); 521 static const char *key_getuserfqdn (void); 522 #endif 523 static void key_sa_chgstate (struct secasvar *, u_int8_t); 524 static inline void key_sp_dead (struct secpolicy *); 525 static void key_sp_unlink (struct secpolicy *sp); 526 527 static struct mbuf *key_alloc_mbuf (int); 528 struct callout key_timehandler_ch; 529 530 #define SA_ADDREF(p) do { \ 531 (p)->refcnt++; \ 532 IPSEC_ASSERT((p)->refcnt != 0, \ 533 ("SA refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 534 } while (0) 535 #define SA_DELREF(p) do { \ 536 IPSEC_ASSERT((p)->refcnt > 0, \ 537 ("SA refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 538 (p)->refcnt--; \ 539 } while (0) 540 541 #define SP_ADDREF(p) do { \ 542 (p)->refcnt++; \ 543 IPSEC_ASSERT((p)->refcnt != 0, \ 544 ("SP refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 545 } while (0) 546 #define SP_DELREF(p) do { \ 547 IPSEC_ASSERT((p)->refcnt > 0, \ 548 ("SP refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 549 (p)->refcnt--; \ 550 } while (0) 551 552 553 static inline void 554 key_sp_dead(struct secpolicy *sp) 555 { 556 557 /* mark the SP dead */ 558 sp->state = IPSEC_SPSTATE_DEAD; 559 } 560 561 static void 562 key_sp_unlink(struct secpolicy *sp) 563 { 564 565 /* remove from SP index */ 566 if (__LIST_CHAINED(sp)) { 567 LIST_REMOVE(sp, chain); 568 /* Release refcount held just for being on chain */ 569 KEY_FREESP(&sp); 570 } 571 } 572 573 574 /* 575 * Return 0 when there are known to be no SP's for the specified 576 * direction. Otherwise return 1. This is used by IPsec code 577 * to optimize performance. 578 */ 579 int 580 key_havesp(u_int dir) 581 { 582 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 583 LIST_FIRST(&sptree[dir]) != NULL : 1); 584 } 585 586 /* %%% IPsec policy management */ 587 /* 588 * allocating a SP for OUTBOUND or INBOUND packet. 589 * Must call key_freesp() later. 590 * OUT: NULL: not found 591 * others: found and return the pointer. 592 */ 593 struct secpolicy * 594 key_allocsp(const struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 595 { 596 struct secpolicy *sp; 597 int s; 598 599 IPSEC_ASSERT(spidx != NULL, ("key_allocsp: null spidx")); 600 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 601 ("key_allocsp: invalid direction %u", dir)); 602 603 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 604 printf("DP %s from %s:%u\n", __func__, where, tag)); 605 606 /* get a SP entry */ 607 s = splsoftnet(); /*called from softclock()*/ 608 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 609 printf("*** objects\n"); 610 kdebug_secpolicyindex(spidx)); 611 612 LIST_FOREACH(sp, &sptree[dir], chain) { 613 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 614 printf("*** in SPD\n"); 615 kdebug_secpolicyindex(&sp->spidx)); 616 617 if (sp->state == IPSEC_SPSTATE_DEAD) 618 continue; 619 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 620 goto found; 621 } 622 sp = NULL; 623 found: 624 if (sp) { 625 /* sanity check */ 626 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp"); 627 628 /* found a SPD entry */ 629 sp->lastused = time_uptime; 630 SP_ADDREF(sp); 631 } 632 splx(s); 633 634 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 635 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 636 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 637 return sp; 638 } 639 640 /* 641 * allocating a SP for OUTBOUND or INBOUND packet. 642 * Must call key_freesp() later. 643 * OUT: NULL: not found 644 * others: found and return the pointer. 645 */ 646 struct secpolicy * 647 key_allocsp2(u_int32_t spi, 648 const union sockaddr_union *dst, 649 u_int8_t proto, 650 u_int dir, 651 const char* where, int tag) 652 { 653 struct secpolicy *sp; 654 int s; 655 656 IPSEC_ASSERT(dst != NULL, ("key_allocsp2: null dst")); 657 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 658 ("key_allocsp2: invalid direction %u", dir)); 659 660 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 661 printf("DP %s from %s:%u\n", __func__, where, tag)); 662 663 /* get a SP entry */ 664 s = splsoftnet(); /*called from softclock()*/ 665 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 666 printf("*** objects\n"); 667 printf("spi %u proto %u dir %u\n", spi, proto, dir); 668 kdebug_sockaddr(&dst->sa)); 669 670 LIST_FOREACH(sp, &sptree[dir], chain) { 671 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 672 printf("*** in SPD\n"); 673 kdebug_secpolicyindex(&sp->spidx)); 674 675 if (sp->state == IPSEC_SPSTATE_DEAD) 676 continue; 677 /* compare simple values, then dst address */ 678 if (sp->spidx.ul_proto != proto) 679 continue; 680 /* NB: spi's must exist and match */ 681 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 682 continue; 683 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, PORT_STRICT) == 0) 684 goto found; 685 } 686 sp = NULL; 687 found: 688 if (sp) { 689 /* sanity check */ 690 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2"); 691 692 /* found a SPD entry */ 693 sp->lastused = time_uptime; 694 SP_ADDREF(sp); 695 } 696 splx(s); 697 698 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 699 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 700 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 701 return sp; 702 } 703 704 /* 705 * return a policy that matches this particular inbound packet. 706 * XXX slow 707 */ 708 struct secpolicy * 709 key_gettunnel(const struct sockaddr *osrc, 710 const struct sockaddr *odst, 711 const struct sockaddr *isrc, 712 const struct sockaddr *idst, 713 const char* where, int tag) 714 { 715 struct secpolicy *sp; 716 const int dir = IPSEC_DIR_INBOUND; 717 int s; 718 struct ipsecrequest *r1, *r2, *p; 719 struct secpolicyindex spidx; 720 721 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 722 printf("DP %s from %s:%u\n", __func__, where, tag)); 723 724 if (isrc->sa_family != idst->sa_family) { 725 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.", 726 isrc->sa_family, idst->sa_family)); 727 sp = NULL; 728 goto done; 729 } 730 731 s = splsoftnet(); /*called from softclock()*/ 732 LIST_FOREACH(sp, &sptree[dir], chain) { 733 if (sp->state == IPSEC_SPSTATE_DEAD) 734 continue; 735 736 r1 = r2 = NULL; 737 for (p = sp->req; p; p = p->next) { 738 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 739 continue; 740 741 r1 = r2; 742 r2 = p; 743 744 if (!r1) { 745 /* here we look at address matches only */ 746 spidx = sp->spidx; 747 if (isrc->sa_len > sizeof(spidx.src) || 748 idst->sa_len > sizeof(spidx.dst)) 749 continue; 750 memcpy(&spidx.src, isrc, isrc->sa_len); 751 memcpy(&spidx.dst, idst, idst->sa_len); 752 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 753 continue; 754 } else { 755 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, PORT_NONE) || 756 key_sockaddrcmp(&r1->saidx.dst.sa, idst, PORT_NONE)) 757 continue; 758 } 759 760 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, PORT_NONE) || 761 key_sockaddrcmp(&r2->saidx.dst.sa, odst, PORT_NONE)) 762 continue; 763 764 goto found; 765 } 766 } 767 sp = NULL; 768 found: 769 if (sp) { 770 sp->lastused = time_uptime; 771 SP_ADDREF(sp); 772 } 773 splx(s); 774 done: 775 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 776 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 777 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 778 return sp; 779 } 780 781 /* 782 * allocating an SA entry for an *OUTBOUND* packet. 783 * checking each request entries in SP, and acquire an SA if need. 784 * OUT: 0: there are valid requests. 785 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 786 */ 787 int 788 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 789 { 790 u_int level; 791 int error; 792 793 IPSEC_ASSERT(isr != NULL, ("key_checkrequest: null isr")); 794 IPSEC_ASSERT(saidx != NULL, ("key_checkrequest: null saidx")); 795 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 796 saidx->mode == IPSEC_MODE_TUNNEL, 797 ("key_checkrequest: unexpected policy %u", saidx->mode)); 798 799 /* get current level */ 800 level = ipsec_get_reqlevel(isr); 801 802 /* 803 * XXX guard against protocol callbacks from the crypto 804 * thread as they reference ipsecrequest.sav which we 805 * temporarily null out below. Need to rethink how we 806 * handle bundled SA's in the callback thread. 807 */ 808 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 809 #if 0 810 /* 811 * We do allocate new SA only if the state of SA in the holder is 812 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 813 */ 814 if (isr->sav != NULL) { 815 if (isr->sav->sah == NULL) 816 panic("key_checkrequest: sah is null"); 817 if (isr->sav == (struct secasvar *)LIST_FIRST( 818 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 819 KEY_FREESAV(&isr->sav); 820 isr->sav = NULL; 821 } 822 } 823 #else 824 /* 825 * we free any SA stashed in the IPsec request because a different 826 * SA may be involved each time this request is checked, either 827 * because new SAs are being configured, or this request is 828 * associated with an unconnected datagram socket, or this request 829 * is associated with a system default policy. 830 * 831 * The operation may have negative impact to performance. We may 832 * want to check cached SA carefully, rather than picking new SA 833 * every time. 834 */ 835 if (isr->sav != NULL) { 836 KEY_FREESAV(&isr->sav); 837 isr->sav = NULL; 838 } 839 #endif 840 841 /* 842 * new SA allocation if no SA found. 843 * key_allocsa_policy should allocate the oldest SA available. 844 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 845 */ 846 if (isr->sav == NULL) 847 isr->sav = key_allocsa_policy(saidx); 848 849 /* When there is SA. */ 850 if (isr->sav != NULL) { 851 if (isr->sav->state != SADB_SASTATE_MATURE && 852 isr->sav->state != SADB_SASTATE_DYING) 853 return EINVAL; 854 return 0; 855 } 856 857 /* there is no SA */ 858 error = key_acquire(saidx, isr->sp); 859 if (error != 0) { 860 /* XXX What should I do ? */ 861 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " 862 "from key_acquire.\n", error)); 863 return error; 864 } 865 866 if (level != IPSEC_LEVEL_REQUIRE) { 867 /* XXX sigh, the interface to this routine is botched */ 868 IPSEC_ASSERT(isr->sav == NULL, ("key_checkrequest: unexpected SA")); 869 return 0; 870 } else { 871 return ENOENT; 872 } 873 } 874 875 /* 876 * allocating a SA for policy entry from SAD. 877 * NOTE: searching SAD of aliving state. 878 * OUT: NULL: not found. 879 * others: found and return the pointer. 880 */ 881 static struct secasvar * 882 key_allocsa_policy(const struct secasindex *saidx) 883 { 884 struct secashead *sah; 885 struct secasvar *sav; 886 u_int stateidx, state; 887 const u_int *saorder_state_valid; 888 int arraysize; 889 890 LIST_FOREACH(sah, &sahtree, chain) { 891 if (sah->state == SADB_SASTATE_DEAD) 892 continue; 893 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) 894 goto found; 895 } 896 897 return NULL; 898 899 found: 900 901 /* 902 * search a valid state list for outbound packet. 903 * This search order is important. 904 */ 905 if (key_prefered_oldsa) { 906 saorder_state_valid = saorder_state_valid_prefer_old; 907 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 908 } else { 909 saorder_state_valid = saorder_state_valid_prefer_new; 910 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 911 } 912 913 /* search valid state */ 914 for (stateidx = 0; 915 stateidx < arraysize; 916 stateidx++) { 917 918 state = saorder_state_valid[stateidx]; 919 920 sav = key_do_allocsa_policy(sah, state); 921 if (sav != NULL) 922 return sav; 923 } 924 925 return NULL; 926 } 927 928 /* 929 * searching SAD with direction, protocol, mode and state. 930 * called by key_allocsa_policy(). 931 * OUT: 932 * NULL : not found 933 * others : found, pointer to a SA. 934 */ 935 static struct secasvar * 936 key_do_allocsa_policy(struct secashead *sah, u_int state) 937 { 938 struct secasvar *sav, *nextsav, *candidate, *d; 939 940 /* initilize */ 941 candidate = NULL; 942 943 for (sav = LIST_FIRST(&sah->savtree[state]); 944 sav != NULL; 945 sav = nextsav) { 946 947 nextsav = LIST_NEXT(sav, chain); 948 949 /* sanity check */ 950 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy"); 951 952 /* initialize */ 953 if (candidate == NULL) { 954 candidate = sav; 955 continue; 956 } 957 958 /* Which SA is the better ? */ 959 960 /* sanity check 2 */ 961 if (candidate->lft_c == NULL || sav->lft_c == NULL) 962 panic("key_do_allocsa_policy: " 963 "lifetime_current is NULL"); 964 965 /* What the best method is to compare ? */ 966 if (key_prefered_oldsa) { 967 if (candidate->lft_c->sadb_lifetime_addtime > 968 sav->lft_c->sadb_lifetime_addtime) { 969 candidate = sav; 970 } 971 continue; 972 /*NOTREACHED*/ 973 } 974 975 /* prefered new sa rather than old sa */ 976 if (candidate->lft_c->sadb_lifetime_addtime < 977 sav->lft_c->sadb_lifetime_addtime) { 978 d = candidate; 979 candidate = sav; 980 } else 981 d = sav; 982 983 /* 984 * prepared to delete the SA when there is more 985 * suitable candidate and the lifetime of the SA is not 986 * permanent. 987 */ 988 if (d->lft_c->sadb_lifetime_addtime != 0) { 989 struct mbuf *m, *result = 0; 990 uint8_t satype; 991 992 key_sa_chgstate(d, SADB_SASTATE_DEAD); 993 994 IPSEC_ASSERT(d->refcnt > 0, 995 ("key_do_allocsa_policy: bogus ref count")); 996 997 satype = key_proto2satype(d->sah->saidx.proto); 998 if (satype == 0) 999 goto msgfail; 1000 1001 m = key_setsadbmsg(SADB_DELETE, 0, 1002 satype, 0, 0, d->refcnt - 1); 1003 if (!m) 1004 goto msgfail; 1005 result = m; 1006 1007 /* set sadb_address for saidx's. */ 1008 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1009 &d->sah->saidx.src.sa, 1010 d->sah->saidx.src.sa.sa_len << 3, 1011 IPSEC_ULPROTO_ANY); 1012 if (!m) 1013 goto msgfail; 1014 m_cat(result, m); 1015 1016 /* set sadb_address for saidx's. */ 1017 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1018 &d->sah->saidx.src.sa, 1019 d->sah->saidx.src.sa.sa_len << 3, 1020 IPSEC_ULPROTO_ANY); 1021 if (!m) 1022 goto msgfail; 1023 m_cat(result, m); 1024 1025 /* create SA extension */ 1026 m = key_setsadbsa(d); 1027 if (!m) 1028 goto msgfail; 1029 m_cat(result, m); 1030 1031 if (result->m_len < sizeof(struct sadb_msg)) { 1032 result = m_pullup(result, 1033 sizeof(struct sadb_msg)); 1034 if (result == NULL) 1035 goto msgfail; 1036 } 1037 1038 result->m_pkthdr.len = 0; 1039 for (m = result; m; m = m->m_next) 1040 result->m_pkthdr.len += m->m_len; 1041 mtod(result, struct sadb_msg *)->sadb_msg_len = 1042 PFKEY_UNIT64(result->m_pkthdr.len); 1043 1044 key_sendup_mbuf(NULL, result, 1045 KEY_SENDUP_REGISTERED); 1046 result = 0; 1047 msgfail: 1048 if (result) 1049 m_freem(result); 1050 KEY_FREESAV(&d); 1051 } 1052 } 1053 1054 if (candidate) { 1055 SA_ADDREF(candidate); 1056 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1057 printf("DP %s cause refcnt++:%d SA:%p\n", __func__, 1058 candidate->refcnt, candidate)); 1059 } 1060 return candidate; 1061 } 1062 1063 /* 1064 * allocating a usable SA entry for a *INBOUND* packet. 1065 * Must call key_freesav() later. 1066 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1067 * NULL: not found, or error occurred. 1068 * 1069 * In the comparison, no source address is used--for RFC2401 conformance. 1070 * To quote, from section 4.1: 1071 * A security association is uniquely identified by a triple consisting 1072 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1073 * security protocol (AH or ESP) identifier. 1074 * Note that, however, we do need to keep source address in IPsec SA. 1075 * IKE specification and PF_KEY specification do assume that we 1076 * keep source address in IPsec SA. We see a tricky situation here. 1077 * 1078 * sport and dport are used for NAT-T. network order is always used. 1079 */ 1080 struct secasvar * 1081 key_allocsa( 1082 const union sockaddr_union *dst, 1083 u_int proto, 1084 u_int32_t spi, 1085 u_int16_t sport, 1086 u_int16_t dport, 1087 const char* where, int tag) 1088 { 1089 struct secashead *sah; 1090 struct secasvar *sav; 1091 u_int stateidx, state; 1092 const u_int *saorder_state_valid; 1093 int arraysize, chkport; 1094 int s; 1095 1096 int must_check_spi = 1; 1097 int must_check_alg = 0; 1098 u_int16_t cpi = 0; 1099 u_int8_t algo = 0; 1100 1101 if ((sport != 0) && (dport != 0)) 1102 chkport = PORT_STRICT; 1103 else 1104 chkport = PORT_NONE; 1105 1106 IPSEC_ASSERT(dst != NULL, ("key_allocsa: null dst address")); 1107 1108 /* 1109 * XXX IPCOMP case 1110 * We use cpi to define spi here. In the case where cpi <= 1111 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1112 * the real spi. In this case, don't check the spi but check the 1113 * algorithm 1114 */ 1115 1116 if (proto == IPPROTO_IPCOMP) { 1117 u_int32_t tmp; 1118 tmp = ntohl(spi); 1119 cpi = (u_int16_t) tmp; 1120 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1121 algo = (u_int8_t) cpi; 1122 must_check_spi = 0; 1123 must_check_alg = 1; 1124 } 1125 } 1126 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1127 printf("DP %s from %s:%u check_spi=%d, check_alg=%d\n", 1128 __func__, where, tag, must_check_spi, must_check_alg)); 1129 1130 1131 /* 1132 * searching SAD. 1133 * XXX: to be checked internal IP header somewhere. Also when 1134 * IPsec tunnel packet is received. But ESP tunnel mode is 1135 * encrypted so we can't check internal IP header. 1136 */ 1137 s = splsoftnet(); /*called from softclock()*/ 1138 if (key_prefered_oldsa) { 1139 saorder_state_valid = saorder_state_valid_prefer_old; 1140 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1141 } else { 1142 saorder_state_valid = saorder_state_valid_prefer_new; 1143 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1144 } 1145 LIST_FOREACH(sah, &sahtree, chain) { 1146 /* search valid state */ 1147 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1148 state = saorder_state_valid[stateidx]; 1149 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1150 KEYDEBUG(KEYDEBUG_MATCH, 1151 printf("try match spi %#x, %#x\n", 1152 ntohl(spi), ntohl(sav->spi))); 1153 /* sanity check */ 1154 KEY_CHKSASTATE(sav->state, state, "key_allocsav"); 1155 /* do not return entries w/ unusable state */ 1156 if (sav->state != SADB_SASTATE_MATURE && 1157 sav->state != SADB_SASTATE_DYING) { 1158 KEYDEBUG(KEYDEBUG_MATCH, 1159 printf("bad state %d\n", 1160 sav->state)); 1161 continue; 1162 } 1163 if (proto != sav->sah->saidx.proto) { 1164 KEYDEBUG(KEYDEBUG_MATCH, 1165 printf("proto fail %d != %d\n", 1166 proto, sav->sah->saidx.proto)); 1167 continue; 1168 } 1169 if (must_check_spi && spi != sav->spi) { 1170 KEYDEBUG(KEYDEBUG_MATCH, 1171 printf("spi fail %#x != %#x\n", 1172 ntohl(spi), ntohl(sav->spi))); 1173 continue; 1174 } 1175 /* XXX only on the ipcomp case */ 1176 if (must_check_alg && algo != sav->alg_comp) { 1177 KEYDEBUG(KEYDEBUG_MATCH, 1178 printf("algo fail %d != %d\n", 1179 algo, sav->alg_comp)); 1180 continue; 1181 } 1182 1183 #if 0 /* don't check src */ 1184 /* Fix port in src->sa */ 1185 1186 /* check src address */ 1187 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE) != 0) 1188 continue; 1189 #endif 1190 /* fix port of dst address XXX*/ 1191 key_porttosaddr(__UNCONST(dst), dport); 1192 /* check dst address */ 1193 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1194 continue; 1195 SA_ADDREF(sav); 1196 goto done; 1197 } 1198 } 1199 } 1200 sav = NULL; 1201 done: 1202 splx(s); 1203 1204 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1205 printf("DP %s return SA:%p; refcnt %u\n", __func__, 1206 sav, sav ? sav->refcnt : 0)); 1207 return sav; 1208 } 1209 1210 /* 1211 * Must be called after calling key_allocsp(). 1212 * For both the packet without socket and key_freeso(). 1213 */ 1214 void 1215 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1216 { 1217 struct secpolicy *sp = *spp; 1218 1219 IPSEC_ASSERT(sp != NULL, ("key_freesp: null sp")); 1220 1221 SP_DELREF(sp); 1222 1223 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1224 printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1225 __func__, sp, sp->id, where, tag, sp->refcnt)); 1226 1227 if (sp->refcnt == 0) { 1228 *spp = NULL; 1229 key_delsp(sp); 1230 } 1231 } 1232 1233 /* 1234 * Must be called after calling key_allocsp(). 1235 * For the packet with socket. 1236 */ 1237 void 1238 key_freeso(struct socket *so) 1239 { 1240 /* sanity check */ 1241 IPSEC_ASSERT(so != NULL, ("key_freeso: null so")); 1242 1243 switch (so->so_proto->pr_domain->dom_family) { 1244 #ifdef INET 1245 case PF_INET: 1246 { 1247 struct inpcb *pcb = sotoinpcb(so); 1248 1249 /* Does it have a PCB ? */ 1250 if (pcb == NULL) 1251 return; 1252 1253 struct inpcbpolicy *sp = pcb->inp_sp; 1254 key_freesp_so(&sp->sp_in); 1255 key_freesp_so(&sp->sp_out); 1256 } 1257 break; 1258 #endif 1259 #ifdef INET6 1260 case PF_INET6: 1261 { 1262 #ifdef HAVE_NRL_INPCB 1263 struct inpcb *pcb = sotoinpcb(so); 1264 struct inpcbpolicy *sp = pcb->inp_sp; 1265 1266 /* Does it have a PCB ? */ 1267 if (pcb == NULL) 1268 return; 1269 key_freesp_so(&sp->sp_in); 1270 key_freesp_so(&sp->sp_out); 1271 #else 1272 struct in6pcb *pcb = sotoin6pcb(so); 1273 1274 /* Does it have a PCB ? */ 1275 if (pcb == NULL) 1276 return; 1277 key_freesp_so(&pcb->in6p_sp->sp_in); 1278 key_freesp_so(&pcb->in6p_sp->sp_out); 1279 #endif 1280 } 1281 break; 1282 #endif /* INET6 */ 1283 default: 1284 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1285 so->so_proto->pr_domain->dom_family)); 1286 return; 1287 } 1288 } 1289 1290 static void 1291 key_freesp_so(struct secpolicy **sp) 1292 { 1293 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp")); 1294 1295 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1296 (*sp)->policy == IPSEC_POLICY_BYPASS) 1297 return; 1298 1299 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1300 ("key_freesp_so: invalid policy %u", (*sp)->policy)); 1301 KEY_FREESP(sp); 1302 } 1303 1304 /* 1305 * Must be called after calling key_allocsa(). 1306 * This function is called by key_freesp() to free some SA allocated 1307 * for a policy. 1308 */ 1309 void 1310 key_freesav(struct secasvar **psav, const char* where, int tag) 1311 { 1312 struct secasvar *sav = *psav; 1313 1314 IPSEC_ASSERT(sav != NULL, ("key_freesav: null sav")); 1315 1316 SA_DELREF(sav); 1317 1318 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1319 printf("DP %s SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1320 __func__, sav, (u_long)ntohl(sav->spi), where, tag, 1321 sav->refcnt)); 1322 1323 if (sav->refcnt == 0) { 1324 *psav = NULL; 1325 key_delsav(sav); 1326 } 1327 } 1328 1329 /* %%% SPD management */ 1330 /* 1331 * free security policy entry. 1332 */ 1333 static void 1334 key_delsp(struct secpolicy *sp) 1335 { 1336 int s; 1337 1338 IPSEC_ASSERT(sp != NULL, ("key_delsp: null sp")); 1339 1340 key_sp_dead(sp); 1341 1342 IPSEC_ASSERT(sp->refcnt == 0, 1343 ("key_delsp: SP with references deleted (refcnt %u)", 1344 sp->refcnt)); 1345 1346 s = splsoftnet(); /*called from softclock()*/ 1347 1348 { 1349 struct ipsecrequest *isr = sp->req, *nextisr; 1350 1351 while (isr != NULL) { 1352 if (isr->sav != NULL) { 1353 KEY_FREESAV(&isr->sav); 1354 isr->sav = NULL; 1355 } 1356 1357 nextisr = isr->next; 1358 KFREE(isr); 1359 isr = nextisr; 1360 } 1361 } 1362 1363 KFREE(sp); 1364 1365 splx(s); 1366 } 1367 1368 /* 1369 * search SPD 1370 * OUT: NULL : not found 1371 * others : found, pointer to a SP. 1372 */ 1373 static struct secpolicy * 1374 key_getsp(const struct secpolicyindex *spidx) 1375 { 1376 struct secpolicy *sp; 1377 1378 IPSEC_ASSERT(spidx != NULL, ("key_getsp: null spidx")); 1379 1380 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1381 if (sp->state == IPSEC_SPSTATE_DEAD) 1382 continue; 1383 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1384 SP_ADDREF(sp); 1385 return sp; 1386 } 1387 } 1388 1389 return NULL; 1390 } 1391 1392 /* 1393 * get SP by index. 1394 * OUT: NULL : not found 1395 * others : found, pointer to a SP. 1396 */ 1397 static struct secpolicy * 1398 key_getspbyid(u_int32_t id) 1399 { 1400 struct secpolicy *sp; 1401 1402 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1403 if (sp->state == IPSEC_SPSTATE_DEAD) 1404 continue; 1405 if (sp->id == id) { 1406 SP_ADDREF(sp); 1407 return sp; 1408 } 1409 } 1410 1411 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1412 if (sp->state == IPSEC_SPSTATE_DEAD) 1413 continue; 1414 if (sp->id == id) { 1415 SP_ADDREF(sp); 1416 return sp; 1417 } 1418 } 1419 1420 return NULL; 1421 } 1422 1423 struct secpolicy * 1424 key_newsp(const char* where, int tag) 1425 { 1426 struct secpolicy *newsp = NULL; 1427 1428 newsp = (struct secpolicy *) 1429 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); 1430 if (newsp) { 1431 newsp->refcnt = 1; 1432 newsp->req = NULL; 1433 } 1434 1435 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1436 printf("DP %s from %s:%u return SP:%p\n", __func__, 1437 where, tag, newsp)); 1438 return newsp; 1439 } 1440 1441 /* 1442 * create secpolicy structure from sadb_x_policy structure. 1443 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1444 * so must be set properly later. 1445 */ 1446 struct secpolicy * 1447 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1448 { 1449 struct secpolicy *newsp; 1450 1451 /* sanity check */ 1452 if (xpl0 == NULL) 1453 panic("key_msg2sp: NULL pointer was passed"); 1454 if (len < sizeof(*xpl0)) 1455 panic("key_msg2sp: invalid length"); 1456 if (len != PFKEY_EXTLEN(xpl0)) { 1457 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1458 *error = EINVAL; 1459 return NULL; 1460 } 1461 1462 if ((newsp = KEY_NEWSP()) == NULL) { 1463 *error = ENOBUFS; 1464 return NULL; 1465 } 1466 1467 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1468 newsp->policy = xpl0->sadb_x_policy_type; 1469 1470 /* check policy */ 1471 switch (xpl0->sadb_x_policy_type) { 1472 case IPSEC_POLICY_DISCARD: 1473 case IPSEC_POLICY_NONE: 1474 case IPSEC_POLICY_ENTRUST: 1475 case IPSEC_POLICY_BYPASS: 1476 newsp->req = NULL; 1477 break; 1478 1479 case IPSEC_POLICY_IPSEC: 1480 { 1481 int tlen; 1482 const struct sadb_x_ipsecrequest *xisr; 1483 uint16_t xisr_reqid; 1484 struct ipsecrequest **p_isr = &newsp->req; 1485 1486 /* validity check */ 1487 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1488 ipseclog((LOG_DEBUG, 1489 "key_msg2sp: Invalid msg length.\n")); 1490 KEY_FREESP(&newsp); 1491 *error = EINVAL; 1492 return NULL; 1493 } 1494 1495 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1496 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1497 1498 while (tlen > 0) { 1499 /* length check */ 1500 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1501 ipseclog((LOG_DEBUG, "key_msg2sp: " 1502 "invalid ipsecrequest length.\n")); 1503 KEY_FREESP(&newsp); 1504 *error = EINVAL; 1505 return NULL; 1506 } 1507 1508 /* allocate request buffer */ 1509 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); 1510 if ((*p_isr) == NULL) { 1511 ipseclog((LOG_DEBUG, 1512 "key_msg2sp: No more memory.\n")); 1513 KEY_FREESP(&newsp); 1514 *error = ENOBUFS; 1515 return NULL; 1516 } 1517 memset(*p_isr, 0, sizeof(**p_isr)); 1518 1519 /* set values */ 1520 (*p_isr)->next = NULL; 1521 1522 switch (xisr->sadb_x_ipsecrequest_proto) { 1523 case IPPROTO_ESP: 1524 case IPPROTO_AH: 1525 case IPPROTO_IPCOMP: 1526 break; 1527 default: 1528 ipseclog((LOG_DEBUG, 1529 "key_msg2sp: invalid proto type=%u\n", 1530 xisr->sadb_x_ipsecrequest_proto)); 1531 KEY_FREESP(&newsp); 1532 *error = EPROTONOSUPPORT; 1533 return NULL; 1534 } 1535 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1536 1537 switch (xisr->sadb_x_ipsecrequest_mode) { 1538 case IPSEC_MODE_TRANSPORT: 1539 case IPSEC_MODE_TUNNEL: 1540 break; 1541 case IPSEC_MODE_ANY: 1542 default: 1543 ipseclog((LOG_DEBUG, 1544 "key_msg2sp: invalid mode=%u\n", 1545 xisr->sadb_x_ipsecrequest_mode)); 1546 KEY_FREESP(&newsp); 1547 *error = EINVAL; 1548 return NULL; 1549 } 1550 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1551 1552 switch (xisr->sadb_x_ipsecrequest_level) { 1553 case IPSEC_LEVEL_DEFAULT: 1554 case IPSEC_LEVEL_USE: 1555 case IPSEC_LEVEL_REQUIRE: 1556 break; 1557 case IPSEC_LEVEL_UNIQUE: 1558 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1559 /* validity check */ 1560 /* 1561 * If range violation of reqid, kernel will 1562 * update it, don't refuse it. 1563 */ 1564 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1565 ipseclog((LOG_DEBUG, 1566 "key_msg2sp: reqid=%d range " 1567 "violation, updated by kernel.\n", 1568 xisr_reqid)); 1569 xisr_reqid = 0; 1570 } 1571 1572 /* allocate new reqid id if reqid is zero. */ 1573 if (xisr_reqid == 0) { 1574 u_int16_t reqid; 1575 if ((reqid = key_newreqid()) == 0) { 1576 KEY_FREESP(&newsp); 1577 *error = ENOBUFS; 1578 return NULL; 1579 } 1580 (*p_isr)->saidx.reqid = reqid; 1581 } else { 1582 /* set it for manual keying. */ 1583 (*p_isr)->saidx.reqid = xisr_reqid; 1584 } 1585 break; 1586 1587 default: 1588 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1589 xisr->sadb_x_ipsecrequest_level)); 1590 KEY_FREESP(&newsp); 1591 *error = EINVAL; 1592 return NULL; 1593 } 1594 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1595 1596 /* set IP addresses if there */ 1597 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1598 const struct sockaddr *paddr; 1599 1600 paddr = (const struct sockaddr *)(xisr + 1); 1601 1602 /* validity check */ 1603 if (paddr->sa_len 1604 > sizeof((*p_isr)->saidx.src)) { 1605 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1606 "address length.\n")); 1607 KEY_FREESP(&newsp); 1608 *error = EINVAL; 1609 return NULL; 1610 } 1611 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1612 1613 paddr = (const struct sockaddr *)((const char *)paddr 1614 + paddr->sa_len); 1615 1616 /* validity check */ 1617 if (paddr->sa_len 1618 > sizeof((*p_isr)->saidx.dst)) { 1619 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1620 "address length.\n")); 1621 KEY_FREESP(&newsp); 1622 *error = EINVAL; 1623 return NULL; 1624 } 1625 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1626 } 1627 1628 (*p_isr)->sav = NULL; 1629 (*p_isr)->sp = newsp; 1630 1631 /* initialization for the next. */ 1632 p_isr = &(*p_isr)->next; 1633 tlen -= xisr->sadb_x_ipsecrequest_len; 1634 1635 /* validity check */ 1636 if (tlen < 0) { 1637 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1638 KEY_FREESP(&newsp); 1639 *error = EINVAL; 1640 return NULL; 1641 } 1642 1643 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr 1644 + xisr->sadb_x_ipsecrequest_len); 1645 } 1646 } 1647 break; 1648 default: 1649 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1650 KEY_FREESP(&newsp); 1651 *error = EINVAL; 1652 return NULL; 1653 } 1654 1655 *error = 0; 1656 return newsp; 1657 } 1658 1659 static u_int16_t 1660 key_newreqid(void) 1661 { 1662 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1663 1664 auto_reqid = (auto_reqid == 0xffff 1665 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1666 1667 /* XXX should be unique check */ 1668 1669 return auto_reqid; 1670 } 1671 1672 /* 1673 * copy secpolicy struct to sadb_x_policy structure indicated. 1674 */ 1675 struct mbuf * 1676 key_sp2msg(const struct secpolicy *sp) 1677 { 1678 struct sadb_x_policy *xpl; 1679 int tlen; 1680 char *p; 1681 struct mbuf *m; 1682 1683 /* sanity check. */ 1684 if (sp == NULL) 1685 panic("key_sp2msg: NULL pointer was passed"); 1686 1687 tlen = key_getspreqmsglen(sp); 1688 1689 m = key_alloc_mbuf(tlen); 1690 if (!m || m->m_next) { /*XXX*/ 1691 if (m) 1692 m_freem(m); 1693 return NULL; 1694 } 1695 1696 m->m_len = tlen; 1697 m->m_next = NULL; 1698 xpl = mtod(m, struct sadb_x_policy *); 1699 memset(xpl, 0, tlen); 1700 1701 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1702 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1703 xpl->sadb_x_policy_type = sp->policy; 1704 xpl->sadb_x_policy_dir = sp->spidx.dir; 1705 xpl->sadb_x_policy_id = sp->id; 1706 p = (char *)xpl + sizeof(*xpl); 1707 1708 /* if is the policy for ipsec ? */ 1709 if (sp->policy == IPSEC_POLICY_IPSEC) { 1710 struct sadb_x_ipsecrequest *xisr; 1711 struct ipsecrequest *isr; 1712 1713 for (isr = sp->req; isr != NULL; isr = isr->next) { 1714 1715 xisr = (struct sadb_x_ipsecrequest *)p; 1716 1717 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1718 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1719 xisr->sadb_x_ipsecrequest_level = isr->level; 1720 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1721 1722 p += sizeof(*xisr); 1723 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1724 p += isr->saidx.src.sa.sa_len; 1725 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1726 p += isr->saidx.src.sa.sa_len; 1727 1728 xisr->sadb_x_ipsecrequest_len = 1729 PFKEY_ALIGN8(sizeof(*xisr) 1730 + isr->saidx.src.sa.sa_len 1731 + isr->saidx.dst.sa.sa_len); 1732 } 1733 } 1734 1735 return m; 1736 } 1737 1738 /* m will not be freed nor modified */ 1739 static struct mbuf * 1740 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1741 int ndeep, int nitem, ...) 1742 { 1743 va_list ap; 1744 int idx; 1745 int i; 1746 struct mbuf *result = NULL, *n; 1747 int len; 1748 1749 if (m == NULL || mhp == NULL) 1750 panic("null pointer passed to key_gather"); 1751 1752 va_start(ap, nitem); 1753 for (i = 0; i < nitem; i++) { 1754 idx = va_arg(ap, int); 1755 if (idx < 0 || idx > SADB_EXT_MAX) 1756 goto fail; 1757 /* don't attempt to pull empty extension */ 1758 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1759 continue; 1760 if (idx != SADB_EXT_RESERVED && 1761 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1762 continue; 1763 1764 if (idx == SADB_EXT_RESERVED) { 1765 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1766 #ifdef DIAGNOSTIC 1767 if (len > MHLEN) 1768 panic("assumption failed"); 1769 #endif 1770 MGETHDR(n, M_DONTWAIT, MT_DATA); 1771 if (!n) 1772 goto fail; 1773 n->m_len = len; 1774 n->m_next = NULL; 1775 m_copydata(m, 0, sizeof(struct sadb_msg), 1776 mtod(n, void *)); 1777 } else if (i < ndeep) { 1778 len = mhp->extlen[idx]; 1779 n = key_alloc_mbuf(len); 1780 if (!n || n->m_next) { /*XXX*/ 1781 if (n) 1782 m_freem(n); 1783 goto fail; 1784 } 1785 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1786 mtod(n, void *)); 1787 } else { 1788 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1789 M_DONTWAIT); 1790 } 1791 if (n == NULL) 1792 goto fail; 1793 1794 if (result) 1795 m_cat(result, n); 1796 else 1797 result = n; 1798 } 1799 va_end(ap); 1800 1801 if (result && (result->m_flags & M_PKTHDR) != 0) { 1802 result->m_pkthdr.len = 0; 1803 for (n = result; n; n = n->m_next) 1804 result->m_pkthdr.len += n->m_len; 1805 } 1806 1807 return result; 1808 1809 fail: 1810 va_end(ap); 1811 m_freem(result); 1812 return NULL; 1813 } 1814 1815 /* 1816 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1817 * add an entry to SP database, when received 1818 * <base, address(SD), (lifetime(H),) policy> 1819 * from the user(?). 1820 * Adding to SP database, 1821 * and send 1822 * <base, address(SD), (lifetime(H),) policy> 1823 * to the socket which was send. 1824 * 1825 * SPDADD set a unique policy entry. 1826 * SPDSETIDX like SPDADD without a part of policy requests. 1827 * SPDUPDATE replace a unique policy entry. 1828 * 1829 * m will always be freed. 1830 */ 1831 static int 1832 key_spdadd(struct socket *so, struct mbuf *m, 1833 const struct sadb_msghdr *mhp) 1834 { 1835 const struct sadb_address *src0, *dst0; 1836 const struct sadb_x_policy *xpl0; 1837 struct sadb_x_policy *xpl; 1838 const struct sadb_lifetime *lft = NULL; 1839 struct secpolicyindex spidx; 1840 struct secpolicy *newsp; 1841 int error; 1842 1843 /* sanity check */ 1844 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 1845 panic("key_spdadd: NULL pointer is passed"); 1846 1847 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1848 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1849 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1850 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1851 return key_senderror(so, m, EINVAL); 1852 } 1853 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1854 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1855 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1856 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1857 return key_senderror(so, m, EINVAL); 1858 } 1859 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1860 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1861 < sizeof(struct sadb_lifetime)) { 1862 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1863 return key_senderror(so, m, EINVAL); 1864 } 1865 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1866 } 1867 1868 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1869 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1870 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1871 1872 /* make secindex */ 1873 /* XXX boundary check against sa_len */ 1874 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1875 src0 + 1, 1876 dst0 + 1, 1877 src0->sadb_address_prefixlen, 1878 dst0->sadb_address_prefixlen, 1879 src0->sadb_address_proto, 1880 &spidx); 1881 1882 /* checking the direciton. */ 1883 switch (xpl0->sadb_x_policy_dir) { 1884 case IPSEC_DIR_INBOUND: 1885 case IPSEC_DIR_OUTBOUND: 1886 break; 1887 default: 1888 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1889 mhp->msg->sadb_msg_errno = EINVAL; 1890 return 0; 1891 } 1892 1893 /* check policy */ 1894 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1895 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1896 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1897 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1898 return key_senderror(so, m, EINVAL); 1899 } 1900 1901 /* policy requests are mandatory when action is ipsec. */ 1902 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1903 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1904 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1905 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1906 return key_senderror(so, m, EINVAL); 1907 } 1908 1909 /* 1910 * checking there is SP already or not. 1911 * SPDUPDATE doesn't depend on whether there is a SP or not. 1912 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1913 * then error. 1914 */ 1915 newsp = key_getsp(&spidx); 1916 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1917 if (newsp) { 1918 key_sp_dead(newsp); 1919 key_sp_unlink(newsp); /* XXX jrs ordering */ 1920 KEY_FREESP(&newsp); 1921 newsp = NULL; 1922 } 1923 } else { 1924 if (newsp != NULL) { 1925 KEY_FREESP(&newsp); 1926 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1927 return key_senderror(so, m, EEXIST); 1928 } 1929 } 1930 1931 /* allocation new SP entry */ 1932 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1933 return key_senderror(so, m, error); 1934 } 1935 1936 if ((newsp->id = key_getnewspid()) == 0) { 1937 KFREE(newsp); 1938 return key_senderror(so, m, ENOBUFS); 1939 } 1940 1941 /* XXX boundary check against sa_len */ 1942 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1943 src0 + 1, 1944 dst0 + 1, 1945 src0->sadb_address_prefixlen, 1946 dst0->sadb_address_prefixlen, 1947 src0->sadb_address_proto, 1948 &newsp->spidx); 1949 1950 /* sanity check on addr pair */ 1951 if (((const struct sockaddr *)(src0 + 1))->sa_family != 1952 ((const struct sockaddr *)(dst0+ 1))->sa_family) { 1953 KFREE(newsp); 1954 return key_senderror(so, m, EINVAL); 1955 } 1956 if (((const struct sockaddr *)(src0 + 1))->sa_len != 1957 ((const struct sockaddr *)(dst0+ 1))->sa_len) { 1958 KFREE(newsp); 1959 return key_senderror(so, m, EINVAL); 1960 } 1961 1962 newsp->created = time_uptime; 1963 newsp->lastused = newsp->created; 1964 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1965 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1966 1967 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1968 newsp->state = IPSEC_SPSTATE_ALIVE; 1969 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1970 1971 /* delete the entry in spacqtree */ 1972 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1973 struct secspacq *spacq; 1974 if ((spacq = key_getspacq(&spidx)) != NULL) { 1975 /* reset counter in order to deletion by timehandler. */ 1976 spacq->created = time_uptime; 1977 spacq->count = 0; 1978 } 1979 } 1980 1981 #if defined(__NetBSD__) 1982 /* Invalidate all cached SPD pointers in the PCBs. */ 1983 ipsec_invalpcbcacheall(); 1984 1985 #if defined(GATEWAY) 1986 /* Invalidate the ipflow cache, as well. */ 1987 ipflow_invalidate_all(0); 1988 #ifdef INET6 1989 ip6flow_invalidate_all(0); 1990 #endif /* INET6 */ 1991 #endif /* GATEWAY */ 1992 #endif /* __NetBSD__ */ 1993 1994 { 1995 struct mbuf *n, *mpolicy; 1996 struct sadb_msg *newmsg; 1997 int off; 1998 1999 /* create new sadb_msg to reply. */ 2000 if (lft) { 2001 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 2002 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 2003 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2004 } else { 2005 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2006 SADB_X_EXT_POLICY, 2007 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2008 } 2009 if (!n) 2010 return key_senderror(so, m, ENOBUFS); 2011 2012 if (n->m_len < sizeof(*newmsg)) { 2013 n = m_pullup(n, sizeof(*newmsg)); 2014 if (!n) 2015 return key_senderror(so, m, ENOBUFS); 2016 } 2017 newmsg = mtod(n, struct sadb_msg *); 2018 newmsg->sadb_msg_errno = 0; 2019 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2020 2021 off = 0; 2022 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2023 sizeof(*xpl), &off); 2024 if (mpolicy == NULL) { 2025 /* n is already freed */ 2026 return key_senderror(so, m, ENOBUFS); 2027 } 2028 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2029 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2030 m_freem(n); 2031 return key_senderror(so, m, EINVAL); 2032 } 2033 xpl->sadb_x_policy_id = newsp->id; 2034 2035 m_freem(m); 2036 key_update_used(); 2037 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2038 } 2039 } 2040 2041 /* 2042 * get new policy id. 2043 * OUT: 2044 * 0: failure. 2045 * others: success. 2046 */ 2047 static u_int32_t 2048 key_getnewspid(void) 2049 { 2050 u_int32_t newid = 0; 2051 int count = key_spi_trycnt; /* XXX */ 2052 struct secpolicy *sp; 2053 2054 /* when requesting to allocate spi ranged */ 2055 while (count--) { 2056 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2057 2058 if ((sp = key_getspbyid(newid)) == NULL) 2059 break; 2060 2061 KEY_FREESP(&sp); 2062 } 2063 2064 if (count == 0 || newid == 0) { 2065 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2066 return 0; 2067 } 2068 2069 return newid; 2070 } 2071 2072 /* 2073 * SADB_SPDDELETE processing 2074 * receive 2075 * <base, address(SD), policy(*)> 2076 * from the user(?), and set SADB_SASTATE_DEAD, 2077 * and send, 2078 * <base, address(SD), policy(*)> 2079 * to the ikmpd. 2080 * policy(*) including direction of policy. 2081 * 2082 * m will always be freed. 2083 */ 2084 static int 2085 key_spddelete(struct socket *so, struct mbuf *m, 2086 const struct sadb_msghdr *mhp) 2087 { 2088 struct sadb_address *src0, *dst0; 2089 struct sadb_x_policy *xpl0; 2090 struct secpolicyindex spidx; 2091 struct secpolicy *sp; 2092 2093 /* sanity check */ 2094 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2095 panic("key_spddelete: NULL pointer is passed"); 2096 2097 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2098 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2099 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2100 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2101 return key_senderror(so, m, EINVAL); 2102 } 2103 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2104 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2105 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2106 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2107 return key_senderror(so, m, EINVAL); 2108 } 2109 2110 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2111 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2112 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2113 2114 /* make secindex */ 2115 /* XXX boundary check against sa_len */ 2116 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2117 src0 + 1, 2118 dst0 + 1, 2119 src0->sadb_address_prefixlen, 2120 dst0->sadb_address_prefixlen, 2121 src0->sadb_address_proto, 2122 &spidx); 2123 2124 /* checking the direciton. */ 2125 switch (xpl0->sadb_x_policy_dir) { 2126 case IPSEC_DIR_INBOUND: 2127 case IPSEC_DIR_OUTBOUND: 2128 break; 2129 default: 2130 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2131 return key_senderror(so, m, EINVAL); 2132 } 2133 2134 /* Is there SP in SPD ? */ 2135 if ((sp = key_getsp(&spidx)) == NULL) { 2136 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2137 return key_senderror(so, m, EINVAL); 2138 } 2139 2140 /* save policy id to buffer to be returned. */ 2141 xpl0->sadb_x_policy_id = sp->id; 2142 2143 key_sp_dead(sp); 2144 key_sp_unlink(sp); /* XXX jrs ordering */ 2145 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2146 2147 #if defined(__NetBSD__) 2148 /* Invalidate all cached SPD pointers in the PCBs. */ 2149 ipsec_invalpcbcacheall(); 2150 2151 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2152 #endif /* __NetBSD__ */ 2153 2154 { 2155 struct mbuf *n; 2156 struct sadb_msg *newmsg; 2157 2158 /* create new sadb_msg to reply. */ 2159 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2160 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2161 if (!n) 2162 return key_senderror(so, m, ENOBUFS); 2163 2164 newmsg = mtod(n, struct sadb_msg *); 2165 newmsg->sadb_msg_errno = 0; 2166 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2167 2168 m_freem(m); 2169 key_update_used(); 2170 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2171 } 2172 } 2173 2174 /* 2175 * SADB_SPDDELETE2 processing 2176 * receive 2177 * <base, policy(*)> 2178 * from the user(?), and set SADB_SASTATE_DEAD, 2179 * and send, 2180 * <base, policy(*)> 2181 * to the ikmpd. 2182 * policy(*) including direction of policy. 2183 * 2184 * m will always be freed. 2185 */ 2186 static int 2187 key_spddelete2(struct socket *so, struct mbuf *m, 2188 const struct sadb_msghdr *mhp) 2189 { 2190 u_int32_t id; 2191 struct secpolicy *sp; 2192 2193 /* sanity check */ 2194 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2195 panic("key_spddelete2: NULL pointer is passed"); 2196 2197 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2198 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2199 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2200 key_senderror(so, m, EINVAL); 2201 return 0; 2202 } 2203 2204 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2205 2206 /* Is there SP in SPD ? */ 2207 if ((sp = key_getspbyid(id)) == NULL) { 2208 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2209 return key_senderror(so, m, EINVAL); 2210 } 2211 2212 key_sp_dead(sp); 2213 key_sp_unlink(sp); /* XXX jrs ordering */ 2214 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2215 sp = NULL; 2216 2217 #if defined(__NetBSD__) 2218 /* Invalidate all cached SPD pointers in the PCBs. */ 2219 ipsec_invalpcbcacheall(); 2220 2221 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2222 #endif /* __NetBSD__ */ 2223 2224 { 2225 struct mbuf *n, *nn; 2226 struct sadb_msg *newmsg; 2227 int off, len; 2228 2229 /* create new sadb_msg to reply. */ 2230 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2231 2232 if (len > MCLBYTES) 2233 return key_senderror(so, m, ENOBUFS); 2234 MGETHDR(n, M_DONTWAIT, MT_DATA); 2235 if (n && len > MHLEN) { 2236 MCLGET(n, M_DONTWAIT); 2237 if ((n->m_flags & M_EXT) == 0) { 2238 m_freem(n); 2239 n = NULL; 2240 } 2241 } 2242 if (!n) 2243 return key_senderror(so, m, ENOBUFS); 2244 2245 n->m_len = len; 2246 n->m_next = NULL; 2247 off = 0; 2248 2249 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2250 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2251 2252 #ifdef DIAGNOSTIC 2253 if (off != len) 2254 panic("length inconsistency in key_spddelete2"); 2255 #endif 2256 2257 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2258 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2259 if (!n->m_next) { 2260 m_freem(n); 2261 return key_senderror(so, m, ENOBUFS); 2262 } 2263 2264 n->m_pkthdr.len = 0; 2265 for (nn = n; nn; nn = nn->m_next) 2266 n->m_pkthdr.len += nn->m_len; 2267 2268 newmsg = mtod(n, struct sadb_msg *); 2269 newmsg->sadb_msg_errno = 0; 2270 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2271 2272 m_freem(m); 2273 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2274 } 2275 } 2276 2277 /* 2278 * SADB_X_GET processing 2279 * receive 2280 * <base, policy(*)> 2281 * from the user(?), 2282 * and send, 2283 * <base, address(SD), policy> 2284 * to the ikmpd. 2285 * policy(*) including direction of policy. 2286 * 2287 * m will always be freed. 2288 */ 2289 static int 2290 key_spdget(struct socket *so, struct mbuf *m, 2291 const struct sadb_msghdr *mhp) 2292 { 2293 u_int32_t id; 2294 struct secpolicy *sp; 2295 struct mbuf *n; 2296 2297 /* sanity check */ 2298 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2299 panic("key_spdget: NULL pointer is passed"); 2300 2301 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2302 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2303 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2304 return key_senderror(so, m, EINVAL); 2305 } 2306 2307 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2308 2309 /* Is there SP in SPD ? */ 2310 if ((sp = key_getspbyid(id)) == NULL) { 2311 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2312 return key_senderror(so, m, ENOENT); 2313 } 2314 2315 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2316 mhp->msg->sadb_msg_pid); 2317 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2318 if (n != NULL) { 2319 m_freem(m); 2320 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2321 } else 2322 return key_senderror(so, m, ENOBUFS); 2323 } 2324 2325 /* 2326 * SADB_X_SPDACQUIRE processing. 2327 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2328 * send 2329 * <base, policy(*)> 2330 * to KMD, and expect to receive 2331 * <base> with SADB_X_SPDACQUIRE if error occurred, 2332 * or 2333 * <base, policy> 2334 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2335 * policy(*) is without policy requests. 2336 * 2337 * 0 : succeed 2338 * others: error number 2339 */ 2340 int 2341 key_spdacquire(const struct secpolicy *sp) 2342 { 2343 struct mbuf *result = NULL, *m; 2344 struct secspacq *newspacq; 2345 int error; 2346 2347 /* sanity check */ 2348 if (sp == NULL) 2349 panic("key_spdacquire: NULL pointer is passed"); 2350 if (sp->req != NULL) 2351 panic("key_spdacquire: called but there is request"); 2352 if (sp->policy != IPSEC_POLICY_IPSEC) 2353 panic("key_spdacquire: policy mismathed. IPsec is expected"); 2354 2355 /* Get an entry to check whether sent message or not. */ 2356 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2357 if (key_blockacq_count < newspacq->count) { 2358 /* reset counter and do send message. */ 2359 newspacq->count = 0; 2360 } else { 2361 /* increment counter and do nothing. */ 2362 newspacq->count++; 2363 return 0; 2364 } 2365 } else { 2366 /* make new entry for blocking to send SADB_ACQUIRE. */ 2367 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2368 return ENOBUFS; 2369 2370 /* add to acqtree */ 2371 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2372 } 2373 2374 /* create new sadb_msg to reply. */ 2375 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2376 if (!m) { 2377 error = ENOBUFS; 2378 goto fail; 2379 } 2380 result = m; 2381 2382 result->m_pkthdr.len = 0; 2383 for (m = result; m; m = m->m_next) 2384 result->m_pkthdr.len += m->m_len; 2385 2386 mtod(result, struct sadb_msg *)->sadb_msg_len = 2387 PFKEY_UNIT64(result->m_pkthdr.len); 2388 2389 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2390 2391 fail: 2392 if (result) 2393 m_freem(result); 2394 return error; 2395 } 2396 2397 /* 2398 * SADB_SPDFLUSH processing 2399 * receive 2400 * <base> 2401 * from the user, and free all entries in secpctree. 2402 * and send, 2403 * <base> 2404 * to the user. 2405 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2406 * 2407 * m will always be freed. 2408 */ 2409 static int 2410 key_spdflush(struct socket *so, struct mbuf *m, 2411 const struct sadb_msghdr *mhp) 2412 { 2413 struct sadb_msg *newmsg; 2414 struct secpolicy *sp; 2415 u_int dir; 2416 2417 /* sanity check */ 2418 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2419 panic("key_spdflush: NULL pointer is passed"); 2420 2421 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2422 return key_senderror(so, m, EINVAL); 2423 2424 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2425 struct secpolicy * nextsp; 2426 for (sp = LIST_FIRST(&sptree[dir]); 2427 sp != NULL; 2428 sp = nextsp) { 2429 2430 nextsp = LIST_NEXT(sp, chain); 2431 if (sp->state == IPSEC_SPSTATE_DEAD) 2432 continue; 2433 key_sp_dead(sp); 2434 key_sp_unlink(sp); 2435 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2436 continue; 2437 } 2438 } 2439 2440 #if defined(__NetBSD__) 2441 /* Invalidate all cached SPD pointers in the PCBs. */ 2442 ipsec_invalpcbcacheall(); 2443 2444 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2445 #endif /* __NetBSD__ */ 2446 2447 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2448 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2449 return key_senderror(so, m, ENOBUFS); 2450 } 2451 2452 if (m->m_next) 2453 m_freem(m->m_next); 2454 m->m_next = NULL; 2455 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2456 newmsg = mtod(m, struct sadb_msg *); 2457 newmsg->sadb_msg_errno = 0; 2458 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2459 2460 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2461 } 2462 2463 static struct sockaddr key_src = { 2464 .sa_len = 2, 2465 .sa_family = PF_KEY, 2466 }; 2467 2468 static struct mbuf * 2469 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2470 { 2471 struct secpolicy *sp; 2472 int cnt; 2473 u_int dir; 2474 struct mbuf *m, *n, *prev; 2475 int totlen; 2476 2477 *lenp = 0; 2478 2479 /* search SPD entry and get buffer size. */ 2480 cnt = 0; 2481 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2482 LIST_FOREACH(sp, &sptree[dir], chain) { 2483 cnt++; 2484 } 2485 } 2486 2487 if (cnt == 0) { 2488 *errorp = ENOENT; 2489 return (NULL); 2490 } 2491 2492 m = NULL; 2493 prev = m; 2494 totlen = 0; 2495 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2496 LIST_FOREACH(sp, &sptree[dir], chain) { 2497 --cnt; 2498 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2499 2500 if (!n) { 2501 *errorp = ENOBUFS; 2502 if (m) m_freem(m); 2503 return (NULL); 2504 } 2505 2506 totlen += n->m_pkthdr.len; 2507 if (!m) { 2508 m = n; 2509 } else { 2510 prev->m_nextpkt = n; 2511 } 2512 prev = n; 2513 } 2514 } 2515 2516 *lenp = totlen; 2517 *errorp = 0; 2518 return (m); 2519 } 2520 2521 /* 2522 * SADB_SPDDUMP processing 2523 * receive 2524 * <base> 2525 * from the user, and dump all SP leaves 2526 * and send, 2527 * <base> ..... 2528 * to the ikmpd. 2529 * 2530 * m will always be freed. 2531 */ 2532 static int 2533 key_spddump(struct socket *so, struct mbuf *m0, 2534 const struct sadb_msghdr *mhp) 2535 { 2536 struct mbuf *n; 2537 int error, len; 2538 int ok, s; 2539 pid_t pid; 2540 2541 /* sanity check */ 2542 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 2543 panic("key_spddump: NULL pointer is passed"); 2544 2545 2546 pid = mhp->msg->sadb_msg_pid; 2547 /* 2548 * If the requestor has insufficient socket-buffer space 2549 * for the entire chain, nobody gets any response to the DUMP. 2550 * XXX For now, only the requestor ever gets anything. 2551 * Moreover, if the requestor has any space at all, they receive 2552 * the entire chain, otherwise the request is refused with ENOBUFS. 2553 */ 2554 if (sbspace(&so->so_rcv) <= 0) { 2555 return key_senderror(so, m0, ENOBUFS); 2556 } 2557 2558 s = splsoftnet(); 2559 n = key_setspddump_chain(&error, &len, pid); 2560 splx(s); 2561 2562 if (n == NULL) { 2563 return key_senderror(so, m0, ENOENT); 2564 } 2565 { 2566 uint64_t *ps = PFKEY_STAT_GETREF(); 2567 ps[PFKEY_STAT_IN_TOTAL]++; 2568 ps[PFKEY_STAT_IN_BYTES] += len; 2569 PFKEY_STAT_PUTREF(); 2570 } 2571 2572 /* 2573 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2574 * The requestor receives either the entire chain, or an 2575 * error message with ENOBUFS. 2576 */ 2577 2578 /* 2579 * sbappendchainwith record takes the chain of entries, one 2580 * packet-record per SPD entry, prepends the key_src sockaddr 2581 * to each packet-record, links the sockaddr mbufs into a new 2582 * list of records, then appends the entire resulting 2583 * list to the requesting socket. 2584 */ 2585 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2586 n, SB_PRIO_ONESHOT_OVERFLOW); 2587 2588 if (!ok) { 2589 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2590 m_freem(n); 2591 return key_senderror(so, m0, ENOBUFS); 2592 } 2593 2594 m_freem(m0); 2595 return error; 2596 } 2597 2598 /* 2599 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2600 */ 2601 static int 2602 key_nat_map(struct socket *so, struct mbuf *m, 2603 const struct sadb_msghdr *mhp) 2604 { 2605 struct sadb_x_nat_t_type *type; 2606 struct sadb_x_nat_t_port *sport; 2607 struct sadb_x_nat_t_port *dport; 2608 struct sadb_address *iaddr, *raddr; 2609 struct sadb_x_nat_t_frag *frag; 2610 2611 /* sanity check */ 2612 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2613 panic("key_nat_map: NULL pointer is passed."); 2614 2615 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2616 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2617 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2618 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2619 return key_senderror(so, m, EINVAL); 2620 } 2621 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2622 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2623 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2624 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2625 return key_senderror(so, m, EINVAL); 2626 } 2627 2628 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2629 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2630 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2631 return key_senderror(so, m, EINVAL); 2632 } 2633 2634 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2635 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2636 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2637 return key_senderror(so, m, EINVAL); 2638 } 2639 2640 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2641 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2642 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2643 return key_senderror(so, m, EINVAL); 2644 } 2645 2646 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2647 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2648 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2649 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2650 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2651 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2652 2653 /* 2654 * XXX handle that, it should also contain a SA, or anything 2655 * that enable to update the SA information. 2656 */ 2657 2658 return 0; 2659 } 2660 2661 static struct mbuf * 2662 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2663 { 2664 struct mbuf *result = NULL, *m; 2665 2666 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2667 if (!m) 2668 goto fail; 2669 result = m; 2670 2671 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2672 &sp->spidx.src.sa, sp->spidx.prefs, 2673 sp->spidx.ul_proto); 2674 if (!m) 2675 goto fail; 2676 m_cat(result, m); 2677 2678 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2679 &sp->spidx.dst.sa, sp->spidx.prefd, 2680 sp->spidx.ul_proto); 2681 if (!m) 2682 goto fail; 2683 m_cat(result, m); 2684 2685 m = key_sp2msg(sp); 2686 if (!m) 2687 goto fail; 2688 m_cat(result, m); 2689 2690 if ((result->m_flags & M_PKTHDR) == 0) 2691 goto fail; 2692 2693 if (result->m_len < sizeof(struct sadb_msg)) { 2694 result = m_pullup(result, sizeof(struct sadb_msg)); 2695 if (result == NULL) 2696 goto fail; 2697 } 2698 2699 result->m_pkthdr.len = 0; 2700 for (m = result; m; m = m->m_next) 2701 result->m_pkthdr.len += m->m_len; 2702 2703 mtod(result, struct sadb_msg *)->sadb_msg_len = 2704 PFKEY_UNIT64(result->m_pkthdr.len); 2705 2706 return result; 2707 2708 fail: 2709 m_freem(result); 2710 return NULL; 2711 } 2712 2713 /* 2714 * get PFKEY message length for security policy and request. 2715 */ 2716 static u_int 2717 key_getspreqmsglen(const struct secpolicy *sp) 2718 { 2719 u_int tlen; 2720 2721 tlen = sizeof(struct sadb_x_policy); 2722 2723 /* if is the policy for ipsec ? */ 2724 if (sp->policy != IPSEC_POLICY_IPSEC) 2725 return tlen; 2726 2727 /* get length of ipsec requests */ 2728 { 2729 const struct ipsecrequest *isr; 2730 int len; 2731 2732 for (isr = sp->req; isr != NULL; isr = isr->next) { 2733 len = sizeof(struct sadb_x_ipsecrequest) 2734 + isr->saidx.src.sa.sa_len 2735 + isr->saidx.dst.sa.sa_len; 2736 2737 tlen += PFKEY_ALIGN8(len); 2738 } 2739 } 2740 2741 return tlen; 2742 } 2743 2744 /* 2745 * SADB_SPDEXPIRE processing 2746 * send 2747 * <base, address(SD), lifetime(CH), policy> 2748 * to KMD by PF_KEY. 2749 * 2750 * OUT: 0 : succeed 2751 * others : error number 2752 */ 2753 static int 2754 key_spdexpire(struct secpolicy *sp) 2755 { 2756 int s; 2757 struct mbuf *result = NULL, *m; 2758 int len; 2759 int error = -1; 2760 struct sadb_lifetime *lt; 2761 2762 /* XXX: Why do we lock ? */ 2763 s = splsoftnet(); /*called from softclock()*/ 2764 2765 /* sanity check */ 2766 if (sp == NULL) 2767 panic("key_spdexpire: NULL pointer is passed"); 2768 2769 /* set msg header */ 2770 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2771 if (!m) { 2772 error = ENOBUFS; 2773 goto fail; 2774 } 2775 result = m; 2776 2777 /* create lifetime extension (current and hard) */ 2778 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2779 m = key_alloc_mbuf(len); 2780 if (!m || m->m_next) { /*XXX*/ 2781 if (m) 2782 m_freem(m); 2783 error = ENOBUFS; 2784 goto fail; 2785 } 2786 memset(mtod(m, void *), 0, len); 2787 lt = mtod(m, struct sadb_lifetime *); 2788 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2789 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2790 lt->sadb_lifetime_allocations = 0; 2791 lt->sadb_lifetime_bytes = 0; 2792 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2793 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2794 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2795 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2796 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2797 lt->sadb_lifetime_allocations = 0; 2798 lt->sadb_lifetime_bytes = 0; 2799 lt->sadb_lifetime_addtime = sp->lifetime; 2800 lt->sadb_lifetime_usetime = sp->validtime; 2801 m_cat(result, m); 2802 2803 /* set sadb_address for source */ 2804 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2805 &sp->spidx.src.sa, 2806 sp->spidx.prefs, sp->spidx.ul_proto); 2807 if (!m) { 2808 error = ENOBUFS; 2809 goto fail; 2810 } 2811 m_cat(result, m); 2812 2813 /* set sadb_address for destination */ 2814 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2815 &sp->spidx.dst.sa, 2816 sp->spidx.prefd, sp->spidx.ul_proto); 2817 if (!m) { 2818 error = ENOBUFS; 2819 goto fail; 2820 } 2821 m_cat(result, m); 2822 2823 /* set secpolicy */ 2824 m = key_sp2msg(sp); 2825 if (!m) { 2826 error = ENOBUFS; 2827 goto fail; 2828 } 2829 m_cat(result, m); 2830 2831 if ((result->m_flags & M_PKTHDR) == 0) { 2832 error = EINVAL; 2833 goto fail; 2834 } 2835 2836 if (result->m_len < sizeof(struct sadb_msg)) { 2837 result = m_pullup(result, sizeof(struct sadb_msg)); 2838 if (result == NULL) { 2839 error = ENOBUFS; 2840 goto fail; 2841 } 2842 } 2843 2844 result->m_pkthdr.len = 0; 2845 for (m = result; m; m = m->m_next) 2846 result->m_pkthdr.len += m->m_len; 2847 2848 mtod(result, struct sadb_msg *)->sadb_msg_len = 2849 PFKEY_UNIT64(result->m_pkthdr.len); 2850 2851 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2852 2853 fail: 2854 if (result) 2855 m_freem(result); 2856 splx(s); 2857 return error; 2858 } 2859 2860 /* %%% SAD management */ 2861 /* 2862 * allocating a memory for new SA head, and copy from the values of mhp. 2863 * OUT: NULL : failure due to the lack of memory. 2864 * others : pointer to new SA head. 2865 */ 2866 static struct secashead * 2867 key_newsah(const struct secasindex *saidx) 2868 { 2869 struct secashead *newsah; 2870 2871 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx")); 2872 2873 newsah = (struct secashead *) 2874 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2875 if (newsah != NULL) { 2876 int i; 2877 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2878 LIST_INIT(&newsah->savtree[i]); 2879 newsah->saidx = *saidx; 2880 2881 /* add to saidxtree */ 2882 newsah->state = SADB_SASTATE_MATURE; 2883 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2884 } 2885 return(newsah); 2886 } 2887 2888 /* 2889 * delete SA index and all SA registerd. 2890 */ 2891 static void 2892 key_delsah(struct secashead *sah) 2893 { 2894 struct secasvar *sav, *nextsav; 2895 u_int stateidx, state; 2896 int s; 2897 int zombie = 0; 2898 2899 /* sanity check */ 2900 if (sah == NULL) 2901 panic("key_delsah: NULL pointer is passed"); 2902 2903 s = splsoftnet(); /*called from softclock()*/ 2904 2905 /* searching all SA registerd in the secindex. */ 2906 for (stateidx = 0; 2907 stateidx < _ARRAYLEN(saorder_state_any); 2908 stateidx++) { 2909 2910 state = saorder_state_any[stateidx]; 2911 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2912 sav != NULL; 2913 sav = nextsav) { 2914 2915 nextsav = LIST_NEXT(sav, chain); 2916 2917 if (sav->refcnt == 0) { 2918 /* sanity check */ 2919 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2920 KEY_FREESAV(&sav); 2921 } else { 2922 /* give up to delete this sa */ 2923 zombie++; 2924 } 2925 } 2926 } 2927 2928 /* don't delete sah only if there are savs. */ 2929 if (zombie) { 2930 splx(s); 2931 return; 2932 } 2933 2934 rtcache_free(&sah->sa_route); 2935 2936 /* remove from tree of SA index */ 2937 if (__LIST_CHAINED(sah)) 2938 LIST_REMOVE(sah, chain); 2939 2940 KFREE(sah); 2941 2942 splx(s); 2943 return; 2944 } 2945 2946 /* 2947 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2948 * and copy the values of mhp into new buffer. 2949 * When SAD message type is GETSPI: 2950 * to set sequence number from acq_seq++, 2951 * to set zero to SPI. 2952 * not to call key_setsava(). 2953 * OUT: NULL : fail 2954 * others : pointer to new secasvar. 2955 * 2956 * does not modify mbuf. does not free mbuf on error. 2957 */ 2958 static struct secasvar * 2959 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2960 struct secashead *sah, int *errp, 2961 const char* where, int tag) 2962 { 2963 struct secasvar *newsav; 2964 const struct sadb_sa *xsa; 2965 2966 /* sanity check */ 2967 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) 2968 panic("key_newsa: NULL pointer is passed"); 2969 2970 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2971 if (newsav == NULL) { 2972 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2973 *errp = ENOBUFS; 2974 goto done; 2975 } 2976 memset(newsav, 0, sizeof(struct secasvar)); 2977 2978 switch (mhp->msg->sadb_msg_type) { 2979 case SADB_GETSPI: 2980 newsav->spi = 0; 2981 2982 #ifdef IPSEC_DOSEQCHECK 2983 /* sync sequence number */ 2984 if (mhp->msg->sadb_msg_seq == 0) 2985 newsav->seq = 2986 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2987 else 2988 #endif 2989 newsav->seq = mhp->msg->sadb_msg_seq; 2990 break; 2991 2992 case SADB_ADD: 2993 /* sanity check */ 2994 if (mhp->ext[SADB_EXT_SA] == NULL) { 2995 KFREE(newsav), newsav = NULL; 2996 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2997 *errp = EINVAL; 2998 goto done; 2999 } 3000 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3001 newsav->spi = xsa->sadb_sa_spi; 3002 newsav->seq = mhp->msg->sadb_msg_seq; 3003 break; 3004 default: 3005 KFREE(newsav), newsav = NULL; 3006 *errp = EINVAL; 3007 goto done; 3008 } 3009 3010 /* copy sav values */ 3011 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 3012 *errp = key_setsaval(newsav, m, mhp); 3013 if (*errp) { 3014 KFREE(newsav), newsav = NULL; 3015 goto done; 3016 } 3017 } 3018 3019 /* reset created */ 3020 newsav->created = time_uptime; 3021 newsav->pid = mhp->msg->sadb_msg_pid; 3022 3023 /* add to satree */ 3024 newsav->sah = sah; 3025 newsav->refcnt = 1; 3026 newsav->state = SADB_SASTATE_LARVAL; 3027 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 3028 secasvar, chain); 3029 done: 3030 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3031 printf("DP %s from %s:%u return SP:%p\n", __func__, 3032 where, tag, newsav)); 3033 3034 return newsav; 3035 } 3036 3037 /* 3038 * free() SA variable entry. 3039 */ 3040 static void 3041 key_delsav(struct secasvar *sav) 3042 { 3043 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav")); 3044 IPSEC_ASSERT(sav->refcnt == 0, 3045 ("key_delsav: reference count %u > 0", sav->refcnt)); 3046 3047 /* remove from SA header */ 3048 if (__LIST_CHAINED(sav)) 3049 LIST_REMOVE(sav, chain); 3050 3051 /* 3052 * Cleanup xform state. Note that zeroize'ing causes the 3053 * keys to be cleared; otherwise we must do it ourself. 3054 */ 3055 if (sav->tdb_xform != NULL) { 3056 sav->tdb_xform->xf_zeroize(sav); 3057 sav->tdb_xform = NULL; 3058 } else { 3059 if (sav->key_auth != NULL) 3060 explicit_memset(_KEYBUF(sav->key_auth), 0, 3061 _KEYLEN(sav->key_auth)); 3062 if (sav->key_enc != NULL) 3063 explicit_memset(_KEYBUF(sav->key_enc), 0, 3064 _KEYLEN(sav->key_enc)); 3065 } 3066 if (sav->key_auth != NULL) { 3067 KFREE(sav->key_auth); 3068 sav->key_auth = NULL; 3069 } 3070 if (sav->key_enc != NULL) { 3071 KFREE(sav->key_enc); 3072 sav->key_enc = NULL; 3073 } 3074 if (sav->replay != NULL) { 3075 KFREE(sav->replay); 3076 sav->replay = NULL; 3077 } 3078 if (sav->lft_c != NULL) { 3079 KFREE(sav->lft_c); 3080 sav->lft_c = NULL; 3081 } 3082 if (sav->lft_h != NULL) { 3083 KFREE(sav->lft_h); 3084 sav->lft_h = NULL; 3085 } 3086 if (sav->lft_s != NULL) { 3087 KFREE(sav->lft_s); 3088 sav->lft_s = NULL; 3089 } 3090 3091 KFREE(sav); 3092 3093 return; 3094 } 3095 3096 /* 3097 * search SAD. 3098 * OUT: 3099 * NULL : not found 3100 * others : found, pointer to a SA. 3101 */ 3102 static struct secashead * 3103 key_getsah(const struct secasindex *saidx) 3104 { 3105 struct secashead *sah; 3106 3107 LIST_FOREACH(sah, &sahtree, chain) { 3108 if (sah->state == SADB_SASTATE_DEAD) 3109 continue; 3110 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3111 return sah; 3112 } 3113 3114 return NULL; 3115 } 3116 3117 /* 3118 * check not to be duplicated SPI. 3119 * NOTE: this function is too slow due to searching all SAD. 3120 * OUT: 3121 * NULL : not found 3122 * others : found, pointer to a SA. 3123 */ 3124 static struct secasvar * 3125 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3126 { 3127 struct secashead *sah; 3128 struct secasvar *sav; 3129 3130 /* check address family */ 3131 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3132 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3133 return NULL; 3134 } 3135 3136 /* check all SAD */ 3137 LIST_FOREACH(sah, &sahtree, chain) { 3138 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3139 continue; 3140 sav = key_getsavbyspi(sah, spi); 3141 if (sav != NULL) 3142 return sav; 3143 } 3144 3145 return NULL; 3146 } 3147 3148 /* 3149 * search SAD litmited alive SA, protocol, SPI. 3150 * OUT: 3151 * NULL : not found 3152 * others : found, pointer to a SA. 3153 */ 3154 static struct secasvar * 3155 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3156 { 3157 struct secasvar *sav; 3158 u_int stateidx, state; 3159 3160 /* search all status */ 3161 for (stateidx = 0; 3162 stateidx < _ARRAYLEN(saorder_state_alive); 3163 stateidx++) { 3164 3165 state = saorder_state_alive[stateidx]; 3166 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3167 3168 /* sanity check */ 3169 if (sav->state != state) { 3170 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3171 "invalid sav->state (queue: %d SA: %d)\n", 3172 state, sav->state)); 3173 continue; 3174 } 3175 3176 if (sav->spi == spi) 3177 return sav; 3178 } 3179 } 3180 3181 return NULL; 3182 } 3183 3184 /* 3185 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3186 * You must update these if need. 3187 * OUT: 0: success. 3188 * !0: failure. 3189 * 3190 * does not modify mbuf. does not free mbuf on error. 3191 */ 3192 static int 3193 key_setsaval(struct secasvar *sav, struct mbuf *m, 3194 const struct sadb_msghdr *mhp) 3195 { 3196 int error = 0; 3197 3198 /* sanity check */ 3199 if (m == NULL || mhp == NULL || mhp->msg == NULL) 3200 panic("key_setsaval: NULL pointer is passed"); 3201 3202 /* initialization */ 3203 sav->replay = NULL; 3204 sav->key_auth = NULL; 3205 sav->key_enc = NULL; 3206 sav->lft_c = NULL; 3207 sav->lft_h = NULL; 3208 sav->lft_s = NULL; 3209 sav->tdb_xform = NULL; /* transform */ 3210 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3211 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3212 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3213 sav->natt_type = 0; 3214 sav->esp_frag = 0; 3215 3216 /* SA */ 3217 if (mhp->ext[SADB_EXT_SA] != NULL) { 3218 const struct sadb_sa *sa0; 3219 3220 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3221 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3222 error = EINVAL; 3223 goto fail; 3224 } 3225 3226 sav->alg_auth = sa0->sadb_sa_auth; 3227 sav->alg_enc = sa0->sadb_sa_encrypt; 3228 sav->flags = sa0->sadb_sa_flags; 3229 3230 /* replay window */ 3231 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3232 sav->replay = (struct secreplay *) 3233 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3234 if (sav->replay == NULL) { 3235 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3236 error = ENOBUFS; 3237 goto fail; 3238 } 3239 if (sa0->sadb_sa_replay != 0) 3240 sav->replay->bitmap = (char*)(sav->replay+1); 3241 sav->replay->wsize = sa0->sadb_sa_replay; 3242 } 3243 } 3244 3245 /* Authentication keys */ 3246 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3247 const struct sadb_key *key0; 3248 int len; 3249 3250 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3251 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3252 3253 error = 0; 3254 if (len < sizeof(*key0)) { 3255 error = EINVAL; 3256 goto fail; 3257 } 3258 switch (mhp->msg->sadb_msg_satype) { 3259 case SADB_SATYPE_AH: 3260 case SADB_SATYPE_ESP: 3261 case SADB_X_SATYPE_TCPSIGNATURE: 3262 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3263 sav->alg_auth != SADB_X_AALG_NULL) 3264 error = EINVAL; 3265 break; 3266 case SADB_X_SATYPE_IPCOMP: 3267 default: 3268 error = EINVAL; 3269 break; 3270 } 3271 if (error) { 3272 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3273 goto fail; 3274 } 3275 3276 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3277 if (sav->key_auth == NULL) { 3278 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3279 error = ENOBUFS; 3280 goto fail; 3281 } 3282 } 3283 3284 /* Encryption key */ 3285 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3286 const struct sadb_key *key0; 3287 int len; 3288 3289 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3290 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3291 3292 error = 0; 3293 if (len < sizeof(*key0)) { 3294 error = EINVAL; 3295 goto fail; 3296 } 3297 switch (mhp->msg->sadb_msg_satype) { 3298 case SADB_SATYPE_ESP: 3299 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3300 sav->alg_enc != SADB_EALG_NULL) { 3301 error = EINVAL; 3302 break; 3303 } 3304 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3305 if (sav->key_enc == NULL) { 3306 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3307 error = ENOBUFS; 3308 goto fail; 3309 } 3310 break; 3311 case SADB_X_SATYPE_IPCOMP: 3312 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3313 error = EINVAL; 3314 sav->key_enc = NULL; /*just in case*/ 3315 break; 3316 case SADB_SATYPE_AH: 3317 case SADB_X_SATYPE_TCPSIGNATURE: 3318 default: 3319 error = EINVAL; 3320 break; 3321 } 3322 if (error) { 3323 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3324 goto fail; 3325 } 3326 } 3327 3328 /* set iv */ 3329 sav->ivlen = 0; 3330 3331 switch (mhp->msg->sadb_msg_satype) { 3332 case SADB_SATYPE_AH: 3333 error = xform_init(sav, XF_AH); 3334 break; 3335 case SADB_SATYPE_ESP: 3336 error = xform_init(sav, XF_ESP); 3337 break; 3338 case SADB_X_SATYPE_IPCOMP: 3339 error = xform_init(sav, XF_IPCOMP); 3340 break; 3341 case SADB_X_SATYPE_TCPSIGNATURE: 3342 error = xform_init(sav, XF_TCPSIGNATURE); 3343 break; 3344 } 3345 if (error) { 3346 ipseclog((LOG_DEBUG, 3347 "key_setsaval: unable to initialize SA type %u.\n", 3348 mhp->msg->sadb_msg_satype)); 3349 goto fail; 3350 } 3351 3352 /* reset created */ 3353 sav->created = time_uptime; 3354 3355 /* make lifetime for CURRENT */ 3356 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3357 sizeof(struct sadb_lifetime)); 3358 if (sav->lft_c == NULL) { 3359 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3360 error = ENOBUFS; 3361 goto fail; 3362 } 3363 3364 sav->lft_c->sadb_lifetime_len = 3365 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3366 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3367 sav->lft_c->sadb_lifetime_allocations = 0; 3368 sav->lft_c->sadb_lifetime_bytes = 0; 3369 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3370 sav->lft_c->sadb_lifetime_usetime = 0; 3371 3372 /* lifetimes for HARD and SOFT */ 3373 { 3374 const struct sadb_lifetime *lft0; 3375 3376 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3377 if (lft0 != NULL) { 3378 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3379 error = EINVAL; 3380 goto fail; 3381 } 3382 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3383 sizeof(*lft0)); 3384 if (sav->lft_h == NULL) { 3385 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3386 error = ENOBUFS; 3387 goto fail; 3388 } 3389 /* to be initialize ? */ 3390 } 3391 3392 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3393 if (lft0 != NULL) { 3394 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3395 error = EINVAL; 3396 goto fail; 3397 } 3398 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3399 sizeof(*lft0)); 3400 if (sav->lft_s == NULL) { 3401 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3402 error = ENOBUFS; 3403 goto fail; 3404 } 3405 /* to be initialize ? */ 3406 } 3407 } 3408 3409 return 0; 3410 3411 fail: 3412 /* initialization */ 3413 if (sav->replay != NULL) { 3414 KFREE(sav->replay); 3415 sav->replay = NULL; 3416 } 3417 if (sav->key_auth != NULL) { 3418 KFREE(sav->key_auth); 3419 sav->key_auth = NULL; 3420 } 3421 if (sav->key_enc != NULL) { 3422 KFREE(sav->key_enc); 3423 sav->key_enc = NULL; 3424 } 3425 if (sav->lft_c != NULL) { 3426 KFREE(sav->lft_c); 3427 sav->lft_c = NULL; 3428 } 3429 if (sav->lft_h != NULL) { 3430 KFREE(sav->lft_h); 3431 sav->lft_h = NULL; 3432 } 3433 if (sav->lft_s != NULL) { 3434 KFREE(sav->lft_s); 3435 sav->lft_s = NULL; 3436 } 3437 3438 return error; 3439 } 3440 3441 /* 3442 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3443 * OUT: 0: valid 3444 * other: errno 3445 */ 3446 static int 3447 key_mature(struct secasvar *sav) 3448 { 3449 int error; 3450 3451 /* check SPI value */ 3452 switch (sav->sah->saidx.proto) { 3453 case IPPROTO_ESP: 3454 case IPPROTO_AH: 3455 if (ntohl(sav->spi) <= 255) { 3456 ipseclog((LOG_DEBUG, 3457 "key_mature: illegal range of SPI %u.\n", 3458 (u_int32_t)ntohl(sav->spi))); 3459 return EINVAL; 3460 } 3461 break; 3462 } 3463 3464 /* check satype */ 3465 switch (sav->sah->saidx.proto) { 3466 case IPPROTO_ESP: 3467 /* check flags */ 3468 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3469 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3470 ipseclog((LOG_DEBUG, "key_mature: " 3471 "invalid flag (derived) given to old-esp.\n")); 3472 return EINVAL; 3473 } 3474 error = xform_init(sav, XF_ESP); 3475 break; 3476 case IPPROTO_AH: 3477 /* check flags */ 3478 if (sav->flags & SADB_X_EXT_DERIV) { 3479 ipseclog((LOG_DEBUG, "key_mature: " 3480 "invalid flag (derived) given to AH SA.\n")); 3481 return EINVAL; 3482 } 3483 if (sav->alg_enc != SADB_EALG_NONE) { 3484 ipseclog((LOG_DEBUG, "key_mature: " 3485 "protocol and algorithm mismated.\n")); 3486 return(EINVAL); 3487 } 3488 error = xform_init(sav, XF_AH); 3489 break; 3490 case IPPROTO_IPCOMP: 3491 if (sav->alg_auth != SADB_AALG_NONE) { 3492 ipseclog((LOG_DEBUG, "key_mature: " 3493 "protocol and algorithm mismated.\n")); 3494 return(EINVAL); 3495 } 3496 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3497 && ntohl(sav->spi) >= 0x10000) { 3498 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3499 return(EINVAL); 3500 } 3501 error = xform_init(sav, XF_IPCOMP); 3502 break; 3503 case IPPROTO_TCP: 3504 if (sav->alg_enc != SADB_EALG_NONE) { 3505 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3506 "mismated.\n", __func__)); 3507 return(EINVAL); 3508 } 3509 error = xform_init(sav, XF_TCPSIGNATURE); 3510 break; 3511 default: 3512 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3513 error = EPROTONOSUPPORT; 3514 break; 3515 } 3516 if (error == 0) 3517 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3518 return (error); 3519 } 3520 3521 /* 3522 * subroutine for SADB_GET and SADB_DUMP. 3523 */ 3524 static struct mbuf * 3525 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3526 u_int32_t seq, u_int32_t pid) 3527 { 3528 struct mbuf *result = NULL, *tres = NULL, *m; 3529 int l = 0; 3530 int i; 3531 void *p; 3532 struct sadb_lifetime lt; 3533 int dumporder[] = { 3534 SADB_EXT_SA, SADB_X_EXT_SA2, 3535 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3536 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3537 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3538 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3539 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3540 SADB_X_EXT_NAT_T_TYPE, 3541 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3542 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3543 SADB_X_EXT_NAT_T_FRAG, 3544 3545 }; 3546 3547 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3548 if (m == NULL) 3549 goto fail; 3550 result = m; 3551 3552 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3553 m = NULL; 3554 p = NULL; 3555 switch (dumporder[i]) { 3556 case SADB_EXT_SA: 3557 m = key_setsadbsa(sav); 3558 break; 3559 3560 case SADB_X_EXT_SA2: 3561 m = key_setsadbxsa2(sav->sah->saidx.mode, 3562 sav->replay ? sav->replay->count : 0, 3563 sav->sah->saidx.reqid); 3564 break; 3565 3566 case SADB_EXT_ADDRESS_SRC: 3567 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3568 &sav->sah->saidx.src.sa, 3569 FULLMASK, IPSEC_ULPROTO_ANY); 3570 break; 3571 3572 case SADB_EXT_ADDRESS_DST: 3573 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3574 &sav->sah->saidx.dst.sa, 3575 FULLMASK, IPSEC_ULPROTO_ANY); 3576 break; 3577 3578 case SADB_EXT_KEY_AUTH: 3579 if (!sav->key_auth) 3580 continue; 3581 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3582 p = sav->key_auth; 3583 break; 3584 3585 case SADB_EXT_KEY_ENCRYPT: 3586 if (!sav->key_enc) 3587 continue; 3588 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3589 p = sav->key_enc; 3590 break; 3591 3592 case SADB_EXT_LIFETIME_CURRENT: 3593 if (!sav->lft_c) 3594 continue; 3595 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3596 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3597 lt.sadb_lifetime_addtime += time_second - time_uptime; 3598 lt.sadb_lifetime_usetime += time_second - time_uptime; 3599 p = < 3600 break; 3601 3602 case SADB_EXT_LIFETIME_HARD: 3603 if (!sav->lft_h) 3604 continue; 3605 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3606 p = sav->lft_h; 3607 break; 3608 3609 case SADB_EXT_LIFETIME_SOFT: 3610 if (!sav->lft_s) 3611 continue; 3612 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3613 p = sav->lft_s; 3614 break; 3615 3616 case SADB_X_EXT_NAT_T_TYPE: 3617 m = key_setsadbxtype(sav->natt_type); 3618 break; 3619 3620 case SADB_X_EXT_NAT_T_DPORT: 3621 if (sav->natt_type == 0) 3622 continue; 3623 m = key_setsadbxport( 3624 key_portfromsaddr(&sav->sah->saidx.dst), 3625 SADB_X_EXT_NAT_T_DPORT); 3626 break; 3627 3628 case SADB_X_EXT_NAT_T_SPORT: 3629 if (sav->natt_type == 0) 3630 continue; 3631 m = key_setsadbxport( 3632 key_portfromsaddr(&sav->sah->saidx.src), 3633 SADB_X_EXT_NAT_T_SPORT); 3634 break; 3635 3636 case SADB_X_EXT_NAT_T_FRAG: 3637 /* don't send frag info if not set */ 3638 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3639 continue; 3640 m = key_setsadbxfrag(sav->esp_frag); 3641 break; 3642 3643 case SADB_X_EXT_NAT_T_OAI: 3644 case SADB_X_EXT_NAT_T_OAR: 3645 continue; 3646 3647 case SADB_EXT_ADDRESS_PROXY: 3648 case SADB_EXT_IDENTITY_SRC: 3649 case SADB_EXT_IDENTITY_DST: 3650 /* XXX: should we brought from SPD ? */ 3651 case SADB_EXT_SENSITIVITY: 3652 default: 3653 continue; 3654 } 3655 3656 KASSERT(!(m && p)); 3657 if (!m && !p) 3658 goto fail; 3659 if (p && tres) { 3660 M_PREPEND(tres, l, M_DONTWAIT); 3661 if (!tres) 3662 goto fail; 3663 memcpy(mtod(tres, void *), p, l); 3664 continue; 3665 } 3666 if (p) { 3667 m = key_alloc_mbuf(l); 3668 if (!m) 3669 goto fail; 3670 m_copyback(m, 0, l, p); 3671 } 3672 3673 if (tres) 3674 m_cat(m, tres); 3675 tres = m; 3676 } 3677 3678 m_cat(result, tres); 3679 tres = NULL; /* avoid free on error below */ 3680 3681 if (result->m_len < sizeof(struct sadb_msg)) { 3682 result = m_pullup(result, sizeof(struct sadb_msg)); 3683 if (result == NULL) 3684 goto fail; 3685 } 3686 3687 result->m_pkthdr.len = 0; 3688 for (m = result; m; m = m->m_next) 3689 result->m_pkthdr.len += m->m_len; 3690 3691 mtod(result, struct sadb_msg *)->sadb_msg_len = 3692 PFKEY_UNIT64(result->m_pkthdr.len); 3693 3694 return result; 3695 3696 fail: 3697 m_freem(result); 3698 m_freem(tres); 3699 return NULL; 3700 } 3701 3702 3703 /* 3704 * set a type in sadb_x_nat_t_type 3705 */ 3706 static struct mbuf * 3707 key_setsadbxtype(u_int16_t type) 3708 { 3709 struct mbuf *m; 3710 size_t len; 3711 struct sadb_x_nat_t_type *p; 3712 3713 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3714 3715 m = key_alloc_mbuf(len); 3716 if (!m || m->m_next) { /*XXX*/ 3717 if (m) 3718 m_freem(m); 3719 return NULL; 3720 } 3721 3722 p = mtod(m, struct sadb_x_nat_t_type *); 3723 3724 memset(p, 0, len); 3725 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3726 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3727 p->sadb_x_nat_t_type_type = type; 3728 3729 return m; 3730 } 3731 /* 3732 * set a port in sadb_x_nat_t_port. port is in network order 3733 */ 3734 static struct mbuf * 3735 key_setsadbxport(u_int16_t port, u_int16_t type) 3736 { 3737 struct mbuf *m; 3738 size_t len; 3739 struct sadb_x_nat_t_port *p; 3740 3741 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3742 3743 m = key_alloc_mbuf(len); 3744 if (!m || m->m_next) { /*XXX*/ 3745 if (m) 3746 m_freem(m); 3747 return NULL; 3748 } 3749 3750 p = mtod(m, struct sadb_x_nat_t_port *); 3751 3752 memset(p, 0, len); 3753 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3754 p->sadb_x_nat_t_port_exttype = type; 3755 p->sadb_x_nat_t_port_port = port; 3756 3757 return m; 3758 } 3759 3760 /* 3761 * set fragmentation info in sadb_x_nat_t_frag 3762 */ 3763 static struct mbuf * 3764 key_setsadbxfrag(u_int16_t flen) 3765 { 3766 struct mbuf *m; 3767 size_t len; 3768 struct sadb_x_nat_t_frag *p; 3769 3770 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3771 3772 m = key_alloc_mbuf(len); 3773 if (!m || m->m_next) { /*XXX*/ 3774 if (m) 3775 m_freem(m); 3776 return NULL; 3777 } 3778 3779 p = mtod(m, struct sadb_x_nat_t_frag *); 3780 3781 memset(p, 0, len); 3782 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3783 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3784 p->sadb_x_nat_t_frag_fraglen = flen; 3785 3786 return m; 3787 } 3788 3789 /* 3790 * Get port from sockaddr, port is in network order 3791 */ 3792 u_int16_t 3793 key_portfromsaddr(const union sockaddr_union *saddr) 3794 { 3795 u_int16_t port; 3796 3797 switch (saddr->sa.sa_family) { 3798 case AF_INET: { 3799 port = saddr->sin.sin_port; 3800 break; 3801 } 3802 #ifdef INET6 3803 case AF_INET6: { 3804 port = saddr->sin6.sin6_port; 3805 break; 3806 } 3807 #endif 3808 default: 3809 printf("%s: unexpected address family\n", __func__); 3810 port = 0; 3811 break; 3812 } 3813 3814 return port; 3815 } 3816 3817 3818 /* 3819 * Set port is struct sockaddr. port is in network order 3820 */ 3821 static void 3822 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3823 { 3824 switch (saddr->sa.sa_family) { 3825 case AF_INET: { 3826 saddr->sin.sin_port = port; 3827 break; 3828 } 3829 #ifdef INET6 3830 case AF_INET6: { 3831 saddr->sin6.sin6_port = port; 3832 break; 3833 } 3834 #endif 3835 default: 3836 printf("%s: unexpected address family %d\n", __func__, 3837 saddr->sa.sa_family); 3838 break; 3839 } 3840 3841 return; 3842 } 3843 3844 /* 3845 * Safety check sa_len 3846 */ 3847 static int 3848 key_checksalen(const union sockaddr_union *saddr) 3849 { 3850 switch (saddr->sa.sa_family) { 3851 case AF_INET: 3852 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3853 return -1; 3854 break; 3855 #ifdef INET6 3856 case AF_INET6: 3857 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3858 return -1; 3859 break; 3860 #endif 3861 default: 3862 printf("%s: unexpected sa_family %d\n", __func__, 3863 saddr->sa.sa_family); 3864 return -1; 3865 break; 3866 } 3867 return 0; 3868 } 3869 3870 3871 /* 3872 * set data into sadb_msg. 3873 */ 3874 static struct mbuf * 3875 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3876 u_int32_t seq, pid_t pid, u_int16_t reserved) 3877 { 3878 struct mbuf *m; 3879 struct sadb_msg *p; 3880 int len; 3881 3882 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3883 if (len > MCLBYTES) 3884 return NULL; 3885 MGETHDR(m, M_DONTWAIT, MT_DATA); 3886 if (m && len > MHLEN) { 3887 MCLGET(m, M_DONTWAIT); 3888 if ((m->m_flags & M_EXT) == 0) { 3889 m_freem(m); 3890 m = NULL; 3891 } 3892 } 3893 if (!m) 3894 return NULL; 3895 m->m_pkthdr.len = m->m_len = len; 3896 m->m_next = NULL; 3897 3898 p = mtod(m, struct sadb_msg *); 3899 3900 memset(p, 0, len); 3901 p->sadb_msg_version = PF_KEY_V2; 3902 p->sadb_msg_type = type; 3903 p->sadb_msg_errno = 0; 3904 p->sadb_msg_satype = satype; 3905 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3906 p->sadb_msg_reserved = reserved; 3907 p->sadb_msg_seq = seq; 3908 p->sadb_msg_pid = (u_int32_t)pid; 3909 3910 return m; 3911 } 3912 3913 /* 3914 * copy secasvar data into sadb_address. 3915 */ 3916 static struct mbuf * 3917 key_setsadbsa(struct secasvar *sav) 3918 { 3919 struct mbuf *m; 3920 struct sadb_sa *p; 3921 int len; 3922 3923 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3924 m = key_alloc_mbuf(len); 3925 if (!m || m->m_next) { /*XXX*/ 3926 if (m) 3927 m_freem(m); 3928 return NULL; 3929 } 3930 3931 p = mtod(m, struct sadb_sa *); 3932 3933 memset(p, 0, len); 3934 p->sadb_sa_len = PFKEY_UNIT64(len); 3935 p->sadb_sa_exttype = SADB_EXT_SA; 3936 p->sadb_sa_spi = sav->spi; 3937 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3938 p->sadb_sa_state = sav->state; 3939 p->sadb_sa_auth = sav->alg_auth; 3940 p->sadb_sa_encrypt = sav->alg_enc; 3941 p->sadb_sa_flags = sav->flags; 3942 3943 return m; 3944 } 3945 3946 /* 3947 * set data into sadb_address. 3948 */ 3949 static struct mbuf * 3950 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3951 u_int8_t prefixlen, u_int16_t ul_proto) 3952 { 3953 struct mbuf *m; 3954 struct sadb_address *p; 3955 size_t len; 3956 3957 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3958 PFKEY_ALIGN8(saddr->sa_len); 3959 m = key_alloc_mbuf(len); 3960 if (!m || m->m_next) { /*XXX*/ 3961 if (m) 3962 m_freem(m); 3963 return NULL; 3964 } 3965 3966 p = mtod(m, struct sadb_address *); 3967 3968 memset(p, 0, len); 3969 p->sadb_address_len = PFKEY_UNIT64(len); 3970 p->sadb_address_exttype = exttype; 3971 p->sadb_address_proto = ul_proto; 3972 if (prefixlen == FULLMASK) { 3973 switch (saddr->sa_family) { 3974 case AF_INET: 3975 prefixlen = sizeof(struct in_addr) << 3; 3976 break; 3977 case AF_INET6: 3978 prefixlen = sizeof(struct in6_addr) << 3; 3979 break; 3980 default: 3981 ; /*XXX*/ 3982 } 3983 } 3984 p->sadb_address_prefixlen = prefixlen; 3985 p->sadb_address_reserved = 0; 3986 3987 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3988 saddr, saddr->sa_len); 3989 3990 return m; 3991 } 3992 3993 #if 0 3994 /* 3995 * set data into sadb_ident. 3996 */ 3997 static struct mbuf * 3998 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3999 void *string, int stringlen, u_int64_t id) 4000 { 4001 struct mbuf *m; 4002 struct sadb_ident *p; 4003 size_t len; 4004 4005 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 4006 m = key_alloc_mbuf(len); 4007 if (!m || m->m_next) { /*XXX*/ 4008 if (m) 4009 m_freem(m); 4010 return NULL; 4011 } 4012 4013 p = mtod(m, struct sadb_ident *); 4014 4015 memset(p, 0, len); 4016 p->sadb_ident_len = PFKEY_UNIT64(len); 4017 p->sadb_ident_exttype = exttype; 4018 p->sadb_ident_type = idtype; 4019 p->sadb_ident_reserved = 0; 4020 p->sadb_ident_id = id; 4021 4022 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 4023 string, stringlen); 4024 4025 return m; 4026 } 4027 #endif 4028 4029 /* 4030 * set data into sadb_x_sa2. 4031 */ 4032 static struct mbuf * 4033 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 4034 { 4035 struct mbuf *m; 4036 struct sadb_x_sa2 *p; 4037 size_t len; 4038 4039 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4040 m = key_alloc_mbuf(len); 4041 if (!m || m->m_next) { /*XXX*/ 4042 if (m) 4043 m_freem(m); 4044 return NULL; 4045 } 4046 4047 p = mtod(m, struct sadb_x_sa2 *); 4048 4049 memset(p, 0, len); 4050 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4051 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4052 p->sadb_x_sa2_mode = mode; 4053 p->sadb_x_sa2_reserved1 = 0; 4054 p->sadb_x_sa2_reserved2 = 0; 4055 p->sadb_x_sa2_sequence = seq; 4056 p->sadb_x_sa2_reqid = reqid; 4057 4058 return m; 4059 } 4060 4061 /* 4062 * set data into sadb_x_policy 4063 */ 4064 static struct mbuf * 4065 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 4066 { 4067 struct mbuf *m; 4068 struct sadb_x_policy *p; 4069 size_t len; 4070 4071 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4072 m = key_alloc_mbuf(len); 4073 if (!m || m->m_next) { /*XXX*/ 4074 if (m) 4075 m_freem(m); 4076 return NULL; 4077 } 4078 4079 p = mtod(m, struct sadb_x_policy *); 4080 4081 memset(p, 0, len); 4082 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4083 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4084 p->sadb_x_policy_type = type; 4085 p->sadb_x_policy_dir = dir; 4086 p->sadb_x_policy_id = id; 4087 4088 return m; 4089 } 4090 4091 /* %%% utilities */ 4092 /* 4093 * copy a buffer into the new buffer allocated. 4094 */ 4095 static void * 4096 key_newbuf(const void *src, u_int len) 4097 { 4098 void *new; 4099 4100 KMALLOC(new, void *, len); 4101 if (new == NULL) { 4102 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 4103 return NULL; 4104 } 4105 memcpy(new, src, len); 4106 4107 return new; 4108 } 4109 4110 /* compare my own address 4111 * OUT: 1: true, i.e. my address. 4112 * 0: false 4113 */ 4114 int 4115 key_ismyaddr(const struct sockaddr *sa) 4116 { 4117 #ifdef INET 4118 const struct sockaddr_in *sin; 4119 const struct in_ifaddr *ia; 4120 #endif 4121 4122 /* sanity check */ 4123 if (sa == NULL) 4124 panic("key_ismyaddr: NULL pointer is passed"); 4125 4126 switch (sa->sa_family) { 4127 #ifdef INET 4128 case AF_INET: 4129 sin = (const struct sockaddr_in *)sa; 4130 for (ia = in_ifaddrhead.tqh_first; ia; 4131 ia = ia->ia_link.tqe_next) 4132 { 4133 if (sin->sin_family == ia->ia_addr.sin_family && 4134 sin->sin_len == ia->ia_addr.sin_len && 4135 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4136 { 4137 return 1; 4138 } 4139 } 4140 break; 4141 #endif 4142 #ifdef INET6 4143 case AF_INET6: 4144 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4145 #endif 4146 } 4147 4148 return 0; 4149 } 4150 4151 #ifdef INET6 4152 /* 4153 * compare my own address for IPv6. 4154 * 1: ours 4155 * 0: other 4156 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4157 */ 4158 #include <netinet6/in6_var.h> 4159 4160 static int 4161 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4162 { 4163 const struct in6_ifaddr *ia; 4164 const struct in6_multi *in6m; 4165 4166 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 4167 if (key_sockaddrcmp((const struct sockaddr *)&sin6, 4168 (const struct sockaddr *)&ia->ia_addr, 0) == 0) 4169 return 1; 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 in6m = NULL; 4178 #ifdef __FreeBSD__ 4179 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 4180 #else 4181 for ((in6m) = ia->ia6_multiaddrs.lh_first; 4182 (in6m) != NULL && 4183 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); 4184 (in6m) = in6m->in6m_entry.le_next) 4185 continue; 4186 #endif 4187 if (in6m) 4188 return 1; 4189 } 4190 4191 /* loopback, just for safety */ 4192 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4193 return 1; 4194 4195 return 0; 4196 } 4197 #endif /*INET6*/ 4198 4199 /* 4200 * compare two secasindex structure. 4201 * flag can specify to compare 2 saidxes. 4202 * compare two secasindex structure without both mode and reqid. 4203 * don't compare port. 4204 * IN: 4205 * saidx0: source, it can be in SAD. 4206 * saidx1: object. 4207 * OUT: 4208 * 1 : equal 4209 * 0 : not equal 4210 */ 4211 static int 4212 key_cmpsaidx( 4213 const struct secasindex *saidx0, 4214 const struct secasindex *saidx1, 4215 int flag) 4216 { 4217 int chkport; 4218 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4219 4220 /* sanity */ 4221 if (saidx0 == NULL && saidx1 == NULL) 4222 return 1; 4223 4224 if (saidx0 == NULL || saidx1 == NULL) 4225 return 0; 4226 4227 if (saidx0->proto != saidx1->proto) 4228 return 0; 4229 4230 if (flag == CMP_EXACTLY) { 4231 if (saidx0->mode != saidx1->mode) 4232 return 0; 4233 if (saidx0->reqid != saidx1->reqid) 4234 return 0; 4235 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4236 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4237 return 0; 4238 } else { 4239 4240 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4241 if (flag == CMP_MODE_REQID 4242 ||flag == CMP_REQID) { 4243 /* 4244 * If reqid of SPD is non-zero, unique SA is required. 4245 * The result must be of same reqid in this case. 4246 */ 4247 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4248 return 0; 4249 } 4250 4251 if (flag == CMP_MODE_REQID) { 4252 if (saidx0->mode != IPSEC_MODE_ANY 4253 && saidx0->mode != saidx1->mode) 4254 return 0; 4255 } 4256 4257 4258 sa0src = &saidx0->src.sa; 4259 sa0dst = &saidx0->dst.sa; 4260 sa1src = &saidx1->src.sa; 4261 sa1dst = &saidx1->dst.sa; 4262 /* 4263 * If NAT-T is enabled, check ports for tunnel mode. 4264 * Don't do it for transport mode, as there is no 4265 * port information available in the SP. 4266 * Also don't check ports if they are set to zero 4267 * in the SPD: This means we have a non-generated 4268 * SPD which can't know UDP ports. 4269 */ 4270 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4271 chkport = PORT_LOOSE; 4272 else 4273 chkport = PORT_NONE; 4274 4275 if (key_sockaddrcmp(sa0src, sa1src, chkport) != 0) { 4276 return 0; 4277 } 4278 if (key_sockaddrcmp(sa0dst, sa1dst, chkport) != 0) { 4279 return 0; 4280 } 4281 } 4282 4283 return 1; 4284 } 4285 4286 /* 4287 * compare two secindex structure exactly. 4288 * IN: 4289 * spidx0: source, it is often in SPD. 4290 * spidx1: object, it is often from PFKEY message. 4291 * OUT: 4292 * 1 : equal 4293 * 0 : not equal 4294 */ 4295 int 4296 key_cmpspidx_exactly( 4297 const struct secpolicyindex *spidx0, 4298 const struct secpolicyindex *spidx1) 4299 { 4300 /* sanity */ 4301 if (spidx0 == NULL && spidx1 == NULL) 4302 return 1; 4303 4304 if (spidx0 == NULL || spidx1 == NULL) 4305 return 0; 4306 4307 if (spidx0->prefs != spidx1->prefs 4308 || spidx0->prefd != spidx1->prefd 4309 || spidx0->ul_proto != spidx1->ul_proto) 4310 return 0; 4311 4312 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) == 0 && 4313 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT) == 0; 4314 } 4315 4316 /* 4317 * compare two secindex structure with mask. 4318 * IN: 4319 * spidx0: source, it is often in SPD. 4320 * spidx1: object, it is often from IP header. 4321 * OUT: 4322 * 1 : equal 4323 * 0 : not equal 4324 */ 4325 int 4326 key_cmpspidx_withmask( 4327 const struct secpolicyindex *spidx0, 4328 const struct secpolicyindex *spidx1) 4329 { 4330 /* sanity */ 4331 if (spidx0 == NULL && spidx1 == NULL) 4332 return 1; 4333 4334 if (spidx0 == NULL || spidx1 == NULL) 4335 return 0; 4336 4337 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4338 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4339 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4340 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4341 return 0; 4342 4343 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4344 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4345 && spidx0->ul_proto != spidx1->ul_proto) 4346 return 0; 4347 4348 switch (spidx0->src.sa.sa_family) { 4349 case AF_INET: 4350 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4351 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4352 return 0; 4353 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4354 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4355 return 0; 4356 break; 4357 case AF_INET6: 4358 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4359 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4360 return 0; 4361 /* 4362 * scope_id check. if sin6_scope_id is 0, we regard it 4363 * as a wildcard scope, which matches any scope zone ID. 4364 */ 4365 if (spidx0->src.sin6.sin6_scope_id && 4366 spidx1->src.sin6.sin6_scope_id && 4367 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4368 return 0; 4369 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4370 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4371 return 0; 4372 break; 4373 default: 4374 /* XXX */ 4375 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4376 return 0; 4377 break; 4378 } 4379 4380 switch (spidx0->dst.sa.sa_family) { 4381 case AF_INET: 4382 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4383 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4384 return 0; 4385 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4386 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4387 return 0; 4388 break; 4389 case AF_INET6: 4390 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4391 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4392 return 0; 4393 /* 4394 * scope_id check. if sin6_scope_id is 0, we regard it 4395 * as a wildcard scope, which matches any scope zone ID. 4396 */ 4397 if (spidx0->src.sin6.sin6_scope_id && 4398 spidx1->src.sin6.sin6_scope_id && 4399 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4400 return 0; 4401 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4402 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4403 return 0; 4404 break; 4405 default: 4406 /* XXX */ 4407 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4408 return 0; 4409 break; 4410 } 4411 4412 /* XXX Do we check other field ? e.g. flowinfo */ 4413 4414 return 1; 4415 } 4416 4417 /* returns 0 on match */ 4418 static int 4419 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4420 { 4421 switch (howport) { 4422 case PORT_NONE: 4423 return 0; 4424 case PORT_LOOSE: 4425 if (port1 == 0 || port2 == 0) 4426 return 0; 4427 /*FALLTHROUGH*/ 4428 case PORT_STRICT: 4429 if (port1 != port2) { 4430 KEYDEBUG(KEYDEBUG_MATCH, 4431 printf("port fail %d != %d\n", port1, port2)); 4432 return 1; 4433 } 4434 return 0; 4435 default: 4436 KASSERT(0); 4437 return 1; 4438 } 4439 } 4440 4441 /* returns 0 on match */ 4442 static int 4443 key_sockaddrcmp( 4444 const struct sockaddr *sa1, 4445 const struct sockaddr *sa2, 4446 int howport) 4447 { 4448 const struct sockaddr_in *sin1, *sin2; 4449 const struct sockaddr_in6 *sin61, *sin62; 4450 4451 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4452 KEYDEBUG(KEYDEBUG_MATCH, 4453 printf("fam/len fail %d != %d || %d != %d\n", 4454 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4455 sa2->sa_len)); 4456 return 1; 4457 } 4458 4459 switch (sa1->sa_family) { 4460 case AF_INET: 4461 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4462 KEYDEBUG(KEYDEBUG_MATCH, 4463 printf("len fail %d != %zu\n", 4464 sa1->sa_len, sizeof(struct sockaddr_in))); 4465 return 1; 4466 } 4467 sin1 = (const struct sockaddr_in *)sa1; 4468 sin2 = (const struct sockaddr_in *)sa2; 4469 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4470 KEYDEBUG(KEYDEBUG_MATCH, 4471 printf("addr fail %#x != %#x\n", 4472 sin1->sin_addr.s_addr, 4473 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(KEYDEBUG_MATCH, 4480 printf("addr success %#x[%d] == %#x[%d]\n", 4481 sin1->sin_addr.s_addr, 4482 sin1->sin_port, 4483 sin2->sin_addr.s_addr, 4484 sin2->sin_port)); 4485 break; 4486 case AF_INET6: 4487 sin61 = (const struct sockaddr_in6 *)sa1; 4488 sin62 = (const struct sockaddr_in6 *)sa2; 4489 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4490 return 1; /*EINVAL*/ 4491 4492 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4493 return 1; 4494 } 4495 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4496 return 1; 4497 } 4498 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4499 return 1; 4500 } 4501 break; 4502 default: 4503 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4504 return 1; 4505 break; 4506 } 4507 4508 return 0; 4509 } 4510 4511 /* 4512 * compare two buffers with mask. 4513 * IN: 4514 * addr1: source 4515 * addr2: object 4516 * bits: Number of bits to compare 4517 * OUT: 4518 * 1 : equal 4519 * 0 : not equal 4520 */ 4521 static int 4522 key_bbcmp(const void *a1, const void *a2, u_int bits) 4523 { 4524 const unsigned char *p1 = a1; 4525 const unsigned char *p2 = a2; 4526 4527 /* XXX: This could be considerably faster if we compare a word 4528 * at a time, but it is complicated on LSB Endian machines */ 4529 4530 /* Handle null pointers */ 4531 if (p1 == NULL || p2 == NULL) 4532 return (p1 == p2); 4533 4534 while (bits >= 8) { 4535 if (*p1++ != *p2++) 4536 return 0; 4537 bits -= 8; 4538 } 4539 4540 if (bits > 0) { 4541 u_int8_t mask = ~((1<<(8-bits))-1); 4542 if ((*p1 & mask) != (*p2 & mask)) 4543 return 0; 4544 } 4545 return 1; /* Match! */ 4546 } 4547 4548 /* 4549 * time handler. 4550 * scanning SPD and SAD to check status for each entries, 4551 * and do to remove or to expire. 4552 */ 4553 void 4554 key_timehandler(void* arg) 4555 { 4556 u_int dir; 4557 int s; 4558 time_t now = time_uptime; 4559 4560 s = splsoftnet(); /*called from softclock()*/ 4561 mutex_enter(softnet_lock); 4562 4563 /* SPD */ 4564 { 4565 struct secpolicy *sp, *nextsp; 4566 4567 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4568 for (sp = LIST_FIRST(&sptree[dir]); 4569 sp != NULL; 4570 sp = nextsp) { 4571 4572 nextsp = LIST_NEXT(sp, chain); 4573 4574 if (sp->state == IPSEC_SPSTATE_DEAD) { 4575 key_sp_unlink(sp); /*XXX*/ 4576 4577 /* 'sp' dead; continue transfers to 4578 * 'sp = nextsp' 4579 */ 4580 continue; 4581 } 4582 4583 if (sp->lifetime == 0 && sp->validtime == 0) 4584 continue; 4585 4586 /* the deletion will occur next time */ 4587 if ((sp->lifetime && now - sp->created > sp->lifetime) 4588 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4589 key_sp_dead(sp); 4590 key_spdexpire(sp); 4591 continue; 4592 } 4593 } 4594 } 4595 } 4596 4597 /* SAD */ 4598 { 4599 struct secashead *sah, *nextsah; 4600 struct secasvar *sav, *nextsav; 4601 4602 for (sah = LIST_FIRST(&sahtree); 4603 sah != NULL; 4604 sah = nextsah) { 4605 4606 nextsah = LIST_NEXT(sah, chain); 4607 4608 /* if sah has been dead, then delete it and process next sah. */ 4609 if (sah->state == SADB_SASTATE_DEAD) { 4610 key_delsah(sah); 4611 continue; 4612 } 4613 4614 /* if LARVAL entry doesn't become MATURE, delete it. */ 4615 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4616 sav != NULL; 4617 sav = nextsav) { 4618 4619 nextsav = LIST_NEXT(sav, chain); 4620 4621 if (now - sav->created > key_larval_lifetime) { 4622 KEY_FREESAV(&sav); 4623 } 4624 } 4625 4626 /* 4627 * check MATURE entry to start to send expire message 4628 * whether or not. 4629 */ 4630 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4631 sav != NULL; 4632 sav = nextsav) { 4633 4634 nextsav = LIST_NEXT(sav, chain); 4635 4636 /* we don't need to check. */ 4637 if (sav->lft_s == NULL) 4638 continue; 4639 4640 /* sanity check */ 4641 if (sav->lft_c == NULL) { 4642 ipseclog((LOG_DEBUG,"key_timehandler: " 4643 "There is no CURRENT time, why?\n")); 4644 continue; 4645 } 4646 4647 /* check SOFT lifetime */ 4648 if (sav->lft_s->sadb_lifetime_addtime != 0 4649 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4650 /* 4651 * check SA to be used whether or not. 4652 * when SA hasn't been used, delete it. 4653 */ 4654 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4655 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4656 KEY_FREESAV(&sav); 4657 } else { 4658 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4659 /* 4660 * XXX If we keep to send expire 4661 * message in the status of 4662 * DYING. Do remove below code. 4663 */ 4664 key_expire(sav); 4665 } 4666 } 4667 /* check SOFT lifetime by bytes */ 4668 /* 4669 * XXX I don't know the way to delete this SA 4670 * when new SA is installed. Caution when it's 4671 * installed too big lifetime by time. 4672 */ 4673 else if (sav->lft_s->sadb_lifetime_bytes != 0 4674 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4675 4676 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4677 /* 4678 * XXX If we keep to send expire 4679 * message in the status of 4680 * DYING. Do remove below code. 4681 */ 4682 key_expire(sav); 4683 } 4684 } 4685 4686 /* check DYING entry to change status to DEAD. */ 4687 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4688 sav != NULL; 4689 sav = nextsav) { 4690 4691 nextsav = LIST_NEXT(sav, chain); 4692 4693 /* we don't need to check. */ 4694 if (sav->lft_h == NULL) 4695 continue; 4696 4697 /* sanity check */ 4698 if (sav->lft_c == NULL) { 4699 ipseclog((LOG_DEBUG, "key_timehandler: " 4700 "There is no CURRENT time, why?\n")); 4701 continue; 4702 } 4703 4704 if (sav->lft_h->sadb_lifetime_addtime != 0 4705 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4706 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4707 KEY_FREESAV(&sav); 4708 } 4709 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4710 else if (sav->lft_s != NULL 4711 && sav->lft_s->sadb_lifetime_addtime != 0 4712 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4713 /* 4714 * XXX: should be checked to be 4715 * installed the valid SA. 4716 */ 4717 4718 /* 4719 * If there is no SA then sending 4720 * expire message. 4721 */ 4722 key_expire(sav); 4723 } 4724 #endif 4725 /* check HARD lifetime by bytes */ 4726 else if (sav->lft_h->sadb_lifetime_bytes != 0 4727 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4728 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4729 KEY_FREESAV(&sav); 4730 } 4731 } 4732 4733 /* delete entry in DEAD */ 4734 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4735 sav != NULL; 4736 sav = nextsav) { 4737 4738 nextsav = LIST_NEXT(sav, chain); 4739 4740 /* sanity check */ 4741 if (sav->state != SADB_SASTATE_DEAD) { 4742 ipseclog((LOG_DEBUG, "key_timehandler: " 4743 "invalid sav->state " 4744 "(queue: %d SA: %d): " 4745 "kill it anyway\n", 4746 SADB_SASTATE_DEAD, sav->state)); 4747 } 4748 4749 /* 4750 * do not call key_freesav() here. 4751 * sav should already be freed, and sav->refcnt 4752 * shows other references to sav 4753 * (such as from SPD). 4754 */ 4755 } 4756 } 4757 } 4758 4759 #ifndef IPSEC_NONBLOCK_ACQUIRE 4760 /* ACQ tree */ 4761 { 4762 struct secacq *acq, *nextacq; 4763 4764 for (acq = LIST_FIRST(&acqtree); 4765 acq != NULL; 4766 acq = nextacq) { 4767 4768 nextacq = LIST_NEXT(acq, chain); 4769 4770 if (now - acq->created > key_blockacq_lifetime 4771 && __LIST_CHAINED(acq)) { 4772 LIST_REMOVE(acq, chain); 4773 KFREE(acq); 4774 } 4775 } 4776 } 4777 #endif 4778 4779 /* SP ACQ tree */ 4780 { 4781 struct secspacq *acq, *nextacq; 4782 4783 for (acq = LIST_FIRST(&spacqtree); 4784 acq != NULL; 4785 acq = nextacq) { 4786 4787 nextacq = LIST_NEXT(acq, chain); 4788 4789 if (now - acq->created > key_blockacq_lifetime 4790 && __LIST_CHAINED(acq)) { 4791 LIST_REMOVE(acq, chain); 4792 KFREE(acq); 4793 } 4794 } 4795 } 4796 4797 #ifndef IPSEC_DEBUG2 4798 /* do exchange to tick time !! */ 4799 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4800 #endif /* IPSEC_DEBUG2 */ 4801 4802 mutex_exit(softnet_lock); 4803 splx(s); 4804 return; 4805 } 4806 4807 u_long 4808 key_random(void) 4809 { 4810 u_long value; 4811 4812 key_randomfill(&value, sizeof(value)); 4813 return value; 4814 } 4815 4816 void 4817 key_randomfill(void *p, size_t l) 4818 { 4819 4820 cprng_fast(p, l); 4821 } 4822 4823 /* 4824 * map SADB_SATYPE_* to IPPROTO_*. 4825 * if satype == SADB_SATYPE then satype is mapped to ~0. 4826 * OUT: 4827 * 0: invalid satype. 4828 */ 4829 static u_int16_t 4830 key_satype2proto(u_int8_t satype) 4831 { 4832 switch (satype) { 4833 case SADB_SATYPE_UNSPEC: 4834 return IPSEC_PROTO_ANY; 4835 case SADB_SATYPE_AH: 4836 return IPPROTO_AH; 4837 case SADB_SATYPE_ESP: 4838 return IPPROTO_ESP; 4839 case SADB_X_SATYPE_IPCOMP: 4840 return IPPROTO_IPCOMP; 4841 case SADB_X_SATYPE_TCPSIGNATURE: 4842 return IPPROTO_TCP; 4843 default: 4844 return 0; 4845 } 4846 /* NOTREACHED */ 4847 } 4848 4849 /* 4850 * map IPPROTO_* to SADB_SATYPE_* 4851 * OUT: 4852 * 0: invalid protocol type. 4853 */ 4854 static u_int8_t 4855 key_proto2satype(u_int16_t proto) 4856 { 4857 switch (proto) { 4858 case IPPROTO_AH: 4859 return SADB_SATYPE_AH; 4860 case IPPROTO_ESP: 4861 return SADB_SATYPE_ESP; 4862 case IPPROTO_IPCOMP: 4863 return SADB_X_SATYPE_IPCOMP; 4864 case IPPROTO_TCP: 4865 return SADB_X_SATYPE_TCPSIGNATURE; 4866 default: 4867 return 0; 4868 } 4869 /* NOTREACHED */ 4870 } 4871 4872 static int 4873 key_setsecasidx(int proto, int mode, int reqid, 4874 const struct sadb_address * src, 4875 const struct sadb_address * dst, 4876 struct secasindex * saidx) 4877 { 4878 const union sockaddr_union * src_u = 4879 (const union sockaddr_union *) src; 4880 const union sockaddr_union * dst_u = 4881 (const union sockaddr_union *) dst; 4882 4883 /* sa len safety check */ 4884 if (key_checksalen(src_u) != 0) 4885 return -1; 4886 if (key_checksalen(dst_u) != 0) 4887 return -1; 4888 4889 memset(saidx, 0, sizeof(*saidx)); 4890 saidx->proto = proto; 4891 saidx->mode = mode; 4892 saidx->reqid = reqid; 4893 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4894 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4895 4896 key_porttosaddr(&((saidx)->src),0); 4897 key_porttosaddr(&((saidx)->dst),0); 4898 return 0; 4899 } 4900 4901 /* %%% PF_KEY */ 4902 /* 4903 * SADB_GETSPI processing is to receive 4904 * <base, (SA2), src address, dst address, (SPI range)> 4905 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4906 * tree with the status of LARVAL, and send 4907 * <base, SA(*), address(SD)> 4908 * to the IKMPd. 4909 * 4910 * IN: mhp: pointer to the pointer to each header. 4911 * OUT: NULL if fail. 4912 * other if success, return pointer to the message to send. 4913 */ 4914 static int 4915 key_getspi(struct socket *so, struct mbuf *m, 4916 const struct sadb_msghdr *mhp) 4917 { 4918 struct sadb_address *src0, *dst0; 4919 struct secasindex saidx; 4920 struct secashead *newsah; 4921 struct secasvar *newsav; 4922 u_int8_t proto; 4923 u_int32_t spi; 4924 u_int8_t mode; 4925 u_int16_t reqid; 4926 int error; 4927 4928 /* sanity check */ 4929 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4930 panic("key_getspi: NULL pointer is passed"); 4931 4932 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4933 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4934 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4935 return key_senderror(so, m, EINVAL); 4936 } 4937 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4938 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4939 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4940 return key_senderror(so, m, EINVAL); 4941 } 4942 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4943 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4944 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4945 } else { 4946 mode = IPSEC_MODE_ANY; 4947 reqid = 0; 4948 } 4949 4950 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4951 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4952 4953 /* map satype to proto */ 4954 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4955 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4956 return key_senderror(so, m, EINVAL); 4957 } 4958 4959 4960 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 4961 dst0 + 1, &saidx)) != 0) 4962 return key_senderror(so, m, EINVAL); 4963 4964 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 4965 return key_senderror(so, m, EINVAL); 4966 4967 /* SPI allocation */ 4968 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4969 &saidx); 4970 if (spi == 0) 4971 return key_senderror(so, m, EINVAL); 4972 4973 /* get a SA index */ 4974 if ((newsah = key_getsah(&saidx)) == NULL) { 4975 /* create a new SA index */ 4976 if ((newsah = key_newsah(&saidx)) == NULL) { 4977 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4978 return key_senderror(so, m, ENOBUFS); 4979 } 4980 } 4981 4982 /* get a new SA */ 4983 /* XXX rewrite */ 4984 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4985 if (newsav == NULL) { 4986 /* XXX don't free new SA index allocated in above. */ 4987 return key_senderror(so, m, error); 4988 } 4989 4990 /* set spi */ 4991 newsav->spi = htonl(spi); 4992 4993 #ifndef IPSEC_NONBLOCK_ACQUIRE 4994 /* delete the entry in acqtree */ 4995 if (mhp->msg->sadb_msg_seq != 0) { 4996 struct secacq *acq; 4997 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4998 /* reset counter in order to deletion by timehandler. */ 4999 acq->created = time_uptime; 5000 acq->count = 0; 5001 } 5002 } 5003 #endif 5004 5005 { 5006 struct mbuf *n, *nn; 5007 struct sadb_sa *m_sa; 5008 struct sadb_msg *newmsg; 5009 int off, len; 5010 5011 /* create new sadb_msg to reply. */ 5012 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 5013 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5014 if (len > MCLBYTES) 5015 return key_senderror(so, m, ENOBUFS); 5016 5017 MGETHDR(n, M_DONTWAIT, MT_DATA); 5018 if (len > MHLEN) { 5019 MCLGET(n, M_DONTWAIT); 5020 if ((n->m_flags & M_EXT) == 0) { 5021 m_freem(n); 5022 n = NULL; 5023 } 5024 } 5025 if (!n) 5026 return key_senderror(so, m, ENOBUFS); 5027 5028 n->m_len = len; 5029 n->m_next = NULL; 5030 off = 0; 5031 5032 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 5033 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 5034 5035 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 5036 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 5037 m_sa->sadb_sa_exttype = SADB_EXT_SA; 5038 m_sa->sadb_sa_spi = htonl(spi); 5039 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5040 5041 #ifdef DIAGNOSTIC 5042 if (off != len) 5043 panic("length inconsistency in key_getspi"); 5044 #endif 5045 5046 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 5047 SADB_EXT_ADDRESS_DST); 5048 if (!n->m_next) { 5049 m_freem(n); 5050 return key_senderror(so, m, ENOBUFS); 5051 } 5052 5053 if (n->m_len < sizeof(struct sadb_msg)) { 5054 n = m_pullup(n, sizeof(struct sadb_msg)); 5055 if (n == NULL) 5056 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 5057 } 5058 5059 n->m_pkthdr.len = 0; 5060 for (nn = n; nn; nn = nn->m_next) 5061 n->m_pkthdr.len += nn->m_len; 5062 5063 newmsg = mtod(n, struct sadb_msg *); 5064 newmsg->sadb_msg_seq = newsav->seq; 5065 newmsg->sadb_msg_errno = 0; 5066 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5067 5068 m_freem(m); 5069 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5070 } 5071 } 5072 5073 /* 5074 * allocating new SPI 5075 * called by key_getspi(). 5076 * OUT: 5077 * 0: failure. 5078 * others: success. 5079 */ 5080 static u_int32_t 5081 key_do_getnewspi(const struct sadb_spirange *spirange, 5082 const struct secasindex *saidx) 5083 { 5084 u_int32_t newspi; 5085 u_int32_t spmin, spmax; 5086 int count = key_spi_trycnt; 5087 5088 /* set spi range to allocate */ 5089 if (spirange != NULL) { 5090 spmin = spirange->sadb_spirange_min; 5091 spmax = spirange->sadb_spirange_max; 5092 } else { 5093 spmin = key_spi_minval; 5094 spmax = key_spi_maxval; 5095 } 5096 /* IPCOMP needs 2-byte SPI */ 5097 if (saidx->proto == IPPROTO_IPCOMP) { 5098 u_int32_t t; 5099 if (spmin >= 0x10000) 5100 spmin = 0xffff; 5101 if (spmax >= 0x10000) 5102 spmax = 0xffff; 5103 if (spmin > spmax) { 5104 t = spmin; spmin = spmax; spmax = t; 5105 } 5106 } 5107 5108 if (spmin == spmax) { 5109 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5110 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 5111 return 0; 5112 } 5113 5114 count--; /* taking one cost. */ 5115 newspi = spmin; 5116 5117 } else { 5118 5119 /* init SPI */ 5120 newspi = 0; 5121 5122 /* when requesting to allocate spi ranged */ 5123 while (count--) { 5124 /* generate pseudo-random SPI value ranged. */ 5125 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5126 5127 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5128 break; 5129 } 5130 5131 if (count == 0 || newspi == 0) { 5132 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 5133 return 0; 5134 } 5135 } 5136 5137 /* statistics */ 5138 keystat.getspi_count = 5139 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5140 5141 return newspi; 5142 } 5143 5144 static int 5145 key_handle_natt_info(struct secasvar *sav, 5146 const struct sadb_msghdr *mhp) 5147 { 5148 const char *msg = "?" ; 5149 struct sadb_x_nat_t_type *type; 5150 struct sadb_x_nat_t_port *sport, *dport; 5151 struct sadb_address *iaddr, *raddr; 5152 struct sadb_x_nat_t_frag *frag; 5153 5154 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5155 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5156 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5157 return 0; 5158 5159 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5160 msg = "TYPE"; 5161 goto bad; 5162 } 5163 5164 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5165 msg = "SPORT"; 5166 goto bad; 5167 } 5168 5169 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5170 msg = "DPORT"; 5171 goto bad; 5172 } 5173 5174 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5175 ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n", __func__)); 5176 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5177 msg = "OAI"; 5178 goto bad; 5179 } 5180 } 5181 5182 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5183 ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n", __func__)); 5184 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5185 msg = "OAR"; 5186 goto bad; 5187 } 5188 } 5189 5190 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5191 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5192 msg = "FRAG"; 5193 goto bad; 5194 } 5195 } 5196 5197 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5198 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5199 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5200 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5201 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5202 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5203 5204 ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n", 5205 __func__, type->sadb_x_nat_t_type_type, 5206 ntohs(sport->sadb_x_nat_t_port_port), 5207 ntohs(dport->sadb_x_nat_t_port_port))); 5208 5209 sav->natt_type = type->sadb_x_nat_t_type_type; 5210 key_porttosaddr(&sav->sah->saidx.src, 5211 sport->sadb_x_nat_t_port_port); 5212 key_porttosaddr(&sav->sah->saidx.dst, 5213 dport->sadb_x_nat_t_port_port); 5214 if (frag) 5215 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5216 else 5217 sav->esp_frag = IP_MAXPACKET; 5218 5219 return 0; 5220 bad: 5221 ipseclog((LOG_DEBUG, "%s: invalid message %s\n", __func__, msg)); 5222 __USE(msg); 5223 return -1; 5224 } 5225 5226 /* Just update the IPSEC_NAT_T ports if present */ 5227 static int 5228 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5229 const struct sadb_msghdr *mhp) 5230 { 5231 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5232 ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n", __func__)); 5233 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5234 ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n", __func__)); 5235 5236 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5237 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5238 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5239 struct sadb_x_nat_t_type *type; 5240 struct sadb_x_nat_t_port *sport; 5241 struct sadb_x_nat_t_port *dport; 5242 5243 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5244 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5245 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5246 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5247 __func__)); 5248 return -1; 5249 } 5250 5251 type = (struct sadb_x_nat_t_type *) 5252 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5253 sport = (struct sadb_x_nat_t_port *) 5254 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5255 dport = (struct sadb_x_nat_t_port *) 5256 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5257 5258 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5259 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5260 5261 ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n", 5262 __func__, type->sadb_x_nat_t_type_type, 5263 ntohs(sport->sadb_x_nat_t_port_port), 5264 ntohs(dport->sadb_x_nat_t_port_port))); 5265 } 5266 5267 return 0; 5268 } 5269 5270 5271 /* 5272 * SADB_UPDATE processing 5273 * receive 5274 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5275 * key(AE), (identity(SD),) (sensitivity)> 5276 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5277 * and send 5278 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5279 * (identity(SD),) (sensitivity)> 5280 * to the ikmpd. 5281 * 5282 * m will always be freed. 5283 */ 5284 static int 5285 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5286 { 5287 struct sadb_sa *sa0; 5288 struct sadb_address *src0, *dst0; 5289 struct secasindex saidx; 5290 struct secashead *sah; 5291 struct secasvar *sav; 5292 u_int16_t proto; 5293 u_int8_t mode; 5294 u_int16_t reqid; 5295 int error; 5296 5297 /* sanity check */ 5298 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5299 panic("key_update: NULL pointer is passed"); 5300 5301 /* map satype to proto */ 5302 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5303 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 5304 return key_senderror(so, m, EINVAL); 5305 } 5306 5307 if (mhp->ext[SADB_EXT_SA] == NULL || 5308 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5309 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5310 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5311 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5312 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5313 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5314 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5315 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5316 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5317 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5318 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5319 return key_senderror(so, m, EINVAL); 5320 } 5321 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5322 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5323 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5324 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5325 return key_senderror(so, m, EINVAL); 5326 } 5327 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5328 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5329 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5330 } else { 5331 mode = IPSEC_MODE_ANY; 5332 reqid = 0; 5333 } 5334 /* XXX boundary checking for other extensions */ 5335 5336 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5337 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5338 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5339 5340 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5341 dst0 + 1, &saidx)) != 0) 5342 return key_senderror(so, m, EINVAL); 5343 5344 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5345 return key_senderror(so, m, EINVAL); 5346 5347 /* get a SA header */ 5348 if ((sah = key_getsah(&saidx)) == NULL) { 5349 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 5350 return key_senderror(so, m, ENOENT); 5351 } 5352 5353 /* set spidx if there */ 5354 /* XXX rewrite */ 5355 error = key_setident(sah, m, mhp); 5356 if (error) 5357 return key_senderror(so, m, error); 5358 5359 /* find a SA with sequence number. */ 5360 #ifdef IPSEC_DOSEQCHECK 5361 if (mhp->msg->sadb_msg_seq != 0 5362 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5363 ipseclog((LOG_DEBUG, 5364 "key_update: no larval SA with sequence %u exists.\n", 5365 mhp->msg->sadb_msg_seq)); 5366 return key_senderror(so, m, ENOENT); 5367 } 5368 #else 5369 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 5370 ipseclog((LOG_DEBUG, 5371 "key_update: no such a SA found (spi:%u)\n", 5372 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5373 return key_senderror(so, m, EINVAL); 5374 } 5375 #endif 5376 5377 /* validity check */ 5378 if (sav->sah->saidx.proto != proto) { 5379 ipseclog((LOG_DEBUG, 5380 "key_update: protocol mismatched (DB=%u param=%u)\n", 5381 sav->sah->saidx.proto, proto)); 5382 return key_senderror(so, m, EINVAL); 5383 } 5384 #ifdef IPSEC_DOSEQCHECK 5385 if (sav->spi != sa0->sadb_sa_spi) { 5386 ipseclog((LOG_DEBUG, 5387 "key_update: SPI mismatched (DB:%u param:%u)\n", 5388 (u_int32_t)ntohl(sav->spi), 5389 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5390 return key_senderror(so, m, EINVAL); 5391 } 5392 #endif 5393 if (sav->pid != mhp->msg->sadb_msg_pid) { 5394 ipseclog((LOG_DEBUG, 5395 "key_update: pid mismatched (DB:%u param:%u)\n", 5396 sav->pid, mhp->msg->sadb_msg_pid)); 5397 return key_senderror(so, m, EINVAL); 5398 } 5399 5400 /* copy sav values */ 5401 error = key_setsaval(sav, m, mhp); 5402 if (error) { 5403 KEY_FREESAV(&sav); 5404 return key_senderror(so, m, error); 5405 } 5406 5407 if ((error = key_handle_natt_info(sav,mhp)) != 0) 5408 return key_senderror(so, m, EINVAL); 5409 5410 /* check SA values to be mature. */ 5411 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5412 KEY_FREESAV(&sav); 5413 return key_senderror(so, m, 0); 5414 } 5415 5416 { 5417 struct mbuf *n; 5418 5419 /* set msg buf from mhp */ 5420 n = key_getmsgbuf_x1(m, mhp); 5421 if (n == NULL) { 5422 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5423 return key_senderror(so, m, ENOBUFS); 5424 } 5425 5426 m_freem(m); 5427 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5428 } 5429 } 5430 5431 /* 5432 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5433 * only called by key_update(). 5434 * OUT: 5435 * NULL : not found 5436 * others : found, pointer to a SA. 5437 */ 5438 #ifdef IPSEC_DOSEQCHECK 5439 static struct secasvar * 5440 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5441 { 5442 struct secasvar *sav; 5443 u_int state; 5444 5445 state = SADB_SASTATE_LARVAL; 5446 5447 /* search SAD with sequence number ? */ 5448 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5449 5450 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5451 5452 if (sav->seq == seq) { 5453 SA_ADDREF(sav); 5454 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5455 printf("DP %s cause refcnt++:%d SA:%p\n", 5456 __func__, sav->refcnt, sav)); 5457 return sav; 5458 } 5459 } 5460 5461 return NULL; 5462 } 5463 #endif 5464 5465 /* 5466 * SADB_ADD processing 5467 * add an entry to SA database, when received 5468 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5469 * key(AE), (identity(SD),) (sensitivity)> 5470 * from the ikmpd, 5471 * and send 5472 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5473 * (identity(SD),) (sensitivity)> 5474 * to the ikmpd. 5475 * 5476 * IGNORE identity and sensitivity messages. 5477 * 5478 * m will always be freed. 5479 */ 5480 static int 5481 key_add(struct socket *so, struct mbuf *m, 5482 const struct sadb_msghdr *mhp) 5483 { 5484 struct sadb_sa *sa0; 5485 struct sadb_address *src0, *dst0; 5486 struct secasindex saidx; 5487 struct secashead *newsah; 5488 struct secasvar *newsav; 5489 u_int16_t proto; 5490 u_int8_t mode; 5491 u_int16_t reqid; 5492 int error; 5493 5494 /* sanity check */ 5495 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5496 panic("key_add: NULL pointer is passed"); 5497 5498 /* map satype to proto */ 5499 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5500 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5501 return key_senderror(so, m, EINVAL); 5502 } 5503 5504 if (mhp->ext[SADB_EXT_SA] == NULL || 5505 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5506 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5507 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5508 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5509 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5510 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5511 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5512 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5513 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5514 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5515 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5516 return key_senderror(so, m, EINVAL); 5517 } 5518 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5519 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5520 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5521 /* XXX need more */ 5522 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5523 return key_senderror(so, m, EINVAL); 5524 } 5525 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5526 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5527 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5528 } else { 5529 mode = IPSEC_MODE_ANY; 5530 reqid = 0; 5531 } 5532 5533 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5534 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5535 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5536 5537 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5538 dst0 + 1, &saidx)) != 0) 5539 return key_senderror(so, m, EINVAL); 5540 5541 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5542 return key_senderror(so, m, EINVAL); 5543 5544 /* get a SA header */ 5545 if ((newsah = key_getsah(&saidx)) == NULL) { 5546 /* create a new SA header */ 5547 if ((newsah = key_newsah(&saidx)) == NULL) { 5548 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5549 return key_senderror(so, m, ENOBUFS); 5550 } 5551 } 5552 5553 /* set spidx if there */ 5554 /* XXX rewrite */ 5555 error = key_setident(newsah, m, mhp); 5556 if (error) { 5557 return key_senderror(so, m, error); 5558 } 5559 5560 /* create new SA entry. */ 5561 /* We can create new SA only if SPI is differenct. */ 5562 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5563 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5564 return key_senderror(so, m, EEXIST); 5565 } 5566 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5567 if (newsav == NULL) { 5568 return key_senderror(so, m, error); 5569 } 5570 5571 if ((error = key_handle_natt_info(newsav, mhp)) != 0) 5572 return key_senderror(so, m, EINVAL); 5573 5574 /* check SA values to be mature. */ 5575 if ((error = key_mature(newsav)) != 0) { 5576 KEY_FREESAV(&newsav); 5577 return key_senderror(so, m, error); 5578 } 5579 5580 /* 5581 * don't call key_freesav() here, as we would like to keep the SA 5582 * in the database on success. 5583 */ 5584 5585 { 5586 struct mbuf *n; 5587 5588 /* set msg buf from mhp */ 5589 n = key_getmsgbuf_x1(m, mhp); 5590 if (n == NULL) { 5591 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5592 return key_senderror(so, m, ENOBUFS); 5593 } 5594 5595 m_freem(m); 5596 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5597 } 5598 } 5599 5600 /* m is retained */ 5601 static int 5602 key_setident(struct secashead *sah, struct mbuf *m, 5603 const struct sadb_msghdr *mhp) 5604 { 5605 const struct sadb_ident *idsrc, *iddst; 5606 int idsrclen, iddstlen; 5607 5608 /* sanity check */ 5609 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5610 panic("key_setident: NULL pointer is passed"); 5611 5612 /* don't make buffer if not there */ 5613 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5614 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5615 sah->idents = NULL; 5616 sah->identd = NULL; 5617 return 0; 5618 } 5619 5620 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5621 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5622 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5623 return EINVAL; 5624 } 5625 5626 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5627 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5628 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5629 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5630 5631 /* validity check */ 5632 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5633 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5634 return EINVAL; 5635 } 5636 5637 switch (idsrc->sadb_ident_type) { 5638 case SADB_IDENTTYPE_PREFIX: 5639 case SADB_IDENTTYPE_FQDN: 5640 case SADB_IDENTTYPE_USERFQDN: 5641 default: 5642 /* XXX do nothing */ 5643 sah->idents = NULL; 5644 sah->identd = NULL; 5645 return 0; 5646 } 5647 5648 /* make structure */ 5649 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5650 if (sah->idents == NULL) { 5651 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5652 return ENOBUFS; 5653 } 5654 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5655 if (sah->identd == NULL) { 5656 KFREE(sah->idents); 5657 sah->idents = NULL; 5658 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5659 return ENOBUFS; 5660 } 5661 memcpy(sah->idents, idsrc, idsrclen); 5662 memcpy(sah->identd, iddst, iddstlen); 5663 5664 return 0; 5665 } 5666 5667 /* 5668 * m will not be freed on return. 5669 * it is caller's responsibility to free the result. 5670 */ 5671 static struct mbuf * 5672 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5673 { 5674 struct mbuf *n; 5675 5676 /* sanity check */ 5677 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5678 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5679 5680 /* create new sadb_msg to reply. */ 5681 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5682 SADB_EXT_SA, SADB_X_EXT_SA2, 5683 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5684 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5685 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5686 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5687 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5688 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5689 if (!n) 5690 return NULL; 5691 5692 if (n->m_len < sizeof(struct sadb_msg)) { 5693 n = m_pullup(n, sizeof(struct sadb_msg)); 5694 if (n == NULL) 5695 return NULL; 5696 } 5697 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5698 mtod(n, struct sadb_msg *)->sadb_msg_len = 5699 PFKEY_UNIT64(n->m_pkthdr.len); 5700 5701 return n; 5702 } 5703 5704 static int key_delete_all (struct socket *, struct mbuf *, 5705 const struct sadb_msghdr *, u_int16_t); 5706 5707 /* 5708 * SADB_DELETE processing 5709 * receive 5710 * <base, SA(*), address(SD)> 5711 * from the ikmpd, and set SADB_SASTATE_DEAD, 5712 * and send, 5713 * <base, SA(*), address(SD)> 5714 * to the ikmpd. 5715 * 5716 * m will always be freed. 5717 */ 5718 static int 5719 key_delete(struct socket *so, struct mbuf *m, 5720 const struct sadb_msghdr *mhp) 5721 { 5722 struct sadb_sa *sa0; 5723 struct sadb_address *src0, *dst0; 5724 struct secasindex saidx; 5725 struct secashead *sah; 5726 struct secasvar *sav = NULL; 5727 u_int16_t proto; 5728 int error; 5729 5730 /* sanity check */ 5731 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5732 panic("key_delete: NULL pointer is passed"); 5733 5734 /* map satype to proto */ 5735 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5736 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5737 return key_senderror(so, m, EINVAL); 5738 } 5739 5740 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5741 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5742 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5743 return key_senderror(so, m, EINVAL); 5744 } 5745 5746 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5747 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5748 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5749 return key_senderror(so, m, EINVAL); 5750 } 5751 5752 if (mhp->ext[SADB_EXT_SA] == NULL) { 5753 /* 5754 * Caller wants us to delete all non-LARVAL SAs 5755 * that match the src/dst. This is used during 5756 * IKE INITIAL-CONTACT. 5757 */ 5758 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5759 return key_delete_all(so, m, mhp, proto); 5760 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5761 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5762 return key_senderror(so, m, EINVAL); 5763 } 5764 5765 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5766 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5767 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5768 5769 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5770 dst0 + 1, &saidx)) != 0) 5771 return key_senderror(so, m, EINVAL); 5772 5773 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5774 return key_senderror(so, m, EINVAL); 5775 5776 /* get a SA header */ 5777 LIST_FOREACH(sah, &sahtree, chain) { 5778 if (sah->state == SADB_SASTATE_DEAD) 5779 continue; 5780 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5781 continue; 5782 5783 /* get a SA with SPI. */ 5784 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5785 if (sav) 5786 break; 5787 } 5788 if (sah == NULL) { 5789 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5790 return key_senderror(so, m, ENOENT); 5791 } 5792 5793 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5794 KEY_FREESAV(&sav); 5795 5796 { 5797 struct mbuf *n; 5798 struct sadb_msg *newmsg; 5799 5800 /* create new sadb_msg to reply. */ 5801 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5802 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5803 if (!n) 5804 return key_senderror(so, m, ENOBUFS); 5805 5806 if (n->m_len < sizeof(struct sadb_msg)) { 5807 n = m_pullup(n, sizeof(struct sadb_msg)); 5808 if (n == NULL) 5809 return key_senderror(so, m, ENOBUFS); 5810 } 5811 newmsg = mtod(n, struct sadb_msg *); 5812 newmsg->sadb_msg_errno = 0; 5813 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5814 5815 m_freem(m); 5816 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5817 } 5818 } 5819 5820 /* 5821 * delete all SAs for src/dst. Called from key_delete(). 5822 */ 5823 static int 5824 key_delete_all(struct socket *so, struct mbuf *m, 5825 const struct sadb_msghdr *mhp, u_int16_t proto) 5826 { 5827 struct sadb_address *src0, *dst0; 5828 struct secasindex saidx; 5829 struct secashead *sah; 5830 struct secasvar *sav, *nextsav; 5831 u_int stateidx, state; 5832 int error; 5833 5834 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5835 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5836 5837 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5838 dst0 + 1, &saidx)) != 0) 5839 return key_senderror(so, m, EINVAL); 5840 5841 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5842 return key_senderror(so, m, EINVAL); 5843 5844 LIST_FOREACH(sah, &sahtree, chain) { 5845 if (sah->state == SADB_SASTATE_DEAD) 5846 continue; 5847 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5848 continue; 5849 5850 /* Delete all non-LARVAL SAs. */ 5851 for (stateidx = 0; 5852 stateidx < _ARRAYLEN(saorder_state_alive); 5853 stateidx++) { 5854 state = saorder_state_alive[stateidx]; 5855 if (state == SADB_SASTATE_LARVAL) 5856 continue; 5857 for (sav = LIST_FIRST(&sah->savtree[state]); 5858 sav != NULL; sav = nextsav) { 5859 nextsav = LIST_NEXT(sav, chain); 5860 /* sanity check */ 5861 if (sav->state != state) { 5862 ipseclog((LOG_DEBUG, "key_delete_all: " 5863 "invalid sav->state " 5864 "(queue: %d SA: %d)\n", 5865 state, sav->state)); 5866 continue; 5867 } 5868 5869 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5870 KEY_FREESAV(&sav); 5871 } 5872 } 5873 } 5874 { 5875 struct mbuf *n; 5876 struct sadb_msg *newmsg; 5877 5878 /* create new sadb_msg to reply. */ 5879 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5880 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5881 if (!n) 5882 return key_senderror(so, m, ENOBUFS); 5883 5884 if (n->m_len < sizeof(struct sadb_msg)) { 5885 n = m_pullup(n, sizeof(struct sadb_msg)); 5886 if (n == NULL) 5887 return key_senderror(so, m, ENOBUFS); 5888 } 5889 newmsg = mtod(n, struct sadb_msg *); 5890 newmsg->sadb_msg_errno = 0; 5891 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5892 5893 m_freem(m); 5894 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5895 } 5896 } 5897 5898 /* 5899 * SADB_GET processing 5900 * receive 5901 * <base, SA(*), address(SD)> 5902 * from the ikmpd, and get a SP and a SA to respond, 5903 * and send, 5904 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5905 * (identity(SD),) (sensitivity)> 5906 * to the ikmpd. 5907 * 5908 * m will always be freed. 5909 */ 5910 static int 5911 key_get(struct socket *so, struct mbuf *m, 5912 const struct sadb_msghdr *mhp) 5913 { 5914 struct sadb_sa *sa0; 5915 struct sadb_address *src0, *dst0; 5916 struct secasindex saidx; 5917 struct secashead *sah; 5918 struct secasvar *sav = NULL; 5919 u_int16_t proto; 5920 int error; 5921 5922 /* sanity check */ 5923 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5924 panic("key_get: NULL pointer is passed"); 5925 5926 /* map satype to proto */ 5927 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5928 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5929 return key_senderror(so, m, EINVAL); 5930 } 5931 5932 if (mhp->ext[SADB_EXT_SA] == NULL || 5933 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5934 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5935 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5936 return key_senderror(so, m, EINVAL); 5937 } 5938 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5939 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5940 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5941 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5942 return key_senderror(so, m, EINVAL); 5943 } 5944 5945 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5946 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5947 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5948 5949 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5950 dst0 + 1, &saidx)) != 0) 5951 return key_senderror(so, m, EINVAL); 5952 5953 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5954 return key_senderror(so, m, EINVAL); 5955 5956 /* get a SA header */ 5957 LIST_FOREACH(sah, &sahtree, chain) { 5958 if (sah->state == SADB_SASTATE_DEAD) 5959 continue; 5960 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5961 continue; 5962 5963 /* get a SA with SPI. */ 5964 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5965 if (sav) 5966 break; 5967 } 5968 if (sah == NULL) { 5969 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5970 return key_senderror(so, m, ENOENT); 5971 } 5972 5973 { 5974 struct mbuf *n; 5975 u_int8_t satype; 5976 5977 /* map proto to satype */ 5978 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5979 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5980 return key_senderror(so, m, EINVAL); 5981 } 5982 5983 /* create new sadb_msg to reply. */ 5984 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5985 mhp->msg->sadb_msg_pid); 5986 if (!n) 5987 return key_senderror(so, m, ENOBUFS); 5988 5989 m_freem(m); 5990 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5991 } 5992 } 5993 5994 /* XXX make it sysctl-configurable? */ 5995 static void 5996 key_getcomb_setlifetime(struct sadb_comb *comb) 5997 { 5998 5999 comb->sadb_comb_soft_allocations = 1; 6000 comb->sadb_comb_hard_allocations = 1; 6001 comb->sadb_comb_soft_bytes = 0; 6002 comb->sadb_comb_hard_bytes = 0; 6003 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 6004 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 6005 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 6006 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 6007 } 6008 6009 /* 6010 * XXX reorder combinations by preference 6011 * XXX no idea if the user wants ESP authentication or not 6012 */ 6013 static struct mbuf * 6014 key_getcomb_esp(void) 6015 { 6016 struct sadb_comb *comb; 6017 const struct enc_xform *algo; 6018 struct mbuf *result = NULL, *m, *n; 6019 int encmin; 6020 int i, off, o; 6021 int totlen; 6022 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6023 6024 m = NULL; 6025 for (i = 1; i <= SADB_EALG_MAX; i++) { 6026 algo = esp_algorithm_lookup(i); 6027 if (algo == NULL) 6028 continue; 6029 6030 /* discard algorithms with key size smaller than system min */ 6031 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 6032 continue; 6033 if (_BITS(algo->minkey) < ipsec_esp_keymin) 6034 encmin = ipsec_esp_keymin; 6035 else 6036 encmin = _BITS(algo->minkey); 6037 6038 if (ipsec_esp_auth) 6039 m = key_getcomb_ah(); 6040 else { 6041 IPSEC_ASSERT(l <= MLEN, 6042 ("key_getcomb_esp: l=%u > MLEN=%lu", 6043 l, (u_long) MLEN)); 6044 MGET(m, M_DONTWAIT, MT_DATA); 6045 if (m) { 6046 M_ALIGN(m, l); 6047 m->m_len = l; 6048 m->m_next = NULL; 6049 memset(mtod(m, void *), 0, m->m_len); 6050 } 6051 } 6052 if (!m) 6053 goto fail; 6054 6055 totlen = 0; 6056 for (n = m; n; n = n->m_next) 6057 totlen += n->m_len; 6058 IPSEC_ASSERT((totlen % l) == 0, 6059 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 6060 6061 for (off = 0; off < totlen; off += l) { 6062 n = m_pulldown(m, off, l, &o); 6063 if (!n) { 6064 /* m is already freed */ 6065 goto fail; 6066 } 6067 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6068 memset(comb, 0, sizeof(*comb)); 6069 key_getcomb_setlifetime(comb); 6070 comb->sadb_comb_encrypt = i; 6071 comb->sadb_comb_encrypt_minbits = encmin; 6072 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6073 } 6074 6075 if (!result) 6076 result = m; 6077 else 6078 m_cat(result, m); 6079 } 6080 6081 return result; 6082 6083 fail: 6084 if (result) 6085 m_freem(result); 6086 return NULL; 6087 } 6088 6089 static void 6090 key_getsizes_ah(const struct auth_hash *ah, int alg, 6091 u_int16_t* ksmin, u_int16_t* ksmax) 6092 { 6093 *ksmin = *ksmax = ah->keysize; 6094 if (ah->keysize == 0) { 6095 /* 6096 * Transform takes arbitrary key size but algorithm 6097 * key size is restricted. Enforce this here. 6098 */ 6099 switch (alg) { 6100 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6101 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6102 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 6103 default: 6104 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 6105 alg)); 6106 break; 6107 } 6108 } 6109 } 6110 6111 /* 6112 * XXX reorder combinations by preference 6113 */ 6114 static struct mbuf * 6115 key_getcomb_ah(void) 6116 { 6117 struct sadb_comb *comb; 6118 const struct auth_hash *algo; 6119 struct mbuf *m; 6120 u_int16_t minkeysize, maxkeysize; 6121 int i; 6122 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6123 6124 m = NULL; 6125 for (i = 1; i <= SADB_AALG_MAX; i++) { 6126 #if 1 6127 /* we prefer HMAC algorithms, not old algorithms */ 6128 if (i != SADB_AALG_SHA1HMAC && 6129 i != SADB_AALG_MD5HMAC && 6130 i != SADB_X_AALG_SHA2_256 && 6131 i != SADB_X_AALG_SHA2_384 && 6132 i != SADB_X_AALG_SHA2_512) 6133 continue; 6134 #endif 6135 algo = ah_algorithm_lookup(i); 6136 if (!algo) 6137 continue; 6138 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6139 /* discard algorithms with key size smaller than system min */ 6140 if (_BITS(minkeysize) < ipsec_ah_keymin) 6141 continue; 6142 6143 if (!m) { 6144 IPSEC_ASSERT(l <= MLEN, 6145 ("key_getcomb_ah: l=%u > MLEN=%lu", 6146 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_auth = i; 6162 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6163 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6164 } 6165 6166 return m; 6167 } 6168 6169 /* 6170 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6171 * XXX reorder combinations by preference 6172 */ 6173 static struct mbuf * 6174 key_getcomb_ipcomp(void) 6175 { 6176 struct sadb_comb *comb; 6177 const struct comp_algo *algo; 6178 struct mbuf *m; 6179 int i; 6180 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6181 6182 m = NULL; 6183 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6184 algo = ipcomp_algorithm_lookup(i); 6185 if (!algo) 6186 continue; 6187 6188 if (!m) { 6189 IPSEC_ASSERT(l <= MLEN, 6190 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 6191 l, (u_long) MLEN)); 6192 MGET(m, M_DONTWAIT, MT_DATA); 6193 if (m) { 6194 M_ALIGN(m, l); 6195 m->m_len = l; 6196 m->m_next = NULL; 6197 } 6198 } else 6199 M_PREPEND(m, l, M_DONTWAIT); 6200 if (!m) 6201 return NULL; 6202 6203 comb = mtod(m, struct sadb_comb *); 6204 memset(comb, 0, sizeof(*comb)); 6205 key_getcomb_setlifetime(comb); 6206 comb->sadb_comb_encrypt = i; 6207 /* what should we set into sadb_comb_*_{min,max}bits? */ 6208 } 6209 6210 return m; 6211 } 6212 6213 /* 6214 * XXX no way to pass mode (transport/tunnel) to userland 6215 * XXX replay checking? 6216 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6217 */ 6218 static struct mbuf * 6219 key_getprop(const struct secasindex *saidx) 6220 { 6221 struct sadb_prop *prop; 6222 struct mbuf *m, *n; 6223 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6224 int totlen; 6225 6226 switch (saidx->proto) { 6227 case IPPROTO_ESP: 6228 m = key_getcomb_esp(); 6229 break; 6230 case IPPROTO_AH: 6231 m = key_getcomb_ah(); 6232 break; 6233 case IPPROTO_IPCOMP: 6234 m = key_getcomb_ipcomp(); 6235 break; 6236 default: 6237 return NULL; 6238 } 6239 6240 if (!m) 6241 return NULL; 6242 M_PREPEND(m, l, M_DONTWAIT); 6243 if (!m) 6244 return NULL; 6245 6246 totlen = 0; 6247 for (n = m; n; n = n->m_next) 6248 totlen += n->m_len; 6249 6250 prop = mtod(m, struct sadb_prop *); 6251 memset(prop, 0, sizeof(*prop)); 6252 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6253 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6254 prop->sadb_prop_replay = 32; /* XXX */ 6255 6256 return m; 6257 } 6258 6259 /* 6260 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6261 * send 6262 * <base, SA, address(SD), (address(P)), x_policy, 6263 * (identity(SD),) (sensitivity,) proposal> 6264 * to KMD, and expect to receive 6265 * <base> with SADB_ACQUIRE if error occurred, 6266 * or 6267 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6268 * from KMD by PF_KEY. 6269 * 6270 * XXX x_policy is outside of RFC2367 (KAME extension). 6271 * XXX sensitivity is not supported. 6272 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6273 * see comment for key_getcomb_ipcomp(). 6274 * 6275 * OUT: 6276 * 0 : succeed 6277 * others: error number 6278 */ 6279 static int 6280 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6281 { 6282 struct mbuf *result = NULL, *m; 6283 #ifndef IPSEC_NONBLOCK_ACQUIRE 6284 struct secacq *newacq; 6285 #endif 6286 u_int8_t satype; 6287 int error = -1; 6288 u_int32_t seq; 6289 6290 /* sanity check */ 6291 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 6292 satype = key_proto2satype(saidx->proto); 6293 IPSEC_ASSERT(satype != 0, 6294 ("key_acquire: null satype, protocol %u", saidx->proto)); 6295 6296 #ifndef IPSEC_NONBLOCK_ACQUIRE 6297 /* 6298 * We never do anything about acquirng SA. There is anather 6299 * solution that kernel blocks to send SADB_ACQUIRE message until 6300 * getting something message from IKEd. In later case, to be 6301 * managed with ACQUIRING list. 6302 */ 6303 /* Get an entry to check whether sending message or not. */ 6304 if ((newacq = key_getacq(saidx)) != NULL) { 6305 if (key_blockacq_count < newacq->count) { 6306 /* reset counter and do send message. */ 6307 newacq->count = 0; 6308 } else { 6309 /* increment counter and do nothing. */ 6310 newacq->count++; 6311 return 0; 6312 } 6313 } else { 6314 /* make new entry for blocking to send SADB_ACQUIRE. */ 6315 if ((newacq = key_newacq(saidx)) == NULL) 6316 return ENOBUFS; 6317 6318 /* add to acqtree */ 6319 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6320 } 6321 #endif 6322 6323 6324 #ifndef IPSEC_NONBLOCK_ACQUIRE 6325 seq = newacq->seq; 6326 #else 6327 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6328 #endif 6329 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6330 if (!m) { 6331 error = ENOBUFS; 6332 goto fail; 6333 } 6334 result = m; 6335 6336 /* set sadb_address for saidx's. */ 6337 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6338 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6339 if (!m) { 6340 error = ENOBUFS; 6341 goto fail; 6342 } 6343 m_cat(result, m); 6344 6345 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6346 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6347 if (!m) { 6348 error = ENOBUFS; 6349 goto fail; 6350 } 6351 m_cat(result, m); 6352 6353 /* XXX proxy address (optional) */ 6354 6355 /* set sadb_x_policy */ 6356 if (sp) { 6357 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6358 if (!m) { 6359 error = ENOBUFS; 6360 goto fail; 6361 } 6362 m_cat(result, m); 6363 } 6364 6365 /* XXX identity (optional) */ 6366 #if 0 6367 if (idexttype && fqdn) { 6368 /* create identity extension (FQDN) */ 6369 struct sadb_ident *id; 6370 int fqdnlen; 6371 6372 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6373 id = (struct sadb_ident *)p; 6374 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6375 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6376 id->sadb_ident_exttype = idexttype; 6377 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6378 memcpy(id + 1, fqdn, fqdnlen); 6379 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6380 } 6381 6382 if (idexttype) { 6383 /* create identity extension (USERFQDN) */ 6384 struct sadb_ident *id; 6385 int userfqdnlen; 6386 6387 if (userfqdn) { 6388 /* +1 for terminating-NUL */ 6389 userfqdnlen = strlen(userfqdn) + 1; 6390 } else 6391 userfqdnlen = 0; 6392 id = (struct sadb_ident *)p; 6393 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6394 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6395 id->sadb_ident_exttype = idexttype; 6396 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6397 /* XXX is it correct? */ 6398 if (curlwp) 6399 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6400 if (userfqdn && userfqdnlen) 6401 memcpy(id + 1, userfqdn, userfqdnlen); 6402 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6403 } 6404 #endif 6405 6406 /* XXX sensitivity (optional) */ 6407 6408 /* create proposal/combination extension */ 6409 m = key_getprop(saidx); 6410 #if 0 6411 /* 6412 * spec conformant: always attach proposal/combination extension, 6413 * the problem is that we have no way to attach it for ipcomp, 6414 * due to the way sadb_comb is declared in RFC2367. 6415 */ 6416 if (!m) { 6417 error = ENOBUFS; 6418 goto fail; 6419 } 6420 m_cat(result, m); 6421 #else 6422 /* 6423 * outside of spec; make proposal/combination extension optional. 6424 */ 6425 if (m) 6426 m_cat(result, m); 6427 #endif 6428 6429 if ((result->m_flags & M_PKTHDR) == 0) { 6430 error = EINVAL; 6431 goto fail; 6432 } 6433 6434 if (result->m_len < sizeof(struct sadb_msg)) { 6435 result = m_pullup(result, sizeof(struct sadb_msg)); 6436 if (result == NULL) { 6437 error = ENOBUFS; 6438 goto fail; 6439 } 6440 } 6441 6442 result->m_pkthdr.len = 0; 6443 for (m = result; m; m = m->m_next) 6444 result->m_pkthdr.len += m->m_len; 6445 6446 mtod(result, struct sadb_msg *)->sadb_msg_len = 6447 PFKEY_UNIT64(result->m_pkthdr.len); 6448 6449 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6450 6451 fail: 6452 if (result) 6453 m_freem(result); 6454 return error; 6455 } 6456 6457 #ifndef IPSEC_NONBLOCK_ACQUIRE 6458 static struct secacq * 6459 key_newacq(const struct secasindex *saidx) 6460 { 6461 struct secacq *newacq; 6462 6463 /* get new entry */ 6464 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6465 if (newacq == NULL) { 6466 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6467 return NULL; 6468 } 6469 memset(newacq, 0, sizeof(*newacq)); 6470 6471 /* copy secindex */ 6472 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6473 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6474 newacq->created = time_uptime; 6475 newacq->count = 0; 6476 6477 return newacq; 6478 } 6479 6480 static struct secacq * 6481 key_getacq(const struct secasindex *saidx) 6482 { 6483 struct secacq *acq; 6484 6485 LIST_FOREACH(acq, &acqtree, chain) { 6486 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6487 return acq; 6488 } 6489 6490 return NULL; 6491 } 6492 6493 static struct secacq * 6494 key_getacqbyseq(u_int32_t seq) 6495 { 6496 struct secacq *acq; 6497 6498 LIST_FOREACH(acq, &acqtree, chain) { 6499 if (acq->seq == seq) 6500 return acq; 6501 } 6502 6503 return NULL; 6504 } 6505 #endif 6506 6507 static struct secspacq * 6508 key_newspacq(const struct secpolicyindex *spidx) 6509 { 6510 struct secspacq *acq; 6511 6512 /* get new entry */ 6513 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6514 if (acq == NULL) { 6515 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6516 return NULL; 6517 } 6518 memset(acq, 0, sizeof(*acq)); 6519 6520 /* copy secindex */ 6521 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6522 acq->created = time_uptime; 6523 acq->count = 0; 6524 6525 return acq; 6526 } 6527 6528 static struct secspacq * 6529 key_getspacq(const struct secpolicyindex *spidx) 6530 { 6531 struct secspacq *acq; 6532 6533 LIST_FOREACH(acq, &spacqtree, chain) { 6534 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6535 return acq; 6536 } 6537 6538 return NULL; 6539 } 6540 6541 /* 6542 * SADB_ACQUIRE processing, 6543 * in first situation, is receiving 6544 * <base> 6545 * from the ikmpd, and clear sequence of its secasvar entry. 6546 * 6547 * In second situation, is receiving 6548 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6549 * from a user land process, and return 6550 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6551 * to the socket. 6552 * 6553 * m will always be freed. 6554 */ 6555 static int 6556 key_acquire2(struct socket *so, struct mbuf *m, 6557 const struct sadb_msghdr *mhp) 6558 { 6559 const struct sadb_address *src0, *dst0; 6560 struct secasindex saidx; 6561 struct secashead *sah; 6562 u_int16_t proto; 6563 int error; 6564 6565 /* sanity check */ 6566 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6567 panic("key_acquire2: NULL pointer is passed"); 6568 6569 /* 6570 * Error message from KMd. 6571 * We assume that if error was occurred in IKEd, the length of PFKEY 6572 * message is equal to the size of sadb_msg structure. 6573 * We do not raise error even if error occurred in this function. 6574 */ 6575 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6576 #ifndef IPSEC_NONBLOCK_ACQUIRE 6577 struct secacq *acq; 6578 6579 /* check sequence number */ 6580 if (mhp->msg->sadb_msg_seq == 0) { 6581 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6582 m_freem(m); 6583 return 0; 6584 } 6585 6586 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6587 /* 6588 * the specified larval SA is already gone, or we got 6589 * a bogus sequence number. we can silently ignore it. 6590 */ 6591 m_freem(m); 6592 return 0; 6593 } 6594 6595 /* reset acq counter in order to deletion by timehander. */ 6596 acq->created = time_uptime; 6597 acq->count = 0; 6598 #endif 6599 m_freem(m); 6600 return 0; 6601 } 6602 6603 /* 6604 * This message is from user land. 6605 */ 6606 6607 /* map satype to proto */ 6608 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6609 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6610 return key_senderror(so, m, EINVAL); 6611 } 6612 6613 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6614 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6615 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6616 /* error */ 6617 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6618 return key_senderror(so, m, EINVAL); 6619 } 6620 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6621 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6622 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6623 /* error */ 6624 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6625 return key_senderror(so, m, EINVAL); 6626 } 6627 6628 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6629 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6630 6631 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 6632 dst0 + 1, &saidx)) != 0) 6633 return key_senderror(so, m, EINVAL); 6634 6635 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 6636 return key_senderror(so, m, EINVAL); 6637 6638 /* get a SA index */ 6639 LIST_FOREACH(sah, &sahtree, chain) { 6640 if (sah->state == SADB_SASTATE_DEAD) 6641 continue; 6642 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6643 break; 6644 } 6645 if (sah != NULL) { 6646 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6647 return key_senderror(so, m, EEXIST); 6648 } 6649 6650 error = key_acquire(&saidx, NULL); 6651 if (error != 0) { 6652 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6653 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6654 return key_senderror(so, m, error); 6655 } 6656 6657 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6658 } 6659 6660 /* 6661 * SADB_REGISTER processing. 6662 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6663 * receive 6664 * <base> 6665 * from the ikmpd, and register a socket to send PF_KEY messages, 6666 * and send 6667 * <base, supported> 6668 * to KMD by PF_KEY. 6669 * If socket is detached, must free from regnode. 6670 * 6671 * m will always be freed. 6672 */ 6673 static int 6674 key_register(struct socket *so, struct mbuf *m, 6675 const struct sadb_msghdr *mhp) 6676 { 6677 struct secreg *reg, *newreg = 0; 6678 6679 /* sanity check */ 6680 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6681 panic("key_register: NULL pointer is passed"); 6682 6683 /* check for invalid register message */ 6684 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6685 return key_senderror(so, m, EINVAL); 6686 6687 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6688 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6689 goto setmsg; 6690 6691 /* check whether existing or not */ 6692 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6693 if (reg->so == so) { 6694 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6695 return key_senderror(so, m, EEXIST); 6696 } 6697 } 6698 6699 /* create regnode */ 6700 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6701 if (newreg == NULL) { 6702 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6703 return key_senderror(so, m, ENOBUFS); 6704 } 6705 memset(newreg, 0, sizeof(*newreg)); 6706 6707 newreg->so = so; 6708 ((struct keycb *)sotorawcb(so))->kp_registered++; 6709 6710 /* add regnode to regtree. */ 6711 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6712 6713 setmsg: 6714 { 6715 struct mbuf *n; 6716 struct sadb_msg *newmsg; 6717 struct sadb_supported *sup; 6718 u_int len, alen, elen; 6719 int off; 6720 int i; 6721 struct sadb_alg *alg; 6722 6723 /* create new sadb_msg to reply. */ 6724 alen = 0; 6725 for (i = 1; i <= SADB_AALG_MAX; i++) { 6726 if (ah_algorithm_lookup(i)) 6727 alen += sizeof(struct sadb_alg); 6728 } 6729 if (alen) 6730 alen += sizeof(struct sadb_supported); 6731 elen = 0; 6732 for (i = 1; i <= SADB_EALG_MAX; i++) { 6733 if (esp_algorithm_lookup(i)) 6734 elen += sizeof(struct sadb_alg); 6735 } 6736 if (elen) 6737 elen += sizeof(struct sadb_supported); 6738 6739 len = sizeof(struct sadb_msg) + alen + elen; 6740 6741 if (len > MCLBYTES) 6742 return key_senderror(so, m, ENOBUFS); 6743 6744 MGETHDR(n, M_DONTWAIT, MT_DATA); 6745 if (len > MHLEN) { 6746 MCLGET(n, M_DONTWAIT); 6747 if ((n->m_flags & M_EXT) == 0) { 6748 m_freem(n); 6749 n = NULL; 6750 } 6751 } 6752 if (!n) 6753 return key_senderror(so, m, ENOBUFS); 6754 6755 n->m_pkthdr.len = n->m_len = len; 6756 n->m_next = NULL; 6757 off = 0; 6758 6759 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6760 newmsg = mtod(n, struct sadb_msg *); 6761 newmsg->sadb_msg_errno = 0; 6762 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6763 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6764 6765 /* for authentication algorithm */ 6766 if (alen) { 6767 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6768 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6769 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6770 off += PFKEY_ALIGN8(sizeof(*sup)); 6771 6772 for (i = 1; i <= SADB_AALG_MAX; i++) { 6773 const struct auth_hash *aalgo; 6774 u_int16_t minkeysize, maxkeysize; 6775 6776 aalgo = ah_algorithm_lookup(i); 6777 if (!aalgo) 6778 continue; 6779 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6780 alg->sadb_alg_id = i; 6781 alg->sadb_alg_ivlen = 0; 6782 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6783 alg->sadb_alg_minbits = _BITS(minkeysize); 6784 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6785 off += PFKEY_ALIGN8(sizeof(*alg)); 6786 } 6787 } 6788 6789 /* for encryption algorithm */ 6790 if (elen) { 6791 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6792 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6793 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6794 off += PFKEY_ALIGN8(sizeof(*sup)); 6795 6796 for (i = 1; i <= SADB_EALG_MAX; i++) { 6797 const struct enc_xform *ealgo; 6798 6799 ealgo = esp_algorithm_lookup(i); 6800 if (!ealgo) 6801 continue; 6802 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6803 alg->sadb_alg_id = i; 6804 alg->sadb_alg_ivlen = ealgo->blocksize; 6805 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6806 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6807 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6808 } 6809 } 6810 6811 #ifdef DIAGNOSTIC 6812 if (off != len) 6813 panic("length assumption failed in key_register"); 6814 #endif 6815 6816 m_freem(m); 6817 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6818 } 6819 } 6820 6821 /* 6822 * free secreg entry registered. 6823 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6824 */ 6825 void 6826 key_freereg(struct socket *so) 6827 { 6828 struct secreg *reg; 6829 int i; 6830 6831 /* sanity check */ 6832 if (so == NULL) 6833 panic("key_freereg: NULL pointer is passed"); 6834 6835 /* 6836 * check whether existing or not. 6837 * check all type of SA, because there is a potential that 6838 * one socket is registered to multiple type of SA. 6839 */ 6840 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6841 LIST_FOREACH(reg, ®tree[i], chain) { 6842 if (reg->so == so 6843 && __LIST_CHAINED(reg)) { 6844 LIST_REMOVE(reg, chain); 6845 KFREE(reg); 6846 break; 6847 } 6848 } 6849 } 6850 6851 return; 6852 } 6853 6854 /* 6855 * SADB_EXPIRE processing 6856 * send 6857 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6858 * to KMD by PF_KEY. 6859 * NOTE: We send only soft lifetime extension. 6860 * 6861 * OUT: 0 : succeed 6862 * others : error number 6863 */ 6864 static int 6865 key_expire(struct secasvar *sav) 6866 { 6867 int s; 6868 int satype; 6869 struct mbuf *result = NULL, *m; 6870 int len; 6871 int error = -1; 6872 struct sadb_lifetime *lt; 6873 6874 /* XXX: Why do we lock ? */ 6875 s = splsoftnet(); /*called from softclock()*/ 6876 6877 /* sanity check */ 6878 if (sav == NULL) 6879 panic("key_expire: NULL pointer is passed"); 6880 if (sav->sah == NULL) 6881 panic("key_expire: Why was SA index in SA NULL"); 6882 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6883 panic("key_expire: invalid proto is passed"); 6884 6885 /* set msg header */ 6886 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6887 if (!m) { 6888 error = ENOBUFS; 6889 goto fail; 6890 } 6891 result = m; 6892 6893 /* create SA extension */ 6894 m = key_setsadbsa(sav); 6895 if (!m) { 6896 error = ENOBUFS; 6897 goto fail; 6898 } 6899 m_cat(result, m); 6900 6901 /* create SA extension */ 6902 m = key_setsadbxsa2(sav->sah->saidx.mode, 6903 sav->replay ? sav->replay->count : 0, 6904 sav->sah->saidx.reqid); 6905 if (!m) { 6906 error = ENOBUFS; 6907 goto fail; 6908 } 6909 m_cat(result, m); 6910 6911 /* create lifetime extension (current and soft) */ 6912 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6913 m = key_alloc_mbuf(len); 6914 if (!m || m->m_next) { /*XXX*/ 6915 if (m) 6916 m_freem(m); 6917 error = ENOBUFS; 6918 goto fail; 6919 } 6920 memset(mtod(m, void *), 0, len); 6921 lt = mtod(m, struct sadb_lifetime *); 6922 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6923 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6924 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6925 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6926 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime 6927 + time_second - time_uptime; 6928 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime 6929 + time_second - time_uptime; 6930 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6931 memcpy(lt, sav->lft_s, sizeof(*lt)); 6932 m_cat(result, m); 6933 6934 /* set sadb_address for source */ 6935 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6936 &sav->sah->saidx.src.sa, 6937 FULLMASK, IPSEC_ULPROTO_ANY); 6938 if (!m) { 6939 error = ENOBUFS; 6940 goto fail; 6941 } 6942 m_cat(result, m); 6943 6944 /* set sadb_address for destination */ 6945 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6946 &sav->sah->saidx.dst.sa, 6947 FULLMASK, IPSEC_ULPROTO_ANY); 6948 if (!m) { 6949 error = ENOBUFS; 6950 goto fail; 6951 } 6952 m_cat(result, m); 6953 6954 if ((result->m_flags & M_PKTHDR) == 0) { 6955 error = EINVAL; 6956 goto fail; 6957 } 6958 6959 if (result->m_len < sizeof(struct sadb_msg)) { 6960 result = m_pullup(result, sizeof(struct sadb_msg)); 6961 if (result == NULL) { 6962 error = ENOBUFS; 6963 goto fail; 6964 } 6965 } 6966 6967 result->m_pkthdr.len = 0; 6968 for (m = result; m; m = m->m_next) 6969 result->m_pkthdr.len += m->m_len; 6970 6971 mtod(result, struct sadb_msg *)->sadb_msg_len = 6972 PFKEY_UNIT64(result->m_pkthdr.len); 6973 6974 splx(s); 6975 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6976 6977 fail: 6978 if (result) 6979 m_freem(result); 6980 splx(s); 6981 return error; 6982 } 6983 6984 /* 6985 * SADB_FLUSH processing 6986 * receive 6987 * <base> 6988 * from the ikmpd, and free all entries in secastree. 6989 * and send, 6990 * <base> 6991 * to the ikmpd. 6992 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6993 * 6994 * m will always be freed. 6995 */ 6996 static int 6997 key_flush(struct socket *so, struct mbuf *m, 6998 const struct sadb_msghdr *mhp) 6999 { 7000 struct sadb_msg *newmsg; 7001 struct secashead *sah, *nextsah; 7002 struct secasvar *sav, *nextsav; 7003 u_int16_t proto; 7004 u_int8_t state; 7005 u_int stateidx; 7006 7007 /* sanity check */ 7008 if (so == NULL || mhp == NULL || mhp->msg == NULL) 7009 panic("key_flush: NULL pointer is passed"); 7010 7011 /* map satype to proto */ 7012 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7013 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 7014 return key_senderror(so, m, EINVAL); 7015 } 7016 7017 /* no SATYPE specified, i.e. flushing all SA. */ 7018 for (sah = LIST_FIRST(&sahtree); 7019 sah != NULL; 7020 sah = nextsah) { 7021 nextsah = LIST_NEXT(sah, chain); 7022 7023 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7024 && proto != sah->saidx.proto) 7025 continue; 7026 7027 for (stateidx = 0; 7028 stateidx < _ARRAYLEN(saorder_state_alive); 7029 stateidx++) { 7030 state = saorder_state_any[stateidx]; 7031 for (sav = LIST_FIRST(&sah->savtree[state]); 7032 sav != NULL; 7033 sav = nextsav) { 7034 7035 nextsav = LIST_NEXT(sav, chain); 7036 7037 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7038 KEY_FREESAV(&sav); 7039 } 7040 } 7041 7042 sah->state = SADB_SASTATE_DEAD; 7043 } 7044 7045 if (m->m_len < sizeof(struct sadb_msg) || 7046 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7047 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 7048 return key_senderror(so, m, ENOBUFS); 7049 } 7050 7051 if (m->m_next) 7052 m_freem(m->m_next); 7053 m->m_next = NULL; 7054 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7055 newmsg = mtod(m, struct sadb_msg *); 7056 newmsg->sadb_msg_errno = 0; 7057 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7058 7059 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7060 } 7061 7062 7063 static struct mbuf * 7064 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 7065 { 7066 struct secashead *sah; 7067 struct secasvar *sav; 7068 u_int16_t proto; 7069 u_int stateidx; 7070 u_int8_t satype; 7071 u_int8_t state; 7072 int cnt; 7073 struct mbuf *m, *n, *prev; 7074 7075 *lenp = 0; 7076 7077 /* map satype to proto */ 7078 if ((proto = key_satype2proto(req_satype)) == 0) { 7079 *errorp = EINVAL; 7080 return (NULL); 7081 } 7082 7083 /* count sav entries to be sent to userland. */ 7084 cnt = 0; 7085 LIST_FOREACH(sah, &sahtree, chain) { 7086 if (req_satype != SADB_SATYPE_UNSPEC && 7087 proto != sah->saidx.proto) 7088 continue; 7089 7090 for (stateidx = 0; 7091 stateidx < _ARRAYLEN(saorder_state_any); 7092 stateidx++) { 7093 state = saorder_state_any[stateidx]; 7094 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7095 cnt++; 7096 } 7097 } 7098 } 7099 7100 if (cnt == 0) { 7101 *errorp = ENOENT; 7102 return (NULL); 7103 } 7104 7105 /* send this to the userland, one at a time. */ 7106 m = NULL; 7107 prev = m; 7108 LIST_FOREACH(sah, &sahtree, chain) { 7109 if (req_satype != SADB_SATYPE_UNSPEC && 7110 proto != sah->saidx.proto) 7111 continue; 7112 7113 /* map proto to satype */ 7114 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7115 m_freem(m); 7116 *errorp = EINVAL; 7117 return (NULL); 7118 } 7119 7120 for (stateidx = 0; 7121 stateidx < _ARRAYLEN(saorder_state_any); 7122 stateidx++) { 7123 state = saorder_state_any[stateidx]; 7124 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7125 n = key_setdumpsa(sav, SADB_DUMP, satype, 7126 --cnt, pid); 7127 if (!n) { 7128 m_freem(m); 7129 *errorp = ENOBUFS; 7130 return (NULL); 7131 } 7132 7133 if (!m) 7134 m = n; 7135 else 7136 prev->m_nextpkt = n; 7137 prev = n; 7138 } 7139 } 7140 } 7141 7142 if (!m) { 7143 *errorp = EINVAL; 7144 return (NULL); 7145 } 7146 7147 if ((m->m_flags & M_PKTHDR) != 0) { 7148 m->m_pkthdr.len = 0; 7149 for (n = m; n; n = n->m_next) 7150 m->m_pkthdr.len += n->m_len; 7151 } 7152 7153 *errorp = 0; 7154 return (m); 7155 } 7156 7157 /* 7158 * SADB_DUMP processing 7159 * dump all entries including status of DEAD in SAD. 7160 * receive 7161 * <base> 7162 * from the ikmpd, and dump all secasvar leaves 7163 * and send, 7164 * <base> ..... 7165 * to the ikmpd. 7166 * 7167 * m will always be freed. 7168 */ 7169 static int 7170 key_dump(struct socket *so, struct mbuf *m0, 7171 const struct sadb_msghdr *mhp) 7172 { 7173 u_int16_t proto; 7174 u_int8_t satype; 7175 struct mbuf *n; 7176 int s; 7177 int error, len, ok; 7178 7179 /* sanity check */ 7180 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 7181 panic("key_dump: NULL pointer is passed"); 7182 7183 /* map satype to proto */ 7184 satype = mhp->msg->sadb_msg_satype; 7185 if ((proto = key_satype2proto(satype)) == 0) { 7186 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 7187 return key_senderror(so, m0, EINVAL); 7188 } 7189 7190 /* 7191 * If the requestor has insufficient socket-buffer space 7192 * for the entire chain, nobody gets any response to the DUMP. 7193 * XXX For now, only the requestor ever gets anything. 7194 * Moreover, if the requestor has any space at all, they receive 7195 * the entire chain, otherwise the request is refused with ENOBUFS. 7196 */ 7197 if (sbspace(&so->so_rcv) <= 0) { 7198 return key_senderror(so, m0, ENOBUFS); 7199 } 7200 7201 s = splsoftnet(); 7202 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7203 splx(s); 7204 7205 if (n == NULL) { 7206 return key_senderror(so, m0, ENOENT); 7207 } 7208 { 7209 uint64_t *ps = PFKEY_STAT_GETREF(); 7210 ps[PFKEY_STAT_IN_TOTAL]++; 7211 ps[PFKEY_STAT_IN_BYTES] += len; 7212 PFKEY_STAT_PUTREF(); 7213 } 7214 7215 /* 7216 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7217 * The requestor receives either the entire chain, or an 7218 * error message with ENOBUFS. 7219 * 7220 * sbappendaddrchain() takes the chain of entries, one 7221 * packet-record per SPD entry, prepends the key_src sockaddr 7222 * to each packet-record, links the sockaddr mbufs into a new 7223 * list of records, then appends the entire resulting 7224 * list to the requesting socket. 7225 */ 7226 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 7227 n, SB_PRIO_ONESHOT_OVERFLOW); 7228 7229 if (!ok) { 7230 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7231 m_freem(n); 7232 return key_senderror(so, m0, ENOBUFS); 7233 } 7234 7235 m_freem(m0); 7236 return 0; 7237 } 7238 7239 /* 7240 * SADB_X_PROMISC processing 7241 * 7242 * m will always be freed. 7243 */ 7244 static int 7245 key_promisc(struct socket *so, struct mbuf *m, 7246 const struct sadb_msghdr *mhp) 7247 { 7248 int olen; 7249 7250 /* sanity check */ 7251 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 7252 panic("key_promisc: NULL pointer is passed"); 7253 7254 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7255 7256 if (olen < sizeof(struct sadb_msg)) { 7257 #if 1 7258 return key_senderror(so, m, EINVAL); 7259 #else 7260 m_freem(m); 7261 return 0; 7262 #endif 7263 } else if (olen == sizeof(struct sadb_msg)) { 7264 /* enable/disable promisc mode */ 7265 struct keycb *kp; 7266 7267 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7268 return key_senderror(so, m, EINVAL); 7269 mhp->msg->sadb_msg_errno = 0; 7270 switch (mhp->msg->sadb_msg_satype) { 7271 case 0: 7272 case 1: 7273 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7274 break; 7275 default: 7276 return key_senderror(so, m, EINVAL); 7277 } 7278 7279 /* send the original message back to everyone */ 7280 mhp->msg->sadb_msg_errno = 0; 7281 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7282 } else { 7283 /* send packet as is */ 7284 7285 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7286 7287 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7288 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7289 } 7290 } 7291 7292 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7293 const struct sadb_msghdr *) = { 7294 NULL, /* SADB_RESERVED */ 7295 key_getspi, /* SADB_GETSPI */ 7296 key_update, /* SADB_UPDATE */ 7297 key_add, /* SADB_ADD */ 7298 key_delete, /* SADB_DELETE */ 7299 key_get, /* SADB_GET */ 7300 key_acquire2, /* SADB_ACQUIRE */ 7301 key_register, /* SADB_REGISTER */ 7302 NULL, /* SADB_EXPIRE */ 7303 key_flush, /* SADB_FLUSH */ 7304 key_dump, /* SADB_DUMP */ 7305 key_promisc, /* SADB_X_PROMISC */ 7306 NULL, /* SADB_X_PCHANGE */ 7307 key_spdadd, /* SADB_X_SPDUPDATE */ 7308 key_spdadd, /* SADB_X_SPDADD */ 7309 key_spddelete, /* SADB_X_SPDDELETE */ 7310 key_spdget, /* SADB_X_SPDGET */ 7311 NULL, /* SADB_X_SPDACQUIRE */ 7312 key_spddump, /* SADB_X_SPDDUMP */ 7313 key_spdflush, /* SADB_X_SPDFLUSH */ 7314 key_spdadd, /* SADB_X_SPDSETIDX */ 7315 NULL, /* SADB_X_SPDEXPIRE */ 7316 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7317 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7318 }; 7319 7320 /* 7321 * parse sadb_msg buffer to process PFKEYv2, 7322 * and create a data to response if needed. 7323 * I think to be dealed with mbuf directly. 7324 * IN: 7325 * msgp : pointer to pointer to a received buffer pulluped. 7326 * This is rewrited to response. 7327 * so : pointer to socket. 7328 * OUT: 7329 * length for buffer to send to user process. 7330 */ 7331 int 7332 key_parse(struct mbuf *m, struct socket *so) 7333 { 7334 struct sadb_msg *msg; 7335 struct sadb_msghdr mh; 7336 int error; 7337 int target; 7338 7339 /* sanity check */ 7340 if (m == NULL || so == NULL) 7341 panic("key_parse: NULL pointer is passed"); 7342 7343 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7344 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7345 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 7346 kdebug_sadb(msg)); 7347 #endif 7348 7349 if (m->m_len < sizeof(struct sadb_msg)) { 7350 m = m_pullup(m, sizeof(struct sadb_msg)); 7351 if (!m) 7352 return ENOBUFS; 7353 } 7354 msg = mtod(m, struct sadb_msg *); 7355 target = KEY_SENDUP_ONE; 7356 7357 if ((m->m_flags & M_PKTHDR) == 0 || 7358 m->m_pkthdr.len != m->m_pkthdr.len) { 7359 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 7360 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7361 error = EINVAL; 7362 goto senderror; 7363 } 7364 7365 if (msg->sadb_msg_version != PF_KEY_V2) { 7366 ipseclog((LOG_DEBUG, 7367 "key_parse: PF_KEY version %u is mismatched.\n", 7368 msg->sadb_msg_version)); 7369 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7370 error = EINVAL; 7371 goto senderror; 7372 } 7373 7374 if (msg->sadb_msg_type > SADB_MAX) { 7375 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7376 msg->sadb_msg_type)); 7377 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7378 error = EINVAL; 7379 goto senderror; 7380 } 7381 7382 /* for old-fashioned code - should be nuked */ 7383 if (m->m_pkthdr.len > MCLBYTES) { 7384 m_freem(m); 7385 return ENOBUFS; 7386 } 7387 if (m->m_next) { 7388 struct mbuf *n; 7389 7390 MGETHDR(n, M_DONTWAIT, MT_DATA); 7391 if (n && m->m_pkthdr.len > MHLEN) { 7392 MCLGET(n, M_DONTWAIT); 7393 if ((n->m_flags & M_EXT) == 0) { 7394 m_free(n); 7395 n = NULL; 7396 } 7397 } 7398 if (!n) { 7399 m_freem(m); 7400 return ENOBUFS; 7401 } 7402 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7403 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7404 n->m_next = NULL; 7405 m_freem(m); 7406 m = n; 7407 } 7408 7409 /* align the mbuf chain so that extensions are in contiguous region. */ 7410 error = key_align(m, &mh); 7411 if (error) 7412 return error; 7413 7414 if (m->m_next) { /*XXX*/ 7415 m_freem(m); 7416 return ENOBUFS; 7417 } 7418 7419 msg = mh.msg; 7420 7421 /* check SA type */ 7422 switch (msg->sadb_msg_satype) { 7423 case SADB_SATYPE_UNSPEC: 7424 switch (msg->sadb_msg_type) { 7425 case SADB_GETSPI: 7426 case SADB_UPDATE: 7427 case SADB_ADD: 7428 case SADB_DELETE: 7429 case SADB_GET: 7430 case SADB_ACQUIRE: 7431 case SADB_EXPIRE: 7432 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7433 "when msg type=%u.\n", msg->sadb_msg_type)); 7434 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7435 error = EINVAL; 7436 goto senderror; 7437 } 7438 break; 7439 case SADB_SATYPE_AH: 7440 case SADB_SATYPE_ESP: 7441 case SADB_X_SATYPE_IPCOMP: 7442 case SADB_X_SATYPE_TCPSIGNATURE: 7443 switch (msg->sadb_msg_type) { 7444 case SADB_X_SPDADD: 7445 case SADB_X_SPDDELETE: 7446 case SADB_X_SPDGET: 7447 case SADB_X_SPDDUMP: 7448 case SADB_X_SPDFLUSH: 7449 case SADB_X_SPDSETIDX: 7450 case SADB_X_SPDUPDATE: 7451 case SADB_X_SPDDELETE2: 7452 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7453 msg->sadb_msg_type)); 7454 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7455 error = EINVAL; 7456 goto senderror; 7457 } 7458 break; 7459 case SADB_SATYPE_RSVP: 7460 case SADB_SATYPE_OSPFV2: 7461 case SADB_SATYPE_RIPV2: 7462 case SADB_SATYPE_MIP: 7463 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7464 msg->sadb_msg_satype)); 7465 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7466 error = EOPNOTSUPP; 7467 goto senderror; 7468 case 1: /* XXX: What does it do? */ 7469 if (msg->sadb_msg_type == SADB_X_PROMISC) 7470 break; 7471 /*FALLTHROUGH*/ 7472 default: 7473 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7474 msg->sadb_msg_satype)); 7475 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7476 error = EINVAL; 7477 goto senderror; 7478 } 7479 7480 /* check field of upper layer protocol and address family */ 7481 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7482 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7483 struct sadb_address *src0, *dst0; 7484 u_int plen; 7485 7486 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7487 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7488 7489 /* check upper layer protocol */ 7490 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7491 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7492 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7493 error = EINVAL; 7494 goto senderror; 7495 } 7496 7497 /* check family */ 7498 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7499 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7500 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7501 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7502 error = EINVAL; 7503 goto senderror; 7504 } 7505 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7506 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7507 ipseclog((LOG_DEBUG, 7508 "key_parse: address struct size mismatched.\n")); 7509 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7510 error = EINVAL; 7511 goto senderror; 7512 } 7513 7514 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7515 case AF_INET: 7516 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7517 sizeof(struct sockaddr_in)) { 7518 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7519 error = EINVAL; 7520 goto senderror; 7521 } 7522 break; 7523 case AF_INET6: 7524 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7525 sizeof(struct sockaddr_in6)) { 7526 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7527 error = EINVAL; 7528 goto senderror; 7529 } 7530 break; 7531 default: 7532 ipseclog((LOG_DEBUG, 7533 "key_parse: unsupported address family.\n")); 7534 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7535 error = EAFNOSUPPORT; 7536 goto senderror; 7537 } 7538 7539 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7540 case AF_INET: 7541 plen = sizeof(struct in_addr) << 3; 7542 break; 7543 case AF_INET6: 7544 plen = sizeof(struct in6_addr) << 3; 7545 break; 7546 default: 7547 plen = 0; /*fool gcc*/ 7548 break; 7549 } 7550 7551 /* check max prefix length */ 7552 if (src0->sadb_address_prefixlen > plen || 7553 dst0->sadb_address_prefixlen > plen) { 7554 ipseclog((LOG_DEBUG, 7555 "key_parse: illegal prefixlen.\n")); 7556 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7557 error = EINVAL; 7558 goto senderror; 7559 } 7560 7561 /* 7562 * prefixlen == 0 is valid because there can be a case when 7563 * all addresses are matched. 7564 */ 7565 } 7566 7567 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7568 key_typesw[msg->sadb_msg_type] == NULL) { 7569 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7570 error = EINVAL; 7571 goto senderror; 7572 } 7573 7574 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7575 7576 senderror: 7577 msg->sadb_msg_errno = error; 7578 return key_sendup_mbuf(so, m, target); 7579 } 7580 7581 static int 7582 key_senderror(struct socket *so, struct mbuf *m, int code) 7583 { 7584 struct sadb_msg *msg; 7585 7586 if (m->m_len < sizeof(struct sadb_msg)) 7587 panic("invalid mbuf passed to key_senderror"); 7588 7589 msg = mtod(m, struct sadb_msg *); 7590 msg->sadb_msg_errno = code; 7591 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7592 } 7593 7594 /* 7595 * set the pointer to each header into message buffer. 7596 * m will be freed on error. 7597 * XXX larger-than-MCLBYTES extension? 7598 */ 7599 static int 7600 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7601 { 7602 struct mbuf *n; 7603 struct sadb_ext *ext; 7604 size_t off, end; 7605 int extlen; 7606 int toff; 7607 7608 /* sanity check */ 7609 if (m == NULL || mhp == NULL) 7610 panic("key_align: NULL pointer is passed"); 7611 if (m->m_len < sizeof(struct sadb_msg)) 7612 panic("invalid mbuf passed to key_align"); 7613 7614 /* initialize */ 7615 memset(mhp, 0, sizeof(*mhp)); 7616 7617 mhp->msg = mtod(m, struct sadb_msg *); 7618 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7619 7620 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7621 extlen = end; /*just in case extlen is not updated*/ 7622 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7623 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7624 if (!n) { 7625 /* m is already freed */ 7626 return ENOBUFS; 7627 } 7628 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7629 7630 /* set pointer */ 7631 switch (ext->sadb_ext_type) { 7632 case SADB_EXT_SA: 7633 case SADB_EXT_ADDRESS_SRC: 7634 case SADB_EXT_ADDRESS_DST: 7635 case SADB_EXT_ADDRESS_PROXY: 7636 case SADB_EXT_LIFETIME_CURRENT: 7637 case SADB_EXT_LIFETIME_HARD: 7638 case SADB_EXT_LIFETIME_SOFT: 7639 case SADB_EXT_KEY_AUTH: 7640 case SADB_EXT_KEY_ENCRYPT: 7641 case SADB_EXT_IDENTITY_SRC: 7642 case SADB_EXT_IDENTITY_DST: 7643 case SADB_EXT_SENSITIVITY: 7644 case SADB_EXT_PROPOSAL: 7645 case SADB_EXT_SUPPORTED_AUTH: 7646 case SADB_EXT_SUPPORTED_ENCRYPT: 7647 case SADB_EXT_SPIRANGE: 7648 case SADB_X_EXT_POLICY: 7649 case SADB_X_EXT_SA2: 7650 case SADB_X_EXT_NAT_T_TYPE: 7651 case SADB_X_EXT_NAT_T_SPORT: 7652 case SADB_X_EXT_NAT_T_DPORT: 7653 case SADB_X_EXT_NAT_T_OAI: 7654 case SADB_X_EXT_NAT_T_OAR: 7655 case SADB_X_EXT_NAT_T_FRAG: 7656 /* duplicate check */ 7657 /* 7658 * XXX Are there duplication payloads of either 7659 * KEY_AUTH or KEY_ENCRYPT ? 7660 */ 7661 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7662 ipseclog((LOG_DEBUG, 7663 "key_align: duplicate ext_type %u " 7664 "is passed.\n", ext->sadb_ext_type)); 7665 m_freem(m); 7666 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7667 return EINVAL; 7668 } 7669 break; 7670 default: 7671 ipseclog((LOG_DEBUG, 7672 "key_align: invalid ext_type %u is passed.\n", 7673 ext->sadb_ext_type)); 7674 m_freem(m); 7675 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7676 return EINVAL; 7677 } 7678 7679 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7680 7681 if (key_validate_ext(ext, extlen)) { 7682 m_freem(m); 7683 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7684 return EINVAL; 7685 } 7686 7687 n = m_pulldown(m, off, extlen, &toff); 7688 if (!n) { 7689 /* m is already freed */ 7690 return ENOBUFS; 7691 } 7692 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7693 7694 mhp->ext[ext->sadb_ext_type] = ext; 7695 mhp->extoff[ext->sadb_ext_type] = off; 7696 mhp->extlen[ext->sadb_ext_type] = extlen; 7697 } 7698 7699 if (off != end) { 7700 m_freem(m); 7701 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7702 return EINVAL; 7703 } 7704 7705 return 0; 7706 } 7707 7708 static int 7709 key_validate_ext(const struct sadb_ext *ext, int len) 7710 { 7711 const struct sockaddr *sa; 7712 enum { NONE, ADDR } checktype = NONE; 7713 int baselen = 0; 7714 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7715 7716 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7717 return EINVAL; 7718 7719 /* if it does not match minimum/maximum length, bail */ 7720 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7721 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7722 return EINVAL; 7723 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7724 return EINVAL; 7725 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7726 return EINVAL; 7727 7728 /* more checks based on sadb_ext_type XXX need more */ 7729 switch (ext->sadb_ext_type) { 7730 case SADB_EXT_ADDRESS_SRC: 7731 case SADB_EXT_ADDRESS_DST: 7732 case SADB_EXT_ADDRESS_PROXY: 7733 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7734 checktype = ADDR; 7735 break; 7736 case SADB_EXT_IDENTITY_SRC: 7737 case SADB_EXT_IDENTITY_DST: 7738 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7739 SADB_X_IDENTTYPE_ADDR) { 7740 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7741 checktype = ADDR; 7742 } else 7743 checktype = NONE; 7744 break; 7745 default: 7746 checktype = NONE; 7747 break; 7748 } 7749 7750 switch (checktype) { 7751 case NONE: 7752 break; 7753 case ADDR: 7754 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7755 if (len < baselen + sal) 7756 return EINVAL; 7757 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7758 return EINVAL; 7759 break; 7760 } 7761 7762 return 0; 7763 } 7764 7765 static int 7766 key_do_init(void) 7767 { 7768 int i; 7769 7770 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7771 7772 callout_init(&key_timehandler_ch, 0); 7773 7774 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7775 LIST_INIT(&sptree[i]); 7776 } 7777 7778 LIST_INIT(&sahtree); 7779 7780 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7781 LIST_INIT(®tree[i]); 7782 } 7783 7784 #ifndef IPSEC_NONBLOCK_ACQUIRE 7785 LIST_INIT(&acqtree); 7786 #endif 7787 LIST_INIT(&spacqtree); 7788 7789 /* system default */ 7790 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7791 ip4_def_policy.refcnt++; /*never reclaim this*/ 7792 7793 #ifdef INET6 7794 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7795 ip6_def_policy.refcnt++; /*never reclaim this*/ 7796 #endif 7797 7798 7799 #ifndef IPSEC_DEBUG2 7800 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7801 #endif /*IPSEC_DEBUG2*/ 7802 7803 /* initialize key statistics */ 7804 keystat.getspi_count = 1; 7805 7806 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7807 7808 return (0); 7809 } 7810 7811 void 7812 key_init(void) 7813 { 7814 static ONCE_DECL(key_init_once); 7815 7816 RUN_ONCE(&key_init_once, key_do_init); 7817 } 7818 7819 /* 7820 * XXX: maybe This function is called after INBOUND IPsec processing. 7821 * 7822 * Special check for tunnel-mode packets. 7823 * We must make some checks for consistency between inner and outer IP header. 7824 * 7825 * xxx more checks to be provided 7826 */ 7827 int 7828 key_checktunnelsanity( 7829 struct secasvar *sav, 7830 u_int family, 7831 void *src, 7832 void *dst 7833 ) 7834 { 7835 /* sanity check */ 7836 if (sav->sah == NULL) 7837 panic("sav->sah == NULL at key_checktunnelsanity"); 7838 7839 /* XXX: check inner IP header */ 7840 7841 return 1; 7842 } 7843 7844 #if 0 7845 #define hostnamelen strlen(hostname) 7846 7847 /* 7848 * Get FQDN for the host. 7849 * If the administrator configured hostname (by hostname(1)) without 7850 * domain name, returns nothing. 7851 */ 7852 static const char * 7853 key_getfqdn(void) 7854 { 7855 int i; 7856 int hasdot; 7857 static char fqdn[MAXHOSTNAMELEN + 1]; 7858 7859 if (!hostnamelen) 7860 return NULL; 7861 7862 /* check if it comes with domain name. */ 7863 hasdot = 0; 7864 for (i = 0; i < hostnamelen; i++) { 7865 if (hostname[i] == '.') 7866 hasdot++; 7867 } 7868 if (!hasdot) 7869 return NULL; 7870 7871 /* NOTE: hostname may not be NUL-terminated. */ 7872 memset(fqdn, 0, sizeof(fqdn)); 7873 memcpy(fqdn, hostname, hostnamelen); 7874 fqdn[hostnamelen] = '\0'; 7875 return fqdn; 7876 } 7877 7878 /* 7879 * get username@FQDN for the host/user. 7880 */ 7881 static const char * 7882 key_getuserfqdn(void) 7883 { 7884 const char *host; 7885 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7886 struct proc *p = curproc; 7887 char *q; 7888 7889 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7890 return NULL; 7891 if (!(host = key_getfqdn())) 7892 return NULL; 7893 7894 /* NOTE: s_login may not be-NUL terminated. */ 7895 memset(userfqdn, 0, sizeof(userfqdn)); 7896 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7897 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7898 q = userfqdn + strlen(userfqdn); 7899 *q++ = '@'; 7900 memcpy(q, host, strlen(host)); 7901 q += strlen(host); 7902 *q++ = '\0'; 7903 7904 return userfqdn; 7905 } 7906 #endif 7907 7908 /* record data transfer on SA, and update timestamps */ 7909 void 7910 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7911 { 7912 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7913 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7914 if (!sav->lft_c) 7915 return; 7916 7917 /* 7918 * XXX Currently, there is a difference of bytes size 7919 * between inbound and outbound processing. 7920 */ 7921 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7922 /* to check bytes lifetime is done in key_timehandler(). */ 7923 7924 /* 7925 * We use the number of packets as the unit of 7926 * sadb_lifetime_allocations. We increment the variable 7927 * whenever {esp,ah}_{in,out}put is called. 7928 */ 7929 sav->lft_c->sadb_lifetime_allocations++; 7930 /* XXX check for expires? */ 7931 7932 /* 7933 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7934 * in seconds. HARD and SOFT lifetime are measured by the time 7935 * difference (again in seconds) from sadb_lifetime_usetime. 7936 * 7937 * usetime 7938 * v expire expire 7939 * -----+-----+--------+---> t 7940 * <--------------> HARD 7941 * <-----> SOFT 7942 */ 7943 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7944 /* XXX check for expires? */ 7945 7946 return; 7947 } 7948 7949 /* dumb version */ 7950 void 7951 key_sa_routechange(struct sockaddr *dst) 7952 { 7953 struct secashead *sah; 7954 struct route *ro; 7955 const struct sockaddr *sa; 7956 7957 LIST_FOREACH(sah, &sahtree, chain) { 7958 ro = &sah->sa_route; 7959 sa = rtcache_getdst(ro); 7960 if (sa != NULL && dst->sa_len == sa->sa_len && 7961 memcmp(dst, sa, dst->sa_len) == 0) 7962 rtcache_free(ro); 7963 } 7964 7965 return; 7966 } 7967 7968 static void 7969 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7970 { 7971 if (sav == NULL) 7972 panic("key_sa_chgstate called with sav == NULL"); 7973 7974 if (sav->state == state) 7975 return; 7976 7977 if (__LIST_CHAINED(sav)) 7978 LIST_REMOVE(sav, chain); 7979 7980 sav->state = state; 7981 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7982 } 7983 7984 /* XXX too much? */ 7985 static struct mbuf * 7986 key_alloc_mbuf(int l) 7987 { 7988 struct mbuf *m = NULL, *n; 7989 int len, t; 7990 7991 len = l; 7992 while (len > 0) { 7993 MGET(n, M_DONTWAIT, MT_DATA); 7994 if (n && len > MLEN) 7995 MCLGET(n, M_DONTWAIT); 7996 if (!n) { 7997 m_freem(m); 7998 return NULL; 7999 } 8000 8001 n->m_next = NULL; 8002 n->m_len = 0; 8003 n->m_len = M_TRAILINGSPACE(n); 8004 /* use the bottom of mbuf, hoping we can prepend afterwards */ 8005 if (n->m_len > len) { 8006 t = (n->m_len - len) & ~(sizeof(long) - 1); 8007 n->m_data += t; 8008 n->m_len = len; 8009 } 8010 8011 len -= n->m_len; 8012 8013 if (m) 8014 m_cat(m, n); 8015 else 8016 m = n; 8017 } 8018 8019 return m; 8020 } 8021 8022 static struct mbuf * 8023 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 8024 { 8025 struct secashead *sah; 8026 struct secasvar *sav; 8027 u_int16_t proto; 8028 u_int stateidx; 8029 u_int8_t satype; 8030 u_int8_t state; 8031 int cnt; 8032 struct mbuf *m, *n; 8033 8034 /* map satype to proto */ 8035 if ((proto = key_satype2proto(req_satype)) == 0) { 8036 *errorp = EINVAL; 8037 return (NULL); 8038 } 8039 8040 /* count sav entries to be sent to the userland. */ 8041 cnt = 0; 8042 LIST_FOREACH(sah, &sahtree, chain) { 8043 if (req_satype != SADB_SATYPE_UNSPEC && 8044 proto != sah->saidx.proto) 8045 continue; 8046 8047 for (stateidx = 0; 8048 stateidx < _ARRAYLEN(saorder_state_any); 8049 stateidx++) { 8050 state = saorder_state_any[stateidx]; 8051 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8052 cnt++; 8053 } 8054 } 8055 } 8056 8057 if (cnt == 0) { 8058 *errorp = ENOENT; 8059 return (NULL); 8060 } 8061 8062 /* send this to the userland, one at a time. */ 8063 m = NULL; 8064 LIST_FOREACH(sah, &sahtree, chain) { 8065 if (req_satype != SADB_SATYPE_UNSPEC && 8066 proto != sah->saidx.proto) 8067 continue; 8068 8069 /* map proto to satype */ 8070 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 8071 m_freem(m); 8072 *errorp = EINVAL; 8073 return (NULL); 8074 } 8075 8076 for (stateidx = 0; 8077 stateidx < _ARRAYLEN(saorder_state_any); 8078 stateidx++) { 8079 state = saorder_state_any[stateidx]; 8080 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8081 n = key_setdumpsa(sav, SADB_DUMP, satype, 8082 --cnt, pid); 8083 if (!n) { 8084 m_freem(m); 8085 *errorp = ENOBUFS; 8086 return (NULL); 8087 } 8088 8089 if (!m) 8090 m = n; 8091 else 8092 m_cat(m, n); 8093 } 8094 } 8095 } 8096 8097 if (!m) { 8098 *errorp = EINVAL; 8099 return (NULL); 8100 } 8101 8102 if ((m->m_flags & M_PKTHDR) != 0) { 8103 m->m_pkthdr.len = 0; 8104 for (n = m; n; n = n->m_next) 8105 m->m_pkthdr.len += n->m_len; 8106 } 8107 8108 *errorp = 0; 8109 return (m); 8110 } 8111 8112 static struct mbuf * 8113 key_setspddump(int *errorp, pid_t pid) 8114 { 8115 struct secpolicy *sp; 8116 int cnt; 8117 u_int dir; 8118 struct mbuf *m, *n; 8119 8120 /* search SPD entry and get buffer size. */ 8121 cnt = 0; 8122 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8123 LIST_FOREACH(sp, &sptree[dir], chain) { 8124 cnt++; 8125 } 8126 } 8127 8128 if (cnt == 0) { 8129 *errorp = ENOENT; 8130 return (NULL); 8131 } 8132 8133 m = NULL; 8134 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8135 LIST_FOREACH(sp, &sptree[dir], chain) { 8136 --cnt; 8137 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8138 8139 if (!n) { 8140 *errorp = ENOBUFS; 8141 m_freem(m); 8142 return (NULL); 8143 } 8144 if (!m) 8145 m = n; 8146 else { 8147 m->m_pkthdr.len += n->m_pkthdr.len; 8148 m_cat(m, n); 8149 } 8150 } 8151 } 8152 8153 *errorp = 0; 8154 return (m); 8155 } 8156 8157 int 8158 key_get_used(void) { 8159 return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || 8160 !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); 8161 } 8162 8163 void 8164 key_update_used(void) 8165 { 8166 switch (ipsec_enabled) { 8167 default: 8168 case 0: 8169 #ifdef notyet 8170 /* XXX: racy */ 8171 ipsec_used = 0; 8172 #endif 8173 break; 8174 case 1: 8175 #ifndef notyet 8176 /* XXX: racy */ 8177 if (!ipsec_used) 8178 #endif 8179 ipsec_used = key_get_used(); 8180 break; 8181 case 2: 8182 ipsec_used = 1; 8183 break; 8184 } 8185 } 8186 8187 static int 8188 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8189 { 8190 struct mbuf *m, *n; 8191 int err2 = 0; 8192 char *p, *ep; 8193 size_t len; 8194 int s, error; 8195 8196 if (newp) 8197 return (EPERM); 8198 if (namelen != 1) 8199 return (EINVAL); 8200 8201 s = splsoftnet(); 8202 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8203 splx(s); 8204 if (!m) 8205 return (error); 8206 if (!oldp) 8207 *oldlenp = m->m_pkthdr.len; 8208 else { 8209 p = oldp; 8210 if (*oldlenp < m->m_pkthdr.len) { 8211 err2 = ENOMEM; 8212 ep = p + *oldlenp; 8213 } else { 8214 *oldlenp = m->m_pkthdr.len; 8215 ep = p + m->m_pkthdr.len; 8216 } 8217 for (n = m; n; n = n->m_next) { 8218 len = (ep - p < n->m_len) ? 8219 ep - p : n->m_len; 8220 error = copyout(mtod(n, const void *), p, len); 8221 p += len; 8222 if (error) 8223 break; 8224 } 8225 if (error == 0) 8226 error = err2; 8227 } 8228 m_freem(m); 8229 8230 return (error); 8231 } 8232 8233 static int 8234 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8235 { 8236 struct mbuf *m, *n; 8237 int err2 = 0; 8238 char *p, *ep; 8239 size_t len; 8240 int s, error; 8241 8242 if (newp) 8243 return (EPERM); 8244 if (namelen != 0) 8245 return (EINVAL); 8246 8247 s = splsoftnet(); 8248 m = key_setspddump(&error, l->l_proc->p_pid); 8249 splx(s); 8250 if (!m) 8251 return (error); 8252 if (!oldp) 8253 *oldlenp = m->m_pkthdr.len; 8254 else { 8255 p = oldp; 8256 if (*oldlenp < m->m_pkthdr.len) { 8257 err2 = ENOMEM; 8258 ep = p + *oldlenp; 8259 } else { 8260 *oldlenp = m->m_pkthdr.len; 8261 ep = p + m->m_pkthdr.len; 8262 } 8263 for (n = m; n; n = n->m_next) { 8264 len = (ep - p < n->m_len) ? 8265 ep - p : n->m_len; 8266 error = copyout(mtod(n, const void *), p, len); 8267 p += len; 8268 if (error) 8269 break; 8270 } 8271 if (error == 0) 8272 error = err2; 8273 } 8274 m_freem(m); 8275 8276 return (error); 8277 } 8278 8279 /* 8280 * Create sysctl tree for native IPSEC key knobs, originally 8281 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8282 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8283 * and in any case the part of our sysctl namespace used for dumping the 8284 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8285 * namespace, for API reasons. 8286 * 8287 * Pending a consensus on the right way to fix this, add a level of 8288 * indirection in how we number the `native' IPSEC key nodes; 8289 * and (as requested by Andrew Brown) move registration of the 8290 * KAME-compatible names to a separate function. 8291 */ 8292 #if 0 8293 # define IPSEC_PFKEY PF_KEY_V2 8294 # define IPSEC_PFKEY_NAME "keyv2" 8295 #else 8296 # define IPSEC_PFKEY PF_KEY 8297 # define IPSEC_PFKEY_NAME "key" 8298 #endif 8299 8300 static int 8301 sysctl_net_key_stats(SYSCTLFN_ARGS) 8302 { 8303 8304 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8305 } 8306 8307 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 8308 { 8309 8310 sysctl_createv(clog, 0, NULL, NULL, 8311 CTLFLAG_PERMANENT, 8312 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8313 NULL, 0, NULL, 0, 8314 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8315 8316 sysctl_createv(clog, 0, NULL, NULL, 8317 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8318 CTLTYPE_INT, "debug", NULL, 8319 NULL, 0, &key_debug_level, 0, 8320 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8321 sysctl_createv(clog, 0, NULL, NULL, 8322 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8323 CTLTYPE_INT, "spi_try", NULL, 8324 NULL, 0, &key_spi_trycnt, 0, 8325 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8326 sysctl_createv(clog, 0, NULL, NULL, 8327 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8328 CTLTYPE_INT, "spi_min_value", NULL, 8329 NULL, 0, &key_spi_minval, 0, 8330 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8331 sysctl_createv(clog, 0, NULL, NULL, 8332 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8333 CTLTYPE_INT, "spi_max_value", NULL, 8334 NULL, 0, &key_spi_maxval, 0, 8335 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8336 sysctl_createv(clog, 0, NULL, NULL, 8337 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8338 CTLTYPE_INT, "random_int", NULL, 8339 NULL, 0, &key_int_random, 0, 8340 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8341 sysctl_createv(clog, 0, NULL, NULL, 8342 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8343 CTLTYPE_INT, "larval_lifetime", NULL, 8344 NULL, 0, &key_larval_lifetime, 0, 8345 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8346 sysctl_createv(clog, 0, NULL, NULL, 8347 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8348 CTLTYPE_INT, "blockacq_count", NULL, 8349 NULL, 0, &key_blockacq_count, 0, 8350 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8351 sysctl_createv(clog, 0, NULL, NULL, 8352 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8353 CTLTYPE_INT, "blockacq_lifetime", NULL, 8354 NULL, 0, &key_blockacq_lifetime, 0, 8355 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8356 sysctl_createv(clog, 0, NULL, NULL, 8357 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8358 CTLTYPE_INT, "esp_keymin", NULL, 8359 NULL, 0, &ipsec_esp_keymin, 0, 8360 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8361 sysctl_createv(clog, 0, NULL, NULL, 8362 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8363 CTLTYPE_INT, "prefered_oldsa", NULL, 8364 NULL, 0, &key_prefered_oldsa, 0, 8365 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8366 sysctl_createv(clog, 0, NULL, NULL, 8367 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8368 CTLTYPE_INT, "esp_auth", NULL, 8369 NULL, 0, &ipsec_esp_auth, 0, 8370 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8371 sysctl_createv(clog, 0, NULL, NULL, 8372 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8373 CTLTYPE_INT, "ah_keymin", NULL, 8374 NULL, 0, &ipsec_ah_keymin, 0, 8375 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8376 sysctl_createv(clog, 0, NULL, NULL, 8377 CTLFLAG_PERMANENT, 8378 CTLTYPE_STRUCT, "stats", 8379 SYSCTL_DESCR("PF_KEY statistics"), 8380 sysctl_net_key_stats, 0, NULL, 0, 8381 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8382 } 8383 8384 /* 8385 * Register sysctl names used by setkey(8). For historical reasons, 8386 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8387 * for both IPSEC and KAME IPSEC. 8388 */ 8389 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for IPSEC") 8390 { 8391 8392 sysctl_createv(clog, 0, NULL, NULL, 8393 CTLFLAG_PERMANENT, 8394 CTLTYPE_NODE, "key", NULL, 8395 NULL, 0, NULL, 0, 8396 CTL_NET, PF_KEY, CTL_EOL); 8397 8398 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8399 sysctl_createv(clog, 0, NULL, NULL, 8400 CTLFLAG_PERMANENT, 8401 CTLTYPE_STRUCT, "dumpsa", NULL, 8402 sysctl_net_key_dumpsa, 0, NULL, 0, 8403 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8404 sysctl_createv(clog, 0, NULL, NULL, 8405 CTLFLAG_PERMANENT, 8406 CTLTYPE_STRUCT, "dumpsp", NULL, 8407 sysctl_net_key_dumpsp, 0, NULL, 0, 8408 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8409 } 8410
Indexes created Mon Sep 22 05:09:51 GMT 2025