key.c revision 1.100
1 /* $NetBSD: key.c,v 1.100 2016/07/07 06:59:30 ozaki-r Exp $ */ 2 /* $FreeBSD: src/sys/netipsec/key.c,v 1.3.2.3 2004/02/14 22:23:23 bms Exp $ */ 3 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: key.c,v 1.100 2016/07/07 06:59:30 ozaki-r 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 IN_ADDRLIST_READER_FOREACH(ia) { 4131 if (sin->sin_family == ia->ia_addr.sin_family && 4132 sin->sin_len == ia->ia_addr.sin_len && 4133 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4134 { 4135 return 1; 4136 } 4137 } 4138 break; 4139 #endif 4140 #ifdef INET6 4141 case AF_INET6: 4142 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4143 #endif 4144 } 4145 4146 return 0; 4147 } 4148 4149 #ifdef INET6 4150 /* 4151 * compare my own address for IPv6. 4152 * 1: ours 4153 * 0: other 4154 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4155 */ 4156 #include <netinet6/in6_var.h> 4157 4158 static int 4159 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4160 { 4161 struct in6_ifaddr *ia; 4162 const struct in6_multi *in6m; 4163 4164 IN6_ADDRLIST_READER_FOREACH(ia) { 4165 if (key_sockaddrcmp((const struct sockaddr *)&sin6, 4166 (const struct sockaddr *)&ia->ia_addr, 0) == 0) 4167 return 1; 4168 4169 /* 4170 * XXX Multicast 4171 * XXX why do we care about multlicast here while we don't care 4172 * about IPv4 multicast?? 4173 * XXX scope 4174 */ 4175 in6m = NULL; 4176 #ifdef __FreeBSD__ 4177 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 4178 #else 4179 for ((in6m) = ia->ia6_multiaddrs.lh_first; 4180 (in6m) != NULL && 4181 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); 4182 (in6m) = in6m->in6m_entry.le_next) 4183 continue; 4184 #endif 4185 if (in6m) 4186 return 1; 4187 } 4188 4189 /* loopback, just for safety */ 4190 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4191 return 1; 4192 4193 return 0; 4194 } 4195 #endif /*INET6*/ 4196 4197 /* 4198 * compare two secasindex structure. 4199 * flag can specify to compare 2 saidxes. 4200 * compare two secasindex structure without both mode and reqid. 4201 * don't compare port. 4202 * IN: 4203 * saidx0: source, it can be in SAD. 4204 * saidx1: object. 4205 * OUT: 4206 * 1 : equal 4207 * 0 : not equal 4208 */ 4209 static int 4210 key_cmpsaidx( 4211 const struct secasindex *saidx0, 4212 const struct secasindex *saidx1, 4213 int flag) 4214 { 4215 int chkport; 4216 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4217 4218 /* sanity */ 4219 if (saidx0 == NULL && saidx1 == NULL) 4220 return 1; 4221 4222 if (saidx0 == NULL || saidx1 == NULL) 4223 return 0; 4224 4225 if (saidx0->proto != saidx1->proto) 4226 return 0; 4227 4228 if (flag == CMP_EXACTLY) { 4229 if (saidx0->mode != saidx1->mode) 4230 return 0; 4231 if (saidx0->reqid != saidx1->reqid) 4232 return 0; 4233 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4234 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4235 return 0; 4236 } else { 4237 4238 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4239 if (flag == CMP_MODE_REQID 4240 ||flag == CMP_REQID) { 4241 /* 4242 * If reqid of SPD is non-zero, unique SA is required. 4243 * The result must be of same reqid in this case. 4244 */ 4245 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4246 return 0; 4247 } 4248 4249 if (flag == CMP_MODE_REQID) { 4250 if (saidx0->mode != IPSEC_MODE_ANY 4251 && saidx0->mode != saidx1->mode) 4252 return 0; 4253 } 4254 4255 4256 sa0src = &saidx0->src.sa; 4257 sa0dst = &saidx0->dst.sa; 4258 sa1src = &saidx1->src.sa; 4259 sa1dst = &saidx1->dst.sa; 4260 /* 4261 * If NAT-T is enabled, check ports for tunnel mode. 4262 * Don't do it for transport mode, as there is no 4263 * port information available in the SP. 4264 * Also don't check ports if they are set to zero 4265 * in the SPD: This means we have a non-generated 4266 * SPD which can't know UDP ports. 4267 */ 4268 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4269 chkport = PORT_LOOSE; 4270 else 4271 chkport = PORT_NONE; 4272 4273 if (key_sockaddrcmp(sa0src, sa1src, chkport) != 0) { 4274 return 0; 4275 } 4276 if (key_sockaddrcmp(sa0dst, sa1dst, chkport) != 0) { 4277 return 0; 4278 } 4279 } 4280 4281 return 1; 4282 } 4283 4284 /* 4285 * compare two secindex structure exactly. 4286 * IN: 4287 * spidx0: source, it is often in SPD. 4288 * spidx1: object, it is often from PFKEY message. 4289 * OUT: 4290 * 1 : equal 4291 * 0 : not equal 4292 */ 4293 int 4294 key_cmpspidx_exactly( 4295 const struct secpolicyindex *spidx0, 4296 const struct secpolicyindex *spidx1) 4297 { 4298 /* sanity */ 4299 if (spidx0 == NULL && spidx1 == NULL) 4300 return 1; 4301 4302 if (spidx0 == NULL || spidx1 == NULL) 4303 return 0; 4304 4305 if (spidx0->prefs != spidx1->prefs 4306 || spidx0->prefd != spidx1->prefd 4307 || spidx0->ul_proto != spidx1->ul_proto) 4308 return 0; 4309 4310 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) == 0 && 4311 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT) == 0; 4312 } 4313 4314 /* 4315 * compare two secindex structure with mask. 4316 * IN: 4317 * spidx0: source, it is often in SPD. 4318 * spidx1: object, it is often from IP header. 4319 * OUT: 4320 * 1 : equal 4321 * 0 : not equal 4322 */ 4323 int 4324 key_cmpspidx_withmask( 4325 const struct secpolicyindex *spidx0, 4326 const struct secpolicyindex *spidx1) 4327 { 4328 /* sanity */ 4329 if (spidx0 == NULL && spidx1 == NULL) 4330 return 1; 4331 4332 if (spidx0 == NULL || spidx1 == NULL) 4333 return 0; 4334 4335 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4336 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4337 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4338 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4339 return 0; 4340 4341 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4342 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4343 && spidx0->ul_proto != spidx1->ul_proto) 4344 return 0; 4345 4346 switch (spidx0->src.sa.sa_family) { 4347 case AF_INET: 4348 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4349 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4350 return 0; 4351 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4352 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4353 return 0; 4354 break; 4355 case AF_INET6: 4356 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4357 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4358 return 0; 4359 /* 4360 * scope_id check. if sin6_scope_id is 0, we regard it 4361 * as a wildcard scope, which matches any scope zone ID. 4362 */ 4363 if (spidx0->src.sin6.sin6_scope_id && 4364 spidx1->src.sin6.sin6_scope_id && 4365 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4366 return 0; 4367 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4368 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4369 return 0; 4370 break; 4371 default: 4372 /* XXX */ 4373 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4374 return 0; 4375 break; 4376 } 4377 4378 switch (spidx0->dst.sa.sa_family) { 4379 case AF_INET: 4380 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4381 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4382 return 0; 4383 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4384 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4385 return 0; 4386 break; 4387 case AF_INET6: 4388 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4389 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4390 return 0; 4391 /* 4392 * scope_id check. if sin6_scope_id is 0, we regard it 4393 * as a wildcard scope, which matches any scope zone ID. 4394 */ 4395 if (spidx0->src.sin6.sin6_scope_id && 4396 spidx1->src.sin6.sin6_scope_id && 4397 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4398 return 0; 4399 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4400 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4401 return 0; 4402 break; 4403 default: 4404 /* XXX */ 4405 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4406 return 0; 4407 break; 4408 } 4409 4410 /* XXX Do we check other field ? e.g. flowinfo */ 4411 4412 return 1; 4413 } 4414 4415 /* returns 0 on match */ 4416 static int 4417 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4418 { 4419 switch (howport) { 4420 case PORT_NONE: 4421 return 0; 4422 case PORT_LOOSE: 4423 if (port1 == 0 || port2 == 0) 4424 return 0; 4425 /*FALLTHROUGH*/ 4426 case PORT_STRICT: 4427 if (port1 != port2) { 4428 KEYDEBUG(KEYDEBUG_MATCH, 4429 printf("port fail %d != %d\n", port1, port2)); 4430 return 1; 4431 } 4432 return 0; 4433 default: 4434 KASSERT(0); 4435 return 1; 4436 } 4437 } 4438 4439 /* returns 0 on match */ 4440 static int 4441 key_sockaddrcmp( 4442 const struct sockaddr *sa1, 4443 const struct sockaddr *sa2, 4444 int howport) 4445 { 4446 const struct sockaddr_in *sin1, *sin2; 4447 const struct sockaddr_in6 *sin61, *sin62; 4448 4449 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4450 KEYDEBUG(KEYDEBUG_MATCH, 4451 printf("fam/len fail %d != %d || %d != %d\n", 4452 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4453 sa2->sa_len)); 4454 return 1; 4455 } 4456 4457 switch (sa1->sa_family) { 4458 case AF_INET: 4459 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4460 KEYDEBUG(KEYDEBUG_MATCH, 4461 printf("len fail %d != %zu\n", 4462 sa1->sa_len, sizeof(struct sockaddr_in))); 4463 return 1; 4464 } 4465 sin1 = (const struct sockaddr_in *)sa1; 4466 sin2 = (const struct sockaddr_in *)sa2; 4467 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4468 KEYDEBUG(KEYDEBUG_MATCH, 4469 printf("addr fail %#x != %#x\n", 4470 sin1->sin_addr.s_addr, 4471 sin2->sin_addr.s_addr)); 4472 return 1; 4473 } 4474 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4475 return 1; 4476 } 4477 KEYDEBUG(KEYDEBUG_MATCH, 4478 printf("addr success %#x[%d] == %#x[%d]\n", 4479 sin1->sin_addr.s_addr, 4480 sin1->sin_port, 4481 sin2->sin_addr.s_addr, 4482 sin2->sin_port)); 4483 break; 4484 case AF_INET6: 4485 sin61 = (const struct sockaddr_in6 *)sa1; 4486 sin62 = (const struct sockaddr_in6 *)sa2; 4487 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4488 return 1; /*EINVAL*/ 4489 4490 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4491 return 1; 4492 } 4493 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4494 return 1; 4495 } 4496 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4497 return 1; 4498 } 4499 break; 4500 default: 4501 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4502 return 1; 4503 break; 4504 } 4505 4506 return 0; 4507 } 4508 4509 /* 4510 * compare two buffers with mask. 4511 * IN: 4512 * addr1: source 4513 * addr2: object 4514 * bits: Number of bits to compare 4515 * OUT: 4516 * 1 : equal 4517 * 0 : not equal 4518 */ 4519 static int 4520 key_bbcmp(const void *a1, const void *a2, u_int bits) 4521 { 4522 const unsigned char *p1 = a1; 4523 const unsigned char *p2 = a2; 4524 4525 /* XXX: This could be considerably faster if we compare a word 4526 * at a time, but it is complicated on LSB Endian machines */ 4527 4528 /* Handle null pointers */ 4529 if (p1 == NULL || p2 == NULL) 4530 return (p1 == p2); 4531 4532 while (bits >= 8) { 4533 if (*p1++ != *p2++) 4534 return 0; 4535 bits -= 8; 4536 } 4537 4538 if (bits > 0) { 4539 u_int8_t mask = ~((1<<(8-bits))-1); 4540 if ((*p1 & mask) != (*p2 & mask)) 4541 return 0; 4542 } 4543 return 1; /* Match! */ 4544 } 4545 4546 /* 4547 * time handler. 4548 * scanning SPD and SAD to check status for each entries, 4549 * and do to remove or to expire. 4550 */ 4551 void 4552 key_timehandler(void* arg) 4553 { 4554 u_int dir; 4555 int s; 4556 time_t now = time_uptime; 4557 4558 s = splsoftnet(); /*called from softclock()*/ 4559 mutex_enter(softnet_lock); 4560 4561 /* SPD */ 4562 { 4563 struct secpolicy *sp, *nextsp; 4564 4565 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4566 for (sp = LIST_FIRST(&sptree[dir]); 4567 sp != NULL; 4568 sp = nextsp) { 4569 4570 nextsp = LIST_NEXT(sp, chain); 4571 4572 if (sp->state == IPSEC_SPSTATE_DEAD) { 4573 key_sp_unlink(sp); /*XXX*/ 4574 4575 /* 'sp' dead; continue transfers to 4576 * 'sp = nextsp' 4577 */ 4578 continue; 4579 } 4580 4581 if (sp->lifetime == 0 && sp->validtime == 0) 4582 continue; 4583 4584 /* the deletion will occur next time */ 4585 if ((sp->lifetime && now - sp->created > sp->lifetime) 4586 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4587 key_sp_dead(sp); 4588 key_spdexpire(sp); 4589 continue; 4590 } 4591 } 4592 } 4593 } 4594 4595 /* SAD */ 4596 { 4597 struct secashead *sah, *nextsah; 4598 struct secasvar *sav, *nextsav; 4599 4600 for (sah = LIST_FIRST(&sahtree); 4601 sah != NULL; 4602 sah = nextsah) { 4603 4604 nextsah = LIST_NEXT(sah, chain); 4605 4606 /* if sah has been dead, then delete it and process next sah. */ 4607 if (sah->state == SADB_SASTATE_DEAD) { 4608 key_delsah(sah); 4609 continue; 4610 } 4611 4612 /* if LARVAL entry doesn't become MATURE, delete it. */ 4613 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4614 sav != NULL; 4615 sav = nextsav) { 4616 4617 nextsav = LIST_NEXT(sav, chain); 4618 4619 if (now - sav->created > key_larval_lifetime) { 4620 KEY_FREESAV(&sav); 4621 } 4622 } 4623 4624 /* 4625 * check MATURE entry to start to send expire message 4626 * whether or not. 4627 */ 4628 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4629 sav != NULL; 4630 sav = nextsav) { 4631 4632 nextsav = LIST_NEXT(sav, chain); 4633 4634 /* we don't need to check. */ 4635 if (sav->lft_s == NULL) 4636 continue; 4637 4638 /* sanity check */ 4639 if (sav->lft_c == NULL) { 4640 ipseclog((LOG_DEBUG,"key_timehandler: " 4641 "There is no CURRENT time, why?\n")); 4642 continue; 4643 } 4644 4645 /* check SOFT lifetime */ 4646 if (sav->lft_s->sadb_lifetime_addtime != 0 4647 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4648 /* 4649 * check SA to be used whether or not. 4650 * when SA hasn't been used, delete it. 4651 */ 4652 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4653 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4654 KEY_FREESAV(&sav); 4655 } else { 4656 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4657 /* 4658 * XXX If we keep to send expire 4659 * message in the status of 4660 * DYING. Do remove below code. 4661 */ 4662 key_expire(sav); 4663 } 4664 } 4665 /* check SOFT lifetime by bytes */ 4666 /* 4667 * XXX I don't know the way to delete this SA 4668 * when new SA is installed. Caution when it's 4669 * installed too big lifetime by time. 4670 */ 4671 else if (sav->lft_s->sadb_lifetime_bytes != 0 4672 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4673 4674 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4675 /* 4676 * XXX If we keep to send expire 4677 * message in the status of 4678 * DYING. Do remove below code. 4679 */ 4680 key_expire(sav); 4681 } 4682 } 4683 4684 /* check DYING entry to change status to DEAD. */ 4685 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4686 sav != NULL; 4687 sav = nextsav) { 4688 4689 nextsav = LIST_NEXT(sav, chain); 4690 4691 /* we don't need to check. */ 4692 if (sav->lft_h == NULL) 4693 continue; 4694 4695 /* sanity check */ 4696 if (sav->lft_c == NULL) { 4697 ipseclog((LOG_DEBUG, "key_timehandler: " 4698 "There is no CURRENT time, why?\n")); 4699 continue; 4700 } 4701 4702 if (sav->lft_h->sadb_lifetime_addtime != 0 4703 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4704 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4705 KEY_FREESAV(&sav); 4706 } 4707 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4708 else if (sav->lft_s != NULL 4709 && sav->lft_s->sadb_lifetime_addtime != 0 4710 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4711 /* 4712 * XXX: should be checked to be 4713 * installed the valid SA. 4714 */ 4715 4716 /* 4717 * If there is no SA then sending 4718 * expire message. 4719 */ 4720 key_expire(sav); 4721 } 4722 #endif 4723 /* check HARD lifetime by bytes */ 4724 else if (sav->lft_h->sadb_lifetime_bytes != 0 4725 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4726 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4727 KEY_FREESAV(&sav); 4728 } 4729 } 4730 4731 /* delete entry in DEAD */ 4732 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4733 sav != NULL; 4734 sav = nextsav) { 4735 4736 nextsav = LIST_NEXT(sav, chain); 4737 4738 /* sanity check */ 4739 if (sav->state != SADB_SASTATE_DEAD) { 4740 ipseclog((LOG_DEBUG, "key_timehandler: " 4741 "invalid sav->state " 4742 "(queue: %d SA: %d): " 4743 "kill it anyway\n", 4744 SADB_SASTATE_DEAD, sav->state)); 4745 } 4746 4747 /* 4748 * do not call key_freesav() here. 4749 * sav should already be freed, and sav->refcnt 4750 * shows other references to sav 4751 * (such as from SPD). 4752 */ 4753 } 4754 } 4755 } 4756 4757 #ifndef IPSEC_NONBLOCK_ACQUIRE 4758 /* ACQ tree */ 4759 { 4760 struct secacq *acq, *nextacq; 4761 4762 for (acq = LIST_FIRST(&acqtree); 4763 acq != NULL; 4764 acq = nextacq) { 4765 4766 nextacq = LIST_NEXT(acq, chain); 4767 4768 if (now - acq->created > key_blockacq_lifetime 4769 && __LIST_CHAINED(acq)) { 4770 LIST_REMOVE(acq, chain); 4771 KFREE(acq); 4772 } 4773 } 4774 } 4775 #endif 4776 4777 /* SP ACQ tree */ 4778 { 4779 struct secspacq *acq, *nextacq; 4780 4781 for (acq = LIST_FIRST(&spacqtree); 4782 acq != NULL; 4783 acq = nextacq) { 4784 4785 nextacq = LIST_NEXT(acq, chain); 4786 4787 if (now - acq->created > key_blockacq_lifetime 4788 && __LIST_CHAINED(acq)) { 4789 LIST_REMOVE(acq, chain); 4790 KFREE(acq); 4791 } 4792 } 4793 } 4794 4795 #ifndef IPSEC_DEBUG2 4796 /* do exchange to tick time !! */ 4797 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4798 #endif /* IPSEC_DEBUG2 */ 4799 4800 mutex_exit(softnet_lock); 4801 splx(s); 4802 return; 4803 } 4804 4805 u_long 4806 key_random(void) 4807 { 4808 u_long value; 4809 4810 key_randomfill(&value, sizeof(value)); 4811 return value; 4812 } 4813 4814 void 4815 key_randomfill(void *p, size_t l) 4816 { 4817 4818 cprng_fast(p, l); 4819 } 4820 4821 /* 4822 * map SADB_SATYPE_* to IPPROTO_*. 4823 * if satype == SADB_SATYPE then satype is mapped to ~0. 4824 * OUT: 4825 * 0: invalid satype. 4826 */ 4827 static u_int16_t 4828 key_satype2proto(u_int8_t satype) 4829 { 4830 switch (satype) { 4831 case SADB_SATYPE_UNSPEC: 4832 return IPSEC_PROTO_ANY; 4833 case SADB_SATYPE_AH: 4834 return IPPROTO_AH; 4835 case SADB_SATYPE_ESP: 4836 return IPPROTO_ESP; 4837 case SADB_X_SATYPE_IPCOMP: 4838 return IPPROTO_IPCOMP; 4839 case SADB_X_SATYPE_TCPSIGNATURE: 4840 return IPPROTO_TCP; 4841 default: 4842 return 0; 4843 } 4844 /* NOTREACHED */ 4845 } 4846 4847 /* 4848 * map IPPROTO_* to SADB_SATYPE_* 4849 * OUT: 4850 * 0: invalid protocol type. 4851 */ 4852 static u_int8_t 4853 key_proto2satype(u_int16_t proto) 4854 { 4855 switch (proto) { 4856 case IPPROTO_AH: 4857 return SADB_SATYPE_AH; 4858 case IPPROTO_ESP: 4859 return SADB_SATYPE_ESP; 4860 case IPPROTO_IPCOMP: 4861 return SADB_X_SATYPE_IPCOMP; 4862 case IPPROTO_TCP: 4863 return SADB_X_SATYPE_TCPSIGNATURE; 4864 default: 4865 return 0; 4866 } 4867 /* NOTREACHED */ 4868 } 4869 4870 static int 4871 key_setsecasidx(int proto, int mode, int reqid, 4872 const struct sadb_address * src, 4873 const struct sadb_address * dst, 4874 struct secasindex * saidx) 4875 { 4876 const union sockaddr_union * src_u = 4877 (const union sockaddr_union *) src; 4878 const union sockaddr_union * dst_u = 4879 (const union sockaddr_union *) dst; 4880 4881 /* sa len safety check */ 4882 if (key_checksalen(src_u) != 0) 4883 return -1; 4884 if (key_checksalen(dst_u) != 0) 4885 return -1; 4886 4887 memset(saidx, 0, sizeof(*saidx)); 4888 saidx->proto = proto; 4889 saidx->mode = mode; 4890 saidx->reqid = reqid; 4891 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4892 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4893 4894 key_porttosaddr(&((saidx)->src),0); 4895 key_porttosaddr(&((saidx)->dst),0); 4896 return 0; 4897 } 4898 4899 /* %%% PF_KEY */ 4900 /* 4901 * SADB_GETSPI processing is to receive 4902 * <base, (SA2), src address, dst address, (SPI range)> 4903 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4904 * tree with the status of LARVAL, and send 4905 * <base, SA(*), address(SD)> 4906 * to the IKMPd. 4907 * 4908 * IN: mhp: pointer to the pointer to each header. 4909 * OUT: NULL if fail. 4910 * other if success, return pointer to the message to send. 4911 */ 4912 static int 4913 key_getspi(struct socket *so, struct mbuf *m, 4914 const struct sadb_msghdr *mhp) 4915 { 4916 struct sadb_address *src0, *dst0; 4917 struct secasindex saidx; 4918 struct secashead *newsah; 4919 struct secasvar *newsav; 4920 u_int8_t proto; 4921 u_int32_t spi; 4922 u_int8_t mode; 4923 u_int16_t reqid; 4924 int error; 4925 4926 /* sanity check */ 4927 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4928 panic("key_getspi: NULL pointer is passed"); 4929 4930 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4931 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4932 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4933 return key_senderror(so, m, EINVAL); 4934 } 4935 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4936 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4937 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4938 return key_senderror(so, m, EINVAL); 4939 } 4940 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4941 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4942 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4943 } else { 4944 mode = IPSEC_MODE_ANY; 4945 reqid = 0; 4946 } 4947 4948 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4949 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4950 4951 /* map satype to proto */ 4952 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4953 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4954 return key_senderror(so, m, EINVAL); 4955 } 4956 4957 4958 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 4959 dst0 + 1, &saidx)) != 0) 4960 return key_senderror(so, m, EINVAL); 4961 4962 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 4963 return key_senderror(so, m, EINVAL); 4964 4965 /* SPI allocation */ 4966 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4967 &saidx); 4968 if (spi == 0) 4969 return key_senderror(so, m, EINVAL); 4970 4971 /* get a SA index */ 4972 if ((newsah = key_getsah(&saidx)) == NULL) { 4973 /* create a new SA index */ 4974 if ((newsah = key_newsah(&saidx)) == NULL) { 4975 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4976 return key_senderror(so, m, ENOBUFS); 4977 } 4978 } 4979 4980 /* get a new SA */ 4981 /* XXX rewrite */ 4982 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4983 if (newsav == NULL) { 4984 /* XXX don't free new SA index allocated in above. */ 4985 return key_senderror(so, m, error); 4986 } 4987 4988 /* set spi */ 4989 newsav->spi = htonl(spi); 4990 4991 #ifndef IPSEC_NONBLOCK_ACQUIRE 4992 /* delete the entry in acqtree */ 4993 if (mhp->msg->sadb_msg_seq != 0) { 4994 struct secacq *acq; 4995 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4996 /* reset counter in order to deletion by timehandler. */ 4997 acq->created = time_uptime; 4998 acq->count = 0; 4999 } 5000 } 5001 #endif 5002 5003 { 5004 struct mbuf *n, *nn; 5005 struct sadb_sa *m_sa; 5006 struct sadb_msg *newmsg; 5007 int off, len; 5008 5009 /* create new sadb_msg to reply. */ 5010 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 5011 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5012 if (len > MCLBYTES) 5013 return key_senderror(so, m, ENOBUFS); 5014 5015 MGETHDR(n, M_DONTWAIT, MT_DATA); 5016 if (len > MHLEN) { 5017 MCLGET(n, M_DONTWAIT); 5018 if ((n->m_flags & M_EXT) == 0) { 5019 m_freem(n); 5020 n = NULL; 5021 } 5022 } 5023 if (!n) 5024 return key_senderror(so, m, ENOBUFS); 5025 5026 n->m_len = len; 5027 n->m_next = NULL; 5028 off = 0; 5029 5030 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 5031 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 5032 5033 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 5034 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 5035 m_sa->sadb_sa_exttype = SADB_EXT_SA; 5036 m_sa->sadb_sa_spi = htonl(spi); 5037 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5038 5039 #ifdef DIAGNOSTIC 5040 if (off != len) 5041 panic("length inconsistency in key_getspi"); 5042 #endif 5043 5044 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 5045 SADB_EXT_ADDRESS_DST); 5046 if (!n->m_next) { 5047 m_freem(n); 5048 return key_senderror(so, m, ENOBUFS); 5049 } 5050 5051 if (n->m_len < sizeof(struct sadb_msg)) { 5052 n = m_pullup(n, sizeof(struct sadb_msg)); 5053 if (n == NULL) 5054 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 5055 } 5056 5057 n->m_pkthdr.len = 0; 5058 for (nn = n; nn; nn = nn->m_next) 5059 n->m_pkthdr.len += nn->m_len; 5060 5061 newmsg = mtod(n, struct sadb_msg *); 5062 newmsg->sadb_msg_seq = newsav->seq; 5063 newmsg->sadb_msg_errno = 0; 5064 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5065 5066 m_freem(m); 5067 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5068 } 5069 } 5070 5071 /* 5072 * allocating new SPI 5073 * called by key_getspi(). 5074 * OUT: 5075 * 0: failure. 5076 * others: success. 5077 */ 5078 static u_int32_t 5079 key_do_getnewspi(const struct sadb_spirange *spirange, 5080 const struct secasindex *saidx) 5081 { 5082 u_int32_t newspi; 5083 u_int32_t spmin, spmax; 5084 int count = key_spi_trycnt; 5085 5086 /* set spi range to allocate */ 5087 if (spirange != NULL) { 5088 spmin = spirange->sadb_spirange_min; 5089 spmax = spirange->sadb_spirange_max; 5090 } else { 5091 spmin = key_spi_minval; 5092 spmax = key_spi_maxval; 5093 } 5094 /* IPCOMP needs 2-byte SPI */ 5095 if (saidx->proto == IPPROTO_IPCOMP) { 5096 u_int32_t t; 5097 if (spmin >= 0x10000) 5098 spmin = 0xffff; 5099 if (spmax >= 0x10000) 5100 spmax = 0xffff; 5101 if (spmin > spmax) { 5102 t = spmin; spmin = spmax; spmax = t; 5103 } 5104 } 5105 5106 if (spmin == spmax) { 5107 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5108 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 5109 return 0; 5110 } 5111 5112 count--; /* taking one cost. */ 5113 newspi = spmin; 5114 5115 } else { 5116 5117 /* init SPI */ 5118 newspi = 0; 5119 5120 /* when requesting to allocate spi ranged */ 5121 while (count--) { 5122 /* generate pseudo-random SPI value ranged. */ 5123 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5124 5125 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5126 break; 5127 } 5128 5129 if (count == 0 || newspi == 0) { 5130 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 5131 return 0; 5132 } 5133 } 5134 5135 /* statistics */ 5136 keystat.getspi_count = 5137 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5138 5139 return newspi; 5140 } 5141 5142 static int 5143 key_handle_natt_info(struct secasvar *sav, 5144 const struct sadb_msghdr *mhp) 5145 { 5146 const char *msg = "?" ; 5147 struct sadb_x_nat_t_type *type; 5148 struct sadb_x_nat_t_port *sport, *dport; 5149 struct sadb_address *iaddr, *raddr; 5150 struct sadb_x_nat_t_frag *frag; 5151 5152 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5153 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5154 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5155 return 0; 5156 5157 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5158 msg = "TYPE"; 5159 goto bad; 5160 } 5161 5162 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5163 msg = "SPORT"; 5164 goto bad; 5165 } 5166 5167 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5168 msg = "DPORT"; 5169 goto bad; 5170 } 5171 5172 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5173 ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n", __func__)); 5174 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5175 msg = "OAI"; 5176 goto bad; 5177 } 5178 } 5179 5180 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5181 ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n", __func__)); 5182 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5183 msg = "OAR"; 5184 goto bad; 5185 } 5186 } 5187 5188 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5189 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5190 msg = "FRAG"; 5191 goto bad; 5192 } 5193 } 5194 5195 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5196 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5197 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5198 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5199 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5200 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5201 5202 ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n", 5203 __func__, type->sadb_x_nat_t_type_type, 5204 ntohs(sport->sadb_x_nat_t_port_port), 5205 ntohs(dport->sadb_x_nat_t_port_port))); 5206 5207 sav->natt_type = type->sadb_x_nat_t_type_type; 5208 key_porttosaddr(&sav->sah->saidx.src, 5209 sport->sadb_x_nat_t_port_port); 5210 key_porttosaddr(&sav->sah->saidx.dst, 5211 dport->sadb_x_nat_t_port_port); 5212 if (frag) 5213 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5214 else 5215 sav->esp_frag = IP_MAXPACKET; 5216 5217 return 0; 5218 bad: 5219 ipseclog((LOG_DEBUG, "%s: invalid message %s\n", __func__, msg)); 5220 __USE(msg); 5221 return -1; 5222 } 5223 5224 /* Just update the IPSEC_NAT_T ports if present */ 5225 static int 5226 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5227 const struct sadb_msghdr *mhp) 5228 { 5229 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5230 ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n", __func__)); 5231 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5232 ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n", __func__)); 5233 5234 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5235 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5236 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5237 struct sadb_x_nat_t_type *type; 5238 struct sadb_x_nat_t_port *sport; 5239 struct sadb_x_nat_t_port *dport; 5240 5241 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5242 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5243 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5244 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5245 __func__)); 5246 return -1; 5247 } 5248 5249 type = (struct sadb_x_nat_t_type *) 5250 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5251 sport = (struct sadb_x_nat_t_port *) 5252 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5253 dport = (struct sadb_x_nat_t_port *) 5254 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5255 5256 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5257 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5258 5259 ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n", 5260 __func__, type->sadb_x_nat_t_type_type, 5261 ntohs(sport->sadb_x_nat_t_port_port), 5262 ntohs(dport->sadb_x_nat_t_port_port))); 5263 } 5264 5265 return 0; 5266 } 5267 5268 5269 /* 5270 * SADB_UPDATE processing 5271 * receive 5272 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5273 * key(AE), (identity(SD),) (sensitivity)> 5274 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5275 * and send 5276 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5277 * (identity(SD),) (sensitivity)> 5278 * to the ikmpd. 5279 * 5280 * m will always be freed. 5281 */ 5282 static int 5283 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5284 { 5285 struct sadb_sa *sa0; 5286 struct sadb_address *src0, *dst0; 5287 struct secasindex saidx; 5288 struct secashead *sah; 5289 struct secasvar *sav; 5290 u_int16_t proto; 5291 u_int8_t mode; 5292 u_int16_t reqid; 5293 int error; 5294 5295 /* sanity check */ 5296 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5297 panic("key_update: NULL pointer is passed"); 5298 5299 /* map satype to proto */ 5300 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5301 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 5302 return key_senderror(so, m, EINVAL); 5303 } 5304 5305 if (mhp->ext[SADB_EXT_SA] == NULL || 5306 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5307 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5308 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5309 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5310 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5311 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5312 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5313 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5314 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5315 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5316 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5317 return key_senderror(so, m, EINVAL); 5318 } 5319 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5320 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5321 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5322 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5323 return key_senderror(so, m, EINVAL); 5324 } 5325 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5326 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5327 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5328 } else { 5329 mode = IPSEC_MODE_ANY; 5330 reqid = 0; 5331 } 5332 /* XXX boundary checking for other extensions */ 5333 5334 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5335 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5336 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5337 5338 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5339 dst0 + 1, &saidx)) != 0) 5340 return key_senderror(so, m, EINVAL); 5341 5342 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5343 return key_senderror(so, m, EINVAL); 5344 5345 /* get a SA header */ 5346 if ((sah = key_getsah(&saidx)) == NULL) { 5347 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 5348 return key_senderror(so, m, ENOENT); 5349 } 5350 5351 /* set spidx if there */ 5352 /* XXX rewrite */ 5353 error = key_setident(sah, m, mhp); 5354 if (error) 5355 return key_senderror(so, m, error); 5356 5357 /* find a SA with sequence number. */ 5358 #ifdef IPSEC_DOSEQCHECK 5359 if (mhp->msg->sadb_msg_seq != 0 5360 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5361 ipseclog((LOG_DEBUG, 5362 "key_update: no larval SA with sequence %u exists.\n", 5363 mhp->msg->sadb_msg_seq)); 5364 return key_senderror(so, m, ENOENT); 5365 } 5366 #else 5367 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 5368 ipseclog((LOG_DEBUG, 5369 "key_update: no such a SA found (spi:%u)\n", 5370 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5371 return key_senderror(so, m, EINVAL); 5372 } 5373 #endif 5374 5375 /* validity check */ 5376 if (sav->sah->saidx.proto != proto) { 5377 ipseclog((LOG_DEBUG, 5378 "key_update: protocol mismatched (DB=%u param=%u)\n", 5379 sav->sah->saidx.proto, proto)); 5380 return key_senderror(so, m, EINVAL); 5381 } 5382 #ifdef IPSEC_DOSEQCHECK 5383 if (sav->spi != sa0->sadb_sa_spi) { 5384 ipseclog((LOG_DEBUG, 5385 "key_update: SPI mismatched (DB:%u param:%u)\n", 5386 (u_int32_t)ntohl(sav->spi), 5387 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5388 return key_senderror(so, m, EINVAL); 5389 } 5390 #endif 5391 if (sav->pid != mhp->msg->sadb_msg_pid) { 5392 ipseclog((LOG_DEBUG, 5393 "key_update: pid mismatched (DB:%u param:%u)\n", 5394 sav->pid, mhp->msg->sadb_msg_pid)); 5395 return key_senderror(so, m, EINVAL); 5396 } 5397 5398 /* copy sav values */ 5399 error = key_setsaval(sav, m, mhp); 5400 if (error) { 5401 KEY_FREESAV(&sav); 5402 return key_senderror(so, m, error); 5403 } 5404 5405 if ((error = key_handle_natt_info(sav,mhp)) != 0) 5406 return key_senderror(so, m, EINVAL); 5407 5408 /* check SA values to be mature. */ 5409 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5410 KEY_FREESAV(&sav); 5411 return key_senderror(so, m, 0); 5412 } 5413 5414 { 5415 struct mbuf *n; 5416 5417 /* set msg buf from mhp */ 5418 n = key_getmsgbuf_x1(m, mhp); 5419 if (n == NULL) { 5420 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5421 return key_senderror(so, m, ENOBUFS); 5422 } 5423 5424 m_freem(m); 5425 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5426 } 5427 } 5428 5429 /* 5430 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5431 * only called by key_update(). 5432 * OUT: 5433 * NULL : not found 5434 * others : found, pointer to a SA. 5435 */ 5436 #ifdef IPSEC_DOSEQCHECK 5437 static struct secasvar * 5438 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5439 { 5440 struct secasvar *sav; 5441 u_int state; 5442 5443 state = SADB_SASTATE_LARVAL; 5444 5445 /* search SAD with sequence number ? */ 5446 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5447 5448 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5449 5450 if (sav->seq == seq) { 5451 SA_ADDREF(sav); 5452 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5453 printf("DP %s cause refcnt++:%d SA:%p\n", 5454 __func__, sav->refcnt, sav)); 5455 return sav; 5456 } 5457 } 5458 5459 return NULL; 5460 } 5461 #endif 5462 5463 /* 5464 * SADB_ADD processing 5465 * add an entry to SA database, when received 5466 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5467 * key(AE), (identity(SD),) (sensitivity)> 5468 * from the ikmpd, 5469 * and send 5470 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5471 * (identity(SD),) (sensitivity)> 5472 * to the ikmpd. 5473 * 5474 * IGNORE identity and sensitivity messages. 5475 * 5476 * m will always be freed. 5477 */ 5478 static int 5479 key_add(struct socket *so, struct mbuf *m, 5480 const struct sadb_msghdr *mhp) 5481 { 5482 struct sadb_sa *sa0; 5483 struct sadb_address *src0, *dst0; 5484 struct secasindex saidx; 5485 struct secashead *newsah; 5486 struct secasvar *newsav; 5487 u_int16_t proto; 5488 u_int8_t mode; 5489 u_int16_t reqid; 5490 int error; 5491 5492 /* sanity check */ 5493 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5494 panic("key_add: NULL pointer is passed"); 5495 5496 /* map satype to proto */ 5497 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5498 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5499 return key_senderror(so, m, EINVAL); 5500 } 5501 5502 if (mhp->ext[SADB_EXT_SA] == NULL || 5503 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5504 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5505 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5506 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5507 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5508 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5509 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5510 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5511 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5512 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5513 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5514 return key_senderror(so, m, EINVAL); 5515 } 5516 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5517 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5518 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5519 /* XXX need more */ 5520 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5521 return key_senderror(so, m, EINVAL); 5522 } 5523 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5524 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5525 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5526 } else { 5527 mode = IPSEC_MODE_ANY; 5528 reqid = 0; 5529 } 5530 5531 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5532 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5533 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5534 5535 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5536 dst0 + 1, &saidx)) != 0) 5537 return key_senderror(so, m, EINVAL); 5538 5539 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5540 return key_senderror(so, m, EINVAL); 5541 5542 /* get a SA header */ 5543 if ((newsah = key_getsah(&saidx)) == NULL) { 5544 /* create a new SA header */ 5545 if ((newsah = key_newsah(&saidx)) == NULL) { 5546 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5547 return key_senderror(so, m, ENOBUFS); 5548 } 5549 } 5550 5551 /* set spidx if there */ 5552 /* XXX rewrite */ 5553 error = key_setident(newsah, m, mhp); 5554 if (error) { 5555 return key_senderror(so, m, error); 5556 } 5557 5558 /* create new SA entry. */ 5559 /* We can create new SA only if SPI is differenct. */ 5560 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5561 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5562 return key_senderror(so, m, EEXIST); 5563 } 5564 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5565 if (newsav == NULL) { 5566 return key_senderror(so, m, error); 5567 } 5568 5569 if ((error = key_handle_natt_info(newsav, mhp)) != 0) 5570 return key_senderror(so, m, EINVAL); 5571 5572 /* check SA values to be mature. */ 5573 if ((error = key_mature(newsav)) != 0) { 5574 KEY_FREESAV(&newsav); 5575 return key_senderror(so, m, error); 5576 } 5577 5578 /* 5579 * don't call key_freesav() here, as we would like to keep the SA 5580 * in the database on success. 5581 */ 5582 5583 { 5584 struct mbuf *n; 5585 5586 /* set msg buf from mhp */ 5587 n = key_getmsgbuf_x1(m, mhp); 5588 if (n == NULL) { 5589 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5590 return key_senderror(so, m, ENOBUFS); 5591 } 5592 5593 m_freem(m); 5594 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5595 } 5596 } 5597 5598 /* m is retained */ 5599 static int 5600 key_setident(struct secashead *sah, struct mbuf *m, 5601 const struct sadb_msghdr *mhp) 5602 { 5603 const struct sadb_ident *idsrc, *iddst; 5604 int idsrclen, iddstlen; 5605 5606 /* sanity check */ 5607 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5608 panic("key_setident: NULL pointer is passed"); 5609 5610 /* don't make buffer if not there */ 5611 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5612 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5613 sah->idents = NULL; 5614 sah->identd = NULL; 5615 return 0; 5616 } 5617 5618 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5619 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5620 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5621 return EINVAL; 5622 } 5623 5624 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5625 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5626 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5627 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5628 5629 /* validity check */ 5630 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5631 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5632 return EINVAL; 5633 } 5634 5635 switch (idsrc->sadb_ident_type) { 5636 case SADB_IDENTTYPE_PREFIX: 5637 case SADB_IDENTTYPE_FQDN: 5638 case SADB_IDENTTYPE_USERFQDN: 5639 default: 5640 /* XXX do nothing */ 5641 sah->idents = NULL; 5642 sah->identd = NULL; 5643 return 0; 5644 } 5645 5646 /* make structure */ 5647 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5648 if (sah->idents == NULL) { 5649 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5650 return ENOBUFS; 5651 } 5652 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5653 if (sah->identd == NULL) { 5654 KFREE(sah->idents); 5655 sah->idents = NULL; 5656 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5657 return ENOBUFS; 5658 } 5659 memcpy(sah->idents, idsrc, idsrclen); 5660 memcpy(sah->identd, iddst, iddstlen); 5661 5662 return 0; 5663 } 5664 5665 /* 5666 * m will not be freed on return. 5667 * it is caller's responsibility to free the result. 5668 */ 5669 static struct mbuf * 5670 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5671 { 5672 struct mbuf *n; 5673 5674 /* sanity check */ 5675 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5676 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5677 5678 /* create new sadb_msg to reply. */ 5679 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5680 SADB_EXT_SA, SADB_X_EXT_SA2, 5681 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5682 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5683 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5684 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5685 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5686 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5687 if (!n) 5688 return NULL; 5689 5690 if (n->m_len < sizeof(struct sadb_msg)) { 5691 n = m_pullup(n, sizeof(struct sadb_msg)); 5692 if (n == NULL) 5693 return NULL; 5694 } 5695 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5696 mtod(n, struct sadb_msg *)->sadb_msg_len = 5697 PFKEY_UNIT64(n->m_pkthdr.len); 5698 5699 return n; 5700 } 5701 5702 static int key_delete_all (struct socket *, struct mbuf *, 5703 const struct sadb_msghdr *, u_int16_t); 5704 5705 /* 5706 * SADB_DELETE processing 5707 * receive 5708 * <base, SA(*), address(SD)> 5709 * from the ikmpd, and set SADB_SASTATE_DEAD, 5710 * and send, 5711 * <base, SA(*), address(SD)> 5712 * to the ikmpd. 5713 * 5714 * m will always be freed. 5715 */ 5716 static int 5717 key_delete(struct socket *so, struct mbuf *m, 5718 const struct sadb_msghdr *mhp) 5719 { 5720 struct sadb_sa *sa0; 5721 struct sadb_address *src0, *dst0; 5722 struct secasindex saidx; 5723 struct secashead *sah; 5724 struct secasvar *sav = NULL; 5725 u_int16_t proto; 5726 int error; 5727 5728 /* sanity check */ 5729 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5730 panic("key_delete: NULL pointer is passed"); 5731 5732 /* map satype to proto */ 5733 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5734 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5735 return key_senderror(so, m, EINVAL); 5736 } 5737 5738 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5739 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5740 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5741 return key_senderror(so, m, EINVAL); 5742 } 5743 5744 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5745 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5746 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5747 return key_senderror(so, m, EINVAL); 5748 } 5749 5750 if (mhp->ext[SADB_EXT_SA] == NULL) { 5751 /* 5752 * Caller wants us to delete all non-LARVAL SAs 5753 * that match the src/dst. This is used during 5754 * IKE INITIAL-CONTACT. 5755 */ 5756 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5757 return key_delete_all(so, m, mhp, proto); 5758 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5759 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5760 return key_senderror(so, m, EINVAL); 5761 } 5762 5763 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5764 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5765 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5766 5767 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5768 dst0 + 1, &saidx)) != 0) 5769 return key_senderror(so, m, EINVAL); 5770 5771 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5772 return key_senderror(so, m, EINVAL); 5773 5774 /* get a SA header */ 5775 LIST_FOREACH(sah, &sahtree, chain) { 5776 if (sah->state == SADB_SASTATE_DEAD) 5777 continue; 5778 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5779 continue; 5780 5781 /* get a SA with SPI. */ 5782 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5783 if (sav) 5784 break; 5785 } 5786 if (sah == NULL) { 5787 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5788 return key_senderror(so, m, ENOENT); 5789 } 5790 5791 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5792 KEY_FREESAV(&sav); 5793 5794 { 5795 struct mbuf *n; 5796 struct sadb_msg *newmsg; 5797 5798 /* create new sadb_msg to reply. */ 5799 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5800 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5801 if (!n) 5802 return key_senderror(so, m, ENOBUFS); 5803 5804 if (n->m_len < sizeof(struct sadb_msg)) { 5805 n = m_pullup(n, sizeof(struct sadb_msg)); 5806 if (n == NULL) 5807 return key_senderror(so, m, ENOBUFS); 5808 } 5809 newmsg = mtod(n, struct sadb_msg *); 5810 newmsg->sadb_msg_errno = 0; 5811 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5812 5813 m_freem(m); 5814 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5815 } 5816 } 5817 5818 /* 5819 * delete all SAs for src/dst. Called from key_delete(). 5820 */ 5821 static int 5822 key_delete_all(struct socket *so, struct mbuf *m, 5823 const struct sadb_msghdr *mhp, u_int16_t proto) 5824 { 5825 struct sadb_address *src0, *dst0; 5826 struct secasindex saidx; 5827 struct secashead *sah; 5828 struct secasvar *sav, *nextsav; 5829 u_int stateidx, state; 5830 int error; 5831 5832 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5833 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5834 5835 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5836 dst0 + 1, &saidx)) != 0) 5837 return key_senderror(so, m, EINVAL); 5838 5839 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5840 return key_senderror(so, m, EINVAL); 5841 5842 LIST_FOREACH(sah, &sahtree, chain) { 5843 if (sah->state == SADB_SASTATE_DEAD) 5844 continue; 5845 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5846 continue; 5847 5848 /* Delete all non-LARVAL SAs. */ 5849 for (stateidx = 0; 5850 stateidx < _ARRAYLEN(saorder_state_alive); 5851 stateidx++) { 5852 state = saorder_state_alive[stateidx]; 5853 if (state == SADB_SASTATE_LARVAL) 5854 continue; 5855 for (sav = LIST_FIRST(&sah->savtree[state]); 5856 sav != NULL; sav = nextsav) { 5857 nextsav = LIST_NEXT(sav, chain); 5858 /* sanity check */ 5859 if (sav->state != state) { 5860 ipseclog((LOG_DEBUG, "key_delete_all: " 5861 "invalid sav->state " 5862 "(queue: %d SA: %d)\n", 5863 state, sav->state)); 5864 continue; 5865 } 5866 5867 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5868 KEY_FREESAV(&sav); 5869 } 5870 } 5871 } 5872 { 5873 struct mbuf *n; 5874 struct sadb_msg *newmsg; 5875 5876 /* create new sadb_msg to reply. */ 5877 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5878 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5879 if (!n) 5880 return key_senderror(so, m, ENOBUFS); 5881 5882 if (n->m_len < sizeof(struct sadb_msg)) { 5883 n = m_pullup(n, sizeof(struct sadb_msg)); 5884 if (n == NULL) 5885 return key_senderror(so, m, ENOBUFS); 5886 } 5887 newmsg = mtod(n, struct sadb_msg *); 5888 newmsg->sadb_msg_errno = 0; 5889 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5890 5891 m_freem(m); 5892 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5893 } 5894 } 5895 5896 /* 5897 * SADB_GET processing 5898 * receive 5899 * <base, SA(*), address(SD)> 5900 * from the ikmpd, and get a SP and a SA to respond, 5901 * and send, 5902 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5903 * (identity(SD),) (sensitivity)> 5904 * to the ikmpd. 5905 * 5906 * m will always be freed. 5907 */ 5908 static int 5909 key_get(struct socket *so, struct mbuf *m, 5910 const struct sadb_msghdr *mhp) 5911 { 5912 struct sadb_sa *sa0; 5913 struct sadb_address *src0, *dst0; 5914 struct secasindex saidx; 5915 struct secashead *sah; 5916 struct secasvar *sav = NULL; 5917 u_int16_t proto; 5918 int error; 5919 5920 /* sanity check */ 5921 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5922 panic("key_get: NULL pointer is passed"); 5923 5924 /* map satype to proto */ 5925 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5926 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5927 return key_senderror(so, m, EINVAL); 5928 } 5929 5930 if (mhp->ext[SADB_EXT_SA] == NULL || 5931 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5932 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5933 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5934 return key_senderror(so, m, EINVAL); 5935 } 5936 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5937 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5938 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5939 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5940 return key_senderror(so, m, EINVAL); 5941 } 5942 5943 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5944 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5945 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5946 5947 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5948 dst0 + 1, &saidx)) != 0) 5949 return key_senderror(so, m, EINVAL); 5950 5951 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5952 return key_senderror(so, m, EINVAL); 5953 5954 /* get a SA header */ 5955 LIST_FOREACH(sah, &sahtree, chain) { 5956 if (sah->state == SADB_SASTATE_DEAD) 5957 continue; 5958 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5959 continue; 5960 5961 /* get a SA with SPI. */ 5962 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5963 if (sav) 5964 break; 5965 } 5966 if (sah == NULL) { 5967 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5968 return key_senderror(so, m, ENOENT); 5969 } 5970 5971 { 5972 struct mbuf *n; 5973 u_int8_t satype; 5974 5975 /* map proto to satype */ 5976 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5977 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5978 return key_senderror(so, m, EINVAL); 5979 } 5980 5981 /* create new sadb_msg to reply. */ 5982 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5983 mhp->msg->sadb_msg_pid); 5984 if (!n) 5985 return key_senderror(so, m, ENOBUFS); 5986 5987 m_freem(m); 5988 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5989 } 5990 } 5991 5992 /* XXX make it sysctl-configurable? */ 5993 static void 5994 key_getcomb_setlifetime(struct sadb_comb *comb) 5995 { 5996 5997 comb->sadb_comb_soft_allocations = 1; 5998 comb->sadb_comb_hard_allocations = 1; 5999 comb->sadb_comb_soft_bytes = 0; 6000 comb->sadb_comb_hard_bytes = 0; 6001 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 6002 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 6003 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 6004 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 6005 } 6006 6007 /* 6008 * XXX reorder combinations by preference 6009 * XXX no idea if the user wants ESP authentication or not 6010 */ 6011 static struct mbuf * 6012 key_getcomb_esp(void) 6013 { 6014 struct sadb_comb *comb; 6015 const struct enc_xform *algo; 6016 struct mbuf *result = NULL, *m, *n; 6017 int encmin; 6018 int i, off, o; 6019 int totlen; 6020 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6021 6022 m = NULL; 6023 for (i = 1; i <= SADB_EALG_MAX; i++) { 6024 algo = esp_algorithm_lookup(i); 6025 if (algo == NULL) 6026 continue; 6027 6028 /* discard algorithms with key size smaller than system min */ 6029 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 6030 continue; 6031 if (_BITS(algo->minkey) < ipsec_esp_keymin) 6032 encmin = ipsec_esp_keymin; 6033 else 6034 encmin = _BITS(algo->minkey); 6035 6036 if (ipsec_esp_auth) 6037 m = key_getcomb_ah(); 6038 else { 6039 IPSEC_ASSERT(l <= MLEN, 6040 ("key_getcomb_esp: l=%u > MLEN=%lu", 6041 l, (u_long) MLEN)); 6042 MGET(m, M_DONTWAIT, MT_DATA); 6043 if (m) { 6044 M_ALIGN(m, l); 6045 m->m_len = l; 6046 m->m_next = NULL; 6047 memset(mtod(m, void *), 0, m->m_len); 6048 } 6049 } 6050 if (!m) 6051 goto fail; 6052 6053 totlen = 0; 6054 for (n = m; n; n = n->m_next) 6055 totlen += n->m_len; 6056 IPSEC_ASSERT((totlen % l) == 0, 6057 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 6058 6059 for (off = 0; off < totlen; off += l) { 6060 n = m_pulldown(m, off, l, &o); 6061 if (!n) { 6062 /* m is already freed */ 6063 goto fail; 6064 } 6065 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6066 memset(comb, 0, sizeof(*comb)); 6067 key_getcomb_setlifetime(comb); 6068 comb->sadb_comb_encrypt = i; 6069 comb->sadb_comb_encrypt_minbits = encmin; 6070 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6071 } 6072 6073 if (!result) 6074 result = m; 6075 else 6076 m_cat(result, m); 6077 } 6078 6079 return result; 6080 6081 fail: 6082 if (result) 6083 m_freem(result); 6084 return NULL; 6085 } 6086 6087 static void 6088 key_getsizes_ah(const struct auth_hash *ah, int alg, 6089 u_int16_t* ksmin, u_int16_t* ksmax) 6090 { 6091 *ksmin = *ksmax = ah->keysize; 6092 if (ah->keysize == 0) { 6093 /* 6094 * Transform takes arbitrary key size but algorithm 6095 * key size is restricted. Enforce this here. 6096 */ 6097 switch (alg) { 6098 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6099 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6100 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 6101 default: 6102 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 6103 alg)); 6104 break; 6105 } 6106 } 6107 } 6108 6109 /* 6110 * XXX reorder combinations by preference 6111 */ 6112 static struct mbuf * 6113 key_getcomb_ah(void) 6114 { 6115 struct sadb_comb *comb; 6116 const struct auth_hash *algo; 6117 struct mbuf *m; 6118 u_int16_t minkeysize, maxkeysize; 6119 int i; 6120 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6121 6122 m = NULL; 6123 for (i = 1; i <= SADB_AALG_MAX; i++) { 6124 #if 1 6125 /* we prefer HMAC algorithms, not old algorithms */ 6126 if (i != SADB_AALG_SHA1HMAC && 6127 i != SADB_AALG_MD5HMAC && 6128 i != SADB_X_AALG_SHA2_256 && 6129 i != SADB_X_AALG_SHA2_384 && 6130 i != SADB_X_AALG_SHA2_512) 6131 continue; 6132 #endif 6133 algo = ah_algorithm_lookup(i); 6134 if (!algo) 6135 continue; 6136 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6137 /* discard algorithms with key size smaller than system min */ 6138 if (_BITS(minkeysize) < ipsec_ah_keymin) 6139 continue; 6140 6141 if (!m) { 6142 IPSEC_ASSERT(l <= MLEN, 6143 ("key_getcomb_ah: l=%u > MLEN=%lu", 6144 l, (u_long) MLEN)); 6145 MGET(m, M_DONTWAIT, MT_DATA); 6146 if (m) { 6147 M_ALIGN(m, l); 6148 m->m_len = l; 6149 m->m_next = NULL; 6150 } 6151 } else 6152 M_PREPEND(m, l, M_DONTWAIT); 6153 if (!m) 6154 return NULL; 6155 6156 comb = mtod(m, struct sadb_comb *); 6157 memset(comb, 0, sizeof(*comb)); 6158 key_getcomb_setlifetime(comb); 6159 comb->sadb_comb_auth = i; 6160 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6161 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6162 } 6163 6164 return m; 6165 } 6166 6167 /* 6168 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6169 * XXX reorder combinations by preference 6170 */ 6171 static struct mbuf * 6172 key_getcomb_ipcomp(void) 6173 { 6174 struct sadb_comb *comb; 6175 const struct comp_algo *algo; 6176 struct mbuf *m; 6177 int i; 6178 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6179 6180 m = NULL; 6181 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6182 algo = ipcomp_algorithm_lookup(i); 6183 if (!algo) 6184 continue; 6185 6186 if (!m) { 6187 IPSEC_ASSERT(l <= MLEN, 6188 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 6189 l, (u_long) MLEN)); 6190 MGET(m, M_DONTWAIT, MT_DATA); 6191 if (m) { 6192 M_ALIGN(m, l); 6193 m->m_len = l; 6194 m->m_next = NULL; 6195 } 6196 } else 6197 M_PREPEND(m, l, M_DONTWAIT); 6198 if (!m) 6199 return NULL; 6200 6201 comb = mtod(m, struct sadb_comb *); 6202 memset(comb, 0, sizeof(*comb)); 6203 key_getcomb_setlifetime(comb); 6204 comb->sadb_comb_encrypt = i; 6205 /* what should we set into sadb_comb_*_{min,max}bits? */ 6206 } 6207 6208 return m; 6209 } 6210 6211 /* 6212 * XXX no way to pass mode (transport/tunnel) to userland 6213 * XXX replay checking? 6214 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6215 */ 6216 static struct mbuf * 6217 key_getprop(const struct secasindex *saidx) 6218 { 6219 struct sadb_prop *prop; 6220 struct mbuf *m, *n; 6221 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6222 int totlen; 6223 6224 switch (saidx->proto) { 6225 case IPPROTO_ESP: 6226 m = key_getcomb_esp(); 6227 break; 6228 case IPPROTO_AH: 6229 m = key_getcomb_ah(); 6230 break; 6231 case IPPROTO_IPCOMP: 6232 m = key_getcomb_ipcomp(); 6233 break; 6234 default: 6235 return NULL; 6236 } 6237 6238 if (!m) 6239 return NULL; 6240 M_PREPEND(m, l, M_DONTWAIT); 6241 if (!m) 6242 return NULL; 6243 6244 totlen = 0; 6245 for (n = m; n; n = n->m_next) 6246 totlen += n->m_len; 6247 6248 prop = mtod(m, struct sadb_prop *); 6249 memset(prop, 0, sizeof(*prop)); 6250 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6251 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6252 prop->sadb_prop_replay = 32; /* XXX */ 6253 6254 return m; 6255 } 6256 6257 /* 6258 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6259 * send 6260 * <base, SA, address(SD), (address(P)), x_policy, 6261 * (identity(SD),) (sensitivity,) proposal> 6262 * to KMD, and expect to receive 6263 * <base> with SADB_ACQUIRE if error occurred, 6264 * or 6265 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6266 * from KMD by PF_KEY. 6267 * 6268 * XXX x_policy is outside of RFC2367 (KAME extension). 6269 * XXX sensitivity is not supported. 6270 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6271 * see comment for key_getcomb_ipcomp(). 6272 * 6273 * OUT: 6274 * 0 : succeed 6275 * others: error number 6276 */ 6277 static int 6278 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6279 { 6280 struct mbuf *result = NULL, *m; 6281 #ifndef IPSEC_NONBLOCK_ACQUIRE 6282 struct secacq *newacq; 6283 #endif 6284 u_int8_t satype; 6285 int error = -1; 6286 u_int32_t seq; 6287 6288 /* sanity check */ 6289 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 6290 satype = key_proto2satype(saidx->proto); 6291 IPSEC_ASSERT(satype != 0, 6292 ("key_acquire: null satype, protocol %u", saidx->proto)); 6293 6294 #ifndef IPSEC_NONBLOCK_ACQUIRE 6295 /* 6296 * We never do anything about acquirng SA. There is anather 6297 * solution that kernel blocks to send SADB_ACQUIRE message until 6298 * getting something message from IKEd. In later case, to be 6299 * managed with ACQUIRING list. 6300 */ 6301 /* Get an entry to check whether sending message or not. */ 6302 if ((newacq = key_getacq(saidx)) != NULL) { 6303 if (key_blockacq_count < newacq->count) { 6304 /* reset counter and do send message. */ 6305 newacq->count = 0; 6306 } else { 6307 /* increment counter and do nothing. */ 6308 newacq->count++; 6309 return 0; 6310 } 6311 } else { 6312 /* make new entry for blocking to send SADB_ACQUIRE. */ 6313 if ((newacq = key_newacq(saidx)) == NULL) 6314 return ENOBUFS; 6315 6316 /* add to acqtree */ 6317 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6318 } 6319 #endif 6320 6321 6322 #ifndef IPSEC_NONBLOCK_ACQUIRE 6323 seq = newacq->seq; 6324 #else 6325 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6326 #endif 6327 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6328 if (!m) { 6329 error = ENOBUFS; 6330 goto fail; 6331 } 6332 result = m; 6333 6334 /* set sadb_address for saidx's. */ 6335 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6336 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6337 if (!m) { 6338 error = ENOBUFS; 6339 goto fail; 6340 } 6341 m_cat(result, m); 6342 6343 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6344 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6345 if (!m) { 6346 error = ENOBUFS; 6347 goto fail; 6348 } 6349 m_cat(result, m); 6350 6351 /* XXX proxy address (optional) */ 6352 6353 /* set sadb_x_policy */ 6354 if (sp) { 6355 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6356 if (!m) { 6357 error = ENOBUFS; 6358 goto fail; 6359 } 6360 m_cat(result, m); 6361 } 6362 6363 /* XXX identity (optional) */ 6364 #if 0 6365 if (idexttype && fqdn) { 6366 /* create identity extension (FQDN) */ 6367 struct sadb_ident *id; 6368 int fqdnlen; 6369 6370 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6371 id = (struct sadb_ident *)p; 6372 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6373 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6374 id->sadb_ident_exttype = idexttype; 6375 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6376 memcpy(id + 1, fqdn, fqdnlen); 6377 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6378 } 6379 6380 if (idexttype) { 6381 /* create identity extension (USERFQDN) */ 6382 struct sadb_ident *id; 6383 int userfqdnlen; 6384 6385 if (userfqdn) { 6386 /* +1 for terminating-NUL */ 6387 userfqdnlen = strlen(userfqdn) + 1; 6388 } else 6389 userfqdnlen = 0; 6390 id = (struct sadb_ident *)p; 6391 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6392 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6393 id->sadb_ident_exttype = idexttype; 6394 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6395 /* XXX is it correct? */ 6396 if (curlwp) 6397 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6398 if (userfqdn && userfqdnlen) 6399 memcpy(id + 1, userfqdn, userfqdnlen); 6400 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6401 } 6402 #endif 6403 6404 /* XXX sensitivity (optional) */ 6405 6406 /* create proposal/combination extension */ 6407 m = key_getprop(saidx); 6408 #if 0 6409 /* 6410 * spec conformant: always attach proposal/combination extension, 6411 * the problem is that we have no way to attach it for ipcomp, 6412 * due to the way sadb_comb is declared in RFC2367. 6413 */ 6414 if (!m) { 6415 error = ENOBUFS; 6416 goto fail; 6417 } 6418 m_cat(result, m); 6419 #else 6420 /* 6421 * outside of spec; make proposal/combination extension optional. 6422 */ 6423 if (m) 6424 m_cat(result, m); 6425 #endif 6426 6427 if ((result->m_flags & M_PKTHDR) == 0) { 6428 error = EINVAL; 6429 goto fail; 6430 } 6431 6432 if (result->m_len < sizeof(struct sadb_msg)) { 6433 result = m_pullup(result, sizeof(struct sadb_msg)); 6434 if (result == NULL) { 6435 error = ENOBUFS; 6436 goto fail; 6437 } 6438 } 6439 6440 result->m_pkthdr.len = 0; 6441 for (m = result; m; m = m->m_next) 6442 result->m_pkthdr.len += m->m_len; 6443 6444 mtod(result, struct sadb_msg *)->sadb_msg_len = 6445 PFKEY_UNIT64(result->m_pkthdr.len); 6446 6447 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6448 6449 fail: 6450 if (result) 6451 m_freem(result); 6452 return error; 6453 } 6454 6455 #ifndef IPSEC_NONBLOCK_ACQUIRE 6456 static struct secacq * 6457 key_newacq(const struct secasindex *saidx) 6458 { 6459 struct secacq *newacq; 6460 6461 /* get new entry */ 6462 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6463 if (newacq == NULL) { 6464 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6465 return NULL; 6466 } 6467 memset(newacq, 0, sizeof(*newacq)); 6468 6469 /* copy secindex */ 6470 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6471 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6472 newacq->created = time_uptime; 6473 newacq->count = 0; 6474 6475 return newacq; 6476 } 6477 6478 static struct secacq * 6479 key_getacq(const struct secasindex *saidx) 6480 { 6481 struct secacq *acq; 6482 6483 LIST_FOREACH(acq, &acqtree, chain) { 6484 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6485 return acq; 6486 } 6487 6488 return NULL; 6489 } 6490 6491 static struct secacq * 6492 key_getacqbyseq(u_int32_t seq) 6493 { 6494 struct secacq *acq; 6495 6496 LIST_FOREACH(acq, &acqtree, chain) { 6497 if (acq->seq == seq) 6498 return acq; 6499 } 6500 6501 return NULL; 6502 } 6503 #endif 6504 6505 static struct secspacq * 6506 key_newspacq(const struct secpolicyindex *spidx) 6507 { 6508 struct secspacq *acq; 6509 6510 /* get new entry */ 6511 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6512 if (acq == NULL) { 6513 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6514 return NULL; 6515 } 6516 memset(acq, 0, sizeof(*acq)); 6517 6518 /* copy secindex */ 6519 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6520 acq->created = time_uptime; 6521 acq->count = 0; 6522 6523 return acq; 6524 } 6525 6526 static struct secspacq * 6527 key_getspacq(const struct secpolicyindex *spidx) 6528 { 6529 struct secspacq *acq; 6530 6531 LIST_FOREACH(acq, &spacqtree, chain) { 6532 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6533 return acq; 6534 } 6535 6536 return NULL; 6537 } 6538 6539 /* 6540 * SADB_ACQUIRE processing, 6541 * in first situation, is receiving 6542 * <base> 6543 * from the ikmpd, and clear sequence of its secasvar entry. 6544 * 6545 * In second situation, is receiving 6546 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6547 * from a user land process, and return 6548 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6549 * to the socket. 6550 * 6551 * m will always be freed. 6552 */ 6553 static int 6554 key_acquire2(struct socket *so, struct mbuf *m, 6555 const struct sadb_msghdr *mhp) 6556 { 6557 const struct sadb_address *src0, *dst0; 6558 struct secasindex saidx; 6559 struct secashead *sah; 6560 u_int16_t proto; 6561 int error; 6562 6563 /* sanity check */ 6564 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6565 panic("key_acquire2: NULL pointer is passed"); 6566 6567 /* 6568 * Error message from KMd. 6569 * We assume that if error was occurred in IKEd, the length of PFKEY 6570 * message is equal to the size of sadb_msg structure. 6571 * We do not raise error even if error occurred in this function. 6572 */ 6573 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6574 #ifndef IPSEC_NONBLOCK_ACQUIRE 6575 struct secacq *acq; 6576 6577 /* check sequence number */ 6578 if (mhp->msg->sadb_msg_seq == 0) { 6579 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6580 m_freem(m); 6581 return 0; 6582 } 6583 6584 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6585 /* 6586 * the specified larval SA is already gone, or we got 6587 * a bogus sequence number. we can silently ignore it. 6588 */ 6589 m_freem(m); 6590 return 0; 6591 } 6592 6593 /* reset acq counter in order to deletion by timehander. */ 6594 acq->created = time_uptime; 6595 acq->count = 0; 6596 #endif 6597 m_freem(m); 6598 return 0; 6599 } 6600 6601 /* 6602 * This message is from user land. 6603 */ 6604 6605 /* map satype to proto */ 6606 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6607 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6608 return key_senderror(so, m, EINVAL); 6609 } 6610 6611 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6612 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6613 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6614 /* error */ 6615 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6616 return key_senderror(so, m, EINVAL); 6617 } 6618 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6619 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6620 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6621 /* error */ 6622 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6623 return key_senderror(so, m, EINVAL); 6624 } 6625 6626 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6627 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6628 6629 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 6630 dst0 + 1, &saidx)) != 0) 6631 return key_senderror(so, m, EINVAL); 6632 6633 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 6634 return key_senderror(so, m, EINVAL); 6635 6636 /* get a SA index */ 6637 LIST_FOREACH(sah, &sahtree, chain) { 6638 if (sah->state == SADB_SASTATE_DEAD) 6639 continue; 6640 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6641 break; 6642 } 6643 if (sah != NULL) { 6644 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6645 return key_senderror(so, m, EEXIST); 6646 } 6647 6648 error = key_acquire(&saidx, NULL); 6649 if (error != 0) { 6650 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6651 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6652 return key_senderror(so, m, error); 6653 } 6654 6655 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6656 } 6657 6658 /* 6659 * SADB_REGISTER processing. 6660 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6661 * receive 6662 * <base> 6663 * from the ikmpd, and register a socket to send PF_KEY messages, 6664 * and send 6665 * <base, supported> 6666 * to KMD by PF_KEY. 6667 * If socket is detached, must free from regnode. 6668 * 6669 * m will always be freed. 6670 */ 6671 static int 6672 key_register(struct socket *so, struct mbuf *m, 6673 const struct sadb_msghdr *mhp) 6674 { 6675 struct secreg *reg, *newreg = 0; 6676 6677 /* sanity check */ 6678 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6679 panic("key_register: NULL pointer is passed"); 6680 6681 /* check for invalid register message */ 6682 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6683 return key_senderror(so, m, EINVAL); 6684 6685 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6686 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6687 goto setmsg; 6688 6689 /* check whether existing or not */ 6690 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6691 if (reg->so == so) { 6692 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6693 return key_senderror(so, m, EEXIST); 6694 } 6695 } 6696 6697 /* create regnode */ 6698 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6699 if (newreg == NULL) { 6700 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6701 return key_senderror(so, m, ENOBUFS); 6702 } 6703 memset(newreg, 0, sizeof(*newreg)); 6704 6705 newreg->so = so; 6706 ((struct keycb *)sotorawcb(so))->kp_registered++; 6707 6708 /* add regnode to regtree. */ 6709 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6710 6711 setmsg: 6712 { 6713 struct mbuf *n; 6714 struct sadb_msg *newmsg; 6715 struct sadb_supported *sup; 6716 u_int len, alen, elen; 6717 int off; 6718 int i; 6719 struct sadb_alg *alg; 6720 6721 /* create new sadb_msg to reply. */ 6722 alen = 0; 6723 for (i = 1; i <= SADB_AALG_MAX; i++) { 6724 if (ah_algorithm_lookup(i)) 6725 alen += sizeof(struct sadb_alg); 6726 } 6727 if (alen) 6728 alen += sizeof(struct sadb_supported); 6729 elen = 0; 6730 for (i = 1; i <= SADB_EALG_MAX; i++) { 6731 if (esp_algorithm_lookup(i)) 6732 elen += sizeof(struct sadb_alg); 6733 } 6734 if (elen) 6735 elen += sizeof(struct sadb_supported); 6736 6737 len = sizeof(struct sadb_msg) + alen + elen; 6738 6739 if (len > MCLBYTES) 6740 return key_senderror(so, m, ENOBUFS); 6741 6742 MGETHDR(n, M_DONTWAIT, MT_DATA); 6743 if (len > MHLEN) { 6744 MCLGET(n, M_DONTWAIT); 6745 if ((n->m_flags & M_EXT) == 0) { 6746 m_freem(n); 6747 n = NULL; 6748 } 6749 } 6750 if (!n) 6751 return key_senderror(so, m, ENOBUFS); 6752 6753 n->m_pkthdr.len = n->m_len = len; 6754 n->m_next = NULL; 6755 off = 0; 6756 6757 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6758 newmsg = mtod(n, struct sadb_msg *); 6759 newmsg->sadb_msg_errno = 0; 6760 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6761 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6762 6763 /* for authentication algorithm */ 6764 if (alen) { 6765 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6766 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6767 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6768 off += PFKEY_ALIGN8(sizeof(*sup)); 6769 6770 for (i = 1; i <= SADB_AALG_MAX; i++) { 6771 const struct auth_hash *aalgo; 6772 u_int16_t minkeysize, maxkeysize; 6773 6774 aalgo = ah_algorithm_lookup(i); 6775 if (!aalgo) 6776 continue; 6777 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6778 alg->sadb_alg_id = i; 6779 alg->sadb_alg_ivlen = 0; 6780 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6781 alg->sadb_alg_minbits = _BITS(minkeysize); 6782 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6783 off += PFKEY_ALIGN8(sizeof(*alg)); 6784 } 6785 } 6786 6787 /* for encryption algorithm */ 6788 if (elen) { 6789 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6790 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6791 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6792 off += PFKEY_ALIGN8(sizeof(*sup)); 6793 6794 for (i = 1; i <= SADB_EALG_MAX; i++) { 6795 const struct enc_xform *ealgo; 6796 6797 ealgo = esp_algorithm_lookup(i); 6798 if (!ealgo) 6799 continue; 6800 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6801 alg->sadb_alg_id = i; 6802 alg->sadb_alg_ivlen = ealgo->blocksize; 6803 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6804 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6805 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6806 } 6807 } 6808 6809 #ifdef DIAGNOSTIC 6810 if (off != len) 6811 panic("length assumption failed in key_register"); 6812 #endif 6813 6814 m_freem(m); 6815 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6816 } 6817 } 6818 6819 /* 6820 * free secreg entry registered. 6821 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6822 */ 6823 void 6824 key_freereg(struct socket *so) 6825 { 6826 struct secreg *reg; 6827 int i; 6828 6829 /* sanity check */ 6830 if (so == NULL) 6831 panic("key_freereg: NULL pointer is passed"); 6832 6833 /* 6834 * check whether existing or not. 6835 * check all type of SA, because there is a potential that 6836 * one socket is registered to multiple type of SA. 6837 */ 6838 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6839 LIST_FOREACH(reg, ®tree[i], chain) { 6840 if (reg->so == so 6841 && __LIST_CHAINED(reg)) { 6842 LIST_REMOVE(reg, chain); 6843 KFREE(reg); 6844 break; 6845 } 6846 } 6847 } 6848 6849 return; 6850 } 6851 6852 /* 6853 * SADB_EXPIRE processing 6854 * send 6855 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6856 * to KMD by PF_KEY. 6857 * NOTE: We send only soft lifetime extension. 6858 * 6859 * OUT: 0 : succeed 6860 * others : error number 6861 */ 6862 static int 6863 key_expire(struct secasvar *sav) 6864 { 6865 int s; 6866 int satype; 6867 struct mbuf *result = NULL, *m; 6868 int len; 6869 int error = -1; 6870 struct sadb_lifetime *lt; 6871 6872 /* XXX: Why do we lock ? */ 6873 s = splsoftnet(); /*called from softclock()*/ 6874 6875 /* sanity check */ 6876 if (sav == NULL) 6877 panic("key_expire: NULL pointer is passed"); 6878 if (sav->sah == NULL) 6879 panic("key_expire: Why was SA index in SA NULL"); 6880 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6881 panic("key_expire: invalid proto is passed"); 6882 6883 /* set msg header */ 6884 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6885 if (!m) { 6886 error = ENOBUFS; 6887 goto fail; 6888 } 6889 result = m; 6890 6891 /* create SA extension */ 6892 m = key_setsadbsa(sav); 6893 if (!m) { 6894 error = ENOBUFS; 6895 goto fail; 6896 } 6897 m_cat(result, m); 6898 6899 /* create SA extension */ 6900 m = key_setsadbxsa2(sav->sah->saidx.mode, 6901 sav->replay ? sav->replay->count : 0, 6902 sav->sah->saidx.reqid); 6903 if (!m) { 6904 error = ENOBUFS; 6905 goto fail; 6906 } 6907 m_cat(result, m); 6908 6909 /* create lifetime extension (current and soft) */ 6910 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6911 m = key_alloc_mbuf(len); 6912 if (!m || m->m_next) { /*XXX*/ 6913 if (m) 6914 m_freem(m); 6915 error = ENOBUFS; 6916 goto fail; 6917 } 6918 memset(mtod(m, void *), 0, len); 6919 lt = mtod(m, struct sadb_lifetime *); 6920 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6921 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6922 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6923 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6924 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime 6925 + time_second - time_uptime; 6926 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime 6927 + time_second - time_uptime; 6928 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6929 memcpy(lt, sav->lft_s, sizeof(*lt)); 6930 m_cat(result, m); 6931 6932 /* set sadb_address for source */ 6933 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6934 &sav->sah->saidx.src.sa, 6935 FULLMASK, IPSEC_ULPROTO_ANY); 6936 if (!m) { 6937 error = ENOBUFS; 6938 goto fail; 6939 } 6940 m_cat(result, m); 6941 6942 /* set sadb_address for destination */ 6943 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6944 &sav->sah->saidx.dst.sa, 6945 FULLMASK, IPSEC_ULPROTO_ANY); 6946 if (!m) { 6947 error = ENOBUFS; 6948 goto fail; 6949 } 6950 m_cat(result, m); 6951 6952 if ((result->m_flags & M_PKTHDR) == 0) { 6953 error = EINVAL; 6954 goto fail; 6955 } 6956 6957 if (result->m_len < sizeof(struct sadb_msg)) { 6958 result = m_pullup(result, sizeof(struct sadb_msg)); 6959 if (result == NULL) { 6960 error = ENOBUFS; 6961 goto fail; 6962 } 6963 } 6964 6965 result->m_pkthdr.len = 0; 6966 for (m = result; m; m = m->m_next) 6967 result->m_pkthdr.len += m->m_len; 6968 6969 mtod(result, struct sadb_msg *)->sadb_msg_len = 6970 PFKEY_UNIT64(result->m_pkthdr.len); 6971 6972 splx(s); 6973 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6974 6975 fail: 6976 if (result) 6977 m_freem(result); 6978 splx(s); 6979 return error; 6980 } 6981 6982 /* 6983 * SADB_FLUSH processing 6984 * receive 6985 * <base> 6986 * from the ikmpd, and free all entries in secastree. 6987 * and send, 6988 * <base> 6989 * to the ikmpd. 6990 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6991 * 6992 * m will always be freed. 6993 */ 6994 static int 6995 key_flush(struct socket *so, struct mbuf *m, 6996 const struct sadb_msghdr *mhp) 6997 { 6998 struct sadb_msg *newmsg; 6999 struct secashead *sah, *nextsah; 7000 struct secasvar *sav, *nextsav; 7001 u_int16_t proto; 7002 u_int8_t state; 7003 u_int stateidx; 7004 7005 /* sanity check */ 7006 if (so == NULL || mhp == NULL || mhp->msg == NULL) 7007 panic("key_flush: NULL pointer is passed"); 7008 7009 /* map satype to proto */ 7010 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7011 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 7012 return key_senderror(so, m, EINVAL); 7013 } 7014 7015 /* no SATYPE specified, i.e. flushing all SA. */ 7016 for (sah = LIST_FIRST(&sahtree); 7017 sah != NULL; 7018 sah = nextsah) { 7019 nextsah = LIST_NEXT(sah, chain); 7020 7021 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7022 && proto != sah->saidx.proto) 7023 continue; 7024 7025 for (stateidx = 0; 7026 stateidx < _ARRAYLEN(saorder_state_alive); 7027 stateidx++) { 7028 state = saorder_state_any[stateidx]; 7029 for (sav = LIST_FIRST(&sah->savtree[state]); 7030 sav != NULL; 7031 sav = nextsav) { 7032 7033 nextsav = LIST_NEXT(sav, chain); 7034 7035 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7036 KEY_FREESAV(&sav); 7037 } 7038 } 7039 7040 sah->state = SADB_SASTATE_DEAD; 7041 } 7042 7043 if (m->m_len < sizeof(struct sadb_msg) || 7044 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7045 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 7046 return key_senderror(so, m, ENOBUFS); 7047 } 7048 7049 if (m->m_next) 7050 m_freem(m->m_next); 7051 m->m_next = NULL; 7052 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7053 newmsg = mtod(m, struct sadb_msg *); 7054 newmsg->sadb_msg_errno = 0; 7055 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7056 7057 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7058 } 7059 7060 7061 static struct mbuf * 7062 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 7063 { 7064 struct secashead *sah; 7065 struct secasvar *sav; 7066 u_int16_t proto; 7067 u_int stateidx; 7068 u_int8_t satype; 7069 u_int8_t state; 7070 int cnt; 7071 struct mbuf *m, *n, *prev; 7072 7073 *lenp = 0; 7074 7075 /* map satype to proto */ 7076 if ((proto = key_satype2proto(req_satype)) == 0) { 7077 *errorp = EINVAL; 7078 return (NULL); 7079 } 7080 7081 /* count sav entries to be sent to userland. */ 7082 cnt = 0; 7083 LIST_FOREACH(sah, &sahtree, chain) { 7084 if (req_satype != SADB_SATYPE_UNSPEC && 7085 proto != sah->saidx.proto) 7086 continue; 7087 7088 for (stateidx = 0; 7089 stateidx < _ARRAYLEN(saorder_state_any); 7090 stateidx++) { 7091 state = saorder_state_any[stateidx]; 7092 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7093 cnt++; 7094 } 7095 } 7096 } 7097 7098 if (cnt == 0) { 7099 *errorp = ENOENT; 7100 return (NULL); 7101 } 7102 7103 /* send this to the userland, one at a time. */ 7104 m = NULL; 7105 prev = m; 7106 LIST_FOREACH(sah, &sahtree, chain) { 7107 if (req_satype != SADB_SATYPE_UNSPEC && 7108 proto != sah->saidx.proto) 7109 continue; 7110 7111 /* map proto to satype */ 7112 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7113 m_freem(m); 7114 *errorp = EINVAL; 7115 return (NULL); 7116 } 7117 7118 for (stateidx = 0; 7119 stateidx < _ARRAYLEN(saorder_state_any); 7120 stateidx++) { 7121 state = saorder_state_any[stateidx]; 7122 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7123 n = key_setdumpsa(sav, SADB_DUMP, satype, 7124 --cnt, pid); 7125 if (!n) { 7126 m_freem(m); 7127 *errorp = ENOBUFS; 7128 return (NULL); 7129 } 7130 7131 if (!m) 7132 m = n; 7133 else 7134 prev->m_nextpkt = n; 7135 prev = n; 7136 } 7137 } 7138 } 7139 7140 if (!m) { 7141 *errorp = EINVAL; 7142 return (NULL); 7143 } 7144 7145 if ((m->m_flags & M_PKTHDR) != 0) { 7146 m->m_pkthdr.len = 0; 7147 for (n = m; n; n = n->m_next) 7148 m->m_pkthdr.len += n->m_len; 7149 } 7150 7151 *errorp = 0; 7152 return (m); 7153 } 7154 7155 /* 7156 * SADB_DUMP processing 7157 * dump all entries including status of DEAD in SAD. 7158 * receive 7159 * <base> 7160 * from the ikmpd, and dump all secasvar leaves 7161 * and send, 7162 * <base> ..... 7163 * to the ikmpd. 7164 * 7165 * m will always be freed. 7166 */ 7167 static int 7168 key_dump(struct socket *so, struct mbuf *m0, 7169 const struct sadb_msghdr *mhp) 7170 { 7171 u_int16_t proto; 7172 u_int8_t satype; 7173 struct mbuf *n; 7174 int s; 7175 int error, len, ok; 7176 7177 /* sanity check */ 7178 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 7179 panic("key_dump: NULL pointer is passed"); 7180 7181 /* map satype to proto */ 7182 satype = mhp->msg->sadb_msg_satype; 7183 if ((proto = key_satype2proto(satype)) == 0) { 7184 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 7185 return key_senderror(so, m0, EINVAL); 7186 } 7187 7188 /* 7189 * If the requestor has insufficient socket-buffer space 7190 * for the entire chain, nobody gets any response to the DUMP. 7191 * XXX For now, only the requestor ever gets anything. 7192 * Moreover, if the requestor has any space at all, they receive 7193 * the entire chain, otherwise the request is refused with ENOBUFS. 7194 */ 7195 if (sbspace(&so->so_rcv) <= 0) { 7196 return key_senderror(so, m0, ENOBUFS); 7197 } 7198 7199 s = splsoftnet(); 7200 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7201 splx(s); 7202 7203 if (n == NULL) { 7204 return key_senderror(so, m0, ENOENT); 7205 } 7206 { 7207 uint64_t *ps = PFKEY_STAT_GETREF(); 7208 ps[PFKEY_STAT_IN_TOTAL]++; 7209 ps[PFKEY_STAT_IN_BYTES] += len; 7210 PFKEY_STAT_PUTREF(); 7211 } 7212 7213 /* 7214 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7215 * The requestor receives either the entire chain, or an 7216 * error message with ENOBUFS. 7217 * 7218 * sbappendaddrchain() takes the chain of entries, one 7219 * packet-record per SPD entry, prepends the key_src sockaddr 7220 * to each packet-record, links the sockaddr mbufs into a new 7221 * list of records, then appends the entire resulting 7222 * list to the requesting socket. 7223 */ 7224 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 7225 n, SB_PRIO_ONESHOT_OVERFLOW); 7226 7227 if (!ok) { 7228 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7229 m_freem(n); 7230 return key_senderror(so, m0, ENOBUFS); 7231 } 7232 7233 m_freem(m0); 7234 return 0; 7235 } 7236 7237 /* 7238 * SADB_X_PROMISC processing 7239 * 7240 * m will always be freed. 7241 */ 7242 static int 7243 key_promisc(struct socket *so, struct mbuf *m, 7244 const struct sadb_msghdr *mhp) 7245 { 7246 int olen; 7247 7248 /* sanity check */ 7249 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 7250 panic("key_promisc: NULL pointer is passed"); 7251 7252 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7253 7254 if (olen < sizeof(struct sadb_msg)) { 7255 #if 1 7256 return key_senderror(so, m, EINVAL); 7257 #else 7258 m_freem(m); 7259 return 0; 7260 #endif 7261 } else if (olen == sizeof(struct sadb_msg)) { 7262 /* enable/disable promisc mode */ 7263 struct keycb *kp; 7264 7265 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7266 return key_senderror(so, m, EINVAL); 7267 mhp->msg->sadb_msg_errno = 0; 7268 switch (mhp->msg->sadb_msg_satype) { 7269 case 0: 7270 case 1: 7271 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7272 break; 7273 default: 7274 return key_senderror(so, m, EINVAL); 7275 } 7276 7277 /* send the original message back to everyone */ 7278 mhp->msg->sadb_msg_errno = 0; 7279 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7280 } else { 7281 /* send packet as is */ 7282 7283 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7284 7285 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7286 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7287 } 7288 } 7289 7290 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7291 const struct sadb_msghdr *) = { 7292 NULL, /* SADB_RESERVED */ 7293 key_getspi, /* SADB_GETSPI */ 7294 key_update, /* SADB_UPDATE */ 7295 key_add, /* SADB_ADD */ 7296 key_delete, /* SADB_DELETE */ 7297 key_get, /* SADB_GET */ 7298 key_acquire2, /* SADB_ACQUIRE */ 7299 key_register, /* SADB_REGISTER */ 7300 NULL, /* SADB_EXPIRE */ 7301 key_flush, /* SADB_FLUSH */ 7302 key_dump, /* SADB_DUMP */ 7303 key_promisc, /* SADB_X_PROMISC */ 7304 NULL, /* SADB_X_PCHANGE */ 7305 key_spdadd, /* SADB_X_SPDUPDATE */ 7306 key_spdadd, /* SADB_X_SPDADD */ 7307 key_spddelete, /* SADB_X_SPDDELETE */ 7308 key_spdget, /* SADB_X_SPDGET */ 7309 NULL, /* SADB_X_SPDACQUIRE */ 7310 key_spddump, /* SADB_X_SPDDUMP */ 7311 key_spdflush, /* SADB_X_SPDFLUSH */ 7312 key_spdadd, /* SADB_X_SPDSETIDX */ 7313 NULL, /* SADB_X_SPDEXPIRE */ 7314 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7315 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7316 }; 7317 7318 /* 7319 * parse sadb_msg buffer to process PFKEYv2, 7320 * and create a data to response if needed. 7321 * I think to be dealed with mbuf directly. 7322 * IN: 7323 * msgp : pointer to pointer to a received buffer pulluped. 7324 * This is rewrited to response. 7325 * so : pointer to socket. 7326 * OUT: 7327 * length for buffer to send to user process. 7328 */ 7329 int 7330 key_parse(struct mbuf *m, struct socket *so) 7331 { 7332 struct sadb_msg *msg; 7333 struct sadb_msghdr mh; 7334 u_int orglen; 7335 int error; 7336 int target; 7337 7338 /* sanity check */ 7339 if (m == NULL || so == NULL) 7340 panic("key_parse: NULL pointer is passed"); 7341 7342 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7343 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7344 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 7345 kdebug_sadb(msg)); 7346 #endif 7347 7348 if (m->m_len < sizeof(struct sadb_msg)) { 7349 m = m_pullup(m, sizeof(struct sadb_msg)); 7350 if (!m) 7351 return ENOBUFS; 7352 } 7353 msg = mtod(m, struct sadb_msg *); 7354 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7355 target = KEY_SENDUP_ONE; 7356 7357 if ((m->m_flags & M_PKTHDR) == 0 || 7358 m->m_pkthdr.len != orglen) { 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 Tue Sep 23 07:09:52 GMT 2025