key.c revision 1.153
1 /* $NetBSD: key.c,v 1.153 2017/05/31 04:02:05 ozaki-r Exp $ */ 2 /* $FreeBSD: src/sys/netipsec/key.c,v 1.3.2.3 2004/02/14 22:23:23 bms Exp $ */ 3 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: key.c,v 1.153 2017/05/31 04:02:05 ozaki-r Exp $"); 36 37 /* 38 * This code is referd to RFC 2367 39 */ 40 41 #if defined(_KERNEL_OPT) 42 #include "opt_inet.h" 43 #include "opt_ipsec.h" 44 #include "opt_gateway.h" 45 #endif 46 47 #include <sys/types.h> 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/callout.h> 51 #include <sys/kernel.h> 52 #include <sys/mbuf.h> 53 #include <sys/domain.h> 54 #include <sys/protosw.h> 55 #include <sys/socket.h> 56 #include <sys/socketvar.h> 57 #include <sys/sysctl.h> 58 #include <sys/errno.h> 59 #include <sys/proc.h> 60 #include <sys/queue.h> 61 #include <sys/syslog.h> 62 #include <sys/once.h> 63 #include <sys/cprng.h> 64 #include <sys/psref.h> 65 #include <sys/lwp.h> 66 #include <sys/workqueue.h> 67 #include <sys/kmem.h> 68 #include <sys/cpu.h> 69 #include <sys/atomic.h> 70 71 #include <net/if.h> 72 #include <net/route.h> 73 #include <net/raw_cb.h> 74 75 #include <netinet/in.h> 76 #include <netinet/in_systm.h> 77 #include <netinet/ip.h> 78 #include <netinet/in_var.h> 79 #ifdef INET 80 #include <netinet/ip_var.h> 81 #endif 82 83 #ifdef INET6 84 #include <netinet/ip6.h> 85 #include <netinet6/in6_var.h> 86 #include <netinet6/ip6_var.h> 87 #endif /* INET6 */ 88 89 #ifdef INET 90 #include <netinet/in_pcb.h> 91 #endif 92 #ifdef INET6 93 #include <netinet6/in6_pcb.h> 94 #endif /* INET6 */ 95 96 #include <net/pfkeyv2.h> 97 #include <netipsec/keydb.h> 98 #include <netipsec/key.h> 99 #include <netipsec/keysock.h> 100 #include <netipsec/key_debug.h> 101 102 #include <netipsec/ipsec.h> 103 #ifdef INET6 104 #include <netipsec/ipsec6.h> 105 #endif 106 #include <netipsec/ipsec_private.h> 107 108 #include <netipsec/xform.h> 109 #include <netipsec/ipcomp.h> 110 111 112 #include <net/net_osdep.h> 113 114 #define FULLMASK 0xff 115 #define _BITS(bytes) ((bytes) << 3) 116 117 #define PORT_NONE 0 118 #define PORT_LOOSE 1 119 #define PORT_STRICT 2 120 121 percpu_t *pfkeystat_percpu; 122 123 /* 124 * Note on SA reference counting: 125 * - SAs that are not in DEAD state will have (total external reference + 1) 126 * following value in reference count field. they cannot be freed and are 127 * referenced from SA header. 128 * - SAs that are in DEAD state will have (total external reference) 129 * in reference count field. they are ready to be freed. reference from 130 * SA header will be removed in key_delsav(), when the reference count 131 * field hits 0 (= no external reference other than from SA header. 132 */ 133 134 u_int32_t key_debug_level = 0; 135 static u_int key_spi_trycnt = 1000; 136 static u_int32_t key_spi_minval = 0x100; 137 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 138 static u_int32_t policy_id = 0; 139 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 140 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 141 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 142 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 143 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 144 145 static u_int32_t acq_seq = 0; 146 147 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 148 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 149 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 150 /* registed list */ 151 #ifndef IPSEC_NONBLOCK_ACQUIRE 152 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 153 #endif 154 #ifdef notyet 155 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 156 #endif 157 158 /* 159 * Protect regtree, acqtree and items stored in the lists. 160 */ 161 static kmutex_t key_mtx __cacheline_aligned; 162 163 /* search order for SAs */ 164 /* 165 * This order is important because we must select the oldest SA 166 * for outbound processing. For inbound, This is not important. 167 */ 168 static const u_int saorder_state_valid_prefer_old[] = { 169 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 170 }; 171 static const u_int saorder_state_valid_prefer_new[] = { 172 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 173 }; 174 175 static const u_int saorder_state_alive[] = { 176 /* except DEAD */ 177 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 178 }; 179 static const u_int saorder_state_any[] = { 180 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 181 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 182 }; 183 184 #define SASTATE_ALIVE_FOREACH(s) \ 185 for (int _i = 0; \ 186 _i < __arraycount(saorder_state_alive) ? \ 187 (s) = saorder_state_alive[_i], true : false; \ 188 _i++) 189 #define SASTATE_ANY_FOREACH(s) \ 190 for (int _i = 0; \ 191 _i < __arraycount(saorder_state_any) ? \ 192 (s) = saorder_state_any[_i], true : false; \ 193 _i++) 194 195 static const int minsize[] = { 196 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 197 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 198 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 199 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 200 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 201 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 202 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 203 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 204 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 205 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 206 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 207 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 208 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 209 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 210 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 211 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 212 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 213 0, /* SADB_X_EXT_KMPRIVATE */ 214 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 215 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 216 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 217 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 218 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 219 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 220 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 221 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 222 }; 223 static const int maxsize[] = { 224 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 225 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 226 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 227 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 228 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 229 0, /* SADB_EXT_ADDRESS_SRC */ 230 0, /* SADB_EXT_ADDRESS_DST */ 231 0, /* SADB_EXT_ADDRESS_PROXY */ 232 0, /* SADB_EXT_KEY_AUTH */ 233 0, /* SADB_EXT_KEY_ENCRYPT */ 234 0, /* SADB_EXT_IDENTITY_SRC */ 235 0, /* SADB_EXT_IDENTITY_DST */ 236 0, /* SADB_EXT_SENSITIVITY */ 237 0, /* SADB_EXT_PROPOSAL */ 238 0, /* SADB_EXT_SUPPORTED_AUTH */ 239 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 240 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 241 0, /* SADB_X_EXT_KMPRIVATE */ 242 0, /* SADB_X_EXT_POLICY */ 243 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 244 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 245 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 246 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 247 0, /* SADB_X_EXT_NAT_T_OAI */ 248 0, /* SADB_X_EXT_NAT_T_OAR */ 249 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 250 }; 251 252 static int ipsec_esp_keymin = 256; 253 static int ipsec_esp_auth = 0; 254 static int ipsec_ah_keymin = 128; 255 256 #ifdef SYSCTL_DECL 257 SYSCTL_DECL(_net_key); 258 #endif 259 260 #ifdef SYSCTL_INT 261 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 262 &key_debug_level, 0, ""); 263 264 /* max count of trial for the decision of spi value */ 265 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 266 &key_spi_trycnt, 0, ""); 267 268 /* minimum spi value to allocate automatically. */ 269 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 270 &key_spi_minval, 0, ""); 271 272 /* maximun spi value to allocate automatically. */ 273 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 274 &key_spi_maxval, 0, ""); 275 276 /* interval to initialize randseed */ 277 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 278 &key_int_random, 0, ""); 279 280 /* lifetime for larval SA */ 281 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 282 &key_larval_lifetime, 0, ""); 283 284 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 285 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 286 &key_blockacq_count, 0, ""); 287 288 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 289 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 290 &key_blockacq_lifetime, 0, ""); 291 292 /* ESP auth */ 293 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 294 &ipsec_esp_auth, 0, ""); 295 296 /* minimum ESP key length */ 297 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 298 &ipsec_esp_keymin, 0, ""); 299 300 /* minimum AH key length */ 301 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 302 &ipsec_ah_keymin, 0, ""); 303 304 /* perfered old SA rather than new SA */ 305 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 306 &key_prefered_oldsa, 0, ""); 307 #endif /* SYSCTL_INT */ 308 309 #define __LIST_CHAINED(elm) \ 310 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 311 #define LIST_INSERT_TAIL(head, elm, type, field) \ 312 do {\ 313 struct type *curelm = LIST_FIRST(head); \ 314 if (curelm == NULL) {\ 315 LIST_INSERT_HEAD(head, elm, field); \ 316 } else { \ 317 while (LIST_NEXT(curelm, field)) \ 318 curelm = LIST_NEXT(curelm, field);\ 319 LIST_INSERT_AFTER(curelm, elm, field);\ 320 }\ 321 } while (0) 322 323 #define KEY_CHKSASTATE(head, sav) \ 324 /* do */ { \ 325 if ((head) != (sav)) { \ 326 IPSECLOG(LOG_DEBUG, \ 327 "state mismatched (TREE=%d SA=%d)\n", \ 328 (head), (sav)); \ 329 continue; \ 330 } \ 331 } /* while (0) */ 332 333 #define KEY_CHKSPDIR(head, sp) \ 334 do { \ 335 if ((head) != (sp)) { \ 336 IPSECLOG(LOG_DEBUG, \ 337 "direction mismatched (TREE=%d SP=%d), anyway continue.\n",\ 338 (head), (sp)); \ 339 } \ 340 } while (0) 341 342 /* 343 * set parameters into secasindex buffer. 344 * Must allocate secasindex buffer before calling this function. 345 */ 346 static int 347 key_setsecasidx(int, int, int, const struct sockaddr *, 348 const struct sockaddr *, struct secasindex *); 349 350 /* key statistics */ 351 struct _keystat { 352 u_long getspi_count; /* the avarage of count to try to get new SPI */ 353 } keystat; 354 355 struct sadb_msghdr { 356 struct sadb_msg *msg; 357 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 358 int extoff[SADB_EXT_MAX + 1]; 359 int extlen[SADB_EXT_MAX + 1]; 360 }; 361 362 static void 363 key_init_spidx_bymsghdr(struct secpolicyindex *, const struct sadb_msghdr *); 364 365 static const struct sockaddr * 366 key_msghdr_get_sockaddr(const struct sadb_msghdr *mhp, int idx) 367 { 368 369 return PFKEY_ADDR_SADDR((struct sadb_address *)mhp->ext[idx]); 370 } 371 372 static struct secasvar *key_allocsa_policy (const struct secasindex *); 373 #if 0 374 static void key_freeso(struct socket *); 375 static void key_freesp_so(struct secpolicy **); 376 #endif 377 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int); 378 static void key_delsp (struct secpolicy *); 379 static struct secpolicy *key_getsp (const struct secpolicyindex *); 380 static struct secpolicy *key_getspbyid (u_int32_t); 381 static u_int16_t key_newreqid (void); 382 static struct mbuf *key_gather_mbuf (struct mbuf *, 383 const struct sadb_msghdr *, int, int, ...); 384 static int key_spdadd (struct socket *, struct mbuf *, 385 const struct sadb_msghdr *); 386 static u_int32_t key_getnewspid (void); 387 static int key_spddelete (struct socket *, struct mbuf *, 388 const struct sadb_msghdr *); 389 static int key_spddelete2 (struct socket *, struct mbuf *, 390 const struct sadb_msghdr *); 391 static int key_spdget (struct socket *, struct mbuf *, 392 const struct sadb_msghdr *); 393 static int key_spdflush (struct socket *, struct mbuf *, 394 const struct sadb_msghdr *); 395 static int key_spddump (struct socket *, struct mbuf *, 396 const struct sadb_msghdr *); 397 static struct mbuf * key_setspddump (int *errorp, pid_t); 398 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 399 static int key_nat_map (struct socket *, struct mbuf *, 400 const struct sadb_msghdr *); 401 static struct mbuf *key_setdumpsp (struct secpolicy *, 402 u_int8_t, u_int32_t, pid_t); 403 static u_int key_getspreqmsglen (const struct secpolicy *); 404 static int key_spdexpire (struct secpolicy *); 405 static struct secashead *key_newsah (const struct secasindex *); 406 static void key_delsah (struct secashead *); 407 static struct secasvar *key_newsav (struct mbuf *, 408 const struct sadb_msghdr *, struct secashead *, int *, 409 const char*, int); 410 #define KEY_NEWSAV(m, sadb, sah, e) \ 411 key_newsav(m, sadb, sah, e, __func__, __LINE__) 412 static void key_delsav (struct secasvar *); 413 static struct secashead *key_getsah (const struct secasindex *); 414 static struct secasvar *key_checkspidup (const struct secasindex *, u_int32_t); 415 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 416 static int key_setsaval (struct secasvar *, struct mbuf *, 417 const struct sadb_msghdr *); 418 static void key_freesaval(struct secasvar *); 419 static int key_mature (struct secasvar *); 420 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 421 u_int8_t, u_int32_t, u_int32_t); 422 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 423 static struct mbuf *key_setsadbxtype (u_int16_t); 424 static struct mbuf *key_setsadbxfrag (u_int16_t); 425 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 426 static int key_checksalen (const union sockaddr_union *); 427 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 428 u_int32_t, pid_t, u_int16_t); 429 static struct mbuf *key_setsadbsa (struct secasvar *); 430 static struct mbuf *key_setsadbaddr (u_int16_t, 431 const struct sockaddr *, u_int8_t, u_int16_t); 432 #if 0 433 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 434 int, u_int64_t); 435 #endif 436 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 437 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 438 u_int32_t); 439 static void *key_newbuf (const void *, u_int); 440 #ifdef INET6 441 static int key_ismyaddr6 (const struct sockaddr_in6 *); 442 #endif 443 444 static void sysctl_net_keyv2_setup(struct sysctllog **); 445 static void sysctl_net_key_compat_setup(struct sysctllog **); 446 447 /* flags for key_saidx_match() */ 448 #define CMP_HEAD 1 /* protocol, addresses. */ 449 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 450 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 451 #define CMP_EXACTLY 4 /* all elements. */ 452 static int key_saidx_match(const struct secasindex *, 453 const struct secasindex *, int); 454 455 static int key_sockaddr_match(const struct sockaddr *, 456 const struct sockaddr *, int); 457 static int key_bb_match_withmask(const void *, const void *, u_int); 458 static u_int16_t key_satype2proto (u_int8_t); 459 static u_int8_t key_proto2satype (u_int16_t); 460 461 static int key_spidx_match_exactly(const struct secpolicyindex *, 462 const struct secpolicyindex *); 463 static int key_spidx_match_withmask(const struct secpolicyindex *, 464 const struct secpolicyindex *); 465 466 static int key_getspi (struct socket *, struct mbuf *, 467 const struct sadb_msghdr *); 468 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 469 const struct secasindex *); 470 static int key_handle_natt_info (struct secasvar *, 471 const struct sadb_msghdr *); 472 static int key_set_natt_ports (union sockaddr_union *, 473 union sockaddr_union *, 474 const struct sadb_msghdr *); 475 static int key_update (struct socket *, struct mbuf *, 476 const struct sadb_msghdr *); 477 #ifdef IPSEC_DOSEQCHECK 478 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 479 #endif 480 static int key_add (struct socket *, struct mbuf *, 481 const struct sadb_msghdr *); 482 static int key_setident (struct secashead *, struct mbuf *, 483 const struct sadb_msghdr *); 484 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 485 const struct sadb_msghdr *); 486 static int key_delete (struct socket *, struct mbuf *, 487 const struct sadb_msghdr *); 488 static int key_get (struct socket *, struct mbuf *, 489 const struct sadb_msghdr *); 490 491 static void key_getcomb_setlifetime (struct sadb_comb *); 492 static struct mbuf *key_getcomb_esp (void); 493 static struct mbuf *key_getcomb_ah (void); 494 static struct mbuf *key_getcomb_ipcomp (void); 495 static struct mbuf *key_getprop (const struct secasindex *); 496 497 static int key_acquire (const struct secasindex *, struct secpolicy *); 498 #ifndef IPSEC_NONBLOCK_ACQUIRE 499 static struct secacq *key_newacq (const struct secasindex *); 500 static struct secacq *key_getacq (const struct secasindex *); 501 static struct secacq *key_getacqbyseq (u_int32_t); 502 #endif 503 #ifdef notyet 504 static struct secspacq *key_newspacq (const struct secpolicyindex *); 505 static struct secspacq *key_getspacq (const struct secpolicyindex *); 506 #endif 507 static int key_acquire2 (struct socket *, struct mbuf *, 508 const struct sadb_msghdr *); 509 static int key_register (struct socket *, struct mbuf *, 510 const struct sadb_msghdr *); 511 static int key_expire (struct secasvar *); 512 static int key_flush (struct socket *, struct mbuf *, 513 const struct sadb_msghdr *); 514 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 515 int *lenp, pid_t pid); 516 static int key_dump (struct socket *, struct mbuf *, 517 const struct sadb_msghdr *); 518 static int key_promisc (struct socket *, struct mbuf *, 519 const struct sadb_msghdr *); 520 static int key_senderror (struct socket *, struct mbuf *, int); 521 static int key_validate_ext (const struct sadb_ext *, int); 522 static int key_align (struct mbuf *, struct sadb_msghdr *); 523 #if 0 524 static const char *key_getfqdn (void); 525 static const char *key_getuserfqdn (void); 526 #endif 527 static void key_sa_chgstate (struct secasvar *, u_int8_t); 528 static inline void key_sp_dead (struct secpolicy *); 529 static void key_sp_unlink (struct secpolicy *sp); 530 531 static struct mbuf *key_alloc_mbuf (int); 532 533 static void key_timehandler(void *); 534 static void key_timehandler_work(struct work *, void *); 535 static struct callout key_timehandler_ch; 536 static struct workqueue *key_timehandler_wq; 537 static struct work key_timehandler_wk; 538 539 #ifdef IPSEC_REF_DEBUG 540 #define REFLOG(label, p, where, tag) \ 541 log(LOG_DEBUG, "%s:%d: " label " : refcnt=%d (%p)\n.", \ 542 (where), (tag), (p)->refcnt, (p)) 543 #else 544 #define REFLOG(label, p, where, tag) do {} while (0) 545 #endif 546 547 #define SA_ADDREF(p) do { \ 548 atomic_inc_uint(&(p)->refcnt); \ 549 REFLOG("SA_ADDREF", (p), __func__, __LINE__); \ 550 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 551 } while (0) 552 #define SA_ADDREF2(p, where, tag) do { \ 553 atomic_inc_uint(&(p)->refcnt); \ 554 REFLOG("SA_ADDREF", (p), (where), (tag)); \ 555 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 556 } while (0) 557 #define SA_DELREF(p) do { \ 558 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 559 atomic_dec_uint(&(p)->refcnt); \ 560 REFLOG("SA_DELREF", (p), __func__, __LINE__); \ 561 } while (0) 562 #define SA_DELREF2(p, nv, where, tag) do { \ 563 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 564 nv = atomic_dec_uint_nv(&(p)->refcnt); \ 565 REFLOG("SA_DELREF", (p), (where), (tag)); \ 566 } while (0) 567 568 #define SP_ADDREF(p) do { \ 569 atomic_inc_uint(&(p)->refcnt); \ 570 REFLOG("SP_ADDREF", (p), __func__, __LINE__); \ 571 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 572 } while (0) 573 #define SP_ADDREF2(p, where, tag) do { \ 574 atomic_inc_uint(&(p)->refcnt); \ 575 REFLOG("SP_ADDREF", (p), (where), (tag)); \ 576 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 577 } while (0) 578 #define SP_DELREF(p) do { \ 579 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 580 atomic_dec_uint(&(p)->refcnt); \ 581 REFLOG("SP_DELREF", (p), __func__, __LINE__); \ 582 } while (0) 583 #define SP_DELREF2(p, nv, where, tag) do { \ 584 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 585 nv = atomic_dec_uint_nv(&(p)->refcnt); \ 586 REFLOG("SP_DELREF", (p), (where), (tag)); \ 587 } while (0) 588 589 590 static inline void 591 key_sp_dead(struct secpolicy *sp) 592 { 593 594 /* mark the SP dead */ 595 sp->state = IPSEC_SPSTATE_DEAD; 596 } 597 598 static void 599 key_sp_unlink(struct secpolicy *sp) 600 { 601 602 /* remove from SP index */ 603 KASSERT(__LIST_CHAINED(sp)); 604 LIST_REMOVE(sp, chain); 605 /* Release refcount held just for being on chain */ 606 KEY_FREESP(&sp); 607 } 608 609 610 /* 611 * Return 0 when there are known to be no SP's for the specified 612 * direction. Otherwise return 1. This is used by IPsec code 613 * to optimize performance. 614 */ 615 int 616 key_havesp(u_int dir) 617 { 618 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 619 !LIST_EMPTY(&sptree[dir]) : 1); 620 } 621 622 /* %%% IPsec policy management */ 623 /* 624 * allocating a SP for OUTBOUND or INBOUND packet. 625 * Must call key_freesp() later. 626 * OUT: NULL: not found 627 * others: found and return the pointer. 628 */ 629 struct secpolicy * 630 key_allocsp(const struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 631 { 632 struct secpolicy *sp; 633 int s; 634 635 KASSERT(spidx != NULL); 636 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 637 638 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 639 640 /* get a SP entry */ 641 s = splsoftnet(); /*called from softclock()*/ 642 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 643 printf("*** objects\n"); 644 kdebug_secpolicyindex(spidx); 645 } 646 647 LIST_FOREACH(sp, &sptree[dir], chain) { 648 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 649 printf("*** in SPD\n"); 650 kdebug_secpolicyindex(&sp->spidx); 651 } 652 653 if (sp->state == IPSEC_SPSTATE_DEAD) 654 continue; 655 if (key_spidx_match_withmask(&sp->spidx, spidx)) 656 goto found; 657 } 658 sp = NULL; 659 found: 660 if (sp) { 661 /* sanity check */ 662 KEY_CHKSPDIR(sp->spidx.dir, dir); 663 664 /* found a SPD entry */ 665 sp->lastused = time_uptime; 666 SP_ADDREF2(sp, where, tag); 667 } 668 splx(s); 669 670 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 671 "DP return SP:%p (ID=%u) refcnt %u\n", 672 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 673 return sp; 674 } 675 676 /* 677 * allocating a SP for OUTBOUND or INBOUND packet. 678 * Must call key_freesp() later. 679 * OUT: NULL: not found 680 * others: found and return the pointer. 681 */ 682 struct secpolicy * 683 key_allocsp2(u_int32_t spi, 684 const union sockaddr_union *dst, 685 u_int8_t proto, 686 u_int dir, 687 const char* where, int tag) 688 { 689 struct secpolicy *sp; 690 int s; 691 692 KASSERT(dst != NULL); 693 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 694 695 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 696 697 /* get a SP entry */ 698 s = splsoftnet(); /*called from softclock()*/ 699 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 700 printf("*** objects\n"); 701 printf("spi %u proto %u dir %u\n", spi, proto, dir); 702 kdebug_sockaddr(&dst->sa); 703 } 704 705 LIST_FOREACH(sp, &sptree[dir], chain) { 706 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 707 printf("*** in SPD\n"); 708 kdebug_secpolicyindex(&sp->spidx); 709 } 710 711 if (sp->state == IPSEC_SPSTATE_DEAD) 712 continue; 713 /* compare simple values, then dst address */ 714 if (sp->spidx.ul_proto != proto) 715 continue; 716 /* NB: spi's must exist and match */ 717 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 718 continue; 719 if (key_sockaddr_match(&sp->spidx.dst.sa, &dst->sa, PORT_STRICT)) 720 goto found; 721 } 722 sp = NULL; 723 found: 724 if (sp) { 725 /* sanity check */ 726 KEY_CHKSPDIR(sp->spidx.dir, dir); 727 728 /* found a SPD entry */ 729 sp->lastused = time_uptime; 730 SP_ADDREF2(sp, where, tag); 731 } 732 splx(s); 733 734 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 735 "DP return SP:%p (ID=%u) refcnt %u\n", 736 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 737 return sp; 738 } 739 740 /* 741 * return a policy that matches this particular inbound packet. 742 * XXX slow 743 */ 744 struct secpolicy * 745 key_gettunnel(const struct sockaddr *osrc, 746 const struct sockaddr *odst, 747 const struct sockaddr *isrc, 748 const struct sockaddr *idst, 749 const char* where, int tag) 750 { 751 struct secpolicy *sp; 752 const int dir = IPSEC_DIR_INBOUND; 753 int s; 754 struct ipsecrequest *r1, *r2, *p; 755 struct secpolicyindex spidx; 756 757 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 758 759 if (isrc->sa_family != idst->sa_family) { 760 IPSECLOG(LOG_ERR, "protocol family mismatched %d != %d\n.", 761 isrc->sa_family, idst->sa_family); 762 sp = NULL; 763 goto done; 764 } 765 766 s = splsoftnet(); /*called from softclock()*/ 767 LIST_FOREACH(sp, &sptree[dir], chain) { 768 if (sp->state == IPSEC_SPSTATE_DEAD) 769 continue; 770 771 r1 = r2 = NULL; 772 for (p = sp->req; p; p = p->next) { 773 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 774 continue; 775 776 r1 = r2; 777 r2 = p; 778 779 if (!r1) { 780 /* here we look at address matches only */ 781 spidx = sp->spidx; 782 if (isrc->sa_len > sizeof(spidx.src) || 783 idst->sa_len > sizeof(spidx.dst)) 784 continue; 785 memcpy(&spidx.src, isrc, isrc->sa_len); 786 memcpy(&spidx.dst, idst, idst->sa_len); 787 if (!key_spidx_match_withmask(&sp->spidx, &spidx)) 788 continue; 789 } else { 790 if (!key_sockaddr_match(&r1->saidx.src.sa, isrc, PORT_NONE) || 791 !key_sockaddr_match(&r1->saidx.dst.sa, idst, PORT_NONE)) 792 continue; 793 } 794 795 if (!key_sockaddr_match(&r2->saidx.src.sa, osrc, PORT_NONE) || 796 !key_sockaddr_match(&r2->saidx.dst.sa, odst, PORT_NONE)) 797 continue; 798 799 goto found; 800 } 801 } 802 sp = NULL; 803 found: 804 if (sp) { 805 sp->lastused = time_uptime; 806 SP_ADDREF2(sp, where, tag); 807 } 808 splx(s); 809 done: 810 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 811 "DP return SP:%p (ID=%u) refcnt %u\n", 812 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 813 return sp; 814 } 815 816 /* 817 * allocating an SA entry for an *OUTBOUND* packet. 818 * checking each request entries in SP, and acquire an SA if need. 819 * OUT: 0: there are valid requests. 820 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 821 */ 822 int 823 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 824 { 825 u_int level; 826 int error; 827 struct secasvar *oldsav = NULL; 828 829 KASSERT(isr != NULL); 830 KASSERT(saidx != NULL); 831 KASSERTMSG(saidx->mode == IPSEC_MODE_TRANSPORT || 832 saidx->mode == IPSEC_MODE_TUNNEL, 833 "unexpected policy %u", saidx->mode); 834 835 /* get current level */ 836 level = ipsec_get_reqlevel(isr); 837 838 /* 839 * XXX guard against protocol callbacks from the crypto 840 * thread as they reference ipsecrequest.sav which we 841 * temporarily null out below. Need to rethink how we 842 * handle bundled SA's in the callback thread. 843 */ 844 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 845 #if 0 846 /* 847 * We do allocate new SA only if the state of SA in the holder is 848 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 849 */ 850 if (isr->sav != NULL) { 851 if (isr->sav->sah == NULL) 852 panic("key_checkrequest: sah is null"); 853 if (isr->sav == (struct secasvar *)LIST_FIRST( 854 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 855 KEY_FREESAV(&isr->sav); 856 isr->sav = NULL; 857 } 858 } 859 #else 860 /* 861 * we free any SA stashed in the IPsec request because a different 862 * SA may be involved each time this request is checked, either 863 * because new SAs are being configured, or this request is 864 * associated with an unconnected datagram socket, or this request 865 * is associated with a system default policy. 866 * 867 * The operation may have negative impact to performance. We may 868 * want to check cached SA carefully, rather than picking new SA 869 * every time. 870 */ 871 if (isr->sav != NULL) 872 oldsav = isr->sav; 873 #endif 874 875 /* 876 * new SA allocation if no SA found. 877 * key_allocsa_policy should allocate the oldest SA available. 878 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 879 */ 880 isr->sav = key_allocsa_policy(saidx); 881 membar_producer(); 882 if (oldsav != NULL) 883 KEY_FREESAV(&oldsav); 884 885 /* When there is SA. */ 886 if (isr->sav != NULL) { 887 if (isr->sav->state != SADB_SASTATE_MATURE && 888 isr->sav->state != SADB_SASTATE_DYING) 889 return EINVAL; 890 return 0; 891 } 892 893 /* there is no SA */ 894 error = key_acquire(saidx, isr->sp); 895 if (error != 0) { 896 /* XXX What should I do ? */ 897 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 898 error); 899 return error; 900 } 901 902 if (level != IPSEC_LEVEL_REQUIRE) { 903 /* XXX sigh, the interface to this routine is botched */ 904 KASSERTMSG(isr->sav == NULL, "unexpected SA"); 905 return 0; 906 } else { 907 return ENOENT; 908 } 909 } 910 911 /* 912 * allocating a SA for policy entry from SAD. 913 * NOTE: searching SAD of aliving state. 914 * OUT: NULL: not found. 915 * others: found and return the pointer. 916 */ 917 static struct secasvar * 918 key_allocsa_policy(const struct secasindex *saidx) 919 { 920 struct secashead *sah; 921 struct secasvar *sav; 922 u_int stateidx, state; 923 const u_int *saorder_state_valid; 924 int arraysize; 925 926 LIST_FOREACH(sah, &sahtree, chain) { 927 if (sah->state == SADB_SASTATE_DEAD) 928 continue; 929 if (key_saidx_match(&sah->saidx, saidx, CMP_MODE_REQID)) 930 goto found; 931 } 932 933 return NULL; 934 935 found: 936 937 /* 938 * search a valid state list for outbound packet. 939 * This search order is important. 940 */ 941 if (key_prefered_oldsa) { 942 saorder_state_valid = saorder_state_valid_prefer_old; 943 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 944 } else { 945 saorder_state_valid = saorder_state_valid_prefer_new; 946 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 947 } 948 949 /* search valid state */ 950 for (stateidx = 0; 951 stateidx < arraysize; 952 stateidx++) { 953 954 state = saorder_state_valid[stateidx]; 955 956 sav = key_do_allocsa_policy(sah, state); 957 if (sav != NULL) 958 return sav; 959 } 960 961 return NULL; 962 } 963 964 /* 965 * searching SAD with direction, protocol, mode and state. 966 * called by key_allocsa_policy(). 967 * OUT: 968 * NULL : not found 969 * others : found, pointer to a SA. 970 */ 971 static struct secasvar * 972 key_do_allocsa_policy(struct secashead *sah, u_int state) 973 { 974 struct secasvar *sav, *candidate, *d; 975 976 /* initilize */ 977 candidate = NULL; 978 979 LIST_FOREACH(sav, &sah->savtree[state], chain) { 980 /* sanity check */ 981 KEY_CHKSASTATE(sav->state, state); 982 983 /* initialize */ 984 if (candidate == NULL) { 985 candidate = sav; 986 continue; 987 } 988 989 /* Which SA is the better ? */ 990 991 /* sanity check 2 */ 992 KASSERT(candidate->lft_c != NULL); 993 KASSERT(sav->lft_c != NULL); 994 995 /* What the best method is to compare ? */ 996 if (key_prefered_oldsa) { 997 if (candidate->lft_c->sadb_lifetime_addtime > 998 sav->lft_c->sadb_lifetime_addtime) { 999 candidate = sav; 1000 } 1001 continue; 1002 /*NOTREACHED*/ 1003 } 1004 1005 /* prefered new sa rather than old sa */ 1006 if (candidate->lft_c->sadb_lifetime_addtime < 1007 sav->lft_c->sadb_lifetime_addtime) { 1008 d = candidate; 1009 candidate = sav; 1010 } else 1011 d = sav; 1012 1013 /* 1014 * prepared to delete the SA when there is more 1015 * suitable candidate and the lifetime of the SA is not 1016 * permanent. 1017 */ 1018 if (d->lft_c->sadb_lifetime_addtime != 0) { 1019 struct mbuf *m, *result = 0; 1020 uint8_t satype; 1021 1022 key_sa_chgstate(d, SADB_SASTATE_DEAD); 1023 1024 KASSERT(d->refcnt > 0); 1025 1026 satype = key_proto2satype(d->sah->saidx.proto); 1027 if (satype == 0) 1028 goto msgfail; 1029 1030 m = key_setsadbmsg(SADB_DELETE, 0, 1031 satype, 0, 0, d->refcnt - 1); 1032 if (!m) 1033 goto msgfail; 1034 result = m; 1035 1036 /* set sadb_address for saidx's. */ 1037 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1038 &d->sah->saidx.src.sa, 1039 d->sah->saidx.src.sa.sa_len << 3, 1040 IPSEC_ULPROTO_ANY); 1041 if (!m) 1042 goto msgfail; 1043 m_cat(result, m); 1044 1045 /* set sadb_address for saidx's. */ 1046 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1047 &d->sah->saidx.src.sa, 1048 d->sah->saidx.src.sa.sa_len << 3, 1049 IPSEC_ULPROTO_ANY); 1050 if (!m) 1051 goto msgfail; 1052 m_cat(result, m); 1053 1054 /* create SA extension */ 1055 m = key_setsadbsa(d); 1056 if (!m) 1057 goto msgfail; 1058 m_cat(result, m); 1059 1060 if (result->m_len < sizeof(struct sadb_msg)) { 1061 result = m_pullup(result, 1062 sizeof(struct sadb_msg)); 1063 if (result == NULL) 1064 goto msgfail; 1065 } 1066 1067 result->m_pkthdr.len = 0; 1068 for (m = result; m; m = m->m_next) 1069 result->m_pkthdr.len += m->m_len; 1070 mtod(result, struct sadb_msg *)->sadb_msg_len = 1071 PFKEY_UNIT64(result->m_pkthdr.len); 1072 1073 key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 1074 result = 0; 1075 msgfail: 1076 if (result) 1077 m_freem(result); 1078 KEY_FREESAV(&d); 1079 } 1080 } 1081 1082 if (candidate) { 1083 SA_ADDREF(candidate); 1084 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1085 "DP cause refcnt++:%d SA:%p\n", 1086 candidate->refcnt, candidate); 1087 } 1088 return candidate; 1089 } 1090 1091 /* 1092 * allocating a usable SA entry for a *INBOUND* packet. 1093 * Must call key_freesav() later. 1094 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1095 * NULL: not found, or error occurred. 1096 * 1097 * In the comparison, no source address is used--for RFC2401 conformance. 1098 * To quote, from section 4.1: 1099 * A security association is uniquely identified by a triple consisting 1100 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1101 * security protocol (AH or ESP) identifier. 1102 * Note that, however, we do need to keep source address in IPsec SA. 1103 * IKE specification and PF_KEY specification do assume that we 1104 * keep source address in IPsec SA. We see a tricky situation here. 1105 * 1106 * sport and dport are used for NAT-T. network order is always used. 1107 */ 1108 struct secasvar * 1109 key_allocsa( 1110 const union sockaddr_union *dst, 1111 u_int proto, 1112 u_int32_t spi, 1113 u_int16_t sport, 1114 u_int16_t dport, 1115 const char* where, int tag) 1116 { 1117 struct secashead *sah; 1118 struct secasvar *sav; 1119 u_int stateidx, state; 1120 const u_int *saorder_state_valid; 1121 int arraysize, chkport; 1122 int s; 1123 1124 int must_check_spi = 1; 1125 int must_check_alg = 0; 1126 u_int16_t cpi = 0; 1127 u_int8_t algo = 0; 1128 1129 if ((sport != 0) && (dport != 0)) 1130 chkport = PORT_STRICT; 1131 else 1132 chkport = PORT_NONE; 1133 1134 KASSERT(dst != NULL); 1135 1136 /* 1137 * XXX IPCOMP case 1138 * We use cpi to define spi here. In the case where cpi <= 1139 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1140 * the real spi. In this case, don't check the spi but check the 1141 * algorithm 1142 */ 1143 1144 if (proto == IPPROTO_IPCOMP) { 1145 u_int32_t tmp; 1146 tmp = ntohl(spi); 1147 cpi = (u_int16_t) tmp; 1148 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1149 algo = (u_int8_t) cpi; 1150 must_check_spi = 0; 1151 must_check_alg = 1; 1152 } 1153 } 1154 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1155 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1156 where, tag, must_check_spi, must_check_alg); 1157 1158 1159 /* 1160 * searching SAD. 1161 * XXX: to be checked internal IP header somewhere. Also when 1162 * IPsec tunnel packet is received. But ESP tunnel mode is 1163 * encrypted so we can't check internal IP header. 1164 */ 1165 s = splsoftnet(); /*called from softclock()*/ 1166 if (key_prefered_oldsa) { 1167 saorder_state_valid = saorder_state_valid_prefer_old; 1168 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1169 } else { 1170 saorder_state_valid = saorder_state_valid_prefer_new; 1171 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1172 } 1173 LIST_FOREACH(sah, &sahtree, chain) { 1174 /* search valid state */ 1175 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1176 state = saorder_state_valid[stateidx]; 1177 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1178 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1179 "try match spi %#x, %#x\n", 1180 ntohl(spi), ntohl(sav->spi)); 1181 /* sanity check */ 1182 KEY_CHKSASTATE(sav->state, state); 1183 /* do not return entries w/ unusable state */ 1184 if (sav->state != SADB_SASTATE_MATURE && 1185 sav->state != SADB_SASTATE_DYING) { 1186 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1187 "bad state %d\n", sav->state); 1188 continue; 1189 } 1190 if (proto != sav->sah->saidx.proto) { 1191 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1192 "proto fail %d != %d\n", 1193 proto, sav->sah->saidx.proto); 1194 continue; 1195 } 1196 if (must_check_spi && spi != sav->spi) { 1197 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1198 "spi fail %#x != %#x\n", 1199 ntohl(spi), ntohl(sav->spi)); 1200 continue; 1201 } 1202 /* XXX only on the ipcomp case */ 1203 if (must_check_alg && algo != sav->alg_comp) { 1204 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1205 "algo fail %d != %d\n", 1206 algo, sav->alg_comp); 1207 continue; 1208 } 1209 1210 #if 0 /* don't check src */ 1211 /* Fix port in src->sa */ 1212 1213 /* check src address */ 1214 if (!key_sockaddr_match(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE)) 1215 continue; 1216 #endif 1217 /* fix port of dst address XXX*/ 1218 key_porttosaddr(__UNCONST(dst), dport); 1219 /* check dst address */ 1220 if (!key_sockaddr_match(&dst->sa, &sav->sah->saidx.dst.sa, chkport)) 1221 continue; 1222 SA_ADDREF2(sav, where, tag); 1223 goto done; 1224 } 1225 } 1226 } 1227 sav = NULL; 1228 done: 1229 splx(s); 1230 1231 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1232 "DP return SA:%p; refcnt %u\n", sav, sav ? sav->refcnt : 0); 1233 return sav; 1234 } 1235 1236 void 1237 key_sp_ref(struct secpolicy *sp, const char* where, int tag) 1238 { 1239 1240 SP_ADDREF2(sp, where, tag); 1241 1242 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1243 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1244 sp, sp->id, where, tag, sp->refcnt); 1245 } 1246 1247 /* 1248 * Must be called after calling key_allocsp(). 1249 * For both the packet without socket and key_freeso(). 1250 */ 1251 void 1252 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1253 { 1254 struct secpolicy *sp = *spp; 1255 unsigned int nv; 1256 1257 KASSERT(sp != NULL); 1258 1259 SP_DELREF2(sp, nv, where, tag); 1260 1261 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1262 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1263 sp, sp->id, where, tag, nv); 1264 1265 if (nv == 0) { 1266 *spp = NULL; 1267 key_delsp(sp); 1268 } 1269 } 1270 1271 #if 0 1272 /* 1273 * Must be called after calling key_allocsp(). 1274 * For the packet with socket. 1275 */ 1276 static void 1277 key_freeso(struct socket *so) 1278 { 1279 /* sanity check */ 1280 KASSERT(so != NULL); 1281 1282 switch (so->so_proto->pr_domain->dom_family) { 1283 #ifdef INET 1284 case PF_INET: 1285 { 1286 struct inpcb *pcb = sotoinpcb(so); 1287 1288 /* Does it have a PCB ? */ 1289 if (pcb == NULL) 1290 return; 1291 1292 struct inpcbpolicy *sp = pcb->inp_sp; 1293 key_freesp_so(&sp->sp_in); 1294 key_freesp_so(&sp->sp_out); 1295 } 1296 break; 1297 #endif 1298 #ifdef INET6 1299 case PF_INET6: 1300 { 1301 #ifdef HAVE_NRL_INPCB 1302 struct inpcb *pcb = sotoinpcb(so); 1303 struct inpcbpolicy *sp = pcb->inp_sp; 1304 1305 /* Does it have a PCB ? */ 1306 if (pcb == NULL) 1307 return; 1308 key_freesp_so(&sp->sp_in); 1309 key_freesp_so(&sp->sp_out); 1310 #else 1311 struct in6pcb *pcb = sotoin6pcb(so); 1312 1313 /* Does it have a PCB ? */ 1314 if (pcb == NULL) 1315 return; 1316 key_freesp_so(&pcb->in6p_sp->sp_in); 1317 key_freesp_so(&pcb->in6p_sp->sp_out); 1318 #endif 1319 } 1320 break; 1321 #endif /* INET6 */ 1322 default: 1323 IPSECLOG(LOG_DEBUG, "unknown address family=%d.\n", 1324 so->so_proto->pr_domain->dom_family); 1325 return; 1326 } 1327 } 1328 1329 static void 1330 key_freesp_so(struct secpolicy **sp) 1331 { 1332 1333 KASSERT(sp != NULL); 1334 KASSERT(*sp != NULL); 1335 1336 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1337 (*sp)->policy == IPSEC_POLICY_BYPASS) 1338 return; 1339 1340 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1341 "invalid policy %u", (*sp)->policy); 1342 KEY_FREESP(sp); 1343 } 1344 #endif 1345 1346 /* 1347 * Must be called after calling key_allocsa(). 1348 * This function is called by key_freesp() to free some SA allocated 1349 * for a policy. 1350 */ 1351 void 1352 key_freesav(struct secasvar **psav, const char* where, int tag) 1353 { 1354 struct secasvar *sav = *psav; 1355 unsigned int nv; 1356 1357 KASSERT(sav != NULL); 1358 1359 SA_DELREF2(sav, nv, where, tag); 1360 1361 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1362 "DP SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1363 sav, (u_long)ntohl(sav->spi), where, tag, nv); 1364 1365 if (nv == 0) { 1366 *psav = NULL; 1367 key_delsav(sav); 1368 } 1369 } 1370 1371 /* %%% SPD management */ 1372 /* 1373 * free security policy entry. 1374 */ 1375 static void 1376 key_delsp(struct secpolicy *sp) 1377 { 1378 int s; 1379 1380 KASSERT(sp != NULL); 1381 1382 key_sp_dead(sp); 1383 1384 KASSERTMSG(sp->refcnt == 0, 1385 "SP with references deleted (refcnt %u)", sp->refcnt); 1386 1387 s = splsoftnet(); /*called from softclock()*/ 1388 1389 { 1390 struct ipsecrequest *isr = sp->req, *nextisr; 1391 1392 while (isr != NULL) { 1393 if (isr->sav != NULL) { 1394 KEY_FREESAV(&isr->sav); 1395 isr->sav = NULL; 1396 } 1397 1398 nextisr = isr->next; 1399 kmem_intr_free(isr, sizeof(*isr)); 1400 isr = nextisr; 1401 } 1402 } 1403 1404 kmem_intr_free(sp, sizeof(*sp)); 1405 1406 splx(s); 1407 } 1408 1409 /* 1410 * search SPD 1411 * OUT: NULL : not found 1412 * others : found, pointer to a SP. 1413 */ 1414 static struct secpolicy * 1415 key_getsp(const struct secpolicyindex *spidx) 1416 { 1417 struct secpolicy *sp; 1418 1419 KASSERT(spidx != NULL); 1420 1421 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1422 if (sp->state == IPSEC_SPSTATE_DEAD) 1423 continue; 1424 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1425 SP_ADDREF(sp); 1426 return sp; 1427 } 1428 } 1429 1430 return NULL; 1431 } 1432 1433 /* 1434 * get SP by index. 1435 * OUT: NULL : not found 1436 * others : found, pointer to a SP. 1437 */ 1438 static struct secpolicy * 1439 key_getspbyid(u_int32_t id) 1440 { 1441 struct secpolicy *sp; 1442 1443 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1444 if (sp->state == IPSEC_SPSTATE_DEAD) 1445 continue; 1446 if (sp->id == id) { 1447 SP_ADDREF(sp); 1448 return sp; 1449 } 1450 } 1451 1452 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1453 if (sp->state == IPSEC_SPSTATE_DEAD) 1454 continue; 1455 if (sp->id == id) { 1456 SP_ADDREF(sp); 1457 return sp; 1458 } 1459 } 1460 1461 return NULL; 1462 } 1463 1464 struct secpolicy * 1465 key_newsp(const char* where, int tag) 1466 { 1467 struct secpolicy *newsp = NULL; 1468 1469 newsp = kmem_intr_zalloc(sizeof(struct secpolicy), KM_NOSLEEP); 1470 if (newsp != NULL) 1471 newsp->refcnt = 1; 1472 1473 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1474 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1475 return newsp; 1476 } 1477 1478 /* 1479 * create secpolicy structure from sadb_x_policy structure. 1480 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1481 * so must be set properly later. 1482 */ 1483 struct secpolicy * 1484 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1485 { 1486 struct secpolicy *newsp; 1487 1488 KASSERT(!cpu_softintr_p()); 1489 KASSERT(xpl0 != NULL); 1490 KASSERT(len >= sizeof(*xpl0)); 1491 1492 if (len != PFKEY_EXTLEN(xpl0)) { 1493 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1494 *error = EINVAL; 1495 return NULL; 1496 } 1497 1498 newsp = KEY_NEWSP(); 1499 if (newsp == NULL) { 1500 *error = ENOBUFS; 1501 return NULL; 1502 } 1503 1504 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1505 newsp->policy = xpl0->sadb_x_policy_type; 1506 1507 /* check policy */ 1508 switch (xpl0->sadb_x_policy_type) { 1509 case IPSEC_POLICY_DISCARD: 1510 case IPSEC_POLICY_NONE: 1511 case IPSEC_POLICY_ENTRUST: 1512 case IPSEC_POLICY_BYPASS: 1513 newsp->req = NULL; 1514 *error = 0; 1515 return newsp; 1516 1517 case IPSEC_POLICY_IPSEC: 1518 /* Continued */ 1519 break; 1520 default: 1521 IPSECLOG(LOG_DEBUG, "invalid policy type.\n"); 1522 KEY_FREESP(&newsp); 1523 *error = EINVAL; 1524 return NULL; 1525 } 1526 1527 /* IPSEC_POLICY_IPSEC */ 1528 { 1529 int tlen; 1530 const struct sadb_x_ipsecrequest *xisr; 1531 uint16_t xisr_reqid; 1532 struct ipsecrequest **p_isr = &newsp->req; 1533 1534 /* validity check */ 1535 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1536 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1537 *error = EINVAL; 1538 goto free_exit; 1539 } 1540 1541 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1542 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1543 1544 while (tlen > 0) { 1545 /* length check */ 1546 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1547 IPSECLOG(LOG_DEBUG, "invalid ipsecrequest length.\n"); 1548 *error = EINVAL; 1549 goto free_exit; 1550 } 1551 1552 /* allocate request buffer */ 1553 *p_isr = kmem_zalloc(sizeof(**p_isr), KM_SLEEP); 1554 1555 /* set values */ 1556 (*p_isr)->next = NULL; 1557 1558 switch (xisr->sadb_x_ipsecrequest_proto) { 1559 case IPPROTO_ESP: 1560 case IPPROTO_AH: 1561 case IPPROTO_IPCOMP: 1562 break; 1563 default: 1564 IPSECLOG(LOG_DEBUG, "invalid proto type=%u\n", 1565 xisr->sadb_x_ipsecrequest_proto); 1566 *error = EPROTONOSUPPORT; 1567 goto free_exit; 1568 } 1569 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1570 1571 switch (xisr->sadb_x_ipsecrequest_mode) { 1572 case IPSEC_MODE_TRANSPORT: 1573 case IPSEC_MODE_TUNNEL: 1574 break; 1575 case IPSEC_MODE_ANY: 1576 default: 1577 IPSECLOG(LOG_DEBUG, "invalid mode=%u\n", 1578 xisr->sadb_x_ipsecrequest_mode); 1579 *error = EINVAL; 1580 goto free_exit; 1581 } 1582 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1583 1584 switch (xisr->sadb_x_ipsecrequest_level) { 1585 case IPSEC_LEVEL_DEFAULT: 1586 case IPSEC_LEVEL_USE: 1587 case IPSEC_LEVEL_REQUIRE: 1588 break; 1589 case IPSEC_LEVEL_UNIQUE: 1590 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1591 /* validity check */ 1592 /* 1593 * If range violation of reqid, kernel will 1594 * update it, don't refuse it. 1595 */ 1596 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1597 IPSECLOG(LOG_DEBUG, 1598 "reqid=%d range " 1599 "violation, updated by kernel.\n", 1600 xisr_reqid); 1601 xisr_reqid = 0; 1602 } 1603 1604 /* allocate new reqid id if reqid is zero. */ 1605 if (xisr_reqid == 0) { 1606 u_int16_t reqid = key_newreqid(); 1607 if (reqid == 0) { 1608 *error = ENOBUFS; 1609 goto free_exit; 1610 } 1611 (*p_isr)->saidx.reqid = reqid; 1612 } else { 1613 /* set it for manual keying. */ 1614 (*p_isr)->saidx.reqid = xisr_reqid; 1615 } 1616 break; 1617 1618 default: 1619 IPSECLOG(LOG_DEBUG, "invalid level=%u\n", 1620 xisr->sadb_x_ipsecrequest_level); 1621 *error = EINVAL; 1622 goto free_exit; 1623 } 1624 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1625 1626 /* set IP addresses if there */ 1627 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1628 const struct sockaddr *paddr; 1629 1630 paddr = (const struct sockaddr *)(xisr + 1); 1631 1632 /* validity check */ 1633 if (paddr->sa_len > sizeof((*p_isr)->saidx.src)) { 1634 IPSECLOG(LOG_DEBUG, "invalid request " 1635 "address length.\n"); 1636 *error = EINVAL; 1637 goto free_exit; 1638 } 1639 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1640 1641 paddr = (const struct sockaddr *)((const char *)paddr 1642 + paddr->sa_len); 1643 1644 /* validity check */ 1645 if (paddr->sa_len > sizeof((*p_isr)->saidx.dst)) { 1646 IPSECLOG(LOG_DEBUG, "invalid request " 1647 "address length.\n"); 1648 *error = EINVAL; 1649 goto free_exit; 1650 } 1651 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1652 } 1653 1654 (*p_isr)->sav = NULL; 1655 (*p_isr)->sp = newsp; 1656 1657 /* initialization for the next. */ 1658 p_isr = &(*p_isr)->next; 1659 tlen -= xisr->sadb_x_ipsecrequest_len; 1660 1661 /* validity check */ 1662 if (tlen < 0) { 1663 IPSECLOG(LOG_DEBUG, "becoming tlen < 0.\n"); 1664 *error = EINVAL; 1665 goto free_exit; 1666 } 1667 1668 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr + 1669 xisr->sadb_x_ipsecrequest_len); 1670 } 1671 } 1672 1673 *error = 0; 1674 return newsp; 1675 1676 free_exit: 1677 KEY_FREESP(&newsp); 1678 return NULL; 1679 } 1680 1681 static u_int16_t 1682 key_newreqid(void) 1683 { 1684 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1685 1686 auto_reqid = (auto_reqid == 0xffff ? 1687 IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1688 1689 /* XXX should be unique check */ 1690 1691 return auto_reqid; 1692 } 1693 1694 /* 1695 * copy secpolicy struct to sadb_x_policy structure indicated. 1696 */ 1697 struct mbuf * 1698 key_sp2msg(const struct secpolicy *sp) 1699 { 1700 struct sadb_x_policy *xpl; 1701 int tlen; 1702 char *p; 1703 struct mbuf *m; 1704 1705 KASSERT(sp != NULL); 1706 1707 tlen = key_getspreqmsglen(sp); 1708 1709 m = key_alloc_mbuf(tlen); 1710 if (!m || m->m_next) { /*XXX*/ 1711 if (m) 1712 m_freem(m); 1713 return NULL; 1714 } 1715 1716 m->m_len = tlen; 1717 m->m_next = NULL; 1718 xpl = mtod(m, struct sadb_x_policy *); 1719 memset(xpl, 0, tlen); 1720 1721 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1722 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1723 xpl->sadb_x_policy_type = sp->policy; 1724 xpl->sadb_x_policy_dir = sp->spidx.dir; 1725 xpl->sadb_x_policy_id = sp->id; 1726 p = (char *)xpl + sizeof(*xpl); 1727 1728 /* if is the policy for ipsec ? */ 1729 if (sp->policy == IPSEC_POLICY_IPSEC) { 1730 struct sadb_x_ipsecrequest *xisr; 1731 struct ipsecrequest *isr; 1732 1733 for (isr = sp->req; isr != NULL; isr = isr->next) { 1734 1735 xisr = (struct sadb_x_ipsecrequest *)p; 1736 1737 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1738 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1739 xisr->sadb_x_ipsecrequest_level = isr->level; 1740 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1741 1742 p += sizeof(*xisr); 1743 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1744 p += isr->saidx.src.sa.sa_len; 1745 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1746 p += isr->saidx.src.sa.sa_len; 1747 1748 xisr->sadb_x_ipsecrequest_len = 1749 PFKEY_ALIGN8(sizeof(*xisr) 1750 + isr->saidx.src.sa.sa_len 1751 + isr->saidx.dst.sa.sa_len); 1752 } 1753 } 1754 1755 return m; 1756 } 1757 1758 /* m will not be freed nor modified */ 1759 static struct mbuf * 1760 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1761 int ndeep, int nitem, ...) 1762 { 1763 va_list ap; 1764 int idx; 1765 int i; 1766 struct mbuf *result = NULL, *n; 1767 int len; 1768 1769 KASSERT(m != NULL); 1770 KASSERT(mhp != NULL); 1771 1772 va_start(ap, nitem); 1773 for (i = 0; i < nitem; i++) { 1774 idx = va_arg(ap, int); 1775 if (idx < 0 || idx > SADB_EXT_MAX) 1776 goto fail; 1777 /* don't attempt to pull empty extension */ 1778 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1779 continue; 1780 if (idx != SADB_EXT_RESERVED && 1781 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1782 continue; 1783 1784 if (idx == SADB_EXT_RESERVED) { 1785 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 1786 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1787 MGETHDR(n, M_DONTWAIT, MT_DATA); 1788 if (!n) 1789 goto fail; 1790 n->m_len = len; 1791 n->m_next = NULL; 1792 m_copydata(m, 0, sizeof(struct sadb_msg), 1793 mtod(n, void *)); 1794 } else if (i < ndeep) { 1795 len = mhp->extlen[idx]; 1796 n = key_alloc_mbuf(len); 1797 if (!n || n->m_next) { /*XXX*/ 1798 if (n) 1799 m_freem(n); 1800 goto fail; 1801 } 1802 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1803 mtod(n, void *)); 1804 } else { 1805 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1806 M_DONTWAIT); 1807 } 1808 if (n == NULL) 1809 goto fail; 1810 1811 if (result) 1812 m_cat(result, n); 1813 else 1814 result = n; 1815 } 1816 va_end(ap); 1817 1818 if (result && (result->m_flags & M_PKTHDR) != 0) { 1819 result->m_pkthdr.len = 0; 1820 for (n = result; n; n = n->m_next) 1821 result->m_pkthdr.len += n->m_len; 1822 } 1823 1824 return result; 1825 1826 fail: 1827 va_end(ap); 1828 m_freem(result); 1829 return NULL; 1830 } 1831 1832 /* 1833 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1834 * add an entry to SP database, when received 1835 * <base, address(SD), (lifetime(H),) policy> 1836 * from the user(?). 1837 * Adding to SP database, 1838 * and send 1839 * <base, address(SD), (lifetime(H),) policy> 1840 * to the socket which was send. 1841 * 1842 * SPDADD set a unique policy entry. 1843 * SPDSETIDX like SPDADD without a part of policy requests. 1844 * SPDUPDATE replace a unique policy entry. 1845 * 1846 * m will always be freed. 1847 */ 1848 static int 1849 key_spdadd(struct socket *so, struct mbuf *m, 1850 const struct sadb_msghdr *mhp) 1851 { 1852 const struct sockaddr *src, *dst; 1853 const struct sadb_x_policy *xpl0; 1854 struct sadb_x_policy *xpl; 1855 const struct sadb_lifetime *lft = NULL; 1856 struct secpolicyindex spidx; 1857 struct secpolicy *newsp; 1858 int error; 1859 1860 KASSERT(!cpu_softintr_p()); 1861 KASSERT(so != NULL); 1862 KASSERT(m != NULL); 1863 KASSERT(mhp != NULL); 1864 KASSERT(mhp->msg != NULL); 1865 1866 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1867 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1868 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1869 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1870 return key_senderror(so, m, EINVAL); 1871 } 1872 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1873 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1874 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1875 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1876 return key_senderror(so, m, EINVAL); 1877 } 1878 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1879 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < 1880 sizeof(struct sadb_lifetime)) { 1881 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1882 return key_senderror(so, m, EINVAL); 1883 } 1884 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1885 } 1886 1887 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1888 1889 /* checking the direciton. */ 1890 switch (xpl0->sadb_x_policy_dir) { 1891 case IPSEC_DIR_INBOUND: 1892 case IPSEC_DIR_OUTBOUND: 1893 break; 1894 default: 1895 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 1896 return key_senderror(so, m, EINVAL); 1897 } 1898 1899 /* check policy */ 1900 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1901 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST || 1902 xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1903 IPSECLOG(LOG_DEBUG, "Invalid policy type.\n"); 1904 return key_senderror(so, m, EINVAL); 1905 } 1906 1907 /* policy requests are mandatory when action is ipsec. */ 1908 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && 1909 xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 1910 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1911 IPSECLOG(LOG_DEBUG, "some policy requests part required.\n"); 1912 return key_senderror(so, m, EINVAL); 1913 } 1914 1915 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 1916 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 1917 1918 /* sanity check on addr pair */ 1919 if (src->sa_family != dst->sa_family) 1920 return key_senderror(so, m, EINVAL); 1921 if (src->sa_len != dst->sa_len) 1922 return key_senderror(so, m, EINVAL); 1923 1924 key_init_spidx_bymsghdr(&spidx, mhp); 1925 1926 /* 1927 * checking there is SP already or not. 1928 * SPDUPDATE doesn't depend on whether there is a SP or not. 1929 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1930 * then error. 1931 */ 1932 newsp = key_getsp(&spidx); 1933 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1934 if (newsp) { 1935 key_sp_dead(newsp); 1936 key_sp_unlink(newsp); /* XXX jrs ordering */ 1937 KEY_FREESP(&newsp); 1938 newsp = NULL; 1939 } 1940 } else { 1941 if (newsp != NULL) { 1942 KEY_FREESP(&newsp); 1943 IPSECLOG(LOG_DEBUG, "a SP entry exists already.\n"); 1944 return key_senderror(so, m, EEXIST); 1945 } 1946 } 1947 1948 /* allocation new SP entry */ 1949 newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error); 1950 if (newsp == NULL) { 1951 return key_senderror(so, m, error); 1952 } 1953 1954 newsp->id = key_getnewspid(); 1955 if (newsp->id == 0) { 1956 kmem_free(newsp, sizeof(*newsp)); 1957 return key_senderror(so, m, ENOBUFS); 1958 } 1959 1960 newsp->spidx = spidx; 1961 newsp->created = time_uptime; 1962 newsp->lastused = newsp->created; 1963 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1964 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1965 1966 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1967 newsp->state = IPSEC_SPSTATE_ALIVE; 1968 if (newsp->policy == IPSEC_POLICY_IPSEC) 1969 KASSERT(newsp->req != NULL); 1970 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1971 1972 #ifdef notyet 1973 /* delete the entry in spacqtree */ 1974 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1975 struct secspacq *spacq = key_getspacq(&spidx); 1976 if (spacq != NULL) { 1977 /* reset counter in order to deletion by timehandler. */ 1978 spacq->created = time_uptime; 1979 spacq->count = 0; 1980 } 1981 } 1982 #endif 1983 1984 /* Invalidate all cached SPD pointers in the PCBs. */ 1985 ipsec_invalpcbcacheall(); 1986 1987 #if defined(GATEWAY) 1988 /* Invalidate the ipflow cache, as well. */ 1989 ipflow_invalidate_all(0); 1990 #ifdef INET6 1991 if (in6_present) 1992 ip6flow_invalidate_all(0); 1993 #endif /* INET6 */ 1994 #endif /* GATEWAY */ 1995 1996 { 1997 struct mbuf *n, *mpolicy; 1998 struct sadb_msg *newmsg; 1999 int off; 2000 2001 /* create new sadb_msg to reply. */ 2002 if (lft) { 2003 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 2004 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 2005 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2006 } else { 2007 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2008 SADB_X_EXT_POLICY, 2009 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2010 } 2011 if (!n) 2012 return key_senderror(so, m, ENOBUFS); 2013 2014 if (n->m_len < sizeof(*newmsg)) { 2015 n = m_pullup(n, sizeof(*newmsg)); 2016 if (!n) 2017 return key_senderror(so, m, ENOBUFS); 2018 } 2019 newmsg = mtod(n, struct sadb_msg *); 2020 newmsg->sadb_msg_errno = 0; 2021 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2022 2023 off = 0; 2024 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2025 sizeof(*xpl), &off); 2026 if (mpolicy == NULL) { 2027 /* n is already freed */ 2028 return key_senderror(so, m, ENOBUFS); 2029 } 2030 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2031 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2032 m_freem(n); 2033 return key_senderror(so, m, EINVAL); 2034 } 2035 xpl->sadb_x_policy_id = newsp->id; 2036 2037 m_freem(m); 2038 key_update_used(); 2039 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2040 } 2041 } 2042 2043 /* 2044 * get new policy id. 2045 * OUT: 2046 * 0: failure. 2047 * others: success. 2048 */ 2049 static u_int32_t 2050 key_getnewspid(void) 2051 { 2052 u_int32_t newid = 0; 2053 int count = key_spi_trycnt; /* XXX */ 2054 struct secpolicy *sp; 2055 2056 /* when requesting to allocate spi ranged */ 2057 while (count--) { 2058 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2059 2060 sp = key_getspbyid(newid); 2061 if (sp == NULL) 2062 break; 2063 2064 KEY_FREESP(&sp); 2065 } 2066 2067 if (count == 0 || newid == 0) { 2068 IPSECLOG(LOG_DEBUG, "to allocate policy id is failed.\n"); 2069 return 0; 2070 } 2071 2072 return newid; 2073 } 2074 2075 /* 2076 * SADB_SPDDELETE processing 2077 * receive 2078 * <base, address(SD), policy(*)> 2079 * from the user(?), and set SADB_SASTATE_DEAD, 2080 * and send, 2081 * <base, address(SD), policy(*)> 2082 * to the ikmpd. 2083 * policy(*) including direction of policy. 2084 * 2085 * m will always be freed. 2086 */ 2087 static int 2088 key_spddelete(struct socket *so, struct mbuf *m, 2089 const struct sadb_msghdr *mhp) 2090 { 2091 struct sadb_x_policy *xpl0; 2092 struct secpolicyindex spidx; 2093 struct secpolicy *sp; 2094 2095 KASSERT(so != NULL); 2096 KASSERT(m != NULL); 2097 KASSERT(mhp != NULL); 2098 KASSERT(mhp->msg != NULL); 2099 2100 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2101 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2102 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2103 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2104 return key_senderror(so, m, EINVAL); 2105 } 2106 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2107 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2108 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2109 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2110 return key_senderror(so, m, EINVAL); 2111 } 2112 2113 /* make secindex */ 2114 key_init_spidx_bymsghdr(&spidx, mhp); 2115 2116 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2117 2118 /* checking the direciton. */ 2119 switch (xpl0->sadb_x_policy_dir) { 2120 case IPSEC_DIR_INBOUND: 2121 case IPSEC_DIR_OUTBOUND: 2122 break; 2123 default: 2124 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2125 return key_senderror(so, m, EINVAL); 2126 } 2127 2128 /* Is there SP in SPD ? */ 2129 sp = key_getsp(&spidx); 2130 if (sp == NULL) { 2131 IPSECLOG(LOG_DEBUG, "no SP found.\n"); 2132 return key_senderror(so, m, EINVAL); 2133 } 2134 2135 /* save policy id to buffer to be returned. */ 2136 xpl0->sadb_x_policy_id = sp->id; 2137 2138 key_sp_dead(sp); 2139 key_sp_unlink(sp); /* XXX jrs ordering */ 2140 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2141 2142 /* Invalidate all cached SPD pointers in the PCBs. */ 2143 ipsec_invalpcbcacheall(); 2144 2145 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2146 2147 { 2148 struct mbuf *n; 2149 struct sadb_msg *newmsg; 2150 2151 /* create new sadb_msg to reply. */ 2152 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2153 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2154 if (!n) 2155 return key_senderror(so, m, ENOBUFS); 2156 2157 newmsg = mtod(n, struct sadb_msg *); 2158 newmsg->sadb_msg_errno = 0; 2159 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2160 2161 m_freem(m); 2162 key_update_used(); 2163 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2164 } 2165 } 2166 2167 /* 2168 * SADB_SPDDELETE2 processing 2169 * receive 2170 * <base, policy(*)> 2171 * from the user(?), and set SADB_SASTATE_DEAD, 2172 * and send, 2173 * <base, policy(*)> 2174 * to the ikmpd. 2175 * policy(*) including direction of policy. 2176 * 2177 * m will always be freed. 2178 */ 2179 static int 2180 key_spddelete2(struct socket *so, struct mbuf *m, 2181 const struct sadb_msghdr *mhp) 2182 { 2183 u_int32_t id; 2184 struct secpolicy *sp; 2185 2186 KASSERT(so != NULL); 2187 KASSERT(m != NULL); 2188 KASSERT(mhp != NULL); 2189 KASSERT(mhp->msg != NULL); 2190 2191 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2192 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2193 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2194 key_senderror(so, m, EINVAL); 2195 return 0; 2196 } 2197 2198 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2199 2200 /* Is there SP in SPD ? */ 2201 sp = key_getspbyid(id); 2202 if (sp == NULL) { 2203 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2204 return key_senderror(so, m, EINVAL); 2205 } 2206 2207 key_sp_dead(sp); 2208 key_sp_unlink(sp); /* XXX jrs ordering */ 2209 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2210 sp = NULL; 2211 2212 /* Invalidate all cached SPD pointers in the PCBs. */ 2213 ipsec_invalpcbcacheall(); 2214 2215 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2216 2217 { 2218 struct mbuf *n, *nn; 2219 struct sadb_msg *newmsg; 2220 int off, len; 2221 2222 /* create new sadb_msg to reply. */ 2223 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2224 2225 if (len > MCLBYTES) 2226 return key_senderror(so, m, ENOBUFS); 2227 MGETHDR(n, M_DONTWAIT, MT_DATA); 2228 if (n && len > MHLEN) { 2229 MCLGET(n, M_DONTWAIT); 2230 if ((n->m_flags & M_EXT) == 0) { 2231 m_freem(n); 2232 n = NULL; 2233 } 2234 } 2235 if (!n) 2236 return key_senderror(so, m, ENOBUFS); 2237 2238 n->m_len = len; 2239 n->m_next = NULL; 2240 off = 0; 2241 2242 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2243 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2244 2245 KASSERTMSG(off == len, "length inconsistency"); 2246 2247 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2248 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2249 if (!n->m_next) { 2250 m_freem(n); 2251 return key_senderror(so, m, ENOBUFS); 2252 } 2253 2254 n->m_pkthdr.len = 0; 2255 for (nn = n; nn; nn = nn->m_next) 2256 n->m_pkthdr.len += nn->m_len; 2257 2258 newmsg = mtod(n, struct sadb_msg *); 2259 newmsg->sadb_msg_errno = 0; 2260 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2261 2262 m_freem(m); 2263 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2264 } 2265 } 2266 2267 /* 2268 * SADB_X_GET processing 2269 * receive 2270 * <base, policy(*)> 2271 * from the user(?), 2272 * and send, 2273 * <base, address(SD), policy> 2274 * to the ikmpd. 2275 * policy(*) including direction of policy. 2276 * 2277 * m will always be freed. 2278 */ 2279 static int 2280 key_spdget(struct socket *so, struct mbuf *m, 2281 const struct sadb_msghdr *mhp) 2282 { 2283 u_int32_t id; 2284 struct secpolicy *sp; 2285 struct mbuf *n; 2286 2287 KASSERT(so != NULL); 2288 KASSERT(m != NULL); 2289 KASSERT(mhp != NULL); 2290 KASSERT(mhp->msg != NULL); 2291 2292 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2293 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2294 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2295 return key_senderror(so, m, EINVAL); 2296 } 2297 2298 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2299 2300 /* Is there SP in SPD ? */ 2301 sp = key_getspbyid(id); 2302 if (sp == NULL) { 2303 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2304 return key_senderror(so, m, ENOENT); 2305 } 2306 2307 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2308 mhp->msg->sadb_msg_pid); 2309 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2310 if (n != NULL) { 2311 m_freem(m); 2312 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2313 } else 2314 return key_senderror(so, m, ENOBUFS); 2315 } 2316 2317 #ifdef notyet 2318 /* 2319 * SADB_X_SPDACQUIRE processing. 2320 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2321 * send 2322 * <base, policy(*)> 2323 * to KMD, and expect to receive 2324 * <base> with SADB_X_SPDACQUIRE if error occurred, 2325 * or 2326 * <base, policy> 2327 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2328 * policy(*) is without policy requests. 2329 * 2330 * 0 : succeed 2331 * others: error number 2332 */ 2333 int 2334 key_spdacquire(const struct secpolicy *sp) 2335 { 2336 struct mbuf *result = NULL, *m; 2337 struct secspacq *newspacq; 2338 int error; 2339 2340 KASSERT(sp != NULL); 2341 KASSERTMSG(sp->req == NULL, "called but there is request"); 2342 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2343 "policy mismathed. IPsec is expected"); 2344 2345 /* Get an entry to check whether sent message or not. */ 2346 newspacq = key_getspacq(&sp->spidx); 2347 if (newspacq != NULL) { 2348 if (key_blockacq_count < newspacq->count) { 2349 /* reset counter and do send message. */ 2350 newspacq->count = 0; 2351 } else { 2352 /* increment counter and do nothing. */ 2353 newspacq->count++; 2354 return 0; 2355 } 2356 } else { 2357 /* make new entry for blocking to send SADB_ACQUIRE. */ 2358 newspacq = key_newspacq(&sp->spidx); 2359 if (newspacq == NULL) 2360 return ENOBUFS; 2361 2362 /* add to acqtree */ 2363 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2364 } 2365 2366 /* create new sadb_msg to reply. */ 2367 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2368 if (!m) { 2369 error = ENOBUFS; 2370 goto fail; 2371 } 2372 result = m; 2373 2374 result->m_pkthdr.len = 0; 2375 for (m = result; m; m = m->m_next) 2376 result->m_pkthdr.len += m->m_len; 2377 2378 mtod(result, struct sadb_msg *)->sadb_msg_len = 2379 PFKEY_UNIT64(result->m_pkthdr.len); 2380 2381 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2382 2383 fail: 2384 if (result) 2385 m_freem(result); 2386 return error; 2387 } 2388 #endif /* notyet */ 2389 2390 /* 2391 * SADB_SPDFLUSH processing 2392 * receive 2393 * <base> 2394 * from the user, and free all entries in secpctree. 2395 * and send, 2396 * <base> 2397 * to the user. 2398 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2399 * 2400 * m will always be freed. 2401 */ 2402 static int 2403 key_spdflush(struct socket *so, struct mbuf *m, 2404 const struct sadb_msghdr *mhp) 2405 { 2406 struct sadb_msg *newmsg; 2407 struct secpolicy *sp; 2408 u_int dir; 2409 2410 KASSERT(so != NULL); 2411 KASSERT(m != NULL); 2412 KASSERT(mhp != NULL); 2413 KASSERT(mhp->msg != NULL); 2414 2415 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2416 return key_senderror(so, m, EINVAL); 2417 2418 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2419 struct secpolicy * nextsp; 2420 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 2421 if (sp->state == IPSEC_SPSTATE_DEAD) 2422 continue; 2423 key_sp_dead(sp); 2424 key_sp_unlink(sp); 2425 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2426 continue; 2427 } 2428 } 2429 2430 /* Invalidate all cached SPD pointers in the PCBs. */ 2431 ipsec_invalpcbcacheall(); 2432 2433 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2434 2435 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2436 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 2437 return key_senderror(so, m, ENOBUFS); 2438 } 2439 2440 if (m->m_next) 2441 m_freem(m->m_next); 2442 m->m_next = NULL; 2443 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2444 newmsg = mtod(m, struct sadb_msg *); 2445 newmsg->sadb_msg_errno = 0; 2446 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2447 2448 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2449 } 2450 2451 static struct sockaddr key_src = { 2452 .sa_len = 2, 2453 .sa_family = PF_KEY, 2454 }; 2455 2456 static struct mbuf * 2457 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2458 { 2459 struct secpolicy *sp; 2460 int cnt; 2461 u_int dir; 2462 struct mbuf *m, *n, *prev; 2463 int totlen; 2464 2465 *lenp = 0; 2466 2467 /* search SPD entry and get buffer size. */ 2468 cnt = 0; 2469 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2470 LIST_FOREACH(sp, &sptree[dir], chain) { 2471 cnt++; 2472 } 2473 } 2474 2475 if (cnt == 0) { 2476 *errorp = ENOENT; 2477 return (NULL); 2478 } 2479 2480 m = NULL; 2481 prev = m; 2482 totlen = 0; 2483 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2484 LIST_FOREACH(sp, &sptree[dir], chain) { 2485 --cnt; 2486 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2487 2488 if (!n) { 2489 *errorp = ENOBUFS; 2490 if (m) 2491 m_freem(m); 2492 return (NULL); 2493 } 2494 2495 totlen += n->m_pkthdr.len; 2496 if (!m) { 2497 m = n; 2498 } else { 2499 prev->m_nextpkt = n; 2500 } 2501 prev = n; 2502 } 2503 } 2504 2505 *lenp = totlen; 2506 *errorp = 0; 2507 return (m); 2508 } 2509 2510 /* 2511 * SADB_SPDDUMP processing 2512 * receive 2513 * <base> 2514 * from the user, and dump all SP leaves 2515 * and send, 2516 * <base> ..... 2517 * to the ikmpd. 2518 * 2519 * m will always be freed. 2520 */ 2521 static int 2522 key_spddump(struct socket *so, struct mbuf *m0, 2523 const struct sadb_msghdr *mhp) 2524 { 2525 struct mbuf *n; 2526 int error, len; 2527 int ok, s; 2528 pid_t pid; 2529 2530 KASSERT(so != NULL); 2531 KASSERT(m0 != NULL); 2532 KASSERT(mhp != NULL); 2533 KASSERT(mhp->msg != NULL); 2534 2535 pid = mhp->msg->sadb_msg_pid; 2536 /* 2537 * If the requestor has insufficient socket-buffer space 2538 * for the entire chain, nobody gets any response to the DUMP. 2539 * XXX For now, only the requestor ever gets anything. 2540 * Moreover, if the requestor has any space at all, they receive 2541 * the entire chain, otherwise the request is refused with ENOBUFS. 2542 */ 2543 if (sbspace(&so->so_rcv) <= 0) { 2544 return key_senderror(so, m0, ENOBUFS); 2545 } 2546 2547 s = splsoftnet(); 2548 n = key_setspddump_chain(&error, &len, pid); 2549 splx(s); 2550 2551 if (n == NULL) { 2552 return key_senderror(so, m0, ENOENT); 2553 } 2554 { 2555 uint64_t *ps = PFKEY_STAT_GETREF(); 2556 ps[PFKEY_STAT_IN_TOTAL]++; 2557 ps[PFKEY_STAT_IN_BYTES] += len; 2558 PFKEY_STAT_PUTREF(); 2559 } 2560 2561 /* 2562 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2563 * The requestor receives either the entire chain, or an 2564 * error message with ENOBUFS. 2565 */ 2566 2567 /* 2568 * sbappendchainwith record takes the chain of entries, one 2569 * packet-record per SPD entry, prepends the key_src sockaddr 2570 * to each packet-record, links the sockaddr mbufs into a new 2571 * list of records, then appends the entire resulting 2572 * list to the requesting socket. 2573 */ 2574 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 2575 SB_PRIO_ONESHOT_OVERFLOW); 2576 2577 if (!ok) { 2578 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2579 m_freem(n); 2580 return key_senderror(so, m0, ENOBUFS); 2581 } 2582 2583 m_freem(m0); 2584 return error; 2585 } 2586 2587 /* 2588 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2589 */ 2590 static int 2591 key_nat_map(struct socket *so, struct mbuf *m, 2592 const struct sadb_msghdr *mhp) 2593 { 2594 struct sadb_x_nat_t_type *type; 2595 struct sadb_x_nat_t_port *sport; 2596 struct sadb_x_nat_t_port *dport; 2597 struct sadb_address *iaddr, *raddr; 2598 struct sadb_x_nat_t_frag *frag; 2599 2600 KASSERT(so != NULL); 2601 KASSERT(m != NULL); 2602 KASSERT(mhp != NULL); 2603 KASSERT(mhp->msg != NULL); 2604 2605 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2606 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2607 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2608 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2609 return key_senderror(so, m, EINVAL); 2610 } 2611 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2612 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2613 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2614 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2615 return key_senderror(so, m, EINVAL); 2616 } 2617 2618 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2619 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2620 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2621 return key_senderror(so, m, EINVAL); 2622 } 2623 2624 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2625 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2626 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2627 return key_senderror(so, m, EINVAL); 2628 } 2629 2630 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2631 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2632 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2633 return key_senderror(so, m, EINVAL); 2634 } 2635 2636 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2637 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2638 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2639 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2640 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2641 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2642 2643 /* 2644 * XXX handle that, it should also contain a SA, or anything 2645 * that enable to update the SA information. 2646 */ 2647 2648 return 0; 2649 } 2650 2651 static struct mbuf * 2652 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2653 { 2654 struct mbuf *result = NULL, *m; 2655 2656 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2657 if (!m) 2658 goto fail; 2659 result = m; 2660 2661 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2662 &sp->spidx.src.sa, sp->spidx.prefs, sp->spidx.ul_proto); 2663 if (!m) 2664 goto fail; 2665 m_cat(result, m); 2666 2667 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2668 &sp->spidx.dst.sa, sp->spidx.prefd, sp->spidx.ul_proto); 2669 if (!m) 2670 goto fail; 2671 m_cat(result, m); 2672 2673 m = key_sp2msg(sp); 2674 if (!m) 2675 goto fail; 2676 m_cat(result, m); 2677 2678 if ((result->m_flags & M_PKTHDR) == 0) 2679 goto fail; 2680 2681 if (result->m_len < sizeof(struct sadb_msg)) { 2682 result = m_pullup(result, sizeof(struct sadb_msg)); 2683 if (result == NULL) 2684 goto fail; 2685 } 2686 2687 result->m_pkthdr.len = 0; 2688 for (m = result; m; m = m->m_next) 2689 result->m_pkthdr.len += m->m_len; 2690 2691 mtod(result, struct sadb_msg *)->sadb_msg_len = 2692 PFKEY_UNIT64(result->m_pkthdr.len); 2693 2694 return result; 2695 2696 fail: 2697 m_freem(result); 2698 return NULL; 2699 } 2700 2701 /* 2702 * get PFKEY message length for security policy and request. 2703 */ 2704 static u_int 2705 key_getspreqmsglen(const struct secpolicy *sp) 2706 { 2707 u_int tlen; 2708 2709 tlen = sizeof(struct sadb_x_policy); 2710 2711 /* if is the policy for ipsec ? */ 2712 if (sp->policy != IPSEC_POLICY_IPSEC) 2713 return tlen; 2714 2715 /* get length of ipsec requests */ 2716 { 2717 const struct ipsecrequest *isr; 2718 int len; 2719 2720 for (isr = sp->req; isr != NULL; isr = isr->next) { 2721 len = sizeof(struct sadb_x_ipsecrequest) 2722 + isr->saidx.src.sa.sa_len + isr->saidx.dst.sa.sa_len; 2723 2724 tlen += PFKEY_ALIGN8(len); 2725 } 2726 } 2727 2728 return tlen; 2729 } 2730 2731 /* 2732 * SADB_SPDEXPIRE processing 2733 * send 2734 * <base, address(SD), lifetime(CH), policy> 2735 * to KMD by PF_KEY. 2736 * 2737 * OUT: 0 : succeed 2738 * others : error number 2739 */ 2740 static int 2741 key_spdexpire(struct secpolicy *sp) 2742 { 2743 int s; 2744 struct mbuf *result = NULL, *m; 2745 int len; 2746 int error = -1; 2747 struct sadb_lifetime *lt; 2748 2749 /* XXX: Why do we lock ? */ 2750 s = splsoftnet(); /*called from softclock()*/ 2751 2752 KASSERT(sp != NULL); 2753 2754 /* set msg header */ 2755 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2756 if (!m) { 2757 error = ENOBUFS; 2758 goto fail; 2759 } 2760 result = m; 2761 2762 /* create lifetime extension (current and hard) */ 2763 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2764 m = key_alloc_mbuf(len); 2765 if (!m || m->m_next) { /*XXX*/ 2766 if (m) 2767 m_freem(m); 2768 error = ENOBUFS; 2769 goto fail; 2770 } 2771 memset(mtod(m, void *), 0, len); 2772 lt = mtod(m, struct sadb_lifetime *); 2773 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2774 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2775 lt->sadb_lifetime_allocations = 0; 2776 lt->sadb_lifetime_bytes = 0; 2777 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2778 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2779 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2780 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2781 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2782 lt->sadb_lifetime_allocations = 0; 2783 lt->sadb_lifetime_bytes = 0; 2784 lt->sadb_lifetime_addtime = sp->lifetime; 2785 lt->sadb_lifetime_usetime = sp->validtime; 2786 m_cat(result, m); 2787 2788 /* set sadb_address for source */ 2789 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sp->spidx.src.sa, 2790 sp->spidx.prefs, sp->spidx.ul_proto); 2791 if (!m) { 2792 error = ENOBUFS; 2793 goto fail; 2794 } 2795 m_cat(result, m); 2796 2797 /* set sadb_address for destination */ 2798 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sp->spidx.dst.sa, 2799 sp->spidx.prefd, sp->spidx.ul_proto); 2800 if (!m) { 2801 error = ENOBUFS; 2802 goto fail; 2803 } 2804 m_cat(result, m); 2805 2806 /* set secpolicy */ 2807 m = key_sp2msg(sp); 2808 if (!m) { 2809 error = ENOBUFS; 2810 goto fail; 2811 } 2812 m_cat(result, m); 2813 2814 if ((result->m_flags & M_PKTHDR) == 0) { 2815 error = EINVAL; 2816 goto fail; 2817 } 2818 2819 if (result->m_len < sizeof(struct sadb_msg)) { 2820 result = m_pullup(result, sizeof(struct sadb_msg)); 2821 if (result == NULL) { 2822 error = ENOBUFS; 2823 goto fail; 2824 } 2825 } 2826 2827 result->m_pkthdr.len = 0; 2828 for (m = result; m; m = m->m_next) 2829 result->m_pkthdr.len += m->m_len; 2830 2831 mtod(result, struct sadb_msg *)->sadb_msg_len = 2832 PFKEY_UNIT64(result->m_pkthdr.len); 2833 2834 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2835 2836 fail: 2837 if (result) 2838 m_freem(result); 2839 splx(s); 2840 return error; 2841 } 2842 2843 /* %%% SAD management */ 2844 /* 2845 * allocating a memory for new SA head, and copy from the values of mhp. 2846 * OUT: NULL : failure due to the lack of memory. 2847 * others : pointer to new SA head. 2848 */ 2849 static struct secashead * 2850 key_newsah(const struct secasindex *saidx) 2851 { 2852 struct secashead *newsah; 2853 int i; 2854 2855 KASSERT(saidx != NULL); 2856 2857 newsah = kmem_zalloc(sizeof(struct secashead), KM_SLEEP); 2858 for (i = 0; i < __arraycount(newsah->savtree); i++) 2859 LIST_INIT(&newsah->savtree[i]); 2860 newsah->saidx = *saidx; 2861 2862 /* add to saidxtree */ 2863 newsah->state = SADB_SASTATE_MATURE; 2864 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2865 2866 return newsah; 2867 } 2868 2869 /* 2870 * delete SA index and all SA registerd. 2871 */ 2872 static void 2873 key_delsah(struct secashead *sah) 2874 { 2875 struct secasvar *sav, *nextsav; 2876 u_int state; 2877 int s; 2878 int zombie = 0; 2879 2880 KASSERT(!cpu_softintr_p()); 2881 KASSERT(sah != NULL); 2882 2883 s = splsoftnet(); 2884 2885 /* searching all SA registerd in the secindex. */ 2886 SASTATE_ANY_FOREACH(state) { 2887 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2888 if (sav->refcnt == 0) { 2889 /* sanity check */ 2890 KEY_CHKSASTATE(state, sav->state); 2891 KEY_FREESAV(&sav); 2892 } else { 2893 /* give up to delete this sa */ 2894 zombie++; 2895 } 2896 } 2897 } 2898 2899 /* don't delete sah only if there are savs. */ 2900 if (zombie) { 2901 splx(s); 2902 return; 2903 } 2904 2905 rtcache_free(&sah->sa_route); 2906 2907 /* remove from tree of SA index */ 2908 KASSERT(__LIST_CHAINED(sah)); 2909 LIST_REMOVE(sah, chain); 2910 2911 if (sah->idents != NULL) 2912 kmem_free(sah->idents, sah->idents_len); 2913 if (sah->identd != NULL) 2914 kmem_free(sah->identd, sah->identd_len); 2915 2916 kmem_free(sah, sizeof(*sah)); 2917 2918 splx(s); 2919 return; 2920 } 2921 2922 /* 2923 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2924 * and copy the values of mhp into new buffer. 2925 * When SAD message type is GETSPI: 2926 * to set sequence number from acq_seq++, 2927 * to set zero to SPI. 2928 * not to call key_setsava(). 2929 * OUT: NULL : fail 2930 * others : pointer to new secasvar. 2931 * 2932 * does not modify mbuf. does not free mbuf on error. 2933 */ 2934 static struct secasvar * 2935 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2936 struct secashead *sah, int *errp, 2937 const char* where, int tag) 2938 { 2939 struct secasvar *newsav; 2940 const struct sadb_sa *xsa; 2941 2942 KASSERT(!cpu_softintr_p()); 2943 KASSERT(m != NULL); 2944 KASSERT(mhp != NULL); 2945 KASSERT(mhp->msg != NULL); 2946 KASSERT(sah != NULL); 2947 2948 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 2949 2950 switch (mhp->msg->sadb_msg_type) { 2951 case SADB_GETSPI: 2952 newsav->spi = 0; 2953 2954 #ifdef IPSEC_DOSEQCHECK 2955 /* sync sequence number */ 2956 if (mhp->msg->sadb_msg_seq == 0) 2957 newsav->seq = 2958 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2959 else 2960 #endif 2961 newsav->seq = mhp->msg->sadb_msg_seq; 2962 break; 2963 2964 case SADB_ADD: 2965 /* sanity check */ 2966 if (mhp->ext[SADB_EXT_SA] == NULL) { 2967 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2968 *errp = EINVAL; 2969 goto error; 2970 } 2971 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2972 newsav->spi = xsa->sadb_sa_spi; 2973 newsav->seq = mhp->msg->sadb_msg_seq; 2974 break; 2975 default: 2976 *errp = EINVAL; 2977 goto error; 2978 } 2979 2980 /* copy sav values */ 2981 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2982 *errp = key_setsaval(newsav, m, mhp); 2983 if (*errp) 2984 goto error; 2985 } 2986 2987 /* reset created */ 2988 newsav->created = time_uptime; 2989 newsav->pid = mhp->msg->sadb_msg_pid; 2990 2991 /* add to satree */ 2992 newsav->sah = sah; 2993 newsav->refcnt = 1; 2994 newsav->state = SADB_SASTATE_LARVAL; 2995 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2996 secasvar, chain); 2997 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 2998 "DP from %s:%u return SA:%p\n", where, tag, newsav); 2999 return newsav; 3000 3001 error: 3002 KASSERT(*errp != 0); 3003 kmem_free(newsav, sizeof(*newsav)); 3004 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3005 "DP from %s:%u return SA:NULL\n", where, tag); 3006 return NULL; 3007 } 3008 3009 /* 3010 * free() SA variable entry. 3011 */ 3012 static void 3013 key_delsav(struct secasvar *sav) 3014 { 3015 3016 KASSERT(sav != NULL); 3017 KASSERTMSG(sav->refcnt == 0, "reference count %u > 0", sav->refcnt); 3018 3019 /* remove from SA header */ 3020 KASSERT(__LIST_CHAINED(sav)); 3021 LIST_REMOVE(sav, chain); 3022 3023 /* 3024 * Cleanup xform state. Note that zeroize'ing causes the 3025 * keys to be cleared; otherwise we must do it ourself. 3026 */ 3027 if (sav->tdb_xform != NULL) { 3028 sav->tdb_xform->xf_zeroize(sav); 3029 sav->tdb_xform = NULL; 3030 } else { 3031 if (sav->key_auth != NULL) 3032 explicit_memset(_KEYBUF(sav->key_auth), 0, 3033 _KEYLEN(sav->key_auth)); 3034 if (sav->key_enc != NULL) 3035 explicit_memset(_KEYBUF(sav->key_enc), 0, 3036 _KEYLEN(sav->key_enc)); 3037 } 3038 3039 key_freesaval(sav); 3040 kmem_intr_free(sav, sizeof(*sav)); 3041 3042 return; 3043 } 3044 3045 /* 3046 * search SAD. 3047 * OUT: 3048 * NULL : not found 3049 * others : found, pointer to a SA. 3050 */ 3051 static struct secashead * 3052 key_getsah(const struct secasindex *saidx) 3053 { 3054 struct secashead *sah; 3055 3056 LIST_FOREACH(sah, &sahtree, chain) { 3057 if (sah->state == SADB_SASTATE_DEAD) 3058 continue; 3059 if (key_saidx_match(&sah->saidx, saidx, CMP_REQID)) 3060 return sah; 3061 } 3062 3063 return NULL; 3064 } 3065 3066 /* 3067 * check not to be duplicated SPI. 3068 * NOTE: this function is too slow due to searching all SAD. 3069 * OUT: 3070 * NULL : not found 3071 * others : found, pointer to a SA. 3072 */ 3073 static struct secasvar * 3074 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3075 { 3076 struct secashead *sah; 3077 struct secasvar *sav; 3078 3079 /* check address family */ 3080 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3081 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 3082 return NULL; 3083 } 3084 3085 /* check all SAD */ 3086 LIST_FOREACH(sah, &sahtree, chain) { 3087 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3088 continue; 3089 sav = key_getsavbyspi(sah, spi); 3090 if (sav != NULL) 3091 return sav; 3092 } 3093 3094 return NULL; 3095 } 3096 3097 /* 3098 * search SAD litmited alive SA, protocol, SPI. 3099 * OUT: 3100 * NULL : not found 3101 * others : found, pointer to a SA. 3102 */ 3103 static struct secasvar * 3104 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3105 { 3106 struct secasvar *sav; 3107 u_int state; 3108 3109 /* search all status */ 3110 SASTATE_ALIVE_FOREACH(state) { 3111 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3112 3113 /* sanity check */ 3114 if (sav->state != state) { 3115 IPSECLOG(LOG_DEBUG, 3116 "invalid sav->state (queue: %d SA: %d)\n", 3117 state, sav->state); 3118 continue; 3119 } 3120 3121 if (sav->spi == spi) 3122 return sav; 3123 } 3124 } 3125 3126 return NULL; 3127 } 3128 3129 /* 3130 * Free allocated data to member variables of sav: 3131 * sav->replay, sav->key_* and sav->lft_*. 3132 */ 3133 static void 3134 key_freesaval(struct secasvar *sav) 3135 { 3136 3137 if (sav->replay != NULL) { 3138 kmem_intr_free(sav->replay, sav->replay_len); 3139 sav->replay = NULL; 3140 sav->replay_len = 0; 3141 } 3142 if (sav->key_auth != NULL) { 3143 kmem_intr_free(sav->key_auth, sav->key_auth_len); 3144 sav->key_auth = NULL; 3145 sav->key_auth_len = 0; 3146 } 3147 if (sav->key_enc != NULL) { 3148 kmem_intr_free(sav->key_enc, sav->key_enc_len); 3149 sav->key_enc = NULL; 3150 sav->key_enc_len = 0; 3151 } 3152 if (sav->lft_c != NULL) { 3153 kmem_intr_free(sav->lft_c, sizeof(*(sav->lft_c))); 3154 sav->lft_c = NULL; 3155 } 3156 if (sav->lft_h != NULL) { 3157 kmem_intr_free(sav->lft_h, sizeof(*(sav->lft_h))); 3158 sav->lft_h = NULL; 3159 } 3160 if (sav->lft_s != NULL) { 3161 kmem_intr_free(sav->lft_s, sizeof(*(sav->lft_s))); 3162 sav->lft_s = NULL; 3163 } 3164 } 3165 3166 /* 3167 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3168 * You must update these if need. 3169 * OUT: 0: success. 3170 * !0: failure. 3171 * 3172 * does not modify mbuf. does not free mbuf on error. 3173 */ 3174 static int 3175 key_setsaval(struct secasvar *sav, struct mbuf *m, 3176 const struct sadb_msghdr *mhp) 3177 { 3178 int error = 0; 3179 3180 KASSERT(!cpu_softintr_p()); 3181 KASSERT(m != NULL); 3182 KASSERT(mhp != NULL); 3183 KASSERT(mhp->msg != NULL); 3184 3185 /* initialization */ 3186 key_freesaval(sav); 3187 sav->tdb_xform = NULL; /* transform */ 3188 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3189 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3190 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3191 sav->natt_type = 0; 3192 sav->esp_frag = 0; 3193 3194 /* SA */ 3195 if (mhp->ext[SADB_EXT_SA] != NULL) { 3196 const struct sadb_sa *sa0; 3197 3198 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3199 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3200 error = EINVAL; 3201 goto fail; 3202 } 3203 3204 sav->alg_auth = sa0->sadb_sa_auth; 3205 sav->alg_enc = sa0->sadb_sa_encrypt; 3206 sav->flags = sa0->sadb_sa_flags; 3207 3208 /* replay window */ 3209 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3210 size_t len = sizeof(struct secreplay) + 3211 sa0->sadb_sa_replay; 3212 sav->replay = kmem_zalloc(len, KM_SLEEP); 3213 sav->replay_len = len; 3214 if (sa0->sadb_sa_replay != 0) 3215 sav->replay->bitmap = (char*)(sav->replay+1); 3216 sav->replay->wsize = sa0->sadb_sa_replay; 3217 } 3218 } 3219 3220 /* Authentication keys */ 3221 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3222 const struct sadb_key *key0; 3223 int len; 3224 3225 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3226 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3227 3228 error = 0; 3229 if (len < sizeof(*key0)) { 3230 error = EINVAL; 3231 goto fail; 3232 } 3233 switch (mhp->msg->sadb_msg_satype) { 3234 case SADB_SATYPE_AH: 3235 case SADB_SATYPE_ESP: 3236 case SADB_X_SATYPE_TCPSIGNATURE: 3237 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3238 sav->alg_auth != SADB_X_AALG_NULL) 3239 error = EINVAL; 3240 break; 3241 case SADB_X_SATYPE_IPCOMP: 3242 default: 3243 error = EINVAL; 3244 break; 3245 } 3246 if (error) { 3247 IPSECLOG(LOG_DEBUG, "invalid key_auth values.\n"); 3248 goto fail; 3249 } 3250 3251 sav->key_auth = key_newbuf(key0, len); 3252 sav->key_auth_len = len; 3253 } 3254 3255 /* Encryption key */ 3256 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3257 const struct sadb_key *key0; 3258 int len; 3259 3260 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3261 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3262 3263 error = 0; 3264 if (len < sizeof(*key0)) { 3265 error = EINVAL; 3266 goto fail; 3267 } 3268 switch (mhp->msg->sadb_msg_satype) { 3269 case SADB_SATYPE_ESP: 3270 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3271 sav->alg_enc != SADB_EALG_NULL) { 3272 error = EINVAL; 3273 break; 3274 } 3275 sav->key_enc = key_newbuf(key0, len); 3276 sav->key_enc_len = len; 3277 break; 3278 case SADB_X_SATYPE_IPCOMP: 3279 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3280 error = EINVAL; 3281 sav->key_enc = NULL; /*just in case*/ 3282 break; 3283 case SADB_SATYPE_AH: 3284 case SADB_X_SATYPE_TCPSIGNATURE: 3285 default: 3286 error = EINVAL; 3287 break; 3288 } 3289 if (error) { 3290 IPSECLOG(LOG_DEBUG, "invalid key_enc value.\n"); 3291 goto fail; 3292 } 3293 } 3294 3295 /* set iv */ 3296 sav->ivlen = 0; 3297 3298 switch (mhp->msg->sadb_msg_satype) { 3299 case SADB_SATYPE_AH: 3300 error = xform_init(sav, XF_AH); 3301 break; 3302 case SADB_SATYPE_ESP: 3303 error = xform_init(sav, XF_ESP); 3304 break; 3305 case SADB_X_SATYPE_IPCOMP: 3306 error = xform_init(sav, XF_IPCOMP); 3307 break; 3308 case SADB_X_SATYPE_TCPSIGNATURE: 3309 error = xform_init(sav, XF_TCPSIGNATURE); 3310 break; 3311 } 3312 if (error) { 3313 IPSECLOG(LOG_DEBUG, "unable to initialize SA type %u.\n", 3314 mhp->msg->sadb_msg_satype); 3315 goto fail; 3316 } 3317 3318 /* reset created */ 3319 sav->created = time_uptime; 3320 3321 /* make lifetime for CURRENT */ 3322 sav->lft_c = kmem_alloc(sizeof(struct sadb_lifetime), KM_SLEEP); 3323 3324 sav->lft_c->sadb_lifetime_len = 3325 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3326 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3327 sav->lft_c->sadb_lifetime_allocations = 0; 3328 sav->lft_c->sadb_lifetime_bytes = 0; 3329 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3330 sav->lft_c->sadb_lifetime_usetime = 0; 3331 3332 /* lifetimes for HARD and SOFT */ 3333 { 3334 const struct sadb_lifetime *lft0; 3335 3336 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3337 if (lft0 != NULL) { 3338 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3339 error = EINVAL; 3340 goto fail; 3341 } 3342 sav->lft_h = key_newbuf(lft0, sizeof(*lft0)); 3343 } 3344 3345 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3346 if (lft0 != NULL) { 3347 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3348 error = EINVAL; 3349 goto fail; 3350 } 3351 sav->lft_s = key_newbuf(lft0, sizeof(*lft0)); 3352 /* to be initialize ? */ 3353 } 3354 } 3355 3356 return 0; 3357 3358 fail: 3359 /* initialization */ 3360 key_freesaval(sav); 3361 3362 return error; 3363 } 3364 3365 /* 3366 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3367 * OUT: 0: valid 3368 * other: errno 3369 */ 3370 static int 3371 key_mature(struct secasvar *sav) 3372 { 3373 int error; 3374 3375 /* check SPI value */ 3376 switch (sav->sah->saidx.proto) { 3377 case IPPROTO_ESP: 3378 case IPPROTO_AH: 3379 if (ntohl(sav->spi) <= 255) { 3380 IPSECLOG(LOG_DEBUG, "illegal range of SPI %u.\n", 3381 (u_int32_t)ntohl(sav->spi)); 3382 return EINVAL; 3383 } 3384 break; 3385 } 3386 3387 /* check satype */ 3388 switch (sav->sah->saidx.proto) { 3389 case IPPROTO_ESP: 3390 /* check flags */ 3391 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3392 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3393 IPSECLOG(LOG_DEBUG, 3394 "invalid flag (derived) given to old-esp.\n"); 3395 return EINVAL; 3396 } 3397 error = xform_init(sav, XF_ESP); 3398 break; 3399 case IPPROTO_AH: 3400 /* check flags */ 3401 if (sav->flags & SADB_X_EXT_DERIV) { 3402 IPSECLOG(LOG_DEBUG, 3403 "invalid flag (derived) given to AH SA.\n"); 3404 return EINVAL; 3405 } 3406 if (sav->alg_enc != SADB_EALG_NONE) { 3407 IPSECLOG(LOG_DEBUG, 3408 "protocol and algorithm mismated.\n"); 3409 return(EINVAL); 3410 } 3411 error = xform_init(sav, XF_AH); 3412 break; 3413 case IPPROTO_IPCOMP: 3414 if (sav->alg_auth != SADB_AALG_NONE) { 3415 IPSECLOG(LOG_DEBUG, 3416 "protocol and algorithm mismated.\n"); 3417 return(EINVAL); 3418 } 3419 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3420 && ntohl(sav->spi) >= 0x10000) { 3421 IPSECLOG(LOG_DEBUG, "invalid cpi for IPComp.\n"); 3422 return(EINVAL); 3423 } 3424 error = xform_init(sav, XF_IPCOMP); 3425 break; 3426 case IPPROTO_TCP: 3427 if (sav->alg_enc != SADB_EALG_NONE) { 3428 IPSECLOG(LOG_DEBUG, 3429 "protocol and algorithm mismated.\n"); 3430 return(EINVAL); 3431 } 3432 error = xform_init(sav, XF_TCPSIGNATURE); 3433 break; 3434 default: 3435 IPSECLOG(LOG_DEBUG, "Invalid satype.\n"); 3436 error = EPROTONOSUPPORT; 3437 break; 3438 } 3439 if (error == 0) 3440 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3441 return (error); 3442 } 3443 3444 /* 3445 * subroutine for SADB_GET and SADB_DUMP. 3446 */ 3447 static struct mbuf * 3448 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3449 u_int32_t seq, u_int32_t pid) 3450 { 3451 struct mbuf *result = NULL, *tres = NULL, *m; 3452 int l = 0; 3453 int i; 3454 void *p; 3455 struct sadb_lifetime lt; 3456 int dumporder[] = { 3457 SADB_EXT_SA, SADB_X_EXT_SA2, 3458 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3459 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3460 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3461 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3462 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3463 SADB_X_EXT_NAT_T_TYPE, 3464 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3465 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3466 SADB_X_EXT_NAT_T_FRAG, 3467 3468 }; 3469 3470 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3471 if (m == NULL) 3472 goto fail; 3473 result = m; 3474 3475 for (i = __arraycount(dumporder) - 1; i >= 0; i--) { 3476 m = NULL; 3477 p = NULL; 3478 switch (dumporder[i]) { 3479 case SADB_EXT_SA: 3480 m = key_setsadbsa(sav); 3481 break; 3482 3483 case SADB_X_EXT_SA2: 3484 m = key_setsadbxsa2(sav->sah->saidx.mode, 3485 sav->replay ? sav->replay->count : 0, 3486 sav->sah->saidx.reqid); 3487 break; 3488 3489 case SADB_EXT_ADDRESS_SRC: 3490 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3491 &sav->sah->saidx.src.sa, 3492 FULLMASK, IPSEC_ULPROTO_ANY); 3493 break; 3494 3495 case SADB_EXT_ADDRESS_DST: 3496 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3497 &sav->sah->saidx.dst.sa, 3498 FULLMASK, IPSEC_ULPROTO_ANY); 3499 break; 3500 3501 case SADB_EXT_KEY_AUTH: 3502 if (!sav->key_auth) 3503 continue; 3504 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3505 p = sav->key_auth; 3506 break; 3507 3508 case SADB_EXT_KEY_ENCRYPT: 3509 if (!sav->key_enc) 3510 continue; 3511 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3512 p = sav->key_enc; 3513 break; 3514 3515 case SADB_EXT_LIFETIME_CURRENT: 3516 if (!sav->lft_c) 3517 continue; 3518 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3519 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3520 lt.sadb_lifetime_addtime += time_second - time_uptime; 3521 lt.sadb_lifetime_usetime += time_second - time_uptime; 3522 p = < 3523 break; 3524 3525 case SADB_EXT_LIFETIME_HARD: 3526 if (!sav->lft_h) 3527 continue; 3528 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3529 p = sav->lft_h; 3530 break; 3531 3532 case SADB_EXT_LIFETIME_SOFT: 3533 if (!sav->lft_s) 3534 continue; 3535 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3536 p = sav->lft_s; 3537 break; 3538 3539 case SADB_X_EXT_NAT_T_TYPE: 3540 m = key_setsadbxtype(sav->natt_type); 3541 break; 3542 3543 case SADB_X_EXT_NAT_T_DPORT: 3544 if (sav->natt_type == 0) 3545 continue; 3546 m = key_setsadbxport( 3547 key_portfromsaddr(&sav->sah->saidx.dst), 3548 SADB_X_EXT_NAT_T_DPORT); 3549 break; 3550 3551 case SADB_X_EXT_NAT_T_SPORT: 3552 if (sav->natt_type == 0) 3553 continue; 3554 m = key_setsadbxport( 3555 key_portfromsaddr(&sav->sah->saidx.src), 3556 SADB_X_EXT_NAT_T_SPORT); 3557 break; 3558 3559 case SADB_X_EXT_NAT_T_FRAG: 3560 /* don't send frag info if not set */ 3561 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3562 continue; 3563 m = key_setsadbxfrag(sav->esp_frag); 3564 break; 3565 3566 case SADB_X_EXT_NAT_T_OAI: 3567 case SADB_X_EXT_NAT_T_OAR: 3568 continue; 3569 3570 case SADB_EXT_ADDRESS_PROXY: 3571 case SADB_EXT_IDENTITY_SRC: 3572 case SADB_EXT_IDENTITY_DST: 3573 /* XXX: should we brought from SPD ? */ 3574 case SADB_EXT_SENSITIVITY: 3575 default: 3576 continue; 3577 } 3578 3579 KASSERT(!(m && p)); 3580 if (!m && !p) 3581 goto fail; 3582 if (p && tres) { 3583 M_PREPEND(tres, l, M_DONTWAIT); 3584 if (!tres) 3585 goto fail; 3586 memcpy(mtod(tres, void *), p, l); 3587 continue; 3588 } 3589 if (p) { 3590 m = key_alloc_mbuf(l); 3591 if (!m) 3592 goto fail; 3593 m_copyback(m, 0, l, p); 3594 } 3595 3596 if (tres) 3597 m_cat(m, tres); 3598 tres = m; 3599 } 3600 3601 m_cat(result, tres); 3602 tres = NULL; /* avoid free on error below */ 3603 3604 if (result->m_len < sizeof(struct sadb_msg)) { 3605 result = m_pullup(result, sizeof(struct sadb_msg)); 3606 if (result == NULL) 3607 goto fail; 3608 } 3609 3610 result->m_pkthdr.len = 0; 3611 for (m = result; m; m = m->m_next) 3612 result->m_pkthdr.len += m->m_len; 3613 3614 mtod(result, struct sadb_msg *)->sadb_msg_len = 3615 PFKEY_UNIT64(result->m_pkthdr.len); 3616 3617 return result; 3618 3619 fail: 3620 m_freem(result); 3621 m_freem(tres); 3622 return NULL; 3623 } 3624 3625 3626 /* 3627 * set a type in sadb_x_nat_t_type 3628 */ 3629 static struct mbuf * 3630 key_setsadbxtype(u_int16_t type) 3631 { 3632 struct mbuf *m; 3633 size_t len; 3634 struct sadb_x_nat_t_type *p; 3635 3636 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3637 3638 m = key_alloc_mbuf(len); 3639 if (!m || m->m_next) { /*XXX*/ 3640 if (m) 3641 m_freem(m); 3642 return NULL; 3643 } 3644 3645 p = mtod(m, struct sadb_x_nat_t_type *); 3646 3647 memset(p, 0, len); 3648 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3649 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3650 p->sadb_x_nat_t_type_type = type; 3651 3652 return m; 3653 } 3654 /* 3655 * set a port in sadb_x_nat_t_port. port is in network order 3656 */ 3657 static struct mbuf * 3658 key_setsadbxport(u_int16_t port, u_int16_t type) 3659 { 3660 struct mbuf *m; 3661 size_t len; 3662 struct sadb_x_nat_t_port *p; 3663 3664 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3665 3666 m = key_alloc_mbuf(len); 3667 if (!m || m->m_next) { /*XXX*/ 3668 if (m) 3669 m_freem(m); 3670 return NULL; 3671 } 3672 3673 p = mtod(m, struct sadb_x_nat_t_port *); 3674 3675 memset(p, 0, len); 3676 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3677 p->sadb_x_nat_t_port_exttype = type; 3678 p->sadb_x_nat_t_port_port = port; 3679 3680 return m; 3681 } 3682 3683 /* 3684 * set fragmentation info in sadb_x_nat_t_frag 3685 */ 3686 static struct mbuf * 3687 key_setsadbxfrag(u_int16_t flen) 3688 { 3689 struct mbuf *m; 3690 size_t len; 3691 struct sadb_x_nat_t_frag *p; 3692 3693 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3694 3695 m = key_alloc_mbuf(len); 3696 if (!m || m->m_next) { /*XXX*/ 3697 if (m) 3698 m_freem(m); 3699 return NULL; 3700 } 3701 3702 p = mtod(m, struct sadb_x_nat_t_frag *); 3703 3704 memset(p, 0, len); 3705 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3706 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3707 p->sadb_x_nat_t_frag_fraglen = flen; 3708 3709 return m; 3710 } 3711 3712 /* 3713 * Get port from sockaddr, port is in network order 3714 */ 3715 u_int16_t 3716 key_portfromsaddr(const union sockaddr_union *saddr) 3717 { 3718 u_int16_t port; 3719 3720 switch (saddr->sa.sa_family) { 3721 case AF_INET: { 3722 port = saddr->sin.sin_port; 3723 break; 3724 } 3725 #ifdef INET6 3726 case AF_INET6: { 3727 port = saddr->sin6.sin6_port; 3728 break; 3729 } 3730 #endif 3731 default: 3732 printf("%s: unexpected address family\n", __func__); 3733 port = 0; 3734 break; 3735 } 3736 3737 return port; 3738 } 3739 3740 3741 /* 3742 * Set port is struct sockaddr. port is in network order 3743 */ 3744 static void 3745 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3746 { 3747 switch (saddr->sa.sa_family) { 3748 case AF_INET: { 3749 saddr->sin.sin_port = port; 3750 break; 3751 } 3752 #ifdef INET6 3753 case AF_INET6: { 3754 saddr->sin6.sin6_port = port; 3755 break; 3756 } 3757 #endif 3758 default: 3759 printf("%s: unexpected address family %d\n", __func__, 3760 saddr->sa.sa_family); 3761 break; 3762 } 3763 3764 return; 3765 } 3766 3767 /* 3768 * Safety check sa_len 3769 */ 3770 static int 3771 key_checksalen(const union sockaddr_union *saddr) 3772 { 3773 switch (saddr->sa.sa_family) { 3774 case AF_INET: 3775 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3776 return -1; 3777 break; 3778 #ifdef INET6 3779 case AF_INET6: 3780 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3781 return -1; 3782 break; 3783 #endif 3784 default: 3785 printf("%s: unexpected sa_family %d\n", __func__, 3786 saddr->sa.sa_family); 3787 return -1; 3788 break; 3789 } 3790 return 0; 3791 } 3792 3793 3794 /* 3795 * set data into sadb_msg. 3796 */ 3797 static struct mbuf * 3798 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3799 u_int32_t seq, pid_t pid, u_int16_t reserved) 3800 { 3801 struct mbuf *m; 3802 struct sadb_msg *p; 3803 int len; 3804 3805 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3806 if (len > MCLBYTES) 3807 return NULL; 3808 MGETHDR(m, M_DONTWAIT, MT_DATA); 3809 if (m && len > MHLEN) { 3810 MCLGET(m, M_DONTWAIT); 3811 if ((m->m_flags & M_EXT) == 0) { 3812 m_freem(m); 3813 m = NULL; 3814 } 3815 } 3816 if (!m) 3817 return NULL; 3818 m->m_pkthdr.len = m->m_len = len; 3819 m->m_next = NULL; 3820 3821 p = mtod(m, struct sadb_msg *); 3822 3823 memset(p, 0, len); 3824 p->sadb_msg_version = PF_KEY_V2; 3825 p->sadb_msg_type = type; 3826 p->sadb_msg_errno = 0; 3827 p->sadb_msg_satype = satype; 3828 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3829 p->sadb_msg_reserved = reserved; 3830 p->sadb_msg_seq = seq; 3831 p->sadb_msg_pid = (u_int32_t)pid; 3832 3833 return m; 3834 } 3835 3836 /* 3837 * copy secasvar data into sadb_address. 3838 */ 3839 static struct mbuf * 3840 key_setsadbsa(struct secasvar *sav) 3841 { 3842 struct mbuf *m; 3843 struct sadb_sa *p; 3844 int len; 3845 3846 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3847 m = key_alloc_mbuf(len); 3848 if (!m || m->m_next) { /*XXX*/ 3849 if (m) 3850 m_freem(m); 3851 return NULL; 3852 } 3853 3854 p = mtod(m, struct sadb_sa *); 3855 3856 memset(p, 0, len); 3857 p->sadb_sa_len = PFKEY_UNIT64(len); 3858 p->sadb_sa_exttype = SADB_EXT_SA; 3859 p->sadb_sa_spi = sav->spi; 3860 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3861 p->sadb_sa_state = sav->state; 3862 p->sadb_sa_auth = sav->alg_auth; 3863 p->sadb_sa_encrypt = sav->alg_enc; 3864 p->sadb_sa_flags = sav->flags; 3865 3866 return m; 3867 } 3868 3869 /* 3870 * set data into sadb_address. 3871 */ 3872 static struct mbuf * 3873 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3874 u_int8_t prefixlen, u_int16_t ul_proto) 3875 { 3876 struct mbuf *m; 3877 struct sadb_address *p; 3878 size_t len; 3879 3880 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3881 PFKEY_ALIGN8(saddr->sa_len); 3882 m = key_alloc_mbuf(len); 3883 if (!m || m->m_next) { /*XXX*/ 3884 if (m) 3885 m_freem(m); 3886 return NULL; 3887 } 3888 3889 p = mtod(m, struct sadb_address *); 3890 3891 memset(p, 0, len); 3892 p->sadb_address_len = PFKEY_UNIT64(len); 3893 p->sadb_address_exttype = exttype; 3894 p->sadb_address_proto = ul_proto; 3895 if (prefixlen == FULLMASK) { 3896 switch (saddr->sa_family) { 3897 case AF_INET: 3898 prefixlen = sizeof(struct in_addr) << 3; 3899 break; 3900 case AF_INET6: 3901 prefixlen = sizeof(struct in6_addr) << 3; 3902 break; 3903 default: 3904 ; /*XXX*/ 3905 } 3906 } 3907 p->sadb_address_prefixlen = prefixlen; 3908 p->sadb_address_reserved = 0; 3909 3910 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3911 saddr, saddr->sa_len); 3912 3913 return m; 3914 } 3915 3916 #if 0 3917 /* 3918 * set data into sadb_ident. 3919 */ 3920 static struct mbuf * 3921 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3922 void *string, int stringlen, u_int64_t id) 3923 { 3924 struct mbuf *m; 3925 struct sadb_ident *p; 3926 size_t len; 3927 3928 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3929 m = key_alloc_mbuf(len); 3930 if (!m || m->m_next) { /*XXX*/ 3931 if (m) 3932 m_freem(m); 3933 return NULL; 3934 } 3935 3936 p = mtod(m, struct sadb_ident *); 3937 3938 memset(p, 0, len); 3939 p->sadb_ident_len = PFKEY_UNIT64(len); 3940 p->sadb_ident_exttype = exttype; 3941 p->sadb_ident_type = idtype; 3942 p->sadb_ident_reserved = 0; 3943 p->sadb_ident_id = id; 3944 3945 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3946 string, stringlen); 3947 3948 return m; 3949 } 3950 #endif 3951 3952 /* 3953 * set data into sadb_x_sa2. 3954 */ 3955 static struct mbuf * 3956 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 3957 { 3958 struct mbuf *m; 3959 struct sadb_x_sa2 *p; 3960 size_t len; 3961 3962 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3963 m = key_alloc_mbuf(len); 3964 if (!m || m->m_next) { /*XXX*/ 3965 if (m) 3966 m_freem(m); 3967 return NULL; 3968 } 3969 3970 p = mtod(m, struct sadb_x_sa2 *); 3971 3972 memset(p, 0, len); 3973 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3974 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3975 p->sadb_x_sa2_mode = mode; 3976 p->sadb_x_sa2_reserved1 = 0; 3977 p->sadb_x_sa2_reserved2 = 0; 3978 p->sadb_x_sa2_sequence = seq; 3979 p->sadb_x_sa2_reqid = reqid; 3980 3981 return m; 3982 } 3983 3984 /* 3985 * set data into sadb_x_policy 3986 */ 3987 static struct mbuf * 3988 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3989 { 3990 struct mbuf *m; 3991 struct sadb_x_policy *p; 3992 size_t len; 3993 3994 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3995 m = key_alloc_mbuf(len); 3996 if (!m || m->m_next) { /*XXX*/ 3997 if (m) 3998 m_freem(m); 3999 return NULL; 4000 } 4001 4002 p = mtod(m, struct sadb_x_policy *); 4003 4004 memset(p, 0, len); 4005 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4006 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4007 p->sadb_x_policy_type = type; 4008 p->sadb_x_policy_dir = dir; 4009 p->sadb_x_policy_id = id; 4010 4011 return m; 4012 } 4013 4014 /* %%% utilities */ 4015 /* 4016 * copy a buffer into the new buffer allocated. 4017 */ 4018 static void * 4019 key_newbuf(const void *src, u_int len) 4020 { 4021 void *new; 4022 4023 new = kmem_alloc(len, KM_SLEEP); 4024 memcpy(new, src, len); 4025 4026 return new; 4027 } 4028 4029 /* compare my own address 4030 * OUT: 1: true, i.e. my address. 4031 * 0: false 4032 */ 4033 int 4034 key_ismyaddr(const struct sockaddr *sa) 4035 { 4036 #ifdef INET 4037 const struct sockaddr_in *sin; 4038 const struct in_ifaddr *ia; 4039 int s; 4040 #endif 4041 4042 KASSERT(sa != NULL); 4043 4044 switch (sa->sa_family) { 4045 #ifdef INET 4046 case AF_INET: 4047 sin = (const struct sockaddr_in *)sa; 4048 s = pserialize_read_enter(); 4049 IN_ADDRLIST_READER_FOREACH(ia) { 4050 if (sin->sin_family == ia->ia_addr.sin_family && 4051 sin->sin_len == ia->ia_addr.sin_len && 4052 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4053 { 4054 pserialize_read_exit(s); 4055 return 1; 4056 } 4057 } 4058 pserialize_read_exit(s); 4059 break; 4060 #endif 4061 #ifdef INET6 4062 case AF_INET6: 4063 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4064 #endif 4065 } 4066 4067 return 0; 4068 } 4069 4070 #ifdef INET6 4071 /* 4072 * compare my own address for IPv6. 4073 * 1: ours 4074 * 0: other 4075 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4076 */ 4077 #include <netinet6/in6_var.h> 4078 4079 static int 4080 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4081 { 4082 struct in6_ifaddr *ia; 4083 int s; 4084 struct psref psref; 4085 int bound; 4086 int ours = 1; 4087 4088 bound = curlwp_bind(); 4089 s = pserialize_read_enter(); 4090 IN6_ADDRLIST_READER_FOREACH(ia) { 4091 bool ingroup; 4092 4093 if (key_sockaddr_match((const struct sockaddr *)&sin6, 4094 (const struct sockaddr *)&ia->ia_addr, 0)) { 4095 pserialize_read_exit(s); 4096 goto ours; 4097 } 4098 ia6_acquire(ia, &psref); 4099 pserialize_read_exit(s); 4100 4101 /* 4102 * XXX Multicast 4103 * XXX why do we care about multlicast here while we don't care 4104 * about IPv4 multicast?? 4105 * XXX scope 4106 */ 4107 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4108 if (ingroup) { 4109 ia6_release(ia, &psref); 4110 goto ours; 4111 } 4112 4113 s = pserialize_read_enter(); 4114 ia6_release(ia, &psref); 4115 } 4116 pserialize_read_exit(s); 4117 4118 /* loopback, just for safety */ 4119 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4120 goto ours; 4121 4122 ours = 0; 4123 ours: 4124 curlwp_bindx(bound); 4125 4126 return ours; 4127 } 4128 #endif /*INET6*/ 4129 4130 /* 4131 * compare two secasindex structure. 4132 * flag can specify to compare 2 saidxes. 4133 * compare two secasindex structure without both mode and reqid. 4134 * don't compare port. 4135 * IN: 4136 * saidx0: source, it can be in SAD. 4137 * saidx1: object. 4138 * OUT: 4139 * 1 : equal 4140 * 0 : not equal 4141 */ 4142 static int 4143 key_saidx_match( 4144 const struct secasindex *saidx0, 4145 const struct secasindex *saidx1, 4146 int flag) 4147 { 4148 int chkport; 4149 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4150 4151 /* sanity */ 4152 if (saidx0 == NULL && saidx1 == NULL) 4153 return 1; 4154 4155 if (saidx0 == NULL || saidx1 == NULL) 4156 return 0; 4157 4158 if (saidx0->proto != saidx1->proto) 4159 return 0; 4160 4161 if (flag == CMP_EXACTLY) { 4162 if (saidx0->mode != saidx1->mode) 4163 return 0; 4164 if (saidx0->reqid != saidx1->reqid) 4165 return 0; 4166 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4167 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4168 return 0; 4169 } else { 4170 4171 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4172 if (flag == CMP_MODE_REQID ||flag == CMP_REQID) { 4173 /* 4174 * If reqid of SPD is non-zero, unique SA is required. 4175 * The result must be of same reqid in this case. 4176 */ 4177 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4178 return 0; 4179 } 4180 4181 if (flag == CMP_MODE_REQID) { 4182 if (saidx0->mode != IPSEC_MODE_ANY && 4183 saidx0->mode != saidx1->mode) 4184 return 0; 4185 } 4186 4187 4188 sa0src = &saidx0->src.sa; 4189 sa0dst = &saidx0->dst.sa; 4190 sa1src = &saidx1->src.sa; 4191 sa1dst = &saidx1->dst.sa; 4192 /* 4193 * If NAT-T is enabled, check ports for tunnel mode. 4194 * Don't do it for transport mode, as there is no 4195 * port information available in the SP. 4196 * Also don't check ports if they are set to zero 4197 * in the SPD: This means we have a non-generated 4198 * SPD which can't know UDP ports. 4199 */ 4200 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4201 chkport = PORT_LOOSE; 4202 else 4203 chkport = PORT_NONE; 4204 4205 if (!key_sockaddr_match(sa0src, sa1src, chkport)) { 4206 return 0; 4207 } 4208 if (!key_sockaddr_match(sa0dst, sa1dst, chkport)) { 4209 return 0; 4210 } 4211 } 4212 4213 return 1; 4214 } 4215 4216 /* 4217 * compare two secindex structure exactly. 4218 * IN: 4219 * spidx0: source, it is often in SPD. 4220 * spidx1: object, it is often from PFKEY message. 4221 * OUT: 4222 * 1 : equal 4223 * 0 : not equal 4224 */ 4225 static int 4226 key_spidx_match_exactly( 4227 const struct secpolicyindex *spidx0, 4228 const struct secpolicyindex *spidx1) 4229 { 4230 /* sanity */ 4231 if (spidx0 == NULL && spidx1 == NULL) 4232 return 1; 4233 4234 if (spidx0 == NULL || spidx1 == NULL) 4235 return 0; 4236 4237 if (spidx0->prefs != spidx1->prefs || 4238 spidx0->prefd != spidx1->prefd || 4239 spidx0->ul_proto != spidx1->ul_proto) 4240 return 0; 4241 4242 return key_sockaddr_match(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) && 4243 key_sockaddr_match(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT); 4244 } 4245 4246 /* 4247 * compare two secindex structure with mask. 4248 * IN: 4249 * spidx0: source, it is often in SPD. 4250 * spidx1: object, it is often from IP header. 4251 * OUT: 4252 * 1 : equal 4253 * 0 : not equal 4254 */ 4255 static int 4256 key_spidx_match_withmask( 4257 const struct secpolicyindex *spidx0, 4258 const struct secpolicyindex *spidx1) 4259 { 4260 4261 KASSERT(spidx0 != NULL); 4262 KASSERT(spidx1 != NULL); 4263 4264 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4265 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4266 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4267 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4268 return 0; 4269 4270 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4271 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY && 4272 spidx0->ul_proto != spidx1->ul_proto) 4273 return 0; 4274 4275 switch (spidx0->src.sa.sa_family) { 4276 case AF_INET: 4277 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY && 4278 spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4279 return 0; 4280 if (!key_bb_match_withmask(&spidx0->src.sin.sin_addr, 4281 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4282 return 0; 4283 break; 4284 case AF_INET6: 4285 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY && 4286 spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4287 return 0; 4288 /* 4289 * scope_id check. if sin6_scope_id is 0, we regard it 4290 * as a wildcard scope, which matches any scope zone ID. 4291 */ 4292 if (spidx0->src.sin6.sin6_scope_id && 4293 spidx1->src.sin6.sin6_scope_id && 4294 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4295 return 0; 4296 if (!key_bb_match_withmask(&spidx0->src.sin6.sin6_addr, 4297 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4298 return 0; 4299 break; 4300 default: 4301 /* XXX */ 4302 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4303 return 0; 4304 break; 4305 } 4306 4307 switch (spidx0->dst.sa.sa_family) { 4308 case AF_INET: 4309 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY && 4310 spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4311 return 0; 4312 if (!key_bb_match_withmask(&spidx0->dst.sin.sin_addr, 4313 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4314 return 0; 4315 break; 4316 case AF_INET6: 4317 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY && 4318 spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4319 return 0; 4320 /* 4321 * scope_id check. if sin6_scope_id is 0, we regard it 4322 * as a wildcard scope, which matches any scope zone ID. 4323 */ 4324 if (spidx0->src.sin6.sin6_scope_id && 4325 spidx1->src.sin6.sin6_scope_id && 4326 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4327 return 0; 4328 if (!key_bb_match_withmask(&spidx0->dst.sin6.sin6_addr, 4329 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4330 return 0; 4331 break; 4332 default: 4333 /* XXX */ 4334 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4335 return 0; 4336 break; 4337 } 4338 4339 /* XXX Do we check other field ? e.g. flowinfo */ 4340 4341 return 1; 4342 } 4343 4344 /* returns 0 on match */ 4345 static int 4346 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4347 { 4348 switch (howport) { 4349 case PORT_NONE: 4350 return 0; 4351 case PORT_LOOSE: 4352 if (port1 == 0 || port2 == 0) 4353 return 0; 4354 /*FALLTHROUGH*/ 4355 case PORT_STRICT: 4356 if (port1 != port2) { 4357 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4358 "port fail %d != %d\n", port1, port2); 4359 return 1; 4360 } 4361 return 0; 4362 default: 4363 KASSERT(0); 4364 return 1; 4365 } 4366 } 4367 4368 /* returns 1 on match */ 4369 static int 4370 key_sockaddr_match( 4371 const struct sockaddr *sa1, 4372 const struct sockaddr *sa2, 4373 int howport) 4374 { 4375 const struct sockaddr_in *sin1, *sin2; 4376 const struct sockaddr_in6 *sin61, *sin62; 4377 4378 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4379 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4380 "fam/len fail %d != %d || %d != %d\n", 4381 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4382 sa2->sa_len); 4383 return 0; 4384 } 4385 4386 switch (sa1->sa_family) { 4387 case AF_INET: 4388 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4389 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4390 "len fail %d != %zu\n", 4391 sa1->sa_len, sizeof(struct sockaddr_in)); 4392 return 0; 4393 } 4394 sin1 = (const struct sockaddr_in *)sa1; 4395 sin2 = (const struct sockaddr_in *)sa2; 4396 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4397 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4398 "addr fail %#x != %#x\n", 4399 sin1->sin_addr.s_addr, sin2->sin_addr.s_addr); 4400 return 0; 4401 } 4402 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4403 return 0; 4404 } 4405 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4406 "addr success %#x[%d] == %#x[%d]\n", 4407 sin1->sin_addr.s_addr, sin1->sin_port, 4408 sin2->sin_addr.s_addr, sin2->sin_port); 4409 break; 4410 case AF_INET6: 4411 sin61 = (const struct sockaddr_in6 *)sa1; 4412 sin62 = (const struct sockaddr_in6 *)sa2; 4413 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4414 return 0; /*EINVAL*/ 4415 4416 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4417 return 0; 4418 } 4419 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4420 return 0; 4421 } 4422 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4423 return 0; 4424 } 4425 break; 4426 default: 4427 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4428 return 0; 4429 break; 4430 } 4431 4432 return 1; 4433 } 4434 4435 /* 4436 * compare two buffers with mask. 4437 * IN: 4438 * addr1: source 4439 * addr2: object 4440 * bits: Number of bits to compare 4441 * OUT: 4442 * 1 : equal 4443 * 0 : not equal 4444 */ 4445 static int 4446 key_bb_match_withmask(const void *a1, const void *a2, u_int bits) 4447 { 4448 const unsigned char *p1 = a1; 4449 const unsigned char *p2 = a2; 4450 4451 /* XXX: This could be considerably faster if we compare a word 4452 * at a time, but it is complicated on LSB Endian machines */ 4453 4454 /* Handle null pointers */ 4455 if (p1 == NULL || p2 == NULL) 4456 return (p1 == p2); 4457 4458 while (bits >= 8) { 4459 if (*p1++ != *p2++) 4460 return 0; 4461 bits -= 8; 4462 } 4463 4464 if (bits > 0) { 4465 u_int8_t mask = ~((1<<(8-bits))-1); 4466 if ((*p1 & mask) != (*p2 & mask)) 4467 return 0; 4468 } 4469 return 1; /* Match! */ 4470 } 4471 4472 /* 4473 * time handler. 4474 * scanning SPD and SAD to check status for each entries, 4475 * and do to remove or to expire. 4476 */ 4477 static void 4478 key_timehandler_work(struct work *wk, void *arg) 4479 { 4480 u_int dir; 4481 int s; 4482 time_t now = time_uptime; 4483 4484 s = splsoftnet(); 4485 mutex_enter(softnet_lock); 4486 4487 /* SPD */ 4488 { 4489 struct secpolicy *sp, *nextsp; 4490 4491 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4492 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 4493 if (sp->state == IPSEC_SPSTATE_DEAD) { 4494 key_sp_unlink(sp); /*XXX*/ 4495 4496 /* 'sp' dead; continue transfers to 4497 * 'sp = nextsp' 4498 */ 4499 continue; 4500 } 4501 4502 if (sp->lifetime == 0 && sp->validtime == 0) 4503 continue; 4504 4505 /* the deletion will occur next time */ 4506 if ((sp->lifetime && now - sp->created > sp->lifetime) || 4507 (sp->validtime && now - sp->lastused > sp->validtime)) { 4508 key_sp_dead(sp); 4509 key_spdexpire(sp); 4510 continue; 4511 } 4512 } 4513 } 4514 } 4515 4516 /* SAD */ 4517 { 4518 struct secashead *sah, *nextsah; 4519 struct secasvar *sav, *nextsav; 4520 4521 LIST_FOREACH_SAFE(sah, &sahtree, chain, nextsah) { 4522 /* if sah has been dead, then delete it and process next sah. */ 4523 if (sah->state == SADB_SASTATE_DEAD) { 4524 key_delsah(sah); 4525 continue; 4526 } 4527 4528 /* if LARVAL entry doesn't become MATURE, delete it. */ 4529 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], 4530 chain, nextsav) { 4531 if (now - sav->created > key_larval_lifetime) { 4532 KEY_FREESAV(&sav); 4533 } 4534 } 4535 4536 /* 4537 * check MATURE entry to start to send expire message 4538 * whether or not. 4539 */ 4540 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], 4541 chain, nextsav) { 4542 /* we don't need to check. */ 4543 if (sav->lft_s == NULL) 4544 continue; 4545 4546 /* sanity check */ 4547 if (sav->lft_c == NULL) { 4548 IPSECLOG(LOG_DEBUG, 4549 "There is no CURRENT time, why?\n"); 4550 continue; 4551 } 4552 4553 /* check SOFT lifetime */ 4554 if (sav->lft_s->sadb_lifetime_addtime != 0 && 4555 now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4556 /* 4557 * check SA to be used whether or not. 4558 * when SA hasn't been used, delete it. 4559 */ 4560 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4561 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4562 KEY_FREESAV(&sav); 4563 } else { 4564 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4565 /* 4566 * XXX If we keep to send expire 4567 * message in the status of 4568 * DYING. Do remove below code. 4569 */ 4570 key_expire(sav); 4571 } 4572 } 4573 /* check SOFT lifetime by bytes */ 4574 /* 4575 * XXX I don't know the way to delete this SA 4576 * when new SA is installed. Caution when it's 4577 * installed too big lifetime by time. 4578 */ 4579 else if (sav->lft_s->sadb_lifetime_bytes != 0 && 4580 sav->lft_s->sadb_lifetime_bytes < 4581 sav->lft_c->sadb_lifetime_bytes) { 4582 4583 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4584 /* 4585 * XXX If we keep to send expire 4586 * message in the status of 4587 * DYING. Do remove below code. 4588 */ 4589 key_expire(sav); 4590 } 4591 } 4592 4593 /* check DYING entry to change status to DEAD. */ 4594 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], 4595 chain, nextsav) { 4596 /* we don't need to check. */ 4597 if (sav->lft_h == NULL) 4598 continue; 4599 4600 /* sanity check */ 4601 if (sav->lft_c == NULL) { 4602 IPSECLOG(LOG_DEBUG, 4603 "There is no CURRENT time, why?\n"); 4604 continue; 4605 } 4606 4607 if (sav->lft_h->sadb_lifetime_addtime != 0 && 4608 now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4609 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4610 KEY_FREESAV(&sav); 4611 } 4612 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4613 else if (sav->lft_s != NULL 4614 && sav->lft_s->sadb_lifetime_addtime != 0 4615 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4616 /* 4617 * XXX: should be checked to be 4618 * installed the valid SA. 4619 */ 4620 4621 /* 4622 * If there is no SA then sending 4623 * expire message. 4624 */ 4625 key_expire(sav); 4626 } 4627 #endif 4628 /* check HARD lifetime by bytes */ 4629 else if (sav->lft_h->sadb_lifetime_bytes != 0 && 4630 sav->lft_h->sadb_lifetime_bytes < 4631 sav->lft_c->sadb_lifetime_bytes) { 4632 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4633 KEY_FREESAV(&sav); 4634 } 4635 } 4636 4637 /* delete entry in DEAD */ 4638 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], 4639 chain, nextsav) { 4640 /* sanity check */ 4641 if (sav->state != SADB_SASTATE_DEAD) { 4642 IPSECLOG(LOG_DEBUG, 4643 "invalid sav->state (queue: %d SA: %d): " 4644 "kill it anyway\n", 4645 SADB_SASTATE_DEAD, sav->state); 4646 } 4647 4648 /* 4649 * do not call key_freesav() here. 4650 * sav should already be freed, and sav->refcnt 4651 * shows other references to sav 4652 * (such as from SPD). 4653 */ 4654 } 4655 } 4656 } 4657 4658 #ifndef IPSEC_NONBLOCK_ACQUIRE 4659 /* ACQ tree */ 4660 { 4661 struct secacq *acq, *nextacq; 4662 4663 restart: 4664 mutex_enter(&key_mtx); 4665 LIST_FOREACH_SAFE(acq, &acqtree, chain, nextacq) { 4666 if (now - acq->created > key_blockacq_lifetime) { 4667 LIST_REMOVE(acq, chain); 4668 mutex_exit(&key_mtx); 4669 kmem_free(acq, sizeof(*acq)); 4670 goto restart; 4671 } 4672 } 4673 mutex_exit(&key_mtx); 4674 } 4675 #endif 4676 4677 #ifdef notyet 4678 /* SP ACQ tree */ 4679 { 4680 struct secspacq *acq, *nextacq; 4681 4682 LIST_FOREACH_SAFE(acq, &spacqtree, chain, nextacq) { 4683 if (now - acq->created > key_blockacq_lifetime) { 4684 KASSERT(__LIST_CHAINED(acq)); 4685 LIST_REMOVE(acq, chain); 4686 kmem_free(acq, sizeof(*acq)); 4687 } 4688 } 4689 } 4690 #endif 4691 4692 /* do exchange to tick time !! */ 4693 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4694 4695 mutex_exit(softnet_lock); 4696 splx(s); 4697 return; 4698 } 4699 4700 static void 4701 key_timehandler(void *arg) 4702 { 4703 4704 workqueue_enqueue(key_timehandler_wq, &key_timehandler_wk, NULL); 4705 } 4706 4707 u_long 4708 key_random(void) 4709 { 4710 u_long value; 4711 4712 key_randomfill(&value, sizeof(value)); 4713 return value; 4714 } 4715 4716 void 4717 key_randomfill(void *p, size_t l) 4718 { 4719 4720 cprng_fast(p, l); 4721 } 4722 4723 /* 4724 * map SADB_SATYPE_* to IPPROTO_*. 4725 * if satype == SADB_SATYPE then satype is mapped to ~0. 4726 * OUT: 4727 * 0: invalid satype. 4728 */ 4729 static u_int16_t 4730 key_satype2proto(u_int8_t satype) 4731 { 4732 switch (satype) { 4733 case SADB_SATYPE_UNSPEC: 4734 return IPSEC_PROTO_ANY; 4735 case SADB_SATYPE_AH: 4736 return IPPROTO_AH; 4737 case SADB_SATYPE_ESP: 4738 return IPPROTO_ESP; 4739 case SADB_X_SATYPE_IPCOMP: 4740 return IPPROTO_IPCOMP; 4741 case SADB_X_SATYPE_TCPSIGNATURE: 4742 return IPPROTO_TCP; 4743 default: 4744 return 0; 4745 } 4746 /* NOTREACHED */ 4747 } 4748 4749 /* 4750 * map IPPROTO_* to SADB_SATYPE_* 4751 * OUT: 4752 * 0: invalid protocol type. 4753 */ 4754 static u_int8_t 4755 key_proto2satype(u_int16_t proto) 4756 { 4757 switch (proto) { 4758 case IPPROTO_AH: 4759 return SADB_SATYPE_AH; 4760 case IPPROTO_ESP: 4761 return SADB_SATYPE_ESP; 4762 case IPPROTO_IPCOMP: 4763 return SADB_X_SATYPE_IPCOMP; 4764 case IPPROTO_TCP: 4765 return SADB_X_SATYPE_TCPSIGNATURE; 4766 default: 4767 return 0; 4768 } 4769 /* NOTREACHED */ 4770 } 4771 4772 static int 4773 key_setsecasidx(int proto, int mode, int reqid, 4774 const struct sockaddr *src, const struct sockaddr *dst, 4775 struct secasindex * saidx) 4776 { 4777 const union sockaddr_union *src_u = (const union sockaddr_union *)src; 4778 const union sockaddr_union *dst_u = (const union sockaddr_union *)dst; 4779 4780 /* sa len safety check */ 4781 if (key_checksalen(src_u) != 0) 4782 return -1; 4783 if (key_checksalen(dst_u) != 0) 4784 return -1; 4785 4786 memset(saidx, 0, sizeof(*saidx)); 4787 saidx->proto = proto; 4788 saidx->mode = mode; 4789 saidx->reqid = reqid; 4790 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4791 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4792 4793 key_porttosaddr(&((saidx)->src), 0); 4794 key_porttosaddr(&((saidx)->dst), 0); 4795 return 0; 4796 } 4797 4798 static void 4799 key_init_spidx_bymsghdr(struct secpolicyindex *spidx, 4800 const struct sadb_msghdr *mhp) 4801 { 4802 const struct sadb_address *src0, *dst0; 4803 const struct sockaddr *src, *dst; 4804 const struct sadb_x_policy *xpl0; 4805 4806 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 4807 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 4808 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4809 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4810 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 4811 4812 memset(spidx, 0, sizeof(*spidx)); 4813 spidx->dir = xpl0->sadb_x_policy_dir; 4814 spidx->prefs = src0->sadb_address_prefixlen; 4815 spidx->prefd = dst0->sadb_address_prefixlen; 4816 spidx->ul_proto = src0->sadb_address_proto; 4817 /* XXX boundary check against sa_len */ 4818 memcpy(&spidx->src, src, src->sa_len); 4819 memcpy(&spidx->dst, dst, dst->sa_len); 4820 } 4821 4822 /* %%% PF_KEY */ 4823 /* 4824 * SADB_GETSPI processing is to receive 4825 * <base, (SA2), src address, dst address, (SPI range)> 4826 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4827 * tree with the status of LARVAL, and send 4828 * <base, SA(*), address(SD)> 4829 * to the IKMPd. 4830 * 4831 * IN: mhp: pointer to the pointer to each header. 4832 * OUT: NULL if fail. 4833 * other if success, return pointer to the message to send. 4834 */ 4835 static int 4836 key_getspi(struct socket *so, struct mbuf *m, 4837 const struct sadb_msghdr *mhp) 4838 { 4839 const struct sockaddr *src, *dst; 4840 struct secasindex saidx; 4841 struct secashead *newsah; 4842 struct secasvar *newsav; 4843 u_int8_t proto; 4844 u_int32_t spi; 4845 u_int8_t mode; 4846 u_int16_t reqid; 4847 int error; 4848 4849 KASSERT(!cpu_softintr_p()); 4850 KASSERT(so != NULL); 4851 KASSERT(m != NULL); 4852 KASSERT(mhp != NULL); 4853 KASSERT(mhp->msg != NULL); 4854 4855 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4856 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4857 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4858 return key_senderror(so, m, EINVAL); 4859 } 4860 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4861 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4862 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4863 return key_senderror(so, m, EINVAL); 4864 } 4865 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4866 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4867 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4868 } else { 4869 mode = IPSEC_MODE_ANY; 4870 reqid = 0; 4871 } 4872 4873 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4874 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4875 4876 /* map satype to proto */ 4877 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 4878 if (proto == 0) { 4879 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 4880 return key_senderror(so, m, EINVAL); 4881 } 4882 4883 4884 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 4885 if (error != 0) 4886 return key_senderror(so, m, EINVAL); 4887 4888 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 4889 if (error != 0) 4890 return key_senderror(so, m, EINVAL); 4891 4892 /* SPI allocation */ 4893 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4894 &saidx); 4895 if (spi == 0) 4896 return key_senderror(so, m, EINVAL); 4897 4898 /* get a SA index */ 4899 newsah = key_getsah(&saidx); 4900 if (newsah == NULL) { 4901 /* create a new SA index */ 4902 newsah = key_newsah(&saidx); 4903 if (newsah == NULL) { 4904 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 4905 return key_senderror(so, m, ENOBUFS); 4906 } 4907 } 4908 4909 /* get a new SA */ 4910 /* XXX rewrite */ 4911 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4912 if (newsav == NULL) { 4913 /* XXX don't free new SA index allocated in above. */ 4914 return key_senderror(so, m, error); 4915 } 4916 4917 /* set spi */ 4918 newsav->spi = htonl(spi); 4919 4920 #ifndef IPSEC_NONBLOCK_ACQUIRE 4921 /* delete the entry in acqtree */ 4922 if (mhp->msg->sadb_msg_seq != 0) { 4923 struct secacq *acq; 4924 mutex_enter(&key_mtx); 4925 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 4926 if (acq != NULL) { 4927 /* reset counter in order to deletion by timehandler. */ 4928 acq->created = time_uptime; 4929 acq->count = 0; 4930 } 4931 mutex_exit(&key_mtx); 4932 } 4933 #endif 4934 4935 { 4936 struct mbuf *n, *nn; 4937 struct sadb_sa *m_sa; 4938 struct sadb_msg *newmsg; 4939 int off, len; 4940 4941 /* create new sadb_msg to reply. */ 4942 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4943 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4944 if (len > MCLBYTES) 4945 return key_senderror(so, m, ENOBUFS); 4946 4947 MGETHDR(n, M_DONTWAIT, MT_DATA); 4948 if (len > MHLEN) { 4949 MCLGET(n, M_DONTWAIT); 4950 if ((n->m_flags & M_EXT) == 0) { 4951 m_freem(n); 4952 n = NULL; 4953 } 4954 } 4955 if (!n) 4956 return key_senderror(so, m, ENOBUFS); 4957 4958 n->m_len = len; 4959 n->m_next = NULL; 4960 off = 0; 4961 4962 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4963 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4964 4965 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4966 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4967 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4968 m_sa->sadb_sa_spi = htonl(spi); 4969 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4970 4971 KASSERTMSG(off == len, "length inconsistency"); 4972 4973 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4974 SADB_EXT_ADDRESS_DST); 4975 if (!n->m_next) { 4976 m_freem(n); 4977 return key_senderror(so, m, ENOBUFS); 4978 } 4979 4980 if (n->m_len < sizeof(struct sadb_msg)) { 4981 n = m_pullup(n, sizeof(struct sadb_msg)); 4982 if (n == NULL) 4983 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4984 } 4985 4986 n->m_pkthdr.len = 0; 4987 for (nn = n; nn; nn = nn->m_next) 4988 n->m_pkthdr.len += nn->m_len; 4989 4990 newmsg = mtod(n, struct sadb_msg *); 4991 newmsg->sadb_msg_seq = newsav->seq; 4992 newmsg->sadb_msg_errno = 0; 4993 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4994 4995 m_freem(m); 4996 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4997 } 4998 } 4999 5000 /* 5001 * allocating new SPI 5002 * called by key_getspi(). 5003 * OUT: 5004 * 0: failure. 5005 * others: success. 5006 */ 5007 static u_int32_t 5008 key_do_getnewspi(const struct sadb_spirange *spirange, 5009 const struct secasindex *saidx) 5010 { 5011 u_int32_t newspi; 5012 u_int32_t spmin, spmax; 5013 int count = key_spi_trycnt; 5014 5015 /* set spi range to allocate */ 5016 if (spirange != NULL) { 5017 spmin = spirange->sadb_spirange_min; 5018 spmax = spirange->sadb_spirange_max; 5019 } else { 5020 spmin = key_spi_minval; 5021 spmax = key_spi_maxval; 5022 } 5023 /* IPCOMP needs 2-byte SPI */ 5024 if (saidx->proto == IPPROTO_IPCOMP) { 5025 u_int32_t t; 5026 if (spmin >= 0x10000) 5027 spmin = 0xffff; 5028 if (spmax >= 0x10000) 5029 spmax = 0xffff; 5030 if (spmin > spmax) { 5031 t = spmin; spmin = spmax; spmax = t; 5032 } 5033 } 5034 5035 if (spmin == spmax) { 5036 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5037 IPSECLOG(LOG_DEBUG, "SPI %u exists already.\n", spmin); 5038 return 0; 5039 } 5040 5041 count--; /* taking one cost. */ 5042 newspi = spmin; 5043 5044 } else { 5045 5046 /* init SPI */ 5047 newspi = 0; 5048 5049 /* when requesting to allocate spi ranged */ 5050 while (count--) { 5051 /* generate pseudo-random SPI value ranged. */ 5052 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5053 5054 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5055 break; 5056 } 5057 5058 if (count == 0 || newspi == 0) { 5059 IPSECLOG(LOG_DEBUG, "to allocate spi is failed.\n"); 5060 return 0; 5061 } 5062 } 5063 5064 /* statistics */ 5065 keystat.getspi_count = 5066 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5067 5068 return newspi; 5069 } 5070 5071 static int 5072 key_handle_natt_info(struct secasvar *sav, 5073 const struct sadb_msghdr *mhp) 5074 { 5075 const char *msg = "?" ; 5076 struct sadb_x_nat_t_type *type; 5077 struct sadb_x_nat_t_port *sport, *dport; 5078 struct sadb_address *iaddr, *raddr; 5079 struct sadb_x_nat_t_frag *frag; 5080 5081 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5082 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5083 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5084 return 0; 5085 5086 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5087 msg = "TYPE"; 5088 goto bad; 5089 } 5090 5091 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5092 msg = "SPORT"; 5093 goto bad; 5094 } 5095 5096 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5097 msg = "DPORT"; 5098 goto bad; 5099 } 5100 5101 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5102 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5103 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5104 msg = "OAI"; 5105 goto bad; 5106 } 5107 } 5108 5109 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5110 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5111 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5112 msg = "OAR"; 5113 goto bad; 5114 } 5115 } 5116 5117 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5118 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5119 msg = "FRAG"; 5120 goto bad; 5121 } 5122 } 5123 5124 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5125 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5126 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5127 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5128 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5129 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5130 5131 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5132 type->sadb_x_nat_t_type_type, 5133 ntohs(sport->sadb_x_nat_t_port_port), 5134 ntohs(dport->sadb_x_nat_t_port_port)); 5135 5136 sav->natt_type = type->sadb_x_nat_t_type_type; 5137 key_porttosaddr(&sav->sah->saidx.src, sport->sadb_x_nat_t_port_port); 5138 key_porttosaddr(&sav->sah->saidx.dst, dport->sadb_x_nat_t_port_port); 5139 if (frag) 5140 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5141 else 5142 sav->esp_frag = IP_MAXPACKET; 5143 5144 return 0; 5145 bad: 5146 IPSECLOG(LOG_DEBUG, "invalid message %s\n", msg); 5147 __USE(msg); 5148 return -1; 5149 } 5150 5151 /* Just update the IPSEC_NAT_T ports if present */ 5152 static int 5153 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5154 const struct sadb_msghdr *mhp) 5155 { 5156 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5157 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5158 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5159 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5160 5161 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5162 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5163 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5164 struct sadb_x_nat_t_type *type; 5165 struct sadb_x_nat_t_port *sport; 5166 struct sadb_x_nat_t_port *dport; 5167 5168 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5169 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5170 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5171 IPSECLOG(LOG_DEBUG, "invalid message\n"); 5172 return -1; 5173 } 5174 5175 type = (struct sadb_x_nat_t_type *) 5176 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5177 sport = (struct sadb_x_nat_t_port *) 5178 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5179 dport = (struct sadb_x_nat_t_port *) 5180 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5181 5182 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5183 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5184 5185 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5186 type->sadb_x_nat_t_type_type, 5187 ntohs(sport->sadb_x_nat_t_port_port), 5188 ntohs(dport->sadb_x_nat_t_port_port)); 5189 } 5190 5191 return 0; 5192 } 5193 5194 5195 /* 5196 * SADB_UPDATE processing 5197 * receive 5198 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5199 * key(AE), (identity(SD),) (sensitivity)> 5200 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5201 * and send 5202 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5203 * (identity(SD),) (sensitivity)> 5204 * to the ikmpd. 5205 * 5206 * m will always be freed. 5207 */ 5208 static int 5209 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5210 { 5211 struct sadb_sa *sa0; 5212 const struct sockaddr *src, *dst; 5213 struct secasindex saidx; 5214 struct secashead *sah; 5215 struct secasvar *sav; 5216 u_int16_t proto; 5217 u_int8_t mode; 5218 u_int16_t reqid; 5219 int error; 5220 5221 KASSERT(!cpu_softintr_p()); 5222 KASSERT(so != NULL); 5223 KASSERT(m != NULL); 5224 KASSERT(mhp != NULL); 5225 KASSERT(mhp->msg != NULL); 5226 5227 /* map satype to proto */ 5228 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5229 if (proto == 0) { 5230 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5231 return key_senderror(so, m, EINVAL); 5232 } 5233 5234 if (mhp->ext[SADB_EXT_SA] == NULL || 5235 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5236 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5237 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5238 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5239 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5240 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5241 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5242 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5243 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5244 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5245 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5246 return key_senderror(so, m, EINVAL); 5247 } 5248 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5249 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5250 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5251 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5252 return key_senderror(so, m, EINVAL); 5253 } 5254 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5255 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5256 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5257 } else { 5258 mode = IPSEC_MODE_ANY; 5259 reqid = 0; 5260 } 5261 /* XXX boundary checking for other extensions */ 5262 5263 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5264 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5265 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5266 5267 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5268 if (error != 0) 5269 return key_senderror(so, m, EINVAL); 5270 5271 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5272 if (error != 0) 5273 return key_senderror(so, m, EINVAL); 5274 5275 /* get a SA header */ 5276 sah = key_getsah(&saidx); 5277 if (sah == NULL) { 5278 IPSECLOG(LOG_DEBUG, "no SA index found.\n"); 5279 return key_senderror(so, m, ENOENT); 5280 } 5281 5282 /* set spidx if there */ 5283 /* XXX rewrite */ 5284 error = key_setident(sah, m, mhp); 5285 if (error) 5286 return key_senderror(so, m, error); 5287 5288 /* find a SA with sequence number. */ 5289 #ifdef IPSEC_DOSEQCHECK 5290 if (mhp->msg->sadb_msg_seq != 0) { 5291 sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq); 5292 if (sav == NULL) { 5293 IPSECLOG(LOG_DEBUG, 5294 "no larval SA with sequence %u exists.\n", 5295 mhp->msg->sadb_msg_seq); 5296 return key_senderror(so, m, ENOENT); 5297 } 5298 } 5299 #else 5300 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5301 if (sav == NULL) { 5302 IPSECLOG(LOG_DEBUG, "no such a SA found (spi:%u)\n", 5303 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5304 return key_senderror(so, m, EINVAL); 5305 } 5306 #endif 5307 5308 /* validity check */ 5309 if (sav->sah->saidx.proto != proto) { 5310 IPSECLOG(LOG_DEBUG, "protocol mismatched (DB=%u param=%u)\n", 5311 sav->sah->saidx.proto, proto); 5312 return key_senderror(so, m, EINVAL); 5313 } 5314 #ifdef IPSEC_DOSEQCHECK 5315 if (sav->spi != sa0->sadb_sa_spi) { 5316 IPSECLOG(LOG_DEBUG, "SPI mismatched (DB:%u param:%u)\n", 5317 (u_int32_t)ntohl(sav->spi), 5318 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5319 return key_senderror(so, m, EINVAL); 5320 } 5321 #endif 5322 if (sav->pid != mhp->msg->sadb_msg_pid) { 5323 IPSECLOG(LOG_DEBUG, "pid mismatched (DB:%u param:%u)\n", 5324 sav->pid, mhp->msg->sadb_msg_pid); 5325 return key_senderror(so, m, EINVAL); 5326 } 5327 5328 /* copy sav values */ 5329 error = key_setsaval(sav, m, mhp); 5330 if (error) { 5331 KEY_FREESAV(&sav); 5332 return key_senderror(so, m, error); 5333 } 5334 5335 error = key_handle_natt_info(sav,mhp); 5336 if (error != 0) 5337 return key_senderror(so, m, EINVAL); 5338 5339 /* check SA values to be mature. */ 5340 mhp->msg->sadb_msg_errno = key_mature(sav); 5341 if (mhp->msg->sadb_msg_errno != 0) { 5342 KEY_FREESAV(&sav); 5343 return key_senderror(so, m, 0); 5344 } 5345 5346 { 5347 struct mbuf *n; 5348 5349 /* set msg buf from mhp */ 5350 n = key_getmsgbuf_x1(m, mhp); 5351 if (n == NULL) { 5352 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5353 return key_senderror(so, m, ENOBUFS); 5354 } 5355 5356 m_freem(m); 5357 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5358 } 5359 } 5360 5361 /* 5362 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5363 * only called by key_update(). 5364 * OUT: 5365 * NULL : not found 5366 * others : found, pointer to a SA. 5367 */ 5368 #ifdef IPSEC_DOSEQCHECK 5369 static struct secasvar * 5370 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5371 { 5372 struct secasvar *sav; 5373 u_int state; 5374 5375 state = SADB_SASTATE_LARVAL; 5376 5377 /* search SAD with sequence number ? */ 5378 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5379 5380 KEY_CHKSASTATE(state, sav->state); 5381 5382 if (sav->seq == seq) { 5383 SA_ADDREF(sav); 5384 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5385 "DP cause refcnt++:%d SA:%p\n", 5386 sav->refcnt, sav); 5387 return sav; 5388 } 5389 } 5390 5391 return NULL; 5392 } 5393 #endif 5394 5395 /* 5396 * SADB_ADD processing 5397 * add an entry to SA database, when received 5398 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5399 * key(AE), (identity(SD),) (sensitivity)> 5400 * from the ikmpd, 5401 * and send 5402 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5403 * (identity(SD),) (sensitivity)> 5404 * to the ikmpd. 5405 * 5406 * IGNORE identity and sensitivity messages. 5407 * 5408 * m will always be freed. 5409 */ 5410 static int 5411 key_add(struct socket *so, struct mbuf *m, 5412 const struct sadb_msghdr *mhp) 5413 { 5414 struct sadb_sa *sa0; 5415 const struct sockaddr *src, *dst; 5416 struct secasindex saidx; 5417 struct secashead *newsah; 5418 struct secasvar *newsav; 5419 u_int16_t proto; 5420 u_int8_t mode; 5421 u_int16_t reqid; 5422 int error; 5423 5424 KASSERT(so != NULL); 5425 KASSERT(m != NULL); 5426 KASSERT(mhp != NULL); 5427 KASSERT(mhp->msg != NULL); 5428 5429 /* map satype to proto */ 5430 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5431 if (proto == 0) { 5432 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5433 return key_senderror(so, m, EINVAL); 5434 } 5435 5436 if (mhp->ext[SADB_EXT_SA] == NULL || 5437 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5438 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5439 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5440 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5441 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5442 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5443 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5444 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5445 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5446 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5447 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5448 return key_senderror(so, m, EINVAL); 5449 } 5450 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5451 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5452 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5453 /* XXX need more */ 5454 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5455 return key_senderror(so, m, EINVAL); 5456 } 5457 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5458 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5459 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5460 } else { 5461 mode = IPSEC_MODE_ANY; 5462 reqid = 0; 5463 } 5464 5465 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5466 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5467 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5468 5469 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5470 if (error != 0) 5471 return key_senderror(so, m, EINVAL); 5472 5473 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5474 if (error != 0) 5475 return key_senderror(so, m, EINVAL); 5476 5477 /* get a SA header */ 5478 newsah = key_getsah(&saidx); 5479 if (newsah == NULL) { 5480 /* create a new SA header */ 5481 newsah = key_newsah(&saidx); 5482 if (newsah == NULL) { 5483 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5484 return key_senderror(so, m, ENOBUFS); 5485 } 5486 } 5487 5488 /* set spidx if there */ 5489 /* XXX rewrite */ 5490 error = key_setident(newsah, m, mhp); 5491 if (error) { 5492 return key_senderror(so, m, error); 5493 } 5494 5495 /* create new SA entry. */ 5496 /* We can create new SA only if SPI is differenct. */ 5497 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5498 IPSECLOG(LOG_DEBUG, "SA already exists.\n"); 5499 return key_senderror(so, m, EEXIST); 5500 } 5501 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5502 if (newsav == NULL) { 5503 return key_senderror(so, m, error); 5504 } 5505 5506 error = key_handle_natt_info(newsav, mhp); 5507 if (error != 0) 5508 return key_senderror(so, m, EINVAL); 5509 5510 /* check SA values to be mature. */ 5511 error = key_mature(newsav); 5512 if (error != 0) { 5513 KEY_FREESAV(&newsav); 5514 return key_senderror(so, m, error); 5515 } 5516 5517 /* 5518 * don't call key_freesav() here, as we would like to keep the SA 5519 * in the database on success. 5520 */ 5521 5522 { 5523 struct mbuf *n; 5524 5525 /* set msg buf from mhp */ 5526 n = key_getmsgbuf_x1(m, mhp); 5527 if (n == NULL) { 5528 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5529 return key_senderror(so, m, ENOBUFS); 5530 } 5531 5532 m_freem(m); 5533 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5534 } 5535 } 5536 5537 /* m is retained */ 5538 static int 5539 key_setident(struct secashead *sah, struct mbuf *m, 5540 const struct sadb_msghdr *mhp) 5541 { 5542 const struct sadb_ident *idsrc, *iddst; 5543 int idsrclen, iddstlen; 5544 5545 KASSERT(!cpu_softintr_p()); 5546 KASSERT(sah != NULL); 5547 KASSERT(m != NULL); 5548 KASSERT(mhp != NULL); 5549 KASSERT(mhp->msg != NULL); 5550 5551 /* 5552 * Can be called with an existing sah from key_update(). 5553 */ 5554 if (sah->idents != NULL) { 5555 kmem_free(sah->idents, sah->idents_len); 5556 sah->idents = NULL; 5557 sah->idents_len = 0; 5558 } 5559 if (sah->identd != NULL) { 5560 kmem_free(sah->identd, sah->identd_len); 5561 sah->identd = NULL; 5562 sah->identd_len = 0; 5563 } 5564 5565 /* don't make buffer if not there */ 5566 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5567 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5568 sah->idents = NULL; 5569 sah->identd = NULL; 5570 return 0; 5571 } 5572 5573 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5574 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5575 IPSECLOG(LOG_DEBUG, "invalid identity.\n"); 5576 return EINVAL; 5577 } 5578 5579 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5580 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5581 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5582 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5583 5584 /* validity check */ 5585 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5586 IPSECLOG(LOG_DEBUG, "ident type mismatch.\n"); 5587 return EINVAL; 5588 } 5589 5590 switch (idsrc->sadb_ident_type) { 5591 case SADB_IDENTTYPE_PREFIX: 5592 case SADB_IDENTTYPE_FQDN: 5593 case SADB_IDENTTYPE_USERFQDN: 5594 default: 5595 /* XXX do nothing */ 5596 sah->idents = NULL; 5597 sah->identd = NULL; 5598 return 0; 5599 } 5600 5601 /* make structure */ 5602 sah->idents = kmem_alloc(idsrclen, KM_SLEEP); 5603 sah->idents_len = idsrclen; 5604 sah->identd = kmem_alloc(iddstlen, KM_SLEEP); 5605 sah->identd_len = iddstlen; 5606 memcpy(sah->idents, idsrc, idsrclen); 5607 memcpy(sah->identd, iddst, iddstlen); 5608 5609 return 0; 5610 } 5611 5612 /* 5613 * m will not be freed on return. 5614 * it is caller's responsibility to free the result. 5615 */ 5616 static struct mbuf * 5617 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5618 { 5619 struct mbuf *n; 5620 5621 KASSERT(m != NULL); 5622 KASSERT(mhp != NULL); 5623 KASSERT(mhp->msg != NULL); 5624 5625 /* create new sadb_msg to reply. */ 5626 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5627 SADB_EXT_SA, SADB_X_EXT_SA2, 5628 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5629 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5630 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5631 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5632 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5633 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5634 if (!n) 5635 return NULL; 5636 5637 if (n->m_len < sizeof(struct sadb_msg)) { 5638 n = m_pullup(n, sizeof(struct sadb_msg)); 5639 if (n == NULL) 5640 return NULL; 5641 } 5642 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5643 mtod(n, struct sadb_msg *)->sadb_msg_len = 5644 PFKEY_UNIT64(n->m_pkthdr.len); 5645 5646 return n; 5647 } 5648 5649 static int key_delete_all (struct socket *, struct mbuf *, 5650 const struct sadb_msghdr *, u_int16_t); 5651 5652 /* 5653 * SADB_DELETE processing 5654 * receive 5655 * <base, SA(*), address(SD)> 5656 * from the ikmpd, and set SADB_SASTATE_DEAD, 5657 * and send, 5658 * <base, SA(*), address(SD)> 5659 * to the ikmpd. 5660 * 5661 * m will always be freed. 5662 */ 5663 static int 5664 key_delete(struct socket *so, struct mbuf *m, 5665 const struct sadb_msghdr *mhp) 5666 { 5667 struct sadb_sa *sa0; 5668 const struct sockaddr *src, *dst; 5669 struct secasindex saidx; 5670 struct secashead *sah; 5671 struct secasvar *sav = NULL; 5672 u_int16_t proto; 5673 int error; 5674 5675 KASSERT(so != NULL); 5676 KASSERT(m != NULL); 5677 KASSERT(mhp != NULL); 5678 KASSERT(mhp->msg != NULL); 5679 5680 /* map satype to proto */ 5681 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5682 if (proto == 0) { 5683 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5684 return key_senderror(so, m, EINVAL); 5685 } 5686 5687 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5688 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5689 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5690 return key_senderror(so, m, EINVAL); 5691 } 5692 5693 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5694 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5695 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5696 return key_senderror(so, m, EINVAL); 5697 } 5698 5699 if (mhp->ext[SADB_EXT_SA] == NULL) { 5700 /* 5701 * Caller wants us to delete all non-LARVAL SAs 5702 * that match the src/dst. This is used during 5703 * IKE INITIAL-CONTACT. 5704 */ 5705 IPSECLOG(LOG_DEBUG, "doing delete all.\n"); 5706 return key_delete_all(so, m, mhp, proto); 5707 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5708 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5709 return key_senderror(so, m, EINVAL); 5710 } 5711 5712 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5713 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5714 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5715 5716 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5717 if (error != 0) 5718 return key_senderror(so, m, EINVAL); 5719 5720 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5721 if (error != 0) 5722 return key_senderror(so, m, EINVAL); 5723 5724 /* get a SA header */ 5725 LIST_FOREACH(sah, &sahtree, chain) { 5726 if (sah->state == SADB_SASTATE_DEAD) 5727 continue; 5728 if (!key_saidx_match(&sah->saidx, &saidx, CMP_HEAD)) 5729 continue; 5730 5731 /* get a SA with SPI. */ 5732 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5733 if (sav) 5734 break; 5735 } 5736 if (sah == NULL) { 5737 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5738 return key_senderror(so, m, ENOENT); 5739 } 5740 5741 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5742 KEY_FREESAV(&sav); 5743 5744 { 5745 struct mbuf *n; 5746 struct sadb_msg *newmsg; 5747 5748 /* create new sadb_msg to reply. */ 5749 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5750 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5751 if (!n) 5752 return key_senderror(so, m, ENOBUFS); 5753 5754 if (n->m_len < sizeof(struct sadb_msg)) { 5755 n = m_pullup(n, sizeof(struct sadb_msg)); 5756 if (n == NULL) 5757 return key_senderror(so, m, ENOBUFS); 5758 } 5759 newmsg = mtod(n, struct sadb_msg *); 5760 newmsg->sadb_msg_errno = 0; 5761 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5762 5763 m_freem(m); 5764 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5765 } 5766 } 5767 5768 /* 5769 * delete all SAs for src/dst. Called from key_delete(). 5770 */ 5771 static int 5772 key_delete_all(struct socket *so, struct mbuf *m, 5773 const struct sadb_msghdr *mhp, u_int16_t proto) 5774 { 5775 const struct sockaddr *src, *dst; 5776 struct secasindex saidx; 5777 struct secashead *sah; 5778 struct secasvar *sav, *nextsav; 5779 u_int state; 5780 int error; 5781 5782 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5783 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5784 5785 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5786 if (error != 0) 5787 return key_senderror(so, m, EINVAL); 5788 5789 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5790 if (error != 0) 5791 return key_senderror(so, m, EINVAL); 5792 5793 LIST_FOREACH(sah, &sahtree, chain) { 5794 if (sah->state == SADB_SASTATE_DEAD) 5795 continue; 5796 if (!key_saidx_match(&sah->saidx, &saidx, CMP_HEAD)) 5797 continue; 5798 5799 /* Delete all non-LARVAL SAs. */ 5800 SASTATE_ALIVE_FOREACH(state) { 5801 if (state == SADB_SASTATE_LARVAL) 5802 continue; 5803 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 5804 nextsav) { 5805 /* sanity check */ 5806 if (sav->state != state) { 5807 IPSECLOG(LOG_DEBUG, 5808 "invalid sav->state " 5809 "(queue: %d SA: %d)\n", 5810 state, sav->state); 5811 continue; 5812 } 5813 5814 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5815 KEY_FREESAV(&sav); 5816 } 5817 } 5818 } 5819 { 5820 struct mbuf *n; 5821 struct sadb_msg *newmsg; 5822 5823 /* create new sadb_msg to reply. */ 5824 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5825 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5826 if (!n) 5827 return key_senderror(so, m, ENOBUFS); 5828 5829 if (n->m_len < sizeof(struct sadb_msg)) { 5830 n = m_pullup(n, sizeof(struct sadb_msg)); 5831 if (n == NULL) 5832 return key_senderror(so, m, ENOBUFS); 5833 } 5834 newmsg = mtod(n, struct sadb_msg *); 5835 newmsg->sadb_msg_errno = 0; 5836 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5837 5838 m_freem(m); 5839 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5840 } 5841 } 5842 5843 /* 5844 * SADB_GET processing 5845 * receive 5846 * <base, SA(*), address(SD)> 5847 * from the ikmpd, and get a SP and a SA to respond, 5848 * and send, 5849 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5850 * (identity(SD),) (sensitivity)> 5851 * to the ikmpd. 5852 * 5853 * m will always be freed. 5854 */ 5855 static int 5856 key_get(struct socket *so, struct mbuf *m, 5857 const struct sadb_msghdr *mhp) 5858 { 5859 struct sadb_sa *sa0; 5860 const struct sockaddr *src, *dst; 5861 struct secasindex saidx; 5862 struct secashead *sah; 5863 struct secasvar *sav = NULL; 5864 u_int16_t proto; 5865 int error; 5866 5867 KASSERT(so != NULL); 5868 KASSERT(m != NULL); 5869 KASSERT(mhp != NULL); 5870 KASSERT(mhp->msg != NULL); 5871 5872 /* map satype to proto */ 5873 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5874 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5875 return key_senderror(so, m, EINVAL); 5876 } 5877 5878 if (mhp->ext[SADB_EXT_SA] == NULL || 5879 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5880 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5881 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5882 return key_senderror(so, m, EINVAL); 5883 } 5884 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5885 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5886 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5887 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5888 return key_senderror(so, m, EINVAL); 5889 } 5890 5891 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5892 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5893 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5894 5895 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5896 if (error != 0) 5897 return key_senderror(so, m, EINVAL); 5898 5899 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5900 if (error != 0) 5901 return key_senderror(so, m, EINVAL); 5902 5903 /* get a SA header */ 5904 LIST_FOREACH(sah, &sahtree, chain) { 5905 if (sah->state == SADB_SASTATE_DEAD) 5906 continue; 5907 if (!key_saidx_match(&sah->saidx, &saidx, CMP_HEAD)) 5908 continue; 5909 5910 /* get a SA with SPI. */ 5911 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5912 if (sav) 5913 break; 5914 } 5915 if (sah == NULL) { 5916 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5917 return key_senderror(so, m, ENOENT); 5918 } 5919 5920 { 5921 struct mbuf *n; 5922 u_int8_t satype; 5923 5924 /* map proto to satype */ 5925 satype = key_proto2satype(sah->saidx.proto); 5926 if (satype == 0) { 5927 IPSECLOG(LOG_DEBUG, "there was invalid proto in SAD.\n"); 5928 return key_senderror(so, m, EINVAL); 5929 } 5930 5931 /* create new sadb_msg to reply. */ 5932 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5933 mhp->msg->sadb_msg_pid); 5934 if (!n) 5935 return key_senderror(so, m, ENOBUFS); 5936 5937 m_freem(m); 5938 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5939 } 5940 } 5941 5942 /* XXX make it sysctl-configurable? */ 5943 static void 5944 key_getcomb_setlifetime(struct sadb_comb *comb) 5945 { 5946 5947 comb->sadb_comb_soft_allocations = 1; 5948 comb->sadb_comb_hard_allocations = 1; 5949 comb->sadb_comb_soft_bytes = 0; 5950 comb->sadb_comb_hard_bytes = 0; 5951 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5952 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5953 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5954 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5955 } 5956 5957 /* 5958 * XXX reorder combinations by preference 5959 * XXX no idea if the user wants ESP authentication or not 5960 */ 5961 static struct mbuf * 5962 key_getcomb_esp(void) 5963 { 5964 struct sadb_comb *comb; 5965 const struct enc_xform *algo; 5966 struct mbuf *result = NULL, *m, *n; 5967 int encmin; 5968 int i, off, o; 5969 int totlen; 5970 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5971 5972 m = NULL; 5973 for (i = 1; i <= SADB_EALG_MAX; i++) { 5974 algo = esp_algorithm_lookup(i); 5975 if (algo == NULL) 5976 continue; 5977 5978 /* discard algorithms with key size smaller than system min */ 5979 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5980 continue; 5981 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5982 encmin = ipsec_esp_keymin; 5983 else 5984 encmin = _BITS(algo->minkey); 5985 5986 if (ipsec_esp_auth) 5987 m = key_getcomb_ah(); 5988 else { 5989 KASSERTMSG(l <= MLEN, 5990 "l=%u > MLEN=%lu", l, (u_long) MLEN); 5991 MGET(m, M_DONTWAIT, MT_DATA); 5992 if (m) { 5993 M_ALIGN(m, l); 5994 m->m_len = l; 5995 m->m_next = NULL; 5996 memset(mtod(m, void *), 0, m->m_len); 5997 } 5998 } 5999 if (!m) 6000 goto fail; 6001 6002 totlen = 0; 6003 for (n = m; n; n = n->m_next) 6004 totlen += n->m_len; 6005 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 6006 6007 for (off = 0; off < totlen; off += l) { 6008 n = m_pulldown(m, off, l, &o); 6009 if (!n) { 6010 /* m is already freed */ 6011 goto fail; 6012 } 6013 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6014 memset(comb, 0, sizeof(*comb)); 6015 key_getcomb_setlifetime(comb); 6016 comb->sadb_comb_encrypt = i; 6017 comb->sadb_comb_encrypt_minbits = encmin; 6018 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6019 } 6020 6021 if (!result) 6022 result = m; 6023 else 6024 m_cat(result, m); 6025 } 6026 6027 return result; 6028 6029 fail: 6030 if (result) 6031 m_freem(result); 6032 return NULL; 6033 } 6034 6035 static void 6036 key_getsizes_ah(const struct auth_hash *ah, int alg, 6037 u_int16_t* ksmin, u_int16_t* ksmax) 6038 { 6039 *ksmin = *ksmax = ah->keysize; 6040 if (ah->keysize == 0) { 6041 /* 6042 * Transform takes arbitrary key size but algorithm 6043 * key size is restricted. Enforce this here. 6044 */ 6045 switch (alg) { 6046 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6047 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6048 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 6049 default: 6050 IPSECLOG(LOG_DEBUG, "unknown AH algorithm %u\n", alg); 6051 break; 6052 } 6053 } 6054 } 6055 6056 /* 6057 * XXX reorder combinations by preference 6058 */ 6059 static struct mbuf * 6060 key_getcomb_ah(void) 6061 { 6062 struct sadb_comb *comb; 6063 const struct auth_hash *algo; 6064 struct mbuf *m; 6065 u_int16_t minkeysize, maxkeysize; 6066 int i; 6067 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6068 6069 m = NULL; 6070 for (i = 1; i <= SADB_AALG_MAX; i++) { 6071 #if 1 6072 /* we prefer HMAC algorithms, not old algorithms */ 6073 if (i != SADB_AALG_SHA1HMAC && 6074 i != SADB_AALG_MD5HMAC && 6075 i != SADB_X_AALG_SHA2_256 && 6076 i != SADB_X_AALG_SHA2_384 && 6077 i != SADB_X_AALG_SHA2_512) 6078 continue; 6079 #endif 6080 algo = ah_algorithm_lookup(i); 6081 if (!algo) 6082 continue; 6083 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6084 /* discard algorithms with key size smaller than system min */ 6085 if (_BITS(minkeysize) < ipsec_ah_keymin) 6086 continue; 6087 6088 if (!m) { 6089 KASSERTMSG(l <= MLEN, 6090 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6091 MGET(m, M_DONTWAIT, MT_DATA); 6092 if (m) { 6093 M_ALIGN(m, l); 6094 m->m_len = l; 6095 m->m_next = NULL; 6096 } 6097 } else 6098 M_PREPEND(m, l, M_DONTWAIT); 6099 if (!m) 6100 return NULL; 6101 6102 comb = mtod(m, struct sadb_comb *); 6103 memset(comb, 0, sizeof(*comb)); 6104 key_getcomb_setlifetime(comb); 6105 comb->sadb_comb_auth = i; 6106 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6107 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6108 } 6109 6110 return m; 6111 } 6112 6113 /* 6114 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6115 * XXX reorder combinations by preference 6116 */ 6117 static struct mbuf * 6118 key_getcomb_ipcomp(void) 6119 { 6120 struct sadb_comb *comb; 6121 const struct comp_algo *algo; 6122 struct mbuf *m; 6123 int i; 6124 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6125 6126 m = NULL; 6127 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6128 algo = ipcomp_algorithm_lookup(i); 6129 if (!algo) 6130 continue; 6131 6132 if (!m) { 6133 KASSERTMSG(l <= MLEN, 6134 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6135 MGET(m, M_DONTWAIT, MT_DATA); 6136 if (m) { 6137 M_ALIGN(m, l); 6138 m->m_len = l; 6139 m->m_next = NULL; 6140 } 6141 } else 6142 M_PREPEND(m, l, M_DONTWAIT); 6143 if (!m) 6144 return NULL; 6145 6146 comb = mtod(m, struct sadb_comb *); 6147 memset(comb, 0, sizeof(*comb)); 6148 key_getcomb_setlifetime(comb); 6149 comb->sadb_comb_encrypt = i; 6150 /* what should we set into sadb_comb_*_{min,max}bits? */ 6151 } 6152 6153 return m; 6154 } 6155 6156 /* 6157 * XXX no way to pass mode (transport/tunnel) to userland 6158 * XXX replay checking? 6159 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6160 */ 6161 static struct mbuf * 6162 key_getprop(const struct secasindex *saidx) 6163 { 6164 struct sadb_prop *prop; 6165 struct mbuf *m, *n; 6166 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6167 int totlen; 6168 6169 switch (saidx->proto) { 6170 case IPPROTO_ESP: 6171 m = key_getcomb_esp(); 6172 break; 6173 case IPPROTO_AH: 6174 m = key_getcomb_ah(); 6175 break; 6176 case IPPROTO_IPCOMP: 6177 m = key_getcomb_ipcomp(); 6178 break; 6179 default: 6180 return NULL; 6181 } 6182 6183 if (!m) 6184 return NULL; 6185 M_PREPEND(m, l, M_DONTWAIT); 6186 if (!m) 6187 return NULL; 6188 6189 totlen = 0; 6190 for (n = m; n; n = n->m_next) 6191 totlen += n->m_len; 6192 6193 prop = mtod(m, struct sadb_prop *); 6194 memset(prop, 0, sizeof(*prop)); 6195 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6196 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6197 prop->sadb_prop_replay = 32; /* XXX */ 6198 6199 return m; 6200 } 6201 6202 /* 6203 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6204 * send 6205 * <base, SA, address(SD), (address(P)), x_policy, 6206 * (identity(SD),) (sensitivity,) proposal> 6207 * to KMD, and expect to receive 6208 * <base> with SADB_ACQUIRE if error occurred, 6209 * or 6210 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6211 * from KMD by PF_KEY. 6212 * 6213 * XXX x_policy is outside of RFC2367 (KAME extension). 6214 * XXX sensitivity is not supported. 6215 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6216 * see comment for key_getcomb_ipcomp(). 6217 * 6218 * OUT: 6219 * 0 : succeed 6220 * others: error number 6221 */ 6222 static int 6223 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6224 { 6225 struct mbuf *result = NULL, *m; 6226 #ifndef IPSEC_NONBLOCK_ACQUIRE 6227 struct secacq *newacq; 6228 #endif 6229 u_int8_t satype; 6230 int error = -1; 6231 u_int32_t seq; 6232 6233 /* sanity check */ 6234 KASSERT(saidx != NULL); 6235 satype = key_proto2satype(saidx->proto); 6236 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6237 6238 #ifndef IPSEC_NONBLOCK_ACQUIRE 6239 /* 6240 * We never do anything about acquirng SA. There is anather 6241 * solution that kernel blocks to send SADB_ACQUIRE message until 6242 * getting something message from IKEd. In later case, to be 6243 * managed with ACQUIRING list. 6244 */ 6245 /* Get an entry to check whether sending message or not. */ 6246 mutex_enter(&key_mtx); 6247 newacq = key_getacq(saidx); 6248 if (newacq != NULL) { 6249 if (key_blockacq_count < newacq->count) { 6250 /* reset counter and do send message. */ 6251 newacq->count = 0; 6252 } else { 6253 /* increment counter and do nothing. */ 6254 newacq->count++; 6255 mutex_exit(&key_mtx); 6256 return 0; 6257 } 6258 } else { 6259 /* make new entry for blocking to send SADB_ACQUIRE. */ 6260 newacq = key_newacq(saidx); 6261 if (newacq == NULL) 6262 return ENOBUFS; 6263 6264 /* add to acqtree */ 6265 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6266 } 6267 6268 seq = newacq->seq; 6269 mutex_exit(&key_mtx); 6270 #else 6271 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6272 #endif 6273 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6274 if (!m) { 6275 error = ENOBUFS; 6276 goto fail; 6277 } 6278 result = m; 6279 6280 /* set sadb_address for saidx's. */ 6281 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &saidx->src.sa, FULLMASK, 6282 IPSEC_ULPROTO_ANY); 6283 if (!m) { 6284 error = ENOBUFS; 6285 goto fail; 6286 } 6287 m_cat(result, m); 6288 6289 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &saidx->dst.sa, FULLMASK, 6290 IPSEC_ULPROTO_ANY); 6291 if (!m) { 6292 error = ENOBUFS; 6293 goto fail; 6294 } 6295 m_cat(result, m); 6296 6297 /* XXX proxy address (optional) */ 6298 6299 /* set sadb_x_policy */ 6300 if (sp) { 6301 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6302 if (!m) { 6303 error = ENOBUFS; 6304 goto fail; 6305 } 6306 m_cat(result, m); 6307 } 6308 6309 /* XXX identity (optional) */ 6310 #if 0 6311 if (idexttype && fqdn) { 6312 /* create identity extension (FQDN) */ 6313 struct sadb_ident *id; 6314 int fqdnlen; 6315 6316 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6317 id = (struct sadb_ident *)p; 6318 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6319 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6320 id->sadb_ident_exttype = idexttype; 6321 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6322 memcpy(id + 1, fqdn, fqdnlen); 6323 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6324 } 6325 6326 if (idexttype) { 6327 /* create identity extension (USERFQDN) */ 6328 struct sadb_ident *id; 6329 int userfqdnlen; 6330 6331 if (userfqdn) { 6332 /* +1 for terminating-NUL */ 6333 userfqdnlen = strlen(userfqdn) + 1; 6334 } else 6335 userfqdnlen = 0; 6336 id = (struct sadb_ident *)p; 6337 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6338 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6339 id->sadb_ident_exttype = idexttype; 6340 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6341 /* XXX is it correct? */ 6342 if (curlwp) 6343 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6344 if (userfqdn && userfqdnlen) 6345 memcpy(id + 1, userfqdn, userfqdnlen); 6346 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6347 } 6348 #endif 6349 6350 /* XXX sensitivity (optional) */ 6351 6352 /* create proposal/combination extension */ 6353 m = key_getprop(saidx); 6354 #if 0 6355 /* 6356 * spec conformant: always attach proposal/combination extension, 6357 * the problem is that we have no way to attach it for ipcomp, 6358 * due to the way sadb_comb is declared in RFC2367. 6359 */ 6360 if (!m) { 6361 error = ENOBUFS; 6362 goto fail; 6363 } 6364 m_cat(result, m); 6365 #else 6366 /* 6367 * outside of spec; make proposal/combination extension optional. 6368 */ 6369 if (m) 6370 m_cat(result, m); 6371 #endif 6372 6373 if ((result->m_flags & M_PKTHDR) == 0) { 6374 error = EINVAL; 6375 goto fail; 6376 } 6377 6378 if (result->m_len < sizeof(struct sadb_msg)) { 6379 result = m_pullup(result, sizeof(struct sadb_msg)); 6380 if (result == NULL) { 6381 error = ENOBUFS; 6382 goto fail; 6383 } 6384 } 6385 6386 result->m_pkthdr.len = 0; 6387 for (m = result; m; m = m->m_next) 6388 result->m_pkthdr.len += m->m_len; 6389 6390 mtod(result, struct sadb_msg *)->sadb_msg_len = 6391 PFKEY_UNIT64(result->m_pkthdr.len); 6392 6393 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6394 6395 fail: 6396 if (result) 6397 m_freem(result); 6398 return error; 6399 } 6400 6401 #ifndef IPSEC_NONBLOCK_ACQUIRE 6402 static struct secacq * 6403 key_newacq(const struct secasindex *saidx) 6404 { 6405 struct secacq *newacq; 6406 6407 /* get new entry */ 6408 newacq = kmem_intr_zalloc(sizeof(struct secacq), KM_NOSLEEP); 6409 if (newacq == NULL) { 6410 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6411 return NULL; 6412 } 6413 6414 /* copy secindex */ 6415 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6416 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6417 newacq->created = time_uptime; 6418 newacq->count = 0; 6419 6420 return newacq; 6421 } 6422 6423 static struct secacq * 6424 key_getacq(const struct secasindex *saidx) 6425 { 6426 struct secacq *acq; 6427 6428 KASSERT(mutex_owned(&key_mtx)); 6429 6430 LIST_FOREACH(acq, &acqtree, chain) { 6431 if (key_saidx_match(saidx, &acq->saidx, CMP_EXACTLY)) 6432 return acq; 6433 } 6434 6435 return NULL; 6436 } 6437 6438 static struct secacq * 6439 key_getacqbyseq(u_int32_t seq) 6440 { 6441 struct secacq *acq; 6442 6443 KASSERT(mutex_owned(&key_mtx)); 6444 6445 LIST_FOREACH(acq, &acqtree, chain) { 6446 if (acq->seq == seq) 6447 return acq; 6448 } 6449 6450 return NULL; 6451 } 6452 #endif 6453 6454 #ifdef notyet 6455 static struct secspacq * 6456 key_newspacq(const struct secpolicyindex *spidx) 6457 { 6458 struct secspacq *acq; 6459 6460 /* get new entry */ 6461 acq = kmem_intr_zalloc(sizeof(struct secspacq), KM_NOSLEEP); 6462 if (acq == NULL) { 6463 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6464 return NULL; 6465 } 6466 6467 /* copy secindex */ 6468 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6469 acq->created = time_uptime; 6470 acq->count = 0; 6471 6472 return acq; 6473 } 6474 6475 static struct secspacq * 6476 key_getspacq(const struct secpolicyindex *spidx) 6477 { 6478 struct secspacq *acq; 6479 6480 LIST_FOREACH(acq, &spacqtree, chain) { 6481 if (key_spidx_match_exactly(spidx, &acq->spidx)) 6482 return acq; 6483 } 6484 6485 return NULL; 6486 } 6487 #endif /* notyet */ 6488 6489 /* 6490 * SADB_ACQUIRE processing, 6491 * in first situation, is receiving 6492 * <base> 6493 * from the ikmpd, and clear sequence of its secasvar entry. 6494 * 6495 * In second situation, is receiving 6496 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6497 * from a user land process, and return 6498 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6499 * to the socket. 6500 * 6501 * m will always be freed. 6502 */ 6503 static int 6504 key_acquire2(struct socket *so, struct mbuf *m, 6505 const struct sadb_msghdr *mhp) 6506 { 6507 const struct sockaddr *src, *dst; 6508 struct secasindex saidx; 6509 struct secashead *sah; 6510 u_int16_t proto; 6511 int error; 6512 6513 KASSERT(so != NULL); 6514 KASSERT(m != NULL); 6515 KASSERT(mhp != NULL); 6516 KASSERT(mhp->msg != NULL); 6517 6518 /* 6519 * Error message from KMd. 6520 * We assume that if error was occurred in IKEd, the length of PFKEY 6521 * message is equal to the size of sadb_msg structure. 6522 * We do not raise error even if error occurred in this function. 6523 */ 6524 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6525 #ifndef IPSEC_NONBLOCK_ACQUIRE 6526 struct secacq *acq; 6527 6528 /* check sequence number */ 6529 if (mhp->msg->sadb_msg_seq == 0) { 6530 IPSECLOG(LOG_DEBUG, "must specify sequence number.\n"); 6531 m_freem(m); 6532 return 0; 6533 } 6534 6535 mutex_enter(&key_mtx); 6536 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 6537 if (acq == NULL) { 6538 mutex_exit(&key_mtx); 6539 /* 6540 * the specified larval SA is already gone, or we got 6541 * a bogus sequence number. we can silently ignore it. 6542 */ 6543 m_freem(m); 6544 return 0; 6545 } 6546 6547 /* reset acq counter in order to deletion by timehander. */ 6548 acq->created = time_uptime; 6549 acq->count = 0; 6550 mutex_exit(&key_mtx); 6551 #endif 6552 m_freem(m); 6553 return 0; 6554 } 6555 6556 /* 6557 * This message is from user land. 6558 */ 6559 6560 /* map satype to proto */ 6561 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6562 if (proto == 0) { 6563 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6564 return key_senderror(so, m, EINVAL); 6565 } 6566 6567 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6568 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6569 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6570 /* error */ 6571 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6572 return key_senderror(so, m, EINVAL); 6573 } 6574 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6575 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6576 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6577 /* error */ 6578 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6579 return key_senderror(so, m, EINVAL); 6580 } 6581 6582 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6583 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6584 6585 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6586 if (error != 0) 6587 return key_senderror(so, m, EINVAL); 6588 6589 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6590 if (error != 0) 6591 return key_senderror(so, m, EINVAL); 6592 6593 /* get a SA index */ 6594 LIST_FOREACH(sah, &sahtree, chain) { 6595 if (sah->state == SADB_SASTATE_DEAD) 6596 continue; 6597 if (key_saidx_match(&sah->saidx, &saidx, CMP_MODE_REQID)) 6598 break; 6599 } 6600 if (sah != NULL) { 6601 IPSECLOG(LOG_DEBUG, "a SA exists already.\n"); 6602 return key_senderror(so, m, EEXIST); 6603 } 6604 6605 error = key_acquire(&saidx, NULL); 6606 if (error != 0) { 6607 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 6608 mhp->msg->sadb_msg_errno); 6609 return key_senderror(so, m, error); 6610 } 6611 6612 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6613 } 6614 6615 /* 6616 * SADB_REGISTER processing. 6617 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6618 * receive 6619 * <base> 6620 * from the ikmpd, and register a socket to send PF_KEY messages, 6621 * and send 6622 * <base, supported> 6623 * to KMD by PF_KEY. 6624 * If socket is detached, must free from regnode. 6625 * 6626 * m will always be freed. 6627 */ 6628 static int 6629 key_register(struct socket *so, struct mbuf *m, 6630 const struct sadb_msghdr *mhp) 6631 { 6632 struct secreg *reg, *newreg = 0; 6633 6634 KASSERT(!cpu_softintr_p()); 6635 KASSERT(so != NULL); 6636 KASSERT(m != NULL); 6637 KASSERT(mhp != NULL); 6638 KASSERT(mhp->msg != NULL); 6639 6640 /* check for invalid register message */ 6641 if (mhp->msg->sadb_msg_satype >= __arraycount(regtree)) 6642 return key_senderror(so, m, EINVAL); 6643 6644 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6645 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6646 goto setmsg; 6647 6648 /* Allocate regnode in advance, out of mutex */ 6649 newreg = kmem_zalloc(sizeof(*newreg), KM_SLEEP); 6650 6651 /* check whether existing or not */ 6652 mutex_enter(&key_mtx); 6653 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6654 if (reg->so == so) { 6655 IPSECLOG(LOG_DEBUG, "socket exists already.\n"); 6656 mutex_exit(&key_mtx); 6657 kmem_free(newreg, sizeof(*newreg)); 6658 return key_senderror(so, m, EEXIST); 6659 } 6660 } 6661 6662 newreg->so = so; 6663 ((struct keycb *)sotorawcb(so))->kp_registered++; 6664 6665 /* add regnode to regtree. */ 6666 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6667 mutex_exit(&key_mtx); 6668 6669 setmsg: 6670 { 6671 struct mbuf *n; 6672 struct sadb_msg *newmsg; 6673 struct sadb_supported *sup; 6674 u_int len, alen, elen; 6675 int off; 6676 int i; 6677 struct sadb_alg *alg; 6678 6679 /* create new sadb_msg to reply. */ 6680 alen = 0; 6681 for (i = 1; i <= SADB_AALG_MAX; i++) { 6682 if (ah_algorithm_lookup(i)) 6683 alen += sizeof(struct sadb_alg); 6684 } 6685 if (alen) 6686 alen += sizeof(struct sadb_supported); 6687 elen = 0; 6688 for (i = 1; i <= SADB_EALG_MAX; i++) { 6689 if (esp_algorithm_lookup(i)) 6690 elen += sizeof(struct sadb_alg); 6691 } 6692 if (elen) 6693 elen += sizeof(struct sadb_supported); 6694 6695 len = sizeof(struct sadb_msg) + alen + elen; 6696 6697 if (len > MCLBYTES) 6698 return key_senderror(so, m, ENOBUFS); 6699 6700 MGETHDR(n, M_DONTWAIT, MT_DATA); 6701 if (len > MHLEN) { 6702 MCLGET(n, M_DONTWAIT); 6703 if ((n->m_flags & M_EXT) == 0) { 6704 m_freem(n); 6705 n = NULL; 6706 } 6707 } 6708 if (!n) 6709 return key_senderror(so, m, ENOBUFS); 6710 6711 n->m_pkthdr.len = n->m_len = len; 6712 n->m_next = NULL; 6713 off = 0; 6714 6715 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6716 newmsg = mtod(n, struct sadb_msg *); 6717 newmsg->sadb_msg_errno = 0; 6718 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6719 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6720 6721 /* for authentication algorithm */ 6722 if (alen) { 6723 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6724 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6725 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6726 off += PFKEY_ALIGN8(sizeof(*sup)); 6727 6728 for (i = 1; i <= SADB_AALG_MAX; i++) { 6729 const struct auth_hash *aalgo; 6730 u_int16_t minkeysize, maxkeysize; 6731 6732 aalgo = ah_algorithm_lookup(i); 6733 if (!aalgo) 6734 continue; 6735 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6736 alg->sadb_alg_id = i; 6737 alg->sadb_alg_ivlen = 0; 6738 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6739 alg->sadb_alg_minbits = _BITS(minkeysize); 6740 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6741 off += PFKEY_ALIGN8(sizeof(*alg)); 6742 } 6743 } 6744 6745 /* for encryption algorithm */ 6746 if (elen) { 6747 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6748 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6749 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6750 off += PFKEY_ALIGN8(sizeof(*sup)); 6751 6752 for (i = 1; i <= SADB_EALG_MAX; i++) { 6753 const struct enc_xform *ealgo; 6754 6755 ealgo = esp_algorithm_lookup(i); 6756 if (!ealgo) 6757 continue; 6758 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6759 alg->sadb_alg_id = i; 6760 alg->sadb_alg_ivlen = ealgo->blocksize; 6761 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6762 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6763 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6764 } 6765 } 6766 6767 KASSERTMSG(off == len, "length inconsistency"); 6768 6769 m_freem(m); 6770 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6771 } 6772 } 6773 6774 /* 6775 * free secreg entry registered. 6776 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6777 */ 6778 void 6779 key_freereg(struct socket *so) 6780 { 6781 struct secreg *reg; 6782 int i; 6783 6784 KASSERT(!cpu_softintr_p()); 6785 KASSERT(so != NULL); 6786 6787 /* 6788 * check whether existing or not. 6789 * check all type of SA, because there is a potential that 6790 * one socket is registered to multiple type of SA. 6791 */ 6792 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6793 mutex_enter(&key_mtx); 6794 LIST_FOREACH(reg, ®tree[i], chain) { 6795 if (reg->so == so) { 6796 LIST_REMOVE(reg, chain); 6797 break; 6798 } 6799 } 6800 mutex_exit(&key_mtx); 6801 if (reg != NULL) 6802 kmem_free(reg, sizeof(*reg)); 6803 } 6804 6805 return; 6806 } 6807 6808 /* 6809 * SADB_EXPIRE processing 6810 * send 6811 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6812 * to KMD by PF_KEY. 6813 * NOTE: We send only soft lifetime extension. 6814 * 6815 * OUT: 0 : succeed 6816 * others : error number 6817 */ 6818 static int 6819 key_expire(struct secasvar *sav) 6820 { 6821 int s; 6822 int satype; 6823 struct mbuf *result = NULL, *m; 6824 int len; 6825 int error = -1; 6826 struct sadb_lifetime *lt; 6827 6828 /* XXX: Why do we lock ? */ 6829 s = splsoftnet(); /*called from softclock()*/ 6830 6831 KASSERT(sav != NULL); 6832 KASSERT(sav->sah != NULL); 6833 6834 satype = key_proto2satype(sav->sah->saidx.proto); 6835 KASSERTMSG(satype != 0, "invalid proto is passed"); 6836 6837 /* set msg header */ 6838 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6839 if (!m) { 6840 error = ENOBUFS; 6841 goto fail; 6842 } 6843 result = m; 6844 6845 /* create SA extension */ 6846 m = key_setsadbsa(sav); 6847 if (!m) { 6848 error = ENOBUFS; 6849 goto fail; 6850 } 6851 m_cat(result, m); 6852 6853 /* create SA extension */ 6854 m = key_setsadbxsa2(sav->sah->saidx.mode, 6855 sav->replay ? sav->replay->count : 0, sav->sah->saidx.reqid); 6856 if (!m) { 6857 error = ENOBUFS; 6858 goto fail; 6859 } 6860 m_cat(result, m); 6861 6862 /* create lifetime extension (current and soft) */ 6863 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6864 m = key_alloc_mbuf(len); 6865 if (!m || m->m_next) { /*XXX*/ 6866 if (m) 6867 m_freem(m); 6868 error = ENOBUFS; 6869 goto fail; 6870 } 6871 memset(mtod(m, void *), 0, len); 6872 lt = mtod(m, struct sadb_lifetime *); 6873 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6874 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6875 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6876 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6877 lt->sadb_lifetime_addtime = 6878 time_mono_to_wall(sav->lft_c->sadb_lifetime_addtime); 6879 lt->sadb_lifetime_usetime = 6880 time_mono_to_wall(sav->lft_c->sadb_lifetime_usetime); 6881 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6882 memcpy(lt, sav->lft_s, sizeof(*lt)); 6883 m_cat(result, m); 6884 6885 /* set sadb_address for source */ 6886 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 6887 FULLMASK, IPSEC_ULPROTO_ANY); 6888 if (!m) { 6889 error = ENOBUFS; 6890 goto fail; 6891 } 6892 m_cat(result, m); 6893 6894 /* set sadb_address for destination */ 6895 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.dst.sa, 6896 FULLMASK, IPSEC_ULPROTO_ANY); 6897 if (!m) { 6898 error = ENOBUFS; 6899 goto fail; 6900 } 6901 m_cat(result, m); 6902 6903 if ((result->m_flags & M_PKTHDR) == 0) { 6904 error = EINVAL; 6905 goto fail; 6906 } 6907 6908 if (result->m_len < sizeof(struct sadb_msg)) { 6909 result = m_pullup(result, sizeof(struct sadb_msg)); 6910 if (result == NULL) { 6911 error = ENOBUFS; 6912 goto fail; 6913 } 6914 } 6915 6916 result->m_pkthdr.len = 0; 6917 for (m = result; m; m = m->m_next) 6918 result->m_pkthdr.len += m->m_len; 6919 6920 mtod(result, struct sadb_msg *)->sadb_msg_len = 6921 PFKEY_UNIT64(result->m_pkthdr.len); 6922 6923 splx(s); 6924 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6925 6926 fail: 6927 if (result) 6928 m_freem(result); 6929 splx(s); 6930 return error; 6931 } 6932 6933 /* 6934 * SADB_FLUSH processing 6935 * receive 6936 * <base> 6937 * from the ikmpd, and free all entries in secastree. 6938 * and send, 6939 * <base> 6940 * to the ikmpd. 6941 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6942 * 6943 * m will always be freed. 6944 */ 6945 static int 6946 key_flush(struct socket *so, struct mbuf *m, 6947 const struct sadb_msghdr *mhp) 6948 { 6949 struct sadb_msg *newmsg; 6950 struct secashead *sah; 6951 struct secasvar *sav, *nextsav; 6952 u_int16_t proto; 6953 u_int8_t state; 6954 6955 KASSERT(so != NULL); 6956 KASSERT(mhp != NULL); 6957 KASSERT(mhp->msg != NULL); 6958 6959 /* map satype to proto */ 6960 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6961 if (proto == 0) { 6962 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6963 return key_senderror(so, m, EINVAL); 6964 } 6965 6966 /* no SATYPE specified, i.e. flushing all SA. */ 6967 LIST_FOREACH(sah, &sahtree, chain) { 6968 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && 6969 proto != sah->saidx.proto) 6970 continue; 6971 6972 SASTATE_ALIVE_FOREACH(state) { 6973 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 6974 nextsav) { 6975 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6976 KEY_FREESAV(&sav); 6977 } 6978 } 6979 6980 sah->state = SADB_SASTATE_DEAD; 6981 } 6982 6983 if (m->m_len < sizeof(struct sadb_msg) || 6984 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6985 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6986 return key_senderror(so, m, ENOBUFS); 6987 } 6988 6989 if (m->m_next) 6990 m_freem(m->m_next); 6991 m->m_next = NULL; 6992 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6993 newmsg = mtod(m, struct sadb_msg *); 6994 newmsg->sadb_msg_errno = 0; 6995 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6996 6997 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6998 } 6999 7000 7001 static struct mbuf * 7002 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 7003 { 7004 struct secashead *sah; 7005 struct secasvar *sav; 7006 u_int16_t proto; 7007 u_int8_t satype; 7008 u_int8_t state; 7009 int cnt; 7010 struct mbuf *m, *n, *prev; 7011 7012 *lenp = 0; 7013 7014 /* map satype to proto */ 7015 proto = key_satype2proto(req_satype); 7016 if (proto == 0) { 7017 *errorp = EINVAL; 7018 return (NULL); 7019 } 7020 7021 /* count sav entries to be sent to userland. */ 7022 cnt = 0; 7023 LIST_FOREACH(sah, &sahtree, chain) { 7024 if (req_satype != SADB_SATYPE_UNSPEC && 7025 proto != sah->saidx.proto) 7026 continue; 7027 7028 SASTATE_ANY_FOREACH(state) { 7029 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7030 cnt++; 7031 } 7032 } 7033 } 7034 7035 if (cnt == 0) { 7036 *errorp = ENOENT; 7037 return (NULL); 7038 } 7039 7040 /* send this to the userland, one at a time. */ 7041 m = NULL; 7042 prev = m; 7043 LIST_FOREACH(sah, &sahtree, chain) { 7044 if (req_satype != SADB_SATYPE_UNSPEC && 7045 proto != sah->saidx.proto) 7046 continue; 7047 7048 /* map proto to satype */ 7049 satype = key_proto2satype(sah->saidx.proto); 7050 if (satype == 0) { 7051 m_freem(m); 7052 *errorp = EINVAL; 7053 return (NULL); 7054 } 7055 7056 SASTATE_ANY_FOREACH(state) { 7057 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7058 n = key_setdumpsa(sav, SADB_DUMP, satype, 7059 --cnt, pid); 7060 if (!n) { 7061 m_freem(m); 7062 *errorp = ENOBUFS; 7063 return (NULL); 7064 } 7065 7066 if (!m) 7067 m = n; 7068 else 7069 prev->m_nextpkt = n; 7070 prev = n; 7071 } 7072 } 7073 } 7074 7075 if (!m) { 7076 *errorp = EINVAL; 7077 return (NULL); 7078 } 7079 7080 if ((m->m_flags & M_PKTHDR) != 0) { 7081 m->m_pkthdr.len = 0; 7082 for (n = m; n; n = n->m_next) 7083 m->m_pkthdr.len += n->m_len; 7084 } 7085 7086 *errorp = 0; 7087 return (m); 7088 } 7089 7090 /* 7091 * SADB_DUMP processing 7092 * dump all entries including status of DEAD in SAD. 7093 * receive 7094 * <base> 7095 * from the ikmpd, and dump all secasvar leaves 7096 * and send, 7097 * <base> ..... 7098 * to the ikmpd. 7099 * 7100 * m will always be freed. 7101 */ 7102 static int 7103 key_dump(struct socket *so, struct mbuf *m0, 7104 const struct sadb_msghdr *mhp) 7105 { 7106 u_int16_t proto; 7107 u_int8_t satype; 7108 struct mbuf *n; 7109 int s; 7110 int error, len, ok; 7111 7112 KASSERT(so != NULL); 7113 KASSERT(m0 != NULL); 7114 KASSERT(mhp != NULL); 7115 KASSERT(mhp->msg != NULL); 7116 7117 /* map satype to proto */ 7118 satype = mhp->msg->sadb_msg_satype; 7119 proto = key_satype2proto(satype); 7120 if (proto == 0) { 7121 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7122 return key_senderror(so, m0, EINVAL); 7123 } 7124 7125 /* 7126 * If the requestor has insufficient socket-buffer space 7127 * for the entire chain, nobody gets any response to the DUMP. 7128 * XXX For now, only the requestor ever gets anything. 7129 * Moreover, if the requestor has any space at all, they receive 7130 * the entire chain, otherwise the request is refused with ENOBUFS. 7131 */ 7132 if (sbspace(&so->so_rcv) <= 0) { 7133 return key_senderror(so, m0, ENOBUFS); 7134 } 7135 7136 s = splsoftnet(); 7137 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7138 splx(s); 7139 7140 if (n == NULL) { 7141 return key_senderror(so, m0, ENOENT); 7142 } 7143 { 7144 uint64_t *ps = PFKEY_STAT_GETREF(); 7145 ps[PFKEY_STAT_IN_TOTAL]++; 7146 ps[PFKEY_STAT_IN_BYTES] += len; 7147 PFKEY_STAT_PUTREF(); 7148 } 7149 7150 /* 7151 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7152 * The requestor receives either the entire chain, or an 7153 * error message with ENOBUFS. 7154 * 7155 * sbappendaddrchain() takes the chain of entries, one 7156 * packet-record per SPD entry, prepends the key_src sockaddr 7157 * to each packet-record, links the sockaddr mbufs into a new 7158 * list of records, then appends the entire resulting 7159 * list to the requesting socket. 7160 */ 7161 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 7162 SB_PRIO_ONESHOT_OVERFLOW); 7163 7164 if (!ok) { 7165 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7166 m_freem(n); 7167 return key_senderror(so, m0, ENOBUFS); 7168 } 7169 7170 m_freem(m0); 7171 return 0; 7172 } 7173 7174 /* 7175 * SADB_X_PROMISC processing 7176 * 7177 * m will always be freed. 7178 */ 7179 static int 7180 key_promisc(struct socket *so, struct mbuf *m, 7181 const struct sadb_msghdr *mhp) 7182 { 7183 int olen; 7184 7185 KASSERT(so != NULL); 7186 KASSERT(m != NULL); 7187 KASSERT(mhp != NULL); 7188 KASSERT(mhp->msg != NULL); 7189 7190 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7191 7192 if (olen < sizeof(struct sadb_msg)) { 7193 #if 1 7194 return key_senderror(so, m, EINVAL); 7195 #else 7196 m_freem(m); 7197 return 0; 7198 #endif 7199 } else if (olen == sizeof(struct sadb_msg)) { 7200 /* enable/disable promisc mode */ 7201 struct keycb *kp = (struct keycb *)sotorawcb(so); 7202 if (kp == NULL) 7203 return key_senderror(so, m, EINVAL); 7204 mhp->msg->sadb_msg_errno = 0; 7205 switch (mhp->msg->sadb_msg_satype) { 7206 case 0: 7207 case 1: 7208 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7209 break; 7210 default: 7211 return key_senderror(so, m, EINVAL); 7212 } 7213 7214 /* send the original message back to everyone */ 7215 mhp->msg->sadb_msg_errno = 0; 7216 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7217 } else { 7218 /* send packet as is */ 7219 7220 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7221 7222 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7223 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7224 } 7225 } 7226 7227 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7228 const struct sadb_msghdr *) = { 7229 NULL, /* SADB_RESERVED */ 7230 key_getspi, /* SADB_GETSPI */ 7231 key_update, /* SADB_UPDATE */ 7232 key_add, /* SADB_ADD */ 7233 key_delete, /* SADB_DELETE */ 7234 key_get, /* SADB_GET */ 7235 key_acquire2, /* SADB_ACQUIRE */ 7236 key_register, /* SADB_REGISTER */ 7237 NULL, /* SADB_EXPIRE */ 7238 key_flush, /* SADB_FLUSH */ 7239 key_dump, /* SADB_DUMP */ 7240 key_promisc, /* SADB_X_PROMISC */ 7241 NULL, /* SADB_X_PCHANGE */ 7242 key_spdadd, /* SADB_X_SPDUPDATE */ 7243 key_spdadd, /* SADB_X_SPDADD */ 7244 key_spddelete, /* SADB_X_SPDDELETE */ 7245 key_spdget, /* SADB_X_SPDGET */ 7246 NULL, /* SADB_X_SPDACQUIRE */ 7247 key_spddump, /* SADB_X_SPDDUMP */ 7248 key_spdflush, /* SADB_X_SPDFLUSH */ 7249 key_spdadd, /* SADB_X_SPDSETIDX */ 7250 NULL, /* SADB_X_SPDEXPIRE */ 7251 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7252 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7253 }; 7254 7255 /* 7256 * parse sadb_msg buffer to process PFKEYv2, 7257 * and create a data to response if needed. 7258 * I think to be dealed with mbuf directly. 7259 * IN: 7260 * msgp : pointer to pointer to a received buffer pulluped. 7261 * This is rewrited to response. 7262 * so : pointer to socket. 7263 * OUT: 7264 * length for buffer to send to user process. 7265 */ 7266 int 7267 key_parse(struct mbuf *m, struct socket *so) 7268 { 7269 struct sadb_msg *msg; 7270 struct sadb_msghdr mh; 7271 u_int orglen; 7272 int error; 7273 7274 KASSERT(m != NULL); 7275 KASSERT(so != NULL); 7276 7277 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7278 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7279 IPSECLOG(LOG_DEBUG, "passed sadb_msg\n"); 7280 kdebug_sadb(msg); 7281 } 7282 #endif 7283 7284 if (m->m_len < sizeof(struct sadb_msg)) { 7285 m = m_pullup(m, sizeof(struct sadb_msg)); 7286 if (!m) 7287 return ENOBUFS; 7288 } 7289 msg = mtod(m, struct sadb_msg *); 7290 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7291 7292 if ((m->m_flags & M_PKTHDR) == 0 || 7293 m->m_pkthdr.len != orglen) { 7294 IPSECLOG(LOG_DEBUG, "invalid message length.\n"); 7295 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7296 error = EINVAL; 7297 goto senderror; 7298 } 7299 7300 if (msg->sadb_msg_version != PF_KEY_V2) { 7301 IPSECLOG(LOG_DEBUG, "PF_KEY version %u is mismatched.\n", 7302 msg->sadb_msg_version); 7303 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7304 error = EINVAL; 7305 goto senderror; 7306 } 7307 7308 if (msg->sadb_msg_type > SADB_MAX) { 7309 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7310 msg->sadb_msg_type); 7311 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7312 error = EINVAL; 7313 goto senderror; 7314 } 7315 7316 /* for old-fashioned code - should be nuked */ 7317 if (m->m_pkthdr.len > MCLBYTES) { 7318 m_freem(m); 7319 return ENOBUFS; 7320 } 7321 if (m->m_next) { 7322 struct mbuf *n; 7323 7324 MGETHDR(n, M_DONTWAIT, MT_DATA); 7325 if (n && m->m_pkthdr.len > MHLEN) { 7326 MCLGET(n, M_DONTWAIT); 7327 if ((n->m_flags & M_EXT) == 0) { 7328 m_free(n); 7329 n = NULL; 7330 } 7331 } 7332 if (!n) { 7333 m_freem(m); 7334 return ENOBUFS; 7335 } 7336 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7337 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7338 n->m_next = NULL; 7339 m_freem(m); 7340 m = n; 7341 } 7342 7343 /* align the mbuf chain so that extensions are in contiguous region. */ 7344 error = key_align(m, &mh); 7345 if (error) 7346 return error; 7347 7348 if (m->m_next) { /*XXX*/ 7349 m_freem(m); 7350 return ENOBUFS; 7351 } 7352 7353 msg = mh.msg; 7354 7355 /* check SA type */ 7356 switch (msg->sadb_msg_satype) { 7357 case SADB_SATYPE_UNSPEC: 7358 switch (msg->sadb_msg_type) { 7359 case SADB_GETSPI: 7360 case SADB_UPDATE: 7361 case SADB_ADD: 7362 case SADB_DELETE: 7363 case SADB_GET: 7364 case SADB_ACQUIRE: 7365 case SADB_EXPIRE: 7366 IPSECLOG(LOG_DEBUG, 7367 "must specify satype when msg type=%u.\n", 7368 msg->sadb_msg_type); 7369 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7370 error = EINVAL; 7371 goto senderror; 7372 } 7373 break; 7374 case SADB_SATYPE_AH: 7375 case SADB_SATYPE_ESP: 7376 case SADB_X_SATYPE_IPCOMP: 7377 case SADB_X_SATYPE_TCPSIGNATURE: 7378 switch (msg->sadb_msg_type) { 7379 case SADB_X_SPDADD: 7380 case SADB_X_SPDDELETE: 7381 case SADB_X_SPDGET: 7382 case SADB_X_SPDDUMP: 7383 case SADB_X_SPDFLUSH: 7384 case SADB_X_SPDSETIDX: 7385 case SADB_X_SPDUPDATE: 7386 case SADB_X_SPDDELETE2: 7387 IPSECLOG(LOG_DEBUG, "illegal satype=%u\n", 7388 msg->sadb_msg_type); 7389 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7390 error = EINVAL; 7391 goto senderror; 7392 } 7393 break; 7394 case SADB_SATYPE_RSVP: 7395 case SADB_SATYPE_OSPFV2: 7396 case SADB_SATYPE_RIPV2: 7397 case SADB_SATYPE_MIP: 7398 IPSECLOG(LOG_DEBUG, "type %u isn't supported.\n", 7399 msg->sadb_msg_satype); 7400 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7401 error = EOPNOTSUPP; 7402 goto senderror; 7403 case 1: /* XXX: What does it do? */ 7404 if (msg->sadb_msg_type == SADB_X_PROMISC) 7405 break; 7406 /*FALLTHROUGH*/ 7407 default: 7408 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7409 msg->sadb_msg_satype); 7410 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7411 error = EINVAL; 7412 goto senderror; 7413 } 7414 7415 /* check field of upper layer protocol and address family */ 7416 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL && 7417 mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7418 struct sadb_address *src0, *dst0; 7419 u_int plen; 7420 7421 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7422 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7423 7424 /* check upper layer protocol */ 7425 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7426 IPSECLOG(LOG_DEBUG, "upper layer protocol mismatched.\n"); 7427 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7428 error = EINVAL; 7429 goto senderror; 7430 } 7431 7432 /* check family */ 7433 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7434 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7435 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 7436 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7437 error = EINVAL; 7438 goto senderror; 7439 } 7440 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7441 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7442 IPSECLOG(LOG_DEBUG, 7443 "address struct size mismatched.\n"); 7444 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7445 error = EINVAL; 7446 goto senderror; 7447 } 7448 7449 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7450 case AF_INET: 7451 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7452 sizeof(struct sockaddr_in)) { 7453 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7454 error = EINVAL; 7455 goto senderror; 7456 } 7457 break; 7458 case AF_INET6: 7459 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7460 sizeof(struct sockaddr_in6)) { 7461 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7462 error = EINVAL; 7463 goto senderror; 7464 } 7465 break; 7466 default: 7467 IPSECLOG(LOG_DEBUG, "unsupported address family.\n"); 7468 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7469 error = EAFNOSUPPORT; 7470 goto senderror; 7471 } 7472 7473 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7474 case AF_INET: 7475 plen = sizeof(struct in_addr) << 3; 7476 break; 7477 case AF_INET6: 7478 plen = sizeof(struct in6_addr) << 3; 7479 break; 7480 default: 7481 plen = 0; /*fool gcc*/ 7482 break; 7483 } 7484 7485 /* check max prefix length */ 7486 if (src0->sadb_address_prefixlen > plen || 7487 dst0->sadb_address_prefixlen > plen) { 7488 IPSECLOG(LOG_DEBUG, "illegal prefixlen.\n"); 7489 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7490 error = EINVAL; 7491 goto senderror; 7492 } 7493 7494 /* 7495 * prefixlen == 0 is valid because there can be a case when 7496 * all addresses are matched. 7497 */ 7498 } 7499 7500 if (msg->sadb_msg_type >= __arraycount(key_typesw) || 7501 key_typesw[msg->sadb_msg_type] == NULL) { 7502 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7503 error = EINVAL; 7504 goto senderror; 7505 } 7506 7507 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7508 7509 senderror: 7510 return key_senderror(so, m, error); 7511 } 7512 7513 static int 7514 key_senderror(struct socket *so, struct mbuf *m, int code) 7515 { 7516 struct sadb_msg *msg; 7517 7518 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7519 7520 msg = mtod(m, struct sadb_msg *); 7521 msg->sadb_msg_errno = code; 7522 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7523 } 7524 7525 /* 7526 * set the pointer to each header into message buffer. 7527 * m will be freed on error. 7528 * XXX larger-than-MCLBYTES extension? 7529 */ 7530 static int 7531 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7532 { 7533 struct mbuf *n; 7534 struct sadb_ext *ext; 7535 size_t off, end; 7536 int extlen; 7537 int toff; 7538 7539 KASSERT(m != NULL); 7540 KASSERT(mhp != NULL); 7541 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7542 7543 /* initialize */ 7544 memset(mhp, 0, sizeof(*mhp)); 7545 7546 mhp->msg = mtod(m, struct sadb_msg *); 7547 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7548 7549 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7550 extlen = end; /*just in case extlen is not updated*/ 7551 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7552 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7553 if (!n) { 7554 /* m is already freed */ 7555 return ENOBUFS; 7556 } 7557 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7558 7559 /* set pointer */ 7560 switch (ext->sadb_ext_type) { 7561 case SADB_EXT_SA: 7562 case SADB_EXT_ADDRESS_SRC: 7563 case SADB_EXT_ADDRESS_DST: 7564 case SADB_EXT_ADDRESS_PROXY: 7565 case SADB_EXT_LIFETIME_CURRENT: 7566 case SADB_EXT_LIFETIME_HARD: 7567 case SADB_EXT_LIFETIME_SOFT: 7568 case SADB_EXT_KEY_AUTH: 7569 case SADB_EXT_KEY_ENCRYPT: 7570 case SADB_EXT_IDENTITY_SRC: 7571 case SADB_EXT_IDENTITY_DST: 7572 case SADB_EXT_SENSITIVITY: 7573 case SADB_EXT_PROPOSAL: 7574 case SADB_EXT_SUPPORTED_AUTH: 7575 case SADB_EXT_SUPPORTED_ENCRYPT: 7576 case SADB_EXT_SPIRANGE: 7577 case SADB_X_EXT_POLICY: 7578 case SADB_X_EXT_SA2: 7579 case SADB_X_EXT_NAT_T_TYPE: 7580 case SADB_X_EXT_NAT_T_SPORT: 7581 case SADB_X_EXT_NAT_T_DPORT: 7582 case SADB_X_EXT_NAT_T_OAI: 7583 case SADB_X_EXT_NAT_T_OAR: 7584 case SADB_X_EXT_NAT_T_FRAG: 7585 /* duplicate check */ 7586 /* 7587 * XXX Are there duplication payloads of either 7588 * KEY_AUTH or KEY_ENCRYPT ? 7589 */ 7590 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7591 IPSECLOG(LOG_DEBUG, 7592 "duplicate ext_type %u is passed.\n", 7593 ext->sadb_ext_type); 7594 m_freem(m); 7595 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7596 return EINVAL; 7597 } 7598 break; 7599 default: 7600 IPSECLOG(LOG_DEBUG, "invalid ext_type %u is passed.\n", 7601 ext->sadb_ext_type); 7602 m_freem(m); 7603 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7604 return EINVAL; 7605 } 7606 7607 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7608 7609 if (key_validate_ext(ext, extlen)) { 7610 m_freem(m); 7611 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7612 return EINVAL; 7613 } 7614 7615 n = m_pulldown(m, off, extlen, &toff); 7616 if (!n) { 7617 /* m is already freed */ 7618 return ENOBUFS; 7619 } 7620 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7621 7622 mhp->ext[ext->sadb_ext_type] = ext; 7623 mhp->extoff[ext->sadb_ext_type] = off; 7624 mhp->extlen[ext->sadb_ext_type] = extlen; 7625 } 7626 7627 if (off != end) { 7628 m_freem(m); 7629 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7630 return EINVAL; 7631 } 7632 7633 return 0; 7634 } 7635 7636 static int 7637 key_validate_ext(const struct sadb_ext *ext, int len) 7638 { 7639 const struct sockaddr *sa; 7640 enum { NONE, ADDR } checktype = NONE; 7641 int baselen = 0; 7642 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7643 7644 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7645 return EINVAL; 7646 7647 /* if it does not match minimum/maximum length, bail */ 7648 if (ext->sadb_ext_type >= __arraycount(minsize) || 7649 ext->sadb_ext_type >= __arraycount(maxsize)) 7650 return EINVAL; 7651 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7652 return EINVAL; 7653 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7654 return EINVAL; 7655 7656 /* more checks based on sadb_ext_type XXX need more */ 7657 switch (ext->sadb_ext_type) { 7658 case SADB_EXT_ADDRESS_SRC: 7659 case SADB_EXT_ADDRESS_DST: 7660 case SADB_EXT_ADDRESS_PROXY: 7661 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7662 checktype = ADDR; 7663 break; 7664 case SADB_EXT_IDENTITY_SRC: 7665 case SADB_EXT_IDENTITY_DST: 7666 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7667 SADB_X_IDENTTYPE_ADDR) { 7668 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7669 checktype = ADDR; 7670 } else 7671 checktype = NONE; 7672 break; 7673 default: 7674 checktype = NONE; 7675 break; 7676 } 7677 7678 switch (checktype) { 7679 case NONE: 7680 break; 7681 case ADDR: 7682 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7683 if (len < baselen + sal) 7684 return EINVAL; 7685 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7686 return EINVAL; 7687 break; 7688 } 7689 7690 return 0; 7691 } 7692 7693 static int 7694 key_do_init(void) 7695 { 7696 int i, error; 7697 7698 mutex_init(&key_mtx, MUTEX_DEFAULT, IPL_NONE); 7699 7700 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7701 7702 callout_init(&key_timehandler_ch, 0); 7703 error = workqueue_create(&key_timehandler_wq, "key_timehandler", 7704 key_timehandler_work, NULL, PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 7705 if (error != 0) 7706 panic("%s: workqueue_create failed (%d)\n", __func__, error); 7707 7708 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7709 LIST_INIT(&sptree[i]); 7710 } 7711 7712 LIST_INIT(&sahtree); 7713 7714 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7715 LIST_INIT(®tree[i]); 7716 } 7717 7718 #ifndef IPSEC_NONBLOCK_ACQUIRE 7719 LIST_INIT(&acqtree); 7720 #endif 7721 #ifdef notyet 7722 LIST_INIT(&spacqtree); 7723 #endif 7724 7725 /* system default */ 7726 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7727 ip4_def_policy.refcnt++; /*never reclaim this*/ 7728 7729 #ifdef INET6 7730 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7731 ip6_def_policy.refcnt++; /*never reclaim this*/ 7732 #endif 7733 7734 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7735 7736 /* initialize key statistics */ 7737 keystat.getspi_count = 1; 7738 7739 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7740 7741 return (0); 7742 } 7743 7744 void 7745 key_init(void) 7746 { 7747 static ONCE_DECL(key_init_once); 7748 7749 sysctl_net_keyv2_setup(NULL); 7750 sysctl_net_key_compat_setup(NULL); 7751 7752 RUN_ONCE(&key_init_once, key_do_init); 7753 } 7754 7755 /* 7756 * XXX: maybe This function is called after INBOUND IPsec processing. 7757 * 7758 * Special check for tunnel-mode packets. 7759 * We must make some checks for consistency between inner and outer IP header. 7760 * 7761 * xxx more checks to be provided 7762 */ 7763 int 7764 key_checktunnelsanity( 7765 struct secasvar *sav, 7766 u_int family, 7767 void *src, 7768 void *dst 7769 ) 7770 { 7771 7772 KASSERT(sav->sah != NULL); 7773 7774 /* XXX: check inner IP header */ 7775 7776 return 1; 7777 } 7778 7779 #if 0 7780 #define hostnamelen strlen(hostname) 7781 7782 /* 7783 * Get FQDN for the host. 7784 * If the administrator configured hostname (by hostname(1)) without 7785 * domain name, returns nothing. 7786 */ 7787 static const char * 7788 key_getfqdn(void) 7789 { 7790 int i; 7791 int hasdot; 7792 static char fqdn[MAXHOSTNAMELEN + 1]; 7793 7794 if (!hostnamelen) 7795 return NULL; 7796 7797 /* check if it comes with domain name. */ 7798 hasdot = 0; 7799 for (i = 0; i < hostnamelen; i++) { 7800 if (hostname[i] == '.') 7801 hasdot++; 7802 } 7803 if (!hasdot) 7804 return NULL; 7805 7806 /* NOTE: hostname may not be NUL-terminated. */ 7807 memset(fqdn, 0, sizeof(fqdn)); 7808 memcpy(fqdn, hostname, hostnamelen); 7809 fqdn[hostnamelen] = '\0'; 7810 return fqdn; 7811 } 7812 7813 /* 7814 * get username@FQDN for the host/user. 7815 */ 7816 static const char * 7817 key_getuserfqdn(void) 7818 { 7819 const char *host; 7820 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7821 struct proc *p = curproc; 7822 char *q; 7823 7824 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7825 return NULL; 7826 if (!(host = key_getfqdn())) 7827 return NULL; 7828 7829 /* NOTE: s_login may not be-NUL terminated. */ 7830 memset(userfqdn, 0, sizeof(userfqdn)); 7831 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7832 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7833 q = userfqdn + strlen(userfqdn); 7834 *q++ = '@'; 7835 memcpy(q, host, strlen(host)); 7836 q += strlen(host); 7837 *q++ = '\0'; 7838 7839 return userfqdn; 7840 } 7841 #endif 7842 7843 /* record data transfer on SA, and update timestamps */ 7844 void 7845 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7846 { 7847 7848 KASSERT(sav != NULL); 7849 KASSERT(m != NULL); 7850 if (!sav->lft_c) 7851 return; 7852 7853 /* 7854 * XXX Currently, there is a difference of bytes size 7855 * between inbound and outbound processing. 7856 */ 7857 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7858 /* to check bytes lifetime is done in key_timehandler(). */ 7859 7860 /* 7861 * We use the number of packets as the unit of 7862 * sadb_lifetime_allocations. We increment the variable 7863 * whenever {esp,ah}_{in,out}put is called. 7864 */ 7865 sav->lft_c->sadb_lifetime_allocations++; 7866 /* XXX check for expires? */ 7867 7868 /* 7869 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7870 * in seconds. HARD and SOFT lifetime are measured by the time 7871 * difference (again in seconds) from sadb_lifetime_usetime. 7872 * 7873 * usetime 7874 * v expire expire 7875 * -----+-----+--------+---> t 7876 * <--------------> HARD 7877 * <-----> SOFT 7878 */ 7879 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7880 /* XXX check for expires? */ 7881 7882 return; 7883 } 7884 7885 /* dumb version */ 7886 void 7887 key_sa_routechange(struct sockaddr *dst) 7888 { 7889 struct secashead *sah; 7890 struct route *ro; 7891 const struct sockaddr *sa; 7892 7893 LIST_FOREACH(sah, &sahtree, chain) { 7894 ro = &sah->sa_route; 7895 sa = rtcache_getdst(ro); 7896 if (sa != NULL && dst->sa_len == sa->sa_len && 7897 memcmp(dst, sa, dst->sa_len) == 0) 7898 rtcache_free(ro); 7899 } 7900 7901 return; 7902 } 7903 7904 static void 7905 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7906 { 7907 7908 KASSERT(sav != NULL); 7909 7910 if (sav->state == state) 7911 return; 7912 7913 KASSERT(__LIST_CHAINED(sav)); 7914 LIST_REMOVE(sav, chain); 7915 7916 sav->state = state; 7917 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7918 } 7919 7920 /* XXX too much? */ 7921 static struct mbuf * 7922 key_alloc_mbuf(int l) 7923 { 7924 struct mbuf *m = NULL, *n; 7925 int len, t; 7926 7927 len = l; 7928 while (len > 0) { 7929 MGET(n, M_DONTWAIT, MT_DATA); 7930 if (n && len > MLEN) 7931 MCLGET(n, M_DONTWAIT); 7932 if (!n) { 7933 m_freem(m); 7934 return NULL; 7935 } 7936 7937 n->m_next = NULL; 7938 n->m_len = 0; 7939 n->m_len = M_TRAILINGSPACE(n); 7940 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7941 if (n->m_len > len) { 7942 t = (n->m_len - len) & ~(sizeof(long) - 1); 7943 n->m_data += t; 7944 n->m_len = len; 7945 } 7946 7947 len -= n->m_len; 7948 7949 if (m) 7950 m_cat(m, n); 7951 else 7952 m = n; 7953 } 7954 7955 return m; 7956 } 7957 7958 static struct mbuf * 7959 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7960 { 7961 struct secashead *sah; 7962 struct secasvar *sav; 7963 u_int16_t proto; 7964 u_int8_t satype; 7965 u_int8_t state; 7966 int cnt; 7967 struct mbuf *m, *n; 7968 7969 /* map satype to proto */ 7970 proto = key_satype2proto(req_satype); 7971 if (proto == 0) { 7972 *errorp = EINVAL; 7973 return (NULL); 7974 } 7975 7976 /* count sav entries to be sent to the userland. */ 7977 cnt = 0; 7978 LIST_FOREACH(sah, &sahtree, chain) { 7979 if (req_satype != SADB_SATYPE_UNSPEC && 7980 proto != sah->saidx.proto) 7981 continue; 7982 7983 SASTATE_ANY_FOREACH(state) { 7984 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7985 cnt++; 7986 } 7987 } 7988 } 7989 7990 if (cnt == 0) { 7991 *errorp = ENOENT; 7992 return (NULL); 7993 } 7994 7995 /* send this to the userland, one at a time. */ 7996 m = NULL; 7997 LIST_FOREACH(sah, &sahtree, chain) { 7998 if (req_satype != SADB_SATYPE_UNSPEC && 7999 proto != sah->saidx.proto) 8000 continue; 8001 8002 /* map proto to satype */ 8003 satype = key_proto2satype(sah->saidx.proto); 8004 if (satype == 0) { 8005 m_freem(m); 8006 *errorp = EINVAL; 8007 return (NULL); 8008 } 8009 8010 SASTATE_ANY_FOREACH(state) { 8011 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8012 n = key_setdumpsa(sav, SADB_DUMP, satype, 8013 --cnt, pid); 8014 if (!n) { 8015 m_freem(m); 8016 *errorp = ENOBUFS; 8017 return (NULL); 8018 } 8019 8020 if (!m) 8021 m = n; 8022 else 8023 m_cat(m, n); 8024 } 8025 } 8026 } 8027 8028 if (!m) { 8029 *errorp = EINVAL; 8030 return (NULL); 8031 } 8032 8033 if ((m->m_flags & M_PKTHDR) != 0) { 8034 m->m_pkthdr.len = 0; 8035 for (n = m; n; n = n->m_next) 8036 m->m_pkthdr.len += n->m_len; 8037 } 8038 8039 *errorp = 0; 8040 return (m); 8041 } 8042 8043 static struct mbuf * 8044 key_setspddump(int *errorp, pid_t pid) 8045 { 8046 struct secpolicy *sp; 8047 int cnt; 8048 u_int dir; 8049 struct mbuf *m, *n; 8050 8051 /* search SPD entry and get buffer size. */ 8052 cnt = 0; 8053 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8054 LIST_FOREACH(sp, &sptree[dir], chain) { 8055 cnt++; 8056 } 8057 } 8058 8059 if (cnt == 0) { 8060 *errorp = ENOENT; 8061 return (NULL); 8062 } 8063 8064 m = NULL; 8065 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8066 LIST_FOREACH(sp, &sptree[dir], chain) { 8067 --cnt; 8068 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8069 8070 if (!n) { 8071 *errorp = ENOBUFS; 8072 m_freem(m); 8073 return (NULL); 8074 } 8075 if (!m) 8076 m = n; 8077 else { 8078 m->m_pkthdr.len += n->m_pkthdr.len; 8079 m_cat(m, n); 8080 } 8081 } 8082 } 8083 8084 *errorp = 0; 8085 return (m); 8086 } 8087 8088 int 8089 key_get_used(void) { 8090 return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || 8091 !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); 8092 } 8093 8094 void 8095 key_update_used(void) 8096 { 8097 switch (ipsec_enabled) { 8098 default: 8099 case 0: 8100 #ifdef notyet 8101 /* XXX: racy */ 8102 ipsec_used = 0; 8103 #endif 8104 break; 8105 case 1: 8106 #ifndef notyet 8107 /* XXX: racy */ 8108 if (!ipsec_used) 8109 #endif 8110 ipsec_used = key_get_used(); 8111 break; 8112 case 2: 8113 ipsec_used = 1; 8114 break; 8115 } 8116 } 8117 8118 static int 8119 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8120 { 8121 struct mbuf *m, *n; 8122 int err2 = 0; 8123 char *p, *ep; 8124 size_t len; 8125 int s, error; 8126 8127 if (newp) 8128 return (EPERM); 8129 if (namelen != 1) 8130 return (EINVAL); 8131 8132 s = splsoftnet(); 8133 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8134 splx(s); 8135 if (!m) 8136 return (error); 8137 if (!oldp) 8138 *oldlenp = m->m_pkthdr.len; 8139 else { 8140 p = oldp; 8141 if (*oldlenp < m->m_pkthdr.len) { 8142 err2 = ENOMEM; 8143 ep = p + *oldlenp; 8144 } else { 8145 *oldlenp = m->m_pkthdr.len; 8146 ep = p + m->m_pkthdr.len; 8147 } 8148 for (n = m; n; n = n->m_next) { 8149 len = (ep - p < n->m_len) ? 8150 ep - p : n->m_len; 8151 error = copyout(mtod(n, const void *), p, len); 8152 p += len; 8153 if (error) 8154 break; 8155 } 8156 if (error == 0) 8157 error = err2; 8158 } 8159 m_freem(m); 8160 8161 return (error); 8162 } 8163 8164 static int 8165 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8166 { 8167 struct mbuf *m, *n; 8168 int err2 = 0; 8169 char *p, *ep; 8170 size_t len; 8171 int s, error; 8172 8173 if (newp) 8174 return (EPERM); 8175 if (namelen != 0) 8176 return (EINVAL); 8177 8178 s = splsoftnet(); 8179 m = key_setspddump(&error, l->l_proc->p_pid); 8180 splx(s); 8181 if (!m) 8182 return (error); 8183 if (!oldp) 8184 *oldlenp = m->m_pkthdr.len; 8185 else { 8186 p = oldp; 8187 if (*oldlenp < m->m_pkthdr.len) { 8188 err2 = ENOMEM; 8189 ep = p + *oldlenp; 8190 } else { 8191 *oldlenp = m->m_pkthdr.len; 8192 ep = p + m->m_pkthdr.len; 8193 } 8194 for (n = m; n; n = n->m_next) { 8195 len = (ep - p < n->m_len) ? ep - p : n->m_len; 8196 error = copyout(mtod(n, const void *), p, len); 8197 p += len; 8198 if (error) 8199 break; 8200 } 8201 if (error == 0) 8202 error = err2; 8203 } 8204 m_freem(m); 8205 8206 return (error); 8207 } 8208 8209 /* 8210 * Create sysctl tree for native IPSEC key knobs, originally 8211 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8212 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8213 * and in any case the part of our sysctl namespace used for dumping the 8214 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8215 * namespace, for API reasons. 8216 * 8217 * Pending a consensus on the right way to fix this, add a level of 8218 * indirection in how we number the `native' IPSEC key nodes; 8219 * and (as requested by Andrew Brown) move registration of the 8220 * KAME-compatible names to a separate function. 8221 */ 8222 #if 0 8223 # define IPSEC_PFKEY PF_KEY_V2 8224 # define IPSEC_PFKEY_NAME "keyv2" 8225 #else 8226 # define IPSEC_PFKEY PF_KEY 8227 # define IPSEC_PFKEY_NAME "key" 8228 #endif 8229 8230 static int 8231 sysctl_net_key_stats(SYSCTLFN_ARGS) 8232 { 8233 8234 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8235 } 8236 8237 static void 8238 sysctl_net_keyv2_setup(struct sysctllog **clog) 8239 { 8240 8241 sysctl_createv(clog, 0, NULL, NULL, 8242 CTLFLAG_PERMANENT, 8243 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8244 NULL, 0, NULL, 0, 8245 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8246 8247 sysctl_createv(clog, 0, NULL, NULL, 8248 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8249 CTLTYPE_INT, "debug", NULL, 8250 NULL, 0, &key_debug_level, 0, 8251 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8252 sysctl_createv(clog, 0, NULL, NULL, 8253 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8254 CTLTYPE_INT, "spi_try", NULL, 8255 NULL, 0, &key_spi_trycnt, 0, 8256 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8257 sysctl_createv(clog, 0, NULL, NULL, 8258 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8259 CTLTYPE_INT, "spi_min_value", NULL, 8260 NULL, 0, &key_spi_minval, 0, 8261 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8262 sysctl_createv(clog, 0, NULL, NULL, 8263 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8264 CTLTYPE_INT, "spi_max_value", NULL, 8265 NULL, 0, &key_spi_maxval, 0, 8266 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8267 sysctl_createv(clog, 0, NULL, NULL, 8268 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8269 CTLTYPE_INT, "random_int", NULL, 8270 NULL, 0, &key_int_random, 0, 8271 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8272 sysctl_createv(clog, 0, NULL, NULL, 8273 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8274 CTLTYPE_INT, "larval_lifetime", NULL, 8275 NULL, 0, &key_larval_lifetime, 0, 8276 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8277 sysctl_createv(clog, 0, NULL, NULL, 8278 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8279 CTLTYPE_INT, "blockacq_count", NULL, 8280 NULL, 0, &key_blockacq_count, 0, 8281 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8282 sysctl_createv(clog, 0, NULL, NULL, 8283 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8284 CTLTYPE_INT, "blockacq_lifetime", NULL, 8285 NULL, 0, &key_blockacq_lifetime, 0, 8286 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8287 sysctl_createv(clog, 0, NULL, NULL, 8288 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8289 CTLTYPE_INT, "esp_keymin", NULL, 8290 NULL, 0, &ipsec_esp_keymin, 0, 8291 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8292 sysctl_createv(clog, 0, NULL, NULL, 8293 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8294 CTLTYPE_INT, "prefered_oldsa", NULL, 8295 NULL, 0, &key_prefered_oldsa, 0, 8296 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8297 sysctl_createv(clog, 0, NULL, NULL, 8298 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8299 CTLTYPE_INT, "esp_auth", NULL, 8300 NULL, 0, &ipsec_esp_auth, 0, 8301 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8302 sysctl_createv(clog, 0, NULL, NULL, 8303 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8304 CTLTYPE_INT, "ah_keymin", NULL, 8305 NULL, 0, &ipsec_ah_keymin, 0, 8306 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8307 sysctl_createv(clog, 0, NULL, NULL, 8308 CTLFLAG_PERMANENT, 8309 CTLTYPE_STRUCT, "stats", 8310 SYSCTL_DESCR("PF_KEY statistics"), 8311 sysctl_net_key_stats, 0, NULL, 0, 8312 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8313 } 8314 8315 /* 8316 * Register sysctl names used by setkey(8). For historical reasons, 8317 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8318 * for both IPSEC and KAME IPSEC. 8319 */ 8320 static void 8321 sysctl_net_key_compat_setup(struct sysctllog **clog) 8322 { 8323 8324 sysctl_createv(clog, 0, NULL, NULL, 8325 CTLFLAG_PERMANENT, 8326 CTLTYPE_NODE, "key", NULL, 8327 NULL, 0, NULL, 0, 8328 CTL_NET, PF_KEY, CTL_EOL); 8329 8330 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8331 sysctl_createv(clog, 0, NULL, NULL, 8332 CTLFLAG_PERMANENT, 8333 CTLTYPE_STRUCT, "dumpsa", NULL, 8334 sysctl_net_key_dumpsa, 0, NULL, 0, 8335 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8336 sysctl_createv(clog, 0, NULL, NULL, 8337 CTLFLAG_PERMANENT, 8338 CTLTYPE_STRUCT, "dumpsp", NULL, 8339 sysctl_net_key_dumpsp, 0, NULL, 0, 8340 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8341 } 8342
Indexes created Wed Sep 24 15:09:51 GMT 2025