key.c revision 1.146
1 /* $NetBSD: key.c,v 1.146 2017/05/28 14:16:05 mlelstv 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 1.146 2017/05/28 14:16:05 mlelstv 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 70 #include <net/if.h> 71 #include <net/route.h> 72 #include <net/raw_cb.h> 73 74 #include <netinet/in.h> 75 #include <netinet/in_systm.h> 76 #include <netinet/ip.h> 77 #include <netinet/in_var.h> 78 #ifdef INET 79 #include <netinet/ip_var.h> 80 #endif 81 82 #ifdef INET6 83 #include <netinet/ip6.h> 84 #include <netinet6/in6_var.h> 85 #include <netinet6/ip6_var.h> 86 #endif /* INET6 */ 87 88 #ifdef INET 89 #include <netinet/in_pcb.h> 90 #endif 91 #ifdef INET6 92 #include <netinet6/in6_pcb.h> 93 #endif /* INET6 */ 94 95 #include <net/pfkeyv2.h> 96 #include <netipsec/keydb.h> 97 #include <netipsec/key.h> 98 #include <netipsec/keysock.h> 99 #include <netipsec/key_debug.h> 100 101 #include <netipsec/ipsec.h> 102 #ifdef INET6 103 #include <netipsec/ipsec6.h> 104 #endif 105 #include <netipsec/ipsec_private.h> 106 107 #include <netipsec/xform.h> 108 #include <netipsec/ipcomp.h> 109 110 111 #include <net/net_osdep.h> 112 113 #define FULLMASK 0xff 114 #define _BITS(bytes) ((bytes) << 3) 115 116 #define PORT_NONE 0 117 #define PORT_LOOSE 1 118 #define PORT_STRICT 2 119 120 percpu_t *pfkeystat_percpu; 121 122 /* 123 * Note on SA reference counting: 124 * - SAs that are not in DEAD state will have (total external reference + 1) 125 * following value in reference count field. they cannot be freed and are 126 * referenced from SA header. 127 * - SAs that are in DEAD state will have (total external reference) 128 * in reference count field. they are ready to be freed. reference from 129 * SA header will be removed in key_delsav(), when the reference count 130 * field hits 0 (= no external reference other than from SA header. 131 */ 132 133 u_int32_t key_debug_level = 0; 134 static u_int key_spi_trycnt = 1000; 135 static u_int32_t key_spi_minval = 0x100; 136 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 137 static u_int32_t policy_id = 0; 138 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 139 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 140 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 141 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 142 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 143 144 static u_int32_t acq_seq = 0; 145 146 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 147 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 148 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 149 /* registed list */ 150 #ifndef IPSEC_NONBLOCK_ACQUIRE 151 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 152 #endif 153 #ifdef notyet 154 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 155 #endif 156 157 /* 158 * Protect regtree, acqtree and items stored in the lists. 159 */ 160 static kmutex_t key_mtx __cacheline_aligned; 161 162 /* search order for SAs */ 163 /* 164 * This order is important because we must select the oldest SA 165 * for outbound processing. For inbound, This is not important. 166 */ 167 static const u_int saorder_state_valid_prefer_old[] = { 168 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 169 }; 170 static const u_int saorder_state_valid_prefer_new[] = { 171 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 172 }; 173 174 static const u_int saorder_state_alive[] = { 175 /* except DEAD */ 176 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 177 }; 178 static const u_int saorder_state_any[] = { 179 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 180 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 181 }; 182 183 #define SASTATE_ALIVE_FOREACH(s) \ 184 for (int _i = 0; \ 185 _i < __arraycount(saorder_state_alive) ? \ 186 (s) = saorder_state_alive[_i], true : false; \ 187 _i++) 188 #define SASTATE_ANY_FOREACH(s) \ 189 for (int _i = 0; \ 190 _i < __arraycount(saorder_state_any) ? \ 191 (s) = saorder_state_any[_i], true : false; \ 192 _i++) 193 194 static const int minsize[] = { 195 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 196 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 197 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 198 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 199 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 200 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 201 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 202 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 203 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 204 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 205 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 206 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 207 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 208 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 209 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 210 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 211 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 212 0, /* SADB_X_EXT_KMPRIVATE */ 213 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 214 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 215 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 216 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 217 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 218 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 219 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 220 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 221 }; 222 static const int maxsize[] = { 223 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 224 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 225 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 226 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 227 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 228 0, /* SADB_EXT_ADDRESS_SRC */ 229 0, /* SADB_EXT_ADDRESS_DST */ 230 0, /* SADB_EXT_ADDRESS_PROXY */ 231 0, /* SADB_EXT_KEY_AUTH */ 232 0, /* SADB_EXT_KEY_ENCRYPT */ 233 0, /* SADB_EXT_IDENTITY_SRC */ 234 0, /* SADB_EXT_IDENTITY_DST */ 235 0, /* SADB_EXT_SENSITIVITY */ 236 0, /* SADB_EXT_PROPOSAL */ 237 0, /* SADB_EXT_SUPPORTED_AUTH */ 238 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 239 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 240 0, /* SADB_X_EXT_KMPRIVATE */ 241 0, /* SADB_X_EXT_POLICY */ 242 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 243 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 244 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 245 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 246 0, /* SADB_X_EXT_NAT_T_OAI */ 247 0, /* SADB_X_EXT_NAT_T_OAR */ 248 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 249 }; 250 251 static int ipsec_esp_keymin = 256; 252 static int ipsec_esp_auth = 0; 253 static int ipsec_ah_keymin = 128; 254 255 #ifdef SYSCTL_DECL 256 SYSCTL_DECL(_net_key); 257 #endif 258 259 #ifdef SYSCTL_INT 260 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 261 &key_debug_level, 0, ""); 262 263 /* max count of trial for the decision of spi value */ 264 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 265 &key_spi_trycnt, 0, ""); 266 267 /* minimum spi value to allocate automatically. */ 268 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 269 &key_spi_minval, 0, ""); 270 271 /* maximun spi value to allocate automatically. */ 272 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 273 &key_spi_maxval, 0, ""); 274 275 /* interval to initialize randseed */ 276 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 277 &key_int_random, 0, ""); 278 279 /* lifetime for larval SA */ 280 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 281 &key_larval_lifetime, 0, ""); 282 283 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 284 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 285 &key_blockacq_count, 0, ""); 286 287 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 288 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 289 &key_blockacq_lifetime, 0, ""); 290 291 /* ESP auth */ 292 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 293 &ipsec_esp_auth, 0, ""); 294 295 /* minimum ESP key length */ 296 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 297 &ipsec_esp_keymin, 0, ""); 298 299 /* minimum AH key length */ 300 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 301 &ipsec_ah_keymin, 0, ""); 302 303 /* perfered old SA rather than new SA */ 304 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 305 &key_prefered_oldsa, 0, ""); 306 #endif /* SYSCTL_INT */ 307 308 #define __LIST_CHAINED(elm) \ 309 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 310 #define LIST_INSERT_TAIL(head, elm, type, field) \ 311 do {\ 312 struct type *curelm = LIST_FIRST(head); \ 313 if (curelm == NULL) {\ 314 LIST_INSERT_HEAD(head, elm, field); \ 315 } else { \ 316 while (LIST_NEXT(curelm, field)) \ 317 curelm = LIST_NEXT(curelm, field);\ 318 LIST_INSERT_AFTER(curelm, elm, field);\ 319 }\ 320 } while (0) 321 322 #define KEY_CHKSASTATE(head, sav) \ 323 /* do */ { \ 324 if ((head) != (sav)) { \ 325 IPSECLOG(LOG_DEBUG, \ 326 "state mismatched (TREE=%d SA=%d)\n", \ 327 (head), (sav)); \ 328 continue; \ 329 } \ 330 } /* while (0) */ 331 332 #define KEY_CHKSPDIR(head, sp) \ 333 do { \ 334 if ((head) != (sp)) { \ 335 IPSECLOG(LOG_DEBUG, \ 336 "direction mismatched (TREE=%d SP=%d), anyway continue.\n",\ 337 (head), (sp)); \ 338 } \ 339 } while (0) 340 341 /* 342 * set parameters into secpolicyindex buffer. 343 * Must allocate secpolicyindex buffer passed to this function. 344 */ 345 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 346 do { \ 347 memset((idx), 0, sizeof(struct secpolicyindex)); \ 348 (idx)->dir = (_dir); \ 349 (idx)->prefs = (ps); \ 350 (idx)->prefd = (pd); \ 351 (idx)->ul_proto = (ulp); \ 352 memcpy(&(idx)->src, (s), ((const struct sockaddr *)(s))->sa_len); \ 353 memcpy(&(idx)->dst, (d), ((const struct sockaddr *)(d))->sa_len); \ 354 } while (0) 355 356 /* 357 * set parameters into secasindex buffer. 358 * Must allocate secasindex buffer before calling this function. 359 */ 360 static int 361 key_setsecasidx (int, int, int, const struct sadb_address *, 362 const struct sadb_address *, struct secasindex *); 363 364 /* key statistics */ 365 struct _keystat { 366 u_long getspi_count; /* the avarage of count to try to get new SPI */ 367 } keystat; 368 369 struct sadb_msghdr { 370 struct sadb_msg *msg; 371 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 372 int extoff[SADB_EXT_MAX + 1]; 373 int extlen[SADB_EXT_MAX + 1]; 374 }; 375 376 static struct secasvar *key_allocsa_policy (const struct secasindex *); 377 #if 0 378 static void key_freeso(struct socket *); 379 static void key_freesp_so(struct secpolicy **); 380 #endif 381 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int); 382 static void key_delsp (struct secpolicy *); 383 static struct secpolicy *key_getsp (const struct secpolicyindex *); 384 static struct secpolicy *key_getspbyid (u_int32_t); 385 static u_int16_t key_newreqid (void); 386 static struct mbuf *key_gather_mbuf (struct mbuf *, 387 const struct sadb_msghdr *, int, int, ...); 388 static int key_spdadd (struct socket *, struct mbuf *, 389 const struct sadb_msghdr *); 390 static u_int32_t key_getnewspid (void); 391 static int key_spddelete (struct socket *, struct mbuf *, 392 const struct sadb_msghdr *); 393 static int key_spddelete2 (struct socket *, struct mbuf *, 394 const struct sadb_msghdr *); 395 static int key_spdget (struct socket *, struct mbuf *, 396 const struct sadb_msghdr *); 397 static int key_spdflush (struct socket *, struct mbuf *, 398 const struct sadb_msghdr *); 399 static int key_spddump (struct socket *, struct mbuf *, 400 const struct sadb_msghdr *); 401 static struct mbuf * key_setspddump (int *errorp, pid_t); 402 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 403 static int key_nat_map (struct socket *, struct mbuf *, 404 const struct sadb_msghdr *); 405 static struct mbuf *key_setdumpsp (struct secpolicy *, 406 u_int8_t, u_int32_t, pid_t); 407 static u_int key_getspreqmsglen (const struct secpolicy *); 408 static int key_spdexpire (struct secpolicy *); 409 static struct secashead *key_newsah (const struct secasindex *); 410 static void key_delsah (struct secashead *); 411 static struct secasvar *key_newsav (struct mbuf *, 412 const struct sadb_msghdr *, struct secashead *, int *, 413 const char*, int); 414 #define KEY_NEWSAV(m, sadb, sah, e) \ 415 key_newsav(m, sadb, sah, e, __func__, __LINE__) 416 static void key_delsav (struct secasvar *); 417 static struct secashead *key_getsah (const struct secasindex *); 418 static struct secasvar *key_checkspidup (const struct secasindex *, u_int32_t); 419 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 420 static int key_setsaval (struct secasvar *, struct mbuf *, 421 const struct sadb_msghdr *); 422 static void key_freesaval(struct secasvar *); 423 static int key_mature (struct secasvar *); 424 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 425 u_int8_t, u_int32_t, u_int32_t); 426 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 427 static struct mbuf *key_setsadbxtype (u_int16_t); 428 static struct mbuf *key_setsadbxfrag (u_int16_t); 429 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 430 static int key_checksalen (const union sockaddr_union *); 431 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 432 u_int32_t, pid_t, u_int16_t); 433 static struct mbuf *key_setsadbsa (struct secasvar *); 434 static struct mbuf *key_setsadbaddr (u_int16_t, 435 const struct sockaddr *, u_int8_t, u_int16_t); 436 #if 0 437 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 438 int, u_int64_t); 439 #endif 440 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 441 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 442 u_int32_t); 443 static void *key_newbuf (const void *, u_int); 444 #ifdef INET6 445 static int key_ismyaddr6 (const struct sockaddr_in6 *); 446 #endif 447 448 static void sysctl_net_keyv2_setup(struct sysctllog **); 449 static void sysctl_net_key_compat_setup(struct sysctllog **); 450 451 /* flags for key_saidx_match() */ 452 #define CMP_HEAD 1 /* protocol, addresses. */ 453 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 454 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 455 #define CMP_EXACTLY 4 /* all elements. */ 456 static int key_saidx_match(const struct secasindex *, 457 const struct secasindex *, int); 458 459 static int key_sockaddr_match(const struct sockaddr *, 460 const struct sockaddr *, int); 461 static int key_bb_match_withmask(const void *, const void *, u_int); 462 static u_int16_t key_satype2proto (u_int8_t); 463 static u_int8_t key_proto2satype (u_int16_t); 464 465 static int key_spidx_match_exactly(const struct secpolicyindex *, 466 const struct secpolicyindex *); 467 static int key_spidx_match_withmask(const struct secpolicyindex *, 468 const struct secpolicyindex *); 469 470 static int key_getspi (struct socket *, struct mbuf *, 471 const struct sadb_msghdr *); 472 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 473 const struct secasindex *); 474 static int key_handle_natt_info (struct secasvar *, 475 const struct sadb_msghdr *); 476 static int key_set_natt_ports (union sockaddr_union *, 477 union sockaddr_union *, 478 const struct sadb_msghdr *); 479 static int key_update (struct socket *, struct mbuf *, 480 const struct sadb_msghdr *); 481 #ifdef IPSEC_DOSEQCHECK 482 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 483 #endif 484 static int key_add (struct socket *, struct mbuf *, 485 const struct sadb_msghdr *); 486 static int key_setident (struct secashead *, struct mbuf *, 487 const struct sadb_msghdr *); 488 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 489 const struct sadb_msghdr *); 490 static int key_delete (struct socket *, struct mbuf *, 491 const struct sadb_msghdr *); 492 static int key_get (struct socket *, struct mbuf *, 493 const struct sadb_msghdr *); 494 495 static void key_getcomb_setlifetime (struct sadb_comb *); 496 static struct mbuf *key_getcomb_esp (void); 497 static struct mbuf *key_getcomb_ah (void); 498 static struct mbuf *key_getcomb_ipcomp (void); 499 static struct mbuf *key_getprop (const struct secasindex *); 500 501 static int key_acquire (const struct secasindex *, struct secpolicy *); 502 #ifndef IPSEC_NONBLOCK_ACQUIRE 503 static struct secacq *key_newacq (const struct secasindex *); 504 static struct secacq *key_getacq (const struct secasindex *); 505 static struct secacq *key_getacqbyseq (u_int32_t); 506 #endif 507 #ifdef notyet 508 static struct secspacq *key_newspacq (const struct secpolicyindex *); 509 static struct secspacq *key_getspacq (const struct secpolicyindex *); 510 #endif 511 static int key_acquire2 (struct socket *, struct mbuf *, 512 const struct sadb_msghdr *); 513 static int key_register (struct socket *, struct mbuf *, 514 const struct sadb_msghdr *); 515 static int key_expire (struct secasvar *); 516 static int key_flush (struct socket *, struct mbuf *, 517 const struct sadb_msghdr *); 518 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 519 int *lenp, pid_t pid); 520 static int key_dump (struct socket *, struct mbuf *, 521 const struct sadb_msghdr *); 522 static int key_promisc (struct socket *, struct mbuf *, 523 const struct sadb_msghdr *); 524 static int key_senderror (struct socket *, struct mbuf *, int); 525 static int key_validate_ext (const struct sadb_ext *, int); 526 static int key_align (struct mbuf *, struct sadb_msghdr *); 527 #if 0 528 static const char *key_getfqdn (void); 529 static const char *key_getuserfqdn (void); 530 #endif 531 static void key_sa_chgstate (struct secasvar *, u_int8_t); 532 static inline void key_sp_dead (struct secpolicy *); 533 static void key_sp_unlink (struct secpolicy *sp); 534 535 static struct mbuf *key_alloc_mbuf (int); 536 537 static void key_timehandler(void *); 538 static void key_timehandler_work(struct work *, void *); 539 static struct callout key_timehandler_ch; 540 static struct workqueue *key_timehandler_wq; 541 static struct work key_timehandler_wk; 542 543 #ifdef IPSEC_REF_DEBUG 544 #define REFLOG(label, p, where, tag) \ 545 log(LOG_DEBUG, "%s:%d: " label " : refcnt=%d (%p)\n.", \ 546 (where), (tag), (p)->refcnt, (p)) 547 #else 548 #define REFLOG(label, p, where, tag) do {} while (0) 549 #endif 550 551 #define SA_ADDREF(p) do { \ 552 (p)->refcnt++; \ 553 REFLOG("SA_ADDREF", (p), __func__, __LINE__); \ 554 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 555 } while (0) 556 #define SA_ADDREF2(p, where, tag) do { \ 557 (p)->refcnt++; \ 558 REFLOG("SA_ADDREF", (p), (where), (tag)); \ 559 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 560 } while (0) 561 #define SA_DELREF(p) do { \ 562 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 563 (p)->refcnt--; \ 564 REFLOG("SA_DELREF", (p), __func__, __LINE__); \ 565 } while (0) 566 #define SA_DELREF2(p, where, tag) do { \ 567 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 568 (p)->refcnt--; \ 569 REFLOG("SA_DELREF", (p), (where), (tag)); \ 570 } while (0) 571 572 #define SP_ADDREF(p) do { \ 573 (p)->refcnt++; \ 574 REFLOG("SP_ADDREF", (p), __func__, __LINE__); \ 575 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 576 } while (0) 577 #define SP_ADDREF2(p, where, tag) do { \ 578 (p)->refcnt++; \ 579 REFLOG("SP_ADDREF", (p), (where), (tag)); \ 580 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 581 } while (0) 582 #define SP_DELREF(p) do { \ 583 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 584 (p)->refcnt--; \ 585 REFLOG("SP_DELREF", (p), __func__, __LINE__); \ 586 } while (0) 587 #define SP_DELREF2(p, where, tag) do { \ 588 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 589 (p)->refcnt--; \ 590 REFLOG("SP_DELREF", (p), (where), (tag)); \ 591 } while (0) 592 593 594 static inline void 595 key_sp_dead(struct secpolicy *sp) 596 { 597 598 /* mark the SP dead */ 599 sp->state = IPSEC_SPSTATE_DEAD; 600 } 601 602 static void 603 key_sp_unlink(struct secpolicy *sp) 604 { 605 606 /* remove from SP index */ 607 KASSERT(__LIST_CHAINED(sp)); 608 LIST_REMOVE(sp, chain); 609 /* Release refcount held just for being on chain */ 610 KEY_FREESP(&sp); 611 } 612 613 614 /* 615 * Return 0 when there are known to be no SP's for the specified 616 * direction. Otherwise return 1. This is used by IPsec code 617 * to optimize performance. 618 */ 619 int 620 key_havesp(u_int dir) 621 { 622 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 623 !LIST_EMPTY(&sptree[dir]) : 1); 624 } 625 626 /* %%% IPsec policy management */ 627 /* 628 * allocating a SP for OUTBOUND or INBOUND packet. 629 * Must call key_freesp() later. 630 * OUT: NULL: not found 631 * others: found and return the pointer. 632 */ 633 struct secpolicy * 634 key_allocsp(const struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 635 { 636 struct secpolicy *sp; 637 int s; 638 639 KASSERT(spidx != NULL); 640 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 641 642 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 643 644 /* get a SP entry */ 645 s = splsoftnet(); /*called from softclock()*/ 646 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 647 printf("*** objects\n"); 648 kdebug_secpolicyindex(spidx); 649 } 650 651 LIST_FOREACH(sp, &sptree[dir], chain) { 652 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 653 printf("*** in SPD\n"); 654 kdebug_secpolicyindex(&sp->spidx); 655 } 656 657 if (sp->state == IPSEC_SPSTATE_DEAD) 658 continue; 659 if (key_spidx_match_withmask(&sp->spidx, spidx)) 660 goto found; 661 } 662 sp = NULL; 663 found: 664 if (sp) { 665 /* sanity check */ 666 KEY_CHKSPDIR(sp->spidx.dir, dir); 667 668 /* found a SPD entry */ 669 sp->lastused = time_uptime; 670 SP_ADDREF2(sp, where, tag); 671 } 672 splx(s); 673 674 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 675 "DP return SP:%p (ID=%u) refcnt %u\n", 676 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 677 return sp; 678 } 679 680 /* 681 * allocating a SP for OUTBOUND or INBOUND packet. 682 * Must call key_freesp() later. 683 * OUT: NULL: not found 684 * others: found and return the pointer. 685 */ 686 struct secpolicy * 687 key_allocsp2(u_int32_t spi, 688 const union sockaddr_union *dst, 689 u_int8_t proto, 690 u_int dir, 691 const char* where, int tag) 692 { 693 struct secpolicy *sp; 694 int s; 695 696 KASSERT(dst != NULL); 697 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 698 699 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 700 701 /* get a SP entry */ 702 s = splsoftnet(); /*called from softclock()*/ 703 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 704 printf("*** objects\n"); 705 printf("spi %u proto %u dir %u\n", spi, proto, dir); 706 kdebug_sockaddr(&dst->sa); 707 } 708 709 LIST_FOREACH(sp, &sptree[dir], chain) { 710 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 711 printf("*** in SPD\n"); 712 kdebug_secpolicyindex(&sp->spidx); 713 } 714 715 if (sp->state == IPSEC_SPSTATE_DEAD) 716 continue; 717 /* compare simple values, then dst address */ 718 if (sp->spidx.ul_proto != proto) 719 continue; 720 /* NB: spi's must exist and match */ 721 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 722 continue; 723 if (key_sockaddr_match(&sp->spidx.dst.sa, &dst->sa, PORT_STRICT)) 724 goto found; 725 } 726 sp = NULL; 727 found: 728 if (sp) { 729 /* sanity check */ 730 KEY_CHKSPDIR(sp->spidx.dir, dir); 731 732 /* found a SPD entry */ 733 sp->lastused = time_uptime; 734 SP_ADDREF2(sp, where, tag); 735 } 736 splx(s); 737 738 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 739 "DP return SP:%p (ID=%u) refcnt %u\n", 740 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 741 return sp; 742 } 743 744 /* 745 * return a policy that matches this particular inbound packet. 746 * XXX slow 747 */ 748 struct secpolicy * 749 key_gettunnel(const struct sockaddr *osrc, 750 const struct sockaddr *odst, 751 const struct sockaddr *isrc, 752 const struct sockaddr *idst, 753 const char* where, int tag) 754 { 755 struct secpolicy *sp; 756 const int dir = IPSEC_DIR_INBOUND; 757 int s; 758 struct ipsecrequest *r1, *r2, *p; 759 struct secpolicyindex spidx; 760 761 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 762 763 if (isrc->sa_family != idst->sa_family) { 764 IPSECLOG(LOG_ERR, "protocol family mismatched %d != %d\n.", 765 isrc->sa_family, idst->sa_family); 766 sp = NULL; 767 goto done; 768 } 769 770 s = splsoftnet(); /*called from softclock()*/ 771 LIST_FOREACH(sp, &sptree[dir], chain) { 772 if (sp->state == IPSEC_SPSTATE_DEAD) 773 continue; 774 775 r1 = r2 = NULL; 776 for (p = sp->req; p; p = p->next) { 777 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 778 continue; 779 780 r1 = r2; 781 r2 = p; 782 783 if (!r1) { 784 /* here we look at address matches only */ 785 spidx = sp->spidx; 786 if (isrc->sa_len > sizeof(spidx.src) || 787 idst->sa_len > sizeof(spidx.dst)) 788 continue; 789 memcpy(&spidx.src, isrc, isrc->sa_len); 790 memcpy(&spidx.dst, idst, idst->sa_len); 791 if (!key_spidx_match_withmask(&sp->spidx, &spidx)) 792 continue; 793 } else { 794 if (!key_sockaddr_match(&r1->saidx.src.sa, isrc, PORT_NONE) || 795 !key_sockaddr_match(&r1->saidx.dst.sa, idst, PORT_NONE)) 796 continue; 797 } 798 799 if (!key_sockaddr_match(&r2->saidx.src.sa, osrc, PORT_NONE) || 800 !key_sockaddr_match(&r2->saidx.dst.sa, odst, PORT_NONE)) 801 continue; 802 803 goto found; 804 } 805 } 806 sp = NULL; 807 found: 808 if (sp) { 809 sp->lastused = time_uptime; 810 SP_ADDREF2(sp, where, tag); 811 } 812 splx(s); 813 done: 814 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 815 "DP return SP:%p (ID=%u) refcnt %u\n", 816 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 817 return sp; 818 } 819 820 /* 821 * allocating an SA entry for an *OUTBOUND* packet. 822 * checking each request entries in SP, and acquire an SA if need. 823 * OUT: 0: there are valid requests. 824 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 825 */ 826 int 827 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 828 { 829 u_int level; 830 int error; 831 832 KASSERT(isr != NULL); 833 KASSERT(saidx != NULL); 834 KASSERTMSG(saidx->mode == IPSEC_MODE_TRANSPORT || 835 saidx->mode == IPSEC_MODE_TUNNEL, 836 "unexpected policy %u", saidx->mode); 837 838 /* get current level */ 839 level = ipsec_get_reqlevel(isr); 840 841 /* 842 * XXX guard against protocol callbacks from the crypto 843 * thread as they reference ipsecrequest.sav which we 844 * temporarily null out below. Need to rethink how we 845 * handle bundled SA's in the callback thread. 846 */ 847 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 848 #if 0 849 /* 850 * We do allocate new SA only if the state of SA in the holder is 851 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 852 */ 853 if (isr->sav != NULL) { 854 if (isr->sav->sah == NULL) 855 panic("key_checkrequest: sah is null"); 856 if (isr->sav == (struct secasvar *)LIST_FIRST( 857 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 858 KEY_FREESAV(&isr->sav); 859 isr->sav = NULL; 860 } 861 } 862 #else 863 /* 864 * we free any SA stashed in the IPsec request because a different 865 * SA may be involved each time this request is checked, either 866 * because new SAs are being configured, or this request is 867 * associated with an unconnected datagram socket, or this request 868 * is associated with a system default policy. 869 * 870 * The operation may have negative impact to performance. We may 871 * want to check cached SA carefully, rather than picking new SA 872 * every time. 873 */ 874 if (isr->sav != NULL) { 875 KEY_FREESAV(&isr->sav); 876 isr->sav = NULL; 877 } 878 #endif 879 880 /* 881 * new SA allocation if no SA found. 882 * key_allocsa_policy should allocate the oldest SA available. 883 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 884 */ 885 if (isr->sav == NULL) 886 isr->sav = key_allocsa_policy(saidx); 887 888 /* When there is SA. */ 889 if (isr->sav != NULL) { 890 if (isr->sav->state != SADB_SASTATE_MATURE && 891 isr->sav->state != SADB_SASTATE_DYING) 892 return EINVAL; 893 return 0; 894 } 895 896 /* there is no SA */ 897 error = key_acquire(saidx, isr->sp); 898 if (error != 0) { 899 /* XXX What should I do ? */ 900 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 901 error); 902 return error; 903 } 904 905 if (level != IPSEC_LEVEL_REQUIRE) { 906 /* XXX sigh, the interface to this routine is botched */ 907 KASSERTMSG(isr->sav == NULL, "unexpected SA"); 908 return 0; 909 } else { 910 return ENOENT; 911 } 912 } 913 914 /* 915 * allocating a SA for policy entry from SAD. 916 * NOTE: searching SAD of aliving state. 917 * OUT: NULL: not found. 918 * others: found and return the pointer. 919 */ 920 static struct secasvar * 921 key_allocsa_policy(const struct secasindex *saidx) 922 { 923 struct secashead *sah; 924 struct secasvar *sav; 925 u_int stateidx, state; 926 const u_int *saorder_state_valid; 927 int arraysize; 928 929 LIST_FOREACH(sah, &sahtree, chain) { 930 if (sah->state == SADB_SASTATE_DEAD) 931 continue; 932 if (key_saidx_match(&sah->saidx, saidx, CMP_MODE_REQID)) 933 goto found; 934 } 935 936 return NULL; 937 938 found: 939 940 /* 941 * search a valid state list for outbound packet. 942 * This search order is important. 943 */ 944 if (key_prefered_oldsa) { 945 saorder_state_valid = saorder_state_valid_prefer_old; 946 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 947 } else { 948 saorder_state_valid = saorder_state_valid_prefer_new; 949 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 950 } 951 952 /* search valid state */ 953 for (stateidx = 0; 954 stateidx < arraysize; 955 stateidx++) { 956 957 state = saorder_state_valid[stateidx]; 958 959 sav = key_do_allocsa_policy(sah, state); 960 if (sav != NULL) 961 return sav; 962 } 963 964 return NULL; 965 } 966 967 /* 968 * searching SAD with direction, protocol, mode and state. 969 * called by key_allocsa_policy(). 970 * OUT: 971 * NULL : not found 972 * others : found, pointer to a SA. 973 */ 974 static struct secasvar * 975 key_do_allocsa_policy(struct secashead *sah, u_int state) 976 { 977 struct secasvar *sav, *candidate, *d; 978 979 /* initilize */ 980 candidate = NULL; 981 982 LIST_FOREACH(sav, &sah->savtree[state], chain) { 983 /* sanity check */ 984 KEY_CHKSASTATE(sav->state, state); 985 986 /* initialize */ 987 if (candidate == NULL) { 988 candidate = sav; 989 continue; 990 } 991 992 /* Which SA is the better ? */ 993 994 /* sanity check 2 */ 995 KASSERT(candidate->lft_c != NULL); 996 KASSERT(sav->lft_c != NULL); 997 998 /* What the best method is to compare ? */ 999 if (key_prefered_oldsa) { 1000 if (candidate->lft_c->sadb_lifetime_addtime > 1001 sav->lft_c->sadb_lifetime_addtime) { 1002 candidate = sav; 1003 } 1004 continue; 1005 /*NOTREACHED*/ 1006 } 1007 1008 /* prefered new sa rather than old sa */ 1009 if (candidate->lft_c->sadb_lifetime_addtime < 1010 sav->lft_c->sadb_lifetime_addtime) { 1011 d = candidate; 1012 candidate = sav; 1013 } else 1014 d = sav; 1015 1016 /* 1017 * prepared to delete the SA when there is more 1018 * suitable candidate and the lifetime of the SA is not 1019 * permanent. 1020 */ 1021 if (d->lft_c->sadb_lifetime_addtime != 0) { 1022 struct mbuf *m, *result = 0; 1023 uint8_t satype; 1024 1025 key_sa_chgstate(d, SADB_SASTATE_DEAD); 1026 1027 KASSERT(d->refcnt > 0); 1028 1029 satype = key_proto2satype(d->sah->saidx.proto); 1030 if (satype == 0) 1031 goto msgfail; 1032 1033 m = key_setsadbmsg(SADB_DELETE, 0, 1034 satype, 0, 0, d->refcnt - 1); 1035 if (!m) 1036 goto msgfail; 1037 result = m; 1038 1039 /* set sadb_address for saidx's. */ 1040 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1041 &d->sah->saidx.src.sa, 1042 d->sah->saidx.src.sa.sa_len << 3, 1043 IPSEC_ULPROTO_ANY); 1044 if (!m) 1045 goto msgfail; 1046 m_cat(result, m); 1047 1048 /* set sadb_address for saidx's. */ 1049 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1050 &d->sah->saidx.src.sa, 1051 d->sah->saidx.src.sa.sa_len << 3, 1052 IPSEC_ULPROTO_ANY); 1053 if (!m) 1054 goto msgfail; 1055 m_cat(result, m); 1056 1057 /* create SA extension */ 1058 m = key_setsadbsa(d); 1059 if (!m) 1060 goto msgfail; 1061 m_cat(result, m); 1062 1063 if (result->m_len < sizeof(struct sadb_msg)) { 1064 result = m_pullup(result, 1065 sizeof(struct sadb_msg)); 1066 if (result == NULL) 1067 goto msgfail; 1068 } 1069 1070 result->m_pkthdr.len = 0; 1071 for (m = result; m; m = m->m_next) 1072 result->m_pkthdr.len += m->m_len; 1073 mtod(result, struct sadb_msg *)->sadb_msg_len = 1074 PFKEY_UNIT64(result->m_pkthdr.len); 1075 1076 key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 1077 result = 0; 1078 msgfail: 1079 if (result) 1080 m_freem(result); 1081 KEY_FREESAV(&d); 1082 } 1083 } 1084 1085 if (candidate) { 1086 SA_ADDREF(candidate); 1087 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1088 "DP cause refcnt++:%d SA:%p\n", 1089 candidate->refcnt, candidate); 1090 } 1091 return candidate; 1092 } 1093 1094 /* 1095 * allocating a usable SA entry for a *INBOUND* packet. 1096 * Must call key_freesav() later. 1097 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1098 * NULL: not found, or error occurred. 1099 * 1100 * In the comparison, no source address is used--for RFC2401 conformance. 1101 * To quote, from section 4.1: 1102 * A security association is uniquely identified by a triple consisting 1103 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1104 * security protocol (AH or ESP) identifier. 1105 * Note that, however, we do need to keep source address in IPsec SA. 1106 * IKE specification and PF_KEY specification do assume that we 1107 * keep source address in IPsec SA. We see a tricky situation here. 1108 * 1109 * sport and dport are used for NAT-T. network order is always used. 1110 */ 1111 struct secasvar * 1112 key_allocsa( 1113 const union sockaddr_union *dst, 1114 u_int proto, 1115 u_int32_t spi, 1116 u_int16_t sport, 1117 u_int16_t dport, 1118 const char* where, int tag) 1119 { 1120 struct secashead *sah; 1121 struct secasvar *sav; 1122 u_int stateidx, state; 1123 const u_int *saorder_state_valid; 1124 int arraysize, chkport; 1125 int s; 1126 1127 int must_check_spi = 1; 1128 int must_check_alg = 0; 1129 u_int16_t cpi = 0; 1130 u_int8_t algo = 0; 1131 1132 if ((sport != 0) && (dport != 0)) 1133 chkport = PORT_STRICT; 1134 else 1135 chkport = PORT_NONE; 1136 1137 KASSERT(dst != NULL); 1138 1139 /* 1140 * XXX IPCOMP case 1141 * We use cpi to define spi here. In the case where cpi <= 1142 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1143 * the real spi. In this case, don't check the spi but check the 1144 * algorithm 1145 */ 1146 1147 if (proto == IPPROTO_IPCOMP) { 1148 u_int32_t tmp; 1149 tmp = ntohl(spi); 1150 cpi = (u_int16_t) tmp; 1151 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1152 algo = (u_int8_t) cpi; 1153 must_check_spi = 0; 1154 must_check_alg = 1; 1155 } 1156 } 1157 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1158 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1159 where, tag, must_check_spi, must_check_alg); 1160 1161 1162 /* 1163 * searching SAD. 1164 * XXX: to be checked internal IP header somewhere. Also when 1165 * IPsec tunnel packet is received. But ESP tunnel mode is 1166 * encrypted so we can't check internal IP header. 1167 */ 1168 s = splsoftnet(); /*called from softclock()*/ 1169 if (key_prefered_oldsa) { 1170 saorder_state_valid = saorder_state_valid_prefer_old; 1171 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1172 } else { 1173 saorder_state_valid = saorder_state_valid_prefer_new; 1174 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1175 } 1176 LIST_FOREACH(sah, &sahtree, chain) { 1177 /* search valid state */ 1178 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1179 state = saorder_state_valid[stateidx]; 1180 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1181 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1182 "try match spi %#x, %#x\n", 1183 ntohl(spi), ntohl(sav->spi)); 1184 /* sanity check */ 1185 KEY_CHKSASTATE(sav->state, state); 1186 /* do not return entries w/ unusable state */ 1187 if (sav->state != SADB_SASTATE_MATURE && 1188 sav->state != SADB_SASTATE_DYING) { 1189 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1190 "bad state %d\n", sav->state); 1191 continue; 1192 } 1193 if (proto != sav->sah->saidx.proto) { 1194 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1195 "proto fail %d != %d\n", 1196 proto, sav->sah->saidx.proto); 1197 continue; 1198 } 1199 if (must_check_spi && spi != sav->spi) { 1200 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1201 "spi fail %#x != %#x\n", 1202 ntohl(spi), ntohl(sav->spi)); 1203 continue; 1204 } 1205 /* XXX only on the ipcomp case */ 1206 if (must_check_alg && algo != sav->alg_comp) { 1207 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1208 "algo fail %d != %d\n", 1209 algo, sav->alg_comp); 1210 continue; 1211 } 1212 1213 #if 0 /* don't check src */ 1214 /* Fix port in src->sa */ 1215 1216 /* check src address */ 1217 if (!key_sockaddr_match(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE)) 1218 continue; 1219 #endif 1220 /* fix port of dst address XXX*/ 1221 key_porttosaddr(__UNCONST(dst), dport); 1222 /* check dst address */ 1223 if (!key_sockaddr_match(&dst->sa, &sav->sah->saidx.dst.sa, chkport)) 1224 continue; 1225 SA_ADDREF2(sav, where, tag); 1226 goto done; 1227 } 1228 } 1229 } 1230 sav = NULL; 1231 done: 1232 splx(s); 1233 1234 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1235 "DP return SA:%p; refcnt %u\n", sav, sav ? sav->refcnt : 0); 1236 return sav; 1237 } 1238 1239 /* 1240 * Must be called after calling key_allocsp(). 1241 * For both the packet without socket and key_freeso(). 1242 */ 1243 void 1244 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1245 { 1246 struct secpolicy *sp = *spp; 1247 1248 KASSERT(sp != NULL); 1249 1250 SP_DELREF2(sp, where, tag); 1251 1252 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1253 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1254 sp, sp->id, where, tag, sp->refcnt); 1255 1256 if (sp->refcnt == 0) { 1257 *spp = NULL; 1258 key_delsp(sp); 1259 } 1260 } 1261 1262 #if 0 1263 /* 1264 * Must be called after calling key_allocsp(). 1265 * For the packet with socket. 1266 */ 1267 static void 1268 key_freeso(struct socket *so) 1269 { 1270 /* sanity check */ 1271 KASSERT(so != NULL); 1272 1273 switch (so->so_proto->pr_domain->dom_family) { 1274 #ifdef INET 1275 case PF_INET: 1276 { 1277 struct inpcb *pcb = sotoinpcb(so); 1278 1279 /* Does it have a PCB ? */ 1280 if (pcb == NULL) 1281 return; 1282 1283 struct inpcbpolicy *sp = pcb->inp_sp; 1284 key_freesp_so(&sp->sp_in); 1285 key_freesp_so(&sp->sp_out); 1286 } 1287 break; 1288 #endif 1289 #ifdef INET6 1290 case PF_INET6: 1291 { 1292 #ifdef HAVE_NRL_INPCB 1293 struct inpcb *pcb = sotoinpcb(so); 1294 struct inpcbpolicy *sp = pcb->inp_sp; 1295 1296 /* Does it have a PCB ? */ 1297 if (pcb == NULL) 1298 return; 1299 key_freesp_so(&sp->sp_in); 1300 key_freesp_so(&sp->sp_out); 1301 #else 1302 struct in6pcb *pcb = sotoin6pcb(so); 1303 1304 /* Does it have a PCB ? */ 1305 if (pcb == NULL) 1306 return; 1307 key_freesp_so(&pcb->in6p_sp->sp_in); 1308 key_freesp_so(&pcb->in6p_sp->sp_out); 1309 #endif 1310 } 1311 break; 1312 #endif /* INET6 */ 1313 default: 1314 IPSECLOG(LOG_DEBUG, "unknown address family=%d.\n", 1315 so->so_proto->pr_domain->dom_family); 1316 return; 1317 } 1318 } 1319 1320 static void 1321 key_freesp_so(struct secpolicy **sp) 1322 { 1323 1324 KASSERT(sp != NULL); 1325 KASSERT(*sp != NULL); 1326 1327 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1328 (*sp)->policy == IPSEC_POLICY_BYPASS) 1329 return; 1330 1331 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1332 "invalid policy %u", (*sp)->policy); 1333 KEY_FREESP(sp); 1334 } 1335 #endif 1336 1337 /* 1338 * Must be called after calling key_allocsa(). 1339 * This function is called by key_freesp() to free some SA allocated 1340 * for a policy. 1341 */ 1342 void 1343 key_freesav(struct secasvar **psav, const char* where, int tag) 1344 { 1345 struct secasvar *sav = *psav; 1346 1347 KASSERT(sav != NULL); 1348 1349 SA_DELREF2(sav, where, tag); 1350 1351 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1352 "DP SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1353 sav, (u_long)ntohl(sav->spi), where, tag, sav->refcnt); 1354 1355 if (sav->refcnt == 0) { 1356 *psav = NULL; 1357 key_delsav(sav); 1358 } 1359 } 1360 1361 /* %%% SPD management */ 1362 /* 1363 * free security policy entry. 1364 */ 1365 static void 1366 key_delsp(struct secpolicy *sp) 1367 { 1368 int s; 1369 1370 KASSERT(sp != NULL); 1371 1372 key_sp_dead(sp); 1373 1374 KASSERTMSG(sp->refcnt == 0, 1375 "SP with references deleted (refcnt %u)", sp->refcnt); 1376 1377 s = splsoftnet(); /*called from softclock()*/ 1378 1379 { 1380 struct ipsecrequest *isr = sp->req, *nextisr; 1381 1382 while (isr != NULL) { 1383 if (isr->sav != NULL) { 1384 KEY_FREESAV(&isr->sav); 1385 isr->sav = NULL; 1386 } 1387 1388 nextisr = isr->next; 1389 kmem_intr_free(isr, sizeof(*isr)); 1390 isr = nextisr; 1391 } 1392 } 1393 1394 kmem_intr_free(sp, sizeof(*sp)); 1395 1396 splx(s); 1397 } 1398 1399 /* 1400 * search SPD 1401 * OUT: NULL : not found 1402 * others : found, pointer to a SP. 1403 */ 1404 static struct secpolicy * 1405 key_getsp(const struct secpolicyindex *spidx) 1406 { 1407 struct secpolicy *sp; 1408 1409 KASSERT(spidx != NULL); 1410 1411 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1412 if (sp->state == IPSEC_SPSTATE_DEAD) 1413 continue; 1414 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1415 SP_ADDREF(sp); 1416 return sp; 1417 } 1418 } 1419 1420 return NULL; 1421 } 1422 1423 /* 1424 * get SP by index. 1425 * OUT: NULL : not found 1426 * others : found, pointer to a SP. 1427 */ 1428 static struct secpolicy * 1429 key_getspbyid(u_int32_t id) 1430 { 1431 struct secpolicy *sp; 1432 1433 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1434 if (sp->state == IPSEC_SPSTATE_DEAD) 1435 continue; 1436 if (sp->id == id) { 1437 SP_ADDREF(sp); 1438 return sp; 1439 } 1440 } 1441 1442 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1443 if (sp->state == IPSEC_SPSTATE_DEAD) 1444 continue; 1445 if (sp->id == id) { 1446 SP_ADDREF(sp); 1447 return sp; 1448 } 1449 } 1450 1451 return NULL; 1452 } 1453 1454 struct secpolicy * 1455 key_newsp(const char* where, int tag) 1456 { 1457 struct secpolicy *newsp = NULL; 1458 1459 newsp = kmem_intr_zalloc(sizeof(struct secpolicy), KM_NOSLEEP); 1460 if (newsp != NULL) 1461 newsp->refcnt = 1; 1462 1463 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1464 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1465 return newsp; 1466 } 1467 1468 /* 1469 * create secpolicy structure from sadb_x_policy structure. 1470 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1471 * so must be set properly later. 1472 */ 1473 struct secpolicy * 1474 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1475 { 1476 struct secpolicy *newsp; 1477 1478 KASSERT(!cpu_softintr_p()); 1479 KASSERT(xpl0 != NULL); 1480 KASSERT(len >= sizeof(*xpl0)); 1481 1482 if (len != PFKEY_EXTLEN(xpl0)) { 1483 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1484 *error = EINVAL; 1485 return NULL; 1486 } 1487 1488 newsp = KEY_NEWSP(); 1489 if (newsp == NULL) { 1490 *error = ENOBUFS; 1491 return NULL; 1492 } 1493 1494 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1495 newsp->policy = xpl0->sadb_x_policy_type; 1496 1497 /* check policy */ 1498 switch (xpl0->sadb_x_policy_type) { 1499 case IPSEC_POLICY_DISCARD: 1500 case IPSEC_POLICY_NONE: 1501 case IPSEC_POLICY_ENTRUST: 1502 case IPSEC_POLICY_BYPASS: 1503 newsp->req = NULL; 1504 *error = 0; 1505 return newsp; 1506 1507 case IPSEC_POLICY_IPSEC: 1508 /* Continued */ 1509 break; 1510 default: 1511 IPSECLOG(LOG_DEBUG, "invalid policy type.\n"); 1512 KEY_FREESP(&newsp); 1513 *error = EINVAL; 1514 return NULL; 1515 } 1516 1517 /* IPSEC_POLICY_IPSEC */ 1518 { 1519 int tlen; 1520 const struct sadb_x_ipsecrequest *xisr; 1521 uint16_t xisr_reqid; 1522 struct ipsecrequest **p_isr = &newsp->req; 1523 1524 /* validity check */ 1525 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1526 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1527 *error = EINVAL; 1528 goto free_exit; 1529 } 1530 1531 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1532 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1533 1534 while (tlen > 0) { 1535 /* length check */ 1536 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1537 IPSECLOG(LOG_DEBUG, "invalid ipsecrequest length.\n"); 1538 *error = EINVAL; 1539 goto free_exit; 1540 } 1541 1542 /* allocate request buffer */ 1543 *p_isr = kmem_zalloc(sizeof(**p_isr), KM_SLEEP); 1544 1545 /* set values */ 1546 (*p_isr)->next = NULL; 1547 1548 switch (xisr->sadb_x_ipsecrequest_proto) { 1549 case IPPROTO_ESP: 1550 case IPPROTO_AH: 1551 case IPPROTO_IPCOMP: 1552 break; 1553 default: 1554 IPSECLOG(LOG_DEBUG, "invalid proto type=%u\n", 1555 xisr->sadb_x_ipsecrequest_proto); 1556 *error = EPROTONOSUPPORT; 1557 goto free_exit; 1558 } 1559 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1560 1561 switch (xisr->sadb_x_ipsecrequest_mode) { 1562 case IPSEC_MODE_TRANSPORT: 1563 case IPSEC_MODE_TUNNEL: 1564 break; 1565 case IPSEC_MODE_ANY: 1566 default: 1567 IPSECLOG(LOG_DEBUG, "invalid mode=%u\n", 1568 xisr->sadb_x_ipsecrequest_mode); 1569 *error = EINVAL; 1570 goto free_exit; 1571 } 1572 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1573 1574 switch (xisr->sadb_x_ipsecrequest_level) { 1575 case IPSEC_LEVEL_DEFAULT: 1576 case IPSEC_LEVEL_USE: 1577 case IPSEC_LEVEL_REQUIRE: 1578 break; 1579 case IPSEC_LEVEL_UNIQUE: 1580 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1581 /* validity check */ 1582 /* 1583 * If range violation of reqid, kernel will 1584 * update it, don't refuse it. 1585 */ 1586 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1587 IPSECLOG(LOG_DEBUG, 1588 "reqid=%d range " 1589 "violation, updated by kernel.\n", 1590 xisr_reqid); 1591 xisr_reqid = 0; 1592 } 1593 1594 /* allocate new reqid id if reqid is zero. */ 1595 if (xisr_reqid == 0) { 1596 u_int16_t reqid = key_newreqid(); 1597 if (reqid == 0) { 1598 *error = ENOBUFS; 1599 goto free_exit; 1600 } 1601 (*p_isr)->saidx.reqid = reqid; 1602 } else { 1603 /* set it for manual keying. */ 1604 (*p_isr)->saidx.reqid = xisr_reqid; 1605 } 1606 break; 1607 1608 default: 1609 IPSECLOG(LOG_DEBUG, "invalid level=%u\n", 1610 xisr->sadb_x_ipsecrequest_level); 1611 *error = EINVAL; 1612 goto free_exit; 1613 } 1614 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1615 1616 /* set IP addresses if there */ 1617 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1618 const struct sockaddr *paddr; 1619 1620 paddr = (const struct sockaddr *)(xisr + 1); 1621 1622 /* validity check */ 1623 if (paddr->sa_len > sizeof((*p_isr)->saidx.src)) { 1624 IPSECLOG(LOG_DEBUG, "invalid request " 1625 "address length.\n"); 1626 *error = EINVAL; 1627 goto free_exit; 1628 } 1629 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1630 1631 paddr = (const struct sockaddr *)((const char *)paddr 1632 + paddr->sa_len); 1633 1634 /* validity check */ 1635 if (paddr->sa_len > sizeof((*p_isr)->saidx.dst)) { 1636 IPSECLOG(LOG_DEBUG, "invalid request " 1637 "address length.\n"); 1638 *error = EINVAL; 1639 goto free_exit; 1640 } 1641 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1642 } 1643 1644 (*p_isr)->sav = NULL; 1645 (*p_isr)->sp = newsp; 1646 1647 /* initialization for the next. */ 1648 p_isr = &(*p_isr)->next; 1649 tlen -= xisr->sadb_x_ipsecrequest_len; 1650 1651 /* validity check */ 1652 if (tlen < 0) { 1653 IPSECLOG(LOG_DEBUG, "becoming tlen < 0.\n"); 1654 *error = EINVAL; 1655 goto free_exit; 1656 } 1657 1658 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr + 1659 xisr->sadb_x_ipsecrequest_len); 1660 } 1661 } 1662 1663 *error = 0; 1664 return newsp; 1665 1666 free_exit: 1667 KEY_FREESP(&newsp); 1668 return NULL; 1669 } 1670 1671 static u_int16_t 1672 key_newreqid(void) 1673 { 1674 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1675 1676 auto_reqid = (auto_reqid == 0xffff ? 1677 IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1678 1679 /* XXX should be unique check */ 1680 1681 return auto_reqid; 1682 } 1683 1684 /* 1685 * copy secpolicy struct to sadb_x_policy structure indicated. 1686 */ 1687 struct mbuf * 1688 key_sp2msg(const struct secpolicy *sp) 1689 { 1690 struct sadb_x_policy *xpl; 1691 int tlen; 1692 char *p; 1693 struct mbuf *m; 1694 1695 KASSERT(sp != NULL); 1696 1697 tlen = key_getspreqmsglen(sp); 1698 1699 m = key_alloc_mbuf(tlen); 1700 if (!m || m->m_next) { /*XXX*/ 1701 if (m) 1702 m_freem(m); 1703 return NULL; 1704 } 1705 1706 m->m_len = tlen; 1707 m->m_next = NULL; 1708 xpl = mtod(m, struct sadb_x_policy *); 1709 memset(xpl, 0, tlen); 1710 1711 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1712 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1713 xpl->sadb_x_policy_type = sp->policy; 1714 xpl->sadb_x_policy_dir = sp->spidx.dir; 1715 xpl->sadb_x_policy_id = sp->id; 1716 p = (char *)xpl + sizeof(*xpl); 1717 1718 /* if is the policy for ipsec ? */ 1719 if (sp->policy == IPSEC_POLICY_IPSEC) { 1720 struct sadb_x_ipsecrequest *xisr; 1721 struct ipsecrequest *isr; 1722 1723 for (isr = sp->req; isr != NULL; isr = isr->next) { 1724 1725 xisr = (struct sadb_x_ipsecrequest *)p; 1726 1727 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1728 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1729 xisr->sadb_x_ipsecrequest_level = isr->level; 1730 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1731 1732 p += sizeof(*xisr); 1733 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1734 p += isr->saidx.src.sa.sa_len; 1735 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1736 p += isr->saidx.src.sa.sa_len; 1737 1738 xisr->sadb_x_ipsecrequest_len = 1739 PFKEY_ALIGN8(sizeof(*xisr) 1740 + isr->saidx.src.sa.sa_len 1741 + isr->saidx.dst.sa.sa_len); 1742 } 1743 } 1744 1745 return m; 1746 } 1747 1748 /* m will not be freed nor modified */ 1749 static struct mbuf * 1750 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1751 int ndeep, int nitem, ...) 1752 { 1753 va_list ap; 1754 int idx; 1755 int i; 1756 struct mbuf *result = NULL, *n; 1757 int len; 1758 1759 KASSERT(m != NULL); 1760 KASSERT(mhp != NULL); 1761 1762 va_start(ap, nitem); 1763 for (i = 0; i < nitem; i++) { 1764 idx = va_arg(ap, int); 1765 if (idx < 0 || idx > SADB_EXT_MAX) 1766 goto fail; 1767 /* don't attempt to pull empty extension */ 1768 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1769 continue; 1770 if (idx != SADB_EXT_RESERVED && 1771 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1772 continue; 1773 1774 if (idx == SADB_EXT_RESERVED) { 1775 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 1776 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1777 MGETHDR(n, M_DONTWAIT, MT_DATA); 1778 if (!n) 1779 goto fail; 1780 n->m_len = len; 1781 n->m_next = NULL; 1782 m_copydata(m, 0, sizeof(struct sadb_msg), 1783 mtod(n, void *)); 1784 } else if (i < ndeep) { 1785 len = mhp->extlen[idx]; 1786 n = key_alloc_mbuf(len); 1787 if (!n || n->m_next) { /*XXX*/ 1788 if (n) 1789 m_freem(n); 1790 goto fail; 1791 } 1792 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1793 mtod(n, void *)); 1794 } else { 1795 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1796 M_DONTWAIT); 1797 } 1798 if (n == NULL) 1799 goto fail; 1800 1801 if (result) 1802 m_cat(result, n); 1803 else 1804 result = n; 1805 } 1806 va_end(ap); 1807 1808 if (result && (result->m_flags & M_PKTHDR) != 0) { 1809 result->m_pkthdr.len = 0; 1810 for (n = result; n; n = n->m_next) 1811 result->m_pkthdr.len += n->m_len; 1812 } 1813 1814 return result; 1815 1816 fail: 1817 va_end(ap); 1818 m_freem(result); 1819 return NULL; 1820 } 1821 1822 /* 1823 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1824 * add an entry to SP database, when received 1825 * <base, address(SD), (lifetime(H),) policy> 1826 * from the user(?). 1827 * Adding to SP database, 1828 * and send 1829 * <base, address(SD), (lifetime(H),) policy> 1830 * to the socket which was send. 1831 * 1832 * SPDADD set a unique policy entry. 1833 * SPDSETIDX like SPDADD without a part of policy requests. 1834 * SPDUPDATE replace a unique policy entry. 1835 * 1836 * m will always be freed. 1837 */ 1838 static int 1839 key_spdadd(struct socket *so, struct mbuf *m, 1840 const struct sadb_msghdr *mhp) 1841 { 1842 const struct sadb_address *src0, *dst0; 1843 const struct sadb_x_policy *xpl0; 1844 struct sadb_x_policy *xpl; 1845 const struct sadb_lifetime *lft = NULL; 1846 struct secpolicyindex spidx; 1847 struct secpolicy *newsp; 1848 int error; 1849 1850 KASSERT(!cpu_softintr_p()); 1851 KASSERT(so != NULL); 1852 KASSERT(m != NULL); 1853 KASSERT(mhp != NULL); 1854 KASSERT(mhp->msg != NULL); 1855 1856 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1857 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1858 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1859 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1860 return key_senderror(so, m, EINVAL); 1861 } 1862 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1863 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1864 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1865 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1866 return key_senderror(so, m, EINVAL); 1867 } 1868 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1869 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < 1870 sizeof(struct sadb_lifetime)) { 1871 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1872 return key_senderror(so, m, EINVAL); 1873 } 1874 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1875 } 1876 1877 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1878 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1879 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1880 1881 /* make secindex */ 1882 /* XXX boundary check against sa_len */ 1883 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1884 src0 + 1, 1885 dst0 + 1, 1886 src0->sadb_address_prefixlen, 1887 dst0->sadb_address_prefixlen, 1888 src0->sadb_address_proto, 1889 &spidx); 1890 1891 /* checking the direciton. */ 1892 switch (xpl0->sadb_x_policy_dir) { 1893 case IPSEC_DIR_INBOUND: 1894 case IPSEC_DIR_OUTBOUND: 1895 break; 1896 default: 1897 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 1898 mhp->msg->sadb_msg_errno = EINVAL; 1899 return 0; 1900 } 1901 1902 /* check policy */ 1903 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1904 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST || 1905 xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1906 IPSECLOG(LOG_DEBUG, "Invalid policy type.\n"); 1907 return key_senderror(so, m, EINVAL); 1908 } 1909 1910 /* policy requests are mandatory when action is ipsec. */ 1911 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && 1912 xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 1913 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1914 IPSECLOG(LOG_DEBUG, "some policy requests part required.\n"); 1915 return key_senderror(so, m, EINVAL); 1916 } 1917 1918 /* 1919 * checking there is SP already or not. 1920 * SPDUPDATE doesn't depend on whether there is a SP or not. 1921 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1922 * then error. 1923 */ 1924 newsp = key_getsp(&spidx); 1925 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1926 if (newsp) { 1927 key_sp_dead(newsp); 1928 key_sp_unlink(newsp); /* XXX jrs ordering */ 1929 KEY_FREESP(&newsp); 1930 newsp = NULL; 1931 } 1932 } else { 1933 if (newsp != NULL) { 1934 KEY_FREESP(&newsp); 1935 IPSECLOG(LOG_DEBUG, "a SP entry exists already.\n"); 1936 return key_senderror(so, m, EEXIST); 1937 } 1938 } 1939 1940 /* allocation new SP entry */ 1941 newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error); 1942 if (newsp == NULL) { 1943 return key_senderror(so, m, error); 1944 } 1945 1946 newsp->id = key_getnewspid(); 1947 if (newsp->id == 0) { 1948 kmem_free(newsp, sizeof(*newsp)); 1949 return key_senderror(so, m, ENOBUFS); 1950 } 1951 1952 /* XXX boundary check against sa_len */ 1953 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1954 src0 + 1, 1955 dst0 + 1, 1956 src0->sadb_address_prefixlen, 1957 dst0->sadb_address_prefixlen, 1958 src0->sadb_address_proto, 1959 &newsp->spidx); 1960 1961 /* sanity check on addr pair */ 1962 if (((const struct sockaddr *)(src0 + 1))->sa_family != 1963 ((const struct sockaddr *)(dst0+ 1))->sa_family) { 1964 kmem_free(newsp, sizeof(*newsp)); 1965 return key_senderror(so, m, EINVAL); 1966 } 1967 if (((const struct sockaddr *)(src0 + 1))->sa_len != 1968 ((const struct sockaddr *)(dst0+ 1))->sa_len) { 1969 kmem_free(newsp, sizeof(*newsp)); 1970 return key_senderror(so, m, EINVAL); 1971 } 1972 1973 newsp->created = time_uptime; 1974 newsp->lastused = newsp->created; 1975 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1976 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1977 1978 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1979 newsp->state = IPSEC_SPSTATE_ALIVE; 1980 if (newsp->policy == IPSEC_POLICY_IPSEC) 1981 KASSERT(newsp->req != NULL); 1982 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1983 1984 #ifdef notyet 1985 /* delete the entry in spacqtree */ 1986 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1987 struct secspacq *spacq = key_getspacq(&spidx); 1988 if (spacq != NULL) { 1989 /* reset counter in order to deletion by timehandler. */ 1990 spacq->created = time_uptime; 1991 spacq->count = 0; 1992 } 1993 } 1994 #endif 1995 1996 /* Invalidate all cached SPD pointers in the PCBs. */ 1997 ipsec_invalpcbcacheall(); 1998 1999 #if defined(GATEWAY) 2000 /* Invalidate the ipflow cache, as well. */ 2001 ipflow_invalidate_all(0); 2002 #ifdef INET6 2003 if (in6_present) 2004 ip6flow_invalidate_all(0); 2005 #endif /* INET6 */ 2006 #endif /* GATEWAY */ 2007 2008 { 2009 struct mbuf *n, *mpolicy; 2010 struct sadb_msg *newmsg; 2011 int off; 2012 2013 /* create new sadb_msg to reply. */ 2014 if (lft) { 2015 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 2016 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 2017 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2018 } else { 2019 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2020 SADB_X_EXT_POLICY, 2021 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2022 } 2023 if (!n) 2024 return key_senderror(so, m, ENOBUFS); 2025 2026 if (n->m_len < sizeof(*newmsg)) { 2027 n = m_pullup(n, sizeof(*newmsg)); 2028 if (!n) 2029 return key_senderror(so, m, ENOBUFS); 2030 } 2031 newmsg = mtod(n, struct sadb_msg *); 2032 newmsg->sadb_msg_errno = 0; 2033 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2034 2035 off = 0; 2036 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2037 sizeof(*xpl), &off); 2038 if (mpolicy == NULL) { 2039 /* n is already freed */ 2040 return key_senderror(so, m, ENOBUFS); 2041 } 2042 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2043 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2044 m_freem(n); 2045 return key_senderror(so, m, EINVAL); 2046 } 2047 xpl->sadb_x_policy_id = newsp->id; 2048 2049 m_freem(m); 2050 key_update_used(); 2051 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2052 } 2053 } 2054 2055 /* 2056 * get new policy id. 2057 * OUT: 2058 * 0: failure. 2059 * others: success. 2060 */ 2061 static u_int32_t 2062 key_getnewspid(void) 2063 { 2064 u_int32_t newid = 0; 2065 int count = key_spi_trycnt; /* XXX */ 2066 struct secpolicy *sp; 2067 2068 /* when requesting to allocate spi ranged */ 2069 while (count--) { 2070 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2071 2072 sp = key_getspbyid(newid); 2073 if (sp == NULL) 2074 break; 2075 2076 KEY_FREESP(&sp); 2077 } 2078 2079 if (count == 0 || newid == 0) { 2080 IPSECLOG(LOG_DEBUG, "to allocate policy id is failed.\n"); 2081 return 0; 2082 } 2083 2084 return newid; 2085 } 2086 2087 /* 2088 * SADB_SPDDELETE processing 2089 * receive 2090 * <base, address(SD), policy(*)> 2091 * from the user(?), and set SADB_SASTATE_DEAD, 2092 * and send, 2093 * <base, address(SD), policy(*)> 2094 * to the ikmpd. 2095 * policy(*) including direction of policy. 2096 * 2097 * m will always be freed. 2098 */ 2099 static int 2100 key_spddelete(struct socket *so, struct mbuf *m, 2101 const struct sadb_msghdr *mhp) 2102 { 2103 struct sadb_address *src0, *dst0; 2104 struct sadb_x_policy *xpl0; 2105 struct secpolicyindex spidx; 2106 struct secpolicy *sp; 2107 2108 KASSERT(so != NULL); 2109 KASSERT(m != NULL); 2110 KASSERT(mhp != NULL); 2111 KASSERT(mhp->msg != NULL); 2112 2113 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2114 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2115 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2116 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2117 return key_senderror(so, m, EINVAL); 2118 } 2119 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2120 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2121 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2122 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2123 return key_senderror(so, m, EINVAL); 2124 } 2125 2126 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2127 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2128 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2129 2130 /* make secindex */ 2131 /* XXX boundary check against sa_len */ 2132 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2133 src0 + 1, 2134 dst0 + 1, 2135 src0->sadb_address_prefixlen, 2136 dst0->sadb_address_prefixlen, 2137 src0->sadb_address_proto, 2138 &spidx); 2139 2140 /* checking the direciton. */ 2141 switch (xpl0->sadb_x_policy_dir) { 2142 case IPSEC_DIR_INBOUND: 2143 case IPSEC_DIR_OUTBOUND: 2144 break; 2145 default: 2146 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2147 return key_senderror(so, m, EINVAL); 2148 } 2149 2150 /* Is there SP in SPD ? */ 2151 sp = key_getsp(&spidx); 2152 if (sp == NULL) { 2153 IPSECLOG(LOG_DEBUG, "no SP found.\n"); 2154 return key_senderror(so, m, EINVAL); 2155 } 2156 2157 /* save policy id to buffer to be returned. */ 2158 xpl0->sadb_x_policy_id = sp->id; 2159 2160 key_sp_dead(sp); 2161 key_sp_unlink(sp); /* XXX jrs ordering */ 2162 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2163 2164 /* Invalidate all cached SPD pointers in the PCBs. */ 2165 ipsec_invalpcbcacheall(); 2166 2167 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2168 2169 { 2170 struct mbuf *n; 2171 struct sadb_msg *newmsg; 2172 2173 /* create new sadb_msg to reply. */ 2174 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2175 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2176 if (!n) 2177 return key_senderror(so, m, ENOBUFS); 2178 2179 newmsg = mtod(n, struct sadb_msg *); 2180 newmsg->sadb_msg_errno = 0; 2181 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2182 2183 m_freem(m); 2184 key_update_used(); 2185 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2186 } 2187 } 2188 2189 /* 2190 * SADB_SPDDELETE2 processing 2191 * receive 2192 * <base, policy(*)> 2193 * from the user(?), and set SADB_SASTATE_DEAD, 2194 * and send, 2195 * <base, policy(*)> 2196 * to the ikmpd. 2197 * policy(*) including direction of policy. 2198 * 2199 * m will always be freed. 2200 */ 2201 static int 2202 key_spddelete2(struct socket *so, struct mbuf *m, 2203 const struct sadb_msghdr *mhp) 2204 { 2205 u_int32_t id; 2206 struct secpolicy *sp; 2207 2208 KASSERT(so != NULL); 2209 KASSERT(m != NULL); 2210 KASSERT(mhp != NULL); 2211 KASSERT(mhp->msg != NULL); 2212 2213 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2214 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2215 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2216 key_senderror(so, m, EINVAL); 2217 return 0; 2218 } 2219 2220 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2221 2222 /* Is there SP in SPD ? */ 2223 sp = key_getspbyid(id); 2224 if (sp == NULL) { 2225 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2226 return key_senderror(so, m, EINVAL); 2227 } 2228 2229 key_sp_dead(sp); 2230 key_sp_unlink(sp); /* XXX jrs ordering */ 2231 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2232 sp = NULL; 2233 2234 /* Invalidate all cached SPD pointers in the PCBs. */ 2235 ipsec_invalpcbcacheall(); 2236 2237 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2238 2239 { 2240 struct mbuf *n, *nn; 2241 struct sadb_msg *newmsg; 2242 int off, len; 2243 2244 /* create new sadb_msg to reply. */ 2245 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2246 2247 if (len > MCLBYTES) 2248 return key_senderror(so, m, ENOBUFS); 2249 MGETHDR(n, M_DONTWAIT, MT_DATA); 2250 if (n && len > MHLEN) { 2251 MCLGET(n, M_DONTWAIT); 2252 if ((n->m_flags & M_EXT) == 0) { 2253 m_freem(n); 2254 n = NULL; 2255 } 2256 } 2257 if (!n) 2258 return key_senderror(so, m, ENOBUFS); 2259 2260 n->m_len = len; 2261 n->m_next = NULL; 2262 off = 0; 2263 2264 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2265 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2266 2267 KASSERTMSG(off == len, "length inconsistency"); 2268 2269 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2270 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2271 if (!n->m_next) { 2272 m_freem(n); 2273 return key_senderror(so, m, ENOBUFS); 2274 } 2275 2276 n->m_pkthdr.len = 0; 2277 for (nn = n; nn; nn = nn->m_next) 2278 n->m_pkthdr.len += nn->m_len; 2279 2280 newmsg = mtod(n, struct sadb_msg *); 2281 newmsg->sadb_msg_errno = 0; 2282 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2283 2284 m_freem(m); 2285 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2286 } 2287 } 2288 2289 /* 2290 * SADB_X_GET processing 2291 * receive 2292 * <base, policy(*)> 2293 * from the user(?), 2294 * and send, 2295 * <base, address(SD), policy> 2296 * to the ikmpd. 2297 * policy(*) including direction of policy. 2298 * 2299 * m will always be freed. 2300 */ 2301 static int 2302 key_spdget(struct socket *so, struct mbuf *m, 2303 const struct sadb_msghdr *mhp) 2304 { 2305 u_int32_t id; 2306 struct secpolicy *sp; 2307 struct mbuf *n; 2308 2309 KASSERT(so != NULL); 2310 KASSERT(m != NULL); 2311 KASSERT(mhp != NULL); 2312 KASSERT(mhp->msg != NULL); 2313 2314 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2315 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2316 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2317 return key_senderror(so, m, EINVAL); 2318 } 2319 2320 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2321 2322 /* Is there SP in SPD ? */ 2323 sp = key_getspbyid(id); 2324 if (sp == NULL) { 2325 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2326 return key_senderror(so, m, ENOENT); 2327 } 2328 2329 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2330 mhp->msg->sadb_msg_pid); 2331 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2332 if (n != NULL) { 2333 m_freem(m); 2334 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2335 } else 2336 return key_senderror(so, m, ENOBUFS); 2337 } 2338 2339 #ifdef notyet 2340 /* 2341 * SADB_X_SPDACQUIRE processing. 2342 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2343 * send 2344 * <base, policy(*)> 2345 * to KMD, and expect to receive 2346 * <base> with SADB_X_SPDACQUIRE if error occurred, 2347 * or 2348 * <base, policy> 2349 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2350 * policy(*) is without policy requests. 2351 * 2352 * 0 : succeed 2353 * others: error number 2354 */ 2355 int 2356 key_spdacquire(const struct secpolicy *sp) 2357 { 2358 struct mbuf *result = NULL, *m; 2359 struct secspacq *newspacq; 2360 int error; 2361 2362 KASSERT(sp != NULL); 2363 KASSERTMSG(sp->req == NULL, "called but there is request"); 2364 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2365 "policy mismathed. IPsec is expected"); 2366 2367 /* Get an entry to check whether sent message or not. */ 2368 newspacq = key_getspacq(&sp->spidx); 2369 if (newspacq != NULL) { 2370 if (key_blockacq_count < newspacq->count) { 2371 /* reset counter and do send message. */ 2372 newspacq->count = 0; 2373 } else { 2374 /* increment counter and do nothing. */ 2375 newspacq->count++; 2376 return 0; 2377 } 2378 } else { 2379 /* make new entry for blocking to send SADB_ACQUIRE. */ 2380 newspacq = key_newspacq(&sp->spidx); 2381 if (newspacq == NULL) 2382 return ENOBUFS; 2383 2384 /* add to acqtree */ 2385 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2386 } 2387 2388 /* create new sadb_msg to reply. */ 2389 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2390 if (!m) { 2391 error = ENOBUFS; 2392 goto fail; 2393 } 2394 result = m; 2395 2396 result->m_pkthdr.len = 0; 2397 for (m = result; m; m = m->m_next) 2398 result->m_pkthdr.len += m->m_len; 2399 2400 mtod(result, struct sadb_msg *)->sadb_msg_len = 2401 PFKEY_UNIT64(result->m_pkthdr.len); 2402 2403 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2404 2405 fail: 2406 if (result) 2407 m_freem(result); 2408 return error; 2409 } 2410 #endif /* notyet */ 2411 2412 /* 2413 * SADB_SPDFLUSH processing 2414 * receive 2415 * <base> 2416 * from the user, and free all entries in secpctree. 2417 * and send, 2418 * <base> 2419 * to the user. 2420 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2421 * 2422 * m will always be freed. 2423 */ 2424 static int 2425 key_spdflush(struct socket *so, struct mbuf *m, 2426 const struct sadb_msghdr *mhp) 2427 { 2428 struct sadb_msg *newmsg; 2429 struct secpolicy *sp; 2430 u_int dir; 2431 2432 KASSERT(so != NULL); 2433 KASSERT(m != NULL); 2434 KASSERT(mhp != NULL); 2435 KASSERT(mhp->msg != NULL); 2436 2437 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2438 return key_senderror(so, m, EINVAL); 2439 2440 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2441 struct secpolicy * nextsp; 2442 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 2443 if (sp->state == IPSEC_SPSTATE_DEAD) 2444 continue; 2445 key_sp_dead(sp); 2446 key_sp_unlink(sp); 2447 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2448 continue; 2449 } 2450 } 2451 2452 /* Invalidate all cached SPD pointers in the PCBs. */ 2453 ipsec_invalpcbcacheall(); 2454 2455 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2456 2457 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2458 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 2459 return key_senderror(so, m, ENOBUFS); 2460 } 2461 2462 if (m->m_next) 2463 m_freem(m->m_next); 2464 m->m_next = NULL; 2465 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2466 newmsg = mtod(m, struct sadb_msg *); 2467 newmsg->sadb_msg_errno = 0; 2468 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2469 2470 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2471 } 2472 2473 static struct sockaddr key_src = { 2474 .sa_len = 2, 2475 .sa_family = PF_KEY, 2476 }; 2477 2478 static struct mbuf * 2479 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2480 { 2481 struct secpolicy *sp; 2482 int cnt; 2483 u_int dir; 2484 struct mbuf *m, *n, *prev; 2485 int totlen; 2486 2487 *lenp = 0; 2488 2489 /* search SPD entry and get buffer size. */ 2490 cnt = 0; 2491 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2492 LIST_FOREACH(sp, &sptree[dir], chain) { 2493 cnt++; 2494 } 2495 } 2496 2497 if (cnt == 0) { 2498 *errorp = ENOENT; 2499 return (NULL); 2500 } 2501 2502 m = NULL; 2503 prev = m; 2504 totlen = 0; 2505 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2506 LIST_FOREACH(sp, &sptree[dir], chain) { 2507 --cnt; 2508 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2509 2510 if (!n) { 2511 *errorp = ENOBUFS; 2512 if (m) 2513 m_freem(m); 2514 return (NULL); 2515 } 2516 2517 totlen += n->m_pkthdr.len; 2518 if (!m) { 2519 m = n; 2520 } else { 2521 prev->m_nextpkt = n; 2522 } 2523 prev = n; 2524 } 2525 } 2526 2527 *lenp = totlen; 2528 *errorp = 0; 2529 return (m); 2530 } 2531 2532 /* 2533 * SADB_SPDDUMP processing 2534 * receive 2535 * <base> 2536 * from the user, and dump all SP leaves 2537 * and send, 2538 * <base> ..... 2539 * to the ikmpd. 2540 * 2541 * m will always be freed. 2542 */ 2543 static int 2544 key_spddump(struct socket *so, struct mbuf *m0, 2545 const struct sadb_msghdr *mhp) 2546 { 2547 struct mbuf *n; 2548 int error, len; 2549 int ok, s; 2550 pid_t pid; 2551 2552 KASSERT(so != NULL); 2553 KASSERT(m0 != NULL); 2554 KASSERT(mhp != NULL); 2555 KASSERT(mhp->msg != NULL); 2556 2557 pid = mhp->msg->sadb_msg_pid; 2558 /* 2559 * If the requestor has insufficient socket-buffer space 2560 * for the entire chain, nobody gets any response to the DUMP. 2561 * XXX For now, only the requestor ever gets anything. 2562 * Moreover, if the requestor has any space at all, they receive 2563 * the entire chain, otherwise the request is refused with ENOBUFS. 2564 */ 2565 if (sbspace(&so->so_rcv) <= 0) { 2566 return key_senderror(so, m0, ENOBUFS); 2567 } 2568 2569 s = splsoftnet(); 2570 n = key_setspddump_chain(&error, &len, pid); 2571 splx(s); 2572 2573 if (n == NULL) { 2574 return key_senderror(so, m0, ENOENT); 2575 } 2576 { 2577 uint64_t *ps = PFKEY_STAT_GETREF(); 2578 ps[PFKEY_STAT_IN_TOTAL]++; 2579 ps[PFKEY_STAT_IN_BYTES] += len; 2580 PFKEY_STAT_PUTREF(); 2581 } 2582 2583 /* 2584 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2585 * The requestor receives either the entire chain, or an 2586 * error message with ENOBUFS. 2587 */ 2588 2589 /* 2590 * sbappendchainwith record takes the chain of entries, one 2591 * packet-record per SPD entry, prepends the key_src sockaddr 2592 * to each packet-record, links the sockaddr mbufs into a new 2593 * list of records, then appends the entire resulting 2594 * list to the requesting socket. 2595 */ 2596 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 2597 SB_PRIO_ONESHOT_OVERFLOW); 2598 2599 if (!ok) { 2600 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2601 m_freem(n); 2602 return key_senderror(so, m0, ENOBUFS); 2603 } 2604 2605 m_freem(m0); 2606 return error; 2607 } 2608 2609 /* 2610 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2611 */ 2612 static int 2613 key_nat_map(struct socket *so, struct mbuf *m, 2614 const struct sadb_msghdr *mhp) 2615 { 2616 struct sadb_x_nat_t_type *type; 2617 struct sadb_x_nat_t_port *sport; 2618 struct sadb_x_nat_t_port *dport; 2619 struct sadb_address *iaddr, *raddr; 2620 struct sadb_x_nat_t_frag *frag; 2621 2622 KASSERT(so != NULL); 2623 KASSERT(m != NULL); 2624 KASSERT(mhp != NULL); 2625 KASSERT(mhp->msg != NULL); 2626 2627 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2628 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2629 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2630 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2631 return key_senderror(so, m, EINVAL); 2632 } 2633 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2634 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2635 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2636 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2637 return key_senderror(so, m, EINVAL); 2638 } 2639 2640 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2641 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2642 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2643 return key_senderror(so, m, EINVAL); 2644 } 2645 2646 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2647 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2648 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2649 return key_senderror(so, m, EINVAL); 2650 } 2651 2652 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2653 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2654 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2655 return key_senderror(so, m, EINVAL); 2656 } 2657 2658 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2659 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2660 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2661 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2662 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2663 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2664 2665 /* 2666 * XXX handle that, it should also contain a SA, or anything 2667 * that enable to update the SA information. 2668 */ 2669 2670 return 0; 2671 } 2672 2673 static struct mbuf * 2674 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2675 { 2676 struct mbuf *result = NULL, *m; 2677 2678 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2679 if (!m) 2680 goto fail; 2681 result = m; 2682 2683 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2684 &sp->spidx.src.sa, sp->spidx.prefs, sp->spidx.ul_proto); 2685 if (!m) 2686 goto fail; 2687 m_cat(result, m); 2688 2689 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2690 &sp->spidx.dst.sa, sp->spidx.prefd, sp->spidx.ul_proto); 2691 if (!m) 2692 goto fail; 2693 m_cat(result, m); 2694 2695 m = key_sp2msg(sp); 2696 if (!m) 2697 goto fail; 2698 m_cat(result, m); 2699 2700 if ((result->m_flags & M_PKTHDR) == 0) 2701 goto fail; 2702 2703 if (result->m_len < sizeof(struct sadb_msg)) { 2704 result = m_pullup(result, sizeof(struct sadb_msg)); 2705 if (result == NULL) 2706 goto fail; 2707 } 2708 2709 result->m_pkthdr.len = 0; 2710 for (m = result; m; m = m->m_next) 2711 result->m_pkthdr.len += m->m_len; 2712 2713 mtod(result, struct sadb_msg *)->sadb_msg_len = 2714 PFKEY_UNIT64(result->m_pkthdr.len); 2715 2716 return result; 2717 2718 fail: 2719 m_freem(result); 2720 return NULL; 2721 } 2722 2723 /* 2724 * get PFKEY message length for security policy and request. 2725 */ 2726 static u_int 2727 key_getspreqmsglen(const struct secpolicy *sp) 2728 { 2729 u_int tlen; 2730 2731 tlen = sizeof(struct sadb_x_policy); 2732 2733 /* if is the policy for ipsec ? */ 2734 if (sp->policy != IPSEC_POLICY_IPSEC) 2735 return tlen; 2736 2737 /* get length of ipsec requests */ 2738 { 2739 const struct ipsecrequest *isr; 2740 int len; 2741 2742 for (isr = sp->req; isr != NULL; isr = isr->next) { 2743 len = sizeof(struct sadb_x_ipsecrequest) 2744 + isr->saidx.src.sa.sa_len + isr->saidx.dst.sa.sa_len; 2745 2746 tlen += PFKEY_ALIGN8(len); 2747 } 2748 } 2749 2750 return tlen; 2751 } 2752 2753 /* 2754 * SADB_SPDEXPIRE processing 2755 * send 2756 * <base, address(SD), lifetime(CH), policy> 2757 * to KMD by PF_KEY. 2758 * 2759 * OUT: 0 : succeed 2760 * others : error number 2761 */ 2762 static int 2763 key_spdexpire(struct secpolicy *sp) 2764 { 2765 int s; 2766 struct mbuf *result = NULL, *m; 2767 int len; 2768 int error = -1; 2769 struct sadb_lifetime *lt; 2770 2771 /* XXX: Why do we lock ? */ 2772 s = splsoftnet(); /*called from softclock()*/ 2773 2774 KASSERT(sp != NULL); 2775 2776 /* set msg header */ 2777 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2778 if (!m) { 2779 error = ENOBUFS; 2780 goto fail; 2781 } 2782 result = m; 2783 2784 /* create lifetime extension (current and hard) */ 2785 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2786 m = key_alloc_mbuf(len); 2787 if (!m || m->m_next) { /*XXX*/ 2788 if (m) 2789 m_freem(m); 2790 error = ENOBUFS; 2791 goto fail; 2792 } 2793 memset(mtod(m, void *), 0, len); 2794 lt = mtod(m, struct sadb_lifetime *); 2795 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2796 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2797 lt->sadb_lifetime_allocations = 0; 2798 lt->sadb_lifetime_bytes = 0; 2799 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2800 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2801 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2802 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2803 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2804 lt->sadb_lifetime_allocations = 0; 2805 lt->sadb_lifetime_bytes = 0; 2806 lt->sadb_lifetime_addtime = sp->lifetime; 2807 lt->sadb_lifetime_usetime = sp->validtime; 2808 m_cat(result, m); 2809 2810 /* set sadb_address for source */ 2811 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sp->spidx.src.sa, 2812 sp->spidx.prefs, sp->spidx.ul_proto); 2813 if (!m) { 2814 error = ENOBUFS; 2815 goto fail; 2816 } 2817 m_cat(result, m); 2818 2819 /* set sadb_address for destination */ 2820 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sp->spidx.dst.sa, 2821 sp->spidx.prefd, sp->spidx.ul_proto); 2822 if (!m) { 2823 error = ENOBUFS; 2824 goto fail; 2825 } 2826 m_cat(result, m); 2827 2828 /* set secpolicy */ 2829 m = key_sp2msg(sp); 2830 if (!m) { 2831 error = ENOBUFS; 2832 goto fail; 2833 } 2834 m_cat(result, m); 2835 2836 if ((result->m_flags & M_PKTHDR) == 0) { 2837 error = EINVAL; 2838 goto fail; 2839 } 2840 2841 if (result->m_len < sizeof(struct sadb_msg)) { 2842 result = m_pullup(result, sizeof(struct sadb_msg)); 2843 if (result == NULL) { 2844 error = ENOBUFS; 2845 goto fail; 2846 } 2847 } 2848 2849 result->m_pkthdr.len = 0; 2850 for (m = result; m; m = m->m_next) 2851 result->m_pkthdr.len += m->m_len; 2852 2853 mtod(result, struct sadb_msg *)->sadb_msg_len = 2854 PFKEY_UNIT64(result->m_pkthdr.len); 2855 2856 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2857 2858 fail: 2859 if (result) 2860 m_freem(result); 2861 splx(s); 2862 return error; 2863 } 2864 2865 /* %%% SAD management */ 2866 /* 2867 * allocating a memory for new SA head, and copy from the values of mhp. 2868 * OUT: NULL : failure due to the lack of memory. 2869 * others : pointer to new SA head. 2870 */ 2871 static struct secashead * 2872 key_newsah(const struct secasindex *saidx) 2873 { 2874 struct secashead *newsah; 2875 int i; 2876 2877 KASSERT(saidx != NULL); 2878 2879 newsah = kmem_zalloc(sizeof(struct secashead), KM_SLEEP); 2880 for (i = 0; i < __arraycount(newsah->savtree); i++) 2881 LIST_INIT(&newsah->savtree[i]); 2882 newsah->saidx = *saidx; 2883 2884 /* add to saidxtree */ 2885 newsah->state = SADB_SASTATE_MATURE; 2886 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2887 2888 return newsah; 2889 } 2890 2891 /* 2892 * delete SA index and all SA registerd. 2893 */ 2894 static void 2895 key_delsah(struct secashead *sah) 2896 { 2897 struct secasvar *sav, *nextsav; 2898 u_int state; 2899 int s; 2900 int zombie = 0; 2901 2902 KASSERT(!cpu_softintr_p()); 2903 KASSERT(sah != NULL); 2904 2905 s = splsoftnet(); 2906 2907 /* searching all SA registerd in the secindex. */ 2908 SASTATE_ANY_FOREACH(state) { 2909 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2910 if (sav->refcnt == 0) { 2911 /* sanity check */ 2912 KEY_CHKSASTATE(state, sav->state); 2913 KEY_FREESAV(&sav); 2914 } else { 2915 /* give up to delete this sa */ 2916 zombie++; 2917 } 2918 } 2919 } 2920 2921 /* don't delete sah only if there are savs. */ 2922 if (zombie) { 2923 splx(s); 2924 return; 2925 } 2926 2927 rtcache_free(&sah->sa_route); 2928 2929 /* remove from tree of SA index */ 2930 KASSERT(__LIST_CHAINED(sah)); 2931 LIST_REMOVE(sah, chain); 2932 2933 if (sah->idents != NULL) 2934 kmem_free(sah->idents, sah->idents_len); 2935 if (sah->identd != NULL) 2936 kmem_free(sah->identd, sah->identd_len); 2937 2938 kmem_free(sah, sizeof(*sah)); 2939 2940 splx(s); 2941 return; 2942 } 2943 2944 /* 2945 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2946 * and copy the values of mhp into new buffer. 2947 * When SAD message type is GETSPI: 2948 * to set sequence number from acq_seq++, 2949 * to set zero to SPI. 2950 * not to call key_setsava(). 2951 * OUT: NULL : fail 2952 * others : pointer to new secasvar. 2953 * 2954 * does not modify mbuf. does not free mbuf on error. 2955 */ 2956 static struct secasvar * 2957 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2958 struct secashead *sah, int *errp, 2959 const char* where, int tag) 2960 { 2961 struct secasvar *newsav; 2962 const struct sadb_sa *xsa; 2963 2964 KASSERT(!cpu_softintr_p()); 2965 KASSERT(m != NULL); 2966 KASSERT(mhp != NULL); 2967 KASSERT(mhp->msg != NULL); 2968 KASSERT(sah != NULL); 2969 2970 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 2971 2972 switch (mhp->msg->sadb_msg_type) { 2973 case SADB_GETSPI: 2974 newsav->spi = 0; 2975 2976 #ifdef IPSEC_DOSEQCHECK 2977 /* sync sequence number */ 2978 if (mhp->msg->sadb_msg_seq == 0) 2979 newsav->seq = 2980 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2981 else 2982 #endif 2983 newsav->seq = mhp->msg->sadb_msg_seq; 2984 break; 2985 2986 case SADB_ADD: 2987 /* sanity check */ 2988 if (mhp->ext[SADB_EXT_SA] == NULL) { 2989 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2990 *errp = EINVAL; 2991 goto error; 2992 } 2993 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2994 newsav->spi = xsa->sadb_sa_spi; 2995 newsav->seq = mhp->msg->sadb_msg_seq; 2996 break; 2997 default: 2998 *errp = EINVAL; 2999 goto error; 3000 } 3001 3002 /* copy sav values */ 3003 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 3004 *errp = key_setsaval(newsav, m, mhp); 3005 if (*errp) 3006 goto error; 3007 } 3008 3009 /* reset created */ 3010 newsav->created = time_uptime; 3011 newsav->pid = mhp->msg->sadb_msg_pid; 3012 3013 /* add to satree */ 3014 newsav->sah = sah; 3015 newsav->refcnt = 1; 3016 newsav->state = SADB_SASTATE_LARVAL; 3017 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 3018 secasvar, chain); 3019 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3020 "DP from %s:%u return SA:%p\n", where, tag, newsav); 3021 return newsav; 3022 3023 error: 3024 KASSERT(*errp != 0); 3025 kmem_free(newsav, sizeof(*newsav)); 3026 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3027 "DP from %s:%u return SA:NULL\n", where, tag); 3028 return NULL; 3029 } 3030 3031 /* 3032 * free() SA variable entry. 3033 */ 3034 static void 3035 key_delsav(struct secasvar *sav) 3036 { 3037 3038 KASSERT(sav != NULL); 3039 KASSERTMSG(sav->refcnt == 0, "reference count %u > 0", sav->refcnt); 3040 3041 /* remove from SA header */ 3042 KASSERT(__LIST_CHAINED(sav)); 3043 LIST_REMOVE(sav, chain); 3044 3045 /* 3046 * Cleanup xform state. Note that zeroize'ing causes the 3047 * keys to be cleared; otherwise we must do it ourself. 3048 */ 3049 if (sav->tdb_xform != NULL) { 3050 sav->tdb_xform->xf_zeroize(sav); 3051 sav->tdb_xform = NULL; 3052 } else { 3053 if (sav->key_auth != NULL) 3054 explicit_memset(_KEYBUF(sav->key_auth), 0, 3055 _KEYLEN(sav->key_auth)); 3056 if (sav->key_enc != NULL) 3057 explicit_memset(_KEYBUF(sav->key_enc), 0, 3058 _KEYLEN(sav->key_enc)); 3059 } 3060 3061 key_freesaval(sav); 3062 kmem_intr_free(sav, sizeof(*sav)); 3063 3064 return; 3065 } 3066 3067 /* 3068 * search SAD. 3069 * OUT: 3070 * NULL : not found 3071 * others : found, pointer to a SA. 3072 */ 3073 static struct secashead * 3074 key_getsah(const struct secasindex *saidx) 3075 { 3076 struct secashead *sah; 3077 3078 LIST_FOREACH(sah, &sahtree, chain) { 3079 if (sah->state == SADB_SASTATE_DEAD) 3080 continue; 3081 if (key_saidx_match(&sah->saidx, saidx, CMP_REQID)) 3082 return sah; 3083 } 3084 3085 return NULL; 3086 } 3087 3088 /* 3089 * check not to be duplicated SPI. 3090 * NOTE: this function is too slow due to searching all SAD. 3091 * OUT: 3092 * NULL : not found 3093 * others : found, pointer to a SA. 3094 */ 3095 static struct secasvar * 3096 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3097 { 3098 struct secashead *sah; 3099 struct secasvar *sav; 3100 3101 /* check address family */ 3102 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3103 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 3104 return NULL; 3105 } 3106 3107 /* check all SAD */ 3108 LIST_FOREACH(sah, &sahtree, chain) { 3109 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3110 continue; 3111 sav = key_getsavbyspi(sah, spi); 3112 if (sav != NULL) 3113 return sav; 3114 } 3115 3116 return NULL; 3117 } 3118 3119 /* 3120 * search SAD litmited alive SA, protocol, SPI. 3121 * OUT: 3122 * NULL : not found 3123 * others : found, pointer to a SA. 3124 */ 3125 static struct secasvar * 3126 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3127 { 3128 struct secasvar *sav; 3129 u_int state; 3130 3131 /* search all status */ 3132 SASTATE_ALIVE_FOREACH(state) { 3133 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3134 3135 /* sanity check */ 3136 if (sav->state != state) { 3137 IPSECLOG(LOG_DEBUG, 3138 "invalid sav->state (queue: %d SA: %d)\n", 3139 state, sav->state); 3140 continue; 3141 } 3142 3143 if (sav->spi == spi) 3144 return sav; 3145 } 3146 } 3147 3148 return NULL; 3149 } 3150 3151 /* 3152 * Free allocated data to member variables of sav: 3153 * sav->replay, sav->key_* and sav->lft_*. 3154 */ 3155 static void 3156 key_freesaval(struct secasvar *sav) 3157 { 3158 3159 if (sav->replay != NULL) { 3160 kmem_intr_free(sav->replay, sav->replay_len); 3161 sav->replay = NULL; 3162 sav->replay_len = 0; 3163 } 3164 if (sav->key_auth != NULL) { 3165 kmem_intr_free(sav->key_auth, sav->key_auth_len); 3166 sav->key_auth = NULL; 3167 sav->key_auth_len = 0; 3168 } 3169 if (sav->key_enc != NULL) { 3170 kmem_intr_free(sav->key_enc, sav->key_enc_len); 3171 sav->key_enc = NULL; 3172 sav->key_enc_len = 0; 3173 } 3174 if (sav->lft_c != NULL) { 3175 kmem_intr_free(sav->lft_c, sizeof(*(sav->lft_c))); 3176 sav->lft_c = NULL; 3177 } 3178 if (sav->lft_h != NULL) { 3179 kmem_intr_free(sav->lft_h, sizeof(*(sav->lft_h))); 3180 sav->lft_h = NULL; 3181 } 3182 if (sav->lft_s != NULL) { 3183 kmem_intr_free(sav->lft_s, sizeof(*(sav->lft_s))); 3184 sav->lft_s = NULL; 3185 } 3186 } 3187 3188 /* 3189 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3190 * You must update these if need. 3191 * OUT: 0: success. 3192 * !0: failure. 3193 * 3194 * does not modify mbuf. does not free mbuf on error. 3195 */ 3196 static int 3197 key_setsaval(struct secasvar *sav, struct mbuf *m, 3198 const struct sadb_msghdr *mhp) 3199 { 3200 int error = 0; 3201 3202 KASSERT(!cpu_softintr_p()); 3203 KASSERT(m != NULL); 3204 KASSERT(mhp != NULL); 3205 KASSERT(mhp->msg != NULL); 3206 3207 /* initialization */ 3208 key_freesaval(sav); 3209 sav->tdb_xform = NULL; /* transform */ 3210 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3211 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3212 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3213 sav->natt_type = 0; 3214 sav->esp_frag = 0; 3215 3216 /* SA */ 3217 if (mhp->ext[SADB_EXT_SA] != NULL) { 3218 const struct sadb_sa *sa0; 3219 3220 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3221 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3222 error = EINVAL; 3223 goto fail; 3224 } 3225 3226 sav->alg_auth = sa0->sadb_sa_auth; 3227 sav->alg_enc = sa0->sadb_sa_encrypt; 3228 sav->flags = sa0->sadb_sa_flags; 3229 3230 /* replay window */ 3231 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3232 size_t len = sizeof(struct secreplay) + 3233 sa0->sadb_sa_replay; 3234 sav->replay = kmem_zalloc(len, KM_SLEEP); 3235 sav->replay_len = len; 3236 if (sa0->sadb_sa_replay != 0) 3237 sav->replay->bitmap = (char*)(sav->replay+1); 3238 sav->replay->wsize = sa0->sadb_sa_replay; 3239 } 3240 } 3241 3242 /* Authentication keys */ 3243 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3244 const struct sadb_key *key0; 3245 int len; 3246 3247 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3248 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3249 3250 error = 0; 3251 if (len < sizeof(*key0)) { 3252 error = EINVAL; 3253 goto fail; 3254 } 3255 switch (mhp->msg->sadb_msg_satype) { 3256 case SADB_SATYPE_AH: 3257 case SADB_SATYPE_ESP: 3258 case SADB_X_SATYPE_TCPSIGNATURE: 3259 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3260 sav->alg_auth != SADB_X_AALG_NULL) 3261 error = EINVAL; 3262 break; 3263 case SADB_X_SATYPE_IPCOMP: 3264 default: 3265 error = EINVAL; 3266 break; 3267 } 3268 if (error) { 3269 IPSECLOG(LOG_DEBUG, "invalid key_auth values.\n"); 3270 goto fail; 3271 } 3272 3273 sav->key_auth = key_newbuf(key0, len); 3274 sav->key_auth_len = len; 3275 } 3276 3277 /* Encryption key */ 3278 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3279 const struct sadb_key *key0; 3280 int len; 3281 3282 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3283 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3284 3285 error = 0; 3286 if (len < sizeof(*key0)) { 3287 error = EINVAL; 3288 goto fail; 3289 } 3290 switch (mhp->msg->sadb_msg_satype) { 3291 case SADB_SATYPE_ESP: 3292 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3293 sav->alg_enc != SADB_EALG_NULL) { 3294 error = EINVAL; 3295 break; 3296 } 3297 sav->key_enc = key_newbuf(key0, len); 3298 sav->key_enc_len = len; 3299 break; 3300 case SADB_X_SATYPE_IPCOMP: 3301 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3302 error = EINVAL; 3303 sav->key_enc = NULL; /*just in case*/ 3304 break; 3305 case SADB_SATYPE_AH: 3306 case SADB_X_SATYPE_TCPSIGNATURE: 3307 default: 3308 error = EINVAL; 3309 break; 3310 } 3311 if (error) { 3312 IPSECLOG(LOG_DEBUG, "invalid key_enc value.\n"); 3313 goto fail; 3314 } 3315 } 3316 3317 /* set iv */ 3318 sav->ivlen = 0; 3319 3320 switch (mhp->msg->sadb_msg_satype) { 3321 case SADB_SATYPE_AH: 3322 error = xform_init(sav, XF_AH); 3323 break; 3324 case SADB_SATYPE_ESP: 3325 error = xform_init(sav, XF_ESP); 3326 break; 3327 case SADB_X_SATYPE_IPCOMP: 3328 error = xform_init(sav, XF_IPCOMP); 3329 break; 3330 case SADB_X_SATYPE_TCPSIGNATURE: 3331 error = xform_init(sav, XF_TCPSIGNATURE); 3332 break; 3333 } 3334 if (error) { 3335 IPSECLOG(LOG_DEBUG, "unable to initialize SA type %u.\n", 3336 mhp->msg->sadb_msg_satype); 3337 goto fail; 3338 } 3339 3340 /* reset created */ 3341 sav->created = time_uptime; 3342 3343 /* make lifetime for CURRENT */ 3344 sav->lft_c = kmem_alloc(sizeof(struct sadb_lifetime), KM_SLEEP); 3345 3346 sav->lft_c->sadb_lifetime_len = 3347 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3348 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3349 sav->lft_c->sadb_lifetime_allocations = 0; 3350 sav->lft_c->sadb_lifetime_bytes = 0; 3351 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3352 sav->lft_c->sadb_lifetime_usetime = 0; 3353 3354 /* lifetimes for HARD and SOFT */ 3355 { 3356 const struct sadb_lifetime *lft0; 3357 3358 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3359 if (lft0 != NULL) { 3360 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3361 error = EINVAL; 3362 goto fail; 3363 } 3364 sav->lft_h = key_newbuf(lft0, sizeof(*lft0)); 3365 } 3366 3367 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3368 if (lft0 != NULL) { 3369 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3370 error = EINVAL; 3371 goto fail; 3372 } 3373 sav->lft_s = key_newbuf(lft0, sizeof(*lft0)); 3374 /* to be initialize ? */ 3375 } 3376 } 3377 3378 return 0; 3379 3380 fail: 3381 /* initialization */ 3382 key_freesaval(sav); 3383 3384 return error; 3385 } 3386 3387 /* 3388 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3389 * OUT: 0: valid 3390 * other: errno 3391 */ 3392 static int 3393 key_mature(struct secasvar *sav) 3394 { 3395 int error; 3396 3397 /* check SPI value */ 3398 switch (sav->sah->saidx.proto) { 3399 case IPPROTO_ESP: 3400 case IPPROTO_AH: 3401 if (ntohl(sav->spi) <= 255) { 3402 IPSECLOG(LOG_DEBUG, "illegal range of SPI %u.\n", 3403 (u_int32_t)ntohl(sav->spi)); 3404 return EINVAL; 3405 } 3406 break; 3407 } 3408 3409 /* check satype */ 3410 switch (sav->sah->saidx.proto) { 3411 case IPPROTO_ESP: 3412 /* check flags */ 3413 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3414 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3415 IPSECLOG(LOG_DEBUG, 3416 "invalid flag (derived) given to old-esp.\n"); 3417 return EINVAL; 3418 } 3419 error = xform_init(sav, XF_ESP); 3420 break; 3421 case IPPROTO_AH: 3422 /* check flags */ 3423 if (sav->flags & SADB_X_EXT_DERIV) { 3424 IPSECLOG(LOG_DEBUG, 3425 "invalid flag (derived) given to AH SA.\n"); 3426 return EINVAL; 3427 } 3428 if (sav->alg_enc != SADB_EALG_NONE) { 3429 IPSECLOG(LOG_DEBUG, 3430 "protocol and algorithm mismated.\n"); 3431 return(EINVAL); 3432 } 3433 error = xform_init(sav, XF_AH); 3434 break; 3435 case IPPROTO_IPCOMP: 3436 if (sav->alg_auth != SADB_AALG_NONE) { 3437 IPSECLOG(LOG_DEBUG, 3438 "protocol and algorithm mismated.\n"); 3439 return(EINVAL); 3440 } 3441 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3442 && ntohl(sav->spi) >= 0x10000) { 3443 IPSECLOG(LOG_DEBUG, "invalid cpi for IPComp.\n"); 3444 return(EINVAL); 3445 } 3446 error = xform_init(sav, XF_IPCOMP); 3447 break; 3448 case IPPROTO_TCP: 3449 if (sav->alg_enc != SADB_EALG_NONE) { 3450 IPSECLOG(LOG_DEBUG, 3451 "protocol and algorithm mismated.\n"); 3452 return(EINVAL); 3453 } 3454 error = xform_init(sav, XF_TCPSIGNATURE); 3455 break; 3456 default: 3457 IPSECLOG(LOG_DEBUG, "Invalid satype.\n"); 3458 error = EPROTONOSUPPORT; 3459 break; 3460 } 3461 if (error == 0) 3462 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3463 return (error); 3464 } 3465 3466 /* 3467 * subroutine for SADB_GET and SADB_DUMP. 3468 */ 3469 static struct mbuf * 3470 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3471 u_int32_t seq, u_int32_t pid) 3472 { 3473 struct mbuf *result = NULL, *tres = NULL, *m; 3474 int l = 0; 3475 int i; 3476 void *p; 3477 struct sadb_lifetime lt; 3478 int dumporder[] = { 3479 SADB_EXT_SA, SADB_X_EXT_SA2, 3480 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3481 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3482 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3483 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3484 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3485 SADB_X_EXT_NAT_T_TYPE, 3486 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3487 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3488 SADB_X_EXT_NAT_T_FRAG, 3489 3490 }; 3491 3492 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3493 if (m == NULL) 3494 goto fail; 3495 result = m; 3496 3497 for (i = __arraycount(dumporder) - 1; i >= 0; i--) { 3498 m = NULL; 3499 p = NULL; 3500 switch (dumporder[i]) { 3501 case SADB_EXT_SA: 3502 m = key_setsadbsa(sav); 3503 break; 3504 3505 case SADB_X_EXT_SA2: 3506 m = key_setsadbxsa2(sav->sah->saidx.mode, 3507 sav->replay ? sav->replay->count : 0, 3508 sav->sah->saidx.reqid); 3509 break; 3510 3511 case SADB_EXT_ADDRESS_SRC: 3512 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3513 &sav->sah->saidx.src.sa, 3514 FULLMASK, IPSEC_ULPROTO_ANY); 3515 break; 3516 3517 case SADB_EXT_ADDRESS_DST: 3518 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3519 &sav->sah->saidx.dst.sa, 3520 FULLMASK, IPSEC_ULPROTO_ANY); 3521 break; 3522 3523 case SADB_EXT_KEY_AUTH: 3524 if (!sav->key_auth) 3525 continue; 3526 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3527 p = sav->key_auth; 3528 break; 3529 3530 case SADB_EXT_KEY_ENCRYPT: 3531 if (!sav->key_enc) 3532 continue; 3533 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3534 p = sav->key_enc; 3535 break; 3536 3537 case SADB_EXT_LIFETIME_CURRENT: 3538 if (!sav->lft_c) 3539 continue; 3540 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3541 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3542 lt.sadb_lifetime_addtime += time_second - time_uptime; 3543 lt.sadb_lifetime_usetime += time_second - time_uptime; 3544 p = < 3545 break; 3546 3547 case SADB_EXT_LIFETIME_HARD: 3548 if (!sav->lft_h) 3549 continue; 3550 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3551 p = sav->lft_h; 3552 break; 3553 3554 case SADB_EXT_LIFETIME_SOFT: 3555 if (!sav->lft_s) 3556 continue; 3557 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3558 p = sav->lft_s; 3559 break; 3560 3561 case SADB_X_EXT_NAT_T_TYPE: 3562 m = key_setsadbxtype(sav->natt_type); 3563 break; 3564 3565 case SADB_X_EXT_NAT_T_DPORT: 3566 if (sav->natt_type == 0) 3567 continue; 3568 m = key_setsadbxport( 3569 key_portfromsaddr(&sav->sah->saidx.dst), 3570 SADB_X_EXT_NAT_T_DPORT); 3571 break; 3572 3573 case SADB_X_EXT_NAT_T_SPORT: 3574 if (sav->natt_type == 0) 3575 continue; 3576 m = key_setsadbxport( 3577 key_portfromsaddr(&sav->sah->saidx.src), 3578 SADB_X_EXT_NAT_T_SPORT); 3579 break; 3580 3581 case SADB_X_EXT_NAT_T_FRAG: 3582 /* don't send frag info if not set */ 3583 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3584 continue; 3585 m = key_setsadbxfrag(sav->esp_frag); 3586 break; 3587 3588 case SADB_X_EXT_NAT_T_OAI: 3589 case SADB_X_EXT_NAT_T_OAR: 3590 continue; 3591 3592 case SADB_EXT_ADDRESS_PROXY: 3593 case SADB_EXT_IDENTITY_SRC: 3594 case SADB_EXT_IDENTITY_DST: 3595 /* XXX: should we brought from SPD ? */ 3596 case SADB_EXT_SENSITIVITY: 3597 default: 3598 continue; 3599 } 3600 3601 KASSERT(!(m && p)); 3602 if (!m && !p) 3603 goto fail; 3604 if (p && tres) { 3605 M_PREPEND(tres, l, M_DONTWAIT); 3606 if (!tres) 3607 goto fail; 3608 memcpy(mtod(tres, void *), p, l); 3609 continue; 3610 } 3611 if (p) { 3612 m = key_alloc_mbuf(l); 3613 if (!m) 3614 goto fail; 3615 m_copyback(m, 0, l, p); 3616 } 3617 3618 if (tres) 3619 m_cat(m, tres); 3620 tres = m; 3621 } 3622 3623 m_cat(result, tres); 3624 tres = NULL; /* avoid free on error below */ 3625 3626 if (result->m_len < sizeof(struct sadb_msg)) { 3627 result = m_pullup(result, sizeof(struct sadb_msg)); 3628 if (result == NULL) 3629 goto fail; 3630 } 3631 3632 result->m_pkthdr.len = 0; 3633 for (m = result; m; m = m->m_next) 3634 result->m_pkthdr.len += m->m_len; 3635 3636 mtod(result, struct sadb_msg *)->sadb_msg_len = 3637 PFKEY_UNIT64(result->m_pkthdr.len); 3638 3639 return result; 3640 3641 fail: 3642 m_freem(result); 3643 m_freem(tres); 3644 return NULL; 3645 } 3646 3647 3648 /* 3649 * set a type in sadb_x_nat_t_type 3650 */ 3651 static struct mbuf * 3652 key_setsadbxtype(u_int16_t type) 3653 { 3654 struct mbuf *m; 3655 size_t len; 3656 struct sadb_x_nat_t_type *p; 3657 3658 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3659 3660 m = key_alloc_mbuf(len); 3661 if (!m || m->m_next) { /*XXX*/ 3662 if (m) 3663 m_freem(m); 3664 return NULL; 3665 } 3666 3667 p = mtod(m, struct sadb_x_nat_t_type *); 3668 3669 memset(p, 0, len); 3670 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3671 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3672 p->sadb_x_nat_t_type_type = type; 3673 3674 return m; 3675 } 3676 /* 3677 * set a port in sadb_x_nat_t_port. port is in network order 3678 */ 3679 static struct mbuf * 3680 key_setsadbxport(u_int16_t port, u_int16_t type) 3681 { 3682 struct mbuf *m; 3683 size_t len; 3684 struct sadb_x_nat_t_port *p; 3685 3686 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3687 3688 m = key_alloc_mbuf(len); 3689 if (!m || m->m_next) { /*XXX*/ 3690 if (m) 3691 m_freem(m); 3692 return NULL; 3693 } 3694 3695 p = mtod(m, struct sadb_x_nat_t_port *); 3696 3697 memset(p, 0, len); 3698 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3699 p->sadb_x_nat_t_port_exttype = type; 3700 p->sadb_x_nat_t_port_port = port; 3701 3702 return m; 3703 } 3704 3705 /* 3706 * set fragmentation info in sadb_x_nat_t_frag 3707 */ 3708 static struct mbuf * 3709 key_setsadbxfrag(u_int16_t flen) 3710 { 3711 struct mbuf *m; 3712 size_t len; 3713 struct sadb_x_nat_t_frag *p; 3714 3715 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3716 3717 m = key_alloc_mbuf(len); 3718 if (!m || m->m_next) { /*XXX*/ 3719 if (m) 3720 m_freem(m); 3721 return NULL; 3722 } 3723 3724 p = mtod(m, struct sadb_x_nat_t_frag *); 3725 3726 memset(p, 0, len); 3727 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3728 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3729 p->sadb_x_nat_t_frag_fraglen = flen; 3730 3731 return m; 3732 } 3733 3734 /* 3735 * Get port from sockaddr, port is in network order 3736 */ 3737 u_int16_t 3738 key_portfromsaddr(const union sockaddr_union *saddr) 3739 { 3740 u_int16_t port; 3741 3742 switch (saddr->sa.sa_family) { 3743 case AF_INET: { 3744 port = saddr->sin.sin_port; 3745 break; 3746 } 3747 #ifdef INET6 3748 case AF_INET6: { 3749 port = saddr->sin6.sin6_port; 3750 break; 3751 } 3752 #endif 3753 default: 3754 printf("%s: unexpected address family\n", __func__); 3755 port = 0; 3756 break; 3757 } 3758 3759 return port; 3760 } 3761 3762 3763 /* 3764 * Set port is struct sockaddr. port is in network order 3765 */ 3766 static void 3767 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3768 { 3769 switch (saddr->sa.sa_family) { 3770 case AF_INET: { 3771 saddr->sin.sin_port = port; 3772 break; 3773 } 3774 #ifdef INET6 3775 case AF_INET6: { 3776 saddr->sin6.sin6_port = port; 3777 break; 3778 } 3779 #endif 3780 default: 3781 printf("%s: unexpected address family %d\n", __func__, 3782 saddr->sa.sa_family); 3783 break; 3784 } 3785 3786 return; 3787 } 3788 3789 /* 3790 * Safety check sa_len 3791 */ 3792 static int 3793 key_checksalen(const union sockaddr_union *saddr) 3794 { 3795 switch (saddr->sa.sa_family) { 3796 case AF_INET: 3797 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3798 return -1; 3799 break; 3800 #ifdef INET6 3801 case AF_INET6: 3802 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3803 return -1; 3804 break; 3805 #endif 3806 default: 3807 printf("%s: unexpected sa_family %d\n", __func__, 3808 saddr->sa.sa_family); 3809 return -1; 3810 break; 3811 } 3812 return 0; 3813 } 3814 3815 3816 /* 3817 * set data into sadb_msg. 3818 */ 3819 static struct mbuf * 3820 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3821 u_int32_t seq, pid_t pid, u_int16_t reserved) 3822 { 3823 struct mbuf *m; 3824 struct sadb_msg *p; 3825 int len; 3826 3827 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3828 if (len > MCLBYTES) 3829 return NULL; 3830 MGETHDR(m, M_DONTWAIT, MT_DATA); 3831 if (m && len > MHLEN) { 3832 MCLGET(m, M_DONTWAIT); 3833 if ((m->m_flags & M_EXT) == 0) { 3834 m_freem(m); 3835 m = NULL; 3836 } 3837 } 3838 if (!m) 3839 return NULL; 3840 m->m_pkthdr.len = m->m_len = len; 3841 m->m_next = NULL; 3842 3843 p = mtod(m, struct sadb_msg *); 3844 3845 memset(p, 0, len); 3846 p->sadb_msg_version = PF_KEY_V2; 3847 p->sadb_msg_type = type; 3848 p->sadb_msg_errno = 0; 3849 p->sadb_msg_satype = satype; 3850 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3851 p->sadb_msg_reserved = reserved; 3852 p->sadb_msg_seq = seq; 3853 p->sadb_msg_pid = (u_int32_t)pid; 3854 3855 return m; 3856 } 3857 3858 /* 3859 * copy secasvar data into sadb_address. 3860 */ 3861 static struct mbuf * 3862 key_setsadbsa(struct secasvar *sav) 3863 { 3864 struct mbuf *m; 3865 struct sadb_sa *p; 3866 int len; 3867 3868 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3869 m = key_alloc_mbuf(len); 3870 if (!m || m->m_next) { /*XXX*/ 3871 if (m) 3872 m_freem(m); 3873 return NULL; 3874 } 3875 3876 p = mtod(m, struct sadb_sa *); 3877 3878 memset(p, 0, len); 3879 p->sadb_sa_len = PFKEY_UNIT64(len); 3880 p->sadb_sa_exttype = SADB_EXT_SA; 3881 p->sadb_sa_spi = sav->spi; 3882 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3883 p->sadb_sa_state = sav->state; 3884 p->sadb_sa_auth = sav->alg_auth; 3885 p->sadb_sa_encrypt = sav->alg_enc; 3886 p->sadb_sa_flags = sav->flags; 3887 3888 return m; 3889 } 3890 3891 /* 3892 * set data into sadb_address. 3893 */ 3894 static struct mbuf * 3895 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3896 u_int8_t prefixlen, u_int16_t ul_proto) 3897 { 3898 struct mbuf *m; 3899 struct sadb_address *p; 3900 size_t len; 3901 3902 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3903 PFKEY_ALIGN8(saddr->sa_len); 3904 m = key_alloc_mbuf(len); 3905 if (!m || m->m_next) { /*XXX*/ 3906 if (m) 3907 m_freem(m); 3908 return NULL; 3909 } 3910 3911 p = mtod(m, struct sadb_address *); 3912 3913 memset(p, 0, len); 3914 p->sadb_address_len = PFKEY_UNIT64(len); 3915 p->sadb_address_exttype = exttype; 3916 p->sadb_address_proto = ul_proto; 3917 if (prefixlen == FULLMASK) { 3918 switch (saddr->sa_family) { 3919 case AF_INET: 3920 prefixlen = sizeof(struct in_addr) << 3; 3921 break; 3922 case AF_INET6: 3923 prefixlen = sizeof(struct in6_addr) << 3; 3924 break; 3925 default: 3926 ; /*XXX*/ 3927 } 3928 } 3929 p->sadb_address_prefixlen = prefixlen; 3930 p->sadb_address_reserved = 0; 3931 3932 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3933 saddr, saddr->sa_len); 3934 3935 return m; 3936 } 3937 3938 #if 0 3939 /* 3940 * set data into sadb_ident. 3941 */ 3942 static struct mbuf * 3943 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3944 void *string, int stringlen, u_int64_t id) 3945 { 3946 struct mbuf *m; 3947 struct sadb_ident *p; 3948 size_t len; 3949 3950 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3951 m = key_alloc_mbuf(len); 3952 if (!m || m->m_next) { /*XXX*/ 3953 if (m) 3954 m_freem(m); 3955 return NULL; 3956 } 3957 3958 p = mtod(m, struct sadb_ident *); 3959 3960 memset(p, 0, len); 3961 p->sadb_ident_len = PFKEY_UNIT64(len); 3962 p->sadb_ident_exttype = exttype; 3963 p->sadb_ident_type = idtype; 3964 p->sadb_ident_reserved = 0; 3965 p->sadb_ident_id = id; 3966 3967 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3968 string, stringlen); 3969 3970 return m; 3971 } 3972 #endif 3973 3974 /* 3975 * set data into sadb_x_sa2. 3976 */ 3977 static struct mbuf * 3978 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 3979 { 3980 struct mbuf *m; 3981 struct sadb_x_sa2 *p; 3982 size_t len; 3983 3984 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3985 m = key_alloc_mbuf(len); 3986 if (!m || m->m_next) { /*XXX*/ 3987 if (m) 3988 m_freem(m); 3989 return NULL; 3990 } 3991 3992 p = mtod(m, struct sadb_x_sa2 *); 3993 3994 memset(p, 0, len); 3995 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3996 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3997 p->sadb_x_sa2_mode = mode; 3998 p->sadb_x_sa2_reserved1 = 0; 3999 p->sadb_x_sa2_reserved2 = 0; 4000 p->sadb_x_sa2_sequence = seq; 4001 p->sadb_x_sa2_reqid = reqid; 4002 4003 return m; 4004 } 4005 4006 /* 4007 * set data into sadb_x_policy 4008 */ 4009 static struct mbuf * 4010 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 4011 { 4012 struct mbuf *m; 4013 struct sadb_x_policy *p; 4014 size_t len; 4015 4016 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4017 m = key_alloc_mbuf(len); 4018 if (!m || m->m_next) { /*XXX*/ 4019 if (m) 4020 m_freem(m); 4021 return NULL; 4022 } 4023 4024 p = mtod(m, struct sadb_x_policy *); 4025 4026 memset(p, 0, len); 4027 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4028 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4029 p->sadb_x_policy_type = type; 4030 p->sadb_x_policy_dir = dir; 4031 p->sadb_x_policy_id = id; 4032 4033 return m; 4034 } 4035 4036 /* %%% utilities */ 4037 /* 4038 * copy a buffer into the new buffer allocated. 4039 */ 4040 static void * 4041 key_newbuf(const void *src, u_int len) 4042 { 4043 void *new; 4044 4045 new = kmem_alloc(len, KM_SLEEP); 4046 memcpy(new, src, len); 4047 4048 return new; 4049 } 4050 4051 /* compare my own address 4052 * OUT: 1: true, i.e. my address. 4053 * 0: false 4054 */ 4055 int 4056 key_ismyaddr(const struct sockaddr *sa) 4057 { 4058 #ifdef INET 4059 const struct sockaddr_in *sin; 4060 const struct in_ifaddr *ia; 4061 int s; 4062 #endif 4063 4064 KASSERT(sa != NULL); 4065 4066 switch (sa->sa_family) { 4067 #ifdef INET 4068 case AF_INET: 4069 sin = (const struct sockaddr_in *)sa; 4070 s = pserialize_read_enter(); 4071 IN_ADDRLIST_READER_FOREACH(ia) { 4072 if (sin->sin_family == ia->ia_addr.sin_family && 4073 sin->sin_len == ia->ia_addr.sin_len && 4074 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4075 { 4076 pserialize_read_exit(s); 4077 return 1; 4078 } 4079 } 4080 pserialize_read_exit(s); 4081 break; 4082 #endif 4083 #ifdef INET6 4084 case AF_INET6: 4085 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4086 #endif 4087 } 4088 4089 return 0; 4090 } 4091 4092 #ifdef INET6 4093 /* 4094 * compare my own address for IPv6. 4095 * 1: ours 4096 * 0: other 4097 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4098 */ 4099 #include <netinet6/in6_var.h> 4100 4101 static int 4102 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4103 { 4104 struct in6_ifaddr *ia; 4105 int s; 4106 struct psref psref; 4107 int bound; 4108 int ours = 1; 4109 4110 bound = curlwp_bind(); 4111 s = pserialize_read_enter(); 4112 IN6_ADDRLIST_READER_FOREACH(ia) { 4113 bool ingroup; 4114 4115 if (key_sockaddr_match((const struct sockaddr *)&sin6, 4116 (const struct sockaddr *)&ia->ia_addr, 0)) { 4117 pserialize_read_exit(s); 4118 goto ours; 4119 } 4120 ia6_acquire(ia, &psref); 4121 pserialize_read_exit(s); 4122 4123 /* 4124 * XXX Multicast 4125 * XXX why do we care about multlicast here while we don't care 4126 * about IPv4 multicast?? 4127 * XXX scope 4128 */ 4129 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4130 if (ingroup) { 4131 ia6_release(ia, &psref); 4132 goto ours; 4133 } 4134 4135 s = pserialize_read_enter(); 4136 ia6_release(ia, &psref); 4137 } 4138 pserialize_read_exit(s); 4139 4140 /* loopback, just for safety */ 4141 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4142 goto ours; 4143 4144 ours = 0; 4145 ours: 4146 curlwp_bindx(bound); 4147 4148 return ours; 4149 } 4150 #endif /*INET6*/ 4151 4152 /* 4153 * compare two secasindex structure. 4154 * flag can specify to compare 2 saidxes. 4155 * compare two secasindex structure without both mode and reqid. 4156 * don't compare port. 4157 * IN: 4158 * saidx0: source, it can be in SAD. 4159 * saidx1: object. 4160 * OUT: 4161 * 1 : equal 4162 * 0 : not equal 4163 */ 4164 static int 4165 key_saidx_match( 4166 const struct secasindex *saidx0, 4167 const struct secasindex *saidx1, 4168 int flag) 4169 { 4170 int chkport; 4171 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4172 4173 /* sanity */ 4174 if (saidx0 == NULL && saidx1 == NULL) 4175 return 1; 4176 4177 if (saidx0 == NULL || saidx1 == NULL) 4178 return 0; 4179 4180 if (saidx0->proto != saidx1->proto) 4181 return 0; 4182 4183 if (flag == CMP_EXACTLY) { 4184 if (saidx0->mode != saidx1->mode) 4185 return 0; 4186 if (saidx0->reqid != saidx1->reqid) 4187 return 0; 4188 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4189 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4190 return 0; 4191 } else { 4192 4193 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4194 if (flag == CMP_MODE_REQID ||flag == CMP_REQID) { 4195 /* 4196 * If reqid of SPD is non-zero, unique SA is required. 4197 * The result must be of same reqid in this case. 4198 */ 4199 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4200 return 0; 4201 } 4202 4203 if (flag == CMP_MODE_REQID) { 4204 if (saidx0->mode != IPSEC_MODE_ANY && 4205 saidx0->mode != saidx1->mode) 4206 return 0; 4207 } 4208 4209 4210 sa0src = &saidx0->src.sa; 4211 sa0dst = &saidx0->dst.sa; 4212 sa1src = &saidx1->src.sa; 4213 sa1dst = &saidx1->dst.sa; 4214 /* 4215 * If NAT-T is enabled, check ports for tunnel mode. 4216 * Don't do it for transport mode, as there is no 4217 * port information available in the SP. 4218 * Also don't check ports if they are set to zero 4219 * in the SPD: This means we have a non-generated 4220 * SPD which can't know UDP ports. 4221 */ 4222 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4223 chkport = PORT_LOOSE; 4224 else 4225 chkport = PORT_NONE; 4226 4227 if (!key_sockaddr_match(sa0src, sa1src, chkport)) { 4228 return 0; 4229 } 4230 if (!key_sockaddr_match(sa0dst, sa1dst, chkport)) { 4231 return 0; 4232 } 4233 } 4234 4235 return 1; 4236 } 4237 4238 /* 4239 * compare two secindex structure exactly. 4240 * IN: 4241 * spidx0: source, it is often in SPD. 4242 * spidx1: object, it is often from PFKEY message. 4243 * OUT: 4244 * 1 : equal 4245 * 0 : not equal 4246 */ 4247 static int 4248 key_spidx_match_exactly( 4249 const struct secpolicyindex *spidx0, 4250 const struct secpolicyindex *spidx1) 4251 { 4252 /* sanity */ 4253 if (spidx0 == NULL && spidx1 == NULL) 4254 return 1; 4255 4256 if (spidx0 == NULL || spidx1 == NULL) 4257 return 0; 4258 4259 if (spidx0->prefs != spidx1->prefs || 4260 spidx0->prefd != spidx1->prefd || 4261 spidx0->ul_proto != spidx1->ul_proto) 4262 return 0; 4263 4264 return key_sockaddr_match(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) && 4265 key_sockaddr_match(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT); 4266 } 4267 4268 /* 4269 * compare two secindex structure with mask. 4270 * IN: 4271 * spidx0: source, it is often in SPD. 4272 * spidx1: object, it is often from IP header. 4273 * OUT: 4274 * 1 : equal 4275 * 0 : not equal 4276 */ 4277 static int 4278 key_spidx_match_withmask( 4279 const struct secpolicyindex *spidx0, 4280 const struct secpolicyindex *spidx1) 4281 { 4282 4283 KASSERT(spidx0 != NULL); 4284 KASSERT(spidx1 != NULL); 4285 4286 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4287 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4288 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4289 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4290 return 0; 4291 4292 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4293 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY && 4294 spidx0->ul_proto != spidx1->ul_proto) 4295 return 0; 4296 4297 switch (spidx0->src.sa.sa_family) { 4298 case AF_INET: 4299 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY && 4300 spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4301 return 0; 4302 if (!key_bb_match_withmask(&spidx0->src.sin.sin_addr, 4303 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4304 return 0; 4305 break; 4306 case AF_INET6: 4307 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY && 4308 spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4309 return 0; 4310 /* 4311 * scope_id check. if sin6_scope_id is 0, we regard it 4312 * as a wildcard scope, which matches any scope zone ID. 4313 */ 4314 if (spidx0->src.sin6.sin6_scope_id && 4315 spidx1->src.sin6.sin6_scope_id && 4316 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4317 return 0; 4318 if (!key_bb_match_withmask(&spidx0->src.sin6.sin6_addr, 4319 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4320 return 0; 4321 break; 4322 default: 4323 /* XXX */ 4324 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4325 return 0; 4326 break; 4327 } 4328 4329 switch (spidx0->dst.sa.sa_family) { 4330 case AF_INET: 4331 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY && 4332 spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4333 return 0; 4334 if (!key_bb_match_withmask(&spidx0->dst.sin.sin_addr, 4335 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4336 return 0; 4337 break; 4338 case AF_INET6: 4339 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY && 4340 spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4341 return 0; 4342 /* 4343 * scope_id check. if sin6_scope_id is 0, we regard it 4344 * as a wildcard scope, which matches any scope zone ID. 4345 */ 4346 if (spidx0->src.sin6.sin6_scope_id && 4347 spidx1->src.sin6.sin6_scope_id && 4348 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4349 return 0; 4350 if (!key_bb_match_withmask(&spidx0->dst.sin6.sin6_addr, 4351 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4352 return 0; 4353 break; 4354 default: 4355 /* XXX */ 4356 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4357 return 0; 4358 break; 4359 } 4360 4361 /* XXX Do we check other field ? e.g. flowinfo */ 4362 4363 return 1; 4364 } 4365 4366 /* returns 0 on match */ 4367 static int 4368 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4369 { 4370 switch (howport) { 4371 case PORT_NONE: 4372 return 0; 4373 case PORT_LOOSE: 4374 if (port1 == 0 || port2 == 0) 4375 return 0; 4376 /*FALLTHROUGH*/ 4377 case PORT_STRICT: 4378 if (port1 != port2) { 4379 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4380 "port fail %d != %d\n", port1, port2); 4381 return 1; 4382 } 4383 return 0; 4384 default: 4385 KASSERT(0); 4386 return 1; 4387 } 4388 } 4389 4390 /* returns 1 on match */ 4391 static int 4392 key_sockaddr_match( 4393 const struct sockaddr *sa1, 4394 const struct sockaddr *sa2, 4395 int howport) 4396 { 4397 const struct sockaddr_in *sin1, *sin2; 4398 const struct sockaddr_in6 *sin61, *sin62; 4399 4400 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4401 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4402 "fam/len fail %d != %d || %d != %d\n", 4403 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4404 sa2->sa_len); 4405 return 0; 4406 } 4407 4408 switch (sa1->sa_family) { 4409 case AF_INET: 4410 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4411 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4412 "len fail %d != %zu\n", 4413 sa1->sa_len, sizeof(struct sockaddr_in)); 4414 return 0; 4415 } 4416 sin1 = (const struct sockaddr_in *)sa1; 4417 sin2 = (const struct sockaddr_in *)sa2; 4418 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4419 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4420 "addr fail %#x != %#x\n", 4421 sin1->sin_addr.s_addr, sin2->sin_addr.s_addr); 4422 return 0; 4423 } 4424 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4425 return 0; 4426 } 4427 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4428 "addr success %#x[%d] == %#x[%d]\n", 4429 sin1->sin_addr.s_addr, sin1->sin_port, 4430 sin2->sin_addr.s_addr, sin2->sin_port); 4431 break; 4432 case AF_INET6: 4433 sin61 = (const struct sockaddr_in6 *)sa1; 4434 sin62 = (const struct sockaddr_in6 *)sa2; 4435 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4436 return 0; /*EINVAL*/ 4437 4438 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4439 return 0; 4440 } 4441 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4442 return 0; 4443 } 4444 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4445 return 0; 4446 } 4447 break; 4448 default: 4449 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4450 return 0; 4451 break; 4452 } 4453 4454 return 1; 4455 } 4456 4457 /* 4458 * compare two buffers with mask. 4459 * IN: 4460 * addr1: source 4461 * addr2: object 4462 * bits: Number of bits to compare 4463 * OUT: 4464 * 1 : equal 4465 * 0 : not equal 4466 */ 4467 static int 4468 key_bb_match_withmask(const void *a1, const void *a2, u_int bits) 4469 { 4470 const unsigned char *p1 = a1; 4471 const unsigned char *p2 = a2; 4472 4473 /* XXX: This could be considerably faster if we compare a word 4474 * at a time, but it is complicated on LSB Endian machines */ 4475 4476 /* Handle null pointers */ 4477 if (p1 == NULL || p2 == NULL) 4478 return (p1 == p2); 4479 4480 while (bits >= 8) { 4481 if (*p1++ != *p2++) 4482 return 0; 4483 bits -= 8; 4484 } 4485 4486 if (bits > 0) { 4487 u_int8_t mask = ~((1<<(8-bits))-1); 4488 if ((*p1 & mask) != (*p2 & mask)) 4489 return 0; 4490 } 4491 return 1; /* Match! */ 4492 } 4493 4494 /* 4495 * time handler. 4496 * scanning SPD and SAD to check status for each entries, 4497 * and do to remove or to expire. 4498 */ 4499 static void 4500 key_timehandler_work(struct work *wk, void *arg) 4501 { 4502 u_int dir; 4503 int s; 4504 time_t now = time_uptime; 4505 4506 s = splsoftnet(); 4507 mutex_enter(softnet_lock); 4508 4509 /* SPD */ 4510 { 4511 struct secpolicy *sp, *nextsp; 4512 4513 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4514 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 4515 if (sp->state == IPSEC_SPSTATE_DEAD) { 4516 key_sp_unlink(sp); /*XXX*/ 4517 4518 /* 'sp' dead; continue transfers to 4519 * 'sp = nextsp' 4520 */ 4521 continue; 4522 } 4523 4524 if (sp->lifetime == 0 && sp->validtime == 0) 4525 continue; 4526 4527 /* the deletion will occur next time */ 4528 if ((sp->lifetime && now - sp->created > sp->lifetime) || 4529 (sp->validtime && now - sp->lastused > sp->validtime)) { 4530 key_sp_dead(sp); 4531 key_spdexpire(sp); 4532 continue; 4533 } 4534 } 4535 } 4536 } 4537 4538 /* SAD */ 4539 { 4540 struct secashead *sah, *nextsah; 4541 struct secasvar *sav, *nextsav; 4542 4543 LIST_FOREACH_SAFE(sah, &sahtree, chain, nextsah) { 4544 /* if sah has been dead, then delete it and process next sah. */ 4545 if (sah->state == SADB_SASTATE_DEAD) { 4546 key_delsah(sah); 4547 continue; 4548 } 4549 4550 /* if LARVAL entry doesn't become MATURE, delete it. */ 4551 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], 4552 chain, nextsav) { 4553 if (now - sav->created > key_larval_lifetime) { 4554 KEY_FREESAV(&sav); 4555 } 4556 } 4557 4558 /* 4559 * check MATURE entry to start to send expire message 4560 * whether or not. 4561 */ 4562 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], 4563 chain, nextsav) { 4564 /* we don't need to check. */ 4565 if (sav->lft_s == NULL) 4566 continue; 4567 4568 /* sanity check */ 4569 if (sav->lft_c == NULL) { 4570 IPSECLOG(LOG_DEBUG, 4571 "There is no CURRENT time, why?\n"); 4572 continue; 4573 } 4574 4575 /* check SOFT lifetime */ 4576 if (sav->lft_s->sadb_lifetime_addtime != 0 && 4577 now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4578 /* 4579 * check SA to be used whether or not. 4580 * when SA hasn't been used, delete it. 4581 */ 4582 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4583 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4584 KEY_FREESAV(&sav); 4585 } else { 4586 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4587 /* 4588 * XXX If we keep to send expire 4589 * message in the status of 4590 * DYING. Do remove below code. 4591 */ 4592 key_expire(sav); 4593 } 4594 } 4595 /* check SOFT lifetime by bytes */ 4596 /* 4597 * XXX I don't know the way to delete this SA 4598 * when new SA is installed. Caution when it's 4599 * installed too big lifetime by time. 4600 */ 4601 else if (sav->lft_s->sadb_lifetime_bytes != 0 && 4602 sav->lft_s->sadb_lifetime_bytes < 4603 sav->lft_c->sadb_lifetime_bytes) { 4604 4605 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4606 /* 4607 * XXX If we keep to send expire 4608 * message in the status of 4609 * DYING. Do remove below code. 4610 */ 4611 key_expire(sav); 4612 } 4613 } 4614 4615 /* check DYING entry to change status to DEAD. */ 4616 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], 4617 chain, nextsav) { 4618 /* we don't need to check. */ 4619 if (sav->lft_h == NULL) 4620 continue; 4621 4622 /* sanity check */ 4623 if (sav->lft_c == NULL) { 4624 IPSECLOG(LOG_DEBUG, 4625 "There is no CURRENT time, why?\n"); 4626 continue; 4627 } 4628 4629 if (sav->lft_h->sadb_lifetime_addtime != 0 && 4630 now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4631 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4632 KEY_FREESAV(&sav); 4633 } 4634 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4635 else if (sav->lft_s != NULL 4636 && sav->lft_s->sadb_lifetime_addtime != 0 4637 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4638 /* 4639 * XXX: should be checked to be 4640 * installed the valid SA. 4641 */ 4642 4643 /* 4644 * If there is no SA then sending 4645 * expire message. 4646 */ 4647 key_expire(sav); 4648 } 4649 #endif 4650 /* check HARD lifetime by bytes */ 4651 else if (sav->lft_h->sadb_lifetime_bytes != 0 && 4652 sav->lft_h->sadb_lifetime_bytes < 4653 sav->lft_c->sadb_lifetime_bytes) { 4654 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4655 KEY_FREESAV(&sav); 4656 } 4657 } 4658 4659 /* delete entry in DEAD */ 4660 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], 4661 chain, nextsav) { 4662 /* sanity check */ 4663 if (sav->state != SADB_SASTATE_DEAD) { 4664 IPSECLOG(LOG_DEBUG, 4665 "invalid sav->state (queue: %d SA: %d): " 4666 "kill it anyway\n", 4667 SADB_SASTATE_DEAD, sav->state); 4668 } 4669 4670 /* 4671 * do not call key_freesav() here. 4672 * sav should already be freed, and sav->refcnt 4673 * shows other references to sav 4674 * (such as from SPD). 4675 */ 4676 } 4677 } 4678 } 4679 4680 #ifndef IPSEC_NONBLOCK_ACQUIRE 4681 /* ACQ tree */ 4682 { 4683 struct secacq *acq, *nextacq; 4684 4685 restart: 4686 mutex_enter(&key_mtx); 4687 LIST_FOREACH_SAFE(acq, &acqtree, chain, nextacq) { 4688 if (now - acq->created > key_blockacq_lifetime) { 4689 LIST_REMOVE(acq, chain); 4690 mutex_exit(&key_mtx); 4691 kmem_free(acq, sizeof(*acq)); 4692 goto restart; 4693 } 4694 } 4695 mutex_exit(&key_mtx); 4696 } 4697 #endif 4698 4699 #ifdef notyet 4700 /* SP ACQ tree */ 4701 { 4702 struct secspacq *acq, *nextacq; 4703 4704 LIST_FOREACH_SAFE(acq, &spacqtree, chain, nextacq) { 4705 if (now - acq->created > key_blockacq_lifetime) { 4706 KASSERT(__LIST_CHAINED(acq)); 4707 LIST_REMOVE(acq, chain); 4708 kmem_free(acq, sizeof(*acq)); 4709 } 4710 } 4711 } 4712 #endif 4713 4714 /* do exchange to tick time !! */ 4715 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4716 4717 mutex_exit(softnet_lock); 4718 splx(s); 4719 return; 4720 } 4721 4722 static void 4723 key_timehandler(void *arg) 4724 { 4725 4726 workqueue_enqueue(key_timehandler_wq, &key_timehandler_wk, NULL); 4727 } 4728 4729 u_long 4730 key_random(void) 4731 { 4732 u_long value; 4733 4734 key_randomfill(&value, sizeof(value)); 4735 return value; 4736 } 4737 4738 void 4739 key_randomfill(void *p, size_t l) 4740 { 4741 4742 cprng_fast(p, l); 4743 } 4744 4745 /* 4746 * map SADB_SATYPE_* to IPPROTO_*. 4747 * if satype == SADB_SATYPE then satype is mapped to ~0. 4748 * OUT: 4749 * 0: invalid satype. 4750 */ 4751 static u_int16_t 4752 key_satype2proto(u_int8_t satype) 4753 { 4754 switch (satype) { 4755 case SADB_SATYPE_UNSPEC: 4756 return IPSEC_PROTO_ANY; 4757 case SADB_SATYPE_AH: 4758 return IPPROTO_AH; 4759 case SADB_SATYPE_ESP: 4760 return IPPROTO_ESP; 4761 case SADB_X_SATYPE_IPCOMP: 4762 return IPPROTO_IPCOMP; 4763 case SADB_X_SATYPE_TCPSIGNATURE: 4764 return IPPROTO_TCP; 4765 default: 4766 return 0; 4767 } 4768 /* NOTREACHED */ 4769 } 4770 4771 /* 4772 * map IPPROTO_* to SADB_SATYPE_* 4773 * OUT: 4774 * 0: invalid protocol type. 4775 */ 4776 static u_int8_t 4777 key_proto2satype(u_int16_t proto) 4778 { 4779 switch (proto) { 4780 case IPPROTO_AH: 4781 return SADB_SATYPE_AH; 4782 case IPPROTO_ESP: 4783 return SADB_SATYPE_ESP; 4784 case IPPROTO_IPCOMP: 4785 return SADB_X_SATYPE_IPCOMP; 4786 case IPPROTO_TCP: 4787 return SADB_X_SATYPE_TCPSIGNATURE; 4788 default: 4789 return 0; 4790 } 4791 /* NOTREACHED */ 4792 } 4793 4794 static int 4795 key_setsecasidx(int proto, int mode, int reqid, 4796 const struct sadb_address * src, 4797 const struct sadb_address * dst, 4798 struct secasindex * saidx) 4799 { 4800 const union sockaddr_union *src_u = (const union sockaddr_union *)src; 4801 const union sockaddr_union *dst_u = (const union sockaddr_union *)dst; 4802 4803 /* sa len safety check */ 4804 if (key_checksalen(src_u) != 0) 4805 return -1; 4806 if (key_checksalen(dst_u) != 0) 4807 return -1; 4808 4809 memset(saidx, 0, sizeof(*saidx)); 4810 saidx->proto = proto; 4811 saidx->mode = mode; 4812 saidx->reqid = reqid; 4813 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4814 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4815 4816 key_porttosaddr(&((saidx)->src), 0); 4817 key_porttosaddr(&((saidx)->dst), 0); 4818 return 0; 4819 } 4820 4821 /* %%% PF_KEY */ 4822 /* 4823 * SADB_GETSPI processing is to receive 4824 * <base, (SA2), src address, dst address, (SPI range)> 4825 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4826 * tree with the status of LARVAL, and send 4827 * <base, SA(*), address(SD)> 4828 * to the IKMPd. 4829 * 4830 * IN: mhp: pointer to the pointer to each header. 4831 * OUT: NULL if fail. 4832 * other if success, return pointer to the message to send. 4833 */ 4834 static int 4835 key_getspi(struct socket *so, struct mbuf *m, 4836 const struct sadb_msghdr *mhp) 4837 { 4838 struct sadb_address *src0, *dst0; 4839 struct secasindex saidx; 4840 struct secashead *newsah; 4841 struct secasvar *newsav; 4842 u_int8_t proto; 4843 u_int32_t spi; 4844 u_int8_t mode; 4845 u_int16_t reqid; 4846 int error; 4847 4848 KASSERT(!cpu_softintr_p()); 4849 KASSERT(so != NULL); 4850 KASSERT(m != NULL); 4851 KASSERT(mhp != NULL); 4852 KASSERT(mhp->msg != NULL); 4853 4854 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4855 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4856 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4857 return key_senderror(so, m, EINVAL); 4858 } 4859 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4860 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4861 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4862 return key_senderror(so, m, EINVAL); 4863 } 4864 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4865 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4866 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4867 } else { 4868 mode = IPSEC_MODE_ANY; 4869 reqid = 0; 4870 } 4871 4872 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4873 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4874 4875 /* map satype to proto */ 4876 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 4877 if (proto == 0) { 4878 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 4879 return key_senderror(so, m, EINVAL); 4880 } 4881 4882 4883 error = key_setsecasidx(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4884 if (error != 0) 4885 return key_senderror(so, m, EINVAL); 4886 4887 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 4888 if (error != 0) 4889 return key_senderror(so, m, EINVAL); 4890 4891 /* SPI allocation */ 4892 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4893 &saidx); 4894 if (spi == 0) 4895 return key_senderror(so, m, EINVAL); 4896 4897 /* get a SA index */ 4898 newsah = key_getsah(&saidx); 4899 if (newsah == NULL) { 4900 /* create a new SA index */ 4901 newsah = key_newsah(&saidx); 4902 if (newsah == NULL) { 4903 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 4904 return key_senderror(so, m, ENOBUFS); 4905 } 4906 } 4907 4908 /* get a new SA */ 4909 /* XXX rewrite */ 4910 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4911 if (newsav == NULL) { 4912 /* XXX don't free new SA index allocated in above. */ 4913 return key_senderror(so, m, error); 4914 } 4915 4916 /* set spi */ 4917 newsav->spi = htonl(spi); 4918 4919 #ifndef IPSEC_NONBLOCK_ACQUIRE 4920 /* delete the entry in acqtree */ 4921 if (mhp->msg->sadb_msg_seq != 0) { 4922 struct secacq *acq; 4923 mutex_enter(&key_mtx); 4924 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 4925 if (acq != NULL) { 4926 /* reset counter in order to deletion by timehandler. */ 4927 acq->created = time_uptime; 4928 acq->count = 0; 4929 } 4930 mutex_exit(&key_mtx); 4931 } 4932 #endif 4933 4934 { 4935 struct mbuf *n, *nn; 4936 struct sadb_sa *m_sa; 4937 struct sadb_msg *newmsg; 4938 int off, len; 4939 4940 /* create new sadb_msg to reply. */ 4941 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4942 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4943 if (len > MCLBYTES) 4944 return key_senderror(so, m, ENOBUFS); 4945 4946 MGETHDR(n, M_DONTWAIT, MT_DATA); 4947 if (len > MHLEN) { 4948 MCLGET(n, M_DONTWAIT); 4949 if ((n->m_flags & M_EXT) == 0) { 4950 m_freem(n); 4951 n = NULL; 4952 } 4953 } 4954 if (!n) 4955 return key_senderror(so, m, ENOBUFS); 4956 4957 n->m_len = len; 4958 n->m_next = NULL; 4959 off = 0; 4960 4961 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4962 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4963 4964 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4965 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4966 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4967 m_sa->sadb_sa_spi = htonl(spi); 4968 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4969 4970 KASSERTMSG(off == len, "length inconsistency"); 4971 4972 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4973 SADB_EXT_ADDRESS_DST); 4974 if (!n->m_next) { 4975 m_freem(n); 4976 return key_senderror(so, m, ENOBUFS); 4977 } 4978 4979 if (n->m_len < sizeof(struct sadb_msg)) { 4980 n = m_pullup(n, sizeof(struct sadb_msg)); 4981 if (n == NULL) 4982 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4983 } 4984 4985 n->m_pkthdr.len = 0; 4986 for (nn = n; nn; nn = nn->m_next) 4987 n->m_pkthdr.len += nn->m_len; 4988 4989 newmsg = mtod(n, struct sadb_msg *); 4990 newmsg->sadb_msg_seq = newsav->seq; 4991 newmsg->sadb_msg_errno = 0; 4992 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4993 4994 m_freem(m); 4995 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4996 } 4997 } 4998 4999 /* 5000 * allocating new SPI 5001 * called by key_getspi(). 5002 * OUT: 5003 * 0: failure. 5004 * others: success. 5005 */ 5006 static u_int32_t 5007 key_do_getnewspi(const struct sadb_spirange *spirange, 5008 const struct secasindex *saidx) 5009 { 5010 u_int32_t newspi; 5011 u_int32_t spmin, spmax; 5012 int count = key_spi_trycnt; 5013 5014 /* set spi range to allocate */ 5015 if (spirange != NULL) { 5016 spmin = spirange->sadb_spirange_min; 5017 spmax = spirange->sadb_spirange_max; 5018 } else { 5019 spmin = key_spi_minval; 5020 spmax = key_spi_maxval; 5021 } 5022 /* IPCOMP needs 2-byte SPI */ 5023 if (saidx->proto == IPPROTO_IPCOMP) { 5024 u_int32_t t; 5025 if (spmin >= 0x10000) 5026 spmin = 0xffff; 5027 if (spmax >= 0x10000) 5028 spmax = 0xffff; 5029 if (spmin > spmax) { 5030 t = spmin; spmin = spmax; spmax = t; 5031 } 5032 } 5033 5034 if (spmin == spmax) { 5035 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5036 IPSECLOG(LOG_DEBUG, "SPI %u exists already.\n", spmin); 5037 return 0; 5038 } 5039 5040 count--; /* taking one cost. */ 5041 newspi = spmin; 5042 5043 } else { 5044 5045 /* init SPI */ 5046 newspi = 0; 5047 5048 /* when requesting to allocate spi ranged */ 5049 while (count--) { 5050 /* generate pseudo-random SPI value ranged. */ 5051 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5052 5053 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5054 break; 5055 } 5056 5057 if (count == 0 || newspi == 0) { 5058 IPSECLOG(LOG_DEBUG, "to allocate spi is failed.\n"); 5059 return 0; 5060 } 5061 } 5062 5063 /* statistics */ 5064 keystat.getspi_count = 5065 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5066 5067 return newspi; 5068 } 5069 5070 static int 5071 key_handle_natt_info(struct secasvar *sav, 5072 const struct sadb_msghdr *mhp) 5073 { 5074 const char *msg = "?" ; 5075 struct sadb_x_nat_t_type *type; 5076 struct sadb_x_nat_t_port *sport, *dport; 5077 struct sadb_address *iaddr, *raddr; 5078 struct sadb_x_nat_t_frag *frag; 5079 5080 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5081 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5082 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5083 return 0; 5084 5085 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5086 msg = "TYPE"; 5087 goto bad; 5088 } 5089 5090 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5091 msg = "SPORT"; 5092 goto bad; 5093 } 5094 5095 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5096 msg = "DPORT"; 5097 goto bad; 5098 } 5099 5100 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5101 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5102 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5103 msg = "OAI"; 5104 goto bad; 5105 } 5106 } 5107 5108 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5109 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5110 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5111 msg = "OAR"; 5112 goto bad; 5113 } 5114 } 5115 5116 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5117 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5118 msg = "FRAG"; 5119 goto bad; 5120 } 5121 } 5122 5123 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5124 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5125 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5126 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5127 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5128 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5129 5130 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5131 type->sadb_x_nat_t_type_type, 5132 ntohs(sport->sadb_x_nat_t_port_port), 5133 ntohs(dport->sadb_x_nat_t_port_port)); 5134 5135 sav->natt_type = type->sadb_x_nat_t_type_type; 5136 key_porttosaddr(&sav->sah->saidx.src, sport->sadb_x_nat_t_port_port); 5137 key_porttosaddr(&sav->sah->saidx.dst, dport->sadb_x_nat_t_port_port); 5138 if (frag) 5139 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5140 else 5141 sav->esp_frag = IP_MAXPACKET; 5142 5143 return 0; 5144 bad: 5145 IPSECLOG(LOG_DEBUG, "invalid message %s\n", msg); 5146 __USE(msg); 5147 return -1; 5148 } 5149 5150 /* Just update the IPSEC_NAT_T ports if present */ 5151 static int 5152 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5153 const struct sadb_msghdr *mhp) 5154 { 5155 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5156 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5157 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5158 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5159 5160 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5161 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5162 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5163 struct sadb_x_nat_t_type *type; 5164 struct sadb_x_nat_t_port *sport; 5165 struct sadb_x_nat_t_port *dport; 5166 5167 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5168 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5169 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5170 IPSECLOG(LOG_DEBUG, "invalid message\n"); 5171 return -1; 5172 } 5173 5174 type = (struct sadb_x_nat_t_type *) 5175 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5176 sport = (struct sadb_x_nat_t_port *) 5177 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5178 dport = (struct sadb_x_nat_t_port *) 5179 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5180 5181 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5182 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5183 5184 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5185 type->sadb_x_nat_t_type_type, 5186 ntohs(sport->sadb_x_nat_t_port_port), 5187 ntohs(dport->sadb_x_nat_t_port_port)); 5188 } 5189 5190 return 0; 5191 } 5192 5193 5194 /* 5195 * SADB_UPDATE processing 5196 * receive 5197 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5198 * key(AE), (identity(SD),) (sensitivity)> 5199 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5200 * and send 5201 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5202 * (identity(SD),) (sensitivity)> 5203 * to the ikmpd. 5204 * 5205 * m will always be freed. 5206 */ 5207 static int 5208 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5209 { 5210 struct sadb_sa *sa0; 5211 struct sadb_address *src0, *dst0; 5212 struct secasindex saidx; 5213 struct secashead *sah; 5214 struct secasvar *sav; 5215 u_int16_t proto; 5216 u_int8_t mode; 5217 u_int16_t reqid; 5218 int error; 5219 5220 KASSERT(!cpu_softintr_p()); 5221 KASSERT(so != NULL); 5222 KASSERT(m != NULL); 5223 KASSERT(mhp != NULL); 5224 KASSERT(mhp->msg != NULL); 5225 5226 /* map satype to proto */ 5227 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5228 if (proto == 0) { 5229 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5230 return key_senderror(so, m, EINVAL); 5231 } 5232 5233 if (mhp->ext[SADB_EXT_SA] == NULL || 5234 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5235 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5236 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5237 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5238 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5239 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5240 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5241 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5242 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5243 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5244 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5245 return key_senderror(so, m, EINVAL); 5246 } 5247 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5248 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5249 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5250 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5251 return key_senderror(so, m, EINVAL); 5252 } 5253 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5254 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5255 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5256 } else { 5257 mode = IPSEC_MODE_ANY; 5258 reqid = 0; 5259 } 5260 /* XXX boundary checking for other extensions */ 5261 5262 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5263 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5264 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5265 5266 error = key_setsecasidx(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5267 if (error != 0) 5268 return key_senderror(so, m, EINVAL); 5269 5270 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5271 if (error != 0) 5272 return key_senderror(so, m, EINVAL); 5273 5274 /* get a SA header */ 5275 sah = key_getsah(&saidx); 5276 if (sah == NULL) { 5277 IPSECLOG(LOG_DEBUG, "no SA index found.\n"); 5278 return key_senderror(so, m, ENOENT); 5279 } 5280 5281 /* set spidx if there */ 5282 /* XXX rewrite */ 5283 error = key_setident(sah, m, mhp); 5284 if (error) 5285 return key_senderror(so, m, error); 5286 5287 /* find a SA with sequence number. */ 5288 #ifdef IPSEC_DOSEQCHECK 5289 if (mhp->msg->sadb_msg_seq != 0) { 5290 sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq); 5291 if (sav == NULL) { 5292 IPSECLOG(LOG_DEBUG, 5293 "no larval SA with sequence %u exists.\n", 5294 mhp->msg->sadb_msg_seq); 5295 return key_senderror(so, m, ENOENT); 5296 } 5297 } 5298 #else 5299 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5300 if (sav == NULL) { 5301 IPSECLOG(LOG_DEBUG, "no such a SA found (spi:%u)\n", 5302 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5303 return key_senderror(so, m, EINVAL); 5304 } 5305 #endif 5306 5307 /* validity check */ 5308 if (sav->sah->saidx.proto != proto) { 5309 IPSECLOG(LOG_DEBUG, "protocol mismatched (DB=%u param=%u)\n", 5310 sav->sah->saidx.proto, proto); 5311 return key_senderror(so, m, EINVAL); 5312 } 5313 #ifdef IPSEC_DOSEQCHECK 5314 if (sav->spi != sa0->sadb_sa_spi) { 5315 IPSECLOG(LOG_DEBUG, "SPI mismatched (DB:%u param:%u)\n", 5316 (u_int32_t)ntohl(sav->spi), 5317 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5318 return key_senderror(so, m, EINVAL); 5319 } 5320 #endif 5321 if (sav->pid != mhp->msg->sadb_msg_pid) { 5322 IPSECLOG(LOG_DEBUG, "pid mismatched (DB:%u param:%u)\n", 5323 sav->pid, mhp->msg->sadb_msg_pid); 5324 return key_senderror(so, m, EINVAL); 5325 } 5326 5327 /* copy sav values */ 5328 error = key_setsaval(sav, m, mhp); 5329 if (error) { 5330 KEY_FREESAV(&sav); 5331 return key_senderror(so, m, error); 5332 } 5333 5334 error = key_handle_natt_info(sav,mhp); 5335 if (error != 0) 5336 return key_senderror(so, m, EINVAL); 5337 5338 /* check SA values to be mature. */ 5339 mhp->msg->sadb_msg_errno = key_mature(sav); 5340 if (mhp->msg->sadb_msg_errno != 0) { 5341 KEY_FREESAV(&sav); 5342 return key_senderror(so, m, 0); 5343 } 5344 5345 { 5346 struct mbuf *n; 5347 5348 /* set msg buf from mhp */ 5349 n = key_getmsgbuf_x1(m, mhp); 5350 if (n == NULL) { 5351 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5352 return key_senderror(so, m, ENOBUFS); 5353 } 5354 5355 m_freem(m); 5356 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5357 } 5358 } 5359 5360 /* 5361 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5362 * only called by key_update(). 5363 * OUT: 5364 * NULL : not found 5365 * others : found, pointer to a SA. 5366 */ 5367 #ifdef IPSEC_DOSEQCHECK 5368 static struct secasvar * 5369 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5370 { 5371 struct secasvar *sav; 5372 u_int state; 5373 5374 state = SADB_SASTATE_LARVAL; 5375 5376 /* search SAD with sequence number ? */ 5377 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5378 5379 KEY_CHKSASTATE(state, sav->state); 5380 5381 if (sav->seq == seq) { 5382 SA_ADDREF(sav); 5383 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5384 "DP cause refcnt++:%d SA:%p\n", 5385 sav->refcnt, sav); 5386 return sav; 5387 } 5388 } 5389 5390 return NULL; 5391 } 5392 #endif 5393 5394 /* 5395 * SADB_ADD processing 5396 * add an entry to SA database, when received 5397 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5398 * key(AE), (identity(SD),) (sensitivity)> 5399 * from the ikmpd, 5400 * and send 5401 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5402 * (identity(SD),) (sensitivity)> 5403 * to the ikmpd. 5404 * 5405 * IGNORE identity and sensitivity messages. 5406 * 5407 * m will always be freed. 5408 */ 5409 static int 5410 key_add(struct socket *so, struct mbuf *m, 5411 const struct sadb_msghdr *mhp) 5412 { 5413 struct sadb_sa *sa0; 5414 struct sadb_address *src0, *dst0; 5415 struct secasindex saidx; 5416 struct secashead *newsah; 5417 struct secasvar *newsav; 5418 u_int16_t proto; 5419 u_int8_t mode; 5420 u_int16_t reqid; 5421 int error; 5422 5423 KASSERT(so != NULL); 5424 KASSERT(m != NULL); 5425 KASSERT(mhp != NULL); 5426 KASSERT(mhp->msg != NULL); 5427 5428 /* map satype to proto */ 5429 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5430 if (proto == 0) { 5431 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5432 return key_senderror(so, m, EINVAL); 5433 } 5434 5435 if (mhp->ext[SADB_EXT_SA] == NULL || 5436 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5437 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5438 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5439 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5440 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5441 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5442 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5443 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5444 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5445 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5446 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5447 return key_senderror(so, m, EINVAL); 5448 } 5449 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5450 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5451 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5452 /* XXX need more */ 5453 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5454 return key_senderror(so, m, EINVAL); 5455 } 5456 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5457 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5458 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5459 } else { 5460 mode = IPSEC_MODE_ANY; 5461 reqid = 0; 5462 } 5463 5464 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5465 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5466 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5467 5468 error = key_setsecasidx(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5469 if (error != 0) 5470 return key_senderror(so, m, EINVAL); 5471 5472 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5473 if (error != 0) 5474 return key_senderror(so, m, EINVAL); 5475 5476 /* get a SA header */ 5477 newsah = key_getsah(&saidx); 5478 if (newsah == NULL) { 5479 /* create a new SA header */ 5480 newsah = key_newsah(&saidx); 5481 if (newsah == NULL) { 5482 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5483 return key_senderror(so, m, ENOBUFS); 5484 } 5485 } 5486 5487 /* set spidx if there */ 5488 /* XXX rewrite */ 5489 error = key_setident(newsah, m, mhp); 5490 if (error) { 5491 return key_senderror(so, m, error); 5492 } 5493 5494 /* create new SA entry. */ 5495 /* We can create new SA only if SPI is differenct. */ 5496 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5497 IPSECLOG(LOG_DEBUG, "SA already exists.\n"); 5498 return key_senderror(so, m, EEXIST); 5499 } 5500 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5501 if (newsav == NULL) { 5502 return key_senderror(so, m, error); 5503 } 5504 5505 error = key_handle_natt_info(newsav, mhp); 5506 if (error != 0) 5507 return key_senderror(so, m, EINVAL); 5508 5509 /* check SA values to be mature. */ 5510 error = key_mature(newsav); 5511 if (error != 0) { 5512 KEY_FREESAV(&newsav); 5513 return key_senderror(so, m, error); 5514 } 5515 5516 /* 5517 * don't call key_freesav() here, as we would like to keep the SA 5518 * in the database on success. 5519 */ 5520 5521 { 5522 struct mbuf *n; 5523 5524 /* set msg buf from mhp */ 5525 n = key_getmsgbuf_x1(m, mhp); 5526 if (n == NULL) { 5527 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5528 return key_senderror(so, m, ENOBUFS); 5529 } 5530 5531 m_freem(m); 5532 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5533 } 5534 } 5535 5536 /* m is retained */ 5537 static int 5538 key_setident(struct secashead *sah, struct mbuf *m, 5539 const struct sadb_msghdr *mhp) 5540 { 5541 const struct sadb_ident *idsrc, *iddst; 5542 int idsrclen, iddstlen; 5543 5544 KASSERT(!cpu_softintr_p()); 5545 KASSERT(sah != NULL); 5546 KASSERT(m != NULL); 5547 KASSERT(mhp != NULL); 5548 KASSERT(mhp->msg != NULL); 5549 5550 /* 5551 * Can be called with an existing sah from key_update(). 5552 */ 5553 if (sah->idents != NULL) { 5554 kmem_free(sah->idents, sah->idents_len); 5555 sah->idents = NULL; 5556 sah->idents_len = 0; 5557 } 5558 if (sah->identd != NULL) { 5559 kmem_free(sah->identd, sah->identd_len); 5560 sah->identd = NULL; 5561 sah->identd_len = 0; 5562 } 5563 5564 /* don't make buffer if not there */ 5565 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5566 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5567 sah->idents = NULL; 5568 sah->identd = NULL; 5569 return 0; 5570 } 5571 5572 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5573 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5574 IPSECLOG(LOG_DEBUG, "invalid identity.\n"); 5575 return EINVAL; 5576 } 5577 5578 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5579 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5580 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5581 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5582 5583 /* validity check */ 5584 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5585 IPSECLOG(LOG_DEBUG, "ident type mismatch.\n"); 5586 return EINVAL; 5587 } 5588 5589 switch (idsrc->sadb_ident_type) { 5590 case SADB_IDENTTYPE_PREFIX: 5591 case SADB_IDENTTYPE_FQDN: 5592 case SADB_IDENTTYPE_USERFQDN: 5593 default: 5594 /* XXX do nothing */ 5595 sah->idents = NULL; 5596 sah->identd = NULL; 5597 return 0; 5598 } 5599 5600 /* make structure */ 5601 sah->idents = kmem_alloc(idsrclen, KM_SLEEP); 5602 sah->idents_len = idsrclen; 5603 sah->identd = kmem_alloc(iddstlen, KM_SLEEP); 5604 sah->identd_len = iddstlen; 5605 memcpy(sah->idents, idsrc, idsrclen); 5606 memcpy(sah->identd, iddst, iddstlen); 5607 5608 return 0; 5609 } 5610 5611 /* 5612 * m will not be freed on return. 5613 * it is caller's responsibility to free the result. 5614 */ 5615 static struct mbuf * 5616 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5617 { 5618 struct mbuf *n; 5619 5620 KASSERT(m != NULL); 5621 KASSERT(mhp != NULL); 5622 KASSERT(mhp->msg != NULL); 5623 5624 /* create new sadb_msg to reply. */ 5625 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5626 SADB_EXT_SA, SADB_X_EXT_SA2, 5627 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5628 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5629 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5630 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5631 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5632 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5633 if (!n) 5634 return NULL; 5635 5636 if (n->m_len < sizeof(struct sadb_msg)) { 5637 n = m_pullup(n, sizeof(struct sadb_msg)); 5638 if (n == NULL) 5639 return NULL; 5640 } 5641 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5642 mtod(n, struct sadb_msg *)->sadb_msg_len = 5643 PFKEY_UNIT64(n->m_pkthdr.len); 5644 5645 return n; 5646 } 5647 5648 static int key_delete_all (struct socket *, struct mbuf *, 5649 const struct sadb_msghdr *, u_int16_t); 5650 5651 /* 5652 * SADB_DELETE processing 5653 * receive 5654 * <base, SA(*), address(SD)> 5655 * from the ikmpd, and set SADB_SASTATE_DEAD, 5656 * and send, 5657 * <base, SA(*), address(SD)> 5658 * to the ikmpd. 5659 * 5660 * m will always be freed. 5661 */ 5662 static int 5663 key_delete(struct socket *so, struct mbuf *m, 5664 const struct sadb_msghdr *mhp) 5665 { 5666 struct sadb_sa *sa0; 5667 struct sadb_address *src0, *dst0; 5668 struct secasindex saidx; 5669 struct secashead *sah; 5670 struct secasvar *sav = NULL; 5671 u_int16_t proto; 5672 int error; 5673 5674 KASSERT(so != NULL); 5675 KASSERT(m != NULL); 5676 KASSERT(mhp != NULL); 5677 KASSERT(mhp->msg != NULL); 5678 5679 /* map satype to proto */ 5680 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5681 if (proto == 0) { 5682 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5683 return key_senderror(so, m, EINVAL); 5684 } 5685 5686 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5687 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5688 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5689 return key_senderror(so, m, EINVAL); 5690 } 5691 5692 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5693 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5694 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5695 return key_senderror(so, m, EINVAL); 5696 } 5697 5698 if (mhp->ext[SADB_EXT_SA] == NULL) { 5699 /* 5700 * Caller wants us to delete all non-LARVAL SAs 5701 * that match the src/dst. This is used during 5702 * IKE INITIAL-CONTACT. 5703 */ 5704 IPSECLOG(LOG_DEBUG, "doing delete all.\n"); 5705 return key_delete_all(so, m, mhp, proto); 5706 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5707 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5708 return key_senderror(so, m, EINVAL); 5709 } 5710 5711 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5712 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5713 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5714 5715 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, 5716 &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 struct sadb_address *src0, *dst0; 5776 struct secasindex saidx; 5777 struct secashead *sah; 5778 struct secasvar *sav, *nextsav; 5779 u_int state; 5780 int error; 5781 5782 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5783 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5784 5785 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, 5786 &saidx); 5787 if (error != 0) 5788 return key_senderror(so, m, EINVAL); 5789 5790 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5791 if (error != 0) 5792 return key_senderror(so, m, EINVAL); 5793 5794 LIST_FOREACH(sah, &sahtree, chain) { 5795 if (sah->state == SADB_SASTATE_DEAD) 5796 continue; 5797 if (!key_saidx_match(&sah->saidx, &saidx, CMP_HEAD)) 5798 continue; 5799 5800 /* Delete all non-LARVAL SAs. */ 5801 SASTATE_ALIVE_FOREACH(state) { 5802 if (state == SADB_SASTATE_LARVAL) 5803 continue; 5804 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 5805 nextsav) { 5806 /* sanity check */ 5807 if (sav->state != state) { 5808 IPSECLOG(LOG_DEBUG, 5809 "invalid sav->state " 5810 "(queue: %d SA: %d)\n", 5811 state, sav->state); 5812 continue; 5813 } 5814 5815 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5816 KEY_FREESAV(&sav); 5817 } 5818 } 5819 } 5820 { 5821 struct mbuf *n; 5822 struct sadb_msg *newmsg; 5823 5824 /* create new sadb_msg to reply. */ 5825 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5826 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5827 if (!n) 5828 return key_senderror(so, m, ENOBUFS); 5829 5830 if (n->m_len < sizeof(struct sadb_msg)) { 5831 n = m_pullup(n, sizeof(struct sadb_msg)); 5832 if (n == NULL) 5833 return key_senderror(so, m, ENOBUFS); 5834 } 5835 newmsg = mtod(n, struct sadb_msg *); 5836 newmsg->sadb_msg_errno = 0; 5837 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5838 5839 m_freem(m); 5840 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5841 } 5842 } 5843 5844 /* 5845 * SADB_GET processing 5846 * receive 5847 * <base, SA(*), address(SD)> 5848 * from the ikmpd, and get a SP and a SA to respond, 5849 * and send, 5850 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5851 * (identity(SD),) (sensitivity)> 5852 * to the ikmpd. 5853 * 5854 * m will always be freed. 5855 */ 5856 static int 5857 key_get(struct socket *so, struct mbuf *m, 5858 const struct sadb_msghdr *mhp) 5859 { 5860 struct sadb_sa *sa0; 5861 struct sadb_address *src0, *dst0; 5862 struct secasindex saidx; 5863 struct secashead *sah; 5864 struct secasvar *sav = NULL; 5865 u_int16_t proto; 5866 int error; 5867 5868 KASSERT(so != NULL); 5869 KASSERT(m != NULL); 5870 KASSERT(mhp != NULL); 5871 KASSERT(mhp->msg != NULL); 5872 5873 /* map satype to proto */ 5874 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5875 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5876 return key_senderror(so, m, EINVAL); 5877 } 5878 5879 if (mhp->ext[SADB_EXT_SA] == NULL || 5880 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5881 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5882 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5883 return key_senderror(so, m, EINVAL); 5884 } 5885 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5886 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5887 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5888 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5889 return key_senderror(so, m, EINVAL); 5890 } 5891 5892 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5893 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5894 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5895 5896 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, 5897 &saidx); 5898 if (error != 0) 5899 return key_senderror(so, m, EINVAL); 5900 5901 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5902 if (error != 0) 5903 return key_senderror(so, m, EINVAL); 5904 5905 /* get a SA header */ 5906 LIST_FOREACH(sah, &sahtree, chain) { 5907 if (sah->state == SADB_SASTATE_DEAD) 5908 continue; 5909 if (!key_saidx_match(&sah->saidx, &saidx, CMP_HEAD)) 5910 continue; 5911 5912 /* get a SA with SPI. */ 5913 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5914 if (sav) 5915 break; 5916 } 5917 if (sah == NULL) { 5918 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5919 return key_senderror(so, m, ENOENT); 5920 } 5921 5922 { 5923 struct mbuf *n; 5924 u_int8_t satype; 5925 5926 /* map proto to satype */ 5927 satype = key_proto2satype(sah->saidx.proto); 5928 if (satype == 0) { 5929 IPSECLOG(LOG_DEBUG, "there was invalid proto in SAD.\n"); 5930 return key_senderror(so, m, EINVAL); 5931 } 5932 5933 /* create new sadb_msg to reply. */ 5934 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5935 mhp->msg->sadb_msg_pid); 5936 if (!n) 5937 return key_senderror(so, m, ENOBUFS); 5938 5939 m_freem(m); 5940 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5941 } 5942 } 5943 5944 /* XXX make it sysctl-configurable? */ 5945 static void 5946 key_getcomb_setlifetime(struct sadb_comb *comb) 5947 { 5948 5949 comb->sadb_comb_soft_allocations = 1; 5950 comb->sadb_comb_hard_allocations = 1; 5951 comb->sadb_comb_soft_bytes = 0; 5952 comb->sadb_comb_hard_bytes = 0; 5953 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5954 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5955 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5956 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5957 } 5958 5959 /* 5960 * XXX reorder combinations by preference 5961 * XXX no idea if the user wants ESP authentication or not 5962 */ 5963 static struct mbuf * 5964 key_getcomb_esp(void) 5965 { 5966 struct sadb_comb *comb; 5967 const struct enc_xform *algo; 5968 struct mbuf *result = NULL, *m, *n; 5969 int encmin; 5970 int i, off, o; 5971 int totlen; 5972 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5973 5974 m = NULL; 5975 for (i = 1; i <= SADB_EALG_MAX; i++) { 5976 algo = esp_algorithm_lookup(i); 5977 if (algo == NULL) 5978 continue; 5979 5980 /* discard algorithms with key size smaller than system min */ 5981 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5982 continue; 5983 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5984 encmin = ipsec_esp_keymin; 5985 else 5986 encmin = _BITS(algo->minkey); 5987 5988 if (ipsec_esp_auth) 5989 m = key_getcomb_ah(); 5990 else { 5991 KASSERTMSG(l <= MLEN, 5992 "l=%u > MLEN=%lu", l, (u_long) MLEN); 5993 MGET(m, M_DONTWAIT, MT_DATA); 5994 if (m) { 5995 M_ALIGN(m, l); 5996 m->m_len = l; 5997 m->m_next = NULL; 5998 memset(mtod(m, void *), 0, m->m_len); 5999 } 6000 } 6001 if (!m) 6002 goto fail; 6003 6004 totlen = 0; 6005 for (n = m; n; n = n->m_next) 6006 totlen += n->m_len; 6007 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 6008 6009 for (off = 0; off < totlen; off += l) { 6010 n = m_pulldown(m, off, l, &o); 6011 if (!n) { 6012 /* m is already freed */ 6013 goto fail; 6014 } 6015 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6016 memset(comb, 0, sizeof(*comb)); 6017 key_getcomb_setlifetime(comb); 6018 comb->sadb_comb_encrypt = i; 6019 comb->sadb_comb_encrypt_minbits = encmin; 6020 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6021 } 6022 6023 if (!result) 6024 result = m; 6025 else 6026 m_cat(result, m); 6027 } 6028 6029 return result; 6030 6031 fail: 6032 if (result) 6033 m_freem(result); 6034 return NULL; 6035 } 6036 6037 static void 6038 key_getsizes_ah(const struct auth_hash *ah, int alg, 6039 u_int16_t* ksmin, u_int16_t* ksmax) 6040 { 6041 *ksmin = *ksmax = ah->keysize; 6042 if (ah->keysize == 0) { 6043 /* 6044 * Transform takes arbitrary key size but algorithm 6045 * key size is restricted. Enforce this here. 6046 */ 6047 switch (alg) { 6048 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6049 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6050 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 6051 default: 6052 IPSECLOG(LOG_DEBUG, "unknown AH algorithm %u\n", alg); 6053 break; 6054 } 6055 } 6056 } 6057 6058 /* 6059 * XXX reorder combinations by preference 6060 */ 6061 static struct mbuf * 6062 key_getcomb_ah(void) 6063 { 6064 struct sadb_comb *comb; 6065 const struct auth_hash *algo; 6066 struct mbuf *m; 6067 u_int16_t minkeysize, maxkeysize; 6068 int i; 6069 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6070 6071 m = NULL; 6072 for (i = 1; i <= SADB_AALG_MAX; i++) { 6073 #if 1 6074 /* we prefer HMAC algorithms, not old algorithms */ 6075 if (i != SADB_AALG_SHA1HMAC && 6076 i != SADB_AALG_MD5HMAC && 6077 i != SADB_X_AALG_SHA2_256 && 6078 i != SADB_X_AALG_SHA2_384 && 6079 i != SADB_X_AALG_SHA2_512) 6080 continue; 6081 #endif 6082 algo = ah_algorithm_lookup(i); 6083 if (!algo) 6084 continue; 6085 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6086 /* discard algorithms with key size smaller than system min */ 6087 if (_BITS(minkeysize) < ipsec_ah_keymin) 6088 continue; 6089 6090 if (!m) { 6091 KASSERTMSG(l <= MLEN, 6092 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6093 MGET(m, M_DONTWAIT, MT_DATA); 6094 if (m) { 6095 M_ALIGN(m, l); 6096 m->m_len = l; 6097 m->m_next = NULL; 6098 } 6099 } else 6100 M_PREPEND(m, l, M_DONTWAIT); 6101 if (!m) 6102 return NULL; 6103 6104 comb = mtod(m, struct sadb_comb *); 6105 memset(comb, 0, sizeof(*comb)); 6106 key_getcomb_setlifetime(comb); 6107 comb->sadb_comb_auth = i; 6108 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6109 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6110 } 6111 6112 return m; 6113 } 6114 6115 /* 6116 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6117 * XXX reorder combinations by preference 6118 */ 6119 static struct mbuf * 6120 key_getcomb_ipcomp(void) 6121 { 6122 struct sadb_comb *comb; 6123 const struct comp_algo *algo; 6124 struct mbuf *m; 6125 int i; 6126 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6127 6128 m = NULL; 6129 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6130 algo = ipcomp_algorithm_lookup(i); 6131 if (!algo) 6132 continue; 6133 6134 if (!m) { 6135 KASSERTMSG(l <= MLEN, 6136 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6137 MGET(m, M_DONTWAIT, MT_DATA); 6138 if (m) { 6139 M_ALIGN(m, l); 6140 m->m_len = l; 6141 m->m_next = NULL; 6142 } 6143 } else 6144 M_PREPEND(m, l, M_DONTWAIT); 6145 if (!m) 6146 return NULL; 6147 6148 comb = mtod(m, struct sadb_comb *); 6149 memset(comb, 0, sizeof(*comb)); 6150 key_getcomb_setlifetime(comb); 6151 comb->sadb_comb_encrypt = i; 6152 /* what should we set into sadb_comb_*_{min,max}bits? */ 6153 } 6154 6155 return m; 6156 } 6157 6158 /* 6159 * XXX no way to pass mode (transport/tunnel) to userland 6160 * XXX replay checking? 6161 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6162 */ 6163 static struct mbuf * 6164 key_getprop(const struct secasindex *saidx) 6165 { 6166 struct sadb_prop *prop; 6167 struct mbuf *m, *n; 6168 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6169 int totlen; 6170 6171 switch (saidx->proto) { 6172 case IPPROTO_ESP: 6173 m = key_getcomb_esp(); 6174 break; 6175 case IPPROTO_AH: 6176 m = key_getcomb_ah(); 6177 break; 6178 case IPPROTO_IPCOMP: 6179 m = key_getcomb_ipcomp(); 6180 break; 6181 default: 6182 return NULL; 6183 } 6184 6185 if (!m) 6186 return NULL; 6187 M_PREPEND(m, l, M_DONTWAIT); 6188 if (!m) 6189 return NULL; 6190 6191 totlen = 0; 6192 for (n = m; n; n = n->m_next) 6193 totlen += n->m_len; 6194 6195 prop = mtod(m, struct sadb_prop *); 6196 memset(prop, 0, sizeof(*prop)); 6197 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6198 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6199 prop->sadb_prop_replay = 32; /* XXX */ 6200 6201 return m; 6202 } 6203 6204 /* 6205 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6206 * send 6207 * <base, SA, address(SD), (address(P)), x_policy, 6208 * (identity(SD),) (sensitivity,) proposal> 6209 * to KMD, and expect to receive 6210 * <base> with SADB_ACQUIRE if error occurred, 6211 * or 6212 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6213 * from KMD by PF_KEY. 6214 * 6215 * XXX x_policy is outside of RFC2367 (KAME extension). 6216 * XXX sensitivity is not supported. 6217 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6218 * see comment for key_getcomb_ipcomp(). 6219 * 6220 * OUT: 6221 * 0 : succeed 6222 * others: error number 6223 */ 6224 static int 6225 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6226 { 6227 struct mbuf *result = NULL, *m; 6228 #ifndef IPSEC_NONBLOCK_ACQUIRE 6229 struct secacq *newacq; 6230 #endif 6231 u_int8_t satype; 6232 int error = -1; 6233 u_int32_t seq; 6234 6235 /* sanity check */ 6236 KASSERT(saidx != NULL); 6237 satype = key_proto2satype(saidx->proto); 6238 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6239 6240 #ifndef IPSEC_NONBLOCK_ACQUIRE 6241 /* 6242 * We never do anything about acquirng SA. There is anather 6243 * solution that kernel blocks to send SADB_ACQUIRE message until 6244 * getting something message from IKEd. In later case, to be 6245 * managed with ACQUIRING list. 6246 */ 6247 /* Get an entry to check whether sending message or not. */ 6248 mutex_enter(&key_mtx); 6249 newacq = key_getacq(saidx); 6250 if (newacq != NULL) { 6251 if (key_blockacq_count < newacq->count) { 6252 /* reset counter and do send message. */ 6253 newacq->count = 0; 6254 } else { 6255 /* increment counter and do nothing. */ 6256 newacq->count++; 6257 mutex_exit(&key_mtx); 6258 return 0; 6259 } 6260 } else { 6261 /* make new entry for blocking to send SADB_ACQUIRE. */ 6262 newacq = key_newacq(saidx); 6263 if (newacq == NULL) 6264 return ENOBUFS; 6265 6266 /* add to acqtree */ 6267 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6268 } 6269 6270 seq = newacq->seq; 6271 mutex_exit(&key_mtx); 6272 #else 6273 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6274 #endif 6275 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6276 if (!m) { 6277 error = ENOBUFS; 6278 goto fail; 6279 } 6280 result = m; 6281 6282 /* set sadb_address for saidx's. */ 6283 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &saidx->src.sa, FULLMASK, 6284 IPSEC_ULPROTO_ANY); 6285 if (!m) { 6286 error = ENOBUFS; 6287 goto fail; 6288 } 6289 m_cat(result, m); 6290 6291 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &saidx->dst.sa, FULLMASK, 6292 IPSEC_ULPROTO_ANY); 6293 if (!m) { 6294 error = ENOBUFS; 6295 goto fail; 6296 } 6297 m_cat(result, m); 6298 6299 /* XXX proxy address (optional) */ 6300 6301 /* set sadb_x_policy */ 6302 if (sp) { 6303 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6304 if (!m) { 6305 error = ENOBUFS; 6306 goto fail; 6307 } 6308 m_cat(result, m); 6309 } 6310 6311 /* XXX identity (optional) */ 6312 #if 0 6313 if (idexttype && fqdn) { 6314 /* create identity extension (FQDN) */ 6315 struct sadb_ident *id; 6316 int fqdnlen; 6317 6318 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6319 id = (struct sadb_ident *)p; 6320 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6321 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6322 id->sadb_ident_exttype = idexttype; 6323 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6324 memcpy(id + 1, fqdn, fqdnlen); 6325 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6326 } 6327 6328 if (idexttype) { 6329 /* create identity extension (USERFQDN) */ 6330 struct sadb_ident *id; 6331 int userfqdnlen; 6332 6333 if (userfqdn) { 6334 /* +1 for terminating-NUL */ 6335 userfqdnlen = strlen(userfqdn) + 1; 6336 } else 6337 userfqdnlen = 0; 6338 id = (struct sadb_ident *)p; 6339 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6340 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6341 id->sadb_ident_exttype = idexttype; 6342 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6343 /* XXX is it correct? */ 6344 if (curlwp) 6345 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6346 if (userfqdn && userfqdnlen) 6347 memcpy(id + 1, userfqdn, userfqdnlen); 6348 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6349 } 6350 #endif 6351 6352 /* XXX sensitivity (optional) */ 6353 6354 /* create proposal/combination extension */ 6355 m = key_getprop(saidx); 6356 #if 0 6357 /* 6358 * spec conformant: always attach proposal/combination extension, 6359 * the problem is that we have no way to attach it for ipcomp, 6360 * due to the way sadb_comb is declared in RFC2367. 6361 */ 6362 if (!m) { 6363 error = ENOBUFS; 6364 goto fail; 6365 } 6366 m_cat(result, m); 6367 #else 6368 /* 6369 * outside of spec; make proposal/combination extension optional. 6370 */ 6371 if (m) 6372 m_cat(result, m); 6373 #endif 6374 6375 if ((result->m_flags & M_PKTHDR) == 0) { 6376 error = EINVAL; 6377 goto fail; 6378 } 6379 6380 if (result->m_len < sizeof(struct sadb_msg)) { 6381 result = m_pullup(result, sizeof(struct sadb_msg)); 6382 if (result == NULL) { 6383 error = ENOBUFS; 6384 goto fail; 6385 } 6386 } 6387 6388 result->m_pkthdr.len = 0; 6389 for (m = result; m; m = m->m_next) 6390 result->m_pkthdr.len += m->m_len; 6391 6392 mtod(result, struct sadb_msg *)->sadb_msg_len = 6393 PFKEY_UNIT64(result->m_pkthdr.len); 6394 6395 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6396 6397 fail: 6398 if (result) 6399 m_freem(result); 6400 return error; 6401 } 6402 6403 #ifndef IPSEC_NONBLOCK_ACQUIRE 6404 static struct secacq * 6405 key_newacq(const struct secasindex *saidx) 6406 { 6407 struct secacq *newacq; 6408 6409 /* get new entry */ 6410 newacq = kmem_intr_zalloc(sizeof(struct secacq), KM_NOSLEEP); 6411 if (newacq == NULL) { 6412 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6413 return NULL; 6414 } 6415 6416 /* copy secindex */ 6417 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6418 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6419 newacq->created = time_uptime; 6420 newacq->count = 0; 6421 6422 return newacq; 6423 } 6424 6425 static struct secacq * 6426 key_getacq(const struct secasindex *saidx) 6427 { 6428 struct secacq *acq; 6429 6430 KASSERT(mutex_owned(&key_mtx)); 6431 6432 LIST_FOREACH(acq, &acqtree, chain) { 6433 if (key_saidx_match(saidx, &acq->saidx, CMP_EXACTLY)) 6434 return acq; 6435 } 6436 6437 return NULL; 6438 } 6439 6440 static struct secacq * 6441 key_getacqbyseq(u_int32_t seq) 6442 { 6443 struct secacq *acq; 6444 6445 KASSERT(mutex_owned(&key_mtx)); 6446 6447 LIST_FOREACH(acq, &acqtree, chain) { 6448 if (acq->seq == seq) 6449 return acq; 6450 } 6451 6452 return NULL; 6453 } 6454 #endif 6455 6456 #ifdef notyet 6457 static struct secspacq * 6458 key_newspacq(const struct secpolicyindex *spidx) 6459 { 6460 struct secspacq *acq; 6461 6462 /* get new entry */ 6463 acq = kmem_intr_zalloc(sizeof(struct secspacq), KM_NOSLEEP); 6464 if (acq == NULL) { 6465 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6466 return NULL; 6467 } 6468 6469 /* copy secindex */ 6470 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6471 acq->created = time_uptime; 6472 acq->count = 0; 6473 6474 return acq; 6475 } 6476 6477 static struct secspacq * 6478 key_getspacq(const struct secpolicyindex *spidx) 6479 { 6480 struct secspacq *acq; 6481 6482 LIST_FOREACH(acq, &spacqtree, chain) { 6483 if (key_spidx_match_exactly(spidx, &acq->spidx)) 6484 return acq; 6485 } 6486 6487 return NULL; 6488 } 6489 #endif /* notyet */ 6490 6491 /* 6492 * SADB_ACQUIRE processing, 6493 * in first situation, is receiving 6494 * <base> 6495 * from the ikmpd, and clear sequence of its secasvar entry. 6496 * 6497 * In second situation, is receiving 6498 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6499 * from a user land process, and return 6500 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6501 * to the socket. 6502 * 6503 * m will always be freed. 6504 */ 6505 static int 6506 key_acquire2(struct socket *so, struct mbuf *m, 6507 const struct sadb_msghdr *mhp) 6508 { 6509 const struct sadb_address *src0, *dst0; 6510 struct secasindex saidx; 6511 struct secashead *sah; 6512 u_int16_t proto; 6513 int error; 6514 6515 KASSERT(so != NULL); 6516 KASSERT(m != NULL); 6517 KASSERT(mhp != NULL); 6518 KASSERT(mhp->msg != NULL); 6519 6520 /* 6521 * Error message from KMd. 6522 * We assume that if error was occurred in IKEd, the length of PFKEY 6523 * message is equal to the size of sadb_msg structure. 6524 * We do not raise error even if error occurred in this function. 6525 */ 6526 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6527 #ifndef IPSEC_NONBLOCK_ACQUIRE 6528 struct secacq *acq; 6529 6530 /* check sequence number */ 6531 if (mhp->msg->sadb_msg_seq == 0) { 6532 IPSECLOG(LOG_DEBUG, "must specify sequence number.\n"); 6533 m_freem(m); 6534 return 0; 6535 } 6536 6537 mutex_enter(&key_mtx); 6538 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 6539 if (acq == NULL) { 6540 mutex_exit(&key_mtx); 6541 /* 6542 * the specified larval SA is already gone, or we got 6543 * a bogus sequence number. we can silently ignore it. 6544 */ 6545 m_freem(m); 6546 return 0; 6547 } 6548 6549 /* reset acq counter in order to deletion by timehander. */ 6550 acq->created = time_uptime; 6551 acq->count = 0; 6552 mutex_exit(&key_mtx); 6553 #endif 6554 m_freem(m); 6555 return 0; 6556 } 6557 6558 /* 6559 * This message is from user land. 6560 */ 6561 6562 /* map satype to proto */ 6563 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6564 if (proto == 0) { 6565 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6566 return key_senderror(so, m, EINVAL); 6567 } 6568 6569 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6570 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6571 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6572 /* error */ 6573 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6574 return key_senderror(so, m, EINVAL); 6575 } 6576 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6577 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6578 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6579 /* error */ 6580 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6581 return key_senderror(so, m, EINVAL); 6582 } 6583 6584 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6585 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6586 6587 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, 6588 &saidx); 6589 if (error != 0) 6590 return key_senderror(so, m, EINVAL); 6591 6592 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6593 if (error != 0) 6594 return key_senderror(so, m, EINVAL); 6595 6596 /* get a SA index */ 6597 LIST_FOREACH(sah, &sahtree, chain) { 6598 if (sah->state == SADB_SASTATE_DEAD) 6599 continue; 6600 if (key_saidx_match(&sah->saidx, &saidx, CMP_MODE_REQID)) 6601 break; 6602 } 6603 if (sah != NULL) { 6604 IPSECLOG(LOG_DEBUG, "a SA exists already.\n"); 6605 return key_senderror(so, m, EEXIST); 6606 } 6607 6608 error = key_acquire(&saidx, NULL); 6609 if (error != 0) { 6610 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 6611 mhp->msg->sadb_msg_errno); 6612 return key_senderror(so, m, error); 6613 } 6614 6615 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6616 } 6617 6618 /* 6619 * SADB_REGISTER processing. 6620 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6621 * receive 6622 * <base> 6623 * from the ikmpd, and register a socket to send PF_KEY messages, 6624 * and send 6625 * <base, supported> 6626 * to KMD by PF_KEY. 6627 * If socket is detached, must free from regnode. 6628 * 6629 * m will always be freed. 6630 */ 6631 static int 6632 key_register(struct socket *so, struct mbuf *m, 6633 const struct sadb_msghdr *mhp) 6634 { 6635 struct secreg *reg, *newreg = 0; 6636 6637 KASSERT(!cpu_softintr_p()); 6638 KASSERT(so != NULL); 6639 KASSERT(m != NULL); 6640 KASSERT(mhp != NULL); 6641 KASSERT(mhp->msg != NULL); 6642 6643 /* check for invalid register message */ 6644 if (mhp->msg->sadb_msg_satype >= __arraycount(regtree)) 6645 return key_senderror(so, m, EINVAL); 6646 6647 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6648 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6649 goto setmsg; 6650 6651 /* Allocate regnode in advance, out of mutex */ 6652 newreg = kmem_zalloc(sizeof(*newreg), KM_SLEEP); 6653 6654 /* check whether existing or not */ 6655 mutex_enter(&key_mtx); 6656 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6657 if (reg->so == so) { 6658 IPSECLOG(LOG_DEBUG, "socket exists already.\n"); 6659 mutex_exit(&key_mtx); 6660 kmem_free(newreg, sizeof(*newreg)); 6661 return key_senderror(so, m, EEXIST); 6662 } 6663 } 6664 6665 newreg->so = so; 6666 ((struct keycb *)sotorawcb(so))->kp_registered++; 6667 6668 /* add regnode to regtree. */ 6669 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6670 mutex_exit(&key_mtx); 6671 6672 setmsg: 6673 { 6674 struct mbuf *n; 6675 struct sadb_msg *newmsg; 6676 struct sadb_supported *sup; 6677 u_int len, alen, elen; 6678 int off; 6679 int i; 6680 struct sadb_alg *alg; 6681 6682 /* create new sadb_msg to reply. */ 6683 alen = 0; 6684 for (i = 1; i <= SADB_AALG_MAX; i++) { 6685 if (ah_algorithm_lookup(i)) 6686 alen += sizeof(struct sadb_alg); 6687 } 6688 if (alen) 6689 alen += sizeof(struct sadb_supported); 6690 elen = 0; 6691 for (i = 1; i <= SADB_EALG_MAX; i++) { 6692 if (esp_algorithm_lookup(i)) 6693 elen += sizeof(struct sadb_alg); 6694 } 6695 if (elen) 6696 elen += sizeof(struct sadb_supported); 6697 6698 len = sizeof(struct sadb_msg) + alen + elen; 6699 6700 if (len > MCLBYTES) 6701 return key_senderror(so, m, ENOBUFS); 6702 6703 MGETHDR(n, M_DONTWAIT, MT_DATA); 6704 if (len > MHLEN) { 6705 MCLGET(n, M_DONTWAIT); 6706 if ((n->m_flags & M_EXT) == 0) { 6707 m_freem(n); 6708 n = NULL; 6709 } 6710 } 6711 if (!n) 6712 return key_senderror(so, m, ENOBUFS); 6713 6714 n->m_pkthdr.len = n->m_len = len; 6715 n->m_next = NULL; 6716 off = 0; 6717 6718 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6719 newmsg = mtod(n, struct sadb_msg *); 6720 newmsg->sadb_msg_errno = 0; 6721 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6722 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6723 6724 /* for authentication algorithm */ 6725 if (alen) { 6726 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6727 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6728 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6729 off += PFKEY_ALIGN8(sizeof(*sup)); 6730 6731 for (i = 1; i <= SADB_AALG_MAX; i++) { 6732 const struct auth_hash *aalgo; 6733 u_int16_t minkeysize, maxkeysize; 6734 6735 aalgo = ah_algorithm_lookup(i); 6736 if (!aalgo) 6737 continue; 6738 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6739 alg->sadb_alg_id = i; 6740 alg->sadb_alg_ivlen = 0; 6741 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6742 alg->sadb_alg_minbits = _BITS(minkeysize); 6743 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6744 off += PFKEY_ALIGN8(sizeof(*alg)); 6745 } 6746 } 6747 6748 /* for encryption algorithm */ 6749 if (elen) { 6750 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6751 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6752 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6753 off += PFKEY_ALIGN8(sizeof(*sup)); 6754 6755 for (i = 1; i <= SADB_EALG_MAX; i++) { 6756 const struct enc_xform *ealgo; 6757 6758 ealgo = esp_algorithm_lookup(i); 6759 if (!ealgo) 6760 continue; 6761 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6762 alg->sadb_alg_id = i; 6763 alg->sadb_alg_ivlen = ealgo->blocksize; 6764 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6765 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6766 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6767 } 6768 } 6769 6770 KASSERTMSG(off == len, "length inconsistency"); 6771 6772 m_freem(m); 6773 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6774 } 6775 } 6776 6777 /* 6778 * free secreg entry registered. 6779 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6780 */ 6781 void 6782 key_freereg(struct socket *so) 6783 { 6784 struct secreg *reg; 6785 int i; 6786 6787 KASSERT(!cpu_softintr_p()); 6788 KASSERT(so != NULL); 6789 6790 /* 6791 * check whether existing or not. 6792 * check all type of SA, because there is a potential that 6793 * one socket is registered to multiple type of SA. 6794 */ 6795 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6796 mutex_enter(&key_mtx); 6797 LIST_FOREACH(reg, ®tree[i], chain) { 6798 if (reg->so == so) { 6799 LIST_REMOVE(reg, chain); 6800 break; 6801 } 6802 } 6803 mutex_exit(&key_mtx); 6804 if (reg != NULL) 6805 kmem_free(reg, sizeof(*reg)); 6806 } 6807 6808 return; 6809 } 6810 6811 /* 6812 * SADB_EXPIRE processing 6813 * send 6814 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6815 * to KMD by PF_KEY. 6816 * NOTE: We send only soft lifetime extension. 6817 * 6818 * OUT: 0 : succeed 6819 * others : error number 6820 */ 6821 static int 6822 key_expire(struct secasvar *sav) 6823 { 6824 int s; 6825 int satype; 6826 struct mbuf *result = NULL, *m; 6827 int len; 6828 int error = -1; 6829 struct sadb_lifetime *lt; 6830 6831 /* XXX: Why do we lock ? */ 6832 s = splsoftnet(); /*called from softclock()*/ 6833 6834 KASSERT(sav != NULL); 6835 KASSERT(sav->sah != NULL); 6836 6837 satype = key_proto2satype(sav->sah->saidx.proto); 6838 KASSERTMSG(satype != 0, "invalid proto is passed"); 6839 6840 /* set msg header */ 6841 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6842 if (!m) { 6843 error = ENOBUFS; 6844 goto fail; 6845 } 6846 result = m; 6847 6848 /* create SA extension */ 6849 m = key_setsadbsa(sav); 6850 if (!m) { 6851 error = ENOBUFS; 6852 goto fail; 6853 } 6854 m_cat(result, m); 6855 6856 /* create SA extension */ 6857 m = key_setsadbxsa2(sav->sah->saidx.mode, 6858 sav->replay ? sav->replay->count : 0, sav->sah->saidx.reqid); 6859 if (!m) { 6860 error = ENOBUFS; 6861 goto fail; 6862 } 6863 m_cat(result, m); 6864 6865 /* create lifetime extension (current and soft) */ 6866 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6867 m = key_alloc_mbuf(len); 6868 if (!m || m->m_next) { /*XXX*/ 6869 if (m) 6870 m_freem(m); 6871 error = ENOBUFS; 6872 goto fail; 6873 } 6874 memset(mtod(m, void *), 0, len); 6875 lt = mtod(m, struct sadb_lifetime *); 6876 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6877 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6878 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6879 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6880 lt->sadb_lifetime_addtime = 6881 time_mono_to_wall(sav->lft_c->sadb_lifetime_addtime); 6882 lt->sadb_lifetime_usetime = 6883 time_mono_to_wall(sav->lft_c->sadb_lifetime_usetime); 6884 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6885 memcpy(lt, sav->lft_s, sizeof(*lt)); 6886 m_cat(result, m); 6887 6888 /* set sadb_address for source */ 6889 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 6890 FULLMASK, IPSEC_ULPROTO_ANY); 6891 if (!m) { 6892 error = ENOBUFS; 6893 goto fail; 6894 } 6895 m_cat(result, m); 6896 6897 /* set sadb_address for destination */ 6898 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.dst.sa, 6899 FULLMASK, IPSEC_ULPROTO_ANY); 6900 if (!m) { 6901 error = ENOBUFS; 6902 goto fail; 6903 } 6904 m_cat(result, m); 6905 6906 if ((result->m_flags & M_PKTHDR) == 0) { 6907 error = EINVAL; 6908 goto fail; 6909 } 6910 6911 if (result->m_len < sizeof(struct sadb_msg)) { 6912 result = m_pullup(result, sizeof(struct sadb_msg)); 6913 if (result == NULL) { 6914 error = ENOBUFS; 6915 goto fail; 6916 } 6917 } 6918 6919 result->m_pkthdr.len = 0; 6920 for (m = result; m; m = m->m_next) 6921 result->m_pkthdr.len += m->m_len; 6922 6923 mtod(result, struct sadb_msg *)->sadb_msg_len = 6924 PFKEY_UNIT64(result->m_pkthdr.len); 6925 6926 splx(s); 6927 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6928 6929 fail: 6930 if (result) 6931 m_freem(result); 6932 splx(s); 6933 return error; 6934 } 6935 6936 /* 6937 * SADB_FLUSH processing 6938 * receive 6939 * <base> 6940 * from the ikmpd, and free all entries in secastree. 6941 * and send, 6942 * <base> 6943 * to the ikmpd. 6944 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6945 * 6946 * m will always be freed. 6947 */ 6948 static int 6949 key_flush(struct socket *so, struct mbuf *m, 6950 const struct sadb_msghdr *mhp) 6951 { 6952 struct sadb_msg *newmsg; 6953 struct secashead *sah; 6954 struct secasvar *sav, *nextsav; 6955 u_int16_t proto; 6956 u_int8_t state; 6957 6958 KASSERT(so != NULL); 6959 KASSERT(mhp != NULL); 6960 KASSERT(mhp->msg != NULL); 6961 6962 /* map satype to proto */ 6963 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6964 if (proto == 0) { 6965 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6966 return key_senderror(so, m, EINVAL); 6967 } 6968 6969 /* no SATYPE specified, i.e. flushing all SA. */ 6970 LIST_FOREACH(sah, &sahtree, chain) { 6971 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && 6972 proto != sah->saidx.proto) 6973 continue; 6974 6975 SASTATE_ALIVE_FOREACH(state) { 6976 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 6977 nextsav) { 6978 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6979 KEY_FREESAV(&sav); 6980 } 6981 } 6982 6983 sah->state = SADB_SASTATE_DEAD; 6984 } 6985 6986 if (m->m_len < sizeof(struct sadb_msg) || 6987 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6988 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6989 return key_senderror(so, m, ENOBUFS); 6990 } 6991 6992 if (m->m_next) 6993 m_freem(m->m_next); 6994 m->m_next = NULL; 6995 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6996 newmsg = mtod(m, struct sadb_msg *); 6997 newmsg->sadb_msg_errno = 0; 6998 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6999 7000 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7001 } 7002 7003 7004 static struct mbuf * 7005 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 7006 { 7007 struct secashead *sah; 7008 struct secasvar *sav; 7009 u_int16_t proto; 7010 u_int8_t satype; 7011 u_int8_t state; 7012 int cnt; 7013 struct mbuf *m, *n, *prev; 7014 7015 *lenp = 0; 7016 7017 /* map satype to proto */ 7018 proto = key_satype2proto(req_satype); 7019 if (proto == 0) { 7020 *errorp = EINVAL; 7021 return (NULL); 7022 } 7023 7024 /* count sav entries to be sent to userland. */ 7025 cnt = 0; 7026 LIST_FOREACH(sah, &sahtree, chain) { 7027 if (req_satype != SADB_SATYPE_UNSPEC && 7028 proto != sah->saidx.proto) 7029 continue; 7030 7031 SASTATE_ANY_FOREACH(state) { 7032 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7033 cnt++; 7034 } 7035 } 7036 } 7037 7038 if (cnt == 0) { 7039 *errorp = ENOENT; 7040 return (NULL); 7041 } 7042 7043 /* send this to the userland, one at a time. */ 7044 m = NULL; 7045 prev = m; 7046 LIST_FOREACH(sah, &sahtree, chain) { 7047 if (req_satype != SADB_SATYPE_UNSPEC && 7048 proto != sah->saidx.proto) 7049 continue; 7050 7051 /* map proto to satype */ 7052 satype = key_proto2satype(sah->saidx.proto); 7053 if (satype == 0) { 7054 m_freem(m); 7055 *errorp = EINVAL; 7056 return (NULL); 7057 } 7058 7059 SASTATE_ANY_FOREACH(state) { 7060 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7061 n = key_setdumpsa(sav, SADB_DUMP, satype, 7062 --cnt, pid); 7063 if (!n) { 7064 m_freem(m); 7065 *errorp = ENOBUFS; 7066 return (NULL); 7067 } 7068 7069 if (!m) 7070 m = n; 7071 else 7072 prev->m_nextpkt = n; 7073 prev = n; 7074 } 7075 } 7076 } 7077 7078 if (!m) { 7079 *errorp = EINVAL; 7080 return (NULL); 7081 } 7082 7083 if ((m->m_flags & M_PKTHDR) != 0) { 7084 m->m_pkthdr.len = 0; 7085 for (n = m; n; n = n->m_next) 7086 m->m_pkthdr.len += n->m_len; 7087 } 7088 7089 *errorp = 0; 7090 return (m); 7091 } 7092 7093 /* 7094 * SADB_DUMP processing 7095 * dump all entries including status of DEAD in SAD. 7096 * receive 7097 * <base> 7098 * from the ikmpd, and dump all secasvar leaves 7099 * and send, 7100 * <base> ..... 7101 * to the ikmpd. 7102 * 7103 * m will always be freed. 7104 */ 7105 static int 7106 key_dump(struct socket *so, struct mbuf *m0, 7107 const struct sadb_msghdr *mhp) 7108 { 7109 u_int16_t proto; 7110 u_int8_t satype; 7111 struct mbuf *n; 7112 int s; 7113 int error, len, ok; 7114 7115 KASSERT(so != NULL); 7116 KASSERT(m0 != NULL); 7117 KASSERT(mhp != NULL); 7118 KASSERT(mhp->msg != NULL); 7119 7120 /* map satype to proto */ 7121 satype = mhp->msg->sadb_msg_satype; 7122 proto = key_satype2proto(satype); 7123 if (proto == 0) { 7124 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7125 return key_senderror(so, m0, EINVAL); 7126 } 7127 7128 /* 7129 * If the requestor has insufficient socket-buffer space 7130 * for the entire chain, nobody gets any response to the DUMP. 7131 * XXX For now, only the requestor ever gets anything. 7132 * Moreover, if the requestor has any space at all, they receive 7133 * the entire chain, otherwise the request is refused with ENOBUFS. 7134 */ 7135 if (sbspace(&so->so_rcv) <= 0) { 7136 return key_senderror(so, m0, ENOBUFS); 7137 } 7138 7139 s = splsoftnet(); 7140 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7141 splx(s); 7142 7143 if (n == NULL) { 7144 return key_senderror(so, m0, ENOENT); 7145 } 7146 { 7147 uint64_t *ps = PFKEY_STAT_GETREF(); 7148 ps[PFKEY_STAT_IN_TOTAL]++; 7149 ps[PFKEY_STAT_IN_BYTES] += len; 7150 PFKEY_STAT_PUTREF(); 7151 } 7152 7153 /* 7154 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7155 * The requestor receives either the entire chain, or an 7156 * error message with ENOBUFS. 7157 * 7158 * sbappendaddrchain() takes the chain of entries, one 7159 * packet-record per SPD entry, prepends the key_src sockaddr 7160 * to each packet-record, links the sockaddr mbufs into a new 7161 * list of records, then appends the entire resulting 7162 * list to the requesting socket. 7163 */ 7164 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 7165 SB_PRIO_ONESHOT_OVERFLOW); 7166 7167 if (!ok) { 7168 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7169 m_freem(n); 7170 return key_senderror(so, m0, ENOBUFS); 7171 } 7172 7173 m_freem(m0); 7174 return 0; 7175 } 7176 7177 /* 7178 * SADB_X_PROMISC processing 7179 * 7180 * m will always be freed. 7181 */ 7182 static int 7183 key_promisc(struct socket *so, struct mbuf *m, 7184 const struct sadb_msghdr *mhp) 7185 { 7186 int olen; 7187 7188 KASSERT(so != NULL); 7189 KASSERT(m != NULL); 7190 KASSERT(mhp != NULL); 7191 KASSERT(mhp->msg != NULL); 7192 7193 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7194 7195 if (olen < sizeof(struct sadb_msg)) { 7196 #if 1 7197 return key_senderror(so, m, EINVAL); 7198 #else 7199 m_freem(m); 7200 return 0; 7201 #endif 7202 } else if (olen == sizeof(struct sadb_msg)) { 7203 /* enable/disable promisc mode */ 7204 struct keycb *kp = (struct keycb *)sotorawcb(so); 7205 if (kp == NULL) 7206 return key_senderror(so, m, EINVAL); 7207 mhp->msg->sadb_msg_errno = 0; 7208 switch (mhp->msg->sadb_msg_satype) { 7209 case 0: 7210 case 1: 7211 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7212 break; 7213 default: 7214 return key_senderror(so, m, EINVAL); 7215 } 7216 7217 /* send the original message back to everyone */ 7218 mhp->msg->sadb_msg_errno = 0; 7219 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7220 } else { 7221 /* send packet as is */ 7222 7223 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7224 7225 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7226 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7227 } 7228 } 7229 7230 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7231 const struct sadb_msghdr *) = { 7232 NULL, /* SADB_RESERVED */ 7233 key_getspi, /* SADB_GETSPI */ 7234 key_update, /* SADB_UPDATE */ 7235 key_add, /* SADB_ADD */ 7236 key_delete, /* SADB_DELETE */ 7237 key_get, /* SADB_GET */ 7238 key_acquire2, /* SADB_ACQUIRE */ 7239 key_register, /* SADB_REGISTER */ 7240 NULL, /* SADB_EXPIRE */ 7241 key_flush, /* SADB_FLUSH */ 7242 key_dump, /* SADB_DUMP */ 7243 key_promisc, /* SADB_X_PROMISC */ 7244 NULL, /* SADB_X_PCHANGE */ 7245 key_spdadd, /* SADB_X_SPDUPDATE */ 7246 key_spdadd, /* SADB_X_SPDADD */ 7247 key_spddelete, /* SADB_X_SPDDELETE */ 7248 key_spdget, /* SADB_X_SPDGET */ 7249 NULL, /* SADB_X_SPDACQUIRE */ 7250 key_spddump, /* SADB_X_SPDDUMP */ 7251 key_spdflush, /* SADB_X_SPDFLUSH */ 7252 key_spdadd, /* SADB_X_SPDSETIDX */ 7253 NULL, /* SADB_X_SPDEXPIRE */ 7254 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7255 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7256 }; 7257 7258 /* 7259 * parse sadb_msg buffer to process PFKEYv2, 7260 * and create a data to response if needed. 7261 * I think to be dealed with mbuf directly. 7262 * IN: 7263 * msgp : pointer to pointer to a received buffer pulluped. 7264 * This is rewrited to response. 7265 * so : pointer to socket. 7266 * OUT: 7267 * length for buffer to send to user process. 7268 */ 7269 int 7270 key_parse(struct mbuf *m, struct socket *so) 7271 { 7272 struct sadb_msg *msg; 7273 struct sadb_msghdr mh; 7274 u_int orglen; 7275 int error; 7276 int target; 7277 7278 KASSERT(m != NULL); 7279 KASSERT(so != NULL); 7280 7281 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7282 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7283 IPSECLOG(LOG_DEBUG, "passed sadb_msg\n"); 7284 kdebug_sadb(msg); 7285 } 7286 #endif 7287 7288 if (m->m_len < sizeof(struct sadb_msg)) { 7289 m = m_pullup(m, sizeof(struct sadb_msg)); 7290 if (!m) 7291 return ENOBUFS; 7292 } 7293 msg = mtod(m, struct sadb_msg *); 7294 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7295 target = KEY_SENDUP_ONE; 7296 7297 if ((m->m_flags & M_PKTHDR) == 0 || 7298 m->m_pkthdr.len != orglen) { 7299 IPSECLOG(LOG_DEBUG, "invalid message length.\n"); 7300 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7301 error = EINVAL; 7302 goto senderror; 7303 } 7304 7305 if (msg->sadb_msg_version != PF_KEY_V2) { 7306 IPSECLOG(LOG_DEBUG, "PF_KEY version %u is mismatched.\n", 7307 msg->sadb_msg_version); 7308 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7309 error = EINVAL; 7310 goto senderror; 7311 } 7312 7313 if (msg->sadb_msg_type > SADB_MAX) { 7314 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7315 msg->sadb_msg_type); 7316 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7317 error = EINVAL; 7318 goto senderror; 7319 } 7320 7321 /* for old-fashioned code - should be nuked */ 7322 if (m->m_pkthdr.len > MCLBYTES) { 7323 m_freem(m); 7324 return ENOBUFS; 7325 } 7326 if (m->m_next) { 7327 struct mbuf *n; 7328 7329 MGETHDR(n, M_DONTWAIT, MT_DATA); 7330 if (n && m->m_pkthdr.len > MHLEN) { 7331 MCLGET(n, M_DONTWAIT); 7332 if ((n->m_flags & M_EXT) == 0) { 7333 m_free(n); 7334 n = NULL; 7335 } 7336 } 7337 if (!n) { 7338 m_freem(m); 7339 return ENOBUFS; 7340 } 7341 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7342 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7343 n->m_next = NULL; 7344 m_freem(m); 7345 m = n; 7346 } 7347 7348 /* align the mbuf chain so that extensions are in contiguous region. */ 7349 error = key_align(m, &mh); 7350 if (error) 7351 return error; 7352 7353 if (m->m_next) { /*XXX*/ 7354 m_freem(m); 7355 return ENOBUFS; 7356 } 7357 7358 msg = mh.msg; 7359 7360 /* check SA type */ 7361 switch (msg->sadb_msg_satype) { 7362 case SADB_SATYPE_UNSPEC: 7363 switch (msg->sadb_msg_type) { 7364 case SADB_GETSPI: 7365 case SADB_UPDATE: 7366 case SADB_ADD: 7367 case SADB_DELETE: 7368 case SADB_GET: 7369 case SADB_ACQUIRE: 7370 case SADB_EXPIRE: 7371 IPSECLOG(LOG_DEBUG, 7372 "must specify satype when msg type=%u.\n", 7373 msg->sadb_msg_type); 7374 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7375 error = EINVAL; 7376 goto senderror; 7377 } 7378 break; 7379 case SADB_SATYPE_AH: 7380 case SADB_SATYPE_ESP: 7381 case SADB_X_SATYPE_IPCOMP: 7382 case SADB_X_SATYPE_TCPSIGNATURE: 7383 switch (msg->sadb_msg_type) { 7384 case SADB_X_SPDADD: 7385 case SADB_X_SPDDELETE: 7386 case SADB_X_SPDGET: 7387 case SADB_X_SPDDUMP: 7388 case SADB_X_SPDFLUSH: 7389 case SADB_X_SPDSETIDX: 7390 case SADB_X_SPDUPDATE: 7391 case SADB_X_SPDDELETE2: 7392 IPSECLOG(LOG_DEBUG, "illegal satype=%u\n", 7393 msg->sadb_msg_type); 7394 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7395 error = EINVAL; 7396 goto senderror; 7397 } 7398 break; 7399 case SADB_SATYPE_RSVP: 7400 case SADB_SATYPE_OSPFV2: 7401 case SADB_SATYPE_RIPV2: 7402 case SADB_SATYPE_MIP: 7403 IPSECLOG(LOG_DEBUG, "type %u isn't supported.\n", 7404 msg->sadb_msg_satype); 7405 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7406 error = EOPNOTSUPP; 7407 goto senderror; 7408 case 1: /* XXX: What does it do? */ 7409 if (msg->sadb_msg_type == SADB_X_PROMISC) 7410 break; 7411 /*FALLTHROUGH*/ 7412 default: 7413 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7414 msg->sadb_msg_satype); 7415 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7416 error = EINVAL; 7417 goto senderror; 7418 } 7419 7420 /* check field of upper layer protocol and address family */ 7421 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL && 7422 mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7423 struct sadb_address *src0, *dst0; 7424 u_int plen; 7425 7426 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7427 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7428 7429 /* check upper layer protocol */ 7430 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7431 IPSECLOG(LOG_DEBUG, "upper layer protocol mismatched.\n"); 7432 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7433 error = EINVAL; 7434 goto senderror; 7435 } 7436 7437 /* check family */ 7438 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7439 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7440 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 7441 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7442 error = EINVAL; 7443 goto senderror; 7444 } 7445 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7446 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7447 IPSECLOG(LOG_DEBUG, 7448 "address struct size mismatched.\n"); 7449 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7450 error = EINVAL; 7451 goto senderror; 7452 } 7453 7454 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7455 case AF_INET: 7456 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7457 sizeof(struct sockaddr_in)) { 7458 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7459 error = EINVAL; 7460 goto senderror; 7461 } 7462 break; 7463 case AF_INET6: 7464 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7465 sizeof(struct sockaddr_in6)) { 7466 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7467 error = EINVAL; 7468 goto senderror; 7469 } 7470 break; 7471 default: 7472 IPSECLOG(LOG_DEBUG, "unsupported address family.\n"); 7473 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7474 error = EAFNOSUPPORT; 7475 goto senderror; 7476 } 7477 7478 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7479 case AF_INET: 7480 plen = sizeof(struct in_addr) << 3; 7481 break; 7482 case AF_INET6: 7483 plen = sizeof(struct in6_addr) << 3; 7484 break; 7485 default: 7486 plen = 0; /*fool gcc*/ 7487 break; 7488 } 7489 7490 /* check max prefix length */ 7491 if (src0->sadb_address_prefixlen > plen || 7492 dst0->sadb_address_prefixlen > plen) { 7493 IPSECLOG(LOG_DEBUG, "illegal prefixlen.\n"); 7494 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7495 error = EINVAL; 7496 goto senderror; 7497 } 7498 7499 /* 7500 * prefixlen == 0 is valid because there can be a case when 7501 * all addresses are matched. 7502 */ 7503 } 7504 7505 if (msg->sadb_msg_type >= __arraycount(key_typesw) || 7506 key_typesw[msg->sadb_msg_type] == NULL) { 7507 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7508 error = EINVAL; 7509 goto senderror; 7510 } 7511 7512 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7513 7514 senderror: 7515 msg->sadb_msg_errno = error; 7516 return key_sendup_mbuf(so, m, target); 7517 } 7518 7519 static int 7520 key_senderror(struct socket *so, struct mbuf *m, int code) 7521 { 7522 struct sadb_msg *msg; 7523 7524 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7525 7526 msg = mtod(m, struct sadb_msg *); 7527 msg->sadb_msg_errno = code; 7528 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7529 } 7530 7531 /* 7532 * set the pointer to each header into message buffer. 7533 * m will be freed on error. 7534 * XXX larger-than-MCLBYTES extension? 7535 */ 7536 static int 7537 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7538 { 7539 struct mbuf *n; 7540 struct sadb_ext *ext; 7541 size_t off, end; 7542 int extlen; 7543 int toff; 7544 7545 KASSERT(m != NULL); 7546 KASSERT(mhp != NULL); 7547 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7548 7549 /* initialize */ 7550 memset(mhp, 0, sizeof(*mhp)); 7551 7552 mhp->msg = mtod(m, struct sadb_msg *); 7553 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7554 7555 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7556 extlen = end; /*just in case extlen is not updated*/ 7557 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7558 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7559 if (!n) { 7560 /* m is already freed */ 7561 return ENOBUFS; 7562 } 7563 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7564 7565 /* set pointer */ 7566 switch (ext->sadb_ext_type) { 7567 case SADB_EXT_SA: 7568 case SADB_EXT_ADDRESS_SRC: 7569 case SADB_EXT_ADDRESS_DST: 7570 case SADB_EXT_ADDRESS_PROXY: 7571 case SADB_EXT_LIFETIME_CURRENT: 7572 case SADB_EXT_LIFETIME_HARD: 7573 case SADB_EXT_LIFETIME_SOFT: 7574 case SADB_EXT_KEY_AUTH: 7575 case SADB_EXT_KEY_ENCRYPT: 7576 case SADB_EXT_IDENTITY_SRC: 7577 case SADB_EXT_IDENTITY_DST: 7578 case SADB_EXT_SENSITIVITY: 7579 case SADB_EXT_PROPOSAL: 7580 case SADB_EXT_SUPPORTED_AUTH: 7581 case SADB_EXT_SUPPORTED_ENCRYPT: 7582 case SADB_EXT_SPIRANGE: 7583 case SADB_X_EXT_POLICY: 7584 case SADB_X_EXT_SA2: 7585 case SADB_X_EXT_NAT_T_TYPE: 7586 case SADB_X_EXT_NAT_T_SPORT: 7587 case SADB_X_EXT_NAT_T_DPORT: 7588 case SADB_X_EXT_NAT_T_OAI: 7589 case SADB_X_EXT_NAT_T_OAR: 7590 case SADB_X_EXT_NAT_T_FRAG: 7591 /* duplicate check */ 7592 /* 7593 * XXX Are there duplication payloads of either 7594 * KEY_AUTH or KEY_ENCRYPT ? 7595 */ 7596 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7597 IPSECLOG(LOG_DEBUG, 7598 "duplicate ext_type %u is passed.\n", 7599 ext->sadb_ext_type); 7600 m_freem(m); 7601 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7602 return EINVAL; 7603 } 7604 break; 7605 default: 7606 IPSECLOG(LOG_DEBUG, "invalid ext_type %u is passed.\n", 7607 ext->sadb_ext_type); 7608 m_freem(m); 7609 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7610 return EINVAL; 7611 } 7612 7613 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7614 7615 if (key_validate_ext(ext, extlen)) { 7616 m_freem(m); 7617 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7618 return EINVAL; 7619 } 7620 7621 n = m_pulldown(m, off, extlen, &toff); 7622 if (!n) { 7623 /* m is already freed */ 7624 return ENOBUFS; 7625 } 7626 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7627 7628 mhp->ext[ext->sadb_ext_type] = ext; 7629 mhp->extoff[ext->sadb_ext_type] = off; 7630 mhp->extlen[ext->sadb_ext_type] = extlen; 7631 } 7632 7633 if (off != end) { 7634 m_freem(m); 7635 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7636 return EINVAL; 7637 } 7638 7639 return 0; 7640 } 7641 7642 static int 7643 key_validate_ext(const struct sadb_ext *ext, int len) 7644 { 7645 const struct sockaddr *sa; 7646 enum { NONE, ADDR } checktype = NONE; 7647 int baselen = 0; 7648 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7649 7650 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7651 return EINVAL; 7652 7653 /* if it does not match minimum/maximum length, bail */ 7654 if (ext->sadb_ext_type >= __arraycount(minsize) || 7655 ext->sadb_ext_type >= __arraycount(maxsize)) 7656 return EINVAL; 7657 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7658 return EINVAL; 7659 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7660 return EINVAL; 7661 7662 /* more checks based on sadb_ext_type XXX need more */ 7663 switch (ext->sadb_ext_type) { 7664 case SADB_EXT_ADDRESS_SRC: 7665 case SADB_EXT_ADDRESS_DST: 7666 case SADB_EXT_ADDRESS_PROXY: 7667 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7668 checktype = ADDR; 7669 break; 7670 case SADB_EXT_IDENTITY_SRC: 7671 case SADB_EXT_IDENTITY_DST: 7672 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7673 SADB_X_IDENTTYPE_ADDR) { 7674 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7675 checktype = ADDR; 7676 } else 7677 checktype = NONE; 7678 break; 7679 default: 7680 checktype = NONE; 7681 break; 7682 } 7683 7684 switch (checktype) { 7685 case NONE: 7686 break; 7687 case ADDR: 7688 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7689 if (len < baselen + sal) 7690 return EINVAL; 7691 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7692 return EINVAL; 7693 break; 7694 } 7695 7696 return 0; 7697 } 7698 7699 static int 7700 key_do_init(void) 7701 { 7702 int i, error; 7703 7704 mutex_init(&key_mtx, MUTEX_DEFAULT, IPL_NONE); 7705 7706 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7707 7708 callout_init(&key_timehandler_ch, 0); 7709 error = workqueue_create(&key_timehandler_wq, "key_timehandler", 7710 key_timehandler_work, NULL, PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 7711 if (error != 0) 7712 panic("%s: workqueue_create failed (%d)\n", __func__, error); 7713 7714 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7715 LIST_INIT(&sptree[i]); 7716 } 7717 7718 LIST_INIT(&sahtree); 7719 7720 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7721 LIST_INIT(®tree[i]); 7722 } 7723 7724 #ifndef IPSEC_NONBLOCK_ACQUIRE 7725 LIST_INIT(&acqtree); 7726 #endif 7727 #ifdef notyet 7728 LIST_INIT(&spacqtree); 7729 #endif 7730 7731 /* system default */ 7732 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7733 ip4_def_policy.refcnt++; /*never reclaim this*/ 7734 7735 #ifdef INET6 7736 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7737 ip6_def_policy.refcnt++; /*never reclaim this*/ 7738 #endif 7739 7740 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7741 7742 /* initialize key statistics */ 7743 keystat.getspi_count = 1; 7744 7745 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7746 7747 return (0); 7748 } 7749 7750 void 7751 key_init(void) 7752 { 7753 static ONCE_DECL(key_init_once); 7754 7755 sysctl_net_keyv2_setup(NULL); 7756 sysctl_net_key_compat_setup(NULL); 7757 7758 RUN_ONCE(&key_init_once, key_do_init); 7759 } 7760 7761 /* 7762 * XXX: maybe This function is called after INBOUND IPsec processing. 7763 * 7764 * Special check for tunnel-mode packets. 7765 * We must make some checks for consistency between inner and outer IP header. 7766 * 7767 * xxx more checks to be provided 7768 */ 7769 int 7770 key_checktunnelsanity( 7771 struct secasvar *sav, 7772 u_int family, 7773 void *src, 7774 void *dst 7775 ) 7776 { 7777 7778 KASSERT(sav->sah != NULL); 7779 7780 /* XXX: check inner IP header */ 7781 7782 return 1; 7783 } 7784 7785 #if 0 7786 #define hostnamelen strlen(hostname) 7787 7788 /* 7789 * Get FQDN for the host. 7790 * If the administrator configured hostname (by hostname(1)) without 7791 * domain name, returns nothing. 7792 */ 7793 static const char * 7794 key_getfqdn(void) 7795 { 7796 int i; 7797 int hasdot; 7798 static char fqdn[MAXHOSTNAMELEN + 1]; 7799 7800 if (!hostnamelen) 7801 return NULL; 7802 7803 /* check if it comes with domain name. */ 7804 hasdot = 0; 7805 for (i = 0; i < hostnamelen; i++) { 7806 if (hostname[i] == '.') 7807 hasdot++; 7808 } 7809 if (!hasdot) 7810 return NULL; 7811 7812 /* NOTE: hostname may not be NUL-terminated. */ 7813 memset(fqdn, 0, sizeof(fqdn)); 7814 memcpy(fqdn, hostname, hostnamelen); 7815 fqdn[hostnamelen] = '\0'; 7816 return fqdn; 7817 } 7818 7819 /* 7820 * get username@FQDN for the host/user. 7821 */ 7822 static const char * 7823 key_getuserfqdn(void) 7824 { 7825 const char *host; 7826 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7827 struct proc *p = curproc; 7828 char *q; 7829 7830 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7831 return NULL; 7832 if (!(host = key_getfqdn())) 7833 return NULL; 7834 7835 /* NOTE: s_login may not be-NUL terminated. */ 7836 memset(userfqdn, 0, sizeof(userfqdn)); 7837 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7838 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7839 q = userfqdn + strlen(userfqdn); 7840 *q++ = '@'; 7841 memcpy(q, host, strlen(host)); 7842 q += strlen(host); 7843 *q++ = '\0'; 7844 7845 return userfqdn; 7846 } 7847 #endif 7848 7849 /* record data transfer on SA, and update timestamps */ 7850 void 7851 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7852 { 7853 7854 KASSERT(sav != NULL); 7855 KASSERT(m != NULL); 7856 if (!sav->lft_c) 7857 return; 7858 7859 /* 7860 * XXX Currently, there is a difference of bytes size 7861 * between inbound and outbound processing. 7862 */ 7863 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7864 /* to check bytes lifetime is done in key_timehandler(). */ 7865 7866 /* 7867 * We use the number of packets as the unit of 7868 * sadb_lifetime_allocations. We increment the variable 7869 * whenever {esp,ah}_{in,out}put is called. 7870 */ 7871 sav->lft_c->sadb_lifetime_allocations++; 7872 /* XXX check for expires? */ 7873 7874 /* 7875 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7876 * in seconds. HARD and SOFT lifetime are measured by the time 7877 * difference (again in seconds) from sadb_lifetime_usetime. 7878 * 7879 * usetime 7880 * v expire expire 7881 * -----+-----+--------+---> t 7882 * <--------------> HARD 7883 * <-----> SOFT 7884 */ 7885 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7886 /* XXX check for expires? */ 7887 7888 return; 7889 } 7890 7891 /* dumb version */ 7892 void 7893 key_sa_routechange(struct sockaddr *dst) 7894 { 7895 struct secashead *sah; 7896 struct route *ro; 7897 const struct sockaddr *sa; 7898 7899 LIST_FOREACH(sah, &sahtree, chain) { 7900 ro = &sah->sa_route; 7901 sa = rtcache_getdst(ro); 7902 if (sa != NULL && dst->sa_len == sa->sa_len && 7903 memcmp(dst, sa, dst->sa_len) == 0) 7904 rtcache_free(ro); 7905 } 7906 7907 return; 7908 } 7909 7910 static void 7911 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7912 { 7913 7914 KASSERT(sav != NULL); 7915 7916 if (sav->state == state) 7917 return; 7918 7919 KASSERT(__LIST_CHAINED(sav)); 7920 LIST_REMOVE(sav, chain); 7921 7922 sav->state = state; 7923 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7924 } 7925 7926 /* XXX too much? */ 7927 static struct mbuf * 7928 key_alloc_mbuf(int l) 7929 { 7930 struct mbuf *m = NULL, *n; 7931 int len, t; 7932 7933 len = l; 7934 while (len > 0) { 7935 MGET(n, M_DONTWAIT, MT_DATA); 7936 if (n && len > MLEN) 7937 MCLGET(n, M_DONTWAIT); 7938 if (!n) { 7939 m_freem(m); 7940 return NULL; 7941 } 7942 7943 n->m_next = NULL; 7944 n->m_len = 0; 7945 n->m_len = M_TRAILINGSPACE(n); 7946 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7947 if (n->m_len > len) { 7948 t = (n->m_len - len) & ~(sizeof(long) - 1); 7949 n->m_data += t; 7950 n->m_len = len; 7951 } 7952 7953 len -= n->m_len; 7954 7955 if (m) 7956 m_cat(m, n); 7957 else 7958 m = n; 7959 } 7960 7961 return m; 7962 } 7963 7964 static struct mbuf * 7965 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7966 { 7967 struct secashead *sah; 7968 struct secasvar *sav; 7969 u_int16_t proto; 7970 u_int8_t satype; 7971 u_int8_t state; 7972 int cnt; 7973 struct mbuf *m, *n; 7974 7975 /* map satype to proto */ 7976 proto = key_satype2proto(req_satype); 7977 if (proto == 0) { 7978 *errorp = EINVAL; 7979 return (NULL); 7980 } 7981 7982 /* count sav entries to be sent to the userland. */ 7983 cnt = 0; 7984 LIST_FOREACH(sah, &sahtree, chain) { 7985 if (req_satype != SADB_SATYPE_UNSPEC && 7986 proto != sah->saidx.proto) 7987 continue; 7988 7989 SASTATE_ANY_FOREACH(state) { 7990 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7991 cnt++; 7992 } 7993 } 7994 } 7995 7996 if (cnt == 0) { 7997 *errorp = ENOENT; 7998 return (NULL); 7999 } 8000 8001 /* send this to the userland, one at a time. */ 8002 m = NULL; 8003 LIST_FOREACH(sah, &sahtree, chain) { 8004 if (req_satype != SADB_SATYPE_UNSPEC && 8005 proto != sah->saidx.proto) 8006 continue; 8007 8008 /* map proto to satype */ 8009 satype = key_proto2satype(sah->saidx.proto); 8010 if (satype == 0) { 8011 m_freem(m); 8012 *errorp = EINVAL; 8013 return (NULL); 8014 } 8015 8016 SASTATE_ANY_FOREACH(state) { 8017 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8018 n = key_setdumpsa(sav, SADB_DUMP, satype, 8019 --cnt, pid); 8020 if (!n) { 8021 m_freem(m); 8022 *errorp = ENOBUFS; 8023 return (NULL); 8024 } 8025 8026 if (!m) 8027 m = n; 8028 else 8029 m_cat(m, n); 8030 } 8031 } 8032 } 8033 8034 if (!m) { 8035 *errorp = EINVAL; 8036 return (NULL); 8037 } 8038 8039 if ((m->m_flags & M_PKTHDR) != 0) { 8040 m->m_pkthdr.len = 0; 8041 for (n = m; n; n = n->m_next) 8042 m->m_pkthdr.len += n->m_len; 8043 } 8044 8045 *errorp = 0; 8046 return (m); 8047 } 8048 8049 static struct mbuf * 8050 key_setspddump(int *errorp, pid_t pid) 8051 { 8052 struct secpolicy *sp; 8053 int cnt; 8054 u_int dir; 8055 struct mbuf *m, *n; 8056 8057 /* search SPD entry and get buffer size. */ 8058 cnt = 0; 8059 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8060 LIST_FOREACH(sp, &sptree[dir], chain) { 8061 cnt++; 8062 } 8063 } 8064 8065 if (cnt == 0) { 8066 *errorp = ENOENT; 8067 return (NULL); 8068 } 8069 8070 m = NULL; 8071 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8072 LIST_FOREACH(sp, &sptree[dir], chain) { 8073 --cnt; 8074 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8075 8076 if (!n) { 8077 *errorp = ENOBUFS; 8078 m_freem(m); 8079 return (NULL); 8080 } 8081 if (!m) 8082 m = n; 8083 else { 8084 m->m_pkthdr.len += n->m_pkthdr.len; 8085 m_cat(m, n); 8086 } 8087 } 8088 } 8089 8090 *errorp = 0; 8091 return (m); 8092 } 8093 8094 int 8095 key_get_used(void) { 8096 return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || 8097 !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); 8098 } 8099 8100 void 8101 key_update_used(void) 8102 { 8103 switch (ipsec_enabled) { 8104 default: 8105 case 0: 8106 #ifdef notyet 8107 /* XXX: racy */ 8108 ipsec_used = 0; 8109 #endif 8110 break; 8111 case 1: 8112 #ifndef notyet 8113 /* XXX: racy */ 8114 if (!ipsec_used) 8115 #endif 8116 ipsec_used = key_get_used(); 8117 break; 8118 case 2: 8119 ipsec_used = 1; 8120 break; 8121 } 8122 } 8123 8124 static int 8125 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8126 { 8127 struct mbuf *m, *n; 8128 int err2 = 0; 8129 char *p, *ep; 8130 size_t len; 8131 int s, error; 8132 8133 if (newp) 8134 return (EPERM); 8135 if (namelen != 1) 8136 return (EINVAL); 8137 8138 s = splsoftnet(); 8139 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8140 splx(s); 8141 if (!m) 8142 return (error); 8143 if (!oldp) 8144 *oldlenp = m->m_pkthdr.len; 8145 else { 8146 p = oldp; 8147 if (*oldlenp < m->m_pkthdr.len) { 8148 err2 = ENOMEM; 8149 ep = p + *oldlenp; 8150 } else { 8151 *oldlenp = m->m_pkthdr.len; 8152 ep = p + m->m_pkthdr.len; 8153 } 8154 for (n = m; n; n = n->m_next) { 8155 len = (ep - p < n->m_len) ? 8156 ep - p : n->m_len; 8157 error = copyout(mtod(n, const void *), p, len); 8158 p += len; 8159 if (error) 8160 break; 8161 } 8162 if (error == 0) 8163 error = err2; 8164 } 8165 m_freem(m); 8166 8167 return (error); 8168 } 8169 8170 static int 8171 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8172 { 8173 struct mbuf *m, *n; 8174 int err2 = 0; 8175 char *p, *ep; 8176 size_t len; 8177 int s, error; 8178 8179 if (newp) 8180 return (EPERM); 8181 if (namelen != 0) 8182 return (EINVAL); 8183 8184 s = splsoftnet(); 8185 m = key_setspddump(&error, l->l_proc->p_pid); 8186 splx(s); 8187 if (!m) 8188 return (error); 8189 if (!oldp) 8190 *oldlenp = m->m_pkthdr.len; 8191 else { 8192 p = oldp; 8193 if (*oldlenp < m->m_pkthdr.len) { 8194 err2 = ENOMEM; 8195 ep = p + *oldlenp; 8196 } else { 8197 *oldlenp = m->m_pkthdr.len; 8198 ep = p + m->m_pkthdr.len; 8199 } 8200 for (n = m; n; n = n->m_next) { 8201 len = (ep - p < n->m_len) ? ep - p : n->m_len; 8202 error = copyout(mtod(n, const void *), p, len); 8203 p += len; 8204 if (error) 8205 break; 8206 } 8207 if (error == 0) 8208 error = err2; 8209 } 8210 m_freem(m); 8211 8212 return (error); 8213 } 8214 8215 /* 8216 * Create sysctl tree for native IPSEC key knobs, originally 8217 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8218 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8219 * and in any case the part of our sysctl namespace used for dumping the 8220 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8221 * namespace, for API reasons. 8222 * 8223 * Pending a consensus on the right way to fix this, add a level of 8224 * indirection in how we number the `native' IPSEC key nodes; 8225 * and (as requested by Andrew Brown) move registration of the 8226 * KAME-compatible names to a separate function. 8227 */ 8228 #if 0 8229 # define IPSEC_PFKEY PF_KEY_V2 8230 # define IPSEC_PFKEY_NAME "keyv2" 8231 #else 8232 # define IPSEC_PFKEY PF_KEY 8233 # define IPSEC_PFKEY_NAME "key" 8234 #endif 8235 8236 static int 8237 sysctl_net_key_stats(SYSCTLFN_ARGS) 8238 { 8239 8240 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8241 } 8242 8243 static void 8244 sysctl_net_keyv2_setup(struct sysctllog **clog) 8245 { 8246 8247 sysctl_createv(clog, 0, NULL, NULL, 8248 CTLFLAG_PERMANENT, 8249 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8250 NULL, 0, NULL, 0, 8251 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8252 8253 sysctl_createv(clog, 0, NULL, NULL, 8254 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8255 CTLTYPE_INT, "debug", NULL, 8256 NULL, 0, &key_debug_level, 0, 8257 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8258 sysctl_createv(clog, 0, NULL, NULL, 8259 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8260 CTLTYPE_INT, "spi_try", NULL, 8261 NULL, 0, &key_spi_trycnt, 0, 8262 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8263 sysctl_createv(clog, 0, NULL, NULL, 8264 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8265 CTLTYPE_INT, "spi_min_value", NULL, 8266 NULL, 0, &key_spi_minval, 0, 8267 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8268 sysctl_createv(clog, 0, NULL, NULL, 8269 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8270 CTLTYPE_INT, "spi_max_value", NULL, 8271 NULL, 0, &key_spi_maxval, 0, 8272 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8273 sysctl_createv(clog, 0, NULL, NULL, 8274 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8275 CTLTYPE_INT, "random_int", NULL, 8276 NULL, 0, &key_int_random, 0, 8277 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8278 sysctl_createv(clog, 0, NULL, NULL, 8279 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8280 CTLTYPE_INT, "larval_lifetime", NULL, 8281 NULL, 0, &key_larval_lifetime, 0, 8282 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8283 sysctl_createv(clog, 0, NULL, NULL, 8284 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8285 CTLTYPE_INT, "blockacq_count", NULL, 8286 NULL, 0, &key_blockacq_count, 0, 8287 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8288 sysctl_createv(clog, 0, NULL, NULL, 8289 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8290 CTLTYPE_INT, "blockacq_lifetime", NULL, 8291 NULL, 0, &key_blockacq_lifetime, 0, 8292 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8293 sysctl_createv(clog, 0, NULL, NULL, 8294 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8295 CTLTYPE_INT, "esp_keymin", NULL, 8296 NULL, 0, &ipsec_esp_keymin, 0, 8297 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8298 sysctl_createv(clog, 0, NULL, NULL, 8299 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8300 CTLTYPE_INT, "prefered_oldsa", NULL, 8301 NULL, 0, &key_prefered_oldsa, 0, 8302 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8303 sysctl_createv(clog, 0, NULL, NULL, 8304 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8305 CTLTYPE_INT, "esp_auth", NULL, 8306 NULL, 0, &ipsec_esp_auth, 0, 8307 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8308 sysctl_createv(clog, 0, NULL, NULL, 8309 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8310 CTLTYPE_INT, "ah_keymin", NULL, 8311 NULL, 0, &ipsec_ah_keymin, 0, 8312 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8313 sysctl_createv(clog, 0, NULL, NULL, 8314 CTLFLAG_PERMANENT, 8315 CTLTYPE_STRUCT, "stats", 8316 SYSCTL_DESCR("PF_KEY statistics"), 8317 sysctl_net_key_stats, 0, NULL, 0, 8318 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8319 } 8320 8321 /* 8322 * Register sysctl names used by setkey(8). For historical reasons, 8323 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8324 * for both IPSEC and KAME IPSEC. 8325 */ 8326 static void 8327 sysctl_net_key_compat_setup(struct sysctllog **clog) 8328 { 8329 8330 sysctl_createv(clog, 0, NULL, NULL, 8331 CTLFLAG_PERMANENT, 8332 CTLTYPE_NODE, "key", NULL, 8333 NULL, 0, NULL, 0, 8334 CTL_NET, PF_KEY, CTL_EOL); 8335 8336 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8337 sysctl_createv(clog, 0, NULL, NULL, 8338 CTLFLAG_PERMANENT, 8339 CTLTYPE_STRUCT, "dumpsa", NULL, 8340 sysctl_net_key_dumpsa, 0, NULL, 0, 8341 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8342 sysctl_createv(clog, 0, NULL, NULL, 8343 CTLFLAG_PERMANENT, 8344 CTLTYPE_STRUCT, "dumpsp", NULL, 8345 sysctl_net_key_dumpsp, 0, NULL, 0, 8346 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8347 } 8348
Indexes created Tue Sep 23 07:09:52 GMT 2025